ã€Asia Pump Network News】 Oil-sealed vacuum pump usually with gas-town device, it is also known as gas-town vacuum pump. According to its structural characteristics are divided into the following five types. How to classify oil seal vacuum pump? Sealed vacuum pump Category 1, rotary vane vacuum pump rotor with a certain eccentricity in the pump housing and the inner surface of the pump housing fixed surface close to the rotor slot equipped with two (or more) rotary vane, when the rotor When rotating, the vane can reciprocate along its radial groove and keep contact with the inner wall of the casing. The vane rotates with the rotor to divide the pump chamber into several variable volumes. Rotary vane vacuum pump is a low vacuum pump. It can be used alone or as a foreline pump for other high or ultra-high vacuum pumps. Rotary vane pump for small and medium-sized pump, the product has been series. Rotary vane pump has a single-stage and two-stage, generally made more than two-stage, in order to obtain a higher degree of vacuum. Most of the rotary vane pump is a single working chamber structure, commonly used two radial vane, but also useful three inclined vane. Through-vane vacuum pump also has applications. 2, the slide valve vacuum pump outside the eccentric rotor is equipped with a spool valve, the rotor rotates the slide valve slide along the wall and the inner wall of the pump, slide the upper part of the spool valve slide in the slide valve slide, and the pump The chamber is divided into two variable volumes. Sliding valve vacuum pump suction principle and rotary vane pump similar, but the two different structures. Sliding valve vacuum pump is the use of slide valve body to change the suction chamber volume, it is called the spool pump. 3, fixed-piece vacuum pump in the pump housing with an eccentric rotor close to the inner surface of the pump, the pump housing is equipped with a radial vane always contact with the rotor surface, when the rotor rotates, the vane can slide up and down will be The pump chamber is divided into two variable volumes. Fixed-chip vacuum pumping speed smaller, a single, two-stage, two-stage pump ultimate vacuum up to 10-1Pa. Pump structure is simple, long service life and easy maintenance, but because of its performance than rotary vane pump, so few have been production and application. 4, trochoidal line vacuum pump in the pump chamber equipped with a eccentric trochoid rotor, which along the pump cavity wall rotation and the pump chamber is divided into two variable volume. Pump dynamic balance is good, so the pump running more stable, vibration is also small, speed can be increased, you can do small size, pumping speed, suitable for the development of large pumping speed mechanical vacuum pump. As the suction pipe is short and thick, help to improve pumping speed under low pressure. Therefore, in the low pressure range (1 ~ l00Pa) trochoidal pump pumping speed curve is better than the slide valve pump. Trochoidal pump rotor and pump body is a pair of conjugate tooth-shaped meshing movement, so the exhaust gas contains a certain amount of dust and small particles are not sensitive. The trochoid pump to adapt to the higher temperature of the work environment, the temperature control device can make the pump chamber to maintain a high temperature (ie trochoidal heat pump), used to extract a large amount of condensable water vapor. 5, multi-chamber rotary vane pump In a pump housing mounted in parallel with the same motor driven by a number of independent studio rotary vane vacuum pump. (Editor: Li Juan QQ: 2355962925) Recommended reading: Acting oil seal vacuum pump works 2016 CIMC Xiamen 98