CN117231627A - Angular contact ball bearing assembly for protecting magnetic suspension main shaft - Google Patents
Angular contact ball bearing assembly for protecting magnetic suspension main shaft Download PDFInfo
- Publication number
- CN117231627A CN117231627A CN202311224568.7A CN202311224568A CN117231627A CN 117231627 A CN117231627 A CN 117231627A CN 202311224568 A CN202311224568 A CN 202311224568A CN 117231627 A CN117231627 A CN 117231627A
- Authority
- CN
- China
- Prior art keywords
- bearing assembly
- angular contact
- contact ball
- ball bearing
- main shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000725 suspension Substances 0.000 title abstract description 32
- 238000005096 rolling process Methods 0.000 claims abstract description 35
- 230000001050 lubricating effect Effects 0.000 claims abstract description 23
- 230000003139 buffering effect Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 16
- 238000005339 levitation Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 4
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229920002530 polyetherether ketone Polymers 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 claims 3
- 239000000314 lubricant Substances 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000036316 preload Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses an angular contact ball bearing assembly for protecting a magnetic suspension main shaft, which consists of a double-raceway inner ring, a double-half-structure outer ring and a plurality of rolling bodies. The inner surface and the end face of the inner ring are plated with a lubricating layer, so that the abrasion of the magnetic suspension main shaft to the main shaft in a falling instant can be reduced. The outer surface of the outer ring is provided with a buffer layer for buffering instantaneous impact load. Two rows of rolling bodies are arranged between the outer ring and the inner ring, and the bearing can be applied with a preload by pressing the outer ring, so that the bearing has certain radial and axial supporting rigidity, the bearing can have instant high-speed performance, and the service life of the bearing is prolonged. The bearing component adopts a non-full-load rolling body and is of a retainer-free structure, so that the rigidity of the bearing can be improved, and the friction abrasion and heating phenomena between the rolling body and the roller path and between the inner ring and the rotor are prevented. The angular contact ball bearing assembly can meet the instantaneous high-speed and instantaneous high-impact requirements of the magnetic suspension main shaft, and greatly improves the performance barrier and development application of the magnetic suspension main shaft.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to an angular contact ball bearing assembly for protecting a magnetic suspension main shaft.
Background
Along with the increasing maturity of magnetic suspension main shaft technology, the magnetic suspension main shaft application field is also wider and wider, and the magnetic suspension main shaft is increasingly applied to the fields of energy storage industry, semiconductors, compressors, aeroengines and the like at present. The magnetic suspension protection bearing is one of key components of the magnetic suspension main shaft, when the magnetic suspension rotor falls down, the protection bearing is used for limiting the maximum displacement of the rotor in the radial direction and the axial direction, the stator of the magnetic suspension bearing and the stator of the motor are protected from being damaged, the traditional protection bearing cannot support the ultra-high-speed rotor to rotate due to the lower limit rotating speed of the traditional protection bearing, and huge vibration and impact caused by falling down of the rotor are difficult to bear, so that the protection bearing fails. Based on the above, the requirements on the rotating speed and the service life of the magnetic suspension protection bearing in the industry are also higher and higher.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the angular contact ball bearing assembly for protecting the magnetic suspension main shaft, which can meet the instantaneous high-speed requirement and the high impact force requirement of the bearing when the magnetic suspension main shaft falls, reduce the abrasion of the magnetic suspension main shaft and prolong the service life of the magnetic suspension main shaft.
In order to achieve the above purpose, the invention adopts the following specific scheme:
an angular contact ball bearing assembly for magnetic levitation spindle protection comprising:
the inner ring is a double-raceway inner ring, and a layer of lubricating layer is arranged on both end surfaces and the inner surface of the inner ring;
the outer ring is of a double-half outer ring structure which is arranged outside the inner ring side by side, and a buffer layer for buffering instantaneous impact load is arranged on the outer surface of the outer ring;
the rolling bodies are arranged in two rows in a channel formed between the two inner rings and the outer ring respectively, and the two rows of rolling bodies are arranged side by side in a non-full ball mode;
further, the rolling bodies are silicon nitride ceramic balls.
Further, the lubricating layer adopts a soft metal lubricating material layer or a self-lubricating coating.
Further, the soft metal lubricating material is nickel.
Further, the self-lubricating coating is a polytetrafluoroethylene coating.
Further, the thickness of the lubricating layer is 0.02-0.04 mm.
Further, the buffer layer is made of carbon fiber reinforced polyether-ether-ketone material, and the thickness of the buffer layer is 2-3 mm.
Further, the inner ring is in clearance fit with the magnetic suspension main shaft.
Further, let the diameter of the rolling element be D, the clearance L between two adjacent rolling elements satisfies: l > 0.05 x D.
The beneficial effects are that:
1) The angular contact ball bearing assembly comprises a double-raceway inner ring, a double-half-structure outer ring and a plurality of rolling bodies. The inner surface and the end face of the inner ring are plated with a lubricating layer, so that the abrasion of the magnetic suspension main shaft to the main shaft in a falling instant can be reduced. The outer surface of the outer ring is provided with a buffer layer for buffering instantaneous impact load. Two rows of rolling bodies are arranged between the outer ring and the inner ring, and the bearing can be applied with a preload by pressing the outer ring, so that the bearing has certain radial and axial supporting rigidity, meanwhile, the instantaneous high-speed ceramic ball slipping is reduced, the bearing is effectively prevented from being sintered, the bearing can have instantaneous high-speed performance, and the service life of the bearing is prolonged. The bearing assembly adopts a non-full-complement rolling body and is of a retainer-free structure, so that the rigidity of the bearing can be improved, and the phenomena of friction abrasion and heating between the rolling body and the roller path, and between the inner ring and the rotor caused by the blocking of the rolling body when the protection bearing is collided are prevented. The angular contact ball bearing assembly can meet the instantaneous high-speed and instantaneous high-impact requirements of the magnetic suspension main shaft, and greatly improves the performance barrier and development application of the magnetic suspension main shaft.
2) The rolling body adopts the silicon nitride ceramic balls, and has the advantages of low density, high hardness, small high-speed centrifugal force, good wear resistance and better high-speed performance of the bearing; in addition, the ferrule and the rolling body are made of different materials, so that the phenomenon of engagement of the ferrule and the rolling body under the working condition of high speed and high load can be avoided.
3) The polytetrafluoroethylene is adopted as the material of the lubricating layer, the thickness of the coating is 0.02-0.04 mm, and the polytetrafluoroethylene lubricating material has extremely low friction coefficient and has the characteristics of high temperature resistance and corrosion resistance. When the magnetic suspension main shaft falls onto the bearing inner ring, relative sliding is easy to occur between the inner ring and the main shaft due to instantaneous high speed, and the lubricating material can reduce abrasion of the main shaft. The lubricating layer can also be made of soft metal nickel, the thickness of the coating is 0.02-0.04 mm, and the lubricating material has the characteristics of good wear resistance, high temperature resistance and small friction coefficient, and has the same function.
4) The carbon fiber reinforced polyether-ether-ketone material is adopted as the buffer layer, the thickness of the buffer layer is 2-3 mm, and the material has high impact strength and impact energy absorptivity, and can play a role in buffering and damping when the magnetic levitation main shaft falls.
Drawings
FIG. 1 is a schematic view of the structure of a bearing assembly of the present invention.
In the figure: 1. the inner ring, 2, the lubricating layer, 3, the rolling element, 4, the outer ring, 5, buffer layer.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below in connection with specific embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The invention provides an angular contact ball bearing assembly for protecting a magnetic suspension main shaft, referring to fig. 1, the bearing assembly comprises an inner ring 1, an outer ring 4 and rolling bodies 3, and does not comprise a retainer, and the specific structure of the bearing assembly is described in detail below.
The inner ring 1 is a double-raceway inner ring, a lubricating layer 2 with the thickness of 0.02-0.04 mm is arranged on both end surfaces and the inner surface of the inner ring 1, and the lubricating layer 2 can reduce the abrasion of the magnetic suspension main shaft to the magnetic suspension main shaft when the magnetic suspension main shaft falls down instantaneously. The lubricating layer 2 adopts a soft metal lubricating material layer or a self-lubricating coating. When a soft metal lubricating material is adopted, the soft metal lubricating material is nickel; when a self-lubricating coating is used, the self-lubricating coating selected is polytetrafluoroethylene.
The inner ring 1 can be made of GCr15, and has the characteristics of high hardness, good wear resistance, corrosion resistance, high contact fatigue strength and the like, and after heat treatment, the hardness reaches HRc60-64. The inner surface and the end face of the inner ring are provided with a lubricating layer 2 with the thickness of 0.02-0.04 mm.
The outer ring 4 is of a double-half outer ring structure which is arranged outside the inner ring 1 side by side, the outer ring 4 is made of GCr15, and after heat treatment, the hardness reaches HRc60-64. The outer surface of the outer ring 4 is provided with a buffer layer 5 for buffering the instantaneous impact load. The buffer layer 5 is made of carbon fiber reinforced polyether-ether-ketone material, and the thickness of the buffer layer 5 is 2-3 mm.
The rolling bodies 3 are arranged in two rows in a channel formed between the two inner rings 1 and the outer ring 4 respectively, and the two rows of rolling bodies 3 are arranged side by side in a non-full ball mode, namely, the number of full balls is calculated, each row is reduced by 1-2 rolling bodies 3, and gaps among the rolling bodies 3 are ensured to be larger than 0.05 times of the diameter of the rolling bodies 3; the bearing assembly adopts the non-full-complement rolling bodies 3 and is of a cage-free structure, the cage-free structure can avoid the damage of the cage caused by the instantaneous high speed of the bearing, and the arrangement of the non-full balls can prevent the phenomenon of friction and abrasion and heating between the rolling bodies 3 and the rollaway nest, between the inner ring 1 and the rotor caused by the blocking of the rolling bodies 3 when the rolling bodies 3 are collided.
In detail, the rolling elements 3 are silicon nitride ceramic balls.
The bearing assembly applies preload to the bearing by pressing the outer ring 4, the inner ring 1 is in clearance fit with the magnetic suspension main shaft, a shaft shoulder of the magnetic suspension main shaft is opposite to one end face of the inner ring 1, and the shaft shoulder is also in clearance fit with the end face. When the magnetic suspension main shaft falls onto the inner ring 1, the abrasion to the magnetic suspension main shaft can be reduced through the lubricating layer 2, the instantaneous impact load can be reduced through the outer ring 4 and the buffer layer 5, and the rolling bodies 3 can roll in the rollaway nest to run by applying the pre-tightening load, so that the slip rate is reduced, and the service life of the bearing is prolonged.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. All equivalent changes or modifications made according to the essence of the present invention should be included in the scope of the present invention.
Claims (9)
1. An angular contact ball bearing assembly for protecting a magnetic levitation spindle, comprising:
the inner ring is a double-raceway inner ring, and a layer of lubricating layer is arranged on both end surfaces and the inner surface of the inner ring;
the outer ring is of a double-half outer ring structure which is arranged outside the inner ring side by side, and a buffer layer for buffering instantaneous impact load is arranged on the outer surface of the outer ring;
the rolling bodies are arranged in two rows in a channel formed between the two inner rings and the outer ring respectively, and the two rows of rolling bodies are arranged side by side in a non-full ball mode.
2. An angular contact ball bearing assembly for magnetic levitation spindle protection as defined in claim 1, wherein the rolling elements are silicon nitride ceramic balls.
3. An angular contact ball bearing assembly for protecting a magnetic levitation spindle as defined in claim 1, wherein the lubrication layer is a soft metal lubrication material layer or a self-lubrication coating.
4. An angular contact ball bearing assembly for protecting a magnetic levitation spindle as defined in claim 3, wherein the soft metal lubricant is nickel.
5. An angular contact ball bearing assembly for protecting a magnetic levitation spindle as defined in claim 3, wherein said self-lubricating coating is polytetrafluoroethylene.
6. An angular contact ball bearing assembly for protecting a magnetic levitation spindle according to claim 1 or 3, wherein the thickness of the lubricating layer is 0.02-0.04 mm.
7. The angular contact ball bearing assembly for protecting a magnetic levitation spindle according to claim 1, wherein the buffer layer is made of carbon fiber reinforced polyether-ether-ketone material, and the thickness of the buffer layer is 2-3 mm.
8. An angular contact ball bearing assembly for protecting a magnetic levitation spindle as defined in claim 1, wherein the inner race is in clearance fit with the magnetic levitation spindle.
9. An angular contact ball bearing assembly for protecting a magnetic levitation spindle according to claim 1, wherein the diameter of the rolling elements is D, and the gap L between two adjacent rolling elements satisfies: l > 0.05 x D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311224568.7A CN117231627A (en) | 2023-09-21 | 2023-09-21 | Angular contact ball bearing assembly for protecting magnetic suspension main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311224568.7A CN117231627A (en) | 2023-09-21 | 2023-09-21 | Angular contact ball bearing assembly for protecting magnetic suspension main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117231627A true CN117231627A (en) | 2023-12-15 |
Family
ID=89098041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311224568.7A Pending CN117231627A (en) | 2023-09-21 | 2023-09-21 | Angular contact ball bearing assembly for protecting magnetic suspension main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117231627A (en) |
-
2023
- 2023-09-21 CN CN202311224568.7A patent/CN117231627A/en active Pending
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