Design method of widened circulating circle hydraulic retarder

Abstract

The invention discloses a design method of a widened circulating circle hydraulic retarder. The design method comprises the steps that in the first step, based on a three dimensional integrated emulation technique, parameterization automatic modeling and simulating calculation of a widened circulating circle hydraulic retarder are achieved; in the second step, comparisons are made between distributions of the velocity field, the pressure field, and the turbulent kinetic energy dissipation rate of an internal flow passage of the hydraulic retarder with different aspect ratios; in the third step, analyses are conducted on the braking torque with different aspect ratios. The widened circulating circle hydraulic retarder through the building of a three dimensional integrated emulation platform achieves the automatic model building and simulation calculation of the parameterized hydraulic retarder based on the solution of the CFD; contrastive analyses of the internal flow field show that the speed of the internal flow field, the pressure and the dissipation rate of the turbulent kinetic energy are all lowered following the decrease in the aspect ratios on the value distribution; the braking torque is lowered following the decrease in the aspect ratios, the hydraulic retarder with small aspect ratios can effectively reduce the axial direction structure space.

Description

Technical field [0001] The invention relates to a design method of a reducer, in particular to a design method of a variable-width circulating circular hydraulic reducer, and belongs to the technical field of reduction products. Background technique [0002] With the increase in the power density of the vehicle transmission system, the size and space requirements of the vehicle hydraulic components are also stricter. In the prior art, more in-depth research has been done in the design and simulation analysis of the hydraulic torque converter cycle circle. , The three-dimensional flow field prediction and comparative analysis of the performance of the hydraulic torque converter with different circular round to flat ratios have effectively improved the power density of the hydraulic torque converter; and the hydraulic torque converter used in the auxiliary braking of high-speed and heavy-duty vehicles In the field of force reducer design, through modeling and simulation of differen...

AI Technical Summary

Problems solved by technology

[0002] With the increase of the power density of the vehicle transmission system, the size and space requirements for the hydraulic components of the vehicle are also more stringent. In the prior art, more in-depth research has been done on the flat design and simulation analysis of the hydraulic torque converter cycle. , the three-dimensional flow field prediction and comparative analysis on the performance of hydraulic torque converters with different cycle-to-flat ratios have effectively improved the power density of the hydraulic torque converter; In the field of force reducer design, by modeling and simulating hydraulic retarders of different circular circle types, the influence of circular circle shape on braking performance has been explored, but it has failed to reduce the axial size and Carry out in-depth research on improving the power density; the shape of the circular circle of the hydraulic reducer is various, and the design method is often referred to the design method of the circular circle of the hydraulic components such as the hydraulic torque converter and the hydraulic coupling; The reducer generally adopts an oblong circular circle with smooth transition, and the streamline design of the circular circle is spliced ​​by three arcs. There is no theoretical limit to the size of the axial occupied space, but an empirical formula is used to constrain it, and the empirical formula There is a coupling relationship between the width value B of the large diameter D1 and the small diameter D2, resulting in a low utilization rate of the axial space design