Electric drive bridge oil duct flow distribution optimization method and system based on simulation technology

By constructing a CFD simulation model and a one-dimensional pipeline analysis model, and combining it with a genetic algorithm to optimize the injector diameter, the flow distribution problem in the electric drive axle lubrication oil channel was solved, and efficient and accurate flow evaluation and optimization were achieved, thereby improving design efficiency and vehicle performance.

CN120688402APending Publication Date: 2025-09-23JIANGSU GUOINNOVATION ENERGY COMMERCIAL VEHICLE INNOVATION TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510848151.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-24
Publication Date
2025-09-23

AI Technical Summary

Technical Problem

In the existing technology of electric drive axle lubrication oil channel design, flow distribution is difficult to accurately predict and control, resulting in insufficient or excessive lubrication in some parts, affecting the performance and reliability of the entire vehicle, and the design is inefficient and costly.

Method used

A simulation-based approach was used to construct a CFD simulation model and a one-dimensional pipeline analysis model. The injector diameter was optimized using a genetic algorithm. Simulation accuracy was ensured through grid independence verification, and efficient flow evaluation and optimization were achieved during the design phase.

Benefits of technology

Accurate flow distribution prediction was achieved during the design phase, which improved design efficiency and accuracy, reduced computing resource consumption, shortened the development cycle, and ensured the high performance and reliability of the electric drive axle.

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Abstract

The invention discloses an electric drive bridge oil duct flow distribution optimization method and system based on a simulation technology, and belongs to the technical field of electric drive bridge lubricating oil duct design. The method comprises the steps that a mathematical model of an electric drive bridge lubricating oil duct and the target flow of each oil injection opening are obtained; performing gridding processing on the mathematical model, constructing a CFD simulation model, and calculating the simulation flow of each oil injection port; establishing a one-dimensional pipeline analysis model, and comparing a calculation result with a fluid dynamics simulation result to confirm the effectiveness of the one-dimensional model; setting a variable range by taking the pipe diameter of the oil injection port as an optimization variable, and performing multi-round optimization on the one-dimensional model by adopting a genetic algorithm to obtain optimization parameters meeting design requirements; reconstructing an oil duct model according to an optimization result, and performing designability verification through simulation; according to the method, lubricating oil flow distribution can be efficiently evaluated and optimized in the design stage, the optimization precision is improved, the development period is shortened, and the test cost is reduced.
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