Research of the Performance of a Hydraulic Actuator Based on an Acoustic Power Analysis

Abstract

The powered roof support in a mining complex protects machines and people from the harmful effects of the rockmass. The design of the powered roof support should be strictly prepared for adverse working conditions. This especially applies to the construction of the hydraulic actuator, which is designed to transfer uncontrolled load relief. The hydraulic actuators and an adequately selected safety valve determine the requirements for safe work. The study analyses the hydraulic actuators based on the signal obtained from the dynamic impact. The signal obtained from the load of the powered roof support in the bench tests allowed us to determine the opening time of the safety valve, which is not much different than the time of the pressure increase. Until now, the valve’s operation has been primarily analysed regarding pressure increase. This research was intended to determine whether introducing the sound power method for developing powered roof support research in the near future would be helpful. The sub-piston pressure increased during bench testing, generating a dynamic impact signal. The analysed results of the sound power tests in terms of their suitability for the development of standards related to powered roof support. This paper describes a new approach to research on powered roof support. Determining the acoustic power based on bench tests for the hydraulic actuator of a powered longwall support is ground-breaking research. The research results pave the way for new technologies based on acoustic information.

Sustainable Development Processes for Renewable Energy Technology II: An Overview

“…The issues of improving equipment for the production of mineral resources in order to achieve a "seamless" transition from non-renewable energy sources to renewable energy technology have been given much attention in the scientific literature, i.e., in [17][18][19]. Specifically, in the article by D. Szurgacz in this Special Issue, which is devoted to the study of the productivity factors of a hydraulic actuator in powered roof support in mines, an original approach to the analysis of acoustic power developed by a hydraulic drive under the influence of dynamic load is provided [20]. Given that under conditions of high loads and unfavorable external influences in the hydraulic actuator of the roof support, special requirements must be placed on the design of the safety valve, this forces us to look for innovative methods to ensure safe operation.…”