Rotary screw machine having thrust balancing means
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United States of America Patent
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Jan 25, 1994
Grant Date -
N/A
app pub date -
Jul 7, 1992
filing date -
Feb 9, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a rotary screw machine in which the shaft journals (20, 22) of the rotors (10) are journalled in a main thrust bearing (24) and a thrust balancing bearing (26). The thrust balancing bearing (26) is preloaded by springs (36) and by fluid pressure means (40, 44). According to the invention the fluid pressure means (40, 44) can excert a force on the thrust balancing bearing (26) in either axial direction. This increases the possibility for an optimal distribution of the forces on the thrust bearings (24, 26) at various running conditions.
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