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如图所示是利用先导式溢流阀进行卸荷的回路。溢流阀调定压力 p y = 30 × 10 5 Pa 。要求考虑阀芯阻尼的压力损失,回答下列问题: 1 ) 在溢流阀开启或关闭时,控制油路 E , F 段与泵出口处 B 点的油路是否始终是连通的? 2 ) 在电磁铁 1Y 断电时,若泵的工作压力 p B = 30 × 10 5 Pa , B 点和 E 点压力哪个压力大?若泵的工作压力 p B = 15 × 10 5 Pa , B 点和 E 点哪个压力大? 3 )在电磁铁 1Y 吸合时,泵的流量是如何流到油箱中去的?
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对文字图层应用 “编辑”菜单中的变换命令后仍能编辑文字
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