FIELD: machine building.
SUBSTANCE: booster is provided for driving of valves. Booster includes differential drive, moved in the first direction and in the second direction, the first booster, communicating by fluid with drive and the second booster, communicating by fluid with drive. The first booster includes the first feeding passageway and the first exhaust passageway, herewith the first feeding passageway supplies fluid to the drive and the first exhaust passageway withdraws fluid from the drive. The first exhaust passageway is implemented so that to provide the first resistance to the flow of fluid. The second booster includes the second feeding passageway and the second exhaust passageway, herewith the second feeding passageway supplies fluid to the drive and the second exhaust passageway withdraws fluid from the drive. The second exhaust passageway is implemented so that to provide the second resistance to the flow of fluid. The first resistance to the flow of fluid is higher than the second resistance to the flow of fluid, so drive moves in essence symmetric in the first direction and in the second direction.
EFFECT: enhanced reliability.
25 cl, 11 dwg
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