CN206035832U - Open multistage centrifugal pump in double feed inlet double suction level - Google Patents

Open multistage centrifugal pump in double feed inlet double suction level Download PDF

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Publication number
CN206035832U
CN206035832U CN201620949837.5U CN201620949837U CN206035832U CN 206035832 U CN206035832 U CN 206035832U CN 201620949837 U CN201620949837 U CN 201620949837U CN 206035832 U CN206035832 U CN 206035832U
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China
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pump
impeller
shaft
double
feed inlet
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CN201620949837.5U
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Chinese (zh)
Inventor
陈芳芳
秦武
罗瑞祥
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CHANGSHA JIANENG GENERAL PUMP Co Ltd
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CHANGSHA JIANENG GENERAL PUMP Co Ltd
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Abstract

The utility model relates to a centrifugal pump field discloses open multistage centrifugal pump in the double feed inlet double suction level, which comprises a pump body, a pump cover, the pump shaft, the impeller, axle sleeve and bearing body part, go up pump cover and lower pump body along the middle subdivision of axial lead, the delivery side of pump lies in positive centre, two imports distribute at the pump both ends, the both ends import connects with middle export casts on lower pump body, the pump shaft is equipped with the axle sleeve outward, the symmetric distribution has two sets of impellers on the pump shaft, both ends chopped -off head and middle final stage are the double suction impeller, seal through the sealing ring between each part of centrifugal pump, the impeller couples through the parallel key with the pump shaft, drive the rotatory acting of impeller through the rotor. This structure adopts double feed inlet structure, and it is good that both ends be low -pressure area sealing performance, and operating efficiency is high, and simple structure, symmetry, is large -traffic, high -lift, a high -efficient novel multistage centrifugal pump structure product that hangs down cavitation and simple structure.

Description

Centrifugal multistage pump multiple centrifugal pump is driven in double feed inlet dual-sucking level
Technical field
This utility model is related to centrifugal pump field, particularly a kind of double feed inlet dual-sucking level middle open type centrifugal multistage pump multiple centrifugal pump.
Background technology
With flourishing for water conservancy market, there is increasing demand to high parameter, high reliability centrifugal multistage pump multiple centrifugal pump.It is existing Have that market charging pump description is limited, version is single, is affected by water pump efficiency and cavitation, opens in most of levels Pump is all single-stage double-suction structure, can improve cavitation, and design discharge is big, but lift is little;Sectional type or horizontal middle open type it is multistage from But heart pump has high-lift impeller inlet in one direction, in running, big axial force will be produced, need to be using balance The additional axial thrust balancing devices such as disk balancing drum, is easily worn in running, need to regularly replace bascule, causes operation effect Rate is reduced;The centrifugal multistage pump multiple centrifugal pump that single entry impeller is arranged symmetrically includes that sectional type and center-opening type multi-stage pump axial force can pass through itself Balance, but transition runner need to be set from the positive impeller of final stage to secondary inlet segment, complex structure, the multistage pump chopped-off head of big flow parameter Easily there is cavitation, cause material damage, produce noise and vibration;There is larger pressure reduction in multistage pump two ends, will to sealing property Ask high, be also easy to produce leakage, volumetric loss increase declines pump performance.
The content of the invention
For solving above-mentioned at least one problem that existing centrifugal multistage pump multiple centrifugal pump is present, the purpose of this utility model is offer one Centrifugal multistage pump multiple centrifugal pump is driven in planting big flow, high-lift, efficient low cavitation and the double feed inlet dual-sucking level of simple structure.
For achieving the above object, this utility model provides technical scheme below:
Double feed inlet dual-sucking level middle open type centrifugal multistage pump multiple centrifugal pump, including the pump housing, pump cover, pump shaft, impeller, axle sleeve and bearing body portion Part, upper pump cover and lower pump body are located at middle along subdivision in the middle of axial line, the outlet of pump, and two imports are distributed in pump two ends, two ends Import and central exit connect casting on lower pump body, and pump shaft is externally provided with axle sleeve, is symmetrically distributed with two groups of impellers, two entrances on pump shaft First-stage double suction impeller is provided with, outlet is provided with final stage double-entry impeller, is distributed between first-stage double suction impeller and final stage double-entry impeller The equal positive impeller of number formed objects and anti-impeller, positive and negative impeller are single suction, and back-to-back as axle with final stage double-entry impeller It is arranged symmetrically, impeller is coupled by flat key with pump shaft, is done work by the rotation of rotor impeller.
Preferably, pump shaft is coupled one end and is provided with shaft coupling with motor, is coupled using taper between shaft coupling and pump shaft.
Preferably, the suction chamber and pumping chamber runner between at different levels is along the symmetrical helical structure of axial line.
Preferably, the two ends pump housing is provided with axle envelope sealing ring with shaft room, is provided with head between first-stage double suction impeller and pump housing pump cover Level sealing ring, is secondary seal ring between positive impeller, anti-impeller and pump housing pump cover, is final stage between final stage double-entry impeller and pump housing pump cover Sealing ring, pump housing pump cover are cross-over bush with shaft room.
Preferably, pump housing two ends are provided with shaft sealer, and the shaft sealer adopts packing seal or traditional two part Mechanical seal or integrated mechanical sealing.
This utility model has the advantages that:(1)Using opening Multi-stage pump structure, flow in double feed inlet symmetric form level For the twice of same parameter list import multistage pump, lift can increase impeller as needed, and meeting big flow, high-lift parameter needs Ask;(2)Suction chamber and pumping chamber adopt helical structure, impeller, suction chamber, pumping chamber to adopt in interior hydraulic part runner Fluid emulation is designed, it is ensured that the high efficiency of water pump;Two ends import is double-entry impeller, and the flow into suction flange is divided into Two parts enter double-entry impeller import, reduce impeller inlet flow velocity, greatly improve the anti-cavitation performance of multistage pump;Double feed inlet is double Open Multi-stage pump structure during water suction is flat full symmetric, can Equilibrium axial force, while runner is symmetrical in 180 ° along axial line, Radial force is balanced well, is not susceptible to wear and tear in running and is vibrated, therefore, open many in the symmetrical level of double feed inlet double suction Level pump has efficient high cavitation performance, and stable, safe and reliable;(3)Using double feed inlet structure, general self-balancing is eliminated Transition runner needed for multistage pump, by axial line horizonally split, inlet and outlet connects casting on lower pump body to pump housing pump cover, and nothing is led The additional components such as leaf, stage casing, axial thrust balancing devices and balancing pipeline, pump configuration are simple, easy for installation.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing Accompanying drawing to be used needed for having technology description does simple introduction, it should be apparent that, drawings in the following description are the present invention Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis These accompanying drawings obtain other accompanying drawings.
Structural representation of the accompanying drawing 1 for this utility model embodiment.
In accompanying drawing, 1 is pump cover, and 2 is the pump housing, and 3 is pump shaft, and 4 is first-stage double suction impeller, and 5 is positive impeller, and 6 is final stage double suction Impeller, 7 is anti-impeller, and 8 is axle envelope sealing ring, and 9 is chopped-off head sealing ring, and 10 is secondary seal ring, and 11 is final stage sealing ring, and 12 are Cross-over bush, 13 is axle sleeve, and 14 is bearing body first part, and 15 is bearing body second part, and 16 is flat key, and 17 is shaft coupling.
Specific embodiment
Below by specific embodiment, the present invention is further illustrated.
A kind of double feed inlet dual-sucking level middle open type centrifugal multistage pump multiple centrifugal pump as shown in Figure 1, is with water outlet double-entry impeller as center line Two ends symmetrical structure, is made up of the pump housing, pump cover, axle, impeller, axle sleeve, sealing ring, axle end sealing device and bearing body part. , along subdivision in the middle of axial line, the outlet of pump is located at middle, and two imports are distributed in pump two ends, two ends import for upper pump cover and lower pump body Casting is connect on lower pump body with central exit, pump shaft is externally provided with axle sleeve, is symmetrically distributed with two groups of impellers on pump shaft, and two entrances are provided with First-stage double suction impeller, outlet are provided with final stage double-entry impeller, are distributed with number between first-stage double suction impeller and final stage double-entry impeller The equal positive impeller of formed objects and anti-impeller, positive and negative impeller are single suction, and symmetrical back-to-back as axle with final stage double-entry impeller Arrangement, impeller are coupled by flat key with pump shaft, are done work by the rotation of rotor impeller.
Wherein, axle is coupled one end and is provided with shaft coupling with motor, is coupled using taper between shaft coupling and pump shaft.
Axle sleeve is enclosed within main shaft outer ring to protect main shaft to prevent abrasion, between impeller and pump housing pump cover and axle sleeve and pump housing pump cover Be equipped with sealing ring, can protective effect can prevent again between level leak.By Flat dey joint between impeller and axle, axle two ends lead to Cross locking nut locked.Suction chamber and pumping chamber runner between at different levels is along the symmetrical helical structure of axial line.The pump housing two Hold as axle envelope, can be using various patterns such as packing seal, the mechanical seal of traditional two part and integrated mechanical sealings.
Specific implementation process is:Upper pump cover 1 is connect along subdivision in the middle of axial line, two ends import and central exit with lower pump body 2 Casting is on lower pump body.Rotor part is housed, by groups such as pump shaft 3, impeller, axle sleeve, sealing ring, locking nuts in the middle of the pump housing and pump cover Into.
Two groups of impellers are symmetrically distributed with pump shaft 3, and two entrances chopped-off head is double-entry impeller 4, final stage water outlet double-entry impeller 6 Between axle middle, first-stage double suction impeller 4 and final stage double-entry impeller 6 the equal positive impeller of uniform number formed objects 5 with Anti- impeller 6, positive and negative impeller are single suction, and are arranged symmetrically with final stage double-entry impeller back-to-back as axle.This impeller arrangement is protected During card pump operation, most axial forces mutually can be balanced, and residual axial force is undertaken by bearing.During pump operation, led to by conveying liquid Cross two imports and enter first-stage double suction impeller, secondary positive and negative impeller is entered after chopped-off head pumping chamber flows into second level suction chamber, Through symmetric helix shape pumping chamber and the follow-up afterflow of suction chamber to next stage, after finally flowing through final stage double-entry impeller, water is pressed in final stage Collect in room and flowed out by outlet.
Pump shaft 3 is externally provided with axle sleeve 13 to protect main shaft to prevent abrasion, impeller and pump housing pump cover and axle sleeve and pump housing pump cover Between be equipped with sealing ring, can protective effect can prevent again between level leak.The both end of which pump housing is sealed for axle envelope with shaft room It is secondary impeller and the pump housing pump covers such as chopped-off head sealing ring 9, positive impeller, anti-impeller between ring 8, first-stage double suction impeller 4 and pump housing pump cover Between be for being between secondary seal ring 10, final stage double-entry impeller 6 and pump housing pump cover between final stage sealing ring 11, pump housing pump cover and axle sleeve 13 Cross-over bush 12.Impeller is coupled by flat key 16 with pump shaft, rotates impeller rotation acting by rotor.
Bearing body part includes bearing body first part 14 and tail end bearing body second part 15, built with bearing, can play and prop up Support is acted on.Two ends axle envelope can be using various patterns such as packing seal, the mechanical seal of traditional two part and integrated mechanical sealings.Axle Couple one end with motor and be provided with shaft coupling 17, axle 3 is coupled using taper with shaft coupling 17, is easily installed and dismounting.
The above structured set single step dual-sucking level middle-opening pump big flow, high cavitation performance, be installed on it is easy to maintenance;It is multistage Centrifugal pump lift is high;Self-balanced multiple-stage centrifugal pump axial force can autobalance it is each without additional equilibrium device, good operation stability etc. Plant the advantage of pump;Double feed inlet structure two ends are adopted for low-pressure area good seal performance, operational efficiency is high, and it is simple structure, symmetrical, be A kind of big flow, high-lift, efficiently low cavitation and simple structure novel multistage centrifugal pump infrastructure product.
Specific embodiment used herein is set forth to the principle of the present invention and embodiment, above example Illustrate that being only intended to help understands the method for the present invention and its core concept.The above is only the side of being preferable to carry out of the present invention Formula, it is noted that due to the finiteness of literal expression, and objectively there is unlimited concrete structure, for the art For those of ordinary skill, under the premise without departing from the principles of the invention, some improvement, retouching or change can also be made, Above-mentioned technical characteristic can be combined by rights;These improve retouching, change or combine, or it is not improved will send out Bright design and technical scheme directly apply to other occasions, are regarded as protection scope of the present invention.

Claims (5)

1. double feed inlet dual-sucking level middle open type centrifugal multistage pump multiple centrifugal pump, including the pump housing, pump cover, pump shaft, impeller, axle sleeve and bearing body portion Part, it is characterised in that, along subdivision in the middle of axial line, the outlet of pump is located at middle, and two imports are distributed in for upper pump cover and lower pump body Pump two ends, two ends import and central exit connect casting on lower pump body, and pump shaft is externally provided with axle sleeve, is symmetrically distributed with two groups of leaves on pump shaft Wheel, two entrances are provided with first-stage double suction impeller, and outlet is provided with final stage double-entry impeller, first-stage double suction impeller and final stage double-entry impeller it Between be distributed with the equal positive impeller of number formed objects and anti-impeller, positive and negative impeller is single suction, and with final stage double-entry impeller It is arranged symmetrically for center line back-to-back, impeller is coupled by flat key with pump shaft, is done work by the rotation of rotor impeller.
2. double feed inlet dual-sucking level middle open type centrifugal multistage pump multiple centrifugal pump according to claim 1, it is characterised in that pump shaft and motor Connection one end is provided with shaft coupling, is coupled using taper between shaft coupling and pump shaft.
3. double feed inlet dual-sucking level middle open type centrifugal multistage pump multiple centrifugal pump according to claim 1, it is characterised in that between at different levels Suction chamber and pumping chamber runner are along the symmetrical helical structure of axial line.
4. double feed inlet dual-sucking level middle open type centrifugal multistage pump multiple centrifugal pump according to claim 2, it is characterised in that the two ends pump housing with Shaft room is provided with axle envelope sealing ring, is provided with chopped-off head sealing ring, positive impeller, anti-impeller and pump between first-stage double suction impeller and pump housing pump cover It is secondary seal ring between body pump cover, is final stage sealing ring between final stage double-entry impeller and pump housing pump cover, pump housing pump cover with shaft room is Cross-over bush.
5. double feed inlet dual-sucking level middle open type centrifugal multistage pump multiple centrifugal pump according to claim 1, it is characterised in that pump housing two ends set There is shaft sealer, the shaft sealer adopts packing seal or the mechanical seal of traditional two part or integrated mechanical sealing.
CN201620949837.5U 2016-08-26 2016-08-26 Open multistage centrifugal pump in double feed inlet double suction level Active CN206035832U (en)

Priority Applications (1)

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CN201620949837.5U CN206035832U (en) 2016-08-26 2016-08-26 Open multistage centrifugal pump in double feed inlet double suction level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620949837.5U CN206035832U (en) 2016-08-26 2016-08-26 Open multistage centrifugal pump in double feed inlet double suction level

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109707669A (en) * 2018-11-29 2019-05-03 长沙佳能通用泵业有限公司 A kind of double feed inlet, the efficient inlet segment of double helical form
US20210363995A1 (en) * 2020-05-20 2021-11-25 Sulzer Management Ag Multistage centrifugal pump for conveying a fluid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109707669A (en) * 2018-11-29 2019-05-03 长沙佳能通用泵业有限公司 A kind of double feed inlet, the efficient inlet segment of double helical form
US20210363995A1 (en) * 2020-05-20 2021-11-25 Sulzer Management Ag Multistage centrifugal pump for conveying a fluid
US11649825B2 (en) * 2020-05-20 2023-05-16 Sulzer Management Ag Multistage centrifugal pump for conveying a fluid

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