Stirling engine

Patent · Mon Nov 03 23:00:00 EST 1986

OSTI ID:6999420

Fujiwara, M; Kazumoto, Y; Nomaguchi, T; Kashiwamura, K

This patent describes a Stirling engine wherein a pressure variation is provided by reciprocative movement of a displacer and is utilized by a power piston to obtain an output motive force, which comprises: a pressurized crankcase, an expansion cylinder having a seal carrying wall, a displacer located in the expansion cylinder, a displacer rod connected to the displacer and projecting through the seal and into the crankcase, a first elastic film attached to the displacer rod and to the seal carrying wall so as to produce a first hermetically sealed space, a compression cylinder, a power piston having a power piston rod located in the compression cylinder, a second elastic film attached to the power piston rod and to the compression cylinder so as to produce a second hermetically sealed space below the power piston, the first and the second hermetically sealed spaces being included in a pressurized reactive space, a pressure adjusting means for equalizing the mean pressure within the reactive space and the mean pressure within the crankcase, a heater tube, a regenerator, and a cooler tube are connected to the expansion cylinder, and are included in a working space, as is the expansion cylinder and the compression cylinder, and a first gas having a low viscosity, a low molecular weight and a high thermal conductivity is sealed in the working space and the reactive space, and a second gas having a high viscosity and a high molecular weight is sealed in the crankcase.

• Assignee: Mitsubishi Denki Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4620418
• OSTI ID: 6999420
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330201* -- External Combustion Engines-- Stirling Cycle
CONTROL
COOLING SYSTEMS
CYLINDERS
DESIGN
ENERGY SYSTEMS
ENGINES
EXPANSION
FILMS
FLUIDS
GASES
HEAT ENGINES
HEATERS
MOLECULAR WEIGHT
PHYSICAL PROPERTIES
PISTONS
PRESSURE CONTROL
PRESSURIZING
REGENERATORS
SEALS
SPACE DEPENDENCE
STIRLING ENGINES
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
VISCOSITY