High-reliability miniature mechanical pump

Abstract

The invention discloses a high-reliability miniature mechanical pump which comprises a pump body, pump chambers, a fluid inlet, a fluid outlet, an impeller and a brushless motor, wherein the pump body is formed in such a manner that a volute, a motor protection housing and a motor cover plate are connected with one another, and the pump chamber for accommodating the impeller and the pump chamber for accommodating the brushless motor are formed. The fluid inlet and the fluid outlet are formed in the volute and communicated with the pump chambers. The brushless motor is arranged in the pump chamber in the motor protection housing and the motor cover, an output shaft of the brushless motor is connected with a spindle of the impeller, and the brushless motor comprises a permanent magnet rotor assembly and a winding coil stator assembly, wherein a metal sleeve is arranged between the rotor assembly and the stator assembly, and a waterproof sealant layer is formed on the surface of a stator coil to wrap and seal the stator coil. The invention further discloses other structural adjustment. With the adoption of the high-reliability miniature mechanical pump, the water tightness of the motor can be achieved, the heat dissipation performance of the motor can be improved, the spare part structure of the pump can be further simplified and compact, the effective seal of the pump chambers and the precise concentric positioning of the impeller can be realized.

Description

technical field [0001] The invention belongs to the technical field of fluid pumps, and more specifically relates to a high-reliability micro-mechanical pump. Background technique [0002] Usually, the machines that lift, convey or increase the pressure of liquid or gas, that is, change the mechanical energy of the prime mover into the energy of liquid or gas, so as to achieve the purpose of pumping liquid or gas are collectively referred to as pumps. At present, there are many types of conventional pumps. Mechanical pumps are widely used because of their simple principle, mature manufacturing process and easy control. As an important research direction of micro-electromechanical systems, micro-mechanical pumps have been widely used in drug delivery systems, electronic device cooling systems, thermal control systems, microchemical analysis systems, and other fields. [0003] For micropumps, because of the small size, the relative surface roughness and relative clearance are...

AI Technical Summary

Problems solved by technology

Due to the small size, conventional pump sealing methods such as labyrinth seals and thread seals cannot be realized

In addition, in order to reduce the difficulty of processing, the inlet and outlet pipelines and the volute of the general pump are separated and reassembled. If the seal between the two cannot be guaranteed, it will also cause liquid leakage.

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