Car body deep-drawing press pump with primary-loaded pistons

摘要

The transmitter (4a) load valve is a continuously adjusting way-valve (14) in whose intermediate float setting the pressure transmitters (4a) are connected to a tank (T). The primary pump (10) control unit (34) actuates the valves (14) depending on the transmitter piston travel or the pressure in the primary circuit. The transmitters share an adjustable pump (1) as a primary and are circuited in parallel so that each cylinder and piston are exposed using the pump to the primary circuit pressure. The cylinder has a high-pressure piston sector (26) to act on the pressure fluid tapped at pressure from the fluid tank (HFA) using valve (46,48), and in this case the primary pump consists of a zeroing adjuster pump.