Crankshaft assembly and engine

Abstract

The invention discloses a crankshaft assembly and an engine, and belongs to the technical field of crankshafts. The crankshaft assembly comprises a crankshaft body, two threaded flanges, a first gear,a second gear and a torsional vibration damper; the two ends of the crankshaft body are each provided with an external thread section, and the thread screwing-in direction of the external thread sections is opposite to the rotating direction of the crankshaft body; the two threaded flanges are in threaded connection with the two external threaded sections respectively; the first gear sleeves theouter side of one end of the crankshaft body and is fixedly connected with the crankshaft body; the second gear sleeves the outer side of one threaded flange and is fixedly connected with the threadedflange; the second gear and the first gear are located at the two ends of the crankshaft body respectively; and the torsional vibration damper is fixed on one side of the second gear. The front end and the rear end of the crankshaft body output power or transmit torque through threaded flange structures, the two ends can output high power, no design change needs to be made, and the universality of engine design is significantly improved.

Description

technical field [0001] The invention relates to the technical field of crankshafts, in particular to a crankshaft assembly and an engine. Background technique [0002] The crankshaft is the key power output part of the engine. All the parts connected to the crankshaft are important moving parts. Whether the connection form is reliable and easy to disassemble and assemble is directly related to the stable and reliable operation of the entire engine. [0003] Generally, the crankshaft power output connection structure of the high-power marine diesel engine / gas engine is flange structure + bolt connection or cone interference connection, but the machining accuracy of the cone interference connection is very high, and it is not easy to assemble and disassemble multiple times. Special disassembly tool; flange structure + bolt connection, the structure difference between the front and rear ends of the crankshaft is relatively large, and the flexibility and versatility are poor. If...

AI Technical Summary

Problems solved by technology

[0003] Generally, the crankshaft power output connection structure of the high-power marine diesel engine / gas engine is flange structure + bolt connection or cone interference connection, but the machining accuracy of the cone interference connection is very high, and it is not easy to assemble and disassemble multiple times. Special disassembly tool; flange structure + bolt connection, the structure difference between the front and rear ends of the crankshaft is relatively large, and the flexibility and versatility are poor. If the power output of the rear end is changed to the power output of the front end, the structure of the front and rear ends of the crankshaft needs to be greatly adjusted.

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