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Drivetrain and method for drives having widely spaced oeprating points

  • US 10,145,359 B2
  • Filed: 09/02/2014
  • Issued: 12/04/2018
  • Est. Priority Date: 09/05/2013
  • Status: Active Grant
First Claim
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1. A device to achieve a high speed spread at high efficiency in a powertrain of a driven machine or system, the device comprising:

  • (i) a first power machine (A1) and a second power machine (A2) which are indirectly—

    via appropriate coupling elements, transmission links or translation devices (7, 8)—

    or directly torque-proof connected to a carrier shaft (S) and a slower transmission central shaft (2), respectively, of an epicyclic gear (3) that determine a fixed carrier train ratio, and(ii) a work machine (L) which is indirectly—

    via the appropriate coupling elements, transmission links or translation devices—

    or directly torque-proof connected with a faster transmission central shaft (1) of the epicyclic gear (3), and(iii) at least one coupling device (6) which blocks internal movements of the epicyclic gear (3) in a first rotational direction and permits the internal movements in an opposite rotational direction,further comprising one of the following;

    at least one of the coupling devices (6, 7, 8) is torsional flexibly connected with one or several of the involved transmission linkages of the device, ora speed for optimum machine performance with regard to efficiency is essentially same or deviates from the first and the second power machine by a maximum of 10%, ora ratio of torque of optimum machine performance with regard to efficiency of the first and the second power machines is essentially equal to an absolute value of a term defined by a reciprocal of a product of a stationary translation and a stationary efficiency in a power flow direction of the epicyclic gear, reduced by 1, or does not deviate more than a maximum of 10% from this term.

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