Multi-cylinder cone crushers are high-energy mineral processing equipment that "crushes instead of grinds". However, due to the inevitable inclusion of iron blocks, broken bucket teeth, and other foreign objects in the raw ore during mining, iron overload during operation is straightforward. This will significantly impact and damage the China multi-cylinder hydraulic cone crusher. Therefore, it is essential to optimize the design of the overload protection system.
Multi-Cylinder Hydraulic Cone Crusher Working Principle
The multi-cylinder hydraulic cone crusher machine rotation of the motor is transmitted to the eccentric sleeve through the pulley, transmission shaft, and bevel gear so that the eccentric sleeve rotates around the fixed main shaft. When the eccentric sleeve rotates, the crushing cone supported on the spherical bearing is driven by the eccentric sleeve to swing around the fixed point so that the moving cone liner of the crushing cone in the frame sometimes approaches and sometimes leaves the fixed cone liner fixed on the support sleeve and the adjustment sleeve. Whenever the moving cone liner leaves the fixed cone liner, the material entering the crushing chamber moves downward along the moving cone surface. Whenever the moving cone liner approaches the fixed liner, the material is continuously impacted, squeezed, bent in the crushing chamber, and then crushed. The crushed material is discharged by weight from the crushing chamber from the discharge port.
Multi-Cylinder Hydraulic Cone Crusher Overload Protection System
The overload protection system is an integral part of the multi-cylinder hydraulic cone crushers, and hydraulic cylinders, pipelines, various valve groups, and external hydraulic systems are installed on the equipment. The support sleeve and the frame are assembled through the hydraulic cylinder assembly. The primary function of the hydraulic cylinder is to expand the discharge port when passing iron and clearing the cavity. The hydraulic cylinder system must be responsive and protect the equipment when overloaded to reduce the risk of multi-cylinder hydraulic cone mining crusher damage.
Multi-Cylinder Hydraulic Cone Crusher Protection System Problems
When the multi-cylinder hydraulic cone crusher Indonesia is working, the support sleeve and the frame are tightly pressed together by the spring to offset the upward thrust generated when crushing ore and provide crushing force for the multi-cylinder hydraulic cone rock crusher. The gap between the support sleeve and the frame is adjusted by adjusting the spring, and then the crushing chamber and the discharge port are adjusted. The pressure on the spring also represents the crushing force the multi-cylinder hydraulic cone stone crusher can provide.
Before the multi-cylinder hydraulic cone granite crusher is operated, the hydraulic pump motor is turned on, the reversing valve is switched to the upper position, and the hydraulic oil enters the lower chamber of the hydraulic cylinder through the hydraulic pump. The lower chamber is connected to the support sleeve. After the oil filling, the reversing valve is switched to the middle position.
During the operation of the multi-cylinder hydraulic cone quartz crusher, if there is a situation of iron passing through, the hydraulic oil in the lower chamber of the hydraulic cylinder quickly enters the accumulator so that the piston rod drives the support sleeve to move upward, providing space for the multi-cylinder hydraulic cone river pebbles crusher to pass iron. When the iron block or other difficult-to-crush objects pass through the crusher, the accumulator's hydraulic oil returns to the hydraulic cylinder's lower chamber and the crusher returns to its normal working state. When the crusher is blocked by ore, the reversing valve is switched to the lower position, the hydraulic pump motor is started, the oil quickly returns to the oil tank, and the gap between the support sleeve and the frame is released to facilitate the cavity-clearing operation.
When the system is overloaded, the safety valve in the hydraulic system will work to release oil and pressure from the hydraulic system to reduce the system pressure, thereby playing the role of overload protection and avoiding damage to the system motor. The role of the one-way throttle valve in the system is as follows: After the system over-iron protection is over, the oil will return from the accumulator to the hydraulic cylinder. At this time, the one-way throttle valve is used to control the speed of the oil return to avoid.
Prevent the hydraulic cylinder piston and power cone from resetting too quickly, causing collision and damage to the crusher. When the crusher has iron overload, the hydraulic pressure can soon flow from the hydraulic cylinder end to the accumulator through the one-way throttle valve to achieve a quick response to the system's iron overload protection.
Multi-Cylinder Hydraulic Cone Crusher Protection System Problems
Poor Pressure Holding Performance
The hydraulic system mainly uses the stop valve to seal the oil to achieve continuous crusher operation, but its protection is poor. Since the stop valve adopts the end face sealing design, its sealing is inadequate; it is straightforward to cause internal leakage of oil from the high-pressure end to the low-pressure end, affecting the regular operation of the crusher. When the cone crusher is working, the entire crushing working component will produce significant vibration and impact force, affecting the system's oil pressure. If the stop valve seal fails, it will aggravate the internal leakage of oil in the system, resulting in a decrease in the crushing force of the crusher.
Low Level of Automatic Control
When adjusting the crusher's loading capacity, the system requires coordinated operation by multiple people. Not only do they need to open and close the two stop valves separately, but they also need a dedicated person to check the position of the crushing component from the observation port of the crushing chamber and direct other personnel to adjust the system pressure to meet the preset conditions of the crushing element. If the crushing force cannot meet the equipment's use requirements, the machine must be stopped to re-compress the spring and replenish the pressure on the hydraulic cylinder.
Security Protection Lacks Reliability
The over-iron protection system uses an electric contact pressure gauge to monitor the system's oil pressure. When the crusher has an overload over-iron problem, the crusher will trip and shut down. The crusher has a significant impact force when working, and a sudden trip and shutdown will cause a considerable fluctuation in the system's oil pressure. The electric contact pressure gauge has poor vibration resistance. It is easily affected when it stops due to overload, causing it to lose its working ability, increasing the frequency of overload protection mis operation of the crusher, and affecting its safety, reliability, and work efficiency.
