CN202493484U - Constant-pressure pump - Google Patents
Constant-pressure pump Download PDFInfo
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- CN202493484U CN202493484U CN2012200116146U CN201220011614U CN202493484U CN 202493484 U CN202493484 U CN 202493484U CN 2012200116146 U CN2012200116146 U CN 2012200116146U CN 201220011614 U CN201220011614 U CN 201220011614U CN 202493484 U CN202493484 U CN 202493484U
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- impeller
- blade
- pump
- suction chamber
- pumping chamber
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- 238000009792 diffusion process Methods 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 238000013461 design Methods 0.000 description 13
- 239000007788 liquid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model discloses a constant-pressure pump which comprises a motor, a pump housing, an impeller, a water absorbing chamber, a water pressing chamber and a diffusion taper pipe, wherein the motor and the impeller are connected together through a through shaft and are arranged in the pump housing, the water absorbing chamber and the water pressing chamber are arranged in the pump housing, a pump cover is sealed in the inlet end of the pump housing, the diffusion taper pipe is arranged on one side of the top end of the pump housing, the impeller adopts a cyclone semi-opening impeller, and a blade outlet angle is more than a blade inlet angle. The blade outlet angle is more than the blade inlet angle, therefore the purposes of high lift, and high efficiency and low cost are achieved. The reliability is ensured by adopting a blade structure of combining a main blade and an auxiliary blade. Through reducing a clearance between the cyclone impeller and the front pump housing, the efficiency is increased and the noise is lowered.
Description
Technical field
The utility model relates to the water pump field, particularly, relates to a kind of constant pressure pump.
Background technique
At present, the constant voltage waterworks for firefighting all adopts the multistage centrifugal water pump both at home and abroad, is equipped with stable voltage frequency conversion variable-speed dynamic system; The performance of Centrifugal water pump is from the zero delivery to the design discharge; Lift changes greater than 20% of rated lift, if by the fire fighting supply requirement, during greater than design discharge; Originality can satisfy the lift requirement; Utilize the variable-frequency and variable-speed device increase after the motor speed could lift requirement, if when needing flow less than design, utilize the variable-frequency and variable-speed device reduce after the motor speed could lift requirement.But the variable-frequency and variable-speed systems technology is complicated, and investment is expensive, and whole water supply pipline system need be by the most high-lift design, and the cost of whole system will increase, and is difficult in ordinarily resident's housing-group, apply.
Another kind of fire water pump is a tangent pump, and tangent pump is claimed partial emission pump again, and the former Aero-Space that are used for are carried fuel oil to motor, and this pump duty is very little, and lift is constant basically with changes in flow rate, but efficient is lower than 50%; Noise was especially big when problem was the tangent pump running, and noise can reach 110 decibels more than when particularly closing dead point (zero delivery) and small flow.
In sum, in the process that realizes the utility model, the inventor finds to exist at least in the existing technology following defective:
⑴ system complex, fabricating cost is higher;
⑵ efficient is low, and noise is big.
Summary of the invention
The purpose of the utility model is, to the problems referred to above, proposes a kind of constant pressure pump, and is high with implementation efficiency, the advantage that cost is low.
For realizing above-mentioned purpose, the technological scheme that the utility model adopts is:
A kind of constant pressure pump comprises motor, pump case, impeller, suction chamber, pumping chamber and diffusion Taper Pipe, and said motor and impeller have an axis to link together; And be installed in the pump case; Be provided with suction chamber and pumping chamber in the said pump case, said pump cover is sealed in the pump case entrance point, and said diffusion Taper Pipe is arranged on a side on pump case top; Said impeller adopts the eddy flow semi-open impeller, and blade outlet angle is greater than inlet angle.
Further, said blade is combined by positive blade and back blades.
Further, relation is satisfied in said blade inlet edge and pump case gap:
gap≈b
2/10。
b
2Represent impeller outlet width
Further, said pumping chamber adopts spiral pumping chamber.
Further, said suction chamber adopts the straight-tapered suction chamber.
The technological scheme of the utility model through making blade outlet angle β greater than the α inlet angle, thereby reaches high-lift, high efficiency and purpose cheaply.Adopt the blade structure of chief and vice blade combination to guarantee reliability.Through reducing the gap between eddy flow impeller and the front pump shell,, reduce noise to raise the efficiency.
Further feature of the utility model and advantage will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through implementing the utility model.The purpose of the utility model can realize through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtain with other advantages.
Through accompanying drawing and embodiment, the technological scheme of the utility model is done further detailed description below.
Description of drawings
Accompanying drawing is used to provide the further understanding to the utility model, and constitutes the part of specification, is used to explain the utility model with the embodiment of the utility model, does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the described constant pressure pump of the utility model embodiment;
Fig. 2 is the blade view of the described constant pressure pump of the utility model embodiment.
In conjunction with accompanying drawing, reference character is following among the utility model embodiment:
1-impeller back blades; 2-water outlet diffusing tube; The 3-pump case; The 4-impeller blade; The 5-water sucking mouth; α-blade import steering angle; β-blade exit steering angle.
Embodiment
Describe below in conjunction with the preferred embodiment of accompanying drawing, should be appreciated that preferred embodiment described herein only is used for explanation and explains the utility model, and be not used in qualification the utility model the utility model.
Constant pressure pump as shown in Figure 1 comprises motor, pump case, impeller, suction chamber, pumping chamber and diffusion Taper Pipe, and motor and impeller have an axis to link together; And be installed in the pump case; Be provided with suction chamber and pumping chamber in the pump case, pump cover is sealed in the pump case entrance point, and the diffusion Taper Pipe is arranged on a side on pump case top; Impeller adopts the eddy flow semi-open impeller, and blade outlet angle is greater than inlet angle.Be β＞α, blade is combined by positive blade and back blades.Relation is satisfied in blade inlet edge and pump case gap:
gap≈b
2/10。
b
2The expression impeller outlet width
Pumping chamber adopts spiral pumping chamber.
Suction chamber is meant the overcurrent part of pump inlet flange to the preceding pump housing of impeller eye.The hydraulic loss of suction chamber is smaller relatively, but it is still indispensable parts in the water pump, and the quality of suction chamber design directly has influence on the pump cavitation performance.Therefore, during the design suction chamber, under the situation of hydraulic loss minimum, guarantee:
1) under the design conditions, in the impeller relative movement stable, must as much as possible evenly distribute along the flow velocity of all sections of suction chamber;
2) speed in the suction chamber is the required speed of impeller eye.
By structure, suction chamber can be divided into: bent tube type suction chamber, annular suction chamber, half-spiral suction chamber, straight-tapered suction chamber.
The elbow-shaped suction chamber is the form that often adopts in large-scale axial flow type water pump and the large centrifugal water pump.
The section configuration of each section of annular suction chamber is all identical, simple in structure with size, compactness; Shortcoming is to exist impacts and vortex, and the flow stream velocity skewness.Be mainly used in the sectional type multistage pump.
The half-spiral suction chamber is a kind of suction chamber form of extensive use, mainly is used in single-stage double-suction formula water pump, horizontal middle open type multistage pump, and in some other pump.
Straight-tapered suction chamber hydraulic performance is good, simple in structure, easily manufactured.Liquid flows in the straight-tapered suction chamber, and speed increases gradually, thereby velocity distribution is more tended to evenly, so the straight-tapered suction chamber is well positioned to meet requirement.The suction chamber of this form is widely used in the single-stage cantilever type water pump.
Pumping chamber is meant the overcurrent part of impeller outlet to the pump discharge flange, and it is the indispensable parts of any one vane type oil pump.The speed that liquid flows out from impeller is very big, but requires its speed to drop to certain size again in the liquid entering setting-out pipeline, to reduce linear loss and the local losses in the pipeline.Therefore, pumping chamber will be accomplished following task under the prerequisite of hydraulic loss minimum in centrifugal fire-fighting stabilized pressure pump: in impeller, forming stable relative movement condition, must guarantee that liquid is axisymmetric at the mobile of pumping chamber; Collect the high-speed liquid that flows out from impeller, and convert most of kinetic energy of liquid into the pressure ability, then, be transported to the setting-out pipeline, and in conversion process of energy, can not destroy the axisymmetric motion of flow in pumping chamber; Flow out the fluid of impeller, have very big velocity circulation, and liquid requires its velocity circulation to be substantially equal to zero after getting into the setting-out pipeline, so the 3rd effect of pumping chamber is to eliminate velocity circulation.
Facts have proved that the hydraulic loss in the pumping chamber is the important component part of hydraulic loss in the centrifugal fire-fighting stabilized pressure pump, and is more outstanding in off-design behaviour.Therefore, the quality of pumping chamber design is with the degree of perfection that determines pump to a great extent.
Constant voltage fire water pump pumping chamber can be divided into by its structure: spiral pumping chamber and blade type pumping chamber.
Although on design principle, even on concrete design method, spiral pumping chamber and blade type pumping chamber do not have difference in principle; But see from the hydraulic performance degree of perfection; Spiral pumping chamber has fairly perfect overcurrent shape, and adaptability is wider, the high efficient area broad of pump; And the overcurrent shape of blade type pumping chamber is just poorer, and adaptability is relatively poor, and high efficient area is narrower.See that from processing technology spiral pumping chamber overcurrent part can not be carried out machining, its physical dimension, geometrical shape and surface finishment will be guaranteed by casting technique fully; And the blade type pumping chamber is antithesis, its physical dimension, and geometrical shape and surface finishment can be carried out machining according to designing requirement.In the design of constant voltage fire water pump, select spiral pumping chamber.
The diffusion Taper Pipe is positioned at the back of spirality pumping chamber, and it act as the reduction flow velocity, makes part kinetic energy convert pressure energy into, to reduce hydraulic loss.The outlet of diffusion Taper Pipe is a delivery side of pump.
Motor is connected with pump and changes into direct-connectedly, and motor is coaxial with pump; Bearing housing and attachment portion (clutch) have been got by province.
In sum, the utility model adopts the eddy flow semi-open impeller, and blade outlet angle β 2 is bigger, and inlet angle β 1 is less, and is high-lift to guarantee to produce.Adopt centrifugal pump spiral casing, reduce the spiral case section,, raise the efficiency to reduce bump.Adopt the rotating speed of low specific-speed centrifugal pump, to reduce water pump volume and weight (high rotating speed 2900r/min).Adopt special blade structure,, improve operating reliability to reduce axial force and axially to reveal.Adopt the loose type gap design, reduce the gap between eddy flow impeller and the front pump shell,, reduce noise to raise the efficiency.
What should explain at last is: the above is merely the preferred embodiment of the utility model; Be not limited to the utility model; Although the utility model has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technological scheme that aforementioned each embodiment put down in writing, and perhaps part technical characteristics wherein is equal to replacement.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (5)
1. a constant pressure pump comprises motor, pump case, impeller, suction chamber, pumping chamber and diffusion Taper Pipe, and said motor and impeller link together with an axis; And be installed in the pump case, being provided with suction chamber and pumping chamber in the said pump case, said pump cover is sealed in the pump case entrance point; Said diffusion Taper Pipe is arranged on a side on pump case top; It is characterized in that said impeller adopts the eddy flow semi-open impeller, blade outlet angle is greater than inlet angle.
2. constant pressure pump according to claim 1 is characterized in that said blade is combined by positive blade and back blades.
3. constant pressure pump according to claim 1 is characterized in that, relation is satisfied in said blade inlet edge and pump case gap:
gap≈b
2/10
b
2Represent impeller outlet width.
4. constant pressure pump according to claim 1 is characterized in that said pumping chamber adopts spiral pumping chamber.
5. constant pressure pump according to claim 1 is characterized in that, said suction chamber adopts the straight-tapered suction chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200116146U CN202493484U (en) | 2012-01-11 | 2012-01-11 | Constant-pressure pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200116146U CN202493484U (en) | 2012-01-11 | 2012-01-11 | Constant-pressure pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202493484U true CN202493484U (en) | 2012-10-17 |
Family
ID=46999717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200116146U Expired - Fee Related CN202493484U (en) | 2012-01-11 | 2012-01-11 | Constant-pressure pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202493484U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046253A (en) * | 2021-09-09 | 2022-02-15 | 襄阳五二五泵业有限公司 | Vertical slurry pump adopting semi-open type double-suction impeller |
-
2012
- 2012-01-11 CN CN2012200116146U patent/CN202493484U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046253A (en) * | 2021-09-09 | 2022-02-15 | 襄阳五二五泵业有限公司 | Vertical slurry pump adopting semi-open type double-suction impeller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20180111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |