CN111828635A - Composite sealing device for shaft end of generator - Google Patents
Composite sealing device for shaft end of generator Download PDFInfo
- Publication number
- CN111828635A CN111828635A CN202010771379.1A CN202010771379A CN111828635A CN 111828635 A CN111828635 A CN 111828635A CN 202010771379 A CN202010771379 A CN 202010771379A CN 111828635 A CN111828635 A CN 111828635A
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- CN
- China
- Prior art keywords
- generator
- composite
- sealing device
- annular cavity
- sealing
- 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
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 43
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 244000126211 Hericium coralloides Species 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 description 7
- 238000004804 winding Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000630 rising effect 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
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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
- F16J15/3268—Mounting of sealing rings
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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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention relates to a composite sealing device of a generator shaft end, wherein comb tooth sealing strips (2) are pressed and embedded on an inner ring of a composite sealing body (3) and are respectively arranged in a group from inside to outside, a gap of 0.1mm is kept between the comb tooth sealing strips (2) and the surface of a rotating shaft (1), an annular cavity (7) is arranged in the composite sealing body (3), an air inlet pipe (4) is communicated with the annular cavity (7), and the composite sealing body (3) is fixed with an equipment shell (6) through a fastening bolt (5). According to the invention, external compressed air enters the annular cavity (7) through the air inlet pipe (4) to form micro-positive pressure, the cavity of the micro-positive pressure can block external air outside the sealing device, clean compressed air entering the generator cannot cause any adverse effect on the system, and polluted air outside the equipment shell (6) can be effectively prevented from entering the shell (6) when the clearance is too large after the comb sealing strip (2) is worn.
Description
Technical Field
The invention relates to a composite sealing device for a shaft end of a generator.
Background
The inside cooling to rotor and stator that adopts the air-cooled mode of circulation of present small-size generator, there is a coaxial pivoted fan respectively at the axle head of generator, the fan is very close to axle head sealing device, can the stroke little negative pressure when unit during operation axle head sealing device department, take in the outside air from the axle head sealing in the clearance department of main shaft, and axle head sealing device is very close again from the bearing frame, so the greasy dirt that the bearing frame leaked out will be taken into generator, pollute stator winding coil and other spare parts, cause the increase of the improvement of equipment fault rate and maintenance volume, conventional broach is sealed can not satisfy the requirement of this kind of operating mode, consequently, it is very necessary to develop an effectual axle head seal structure.
Disclosure of Invention
The invention aims to provide a composite sealing device at the shaft end of a generator, which can block outside air outside the sealing device, and clean compressed air entering the generator can not cause any adverse effect on a system. The technical scheme of the invention is as follows: the utility model provides a compound sealing device of generator shaft end, by axis of rotation (1), broach sealing strip (2), compound seal (3), intake pipe (4), fastening bolt (5) and equipment casing (6) are constituteed, the both sides of compound seal (3) respectively have an inner ring (8), two broach sealing strip (2) pressure equipment respectively are on two inner rings (8), two broach sealing strip (2) suit are on axis of rotation (1) external diameter, the surface of broach sealing strip (2) keeps 0.1 mm's clearance with axis of rotation (1) external diameter, there is annular cavity (7) that a cross-section is the U type in compound seal (3), intake pipe (4) communicate with each other with annular cavity (7) from compound seal (3) lateral wall, compound seal (3) are fixed together through fastening bolt (5) and equipment casing (6).
The working principle of the invention is as follows:
the invention provides a composite sealing device, wherein a U-shaped cavity is arranged in a composite sealing body, an air inlet pipe is communicated with the cavity, external compressed air enters the U-shaped cavity through the air inlet pipe to form micro-positive pressure, so that the air outside an equipment shell can be effectively prevented from entering the shell, a rotating shaft can vibrate along with the long-time rotation and operation of a generator, when the vibration exceeds a certain limit, a comb sealing strip is abraded, so that a gap is overlarge, and if the effect of the composite sealing is not realized, polluted air outside can be pumped into the generator. It is known that the rotating shaft (1) is a sliding bearing after extending out of the equipment shell (6), oil leakage is easy to occur at the oil seal of the bearing, leaked oil gas can permeate into the surrounding air, and if the composite seal does not exist, oil stains can be attached to the rotor and the stator winding in the generator after long-time operation, so that the insulation aging and the equipment failure rate are increased.
The invention has the technical effects that:
the invention adopts two combination types of comb tooth sealing and air sealing, effectively prevents external air from entering the inside of the generator, the comb tooth sealing is the first sealing, but the abrasion of the comb tooth can be caused by long-time operation, so that an overlarge gap is generated between the comb tooth and a rotating shaft, if the external air is not sealed, the external air can be pumped in, the external air enters the inside of the generator, so that oil stains are adhered on a rotor and a stator winding, and the fault occurs, but the problem can be effectively solved by the micro positive pressure of the U-shaped cavity, the external air can be blocked outside the sealing device by the cavity of the micro positive pressure, and the clean compressed air entering the inside of the generator can not cause any adverse effect on the system. The invention is suitable for shaft end sealing of a small generator and is widely applied to the thermoelectric industry.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged view.
The specific embodiment is as follows:
as shown in figure 1, a composite sealing device of generator shaft end, by axis of rotation 1, broach sealing strip 2, composite seal body 3, intake pipe 4, fastening bolt 5 and equipment casing 6 are constituteed, as shown in figure 2, the both sides of composite seal body 3 respectively have an inner ring 8, two broach sealing strips 2 pressure equipment respectively are on two inner rings 8, two broach sealing strips 2 suit are on 1 external diameter of axis of rotation, the surface of broach sealing strip 2 keeps 0.1 mm's clearance with 1 external diameter of axis of rotation, there is an annular cavity 7 that the cross-section is the U type in the composite seal body 3, intake pipe 4 communicates with each other with annular cavity 7 from 3 lateral walls of composite seal body, composite seal body 3 passes through fastening bolt 5 and is fixed together with equipment casing 6.
In the generator rotation process, because of various reasons, axis of rotation 1 can vibrate, in case vibration will cause wearing and tearing to broach sealing strip 2 more than 0.1mm, lead to the clearance too big, outside compressed air enters into annular cavity 7 through intake pipe 4 and forms the pressure-fired, can effectively prevent that the outside air of equipment casing 6 from getting into inside the casing 6, we know that axis of rotation 1 is a slide bearing after stretching out equipment casing 6, the easy oil leak of oil blanket department of bearing, the oil gas that leaks can be diffused in the air around, if do not have this compound sealed existence, will be stained with the greasy dirt on generator inside rotor and the stator winding after long-time operation, cause insulating ageing and the rising of equipment fault rate.
Claims (1)
1. A composite sealing device of a generator shaft end is characterized in that: by axis of rotation (1), broach sealing strip (2), composite seal (3), intake pipe (4), fastening bolt (5) and equipment casing (6) are constituteed, the both sides of composite seal (3) respectively have an inner ring (8), two broach sealing strip (2) pressure equipment respectively are on two inner ring (8), two broach sealing strip (2) suit are on axis of rotation (1) external diameter, the surface of broach sealing strip (2) keeps 0.1 mm's clearance with axis of rotation (1) external diameter, there is annular cavity (7) that a cross-section is the U type in composite seal (3), intake pipe (4) communicate with each other with annular cavity (7) from composite seal (3) lateral wall, composite seal (3) are together fixed through fastening bolt (5) and equipment casing (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010771379.1A CN111828635A (en) | 2020-08-04 | 2020-08-04 | Composite sealing device for shaft end of generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010771379.1A CN111828635A (en) | 2020-08-04 | 2020-08-04 | Composite sealing device for shaft end of generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111828635A true CN111828635A (en) | 2020-10-27 |
Family
ID=72919804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010771379.1A Pending CN111828635A (en) | 2020-08-04 | 2020-08-04 | Composite sealing device for shaft end of generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111828635A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2716600Y (en) * | 2004-06-23 | 2005-08-10 | 江苏南大紫金智能科技有限公司 | Shaft end sealing structure for powder processing equipment |
| EP1975410A1 (en) * | 2007-03-30 | 2008-10-01 | Anest Iwata Corporation | Rotor shaft sealing method and structure of oil-free rotary compressor |
| CN203939995U (en) * | 2014-07-23 | 2014-11-12 | 哈尔滨北方电力开发有限公司 | From airtight oil catch in place |
| CN204457882U (en) * | 2015-03-11 | 2015-07-08 | 马鞍山当涂发电有限公司 | A kind of combined type bearing housing shaft end seal system |
| CN204877555U (en) * | 2015-08-27 | 2015-12-16 | 茂名臻能热电有限公司 | Oil catch atmoseal device is prevented leaking by bearing box |
| CN205025812U (en) * | 2015-08-28 | 2016-02-10 | 西安陕鼓备件辅机制造有限公司 | Turbine compressor unit's shaft end sealing device |
| CN212377285U (en) * | 2020-08-04 | 2021-01-19 | 威立雅（哈尔滨）热电有限公司 | Composite sealing device for shaft end of generator |
-
2020
- 2020-08-04 CN CN202010771379.1A patent/CN111828635A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2716600Y (en) * | 2004-06-23 | 2005-08-10 | 江苏南大紫金智能科技有限公司 | Shaft end sealing structure for powder processing equipment |
| EP1975410A1 (en) * | 2007-03-30 | 2008-10-01 | Anest Iwata Corporation | Rotor shaft sealing method and structure of oil-free rotary compressor |
| CN203939995U (en) * | 2014-07-23 | 2014-11-12 | 哈尔滨北方电力开发有限公司 | From airtight oil catch in place |
| CN204457882U (en) * | 2015-03-11 | 2015-07-08 | 马鞍山当涂发电有限公司 | A kind of combined type bearing housing shaft end seal system |
| CN204877555U (en) * | 2015-08-27 | 2015-12-16 | 茂名臻能热电有限公司 | Oil catch atmoseal device is prevented leaking by bearing box |
| CN205025812U (en) * | 2015-08-28 | 2016-02-10 | 西安陕鼓备件辅机制造有限公司 | Turbine compressor unit's shaft end sealing device |
| CN212377285U (en) * | 2020-08-04 | 2021-01-19 | 威立雅（哈尔滨）热电有限公司 | Composite sealing device for shaft end of generator |
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