CN110285927B - Static lubricating oil sealing test device and method for front section of axial flow compressor - Google Patents
Static lubricating oil sealing test device and method for front section of axial flow compressor Download PDFInfo
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- CN110285927B CN110285927B CN201910628191.9A CN201910628191A CN110285927B CN 110285927 B CN110285927 B CN 110285927B CN 201910628191 A CN201910628191 A CN 201910628191A CN 110285927 B CN110285927 B CN 110285927B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
Abstract
The invention relates to a static lubricating oil sealing test device and a test method for the front section of an axial flow compressor, wherein the static lubricating oil sealing test device for the front section of the axial flow compressor comprises a detected device and a detection device, the detected device comprises an air inlet casing, an axial flow rotor, a bearing seat, a sealing box cover, a friction ring and a graphite sealing box, the detection device comprises an air source, an air pipe, a cover plate, a connecting pipe nozzle, a plug and oil absorption paper, the cover plate is used for sealing the end part of the inner cavity of an inner ring body, the plug is used for sealing an oil path, one end of the connecting pipe nozzle is communicated with the air source through the air pipe, and the other end of the connecting pipe nozzle penetrates; the oil absorption paper is arranged at the outer side end of the sealed box cover, when the oil absorption paper is used, the compressor shaft is vertical, the opening of the inner cavity is upward, lubricating oil is injected into the inner cavity of the inner ring body, gas is injected into the inner cavity, and whether leaked lubricating oil exists on the oil absorption paper or not is observed.
Description
Technical Field
The invention relates to the technical field of auxiliary equipment of aero-engines, in particular to a static lubricating oil seal test method for a front section of an axial flow compressor.
Background
With the application and rapid development of aero-engine inventions to present, various technologies are continuously improved and perfected, and a sealing system is always an important problem facing researchers. Two ends of a compressor shaft in the aircraft engine are fixed by bearings, and the bearings are cooled by lubricating oil during operation. The lubricating oil for cooling the bearing is sealed through a graphite end face sealing structure, and the mounting end face of the bearing seat is provided with a rubber ring for auxiliary sealing to prevent the lubricating oil from leaking.
When the aero-engine compressor works, if the sealing of a lubricating oil sealing system is not ideal, the lubricating oil leakage exceeds the standard, the cooling effect of a bearing is directly influenced, and the lubricating oil leaking into an engine flow passage is adhered to blades with substances such as dust, carbon deposition and the like, so that the roughness of the surfaces of the blades is changed, and the efficiency of the compressor is reduced.
Before the aircraft engine air compressor is assembled, static sealing tests can be carried out on the sealing device, such as matching air tightness tests of a graphite sealing box and a friction ring, and the sealing device is installed in the air compressor after being qualified. Therefore, the design of the static lubricating oil sealing test device and the test method for the front section of the axial flow compressor, which have the advantages of simple structure and easy operation, is a technical problem which needs to be solved urgently by a person skilled in the art.
Disclosure of Invention
The invention aims to solve the technical problem of providing a static lubricating oil sealing test device and a static lubricating oil sealing test method for the front section of an axial flow compressor, which are simple in structure and easy to operate.
In order to solve the technical problem, the static lubricating oil sealing test device for the front section of the axial flow compressor comprises a detected device and a detection device, wherein the detected device comprises an air inlet casing, an axial flow rotor, a bearing seat, a sealing box cover, a friction ring and a graphite sealing box; the outer side end of the bearing seat is provided with a friction ring, a sealing box cover and a graphite sealing box, the friction ring and the graphite sealing box are sequentially sleeved on the compressor shaft, and the graphite surface of the graphite sealing box is tightly pressed on the friction ring to form a main sealing surface; the outer ring wall of the graphite sealing box is in interference fit with the sealing box cover, and rubber rings for sealing are respectively arranged between the bearing seat and the binding surface of the air inlet casing and between the bearing seat and the binding surface of the sealing box cover; the detection device comprises an air source, an air pipe, a cover plate, a filler neck, a plug and oil absorption paper, wherein the cover plate is used for sealing the end part of the inner cavity of the inner ring body, the plug is used for sealing the oil path, one end of the filler neck is communicated with the air source through the air pipe, and the other end of the filler neck penetrates through the cover plate to be communicated with the inner cavity and is used for filling air into the inner cavity; the oil absorption paper is arranged at the outer side end of the sealed box cover, when the oil absorption paper is used, the compressor shaft is vertical, the opening of the inner cavity is upward, lubricating oil is injected into the inner cavity of the inner ring body, gas is injected into the inner cavity, and whether leaked lubricating oil exists on the oil absorption paper or not is observed.
Furthermore, the detection device also comprises a first-stage pressure reducing valve and a second-stage pressure reducing valve which are arranged on the vent pipe, wherein the first-stage pressure reducing valve is used for roughly adjusting the air inlet pressure, and the second-stage pressure reducing valve is used for finely adjusting the air inlet pressure.
The testing method of the static lubricating oil sealing testing device for the front section of the axial flow compressor comprises the following steps:
(A) preparation work before the test: after the front section of the compressor is assembled, the front section of the compressor is turned over by 90 degrees to enable an opening of an inner cavity of the inner ring body to be upward, an inner hole of a shaft of the compressor is plugged by a plug head, lubricating oil is poured into the inner cavity, and a bearing is immersed on the lubricating oil surface; plugging each oil way by a plug; the cover plate is covered on the inner cavity; one end of the breather pipe is screwed on the filler neck, and the other end of the breather pipe is communicated with the secondary pressure reducing valve and the primary pressure reducing valve and then finally connected to the gas source; the bleed air pressure can be adjusted by a primary pressure reducing valve and a secondary pressure reducing valve; and (4) putting the oil absorption paper to the lower part of the sealing box cover in a circle by using tweezers for collecting leaked lubricating oil.
(B) The test process comprises the following steps: opening a valve of an air source, adjusting the pressure to 0.7MPa, observing the air pressure value displayed by the secondary pressure reducing valve, wherein the up-and-down fluctuation of the air pressure is not more than 0.05 MPa; after the high-pressure gas is introduced into the inner cavity, the high-pressure gas is kept for not less than 15 minutes, and the pressure values displayed by the secondary pressure reducing valve and the primary pressure reducing valve are observed in the process, so that the pressure cannot jump greatly; and closing a valve of an air source, taking out the oil absorption paper by using tweezers, observing whether lubricating oil is on the oil absorption paper, and if not, indicating that the static lubricating oil seal of the front section of the whole compressor is qualified, so that the good lubricating oil seal of the front section of the compressor can be ensured when the engine works.
(C) If it is qualified to be experimental, directly pull down experimental frock, if experimental unqualified, then decompose each part of compressor anterior segment: and replacing the bearing seat rubber ring and the sealing box cover rubber ring, checking the graphite surface of the graphite sealing box and the friction ring working surface, replacing if the graphite surface is unqualified, and continuing the test after reassembling.
The invention has the technical effects that: (1) compared with the prior art, the static lubricating oil sealing test device and the test method for the front section of the axial flow compressor not only can independently perform the sealing test on the sealing device, but also can integrally perform the lubricating oil sealing test on the front section of the axial flow compressor, and can verify the static sealing effect of the front section of the axial flow compressor by considering whether the rubber ring seal of the mounting end surface is qualified or not; (2) the tool required by the test is simple and easy to process, the test process is simple and easy to operate, and the test effect is obvious.
Drawings
The invention is described in further detail below with reference to the drawings of the specification:
FIG. 1 is a schematic cross-sectional structure diagram of the static lubricating oil seal test device at the front section of the axial flow compressor after being clamped;
FIG. 2 is an axial schematic view of the components around the front bearing of the axial compressor of the present invention after the engine is assembled;
FIG. 3 is a schematic cross-sectional view of the components around the front bearing of the axial compressor of the present invention after the engine is assembled;
in the figure:
a gas source 1, a primary pressure reducing valve 11, a secondary pressure reducing valve 12, a vent pipe 13,
a cover plate 2, a filler neck 21, a cover plate screw 22,
an inner cavity 3, a small plug 31, a small plug rubber ring 32, a large plug rubber ring 33, a large plug 34, a large-diameter oil way 35, a small-diameter oil way 36,
an air inlet casing 4, an air inlet casing upper part 41, an air inlet casing base 42, an upper support plate 43, a left support plate 44, a lower support plate 45, a right support plate 46, an inner ring body 47, an outer ring body 48,
a bearing 6, a cushion block 61, a locking nut 62, a bearing inner ring 63, a bearing outer ring 64,
a bearing seat 7, a bearing seat mounting hole 71, an oil groove 72, an oil outlet 73,
the sealing box cover 8, the oil injection hole 81, the friction ring 82, the bearing seat rubber ring 83, the sealing box cover rubber ring 84, the oil injection cavity 85 and the graphite sealing box 86.
Detailed Description
Example 1
The static lubricating oil sealing test device for the front section of the axial flow compressor in the embodiment comprises a detected device and a detecting device, as shown in fig. 2 and fig. 3, the detected device comprises an air inlet casing 4, a bearing 6, a bearing seat 7, an axial flow rotor 5, a sealing box cover 8 and a graphite sealing box 86, the air inlet casing 4 comprises an inner ring body 47 and an outer ring body 48 which are transversely arranged, the inner ring body 47 is arranged in the outer ring body 48, the top end of the outer ring body 48 is provided with an air inlet casing upper part 41, the bottom end of the outer ring body 48 is provided with an air inlet casing base 42, an upper support plate 43, a lower support plate 45, a left support plate 44 and a right support plate 46 are radially arranged between the inner ring body 47 and the outer ring body 48, the upper support plate 45 is radially provided with a large-diameter oil passage 35 with the diameter of 16mm and two small-diameter oil passages 36 with the diameter of 12mm, the large-diameter oil passage 35 and the small-diameter oil passage, the lower support plate 45 is also provided with a large-diameter oil way 35 with the diameter of 16mm and two small-diameter oil ways 36 with the diameter of 12mm in the radial direction, and the large-diameter oil way 35 and the small-diameter oil ways 36 on the lower support plate 45 extend from the air inlet casing base 42 to the inner cavity 3 of the inner ring body 47 for oil passing when the axial flow compressor is in normal use.
When in assembly, the outer ring surface of the bearing seat 7 is in interference fit with the inner hole surface at the end part of the inner ring body 47 and is screwed on the bearing seat mounting hole 71 by screws, the bearing 6 is a ball bearing, the bearing outer ring 64 is in interference fit with the inner hole of the bearing seat 7, and the bearing inner ring 63 is in interference fit with the compressor shaft 52 of the axial flow rotor 5; one end face of the bearing outer ring 64 in the axial direction is attached to the bearing seat 7, and the other end face is screwed on the bearing seat 7 through the locking nut 62; the parts arranged on the compressor shaft 52 are sequentially provided with a friction ring 82, a bearing inner ring 63 and a cushion block 61, one end face of the friction ring 82 in the axial direction is attached to the bearing 6, the other end face of the friction ring 82 is abutted to a shaft shoulder 58 on the compressor shaft 52 and used for axially limiting the compressor shaft 52, the friction ring 82 and the cushion block 61 are in clearance fit with the compressor shaft 52, and the bearing inner ring 63 is in interference fit with the compressor shaft 52; the front end of the compressor shaft 52 is provided with a rotor shaft spline 53, a bevel gear 54 is sleeved at the front end of the compressor shaft 52 through the rotor shaft spline 53, and the bevel gear 54 is fixed through a lock ring 55 and a nut 57; an inner bore 59 is provided in the axial center of the compressor shaft 52.
The graphite sealing box 86 is sleeved on the compressor shaft 52, and the graphite surface of the graphite sealing box 86 is tightly pressed on the friction ring 82 to form a main sealing surface; the outer ring wall of the graphite sealing box 86 is in interference fit with the sealing box cover 8, a bearing seat rubber ring 83 is arranged on the binding surface of the bearing seat 7 and the air inlet casing 4 for auxiliary sealing, a sealing box cover rubber ring 84 is arranged on the binding surface of the bearing seat 7 and the sealing box cover 8 for auxiliary sealing, oil leakage of the binding surface is prevented, an oil spraying cavity 85 is formed among the sealing box cover 8, the graphite sealing box 86, the bearing seat 7 and the friction ring 82, and the outer end of the bearing 6 is arranged on one side of the oil spraying cavity 85.
In order to cool the bearing 6, a cooling oil path is arranged in the left support plate 44, an arc-shaped oil groove 72 is arranged on the outer side end face 49 of the inner ring body 47, an oil inlet of the cooling oil path is arranged on the outer side of the outer ring body 48, an oil outlet 73 of the cooling oil path is arranged at one end of the oil groove 72, a bearing seat oil path communicated with the oil groove 72 is arranged on the bearing seat 7, an oil injection hole 81 is arranged on the sealing box cover 8, one end of the oil injection hole 81 is communicated with an oil injection cavity 85, and the other end of the oil injection hole 81 is communicated with the bearing seat oil path, so that cooled lubricating oil can enter the oil injection cavity 85 through the cooling oil path, the oil groove 72, the bearing seat oil path and.
As shown in fig. 1, the detection device includes an air source 1, a vent pipe 13, a cover plate 2, a nozzle 21, a large plug 34 adapted to a large-diameter oil path 35, a small plug 31 adapted to a small-diameter oil path 36, and oil absorption paper 51, wherein the cover plate 2 is fixed at an end of an inner ring 47 by a cover plate screw 22 and is used for sealing an opening end of an inner cavity 3 of the inner ring, the 2 large plugs 34 are respectively used for sealing 2 large-diameter oil paths 35, the 4 small plugs 31 are respectively used for sealing 4 small-diameter oil paths 36, one end of the nozzle 21 is communicated with the air source 1 through the vent pipe 13, and the other end of the nozzle 21 passes through the cover plate 2 and is communicated with the inner cavity 3 and is used for filling; an inner hole 59 of the compressor shaft 52 is sealed and blocked by a plug 56, and an oil inlet plug is also arranged at an oil inlet of the cooling oil path for sealing; the oil absorption paper 51 is arranged at the outer side end of the sealing box cover 8, in order to accurately adjust the gas pressure entering the inner cavity 3, a first-stage pressure reducing valve 11 and a second-stage pressure reducing valve 12 are sequentially arranged on the vent pipe 13, the first-stage pressure reducing valve 11 is used for roughly adjusting the air inlet pressure, and the second-stage pressure reducing valve 12 is used for finely adjusting the air inlet pressure; when the oil-absorbing paper 51 is used, the compressor shaft 52 is vertically arranged, lubricating oil is injected into the inner cavity 3 of the inner ring body 47, air is injected into the inner cavity 3, and whether leaked lubricating oil exists on the oil-absorbing paper 51 or not is observed.
In order to ensure the oil path sealing effect, a large plug rubber ring 33 is arranged between each large plug 34 and the large-diameter oil path 35, and a small plug rubber ring 32 is arranged between each small plug 31 and the small-diameter oil path 36.
Example 2
The testing method of the static lubricating oil sealing testing device for the front section of the axial flow compressor comprises the following steps:
(A) preparation work before the test: after the front section of the compressor is assembled, the front section of the compressor is turned over by 90 degrees to enable an opening of an inner cavity 3 of the inner ring body 47 to be upward, an inner hole 59 of the compressor shaft 52 is blocked by a plug 56, lubricating oil is poured into the inner cavity 3, and the bearing 6 is immersed on the lubricating oil surface; a large plug 34 is used for plugging a large-diameter oil way 35, and a small plug 31 is used for plugging a small-diameter oil way 36; the cover plate 2 is covered on the inner cavity 3; one end of the vent pipe 13 is screwed on the filler neck 21, and the other end is communicated with the secondary pressure reducing valve 12 and the primary pressure reducing valve 11 and then finally connected into the gas source 1; the bleed air pressure can be adjusted by means of a primary pressure reducing valve 11 and a secondary pressure reducing valve 12; the oil absorption paper 51 is put to the lower part of the sealing box cover 8 along the circumferential direction in a circle by using tweezers for collecting leaked lubricating oil.
(B) The test process comprises the following steps: opening a valve of the gas source 1, adjusting the pressure to 0.7MPa, observing the air pressure value displayed by the secondary pressure reducing valve 12, wherein the air pressure fluctuation is not more than 0.05 MPa; after the high-pressure gas is introduced into the inner cavity 3, the high-pressure gas is kept for 15 to 20 minutes, and the pressure values displayed by the secondary pressure reducing valve 12 and the primary pressure reducing valve 11 are observed in the process, so that the pressure cannot jump greatly; and (3) closing a valve of the air source 1, taking out the oil absorption paper 51 by using tweezers, observing whether lubricating oil is on the oil absorption paper 51, and if not, indicating that the static lubricating oil seal of the front section of the whole air compressor is qualified, so that the good lubricating oil seal of the front section of the air compressor can be ensured when the engine works.
(C) If it is qualified to be experimental, directly pull down experimental frock, if experimental unqualified, then decompose each part of compressor anterior segment: and replacing the bearing seat rubber ring 83 and the sealing box cover rubber ring 84, checking the graphite surface of the graphite sealing box 86 and the working surface of the friction ring 82, replacing if the graphite surface is unqualified, and continuing the test after reassembling.
It should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious variations or modifications which fall within the spirit of the invention are intended to be covered by the scope of the present invention.
Claims (3)
1. The static lubricating oil sealing test device for the front section of the axial flow compressor is characterized by comprising a detected device and a detection device, wherein the detected device comprises an air inlet casing, an axial flow rotor, a bearing seat, a sealing box cover, a friction ring and a graphite sealing box; the outer side end of the bearing seat is provided with a friction ring, a sealing box cover and a graphite sealing box, the friction ring and the graphite sealing box are sequentially sleeved on the compressor shaft, and the graphite surface of the graphite sealing box is tightly pressed on the friction ring to form a main sealing surface; the outer ring wall of the graphite sealing box is in interference fit with the sealing box cover, and rubber rings for sealing are respectively arranged between the bearing seat and the binding surface of the air inlet casing and between the bearing seat and the binding surface of the sealing box cover; the detection device comprises an air source, an air pipe, a cover plate, a filler neck, a plug and oil absorption paper, wherein the cover plate is used for sealing the end part of the inner cavity of the inner ring body, the plug is used for sealing the oil path, one end of the filler neck is communicated with the air source through the air pipe, and the other end of the filler neck penetrates through the cover plate to be communicated with the inner cavity and is used for filling air into the inner cavity; the oil absorption paper is arranged at the outer side end of the sealed box cover, when the oil absorption paper is used, the compressor shaft is vertical, the opening of the inner cavity is upward, lubricating oil is injected into the inner cavity of the inner ring body, gas is injected into the inner cavity, and whether leaked lubricating oil exists on the oil absorption paper or not is observed.
2. The static oil seal test device for the front section of the axial compressor as claimed in claim 1, wherein the detection device further comprises a first-stage pressure reducing valve and a second-stage pressure reducing valve which are arranged on the vent pipe, the first-stage pressure reducing valve is used for rough adjustment of the air inlet pressure, and the second-stage pressure reducing valve is used for fine adjustment of the air inlet pressure.
3. The testing method of the static oil seal testing device for the front section of the axial flow compressor as claimed in claim 2, is characterized by comprising the following steps:
(A) preparation work before the test: after the front section of the compressor is assembled, the front section of the compressor is turned over by 90 degrees to enable an opening of an inner cavity of the inner ring body to be upward, an inner hole of a shaft of the compressor is plugged by a plug head, lubricating oil is poured into the inner cavity, and a bearing is immersed on the lubricating oil surface; plugging each oil way by a plug; the cover plate is covered on the inner cavity; one end of the breather pipe is screwed on the filler neck, and the other end of the breather pipe is communicated with the secondary pressure reducing valve and the primary pressure reducing valve and then finally connected to the gas source; the bleed air pressure can be adjusted by a primary pressure reducing valve and a secondary pressure reducing valve; placing the oil absorption paper to the lower part of the sealing box cover in a circle by using tweezers for collecting leaked lubricating oil;
(B) the test process comprises the following steps: opening a valve of an air source, adjusting the pressure to 0.7MPa, observing the air pressure value displayed by the secondary pressure reducing valve, wherein the up-and-down fluctuation of the air pressure is not more than 0.05 MPa; after the high-pressure gas is introduced into the inner cavity, the high-pressure gas is kept for not less than 15 minutes, and the pressure values displayed by the secondary pressure reducing valve and the primary pressure reducing valve are observed in the process, so that the pressure cannot jump greatly; closing a valve of an air source, taking out the oil absorption paper by using tweezers, observing whether lubricating oil is on the oil absorption paper, and if not, indicating that the static lubricating oil seal of the front section of the whole compressor is qualified, so that the good lubricating oil seal of the front section of the compressor can be ensured when the engine works;
(C) if it is qualified to be experimental, directly pull down experimental frock, if experimental unqualified, then decompose each part of compressor anterior segment: and replacing the bearing seat rubber ring and the sealing box cover rubber ring, checking the graphite surface of the graphite sealing box and the friction ring working surface, replacing if the graphite surface is unqualified, and continuing the test after reassembling.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011253268.8A CN112360795B (en) | 2019-07-12 | 2019-07-12 | Easy-to-operate static lubricating oil sealing test device for front section of axial flow compressor |
| CN202011253266.9A CN112360794B (en) | 2019-07-12 | 2019-07-12 | Working method of static lubricating oil sealing test device for front section of axial flow compressor |
| CN201910628191.9A CN110285927B (en) | 2019-07-12 | 2019-07-12 | Static lubricating oil sealing test device and method for front section of axial flow compressor |
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| CN201910628191.9A CN110285927B (en) | 2019-07-12 | 2019-07-12 | Static lubricating oil sealing test device and method for front section of axial flow compressor |
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| CN202011253266.9A Division CN112360794B (en) | 2019-07-12 | 2019-07-12 | Working method of static lubricating oil sealing test device for front section of axial flow compressor |
| CN202011253268.8A Division CN112360795B (en) | 2019-07-12 | 2019-07-12 | Easy-to-operate static lubricating oil sealing test device for front section of axial flow compressor |
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| CN110285927A CN110285927A (en) | 2019-09-27 |
| CN110285927B true CN110285927B (en) | 2020-12-01 |
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| CN202011253268.8A Active CN112360795B (en) | 2019-07-12 | 2019-07-12 | Easy-to-operate static lubricating oil sealing test device for front section of axial flow compressor |
| CN202011253266.9A Active CN112360794B (en) | 2019-07-12 | 2019-07-12 | Working method of static lubricating oil sealing test device for front section of axial flow compressor |
| CN201910628191.9A Active CN110285927B (en) | 2019-07-12 | 2019-07-12 | Static lubricating oil sealing test device and method for front section of axial flow compressor |
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| CN202011253268.8A Active CN112360795B (en) | 2019-07-12 | 2019-07-12 | Easy-to-operate static lubricating oil sealing test device for front section of axial flow compressor |
| CN202011253266.9A Active CN112360794B (en) | 2019-07-12 | 2019-07-12 | Working method of static lubricating oil sealing test device for front section of axial flow compressor |
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| CN111678705B (en) * | 2020-04-30 | 2022-06-07 | 中国航发南方工业有限公司 | Device for propeller sealing test and blade deflection angle adjustment test |
| CN112360793A (en) * | 2020-11-06 | 2021-02-12 | 中国船舶重工集团公司第七0三研究所 | Diffusion casing for large-flow ship gas turbine compressor test |
| CN112683457B (en) * | 2020-12-18 | 2022-04-19 | 成都成发泰达航空科技有限公司 | A testing arrangement that is used for APU front bearing rotor to seal sealing performance and life-span |
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| US3483970A (en) * | 1967-11-13 | 1969-12-16 | Reynolds Tobacco Co R | Pneumatic method and apparatus for testing cigarettes to detect loose ends and missing filter tips |
| US3717248A (en) * | 1971-12-10 | 1973-02-20 | H Scribner | Differential pressure bottle crown inspector employing fluidic control system |
| DE3716095C1 (en) * | 1987-05-14 | 1988-09-08 | Hamba Maschf | Cup filler for food and beverages, especially for dairy products |
| CN1161595C (en) * | 2002-01-28 | 2004-08-11 | 北京理工大学 | Platform for detecting leakage of pressurizing device |
| US8573655B2 (en) * | 2005-10-06 | 2013-11-05 | Car-Ber Investments Inc. | Pipe sealing tool with external clamp |
| CN2900944Y (en) * | 2006-05-08 | 2007-05-16 | 无锡威孚集团有限公司 | Seal part of supercharger air compressor end |
| US8661876B2 (en) * | 2011-05-06 | 2014-03-04 | General Electric Company | Apparatus, system, and method for testing a turbocharger |
| CN203636691U (en) * | 2013-12-03 | 2014-06-11 | 株洲南方燃气轮机成套制造安装有限公司 | Sealing fixture for pump of gas collecting chamber of compressor casing |
| CN207103186U (en) * | 2017-05-04 | 2018-03-16 | 无锡市伊维玛航空发动机纤维工程技术有限公司 | A kind of on-line Full sealing detection equipment conveying device of diesel engine cylinder cover |
| CN116754140A (en) * | 2017-06-27 | 2023-09-15 | 中国航发常州兰翔机械有限责任公司 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing and working method thereof |
| CN206889676U (en) * | 2017-06-27 | 2018-01-16 | 中国航发常州兰翔机械有限责任公司 | A kind of semi-contact graphite seal device |
| CN108019281B (en) * | 2017-12-26 | 2023-05-12 | 中科合肥微小型燃气轮机研究院有限责任公司 | Lubricating oil system of miniature gas turbine |
| CN109612655B (en) * | 2018-12-10 | 2021-01-15 | 中国航发四川燃气涡轮研究院 | Inter-shaft seal dynamic test device |
| CN109667669B (en) * | 2018-12-28 | 2020-08-25 | 中国科学院工程热物理研究所 | Gas turbine inlet casing |
| CN109736951B (en) * | 2019-01-16 | 2020-08-25 | 中国科学院工程热物理研究所 | Bearing lubricating and sealing system of rotor system of micro gas turbine |
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- 2019-07-12 CN CN202011253268.8A patent/CN112360795B/en active Active
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| CN112360795A (en) | 2021-02-12 |
| CN112360794A (en) | 2021-02-12 |
| CN112360795B (en) | 2022-05-27 |
| CN110285927A (en) | 2019-09-27 |
| CN112360794B (en) | 2022-05-27 |
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