Oscillatory pumping system for liquid vibration isolator
AssigneeBell Helicopter Textron Inc.
InventorsMichael Reaugh Smith, Frank B. Stamps, David E. Heverly, II
Life of this patent
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Abstract
In some examples, an oscillatory pumping system comprises: one or more active piston, a fluid, and two motors. The one or more active piston is disposed in a channel fluidically coupling two fluid chambers. The passive piston has a frequency response operable to counteract a vibratory displacement. The fluid is disposed in the channel and the two fluid chambers. The two motors couple to the one or more active piston. The two motors are operable to selectively change the frequency response of the passive piston based on oscillating the one or more active piston.
Claims20
A vibration isolation system comprising:
- a housing defining a cavity;
- a fluid disposed in the cavity;
- a passive piston disposed in the cavity and dividing the cavity into two fluid chambers, the passive piston having a frequency response operable to counteract a vibratory displacement of a vibrating object;
- a channel fluidically coupling the two fluid chambers;
- one or more active piston disposed in the channel;
- and
- two motors coupled to the one or more active piston, the two motors being operable to selectively change the frequency response of the passive piston based on oscillating the one or more active piston.
An aircraft comprising:
- a rotor system operable to generate a vibratory displacement;
- an airframe;
- a vibration isolation system coupled to the rotor system and the airframe, the vibration isolation system comprising:
- a housing defining a cavity;
- a fluid disposed in the cavity;
- a passive piston disposed in the cavity and dividing the cavity into two fluid chambers, the passive piston having a frequency response operable to counteract the vibratory displacement;
- a channel fluidically coupling the two fluid chambers;
- one or more active piston disposed in the channel;
- and
- two motors coupled to the one or more active piston, the two motors being operable to selectively change the frequency response of the passive piston based on oscillating the one or more active piston.
An oscillatory pumping system comprising:
- one or more active piston disposed in a channel fluidically coupling two fluid chambers, the passive piston having a frequency response operable to counteract a vibratory displacement;
- a fluid disposed in the channel and the two fluid chambers;
- and
- two motors coupled to the one or more active piston, the two motors being operable to selectively change the frequency response of the passive piston based on oscillating the one or more active piston.
Dependencies are inferred from the claim text.