Reciprocating motion simulation mechanism with variable crank radius

Abstract

The invention relates to a reciprocating motion simulation mechanism with variable crank radiuses, and belongs to the internal combustion engine reciprocating motion simulation mechanism field; the reciprocating motion simulation mechanism comprises the following units: a crank length adjusting device and a variable crank link mechanism used for realizing reciprocating motions and adjusting the crank length; a top rod with a mounting platform and used for copying small-end of connecting rod motion rules to a test piece mounting platform; a machine frame with a top rod guiding mechanism and used for support each member; a power unit including a servo motor and matching equipment and used for providing power. The reciprocating motion simulation mechanism can use a motor to drive the variablecrank link mechanism to move, thus finally driving the top rod mechanism to make up-down reciprocating motions; the reciprocating motion simulation mechanism is high in simulation level, strong in versatility, can dynamically simulate high speed reciprocating motions in the internal combustion engine, thus providing basis for internal combustion engine piston correlation researches.

Description

technical field [0001] The invention relates to a reciprocating motion simulation mechanism with variable crank radius, belonging to the field of reciprocating motion simulation mechanisms of internal combustion engines. Background technique [0002] With the continuous increase of the internal combustion engine cylinder explosion pressure and power-up in recent years, the thermal load and mechanical load on the piston of the internal combustion engine have greatly increased. In order to prevent the failure of the piston and ensure the reliability and durability of the piston and the diesel engine, the maximum temperature of the piston must be controlled below the allowable value. Therefore, it is necessary to effectively cool the piston, and the cooling method widely used on high-load pistons is the forced oscillation cooling of the internal cooling oil passage. Whether measuring the temperature distribution of the piston or studying the flow and heat transfer of the inter...

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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; the guide rail used by the reciprocating mechanism makes it difficult to arrange other experimental auxiliary devices, such as the difficulty in the arrangement of the oil collection device during oil injection cooling, which makes the oil splash around at the oil inlet. In addition, the 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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