| The brake is to produce braking torque, to impede the movement of the vehicle movement or trend components. At present, the high speed and heavy load machinery(multi tracked vehicle) with friction disc brake. The braking torque is generated by the friction between the fixed element and the rotating element working surface.The friction disc brake is divided into a single disc and multi disc brake. In recent years, the multiple disk brake is widely used in engineering field. Compared with traditional caliper disc brake, the multiple brake has the advantages of simple structure, convenient operation and control, and small occupied space. brake performance is stable, wear resistance, good heat dissipation; instantaneous brake low temperature rise, this property variant convenient, etc. But there are still shortcomings, in the braking process, the pressure distribution of the friction disk is not uniform, lead to higher frequency of replacement of friction disk, low service life of brake; ball groove wear serious, resulting in compression efficiency is low, serious loss of brake pressure; the supporting body scallop wear serous, large vibration noise, lower stability and ultimately makes the brake failure. In order to enable multiple disc brake can better adapt to the heavy load, high speed and bad environment conditions, the optimizing the marble groove type can enhance the billiard compression efficiency has become focus of research on multiple disc brake.This topic using CAE Technology on the design of the three marble-marble disk pressure mechanism for compression efficiency and contact wear analysis; at the same time two kinds of the typical pressure mechanism supporting structure design scheme for pressurized stress distribution, and combined with the test to verify the correctness of the simulation method. Under the premise of marble-marble disk pressure mechanism of compression efficiency, reduce pressure loss, increase the bearing capacity of marble-marble disk pressure mechanism, relieve repeated braking abrasion of the marble slot; and reduce external tooth wear of supporting structure cogging, prolong the service life of the brake machine. We designed three kinds of groove scheme by changing the groove radius and angle of the marble slot, the three scheme marble-marble disk pressure mechanism using with analysis of theory and simulation research method, comparison of three schemes pressure mechanism of pressure efficiency and pressure marble and marble disc contact force, and the pressure mechanism for pressurizing process contact wear through the finite element analysis software Workbench ANSYS, on a rotating disk, and disk brake marble contact between the maximum stress and strain during exercise, determine the wear area; at the same time for the two kinds of typical pressure mechanism supporting structure scheme contact pressure research; the marble-marble disk pressure mechanism and the support structure design scheme is determined. Finally the complete brake for pressure test research, through static load and inertial loading test, simulation results are given to verify the correctness of, according to the simulation data and test data, under the premise of ensuring the compression efficiency and prolong the service life of the disc brake.In this paper, the multiple disc brake marble-marble disk pressure mechanism of marble disc groove structure and typical support structure of simulation analysis and experimental verification. Through the comparison analysis of the design of simulation results, it is concluded that the marble disc groove radius for R12.9mm, marble groove angle for 16 degrees of design scheme, pressure mechanism for pressurizing effect is the best; the typical supporting structure comprises an upper cover and a supporting body 2 assembly of the maximum contact stress and stain of small, strong anti abrasion ability. And through physical experiment, the correctness of simulation results and the feasibility of simulation analysis method are verified. |
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