The mechanical load testing machine is a physical performance testing instrument used in the field of energy science and technology. The equipment can automatically and continuously monitor the current continuity of the internal circuit of the test component, and test the ability of the component to withstand static loads such as wind, snow or ice.
Frequently encountered faults and solutions for mechanical load testing machines:
- Reasons for the unsteady rotation of the pointer:
There is still gas in the oil cylinder and oil circuit of the testing machine; there are impurities in the oil delivery valve; check whether there is oil leakage in the oil pipe joint.
Drain the gas; clean the inside with kerosene, and refill the oil after cleaning; tighten the oil pipe joint or replace the sealing ring.
- Poor drop of the pendulum:
This phenomenon occurs because the gap between one end of the buffer oil needle tip and a small hole on the oil return valve body is too large or the gap is blocked by impurities; when the sensitive zero of the test is affected, (this phenomenon occurs The reason is that the gap between the steel ball and the ball seat of the oil return valve is too small or the gap is blocked by impurities).
Troubleshooting method: At this time, the conversion handle can be used to adjust the gap. If there are too many impurities, the oil valve should be removed for cleaning; the oil pipe of the dynamometer can be removed, and then the ball seat can be removed with a screwdriver (hollowed out in the middle). The steel ball forces the round pin to deform (if the gap is large, it will be deformed from the reverse round pin) to adjust the gap and try it out. If there are impurities, just wash them off.
- When the pendulum is raised to the limit position, the pointer cannot rotate one circle. Troubleshooting method: Adjust the control screw on the horizontal diaphragm under the square iron of the force-measuring spindle, so that the pointer can rotate a circle and slightly exceed 2%-5% of the load of each level. At this time, the small curved plate on the connecting rod touches the limit switch Finally, the square iron is in contact with the control screw.
- The working oil cylinder is within the specified maximum test force, and the test force cannot continue to rise. Troubleshooting method: Under normal working conditions, when the test force cannot continue to rise suddenly, it is mainly because there is dirt in the piston sleeve in the oil delivery valve, which makes the piston unable to slide normally in the sleeve. When the oil volume needs to be increased, the edge of the conical end of the piston cannot automatically adjust the oil return clearance or the oil delivery valve core is stuck to make the working oil flow back to the oil tank, thus affecting the increase of the oil volume and pressure. The repair method is to unscrew the hexagonal pressure cap behind the oil delivery valve, screw it on the piston with the small screw rod that comes with it, take it out, and clean the inside of the piston sleeve with kerosene, (pay attention to cleaning the groove inside) ), after cleaning, refill the oil and install the piston to tighten the hexagonal pressure cap.