CN-122014759-A - Coupling device

CN122014759ACN 122014759 ACN122014759 ACN 122014759ACN-122014759-A

Abstract

A coupling for implementing offset compensation and shock protection. The shaft coupling comprises a first pipe fitting and a shaft fitting, wherein the first pipe fitting is used for connecting one of a driving shaft and a driven shaft, the first pipe fitting comprises a straight pipe section and a taper pipe section which are connected with each other and have central axes coincident, the taper pipe section inclines from the straight pipe section to the outer peripheral side, the taper pipe section has elasticity, the shaft fitting is used for connecting the other one of the driving shaft and the driven shaft, a plurality of connecting pieces which are uniformly distributed in the circumferential direction are arranged, the connecting pieces protrude to the outer peripheral side of the shaft fitting, the connecting pieces have elasticity, the shaft fitting is inserted into the straight pipe section and the taper pipe section, the shaft fitting is matched with the shaft hole of the straight pipe section and allows axial sliding, the connecting pieces are connected with the taper pipe section, and the connecting pieces are configured to be damaged by set torque.

Inventors

CHEN YALIN
ZHAO CHONG
ZHANG XULIN
JIA LIN
WANG HUADONG
LIU ZHIQIANG

Assignees

中国航发商用航空发动机有限责任公司

Dates

Publication Date: 20260512
Application Date: 20241108

Claims (9)

1. A coupling, comprising: A first pipe fitting for connecting one of the driving shaft and the driven shaft, comprising a straight pipe section and a taper pipe section which are connected with each other and have a central axis coincident, the taper pipe section being inclined from the straight pipe section to the outer peripheral side, the taper pipe section having elasticity, and The shaft piece is used for connecting the other one of the driving shaft and the driven shaft, a plurality of connecting pieces which are uniformly distributed in the circumferential direction are arranged, the connecting pieces protrude to the outer circumferential side of the shaft piece, and the connecting pieces have elasticity; Wherein, the The shaft piece is inserted into the straight pipe section and the taper pipe section, is matched with the shaft hole of the straight pipe section and allows axial sliding; the connection tab connects the cone segments, the connection tab configured to be broken by a set torque.
2. The coupling according to claim 1, wherein: the connecting piece protrudes radially from the outer peripheral surface of the shaft member.
3. The coupling according to claim 1, wherein: the end part of the taper pipe section is provided with a flange which is connected with the connecting sheet through threads.
4. The coupling according to claim 1, wherein: The shaft piece is in coaxial transition fit with the straight pipe section.
5. The coupling according to claim 1, wherein: The pipe wall thickness of the taper pipe section is smaller than that of the straight pipe section so that the taper pipe section has elasticity.
6. The coupling according to claim 1, wherein: the shaft is provided by a second tube.
7. The coupling according to claim 6, wherein: the thickness of the connecting sheet is smaller than the thickness of the pipe wall of the second pipe fitting so that the connecting sheet has elasticity.
8. The coupling according to claim 1, wherein: The first pipe fitting and the shaft piece are both provided with a dynamic balance ring protruding towards the outer peripheral side, and the dynamic balance ring is provided with a threaded hole.
9. The coupling according to claim 1, wherein: The shaft piece is provided with four connecting pieces.

Description

Coupling device Technical Field The invention relates to a transmission technology, in particular to a coupler. Background The over-rotation test device is a main test device for checking the fatigue strength of structural members of rotors of mechanical wheel discs and is used for solving the problems of various strength and rigidity such as strength storage, service life evaluation and the like. In the turbine rotor over-rotation test, the turbine rotor is typically provided with a high rotational speed exceeding ten thousand revolutions per minute and a maximum torque exceeding three kilo-newtons meters by a main motor, a gear box. In the test process, a motor is connected with a gear box and drives a turbine rotor to rotate through a coupler, errors in the manufacturing and mounting processes of the turbine rotor can cause shaft centering deviation, axial movement deviation and the like, dynamic balance is damaged, impact torque is caused, and a test device and the turbine rotor are damaged. Disclosure of Invention The invention aims to provide a coupling for realizing deviation compensation and impact protection. According to the embodiment of the invention, the coupling comprises a first pipe fitting and a shaft fitting, wherein the first pipe fitting is used for connecting one of a driving shaft and a driven shaft and comprises a straight pipe section and a taper pipe section which are connected with each other and have the central axis coincident, the taper pipe section inclines from the straight pipe section to the outer peripheral side, the taper pipe section has elasticity, the shaft fitting is used for connecting the other one of the driving shaft and the driven shaft, a plurality of connecting pieces which are uniformly distributed in the circumferential direction are arranged, the connecting pieces protrude to the outer peripheral side of the shaft fitting, the connecting pieces have elasticity, the shaft fitting is inserted into the straight pipe section and the taper pipe section, the shaft fitting is matched with the shaft hole of the straight pipe section and allows axial sliding, the connecting pieces are connected with the taper pipe section, and the connecting pieces are configured to be damaged by set torque. In one or more embodiments, the tabs project radially from the outer circumferential surface of the shaft. In one or more embodiments, the cone segment is flanged at an end to threadably connect the connection tabs. In one or more embodiments, the shaft is in coaxial transition engagement with the straight tube segment. In one or more embodiments, the taper pipe section has a pipe wall thickness that is less than a pipe wall thickness of the straight pipe section to provide elasticity to the taper pipe section. In one or more embodiments, the shaft is provided by a second tube. In one or more embodiments, the thickness of the connection piece is smaller than the wall thickness of the second pipe so that the connection piece has elasticity. In one or more embodiments, the first pipe and the shaft are each provided with a dynamic balance ring protruding toward the outer peripheral side, and the dynamic balance ring is provided with a threaded hole. In one or more embodiments, the shaft is provided with four of the tabs. Embodiments of the present invention have at least one of the following benefits: When radial deviation exists between the driving shaft and the driven shaft, the cone pipe section and the connecting sheet can bend and incline relative to the central axis, so that two ends of the coupler are positioned at different radial positions to compensate the radial deviation. When axial deviation exists between the driving shaft and the driven shaft, the cone pipe section and the connecting sheet can bend and incline relative to the central axis, the axial lengths of the cone pipe section and the connecting sheet are compressed or prolonged, and at the moment, the shaft piece axially slides in the straight pipe section, so that the axial positions of two ends of the coupler are adjusted, and the axial deviation is compensated. When the excessive torque such as impact torque exists between the driving shaft and the driven shaft, if the torque reaches the set torque, the connecting sheet is damaged, the torque transmission between the first pipe fitting and the shaft is invalid, the driving shaft and the driven shaft are prevented from being damaged by the excessive torque, and the protection of the over torque is realized. After the connecting sheet is damaged, the straight pipe section and the shaft hole of the shaft element are matched to limit the shaft element to be separated from the straight pipe section, the shaft element is kept in the straight pipe section, the shaft element is prevented from being separated from the first pipe element to form cantilever swing, the driving shaft and the driven shaft are damaged, and operators are protected. Drawings The above and othe