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Patent Searching and Data


Title:
HYDRAULIC SYSTEM FOR INCREASING OPERATION SPEED OF CONSTRUCTION MACHINERY BOOM
Document Type and Number:
WIPO Patent Application WO/2019/074301
Kind Code:
A1
Abstract:
A hydraulic system for increasing the operation speed of a construction machinery boom comprises: a boom cylinder for operating a construction machinery boom; a main control valve having a boom control spool for selectively supplying hydraulic oil, supplied from a hydraulic pump, to a boom head chamber and a boom rod chamber of the boom cylinder through a boom head hydraulic line and a boom rod hydraulic line; a regeneration device connected to the boom head chamber of the boom cylinder through a hydraulic regeneration line, so as to regenerate energy in the boom cylinder; and a regeneration valve unit installed in the hydraulic regeneration line and having a flow control valve for controlling the flow rate of the hydraulic oil flowing through the hydraulic regeneration line, wherein energy stored in the regeneration device during lowering of the boom is supplied directly to the boom cylinder via the flow control valve when the boom is raised.

Inventors:
KANG BYUNG IL (KR)
Application Number:
PCT/KR2018/011977
Publication Date:
April 18, 2019
Filing Date:
October 11, 2018
Export Citation:
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Assignee:
DOOSAN INFRACORE CO LTD (KR)
International Classes:
E02F9/22
Foreign References:
KR20170066085A2017-06-14
KR20150077431A2015-07-07
KR101532783B12015-06-30
KR20170093278A2017-08-16
KR101735117B12017-05-12
Attorney, Agent or Firm:
YOON, Yu Kwang et al. (KR)
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