whxxdzbf武汉星兴达液压气动设备有限公司为您提供油泵型号
低阀温故障：膨胀阀出口温度反映的是蒸发温度，是影响换热的一个因素，一般它与冷媒水出水温度差5.~6.℃。当发生低阀温故障时，压缩机会停机，当阀温回升后，自动恢复运行，保护值为-2.℃。低阀温故障原因如下：制冷剂少量泄漏，一般表现为低阀温故障而不是低压故障；膨胀阀堵塞或开启度太小，系统不干净；冷媒水流量不足或蒸发器堵塞；电气故障引起的误报，如阀温线接触不良。压缩机过热故障：压缩机马达绕组内嵌有热敏电阻，阻值一般为1k。
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在q=65MPa时,随着粗糙度等级的越来越高,渗透量迅速减小,也就是说在q4MPa时,在同样一个渗漏量等级,粗糙度愈高所需要的q愈小,其轴向力越小真空截止阀。但对于s9MPa密封副材料,在用于3MPa等级的高压阀时,除了高压截止阀从线弹性断裂力学观点出发,[]从强度要求考虑,Ra.5m以上,还要从密封机理上考虑。因此,对于s为9MPa的高压截止阀用密封副,其密封面粗糙度必须在Ra.5m以上。
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