fig. the shematic view of 1kW class low temperature
difference Stirling engine
In this engine, Alpha type construction is adopted, and expansion side and compression side power piston are located in a straight line. By this construction form, the compression ratio of the engine is heiger than conventional gamma type low temperature difference engines, and friction losses are reduced significantly.
SUCTION's high performance plate fin and tube type heat exchangers are used for the heater and the cooler of the engine, and conventional laminated wire net type is used in the regenerator. This wire net is made of Brass.
Both expansion and compression side power pistons are driven by unique mechanism(we call "X yoke Mechanism"). This mechanism is consisted twe yokes. Each of yokes have two liner barings, one of which is located for vertical direction and other located a certain angle of inclination. These two yokes are combined with facing each other. With rotation of crank, the sliders located on inclined liner barings reciplocate along these barings, and the yokes themselves work with liner motion for vertical direction by follows phase angle each other.
180-(the angle of inclanation of slanting baring)*2
In this engine, slanting angle is set 15deg. therefore phase angle of both pistons is
By adopting this mechanism, engine's driven mechanism and engine itself became more compact, and acomplish to reduce mechanical friction losses depend on side thrust of piston rings.
Engine's body is applyed the structure of pressure vessels, therefore the engine can operate under higher buffer pressure than conventional low temperature difference engines. As the results, engine performance increase significantly.