An oscillating flow simulation device and test method for internal combustion engine piston internal cooling oil passage

Abstract

The invention relates to an internal combustion engine piston internal cold oil channel oscillation flow simulation device and a test method thereof, and belongs to the technical field of internal combustion engine piston test. The device comprises a main oscillation mechanism, a power system, an oil supply and residual oil collection system and a control and measurement system. The main oscillation mechanism comprises a variable crank connecting rod mechanism, an ejecting rod, an oil channel transparent model and a rack comprising an ejecting rod guide mechanism. The power system comprises aservo motor device. The oil supply system is aligned with the oil injection nozzle of the inlet of the oil channel transparent model to inject engine oil to the oil channel transparent model. The residual oil collection system finally collects the engine oil. The control and measurement system measures and controls the rotating speed of the servo motor device and the oil injection pressure and records the engine oil flow condition and other data through high-speed photographing equipment. The device is high in simulation precision and high in universality and can dynamically simulate the engine oil oscillation flow distribution of the cold oil channel in the piston and can measure the oil injection performance of the oil injection nozzle so as to provide the basis for piston optimization design.

Description

technical field [0001] The invention relates to an oscillating flow simulation device and a test method for an internal cooling oil channel of an internal combustion engine piston, 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 t...

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Problems solved by technology

[0005] However, the crank radius of this device cannot be adjusted steplessly, and its versatility is small; due to the guide rail used by the reciprocating mechanism, it is difficult to collect the oil, and at the same time, the oil splashes around at the oil inlet and cannot be collected; the oil passage model is small, resulting in low observation accuracy; In addition, this device does not consider the lubrication of guide rails and high-speed reciprocating mechanisms, nor does it consider the vibration problem caused by high-speed dynamic imbalance

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