CN107064214A - A kind of measurement apparatus of fixed combinating surface thermal contact resistance - Google Patents
A kind of measurement apparatus of fixed combinating surface thermal contact resistance Download PDFInfo
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- CN107064214A CN107064214A CN201710450615.8A CN201710450615A CN107064214A CN 107064214 A CN107064214 A CN 107064214A CN 201710450615 A CN201710450615 A CN 201710450615A CN 107064214 A CN107064214 A CN 107064214A
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- test specimen
- thermal resistance
- resistance test
- heat
- force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
Abstract
The invention discloses a kind of measurement apparatus of fixed combinating surface thermal contact resistance, a kind of measurement apparatus of fixed combinating surface thermal contact resistance, including support section, apply load part, heat carrier, insulating sleeve, measure test specimen and temperature detection part；The measurement test specimen is placed in insulating sleeve, and measurement test specimen includes lower thermal resistance test specimen and upper thermal resistance test specimen；Lower thermal resistance test specimen is placed on heat carrier, and upper thermal resistance test specimen is placed on lower thermal resistance test specimen；It is described apply carry part include being arranged on thermal resistance test specimen under being below heat carrier apply the heat generating components of thermal force and be arranged on outer support bar top be upper thermal resistance test specimen applying power load mechanical force application mechanism；The temperature detection part includes the SMD temperature sensor being arranged on lower thermal resistance test specimen and upper thermal resistance test specimen, and temperature sensor is connected with signal acquiring system.The present invention can realize the independent factor impact analysis and composite factor impact analysis of material, power load, heat source temperature, surface roughness to faying face thermal contact resistance.
Description
Technical field
It is particularly a kind of in order to obtain Fixed Joints in Machine Tools thermal contact resistance the present invention relates to numerical control machine tool technique field
The measurement apparatus of the fixed combinating surface thermal contact resistance of design.
Background technology
In the fields such as Design of Mechanical Structure, thermal contact resistance is one of critically important parameter, and whether its value is accurate directly to close
It is tied to the internal heat transfer of mechanical structure.There is substantial amounts of fixed combinating surface in lathe, so the thermal contact resistance of research fixed combinating surface,
It is accurate that machine tool system must be carried out Thermal characteristic analysis to ensure that machine finish has practical significance.
Research and analyse and show, thermal contact resistance is one by the hot physical property of material, material mechanical characteristic, material surface property, table
The nonlinear problem of many factors such as surface roughness and load, temperature, medium and environment influence.The research of this problem is related to
The multiple fields such as microcosmic description, the Deformation Theory of material, the thermal contact conductance of rough surface.Thermal contact resistance can be by theoretical pre-
Survey, but influenceed by various factors coupling and its heat-transfer mechanism is more complicated, existing theoretical model and formula and Practical Project should
With also in the presence of very big gap.So far, the external research on thermal resistance is relatively more also achieves some achievements, but because
The Research on differences achievement of application material and process technology is not applied at home.
The content of the invention
The present invention provides a kind of survey of fixed combinating surface thermal contact resistance to solve technical problem present in known technology
Measure device.
The present invention is adopted the technical scheme that to solve technical problem present in known technology：
A kind of measurement apparatus of fixed combinating surface thermal contact resistance, including support section, apply load part, heat carrier, collet
Cylinder, measurement test specimen and temperature detection part；
The support section includes pedestal and the outer support bar and inner bracing piece that are vertically arranged on pedestal, pedestal
Top plate is provided centrally with through hole, and the heat carrier is fixedly mounted in the through hole of top plate by mounting flange；On inner bracing piece
Upper flange plate and lower flange are provided with, the insulating sleeve is placed between upper flange plate and lower flange；
The measurement test specimen is placed in insulating sleeve, and measurement test specimen includes lower thermal resistance test specimen and upper thermal resistance test specimen；Lower heat
It is the equal cylinder of diameter to hinder test specimen and upper thermal resistance test specimen, and lower thermal resistance test specimen is placed on heat carrier, and upper thermal resistance test specimen is placed on
On lower thermal resistance test specimen；
It is described apply carry part include be arranged on below heat carrier for lower thermal resistance test specimen apply thermal force heat generating components and
The mechanical force application mechanism for upper thermal resistance test specimen applying power load on outer support bar top is arranged on, wherein：Heat generating components is with leading
Hot body contact, thermal force is conducted by the downward thermal resistance test specimen of heat carrier；Mechanical force application mechanism includes push rod, rod set, sensor
Bearing, hydraulic pressure force application apparatus, push rod are set in rod set, and rod set is fixed on force snesor bearing, force snesor bearing and liquid
Press the actuating strut of force application apparatus to be connected, hydraulic pressure force application apparatus is fixedly mounted on outer support bar top, pacify in force snesor bearing
Equipped with ring-type force cell；The actuating strut drive sensor support base of hydraulic pressure force application apparatus is moved down, and force snesor bearing passes through
The upward thermal resistance test specimen of ring-type force cell driving push rod applies pressure, detects push rod to upper thermal resistance by ring-type force cell
Test specimen applies stressed size；
The temperature detection part includes the SMD temperature sensor being arranged on lower thermal resistance test specimen and upper thermal resistance test specimen,
Temperature sensor is connected with signal acquiring system.
Further, pedestal is made up of left and right sides bottom plate, left and right sides supporting plate, front and rear stiffening plate and top plate, and top plate passes through
Bolt is horizontally arranged at supporting plate top, and bottom plate is connected to supporting plate bottom.
Further, the heat carrier is the cylinder of red copper material.
Further, heat generating components selects resistance furnace.
Further, hydraulic pressure force application apparatus is hydraulic screw rod.
Further, the insulating sleeve includes outer insulating sleeve and interior insulating sleeve.
The present invention has the advantages and positive effects of：
The thermal contact resistance measurement apparatus of the present invention can realize material, power load, heat source temperature, surface roughness to combination
The independent factor impact analysis of face thermal contact resistance and composite factor impact analysis.It is certain by other conditions selection, change a kind of
Variable, is tested, gathered data, processing data, calculates thermal contact resistance numerical value, by analysis with being compared, holds thermal contact resistance
The rule influenceed by Variable Factors.
Brief description of the drawings
Fig. 1 is structural representation -- the front view of apparatus of the present invention；
Fig. 2 is the stereogram of apparatus of the present invention；
Fig. 3 is the enlarged drawing of the mechanical force application mechanism of apparatus of the present invention.
Embodiment
In order to further understand the content, features and effects of the present invention, hereby enumerating following examples, and coordinate accompanying drawing
Describe in detail as follows：
Referring to accompanying drawing, a kind of measurement apparatus of fixed combinating surface thermal contact resistance, including support section, apply load part, heat conduction
Body, insulating sleeve, measurement test specimen and temperature detection part；
The support section includes pedestal 1 and the outer support bar 2 and inner bracing piece 3 that are vertically arranged on pedestal 1, base
Seat is made up of left and right sides bottom plate 1-1, left and right sides supporting plate 1-2, front and rear stiffening plate 1-3 and top plate 1-4, and top plate 1-4 passes through bolt
Supporting plate 1-2 tops are horizontally arranged at, bottom plate 1-1 is connected to supporting plate 1-2 bottoms；Outer support bar 2 includes four M12*750 spiral shells
Rasp bar, four M12*750 threaded rods are fixed on the top plate 1-4 of pedestal vertically；Inner bracing piece 3 includes four M6*600 screw threads
Bar, four M6*600 threaded rods are fixed on the top plate 1-4 of pedestal vertically；
The top plate 1-4 of pedestal is provided centrally with through hole, and the heat carrier 4 is fixedly mounted on top plate 1-4 by mounting flange 5
Through hole in (fixed by bolt with top plate on the outside of mounting flange, heat carrier is fixed on mounting flange inner side)；
Upper flange plate 6-1 and lower flange 6-2 are provided with inner bracing piece, the insulating sleeve 7 is placed on upper flange
Between disk 6-1 and lower flange 6-2；
The measurement test specimen is placed in insulating sleeve 7, and measurement test specimen includes lower thermal resistance test specimen 8-1 and upper thermal resistance test specimen 8-
2；Lower thermal resistance test specimen 8-1 and upper thermal resistance test specimen 8-2 is cylinder, and diameter is equal；Lower thermal resistance test specimen 8-1 is placed on heat carrier
On 4, upper thermal resistance test specimen 8-2 is placed on lower thermal resistance test specimen 8-1；
It is described to apply the heat generating components for lower thermal resistance test specimen 8-1 application thermal forces for carrying and partly including being arranged on below heat carrier
9 and the mechanical force application mechanism 10 for upper thermal resistance test specimen 8-2 applying power load on outer support bar top is arranged on, wherein：Heating
Part 9 selects resistance furnace, and resistance furnace is arranged in pedestal, and resistance furnace is contacted with heat carrier 4, passes through the downward thermal resistance test specimen of heat carrier
8-1 conducts thermal force, and during work, resistance furnace can set different temperatures, is carried for the lower thermal resistance test specimen 8-1 heat for loading different temperatures
Lotus；Mechanical force application mechanism 10 includes push rod 10-1, rod set 10-2, sensor support base 10-3, hydraulic pressure force application apparatus 10-4, push rod
10-4 is slidably located in rod set 10-2, and rod set 10-2 is fixed on force snesor bearing 10-3 using two screw a, power sensing
Device bearing 10-3 is connected with hydraulic pressure force application apparatus 10-4 actuating strut, and hydraulic pressure force application apparatus 10-4 is fixed on by mounting flange 11
On installing plate 12, installing plate 12 is horizontally fixed on the top of outer support bar 2, and ring-type dynamometry is provided with force snesor bearing 10-3
On sensor 10-5, ring-type force cell 10-5 push rod 10-4 is met under relay sensor support base 10-3；Mechanical force application mechanism
The principle of 10 loading forces is：Hydraulic pressure force application apparatus 10-4 actuating strut drive sensor support base 10-3 is moved down, force snesor branch
Seat 10-3 drives the upward thermal resistance test specimen 8-2 applying powers of push rod 10-4 by ring-type force cell 10-5, is passed by ring-type dynamometry
Sensor 10-5 detects sizes of the push rod 10-4 to upper thermal resistance test specimen 8-2 applying powers；
The temperature detection part includes the SMD temperature being arranged on lower thermal resistance test specimen 8-1 and upper thermal resistance test specimen 8-2
Sensor, temperature sensor is connected with signal acquiring system, and signal acquiring system is connected with PC.
In the present embodiment, the heat carrier 4 is the cylinder of red copper material.
In the present embodiment, the measurement test specimen refers to：It is made long by materials such as HT300, QT500, GCr15,45
250mm, diameter 78mm cylinder.
In the present embodiment, affiliated hydraulic pressure force application apparatus is hydraulic screw rod or hydraulic cylinder.
In the present embodiment, the insulating sleeve 7 includes interior insulating sleeve 7-1 and outer insulating sleeve 7-2, upper flange plate 6-
1 and lower flange 6-2 opposite face is provided with a circle boss c and (is provided with i.e. below upper flange plate and above lower flange
Relative boss c), outer insulating sleeve 7-2 is arranged on the outside of boss, and interior insulating sleeve 7-1 is arranged on the inner side of boss.
The operation principle of the present invention：
The certain experiment condition of setting：The heat source temperature value (being set by heat generating components) of determination, it is determined that pressure loading
(being set by mechanical force application mechanism), the thermal resistance material for test (prefabricated in advance as requested) determined, the thermal resistance test specimen determined
The surface roughness (prefabricated in advance as requested) of faying face, by setting these parameters come the building ring of simulated machine tool faying face
Border；Start experiment, heat generating components heating, heat is passed up to lower thermal resistance test specimen 8-1 by red copper heat carrier 4, then heat
Upper thermal resistance test specimen 8-2 is passed to from lower thermal resistance test specimen 8-1, signal acquiring system passes through thermal resistance test specimen 8- under coupled being arranged in
SMD temperature sensor on 1 and upper thermal resistance test specimen 8-2 gathers the temperature signal of two test specimens, the analog temperature of collection in real time
Signal is sent to PC after signal acquiring system digital-to-analogue conversion, and PC records lower thermal resistance test specimen 8-1 and the examination of upper thermal resistance respectively
Part 8-2 temperature changes over time data, and (PC can be using the lower thermal resistance test specimen 8-1 of LABVIEW softwares display in real time and upper thermal resistance
The curve that test specimen 8-2 temperature is changed over time)；Finally, thermal contact resistance R is carried out according to these dataCCalculating.
Thermal contact resistance RCComputational methods be：Utilize formulaCalculate faying face interface heat exchange coefficient, boundary
The inverse of the face coefficient of heat transfer is thermal contact resistance RC。
Wherein, Q is lower thermal resistance test specimen 8-1 heat flow Q1With upper thermal resistance test specimen 8-2 heat flow Q2Average value, i.e.,Lower thermal resistance test specimen 8-1 heat flow Q1=λ1·A·k1, upper thermal resistance test specimen 8-2 heat flow Q2=λ2·
A·k2, wherein λ1、λ2Respectively descend the thermal conductivity of thermal resistance test specimen and upper thermal resistance test specimen, k1、k2It is lower thermal resistance test specimen and upper heat respectively
(lower thermal resistance test specimen 8-1 and upper thermal resistance test specimen 8-2 temperature according to measuring change over time number to the rate temperature change of resistance test specimen
According to the T-X for drawing lower thermal resistance test specimen 8-1 and upper thermal resistance test specimen 8-2 respectively schemes (T is temperature, and X is the time), ignores radiation and right
The influence of heat exchange is flowed, each point temperature is approximately straight line on T-X figures, according to curve matching least square method, can be asked respectively
Go out the slope k of the straight line of lower thermal resistance test specimen 8-1 and upper thermal resistance test specimen 8-2 T-X figures1、k2, slope k1、k2As temperature change is fast
Rate)；A is the cross-sectional area of lower thermal resistance test specimen or upper thermal resistance test specimen, A=π r2, r is lower thermal resistance test specimen or upper thermal resistance test specimen
Radius (diameter of lower thermal resistance test specimen or upper thermal resistance test specimen is equal, and cross-sectional area is equal)；
AnIt is the real contact area of lower thermal resistance test specimen and upper thermal resistance test specimen faying face, A is obtained using red lead powder polishingn；
ΔTcIt is lower thermal resistance test specimen and upper thermal resistance test specimen；The temperature difference of contact interface, according to the lower thermal resistance test specimen 8-1 that measures and
Upper thermal resistance test specimen 8-2 temperature changes over time data, utilizes temperature of the epitaxy according to linear function calculation testing piece contact interface
Poor Δ Tc。
Although the preferred embodiments of the present invention are described above in conjunction with accompanying drawing, the invention is not limited in upper
The embodiment stated, above-mentioned embodiment is only schematical, be not it is restricted, this area it is common
Technical staff in the case of present inventive concept and scope of the claimed protection is not departed from, may be used also under the enlightenment of the present invention
To make many forms, these are belonged within protection scope of the present invention.
Claims (6)
1. a kind of measurement apparatus of fixed combinating surface thermal contact resistance, it is characterised in that：Including support section, apply load part, heat conduction
Body, insulating sleeve, measurement test specimen and temperature detection part；
The support section includes pedestal and the outer support bar and inner bracing piece that are vertically arranged on pedestal, the top plate of pedestal
Through hole is provided centrally with, the heat carrier is fixedly mounted in the through hole of top plate by mounting flange；Set on inner bracing piece
There are upper flange plate and lower flange, the insulating sleeve is placed between upper flange plate and lower flange；
The measurement test specimen is placed in insulating sleeve, and measurement test specimen includes lower thermal resistance test specimen and upper thermal resistance test specimen；Lower thermal resistance examination
Part and upper thermal resistance test specimen are the equal cylinder of diameter, and lower thermal resistance test specimen is placed on heat carrier, and upper thermal resistance test specimen is placed on lower heat
Hinder on test specimen；
It is described to apply the heat generating components and the setting that apply thermal force for lower thermal resistance test specimen for carrying and partly including being arranged on below heat carrier
In the mechanical force application mechanism for upper thermal resistance test specimen applying power load of outer supporting bar top, wherein：Heat generating components and heat carrier
Contact, thermal force is conducted by the downward thermal resistance test specimen of heat carrier；Mechanical force application mechanism include push rod, rod set, sensor support base,
Hydraulic pressure force application apparatus, push rod is set in rod set, and rod set is fixed on force snesor bearing, and force snesor bearing exerts a force with hydraulic pressure
The actuating strut of device is connected, and hydraulic pressure force application apparatus, which is put, is fixedly mounted on outer support bar top, is provided with force snesor bearing
Ring-type force cell；The actuating strut drive sensor support base of hydraulic pressure force application apparatus is moved down, and force snesor bearing passes through ring-type
The upward thermal resistance test specimen of force cell driving push rod applies pressure, detects push rod to upper thermal resistance test specimen by ring-type force cell
Apply stressed size；
The temperature detection part includes the SMD temperature sensor being arranged on lower thermal resistance test specimen and upper thermal resistance test specimen, temperature
Sensor is connected with signal acquiring system.
2. a kind of measurement apparatus of fixed combinating surface thermal contact resistance according to claim 1, it is characterised in that：Pedestal is by a left side
Right side bottom plate, left and right sides supporting plate, front and rear stiffening plate and top plate composition, top plate are horizontally arranged at supporting plate top by bolt,
Bottom plate is connected to supporting plate bottom.
3. a kind of measurement apparatus of fixed combinating surface thermal contact resistance according to claim 1, it is characterised in that：The heat conduction
Body is the cylinder of red copper material.
4. a kind of measurement apparatus of fixed combinating surface thermal contact resistance according to claim 1, it is characterised in that：Heat generating components
For resistance furnace.
5. a kind of measurement apparatus of fixed combinating surface thermal contact resistance according to claim 1, it is characterised in that：Hydraulic pressure exerts a force
Device is hydraulic screw rod.
6. a kind of measurement apparatus of fixed combinating surface thermal contact resistance according to claim 1, it is characterised in that：It is described heat-insulated
Sleeve includes outer insulating sleeve and interior insulating sleeve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710450615.8A CN107064214A (en) | 2017-06-15 | 2017-06-15 | A kind of measurement apparatus of fixed combinating surface thermal contact resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710450615.8A CN107064214A (en) | 2017-06-15 | 2017-06-15 | A kind of measurement apparatus of fixed combinating surface thermal contact resistance |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107490595A (en) * | 2017-09-21 | 2017-12-19 | 北京工业大学 | A kind of normal load influences the assay method and device of relation on faying face thermal contact resistance |
| CN107782762A (en) * | 2017-09-15 | 2018-03-09 | 湖北航天技术研究院总体设计所 | A kind of thermal contact resistance measurement apparatus that on-load pressure is can adjust in vacuum tank |
| CN108828003A (en) * | 2018-06-09 | 2018-11-16 | 安徽华兴车辆有限公司 | A kind of solid material thermal contact resistance measuring device and measuring method |
| CN108931551A (en) * | 2018-05-31 | 2018-12-04 | 重庆大学 | A kind of surface of solids engaging portion contact conductane measuring device |
| CN110186948A (en) * | 2019-05-14 | 2019-08-30 | 重庆大学 | A kind of bearing ring and ball thermal contact resistance measuring system and measurement method |
| CN117290979A (en) * | 2023-11-27 | 2023-12-26 | 北京精雕科技集团有限公司 | Effective contact area-based bolt-combined contact thermal resistance measurement method and device |
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| CN108931551A (en) * | 2018-05-31 | 2018-12-04 | 重庆大学 | A kind of surface of solids engaging portion contact conductane measuring device |
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| CN110186948A (en) * | 2019-05-14 | 2019-08-30 | 重庆大学 | A kind of bearing ring and ball thermal contact resistance measuring system and measurement method |
| CN117290979A (en) * | 2023-11-27 | 2023-12-26 | 北京精雕科技集团有限公司 | Effective contact area-based bolt-combined contact thermal resistance measurement method and device |
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Application publication date: 20170818 |