Hydraulic screw press drive
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United States of America Patent
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-
Jul 1, 1980
Grant Date -
N/A
app pub date -
Jul 18, 1978
filing date -
Jul 18, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The drive of a hydraulic screw press comprises a power cylinder connected with the press slide by its movable member. The chamber of the power cylinder communicates with a pneudraulic accumulator provided with a device for its charging. The device comprises a pneudraulic cylinder with a distributor for communicating its under-piston hydraulic chamber alternately with the source of pressure and a low-pressure hydraulic line, and nonreturn valves for communicating the above-piston pneumatic chamber of the pneudraulic cylinder alternately with the pneumatic line and the pneumatic chamber of the pneudraulic accumulator. This ensures self-sufficiency of the drive of each hydraulic screw press, and the required pressure of gas in the pneudraulic accumulator with a comparatively simple design of the device for charging its pneumatic chamber.
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