Thermal loading device and thermal loading method for variable acceleration environmental test

Abstract

The invention discloses a thermal loading device for a variable-accelerated-speed environment test. A heating tube is arranged in a thermal loading box, the induction end of a temperature sensor is arranged in the thermal loading box, the signal output end of the temperature sensor and the input end of the heating tube are correspondingly connected with a temperature control box, the heating tube is filled with magnesium oxide, the two ends of the heating tube are sealed with ceramics, the heating tube is mounted to the inner wall of the thermal loading box through multiple thermal-insulation clamps, multiple cooling fins are mounted on the heating tube, and tumbler connecting and supporting plates are mounted on a box opening of the thermal loading box and used for being connected with a tumbler of a centrifugal machine in a seamless mode. The invention further discloses a thermal loading method adopted by the thermal loading device for the variable-accelerated-speed environment test, and a double-temperature-zone thermal loading method or a response temperature method is adopted. According to the thermal loading device and method for the variable-accelerated-speed environment test, the heating tube is filled with magnesium oxide, and the cooling fins are mounted, so that the device has better heat dissipation performance; through the temperature control box, the temperature sensor and the heating tube, precision control over the temperature inside the thermal loading box is achieved.

Description

Technical field [0001] The invention relates to a device for a variable acceleration environment test, in particular to a thermal loading device and a thermal loading method for a variable acceleration environment test. Background technique [0002] During the flight process, the aircraft needs to accelerate, decelerate and maneuver. It is subject to variable accelerations from various directions and different magnitudes. At the same time, the temperature load experienced during the variable acceleration flight also changes greatly. For example, the temperature changes caused by different atmospheric environments constitute the aircraft during flight. The variable acceleration-temperature compound environment to be experienced. When the flying speed of the aircraft reaches or exceeds 5 times the sound travel (such as supersonic aircraft), the variable acceleration generated by the aircraft maneuver is more obvious. At the same time, the kinetic energy of the fast flying air is c...

AI Technical Summary

Problems solved by technology

This device can complete the steady-state acceleration-temperature composite environmental test assessment, but it is not suitable for temperature-acceleration environmental tests in variable acceleration environments in terms of temperature rise range, temperature and acceleration change rate, and safety. The temperature resistance of the tetrafluoroethylene heating film does not exceed 100 degrees. Therefore, the maximum temperature and the rate of temperature rise must be limited; the heating film is attached to the inner wall of the container with high-temperature glue. If you want to replace the heating film in this installation method, it is very difficult. Difficult; PTFE is a kind of plastic, which is easily deformed or even melted by mechanical force and thermal stress under variable acceleration and high temperature environment. The inside of the heating film may also be degummed due to high temperature, causing short circuit of the heating wire contained inside. , a safety accident occurred

In addition, the anti-wear performance, durable applicability and oxidation resistance of plastics are poor, which is likely to cause safety hazards

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