(19)
(11) EP 3 569 872 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
01.01.2020 Bulletin 2020/01

(43) Date of publication:
20.11.2019 Bulletin 2019/47

(21) Application number: 18887212.1

(22) Date of filing: 02.05.2018
(51) International Patent Classification (IPC): 
F15B 11/16(2006.01)
(86) International application number:
PCT/CN2018/085343
(87) International publication number:
WO 2019/178922 (26.09.2019 Gazette 2019/39)
(84) Designated Contracting States:
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
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 23.03.2018 CN 201810247172

(71) Applicant: Jiangsu Goldwind Science & Technology Co., Ltd.
Yancheng, Jiangsu 224100 (CN)

(72) Inventors:
  • CHEN, Jinping
    Yancheng, Jiangsu 224100 (CN)
  • SHEN, Xingxing
    Yancheng, Jiangsu 224100 (CN)
  • ZHANG, Jinzhong
    Beijing 100176 (CN)

(74) Representative: Gulde & Partner 
Patent- und Rechtsanwaltskanzlei mbB Wallstraße 58/59
10179 Berlin
10179 Berlin (DE)

   


(54) BARRING DEVICE HYDRAULIC DRIVING SYSTEM AND DRIVING METHOD


(57) The disclosure relates to a hydraulic driving system and a driving method for barring. The hydraulic driving system comprises: three or more main drive hydraulic cylinders, which are divided into two groups to provide pulling and pushing forces to a driven impeller, each main drive hydraulic cylinder including a cylinder body and a piston rod which is disposed within the cylinder body to divide the cylinder body into a rod cavity and a rodless cavity, wherein an oil line for the rod cavity and an oil line for the rodless cavity of each main drive hydraulic cylinder are controlled by one control valve module; and a control device, which controls the control valve module according to wind and/or load signals, to simultaneously convert flow directions of hydraulic oil in the oil line for the rod cavity and the oil line for the rodless cavity of at least one of the three or more main drive hydraulic cylinders. The hydraulic driving system and the driving method can buffer an abrupt change in load when the impeller rotates.