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Hydraulic Valve In Construction Waste Crusher

Failure Analysis And Maintenance Techniques Of Hydraulic Valve In Construction Waste Crusher

With the prolongation of the use time of the hydraulic valve of the Construction Waste Crusher, it is inevitable that the failure or failure occurs. The failure or failure of the hydraulic valve of the Construction Waste Crusher is mainly caused by the large gap of the fit, the leakage of the hydraulic valve of the Construction Waste Crusher and the failure or clamping of the spool of the hydraulic valve of the Construction Waste Crusher due to the wear and cavitation and other factors.

Common Fault Of Construction Waste Crusher Hydraulic Valve

Overflow Valve Failure

1, The System Pressure Fluctuations

  • Cause: The hydraulic oil is not clean, the screw is loose and the spool is not moving smoothly.
  • Remedy: Regular cleaning of the tank, fastening screws.

2, The System Pressure Can Not Be Added

  • Reason: spool orifice blocked, poor assembly quality, spring damage to the spool is not reset.
  • Remedy: Clean the orifice, replace the spring.

3, System Pressure Rise Is Not High

  • Reason: spool wear, there is leakage.
  • Remedy: Replace the spool.

4, A Sudden Increase In Pressure Or Pressure Suddenly Dropped

  • The reason: spool action is not sensitive, plug the orifice blocked.
  • Remedy: Clean the valve body and orifice.

Reversing Valve Failure

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1, The Spool Can Not Be Moved

  • Reason:1, the spool surface is scratched and the valve core is blocked. 2, valve core and valve body inner hole improper clearance, gap large spool easily skew, valve core card die; small clearance valve core resistance large, the valve core can not move. 3, the spring is too soft to push the spool; the spring is too hard and the valve core is not put in place. 4, the electromagnet is damaged.
  • Elimination method: restore the valve core or replace the valve core; check the fit gap; change the spring.

2, The Coil Of The Electromagnet Is Burnt Out

  • The reason: the electromagnet is damaged; the viscosity of the oil liquid is too large; the outer coil is exposed, the short circuit is burned and the voltage is too high.
  • Elimination method: replace electromagnet; filter oil or replace hydraulic oil; wrap the external coil, change the electromagnetic coil; adjust the voltage.

3, External Leakage

  • Cause: the seal ring is damaged; the screw is loose.
  • Elimination method: replace seal ring, fastening screw.

Repair Method Of Construction Waste Crusher Hydraulic Valve

When the hydraulic valve of the Construction Waste Crusher fails or fails, most enterprises restore the function of the hydraulic system by replacing new components, and the cracked hydraulic valve becomes useless. In fact, most of the parts of these Construction Waste Crusher hydraulic valves are still in good condition and can be restored by local maintenance.

Construction Waste Crusher of hydraulic valve repair is not just acquisition cost saving device, when the breaker failure of the hydraulic valve needs no spare parts or to order for a long time, but long-term shutdown device may therefore be temporarily maintained through the maintenance of equipment and the whole production line to run its economic benefits is considerable. In the maintenance practice of the hydraulic valve of the Construction Waste Crusher, the commonly used repair processes include the cleaning of the hydraulic valve of the Construction Waste Crusher, the combination of parts and the repair size, etc. The following is as follows:

Cleaning Of Construction Waste Crusher Hydraulic Valve

Disassembly and cleaning is the first working procedure for the maintenance of the hydraulic valve of the Construction Waste Crusher. For hydraulic oil pollution caused by oil pollution deposition or hydraulic oil granular impurities caused by hydraulic failure of the Construction Waste Crusher, removal and cleaning can generally eliminate failures, restore the function of Construction Waste Crusher Hydraulic Valve. Common cleaning processes include:

  • 1, dismantling. Although most of the parts of the hydraulic valves of the Construction Waste Crusher are connected by bolts, the hydraulic valves of the Construction Waste Crusher are designed for non disassembly. If there is no special equipment or professional technology, forced dismantling is likely to cause damage to the hydraulic valves of the Construction Waste Crusher. Therefore, before disassembly, the structure of the hydraulic valve of the Construction Waste Crusher and the connection mode between the parts should be mastered, and the position relation between the parts should be recorded when dismantling.
  • 2, check and clean up. Check dirt and deposit of valve body and spool. Without damaging the working surface, we should use cotton yarn, brush and non-metal scraper to remove concentrated dirt.
  • 3, rough washing. The body, the valve core and other parts are placed on the tray of the cleaning box and heated to soak. The compressed air is put into the bottom of the cleaning tank, and the residual dirt is cleaned by the agitation of the bubble, and the ultrasonic cleaning can be used conditionally.
  • 4, fine washing. The cleaning liquid is cleaned with high pressure, and the hot air is dried at the end. Conditional enterprises can use existing cleaning agents, and some occasions can also use organic cleaning agents such as diesel and gasoline.
  • 5, assembly. According to the assembly of the assembly relation of the parts which are recorded during the assembly of the hydraulic valve of the Construction Waste Crusher or when it is disassembled, the assembly should be careful when assembling, and do not hurt the parts. The original sealing materials are easily damaged in disassembly and should be replaced when they are assembled.

Part Combination Selection And Maintenance Method

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Construction Waste Crusher hydraulic valve manufacturing process, in order to improve the assembly precision multi use matching method, which has finished processing a batch of parts, such as the valve body and valve according to the actual size gap with the most appropriate pair of assembly, to ensure a good spool sliding and sealing performance.

That is to say, the same type of Construction Waste Crusher hydraulic valve, the valve core and valve body size of a certain difference. For enterprises, when all the number of hydraulic valves of a failure Construction Waste Crusher is large, all valves can be disassembled, cleaned, checked and measured, and the parts can be classified according to the test results, and then recombined and selected according to the following methods.

After checking if the valve core and the valve body is uniform wear, work surface without serious scratch or local severe wear, according to the manual, select the valve core and the valve body with appropriate clearance re assembly; if the valve core and the valve body of uneven wear or scratch the surface of the work.

By the above method has been unable to restore the broken machine function of hydraulic valve is selected to meet the requirements of the amount of interference allowance on the valve core and the valve body (pore size small body and large diameter, the valve spool) hole reaming or grinding, grinding on the spool, with reasonable accuracy to shape accuracy after assembly.

The equipment manager should be familiar with the structure and working principle of the hydraulic valve of the Construction Waste Crusher, plus the accumulation of ordinary experience, so as to cope with the failure of the hydraulic valve of the Construction Waste Crusher flexibly. When the hydraulic valve of the Construction Waste Crusher is malfunction, do not replace it blindly, if some valves can be repaired, it can save the cost of replacing the accessories for the enterprise.

Construction Waste Crusher
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