CN108167441B - Main shaft sealing and fog absorbing structure of generator - Google Patents
Main shaft sealing and fog absorbing structure of generator Download PDFInfo
- Publication number
- CN108167441B CN108167441B CN201810127610.6A CN201810127610A CN108167441B CN 108167441 B CN108167441 B CN 108167441B CN 201810127610 A CN201810127610 A CN 201810127610A CN 108167441 B CN108167441 B CN 108167441B
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- China
- Prior art keywords
- oil groove
- sealing
- sealing ring
- cover
- rotating shaft
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- 238000007789 sealing Methods 0.000 title claims abstract description 177
- 239000003595 mist Substances 0.000 claims abstract description 40
- 238000010521 absorption reaction Methods 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 90
- 230000000694 effects Effects 0.000 description 11
- 238000009434 installation Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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
-
- 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
- F16N—LUBRICATING
- F16N31/00—Means for collecting, retaining, or draining-off lubricant in or on machines or apparatus
- F16N31/02—Oil catchers; Oil wipers
-
- 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
- F16N—LUBRICATING
- F16N2210/00—Applications
- F16N2210/14—Bearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a main shaft sealing and oil mist absorbing structure of a generator, which comprises an oil groove and a rotating shaft which are arranged on a generator body, wherein an oil groove cover is arranged on the oil groove, a sealing cover is arranged on the oil groove cover, the oil groove cover seals a space between the oil groove and the rotating shaft to form a second sealing cavity, the sealing cover seals a space between the upper part of the oil groove cover and the rotating shaft to form a first sealing cavity, a first sealing element and a second sealing element are respectively arranged between the sealing cover and the rotating shaft and between the oil groove cover and the rotating shaft, the first sealing element comprises a first flexible sealing ring which is detachably arranged on the sealing cover and the inner side of which is clung to the outer wall of the rotating shaft, and the second sealing cavity comprises a second flexible sealing ring which is detachably arranged on the oil groove cover and the inner side of which is clung to the outer wall of the rotating shaft; and an oil mist collecting device communicated with the first sealing cavity and the second sealing cavity through a pipeline assembly is further arranged on the outer side of the oil groove. The main shaft seal and oil mist absorption structure of the generator can realize the seal of the rotating shaft and prevent the oil mist from overflowing.
Description
Technical Field
The invention relates to a generator, in particular to a main shaft sealing and oil mist absorbing structure of a generator.
Background
The existing bearings of the generator are required to be soaked in lubricating oil so as to prevent parts from being burnt out or blocked and the like, and the service life of the bearings is prolonged. Because the bearing is a high-speed rotating part, lubricating oil is stirred and impacted at a high speed in the oil groove, a large amount of bubbles are generated, and oil mist is formed after the bubbles burst. Meanwhile, due to the high-speed rotation of the rotor, a negative pressure area is formed above the lubricating oil groove cover, oil mist in the oil groove is sucked out and enters the air duct of the generator, and internal equipment of the generator is polluted after condensation, so that environmental pollution and potential safety hazards are caused.
In order to prevent oil mist generated in the operation process of power generation equipment from overflowing, the applicant has invented a device for preventing oil mist of a generator bearing from overflowing, the device is correspondingly provided with an oil groove cover between an oil groove and a rotating shaft, a sealing ring is sleeved between the oil groove cover and the rotating shaft, a sealing cavity is further formed, an air supplementing device and an air draft opening are respectively arranged on the oil groove cover or the sealing cavity, and the air draft opening is connected with an oil mist absorbing device through a pipeline. The device seals the oil groove mainly through sealing washer and oil groove lid, but after long-term operation, the sealed effect of sealing washer weakens to make the oil mist spill over from sealed clearance. Therefore, in order to provide the tightness of the oil groove, the applicant designs the oil groove as a double-chamber structure, specifically, a sealing cover is additionally arranged above an original oil groove cover or a sealing cavity to form a second chamber, so that even if the sealing ring at the sealing cover has poor effect, overflowed oil mist enters the second chamber and is communicated with a pipeline communicated with an oil mist absorbing device, and the overflowed oil mist is collected and sucked out.
After the second chamber is added, the applicant adopts an elastic sealing device (shown in fig. 1) arranged on the main shaft, wherein the elastic sealing device has a double-layer structure and consists of an upper elastic sealing ring, a lower elastic sealing ring and a connecting sleeve for connecting the upper elastic sealing ring and the lower elastic sealing ring. However, this elastic sealing device has the following problems: 1. because the elastic sealing ring adopts elastic sealing, after long-term use, the elasticity is still attenuated, and the sealing effect is poor. 2. The elastic sealing device is of an integral structure, and when the elastic sealing device is installed, the gap between the sealing rings cannot be adjusted in real time. 3. When the gap between the elastic sealing ring and the rotating shaft is adjusted, the shaft is easy to clamp, and oil leakage is easy to occur due to too loose.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problems that: if the generator main shaft sealing structure is provided, the gap between the sealing ring and the rotating shaft can be adjusted in real time, the installation is convenient, and the distance between the upper sealing ring and the lower sealing ring can be adjusted in real time.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a generator spindle seal structure, includes oil groove and the pivot of setting on the generator body, sets up the oil groove lid between oil groove and pivot, covers at the oil groove and is provided with sealed lid, the oil groove covers the space between oil groove and the pivot and seals, forms first sealed chamber, and sealed lid seals the space between oil groove top and the pivot, forms second sealed chamber, its characterized in that is equipped with a first sealing member and second sealing member respectively between sealed lid and pivot, between oil groove lid and the pivot, first sealing member includes a demountable installation and covers and the inboard first flexible sealing ring of hugging closely with the pivot outer wall at sealed, the second sealed chamber includes a demountable installation and covers the second flexible sealing ring of hugging closely with the pivot outer wall at the oil groove.
Like this, sealed lid and the clearance between oil groove lid and the pivot are sealed through first sealing member and second sealing member respectively, and this kind of split type seal structure makes operating personnel seal the clearance between oil groove lid and sealed lid and the pivot respectively, and then can not appear unable phenomenon of adjusting the clearance between the upper and lower sealing member. Simultaneously, adopt first sealing member and second sealing member to seal first sealed chamber and second sealed chamber respectively, not only can increase sealed effect, can also all carry the oil mist that overflows and the oil mist that directly produces in the oil groove in all through the pipeline and carry in the oil mist collection device. In addition, the sealing rings in the first sealing element and the second sealing element are flexible sealing rings and have certain ductility, so that the flexible sealing mode can be used for conveniently adjusting the gap between the rotating shaft and the sealing cover or the oil groove, and the operation is more flexible. The phenomenon of overlarge gap between the clamping shaft and the rotating shaft can not occur.
Further, the first flexible sealing ring and the second flexible sealing ring are detachably arranged on the sealing cover and the oil groove cover respectively through at least two fastening devices; all circumference is equipped with a plurality of screw holes on sealed lid and oil groove cover, all is equipped with a plurality of through-holes with screw hole one-to-one on first flexible sealing ring and second flexible sealing ring, fastener includes bolt and clamp plate, the bolt passes through threaded connection with the screw hole behind clamp plate, the first flexible sealing ring or the second flexible sealing ring.
Like this, through bolt and screw hole matched with mode to first flexible sealing ring and the detachable installation of second flexible sealing ring, both make things convenient for simultaneously, still be convenient for the later stage to first flexible sealing ring or second flexible sealing ring dismouting. Of course, the mode of locking by a plurality of bolts can also avoid the condition that the first flexible sealing ring and the second flexible sealing ring generate displacement due to the vibration caused by the rotation of the rotating shaft in the rotating process of the rotating shaft. In addition, the use of clamp plate not only can avoid the bolt to cover with sealed lid and oil groove lid hard contact, can also play the effect that prevents the oil mist from offering the through-hole department from first flexible sealing ring or second flexible sealing ring and overflow, further seal.
Furthermore, the first flexible sealing ring and the second flexible sealing ring are made of polymer flexible materials, the inner sides of the first flexible sealing ring and the second flexible sealing ring are provided with a conical sealing inner ring, the sealing inner ring is an inclined surface inclined towards the direction of the rotating shaft, and the inclined angle of the sealing inner ring is 5-45 degrees. Thus, the manufacturing of the first flexible sealing ring and the second flexible sealing ring is convenient, and the first flexible sealing ring and the second flexible sealing ring have better ductility effect. And the inclined surface part of the flexible sealing ring can be tightly attached to the rotating shaft when the flexible sealing ring is matched with the rotating shaft. When the gap between the rotating shaft and the sealing cover or the oil groove cover is increased, the inclination angle of the inclined plane is changed, and the state of being closely attached to the outer wall of the rotating shaft is always kept, so that the sealing effect is excellent.
Further, the threaded holes are uniformly distributed on the sealing cover and the oil groove cover, and the central axis of the threaded holes is parallel to the central axis of the main shaft. Thus, the manufacturing is convenient, and the first flexible sealing ring and the second flexible sealing ring are firmly installed at each position.
The utility model provides a generator oil absorption fog structure, it includes oil groove and the pivot of setting on the generator body, sets up the oil groove lid between oil groove top and pivot, is provided with sealed lid on the oil groove lid, the oil groove lid is sealed the space between oil groove and the pivot, forms the second sealed chamber, and sealed lid seals the space between oil groove top and the pivot, forms first sealed chamber, its characterized in that still is equipped with an oil mist collection device that communicates through a piping component with first sealed chamber and second sealed chamber in the oil groove outside, piping component includes with oil mist collection device's connecting pipe, the hose that communicates with first sealed chamber and the tee bend pipe that communicates connecting pipe, hose and second sealed chamber. After the first sealing cavity and the second sealing cavity are communicated with the oil mist collecting device through the pipeline assembly, oil mist in the two sealing cavities can be pumped at the same time, and meanwhile, the effect of balancing air pressure can be achieved.
Further, a through hole matched with one end of the three-way pipe is formed in the oil groove cover.
Compared with the prior art, the main shaft sealing structure of the generator has the following advantages:
1. The clearance between sealed lid and oil groove lid and the pivot is sealed through first sealing member and second sealing member respectively, and this kind of split type seal structure makes operating personnel seal the clearance between oil groove lid and sealed lid and the pivot respectively, and then can not appear unable phenomenon of adjusting the clearance between the upper and lower sealing member.
2. The sealing rings in the first sealing element and the second sealing element are flexible sealing rings and have certain ductility, so that the flexible sealing mode can be used for conveniently adjusting the gap between the rotating shaft and the sealing cover or the oil groove, and the operation is more flexible. The phenomenon of overlarge gap between the clamping shaft and the rotating shaft can not occur.
3. The first sealing cavity and the second sealing cavity are communicated with the oil mist collecting device through the pipeline assembly, and oil mist in the first sealing cavity and the second sealing cavity can be sucked out at the same time.
Drawings
FIG. 1 is a schematic partial cross-sectional view of a prior art shaft seal structure;
Fig. 2 is a schematic structural diagram of the main shaft sealing structure of the generator in the present embodiment when applied to an oil mist collecting device;
fig. 3 is a schematic view of a partial enlarged structure of a main shaft sealing structure of a generator in the present embodiment.
In the figure: the oil tank 1, the rotating shaft 2, the oil tank cover 3, the air pumping hole 31, the sealing cover 4, the first flexible sealing ring 5, the second flexible sealing ring 6, the bolt 7, the pressing plate 8, the hose 9, the tee pipe 10, the connecting pipe 11 and the oil mist collecting device 12.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Examples:
As shown in fig. 1, the present embodiment provides a main shaft sealing structure of a generator, including an oil groove 1 and a rotating shaft 2 which are disposed on a generator body, an oil groove cover 3 is disposed between the oil groove 1 and the rotating shaft 2, a sealing cover 4 is disposed on the oil groove cover 3, the oil groove cover 3 seals a space between the oil groove 1 and the rotating shaft 2 to form a second sealing cavity, and the sealing cover 4 seals a space between the upper side of the oil groove 1 and the rotating shaft 2 to form a first sealing cavity; the sealing cover 4 is provided with a first sealing piece and a second sealing piece between the sealing cover 4 and the rotating shaft 2 and between the oil groove cover 3 and the rotating shaft 2, and the first sealing cavity and the second sealing cavity can be further sealed through the first sealing piece and the second sealing piece respectively, so that the sealing effect is improved.
After adopting above-mentioned structure, in the operation in-process of pivot 2, the oil mist that pivot 2 stirring lubricating oil produced need retrieve through an oil mist collection device, and the suction. As shown in fig. 2, an air intake hole and an air suction hole 31 are provided in the oil sump cover 3, wherein the air suction hole 31 communicates with the oil mist collecting means 12 through a connecting pipe. In use, oil mist is sucked out through the air suction holes 31 and enters the oil mist collecting device 12 through the connecting pipeline. After long use, the sealing performance of the second sealing member at the lower layer is reduced, so that a smaller gap is formed between the rotating shaft 2 and the oil groove cover 3, and part of oil mist enters the first sealing cavity through the gap. For the above reasons, the connecting pipeline in the present embodiment includes the hose 9 connected to the sealing cover, the tee 10 having one end connected to the air suction hole 31, and the other two ends of the tee 10 are respectively connected to the hose 9 and the connecting pipe 11 connected to the oil mist collecting device 12. Therefore, when the sealing effect of the second sealing element is weakened, oil mist enters the first sealing cavity, enters the tee 10 through the hose 9, and enters the oil mist collecting device 12 through the tee 10 and the connecting pipe 11. Therefore, after the structure is adopted, the oil mist collecting effect is better.
Specifically, the first sealing member in this embodiment includes a first flexible sealing ring 5 detachably mounted on the sealing cover 4 and having an inner side in close contact with the outer wall of the rotating shaft 2, and the second sealing chamber includes a second flexible sealing ring 6 detachably mounted on the oil sump cover 3 and having an inner side in close contact with the outer wall of the rotating shaft 2. As shown in fig. 3, the mounting structure of the first flexible seal ring 5 and the second flexible seal ring 6 is specifically as follows: all circumference is equipped with a plurality of screw holes on sealed lid 4 and oil groove lid 3, all is equipped with a plurality of through-holes with screw hole one-to-one on first flexible sealing ring 5 and second flexible sealing ring 6, fastener includes bolt 7 and clamp plate 8, bolt 7 runs through behind clamp plate 8, first flexible sealing ring 5 or the second flexible sealing ring 6 and passes through threaded connection with the screw hole.
In this embodiment, the first flexible sealing ring 5 and the second flexible sealing ring 6 are made of rubber. The inner sides of the first flexible sealing ring 5 and the second flexible sealing ring 6 are respectively provided with a conical sealing inner ring, and the sealing inner rings are inclined planes which face the direction of the rotating shaft and have an inclination angle of 5-45 degrees. The threaded holes are uniformly distributed in the sealing cover 4 and the oil groove cover 3, and the central axis of the threaded holes is parallel to the central axis of the main shaft.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and although the applicant has described the present invention in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents of the technical solution of the present invention can be made without departing from the spirit and scope of the technical solution, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (3)
1. The utility model provides a generator oil absorption fog structure, it includes oil groove (1) and pivot (2) that set up on the generator body, sets up oil groove lid (3) between oil groove (1) top and pivot (2), is provided with sealed lid (4) on oil groove lid (3), oil groove lid (3) are sealed the space between oil groove (1) and pivot (2) together, form the second seal chamber, sealed lid (4) are sealed the space between oil groove (1) top and pivot (2) together, form first seal chamber, characterized in that, still be equipped with an oil mist collection device (12) that communicates with first seal chamber and second seal chamber through a piping component outside oil groove (1), piping component includes connecting pipe (11) with oil mist collection device (12), hose (9) with first seal chamber looks UNICOM, and connecting three-way pipe (10) with connecting pipe (11), hose (9) and second seal chamber looks; a first sealing piece and a second sealing piece are respectively arranged between the sealing cover (4) and the rotating shaft (2) and between the oil groove cover (3) and the rotating shaft (2), the first sealing piece comprises a first flexible sealing ring (5) which is detachably arranged on the sealing cover (4) and the inner side of which is tightly attached to the outer wall of the rotating shaft (2), and the second sealing cavity comprises a second flexible sealing ring (6) which is detachably arranged on the oil groove cover (3) and the inner side of which is tightly attached to the outer wall of the rotating shaft (2); the first flexible sealing ring (5) and the second flexible sealing ring (6) are detachably arranged on the sealing cover (4) and the oil groove cover (3) through at least two fastening devices respectively; the sealing cover (4) and the oil groove cover (3) are provided with a plurality of threaded holes in the circumferential direction, the first flexible sealing ring (5) and the second flexible sealing ring (6) are provided with a plurality of through holes corresponding to the threaded holes one by one, the fastening device comprises a bolt (7) and a pressing plate (8), and the bolt (7) penetrates through the pressing plate (8), the first flexible sealing ring (5) or the second flexible sealing ring (6) and then is connected with the threaded holes through threads; the first flexible sealing ring (5) and the second flexible sealing ring (6) are made of polymer flexible materials, the inner sides of the first flexible sealing ring (5) and the second flexible sealing ring (6) are provided with conical sealing inner rings, the sealing inner rings are inclined planes which face the direction of the rotating shaft, and the inclination angles of the sealing inner rings are 5-45 degrees.
2. The generator oil mist absorbing structure according to claim 1, characterized in that a through hole matched with one end of the three-way pipe (10) is formed in the oil groove cover (3).
3. The generator oil mist absorbing structure according to claim 1 or 2, characterized in that the threaded holes are uniformly distributed on the sealing cover (4) and the oil groove cover (3), and the central axis of the threaded holes is parallel to the central axis of the main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810127610.6A CN108167441B (en) | 2018-02-08 | 2018-02-08 | Main shaft sealing and fog absorbing structure of generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810127610.6A CN108167441B (en) | 2018-02-08 | 2018-02-08 | Main shaft sealing and fog absorbing structure of generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108167441A CN108167441A (en) | 2018-06-15 |
| CN108167441B true CN108167441B (en) | 2024-06-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810127610.6A Active CN108167441B (en) | 2018-02-08 | 2018-02-08 | Main shaft sealing and fog absorbing structure of generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108167441B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553035B (en) * | 2019-09-03 | 2021-02-09 | 东方电气集团东方电机有限公司 | Oil mist leakage prevention method |
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| CN207945296U (en) * | 2018-02-08 | 2018-10-09 | 张宏伟 | Generate electricity sump main shaft seal and area from absorbing smoke outwards structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3542316A1 (en) * | 1985-09-09 | 1987-03-12 | Kraftwerk Union Ag | DEVICE FOR LEAK OIL-FREE BEARING OIL EXTRACTION ON SLIDING BEARINGS FOR CIRCULAR SHAFTS OF HIGH-TOURED MACHINES |
| JP2003028387A (en) * | 2001-07-16 | 2003-01-29 | Mitsubishi Electric Corp | Oil mist preventing device for rotary electric machine |
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2018
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| CN102900941A (en) * | 2011-07-30 | 2013-01-30 | 哈尔滨迅普科技发展有限公司 | Filter type anti-vacuum oil mist absorbing cover |
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| CN108167441A (en) | 2018-06-15 |
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Effective date of registration: 20190404 Address after: 400054 Fourteenth Society of Huaxi Xianfeng Village, Banan District, Chongqing Applicant after: CHONGQING HUANENG HYDRO EQUIPMENT MANUFACTURING CO.,LTD. Address before: 400054 Chongqing Huaneng Hydropower Equipment Manufacturing Co., Ltd. Transfer Applicant before: Zhang Hongwei |
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