CN206513614U - Axle stream wheel applied to high-efficiency double suction pump - Google Patents
Axle stream wheel applied to high-efficiency double suction pump Download PDFInfo
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- CN206513614U CN206513614U CN201720107869.5U CN201720107869U CN206513614U CN 206513614 U CN206513614 U CN 206513614U CN 201720107869 U CN201720107869 U CN 201720107869U CN 206513614 U CN206513614 U CN 206513614U
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- axle
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Abstract
The utility model discloses a kind of axle stream wheel applied to high-efficiency double suction pump, it includes：First small key, the second small key, axle stream wheel, centrifugal pump impeller, big key, O-ring, machine envelope axle sleeve, axle, upper flange, lower flange, first small key, the second small key and big key are all located in axle, first small key, the second small key are located at big key both sides respectively, axle stream wheel body is located at outside axle, centrifugal pump impeller is located on axle stream wheel body, O-ring is located between axle stream wheel body and axle, machine envelope axle sleeve is connected with O-ring, machine envelope axle sleeve is located on the outside of axle, upper flange and lower flange are individually fixed in the two ends of axle, and one end of axle is provided with groove.The utility model improves the anti-cavitation performance of high-efficiency double suction pump applied to the axle stream wheel of high-efficiency double suction pump, reduces pump maintenance times, reduction pump vibration and noise.
Description
Technical field
The utility model is related to a kind of axle stream wheel, more particularly to a kind of axle stream wheel applied to high-efficiency double suction pump.
Background technology
For general Centrifugal Pump Design, efficient performance is exchanged for sacrifice anti-cavitation performance, be one to liquidate both this
Prominent design element, it is difficult to meet, many times to meet anti-cavitation performance requirement, just sacrifices the efficiency of pump.Specific drawback master
Show the following aspects；
First, from the point of view of Centrifugal Impeller Design, big import coefficient is taken to increase the anti-cavitation performance of pump, but can increase simultaneously
The leakage rate of seal ring is encrypted, the volumetric efficiency of pump is reduced.
2nd, from the point of view of pump configuration design, it is by adding inducer, the efficient leaf of script that general pump, which improves anti-cavitation performance,
Wheel, after increase inducer, upsets inlet flow field, while the efficiency of inducer is general very low, only considers to improve pump during design
Anti-cavitation performance, without taking into account hydraulic efficiency.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of axle stream wheel applied to high-efficiency double suction pump, improves
The anti-cavitation performance of high-efficiency double suction pump, reduces pump maintenance times, reduction pump vibration and noise.
The utility model is to solve above-mentioned technical problem by following technical proposals：One kind is applied to high-efficiency double suction pump
Axle stream wheel, it is characterised in that it include the first small key, the second small key, axle stream wheel, centrifugal pump impeller, big key, O-ring, machine envelope
Axle sleeve, axle, upper flange, lower flange, the first small key, the second small key and big key are all located in axle, the first small key, the second small key difference
Positioned at big key both sides, axle stream wheel body is located at outside axle, and centrifugal pump impeller is located on axle stream wheel body, and O-ring is located at axle stream wheel sheet
Between body and axle, machine envelope axle sleeve is connected with O-ring, and machine envelope axle sleeve is located on the outside of axle, and upper flange and lower flange are individually fixed in axle
Two ends, one end of axle is provided with groove.
Preferably, the axle stream wheel body is provided with multiple blades.
Positive effect of the present utility model is：The utility model axle stream wheel is mostly installed at double-suction pump impeller two
Side, pressure is provided for impeller inlet liquid stream, so as to prevent double-suction pump impeller cavitation, reduces maintenance cost；Because axle stream wheel can root
Has centrifugal impeller parameter designing, this is than traditional inducer efficiency high, so that the efficiency influence on pump in itself is very low, this is also just solved
The cavitation hazard of double entry pump, but the problem of do not reduce the efficiency of pump.
Brief description of the drawings
Fig. 1 is the structural representation for the axle stream wheel that the utility model is applied to high-efficiency double suction pump.
Fig. 2 is the structural representation of the utility model Axial-Flow wheel body.
Embodiment
The utility model preferred embodiment is provided below in conjunction with the accompanying drawings, to describe the technical solution of the utility model in detail.
As depicted in figs. 1 and 2, the utility model includes the first small key 11, second applied to the axle stream wheel of high-efficiency double suction pump
Small key 12, axle stream wheel body 2, centrifugal pump impeller 3, big key 4, O-ring 5, machine envelope axle sleeve 6, axle 7, upper flange 81, lower flange 82,
First small key 11, the second small key 12 and big key 4 are all located in axle 7, and the first small key 11, the second small key 12 are located at big 4 liang of key respectively
Side, axle stream wheel body 2 be located at axle 7 outside, centrifugal pump impeller 3 be located at axle stream wheel body 2 on, O-ring 5 be located at axle stream wheel body 2 with
Between axle 7, machine envelope axle sleeve 6 is connected with O-ring 5, and machine envelope axle sleeve 6 is located at the outside of axle 7, and upper flange 81 and lower flange 82 are fixed respectively
In the two ends of axle 7, one end of axle 7 is provided with groove 9.
Axle stream wheel body 2 is provided with multiple blades 21, so improves flow stream pressure.
Cavitation can often occur in the application for double entry pump, cavitation be exactly liquid at a certain temperature, reduction pressure to the temperature
Under degree during pressure for vaporization, liquid just produces gassiness bubble, but after liquid stream flows into centrifugal pump impeller, by turbine centrifugal
Power is done work, and flow stream pressure rise, bubble is crumbled and fall, and surrounding fluid particle will occur mutual with high-speed filling hole when bubble is crumbled and fall
Hit and form strong-water-impact, destruction flow passage components surface, and along with dither and noise.Axle of the present utility model can lead to
Excessive key with moving axis stream wheel body to enter centrifugal impeller before liquid stream do work, flow stream pressure is raised in advance, so it is avoided that
The generation of bubble, so as to prevent the generation of destruction, reduces the generation of cavitation.For common double entry pump, centrifugal pump impeller two
Only organic envelope axle sleeve and O-ring are held, can seal the length of axle sleeve anti-cavitation axle stream wheel be installed by shortening machine, this can also be to general
Logical double entry pump, which carries out high-cavitation-resistance, to be transformed.For pump operation, the generation of cavitation is reduced, is also just reduced because cavitation causes
Vibration, noise and impeller the problems such as destroy, so as to reduce the maintenance times of pump.The effect of O-ring is to prevent fluid-flow contact
Corrosion is produced to axle to axle.Upper flange and lower flange mainly play the whole axle of support, and convenient connection other elements.First
Small strong and the second small strong effect is with motivation envelope axle sleeve rotation.
The utility model is that, applied to single-stage double-suction centrifugal pump, axial wheel is set by being got in axial-flow pump design theory
Meter is theoretical more ripe, and the flow of axle stream wheel is the half of double suction pump discharge, and rotating speed is identical with double entry pump, and lift can be according to pump
Necessary net positive suction head and setting height(from bottom) etc. are determined, also can determine lift according to the efficient specific speed scope of axial-flow pump, appropriate in selection
After specific speed, efficiency can also accomplish 85% or so.By axle stream wheel to being done work in advance into impeller liquid stream, increase flow stream pressure, have
Effect prevents liquid stream from vaporizing, so as to improve centrifugal impeller anti-cavitation performance；For single-stage double-suction centrifugal pump, pump will not be also reduced
The efficiency of itself.How much is specific net positive suction head raising, depending on the lift that generation is designed according to axle stream wheel.This is just largely carried
Height can budget type, for pump with operating mode have and clearly define.Groove is convenient to be engaged with other elements.
Axle stream wheel of the present utility model passes through the net positive suction head to be improved, the flow of pump, Design of Rotation and meets needs
Product.After die sinking, casting, processing, axle stream wheel is arranged on single-stage double-suction centrifugal pump impeller inlet both sides, with key band moving axis
Stream wheel rotation, to prevent liquid stream from entering bearing housing, adds O-ring to seal at axle stream wheel two ends, is revolved sealing axle sleeve by key band motivation
Turn, and then liquid stream is done work.
Theoretical foundation of the present utility model is that the necessary net positive suction head of centrifugal impeller is such as formula（1）：
NPSHr=v0^2/(2g)+ λω0^2/(2g)………………………（1）
V0 is impeller inlet speed in formula, and ω 0 is impeller inlet relative velocity, and NPSHr is must net positive suction head.G attaches most importance to
Power acceleration, λ is entrance pressure drop coefficient.
As seen from the above equation, after having axle stream wheel, it can reduce for impeller inlet relative velocity ω 0, so can be by low pump
Necessary net positive suction head, increase pump setting height(from bottom)；500 can be all more than for axle stream wheel specific speed, thus in design axle stream
During impeller, big flow is met, low lift, for centrifugal pump, impeller lift is higher, and the efficiency of such axle stream wheel is to whole pump
Efficiency influence is smaller, and axle stream wheel often increases by one meter of lift, and the necessary net positive suction head of pump reduces one meter.Anti-cavitation performance improves one
Rice.
The utility model can improve single-stage double-suction centrifugal pump anti-cavitation performance, widen the use condition of pump, while can also subtract
Noise and vibration that few pump cavitation occurs, increase the service life of pump and the stability and reliability of pump operation；To the original effect of pump
Rate influence is little, it is ensured that efficiently, is designed for axle stream wheel, can use axial-flow pump design method, design with single-stage double-suction from
The axle stream wheel that heart pump efficiency is more or less the same, while by control shaft stream wheel outlet edge position and the angle of outlet, to centrifugal impeller import
The raw certain positive pre-selection of liquid miscarriage, reduces import impact loss, improves the way, it is easy to design, manufacture；Maintenance side is installed
Just, it is driven using key, only need to dismantles rotor, when cavitation occurs for pump, the simply axle stream wheel of damage, by changing axle stream wheel
, the cost for changing impeller can be lowered；Little is changed to pump original structure, need to only shorten machine envelope axle sleeve, without changing rotor
Total length, for existing every single-stage double-suction centrifugal pump, only needs flow, lift, rotating speed to design corresponding axle stream wheel,
Original machine envelope axle sleeve is shortened during installation, for newly-designed double entry pump, can be considered at the beginning of design.
Particular embodiments described above, to the technical problem, technical scheme and beneficial effect of solution of the present utility model
It is further described, should be understood that and the foregoing is only specific embodiment of the utility model, not
For limiting the utility model, all any modifications within spirit of the present utility model and principle, made, equivalent substitution, change
Enter, should be included within protection domain of the present utility model.
Claims (2)
1. a kind of axle stream wheel applied to high-efficiency double suction pump, it is characterised in that it include the first small key, the second small key, axle stream wheel,
Centrifugal pump impeller, big key, O-ring, machine envelope axle sleeve, axle, upper flange, lower flange, the first small key, the second small key and big key are all located at
In axle, the first small key, the second small key are located at big key both sides respectively, and axle stream wheel body is located at outside axle, and centrifugal pump impeller is located at axle stream
Take turns on body, O-ring is located between axle stream wheel body and axle, machine envelope axle sleeve is connected with O-ring, machine envelope axle sleeve is located on the outside of axle,
Upper flange and lower flange are individually fixed in the two ends of axle, and one end of axle is provided with groove.
2. the axle stream wheel according to claim 1 applied to high-efficiency double suction pump, it is characterised in that on the axle stream wheel body
Provided with multiple blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720107869.5U CN206513614U (en) | 2017-02-04 | 2017-02-04 | Axle stream wheel applied to high-efficiency double suction pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720107869.5U CN206513614U (en) | 2017-02-04 | 2017-02-04 | Axle stream wheel applied to high-efficiency double suction pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206513614U true CN206513614U (en) | 2017-09-22 |
Family
ID=59867442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720107869.5U Active CN206513614U (en) | 2017-02-04 | 2017-02-04 | Axle stream wheel applied to high-efficiency double suction pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206513614U (en) |
-
2017
- 2017-02-04 CN CN201720107869.5U patent/CN206513614U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Pengju Inventor after: Lu Yinhua Inventor after: Chen Zhaofeng Inventor before: Xue Jiankang Inventor before: Chen Zhaofeng Inventor before: Chen Bo |
|
| CB03 | Change of inventor or designer information | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200120 room 103, Pujian Road, Pudong New Area, Shanghai, 103 Patentee after: Shanghai Rui Chen environmental protection Polytron Technologies Inc Address before: 200120 room 103, Pujian Road, Pudong New Area, Shanghai, 103 Patentee before: Shanghai Richen Environmental Technology Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |