CN106704254B - A kind of double suction centrifugal pump - Google Patents
A kind of double suction centrifugal pump Download PDFInfo
- Publication number
- CN106704254B CN106704254B CN201710069467.5A CN201710069467A CN106704254B CN 106704254 B CN106704254 B CN 106704254B CN 201710069467 A CN201710069467 A CN 201710069467A CN 106704254 B CN106704254 B CN 106704254B
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- CN
- China
- Prior art keywords
- impeller
- pump
- centrifugal pump
- suction centrifugal
- keyway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/185—Rotors consisting of a plurality of wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2272—Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/006—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps double suction pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to centrifugation pump technical fields, disclose a kind of double suction centrifugal pump, are set on same pump shaft, identical first impeller of shape and the second impeller including being connected by key；Second impeller is equipped with multiple keyways axially extended, and multiple keyways cooperate from the key on pump shaft so that forming different impeller alternate angles between the first impeller and the second impeller respectively.Double suction centrifugal pump provided by the invention, by the way that multiple keyways will be arranged in the mounting hole of one of impeller, in use process, by the way that the key on pump shaft is inserted into different keyways, realize the impeller impeller alternate angle different from installation site fixed impeller cooperation generation, realize the adjustable of impeller alternate angle, adjustment mode is simple, solve has the centrifugal pump vibration of fixed impeller alternate angle big in the prior art, the big defect of noise, convenient for the regulation of double-suction centrifugal pump pump pressure fluctuation, so that double-suction centrifugal pump pump operation is more stable, reduce the abrasion of pump, it improves service life.
Description
Technical field
The present invention relates to centrifugation pump technical fields, more particularly to a kind of double suction centrifugal pump.
Background technique
The features such as double suction centrifugal pump is efficient high relative to single-suction centrifugal pump, flow is big and lift is higher, field irrigation,
It is widely used in urban water supply, water diversion project.
The usual monoblock cast of the impeller of double suction centrifugal pump in the prior art inevitably generates in the process of running
Pressure fluctuation.Wherein endanger it is maximum be blade passing frequency (Ye Pin) pressure fluctuation ingredient, it result from rotary blade with
Stator-rotor interaction effect between static pumping chamber, and can cause noise and vibration, when serious very to outlet pipeline Systematic Communication
To initiation system resonance.
Summary of the invention
(1) technical problems to be solved
The object of the present invention is to provide a kind of double suction centrifugal pumps, to solve in double suction centrifugal pump operational process in the prior art
Vibrate big defect.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of double suction centrifugal pumps, including are connected by key and are set in together
On one pump shaft, identical first impeller of shape and the second impeller；Second impeller is equipped with multiple keys axially extended
Slot, multiple keyways cooperate with the key on the pump shaft so that being formed not between first impeller and the second impeller respectively
Same impeller alternate angle.
Wherein, the positional relationship of multiple keyways circumferentially are as follows:
First keyway position:
α1=0 °；
Deviation angle of n-th of keyway with respect to first keyway:
Wherein, z is the number of blade of second impeller；λn-1For impeller alternate angle, n is the integer greater than 1.
Wherein, the λn-1There are following relationships:
λn-1=(n-1) × λ1；
Wherein, λn-1≤ 360 °/(2 × z), λ1>0°。
Wherein, the keyway is 4.
(3) beneficial effect
Double suction centrifugal pump provided by the invention is used by the way that multiple keyways will be arranged in the mounting hole of one of impeller
In the process, by the way that the key on pump shaft to be inserted into different keyways, the impeller cooperation for realizing that the impeller and installation site are fixed is produced
Raw different impeller alternate angle, realizes the adjustable of impeller alternate angle, and adjustment mode is simple, solves to have in the prior art and fix
The defect that the centrifugal pump vibration of impeller alternate angle is big, noise is big regulates and controls convenient for double-suction centrifugal pump pump pressure fluctuation, so that double-suction centrifugal pump
Pump operation is more stable, reduces the abrasion of pump, improves service life.
Detailed description of the invention
Fig. 1 is the first impeller side view in the embodiment of the present invention；
Fig. 2 is the second impeller side view in the embodiment of the present invention；
Fig. 3 is assembling schematic diagram when impeller angle is zero in the embodiment of the present invention；
Assembling schematic diagram when Fig. 4 is impeller angle non-zero in the embodiment of the present invention；
Fig. 5 is the isometric views of Fig. 4；
In figure, the 1, first impeller；2, the second impeller；11, single keyway；21, the first keyway；22, the second keyway；23,
Key-groove.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Following instance
For illustrating the present invention, but it is not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
After interlocking some researches show that the double-suction centrifugal pump impeller for arranging conventional symmetrical, the width of leaf frequency pressure fluctuation can be reduced
Value.Contain partition among such double-suction centrifugal pump impeller, and makes double-suction centrifugal pump impeller two sides exit edge of blade at certain
Stagger angle, i.e. impeller alternate angle.This impeller is usually monoblock cast, and stagger angle is once it is determined that just can not change.But it is real
For the double-entry impeller of different cornerites and the number of blade on border, stagger angle is not consistent, instead can when being simply uniformly interleaved with
There is detrimental effect.
Fig. 1 is the first impeller side view in the embodiment of the present invention；Fig. 2 is the second impeller side view in the embodiment of the present invention；
Fig. 3 is assembling schematic diagram when impeller angle is zero in the embodiment of the present invention；Fig. 4 is impeller angle non-zero in the embodiment of the present invention
When assembling schematic diagram；Fig. 5 is the isometric views of Fig. 4.
The present invention provides a kind of double suction centrifugal pump, including being set on same pump shaft, identical first impeller, 1 and of shape
Second impeller 2, two impellers are fixed on pump shaft by key.Keyway is set on pump shaft, corresponding key, keyway edge are set in keyway
Pump shaft axis direction.Single keyway 11 is set on first impeller 1 and the centre bore of pump shaft cooperation, in assembling process, the first impeller 1
Cooperation position with pump shaft be it is fixed, the position of keyway is as shown in fig. 1 in the first impeller 1.Second impeller 2 cooperates with pump shaft
Position multiple keyways are set, such as provided with 3 keyways, as shown in Figure 2.In this way when assembling the second impeller 2, pass through choosing
Different keyways is selected, the first impeller 1 can generate different impeller alternate angles from the second impeller 2 after assembly.First impeller 1 and second
Keyway on impeller 2 opens up in the axial direction.
Double suction centrifugal pump provided by the invention is used by the way that multiple keyways will be arranged in the mounting hole of one of impeller
In the process, by the way that the key on pump shaft to be inserted into different keyways, the impeller cooperation for realizing that the impeller and installation site are fixed is produced
The effect of raw different impeller alternate angle, realizes the adjustable of impeller alternate angle, adjustment mode is simple, solves and has in the prior art
There is the defect that the centrifugal pump vibration of fixed impeller alternate angle is big, noise is big, regulates and controls convenient for double-suction centrifugal pump pump pressure fluctuation, so that double
It is more stable to be sucked away from heart pump operation, reduces the abrasion of pump, improves service life.
On the basis of the above embodiments, the positional relationship of each keyway on the second impeller 2 circumferentially are as follows:
First keyway position:
α1=0 °； (1)
Deviation angle of n-th of keyway with respect to first keyway:
Wherein, z is the number of blade of second impeller 2；λn-1For impeller alternate angle, n is the integer greater than 1.
For example, the second impeller 2 has 6 blades in the present embodiment, then z is equal to 6, angle of any two blade in exit
As 60 °.To different impeller alternate angle λn-1Carry out λ in assignment, such as the present embodiment1Be 5 °, i.e. the second keyway 22 with it is single
When keyway 11 cooperates, the impeller alternate angle of generation is 5 °.
The position for determining keyway on the second impeller 2 in this way can accurately control the first impeller 1 and the assembly of the second impeller 2
The size of impeller alternate angle afterwards.
On the basis of the above embodiments, λn-1There are following relationships:
λn-1=(n-1) × λ1； (3)
Wherein, λn-1≤ 360 °/(2 × z), λ1>0°。λn-1Meet the condition, is intensity and dress for the second impeller 2
Result after matching considers.The number of key is under the premise of guaranteeing the second 2 intensity of impeller, diminution λ as far as possiblen-1Value, increase key
Number, realize more a possibility that adjusting the angle.
For example, taking number of blade z in the present embodiment is 6, λ is taken1It is 10 °, then λ2It is 20 °, i.e. the first keyway 21 and the second keyway
Angle between 22 is 70 °, and the angle between third keyway 23 and the first keyway 21 is 150 °, and the impeller alternate angle after cooperation is 20 °.
When first keyway 21 cooperates with single keyway 11, installation diagram is as shown in Figure 3；When third keyway 23 and single keyway 11 cooperate, dress
Figure is as shown in Figure 4 and Figure 5.Preferably, keyway is 4.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of double suction centrifugal pump, which is characterized in that be set on same pump shaft, shape identical including being connected by key
One impeller and the second impeller；Second impeller be equipped with multiple keyways axially extended, multiple keyways respectively with institute
The key stated on pump shaft cooperates so that forming different impeller alternate angles between first impeller and the second impeller；
Wherein, the positional relationship of multiple keyways circumferentially are as follows:
First keyway position:
α1=0 °；
Deviation angle of n-th of keyway with respect to first keyway:
Wherein, z is the number of blade of second impeller；λn-1For impeller alternate angle, n is the integer greater than 1, the λn-1In the presence of such as
Lower relationship:
λn-1=(n-1) × λ1；
Wherein, λn-1≤ 360 °/(2 × z), λ1>0°。
2. double suction centrifugal pump as described in claim 1, which is characterized in that the keyway is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710069467.5A CN106704254B (en) | 2017-02-08 | 2017-02-08 | A kind of double suction centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710069467.5A CN106704254B (en) | 2017-02-08 | 2017-02-08 | A kind of double suction centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106704254A CN106704254A (en) | 2017-05-24 |
| CN106704254B true CN106704254B (en) | 2019-08-06 |
Family
ID=58910691
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710069467.5A Active CN106704254B (en) | 2017-02-08 | 2017-02-08 | A kind of double suction centrifugal pump |
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| CN (1) | CN106704254B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1671988A1 (en) * | 1989-09-13 | 1991-08-23 | Научно-исследовательский и конструкторский институт центробежных и роторных компрессоров | Centrifugal compressor impeller |
| CN201306306Y (en) * | 2008-11-07 | 2009-09-09 | 河南省西峡汽车水泵股份有限公司 | Water pump impeller with vanes on the back |
| CN201827133U (en) * | 2010-05-31 | 2011-05-11 | 张玲玲 | Impeller assembly for suction centrifugal pump |
| JP2011140917A (en) * | 2010-01-08 | 2011-07-21 | Torishima Pump Mfg Co Ltd | Double suction pump |
| CN103994097A (en) * | 2014-04-29 | 2014-08-20 | 江苏大学 | Double-suction impeller and double-suction vortex pump |
| CN104131995A (en) * | 2013-04-30 | 2014-11-05 | 吴为国 | Water pump impeller manufacturing method and water pump |
-
2017
- 2017-02-08 CN CN201710069467.5A patent/CN106704254B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1671988A1 (en) * | 1989-09-13 | 1991-08-23 | Научно-исследовательский и конструкторский институт центробежных и роторных компрессоров | Centrifugal compressor impeller |
| CN201306306Y (en) * | 2008-11-07 | 2009-09-09 | 河南省西峡汽车水泵股份有限公司 | Water pump impeller with vanes on the back |
| JP2011140917A (en) * | 2010-01-08 | 2011-07-21 | Torishima Pump Mfg Co Ltd | Double suction pump |
| CN201827133U (en) * | 2010-05-31 | 2011-05-11 | 张玲玲 | Impeller assembly for suction centrifugal pump |
| CN104131995A (en) * | 2013-04-30 | 2014-11-05 | 吴为国 | Water pump impeller manufacturing method and water pump |
| CN103994097A (en) * | 2014-04-29 | 2014-08-20 | 江苏大学 | Double-suction impeller and double-suction vortex pump |
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| Publication number | Publication date |
|---|---|
| CN106704254A (en) | 2017-05-24 |
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