Flange type torque sensor

Abstract

The invention discloses a flange type torque sensor which includes a flange shaft, and left and right flanges arranged at the two ends of the flange shaft. The left flange is connected with a power input end. The right flange is connected with a load detection end. Both the left and right flanges include an outer ring connected with the power input end or the load detection end and an inner ring connected with the flange shaft. The flange shaft is provided with a shaft hole. An elastomer and a strain gauge are arranged on the inner wall of the shaft hole. The outer ring and the inner ring arearranged as a whole. An isolation portion(s) for isolating the outer ring and the inner ring is / are arranged on the end face of the left flange or / and on the end face of the right flange. Thus, when the left and right flanges are connected between a motor and a load to be detected, after the isolation portion(s) is / are arranged between the outer ring and the inner ring, the bolt link position of each flange and the middle position, directly connected with the flange shaft, of the flange are isolated. Therefore, the static stress will not be transferred to the strain gauge, the deformation of the strain gauge under non-detection stress can be minimized, namely, zero drift can be minimized.

Description

technical field [0001] The invention relates to the field of measuring devices, in particular to a flange type torque sensor. Background technique [0002] The torque sensor is an instrument for measuring the torque signal of the equipment, which is divided into two categories: dynamic and static. Among them, the dynamic torque sensor can also be called torque sensor, torque speed sensor, non-contact torque sensor, rotary torque sensor, etc. Torque sensors are used to detect the perception of torsional torque on various rotating or non-rotating mechanical parts, and convert the physical changes of torque into precise electrical signals. [0003] In terms of testing principle, torque sensors can be divided into strain type, magnetoelastic type, magnetoelectric type and other types, etc. The torque measurement of strain gauge sensor adopts strain electrical measurement technology. The strain type torque sensor is to paste the resistance strain gauge on the specified position ...

AI Technical Summary

Problems solved by technology

[0004] At present, the Chinese patent with the publication number CN104792445A discloses a wireless linkage torque sensor. The torque sensor includes: a main part, which is the main part of the torque sensor; the left flange is connected to the left torsion plate through eight bolts, and the left There are four countersunk threaded through holes on the small end of the flange, which are used to connect and fix the tested part; the right flange is connected to the right torsion plate through eight bolts, and there are four countersunk holes on the small end of the right flange. The threaded through hole is used to connect and fix the tested part; the strain gauge is pasted in the middle of the elastic body. The strain gauge is a component that senses the torque signal and can convert the mechanical strain of the elastic body into a change in resistance. Due to the left flange and the right Both flanges can be connected to the tested part, one of the flanges is used as the tested part, and the other flange needs to be installed with a driving part, such as a motor, to drive the entire flange to rotate. The flange torque sensor needs It is installed between the motor and the tested part through the flange, and when the flange is installed, one end of the left and right flanges is connected to the tested part and the other end is connected to the driving part. The angle error after the left and right flanges are fixed will make the flange shaft in the There is a small deformation before the force is applied, and the elastic body installed in the shaft hole and the strain gauge attached to the elastic body will also be slightly deformed under the influence of it, forming a static stress that counteracts the deformation. Before the test, this stress will make the test starting position of the strain gauge higher than the zero point, that is, increase its zero point drift and affect the test result

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