Screw compressor with an hydropneumatic cylinder integral with the bearing holder
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United States of America Patent
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Sep 11, 2018
Grant Date -
Jan 18, 2018
app pub date -
Feb 9, 2016
filing date -
Feb 10, 2015
priority date (Note) -
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Abstract
A screw compressor includes a casing, a drive shaft, a screw rotor, a gate rotor, a slide valve, and a slide valve driving mechanism having a hydropneumatic cylinder. The drive shaft has one end supported via a bearing on a bearing holder held by the casing. The other end is coupled to an electric motor. A compression chamber is defined by the gate rotor meshing with a helical move formed on the screw rotor. The hydropneumatic cylinder is located opposite to the screw rotor with respect to the bearing. The bearing holder has an outer peripheral surface configured as a guide surface guiding a sliding movement of the slide valve. The bearing holder has axial end portions. One of the axial end portions located opposite to the screw rotor constitutes a cylinder tube of the hydropneumatic cylinder to achieve integration of the bearing holder and the hydropneumatic cylinder.
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