The principle and use the attention problem - of mechanical vacuum pump

mechanical vacuum pump, also known as backing pump. Low mechanical vacuum pump is the most widely used vacuum pump. It use oil to keep the sealing effect, and rely on the mechanical method to continuous changes in the pump suction chamber volume, thus continuous expansion for vacuum pumping the gas container volume. There are many kinds of mechanical vacuum pump, commonly used with rotary piston, piston reciprocating, fixed plate and rotation plate.

the composition of mechanical vacuum pump

mechanical vacuum pump is usually used to remove dry air, but we can not remove the high oxygen content, explosive or corrosive gas. Mechanical vacuum pump is usually used to remove a permanent gases, but they are not good effect for moisture, so that they can't remove moisture. Is a major part of the rotary vane pump stator, rotor, shrapnel, etc. The rotor on the stator, but have different in the stator, the spindle, like two inscribed circle. Two pieces of shrapnel is installed in the rotor slot, install a spring between two pieces of shrapnel, to ensure the shrapnel close to stick on the wall of stator.

the working principle of mechanical vacuum pump

it two shrapnel alternate two role: on the one hand, it from the air inlet suction gas; On the other hand, it compressed the gas and its discharge pump suction. Every time the rotor rotation, complete two suction and discharge pump.

when the pump continues clockwise rotating vane pump through the inlet suction gas continuously, and from the outlet for the gas discharge pump, so as to realize the purpose of the air pump into the container. In order to improve the limiting vacuum pump, pump stator is submerged in oil. In this way, enough oil and harmful everywhere are often stored in the gap to fill gaps in the space. Plays a role of lubricating oil, therefore, on the one hand, on the other hand, the seal and plug gap and the harmful effect of the space, prevent the reverse flow of gas molecules through various channels to the low-pressure space.

mechanical vacuum pump exhaust effect also is associated with the looseness of the speed of the motor and belt. When the motor belt is loose, motor speed is very slow, mechanical vacuum pump exhaust effect will be worse. As a result, the mechanical vacuum pump oil seal need regular maintenance, spot check and spot check on a regular basis. Too little oil cannot achieve the sealing effect. will leak air, can jam too much oil inlet hole, cannot absorb and exhaust air. Usually, the oil level to zero. 5 cm below the line.

roots pump is equipped with a mechanical vacuum pump as the backing pump.

roots pump: it is a kind of mechanical vacuum pump, a pair of double or more rotor synchronous high-speed rotation. Due to its working principle and the roots blower fan is same, so also known as the roots vacuum pump. The pump - in 100 1 of Pa pressure range have large pumping speed. It makes up for the defects within the scope of the mechanical vacuum water pump exhaust ability. The pump can't work since the atmosphere or direct emissions atmosphere. Its purpose is to increase the differential pressure between the air inlet and air outlet. The rest of the need of mechanical vacuum pump to complete. Therefore, must be equipped with mechanical vacuum pump as the backing water pump.

prevention and maintenance of mechanical vacuum pump

when using mechanical vacuum pump, must pay attention to the following problems:

1. Mechanical vacuum pump should be installed in clean and dry place.

2。 The pump itself should be kept clean and dry. Inside the pump oil has the function of sealing and lubrication, therefore should take the specified amount to add.

3。 oil should be replaced periodically, replacement should be first before drainage of waste oil, cycle for at least three months to half a year.

4。 According to the connecting wires.

5。 Before mechanical vacuum pump stops working, close the inlet valve, cut off power supply, open the valve, by filling the air in the air inlet to the pump.

6。 During pump work, the oil temperature shall not exceed 75 degrees Celsius, or as a result of the oil viscosity is too small, seal will be loose.

7。 Regularly check the mechanical vacuum pump belt tightness degree, the speed of the motor, roots pump motor speed, the sealing effect of sealing ring.