CN103115072B - A kind of sealing configuration of oil-lubricated bearing - Google Patents
A kind of sealing configuration of oil-lubricated bearing Download PDFInfo
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- CN103115072B CN103115072B CN201310046832.2A CN201310046832A CN103115072B CN 103115072 B CN103115072 B CN 103115072B CN 201310046832 A CN201310046832 A CN 201310046832A CN 103115072 B CN103115072 B CN 103115072B
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- bearing
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Abstract
The present invention relates to technical field of sealing technology, especially for the sealing configuration of oil-lubricated bearing, solve the sealing problem of high speed oil-lubricated bearing.Sealing structure comprises internal bearing cover (3) and the first Sealing (8), described first Sealing (8) comprises impeller (9) and Sealing matrix, first Sealing (8) is sleeved in rotating shaft (10), internal bearing cover (3) is sleeved on the Sealing matrix of the first Sealing (8), internal bearing cover (3) arranges left cavity and right cavity, cavity on the right cavity of internal bearing cover (3) and bearing support (2) forms bearing chamber (5), the left cavity of internal bearing cover (3) and the cavity of the second Sealing (12) end form Seal cage (6), form seal clearance (7) between multiple annular grooves on internal bearing cover (3) and Sealing matrix, multiple annular groove of the second Sealing and the left cavity inner circumferential of internal bearing cover (3) form seal clearance (13).
Description
Technical field:
The present invention relates to technical field of sealing technology, especially for the sealing configuration of oil-lubricated bearing, be applicable to the multiple applications such as high-speed electric expreess locomotive.
Background technique:
Bearing generally adopts grease lubrication and oil lubrication two kinds of lubricating systems, and relative to grease lubrication, oil lubrication mode has better lubrication effect.The encapsulating method that oil-lubricated bearing is conventional has: contact seal, labyrinth seal.Wherein owing to there is friction in contact seal, reduces the working life of Sealing, and when vibrating comparatively greatly or rotating speed is higher, sealing effect reduces greatly, and its application limits by the highest running speed.Labyrinth seal belongs to non-contact seals mode, concrete structure kind is a lot, and simple labyrinth seal structure seal leakage amount is comparatively large, and complex maze structure has better sealing effect, but greatly can increase manufacture difficulty, and the quality of labyrinth effect can be subject to the impact of the machining accuracy of Sealing.
Summary of the invention:
The invention provides a kind of sealing configuration of oil-lubricated bearing, under solving high speed operation condition, oil leak amount is large, easily enters the deficiency that inner chamber pollutes electric component, improves the reliability of oil-lubricated bearing when high speed operation.
Technological scheme of the present invention is, a kind of sealing configuration of oil-lubricated bearing comprises internal bearing cover and the first Sealing; Described first Sealing comprises impeller and Sealing matrix, and impeller welding is in Sealing matrix one end, and there is multiple annular groove Sealing matrix the other end periphery, and the plurality of annular groove distributes successively along Sealing matrix axial direction; Impeller is made up of multiple blade, and multiple blade is uniformly distributed along Sealing base circumferential direction, and the first sealing member sheathing in rotating shaft, and is fixedly connected with rotating shaft, and blade face is to inner chamber; Internal bearing cover is sleeved on the Sealing matrix of the first Sealing, and be fixedly mounted on bearing support, bearing support is fixed on end cap, internal bearing cover two ends respectively arrange a cavity, i.e. left cavity and right cavity, cavity on the right cavity of internal bearing cover and bearing support forms bearing chamber, and the left cavity of internal bearing cover and the cavity of the second seal ends form Seal cage; Seal clearance is formed between multiple annular grooves on internal bearing cover and Sealing matrix, second sealing member sheathing is in rotating shaft, and be positioned at the left cavity of the first Sealing, and vane edge is close to the left cavity wall of the second Sealing, the periphery of the second Sealing arranges multiple annular groove, multiple annular groove of the second Sealing and the left cavity inner circumferential of internal bearing cover form seal clearance, second Sealing is provided with multiple inlet hole in the axial direction, multiple inlet hole is along the circumferential direction uniformly distributed, and multiple inlet hole is relative with the narrow end of multiple blades of impeller; Internal bearing cover radially has a regulator hole, the through Seal cage of regulator hole and inner chamber; Internal bearing cover and end cap are equipped with vent, and inner chamber is communicated with bearing chamber by vent.
The shape that during blade has, narrow-minded outer rim is wide, to be namely positioned at impeller central end narrow for blade, wide away from impeller central end.
Described seal clearance is of a size of 0.1 ~ 0.5mm.
The invention has the beneficial effects as follows, 1) the present invention adopts gas pressure sealing means, and leakage rate is little, and sealing effect is good; 2) the invention belongs to non-contact seals form, without wearing and tearing, long service life, reliability is high; 3) the present invention is not by the impact of rotating speed height, is specially adapted to high-speed bearing sealing applications; 4) structure of the present invention is simple, is easy to processing and installs, and application prospect is extensive.
Accompanying drawing illustrates:
The sealing configuration partial view of Fig. 1 oil-lubricated bearing of the present invention;
Air flow direction schematic diagram in Fig. 2 the present invention;
Vent path schematic diagram in Fig. 3 the present invention;
In figure: 1 end cap; 2 bearing supports; 3 internal bearing covers; 4 bearings; 5 bearing chambers; 6 Seal cages; 7 first seal clearances; 8 first Sealings; 9 impellers; 10 rotating shafts; 11 inlet holes; 12 second Sealings; 13 second seal clearances; 14 regulator holes; 15 inner chambers; 16 vents.
Embodiment:
The present invention is axially symmetric structure, and Figure 1 shows that a part for symplex structure of the present invention, below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figure 1, the sealing configuration of a kind of oil-lubricated bearing of the present invention comprises internal bearing cover 3, first Sealing 8, second Sealing 12.
First Sealing 8 comprises impeller 9 and Sealing matrix, and impeller 9 is welded on Sealing matrix one end, and there is multiple annular groove Sealing matrix the other end periphery, and multiple annular groove distributes successively along Sealing matrix axial direction.Impeller 9 is made up of multiple blade, and multiple blade is uniformly distributed along Sealing base circumferential direction.The shape that during blade has, narrow-minded outer rim is wide, to be namely positioned at impeller central end narrow for blade, wide away from impeller central end, is preferably trapezoidal.
First Sealing 8 is sleeved in rotating shaft 10, and is fixedly connected with rotating shaft 10, and blade face is to inner chamber 15.Internal bearing cover 3 is sleeved on the Sealing matrix of the first Sealing 8, and is fixedly mounted on bearing support 2, and bearing support 2 is fixed on end cap 1.Internal bearing cover 3 two ends respectively arrange a cavity, i.e. left cavity and right cavity, left cavity and right cavity are respectively used to form Seal cage 6 and bearing chamber 5, and the cavity namely on the right cavity of internal bearing cover 3 and bearing support 2 forms bearing chamber 5, bearing chamber 5 is connected with bearing face, is mainly used in storing lubricant oil; The left cavity of internal bearing cover 3 and the cavity of the second Sealing 12 end form Seal cage 6.Form seal clearance 7 between multiple annular grooves on internal bearing cover 3 and Sealing matrix, seal clearance 7 is also the path of sealing air stream, i.e. communication seals chamber 6 and bearing chamber 5.Seal clearance 7 size is selected according to bearing bore diameter size, and preferably span is 0.1 ~ 0.5mm.
Second Sealing 12 is sleeved in rotating shaft 10, and is positioned at the left cavity of the first Sealing 8, and vane edge is close to the left cavity wall of the second Sealing 12.The periphery of the second Sealing 12 arranges multiple annular groove, and the plurality of annular groove and the left cavity inner circumferential of internal bearing cover 3 form seal clearance 13, thus inner chamber 15 and Seal cage 6 are isolated by labyrinth seal clearance 13, can reduce Leakage Gas, play auxiliary seal effect.Second Sealing 12 is provided with multiple inlet hole 11 in the axial direction, multiple inlet hole 11 is along the circumferential direction uniformly distributed, multiple inlet hole 11 is relative with the narrow end of multiple blades of impeller 9, and be convenient to inner chamber 15 gas and enter Seal cage 6 by inlet hole 11, impeller 9 is for generation of blast.
Internal bearing cover 3 radially has a regulator hole 14, the through Seal cage 6 of regulator hole 14 and inner chamber 15, Main Function makes the air in Seal cage 6 directly get back to inner chamber 15, forms the airflow circulating loop of inner chamber 15 → inlet hole 11 → Seal cage 6 → regulator hole 14 → inner chamber 15.By changing regulator hole 14 size, the adjustment to Seal cage 6 internal pressure can be realized, thus obtain the pressure difference with optimal seal effect.
As shown in Figure 3, internal bearing cover 3 and end cap 1 are equipped with vent 16, inner chamber 15 is communicated with bearing chamber 5 by vent 16, thus forms the sealing air-flow circulation loop with inner chamber 15 → inlet hole 11 → Seal cage 6 → seal clearance 7 → bearing chamber 5 → vent 16 → inner chamber 15.
Working procedure of the present invention is, impeller 9 is followed rotating shaft 10 and is rotated generation blast, and the air in inner chamber 15 by inlet hole 11 suction seal chamber 6, causes Seal cage 6 internal pressure higher than bearing chamber 5 by blast, mineralization pressure is poor, thus produces air stream in gap between Seal cage 6 and bearing chamber 5.Utilize the air stream in gap that the lubricant oil in bearing chamber 5 can be stoped to enter inner chamber 15, realize the sealing to oil-lubricated bearing.
Sealing means of the present invention can effectively stop the lubricant oil of bearing 4 to carry out, in inner chamber 15, playing good sealing effect.
Claims (3)
1. a sealing configuration for oil-lubricated bearing, is characterized in that: sealing structure comprises internal bearing cover (3) and the first Sealing (8), described first Sealing (8) comprises impeller (9) and Sealing matrix, impeller (9) is welded on Sealing matrix one end, there is multiple annular groove Sealing matrix the other end periphery, and the plurality of annular groove distributes successively along Sealing matrix axial direction, impeller (9) is made up of multiple blade, multiple blade is uniformly distributed along Sealing base circumferential direction, first Sealing (8) is sleeved in rotating shaft (10), and is fixedly connected with rotating shaft (10), and blade face is to inner chamber (15), internal bearing cover (3) is sleeved on the Sealing matrix of the first Sealing (8), and be fixedly mounted on bearing support (2), bearing support (2) is fixed on end cap (1), internal bearing cover (3) two ends respectively arrange a cavity, i.e. left cavity and right cavity, cavity on the right cavity of internal bearing cover (3) and bearing support (2) forms bearing chamber (5), and the left cavity of internal bearing cover (3) and the cavity of the second Sealing (12) end form Seal cage (6), the first seal clearance (7) is formed between multiple annular grooves on internal bearing cover (3) and Sealing matrix, second Sealing (12) is sleeved in rotating shaft (10), and be positioned at the first Sealing (8) left cavity, and vane edge is close to the left cavity wall of the second Sealing (12), the periphery of the second Sealing (12) arranges multiple annular groove, multiple annular groove of the second Sealing and the left cavity inner circumferential of internal bearing cover (3) form the second seal clearance (13), second Sealing (12) is provided with in the axial direction multiple inlet hole (11), multiple inlet hole (11) is along the circumferential direction uniformly distributed, multiple inlet hole (11) is relative with the narrow end of multiple blades of impeller (9), internal bearing cover (3) radially has a regulator hole (14), regulator hole (14) through Seal cage (6) and inner chamber (15), internal bearing cover (3) and end cap (1) are equipped with vent (16), and inner chamber (15) is communicated with bearing chamber (5) by vent (16).
2. the sealing configuration of a kind of oil-lubricated bearing as claimed in claim 1, is characterized in that: the shape that during blade has, narrow-minded outer rim is wide, and to be namely positioned at impeller central end narrow for blade, wide away from impeller central end.
3. the sealing configuration of a kind of oil-lubricated bearing as claimed in claim 1, is characterized in that: described first seal clearance (7) is of a size of 0.1 ~ 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310046832.2A CN103115072B (en) | 2013-01-30 | 2013-01-30 | A kind of sealing configuration of oil-lubricated bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310046832.2A CN103115072B (en) | 2013-01-30 | 2013-01-30 | A kind of sealing configuration of oil-lubricated bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103115072A CN103115072A (en) | 2013-05-22 |
| CN103115072B true CN103115072B (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310046832.2A Expired - Fee Related CN103115072B (en) | 2013-01-30 | 2013-01-30 | A kind of sealing configuration of oil-lubricated bearing |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269712B (en) * | 2017-07-26 | 2023-05-02 | 广西柳航墙材工业有限公司 | Sealing structure of high-efficiency spiral vacuum extrusion molding machine |
| CN108006076A (en) * | 2017-12-29 | 2018-05-08 | 厦门健搏自动化科技有限公司 | The static bearing dustproof and waterproof structure of polishing machine |
| CN112003412B (en) * | 2020-09-01 | 2021-08-20 | 青岛中加特电气股份有限公司 | End cover structure of motor bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008223963A (en) * | 2007-03-15 | 2008-09-25 | Nsk Ltd | Rolling bearing |
| JP2009097665A (en) * | 2007-10-18 | 2009-05-07 | Nsk Ltd | Bearing device |
| WO2009130933A1 (en) * | 2008-04-25 | 2009-10-29 | Nok株式会社 | Sealing device |
| JP2010230058A (en) * | 2009-03-26 | 2010-10-14 | Jtekt Corp | Sealing device and rolling bearing |
| CN101871487A (en) * | 2009-04-27 | 2010-10-27 | 阿母斯替德铁路公司 | Roller bearing |
-
2013
- 2013-01-30 CN CN201310046832.2A patent/CN103115072B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008223963A (en) * | 2007-03-15 | 2008-09-25 | Nsk Ltd | Rolling bearing |
| JP2009097665A (en) * | 2007-10-18 | 2009-05-07 | Nsk Ltd | Bearing device |
| WO2009130933A1 (en) * | 2008-04-25 | 2009-10-29 | Nok株式会社 | Sealing device |
| JP2010230058A (en) * | 2009-03-26 | 2010-10-14 | Jtekt Corp | Sealing device and rolling bearing |
| CN101871487A (en) * | 2009-04-27 | 2010-10-27 | 阿母斯替德铁路公司 | Roller bearing |
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| CN103115072A (en) | 2013-05-22 |
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