# Optimization of mechanical gear design

Because the mechanical operation is mostly heavy load, medium and low speed transmission, most of them start frequently and often bear impact load, so it is necessary to carry out industrial test on the existing mechanical equipment. Considering the bearing and gear bearing pressure and load. In mining production,...

# Material selection and design optimization of mechanical gear

Gear is a kind of mechanical element with continuous meshing transmission of motion and power on the rim, which plays a key role in mechanical appliances. Under normal working condition, gear can realize transmission and other functions. Gear transmission device is the most widely used and stable mechanism and...

# Vehicle test verification of transmission gear based on optimal modification design

In order to further verify the effectiveness of this modification method, the optimized gear is assembled on the transmission for real vehicle test, and the sound pressure level is measured at the driver’s position by using the sound pressure acquisition device, and the sound pressure level at the driver’s...

# Transmission gear model based on optimal modification design

Taking the gear transmission mechanism of a five speed transmission as the research object, the gear transmission mechanism model of the research object is established by using the gear analysis and optimization software romax designer, as shown in the figure. The transmission gear transmission mechanism studied has an input...

# Comparison of gear design results based on EHL central stress formula and Hertz stress formula

1 Influence of speed The main parameters are as follows: helix angle β = 8.11 °, η 0 = 0.15 PA · s, α = 20 °, μ = 2.52, Ze = 189.8 mpa1 / 2, = 800 MPa, k = 1.5. The diameter required for the...

# Hertz formula and design formula of cylindrical gear based on Hertz stress

1 Hertz formula The formula of maximum Hertz contact stress is as follows: Where, σ h is the maximum Hertz contact stress, MPa; W is the calculated load per unit length, N / mm; e ‘is the comprehensive elastic modulus, MPa; R is the comprehensive radius of curvature, mm....

# Case test of non Hertz contact gear design theory

The results show that the EHL center stress design results are very close to those based on Hertz theory, which further shows that EHL center stress can be used as the theoretical basis for gear contact fatigue strength design like Hertz stress. However, the calculation results of EHL center...

# Case test of non Hertz contact gear design

The dividing circle diameter of driving wheel of locomotive traction gear is 324 mm, transmission ratio μ = 2.59, tooth width coefficient diameter d = 0.53. Through calculation, the torque T1 = 4 168 030 n · mm can be obtained, and the elastic influence coefficient Ze = 189.8...

# Papers on non Hertz contact gear design

There are a lot of literatures about EHL Analysis of gear transmission, but the research on the combination of EHL and gear strength design is very few. Xiong Wenxiu et al. Optimized the gear transmission according to the contact strength, bending strength and EHL requirements, and took the minimum...

# Design method of non Hertz contact gear

Based on the EHL theory, a new gear design theory and method non Hertz contact gear design theory and method is proposed. The cylindrical gear design formula based on the new method is given. The new design theory and method are tested by a large number of engineering examples...