CN205580907U - A test bench for measuring material cavitation resistance ability - Google Patents
A test bench for measuring material cavitation resistance ability Download PDFInfo
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- CN205580907U CN205580907U CN201620093395.9U CN201620093395U CN205580907U CN 205580907 U CN205580907 U CN 205580907U CN 201620093395 U CN201620093395 U CN 201620093395U CN 205580907 U CN205580907 U CN 205580907U
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Abstract
The utility model provides a measure the anti cavitation erosion performance test bench of material, including pressure vessel jar, centrifugal pump, surge tank and cavitation corrosion generating device, constitute circulation circuit through the tube coupling between pressure vessel jar, centrifugal pump, surge tank, the cavitation corrosion generating device, the input of connection pressure changer, pressure transmitter and electric -magnetic flow meter's output passing signal line connection pump TPA tester is distinguished to the piezometer orifice of establishing on the pipeline, the output and the computer link of pump TPA tester, cavitation corrosion generating device includes front panel and the rear panel of connecting each other, and the center of front panel is equipped with the convergent hole, the rear panel is opened corresponding to the middle symmetry of front panel one side has two rectangular channels, the pipeline of being connected with the front panel is the reducing pipe, and the front panel is connected to the one end that the diameter is little, and the surge tank is connected to the one end that the diameter is big. The utility model discloses utilize orifice plate efflux principle test material the cavitation resistance can, processing ease, measurement accuracy are higher.
Description
Technical field
This utility model belongs to fluid machinery experiment field, especially relates to a kind of testing stand for measuring material cavitation resistive property.
Background technology
Cavitation corrosion also referred to as cavitation erosion, refers to, when liquid is less than its saturated vapour pressure at the pressure with surface of solids contact position, to be formed about bubble at the surface of solids.It is likely to separate out and form bubble it addition, dissolve gas in a liquid.Subsequently, when bubbly flow to fluid pressure exceed pressure in bubbles local time, bubble is just crumbled and fall, at the great impulsive force of instantaneous generation and the high temperature of crumbling and fall.The surface of solids stands the repeatedly repeated action of this impulsive force, and material generation fatigue comes off, and makes surface small rut occur, and then develops into spongy.The serious pit that in fact can form sheet on surface, even bores a hole.The degree of cavitation corrosion is weighed with cavitation corrosion intensity.In the cavitation corrosion intensity conventional unit time, the loss of weight of material, volume reduction, perforation number and surface roughness change as characteristic quantity.Cavitation and cavitation erosion is one of two peculiar fluid mechanics problems of turbomachinery such as the pump with liquid as medium, the hydraulic turbine, pump turbine and propeller.In order to ensure the normal operation of hydraulic, need cavitation and cavitation corrosion are taked safeguard procedures, in addition to improving the cavitation performance of hydraulic itself, also need to the anti-cavitation Cavitation of material is studied, i.e. to select the material that anti-Cavitation is good as far as possible, especially blade and other subject to the parts of cavitation erosion, the material selecting anti-Cavitation good is critically important and effectively protect the measure that cavitation corrosion corrodes.Having in prior art and utilize supersonic gas erosion experimental machine directly to produce cavitation erosion to test the cavitation resistive property of material at material surface, but its existence involves great expense, and the deficiency that the suitability is poor.
Utility model content
For Shortcomings in prior art, this utility model provides a kind of testing stand for measuring material cavitation resistive property, utilizes the cavitation resistive property of orifice plate jet current principle test material, and processing ease, certainty of measurement are higher.
This utility model realizes above-mentioned technical purpose by techniques below means.
A kind of measurement material cavitation resistive property testing stand, including pressure volume pot, centrifugal pump, vacuum tank and cavitation corrosion generating means；The outlet pipeline of described pressure volume pot connects the water inlet of centrifugal pump by the first pipeline；The outlet of described centrifugal pump connects the water inlet of vacuum tank by the second pipeline；The outlet of described vacuum tank connects the water inlet of cavitation corrosion generating means by the 3rd pipeline, and the outlet of described cavitation corrosion generating means connects the 5th pipeline by the 4th pipeline；Described 5th pipeline connects the inlet pipeline of pressure volume pot；It is provided with inlet control valve between described outlet pipeline and the first pipeline, between described 5th pipeline and inlet pipeline, is provided with outlet regulating valve；Described 5th pipeline is provided with electromagnetic flowmeter；The pressure tap of described first pipeline, the second pipeline and the 3rd pipeline connects the input of 3 pressure transmitters respectively, and the outfan of described pressure transmitter and electromagnetic flowmeter connects pump TPA tester by holding wire；The outfan of described pump TPA tester is connected with computer；Described pressure volume pot is also associated with vacuum pump, and pressure volume pot is provided with vacuum meter；Described centrifugal pump connects motor inverter；
Described cavitation corrosion generating means includes front panel and the rear board being connected to each other, and the center of described front panel is provided with tapered hole；Described rear board has two rectangular channels corresponding to the intermediate symmetry of front panel one side；Described 3rd pipeline is reducing pipe, and one end that diameter is little connects front panel, and one end that diameter is big connects vacuum tank.
Further, described front panel and rear board are circular poly (methyl methacrylate) plate, are provided with annular rubber pad between described front panel and rear board.
Further, described front panel and rear board are bolted；It is evenly equipped with 4 outlets on described rear board, connects the entrance point of the 5th pipeline through 4 the 4th pipelines by five-way valve respectively.
Further, described 5th pipeline is increaser, and one end that diameter is little connects the outlet of the 4th pipeline, and one end that diameter is big connects inlet pipeline.
Further, described pressure volume pot and vacuum tank are stainless steel；Described pressure volume pot includes tubular tank body, cover, cover suspension ring, supply line, liquidometer, spike and discharge pipe line；Described tubular tank body top is provided with cover, and described cover top is provided with pressure port, and pressure port top is provided with the boss of Intermediate Gray screwed hole through hole；Described cover is provided with supply line and vacuum-pumping pipeline；Described tubular tank base is provided with spike and discharge pipe line；Described tubular tank body side is provided with liquidometer.
Further, described tubular tank body can body be cylindrical shape, bottom be spherical shell shape, the wall thickness of tubular tank body is 5mm, and negative pressure is-0.1Mpa to the maximum；3 spikes are uniform is welded on tubular tank base.
Further, the vacuum-pumping pipeline of described pressure volume pot is connected with the pump intake of vacuum pump by PVC wired hose；Described vacuum-pumping pipeline is provided with evacuation quick opening valve.
Further, described centrifugal pump is NISO50-32-200 type centrifugal pump of single stage type；Described electromagnetic flowmeter model is DKS-LDE Intelligent integrated formula electromagnetic flowmeter；The model of described vacuum meter is YZ-100BF type；Described vacuum pump is XD type rotary-vane vaccum pump, and the speed of exhaust is 40m3/h, end vacuum 200Pa.
The beneficial effects of the utility model:
A kind of testing stand for measuring material cavitation resistive property described in the utility model, orifice plate jet current principle is utilized to prepare cavitation corrosion generating means, and it is connected and composed closed circuit with pressure volume pot, centrifugal pump and vacuum tank by pipeline, and then realize the test of material cavitation resistive property；By this testing stand, the anti-cavitation performance measured is tested, compared with existing vibratory cavitation method, more closing to reality, the hydraulic internal cavitation and cavitation erosion the occurred destruction to material surface under different cavitation number σ can be reflected really, the cavitation test of different materials can be carried out, the anti-Cavitation test of contrast different materials simultaneously；This test platform structure is simple, easy for installation, applied widely, processing ease, precision are higher.
Accompanying drawing explanation
Fig. 1 is that this utility model is for measuring the structural representation of the testing stand of material cavitation resistive property.
Fig. 2 is the structural representation of cavitation corrosion generating means.
Description of reference numerals is as follows:
null1-pressure volume pot，2-centrifugal pump，3-vacuum tank，4-cavitation corrosion generating means，5-the first pipeline，6-the second pipeline，7-the 3rd pipeline，8-the 4th pipeline，9-the 5th pipeline，10-pump TPA tester，11-vacuum pump，12-motor inverter，1-1-tubular tank body，1-2-cover，1-3-cover suspension ring，1-4-inlet pipeline，1-5-supply line，1-6-liquidometer，1-7-spike，1-8-discharge pipe line，1-9-outlet pipeline，4-1-front panel，4-2-rear board，4-3-annular rubber pad，4-4-rectangular channel，The tapered hole of 4-5-，5-1-inlet control valve，5-2-pressure transmitter，9-1-outlet regulating valve，9-2-electromagnetic flowmeter，11-1-evacuation quick opening valve.
Detailed description of the invention
Below in conjunction with the accompanying drawings and this utility model is further described by specific embodiment, but protection domain of the present utility model is not limited to this.
Material anti-Cavitation testing stand is measured, including pressure volume pot 1, centrifugal pump 2, vacuum tank 3 and cavitation corrosion generating means 4 as it is shown in figure 1, a kind of；Pressure volume pot 1 and vacuum tank 3 are stainless steel；Described pressure volume pot 1 includes tubular tank body 1-1, cover 1-2, cover suspension ring 1-3, inlet pipeline 1-4, supply line 1-5, liquidometer 1-6, spike 1-7, discharge pipe line 1-8 and outlet pipeline 1-9；The can body of described tubular tank body 1-1 be cylindrical shape, bottom be spherical shell shape, two parts weld together；The wall thickness of tubular tank body 1-1 is with reference to GB150-2011 " pressure vessel ", negative pressure is-0.1MPa to the maximum, it is 3mm that container wall thickness does not comprise corrosion allowance, under the normal experiment condition of this container, medium is water, therefore determine that corrosion allowance is 1mm, simultaneously take account of welding and structure design, determine that final tank body wall thickness is 5mm；Tubular tank body 1-1 top is provided with cover 1-2, described cover 1-2 top is provided with pressure port, diameter d=2～6mm, and pressure port top is provided with the boss of Intermediate Gray screwed hole through hole, when needs lift, can be loaded in screwed hole by the shank of bolt of cover suspension ring 1-3 bottom and lift；When needs measuring pressure container tank 1 pressure, can install vacuum meter in the screwed hole of boss, vacuum meter model can be YZ-100BF type.
The both sides of described cover 1-2 further respectively have supply line 1-5 and vacuum-pumping pipeline, and vacuum-pumping pipeline is connected with vacuum pump 11 by PVC wired hose；Seam metal clip is tightened and is prevented gas leakage, and vacuum pump 11 need to be fixed on the ground by foundation bolt, and vacuum pump 11 is XD type rotary-vane vaccum pump, and the speed of exhaust is 40m3/ h, end vacuum 200Pa；Supply line 1-5 is mainly by by external water source injection pressure container tank 1；The one side of tubular tank body 1-1 is vertically provided with liquidometer 1-6, and its range need to be more than the maximum height of pressure volume pot 1 liquid storage.The top, another side of tubular tank body 1-1 is provided with inlet pipeline 1-4, and bottom is provided with outlet pipeline 1-9.The bottom welding of tubular tank body 1-1 has the spike 1-7 of uniform 3 stainless steel material, and thickness of steel product is 8mm.
The outlet pipeline 1-9 of described pressure volume pot 1 connects the water inlet of centrifugal pump 2 by the first pipeline 5；The outlet of described centrifugal pump 2 connects the water inlet of vacuum tank 3 by the second pipeline 6；Centrifugal pump 2 is NISO50-32-200 type centrifugal pump of single stage type；The outlet of described vacuum tank 3 connects the water inlet of cavitation corrosion generating means 4 by the 3rd pipeline 7, and the outlet of described cavitation corrosion generating means 4 connects the 5th pipeline 9 by the 4th pipeline 8；Described 5th pipeline 9 connects the inlet pipeline 1-4 of pressure volume pot 1；It is provided with inlet control valve 5-1 between described outlet pipeline 1-9 and the first pipeline 5, between described 5th pipeline 9 and inlet pipeline 1-4, is provided with outlet regulating valve 9-1；It is DKS-LDE Intelligent integrated formula electromagnetic flowmeter that described 5th pipeline 9 is provided with electromagnetic flowmeter 9-2, electromagnetic flowmeter 9-2；The pressure tap of described first pipeline the 5, second pipeline 6 and the 3rd pipeline 7 connects the input of 3 pressure transmitters respectively, junction thin wire tightens guarantee air-tightness, the outfan of described pressure transmitter is connected with pump TPA tester by holding wire, and pressure signal is changed into the signal of telecommunication；The outfan of described pump TPA tester 10 is connected with computer；Described centrifugal pump 2 is also associated with motor inverter 12, and the outfan of described electromagnetic flowmeter 9-2 connects pump TPA tester 10 by holding wire, and flow information is transferred to pump TPA tester 10；Pump TPA tester 10, with digital display function, can directly read pressure with the value of flow.
As shown in Figure 2, described cavitation corrosion generating means 4 includes the most threaded front panel 4-1 and rear board 4-2, front panel 4-1 and rear board 4-2 is circular poly (methyl methacrylate) plate, being provided with annular rubber pad 4-3 between described front panel 4-1 and rear board 4-2, the center of described front panel 4-1 is provided with tapered hole 4-5；Described rear board 4-2 has two rectangular channel 4-4 corresponding to the intermediate symmetry of front panel 4-1 one side, spacing is front panel 4-1 center-hole diameter between the two, a size of 38mm*16mm*4mm, it is used for placing test material sample block, can place identical material sample or the sample of different materials according to experiment demand in two rectangular channel 4-4, test material needs to be processed into the standard sample of a size of 38mm*16mm*4mm；Described 3rd pipeline 7 is reducing pipe, and one end that diameter is little connects the tapered hole of front panel 4-1, and one end that diameter is big connects vacuum tank 3；4 outlets it are evenly equipped with on described rear board 4-2, the entrance point of the 5th pipeline 9 is connected by five-way valve respectively through 4 the 4th pipelines 8 (i.e. metal hose section), described 5th pipeline 9 is increaser, one end that diameter is little connects the outlet of the 4th pipeline 8, and one end that diameter is big connects inlet pipeline 1-4.
Work process:
First clean tested material sample block before test, be placed in blowing-type drying baker, at 105 DEG C, dry after 1h and be cooled to room temperature, take out sample block and be placed in electronic analytical balance and weigh and record, after weighing, test specimen is taken pictures.Check the wiring of each instrument and sensor, it is placed on being test for material in the rectangular channel 4-4 of cavitation erosion generating means rear board 4-2, by inlet control valve 5-1 standard-sized sheet, close outlet regulating valve 9-1, regulation motor inverter 12 makes frequency be 50HZ, the rotating speed guaranteeing centrifugal pump 2 is rated speed, slowly opening outlet regulating valve 9-1 makes flow reach required value until there is the cavitation of ideal range at the center hole of cavitation erosion generating means front panel 4-1, reads and record each pressure transmitter and the numerical value of electromagnetic flowmeter 9-2；Diameter according to cavitation erosion generating means front panel 4-1 center hole calculates flow velocity, according to cavitation number formula
In formula, p∞And V∞It is respectively incoming-flow pressure and the flow velocity of liquid；ρ is fluid density；PvFor liquid saturated vapour pressure at ambient temperature.By above-mentioned surveyed data in people's formula can in the hope of cavitation number σ now；Persistently close power supply after cavitation erosion 30min, pull down cavitation erosion generating means and take out test material, rinse well with flowing clear water, need to wear rubber gloves, after rinsing well the when of it should be noted that and test material is operated, it is placed in blowing-type drying baker, dry after 1h and be cooled to room temperature at 105 DEG C, take out sample block and be placed in electronic analytical balance and weigh and record, after weighing, test specimen is taken pictures.
Under same operating mode, again test specimen sample block is placed in the anti-generating apparatus of cavitation erosion the 30min that persistently cavitates, again repeat after having cavitated above-mentioned cleaning, dry, weigh, step of taking pictures.Repeating the step that cavitates, each 30min, the cavitation erosion of same sample should be 4～5h total time.Draw cavitation corrosion amount and eroding rate curve, the cavitation resistive property of contrast different materials, regulation outlet control valve 9-1 and unlatching vacuum pump 11 according to the data weighed every time and can change cavitation number, test specimen cavitation resistive property under different cavitation numbers can be obtained.
Described embodiment be of the present utility model preferred embodiment; but this utility model is not limited to above-mentioned embodiment; in the case of without departing substantially from flesh and blood of the present utility model, any conspicuously improved, replacement or modification that those skilled in the art can make belong to protection domain of the present utility model.
Claims (8)
1. the testing stand being used for measuring material cavitation resistive property, it is characterised in that include pressure volume pot (1), centrifugal pump (2), vacuum tank (3) and cavitation corrosion generating means (4)；The outlet pipeline (1-9) of described pressure volume pot (1) connects the water inlet of centrifugal pump (2) by the first pipeline (5)；The outlet of described centrifugal pump (2) connects the water inlet of vacuum tank (3) by the second pipeline (6)；The outlet of described vacuum tank (3) connects the water inlet of cavitation corrosion generating means (4) by the 3rd pipeline (7), and the outlet of described cavitation corrosion generating means (4) connects the 5th pipeline (9) by the 4th pipeline (8)；Described 5th pipeline (9) connects the inlet pipeline (1-4) of pressure volume pot (1)；It is provided with inlet control valve (5-1) between described outlet pipeline (1-9) and the first pipeline (5), between described 5th pipeline (9) and inlet pipeline (1-4), is provided with outlet regulating valve (9-1)；Described 5th pipeline (9) is provided with electromagnetic flowmeter (9-2)；The pressure tap of described first pipeline (5), the second pipeline (6) and the 3rd pipeline (7) connects the input of 3 pressure transmitters (502) respectively, and the outfan of described pressure transmitter (502) and electromagnetic flowmeter (9-2) connects pump TPA tester (10) by holding wire；The outfan of described pump TPA tester (10) is connected with computer；Described pressure volume pot (1) is also associated with vacuum pump (11), and pressure volume pot (1) is provided with vacuum meter；Described centrifugal pump (2) connects motor inverter (12)；
Described cavitation corrosion generating means (4) includes front panel (4-1) and the rear board (4-2) being connected to each other, and the center of described front panel (4-1) is provided with tapered hole (4-5)；Described rear board (4-2) has two rectangular channels (4-4) corresponding to the intermediate symmetry of front panel (4-1) one side；Described 3rd pipeline (7) is reducing pipe, and one end that diameter is little connects front panel (4-1), and one end that diameter is big connects vacuum tank (3).
A kind of testing stand for measuring material cavitation resistive property the most according to claim 1, it is characterized in that, described front panel (4-1) and rear board (4-2) are circular poly (methyl methacrylate) plate, are provided with annular rubber pad (4-3) between described front panel (4-1) and rear board (4-2).
A kind of testing stand for measuring material cavitation resistive property the most according to claim 2, it is characterised in that described front panel (4-1) and rear board (4-2) are bolted；It is evenly equipped with 4 outlets on described rear board (4-2), connects the entrance point of the 5th pipeline (9) through 4 the 4th pipelines (8) by five-way valve respectively.
A kind of testing stand for measuring material cavitation resistive property the most according to claim 3, it is characterized in that, described 5th pipeline (9) is increaser, and one end that diameter is little connects the outlet of the 4th pipeline (8), and one end that diameter is big connects inlet pipeline (1-4).
A kind of testing stand for measuring material cavitation resistive property the most according to claim 1, it is characterised in that described pressure volume pot (1) and vacuum tank (3) are stainless steel；Described pressure volume pot (1) includes tubular tank body (1-1), cover (1-2), cover suspension ring (1-3), supply line (1-5), liquidometer (1-6), spike (1-7) and discharge pipe line (1-8)；Described tubular tank body (1-1) top is provided with cover (1-2), and described cover (1-2) top is provided with pressure port, and pressure port top is provided with the boss of Intermediate Gray screwed hole through hole；Described cover (1-2) is provided with supply line (1-5) and vacuum-pumping pipeline；Described tubular tank body (1-1) bottom is provided with spike (1-7) and discharge pipe line (1-8)；Described tubular tank body (1-1) side is provided with liquidometer (1-6).
A kind of testing stand for measuring material cavitation resistive property the most according to claim 5, it is characterized in that, described tubular tank body (1-1) can body be cylindrical shape, bottom be spherical shell shape, the wall thickness of tubular tank body (1-1) is 5mm, and negative pressure is-0.1Mpa to the maximum；3 spikes (1-7) are uniform is welded on tubular tank body (1-1) bottom.
A kind of testing stand for measuring material cavitation resistive property the most according to claim 5, it is characterised in that the vacuum-pumping pipeline of described pressure volume pot (1) is connected with the pump intake of vacuum pump (11) by PVC wired hose；Described vacuum-pumping pipeline is provided with evacuation quick opening valve (11-1).
A kind of testing stand for measuring material cavitation resistive property the most according to claim 1, it is characterised in that described centrifugal pump (2) is NISO50-32-200 type centrifugal pump of single stage type；Described electromagnetic flowmeter (9-2) model is DKS-LDE Intelligent integrated formula electromagnetic flowmeter；The model of described vacuum meter is YZ-100BF type；Described vacuum pump (11) is XD type rotary-vane vaccum pump, and the speed of exhaust is 40m3/ h, end vacuum 200Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620093395.9U CN205580907U (en) | 2016-01-29 | 2016-01-29 | A test bench for measuring material cavitation resistance ability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620093395.9U CN205580907U (en) | 2016-01-29 | 2016-01-29 | A test bench for measuring material cavitation resistance ability |
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| Publication Number | Publication Date |
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| CN205580907U true CN205580907U (en) | 2016-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620093395.9U Expired - Fee Related CN205580907U (en) | 2016-01-29 | 2016-01-29 | A test bench for measuring material cavitation resistance ability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547888A (en) * | 2016-01-29 | 2016-05-04 | 江苏大学 | Test stand for measuring anti-cavitation performance of material |
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2016
- 2016-01-29 CN CN201620093395.9U patent/CN205580907U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547888A (en) * | 2016-01-29 | 2016-05-04 | 江苏大学 | Test stand for measuring anti-cavitation performance of material |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 Termination date: 20190129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |