CN213116712U - Anti-cavitation vertical multistage centrifugal pump - Google Patents
Anti-cavitation vertical multistage centrifugal pump Download PDFInfo
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- CN213116712U CN213116712U CN202021777895.7U CN202021777895U CN213116712U CN 213116712 U CN213116712 U CN 213116712U CN 202021777895 U CN202021777895 U CN 202021777895U CN 213116712 U CN213116712 U CN 213116712U
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Abstract
The utility model discloses an anti-cavitation vertical multistage centrifugal pump, which relates to the field of vertical multistage centrifugal pumps and comprises an outer cylinder and a water inlet and outlet section which is vertically connected with the outer cylinder, wherein a pump shaft which is connected and driven by a motor is encapsulated in the outer cylinder, a first-stage impeller which is in a butterfly structure is fixedly arranged at the head part of the pump shaft, a plurality of stages of impellers are fixedly arranged above the first-stage impeller along the pump shaft in sequence, guide vanes are arranged at the peripheries of the impellers of all stages, the end parts of the guide vanes are fixedly installed with an extension seat, and a fluid director which is arranged at the head part of the first-stage impeller is; the outer cylinder is vertically connected with the water inlet section and the water outlet section through a water inlet component, a connecting sleeve is arranged between the water inlet component and the fluid director, a water suction chamber is formed between the fluid director and the water inlet component, and the inlet end of the first-stage impeller is communicated with the water suction chamber. The utility model enlarges the first-stage impeller at the water pump inlet, increases the diameter of the impeller inlet, and reduces the front absolute speed of the blade inlet; the width of the inlet of the blade is increased, the flow area of the inlet is increased, and the absolute speed before the inlet is reduced.
Description
Technical Field
The utility model relates to a vertical multistage centrifugal pump's field, concretely relates to vertical multistage centrifugal pump of anti cavitation.
Background
The inlet flow channel of the existing vertical multistage centrifugal pump is designed to be too short, and has a right-angle bend, so that partial loss and turbulence are generated, and the effect on the stability of fluid is not obvious. In addition, the first-stage impeller of the existing vertical multi-stage centrifugal pump is the same as other impellers in the pump, the impeller inlet is small, the overflowing area is limited, and the absolute speed of the impeller inlet is overhigh when the flow is increased, so that pump cavitation is easily caused. In view of the above two points, the cavitation resistance of the existing vertical multistage centrifugal pump is not ideal.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of prior art existence, and provide a vertical multistage centrifugal pump of anti cavitation, solved current vertical multistage centrifugal pump at large-traffic some cavitation surplus height, the unsatisfactory problem of anti cavitation performance, effectively avoid because of phenomenons such as noise and vibration that the pump cavitation caused.
The purpose of the utility model is accomplished through following technical scheme: the anti-cavitation vertical multistage centrifugal pump comprises an outer cylinder and a water inlet and outlet section which is vertically connected with the outer cylinder, wherein a pump shaft which is driven by a motor in a connecting way is packaged in the outer cylinder; the outer cylinder is vertically connected with the water inlet section and the water outlet section through a water inlet component, a connecting sleeve is arranged between the water inlet component and the fluid director, a water suction chamber is formed between the fluid director and the water inlet component, and the inlet end of the first-stage impeller is communicated with the water suction chamber.
As a further technical scheme, the diameter of the inlet end of the first-stage impeller is larger than that of the inlet end of each-stage impeller.
The utility model has the advantages that:
1. enlarging the first-stage impeller at the inlet of the water pump to increase the diameter of the inlet of the impeller and reduce the front absolute speed of the inlet of the blade; the width of the inlet of the blade is increased, the flow area of the inlet is increased, and the absolute speed before the inlet is reduced;
2. the connecting sleeve is adopted between the fluid director and the water inlet component, so that the water suction chamber of the water pump is enlarged, the distance from the inlet of the water pump to the inlet of the impeller is increased, the stability of the fluid is improved, and the formation of cavitation is reduced;
3. the reduction of the cavitation allowance of the pump can effectively improve the phenomena of noise, vibration and the like caused by the cavitation of the water pump; the service life of the water pump is prolonged, and the stability of the pump is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: the device comprises a first-stage impeller 1, a lengthened seat 2, a fluid director 3, a connecting sleeve 4, a water inlet and outlet section 5, a water inlet component 6, a guide vane 7, an impeller 8, a pump shaft 9 and an outer cylinder 10.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
example (b): as shown in the attached drawing 1, the anti-cavitation vertical multistage centrifugal pump comprises an outer cylinder 10 and a water inlet and outlet section 5 vertically connected with the outer cylinder 10, wherein a pump shaft 9 driven by a motor is packaged in the outer cylinder 10, a first-stage impeller 1 in a butterfly structure is fixedly arranged at the head of the pump shaft 9, a plurality of stages of impellers 8 are fixedly arranged above the first-stage impeller 1 along the pump shaft 9 in sequence, guide vanes 7 are arranged on the peripheries of the impellers 8, the end parts of the guide vanes 7 are fixedly installed with an elongated seat 2, and a fluid director 3 arranged at the head of the first-stage impeller 1 is embedded in the elongated seat 2 for installation and fixation; the outer cylinder 10 is vertically connected with the water inlet and outlet section 5 through the water inlet component 6, a connecting sleeve 4 is arranged between the water inlet component 6 and the fluid director 3, so that a water suction chamber is formed between the fluid director 3 and the water inlet component 6, and the inlet end of the primary impeller 1 is communicated with the water suction chamber. The diameter of the inlet end of the first-stage impeller 1 is larger than that of the inlet end of each-stage impeller 8, so that the front absolute speed of a water flow inlet is effectively reduced.
The utility model discloses a working process: when the centrifugal pump works, fluid firstly enters the water suction chamber through the water inlet and outlet section 5, and the space of the water suction chamber is remarkably increased compared with the existing structure because the connecting sleeve 4 is adopted between the fluid director 3 and the water inlet component 6, so that the distance from the inlet of the water pump to the inlet of the primary impeller 1 is increased, the stability of the fluid is improved, and the formation of cavitation is reduced; after fluid enters the first-stage impeller 1, the diameter of the first-stage impeller 1 is obviously larger than that of the impellers 8 of other stages, so that the flow area of the first-stage impeller 1 is increased, the absolute speed of the fluid at the inlet of the first-stage impeller 1 is not too high under the condition of large flow, pump cavitation is not easy to occur, the cavitation allowance of the pump is reduced, the phenomena of noise, vibration and the like caused by the cavitation of the water pump can be effectively improved, the service life of the pump is prolonged, and the stability of the pump is improved.
It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.
Claims (2)
1. The utility model provides an anti cavitation's vertical multistage centrifugal pump, includes urceolus (10) and business turn over water section (5) of being connected perpendicularly with urceolus (10), pump shaft (9) that drive are connected by the motor encapsulate in urceolus (10), its characterized in that: the head of the pump shaft (9) is fixedly provided with a first-stage impeller (1) in a butterfly structure, a plurality of stages of impellers (8) are sequentially and fixedly arranged above the first-stage impeller (1) along the pump shaft (9), guide vanes (7) are arranged on the peripheries of the stages of impellers (8), the end parts of the guide vanes (7) are fixedly installed with the lengthening base (2), and a fluid director (3) arranged at the head of the first-stage impeller (1) is embedded into the lengthening base (2) and fixedly installed; the outer cylinder (10) is vertically connected with the water inlet and outlet section (5) through a water inlet component (6), a connecting sleeve (4) is arranged between the water inlet component (6) and the fluid director (3), so that a water suction chamber is formed between the fluid director (3) and the water inlet component (6), and the inlet end of the first-stage impeller (1) is communicated with the water suction chamber.
2. The anti-cavitation vertical multistage centrifugal pump according to claim 1, characterized in that: the diameter of the inlet end of the first-stage impeller (1) is larger than that of the inlet end of each-stage impeller (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021777895.7U CN213116712U (en) | 2020-08-21 | 2020-08-21 | Anti-cavitation vertical multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021777895.7U CN213116712U (en) | 2020-08-21 | 2020-08-21 | Anti-cavitation vertical multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213116712U true CN213116712U (en) | 2021-05-04 |
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ID=75655953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021777895.7U Active CN213116712U (en) | 2020-08-21 | 2020-08-21 | Anti-cavitation vertical multistage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213116712U (en) |
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2020
- 2020-08-21 CN CN202021777895.7U patent/CN213116712U/en active Active
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