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Multi-cylinder diesel engine crankshaft and manufacturing method thereof

A technology for diesel engines and crankshafts, applied in the fields of multi-cylinder diesel engine crankshafts and diesel engine crankshafts, it can solve the problems that are not conducive to lubricating oil film gaps and affect the establishment of oil films, and achieve the effects of reducing the total mass, ensuring the reliability of the crankshaft, and high hardness

Active Publication Date: 2015-06-10
SINOTRUK JINAN FUQIANG POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This design ensures that the lubricating oil hole passes through the center of the journal with the least force, but this design is not conducive to the lubricating oil passing through the oil hole to the oil film gap between the bearing bushes, thus affecting the establishment of the oil film

Method used

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  • Multi-cylinder diesel engine crankshaft and manufacturing method thereof
  • Multi-cylinder diesel engine crankshaft and manufacturing method thereof
  • Multi-cylinder diesel engine crankshaft and manufacturing method thereof

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Embodiment Construction

[0032] The present invention is described in detail below in conjunction with accompanying drawing:

[0033] The crankshaft of a multi-cylinder diesel engine includes a main journal 5, a crank 8 and a connecting rod journal 6. The main journal 5 is connected with a number of parallel cranks 8, and the crank 8 and the crank 8 are connected through the connecting rod journal 6. The crank 8 is provided with a balance weight at the end far away from the center of the connecting rod journal. The balance weight is in a symmetrical arc shape, and the symmetrical center line of the balance weight is not on the same line as the axis of the crank main journal and the connecting rod journal, but forms a an acute angle.

[0034] The balance block is in a symmetrical arc shape, and the balance mass on each crank arm is different, and the mass-diameter product is distributed symmetrically or antisymmetrically, so as to ensure that the addition of all masses can make the crankshaft achieve t...

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Abstract

The invention discloses a multi-cylinder diesel engine crankshaft and a manufacturing method thereof. The multi-cylinder diesel engine crankshaft comprises a main journal, cranks and connecting rod journals, wherein the multiple cranks parallel to one another are connected to the main journal; every two adjacent cranks are connected by virtue of a connecting rod journal; the multi-cylinder diesel engine crankshaft is characterized in that a balance block is arranged at one end, which is far away from the center of the connecting rod journal, of each crank; the balance blocks are of symmetrical arcs; the symmetrical center line of the balance blocks and the axis of the crankshaft main journal and the connecting rod journals are not positioned on the same line, and form an acute angle. The balance blocks are of the symmetrical arcs, the balance mass on each crank arm is not the same, mass-radius products are in symmetrical or asymmetrical distribution, the overall balance effect of the crankshaft can be achieved when all the mass is added together, the total mass of the counterweight of the balance blocks can be effectively reduced, the internal force and the internal bending moment of the crankshaft can be minimized, namely the aim of wholly lightening an engine is achieved, and the reliability of the crankshaft can be guaranteed.

Description

technical field [0001] The invention relates to a crankshaft of a diesel engine, in particular to a crankshaft of a multi-cylinder diesel engine, and belongs to the field of mechanical manufacturing. Background technique [0002] The crankshaft converts the reciprocating motion of the piston of the diesel engine into rotational motion through the connecting rod. It is a key part for energy conversion of the diesel engine and has high machining accuracy requirements. In a traditional crankshaft design, the crankshaft and crankarms are self-balancing, and each crankshaft is the same shape. At the same time, due to the different positions of the crank throws corresponding to each cylinder of the multi-cylinder diesel engine crankshaft on the diesel engine, the balance requirements for the crank are also different. A self-balancing crankshaft that is perfectly balanced on the surface is unbalanced when actually running on a multi-cylinder diesel engine. [0003] Usually, when ...

Claims

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Application Information

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IPC IPC(8): F16C3/20F16C3/14B23P15/14
Inventor 卢永信刘宏宋振宇王慧滕启寨
Owner SINOTRUK JINAN FUQIANG POWER
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