Eight-cylinder hot air engine opposite-type driving system and crankshaft thereof

Abstract

The invention discloses an eight-cylinder hot air engine opposite-type driving system and a crankshaft thereof. The eight-cylinder hot air engine opposite-type driving system comprises the eight-cylinder hot air enginecrankshaft, an upper balance shaft and a lower balance shaft; the axes of the eight-cylinder hot air enginecrankshaft, the upper balance shaft and the lower balance shaft are parallel to one another; the eight-cylinder hot air enginecrankshaft comprises a main journal, four pairs of crank throws, a free end and an output end; each pair of the crank throws comprises two crank pinsand three crank arms, every two crank pins are distributed along the axis of the eight-cylinder hot air enginecrankshaft in sequence, and each crank pin is arranged between every two crank arms whichare arranged adjacent to each other to enable each crank pin and every two adjacently arranged crank arms to form a crank throw unit; and the phase difference of thetwo crank throw units of each pairof crank throw is 180 degrees. The eight-cylinder hot air engine opposite-type driving system and the crankshaft thereof prolong the service life of parts, and the outer size of aneight-cylinder hotair engine is reduced; and the vibration noise of theeight-cylinder hot air engine is reduced, lubrication of a bearing is facilitated, and the operation reliability and long-term operation stabilityof thehot air engine driving system are improved.

Description

technical field [0001] The invention relates to the technical field of heat engines, in particular to an opposed transmission system of an eight-cylinder heat engine and its crankshaft. Background technique [0002] The heat engine is a closed-cycle piston type and new type of external combustion engine heated by external energy. It has high cycle thermal efficiency, good torque-speed characteristics, stable operation, low vibration and noise, clean emission, and can be used for various fuels or energy sources. etc., so it has a wide range of applications and application prospects. [0003] Although the four-cylinder heat engine is the most widely used model, in order to meet the high power demand of the heat engine, the eight-cylinder heat engine is produced accordingly. The common transmission form of the four-cylinder heat engine and the eight-cylinder heat engine is the U-shaped double crankshaft. 1. There are two types of V-type single crankshaft. The double-crank U-sh...

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Problems solved by technology

The U-shape of the existing double crankshaft and the V-shape of the single crankshaft mainly balance the reciprocating inertial force and moment, rotational centrifugal force and moment by installing a balance weight on the transmission shaft. The shape and so on increase the difficulty of the design of the heat engine transmission system

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