The crankshaft connecting rod mechanism of the generator set bears the gas pressure inside the cylinder, converts the heat energy released by the combustion of the generator set fuel into mechanical energy, converts the reciprocating linear motion of the generator set piston into the rotational motion of the crankshaft, and outputs power to the transmission device.
The crankshaft connecting rod mechanism of the generator set contains a large number of parts, which can be roughly divided into three major components: the body group, the piston connecting rod group, and the crankshaft flywheel group. The body assembly has the characteristic of being stationary when installed on the generator set, so it is also called a fixed component. The piston connecting rod group and crankshaft flywheel group of the generator set continuously engage in reciprocating linear and rotational motion during the operation of the generator set, hence they are also known as moving parts.
There are three types of structures for the crankcase of the generator set. Firstly, the crankcase and cylinder block are cast into one body; The second is that the crankcase and cylinder block are cast separately, and the two are connected by bolts; The third is that the crankcase is divided into two parts: upper and lower. The lower crankcase is made of thin steel plate or aluminum alloy, which stores engine oil and serves as a seal and protection. The upper crankcase is integrated with the cylinder system and is a complete casting, commonly referred to as the engine body.
There are three structural forms of the generator body, namely gantry type, tunnel type, and split type (general type). The characteristics of the gantry type engine block are that the main bearing seat is separated, the main shaft is disassembled from the lower part of the engine block, and the lower plane of the engine block is located below the centerline of the crankshaft. The general engine block is characterized by that the lower plane of the engine block is in the same plane as the centerline of the crankshaft. The tunnel engine block is characterized by that the main bearing seat is integral and the crankshaft is installed from the rear of the engine block.
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