CN102621045B - Probability distribution test device for collision by abrasive particles in solid and liquid two-phase flow on wall surface at different positions - Google Patents
Probability distribution test device for collision by abrasive particles in solid and liquid two-phase flow on wall surface at different positions Download PDFInfo
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- CN102621045B CN102621045B CN201210100406.8A CN201210100406A CN102621045B CN 102621045 B CN102621045 B CN 102621045B CN 201210100406 A CN201210100406 A CN 201210100406A CN 102621045 B CN102621045 B CN 102621045B
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Abstract
The invention discloses a probability distribution test device for collision by abrasive particles in solid and liquid two-phase flow on a wall surface at different positions. The probability distribution test device comprises a solid and liquid two-phase flow circulation system, a pressure sensor and a computer postprocessing system, wherein a solid and liquid two-phase flow circulation system model comprises a submersible pump, an abrasive material box, a stirrer, a hose, a restraint flow channel with a structural surface and an overflow pipe for preventing soft abrasive particles from overflowing; the pressure sensor comprises a strain gauge matrix and a preprocessing circuit; the computer postprocessing system comprises a probability distribution test module for reading a digital signal from the preprocessing circuit through a computer serial port and performing analytic processing on the digital signal; and an average pressure value of each region subjected to grid division during fluent value simulation is used as a pressure signal base value and filtered from a pressure signal obtained from the preprocessing circuit, so that the pressure distribution of the abrasive particles in the solid and liquid two-phase flow on the wall surface at different positions can be obtained. By utilizing the probability distribution test device, the probability distribution of collision by the abrasive particles on the wall surface can be measured precisely.
Description
Technical field
The present invention relates to soft abrasive fluid Precision Machining field, is that in a kind of solid-liquid two-phase flow, abrasive particle collides the probability distribution proving installation of wall at diverse location.
Background technology
Mould is industrial basic technology equipment, is the basic industry of national economy, and nowadays China has become the big country of mould production and consumption.Along with developing rapidly of the fields such as automobile, motor, instrument, electrical equipment, electronics, communication, household electrical appliances, light industry, requirement to mould is more and more urgent, accuracy requirement is more and more higher, structural requirement also becomes increasingly complex, the height of mould production technology, has become the important symbol of the manufacture level of weighing a national product.In die manufacture, in order to eliminate the residual machining marks of die surface, Finishing has become necessary process procedure, accounts for the more than 50% of whole mould manufacturing time.In the face of special-shaped surfaces (being defined as patterned surface herein) such as ditch related in mould manufacture, groove, hole, prism, narrow slits, utilize present stage by instrument contact or add trade union near work surface and leave a trace at die surface.Soft abrasive fluid is to be mixed by discrete particles and liquid, the liquid fixed double phase flow with weak stickiness forming forms turbulent flow at the patterned surface of workpiece to be machined, and be equipped with constraints module, on processing work surface, form constraint runner, what drive that abrasive particle carries out multi-angle to wall micro-ly cuts micro-effect of cutting, final implementation structure surface without tool Precision Machining.
In the end runner of soft abrasive fluid patterned surface, due to the driving effect of fluid-phase, between abrasive particle and abrasive particle, between abrasive particle and wall, bump, thereby make abrasive particle constantly wash away wall, wall is subject to the multi-angle shear action of particle and weares and teares.The processing effect of patterned surface is directly relevant with frequency and the pressure of wall collision, by the position analysis to soft abrasive fluid abrasive particle collision wall, can easily analyze particular location and the abrasion condition of abrasive particle effect wall, thereby provide theoretical foundation for analyzing soft abrasive fluid processing.
In actual process, constraint runner is not only complicated but also narrow, and the frequent high velocity impact wall of abrasive particle, cannot truly observe the probability distribution situation of particle effect wall, and the processing of the soft abrasive fluid of present stage mainly concentrates on theoretical analysis and experiment simulation, aspect experimental observation soft abrasive fluid crash featureization surface, research is also weaker.In view of soft abrasive fluid carries out at patterned surface the vital role playing in Precision Machining, design abrasive particle in a kind of solid-liquid two-phase flow, in probability distribution observation device and the method for diverse location collision wall, the further research of soft abrasive fluid is had to its profound significance.
Summary of the invention
In order to overcome in the runner of existing solid-liquid two-phase flow the deficiency of probability distribution that cannot authentic testing abrasive particle collision wall, the invention provides a kind of energy and measure in the solid-liquid two-phase flow of probability distribution of abrasive particle collision wall abrasive particle at the probability distribution proving installation of diverse location collision wall more accurately.
The technical solution adopted for the present invention to solve the technical problems is:
In solid-liquid two-phase flow, abrasive particle is at a probability distribution proving installation for diverse location collision wall, and described probability distribution proving installation comprises the solid-liquid two-phase flow circulation system, pressure transducer and Computer reprocessing system;
Described solid-liquid two-phase flow circulation system model comprises submersible pump, abrasive material case, stirrer, flexible pipe, has the constraint runner of patterned surface and prevent the run-down pipe that soft abrasive fluid overflows; In described abrasive particle case, place submersible pump, described submersible pump is connected with the described constraint runner entrance with patterned surface by described inlet hose, the described patterned surface constraint runner exit that has is connected with described outlet hose, described outlet hose is connected with described abrasive material case, in described abrasive particle case, be equipped with stirrer, described abrasive material lower box part side is provided with described run-down pipe;
Described pressure transducer comprises foil gauge matrix and pre-process circuit, the lower surface that described foil gauge matrix is sealing adhesive at sheet metal by a series of foil gauges forms, and be affixed on the wall of the constraint runner with patterned surface, utilize fluent emulation to obtain the pressure distribution in runner, and distribute and carry out region division according to pressure gradient, described foil gauge matrix is pasted according to pressure zoning;
Described Computer reprocessing system: probability distribution test module, in order to read digital signal by serial ports of computers and carry out analyzing and processing from described pre-process circuit, using the pressure average in each region of carrying out grid division in fluent numerical simulation as the pressure signal base value at this place, elimination in the pressure signal obtaining from described pre-process circuit again, finally obtains abrasive particle in solid-liquid two-phase flow and at diverse location, collides the pressure distribution of wall.
Further, it is described that to have patterned surface constraint cross section of fluid channel import large outlet little, the described constraint runner with patterned surface is placed on laboratory bench, the described constraint runner left and right sides with patterned surface connects respectively inlet hose and outlet hose, described inlet hose be communicated with described submersible pump and described in there is the constraint runner of patterned surface, described in described outlet hose is communicated with, there is constraint runner and the described abrasive material case of patterned surface.
Further again, described pre-process circuit comprises Huygens's electric bridge, amplifier, A/D converter, storer and processor, described foil gauge matrix can be converted into abrasive particle in solid-liquid two-phase flow the variation of resistance at the pressure of diverse location collision wall, described Huygens's electric bridge is converted into the resistance variations of described foil gauge matrix the variation of voltage, and change into digital signal through described amplifier and A/D converter, be stored in described storer.
Technical conceive of the present invention is: this proving installation is comprised of the solid-liquid two-phase flow circulation system, pressure transducer and Computer reprocessing system three parts.In the solid-liquid two-phase flow circulation system, the constraint runner with patterned surface squeezed into the solid-liquid two-phase flow that contains abrasive particle by submersible pump by entrance flexible pipe, forms turbulent flow.Abrasive Flow is under the driving effect of turbulent flow, with the sheet metal upper surface generation different angles frequent impact effect that sticks at the foil gauge matrix of patterned surface, sheet metal is deformed under abrasive Flow effect of impact, foil gauge is converted into the strain of sheet metal diverse location the variation of resistance, pre-process circuit changes voltage signal into foil gauge resistance signal, through memory stores, and the voltage signal of storing in storer comprises that sheet metal is subject to the deformation of abrasive particle collision wall and the deformation that hydraulic pressure causes, the deformation voltage signal of removing water flow pressure effect is only us and tests needed.Wherein, the pressure that abrasive particle acts on internal face is produced by collision.The collision time of abrasive particle and internal face is extremely of short duration, and the acting force that it imposes on internal face is discontinuous, but a large amount of abrasive particle collides wall continually, from macroscopic view, can think abrasive particle to the acting force of internal face be continue, uniformly.From single abrasive particle angle, the quality of abrasive particle is larger, speed is larger, the mean kinetic energy that is abrasive particle is larger, it is larger to the acting force of internal face that each abrasive particle hits an internal face, and the number of times of abrasive particle shock wall is more in the unit interval, also larger to the general pressure of wall, and clash into number of times, depend on abrasive particle number (dense degree of abrasive particle) and mean kinetic energy in unit volume.So abrasive particle acts on mean kinetic energy and dense degree that the pressure of internal face is decided by abrasive particle.On this basis, reprocessing analysis software reads digital signal and carries out analyzing and processing from the storer of pre-process circuit by serial ports of computers.Reprocessing analysis software is the integration within detection time according to force value, discloses qualitatively in the foil gauge matrix described in the detection time of inherence in each corresponding region, strain unit mean kinetic energy, dense degree and the hydraulic pressure of the abrasive particle while bumping with described internal face.The force value in the region that in foil gauge matrix, each strain unit is corresponding is carried out to integration, obtain the coefficient pressure distribution of mean kinetic energy, dense degree and hydraulic pressure of diverse location abrasive particle collision internal face in foil gauge matrix, last handling process is using the pressure average in each region of having carried out grid division in described fluent numerical simulation as the pressure signal base value at this place, elimination from the pressure signal of correspondence position, finally obtain abrasive particle in solid-liquid two-phase flow and at diverse location, collide the pressure distribution of wall, and be presented on computer screen by the form of cloud atlas.
Beneficial effect of the present invention is: simple in structure, simple operation; Cannot naked-eye observation abrasive particle collision wall in the situation that, can abrasive particle in actual process be distributed and be tested in different wall collision probabilities, accurately judge the processing effect of abrasive particle in solid-liquid two-phase flow, for research solid-liquid two-phase flow carries out providing experimental basis without instrument Precision Machining, for further analyzing abrasive particle in solid-liquid two-phase flow, the processing effect of different walls is laid the foundation.
Accompanying drawing explanation
Fig. 1 is the parts pie graph of apparatus of the present invention.
Fig. 2 is the one-piece construction schematic diagram of apparatus of the present invention.
Fig. 3 is the runner internal strain sheet matrix installation site schematic diagram of apparatus of the present invention.
Fig. 4 is the foil gauge matrix structure schematic diagram of apparatus of the present invention.
Fig. 5 is apparatus of the present invention pre-process circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1～Fig. 5, in a kind of solid-liquid two-phase flow, abrasive particle is in probability distribution proving installation and the method for diverse location collision wall, comprise the solid-liquid two-phase flow circulation system 1, pressure transducer 2 and Computer reprocessing system 3, the described solid-liquid two-phase flow circulation system 1 comprises submersible pump 11, abrasive material case 12, stirrer 15, inlet hose 14, outlet hose 17, constraint runner 18 and the run-down pipe 16 with patterned surface, described pressure transducer 2 comprises foil gauge matrix 21 and pre-process circuit 22, the lower surface that described foil gauge matrix 21 is sealing adhesive at sheet metal 212 by a series of foil gauges 211 forms, and be affixed on the wall of the constraint runner 18 with patterned surface, described pre-process circuit comprises Huygens's electric bridge, amplifier, A/D converter, storer and processor, described Computer reprocessing system 3 comprises the computing machine 31 with storage calculation function and the analysis software with post-processing function.
In described abrasive particle case, place submersible pump 11, described submersible pump 11 is connected with constraint runner 18 entrances with patterned surface by described inlet hose 14, have 18 outlets of patterned surface constraint runner and be connected with described outlet hose 17, described outlet hose 17 is connected with described abrasive material case 12.
In described abrasive particle case 12, be equipped with stirrer 15, described stirrer 15 guarantees that solid-liquid two-phase flow abrasive particle is evenly distributed, and described abrasive material case 12 lower side are provided with the run-down pipe 16 that prevents that soft abrasive fluid from overflowing.
It is described that to have patterned surface constraint runner 18 cross section import large outlets little, the described constraint runner 18 with patterned surface is placed on laboratory bench, described constraint runner 18 left and right sides with patterned surface connect respectively inlet hose 14 and outlet hose 17, described inlet hose 14 be communicated with described submersible pump 11 and described in there is the constraint runner 18 of patterned surface, described in described outlet hose 17 is communicated with, there is constraint runner 18 and the described abrasive material case 12 of patterned surface.
Described foil gauge matrix 21 can be converted into abrasive particle in solid-liquid two-phase flow the variation of resistance at the pressure of diverse location collision wall, described Huygens's electric bridge is converted into the resistance variations of described foil gauge matrix the variation of voltage, and change into digital signal through described amplifier and A/D converter, be stored in described storer.
Described reprocessing analysis software 3 reads digital signal and carries out analyzing and processing from described storer by described serial ports of computers, last handling process is using the pressure average in each region of having carried out grid division in described fluent numerical simulation as the pressure signal base value at this place, elimination in the pressure signal obtaining from storer, finally obtains abrasive particle in solid-liquid two-phase flow and at diverse location, collides the pressure distribution of wall.
The proving installation of the present embodiment is comprised of the solid-liquid two-phase flow circulation system 1, pressure transducer 2 and Computer reprocessing system 3 three parts.In the solid-liquid two-phase flow circulation system 1, the constraint runner 18 with patterned surface squeezed into the solid-liquid two-phase flow that contains abrasive particle by submersible pump 11 by entrance flexible pipe, forms turbulent flow.Abrasive particle is under the driving effect of turbulent flow, with the sheet metal 212 upper surface generation different angles frequent impact effects that stick at the foil gauge matrix 21 of patterned surface, sheet metal 212 is deformed under abrasive particle effect of impact, foil gauge 211 is converted into the strain of sheet metal 212 diverse locations the variation of resistance, pre-process circuit 22 changes voltage signal into foil gauge 211 resistance signals, through memory stores.And the voltage signal of storing in storer comprises that sheet metal 212 is subject to the deformation of abrasive particle collision wall and the deformation that hydraulic pressure causes, the deformation voltage signal of removing water flow pressure effect is only us and tests needed.Wherein, the pressure that abrasive particle acts on internal face is produced by collision.The collision time of abrasive particle and internal face is extremely of short duration.The acting force that it imposes on internal face is discontinuous, but a large amount of abrasive particle collides wall continually, from macroscopic view, can think that abrasive particle is that continue, uniform to the acting force of internal face.From single abrasive particle angle, the quality of abrasive particle is larger, speed is larger, the mean kinetic energy that is abrasive particle is larger, it is larger to the acting force of internal face that each abrasive particle hits an internal face, and the number of times of abrasive particle shock wall is more in the unit interval, also larger to the general pressure of wall, and clash into number of times, depend on abrasive particle number (dense degree of abrasive particle) and mean kinetic energy in unit volume.So abrasive particle acts on mean kinetic energy and dense degree that the pressure of internal face is decided by abrasive particle.On this basis, reprocessing analysis software reads digital signal and carries out analyzing and processing from the storer of pre-process circuit 22 by serial ports of computers.Reprocessing analysis software is the integration within detection time according to force value, discloses qualitatively in the foil gauge matrix 21 described in the detection time of inherence in each corresponding region, strain unit mean kinetic energy, dense degree and the hydraulic pressure of the abrasive particle while bumping with described internal face.Force value to the region that in foil gauge matrix 21, each strain unit is corresponding is carried out integration, obtain the mean kinetic energy of diverse location abrasive particle collision internal face in foil gauge matrix, the coefficient pressure distribution of dense degree and hydraulic pressure, last handling process is using the pressure average in each region of having carried out grid division in described fluent numerical simulation as the pressure signal base value at this place, elimination from the pressure signal of correspondence position, finally obtain abrasive particle in solid-liquid two-phase flow and at diverse location, collide the pressure distribution of wall, and be presented on computer screen by the form of cloud atlas.
Content described in this instructions embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention is also and in those skilled in the art, according to the present invention, conceive the equivalent technologies means that can expect.
Claims (3)
1. in solid-liquid two-phase flow, abrasive particle, at a probability distribution proving installation for diverse location collision wall, is characterized in that: described probability distribution proving installation comprises the solid-liquid two-phase flow circulation system, pressure transducer and Computer reprocessing system;
The described solid-liquid two-phase flow circulation system comprises submersible pump, abrasive particle case, stirrer, inlet hose, outlet hose, has the constraint runner of patterned surface and prevent the run-down pipe that soft abrasive fluid overflows; In described abrasive particle case, place submersible pump, described submersible pump is connected with the described constraint runner import with patterned surface by described inlet hose, the described constraint runner exit with patterned surface is connected with described outlet hose, described outlet hose is connected with described abrasive particle case, in described abrasive particle case, be equipped with stirrer, described abrasive particle lower box part side is provided with described run-down pipe;
Described pressure transducer comprises foil gauge matrix and pre-process circuit, the lower surface that described foil gauge matrix is sealing adhesive at sheet metal by a series of foil gauges forms, and be affixed on the wall of the constraint runner with patterned surface, utilize fluent numerical simulation to obtain the pressure distribution in runner, and distribute and carry out region division according to pressure gradient, described foil gauge matrix is pasted according to pressure zoning;
Described Computer reprocessing system comprises probability distribution test module, in order to read digital signal by serial ports of computers and carry out analyzing and processing from described pre-process circuit, using the pressure average in each region of carrying out region division in fluent numerical simulation as the pressure signal base value in this region, elimination in the pressure signal obtaining from described pre-process circuit again, finally obtains abrasive particle in solid-liquid two-phase flow and at diverse location, collides the pressure distribution of wall.
2. in solid-liquid two-phase flow as claimed in claim 1, abrasive particle collides the probability distribution proving installation of wall at diverse location, it is characterized in that: described in to have the constraint cross section of fluid channel import large outlet of patterned surface little, the described constraint runner with patterned surface is placed on laboratory bench, the described constraint runner left and right sides with patterned surface connects respectively inlet hose and outlet hose, described inlet hose be communicated with described submersible pump and described in there is the constraint runner of patterned surface, constraint runner and the described abrasive particle case described in described outlet hose is communicated with patterned surface.
3. in solid-liquid two-phase flow as claimed in claim 1 or 2, abrasive particle collides the probability distribution proving installation of wall at diverse location, it is characterized in that: described pre-process circuit comprises Huygens's electric bridge, amplifier, A/D converter, storer and processor, described foil gauge matrix can be converted into abrasive particle in solid-liquid two-phase flow the variation of resistance at the pressure of diverse location collision wall, described Huygens's electric bridge is converted into the resistance variations of described foil gauge matrix the variation of voltage, and change into digital signal through described amplifier and A/D converter, be stored in described storer.
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| CN201210100406.8A CN102621045B (en) | 2012-04-06 | 2012-04-06 | Probability distribution test device for collision by abrasive particles in solid and liquid two-phase flow on wall surface at different positions |
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| CN201210100406.8A CN102621045B (en) | 2012-04-06 | 2012-04-06 | Probability distribution test device for collision by abrasive particles in solid and liquid two-phase flow on wall surface at different positions |
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| CN111426611B (en) * | 2020-03-12 | 2021-09-21 | 北京理工大学 | Rotational flow abrasion particle detection sensor and dispersion effect analysis method thereof |
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| CN101791787A (en) * | 2010-03-11 | 2010-08-04 | 浙江工业大学 | Automatic stirring system for soft abrasive particle fluids |
| CN101984340A (en) * | 2010-10-28 | 2011-03-09 | 浙江工业大学 | Method for identifying flow type of soft grain two-phase turbulence based on artificial intelligence |
| CN102183522A (en) * | 2011-03-04 | 2011-09-14 | 浙江工业大学 | Device for observing distribution of flexible abrasive flow and wear particle groups |
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Patent Citations (3)
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|---|---|---|---|---|
| CN101791787A (en) * | 2010-03-11 | 2010-08-04 | 浙江工业大学 | Automatic stirring system for soft abrasive particle fluids |
| CN101984340A (en) * | 2010-10-28 | 2011-03-09 | 浙江工业大学 | Method for identifying flow type of soft grain two-phase turbulence based on artificial intelligence |
| CN102183522A (en) * | 2011-03-04 | 2011-09-14 | 浙江工业大学 | Device for observing distribution of flexible abrasive flow and wear particle groups |
Non-Patent Citations (2)
| Title |
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| 结构化流道环境下不同颗粒浓度的磨粒群分布及其动力学特性;计时鸣等;《农业工程学报》;20120229;第28卷(第4期);全文 * |
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Effective date of registration: 20191224 Address after: 314400 No.2, Fengshou Avenue, Haining warp knitting industrial park, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Haining Warp Knitting Industrial Park Development Co.,Ltd. Address before: 510000 unit 2414-2416, building, No. five, No. 371, Tianhe District, Guangdong, China Patentee before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20191224 Address after: 510000 unit 2414-2416, building, No. five, No. 371, Tianhe District, Guangdong, China Patentee after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee before: Zhejiang University of Technology |
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