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    • 2. 发明申请
    • HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINE, PROVIDED WITH PROTECTION DEVICE
    • 建筑机械液压系统,具有保护装置
    • US20160003265A1
    • 2016-01-07
    • US14768285
    • 2013-02-19
    • Hea-Gyoon JOUNGSung-Gon KIMVOLVO CONSTRUCTION EQUIPMENT AB
    • Hea-Gyoon JOUNGSung-Gon KIM
    • F15B11/042F15B20/00
    • F15B11/0423E02F9/2235E02F9/226E02F9/2296F15B20/00F15B2211/20546F15B2211/3116F15B2211/40F15B2211/45F15B2211/611F15B2211/62F15B2211/6343F15B2211/6652
    • A hydraulic system for a construction machine having a protection device is disclosed, which can limit a flow rate of hydraulic fluid that is discharged from a hydraulic pump in accordance with a hydraulic fluid temperature and notify an operator of information on the hydraulic fluid temperature. The hydraulic system for a construction machine includes a hydraulic actuator operated by hydraulic fluid that is supplied from a hydraulic pump; a control valve installed in a flow path between the hydraulic pump and the hydraulic actuator to control a flow rate of the hydraulic fluid that is supplied from the hydraulic pump to the hydraulic actuator; an oil cooler installed in a return flow path from the control valve to an hydraulic fluid tank to cool the hydraulic fluid; a hydraulic fluid temperature sensor detecting in real time a hydraulic fluid temperature of the hydraulic fluid tank; a hydraulic pump regulator controlling a discharge flow rate of the hydraulic pump through adjustment of an inclination angle of a swash plate of the hydraulic pump; and a controller comparing the hydraulic fluid temperature detected by the hydraulic fluid temperature sensor with a predetermined hydraulic fluid temperature, and outputting a control signal to the hydraulic pump regulator so as to limit the discharge flow rate of the hydraulic pump to or below a predetermined flow rate if the detected hydraulic fluid temperature is equal to or lower than a predetermined lower limit value, or equal to or higher than a predetermined upper limit value.
    • 公开了一种用于具有保护装置的施工机械的液压系统,其可以根据液压流体温度限制从液压泵排出的液压流体的流量,并且向操作者通知关于液压流体温度的信息。 用于建筑机械的液压系统包括由液压泵供应的液压流体操作的液压致动器; 安装在所述液压泵和所述液压致动器之间的流路中的控制阀,以控制从所述液压泵向所述液压致动器供给的所述液压流体的流量; 安装在从控制阀到液压油箱的回流路径中以冷却液压流体的油冷却器; 液压油温度传感器实时检测液压油箱的液压油温度; 液压泵调节器,其通过调节所述液压泵的斜板的倾斜角度来控制所述液压泵的排出流量; 以及控制器,将由液压流体温度传感器检测的液压流体温度与预定的液压流体温度进行比较,并将控制信号输出到液压泵调节器,以将液压泵的排出流量限制在或低于预定流量 如果检测到的液压流体温度等于或低于预定的下限值,或者等于或高于预定的上限值的速率。