公开(公告)号：US20160326721A1

公开(公告)日：2016-11-10

申请号：US15108311

申请日：2014-12-12

Applicant: DOOSAN INFRACORE CO., LTD.

Inventor： Hyun Sik LIM ,  Yong Lak CHO

IPC: E02F9/22 ,  F16K17/06 ,  F15B13/02 ,  F15B11/08 ,  F15B13/04

CPC classification number: E02F9/2267 ,  E02F9/2228 ,  E02F9/226 ,  E02F9/2285 ,  F15B11/08 ,  F15B13/024 ,  F15B13/026 ,  F15B13/0401 ,  F15B2211/2053 ,  F15B2211/50518 ,  F15B2211/50554 ,  F15B2211/5157 ,  F15B2211/528 ,  F16K17/06 ,  F16K17/105

Abstract: The present disclosure provides a pressure peak reduction valve for an excavator. The pressure peak reduction valve includes at least: a poppet seat which has an inlet port, and at least one communication hole which communicates with a hydraulic tank and is formed in an outer circumferential surface of the poppet seat; a main poppet which slides in the poppet seat; a poppet spring which is provided in the main poppet; a valve seat which has one end portion inserted into the main poppet so as to be in contact with one end portion of the poppet spring; a cone which is provided to be inserted into an openable hole formed at an end portion of the valve seat; an adjustment screw which is provided in the valve seat; and a piston which slides in the adjustment screw.

Abstract translation: 本公开提供了一种用于挖掘机的压力峰值减小阀。 所述压力峰值减压阀至少包括：具有入口的提升阀座和与所述提升阀座的外周面形成的至少一个与液压箱连通的连通孔; 在提升阀座上滑动的主支座; 提供在主提升阀中的提升阀弹簧; 阀座，其具有插入主提升阀中的一个端部以与提升阀弹簧的一个端部接触; 锥体，其被设置成插入形成在所述阀座的端部处的可打开孔中; 设置在阀座中的调节螺钉; 以及在调节螺钉中滑动的活塞。

公开(公告)号：US20170107691A1

公开(公告)日：2017-04-20

申请号：US15128869

申请日：2015-03-12

Applicant: Doosan Infracore Co., Ltd.

Inventor： Yong Lak CHO

IPC: E02F9/12 ,  E02F9/20 ,  E02F9/22 ,  F15B11/08 ,  F15B13/04

CPC classification number: E02F9/123 ,  E02F9/2004 ,  E02F9/2228 ,  E02F9/2267 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/08 ,  F15B11/17 ,  F15B13/0401 ,  F15B2211/20546 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/41554 ,  F15B2211/45 ,  F15B2211/575 ,  F15B2211/613 ,  F15B2211/6316 ,  F15B2211/67 ,  F15B2211/7058 ,  F15B2211/7135 ,  F15B2211/7142 ,  F15B2211/853 ,  F15B2211/8609 ,  F15B2211/8616

Abstract: The present disclosure relates to a method for controlling a swing motor in a hydraulic system and a hydraulic system. The method for controlling the swing motor in the hydraulic system and the hydraulic system according to the exemplary embodiment of the present disclosure may ensure the sufficient amount of hydraulic oil in a make-up line in a situation in which the hydraulic oil needs to be supplementarily supplied to the swing motor in the hydraulic system. Therefore, it is possible to prevent the occurrence of cavitation in the swing motor by stably supplying the amount of hydraulic oil at the point in time where the hydraulic oil needs to be supplementarily supplied to the swing motor. In addition, it is possible to prevent the occurrence of abnormal noise which is harsh to the ear when the cavitation occurs.

公开(公告)号：US20160032945A1

公开(公告)日：2016-02-04

申请号：US14776367

申请日：2014-03-13

Applicant: DOOSAN INFRACORE CO., LTD.

Inventor： Yong Lak CHO ,  Dal Sik JANG ,  Woo Yong JUNG ,  Min Ha AN ,  A Reum SEO ,  Sang Woo LEE ,  Yoon Seok JANG

IPC: F15B1/027 ,  F15B11/10 ,  F15B13/04 ,  F15B1/04 ,  F15B13/02

CPC classification number: F15B1/027 ,  E02F9/2217 ,  E02F9/2267 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/04 ,  F15B11/10 ,  F15B11/17 ,  F15B13/027 ,  F15B13/04 ,  F15B2201/4155 ,  F15B2201/51 ,  F15B2211/20561 ,  F15B2211/20576 ,  F15B2211/212 ,  F15B2211/27 ,  F15B2211/40 ,  F15B2211/7053 ,  F15B2211/785

Abstract: The present disclosure relates to a hydraulic system for a construction machine, and more particularly, to a hydraulic system for a construction machine including a plurality of actuators, in which each of the actuators includes a pump/motor, is operated under a control of a corresponding pump/motor, and stores working oil in an accumulator or receives the working oil supplemented from the accumulator in accordance with a difference between a flow rate entering the actuator and a flow rate discharged from the actuator.

Abstract translation: 本发明涉及一种用于建筑机械的液压系统，更具体地，涉及一种用于建筑机械的液压系统，该系统包括多个致动器，其中每个致动器包括泵/马达，在一个控制下运行 相应的泵/马达，并且将工作油存储在蓄能器中，或者根据进入致动器的流量与从致动器排出的流量之间的差异，接收从蓄能器补充的工作油。