Pneumatic motor

Abstract

The invention discloses a pneumatic motor and provides the pneumatic motor capable of effectively improving conversion efficiency of compressed gas by reducing 'back pressure resistance'. The pneumatic motor comprises an outer shell, a stator and a rotor; an annular power area is formed at the position between the peripheral wall surface of an impeller portion of the rotor and the corresponding internal wall surface of the stator; multiple acting unit sets are distributed circumferentially along the acting area at intervals; each acting unit set comprises an acting through hole and an exhaust hole arranged in the stator. Each of the acting unit sets can generate corresponding torque power on the impeller portion, high-pressure airflow discharged from the acting through hole of one acting unit set can discharge exhaust gas acting on the rotor directly, rapidly and sufficiently through the exhaust hole in the acting unit set, resistance of exhaust gas backpressure on the impeller portion can be effectively reduced, rotation speed of the rotor can be further increased, and meanwhile energy exchange efficiency of the compressed gas can be increased.

Description

technical field [0001] The present invention relates to an air motor. Background technique [0002] An air motor is a device that converts the pressure potential energy of compressed air into rotational mechanical energy. According to different working speeds, air motors can generally be divided into high-speed air motors and low-speed air motors. [0003] In the existing low-speed air motors, the commonly used structure is the movable vane rotor structure, such as the one disclosed in the patent No. CN201320311007.6, named "Air Motor Structure" (hereinafter referred to as Document 1). Air motor: This type of air motor needs to be in contact with the inner wall of the corresponding housing during the rotation process, and the blade needs to be constantly reciprocating, so this type of structure is only suitable for low-speed motors, but not for high-speed air motors. [0004] In the patent No. CN201420443055.5, the document named "A Pneumatic Motor" (hereinafter referred t...

AI Technical Summary

Problems solved by technology

However, in the disclosed air motor structure shown in this document 3, since the air flow cannot be discharged in time after doing work on the runner, the lack of air after doing work will produce a phenomenon of "back pressure resistance" on the runner, which in turn causes the runner to The rotation speed of the rotor cannot be further increased, which restricts the rotation speed of the runner; and once the "back pressure resistance" reaches a certain level, it will greatly hinder the rotation of the runner, thereby affecting the conversion efficiency of the compressed gas

[0006] In addition, in the above-mentioned documents, bearings are used for the installation of the rotating shaft, and when the speed of the air motor is high, the use of bearing support will seriously restrict the further increase of the speed of the air motor

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