At present, the pressure range involved in vacuum technology is 105Pa ~ 10-13pa. Such a wide range of pressure can not be achieved by any equipment to obtain vacuum – vacuum pump alone, so it needs to be realized by different structures of vacuum pump. According to the working principle, several kinds of vacuum pumps are described. They are single-stage vacuum pump and double-stage vacuum pump. Let’s talk about the correct assembly sequence of 2BV double stage liquid ring vacuum pump.
Assembly sequence of 2BV vacuum pump:
2BV two-stage liquid ring vacuum pump is a single-stage pump with integral structure and pump coaxial. The shaft seal adopts mechanical seal, which has the characteristics of simple structure, simple installation, oil-free, safe and reliable. Before installation, we should carefully read the installation manual and precautions, and be sure to complete according to the installation sequence.
One. Rotor assembly
1.2 the impeller of 2BV two-stage liquid ring vacuum pump shall be installed on the correct position of the shaft and shall not be biased to one side, otherwise it will cause uneven axial clearance with the pump shell and friction.
2. Install the shaft sleeve and tighten the nut of the shaft sleeve. In order to prevent the leakage of water along the shaft, seal the rubber ring between the shaft sleeve and the nut. After assembly, ensure that the rubber ring is tightly pressed by the nut of the shaft sleeve and the nut and the shaft sleeve are tight.
3. Install the seal ring, packing sleeve, water seal ring, packing gland and water retaining ring on the shaft.
4. Install the bearing end cover and bearing, tighten the bearing nut, then install the bearing body and fasten the bearing body and bearing end cover.
5. Install the coupling.
Two. Suspension rotor
1. Lift the rotor assembly installed above into the pump body smoothly.
2. After the seal ring is in place, rotate the rotor, observe whether there is friction in the seal ring, and adjust the seal ring until the rotor is light.
Three. Screw on pump cover of 2BV double stage liquid ring vacuum pump
After fastening the pump cover, tighten the bolts on the pump joint surface and the bearing body glands on both sides. Then, rotate the rotor to see if it is different from the previous one. If there is no obvious abnormality, connect the air pipe, sealing water pipe, etc. and add the packing. Then, align the coupling.
2BV double stage liquid ring vacuum pump is widely used in petroleum, chemical, pharmaceutical, food, sugar industry and other fields. Because the gas compression process is isothermal in the working process, it is not easy to explode when compressing and pumping flammable and explosive gas, so it is more widely used.