A kind of piston temperature field simulation test device and test method

Abstract

The invention provides a piston temperature field simulation test device. The device comprises cooling equipment, a thermocouple temperature acquiring machine, a piston, an induction heater and high-frequency induction heating equipment; the induction heater can heat the head part of the piston, meanwhile, the piston is fixed into the cooling equipment, the cooling equipment is provided with a plurality of air cavities which are used for cooling the areas with the piston feature points, the cooling capability of the cooling equipment can be controlled by adjusting an electric air volume adjusting valve, and accordingly a needed piston temperature field module is obtained. The top face of the piston and the induction heater are maintained at the optimal induction heating distance through transverse and longitudinal movement of the cooling equipment, and maximum heat current input is ensured. Corresponding temperature measuring points are arranged in the piston feature areas, and temperature acquiring information is monitored by the thermocouple temperature acquiring machine. The test method adopts a thermocouple method to test the temperature field of the piston. The piston temperature field simulation test device and the test method have the advantages that the heat current is input stably, the position of the piston is adjusted, the heat current distribution module of the piston can be precisely simulated, and multi-point measuring can be achieved.

Description

technical field [0001] The invention relates to the technical field of pistons of engines, in particular to a piston temperature field simulation test device and method using electromagnetic induction heating as a heat source. Background technique [0002] High power density diesel engine is the main development direction of vehicle power plant, and the improvement of power density is often achieved mainly by improving combustion intensity, which will be accompanied by a significant increase in combustion pressure and average combustion temperature, especially when the heat load of the piston increases. With the continuous improvement of density and rotational speed, the maximum temperature of the piston head position is 350-400℃, and the maximum burst pressure is more than 22MPa, which will inevitably lead to extreme deterioration of the working conditions of the piston and other parts related to thermal load, resulting in the piston's failure. The failure of the piston is ...

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Problems solved by technology

However, this heating method has many inconveniences such as difficult heat distribution control and short fuel replacement cycle.

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