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Hydraulic system for construction machine

一种液压系统、工程机械的技术，应用在机械设备、蓄能器的装置、移土机/挖土机等方向，能够解决驱动器运转速度减小等问题

Active Publication Date: 2015-12-23
HYUNDAI DOOSAN INVIGORATE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Expanding on this, there is a supplementary hydraulic circuit that replenishes from the side with excess flow to the side with insufficient flow. During the replenishment of hydraulic fluid, the operating speed of the driver decreases.

Method used

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  • Hydraulic system for construction machine
  • Hydraulic system for construction machine
  • Hydraulic system for construction machine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0118] Refer below Figure 5 and Figure 6 , illustrating the hydraulic system of the construction machine to which the working oil replenishment hydraulic circuit according to the embodiment of the present invention is applied.

[0119] Attached picture Figure 5 It is a hydraulic circuit diagram for explaining a working oil replenishment hydraulic circuit of an embodiment of the present invention in a hydraulic system of a construction machine, Figure 6 is for illustration Figure 5 A diagram of a check valve unit according to an embodiment of the present invention described in .

[0120] The first and second hydraulic lines 1La and 1L2 are connected to the pump / motor 140 and the driver 170, respectively. More specifically, the first hydraulic line 1La is connected to a first port 170 a formed on the head side of the pump / motor 140 and the cylinder 172 of the driver 170 . The second hydraulic line 1Lb is connected to a second port 170b formed on the pump / motor 140 and ...

no. 2 Embodiment

[0151] Refer below Figure 7 to Figure 9 , the control valve unit for the hydraulic system of the construction machine according to the embodiment of the present invention will be described.

[0152] Attached picture Figure 7is a diagram for explaining an example of a control valve unit for a hydraulic system of a construction machine according to an embodiment of the present invention, Figure 8 It is a figure for explaining the spool in the control valve unit for the hydraulic system of the construction machine of the embodiment of the present invention, Figure 9 It is a diagram for explaining a hydraulic system of a construction machine to which a control valve according to an embodiment of the present invention is applied.

[0153] The control valve unit 200 for a hydraulic system of a construction machine according to an embodiment of the present invention includes a valve body 300 and first and second check valve units 610 and 620 in a valve block 210 .

[0154] In ...

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PUM

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Abstract

The present invention 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. Each of the actuators has a pump / motor, is operated under a control of the corresponding pump / motor, and stores working oil in an accumulator thereof or receives the working oil supplemented from the accumulator in accordance with the difference between the flow rate introduced to the actuator and the flow rate discharged from the actuator.

Description

technical field [0001] The present invention relates to a hydraulic system of a construction machine, and in more detail, to a construction machine with a plurality of drives, each of which is provided with a pump / motor, and each drive is operated by means of the control of the corresponding pump / motor, so that A hydraulic system of a construction machine that stores hydraulic oil in an accumulator or receives replenishment from the accumulator according to the difference in the flow rate between the flow rate flowing into the driver and the flow rate discharged. [0002] In addition, the present invention relates to a hydraulic system of construction machinery, in the hydraulic system of construction machinery, when the flow in the hydraulic pipeline is insufficient, the flow is supplemented, and when the flow in the hydraulic pipeline is excessive, the flow can be discharged. Background technique [0003] Generally speaking, the hydraulic system of construction machinery i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02E02F9/22F15B11/028
CPCE02F9/2217E02F9/2267E02F9/2292E02F9/2296F15B11/17F15B2211/20561F15B2211/20576F15B2211/212F15B2211/27F15B2211/7053F15B2211/785E02F9/2289F15B1/027F15B1/04F15B11/10F15B13/027F15B13/04F15B2201/4155F15B2201/51F15B2211/40
Inventor 赵镕乐张达植郑雨容安敏河徐雅凛李相雨张伦硕
Owner HYUNDAI DOOSAN INVIGORATE CORP