Oscillatory pumping system for liquid vibration isolator
AssigneeTextron Innovations 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.
Claims14
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;
- an active piston disposed in the channel;
- and
- two motors coupled to the active piston, the two motors being operable to selectively change the frequency response of the passive piston based on oscillating the active piston;
- wherein:
- the two motors are operable to oscillate out of phase with one another to oscillate the fluid in the channel and in the two fluid chambers based on oscillating the active piston, and
- the two motors are operable to oscillate in antiphase with one another to hold constant a position of the active piston;
- wherein at least one of the two motors is submerged in and in direct contact with the fluid and the fluid cools the at least one of the two motors based on absorbing heat energy from the motor;
- and
- wherein the vibration system further comprises a plurality of fins operable to dissipate the heat energy by convection.
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;
- wherein the fluid comprises a fluorocarbon oil.
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;
- wherein at least one of the two motors is submerged in and in direct contact with the fluid and the fluid cools the at least one of the two motors based on absorbing heat energy from the motor, the oscillatory pumping system further comprising a plurality of fins operable to dissipate the heat energy by convection.
Dependencies are inferred from the claim text.