CN208587298U - Sectional type multi-stage pump - Google Patents

Sectional type multi-stage pump Download PDF

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Publication number
CN208587298U
CN208587298U CN201821265412.8U CN201821265412U CN208587298U CN 208587298 U CN208587298 U CN 208587298U CN 201821265412 U CN201821265412 U CN 201821265412U CN 208587298 U CN208587298 U CN 208587298U
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China
Prior art keywords
guide vane
type multi
sectional type
impeller
middle section
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CN201821265412.8U
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Chinese (zh)
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陈建珍
邹礼生
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Andritz China Ltd
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Andritz China Ltd
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Abstract

The utility model relates to a kind of sectional type multi-stage pumps, at least one middle section of the sectional type multi-stage pump includes: impeller, the outer barrel and return guide vane blade being integrally cast, and the guide vane being provided separately, wherein, in the inside in each middle section, the guide vane, the outer barrel and return guide vane and the impeller are sequentially arranged on the flow direction of the entrance from the sectional type multi-stage pump to outlet, wherein, the maximum axial extension size of the return guide vane blade upstream is fully located at the outer barrel within the maximum axial extension size of the direction.

Description

Sectional type multi-stage pump
Technical field
The utility model relates to multistage pump technical fields, tie more particularly to a kind of middle section of the sectional type multi-stage pump of optimization Structure.
Background technique
Sectional type multi-stage pump is a kind of universal machine product, its advantage is that range of flow is big, lift is high, application range Very wide, main application fields include supplying water, irrigating, industrial application, hot and cold water circulation, fire-fighting, boiler feedwater, sea water desalination and increasing The water supply etc. of pressure device.
Under the historical background of current energy-saving and emission-reduction, the operational efficiency for improving pump becomes the urgent need in market, because of section The middle section of segmentation multistage pump in a multistage pump often assembled in series have it is several or even more than ten, so middle section structure is in segment Seem particularly critical in formula multistage pump, and influences the key components and parts of the operational efficiency of whole pump.
Fig. 1 is traditional Multi-stage pump structure schematic diagram, as shown in Figure 1, traditional Multi-stage pump structure mainly include axis 101, Entrance 102, outlet section 104, shaft coupling 105, machine sealing chamber 106, bearing holder (housing, cover) 107, bearing 108, sealing 109, is led at middle section 103 Leaf 110, impeller 111, blade 112, gland 113, positioning ring 114.Traditional middle section structure is only used as a kind of simple interconnecting piece Part, and the installation cavity as hydraulic part, guide vane blade and return guide vane blade are combined into a part (hereinafter referred to as guide vane), Outer barrel is as an installation cavity, and by guide vane and impeller, shell wear ring and bushing are mounted on inside, wherein guide vane and outer Cylinder directly passes through processing face contact and forms medium runner, and the final stage guide vane after the removal of return guide vane blade processing is mounted on outlet In section cavity.
Since traditional middle section structure is only used as a kind of simple connecting component, and the installation cavity as hydraulic part, It is complicated to eventually lead to installation, is easy to cause hydraulic loss inside middle section, to impact the operational efficiency of whole pump, separately Outside, since middle section is general purpose accessory, thus in conventional design, all middle sections are all subjected to the outlet pressure of pump under normal conditions Power causes whole pump weight to greatly increase.
Summary of the invention
Defect against the above technical problems, the purpose of this utility model is to provide a kind of sectional type multi-stage pumps, especially It is that the middle section structure optimized improves operational efficiency, while reducing part so that sectional type multi-stage pump reduces installation difficulty Cost.
According to sectional type multi-stage pump provided by the utility model, at least one middle section of the sectional type multi-stage pump includes: Impeller, the outer barrel being integrally cast and return guide vane blade, and the guide vane being provided separately, wherein in each middle section Inside, the guide vane, the outer cylinder are sequentially arranged on the flow direction of the entrance from the sectional type multi-stage pump to outlet Body and return guide vane and the impeller, wherein the maximum axial extension size of the return guide vane blade upstream is fully located at institute Outer barrel is stated within the maximum axial extension size of the direction.
The maximum axial extension size of return guide vane blade upstream is fully located at the outer barrel in the maximum axis of the direction It is meant that return guide vane can't stretch out the outer barrel and be connected with previous stage middle section within to extension size.It is practical new at this In the design of type, return guide vane is only connected with the same level middle section, and guide vane no longer needs simultaneously and the machined surface between entrance and middle section Cooperation, this avoids the accumulation of machined surface region material and thus caused by waste of material, thus saved material, alleviated casting Weight.In addition, since guide vane is provided separately, thus stretch out outer barrel not on axially extending direction in return guide vane and prop up Support previous stage middle section or in the case where being connected with previous stage middle section, guide vane easily can individually be arranged in impeller later without Consider that return guide vane whether there is.
According to a kind of preferred implementing form of sectional type multi-stage pump provided by the utility model, return guide vane blade is in middle section Seamless runner is formed inside outer barrel.
According to a kind of preferred implementing form of sectional type multi-stage pump provided by the utility model, in the outer barrel and impeller Wear ring and lining are respectively disposed between entrance excircle surface side, between the inner peripheral surface of return guide vane blade and impeller hub outer peripheral surface Set.Wear ring and bushing are all mounted in middle section, i.e., process in the same side of the same part, this advantageously ensures that processing essence Degree.
According to a kind of preferred implementing form of sectional type multi-stage pump provided by the utility model, the middle section is designed and pacifies Dress is adjustable to make it surround the Angle Position of impeller rotating shaft line.By adjusting the peace in each middle section when this is conducive to install Angle is filled to adjust the angle of guide vane blade, to reduce the influence of water hammer effect, reduces the vibration of pump, to the stable of pump Property and service life are all improved.
According to a kind of preferred implementing form of sectional type multi-stage pump provided by the utility model, in the sectional type multi-stage pump Impeller towards the sectional multistage pump discharge side be disposed with the guide vane being provided separately, the guide vane and the sectional type Guide vane having the same structure of the multistage pump in the middle sections at different levels before impeller.
The middle section structure of sectional type multi-stage pump provided by the utility model, the middle section is by Fluid Mechanics Computation optimization The Hydraulic Design, hydraulic structure divide rationally, after finite element analysis strength check, meet the requirement of strength design in structure.
The middle section reduces installation difficulty to cost of parts is reduced, and improves production efficiency, especially improves the operation effect of pump Rate has obvious action, and by the optimization design in the middle section of sectional type multi-stage pump, the operational efficiency of whole pump is than similar production of the same trade Product improve 4%~6%.
Detailed description of the invention
Fig. 1 is traditional Multi-stage pump structure schematic diagram;
Fig. 2 is the structural schematic diagram of the sectional type multi-stage pump of the utility model;
Fig. 3 is the guide vane and return guide vane schematic diagram of the sectional type multi-stage pump of the utility model;
Fig. 4 is the middle section schematic diagram of internal structure of the sectional type multi-stage pump of the utility model;
Specific embodiment
The sectional type multi-stage pump of the utility model is described in detail with reference to the accompanying drawing, it is emphasized that, attached drawing It is only used for the explanation to the utility model with embodiment, should not be understood as limiting the present invention.
Fig. 2 is the structural schematic diagram of the sectional type multi-stage pump of the utility model, as shown in Fig. 2, the segment of the utility model Formula multistage pump is usually by entrance 1, middle section 2, guide vane 3, impeller 4, outlet section 5, machine sealing chamber 6, machine sealed cover 7, bearing housing 8, axis Pressure cap 9, positioning ring 10, bearing holder (housing, cover) 11, bearing 12, axle sleeve 13, balancing drum 14, balance bush cavity 15, balance bush 16, shell The parts compositions such as body wear ring 17, bushing 18, machine envelope axle sleeve 19, mechanical seal 20, bearing 21 and axis 22.
Wherein, the middle section of sectional type multi-stage pump is optimized in the utility model, below to the optimization structure in middle section into Row specific explanations.
Fig. 3 is the guide vane and return guide vane schematic diagram of the sectional type multi-stage pump of the utility model, as shown in figure 3, by 3 He of guide vane After return guide vane 301 discretely designs, guide vane 3 and return guide vane 301 become simple general purpose accessory, ensure that the same of hydraulic performance When also simplify casting difficulty.
Fig. 4 is the middle section schematic diagram of internal structure of the sectional type multi-stage pump of the utility model, as shown in figure 4, sectional type is more At least one middle section 2 of grade pump includes: impeller 401, the outer barrel 402 and return guide vane blade 403, Yi Jidan being integrally cast The guide vane 3 solely provided, wherein in the inside in each middle section 2, on the flow direction of the entrance from sectional type multi-stage pump to outlet It is sequentially arranged guide vane 3, outer barrel 402 and return guide vane 301 and impeller 401, wherein the maximum of return guide vane blade 403 upstream Axially extending size is fully located at outer barrel 402 within the maximum axial extension size of the direction.
Hydraulic structure inside middle section 2, the waterpower of guide vane 3, return guide vane 301 and entrance 1, impeller 401 and outlet section 5 The optimization of overall calculation flow dynamics analysis has been carried out, has ensured that the optimization the Hydraulic Design of whole pump.
The 403 integration casting of outer barrel 402 and return guide vane blade, reinforces the internal junction in middle section 2 using return guide vane blade 403 Structure, also, after through finite Element Intensity Analysis, optimize structure design.
Outer barrel 402 and 403 integrated design of return guide vane blade reduce the weight in middle section 2, because of sectional type multi-stage pump Middle section quantity and weight it is shared in whole pump specific gravity it is very big, so as to substantially reduce the weight of whole pump.
Return guide vane blade 403 forms seamless runner inside the outer barrel 402 in middle section, inside cylinder 402, hydraulic flow Closing is realized by casting in road, does not need cover board used in traditional design, also avoids waterpower while reducing processing There is flow-disturbing inside runner and loss in efficiency occurs.
Between 401 entrance excircle surface side of the outer barrel 402 and impeller, the inner peripheral surface and leaf of return guide vane blade 403 It takes turns and is respectively disposed with wear ring 404 and bushing 405 between 401 hub periphery faces, the wear ring 404 and bushing 405 are all installed In middle section 2, i.e., is processed in the same side of the same part, advantageously ensure that machining accuracy, it is ensured that impeller 401 and shell (enter Mouthful section 1 and middle section 2) between gap reach design requirement, the gap size between wear ring 404 and bushing 405 and impeller 401 There is significant impact to the way and axial force, thus the design facilitates leakage between reducing grade and improves the efficiency pumped, together When also reduce the axial force of rotor.
The Angle Position that middle section 2 is designed and is installed as that it is made to surround 401 rotation axis of impeller is adjustable, because integrated The design of change, when installation, the angle of guide vane blade can be adjusted by adjusting the setting angle (exterior visual) in each middle section 2, from And the influence of water hammer effect is reduced, reduce the vibration of pump, the operation stability and service life to pump are all improved.
What being disposed with towards the sectional multistage pump discharge side of the impeller of sectional type multi-stage pump was provided separately leads The guide vane structure having the same of leaf, the guide vane and sectional type multi-stage pump in the middle sections at different levels before impeller, guide vane 3 pass through After crossing structure optimization, become a simple general purpose accessory, is mounted between two middle sections 2 or between middle section 2 and outlet section 5 (final stage guide vane), i.e. final stage guide vane are not required to otherwise designed, decrease the quantity of part while simplifying structure.
The utility model proposes the middle section design optimization internal structure in middle section, simplify the mounting means of part, drop The low processing cost of part, improves production efficiency, compared with traditional design scheme, the utility model proposes middle section design The operational efficiency of pump is improved, in one of them embodiment, the operating condition of pump is flow 420m3/ h, lift 330m, Shaft power 420.4kw, NPSH 3.5m, operational efficiency reach 89.5%, compared to similar product improve 5% efficiency, single pump, Operation can reduce energy consumption 504Kw for 24 hours daily, annual to run by 360 days, can save the electricity cost of 22.9 ten thousand RMB, realize Considerable economic benefit.
The preferred embodiment of the utility model is described above, but the spirit and scope of the utility model are not limited to here Disclosed particular content.Those skilled in the art can it is according to the present utility model introduction and make more embodiments and Using these embodiments and application are all in the spirit and scope of the utility model.The spirit and scope of the utility model are not It is limited, and is defined by the claims by specific embodiment.
Reference signs list
1 entrance
2 middle sections
3 guide vanes
4 impellers
5 outlet sections
6 machine sealing chambers
7 machine sealed covers
8 bearing housings
9 bearing glands
10 positioning rings
11 bearing holder (housing, cover)s
12 bearings
13 axle sleeves
14 balancing drums
15 balance bush cavitys
16 balance bushes
17 shell wear rings
18 bushings
19 machines seal axle sleeve
20 mechanical seals
21 bearings
22 axis
301 return guide vanes
401 impellers
402 outer barreies
403 return guide vane blades
404 wear rings
405 bushings

Claims (5)

1. a kind of sectional type multi-stage pump, which is characterized in that at least one middle section of the sectional type multi-stage pump includes:
Impeller,
The outer barrel and return guide vane blade being integrally cast, and
The guide vane being provided separately,
Wherein, in the inside in each middle section, on the flow direction of the entrance from the sectional type multi-stage pump to outlet according to It is secondary to arrange the guide vane, the outer barrel and return guide vane and the impeller,
Wherein, the maximum axial extension size of the return guide vane blade upstream be fully located at the outer barrel the direction most Within big axially extending size.
2. sectional type multi-stage pump according to claim 1, which is characterized in that return guide vane blade is inside the outer barrel in middle section Form seamless runner.
3. sectional type multi-stage pump according to claim 1, which is characterized in that in the outer barrel and impeller eye excircle Wear ring and bushing are respectively disposed between surface side, between the inner peripheral surface of return guide vane blade and impeller hub outer peripheral surface.
4. sectional type multi-stage pump according to any one of claim 1 to 3, which is characterized in that the middle section be designed and The Angle Position for being installed as that it is made to surround impeller rotating shaft line is adjustable.
5. sectional type multi-stage pump according to any one of claim 1 to 3, which is characterized in that in the sectional multistage The impeller of pump is disposed with the guide vane being provided separately towards the sectional multistage pump discharge side, the guide vane and the segment Guide vane having the same structure of the formula multistage pump in the middle sections at different levels before impeller.
CN201821265412.8U 2018-08-07 2018-08-07 Sectional type multi-stage pump Active CN208587298U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821265412.8U CN208587298U (en) 2018-08-07 2018-08-07 Sectional type multi-stage pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821265412.8U CN208587298U (en) 2018-08-07 2018-08-07 Sectional type multi-stage pump

Publications (1)

Publication Number Publication Date
CN208587298U true CN208587298U (en) 2019-03-08

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Application Number Title Priority Date Filing Date
CN201821265412.8U Active CN208587298U (en) 2018-08-07 2018-08-07 Sectional type multi-stage pump

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108730196A (en) * 2018-08-07 2018-11-02 安德里茨(中国)有限公司 Sectional type multi-stage pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108730196A (en) * 2018-08-07 2018-11-02 安德里茨(中国)有限公司 Sectional type multi-stage pump

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