Vacuum pump refers to the vacuum suction device to obtain the vacuum device, widely used in metallurgy, chemical industry, food and other industries. Sliding valve vacuum pump is a vacuum pump, it is mainly single-stage and two-stage two forms. Next, we will learn more about the slide valve vacuum pump through the principle diagram of the slide valve vacuum pump. The structure of the slide valve vacuum pump is mainly composed of a pump body, a spool valve rotating eccentrically within the pump body, a semicircular slide valve guide rail, an exhaust valve, and a shaft. The pump body is provided with a spool valve ring (4) Built-in eccentric wheel (3), the eccentric wheel is fixed on the shaft (2), the shaft coincides with the center line of the pump body. The slide valve ring is provided with a rectangular slide valve stem (5), which can slide up and down and swing left and right in the semicircular slide valve guide (7). Therefore, the pump chamber is separated into the valve slide rings A and B Two rooms. During operation of the vacuum pump, the volumes of the two chambers A and B are periodically changed so that the evacuated gas continuously enters the aspirating chamber of the gradually increasing volume; meanwhile, the gas is compressed as the volume of the evacuating chamber shrinks , And out of the pump through the exhaust valve. Two-stage type of slide valve pump, in fact, by two single-stage pump in series. Its high and low vacuum chamber in the same pump body, some are cast directly into a whole, some are pressed into the partition into the pump chamber into high and low two rooms. With the gradual development of the vacuum industry, more and more forms of vacuum pumps, but the vacuum pump maintenance are the same. Special attention must be paid to the oil used for the vacuum pump depending on whether the gas pumped by the pump is corrosive.
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