Design method of large-torque composite transmission shaft structure

Abstract

The invention discloses a design method of a large-torque composite transmission shaft structure, and belongs to the field of design of a power transmission structure member. The design method comprises the following steps: selecting a composite system and a metal material; acquiring an equivalent elastic modulus E and an equivalent shear modulus G of a transmission shaft; determining the size of a minimum structure through formula computing; verifying according to the conditions that Xt<0.627> is more than T / Wt and [theta] is more than theta; using finite element software ANSYS to implement structure analysis and stacking-sequence optimization on a shaft body; verifying stacking-sequence optimization; analyzing the whole structure of the shaft body; checking whether the conditions are met: the bolt stress is less than [sigama0] and the contact stress is less than Xt / 2; and storing a stacking-sequence combination and connection mode. The structure is in a cylindrical hollow shape and is formed by connecting metal flanges at the two ends and the hollow composite shaft body; the design method does not need a solid model, the analysis process is economic and fast, the degree of freedom and the flexibility are achieved, the design method is simple and is easy to operate, the development cycle of a product is shortened by more than 50%, the product cost is reduced by more than 20%, and the utilization ratio of the composite structure is improved by more than 80%.

Description

technical field [0001] The invention relates to a design method of a drive shaft structure, in particular to a design method of a large-torque composite material drive shaft structure, and belongs to the field of power transmission structural parts design. Background technique [0002] Composite materials have become the material of choice for lightweight industrial products due to their excellent properties such as light weight, high strength, corrosion resistance, fatigue resistance, and designability. In industries such as aerospace, transportation, petrochemical, and environmental protection and anticorrosion, drive shafts are important power transmission equipment. [0003] Compared with the traditional metal transmission shaft, the composite material transmission shaft has the characteristics of light weight, the product of the same specification can reduce the weight by more than 50%, high critical speed, low noise, and the structure is gradually destroyed. In practi...

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Problems solved by technology

[0008] In order to solve the defects of the existing high-torque composite material transmission shaft, such as complex structure and inability to fully utilize the material potential, long design cycle and unreasonable size, the purpose of this invention is to propose a high-torque torque converter that combines formula calculation with finite element numerical analysis. Design method of composite transmission shaft structure

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