Open AccessDynamic characteristic analysis and fault diagnosis of load‐sensitive drive system for loaders
Author(s) -
Liu Yanhui
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8974
Subject(s) - loader , hydraulic machinery , hydraulic pump , fault (geology) , computer science , web crawler , control theory (sociology) , power (physics) , hydraulic accumulator , load rejection , process (computing) , automotive engineering , electric power system , matching (statistics) , engineering , mechanical engineering , statistics , physics , control (management) , mathematics , turbine , quantum mechanics , artificial intelligence , seismology , world wide web , geology , operating system
A certain type of crawler loader often appears flameout in unilateral steering, which makes the performance of the whole machine greatly affected. By analysing the dynamic characteristics of the load‐sensitive drive system, it is found that the hydraulic fluctuation and the power matching between the hydraulic pump and the engine are the fundamental reasons for the failure. In order to solve this problem, a simple and easy improvement scheme is designed on the premise of not affecting the engine efficiency: a suitable size damping is connected in the middle of the two load feedback lines of the drive system to solve the power matching between the engine and the hydraulic pump and reduce the hydraulic fluctuation of the system. Simulation and experimental results show that this method can effectively solve the problem of stalling in the steering process of loaders and greatly improve the dynamic performance of the system.