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Spiral bevel gear long-life drive fatigue reliability design method based on grinding and heat treatment

A technology of a spiral bevel gear and a design method, which is applied in the direction of electrical digital data processing, computer-aided design, design optimization/simulation, etc. Simple to use effects

Active Publication Date: 2017-03-15
BEIHANG UNIV
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: aiming at the design of the long-life fatigue reliability of the spiral bevel gear under given complex working conditions, comprehensively considering the distribution law of the grinding and heat treatment process parameters of the spiral bevel gear in the actual processing process , the distribution law of properties such as tooth surface roughness, residual stress, tooth surface hardness and carburizing depth after processing, the distribution law of each parameter of the calculation formula of fatigue contact and fatigue bending strength and stress of spiral bevel gears, and the establishment of Monte Carlo method The reliability calculation program of spiral bevel gear under multiple failure modes provides a design method for long-life transmission fatigue reliability of spiral bevel gear based on grinding and heat treatment for the life design and prediction of gear transmission system, which effectively reduces the The difficulty and cost brought about by the design of long-life transmission fatigue reliability

Method used

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  • Spiral bevel gear long-life drive fatigue reliability design method based on grinding and heat treatment
  • Spiral bevel gear long-life drive fatigue reliability design method based on grinding and heat treatment
  • Spiral bevel gear long-life drive fatigue reliability design method based on grinding and heat treatment

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[0073]The number of teeth on the small wheel is 26, the number of teeth on the large wheel is 31, the modulus of the big end is 8.654mm, the tooth width is 57mm, the midpoint helix angle is 35°, the pressure angle is 20°, the transmission power is 1051KW, the input speed is 2200r / min, the service life is 500h, and the accuracy level is 6 Grade, the surface roughness of the small wheel is 0.8, the surface roughness of the large wheel is 0.8, and the viscosity of the lubricating oil at 40°C is 177.2mm 2 / s, the gear material is carburized and quenched carburized steel, the material hardness is HRC59, the tensile limit is 1180MPa, the contact fatigue limit is 1500MPa, the bending fatigue limit is 480Mpa, and the material density is 7.88E-6kg / mm 3 , elastic modulus 2.07E+5MPa, Poisson's ratio 0.3.

[0074] Step (1) study the influence law of grinding process parameters on tooth surface roughness and residual stress;

[0075] Taking the study of the influence of grinding process p...

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Abstract

The invention provides a spiral bevel gear long-life drive fatigue reliability design method based on grinding and heat treatment. The method includes the steps that 1, influence laws of grinding process parameters on gear surface roughness and residual stress are studied; 2, influence laws of heat treatment process parameters on gear surface hardness and depth of carburizing are studied; 3, influence laws of the gear surface roughness, the residual stress, the gear surface hardness and the depth of carburizing on all parameters in a spiral bevel gear fatigue contact and fatigue bending strength and stress calculation formula are studied; 4, influence laws of the grinding and treatment process parameters on all the parameters in the spiral bevel gear fatigue contact and fatigue bending strength and stress calculation formula are obtained; 5, distribution laws of the heat grinding and treatment process parameters are studied; 6, a reliability calculation program under Monte Carlo method spiral bevel gear multiple failure modes is compiled, and the grinding and treatment process parameters serve as input for spiral bevel gear reliability calculation. The spiral bevel gear long-life drive fatigue reliability design method has important significance in practical application of gears.

Description

technical field [0001] The invention relates to a design method for long-life transmission fatigue reliability of spiral bevel gears based on grinding and heat treatment, and is especially suitable for calculation and analysis of long-life transmission reliability of spiral bevel gears under complex working conditions. Background technique [0002] The aviation spiral bevel gear is the most important, the most complex and the weakest power element in the main reduction transmission system of the helicopter, which is different from other commonly used spur gears. It often works under the conditions of high speed, heavy load, high temperature, and volume and weight limitations. The working conditions are harsh, the load spectrum changes complex, and the fatigue stress environment and failure modes are complex. The existing processing technology can realize the macroscopic geometric dimension requirements stipulated in the drawing, but it cannot guarantee the inherent physical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/04
Inventor 王延忠唐文刘旸张炜
Owner BEIHANG UNIV
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