CN205937140U - Double feed inlet self -balancing multistage centrifugal pump of chopped -off head double suction impeller - Google Patents
Double feed inlet self -balancing multistage centrifugal pump of chopped -off head double suction impeller Download PDFInfo
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- CN205937140U CN205937140U CN201620939227.7U CN201620939227U CN205937140U CN 205937140 U CN205937140 U CN 205937140U CN 201620939227 U CN201620939227 U CN 201620939227U CN 205937140 U CN205937140 U CN 205937140U
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Abstract
The utility model discloses a double feed inlet self -balancing multistage centrifugal pump of chopped -off head double suction impeller, including the casing, the casing both ends constitute the double feed inlet for the import, and the casing middle part is the export, and the exit is equipped with the impeller, and the impeller in exit is the double suction impeller, is equipped with the impeller in the casing between two imports and export, impeller between two imports and the export is multistage and the both sides of symmetrical arrangement at the double suction impeller in exit, the impeller that corresponds with the import department is the chopped -off head impeller, the chopped -off head impeller is the double suction impeller, and all the other grade impellers are single -suction impeller. The double suction impeller of this structure chopped -off head department under same conditions has higher resistant cavitation performance than single -suction impeller.
Description
Technical field
This utility model is related to self-balanced multiple-stage centrifugal pump and in particular to a kind of double feed inlet self-balancing of first-stage double suction impeller
Centrifugal multistage pump multiple centrifugal pump, belongs to centrifugation pump technical field.
Background technology
Existing Double-inlet self-balance multiple-stage centrifugal is the import that pump two ends are respectively pump（Double feed inlet）And by single suction leaf
Wheel is arranged symmetrically（In addition to rotation direction difference, remaining structure is identical and is arranged symmetrically for the single-stage impeller at requirement two ends）, middle be pump
Outlet and be made up of double-entry impeller；Double-entry impeller housing in the middle of pump needs to be designed to scroll casing type, the single-stage impeller at two ends
Housing both may be designed to guide-vane（As shown in Figure 1）May be designed as volute type structure（As shown in Figure 2）.This structure pump has knot
Structure simply and readily casts the feature of processing, wants though solving conventional pumps and cannot realizing high-lift parameter conveying in larger flow
Ask, but when the slightly not enough medium of pump inlet pressure easily vaporizes, the pump two ends first order（Chopped-off head）Single-suction (single-in let) impeller will cavitation, one
As cavitation can increase vibration and noise during pump operation, reduce the life-span of pump, the shape that pump cannot use during serious cavitation erosion, can be caused
Condition.This is accomplished by changing or improve the Double-inlet self-balance multiple-stage centrifugal two ends first order by structure（Chopped-off head）Impeller resistance to
Cavitation performance just can ensure that operational reliability in the case of the slightly not enough medium of inlet pressure easily vaporizes for the pump and the use of pump
Life-span.Suck the net positive suction head requiring only have reduction double-entry pump in order to reach user, and fixed in revolution speed and flow parameter
In the case of, itself can only improve in pump configuration, one of effectively method is to increase induction at first stage impeller
Wheel, but it is limited to increase inducer raising pump suction performance at first stage impeller.
Utility model content
For deficiencies of the prior art, the purpose of this utility model is a kind of the double of first-stage double suction impeller of offer
Import self-balanced multiple-stage centrifugal pump, this Double-inlet self-balance multiple-stage centrifugal has higher resistance to pitting under the same conditions
Energy.
For solving above-mentioned technical problem, this utility model employs technical scheme below：
The Double-inlet self-balance multiple-stage centrifugal of first-stage double suction impeller, including housing and rotor, housing two ends are import structure
Become double feed inlet, housing central section is outlet, the rotor in exit is provided with impeller, and the impeller in exit is double-entry impeller, enters two
The rotor in housing between mouth and outlet is provided with impeller；Impeller between two inlet and outlets is multistage and is arranged symmetrically in
The both sides of the double-entry impeller in exit；Impeller corresponding with entrance be first stage impeller it is characterised in that：Described first stage impeller is
Double-entry impeller, remaining grade of impeller is single-suction (single-in let) impeller.
Described Double-inlet self-balance multiple-stage centrifugal is sectional type Double-inlet self-balance multiple-stage centrifugal, or is scroll casing type
Double-inlet self-balance multiple-stage centrifugal.
Compared with prior art, this utility model has the advantages that：
This structure Double-inlet self-balance multiple-stage centrifugal is the double-entry pump two ends first order（Chopped-off head）Single-suction (single-in let) impeller is replaced with
Double-entry impeller, so former by the pump first order（Chopped-off head）The flow of single-suction (single-in let) impeller just is divided into two by double-entry impeller, medium
By the first order（Chopped-off head）The inlet velocity of impeller accordingly reduces, and reduction is followed in the hydraulic loss of flow of fluid after flow velocity reduction,
The pressure medium of pump inlet deducts after hydraulic loss just remaining more surplus by contrast, therefore double suction under the same conditions
Impeller has higher resistance to cavitation performance than single-suction (single-in let) impeller.
Brief description
Fig. 1 is existing chopped-off head single-suction (single-in let) impeller sectional type Double-inlet self-balance multiple-stage centrifugal structural representation.
Fig. 2 is existing chopped-off head single-suction (single-in let) impeller scroll casing type Double-inlet self-balance multiple-stage centrifugal structural representation.
Fig. 3 is this utility model first-stage double suction impeller sectional type Double-inlet self-balance multiple-stage centrifugal structural representation.
Fig. 4 is this utility model first-stage double suction impeller scroll casing type Double-inlet self-balance multiple-stage centrifugal structural representation.
Specific embodiment
The Double-inlet self-balance multiple-stage centrifugal of this utility model first-stage double suction impeller, including housing and rotor, housing two
Hold and constitute double feed inlet for import, housing central section is outlet.The rotor in exit is provided with impeller, and the impeller in exit is double suction leaf
Wheel.Rotor in housing between two inlet and outlets is provided with impeller；Impeller between two inlet and outlets be multistage and
It is arranged symmetrically in the both sides of the double-entry impeller in exit.Impeller corresponding with entrance is first stage impeller, and described first stage impeller is
Double-entry impeller, remaining grade of impeller is single-suction (single-in let) impeller.
This utility model Double-inlet self-balance multiple-stage centrifugal version is horizontal, and two ends are the import of pump and two ends are entered
The first order of mouth（Chopped-off head）Impeller at impeller and central exit adopts double-entry impeller.This structure double feed inlet self-balanced multiple-stage is centrifuged
Pump include two ends pump body structure be stator, middle water outlet housing be spiral case sectional type first-stage double-absorption double feed inlet self-balanced multiple-stage from
Heart pump and pump body structure are all the first-stage double-absorption Double-inlet self-balance multiple-stage centrifugal of spiral case.Below in conjunction with the accompanying drawings and be embodied as
Mode illustrates to two kinds of centrifugal pumps respectively.
Fig. 3 is this utility model first-stage double suction impeller sectional type Double-inlet self-balance multiple-stage centrifugal structural representation：Knot
Structure is identical but single-suction (single-in let) impeller 2 that rotation direction is different is arranged symmetrically in the two ends of exit double-entry impeller 6, with two first-stage double-absorption leaves
Take turns the two ends import that 7 supporting two inlet segments 1 constitute sectional type Double-inlet self-balance multiple-stage centrifugal, Scroll water exit end 5 structure
Become the central exit of Double-inlet self-balance multiple-stage centrifugal.Fill respectively with respective place side single-suction (single-in let) impeller rotation direction identical stator 3
Constitute sectional type Double-inlet self-balance multiple-stage centrifugal in outlet both sides stage casing 4 and with two inlet segments 1, Scroll water exit end 5
Housing.Pump pumped (conveying) medium enters from two ends inlet segment simultaneously, first passes through first-stage double suction impeller 7 and enters back into single suction after being pressurizeed
Impeller 2, double-entry impeller 6 at the laggard inlet/outlet that then pressurizes step by step, the outlet of pump is finally entered from Scroll water exit end 5.Due to
Except first-stage double suction impeller 7 outer two ends single-stage impeller 2 is arranged symmetrically（Two ends single-suction (single-in let) impeller series can increase and decrease simultaneously, in figure impeller level
Number is only for illustrating）, the axial force automatic balancing that this impeller of pump produces, simultaneously because do not have the sealing dress in balancing pipeline and height area
Put, also just decrease the leakage of pump, improve efficiency.This radial direction subdivision bay structural pump not only achieves high-lift in big flow
The medium conveying of parameter, and solve in pump inlet uniform pressure and use under parameter, because pump inlet pressure is slightly not enough
Pump two ends first order when medium easily vaporizes（Chopped-off head）Single-suction (single-in let) impeller will cavitation problem, improve the scope of application of pump.
Fig. 4 is this utility model first-stage double suction impeller scroll casing type Double-inlet self-balance multiple-stage centrifugal structural representation：Water
Flat axial subdivision has the pump housing 2 of scroll casing type runner, pump cover 3 constitutes the housing of scroll casing type Double-inlet self-balance multiple-stage centrifugal,
Housing two ends are respectively kept with import and constitute the outlet for pump in the middle of double feed inlet, housing.Structure is identical but list that rotation direction is different
Phyllidium wheel 4 is arranged symmetrically in the two ends of exit double-entry impeller 5.Pump pumped (conveying) medium first passes through from the pump housing 2, pump cover 3 two ends simultaneously
Chopped-off head（The first order）Double-entry impeller 6 simultaneously enters back into double suction leaf at single-suction (single-in let) impeller 2 the laggard inlet/outlet that pressurizes step by step after being pressurizeed
Wheel 5, the finally outlet of the runner entrance pump in the middle of the pump housing 2, pump cover 3.Pumped (conveying) medium due to pump two ends entrance does not also have
Pressurizeed by impeller, pressure is relatively low it is ensured that the axle envelope 1 at this seals effectiveness, and this pump does not have balancing pipeline and height area simultaneously
Sealing device, also just decrease the leakage of pump, improve efficiency.In addition pump two ends single-stage impeller 4 is arranged symmetrically（Impeller progression
Can increase and decrease, the impeller progression of in figure is only for illustrating simultaneously）, the axial force automatic balancing that this impeller of pump produces, in this axial subdivision
Opening structure pump is the medium conveying to achieve high-lift parameter in big flow using horizonally split double feed inlet housing, adopts simultaneously
First-stage double suction impeller solving in pump inlet uniform pressure with using under parameter, because the slightly not enough medium of pump inlet pressure is easy
Pump two ends first order during vaporization（Chopped-off head）Single-suction (single-in let) impeller will cavitation problem, improve the scope of application of pump.
Finally illustrate, above-described embodiment is merely to illustrate the technical solution of the utility model and unrestricted, although ginseng
According to preferred embodiment, this utility model is described in detail, it will be understood by those within the art that, can be to this
The technical scheme of utility model is modified or equivalent, the objective without deviating from technical solutions of the utility model and model
Enclose, it all should be covered in the middle of right of the present utility model.
Claims (3)
1. the Double-inlet self-balance multiple-stage centrifugal of first-stage double suction impeller, including housing and rotor, housing two ends are constituted for import
Double feed inlet, housing central section is outlet, and the rotor in exit is provided with impeller, and the impeller in exit is double-entry impeller, in two imports
The rotor in housing and outlet between is provided with impeller；Impeller between two inlet and outlets is multistage and is arranged symmetrically in out
The both sides of the double-entry impeller at mouthful；Impeller corresponding with entrance be first stage impeller it is characterised in that：Described first stage impeller is double
Phyllidium wheel, remaining grade of impeller is single-suction (single-in let) impeller.
2. first-stage double suction impeller according to claim 1 Double-inlet self-balance multiple-stage centrifugal it is characterised in that：Described
Double-inlet self-balance multiple-stage centrifugal is sectional type Double-inlet self-balance multiple-stage centrifugal.
3. first-stage double suction impeller according to claim 1 Double-inlet self-balance multiple-stage centrifugal it is characterised in that：Described
Double-inlet self-balance multiple-stage centrifugal is scroll casing type Double-inlet self-balance multiple-stage centrifugal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620939227.7U CN205937140U (en) | 2016-08-25 | 2016-08-25 | Double feed inlet self -balancing multistage centrifugal pump of chopped -off head double suction impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620939227.7U CN205937140U (en) | 2016-08-25 | 2016-08-25 | Double feed inlet self -balancing multistage centrifugal pump of chopped -off head double suction impeller |
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| CN205937140U true CN205937140U (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620939227.7U Active CN205937140U (en) | 2016-08-25 | 2016-08-25 | Double feed inlet self -balancing multistage centrifugal pump of chopped -off head double suction impeller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762678A (en) * | 2017-02-10 | 2017-05-31 | 长沙佳能通用泵业有限公司 | A kind of horizontal middle open type parallel connection multistage pump |
| CN114439754A (en) * | 2022-01-26 | 2022-05-06 | 湖南凯利特泵业有限公司 | Self-balancing double-suction multistage split pump equipment |
-
2016
- 2016-08-25 CN CN201620939227.7U patent/CN205937140U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762678A (en) * | 2017-02-10 | 2017-05-31 | 长沙佳能通用泵业有限公司 | A kind of horizontal middle open type parallel connection multistage pump |
| CN106762678B (en) * | 2017-02-10 | 2018-05-08 | 长沙佳能通用泵业有限公司 | A kind of horizontal middle open type parallel connection multistage pump |
| CN114439754A (en) * | 2022-01-26 | 2022-05-06 | 湖南凯利特泵业有限公司 | Self-balancing double-suction multistage split pump equipment |
| CN114439754B (en) * | 2022-01-26 | 2023-12-08 | 湖南凯利特泵业有限公司 | Self-balancing double-suction multistage split pump equipment |
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