SMC Networks IRV10, Руководство по эксплуатации, Страница: 6 / 16

- 5 -
２ .Construction and Operating Principle
① By turning handle ② clockwise, force of set spring ③ pushes down diaphragm ④ and main valve so
that VAC. Pressure side and SET. Pressure side are connected, which increases vacuum on
SET. Pressure side (become closer to absolute vacuum).
⑥
Vacuum pressure on SET. Pressure side passes air pass, goes to vacuum chamber and acts
③ on the top of diaphragm . This pressure opposes compression force of set ② spring and
becomes SET. Pressure.
When vacuum SET. Pressure becomes higher than the set value (closer to absolute vacuum),
② ⑥
balance of set spring and SET. Pressure in vacuum chamber is lost. Because of this,
③ ④ diaphragm is pushed up so that main valve c ⑤ loses and atmosphere suction valve opens.
Atmosphere flows in SET. Pressure and becomes SET. Pressure when compression force of set
②
Spring balances with SET. Pressure.
When vacuum of SET. Pressure becomes lower than the set value (closer to atmospheric
p
② ⑥ ③
ressure), balance of set spring and SET. Pressure in vacuum chamber is lost, and diaphragm is
⑤ ④
pushed down. Atmosphere suction valve closes and main valve opens, and air is sucked to VAC.
Pressure side. It becomes SET. Pressure when compression force o
②
f set spring
balances with SET. Pressure.
Block Diagram
②
SET SPRING
①
HANDLE
⑥
VACUUM CHAMBER
③ DIAPHRAGM
⑤
SUCTION VALVE
④ MAIN VALVE
Diaphragm
m
2
Setting spring
N/m
spring Compb .
1
(B)
m/N
Suction valve
m kPa
(S)
Displacement
m
+
－
Displacement
m
Vacuum
pressure
kPa
Force
N
VAC
Force
N