CN207377811U - A kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation - Google Patents
A kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation Download PDFInfo
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- CN207377811U CN207377811U CN201721340212.XU CN201721340212U CN207377811U CN 207377811 U CN207377811 U CN 207377811U CN 201721340212 U CN201721340212 U CN 201721340212U CN 207377811 U CN207377811 U CN 207377811U
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- pressure pulsation
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Abstract
The utility model discloses a kind of centrifugal multistage pump multiple centrifugal pumps of low-pressure pulsation, including pedestal, the pump housing on pedestal, the lower end of the pump housing is equipped with suction casing, upper end, which is equipped with, extrudes section, arranged on the in vivo pump shaft of pump, multiple impellers are connected on pump shaft, guide vane combines, and suction casing, multiple impellers, guide vane combines and extrudes section and forms pump housing inner cavity runner, the upper end of pump shaft is equipped with balancing drum, further include the hydrostatic wheel being sheathed on pump shaft, hydrostatic wheel is arranged on multiple impellers, guide vane is combined and extruded between section, hydrostatic wheel and multiple impellers, water retaining disk is equipped between guide vane combination, the outer ring of hydrostatic wheel is connected with extruding the inner circle of section, section is extruded to set in the annular tubular that axial cross section is isosceles trapezoid.The utility model is in the case where ensuring the precondition of pump group hydraulic performance, by pump group structure optimization, improving and extruding section, increase hydrostatic wheel component, it is required to realize that low-pressure is pulsed, the low-pressure pulsation of centrifugal multistage pump multiple centrifugal pump is eliminated from source, so as to improve centrifugal pump reliability of operation.
Description
Technical field
The utility model is related to centrifugal multistage pump multiple centrifugal pump, more specifically to a kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation.
Background technology
Centrifugal multistage pump multiple centrifugal pump is that more than two centrifugal pump impellers with said function gather together, fluid passageway knot
On structure, show that the medium pressure relief opening of the first order is communicated with the import of the second level, the medium pressure relief opening of the second level and the third level
Import communicates, and the mechanism so connected forms centrifugal multistage pump multiple centrifugal pump.
Common multistage centrifugal pump configuration is as shown in Figure 1, pump shaft 1 is connected with multiple 4 Hes of impeller in the pump housing 2 on pump shaft 1
Guide vane 5 combines, and the lower end of the pump housing 2 is equipped with suction casing 3, and the upper end of the pump housing 2, which is equipped with, extrudes section 6, is equipped with again on the upper end of pump shaft 1
Balancing drum 7 is balanced fixation, and current enter from suction casing 3 inside the pump housing 2, and the high speed for driving multiple impellers 4 in pump shaft 1 rotates
Under effect, current are combined through multiple impellers 4 and guide vane 5, are flowed out by extrusion section 6.
But above-mentioned centrifugal multistage pump multiple centrifugal pump extrudes the water-out manners of section, be by the spiral asymmetric extrusion section with cut water,
Therefore, current can generate radial load when single channel spiral shape is extruded and flowed in section, and the radial load can generate pump shaft and disturb
It is dynamic, the rotation of pump shaft is affected, ultimately results in centrifugal pump reliability and service life reduction.
Utility model content
In view of the above defects of the prior art, the purpose of this utility model is to provide a kind of the more of low-pressure pulsation
Grade centrifugal pump, in the case where ensuring the precondition of pump group hydraulic performance, by pump group structure optimization, improving and extruding section, increase quiet
Water wheels component to realize low-pressure pulsation requirement, eliminates the low-pressure pulsation of centrifugal multistage pump multiple centrifugal pump, so as to improve centrifugation from source
The reliability of pump operation.
To achieve the above object, the utility model adopts the following technical solution：
A kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation, including pedestal, the pump housing on pedestal, the lower end of the pump housing, which is equipped with, inhales
Enter section, the upper end of the pump housing, which is equipped with, extrudes section, arranged in vivo pump shaft is pumped, multiple impellers, guide vane combination is connected on pump shaft, and is sucked
Section, the combination of multiple impellers, guide vane and extrusion section form pump housing inner cavity runner, and the upper end of pump shaft is equipped with balancing drum, further includes and be arranged
In the hydrostatic wheel on pump shaft, hydrostatic wheel be arranged on multiple impellers, guide vane combination extrude section between, hydrostatic wheel and multiple impellers are led
Water retaining disk is equipped between leaf combination, the outer ring of hydrostatic wheel is connected with extruding the inner circle of section；
The section that extrudes is set in the annular tubular that axial cross section is isosceles trapezoid, and small-caliber end is arranged in the pump housing, with
Hydrostatic wheel connects, and heavy caliber end is water outlet, outside the pump housing.
The hydrostatic wheel includes front shroud, back shroud, front vane and rear blade, and front shroud is respectively provided with back shroud in loudspeaker
Shape, front vane set symmetrical in 180 ° of circumference with rear blade.
Adjusting pad is equipped between the hydrostatic wheel and water retaining disk.
The hydrostatic wheel is sheathed on by axle sleeve on pump shaft.
The port of export diameter of the extrusion section is identical with the inlet diameter of suction casing.
Mechanical seal is equipped at the top of the pump housing.
The outer ring of the hydrostatic wheel is with extruding the inner circle of section using interference fit.
The section of the front vane is set in bar shaped.
The section of the rear blade sets Y-shaped.
The front vane, rear blade periphery are equipped with the fillet of R2~R5.
In above-mentioned technical solution, a kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation provided by the utility model passes through
Increase the components such as hydrostatic wheel, change the water-out manners that centrifugal multistage pump multiple centrifugal pump extrudes section, by the spiral asymmetric extrusion with cut water
Section, the symmetrical of annular for being changed to no cut water extrude section, eliminate impact of the current to cut water, eliminate current in single channel spiral
Shape extrudes the radial load that flowing generates in section, the disturbance without radial load when rotating pump shaft.Increase extrudes the outlet diameter of section, makes
It is identical with inlet diameter, so as to reduce the water discharge speed of pump, reduces impact of the current to valve and pipeline, finally improve from
The reliability and service life of heart pump.
Description of the drawings
Fig. 1 is the structure diagram of existing centrifugal multistage pump multiple centrifugal pump；
Fig. 2 is the structure diagram of the utility model；
Fig. 3 is the structure diagram of the utility model hydrostatic wheel；
Fig. 4 is the left view of Fig. 3；
Fig. 5 is the top view of Fig. 3.
Specific embodiment
The technical solution of the utility model is further illustrated with reference to the accompanying drawings and examples.
Incorporated by reference to the centrifugal multistage pump multiple centrifugal pump that shown in Fig. 2 to Fig. 5, a kind of low-pressure provided by the utility model is pulsed, this reality
The centrifugal multistage pump multiple centrifugal pump that example uses vertical structure is applied, including pedestal 8, the pump housing 9 on pedestal 8, the lower end of the pump housing 9, which is equipped with, inhales
Enter section 10, the upper end of the pump housing 9, which is equipped with, extrudes section 11, the pump shaft 12 also inside the pump housing 9, is fixed on pump shaft 12 multiple
Impeller 13, guide vane 14 combine, and suction casing 10, multiple impellers 13, guide vane 14 combine and extrude section 11 and form 9 inner cavity of pump housing stream
Road, the upper end of pump shaft 12 are equipped with balancing drum 15, and 15 outside of balancing drum is cased with bushing 16, and above-mentioned is prior art part, herein
It repeats no more.Unlike the prior art, the hydrostatic wheel 18 being sheathed on by axle sleeve 17 on pump shaft 12, hydrostatic wheel 18 are further included
Between multiple impellers 13, guide vane 14 combine and extrude section 11, and hydrostatic wheel 18 combines it with multiple impellers 13, guide vane 14
Between be equipped with water retaining disk 19, with extruding the inner circle of section 11 using being interference fitted, hydrostatic wheel 18 is forced out section again for the outer ring of hydrostatic wheel 18
11 and water retaining disk 19 compress.The adjusting pad 20 of a ring-shaped rubber is additionally provided between hydrostatic wheel 18 and water retaining disk 19, it is quiet for adjusting
18 axially mounted gap of water wheels.
Preferably, the section 11 that extrudes is set in the annular tubular that axial cross section is isosceles trapezoid, small-caliber end is arranged on
In the pump housing 12, being connected with hydrostatic wheel 18, heavy caliber end is water outlet, outside the pump housing 12, port of export diameter and suction casing 10
Inlet diameter is identical, so as to reduce the water discharge speed of pump, reduces impact of the current to valve and pipeline.
Current enter from suction casing 10 inside the pump housing 9, are revolved in the high speed that pump shaft 12 drives multiple impellers 13, guide vane 14 to combine
Transfer under use, current pass through 9 inner cavity runner of the pump housing, finally reach hydrostatic wheel 18 (in Fig. 2 arrow represent water movement direction and
Path), multiple impellers 13 of 18 relatively high speed rotation of hydrostatic wheel, guide vane 14 combine for be stationary, after water flows through
Speed reduces, and pressure fluctuation reduces, thus more steady tranquil.
Preferably, the hydrostatic wheel 18 includes front shroud 1801, back shroud 1802, front vane 1803 and rear blade
1804, front shroud 1801 is respectively provided with flare shape with back shroud 1802, and current are passed through between the two.Front vane 1803 is with after
Blade 1804 sets symmetrical in 180 ° of circumference, and riding position is consistent with current water outlet direction during installation, convenient for current by,
Hydraulic loss is reduced, the close mouth of a river that pumps out is front vane 1803 in two blades, and section is bar shaped, another is rear leaf
Piece 1804, section are Y shape, and front vane 1803 and 1804 periphery of rear blade all carry the fillet of R2~R5.
Preferably, 9 top of the pump housing is equipped with mechanical seal 21,9 leak of the pump housing is prevented.
In conclusion the stator-rotor interaction between impeller and spiral case cut water causes centrifugation pump pressure fluctuation in the prior art
Main cause, it is obviously to the disturbance of pump shaft to the impact of cut water and radial load to illustrate current.The utility model leads to
The components such as increase hydrostatic wheel are crossed, change the water-out manners that centrifugal multistage pump multiple centrifugal pump extrudes section, by the spiral asymmetric pressure with cut water
Go out section, the symmetrical of annular for being changed to no cut water extrudes section, eliminates impact of the current to cut water, eliminates current in single channel spiral shell
It revolves shape and extrudes the radial load that flowing generates in section, the disturbance without radial load when rotating pump shaft.Increase extrudes the outlet diameter of section,
Make it identical with inlet diameter, so as to reduce the water discharge speed of pump, reduce impact of the current to valve and pipeline, finally improve
The reliability and service life of centrifugal pump.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate that this practicality is new
Type, and be not used as the restriction to the utility model, as long as in the spirit of the utility model, to the above
Variation, the modification of embodiment will all fall in the Claims scope of the utility model.
Claims (10)
1. a kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation, including pedestal, the pump housing on pedestal, the lower end of the pump housing is equipped with sucking
Section, the upper end of the pump housing, which is equipped with, extrudes section, arranged in vivo pump shaft is pumped, multiple impellers, guide vane combination is connected on pump shaft, and is sucked
Section, the combination of multiple impellers, guide vane and extrusion section form pump housing inner cavity runner, and the upper end of pump shaft is equipped with balancing drum, which is characterized in that
Further include the hydrostatic wheel being sheathed on pump shaft, hydrostatic wheel be arranged on multiple impellers, guide vane combination extrude section between, hydrostatic wheel with it is more
Water retaining disk is equipped between a impeller, guide vane combination, the outer ring of hydrostatic wheel is connected with extruding the inner circle of section；
The section that extrudes is set in the annular tubular that axial cross section is isosceles trapezoid, and small-caliber end is arranged in the pump housing, with hydrostatic
Wheel connection, heavy caliber end is water outlet, outside the pump housing.
2. the centrifugal multistage pump multiple centrifugal pump of a kind of low-pressure pulsation as described in claim 1, which is characterized in that the hydrostatic wheel includes
Front shroud, back shroud, front vane and rear blade, front shroud are respectively provided with flare shape with back shroud, and front vane is set with rear blade
It puts symmetrical in 180 ° of circumference.
3. the centrifugal multistage pump multiple centrifugal pump of a kind of low-pressure pulsation as described in claim 1, which is characterized in that the hydrostatic wheel and gear
Adjusting pad is equipped between water pond.
4. the centrifugal multistage pump multiple centrifugal pump of a kind of low-pressure pulsation as described in claim 1, which is characterized in that the hydrostatic wheel passes through
Axle sleeve is sheathed on pump shaft.
5. the centrifugal multistage pump multiple centrifugal pump of a kind of low-pressure pulsation as described in claim 1, which is characterized in that the extrusion section goes out
Mouth end diameter is identical with the inlet diameter of suction casing.
6. the centrifugal multistage pump multiple centrifugal pump of a kind of low-pressure pulsation as described in claim 1, which is characterized in that set at the top of the pump housing
There is mechanical seal.
7. the centrifugal multistage pump multiple centrifugal pump of a kind of low-pressure pulsation as described in claim 1, which is characterized in that outside the hydrostatic wheel
Circle is with extruding the inner circle of section using interference fit.
8. the centrifugal multistage pump multiple centrifugal pump of a kind of low-pressure pulsation as claimed in claim 2, which is characterized in that the front vane is cut
Face is set in bar shaped.
9. the centrifugal multistage pump multiple centrifugal pump of a kind of low-pressure pulsation as claimed in claim 2, which is characterized in that the rear blade is cut
Face sets Y-shaped.
10. a kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation as claimed in claim 2, which is characterized in that the front vane, after
Blade periphery is equipped with the fillet of R2~R5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721340212.XU CN207377811U (en) | 2017-10-18 | 2017-10-18 | A kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721340212.XU CN207377811U (en) | 2017-10-18 | 2017-10-18 | A kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation |
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| Publication Number | Publication Date |
|---|---|
| CN207377811U true CN207377811U (en) | 2018-05-18 |
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| CN201721340212.XU Active CN207377811U (en) | 2017-10-18 | 2017-10-18 | A kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681435A (en) * | 2017-10-18 | 2019-04-26 | 上海凯士比泵有限公司 | A kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation |
-
2017
- 2017-10-18 CN CN201721340212.XU patent/CN207377811U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681435A (en) * | 2017-10-18 | 2019-04-26 | 上海凯士比泵有限公司 | A kind of centrifugal multistage pump multiple centrifugal pump of low-pressure pulsation |
| CN109681435B (en) * | 2017-10-18 | 2024-06-07 | 上海凯士比泵有限公司 | Multistage centrifugal pump with low pressure pulsation |
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