| 摘要 |
<p>A vibration isolator (1) with two degrees of freedom works according to the anti-resonance principle. The vibration isolator is arranged, for example, between a first body, such as a helicopter frame 13, and a second vibration generating body such as a rotor-transmission unit 12 vibrating at a predominant frequency. A spring arrangement (2) is connected to the attachment points (14, 15) for the first and second bodies. The spring arrangement works in conjunction with a pendulum rod (3) which is attached to the two bodies (12, 13) by spherical pivot bearings (5, 10). The vibration isolator has a compact construction and a low characteristic damping since the spring arrangement includes several relatively small semi-circular or spiral-shaped wound leaf springs (7-1 to 7-4) which extend between an inner ring (4) and an outer ring (6). The pendulum rod is held in a spherical pivot bearing (5) in the inner ring, and a further spherical pivot bearing (10) is connected by a flange (9) to the outer ring. A pendulum weight (11) is slidably mounted on the free end of the pendulum rod. The other end of the pendulum rod is held by the two pivot bearings.</p> |
