CN203655650U - Constant pressure pump - Google Patents
Constant pressure pump Download PDFInfo
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- CN203655650U CN203655650U CN201420031592.9U CN201420031592U CN203655650U CN 203655650 U CN203655650 U CN 203655650U CN 201420031592 U CN201420031592 U CN 201420031592U CN 203655650 U CN203655650 U CN 203655650U
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- impeller
- pump
- constant pressure
- pressure pump
- cover
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Abstract
The utility model provides a constant pressure pump. The constant pressure pump which is efficient mainly comprises a pump body, an impeller, a pump cover and a central shaft; the central shaft is a lengthening shaft of a motor; the pump cover is connected to the motor; the central shaft penetrates the pump cover; the impeller is fixed on the central shaft; the impeller is arranged inside the pump body; an blade outlet angle of the impeller is from 100 to 120 degrees; a blade inlet backward inclination angle is from 25 to 35 degrees; blades are bent again at positions which are close to outlets; the bending length is one fourth of the total length. The constant pressure pump has the advantages of being high in lift as a low specific rotary speed centrifugal pump, having a constant pressure character as a cyclone pump, being good in constant pressure performance, high in stability, high in efficiency, high in lift, low in noise, small in invest and free of blocking and the like.
Description
Technical field
The utility model relates to a kind of constant pressure pump, and it is a kind of effective constant press pump, belongs to centrifugal pump field.
Background technique
After 21 century, energy crisis is extremely urgent, and the demand of energy-conserving product is also increased sharply.The development of constant pressure pump is exactly a kind of novel high-efficiency and energy-saving product producing under this background.Along with quickening and the country of urbanization process ensure the increase dropping into safe drinking water, municipal administration, villages and small towns water supply project are built the demand of pump also in continuous increase.At present, generally apply the stable-pressure device of centrifugal pump and frequency conversion system composition in domestic and international market, it is expensive, just dresses up highly, and operation expense is also high, and concerning dropping into the villages and small towns water supply project of relative deficiency, this cost is even difficult to accept.And constant pressure pump has fundamentally been eliminated the drawback that exit of pump pressure changes with flow, save the converter plant of costliness and poor stability, reduce floor space and civilwork engineering quantity, improve Economy, the Security of whole water system.Except municipal water supply field, constant pressure pump also will be widely used in agricultural irrigation, and the prospect of fire-fighting domain is also very good.On the one hand, agricultural irrigation, fire fighting supply all require the pressure of water system not occur significantly to change with changes in flow rate, the constant-voltage characteristic of water system are had to higher requirement; On the other hand, domestic newly-increased tall building enormous amount, country is also very huge to sprinkling irrigation, drip irrigation scale of input, and fire-fighting and field of agricultural irrigation have huge demand to constant pressure pump.
Model utility content
The utility model has designed a kind of constant pressure pump, Ordinary Centrifugal Pumps and the working principle of torque flow pump is merged mutually, and redesign the structure of the pump housing and impeller.
The technical solution of the utility model is:
A kind of constant pressure pump, power source is motor, entirety is straight connection type structure, is mainly made up of the pump housing, impeller, pump cover, central shaft; Described central shaft is the extension shaft of motor; Described pump cover is connected on motor, and central shaft is through pump cover; Described impeller is fixed on central shaft; Impeller is arranged in the pump housing; The blade outlet angle of described impeller is within the scope of 100 °-120 °, and blade import tilt angle is backward 25-35 °, and blade is near outlet port bending again, and bending length is overall length 1/4.
Have an impeller cover mother at the top of described impeller, impeller is fixed on central shaft by impeller cover mother.
One side on the female arc of described impeller cover top adopts arc cutting shape.
Between described impeller and pump cover, carry out medium-tight by mechanical seal.
Between impeller and pump cover, be provided with link press span, the pump housing is connected by link press span with pump cover.
After impeller, the gap control of plate and link press span is at 0.3-0.5mm.
The pump housing suction port of the described pump housing adopts the structure lengthening, and the length of the pump housing suction port of described lengthening is 110-130mm.
Range of flow is 18-126m
3it is 2900r/min that the constant pressure pump of/h adopts rotating speed.
Range of flow is 144-252m
3it is 1450r/min that the constant pressure pump of/h adopts rotating speed.
The utility model has solved following subject matter: constant voltage.Close the peak rate of flow to valve wide open of the zero delivery at dead point from valve, lift changes <5%, realizes pressure-keeping functions; High efficiency.Equal flow, lift parameter, exceed 10 percentage points than tangent pump efficiency; High-lift.Single-stage lift reaches as high as 150m, equal lift, and impeller diameter is but little by 15% than single stage centrifugal pump; Low noise.Noise is less than 86dB, than traditional centrifugal pump and the low 20～40dB of tangent pump; Without stopping up.The large flow passage impeller of semi-open type has effectively been avoided the obstruction of the bad generation of water quality, and obstruction will affect whole technical data required for the pump; Low cost.Adopt straight connection type structure, high quality mechanical seal, volume is little, it is low to manufacture maintenance cost, and saved centrifugal pump and maintain the necessary frequency conversion speed-adjusting system of constant voltage.It had both had the high-lift of low specific-speed centrifugal pump, had again torque flow pump constant-voltage characteristic.Have constant voltage performance good, stability is high, and efficiency is high, and lift is high, and noise is low, invests the advantages such as little, nothing obstruction.
Accompanying drawing explanation
Fig. 1 is the generalized section of the utility model structure,
Fig. 2 a is the longitudinal profile schematic diagram of impeller,
Fig. 2 b is the floor map (in figure, right-hand part is sectional drawing) of impeller,
Fig. 3 is the female generalized section of impeller cover.
1 pump housing, 1-1 pump housing suction port, 2 impellers, 2-1 blade, 3 impeller cover mothers, 4 pump covers, 5 link press spans, 6 central shafts, 7 mechanical seals, 8 motors in figure.
Embodiment
As shown in Figure 1, the utility model is a kind of constant pressure pump, and its power source is motor 8, and entirety is straight connection type structure, is mainly made up of the pump housing 1, impeller 2, pump cover 4, central shaft 6.Described central shaft 6 is the extension shaft of motor 8.Described pump cover 4 is connected on motor 8.Central shaft 6 is through pump cover 4.Have an impeller cover mother 3 at the top of impeller 2, described impeller 2 is fixed on central shaft 6 by impeller cover mother 3, and a side B on the female 3 arc tops of impeller cover adopts the design of arc cutting shape, reduces drag losses, raises the efficiency.Impeller 2 is arranged in the pump housing 1, between impeller 2 and pump cover 4, carries out medium-tight by mechanical seal 7.Between impeller 2 and pump cover 4, be provided with link press span 5, the pump housing 1 is connected by link press span 5 with described pump cover 4.The gap control of the rear plate of impeller 2 and link press span 5, at 0.3-0.5mm, reduces headloss.
The pump housing suction port 1-1 of the described pump housing 1 adopts the little taper suction inlet structure of outer imperial palace lengthening, and object is even for guaranteeing flow velocity, reduces net positive suction head, raises the efficiency.The length of the pump housing suction port 1-1 of described lengthening is 110-130mm.Transition A between described pump housing protecgulum and pump housing suction port 1-1 adopts great circle arcuate structure, and object reduces eddy flow loss, raises the efficiency.
Described impeller 2 is the brand-new large half-open impeller of runner, adopts wide runner blade design, realizes full flow without obstruction.At present, the conventional impeller blade exit angle of impeller is less than 90 °, and blade 2-1 exit angle α described in the utility model is within the scope of 100 °-120 °.Blade 2-1 import angle of inclination beta is backward 25-35 °, can be preferably 30 °, and blade 2-1 is near outlet port bending again, and bending length is overall length 1/4.This kind of design improved constant voltage performance.
The range of flow 18-126m of the utility model constant pressure pump
3it is 2900r/min that the pump of/h adopts rotating speed, 144-252m
3it is 1450r/min that the pump of/h adopts rotating speed, and object, for having reduced noise, has improved Safety performance.The utility model single-stage lift is 30-150m, and interval 10m increases progressively successively, by CFD software for calculation, full runner is carried out to numerical simulation, is optimized design and calculates, tests, and has guaranteed high efficiency.
Claims (9)
1. a constant pressure pump, power source is motor (8), entirety is straight connection type structure, it is characterized in that: be mainly made up of the pump housing (1), impeller (2), pump cover (4), central shaft (6); Described central shaft (6) is the extension shaft of motor (8); It is upper that described pump cover (4) is connected to motor (8), and central shaft (6) is through pump cover (4); Described impeller (2) is fixed on central shaft (6); Impeller (2) is arranged in the pump housing (1); Blade (2-1) exit angle (α) of described impeller (2) is within the scope of 100 °-120 °, blade (2-1) import tilt angle (β) is backward 25-35 °, blade (2-1) is near outlet port bending again, and bending length is overall length 1/4.
2. constant pressure pump according to claim 1, it is characterized in that: have an impeller cover mother (3) at the top of described impeller (2), impeller (2) is fixed on central shaft (6) by impeller cover mother (3).
3. constant pressure pump according to claim 2, is characterized in that: a side (B) on described impeller cover mother (3) arc top adopts arc cutting shape.
4. constant pressure pump according to claim 1 and 2, is characterized in that: between described impeller (2) and pump cover (4), carry out medium-tight by mechanical seal (7).
5. constant pressure pump according to claim 4, it is characterized in that: between impeller (2) and pump cover (4), be provided with link press span (5), the pump housing (1) is connected by link press span (5) with pump cover (4).
6. constant pressure pump according to claim 5, is characterized in that: after impeller (2), the gap control of plate and link press span (5) is at 0.3-0.5mm.
7. constant pressure pump according to claim 1, is characterized in that: the pump housing suction port (1-1) of the described pump housing (1) adopts the structure lengthening, and the length of the pump housing suction port (1-1) of described lengthening is 110-130mm.
8. constant pressure pump according to claim 1, is characterized in that: range of flow is 18-126m
3it is 2900r/min that the constant pressure pump of/h adopts rotating speed.
9. constant pressure pump according to claim 1, is characterized in that: range of flow is 144-252m
3it is 1450r/min that the constant pressure pump of/h adopts rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420031592.9U CN203655650U (en) | 2014-01-20 | 2014-01-20 | Constant pressure pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420031592.9U CN203655650U (en) | 2014-01-20 | 2014-01-20 | Constant pressure pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203655650U true CN203655650U (en) | 2014-06-18 |
Family
ID=50922043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420031592.9U Expired - Fee Related CN203655650U (en) | 2014-01-20 | 2014-01-20 | Constant pressure pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203655650U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958506A (en) * | 2021-07-31 | 2022-01-21 | 高涛 | Centrifugal pump |
-
2014
- 2014-01-20 CN CN201420031592.9U patent/CN203655650U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958506A (en) * | 2021-07-31 | 2022-01-21 | 高涛 | Centrifugal pump |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20200120 |