CN202215581U - High-speed machine tool main shaft bearing with ceramic balls in angular contact with each other - Google Patents
High-speed machine tool main shaft bearing with ceramic balls in angular contact with each other Download PDFInfo
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- CN202215581U CN202215581U CN2011203360299U CN201120336029U CN202215581U CN 202215581 U CN202215581 U CN 202215581U CN 2011203360299 U CN2011203360299 U CN 2011203360299U CN 201120336029 U CN201120336029 U CN 201120336029U CN 202215581 U CN202215581 U CN 202215581U
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- main shaft
- shaft bearing
- bearing
- ceramic ball
- machine tool
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Abstract
A high-speed machine tool main shaft bearing with ceramic balls in angular contact with each other comprises an outer ring and an inner ring, wherein rolling bodies, which are silicon nitride ceramic balls, are uniformly arranged between the inner ring and the outer right, and are separated from each other through a holding rack; the inner ring and the outer ring are made of No. SKF-3 steel; and the holding rack is made of ceramic fiber. The No. SKF-3 steel has low oxygen content, thereby having high stability after heat treatment; as the rolling bodies are a large quantity of small silicon nitride ceramic balls, the rigidity can be improved, and the idling of the silicon nitride ceramic balls is smaller; as the silicon nitride ceramic balls has higher rolling property, when the main shaft bearing operation under an inclined state, only lower interior stress can be caused; and as the holding rack is made of ceramic fiber with low density and light mess, during the rotation of the main shaft bearing, the centrifugal force is low, the anti-fatigue capability is strong, the rotational speed is high, the high-temperature resistance is realized, the noise is small, the temperature rise is low, and the precision is high.
Description
Technical field
The utility model relates to a kind of bearing, particularly a kind of ceramic ball angle contacting high-speed machine tool main shaft bearing.
Background technique
There is the place of mechanical motion that bearing is just arranged.Bearing is the key foundation member of various mechanized equipments, in order to balance exercise, transmitted load, reduce friction, reduce energy consumption.Advanced bearing is that design-material-manufacturing three-in-one technology is integrated.Three key elements are of equal importance, the integrated high-performance bearing that produces.Though that traditional angular contact ball precision bearing has possessed is simple in structure, limit speed is than advantage such as higher, that friction torque is smaller, this does not reach people's requirement far away along with the development of society.
The employed rolling element of China's bearing industry (particularly steel ball) the material overwhelming majority adopts hot rolling dish circle as mother metal at present, processes the cold-drawn material of required size requirement through annealing → cold-drawn.If do not control the rank of organizing of Carbide network in the hot rolling dish roundwood material, in annealing process subsequently, can't improve yet.As do not add control, and not only cause a large amount of waste products, also reduce the crushing load and the working life of steel ball.
Summary of the invention
The utility model provides a kind of ceramic ball angle contacting high-speed machine tool main shaft bearing, to solve the technical problem that exists in the above-mentioned background technology.
For solving the problems of the technologies described above; A kind of ceramic ball angle contacting high-speed machine tool main shaft bearing of the utility model comprises outer ring and inner ring, and rolling element is arranged between said inner ring and the outer ring uniformly; Retainer is separated said rolling element uniformly, and said rolling element adopts silicon nitride ceramic ball.
Wherein, the SKF-3# steel is adopted in said inner ring and outer ring.
Wherein, said retainer adopts ceramic fiber.
Wherein, said rolling element number is 20.
Wherein, said rolling element diameter is 22.225mm.
Wherein, said ceramic ball bearing load is 10KN.
Wherein, said ceramic ball bearing is of a size of 130*200*30mm.
The utility model is through technique scheme, overcome traditional precision bearing life-span low, feel is poor, noise is big and shortcoming such as non-refractory because ceramic ball bearing has less centrifugal force, this has improved the life-span of bearing greatly, the raising mechanical property.Under the same conditions, can use the longer time.Ceramic bearing can also be worked under-180 ℃～800 ℃ condition, and this makes the working environment of ceramic bearing enlarge, and uses more extensive; Also have in addition to revolve and roll than little, advantages such as rigidity is high, ball idle running is less, low friction and low temperature rise, antifriction performance is good, the bearing accuracy maintenance is good, physical and chemical performance is stable.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 be ceramic ball bearing and the steel bearing of the utility model revolve roll than comparison.Wherein dw is sphere diameter (a rolling element diameter), and Z is nodule number (being the number of rolling element), and Fa is a load.
Fig. 3 is the comparison of ceramic ball bearing rigidity and steel bearing rigidity.
Fig. 4 is the idle capability schematic representation of ceramic ball bearing.I represents the steel bearing, and II represents ceramic ball bearing, and the implication of this figure is that ceramic ball idle running is less; Turn round under heeling condition like bearing; Because ceramic ball has rolling characteristic preferably, the adverse effect of the idle running of ceramic ball is less than steel ball, and the internal stress that causes is also lower.
Fig. 5 is the comparison of ceramic ball bearing and steel bearing frictional torque and temperature rise.I represents the steel bearing, and II represents ceramic ball bearing, and the longitudinal axis on the right is a temperature; The implication of this figure is the low friction and the low temperature rise of ceramic ball bearing, and the Young's modulus that ceramic ball is high is under bearing load; The pressure ellipse that forms is little; Pressure angular difference between inner ring and the outer ring is little, and ceramic ball bearing has lower friction torque when high speed, and friction and temperature rise are lower.
Fig. 6 is the comparison of ceramic ball bearing silicon nitride material and Bearing Steel high temperature hardness.
Description of reference numerals
The 1-outer ring; The 2-inner ring; The 3-retainer; The 4-rolling element.
Embodiment
Can be understood better for the shape, structure and the characteristics that make the utility model, below will enumerate preferred embodiment and combine accompanying drawing to be elaborated.
Fig. 1 is the structural representation of the utility model, and is as shown in the figure, and outer ring 1 normally becomes transition fit with bearing saddle bore, plays a supportive role; Inner ring 2 common and axle drive fits, and rotate together with the axis; Rolling element 4 is arranged between inner ring and the outer ring by retainer uniformly, and the shape of rolling element 4, size and quantity directly influence the load carrying capacity and the usability of bearing; Retainer 3 is separated rolling element 4 uniformly, and can guide rolling element 4 rotations and improve bearing internal lubrication performance.
The inner ring 2 of the utility model adopts GCr 15 steel to change into outer ring 1 by tradition and adopts the SKF-3# steel; Rolling element 4 changes the employing silicon nitride ceramic ball into by the steel ball that tradition adopts the GCr15 steel to process; Retainer 3 adopts the phenolic aldehyde adhesive plaster to change the employing ceramic fiber into by tradition, thereby makes the precision machine tool main shaft bearing have light weight, performance such as high temperature resistant, corrosion-resistant.Wherein ceramic ball rolling element number is preferably Z=20, and the rolling element diameter is sphere diameter dw=22.225mm, ceramic ball bearing load Fa=10KN, and ceramic ball bearing is of a size of 130*200*30mm.
The advantage that assembly had after more than improving is following:
Bearing outer ring 1 is selected the SKF-3# steel for use with inner ring 2: oxygen content is low in the steel, after heat treatment good stability.
Rolling element 4 adopts silicon nitride ceramic ball: adopt little and many ceramic ball rolling element can reach the effect that improves rigidity.Ceramic ball idle running is less, turns round under heeling condition like bearing, because of ceramic ball has rollability preferably, so the internal stress that causes is lower.
The ceramic ball angle contacting high-speed machine tool main shaft bearing of the utility model and the characteristic of traditional precision bearing relatively see the following form
What following table showed is the characteristic comparison of ceramic bearing and plain bearing, particularly rolling element employing Si
3N
4Adopt the characteristic of GCr15 to compare with tradition.Because processing technology is at Si
3N
4Or also can contain a certain proportion of SiC, ZrO in the GCr15 rolling element
2And Al
2O
3
The utility model is through technique scheme, overcome traditional precision bearing life-span low, feel is poor, noise is big and shortcoming such as non-refractory because ceramic ball bearing has less centrifugal force, this has improved the life-span of bearing greatly, the raising mechanical property.Under the same conditions, can use the longer time.Ceramic bearing can also be worked under-180 ℃～800 ℃ condition, and this makes the working environment of ceramic bearing enlarge, and uses more extensive; Also have in addition to revolve and roll than little, advantages such as rigidity is high, ball idle running is less, low friction and low temperature rise, antifriction performance is good, the bearing accuracy maintenance is good, physical and chemical performance is stable.
More than be illustrative to the description of the utility model; And it is nonrestrictive; Those skilled in the art is understood, and within spirit that claim limits and scope, can carry out many modifications, variation or equivalence to it, but they will fall in the protection domain of the utility model all.
Claims (7)
1. a ceramic ball angle contacting high-speed machine tool main shaft bearing is characterized in that, comprise outer ring and inner ring, rolling element is arranged between said inner ring and the outer ring uniformly, and retainer is separated said rolling element uniformly, and said rolling element adopts silicon nitride ceramic ball.
2. ceramic ball angle contacting high-speed machine tool main shaft bearing as claimed in claim 1 is characterized in that, the SKF-3# steel is adopted in said inner ring and outer ring.
3. ceramic ball angle contacting high-speed machine tool main shaft bearing as claimed in claim 1 is characterized in that, said retainer adopts ceramic fiber.
4. ceramic ball angle contacting high-speed machine tool main shaft bearing as claimed in claim 1 is characterized in that said rolling element number is 20.
5. ceramic ball angle contacting high-speed machine tool main shaft bearing as claimed in claim 1 is characterized in that said rolling element diameter is 22.225mm.
6. ceramic ball angle contacting high-speed machine tool main shaft bearing as claimed in claim 1 is characterized in that said ceramic ball bearing load is 10KN.
7. ceramic ball angle contacting high-speed machine tool main shaft bearing as claimed in claim 1 is characterized in that said ceramic ball bearing is of a size of 130*200*30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203360299U CN202215581U (en) | 2011-09-08 | 2011-09-08 | High-speed machine tool main shaft bearing with ceramic balls in angular contact with each other |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203360299U CN202215581U (en) | 2011-09-08 | 2011-09-08 | High-speed machine tool main shaft bearing with ceramic balls in angular contact with each other |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202215581U true CN202215581U (en) | 2012-05-09 |
Family
ID=46014839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203360299U Expired - Fee Related CN202215581U (en) | 2011-09-08 | 2011-09-08 | High-speed machine tool main shaft bearing with ceramic balls in angular contact with each other |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202215581U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359484A (en) * | 2011-09-08 | 2012-02-22 | 哈尔滨新哈精密轴承股份有限公司 | Ceramic ball angular contact high-speed machine tool main shaft bearing |
| CN106151285A (en) * | 2016-08-26 | 2016-11-23 | 杨帆 | A kind of internal combustion engine bearing |
-
2011
- 2011-09-08 CN CN2011203360299U patent/CN202215581U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359484A (en) * | 2011-09-08 | 2012-02-22 | 哈尔滨新哈精密轴承股份有限公司 | Ceramic ball angular contact high-speed machine tool main shaft bearing |
| CN106151285A (en) * | 2016-08-26 | 2016-11-23 | 杨帆 | A kind of internal combustion engine bearing |
| CN106151285B (en) * | 2016-08-26 | 2018-05-11 | 山东文远石油装备有限责任公司 | A kind of internal combustion engine bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20200908 |