Addtime： 2020-07-18 Browse times： 2611
The power required by vacuum pump to compress gas is directly proportional to the pressure difference. Once the gas pressure difference is too high, the pump may overload and cause motor winding burning. How to prevent vacuum pump overload prevention measures, together to understand it!
1. Mechanical automatic pressure regulating bypass valve is adopted
The bypass valve is installed in the bypass pipe between its outlet and inlet. This valve controls the pressure difference between the pump inlet and outlet not to exceed the rated value. When the pressure difference reaches the rated value, the valve will open automatically by the differential pressure, so that the outlet and inlet of the vacuum pump are connected, and the pressure difference between the inlet and outlet is reduced rapidly. At this time, SK vacuum pump works under almost no pressure difference load. When the pressure difference is lower than the rated value, the valve will close automatically, and the gas will be pumped out by the front stage pump through the SK vacuum pump. With the bypass relief valve, it can start up with the front pump at the same time, so that the unit operation is simple and convenient.
2. Hydraulic coupling is adopted
The use of hydraulic coupling can also prevent the overload of the pump, so that the pump can work under high pressure difference. The hydraulic coupling is installed between the pump and the motor. Under normal working condition, the hydraulic coupling transmits rated torque from the motor end to the pump. The maximum pressure difference of SK vacuum pump is determined by the maximum torque transmitted by the hydraulic coupling, and the maximum torque transmitted by the hydraulic coupling is adjusted by the amount of liquid in it. When the pump works under high pressure difference or starts at the same time with the front stage pump, there is a speed difference in the liquid coupling, that is, sliding. Only a certain torque is transmitted to make the pump work at a reduced speed. With the pumping process, the gas load decreases and gradually accelerates to the rated speed.
3. Using vacuum electrical components to control the pump inlet pressure
Pressure sensitive elements such as vacuum capsule relay or electric contact vacuum pressure gauge are installed at the inlet pipeline of vacuum pump. After the vacuum system is started, when the pressure at the inlet of the SK vacuum pump is lower than the given value, the pressure sensing element sends a signal to start the SK vacuum pump through the electrical control system. If the pressure at the inlet of the pump is higher than the specified value, the vacuum pump will be automatically closed, thus ensuring the reliable operation of the SK vacuum pump.
Vacuum pump overload prevention measures believe that after you understand, in the future use, I believe you will reduce the loss, at the same time more conducive to our use.
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