Filing Information

Inventor(s)	Hitoshi Nishimura · Tomoo Suzuki · Hiroshi Ohta ·
Assignee(s)	None listed in document.  View assignee updates
Correspondent	ANTONELLI, TERRY, STOUT & KRAUS, LLP ·
Application Number	US12348942
Filing date	01/06/2009
Publication date	05/14/2009
Predicted expiration date	03/06/2026
U.S. Classifications	417/243  · 418/199  · 418/9  · 417/245  ·
International Classifications	F04C224  · F04C2904  ·
Kind Code	A1
Foreign Priority	JP2005169661 - 06/09/2005 ·

Patent Family

Abstract

A screw compressor comprising: a low pressure stage compressor body; a high pressure stage compressor body that further compresses a compressed air compressed by the low pressure stage compressor body; pinion gears for example, respectively, provided on, for example, a male rotor of the low pressure stage compressor body and, for example, a male rotor of the high pressure stage compressor body; a motor; a bull gear for example, provided on a rotating shaft of the motor; and an intermediate shaft supported rotatably and provided with a pinion gear, which meshes with the bull gear, and a bull gear, which meshes with the pinion gears. Thereby, it is possible to make the motor relatively low in rotating speed while inhibiting the gears from being increased in diameter, thus enabling achieving reduction in cost.

Independent Claims | See all claims (10)

1. 1. A screw compressor comprising: a low pressure stage compressor body; a high pressure stage compressor body that further compresses a compressed air compressed by the low pressure stage compressor body; a plurality of rotor side gears, respectively, provided on rotor shafts of the low pressure stage compressor body and the high pressure stage compressor body; a motor; a motor side gear provided on a rotating shaft of the motor; an intermediate shaft supported rotatably and provided with a first speed-increasing gear, which meshes with the motor side gear, and a second speed-increasing gear, which meshes with the plurality of rotor side gears; a gear casing that accommodates therein the motor side gear, the first speed-increasing gear, the intermediate shaft, the second speed-increasing gear, and the rotor side gears; a first cooling apparatus that cools a compressed air from the low pressure stage compressor body; and a second cooling apparatus that cools a compressed air from the high pressure stage compressor body, wherein the motor, the gear casing, the low pressure stage compressor body, and the high pressure stage compressor body are arranged centrally of the compressor unit, the first cooling apparatus is arranged on one side in a long width direction of the compressor unit, and the second cooling apparatus is arranged on the other side in the long width direction of the compressor unit.