JP2009270609A

JP2009270609A - Sliding member

Info

Publication number: JP2009270609A
Application number: JP2008120806A
Authority: JP
Inventors: Tomokazu Miyaji; 智一宮治
Original assignee: Sanden Corp
Current assignee: Sanden Corp
Priority date: 2008-05-05
Filing date: 2008-05-05
Publication date: 2009-11-19

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding member superior in lubricating oil trapping performance, having a solid lubricant film formed on a substrate so that lubricating oil deposited on the solid lubricant film moves on the surface of the lubricant film while receiving centrifugal force. <P>SOLUTION: The sliding member 1 has the solid lubricant film 1b formed on the substrate 1a so that the lubricating oil deposited on the solid lubricant film 1b moves on the surface of the lubricant film 1b while receiving centrifugal force. A plurality of peripheral grooves 2 are concentrically formed in the surface of the solid lubricant film 1b. On the cross sections of the peripheral grooves along the moving direction of the lubricating oil, an angle formed between a direction of tending from groove top portions to groove bottom portions along the front side faces of the peripheral grooves 2 in the moving direction of the lubricating oil and the moving direction of the lubricating oil is ≤90°. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は摺動部材に関するものである。 The present invention relates to a sliding member.

基材上に固体潤滑剤被膜が形成され、当該固体潤滑剤被膜に付着した潤滑油が遠心力を受けて前記潤滑剤被膜表面上を移動する摺動部材であって、前記固体潤滑剤被膜の表面に同心状に複数の周溝が形成された摺動部材が特許文献１に開示されている。
特許文献１の摺動部材にあっては、遠心力を受けて移動中の潤滑油が周溝に捕獲されるので、固体潤滑剤被膜が潤滑油不足になり難く、固体潤滑剤被膜の磨耗や摺動部材の機能低下が防止される。
再公表ＷＯ２００２／０７５１７２号公報 A solid lubricant film is formed on a base material, and the lubricating oil attached to the solid lubricant film is a sliding member that moves on the surface of the lubricant film by receiving a centrifugal force. Patent Document 1 discloses a sliding member having a plurality of circumferential grooves formed concentrically on the surface.
In the sliding member of Patent Document 1, since the lubricating oil that is moving due to centrifugal force is trapped in the circumferential groove, the solid lubricant film is unlikely to run out of lubricating oil, Degradation of the function of the sliding member is prevented.
Republished WO2002 / 075172

特許文献１の摺動部材には、潤滑油移動方向に沿った周溝断面において、周溝の潤滑油移動方向前方の側面に沿って溝頂部から溝底部へ向かう方向と潤滑油移動方向とのなす角度が９０度よりも大きいので、移動中の潤滑油が周溝に捕獲されても周溝の潤滑油移動方向前方の側面を乗り越えて移動する可能性があり、固体潤滑剤被膜が潤滑不足になる可能性があるという問題がある。
本発明は上記問題に鑑みてなされたものであり、基材上に固体潤滑剤被膜が形成され、当該固体潤滑剤被膜に付着した潤滑油が遠心力を受けて前記潤滑剤被膜表面上を移動する摺動部材であって、特許文献１の摺動部材よりも潤滑油捕獲性能が優れた摺動部材を提供することを目的とする。 In the sliding member of Patent Document 1, in the circumferential groove cross-section along the lubricating oil movement direction, the direction from the groove top to the groove bottom along the front side surface of the circumferential groove in the lubricating oil movement direction and the lubricating oil movement direction Since the angle formed is greater than 90 degrees, there is a possibility that even if the moving lubricant is trapped in the circumferential groove, it may move over the side surface of the circumferential groove in the direction of lubricating oil movement, and the solid lubricant film is insufficiently lubricated There is a problem that it may become.
The present invention has been made in view of the above problems, and a solid lubricant film is formed on a base material, and the lubricant adhering to the solid lubricant film receives centrifugal force and moves on the surface of the lubricant film. An object of the present invention is to provide a sliding member that has a better lubricating oil capturing performance than the sliding member of Patent Document 1.

上記課題を解決するために、本発明においては、基材上に固体潤滑剤被膜が形成され、当該固体潤滑剤被膜に付着した潤滑油が遠心力を受けて前記潤滑剤被膜表面上を移動する摺動部材であって、前記固体潤滑剤被膜の表面に同心状に複数の周溝が形成され、潤滑油移動方向に沿った周溝断面において、周溝の潤滑油移動方向前方の側面に沿って溝頂部から溝底部へ向かう方向と潤滑油移動方向とのなす角度が９０度以下であることを特徴とする摺動部材を提供する。
本発明に係る摺動部材においては、潤滑油移動方向に沿った周溝断面において、周溝の潤滑油移動方向前方の側面に沿って溝頂部から溝底部へ向かう方向と潤滑油移動方向とのなす角度が９０度以下なので、前記角度が９０度よりも大きい特許文献１の摺動部材に比べて、周溝に捕獲された潤滑油は周溝の潤滑油移動方向前方の側面を乗り越えて移動し難い。従って、本発明に係る摺動部材は、特許文献１の摺動部材よりも潤滑油捕獲性能が優れている。 In order to solve the above-described problems, in the present invention, a solid lubricant film is formed on a base material, and lubricating oil attached to the solid lubricant film receives centrifugal force and moves on the surface of the lubricant film. A sliding member, wherein a plurality of circumferential grooves are formed concentrically on the surface of the solid lubricant film, and along a circumferential groove cross-section along the lubricating oil movement direction, along the side surface of the circumferential groove forward in the lubricating oil movement direction. The sliding member is characterized in that the angle formed by the direction from the groove top portion to the groove bottom portion and the lubricant oil moving direction is 90 degrees or less.
In the sliding member according to the present invention, in the circumferential groove cross-section along the lubricant movement direction, the direction from the groove top to the groove bottom along the front side surface of the circumferential groove in the lubricant movement direction and the lubricant movement direction Since the angle formed is 90 degrees or less, as compared with the sliding member of Patent Document 1 in which the angle is greater than 90 degrees, the lubricating oil trapped in the circumferential groove moves over the side surface of the circumferential groove in the direction of lubricating oil movement. It is hard to do. Therefore, the sliding member according to the present invention is superior in lubricating oil capturing performance to the sliding member of Patent Document 1.

本発明により、特許文献１の摺動部材よりも潤滑油捕獲性能が優れた摺動部材が提供される。 According to the present invention, a sliding member having a lubricating oil capturing performance superior to that of Patent Document 1 is provided.

本発明の実施例に係る摺動部材を説明する。
図１（ａ）と図２とに示すように、図示しないシューに対して相対摺動する斜板式圧縮機の斜板１は、円板状の鋼製基板１ａと、鋼製基板１ａの両端面上に形成された固体潤滑剤被膜１ｂとを備えている。固体潤滑剤として二硫化モリブデン、グラファイト、フッ素樹脂等が使用されている。
固体潤滑剤被膜１ａの表面に同心状に複数の互いに独立した周溝２が形成されている。図２（ａ）、（ｂ）から分かるように、斜板１に従動して回転することによって発生する遠心力を受けた固体潤滑被膜１ｂ上の潤滑油の移動方向に沿った周溝断面において、周溝２の潤滑油移動方向前方の側面に沿って溝頂部から溝底部へ向かう方向（細線矢印の方向）と潤滑油の移動方向（太線矢印の方向）とのなす角度は９０度以下に設定されている。
斜板１においては、潤滑油の移動方向に沿った周溝断面において、周溝２の潤滑油移動方向前方の側面に沿って溝頂部から溝底部へ向かう方向と潤滑油移動方向とのなす角度が９０度以下なので、前記角度が９０度よりも大きい特許文献１の摺動部材に比べて、周溝２に捕獲された潤滑油は周溝２の潤滑油移動方向前方の側面を乗り越えて移動し難い。従って、斜板１は、特許文献１の摺動部材よりも潤滑油捕獲性能が優れている。 A sliding member according to an embodiment of the present invention will be described.
As shown in FIGS. 1 (a) and 2, a swash plate 1 of a swash plate compressor that slides relative to a shoe (not shown) includes a disk-shaped steel substrate 1a and both ends of the steel substrate 1a. And a solid lubricant film 1b formed on the surface. As the solid lubricant, molybdenum disulfide, graphite, fluororesin, etc. are used.
A plurality of independent circumferential grooves 2 are formed concentrically on the surface of the solid lubricant film 1a. As can be seen from FIGS. 2 (a) and 2 (b), in the circumferential groove cross section along the moving direction of the lubricating oil on the solid lubricating coating 1b subjected to the centrifugal force generated by the rotation following the swash plate 1. The angle between the direction from the groove top to the groove bottom (in the direction of the thin line arrow) and the direction of movement of the lubricating oil (in the direction of the thick line arrow) along the side surface of the circumferential groove 2 in the direction of moving the lubricating oil is 90 degrees or less. Is set.
In the swash plate 1, the angle formed by the direction from the groove top portion toward the groove bottom portion along the side surface of the circumferential groove 2 in the lubricating oil moving direction and the lubricating oil moving direction in the circumferential groove cross-section along the lubricating oil moving direction. Since the angle is 90 degrees or less, as compared with the sliding member of Patent Document 1 in which the angle is larger than 90 degrees, the lubricating oil trapped in the circumferential groove 2 moves over the front side surface of the circumferential groove 2 in the lubricating oil movement direction. It is hard to do. Therefore, the swash plate 1 is superior in lubricating oil capture performance to the sliding member of Patent Document 1.

同心状の複数の周溝２は、図２（ｂ）に示すように一本の渦巻き状の溝によって形成しても良く、図２（ｃ）に示すように複数の円弧状の溝を所定間隔で周方向に並べて形成しても良い。周溝２は円形でも楕円形でも良い。溝の径方向や周方向のピッチは一定でも良く不定でも良い。
周溝２の潤滑油移動方向前方の側面に沿って溝頂部から溝底部へ向かう方向と斜板に従動して回転することによって発生する遠心力を受けた固体潤滑被膜上の潤滑油の移動方向とのなす角度が９０度未満の場合、前記側面は溝頂部から溝底部へ向けて潤滑油移動方向に凸に湾曲していても良い。周溝２の潤滑油移動方向後方の側面の断面形状はどのような形状でも良い。 The plurality of concentric circumferential grooves 2 may be formed by a single spiral groove as shown in FIG. 2 (b), or a plurality of arc-shaped grooves as shown in FIG. 2 (c). They may be formed side by side in the circumferential direction at intervals. The circumferential groove 2 may be circular or elliptical. The pitch in the radial direction and circumferential direction of the groove may be constant or indefinite.
Lubricating oil moving direction of the circumferential groove 2 The direction of moving the lubricating oil on the solid lubricating film subjected to the centrifugal force generated by rotating in the direction from the groove top to the groove bottom along the front side surface and following the swash plate When the angle between the side surface and the groove is less than 90 degrees, the side surface may be convexly curved in the lubricating oil moving direction from the groove top to the groove bottom. The cross-sectional shape of the side surface of the circumferential groove 2 on the rear side in the lubricating oil movement direction may be any shape.

本発明は、斜板式圧縮機の斜板のみならず、斜板式圧縮機のシュー（斜板対して公転すると共に自転するので、シュー表面に付着した潤滑油はシューに従動して回転することにより発生した遠心力を受けて移動する）、シューを受け入れるピストンの球面凹部（シューの表面に付着した潤滑油が移動するのに従動して球面凹部表面に付着した潤滑油も移動する）、圧縮機の駆動軸の軸封装置に使用されるリップシール（駆動軸に従動して回転する駆動軸表面に付着した潤滑油が遠心力を受けリップシールを伝わって移動する）等、基材上に固体潤滑剤被膜が形成され、当該固体潤滑剤被膜に付着した潤滑油が遠心力を受けて前記潤滑剤被膜表面上を移動する摺動部材に広く使用可能である（リップシールは一般にフッ素樹脂の無垢材であるが、フッ素樹脂の基材にフッソ樹脂の被膜が形成されたと見なし得る）。 In the present invention, not only the swash plate of the swash plate type compressor but also the shoe of the swash plate type compressor (revolves and rotates with respect to the swash plate, so that the lubricating oil adhering to the shoe surface rotates by following the shoe and rotating. (Moves in response to the generated centrifugal force), spherical recess of the piston that receives the shoe (the lubricant attached to the surface of the spherical recess also moves as the lubricant attached to the surface of the shoe moves), compressor A lip seal used in the shaft seal device of the drive shaft (the lubricating oil attached to the surface of the drive shaft that rotates following the drive shaft moves through the lip seal under centrifugal force), etc. A lubricant film is formed, and the lubricating oil adhering to the solid lubricant film can be widely used for sliding members that move on the surface of the lubricant film under centrifugal force. Although it is a material Be regarded as a coating of fluorine resin is formed on a base material of fluorine resin).

本発明の実施例に係る斜板式圧縮機の斜板の正面図である。It is a front view of the swash plate of the swash plate type compressor which concerns on the Example of this invention. 図１（ａ）のII-II矢視図である。It is the II-II arrow line view of Fig.1 (a).

符号の説明Explanation of symbols

１斜板式圧縮機の斜板
１ａ基材
１ｂ固体潤滑剤被膜
２周溝 DESCRIPTION OF SYMBOLS 1 Swash plate of swash plate type compressor 1a Base material 1b Solid lubricant film 2 Circumferential groove

Claims

基材上に固体潤滑剤被膜が形成され、当該固体潤滑剤被膜に付着した潤滑油が遠心力を受けて前記潤滑剤被膜表面上を移動する摺動部材であって、前記固体潤滑剤被膜の表面に同心状に複数の周溝が形成され、潤滑油移動方向に沿った周溝断面において、周溝の潤滑油移動方向前方の側面に沿って溝頂部から溝底部へ向かう方向と潤滑油移動方向とのなす角度が９０度以下であることを特徴とする摺動部材。 A solid lubricant film is formed on a base material, and a lubricating member attached to the solid lubricant film is a sliding member that moves on the surface of the lubricant film by receiving a centrifugal force. A plurality of circumferential grooves are formed concentrically on the surface, and in the circumferential groove cross-section along the lubricating oil movement direction, the lubricating oil moves in the direction from the groove top to the groove bottom along the front side of the circumferential groove in the lubricating oil movement direction. A sliding member characterized in that an angle formed with a direction is 90 degrees or less.