CN109751246B - Full-through-flow pump - Google Patents
Full-through-flow pump Download PDFInfo
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- CN109751246B CN109751246B CN201910192122.8A CN201910192122A CN109751246B CN 109751246 B CN109751246 B CN 109751246B CN 201910192122 A CN201910192122 A CN 201910192122A CN 109751246 B CN109751246 B CN 109751246B
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Abstract
The utility model provides a novel stator-rotor structure's full tubular pump, belongs to hydraulic engineering equipment technical field, and the stator is split type structure, novel structure, through mutually supporting with seven guide vanes of three impellers that each other are prime number, can reduce the resonance of unit; the stator structure is convenient to install and detach, the stator is installed on the water inlet and outlet pipeline through positioning and fixing, the stepped structure groove is designed in the stator, so that the flow between the rotor and the stator is stable, the contact area between the rotor and the stator and the water body is increased, the larger the area is, the better the heat dissipation performance is, the stator is installed outside, the flow state of water flow cannot be influenced, the basis is provided for the design and installation of the motor pump, compared with the traditional stator-rotor structure of the full-through-flow pump, the gap flow meets the requirement under the condition of ensuring the enough power factor, the energy conversion rate is high, the energy is saved, the flow channel is smooth, the flow state of water flow is better, the effective heat dissipation can be realized while the flow is stable, and the stability of the whole operation of the device is improved.
Description
Technical Field
The invention belongs to the technical field of hydraulic engineering equipment, relates to a full-through-flow pump, and particularly relates to a full-through-flow pump.
Background
At present, the middle-high water head hydraulic resources in China are basically developed, so that the development of the low water head hydraulic resources and the ultra-low water head hydraulic resources is rapidly scheduled. The motor pump is a novel water pump and has the characteristics of large flow, low lift, small hydraulic loss, compact structure and the like. Therefore, at present, a plurality of low-lift pump stations at home and abroad are abandoned to use the vertical axial flow pump unit, and instead, a full-flow unit is used. However, since many technical problems are not effectively solved, the development of the motor pump in China is very slow. The installation and sealing of the stator shell are key problems to be solved, and the motor pump is characterized in that the rotor of the motor pump is directly fixed with the outer edge of the impeller of the water pump, a circle of stator is surrounded outside the rotor, a gap between the rotor and the stator is very small, the stator is difficult to install, the gap between the rotor and the stator is filled with water, and the dynamic friction between the rotor and the water is relatively large, so that the efficiency of the motor pump is relatively low. Sealing is also a problem for motor pumps because the rotor of the stator is very close to the flow passage of the motor pump and the flow rate of the water nearby is very high. In addition, the gap flow between the motor stator and the rotor is not easy to control, and the overall heat dissipation of the device is affected. Therefore, it is necessary to design a novel stator and rotor structure of the motor pump to provide guiding basis for the design of the motor pump.
Disclosure of Invention
The invention aims at solving the defects that the rotor of the existing motor pump is directly fixed with the outer edge of a water pump impeller, a circle of stator is surrounded outside the rotor, the gap between the rotor and the stator is very small, water is filled in the gap, the stator is difficult to install, the dynamic friction between the rotor and the water is relatively large, the heat dissipation performance of the whole device is poor, the efficiency of the motor pump is low, and the like, and provides a full-through-flow pump which can effectively dissipate heat while guaranteeing the stable flow and improve the stability of the whole operation of the pump device.
The technical scheme of the invention is as follows: the full-through-flow pump comprises a water inlet pipeline, a water outlet pipeline, a pump shaft and a hub which are arranged in the water inlet pipeline and the water outlet pipeline, a front water guide cone arranged at the front end of the hub, an impeller arranged on the hub, and a rear water guide cone and guide vanes which are arranged at the rear end of the hub; the method is characterized in that: the stator is formed by connecting a first stator ring, a second stator ring, a third stator ring and a fourth stator ring, the first stator ring, the second stator ring, the third stator ring and the fourth stator ring are connected through connecting lugs to form an integral annular structure, threaded holes are formed in two outer side surfaces of the stator, the stator is fixedly connected with a flange plate on the outer wall of the water inlet pipeline and the outer wall of the water outlet pipeline through bolts in the threaded holes, grooves are formed in the centers of the first stator ring, the second stator ring, the third stator ring and the fourth stator ring, left stepped grooves and right stepped grooves are formed in the two inner side walls of the grooves, the left stepped grooves and the right stepped grooves are in central symmetry, a rotor is fixedly arranged on the outer edge of the impeller, the two sides of the rotor are respectively provided with left stepped blocks and right stepped blocks, the left stepped blocks and the right stepped blocks are in central symmetry, the left stepped blocks and the right stepped blocks form rotary clearance fit, and the impeller and the pump shaft are driven to rotate.
The inlet pipeline and the outlet pipeline have the same structure, are straight pipelines with the diameter of 320mm, and have the hub ratio of 0.4.
The diameter of the impeller is 320mm, the axial length of the impeller is 0.5 times of the diameter of the impeller, and the number of blades on the impeller is 3.
The first stator ring, the second stator ring, the third stator ring and the fourth stator ring are of left-right split structures, the thickness of the stator is 0.1 time of the diameter of the impeller, the diameter of the stator is 1.1 time of the diameter of the impeller, and polytetrafluoroethylene O-shaped sealing rings are arranged at the joints of the stator rings for sealing.
The left step groove and the right step groove are formed by a section of annular deep groove and a section of annular shallow groove, and the annular deep groove and the annular shallow groove are coaxial.
The thickness of the rotor is 1.06 times of the diameter of the impeller, and the axial length of the rotor is 0.25 times of the length of the impeller.
The top gap between the stator and the rotor is not more than 2mm.
The beneficial effects of the invention are as follows: the full-through-flow pump provided by the invention has a novel structure, and can reduce the resonance of a unit by mutually matching three impellers and seven guide vanes which are prime numbers; the stator is designed into a split structure, the stator is conveniently installed and disassembled on a water inlet and outlet pipeline through positioning and fixing, a stepped structure groove is designed in the stator, so that the flow between the rotor and the stator is stable, the contact area between the rotor and the stator and a water body is increased, the larger the area is, the better the heat dissipation performance is, manpower and material resources can be saved, the sealing effect between the stator and between the stator and the pipeline can be improved, the installation of the stator is carried out outside, the flow state of water flow cannot be influenced, the basis is provided for the design and the installation of a motor pump, and compared with the traditional all-through-flow pump stator-rotor structure, the gap flow meets the requirement under the condition of ensuring that the power factor is large enough, the energy conversion rate is high, the energy source is saved, the flow state is smooth, the flow state is better, the effective heat dissipation can be realized while the flow stability is ensured, and the integral operation stability of the device is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic view of a stator structure according to the present invention.
FIG. 3 is a schematic cross-sectional view of the structure of FIG. 2 in the direction A-A.
Fig. 4 is a schematic view of the rotor structure of the impeller according to the present invention.
In the figure: the water guiding device comprises a front water guiding cone 1, a hub 2, a stator 3, a first stator ring 3-1, a second stator ring 3-2, a third stator ring 3-3, a fourth stator ring 3-4, a threaded hole 3-5, a left stepped groove 3-6, a right stepped groove 3-7, a rotor 4, a left stepped block 4-1, a right stepped block 4-2, a connecting lug 5, an impeller 6, a guide vane 7, a rear water guiding cone 8, an outlet pipeline 9, a water inlet pipeline 10, a pump shaft 11 and a stepped groove 12.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1 to 4, an all-through pump comprises a water inlet pipeline 10, a water outlet pipeline 9, a pump shaft 11 and a hub 2 which are arranged in the water inlet pipeline 10 and the water outlet pipeline 9, a front water guide cone 1 arranged at the front end of the hub 2, an impeller 6 arranged on the hub 2, and a rear water guide cone 8 and a guide vane 7 arranged at the rear end of the hub 2; the stator 3 is arranged on the outer wall of the joint of the water inlet pipeline 10 and the water outlet pipeline 9, the stator 3 is formed by connecting a first stator ring 3-1, a second stator ring 3-2, a third stator ring 3-3 and a fourth stator ring 3-4, the first stator ring 3-1, the second stator ring 3-2, the third stator ring 3-3 and the fourth stator ring 3-4 are connected through connecting lugs 5 to form an integral annular structure, threaded holes 3-5 are formed on the two outer side surfaces of the stator 3, the stator 3 is fixedly connected with flange plates on the outer walls of the water inlet pipeline 10 and the water outlet pipeline 9 through bolts in the threaded holes 3-5, grooves are formed in the centers of the first stator ring 3-1, the second stator ring 3-2, the third stator ring 3-3 and the fourth stator ring 3-4, left stepped grooves 3-6 and right stepped grooves 3-7 are formed on the two inner side walls of the grooves, the outer edges of the impellers are in central symmetry, the impellers 4 are fixedly arranged on the outer edges of the impellers, the rotors 4 are in annular structures, the two sides of the rotors 4 are respectively provided with stepped blocks 4-1-4, and 4-4 are in a rotary-1-4 stepped block and 4, and the left stepped block and the two stepped blocks are in a rotary block and 4-4 are in a gap with the left stepped block and a gap 4-1-4, and a rotary block 4, and a gap 4 is formed between the two stepped blocks and the two stepped blocks are in a rotary block and a rotary block.
As shown in fig. 1-4, the structure of the water inlet pipeline 10 and the water outlet pipeline 9 of the full-through-flow pump is the same, the water inlet pipeline 10 and the water outlet pipeline 9 are straight pipelines with the diameter of 320mm, and the hub ratio is 0.4; the diameter of the impeller 6 is 320mm, the axial length of the impeller 6 is 0.5 times of the diameter of the impeller 6, and the number of blades on the impeller 6 is 3; the first stator ring 3-1, the second stator ring 3-2, the third stator ring 3-3 and the fourth stator ring 3-4 are all of left-right split structures, the thickness of the stator 3 is 0.1 time of the diameter of the impeller, the diameter of the stator 3 is 1.1 time of the diameter of the impeller 6, and polytetrafluoroethylene O-shaped sealing rings are arranged at the joints of the stator rings for sealing; the left step groove 3-6 and the right step groove 3-7 are formed by a section of annular deep groove and a section of annular shallow groove, and the annular deep groove and the annular shallow groove are coaxial; the thickness of the rotor 4 is 1.06 times of the diameter of the impeller 6, and the axial length of the rotor 4 is 0.25 times of the length of the impeller 6; the top gap between the stator 3 and the rotor 4 is not more than 2mm.
Examples
In order to minimize the head loss of the motor pump, the vibration of the unit is minimized, the efficiency is optimized, three blades with the impeller diameter d0=320 mm are selected, a straight pipeline with the diameter d1=320 mm is selected as a water inlet and outlet pipeline, the hub ratio is 0.4, the pump shaft diameter d= 0.15D0, the axial length L= 0.5D0 of the impeller, a straight guide blade with the same diameter as the impeller is selected as the guide blade, the rotor thickness d2= 1.06D0, d2= 0.06D0 and the axial length L2=0.25L. The thickness d3= 0.1D0 of the stator, the diameter of the stator is d3= 1.1D0, and the axial length l3=0.3l. In order to eliminate the water flow circulation at the outlet of the impeller, seven straight guide vanes are selected, and the calculated number of the outlet circulation can be obviously eliminated, so that the flow state is improved, and the efficiency of the motor pump is improved. Meanwhile, the device can also operate with three impellers in a combined way, so that the resonance of the unit is reduced, and the operation stability of the unit is improved. In order to meet the requirements of flow and lift and improve the efficiency of a motor pump, the S-shaped impeller with the diameter of D0=320 mm is selected and used, the impeller, the rotor and the pump shaft are welded into a whole, the inner diameter of a water inlet and outlet pipeline and the inner diameter of the rotor are arranged on the same straight line, and smoothness of water flow state is guaranteed.
The larger the diameter of the rotor is, the thicker the thickness of the rotor is, the larger the rotational inertia of the unit is, and the larger the contact area between the rotor and the water body is, so that the friction loss between the rotor and the water body is increased, and the efficiency is reduced. However, too small a rotor diameter results in reduced efficiency of the motor, so that an optimum rotor thickness d2= 1.06D0, d2= 0.06D0, and an axial length l2=0.25l is selected. In order to meet the requirement of the gap flow of the unit and stabilize, heat dissipation is ensured, therefore, the gap between the stator and the rotor is arranged in a step shape, and in order to maximize the conversion efficiency of the motor, the gap d=2mm is designed. Because the stator wraps the periphery of the rotor for one circle, the stator is designed into four parts for convenient installation and detachment, and the stator is installed by flange parts. The thickness d3= 0.1D0 of the stator, the diameter of the stator is d3= 1.1D0, and the axial length l3=0.3l. Because the stators of the unit are connected by flanges, in order to ensure the overall tightness of the device, the flanges are sealed by polytetrafluoroethylene O-shaped sealing rings.
Claims (7)
1. The full-through-flow pump comprises a water inlet pipeline (10), a water outlet pipeline (9), a pump shaft (11) and a hub (2) which are arranged in the water inlet pipeline (10) and the water outlet pipeline (9), a front water guide cone (1) arranged at the front end of the hub (2), an impeller (6) arranged on the hub (2), and a rear water guide cone (8) and guide vanes (7) which are arranged at the rear end of the hub (2); the method is characterized in that: the stator (3) is formed by connecting a first stator ring (3-1), a second stator ring (3-2), a third stator ring (3-3) and a fourth stator ring (3-4), the first stator ring (3-1), the second stator ring (3-2), the third stator ring (3-3) and the fourth stator ring (3-4) are connected through connecting lugs (5) to form an integral annular structure, threaded holes (3-5) are formed in two outer side surfaces of the stator (3), the stator (3) is fixedly connected with flanges on the outer walls of the water inlet pipe (10) and the water outlet pipe (9) through bolts in the threaded holes (3-5), grooves are formed in the centers of the first stator ring (3-1), the second stator ring (3-2), the third stator ring (3-3) and the fourth stator ring (3-4), left stepped grooves (3-6) and right stepped grooves (6) are formed in the two inner side walls of the grooves, the rotor (3-4) are symmetrical, and the rotor (3-4) is provided with the left stepped grooves (6-7), the two sides of the rotor (4) are respectively provided with a left step block (4-1) and a right step block (4-2), the left step block (4-1) and the right step block (4-2) are centrosymmetric, the left step block (4-1) and the left step groove (3-6), the right step block (4-2) and the right step groove (3-7) form rotary clearance fit, and the stator (3) drives the rotor (4) to rotate so as to drive the impeller (6) and the pump shaft (11) to rotate.
2. A full flow pump according to claim 1, characterized in that: the inlet pipeline (10) and the outlet pipeline (9) have the same structure, are straight pipelines with the diameter of 320mm, and have the hub ratio of 0.4.
3. A full flow pump according to claim 1, characterized in that: the diameter of the impeller (6) is 320mm, the axial length of the impeller (6) is 0.5 times of the diameter of the impeller (6), and the number of blades on the impeller (6) is 3.
4. A full flow pump according to claim 1, characterized in that: the first stator ring (3-1), the second stator ring (3-2), the third stator ring (3-3) and the fourth stator ring (3-4) are of left-right split structures, the thickness of the stator (3) is 0.1 time of the diameter of the impeller, the diameter of the stator (3) is 1.1 time of the diameter of the impeller (6), and polytetrafluoroethylene O-shaped sealing rings are arranged at the joints of the stator rings for sealing.
5. A full flow pump according to claim 1, characterized in that: the left stepped groove (3-6) and the right stepped groove (3-7) are formed by a section of annular deep groove and a section of annular shallow groove, and the annular deep groove and the annular shallow groove are coaxial.
6. A full flow pump according to claim 1, characterized in that: the thickness of the rotor (4) is 1.06 times of the diameter of the impeller (6), and the axial length of the rotor (4) is 0.25 times of the length of the impeller (6).
7. A full flow pump according to claim 1, characterized in that: the top gap between the stator (3) and the rotor (4) is not more than 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192122.8A CN109751246B (en) | 2019-03-14 | 2019-03-14 | Full-through-flow pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192122.8A CN109751246B (en) | 2019-03-14 | 2019-03-14 | Full-through-flow pump |
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| Publication Number | Publication Date |
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| CN109751246A CN109751246A (en) | 2019-05-14 |
| CN109751246B true CN109751246B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910192122.8A Active CN109751246B (en) | 2019-03-14 | 2019-03-14 | Full-through-flow pump |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397602A (en) * | 2019-06-27 | 2019-11-01 | 中国船舶重工集团公司第七一九研究所 | A kind of integrated pipeline pump |
| CN115898956B (en) * | 2023-01-31 | 2023-07-14 | 扬州大学 | Bulb structure based on bionics optimization and method for optimizing flow state at bulb |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000287430A (en) * | 1999-03-29 | 2000-10-13 | Matsushita Electric Ind Co Ltd | Brushless motor, pump, and magnetizing method of magnet in brushless motor |
| JP2004132209A (en) * | 2002-10-09 | 2004-04-30 | Hitachi Industries Co Ltd | Axial-flow type fluid machine |
| CN206221295U (en) * | 2016-11-21 | 2017-06-06 | 扬州大学 | A kind of full-tubular two-way pump |
| CN107248789A (en) * | 2017-07-31 | 2017-10-13 | 广东威灵电机制造有限公司 | Stator module, motor, the assemble method of electronic water pump and stator |
| CN108825518A (en) * | 2018-07-26 | 2018-11-16 | 邓悌康 | High lift full-tubular submersible mixed-flow electric pump in one kind |
| CN209671219U (en) * | 2019-03-14 | 2019-11-22 | 扬州大学 | A kind of full-tubular pump of novel stator and rotor sructure |
-
2019
- 2019-03-14 CN CN201910192122.8A patent/CN109751246B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000287430A (en) * | 1999-03-29 | 2000-10-13 | Matsushita Electric Ind Co Ltd | Brushless motor, pump, and magnetizing method of magnet in brushless motor |
| JP2004132209A (en) * | 2002-10-09 | 2004-04-30 | Hitachi Industries Co Ltd | Axial-flow type fluid machine |
| CN206221295U (en) * | 2016-11-21 | 2017-06-06 | 扬州大学 | A kind of full-tubular two-way pump |
| CN107248789A (en) * | 2017-07-31 | 2017-10-13 | 广东威灵电机制造有限公司 | Stator module, motor, the assemble method of electronic water pump and stator |
| CN108825518A (en) * | 2018-07-26 | 2018-11-16 | 邓悌康 | High lift full-tubular submersible mixed-flow electric pump in one kind |
| CN209671219U (en) * | 2019-03-14 | 2019-11-22 | 扬州大学 | A kind of full-tubular pump of novel stator and rotor sructure |
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