Rotary vane type vacuum pump with canned motor

Abstract

The invention discloses a rotary vane type vacuum pump, and provides the rotary vane type vacuum pump with a canned motor. According to the rotary vane type vacuum pump with the canned motor, pump oil and motor coils are completely isolated, the safety and the reliability are high, the secondary starting load is small, the service life is long, the energy conservation and environmental protection performance is high, and the problems that secondary starting of vacuum pumps is difficult after stopping, high-power motors need to be arranged, the energy consumption is high, rotary vanes are easily broken and the service life of the vacuum pumps is influenced in the prior art are solved. The rotary vane type vacuum pump with the canned motor comprises a support, a pump body and an auxiliary fuel tank, wherein the pump body and the auxiliary fuel tank are arranged on the support and the auxiliary fuel tank is arranged outside the pump body in a covering mode; the canned motor and a main fuel tank are arranged under the support, the main fuel tank is arranged at the lower end of the canned motor in a covering mode and horizontally supports the canned motor, a shielding cover pipe is arranged outside a motor rotor shaft of the canned motor in a spaced sleeving mode, the upper end of the shielding cover pipe communicates with the auxiliary fuel tank through a support oil inlet channel and a pump cavity of a pump body, the lower end of the shielding cover pipe extends for communicating with the part under the fuel level of the main fuel tank, and the auxiliary fuel tank arranged outside the pump body correspondingly communicates with the main fuel tank through an oil return pipe.

Description

technical field [0001] The invention relates to a rotary vane vacuum pump, in particular to a rotary vane vacuum pump which is completely isolated from the motor coil, is safe and reliable, has small secondary startup load, long service life, energy saving and environmental protection and adopts a shielded motor. Background technique [0002] The direct-coupled rotary vane vacuum pump usually adopts a horizontal structure. After the vacuum pump of this structure is shut down, because the pump chamber is in a state of negative pressure, the vacuum pump oil in the oil tank is sucked into the pump chamber under the action of negative pressure. When starting, the pump rotor in the pump cavity drives the rotary vane to rotate, and the rotary vane squeezes the vacuum pump oil in the pump cavity to be squeezed out from the exhaust valve port. Since the vacuum pump oil is incompressible, the rotary vane The bending moment borne by squeezing vacuum pump oil is often several times tha...

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Problems solved by technology

[0003] The present invention mainly provides a rotary vane vacuum pump with a shielded motor that is completely isolated from the pump oil, is safe and reliable, has a small secondary start-up load, and has a long service life, energy saving and environmental protection, and solves the problems existing in the prior art. After the rotary vane vacuum pump is stopped, it is difficult to start the second time. It needs to be equipped with a high-power motor, which not only consumes high energy, but also the rotary vane is easy to break, which affects the service life of the vacuum pump and other technical problems.

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