Minitype vacuum hydraulic pump

Abstract

The invention discloses a minitype vacuum hydraulic pump which comprises a shell, an end cover, a flow guiding liquid input tube, a flow guiding liquid output tube, an impellor, a motor rotor, motor coils and a shaft sleeve, wherein the end cover is sealed at one end of the shell; the impellor is installed on a rotary shaft of the motor rotor; the motor rotor and the shaft sleeve are fixed in the shell after assembling and rotate through the driving of the motor coil; the motor coils are divided into a plurality of groups; the shell is provided with seal cavities which are used for arranging a plurality of motor coils; the shell is also provided with a seal pump liquid chamber and a secondary slow pressure chamber internally; the secondary slow pressure chamber is communicated with the pump liquid chamber; after the liquid is introduced from the flow guiding liquid output tube by the rotation of the impellor on the rotary shaft of the motor rotor, the liquid is exhausted from the pump liquid chamber, the secondary slow pressure chamber and the flow guiding liquid output tube; and the flow guiding liquid input tube and the flow guiding liquid output tube are respectively provided with a pipeline seal device which prevents the liquid in the pump liquid chamber and the secondary slow pressure chamber from leaking when the vacuum hydraulic pump is shut down.

Description

technical field [0001] The invention relates to a miniature liquid booster pump, more specifically, relates to a miniature vacuum hydraulic pump specially used in the technical field of refrigeration under high vacuum conditions. Background technique [0002] There are many types of hydraulic pumps, which can be divided into: (1) Power pumps, also called wheel pumps or vane pumps, rely on the power of rotating blades to transmit energy to the liquid continuously, making the liquid The kinetic energy and pressure energy increase under normal temperature and atmospheric pressure conditions, and then the kinetic energy is converted into pressure energy through the extrusion chamber; (2) Positive displacement pump, which relies on the periodic change of the volume of the sealed working space containing the liquid to convert the periodic Power is transmitted to the fluid, increasing the pressure of the fluid and forcing the fluid out. [0003] Among them, positive displacement p...

AI Technical Summary

Problems solved by technology

[0006] At present, all hydraulic pumps can only work normally at normal temperature and normal atmospheric pressure. Once they are under vacuum conditions, they cannot work normally due to weightlessness.

Moreover, traditional dynamic pumps usually require a higher speed to drive. Under normal atmospheric pressure conditions, they are not suitable for working in an ultra-negative pressure vacuum environment. This is because the working environment has lost the pressure difference and gravity, and the current traditional hydraulic pumps cannot work in the liquid state for a long time under the strong working voltage.

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