CN109058128B - Performance test device for micro-lift rotary scraping blade pump - Google Patents
Performance test device for micro-lift rotary scraping blade pump Download PDFInfo
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- CN109058128B CN109058128B CN201811263226.5A CN201811263226A CN109058128B CN 109058128 B CN109058128 B CN 109058128B CN 201811263226 A CN201811263226 A CN 201811263226A CN 109058128 B CN109058128 B CN 109058128B
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- 238000007790 scraping Methods 0.000 title claims abstract description 16
- 238000011056 performance test Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 271
- 238000012360 testing method Methods 0.000 claims abstract description 16
- 230000001502 supplementing effect Effects 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 238000004364 calculation method Methods 0.000 abstract description 2
- 230000003020 moisturizing effect Effects 0.000 abstract 2
- 238000011161 development Methods 0.000 description 4
- 238000003809 water extraction Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a novel micro-lift rotary scraping blade pump performance test device, belong to hydraulic machinery equipment technical field, structurally by the moisturizing valve, the moisturizing pipe, the overflow chamber of intaking, the overflow board of intaking, the intake channel, wheel hub, the blade, the rim, the play basin, play water overflow board, play water overflow chamber, play water collecting pipe and electromagnetic flowmeter connect and constitute, can effectively test the performance of micro-lift rotary scraping blade pump that is arranged in low-lift operating mode, and verify the accuracy of design theory and calculation method, finally obtain the new pump type of safe, stable, high-efficient operation under 0-2 m lift, low, the unit is unstable of low-lift axial flow pump operating efficiency in traditional low-lift operating mode has been solved, the energy waste, the big scheduling defect of runner hydraulic loss, it has important meaning to improve the pump performance when the operating of extremely low-lift operating mode.
Description
Technical Field
The invention belongs to the technical field of hydraulic mechanical equipment, relates to a pump performance test device, and particularly relates to a micro-lift rotary scraping blade pump performance test device.
Background
In our country, the water lifting machinery is ancient, and our ancestors created tools for water lifting as early as the first of the principals, wherein the most widely used and longest-history water vehicles are the same. People in the east Han year begin to use water vehicles to lift water, and the past has been thousands of eight hundred years. The waterwheel is driven by wind power, water power, power storage or manpower, and in the 60 th century, a great number of windmills are operated in river network areas in China. Windmills are wind-powered water vehicles, but also cattle-powered water vehicles, hydraulically-powered water vehicles, manually-powered water vehicles, and the like, which have historically contributed to the development of agricultural irrigation. With the development of industrial technology, waterwheel is gradually replaced by water pump.
The water pump is a machine for converting and transmitting energy. The power machine drives the water pump to operate, and the mechanical energy of the power machine is converted into kinetic energy and potential energy of water through the water pump, namely, the energy of the power machine is transmitted to the water, so that the purposes of lifting the water and increasing the water pressure are achieved. Thus, the water pump is also a water lifting machine. Since the innovation of China is open, the manufacturing and production of the water pump are rapidly developed. The water pump is widely applied to agricultural irrigation and drainage and serves for agricultural production, disaster reduction and prevention; the method is also widely used for industrial enterprises and town construction, and serves for industrial production, town construction, flood control and disaster reduction and water environment engineering. On one hand, the water pump and the water pump station make important contributions to guaranteeing the life and property safety of people and the stable development of national economy, and on the other hand, along with the development of economic technology and the improvement of the living standard of people, new and higher requirements are also provided for the water pump and the water pump station.
In recent years, with the increasing demands of urban drainage tasks and the general concern of the masses about water environment problems, the demands of extremely low-lift pump stations are becoming higher and higher. Such as: the new Meng He-Ji brand water conservancy junction pump station is designed in Zhenjiang city of Jiangsu province, and the lowest net lift of the drainage working condition is 0 m; the lowest lift of the operation condition of the old and new two pump stations in the hidden river city of Hubei province is 0.36 and m. Existing pump types are difficult to meet if only for these two operating conditions. In order to meet the application of actual engineering, two general modes are adopted at the present stage: firstly, an axial flow pump with lower lift (the design lift of the pump is 2-3 meters) is selected, and the blades are adjusted to a smaller setting angle; secondly, an axial flow pump with lower lift is also selected, the diameter of the impeller is increased, and the rotation speed of the pump is reduced. Both of these approaches, while marginal, can create a series of problems: the flow rate in unit time is reduced by adopting the first mode, the pump operation time has to be increased to meet the flow rate requirement, and the pump operation working condition at the moment is seriously deviated from the design working condition, so that the efficiency is low, the unit is unstable, and serious energy waste is caused; the second method needs to increase the diameter of the impeller and the size of the water inlet and outlet tanks, thus causing the rapid increase of civil engineering investment, the hydraulic loss of the tanks occupies large proportion and the operation efficiency is low, and in addition, expensive frequency conversion equipment is required to be installed for regulating the rotation speed. Both methods obviously do not meet the safe, stable and efficient operation requirements of a pump station, cause great energy waste and cannot meet the requirements of energy conservation and emission reduction. In addition, the traditional pump station has high rotating speed and low pressure in the pump, so that the fish is greatly damaged. Therefore, more and more domestic scholars begin to expand the research range of pump lift, design a new pump with the lift range of 0-2 meters, reduce the damage of pump stations to ecological environment, improve the performance of the pump device under extremely low running lift, but lack a device for testing the performance of the micro-lift pump at present, which is not beneficial to the research and development of the micro-lift pump.
Disclosure of Invention
Aiming at the defects of low operation efficiency, unstable unit, energy waste, great hydraulic loss ratio of a groove and the like of an axial flow pump with lower head selected in the current low-head working condition, the invention needs to develop a micro-head rotary scraping blade pump, but the current device for testing the performance of the micro-head rotary scraping blade pump is still lacking, and the invention provides a micro-head rotary scraping blade pump performance testing device which can solve the defects of the prior art, has important significance for researching and developing a novel micro-head rotary scraping blade pump and improving the pump performance in the operation of the extremely low-head working condition.
The technical scheme of the invention is as follows: a performance test device of a micro-lift rotary scraping blade pump comprises a frame; the method is characterized in that: the motor is arranged on the rack, a torque meter is connected to an output shaft of the motor, the torque meter is connected with a shaft in a rolling bearing through a shaft coupling, an impeller consisting of a hub, blades and a rim is arranged at the shaft end of the shaft, a water inlet groove is connected to the left side of the impeller, a water inlet overflow chamber is arranged at the left end of the water inlet groove, a water inlet overflow plate is arranged at the joint of the water inlet groove and the water inlet groove, a water supplementing pipe is arranged above the water inlet groove, a water supplementing valve is arranged on the water supplementing pipe, a water outlet groove is connected to the right side of the impeller, a water outlet overflow chamber is arranged at the right end of the water outlet groove, a water outlet overflow plate is arranged at the joint of the water outlet overflow chamber and the water outlet groove, a water outlet collecting pipe is connected to the lower part of the water outlet overflow chamber, and an electromagnetic flowmeter is arranged on the water outlet.
The impeller is of a roller structure, the impeller is composed of a hub, blades and a rim, the impeller rotates anticlockwise to be positive, water and air can be in direct contact, free liquid level exists, negative pressure cannot be generated during operation, and cavitation cannot occur.
The blades are in an inclined straight panel form, are in a concave form at the water inlet side, and are easy to automatically flow into water; when the impeller rotates to the water outlet side, the impeller becomes convex, water is easy to be discharged and backflow of water can be prevented.
The water inlet tank and the water outlet tank are both horizontally arranged, and the water inlet tank is lower than the water outlet tank.
The water inlet overflow plate and the water outlet overflow plate are the same in height so as to ensure that the flow rates of water flowing into and out of the water tank are equal, and thus the interference influence of the flow rates on the testing device is ignored.
The hub, the water inlet overflow plate and the water outlet overflow plate determine the height of the water level difference of the water inlet tank and the water outlet tank, namely the lift H; the bigger the hub is, the greater the water level difference between the water inlet tank and the water outlet tank is, the gate slot is arranged at the overflow plate, the overflow plate is arranged in the gate slot, the height of the overflow plate is variable, and the pump lift is adjusted by adjusting the height of the overflow plate.
The impeller is sunk in the centers of the water inlet tank and the water outlet tank, so that the contact area between the impeller and water flow is increased, the water lifting amount is larger, the efficiency is higher, and the width of the water inlet tank and the width of the water outlet tank are about 1mm longer than the axial width of the impeller.
The shaft coupling is made of elastic materials, and the motor is connected with the torque meter and the torque meter is connected with the impeller through the shaft coupling made of the elastic materials.
The water quantity provided by the water supplementing pipe is larger than the water lifting quantity when the impeller operates, and redundant water passes through the overflow plate overflow test system so as to simulate the stable water inlet level when the actual pump station operates.
The lengths of the water inlet tank and the water outlet tank are both larger than the diameter of the impeller by five times so as to stabilize water flow, and the water flow of the water inlet tank and the water flow of the water outlet tank are in the same direction, so that hydraulic loss caused by water flow steering is avoided.
The beneficial effects of the invention are as follows: the invention provides a performance test device for a micro-lift rotary scraping blade pump, which structurally comprises a water supplementing valve, a water supplementing pipe, a water inlet overflow chamber, a water inlet overflow plate, a water inlet groove, a hub, blades, a rim, a water outlet groove, a water outlet overflow plate, a water outlet overflow chamber, a water outlet collecting pipe and an electromagnetic flowmeter which are connected, can effectively test the performance of the micro-lift rotary scraping blade pump in a low-lift working condition, verify the accuracy of a design theory and a calculation method, finally obtain a new pump type which safely, stably and efficiently operates under the 0-2 m lift, solve the defects of low operation efficiency, unstable unit, energy waste, large hydraulic loss of a runner and the like of the traditional low-lift axial flow pump in the low-lift working condition, and has important significance for improving the pump performance in the operation under the extremely low-lift working condition.
Drawings
Fig. 1 is a schematic view of the overall structure of the device of the present invention.
Fig. 2 is a schematic structural view of a impeller driving device in the present invention.
In the figure: the water replenishing valve 1, the water replenishing pipe 2, the water inlet overflow chamber 3, the water inlet overflow plate 4, the water inlet tank 5, the hub 6, the blades 7, the rim 8, the water outlet tank 9, the water outlet overflow plate 10, the water outlet overflow chamber 11, the water outlet collecting pipe 12, the electromagnetic flowmeter 13, the impeller 14, the sealing ring 15, the rolling bearing 16, the coupler 17, the torque meter 18 and the motor 19.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in figures 1-2, a micro-lift rotary scraping blade pump performance test device is provided with a motor 19 on a rack, a torque meter 18 is connected to an output shaft of the motor 19, the torque meter 18 is connected with a shaft in a rolling bearing 16 through a coupling 17, an impeller 14 composed of a hub 6, blades 7 and a rim 8 is arranged at the shaft end of the shaft, a water inlet tank 5 is connected to the left side of the impeller 14, a water inlet overflow chamber 3 is arranged at the left end of the water inlet tank 5, a water inlet overflow plate 4 is arranged at the joint of the water inlet overflow chamber 3 and the water inlet tank 5, a water supplementing pipe 2 is arranged above the water inlet tank 5, a water supplementing valve 1 is arranged on the water supplementing pipe 2, a water outlet tank 9 is connected to the right side of the impeller 14, a water outlet overflow chamber 11 is arranged at the right end of the water outlet tank 9, a water outlet overflow plate 10 is arranged at the joint of the water outlet overflow chamber 11 and the water outlet tank 9, a water outlet collecting pipe 12 is connected to the lower part of the water outlet overflow chamber 11, and an electromagnetic flowmeter 13 is arranged on the water outlet collecting pipe 12.
As shown in figures 1-2, in the micro-lift rotary scraper pump performance test device, an impeller 14 is of a roller structure, the impeller 14 consists of a hub 6, blades 7 and a rim 8, the impeller 14 rotates anticlockwise to be forward, water and air can be in direct contact, a free liquid level exists, negative pressure is not generated during operation, and cavitation is not generated; the blades 7 are in an inclined straight-panel shape, are in a concave shape at the water inlet side, and are easy to automatically flow into water; when the impeller rotates to the water outlet side, the impeller is changed into a convex shape, water is easy to flow out, and the water can be prevented from flowing backwards; the water inlet tank 5 and the water outlet tank 9 are horizontally arranged, and the water inlet tank 5 is lower than the water outlet tank 9; the water inlet overflow plate 4 and the water outlet overflow plate 10 have the same height so as to ensure that the flow rate of water flowing into and out of the water tank is equal, thereby neglecting the interference influence of the flow rate on the testing device; the hub 6, the water inlet overflow plate 4 and the water outlet overflow plate 10 determine the height of the water level difference of the water inlet tank 5 and the water outlet tank 9, namely the lift H; the larger the hub 6 is, the larger the water level difference between the water inlet tank 5 and the water outlet tank 9 is, the gate slot is arranged at the overflow plate position, the overflow plate is arranged in the gate slot, the height of the overflow plate is variable, and the pump lift is adjusted by adjusting the height of the overflow plate; the impeller 6 is sunk in the centers of the water inlet tank 5 and the water outlet tank 9, so that the contact area between the impeller 6 and water flow is increased, the water lifting capacity is larger, the efficiency is higher, and the widths of the water inlet tank 5 and the water outlet tank 9 are about 1mm longer than the axial width of the impeller 6; the shaft coupling 17 is made of elastic materials, and the motor 19 is connected with the torque meter 18 and the torque meter 18 is connected with the impeller 6 through the shaft coupling made of the elastic materials; the water quantity provided by the water supplementing pipe 2 is larger than the water lifting quantity when the impeller operates, and redundant water passes through the overflow plate overflow test system so as to simulate the stable water inlet level when the actual pump station operates; the lengths of the water inlet tank 5 and the water outlet tank 9 are larger than the diameter of the impeller 6 to stabilize water flow, and the water flow of the water inlet tank 5 and the water outlet tank 9 is in the same direction, so that hydraulic loss caused by water flow steering is avoided.
As shown in fig. 1-2, the installation requirements of a micro-lift rotary wiper pump performance test device are as follows:
(1) The size of the impeller is determined according to the water demand and the lift, a proper hub ratio is selected, and the diameter of the rim is about 0.5mm larger than the diameter of the outer edge of the blade so as to reduce friction resistance and ensure that leakage loss is in a reasonable range;
(2) Welding the blades on the hub;
(3) The impeller is sunk into the groove, so that the sunk depth is reasonable, excessive excavation can be avoided, and enough submerged depth can be ensured;
(4) Sealing is carried out at the position of the impeller shaft;
(5) Converting the size parameter of the impeller by referring to the Froude criterion;
(6) According to the design requirement, the rotating speed and the number of blades of the impeller are adjusted, and in the scheme, 8 blades are taken as an example;
(7) The water inlet pipe of the test system provides a flow larger than the water extraction amount of the impeller so as to meet the stable state of the water inlet tank, and the inlet overflow plate keeps an overflow state;
(8) The heights of the inlet overflow plate and the outlet overflow plate of the test system are kept consistent so as to eliminate the influence of the water flow kinetic energy on the test;
(9) The impeller, the torque meter and the motor are elastically connected through the coupler;
(10) The diameter of the water pipe is made, so that the overflow can completely flow out and air cannot be mixed in, and the electromagnetic flowmeter can accurately measure;
(11) The axial width of the impeller is determined according to specific flow requirements, the width of the groove is about 1mm longer than the axial width of the impeller, and the impeller is arranged in the center of the groove.
As shown in fig. 1-2, the working principle of the micro-lift rotary wiper pump performance test device is as follows: the impeller is a core component of the invention, and mainly consists of a hub, blades and a rim. The impeller is in the form of a roller and rotates anticlockwise to be positive. Unlike traditional pump, the novel micro-lift rotary scraping blade pump has only partial rim, so that water and air can be in direct contact, free liquid level exists, negative pressure is not generated during operation, and cavitation is not generated. The water inlet side of the rim is lower than the water outlet side, and the water inlet tank and the water outlet tank are horizontally arranged. The overflow plates with the same height are arranged at the water inlet and outlet tanks so as to ensure that the flow rates of water flowing into and out of the water tanks are equal, thereby neglecting the interference influence of the flow rates on the testing device. The external dimension of the impeller and the hub ratio of the impeller determine the water extraction quantity, namely the flow, of the novel micro-lift rotary scraping blade pump, and when the external dimension is the same, the smaller the hub ratio is, the larger the water extraction quantity of the pump is. The hub and the overflow plate determine the height of the water level difference of the water inlet tank and the water outlet tank, namely, the larger the hub is, the larger the water level difference of the water inlet tank and the water outlet tank is, and the height of the overflow plate on the water inlet tank and the water outlet tank is adjusted in a matched mode, so that the lift of the pump can be adjusted. When the impeller rotates, the position of the hub is unchanged, so that the backflow of water can be prevented. When the impeller rotates, water between the two blades is pushed to the water outlet groove, so that water at the water outlet side overflows into the water outlet overflow chamber; the water level at the water inlet side is lowered, and the water level at the water inlet side is complemented to the same height as the water inlet overflow plate due to the action of gravity. The blade may take a variety of forms. Take the inclined form as an example. The blades are placed in an inclined straight panel mode, and the blades are in a concave mode on the water inlet side, so that water can flow automatically easily; when the impeller rotates to the water outlet side, the impeller becomes convex, water is easy to be discharged and backflow of water can be prevented. The impeller is sunk into the groove, so that the contact area between the impeller and water flow can be increased, the water lifting amount is larger, and the efficiency is higher. The impeller is provided with continuous and stable power by a motor, and a torque meter is arranged between the motor and the impeller to measure the input power P of the motor to the impeller. The motor and the torque meter are connected with the impeller through the coupling made of elastic materials. The water supplementing pipe of the testing device can provide continuous water flow, the water quantity is larger than the water lifting quantity when the impeller operates, and redundant water overflows the testing system through the overflow plate, so that the stable water inlet level of the actual pump station during operation is simulated. The overflow plate is arranged in the gate slot, the height of the overflow plate is variable, and the overflow plate is arranged in the gate slot so as to adjust the water level. The water in the water outlet tank overflows through the overflow plate and then enters the water outlet overflow chamber and enters the water outlet collecting pipe, an electromagnetic flowmeter is arranged in the water outlet pipe to measure the water outlet flow, and the measured flow is the actual water extraction quantity Q of the waterwheel pump. The lengths of the water inlet tank and the water outlet tank are larger than five times of the diameter of the impeller so as to stabilize water flow, and the water flow of the water inlet tank and the water flow of the water outlet tank are in the same direction, so that hydraulic loss caused by water flow steering is avoided. Because the impeller is in drum-type rotation, water automatically flows into the impeller due to gravity, and only a small part of the rim is arranged, so that damage to fish can be avoided.
Claims (4)
1. A performance test device of a micro-lift rotary scraping blade pump comprises a frame; the method is characterized in that: the electromagnetic water inlet and outlet device is characterized in that a motor (19) is arranged on the rack, a torque meter (18) is connected to an output shaft of the motor (19), the torque meter (18) is connected with a shaft in a rolling bearing (16) through a coupler (17), an impeller (14) formed by a hub (6), blades (7) and a rim (8) is arranged at the shaft end of the shaft, a water inlet tank (5) is connected to the left side of the impeller (14), a water inlet overflow chamber (3) is arranged at the left end of the water inlet tank (5), a water inlet overflow plate (4) is arranged at the joint of the water inlet overflow chamber (3) and the water inlet tank (5), a water supplementing pipe (2) is arranged above the water inlet tank (5), a water supplementing valve (1) is arranged on the water supplementing pipe (2), a water outlet tank (9) is connected to the right side of the impeller (14), a water outlet overflow chamber (11) is arranged at the right end of the water outlet tank (9), a water outlet overflow plate (10) is arranged at the joint of the water outlet overflow chamber (11) and the water outlet tank (9), and an electromagnetic water outlet flow meter (12) is arranged below the water outlet pipe (12);
the blades (7) are in the form of inclined straight panels;
the water inlet tank (5) and the water outlet tank (9) are horizontally arranged, and the water inlet tank (5) is lower than the water outlet tank (9);
the height of the water inlet overflow plate (4) is the same as that of the water outlet overflow plate (10) so as to ensure that the flow rates of water flow in the water inlet channel and the water outlet channel are equal, and thus the interference influence of the flow rate on the testing device is ignored;
the water quantity provided by the water supplementing pipe (2) is larger than the water lifting quantity when the impeller operates;
the heights of the water inlet overflow plate (4) and the water outlet overflow plate (10) are variable.
2. The micro-lift rotary wiper pump performance test device according to claim 1, wherein: the impeller (14) is of a roller structure, the impeller (14) consists of a hub (6), blades (7) and a rim (8), and the impeller (14) rotates anticlockwise to be in a positive direction.
3. The micro-lift rotary wiper pump performance test device according to claim 1, wherein: the shaft coupling (17) is made of elastic materials, and the motor (19) and the torque meter (18) and the impeller (14) are connected through the shaft coupling made of the elastic materials.
4. The micro-lift rotary wiper pump performance test device according to claim 1, wherein: the lengths of the water inlet tank (5) and the water outlet tank (9) are larger than the diameter of the impeller (14) to stabilize water flow, and the water flow of the water inlet tank (5) and the water outlet tank (9) is in the same direction, so that hydraulic loss caused by water flow steering is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811263226.5A CN109058128B (en) | 2018-10-28 | 2018-10-28 | Performance test device for micro-lift rotary scraping blade pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811263226.5A CN109058128B (en) | 2018-10-28 | 2018-10-28 | Performance test device for micro-lift rotary scraping blade pump |
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| CN109058128A CN109058128A (en) | 2018-12-21 |
| CN109058128B true CN109058128B (en) | 2023-12-22 |
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| CN201811263226.5A Active CN109058128B (en) | 2018-10-28 | 2018-10-28 | Performance test device for micro-lift rotary scraping blade pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109707636B (en) * | 2019-03-14 | 2023-10-24 | 扬州大学 | Novel inlet distortion flow field axial flow pump experiment device |
| CN111828342B (en) * | 2020-07-20 | 2022-01-18 | 扬州大学 | Two-way pipeline submersible pump device easy to disassemble and assemble |
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| Title |
|---|
| 低扬程贯流泵装置模型试验研究;汤方平;水泵技术;第28-31页 * |
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| CN109058128A (en) | 2018-12-21 |
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