CN107763074B - Self-lubricating rolling bearing - Google Patents
Self-lubricating rolling bearing Download PDFInfo
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- CN107763074B CN107763074B CN201711146931.2A CN201711146931A CN107763074B CN 107763074 B CN107763074 B CN 107763074B CN 201711146931 A CN201711146931 A CN 201711146931A CN 107763074 B CN107763074 B CN 107763074B
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- oil
- air curtain
- lubricating
- self
- rolling bearing
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention relates to a self-lubricating rolling bearing. The invention arranges the guide surface section which extends to the outside of the coverage range of the high-pressure area of the high-pressure air curtain on the rotating sleeve of the bearing, and the guide surface section is connected with the inclined surface of the rotating ferrule, namely the air curtain inclined surface section positioned in the coverage range of the high-pressure area of the high-pressure air curtain, so that the lubricating oil can not be influenced by the high-pressure air curtain to cause the splashing of the lubricating oil and the noise can not be generated in the splashing process when the lubricating oil is injected to the guide surface section, meanwhile, by utilizing the centrifugal force generated when the rotating ferrule rotates at high speed, the lubricating oil can flow to the air curtain inclined plane section along the guide surface section and can continuously flow to the bearing roller by utilizing the centrifugal force after reaching the air curtain inclined plane section, the whole process avoids the high-pressure air curtain area, meanwhile, the automatic lubrication of the bearing is realized by utilizing centrifugal force, the structure is ingenious, lubricating oil is not wasted, environmental pollution is not caused, and too much noise is avoided.
Description
Technical Field
The invention relates to a self-lubricating rolling bearing.
Background
With the development of the industry, the bearing is developed towards high speed and long service life, for example, in an electric spindle used in the high speed precision machining industry, the bearing needs to have good bearing speed performance and long service life requirement. Under the condition of ultra-high speed, good lubrication is the guarantee of high-speed performance, at present, side oil injection lubrication is mostly adopted for the bearing, as shown in figure 1, the angular contact ball bearing comprises an inner ring 01, an outer ring 02, a retainer 04, a steel ball 03, an inner spacer ring 05 and an outer spacer ring 06, the inner ring 01 is a rotating ring rotating relative to the outer ring 02 and is provided with a rotating ring inclined surface, namely an inner ring inclined surface 011, so that the axial bearing function can be achieved, the outer ring 02 is a static ring static relative to the inner ring 01, for some bearings, the outer ring can be used as the rotating ring, the inner ring can be used as the static ring, the inner spacer ring 05 and the outer spacer ring 06 are arranged on one side of the bearing close to the inner ring inclined surface 011, so that not only can adjacent bearings be isolated, but also oil injection structures such as oil inlet holes. As shown in fig. 2, when the bearing rotates at a super high speed, high-pressure air curtains 07 are formed on two sides of a retainer 04 in an inner cavity of the bearing, and when the lubricating oil 08 injected from an oil inlet 061 is injected from the side, the lubricating oil is blocked by the high-pressure air curtains 07, so that the injected lubricating oil 08 cannot fully enter the bearing, and lubrication starvation is easily caused, and the bearing is finally burnt; aiming at the problem, some factories strongly spray lubricating oil by changing the angle of a nozzle or increasing the oil pressure, so that the quantity of the lubricating oil in the bearing is too much, the heat dissipation is uneven, and the bearing is burnt; in addition, in the above-mentioned method of injecting the lubricating oil from the side, since the high-pressure oil directly collides with the high-pressure air curtain, a strong and harsh sound is generated, which causes serious noise pollution, and the high-pressure oil is also strongly splashed, which not only wastes the lubricating oil but also pollutes the environment.
Disclosure of Invention
The invention aims to provide a self-lubricating rolling bearing which is sufficient in lubrication during high-speed operation, does not waste lubricating oil and is low in noise.
In order to achieve the purpose, the self-lubricating rolling bearing adopts the following technical scheme:
the technical scheme 1: the self-lubricating rolling bearing comprises a rotating ferrule and a static ferrule, wherein a rotating ferrule inclined surface is arranged on the rotating ferrule, the rotating ferrule inclined surface comprises an air curtain inclined surface section and a guide surface section which are connected with each other and are respectively positioned in and out of a high-pressure air curtain cover setting range, and the guide surface section is obliquely arranged to enable lubricating oil on the guide surface section to flow to the air curtain inclined surface section under the action of centrifugal force so that the lubricating oil can flow to the roller to be lubricated along the air curtain inclined surface section under the action of the centrifugal force.
Has the advantages that: the invention arranges the guide surface section which extends to the outside of the coverage range of the high-pressure area of the high-pressure air curtain on the rotating sleeve of the bearing, and the guide surface section is connected with the inclined surface of the rotating ferrule, namely the air curtain inclined surface section positioned in the coverage range of the high-pressure area of the high-pressure air curtain, so that the lubricating oil can not be influenced by the high-pressure air curtain to cause the splashing of the lubricating oil and the noise can not be generated in the splashing process when the lubricating oil is injected to the guide surface section, meanwhile, by utilizing the centrifugal force generated when the rotating ferrule rotates at high speed, the lubricating oil can flow to the air curtain inclined plane section along the guide surface section and can continuously flow to the bearing roller by utilizing the centrifugal force after reaching the air curtain inclined plane section, the whole process avoids the high-pressure air curtain area, meanwhile, the automatic lubrication of the bearing is realized by utilizing centrifugal force, the structure is ingenious, lubricating oil is not wasted, environmental pollution is not caused, and too much noise is avoided.
The technical scheme 2 is as follows: on the basis of the technical scheme 1, the guide surface section is an inner hole surface or a groove wall surface, and the inner hole surface or the groove wall surface is enclosed to form an oil guide channel for passing through lubricating oil.
Technical scheme 3: on the basis of the technical scheme 2, the oil guide channel is a straight channel.
The technical scheme 4 is as follows: on the basis of the technical scheme 3, the oil guide channel is a capillary hole.
The oil guide channel is set to be a capillary hole, has the characteristics of continuous flow and backflow prevention, and is particularly suitable for the application environment of the ultra-high speed bearing.
The technical scheme 5 is as follows: on technical scheme 2's basis, the rotation lasso corresponds guide face department coaxial and is provided with annular oil groove, and the groove edge department of annular oil groove is equipped with the enstrophe oil baffle platform of avoiding lubricating oil to throw away along the cell wall of annular oil groove under the centrifugal force effect.
The setting of oil baffle platform can make the lubricating oil in the annular oil groove can not throw out when rotatory.
The technical scheme 6 is as follows: on the basis of the technical scheme 5, an included angle is formed between the groove wall of the annular oil groove and the inward-turning oil baffle platform, and the oil guide channel is positioned at an included angle.
Because the lubricating oil is accumulated at the included angle, the communicating port is arranged at the included angle, so that the lubricating oil can conveniently enter the oil guide channel under the action of centrifugal force.
The technical scheme 7 is as follows: on the basis of the technical scheme 6, the groove wall of the annular oil groove is obliquely arranged so that lubricating oil on the groove wall flows to the included angle under the action of centrifugal force.
The technical scheme 8 is as follows: on the basis of technical scheme 7, self-lubricating antifriction bearing still include with stationary ring circle fixed connection's spacer ring, be equipped with the inlet port on the spacer ring, the export of inlet port stretches into in the annular oil groove so that for the oil feed of annular oil groove.
Technical scheme 9: on the basis of the technical scheme 8, the outlet of the oil inlet hole is arranged towards the groove wall of the annular oil groove so that the lubricating oil at the outlet is sprayed to the inclined groove wall.
Technical scheme 10: on the basis of any one of the technical schemes 2 to 9, a plurality of oil guide channels are uniformly arranged along the circumferential direction of the rotating ferrule.
This makes the lubrication more uniform.
Technical scheme 11: on the basis of the technical scheme 8 or 9, an air inlet hole for introducing cooling air to cool the bearing is further formed in the spacer ring, an outlet of the air inlet hole is used for aligning to one side, close to the bearing, of the bearing retainer, and the pressure of the cooling air is larger than that of the high-pressure air curtain.
Technical scheme 12: on the basis of the technical scheme 1, the guide surface section is a plane or an arc surface.
Technical scheme 13: on the basis of the technical scheme 12, the guide surface section is a plane, and the inclined angle of the plane is the same as that of the inclined plane section of the air curtain.
Drawings
FIG. 1 is a prior art angular contact ball bearing and lubrication structure thereof;
FIG. 2 is a schematic diagram of air curtain effect when an angular contact ball bearing is operated at high speed and lubricated;
fig. 3 is a schematic structural view of embodiment 1 of the self-lubricating rolling bearing of the present invention; is also a schematic diagram of the lubrication principle under the working condition;
fig. 4 is a schematic structural view of embodiment 2 of the self-lubricating rolling bearing of the present invention;
fig. 5 is a schematic structural view of embodiment 3 of the self-lubricating rolling bearing of the present invention;
fig. 6 is a schematic structural view of a self-lubricating rolling bearing of embodiment 4 of the invention;
in FIGS. 1-2: 01-inner ring, 011-inner ring inclined plane, 02-outer ring, 03-steel ball, 04-retainer, 05-inner spacer ring, 06-outer spacer ring, 061-oil inlet, 07-high pressure air curtain, 08-injected lubricating oil;
in FIGS. 3-6: 1-inner ring, 11-inner ring inclined plane, 2-outer ring, 3-steel ball, 4-retainer, 51-annular oil groove, 52-lubricating oil hole, 53-oil baffle table, 6-outer spacer ring, 61-oil inlet hole, 62-air inlet hole, 7-high pressure air curtain, 8-lubricating oil, m-oil injection area and s-lubricating oil flow direction.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The below-mentioned inclined planes are not limited to straight inclined planes, but refer to continuous transitions and a tendency to incline so that the lubricating oil thereon can flow along the inclined planes to the locations where lubrication is required while rotating.
The outer spacer 6 is annular, and is provided with an oil inlet 61, an inlet of the oil inlet 61 is located on the periphery of the outer spacer 6, and an outlet of the oil inlet 61 is located above the annular oil groove 51 of the inner ring, so that the lubricating oil flowing out from the outlet of the oil inlet 61 can directly flow into the annular oil groove 51. The oil inlet holes 61 are three and are uniformly distributed along the circumferential direction of the outer space ring 6. The outlet of the oil inlet hole 61 is arranged opposite to the oil inlet of the lubricating oil hole 52, so that lubricating oil can more easily enter the lubricating oil hole 52. Wherein the lower half section of the oil inlet 61 is located on a convex column extending in the axial direction, and the convex column extends into the annular oil groove 51. An air inlet 62 is further formed in the outer space ring 6, the extending direction of the air inlet 62 is the same as the extending direction of the oil inlet 61, and the air inlet 62 and the oil inlet are both formed by extending the main body to the axis of the outer space ring 6 and vertically extending the bent section to one side of the bearing inner ring 1 and one side of the bearing outer ring 2. The outlet of the inlet holes 62 is aligned with the area between the cage 4 and the outer ring 2, and since the high-pressure air curtain 7 is generated in this area during high-speed operation, the pressure of the air in the inlet holes 62 should be higher than the pressure of the high-pressure air curtain 7, so that the cooling air can penetrate through the high-pressure air curtain 7 and enter the bearing cavity to cool the bearing cavity.
The lubricating process of the rolling bearing of the invention is as follows: as shown in fig. 3, when the bearing inner ring 1 rotates at a high speed, lubricating oil is sprayed into the annular oil groove 51 through the oil inlet 61, the lubricating oil is located at an included angle between the oil baffle 53 and the inclined surface of the annular oil groove 51, enters the lubricating oil hole 52 under the action of centrifugal force, continues to flow to an oil outlet by taking the centrifugal force as power in the lubricating oil hole 52, because the oil outlet is tightly attached to the upper surface of the inner ring inclined surface 11, the lubricating oil can not only avoid the high-pressure air curtain 7, but also directly flow to the inner ring inclined surface 11, the lubricating oil continues to flow to the steel ball 3 along the inner ring inclined surface 11 under the action of centrifugal force after entering the inner ring inclined surface 11, and then the steel ball 3 throws the lubricating oil to the bearing outer ring 2 under the action. The lubricating oil is injected into the annular oil groove of the bearing inner ring through the outer spacing ring in the angular contact ball bearing, the optimal mode is that the lubricating oil is directly sprayed to the inlet of the lubricating oil hole, the lubricating oil flows to the air curtain inclined plane section on the inner ring along the obliquely arranged oil guide hole under the action of centrifugal force, then the lubricating oil on the air curtain inclined plane section flows to the steel ball along the air curtain inclined plane section by means of the centrifugal force, and then the steel ball throws the lubricating oil to the outer ring of the bearing under the action of the centrifugal force, so that the bearing is lubricated.
And (3) cooling: high-pressure gas is introduced through the gas inlet holes 62, and the high-pressure gas is sprayed out from the gas outlet of the gas inlet holes 62 and then directly penetrates through the high-pressure gas curtain 7 to enter the inner cavity of the bearing, so that the cooling of the bearing is realized.
In other embodiments: the lubricating oil hole as a guide surface for guiding the lubricating oil to the inclined surface of the bearing inner ring is an inner hole surface and can be replaced by a groove wall surface, and at the moment, the oil is guided through the oil guide groove; of course, the guide surface may be replaced by a flat surface, the inclination angle of which may be changed appropriately, but it is necessary to ensure that the lubricant oil thereon can obtain a sufficient flow of centrifugal force when rotating; the guide surface can also be an arc surface, comprising two arc surfaces which are concave and convex, and can also be a wave surface or a step-shaped inclined surface; the diameter of the lubricating oil hole is not limited to 1mm, and can be larger or smaller than 1 mm; the lubricating oil hole can be replaced by an arc hole, a wavy hole and the like; the number of the oil inlet holes can be one, two or more; the number of the air inlet holes can also be one, two or more; for the rolling bearing with the outer ring as the rotating ring, the lubricating spacer ring is an outer spacer ring, and the outer spacer ring is provided with a corresponding annular oil groove and a corresponding lubricating oil hole.
Example 2: as shown in fig. 4, the difference from embodiment 1 is that the guide surface section is a plane or an arc-shaped surface, where the plane may be a plurality of separate planes and arranged at intervals or continuously along the circumferential direction of the inner ring, or may be an annular surface; the cambered surface can be a plurality of independent cambered surfaces which are uniformly arranged along the circumferential direction of the inner ring, and can also be a continuous cambered surface.
When in use: lubricating oil is injected on the guide surface section which leaks outwards through the oil injection device, the lubricating oil on the guide surface section flows to the air curtain inclined surface section connected with the guide surface section along the guide surface section under the action of centrifugal force, the lubricating oil on the air curtain inclined surface section can continuously flow to the steel ball under the action of centrifugal force, because the guide surface section is positioned outside the high-pressure area of the high-pressure air curtain, when the oiling device is adopted to spray lubricating oil to the lubricating oil, the lubricating oil cannot be splashed due to the influence of the high-pressure air curtain, and the noise cannot be generated due to the collision between the high-pressure air curtain and the lubricating oil, the inclined plane section of the air curtain is in the covering range of the high-pressure area of the high-pressure air curtain, but the surface close to the inclined plane section of the air curtain is not influenced by the high-pressure air curtain, therefore, the lubricating oil flowing to the air curtain inclined plane section along the guide surface section can flow to the steel ball by clinging to the surface of the air curtain inclined plane section, and the purpose of lubricating the bearing is achieved.
Example 3: as shown in fig. 5, the difference from embodiment 2 is that the guide surface section and the air curtain slope section have the same inclination angle, which facilitates the processing of the inner ring slope.
Example 4: as shown in fig. 6, the difference from embodiment 2 is that the guide surface section has a smaller angle with the horizontal axis than the air curtain slope section.
In other embodiments: the rotating ferrule can also be an outer ring, and the inclined plane is arranged on the outer ring at the moment; the angular contact ball bearing can be replaced by a high-speed cylindrical roller bearing; the lubricating oil hole as the oil guide channel can be replaced by a channel surrounded by the groove surface; lubricating oil can also be injected onto the inner ring inclined surface by adopting a method that a metal pipe is lapped on the inner ring inclined surface; or the oil inlet hole is arranged on the outer spacer ring, the oil outlet of the oil inlet hole is arranged on the inclined plane clinging to the inner ring, and the oil is directly sprayed on the inclined plane of the inner ring in a spraying mode while the high-pressure air curtain above the inclined plane of the inner ring is avoided.
Claims (11)
1. A self-lubricating rolling bearing comprises a rotating ferrule and a static ferrule, wherein the rotating ferrule is provided with a rotating ferrule inclined surface, and the self-lubricating rolling bearing is characterized in that the rotating ferrule inclined surface comprises an air curtain inclined surface section and a guide surface section which are connected with each other and are respectively positioned in and out of a high-pressure air curtain cover, the guide surface section is obliquely arranged so that lubricating oil on the guide surface section flows to the air curtain inclined surface section under the action of centrifugal force so that the lubricating oil can flow to a roller for lubrication along the air curtain inclined surface section under the action of centrifugal force, the rotating ferrule is an inner ring which comprises an annular body, the annular body comprises two parts which are of an integral structure, the second part extends from one side of the first part with the inclined surface to the axial direction of a rotating shaft, the second part is annular, the rotating ferrule inclined surface is an inner ring inclined surface, and the inner ring inclined surface comprises the air curtain inclined surface section positioned, the periphery of the second part of the inner ring is provided with an annular oil groove, the self-lubricating rolling bearing further comprises a spacer ring fixedly connected with the static ring, an oil inlet hole is formed in the spacer ring, and an outlet of the oil inlet hole extends into the annular oil groove so as to supply oil to the annular oil groove; an air inlet hole for introducing cooling air to cool the bearing is further formed in the separating ring, an outlet of the air inlet hole is used for aligning to one side, close to the bearing, of the bearing retainer, and the pressure of the cooling air is larger than that of the high-pressure air curtain.
2. Self-lubricating rolling bearing according to claim 1, wherein the guiding surface sections are bore surfaces or groove wall surfaces enclosing an oil guiding channel for passing lubricating oil.
3. Self-lubricating rolling bearing according to claim 2, characterized in that the oil-conducting channel is a straight channel.
4. Self-lubricating rolling bearing according to claim 3, characterized in that the oil-conducting channels are capillary holes.
5. The self-lubricating rolling bearing of claim 2 wherein the annular oil groove is coaxially disposed at the corresponding guide surface section of the rotating ring, and an inverted oil retaining land is provided at a groove edge of the annular oil groove to prevent the lubricating oil from being thrown out along the groove wall of the annular oil groove by centrifugal force.
6. The self-lubricating rolling bearing of claim 5 wherein the groove walls of the annular oil groove form an angle with the inverted oil retaining lands, the oil guide channel being located at the included angle.
7. The self-lubricating rolling bearing of claim 6 wherein the groove walls of the annular oil groove are inclined to direct the lubricating oil thereon toward the corners under centrifugal force.
8. The self-lubricating rolling bearing of claim 1, wherein the outlet of the oil inlet hole is disposed toward the groove wall of the annular oil groove so that the lubricant oil of the outlet port is sprayed toward the inclined groove wall.
9. The self-lubricating rolling bearing according to any one of claims 2 to 8, wherein the oil guide passage is provided in plurality and uniformly arranged in a circumferential direction of the rotating ring.
10. Self-lubricating rolling bearing according to claim 1, wherein the guide surface sections are flat or cambered.
11. The self-lubricating rolling bearing of claim 10 wherein the guide surface segments are planar at the same angle as the air curtain ramp segments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146931.2A CN107763074B (en) | 2017-11-17 | 2017-11-17 | Self-lubricating rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146931.2A CN107763074B (en) | 2017-11-17 | 2017-11-17 | Self-lubricating rolling bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107763074A CN107763074A (en) | 2018-03-06 |
| CN107763074B true CN107763074B (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711146931.2A Active CN107763074B (en) | 2017-11-17 | 2017-11-17 | Self-lubricating rolling bearing |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10299784A (en) * | 1997-04-30 | 1998-11-10 | Nippon Seiko Kk | Lubricating device for rolling bearing device |
| JP2001208085A (en) * | 2000-01-26 | 2001-08-03 | Nsk Ltd | Lubrication device for rolling bearing apparatus |
| JP2002130303A (en) * | 2000-10-27 | 2002-05-09 | Nsk Ltd | Bearing device |
| CN201916671U (en) * | 2011-01-24 | 2011-08-03 | 上海特安一凯轴承有限公司 | Rolling bearing vector lubricating device |
| CN104685242A (en) * | 2012-07-09 | 2015-06-03 | 舍弗勒技术股份两合公司 | Rolling bearing for turbocharger |
| CN105829749A (en) * | 2013-12-19 | 2016-08-03 | Gea机械设备有限公司 | Bearing arrangement for centrifuges |
| CN107076212A (en) * | 2014-11-06 | 2017-08-18 | Ntn株式会社 | The cooling construction of bearing arrangement |
| CN207715562U (en) * | 2017-11-17 | 2018-08-10 | 洛阳轴承研究所有限公司 | Self-lubricating bearing |
-
2017
- 2017-11-17 CN CN201711146931.2A patent/CN107763074B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10299784A (en) * | 1997-04-30 | 1998-11-10 | Nippon Seiko Kk | Lubricating device for rolling bearing device |
| JP2001208085A (en) * | 2000-01-26 | 2001-08-03 | Nsk Ltd | Lubrication device for rolling bearing apparatus |
| JP2002130303A (en) * | 2000-10-27 | 2002-05-09 | Nsk Ltd | Bearing device |
| CN201916671U (en) * | 2011-01-24 | 2011-08-03 | 上海特安一凯轴承有限公司 | Rolling bearing vector lubricating device |
| CN104685242A (en) * | 2012-07-09 | 2015-06-03 | 舍弗勒技术股份两合公司 | Rolling bearing for turbocharger |
| CN105829749A (en) * | 2013-12-19 | 2016-08-03 | Gea机械设备有限公司 | Bearing arrangement for centrifuges |
| CN107076212A (en) * | 2014-11-06 | 2017-08-18 | Ntn株式会社 | The cooling construction of bearing arrangement |
| CN207715562U (en) * | 2017-11-17 | 2018-08-10 | 洛阳轴承研究所有限公司 | Self-lubricating bearing |
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| CN107763074A (en) | 2018-03-06 |
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