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1. (WO2018164263) SHOVEL

Pub. No.:    WO/2018/164263    International Application No.:    PCT/JP2018/009218
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Sat Mar 10 00:59:59 CET 2018
IPC: F15B 11/00
E02F 9/22
Applicants: SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.
住友建機株式会社
Inventors: MISAKI, Youji
三崎 陽二
Title: SHOVEL
Abstract:
A shovel according to an embodiment of the present invention is provided with: a base carrier (1); an upper turning body (3) that is mounted on the base carrier (1) in a turnable manner; a main pump (14) that is mounted on the upper turning body (3); a hydraulic actuator that is driven by hydraulic oil discharged by the main pump (14); a bleed valve (177) that controls, of the hydraulic oil discharged by the main pump (14), the flow rate of hydraulic oil flowing into a hydraulic oil tank without being routed through the hydraulic actuator; and a controller (30) that controls the opening area of the bleed valve (177) according to the magnitude of pulsation at the pressure of hydraulic oil supplied from the main pump (14) to the hydraulic actuator.