CN102588449A - Axial uniform load device of bearing and matching method thereof - Google Patents

Axial uniform load device of bearing and matching method thereof Download PDF

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Publication number
CN102588449A
CN102588449A CN2012100598069A CN201210059806A CN102588449A CN 102588449 A CN102588449 A CN 102588449A CN 2012100598069 A CN2012100598069 A CN 2012100598069A CN 201210059806 A CN201210059806 A CN 201210059806A CN 102588449 A CN102588449 A CN 102588449A
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China
Prior art keywords
bearing
elastic element
balancing device
axial
axial load
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CN2012100598069A
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CN102588449B (en
Inventor
赵静
曹科名
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AECC South Industry Co Ltd
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China National South Aviation Industry Co Ltd
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Priority to CN201210059806.9A priority Critical patent/CN102588449B/en
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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

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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

The axial load-balancing device and the matching method thereof of bearing
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 the aeroengine main shaft are held, because the power to weight ratio requirement of aeroengine, the radial dimension of bearing is restricted, and therefore, when thrust load is big, needs to bear with a pair of two half inner axles.
Existing technology is through 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.This technology is to the accuracy of manufacturing of bearing, and particularly the height difference of grinding-in outer shroud and interior ring has very high requirement.General, after the elimination 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 big.
Even the two bearings each side all meets the demands, certain foozle is also still arranged in the required precision scope, thereby cause the two bearings thrust load can not realize basically all carrying.This bar is born the life-span of the bearing of heavy load and will be reduced.
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, when solving two bearing cooperatings, bears the unbalanced technical problem of load.
For realizing above-mentioned purpose, according to an aspect of the present invention, a kind of axial load-balancing device of bearing is provided, comprise axle, be sleeved on two bearings on the axle and keep out block at the outer shroud end face of any bearing; Each bearing comprises outer shroud, and the axial load-balancing device of bearing comprises elastic element, and elastic element is installed between the outer shroud end face of outer shroud end face and bearing of bearing.
Further, the axial load-balancing device of bearing also comprises the back-up ring that is sleeved on the axle, and the opposite end surface of back-up ring is replaced 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 a spring.
Further, the interior ring of each bearing comprises half interior ring of two same structures respectively.
According to a further aspect in the invention, a kind of matching method of axial load-balancing device of bearing is provided also, it comprises matches the axial load-balancing device of above-mentioned bearing, may further comprise the steps:
Step S1: the pretightening force F of calculation bearing 0, wherein, pretightening force F 0=(F-2k δ)/2, wherein, F representes the axial work loads of axle under steady-working state, k representes the elasticity coefficient of elastic element, the axial internal clearance value of the bearing that δ representes to keep out each other with block;
Step S2: according to pretightening force F 0With axial internal clearance value δ, confirm elastic element;
Step S3: according to the rigidity and the pretightening force F of elastic element 0, obtain the back-up ring that length is confirmed.
Further, the length of back-up ring and elastic element elastic force equal pretightening force F 0The time length be complementary.
The present invention has following beneficial effect: the axial load-balancing device and the matching method thereof of bearing of the present invention are equipped with elastic element between two bearings; Through calculating the pretightening force F of assembling condition lower bearing 0, the play axle δ in conjunction with this bearing confirms elastic element, the length of the back-up ring of reentrying; After installation of the present invention, two bearings of the present invention can be born the load of identical size, realize all carrying.Manufacture difficulty of the present invention and manufacture cost are all lower, and the equal loading capability and the working life of two bearings all are improved.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification 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 two bearings 2,3 of axle on 1, be installed in two bearings 2, the elastic element between 34, back-up ring 5 and block 6.
In this mode of execution, bearing 2,3 is angular contact ball bearing, and the interior ring of bearing 2,3 comprises half interior ring of two same structures respectively.
Particularly, the two ends of elastic element 4 are installed in respectively on the end face of outer shroud of end face and bearing 3 of outer shroud of bearing 2.Preferably, elastic element 4 is a spring.Back-up ring 5 is sleeved on the axle 1, and the opposite end surface of back-up ring 5 is replaced respectively between the end face of the interior ring of the end face of the interior ring of bearing 2 and bearing 3.
In this mode of execution, block 6 is installed on the outer shroud of bearing 2, with the outer shroud that stops bearing 2 to left movement.In other mode of execution, block 6 also can be contained in the outer shroud of bearing 3, moves right with the outer shroud that stops bearing 3.
Match the elastic element 4 and back-up ring 5 of the axial load-balancing device of above-mentioned bearing, specifically comprise following step:
Step S1: the pretightening force F of calculation bearing 0
F 0＝(F-2kδ)/2，
Wherein, F representes the axial work loads of axle 1 under steady-working state;
K representes the elasticity coefficient of elastic element 4;
The axial internal clearance value of the bearing that δ representes to be connected with block 6.
In this mode of execution, δ representes the axial internal clearance value of bearing 2.
Step S2: according to the pretightening force F of above-mentioned steps S1 calculating 0Play value δ with bearing confirms elastic element 4;
Preferably, in practical application, according to the pretightening force F that obtains 0With the play value δ of bearing, thereby make qualified elastic element 4.
Step S3: the rigidity of the elastic element of confirming according to above-mentioned steps S2 4 and above-mentioned steps S1 calculate preloads F 0, obtain the back-up ring 5 that length is confirmed;
Particularly, compression elastic element 4 makes the elastic force of elastic element 4 equal pretightening force F 0The time, the length of the length of back-up ring 5 and elastic element 4 is complementary.
Behind the elastic element 4 and back-up ring 5 that apolegamy is good above-mentioned, can the axial load-balancing device of bearing of the present invention be installed, concrete installation process is following:
Bearing 2 is installed on the axle 1; The outer shroud that makes bearing 2 is against block 6; The back-up ring of then above-mentioned steps S3 being confirmed 5 is sleeved on the axle 1 with bearing 3 in order; Two ends with elastic element 4 are fixedly mounted on the outer shroud of two bearings 2,3 then, regulate elastic element 4, make the interior ring of two bearings 2,3 push up respectively and keep out circle 5.
The axial load-balancing device of bearing is installed by above-mentioned installation process; The bearing 2,3 of this moment has all received the pressure of elastic element 4; Bearing 2 receives elastic element 4 directions pressure left, and first end of bearing 2 outer shrouds is equipped with block 6, and block 6 stops that the outer shroud of bearing 2 is to left movement; The displaced plate of the interior ring of bearing 2 for the displacement of the outer shroud of bearing 2 to the right, so the pretightening force F that bearing 2 receives 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 bearing 3 receives 02Should be left, the displaced plate of the interior ring of bearing 3 is for the displacement of outer shroud left.Pretightening force F 01, F 02Equal and opposite in direction, in the opposite direction, and all with above-mentioned pretightening force F 0Equal and opposite in direction.
Please combine referring to Fig. 2, use the axial load-balancing device of bearing of the present invention, promptly be:
When axle 1 begins to rotate, axle 1 acts on the interior ring of bearing 3 and the interior ring of bearing 2, and direction left.Along with the increase of axial force F, act on the axial forces of ring in the bearing 2 can be gradually with the pretightening force F of bearing 2 01Be unloaded to 0.In this process, bearing inner ring does not have mobile, and the elastic element decrement is also constant, though so pretightening force F of bearing 2 01Be unloaded to 0 gradually, but the pretightening force F of bearing 3 02Constant.
Axial force F continues to increase the axial force F that bearing 2 receives 1Direction will change; Left the axial force F of direction will make bearing 2 interior ring with axle 1 together to left movement; The moment that the interior ring that drives bearing 2 when axle 1 moves; Axle 1 also drives the pressure that bearing 3 overcomes elastic element 4 and moves along with moving of bearing 2, and the decrement of elastic element 4 increases gradually at this moment.
When the distance of the interior ring motion of bearing 2 equals the axial internal clearance value δ of bearing 2, bearing 2 can not move again.Because the effect of back-up ring 5, bearing 3 also can stop to move, the thrust load F that this moment, bearing 3 received 2Equal the elastic force of elastic element 4, be original pretightening force F 01Reinforcement F with elastic element 4 δSum, 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 bearing 2, reach stable operation point until axial force F.The thrust load F that the bearing 2 of this moment receives 3Be 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, bearing 2 is respectively born half the thrust load with bearing 3, can realize all carrying.
Need to prove that before axial force F did not reach stable work loads, axial force F was a variable that increases gradually.
In other mode of execution, when the direction of axial force F to the right the time, block 6 is installed in the outer shroud of bearing 3, two bearings 2,3 also can realize all carrying axial force F.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. the axial load-balancing device of a bearing comprises: axle (1), be sleeved on two bearings (2,3) on the said axle (1) and keep out the block (6) at any said outer race end face; Each said bearing (2,3) comprises and it is characterized in that outer shroud, and the axial load-balancing device of said bearing comprises elastic element (4), and said elastic element (4) is installed between the outer shroud end face of outer shroud end face and said bearing (3) of said bearing (2).
2. the axial load-balancing device of bearing according to claim 1; It is characterized in that; The axial load-balancing device of said bearing also comprises the back-up ring (5) that is sleeved on the said axle (1), and the opposite end surface of said back-up ring (5) is replaced respectively between the interior ring end face of two said bearings (2,3).
3. the axial load-balancing device of bearing according to claim 1 is characterized in that, the elastic force of said elastic element (4) equals the pretightening force F with said bearing (2,3) 0
4. the axial load-balancing device of bearing according to claim 1 is characterized in that, said elastic element (4) is a spring.
5. the axial load-balancing device of bearing according to claim 1 is characterized in that, the interior ring of each said bearing comprises half interior ring of two same structures respectively.
6. the matching method of the axial load-balancing device of a bearing is characterized in that, the axial load-balancing device of any one bearing of said claim 1 to 5 is matched, and may further comprise the steps:
Step S1: the pretightening force F that calculates said bearing 0, wherein, said pretightening force F 0=(F-2k δ)/2, wherein, F representes said axle (1) axial work loads under steady-working state, k representes the elasticity coefficient of said elastic element (4), the axial internal clearance value of the said bearing that δ representes to keep out each other with said block (6);
Step S2: according to said pretightening force F 0With said axial internal clearance value δ, confirm said elastic element (4);
Step S3: according to the rigidity and the said pretightening force F of said elastic element (4) 0, obtain the said back-up ring (5) that length is confirmed.
7. the matching method of the axial load-balancing device of bearing according to claim 6 is characterized in that, the length of said back-up ring (5) and said elastic element (4) elastic force equal said pretightening force F 0The time length be complementary.
CN201210059806.9A 2012-03-08 2012-03-08 Axial uniform load device of bearing and matching method thereof Active CN102588449B (en)

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CN102588449B CN102588449B (en) 2014-01-15

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103148099A (en) * 2013-03-13 2013-06-12 洛阳轴研科技股份有限公司 Elastic bearing
CN105003550A (en) * 2015-06-03 2015-10-28 陕西航天导航设备有限公司 Novel single inner integral ball bearing assembling device and method
CN105114452A (en) * 2015-08-21 2015-12-02 洛阳轴研科技股份有限公司 Bearing pair and bearing pair assembly
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
EP3502497A1 (en) * 2017-12-21 2019-06-26 United Technologies Corporation Flexible preloaded ball bearing assembly

Citations (5)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103148099A (en) * 2013-03-13 2013-06-12 洛阳轴研科技股份有限公司 Elastic bearing
CN105003550A (en) * 2015-06-03 2015-10-28 陕西航天导航设备有限公司 Novel single inner integral ball bearing assembling device and method
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
CN105114452A (en) * 2015-08-21 2015-12-02 洛阳轴研科技股份有限公司 Bearing pair and bearing pair assembly
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
EP3502497A1 (en) * 2017-12-21 2019-06-26 United Technologies Corporation Flexible preloaded ball bearing assembly
US10655499B2 (en) 2017-12-21 2020-05-19 United Technologies Corporation Flexible preloaded ball bearing assembly

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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.