CN105240405A - Six-oil-cavity static-pressure sliding bearing - Google Patents
Six-oil-cavity static-pressure sliding bearing Download PDFInfo
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- CN105240405A CN105240405A CN201510773269.8A CN201510773269A CN105240405A CN 105240405 A CN105240405 A CN 105240405A CN 201510773269 A CN201510773269 A CN 201510773269A CN 105240405 A CN105240405 A CN 105240405A
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- oil
- static
- pressure
- bearing
- sliding bearing
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- 230000003068 static effect Effects 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 229910000906 Bronze Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000010974 bronze Substances 0.000 claims description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 abstract description 8
- 230000010355 oscillation Effects 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention particularly relates to a six-oil-cavity hydrostatic sliding bearing which comprises a bearing body, wherein the shape of the inner working surface of the bearing body is an ellipse, and a wedge-shaped wavy gap is formed between the bearing body and a main shaft; six static pressure oil cavities are uniformly distributed on the inner surface of the bearing body, namely the included angle of the center lines of two adjacent static pressure oil cavities is 60 degrees; the static pressure oil cavities are in equilateral triangles and are provided with certain depths so as to form static pressure; the static pressure oil cavities are provided with independent oil inlet small holes, and an oil return groove and an oil return small hole are formed between every two adjacent static pressure oil cavities. According to the invention, the number of the oil cavities of the hydrostatic sliding bearing is increased and the shape of the oil cavities of the hydrostatic sliding bearing is optimized by improving the inner surface working profile of the hydrostatic sliding bearing, so that the dynamic characteristics of the hydrostatic sliding bearing can be effectively improved, oil film oscillation and main shaft vibration are inhibited, and the stability of the hydrostatic sliding bearing is improved.
Description
Technical field
The invention provides a kind of six oil pocket static-pressure sliding bearings, belong to sliding bearing technical field.
Background technique
Sliding bearing is widely used in steam turbine, in large size machine tool and ship power transmission system, has bearing capacity large, the advantages such as power consumption is little.Sliding bearing is divided into three kinds according to the formation basic theory of fluid film, i.e. hydrodynamic sliding bearing, hybrid sliding bearing, static-pressure sliding bearing.Hydrodynamic sliding bearing does not have static-pressure oil chamber, cannot carry out ACTIVE CONTROL to it, and hydrodynamic sliding bearing easy unstability when small eccentricity rate.Although hybrid sliding bearing has static-pressure oil chamber, because oil pocket area is little, the area of oil sealing surface is large, and cause dynamic pressure effect strong, its ACTIVE CONTROL effect is also poor, and stability is unsatisfactory.The advantages such as compared with first two bearing, it is high that static-pressure sliding bearing has oil film rigidity, and spindle rotation accuracy is high, and controllability is good.
Although the stability of static-pressure sliding bearing when small eccentricity rate is better, along with the increase of eccentricity, instability speed reduces, and bearing stability is also deteriorated.The safe and reliable operation of bearing is the essential condition ensureing system dynamic performance, once unstability, will bring serious consequence, not only bearing and whole system are damaged, and also may threaten the life safety of operator.Research shows, the interior working surface profile of bearing support, the appropriate design of oil pocket quantity and oil pocket shape, is to improve sliding bearing instability speed, improves the key of bearing working reliability, stability.Current common static-pressure sliding bearing adopts circular work internal surface, the destabilization problems such as whirling motion and oil whip is easily caused when running up, and stability requirement when traditional static-pressure oil chamber number (four) and shape (rectangle oil recess structure) can not meet hydrostatic bearing WITH HIGH-ECCENTRIC, high rotating speed again.
Summary of the invention
In order to solve the problems of the technologies described above, the problem of easy unstability under the present invention is directed to existing static-pressure sliding bearing WITH HIGH-ECCENTRIC, high rotating speed, to working surface shape in bearing, static-pressure oil chamber quantity and shape are improved, propose a kind of six oil pocket static-pressure sliding bearings, be intended to the instability speed improving static-pressure sliding bearing, improve the stability of static-pressure sliding bearing.
The technical solution used in the present invention is:
A kind of six oil pocket static-pressure sliding bearings, comprise bearing support, and the interior working surface shape of described bearing support is oval, forms wedge wave wave-like gap with main shaft; Described bearing support internal surface has been uniformly distributed six static-pressure oil chambers, namely two adjacent static-pressure oil chamber centerlines are 60 °; The shape of described static-pressure oil chamber is equilateral triangle, and described static-pressure oil chamber all has certain degree of depth with this to form static pressure; Described static-pressure oil chamber is provided with independent oil-feed aperture, arranges oil-return groove and oil return aperture between adjacent static-pressure oil chamber.
Wherein, the end of bearing support is provided with Cooling Holes, and bearing is provided with the cooling bath of annular.
Wherein, bearing support adopts steel material, liner tin bronze, and in bearing support, the minor axis of working surface is 70.02mm, and major axis is 70.06mm, completes in the boring of precision machining center; Bearing width is 70mm, and major axis diameter is 70mm; The edge lengths of static-pressure oil chamber equilateral triangle structure is 34.64mm, and the oil pocket degree of depth is 3mm; Oil-feed hole diameter is 9mm; Oil-return groove cornerite is 10 °, groove depth 3mm, and oil return hole diameter is 7mm.
The invention has the beneficial effects as follows:
1, the present invention passes through working surface shape in hydrostatic bearing, and static-pressure oil chamber quantity and shape are optimized design (design improvement all has theoretical foundation), can significantly improve the instability speed of static-pressure sliding bearing, improve the stability of static-pressure sliding bearing.
2, six static-pressure oil chambers of the present invention are equipped with independent oil-feed aperture, conveniently carry out independent fuel feeding to each oil pocket, and can prevent one or several static-pressure oil chambers like this because flow controller fault is without the problem causing bearing failure during oil-feed;
3, being equipped with oil-return groove between two adjacent static-pressure oil chambers of the present invention, is stop influencing each other of adjacent static-pressure oil chamber pressure on the one hand, and the area that can reduce oil sealing surface on the other hand reduces dynamic pressure effect, improves controllability;
4, each oil-return groove center of the present invention arranges oil return aperture, and lubricant oil flow back into fuel tank by oil return aperture, realizes the circulation of lubricant oil.
5, six oil pocket static-pressure sliding bearings of the present invention are applied in unit, can improve antiwhip, the potential safety hazard that abatement apparatus runs, the working life of extension device, and the personal safety etc. that ensure that unit operation personnel.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention six oil pocket static-pressure sliding bearing;
Fig. 2 is after cutting open along A-A line in Fig. 1 and is launched into the structural drawing of plane.
1-bearing support, 2-static-pressure oil chamber, 3-main shaft, 4-oil return aperture, 5-oil-feed aperture, 6-oil-return groove.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail.
See Fig. 1 and Fig. 2, six oil pocket static-pressure sliding bearings of the present invention comprise bearing support 1, and the interior working surface shape of described bearing support 1 is oval, and the wedge wave wave-like gap formed with main shaft 3 not only increases the rigidity of bearing, also improves antiwhip simultaneously.
Described bearing support 1 internal surface six static-pressure oil chambers 2 have been uniformly distributed, research shows: oil pocket number is respectively the static-pressure sliding bearing of six and four, under same structure parameter, the rigidity of six chamber static-pressure sliding bearings and stability are better than rigidity and the stability of four chamber static-pressure sliding bearings, and six chamber bearing flow higher than four chamber bearings, heating problem advantageously under alleviating bearing arrangement high speed, extends the working life of bearing.The shape of described static-pressure oil chamber 2 is equilateral triangles, research shows: be respectively equilateral triangle for oil pocket shape, rectangle, oval, and four of circle kinds of static-pressure sliding bearings, oil pocket shape is that the bearing of equilateral triangle changes oil film pressure gradient due to the optimization of shape, and make the instability speed of this bearing the highest, stability is best.
Described static-pressure oil chamber 2 is provided with independent oil-feed aperture 5, one or several static-pressure oil chambers 2 can be prevented like this because flow controller fault is without the problem causing bearing failure during oil-feed, so the quantity increasing described static-pressure oil chamber 2 also improves the Security of bearing from this respect; Oil-return groove 6 and oil return aperture 4 are set between adjacent static-pressure oil chamber 2, are conducive to lubricant oil like this and flow back to fuel tank.
Work at high speeds to allow bearing, lubricant oil and bearing support 1 is avoided to generate heat seriously, ensure the kinetic viscosity that lubricant oil remains higher, Security during raising static-pressure sliding bearing high speed operation and stability, the end of described bearing support 1 is provided with Cooling Holes (not shown), bearing is provided with the cooling bath (not shown) of annular, by injecting cooling water at Cooling Holes, cooling water, at cooling bath internal circulation flow, can reduce the temperature of lubricant oil and bearing support 1.
Further, bearing support 1 adopts steel material, liner tin bronze, and in bearing support 1, the minor axis of working surface is 70.02mm, and major axis is 70.06mm, completes in the boring of precision machining center.Bearing width is 70mm, and main shaft 3 diameter is 70mm.The edge lengths of static-pressure oil chamber 2 equilateral triangle structure is 34.64mm, and the oil pocket degree of depth is 3mm.Oil-feed aperture 5 diameter is 9mm.Oil-return groove 6 cornerite is 10 °, groove depth 3mm, and oil return aperture 4 diameter is 7mm.Process six oil pocket static-pressure sliding bearings according to these process parameters, then by carrying out suitable control to charge oil pressure, the vibration of main shaft when high rotating speed can be reduced, improve the instability speed of bearing arrangement, obviously improve the stability of static-pressure sliding bearing.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. six oil pocket static-pressure sliding bearings, is characterized in that: comprise bearing support (1), and the interior working surface shape of described bearing support (1) is oval, forms wedge wave wave-like gap with main shaft (3); Described bearing support (1) internal surface has been uniformly distributed six static-pressure oil chambers (2), namely two adjacent static-pressure oil chamber (2) centerlines are 60 °; The shape of described static-pressure oil chamber (2) is equilateral triangle, and described static-pressure oil chamber (2) all has certain degree of depth with this to form static pressure; Described static-pressure oil chamber (2) is provided with independent oil-feed aperture (5), arranges oil-return groove (6) and oil return aperture (4) between adjacent static-pressure oil chamber (2).
2. a kind of six oil pocket static-pressure sliding bearings according to claim 1, is characterized in that: the end of bearing support (1) is provided with Cooling Holes, and bearing is provided with the cooling bath of annular.
3. a kind of six oil pocket static-pressure sliding bearings according to claim 1, it is characterized in that: bearing support (1) adopts steel material, liner tin bronze, and the minor axis of bearing support (1) interior working surface is 70.02mm, major axis is 70.06mm, completes in the boring of precision machining center; Bearing width is 70mm, and main shaft (3) diameter is 70mm; The edge lengths of static-pressure oil chamber (2) equilateral triangle structure is 34.64mm, and the oil pocket degree of depth is 3mm; Oil-feed aperture (5) diameter is 9mm; Oil-return groove (6) cornerite is 10 °, groove depth 3mm, and oil return aperture (4) diameter is 7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510773269.8A CN105240405A (en) | 2015-11-13 | 2015-11-13 | Six-oil-cavity static-pressure sliding bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510773269.8A CN105240405A (en) | 2015-11-13 | 2015-11-13 | Six-oil-cavity static-pressure sliding bearing |
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| Publication Number | Publication Date |
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| CN105240405A true CN105240405A (en) | 2016-01-13 |
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| CN201510773269.8A Pending CN105240405A (en) | 2015-11-13 | 2015-11-13 | Six-oil-cavity static-pressure sliding bearing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673691A (en) * | 2016-03-30 | 2016-06-15 | 广西恒达电机科技有限公司 | Motor high-pressure oil film floating bearing |
| CN106050910A (en) * | 2016-06-02 | 2016-10-26 | 扬州大学 | Static pressure ball combined bearing |
| CN108971528A (en) * | 2018-07-23 | 2018-12-11 | 安徽工程大学 | A kind of machine tool chief axis utilizes the self centering method and device thereof of sliding bearing |
| CN109899391A (en) * | 2019-04-01 | 2019-06-18 | 哈尔滨理工大学 | A kind of double square chamber static-pressure sliding bearing oil outlet location determining method |
| CN112727925A (en) * | 2020-12-09 | 2021-04-30 | 北京科技大学 | Asymmetric air bearing for built-in pitching mechanism |
| CN114623160A (en) * | 2022-03-25 | 2022-06-14 | 西安热工研究院有限公司 | Hybrid bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3703322A (en) * | 1970-09-23 | 1972-11-21 | Skf Ind Trading & Dev | Hydrostatic bearing |
| JPS5256246A (en) * | 1975-11-05 | 1977-05-09 | Agency Of Ind Science & Technol | High speed thust bearing |
| CN201236887Y (en) * | 2008-08-15 | 2009-05-13 | 西安交通大学 | Ring groove cooling water lubricated dynamic-static high-speed bearing |
| CN101975225A (en) * | 2010-09-29 | 2011-02-16 | 山东大学 | Static pressure sliding bearing with control oil chambers |
| CN205101400U (en) * | 2015-11-13 | 2016-03-23 | 青岛理工大学 | Six-oil-cavity static-pressure sliding bearing |
-
2015
- 2015-11-13 CN CN201510773269.8A patent/CN105240405A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3703322A (en) * | 1970-09-23 | 1972-11-21 | Skf Ind Trading & Dev | Hydrostatic bearing |
| JPS5256246A (en) * | 1975-11-05 | 1977-05-09 | Agency Of Ind Science & Technol | High speed thust bearing |
| CN201236887Y (en) * | 2008-08-15 | 2009-05-13 | 西安交通大学 | Ring groove cooling water lubricated dynamic-static high-speed bearing |
| CN101975225A (en) * | 2010-09-29 | 2011-02-16 | 山东大学 | Static pressure sliding bearing with control oil chambers |
| CN205101400U (en) * | 2015-11-13 | 2016-03-23 | 青岛理工大学 | Six-oil-cavity static-pressure sliding bearing |
Non-Patent Citations (3)
| Title |
|---|
| 彭蕾等: "液体动静压轴承的油腔结构特性分析", 《科技视界》 * |
| 梁东明: "大型球磨机静压轴承的承载能力分析及结构参数优化", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ》 * |
| 郭力等: "不同油腔形状的高速动静压轴承研究", 《磨床与磨削》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673691A (en) * | 2016-03-30 | 2016-06-15 | 广西恒达电机科技有限公司 | Motor high-pressure oil film floating bearing |
| CN105673691B (en) * | 2016-03-30 | 2018-09-14 | 广西恒达电机科技有限公司 | A kind of motor high pressure oil film floating bearing |
| CN106050910A (en) * | 2016-06-02 | 2016-10-26 | 扬州大学 | Static pressure ball combined bearing |
| CN108971528A (en) * | 2018-07-23 | 2018-12-11 | 安徽工程大学 | A kind of machine tool chief axis utilizes the self centering method and device thereof of sliding bearing |
| CN109899391A (en) * | 2019-04-01 | 2019-06-18 | 哈尔滨理工大学 | A kind of double square chamber static-pressure sliding bearing oil outlet location determining method |
| CN109899391B (en) * | 2019-04-01 | 2020-07-24 | 哈尔滨理工大学 | Method for determining oil outlet position of static-pressure sliding bearing with double rectangular cavities |
| CN112727925A (en) * | 2020-12-09 | 2021-04-30 | 北京科技大学 | Asymmetric air bearing for built-in pitching mechanism |
| CN114623160A (en) * | 2022-03-25 | 2022-06-14 | 西安热工研究院有限公司 | Hybrid bearing |
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Application publication date: 20160113 |