Flywheel with a torsional damper

Details Flywheel with a torsional damper Flywheel with a torsional damper

1988-08-26

1990-08-21

Stodola, Daniel P.

Rotary shafts, gudgeons, housings, and flexible couplings for ro

Torque transmitted via flexible element

Coil spring

74574, 1921062, 464 64, F16D 314, F16F 1512

Patent

active

049502042

ABSTRACT:
A flywheel device with a torsional damper having a first spring mechanism with a synthetic spring constant K1 and a second spring mechanism with a synthetic spring constant K2, arranged in series with each other as a spring combination. The second spring mechanism is controlled so as to be changed in operation between effective and ineffective states by a second spring mechanism operation controlling device. Thus, the vibrational characteristic of the flywheel device includes two characteristics, that is, spring constant K1 and spring constant K3 which is a synthesis of the spring constants K1 and K2. When the rotational speed of the flywheel device passes through the resonance speed of the vibrational characteristic with spring constant K1, the characteristic of the flywheel device is shifted to spring constant K3 and, as a result, there is no notable resonance speed throughout the entire range of rotational speeds. Due to this shift mechanism, it is not necessary to provide a continuously sliding friction mechanism against the flywheel device. Further, due to this omission of the continuously sliding friction mechanism, the torque variation absorbing effect at the standard range of rotational speeds is greatly improved.

REFERENCES:
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patent: 4611701 (1986-09-01), Friedmann
patent: 4618048 (1986-10-01), Kobayashi
patent: 4663983 (1987-05-01), Kobayashi et al.
patent: 4714449 (1987-12-01), Woerner et al.
patent: 4760754 (1988-08-01), Friedmann
Flywheel Damper Reduces Low Speed Diesel Noise and Vibrations, 372 Automotive Engineering 93 (1985) Jan., No., Dallas, TX, U.S.A., vol. 93, No. 1, p. 85.
Shock and Vibration Hand Book, vol. 2, McGraw Hill-#30 Theory of Vibration Isolation, Charles E. Crede & Jerome E. Ruzicka, pp. 1-17.

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