RESONANCE FREQUENCY ADJUSTING METHOD AND STIRLING ENGINE

WIPO Patent Application WO/2004/090441

A1

With spacers (30, 31) held between the central portion and the circumference of two plate springs (61, 61), a fixed shaft (67) erected on a fixed block (70) is inserted in a through hole (64) in the periphery of the plate spring (61) and also in the spacer (31), and nuts (68, 68) are applied for tightening from above and below (step &num 1). Thereby, a displacer support spring (6) is fixed to the fixed block (70). And the threaded portion (2b) of a rod (2a) is inserted in a through hole (63) in the center of the plate spring (61) and also in the spacer (30) from the upper surface side of the upper plate spring (61), and a nut (32) is attached to the threaded portion (2b) projecting from the lower surface of the lower plate spring (61) so as to fix the displacer (2) to the upper surface side of the upper plate spring (61) (step &num 2). In this state, small vibration is applied to the displacer support spring (6) (step &num 3). And the resonance frequency is detected (step &num 4) and on the basis of this result, the spring constant of the displacer support spring (6) (the combined spring constant of the two plate springs (61, 61)) is calculated, and then an additional weight &Dgr Wd reaching the target resonance frequency is calculated (step &num 5).

TANAKA SHOHZOH (JP)

PCT/JP2004/005048

October 21, 2004

April 07, 2004

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SHARP KK (JP)
TANAKA SHOHZOH (JP)

F02G1/043; F02G1/045; F02G1/053; F25B9/14; H02K15/16; (IPC1-7): F25B9/14

JP2002186074A	2002-06-28
JPH0674588A	1994-03-15
JP2003083627A	2003-03-19
JPH04353361A	1992-12-08
JP2000193337A	2000-07-14
JPH10325629A	1998-12-08
JPH05288419A	1993-11-02

See also references of EP 1617156A4

Sano, Shizuo (2-6 Tenmabashi-kyomachi, Chuo-k, Osaka-shi Osaka, JP)

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