Internal gear machine with rotary pressure balanced valve disc
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United States of America Patent
Stats
-
Oct 25, 1983
Issued Date -
N/A
app pub date -
Apr 15, 1981
filing date -
Apr 23, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hydraulic internal gear machine includes a positive displacement unit for working liquid constituted by a rotary outer gear and an inner gear surrounding the outer gear and being in mesh therewith at one point to define a plurality of increasing liquid displacement chambers. The chambers are laterally bounded by a rotary disc which cooperates with a stationary control plate. The disc and the control plates are formed respectively with flow control openings for admitting pressure liquid into a half of the chambers and for discharging the liquid from the other half of the number of chambers. To compensate for the tilting moment acting on the rotary disc, the interface between the rotary disc and the control chamber is provided with arcuate recessed sections communicating with the openings in the rotary disc to apply pressurized liquid in the displacement chambers against both sides of the rotary disc.
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