Control of Reciprocating Linear Machines

An apparatus and method for controlling the offset and dynamics of a moving assembly in a reciprocating linear machine such as a linear compressor, heat pump or engine, comprises a gas spring connected to the moving assembly of the reciprocating linear machine and a pressure adjuster for adjusting t...

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Bibliographische Detailangaben
1. Verfasser:	DADD MICHAEL W
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR ENGINE PLANTS IN GENERAL FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS HEATING HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINEPLANTS HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS HYDRAULICS OR PNEUMATICS IN GENERAL INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MACHINES OR ENGINES IN GENERAL MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENTTYPE, e.g. STEAM ENGINES MECHANICAL ENGINEERING NOT OTHERWISE PROVIDED FOR POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS STEAM ENGINES SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL USE OF WASTE HEAT OF COMBUSTION ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	An apparatus and method for controlling the offset and dynamics of a moving assembly in a reciprocating linear machine such as a linear compressor, heat pump or engine, comprises a gas spring connected to the moving assembly of the reciprocating linear machine and a pressure adjuster for adjusting the gas pressure in the gas spring. A position detector is provided for detecting the position of the moving assembly, either directly using a sensor, or from the drive to the moving assembly, and a controller controls the pressure adjuster in response to the detected position of the moving assembly. By adjusting the gas pressure the offset of the moving assembly can be controlled, and also the spring constant provided by the gas spring, and thus the resonant frequency of the assembly, can be adjusted.