EP 4265918 A1 20231025 - BALANCE CYLINDER HYDRAULIC SYSTEM
Title (en)
BALANCE CYLINDER HYDRAULIC SYSTEM
Title (de)
HYDRAULISCHES AUSGLEICHSZYLINDERSYSTEM
Title (fr)
SYSTÈME HYDRAULIQUE DE CYLINDRE D'ÉQUILIBRAGE
Publication
Application
Priority
- CN 202011481878 A 20201215
- CN 2021121586 W 20210929
Abstract (en)
The present disclosure provides a balance cylinder hydraulic system, comprising: a valve assembly; and a balance cylinder comprising a housing, a piston member, and a first cavity, a second cavity and a third cavity which are obtained by the piston member movably sealing a hollow region enclosed by the housing, wherein the area of the piston member acting on the first cavity is equal to the area of the piston member acting on the second cavity, the pressure of the first cavity is equal to the pressure of the second cavity and higher than the pressure of the third cavity, and a compensation oil passage controlled by the valve assembly is provided between the first cavity and the third cavity; a first accumulator, between the first accumulator and the first cavity, a target oil passage and a first oil passage which are controlled by the valve assembly being provided; and a second accumulator in communication with the second cavity, a second oil passage controlled by the valve assembly being provided between the second accumulator and the first cavity. In the embodiments of the present disclosure, after the internal leakage in the balance cylinder occurs, the system can automatically compensate for the internal leakage, without stopping the operation of the balance cylinder.
IPC 8 full level
F15B 1/02 (2006.01); F15B 13/02 (2006.01)
CPC (source: CN EP)
F15B 1/02 (2013.01 - CN EP); F15B 13/02 (2013.01 - CN); F15B 13/027 (2013.01 - CN); F15B 15/14 (2013.01 - EP); F15B 21/00 (2013.01 - CN); F15B 13/042 (2013.01 - EP); F15B 2211/212 (2013.01 - EP); F15B 2211/625 (2013.01 - EP); F15B 2211/7055 (2013.01 - EP)
Citation (search report)
See references of WO 2022127281A1
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
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4265918 A1 20231025; CN 112610542 A 20210406; CN 112610542 B 20220325; WO 2022127281 A1 20220623
DOCDB simple family (application)
EP 21905211 A 20210929; CN 202011481878 A 20201215; CN 2021121586 W 20210929