Energy-saving anti-backflow variable pitch screw vacuum pump

Abstract

The invention discloses an energy-saving anti-backflow variable pitch screw vacuum pump, and relates to the technical field of vacuum pumps. The pump comprises a pump body, an anti-backflow assembly and a force application assembly, a partition plate is arranged at one end in the pump body and divides the pump body into a driving chamber and a compression chamber, two meshed screws are arranged in the compression chamber, gears are fixed to the ends, located in the driving chamber, of the screws, the two gears are meshed, and the compression chamber is provided with an air inlet end and an air outlet end. The anti-backflow assembly comprises a pipe body and a sliding rod. The force application assembly is designed, the reverse rotation condition of the screw rod is avoided through the ratchet mechanism, the arc-shaped spring is arranged between the outer gear ring and the shaft body, the outer gear ring has certain reverse elastic force provided in advance, the elastic force is applied to the screw rod in advance through the outer gear ring and the gear, and when the backflow trend occurs in the pump body, the reverse rotation of the screw rod is avoided. The elastic force applied by the force application assembly can be used for counteracting the reverse pushing force generated by the screw rod, the air exhaust efficiency of the product can be improved, and the energy-saving effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of vacuum pumps, and in particular relates to an energy-saving anti-backflow variable-pitch screw vacuum pump. Background technique [0002] The variable pitch screw vacuum pump has the characteristics of high vacuum, stable pumping performance, oil-free and clean pump chamber, simple and compact structure and maintenance-free, no contact between the pumping elements, no friction, no exhaust gas, and no waste liquid discharge. At present, the most ideal vacuum pumping equipment in the field of mechanical vacuum pump has been widely recognized and used in all walks of life. [0003] In recent years, with the needs of many new processes, the variable-pitch screw vacuum pump with traditional structure has been unable to meet the needs of these new processes. [0004] During the use of the vacuum pump, the pressure in the pump body will increase with the compression of the gas, and the increased pressure will g...

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Problems solved by technology

[0003] In recent years, with the needs of many new processes, the variable-pitch screw vacuum pumps with traditional structures can no longer meet the needs of these new processes, and mainly have defects such as low pumping efficiency, high exhaust temperature, and large power consumption.

[0004] During the use of the vacuum pump, the pressure in the pump body will increase with the compression of the gas, and the increased pressure will give the gas inside the pump a backflow trend, and the backflow trend will produce a reverse thrust on the screw, and the screw The received thrust is offset by the torsional force provided by the motor. In order to ensure its pumping efficiency, the motor requires high power and consumes a lot of energy. Pumping efficiency, resulting in a large energy consumption problem

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