An internal combustion engine reciprocating oscillation heat transfer simulation test device and test method

Abstract

The invention relates to an internal combustion engine reciprocating oscillation heat transfer simulation test device and test method, and belongs to the internal combustion engine piston test technical field; the internal combustion engine reciprocating oscillation heat transfer simulation test device comprises a main body oscillation mechanism, a power system, an oil supply system and a residualoil collection system, a control and measuring system, and a piston heating system; the main body oscillation mechanism comprises a frame and a crank length adjusting device; the power system comprises a servo motor device; the oil supply system aims at the atomizer in the inlet of an inner-cooling oil pocket cooling piston test piece, and injects machine oil to an oil duct transparency model; the residual oil collection system finally gathers the machine oil; the control and measuring system measures and controls the rotating speed and the oil injection pressure of the servo motor device; the piston heating system heats the inner-cooling oil pocket cooling piston test piece at a constant temperature through a resistance wire. The test method and device are high in simulation precision, strong in versatility, can measure the temperature in the machine oil inlet and outlet, can directly obtain the oil pocket wall surface heat transfer coefficient, and can measure the atomizer performance, thus providing basis for piston optimization design.

Description

technical field [0001] The invention relates to an internal combustion engine reciprocating vibration heat transfer simulation test device and a test method thereof, belonging to the technical field of internal combustion engine piston tests. Background technique [0002] With the continuous increase of the explosion pressure and liter power in the diesel engine cylinder in recent years, the thermal load and mechanical load on the piston of the diesel engine have increased greatly. In order to prevent piston failure and ensure the reliability and durability of piston and diesel engine, the maximum temperature of piston must be controlled below the allowable value, so effective cooling of piston is required. At present, the cooling method that is widely used on high-load pistons is the forced oscillation cooling of the internal cooling oil passage. [0003] The forced oscillation cooling of the internal cooling oil passage is cast into the oil passage inside the piston ring ...

AI Technical Summary

Problems solved by technology

[0005] However, the crank radius of this device cannot be adjusted, and its versatility is small; more importantly, this device can only use the outlet oil temperature to indirectly evaluate the heat transfer effect of the oil chamber, and cannot directly investigate the vibration and heat transfer of the cooling oil chamber in the piston, that is, it cannot pass through the wall Oil cavity heat transfer coefficient to evaluate cooling effect

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