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Torque measuring device based on magnetic coupling

A magnetic coupling and torque measurement technology, applied in measuring devices, torque measurement, instruments, etc., can solve the problem of limiting the service life of the conductive slip ring of the rotating shaft, increasing the complexity of the device and the difficulty of installation, and not having the ability to detect torque. value and other issues to achieve the effect of improving reliability, increasing service life, and avoiding mechanical contact

Inactive Publication Date: 2019-03-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that in the rotating power transmission system, the bridge pressure input of the strain bridge on the rotating body and the detected strain signal output need to be transmitted between the rotating part and the stationary part through a conductive slip ring, which inevitably causes wear and heat , thus limiting the rotational speed of the rotating shaft and the service life of the conductive slip ring
The most important thing is that the current couplings do not have the function of detecting torque values, so couplings and torque sensors need to be installed during torque transmission and measurement, which increases the complexity of the device and the difficulty of installation

Method used

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  • Torque measuring device based on magnetic coupling
  • Torque measuring device based on magnetic coupling
  • Torque measuring device based on magnetic coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see figure 1 — Figure 8 , the torque measurement device based on the magnetic coupling, including a driving shaft (8) connected to a driven shaft (1) via a magnetic coupling, the driving shaft (8) is fixedly connected to the driving shaft of the magnetic coupling The rotor (6), the driven shaft (1) is fixedly connected to the driven rotor (4) of the magnetic coupling, the active rotor (8) and the driven rotor (1) are respectively equipped with permanent magnets (5), which are characterized in that : the driving shaft (8) or the driving rotor (6) and the driven shaft (1) or the driven rotor (4) are equipped with an angle measuring device (7,2), and a fixed angle sensor ( 10,9); the magnetic coupling utilizes the interaction of the magnetic field to realize the connection of two independent shafts (8,1) and the transmission of torque on the shaft; due to the transmission of different torques on the two shafts (8,1) There are different angle differences between the magn...

Embodiment 2

[0026] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0027] The installation steps of the angle measuring device are as follows: install an angle measuring device on the driving shaft, set a mark on the driven shaft at the same time, and determine the magnitude of the torque by measuring the angular displacement of the mark on the driven shaft relative to the driving shaft. The permanent magnets of the driving rotor and the driven rotor of the coupling are distributed as a radial magnetic field and a transverse magnetic field.

[0028] The installation structure of the angle measuring device is as follows: two angular displacement detection devices are installed on a non-rotating basis, and a mark is respectively set on the driving shaft and the driven shaft at the same time, by measuring the angle of the two marks relative to the non-rotating base The phase difference of the displacement signal is used to determine the angul...

Embodiment 3

[0032] combine figure 1 As shown, the torque measurement device based on the magnetic coupling is a non-contact torque transmission and measurement device, including the driving shaft (8), the driving rotor (6) and the permanent magnet (5) mounted on its surface , the driven rotor (4) and the permanent magnet (5) installed on its surface, the driven shaft (1) and the machine connecting the driven shaft (1), the angular displacement sensing device (2, 7) and the driven rotor Shell part (3). The thickness of the yoke of the driving rotor (6) and the driven rotor (4) is determined according to the actual magnetic field conditions, so as to ensure that most of the magnetic field saturation areas will not appear on the magnetic circuits of the driving rotor (6) and the driven rotor (4) Under the premise, a small part of the saturated magnetic field area is allowed to exist; the thickness of the permanent magnet (5) is selected according to the size of the actual required torque an...

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Abstract

The invention discloses a torque measuring device based on a magnetic coupling. The device utilizes the principle of interaction of magnetic fields to realize torque transmission between two rotatingshafts. The degree of distortion of a magnetic line in a magnetic field is used, and the torque magnitude is measured through the angular position difference between two rotor magnetic poles. The combination of the functions of a contactless coupling and a torque sensor is realized. The structure of a system is simplified, and the friction loss of the system is eliminated. Strain gage displacementdeformation, which is caused by repeated measuring of the mechanical connection structure of the existing torque sensor, and the problem of inaccurate torque measurement is prevented. The reliabilityof the system and the convenience of torque detection are improved.

Description

technical field [0001] The invention relates to the technical field of torque transmission and measurement, in particular to a torque measurement device based on a magnetic coupling. Background technique [0002] The traditional method of torque transmission and measurement is the joint use of couplings with mechanical contact and torque sensors. The general principle of the torque sensor is to convert the strain displacement detection into an electrical signal, that is, to paste the special torsion strain gauge on the measured elastic shaft with strain glue, and form a strain bridge. If the working power is supplied to the strain bridge, the The torsion electrical signal of the elastic shaft can be tested. The disadvantage is that in the rotating power transmission system, the bridge pressure input of the strain bridge on the rotating body and the detected strain signal output need to be transmitted between the rotating part and the stationary part through a conductive sli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L3/10
CPCG01L3/104
Inventor 罗建杜萌
Owner SHANGHAI UNIV
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