Second, avoid operating the pump without material.

The progressive screw pump absolutely must not run dry. If dry running occurs, the rubber stator can instantly overheat due to dry friction and burn out. Therefore, having a properly functioning grinder and clear screens are essential conditions for the normal operation of the pump. For this reason, some pumps are equipped with a dry-run protection device. When material supply is interrupted, the self-priming capability of the pump creates a vacuum in the chamber, which triggers the vacuum device to stop the pump.

 

Third, maintain a constant outlet pressure.

The progressive screw pump is a positive displacement rotary pump. If the outlet is blocked, the pressure will gradually rise, potentially exceeding the predetermined value. This causes a sharp increase in the motor load, and the load on related transmission components may also exceed design limits. In severe cases, this can lead to motor burnout or broken transmission parts. To prevent pump damage, a bypass relief valve is usually installed at the outlet to stabilize the discharge pressure and ensure normal pump operation.

Fourth, reasonable selection of pump speed.

The flow rate of the progressive screw pump has a linear relationship with its speed. Compared to low-speed pumps, high-speed pumps can increase flow and head, but power consumption increases significantly. High speed accelerates the wear between the rotor and stator, inevitably leading to premature pump failure. Furthermore, the stator and rotor of high-speed pumps are shorter and wear out more easily, thus shortening the pump's service life.

 

Using a gear reducer or variable speed drive to reduce the speed, keeping it within a reasonable range below 300 revolutions per minute, can extend the pump's service life several times compared to high-speed operation.

 

Of course, there are many other maintenance methods for progressive screw pumps, which requires us to be more attentive during daily use. Careful observation will contribute significantly to proper pump maintenance.

 

How should faults in progressive screw pumps be handled? This article will mainly introduce methods for troubleshooting progressive screw pumps.

1. Pump body vibrates violently or produces noise:

A. Causes:​ Pump not installed securely or installed too high; damage to the motor's ball bearings; bent pump shaft or misalignment (non-concentricity or non-parallelism) between the pump shaft and the motor shaft.

B. Solutions:​ Secure the pump properly or lower its installation height; replace the motor's ball bearings; straighten the bent pump shaft or correct the relative position between the pump and the motor.

2. Transmission shaft or motor bearings overheating:

A. Causes:​ Lack of lubricant or bearing failure.

B. Solutions:​ Add lubricant or replace the bearings.

3. Pump fails to deliver water:

Causes:​ Pump body and suction pipe not fully primed with water; dynamic water level below the pump strainer; cracked suction pipe, etc.

 

The sealing surface between the screw and the housing is a spatial curved surface. On this surface, there are non-sealing areas such as ab or de, which form many triangular notches (abc, def) with the screw grooves. These triangular notches form flow channels for the liquid, connecting the groove A of the driving screw to grooves B and C on the driven screw. Grooves B and C, in turn, spiral along their helices to the back side and connect with grooves D and E on the back, respectively. Because the sealing surface where grooves D and E connect with groove F (which belongs to another helix) also has triangular notches similar to a'b'c' on the front side, D, F, and E are also connected. Thus, grooves A-B-C-D-E-A form an "∞"-shaped sealed space (If single-start threads were used, the grooves would simply follow the screw axis and connect the suction and discharge ports, making sealing impossible). It's conceivable that many independent "∞"-shaped sealed spaces are formed along such a screw. The axial length occupied by each sealed space is exactly equal to the lead (t) of the screw. Therefore, to separate the suction and discharge ports, the length of the threaded section of the screw must be at least greater than one lead.

 

 

High-temperature magnetic drive pumps are compact, aesthetically pleasing, small in size, and feature stable, user-friendly operation with low noise levels. They are widely used in chemical, pharmaceutical, petroleum, electroplating, food, film processing, scientific research institutions, defense industries, and other sectors for pumping acids, alkaline solutions, oils, rare and valuable liquids, toxic liquids, volatile liquids, and in circulating water equipment, as well as for supporting high-speed machinery. They are particularly suitable for liquids that are prone to leakage, evaporation, combustion, or explosion. It is best to choose an explosion-proof motor for such pumps.

Advantages of High-Temperature Magnetic Drive Pumps:

1. No need to install a foot valve or prime the pump.

2. The pump shaft is changed from dynamic sealing to enclosed static sealing, completely avoiding media leakage.

3. No independent lubrication or cooling water is required, reducing energy consumption.

4. Power transmission is changed from coupling drive to synchronous dragging, eliminating contact and friction. This results in low power consumption, high efficiency, and provides damping and vibration reduction, minimizing the impact of motor vibration on the pump and pump cavitation vibration on the motor.

5. In case of overload, the inner and outer magnetic rotors slip relative to each other, protecting the motor and pump.

6. If the driven component of the magnetic drive operates under overload conditions or the rotor jams, the driving and driven components of the magnetic drive will automatically slip, protecting the pump. Under these conditions, the permanent magnets in the magnetic drive will experience eddy current losses and magnetic losses due to the alternating magnetic field of the driving rotor, causing the temperature of the permanent magnets to rise and leading to the failure of the magnetic drive slip.

 

 

Precautions for Using High-Temperature Magnetic Drive Pumps:

1. Prevent Particle Entry

(1) Do not allow ferromagnetic impurities or particles to enter the magnetic drive or the bearing friction pair.

(2) After transporting media prone to crystallization or sedimentation, flush promptly (fill the pump cavity with clean water after stopping the pump, run for 1 minute, then drain completely) to ensure the service life of the sliding bearings.

(3) When pumping media containing solid particles, install a filter at the pump inlet.

 

2. Prevent Demagnetization

(1) The magnetic torque must not be designed too small.

(2) Operate within the specified temperature conditions; strictly avoid exceeding the maximum allowable media temperature. A platinum resistance temperature sensor can be installed on the outer surface of the isolation sleeve to monitor the temperature rise in the gap area, enabling an alarm or shutdown if the temperature limit is exceeded.

 

3. Prevent Dry Running

(1) Strictly prohibit dry running (operating without liquid).

(2) Strictly avoid running the pump dry or allowing the media to be completely drained (cavitation).

(3) Do not operate the pump continuously for more than 2 minutes with the discharge valve closed, to prevent overheating and failure of the magnetic drive.

 

4. Not for Use in Pressurized Systems:​

Due to the existence of certain clearances in the pump cavity and the use of "static bearings," this series of pumps must absolutely not be used in pressurized systems (neither positive pressure nor vacuum/negative pressure is acceptable).

 

5. Timely Cleaning:​

For media that are prone to sedimentation or crystallization, clean the pump promptly after use and drain any residual liquid from the pump.

 

6. Regular Inspection:​

After 1000 hours of normal operation, disassemble and inspect the wear of the bearings and the end face dynamic ring. Replace any worn-out vulnerable parts that are no longer suitable for use.

 

7. Inlet Filtration:​

If the pumped medium contains solid particles, install a strainer at the pump inlet. If it contains ferromagnetic particles, a magnetic filter is required.

 

8. Operating Environment:​

The ambient temperature during pump operation should be less than 40°C, and the motor temperature rise should not exceed 75°C.

 

9. Media and Temperature Limits:​

The pumped medium and its temperature must be within the allowable range of the pump materials. For engineering plastic pumps, the temperature should be <60°C; for metal pumps, <100°C. The suction pressure should not exceed 0.2MPa, the maximum working pressure is 1.6MPa, for liquids with a density not greater than 1600 kg/m³ and a viscosity not greater than 30 x 10⁻⁶ m²/s, and which do not contain hard particles or fibers.

High-temperature magnetic drive pumps replace dynamic seals with static seals, making the pump's wetted parts fully enclosed. This solves the unavoidable running, dripping, and leaking issues associated with the mechanical seals of other pumps. Manufactured using highly corrosion-resistant materials such as engineering plastics, alumina ceramics, and stainless steel, these pumps offer excellent corrosion resistance and ensure the pumped media remains uncontaminated.

 

Stainless steel submersible pumps are widely used in drainage applications across industries such as pharmaceuticals, environmental protection, food, chemical, and power due to their characteristics of corrosion resistance, hygiene, energy efficiency, environmental friendliness, non-clogging, high flow rate, and strong passage capability. Anhui Shengshi Datang will study together with everyone.

I. Common Causes and Solutions for Insufficient Flow or No Water Output in Stainless Steel Submersible Pumps:

1. The installation height of the pump is too high, resulting in insufficient impeller immersion depth and reduced water output. Control the allowable deviation of the installation elevation and avoid arbitrary adjustments.

2. The pump rotates in the reverse direction. Before trial operation, run the motor without load to ensure the rotation direction matches the pump. If this occurs during operation, check whether the power phase sequence has changed.

3. The outlet valve cannot open. Inspect the valve and perform regular maintenance.

4. The outlet pipeline is blocked, or the impeller is clogged. Clear blockages in the pipeline and impeller, and regularly remove debris from the reservoir.

5. The lower wear ring of the pump is severely worn or blocked by debris. Clean the debris or replace the wear ring.

6. The density or viscosity of the pumped liquid is too high. Identify the cause of the change in liquid properties and address it.

7. The impeller is detached or damaged. Reinforce or replace the impeller.

8. When multiple pumps share a common discharge pipeline, a check valve is not installed or the check valve is not sealing properly. Install or replace the check valve after inspection.

II. Causes of Abnormal Vibration and Instability During Operation of Stainless Steel Submersible Pumps:

1. The anchor bolts of the pump base are not tightened or have become loose. Tighten all anchor bolts evenly.

2. The outlet pipeline lacks independent support, causing pipeline vibration to affect the pump. Provide independent and stable support for the outlet pipeline, ensuring the pump’s outlet flange does not bear weight.

3. The impeller is unbalanced, damaged, or loosely installed. Repair or replace the impeller.

4. The upper or lower bearings of the pump are damaged. Replace the bearings.

III. Causes of Overcurrent, Motor Overload, or Overheating in Stainless Steel Submersible Pumps:

1. The operating voltage is too low or too high. Check the power supply voltage and adjust it.

2. There is friction between rotating and stationary parts inside the pump, or between the impeller and the seal ring. Identify the location of the friction and resolve the issue.

3. Low head and high flow cause a mismatch between the motor power and the pump characteristics. Adjust the valve to reduce the flow, ensuring the motor power matches the pump.

4. The pumped liquid has high density or viscosity. Investigate the cause of the change in liquid properties and adjust the pump’s operating conditions.

5. The bearings are damaged. Replace the bearings at both ends of the motor.

IV. Causes and Solutions for Low Insulation Resistance in Stainless Steel Submersible Pumps:

1. The cable ends were submerged during installation, or the power or signal cable was damaged, allowing water ingress. Replace the cable or signal wire, and dry the motor.

2. The mechanical seal is worn or not properly installed. Replace the upper and lower mechanical seals, and dry the motor.

3. The O-rings have aged and lost their function. Replace all sealing rings and dry the motor.

V. Causes and Solutions for Visible Water Leakage in Pipes or Flange Connections of Stainless Steel Submersible Pump Systems:

1. The pipeline itself has defects and was not pressure-tested.

2. The gasket connection at the flange joint was not properly handled.

3. The flange bolts were not tightened correctly. Repair or replace defective pipes, realign misaligned pipes, and ensure bolts are inserted and tightened freely. After installation, conduct a pressure and leakage test on the entire system. Replace components as necessary.

VI. Internal Leakage in Stainless Steel Submersible Pumps:

Leakage in the pump can lead to insulation failure, bearing damage, alarm activation, and forced shutdown. The main causes include failure of dynamic seals (mechanical seals) or static seals (cable inlet seals, O-rings), and damage to power or signal cables allowing water ingress. Alarms such as water immersion, leakage, or humidity may trigger shutdowns. Before installation, inspect the quality of all sealing components. Ensure proper contact between sealing surfaces during installation. Before operation, check the motor’s phase-to-phase and ground insulation resistance, and ensure all alarm sensors are functional. If leakage occurs during operation, replace all damaged seals and cables, and dry the motor. Do not reuse disassembled seals or cables.

VII. Reverse Rotation After Shutdown of Stainless Steel Submersible Pumps:

1. Reverse rotation occurs after the pump motor is powered off, mainly due to failure of the check valve or flap valve in the outlet pipeline.

2. Before installation, inspect the check valve for correct orientation and ensure the flap valve is centered and operates flexibly. Regularly inspect the check valve or flap valve during operation, and repair or replace damaged components with quality parts.

 

 

Fluoroplastic self-priming pumps, also known as the TIZF series fluoroplastic self-priming pumps, are designed and manufactured in accordance with international standards and the manufacturing processes for non-metallic pumps. The pump structure adopts a self-priming design. The pump casing consists of a metal shell lined with fluoroplastic, and all wetted parts are made of fluoroplastic alloy. Components like the pump cover and impeller are manufactured by integrally sintering and pressing metal inserts coated with fluoroplastic. The shaft seal utilizes an advanced external bellows mechanical seal. The stationary ring is made of 99.9% alumina ceramic (or silicon nitride), and the rotating ring is made of PTFE-filled material, ensuring highly stable corrosion resistance, wear resistance, and sealing performance.

 

A fluoroplastic self-priming pump does not require priming before startup (although the initial installation still requires priming). After a short period of operation, the pump can draw fluid up and commence normal operation through its own action.

 

Fluoroplastic self-priming pumps can be classified by their operating principle into the following categories:

1.Gas-liquid mixing type (including internal mixing and external mixing).

2.Water ring type.

3.Jet type (including liquid jet and gas jet).

 

 

Working process of the gas-liquid mixing self-priming pump: Due to the special structure of the pump casing, a certain amount of water remains in the pump after it stops. When the pump is started again, the rotation of the impeller fully mixes the air in the suction line with the water. This mixture is discharged into the gas-water separation chamber. The gas in the upper part of the separation chamber escapes, while the water in the lower part returns to the impeller to mix again with the remaining air in the suction line. This process continues until all gas in the pump and suction line is expelled, completing the self-priming process and allowing normal pumping.

 

Water ring self-priming pumps​ integrate a water ring and the pump impeller within a single housing, using the water ring to expel gas and achieve self-priming. Once the pump operates normally, the passage between the water ring and the impeller can be closed off via a valve, and the liquid within the water ring can be drained.

 

Jet self-priming pumps: consist of a centrifugal pump combined with a jet pump (or ejector). They rely on the ejector device to create a vacuum at the nozzle to achieve suction.

 

The self-priming height of a fluoroplastic self-priming pump is related to factors such as the front impeller seal clearance, pump speed, and liquid level height in the separation chamber. A smaller front impeller seal clearance results in a greater self-priming height, typically set between 0.3-0.5 mm. If the clearance increases, besides a decrease in self-priming height, the pump's head and efficiency also reduce. The self-priming height increases with the rise in the impeller's peripheral velocity (u2). However, once the maximum self-priming height is reached, further speed increases will not raise the height but only shorten the priming time. If the speed decreases, the self-priming height also decreases. Under other constant conditions, the self-priming height increases with a higher stored water level (but should not exceed the optimal water level for the separation chamber).

 

To better facilitate gas-liquid mixing within the self-priming pump, the impeller should have fewer blades, increasing the pitch of the blade grid. It is also advisable to use a semi-open impeller (or an impeller with wider flow channels), as this allows the returning water to penetrate more deeply into the impeller blade grid.

Most fluoroplastic self-priming pumps are matched with internal combustion engines and mounted on movable carts, making them suitable for field operations.

 

What is the working principle of a fluoroplastic self-priming pump?

For a standard centrifugal pump, if the suction liquid level is below the impeller, it must be primed with water before startup, which is inconvenient. To retain water in the pump, a foot valve is required at the inlet of the suction pipe, but this valve causes significant hydraulic losses during operation.

A self-priming pump, as described above, does not require priming before startup (except for the initial installation). After a short operation, it can draw fluid up and begin normal operation. The classification and working principles of the different self-priming types (gas-liquid mixing, water ring, jet) are as previously detailed.

Traditional bridge tower type multi cutting machine has long been pivotal equipment in granite slab production. However, their low efficiency, complex operation, and environmental pollution issues have increasingly rendered them inadequate for modern manufacturing demands. Consequently, multi wire saw for granite slabs have emerged, effectively resolving numerous challenges in contemporary granite slab production.

Specifically engineered for large-scale granite block cutting, the granite wire saw cutting machine offers multiple specification options and can simultaneously cut granite slabs ranging from 20 to 30 millimetres in thickness. It delivers exceptionally high cutting efficiency while ensuring precision and surface smoothness in the cut slabs. Additionally, its low operational noise significantly improves the working environment.

Key features include:

1.Compact structure with minimal footprint, energy-efficient and environmentally friendly operation, high processing efficiency, cutting speeds up to 0-35m/s, and straightforward operation.

2.Utilises a PLC digital control system, allowing users to customise operational parameters via the display screen for fully automated running.

3.Cooling water used during cutting is recycled, promoting environmental sustainability and resource conservation.

4.Large panel spacers can be automatically positioned during sawing without halting operation, substantially boosting production efficiency.

5.Cut surfaces exhibit superior smoothness while reducing sawing costs.

The multi wire saw machine employs multiple diamond wires to cut granite blocks. These wires, measuring 6.3-7.3mm in diameter, feature a surface coated with threaded diamond beads. Each metre of diamond wire contains 37 beads. These diamond beads act as abrasives, completing the cut under the cooling and cleaning action of a water flow, with excess material discharged with the water flow.

To optimise diamond wire efficiency, the following operational practices are recommended:
Shape the top and bottom surfaces of the block prior to sawing.
The block should be positioned on two supports and secured with cement bonding.

Within the stone processing sector, cylindrical forms such as Roman columns and baluster posts remain enduringly classic elements in architectural decoration. However, traditional manual processing methods suffer from low efficiency and limited precision, struggling to meet the demands of modern mass production. The emergence of the stone lathe machine addresses precisely this challenge, establishing itself as the ideal equipment for processing cylindrical stone components.

Capable of contour profiling and cutting, the stone lathe is suitable for common materials including granite, marble, and engineered stone. It holds broad application prospects across architectural decoration, home renovation, and craft production. It can process balusters, columns, vases, railings, and various decorative architectural components. CNC lathe machine  can simultaneously cut 2-4 balusters, doubling production efficiency to meet batch processing demands. Haineng baluster cutting machine employs advanced electronic technology and fibre optic probes to achieve precise profiling through template scanning. This technology not only offers high automation but also significantly enhances machining accuracy, ensuring every product meets design specifications. Additionally, the lathe stone cutting machine features a robust structure with minimal clearance, resulting in reduced tool wear and extended service life.

This integrated design offers straightforward operation with standardised workpieces. Automated processing substantially boosts efficiency, making it particularly suited for mass production scenarios. It eliminates the heavy manual labour of traditional methods, enabling users to fulfil orders swiftly and enhance market competitiveness.

Moreover, Marble Lathe boasts an aesthetically pleasing form and innovative structure. It not only adds a touch of modernity to workshops but has also garnered widespread acclaim for its highly efficient user experience. Simple operation and user-friendly design ensure even novices can master it swiftly, guaranteeing a smooth machining process. Quality remains consistently high, producing stone products with smooth surfaces and flowing lines that perfectly meet the demands of high-end architectural decoration.

Renowned in overseas markets for its advanced technology, high efficiency, and user-centric design,  Haineng Stone Lathe Railing Profiling Machine has gained considerable popularity.

Stone edge grinding machine are pivotal equipment within the stone processing industry, specifically engineered for grinding, polishing and shaping the edges of natural and engineered stone materials such as marble and granite. Capable of producing a diverse range of decorative edge profiles—from simple chamfers and rounded edges to intricate European and French edges—they serve as indispensable machinery for stone processing plants, kitchen worktop manufacturers and decorative engineering projects.

The Haineng 19 head multi-functional stone edge profiling polishing machine features high automation and intuitive operation, effectively reducing manual labour intensity while significantly enhancing processing efficiency and consistency to meet batch production demands. By swapping different grinding wheels or heads and employing a combination of profiling and polishing mechanisms, it flexibly shapes stone edges into straight, bevelled, rounded, semi-circular, and other profiles, with adjustable edge widths to suit specific requirements. The finished stone edges exhibit smooth lines and precise forms, making it widely applicable for edge treatment on diverse stone products such as kitchen worktops, floor panels, and stair treads, fulfilling varied decorative and functional requirements.

Furthermore, this equipment boasts excellent compatibility and expandability, enabling collaborative operation with other stone processing machinery (such as grooving machines and drilling machines) to achieve integrated multi-process machining. With the proliferation of CNC technology, certain high-end models now support CNC numerical control systems, enabling high-precision positioning and automated grinding, thereby further enhancing machining accuracy and production efficiency.

As an indispensable component in stone processing, stone edge polishing machine play a vital role in enhancing product aesthetics and added value. Looking ahead, driven by evolving manufacturing techniques and market demands, these machines will continue to innovate, delivering more efficient and intelligent processing solutions for the industry.

 

Imagine you are in charge of a busy construction site. You need rock crusher cones to crush hard stone into smaller pieces. These machines help you work faster and make your job easier. If you know how high-efficiency industrial cone crusher technology works, you can save up to 15% on energy bills. You can also lower maintenance costs by almost one third. This knowledge helps your site run well and saves money every day.

What Are Rock Crusher Cones

Definition

Rock crusher cones break hard rocks into smaller pieces. They squeeze stones between a moving cone and a bowl. The cone spins inside the chamber. This crushes the rocks until they are small enough. These machines are compression crushers. The mantle turns inside a bowl lined with manganese. You get smaller rocks and even results every time.

Tip: Rock crusher cones work best for medium or hard rocks.

 

• Rock crusher cones crush medium and hard mineral rocks.

• They use less energy and work faster than other crushers.

• You can quickly turn big rocks into small ones.

Key Features

Rock crusher cones have a special design. Each part helps crush rocks and makes the machine last longer. Here is a table that shows the main parts and what they do:

 

 

Modern rock crusher cones have new features to help them work better:

 

Advantages

Rock crusher cones give you many good things at your site. Here are the main benefits:

1. You get even, high-quality rocks. The pieces are all the same size, which helps with building roads and buildings.

2. You save energy. These machines use compression, so you spend less on power and fuel.

3. The machine lasts longer. The parts wear out slowly, so you do not need to fix or replace them often.

Rock crusher cones help you work faster and better. You can use them in quarries, mines, and recycling centers. These machines give you exact results and keep your work going smoothly. You can change the settings easily and get the right size rocks for your job.

Cone Crushers: How They Work

Components

You find several important parts inside cone crushers. Each part helps you get the best results from your crushing tasks. The mainframe gives strong support and keeps everything steady. The crushing chamber lets rocks move smoothly and helps you get even sizes. The mantle and concave do most of the crushing work. These parts use tough materials to handle hard rocks. Bearings help the machine run smoothly and carry heavy loads. You need to check these parts often to keep your cone crushers working well.

 

Tip: Regular checks on bearings and the crushing chamber help you avoid costly repairs.

Crushing Process

Cone crushers use a special crushing process. You feed rocks into the top. The mantle moves in a circle inside the crushing chamber. Rocks get squeezed between the mantle and the concave. This action breaks the rocks into smaller pieces. You can choose different crushing chambers for different jobs. Each chamber changes the feed size, discharge size, and crushing ratio.

 

 

You get to pick the right chamber for your crushing needs. This choice helps you control the size and quality of your final product.

Types

You can use different types of cone crushers for different crushing jobs. Each type fits a special role in mining, quarrying, or recycling.

 

 

• Mining: You use cone crushers for crushing hard materials.

• Quarrying: Cone crushers help you make lots of aggregates.

• Recycling: You use cone crushers to crush asphalt and other materials.

You can see how cone crushers give you many choices for your crushing needs. You get the right size and shape for every job.

Technology in Cone Crushers

Design Innovations

Modern cone crushers have many new features. These changes help you work faster and stay safe. The HP350e model works up to 10% better than old models for secondary jobs. You can pick different settings to fit your needs. No-backing liners let you change parts quickly and keep things clean. A feed cone lifting tool helps you move the feed cone safely. Tramp release cylinders make fixing the machine easier. The head anti-spin brake helps the liner last longer. You can get chambers made for special jobs, so you always get good results. Many parts also fit older HP300 models, so you save money when you upgrade.

 

Automation

Automation makes cone crushers smarter and safer. You do not have to change settings by hand. The system checks the load and changes settings for you. This keeps your cone crusher working well. You get alerts if something is wrong. You can fix problems before they get worse.

“Automation ensures the best possible performance,” said Vincent Celsi, vice president of crushers for Metso Outotec. In Metso’s MX cone crusher line, settings are automatically adjusted based on load conditions, which improves the utilization of wear parts as well as worker safety.

 

• Automation systems keep you away from danger.

• Real-time monitoring warns you about unsafe things.

• You can fix problems before the machine fails.

• Automated alerts help you spot issues like bowl float and stop damage.

Safety

Safety features keep you and your team safe when using a heavy duty hydraulic cone crusher. Hydraulic chamber clearing opens the crusher to a safe spot. Hydraulic overload relief stops damage from heavy loads. Hydraulic adjustment lets you change settings without touching moving parts. Common Level Design means you do not need much maintenance. Centralized control lets you stop everything from one place. Conveyor safety features help keep your site safe. Hydraulic overload protection and automated controls make your work safer every day.

 

• Hydraulic chamber clearing system opens the cone safely.

• Hydraulic overload relief protects parts from damage.

• Hydraulic adjustment keeps output steady.

• Centralized control allows emergency stops.

• Conveyor safety features reduce risks.

• Automated systems improve safety for everyone.

Applications

Mining

Cone crushers are used a lot in mining. They break big rocks into smaller pieces. This step is needed before getting minerals out. Cone crushers work well with hard and rough stone. They crush ores like iron, copper, and gold. You need these machines to get raw material ready for the next step. Using crushers in mining helps you save time and get better results.

Construction

You see cone crushers on large building sites. They make raw materials smaller and easier to use. This is the first step to make aggregates for roads and buildings. Crushing equipment helps you meet size and quality rules. You can trust crushers to give you the right material for concrete and asphalt. Using crushers in construction keeps your project on time and on budget.

Tip: Cone crushers help you get the right size of aggregate for any job.

Recycling

Cone crushers can recycle concrete, bricks, and asphalt. These machines turn waste into new building material. You help the planet by using less landfill space. Crushers break down old roads and buildings so you can use the material again. Here is how crushers help in recycling:

 

 

• Crushers are used for fine crushing of asphalt.

• The machine squeezes the material to shape it.

• You get good recycled asphalt that fits your needs.

Other Industries

Cone crushers are used in many other jobs. They help you process sand, gravel, and building materials. You also use them in mineral plants. Here is where you might use crushers:

 

 

You can trust crushers to do hard work in any industry. They help you get raw materials ready for many uses and always work well.

Cone Crusher Maintenance

Daily Tasks

You should check your crusher every day. These checks help you find problems early. This way, you can avoid big repairs. Start by looking at the machine for leaks or broken parts. Check for any trash or dirt around the crusher. Make sure the oil is clean and at the right level. Look at the hydraulic system pressure. It should match what the maker says. Write down the temperatures while the crusher runs. If the oil or bearings get too hot, there could be a problem. Listen for odd sounds like grinding or knocking. These noises can mean something is wearing out.

 

Here is a table to help you remember your daily tasks:

 

Check if all moving parts have enough oil. Make sure the rocks you put in are the right kind. Using the wrong rocks can wear out the crusher faster. Look for leaks in the hydraulic system. Leaks can be dangerous.

Tip: Daily checks help you find problems early. Use a checklist to keep track and train your team to follow it every day.

Weekly Checks

Weekly checks go further than daily ones. Look for wear on the mantle and concave. Check if all bolts are tight. Loose bolts can break the machine. Look at the belts and pulleys for cracks or damage. Clean off dust and dirt from the crusher. Make sure the oil and filters are not dirty. If the oil is dirty, change it right away. Listen to the bearings for strange sounds or heat. These steps help your crusher last longer.

 

• Look for wear on important parts.

• Tighten all bolts.

• Clean dust and dirt from the crusher.

• Check belts and pulleys for damage.

• Change oil and filters if they are dirty.

• Listen for odd sounds from bearings.

 

Doing these checks each week helps you catch small problems. This keeps your crusher working well for a long time.

Long-Term Care

Long-term care helps your crusher last for years. You need to do preventative maintenance. Take care of the bearings so they last longer. Change the oil often. Clean the bearings to keep out dust and dirt. Watch the bearing temperatures. If they get too hot, stop and fix the problem. Check the seals to stop oil leaks.

 

Follow these steps for long-term care:

1. Take care of bearings so they last longer.

2. Change oil when needed.

3. Clean bearings to keep out dirt.

4. Watch bearing temperatures and stop if too hot.

5. Check seals to stop leaks.

 

Good maintenance can make your crusher parts last 30% longer. This saves you money and keeps your machine working well.

Common Mistakes

Many people make the same mistakes when caring for crushers. These mistakes can break the machine and stop work. Here is a table of common mistakes and what can happen:

 

 

You need to watch for these mistakes. Fix them fast to stop bigger problems. Always use clean oil and check for leaks. Never ignore strange sounds or shaking.

Tools

You need the right tools to take care of your crusher. Lifting tools help you move heavy parts safely. Special tools let you change worn parts quickly. An advanced mounting rack makes changing parts easier and faster.

 

 

Note: Using the right tools keeps your team safe and helps you finish maintenance faster.

Keep these tools ready at all times. They help you do maintenance with less risk and more speed.

Troubleshooting

Common Issues

Sometimes, cone crushers have problems. These problems can slow your work or break the machine. Here are some issues you might see:

 

• Oil gets too hot if oil is bad or too low.

• Oil temperature and pressure go up if tubes are blocked.

• Oil pressure is low after starting if pipes are blocked.

• Oil gets dirty with mud if seals do not work.

• Water gets in oil from leaks or pressure trouble.

• The crusher shakes a lot if the base is loose or rocks are too hard.

• The crushing cone spins too fast if there are oil issues.

• The moving cone speeds up fast if bearings are broken.

• The shaft does not spin evenly if gears are damaged.

• You hear splitting sounds if lining plates are loose.

• The coupling spins but the crusher does not move if keys are broken.

• Loud knocking happens if gears are not put in right.

• The supporting ring jumps if something gets stuck inside.

• Big pieces come out if liners are worn out.

 

Tip: Check your crusher often. Finding problems early keeps your site safe and stops bigger trouble.

Solutions

You can fix most cone crusher problems with easy steps. The table below shows what to do for each problem:

 

 

Most problems can be fixed by doing these steps. Checking your crusher often and fixing things fast helps it last longer and work better. 

 

Rock crusher cones help you get good results in mining, construction, and recycling. You can save money if you follow a regular maintenance plan. Daily checks stop breakdowns and help your equipment last longer. Watch oil temperature and pressure to keep things running well. Always fill the crushing chamber to get the best results. Learning about new technology gives you more control and less waiting for repairs.

 

 

Keep learning and ask experts for help to keep your work going strong.

Looking for TBM Tunnel Boring Machines for your project? You can buy new or refurbished machines. Top manufacturers and special dealers sell them. You can also find them on online sites. The market is getting bigger. It was worth $6.7 billion in 2023. It may reach $9.4 billion by 2030.

Many contractors pick refurbished machines to save money. New machines can cost more than $50 million. You should choose the type that fits your project. Think about cost and the supplier’s reputation.

Key Takeaways

• Think about how much money you can spend. New TBM Tunnel Boring Machines cost a lot. Some new machines cost more than $50 million. Refurbished machines usually cost much less.

• Look up suppliers before you buy. Find companies people trust. Read reviews to see if they are good. This helps you get a machine that works well. Good support is important too.

• Check how well the TBM works and its warranty. New machines have brand new parts. Refurbished machines depend on how well they were fixed.

• Think about what your project needs. Pick a new TBM for better technology. New ones are also more reliable. Refurbished machines save money. They are also ready faster.

• Always ask if you can change the machine. Some suppliers can make machines fit your project. This helps you get what you need.

 

New TBM Tunnel Boring Machines

Major Suppliers

If you want a new TBM Tunnel Boring Machine, you have lots of options. You can buy from big manufacturers or from trusted dealers. Some websites, like Alibaba and Made-in-China, also sell these machines. Here are some famous suppliers you can check:

• CRCHI (China)

• CREG (China)

• E-BERK (Turkey)

• EM Korea (South Korea)

• Herrenknecht (Germany)

• Hitachi Zosen (Japan)

• Hoban (South Korea)

• JIMT - JIM Technology Corporation (Japan)

• Kawasaki (Japan)

• Komatsu (Japan)

• LNSS (China)

• Lovsuns (China/Canada)

• NHI (China)

• OGITEC - Underground Infrastructure Technologies (Japan)

• Robbins (USA/China)

• SELI (Italy)

• STEC (China)

• Tangxing (China)

• Terratec (Australia)

• Tianye Tolian (China)

You can get machines for different tunnel sizes and types. Some suppliers let you choose the diameter and features you need.

Tip: Always ask if you can change the size or add features. You might need something special for your tunnel work.

 

Here is a simple table showing prices for new TBM Tunnel Boring Machines by diameter and type:

Evaluating New TBM Sellers

Picking the right seller is important. You want a machine that works well and lasts long. Here are things to check before you buy:

• How strong the machine is

• How much it costs to fix

• If spare parts are easy to get

• How much it costs over time

• If the seller helps you after you buy

If you ask about these things, you can avoid trouble later. Good help means you get support fast if something breaks. Sellers you can trust will answer your questions and explain their TBM Tunnel Boring Machines clearly.

Refurbished TBM Tunnel Boring Machines

Refurbishing Companies

You might want to save money on your next project. Refurbished TBM Tunnel Boring Machines can help you do that. Some companies focus on making old machines work like new again. Here are a few you should know:

• Herrenknecht: This company offers rebuilding services for TBMs. They work with clients all over the world.

• Robbins: Robbins has a lot of experience with refurbishing TBMs. They have worked on projects in places like Vietnam.

These companies take used machines, fix them up, and make sure they are ready for new jobs. You can find both small and large TBMs through these services.

 

Online Marketplaces

You can also look for refurbished TBMs on online marketplaces. These websites list many machines from different sellers. Some popular sites include:

• Equipment Trader

• Truck1 USA

• MachineryTrader

You can compare prices, machine sizes, and features. Refurbished TBMs often cost much less than new ones. Here’s a quick look at price ranges:

Tip: Always check the seller’s reviews before you buy. A trusted seller will answer your questions and share machine details.

 

Quality Checks

You want your refurbished TBM to work well. Good companies follow strict steps to check each machine. They look at every part and fix what needs repair. Here’s what the process looks like:

Some companies set rules for what counts as a full rebuild or just a simple fix. They also let you know what work was done, so you can feel confident in your purchase.

 

TBM Tunnel Boring Machines: New vs. Refurbished

Cost Comparison

New TBM Tunnel Boring Machines cost a lot more than refurbished ones. New machines can cost over $50 million. Refurbished machines cost much less. This big price gap helps you pick what fits your budget.

You should also think about how you will pay for your TBM. Here are some ways to get money for your machine:

If you want to spend less at first, refurbished TBMs are a smart choice. If you want new technology and have more money, a new TBM is better.

 

Performance & Warranty

Performance is very important when picking a TBM. New TBMs have all-new parts. They work fast and are very reliable. Refurbished TBMs can work well too. How well they work depends on how much fixing was done.

Here is a table to help you compare:

• New TBMs have new parts, so they work their best.

• Refurbished TBMs might have old parts, but some companies fix them to work almost like new.

• How a TBM works in different ground is important for your project.

Robbins has a system to check quality. They give warranties on rebuilt TBMs that are like new ones. This is true if the TBM is made for many projects and meets their rules. Their rebuilt TBMs can last 10,000 hours. All parts are checked to be as good as new.

 

If you want to feel safe, ask about the warranty. Some sellers give strong warranties for refurbished TBMs if they follow strict rules when rebuilding.

 

Availability

Sometimes you need your TBM quickly. New machines take longer to make and deliver, especially if you want special features. Refurbished TBMs are often ready faster. You can find them online or from dealers who have them in stock.

If your project needs to start soon, a refurbished TBM can help you begin fast. If you can wait and want special features, a new TBM may be better.

When Should You Choose Each Option?

• Choose a new TBM if you want the newest technology, high reliability, and custom features.

• Pick a refurbished TBM if you want to save money, need it fast, or have a small project.

Tip: Always pick what matches your project, budget, and schedule. Ask sellers about support and warranty before you buy.

 

Choosing the Right TBM Option

Project Needs & Budget

Each tunnel project is unique. You need a TBM that fits your job and your budget. NHI sells both new and refurbished TBMs. You can get machines for small city tunnels or big country tunnels. NHI has many choices, so you get the right size and power for your work.

When picking a TBM, think about these things:

• What kind of ground is at your site

• The cutterhead design for better digging

• Thrust force and torque for hard ground

• How much maintenance is needed

• Safety rules for your team

• If the TBM is worth the cost

 

Custom Solutions from NHI

NHI can make TBMs just for your project. You can ask for special sizes or extra safety parts. NHI’s team helps you pick a machine that fits your tunnel and your money plan. They give support from start to finish.

 

Supplier Reputation

You want a supplier you can trust. NHI has been around for over 100 years. They own NFM and Robbins, which are big names in TBMs. NHI spends money on new ideas, so you get the latest tech. Their quality checks are strong, and they have worked all over the world.

 

NHI's Industry Leadership

Here’s what makes a supplier great:

NHI has won many awards and has lots of certificates. Their TBMs have set speed and reliability records.

Tip: Always check if the supplier has done big projects. Look for good support after you buy. Ask about service plans and warranties. This helps you avoid problems and keeps your project running.

When you match your project needs with the right TBM and a trusted supplier like NHI, you set yourself up for success. Take your time, ask questions, and choose the option that gives you confidence.

You can find new and refurbished TBM tunnel boring machines in many places. Trusted manufacturers, dealers, and online marketplaces have lots of choices. Refurbished TBMs work well and have set 36% of tunneling world records. Be careful when you shop. Do not skip risk checks. Do not pick the cheapest machine without checking its quality. If you want more information, look at these resources:

Take your time. Compare your choices. Pick the TBM that works best for your project!