CN111089025A - Water pump turbine thrust bearing oil groove cover plate sealing device - Google Patents
Water pump turbine thrust bearing oil groove cover plate sealing device Download PDFInfo
- Publication number
- CN111089025A CN111089025A CN201911299403.XA CN201911299403A CN111089025A CN 111089025 A CN111089025 A CN 111089025A CN 201911299403 A CN201911299403 A CN 201911299403A CN 111089025 A CN111089025 A CN 111089025A
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- CN
- China
- Prior art keywords
- sealing ring
- ring
- sealing
- oil
- air
- 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.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 130
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 239000003595 mist Substances 0.000 claims abstract description 70
- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 14
- 238000011084 recovery Methods 0.000 claims abstract description 7
- 244000126211 Hericium coralloides Species 0.000 claims description 4
- 238000005452 bending Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 87
- 230000000694 effects Effects 0.000 description 3
- 239000010723 turbine oil Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
Images
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention provides a sealing device for an oil groove cover plate of a thrust bearing of a water pump turbine, which relates to the field of thrust bearing equipment of the water pump turbine, this water pump turbine thrust bearing oil groove apron sealing device has the device body, the installation cavity that link up from top to bottom is seted up to the device body, install the first sealing ring that sets up along its circumference on the inner wall of installation cavity, second sealing ring and third sealing ring, first sealing ring, second sealing ring and third sealing ring from top to bottom order interval arrangement, airtight interval has between first sealing ring and the second sealing ring, oil absorption fog interval has between second sealing ring and the third sealing ring, the air feed channel who is used for communicateing airtight interval and air supply has been seted up in the lateral wall of device body, air feed channel is the form of bending, the oil absorption fog passageway that is used for communicateing oil absorption fog interval and oil mist recovery unit has still been seted up in the lateral wall of device body. The sealing device can effectively prevent oil mist from diffusing.
Description
Technical Field
The invention relates to the field of water pump turbine thrust bearing equipment, in particular to a water pump turbine thrust bearing oil groove cover plate sealing device.
Background
The pump turbine generally all contains thrust bearing equipment, for reducing the friction of rotary part and axle bush among the thrust bearing to and reduce the temperature of rotary part and axle bush, generally need lubricate and cool off thrust bearing.
At present, a thrust bearing of a pump turbine adopts turbine oil for lubrication and cooling. The turbine oil absorbs heat generated from the thrust bearing inside the oil sump while being agitated by the main shaft rotating at a high speed, thereby generating a large amount of oil mist. Therefore, a sealing device is required to be arranged between the oil groove cover plate of the pump turbine and the main shaft. Traditional sealing device adopts the felt to seal more, cooperates the oil mist device of inhaling simultaneously and collects the purification to the oil mist in the oil groove. But oil mist can still diffuse into the interior of the hydro-generator from the gap between the sealing device and the main shaft. The diffused oil mist is cooled and condensed into oil drops in the air, and the adverse effect is caused on generator equipment and the factory environment.
In view of the above, the inventor designs a water pump turbine thrust bearing oil groove cover plate sealing device through repeated experiments according to production design experiences in the field and related fields for many years, so as to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a sealing device for an oil groove cover plate of a thrust bearing of a water pump turbine, which can effectively prevent oil mist from diffusing.
In order to achieve the above purpose, the invention provides a sealing device for an oil groove cover plate of a thrust bearing of a pump turbine, which is provided with a device body, wherein the device body is provided with a vertically through installation cavity, the inner wall of the installation cavity is provided with a first sealing ring, a second sealing ring and a third sealing ring which are arranged along the circumferential direction of the installation cavity, the first sealing ring, the second sealing ring and the third sealing ring are sequentially arranged at intervals from top to bottom, an air-tight interval is arranged between the first sealing ring and the second sealing ring, an oil mist absorption interval is arranged between the second sealing ring and the third sealing ring, an air supply channel for communicating the air sealing interval with an air source is arranged in the side wall of the device body, the air supply channel is bent, and an oil mist absorption channel for communicating the oil mist absorption interval with the oil mist recovery device is further arranged in the side wall of the device body.
The sealing device for the oil groove cover plate of the thrust bearing of the pump turbine is characterized in that an air sealing ring groove formed along the circumferential direction of the inner wall of the installation cavity is formed in the inner wall of the installation cavity, and the air sealing ring groove is located between the first sealing ring and the second sealing ring.
The sealing device for the oil groove cover plate of the thrust bearing of the pump turbine is characterized in that the air supply channel is communicated with the air seal through the air seal ring groove.
As above the sealing device of the oil groove cover plate of the thrust bearing of the pump turbine, wherein the gas supply channel comprises a first gas supply section and a second gas supply section which are connected in sequence, the first gas supply section is vertically arranged and is communicated with the gas seal ring groove, and the second gas supply section is horizontally arranged and is communicated with the gas source.
The sealing device for the oil groove cover plate of the thrust bearing of the pump turbine is characterized in that the oil-mist suction channel is a linear pipeline.
The sealing device for the oil groove cover plate of the thrust bearing of the pump turbine is characterized in that the first sealing ring, the second sealing ring and the third sealing ring are all comb tooth sealing rings.
The sealing device for the oil groove cover plate of the thrust bearing of the water pump turbine comprises a device body, wherein the device body comprises an oil absorption mist ring and an air sealing ring, the air sealing ring is overlapped above the oil absorption mist ring and is in sealing connection with the oil absorption mist ring, the first sealing ring is installed on the inner wall of the air sealing ring, and the second sealing ring and the third sealing ring are installed on the inner wall of the oil absorption mist ring.
The sealing device for the oil groove cover plate of the thrust bearing of the pump turbine comprises an oil suction mist ring, an air sealing ring, a bolt and a sealing ring, wherein the oil suction mist ring is fixedly connected with the air sealing ring through the bolt, and the bolt penetrates through the oil suction mist ring and the air sealing ring to fixedly connect the oil suction mist ring with the air sealing ring.
The sealing device for the oil groove cover plate of the thrust bearing of the pump turbine is characterized in that the device body is provided with a plurality of bolts which are uniformly distributed along the circumferential direction of the device body.
Compared with the prior art, the invention has the following characteristics and advantages:
the oil groove cover plate sealing device of the thrust bearing of the water pump turbine fills the gap between the oil groove cover plate and the main shaft by using low-pressure gas, so that oil mist is prevented from leaking out of the gap, and meanwhile, the oil mist is sucked out forcibly, so that the air pressure in the oil groove is balanced, the oil mist is completely controlled in the oil groove, and the oil mist is further prevented from leaking out.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.
FIG. 1 is a cross-sectional view of the device body of the present invention;
FIG. 2 is a sectional view of the device body of the present invention (II).
Description of reference numerals:
100. a sealing device; 10. A device body;
11. an oil mist absorbing ring; 12. A gas seal ring;
13. a bolt; 20. A first seal ring;
30. a second seal ring; 40. A third seal ring;
50. a gas supply channel; 60. An oil mist absorption channel;
70. a gas sealing ring groove; 51. A first gas supply section;
52. and a second gas supply section.
Detailed Description
The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention.
As shown in fig. 1 and fig. 2, the oil groove cover sealing device 100 for a thrust bearing of a pump turbine according to the present invention includes a device body 10 (fig. 1 and fig. 2 only show a partial section of a side wall of the device body), the device body 10 is provided with a vertically through mounting cavity (not shown), a first sealing ring 20 is mounted on an inner wall of the mounting cavity along a circumferential direction thereof, the oil mist recovery device comprises a second sealing ring 30 and a third sealing ring 40, wherein the first sealing ring 20, the second sealing ring 30 and the third sealing ring 40 are sequentially arranged at intervals from top to bottom, the first sealing ring 20 and the second sealing ring are enclosed to form an air-tight interval, the second sealing ring 30 and the third sealing ring 40 are enclosed to form an oil mist absorption interval, an air supply channel 50 used for communicating the air-tight interval with an air source is arranged in the side wall of the device body 10, the air supply channel 50 is bent, and an oil mist absorption channel 60 used for communicating the oil mist absorption interval with an oil mist recovery device is further arranged in the side wall of the device body 10.
The sealing device 100 for the oil groove cover plate of the water pump turbine thrust bearing is sleeved on the main shaft of the thrust bearing and is fixedly connected with the oil groove cover plate. Specifically, the main shaft penetrates through the installation cavity, the first sealing ring 20, the second sealing ring 30 and the third sealing ring 40 which are located on the inner wall of the installation cavity are respectively in sealing fit with the outer wall of the main shaft, the bottom surface of the device body 10 is in sealing connection with the oil groove cover plate, the inner wall surface of the first sealing ring 20, the inner wall surface of the second sealing ring 30, the inner wall surface of the third sealing ring 40, the inner wall surface of the device body 10 and the outer wall surface of the main shaft are enclosed to form an air-tight sealing cavity, and the oil mist suction. The air supply conveys low-pressure gas into the air-tight sealing cavity through the gas supply channel 50, positive pressure is generated in the air-tight sealing cavity, the oil mist is isolated in the first sealing ring, and the oil mist recovery device sucks the oil mist in the oil mist absorption cavity through the oil mist absorption channel 60 to prevent the oil mist from leaking.
The oil groove cover plate sealing device 100 for the thrust bearing of the pump turbine fills the gap between the oil groove cover plate and the main shaft by using the low-pressure gas in the gas seal cavity, so that the oil mist is prevented from leaking out of the gap, and meanwhile, the oil mist in the oil suction mist cavity is sucked out forcibly, so that the air pressure in the oil groove is balanced, the oil mist is completely controlled in the oil groove, and the oil mist is further prevented from leaking out.
The sealing device 100 for the oil groove cover plate of the thrust bearing of the water pump turbine, provided by the invention, has the advantages of simple structure and wide application range.
In an alternative example of the present invention, the inner wall of the device body 10 further has a gas sealing ring groove 70 formed along the circumferential direction of the mounting cavity, and the gas sealing ring groove 70 is located between the first sealing ring 20 and the second sealing ring 30 (i.e. the gas sealing ring groove 70 is located at the gas sealing interval). Thus, after the device body 10 is sleeved on the main shaft, the air sealing ring groove 70 becomes a part of the air sealing cavity, the volume of the air sealing cavity is enlarged, and the sealing effect of the air sealing cavity is further ensured.
In an alternative embodiment, the gas supply passage 50 communicates with the gas seal space through a gas seal ring groove 70.
In an alternative example of the present invention, the air supply passage 50 includes a first air supply section 51 and a second air supply section 52 connected in series, the first air supply section 51 is vertically disposed and communicated with the airtight ring groove 70, and the second air supply section 52 is horizontally disposed and communicated with the air supply. The first air supply section 51 and the second air supply section 52 are vertically arranged, so that the whole air supply channel 50 is bent, the air in the air sealing cavity can be effectively prevented from leaking out through the air supply channel 50, and the sealing performance of the air sealing cavity is ensured. Of course, other angles may be selected for the bending angle of the air supply channel 50.
In an alternative embodiment of the present invention, the oil mist suction passage 60 is a straight pipe to facilitate the discharge of the oil mist to the oil mist recovery device in time.
In an alternative embodiment of the present invention, the first seal ring 20, the second seal ring 30 and the third seal ring 40 are all comb-tooth seal rings to increase the sealing effect. The structure of the comb tooth sealing ring can adopt the prior art and is not described in detail herein.
In an alternative example of the present invention, the device body 10 includes an oil mist absorbing ring 11 and an air seal ring 12, which are respectively cylindrical, the air seal ring 12 is disposed above the oil mist absorbing ring 11 and is hermetically connected to the oil mist absorbing ring 11, the first seal ring 20 is mounted on an inner wall of the air seal ring 12, and the second seal ring 30 and the third seal ring 40 are mounted on an inner wall of the oil mist absorbing ring 11.
In an alternative example of the present invention, the oil mist absorbing ring 11 and the air seal ring 12 are fixedly connected by a bolt 13, and the bolt 13 penetrates through a side wall of the oil mist absorbing ring 11 and a side wall of the air seal ring 12 to fixedly connect the oil mist absorbing ring 11 and the air seal ring 12 together.
In an alternative example, bolt holes for mounting bolts 13 are respectively formed in the side wall of the oil mist absorbing ring 11 and the side wall of the air sealing ring 12, and the bolts 13 penetrate through the bolt holes. Of course, the bolt holes are arranged in a staggered mode with the air supply channel 50 and the oil mist suction channel 60.
Further, the bolt 13 penetrates through the side wall of the oil mist absorption ring 11, the side wall of the air seal ring 12 and the oil groove cover plate, and fixes the oil mist absorption ring 11 and the air seal ring 12 on the oil groove cover plate.
In an alternative example, the apparatus body 10 has a plurality of bolts 13, and the plurality of bolts 13 are evenly distributed along the circumference of the apparatus body 10.
In an alternative example of the present invention, the device body 10 has a plurality of segments, which surround the device body 10 in the circumferential direction of the installation cavity.
The present invention is not limited to the above embodiments, and in particular, various features described in different embodiments can be arbitrarily combined with each other to form other embodiments, and the features are understood to be applicable to any embodiment except the explicitly opposite descriptions, and are not limited to the described embodiments.
Claims (9)
1. A sealing device for an oil groove cover plate of a thrust bearing of a water pump turbine is provided with a device body and is characterized in that, the device body is provided with a vertically through installation cavity, the inner wall of the installation cavity is provided with a first sealing ring, a second sealing ring and a third sealing ring which are arranged along the circumferential direction of the installation cavity, the first sealing ring, the second sealing ring and the third sealing ring are sequentially arranged at intervals from top to bottom, an air-tight interval is arranged between the first sealing ring and the second sealing ring, an oil mist absorption interval is arranged between the second sealing ring and the third sealing ring, an air supply channel for communicating the air sealing interval with an air source is arranged in the side wall of the device body, the air supply channel is bent, and an oil mist absorption channel for communicating the oil mist absorption interval with the oil mist recovery device is further arranged in the side wall of the device body.
2. The apparatus as claimed in claim 1, wherein the inner wall of the installation cavity has a gas sealing ring groove formed along a circumferential direction thereof, and the gas sealing ring groove is located between the first sealing ring and the second sealing ring.
3. The apparatus as claimed in claim 2, wherein the gas supply channel is connected to the gas-tight space through the gas-tight ring groove.
4. The apparatus as claimed in claim 3, wherein the gas supply channel comprises a first gas supply section and a second gas supply section which are connected in sequence, the first gas supply section is vertically arranged and communicated with the gas seal ring groove, and the second gas supply section is horizontally arranged and communicated with the gas source.
5. The apparatus as claimed in claim 1, wherein the oil suction mist channel is a straight line pipe.
6. The pump turbine thrust bearing oil groove cover plate sealing device as claimed in claim 1, wherein the first sealing ring, the second sealing ring and the third sealing ring are all comb-tooth sealing rings.
7. The apparatus of claim 1, wherein the apparatus body comprises an oil mist suction ring and an air seal ring, the air seal ring is stacked above the oil mist suction ring and is in sealing connection with the oil mist suction ring, the first seal ring is mounted on an inner wall of the air seal ring, and the second seal ring and the third seal ring are mounted on an inner wall of the oil mist suction ring.
8. The water pump turbine thrust bearing oil groove cover plate sealing device of claim 7, wherein the oil suction mist ring and the air seal ring are fixedly connected through bolts, and the bolts penetrate through the oil suction mist ring and the air seal ring to fixedly connect the oil suction mist ring and the air seal ring together.
9. The apparatus of claim 8, wherein the apparatus body has a plurality of bolts, and the plurality of bolts are uniformly distributed along a circumferential direction of the apparatus body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911299403.XA CN111089025A (en) | 2019-12-17 | 2019-12-17 | Water pump turbine thrust bearing oil groove cover plate sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911299403.XA CN111089025A (en) | 2019-12-17 | 2019-12-17 | Water pump turbine thrust bearing oil groove cover plate sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111089025A true CN111089025A (en) | 2020-05-01 |
Family
ID=70395617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911299403.XA Pending CN111089025A (en) | 2019-12-17 | 2019-12-17 | Water pump turbine thrust bearing oil groove cover plate sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111089025A (en) |
-
2019
- 2019-12-17 CN CN201911299403.XA patent/CN111089025A/en active Pending
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