CN103671508A - Full-complement ceramic ball bearing for aviation turbine engine - Google Patents
Full-complement ceramic ball bearing for aviation turbine engine Download PDFInfo
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- CN103671508A CN103671508A CN201310616650.4A CN201310616650A CN103671508A CN 103671508 A CN103671508 A CN 103671508A CN 201310616650 A CN201310616650 A CN 201310616650A CN 103671508 A CN103671508 A CN 103671508A
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Abstract
The invention belongs to a bearing, and particularly relates to a full-complement ceramic ball bearing for an aviation turbine engine. The full-complement ceramic ball bearing comprises a bearing inner ring and an outer ring, wherein ball bearing channels are formed in the inner ring and the outer ring respectively; and a rolling element is arranged between the two adjacent ball bearing channels and contacted with the ball bearing channels. The full-complement ceramic ball bearing for the aviation turbine engine has the advantages as follows: the density of a silicon nitride ball is 40% of that of a steel ball, the centrifugal force is small during high-speed rotation, the fatigue damage resistance capacity of the bearing is high, and the service life is long; the elasticity modulus of the rolling element is larger than that of steel, the elastic deformation is small, and the dynamic stiffness of the bearing is high; the coefficient of thermal expansion is 1/3-1/4 of that of steel, the size variation is small with temperature variation, and the bearing is applicable to an occasion with large temperature variation; and the bearing has excellent abrasion resistance, higher running accuracy and longer service life, the work is reliable, and the cost is low.
Description
Technical field
The invention belongs to a kind of bearing, specifically relate to full pearl ceramic ball bearing for a kind of aero-turbine.
Background technique
Conventionally, mostly the bearing adopting on aero-turbine is whole metal bearing, but while working under high rotating speed, heavy load, hot environment, Metal Ball is part the weakest in bearing, it is all because steel ball produces due to fatigue ruption in various degree that about 60%～70% high-speed bearing lost efficacy.Obviously, whole metal bearing cannot meet aero-turbine at a high speed, heavy duty, long-lived usage requirement.Therefore ceramic bearing arises at the historic moment, as on February 8th, 2012 the disclosed patent No. be " a kind of High speed Angular Contact Ceramic ceramic ball bearing " of " CN202140423U ", what it adopted is to consist of outer ring, inner ring, retainer, rolling element, the selected material composition of described rolling element is Cr14M04, described outer ring and inner ring adopt Bearing Steel to make, described retainer adopts stainless steel bearing steel wire material, and composition is Cr4M4V.But owing to adopting retainer structure, be difficult for heat radiation, limited serviceability temperature, and complex structure, cost is high.And for example on November 7th, 2012, publication number was " a kind of hybrid ceramic ball bearing " of " CN202520770U ", comprise concentric inner ring and outer ring and nylon cages, nylon cages is provided with some ball pockets, the outer surface of nylon cages is connected with the inner side of outer ring, and two ends, outer ring are respectively equipped with seal ring.By ceramic ball, replace Metal Ball, the Safety performance of bearing is greatly enhanced, and extend working life.But used nylon cages, be not suitable for high temperature, heavy load environment.
Summary of the invention
The object of this invention is to provide a kind of aero-turbine with not containing the full pearl ceramic ball bearing of retainer, meet the requirement of high rotating speed, heavy load, high-temperature for aero-turbine.
The present invention is achieved in that full pearl ceramic ball bearing for a kind of aero-turbine, and it comprises: bearing inner race and outer ring, inner ring and outer ring have respectively ball bearing channel, the rolling element that arranges and contact with the two between ball bearing channel.
The wrapping angle of described bearing is 15 °.
The rib of described outer ring one side is slope form, and the gradient is 2 °～3 °.
Advantage of the present invention is, the density of (1) silicon nitride ball is 40% of steel ball, and while running up, centrifugal force is little, and bearing antifatigue damage capability is strong, and the life-span is long.(2) the modular ratio steel of rolling element is high, and resiliently deformable is little, and the dynamic stiffness of bearing is high.(3) thermal expansion coefficient is steel 1/3～1/4, and temperature variant dimensional changes amount is little, is applicable to the occasion that temperature variation is large.It has good wear resistance, higher running accuracy and longer operating life, functional reliability, and cost is low.
Accompanying drawing explanation
Fig. 1 is full pearl ceramic ball bearing structural representation for a kind of aero-turbine provided by the present invention.
In figure, 1 outer ring, 2 inner rings, 3 rolling elements.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
As shown in Figure 1, full pearl ceramic ball bearing for a kind of aero-turbine, it comprises: bearing inner race 2 and outer ring 1, inner ring 2 and outer ring 1 have respectively ball bearing channel, the rolling element 3 that arranges and contact with the two between ball bearing channel.
This bearing does not have retainer, can pack than the bearing with retainer many ceramic ball into, thereby improve its load carrying capacity.Inside and outside lasso adopts the structural type of integrated type, non-separation, a rib sloping form of outer ring, and the gradient is 2 °～3 °.Bearing adopts back-to-back mounting type, and by the end face of spring compression bearing outer ring, the axial internal clearance of energy self-aligning bearing, because outer ring can not be rotated with axle, can stretch to spring direction the thermal expansion that axle produces when high speed.Inside and outside circle adopts bearing steel material, and ceramic ball can be silicon nitride, also aluminium oxide or zirconia material.
The wrapping angle of this bearing is 15 °.The rib of outer ring one side is processed into slope form, and the gradient is 2 °～3 °.This bearing, for completely filling ball bearing, is not with retainer, and the rolling element number of relative standard's bearing increases to some extent.Inside and outside circle adopts bearing steel material, and after heat treatment, hardness HRC is greater than 56.Rolling element adopts silicon nitride material, also can adopt the stupaliths such as aluminium oxide or zirconium oxide.The grade of accuracy of bearing is P4 level, and the grade of accuracy of ball is G5 level.
The key technical indexes of this ceramic bearing:
1. the circular runout of inner ring: Kia 2.5um
2. the circular runout of outer ring: Kea 5um
3. the axial runout of inner ring: Sia 3um
4. the axial runout of outer ring: Sea 5um
5. radial internal clearance: 15～28um
6. the density of silicon nitride: 3.2～3.3g/cm
3
The present invention has high reliability, long service live, and cost is low, be suitable at the high temperature of motor for aero-turbine, at a high speed, pollute and the bad working environments such as lubricated of limiting the quantity of under work, improved the performance of aero-turbine with motor.The present invention also can be converted into civilian technology, can replace precision, all-steel bearing more than middling speed.
Claims (3)
1. an aero-turbine use expires pearl ceramic ball bearing, it is characterized in that: it comprises: bearing inner race (2) and outer ring (1), inner ring (2) and outer ring (1) have respectively ball bearing channel, the rolling element (3) that arranges and contact with the two between ball bearing channel.
2. full pearl ceramic ball bearing for a kind of aero-turbine as claimed in claim 1, is characterized in that: the wrapping angle of described bearing is 15 °.
3. full pearl ceramic ball bearing for a kind of aero-turbine as claimed in claim 1, is characterized in that: the rib of described outer ring (1) one side is slope form, and the gradient is 2 °～3 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310616650.4A CN103671508A (en) | 2013-11-29 | 2013-11-29 | Full-complement ceramic ball bearing for aviation turbine engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310616650.4A CN103671508A (en) | 2013-11-29 | 2013-11-29 | Full-complement ceramic ball bearing for aviation turbine engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103671508A true CN103671508A (en) | 2014-03-26 |
Family
ID=50310009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310616650.4A Pending CN103671508A (en) | 2013-11-29 | 2013-11-29 | Full-complement ceramic ball bearing for aviation turbine engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103671508A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536152A (en) * | 2020-06-03 | 2020-08-14 | 中国航发哈尔滨轴承有限公司 | High-temperature overturning moment mixed ceramic ball bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548783A (en) * | 2003-05-21 | 2004-11-24 | 上海市轴承技术研究所 | Self-lubricating angle contact ball bearing |
| JP2006328464A (en) * | 2005-05-25 | 2006-12-07 | Nsk Ltd | Rolling bearing, and method for producing rolling component thereof |
| CN2886187Y (en) * | 2005-12-31 | 2007-04-04 | 洛阳轴研科技股份有限公司 | High-temperature deep groove ball bearing |
| CN102359499A (en) * | 2011-10-26 | 2012-02-22 | 中电电机股份有限公司 | Bearing with axial buffer function |
| CN102996625A (en) * | 2012-11-08 | 2013-03-27 | 哈尔滨轴承集团公司 | Thin-wall angular contact full ball bearing and processing method thereof |
-
2013
- 2013-11-29 CN CN201310616650.4A patent/CN103671508A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548783A (en) * | 2003-05-21 | 2004-11-24 | 上海市轴承技术研究所 | Self-lubricating angle contact ball bearing |
| JP2006328464A (en) * | 2005-05-25 | 2006-12-07 | Nsk Ltd | Rolling bearing, and method for producing rolling component thereof |
| CN2886187Y (en) * | 2005-12-31 | 2007-04-04 | 洛阳轴研科技股份有限公司 | High-temperature deep groove ball bearing |
| CN102359499A (en) * | 2011-10-26 | 2012-02-22 | 中电电机股份有限公司 | Bearing with axial buffer function |
| CN102996625A (en) * | 2012-11-08 | 2013-03-27 | 哈尔滨轴承集团公司 | Thin-wall angular contact full ball bearing and processing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536152A (en) * | 2020-06-03 | 2020-08-14 | 中国航发哈尔滨轴承有限公司 | High-temperature overturning moment mixed ceramic ball bearing |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |