Hydrostatic drive

摘要

A hydrostatic drive, especially a hydrostatic fan drive, includes a hydraulic constant-displacement pump configured to drive a hydraulic motor for a fan. The drive further includes a hydraulic machine configured to supply a second hydraulic circuit with a pressure medium. The constant-displacement pump is configured to be hydraulically combined with the hydraulic machine.

主权项

1. A hydrostatic drive, comprising:
a first hydraulic circuit that includes:
a hydraulic motor;a constant-displacement pump configured to supply the first hydraulic circuit with pressure medium to drive the hydraulic motor;a pilot-controlled pressure-limiting valve configured to limit a pressure in the first hydraulic circuit, the pilot-controlled pressure-limiting valve including a closing body; andan adjustable pilot control valve configured to set a closing pressure that acts on the closing body of the pilot-controlled pressure-limiting valve in a closing direction; a second hydraulic circuit that includes:
at least one hydraulic consumer separate from the hydraulic motor; anda hydraulic machine configured to supply only the second hydraulic circuit with pressure medium to drive the at least one hydraulic consumer; and an adjustment device configured to set a displacement volume of the hydraulic machine of the second hydraulic circuit, the displacement volume adjusted as a function of an operating state of the first hydraulic circuit, and a greater of a maximum load pressure of the at least one hydraulic consumer and the closing pressure, wherein the constant-displacement pump is further configured to be combined hydraulically with the hydraulic machine to at least partially drive the at least one hydraulic consumer.