Can anyone pls help me in understanding hydraulic oil supply to 90SR1, VH5 & 65GC1 after filter FH7 onwards..

GT : GE Frame 6, PG6541
Mark V Control System

denicemthomas [at] gmail.com

 

Are you trying to understand how the servo valves work, or how the valve actuators work, or what the symbols on the drawings mean, or how VH5 works?

This is a huge question, and if you can narrow it down, or we can work on it one piece at a time, we can try to help.

 

please need to explain to understand how the servo valves work,and which the maximum pressure Hydraulic or ratchet

Thank you

 

Replying to the post by Maint on 22 dec 2009.

It's not very clear what do you really want to know. But for "how the servo valve work" I can say that Servo valve has a coil and armature (electromagnet); often called as servo-motor. when current is applied to a servo valve’s coil, the armature will move. so does the flapper to either side (depending on value of the current applied, ie +ve or -ve), which will cause difference in the orifice openings at both sides of the flapper. Resulting differential in hydraulic oil flow through them, and due to that, pressure difference is build-up at both sides of the servo valve's spool which results in movement of the spool to one direction. The movement of the spool cause one pressure port and one drain to be opened for moving the actuator of the device (Valve or IGV etc).

Hope this help. For better understanding see servo valve's drawings in mark 5 manuals.

M M Ahsan
ahsan_rpc AT yahoo DOT com