CN107477185B - Oil lubrication thrust bearing mechanical sealing system and coolant pump - Google Patents
Oil lubrication thrust bearing mechanical sealing system and coolant pump Download PDFInfo
- Publication number
- CN107477185B CN107477185B CN201710800264.9A CN201710800264A CN107477185B CN 107477185 B CN107477185 B CN 107477185B CN 201710800264 A CN201710800264 A CN 201710800264A CN 107477185 B CN107477185 B CN 107477185B
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- ring
- static
- rotating
- circumferential surface
- movable
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- 238000007789 sealing Methods 0.000 title claims abstract description 27
- 239000002826 coolant Substances 0.000 title claims description 10
- 238000005461 lubrication Methods 0.000 title abstract description 16
- 230000003068 static effect Effects 0.000 claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 239000007770 graphite material Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 8
- 239000010687 lubricating oil Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000004807 localization Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
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- 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
- F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
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- 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
- F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
- F16J15/28—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of metal
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- 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
- F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
- F16J15/30—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of carbon
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a mechanical sealing system of an oil lubrication thrust bearing, which comprises a moving ring and a static ring component, wherein: the inner circumferential surface of the rotating ring is matched with the outer circumferential surface of the static ring component and is in rotating connection with the outer circumferential surface of the static ring component, and a plurality of hydrodynamic grooves are formed in the inner circumferential surface of the rotating ring; or a plurality of hydrodynamic grooves are arranged on the outer circumferential surface of the static ring component; a plurality of dynamic pressure grooves with different depths are arranged in the hydrodynamic pressure groove, so that the interior of the hydrodynamic pressure groove is in a step shape. The mechanical sealing system is characterized in that a plurality of hydrodynamic grooves are uniformly formed in the outer circumferential surface of the static ring component or the inner circumferential surface of the movable ring, and a multi-stage hydrodynamic effect is formed between the movable ring and the static ring component in the bearing operation process. The stable oil film is formed, the friction and the abrasion of the contact surface are avoided, and meanwhile, the controllable leakage amount of the lubricating oil can be ensured, so that the long-time reliable and stable operation of the oil mechanical seal is ensured.
Description
Technical Field
The invention relates to a mechanical seal of a bearing, in particular to a mechanical seal of an oil lubrication thrust bearing of a vane pump.
Background
With the rapid development of economic construction and the adjustment of energy policies in China, the state institute of 3 months in 2006 passes through the 'long-term development planning in national nuclear power', the total installed capacity of nuclear power reaches 7000 ten thousand kilowatts in 2020, and 2-3 million kilowatt nuclear power units are put into production each year on average. The national development plan of 'eleven and five' proposes to actively develop nuclear power construction, focus on developing a million kilowatt-level nuclear power station and propose to realize autonomous innovation and localization of nuclear power equipment.
At present, the market of the shaft seal type nuclear main pump in China still depends on import, no enterprise capable of completely and autonomously producing the nuclear main pump is provided domestically, the reliability and the service life of relevant parts of the main pump determine the safety and the operation economy of a power station, an oil lubrication thrust bearing mechanical sealing system needs to bear the leakage of lubricating oil of the oil lubrication thrust bearing to the atmosphere, meanwhile, the lubricating oil temperature exchange is completed with an external oil tank by a certain leakage amount, and the application of the conventional mechanical seal cannot be reliably met due to structural limitation in the aspects of high pressure and reliable leakage. The invention can realize the localization of the oil lubrication thrust bearing mechanical sealing system to replace import, promotes the development of the nuclear power industry in China, and has great significance for realizing the development strategy of the nuclear power manufacturing localization and leading the nuclear power manufacturing to become the prop industry of national economy.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an oil lubrication thrust bearing mechanical sealing system. Another object of the invention is to propose a coolant pump fitted with said mechanical sealing system.
The invention relates to an oil lubrication thrust bearing mechanical sealing system, which comprises a dynamic ring 5 and a static ring component 3, wherein:
the inner circumferential surface of the movable ring 5 is matched and rotationally connected with the outer circumferential surface of the static ring component 3, and a plurality of hydrodynamic grooves are arranged on the inner circumferential surface of the movable ring 5; or a plurality of hydrodynamic grooves are arranged on the outer circumferential surface of the static ring component 3;
a plurality of dynamic pressure grooves with different depths are arranged in the hydrodynamic pressure groove, so that the interior of the hydrodynamic pressure groove is in a step shape.
Further, the device comprises a static part of the device, a rotating device 10 and a plurality of elastic parts, wherein:
the static ring assembly 3 is fixedly connected with a static part of equipment and used for providing mechanical support for the dynamic ring 5 and the rotating equipment 10, and the static ring assembly 3 and the static part of the equipment are sealed through a first sealing element;
the rotating ring 5 is fixedly connected with a rotating device 10 through a transmission component, the rotating device 10 works to drive the rotating ring 5 to rotate, and the rotating ring 5 and the rotating device 10 are sealed through a second sealing element;
the elastic elements are arranged between the static part of the equipment and the static ring component 3 and used for keeping the dynamic ring 5 and the static ring component 3 attached.
Further, the inner circumferential surface of the movable ring 5 is a wave-shaped surface.
Further, the first sealing element is a first sealing O-ring 1, and the second sealing element is a second sealing O-ring 4.
Further, the static part of the equipment comprises a guide ring 8, and the bearing is connected with a main shaft of the working equipment through the guide ring 8;
the transmission component is a plurality of second screws 11 arranged at equal intervals, and the rotating ring 5 is fixedly connected with the rotating equipment 10 through the second screws 11;
the elastic element is spring 2, a plurality of spring 2 equidistance respectively set up the guide ring 8 with between the quiet ring subassembly 3.
Further, a movable ring supporting ring 7 is also installed in the inner hole between the rotating device 10 and the movable ring 5 in a matching mode.
Further, a third O-ring 6 is disposed between the movable ring support ring 7 and the movable ring 5.
Further, the guide ring 8 is fixedly connected with the stationary ring component 3 through a plurality of first screws 9 arranged at equal intervals.
Further, the rotating ring 5 is made of hard alloy materials, and the static ring component 3 is made of graphite materials.
On the other hand, the invention also discloses a nuclear reactor coolant pump in a nuclear power station, and the coolant pump is provided with the oil lubrication thrust bearing mechanical sealing system.
According to the mechanical sealing system of the oil lubrication thrust bearing, the outer circumferential surface of the static ring component is uniformly provided with a plurality of hydrodynamic grooves, and a multistage hydrodynamic effect is formed between the dynamic ring and the static ring component in the bearing operation process. The stable oil film is formed, and controllable lubricating oil leakage amount can be ensured while frictional wear of the contact surface is avoided. Thereby ensuring the long-time reliable and stable operation of the oil mechanical seal.
The nuclear reactor coolant pump in the nuclear power station also has corresponding technical effects due to the fact that the oil lubrication thrust bearing mechanical sealing system is installed.
Drawings
A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein the accompanying drawings are included to provide a further understanding of the invention and form a part of this specification, and wherein the illustrated embodiments of the invention and the description thereof are intended to illustrate and not limit the invention, as illustrated in the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of a mechanical seal system of an oil-lubricated thrust bearing according to an embodiment of the present invention;
fig. 2 is a schematic view of the internal structure of the hydrodynamic groove according to the embodiment of the present invention.
Detailed Description
The following description will be made with reference to the accompanying drawings, which illustrate an embodiment of the oil-lubricated thrust bearing mechanical seal system and the coolant pump according to the present invention.
First, the oil lubricates the mechanical seal system embodiment of the thrust bearing
As shown in fig. 1, the mechanical sealing system for the lubrication thrust bearing according to the embodiment is a non-integrated seal, specifically, the bearing is connected with a main shaft of a working device through a guide ring 8, 8 compression springs 2 are installed in a spring hole of the guide ring 8, a stationary ring component 3 is installed in the guide ring 8 and sealed by a first O- ring 1, 3 first screws 9 are inserted into an outer circle anti-rotation groove of the stationary ring component 3, and the stationary ring component 3 is made of graphite.
The movable ring 5 is installed in a matched manner with the rotating equipment 10, the movable ring supporting ring 7 is installed in an inner hole between the rotating equipment 10 and the movable ring 5 in a matched manner, and the second O-shaped ring 4 is installed in a groove formed in the end face of the rotating equipment 10 to ensure the sealing of the movable ring supporting ring 7; the third O-shaped ring 6 is arranged in a groove on the end face of the movable ring supporting ring 7, so that the sealing between the movable ring 5 and the movable ring supporting ring 7 is ensured; 4 second screws 11 are arranged in the rotating device 10, so that the second screws 11 enter the grooves on the outer circumference of the movable ring 5 and are screwed tightly; a plurality of hydrodynamic grooves are uniformly distributed on the outer circumferential surface of the static ring component 3.
As another embodiment, a plurality of hydrodynamic grooves are uniformly formed on the inner circumferential surface of the rotating ring 5, and are used for forming a multi-stage hydrodynamic effect between the rotating ring and the stationary ring assembly during the operation of the bearing.
The movable ring 5 is made of hard alloy materials, the inner circumferential surface of the movable ring 5 is a corrugated surface, a stable fluid dynamic pressure effect is generated when the movable ring 5 operates in a sealing mode, a stable oil film is formed, and friction and abrasion between the movable ring 5 and the outer circumferential surface of the static ring component 3 are avoided, so that long-time reliable and stable operation of oil mechanical sealing is guaranteed.
The special wave-shaped surface is different from a common dynamic pressure groove, the thickness and rigidity of a liquid film are uniformly and smoothly changed, step sudden change does not exist, the special wave-shaped surface has an excellent dynamic pressure effect, and the running performance is stable and reliable.
As shown in fig. 2, preferably, each hydrodynamic groove is composed of a plurality of hydrodynamic grooves with different depths, similar to a step type, and mainly utilizes the depth change of the hydrodynamic groove, when the device works, the contact surface of the moving ring 5 and the stationary ring component 3 forms a multi-stage hydrodynamic effect in the rotating process of the moving ring 5, and finally, a 3-5L/h mechanical sealing device capable of controllably leaking oil is realized.
Second, in the embodiment of the coolant pump of the nuclear reactor in the nuclear power station,
the oil lubrication thrust bearing mechanical seal system can be installed in a nuclear reactor coolant pump in a nuclear power station and used for mechanical seal of an oil lubrication thrust bearing, in the application, the rotating device 10 is an oil impeller, and the specific implementation mode of the lubrication thrust bearing mechanical seal system is described in the above embodiments and is not repeated here.
As described above, the embodiments of the present invention have been described in detail, and it is apparent that modifications which are obvious to those skilled in the art without substantially departing from the point and effect of the present invention are all included in the scope of the present invention.
Claims (4)
1. An oil lubricated thrust bearing mechanical seal system comprising a moving ring (5) and a stationary ring assembly (3), wherein:
the inner circumferential surface of the rotating ring (5) is matched with the outer circumferential surface of the static ring assembly (3) and is in rotating connection with the outer circumferential surface of the static ring assembly, and a plurality of hydrodynamic grooves are formed in the inner circumferential surface of the rotating ring (5); or the outer circumferential surface of the static ring component (3) is provided with a plurality of hydrodynamic grooves;
a plurality of dynamic pressure grooves with different depths are arranged in the hydrodynamic pressure groove, so that the interior of the hydrodynamic pressure groove is in a step shape;
the inner circumferential surface of the movable ring (5) is a wave-shaped surface;
the system further comprises: a stationary part of the apparatus, a rotating apparatus (10); the static part comprises a guide ring (8), the static ring component (3) is sleeved in the guide ring (8) and sealed by a first O-shaped ring (1), and a first screw (9) is inserted into an excircle anti-rotation groove of the static ring component (3); the guide ring (8) is fixedly connected with the static ring component (3) through a plurality of first screws (9) arranged at equal intervals;
the bearing is connected with a main shaft of the working equipment through a guide ring (8); the transmission component is a plurality of second screws (11) arranged at equal intervals, and the rotating ring (5) is fixedly connected with the rotating equipment (10) through the second screws (11); the elastic elements are a plurality of springs (2), and the springs (2) are respectively arranged between the guide ring (8) and the static ring assembly (3) at equal intervals;
the movable ring (5) is installed in a matched mode with the rotating equipment (10), the movable ring supporting ring (7) is installed in an inner hole between the rotating equipment (10) and the movable ring (5) in a matched mode, and the second O-shaped ring (4) is installed in a groove formed in the end face of the rotating equipment (10) so as to guarantee sealing of the movable ring supporting ring (7); a third O-shaped ring (6) is arranged in a groove on the end face of the movable ring supporting ring (7) to ensure the sealing between the movable ring (5) and the movable ring supporting ring (7); installing a second screw (11) into the rotating device (10) and enabling the second screw (11) to enter a groove on the outer circumference of the movable ring (5) and be screwed tightly;
the movable ring (5) is made of hard alloy materials, and the static ring component (3) is made of graphite materials.
2. The oil-lubricated thrust bearing mechanical seal system of claim 1,
the static ring assembly (3) is fixedly connected with a static part of equipment and used for providing mechanical support for the dynamic ring (5) and the rotating equipment (10), and the static ring assembly (3) and the static part of the equipment are sealed through a first O-shaped ring;
the movable ring (5) is fixedly connected with a rotating device (10) through a transmission part, the rotating device (10) works to drive the movable ring (5) to rotate, and the movable ring (5) and the rotating device (10) are sealed through a second O-shaped ring;
the springs are arranged between a static part of the equipment and the static ring component (3) and used for keeping the dynamic ring (5) attached to the static ring component (3).
3. Oil-lubricated thrust bearing mechanical sealing system according to claim 1, characterized in that a third O-ring (6) is provided between said moving ring support ring (7) and said moving ring (5).
4. A nuclear reactor coolant pump in a nuclear power plant, characterized in that an oil lubricated thrust bearing mechanical seal system as claimed in any one of claims 1 to 3 is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710800264.9A CN107477185B (en) | 2017-09-07 | 2017-09-07 | Oil lubrication thrust bearing mechanical sealing system and coolant pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710800264.9A CN107477185B (en) | 2017-09-07 | 2017-09-07 | Oil lubrication thrust bearing mechanical sealing system and coolant pump |
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| Publication Number | Publication Date |
|---|---|
| CN107477185A CN107477185A (en) | 2017-12-15 |
| CN107477185B true CN107477185B (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710800264.9A Active CN107477185B (en) | 2017-09-07 | 2017-09-07 | Oil lubrication thrust bearing mechanical sealing system and coolant pump |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828642B (en) * | 2019-04-16 | 2024-07-16 | 清华大学 | Mechanical seal and thrust bearing combined bearing device |
| CN111980960B (en) * | 2020-07-31 | 2024-07-16 | 中核核电运行管理有限公司 | Water seal device for mechanical seal of hydrodynamic pressure type main pump of nuclear power station |
| CN111810644A (en) * | 2020-07-31 | 2020-10-23 | 中核核电运行管理有限公司 | Follow-up sealing structure of hydrodynamic pressure type main pump mechanical seal of nuclear power station |
| CN111911632B (en) * | 2020-07-31 | 2024-07-16 | 中核核电运行管理有限公司 | Sealing assembly for mechanical seal of hydrodynamic main pump of nuclear power station |
| CN112161062B (en) * | 2020-09-27 | 2022-08-09 | 中国航发湖南动力机械研究所 | Combined sealing structure |
| CN113320673B (en) * | 2021-06-25 | 2023-06-02 | 中国舰船研究设计中心 | Thrust bearing device based on active thrust balance technology |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2391058Y (en) * | 1999-06-04 | 2000-08-09 | 北京航空航天大学 | Combined sealing device |
| CN101469771B (en) * | 2007-12-26 | 2010-12-29 | 丹东克隆集团有限责任公司 | Bidirectionally rotary cascade arc groove mechanical sealing end-face |
| CN101649834B (en) * | 2009-09-08 | 2011-03-02 | 合肥通用机械研究院 | Hydrostatic and hydrodynamic combined type three-stage mechanical seal device for nuclear main pump |
| CN102927282A (en) * | 2012-11-12 | 2013-02-13 | 西华大学 | Mechanical sealing device provided with depth-keeping ratio step groove end face sealing rings |
| CN105041709A (en) * | 2015-06-12 | 2015-11-11 | 霍凤伟 | Fluid dynamic pressure type mechanical seal used for nuclear main pump and mechanical seal system of nuclear main pump |
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| CN107477185A (en) | 2017-12-15 |
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Address after: 110869 No. 16 A Development Road, Shenyang Economic and Technological Development Zone, Liaoning Province Patentee after: SHENYANG BLOWER WORKS GROUP NUCLEAR POWER PUMP Co.,Ltd. Patentee after: Shenyang Blower Works Group Corp. Patentee after: SICHUAN SUNNY SEAL Co.,Ltd. Patentee after: CHINA NUCLEAR POWER ENGINEERING Co.,Ltd. Address before: 110869 No. 16 A Development Road, Shenyang Economic and Technological Development Zone, Liaoning Province Patentee before: SHENYANG BLOWER WORKS GROUP NUCLEAR POWER PUMP Co.,Ltd. Patentee before: SHENYANG BLOWER WORKS Group Corp. Patentee before: SICHUAN SUNNY SEAL Co.,Ltd. Patentee before: CHINA NUCLEAR POWER ENGINEERING Co.,Ltd. |