company news about Introduction to common failures of hydraulic universal material testing machine

Introduction to common failures of hydraulic universal material testing machine

1. The reason why the piston does not rise:
1. The motor is reversed; 2. The oil delivery valve is not opened or the oil return valve is not tightened; 3 The oil delivery piston is ground to death
Elimination method for piston not rising:
1. Exchange the three-phase power wiring; 2. Close the oil return valve and open the oil delivery valve; 3. Repair or replace parts

2. Reasons for unstable oil delivery of the oil pump:
1. There is air in the oil circuit; 2. The viscosity of the oil is too high or too thin or too dirty; 3. There is leakage
Elimination method of unstable oil delivery of oil pump:
1. Repeatedly drive up and down the piston; 2. Replace hydraulic oil with suitable viscosity; 3. Find out the leaking oil and remove it

3. Reasons for the oil pressure not reaching the maximum load:
1. The buffer piston is dead or there is dirt; 2 the oil viscosity is not enough; 3. There is oil leakage; 4. The oil return switch lever does not match the valve port 
Elimination method for oil pressure not reaching the maximum load:
1. Clean or grind corresponding parts; 2. Replace hydraulic oil with higher viscosity; 3. Eliminate oil leakage; 4. Grind and tighten the oil return needle

Fourth, the reason why the oil pump does not start:
1. The piston limit switch is not closed; 2. The overload protection switch is not closed
Elimination method of oil pump not starting: 
1. Check the piston limit switch; 2. Check the connection plug

5. Reasons for pointer jitter:
1. The oil pump does not suck oil smoothly; 2. The air in the hydraulic system; 3. Insufficient oil supply
How to eliminate pointer jitter:
1. Use the tool hook to move the one-way valve spring to work; 2. Loosen the air screw to release the air; 3 Load 80% of the full load with oil pressure and cycle several times

6. Reasons for intermittent pointers:
1. Dust and dirt on copper wheels, aluminum rods or slides; 2. The bearing does not work well
Elimination method of intermittent pointer: www.lyxyantech.com
1. Clean and remove dust; 2. Clean and remove dust and replace bearings

Seven, the serious reasons for the out-of-error indication:
1. The installation is not level; 2. There is friction in the guiding and lifting parts
Exclusion method for serious indication value out of tolerance:
1. Adjust the installation level of the host and dynamometer; 2. Eliminate friction

8. Reasons for lifting failure:
1. Circuit failure; 2. Mechanical transmission failure
Elimination method of lifting failure:
1. Check the power connection line; 2. Check and repair the gap of the chain drive pair

9. Reasons for failure of hydraulic clamping:
1. Hydraulic system failure; 2. Mechanical part failure
Elimination method of hydraulic clamping failure:
1. Troubleshoot the hydraulic system; 2. Troubleshoot the mechanical part

10. Reasons for leakage of hydraulic system:
1. The hydraulic system joint is loose; 2. The seal is damaged and invalid

Elimination method of hydraulic system leakage:
1. Fasten the joint; 2. Replace the seal