Rotor for a screw compressor
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United States of America Patent
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Nov 4, 2014
Grant Date -
Feb 23, 2012
app pub date -
Jun 7, 2010
filing date -
Jun 10, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
Rotor for a screw compressor includes a rotor body (2) and a shaft (6), whereby said shaft extends at least with a part into or through a central or approximately central axial bored hole or passage (5) in the rotor body (2). The shaft (6) has a stretch element (7), whereby the rotor body (2) or at least a part thereof is held on the shaft (6) by means of tension elements (11 and 12) which are locked or can be locked axially with respect to the shaft and which are connected with each other by means of the stretch element (7). During the mounting of the rotor body (2) on the shaft (6), the stretch element is pre-tensioned by means of a tensile load and after locking the tension elements (11 and 12) and removal of the tensile load, is kept under an axial pretension which, in case the rotor (1) is not built in, amounts to at least thirty percent of the yield strength of the material of the stretch element (7), and this by means of the tension elements (11 and 12) which are kept apart from each other by the rotor body (2) or a part thereof.
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