CN106020277B - Low temperature friction wear testing machine operating temperature control method and casing - Google Patents

Low temperature friction wear testing machine operating temperature control method and casing Download PDF

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Publication number
CN106020277B
CN106020277B CN201610341000.7A CN201610341000A CN106020277B CN 106020277 B CN106020277 B CN 106020277B CN 201610341000 A CN201610341000 A CN 201610341000A CN 106020277 B CN106020277 B CN 106020277B
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low temperature
temperature
casing
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CN201610341000.7A
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CN106020277A (en
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卢文壮
刘巍
刘志刚
孙玉利
潘天宇
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南京航空航天大学
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/20Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/56Investigating resistance to wear or abrasion

Abstract

A kind of low temperature friction wear testing machine operating temperature control method and casing, it is characterized in that:First, the air in the low temperature casing for installing low temperature friction wear testing machine is discharged using air exhauster, while moisture free nitrogen is passed through into low temperature casing so that atmosphere in low temperature casing not containing water vapor;Secondly, into low temperature casing, liquid enters liquid nitrogen, the temperature in low temperature casing is rapidly dropped to the operating temperature needed for low temperature friction wear testing machine;3rd, cold air inlet is set on the low temperature casing above low temperature friction wear testing machine, the side of cold air inlet sets air outlet, is sent into cold wind into cryogenic box body by the cold air inlet, makes being maintained in the operating temperature range of setting in cryogenic box body;4th, the valve control vector cold wind nozzle for adjusting area of localized hyperthermia is installed in low temperature body side;5th, thermal infrared imager progress temperature control is installed on low temperature casing.The inventive method is simple in construction, and manufacture is easy to control, and experimental cost is low, and effect is good.

Description

Low temperature friction wear testing machine operating temperature control method and casing

Technical field

The present invention provides a kind of low temperature processing techniques, and low temperature environment realizes technology in especially a kind of low temperature process, specifically It is a kind of low temperature friction wear testing machine operating temperature control method and casing that ground, which is said,.

Background technology

Friction wear testing machine is a kind of machine for being used to determine material friction and wear behavior under certain environmental conditions, its General principle is:Under load effect, sample to be ground phase mutual friction under defined speed with friction piece, pass through computer software The friction and wear characteristic of system measurement sample to be ground.In aerospace industry, the environment of material friction abrasion is substantially in height Under conditions of pressure, low temperature or even vacuum, therefore it is the premise for carrying out low temperature frictional wear experiment to create similar low temperature environment, So as to be evaluated and tested to friction and wear characteristics such as its wearabilities, this is significant to Aero-Space development.At present, greatly Partial friction wear testing machine designs both for high temperature experiment condition, and this method is different from conventional high-temperature control, Stable low temperature control can be realized.

Environment temperature is as a principal element for influenceing friction and wear behavior, it is necessary to the control stablized to it, side Other influences factor can be studied.Therefore, a stable high and low temperature environment is createed, friction and wear property is ground Study carefully significant.Instantly the low temperature control method of main flow is to place low-temperature receiver in fretting wear region, or testing machine is put into system Ice chest body is medium.

In the method that low-temperature receiver is placed in fretting wear area, its refrigerating speed is fast, but the stability of overall low temperature environment is poor, by Heat has a great influence produced by friction, so being not available for prolonged frictional wear experiment;Testing machine is put in refrigeration cabinets Method, the stability of its low temperature environment is strong, but refrigeration cabinets are time-consuming longer, can not quickly carry out frictional wear experiment.

Force snesor normal work is conditional, it will usually has an operating temperature range.And rubbed currently used for measurement The low temperature friction wear testing machine for wiping power mainly purchases corresponding force snesor according to the cryogenic conditions of requirement of experiment, this Although method consumption cost, taking, it can ensure that force snesor being capable of normal work.

Temperature in space industry, space can be as little as subzero more than 100 degrees Celsius, if desired carries out this kind of extremely low temperature Frictional wear experiment under degree, the requirement to sensor is at a relatively high.When the temperature of experimental simulation is extremely low, and in the market When can not buy the sensor for meeting the temperature conditionss, experiment is just difficult to, and which greatly limits what the outer space was explored to enter Exhibition.

The content of the invention

The purpose of the present invention is the operating ambient temperature poor controllability for existing friction wear testing machine, it is impossible to is realized Isothermal experiments and the problem of influence experimental result accuracy, invent a kind of low temperature friction wear testing machine operating temperature controlling party Method, while a kind of low temperature test casing of matching is provided.

One of technical scheme is:

A kind of low temperature friction wear testing machine operating temperature control method, it is characterized in that:

First, the air in the low temperature casing for installing low temperature friction wear testing machine is discharged using air exhauster, while to Moisture free nitrogen is passed through in low temperature casing so that atmosphere in low temperature casing not containing water vapor;

Secondly, into low temperature casing, liquid enters liquid nitrogen, the temperature in low temperature casing is rapidly dropped to low temperature fretting wear examination Test the operating temperature needed for machine;

3rd, cold air inlet, cold wind air intake are set on the low temperature casing above low temperature friction wear testing machine The side of mouth sets air outlet, is sent into cold wind into cryogenic box body by the cold air inlet, makes being maintained in cryogenic box body In the operating temperature range of setting;

4th, the valve control vector cold wind nozzle for adjusting area of localized hyperthermia is installed in low temperature body side;

5th, thermal infrared imager is installed on low temperature casing, the signal input temp control system of thermal infrared imager collection, When the test block temperature of thermal infrared imager monitoring drops to temperature needed for experiment, it is cold that temperature control system reduces cold air inlet The feeding amount of wind, when test block temperature is higher than experimental temperature, temperature control system increases the feeding amount of cold wind, when test block temperature When stabilization is in the range of experimental temperature, the feeding amount of cold wind is kept, so as to realize stable low temperature environment;Thermal infrared imager is simultaneously The temperature field of test block is monitored, when the temperature of test block is more than experimental temperature setting value, control valve control vector cold wind nozzle is straight Connect to test block area of localized hyperthermia and supplement cold wind, make localized hyperthermia's area's fast cooling to setting value, so circulation, until experiment is tied Beam;In order to prevent the supplement cold wind for the cold wind and valve control vector cold wind nozzle ejection injected in experimentation to testing load-sensing unit Impact, should be by experiment load-sensing unit cover in a case.

Described liquid nitrogen injects from four folding corner regions of low temperature casing, the injection rate of liquid nitrogen and required low-temperature working temperature Relation be:

In formula:VN2For the volume of required nitrogen, Q is the heat exchanged, TAFor cryogenic box initial temperature, T is required low temperature Operating temperature, CN2For the specific heat capacity of nitrogen, PN2For the density of nitrogen.

The air port that described cold air inlet is located at low temperature box house uses adjustable wind blade, so that cold wind point Cloth is uniform, realizes that low temperature environment is quickly distributed in whole low temperature casing.

Described valve control vector cold wind nozzle is including the telescopic cylindrical bar that can circumferentially rotate, a hunting range 120 ° of disk and nozzle;By the area of flexible preliminary alignment localized hyperthermia of telescopic cylindrical bar, recycle disk rotation and The swing of nozzle repositions and is directed at area of localized hyperthermia.

Described low temperature casing is made using insulation material, and the dynamometry beam for connecting load-sensing unit uses the nylon of poor thermal conductivity Insulation material is enclosed with outside material manufacture, the air-supply of cold wind and wind pipe.

The two of technical scheme are:

A kind of low temperature friction wear testing machine low temperature test casing, it includes being used to install the low of mill 9 and dynamometry beam 5 Incubator body 1, it is characterized in that the top of described low temperature casing 1 is provided with cold air inlet 4 and air outlet 2, the four of low temperature casing 1 Week is filled with area 15 to make the temperature in cryogenic box body rapidly drop to setting value provided with least one liquid nitrogen;In low temperature casing 1 Side the valve control vector nozzle 16 of oriented high-temperature region supplement cold wind is installed, infrared thermal imagery is installed on the top of low temperature casing 1 Instrument 3, thermal infrared imager 3 is according to the intake of the temperature control cold air inlet 4 detected and the benefit wind of valve control vector nozzle 16 Amount, so that the interior environment temperature of low temperature casing 1 and the local temperature of trial zone are maintained in setting range, it is low temperature friction Wear test provides required operating temperature.

Described valve control vector cold wind nozzle is including the telescopic cylindrical bar 6 that can circumferentially rotate, a hunting range 120 ° of disk 7 and nozzle 8;By the area of flexible preliminary alignment localized hyperthermia of telescopic cylindrical bar 6, turning for disk 7 is recycled Dynamic and nozzle 8 swing repositions and is directed at area of localized hyperthermia.

The quantity that described liquid nitrogen is filled with area 15 is four.

The quantity of described valve control vector nozzle 16 is 2, and it is symmetrically mounted on mill 9 and the line of testing machine supporting mass 14 Both sides.

The cover of force snesor 11 installed on described dynamometry beam 5 is equipped with case 10.

Beneficial effects of the present invention:

The present invention by nitrogen draining air-liquid nitrogen fast-refrigerating, the refrigeration modes of reasonable Arrangement ventilating opening and direct sending cold wind, The refrigeration reached quickly, uniformly, stably, and will not produce the ice sheet being covered on sample in experimentation;It is infrared The use of detector and valve control vector nozzle, it is accurate rapidly to the feedback control in temperature field, monitored in real time in environmental chamber at low temperature While temperature field, nozzle auxiliary temperature-reducing can be passed through to local high-temperature region;, can by way of placing small box on dynamometry beam To allow the operating temperature of sensor not limited by requirement of experiment temperature, cost and the time of purchase respective sensor are saved;It is small Thermocouple and heating wire work simultaneously in casing, can easily observe and adjust the environment temperature in small box, accomplish in real time Monitoring and control.

The present invention is simple in construction, and manufacture is easy to control, and experimental cost is low, and effect is good.

Brief description of the drawings

Fig. 1 is the structural representation of the low temperature test device of the present invention.

Fig. 2 is the schematic diagram in the A/B/C/D regions that liquid nitrogen fast-refrigerating part liquid nitrogen is sent into.

Fig. 3 is that ventilating opening is fixed, is sent into after cold wind cold wind Flow Field Distribution analogous diagram in environmental chamber at low temperature.

In figure:1 low temperature casing;2 air outlets (as shown by arrows);3 thermal infrared imagers;4 air inlets (as shown by arrows);5 Dynamometry beam I;6 telescopic cylindrical bars;7 disks;8 cold wind nozzles;9 mills;10 cases;11 force snesors;12 heating wire;13 dynamometry Beam II;14 testing machine supporting masses;15 liquid nitrogen are filled with mouth;16 valve control vector nozzles;17 liquid nitrogen are filled with region.

Embodiment

The present invention is further illustrated with reference to the accompanying drawings and examples.

Embodiment one.

A kind of low temperature friction wear testing machine operating temperature control method, it comprises the following steps:

First, the air in the low temperature casing for installing low temperature friction wear testing machine is discharged using air exhauster, while to Moisture free nitrogen is passed through in low temperature casing so that atmosphere in low temperature casing not containing water vapor;

Secondly, from four liquid nitrogen injection regions 17 of low temperature casing, into low temperature casing, liquid enters liquid nitrogen, as shown in Fig. 2 making low Temperature in incubator body rapidly drops to the operating temperature needed for low temperature friction wear testing machine;The injection rate of liquid nitrogen with it is required The relation of low-temperature working temperature is:

In formula:VN2For the volume of required nitrogen, Q is the heat exchanged, TAFor cryogenic box initial temperature, T is required low temperature Operating temperature, CN2For the specific heat capacity of nitrogen, PN2For the density of nitrogen.

3rd, cold air inlet, cold wind air intake are set on the low temperature casing above low temperature friction wear testing machine The side of mouth sets air outlet, is sent into cold wind into cryogenic box body by the cold air inlet, makes being maintained in cryogenic box body In the operating temperature range of setting;Led preferably with adjustable in the air port that described cold air inlet is located at low temperature box house Air blade, so that cooling air distribution is uniform, realize that low temperature environment is quickly distributed in whole low temperature casing.As shown in Figure 1.

4th, the valve control vector cold wind nozzle for adjusting area of localized hyperthermia is installed in low temperature body side;Described valve Control the disk and nozzle that vector cold wind nozzle includes a telescopic cylindrical bar that can circumferentially rotate, hunting range is 120 °; By the area of flexible preliminary alignment localized hyperthermia of telescopic cylindrical bar, the rotation of disk and the swing of nozzle is recycled to reposition And it is directed at area of localized hyperthermia.Described low temperature casing is made using insulation material, and the dynamometry beam for connecting load-sensing unit uses heat conduction Property difference nylon material manufacture, be enclosed with insulation material outside the air-supply of cold wind and wind pipe.

5th, thermal infrared imager is installed on low temperature casing, the signal input temp control system of thermal infrared imager collection, When the test block temperature of thermal infrared imager monitoring drops to temperature needed for experiment, it is cold that temperature control system reduces cold air inlet The feeding amount of wind, when test block temperature is higher than experimental temperature, temperature control system increases the feeding amount of cold wind, when test block temperature When stabilization is in the range of experimental temperature, the feeding amount of cold wind is kept, so as to realize stable low temperature environment;Thermal infrared imager is simultaneously The temperature field of test block is monitored, when the temperature of test block is more than experimental temperature setting value, control valve control vector cold wind nozzle is straight Connect to test block area of localized hyperthermia and supplement cold wind, make localized hyperthermia's area's fast cooling to setting value, so circulation, until experiment is tied Beam;In order to prevent the supplement cold wind for the cold wind and valve control vector cold wind nozzle ejection injected in experimentation to testing load-sensing unit Impact, should be by experiment load-sensing unit cover in a case.The movement and blow valve control of valve control vector cold wind nozzle 16 The control system of switch can realize that cold wind is sent into and to local high-temperature region together with temperature control system by control software Positioning and cooling.After liquid nitrogen fast-refrigerating terminates, software switch opens blow valve control switch, starts cold wind and is sent into, uniform temperature .The coordinate in the area of localized hyperthermia according to thermal infrared imager, the rotation and swing of software control valve control vector cold wind nozzle Positioning, the valve of vector nozzle is then opened by software switch, cold wind auxiliary temperature-reducing is supplemented to high-temperature region.

Embodiment two.

As shown in Figure 1.

A kind of low temperature friction wear testing machine operating temperature control method, after nitrogen excludes vapor, to environmental chamber at low temperature In be filled with -197 DEG C of liquid nitrogen fast-refrigeratings, the size of low temperature environment casing 1 is 1300mm × 750mm × 750mm, it is selected firmly pass The operating temperature range of sensor 11 is -10 DEG C~40 DEG C, and air inlet 4, air outlet 2 are used for a diameter of Φ of section of stretching out of external pipe 61mm, control refrigeration machine cooling is to -10 DEG C, the supplying nitrogen into casing, and the initial wind speed that cools is arranged to 50m/s, adjusts simultaneously Wind blade face is to grinding region, and into casing, feeding liquid nitrogen, the inlet valve of nitrogen and the valve of vector nozzle pass through software In switch be controlled.

It is first introduced into during cold wind, warm material parcel and the pipeline of banding and its is connected with low temperature environment casing Locate no air leakage phenomena, also without solidifying white phenomenon.Environmental chamber at low temperature body temperature passes through thermal infrared imager detection and feedback signal. Distinguish the flexible of control valve control vector nozzle, rotation by three motors and swing positioning function, can realize three-dimensional in casing Space orientation.

Refrigeration terminates, and opens low temperature environment casing 1, observes to grinding region, does not find obvious ice sheet.Utilize this method Refrigeration fast and stable is carried out, and ice sheet is hardly produced to mill region.

Embodiment three.

As shown in Figure 1,3.

A kind of temperature controlled method of low temperature friction wear testing machine, after nitrogen excludes vapor, into environmental chamber at low temperature It is filled with -197 DEG C of liquid nitrogen fast-refrigeratings, the size of low temperature environment casing 1 is 1300mm × 750mm × 750mm, selected force snesor 11 operating temperature range is -10 DEG C~40 DEG C, and air inlet 4, air outlet 2 are used for a diameter of Φ of section of stretching out of external pipe 61mm, control refrigeration machine cooling is to -30 DEG C, the supplying nitrogen into casing, and the initial wind speed that cools is arranged to 50m/s, adjusts simultaneously Wind blade face is to grinding region.The valve of liquid nitrogen, the inlet valve of nitrogen and vector nozzle is sent into casing by soft Switch in part is controlled.

Environmental chamber at low temperature body temperature is sprayed by thermal infrared imager detection and feedback signal using motor control valve control vector Positioning of the mouth to local high-temperature region.By 3 hours, the thermocouple through placing temperature in force snesor small box 10 for measuring was examined Survey, within the temperature range of temperature maintains force snesor 11 in small box 10.The cold wind entered by ventilating opening 4, wind speed during entrance It is most fast;Into after low temperature environment casing 1, cold wind sinks, and wind speed reduces;Cold wind flows between small box 10 and support base 14 Cross;Flowed out afterwards from air outlet 2, wind speed is speeded.Cold wind flow field simulation is as shown in Figure 3.

Example IV.

As shown in Figure 1-2.

The two of technical scheme are:

A kind of low temperature friction wear testing machine low temperature test casing, it includes being used to install the low of mill 9 and dynamometry beam 5 Incubator body 1, low temperature casing 1 are made using insulation material, connect the dynamometry beam 5 of load-sensing unit using the nylon material of poor thermal conductivity Manufacture, the top of described low temperature casing 1 are provided with cold air inlet 4 and air outlet 2, the air-supply of cold wind and the outer bread of wind pipe It is wrapped with insulation material;The surrounding of low temperature casing 1 be respectively provided with one totally four liquid nitrogen be filled with area 15 (such as Fig. 2) to make cryogenic box Internal temperature rapidly drops to setting value;The valve control vector of oriented high-temperature region supplement cold wind is installed in the side of low temperature casing 1 Nozzle 16, thermal infrared imager 3 is installed on the top of low temperature casing 1, thermal infrared imager 3 is according to the temperature control cold wind detected The intake of air inlet 4 and the benefit air quantity of valve control vector nozzle 16, so that the interior environment temperature and trial zone of low temperature casing 1 Local temperature be maintained in setting range, required operating temperature is provided for low temperature friction-wear test.Described valve control arrow Measure the disk 7 and nozzle 8 that cold wind nozzle includes a telescopic cylindrical bar 6 that can circumferentially rotate, hunting range is 120 °;It is logical The area of flexible preliminary alignment localized hyperthermia of telescopic cylindrical bar 6 is crossed, recycles the rotation of disk 7 and the swing of nozzle 8 to determine again Position is simultaneously directed at area of localized hyperthermia.The quantity of described valve control vector nozzle 16 is 2, and it is symmetrically mounted on mill 9 and testing machine The both sides of the line of supporting mass 14.The cover of force snesor 11 installed on described dynamometry beam 5 is equipped with case 10.It is as shown in figure 1, long Top distribution left and right two ventilating opening (air-supply, another air-out) of square low temperature casing 1, the design in box house air port Using adjustable wind blade, make cooling air distribution uniform, realize that low temperature environment is quickly distributed in whole casing.It is sent into cold wind extremely When in casing, the air outlet of top answers face to be tested as early as possible to mill area to grinding region, preferential cooling;Simultaneously in low temperature ring Two valve control vector cold wind nozzles are installed in the both sides of border case, and cold wind nozzle is when test block local temperature field is uneven to local height Warm area supplements cold wind, and making test block temperature, quickly cooling is uniform.Low temperature environment box top is installed by thermal infrared imager, thermal infrared imager The signal input temp control system of collection, when the test block temperature of thermal infrared imager monitoring drops to temperature needed for experiment, Temperature control system reduces the feeding amount of cold wind, and when test block temperature is higher than experimental temperature, temperature control system increases cold wind Feeding amount, when test block temperature stabilization is in the range of experimental temperature, the feeding amount of cold wind is kept, so as to realize stable low temperature Environment;Thermal infrared imager monitors the temperature field of test block simultaneously, by temperature field can slowdown monitoring localized hyperthermia zone position soon, be Cold wind nozzle positions to test block area of localized hyperthermia supplement cold wind.Movement and blow valve the control switch of valve control vector cold wind nozzle 16 Control system together with temperature control system can by conventional control software come realize cold wind be sent into and to local high-temperature region Positioning and cooling.After liquid nitrogen fast-refrigerating terminates, software switch opens blow valve control switch, starts cold wind and is sent into, uniform temperature .The coordinate in the area of localized hyperthermia according to thermal infrared imager, the rotation and swing of software control valve control vector cold wind nozzle Positioning, the valve of vector nozzle is then opened by software switch, cold wind auxiliary temperature-reducing is supplemented to high-temperature region.

Part that the present invention does not relate to is same as the prior art or can be realized using prior art.

Claims (9)

1. a kind of low temperature friction wear testing machine operating temperature control method, it is characterized in that:
First, the air in the low temperature casing for installing low temperature friction wear testing machine is discharged using air exhauster, while to low temperature Moisture free nitrogen is passed through in casing so that atmosphere in low temperature casing not containing water vapor;
Secondly, into low temperature casing, liquid enters liquid nitrogen, the temperature in low temperature casing is rapidly dropped to low temperature friction wear testing machine Required operating temperature;
3rd, cold air inlet is set on the low temperature casing above low temperature friction wear testing machine, cold air inlet Side sets air outlet, is sent into cold wind into cryogenic box body by the cold air inlet, makes to be maintained at setting in cryogenic box body Operating temperature range in;
4th, the valve control vector cold wind nozzle for adjusting area of localized hyperthermia is installed in low temperature body side;
5th, thermal infrared imager is installed on low temperature casing, the signal input temp control system of thermal infrared imager collection is hot When the test block temperature of outer thermal imaging system monitoring drops to temperature needed for experiment, temperature control system reduces cold air inlet cold wind Feeding amount, when test block temperature is higher than experimental temperature, temperature control system increases the feeding amount of cold wind, when test block temperature stabilization When in the range of experimental temperature, the feeding amount of cold wind is kept, so as to realize stable low temperature environment;Thermal infrared imager monitors simultaneously The temperature field of test block, when the temperature of test block is more than experimental temperature setting value, control valve control vector cold wind nozzle directly to Test block area of localized hyperthermia supplements cold wind, makes localized hyperthermia's area's fast cooling to setting value, so circulation, until experiment terminates; In order to prevent the supplement cold wind for the cold wind and valve control vector cold wind nozzle ejection injected in experimentation from being made to experiment load-sensing unit , should be by experiment load-sensing unit cover in a case into influence.
2. according to the method for claim 1, it is characterized in that described liquid nitrogen injects from four folding corner regions of low temperature casing, liquid The relation of the injection rate of nitrogen and required low-temperature working temperature is:
<mrow> <msub> <mi>V</mi> <msub> <mi>N</mi> <mn>2</mn> </msub> </msub> <mo>=</mo> <mfrac> <mi>Q</mi> <mrow> <mo>(</mo> <msub> <mi>T</mi> <mi>A</mi> </msub> <mo>-</mo> <mi>T</mi> <mo>)</mo> <msub> <mi>C</mi> <msub> <mi>N</mi> <mn>2</mn> </msub> </msub> <msub> <mi>P</mi> <msub> <mi>N</mi> <mn>2</mn> </msub> </msub> </mrow> </mfrac> <mo>;</mo> </mrow>
In formula:VN2For the volume of required nitrogen, Q is the heat exchanged, TAFor cryogenic box initial temperature, T is required low-temperature working Temperature, CN2For the specific heat capacity of nitrogen, PN2For the density of nitrogen.
3. according to the method for claim 1, it is characterized in that described cold air inlet is located at one end of low temperature box house Adjustable wind blade is installed, so that cooling air distribution is uniform, realizes that low temperature environment is quickly distributed in whole low temperature casing.
4. according to the method for claim 1, it is characterized in that described valve control vector cold wind nozzle can be circumferentially including one Telescopic cylindrical bar, the disk and nozzle that hunting range is 120 ° rotated;Pass through the flexible preliminary alignment of telescopic cylindrical bar Area of localized hyperthermia, the rotation of disk and the swing of nozzle is recycled to reposition and be directed at area of localized hyperthermia.
5. according to the method for claim 1, connect dynamometry it is characterized in that described low temperature casing is made using insulation material The dynamometry beam of element is manufactured using the nylon material of poor thermal conductivity, and thermal insulating material is enclosed with outside the air-supply of cold wind and wind pipe Material.
6. a kind of low temperature friction wear testing machine low temperature test casing, it includes being used for installing mill (9) and dynamometry beam (5) Low temperature casing (1), it is characterized in that the top of described low temperature casing (1) is provided with cold air inlet (4) and air outlet (2), low At least one liquid nitrogen that is surrounded by of incubator body (1) is filled with area (15) to make the temperature in cryogenic box body rapidly drop to setting Value;The valve control vector nozzle (16) of oriented high-temperature region supplement cold wind is installed in the side of low temperature casing (1), in low temperature casing (1) Top thermal infrared imager (3) is installed, thermal infrared imager (3) enters according to temperature control cold air inlet (4) detected The benefit air quantity of air quantity and valve control vector nozzle (16), so that the interior environment temperature of low temperature casing (1) and the part of trial zone Temperature is maintained in setting range, and required operating temperature is provided for low temperature friction-wear test;Described valve control vector cold wind The disk (7) and nozzle (8) that nozzle includes a telescopic cylindrical bar (6) that can circumferentially rotate, hunting range is 120 °;It is logical The area of flexible preliminary alignment localized hyperthermia of telescopic cylindrical bar (6) is crossed, recycles the rotation of disk (7) and the swing of nozzle (8) Reposition and be directed at area of localized hyperthermia.
7. low temperature test casing according to claim 6, it is characterized in that the quantity that described liquid nitrogen is filled with area (15) is Four.
8. low temperature test casing according to claim 6, it is characterized in that the quantity of described valve control vector nozzle (16) For 2, it is symmetrically mounted on the both sides of mill (9) and testing machine supporting mass (14) line.
9. low temperature test casing according to claim 6, it is characterized in that the power sensing installed on described dynamometry beam (5) Device (11) cover is equipped with case (10).
CN201610341000.7A 2016-05-23 2016-05-23 Low temperature friction wear testing machine operating temperature control method and casing CN106020277B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106742559B (en) * 2016-12-21 2018-02-09 南京航空航天大学 A kind of low temperature friction wear testing machine double-layer heat insulation body structure
CN106766300A (en) * 2016-12-30 2017-05-31 安徽亿瑞深冷能源科技有限公司 For quick changeable temperature testing equipment from high temperature to room temperature section fast cooling device

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US4344565A (en) * 1979-08-01 1982-08-17 Nippondenso Co., Ltd. Control method and apparatus for air conditioners
CN102798573A (en) * 2012-08-16 2012-11-28 浙江大学 Cryogenic environment material mechanical performance detection test device
CN102819280A (en) * 2012-08-13 2012-12-12 河南科技大学 Local environment temperature control method and device used for ball disc type friction testing machine
CN202795088U (en) * 2012-08-13 2013-03-13 河南科技大学 Local environmental temperature control device used for ball-on-disc friction testing machine
CN205164752U (en) * 2015-11-05 2016-04-20 广州威德玛环境仪器有限公司 Novel cold test case

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Publication number Priority date Publication date Assignee Title
US4344565A (en) * 1979-08-01 1982-08-17 Nippondenso Co., Ltd. Control method and apparatus for air conditioners
CN102819280A (en) * 2012-08-13 2012-12-12 河南科技大学 Local environment temperature control method and device used for ball disc type friction testing machine
CN202795088U (en) * 2012-08-13 2013-03-13 河南科技大学 Local environmental temperature control device used for ball-on-disc friction testing machine
CN102798573A (en) * 2012-08-16 2012-11-28 浙江大学 Cryogenic environment material mechanical performance detection test device
CN205164752U (en) * 2015-11-05 2016-04-20 广州威德玛环境仪器有限公司 Novel cold test case

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