Kabushiki Kaisha Toshiba

Moriaki Shimoda

Takayoshi Fujiwara

Yoshinori Sone

Masayuki Okuda

Naoya Morozumi

Takuya Hirayama

Satoshi Oyama

Hirotsugu Sakata

Shinobu Sato

Hitoshi Hattori

Makoto Hayano

Hisanori Honma

Takashi Honjo

Eiichi Aikawa

Tetsuo Fukuda

Noritsugu Kawashima

Kazuhisa Sumida

Shigeo Kida

Helical blade fluid compressor having an aluminum alloy rotating member

A compressor includes a casing having an oil reservoir, a cylinder situated within the casing, a cylindrical rotary body situated eccentrically within the cylinder, the rotary body having first and second spiral grooves extending in opposite directions from the middle part of the rotary body to both ends of the rotary body, first and second spiral blades fitted in the first and second spiral grooves, the blades having outer peripheral surfaces brought into contact with the inner peripheral surface of the cylinder, dividing the space defined by the inner peripheral surface of the cylinder and the rotary body into a plurality of working chambers, thereby constituting first and second compression sections, wherein the first and second blades freely project from and retreat in the first and second spiral grooves in the radial direction of the rotary body, driving means for rotating the cylinder and the rotary body relative to each other, a first refrigerant passage formed in the rotary body and opening to an area between the first and second compression sections and to one axial end portion of the rotary body, and oil supply means having first and second oil supply holes opening respectively to the first and second compression sections, and supplying oil in the oil reservoir to the first and second compression sections via the first and second oil supply holes.

Fluid compressor having lubrication for two spiral blade compression

A fluid compressor includes a cylinder having first and second discharge ends, in which a rotating rod is rotatably arranged. First and second spiral grooves are formed on the outer circumference of the rod, and first and second spiral blades are fitted into the grooves. The first groove has a first starting end located in the middle portion of the rod, and extends from the starting end toward the first discharge end. The second groove has a second starting end located in the middle portion of the rod, and extends from the second starting end toward the second discharge end. The first and second starting ends are set apart from each other by a certain angle in the circumferential direction of the rod. Operating fluid is introduced into the middle portion in the cylinder, and fed to the first and second discharge ends of the cylinder through operating chambers defined by the first and second blades in the cylinder.

Fluid compressor

A fluid compressor includes a cylinder and a columnar rotary rod. The rod is arranged in the cylinder so as to extend in the axial direction thereof and be eccentric thereto, and orbitable relative to the cylinder without rotation with respect to the cylinder while part of the rod is in contact with the inner circumferential surface of the cylinder. A spiral groove is formed on the outer circumference of the rod and a spiral blade is fitted in the groove. The space between the outer circumference surface of the rod and the inner circumference surface of the cylinder is divided by the blade into a plurality of operating chambers. The groove has an overall length larger than that of the blade by a predetermined length so that the blade is displaceable relative to the rod in the radial and circumferential directions of the rod without sliding on the inner circumferential of the cylinder.

Growing community of inventors

Yokohama, Japan

Moriaki Shimoda