EP 2553231 B1 20140101 - HYDRAULIC FAN DRIVE
Title (en)
HYDRAULIC FAN DRIVE
Title (de)
HYDRAULISCHER LÜFTERANTRIEB
Title (fr)
ENTRAÎNEMENT HYDRAULIQUE DE VENTILATEUR
Publication
Application
Priority
- DE 102010013453 A 20100330
- DE 2011000217 W 20110303
Abstract (en)
[origin: WO2011120486A2] The invention proceeds from a hydraulic fan drive which has a hydraulic pump which can have its swept volume adjusted and is assigned a pressure control valve arrangement for regulating a pump pressure by adjustment of the swept volume, a hydraulic motor for driving an impeller wheel, and a pressure line which is connected to a pressure input of the hydraulic motor and into which pressure medium can be conveyed by the hydraulic pump. Fan drives of this type can be used, for example, in construction machines, agricultural and forestry machines, in conveying technology, in lorries and omnibuses and in rail vehicles. The invention is based on the problem of developing a hydraulic fan drive of this type in such a way that it can be used for the recuperation of energy. This problem is solved by the fact that a hydraulic accumulator is connected to the pressure line and the hydraulic motor can have its displacement adjusted. In the case of a hydraulic fan drive according to the invention, energy can be buffer-stored on account of the hydraulic accumulator which is connected to the pressure line by feeding in pressure medium beyond the amount which is displaced by the hydraulic motor, which energy becomes free in other operations on the machine, for example during a braking operation or during the lowering of a load. The pressure changes in the pressure line which are associated with the buffer storage and the output of energy can be compensated for by a change in the displacement of the hydraulic motor in such a way that the torque which is output by the hydraulic motor corresponds to the desired fan speed.
IPC 8 full level
F01P 7/04 (2006.01)
CPC (source: EP US)
F01P 7/044 (2013.01 - EP US); F04D 13/046 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2011120486 A2 20111006; WO 2011120486 A3 20120105; CN 102812218 A 20121205; CN 102812218 B 20150722; DE 102011012905 A1 20111006; EP 2553231 A2 20130206; EP 2553231 B1 20140101; JP 2013524107 A 20130617; JP 5599504 B2 20141001; KR 20130018253 A 20130220; US 2013202452 A1 20130808
DOCDB simple family (application)
DE 2011000217 W 20110303; CN 201180017435 A 20110303; DE 102011012905 A 20110303; EP 11718903 A 20110303; JP 2013501623 A 20110303; KR 20127025211 A 20110303; US 201113638016 A 20110303