CN102588449B - Axial uniform load device of bearing and matching method thereof - Google Patents
Axial uniform load device of bearing and matching method thereof Download PDFInfo
- Publication number
- CN102588449B CN102588449B CN201210059806.9A CN201210059806A CN102588449B CN 102588449 B CN102588449 B CN 102588449B CN 201210059806 A CN201210059806 A CN 201210059806A CN 102588449 B CN102588449 B CN 102588449B
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- China
- Prior art keywords
- bearing
- elastic element
- clutch shaft
- axial
- balancing device
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Classifications
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- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
- F16C19/541—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing
- F16C19/542—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing with two rolling bearings with angular contact
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
- F16C25/08—Ball or roller bearings self-adjusting
- F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/02—Arrangements for equalising the load on a plurality of bearings or their elements
Abstract
The invention provides an axial uniform load device of a bearing and a matching method thereof. The device comprises a shaft, two bearings sleeved on the shaft, and a block bearing against the outer shroud of one ring; and each bearing comprises an outer shroud. The axial uniform load device of the bearing also comprises an elastic element which is arranged between end surfaces of the outer shrouds of the two bearings. The elastic element is determined through calculating the pretightening force F0 of the lower bearing in an assembled state and combining the axial play delta of the bearing cooperating with the block, so the length of a retaining ring is obtained; and after completing the mounting of the device, the two bearings of the invention can bear same axial loads, so the uniform load is realized. The manufacturing difficulty and the manufacturing cost of the device are low, and the uniform loads and the service lives of the two bearing s are improved.
Description
Technical field
The present invention relates to field of bearings, especially, relate to a kind of axial load-balancing device of bearing.In addition, the invention still further relates to a kind of matching method that comprises the axial load-balancing device of above-mentioned bearing.
Background technique
Two half inner axles are installed on aeroengine main shaft and are held, due to the power to weight ratio requirement of aeroengine, the radial dimension of bearing is restricted, and therefore, when thrust load is larger, need hold to bear with a pair of two half inner axles.
Prior art is by the coupling inside and outside footpath of bearing and axial internal clearance value, and the height difference of grinding-in outer shroud and interior ring, then supply in pairs.The accuracy of manufacturing of this technology to bearing, particularly the height difference of grinding-in outer shroud and interior ring has very high requirement.General, to eliminate after axial internal clearance value, the difference of two bearings inner and outer rings height difference should be not more than 0.0015mm, so its manufacture cost is very high, and manufacture difficulty is very large.
Even if two bearings each side all meets the demands, within the scope of required precision, also still there is certain foozle, thereby cause two bearings thrust load not realize, substantially all carry.Like this, the life-span of bearing the bearing of heavy load will reduce.
Summary of the invention
The object of the invention is to provide a kind of axial load-balancing device and matching method thereof of bearing, while working to solve two bearing fits, bears the unbalanced technical problem of load.
For achieving the above object, according to an aspect of the present invention, provide a kind of axial load-balancing device of bearing, comprised axle, be sleeved on two bearings on axle and keep out the block at the outer shroud end face of any one bearing; Each bearing comprises outer shroud, and the axial load-balancing device of bearing comprises elastic element, and elastic element is arranged between the outer shroud end face of bearing and the outer shroud end face of bearing.
Further, the axial load-balancing device of bearing also comprises the back-up ring being sleeved on axle, and the opposite end surface of back-up ring is supported respectively between the end face of the interior ring of two bearings.
Further, the elastic force of elastic element equals the pretightening force F with bearing
0.
Further, elastic element is spring.
Further, the interior ring of each bearing comprises respectively half interior ring of two same structures.
According to a further aspect in the invention, also provide a kind of matching method of axial load-balancing device of bearing, it comprises matches the axial load-balancing device of above-mentioned bearing, comprises the following steps:
Step S1: the pretightening force F of calculation bearing
0, wherein, pretightening force F
0=(F-2k δ)/2, wherein, F represents the axial work loads of axle under steady-working state, and k represents the elasticity coefficient of elastic element, and δ represents the axial internal clearance value of the bearing of mutually keeping out with block;
Step S2: according to pretightening force F
0with axial internal clearance value δ, determine elastic element;
Step S3: according to the rigidity of elastic element and pretightening force F
0, obtain the definite back-up ring of length.
Further, the length of back-up ring and elastic element elastic force equal pretightening force F
0time length match.
The present invention has following beneficial effect: axial load-balancing device and the matching method thereof of bearing of the present invention are provided with elastic element between two bearings; By calculating the pretightening force F of assembling condition lower bearing
0, the play axle δ in conjunction with this bearing, determines elastic element, the length of the back-up ring of reentrying; By after installation of the present invention, two bearings of the present invention can be born the load of formed objects, realize and all carrying.Manufacture difficulty of the present invention and manufacture cost are all lower, and equal loading capability and the working life of two bearings are all improved.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of axial load-balancing device of the bearing of the preferred embodiment of the present invention; And
Fig. 2 is the working state schematic representation of axial load-balancing device of the bearing of the preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 1, the preferred embodiments of the present invention provide a kind of axial load-balancing device of bearing, comprise axle 1, be sleeved on clutch shaft bearing 2 and the second bearing 3 on axle 1, be arranged on elastic element 4, back-up ring 5 and block 6 between clutch shaft bearing 2 and the second bearing 3.
In the present embodiment, clutch shaft bearing 2 and the second bearing 3 are angular contact ball bearing, and the interior ring of clutch shaft bearing 2 and the second bearing 3 comprises respectively half interior ring of two same structures.
Particularly, the two ends of elastic element 4 are arranged on respectively on the end face of outer shroud of clutch shaft bearing 2 and the end face of the outer shroud of the second bearing 3.Preferably, elastic element 4 is spring.Back-up ring 5 is sleeved on axle 1, and the opposite end surface of back-up ring 5 is supported respectively between the end face of interior ring of clutch shaft bearing 2 and the end face of the interior ring of the second bearing 3.
In the present embodiment, block 6 is arranged on the outer shroud of clutch shaft bearing 2, with the outer shroud that stops clutch shaft bearing 2 to left movement.In other mode of execution, block 6 also can be contained in the outer shroud of the second bearing 3, to stop that the outer shroud of the second bearing 3 moves right.
Step S1: the pretightening force F of calculation bearing
0;
F
0=（F-2kδ）/2，
Wherein, F represents the axial work loads of axle 1 under steady-working state;
K represents the elasticity coefficient of elastic element 4;
δ represents the axial internal clearance value of the bearing that is connected with block 6.
In the present embodiment, δ represents the axial internal clearance value of clutch shaft bearing 2.
Step S2: the pretightening force F calculating according to above-mentioned steps S1
0play value δ with bearing, determines elastic element 4;
Preferably, in actual applications, according to the pretightening force F obtaining
0with the play value δ of bearing, thereby make qualified elastic element 4.
Step S3: according to the F that preloads of the rigidity of the definite elastic element 4 of above-mentioned steps S2 and above-mentioned steps S1 calculating
0, obtain the definite back-up ring 5 of length;
Particularly, compression elastic element 4, makes the elastic force of elastic element 4 equal pretightening force F
0time, the length of the length of back-up ring 5 and elastic element 4 matches.
Match after good above-mentioned elastic element 4 and back-up ring 5, can install the axial load-balancing device of bearing of the present invention, concrete installation process is as follows:
Clutch shaft bearing 2 is arranged on axle 1, make the outer shroud of clutch shaft bearing 2 against block 6, then definite back-up ring 5 and the second bearing 3 of above-mentioned steps S3 is sleeved on axle 1 in turn, then the two ends of elastic element 4 are fixedly mounted on the outer shroud of clutch shaft bearing 2 and the second bearing 3, adjustable elastic element 4, makes the interior ring of clutch shaft bearing 2 and the second bearing 3 distinguish contact back-up ring 5.
The axial load-balancing device of bearing is installed by above-mentioned installation process, clutch shaft bearing 2 now and the second bearing 3 have all been subject to the pressure of elastic element 4, clutch shaft bearing 2 is subject to elastic element 4 directions pressure left, and the first end of clutch shaft bearing 2 outer shrouds is provided with block 6, block 6 stops that the outer shroud of clutch shaft bearing 2 is to left movement, the displacement of the interior ring of clutch shaft bearing 2 with respect to the displacement of the outer shroud of clutch shaft bearing 2 to the right, so the pretightening force F that clutch shaft bearing 2 is subject to
01direction to the right; And the pretightening force of the axial load-balancing device of whole bearing should be 0, so the pretightening force F that the second bearing 3 is subject to
02should be left, the displacement of the interior ring of the second bearing 3 is with respect to the displacement of outer shroud left.Pretightening force F
01, F
02equal and opposite in direction, opposite direction, and all with above-mentioned pretightening force F
0equal and opposite in direction.
Incorporated by reference to referring to Fig. 2, use the axial load-balancing device of bearing of the present invention, that is:
When axle 1 starts to rotate, axle 1 acts on the interior ring of the second bearing 3 and the interior ring of clutch shaft bearing 2, and direction left.Along with the increase of axial force F, the axial force that acts on clutch shaft bearing 2 interior rings can be gradually by the pretightening force F of clutch shaft bearing 2
01be unloaded to 0.In this process, bearing inner ring is without movement, and elastic element decrement is also constant, although so pretightening force F of clutch shaft bearing 2
01be unloaded to gradually 0, but the pretightening force F of the second bearing 3
02constant.
Axial force F continues to increase, the axial force F that clutch shaft bearing 2 is subject to
1direction will change, the interior ring that the axial force F of direction will make clutch shaft bearing 2 left with axle 1 together to left movement, when the moment that axle 1 drives the interior ring of clutch shaft bearing 2 to move, the pressure that axle 1 also drives the second bearing 3 to overcome elastic element 4 moves along with the movement of clutch shaft bearing 2, and now the decrement of elastic element 4 increases gradually.
When the distance of the interior ring motion of clutch shaft bearing 2 equals the axial internal clearance value δ of clutch shaft bearing 2, clutch shaft bearing 2 can not move again.Due to the effect of back-up ring 5, the second bearing 3 also can stop mobile, the thrust load F that now the second bearing 3 is subject to
2equal the elastic force of elastic element 4, be original pretightening force F
01with the reinforcement F δ sum of elastic element 4, i.e. F
2=F
02+ F
δ, F
δ=k δ, F
02=F
0so, F
2=F
0+ F
δ.
Because the rigidity of elastic element 4 is less than the rigidity of back-up ring 5, axial force F continues to increase, and the increment of axial force F after this will all be loaded into clutch shaft bearing 2, until axial force F reaches stable operation point.The thrust load F that clutch shaft bearing 2 is now subject to
3for F
3=F-F
2, and F
2=F
0+ F
δ, F
0=(F-2k δ)/2, F
δ=k δ, obtains F3=F/2 thus, and therefore, the thrust load that clutch shaft bearing 2 and the second bearing 3 are respectively born half, can realize all and carrying.
It should be noted that, before axial force F does not reach stable work loads, axial force F is a variable increasing gradually.
In other mode of execution, when the direction of axial force F is to the right time, block 6 is arranged on to the outer shroud of the second bearing 3, clutch shaft bearing 2 and the second bearing 3 also can be realized all carrying axial force F.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. an axial load-balancing device for bearing, comprising: axle (1), be sleeved on clutch shaft bearing (2), the second bearing (3) on described axle (1) and keep out the block (6) of outer race end face described in any one; Clutch shaft bearing (2) and the second bearing (3) comprise outer shroud, it is characterized in that, the axial load-balancing device of described bearing comprises elastic element (4), and described elastic element (4) is arranged between the outer shroud end face of described clutch shaft bearing (2) and the outer shroud end face of the second bearing (3); The elastic force of described elastic element (4) equals the pretightening force F of described clutch shaft bearing (2) or described the second bearing (3)
0;
The axial load-balancing device of described bearing also comprises the back-up ring (5) being sleeved on described axle (1), and the opposite end surface of described back-up ring (5) is supported respectively between clutch shaft bearing (2) and the interior ring end face of the second bearing (3).
2. the axial load-balancing device of bearing according to claim 1, is characterized in that, described elastic element (4) is spring.
3. the axial load-balancing device of bearing according to claim 1, is characterized in that, described in each, the interior ring of bearing comprises respectively half interior ring of two same structures.
4. a matching method for the axial load-balancing device of bearing, is characterized in that, the axial load-balancing device of any one bearing of described claims 1 to 3 is matched, and comprises the following steps:
Step S1: the pretightening force F that calculates described clutch shaft bearing (2) or described the second bearing (3)
0, wherein, described pretightening force F
0=(F-2k δ)/2, wherein, F represents the axial work loads of described axle (1) under steady-working state, and k represents the elasticity coefficient of described elastic element (4), and δ represents the axial internal clearance value of the described bearing of mutually keeping out with described block (6);
Step S2: according to described pretightening force F
0with described axial internal clearance value δ, determine described elastic element (4);
Step S3: according to the rigidity of described elastic element (4) and described pretightening force F
0, obtain the described back-up ring (5) that length is determined.
5. the matching method of the axial load-balancing device of bearing according to claim 4, is characterized in that, the length of described back-up ring (5) and described elastic element (4) elastic force equal described pretightening force F
0time length match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210059806.9A CN102588449B (en) | 2012-03-08 | 2012-03-08 | Axial uniform load device of bearing and matching method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210059806.9A CN102588449B (en) | 2012-03-08 | 2012-03-08 | Axial uniform load device of bearing and matching method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102588449A CN102588449A (en) | 2012-07-18 |
| CN102588449B true CN102588449B (en) | 2014-01-15 |
Family
ID=46477539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210059806.9A Active CN102588449B (en) | 2012-03-08 | 2012-03-08 | Axial uniform load device of bearing and matching method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN102588449B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148099B (en) * | 2013-03-13 | 2015-05-13 | 洛阳轴研科技股份有限公司 | Elastic bearing |
| CN105003550B (en) * | 2015-06-03 | 2017-12-05 | 陕西航天导航设备有限公司 | Single shaft connects bearing assembling device and its assembly method |
| CN105114452B (en) * | 2015-08-21 | 2018-10-16 | 洛阳轴承研究所有限公司 | A kind of bearing pair and bearing are to component |
| CN109505872A (en) * | 2017-09-14 | 2019-03-22 | 中国航发商用航空发动机有限责任公司 | Bearing pre-tightening device |
| US10655499B2 (en) * | 2017-12-21 | 2020-05-19 | United Technologies Corporation | Flexible preloaded ball bearing assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191127465A (en) * | 1911-12-07 | 1912-09-05 | Thomas Cooper | Improvements in Thrust Bearings. |
| GB857626A (en) * | 1957-12-21 | 1961-01-04 | Rothe Erde Eisenwerk | Improvements in rotary joints comprising wire-race ball bearings |
| DE3624576A1 (en) * | 1985-07-22 | 1987-01-22 | Alps Electric Co Ltd | ROTATION HEAD MECHANISM |
| CN86108820A (en) * | 1985-12-23 | 1987-06-24 | 株式会社日立制作所 | Rotary brake rigging and preparation method thereof |
| SU1418528A1 (en) * | 1987-01-23 | 1988-08-23 | Предприятие П/Я А-1773 | Shaft bearing |
-
2012
- 2012-03-08 CN CN201210059806.9A patent/CN102588449B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191127465A (en) * | 1911-12-07 | 1912-09-05 | Thomas Cooper | Improvements in Thrust Bearings. |
| GB857626A (en) * | 1957-12-21 | 1961-01-04 | Rothe Erde Eisenwerk | Improvements in rotary joints comprising wire-race ball bearings |
| DE3624576A1 (en) * | 1985-07-22 | 1987-01-22 | Alps Electric Co Ltd | ROTATION HEAD MECHANISM |
| CN86108820A (en) * | 1985-12-23 | 1987-06-24 | 株式会社日立制作所 | Rotary brake rigging and preparation method thereof |
| SU1418528A1 (en) * | 1987-01-23 | 1988-08-23 | Предприятие П/Я А-1773 | Shaft bearing |
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| Publication number | Publication date |
|---|---|
| CN102588449A (en) | 2012-07-18 |
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Address after: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee after: China Hangfa South Industrial Co. Ltd. Address before: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee before: China Southern Airlines Industry (Group) Co., Ltd. |
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