Experimental study of pneumatic devices that reduce the effort on the controls

Abstract

Modern trends in the development of automotive construction involve the introduction of elements into the objects being created that ensure high performance characteristics of the product. If we consider the control elements of nodes, aggregates and systems of machines, then the main functional characteristics are ergonomic (accessibility, effort on the controls, etc.), as well as durability, good performance and stability of operation, If we consider the braking system of a tractor, then, taking into account the requirements of normative documents on the use of only pneumatic braking mechanisms on a trailer train, it seems appropriate to use a pneumatic braking system on the tractor itself, which will facilitate the coordination of braking of tractor train links [Tractor trains]. In addition, the use of pneumatic amplifiers in various systems and drives is of interest. This article presents the results of experimental studies of promising designs of a pneumatic clutch booster for tractors of the Belarus family and a three-section pneumatic brake crane for controlling the sides, designed for universal row tractors cl. 1,4–2,0. The program and methodology of experimental research, the measuring and recording equipment used, the schemes of test facilities for laboratory tests, the installation sites of sensors are presented. The conducted laboratory studies allowed us to obtain static and dynamic characteristics of the tested pneumatic devices, which allowed us to evaluate their tracking effect and performance. During the experiment, the influence of some design and operational factors on the output parameters and stability of the studied nodes was studied. Based on the results of the work, recommendations were proposed to improve the design of the units under consideration, as well as their rational installation on the tractor and connection to its pneumatic system.