Electronic universal testing machine loading and attention points

Electronic universal testing machineLoading and note points

1. The oil pressure system has severe oil leakage. The oil leakage in the oil circuit system is generally at the coupling of the buffer valve, oil return valve, oil supply valve, oil pump and pipeline. Just tighten the screws after adding pads. If the sealing gasket is broken, it must be removed here to convert the new one. The gaskets should be made of copper or aluminum alloy.

2. The fuel tank oil volume is lacking. When loading to a certain load, there will be "puff" and "puff" movements in the oil return pipe of the oil supply valve, and there will be less oil and bubbles. When the load cannot rise any further, no oil flows out of the return oil pipe. Cleaning method: Recharge oil into the oil tank of the experiment engine until the oil level reaches halfway through the oil viewing window.

3. The oil collector of the oil pump is not pressed on the pump body. In this way, each load can only reach the certain load, and the load cannot rise any further, and there is no oil flowing out of the oil supply valve return pipe. Cleaning method: Use a wrench to tighten the fixing screws at the rear end of the oil pump. If you still have any questions, remove the oil collector and add a gasket between the oil collector and the pump body.

4. The cooperative gap between the operating piston and the oil cylinder is too large and there is too much oil spill, which can be seen from the oil spill and other outlets. The method is to thicken the viscosity of the oil. Assuming that the doubt cannot be handled, after passing the precision measurement, you should go to the consumer factory to exchange the piston and oil cylinder.

5. The viscosity of oil is too low (the oil is constantly flowing out of the oil return pipe of the oil supply valve when loading). Generally, mineral oil of medium viscosity is used, which does not contain water, acid and other mixtures, does not form at room temperature, and does not thicken. If necessary, you can use a viscometer to measure it. If the oil is used inappropriately, it will cause the valve and oil circuit to be blocked and may cause oscillation or pipeline leakage. The electronic universal testing machine should use oil according to the instructions.

6. The gap between the force-measuring piston and the force-measuring cylinder is large. When it reaches a high tonnage, it can be seen from the lower part of the force-measuring cylinder. Normally, there is no oil drop or intermittent drops when there is high tonnage. Assuming it flows out in a linear manner, it means that the force-measuring piston should be converted. When observing oil leakage, you should pay attention to the difference between oil leakage at the joint and oil leakage at the cylinder plug, and you should not make a mistake by mistake.

7. The piston and piston sleeve in the oil supply valve are damaged or the spring becomes soft. In this way, the load base that can be reached by each load remains unchanged, and the oil supply valve is noisy. When the load cannot rise, the oil output of the oil supply valve returns the oil pipe is large. The piston and piston sleeve should be removed and ground. If the damage is severe, the spring should be converted.
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