Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – Responsive to moving member developed fluid force – current...
Patent
1996-07-29
1998-06-16
Kwon, John T.
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
Responsive to moving member developed fluid force, current...
415 27, F04D 2700
Patent
active
057659915
ABSTRACT:
A process and a device for avoiding regulator instabilities in surge limit regulators for protecting a turbocompressor from surging if a high proportional gain is selected for the surge limit regulator by a blow-off via a blow-off valve. The control of the velocity of closing of the blow-off valve over time is performed by a gradient limiter of asymmetric design, wherein no velocity limitation acts in the opening direction, but a freely parameterizable velocity limitation of the closing process of the blow-off valve is provided in the closing direction. The gradient limiter is inserted between the surge limit regulator, which receives the control signals on the actual value of flow and the desired value of flow from a subtracter, and the control line for a pneumatic or hydraulic operating device of the blow-off valve.
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patent: 4789298 (1988-12-01), Blotenberg
patent: 4936740 (1990-06-01), Blotenberg
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patent: 4946343 (1990-08-01), Blotenberg
patent: 4948332 (1990-08-01), Blotenberg
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Kwon John T.
MAN Gutehoffnungshutte Aktiengesellschaft
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