Dynamic reduction-ratio hoisting device
AssigneeMiVa Engineering Ltd.
InventorsVladimir Scekic, Russell Turnbull, Daniel Constantin Popa, Soegi Hartono
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Abstract
A hoisting device including a cable drum, a first motor, a second motor and a gear assembly is provided. The gear assembly includes a first epicyclic and a second epicyclic. The first epicyclic includes a first carrier rotationally connected to the cable drum, a first sun rotationally connected to the first motor, a first annulus, and a first planet in meshing engagement with the first sun and the first annulus. The second epicyclic includes a second carrier rotationally grounded, a second sun rotationally connected to the second motor, a second annulus connected to the first annulus, and a second planet in meshing engagement with the second sun and the second annulus.
Claims14
A hoisting device comprising:
- a cable drum;
- a first motor;
- a second motor;
- and
- a gear assembly comprising a first epicyclic and a second epicyclic,
- the first epicyclic comprising:
- a first carrier rotationally connected to the cable drum;
- a first sun rotationally connected to the first motor;
- a first annulus;
- a first planet in meshing engagement with the first sun and the first annulus;
- the second epicyclic comprising:
- a second carrier rotationally grounded;
- a second sun rotationally connected to the second motor;
- a second annulus connected to the first annulus;
- and
- a second planet in meshing engagement with the second sun and the second annulus;
- wherein the first motor and the second motor are operable only as motors in the same or opposite directions;
- wherein the hoisting device is a drawworks.
Dependencies are inferred from the claim text.