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Common failures and solutions of pressure testing machines
by：Sinowon
2021-07-19
Common failures and solutions of pressure testing machines
Compression testing machine is a commonly used testing equipment. The equipment is widely used in materials such as rubber, plastic sheets, pipes, and profiles. The equipment has the characteristics of simple operation, stable performance, and safe and reliable use. Some common failures and problems of the pressure testing machine will occur during use. Let me introduce the common failures and solutions of the pressure testing machine in detail. The steel ball and ball seat have scratches and burrs. Remedy: Open the high-pressure oil outlet pipe joint of the oil pump to exhaust. Clean and discharge the air in the oil pump. Replace or repair the corresponding parts. 2. The oil pump delivery is unstable (the pointer can be seen to be stagnant and reciprocating). Reason: oil viscosity is too small (too thin) or too dirty; there is air in the oil circuit. There is dirt or roughness between the bushings of the oil delivery valve piston. There is an oil leak. Remedy: Replace clean oil with suitable viscosity. After removing the air in the oil circuit and raising the piston for a certain distance, open the oil return plug. Clean and grind the napped parts. Find out the oil leak and remove it. 2. Oil pressure pulsation (the oil return pipe of the oil delivery valve is intermittent, and the pointer of the standard dynamometer is jittered when the load value is checked). Reason: There is air in the oil pump. The oil viscosity is too small (too thin). The throttle needle clearance of the fuel delivery valve is too large. There is dirt in the oil pump. The oil outlet valve seat does not match, and the steel ball and ball seat have burrs and scratches. Remedy: Exclude air. Replace with suitable oil. Reduce the throttle needle clearance. Clean the oil pump. Replace or repair the corresponding parts. 3. The oil pressure can not hit the maximum load. Reason: The oil delivery valve and the oil plug are too tight or there is dirt. The spring force of the fuel delivery valve is too small. There is a big oil leak. Oil is leaking from the front end of the oil delivery valve piston. The oil pipe joint is leaking. The working piston clearance is too large. The needle valve of the oil return valve does not match. Remedy: clean or grind corresponding parts. Add a washer on the end of the spring or replace the spring. Eliminate oil spills. Tighten the screw sleeve. Tighten after replacing the gasket. Increase the oil viscosity slightly or replace the piston. Combine the oil return valve. 5\The pointer does not return to zero after unloading. Reason: The rack is stuck. The pendulum rod fell back too fast to make the rack jump out of the wheel. Remedy: adjust the spring leaf. Re-engage the rack. Rotate the rack to zero. The above are the common failures and solutions of the pressure testing machine for everyone. I hope to help you,
Previous: WE-1000D Digital Display Hydraulic Universal Testing Machine
Next: Which industries are the electronic universal testing machines suitable for?
Compression testing machine is a commonly used testing equipment. The equipment is widely used in materials such as rubber, plastic sheets, pipes, and profiles. The equipment has the characteristics of simple operation, stable performance, and safe and reliable use. Some common failures and problems of the pressure testing machine will occur during use. Let me introduce the common failures and solutions of the pressure testing machine in detail. The steel ball and ball seat have scratches and burrs. Remedy: Open the high-pressure oil outlet pipe joint of the oil pump to exhaust. Clean and discharge the air in the oil pump. Replace or repair the corresponding parts. 2. The oil pump delivery is unstable (the pointer can be seen to be stagnant and reciprocating). Reason: oil viscosity is too small (too thin) or too dirty; there is air in the oil circuit. There is dirt or roughness between the bushings of the oil delivery valve piston. There is an oil leak. Remedy: Replace clean oil with suitable viscosity. After removing the air in the oil circuit and raising the piston for a certain distance, open the oil return plug. Clean and grind the napped parts. Find out the oil leak and remove it. 2. Oil pressure pulsation (the oil return pipe of the oil delivery valve is intermittent, and the pointer of the standard dynamometer is jittered when the load value is checked). Reason: There is air in the oil pump. The oil viscosity is too small (too thin). The throttle needle clearance of the fuel delivery valve is too large. There is dirt in the oil pump. The oil outlet valve seat does not match, and the steel ball and ball seat have burrs and scratches. Remedy: Exclude air. Replace with suitable oil. Reduce the throttle needle clearance. Clean the oil pump. Replace or repair the corresponding parts. 3. The oil pressure can not hit the maximum load. Reason: The oil delivery valve and the oil plug are too tight or there is dirt. The spring force of the fuel delivery valve is too small. There is a big oil leak. Oil is leaking from the front end of the oil delivery valve piston. The oil pipe joint is leaking. The working piston clearance is too large. The needle valve of the oil return valve does not match. Remedy: clean or grind corresponding parts. Add a washer on the end of the spring or replace the spring. Eliminate oil spills. Tighten the screw sleeve. Tighten after replacing the gasket. Increase the oil viscosity slightly or replace the piston. Combine the oil return valve. 5\The pointer does not return to zero after unloading. Reason: The rack is stuck. The pendulum rod fell back too fast to make the rack jump out of the wheel. Remedy: adjust the spring leaf. Re-engage the rack. Rotate the rack to zero. The above are the common failures and solutions of the pressure testing machine for everyone. I hope to help you,
Previous: WE-1000D Digital Display Hydraulic Universal Testing Machine
Next: Which industries are the electronic universal testing machines suitable for?
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