How to Prevent Overload of Roots Vacuum Pump

The power required to compress gas in Roots middle-ring vacuum pump is proportional to the pressure difference. Once the pressure difference is too high, the middle-ring vacuum pump may overload and cause motor winding burning. There are several ways to solve the overload problem of the central vacuum pump:
1. The mechanical automatic pressure regulating bypass valve is adopted. The bypass valve is installed in the bypass pipeline between the outlet and the inlet of Roots Central Vacuum Pump. The pressure difference between the inlet and outlet of this valve control pump does not exceed the rated value. When the pressure difference reaches the rated value, the valve opens automatically by the pressure difference function, which makes the outlet and inlet of Roots central vacuum pump communicate, and makes the pressure difference between the inlet and outlet decrease rapidly. At this time, Roots vacuum pump works under almost no pressure difference load. When the pressure difference is lower than the rated value, the valve closes automatically and the gas passes through.
Roots Central Vacuum Pump is pumped by the front pump. Roots middle ring vacuum pump with pump bypass relief valve can start at the same time with the front pump, which makes the operation of the unit simple and convenient.
2. Hydraulic couplings are used; hydraulic couplings can also prevent the overload of pumps, so that pumps can work under high pressure difference. The hydraulic coupling is installed between the pump and the motor. Under normal working conditions, the hydraulic coupling transmits rated torque from the motor end to the pump. The maximum pressure difference of Roots middle ring vacuum pump is determined by the maximum torque transmitted by the hydraulic coupling, and the maximum torque transferred by the hydraulic coupling is regulated by the amount of liquid in it. When the pump works under high pressure difference or starts at the same time with the front pump, the speed difference, i.e. sliding, occurs inside the liquid coupling, which only transmits a certain moment to slow down the pump. As the pumping proceeds, the gas load decreases, and the Roots middle ring vacuum pump gradually accelerates to the rated speed.
3. Vacuum electrical components are used to control the inlet pressure of the pump; vacuum diaphragm relay or electric contact vacuum pressure gauge are installed in the outlet pipeline of Roots central vacuum pump. After the start of the vacuum system, when the pressure at the entrance of Roots vacuum pump is lower than the given value, the pressure sensor sends out a signal and opens the Roots vacuum pump through the electrical control system. If the inlet pressure of the pump is higher than the prescribed value, the Roots Central Vacuum Pump will be automatically closed, thus ensuring the reliable operation of the Roots Central Vacuum Pump.
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