CN116123285A - Rotary bearing oil seal structure - Google Patents

Rotary bearing oil seal structure Download PDF

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Publication number
CN116123285A
CN116123285A CN202310005269.8A CN202310005269A CN116123285A CN 116123285 A CN116123285 A CN 116123285A CN 202310005269 A CN202310005269 A CN 202310005269A CN 116123285 A CN116123285 A CN 116123285A
Authority
CN
China
Prior art keywords
oil
thrust
groove
ring
annular groove
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
Application number
CN202310005269.8A
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Chinese (zh)
Inventor
朱忠英
刘健俊
戴志威
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongfang Electric Machinery Co Ltd DEC
Original Assignee
Dongfang Electric Machinery Co Ltd DEC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dongfang Electric Machinery Co Ltd DEC filed Critical Dongfang Electric Machinery Co Ltd DEC
Priority to CN202310005269.8A priority Critical patent/CN116123285A/en
Publication of CN116123285A publication Critical patent/CN116123285A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/06—Bearing arrangements
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/761—Sealings of ball or roller bearings specifically for bearings with purely axial load
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

The invention discloses a rotary bearing oil sealing structure, which relates to the technical field of hydroelectric power generation equipment and comprises a thrust head, a mirror plate, a thrust tile, a thrust bearing seat and an oil groove, wherein the thrust head is arranged on a rotating shaft, the mirror plate is arranged at the lower end of the thrust head, the oil groove is sleeved at the lower end of the thrust head, the thrust bearing seat and lubricating oil are arranged in the oil groove, the thrust tile is arranged above the thrust bearing seat, an oil film is formed between the mirror plate and the thrust tile, the outer side of the thrust head is provided with an annular groove which is communicated with the oil groove, an oil blocking ring is arranged above the oil groove, and the lower end of the oil blocking ring is inserted into the annular groove filled with the lubricating oil. When the unit operates, the thrust head rotates under the action of the rotating shaft, the mirror plate rotates along with thrust to drive lubricating oil to rotate to strike the oil groove and generate oil mist, the lower end of the oil blocking ring is inserted into the annular groove filled with lubricating oil, and the generated oil mist is blocked in the outer cavity by the oil blocking ring and the lubricating oil, so that the oil mist is prevented from overflowing.

Description

Rotary bearing oil seal structure
Technical Field
The invention relates to the technical field of hydroelectric power generation equipment, in particular to a rotating bearing oil sealing structure.
Background
Conventional hydro-generator bearing lubrication generally adopts a soaking type operation mode, namely, when a unit is operated, bearing shoes are soaked in lubricating oil all the time, however, the bearing is severely stirred to the lubricating oil of an oil groove during operation, and oil mist of the oil groove is easily generated. The oil mist is generated and overflowed, so that the whole generator set is polluted. Dust generated in the operation of the oil mist mixing unit is adhered to the surfaces of electrical structural components of the unit, so that insulation failure is easy to cause, and electrical accidents are caused.
At present, a unit oil groove of a lubricating bearing also adopts some oil sealing structures, such as a contact type oil baffle; however, the sealing of the lubricating bearing belongs to the sealing between the dynamic component and the static component, and the contact component and the rotating component cannot be in contact in a hundred percent fit due to a certain swinging degree of the rotating component, so that the sealing effect is not ideal. In addition, the sealing effect is worse as the contact parts wear.
The Chinese patent with publication number of CN111765247A and publication date of 2020.10.13 discloses a combined bearing for a hydroelectric generating set, which comprises a thrust bearing and an oil groove, wherein an oil groove cover is arranged above the oil groove, the oil groove cover comprises an annular plate and a vertical sleeve, the annular plate is fixedly arranged on the top wall surface of the oil groove, and the vertical sleeve is positioned below the annular plate and fixedly connected with the inner ring side of the annular plate; the thrust bearing comprises a thrust head, the thrust head is arranged in the vertical sleeve in a penetrating way, and a sealing cover is arranged between the top of the thrust head and the oil groove cover; the thrust head is equipped with oil mist conveying mechanism on being located the inside lateral wall of sealed lid to be equipped with oil mist clearance mechanism on the oil groove and cover, oil mist conveying mechanism flows the oil mist that the thrust head was rotatory to clearance mechanism in through wind-force, and oil mist clearance mechanism is collected in turn to the oil mist, discharges the lubricating oil after collecting into the oil groove again.
The device is provided with the fan blades in the oil groove, so that the pressure in the oil groove is increased, a negative pressure area is formed between the bearing and the generator rotor hub and is positioned above the oil groove cover, and high-pressure gas containing oil mist in the oil groove brings the oil mist from the position between the thrust bearing and the sealing cover to the wind path of the generator, so that a unit is polluted, and meanwhile, the waste of lubricating oil is increased; the oil mist is not prevented from overflowing.
Disclosure of Invention
The invention aims to solve the problem that oil mist can not be prevented from overflowing, and provides a rotary bearing oil sealing structure.
The invention aims at realizing the following technical scheme:
the utility model provides a swivel bearing oil seal structure, includes thrust collar, mirror plate, thrust tile, thrust bearing frame and oil groove, the thrust collar sets up in the pivot, the mirror plate sets up at the thrust collar lower extreme, the oil groove cover is established at the thrust collar lower extreme, be provided with thrust bearing frame and lubricating oil in the oil groove, thrust bearing frame top is provided with the thrust tile, form the oil film between mirror plate and the thrust tile, the thrust collar outside is provided with annular groove, annular groove is linked together with the oil groove, the oil groove top is provided with and hinders the oil ring, it inserts in the annular groove that is filled with lubricating oil to hinder the oil ring lower extreme.
Preferably, a plurality of communication ports are arranged on the outer side of the annular groove.
Preferably, a labyrinth ring is arranged above the annular groove.
Preferably, the lower end of the oil resistance ring is provided with an oil-free coating.
Preferably, the lower end of the oil resistance ring is in an inverted cone shape.
Preferably, a sealing cover is arranged between the inner side of the oil resistance ring and the thrust collar.
Preferably, a clearance labyrinth for sealing is arranged between the sealing cover and the thrust head.
Preferably, the oil groove and the top of the sealing cover are provided with oil mist sucking and discharging pipes.
Preferably, the side wall of the oil groove is provided with a side cover.
Preferably, a sealing ring is arranged between the side cover and the side wall of the oil groove.
The beneficial effects of this technical scheme are as follows:
1. according to the rotary bearing oil sealing structure provided by the invention, when the unit operates, the thrust head rotates under the action of the rotating shaft, the mirror plate rotates along with thrust to drive lubricating oil to rotate to strike the oil groove and generate oil mist, the lower end of the oil blocking ring is inserted into the annular groove filled with lubricating oil, and the generated oil mist is blocked in the outer cavity by the oil blocking ring and the lubricating oil, so that the effect of preventing the oil mist from overflowing is achieved.
2. According to the rotary bearing oil sealing structure provided by the invention, stirring is also arranged in the annular groove of the oil resistance ring, and the labyrinth ring is arranged at the upper part of the annular groove, so that the lubricating oil in the annular groove is further prevented from overflowing.
3. According to the rotary bearing oil sealing structure provided by the invention, the oil-free coating is coated on the surface of the lower end of the oil-resistant ring, so that the stirring of the oil-resistant ring to lubricating oil is reduced.
4. The lower end of the oil resistance ring is in an inverted cone shape, so that lubricating oil is prevented from escaping upwards.
5. According to the rotary bearing oil sealing structure provided by the invention, the sealing cover and the clearance labyrinth are arranged to further strengthen the effect of preventing oil mist from overflowing.
6. According to the rotary bearing oil sealing structure provided by the invention, a small amount of overflowed oil mist is discharged by the oil mist suction pipe and the oil mist suction device.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a schematic view of the structure of the oil-resistant ring according to the present invention;
wherein: 1. a rotating shaft; 2. a thrust head; 3. a mirror plate; 4. a thrust shoe; 5. thrust bearing seat; 6. an oil groove; 7. lubricating oil; 8. oil-blocking ring; 8.1, a connecting part; 8.2, a downward extension; 9. a mist absorbing and discharging pipe; 10. sealing cover; 11. an annular groove; 12. a communication port; 13. an oil storage cavity under the annular groove; 14. a labyrinth ring; 15. a non-oil-stick coating; 16. a side cover; 17. a seal ring; 18. the gap labyrinth.
Detailed Description
The present invention will be described in further detail with reference to examples, but embodiments of the present invention are not limited thereto.
It is noted that when an element is referred to as being "mounted," "secured," or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that, in the embodiments of the present invention, terms such as left, right, up, and down are merely relative concepts or references to normal use states of the product, and should not be construed as limiting.
Example 1
As shown in fig. 1-3, a rotary bearing oil seal structure comprises a thrust head 2, a mirror plate 3, a thrust bearing block 4, a thrust bearing block 5 and an oil groove 6, wherein the thrust head 2 is arranged on a rotating shaft 1 through a key or a bolt, the mirror plate 3 is arranged at the lower end of the thrust head 2, the oil groove 6 is sleeved at the lower end of the thrust head 2, a thrust bearing block 5 and lubricating oil 7 are arranged in the oil groove 6, the thrust bearing block 5 is fixedly arranged at the lower end of the inner wall of the oil groove 6, the thrust bearing block 4 is arranged above the thrust bearing block 5, an oil film is formed between the mirror plate 3 and the thrust bearing block 4, an annular groove 11 is arranged outside the thrust head 2, the annular groove 11 is communicated with the oil groove 6, the annular groove 11 is consistent with the liquid level of the lubricating oil 7 in the oil groove 6, an oil blocking ring 8 is arranged above the oil groove 6, the oil blocking ring 8 comprises a connecting part 8.1 and a lower extending part 8.2, the connecting part 8.1 is fixedly connected with the upper part of the oil groove 6, the lower end of the lower part 8.1 is inserted into the annular groove 11, and the annular groove 11 is lower than the annular groove 11 is inserted into the annular groove 11. When the unit operates, the thrust head 2 rotates under the action of the rotating shaft 1, the mirror plate 3 rotates along with thrust to drive the lubricating oil 7 to rotate to strike the oil groove 6 and generate oil mist, the lower end of the oil blocking ring 8 is inserted into the annular groove 11 filled with the lubricating oil 7, and the generated oil mist is blocked in the outer cavity by the oil blocking ring 8 and the lubricating oil 7, so that the oil mist overflow prevention effect is achieved.
Example 2
The difference between this embodiment and embodiment 1 is that: the outside of the annular groove 11 is provided with a plurality of communication ports 12, and the plurality of communication ports 12 enable the annular groove lower oil storage cavity 13 at the lower end of the annular groove 11 to be more rapidly consistent with the liquid level of the lubricating oil 7 in the oil groove 6.
Wherein, be provided with labyrinth ring 14 above the annular slot 11, the oil-blocking ring 8 also exists in annular slot 11 and stirs, and the upper portion of annular slot 11 is provided with labyrinth ring 14, further avoids annular slot 11 in lubricating oil 7 excessive.
Wherein, the lower extreme of oil resistance ring 8 is provided with and is not stained with oily coating 15, reduces the stirring of oil resistance ring 8 to lubricating oil 7.
Wherein, the lower end of the oil resistance ring 8 is in an inverted cone shape, so that the lubricating oil 7 is prevented from escaping upwards.
Wherein a sealing cover 10 is arranged between the inner side of the oil resistance ring 8 and the thrust collar 2.
Wherein, a gap labyrinth 18 for sealing is arranged between the sealing cover 10 and the thrust head 2, which further enhances the effect of preventing oil mist from overflowing.
Wherein, oil groove 6 and sealed lid 10 top are provided with and inhale and arrange oil mist pipe 9, inhale and arrange oil mist pipe 9 and inhale oily fog discharging device and link to each other, can spill over a small amount to sealed lid 10 department and oil mist discharge of oil groove 6 upper end.
Wherein the side wall of the oil groove 6 is provided with a side cover 16.
Wherein, a sealing ring 17 is arranged between the side cover 16 and the side wall of the oil groove 6. The side cover 16 is used for overhauling and maintaining the thrust bearing bush without dismantling other parts.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present invention fall within the scope of the present invention.

Claims (10)

1. The utility model provides a swivel bearing oil seal structure, includes thrust collar (2), mirror plate (3), thrust tile (4), thrust bearing seat (5) and oil groove (6), thrust collar (2) set up on pivot (1), mirror plate (3) set up in thrust collar (2) lower extreme, oil groove (6) cover is established in thrust collar (2) lower extreme, be provided with thrust bearing seat (5) and lubricating oil (7) in oil groove (6), thrust bearing seat (5) top is provided with thrust tile (4), form the oil film between mirror plate (3) and thrust tile (4), thrust collar (2) outside is provided with annular groove (11), annular groove (11) are linked together with oil groove (6), oil groove (6) top is provided with and hinders oil ring (8), it inserts in annular groove (11) that are filled with lubricating oil (7) to hinder oil ring (8) lower extreme.
2. A swivel bearing oil seal arrangement according to claim 1, characterized in that: a plurality of communication ports (12) are formed in the outer side of the annular groove (11).
3. A swivel bearing oil seal arrangement according to claim 2, characterized in that: a labyrinth ring (14) is arranged above the annular groove (11).
4. A swivel bearing oil seal according to claim 3, characterized in that: the lower end of the oil resistance ring (8) is provided with an oil-free coating (15).
5. The rotary bearing oil seal according to claim 4, wherein: the lower end of the oil resistance ring (8) is in an inverted cone shape.
6. A rotary bearing oil seal according to claim 1 or 5, characterized in that: a sealing cover (10) is arranged between the inner side of the oil resistance ring (8) and the thrust collar (2).
7. The rotary bearing oil seal according to claim 6, wherein: a clearance labyrinth (18) for sealing is arranged between the sealing cover (10) and the thrust head (2).
8. The rotary bearing oil seal according to claim 7, wherein: the oil groove (6) and the top of the sealing cover (10) are provided with an oil mist sucking and discharging pipe (9).
9. A rotary bearing oil seal according to claim 8, wherein: the side wall of the oil groove (6) is provided with a side cover (16).
10. A swivel bearing oil seal arrangement according to claim 9, characterized in that: a sealing ring (17) is arranged between the side cover (16) and the side wall of the oil groove (6).
CN202310005269.8A 2023-01-04 2023-01-04 Rotary bearing oil seal structure Pending CN116123285A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310005269.8A CN116123285A (en) 2023-01-04 2023-01-04 Rotary bearing oil seal structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310005269.8A CN116123285A (en) 2023-01-04 2023-01-04 Rotary bearing oil seal structure

Publications (1)

Publication Number Publication Date
CN116123285A true CN116123285A (en) 2023-05-16

Family

ID=86296789

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310005269.8A Pending CN116123285A (en) 2023-01-04 2023-01-04 Rotary bearing oil seal structure

Country Status (1)

Country Link
CN (1) CN116123285A (en)

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