Contact thermal resistance measuring device with adjustable loading pressures in vacuum vessel

Abstract

The invention discloses a contact thermal resistance measuring device with adjustable loading pressures in a vacuum vessel. The contact thermal resistance measuring device comprises the vacuum vessel,a test system and a data acquisition system. The test system comprises a test platform, a heating unit, a cooling unit and a pressurizing unit; the pressurizing unit comprises a pressure sensor, a lead screw pressurizing device and a driving motor. The contact thermal resistance measuring device has the advantages that screws can be driven by the motor to rotate, contact pressures of test piecescan be changed, manual screw rotation can be replaced, accordingly, a series of operation of vacuum vessel re-pressing, manual screw rotation, vacuumizing and the like required in each test can be omitted, test processes can be simplified to a great extent, and the test time can be shortened to a great extent; feedback compensation further can be carried out on pressure deviation due to temperature change, and accordingly the test precision can be improved.

Description

technical field [0001] The invention relates to the thermal control design of a spacecraft, in particular to a contact thermal resistance measuring device capable of adjusting loading pressure in a vacuum vessel. Background technique [0002] The spacecraft thermal control is a system that controls the heat exchange process between the interior of the spacecraft and the space environment, so that the spacecraft is always within a suitable temperature range. The performance and reliability of this system directly affect the working status and life of the entire spacecraft, so it can be said to be an indispensable technical support system for spacecraft. The thermal control design of spacecraft relies on thermal analysis calculations and ground thermal simulation experiments. In addition to a series of thermal performance parameters of materials and surfaces, thermal analysis calculations also involve some non-thermal physical parameters, such as the relationship between solid...

AI Technical Summary

Problems solved by technology

Generally, the physical properties of materials and surface optical characteristic parameters can generally be obtained by consulting the data, while the contact thermal resistance is usually only obtained through experimental measurements due to the influence of various factors such as the state of the contact surface, contact pressure, temperature, and connection method.

[0003] During the contact thermal resistance measurement test, the main body of the measuring device is often located in a vacuum container, which makes it difficult for the test implementer to change the contact pressure at any time during the test

Images