JP2008002662A - Rotary sliding member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary sliding member showing sliding performance equal to or higher than a conventional one by allowing the thermocompression-bonding of resin sheets in a favorable workable manner. <P>SOLUTION: The rotary sliding member 8 comprises a base material 1 having a rotary face inclined to a center line passing through a point C for rotating around the center line, and a ring-shaped sliding layer 2 formed on at least part of the rotary face and located around a driving shaft. The sliding layer 2 is composed of a plurality of resin sheets 2s arrayed in the peripheral direction and thermocompression-bonded to the rotary face. Preferably, the plurality of resin sheets 2s are resin sheet pieces which have shapes defined by an inside circular arc 22s located at the inner periphery side 22 of the sliding layer 2, an outside circular arc 21s located at the outer periphery side 21 of the sliding layer 2 and having the same center as the inside circular arc 22s, and a line segment 23s and a line segment 24s having both ends connecting the inside circular arc 22s to the outside circular arc 21s without crossing each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sliding member having a sliding layer made of a resin film attached to the surface of a substrate, and more particularly to a rotating sliding member that is in sliding contact with a mating member while rotating.

  A sliding member in which a resin sliding layer is formed on the surface of a base material such as a steel plate to provide low friction and seizure resistance is used in a wide range of fields. As a method of manufacturing a sliding member having a resin-made sliding layer, sliding is performed by applying a resin as a paint to the surface of the base material or molding a molten resin on the surface of the base material. It is common to form layers.

  For example, in Patent Document 1, a continuous resin film layer (sliding layer) having a complicated shape is formed on the surface of a base material using a paint in which solid lubricant fine particles are dispersed in a solution obtained by dissolving a binder resin in a solvent. Is forming. The sliding layer is formed by applying or printing a paint on the surface of a substrate to form a sliding film, and then curing the sliding film. Patent Document 2 discloses a sliding member having a sliding layer formed by thermocompression bonding a resin film on the surface of a base material.

However, the sliding film formed using a paint is likely to swell and sag on the surface. Since the surface state of the sliding film affects the cured sliding layer, the surface of the sliding layer is subjected to processing such as polishing. On the other hand, a sliding layer formed by thermocompression bonding a resin film has a uniform thickness and surface state. On the other hand, depending on the shape of the resin film, if heat is applied to the resin film, the resin film is likely to wrinkle or positioning is difficult, and if the surface to be thermocompression bonded is a large area, the distribution of surface pressure Tends to be uneven. In particular, uneven surface pressure and surface wrinkles affect the slidability of the sliding member. Furthermore, since the resin film is usually used by being cut out from a belt-shaped film, the sliding layer is surrounded by concentric circles and has a continuous ring shape like the swash plate of a swash plate compressor (see, for example, FIG. 8). ) Depending on the area of the sliding layer, there may be more parts that are not used than parts that are used to form the sliding layer.
JP 2004-52998 A JP 2006-45493 A

  Therefore, in view of the above problems, the present inventors usually thermocompression-bonded by dividing a sliding layer formed from one resin sheet (resin film) into a plurality of resin sheets. We paid attention to the improvement of workability. Moreover, in a sliding member (rotating sliding member) that is in sliding contact with a mating member while rotating like a swash plate of a swash plate compressor, a sliding layer is formed using a plurality of divided resin sheets. Furthermore, the inventors have conceived that there is almost no adverse effect on the slidability, and that the slidability is improved by adjusting the shape and arrangement position of the plurality of resin sheets.

  That is, an object of the present invention is to provide a rotary sliding member capable of thermocompression bonding a resin sheet with good workability and exhibiting slidability equivalent to or higher than that of the conventional one.

The rotary sliding member of the present invention includes a base material that rotates around a center line and has a rotation surface inclined with respect to the center line, and is formed on at least a part of the rotation surface and around the center line. A ring-shaped sliding layer located on the rotary sliding member,
The sliding layer is composed of a plurality of resin sheets arranged in the circumferential direction and thermocompression bonded to the rotating surface.

  The sliding layer preferably has a groove portion formed by a gap provided between the resin sheets adjacent in the circumferential direction. The above “ring-shaped sliding layer” is not only a sliding layer in which a plurality of resin sheets are continuous in the circumferential direction without a gap, but also a discontinuous having a gap in which no resin sheet is formed. Also includes a sliding layer. That is, the sliding layer should just be comprised by the ring shape as a whole.

  The plurality of resin sheets include an inner arc located on the inner circumference side of the sliding layer, an outer arc located on the outer circumference side of the sliding layer and having the same center as the inner arc, the inner arc and A resin sheet piece having a shape defined by two non-intersecting line segments connecting the outer arc at both ends is preferable. Here, the line segment “does not intersect” means that two line segments do not intersect each other, and a line segment extending from one end of any arc does not intersect the arc.

  The line segment of the resin sheet piece may coincide with the radial direction of the inner arc and the outer arc, or the line segment of the resin sheet piece may be inclined with respect to the radial direction of the arc.

  The base material is preferably a swash plate of a swash plate compressor.

  In the rotary sliding member of the present invention, the ring-shaped sliding layer is composed of a plurality of resin sheets (resin sheet pieces) arranged in the circumferential direction and thermally bonded to the rotating surface. That is, the sliding layer of the rotary sliding member of the present invention is formed by thermocompression bonding of a plurality of resin sheets, but rather than forming a similar sliding layer by thermocompression bonding of a single resin sheet. The thermocompression bonding can be performed with good workability. Specifically, since the resin sheet is divided into a plurality of sheets, the resin sheet can be easily handled even when heat is applied or pressed, and positioning on the rotating surface is easy. In addition, wrinkles on the resin sheet and deformation of the resin sheet are reduced. Therefore, the slidability of the obtained sliding layer is maintained. Furthermore, it is possible to uniformly apply a surface pressure to a single resin sheet that has been divided to reduce the area, and to perform thermocompression bonding, or to control the surface pressure applied to each resin sheet that constitutes the sliding layer equally. It is easy to do. As a result, the resin sheet adheres well to the rotating surface of the base material, and peeling of the sliding layer is reduced.

  Further, since the ring-shaped sliding layer is composed of a plurality of resin sheets, each resin sheet can be cut out from a large-area resin film without waste. As a result, compared with a case where one resin sheet having the same area is cut out in a ring shape, the area of the portion discarded without being used is reduced.

  The rotating sliding member of the present invention shows a desired sliding property with almost no adverse effect on the sliding property even if the ring-shaped sliding layer is composed of a plurality of resin sheets. At this time, if a gap is provided between the resin sheets adjacent in the circumferential direction and the groove portion formed by the gap is formed in the sliding layer, the lubricating oil is retained in the groove portion during sliding, so that the slidability is improved. . Furthermore, the rotational sliding member of the present invention exhibits a low coefficient of friction by changing the shape and arrangement position of the plurality of resin sheets and adjusting the dimensions of the grooves and the inclination with respect to the rotational direction.

  The rotary sliding member of the present invention is a sliding part of various devices and can be used for a part having a configuration in which the rotating member is in sliding contact with the mating member, but is particularly suitable as a swash plate of a swash plate type compressor. Can be used.

  Below, the best form for implementing the rotation sliding member of this invention is demonstrated using FIGS. 1-3.

  The rotary sliding member of the present invention includes a base material that rotates around a center line and has a rotation surface that is inclined with respect to the center line, and is formed on at least a part of the rotation surface and positioned around the center line. And a ring-shaped sliding layer.

  The substrate rotates around a center line, but preferably rotates integrally with a drive shaft that rotates around the center line. Therefore, it is preferable that at least a part of the base material is fixed to a drive shaft that rotates by inputting a rotational force. At this time, the substrate has a rotating surface inclined with respect to the center line. That is, the base material does not include a state in which the center line is positioned on the rotation surface, and the rotation surface and the center line may intersect at an angle. For example, the center line may be perpendicular to the rotation plane, and the inclination of the rotation plane with respect to the center line may be variable. The shape of the substrate is not particularly limited, but is preferably a plate-like body having a rotating surface on the front and back surfaces, for example. The plate-like body is preferably a disk because the substrate rotates, and the center of the disk and the center line may cross each other.

  A swash plate of a swash plate compressor is given as a specific example of the base material that satisfies the above-described configuration. The swash plate compressor mainly has a housing, a drive shaft that is rotatably supported by the housing, and an inclined surface (rotation surface) that rotates integrally with the drive shaft in the housing and is inclined with respect to the drive shaft. A swash plate and a shoe that slides in contact with the inclined surface and swings with the rotation of the swash plate. At this time, the shoe is restricted from rotating around the center line of the drive shaft. Note that the inclination of the inclined surface may be variable like a swash plate of a swash plate type variable capacity compressor. The configuration of the swash plate compressor will be specifically described with reference to FIG. The drive shaft 90 is accommodated in a swash plate chamber 94 formed by a cylinder block 92 and a front housing 93, and is rotatably supported by a radial bearing. A plurality of bores 95 are disposed in the cylinder block 92 at positions surrounding the drive shaft 90. A single-headed piston 96 is fitted in each bore 95 so as to reciprocate. In the swash plate chamber 94, a rotor 97 is coupled to the drive shaft 90, and a swash plate 98 is fitted behind the rotor 97. In particular, if the swash plate compressor is of a variable capacity type, the swash plate 98 can be tilted around a fulcrum. The inclination displacement of the plate 98 is controlled. The swash plate 98 is formed with a smooth sliding contact surface 98p on the outer peripheral side of both inclined surfaces, and the sliding surface 99p of the shoe 99 is in contact with the sliding contact surface 98p. The shoe 99 is engaged with the hemispherical seat 96p of the piston 96. When the piston 96 is linked to the swash plate 98 through the shoe 99, the rotational motion of the swash plate 98 is converted into the linear motion of the piston 96, and the medium is compressed.

  In addition to the swash plate of the swash plate compressor, the rotary sliding member of the present invention includes a thrust washer of a device having a rotating mechanism.

  There is no particular limitation on the material of the base material, but it is preferable that it is made of metal. For example, it preferably contains at least one of iron, aluminum, copper and magnesium. For example, as an alloy, steel, an aluminum alloy containing Mg, Cu, Zn, Si, Mn, or the like, a copper alloy containing Zn, Al, Sn, Mn, or the like are preferable. In addition, a sliding layer is formed on the rotating surface of the substrate. At least the surface of the substrate on which the sliding layer is formed has a surface roughness of 0.01 to 10 μmRz in terms of a ten-point average roughness (JIS). It is preferable. If it is 0.01 micrometer Rz or more, the adhesiveness of a base material and a sliding layer will improve, and if it is 10 micrometer Rz or less, since the influence on the surface (sliding contact surface) of a sliding layer becomes small, it is preferable.

  The sliding layer is formed on at least a part of the rotating surface of the substrate. Since the base material rotates around the center line as described above, the locus of one point on the rotation surface is a circumference located around the center line. Therefore, the sliding layer has a ring shape positioned around the center line, and the surface of the sliding layer is a sliding contact surface that is in sliding contact with the mating member. The sliding layer may be formed in a range surrounded by concentric circles having different radii. At this time, the center of the concentric circle is preferably an intersection of the rotation surface and the center line.

  The sliding layer is made of a resin sheet that is thermocompression bonded to at least a part of the rotating surface of the substrate. The resin sheet is not particularly limited as long as it can be thermocompression bonded to the rotating surface of the substrate, and may be selected according to the required sliding characteristics. For example, the resin sheet may contain a polyaryl ketone resin at least in the surface layer portion. Polyaryl ketone resins have high mechanical strength among thermoplastic resins, and are excellent in heat resistance, flame retardancy, wear resistance, chemical resistance, hydrolysis resistance, and the like. Therefore, a sliding layer comprising at least a surface layer portion containing a polyaryl ketone resin and having the surface layer portion as a sliding surface exhibits excellent sliding characteristics even under severe use conditions.

  Examples of the polyaryl ketone resin include polyether ether ketone (PEEK) resin and polyether ketone resin. However, when using a resin sheet made of a polyaryl ketone resin, the polyaryl ketone resin has a high melting point and is difficult to melt. Therefore, it is necessary to use a highly heat-resistant base material that does not deteriorate even when thermocompression bonded at a high temperature. On the other hand, if it is a resin sheet containing a polyaryl ketone resin and a thermoplastic polyimide resin that are compatible with each other, it exhibits fluidity suitable for adhesion even at a low temperature of 340 ° C. or lower. Further, the resin sheet may be a laminated sheet composed of an adhesive layer excellent in adhesion to the substrate even if it is low-temperature thermocompression bonding, and a surface layer laminated on the adhesive layer and containing a polyaryl ketone resin. Good. As the adhesive layer, an adhesive layer coated with a thermosetting resin such as an epoxy resin, an adhesive layer containing a thermoplastic polyimide resin and a polyaryl ketone resin, or the like can be used. As the thermoplastic polyimide resin, polyetherimide (PEI) is preferable.

  The resin sheet may further contain a solid lubricant. If a resin sheet containing a solid lubricant is used, the sliding characteristics of the sliding layer are improved. Solid lubricants include fluorine resins such as polytetrafluoroethylene (PTFE), fluorine compounds such as graphite fluoride and calcium fluoride, sulfides such as molybdenum disulfide and tungsten disulfide, and layered structures such as graphite and talc. , Pb, Ag, Cu, and other soft metals and their compounds may be used as long as they are usually used as solid lubricants. In addition, titanium oxide, tungsten carbide, boron nitride, melamine cyanurate, etc. can be used.

  The film disclosed in JP 2006-45493 A (Patent Document 2) can be suitably used as a resin sheet in the present invention.

  Although there is no limitation in particular in the thickness of a resin sheet, it is good in it being 1-100 micrometers. Within this range, a uniform sliding layer can be formed by thermocompression bonding. In addition, the thickness of the resin sheet is substantially equal to the thickness of the sliding layer.

  Usually, when a ring-shaped sliding layer is formed on the surface of a substrate, for example, as shown in FIG. 8 or FIG. 1 of Patent Document 1, a continuous film (resin sheet) is formed on the substrate. A sliding layer is formed on the surface of the substrate by adhering to the surface. In the rotary sliding member of the present invention, the ring-shaped sliding layer is composed of a plurality of resin sheets thermocompression bonded to the rotating surface. The plurality of resin sheets are arranged in the circumferential direction to form a ring-shaped sliding layer. There is no particular limitation on the shape of each of the plurality of resin sheets constituting the ring-shaped sliding layer, and the resin sheets are arranged so as to exhibit a ring shape within a predetermined range when the plurality of resin sheets are arranged in the circumferential direction. That's fine. At this time, the two resin sheets are adjacent to each other in the circumferential direction, but the two resin sheets may be brought into contact with each other or arranged at a predetermined interval. . However, if there is an overlapping portion between adjacent resin sheets, the slidability decreases. Further, when a plurality of resin sheets are arranged with a predetermined interval between resin sheets adjacent in the circumferential direction, a sliding layer having a groove portion formed by a gap provided between the resin sheets is formed. The groove portion serves as an oil retaining groove for lubricating oil when the rotary sliding member of the present invention is in sliding contact with the mating member. At this time, it is desirable that the groove width is in a range of 0.015 to 3 mm. Lubricating oil is satisfactorily supplied to the sliding surface during sliding with the counterpart material, and the friction coefficient is lowered.

  When the sliding layer is formed in a range surrounded by concentric circles having different radii, the plurality of resin sheets are positioned on the inner arc of the sliding layer and on the outer peripheral side of the sliding layer. The resin sheet piece may have a shape partitioned by an outer arc having the same center as the inner arc and two non-intersecting line segments connecting the inner arc and the outer arc at both ends. Below, the sliding layer formed using the resin sheet piece is demonstrated using FIG.

  FIG. 1 is a front view of a swash plate of a swash plate compressor. FIG. 1 schematically shows the main part of the swash plate, and details are omitted for the sake of explanation. The swash plate 8 includes a disc 1 that is a perfect base material when viewed from the front, and a sliding layer 2 formed on the sliding contact surface 8 p side of the disc 1. The disc 1 has an insertion hole 80 at the center thereof for inserting and fixing the drive shaft. In FIG. 1, point C indicates a point through which the center line of the drive shaft passes. That is, the front and back surfaces of the disc 1 are rotating surfaces that are inclined with respect to the center line, and FIG. 1 is a view showing one rotating surface as a front surface. The disc 1 has a sliding layer 2 on the outer peripheral side of its front and back surfaces (rotating surfaces). The sliding layer 2 is formed in a range surrounded by concentric circles having different radii, and an outer periphery 21 that is a circumference along the outer shape of the disk 1 around the point C, and a circumference of a circle around the point C And an inner circumference 22.

  The sliding layer 2 includes a plurality (six in FIG. 1) of resin sheet pieces 2s arranged in the circumferential direction. The resin sheet piece 2s is a part of the circumference centered on the point C and the inner arc 22s located on the inner circumference 22 side of the sliding layer 2, and a part of the circumference centered on the point C. Thus, the outer arc 21s located on the outer periphery 21 side of the sliding layer 2 and a non-intersecting two line segments 23s and 24s connecting the inner arc 22s and the outer arc 21s at both ends are formed. In FIG. 1, the line segments 23s and 24s are straight lines, but may be curved lines. Further, in FIG. 1, the line segments 23s and 24s of the resin sheet piece 2s are formed by rotating the disc 1 with an angle θ with respect to the radial direction of the inner arc 22s and the outer arc 21s around the one end P3 or P4 of the inner arc 22s. Slope in direction (indicated by arrow). The range of the angle θ may be 90 ° or less, and if θ = 0 °, the line segment of the resin sheet piece 2s matches the radial direction of the inner arc 22s and the outer arc 21s. The range of the angle θ is not particularly limited, but is more preferably 0 ° to 45 ° and 25 ° to 35 °. In FIG. 1, the line segments 23s and 24s are both inclined at the same angle with respect to the radial direction, but may be at different angles.

  The lengths of the inner arc 22s and the outer arc 21s are defined by the center angle φ. The value of the central angle φ is not particularly limited, but is preferably 3 ° to 90 °, more preferably 5 ° to 30 °. If φ is less than 3 °, the number of resin sheet pieces constituting one sliding layer becomes extremely large, which may cause a decrease in slidability, which is not preferable. On the other hand, if φ exceeds 90 °, the resin sheet piece becomes large, which is not desirable because workability in thermocompression bonding is lowered. Further, as will be described later in the column of Examples, the larger φ is, the more waste is generated when cutting out a resin sheet piece from a large-area resin film. Therefore, the value of φ should be kept small. In FIG. 1, the center angles of the inner arc 22s and the outer arc 21s are the same, but they may be different. In FIG. 1, the plurality of resin sheets are made of resin sheet pieces having the same shape, but may be different shapes. However, if it is the same shape, the waste at the time of cutting out a resin sheet piece from a large-area resin film is reduced.

  As shown in FIG. 1, the rotary sliding member of the present invention may be thermocompression bonded to the base material 1 continuously without gap between the resin sheet pieces 2 s adjacent in the circumferential direction. A groove formed of a gap provided between the resin sheet piece and the other resin sheet piece may be formed in the sliding layer. Hereinafter, the sliding layer having the groove will be described with reference to FIGS. 2 and 3.

FIG. 2 is a front view of the swash plate of the swash plate compressor, and shows a part of the sliding layer. The swash plate 8 ′ shown in FIG. 2 is the same as the swash plate 8 already described except for the shape and arrangement of the resin sheet piece 2s ′. The resin sheet piece 2s 'includes an inner arc 22s' located on the inner circumference 22 'side of the sliding layer 2' and an outer arc located on the outer circumference 21 'side of the sliding layer and having the same center as the inner arc 22s'. 21 s ′ and two line segments 23 s ′ and 24 s ′ that intersect the inner circular arc 22 s ′ and the outer circular arc 21 s ′ at both ends and have a shape partitioned. The resin sheet piece 2s ′ adjacent in the circumferential direction is disposed with a predetermined width between the line segment 23s ′ of one resin sheet piece 2s ′ and the line segment 24s ′ of the other resin sheet piece 2s ′. At this time, the gap provided between the resin sheet pieces 2s ′ forms a groove 25. FIG. 3 shows the XX ′ cross section of FIG. 2, where the groove width of the groove portion 25 is w, and the depth thereof corresponds to the thickness t of the resin sheet piece 2 s ′. At this time, the groove width w is preferably 3 mm or less, further 0.015 to 2 mm, and the depth t is 1 to 100 μm. When w = 0, no groove is formed, and for example, a sliding layer as shown in FIG. 1 is formed. The groove width w is preferably constant with respect to the direction in which the groove extends. For example, as shown in FIG. 2, when the center angle φ of the inner arc and the outer arc of the resin sheet is equal, the groove width w ₁ one end of the groove located on the side, the groove width w ₂ of the other end of the groove located on the inner periphery side, a difference in results. Even when there is a difference in the groove width between one end and the other end of the groove portion, the groove width may be in the above range, but it is desirable that the difference in the groove width between the one end and the other end is 0.7 mm or less, There is no significant effect on slidability.

  The method for thermocompression bonding the resin sheet is not particularly limited, and the resin sheet is rotated on the surface of the rotating surface of the substrate by pressing at least the surface portion of the resin sheet in contact with the substrate while being heated to an appropriate temperature. Can be fixed. There are no particular limitations on the temperature and pressure conditions, and the conditions may be appropriately selected according to the material of the resin sheet. For example, as a temperature condition, it is good to hold | maintain the temperature of the grade which the elasticity modulus of the surface part which contacts at least a base material of a resin sheet falls moderately, and shows fluidity | liquidity suitable for adhesion | attachment. In order to heat at least the surface portion of the resin sheet that contacts the substrate, the resin sheet itself may be heated, at least the surface of the substrate may be heated, or both the resin sheet and the substrate are heated. May be. In addition, the resin sheet may be thermocompression-bonded by heating by pressing the base material and / or the resin sheet and then placing it on a predetermined position of the base material, or at a predetermined position of the base material. After mounting, it may be thermocompression bonded by heating while applying pressure. Regarding thermocompression bonding, an optimal method may be selected in accordance with the shape and material of the resin sheet and the substrate.

  As mentioned above, although embodiment of the rotation sliding member of this invention was described, this invention is not limited to the said embodiment. The present invention can be implemented in various forms without departing from the gist of the present invention, with modifications and improvements that can be made by those skilled in the art.

  Based on the above embodiment, a disk-shaped test piece simulating a swash plate of a swash plate compressor was produced.

  As a base material, a disk made of carbon steel and having a diameter of 100 mm and a thickness of 6 mm (surface roughness 5 μm Rz) was prepared. Moreover, the belt-shaped laminated film (thickness 50 micrometers) which consists of two layers of the surface layer which consists of PEEK resin, and the contact bonding layer which consists of PEEK resin and PEI resin was prepared. A resin sheet was cut out from the laminated film into a desired shape. The resin sheet has an outer arc that is a part of the circumference with a radius of 50 mm, an inner arc that is a part of the circumference with a radius of 35 mm and the same center as the outer arc, and is drawn at both ends of these two arcs. A resin sheet piece having a shape surrounded by two line segments was used. In each of the following examples, resin sheet pieces having different inclinations θ with respect to the radial direction of two line segments and center angles φ of two arcs were used.

[Example 1 (Test piece # 1)]
In Example 1, test piece # 1 having a ring-shaped sliding layer on the surface of the disk was produced by thermocompression bonding of the resin sheet piece to the surface of the disk. Hereinafter, Example 1 will be described with reference to FIG. FIG. 4 is a front view of the test pieces prepared in Examples 1 to 4 and 6, but only a part of the resin sheet piece is illustrated.

  As resin sheet pieces, 36 resin sheet pieces 4s having a central angle φ of two arcs of 9.8 ° and an inclination θ with respect to the radial direction of the two line segments of 0 ° (the line segments coincide with the radial direction). Prepared. This resin sheet piece 4 s was thermocompression bonded to the surface of the disk 10. First, one resin sheet piece 4s was heated to 280 ° C. Next, the heated resin sheet piece 4 s was placed at a predetermined position of the disk 10 so that the adhesive layer side was in contact with the surface of the disk 10. At this time, the resin sheet piece 4 s was placed so that the outer arc of the resin sheet piece 4 s was along the outer periphery of the disk 10. The resin sheet 4 s was placed on the surface of the disk 10 and pressed to attach the resin sheet piece 4 s to the surface of the disk 10. This was repeated 36 times, and 36 resin sheet pieces 4 s were attached at equal intervals in the circumferential direction to form the ring-shaped sliding layer 4 on the surface of the disk 10.

In the obtained test piece # 1, 36 oil retaining grooves 45 extending in the radial direction were formed every 10 ° (hereinafter, “pitch” is abbreviated as ω = 10 °). The groove width of all the oil retaining grooves 45 (that is, the interval between the adjacent resin sheet pieces 4s) is 0. It was 015 mm. Hereinafter, the groove width at a radius of 42.5 mm is referred to as “groove width w ₀ ”. Further, the depth t of the groove was 50 μm.

[Example 2 (Test piece # 2)]
Test piece # 2 was produced in the same manner as in Example 1 except that the central angle φ of the resin sheet piece 4s was 9.3 °. By changing the center angle φ, the groove width w ₀ became 0.050 mm.

[Example 3 (Test piece # 3)]
Test piece # 3 was produced in the same manner as in Example 1 except that the central angle φ of the resin sheet piece 4s was 8.7 °. By changing the central angle φ, the groove width w ₀ became 0.100 mm.

[Example 4 (test piece # 4)]
As the resin sheet pieces, 12 resin sheet pieces 4s were prepared in which the central angle φ of the two arcs was 29.3 ° and the inclination θ with respect to the radial direction of the two line segments was 0 °. This resin sheet piece 4 s was thermocompression bonded to the surface of the disk 10. First, one resin sheet piece 4s was heated to 280 ° C. Next, the heated resin sheet piece 4 s was placed at a predetermined position of the disk 10 so that the adhesive layer side was in contact with the surface of the disk 10. At this time, the resin sheet piece 4 s was placed so that the outer arc of the resin sheet piece 4 s was along the outer periphery of the disk 10. The resin sheet piece 4 s was placed on the surface of the disk 10 and pressed against the disk 10 to attach the resin sheet piece 4 s to the surface of the disk 10. This was repeated 12 times, and 12 resin sheet pieces 4 s were attached at equal intervals in the circumferential direction to form the ring-shaped sliding layer 4 on the surface of the disk 10.

The obtained test piece # 4 was formed with 12 oil retaining grooves 45 extending in the radial direction at a pitch of ω = 30 °. The groove width w ₀ of all the oil retaining grooves 45 was 0.050 mm.

  In addition, arrangement | positioning at the time of cutting out the resin sheet piece 4s used for the present Example from a laminated film is shown in FIG. In order to cut out a plurality of resin sheet pieces 4s from the laminated film 40 in a wasteful arrangement, the resin sheet pieces 4s were continuously arranged in a strip shape as shown in FIG. In this case, the area of the cut resin sheet piece 4s was 90% when the area of the laminated film 40 was 100%.

[Example 5 (test piece # 5)]
FIG. 6 is a front view of a test piece produced in this example, but only a part of the resin sheet piece is illustrated.

  As resin sheet pieces, 12 resin sheet pieces 6s having a central angle φ of two arcs of 29.3 ° and an inclination θ with respect to the radial direction of two line segments of 30 ° were prepared. This resin sheet piece 6 s was thermocompression bonded to the surface of the disk 10. First, one resin sheet was heated to 280 ° C. Next, the heated resin sheet piece 6 s was placed at a predetermined position on the disk 10 so that the adhesive layer side was in contact with the surface of the disk 10. At this time, the resin sheet piece 6 s was placed such that the outer arc of the resin sheet piece 6 s was along the outer periphery of the disk 10. The resin sheet piece 6 s was placed on the surface of the disk 10. The resin sheet piece 6 s was placed on the surface of the disk 10 and pressed against the disk 10 to attach the resin sheet piece 6 s to the surface of the disk 10. This was repeated 12 times, and 12 resin sheet pieces 6 s were attached at equal intervals in the circumferential direction to form a ring-shaped sliding layer 6 on the surface of the disk 10.

In the obtained test piece # 5, 12 pitches of the oil retaining grooves 65 extending in the radial direction were formed at ω = 30 °. The groove width w ₀ of all the oil retaining grooves 65 was 0.050 mm.

[Example 6 (test piece # 6)]
Test piece # 2 was produced in the same manner as in Example 1 except that the central angle φ of the resin sheet piece 4s was set to 7.3 °. By changing the central angle φ, the groove width w ₀ became 0.200 mm.

  In addition, in order to cut out the resin sheet 4s used in the present example from the laminated film with less waste, the resin sheet pieces 4s were continuously arranged in a strip shape in the same manner as in Example 4. In this case, the area of the cut resin sheet piece 4s was 95% when the area of the laminated film was 100%.

[Comparative Example 1 (Test piece # 0)]
As a resin sheet, a ring-shaped sheet surrounded by a circumference having a radius of 50 mm and a circumference having a radius of 35 mm, which are concentric circles, was prepared. This ring-shaped sheet was thermocompression bonded to the surface of the disk 10. The ring-shaped sheet was placed at a predetermined position on the disk 10 such that the adhesive layer side was in contact with the surface of the disk 10. At this time, the ring-shaped sheet was placed so that the outer arc of the ring-shaped sheet was along the outer periphery of the disk 10. The ring-shaped sheet piece was placed on the surface of the disk 10 and heated to 280 ° C. while being pressed against the disk 10, thereby attaching the ring-shaped sheet to the surface of the disk 10.

  Even if the ring-shaped sheet used in this example was cut out from the laminated film in a wasteful arrangement, the area of the cut-out ring-shaped sheet was 40% when the area of the laminated film was 100%. It was.

[Evaluation]
A sliding test was performed on the test pieces # 1 to # 6 and # 0. The sliding test will be described with reference to FIG. Any one of the above test pieces was fixed to the turntable with the formed sliding layer facing upward. On the sliding layer, two shoes (made of aluminum alloy, surface roughness 0.6 μm Rz) were placed as mating members in a state of being fixed at predetermined positions. The surface of the sliding layer and the surface of the shoe were brought into sliding contact with each other by rotating the turntable. The rotation direction was the arrow direction in FIGS. 4 and 5, and the sliding speed was 0.8 m / sec. At this time, a load of 0.5 MPa was applied from above each shoe in a direction perpendicular to the test piece. Further, during the test, lubricating oil was dropped onto the sliding layer at a rate of 0.5 g / min.

  The sliding test was performed using the test pieces # 1 to # 6 and # 0, and the coefficient of friction 20 to 60 seconds after the start of stabilization of the coefficient of friction was measured. Table 1 shows the friction coefficient of each test piece.

  The # 0 test piece having a sliding layer made of one ring-shaped sheet had a friction coefficient of 0.031. On the other hand, the test pieces of # 1 to # 6 had a sliding layer formed by arranging a plurality of resin sheet pieces in the circumferential direction, and exhibited a friction coefficient equal to or less than that of the test piece of # 0. Therefore, even if the sliding layer is formed of a plurality of resin sheet pieces, the slidability does not deteriorate, and the slidability is further improved by forming an oil retaining groove or adjusting the groove width. .

  As can be seen from the test results of # 1 to # 3 and # 6 test pieces having 36 oil retaining grooves extending in the radial direction at a pitch of ω = 10 °, the friction coefficient is reduced by adjusting the groove width. did. In addition, test piece # 5 in which the oil retaining groove was inclined with respect to the radial direction exhibited particularly excellent slidability.

It is explanatory drawing of the rotation sliding member of this invention, Comprising: It is a front view which shows typically the swash plate of a swash plate type compressor. It is a front view of the swash plate of a swash plate type compressor, Comprising: A part of sliding layer is shown. It is sectional drawing which shows the X-X 'cross section of FIG. It is a front view of the test piece produced in an Example, Comprising: It is a front view in which the resin sheet piece was arrange | positioned in part. It is a top view which shows arrangement | positioning at the time of cutting out the resin sheet used for the Example from a laminated | multilayer film. It is a front view of the test piece produced in an Example, Comprising: It is a front view in which the resin sheet piece was arrange | positioned in part. It is explanatory drawing of the sliding test for measuring a friction coefficient. It is a front view which shows typically the swash plate of the conventional swash plate type compressor. It is a figure which shows typically the cross section of a swash plate type compressor.

Explanation of symbols

1, 10: Base material 2, 2 ′, 4, 6: Sliding layer 2s, 2s ′, 4s, 6s: Resin sheet pieces 25, 45, 65: Oil holding grooves 8, 8 ′, 98: Swash plate 8p, 8p ', 98p: sliding contact surface

Claims (12)

A base material having a rotation surface that rotates around the center line and is inclined with respect to the center line, and a ring-shaped sliding layer that is formed on at least a part of the rotation surface and is positioned around the center line A rotary sliding member comprising:
The sliding layer is composed of a plurality of resin sheets arranged in the circumferential direction and thermocompression bonded to the rotating surface.   The rotary sliding member according to claim 1, wherein the sliding layer has a groove portion formed by a gap provided between the resin sheets adjacent in the circumferential direction.   The plurality of resin sheets include an inner arc located on the inner circumference side of the sliding layer, an outer arc located on the outer circumference side of the sliding layer and having the same center as the inner arc, the inner arc and The rotary sliding member according to claim 1 or 2, which is a resin sheet piece having a shape defined by two non-intersecting line segments connecting the outer arc at both ends.   The rotary sliding member according to claim 3, wherein the line segment of the resin sheet piece coincides with a radial direction of the inner arc and the outer arc.   The rotary sliding member according to claim 3, wherein the line segment of the resin sheet piece is inclined with respect to a radial direction of the inner arc and the outer arc.   The line segment of the resin sheet piece is in the rotation direction of the base material at an angle of 90 ° or less (excluding 0 °) with respect to the radial direction of the inner arc and the outer arc with one end of the inner arc as a center. The rotary sliding member according to claim 5 which inclines.   The rotary sliding member according to claim 3, wherein a center angle of the inner arc and the outer arc of the resin sheet piece is 3 ° to 90 °.   The rotary sliding member according to claim 3, wherein each of the plurality of resin sheet pieces has the same shape.   The rotary sliding member according to claim 1, wherein the resin sheet includes a polyaryl ketone resin at least in a surface layer portion.   The rotational sliding according to claim 9, wherein the resin sheet is a laminated sheet comprising an adhesive layer containing a thermoplastic polyimide resin and a polyaryl ketone resin and a surface layer laminated on the adhesive layer and containing a polyaryl ketone resin. Element.   The rotary sliding member according to claim 9 or 10, wherein the polyaryl ketone resin is a polyether ether ketone resin.   The rotary sliding member according to claim 1, wherein the base material is a swash plate of a swash plate type compressor.

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