Electric actuator of central air-conditioning centrifuge set

Abstract

The invention discloses an electric actuator of a central air-conditioning centrifuge set, comprising a housing frame in which a motor and a potentiometer are arranged, wherein the motor is connected to a gear box; a gear and a bearing are arranged in the gear box; the potentiometer comprises an angle sensor; and the motor is a reversible speed reducing motor. After optimization, the lubrication way of the gear box is a grease sedimentation lubrication way; the bearing is a copper-based solid inlaid self-lubricating bearing; the gear is prepared from a 40Cr material; a limiting switch is a photoelectric switch; and the angle sensor of the potentiometer is prepared from conducting plastics. The electric actuator of the central air-conditioning centrifuge set has the following advantages that no oil leakage occurs, the internal structure is simple and the size is small, the gear and the bearing are not easy to damage; and the potentiometer is long in service life and accurate to control.

Description

technical field [0001] The invention relates to the technical field of air-conditioning components, in particular to an electric actuator for a central air-conditioning centrifugal unit. Background technique [0002] The electric actuator is an important part of the central air conditioning centrifugal unit. Usually, the electric actuator includes a frame, and a motor and a potentiometer are arranged in the frame. Wherein, the motor is connected with a gearbox, and gears and bearings are arranged in the gearbox; the electric actuator also includes components such as a position feedback device. In this way, the electric actuator converts the 4~20mA DC signal from the control system into an angle or displacement signal corresponding to the input signal, so as to control the regulating valve, so as to achieve the purpose of controlling the size of the damper in the centrifugal unit of the central air conditioner. function, and then can automatically control the operation of t...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. The motor adopts a shaded pole motor, which needs to be immersed in oil for heat dissipation

However, after the motor runs and the oil temperature rises, the internal pressure of the motor rises, so it is easy to leak oil at the two output shaft oil seals of the actuator and the wire interface.

2. The internal structure of the gearbox is complicated, resulting in a large external volume of the actuator, and the gears and bearings are easily damaged

3. The positive and negative rotation of the electric actuator is relatively frequent, which makes the potentiometer easy to wear and shortens the service life of the potentiometer

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