Method for suspending motor rotor of micro motor mechanical pump

Abstract

The invention relates to a method for suspending a motor rotor of a micro motor mechanical pump. The method relates to a primary stator coil, a secondary stator coil, a primary permanent magnetic rotor, a secondary permanent magnetic rotor, a permanent magnetic bearing and a taper sliding bearing. At a first stage, the primary stator coil is started to drive the rotors, and stable rotational inertia is give to a stator assembly; at a second stage, the secondary stator coil is started, the stator assembly is disengaged from the taper sliding bearing through the magnetic attracting force generated by dislocation of the magnetic center line of the secondary stator coil and the magnetic center line of the secondary permanent magnetic rotor, and suspension operation of the rotor assembly is achieved. The method for suspending the motor rotor of the micro motor mechanical pump has the advantages that the structure of an electromagnetic suspension control system is simple, complex feedback control is of no need, the friction loss of a bearing is lowered, vibration and noise in the operation process of a motor are lowered, the operation reliability of the bearing is improved, and therefore the service life of the micro motor is greatly prolonged.

Description

technical field [0001] The invention relates to a micro-motor mechanical pump, in particular to a method for suspending the motor rotor of the micro-motor mechanical pump. Background technique [0002] With the development of microchannel liquid cooling technology, microfluidic technology, and special pumping technology, micromechanical pumps have a wide range of application space and prospects as the power source of their fluid systems. Among them, the micro-motor is the driving element of the micro-mechanical pump, and its reliability is the guarantee of the stability of the whole pump. [0003] The existing technology to solve the problem of supporting the rotor of the micromechanical pump motor is mainly divided into two types: bearingless and bearing. The bearingless micromechanical pump relies on the hydraulic effect to realize the self-alignment of the rotor. Due to the lack of rigid support, the assembly accuracy of the rotor is low. The central positioning effe...

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Problems solved by technology

[0003] The existing technology to solve the problem of supporting the rotor of the micromechanical pump motor is mainly divided into two types: bearingless and bearing. The bearingless micromechanical pump relies on the hydraulic effect to realize the self-alignment of the rotor. Due to the lack of rigid support, the assembly accuracy of the rotor is low. The central positioning effect of the rotor is poor in the environment, and the micro mechanical pump with bearings is mainly divided into contact bearings and magnetic suspension bearings

The application of contact bearings in micro motors is limited by factors such as size and strength, and the damage caused by impact and wear causes bearing failure

As for magnetic bearings, since feedback control is necessary, the system is complex and expensive

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