Lubricant system
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United States of America Patent
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Jun 16, 2015
Grant Date -
Dec 15, 2011
app pub date -
Feb 18, 2010
filing date -
Feb 18, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
There is proposed a lubricant system having a plurality of motor-driven pumps operating in parallel as main oil pumps, wherein even if at least one of the main oil pumps stops, the other normally operating main oil pumps do not stop due to overload of a motor. A lubricant system 7 comprises a hydraulic pressure piping 9, a plurality of lubricant pumps 10 arranged in parallel, a plurality of AC motors 11 driving each of the lubricant pumps 10, an error detector 24 detecting a presence or absence of an error in an operating state of each of the AC motors 11, a pressure loss addition unit 25 configured to increase pressure loss in the hydraulic pressure piping 9, and a controller 26 causing the pressure loss addition unit 25 to increase pressure loss when the error detector 24 detects an error in at least one of the AC motors 11. When an error occurs in at least one of the AC motors 11, the lubricant system 7 changes each working point of the lubricant pumps 10 driven by another AC motor 11 to a lower flow side than that in a steady operation.
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