公开(公告)号：US20250027368A1

公开(公告)日：2025-01-23

申请号：US18714608

申请日：2022-12-02

Applicant: SANDVIK MINING AND CONSTRUCTION OY

Inventor： Juha POLONEN ,  Jarkko NIEMI ,  Timo KELA

IPC: E21B1/38 ,  B25D9/20 ,  E21B1/26

Abstract: A hydraulic system, rock drilling rig, and method for limiting output performance of a hydraulic drilling actuator temporarily under execution of a safety function feature of a hydraulic system is provided. The output performance is limited by limiting produced hydraulic fluid flow in a hydraulic circuit of the hydraulic drilling actuator, whereby a restricted magnitude of the fluid flow is produced at a hydraulic pump. This way a restricted operation mode is enabled and is controlled by a control unit.