WO2022224673A1 - 摺動部品 - Google Patents
摺動部品 Download PDFInfo
- Publication number
- WO2022224673A1 WO2022224673A1 PCT/JP2022/013242 JP2022013242W WO2022224673A1 WO 2022224673 A1 WO2022224673 A1 WO 2022224673A1 JP 2022013242 W JP2022013242 W JP 2022013242W WO 2022224673 A1 WO2022224673 A1 WO 2022224673A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal ring
- sliding
- fluid supply
- opening
- supply groove
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims abstract description 175
- 230000002093 peripheral effect Effects 0.000 claims abstract description 54
- 230000010363 phase shift Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 21
- 239000000314 lubricant Substances 0.000 description 52
- 238000011144 upstream manufacturing Methods 0.000 description 13
- 238000012986 modification Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000000356 contaminant Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- -1 etc. Chemical compound 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
- F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
- F16J15/3412—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities
- F16J15/3416—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities with at least one continuous groove
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/045—Sliding-contact bearings for exclusively rotary movement for axial load only with grooves in the bearing surface to generate hydrodynamic pressure, e.g. spiral groove thrust bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/107—Grooves for generating pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
Definitions
- the present invention relates to a sliding part that rotates relative to each other, for example, a sliding part used in a shaft sealing device for sealing a rotating shaft of a rotating machine in the field of automobiles, general industrial machinery, or other sealing fields, or automobiles, general industrial machinery. , or other sliding parts used for bearings of rotating machines in the field of bearings.
- a lubricant is applied between the sliding surfaces of a pair of sliding parts that rotate relative to each other to reduce friction.
- a mechanical seal (see, for example, Patent Document 1) is known as a sliding component used in a shaft sealing device that seals the rotating shaft of a rotating machine such as a pump or turbine to prevent leakage of the fluid to be sealed.
- a mechanical seal has a stationary seal ring and a rotating seal ring as sliding parts.
- the mechanical seal is configured such that the sliding surfaces of the stationary seal ring and the rotating seal ring are in pressure contact with each other so as to be slidable, and the sliding surfaces can be sealed.
- it is particularly important to maintain lubricity for a long period of time in order to prevent wear due to sliding between sliding surfaces while maintaining sealing performance.
- the stationary seal ring and the rotary seal ring can use the liquid for lubrication by allowing the liquid to enter between the sliding surfaces.
- the stationary seal ring and the rotary seal ring if the sealed fluid or the fluid on the leakage side is gas, the relative rotation of the stationary seal ring and the rotary seal ring causes lubricant to be applied between the sliding surfaces. is pushed out from between the sliding surfaces over time, making it impossible to maintain good lubricity for a long period of time. Therefore, for stationary seal rings and rotary seal rings used in such an environment, attempts have been made to maintain the lubricity between the sliding surfaces by supplying liquid that is dripped little by little between the sliding surfaces. is widely practiced.
- the pair of sliding parts rotate relative to each other, the liquid that is supplied by dripping onto either the inner diameter side or the outer diameter side of the sliding surface will flow through the extremely small gap between the sliding surfaces.
- the relative rotation of the pair of sliding parts makes it easier for the liquid to be thrown off to the inner diameter side or the outer diameter side, which effectively contributes to the improvement of lubricity. Hateful. Therefore, there is a problem that the pair of sliding parts cannot maintain high lubricity over a long period of time.
- the present invention has been made in view of such problems, and aims to provide a sliding part that can efficiently utilize the liquid supplied between the sliding surfaces and maintain high lubricity over a long period of time. With the goal.
- the sliding component of the present invention is A pair of sliding parts arranged facing each other at locations that rotate relative to each other when the rotary machine is driven, At least one of the sliding surfaces of the pair of sliding parts is formed on the outer peripheral edge or the inner peripheral edge and extends in the circumferential direction, and extends from the opening and opens to the peripheral edge on the side of the opening. and a fluid supply groove.
- the openings extend in the circumferential direction and are open in the radial direction, making it easy to take in the liquid.
- the liquid taken in the openings is introduced into the fluid supply groove, and flows to the center in the radial direction of the sliding surface. Moving. As a result, the liquid is supplied between the sliding surfaces, and high lubricity between the sliding surfaces can be maintained for a long period of time.
- the opening and the fluid supply groove may have the same depth. According to this, the liquid can be easily guided from the opening to the fluid supply groove.
- annular opening recess is formed by the pair of sliding parts on the outer diameter side or the inner diameter side of the sliding surface, The opening may communicate with the annular opening recess. According to this, the annular opening concave portion can reliably collect the liquid. Therefore, the annular opening recess makes it easier for the liquid to be taken into the opening.
- the fluid supply groove may extend from a circumferential end of the opening. According to this, the fluid supply groove can efficiently introduce the liquid that has moved to the circumferential end of the opening.
- a plurality of the fluid supply grooves and the openings may be arranged in the circumferential direction. According to this, the liquid can be uniformly supplied in the circumferential direction.
- the plurality of fluid supply grooves and the plurality of openings may constitute a fluid circulation path that continues in a circumferential direction. According to this, since the liquid that has flowed through the fluid supply groove is taken into the downstream opening, the fluid circulation path can circulate the liquid and efficiently contribute to lubrication.
- a plurality of the fluid circulation paths may be formed with different phases. According to this, it is possible to improve the overall lubricity between the sliding surfaces. Further, the fluid can be efficiently stored on the side opposite to the opening from the portion where the fluid supply groove of one fluid circulation path and the fluid supply groove of the other fluid circulation path intersect.
- FIG. 1 is a cross-sectional view showing the structure of a rotating machine using a mechanical seal having sliding parts according to Example 1 of the present invention; It is the figure which looked at the stationary seal ring of the mechanical seal from the sliding surface side. It is a figure which expands and shows a part of sliding surface of a stationary seal ring.
- (a) is a cross-sectional view taken along line AA of FIG. 2 showing a state of sliding contact between a stationary seal ring and a rotary seal ring, and (b) shows a state of sliding contact between a stationary seal ring and a rotary seal ring;
- 3 is a cross-sectional view taken along the line BB of FIG. 2.
- FIG. 11 is a view of a stationary seal ring in Modification 3 as viewed from the sliding surface side;
- FIG. 11 is a view of a stationary seal ring in Modification 4 as viewed from the sliding surface side;
- FIG. 11 is a view of a stationary seal ring in Modification 5 as viewed from the sliding surface side;
- (a) is a CC sectional view of FIG. 9 showing the state of sliding contact between the stationary seal ring and the rotary seal ring in Modification 5
- (b) is a stationary seal ring and rotary seal in Modification 5;
- FIG. 11 is a view of a stationary seal ring in Modification 3 as viewed from the sliding surface side
- FIG. 11 is a view of a stationary seal ring in Modification 4 as viewed from the sliding surface side
- FIG. 11 is a view of a stationary seal ring in Modification 5 as viewed from the sliding surface side
- (a) is a CC sectional view of FIG. 9 showing the state of sliding contact between
- FIG. 10 is a cross-sectional view taken along line DD of FIG. 9, showing a state of sliding contact with the ring; It is the figure which looked at the stationary seal ring in Example 2 of this invention from the sliding surface side.
- FIG. 8 is an enlarged view showing a part of the sliding surface of the stationary seal ring in Example 2; It is the figure which looked at the stationary seal ring in Example 3 of this invention from the sliding surface side.
- 14 is a cross-sectional view taken along line EE of FIG. 13, showing a state of sliding contact between a stationary seal ring and a rotary seal ring in Example 3.
- FIG. 1 For convenience of explanation, in the drawings, grooves and the like formed on the sliding surface are indicated by dots.
- the sliding parts in this embodiment are, for example, a rotating seal ring 3 and a stationary seal ring that constitute a mechanical seal M, which is a shaft sealing device for sealing a rotating shaft of rotating machines in the field of seals, such as automobiles, general industrial machines, and other rotary machines. is 6.
- the rotary seal ring 3 is formed in an annular shape. Also, the rotary seal ring 3 is attached to the rotary shaft 1 via the sleeve 2 and is rotatable integrally with the rotary shaft 1 .
- the stationary seal ring 6 is formed in an annular shape. Also, the stationary seal ring 6 is attached to a seal cover 5 fixed to the housing 4 of the rotary machine in a non-rotating and axially movable state.
- the sliding surface S6 of the stationary seal ring 6 is opposed to the sliding surface S3 of the rotary seal ring 3.
- the stationary seal ring 6 is urged toward the rotary seal ring 3 by the urging force of the urging means 7 .
- the rotary seal ring 3 and the stationary seal ring 6 are adapted to closely slide between the sliding surfaces S3 and S6.
- the mechanical seal M of this embodiment is of a so-called outside type, and the sliding surfaces S3 and S6 of the rotary seal ring 3 and the stationary seal ring 6 form a seal on the inner peripheral side as the sealed fluid side. It prevents the sealing fluid from flowing out to the outer peripheral side as the leakage side.
- the sealed fluid is a gaseous high-pressure fluid such as dry gas
- the fluid on the outer peripheral side is the atmosphere, a gaseous low-pressure fluid such as dry gas.
- lubricant Lu as a liquid such as lubricating oil is stored on the outer peripheral sides of the rotary seal ring 3 and the stationary seal ring 6 .
- a small amount of the lubricant Lu is applied to the outer peripheral edges of the sliding surfaces S3 and S6 of the rotary seal ring 3 and the stationary seal ring 6 by utilizing the fact that the lubricant Lu is dripped after being rolled up as the rotary shaft 1 rotates. supplied one by one. Note that the dropping method of the lubricant Lu may be changed as appropriate.
- the rotary seal ring 3 and the stationary seal ring 6 are typically made of a combination of SiC (hard material) or SiC (hard material) and carbon (soft material). Those used as dynamic materials are applicable.
- SiC include sintered bodies using boron, aluminum, carbon, etc. as sintering aids, materials consisting of two or more phases with different components and compositions, for example, SiC in which graphite particles are dispersed, SiC and Si There are reaction-sintered SiC, SiC-TiC, SiC-TiN, etc., and as the carbon, resin-molded carbon, sintered carbon, etc., as well as carbon in which carbonaceous and graphite are mixed, can be used. Metal materials, resin materials, surface modification materials (coating materials), composite materials, and the like can also be applied in addition to the sliding materials described above.
- the stationary seal ring 6 has tapered surfaces on the outer diameter side in this order from the outer diameter side to the inner diameter side at the axial end portions in the direction of the sliding surface S3 of the rotary seal ring 3 .
- 63, an outer peripheral surface 62 (see FIG. 4), a sliding surface S6, and an inner diameter tapered surface are formed.
- an annular fluid circulation path 10 is formed on the sliding surface S6.
- the fluid circulation path 10 can be formed by subjecting the sliding surface S6 to fine processing such as laser processing, etching, and sandblasting.
- the fluid circulation path 10 is composed of four equally-spaced openings 11 and four equally-spaced fluid supply grooves 12 .
- the opening 11 is formed in the outer peripheral edge 60 of the sliding surface S6.
- the opening 11 is defined by a wall 11a on the inner diameter side of the outer peripheral edge 60a and a bottom surface 11e.
- the wall 11a extends upward from the bottom surface 11e and is orthogonal to the land 14.
- the bottom surface 11e extends parallel to the lands 13,14.
- the opening 11 has a stepped cross section (see FIG. 4(a)) and opens in the direction of the sliding surface S3 of the opposing rotary seal ring 3 and in the outer peripheral direction.
- the fluid supply groove 12 extends linearly and communicates with the adjacent openings 11,11.
- the fluid supply groove 12 is defined by an inner diameter side wall 12a, a bottom surface 12e, and an outer diameter side wall 12b. Walls 12a, 12b extend upward from bottom surface 12e and are perpendicular to lands 13,14. The bottom surface 12e extends parallel to the lands 13,14.
- the fluid supply groove 12 has a concave cross section (see FIG. 4(b)), opens toward the sliding surface S3 of the opposing rotary seal ring 3, and communicates with the adjacent openings 11, 11 (see FIG. 4(b)). 2).
- the wall 12a on the inner diameter side of the fluid supply groove 12 is connected to the wall 11a on the inner diameter side of the opening 11 forming an obtuse angle.
- the bottom surface 12e of the fluid supply groove 12 and the bottom surface 11e of the opening 11 form substantially the same plane. That is, as shown in FIG. 4, the opening 11 and the fluid supply groove 12 have substantially the same depth D. As shown in FIG.
- the wall 12b on the outer diameter side of the fluid supply groove 12 forms an acute angle with the outer peripheral edge 60a.
- the sliding surface S6 has lands 13 and 14, the upper end surfaces of which are located on the same plane.
- the land 13 is defined by the outer peripheral edge 60a and the fluid supply groove 12, and four lands are provided in this embodiment.
- the land 14 is bounded by the fluid circulation path 10 and the inner peripheral edge 61a, and is annularly connected without interruption.
- the rotary seal ring 3 and the stationary seal ring 6 form an annular opening recess 15 on the outer diameter side of the sliding surface S6. ing.
- the annular opening concave portion 15 has a rectangular cross-sectional shape that continues in the circumferential direction and opens in the outer circumferential direction.
- the annular opening concave portion 15 will be described in detail.
- the annular opening recess 15 is defined by the tapered surface 30 of the rotary seal ring 3, the sliding surface S3 of the rotary seal ring 3, the outer peripheral surface 62 of the stationary seal ring 6, and the outer diameter side tapered surface 63 of the stationary seal ring 6. defined.
- the tapered surface 30 of the rotary seal ring 3 extends obliquely away from the stationary seal ring 6 toward the outer diameter side from the outer peripheral edge of the sliding surface S3 and extends in the circumferential direction.
- the outer peripheral surface 62 of the stationary seal ring 6 is orthogonal to the outer peripheral edge 60a of the sliding surface S6, extends away from the rotary seal ring 3, and extends in the circumferential direction.
- the outer diameter side tapered surface 63 of the stationary seal ring 6 extends obliquely away from the rotary seal ring 3 toward the outer diameter side from the outer peripheral surface 62 and extends in the circumferential direction.
- the outer peripheral edge of the sliding surface S3 is located on the outer diameter side of the outer peripheral edge 60a of the sliding surface S6.
- the lubricant Lu dripped into the annular opening recess 15 is removed by the tapered surface 30 of the rotary seal ring 3 , the sliding surface S 3 and the outer diameter side tapered surface 63 of the stationary seal ring 6 . , i.e., the outer peripheral surface 62 of the stationary seal ring 6 and the outer peripheral edge 60a.
- the lubricant Lu is a small liquid mass, it becomes a large liquid mass by moving in the circumferential direction inside the annular opening recess 15 and merging with other lubricant Lu.
- the upstream end 12c of the fluid supply groove 12 communicates with the circumferential downstream end 11c on the downstream side in the rotation direction, and the wall 12b on the outer diameter side of the fluid supply groove 12 faces.
- the outer diameter side wall 12b is formed to be radially inclined with a component extending in the direction of rotation of the rotary seal ring 3 and a component extending in the radial direction.
- the fluid supply groove 12 can efficiently introduce the lubricant Lu that has moved to the downstream end 11c of the opening 11 in the circumferential direction, as indicated by the solid line arrows in FIG.
- the opening 11 and the fluid supply groove 12 have substantially the same depth D, the lubricant Lu can be easily guided from the opening 11 to the fluid supply groove 12 .
- the depth D of the opening 11 and the fluid supply groove 12 is sufficiently deep. Even if the lubricant Lu and the fluid to be sealed follow the rotation of the rotary seal ring 3, little or no dynamic pressure is generated to urge the sliding surfaces S3 and S6 in the separation direction.
- a downstream end 12d of the fluid supply groove 12 in the moving direction of the lubricant Lu communicates with a circumferential upstream end 11d of the opening 11 on the downstream side.
- the fluid supply groove 12 allows the introduced lubricant Lu to follow along the walls 12a and 12b, so that it can be preferably introduced into the opening 11 on the downstream side.
- the lubricant Lu that has flowed into the fluid supply groove 12 follows the relative rotation between the rotary seal ring 3 and the stationary seal ring 6, and is partially supplied between the sliding surfaces S3 and S6. Specifically, it is supplied between the land 13 and the sliding surface S3 of the rotary seal ring 3, and between the annular land 14 and the sliding surface S3 of the rotary seal ring 3, respectively.
- middle means between, not half positions.
- the lubricant Lu taken into the downstream opening 11 from the fluid supply groove 12 follows the downstream opening 11 in the circumferential direction, and flows into the downstream fluid supply groove 12 in the same manner as described above. to be introduced.
- the lubricant Lu flows through the opening 11, the fluid supply groove 12, the opening 11, the fluid supply groove 12, .
- the fluid circulation path 10 can make the lubricant Lu efficiently contribute to lubrication.
- the fluid supply groove 12 communicates with the outer diameter side of the sliding surfaces S3 and S6 via the opening 11 on the downstream side. Therefore, especially contaminants having a higher specific gravity than the lubricant Lu are easily discharged to the outer diameter side of the sliding surfaces S3 and S6 when the rotary seal ring 3 and the stationary seal ring 6 rotate relative to each other. On the other hand, the lubricant Lu flows more easily along the opening 11 on the downstream side than the contaminants.
- the fluid circulation path 10 of the present embodiment has an axisymmetrical shape, the lubricant Lu can be supplied even if the rotating direction of the mating sliding part is the clockwise direction, which is the opposite direction of the present description. can be done.
- upstream and downstream are referred to for convenience of explanation based on the rotation direction of the rotary seal ring 3. Needless to say, the position changes depending on the rotation direction of the mating sliding part.
- the lubricant Lu is supplied between the sliding surfaces S3 and S6, and high lubricity between the sliding surfaces S3 and S6 can be maintained for a long period of time. .
- annular opening recess 15 can reliably collect the dripped lubricant Lu, the lubricant Lu is easily taken into the opening 11 from the annular opening recess 15 .
- the lubricant Lu can be uniformly supplied in the circumferential direction of the sliding surfaces S3 and S6.
- the fluid supply groove 12 has been described as extending linearly.
- the configuration is not limited to this.
- it may meander like the fluid supply groove 122 shown in FIG. 6 as a second modification. That is, the shape of the fluid supply groove may be changed as appropriate. Similarly, the shape of the opening may be changed as appropriate.
- the fluid supply groove 12 has been described as communicating with the circumferential ends 11c and 11d of the opening 11.
- the fluid supply groove 12 shown in FIG. Like the groove 123 , it may communicate with the longitudinal center of the opening 11 rather than the circumferential ends 11 c and 11 d of the opening 11 .
- the fluid supply groove 12 communicates with the adjacent openings 11, 11 to form the annular fluid circulation path 10, but this is not the only option.
- the upstream end 124c of the fluid supply groove 124 communicates only with the opening 111 on the upstream side in the rotational direction, and the downstream end of the fluid supply groove 124 124d may be open to the outer peripheral edge 60a. That is, the fluid circulation path may not be formed.
- annular opening recess 15 has been described as having a rectangular cross-sectional shape that is continuous in the circumferential direction.
- the cross-sectional shape of the recess may be discontinuous in the circumferential direction.
- the annular opening recess 151 overlaps the opening 11 in the radial direction as shown in FIG. 10A and communicates with the opening 11, and as shown in FIG. There are portions that do not overlap in the radial direction and do not communicate with the opening 11 .
- the annular opening recess 151 is defined by the tapered surface 30 of the rotary seal ring 3, the sliding surface S3 of the rotary seal ring 3, and the outer diameter side tapered surface 64 of the stationary seal ring 6. It is formed in a triangular shape when viewed in cross section.
- the flat end surface of the rotary seal ring 3 facing the stationary seal ring 6 is referred to as a sliding surface S3, and strictly speaking, it has a portion that does not come into sliding contact with the stationary seal ring 6. As shown in FIG.
- the radially outer tapered surface 64 of the stationary seal ring 6 extends from the outer peripheral edge 60a of the sliding surface S6 toward the radially outer side while being inclined away from the rotary seal ring 3 .
- the lubricant Lu dripped into the annular opening recess 151 is guided by the outer diameter side tapered surface 64 to the bottom side of the annular opening recess 151 , that is, to the outer peripheral edge 60 a side of the stationary seal ring 6 .
- annular opening recess 151 is axially shortened toward the inner diameter side by the outer diameter side tapered surface 64, the lubricant Lu in the annular opening recess 151 is less likely to be discharged to the outer diameter side space. . This becomes more pronounced as the surface tension of the lubricant Lu increases.
- an outer tapered surface 64 of the stationary seal ring 6 is formed with four recesses 65 that are recessed in the axial direction. ing.
- the recess 65 has a bottom surface that is substantially flush with the bottom surface 11e of the opening 11 and has a rectangular cross-sectional shape. This makes it easier for the opening 11 to take in the lubricant Lu through the recess 65 .
- FIG. 11 and 12 a sliding component according to Embodiment 2 will be described with reference to FIGS. 11 and 12.
- FIG. The same reference numerals are assigned to the same components as those shown in the first embodiment, and duplicate descriptions are omitted.
- two fluid circulation paths 110 are formed on the sliding surface S106 of the stationary seal ring 106 with a circumferential shift of approximately 45 degrees.
- the structure of the fluid circulation path 110 alone is the same as that of the fluid circulation path 10 of the first embodiment, but for convenience of explanation, the fluid circulation path is shown at the same angle as that of the first embodiment in FIGS. 110 is referred to as a fluid circulation path 110A, and the fluid circulation path 110 that is displaced from the fluid circulation path 110A in the circumferential direction is referred to as a fluid circulation path 110B.
- openings 11 and the fluid supply grooves 12 constituting the fluid circulation path 110A are arranged in order from the 12 o'clock position of the stationary seal ring 106 in FIG. They may also be referred to as opening 11A1, fluid supply groove 12A2, opening 11A3, fluid supply groove 12A4, opening 11A5, fluid supply groove 12A6, opening 11A7, and fluid supply groove 12A8.
- the sliding surface S106 has lands 113, 114 and 115, the upper end surfaces of which are located on the same plane.
- the land 113 is defined by the outer peripheral edge 60 a , the fluid supply groove 12 , and the fluid supply groove 12 intersecting the fluid supply groove 12 .
- the land 114 is defined by the fluid supply groove 12, the fluid supply groove 12 crossing the fluid supply groove 12, and the inner peripheral edge 61a.
- the land 115 is defined by the opening 11 , two fluid supply grooves 12 communicating with the opening 11 , and the fluid supply grooves 12 crossing the two fluid supply grooves 12 .
- the fluid circulation paths 110A and 110B will be described in detail. In this description, the rotation direction of the rotary seal ring 3 from the 12 o'clock position of the stationary seal ring 106 in FIG.
- the downstream side of the fluid supply groove 12B1 of the fluid circulation path 110B crosses the upstream side of the fluid supply groove 12A2 of the fluid circulation path 110A.
- the downstream side of the fluid supply groove 12A2 of the fluid circulation path 110A crosses the upstream side of the fluid supply groove 12B3 of the fluid circulation path 110B.
- the fluid supply groove 12B3 is arranged adjacent to and downstream of the fluid supply groove 12B1.
- the downstream side of the fluid supply groove 12B3 of the fluid circulation path 110B crosses the upstream side of the fluid supply groove 12A4 of the fluid circulation path 110A.
- the downstream side of the fluid supply groove 12A4 of the fluid circulation path 110A crosses the upstream side of the fluid supply groove 12B5 of the fluid circulation path 110B.
- the downstream side of the fluid supply groove 12B5 of the fluid circulation path 110B crosses the upstream side of the fluid supply groove 12A6 of the fluid circulation path 110A.
- the downstream side of the fluid supply groove 12A6 of the fluid circulation path 110A crosses the upstream side of the fluid supply groove 12B7 of the fluid circulation path 110B.
- the downstream side of the fluid supply groove 12B7 of the fluid circulation path 110B crosses the upstream side of the fluid supply groove 12A8 of the fluid circulation path 110A.
- the downstream side of the fluid supply groove 12A8 of the fluid circulation path 110A crosses the upstream side of the fluid supply groove 12B1 of the fluid circulation path 110B.
- the openings 11A1 and 11B2 and the fluid supply grooves 12A2 and 12B1 are exemplified to describe the flow of the lubricant Lu with reference to FIG.
- the lubricant Lu tries to follow the rotation direction of the rotary seal ring 3, that is, the circumferential direction.
- the lubricant Lu introduced into the fluid supply groove 12A2 from the opening 11A1 joins the lubricant Lu moving in the fluid supply groove 12B1 at the intersection of the fluid supply grooves 12A2 and 12B1, and flows between the fluid supply groove 12A2 and the opening. Flow to 11B2.
- This confluence facilitates introduction of the lubricant Lu flowing through the fluid supply groove 12B1 into the fluid supply groove 12A2. In this way, the lubricant Lu once guided to the inner diameter side of the crossing portion is less likely to be discharged to the outside, and the overall lubricity between the sliding surfaces S3 and S106 can be improved.
- the centers of the fluid supply grooves 12A2 and 12B1 in the longitudinal direction are located on the inner diameter side of the intersecting portion of the fluid supply grooves 12A2 and 12B1, that is, on the side opposite to the opening 11.
- the fluid circulation paths 110A and 110B can efficiently store the lubricant Lu on the side opposite to the opening 11.
- the lubricant Lu is distributed in the circumferential direction. It can be uniformly supplied between the sliding surfaces S3 and S106.
- each fluid supply groove 12 communicates with the outer diameter side of the sliding surfaces S3 and S106 via the opening 11 on the downstream side.
- contaminants which have a higher specific gravity than the lubricant Lu, do not remain on the inner diameter side of the intersection of the fluid supply grooves 12 of the fluid circulation paths 110A and 110B. 3 and the stationary seal ring 106 rotate relative to each other, the oil is easily discharged to the outer diameter side of the sliding surfaces S3 and S106.
- FIG. 13 and 14 a sliding component according to Embodiment 3 will be described with reference to FIGS. 13 and 14.
- FIG. The same reference numerals are assigned to the same components as those shown in the first and second embodiments, and redundant explanations are omitted.
- Example 3 the lubricant Lu is dripped onto the inner peripheral edges of the sliding surfaces S203 and S206 of the rotary seal ring 203 and stationary seal ring 206 .
- the stationary seal ring 206 has tapered surfaces on the outer diameter side, which are arranged in order from the outer diameter side to the inner diameter side at the axial ends of the stationary seal ring 206 in the direction of the sliding surface S203 of the rotary seal ring 203 . , a sliding surface S206, an inner peripheral surface 262 (see FIG. 14), and an inner diameter tapered surface 263 are formed.
- a fluid circulation path 210 is formed on the sliding surface S206 of the stationary seal ring 206 .
- the fluid circulation path 210 is composed of four equally-spaced openings 211 and four equally-spaced fluid supply grooves 212 .
- the opening 211 is formed in the inner peripheral edge 61 of the sliding surface S206. Also, the opening 211 extends linearly.
- the fluid supply groove 212 extends in a bent C shape and communicates with the adjacent openings 211 , 211 .
- the rotary seal ring 203 and the stationary seal ring 206 form an annular opening concave portion 215 on the inner peripheral side of the sliding surface S206. ing.
- the annular opening recess 215 has a rectangular cross-sectional shape that continues in the circumferential direction and opens in the inner circumferential direction.
- the annular opening concave portion 215 will be described in detail.
- the annular opening recess 215 is formed by the tapered surface 230 of the rotary seal ring 203, the sliding surface S203 of the rotary seal ring 203, the inner peripheral surface 262 of the stationary seal ring 206, and the inner diameter side tapered surface 263 of the stationary seal ring 206. defined.
- the tapered surface 230 of the rotary seal ring 203 extends obliquely away from the stationary seal ring 206 toward the inner diameter side from the inner peripheral edge of the sliding surface S203 and extends in the circumferential direction.
- the inner peripheral surface 262 of the stationary seal ring 206 is orthogonal to the inner peripheral edge 61a of the sliding surface S206, extends away from the rotary seal ring 203, and extends in the circumferential direction.
- An inner diameter side tapered surface 263 of the stationary seal ring 206 extends in a direction away from the rotary seal ring 203 toward the inner diameter side from the inner peripheral surface 262 and extends in the circumferential direction.
- the inner peripheral edge of the sliding surface S203 is substantially at the same radial position as the inner peripheral edge 61a of the sliding surface S206.
- the lubricant Lu dripped into the annular opening recess 215 is moved to the bottom side of the annular opening recess 215 by the tapered surface 230 of the rotary seal ring 203, the sliding surface S203, and the inner diameter side tapered surface 263 of the stationary seal ring 206. It is guided toward the inner peripheral surface 262 of the stationary seal ring 206 and the inner peripheral edge 61a.
- the lubricant Lu is supplied between the sliding surfaces S203 and S206, so that high lubricity between the sliding surfaces S203 and S206 can be maintained for a long period of time.
- the mechanical seal is of the outside type. It may be a so-called inside type that prevents
- the opening and the fluid supply groove are formed in the stationary seal ring. It may be formed on each stationary seal ring.
- the openings and the fluid supply grooves are arranged at 4 or 8 equal intervals, but this is not limitative and the number of openings and fluid supply grooves is not limited. Moreover, although it is preferable that they are equally arranged in the circumferential direction, it does not matter.
- annular opening recess is provided, but the present invention is not limited to this, and the annular opening recess may not be provided.
- annular opening recesses are formed continuously in the circumferential direction
- the present invention is not limited to this, and a plurality of opening recesses may be formed. That is, it may be discontinuous in the circumferential direction.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Sealing (AREA)
Abstract
Description
回転機械の駆動時に相対回転する箇所に対向して配置される一対の摺動部品であって、
前記一対の摺動部品の少なくとも一方の摺動面は、その外周縁部または内周縁部に形成され、周方向に延びる開口部と、前記開口部から延び、当該開口部側の周縁に開口する流体供給溝と、を有している。
これによれば、開口部は周方向に延び径方向に開口していて液体を取り込みやすくなっており、さらに開口部に取り込まれた液体は流体供給溝に導入され摺動面の径方向中央に移動する。これにより、摺動面間に液体が供給され摺動面同士の高い潤滑性を長期に亘って維持することができる。
これによれば、開口部から流体供給溝に液体を導きやすい。
前記開口部は、前記環状開口凹部に連通していてもよい。
これによれば、環状開口凹部は液体を確実に捕集することができる。そのため、環状開口凹部により開口部に液体が取り込まれやすくなっている。
これによれば、流体供給溝は、開口部における周方向端部に移動してきた液体を効率よく導入することができる。
これによれば、周方向に均一に液体を供給することができる。
これによれば、流体供給溝を流れた液体が下流の開口部に取り込まれるため、流体循環路は液体を循環させて効率的に潤滑に寄与できる。
これによれば、摺動面間における全体的な潤滑性を高めることができる。また、一の流体循環路の流体供給溝と、他の流体循環路の流体供給溝とが交差している部分よりも開口部とは反対側に流体を効率的に貯留できる。
6 静止密封環(摺動部品)
10 流体循環路
11 開口部
11c 周方向端部
11d 周方向端部
12 流体供給溝
15 環状開口凹部
60 外周縁部
60a 外周縁(開口部側の周縁)
61 内周縁部
111 開口部
121~124 流体供給溝
106 静止密封環(摺動部品)
110A,110B 流体循環路
203 回転密封環(摺動部品)
206 静止密封環(摺動部品)
210 流体循環路
211 開口部
212 流体供給溝
215 環状開口凹部
61a 内周縁(開口部側の周縁)
D 深さ
Lu 潤滑剤(流体)
M メカニカルシール
S3 摺動面
S6 摺動面
S106 摺動面
S203 摺動面
S206 摺動面
Claims (7)
- 回転機械の駆動時に相対回転する箇所に対向して配置される一対の摺動部品であって、
前記一対の摺動部品の少なくとも一方の摺動面は、その外周縁部または内周縁部に形成され、周方向に延びる開口部と、前記開口部から延び、当該開口部側の周縁に開口する流体供給溝と、を有している摺動部品。 - 前記開口部および前記流体供給溝は、それぞれの深さが同じである請求項1に記載の摺動部品。
- 前記摺動面よりも外径側または内径側には、前記一対の摺動部品によって環状の環状開口凹部が形成されており、
前記開口部は、前記環状開口凹部に連通している請求項1または2に記載の摺動部品。 - 前記流体供給溝は、前記開口部における周方向端部から延びている請求項1ないし3のいずれかに記載の摺動部品。
- 前記流体供給溝および前記開口部は周方向に複数配置されている請求項1ないし4のいずれかに記載の摺動部品。
- 複数の前記流体供給溝および複数の前記開口部は周方向に環状に連続する流体循環路を構成している請求項5に記載の摺動部品。
- 前記流体循環路は、位相をずらして複数形成されている請求項6に記載の摺動部品。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP22791451.2A EP4328460A1 (en) | 2021-04-23 | 2022-03-22 | Sliding component |
KR1020237037192A KR20230162974A (ko) | 2021-04-23 | 2022-03-22 | 슬라이딩 부품 |
CN202280029483.0A CN117222832A (zh) | 2021-04-23 | 2022-03-22 | 一种滑动部件 |
JP2023516357A JP7528368B2 (ja) | 2021-04-23 | 2022-03-22 | 摺動部品 |
Applications Claiming Priority (2)
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JP2021073078 | 2021-04-23 | ||
JP2021-073078 | 2021-04-23 |
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WO2022224673A1 true WO2022224673A1 (ja) | 2022-10-27 |
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EP (1) | EP4328460A1 (ja) |
JP (1) | JP7528368B2 (ja) |
KR (1) | KR20230162974A (ja) |
CN (1) | CN117222832A (ja) |
WO (1) | WO2022224673A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2016035860A1 (ja) * | 2014-09-04 | 2016-03-10 | イーグル工業株式会社 | メカニカルシール |
WO2017002646A1 (ja) * | 2015-06-27 | 2017-01-05 | イーグル工業株式会社 | 摺動部品 |
JP2017053423A (ja) | 2015-09-09 | 2017-03-16 | 日本ピラー工業株式会社 | メカニカルシール |
JP2020173020A (ja) * | 2019-04-09 | 2020-10-22 | イーグル工業株式会社 | 摺動部品 |
WO2021020074A1 (ja) * | 2019-07-26 | 2021-02-04 | イーグル工業株式会社 | 摺動部品 |
Family Cites Families (1)
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JP2019027466A (ja) | 2017-07-27 | 2019-02-21 | 日本ピラー工業株式会社 | メカニカルシール |
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2022
- 2022-03-22 EP EP22791451.2A patent/EP4328460A1/en active Pending
- 2022-03-22 WO PCT/JP2022/013242 patent/WO2022224673A1/ja active Application Filing
- 2022-03-22 KR KR1020237037192A patent/KR20230162974A/ko unknown
- 2022-03-22 JP JP2023516357A patent/JP7528368B2/ja active Active
- 2022-03-22 CN CN202280029483.0A patent/CN117222832A/zh active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2016035860A1 (ja) * | 2014-09-04 | 2016-03-10 | イーグル工業株式会社 | メカニカルシール |
WO2017002646A1 (ja) * | 2015-06-27 | 2017-01-05 | イーグル工業株式会社 | 摺動部品 |
JP2017053423A (ja) | 2015-09-09 | 2017-03-16 | 日本ピラー工業株式会社 | メカニカルシール |
JP2020173020A (ja) * | 2019-04-09 | 2020-10-22 | イーグル工業株式会社 | 摺動部品 |
WO2021020074A1 (ja) * | 2019-07-26 | 2021-02-04 | イーグル工業株式会社 | 摺動部品 |
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KR20230162974A (ko) | 2023-11-29 |
CN117222832A (zh) | 2023-12-12 |
EP4328460A1 (en) | 2024-02-28 |
JP7528368B2 (ja) | 2024-08-05 |
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