CN203384024U - Solid and liquid two-phase flow pump durability test device - Google Patents
Solid and liquid two-phase flow pump durability test device Download PDFInfo
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- CN203384024U CN203384024U CN201320300005.7U CN201320300005U CN203384024U CN 203384024 U CN203384024 U CN 203384024U CN 201320300005 U CN201320300005 U CN 201320300005U CN 203384024 U CN203384024 U CN 203384024U
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Abstract
The utility model relates to a solid and liquid two-phase flow pump durability test device, consisting of a main loop, a temperature adjusting device, a suction height adjusting mechanism and a flow adjusting device. In a solid and liquid two-phase flow pump wear test, a bypass circulation system is introduced, and solid particles in a medium are guaranteed not to precipitate. A theory that the open area is reduced by the elastic deformation of a rubber hose is adopted, the system flow can be conveniently and rapidly adjusted, and the device wear is reduced; on the basis of an automatic sedimentation layering rule of a two-phase flow medium, a pump inlet suction tube position adjusting device is designed, and the obtaining problem of two-phase flows of different concentrations is solved; aluminum alloy heat sinks are welded on the exterior of a mixing tank, and the radiating requirement of a reliability test can be met.
Description
Technical field
The present invention is a kind of solid-liquid two-phase flow pump durability test device, and the wear problem of solution test pipeline etc., belong to the pump test device field.
Background technique
The slag stock pump is the key equipment of carrying the solid-liquid two-phase flow medium.Can carry the two-phase fluids such as different densities of solid particles, particle diameter, volume concentration, hardness due to it, and the solid particle radius of carrying is large, solid-liquid fluid-mixing flow velocity is higher, flow is larger, so be widely used in the industries such as mining, metallurgy, coal, waterpower, electric power, traffic, papermaking, environmental protection.But, because the general destruction relatively more severe, component of service condition of slag stock pump is very serious, the wear problem of pump is especially outstanding, so in slag stock pump test at present, the main contents of research are its wear resistance problem.At home and abroad there is no at present perfect true two phase flow endurance test bed, the wear resistance of the flow passage components of pump is carried out to the long-term reliability test, the present invention proposes under this background, and the present invention is a kind of two-phase flow pump durability test device and test method thereof.In slag stock pump wear test, introduce the bypass circuit system and solved the particles settling problem, adopt the resiliently deformable principle of rubber hose, invented a kind of area of passage of regulating to reach the Special valve of throttling and adjust flux; The effect that has the automatic sedimentation layering based on two phase flow slag slurry in container, in the concentration difference of mixing tank diverse location two phase flow slag slurry, thereby solve the acquisition problem that the variable concentrations slag is starched.Therefore this test stand has stability and reliability, can improve widely wear resistance and the working life of slag slurry pump test bench.
Through retrieval, and slag stock pump solid-liquid two-phase flow Three dimensional Turbulent and erosion Wearing Characters (Wu Bo. slag stock pump solid-liquid two-phase flow Three dimensional Turbulent and erosion Wearing Characters. the .2010.pp.109 of Central South University～110) the slag stock pump performance test stand that relates in a literary composition mainly consists of motor, test pump, pressure gauge, flowmeter, pipeline, valve, kiln basin, slurry blending device and test system.But in this test stand, valve is to solve the too small problem of its aperture by several gate valves of connecting, yet not from solving in essence its abrasiveness problem, and do not consider the affect situation of temperature on test stand in this test stand, and do not take full advantage of the settlement action of its slag slurry self, obviously there is defect, be not suitable for permanent reliability trial.
Summary of the invention
The technical solution adopted for the present invention to solve the technical problems is:
This solid-liquid two-phase flow pump testing platform mainly is comprised of associated loop such as major loop, temperature-adjusting device, suction head controlling mechanism and solid-liquid two-phase flow flow regulator, two phase flow circulation loops, and wherein major loop is comprised of pipelines such as mixing tank, water pump fixed pedestal, test pump, pump entrance, abrasive rubber flexible pipe, flowmeter, exit of pump, cooling water pipelines.Major loop is connected by flange with the solid-liquid two-phase flow flow regulator, and major loop is also to be connected by flange with the two phase flow circulation loop, and the suction head controlling mechanism is welded on the solid-liquid two-phase flow flow regulator; It is characterized in that described solid-liquid two-phase flow flow regulator built-in cam is circular eccentric wheel, angle of swing by handwheel eccentric adjustment wheel is pushed rubber hose, rubber hose generation resiliently deformable changes the area of passage of slag slurry, but rubber hose two ends flow field change is even, the middle part throttling, realize the effect of slag slurry Flow-rate adjustment and throttling; The suction head controlling mechanism is linked together by two kinds of elements, by the relative position relation of regulating between the two, regulates height; Temperature-adjusting device is realized the adjusting of temperature by the welding radiating fin.Major loop sucks two phase flow from the mixing tank bottom, the two phase flow pipeline of flowing through enters the test pump import, and test pump is got the two phase flow medium again and flowed in mixing tank from the top of mixing tank by rising pipe, realizes medium circulation and pump endurance test.
One of innovative point of the present invention: flow regulator.Usually adopt the lift of valve regulated water pump in pipe-line system, but in valve pass hour, slag slurry two-phase flow speed by valve is very high, and produce whirlpool in the valve front and back, valve internal is produced to heavy wear, thereby on traditional sense the general form of the several gate valves of series connection that adopts to solve the too small problem of single valve opening, though the gate valve fluid resistance is little, open and close and economize power media, yet flowing to unrestricted this does not have from solving in essence the wear problem of valve, therefore the present invention proposes a kind of solid-liquid two-phase flow flow regulator, this device is by dunnage, rubber hose, the elasticity crushing plate, adjustable lever, movable head, cam, the control handwheel forms.
Described cam is circular eccentric wheel.
Described rubber hose is the abrasive rubber bellows, and test takes full advantage of its wear resistance and compressibility admirably, thereby greatly improves the working life of test stand and regulate easily the height of suction port.
Described support plate is square box-like metallic member, one biscuit metal plate is each side arranged one side of its handwheel rotation so that rubber corrugated pipe and circular eccentric wheel import section in the inner, and dunnage inside is fixed in by element in eccentric wheel rotating center place makes the relative position of its rotating center constant.This support plate one side be welded in its width of flange be greater than rubber hose, circular eccentric apart from sum to meet revolution space, the movable head width is slightly less than the width of dunnage, double swerve to guarantee area of passage that it can regulate rubber hose and not, eccentric large footpath is slightly larger than the overcurrent width of rubber hose, the distortion that the width of rubber corrugated pipe is 1.3 times of actual valve gate-width degree flexible pipes when considering real work.
Described handwheel, angle of swing by its eccentric adjustment wheel is pushed rubber hose, rubber hose generation resiliently deformable changes the area of passage of two phase flow, but flexible pipe two ends flow field change is even, the middle part throttling, and the effect of suction port slag slurry Flow-rate adjustment and throttling has been realized in this loop.
This loop structure is simple, easy to operate, from having solved in essence the wear problem of valve, has greatly improved the working life at valve place, has improved its wear-resisting property.
Two of innovative point of the present invention: solid-liquid two-phase flow pump testing platform is closed system, so in the process of water pump operation, the heat that water pump transforms two phase flow medium acting can make medium temperature raise, and when medium temperature during higher than ambient temperature, medium is distribute heat towards periphery also.The variation meeting of heat exerts an influence to the cavitation performance of pump, cavitation can affect again test pump energy response, cause vibrations and noise, and destroy its flow passage components surface, and cavitation damage may reduce the life cycle of test pump greatly, even can produce the major accidents such as leaf destruction or shell perforation when serious.So, for carrying out smoothly for a long time of proof test, sink has been introduced in this invention, radiating fin is welded in outside mixing tank, and is aluminum alloy heat sink, realizes the nature cooling heat dissipation.It is cheap, and weight is lighter, has good heat dispersion, can meet the requirement of heat radiation, and be easy for installation and maintenance.
Automatic sedimentation lamination due to two phase flow in actual tests, in the mixing tank of test, the concentration difference of the At The Height two phase flow that they are different, therefore can pass through to regulate the height of suction pipe to obtain the fluid of variable concentrations in mixing tank.
In the suction head regulation structure, its controlling mechanism, for being threaded, is linked together by two kinds of elements, by the relative position relation of regulating between the two, regulates height, by connecting element, rotatablely moving of screw rod is converted into to the motion of vertical direction.Fix on the support of this structure and be drilled with tapped hole, the screw rod top is welded with handwheel, the screw flight part matches with the support tapped hole, bottom is connected with connecting element, this connecting element is hollow cylindrical, the 2mm gap of having an appointment between screw rod and connecting element, adjustable lever is welded in the connecting element bottom and is fixed in the suction flange place.Thereby the manual rotation handwheel rotates screw rod, the motion of drive connected element, thereby the position of the vertical direction of change adjustable lever, and rubber corrugated pipe has compressibility, change the position of suction flange at the drive lower compression bellows of adjustable lever, realize the adjusting of two phase flow suction port height.
Three of innovative point of the present invention: due to primary element (as orifice plate, teletransmission downhole joint etc.) very easily obstruction in slag stock pump pipeline of pressure transducer, thereby it is broken down when measuring.For head it off, the present invention has introduced slag slurry two phase flow filter screen device when measuring mouth pressure in the pressure transducer place, connect a little pipeline at the export pipeline place, thereby insert filter net sheet in pipeline and prevent that with filtration fraction two phase flow slag slurry pressure transducer from stopping up, the normal pump inlet and outlet pressure of measuring in the proof test process, with the monitoring pump performance.In conjunction with the testing apparatus of invention, and a set of solid-liquid two-phase flow pump durability test method that is applicable to has been proposed.
Usefulness of the present invention is: when solid-liquid two-phase flow pump testing platform moves, can be by the distortion of inlet valve place rubber hose, change area of passage, regulate the flow of water pump two phase flow slag slurry, and can not cause noticeable wear to pipeline, thereby reach the purpose of controlling quickly and easily suction port slag slurry flow; At mixing tank cooling circuit external welding aluminum alloy heat sink to meet the heat radiation requirement; And utilize dexterously the automatic sedimentation effect of two phase flow slag slurry, obtain easily at various height the slag slurry of variable concentrations; One section pipeline is drawn in major loop pressure measurement place, thereby insert filter net sheet in pipeline, with filtration fraction two phase flow impurity, prevents that pressure transducer from stopping up, and guarantees normally carrying out of experiment.By the pressure device of adopting with filter screen, realized the collection of pump inlet and outlet pressure, can monitor in real time pumping head, and propose a kind of test method; And, be equipped with settling tank to recycle this two phase flow below mixing tank, played the effect of environmental protection.
The invention solves routine test deck valve door wear problem, extended the working life of solid-liquid two-phase flow pump by the radiating fin thermal Equilibrium Design, realized pressure measurement by the pressure device of adopting with filter screen, and proposed a kind of durability test method, and improved the reliability of its wear resistance and long time test.
The accompanying drawing explanation
Fig. 1 is solid-liquid two-phase flow pump testing platform schematic diagram;
Fig. 2 is solid-liquid two-phase flow flow regulator schematic diagram;
Fig. 3 is suction head controlling mechanism schematic diagram;
Fig. 4 is pressure transducer place two phase flow filtrating equipment schematic diagram;
Fig. 5 is that pressure transducer place two phase flow filters the filter structure schematic diagram;
Fig. 6 is aluminum alloy heat sink profile plan view and plan view.
In Fig. 1,1. import pressure measurement tank filter net sheet, 2. inlet pressure sensor, 3. outlet pressure sensor, 4. radiating fin, 5. flange, 6. rubber hose, 7. gate valve, 8. settling tank, 9. mixing tank, 10. suction head controlling mechanism, 11. circulation loop solid-liquid two-phase flow flow regulator, 12. two phase flow recycle pumps, 13. highly regulate support, 14. Observation telescope, 15. major loop solid-liquid two-phase flow flow regulator, 16. flow harvesters, 17. two phase flow test pumps, 18. rotational speed and torque instrument, 19. coupling, 20. motors, 21. test pumps are installed fixed pedestal.
In Fig. 2,22. dunnages, 6. rubber hose, 23. elastic plates, 24. adjustable levers, 25. movable heads, 26. eccentric wheels, 27. angle of swing adjusting handles.
In Fig. 3,28. height adjusting handles, 29. pads, 30. screw rods, 31. links, 32. adjustable levers.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Refer to accompanying drawing 1, the test concrete grammar is: according to the two phase flow test requirements document, granularity and the concentration of preparation two phase flow medium, start two phase flow recycle pump (12), guarantees the uniformity of the two phase flow medium in mixing tank (9), prevents precipitation or inhomogeneous.Two phase flow test pump (17), motor (20) is fixed in test pump to be installed on fixed pedestal (21), start two phase flow test pump (17), in this test, bottom thickness is 20mm, transverse tooth thickness is 16mm, the radiating fin that tooth depth is 150mm (4) welding and mixing tank (9) outside, when carrying out, test sucks the two phase flow medium from mixing tank (9) inside, enter rubber corrugated pipe (6), the flange (5) of flowing through, the two phase flow medium flows to Observation telescope (14) along pipeline and locates, can observe the mobility status of pipeline inside by Observation telescope (14), size by pump inlet pressure transducer (3) and outlet pressure sensor (2) measuring pressure, at this, locate by the filtration of filtering filter screen (1) contaminant filter, prevent that sensor from stopping up, guarantee the accuracy of experiment, and the filtration aperture of filter screen is 0.2mm.The two phase flow medium enters test pump (17), and coupling (19) is connected with motor (20) herein, and measures rotating speed and the moment of torsion of two phase flow test pump (17) by rotational speed and torque instrument (18), and then can obtain the power of pump.The solid-liquid two-phase flow medium is after test pump is got, can be measured the flow of pump by flow system flow collecting device (16), flow regulator (11) changes rate-of flow, realize the test under the different flow operating mode, in this circulation loop, the two phase flow medium finally enters mixing tank (9) inside along pipeline.
Two phase flow recycle pump (12) sucks the two phase flow medium from mixing tank (9) middle part constantly, locate to change rate-of flow at flow regulator (11), and it is squeezed in mixing tank (9), test is carried out continuously, adopted computer data acquisition system can monitor in real time pump performance (being the indexs such as lift of pump, flow, input power, efficiency).After the test that completes regulation, can stop test, the test pump flow passage components are taken apart, adopt weight method to be weighed respectively to parts such as impeller and the pump housings, the relation of quantitative analysis pump flow passage components wear extent and pump performance, determine the evaluation index of wear test result; After also can wearing and tearing by three-dimensional reverse forming technique, flow passage components are again three-dimensionally shaped, analyse in depth wear extent and the rule thereof of the different pieces such as impeller, the pump housing and front and rear cover plate, the degree of wear of quantitative analysis different parts.
Flow regulator, refer to accompanying drawing 2, and eccentric wheel (26) is fixed in dunnage (22) inside, and the position of its rotating center does not change.The two phase flow MEDIA FLOW is taken turns the angle of swing of (26) when rubber hose by handwheel (27) eccentric adjustment, eccentric wheel (26) promotes movable head (25) thereby drives adjustable lever (24), elastic plate (23) motion, thereby elastic plate (23) extruding rubber hose (6), flexible pipe generation resiliently deformable changes the area of passage of two phase flow, thereby realized rapidly the adjusting to two-phase flow, when eccentric wheel (26) can be realized the throttling to whole loop while rotating to certain position.
The height-adjusting device of test pump inlet ductwork, refer to accompanying drawing 3, and suction head controlling mechanism (10) is supported by support (13), pad (29) enlarge active surface, the damage of having avoided screw rod (30) to be connected with support (13).The screw rod (30) that rotarily drives by height adjusting handle (28) rotates, at link (31), locate rotatablely moving of screw rod (30) become to the motion of Vertical direction, thereby change the vertical position of adjustable lever (32), and then the position of change suction flange (3), realize the adjusting to the suction port height.Position difference in mixing tank (9), the concentration difference of two phase flow medium.
The two phase flow medium flows out from mixing tank (9), control by gate valve (7) flow that the two phase flow medium flows out, thereby this two phase flow medium enters settling tank (8), realizes the recycling of two phase flow medium.
By sampling method, measure quality m, the volume v of outlet port two phase flow medium in the mixing tank outlet port, by concentration formula m/v, be can be calculated the concentration of solid two phase flow.
Claims (4)
1. a solid-liquid two-phase flow pump durability test device, comprise that major loop, temperature-adjusting device (4), suction head controlling mechanism (10), solid-liquid two-phase flow flow regulator (11) and two phase flow circulation loop form, described major loop is connected by flange (5) with solid-liquid two-phase flow flow regulator (11), major loop is also to be connected by flange (5) with the two phase flow circulation loop, and suction head controlling mechanism (10) is welded on solid-liquid two-phase flow flow regulator (11); It is characterized in that described solid-liquid two-phase flow flow regulator (11) built-in cam is circular eccentric wheel, angle of swing by handwheel (27) eccentric adjustment wheel (26) is pushed rubber hose (6), the area of passage that resiliently deformable changes the slag slurry occurs in rubber hose (6), rubber hose (6) but the two ends flow field change evenly, the middle part throttling, realize the effect of slag slurry Flow-rate adjustment and throttling; Suction head controlling mechanism (10) is linked together by two kinds of elements, by the relative position relation of regulating between the two, regulates height; Temperature-adjusting device (4) is realized the adjusting of temperature by the welding radiating fin.
2. solid-liquid two-phase flow pump durability test device as claimed in claim 1, is characterized in that suction head controlling mechanism (10) is converted into the motion of vertical direction by connecting element (31) by rotatablely moving of screw rod (30).
3. solid-liquid two-phase flow pump durability test device as claimed in claim 1, is characterized in that the radiating fin of temperature-adjusting device (4) is welded in mixing tank (9) outside, and radiating fin is aluminum alloy heat sink, realizes the nature cooling heat dissipation.
4. solid-liquid two-phase flow pump durability test device as claimed in claim 1, it is characterized in that drawing one section pipeline in major loop pressure measurement place, insert filter net sheet (1) in pipeline thus prevent that with filtration fraction two phase flow impurity pressure transducer (2) from stopping up, guarantee normally carrying out of experiment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320300005.7U CN203384024U (en) | 2013-05-23 | 2013-05-23 | Solid and liquid two-phase flow pump durability test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320300005.7U CN203384024U (en) | 2013-05-23 | 2013-05-23 | Solid and liquid two-phase flow pump durability test device |
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| CN203384024U true CN203384024U (en) | 2014-01-08 |
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| CN201320300005.7U Expired - Fee Related CN203384024U (en) | 2013-05-23 | 2013-05-23 | Solid and liquid two-phase flow pump durability test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410743A (en) * | 2013-05-23 | 2013-11-27 | 江苏大学 | Durability testing device and testing method of solid-liquid two-phase flow pump |
| CN109242871A (en) * | 2018-08-09 | 2019-01-18 | 江苏大学镇江流体工程装备技术研究院 | Solid-liquid two-phase flow measurement method in a kind of water pump system based on Echo-PIV |
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2013
- 2013-05-23 CN CN201320300005.7U patent/CN203384024U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410743A (en) * | 2013-05-23 | 2013-11-27 | 江苏大学 | Durability testing device and testing method of solid-liquid two-phase flow pump |
| CN103410743B (en) * | 2013-05-23 | 2016-08-17 | 江苏大学 | A kind of solid-liquid two-phase flow pump durability test device and test method |
| CN109242871A (en) * | 2018-08-09 | 2019-01-18 | 江苏大学镇江流体工程装备技术研究院 | Solid-liquid two-phase flow measurement method in a kind of water pump system based on Echo-PIV |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20180523 |
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| CF01 | Termination of patent right due to non-payment of annual fee |