The instantaneous opening speed of the relief valve spool reaches 15.7 m/s, and the hinge point between the top beam and the column is most sensitive to the hysteresis effect (impact coefficient increases by 0.63). Keywords: hydraulic support; rotary impact; dynamic response; mechanical-hydraulic...
1. Introduction Arterial hypertension is a significant risk factor for cardiovascular diseases, especially for strokes and heart attacks, and thus a major health problem in the population. In Ger- many, between one quarter and one third has known medically diagnosed high blood pressure [1–3]. ...