CN109707636B - Novel inlet distortion flow field axial flow pump experiment device - Google Patents
Novel inlet distortion flow field axial flow pump experiment device Download PDFInfo
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- CN109707636B CN109707636B CN201910192005.1A CN201910192005A CN109707636B CN 109707636 B CN109707636 B CN 109707636B CN 201910192005 A CN201910192005 A CN 201910192005A CN 109707636 B CN109707636 B CN 109707636B
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Abstract
The invention relates to a novel experimental device for an axial flow pump of an inlet distortion flow field, which belongs to the technical field of fluid mechanical equipment and comprises a water inlet pipe, a bent pipe, a water outlet pipe, an impeller, a motor shaft and a pressure stabilizing system, wherein the structure is novel; providing a basis for the actual running condition of the axial flow pump.
Description
Technical Field
The invention belongs to the technical field of fluid mechanical equipment, relates to an axial flow pump experimental device, and particularly relates to a novel inlet distortion flow field axial flow pump experimental device.
Background
The axial flow pump is a core part of a large-flow low-lift pump station, the performance of the axial flow pump directly determines the safe and efficient operation of the pump station, and the axial flow pump is widely applied to urban flood control and drainage, water jet propulsion, agricultural drainage and irrigation, industry, water treatment, water environment, heart blood pump and nuclear power circulation pipeline systems, and plays an increasingly important role along with the development of national economy.
The existing vane pump is designed on the premise of uniform axial inflow based on the vane cascade theory, but the existing vane pump is not in line with engineering practice. In a real working condition, the incoming flow condition of the pump is generally uneven due to factors such as space requirement, structural requirement setting and the like, and the main reason for the generation of inflow distortion of the pump is uneven flow field at the inflow position. The distortion of the incoming flow causes the inlet flow field of the pump to be redistributed, thereby influencing the external characteristics, hydrodynamic characteristics, hydraulic load and the like of the pump. However, there has been no breakthrough progress in the theoretical study of the shape of complex structures and fluid flow in inflow aberrations. The complexity of the additional shape makes experimental measurements of the pump flow field difficult.
Disclosure of Invention
The invention aims at solving the defects that the external characteristics, hydrodynamic characteristics, water conservancy loads and the like of a pump are influenced due to the fact that inflow distortion is generated by uneven inflow in the actual working condition of the existing axial flow pump, and provides a novel experimental device for the axial flow pump with the inlet distortion flow field.
The technical scheme of the invention is as follows: a novel experimental device for an axial flow pump with an inlet distorted flow field comprises a water inlet pipe, a 60-degree bent pipe, a water outlet pipe, an impeller and a motor shaft connected with the impeller; the method is characterized in that: a pressure stabilizing system is arranged between the water inlet pipe and the 60-degree bent pipe and consists of a pressure stabilizing box, an annular water inlet pipe, a flowmeter, a water supplementing valve and a water supplementing pump which are connected; the utility model discloses a water inlet pipe, including steady voltage case, water supply pump, moisturizing solenoid valve, flowmeter, air vent and flange, steady voltage case bottom is equipped with the drain hole, be equipped with the floater liquid level ware in the steady voltage case, floater liquid level ware upper end with flange connection, the one end connection of annular inlet tube sets up on the another side of steady voltage case, the other end of annular inlet tube with inlet tube internal connection communicates with each other.
The annular water inlet pipe is a circular ring with the thickness of 4mm, and the water outlet of the annular water inlet pipe is connected to the main flow at the front end of the impeller, so that a distorted inflow is formed.
The pressure stabilizing box is a rectangular water tank sleeved on the water inlet pipe, and is welded with the annular water inlet pipe so as to ensure that the interface is watertight.
The floating ball liquid level device consists of a liquid level sensor, a current converter, a floating ball and a connecting pipe, wherein a wiring reed is arranged in the connecting pipe, the floating ball is sleeved on the connecting pipe, a ring magnet is arranged in the floating ball, and the on-off of the reed is controlled through the magnet.
The number of the floating balls is 2, the floating balls respectively represent the controllable highest water level and the controllable lowest water level, when the liquid level is lower than the set lowest water level, the water supplementing pump is connected in a conducting mode by the reed, the continuous water supplementing function is realized, and the liquid level in the pressure stabilizing box is improved; after the water supplementing pump is disconnected, the water supplementing is stopped, the floating ball and the liquid level are synchronously changed, and the water supplementing pump is disconnected by controlling the reed switch to be closed.
The beneficial effects of the invention are as follows: the novel experimental device for the axial flow pump with the distorted flow field at the inlet is novel in structure and comprises a water inlet pipe, a bent pipe, a water outlet pipe, an impeller, a motor shaft and a pressure stabilizing system, wherein a circular ring with the gap thickness of 4mm is sleeved at the tail end of the inlet pipe, uniform water flow in the circular ring is converged into a main flow, thus inflow distortion is formed, stable water flow in the circular ring is supplied by a water source, water pressure is sent into a pressure stabilizing box by utilizing a water supplementing pump, and the water supplementing electromagnetic valve and the flow meter are sequentially connected after the pressure stabilizing pump according to a water level signal in the box transmitted by a floating ball liquid level sensor in the pressure stabilizing box, so that the effects of adjusting and detecting the flow are achieved. Providing a basis for the actual running condition of the axial flow pump.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention.
In the figure: the water inlet pipe 1, the water supplementing pump 2, the water supplementing electromagnetic valve 3, the flowmeter 4, the floating ball liquid level device 5, the pressure stabilizing box 6, the annular water inlet pipe 7, the impeller 8, the 60-degree bent pipe 9, the motor shaft 10, the water outlet pipe 11, the vent hole 12, the water outlet hole 13 and the connecting flange 14.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in FIG. 1, the novel inlet distortion flow field axial flow pump experimental device comprises a water inlet pipe 1, a 60-degree bent pipe 9, a water outlet pipe 11, an impeller 8 and a motor shaft 10 connected with the impeller 8; a pressure stabilizing system is arranged between the water inlet pipe 1 and the 60-degree bent pipe 9 and consists of a pressure stabilizing box 6, an annular water inlet pipe 7, a flowmeter 4, a water supplementing valve 3 and a water supplementing pump 2 which are connected; the steady voltage case 6 is fixed to be put on the outer wall of inlet tube 1, moisturizing pump 2, moisturizing solenoid valve 3 and flowmeter 4 connect gradually on one side of steady voltage case 6, the water source is through moisturizing pump 2 input to steady voltage case 6 in, steady voltage case 6 top is equipped with air vent 12 and flange 14, steady voltage case 6 bottom is equipped with drain hole 13, be equipped with floater liquid level gauge 5 in the steady voltage case 6, floater liquid level gauge 5 upper end is connected with flange 14, annular inlet tube 7's one end connection sets up on the another side of steady voltage case 6, annular inlet tube 7's the other end communicates with each other with inlet tube 1 internal connection.
As shown in fig. 1, in the novel experimental device for the axial flow pump with the distorted flow field at the inlet, the annular water inlet pipe 7 is a circular ring with the thickness of 4mm, and the water outlet of the annular water inlet pipe 7 is connected to the main flow at the front end of the impeller 8, so that distorted inflow is formed; the pressure stabilizing box 6 is a rectangular water tank sleeved on the water inlet pipe 1, and the pressure stabilizing box 6 is connected with the annular water inlet pipe 7 by welding so as to ensure that the interface is watertight; the floating ball liquid level device 5 consists of a liquid level sensor, a current converter, a floating ball and a connecting pipe, wherein a wiring reed is arranged in the connecting pipe, the floating ball is sleeved on the connecting pipe, a ring magnet is arranged in the floating ball, and the on-off of the reed is controlled by the magnet; the number of the floating balls is 2, and the floating balls respectively represent the controllable highest water level and the controllable lowest water level, when the liquid level is lower than the set lowest water level, the water supplementing pump is connected in a conducting mode by the reed, the continuous water supplementing function is realized, and the liquid level in the pressure stabilizing box is improved; after the water supplementing pump is disconnected, the water supplementing is stopped, the floating ball and the liquid level are synchronously changed, and the water supplementing pump is disconnected by controlling the reed switch to be closed.
As shown in fig. 1, a novel inlet distortion flow field axial flow pump experimental device has the following working principle: when the electromagnetic valve is electrified, the electromagnetic coil generates electromagnetic force to lift the closing member from the valve seat, and the valve is opened; when the power is off, the electromagnetic force disappears, the spring presses the closing member against the valve seat, and the valve is closed. And after the flowmeter is electrified, entering an automatic measurement state. Under the automatic measurement state, the electromagnetic flowmeter automatically completes each measurement function and displays corresponding measurement data. The floating ball liquid level device consists of a liquid level sensor, a current converter, a connecting pipe and two floating balls, wherein the floating balls are installed in a top mode, the floating balls and the liquid level synchronously change, a reed is arranged (connected) in one connecting pipe when the floating ball liquid level device is installed, the connecting pipe is sleeved with one floating ball, a ring magnet is arranged in the floating ball, the on-off of the reed is controlled by the ring magnet, the upper floating ball and the lower floating ball respectively represent the controllable highest water level and the controllable lowest water level, when the liquid level is lower than the set lowest water level, the reed is connected with a water supplementing pump in a conducting mode, the continuous water supplementing function is achieved, and the liquid level in the pressure stabilizing box is improved; and after the water supplementing pump is disconnected, the operation of the water supplementing pump is stopped, and the water supplementing is suspended. In addition, the current converter of the floating ball liquid level device converts the change of the resistance into a standard current signal, and the standard current signal is output by overlapping digital signals, so that the water level signal is accurately displayed in the instrument panel. The upper wiring cable of the floating ball liquid level device is connected with the electromagnetic valve, when the water level arranged in the control chamber is different from the actual liquid level, the electromagnetic valve can adjust the opening according to the difference of the transmitted signals, so that the stability of the liquid level is realized, and the stability of the circumferential speed (the stability of the flow) of the distorted flow field of the inlet is ensured. The pressure stabilizing box utilizes the pressure change of compressed air in the pressure stabilizing box to regulate and press the water delivery quantity, and the flow in the circular ring pipeline is calculated according to the water level height in the instrument panel of the floating ball liquid level meter by controlling the stable water quantity in the pressure stabilizing box. And the flow is detected by the flowmeter, and after the water flow in the circular ring is stable, an experiment of distorted inflow on pump performance test can be performed. The invention realizes the simulation test of complex inlet circumferential distortion inflow through an experimental mode which can be realized, realizes stable flow in the circular pipeline, saves a great amount of manpower, material resources and financial resources and has lower experimental cost.
Claims (5)
1. The novel inlet distortion flow field axial flow pump experimental device comprises a water inlet pipe (1), a 60-degree bent pipe (9), a water outlet pipe (11), an impeller (8) and a motor shaft (10) connected with the impeller (8); the method is characterized in that: a pressure stabilizing system is arranged between the water inlet pipe (1) and the 60-degree bent pipe (9), and the pressure stabilizing system is formed by connecting a pressure stabilizing box (6), an annular water inlet pipe (7), a flowmeter (4), a water supplementing valve (3) and a water supplementing pump (2); the utility model discloses a water inlet pipe, including water inlet pipe (1), water supply pump (2), moisturizing valve (3) and flowmeter (4), water source, water supply, water tank (6) are fixed to be sleeved on the outer wall of water inlet pipe (1), moisturizing pump (2), moisturizing valve (3) and flowmeter (4) connect gradually on one side of water supply pump (6), in water supply pump (2) are input to water supply tank (6), water supply tank (6) top is equipped with air vent (12) and flange (14), water supply hole (13) are equipped with in water supply tank (6), be equipped with floater liquid level gauge (5) in water supply tank (6), floater liquid level gauge (5) upper end with flange (14) are connected, the one end connection of annular inlet tube (7) sets up on the other side of water supply tank (6), the other end of annular inlet tube (7) with inlet tube (1) internal connection communicates with each other.
2. The novel inlet distortion flow field axial flow pump experimental device according to claim 1, wherein: the annular water inlet pipe (7) is a circular ring with the thickness of 4mm, and the water outlet of the annular water inlet pipe (7) is connected to the main flow at the front end of the impeller (8), so that a distorted inflow is formed.
3. The novel inlet distortion flow field axial flow pump experimental device according to claim 1, wherein: the pressure stabilizing box (6) is a rectangular water tank sleeved on the water inlet pipe (1), and the pressure stabilizing box (6) is connected with the annular water inlet pipe (7) by welding so as to ensure that the interface is watertight.
4. The novel inlet distortion flow field axial flow pump experimental device according to claim 1, wherein: the floating ball liquid level device (5) consists of a liquid level sensor, a current converter, a floating ball and a connecting pipe, a wiring reed is arranged in the connecting pipe, the floating ball is sleeved on the connecting pipe, a ring magnet is arranged in the floating ball, and the on-off of the reed is controlled through the magnet.
5. The experimental device for the novel inlet distortion flow field axial flow pump according to claim 4, wherein: the number of the floating balls is 2, the floating balls respectively represent the controllable highest water level and the controllable lowest water level, when the liquid level is lower than the set lowest water level, the water supplementing pump is connected in a conducting mode by the reed, the continuous water supplementing function is realized, and the liquid level in the pressure stabilizing box is improved; after the water supplementing pump is disconnected, the water supplementing is stopped, the floating ball and the liquid level are synchronously changed, and the water supplementing pump is disconnected by controlling the reed switch to be closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192005.1A CN109707636B (en) | 2019-03-14 | 2019-03-14 | Novel inlet distortion flow field axial flow pump experiment device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910192005.1A CN109707636B (en) | 2019-03-14 | 2019-03-14 | Novel inlet distortion flow field axial flow pump experiment device |
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| CN109707636A CN109707636A (en) | 2019-05-03 |
| CN109707636B true CN109707636B (en) | 2023-10-24 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05187383A (en) * | 1992-01-13 | 1993-07-27 | Hitachi Ltd | Vertical shaft pump |
| CN102937104A (en) * | 2012-10-30 | 2013-02-20 | 合肥通用机械研究院 | Turbine compressor test system |
| CN203067354U (en) * | 2013-01-24 | 2013-07-17 | 扬州大学 | Novel sidewise S-shaped shaft extension tubular pump device |
| KR101783248B1 (en) * | 2017-07-27 | 2017-09-29 | 주식회사 스탠더드시험연구소 | The performance test apparatus for vertical and long shaft pump |
| CN109058128A (en) * | 2018-10-28 | 2018-12-21 | 扬州大学 | A kind of novel micro- lift revolution scraping blade pump performance test device |
| CN209671233U (en) * | 2019-03-14 | 2019-11-22 | 扬州大学 | A kind of novel inlet distortions flow field axial-flow pump experimental provision |
-
2019
- 2019-03-14 CN CN201910192005.1A patent/CN109707636B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05187383A (en) * | 1992-01-13 | 1993-07-27 | Hitachi Ltd | Vertical shaft pump |
| CN102937104A (en) * | 2012-10-30 | 2013-02-20 | 合肥通用机械研究院 | Turbine compressor test system |
| CN203067354U (en) * | 2013-01-24 | 2013-07-17 | 扬州大学 | Novel sidewise S-shaped shaft extension tubular pump device |
| KR101783248B1 (en) * | 2017-07-27 | 2017-09-29 | 주식회사 스탠더드시험연구소 | The performance test apparatus for vertical and long shaft pump |
| CN109058128A (en) * | 2018-10-28 | 2018-12-21 | 扬州大学 | A kind of novel micro- lift revolution scraping blade pump performance test device |
| CN209671233U (en) * | 2019-03-14 | 2019-11-22 | 扬州大学 | A kind of novel inlet distortions flow field axial-flow pump experimental provision |
Non-Patent Citations (1)
| Title |
|---|
| S形翼型双向轴流泵能量与空化特性的研究;谢传流;工程科技Ⅱ辑;全文 * |
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