A hydrodynamic 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 hydrodynamic suspension mechanical pump. Background technique [0002] Beginning in the 1980s, micro-electromechanical systems (MEMS) based on micromachining technology have gradually moved from the laboratory exploration stage to the industrial application period. Microfluidic system is a main research direction in microelectromechanical system. It has the characteristics of small size, automation, integration and mass production. Due to its small size, it can reduce the ineffective volume in the flow system, improve the control accuracy, and reduce Energy consumption and reagent consumption, and mechanical response speed is fast. Therefore, in recent years, it has a huge market application prospect in the fields of precise fluid control, chemical analysis (such as micro total analysis system), chip cooling and micro satellites. As the power source in t...

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