Liquid dynamic pressure suspension mechanical pump

Abstract

The invention belongs to the field of minitype mechanical pumps and discloses a liquid dynamic pressure suspension mechanical pump which comprises a volute, an impeller, an upper end cover, a brushless electric machine and a waterproof sleeve, wherein the brushless electric machine comprises an electric machine shell, a silicon steel sheet, a coil, a magnetic steel rotor, a waterproof sleeve, a rotor sleeve and a rotor rotary shaft; and when the liquid dynamic pressure suspension mechanical pump works, a radial liquid dynamic pressure bearing can be formed between the outer wall of the rotor sleeve and the inner wall of the waterproof sleeve through liquid and the radial displacement of the magnetic steel rotor can be limited. As the magnetic steel rotor has magnetism, magnetic force is generated between the silicon steel sheet and the magnetic steel rotor, and the magnetic steel rotor moves in the axial direction now. In addition, when liquid enters a gap at the upper part of the magnetic steel rotor, liquid generates upward thrust to the magnetic steel rotor, and resultant force of thrust in two directions and the magnetic force can limit the axial displacement of the magnetic steel rotor, so that non-contact suspension of the magnetic steel rotor can be realized.

Description

technical field [0001] The invention belongs to the field of miniature centrifugal pumps, and more specifically relates to a mechanical pump. Background technique [0002] Since the 1980s, micro-electromechanical systems (MEMS) based on micro-processing technology have gradually entered the industrial application period from the laboratory exploration stage. Microfluidic system is a main research direction in microelectromechanical systems. It has the characteristics of small size, automation, integration and mass production, and because of its small size, it can reduce the invalid volume in the flow system, improve control accuracy, and reduce Low energy consumption and reagent consumption, and fast mechanical response. Therefore, in recent years, it has a huge market application prospect in the fields of fluid precision control, chemical analysis (such as micro-total analysis system), chip cooling and micro-satellite. As the power source in the microfluidic system, the m...

AI Technical Summary

Problems solved by technology

In order to improve the power-to-mass ratio of the micro-pump and make the hydraulic components under the micro-size output more pumping work, it is necessary to further increase the impeller speed, resulting in the doubled load on the bearing

Due to the above reasons, mechanical contact bearings seriously restrict the service life of micropumps

Images