Nsk Corporation

Katsuaki Denpou

Michiharu Naka

Kenichi Iso

Yasunobu Fujita

Kazuhiro Ohira

Yujiro Toda

Masahiko Yamazaki

Hirotoshi Miyajima

A sensor () arranged in a deep groove ball bearing () includes an encoder () attached at an inner ring () to be rotatable integrally with the inner ring (), and a magnetism detecting element () attached at an outer ring () via a sensor housing () to face the encoder () with a sensor gap. Then, the magnetism detecting element () is capable of measuring a rotating state of the encoder () rotating in the rotating state identical to that of the inner ring () in conjunction with a rotation of the inner ring (). The deep groove ball bearing () includes a foreign material entering prevention portion that prevents a foreign material from entering the inside of the bearing from a gap between the inner ring () and the sensor housing (). The size of the gap between the inner ring () and the sensor housing () is substantially identical to the sensor gap between the magnetism detecting element () and the encoder (), and the gap configures non-contact seal and functions as the foreign material entering prevention portion.

Roller bearing having sensor, motor, and actuator

The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.

Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system

Growing community of inventors

Kanagawa, Japan

Katsuaki Denpou