Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Power, Ltd.

Yuki Sumi

Tadasuke Nishioka

Chihiro Yoshimine

Takeshi Sano

Yuichiro Waki

Shimpei Yokoyama

A support part supports a bearing pad from an outer circumferential side so as to be swingable at a pivot position. A radius of curvature of a rotary shaft is Rj, a radius of curvature of a pad surface is Rp, and a radius of curvature of a reference circle centered at an axial line and having a radius equal to a distance between a center and the pivot position on the pad surface is Rb, and a relationship of Rj&#x3c;Rp&#x3c;Rb is established.

Bearing device and rotary machine

A journal bearing includes: a rotation shaft which is rotatable about an axis; a bearing lower half portion which slidably supports an outer circumferential surface of the rotation shaft; a bearing upper half portion which supports an upper side half portion of the outer circumferential surface of the rotation shaft; and a lubricating oil supply device which supplies lubricating oil between the bearing lower half portion and the bearing upper half portion, and the rotation shaft, wherein the bearing upper half portion includes a bearing body which faces the outer circumferential surface of the upper half portion of the rotation shaft, a land portion which protrudes inward in a radial direction from an inner circumferential surface of the bearing body, and a guide portion which guides lubricating oil to the sliding surface of the land portion.

Journal bearing and rotary machine

An object is to provide a tilting-pad bearing device whereby it is possible to levitate a rotation shaft with a low supply-oil pressure. A tilting-pad bearing device includes a plurality of bearing pads disposed around a rotation shaft so as to support the rotation shaft rotatably, a support member interposed between the plurality of bearing pads and a bearing housing supporting the plurality of bearing pads, the support member supporting each of the plurality of bearing pads pivotably, and an oil-supply mechanism configured to supply a lubricant oil to at least one oil groove formed on a bearing surface of at least one of the plurality of bearing pads. The at least one oil groove is disposed inside and outside a contact area of the bearing surface which is in contact with an outer circumferential surface of the rotation shaft when the rotation shaft is stopped.

Growing community of inventors

Tokyo, Japan

Yuki Sumi