Working process of overload protection for jaw crusher hydraulic system

2020-03-10

The hydraulic system overload protection of jaw crusher is to automatically adjust the oil injection quantity according to the small amount of oil leakage in the hydraulic system. The working cylinder uses bolts to limit the position of the limit elongation, which overcomes the impulse of the moving jaw to the hydraulic system oil pressure and is convenient for the adjustment of the ore discharge port. In the working process of Hongxing heavy industry machine, through the rotation of cam device, the plunger type fuel injection pump is driven to supply high-pressure oil to the system. Then, the working process of hydraulic system overload protection of jaw crusher is as follows:
 
 
 
1. Normal operation: in normal operation, the pressure of the thrust plate of jaw crusher acting on the working cylinder is lower than the thrust of the hydraulic cylinder, the action valve is at the upper limit position, the thrust plate does not move, and the jaw crusher can crush materials normally.
 
 
 
2. Overload protection: when the crushing chamber of jaw crusher enters into the non crushing object, the crushing force increases, the pressure of thrust plate of jaw crusher acting on the working cylinder is higher than the thrust provided by the hydraulic cylinder, the oil pressure in the high-pressure oil chamber of the working cylinder increases instantaneously, the throttle valve makes the action valve operate, the system (hydraulic cylinder) releases oil, limits the thrust of thrust plate and protects the machine.
 
 
 
3. Troubleshooting: after the non broken material enters the crushing chamber, due to the limitation of the thrust provided by the working cylinder, the piston moves to the right and retracts, correspondingly, the ore discharge opening of the jaw crusher increases, and the non broken material is discharged from the ore discharge opening due to the engagement of the jaw of the crusher and the gradual downward movement of the non broken material, thus automatically removing the non broken material in the crushing chamber.
 
 
 
4. Automatic recovery: when the non broken objects are removed automatically, the piston is in the retracted position. Due to the reduction of crushing force, the operating valve restores its valve core to the upper limit position without the instantaneous high pressure in the upper chamber, and no longer discharges oil to the system. At the same time, under the effect of oil pressure regulating device, the plunger type fuel injection pump pumps oil to the system with a large amount of pump oil until the piston of the working cylinder moves to the left limit Location. So far, the jaw crusher returns to normal working condition.
 
As a supplier with nearly 30 years' manufacturing, Shuguang Heavy Machinery also produces and sells hammer crushers, impact crushers, vertical shaft crushers, cone crushers, compound crushers, Raymond mills, high pressure mills. Powder machine, vertical mill, ultra-fine grinding machine, ball mill, double-shaft shredder and other heavy equipment crusher. Feel free to contact us for more details.
 
Factory Address: Longjiang West Road, Shangjie District, Zhengzhou City
Contact number: +86-371-67666660 676667
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