CN110925359A

CN110925359A - Dry friction centrifugal axial damping piece

Info

Publication number: CN110925359A
Application number: CN201911405673.4A
Authority: CN
Inventors: 宋铎
Original assignee: 703th Research Institute of CSIC
Current assignee: 703th Research Institute of CSIC
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-03-27

Abstract

A dry friction centrifugal axial damping piece relates to a damping piece. The invention aims to solve the problem that the service life of the existing flexible coupling with the intermediate shaft is short due to the fact that the axial resonance phenomenon can occur. The damping part is a hollow torus (1), the outer side wall of the hollow torus (1) is in interference fit with the inner side wall of the intermediate shaft (3), and the left half part of the wall thickness of the hollow torus (1) is larger than the right half part of the wall thickness of the hollow torus (1). In order to reduce the abrasion of the damping structure and prolong the service life, the periphery of the thickened part is nitrided, and the surface of an inner hole of the intermediate shaft is subjected to nitriding treatment. The invention is used for vibration reduction between the intermediate shaft and adjacent equipment.

Description

Dry friction centrifugal axial damping piece

Technical Field

The invention relates to a damping piece, in particular to a dry friction centrifugal type axial damping piece.

Background

A flexible coupling is a coupling that allows for individual axial displacement of the rotors and allows for some misalignment between the two connected rotor pairs. Mechanical parts are generally used to couple two shafts (driving and driven) in different mechanisms for common rotation to transmit torque. In the high-speed heavy-load power transmission, some couplings also have the functions of buffering and damping and improving the dynamic performance of a shaft system. The coupling consists of two halves which are respectively connected with the driving shaft and the driven shaft. Generally, a power machine is connected with a working machine by means of a coupling. If the natural frequency of the axial vibration of a system consisting of the middle shaft and the flexible parts at the two ends of the flexible coupling with the middle shaft is superposed with the working rotating speed, the axial resonance phenomenon can occur, and the service life of the coupling is shortened.

As described above, the conventional flexible coupling with an intermediate shaft has a problem of a short service life of the coupling due to the occurrence of an axial resonance phenomenon.

Disclosure of Invention

The invention aims to solve the problem that the service life of the conventional flexible coupling with an intermediate shaft is short due to the axial resonance phenomenon. Further provides a dry friction centrifugal axial damping member.

The technical scheme of the invention is as follows: the utility model provides a centrifugal axial damping spare of dry friction is hollow tourus, interference fit between the lateral wall of hollow tourus and the inside wall of jackshaft, half on the left side of the wall thickness of hollow tourus is greater than half on the right side of the wall thickness of hollow tourus.

Furthermore, the interference magnitude between the outer side wall of the hollow circular ring body and the inner side wall of the intermediate shaft is 0.2mm-2 mm.

Preferably, the interference between the outer side wall of the hollow circular ring body and the inner side wall of the intermediate shaft is 0.2mm-0.6 mm.

Furthermore, the hollow ring body is provided with a plurality of grooves in an annular array mode along the circumferential direction of the hollow ring body.

Further, the number of grooves is 3-18.

Preferably, the number of grooves is 6 or 12.

Further, the groove width b of the groove is 3mm-20 mm.

Preferably, the groove width b of the groove is 3mm to 15 mm.

Compared with the prior art, the invention has the following effects:

according to the invention, the interference magnitude and the rotating centrifugal force provided by the friction centrifugal type axial damping structure are utilized to generate proper friction force between the intermediate shaft and the adjacent equipment, so that the effect of hindering the generation of vibration or greatly reducing the vibration amplitude is achieved. Thereby avoiding the axial resonance phenomenon and prolonging the service life of the coupler by at least 1 to 3 years. In addition, the invention has simple structure and obvious vibration damping effect.

Drawings

FIG. 1 is a schematic illustration of the present invention prior to mating with an intermediate shaft;

fig. 2 is a view taken from a in fig. 1.

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 2, a dry friction centrifugal axial damping member of the embodiment is a hollow torus 1, an outer side wall of the hollow torus 1 and an inner side wall of an intermediate shaft 3 are in interference fit, and a left half wall thickness of the hollow torus 1 is greater than a right half wall thickness of the hollow torus 1.

The second embodiment is as follows: referring to fig. 1 to 2, the interference between the outer sidewall of the hollow torus 1 and the inner sidewall of the intermediate shaft of the present embodiment is 0.2mm to 2 mm. So set up, adopt the setting of cutting knife 2, help the little wrapping bag of dry powder nature of different materials to cut, the wrapping bag that helps disassembling is complete and cutting edge is neat, improves the clearance of material and reduces the possibility of mixing the wrapping bag piece in the material. Other components and connections are the same as in the first embodiment.

The third concrete implementation mode: referring to fig. 1 to 2, the interference between the outer sidewall of the hollow torus 1 and the inner sidewall of the intermediate shaft of the present embodiment is 0.2mm to 0.6 mm. So set up, transmission mode is simple, reliable. Other compositions and connections are the same as in the first or second embodiments.

The fourth concrete implementation mode: referring to fig. 1 to 2, the hollow torus 1 of the present embodiment is provided with a plurality of grooves 2 in an annular array along the circumferential direction thereof. So set up, can be applicable to the cutting of the wrapping bag of different specification models, swing arm mechanism 3 drives cutting knife 2 and realizes the cutting to the wrapping bag to the detached in-process in both sides, and after the cutting was accomplished, swing arm mechanism 3 carried cutting knife 2 automatic re-setting under canceling release mechanical system 5's effect, does not influence the cutting to next wrapping bag. Other compositions and connection relationships are the same as in the first, second or third embodiment.

The fifth concrete implementation mode: the present embodiment is described with reference to fig. 1 to 2, and the number of the grooves 2 of the present embodiment is 3 to 18. So set up, prevent that two cutting knife 2 from taking place to interfere when rotating, the interval between two cutting knife 2 is 3-8 mm. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.

The sixth specific implementation mode: the present embodiment is described with reference to fig. 1 to 2, and the number of the grooves 2 of the present embodiment is 6 or 12. So set up, be convenient for rotate the in-process synchronous. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The seventh embodiment: the present embodiment will be described with reference to fig. 1 to 2, and the groove width b of the groove 2 of the present embodiment is 3mm to 20 mm. So set up, reset fast. Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.

The specific implementation mode is eight: the present embodiment will be described with reference to fig. 1 to 2, and the groove width b of the groove 2 of the present embodiment is 3mm to 15 mm. So set up, give the flexibility for reseing. Other constitutions and connection relations are the same as those of any one of the first to seventh embodiments.

The working principle of the invention is explained in conjunction with fig. 1 to 2:

referring to fig. 1, the present invention is used between an intermediate shaft of a flexible coupling and an adjacent device. The interference magnitude is set between the outer radius R of the dry friction centrifugal axial damping structure and the radius R of the inner hole of the intermediate shaft as required, n grooves are machined in the circumferential direction, n is 3-18, the groove width b is 3-20 mm, and the surface of the inner hole of the intermediate shaft is nitrided in order to reduce the abrasion of the damping structure and prolong the service life. The dry friction centrifugal axial damping structure and equipment at one end of the flexible coupling are firmly fixed together or are of an integral structure, the dry friction centrifugal axial damping structure and the equipment are assembled in an inner hole of the intermediate shaft, and under the combined action of elastic deformation force caused by interference and centrifugal force after rotation, a certain contact force is generated between the damping structure and the inner hole of the intermediate shaft, so that friction force is generated to provide damping when relative motion or relative motion trend exists, vibration is prevented from occurring or vibration amplitude is greatly reduced.

Claims

1. A dry friction centrifugal axial damping member characterized by: damping member is hollow tourus (1), interference fit between the lateral wall of hollow tourus (1) and the inside wall of jackshaft (3), half on the left of the wall thickness of hollow tourus (1) is greater than half on the right of the wall thickness of hollow tourus (1).

2. A dry-friction centrifugal axial damper according to claim 1, characterized in that: the interference magnitude between the outer side wall of the hollow circular ring body (1) and the inner side wall of the intermediate shaft is 0.2mm-2 mm.

3. A dry-friction centrifugal axial damper, according to claim 2, characterized in that: the interference magnitude between the outer side wall of the hollow circular ring body (1) and the inner side wall of the intermediate shaft is 0.2mm-0.6 mm.

4. A dry-friction centrifugal axial damper according to claim 3, characterized in that: the hollow ring body (1) is provided with a plurality of grooves (2) along the circumferential direction in a ring array mode.

5. A dry-friction centrifugal axial damper, according to claim 4, characterized in that: the number of the grooves (2) is 3-18.

6. A dry-friction centrifugal axial damper, according to claim 5, characterized in that: the number of the grooves (2) is 6 or 12.

7. A dry-friction centrifugal axial damper, according to claim 6, characterized in that: the groove width b of the groove (2) is 3mm-20 mm.

8. A dry-friction centrifugal axial damper, according to claim 7, characterized in that: the groove width b of the groove (2) is 3mm-15 mm.