CN102808785A - Secondary high-speed centrifugal compressor - Google Patents
Secondary high-speed centrifugal compressor Download PDFInfo
- Publication number
- CN102808785A CN102808785A CN2012102513258A CN201210251325A CN102808785A CN 102808785 A CN102808785 A CN 102808785A CN 2012102513258 A CN2012102513258 A CN 2012102513258A CN 201210251325 A CN201210251325 A CN 201210251325A CN 102808785 A CN102808785 A CN 102808785A
- Authority
- CN
- China
- Prior art keywords
- level
- order
- impeller
- volute
- inlet guide
- 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.)
- Pending
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a secondary high-speed centrifugal compressor, which comprises a motor, a gear box, volutes, impellers, inlet guide vanes, an inlet guide vane regulating mechanism, outlet guide vanes, an outlet guide vane regulating mechanism, an intermediate cooler and a transmission mechanism, wherein the volutes are arranged on flanges on two sides of the gear box; the impellers are fixed at two ends of a gear shaft by using bolts; the inlet guide vanes are arranged in rail shaft holes at air inlet ends of the volutes; the outlet guide vanes are arranged in the corresponding shaft holes in the flanges of the gear box; the motor is connected with a low-speed shaft through a coupler; and a driving gear is connected with the low-speed shaft through a key and meshed with the gear shaft. The secondary high-speed centrifugal compressor is high in efficiency, wide in stable working condition range, reasonable and compact in structure and low in manufacturing cost, and the flow can be randomly regulated in a range of 40 percent to 100 percent of rated flow.
Description
Technical field
The present invention relates to a kind of secondary high-speed centrifugal compressor, specifically be equipped with and have more a kind of secondary high-speed centrifugal compressor of high efficiency and wideer flow adjustment range behind the adjustable import and export stator, belong to the mechanical structure technical field.
Background technique
Secondary high-speed centrifugal compressor is to be in series by low pressure stage compressor and high pressure stage compressor; Compare with single-stage radial compressor, pressure ratio is higher, can reach more than 3.5; Overall performance curve is steeper than the curve of single-stage radial compressor, and the steady working condition scope also reduces thereupon.
In the prior art, the impeller aspect, the impeller that uses on the domestic like product is common 3 d impeller, and impeller has only primary blades not divide blade, and energy loss is relatively large, and efficient is on the low side.
Stator adjustable aspect, it is adjustable that this series products has only inlet guide vane, and exit guide blade is fixed, flow adjustment range generally is the 70%-100% of rated flow, the steady working condition scope is narrow partially.
And aspect driving mechanism, this series products is general to adopt three the target of arrangement (i.e. a power input shaft, two ptos) to realize that two impellers of a driven by motor rotate.And such scheme makes that the gear-box volume is huge, complex structure, and product cost is high.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, thereby a kind of secondary high-speed centrifugal compressor is provided, its efficient is higher, and steady working condition is wider, can be in the 40%-100% of rated flow scope regulated at will, compactness rational in infrastructure, low cost of manufacture.
According to scheme provided by the invention, secondary high-speed centrifugal compressor comprises motor, gear-box, volute, impeller, inlet guide vane, inlet guide vane controlling mechanism, exit guide blade, exit guide blade controlling mechanism, interstage cooler and driving mechanism; Characteristic is:
Said volute comprises first order volute and second level volute, and said first order volute and second level volute are installed in respectively on the flange of gear-box both sides; The import of said interstage cooler connects with the outlet of second level volute through air conduit; The outlet of said interstage cooler connects with the import of first order volute through air conduit;
Said impeller comprises first order impeller and second level impeller, and said first order impeller and second level impeller are fixed on the two ends of gear shaft respectively with the bolt symmetry;
Said inlet guide vane comprises first order inlet guide vane; Second level inlet guide vane, said first order inlet guide vane, second level inlet guide vane adopts several respectively; Several first order inlet guide vanes are installed in the radially axis hole of air intake of first order volute, and radially are being the state of being uniformly distributed with; Several second level inlet guide vanes are installed in the radially axis hole of air intake of second level volute, and radially are being the state of being uniformly distributed with;
Said exit guide blade comprises first order exit guide blade and second level exit guide blade; Said first order exit guide blade and second level exit guide blade adopt several respectively; Several first order exit guide blades are installed in the corresponding axis hole on the flange of gear-box one end, and radially are being the state of being uniformly distributed with; Several second level exit guide blades are installed in the corresponding axis hole on the flange of the gear-box the other end, and radially are being the state of being uniformly distributed with;
Said driving mechanism comprises motor, gear-box, lower velocity shaft, driving gear, gear shaft; Lower velocity shaft, gear shaft are fixed in the gear-box by bearings respectively; Said motor connects through coupling with lower velocity shaft, and said driving gear and lower velocity shaft pass through key connecting, and meshes with gear shaft.
As further improvement of the present invention, said first order inlet guide vane is adjustable, and the inlet guide vane controlling mechanism is connected on the axle of first order inlet guide vane; Said first order exit guide blade is weldingly fixed on the first order volute; Said second level inlet guide vane is weldingly fixed on the volute of the second level.
As further improvement of the present invention, said second level exit guide blade is adjustable, and the exit guide blade controlling mechanism is connected on the axle of second level exit guide blade; The first order inlet guide vane of said first order compressor and second level exit guide blade adopt interlock to regulate.
Said first order impeller is respectively equipped with 6-12 primary blades on the impeller of the second level, be provided with a branch blade in the middle of every two adjacent primary blades.
As further improvement of the present invention, said first order impeller, second level impeller adopt complete efficiently 3 d impeller respectively, and adopt aluminum alloy material to process.
As further improvement of the present invention, said first order inlet guide vane, second level inlet guide vane adopt 11-19 respectively.
As further improvement of the present invention, said first order exit guide blade and second level exit guide blade adopt 9-19 respectively.
As further improvement of the present invention, be provided with impeller cavity in the said impeller; Be provided with the spiral case runner in the said spiral case.
Compared with present technology the present invention has the following advantages:
Aspect impeller, both stage impellers first order impeller, second level impeller have all adopted complete efficiently 3 d impeller, and are processed by the little aluminum alloy of quality, and efficient is further enhanced.Aspect the stator adjusting; First order entry guide vane and second level exit guide blade can be regulated according to different working conditions; Select optimal angle, effectively reduce air flow resistance and flow losses, the present invention is connected regulate still can keep higher efficient in the 40%-100% of rated flow scope; Effectively overcome the shortcoming of secondary centrifugal compressor steady working condition narrow range, to adapt to the traffic demand under the different operating modes.The driving mechanism aspect adopts diaxon arrangement (input shaft, an output shaft), first order exit guide blade, and second level exit guide blade is distributed in the two ends of a rooted tooth wheel shaft, can make structure compact more, rationally, reduces product cost.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Following the present invention will combine accompanying drawing to further describe:
As shown in Figure 1: secondary high-speed centrifugal compressor comprises motor 1, gear-box 2, volute (first order volute 3a; Second level volute 3b), impeller (first order impeller 4a; Second level impeller 4b), inlet guide vane (first order inlet guide vane 5a; Second level inlet guide vane 5b), inlet guide vane controlling mechanism 6, exit guide blade (first order exit guide blade 7a, second level exit guide blade 7b), exit guide blade controlling mechanism 8, interstage cooler 9 and driving mechanism (lower velocity shaft 10, driving gear 11 and gear shaft 12) etc.
Said volute comprises first order volute 3a and second level volute 3b, and said first order volute 3a and second level volute 3b are installed in respectively on the flange of gear-box 2 both sides.The import of said interstage cooler 9 connects with the outlet of second level volute 3a through air conduit.The outlet of said interstage cooler 9 connects with the import of first order volute 3b through air conduit.
Said impeller comprises first order impeller 4a and second level impeller 4b, and said first order impeller 4a is respectively equipped with 6-12 primary blades on the impeller 4b of the second level, is provided with a branch blade in the middle of every two adjacent primary blades.
Said inlet guide vane comprises first order inlet guide vane 5a; Second level inlet guide vane 5b; Said first order inlet guide vane 5a, second level inlet guide vane 5b adopts several respectively, is generally 11-19; 11-19 first order inlet guide vane 5a is installed in the radially axis hole of air intake of first order volute 3a, and radially is being the state of being uniformly distributed with.11-19 second level inlet guide vane 5b is installed in the radially axis hole of air intake of second level volute 3b, and radially is being the state of being uniformly distributed with.
Said exit guide blade comprises first order exit guide blade 7a and second level exit guide blade 7b; Said first order exit guide blade 7a and second level exit guide blade 7b adopt several respectively; Be generally 9-19; 9-19 first order exit guide blade 7a is installed in the corresponding axis hole on the flange of gear-box 2 one ends, and radially is being the state of being uniformly distributed with.9-19 second level exit guide blade 7b is installed in the corresponding axis hole on the flange of gear-box 2 the other ends, and radially is being the state of being uniformly distributed with.
Said first order inlet guide vane 5a is adjustable, and inlet guide vane controlling mechanism 6 is connected on the axle of first order inlet guide vane 5a.Said first order exit guide blade 7a adopts and is weldingly fixed on the first order volute 3a.Said second level inlet guide vane 5b adopts and is weldingly fixed on the volute 3b of the second level.Said second level exit guide blade 7b is adjustable, and exit guide blade controlling mechanism 8 is connected on the axle of second level exit guide blade 7b.The first order inlet guide vane 5a of said first order compressor and second level exit guide blade 7b adopt interlock to regulate.
Said inlet guide vane controlling mechanism 6 and exit guide blade controlling mechanism 8 structures are identical, and it has applied for patent of invention, and name is called diffusion guide vane synchronous adjusting mechanism of high-speed centrifugal fan, patent No. ZL200910222658.7.It mainly is made up of rotating disk, pivoted arm, axle sleeve; Pivoted arm and guide vane teunnion are fixedly connected, and form revolute pair with axle sleeve, and the sliding-groove on axle sleeve and the rotating disk forms sliding pair; When dial rotation; Axle sleeve slides in the rotating disk sliding-groove, makes pivoted arm around the guide vane teunnion rotational, thus realize to stator adjusting.
Said driving mechanism comprises motor 1, lower velocity shaft 10, driving gear 11, gear shaft 12, and said motor 1 and lower velocity shaft 10 connect through coupling, and said driving gear 11 and lower velocity shaft 10 be through key connecting, and with gear shaft 12 engagements.Said first order impeller 4a and second level impeller 4b are fixed on the two ends of gear shaft 12 respectively with the bolt symmetry.
When secondary centrifugal compressor of the present invention was worked, motor 1 drove first order impeller 4a and second level impeller 4b through gear-box 2 speedups.Gas at first gets into first order compressor along arrow A direction among Fig. 1, and behind first order inlet guide vane 5a, generation is prewhirled; Flow into then in the impeller cavity 4a-1, air receives centrifugal force and the mobile effect of diffusion, and pressure and speed all are improved; After gas flows out from impeller, has very high flowing velocity, during through first order exit guide blade 7a; Flow area increases, and gas slows down, and pressure improves.Air gets in the spiral case runner 3a-1 afterwards, leaves first order compressor after compiling.After air-flow compressed through one-level, temperature significantly improved, and through after the cooling of interstage cooler 9, flowed into high stage compressor, carried out secondary compression.Leave high stage compressor along arrow B direction among Fig. 1 at last, get into air conduit.
Claims (9)
1. secondary high-speed centrifugal compressor comprises motor (1), gear-box (2), volute, impeller, inlet guide vane, inlet guide vane controlling mechanism (6), exit guide blade, exit guide blade controlling mechanism (8), interstage cooler (9) and driving mechanism; It is characterized in that:
Said volute comprises first order volute (3a) and second level volute (3b), and said first order volute (3a) is installed in respectively on the flange of gear-box (2) both sides with second level volute (3b); The import of said interstage cooler (9) connects with the outlet of second level volute (3a) through air conduit; The outlet of said interstage cooler (9) connects with the import of first order volute (3b) through air conduit;
Said impeller comprises first order impeller (4a) and second level impeller (4b), and said first order impeller (4a) and second level impeller (4b) are fixed on the two ends of gear shaft (12) respectively with the bolt symmetry;
Said inlet guide vane comprises first order inlet guide vane (5a); Second level inlet guide vane (5b); Said first order inlet guide vane (5a), second level inlet guide vane (5b) adopt several respectively; Several first order inlet guide vanes (5a) are installed in the radially axis hole of air intake of first order volute (3a), and radially are being the state of being uniformly distributed with; Several second level inlet guide vanes (5b) are installed in the radially axis hole of air intake of second level volute (3b), and radially are being the state of being uniformly distributed with;
Said exit guide blade comprises first order exit guide blade (7a) and second level exit guide blade (7b); Said first order exit guide blade (7a) and second level exit guide blade (7b) adopt several respectively; Several first order exit guide blades (7a) are installed in the corresponding axis hole on the flange of gear-box (2) one ends, and radially are being the state of being uniformly distributed with; Several second level exit guide blades (7b) are installed in the corresponding axis hole on the flange of gear-box (2) the other end, and radially are being the state of being uniformly distributed with;
Said driving mechanism comprises motor (1), gear-box (2), lower velocity shaft (10), driving gear (11), gear shaft (12); Lower velocity shaft (10), gear shaft (12) are fixed in the gear-box (2) by bearings respectively; Said motor (1) connects through coupling with lower velocity shaft (10); Said driving gear (11) passes through key connecting with lower velocity shaft (10), and meshes with gear shaft (12).
2. secondary high-speed centrifugal compressor as claimed in claim 1 is characterized in that: said first order inlet guide vane (5a) is adjustable, and inlet guide vane controlling mechanism (6) is connected on the axle of first order inlet guide vane (5a); Said first order exit guide blade (7a) is weldingly fixed on the first order volute (3a); Said second level inlet guide vane (5b) is weldingly fixed on the volute 3b of the second level.
3. secondary high-speed centrifugal compressor as claimed in claim 1 is characterized in that: said second level exit guide blade (7b) is adjustable, and exit guide blade controlling mechanism (8) is connected on the axle of second level exit guide blade (7b); Said first order inlet guide vane (5a) and second level exit guide blade (7b) adopt interlock to regulate.
4. secondary high-speed centrifugal compressor as claimed in claim 1 is characterized in that: be respectively equipped with 6-12 primary blades on said first order impeller (4a) and the second level impeller (4b), be provided with a branch blade in the middle of every two adjacent primary blades.
5. secondary high-speed centrifugal compressor as claimed in claim 1 is characterized in that: said first order impeller (4a) and second level impeller (4b) adopt full 3 d impeller respectively, and adopt aluminum alloy material to process.
6. secondary high-speed centrifugal compressor as claimed in claim 1 is characterized in that: said first order inlet guide vane (5a) and second level inlet guide vane 5b adopt 11-19 respectively.
7. secondary high-speed centrifugal compressor as claimed in claim 1 is characterized in that: said first order exit guide blade (7a) and second level exit guide blade (7b) adopt 9-19 respectively.
8. secondary high-speed centrifugal compressor as claimed in claim 1 is characterized in that: be provided with impeller cavity (4a-1) in the said impeller.
9. secondary high-speed centrifugal compressor as claimed in claim 1 is characterized in that: be provided with spiral case runner (3a-1) in the said spiral case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102513258A CN102808785A (en) | 2012-07-19 | 2012-07-19 | Secondary high-speed centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102513258A CN102808785A (en) | 2012-07-19 | 2012-07-19 | Secondary high-speed centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102808785A true CN102808785A (en) | 2012-12-05 |
Family
ID=47232606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102513258A Pending CN102808785A (en) | 2012-07-19 | 2012-07-19 | Secondary high-speed centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102808785A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362863A (en) * | 2013-08-02 | 2013-10-23 | 无锡杰尔压缩机有限公司 | Centrifugal vapor compressor |
| CN104061172A (en) * | 2013-03-20 | 2014-09-24 | 上海宝钢工业技术服务有限公司 | Atomizing air blower |
| CN108713100A (en) * | 2016-03-11 | 2018-10-26 | 大金应用美国股份有限公司 | Centrifugal compressor with the recycling of adjustable entrance |
| CN110374892A (en) * | 2019-07-09 | 2019-10-25 | 中国航发哈尔滨东安发动机有限公司 | A kind of centrifugal two-stage air compressor of high-speed direct-drive |
| CN110454439A (en) * | 2019-09-24 | 2019-11-15 | 重庆通用工业(集团)有限责任公司 | A kind of spiral case |
| WO2022111411A1 (en) * | 2020-11-24 | 2022-06-02 | 青岛海尔智能技术研发有限公司 | Centrifugal compressor |
| CN116378977A (en) * | 2023-04-06 | 2023-07-04 | 山东众海机械有限公司 | Magnetic suspension centrifugal air compressor secondary compression system |
| WO2024066423A1 (en) * | 2022-09-28 | 2024-04-04 | 哈电发电设备国家工程研究中心有限公司 | 15 mw transcritical carbon dioxide centrifugal compressor |
| CN110454439B (en) * | 2019-09-24 | 2024-06-07 | 重庆通用工业(集团)有限责任公司 | Volute casing |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6039534A (en) * | 1998-09-21 | 2000-03-21 | Northern Research And Engineering Corp | Inlet guide vane assembly |
| US6050780A (en) * | 1995-10-25 | 2000-04-18 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Method for driving a high speed compressor |
| US6234749B1 (en) * | 1998-08-21 | 2001-05-22 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Centrifugal compressor |
| CN201696311U (en) * | 2010-05-27 | 2011-01-05 | 河南众力空分设备有限公司 | Centrifugal compressor with variable inlet guide vane and rotatable vane diffuser |
| CN101952601A (en) * | 2008-02-20 | 2011-01-19 | 特灵国际有限公司 | Centrifugal compressor assembly and method |
| CN201916218U (en) * | 2010-12-30 | 2011-08-03 | 沈阳鼓风机集团股份有限公司 | Gear type air compressor for PTA (pure terephthalic acid) device |
| CN102261344A (en) * | 2011-08-31 | 2011-11-30 | 无锡杰尔压缩机有限公司 | Synchronous regulating device of high-speed centrifugal fan outlet guide vane |
| CN202209314U (en) * | 2011-08-19 | 2012-05-02 | 无锡杰尔压缩机有限公司 | Efficient energy-saving single-stage high-speed centrifugal blower |
| CN202746223U (en) * | 2012-07-19 | 2013-02-20 | 无锡杰尔压缩机有限公司 | Two-stage high-speed centrifugal compressor |
-
2012
- 2012-07-19 CN CN2012102513258A patent/CN102808785A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6050780A (en) * | 1995-10-25 | 2000-04-18 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Method for driving a high speed compressor |
| US6234749B1 (en) * | 1998-08-21 | 2001-05-22 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Centrifugal compressor |
| US6039534A (en) * | 1998-09-21 | 2000-03-21 | Northern Research And Engineering Corp | Inlet guide vane assembly |
| CN101952601A (en) * | 2008-02-20 | 2011-01-19 | 特灵国际有限公司 | Centrifugal compressor assembly and method |
| CN201696311U (en) * | 2010-05-27 | 2011-01-05 | 河南众力空分设备有限公司 | Centrifugal compressor with variable inlet guide vane and rotatable vane diffuser |
| CN201916218U (en) * | 2010-12-30 | 2011-08-03 | 沈阳鼓风机集团股份有限公司 | Gear type air compressor for PTA (pure terephthalic acid) device |
| CN202209314U (en) * | 2011-08-19 | 2012-05-02 | 无锡杰尔压缩机有限公司 | Efficient energy-saving single-stage high-speed centrifugal blower |
| CN102261344A (en) * | 2011-08-31 | 2011-11-30 | 无锡杰尔压缩机有限公司 | Synchronous regulating device of high-speed centrifugal fan outlet guide vane |
| CN202746223U (en) * | 2012-07-19 | 2013-02-20 | 无锡杰尔压缩机有限公司 | Two-stage high-speed centrifugal compressor |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061172A (en) * | 2013-03-20 | 2014-09-24 | 上海宝钢工业技术服务有限公司 | Atomizing air blower |
| CN103362863A (en) * | 2013-08-02 | 2013-10-23 | 无锡杰尔压缩机有限公司 | Centrifugal vapor compressor |
| CN108713100A (en) * | 2016-03-11 | 2018-10-26 | 大金应用美国股份有限公司 | Centrifugal compressor with the recycling of adjustable entrance |
| CN110374892A (en) * | 2019-07-09 | 2019-10-25 | 中国航发哈尔滨东安发动机有限公司 | A kind of centrifugal two-stage air compressor of high-speed direct-drive |
| CN110454439A (en) * | 2019-09-24 | 2019-11-15 | 重庆通用工业(集团)有限责任公司 | A kind of spiral case |
| CN110454439B (en) * | 2019-09-24 | 2024-06-07 | 重庆通用工业(集团)有限责任公司 | Volute casing |
| WO2022111411A1 (en) * | 2020-11-24 | 2022-06-02 | 青岛海尔智能技术研发有限公司 | Centrifugal compressor |
| WO2024066423A1 (en) * | 2022-09-28 | 2024-04-04 | 哈电发电设备国家工程研究中心有限公司 | 15 mw transcritical carbon dioxide centrifugal compressor |
| CN116378977A (en) * | 2023-04-06 | 2023-07-04 | 山东众海机械有限公司 | Magnetic suspension centrifugal air compressor secondary compression system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102808785A (en) | Secondary high-speed centrifugal compressor | |
| CN103362863A (en) | Centrifugal vapor compressor | |
| US7571607B2 (en) | Two-shaft turbocharger | |
| US20050226720A1 (en) | Contra rotatable turbine system | |
| KR101327341B1 (en) | Rotating wheel used for direct-connection low-speed small-scale mixed-flow hydroturbine of hydrodynamic energy-saving cooling tower | |
| JP6263170B2 (en) | Combination of two gas turbines to drive a load | |
| CN102080578B (en) | Compound turbo supercharging device having variable cross-section axial radial flows | |
| CN101949305A (en) | Turbocharger composite nozzle device | |
| CN101074677A (en) | Hydraulically-driven fan for cooling tower | |
| CN203130545U (en) | Novel non-volute draught fan | |
| CN102536432A (en) | Counter-rotating turbine combination device and engine system with same | |
| WO2010135988A1 (en) | Direct-connection low-speed small-scale mixed-flow hydroturbine seat ring applied in hydrodynamic energy-saving cooling tower | |
| CN202209314U (en) | Efficient energy-saving single-stage high-speed centrifugal blower | |
| CN202746223U (en) | Two-stage high-speed centrifugal compressor | |
| CN202579249U (en) | Centrifugal compressor with multiple shafts | |
| CN1301364C (en) | High efficiency compressor for gas turbine | |
| CN201763673U (en) | Mixed flow type fan | |
| CN202867282U (en) | Double-stage high-speed centrifugal blower structure | |
| CN202971312U (en) | Novel two-stage low-speed centrifugal blower structure | |
| CN201794621U (en) | Composite spraying nozzle device of turbocharger | |
| CN102235388A (en) | High-efficiency energy-saving single-stage high-speed centrifugal blower | |
| CN203516186U (en) | Centrifugal steam compressor | |
| CN202273713U (en) | Nozzle assembly of variable-cross-section superchargers | |
| CN113738532A (en) | Aero-engine with overlapped ducts | |
| CN201339531Y (en) | Hydraulic turbine of double-impeller power cooling tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121205 |