A common daily breakdown servo pneumatic valve closed oil pump

closed oil pump servo pneumatic valve general components include: pneumatic valve, pneumatic valve cover, the pneumatic valve core and deputy pneumatic valve core, feedback pole, feedback spring and in the fork, an adjusting rod, lock nut and so on.
about the common faults of the servo pneumatic valve, generally have the following kinds:
a: partial cylinder main oil pump.
failure phenomenon: two cylinder synchronous movement of tandem until suppress cylinder
processing methods: loosen lock nut to adjust adjustment lever to observe the movement of the piston rod in the tank speed is slow, slow, continue to screw bolt clockwise until the stop of the piston rod. Faster, screw bolt counterclockwise, until the stop of the piston rod.
2: spring break.
failure phenomenon: can't adjust pump speed, with the fastest speed pump. High pumping pressure, may be the engine speed.
processing method: change the spring.
3: pneumatic valve core binding.
fault phenomenon: no pumping or both sides different cylinder speed, may also suppress the cylinder.
processing methods: clean pneumatic valve core or grinding.
4: feedback rod breaking or bending fault phenomenon:
can't adjust pump speed, with the fastest speed pump. High pumping pressure, may be the engine speed, or both sides different cylinder speed.
processing method: change the feedback pole.
the oil pump is a kind of portable and compact pump, this paper proposes a has a shell made of alumina materials of the pumps and set in the shell of the movement of the molding, among them, the moving of the molding at least in part by a sintering, contains at least one kind of austenitic iron base alloy material, and one by the molding is made can be sintered materials at least for the shell of the thermal expansion coefficient of thermal expansion coefficient of %.