CN209724682U - A kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer - Google Patents
A kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer Download PDFInfo
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- CN209724682U CN209724682U CN201920349977.2U CN201920349977U CN209724682U CN 209724682 U CN209724682 U CN 209724682U CN 201920349977 U CN201920349977 U CN 201920349977U CN 209724682 U CN209724682 U CN 209724682U
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- inducer
- cavitation
- throat bushing
- pump
- intermediate bulkhead
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Abstract
The utility model discloses a kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer, including main shaft (1), inducer (2), inlet segment (3), intermediate bulkhead (4), throat bushing (5), middle section (6), first stage impeller (11) and first-level guide blade (12), the inner circle for the inlet segment (3) that throat bushing (5) is installed on by fixing screws, intermediate bulkhead (4) is fixed between inlet segment (3) and middle section (6), inducer (2) is installed in throat bushing (5) and is fixed on the main shaft (1) of centrifugal multistage pump multiple centrifugal pump by flat key connection type, the outer circle wheel hub of first stage impeller (11) is nested in the inner circle of throat bushing (5), first-level guide blade (12) is fixed on the rear end face of intermediate bulkhead (4) by way of positioning pin.The centrifugal multistage pump multiple centrifugal pump not only has high-cavitation-resistance energy, while structure is simple, convenient for safeguarding and maintenance.
Description
Technical field
The utility model relates to fluid conveyings and equipment technology field, especially a kind of to be suitable for mine, chemical industry, power plant etc.
Convey the centrifugal multistage pump multiple centrifugal pump of water or the medium containing a small amount of solid particle, and in particular to a kind of high-cavitation-resistance with inducer
It can centrifugal multistage pump multiple centrifugal pump.
Background technique
At a certain temperature, when reducing pressure to pressure for vaporization at this temperature, liquid just generates steam bubble, this production to liquid
The phenomenon that anger is steeped referred to as cavitation.The bubble generated when cavitation, when flowing at high pressure, volume reduces so that vanishing.It is this
The phenomenon that rising bubble collapse in a liquid due to pressure referred to as cavitation collapse.
It pumps in operation, if the regional area of its flow passage components is usually the somewhere of impeller blade import later because of certain
Reason, pump liquid absolute pressure be reduced at that time at a temperature of liquid pressure for vaporization when, liquid is just begun vaporization at this,
Generate a large amount of steam, form bubble, when the liquid containing a large amount of bubbles forward through the higher-pressure region in impeller when, height around bubble
Press liquid causes bubble sharp to reduce so that rupturing.While bubble is condensed and ruptured, liquid particle is filled out with very high speed
Hole is filled, very strong water hammer is generated in this moment, and metal surface is hit with very high frequency of impact, impact stress can
Up to hundreds to thousands atmospheric pressure, frequency of impact can puncture wall thickness when serious up to tens of thousands of times per second.
Bubble and bubbles burst are generated in water pump makes flow passage components by the cavitation that the process of destruction is exactly in water pump
Process.After water pump generation cavitation other than it can generate destruction to flow passage components, noise and vibration can be also generated, and cause
The performance of pump declines, and when serious liquid in pump can interrupt, cisco unity malfunction.
At present to prevent centrifugal multistage pump multiple centrifugal pump from cavitation occurs, the vibration generated when reducing multistage centrifugal pump operation and noise are mentioned
The service life of height pump needs to change or improve by structure the resistance to cavitation performance of centrifugal multistage pump multiple centrifugal pump first stage impeller, could really
Pump is protected in the case where inlet pressure is slightly insufficient and medium is easy vaporization, centrifugal multistage pump multiple centrifugal pump can safely and reliably be run.For
Reach centrifugal multistage pump multiple centrifugal pump service condition, only reduce the import net positive suction head of centrifugal multistage pump multiple centrifugal pump, and joins in revolution speed and flow
In the case that number has determined, it can only improve and optimize in the structure of pump.
In consideration of it, needing a kind of high-cavitation-resistance energy with inducer to improve the anti-cavitation performance of centrifugal multistage pump multiple centrifugal pump
Centrifugal multistage pump multiple centrifugal pump.
Summary of the invention
The purpose of this utility model is to provide a kind of the high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer, structure
It is simple with processing technology, while there is high-cavitation-resistance energy.
To achieve the above object, the technical solution of the utility model is as follows:
A kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer, including main shaft, inducer, inlet segment, middle interval
Plate, throat bushing, middle section, first stage impeller and first-level guide blade, the inner circle for the inlet segment that wherein throat bushing is installed on by fixing screws
Place, intermediate bulkhead are fixed between inlet segment and middle section, and inducer is installed in throat bushing and is fixed by flat key connection type
In on the main shaft of centrifugal multistage pump multiple centrifugal pump, the outer circle wheel hub of first stage impeller is nested in the inner circle of throat bushing, and first-level guide blade passes through positioning
The mode of pin is fixed on the rear end face of intermediate bulkhead.
The throat bushing diameter is slightly larger than the maximum outside diameter for inducing impeller blade, throat bushing inner circle and first stage impeller wheel
Hub outer circle is connected with gap fiting mode.
The front end setting boss structure of the intermediate bulkhead is matched with the groove structure of inlet segment, after intermediate bulkhead
End setting groove structure is matched with the boss structure in middle section.
Four location holes are arranged in the intermediate bulkhead rear end face, and four location holes are arranged in the front end face of first-level guide blade, in
The location hole of spacing board and the location hole of first-level guide blade match.
Shown in the outer circle of throat bushing four cylindrical holes are set, four threaded holes, throat bushing is arranged in the rear end face of inlet segment
The cylindrical hole of outer circle and the threaded hole of inlet segment match.
The beneficial effects of the utility model are as follows: a kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer, a side
The lift that the face centrifugal multistage pump multiple centrifugal pump is generated using inducer plays pressurization to subsequent centrifugal pump impeller, improves multistage pump
Intake performance and anti-cavitation performance；On the other hand, inducer is installed in throat bushing, and throat bushing can play the work of water conservancy diversion
With when so that fluid media (medium) entering first stage impeller by inducer, fluid energy losses are less.In addition, inlet segment and middle section it
Between intermediate bulkhead is set, convenient for the disassembly and replacement of inducer, structure is simple, it is convenient for safeguarding with maintenance.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer of the utility model.
Fig. 2 is the main view of intermediate bulkhead.
Fig. 3 is the right view of intermediate bulkhead.
In the figure, it is marked as 1: main shaft；2: inducer；3: inlet segment；4: intermediate bulkhead；5: throat bushing；6: middle section；7: positioning
Hole；8: cylindrical hole；9: boss structure；10: groove structure；11: first stage impeller；12: first-level guide blade.
Specific embodiment
Below in conjunction with attached drawing 1,2 and 3, one embodiment of the utility model is further described:
A kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer, including main shaft 1, inducer 2, inlet segment
3, intermediate bulkhead 4, throat bushing 5, middle section 6, first stage impeller 11 and first-level guide blade 12, wherein throat bushing 5 is installed by fixing screws
In inlet segment 3 inner circle, intermediate bulkhead 4 is fixed between inlet segment 3 and middle section 6, and inducer 2 is installed in throat bushing 5
And be fixed on the main shaft 1 of centrifugal multistage pump multiple centrifugal pump by flat key connection type, the outer circle wheel hub of first stage impeller 11 is nested in throat bushing 5
Inner circle, first-level guide blade 12 is fixed on the rear end face of intermediate bulkhead 4 by way of positioning pin.
5 diameter of throat bushing is slightly larger than the maximum outside diameter of 2 blade of inducer, 5 inner circle of throat bushing and chopped-off head leaf
11 wheel hub outer circles are taken turns to connect with gap fiting mode.
The front end setting boss structure 9 of the intermediate bulkhead 4 is matched with the groove structure of inlet segment 3, intermediate bulkhead 4
Rear end setting groove structure 10 matched with the boss structure in middle section 6.
Four location holes 7 are arranged in 4 rear end face of intermediate bulkhead, and four positioning are arranged in the front end face of first-level guide blade 12
Hole, the location hole 7 of intermediate bulkhead 4 and the location hole of first-level guide blade 12 match.
Shown in the outer circle of throat bushing 5 four cylindrical holes 8 are set, four threaded holes, throttling is arranged in the rear end face of inlet segment 3
The cylindrical hole 8 and the threaded hole of inlet segment 3 for covering 5 outer circles match.
Claims (5)
1. a kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer, including main shaft (1), inducer (2), inlet segment (3),
Intermediate bulkhead (4), throat bushing (5), middle section (6), first stage impeller (11) and first-level guide blade (12), it is characterised in that: throat bushing (5)
The inner circle for the inlet segment (3) being installed on by fixing screws, intermediate bulkhead (4) be fixed on inlet segment (3) and middle section (6) it
Between, inducer (2) is installed in throat bushing (5) and is fixed on the main shaft (1) of centrifugal multistage pump multiple centrifugal pump by flat key connection type, first
The outer circle wheel hub of grade impeller (11) is nested in the inner circle of throat bushing (5), and first-level guide blade (12) is fixed by way of positioning pin
In on the rear end face of intermediate bulkhead (4).
2. a kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer according to claim 1, it is characterised in that: institute
Throat bushing (5) diameter stated is slightly larger than the maximum outside diameter of inducer (2) blade, throat bushing (5) inner circle and first stage impeller
(11) wheel hub outer circle is connected with gap fiting mode.
3. a kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer according to claim 1, it is characterised in that: institute
Front end setting boss structure (9) for the intermediate bulkhead (4) stated is matched with the groove structure of inlet segment (3), intermediate bulkhead (4)
Rear end setting groove structure (10) is matched with the boss structure of middle section (6).
4. a kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer according to claim 1, it is characterised in that: institute
Four location holes (7) are arranged in intermediate bulkhead (4) rear end face stated, and four location holes are arranged in the front end face of first-level guide blade (12), in
The location hole (7) of spacing board (4) and the location hole of first-level guide blade (12) match.
5. a kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer according to claim 1, it is characterised in that: institute
Four cylindrical holes (8) are arranged in the outer circle of the throat bushing (5) shown, and four threaded holes, throat bushing is arranged in the rear end face of inlet segment (3)
(5) cylindrical hole (8) and the threaded hole of inlet segment (3) of outer circle match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920349977.2U CN209724682U (en) | 2019-03-19 | 2019-03-19 | A kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920349977.2U CN209724682U (en) | 2019-03-19 | 2019-03-19 | A kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209724682U true CN209724682U (en) | 2019-12-03 |
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ID=68687308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920349977.2U Expired - Fee Related CN209724682U (en) | 2019-03-19 | 2019-03-19 | A kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209724682U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855608A (en) * | 2021-01-28 | 2021-05-28 | 浙江理工大学 | Wheel hub inducer that cooperation has support column |
-
2019
- 2019-03-19 CN CN201920349977.2U patent/CN209724682U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855608A (en) * | 2021-01-28 | 2021-05-28 | 浙江理工大学 | Wheel hub inducer that cooperation has support column |
| CN112855608B (en) * | 2021-01-28 | 2022-07-01 | 浙江理工大学 | Wheel hub inducer that cooperation has support column |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191203 Termination date: 20210319 |