Title:
DAMPING APPARATUS FOR EXHAUST VALVE FOR PREVENTING CAVITATION IN HYDRAULIC EXHAUST VALVE-DRIVING APPARATUS OF LARGE DIESEL ENGINE
Document Type and Number:
WIPO Patent Application WO/2010/050701
Kind Code:
A2
Abstract:
The present invention relates to a damping apparatus for an exhaust valve for preventing cavitation in a hydraulic exhaust valve-driving apparatus of a large diesel engine. The objective of the present invention is to provide a damping apparatus for an exhaust valve for preventing cavitation in a damper cylinder during the opening of an exhaust valve, and thus preventing noise, vibration, and erosion caused by cavitation, by having a check valve arranged in a damper piston of the large engine to enable hydraulic oil to easily flow into the damper cylinder. The present invention has a technical ideal in that the damping apparatus having the damper piston and the damper cylinder comprises: a horizontal flow channel (1) opened through both sides of the interior of the damper piston to enable the inflow of hydraulic oil; a vertical flow channel (2) penetrating from the horizontal flow channel (1) to the bottom surface of the damper piston; and a check valve (3) mounted on a certain point of the vertical flow channel such that the check valve (3) opens downwardly by a pressure difference, thereby enabling hydraulic oil to flow into the damper cylinder and thus preventing cavitation.
Inventors:
KIM DONG-HUN (KR)
RYU SEUNG-HYUP (KR)
BAE JONG-GUG (KR)
KIM HUN-SEOG (KR)
KIM JU-TAE (KR)
RYU SEUNG-HYUP (KR)
BAE JONG-GUG (KR)
KIM HUN-SEOG (KR)
KIM JU-TAE (KR)
Application Number:
PCT/KR2009/006140
Publication Date:
May 06, 2010
Filing Date:
October 22, 2009
Export Citation:
Assignee:
HYUN DAI HEAVY IND CO LTD (KR)
KIM DONG-HUN (KR)
RYU SEUNG-HYUP (KR)
BAE JONG-GUG (KR)
KIM HUN-SEOG (KR)
KIM JU-TAE (KR)
KIM DONG-HUN (KR)
RYU SEUNG-HYUP (KR)
BAE JONG-GUG (KR)
KIM HUN-SEOG (KR)
KIM JU-TAE (KR)
International Classes:
F01L9/10; F01L13/00
Foreign References:
| JPS6085208A | 1985-05-14 | |||
| JPH1122432A | 1999-01-26 | |||
| KR19980064309U | ||||
| JPS63183405U | 1988-11-25 |
Attorney, Agent or Firm:
CHANG, Soon-Boo et al. (KR)
장순부 (KR)
장순부 (KR)
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