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Double-shaft balancing design method of V8 type diesel engine

A design method and technology for diesel engines, applied in mechanical equipment, internal combustion engine testing, springs/shock absorbers, etc., can solve problems such as damage to instruments and equipment, excessive vibration of the entire diesel engine, loose fasteners, etc., to ensure correctness. Effect

Inactive Publication Date: 2017-12-08
JIANGSU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If no corresponding measures are taken to eliminate or attenuate it, the vibration of the diesel engine will exceed the standard, making the diesel engine unable to run safely and reliably, causing loosening or overloading of fastening joints, and causing abnormal damage to related instruments and equipment

Method used

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  • Double-shaft balancing design method of V8 type diesel engine
  • Double-shaft balancing design method of V8 type diesel engine
  • Double-shaft balancing design method of V8 type diesel engine

Examples

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Embodiment

[0028] In this embodiment, the dual-axis balance design method of the V8 diesel engine, the dual-axis balance scheme design of the diesel engine under the rated speed condition is carried out through the method of combining theoretical design and dynamic simulation, and the balance characteristics of the diesel engine are analyzed based on the virtual prototype technology. research analysis.

[0029] This example calculates the balance performance of diesel engines under two crank types (space type and planar type) and four types of cylinder angles (45°, 50°, 60° and 90°), and the calculated content includes the rotational inertia force And torque, first and second order reciprocating inertial force and moment, compare each other and choose the most suitable crank type and cylinder angle for V8 diesel engine. The calculation method of the balance performance is mainly formed by projecting and superimposing the force or moment in the horizontal and vertical directions. The deta...

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Abstract

The invention relates to a double-shaft balancing design method of a V8 type diesel engine. The double-shaft balancing design method comprises theoretical design, multi-rigid-body dynamics simulation and rigid-flexible coupling vibration simulation; the theoretical design comprises the steps of selection of air cylinder included angles and crank modes, fitting of an upsetting moment and analysis of harmonic waves and determination of balancing shaft spatial layout modes, phase angles, mass distribution, cross section shapes and parameters; a V8 type diesel engine multi-rigid-body model is built by dynamics simulation, and a double-shaft balancing effect determined by the theoretical design is verified; rigid-flexible coupling vibration simulation aims at the V8 diesel engine which is additionally provided with the double-shaft balancing design to build a diesel engine rigid-flexible coupling model, and stimulation is conducted on the vibration condition of the diesel engine which is additionally provided with a balancing device, and the balancing effect of a double-shaft balancing scheme is verified on the other hand. The double-shaft balancing design method of the V8 type diesel engine has the advantages that the method which combines the theoretical design with the dynamics simulation together is adopted, results in the stages are verified mutually, the correctness of the design scheme is ensured, and the reasonability of the design scheme and the good balancing effect can further be ensured.

Description

technical field [0001] The invention relates to a design method of a balance shaft, in particular to a double-shaft V8 diesel engine [0002] Balanced design approach. Background technique [0003] The V8 diesel engine has a large unbalanced inertial force, and the overturning moment has a large variation range in complex periodic changes. The side thrust of the piston acts on the frame through the cylinder, causing the diesel engine to vibrate, making it difficult to balance. If no corresponding measures are taken to eliminate or attenuate it, the vibration of the diesel engine will exceed the standard, making the diesel engine unable to run safely and reliably, causing loosening or overloading of fastening joints, and causing abnormal damage to related instruments and equipment. A good balance mechanism design method is the key to the development of a balance mechanism. This patent provides a method combining theoretical design and dynamic simulation to design a biaxial ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F15/24F16F15/26G01M15/12
CPCF16F15/24F16F15/264G01M15/12
Inventor 肖民钱志鹏
Owner JIANGSU UNIV OF SCI & TECH
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