CN202431539U - Total-head submersible electric pump - Google Patents
Total-head submersible electric pump Download PDFInfo
- Publication number
- CN202431539U CN202431539U CN2011205358503U CN201120535850U CN202431539U CN 202431539 U CN202431539 U CN 202431539U CN 2011205358503 U CN2011205358503 U CN 2011205358503U CN 201120535850 U CN201120535850 U CN 201120535850U CN 202431539 U CN202431539 U CN 202431539U
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- pump
- motor
- water pump
- submersible electric
- head
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Abstract
The utility model relates to a total-head submersible electric pump which comprises a centrifugal pump with a low specific speed and a submersible motor, wherein a linking frame between the motor and a water pump is served as a linking part of the motor and the water pump as well as an inlet of the water pump; a rib plate of the linking frame is not in a radial radiating form but is in a slant straight form; an intersection point of a centre line of the rib plate and the periphery of the inlet of an impeller is taken as a vertex; and an inclined angle between the centre line of the rib plate and the radial radiating ray of the vertex is more than 10 degrees. The submersible electric pump with low specific speed manufactured according to the utility model has the total-head overload-free characteristics; the submersible electric pump can be effectively and reliably used under a high-head small-flow working condition and also can be safely overload-free used under a low-head high-flow working condition; the impeller with low specific speed of the total-head submersible electric pump is easily cast; and the efficiency of the water pump is higher.
Description
Technical field
The present invention is a kind of low specific speed Submerged Motor Pumps, especially should under high-lift low flow rate condition, use the overload free low specific speed Submerged Motor Pumps of the total head that also will under the low lift and large flow rate operating mode, use.
Background technique
At present; Known low specific speed centrifugal pump all exists pump shaft power to reduce the rule that increases with lift; When the power of necessary electromotor is not too big; Low specific speed centrifugal pump can only safe operation under high-lift operating mode, if under the low lift operating mode, use, and will the power overload and burn out motor.But a lot of low specific speed submersible pumps all can move the place to use, and use today under high-lift low flow rate condition, and possibly use under the low lift and large flow rate operating mode tomorrow, and this will take place that power overloads and the accident that burns out motor.Perhaps force us adopt the method for low load with strong power, supporting high power motor has strengthened investment so again, has wasted the energy.
As far back as the eighties in last century, colleague's brainstrust does not have the overload problem with regard to the total head of the low specific speed Submerged Motor Pumps that begins one's study.1989, the mechanical facilities of irrigation and drainage fourth phase was reported " full high-lift submersible electric pump appearance ", and this " full high-lift submersible electric pump " is exactly the low specific speed Submerged Motor Pumps that can total head have overlond running.
No. 89212885.2 patents of existing patented technology " the involute impeller that is used for rotary type fluid machine ", No. 90214606.8 patents " a kind of nothing overload low specific speed centrifugal pump impeller " and ZL200410014937.0 patent of invention " a kind of low specific speed centrifugal pump impeller design method " etc.; Improve the Changing Pattern of low specific speed centrifugal pump air horsepower through changing the impeller design method; Though obtained obvious effects but still had some problems: 1. too greatly perhaps the runner gap is too little for the cornerite of impeller blade, has increased difficulty to casting technique; 2. when improving low specific speed centrifugal pump air horsepower Changing Pattern,, pump efficiency is difficult to be up to state standards the energy-saving index of regulation to such an extent as to decreasing.Above technical problem has seriously restricted the development of " full high-lift submersible electric pump ".
Summary of the invention
In order to overcome the deficiency of existing full high-lift submersible electric pump; The present invention provides a kind of novel full high-lift submersible electric pump; Make the low specific speed Submerged Motor Pumps can safe operation under high-lift low flow rate condition; Can under the low lift and large flow rate operating mode, reliably use again, and the impeller manufacturing is easier, pump efficiency is also higher.
Technological scheme of the present invention is:
The present invention is made up of a low specific speed centrifugal pump and a submersible motor jointly; Couplet frame between motor and the water pump is not only the connecting piece of motor and water pump; And be the import of water pump, its main innovation is: the gusset that joins frame is not radioactive rays radially, but oblique straight line; And the intersection point with gusset center line and impeller inlet circumference is the summit, and the angle of the radially radioactive rays on gusset center line and summit is greater than 10 degree.
The gusset that joins on the frame is the important component part that joins frame; Existing frame gusset all is radioactive rays radially; Except connecting motor and water pump, also to let current pass through the space entering water pump between gusset because join the effect of frame gusset; The radially gusset of radioactive rays material saving not only, and the space between gusset is also maximum.
But; Radially the gusset of radioactive rays is an irrotationality before making current get into impeller; Existing full high-lift submersible electric pump is only known through the geometric parameter that changes impeller outlet and is realized that total head does not have overload; Not knowing that import has to revolve and can realize that also total head does not have overload, is that the gusset of oblique straight line is creationary so change the gusset of radioactive rays radially.Current around the water pump through behind the gusset of oblique straight line just so that the flow entering impeller that revolves to be arranged, and flow is big more, rotational speed is also big more.And the centrifugal pump basic theories is told us, and the rotational speed of impeller inlet flow is big more, and centrifugal lift of pump is just low more, and its pump power is just more little naturally, does not have overload so just can realize the total head of low specific speed centrifugal pump.
The present invention has stipulated the angle of radially radioactive rays on gusset center line and summit greater than 10 degree, and this is in order to evade tilting that existing frame gusset possibly take place in the mill, believe since foozle takes place tilting can be greater than 10 degree.And, can only make flow produce very little rotational speed less than the gusset of 10 degree angles, can not effectively improve the no overload characteristic of low specific speed Submerged Motor Pumps, so needn't protect.
Because getting into the velocity vector of impeller inlet, the present invention has bigger circumferential speed component; And the sense of rotation of flow is identical with the sense of rotation of impeller; The flow angle of impeller inlet is just bigger, and therefore impeller inlet laying angle of the present invention is also done very greatly, and this reduces many with regard to the cornerite that makes impeller blade; Make impeller cast than be easier to, pump efficiency also increases.
The invention has the beneficial effects as follows; Have total head with the low specific speed Submerged Motor Pumps of manufacturing of the present invention and do not have overload characteristic; Not only can under high-lift low flow rate condition, high-efficiency reliable use, can also guarantee the overload free use of safety under the low lift and large flow rate operating mode of this pump.And low specific speed impeller of the present invention casting is than being easier to, and pump efficiency is also than higher.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 and Fig. 2 are existing full high-lift submersible electric pump schematic representation, and Fig. 2 is (cuing open) view of bowing of Fig. 1.
Fig. 3 and Fig. 4 are the schematic representation of one embodiment of the invention, and Fig. 4 is (cuing open) view of bowing of Fig. 3.
Among the figure: 1. submersible motor, 2. inlet strainer, 3. couplet frame, 4. low specific speed centrifugal pump, 5. impeller, the 6. gusset of couplet frame, 7. summit, 8. gusset center line, 9. impeller inlet circumference, the 10. angle of the radially radioactive rays on gusset center line and summit.
Embodiment
Fig. 3 and Fig. 4 form embodiment jointly, and it is made up of a low specific speed centrifugal pump 4 and a submersible motor 1 jointly, and the couplet frame 3 between motor and the water pump is not only the connecting piece of motor and water pump, and is the import of water pump.When the present invention worked in water, water got into from inlet strainer 2 and joins framves 3, at the guiding of the gusset 6 that joins frame 3 entering impeller 5 down, got water pump to water through impeller 5 again.Its main innovation is: the gusset 6 that joins frame 3 is not radioactive rays radially, but oblique straight line, and the angle 10 of gusset center line 8 and the radially radioactive rays on summit 7 is greater than 10 degree.Wherein, summit 7 is intersection points of gusset center line 8 and impeller inlet circumference 9.The creativeness of present embodiment is to change the gusset 6 that joins frame into oblique straight line from radioactive rays radially, thereby makes the current that get into impeller have rotational speed, and the size of its rotational speed is directly proportional with flow; When flow was very little, its rotational speed was very little, reduced lift hardly; When flow is very big; Its rotational speed is very big, will reduce lift greatly, thereby reduce pump shaft power.So no matter present embodiment uses under high-lift low flow rate condition, still under the low lift and large flow rate operating mode, uses, its pump power is all similar, as long as by the supporting suitable motor of declared working condition, just can realize that total head does not have overlond running.
Claims (1)
1. full high-lift submersible electric pump; Be made up of jointly a low specific speed centrifugal pump and a submersible motor, the couplet frame between motor and the water pump is not only the connecting piece of motor and water pump, and is the import of water pump; It is characterized in that: the gusset that joins frame is not radioactive rays radially; But oblique straight line, and with the intersection point of gusset center line and impeller inlet circumference be preparatory point, the angle of the radially radioactive rays on gusset center line and summit is greater than 10 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205358503U CN202431539U (en) | 2011-11-28 | 2011-11-28 | Total-head submersible electric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205358503U CN202431539U (en) | 2011-11-28 | 2011-11-28 | Total-head submersible electric pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202431539U true CN202431539U (en) | 2012-09-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205358503U Expired - Fee Related CN202431539U (en) | 2011-11-28 | 2011-11-28 | Total-head submersible electric pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202431539U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562611A (en) * | 2011-11-28 | 2012-07-11 | 江苏大学 | Full-lift electric submersible pump |
-
2011
- 2011-11-28 CN CN2011205358503U patent/CN202431539U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562611A (en) * | 2011-11-28 | 2012-07-11 | 江苏大学 | Full-lift electric submersible 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 |
Granted publication date: 20120912 Termination date: 20191128 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |