基于制动软管新国标的膨胀量自动测试平台设计

Design of Automatic Expansion Test Platform Based on New National Standard of Brake Hose

制动软管膨胀量的大小直接影响汽车制动性能的可靠性与灵敏性。本文针对目前制动软管膨胀量检测台操作复杂、自动化程度低等问题,设计了一种适用于常见制动软管的膨胀量自动化检测平台。该平台可以实现一键完成装置密封性验证、待测压力系统膨胀量标定、制动软管膨胀量检测等功能,也可根据GB16897-2022《制动软管的结构、性能要求及试验方法》标准,完成对制动软管低、中、高三种不同测试压力的膨胀量检测,根据客户的不同需求,来完成不同软管和不同试验压力的自动化检测。为了验证检测平台的特性,本文随机抽取了三批次的样品进行制动软管新国标所规定压力下膨胀量试验,相对误差在0.02 mL/m以内,试验结果表明,本平台可以满足制动软管新国标膨胀量的检测需求,在可以实现膨胀量自动化检测的基础上,能够为制动软管膨胀量检测提供参考和依据。

The expansion amount of brake hose directly affects the reliability and sensitivity of automobile braking performance. Aiming at the problems of complex operation and low degree of automation, this paper designs an automatic testing platform for the expansion of common brake hoses. The platform can realize the functions of one-click sealing verification of the device, expansion calibration of the pressure system to be tested, expansion detection of the brake hose, etc. It can also complete the expansion detection of the brake hose under low, medium and three different test pressures according to the standard GB16897-2022 “Structure, Performance Requirements and Test Methods of the Brake Hose”. Complete the automatic detection of different hoses and different test pressures according to the different needs of customers. In order to verify the characteristics of the testing platform, this paper randomly selected three batches of samples for the expansion test of the brake hose under the pressure specified in the new national standard, and the relative error was within 0.02 mL/m. The test results showed that the platform could meet the testing requirements of the new national standard for the expansion of the brake hose. It can provide reference and basis for brake hose expansion measurement.