Experimental Analysis of Slide Throttle Valve Dynamics

The authors analyze the control circuit of the work process-related parameters of a hydraulic impactor with the piston retention before the back stroke phase. Retention is implemented via the throttle control of pressure in the hydraulic cell of the slide valve. The physical model of such hydraulic impactor is tested, and its energy characteristics are determined. The tests included re-tuning of throttles and slide homing spring, and variation in fluid flow rate. The article presents oscillograms of the hydraulic impactor dynamics and the slide performance versus throttle parameters, fluid flow rate and the spring pre-tension. The curves of the hydraulic impactor energy, retention pressure and fluid flow rate illustrate the energy adjustability using the proposed performance control circuit. The oscillograms of the slide motion during its work cycle are plotted, the features and shortages of the process are determined. The proposed design of the throttle valve provides the steady-state performance of hydraulic impactors.