CN103115072A - Seal structure of oil-lubricated bearing - Google Patents
Seal structure of oil-lubricated bearing Download PDFInfo
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- CN103115072A CN103115072A CN2013100468322A CN201310046832A CN103115072A CN 103115072 A CN103115072 A CN 103115072A CN 2013100468322 A CN2013100468322 A CN 2013100468322A CN 201310046832 A CN201310046832 A CN 201310046832A CN 103115072 A CN103115072 A CN 103115072A
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Abstract
The invention relates to the technical filed of sealing, and specifically relates to a seal structure of an oil-lubricated bearing, which solves the sealing problem of the high-speed oil-lubricated bearing. The seal structure comprises an internal bearing cover (3) and a first sealing element (8), wherein the first sealing element (8) comprises an impeller (9) and a sealing element base body, and is sleeved on a rotating shaft (10), the internal bearing cover (3) is sleeved on the sealing element base body of the first sealing element (8), the internal bearing cover (3) is provided with a left cavity and a right cavity, the right cavity of the internal bearing cover (3) and a cavity on a bearing blocking (2) form a bearing chamber (5), the left cavity of the internal bearing cover (3) and a cavity on the end of a second sealing element (12) form a seal cavity (6), and a sealing clearance (7) is formed between the internal bearing cover (3) and a plurality of circular grooves in the sealing element body, a plurality of circular grooves of the second sealing element and the internal circumference of the left cavity of the internal bearing cover (3) form a sealing clearance (13).
Description
Technical field:
The present invention relates to technical field of sealing technology, for the sealing configuration of oil-lubricated bearing, be applicable to the multiple applications such as high-speed electric expreess locomotive especially.
Background technique:
Bearing generally adopts grease lubrication and two kinds of lubricating systems of oil lubrication, and with respect to grease lubrication, the oil lubrication mode has better lubrication effect.The encapsulating method that oil-lubricated bearing is commonly used has: contact seal, labyrinth seal.Wherein contact seal is owing to existing friction, and in the working life of having reduced Sealing, when large or rotating speed was higher when vibration, sealing effect reduced greatly, and its application is limited by the highest running speed.Labyrinth seal belongs to the non-contact sealing means, the concrete structure kind is a lot, and simple labyrinth seal structure seal leakage amount is larger, and the complex maze structure has better sealing effect, but can greatly 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, solved under the high speed operation condition oil leak amount large, easily enter the deficiency that inner chamber pollutes electric component, improved the reliability of oil-lubricated bearing when high speed operation.
Technological scheme of the present invention is that a kind of sealing configuration of oil-lubricated bearing comprises internal bearing cover and the first Sealing; Described the first Sealing comprises impeller and Sealing matrix, and impeller welding is at Sealing matrix one end, and Sealing matrix the other end periphery has a plurality of annular grooves, and these a plurality of annular grooves distribute successively along Sealing matrix axial direction; Impeller is made of a plurality of blades, and a plurality of blades evenly distribute along Sealing matrix circumferencial direction, and the first sealing member sheathing and is fixedly connected with rotating shaft in 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, the internal bearing cover two ends respectively arrange a cavity, be left cavity and right cavity, the right cavity of internal bearing cover and the cavity on bearing support consist of bearing chamber, and the left cavity of internal bearing cover and the cavity of the second seal ends consist of Seal cage; Consist of seal clearance between a plurality of annular grooves on internal bearing cover and Sealing matrix, the second sealing member sheathing is in rotating shaft, and be positioned at the first left cavity of Sealing, and the left cavity wall of impeller edge next-door neighbour's the second Sealing, the periphery of the second Sealing arranges a plurality of annular grooves, in a plurality of annular grooves of the second Sealing and the left cavity of internal bearing cover, week consists of seal clearance, be provided with a plurality of inlet holes along axial direction on the second Sealing, a plurality of inlet holes along the circumferential direction evenly distribute, and a plurality of inlet holes are relative with the narrow end of a plurality of blades of impeller; Internal bearing cover radially has a regulator hole, and regulator hole connects Seal cage and inner chamber; Be equipped with vent on internal bearing cover and end cap, vent is communicated with inner chamber with bearing chamber.
The wide shape of narrow-minded outer rim during blade has, it is narrow that namely blade is positioned at the impeller center-side, wide away from the impeller center-side.
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 the gas pressure sealing means, and leakage rate is little, and sealing effect is good; 2) the invention belongs to the non-contact seal form, without wearing and tearing, long service life, reliability is high; 3) the present invention is not subjected to the impact of rotating speed height, is specially adapted to the high-speed bearing sealing applications; 4) the present invention is simple in structure, is easy to processing and installs, and application prospect is extensive.
Description of drawings:
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, Figure 1 shows that the part of symplex structure of the present invention, and the present invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the sealing configuration of a kind of oil-lubricated bearing of the present invention comprises internal bearing cover 3, the first Sealing 8, the second Sealing 12.
The first Sealing 8 comprises impeller 9 and Sealing matrix, and impeller 9 is welded on Sealing matrix one end, and Sealing matrix the other end periphery has a plurality of annular grooves, and a plurality of annular grooves distribute successively along Sealing matrix axial direction.Impeller 9 is made of a plurality of blades, and a plurality of blades evenly distribute along Sealing matrix circumferencial direction.The wide shape of narrow-minded outer rim during blade has, it is narrow that namely blade is positioned at the impeller center-side, wide away from the impeller center-side, is preferably trapezoidal.
The 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, be left cavity and right cavity, left cavity and right cavity are respectively used to consist of Seal cage 6 and bearing chamber 5, and namely the right cavity of internal bearing cover 3 and the cavity on bearing support 2 consist of bearing chamber 5, bearing chamber 5 is connected with bearing face, is mainly used in storing lubricant oil; The cavity of the left cavity of internal bearing cover 3 and the second Sealing 12 ends consists of Seal cage 6.Consist of seal clearance 7 between a plurality of 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 sizes are selected according to the bearing bore diameter size, and more excellent span is 0.1～0.5mm.
The second Sealing 12 is sleeved in rotating shaft 10, and is positioned at the first left cavity of Sealing 8, and the left cavity wall of impeller edge next-door neighbour's the second Sealing 12.The periphery of the second Sealing 12 arranges a plurality of annular grooves, and in these a plurality of annular grooves and the left cavity of internal bearing cover 3, week consists of seal clearance 13, thereby makes labyrinth seal clearance 13 with inner chamber 15 and Seal cage 6 isolation, can reduce Leakage Gas, plays the auxiliary seal effect.Be provided with a plurality of inlet holes 11 along axial direction on the second Sealing 12, a plurality of inlet holes 11 along the circumferential direction evenly distribute, a plurality of inlet holes 11 are relative with the narrow end of a plurality of blades of impeller 9, are convenient to inner chamber 15 gases and enter Seal cage 6 by inlet hole 11, and impeller 9 is for generation of blast.
Internal bearing cover 3 radially has a regulator hole 14, regulator hole 14 connects Seal cage 6 and inner chamber 15, Main Function is to make 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 sizes, can realize the adjusting to Seal cage 6 internal pressures, thereby obtain to have the pressure difference of optimal seal effect.
As shown in Figure 3, be equipped with vent 16 on internal bearing cover 3 and end cap 1, vent 16 is communicated with inner chamber 15 with bearing chamber 5, thus the sealing air-flow circulation loop of formation and 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 rotation and is produced blast, and blast by inlet hole 11 suction seal chambeies 6, causes Seal cage 6 internal pressures higher than bearing chamber 5 air in inner chamber 15, mineralization pressure is poor, thereby produces air stream in the gap between Seal cage 6 and bearing chamber 5.Utilize the air stream in the gap can stop the lubricant oil in bearing chamber 5 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 playing good sealing effect in inner chamber 15.
Claims (3)
1. the sealing configuration of an oil-lubricated bearing, it is characterized in that: the sealing structure comprises internal bearing cover (3) and the first Sealing (8), described the first Sealing (8) comprises impeller (9) and Sealing matrix, and impeller (9) is welded on Sealing matrix one end, and Sealing matrix the other end periphery has a plurality of annular grooves, and these a plurality of annular grooves distribute successively along Sealing matrix axial direction, impeller (9) is made of a plurality of blades, and a plurality of blades evenly distribute along Sealing matrix circumferencial direction, and the 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, be left cavity and right cavity, cavity on the right cavity of internal bearing cover (3) and bearing support (2) consists of bearing chamber (5), the cavity formation Seal cage (6) of the left cavity of internal bearing cover (3) and the second Sealing (12) end, consist of seal clearance (7) between a plurality of annular grooves on internal bearing cover (3) and Sealing matrix, the second Sealing (12) is sleeved in rotating shaft (10), and be positioned at the left cavity of the first Sealing (8), and the left cavity wall of impeller edge next-door neighbour's the second Sealing (12), the periphery of the second Sealing (12) arranges a plurality of annular grooves, in a plurality of annular grooves of the second Sealing and the left cavity of internal bearing cover (3), week consists of seal clearance (13), the second Sealing (12) is upper is provided with a plurality of inlet holes (11) along axial direction, a plurality of inlet holes (11) along the circumferential direction evenly distribute, a plurality of inlet holes (11) are relative with the narrow end of a plurality of blades of impeller (9), internal bearing cover (3) radially has a regulator hole (14), and regulator hole (14) connects Seal cage (6) and inner chamber (15), be equipped with vent (16) on internal bearing cover (3) and end cap (1), vent (16) is communicated with inner chamber (15) with bearing chamber (5).
2. a kind of sealing configuration of oil-lubricated bearing as claimed in claim 1, it is characterized in that: the wide shape of narrow-minded outer rim during blade has, it is narrow that namely blade is positioned at the impeller center-side, wide away from the impeller center-side.
3. a kind of sealing configuration of oil-lubricated bearing as claimed in claim 1, it is characterized in that: described 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 true CN103115072A (en) | 2013-05-22 |
| CN103115072B 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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| CN (1) | CN103115072B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269712A (en) * | 2017-07-26 | 2017-10-20 | 广西柳航墙材工业有限公司 | A kind of sealing structure of high-efficiency helical vacuum extruding form 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 |
| CN112003412A (en) * | 2020-09-01 | 2020-11-27 | 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269712A (en) * | 2017-07-26 | 2017-10-20 | 广西柳航墙材工业有限公司 | A kind of sealing structure of high-efficiency helical vacuum extruding form 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 |
| CN112003412A (en) * | 2020-09-01 | 2020-11-27 | 青岛中加特电气股份有限公司 | End cover structure of motor bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103115072B (en) | 2016-02-24 |
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