CN115355260A - A supplementary mechanism that maintains of axis for membrane disc shaft coupling - Google Patents
A supplementary mechanism that maintains of axis for membrane disc shaft coupling Download PDFInfo
- Publication number
- CN115355260A CN115355260A CN202210970990.6A CN202210970990A CN115355260A CN 115355260 A CN115355260 A CN 115355260A CN 202210970990 A CN202210970990 A CN 202210970990A CN 115355260 A CN115355260 A CN 115355260A
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- Prior art keywords
- bearing
- ring
- assembly
- membrane disc
- flange
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- 239000012528 membrane Substances 0.000 title claims abstract description 42
- 230000007246 mechanism Effects 0.000 title claims abstract description 22
- 230000008878 coupling Effects 0.000 title claims abstract description 19
- 238000010168 coupling process Methods 0.000 title claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 19
- 230000004323 axial length Effects 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 230000036316 preload Effects 0.000 claims 1
- 238000005299 abrasion Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
- F16D3/56—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic metal lamellae, elastic rods, or the like, e.g. arranged radially or parallel to the axis, the members being shear-loaded collectively by the total load
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The application belongs to aviation accuse engine shafting and connects the field, in particular to an axis is supplementary to be maintained mechanism for membrane disc coupling, includes: a membrane disc assembly; the first flange is connected to one end of the membrane disc assembly, and the second flange is connected to the other end of the membrane disc assembly; the shaft pin penetrates through a central hole of the second flange, the shaft pin is coaxial with the membrane disc assembly, a bearing assembly is mounted on the shaft pin and is in clearance fit with the inner wall surface of the membrane disc assembly, the bearing assembly comprises a first bearing and a second bearing, a bearing sleeve is mounted between the first bearing and the second bearing, the bearing sleeve comprises a support ring and a support wall formed by the inner wall of the support ring in a radial protruding mode, the outer wall surfaces of the first bearing and the second bearing are mounted on the inner wall surface of the bearing sleeve, the support wall separates the first bearing from the second bearing, and a coupler capable of guaranteeing the existence of axial compensation and radial compensation under a higher coaxiality control level is provided.
Description
Technical Field
The application belongs to the field of connection of shafting of an aviation control engine, and particularly relates to an axis auxiliary maintaining mechanism for a membrane disc coupler.
Background
The diaphragm disc coupler has the advantages of simple structure, strong compensation capability, no need of lubrication and the like, has small vibration, low noise and convenient operation and maintenance, is suitable for high power, and is widely applied to occasions with high reliability requirements on the coupler in the field of aviation and the like.
The thinnest part of the profile of the membrane disc coupling is usually not more than 1mm, and the membrane disc is subjected to various variable load effects such as centrifugal force, torque, bending moment and the like in the working process, so that the stress form is very complex. The membrane disc may be damaged and broken under the action of various factors such as material processing problems, metal fatigue and overload. In order to cause larger loss caused by high-speed swinging or flying out of a rotating axis which loses stability after the shaft coupling is broken and damages peripheral devices, a transmission shaft needs to idle on the original rotating axis after a film disc is damaged; the domestic patent CN109404432A provides an axis auxiliary maintaining mechanism with a simple structure, wherein a limiting inner sleeve is fixed on the inner wall of a flange on one side of the structure, the far end of the limiting inner sleeve extends to the inner wall of a shaft tube on the other side beyond a membrane disc assembly, a radial gap is reserved between the limiting inner sleeve and the inner wall of the shaft tube, and the interference of the membrane disc and the shaft tube during angular displacement compensation is avoided. When the membrane disc is damaged, the limiting inner sleeve and the inner wall of the shaft sleeve are mutually constrained, so that the shaft system is prevented from generating overlarge swing. However, it is easy to understand that the inner limiting sleeve and the inner wall of the shaft sleeve are in sliding friction, a radial gap reserved between the inner limiting sleeve and the inner wall of the shaft sleeve for avoiding angular motion interference cannot accurately position the rotary axis of the shaft system, and the mechanism has the defects of large friction force, large abrasion, high temperature rise, large vibration and the like in combination with the sliding friction. In summary, the axis assist retention mechanism provides only the most basic protection, requiring a shutdown for service immediately after the coupling is damaged. However, in the aerospace field, if the shaft coupling is damaged during flight, the shafting is likely to be required to be maintained in idle running till safe landing, and therefore, a novel axis auxiliary maintaining mechanism is required to solve the problems.
Disclosure of Invention
In order to solve the problem that the shaft coupler does not influence the membrane disc shaft coupler to compensate the axial displacement and the angular offset;
the problem that shafts at two ends of a coupler cannot keep the original rotary axis after a film disc is damaged is solved, and the problems of abrasion and temperature rise caused by large friction between axis maintaining devices are solved;
the problem that when the membrane disc is damaged, severe vibration is generated between shafting due to high coaxiality is solved; an axis assist maintaining mechanism for a diaphragm disc coupling, comprising:
a membrane disc assembly;
the first flange is connected to one end of the membrane disc assembly, and the second flange is connected to the other end of the membrane disc assembly;
and the pin shaft penetrates through the central hole of the second flange, is coaxial with the membrane disc assembly, and is provided with a bearing assembly in clearance fit with the inner wall surface of the membrane disc assembly.
Preferably, the bearing assembly comprises a first bearing, a second bearing and a bearing sleeve, wherein a step ring is arranged at the center of the inner wall of the bearing sleeve, and the step ring divides the inner wall of the bearing sleeve into two inner cylindrical surfaces which are respectively matched with the outer rings of the first bearing and the second bearing.
Preferably, the outer diameter of the bearing sleeve is smaller at both ends than in the middle.
Preferably, the free end of the pin shaft is provided with an external thread, the self-locking nut is connected with the external thread to provide a pre-tightening force for pressing the bearing assembly to the second flange, and the second flange is provided with a step surface which abuts against the bearing assembly.
Preferably, a pressure ring is arranged between the self-locking nut and the second bearing, one end of the pressure ring is connected with the self-locking nut, and the other end of the pressure ring is connected with an inner ring of the second bearing; the step surface is provided with a flange which is propped against the inner ring of the first bearing, and an adjusting pad is arranged between the second bearing and the inner ring of the first bearing and used for adjusting the distance between the second bearing and the inner ring of the first bearing.
Preferably, the step ring inside the bearing sleeve 6 is provided with a high step and a low step. And a low step with a larger diameter and a high step with a smaller diameter and a smaller axial length than the low step are arranged between the second bearing and the outer ring of the first bearing, the low step is used for adjusting the distance between the second bearing and the outer ring of the first bearing, and a gap between the high step and the bearing can be filled with lubricating grease.
Preferably, the axial length of the adjustment pad is smaller than the axial length of the low step.
Preferably, the outer diameter of the adjusting pad is smaller than the outer diameters of the second bearing and the first bearing inner ring; the diameter of the lower step of the bearing sleeve is larger than the inner diameters of the second bearing and the first bearing outer ring.
The advantages of the present application include:
1. the friction force of the mechanism after the membrane disc is damaged is reduced, the temperature rise and the abrasion of the mechanism are reduced, and the idle maintaining time of a shaft system is prolonged.
2. Provides higher coaxiality control level and reduces the vibration when a shafting idles.
3. A coupling is provided that ensures that axial compensation and radial compensation are present at the same time at a higher level of coaxiality control.
4. The dual bearing design improves the strength and life of the retention mechanism.
Drawings
FIG. 1 is a schematic view of an axis assist retaining mechanism for a diaphragm disc coupling according to a preferred embodiment of the present application;
FIG. 2 is a schematic view of a preferred embodiment bearing assembly of the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.
As shown in fig. 1-2, the present application provides an axis assist maintaining mechanism for a diaphragm disc coupling, comprising:
the membrane disc assembly 3 is provided with 4 membrane discs, each two membrane discs are in one group, two groups of membrane discs are welded at the position with the small diameter of the membrane disc, and the two membrane discs in each group are welded at the position with the maximum diameter; forming a membrane disc assembly 3 with strong axial and radial compensation capability;
connect in the first flange 1 of 3 one ends of diaphragm disk subassembly, connect in the second flange 2 of the 3 other ends of diaphragm disk subassembly and leave the centre bore when the design, round pin axle 4 is worn out to first flange 1 side from the centre bore, and round pin axle 4 is coaxial with diaphragm disk subassembly 3, installs bearing assembly 5 on the round pin axle 4, bearing assembly 5 and 3 internal face clearance fit of diaphragm disk subassembly.
In some alternative embodiments, the bearing assembly 5 includes a first bearing 7 and a second bearing 8, the bearing sleeve 6 is installed between the first bearing 7 and the second bearing 8, the bearing sleeve 6 includes a support ring and a support wall formed by radially protruding an inner wall of the support ring, an outer ring outer wall surface of the first bearing 7 and the second bearing 8 is installed on an inner wall surface of the bearing sleeve 6, and the support wall separates the first bearing 7 from the second bearing 8.
The outer cylindrical surface of the supporting sleeve 6 is in small clearance fit with the center of the membrane disc assembly 3, the outer cylindrical surface of the supporting sleeve 6 is designed into an arc surface with a large diameter at the middle part and slightly small diameters at the two ends, so that interference between the supporting sleeve 6 and the membrane disc assembly 3 when the angular displacement is compensated by the coupler is avoided. The arrangement position and the width of the supporting sleeve 6 can meet the requirement that the shaft system can still support the center of the membrane disc 1 after the membrane disc 1 is broken under the ultimate elongation state.
And two inner sides of the bearing sleeve 6 are respectively provided with an inner cylindrical surface matched with the bearing outer ring. The inner center of the bearing bush is provided with a step ring, and the first bearing 7 and the second bearing 8 are separated by the high step of the step ring. The low step on the stepped ring serves as an axial locating bearing. The outer rings of the first bearing 7 and the second bearing 8 are arranged in the inner cylindrical surfaces at two sides of the bearing sleeve.
The step ring in the bearing housing 6 is provided with two steps. A low step with a larger diameter and a high step with a smaller diameter and a smaller axial length than the low step are arranged between the second bearing 8 and the outer ring of the first bearing 7, the low step is used for adjusting the distance between the second bearing 8 and the outer ring of the first bearing 7, and a gap between the high step and the bearing can be filled with lubricating grease.
The bearing dismounting tool interface is provided, and the interference of the bearing inner ring and the step ring when the bearing clearance is adjusted is also avoided. An axial adjusting pad 9 is arranged between the two bearing inner rings, the adjusting pad 9 is used for pre-tightening the bearings, the play of the first bearing 7 and the second bearing 8 is eliminated, and the rotation precision and the rigidity of the bearings are improved. When the coupler normally works, the bearing pre-tightening structure can avoid the reduction of the service life of the bearing and the vibration of the coupler caused by the looseness of the bearing assembly 5 due to the large bearing clearance. After the membrane disc is damaged, the bearing is pre-tightened to improve the coaxiality and the rigidity of the bearing assembly 5, so that the coaxiality of the whole shafting in idling is improved, and the idling vibration of the shafting is reduced. The adjusting pad meets the pre-tightening requirement by grinding the end face to change the axial dimension. In order to axially position the bearing assembly 5, the head of the pin shaft 4 is designed with threads, and the pressing ring 10 is sleeved in the pin shaft 4 and is pressed on the inner ring of the first bearing 7 by the self-locking nut 11, so that the gap between the inner ring of the bearing and the adjusting pad is eliminated.
When the membrane disc assembly 3 is damaged, the center of at least one membrane disc on one side of the first flange 1 without the stable rotation axis is in contact with the outer cylindrical surface of the support sleeve 6, and the second flange 2 with the stable rotation axis provides a centripetal force for the transmission shaft on one side of the first flange 1 through the transmission path of the pin shaft 4, the bearing assembly 5 and the support sleeve 6. The first bearing 7 and the second bearing 8 adapt to the rotating speed difference between the first flange 1 and the second flange 2 through rolling friction. The shaft system can maintain accurate rotation axis under very low friction force without damaging peripheral devices.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. An axis assist maintaining mechanism for a diaphragm disc coupling, comprising:
a membrane disc assembly (3);
the first flange (1) is connected to one end of the membrane disc assembly (3), and the second flange (2) is connected to the other end of the membrane disc assembly (3);
run through round pin axle (4) of second flange (2) centre bore, round pin axle (4) are coaxial with membrane disc subassembly (3), install bearing assembly (5) on round pin axle (4), bearing assembly (5) and membrane disc subassembly (3) internal face clearance fit.
2. The axial auxiliary maintaining mechanism for the diaphragm coupling according to claim 1, wherein the bearing assembly (5) comprises a first bearing (7), a second bearing (8) and a bearing housing (6), a step ring is arranged at the center of the inner wall of the bearing housing, and the step ring divides the inner wall of the bearing housing (6) into two inner cylindrical surfaces which are respectively matched with the outer rings of the first bearing (7) and the second bearing (8).
3. The shaft line auxiliary maintaining mechanism for a diaphragm disc coupling according to claim 2, wherein the outer diameter at both ends of the bearing housing (6) is smaller than that at the middle.
4. An axis auxiliary maintaining mechanism for a diaphragm coupling according to claim 2, characterized in that the pin (4) has an external thread at its free end, and the self-locking nut (11) is connected to the external thread to provide a preload force for the bearing assembly (5) to press against the second flange (2), and the second flange (2) has a step surface which abuts against the bearing assembly (5).
5. The auxiliary axis maintaining mechanism for the diaphragm coupling according to claim 4, characterized in that a pressing ring (10) is arranged between the self-locking nut (11) and the second bearing (8), one end of the pressing ring (10) is connected with the self-locking nut (11), and the other end is connected with the inner ring of the second bearing (8); the step surface is provided with a flange which is propped against the inner ring of the first bearing (7), an adjusting pad (9) is arranged between the second bearing (8) and the inner ring of the first bearing (7), and the adjusting pad (9) is used for adjusting the distance between the second bearing (8) and the inner ring of the first bearing (7).
6. The shaft line auxiliary maintaining mechanism for the diaphragm disc coupling as claimed in claim 5, wherein the step ring inside the bearing housing 6 is provided with a high step and a low step. A low step with a larger diameter and a high step with a smaller diameter and a smaller axial length than the low step are arranged between the second bearing (8) and the outer ring of the first bearing (7), the low step is used for adjusting the distance between the second bearing (8) and the outer ring of the first bearing (7), and a gap between the high step and the bearing can be filled with lubricating grease.
7. An axis auxiliary maintaining mechanism for a diaphragm disc coupling according to claim 6, characterized in that the axial length of the adjusting pad (9) is smaller than the axial length of the low step.
8. The shaft line auxiliary maintaining mechanism for the diaphragm disc coupling according to claim 6, wherein the outer diameter of the adjusting pad (9) is smaller than the outer diameters of the second bearing (8) and the inner ring of the first bearing (7); the diameter of the low step of the bearing sleeve is larger than the inner diameters of the second bearing (8) and the outer ring of the first bearing (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210970990.6A CN115355260A (en) | 2022-08-14 | 2022-08-14 | A supplementary mechanism that maintains of axis for membrane disc shaft coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210970990.6A CN115355260A (en) | 2022-08-14 | 2022-08-14 | A supplementary mechanism that maintains of axis for membrane disc shaft coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115355260A true CN115355260A (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210970990.6A Pending CN115355260A (en) | 2022-08-14 | 2022-08-14 | A supplementary mechanism that maintains of axis for membrane disc shaft coupling |
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| CN (1) | CN115355260A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100646A (en) * | 2014-07-28 | 2014-10-15 | 广西玉林卓越动力发电设备有限公司 | Close-fit shaft coupling and assembly process |
| EP3530974A1 (en) * | 2018-02-23 | 2019-08-28 | Goodrich Corporation | Flexible coupling for a drive system |
| CN111039223A (en) * | 2019-12-20 | 2020-04-21 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Spiral lifting device |
| CN210533321U (en) * | 2019-07-09 | 2020-05-15 | 中国航发哈尔滨东安发动机有限公司 | Axial clearance eliminating assembly for diaphragm coupling joint bearing |
| CN113790216A (en) * | 2021-09-22 | 2021-12-14 | 中国航发沈阳发动机研究所 | Rotating shaft double-bearing supporting structure |
| CN216873997U (en) * | 2022-02-21 | 2022-07-05 | 铁建重工新疆有限公司 | Bundling machine and piston roller assembly for bundling machine |
-
2022
- 2022-08-14 CN CN202210970990.6A patent/CN115355260A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100646A (en) * | 2014-07-28 | 2014-10-15 | 广西玉林卓越动力发电设备有限公司 | Close-fit shaft coupling and assembly process |
| EP3530974A1 (en) * | 2018-02-23 | 2019-08-28 | Goodrich Corporation | Flexible coupling for a drive system |
| CN210533321U (en) * | 2019-07-09 | 2020-05-15 | 中国航发哈尔滨东安发动机有限公司 | Axial clearance eliminating assembly for diaphragm coupling joint bearing |
| CN111039223A (en) * | 2019-12-20 | 2020-04-21 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Spiral lifting device |
| CN113790216A (en) * | 2021-09-22 | 2021-12-14 | 中国航发沈阳发动机研究所 | Rotating shaft double-bearing supporting structure |
| CN216873997U (en) * | 2022-02-21 | 2022-07-05 | 铁建重工新疆有限公司 | Bundling machine and piston roller assembly for bundling machine |
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