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Title:
SWING RELIEF ENERGY REGENERATION APPARATUS OF AN EXCAVATOR
Document Type and Number:
WIPO Patent Application WO/2013/081220
Kind Code:
A1
Abstract:
Disclosed is a swing relief energy regeneration apparatus in which working oil relieved into a hydraulic tank is stored in a pressure accumulator during swing and deceleration to recycle the stored pressure. The swing relief energy regeneration apparatus includes: a hydraulic pump and hydraulic motor; a swing motor connected to the hydraulic pump through first and second paths; a flow rate control valve controlling the working oil supplied from the hydraulic pump into the swing motor; a first passage having both ends branched and connected to the first and second paths to allow the working oil to move in one direction toward the first or second path from the hydraulic tank; a second passage defined parallel to the first passage and having both ends branched and connected to the upstream sides of the first and second paths to allow the working oil to move in one direction toward the hydraulic tank from the first or second path; a pressure accumulator disposed in a recycling path having one end connected to the second passage and the other end connected to the hydraulic motor to store the working oil relieved into the hydraulic tank; and a sluice valve opened to supply the working oil into the hydraulic motor from the pressure accumulator when the manipulation amount of a manipulation lever for controlling the operation of the excavator exceeds a set value.

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Inventors:
KIM SUNG-GON (KR)
KIM JAE-HONG (KR)
Application Number:
PCT/KR2011/009296
Publication Date:
June 06, 2013
Filing Date:
December 02, 2011
Export Citation:
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Assignee:
VOLVO CONSTR EQUIP AB (SE)
KIM SUNG-GON (KR)
KIM JAE-HONG (KR)
International Classes:
E02F9/22; E02F9/12; F15B11/024
Foreign References:
KR20110052041A2011-05-18
KR20110054209A2011-05-25
JPH0960045A1997-03-04
KR19990082097A1999-11-15
Other References:
None
See also references of EP 2787129A4
Attorney, Agent or Firm:
YOON, Eui-Seoup (KR)
윤의섭 (KR)
Download PDF:
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Claims:



 
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