CN219953454U - Plugging device for oil return hole of engine end cover - Google Patents
Plugging device for oil return hole of engine end cover Download PDFInfo
- Publication number
- CN219953454U CN219953454U CN202321661772.0U CN202321661772U CN219953454U CN 219953454 U CN219953454 U CN 219953454U CN 202321661772 U CN202321661772 U CN 202321661772U CN 219953454 U CN219953454 U CN 219953454U
- Authority
- CN
- China
- Prior art keywords
- oil return
- main body
- return hole
- end cover
- oil
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- 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
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 239000003305 oil spill Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 118
- 238000012423 maintenance Methods 0.000 abstract description 26
- 230000000694 effects Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 239000010687 lubricating oil Substances 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000004904 shortening Methods 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241001584775 Tunga penetrans Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to an engine end cover oil return hole plugging device, which comprises: the appearance of the main body is larger than that of the oil return hole, the end part of the oil return hole is covered, and oil leakage holes are distributed on the main body; the filter screen is arranged on one side of the main body and is used for filtering oil entering the oil return hole; and the positioning structure is connected with the main body so as to be positioned with the outer end of the oil return hole and/or the inner hole of the oil return hole. The plugging device is used for realizing the effective foreign matter prevention requirements of the front and rear support bearings and the sealing tiles of the generator in the maintenance process of the front and rear support bearings and the sealing tiles of the generator, preventing the foreign matters from entering the GGR oil tank through the oil return pipe, so that the lubricating oil quality is poor, preventing larger foreign matters from entering the oil return pipe, leading to forced disassembly of the lower half of the end cover and the large oil return pipe, increasing unnecessary maintenance activities, improving the reliability of foreign matter prevention in the maintenance process and shortening the maintenance period.
Description
Technical Field
The utility model relates to the field of maintenance of nuclear power generators, in particular to an oil return hole plugging device of an engine end cover.
Background
The QFSN-1100-4 type generator of a certain nuclear power plant is a half-speed turbo generator of 1100MW, and all components are supplied by the equipment manufacturer in a complete set. The generator is characterized in that end covers are arranged on two sides of the generator, support bearings are arranged in the end covers and are used for supporting a generator rotor, two vertical downward oil return pipes are respectively arranged at the lower parts of the end covers and are respectively used for supporting oil return pipes of the bearings and oil return pipes of hydrogen side sealing oil.
The field discovery of host maintenance personnel, because the frequent start-stop top shaft oil is required to carry out the shaft coiling work in the overhaul process, the traditional block cloth is used for plugging the oil return pipe, so that the top shaft oil can not return oil through the oil return pipe, when the front and rear lower half oil baffles of the generator are dismantled, the oil leakage risk exists, the oil return pipe is not plugged, and the foreign matters or dust and the like which can cause maintenance enter a GGR (turbine lubrication, top shaft and jigger system) oil tank through the oil return pipe, so that the lubrication oil quality is poor. Fine foreign matters, dust, etc. are introduced, which will cause deterioration of GGR oil quality, prolonged oil filtration time and clogging of GGR filter. If larger foreign matters fall into the oil return pipe, the oil return capacity is poor, and the lower half large oil return pipe of the end cover needs to be disassembled, so that the overhaul period is delayed due to the addition of unnecessary maintenance activities.
If the common filter screen and the magnet are used for blocking, foreign matters enter the GGR oil tank through the oil return pipe due to the fact that the filter screen is easy to damage, so that the lubricating oil quality is poor.
In the maintenance activity process, the condition that a support bearing fixing bolt or a maintenance tool falls into an oil return pipe can occur, a filter screen and a magnet are used for fixing to seal, and large foreign matters cannot be guaranteed not to fall into the oil return pipe, for example, the lower half of the end cover must be disassembled once the large foreign matters fall into the oil return pipe, so that the maintenance period is delayed due to the fact that unnecessary maintenance activities are added.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an engine end cover oil return hole plugging device aiming at the defects in the prior art.
The technical scheme adopted for solving the technical problems is as follows: an engine end cover oil return hole plugging device is constructed, comprising:
the appearance of the main body is larger than that of the oil return hole, the end part of the oil return hole is covered, and oil leakage holes are distributed on the main body;
the filter screen is arranged on one side of the main body and is used for filtering oil entering the oil return hole; and
and the positioning structure is connected with the main body and is used for positioning the outer end of the oil return hole and/or the inner hole of the oil return hole.
In some embodiments, a retaining ring is also included that presses against the perimeter of the screen and engages the body for positioning.
In some embodiments, the retaining ring is welded or snap-fit or lock-fit with the body.
In some embodiments, the positioning structure includes a baffle connected to a side of the body and extending outwardly.
In some embodiments, the baffle is flush with the main body or offset relative to the main body toward the side of the screen.
In some embodiments, a side plate is provided on an outer edge of the baffle, the side plate extending from the baffle in a direction away from the body.
In some embodiments, oil spill holes are distributed on the side plates.
In some embodiments, the positioning structure further comprises a cylindrical positioning cylinder extending from the periphery of the main body to a side away from the filter screen.
In some embodiments, the occlusion device further comprises a handle disposed on the body, the handle and the screen being on the same side of the body.
The plugging device for the oil return hole of the engine end cover has the following beneficial effects: the plugging device realizes the effective foreign matter prevention requirement in the maintenance process of the front and rear support bearings and the sealing tiles of the generator, can prevent foreign matters from entering the GGR oil tank through the oil return pipe, so that the lubricating oil quality is poor, also prevents larger foreign matters from entering the oil return pipe, and causes the forced disassembly of the lower half of the end cover to the oil return pipe, so that unnecessary maintenance activities are increased, and the reliability of foreign matter prevention in the maintenance process is improved; thereby greatly improving the maintenance efficiency and shortening the maintenance period; the plugging device can be designed according to the actual size of the oil pipe at the lower part of the end cover of the nuclear power generator, is tightly attached and simple in structure, ensures the overall attractive effect during field maintenance, and effectively covers the oil return pipe at the lower part of the end cover of the nuclear power generator.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic cross-sectional view of a lower end cap according to an embodiment of the present utility model;
FIG. 2 is a schematic side view of a first plugging device for plugging an oil return pipe outside a lower end cover of a generator according to a first embodiment of the present utility model;
FIG. 3 is a schematic top view of the first plugging device of FIG. 2;
FIG. 4 is a schematic side view of a second plugging device for plugging an oil return pipe at the inner side of a lower end cover of a generator according to a first embodiment of the present utility model;
fig. 5 is a schematic top view of the second occluding device of fig. 2.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
As shown in fig. 1, the plugging device for the oil return hole of the engine end cover in a preferred embodiment of the present utility model can be used for plugging the oil return pipe 11 in the lower end cover 1 of the generator, and for the oil return pipe 11 on the outer side of the lower end cover 1 of the generator and the oil return pipe 11 on the inner side of the lower end cover 1 of the generator, plugging devices with different structures can be adopted to adapt to the pipe orifice structure of the oil return hole of the corresponding oil return pipe 11.
In some embodiments, the plugging device for the oil return hole of the engine end cover comprises a main body, a filter screen and a positioning structure, wherein the appearance of the main body is larger than that of the oil return hole, the end part of the oil return hole is capped, and oil leakage holes are distributed on the main body; the filter screen sets up one side of main part is in to getting into the oil return hole's oil filters, and the filter screen filters the foreign matter earlier, and the oil after the filtration enters into the oil return hole through the oil leak hole in the main part in, has guaranteed the purity of lubricating oil. The positioning structure is connected with the main body, and can be positioned at the position where the oil return hole is located, so that the plugging device is placed more accurately and stably.
Specifically, as shown in fig. 1 to 3, for the first plugging device 2 of the outer side oil return pipe 11 of the lower end cover 1, the first plugging device 2 comprises a first main body 21, a first filter screen 22 and a first positioning structure 23, the first main body 21 is larger than the shape of the oil return hole of the outer side oil return pipe 11 of the lower end cover 1, the end part of the oil return hole of the outer side oil return pipe 11 of the lower end cover 1 is capped, and the first oil leakage holes 211 are distributed on the first main body 21. The first main body 21 is made of a stainless steel plate with the thickness of 304 being 0.5mm, has the effect of strong bearing capacity, avoids heavy objects falling into an oil pipe in the maintenance process, has the thickness of 0.3mm, 0.6mm and the like, can play a supporting role, and can be formed by drilling the first main body 21 through the first oil leakage hole 211, wherein the diameter of the first oil leakage hole 211 is usually 3mm, and can also be 2.5mm, 3.5mm and the like. The first filter screen 22 filters oil entering the oil return hole of the oil return pipe 11 outside the lower end cover 1, and the aperture of the first filter screen 22 can be 0.125mm, so that fine foreign matters and dust can be filtered.
The first plugging device 2 further comprises a first positioning ring 24 which is used for pressing the periphery of the first filter screen 22 and is connected with the first main body 21 for positioning, and the periphery of the filter screen is fixed by the first positioning ring 24, so that the first filter screen 22 is prevented from falling off and being damaged. Preferably, the first positioning ring 24 is welded to the first main body 21, and the connection is stable and reliable. In other embodiments, the first positioning ring 24 and the first body 21 may also be fastened by a locking element.
The first positioning structure 23 is connected with the first main body 21 to be positioned with the outer end of the oil return hole of the oil return pipe 11 outside the lower end cover 1, so that the first plugging device 2 can be accurately placed. In some embodiments, the first positioning structure 23 includes a first baffle 231 connected to a side edge of the first body 21 and extending outwards, and may be positioned against an outer end of the oil return hole of the oil return tube 11 outside the lower end cap 1. Further, the first baffle 231 may be flush with the first main body 21, and the first baffle 231 may be offset from the first main body 21 toward the side where the first filter screen 22 is located, and may be positioned with an outer end step of the oil return hole of the oil return pipe 11 outside the lower end cover 1.
In this embodiment, a side plate 232 is disposed on the outer edge of the first baffle 231, and the side plate 232 extends from the first baffle 231 in a direction away from the first main body 21 and is positioned on the side surface of the outer end step of the oil return hole of the oil return pipe 11 outside the lower end cover 1. Preferably, oil spill holes 233 are distributed on the side plate 232, so that lubricating oil can flow downwards through the side plate 232 to the first filter screen 22.
The first plugging device 2 further comprises a first handle 25 arranged on the first main body 21, and the first handle 25 and the first filter screen 22 are positioned on the same side of the first main body 21, so that the first plugging device 2 can be conveniently installed and taken.
Further, as shown in fig. 4 and 5, in the case of the second plugging device 3 for plugging the oil return pipe 11 inside the lower end cover 1 of the generator, the second plugging device 3 includes a second main body 31, a second filter screen 32, and a second positioning structure 33, the second main body 31 is larger than the shape of the oil return hole of the oil return pipe 11 inside the lower end cover 1, the end of the oil return hole of the oil return pipe 11 inside the lower end cover 1 is capped, and second oil leakage holes 311 are distributed on the second main body 31. The second main body 31 is made of a stainless steel plate with the thickness of 304 being 0.5mm, has the effect of strong bearing capacity, avoids heavy objects falling into an oil pipe in the maintenance process, has the thickness of 0.3mm, 0.6mm and the like, can play a supporting role, and the second oil leakage hole 311 can be formed by drilling holes in the second main body 31, wherein the diameter of the second oil leakage hole 311 is usually 3mm, and can also be 2.5mm, 3.5mm and the like. The second filter screen 32 filters oil entering the oil return hole of the oil return pipe 11 at the inner side of the lower end cover 1, and the aperture of the second filter screen 32 can be 0.125mm, so that fine foreign matters and dust can be filtered.
The second plugging device 3 further comprises a second positioning ring 34 which is used for pressing the periphery of the second filter screen 32 and is connected with the second main body 31 for positioning, and the second positioning ring 34 is used for fixing the periphery of the filter screen so as to prevent the second filter screen 32 from falling off and being damaged. Preferably, the second positioning ring 34 is welded to the second main body 31, and the connection is stable and reliable. In other embodiments, the second positioning ring 34 and the second body 31 may be fastened by a locking element.
The second positioning structure 33 is connected with the second main body 31 to be positioned with the outer end of the oil return hole of the oil return pipe 11 at the inner side of the lower end cover 1, so that the second plugging device 3 can be accurately placed. In some embodiments, the second positioning structure 33 includes a second baffle 331 connected to a side edge of the second body 31 and extending outwards, and may be positioned against an outer end of the oil return hole of the oil return tube 11 inside the lower end cap 1. Further, the second baffle 331 may be flush with the second body 31, and is positioned in a manner of being attached to an outer end surface of the oil return hole of the oil return tube 11 inside the lower end cover 1.
The second positioning structure 33 further includes a cylindrical positioning cylinder 332 extending from the periphery of the second main body 31 to a side facing away from the second filter screen 32, so that the second positioning structure 33 is further positioned with an inner hole of the oil return tube 11 inside the lower end cover 1.
The second plugging device 3 further comprises a second handle 35 arranged on the second main body 31, and the second handle 35 and the second filter screen 32 are positioned on the same side of the second main body 31, so that the first plugging device 2 can be conveniently installed and taken.
The structures on the first plugging device 2 and the second plugging device 3 can be correspondingly combined and replaced according to the needs so as to adapt to different structures.
The plugging device realizes the effective foreign matter prevention requirement in the maintenance process of the front and rear support bearings and the sealing tiles of the generator, can prevent foreign matters from entering the GGR oil tank through the oil return pipe 11, so that the lubricating oil quality is poor, also prevents larger foreign matters from entering the oil return pipe 11, and causes the forced disassembly of the lower half-large oil return pipe 11 of the end cover, so that unnecessary maintenance activities are increased, and the reliability of foreign matter prevention in the maintenance process is improved; thereby greatly improving the maintenance efficiency and shortening the maintenance period; the plugging device is designed according to the actual size of the oil pipe at the lower part of the end cover of the nuclear power generator, is tightly attached and simple in structure, ensures the overall attractive effect during on-site maintenance, and effectively covers the oil return pipe 11 at the lower part of the end cover of the nuclear power generator.
It will be appreciated that the above technical features may be used in any combination without limitation.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (9)
1. An engine end cover oil return hole plugging device, which is characterized by comprising:
the appearance of the main body is larger than that of the oil return hole, the end part of the oil return hole is covered, and oil leakage holes are distributed on the main body;
the filter screen is arranged on one side of the main body and is used for filtering oil entering the oil return hole; and
and the positioning structure is connected with the main body and is used for positioning the outer end of the oil return hole and/or the inner hole of the oil return hole.
2. The engine end cover oil gallery plugging device of claim 1, further comprising a retaining ring compressing a periphery of the screen and positioned in connection with the body.
3. The engine end cover oil return hole plugging device according to claim 2, wherein the positioning ring is welded to the main body or is clamped or locked.
4. The engine end cover oil gallery plugging device of claim 1, wherein the locating structure includes a baffle plate connected to a side edge of the body and extending outwardly.
5. The engine end cover oil return hole plugging device according to claim 4, wherein the baffle is flush with the main body or is staggered relative to the main body toward the side where the filter screen is located.
6. The engine end cover oil return hole blocking device according to claim 4 or 5, characterized in that a side plate (232) is provided on an outer edge of the baffle plate, the side plate (232) extending from the baffle plate in a direction away from the main body.
7. The engine end cover oil return hole plugging device according to claim 6, wherein oil spill holes (233) are distributed on the side plate (232).
8. The engine end cover oil gallery shutoff device of any of claims 1-5, wherein the locating structure further includes a cylindrical locating cylinder (332) extending around the periphery of the main body to a side facing away from the screen.
9. The engine end cover oil gallery plugging device of any one of claims 1 to 5, further comprising a handle disposed on said body, said handle and said screen being on the same side of said body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321661772.0U CN219953454U (en) | 2023-06-27 | 2023-06-27 | Plugging device for oil return hole of engine end cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321661772.0U CN219953454U (en) | 2023-06-27 | 2023-06-27 | Plugging device for oil return hole of engine end cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219953454U true CN219953454U (en) | 2023-11-03 |
Family
ID=88553101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321661772.0U Active CN219953454U (en) | 2023-06-27 | 2023-06-27 | Plugging device for oil return hole of engine end cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219953454U (en) |
-
2023
- 2023-06-27 CN CN202321661772.0U patent/CN219953454U/en active Active
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