CN107299905A - A kind of multistage high rate turbine vacuum pump of both-end entrance - Google Patents
A kind of multistage high rate turbine vacuum pump of both-end entrance Download PDFInfo
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- CN107299905A CN107299905A CN201611160936.6A CN201611160936A CN107299905A CN 107299905 A CN107299905 A CN 107299905A CN 201611160936 A CN201611160936 A CN 201611160936A CN 107299905 A CN107299905 A CN 107299905A
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- 230000003137 locomotive effect Effects 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000003814 drug Substances 0.000 abstract description 3
- 239000004753 textile Substances 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- -1 papermaking Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004577 thatch Substances 0.000 description 1
Classifications
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of multistage high rate turbine vacuum pump of both-end entrance, generally horizontal type structure, the structure type being used in mixed way using aial flow impeller and radial flow impeller, the characteristics of with double in-and outlet, mainly by external admission section (1), aial flow impeller (2), axial-flow type stator (3), interior air inlet section (4), radial flow impeller (5), radial-flow type stator (6), exhaust section (7), high-speed electric expreess locomotive (8), bearing (9) and bearing (10) etc. are constituted, the present invention combines the characteristic of turbomachinery efficient high-speed, axial-flow type and radial turbine vacuum pump structure and feature performance benefit are taken into account, compact conformation, the multistage high rate turbine machinery of both-end entrance operated steadily, modern industry can be met to condition of high vacuum degree, the extraction of big rate of air sucked in required, use in terms of energy-conserving and environment-protective needs, suitable for oil, chemical industry, electric power, light textile, papermaking, medicine and other fields.
Description
Technical field
The present invention relates to turbomachinery field, more particularly to a kind of multistage high rate turbine vacuum pump of both-end entrance, it is adaptable to
Oil, chemical industry, electric power, light textile, papermaking, medicine and other fields.
Background technology
With the modernization development of the progress and industry of society, vacuum application technology is right in production and field of scientific study
The requirement of its rate of air sucked in required and vacuum ranges is more and more wider, it is generally the case that constitute vacuum system by vavuum pump and other equipment,
It is widely used in the fields such as oil, chemical industry, machinery, mine, light industry, medicine, food, electronics, metallurgy, space flight, and existing market
The wide conventional vacuum pump product of upper application mainly has liquid-ring vacuum pump, rotary-vane vaccum pump, reciprocating vacuum pump and sieve
Thatch vavuum pump etc..
Liquid rotary pump belongs to rough vacuum pump, and rotor eccentricity is arranged in the pump housing, using water as hydraulic fluid during rotation, by pump chamber
The change of volume realizes air-breathing, compression and is vented that, it is therefore desirable to consume water and act on the energy consumption of water, rotating speed is generally below
3000r/min, although still there is larger market in the field such as oil, chemical industry, electric power, light textile, papermaking at home.But it generally there are
Vacuum and the low problem of efficiency, efficiency is typically 30% or so, and highest also only has 50%.
Rotary-vane vaccum pump is a kind of mechanical low-voltage vacuum pump, the rotor eccentricity of two or more the blades with spring
In the pump housing, during rotation, using oil as sealing medium, make by the elastic force of centrifugal force and spring in blade top and pump chamber
Wall keep contact with slide, periodic variation porting volume come realize air-breathing with exhaust, so, need consumption oil with make
It is less efficient for the energy consumption of oil, while rate of air sucked in required is also smaller.
Reciprocating pump belongs to positive-displacement vacuum pump, and being moved by connecting rod-crankshaft mechanism in crankcase makes piston in cylinder
In reciprocating, the volume of periodic variation suction air cavity, and by air inlet-exhaust valve effect complete suction and discharge action, from
And obtain vacuum.Reciprocating vacuum pump is inapplicable for extracting corrosivity or gas containing particulate dust.It is reciprocal true
Empty pump belongs to low vacuum and obtains equipment, and more sensitive to dust granule etc..
In a word, the deficiencies such as above positive-displacement vacuum pump generally existing efficiency is low, high energy consumption, noise is big, rate of air sucked in required is small, especially
It is for needing to meet during big rate of air sucked in required requirement, although water ring vacuum pump or liquid-ring vacuum pump can meet use requirement, also depositing
Configuring the problems such as quantity is more, floor space is big.With the progress in epoch, the quick of modern industrialization pushes ahead, mesh
The preceding demand to big flow, condition of high vacuum degree Turbomachinery equipment is more and more, it is desirable to also increasingly harsher, for big rate of air sucked in required,
The reliable and stable Turbomachinery equipment of high-efficiency environment friendly is researched and proposed and using extremely urgent.
According to the deficiency of positive-displacement vacuum pump, while comprehensive consideration axial-flow type vacuum turbomachinery rate of air sucked in required of taking into account is big, effect
Rate is high but swabbing pressure is low and Centrifugal Vacuum turbomachinery is aspirated with that can meet Intermediate High Pressure, the features such as steady working condition is wide,
A kind of multistage high rate turbine vacuum pump of both-end entrance is proposed, and to adapt to vacuum drawn and pressure of the modern industry to big rate of air sucked in required
The high-efficiency environment friendly of contracting equipment, the development need with vacuum in terms of integrated.
The content of the invention
For solve the deficiencies in the prior art, with reference to the characteristic of turbomachinery efficient high-speed, taken into account axial-flow type with
Radial turbine vacuum pump structure and feature performance benefit are there is provided one kind is simple in construction, and the multistage high speed of the both-end entrance operated steadily is saturating
Flat vavuum pump, to meet modern industry to condition of high vacuum degree, the extraction of big rate of air sucked in required, the use in terms of energy-conserving and environment-protective needs.
The technical solution adopted by the present invention is：
Complete machine mainly includes external admission section (1), aial flow impeller (2), axial-flow type stator (3), interior air inlet section (4), runoff
Formula impeller (5), radial-flow type stator (6), exhaust section (7), high-speed electric expreess locomotive (8), bearing (9) and bearing (10), it is characterised in that：It is whole
Machine totally uses horizontal type structure, and pump section is located at the symmetrical form in high-speed electric expreess locomotive (8) two ends respectively, and complete machine has two gases
Suction inlet (13), (14) and two gas discharge outlets (15), (16), impeller is cantilevered, using aial flow impeller and radial-flow type
Aial flow impeller and stator are both housed in the structure type that impeller is used in mixed way, pump section, radial flow impeller and stator are housed again, and
And radial flow impeller and stator are multistage；
Connected mode：
Axial-flow type stator (3), interior air inlet section (4) and radial-flow type stator (6) are respectively provided with external admission section (1), and outside
Air inlet section is fixed on exhaust section (7) with exhaust section (7) in bolted mode, and exhaust section (7) is then arranged on electricity at a high speed
On machine (8)；
Aial flow impeller is arranged on the end of axle, in axial-flow type stator；
Radial flow impeller is mounted on an axle, wherein：Chopped-off head radial flow impeller is located at interior air inlet section (4) and radial-flow type stator shape
Into cavity in, secondary radial flow impeller be located at two radial-flow type stators formation cavity in, final stage radial flow impeller be located at runoff
In the cavity that formula stator (6) is formed with exhaust section；
Aial flow impeller (2), radial flow impeller (5), bearing (9) is respectively mounted and same axis (10) with motor stator (12)
On, axle two ends are fixed equipped with axis head nut (11).
A kind of multistage high rate turbine vacuum pump of both-end entrance, the radial flow impeller (2) can be half-opened impeller or enclosed
Impeller.
A kind of multistage high rate turbine vacuum pump of both-end entrance, to improve the suction capactity of vavuum pump, and reduces complete machine
Size and floor space, high rate turbine vacuum pump need to bring up to higher rotating speed, it is preferable that described axle (10) is made hollow
Axle can reduce the weight of rotor, so as to effectively improve the intrinsic frequency of rotor, reach the more operation of stabilization at a high speed.
The multistage high rate turbine vacuum pump of a kind of both-end entrance, it is preferable that the bearing (9) uses magnetic suspension bearing to meet
The operation of intermediate pump high-speed smooth of the present invention.
A kind of multistage high rate turbine vacuum pump of both-end entrance, exhaust section (7) inner chamber can be alternatively for annular extrusion chamber
Scroll casing type delivery chamber, its intracavity section can be circle, pyriform or trapezoidal.
The multistage high rate turbine vacuum pump of a kind of both-end entrance, because air-flow has first passed through the aial flow impeller of axle front end with leading
Leaf, enters among the inner chamber of interior air inlet section and has carried out mixing and flow into again among radial flow impeller, but due to radial flow impeller
Inlet diameter is much smaller with respect to aial flow impeller external diameter, can produce certain flowing conversion, so, in order that air-flow is from axle stream
Formula stator is more preferably more smoothly transitioned into radial flow impeller import, it is preferable that the axial width L of interior air inlet section (4) ante-chamber0
It is taken as interior air inlet section ante-chamber inlet diameter D00.1-0.18 times.
The multistage high rate turbine vacuum pump of a kind of both-end entrance, it is preferable that the aial flow impeller number of blade uses 26-32
Piece.
Beneficial effects of the present invention are：
(1) take into account in the advantage and disadvantage for considering axial-flow type vacuum turbomachinery and Centrifugal Vacuum turbomachinery, the present invention
High rate turbine vacuum pump has rate of air sucked in required big, efficiency high, can meet Intermediate High Pressure suction, and steady working condition it is wide the advantages of.
(2) structural shape of both-end axisymmetric inlet, while the suction of big flow operating mode is met, can effectively eliminate turbine
The axial force of vavuum pump, the stability of complete machine is significantly lifted.
(3) the isostructural application of hollow shaft, relative to general high rate turbine vacuum pump, the turbomachinery in the present invention is whole
The small compact, rotating speed of machine size is relatively higher, high-efficiency environment friendly, reliable and stable.
Brief description of the drawings
Fig. 1 is a kind of both-end entrance multistage high-speed turbine vacuum pump structure diagram of one embodiment of the invention.
In figure, 1. external admissions section；2. aial flow impeller；3. axial-flow type stator；4. in air inlet section；5. radial flow impeller；6.
Radial-flow type stator；7. exhaust section；8. high-speed electric expreess locomotive；9. bearing；10. axle；11. axis head nut；12. motor stator；13. gas is inhaled
Entrance m；14. gas suction inlet n；15. gas discharge outlet m；16. gas discharge outlet n；a:Chopped-off head radial flow impeller；b:Secondary footpath
Flow impeller；c:Final stage radial flow impeller；D0:Interior air inlet section inlet diameter；L0:Interior air inlet section enters preoral cavity axial width.
Embodiment
The present invention is introduced with reference to the accompanying drawings and detailed description.
As shown in Figure 1：
Complete machine mainly includes external admission section (1), aial flow impeller (2), axial-flow type stator (3), interior air inlet section (4), runoff
Formula impeller (5), radial-flow type stator (6), exhaust section (7), high-speed electric expreess locomotive (8), bearing (9) and bearing (10), it is characterised in that：It is whole
Machine totally uses horizontal type structure, and pump section is located at the symmetrical form in high-speed electric expreess locomotive (8) two ends respectively, and complete machine has two gases
Suction inlet (13), (14) and two gas discharge outlets (15), (16), impeller is cantilevered, using aial flow impeller and radial-flow type
Aial flow impeller and stator are both housed in the structure type that impeller is used in mixed way, pump section, radial flow impeller and stator are housed again, and
And radial flow impeller and stator are multistage, radial flow impeller is three-level in the present embodiment；
Connected mode：
Axial-flow type stator (3), interior air inlet section (4) and radial-flow type stator (6) are respectively provided with external admission section (1), and outside
Air inlet section is fixed on exhaust section (7) with exhaust section (7) in bolted mode, and exhaust section (7) is then arranged on electricity at a high speed
On machine (8)；
Aial flow impeller is arranged on the end of axle, in axial-flow type stator；
Radial flow impeller is mounted on an axle, wherein：Chopped-off head radial flow impeller is located at interior air inlet section (4) and radial-flow type stator shape
Into cavity in, secondary radial flow impeller be located at two radial-flow type stators formation cavity in, final stage radial flow impeller be located at runoff
In the cavity that formula stator (6) is formed with exhaust section；
Aial flow impeller (2), radial flow impeller (5), bearing (9) is respectively mounted and same axis (10) with motor stator (12)
On, axle two ends are fixed equipped with axis head nut (11).
A kind of multistage high rate turbine vacuum pump of both-end entrance, the radial flow impeller (2) can be half-opened impeller or enclosed
Impeller.
A kind of multistage high rate turbine vacuum pump of both-end entrance, to improve the suction capactity of vavuum pump, and reduces complete machine
Size and floor space, high rate turbine vacuum pump need to bring up to higher rotating speed, it is preferable that described axle (10) is made hollow
Axle can reduce the weight of rotor, so as to effectively improve the intrinsic frequency of rotor, reach the more operation of stabilization at a high speed.
The multistage high rate turbine vacuum pump of a kind of both-end entrance, it is preferable that the bearing (9) uses magnetic suspension bearing to meet
The operation of intermediate pump high-speed smooth of the present invention.
A kind of multistage high rate turbine vacuum pump of both-end entrance, exhaust section (7) inner chamber can be that ring is scroll casing type delivery chamber,
Its intracavity section is circle.
The multistage high rate turbine vacuum pump of a kind of both-end entrance, because air-flow has first passed through the aial flow impeller of axle front end with leading
Leaf, enters among the inner chamber of interior air inlet section and has carried out mixing and flow into again among radial flow impeller, but due to radial flow impeller
Inlet diameter is much smaller with respect to aial flow impeller external diameter, can produce certain flowing conversion, so, in order that air-flow is from axle stream
Formula stator is more preferably more smoothly transitioned into radial flow impeller import, it is preferable that the axial width L of interior air inlet section (4) ante-chamber0
It is taken as interior air inlet section ante-chamber inlet diameter D00.1-0.18 times, the present embodiment is gone as 0.13 times.
The multistage high rate turbine vacuum pump of a kind of both-end entrance, it is preferable that the aial flow impeller number of blade uses 26-32
Piece, 28 pieces are taken in the present embodiment.
Protection scope of the present invention is not limited to above-described embodiment, also comprising other implementations in the utility model concept
Example and variation.
Claims (7)
1. a kind of multistage high rate turbine vacuum pump of both-end entrance, mainly includes external admission section (1), aial flow impeller (2), axial-flow type
Stator (3), interior air inlet section (4), radial flow impeller (5), radial-flow type stator (6), exhaust section (7), high-speed electric expreess locomotive (8), bearing (9)
With bearing (10), it is characterised in that：Complete machine totally uses horizontal type structure, and pump section is located at high-speed electric expreess locomotive (8) two ends in left and right respectively
Symmetric form, complete machine has two gas suction inlets (13), (14) and two gas discharge outlets (15), and (16), impeller is cantilever
Aial flow impeller and stator are both housed in formula, pump section, radial flow impeller and stator are housed again, and radial flow impeller is with stator
It is multistage；
Connected mode：
Axial-flow type stator (3), interior air inlet section (4) and radial-flow type stator (6) are respectively provided with the external admission section (1), and outside
Air inlet section is fixed on exhaust section (7) with exhaust section (7) in bolted mode, and exhaust section (7) is then arranged on electricity at a high speed
On machine (8)；
The aial flow impeller is arranged on the end of axle, in axial-flow type stator；
The radial flow impeller is mounted on an axle, wherein：Chopped-off head radial flow impeller is located at interior air inlet section (4) and radial-flow type stator shape
Into cavity in, secondary radial flow impeller be located at two radial-flow type stators formation cavity in, final stage radial flow impeller be located at runoff
In the cavity that formula stator (6) is formed with exhaust section；
The aial flow impeller (2), radial flow impeller (5), bearing (9) is respectively mounted and same axis (10) with motor stator (12)
On, axle two ends are fixed equipped with axis head nut (11).
2. the multistage high rate turbine vacuum pump of a kind of both-end entrance according to claim 1, it is characterised in that：The radial-flow type
Impeller (2) can be half-opened impeller or double shrouded wheel.
3. the multistage high rate turbine vacuum pump of a kind of both-end entrance according to claim 1, it is characterised in that：Described axle
(10) it is hollow shaft.
4. the multistage high rate turbine vacuum pump of a kind of both-end entrance according to claim 1, it is characterised in that：The bearing
(9) it is magnetic suspension bearing.
5. the multistage high rate turbine vacuum pump of a kind of both-end entrance according to claim 1, it is characterised in that：The exhaust section
(7) inner chamber can be alternatively scroll casing type delivery chamber for annular extrusion chamber, and its intracavity section can be circle, pyriform or trapezoidal.
6. the multistage high rate turbine vacuum pump of a kind of both-end entrance according to claim 1, it is characterised in that：The interior air inlet
The axial width L of section (4) ante-chamber0For interior air inlet section ante-chamber inlet diameter D00.1-0.18 times.
7. the multistage high rate turbine vacuum pump of a kind of both-end entrance according to claim 1, it is characterised in that：The axial-flow type
Impeller blade number is 26-32 pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611160936.6A CN107299905A (en) | 2016-12-15 | 2016-12-15 | A kind of multistage high rate turbine vacuum pump of both-end entrance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611160936.6A CN107299905A (en) | 2016-12-15 | 2016-12-15 | A kind of multistage high rate turbine vacuum pump of both-end entrance |
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|---|---|
| CN107299905A true CN107299905A (en) | 2017-10-27 |
Family
ID=60138091
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|---|---|---|---|
| CN201611160936.6A Pending CN107299905A (en) | 2016-12-15 | 2016-12-15 | A kind of multistage high rate turbine vacuum pump of both-end entrance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637069A (en) * | 2020-07-07 | 2020-09-08 | 中国空气动力研究与发展中心超高速空气动力研究所 | A multi-inlet high-speed centrifugal vacuum pump set |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122294A (en) * | 2007-09-07 | 2008-02-13 | 浙江大学 | Cantilever type high-speed turbo vacuum pump and vacuum pumping method thereof |
| US20120107108A1 (en) * | 2009-08-19 | 2012-05-03 | Hideki Nagao | Radial gas expander |
| CN102678582A (en) * | 2012-04-16 | 2012-09-19 | 杭州萧山美特轻工机械有限公司 | High-speed cantilever multistage turbine vacuum pump |
| CN106089728A (en) * | 2016-06-27 | 2016-11-09 | 华北水利水电大学 | A kind of horizontal multi-stage centrifugal pump |
-
2016
- 2016-12-15 CN CN201611160936.6A patent/CN107299905A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122294A (en) * | 2007-09-07 | 2008-02-13 | 浙江大学 | Cantilever type high-speed turbo vacuum pump and vacuum pumping method thereof |
| US20120107108A1 (en) * | 2009-08-19 | 2012-05-03 | Hideki Nagao | Radial gas expander |
| CN102678582A (en) * | 2012-04-16 | 2012-09-19 | 杭州萧山美特轻工机械有限公司 | High-speed cantilever multistage turbine vacuum pump |
| CN106089728A (en) * | 2016-06-27 | 2016-11-09 | 华北水利水电大学 | A kind of horizontal multi-stage centrifugal pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637069A (en) * | 2020-07-07 | 2020-09-08 | 中国空气动力研究与发展中心超高速空气动力研究所 | A multi-inlet high-speed centrifugal vacuum pump set |
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Application publication date: 20171027 |