WO2013035502A1 - 摺動部品 - Google Patents
摺動部品 Download PDFInfo
- Publication number
- WO2013035502A1 WO2013035502A1 PCT/JP2012/070645 JP2012070645W WO2013035502A1 WO 2013035502 A1 WO2013035502 A1 WO 2013035502A1 JP 2012070645 W JP2012070645 W JP 2012070645W WO 2013035502 A1 WO2013035502 A1 WO 2013035502A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sliding
- pumping
- sliding surface
- dynamic pressure
- rotating ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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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
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
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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
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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
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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
- F16J15/342—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 means for feeding fluid directly to the face
Definitions
- the present invention relates to a sliding component that relatively rotates, for example, a sliding component that is used for mechanical seals in automobiles, general industrial machines, or other sealing fields.
- a sealing device for preventing leakage of fluid to be sealed long-term sealing performance can be achieved in a two-part structure, for example, a mechanical seal, which is configured to rotate relative to each other and slide on end surfaces on a plane.
- the conflicting conditions of “sealing” and “lubrication” must be compatible.
- a so-called fluid lubrication state can be achieved in which a dynamic pressure is generated between the sliding surfaces by rotation and sliding is performed with a liquid film interposed.
- a dynamic pressure is generated between the sliding surfaces by rotation and sliding is performed with a liquid film interposed.
- the fluid flows out of the sliding surface from the positive pressure portion. This fluid outflow corresponds to a leak in the case of a seal.
- a mechanical seal shown in FIG. 10 is known as a dynamic seal that generates dynamic pressure between sliding surfaces by rotation (hereinafter referred to as “prior art 1”; for example, see Patent Document 1).
- a plurality of radial grooves 32R and 32L that generate dynamic pressure during rotation are provided in the circumferential direction on the sliding surface 31 of the mating ring 30 that is one of the sliding parts.
- a pair of radial grooves 32R, 32L have tapered surfaces 33R, 33L that are opposite to each other along the circumferential direction so that the boundary is a trough, and both radial grooves 32R, 32L are formed at the boundary.
- a separating dam portion 34 is provided.
- a grating portion 50 in which a plurality of linear concavo-convex portions parallel to each other are formed in a predetermined section at a predetermined pitch is within a range of radii R2 to R3 of the sliding surface 51 having an inner diameter R1 and an outer diameter R4, and
- the plurality of grating parts are formed separately in the circumferential direction, and the linear concavo-convex parts of the plurality of grating parts are inclined at a predetermined angle with respect to the sliding direction of the sliding surface.
- the present invention has been made to solve the problems of the prior art, and does not leak when stationary, operates with fluid lubrication during rotation including the initial stage of rotation, prevents leakage, and achieves both sealing and lubrication.
- An object of the present invention is to provide a sliding component that can be used.
- the sliding component of the present invention includes, firstly, an annular stationary ring fixed to the fixed side and an annular rotating ring that rotates together with the rotating shaft so that each sliding surface faces each other.
- the sliding surface of either the stationary ring or the rotating ring has a circumferential direction so that a pumping portion that causes a pumping action by relative rotation sliding between the stationary ring and the rotating ring communicates with the sealed fluid storage space.
- the plurality of pumping units include a suction pumping unit that operates in a direction of sucking a sealed fluid and a discharge pumping unit that operates in a direction of discharging the sealed fluid,
- the other sliding surface of the stationary ring or the rotating ring has a circumferential direction so that a dynamic pressure generating groove that generates dynamic pressure by relative rotation sliding between the stationary ring and the rotating ring communicates with the sealed fluid storage space. It is characterized by being formed in plural.
- the sliding component of the present invention is characterized in that, in the first feature, the pumping part is formed in the stationary ring, and the dynamic pressure generating groove is formed in the rotating ring.
- the pumping part has a periodic structure of linear irregularities, and the linear irregularities
- the concave / convex direction is formed so as to be inclined at a predetermined angle with respect to the sliding direction of the sliding surface.
- the sliding component of the present invention is characterized in that, in the fourth and third aspects, the periodic structure of the linear irregularities of the pumping part is such that the direction of the linear irregularities of the adjacent pumping parts is in the sliding direction. It is characterized by being formed so as to be symmetric with respect to the sliding direction of the surface.
- the sliding component of the present invention is characterized in that, in the fifth or third feature, the periodic structure of linear irregularities of the pumping part is formed by irradiation with a femtosecond laser. .
- the sliding component according to any one of the first to fifth features, wherein the pumping portion is provided at the bottom of a plurality of recesses formed on the sliding surface. Yes.
- the liquid film thickness formed between the sliding surfaces of the stationary ring and the rotating ring is h.
- the suction pumping part and the discharge pumping part have a linear unevenness in a circumferential direction or / and / or in a side view. It is characterized in that each is formed with an arbitrary inclination in the radial direction.
- the suction pumping portion is configured such that the linear unevenness gradually increases in the rotational direction of the counterpart sliding member in a side view.
- the discharge pumping portion is formed such that the linear irregularities are gradually lowered in the rotation direction of the counterpart sliding member in a side view.
- the suction pumping portion is formed such that the linear unevenness gradually decreases in the inner circumferential direction in a side view.
- the discharge pumping portion is characterized in that linear irregularities are gradually lowered in the outer peripheral direction in a side view.
- the dynamic pressure generating groove includes a plurality of sets of dynamic pressures including a pair of adjacent radial grooves.
- the radial grooves constituting the generating groove set are tapered in opposite directions along the circumferential direction so that the boundary portions are valleys, and a dam portion that separates both radial grooves is provided at the boundary portions.
- the dynamic pressure generating groove extends in a substantially radial direction from the outer peripheral end of the sliding surface toward the inner peripheral side. It is characterized in that it has a substantially L-shaped groove that is bent on the circumferential side and extends in the substantially circumferential direction.
- the present invention has the following excellent effects. (1) Due to the first and second features described above, there is no leakage when stationary, and since a sealed fluid is taken into the pumping unit and a lubricating film is generated on the sliding surface at a low speed at which rotation starts. Sufficient lubrication is possible, sliding resistance is low, and stable sliding characteristics can be obtained. In addition, during rotation, dynamic pressure is generated on the sliding surface by the dynamic pressure generating groove, and a lubricating film is formed by the sealed fluid between the sliding surfaces of the rotating ring and the stationary ring, improving the sliding characteristics. Is done.
- the pumping part is formed on one of the sliding surfaces of the stationary ring or the rotating ring
- the dynamic pressure generating groove is formed on the other sliding surface of the stationary ring or the rotating ring.
- the pumping part can be formed from a periodic structure of linear irregularities, so that the pumping can be easily formed, and the pumping performance can be freely adjusted by adjusting the inclination angle. Can do.
- the fourth feature is suitable when the sliding surface rotates in both directions.
- the linear uneven structure of the pumping portion is formed by irradiation with the femtosecond laser, the directivity can be controlled and the processing position can also be controlled. Therefore, a desired periodic structure can be formed for each of the sections divided into discrete small sections.
- the pumping portion is provided at the bottom of the concave portion formed on the outer peripheral surface of the rotating member, the lubricating fluid film can be quickly utilized by utilizing the sealed fluid taken into the concave portion at the time of activation. Can be formed.
- the pumping effect can be optimized.
- the suction pumping unit can further take in the sealed fluid and send it to the discharge pumping unit, and the discharge pumping unit receives the sealed target that has been fed in. Since the fluid can be returned to the sealed fluid side further, the lubricity and leakage of the sliding surface can be further improved.
- the sealed fluid is gradually throttled to generate a dynamic pressure that acts to separate the rotating ring and the stationary ring from each other, and the sliding surface of the rotating ring and the stationary ring. During this, a lubricating film is easily formed by the fluid to be sealed, and the sliding characteristics can be improved.
- FIG. 4 is a diagram for explaining the pumping unit in FIG. 3 and shows a state during operation.
- FIG. 4A is an enlarged plan view of the main part
- FIG. 4B is a cross-sectional view taken along line XX in FIG.
- FIG. 5 is a perspective view illustrating the pumping unit of FIGS. 3 and 4 as seen from the sealed fluid side.
- FIG. 10 is a cross-sectional view illustrating another embodiment of the pumping unit according to Embodiment 3 of the present invention, cut along a plane orthogonal to the sliding surface. It is a figure explaining prior art 1. FIG. It is a top view explaining the prior art 2. FIG.
- FIG. 1 is a front sectional view showing an example of a mechanical seal for a general industrial machine.
- the mechanical seal shown in FIG. 1 is of an inside type that seals a sealed fluid that is about to leak from the outer periphery of the sliding surface toward the inner peripheral direction, and includes a pump impeller (not shown) on the sealed fluid side.
- a non-rotatable ring-shaped rotating ring 3 provided on the rotating shaft 1 side to be driven via a sleeve 2 so as to be rotatable integrally with the rotating shaft 1 and a seal cover 5 fixed to a pump housing 4
- the ring-shaped stationary ring 6 provided in a state that is movable in the axial direction is in close contact with the sliding surfaces S that are mirror-finished by lapping or the like by a bellows 7 that urges the stationary ring 6 in the axial direction. It comes to slide. That is, this mechanical seal prevents the sealed fluid from flowing out from the outer periphery of the rotating shaft 1 to the atmosphere side on the sliding surfaces S of the rotating ring 3 and the stationary ring 6.
- the rotating ring 3 and the stationary ring 6 are typically formed of SiC (hard material) or a combination of SiC (hard material) and carbon (soft material). What is used as is applicable.
- SiC includes a sintered body using boron, aluminum, carbon and the like as a sintering aid, and a material composed of two or more phases having different components and compositions, for example, SiC, SiC and Si in which graphite particles are dispersed. Reaction-sintered SiC, SiC-TiC, SiC-TiN, and the like can be used.
- As the carbon resin-molded carbon, sintered carbon, etc. can be used as well as carbon mixed with carbonaceous and graphite.
- metal materials, resin materials, surface modifying materials (coating materials), composite materials, and the like can also be applied.
- FIG. 2 is a front sectional view showing an example of a mechanical seal for a water pump.
- the mechanical seal of FIG. 2 is an inside type of a type that seals cooling water that leaks from the outer periphery of the sliding surface toward the inner peripheral direction, and drives a pump impeller (not shown) on the cooling water side.
- An annular rotary ring 3 provided on the rotary shaft 1 side through a sleeve 2 so as to be rotatable integrally with the rotary shaft 1 and a pump housing 4 in a non-rotatable and axially movable state.
- the provided annular fixed ring 6 slides closely on the sliding surfaces S mirror-finished by lapping or the like by the coiled wave spring 8 and the bellows 9 that urge the fixed ring 6 in the axial direction. It is like that. That is, this mechanical seal prevents the cooling water from flowing out from the outer periphery of the rotating shaft 1 to the atmosphere side on the sliding surfaces S of the rotating ring 3 and the stationary ring 6.
- FIG. 3 shows a case where the pumping portion is formed on the sliding surface S of the stationary ring 6 having a small radial width among the sliding surfaces of the stationary ring 6 and the rotating ring 3 in the mechanical seals of FIGS. It is a top view which shows one Embodiment.
- the stationary ring 6 is called a seal ring, and is mostly made of carbon (soft material).
- the pumping unit 10 is a part of the sliding surface S in the radial direction, and the sealed fluid accommodating space. And may be formed so as to communicate directly with each other via the inner peripheral side.
- the radial width a of the pumping portion 10 is approximately 1/3 to 2/3 of the radial width A of the sliding surface S, and the circumferential angle range b of the pumping portion 10 is the adjacent pumping. It is set to be the same as or slightly larger than the angle range B of the sliding surface existing between the portions 10 and 10.
- the pumping unit 10 includes a suction pumping unit 10a that operates in the direction of sucking the sealed fluid and a discharge pumping unit 10b that operates in the direction of discharging the sealed fluid.
- each of the pumping portions 10 has a plurality of linear irregularities parallel to each other and having a constant pitch (in the present invention, “periodic structure of linear irregularities”).
- the periodic structure of the linear irregularities is a fine structure formed by, for example, a femtosecond laser.
- linear unevenness includes, in addition to linear unevenness, slightly curved unevenness or curved unevenness appearing in the process of forming linear unevenness.
- the inner peripheral side which is the opposite side to the sealed fluid side of the sliding surface on which the pumping portion 10 is formed, needs to function as a seal dam for preventing leakage at rest. Since the sealed dam portion 13 having the sealed dam function is a portion where the sealed fluid (lubricating fluid) does not sufficiently reach, the sealed dam portion 13 is poorly lubricated and easily wears. In order to prevent wear of the seal dam portion 13 and reduce sliding friction, the seal dam portion 13 is preferably formed of a sliding material having excellent lubricity.
- FIG. 4 illustrates the pumping unit of FIG. 3 and shows a state during operation.
- FIG. 4 (a) is an enlarged plan view of the main part
- FIG. 4 (b) is a diagram of FIG. 4 (a). It is XX sectional drawing.
- the stationary ring 6 is indicated by a solid line
- the rotating ring 3 that is a counterpart sliding member is indicated by a two-dot chain line
- the rotating ring 3 rotates in the R direction.
- the plurality of pumping portions 10 are separated by the pumping portions 10 and 10 adjacent to each other in the circumferential direction and the land portion 14 of the sliding surface S, and also the sliding surface S on the atmosphere side.
- the seal dam portion 13 is not in communication.
- the pumping portion 10 is formed in a part of the sliding surface S in the radial direction, and is flush with the sliding surface S or only d1 from the sliding surface S. You may form in the bottom part of a low level
- the pumping unit 10 communicates directly with the sealed fluid storage space via the outer peripheral side 12. For this reason, since the sliding surfaces of the stationary ring 6 and the rotating ring 3 are in a solid contact state when stationary, the sealing performance is maintained by the sliding surfaces continuous in the circumferential direction.
- the sealed fluid is taken into the pumping unit 10 as indicated by an arrow with a two-dot chain line. Further, as shown in FIG.
- the linear irregularities formed in the pumping portion 10 are predetermined with respect to the sliding direction of the sliding surface S, in other words, the rotational tangential direction of the sliding surface S. It is formed so as to be inclined at an angle ⁇ .
- the predetermined angle ⁇ is preferably in the range of 10 ° to 80 ° in both the inner diameter direction and the outer diameter direction with respect to the rotational tangent of the sliding surface S.
- each pumping unit 10 has an appropriate specific inclination angle ⁇ according to the required lubricity and sliding conditions. It is effective to obtain a stable sliding characteristic by unifying the inclination angle of the unevenness.
- the inclination angle ⁇ with respect to the rotational tangent of the linear unevenness in each of the plurality of pumping portions 10 is defined as an optimum specific angle.
- the inclination angle ⁇ of each linear unevenness between the suction pumping unit 10a and the discharge pumping unit 10b is symmetric with respect to the rotation tangent. It is preferable to form such an angle. Further, it is preferable that the suction pumping unit 10a and the discharge pumping unit 10b are formed so as to be alternately arranged along the circumferential direction of the sliding surface S.
- the sliding surface S shown in FIGS. 3 and 4 is a configuration of the sliding surface S that is suitable when the sliding surface S rotates in both directions.
- the suction pumping portions 10a and the discharge pumping portions 10b may not be alternately arranged along the circumferential direction of the sliding surface S. For example, two suction pumping portions 10a and one discharge pumping portion 10b are provided. It may be arranged at a ratio of or may be arranged at an opposite ratio.
- the pumping unit 10 which is a structure (a periodic structure of linear irregularities) in which a plurality of linear irregularities parallel to each other and having a constant pitch are accurately arranged at a predetermined pitch, for example, uses a femtosecond laser.
- the moving surface S is strictly divided into predetermined regions, and further, the direction of the linear unevenness is controlled accurately in each of the partitions.
- a linearly polarized laser beam is irradiated to the substrate with an irradiation intensity near the processing threshold, a linear wave with a pitch and groove depth of the wavelength order is caused by interference between incident light and scattered light or plasma waves along the surface of the substrate.
- the irregular periodic structure is formed in a self-organizing manner orthogonal to the polarization direction. At this time, by performing the operation while overlapping the femtosecond laser, the pattern of the periodic structure of the linear irregularities can be formed on the surface.
- the directionality can be controlled and the processing position can also be controlled, so it is divided into discrete small sections for each section.
- a desired linear uneven structure can be formed. That is, if this method is used while rotating the sliding surface of the annular mechanical seal sliding material, a fine periodic pattern can be selectively formed on the sliding surface. Further, in the processing method using the femtosecond laser, it is possible to form a linear unevenness having a depth of submicron order effective for improving the lubricity of the mechanical seal and reducing the leakage.
- the formation of the pumping unit 10 is not limited to the femtosecond laser, and a picosecond laser or an electron beam may be used.
- the pumping portion 10 may be formed by stamping or engraving while rotating the sliding surface of the annular mechanical seal sliding material using a mold having a periodic structure of linear irregularities. Good. Further, when the pumping part is formed at a step lower than the sliding surface, the concave part is formed by etching, and then a periodic structure of linear irregularities is formed on the bottom part of the concave part by a femtosecond laser or the like. Good. Furthermore, by forming only a periodic structure of linear irregularities on the sliding surface by femtosecond laser, etc., and then performing plating or film formation on the sliding surface where the periodic structure of linear irregularities is not formed, The pumping unit 10 may be formed.
- the seal dam portion 13 constitutes a part of the sliding surface S and is flush with the sliding surface S.
- the seal dam portion 13 is preferably formed from a material having excellent lubricity.
- FIG. 5 is a perspective view illustrating the pumping unit of FIGS. 3 and 4 as seen from the sealed fluid side.
- a liquid film h of 0.1 ⁇ m to 10 ⁇ m is usually provided between the sliding surfaces (FIG. 4B).
- FIG. 5B shows the recess 11 formed in the sliding surface S.
- the case where the pumping part 10 is formed in the position lower by d1 than the sliding surface S is shown in the bottom part.
- the concave portion 11 is first formed by the femtosecond laser, and then the pumping portion 10 is formed.
- the pitch p of the linear irregularities of the pumping unit 10 is set according to the viscosity of the fluid to be sealed, but is preferably 0.1 ⁇ m to 100 ⁇ m. When the viscosity of the fluid to be sealed is high, it is better to increase the pitch p so that the fluid can sufficiently enter the groove.
- the sliding surface S continuous in the circumferential direction is formed to prevent leakage, and at the time of start-up, the fluid to be sealed is quickly introduced by taking the sealed fluid into the pumping unit 10.
- the sliding torque of the sliding surface S can be lowered and the wear can be reduced.
- the sealed fluid is taken into the suction pumping unit 10a, and the sealed fluid is sent to the discharge pumping unit 10b at the position separated through the land portion 14 of the sliding surface S, and the discharge pumping unit 10b. By this action, the sealed fluid is returned to the sealed fluid side.
- the lubricity of the sliding surface S can be secured, leakage can be prevented, and the sealing performance can be maintained.
- the imaginary plane connecting the tops of the concave and convex portions of the pumping unit 10 is set lower than the sliding surface S, the imaginary plane has a shape having the sliding surface S and the step d1, so that the concave portion 11 is activated at the time of activation.
- a lubricating fluid film can be quickly formed by using the sealed fluid taken in.
- FIG. 6 relates to Embodiment 1 of the present invention, and shows a dynamic pressure generating groove formed on the sliding surface S of the rotating ring 3 having a large radial width among the sliding surfaces of the stationary ring 6 and the rotating ring 3.
- FIG. 6A is a plan view
- FIG. 6B is a YY sectional view of FIG. 6A.
- the dynamic pressure generating groove 20 is a circumferential direction in which a pair of radial grooves 20a and 20b adjacent to each other constitute a plurality of sets of dynamic pressure generating grooves, and a boundary portion is a trough. Are provided with dam portions 21 that are tapered in opposite directions and that separate both radial grooves at the boundary portion.
- the dynamic pressure generating groove 20 communicates with the sealed fluid side on the outer peripheral surface of the rotary ring 3 and is configured to easily draw the sealed fluid into the groove.
- the depth of the dynamic pressure generating groove 20 gradually changes along the sliding direction in a portion extending in the circumferential direction.
- the depth of the dynamic pressure generating groove 20 is configured to be shallow in a step shape along the arrow r1 direction in the radial groove 20a, and step along the arrow r2 direction in the radial groove 20b. It is comprised so that it may become shallow.
- the dynamic pressure generating groove 20 is not limited to changing the groove depth stepwise as shown in FIG. 6B, and the groove bottom is a surface that is uniformly inclined with respect to the sliding surface S. It is good also as a structure which comprises and changes a groove depth linearly. Alternatively, a plurality of inclined surfaces having different angles may be combined, or the groove bottom surface may be formed of a curved surface and changed into a curved shape.
- the space between the dynamic pressure generating groove 20 and the sliding surface of the stationary ring 6 opposite to the dynamic pressure generating groove 20 first follows the course of the sealed fluid drawn into the groove from the sealed fluid side. As it progresses, it becomes narrower, and then becomes wider at the part that bends in the circumferential direction, but gradually becomes shallower as it advances in the circumferential direction, so that the flow of the sealed fluid is eventually reduced. As the sealed fluid is gradually squeezed, a dynamic pressure is generated that acts to separate the rotating ring 3 and the stationary ring 6 from each other. Thereby, it becomes easy to form the lubricating film by the fluid to be sealed between the sliding surfaces S of the rotating ring 3 and the stationary ring 6, and the sliding characteristics are improved.
- the dynamic pressure generating groove 20 can be formed by subjecting the mirror-finished sliding surface S to fine processing using a YVO 4 laser or sand blasting. Moreover, you may form by cutting depending on product size. In the rotating ring according to the present embodiment, the dynamic pressure generating groove is formed so that the depth at the deepest portion is 1 to 100 ⁇ m.
- FIG. 7 is a diagram illustrating a state in which the stationary ring 6 formed with the pumping portion 10 is overlapped with the rotating ring 3 formed with the dynamic pressure generating groove 20 according to the first embodiment of the present invention.
- FIG. 7A is a plan view
- FIG. 7B is a ZZ sectional view of FIG. 7A.
- the rotating ring 3 is indicated by a solid line
- the fixed ring 6 is indicated by a two-dot chain line
- a dynamic pressure generated on the pumping portion 10 formed on the sliding surface S of the fixed ring 6 and the rotating ring 3 is generated.
- the groove 20 is set so as to substantially overlap at the radial position, and the inner peripheral portions of the pumping portion 10 and the dynamic pressure generating groove 20 are also set so as to approximately match. Further, the seal dam portion 13 positioned on the inner peripheral side of the dynamic pressure generating groove 20 of the rotating ring 3 and the seal dam portion 13 positioned on the inner peripheral side of the pumping portion 10 of the stationary ring 6 also overlap each other in the radial direction so Sex is secured.
- the pumping portion 10 that causes the pumping action by the relative rotational sliding of the stationary ring 6 and the rotating ring 3 is sealed on the sliding surface S of either the stationary ring 6 or the rotating ring 3.
- a dynamic pressure generating groove 20 that generates dynamic pressure by relative rotational sliding between the fixed ring and the rotating ring communicates with the sealed fluid housing space on the other sliding surface of the fixed ring 6 or the rotating ring 3.
- the pumping portion 10 is formed on one of the sliding surfaces of the stationary ring 6 or the rotating ring 3 and the dynamic pressure generating groove 20 is formed on the other of the sliding surfaces of the stationary ring 6 or the rotating ring 3. Since the degree of freedom in design is increased and the area constituting the pumping portion 10 and the dynamic pressure generating groove 20 can be widened, the lubrication film can be sufficiently generated at the start of rotation and during rotation.
- FIG. 8 relates to the second embodiment of the present invention. Contrary to the first embodiment, the pumping portion 10 is formed on the sliding surface of the rotating ring 3, and the dynamic pressure generating groove 20 is formed on the sliding surface of the stationary ring 6. It is sectional drawing which shows the case where it forms.
- the rotating ring 3 is called a mating ring, and is mostly made of SiC (hard material).
- a plurality of pumping portions 10 separated in the circumferential direction are formed on the sliding surface S of the rotating ring 3.
- the plurality of pumping parts 10 are formed in a part of the sliding surface S except for the outer side and the inner side in the radial direction, and a part of the pumping part 10 on the sealed fluid side is opposed to the stationary ring 6. It is formed so as not to be covered with the sliding surface S.
- the stationary ring 6 is called a seal ring, and is mostly made of carbon (soft material).
- a dynamic pressure generating groove 20 is formed on the sliding surface S of the stationary ring 6. The outer peripheral side of the dynamic pressure generating groove 20 communicates with the sealed fluid side.
- a seal dam portion 13 made of a sliding material having excellent lubricity is formed on the inner peripheral side (atmosphere side) from the area of the pumping portion 10 on the sliding surface S of the rotating ring 3 and on the inner peripheral side (atmosphere side) from the area of the dynamic pressure generating groove 20 on the sliding surface S of the stationary ring 6.
- a seal dam portion 13 made of a sliding material having excellent lubricity is formed on the inner peripheral side (atmosphere side) from the area of the pumping portion 10 on the sliding surface S of the rotating ring 3 and on the inner peripheral side (atmosphere side) from the area of the dynamic pressure generating groove 20 on the sliding surface S of the stationary ring 6.
- FIG. 9 shows another embodiment of the pumping unit according to the third embodiment of the present invention, and is a cross-sectional view cut along a plane orthogonal to the sliding surface.
- the pumping unit 10 is formed in parallel to a plane orthogonal to the axis in the circumferential direction and the radial direction.
- the suction pumping unit 10a has a linear shape in the circumferential direction.
- the unevenness is formed so as to gradually become higher (shallow) in the rotation direction R of the rotating ring 3 that is the counterpart sliding material, and the discharge pumping unit 10b is a rotation whose linear unevenness is the counterpart sliding material.
- the sealed fluid can be taken in and sent to the discharge pumping unit 10b. In the discharge pumping unit 10b, the sent sealed fluid can be further returned to the sealed fluid side.
- the deepest portion of the virtual plane connecting the vertices of the irregularities of the pumping portion from the sliding surface, and The depth of the shallowest part may be set so as to fall within the range of 0 to 10h.
- the pumping 10 can be arbitrarily inclined as necessary in the circumferential direction and / or the radial direction.
- the suction pumping unit 10 a is formed so as to be gradually lowered toward the inside in the radial direction to facilitate suction of the sealed fluid
- the discharge pumping unit 10 b It can be considered that the sealing fluid is formed so as to gradually increase inward in the radial direction so that the sealed fluid can be easily discharged.
- the deepest portion of the virtual plane connecting the vertices of the irregularities of the pumping portion from the sliding surface may be set so as to fall within the range of 0 to 10h.
- the pumping portion 10 and the dynamic pressure generating groove 20 are formed facing the inside.
- the pumping part 10 may be arranged so that a part of the radially inner side of the pumping part 10 is not covered by the opposed sliding surfaces.
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Abstract
Description
摺動部品が相対回転すると、図10(b)に示すように、ガス流Gの上流側の半径方向溝32Rにおいて圧力が低下して負の浮力が作用し、ダム部34を越えた下流側の半径方向溝32Lの部分でテーパ面33Lのくさび作用によって圧力が増大し正の浮力が発生する。その際、ダム部34の作用によって負の圧力は小さく、正の圧力が大きくなり、全体として正の圧力が作用し、大きな浮力が得られるというものである。
前記固定環または回転環のいずれか一方の摺動面には、固定環と回転環との相対回転摺動によりポンピング作用を生起するポンピング部が被密封流体収容空間と連通するように円周方向に分離されて複数形成され、
前記複数のポンピング部は、被密封流体を吸い込む方向に作用する吸入ポンピング部と被密封流体を吐き出す方向に作用する吐出ポンピング部を備え、
前記固定環または回転環の他方の摺動面には、固定環と回転環との相対回転摺動により動圧を発生する動圧発生溝が被密封流体収容空間と連通するように円周方向に複数形成されることを特徴としている。
また、本発明の摺動部品は、第4に、第3の特徴において、前記前記ポンピング部の線状の凹凸の周期構造は、隣接するポンピング部の前記線状の凹凸の方向が当該摺動面の摺動方向に対して対称となるように形成されていることを特徴としている。
また、本発明の摺動部品は、第5に、第3または第4の特徴において、前記ポンピング部の線状の凹凸の周期構造は、フェムト秒レーザの照射により形成されることを特徴としている。
また、本発明の摺動部品は、第9に、第8の特徴において、前記吸入ポンピング部は、側面視において線状の凹凸が相手側摺動部材の回転方向に向かって次第に高くなるように形成され、吐出ポンピング部は、側面視において線状の凹凸が相手側摺動部材の回転方向に向かって次第に低くなるように形成されていることを特徴としている。
また、本発明の摺動部品は、第10に、第8または第9の特徴において、前記吸入ポンピング部は、側面視において線状の凹凸が内周方向に向かって次第に低くなるように形成され、吐出ポンピング部は、側面視において線状の凹凸が外周方向に向かって次第に低くなるように形成されていることを特徴としている。
また、本発明の摺動部品は、第12に、第11の特徴において、前記動圧発生溝は、摺動面の外周側端部から内周側に向かって略径方向に延びるとともに、内周側において折れ曲がって略周方向に延びる略L字状の溝の形状をなしていることを特徴としている。
(1)上記第1及び第2の特徴により、静止時には漏れず、また、回転し始めの低速時においては被密封流体がポンピング部に取り込まれるとともに摺動面に潤滑膜が生成されるため、十分潤滑することができ、摺動抵抗を低く、安定した摺動特性を得ることができる。さらに、回転時においては、動圧発生溝により摺動面に動圧が発生されて、回転環と固定環の摺動面に間に被密封流体による潤滑膜が形成され、摺動特性が向上される。
さらに、ポンピング部を固定環または回転環の摺動面のいずれか一方に、また、動圧発生溝を固定環または回転環の摺動面の他方に形成することにり、設計の自由度が増大され、ポンピング部及び動圧発生溝を構成する面積が広くとれるので、回転し始め及び回転時における潤滑膜の生成を十分に行うことができる。
(3)上記第4の特徴により、摺動面が両方向に回転する場合に好適である。
(4)上記第5の特徴により、ポンピング部の線状の凹凸の周期構造がフェムト秒レーザの照射により形成されるため、その方向性の制御が可能であり、加工位置の制御も可能であるため、離散的な小区画に分けて各区画ごとに所望の周期構造の形成ができる。
(6)上記第7の特徴により、ポンピング効果を最良のものとすることができる。
なお、本実施形態においてはメカニカルシールを構成する部品が摺動部品である場合を例にして説明するが、本発明はこれに限定されて解釈されるものではなく、本発明の範囲を逸脱しない限りにおいて、当業者の知識に基づいて、種々の変更、修正、改良を加えうるものである。
図1のメカニカルシールは摺動面の外周から内周方向に向かって漏れようとする被密封流体を密封する形式のインサイド形式のものであって、被密封流体側のポンプインペラ(図示省略)を駆動させる回転軸1側にスリーブ2を介してこの回転軸1と一体的に回転可能な状態に設けられた円環状の回転環3と、ポンプのハウジング4に固定されたシールカバー5に非回転状態かつ軸方向移動可能な状態で設けられた円環状の固定環6とが、この固定環6を軸方向に付勢するベローズ7によって、ラッピング等によって鏡面仕上げされた摺動面S同士で密接摺動するようになっている。すなわち、このメカニカルシールは、回転環3と固定環6との互いの摺動面Sにおいて、被密封流体が回転軸1の外周から大気側へ流出するのを防止するものである。
回転環3及び固定環6は、代表的にはSiC(硬質材料)同士またはSiC(硬質材料)とカーボン(軟質材料)の組み合わせで形成されるが、摺動材料にはメカニカルシール用摺動材料として使用されているものは適用可能である。SiCとしては、ボロン、アルミニウム、カーボンなどを焼結助剤とした焼結体をはじめ、成分、組成の異なる2種類以上の相からなる材料、例えば、黒鉛粒子の分散したSiC、SiCとSiからなる反応焼結SiC、SiC-TiC、SiC-TiNなどがあり、カーボンとしては、炭素質と黒鉛質の混合したカーボンをはじめ、樹脂成形カーボン、焼結カーボン、などが利用できる。また、上記摺動材料以外では、金属材料、樹脂材料、表面改質材料(コーティング材料)、複合材料なども適用できる。
図2のメカニカルシールは摺動面の外周から内周方向に向かって漏れようとする冷却水を密封する形式のインサイド形式のものであって、冷却水側のポンプインペラ(図示省略)を駆動させる回転軸1側にスリーブ2を介してこの回転軸1と一体的に回転可能な状態に設けられた円環状の回転環3と、ポンプのハウジング4に非回転状態かつ軸方向移動可能な状態で設けられた円環状の固定環6とが、この固定環6を軸方向に付勢するコイルドウェーブスプリング8及びベローズ9によって、ラッピング等によって鏡面仕上げされた摺動面S同士で密接摺動するようになっている。すなわち、このメカニカルシールは、回転環3と固定環6との互いの摺動面Sにおいて、冷却水が回転軸1の外周から大気側へ流出するのを防止するものである。
図3は、図1及び2のメカニカルシールにおいて、固定環6及び回転環3の摺動面のうち、径方向の幅が小さい固定環6の摺動面Sにポンピング部が形成される場合の一実施形態を示す平面図である。
図3において、固定環6は、シールリングと呼ばれ、多くは、カーボン(軟質材料)から形成される。この固定環6の摺動面Sには、円周方向に分離された複数のポンピング部10が、摺動面Sの径方向の一部であって被密封流体収容空間と外周側12を介して直接連通するように形成されている。
なお、被密封流体側が回転環3及び固定環6の内側に存在するアウトサイド形のメカニカルシールの場合、ポンピング部10は、摺動面Sの径方向の一部であって被密封流体収容空間と内周側を介して直接連通するように形成すればよい。
ポンピング部10の径方向の幅aは、摺動面Sの径方向の幅Aのおよそ1/3~2/3であり、また、ポンピング部10の周方向の角度範囲bは、隣接するポンピング部10、10間に存在する摺動面の角度範囲Bと同じかやや大きく設定される。
なお、本発明において「線状の凹凸」には、直線状の凹凸の他、直線状の凹凸形成の過程で出現される多少彎曲された凹凸、または曲線状の凹凸も包含される。
図4において、固定環6は実線で、また、相手側摺動部材である回転環3は二点差線で示されており、回転環3はR方向に回転する。
図4(a)に示すように、複数のポンピング部10は、円周方向において隣接するポンピング部10、10と摺動面Sのランド部14により分離され、また、大気側とも摺動面Sのシールダム部13により非連通となっている。また、図4(b)に示すように、ポンピング部10は、摺動面Sの径方向の一部に形成されており、摺動面Sと面一、あるいは、摺動面Sよりd1だけ低い段差の底部に形成されてもよい(段差d1については後に詳細に説明する。)。また、ポンピング部10は、被密封流体収容空間とは外周側12を介して直接連通している。このため、静止時には、固定環6及び回転環3の摺動面間は固体接触状態となるため、円周方向に連続した摺動面によりシール性が維持されるとともに、起動時においては、図4(a)において二点差線の矢印で示すように、ポンピング部10へ被密封流体の取り込みが行われるようになっている。
さらに、図4(a)に示すように、ポンピング部10に形成される線状の凹凸は、摺動面Sの摺動方向、換言すれば摺動面Sの回転接線方向に対して所定の角度θで傾斜するように形成される。所定の角度θは、摺動面Sの回転接線に対して内径方向及び外径方向の両方向において各々10°~80°の範囲であることが好ましい。
また、吸入ポンピング部10aと吐出ポンピング部10bとは、摺動面Sの周方向に沿って交互に配置されるように形成するのが好適である。
図3及び図4に示す摺動面Sは、そのような摺動面Sが両方向へ回転する場合に好適な摺動面Sの構成である。
なお、吸入ポンピング部10aと吐出ポンピング部10bとは、摺動面Sの周方向に沿って交互に配置されなくてもよく、例えば、吸入ポンピング部10aが2個、吐出ポンピング部10bが1個の割合で配置されても、あるいは、逆の割合で配置されてもよい。
加工しきい値近傍の照射強度で直線偏光のレーザを基板に照射すると、入射光と基板の表面に沿った散乱光又はプラズマ波の干渉により、波長オーダーのピッチと溝深さを持つ線状の凹凸の周期構造が偏光方向に直交して自己組織的に形成される。この時、フェムト秒レーザをオーバーラップさせながら操作を行うことにより、その線状の凹凸の周期構造のパターンを表面に形成することができる。
さらに、前記ポンピング部が摺動面より低い段差に形成される場合、凹部の形成は、エッチングで行い、その後、フェムト秒レーザなどにより凹部の底部に線状の凹凸の周期構造を形成させてもよい。さらに、フェムト秒レーザなどにより、摺動面に線状の凹凸の周期構造のみ形成させ、その後、線状の凹凸の周期構造が形成されていない摺動面にメッキあるいは成膜を行うことで、ポンピング部10を形成させてもよい。
固定部材と回転部材と摺動面を低摩擦化させるためには、被密封流体の種類、温度などによるが、通常、摺動面間に0.1μm~10μmの液膜h(図4(b)参照。)が形成されるが、その場合、ポンピング部10において、凹凸の頂点を結ぶような仮想平面をとると、該仮想平面は液膜hに応じてd1=0~10hの範囲で摺動面Sと面一か、あるいは、摺動面Sより低く設定されている。図5(a)には、d1=0、すなわち、仮想平面が摺動面Sと面一の場合が示され、また、図5(b)には、摺動面Sに形成された凹部11の底部に摺動面Sよりd1だけ低い位置にポンピング部10が形成される場合が示されている。仮想平面が摺動面Sより低く形成される場合、凹部11内の空間に被密封流体が取り込まれ、ポンピング部10により被密封流体が大気側に漏れないような液体の流れが生起されるのである。
また、凹凸の頂点と底部との深さd2は、d2=0.1h~10hの範囲が望ましい。
ポンピング部10の線状の凹凸のピッチpは、被密封流体の粘度に応じて設定されるが、0.1μm~100μmが望ましい。被密封流体の粘度が高い場合、溝内に流体が十分に入り込めるようにピッチpを大きくした方がよい。
前記動圧発生溝20は、互いに隣り合う一対の半径方向溝20a、20bを一組として複数組の動圧発生用溝組を構成する半径方向溝を境界部が谷となるように円周方向に沿って互いに逆向きのテーパ形状とし、境界部に両半径方向溝を隔てるダム部21を設けてなるものである。
図6(a)に示される動圧発生溝20は、回転環3の摺動面Sの外周側端部から内周側に向かって略径方向に延びるとともに、内周側において折れ曲がって略周方向に延びる略L字状の形状をしている。動圧発生溝20は、回転環3の外周面で被密封流体側に連通しており、被密封流体を溝内に引き込みやすく構成されている。
なお、動圧発生溝20は、溝の深さを図6(b)に示すようにステップ状に変化させるのに限らず、溝底を摺動面Sに対して一様に傾斜した面で構成し、溝深さを直線的に変化させる構成としてもよい。あるいは、角度の異なる複数の傾斜面を組み合わせたり、溝底面を曲面で構成し曲線状に変化させてもよい。
図7において、回転環3は実線で、固定環6は二点鎖線で示されており、固定環6の摺動面Sに形成されたポンピング部10と回転環3に形成された動圧発生溝20とが径方向の位置においておおよそ重複するように設定され、ポンピング部10及び動圧発生溝20の内周部分もおおよそ一致するように設定されている。また、回転環3の動圧発生溝20の内周側に位置するシールダム部13と固定環6のポンピング部10の内周側に位置するシールダム部13も径方向においておおよそ重なり、静止時におけるシール性が確保される。
さらに、ポンピング部10を固定環6または回転環3の摺動面のいずれか一方に、また、動圧発生溝20を固定環6または回転環3の摺動面の他方に形成することにり、設計の自由度が増大され、ポンピング部10及び動圧発生溝20を構成する面積が広くとれるので、回転し始め及び回転時における潤滑膜の生成を十分に行うことができる。
図8は、本発明の実施形態2に係り、実施形態1とは逆に、回転環3の摺動面にポンピング部10が形成され、固定環6の摺動面に動圧発生溝20が形成される場合を示す断面図である。
図8において、回転環3は、メイティングリングと呼ばれ、多くは、SiC(硬質材料)から形成される。この回転環3の摺動面Sに、円周方向に分離された複数のポンピング部10が形成されている。これら複数のポンピング部10は、摺動面Sの径方向の外方及び内方を残して一部に形成され、かつ、ポンピング部10の被密封流体側の一部が相対する固定環6の摺動面Sで覆われないように形成されるものである。
固定環6は、シールリングと呼ばれ、多くはカーボン(軟質材料)から形成される。この固定環6の摺動面Sに動圧発生溝20が形成されている。動圧発生溝20は外周側が被密封流体側と連通している。
図9は、本発明の実施形態3に係り、ポンピング部の他の実施形態を示すもので、摺動面に直交する面で切断した断面図である。
実施形態1において、ポンピング部10は、円周方向及び径方向において軸と直交する面と平行に形成されているが、図9においては、吸入ポンピング部10aは、周方向において、その線状の凹凸が相手側摺動材である回転環3の回転方向Rに向かって次第に高く(浅く)なるように形成され、吐出ポンピング部10bは、その線状の凹凸が相手側摺動材である回転環3の回転方向Rに向かって次第に低く(深く)なるように形成されている。
このように、線状の凹凸が、平面から見た際の回転接線に対する傾斜に加えて、側面から見ても周方向に傾斜して形成されていることから、吸入ポンピング部10aにおいては、より一層、被密封流体を取り込んで吐出ポンピング部10bに送り込むことができ、また、吐出ポンピング部10bにおいては、送り込まれた被密封流体を、より一層、被密封流体側に戻すことができる。
本例の場合、前記固定環と回転環との摺動面間に形成される液膜厚さをhとした場合、摺動面からのポンピング部の凹凸の頂点を結ぶ仮想平面の最深部及び最浅部の深さが、0~10hの範囲内に入るように設定されればよい。
本例の場合も、前記固定環と回転環との摺動面間に形成される液膜厚さをhとした場合、摺動面からのポンピング部の凹凸の頂点を結ぶ仮想平面の最深部及び最浅部の深さが、0~10hの範囲内に入るように設定されればよい。
2 スリーブ
3 回転環
4 ハウジング
5 シールカバー
6 固定環
7 ベローズ
8 コイルドウェーブスプリング
9 ベローズ
10 ポンピング部
10a 吸入ポンピング部
10b 吐出ポンピング部
11 凹部
12 外周側
13 シールダム部
14 ランド部
20 動圧発生溝
20a、20b 一対の半径方向溝
21 ダム部
S 摺動面
Claims (12)
- 固定側に固定される円環状の固定環と、回転軸とともに回転する円環状の回転環とが対向して各摺動面を相対回転させることにより、当該相対回転摺動する前記摺動面の径方向の一方側に存在する被密封流体を密封する摺動部品において、
前記固定環または回転環のいずれか一方の摺動面には、固定環と回転環との相対回転摺動によりポンピング作用を生起するポンピング部が被密封流体収容空間と連通するように円周方向に分離されて複数形成され、
前記複数のポンピング部は、被密封流体を吸い込む方向に作用する吸入ポンピング部と被密封流体を吐き出す方向に作用する吐出ポンピング部を備え、
前記固定環または回転環の他方の摺動面には、固定環と回転環との相対回転摺動により動圧を発生する動圧発生溝が被密封流体収容空間と連通するように円周方向に複数形成されることを特徴とする摺動部品。 - 前記ポンピング部は前記固定環に形成され、前記動圧発生溝は前記回転環に形成されることを特徴とする請求項1記載の摺動部品。
- 前記ポンピング部は、線状の凹凸の周期構造の構成をしており、前記線状の凹凸は、当該凹凸の方向が当該摺動面の摺動方向に対して所定の角度傾斜するように形成されていることを特徴とする請求項1または2記載の軸封装置。
- 前記ポンピング部の前記線状の凹凸の周期構造は、隣接するポンピング部の前記線状の凹凸の方向が当該摺動面の摺動方向に対して対称となるように形成されていることを特徴とする請求項3記載の軸封装置。
- 前記ポンピング部の前記線状の凹凸の周期構造は、フェムト秒レーザの照射により形成されることを特徴とする請求項3または4記載の軸封装置。
- 前記ポンピング部は、摺動面に形成された複数の凹部の底部に設けられることを特徴とする請求項1ないし5のいずれか1項に記載の摺動部品。
- 前記固定環と回転環との摺動面間に形成される液膜厚さをhとした場合、摺動面からのポンピング部の線状の凹凸の頂点を結ぶ仮想平面の深さd1が、d1=0~10hの範囲に設定され、また、ポンピング部の線状の凹凸の深さd2が、d2=0.1h~10hの範囲に設定されることを特徴とする請求項3ないし6のいずれか1項に記載のメカニカルシール。
- 前記吸入ポンピング部及び吐出ポンピング部は、側面視において線状の凹凸が円周方向または/及び径方向において、それぞれ任意に傾斜して形成されていることを特徴とする請求項3ないし7のいずれか1項に記載のメカニカルシール。
- 前記吸入ポンピング部は、側面視において線状の凹凸が相手側摺動部材の回転方向に向かって次第に高くなるように形成され、吐出ポンピング部は、側面視において線状の凹凸が相手側摺動部材の回転方向に向かって次第に低くなるように形成されていることを特徴とする請求項8記載のメカニカルシール。
- 前記吸入ポンピング部は、側面視において線状の凹凸が内周方向に向かって次第に低くなるように形成され、吐出ポンピング部は、側面視において線状の凹凸が外周方向に向かって次第に低くなるように形成されていることを特徴とする請求項8または9記載のメカニカルシール。
- 前記動圧発生溝は、互いに隣り合う一対の半径方向溝を一組として複数組の動圧発生用溝組を構成する半径方向溝を境界部が谷となるように円周方向に沿って互いに逆向きのテーパ形状とし、境界部に両半径方向溝を隔てるダム部を設けてなることを特徴とする請求項1ないし10のいずれか1項に記載の摺動部品。
- 前記動圧発生溝は、摺動面の外周側端部から内周側に向かって略径方向に延びるとともに、内周側において折れ曲がって略周方向に延びる略L字状の溝の形状をなしていることを特徴とする請求項11記載の摺動部品。
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| JP2013532516A JP5960145B2 (ja) | 2011-09-10 | 2012-08-13 | 摺動部品及びその製造方法 |
| CN201280040600.XA CN103765060B (zh) | 2011-09-10 | 2012-08-13 | 滑动部件 |
| US14/240,625 US9151390B2 (en) | 2011-09-10 | 2012-08-13 | Sliding parts |
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| JP2011197731 | 2011-09-10 | ||
| JP2011-197731 | 2011-09-10 |
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| US (1) | US9151390B2 (ja) |
| EP (1) | EP2754931B1 (ja) |
| JP (1) | JP5960145B2 (ja) |
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| WO (1) | WO2013035502A1 (ja) |
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| EP3048341A4 (en) * | 2013-09-18 | 2017-04-26 | Eagle Industry Co., Ltd. | Sliding component |
| US12385567B2 (en) | 2019-02-04 | 2025-08-12 | Eagle Industry Co., Ltd. | Sliding component |
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| JP7369151B2 (ja) | 2019-02-15 | 2023-10-25 | イーグル工業株式会社 | 摺動部品 |
| US11821461B2 (en) | 2019-02-15 | 2023-11-21 | Eagle Industry Co., Ltd. | Sliding components |
| CN113508238A (zh) * | 2019-03-22 | 2021-10-15 | 伊格尔工业股份有限公司 | 滑动部件 |
| CN114829813A (zh) * | 2019-12-17 | 2022-07-29 | 伊格尔工业股份有限公司 | 滑动部件 |
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| US12140179B2 (en) | 2020-03-26 | 2024-11-12 | Eagle Industry Co., Ltd. | Sliding component |
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| JP7746257B2 (ja) | 2020-04-22 | 2025-09-30 | イーグル工業株式会社 | 一対の摺動部品 |
| US12516737B2 (en) | 2020-09-29 | 2026-01-06 | Eagle Industry Co., Ltd. | Sliding component |
| US12281671B2 (en) | 2020-10-14 | 2025-04-22 | Eagle Industry Co., Ltd. | Sliding component |
Also Published As
| Publication number | Publication date |
|---|---|
| US20140197600A1 (en) | 2014-07-17 |
| US9151390B2 (en) | 2015-10-06 |
| JPWO2013035502A1 (ja) | 2015-03-23 |
| EP2754931A4 (en) | 2015-07-15 |
| JP5960145B2 (ja) | 2016-08-02 |
| EP2754931A1 (en) | 2014-07-16 |
| EP2754931B1 (en) | 2018-04-18 |
| CN103765060B (zh) | 2017-02-15 |
| CN103765060A (zh) | 2014-04-30 |
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