CN103225624A - Double-casing symmetric type radial subdivision multiple-stage centrifugal pump - Google Patents
Double-casing symmetric type radial subdivision multiple-stage centrifugal pump Download PDFInfo
- Publication number
- CN103225624A CN103225624A CN2013101452779A CN201310145277A CN103225624A CN 103225624 A CN103225624 A CN 103225624A CN 2013101452779 A CN2013101452779 A CN 2013101452779A CN 201310145277 A CN201310145277 A CN 201310145277A CN 103225624 A CN103225624 A CN 103225624A
- Authority
- CN
- China
- Prior art keywords
- pump
- centrifugal pump
- bearing
- symmetric type
- deflector
- 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
Classifications
-
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a double-casing symmetric type radial subdivision multiple-stage centrifugal pump which comprises an outer casing body and a core bag component, wherein the core bag component comprises a pump shaft and an inner casing, as well as two impeller components arranged inside the inner casing; each impeller component comprises a plurality of impellers sleeved with the pump shaft, and a plurality of guide vanes; and the rotation directions of the two impeller components are opposite and arranged back to back on the suction side and the delivery side of the pump. According to the invention, the two impeller components are arranged back to back so as to achieve self-balancing of axial force; and the double-casing symmetric type radial subdivision multiple-stage centrifugal pump has characteristics of reasonable and reliable structure and efficiency and energy conservation, and can be widely applied to industries of petroleum, petrochemical engineering, chemical engineering, electric power, smelting and the like.
Description
Technical field
The invention belongs to the centrifugal pump field, be specifically related to radially subdivision multistage centrifugal pump of a kind of bivalve body symmetric type.
Background technique
Centrifugal pump is flowing medium (gas and a liquid, also can be suspended particulate and gas or mixtures of liquids) enter from blade rotor root (import), medium relies on the high speed rotating blade to obtain centrifugal force, produces a high pressure, from the medium transport equipment of pressure relief opening (outlet) outflow.Multistage centrifugal pump is that the plural pump that will have said function gathers together, on the fluid channel structure, the medium pressure relief opening that shows the first order communicates with partial import, and partial medium pressure relief opening communicates with the import of the third level, and so the mechanism of series connection has formed multistage centrifugal pump.The meaning of multistage centrifugal pump is to improve setting pressure.
Current, the multistage centrifugal pump of various applications all can produce bigger axial force in the use.Because when impeller is worked, the impeller number that can produce axial force, particularly multistage centrifugal pump on impeller is many more, and it is serious more that its axial force produces.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, radially subdivision multistage centrifugal pump of a kind of bivalve body symmetric type that can realize axial force self-balancing is provided.
The present invention is achieved through the following technical solutions:
A kind of bivalve body symmetric type is the subdivision multistage centrifugal pump radially, comprises frame and core pack assembly; Described core pack assembly comprises pump shaft and inner housing, and is arranged on two impeller assemblies in the inner housing, and each impeller assembly includes a plurality of impellers and a plurality of stator that is enclosed within on the pump shaft; Opposite, back-to-back suction side and the exhaust end that is arranged in pump of the sense of rotation of two impeller assemblies.
The further setting of the present invention is that described frame comprises outer cylinder body, front pump cover, rear pump cover and tail-hood, and the equal sealing and fixing of front pump cover and rear pump cover is installed on the two ends of outer cylinder body; Tail-hood and rear pump cover are connected; Integrated setting has clutch shaft bearing body carriage on the described front pump cover; Integrated setting has the second bearing support carriage on the described tail-hood.
The further setting of the present invention is that described pump shaft is installed in the frame by two bearing suppories; Described bearing support is a self oiling bearing body or forced-lubrication bearing body; Described self oiling bearing body comprises bearing shell and one group of angular contact ball bearing; Described forced-lubrication bearing body comprises bearing shell and one group of tile fragment formula thrust-bearing.
The further setting of the present invention is, described inner housing comprises chopped-off head stage casing, first stage casing, middle deflector, reverse deflector, second stage casing and the final stage stage casing that is communicated with successively, the final stage stage casing communicates with middle deflector, and middle deflector communicates with the chamber of spuing of centrifugal pump.
The further setting of the present invention is that described final stage stage casing is provided with tap structure.
The further setting of the present invention is, deflector lining and balance bush in the middle of described pump shaft is provided with, deflector lining and middle deflector are connected in the middle of described, described balance bush and outer cylinder body are connected, and are provided with a maze-type structure in the endoporus of described middle deflector lining and balance bush.
The further setting of the present invention is, is provided with a core bag spacer between described core pack assembly and the frame, and described core bag spacer is a flat gasket.
The further setting of the present invention is, adopts O RunddichtringO static seal between described final stage stage casing and the middle deflector, and both connect by straight pin.
The further setting of the present invention is that described core pack assembly links together by a long threaded rod and nut.
Bivalve of the present invention body symmetric type is subdivision multistage centrifugal pump (TDFB series pump) radially, has following beneficial effect:
1. the suction side of pump and exhaust end have two groups of impellers, and from the suction eye side, the sense of rotation of two groups of impellers is opposite each other, arrange back-to-back, so can realize the self balancing of axial force.Have rational in infrastructure reliable, energy-efficient characteristics; Can be widely used in industries such as oil, petrochemical industry, chemical industry, electric power, smelting.
2. suction side front pump cover, tail-hood and bearing support carriage are the integrated design, and so are provided with to reduce axial dimension, make compact structure.
3. bearing support is middle open type, full circle linkage structure; Can adopt selflubricating, also can adopt pressure lubrication, be convenient to install and use.
4. the chopped-off head stage casing band tap structure in the Inner housing can carry out from flushing or as other pump intakes.
5. middle deflector lining becomes maze-type structure, better effects if with the balance bush bore design.
6. core bag spacer is designed to a flat gasket, and design is useful on the clearance for expansion of higher temperature operating mode; Compare in an official document or note spring of the prior art or wound gasket, structure is simple more, better effects if.
7. the static seal of final stage stage casing and middle deflector adopts the sealing of O RunddichtringO, and both prevent to relatively rotate by straight pin; Compared with prior art, non-bolt of the present invention connects, the structure stress requirement in the time of can better meeting pump operation.
8. it is as a whole to adopt the long threaded rod of lengthening and nut that the core bag is connected into, and promptly long threaded rod passes the final stage stage casing and middle deflector connects, and so can be convenient to the dismounting of core pack assembly.
Description of drawings
Fig. 1 is the radially structural drawing of subdivision multistage centrifugal pump of bivalve of the present invention body symmetric type;
Fig. 2 is self oiling bearing body structure figure;
Fig. 3 is forced-lubrication bearing body structure figure;
Fig. 4 is the maze-type structure figure of balance bush endoporus;
Among the figure: pump shaft 1, bearing support 2, front pump cover 3, chopped-off head stage casing 4, first stage impeller 5, chopped-off head stator 6, first stage casing 7, secondary impeller 8, final stage stator 9, middle deflector 10, middle deflector lining 11, reverse deflector 12, core bag spacer 13, rear pump cover 14, tail-hood 15, balance bush 16, second stage casing 17, final stage stage casing 18, outer cylinder body 19, long threaded rod 20.
Embodiment
The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
Bivalve of the present invention body symmetric type radially subdivision multistage centrifugal pump (TDFB series pump) is the structure that multistage, cartridge type, inner housing sectional type, impeller are arranged back-to-back.As shown in Figure 1, it comprises frame and core pack assembly; Described core pack assembly comprises pump shaft 1 and inner housing, and is arranged on two impeller assemblies in the inner housing, and each impeller assembly includes a plurality of impellers and a plurality of stator that is enclosed within on the pump shaft 1; Opposite, back-to-back suction side and the exhaust end that is arranged in pump of the sense of rotation of two impeller assemblies.The core pack assembly can be used as an integral body and splits out or the frame of packing in frame.This centrifugal pump is that two groups of impellers are arranged back-to-back, can realize the self balancing of axial force; Adjust the diameter of balance set by design, in two impeller assemblies the quantity of impeller can be identical also can different (when impeller adds up to odd number).The impeller of pump and pump shaft 1 are Spielpassung, impeller on pump shaft 1 for step by step the location.From the shaft extension end of pump, turning to of pump is clockwise direction rotation (also can be designed as rotation counterclockwise) in the present embodiment, and promptly one of the suction side group of impeller is that one group of impeller of exhaust end is for being rotated counterclockwise clockwise.The fluid that impeller is carried carries out pressure recovery and water conservancy diversion to the next stage impeller eye by stator, passes through the discharge opening efflux pump at last.
Described frame comprises outer cylinder body 19, front pump cover 3, rear pump cover 14 and tail-hood 15, and front pump cover 3 and rear pump cover 14 equal sealing and fixing are installed on the two ends of outer cylinder body 19; Tail-hood 15 is connected with rear pump cover 14; Integrated setting has clutch shaft bearing body carriage on the described front pump cover 3; Integrated setting has the second bearing support carriage on the described tail-hood 15.Wherein, frame is cartridge type, forging structure, and the supporting way of frame is the center line horizontal support, also can be designed to footing and support.Frame is provided with and sucks and the flange that spues, and sucks and the flange that spues is all arranged vertically upward, also can be designed to horizontal arrangement.
Described inner housing comprises chopped-off head stage casing 4, first stage casing 7, middle deflector 10, reverse deflector 26, second stage casing 17 and the final stage stage casing 18 that is communicated with successively, final stage stage casing 18 communicates with middle deflector 10, and middle deflector 10 communicates with the chamber of spuing of centrifugal pump; Described final stage stage casing 18 is provided with tap structure.Inner housing is the sectional type structure, correspondingly with impeller is divided into two groups, is strained and fixed with turnbuckle respectively.Transition runner on the middle deflector 10 all adopts the processing method of removing material to finish, and guarantees that the surface of runner has higher degree of finish.
Described pump shaft 1 is installed in the frame by two bearing suppories 2; Described bearing support 2 is a self oiling bearing body or forced-lubrication bearing body; Described self oiling bearing body comprises bearing shell and one group of angular contact ball bearing (as shown in Figure 2); Described forced-lubrication bearing body comprises bearing shell and one group of tile fragment formula thrust-bearing (as shown in Figure 3).What the axle envelope of pump adopted is mechanical seal, and seal style and corresponding flushing scheme are selected according to concrete medium and service condition.The radial bearing of pump is a sliding bearing.Thrust bearing is one a group of back-to-back angular contact ball bearing or a cover thrust slide bearing.Supporting and the lubricating system of bearing will be matched according to conditions such as concrete power, rotating speeds.Overcurrent in the pump zero, component materials can be selected accordingly according to concrete medium working condition.
Be provided with a core bag spacer 13 between described core pack assembly and the frame, described core bag spacer 13 is a flat gasket.Adopt O RunddichtringO static seal between described final stage stage casing 18 and the middle deflector 10, both prevent to relatively rotate by straight pin, and non-bolt connects, the structure stress requirement when satisfying pump operation.
For ease of the dismounting of core bag, adopt the long threaded rod 20 of lengthening and nut that the core pack assembly is connected into as a whole (being that long threaded rod 20 passes final stage stage casing 18 and middle deflector 10 connects).
The working principle of centrifugal pump of the present invention is as follows:
Flowing medium enters into front pump cover 3 by the suction port on the outer cylinder body 19, the suction chamber that outer cylinder body 19 and chopped-off head stage casing 4 constitute, and thrown away after first stage impeller 5 suctions, flow through chopped-off head stator 6 and enter into secondary impeller 8, afterbody impeller in first group and stator are derived, through middle deflector 10, long runner enters second first order impeller in the impeller assembly after flowing into reverse deflector 12, the fluid that throws away from this impeller enters into the next stage impeller by stator, impeller and final stage stator 9 up to the last grade, import to the chamber that spues by middle deflector 10 at last, flow in the pipe-line system that spues by the discharge opening that communicates with the chamber of spuing again.
The above is preferred embodiment of the present invention, and all equivalent variations of being done according to the present patent application claim all should belong to protection scope of the present invention.
Claims (9)
1. bivalve body symmetric type subdivision multistage centrifugal pump radially is characterized in that, comprises frame and core pack assembly; Described core pack assembly comprises pump shaft (1) and inner housing, and is arranged on two impeller assemblies in the inner housing, and each impeller assembly includes a plurality of impellers and a plurality of stator that is enclosed within on the pump shaft; Opposite, back-to-back suction side and the exhaust end that is arranged in pump of the sense of rotation of two impeller assemblies.
2. bivalve according to claim 1 body symmetric type is the subdivision multistage centrifugal pump radially, it is characterized in that, described frame comprises outer cylinder body (19), front pump cover (3), rear pump cover (14) and tail-hood (15), and the equal sealing and fixing of front pump cover (3) and rear pump cover (14) is installed on the two ends of outer cylinder body (19); Tail-hood (15) is connected with rear pump cover (14); Described front pump cover (3) is gone up integrated setting clutch shaft bearing body carriage; Described tail-hood (15) is gone up integrated setting the second bearing support carriage.
3. bivalve according to claim 1 body symmetric type is the subdivision multistage centrifugal pump radially, it is characterized in that, described pump shaft (1) is installed in the frame by two bearing suppories (2); Described bearing support (2) is a self oiling bearing body or forced-lubrication bearing body; Described self oiling bearing body comprises bearing shell and one group of angular contact ball bearing; Described forced-lubrication bearing body comprises bearing shell and one group of tile fragment formula thrust-bearing.
4. bivalve according to claim 2 body symmetric type is the subdivision multistage centrifugal pump radially, it is characterized in that, described inner housing comprises chopped-off head stage casing (4), first stage casing (7), middle deflector (10), reverse deflector (26), second stage casing (17) and final stage stage casing (18) that are communicated with successively, final stage stage casing (18) communicates with middle deflector (10), and middle deflector (10) communicates with the chamber of spuing of centrifugal pump.
5. bivalve according to claim 4 body symmetric type is the subdivision multistage centrifugal pump radially, it is characterized in that, described final stage stage casing (18) is provided with tap structure.
6. bivalve according to claim 4 body symmetric type is the subdivision multistage centrifugal pump radially, it is characterized in that, deflector lining (11) and balance bush (16) in the middle of described pump shaft (1) is provided with, deflector lining (11) is connected with middle deflector (10) in the middle of described, described balance bush (16) is connected with outer cylinder body (19), is provided with a maze-type structure in the endoporus of described middle deflector lining (11) and balance bush (16).
7. bivalve according to claim 1 body symmetric type is the subdivision multistage centrifugal pump radially, it is characterized in that, is provided with a core bag spacer (13) between described core pack assembly and the frame, and described core bag spacer (13) is a flat gasket.
8. bivalve according to claim 4 body symmetric type is the subdivision multistage centrifugal pump radially, it is characterized in that, adopts O RunddichtringO static seal between described final stage stage casing (18) and the middle deflector (10), and both connect by straight pin.
9. bivalve according to claim 1 body symmetric type is the subdivision multistage centrifugal pump radially, it is characterized in that, described core pack assembly links together by a long threaded rod (20) and nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101452779A CN103225624A (en) | 2013-04-24 | 2013-04-24 | Double-casing symmetric type radial subdivision multiple-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101452779A CN103225624A (en) | 2013-04-24 | 2013-04-24 | Double-casing symmetric type radial subdivision multiple-stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103225624A true CN103225624A (en) | 2013-07-31 |
Family
ID=48836200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101452779A Pending CN103225624A (en) | 2013-04-24 | 2013-04-24 | Double-casing symmetric type radial subdivision multiple-stage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103225624A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511287A (en) * | 2013-10-23 | 2014-01-15 | 大连深蓝泵业有限公司 | Horizontal-type radial subdivision volute-type dual-cylinder pump |
| CN104675751A (en) * | 2015-01-21 | 2015-06-03 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Centrifugal pump case |
| CN105697382A (en) * | 2014-11-28 | 2016-06-22 | 上海凯泉泵业（集团）有限公司 | Radially split double-shell multiple-stage centrifugal pump |
| CN105909526A (en) * | 2016-04-19 | 2016-08-31 | 湖南天奥星泵业有限公司 | Radial dissection two-end support type four-stage centrifugal pump |
| CN107542670A (en) * | 2017-09-27 | 2018-01-05 | 上海阿波罗机械股份有限公司 | Small pump and small pump pump group |
| CN107559206A (en) * | 2017-10-13 | 2018-01-09 | 嘉利特荏原泵业有限公司 | First-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump |
| CN109469624A (en) * | 2019-01-13 | 2019-03-15 | 嘉利特荏原泵业有限公司 | A kind of high revolving speed cartridge type centrifugal pump of high pressure |
| CN111810412A (en) * | 2020-08-10 | 2020-10-23 | 大连海密梯克泵业有限公司 | Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump |
| CN112727805A (en) * | 2021-02-04 | 2021-04-30 | 嘉利特荏原泵业有限公司 | Suction structure of double-shell radial subdivision multistage centrifugal pump and design method thereof |
| CN113417856A (en) * | 2021-08-02 | 2021-09-21 | 上海凯泉泵业（集团）有限公司 | High-pressure safety injection pump of water-water high-energy reactor third-generation nuclear power unit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB587696A (en) * | 1943-11-18 | 1947-05-02 | Goulds Pumps | Improvements in or relating to bearing assemblies |
| RU2361117C1 (en) * | 2007-12-24 | 2009-07-10 | Открытое акционерное общество "Пролетарский завод" | Multistage centrifugal pump |
| CN101509490A (en) * | 2009-04-03 | 2009-08-19 | 湖北三峡泵业有限公司 | Axial force self-balancing multiple stage centrifugal pump |
| CN201407180Y (en) * | 2009-05-12 | 2010-02-17 | 季裕成 | Symmetrical multistage pump |
| CN101749250A (en) * | 2008-11-30 | 2010-06-23 | 大连深蓝泵业有限公司 | First-stage double-absorption section self-balanced multiple-stage centrifugal pump |
| CN102878104A (en) * | 2012-10-25 | 2013-01-16 | 浙江佳力科技股份有限公司 | Axial force balanced structure of multilevel central opening type centrifugal pump |
| CN203214340U (en) * | 2013-04-24 | 2013-09-25 | 嘉利特荏原泵业有限公司 | Double-shell symmetric radially-split multistage centrifugal pump |
-
2013
- 2013-04-24 CN CN2013101452779A patent/CN103225624A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB587696A (en) * | 1943-11-18 | 1947-05-02 | Goulds Pumps | Improvements in or relating to bearing assemblies |
| RU2361117C1 (en) * | 2007-12-24 | 2009-07-10 | Открытое акционерное общество "Пролетарский завод" | Multistage centrifugal pump |
| CN101749250A (en) * | 2008-11-30 | 2010-06-23 | 大连深蓝泵业有限公司 | First-stage double-absorption section self-balanced multiple-stage centrifugal pump |
| CN101509490A (en) * | 2009-04-03 | 2009-08-19 | 湖北三峡泵业有限公司 | Axial force self-balancing multiple stage centrifugal pump |
| CN201407180Y (en) * | 2009-05-12 | 2010-02-17 | 季裕成 | Symmetrical multistage pump |
| CN102878104A (en) * | 2012-10-25 | 2013-01-16 | 浙江佳力科技股份有限公司 | Axial force balanced structure of multilevel central opening type centrifugal pump |
| CN203214340U (en) * | 2013-04-24 | 2013-09-25 | 嘉利特荏原泵业有限公司 | Double-shell symmetric radially-split multistage centrifugal pump |
Non-Patent Citations (1)
| Title |
|---|
| 望亭发电厂: "《汽轮机》", 31 July 2002, article "第十三章 辅助设备检修 第四节 水泵" * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511287A (en) * | 2013-10-23 | 2014-01-15 | 大连深蓝泵业有限公司 | Horizontal-type radial subdivision volute-type dual-cylinder pump |
| CN105697382A (en) * | 2014-11-28 | 2016-06-22 | 上海凯泉泵业（集团）有限公司 | Radially split double-shell multiple-stage centrifugal pump |
| CN104675751A (en) * | 2015-01-21 | 2015-06-03 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Centrifugal pump case |
| CN104675751B (en) * | 2015-01-21 | 2017-01-18 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Centrifugal pump case |
| CN105909526A (en) * | 2016-04-19 | 2016-08-31 | 湖南天奥星泵业有限公司 | Radial dissection two-end support type four-stage centrifugal pump |
| CN107542670A (en) * | 2017-09-27 | 2018-01-05 | 上海阿波罗机械股份有限公司 | Small pump and small pump pump group |
| CN107559206A (en) * | 2017-10-13 | 2018-01-09 | 嘉利特荏原泵业有限公司 | First-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump |
| CN109469624A (en) * | 2019-01-13 | 2019-03-15 | 嘉利特荏原泵业有限公司 | A kind of high revolving speed cartridge type centrifugal pump of high pressure |
| CN109469624B (en) * | 2019-01-13 | 2024-03-22 | 嘉利特荏原泵业有限公司 | High-pressure high-rotation-speed cylindrical centrifugal pump |
| CN111810412A (en) * | 2020-08-10 | 2020-10-23 | 大连海密梯克泵业有限公司 | Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump |
| CN111810412B (en) * | 2020-08-10 | 2024-04-16 | 大连海密梯克泵业有限公司 | Non-cantilever magnetic drive pump with homodromous impeller arrangement |
| CN112727805A (en) * | 2021-02-04 | 2021-04-30 | 嘉利特荏原泵业有限公司 | Suction structure of double-shell radial subdivision multistage centrifugal pump and design method thereof |
| CN113417856A (en) * | 2021-08-02 | 2021-09-21 | 上海凯泉泵业（集团）有限公司 | High-pressure safety injection pump of water-water high-energy reactor third-generation nuclear power unit |
| CN113417856B (en) * | 2021-08-02 | 2024-05-17 | 上海凯泉泵业（集团）有限公司 | High-pressure safety injection pump of third-generation nuclear power unit of water-water high-energy reactor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103225624A (en) | Double-casing symmetric type radial subdivision multiple-stage centrifugal pump | |
| CN103321748B (en) | Verticle gas turbine | |
| CN203214340U (en) | Double-shell symmetric radially-split multistage centrifugal pump | |
| EP2386763A2 (en) | Balancing piston | |
| CN102251991A (en) | Axial force balance device and method for shield pump | |
| CN105626540B (en) | Sectional multi-stage centrifugal pump | |
| RU2596411C2 (en) | Pump-turbine plant | |
| CN106438457A (en) | Half-opened impeller and low-flow super high-lift multiple-stage centrifugal pump with same | |
| CN108331760B (en) | Multistage deep sea mixed transportation pump | |
| CN108412776B (en) | Multistage deep sea mixed transportation pump adopting shaft sleeve structure | |
| CN203146392U (en) | Rotary shell pump with flow collecting pipe adopting center bearing at two ends | |
| CN203214404U (en) | Single-case symmetrical radially-split multistage centrifugal pump | |
| CN203348177U (en) | Horizontal type self-balancing multiple-stage centrifugal pump with high-cavitation-resistant performance | |
| CN205243860U (en) | Double suction helico centrifugal pump | |
| CN201090516Y (en) | Middle opening single suction multilevel diffuser centrifugal pump | |
| CN204061194U (en) | The radial subdivision centrifugal pump of two-stage single suction | |
| CN206874490U (en) | Axial subdivision three-level centrifugal pump | |
| CN103225623A (en) | Symmetric radial-splitting multistage centrifugal pump with single casing body | |
| CN102720696A (en) | Preheating water pump | |
| CN201148980Y (en) | Barrel body type single-suction multilevel impeller symmetrical diffuser-type centrifugal pump | |
| CN205401146U (en) | Festival segmentation multistage centrifugal pump | |
| CN108331761B (en) | Multistage deep sea mixed transportation pump with interstage clamping fastening | |
| CN103727124A (en) | Leakage-stopping thrust bearing | |
| CN203655646U (en) | Vertical condensate pump provided with balance device | |
| CN102828960A (en) | Double suction multistage horizontal split pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130731 |