CN105403396A - Pump self-priming process internal and external characteristic cooperation test system - Google Patents
Pump self-priming process internal and external characteristic cooperation test system Download PDFInfo
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- CN105403396A CN105403396A CN201510936901.6A CN201510936901A CN105403396A CN 105403396 A CN105403396 A CN 105403396A CN 201510936901 A CN201510936901 A CN 201510936901A CN 105403396 A CN105403396 A CN 105403396A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention relates to a pump self-priming process internal and external characteristic cooperation test system. The system comprises a water tank and a self-primping centrifugal pump, an outlet pipe and an inlet pipe of the self-primping centrifugal pump are connected with the water tank, and the outlet pipe of the self-primping centrifugal pump is provided with a first gate valve, an electromagnetic flowmeter and an outlet pressure sensor; the inlet pipe of the self-primping centrifugal pump is successively provided with a second gate valve, a Coriolis mass flowmeter and an inlet pressure sensor, the self-primping centrifugal pump is connected with a motor, the motor is provided with a shaft encoder, a high-speed camera and an LED light source are arranged beside the self-primping centrifugal pump, and the high-speed camera is successively connected with a signal gatherer and a computer; and the Coriolis mass flowmeter, the inlet pressure sensor, the outlet pressure sensor and the shaft encoder are respectively connected with the computer through an NI virtual instrument. According to the invention, when external characteristics of a pump such as waterpower performance, self-priming performance and the like are measured, internal flow characteristics such as gas-liquid suction, gas-liquid mixing, gas-liquid separation, gas discharge and water backflow and the like in a self-priming process are observed through the high-speed photography system.
Description
Technical field
The invention belongs to fluid machinery experiment field, the interior external characteristics being specially a kind of pump self-priming process works in coordination with test macro, is mainly used in measuring pump self-priming performance external characteristics and gas liquid two-phase flow internal characteristic simultaneously.
Background technology
Self-priming pump is a kind of special centrifugal pump, pours water when only needing first time to start, and starts each time later and the air in pipeline and the pump housing can be discharged, then normally water delivery.It is the critical component of small-sized irrigation unit, is widely used in rural area and moves irrigation, flowing work, starts occasion that is frequent and filling liquid difficulty.Self-priming pump, except the water-power performance parameters such as flow, lift, efficiency, also has the parameter such as self-priming time, suction lift as the important evaluation index of self-priming performance.The self-priming mechanism of research self-priming pump, the agricultural equipment innovation that the self-priming performance improving pump even accelerates country for Development of Water-Saving Irrigation technology has certain positive role.
Experimental study aspect at present for self-priming pump lays particular emphasis on self-priming pump partial structurtes size mostly in the impact of self-priming performance, and in the change of local pressure change and external characteristics, and for pump self-priming process gas liquid two-phase flow internal characteristic micro-variations, and the macroscopic view of the external characteristics such as this micro-variations and flow, lift, efficiency change between the research of relation also little.
Through retrieval, a kind of high priming stroke self priming pump suction lift test board (201210140932.7) by increasing adjustable freq uency conversion supercharging pump with the pressure head of supplementary fluidic device thrower inflow point on blowback water pipe, increase electronic uniform-pressure-drop valve to increase the pressure drop of pump inlet, the actual installation height that final realization does not change test board meets the needs of high priming stroke self priming pump test.But this testing table is only applicable to the test of self-priming pump self-priming performance external characteristics, when carrying out the analysis of self-priming pump self-priming process internal flow-field test, needs again to build testing table, improve time cost and financial cost, reduce service efficiency.Therefore, in order to study the gas liquid two-phase flow rule of pump self-priming process, improve the self-priming performance of pump, even deeply understand the self-priming mechanism of pump, measure pump self-priming process self-priming performance external characteristics and gas liquid two-phase flow internal characteristic is the important means of self-priming pump experimental study simultaneously.
Summary of the invention
The object of the invention is for current self-priming pump testing table function singleness, the limitation such as complex structure, the interior external characteristics providing a kind of pump self-priming process works in coordination with test macro, this system is mainly used in the test of pump self-priming process, pump hydraulic performance can be measured simultaneously, the external characteristics such as self-priming performance and gas liquid two-phase flow internal characteristic, obtain pump self-priming process inlet and outlet pressure, gas-liquid mixed in the transient changing of liquid phase flow and wheel speed and self-priming pump, gas-liquid separation, bubble is discharged, liquid backflow and bubble are at impeller, spiral case, the detailed process of the indoor motion of gas-liquid separation.
Technical scheme of the present invention is: in a kind of pump self-priming process, external characteristics works in coordination with test macro, comprise water tank and self-priming centrifugal pump, the outlet conduit of described self-priming centrifugal pump is all connected with described water tank with inlet duct, and the outlet conduit of described self-priming centrifugal pump is provided with the first gate valve, electromagnetic flowmeter and outlet pressure sensor successively from water tank side; The inlet duct of described self-priming centrifugal pump is provided with from water tank side the second gate valve, section's formula mass flowmeter and inlet pressure sensor successively, described self-absorption centrifugal Pump and Electromotor connects, described motor is provided with shaft encoder, described self-priming centrifugal pump is other is also provided with high-speed camera and LED light source, and described high-speed camera is connection signal collector and computing machine successively; Described section formula mass flowmeter, described inlet pressure sensor, described outlet pressure sensor are also connected with described computing machine respectively by NI virtual instrument with described shaft encoder.
In such scheme, described water tank bottom is also provided with draining valve.
In such scheme, described water tank is transparent water tank, and outside is provided with the rule of directly reflection self-priming centrifugal pump suction lift.
In such scheme, described self-priming centrifugal pump is transparent organic glass, and inlet ductwork and the export pipeline of described self-priming centrifugal pump are stainless steel.
In such scheme, described motor is variable-frequency motor.
In such scheme, described self-priming centrifugal pump, described electromagnetic flowmeter, described section formula mass flowmeter, described first gate valve and described second gate valve with all by Flange joint on pipeline.
In such scheme, the zero graduation line of described rule is on the straight line at described self-priming centrifugal pump inlet ductwork center line place.
The present invention has following characteristics: (1) the present invention is made up of self-priming centrifugal pump and pipe system, dynamic test system and high-speed photography system three digest journals, external characteristics and the self-priming process gas liquid two-phase flow internal characteristics such as self-priming centrifugal pump hydraulic performance, self-priming performance can be measured simultaneously, structure is simple, diverse in function.(2) the flowmeter employing section formula mass flowmeter of inlet ductwork of the present invention, inlet ductwork liquid phase flow is measured when inverted triangle shape is installed, measure inlet ductwork gas phase flow rate when positive triangular shape is installed, the biphase gas and liquid flow dynamic characteristic of pump self-priming process can be analyzed simultaneously according to gas flow and fluid flow.(3) controlled the height of liquid level in water tank by draining valve, and then control the suction lift of self-priming centrifugal pump, the interior external characteristics under the different suction lift of convenient research.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that interior external characteristics of the present invention works in coordination with test macro.
The schematic diagram that Tu2Shi section formula mass flowmeter inverted triangle is installed.
The schematic diagram that the positive triangle of Tu3Shi section formula mass flowmeter is installed.
In figure: 1. water tank; 2. the first gate valve; 3. electromagnetic flowmeter; 4. section's formula mass flowmeter; 5. inlet pressure sensor; 6. outlet pressure sensor; 7. self-priming centrifugal pump; 8. motor; 9. shaft encoder; 10. draining valve; 11. rules; 12. second gate valves; 13. signal pickers; 14. computing machines; 15. high-speed cameras; 16.LED light source; 17.NI virtual instrument.
Embodiment
Accompanying drawing 1 is a specific embodiment of the present invention, and below in conjunction with specific embodiment, the invention will be further described.Interior external characteristics of the present invention works in coordination with test macro, comprises self-priming centrifugal pump and pipe system, dynamic test system and high-speed photography system etc.Dynamic test system comprises electromagnetic flowmeter 3, section's formula mass flowmeter 4, inlet pressure sensor 5, outlet pressure sensor 6, shaft encoder 9, NI virtual instrument 17, LabVIEW programming platform and computing machine 14.High-speed photography system comprises high-speed camera 15, signal picker 13, computing machine 14 and LED light source 16.Self-priming centrifugal pump 7 export pipeline is arranged vertically, and stretches into water tank 1 successively after connection outlet pressure transducer 6, electromagnetic flowmeter 3, first gate valve 2.Self-priming centrifugal pump 7 inlet ductwork is horizontally disposed, connects water tank 1, second gate valve 12, section's formula mass flowmeter 4, inlet pressure sensor 5 successively by the flow direction of fluid.Water tank 1 is transparent water tank, and lower end is provided with draining valve 10, and outside is provided with the rule 11 of directly reflection self-priming centrifugal pump 7 suction lift, and the scale of the rule 11 that liquid level position real-time in water tank 1 is corresponding is the suction lift of now self-priming centrifugal pump.High-speed camera 15 is connection signal collector 13, computing machine 14 successively.Electromagnetic flowmeter 3, section's formula mass flowmeter 4, inlet pressure sensor 5, outlet pressure sensor 6, shaft encoder 9 connect NI virtual instrument 17 and computing machine 14 successively.Section's formula mass flowmeter 4 adopts the OPTIMASS6000 type mass flowmeter of Cologne, Germany, as shown in Figures 2 and 3, measures inlet ductwork liquid phase flow, measure inlet ductwork gas phase flow rate when positive triangular shape is installed when inverted triangle shape is installed.In addition, the transparent organic glass that self-priming centrifugal pump 7 is is prototype with 65ZB-40C type exterior mixing self priming pump for sprinkling irrigation, import and export pipeline is stainless steel, and motor 8 is variable-frequency motor.Self-priming centrifugal pump 7, electromagnetic flowmeter 3, section's formula mass flowmeter 4, first gate valve 2, second gate valve 12 all adopt Flange joint with the connection of pipeline, and the zero graduation line of rule 11 is in self-priming centrifugal pump 7 inlet ductwork center line same level position.
Before on-test, open the first gate valve 2 and the second gate valve 12, close draining valve 10, keep the liquid level in water tank 1 and self-priming centrifugal pump 7 inlet ductwork center line to keep same level position, initial suction lift is zero, start water pump, under the effect of impeller, the air in the water in self-priming centrifugal pump 7 and inlet ductwork and the pump housing carries out gas-liquid mixed and gas-liquid separation, and the gas in laggard mouth pipeline after a while and the pump housing is fully drained, self-priming completes, and enters normal water delivery process.In this self-priming process, inlet pressure sensor 5 measures the intake pressure variable signal of pump self-priming process, outlet pressure sensor 6 measures the variable signal of pump discharge pressure, the variable signal of the fluid flow of pump discharge pipeline measured by electromagnetic flowmeter 3, the mounting means of change section formula mass flowmeter 4, first anti-triangle installs and measures the fluid flow variable signal of pump inlet pipeline, positive triangle installs and measures the gas flow variable signal of pump inlet pipeline again, shaft encoder 9 measures the variable signal of wheel speed, through the process of computing machine 14 after these signals are gathered by NI virtual instrument 17, by LabVIEW directly output from being drawn through stroke pressure, flow, the time history plots such as rotating speed.Before carrying out high-speed photography shooting, first by the camera lens of tripod and camera, clearly focused in the regions such as the impeller be taken and spiral case, by LED light source to the region light filling that is taken, the image of the pump self-priming process that high-speed camera 15 photographs is stored in computing machine 14 through signal picker 13.Open draining valve, reduce the water yield in water tank, under the suction lift of 0.2m, 0.4m, 0.6m, 0.8m, 1m and 1.2m, repeat aforesaid operations respectively.
Claims (7)
1. in a pump self-priming process, external characteristics works in coordination with test macro, it is characterized in that: comprise water tank (1) and self-priming centrifugal pump (7), the outlet conduit of described self-priming centrifugal pump (7) is all connected with described water tank (1) with inlet duct, and the outlet conduit of described self-priming centrifugal pump (7) is provided with the first gate valve (2), electromagnetic flowmeter (3) and outlet pressure sensor (6) successively from water tank (1) side; The inlet duct of described self-priming centrifugal pump (7) is provided with the second gate valve (12), section's formula mass flowmeter (4) and inlet pressure sensor (5) successively from water tank (1) side, described self-priming centrifugal pump (7) is connected with motor (8), described motor (8) is provided with shaft encoder (9), described self-priming centrifugal pump (7) is other is also provided with high-speed camera (15) and LED light source (16), and described high-speed camera (15) is connection signal collector (13) and computing machine (14) successively; Described section's formula mass flowmeter (4), described inlet pressure sensor (5), described outlet pressure sensor (6) are also connected with described computing machine (14) respectively by NI virtual instrument (17) with described shaft encoder (9).
2. in a kind of pump self-priming process according to claim 1, external characteristics works in coordination with test macro, it is characterized in that: described water tank (1) bottom is also provided with draining valve (10).
3. in a kind of pump self-priming process according to claim 1 and 2, external characteristics works in coordination with test macro, it is characterized in that: described water tank (1) is transparent water tank, and outside is provided with the rule (11) of directly reflection self-priming centrifugal pump suction lift.
4. in a kind of pump self-priming process according to claim 1 and 2, external characteristics works in coordination with test macro, and it is characterized in that: described self-priming centrifugal pump (7) is transparent organic glass, inlet ductwork and the export pipeline of described self-priming centrifugal pump (7) are stainless steel.
5. in a kind of pump self-priming process according to claim 1 and 2, external characteristics works in coordination with test macro, it is characterized in that: described motor (8) is variable-frequency motor.
6. in a kind of pump self-priming process according to claim 1 and 2, external characteristics works in coordination with test macro, it is characterized in that: described self-priming centrifugal pump (7), described electromagnetic flowmeter (3), described section's formula mass flowmeter (4), described first gate valve (2) and described second gate valve (12) with all by Flange joint on pipeline.
7. in a kind of pump self-priming process according to claim 3, external characteristics works in coordination with test macro, it is characterized in that: the zero graduation line of described rule (11) is on the straight line at described self-priming centrifugal pump (7) inlet ductwork center line place.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510936901.6A CN105403396B (en) | 2015-12-16 | 2015-12-16 | External characteristics cooperates with test system in a kind of pump self-priming process |
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| CN201510936901.6A CN105403396B (en) | 2015-12-16 | 2015-12-16 | External characteristics cooperates with test system in a kind of pump self-priming process |
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| CN105403396A true CN105403396A (en) | 2016-03-16 |
| CN105403396B CN105403396B (en) | 2017-10-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909536A (en) * | 2016-05-10 | 2016-08-31 | 浙江理工大学 | Gas-liquid two-phase flow performance testing system and method for centrifugal pump |
| CN106050684A (en) * | 2016-05-31 | 2016-10-26 | 江苏大学 | High-speed photographing test stand for coarse particle solid-liquid two-phase flow in centrifugal pump |
| CN107970826A (en) * | 2017-11-27 | 2018-05-01 | 江苏大学 | A kind of agitating device |
| CN109296566A (en) * | 2018-09-28 | 2019-02-01 | 西安理工大学 | Liquid phase mobile observation device inside centrifugal pump |
| CN110259701A (en) * | 2019-06-11 | 2019-09-20 | 江苏大学镇江流体工程装备技术研究院 | A kind of self-priming pump test device |
| CN114704477A (en) * | 2022-04-15 | 2022-07-05 | 中国计量大学 | Self-priming height testing device and method for self-priming pump |
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| JP2009007958A (en) * | 2007-06-26 | 2009-01-15 | Panasonic Electric Works Co Ltd | Centrifugal pump |
| CN102913463A (en) * | 2012-05-09 | 2013-02-06 | 江苏大学 | Self-priming height test bed for self-priming pump with high priming travel |
| CN103631992A (en) * | 2013-11-07 | 2014-03-12 | 华南理工大学 | Computing method for flow simulation in self-priming process of self-priming pump |
| CN204493207U (en) * | 2015-02-11 | 2015-07-22 | 张诗山 | Jet type self-suction centrifugal pump |
| CN205262723U (en) * | 2015-12-16 | 2016-05-25 | 江苏大学 | Pump is from interior external characteristics of process of inhaling in coordination with test system |
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2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009007958A (en) * | 2007-06-26 | 2009-01-15 | Panasonic Electric Works Co Ltd | Centrifugal pump |
| CN102913463A (en) * | 2012-05-09 | 2013-02-06 | 江苏大学 | Self-priming height test bed for self-priming pump with high priming travel |
| CN103631992A (en) * | 2013-11-07 | 2014-03-12 | 华南理工大学 | Computing method for flow simulation in self-priming process of self-priming pump |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909536A (en) * | 2016-05-10 | 2016-08-31 | 浙江理工大学 | Gas-liquid two-phase flow performance testing system and method for centrifugal pump |
| CN106050684A (en) * | 2016-05-31 | 2016-10-26 | 江苏大学 | High-speed photographing test stand for coarse particle solid-liquid two-phase flow in centrifugal pump |
| CN107970826A (en) * | 2017-11-27 | 2018-05-01 | 江苏大学 | A kind of agitating device |
| CN107970826B (en) * | 2017-11-27 | 2020-07-31 | 江苏大学 | Stirring device |
| CN109296566A (en) * | 2018-09-28 | 2019-02-01 | 西安理工大学 | Liquid phase mobile observation device inside centrifugal pump |
| CN110259701A (en) * | 2019-06-11 | 2019-09-20 | 江苏大学镇江流体工程装备技术研究院 | A kind of self-priming pump test device |
| CN114704477A (en) * | 2022-04-15 | 2022-07-05 | 中国计量大学 | Self-priming height testing device and method for self-priming pump |
| CN114704477B (en) * | 2022-04-15 | 2023-09-15 | 中国计量大学 | Self-priming height testing device and method for self-priming pump |
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