CN201926635U - Joint surface thermal contact resistance measuring device - Google Patents

Abstract

Translated fromChinese

一种结合面接触热阻测量装置，在真空箱的底部设置有下固定板，下固定板上设置有螺杆，螺杆的上有上固定板及加载螺栓，上固定板的下方有称重传感器，称重传感器的下方设置有加热件，加热件的外部套接有加热环，加热件的下方有上热流计，上热流计的下方设置有两个被测试件，被测试件的下方设置有下热流计，上、下热流计和被测试件三者的外部套接有隔热环，隔热环上横向插有传感器，传感器一端伸入到上述三者内部，另一端接到集线支架，集线支架与称重传感器接到处理显示单元上，下热流计的下方设置有制冷件，本实用新型通过下热流计和上热流计及被测试件上的温度数据，计算出流过两个被测试件结合面的热流量，具有简单易操作的特点。

A contact thermal resistance measuring device of joint surface, in which a lower fixing plate is arranged at the bottom of the vacuum box, a screw is arranged on the lower fixing plate, an upper fixing plate and a loading bolt are arranged on the screw, and a load cell is arranged under the upper fixing plate, There is a heating element under the load cell, and a heating ring is sleeved on the outside of the heating element. There is an upper heat flow meter under the heating element, and two test pieces are arranged under the upper heat flow meter. The heat flow meter, the upper and lower heat flow meters and the test piece are sleeved with a heat insulation ring, and a sensor is inserted horizontally on the heat insulation ring. One end of the sensor extends into the above three, and the other end is connected to the wire collection bracket. The wire-collecting bracket and the load cell are connected to the processing display unit, and a refrigeration part is arranged under the lower heat flow meter. The utility model calculates the temperature data flowing through the two heat flow meters and the upper heat flow meter and the tested piece The heat flow of the joint surface of the tested piece has the characteristics of simple and easy operation.

Description

A kind of faying face thermal contact resistance measurement mechanism

Technical field

The utility model belongs to field of measuring technique, faying face thermal contact resistance measurement mechanism under particularly a kind of vacuum and the normal temperature and pressure environment.

Background technology

Have a large amount of faying faces in complex mechanical systems such as precision machine tool, large aircraft, because their existence, the continuity of mechanical system structure is destroyed, and this influences the complete machine performance of mechanical system dramatically.The faying face thermal contact resistance is as one of faying face key property parameter, and its order of accuarcy will directly influence faying face parameter characteristic model.Because a large amount of existence of faying face on the engineering, and the thermal equilibrium and the heat that influences mechanical system transmits, so a kind of simple and easy experiment table that can accurately measure thermal contact resistance, has very strong engineering significance.It can study the pattern of faying face and contact pressure to the rule that influences of faying face thermal contact resistance, sets up the database of various faying face thermal contact resistances, and helps accurately to determine faying face characterisitic parameter model.And at present the testing table measured of faying face thermal contact resistance is very complicated, and especially the realization of loading system under the vacuum environment and refrigeration system makes the total system additional complexity.

Summary of the invention

In order to overcome the defective of above-mentioned prior art, the purpose of this utility model is to provide a kind of faying face thermal contact resistance measurement mechanism, by measuring the temperature value of test specimen and heat flow meter diverse location, can calculate the heat flux and the interface temperature drop that flow through faying face respectively, obtain thermal contact resistance then, have characteristics simple to operation.

In order to achieve the above object, the technical solution of the utility model is achieved in that

A kind of faying face thermal contact resistance measurement mechanism, comprise vacuum tank 1, be provided withbottom plate 11 in the bottom of vacuum tank 1,bottom plate 11 is provided withscrew rod 5, the upper end ofscrew rod 5 is provided with upper mountedplate 4 andloading bolt 2, the below of upper mountedplate 4 is provided with LOAD CELLS 3, the below of LOAD CELLS 3 is provided withheating member 6, the outer cover ofheating member 6 is connected toheating ring 18, the below ofheating member 6 is provided withheat flow meter 8, the below of lastheat flow meter 8 is provided with twotest specimens 9, the below oftest specimen 9 is provided with downheat flow meter 7, lastheat flow meter 8,test specimen 9 and followingheat flow meter 7 threes' outer cover is connected toheat insulation loop 16, laterally be inserted withsensor 15 on theheat insulation loop 16,sensor 15 1 ends extend intoheat flow meter 8,test specimen 9 and followingheat flow meter 7 threes' inside, the other end is connected on theline concentration support 14,line concentration support 14 is connected on the processes and displaysunit 17 by data line with LOADCELLS 3, the below of followingheat flow meter 7 is provided withcooling piece 13,cooling piece 13places refrigeration groove 12, is mixture of ice andwater 10 in therefrigeration groove 12.

Temperature data under the utility model passes through onheat flow meter 7 and lastheat flow meter 8 and thetest specimen 9 calculates the heat flux that flows through twotest specimen 9 faying faces.When loading different normal pressures, measurement mechanism of the present utility model can be to different surface in contact patterns, different normal pressure, different parameters such as testpieces material behavior under the faying face thermal contact resistance vacuum and measure under the normal temperature, and utilizes interpretation surface in contact pattern, normal pressure and the testpieces material rule that influences to thermal contact resistance.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model measuring principle synoptic diagram.

Embodiment

Below in conjunction with accompanying drawing the utility model is done and to be described in further detail.

With reference to Fig. 1, a kind of faying face thermal contact resistance measurement mechanism, comprise vacuum tank 1, be provided withbottom plate 11 in the bottom of vacuum tank 1,bottom plate 11 is provided withscrew rod 5, the upper end ofscrew rod 5 is provided with upper mountedplate 4 andloading bolt 2,2 pairs of upper mounted plates ofloading bolt 4 realize that gravity loads, the below of upper mountedplate 4 is provided with LOADCELLS 3, the below of LOAD CELLS 3 is provided withheating member 6, the outer cover ofheating member 6 is connected toheating ring 18, the below ofheating member 6 is provided withheat flow meter 8, the below of lastheat flow meter 8 is provided with twotest specimens 9, the below oftest specimen 9 is provided with downheat flow meter 7, lastheat flow meter 8,test specimen 9 and followingheat flow meter 7 threes' outer cover is connected toheat insulation loop 16, prevent that heat from flowing out to side, laterally be inserted withsensor 15 on theheat insulation loop 16,sensor 15 1 ends extend intoheat flow meter 8,test specimen 9 and followingheat flow meter 7 threes' inside, the other end is connected on theline concentration support 14,line concentration support 14 is connected on the processes and displaysunit 17 by data line with LOADCELLS 3, the below of followingheat flow meter 7 is provided withcooling piece 13, andcooling piece 13places refrigeration groove 12, is mixture of ice andwater 10 in therefrigeration groove 12.

Principle of work of the present utility model is:

One, definite environment of measuring the faying face thermal contact resistance is still to be under the normality, if measure under the vacuum environment, then to need will to be evacuated in the vacuum tank by vacuum pump under the vacuum.If under the normal temperature and pressure, then do not need to vacuumize;

Two, the pressure size of tightening extentcontrol test specimen 9 by the loading bolt on the upper mounted plate 42 is with pressure modulation expectation value in advance;

Three, close vacuum tank, vacuum tank is evacuated.Open the heating power supply switch, wait for that the temperature data of each temperature sensor is stable after, by processes and displaysunit 17 record temperature datas, deal with the work.As not needing vacuum measurement, after closing vacuum tank, do not vacuumize.

Measuring principle of the present utility model is:

When the temperature sensor temperature data on faying face formation test specimen and heat flow meter is stablized, represent that promptly the hot-fluid transmission has settled out.The measurement thermal contact resistance is defined as

Comprise two parts: the one, flow through the heat flux Q of faying face, the 2nd, faying face temperature drop Δ T.The heat flux that flows through faying face can multiply by the material heat-conduction coefficient by thermograde and obtain according to Fourier's formula that conducts heat.Because up and down the thermal conductance data of heat flow meter are known,, the temperature data by temperature sensor on it can obtain as long as calculating its vertical direction thermograde

Wherein A is a contact area, and k is a material thermal conductivity.Owing to inevitably heat dissipation occurs, the heat flux quantity that followingheat flow meter 7 and lastheat flow meter 8 are measured is different.Here get its two mean value as the heat flux that flows through the interface.Second portion, temperature drop Δ T is at the interface obtained by the temperature gap oftest specimen 9 faying faces.Utilize the Temperature Distribution on the faying face formation test specimen, make two test specimen temperature Temperature Distribution vertically up and down under same coordinate, it is fitted to straight line respectively, can there be a temperature drop at the interface in it.Its principle is illustrated in fig. 2 shown below.

Above content is to further describing that the utility model is done in conjunction with concrete preferred implementation; can not assert that embodiment of the present utility model only limits to this; for the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace, all should be considered as belonging to the utility model and determine scope of patent protection by claims of being submitted to.

Claims (1)

Translated fromChinese

1.一种结合面接触热阻测量装置，其特征在于，包括真空箱(1)，在真空箱(1)的底部设置有下固定板(11)，下固定板(11)上设置有螺杆(5)，螺杆(5)的上端设置有上固定板(4)及加载螺栓(2)，上固定板(4)的下方设置有称重传感器(3)，称重传感器(3)的下方设置有加热件(6)，加热件(6)的外部套接有加热环(18)，加热件(6)的下方设置有上热流计(8)，上热流计(8)的下方设置有两个被测试件(9)，被测试件(9)的下方设置有下热流计(7)，上热流计(8)、被测试件(9)和下热流计(7)三者的外部套接有隔热环(16)，隔热环(16)上横向插有传感器(15)，传感器(15)一端伸入到上热流计(8)、被测试件(9)和下热流计(7)三者的内部，另一端连接到集线支架(14)上，集线支架(14)与称重传感器(3)通过数据传输线连接到处理显示单元(17)上，下热流计(7)的下方设置有制冷件(13)，制冷件(13)置于制冷槽(12)中，制冷槽(12)内为冰水混合物(10)。1. A joint surface contact thermal resistance measuring device is characterized in that, comprising a vacuum box (1), the bottom of the vacuum box (1) is provided with a lower fixed plate (11), and the lower fixed plate (11) is provided with a screw rod (5), the upper end of the screw rod (5) is provided with an upper fixing plate (4) and a loading bolt (2), the lower part of the upper fixing plate (4) is provided with a load cell (3), and the lower part of the load cell (3) A heating element (6) is provided, a heating ring (18) is sleeved on the outside of the heating element (6), an upper heat flow meter (8) is arranged under the heating element (6), and an upper heat flow meter (8) is arranged below the upper heat flow meter (8). Two tested pieces (9), the lower part of the tested piece (9) is provided with a lower heat flow meter (7), and the outer parts of the upper heat flow meter (8), the tested piece (9) and the lower heat flow meter (7) A heat insulating ring (16) is sleeved, and a sensor (15) is inserted horizontally on the heat insulating ring (16), and one end of the sensor (15) extends into the upper heat flow meter (8), the test piece (9) and the lower heat flow meter (7) inside of the three, the other end is connected to the wire-collecting bracket (14), the wire-gathering bracket (14) and the load cell (3) are connected to the processing display unit (17) by the data transmission line, and the lower heat flow meter ( 7) is provided with a refrigerating part (13) below, and the refrigerating part (13) is placed in the refrigerating tank (12), and the ice-water mixture (10) is in the refrigerating tank (12).

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