CN214466100U - Maintenance-free efficient air sealing structure for generator oil groove - Google Patents
Maintenance-free efficient air sealing structure for generator oil groove Download PDFInfo
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- CN214466100U CN214466100U CN202120658885.XU CN202120658885U CN214466100U CN 214466100 U CN214466100 U CN 214466100U CN 202120658885 U CN202120658885 U CN 202120658885U CN 214466100 U CN214466100 U CN 214466100U
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Abstract
The utility model discloses a maintenance-free high-efficiency air sealing structure of a generator oil groove, wherein a wind screen is arranged on the upper surface of an oil groove cover and is arranged around a rotating shaft; an upper sealing tooth and a lower sealing tooth are arranged between the main shaft and the oil groove cover, and gaps are reserved between the upper sealing tooth and the main shaft and between the lower sealing tooth and the main shaft; a partition plate is arranged between the upper sealing tooth and the lower sealing tooth to divide the upper sealing tooth and the lower sealing tooth into an upper sealing cavity and a lower sealing cavity; the air inlet is arranged on the outer side of the wind shield and communicated with the upper sealing cavity through a pipeline; and a gas suction pipeline is connected and a gas processing device is connected in the lower sealed cavity. The utility model arranges an air inlet on the positive pressure area at the upper part of the oil groove cover, and the air in the positive pressure area enters the upper sealing cavity from the air inlet; the oil mist enters the lower sealing cavity through the gap between the main shaft and the lower sealing teeth, so that the oil mist in the oil groove is effectively blocked, the oil mist is prevented from overflowing from the gap between the main shaft and the upper sealing teeth, and a good air sealing structure is formed; meanwhile, the negative pressure above the oil groove cover can be counteracted, and oil mist is further prevented from overflowing from a gap between the main shaft and the upper sealing teeth.
Description
Technical Field
The utility model relates to an attached air supplement unit of generator, concretely relates to high-efficient airtight structure of generator oil groove non-maintaining.
Background
When the hydraulic or thermal power generator operates, a rotating shaft (main shaft) rotates at a high speed, a rotor of the generator is driven to rotate by the rotating shaft, and electric energy is generated between the rotor and the stator due to the cutting of magnetic lines of force to generate electricity. Because the rotating shaft rotates at a high speed, the bearing needs lubricating oil for lubricating, usually, an oil groove chamber is arranged around the bearing of the rotating shaft, the lubricating oil is sealed in the oil groove chamber, and an oil groove cover is arranged at the upper part of the oil groove chamber, so that the sealing performance is enhanced, and the pollution caused by the overflow of oil mist is prevented; the upper surface of the oil groove cover is provided with a wind shield, the wind shield is arranged around a rotating shaft, usually a circle, the inner side of the wind shield forms a roughly closed space to isolate the rotating shaft, a rotor, the oil groove and other parts, and a negative pressure area is formed in the inner area of the wind shield. The bearing of the power generation equipment is soaked in the lubricating oil, and the lubricating oil is collided in the oil groove at a high speed due to the fact that the bearing is a high-speed rotating part, so that the oil throwing phenomenon and the oil mist overflowing phenomenon are easy to occur, the environment is polluted, and insulation accidents are possibly caused.
And as the rotating speed of the unit increases, the diameter of the rotating shaft increases, the linear velocity increases, so that oil is sputtered everywhere and directly taken out by the rotating shaft, the oil is thrown outwards, and the surrounding environment is seriously polluted. And because the rotor rotates at a high speed, a negative pressure area is formed above the lubricating oil tank to suck out the oil mist in the oil tank, and the severity of the oil mist is increased.
Aiming at the oil mist problem of the water turbine generator set, the applicant applies an invention patent named as a device for preventing oil mist of a generator bearing from overflowing and having an application number of 2013106206840 on 29.11.2013, and the invention patent can play roles of preventing negative pressure, preventing oil from being thrown outwards, timely treating the oil mist and the like, but because the elastic sealing element is in close contact with the rotating shaft, the contact part of the elastic sealing element and the rotating shaft is worn, heat is generated, the elastic sealing element made of high polymer materials is easy to age, and the service life is shortened.
Disclosure of Invention
To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide a can long service life, effectively prevent the high-efficient airtight structure of maintenance-free of generator oil groove that oil mist from outwards spilling over.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a maintenance-free high-efficiency air sealing structure of a generator oil groove is disclosed, wherein the generator comprises a generator main shaft, the lower part of the generator main shaft is provided with the oil groove, and the upper part of the oil groove is provided with an oil groove cover; the upper surface of the oil groove cover is provided with a wind shield which is arranged around the rotating shaft; the sealing device is characterized in that an upper sealing tooth and a lower sealing tooth are arranged between the main shaft and the oil tank cover or above the oil tank cover around the main shaft, and gaps are reserved between the upper sealing tooth and the main shaft and between the lower sealing tooth and the main shaft to form gap type sealing; a partition plate is arranged between the upper sealing tooth and the lower sealing tooth, and a gap is reserved between the front end of the partition plate and the main shaft; the partition plate divides the space between the upper sealing tooth and the lower sealing tooth into an upper sealing cavity and a lower sealing cavity in the height direction; the air inlet is arranged on the outer side of the wind shield and is communicated with the upper sealing cavity through an air inlet pipeline; and the lower sealing cavity is connected with a gas suction pipeline, and the other end of the gas suction pipeline is connected with a gas processing device.
Thus, the utility model arranges a wind shield and an air inlet in the positive pressure area at the upper part of the oil groove cover, and the air in the positive pressure area enters the upper sealing cavity from the air inlet; the gas entering from the upper sealing cavity enters the lower sealing cavity through the gap between the main shaft and the lower sealing teeth, so that the oil mist in the oil groove is effectively blocked, the oil mist is prevented from overflowing from the gap between the main shaft and the upper sealing teeth, and a good gas sealing structure is formed; meanwhile, the negative pressure above the oil groove cover can be counteracted, and oil mist is further prevented from overflowing from a gap between the main shaft and the upper sealing teeth.
Further, a sealing brush is arranged around the main shaft above the upper sealing teeth, and the sealing brush is in contact with the main shaft without a gap. Therefore, the sealing brush has a good sealing effect, external gas is prevented from entering from a gap between the sealing brush and the main shaft, and oil mist in the oil groove can be prevented from overflowing from the gap.
Further, the clearance between the upper seal teeth 4 and the lower seal teeth 5 and the main shaft 1 is 0.5-1 mm. This gap can form a gas flow channel and also has a plugging effect.
Furthermore, more than one air inlet is arranged on the positive pressure area outside the wind shield. A plurality of air inlets are arranged in the positive pressure area, and automatically admit air to meet the plugging requirement; moreover, no additional fan or the like is needed to provide air inlet power.
Further, the sealing brush is made of soft materials. So that the friction between the sealing ring and the rotating main shaft is small, and the excellent sealing effect is achieved
Further, the wind deflector comprises three sections, a horizontal section, a vertical section and an oblique section connecting the horizontal section and the vertical section. Thus, the arrangement and the layout are convenient, and the inner negative pressure area and the outer positive pressure area are effectively formed.
In a word, the utility model discloses a high-efficient airtight structure of generator oil groove non-maintaining has following advantage:
1. a wind shield and an air inlet are arranged in a positive pressure area on the upper part of the oil groove cover, and air in the positive pressure area enters an upper sealing cavity from the air inlet; the gas entering from the upper sealing cavity enters the lower sealing cavity through the gap between the main shaft and the lower sealing teeth, so that the oil mist in the oil groove is effectively blocked, the oil mist is prevented from overflowing from the gap between the main shaft and the upper sealing teeth, and a good gas sealing structure is formed; meanwhile, the negative pressure above the oil tank cover can be counteracted, and oil mist is further prevented from overflowing from a gap between the main shaft and the upper sealing teeth;
2. the lower sealing cavity is connected with a gas suction pipeline, under the suction action of the gas treatment device, gas forms a flow path force from the air inlet, the upper sealing cavity, a gap between the main shaft and the lower sealing teeth, the lower sealing cavity and the suction opening to the gas suction pipeline, and oil mist in the lower sealing cavity is sucked to the gas treatment device for treatment; meanwhile, the gas flowing direction has an excellent oil mist blocking effect, so that oil mist is prevented from overflowing from a gap between the main shaft and the upper sealing teeth, and a good gas sealing structure is formed;
3. gaps are formed between the upper sealing teeth and the main shaft and are in a non-contact sealing structure, so that the service life of the elastic upper sealing teeth and the elastic lower sealing teeth is prolonged and remarkably improved;
4. the brush on the upper sealing teeth is in contact with the main shaft, so that a gap between the upper sealing teeth and the main shaft is blocked, external air is prevented from entering the gap, and oil mist in the oil groove can be prevented from overflowing from the gap;
5. the oil mist absorption device can enhance the integral oil mist absorption effect, prevent negative pressure, prevent oil mist from overflowing and prevent the oil mist from polluting the environment.
Drawings
FIG. 1 is a schematic view of an installation of a maintenance-free high-efficiency gas sealing structure of a generator oil groove;
fig. 2 is a partially enlarged view of fig. 1.
In the figure: the device comprises a main shaft 1, an oil groove 2, an oil groove cover 3, an upper sealing tooth 4, a lower sealing tooth 5, a partition plate 6, an upper sealing cavity 7, a lower sealing cavity 8, a wind shield 9, an air inlet 10, an air inlet 11, an air inlet pipeline 12, an air suction pipeline 13, an air treatment device 14 and a sealing brush 14.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example (b):
the generator in the prior art comprises a generator main shaft 1, wherein an oil tank 2 is arranged at the lower part of the generator main shaft 1, a thrust bearing and the like are arranged at the lower end of the main shaft 1 and soaked in lubricating oil in the oil tank 2 to form a lubricating and cooling structure, an oil tank cover 3 is arranged at the upper part of the oil tank 2, and the lubricating oil in the oil tank 2 is sealed in the oil tank 2; the wind shield 9 is arranged on the upper surface of the oil groove cover 3 or the upper part of the upper surface, the wind shield 9 is arranged around the rotating shaft, usually a circle, the inner side forms a roughly closed space to isolate the rotating shaft, the rotor, the oil groove and other parts, and a negative pressure area is formed in the inner area of the wind shield 9; a rotor rotating along with the generator main shaft 1 is arranged on the generator main shaft, and the rotor is matched with a fixed stator; the utility model provides a generator oil groove maintenance-free high-efficient airtight structure, around main shaft 1, between main shaft 1 and oil groove cover 3, or above oil groove cover 3, set up upper seal tooth 4 and lower seal tooth 5, leave the clearance between upper seal tooth 4 and lower seal tooth 5 and main shaft 1, form the clearance type and seal; the gap is typically 0.5-1 mm. A partition plate 6 is arranged between the upper seal teeth 4 and the lower seal teeth 5, and a gap is reserved between the front end of the partition plate 6 and the main shaft 1; the partition plate 6 divides a space between the upper seal teeth 4 and the lower seal teeth 5 into an upper seal chamber 7 and a lower seal chamber 8 in the height direction.
The air inlet 10 is arranged in a positive pressure area outside the wind shield 9, usually on or above the wind shield 9, so that when the main shaft 1 rotates, external air can more easily enter the air inlet 10 through the sealing and blocking effects of the wind shield 9 on the air; normally the wind deflector 9 is placed in the positive pressure region, blocking the air more strongly. The air inlet 10 is communicated with the upper sealed cavity 7, in the figure, the air inlet is communicated with the upper sealed cavity 7 through an air inlet pipeline 11, and air is introduced into the upper sealed cavity 7. A gas suction pipeline 12 is connected in the lower sealed cavity 8, the other end of the gas suction pipeline 12 is connected with a gas treatment device 13, when a motor of the gas treatment device 13 works, a suction effect is generated, oil-containing gas (oil mist) in the lower sealed cavity 8 is sucked into the gas treatment device 13 through the gas suction pipeline 12, oil stain treatment is carried out on the oil-containing gas, and the oil stain is separated and then discharged;
the utility model discloses a gas treatment device 13 can adopt prior art, like this applicant in the utility model patent of 2011-07-07 application, the name is "oil mist device is inhaled to the inline, and application number is 201120237483.9, can reach excellent treatment.
The sealing hairbrush 14 is arranged on the upper sealing tooth 4 and surrounds the main shaft 1, the sealing hairbrush 14 is contacted with the main shaft 1 without a gap, the gap between the upper sealing tooth and the main shaft is blocked, external air is prevented from entering from the gap, and oil mist in the oil groove can be prevented from overflowing from the gap; the sealing brush 14 is made of soft materials in the prior art, friction between the sealing brush and the rotating spindle is small, a good plugging effect is achieved, and meanwhile the sealing brush is arranged to be of a detachable installation structure, so that the sealing brush is convenient to replace after aging and failure.
The utility model provides a concrete structure of deep bead 9, including three-section, horizontal segment 91, vertical section 92 and the slant section 93 of connecting horizontal segment 91 and vertical section 92 make its inside roughly confined space that forms.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the applicant has described the present invention in detail with reference to the preferred embodiments, those skilled in the art should understand that those modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (5)
1. A generator oil groove maintenance-free high-efficiency air sealing structure comprises a generator main shaft (1), wherein an oil groove (2) is formed in the lower portion of the generator main shaft (1), an oil groove cover (3) is arranged on the upper portion of the oil groove (2), and a wind shield (9) is arranged on the upper surface of the oil groove cover (3); the oil tank sealing device is characterized in that an upper sealing tooth (4) and a lower sealing tooth (5) are arranged between the main shaft (1) and an oil tank cover (3) around the main shaft (1), and gaps are reserved between the upper sealing tooth (4) and the main shaft (1) and between the lower sealing tooth (5) and the main shaft (1) to form gap type sealing; a partition plate (6) is arranged between the upper sealing tooth (4) and the lower sealing tooth (5), and a gap is reserved between the front end of the partition plate (6) and the main shaft (1); the partition plate (6) divides the space between the upper sealing tooth (4) and the lower sealing tooth (5) into an upper sealing cavity (7) and a lower sealing cavity (8) in the height direction;
the air inlet (10) is arranged on the outer side of the wind shield (9) and is communicated with the upper sealing cavity (7) through an air inlet pipeline (11);
and a gas suction pipeline (12) is connected in the lower sealed cavity (8), and the other end of the gas suction pipeline (12) is connected with a gas processing device (13).
2. The generator oil tank maintenance-free high-efficiency air sealing structure as claimed in claim 1, characterized in that a sealing brush (14) is arranged around the main shaft (1) above the upper sealing teeth (4), and the sealing brush (14) is in contact with the main shaft (1) without leaving a gap.
3. The generator oil groove maintenance-free high-efficiency air sealing structure as claimed in claim 1, wherein the gap between the upper sealing tooth (4) and the lower sealing tooth (5) and the main shaft (1) is 0.5-1 mm.
4. The generator oil groove maintenance-free high-efficiency air sealing structure as claimed in any one of claims 1 to 3, wherein more than one air inlet (10) is arranged in the positive pressure area outside the wind shield (9).
5. The generator oil sump maintenance-free high-efficiency hermetic sealing structure according to claim 2, wherein the sealing brush (14) is a soft material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120658885.XU CN214466100U (en) | 2021-03-31 | 2021-03-31 | Maintenance-free efficient air sealing structure for generator oil groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120658885.XU CN214466100U (en) | 2021-03-31 | 2021-03-31 | Maintenance-free efficient air sealing structure for generator oil groove |
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| Publication Number | Publication Date |
|---|---|
| CN214466100U true CN214466100U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120658885.XU Active CN214466100U (en) | 2021-03-31 | 2021-03-31 | Maintenance-free efficient air sealing structure for generator oil groove |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110169A (en) * | 2021-11-22 | 2022-03-01 | 重庆华能水电设备制造有限公司 | Oil mist overflow prevention air outlet sealing structure of generator |
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2021
- 2021-03-31 CN CN202120658885.XU patent/CN214466100U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110169A (en) * | 2021-11-22 | 2022-03-01 | 重庆华能水电设备制造有限公司 | Oil mist overflow prevention air outlet sealing structure of generator |
| CN114110169B (en) * | 2021-11-22 | 2024-04-26 | 重庆华能水电设备制造有限公司 | Oil mist overflow prevention airtight structure of generator |
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