CN115013090B - Air bleeding mechanism for turbine engine - Google Patents
Air bleeding mechanism for turbine engine Download PDFInfo
- Publication number
- CN115013090B CN115013090B CN202210786690.2A CN202210786690A CN115013090B CN 115013090 B CN115013090 B CN 115013090B CN 202210786690 A CN202210786690 A CN 202210786690A CN 115013090 B CN115013090 B CN 115013090B
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- Prior art keywords
- ring
- sealing
- turbine engine
- static
- push rod
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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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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/30—Exhaust heads, chambers, or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a deflation mechanism for a turbine engine, which relates to the technical field of aero-engines and solves the problem that the existing deflation mechanism for the turbine engine is difficult to meet the requirements of an aircraft on size envelope and weight limitation of the turbine engine; the outer side of the static sealing ring is attached with a dynamic sealing ring, the axial end face of the inclined plane joint of the static sealing ring and the dynamic sealing ring is connected and locked through an axial baffle, and an actuating device is connected to the axial baffle; a sealing structure is connected between the sealing movable ring and the sealing static ring; under the condition of the same air release amount, compared with a traditional air release mechanism, the air release mechanism remarkably reduces the influence on the enveloping radius and the whole weight of the engine, and has the advantages of simple structure, high reliability and low cost.
Description
Technical Field
The invention relates to the technical field of aero-engines, in particular to the technical field of an air bleeding mechanism for a turbine engine.
Background
The air bleeding mechanism of the aircraft engine is an effective measure for improving the stable working range of the engine, and is widely applied to turbine engines with high supercharging ratios. A turbine engine is a form of engine that uses rotating parts to extract kinetic energy from a fluid passing through it, one type of internal combustion engine commonly used as an engine for aircraft and large ships or vehicles. All turbine engines have three major parts, a compressor, a combustor and a turbine. The compressor is generally divided into a low-pressure compressor (low-pressure stage) and a high-pressure compressor (high-pressure stage), the low-pressure stage sometimes also has the function of increasing the air intake amount of an intake fan, the incoming air flow is compressed into high-density, high-pressure and low-speed air flow in the compressor to increase the efficiency of the engine, after entering the combustion chamber, the air flow is injected with fuel by an oil supply nozzle, mixed and combusted with the air flow in the combustion chamber, and high-heat exhaust gas generated after combustion then pushes the turbine to rotate and is discharged through the nozzle or an exhaust pipe with residual energy.
At present, the air discharge mechanism of a conventional turbine engine usually adopts a structural form of a gas collecting cavity and an air discharge valve, and because the air discharge positions of the air discharge mechanism are concentrated, the structure size is large under the condition of a certain air discharge amount, and the air discharge mechanism is difficult to arrange on the engine.
Moreover, the bleed mechanism of the present turbine engine has difficulty in meeting the requirements of the aircraft on the size envelope and weight limit of the turbine engine in some application scenarios of the turbine engine with very strict control on the overall size and weight.
Disclosure of Invention
The invention aims to solve the problem that the existing air bleeding mechanism of the turbine engine is difficult to meet the requirements of an aircraft on the size envelope and the weight limit of the turbine engine in some application scenes of the turbine engine with strict overall dimension and weight control.
The invention specifically adopts the following technical scheme for realizing the purpose:
the air bleeding mechanism for the turbine engine comprises a sealing static ring which is integrated on the outer side of an engine case, wherein the sealing static ring is provided with an inclination angle inclined plane, a plurality of air vents are arranged on the inclination angle inclined plane, and the air vents avoid blades in the engine case and are uniformly distributed on the inclination angle inclined plane; a sealing moving ring is attached to the outer side of the sealing static ring, the axial end face of the inclined plane joint of the sealing static ring and the sealing moving ring is connected and locked through an axial baffle, and an actuating device is connected to the axial baffle; and a sealing structure is connected between the sealing movable ring and the sealing static ring.
When the actuating device moves axially, two part of loads need to be overcome, one is the air pressure axial component force when the air compressor works; secondly, the sealing structure is compressed to achieve the sealing effect, so that a plurality of actuating devices can be uniformly arranged on the circumference to ensure that the actuating devices can provide enough and uniform axial pressure, and the reliable work of the sealing structure can be effectively ensured.
The working principle is as follows: this gassing mechanism realizes gassing and sealing through the axial distance between adjustment sealed rotating ring and the sealed quiet ring, under the encapsulated situation, sealed quiet ring is by acting the device and applying load, extrusion seal structure realizes sealedly, when needs gassing, it drives sealed rotating ring axial displacement to actuate the device, make the interior compressed air of compressor get into the annular passage between sealed rotating ring and the sealed quiet ring from the exhaust hole of sealed quiet ring, and along the axial to both sides exhaust, in the motion process, accessible control sealed rotating ring axial displacement controls the exhaust area, after the gassing is ended, it actuates the device again to opposite direction, the sealed rotating ring of pulling returns initial position, can close gassing mechanism.
The utility model provides an air bleeder compares in traditional gas collecting chamber and the concentrated air bleeder of gassing valve under the condition of the same air release volume, is showing and has reduced the influence to engine envelope radius and whole weight, and this air bleeder's simple structure, and the reliability is high, and the cost is also low.
Furthermore, the sealing structure comprises a rubber ring groove arranged on the inclined angle inclined plane of the sealing static ring, a sealing rubber ring is connected in the rubber ring groove, and the sealing rubber ring is fixed in the rubber ring groove through vulcanization.
When the sealing is realized, the sealing rubber ring fixed on the sealing static ring can be realized by compressing and vulcanizing the load applied by the actuating device.
This application has strengthened the sealed effect between sealed rotating ring and the sealed quiet ring through connecting sealed rubber ring on sealed quiet ring, adopts vulcanization process to connect sealed rubber ring in the rubber ring inslot simultaneously, makes sealed rubber ring's connection more stable, also can play the effect of the sealed effect of reinforcing equally.
Furthermore, the actuating device comprises an electric push rod, an installation fixing seat is connected to the engine casing, one end of the electric push rod is connected to the installation fixing seat, and the other end of the electric push rod is connected to the sealing movable ring.
The electric push rod is selected according to actual conditions, and small-sized products are selected by considering load, stroke and actuating speed at the same time so as to control the size and weight of the actuating device.
Furthermore, a multi-flap central symmetrical structure is adopted on the circumference of the sealing movable ring; the two ends of the arc surface forming the sealing movable ring are respectively provided with a tenon and a mortise matched in a wedge shape.
And the tenon and the mortise are in small interference fit, and sealant is coated on the interference fit surface.
When the sealing movable ring is assembled, a proper amount of sealant is coated on the interference fit surface, so that the sealing reliability of the sealing movable ring is ensured.
The two ends of the arc surface of the sealing movable ring are respectively provided with the tenon and the mortise matched with each other in a wedge shape, and the tenon and the mortise are matched in a small interference manner, so that the radial positioning between the multi-petal symmetrical structures can be realized.
Furthermore, the front end face of the sealing movable ring is provided with a threaded hole used for being connected with the axial baffle.
When the connecting bolt between the axial baffle and the sealing movable ring is installed, the circumferential uniform stress is ensured, and the mounting hole can be properly repaired when necessary, so that the electric push rod is prevented from generating overlarge prestress.
Further, when the stroke of the movable sealing ring is maximum, the distance between the movable sealing ring and the conical surface of the static sealing ring is greater than a deflation requirement value.
If the distance between the conical surfaces of the sealing movable ring and the sealing static ring does not meet the requirement, the thickness of the mounting edge of the mounting fixed seat or the axial baffle plate can be adjusted through repairing.
Further, the installation method of the air release mechanism comprises the following steps: the installation fixing seat is fixedly connected with an engine casing, the electric push rod is fixed on the installation fixing seat, then the multi-segment arc-shaped block of the sealing movable ring is axially attached to the outer side of the sealing static ring, then the axial direction of the multi-segment arc-shaped block is pressed into the tongue-and-groove fit, the axial baffle plate and the front end face of the sealing movable ring are attached and the bolt is not installed for the moment to be fixed, the axial baffle plate and the front end face of the sealing movable ring move along the axial direction after being attached, the installation hole of the axial baffle plate is aligned with the installation boss at the front end of the electric push rod, the front end of the electric push rod is fixed on the axial baffle plate, then the connecting bolt between the axial baffle plate and the sealing movable ring is installed, and when the bolt is installed, the circumferential uniform stress is guaranteed.
The invention has the following beneficial effects:
(1) Compared with the traditional centralized air bleeding mechanism of the air collecting cavity and the air bleeding valve, the air bleeding mechanism of the engine has the advantages that under the condition of the same air bleeding amount, the influence on the enveloping radius and the whole weight of the engine is remarkably reduced, and the air bleeding mechanism is simple in structure, high in reliability and low in cost;
(2) According to the sealing device, the sealing effect between the movable sealing ring and the static sealing ring is enhanced by connecting the sealing rubber ring to the static sealing ring, and meanwhile, the sealing rubber ring is connected to the rubber ring groove by adopting a vulcanization process, so that the sealing rubber ring is more stably connected, and the sealing effect can be enhanced;
(3) The tenon and the mortise which are matched in a wedge shape are respectively arranged at two ends of the arc surface which forms the sealing movable ring, and the tenon and the mortise are in small interference fit, so that the radial positioning between the multi-petal symmetrical structures can be realized.
Drawings
FIG. 1 is a schematic view of a bleed mechanism for a turbine engine according to the present invention;
FIG. 2 is a schematic view of the construction of a stationary seal ring according to the present invention;
FIG. 3 is a schematic structural view of a seal rotating ring according to the present invention;
fig. 4 is a schematic structural view of a circular arc surface forming a sealing moving ring in the invention.
Reference numerals: 01-a sealing static ring, 02-an axial baffle, 03-an actuating device, 04-a mounting fixed seat, 05-a sealing movable ring, 06-an engine case, 07-an exhaust hole, 08-a sealing rubber ring, 09-an arc surface, 10-a mortise and 11-a tenon.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example 1
Referring to fig. 1 to 4, the embodiment provides an air bleeding mechanism for a turbine engine, which includes a stationary sealing ring 01 integrally integrated on the outer side of an engine case 06, wherein the stationary sealing ring 01 has an inclined angle slope, a plurality of air bleeding holes 07 are formed on the inclined angle slope, and the air bleeding holes 07 avoid blades inside the engine case 06 and are uniformly distributed on the inclined angle slope; a sealing moving ring 05 is attached to the outer side of the sealing static ring 01, the axial end face of the inclined plane joint of the sealing static ring 01 and the sealing moving ring 05 is connected and locked through an axial baffle 02, and an actuating device 03 is connected to the axial baffle 02; and a sealing structure is connected between the sealing movable ring 05 and the sealing static ring 01.
When the actuating device 03 moves axially, two part of loads need to be overcome, one is the air pressure axial component force when the air compressor works; secondly, the sealing structure is compressed to achieve the sealing effect, so that a plurality of actuating devices 03 can be uniformly arranged on the circumference to ensure that the actuating devices 03 can provide enough and uniform axial pressure, and the reliable work of the sealing structure can be effectively ensured.
The working principle is as follows: this air release mechanism realizes gassing and sealing through adjusting the axial distance between sealed rotating ring 05 and the sealed quiet ring 01, under the encapsulated situation, sealed quiet ring 01 is exerted load by actuating device 03, the extrusion seal structure realizes sealedly, when needing to bleed, it drives sealed rotating ring 05 axial displacement to actuate device 03, make the interior compressed air of compressor get into the annular channel between sealed rotating ring 05 and the sealed quiet ring 01 from sealed quiet ring 01's exhaust hole 07, and along the axial to both sides exhaust, in the motion process, accessible control sealed rotating ring 05 axial displacement control exhaust area, after the gassing is finished, actuate device 03 again to opposite direction actuation, pull sealed rotating ring 05 and get back to the initial position, can close air release mechanism.
The utility model provides an air bleeder mechanism, under the condition of the same volume of bleeding, compare in traditional gas collecting chamber and the concentrated air bleeder mechanism of gassing valve, is showing and has reduced the influence to engine envelope radius and whole weight, and this air bleeder mechanism's simple structure, the reliability is high, and the cost is also low.
Example 2
Referring to fig. 1 to 4, based on embodiment 1, the sealing structure of this embodiment includes a rubber ring groove provided on an inclined plane of the stationary seal ring 01, a seal rubber ring 08 is connected in the rubber ring groove, and the seal rubber ring 08 is fixed in the rubber ring groove by vulcanization.
When the sealing is realized, the sealing rubber ring 08 fixed on the sealing static ring 01 can be compressed and vulcanized by the load applied by the actuating device 03, so that the sealing can be realized.
This application has strengthened the sealed effect between sealed rotating ring 05 and the sealed quiet ring 01 through connect sealed rubber ring 08 on sealed quiet ring 01, adopts vulcanization process to connect sealed rubber ring 08 in the rubber ring inslot simultaneously, makes sealed rubber ring 08 connect more stable, also can play the effect of the sealed effect of reinforcing equally.
Example 3
Referring to fig. 1-4, based on embodiment 1, the actuating device 03 of this embodiment includes an electric push rod, a mounting fixing seat 04 is connected to an engine case 06, one end of the electric push rod is connected to the mounting fixing seat 04, and the other end of the electric push rod is connected to a sealing movable ring 05.
The electric push rod is selected according to actual conditions, and small-sized products are selected by considering load, stroke and actuating speed at the same time so as to control the size and weight of the actuating device 03.
Example 4
Referring to fig. 1-4, based on embodiment 1, the sealing moving ring 05 of this embodiment adopts a multi-flap centrosymmetric structure on the circumference; the two ends of the arc surface 09 forming the sealing movable ring 05 are respectively provided with a tenon 11 and a mortise 10 which are in wedge fit.
The tenon 11 and the mortise 10 are in small interference fit, and sealant is coated on the interference fit surface.
When the movable sealing ring 05 is assembled, a proper amount of sealant is coated on the interference fit surface, so that the sealing reliability of the movable sealing ring 05 is ensured.
This application sets up wedge-shaped complex tenon 11 and tongue-and-groove 10 respectively at the arc surface 09 both ends that constitute sealed rotating ring 05, and the cooperation of tenon and tongue-and-groove 10 small overarching can realize the radial positioning between the bivalve symmetrical structure.
Example 5
Referring to fig. 1 to 4, according to embodiment 1, a threaded hole for connecting with an axial baffle 02 is provided on a front end surface of a seal moving ring 05 of this embodiment.
When the connecting bolt between the axial baffle 02 and the sealing movable ring 05 is installed, the uniform stress in the circumferential direction is ensured, and the mounting hole can be properly repaired when necessary, so that the electric push rod is prevented from generating excessive prestress.
Example 6
Referring to fig. 1 to 4, based on embodiment 1, when the stroke of the seal moving ring 05 of this embodiment is maximum, the distance between the conical surfaces of the seal moving ring 05 and the seal stationary ring 01 should be greater than the air bleeding requirement value.
If the distance between the conical surfaces of the movable sealing ring 05 and the static sealing ring 01 does not meet the requirement, the thickness of the mounting edge of the mounting fixed seat 04 or the axial baffle 02 can be adjusted by repairing.
Claims (8)
1. The air bleeding mechanism for the turbine engine is characterized by comprising a static sealing ring (01) which is integrally integrated on the outer side of an engine case (06), wherein the static sealing ring (01) is provided with an inclined angle slope, a plurality of air vents (07) are arranged on the inclined angle slope, and the air vents (07) avoid blades inside the engine case (06) and are uniformly distributed on the inclined angle slope; a sealing moving ring (05) is attached to the outer side of the sealing static ring (01), the axial end face of the inclined plane joint of the sealing static ring (01) and the sealing moving ring (05) is connected and locked through an axial baffle (02), and an actuating device (03) is connected to the axial baffle (02); and a sealing structure is connected between the sealing movable ring (05) and the sealing static ring (01).
2. The bleeding mechanism for a turbine engine as set forth in claim 1, wherein said sealing structure includes a rubber ring groove provided on an inclined surface of said stationary seal ring (01), a seal rubber ring (08) being attached in said rubber ring groove, said seal rubber ring (08) being fixed in said rubber ring groove by vulcanization.
3. The bleeding mechanism for the turbine engine as claimed in claim 1, wherein the actuating device (03) comprises an electric push rod, the engine case (06) is connected with a mounting fixing seat (04), one end of the electric push rod is connected with the mounting fixing seat (04), and the other end of the electric push rod is connected with a sealing movable ring (05).
4. An air bleeding mechanism for a turbine engine according to claim 1, characterized in that the sealing dynamic ring (05) is of a multi-lobed centrosymmetric structure on its circumference; two ends of the arc surface (09) forming the sealing movable ring (05) are respectively provided with a tenon (11) and a mortise (10) which are in wedge-shaped fit.
5. The bleeding mechanism for a turbine engine as claimed in claim 4, wherein the tongue (11) is in small interference fit with the groove (10), and a sealant is applied to the interference fit surface.
6. An air bleeding mechanism for a turbine engine according to claim 1, wherein the front end face of the seal moving ring (05) is provided with a threaded hole for connecting with the axial baffle (02).
7. An air bleeding mechanism for a turbine engine according to claim 1, characterized in that when the stroke of the seal moving ring (05) is maximum, the distance between the conical surfaces of the seal moving ring (05) and the seal static ring (01) is greater than the air bleeding requirement.
8. An air bleeding mechanism for a turbine engine according to any one of claims 1 to 7, characterized in that the air bleeding mechanism is mounted by: the mounting fixing seat (04) is fixedly connected with an engine case (06), the electric push rod is fixed on the mounting fixing seat (04), then the multi-segment arc-shaped blocks of the sealing movable ring (05) are axially attached to the outer side of the sealing static ring (01), then the electric push rod is axially pressed into the mortises (10) to be matched, the axial baffle (02) is attached to the front end face of the sealing movable ring (05) and is not temporarily fixed by mounting bolts, the axial baffle and the sealing movable ring move together after the attachment, the electric push rod is fixed to the axial baffle (02) after aligning with mounting holes of the axial baffle (02) and mounting bosses of the front end of the electric push rod, then the connecting bolts between the axial baffle (02) and the sealing movable ring (05) are mounted, and the circumferential uniform stress is guaranteed when the bolts are mounted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210786690.2A CN115013090B (en) | 2022-07-06 | 2022-07-06 | Air bleeding mechanism for turbine engine |
| PCT/CN2022/122551 WO2024007460A1 (en) | 2022-07-06 | 2022-10-14 | Air-bleed mechanism for turbine engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210786690.2A CN115013090B (en) | 2022-07-06 | 2022-07-06 | Air bleeding mechanism for turbine engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115013090A CN115013090A (en) | 2022-09-06 |
| CN115013090B true CN115013090B (en) | 2023-04-07 |
Family
ID=83079262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210786690.2A Active CN115013090B (en) | 2022-07-06 | 2022-07-06 | Air bleeding mechanism for turbine engine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115013090B (en) |
| WO (1) | WO2024007460A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013090B (en) * | 2022-07-06 | 2023-04-07 | 四川航天中天动力装备有限责任公司 | Air bleeding mechanism for turbine engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4827713A (en) * | 1987-06-29 | 1989-05-09 | United Technologies Corporation | Stator valve assembly for a rotary machine |
| EP0902179A2 (en) * | 1997-09-09 | 1999-03-17 | United Technologies Corporation | Bleed valve system |
| CN102829188A (en) * | 2012-09-19 | 2012-12-19 | 江苏华青流体科技有限公司 | Rear shaft seal device with integral moving ring |
| CN106523707A (en) * | 2016-11-01 | 2017-03-22 | 天津市合润科技有限责任公司 | Mechanical sealing device |
| CN206708086U (en) * | 2017-04-19 | 2017-12-05 | 北京航天普霖科技有限公司 | A kind of pump stuffing box seal structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2933127B1 (en) * | 2008-06-25 | 2015-04-24 | Snecma | DEVICE FOR COLLECTING AIR IN A TURBOMACHINE |
| CN114109646B (en) * | 2021-11-30 | 2022-11-18 | 四川航天中天动力装备有限责任公司 | Clamping ring type two-stage adjustable exhaust system, engine and aircraft |
| CN115013090B (en) * | 2022-07-06 | 2023-04-07 | 四川航天中天动力装备有限责任公司 | Air bleeding mechanism for turbine engine |
-
2022
- 2022-07-06 CN CN202210786690.2A patent/CN115013090B/en active Active
- 2022-10-14 WO PCT/CN2022/122551 patent/WO2024007460A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4827713A (en) * | 1987-06-29 | 1989-05-09 | United Technologies Corporation | Stator valve assembly for a rotary machine |
| EP0902179A2 (en) * | 1997-09-09 | 1999-03-17 | United Technologies Corporation | Bleed valve system |
| CN102829188A (en) * | 2012-09-19 | 2012-12-19 | 江苏华青流体科技有限公司 | Rear shaft seal device with integral moving ring |
| CN106523707A (en) * | 2016-11-01 | 2017-03-22 | 天津市合润科技有限责任公司 | Mechanical sealing device |
| CN206708086U (en) * | 2017-04-19 | 2017-12-05 | 北京航天普霖科技有限公司 | A kind of pump stuffing box seal structure |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024007460A1 (en) | 2024-01-11 |
| CN115013090A (en) | 2022-09-06 |
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