CN204253379U - The built-in submersible axial flow pump of a kind of both stage impellers - Google Patents
The built-in submersible axial flow pump of a kind of both stage impellers Download PDFInfo
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- CN204253379U CN204253379U CN201420682236.3U CN201420682236U CN204253379U CN 204253379 U CN204253379 U CN 204253379U CN 201420682236 U CN201420682236 U CN 201420682236U CN 204253379 U CN204253379 U CN 204253379U
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Abstract
The utility model relates to the built-in submersible axial flow pump of a kind of both stage impellers.Be provided with the suction chamber of coaxial through connection successively, impeller mechanism and water-supplying chamber in the housing of pump, impeller mechanism is fixed in rotating shaft; The stator of motor is located in inner walls, and rotor is fixed on the excircle of impeller housing; Impeller mechanism is sencond stage impeller; The rotating shaft corresponding with suction chamber is fixed with first stage impeller; First stage impeller, rotor, sencond stage impeller form an overall rotor, substantially reduce submersible axial flow pump axial length, compact structure; Rotating shaft two strong point spacing is short on the other hand, reduces intensity and the rigidity requirement of countershaft; Under the acting in conjunction of first stage impeller and sencond stage impeller, submerged axial-flow lift of pump can reach more than 20 meters, has greatly widened the operation strategies of submersible axial flow pump; Motor in the utility model is placed in the outside of runner, does not affect the pumping current of Submerged Motor Pumps, improves the efficiency of Submerged Motor Pumps.
Description
Technical field
The utility model belongs to Submerged Motor Pumps technical field, is specifically related to submersible axial-flow pump with inbuilt impeller.
Background technique
Usually, the structure of submersible axial-flow pump with inbuilt impeller is comprise the suction chamber of coaxial through connection, an impeller hub and water-supplying chamber, and the axis middle part of three is provided with rotating shaft.The radial cylindrical of impeller hub is provided with 3-5 sheet blade, and composition one stage impeller, rotor is fixedly installed on the excircle of circular impeller housing, and form an entirety with impeller housing, impeller is positioned at the middle part of rotor.Rotor is positioned at motor stator, and rotor is the annulus that internal diameter is identical with impeller outer diameter.Motor stator is fixedly installed in stator casing 61, and the axial two ends of stator casing 61 are connected respectively the outer circumference portion of suction chamber and the outer circumference portion of water-supplying chamber.The deficiency of the submersible axial flow pump existence of this structural type: first, after rotor external diameter strengthens, by Principle of Electric Engine:
Wherein:
----constant of the machine
----stator punching external diameter
----unshakable in one's determination effective length
----motor speed
----motor electromagnetic power
For the motor of certain power and speed range,
it is a constant.Submersible axial-flow pump with inbuilt impeller will arrange an impeller because of its rotor inside, therefore the internal diameter of stator punching
increase comparatively large, correspondingly electric machine iron core effective length
can greatly reduce, the general axial length being all less than impeller, but in the design for ensureing the performance of impeller, axial length unshakable in one's determination can be lengthened, namely strengthen the axial length of complete machine, the specific power of motor can be made like this to reduce, performance can not accomplish optimum Electromagnetic Design, therefore cause unnecessary waste of raw materials simultaneously, considerably increase the water frictional loss of motor, directly affect the efficiency of submersible axial-flow pump with inbuilt impeller.In addition, the hydraulic characteristic of axial-flow pump is that flow is large, lift is low, lift≤10 meter of single-stage impeller, therefore its occasion be suitable for has significant limitation.Therefore former impeller built-in diving axle (mixing) stream pump efficiency is lower, and axial length is longer, and raw material metal consumption is large, and application occasion is narrow, has certain narrow limitation.
Model utility content
Low in order to solve submerged axial-flow pump efficiency, axial length can not make full use of, and utilization confinement problems, the utility model by architecture advances, provides a kind of lift to reach more than 20 meters, using scope is wide, utilization ratio the is high built-in submersible axial flow pump of both stage impellers.
The built-in submersible axial flow pump of a kind of both stage impellers comprises housing, and be provided with the suction chamber 10 of coaxial through connection successively, impeller mechanism and water-supplying chamber 1 in housing, be provided with motor in the housing corresponding with impeller mechanism, described impeller mechanism is fixed in rotating shaft 3; The stator of described motor is fixed in inner walls, and rotor is fixed on the excircle of circular impeller housing;
The sencond stage impeller that described impeller mechanism is made up of two more than secondary wheel hub 41 and three grade blades 42;
The rotating shaft 3 corresponding with suction chamber 10 is fixed with first stage impeller 9, and described first stage impeller 9 is made up of first-level blades 92 more than chopped-off head wheel hub 91 and three; First stage impeller 9, rotor, sencond stage impeller form an overall rotor;
Cavity between described first stage impeller 9 and sencond stage impeller is chopped-off head diversion cavity 8;
Rotating shaft 3 in chopped-off head diversion cavity 8 is provided with thrust-bearing 7, and the end of the rotating shaft 3 of water-supplying chamber 1 side is provided with radial bearing 2; Rotating shaft 3 end at radial bearing 2 place and the rotating shaft 3 at thrust-bearing 7 place are respectively equipped with mechanism seals mechanism;
Under the acting in conjunction of first stage impeller 9 and sencond stage impeller, described submerged axial-flow lift of pump can reach more than 20 meters.
Advantageous Effects of the present utility model embodies in the following areas:
1. the rotor of first stage impeller, motor, sencond stage impeller are formed an overall rotor by the utility model.Substantially reduce submersible axial flow pump axial length, compact structure; Rotating shaft two strong point spacing is short on the other hand, reduces intensity and the rigidity requirement of countershaft.Submersible motor is placed in the outside of runner, does not affect the pumping current of Submerged Motor Pumps, improves the efficiency of Submerged Motor Pumps;
2. the utility model design sencond stage impeller, makes the lift of Submerged Motor Pumps can improve nearly one times on the original basis, reaches more than 20 meters, greatly widened the operation strategies of submersible axial flow pump;
3. the rotating shaft two ends of impeller arrange radial bearing and thrust-bearing respectively, form 2 stable supporting structures, ensure impeller working stability safety;
4. the utility model design of electrical motor is more reasonable, and the power of motor density of unit materials improves, and saves metal wastage;
5. staor winding line adopts high strength radiation crosslinking polyethylene water proof winding wires, is suitable for being immersed in water for a long time, improves the safety reliability of motor.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Sequence number in upper figure: water-supplying chamber 1, radial bearing 2, rotating shaft 3, sencond stage impeller 4, secondary wheel hub 41, two grade blade 42, rotor 5, stator 6, thrust-bearing 7, chopped-off head diversion cavity 8, first stage impeller 9, chopped-off head wheel hub 91, first-level blade 92, suction chamber 10, integrated mechanical sealing 11.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is further described.
See Fig. 1, the built-in submersible axial flow pump of a kind of both stage impellers comprises housing, the suction chamber 10 of coaxial through connection successively, sencond stage impeller 4, first stage impeller 9 and water-supplying chamber 1 is provided with in housing, be provided with motor in the housing corresponding with sencond stage impeller 4, sencond stage impeller 4 and first stage impeller 9 are all fixed in rotating shaft 3.The stator 6 of motor is fixedly mounted in inner walls, and the winding coil of stator 6 is water proof winding wires circle, and the material of water proof winding wires circle is high strength radiation crosslinking polyethylene, and rotor 5 is fixedly installed on the excircle of circular sencond stage impeller 4 shell.
See Fig. 2, sencond stage impeller 4 is made up of secondary wheel hub 41 and three two grade blades 42; See Fig. 3, first stage impeller 9 is made up of chopped-off head wheel hub 91 and three first-level blades 92, and the gap between the excircle of first-level blade 92 and the inwall of suction chamber 10 is 1 ~ 1.5mm.First stage impeller 9, rotor 5, sencond stage impeller 4 form an overall rotor.
Cavity between first stage impeller 9 and sencond stage impeller 4 is chopped-off head diversion cavity 8; Be provided with labyrinth-like filtering mechanism between chopped-off head diversion cavity 8 and rotating shaft 3, prevent impurities in water from entering the winding coil of stator 6, destroy the electrical insulation properties of motor, also play the impact preventing pumping current to stator 6 winding coil.Rotating shaft 3 in chopped-off head diversion cavity 8 is installed on housing by thrust-bearing 7, and the end of the rotating shaft 3 of water-supplying chamber 1 side is installed on housing by radial bearing 2; Rotating shaft 3 end at radial bearing 2 place and the rotating shaft 3 at thrust-bearing 7 place are separately installed with mechanism seals mechanism; The mechanical sealing mechanism at this two place is integrated mechanical sealing, reduce the installation precision requirement of rotating shaft 3, and floatability is good.The filtering mechanism that the water inlet of suction chamber 10 is provided with, carries out filtration treatment to the impurity in water inlet.Prevent impurities in water from entering mechanical sealing mechanism and destroy sealability.
During work, motor internal is full of water, and drive rotor 5 to rotate by electromagnetic induction, first stage impeller 9, rotor 5, sencond stage impeller 4 form an overall rotor.Working flow is introduced into suction chamber 10, increases pressure energy by first stage impeller 9, then after the rectification of first-level guide blade body 8, enters sencond stage impeller 4 and pressurize, and make the pressure energy of conveying liquid increase twice, lift can reach more than 20 meters.Motor cavity is connected with ambient water by filtration, is suitable for being immersed in water for a long time.And having water as cooling medium, motor radiating condition is good, and motor is safe and reliable to operation.
Claims (6)
1. the built-in submersible axial flow pump of both stage impellers, comprise housing, be provided with the suction chamber (10) of coaxial through connection successively, impeller mechanism and water-supplying chamber (1) in housing, be provided with motor in the housing corresponding with impeller mechanism, described impeller mechanism is fixed in rotating shaft (3); The stator (6) of described motor is fixed in inner walls, rotor (5) is fixed on the excircle of circular impeller housing, it is characterized in that: the sencond stage impeller that described impeller mechanism is made up of two grade blades (42) of secondary wheel hub (41) and more than three; The rotating shaft (3) corresponding with suction chamber (10) is fixed with first stage impeller (9), and described first stage impeller (9) is made up of the first-level blade (92) of chopped-off head wheel hub (91) and more than three; First stage impeller (9), rotor, sencond stage impeller form an overall rotor; Cavity between described first stage impeller (9) and sencond stage impeller is chopped-off head diversion cavity (8); Rotating shaft (3) in chopped-off head diversion cavity (8) is located on housing by thrust-bearing (7), and the end of the rotating shaft (3) of water-supplying chamber (1) side is located on housing by radial bearing (2); Rotating shaft (3) end at radial bearing (2) place and the rotating shaft (3) at thrust-bearing (7) place are respectively equipped with mechanical sealing mechanism; Under the acting in conjunction of first stage impeller (9) and sencond stage impeller (4), described submerged axial-flow lift of pump reaches more than 20 meters.
2. the built-in submersible axial flow pump of a kind of both stage impellers according to claim 1, is characterized in that: described first stage impeller (9) is made up of chopped-off head wheel hub (91) and three first-level blades (92); Gap between the excircle of first-level blade (92) and the inwall of suction chamber (10) is 1 ~ 1.5mm.
3. the built-in submersible axial flow pump of a kind of both stage impellers according to claim 1, it is characterized in that: between described chopped-off head diversion cavity (8) and rotating shaft (3), labyrinth-like filtering mechanism is set, prevent impurities in water from entering the winding coil of stator (6), destroy the electrical insulation properties of motor, also play the impact preventing pumping current to stator (6) winding coil.
4. the built-in submersible axial flow pump of a kind of both stage impellers according to claim 1, is characterized in that: the filtering mechanism that the water inlet of described suction chamber (10) is provided with, and carries out filtration treatment to the impurity in water inlet; Prevent impurities in water from entering integrated mechanical sealing (11), destroy sealability.
5. the built-in submersible axial flow pump of a kind of both stage impellers according to claim 1, is characterized in that: the winding coil of stator (6) is water proof winding wires circle, and the material of water proof winding wires circle is high strength radiation crosslinking polyethylene.
6. the built-in submersible axial flow pump of a kind of both stage impellers according to claim 1, it is characterized in that: described mechanical sealing mechanism is integrated mechanical sealing, reduce installation precision requirement, and floatability is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420682236.3U CN204253379U (en) | 2014-11-15 | 2014-11-15 | The built-in submersible axial flow pump of a kind of both stage impellers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420682236.3U CN204253379U (en) | 2014-11-15 | 2014-11-15 | The built-in submersible axial flow pump of a kind of both stage impellers |
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| CN204253379U true CN204253379U (en) | 2015-04-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389796A (en) * | 2014-11-15 | 2015-03-04 | 合肥恒大江海泵业股份有限公司 | Two-stage impeller embedded submersible axial-flow pump |
| CN110332125A (en) * | 2019-07-30 | 2019-10-15 | 中国船舶重工集团公司第七一九研究所 | A kind of compact profile shaft flow tube road pump |
| CN110953160A (en) * | 2019-11-28 | 2020-04-03 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
-
2014
- 2014-11-15 CN CN201420682236.3U patent/CN204253379U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389796A (en) * | 2014-11-15 | 2015-03-04 | 合肥恒大江海泵业股份有限公司 | Two-stage impeller embedded submersible axial-flow pump |
| CN104389796B (en) * | 2014-11-15 | 2017-02-22 | 合肥恒大江海泵业股份有限公司 | Two-stage impeller embedded submersible axial-flow pump |
| CN110332125A (en) * | 2019-07-30 | 2019-10-15 | 中国船舶重工集团公司第七一九研究所 | A kind of compact profile shaft flow tube road pump |
| CN110332125B (en) * | 2019-07-30 | 2024-04-26 | 中国船舶重工集团公司第七一九研究所 | Compact axial flow pipeline pump |
| CN110953160A (en) * | 2019-11-28 | 2020-04-03 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
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