CN112412546B - Nozzle chamber of industrial steam turbine without median plane - Google Patents
Nozzle chamber of industrial steam turbine without median plane Download PDFInfo
- Publication number
- CN112412546B CN112412546B CN202011318578.3A CN202011318578A CN112412546B CN 112412546 B CN112412546 B CN 112412546B CN 202011318578 A CN202011318578 A CN 202011318578A CN 112412546 B CN112412546 B CN 112412546B
- Authority
- CN
- China
- Prior art keywords
- nozzle chamber
- main body
- chamber main
- steam turbine
- median plane
- Prior art date
- 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.)
- Active
Links
- 230000001105 regulatory effect Effects 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
Images
Classifications
-
- 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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/047—Nozzle boxes
-
- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
- F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention belongs to the technical field of industrial turbines, and particularly relates to a nozzle chamber of an industrial turbine without a median plane. The technical scheme is as follows: the nozzle chamber of the industrial steam turbine without the median plane comprises an integral nozzle chamber main body, wherein a plurality of steam chambers are arranged in the nozzle chamber main body, the steam chambers are communicated with a regulating valve seat mounting hole, and the regulating valve seat mounting hole is arranged on the nozzle chamber main body; and a hoisting accessory for supporting the nozzle chamber main body is arranged on the inner side of the nozzle chamber main body, and the hoisting accessory is sleeved on a rotor of the steam turbine. The invention provides a nozzle chamber of an industrial steam turbine without a median plane, which avoids the problems of air leakage of the median plane and larger transverse sizes of the nozzle chamber and an outer cylinder.
Description
Technical Field
The invention belongs to the technical field of industrial turbines, and particularly relates to a nozzle chamber of an industrial turbine without a median plane.
Background
For an industrial steam turbine, a large number of unit steam distribution modes adopt nozzle steam distribution, and key parts for realizing the nozzle steam distribution are a steam turbine nozzle group, namely a stationary blade part of an adjusting stage. The structure for installing the nozzle group is called as a nozzle chamber, the nozzle chamber is a pressure-bearing cylinder body in nature, the steam inlet position is matched with the regulating valve seat and receives the steam from each group of the regulating valve, and the steam outlet position is matched with each group of the nozzle and guides the steam into the nozzle group. The nozzle chamber of the steam turbine is a key part in the steam turbine, works in the steam inlet section of the steam turbine, has higher temperature and pressure, and puts higher requirements on the strength of the steam turbine.
As shown in fig. 4 and 5, in order to assemble the rotor, the conventional nozzle chamber has an upper half and a lower half, i.e., the nozzle chamber is composed of an upper half and a lower half, and the unit is assembled by first loading the lower half, then dropping the lower half into the rotor, and finally covering the upper half. The upper half and the lower half are connected together through a split bolt and a flange. In order to ensure that the steam in the upper half can smoothly enter the lower half, a sealing ring structure is also adopted at the communication position of the steam chambers in the upper half and the lower half. Conventional nozzle chamber structures, while capable of performing the intended function, also suffer from a number of deficiencies. Firstly, because of the arrangement of the middle section bolt, the transverse dimension of the nozzle chamber is larger, for a steam turbine cylinder enveloping a steam chamber, the transverse dimension of the steam turbine cylinder is correspondingly increased to ensure that the middle section bolt of the nozzle chamber does not interfere with the inner wall of the cylinder, and for the cylinder, under the condition of certain internal pressure, the increase of the transverse dimension means that the opening force of the upper half and the lower half is increased, the working stress of the middle section bolt is increased, and under the same condition, the design of the middle section bolt of the cylinder needs to increase the specification, and the design cost of the cylinder is increased. Secondly, the existence of the nozzle chamber split surface, because the self working state of the nozzle chamber is more complicated, in order to ensure the split surface sealing performance, the design difficulty of the flange and the bolt is higher, and the bolt cost and the processing cost of the corresponding screw hole are also increased. Thirdly, in order to ensure that the middle section of the nozzle chamber is not steam-tight, the communicating part of the upper half and the lower half is also provided with a sealing ring structure, the middle section sealing ring structure is complex to process, high in cost and troublesome to install, a special assembly process is required, and the cost of the nozzle chamber is increased.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide an industrial steam turbine nozzle chamber without a median plane, which avoids the problems of air leakage of the median plane and large transverse sizes of the nozzle chamber and an outer cylinder.
The technical scheme adopted by the invention is as follows:
the nozzle chamber of the industrial steam turbine without the median plane comprises an integral nozzle chamber main body, wherein a plurality of steam chambers are arranged in the nozzle chamber main body, the steam chambers are communicated with a regulating valve seat mounting hole, and the regulating valve seat mounting hole is arranged on the nozzle chamber main body; and a hoisting accessory for supporting the nozzle chamber main body is arranged on the inner side of the nozzle chamber main body, and the hoisting accessory is sleeved on a rotor of the steam turbine.
The upper half and the lower half of the conventional nozzle chamber are cast into a whole, and each steam inlet chamber is separated by the middle spacing rib and respectively corresponds to each group of regulating valves and each group of nozzles. The invention is provided with a special hoisting accessory for assembling and hoisting, and the hoisting accessory can relatively fix the rotor and the nozzle chamber main body. When the machine is assembled, the nozzle chamber body is firstly penetrated from the head part of the rotor until the nozzle chamber body reaches the set position of the rotor. Then, the hoisting accessory is assembled between the rotor and the nozzle chamber main body, the rotor is hoisted, the nozzle chamber main body and the rotor are hoisted simultaneously under the support of the hoisting accessory, and the nozzle chamber main body and the rotor are integrally placed into the cylinder, so that the assembly of the nozzle chamber main body and the rotor is completed.
The invention avoids the steam leakage at the horizontal middle split surface after the middle split surface is cancelled. And because no middle facet is arranged, a middle facet flange, a middle facet bolt and a middle facet sealing ring are not needed, the structure of the nozzle chamber is simpler, the transverse sizes of the nozzle chamber and the outer cylinder are reduced, and the manufacturing and processing cost is reduced.
As a preferable scheme of the present invention, the outer side of the lifting accessory is provided with a supporting step, the inner side of the nozzle chamber main body is provided with a positioning step, and the supporting step is fastened with the positioning step. Before the rotor is hoisted, the hoisting accessory is sleeved on the rotor and is moved to the position buckled with the nozzle chamber main body, and then the hoisting accessory plays a supporting role on the nozzle chamber main body. The nozzle chamber main body can not move on the rotor when the rotor is lifted, and after the rotor is installed in the outer cylinder, the nozzle chamber main body is installed at a determined position between the outer cylinder and the rotor.
As a preferable aspect of the present invention, the inner side of the lifting attachment is attached to the rotor by a screw. The accuracy of the nozzle chamber position is further ensured by connecting the lifting attachment to the rotor by means of screws.
As a preferable aspect of the present invention, the nozzle chamber main body is provided with a plurality of positioning structures. The positioning structure can position the nozzle chamber main body, and the position of the nozzle chamber main body in the outer cylinder is accurate.
As a preferable scheme of the invention, the plurality of positioning structures are respectively arranged on the annular surface of the nozzle chamber main body, the horizontal direction of the side surface and the vertical direction of the side surface. The positioning structure in the vertical direction of the side face of the nozzle chamber main body can perform positioning in the vertical direction on the nozzle chamber main body, the positioning structure in the horizontal direction of the side face of the nozzle chamber main body can perform axial positioning on the nozzle chamber main body, and the positioning structure on the annular face of the nozzle chamber main body can perform transverse positioning on the nozzle chamber main body.
As a preferable aspect of the present invention, the number of the regulating valve seat mounting holes and the number of the steam chambers are four, and the four regulating valve seat mounting holes are arranged in parallel at the upper end of the nozzle chamber main body. Each regulating valve seat mounting hole corresponds to one steam chamber, each steam chamber corresponds to each group of nozzles respectively, and steam enters the nozzles from the steam chambers to do work.
The invention has the beneficial effects that:
1. the invention casts the upper half and the lower half of the conventional nozzle chamber into a whole, and is provided with a special hoisting accessory for assembling and hoisting, and the hoisting accessory can relatively fix the rotor and the nozzle chamber main body. Therefore, when the rotor is installed in the outer cylinder, the nozzle chamber can be positioned, and the problem that the rotor and the nozzle chamber cannot move together due to the gap between the rotor and the nozzle chamber is solved.
2. The invention avoids the steam leakage at the horizontal middle split surface after the middle split surface is cancelled.
3. Because no middle split surface is arranged, a middle split surface flange, a middle split surface bolt and a middle split surface sealing ring are not needed any more, the structure of the nozzle chamber becomes simpler, the transverse sizes of the nozzle chamber and the outer cylinder are reduced, and the manufacturing and processing cost is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a perspective view of the present invention in combination with a rotor;
FIG. 4 is a schematic view of a prior art nozzle chamber configuration;
fig. 5 is a cross-sectional view of a prior art nozzle chamber.
In the figures, 1-nozzle chamber body; 2-hoisting accessories; 3-a positioning structure; 11-a steam chamber; 12-a regulating valve seat mounting hole; 13-positioning the step; 21-supporting the step.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 4, the nozzle chamber of the industrial steam turbine without the median plane of the embodiment includes an integral nozzle chamber main body 1, a plurality of steam chambers 11 are provided in the nozzle chamber main body 1, the steam chambers 11 are communicated with a regulating valve seat mounting hole 12, and the regulating valve seat mounting hole 12 is provided on the nozzle chamber main body 1; the inner side of the nozzle chamber main body 1 is provided with a hoisting accessory 2 used for supporting the nozzle chamber main body 1, and the hoisting accessory 2 is sleeved on a rotor of the steam turbine.
The upper half and the lower half of the conventional nozzle chamber are cast into a whole, and each steam inlet chamber is separated by the middle spacing rib and respectively corresponds to each group of regulating valves and each group of nozzles. The invention is provided with a special hoisting accessory 2 for assembling and hoisting, and the hoisting accessory 2 can relatively fix the rotor and the nozzle chamber main body 1. When assembling, the nozzle chamber body 1 is inserted from the head of the rotor until the nozzle chamber body 1 reaches the predetermined position of the rotor. Then, the hoisting accessory 2 is assembled between the rotor and the nozzle chamber main body 1 to hoist the rotor, the nozzle chamber main body 1 and the rotor are hoisted simultaneously under the support of the hoisting accessory 2, and the nozzle chamber main body 1 and the rotor are integrally placed in a cylinder, namely the assembly of the nozzle chamber main body 1 and the rotor is completed.
The invention avoids the steam leakage at the horizontal middle split surface after the middle split surface is cancelled. And because no middle facet is arranged, a middle facet flange, a middle facet bolt and a middle facet sealing ring are not needed, the structure of the nozzle chamber is simpler, the transverse sizes of the nozzle chamber and the outer cylinder are reduced, and the manufacturing and processing cost is reduced.
In order to ensure the accurate connection among the rotor, the hoisting accessory 2 and the nozzle chamber main body 1, a supporting step 21 is arranged on the outer side of the hoisting accessory 2, a positioning step 13 is arranged on the inner side of the nozzle chamber main body 1, and the supporting step 21 is buckled with the positioning step 13. Before the rotor is hoisted, the hoisting accessory 2 is sleeved on the rotor, and the hoisting accessory 2 is moved to the position buckled with the nozzle chamber main body 1, so that the hoisting accessory 2 supports the nozzle chamber main body 1. The nozzle chamber main body 1 can not move on the rotor when the rotor is lifted, and after the rotor is installed in the outer cylinder, the nozzle chamber main body 1 is installed at a determined position between the outer cylinder and the rotor. The inner side of the hoisting accessory 2 is connected to the rotor through screws. The accuracy of the nozzle chamber position is further ensured by attaching the lifting attachment 2 to the rotor by means of screws.
In order to ensure that the nozzle chamber body 1 is accurately positioned in the outer cylinder, a plurality of positioning structures 3 are arranged on the nozzle chamber body 1. The positioning structure 3 can position the nozzle chamber main body 1, and the position of the nozzle chamber main body 1 in the outer cylinder is ensured to be accurate. The positioning structures 3 are respectively arranged on the ring surface of the nozzle chamber main body 1, the horizontal direction of the side surface and the vertical direction of the side surface. The positioning structure 3 in the vertical direction of the side surface of the nozzle chamber main body 1 can perform vertical positioning on the nozzle chamber main body 1, the positioning structure 3 in the horizontal direction of the side surface of the nozzle chamber main body 1 can perform axial positioning on the nozzle chamber main body 1, and the positioning structure 3 on the annular surface of the nozzle chamber main body 1 can perform transverse positioning on the nozzle chamber main body 1.
In this embodiment, the number of the regulating valve seat mounting holes 12 and the number of the steam chambers 11 are four, and the four regulating valve seat mounting holes 12 are arranged in parallel at the upper end of the nozzle chamber main body 1. Each regulating valve seat mounting hole 12 corresponds to one steam chamber 11, each steam chamber 11 corresponds to each group of nozzles, and steam enters the nozzles from the steam chambers 11 to do work.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (6)
1. The industrial steam turbine nozzle chamber without the median plane is characterized by comprising an integral nozzle chamber main body (1), wherein a plurality of steam chambers (11) are arranged in the nozzle chamber main body (1), the steam chambers (11) are communicated with a regulating valve seat mounting hole (12), and the regulating valve seat mounting hole (12) is arranged on the nozzle chamber main body (1); the inner side of the nozzle chamber main body (1) is provided with a hoisting accessory (2) used for supporting the nozzle chamber main body (1), and the hoisting accessory (2) is sleeved on a rotor of the steam turbine.
2. The industrial steam turbine nozzle chamber without the median plane according to claim 1, characterized in that the outer side of the hoisting accessory (2) is provided with a supporting step (21), the inner side of the nozzle chamber main body (1) is provided with a positioning step (13), and the supporting step (21) is buckled with the positioning step (13).
3. The industrial steam turbine nozzle chamber without median plane according to claim 1, characterized in that the inner side of said lifting appendage (2) is connected to the rotor by means of screws.
4. The industrial steam turbine nozzle house without midportion according to claim 1, wherein the nozzle house body (1) is provided with a plurality of locating structures (3).
5. The industrial steam turbine nozzle room without median plane according to claim 4, wherein a plurality of positioning structures (3) are respectively provided on the annular surface of the nozzle room body (1), the horizontal direction of the side surface and the vertical direction of the side surface.
6. The industrial steam turbine nozzle room without median plane according to any of claims 1 to 5, wherein the number of the regulating valve seat mounting holes (12) and the steam chamber (11) is four, and four regulating valve seat mounting holes (12) are arranged side by side at the upper end of the nozzle room main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011318578.3A CN112412546B (en) | 2020-11-23 | 2020-11-23 | Nozzle chamber of industrial steam turbine without median plane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011318578.3A CN112412546B (en) | 2020-11-23 | 2020-11-23 | Nozzle chamber of industrial steam turbine without median plane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112412546A CN112412546A (en) | 2021-02-26 |
| CN112412546B true CN112412546B (en) | 2022-01-11 |
Family
ID=74777308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011318578.3A Active CN112412546B (en) | 2020-11-23 | 2020-11-23 | Nozzle chamber of industrial steam turbine without median plane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112412546B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107606B (en) * | 2021-05-10 | 2023-03-24 | 哈尔滨汽轮机厂有限责任公司 | Thermodynamic calculation and design algorithm for transverse stage of steam turbine |
| CN115370432A (en) * | 2022-07-11 | 2022-11-22 | 哈尔滨广瀚新能动力有限公司 | Rotor and nozzle chamber and inner cylinder sleeving structure of backpressure steam turbine |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1500789A1 (en) * | 1998-03-03 | 2005-01-26 | Mitsubishi Heavy Industries, Ltd. | Impingement cooled ring segment of a gas turbine |
| AU2005242168A1 (en) * | 1997-07-15 | 2006-01-05 | Zamtec Limited | Ink jet nozzle with slotted sidewall and moveable vane |
| CN2893159Y (en) * | 2006-04-30 | 2007-04-25 | 靖远第二发电有限公司 | Improvement of Chinese-made improved 300 megawatt turbine regulating stage nozzle |
| CN101215977A (en) * | 2007-12-29 | 2008-07-09 | 东方电气集团东方汽轮机有限公司 | Steam turbine nozzle set and its machining process |
| CN202081918U (en) * | 2011-05-18 | 2011-12-21 | 北京龙威发电技术有限公司 | Nozzle for 600MW steam turbine |
| CN103046974A (en) * | 2012-12-20 | 2013-04-17 | 东方电气集团东方汽轮机有限公司 | High-pressure cylinder of ultra-supercritical steam turbine set |
| CN204729135U (en) * | 2015-06-04 | 2015-10-28 | 北京北重汽轮电机有限责任公司 | A kind of nozzle box's device of steam turbine and steam turbine |
| CN106437871A (en) * | 2016-11-10 | 2017-02-22 | 中国船舶重工集团公司第七0三研究所 | Overall complete-cycle nozzle chamber of high back pressure turbine |
| CN108204252A (en) * | 2016-12-20 | 2018-06-26 | 上海电气电站设备有限公司 | The cylinder of steam turbine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011080754A2 (en) * | 2009-12-29 | 2011-07-07 | Indian Oil Corporation Ltd. | A feed nozzle assembly |
-
2020
- 2020-11-23 CN CN202011318578.3A patent/CN112412546B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2005242168A1 (en) * | 1997-07-15 | 2006-01-05 | Zamtec Limited | Ink jet nozzle with slotted sidewall and moveable vane |
| EP1500789A1 (en) * | 1998-03-03 | 2005-01-26 | Mitsubishi Heavy Industries, Ltd. | Impingement cooled ring segment of a gas turbine |
| CN2893159Y (en) * | 2006-04-30 | 2007-04-25 | 靖远第二发电有限公司 | Improvement of Chinese-made improved 300 megawatt turbine regulating stage nozzle |
| CN101215977A (en) * | 2007-12-29 | 2008-07-09 | 东方电气集团东方汽轮机有限公司 | Steam turbine nozzle set and its machining process |
| CN202081918U (en) * | 2011-05-18 | 2011-12-21 | 北京龙威发电技术有限公司 | Nozzle for 600MW steam turbine |
| CN103046974A (en) * | 2012-12-20 | 2013-04-17 | 东方电气集团东方汽轮机有限公司 | High-pressure cylinder of ultra-supercritical steam turbine set |
| CN204729135U (en) * | 2015-06-04 | 2015-10-28 | 北京北重汽轮电机有限责任公司 | A kind of nozzle box's device of steam turbine and steam turbine |
| CN106437871A (en) * | 2016-11-10 | 2017-02-22 | 中国船舶重工集团公司第七0三研究所 | Overall complete-cycle nozzle chamber of high back pressure turbine |
| CN108204252A (en) * | 2016-12-20 | 2018-06-26 | 上海电气电站设备有限公司 | The cylinder of steam turbine |
Non-Patent Citations (3)
| Title |
|---|
| 一种汽轮机喷嘴室特殊结构T型槽加工方法;季东军等;《机械工程师》;20150610;全文 * |
| 东方1000MW超超临界汽轮机设计特点及运行业绩;王为民等;《东方电气评论》;20090325;全文 * |
| 汽轮发电机的安装与调试研究;师富见;《科技创新与应用》;20130508;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112412546A (en) | 2021-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1793096B1 (en) | Apparatus for assembling a gas turbine engine | |
| CN112412546B (en) | Nozzle chamber of industrial steam turbine without median plane | |
| CA2560561C (en) | Methods and apparatuses for assembling a gas turbine engine | |
| CA2568818C (en) | Methods and apparatuses for assembling a gas turbine engine | |
| CN106121746A (en) | Compound diverter lip for axial flow turbine machinery compressor | |
| US20080199312A1 (en) | Guide vane arrangement of a turbomachine | |
| CN118391298B (en) | Low-pressure compressor outlet dual-sealing structure with counterweight | |
| CN113464285A (en) | Built-in double-oil-way fuel header pipe mounting structure | |
| CN216895057U (en) | Compressor stator composite structure | |
| CN113154456B (en) | Head structure of casing of backflow combustion chamber, manufacturing method of head structure and engine combustion chamber | |
| CN218177292U (en) | Temperature and pressure reducing bypass valve for steam turbine and steam turbine set | |
| CN217841841U (en) | Cylinder head for aviation piston engine | |
| CN219967187U (en) | Clamp for adjusting coaxiality of casing | |
| CN213711419U (en) | A impeller and axial fan that is used for axial fan's wheel hub and adopts it | |
| CN216518253U (en) | Lower shell of thermostat | |
| CN222121652U (en) | Integrated air supply module and rocket engine system | |
| CN221443445U (en) | Supporting plate assembly for self-closing valve | |
| US11614000B1 (en) | Turbocharger systems and methods | |
| CN220883368U (en) | Blowing device of core rod group in hollow forming machine | |
| CN218326083U (en) | Split type phase external gear component for aviation rotor engine | |
| CN213928548U (en) | V-shaped clamping ring integrated with supporting and mounting flange | |
| CN215863524U (en) | Oil inlet structure of fuel nozzle and fuel nozzle comprising same | |
| CN219932987U (en) | Pneumatic multistage sleeve regulating valve | |
| CN119778317A (en) | Diffuser case and aircraft engine | |
| CN209324431U (en) | Turbine spindle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |