CN219777030U - Airtight test device for generator rotor conducting rod - Google Patents
Airtight test device for generator rotor conducting rod Download PDFInfo
- Publication number
- CN219777030U CN219777030U CN202321359448.3U CN202321359448U CN219777030U CN 219777030 U CN219777030 U CN 219777030U CN 202321359448 U CN202321359448 U CN 202321359448U CN 219777030 U CN219777030 U CN 219777030U
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- China
- Prior art keywords
- generator rotor
- plug
- conducting rod
- airtight test
- connecting pipe
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- 230000000903 blocking effect Effects 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 21
- 238000009423 ventilation Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000001307 helium Substances 0.000 description 8
- 229910052734 helium Inorganic materials 0.000 description 8
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 4
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
Abstract
The utility model discloses a generator rotor conducting rod airtight test device which comprises a safety protection cover, a first plug, a second plug, a connecting pipe, a pressure gauge, a pressure relief valve and a pressure relief valve, wherein the safety protection cover is used for being covered on the end face of a generator rotor; and an air column is arranged on the second plug and is communicated with the exhaust hole and the connecting pipe. According to the generator rotor conducting rod airtight test device, the pressure release valve and the pressure release valve are arranged on the connecting pipe connected with the air source, so that the operation of inflation and pressure release is convenient, and the safety and convenience of conducting rod airtight test operation are improved.
Description
Technical Field
The utility model relates to the technical field of airtight tests of generators, in particular to an airtight test device for a conductive rod of a generator rotor.
Background
On the generator, a generator rotor conducting rod is arranged in a central hole of a rotating shaft, and exciting current generated by an exciter is transmitted to a rotor winding, so that the normal operation of the generator is ensured. The stator core and the rotor of the generator are cooled by hydrogen, the conducting rod of the rotor is used as an excitation current path, and the conducting rod structurally needs to pass through the boundary of the hydrogen seal, so that the tightness of the conducting rod is very important, and the airtight test of the conducting rod is also an important work for overhauling the generator.
In order to ensure the tightness of the rotor conducting rod, two sealing flanges are arranged on the outer end face of the rotor conducting rod of the generator, and the tightness test of the conducting rod is to verify the tightness of the two sealing flanges. At present, the airtight test of the conducting rod is as follows: after plugging the vent hole between the two sealing flanges, injecting 10bar helium gas for maintaining pressure for 30 minutes, detecting all possible leakage points by using a helium detector, wherein the leakage rate of the helium gas in all detection areas is required to be less than 4 multiplied by 10 -4 cm 3 /sec (i.e. less than 4X 10 -5 Pa·m 3 /s). The test tool for the airtight test of the conducting rod only comprises a pressure gauge connector, a plug and a split safety cover, and is free of a gas decompression device and a post-test decompression device, so that the operation is inconvenient; the plug and the joint are poor in sealing, and repeated trial assembly is needed before the test to eliminate the leakage point of the test tool; the safety cover and the plug are simple in fastening mode, and poor in safety.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a safe, reliable, efficient and convenient airtight test device for a conductive rod of a generator rotor.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a generator rotor conducting rod airtight test device, including be used for covering the safety protection cover of establishing on the terminal surface of generator rotor, be used for shutoff respectively on the exhaust hole of generator rotor first end cap and second end cap, connect on the second end cap and be used for connecting the connecting pipe of air supply, set up manometer, relief valve and relief valve on the connecting pipe respectively;
and an air column is arranged on the second plug and is communicated with the exhaust hole and the connecting pipe.
Preferably, the safety protection cover comprises a cover body and a plurality of connecting lugs for fixing the cover body on the end face of the generator rotor; the connecting lugs are distributed at intervals along the circumferential direction of the cover body and are integrally connected to the cover body.
Preferably, the connecting pipe has opposite first and second ends, the first end of the connecting pipe being connected to the second plug, the pressure reducing valve being connected to the second end of the connecting pipe;
the pressure gauge and the pressure relief valve are sequentially connected between the first end and the second end of the connecting pipe.
Preferably, the first plug comprises a first blocking block matched on the outer surface of the generator rotor, a blocking column used for blocking in the exhaust hole of the generator rotor and at least two first sealing rings;
the first blocking piece is provided with a first surface and a second surface which are opposite, the blocking column protrudes out of the second surface of the first blocking piece, and the first sealing ring is sleeved on the blocking column.
Preferably, the first surface of the first block is further provided with at least one first groove for positioning the pipe clamp, and the bottom surface of the first groove is an arc surface.
Preferably, the first blocking piece is further provided with at least one first fastening hole penetrating through the first surface and the second surface of the first blocking piece.
Preferably, the second plug comprises a second blocking piece matched with the outer surface of the generator rotor, an air column used for blocking in an air exhaust hole of the generator rotor and at least two second sealing rings;
the second blocking piece is provided with a first surface and a second surface which are opposite, the connecting pipe is connected to the first surface of the second blocking piece, the ventilation column protrudes out of the second surface of the second blocking piece, and the second sealing ring is sleeved on the ventilation column.
Preferably, the first surface of the second block is further provided with at least one second groove for positioning the pipe clamp, and the bottom surface of the second groove is an arc surface.
Preferably, the second blocking piece is further provided with at least one second fastening hole penetrating through the first surface and the second surface.
Preferably, the generator rotor conducting rod airtight test device further comprises at least one pipe hoop used for wrapping the periphery of the generator rotor and hooping the first plug and the second plug on the generator rotor.
The utility model has the beneficial effects that: through set up relief valve and relief valve on the connecting pipe of connecting the air supply, aerify and pressure release convenient operation improves the security and the convenience of conducting rod airtight test operation.
In addition, through setting up at least twice sealing washer on the stifled head, improve sealing performance, reduce installation debugging time, improve test efficiency. The tightness of the plug on the generator rotor is increased through the pipe hoop, so that potential safety hazards are eliminated.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a generator rotor conducting rod airtight test apparatus according to an embodiment of the present utility model;
FIG. 2 is a schematic structural view of a first plug in a generator rotor conducting rod airtight test apparatus according to an embodiment of the present utility model;
FIG. 3 is a side view of the first plug of FIG. 2;
FIG. 4 is a schematic structural diagram of a second plug in a generator rotor conducting rod airtight test apparatus according to an embodiment of the present utility model;
fig. 5 is a side view of the second plug of fig. 4.
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 airtight test apparatus for a rotor conductive rod of a generator according to an embodiment of the present utility model includes a safety cover 30, a first plug 10 and a second plug 20, a connection pipe 40, a pressure gauge 50, a pressure release valve 60 and a pressure release valve 70.
The safety protection cover 30 is used for being covered on the end face of the generator rotor, mainly covering the center part of the end face of the generator rotor, and covering the end face of the conducting rod at the center of the rotor and the flange at the periphery of the conducting rod. According to the generator rotor having two vent holes from top to bottom, two vent holes radially extend to the conducting rod respectively, communicate the cavity between conducting rod and the rotor simultaneously, and first end cap 10 and second end cap 20 are used for shutoff respectively on two vent holes. The first plug 10 mainly plays a role in plugging the exhaust hole, the second plug 20 is connected with the connecting pipe 40 and also plays a role in ventilation, and helium is introduced into the exhaust hole during an airtight test.
The pressure gauge 50, the relief valve 60, and the relief valve 70 are provided on the connection pipe 40, respectively. The pressure gauge 50 is used to detect the air pressure at the time of the air tightness test. The pressure release valve 60 is used for releasing pressure when the air pressure is too high in the air tightness test process, so that the safety of the air tightness test is improved, and the pressure release valve can also be used for releasing pressure after the air tightness test. The pressure reducing valve 70 is used for reducing the air pressure entering the connecting pipe 40, i.e. reducing the air pressure from the air source to the test pressure, so as to avoid the air source outputting the air exceeding the test air pressure to the connecting pipe 40 and the exhaust hole, and improve the safety and the operation convenience of the airtight test.
In particular, the safety shield 30 may comprise a shield body 31 for shielding against the end face of the generator rotor, a number of attachment lugs 32 for securing the shield body 31 against the end face of the generator rotor. According to the generator rotor and the conductive bars, which are usually round bars, the cover 31 is also mainly circular. The plurality of connecting lugs 32 are distributed at intervals along the circumferential direction of the cover body 31, and can be integrally connected to the cover body 31 in a welding mode and the like, so that the installation process of the safety protection cover 30 on the generator rotor is simplified. Each of the connection lugs 32 is provided on the outer surface of the cover 31 so as to extend outward in the radial direction of the cover 31. After the cover 31 is fitted to the end face of the generator rotor, the connection lugs 32 are attached to the end face of the generator rotor in parallel, and the connection lugs 32 are locked to the end face by fasteners such as bolts, so that the safety cover 30 is fixed to the end face of the generator rotor.
In the embodiment shown in fig. 1, the safety shield 30 includes four evenly spaced connector lugs 32. Each connecting lug 32 is provided with a fastening hole 33 for the fastener to pass through.
Referring to fig. 1-3, the first plug 10 may further include a first plug 11 for fitting over the outer surface of the generator rotor, a plug stem 12 for plugging into a vent hole of the generator rotor, and at least two first seal rings 13. The first block 11 has first and second opposite surfaces; on the generator rotor, a first blocking piece 11 is upwards matched on the outer surface of the generator rotor by a first surface and covers over an exhaust hole; the second surface of the first block 11 faces the exhaust hole. The plug 12 is a solid post that protrudes over the second surface of the first plug 11 so as to be a tight fit into the vent. At least two first sealing rings 13 are sleeved on the plug 12, are distributed at intervals in the axial direction of the plug 12 and are used for sealing gaps between the plug 12 and the exhaust holes.
In order to fix the first block 11 to the outer surface of the generator rotor, the first surface of the first block 11 is provided with at least one first fastening hole 15 penetrating the first and second surfaces thereof, the first fastening hole 15 being adapted to cooperate with a fastener such as a bolt. The first plug 10 is fixed to the outer surface of the generator rotor by being fastened to the first fastening holes 15 and the fastening holes of the outer surface of the generator rotor by bolts or the like.
The second plug 20 may be generally identical in construction to the first plug 10, except that the second plug 20 also serves as a vent. In this regard, referring to fig. 1, 4 and 5, the second plug 20 comprises in particular a second plug 21 for fitting on the outer surface of the generator rotor, a vent post 22 for plugging in a vent hole of the generator rotor and at least two second sealing rings 23. The second block 21 has first and second opposite surfaces; on the generator rotor, the second blocking piece 21 is matched on the outer surface of the generator rotor with the first surface facing upwards and covers over an exhaust hole; the second surface of the second block 21 faces the exhaust hole. In contrast to the solid plug 12, the vent post 22 is a cylinder with a central passage, the vent post 22 protruding above the second surface of the second plug 21 so as to be a tight fit into the vent hole. At least two second sealing rings 23 are sleeved on the ventilation column 22, are arranged at intervals in the axial direction of the ventilation column 22, and are used for sealing gaps between the ventilation column 22 and the exhaust holes.
To secure the second block 21 to the outer surface of the generator rotor, the first surface of the second block 21 is provided with at least one second fastening hole 25 extending through the first and second surfaces thereof, the second fastening hole 25 being adapted to cooperate with a fastener such as a bolt. The second plug 20 is fixed to the outer surface of the generator rotor by being fastened to the second fastening holes 25 and the fastening holes of the outer surface of the generator rotor by bolts or the like.
In the first plug 10 and the second plug 20, the first block 11 and the second block 21 may be, but are not limited to, polygonal shapes such as rectangular shapes, circular shapes, elliptical shapes, and the like, respectively. The two sealing rings on the blocking column 12 and the ventilation column 22 are arranged, so that on the test site, the first blocking head 10 and the second blocking head 20 can be debugged within half an hour after being blocked on the exhaust hole, the pressure filling condition is achieved, and compared with a single sealing ring, the pressure filling condition is achieved only by 4 hours, the test efficiency is greatly improved, and the overhaul period is saved.
The connecting tube 40 is used to connect the second plug 20 to a gas source, typically helium, depending on the requirements of the air tightness test. The connecting tube 40 has opposite first and second ends; the first end of the connection pipe 40 is connected to the second plug 20, specifically to the first surface of the second plug 21, as shown in fig. 5, while the connection pipe 40 communicates with the vent column 22 of the second plug 20, and communicates with the vent hole through the vent column 22.
The pressure reducing valve 70 is connected to the second end of the connecting pipe 40, and the end of the pressure reducing valve 70 facing away from the connecting pipe 40 may be connected to an air source through a quick connector 90, or the end of the pressure reducing valve 70 facing away from the connecting pipe 40 may be connected to an air inlet pipe with a quick connector 90. The pressure gauge 50 and the pressure relief valve 60 are connected in sequence between the first and second ends of the connecting tube 40. Corresponding to the arrangement of the pressure gauge 50 and the pressure relief valve 60, the connecting pipes 40 can be respectively provided with branch pipe interfaces, so that the pressure gauge 50 and the pressure relief valve 60 are respectively detachably arranged on the corresponding branch pipe interfaces, and the pressure gauge and the pressure relief valve are convenient to replace and convenient to maintain in later period.
Further, the generator rotor conducting rod airtight test apparatus of the present utility model further comprises at least one pipe clamp 80. The pipe hoop 80 is used for winding the periphery of the generator rotor, hoops the first plug 10 and the second plug 20 on the generator rotor, and improves the installation stability of the first plug 10 and the second plug 20.
To increase the contact area of the pipe clamp 80 with the first and second plugs 10, 20, referring to fig. 1 to 3, at least one first groove 14 for positioning the pipe clamp 80 is provided on the first surface of the first block 11. The first groove 14 extends through opposite sides of the first surface in parallel with the passage direction of the pipe clamp 80, and the bottom surface of the first groove 14 is a cambered surface, so that the portion of the pipe clamp 80 passing through the first groove 14 can keep the bending degree of the pipe clamp 80 on the circumference positioned in the first groove 14. Similarly, referring to fig. 1, 4 and 5, the first surface of the second block 21 is provided with at least one second groove 24 for positioning the pipe clamp 80, the second groove 24 is parallel to the passing direction of the pipe clamp 80 and penetrates through two opposite sides of the first surface, and the bottom surface of the second groove 24 is a cambered surface.
In the embodiment shown in fig. 1, 2 and 4, the first block 11 is provided with two first grooves 14, the second block 21 is provided with two second grooves 24, and the generator rotor conducting rod airtight test device correspondingly comprises two pipe hoops 80, so that two hoops of the first plug 10 and the second plug 20 on the generator rotor are realized. The pipe clamp 80 is preferably a metal pipe clamp and has high structural strength.
When the generator rotor conducting rod airtight test device is applied, the whole device is installed on a generator rotor according to the state shown in fig. 1. The second end of the connecting tube 40 is connected to a helium source through a quick connector 90 and a hose, the air pressure is adjusted to a test pressure (e.g. 10 bar) through a pressure reducing valve 70, helium is filled into the exhaust hole and a chamber communicated with the exhaust hole, and after the pressure is maintained for a period of time (e.g. 30 minutes), all possible leakage points (including an outer flange on the end face of the generator rotor, a rotor vent hole and a radial conducting rod) on the generator rotor are detected through a helium detector.
After the airtight test, the air was discharged through the pressure release valve 60 on the connection pipe 40. And after the exhaust is completed, the generator rotor conducting rod airtight test device can be removed from the generator rotor.
The airtight test device for the generator rotor conducting rod is applicable to airtight tests of 1750MW generator rotor conducting rods, is simple in structure, convenient to operate and high in airtight test efficiency, saves overhaul period and eliminates potential safety hazards.
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 (10)
1. The airtight test device for the conducting rod of the generator rotor is characterized by comprising a safety protection cover, a first plug, a second plug, a connecting pipe, a pressure gauge, a pressure relief valve and a pressure relief valve, wherein the safety protection cover is used for being covered on the end face of the generator rotor, the first plug and the second plug are used for being respectively plugged on an exhaust hole of the generator rotor, the connecting pipe is connected to the second plug and used for being connected with an air source, and the pressure gauge, the pressure relief valve and the pressure relief valve are respectively arranged on the connecting pipe;
and an air column is arranged on the second plug and is communicated with the exhaust hole and the connecting pipe.
2. The generator rotor conducting rod airtight test device according to claim 1, wherein the safety protection cover comprises a cover body and a plurality of connecting lugs for fixing the cover body on the end face of the generator rotor; the connecting lugs are distributed at intervals along the circumferential direction of the cover body and are integrally connected to the cover body.
3. The generator rotor bar airtight test apparatus of claim 1, wherein said connecting tube has opposite first and second ends, said first end of said connecting tube being connected to said second plug, said pressure relief valve being connected to said second end of said connecting tube;
the pressure gauge and the pressure relief valve are sequentially connected between the first end and the second end of the connecting pipe.
4. The generator rotor conducting rod airtight test device according to claim 1, wherein the first plug comprises a first plug block for being matched on the outer surface of the generator rotor, a plug column for being plugged in an exhaust hole of the generator rotor and at least two first sealing rings;
the first blocking piece is provided with a first surface and a second surface which are opposite, the blocking column protrudes out of the second surface of the first blocking piece, and the first sealing ring is sleeved on the blocking column.
5. The device for airtight test of a conductive rod of a generator rotor according to claim 4, wherein at least one first groove for positioning a pipe hoop is further formed in the first surface of the first block, and the bottom surface of the first groove is an arc surface.
6. The device for airtight test of a rotor conducting rod of a generator according to claim 4, wherein the first block is further provided with at least one first fastening hole penetrating through the first surface and the second surface thereof.
7. The generator rotor conducting rod airtight test apparatus according to claim 1, wherein the second plug comprises a second plug block for being fitted on an outer surface of the generator rotor, an air vent column for being plugged in an air vent hole of the generator rotor, and at least two second sealing rings;
the second blocking piece is provided with a first surface and a second surface which are opposite, the connecting pipe is connected to the first surface of the second blocking piece, the ventilation column protrudes out of the second surface of the second blocking piece, and the second sealing ring is sleeved on the ventilation column.
8. The device for airtight test of a conductive rod of a generator rotor according to claim 7, wherein at least one second groove for positioning a pipe hoop is further formed in the first surface of the second block, and the bottom surface of the second groove is an arc surface.
9. The device for airtight testing of a rotor conducting rod of a generator according to claim 7, wherein the second block is further provided with at least one second fastening hole penetrating through the first surface and the second surface thereof.
10. The generator rotor pole tightness test apparatus of any of claims 1-9, further comprising at least one collar for wrapping around the generator rotor periphery, the collar for tightening the first and second plugs onto the generator rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321359448.3U CN219777030U (en) | 2023-05-30 | 2023-05-30 | Airtight test device for generator rotor conducting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321359448.3U CN219777030U (en) | 2023-05-30 | 2023-05-30 | Airtight test device for generator rotor conducting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219777030U true CN219777030U (en) | 2023-09-29 |
Family
ID=88108637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321359448.3U Active CN219777030U (en) | 2023-05-30 | 2023-05-30 | Airtight test device for generator rotor conducting rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219777030U (en) |
-
2023
- 2023-05-30 CN CN202321359448.3U patent/CN219777030U/en active Active
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