The pressure gauge fatigue test-bed is prone to some faults after long-term use, and most of the faults can be self checked and handled through troubleshooting. Let's talk about the fault from the aspects of pressure.
Fault 1: pressure does not go up during use
1. This kind of fault is common in the inspection. The reason why the pressure does not go up is usually because there are impurities in the instrument during refueling. After the impurities enter the oil cylinder, the surface of the oil cylinder and the oil plug will be worn. When the clearance increases or the machining accuracy becomes poor, oil leakage will occur. At this time, try to use oil with high viscosity. If the pressure still drops due to oil leakage, it is recommended to replace the oil cylinder.
2. If the instrument is not used for a long time, the leather ring in the oil cylinder will not work if it is dry, which will also cause the pressure to not go up. To solve this problem, you need to soak the leather ring for a period of time or replace it.
3. The positioning of the safety valve is not correct. If the oil pump and oil delivery valve of the instrument are all right, if the pointer rises steadily to the high tonnage in case of low tonnage, the pointer will always stop in a small range. No matter how the oil inlet volume is increased, the tonnage will still rise. At this time, it is necessary to loosen the nut of the safety valve, tighten the screw to an appropriate degree, and adjust the nut, because the safety valve is a device to ensure that the instrument will not be damaged in case of accident.
Fault 2: the force measuring pointer vibrates or stops when it is uniformly loaded
After the instrument is installed, there will be air in the force measuring cylinder for the first time. If it is not eliminated in time, it will not only affect the accuracy, but also cause pointer vibration. Therefore, the air should be emptied. If the oil cylinder is too dirty, it will also cause pointer vibration. During use, you should pay attention to regularly clean the oil cylinder. After cleaning, tighten the nut and start the machine. When the oil in the oil cylinder flows out, install the piston.
In addition, the gas booster pump manufacturer believes that the maintenance of the pressure gauge fatigue test bench should be done well. This can be done: keep the machine clean at any time, and wipe the machine bench with cotton cloth before and after each use to keep it clean. Spray antirust oil on the surface of the machine once a week (wipe it off after spraying for 2 hours). Fill the machine driving parts (such as screw) with lubricating oil regularly every month (just use ordinary lubricating oil). Regularly check whether the control panel keys are normal.
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