Analysis method for high-intensity bolt strength of automobile engine flywheel
A high-strength bolt, automobile engine technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem that the crankshaft cannot run uniformly, affect the working efficiency of the engine power source, and cannot guarantee that the flywheel can store power strokes, etc. question
Pending Publication Date: 2018-04-03
BRILLIANCE AUTO
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[0003] The size of the pretightening force of the flywheel bolts and the state of the pretightening force directly affect the working efficiency of the engine power source output. If the pretightening force is too small, the friction between the flywheel and the end surface of the crankshaft will be smaller, resulting in the friction between the flywheel and the crankshaft. Relative sliding occurs, which cannot guarantee the function of the flywheel to store the power stroke, and loses the resistance to overcome the auxiliary stroke, so that the crankshaft cannot run uniformly. In severe cases, the crankshaft will break. On the contrary, if the pre-tightening force is too large, the bolt will yield Failure, eventually leading to bolt breakage, crankshaft and flywheel connection failure
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[0010] The following combination Figure 1~3 , the content of the present invention will be described in detail through specific embodiments. see figure 1 , the present invention provides an efficient and accurate analysis method for high-strength flywheel bolts, which mainly includes the following steps: determining the three-dimensional geometric parameters related to the engine and connecting rod assembly, counting engine structural information such as stroke, cylinder number, ignition information, etc., and connecting rod Relevant information of parts such as connecting rods and piston pin seats; use the Excite Designer module to establish a one-dimensional crankshaft dynamics analysis model, refer to figure 2 schematic diagram.
[0011] In the dynamic analysis model, the engine model is simulated by the Engine module; the piston model is simulated by the Piston module; the piston pin is simulated by the Piston Pin module, and the connecting rod is simulated by the Conr...
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The invention provides an analysis method for the high-intensity bolt strength of an automobile engine flywheel. The analysis method mainly comprises the following steps that: determining the relevantthree-dimensional geometric parameters of an engine and a connecting rod component and the related information of parts including a connecting system part connecting rod, a piston boss and the like,establishing a one-dimensional crankshaft kinetic analysis model, dividing a crankshaft 3D model into a sealed face mesh, and inputting parameter assemblies, including the geometric parameters, the quality, the rotational inertia and the like of the flywheel and an absorber to obtain the shm file calculation application of a rigidity matrix and a mass matrix; and inputting an engine cylinder pressure curve, and carrying out kinetic simulation analysis to obtain the maximum kinetic torsion diagram of a flywheel side at the revolving speed of 1000-6000rpm. The analysis method has the beneficialeffects that the maximum dynamic torque of each revolving speed when the engine operates can be quickly and accurately obtained, a VDI (Virtual Device Interface) standard can be imported to more comprehensively and accurately check the stress situation of the high-intensity bolt of the flywheel.
Description
technical field [0001] The invention relates to the field of automobile manufacturing, in particular to a method for analyzing the strength of high-strength bolts of automobile engine flywheels. Background technique [0002] The important connection method in the assembly of various components in the engine is the bolt connection. In order to achieve the specified output torque value of the engine, the flywheel end is firmly combined with the crankshaft end, and to prevent the relative sliding between the flywheel and the end surface of the crankshaft end, it is necessary to check the preload of the flywheel bolts. [0003] The size of the pretightening force of the flywheel bolts and the state of the pretightening force directly affect the working efficiency of the engine power source output. If the pretightening force is too small, the friction between the flywheel and the end surface of the crankshaft will be smaller, resulting in the friction between the flywheel and the...
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Login to View More IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/15Y02T90/00
Inventor 徐小彬乔鑫刘志鹏李一唐浩
Owner BRILLIANCE AUTO