cone crusher hydraulic pressure

what is a hydraulic cone crusher? - hongxing machinery

When the cone crusher works, the rotation of the motor is performed by a pulley or coupling, the cone crusher transmission shaft and the crusher cone under the force of an eccentric sleeve to make a swing motion around a fixed point. Therefore, the crushing wall of the crushing cone is sometimes close to and sometimes away from the surface of the mortar wall fixed on the adjusting sleeve, so that the ore is continuously impacted, crushed and bent in the crushing cavity to achieve the ore crushing. The motor drives the eccentric sleeve to rotate through the bevel gear to make the crushing cone rotate, which accomplishes the crushing work when the crushing cone is sometimes near and away from the fixed cone. The connection between the support sleeve and the frame is compressed by a spring so that when an unbreakable object such as a metal block falls into the crusher, the spring will compress and deform to evacuate these objects and achieve insurance to prevent the machine from damaging. If the foreign matter is stuck in the ore discharge, it can be solved by expanding the discharging port and then the cone crusher is automatically reset by the spring to resume normal work.

This hydraulic system controls the movement of 3 basic circuits. One is the action of the fixed cone hydraulic locking hydraulic cylinder, the second is the hydraulic motor that adjusts the gap between the moving and fixed cone. The third is the way of the hydraulic cylinder when the iron is released and cleaned. The lock cylinder is installed between the lock ring and the adjustment ring. It can support the lock ring located on the upper part of the adjustment ring to ensure that the fixed cone is located in the broken position in the adjustment ring when the hydraulic cylinder is pressurized during the crushing process. When the gap between the moving and fixed cones needs to be adjusted, the pressure of the locking hydraulic cylinder is released, and the motor on the adjusting ring starts to start. The gear on the motor engages the driving ring with the adjusting cap to realize the automatic adjustment.

The iron release cylinder is connected to the lower part of the mainframe and is fixed with the adopt to overcome the normal braking force. Abnormal operation or excessive crushing force generated by the foreign object as it passes through the crusher cause the adjustment ring to rise. Once the overload disappears or iron passes through the crusher, the crusher returns to normal. Besides, to clean the crusher, the adjustment ring needs to be removed from the mainframe.

This hydraulic system uses a fixed displacement plunger pump as the power source, that is to say, it converts the mechanical energy supplied by the prime mover into the pressure energy of the working medium (hydraulic oil). During this period, each hydraulic valve controls and regulates the pressure, flow, and direction, to ensure that the execution part (each hydraulic cylinder and motor) to complete the predetermined law of movement. The maximum pressure of the electromagnetic relief valve adjustment system in this circuit is 20MPa. The locking circuit is controlled by accumulator pressure and zero leakage solenoid valve. Because the lock cylinder is always in a pressure-maintaining state during the working process, the use of an accumulator to maintain pressure can prevent the plunger pump from starting and stopping frequently. The locking cylinder is a plunger cylinder so that the zero-leakage solenoid valve is reset by the weight of the support part after the pressure is released.

Adjust the motor circuit by using a shuttle valve to control the motor running and stopping. Due to the working nature of the host, the motor needs to have a brake function. Therefore, the shuttle valve is used to control the brake of the motor. Thus, the motor can realize the function of oil-braking and oil-cut braking. Accumulators are used to absorbing shocks in the iron release and cleaning circuits. Due to abnormal operation or excessive crushing force generated by the crusher when the main machine is working, the adjustment ring rises upward. When the adjustment ring rises, the hydraulic oil in the upper cavity of the hydraulic cylinder will be squeezed into the accumulator, then the nitrogen in the accumulator is compressed. After that, the compressed nitrogen forces the hydraulic oil to return to the hydraulic cylinder, and the piston rod of the hydraulic cylinder is retracted, and the adjustment ring is returned to the original position. This circuit uses an accumulator to absorb shocks easily, easily and reliably.

The most common types of hydraulic cone crushers are single-cylinder cone crusher, multi-cylinder cone crusher, and fully hydraulic crusher.SCseries single-cylinder hydraulic cone crusher is developed with advanced crushing technology, integrating mechanical, hydraulic, electrical, intelligent control, etc.Thesingle-cylinder hydraulic cone crusherhas a new crusher structure, optimized laminated crushing cavity type, and a fully intelligent automation control system. In general, itcan be widely used in medium crushing, fine crushing, and ultra-fine crushing operations.

Multi-cylinder hydraulic cone crusher is suitable for crushing various ores and rocks with medium or higher hardness, such as limestone, iron ore, cobblestone, non-ferrous metal oreand so on.Its high speed, high crushing capacity, and unique patented design make the crushed finished producta high-quality cube shape, and the easy maintenance feature can ensure its high stability operation.

The full-hydraulic cone crusher is a new cone crusher that combines advanced multi-cylinder hydraulic cone crusher and PSG cone crusher. This machineadopts advanced design concepts and is optimized and designed. The fine-grained content in the crushed product is higher, and the content of the granules smaller than the closed-side discharge can reach 80%, which can significantly improve the processing capacity of subsequent processes and reduce comprehensive energy consumption.

The successful combination of high-performance crushing cavity type and high crushing frequency has greatly improved the processing capacity of the machine. Due to the principle of lamination crushing, the crushed products are mostly cubic structures, which greatly reduces needle-shaped materials.

cone crusher - tips of operation and regular maintenance | hxjq

During the using process, if the worker operates and maintains the crusher according to correct standards, it will have great significance in normal production, output, quality, service life, working efficiency and the prevention of accidents, etc.

At present, the common cone crushers are mainly the single toggle cone crusher and compound cone crusher (Symons cone crusher). Although both types of cone crushers are totally different, they have the same operation procedure.

The operation procedure of cone crusher can be divided into four stages: before the start, at start-up, at run time and turning-off time. All conditions should be paid attention in each stage, and the potential problems can be found and solved timely and the service time can be prolonged.

Turn on the lubricating oil pump to run for three to five minutes. After everything runs well, turn on the crusher as required. After the crusher idles for one to two minutes, confirm that all things are well, and feed the rocks or stones.

During the crushing process, there is a great impact on the concave which makes the filled zinc layer be out of shape. Therefore, the U-type bolt should be tightened frequently to make the concave fix and avoid concave from deformation.

The mantle is fixed by the upper bolt of the main shaft. The looseness of the bolt can make the mantle unstable, even the filled layer may fall off to cause downtime. Hence, the bolts should be often checked and fixed to avoid looseness.

The spherical bearing should be installed in the borehole of crusher closely. After a long period of working, the tightness of crusher' parts can be broken. The tightness of spherical bearing must be checked frequently, and the oil gallery of the spherical bearing should be kept clean.

Water seal is the equipment for preventing crusher from dust, which is very important to the normal operation of cone crusher. Therefore, daily maintenance and checking its integrality are very necessary.

Through the study of this article, you must have a deeper understanding of the operation and maintenance of the cone crusher. In the case of the above-mentioned failure of the crusher, the problem is analyzed and solved by referring to the method given in this article.

cone crushers | mclanahan

A Cone Crusher is a compression type of machine that reduces material by squeezing or compressing the feed material between a moving piece of steel and a stationary piece of steel. Final sizing and reduction is determined by the closed side setting or the gap between the two crushing members at the lowest point. As the wedge or eccentric rotates to cause the compression within the chamber, the material gets smaller as it moves down through the wear liner as the opening in the cavity gets tighter. The crushed material is discharged at the bottom of the machine after they pass through the cavity.

A Cone Crusher will deliver a 4:1 to 6:1 reduction ratio. As we set the closed side setting tighter to create a finer output, we also reduce the volume or throughput capacity of the machine. Generally speaking, multiplying the closed side setting by two is a good guide to the top size of the gradation exiting the machine.

The technology that makes a MSP Cone Crusher outperform competitive cones on the market is the combination of all of the factors of performance i.e. balanced eccentric, higher speeds, fulcrum point position, and stroke. By using sound engineering with years of field testing a truly tried and tested new Cone Crusher has emerged.

A balanced eccentric coupled with a fulcrum point ideally placed over the crushing chamber yields highly effective compression crushing. This allows higher eccentric speeds to maximize performance without disruptive forces. The eccentric stroke is designed to work with the eccentric speed and fulcrum position to produce higher yields and minimize recirculating loads. The torque and resultant crushing forces are as effective as virtually any Cone Crusher on the market.

Spiral bevel gears provide the turning force to the eccentric. The spiral gear is mounted on a sturdy countershaft of the Cone Crusher, which rides in bronze bushings. The gears are precision cut for quiet operation. Misalignment problems are eliminated.

The MSP Cone Crusher features one of the largest volume displacements by a crusher head. When there is a large volume of material displaced this way, it means that more material is crushed in each cycle, more material can be fed to fill the larger void left when the crushing head recedes, and more material flows through the crusher due to the larger throughput and gyrating cycles allowing material to drop further. The benefits of high efficiency, greater crushing force and high capacity coupled with the durability the market expects are the reasons why this design is the best way to increase your productivity and profitability.

Sleeve bearings make removal and installation of the MSP Cone Crusher head and main shaft simple. The tapered main shaft fits into a large opening at the upper end of the tapered eccentric bushing. The shaft does not require precise alignment. It can be inserted from a vertical position and will self-align.

With the MSP Cone Crushers automatic hydraulic overload relief system, the crusher immediately opens in the event of an overload. This action reduces the crushing pressure, allowing the obstruction to pass through the chamber. After the chamber has been cleared, the hydraulic control system automatically returns the crusher to its original setting. Shock loads on the crusher are reduced for longer component life.

MSP Cone Crushers are built to make your operations run more smoothly and easily. Its simple and easy to read control panel provides you with the necessary information to properly run your crusher. For example, the MSP Cone Crusher shows you the exact cone setting to allow the operator to stay on top of a critical set point.

To enhance your Cone Crusher's life and maintain optimal crushing capacities, an automatic liner change reminder is included for your convenience. When the new mantle and liners are installed, the automated reminder is reset. As the crusher operates, the system will track production capacities and calculate the liner wear rate. When the cone liners reach the maximum wear point, it sends a flashing reminder to 'change cone' on the cone setting meter. After the wear parts are changed, simply reset the automated reminder system and continue efficient, reliable crushing.

The MSP Cone Crushers are built heavier than most competitive Cone Crushers. The extra weight means lower stress on the machine, which results in longer operational life. There is no question that the proper use of mass makes for more durable crushers. Additionally, a broad array of manganese liners is offered for each size MSP Cone. A unique and patented feature allows the Liners to fit without the use of any backing material. Improved Chamber matching with crusher feeds virtually eliminates any trial and error.

All these factors combine to give producers more effective compression crushing. This reduces liner wear, which reduces wear cost and allows higher yields, resulting in decreased overall cost per ton of finished product.

In the Symons principle, which is utilized by the MSP Cone Crusher, each cycle is timed so that the feed material and the upward thrust of the crushing head meet at the moment of maximum impact. The optimum speed of gyration and the large eccentric throw produce two important results: 1) the rapidly closing head catches the falling feed material and delivers the extremely high crushing force and 2) on the other side of the chamber the rapidly receding head allows material to fall freely to the next point of impact or exit the chamber. The combination of superior crushing force and free flow of material in the MSP Cone Crusher results in production levels that are unsurpassed and means lower power consumption per ton.

Ten years of testing went into the final combination of speed, stroke, and head angle to deliver the most efficient use of power. Greater efficiency delivers lower power consumption, reduced cost per ton, less maintenance and higher profits.

The power input imparted by the driven eccentric results in a bearing force in opposition to the crushing force at a point on the lower portion of the main shaft. The bearing force as it is transmitted to the main shaft provides the required moment to crush the rock. The distance between the bearing force and the fulcrum point is called the force arm. The longer the force arm, the greater the momentum, which produces a greater crushing force.

Crushing loads are distributed over a large spherical bearing. The socket liner keeps full contact with the crushing head ball and carries all of the vertical component and part of the horizontal. The long force arm, represented by the main shaft, reduces the load transmitted through the eccentric bushing.

Capacities and product gradations produced by Cone Crushers are affected by the method of feeding, characteristics of the material fed, speed of the machine, power applied, and other factors. Hardness, compressive strength, mineral content, grain structure, plasticity, size and shape of feed particles, moisture content, and other characteristics of the material also affect production capacities and gradations. Gradations and capacities are most often based on a typical, well-graded choke feed to the crusher. Well-graded feed is considered to be 90% to 100% passing the closed side feed opening, 40% to 60% passing the midpoint of the crushing chamber on the closed side (average of the closed side feed opening and closed side setting), and 0 to 10% passing the closed side setting. Choke feed is considered to be material located 360 degrees around the crushing head and approximately 6 above the mantle nut. Maximum feed size is the average of the open side feed opening and closed side feed opening.

Minimum closed side setting may vary depending on crushing conditions, the compressive strength of the material being crushed, and stage of reduction. The actual minimum closed side setting is that setting just before the bowl assembly lifts minutely against the factory recommended pressurized hydraulicrelief system.

Overall, industry acceptance of the Symons principle and performance, the McLanahan Cone Crusher works to deliver lower recirculating loads at higher tonnage rates with lower maintenance costs by combining:

A general rule of thumb for applying Cone Crushers is the reduction ratio. A crusher with coarse style liners would typically have a 6:1 reduction ratio. Thus, with a 34 closed side setting, the maximum feed would be 6 x 34 or 4.5 inches. Reduction ratios of 8:1 may be possible in certain coarse crushing applications. Fine liner configurations typically have reduction ratios of 4:1 to 6:1.

The difference between the volume displaced by the crushing head when it is fully closed and fully open is called the displacement volume. A large displacement volume results in greater capacity because:

In order to maintain the maximum levels of capacity, gradation, and cubical product, a Cone Crusher must be choke-fed at all times. The best way to keep a choke-feed to the ConeCrusher is with a surge bin (or hopper) and feeder that are located prior to the crusher. Choke-feeding is almost impossible to achieve without a hopper and feeder.

There are a number of different criteria to consider when selecting the right chambers for your crushing needs. However, the one that must always be considered isthat you have a well-graded feed to the chamber. A well-graded feed is generally thought to be 90 to 100% passing the closed-side feed opening, 40 to 60% passing the midpoint, and 0 to 10% passing the closed-side setting.

One thing you should never do is place a new concave liner in a crusher with a worn mantleor place a new mantle in a crusher with a concave liner. Why? If you have properly selected the replacement component, you will change the complete profile of the Cone Crusher by mating new and worn components. The receiving opening will tend to close down, restricting the feed from entering the chamber and causing a reduction in tons per hour.

If the liner is wearing evenly throughout the chamber, you should consider changing out the manganese when it has worn down to about 1" (2.5 cm) thick at the bottom. At about 3/4" to 5/8" (1.9 to 1.6 cm) thick, the manganese will crack, causing the backing material to begin to disintegrate. This, in turn, will cause the liners to break loose. If this should happen, continued operation could destroy the seat on the support bowl or the head of the Cone Crusher.

McLanahan Symons Principle (MSP) Cone Crushers utilize a combination of improved factors of performance, which are enhanced by the Symons Principle of crushing, as well as the latest hydraulic features and electrical features that create a modern, efficient, reliable and durable Cone Crusher that ultimately leads to a faster ROI. MSP Cone Crushers are designed to make your operation run more smoothly and easily, as well as ensuring lower operating costs and minimal downtime so that MSP Cone Crushers are more frequently fully operational and processing optimal amounts of material.

Efficiency can be defined by the ratio of the work done by a machine to the energy supplied to it. To apply what this means to your crusher, in your reduction process you are producing exactly the sizes your market is demanding. In the past, quarries produced a range of single-size aggregate products up to 40 mm in size. However, the trend for highly specified aggregate has meant that products have become increasingly finer. Currently, many quarries do not produce significant quantities of aggregate coarser than 20 mm; it is not unusual for material coarser than 10 mm to be stockpiled for further crushing.

14 cone crusher common problems and how to fix them | m&c

Cone crusher has high crushing ratio, high efficiency, low energy consumption, uniform product size, suitable for medium crushing and fine crushing of various ores and rocks. In the cone crusher working process will encounter a variety of problems, So, we provides 14 common fault causes and solutions!

Table of Contents 1. The oil temperature is too high.2. Oil temperature and pressure rise.3.Oil pressure is low after oil pump is started4.Oil contain lots of fine mud and impurities.5.There is water in the oil6.The vibration of cone crusher is too strong.7. The crushing cone rotates very high.8. The sudden speed of the moving cone accelerates.9. Non-uniform rotation of transmission shaft10. Make splitting sounds.11. The coupling rotates and the crusher does not move.12. The drive shaft produces a strong knock.13. The supporting ring jumps.14. The size of ore discharging increases.

Cause: The quality of the oil is poor or the oil is insufficient; the bearing is damaged; the ambient temperature is high, there is no cooling water or the cooling water pressure is low; the cooler is clogged. Solution: change oil or refuel; change bearings; supply cooling water or increase the pressure of cooling water; clean the cooler.

Causes: water enters the lean oil station; the cooler leaks, and the water pressure is greater than the oil pressure; water supply too much or the return pipe is blocked. Solutions: Clean oil tank and replace oil; repair leakage or replace cooler, reduce water pressure, clean oil tank and replace oil; adjust water supply or clean water return pipe, clean oil tank and replace new oil.

Causes: Cone crusher base is loosening; Difficult-to-break materials enter the crushing chamber, leading to blockage; parts break or wear; poor lubrication makes the spindle tightened by bushing. Solutions: fastening bolts, pouring; controlling the type of feed, strictly forbidding the entry of non-fragments; strictly controlling the amount of feed; stopping the machine to check accessories; replacing damaged parts, repairing oil pumps and pipelines.

Causes: oil shortage or dust in oil between spindle and bushing; insufficient clearance of tapered bushing; wear or manufacturing reasons of bowl bearing bush, contact surface deep to inner circle, conical body sinking. Solutions: overhaul or replace bushings, spindles, etc., and find out the causes of oil shortage, eliminate it; adjust bushing clearance; re-scrape, and meet the requirements.

Causes: serious wear or damage of gears; damage of connection keys; breakage of spindle. Solutions: stop and replace gears, and make meshing clearance meet the requirements; change the connection keys; change the spindle, strengthen iron removal work.

380x cone crusher. Raised to clear to empty out it wont come back down. The open/ close switches work along with clear button. So hyd works. Turn on delivery belt and pull the lube/ hyd button to bring cone down. hyd wont engage. Changed the contacts on the pull button. Nothing. Swap soil nods no go.

The cone crusher can not be restarted immediately when it stops suddenly, so as to avoid secondary damage to the cone crushing production line. First of all, you should find out the reasons for the sudden stop of the cone crusher, there are 5 common reasons:

1. The discharge port of the cone crusher is blocked, too much or uneven feeding will lead to the blockage of the discharge port, resulting in excessive production load of the crushing machine, resulting in the fracture of the fuse and lead to shutdown.

2. Sudden shutdown may also be caused by too low or too high voltage, unstable voltage or easily forcing the cone to break self-protection resulting in shutdown. So be sure to check whether the voltage is normal before turning on.

3. It may be the eccentric shaft problem, the eccentric shaft fixed bushing loose or falling will lead to no gap between the bearing housing and the frame, resulting in the eccentric shaft can not operate, so the cone crusher will stop suddenly.

First of all, before starting up, check to see if there is any residue in the tapered discharge opening, clean it up immediately, and pay attention to control the feeding evenly, not too much or too little.

The second is whether the belt tightness is appropriate, reasonable adjustment to prevent too tight or too loose. In addition, pay attention to the voltage situation to maintain the stability of the voltage.