A bearing includes a thrust gas bearing attached to a journal bearing and two or more converging-diverging orifices defined in a surface of at least one of the thrust gas bearing and the journal bearing. The converging-diverging orifices supply at least one pressurized gas to an interior of the bearing. Hydrodynamic lifting grooves are provided on the faces of the thrust gas bearing and the journal bearing and provide improved load capacity and sealing capabilities. Control over the ratios of the pressurized gases provides for additional sealing capabilities and reduced leakage. A metal mesh damper provides increased damping of the gas bearing.

A sliding component includes a plurality of dynamic pressure generation mechanisms circumferentially arranged on a sliding surface of the sliding component. Each dynamic pressure generation mechanism includes an introduction groove portion communicating with a sealing target fluid side through an opening portion of the introduction groove portion and a dynamic pressure generation groove portion communicating with the introduction groove portion and extending in a circumferential direction in which the sliding component is relatively rotated with respect to a mating sliding component. The introduction groove portion is partially defined by a boundary wall positioned between the introduction groove portion and the dynamic pressure generation groove portion. The boundary wall has an inclined surface where at least a portion of the boundary wall positioned on a side of the opening portion extends toward the sealing target fluid side and inclined to a side of the dynamic pressure generation groove portion.

An annular sliding component disposed at a relative rotation point of a rotating machine, includes a plurality of positive pressure generation grooves arranged side by side in a circumferential direction on a sliding surface of the sliding component. The positive pressure generation grooves are configured for generating positive pressure by a sealing target fluid on the sealing target fluid side being introduced during the relative rotation of the sliding component and a sliding component. The positive pressure generation grooves have a plurality of leading edge portions at leading edges on a downstream side in a direction of the relative rotation. The plurality of leading edge portions are arranged side by side in the circumferential direction. At least part of the plurality of leading edge portions is disposed at different radial positions.

Provided is a sliding component capable of stably reducing the frictional resistance of a sliding surface entailing eccentric rotation. A sliding component has a sliding surface relatively sliding with eccentric rotation, in which the sliding surface includes a land and a plurality of dynamic pressure generation mechanisms arranged in a circumferential direction, the dynamic pressure generation mechanism includes a shallow groove portion and a deep groove portion, and the shallow groove portion surrounds a circumference of the deep groove portion and communicates with the deep groove portion.

Provided is a sliding component capable of stably reducing the frictional resistance of a sliding surface entailing eccentric rotation. A sliding component has an annular shape with high-pressure and low-pressure fluids facing inside and outside of the sliding component and has a sliding surface relatively sliding with eccentric rotation. The sliding surface is provided with a plurality of high-pressure grooves open to a space in which the high-pressure fluid exists and a plurality of low-pressure grooves open to a space in which the low-pressure fluid exists. The high-pressure and low-pressure grooves are arranged in a circumferential direction.

A sliding component has an annular shape with a fluid facing inside and outside of the sliding component and has a sliding surface relatively sliding with eccentric rotation, in which the sliding surface includes a land and a plurality of dynamic pressure generation mechanisms arranged in a circumferential direction, the dynamic pressure generation mechanism includes a shallow groove portion and a deep groove portion, the shallow groove portion communicates with the deep groove portion, and a communication passage providing a communication between the deep groove portion and either an inside space or an outside space of the sliding component is formed in the sliding component.

The disclosure relates to a bearing system for a drive turbine of a rotary atomizer, having a rotatable turbine shaft for receiving a bell cup which is used for spraying off the paint, and having a radial bearing for rotatably supporting the turbine shaft. The disclosure provides that the radial bearing has at least one foil bearing or a spiral groove bearing.

There is provided a sliding component that supplies a sealed fluid to a leakage side in a gap between sliding surfaces to exhibit high lubricity and has a small leakage of the sealed fluid. A sliding component has an annular shape and is disposed in a place where relative rotation is performed in a rotary machine. The sliding component includes a plurality of dynamic pressure generating mechanisms provided in a sliding surface of the sliding component. Each of the dynamic pressure generating mechanisms includes a deep groove portion that communicates with a leakage side, and a shallow groove portion that communicates with the deep groove portion and extends from the deep groove portion in a circumferential direction. An end portion in an extending direction of the shallow groove portion is formed into a tapered shape in a plan view.

There is provided a sliding component that supplies a sealed fluid to a leakage side in a gap between sliding surfaces to exhibit high lubricity and has a small leakage of the sealed fluid. A sliding component that has an annular shape and is disposed in a place where relative rotation is performed in a rotary machine, includes a plurality of dynamic pressure generating mechanisms provided in a sliding surface of the sliding component, each of the dynamic pressure generating mechanisms provided with a deep groove portion that communicates with a leakage side, and a shallow groove portion that communicates with the deep groove portion and extends in a circumferential direction.

A pair of sliding components formed in an annular shape and disposed at a relatively rotating position of a rotary machine are constituted by a first sliding component 10 and a second sliding component. A sliding surface of the first sliding component has a plurality of dynamic pressure generation mechanisms each of which includes at least a shallow groove communicating with a leakage side. A sliding surface of the second sliding component has deep grooves each of which has a dimension deeper than that of the shallow groove of each of the dynamic pressure generation mechanisms and communicates with the leakage side, each of the deep grooves overlapping with the shallow groove each of the dynamic pressure generation mechanisms during relative rotation of the first and second sliding components.