The pressure of 2SK hydraulic system is adjusted improperly, resulting in system heating. Generally, the hydraulic system is a high pressure and large flow system. Here is a detailed introduction:
The PLC introduces roots vacuum pump, which greatly improves the reliability of electrical system. At the same time, observe the pressure and the working conditions of each system, and pump at normal speed after each system works normally. The pumping work shall be carried out continuously as far as possible. The piston of the concrete cylinder shall keep running at the maximum stroke, so as to give full play to the maximum efficiency of the vacuum pump, and make the concrete cylinder wear evenly in the length direction. If the pressure is too high and unstable, and the oil temperature rises. In case of open crown vibration and pumping difficulty of the conveying pipe, do not pump it forcibly, and find out the cause immediately and eliminate it.
In the investigation, it is found that the temperature of the hydraulic system of many types of 2SK vacuum pumps can be as high as 60E after using for about 40min, and the thermal balance temperature of the hydraulic system can be as high as 70E after using for about 2h, while the normal thermal balance temperature of the hydraulic system should be about 50E. Therefore, the oil temperature of the hydraulic system is too high, that is, the heating problem. In the hydraulic system, because of the performance requirements, the system will generally be equipped with safety valve, relief valve and sequence valve.
If the pressure of the safety valve is adjusted too low, the safety valve will be opened frequently, resulting in overflow loss and system heating; if the pressure is adjusted too high, it will increase the leakage in the system and make the system heating, so it is necessary to correctly calculate and adjust the safety valve and pressure value according to the load requirements of the hydraulic system, so as to ensure that the system works within the specified pressure range.
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