Chapter 11 Circuits
Jan 05, 2016
Chapter 11
Circuits
定流量系統 (constant flow systems):‧ 定排量 pump 定轉速:
‧meter-out 流量控制閥:
‧ 輸送帶迴路:
‧ 壓床迴路:
定壓力系統 (constant pressure systems) :
定功率系統 (constant horsepower system) :
‧ 電驅動式升降機:
負荷感測系統 (load-sensing system) :
Other basic circuits( 其他基本迴路 ) :‧ 卸載迴路 (unloading circuits) :
‧ 卸載迴路:
(Ⅰ)
‧ 卸載迴路:
‧ 卸載迴路:
Ⅰ : rapid traverse at low pressure
Ⅱ : slow advance at high pressure (left pump is unloaded)
(Ⅰ)
‧ 順序迴路: Position(1):(S1)
clampdrill
Position(2):(S2)
drill retracts
clamp retracts‧ 再生迴路:
(Ⅱ)
‧ 同步迴路:
(Ⅱ)
‧ 同步迴路:‧with replenishing circuit( 補充油路 )
Position(1):Extension
if cylinder 1 reaches limit switch first
valve A is energized and
supplies additional fluid to
cylinder 2
Position(2):Retraction
if cylinder 2 reaches limit switch first
valve A supplies fluid to
cylinder 1
Fluid motor speed
pressure
pilot operated
2 way control
valve:closed
pressure
(Ⅲ)
‧ 安全迴路:
‧overload protection:
(Ⅲ)
‧ 安全迴路:
‧pilot shutoff
valve:open
cylinder retracts
(main control valve:
position(1) )
‧both palm valves
depressed
cylinder extends
(main control valve:
position(2) )
‧open center circuits:
‧open center circuits:
‧closed center circuits: