Hydac Filtertechnik Gmbh

Hydac Cooling Gmbh

Roland Herber

Armin Schmidt

Michael Smolong

Claudia Wetzstein

A cooling device for an electric energy supply () has at least one first heat-dissipating part (). The power components () of the first heat-dissipating part are connected to the cooling device () in a thermally conductive manner. A fluid-conducting connection () conducts liquid coolant () from a pump () to a cooler () over the first heat-dissipating part (). One shut-off unit () each is arranged in the fluid-conducting connection () at least between the first heat-dissipating part () and the cooler () and between the pump () and the first heat-dissipating part (). To avoid an overpressure in at least one part () to be cooled, at least one pressure-limiting valve () is provided. The pressure-limiting valve is arranged in connection with the fluid conductor inside the part () and/or, as part of a unit () for preloading the cooling liquid () in the fluid-conducting connection () and is connected to the part () of the pressure side of a check valve () provided downstream of the part ().

Cooling device

A lubricating device for gear trains (), especially for wind power stations, includes at least two gear stages () that are disposed next to each other and are effectively interconnected, and a lubricant circuit () into which at least one filter unit () is mounted. To prevent stagnant resting zones for the lubricant from being created within the gear train housing including the gear stages, while ensuring that the entire lubricant that circulates in the gear stages is fed to the filter unit to be drawn off and filtered within predefined periods of time, the lubricant circulating inside the lubricant circuit () is discharged at one gear stage (), is drawn off through the filter unit, and can then be fed to the other gear stage ().

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Saarbrücken, Germany

Roland Herber