CN203214340U - Double-shell symmetric radially-split multistage centrifugal pump - Google Patents

Double-shell symmetric radially-split multistage centrifugal pump Download PDF

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Publication number
CN203214340U
CN203214340U CN201320213901XU CN201320213901U CN203214340U CN 203214340 U CN203214340 U CN 203214340U CN 201320213901X U CN201320213901X U CN 201320213901XU CN 201320213901 U CN201320213901 U CN 201320213901U CN 203214340 U CN203214340 U CN 203214340U
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China
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pump
centrifugal pump
multistage centrifugal
bearing
radially
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CN201320213901XU
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曲景田
曹军伟
李林锋
杨顺银
聂小林
涂必成
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Ebara Great Pumps Co Ltd
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Ebara Great Pumps Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency

Abstract

The utility model provides a double-shell symmetric radially-split multistage centrifugal pump. The double-shell symmetric radially-split multistage centrifugal pump comprises an outer shell and a core pack component, wherein the core pack component comprises a pump shaft, an inner shell and two impeller components arranged inside the inner shell, each impeller component comprises a plurality of impellers and a plurality of guide blades which are sleeved on the pump shaft, the two impeller components rotate oppositely and are distributed on the pumping-in side and the pumping-out side of the pump in a back-to-back manner. Since the two impeller components are distributed in the back-to-back manner, self-balance of axial force between the impeller components can be realized; the double-shell symmetric radially-split multistage centrifugal pump has the advantages of reasonable and reliable structure, efficiency and energy conservation, and can be widely applied to industries of petroleum, petrochemical engineering, chemical engineering, electric power, smelting and the like.

Description

Bivalve body symmetric type is the subdivision multistage centrifugal pump radially
Technical field
The utility model belongs to the centrifugal pump field, is 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 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, can produce axial force at impeller, particularly the impeller number of multistage centrifugal pump is more many, and it is more serious that its axial force produces.
The model utility content
The utility model is at above-mentioned the deficiencies in the prior art, and radially subdivision multistage centrifugal pump of a kind of bivalve body symmetric type that can realize axial force self-balancing is provided.
The utility model is achieved by the following technical solution:
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.
Further setting of the present utility model 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.
Further setting of the present utility model 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.
Further setting of the present utility model 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.
Further setting of the present utility model is that described final stage stage casing is provided with tap structure.
Further setting of the present utility model 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.
Further setting of the present utility model 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.
Further setting of the present utility model is, adopts O RunddichtringO static seal between described final stage stage casing and the middle deflector, and both connect by straight pin.
Further setting of the present utility model is that described core pack assembly links together by a long threaded rod and nut.
Bivalve described in the utility model 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 arrange 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 from relatively rotating by straight pin; Compared with prior art, the utility model non-bolt connects, the structure stress requirement in the time of can better meeting pump operation.
8. the long threaded rod that adopt to lengthen and nut connect into the core bag as a whole, and namely 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 described in the utility model 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 utility model is described in more detail below in conjunction with the drawings and specific embodiments.
Bivalve described in the utility model 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 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 namely 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 line horizontal support centered by the supporting way of frame 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 sliding bearing.Thrust bearing is one 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.
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 (as shown in Figure 4) in the endoporus of described middle deflector lining 11 and balance bush 16.
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 from relatively rotating 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 and the nut that lengthen 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 described in the utility model 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 most end one-level, 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 utility model, and all equivalent variations of doing according to the utility model claim all should belong to protection domain of the present utility model.

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 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. body symmetric type subdivision multistage centrifugal pump radially in bivalve according to claim 1 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 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. body symmetric type subdivision multistage centrifugal pump radially in bivalve according to claim 4 is characterized in that described final stage stage casing (18) is provided with tap structure.
6. bivalve according to claim 4 body symmetric type 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. body symmetric type subdivision multistage centrifugal pump radially in bivalve according to claim 1 is characterized in that 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.
8. body symmetric type subdivision multistage centrifugal pump radially in bivalve according to claim 4 is characterized in that adopt O RunddichtringO static seal between described final stage stage casing (18) and the middle deflector (10), both connect by straight pin.
9. body symmetric type subdivision multistage centrifugal pump radially in bivalve according to claim 1 is characterized in that described core pack assembly links together by a long threaded rod (20) and nut.
CN201320213901XU 2013-04-24 2013-04-24 Double-shell symmetric radially-split multistage centrifugal pump Active CN203214340U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103225624A (en) * 2013-04-24 2013-07-31 嘉利特荏原泵业有限公司 Double-casing symmetric type radial subdivision multiple-stage centrifugal pump
CN104154027A (en) * 2014-08-08 2014-11-19 江苏海狮泵业制造有限公司 Nuclear power chemical vessel make-up pump with high hydraulic component symmetric arrangement reliability
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
CN107850075A (en) * 2015-08-10 2018-03-27 诺沃皮尼奥内技术股份有限公司 Centrifugal pump
RU203322U1 (en) * 2020-11-30 2021-03-31 Акционерное общество "ГМС Ливгидромаш" Centrifugal double-casing multistage pump with opposite arrangement of groups of impellers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103225624A (en) * 2013-04-24 2013-07-31 嘉利特荏原泵业有限公司 Double-casing symmetric type radial subdivision multiple-stage centrifugal pump
CN104154027A (en) * 2014-08-08 2014-11-19 江苏海狮泵业制造有限公司 Nuclear power chemical vessel make-up pump with high hydraulic component symmetric arrangement reliability
CN107850075A (en) * 2015-08-10 2018-03-27 诺沃皮尼奥内技术股份有限公司 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
RU203322U1 (en) * 2020-11-30 2021-03-31 Акционерное общество "ГМС Ливгидромаш" Centrifugal double-casing multistage pump with opposite arrangement of groups of impellers

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