(1) The working pressure of the hydraulic system is out of balance. The so-called imbalance of the working pressure of the hydraulic system means that the pressure of hydraulic jacking products is not stable enough, the unloading pressure is relatively high, and the conversion of pressure is lagging. Hydraulic valves and hydraulic pumps are the main reasons for these failures, such as oil trapping in hydraulic pumps, which has not been dealt with in time. The pump-related parts may be damaged, or there may be problems with the machining accuracy of the parts. In view of these situations, it is necessary to adopt the elimination method, and to redesign the structure for removing trapped oil, so as to improve the machining accuracy.

(2) Loud noise and vibration. During the operation of many hydraulic systems, noise and vibration mainly come from two aspects. One, the processing accuracy of hydraulic jacking products hydraulic pumps is low, the processing accuracy of hydraulic motors is not high, the pressure pulsation and flow rate are relatively large, and there are serious oil trapping phenomena, and the phenomenon of unqualified bearing quality may cause noise . In the second case, air enters the hydraulic jacking products hydraulic system, which will directly cause cavitation. During operation, during the transmission process, the low pressure and high pressure are converted, resulting in a sudden change in the volume of the air, resulting in noise.