CN201836057U - Multistage centrifugal pump - Google Patents
Multistage centrifugal pump Download PDFInfo
- Publication number
- CN201836057U CN201836057U CN2010205873213U CN201020587321U CN201836057U CN 201836057 U CN201836057 U CN 201836057U CN 2010205873213 U CN2010205873213 U CN 2010205873213U CN 201020587321 U CN201020587321 U CN 201020587321U CN 201836057 U CN201836057 U CN 201836057U
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- Prior art keywords
- pump
- multistage centrifugal
- centrifugal pump
- section
- constant voltage
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Abstract
The utility model discloses a multistage centrifugal pump which comprises a flow liquid channel, the flow liquid channel comprises a suction section, a delivery section, a middle section respectively connected with the suction section and the delivery section as well as a pump shaft penetrating behind the middle section and the delivery section and connected with a motor; a plurality of centrifugal impellers are arranged on the pump shaft positioned at the middle section, and guide vanes are arranged outside the centrifugal impellers; and the multistage centrifugal pump further comprises a constant-pressure centrifugal impeller arranged at the delivery section. The utility model has the benefits that in the multistage centrifugal pump, the performance curve of the pump is flattened in a constant-pressure way through an ultimate constant-pressure centrifugal impeller, the pump head has the characteristics of accurate constant pressure within a certain flow range, the purposes of accurate constant pressure and high efficiency can be achieved without the need of utilizing peripheral equipment, and the working efficiency and performance of the multistage centrifugal pump can be improved.
Description
Technical field
The utility model relates to the fire water pump field, particularly a kind of multistage centrifugal pump.
Background technique
For of the requirement of reply fire water pump market, mainly contain two class constant voltage fire water pumps in the market to constant voltage.One class is the tangent line fire water pump, belongs to the category of partial emission pump, and because of the blade exit laying angle is 90 degree, lift has the characteristics of accurate constant voltage in the certain flow scope, but such pump efficiency is low, and to compare match power bigger than normal with conventional pumps, has high input.Another kind of is at Ordinary Centrifugal Pumps outlet dress hydraulic control valve, set rated pressure, when centrifugal pump under the less operating mode of flow, hydraulic control valve was opened when pump discharge pressure surpassed setting value, part water is got back to pump inlet through the relief port of valve, reaches the characteristics of accurate constant voltage, and such is actual to be the pump group, damage as hydraulic control valve, the pump group will lose the constant voltage function.
The model utility content
The technical problems to be solved in the utility model is in order to overcome the defective that the constant voltage performance bigger than normal and unipump of the match power of pump in the prior art relies on external equipment, a kind of multistage centrifugal pump to be provided.
The utility model solves above-mentioned technical problem by following technical proposals:
A kind of multistage centrifugal pump, it comprises a suction casing, one Spit Section, one connects the stage casing of this suction casing and Spit Section respectively, an and pump shaft that is connected with a motor behind this stage casing and the Spit Section, its characteristics are that the pump shaft that is positioned at this stage casing is provided with some receded disk impellers, and described receded disk impeller is equipped with a stator outward; This multistage centrifugal pump also comprises the constant voltage receded disk impeller of being located in this Spit Section.
Wherein, this constant voltage receded disk impeller comprises some arc shaped blades, and the outlet laying angle of described arc shaped blade is 90 °.
Wherein, this Spit Section is the scroll casing type structure, makes things convenient for the cutting of impeller (being the constant voltage receded disk impeller), thereby makes range of lift wider.
In the utility model, but above-mentioned optimum condition combination in any on the basis that meets related domain general knowledge promptly gets each preferred embodiments of the utility model.
Positive progressive effect of the present utility model is: multistage centrifugal pump is flat with the pump performance curve back of the body by the constant voltage receded disk impeller constant voltage of final stage in the utility model, lift has the characteristics of accurate constant voltage in the certain flow scope, reach the purpose of accurate constant voltage, and need not to utilize external equipment just can reach constant voltage, purpose efficiently, improved the working efficiency and the performance of multistage centrifugal pump.
Description of drawings
Fig. 1 is the sectional drawing of multistage centrifugal pump of the present utility model.
Fig. 2 is the structural representation of constant voltage receded disk impeller in the utility model.
Embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
As shown in Figure 1, same as the prior art, multistage centrifugal pump in the utility model comprises stage casing 4 and is positioned at the suction casing 1 and the Spit Section 7 at its two ends, one end of a pump shaft 5 by rigid coupling 11 be connected with motor 12 through this stage casing 4 and Spit Section 7, its other end is arranged in suction casing 1.This suction casing 1, stage casing 4 and Spit Section 7 are connected by two turnbuckles 9.The top of this Spit Section 7 is provided with a support 8, and this motor 12 is fixed on this support 8, and support 8 is connected by mechanical seal 10 with pump shaft 5.Be provided with two receded disk impellers 2 in stage casing 4, all be furnished with a stator 3 on each receded disk impeller 2, described receded disk impeller 2 and stator 3 all are fixed on this pump shaft 5.The utility model difference from prior art exists, and on the pump shaft 5 of Spit Section 7 being has the impeller of a constant voltage receded disk impeller 6 as this multistage centrifugal pump, and this constant voltage receded disk impeller 6 is not equipped with stator.
As shown in Figure 2, this constant voltage receded disk impeller 6 comprises six arc shaped blades, and the outlet laying angle of every arc shaped blade is 90 °, thereby reaches the characteristics that in certain flow scope lift has accurate constant voltage, improves the efficient of multistage centrifugal pump simultaneously.
More preferably, the scroll casing type structure is adopted in the Spit Section 7 of this multistage centrifugal pump, thereby conveniently is positioned at the cutting of the constant voltage receded disk impeller 6 of final stage, thereby makes range of lift wider.
Below the working principle of multistage centrifugal pump of the present utility model is done simple declaration:
Starting electrical machinery 12, motor shaft drives pump shaft 5 and impeller rotation by rigid coupling 11,2 pairs of liquid works done of carrying from suction casing 1 of receded disk impeller produce lift (pressure), discharge the suction port that flows into next stage receded disk impeller 2 through stator 3, the liquid work done of continuation to being carried, produce lift (pressure), discharge through stator 3, suction port until the constant voltage receded disk impeller 6 of last inflow final stage, 6 pairs of liquid of being carried of the constant voltage receded disk impeller of final stage continue work done, produce the lift (pressure) of accurate constant voltage, 7 discharge through the Spit Section.
Though more than described embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection domain of the present utility model is limited by appended claims.Those skilled in the art can make numerous variations or modification to these mode of executions under the prerequisite that does not deviate from principle of the present utility model and essence, but these changes and modification all fall into protection domain of the present utility model.
Claims (3)
1. multistage centrifugal pump, it comprises a flow liquid passage, this flow liquid passage comprises a suction casing, a Spit Section, one connects the stage casing of this suction casing and Spit Section respectively; And a pump shaft that is connected with a motor behind this stage casing and the Spit Section, it is characterized in that the pump shaft that is positioned at this stage casing is provided with some receded disk impellers, described receded disk impeller is equipped with a stator outward; This multistage centrifugal pump also comprises the constant voltage receded disk impeller of being located in this Spit Section.
2. multistage centrifugal pump as claimed in claim 1 is characterized in that, this constant voltage receded disk impeller comprises some arc shaped blades, and the outlet laying angle of described arc shaped blade is 90 °.
3. multistage centrifugal pump as claimed in claim 1 or 2 is characterized in that, this Spit Section is the scroll casing type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205873213U CN201836057U (en) | 2010-11-02 | 2010-11-02 | Multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205873213U CN201836057U (en) | 2010-11-02 | 2010-11-02 | Multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201836057U true CN201836057U (en) | 2011-05-18 |
Family
ID=44006161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205873213U Expired - Fee Related CN201836057U (en) | 2010-11-02 | 2010-11-02 | Multistage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201836057U (en) |
-
2010
- 2010-11-02 CN CN2010205873213U patent/CN201836057U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20111102 |