Pumps – With condition responsive pumped fluid control – Expansible chamber pump distributor operation modified
Patent
1992-10-14
1993-09-14
Bertsch, Richard A.
Pumps
With condition responsive pumped fluid control
Expansible chamber pump distributor operation modified
417286, F04B 4900
Patent
active
052443574
ABSTRACT:
Method for the continuous control of the delivery rate of reciprocating compressors by occasional holding-open of the suction valves by a lifting device (8), which is actuated by a lifting force supplied by a pressure medium. In order to take into consideration the properties of the gas delivered and to adapt the control method in a corresponding manner, the magnitude of the lifting force is chosen depending on the drive power respectively received by the drive motor (11) of the compressor (3). The lifting force may be limited depending on the drive power. An apparatus for carrying out the method includes a compressor system (3), which includes at least one cylinder (4-7) with a lifting device (8) for the suction valve, which is actuated by a lifting force applied by a pressure medium, the magnitude of which can be determined by a controller (10). The drive power received by the drive motor (11) of the compressor (3) is supplied to the controller (10) as a signal. Advantageously, the controller (10) receives a control signal as the reference value and the drive power of the drive motor (11) as an actual value. From the difference between these two signals, the controller (10) forms the lifting force, which then has the effect that the actual value is brought closer to the reference value.
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English abstract of JP-A-52-98207, Aug. 1977.
English abstract of JP-A-6075782, Apr. 1985.
English abstract of SU-1155885-A, May 1985.
Basichas Alfred
Bertsch Richard A.
Hoerbiger Ventilwerke Aktiengesellshaft
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