公开(公告)号：US20040173379A1

公开(公告)日：2004-09-09

申请号：US10377753

申请日：2003-03-04

Applicant: SANDVIK AB

Inventor： Jarmo Leppanen

IPC: E21B007/00

CPC classification number: F04C28/24 ,  E21B7/022 ,  F04C18/16

Abstract: A power system includes a power unit, a screw compressor, a hydraulic pump, and a hydraulic control system. The screw compressor is connected to the power unit to be driven thereby for compressing air. The screw compressor has an air intake opening and an adjustable air intake valve mechanism for opening and closing the air intake opening. The hydraulic pump pressurizes hydraulic fluid, and the hydraulic control system is operably connected to the pump and to the air intake valve mechanism for utilizing the pressurized hydraulic fluid to adjust the air intake valve mechanism. The compressed air is delivered to an air reservoir which returns lubrication oil back to the compressor in quantities commensurate with the degree of openness of the air intake opening.

Abstract translation: 电力系统包括动力单元，螺杆式压缩机，液压泵和液压控制系统。 螺杆式压缩机连接到动力单元以被驱动以压缩空气。 螺杆式压缩机具有用于打开和关闭进气口的进气口和可调节进气阀机构。 液压泵对液压油加压，并且液压控制系统可操作地连接到泵和进气阀机构，以利用加压的液压流体来调节进气阀机构。 压缩空气被输送到空气储存器，该储存器将润滑油返回到压缩机，其数量与进气口的开度相当。