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概述在溢流阀的静态特性中,启闭特性是一项主要指标。启闭特性是指溢流阀的开启与闭合特性。开启特性是以开启压力与额定压力的百分比表示;闭合特性则以闭合压力与额定压力的百分比表示。百分比越高,则意味着溢流阀在不同溢流量下,维持液压系统压力恒定的能力越强。其试验系统见图1,图中定量泵的流量为阀的额定流量。油泵启动之前,先将溢流阀2及被试阀4松开。油泵启动后,拧紧溢流阀2,调节被试阀4至额定压力P_max=63公斤力/厘米~2,并锁紧其调节手柄。然后慢慢松开溢流阀2的手柄,直到被试阀4的溢流量减少到额定流量的1
Overview The open-close feature is a key indicator of the static characteristics of a relief valve. Opening and closing characteristics refers to the opening and closing relief valve characteristics. The opening characteristic is expressed as a percentage of the opening pressure to the rated pressure and the closing characteristic is expressed as a percentage of the closing pressure to the rated pressure. The higher the percentage, the more the relief valve can maintain the pressure of the hydraulic system under different overflow. The test system shown in Figure 1, the figure quantitative pump flow rate of the valve rated flow. Before starting the pump, relieve the relief valve 2 and the test valve 4 first. After starting the pump, tighten the relief valve 2, adjust the test valve 4 to the rated pressure P_max = 63 kgf / cm ~ 2, and lock its adjustment handle. Then slowly release the handle of the relief valve 2 until the relief of the test valve 4 is reduced to 1 of the rated flow