С.Н. Прудников
10
Assessment of the required effort on the sealing elements
in pneumatic and vacuum systems
S.N. Prudnikov
Bauman Moscow State Technical University, Moscow, 105005, Russia
When operating the actuator in pneumatic and hydraulic systems with large nominal di-
ameters and significant pressure difference, there arises a task of ensuring error-free
performance of regulators directly, i.e. single-seat valves, the disks of which are experi-
encing significant unbalanced forces. This brings to the necessity of using drives with a
larger capacity. The article shows the calculated data to evaluate produced forces on the
disc of the valve of the shutoff device, the results of experimental studies of the dynamic
characteristics of pneumatic actuators ensuring rate of valve motion specified for piston
travel. We consider methods of actuator braking, give specific recommendations on the se-
lection of braking device parameters. When applying pneumatic actuators in vacuum sys-
tems it is necessary to ensure the tightness of the joint cover–camera. We offer schemes of
actuating mechanism control by using pneumatic automation componentry. The calculat-
ed and experimental data evaluate leakage through the sealing elements, depending on
the pressure drop and the sealing material used.
Keywords:
pneumatic valve, developed force, sealing element, the tightness of the seal.
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