WO2015072275A1 - 分割型メカニカルシール - Google Patents
分割型メカニカルシール Download PDFInfo
- Publication number
- WO2015072275A1 WO2015072275A1 PCT/JP2014/077549 JP2014077549W WO2015072275A1 WO 2015072275 A1 WO2015072275 A1 WO 2015072275A1 JP 2014077549 W JP2014077549 W JP 2014077549W WO 2015072275 A1 WO2015072275 A1 WO 2015072275A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- divided
- split
- tube
- seal
- seal ring
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims description 46
- 239000002184 metal Substances 0.000 claims description 18
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 239000000057 synthetic resin Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 description 15
- 239000000463 material Substances 0.000 description 13
- 230000011218 segmentation Effects 0.000 description 12
- 230000004323 axial length Effects 0.000 description 8
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 238000003754 machining Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 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
- F16J15/3464—Mounting of the seal
- F16J15/3488—Split-rings
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/004—Sealing; Insulation
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/08—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
- F16B13/0858—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation with an expansible sleeve or dowel body driven against a tapered or spherical expander plug
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B29/00—Screwed connection with deformation of nut or auxiliary member while fastening
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/0258—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread using resiliently deformable sleeves, grommets or inserts
Definitions
- the present invention is used for various rotating machinery such as a stirrer, a compressor, and a pump, and is configured to be sealed by a sealing end surface that is an opposing end surface of a stationary sealing ring and a rotating sealing ring.
- the present invention relates to a split type mechanical seal in which a stationary seal ring or a rotary seal ring is divided in the circumferential direction.
- a split-type mechanical seal As a split-type mechanical seal, a stationary seal ring and a rotary seal ring are divided into at least two pieces by at least two split surfaces in the radial direction, and protrusions and grooves that are fitted to the split surfaces are formed.
- the protrusion and the groove are provided over the entire axial direction between the edge on one end face side of the dividing surface and the edge on the other end face side, and a flange is provided on the opposite side of the seal face.
- Patent Document 1 hereinafter referred to as “Prior Art 1”.
- the stationary sealing ring is composed of a plurality of divided bodies in the circumferential direction, inserted into the mounting hole and held in an annular shape
- the rotary sealing ring is composed of two divided bodies.
- the two divided bodies are connected to each other by a connecting bolt, and are inserted in close contact with a tapered hole formed over the two divided bodies so as to pass through the butting surfaces of the two divided bodies, and an inner surface of the tapered hole.
- a device including a taper pin and a fixture for fixing the taper pin inserted into the taper hole is known (see, for example, Patent Document 2, hereinafter referred to as “Prior Art 2”).
- a protrusion and a groove that are fitted to the split surface are formed to align the split surface in the radial direction, and the split surface has a position in the axial direction.
- the required accuracy level of the protrusions and grooves provided on the split surface and the flange provided on the opposite side of the seal surface is high, and a little accuracy Even if an error occurs, there is a problem that the cost is high because it takes a machining time because it is directly connected to the leakage.
- the present invention improves the assembly accuracy on the divided contact surface in the split type mechanical seal divided in the circumferential direction, improves the workability at the time of temporary assembly, and further requires excessive accuracy for machining at the time of manufacture.
- An object of the present invention is to provide a split mechanical seal that does not.
- the split mechanical seal of the present invention firstly divides the stationary seal ring provided on the housing side or the rotary seal ring provided on the rotary shaft inserted into the housing in the circumferential direction.
- a split type mechanical seal configured to be sealed by a sealing end face that is an opposing end face of the stationary sealing ring and the rotary sealing ring, and is divided into two split sealing rings adjacent in the circumferential direction
- a through hole formed over the two divided seal rings so as to pass through the divided contact surfaces of the two, and a coupling member that is inserted into the through hole and connects the two adjacent divided seal rings.
- the tool is composed of a bolt, a nut, and a tube fitted to the shaft portion of the bolt.
- the tube has two adjacent divided sealing rings for tightening the nut.
- Ri When coupled Ri, it is characterized by being configured to be bulged radially outward is compressed in the axial direction. According to this feature, the accuracy of assembly on the split contact surface of the split seal ring is ensured in the radial direction and the axial direction.
- hit confirmation and hit improvement work such as a conventionally known metal taper pin can be eliminated, the processing time can be greatly shortened.
- accuracy work is required, but since the tube of the connector follows the shape and dimensions of the through hole, accuracy work is not required and workability is improved. Is done.
- the split in the state where the nut of the connector is not fastened The divided seal ring can be stably held during operations such as adjustment of the split contact surface of the seal ring. That is, temporary assembly work can be facilitated.
- the deformation amount of the tube can be adjusted by the screwing amount of the nut, it is possible to flexibly cope with the situation at the time of work.
- the split mechanical seal of the present invention is secondly characterized in that, in the first feature, the tube is a cylindrical body made of synthetic resin. According to this feature, workability can be improved because the insertability of the coupler into the through-hole of the split seal ring and the resistance against each other are moderately good.
- the split type mechanical seal of the present invention is characterized in that, in the second feature, the outer diameter of the shaft portion of the bolt is set larger than the inner diameter of the tube. According to this feature, deformation of the tube toward the inner diameter side can be prevented, and the tube can be efficiently expanded toward the outer diameter side.
- the tube is made of a deformable metal and has a helical linear body or a cut surface in the longitudinal direction. It is characterized by being a cylindrical body. According to this feature, a tube capable of bulging in the outer diameter direction can be obtained by machining.
- the tube is previously formed in a shape that can easily bulge in the outer diameter direction near the center in the axial direction. It is characterized by. According to this feature, it is possible to reliably prevent deformation of the tube toward the inner diameter side and efficiently bulge to the outer diameter side.
- the tube has a tapered surface at both ends so that the tube can easily bulge in the outer diameter direction near the center in the axial direction. It is characterized by being supported by. According to this feature, deformation of the tube toward the inner diameter side can be further prevented and the tube can be efficiently bulged toward the outer diameter side.
- a split mechanical seal in which the stationary seal ring provided on the housing side or the rotary seal ring provided on the rotary shaft inserted into the housing is divided in the circumferential direction.
- a split mechanical seal configured to be sealed by a sealing end face that is an opposing end face of the stationary sealing ring and the rotary sealing ring, without a ring, A through hole formed over the two divided seal rings so as to pass through the divided contact surfaces of two divided seal rings adjacent in the circumferential direction, and a female screw formed in one of the through holes of the two divided seal rings
- a connector that is inserted into the through hole and connects the two adjacent divided seal rings, and the connector includes a bolt and a tube that is fitted to the shaft portion of the bolt.
- the tube When the two adjacent divided sealing rings are connected by tightening the bolt, the tube is compressed in the axial direction by the one divided sealing ring formed with the bolt and the female thread portion, and has an outer diameter. It is characterized by being configured to bulge in the direction. According to this feature, the number of parts can be reduced because no nut is required, and the bolt can be easily screwed in even when the flange portion is fastened by the coupling tool.
- the present invention has the following excellent effects.
- (1) The assembling accuracy on the split contact surface of the split seal ring can be ensured in the radial direction and the axial direction.
- the hit confirmation and hit improvement work such as a conventionally known metal taper pin can be eliminated, the processing time can be greatly shortened.
- accuracy work is required, but since the tube of the connector follows the shape and dimensions of the through hole, accuracy work is not required and workability is improved. Is done.
- the split in the state where the nut of the connector is not fastened The divided seal ring can be stably held during operations such as adjustment of the split contact surface of the seal ring. That is, temporary assembly work can be facilitated.
- the deformation amount of the tube can be adjusted by the screwing amount of the nut, it is possible to flexibly cope with the situation at the time of work.
- the tube is a cylindrical body made of synthetic resin, workability can be improved because the insertability of the coupler into the through-hole of the split seal ring and the opposing resistance are moderately good.
- the tube is made of a deformable metal and is a spiral linear body or a tubular body having a cut surface in the longitudinal direction, so that the tube can bulge in the outer diameter direction. Can be obtained by machining.
- the tube is formed in advance in a shape that can easily bulge in the outer diameter direction near the center in the axial direction, thereby reliably preventing deformation of the tube toward the inner diameter side. Can be efficiently inflated.
- the tube Since the tube is supported by tapered surfaces at both ends so that it can easily bulge in the outer diameter direction near the center in the axial direction, the tube is further prevented from being deformed toward the inner diameter side, thereby improving efficiency. It can well bulge to the outer diameter side.
- FIG. 2 shows a split-type mechanical seal according to a second embodiment of the present invention, in which (a) is a cross-sectional view showing a state in which a connector is mounted on the split contact surface of two adjacent split seal rings; The disassembled state of the coupler is shown.
- a stationary seal ring provided on the housing side and a rotation provided on a rotary shaft inserted into the housing are provided.
- An example of a completely divided mechanical seal in which both seal rings of the seal ring are divided will be described.
- the present invention is not limited to this, and a stationary seal ring provided on the housing side or a rotating shaft inserted into the housing
- a split-type mechanical seal in which at least one of the rotary seal rings provided in the is divided.
- FIG. 1 is a front cross-sectional view illustrating the whole of the split mechanical seal according to the present embodiment, where the right side of the drawing is the sealed fluid region X and the left side is the non-sealed fluid region (atmosphere region).
- the split-type mechanical seal includes a seal case 2 attached to a shaft seal portion 1a of a rotating shaft insertion portion of a housing 1 such as a pump, and a seal case 2
- a stationary seal ring 4 that is movable in the axial direction via the split retainer 3 and is held so as not to rotate relative to the stationary seal ring 3, and a split retainer 6 disposed on the left side of the stationary seal ring 4 on a rotary shaft 5 such as a pump.
- a rotary seal ring 7 fixed via a spring, and a spring which is interposed between the seal case 2 and the split retainer 3 and biases the stationary seal ring 4 to the left so as to press and contact the rotary seal ring 7.
- the area communicating with the housing 1) X and its It is configured outside mechanical seal to shield the A (atmospheric region outside the housing 1 of the pump, etc.) non-sealed fluid region that is a peripheral region.
- the outside mechanical seal is described as an example.
- the present invention is not limited to the outside mechanical seal but can be applied to other types, for example, the inside mechanical seal.
- the seal case 2 forms an annular body having an inner peripheral portion larger in diameter than the rotary shaft 5, and the shaft of the housing 1 is inserted in a state where the rotary shaft 5 is concentrically inserted. It is attached to the sealing part 1a with an unillustrated bolt through an O-ring 9.
- the stationary sealing ring 4 has a sealing end face 4a on one end face, and is an annular body as shown in FIG. 2, and is divided into a plurality of (two in this example) arcs in the circumferential direction. It is divided into seal rings 12 and 13 and has a ring shape in which divided contact surfaces (circumferential end surfaces of the arcuate divided bodies 12 and 13) 12a and 13a are in close contact with each other, and as described later, The inner fit is retained.
- the rotary seal ring 7 has a sealed end surface 7a on one end surface, is an annular body, and is divided into a plurality of arcs (two in this example) in the circumferential direction. It is divided into sealing rings, and has an annular shape in which the dividing contact surface (circumferential end surface of the arcuate divided body) is in close contact, and is internally fitted and held by the divided retainer 6 as will be described later.
- the divided seal ring constituting the rotary seal ring 7 may also be expressed as “7 (12, 13)” using the same reference numerals 12 and 13 as in the case of the stationary seal ring 4.
- the split retainer 6 that internally fits and holds the rotary seal ring 7 is fixedly held on the rotary shaft 5 via a rotary ring collar 14 fixed to the rotary shaft 5. That is, the rotary ring collar 14 is divided in the circumferential direction, and is fitted and fixed to the rotary shaft 5 by being fastened in a ring shape by the fastening bolt 15. Between the rotary ring collar 14 and the split retainer 6, a spring 16 that biases the rotary seal ring 7 to the right so as to press and contact the stationary seal ring 4 is interposed.
- the rotary seal ring 7 is made of a hard material such as silicon carbide, and the stationary seal ring 4 is made of softer self-lubricating carbon than the rotary seal ring 7.
- the split retainer 3 that holds and holds the stationary seal ring 4 and the split retainer 6 that holds and holds the rotary seal ring 7 are attached to the sealing end faces 4a and 7a in contrast. Have the same structure.
- the sectional shape on the outer peripheral side of the divided sealing ring 4 (12, 13) constituting the stationary sealing ring 4 has a step part 21 having a high central part 20 in the width direction and a vertical side surface opposite to the sealing end face 4a.
- the side face on the side of the sealing end face 4a has an inclined step portion 22 having an obtuse angle, and both sides have a low shape.
- a lower portion on the side having the vertical stepped portion 21 is extended, and a split O-ring 23 that seals between the seal case 2 and the seal portion 2 is attached.
- the above-described sealed end face 4a is formed at the end of the lower portion having the step portion 22 having an inclined surface having an obtuse angle.
- the stationary side retainer 3 is made of stainless steel and has an annular shape and is divided into a plurality of (in this example, two) arcs in the circumferential direction, and has an annular shape in which the divided contact surfaces are in close contact with each other.
- the split contact surface is brought into close contact with the tightening bolt 26.
- the sectional shape of the inner peripheral side of the stationary split retainer 3 facing the outer peripheral side of the stationary split ring 4 (12, 13) on the stationary side is roughly the same as the sectional shape of the outer peripheral side of the divided sealing ring 4 (12, 13).
- a groove 27 having a rectangular cross section is formed over the entire circumference at a position corresponding to the vertical stepped portion 21 of the split seal ring 4 (12, 13).
- the vertical step portion 21 and the rectangular groove 27 of the split retainer 3 constitute a fitting hole having a rectangular cross section for fitting a split split ring 32 described later. Further, the inner peripheral side of the divided retainer 3 corresponding to the sloped stepped portion 22 having an obtuse angle of the stationary sealing ring 4 (12, 13) on the stationary side is substantially perpendicular so as to form a substantially triangular gap. Is formed.
- the rotary seal ring 7 has a cross-sectional shape on the outer peripheral side that is symmetric with the stationary seal ring 4, but has a similar shape, and a divided O-ring 29 that seals between the outer peripheral surface of the rotary shaft 5 on the inner peripheral side.
- a groove 30 is provided so that is mounted.
- the rotary seal ring 7, the O ring 29, the backup ring 31, and the rotary ring collar 14 are stably held by the spring 16 and the drive pin 49 that are mounted between the rotary ring collar 14 and the split retainer 6.
- the divided O-ring 29 is also securely held in the groove 30 while being pressed in the axial direction by the backup ring 31.
- the split split ring fitting hole formed by the vertical stepped portion 21 of the split seal rings 4 (12, 13) and 7 (12, 13) and the rectangular groove 27 of the split retainers 3 and 6 is made of stainless steel.
- a split split ring 32 made of steel and having a rectangular cross section and having an arc shape having the same length as the arc length of the split split ring fitting hole is inserted.
- the split split ring 32 is described in detail in Japanese Patent Application No. 2010-511040 (WO2009 / 136539) filed earlier by the present applicant, and detailed description is omitted in this application.
- FIG. 2 shows a state in which the stationary seal ring 4 is cut along a plane orthogonal to the axial direction, and the rotary seal ring 7 has the same shape, and therefore the stationary seal ring 4 will be described as an example.
- a through hole 50 is formed across the two split seal rings 12 and 13 so as to pass through the split contact surfaces 12a and 13a of the two split seal rings 12 and 13 adjacent in the circumferential direction.
- the through hole 50 is located in the vicinity of the center portion 20 in the width direction of the divided sealing rings 12 and 13, and in the radial direction, is slightly outside the center of the thickness in the radial direction. And provided in a direction perpendicular to the divided contact surfaces 12a and 13a.
- FIGS. 2 and 3 (b) when the through hole 50 is provided, each of the divided sealing rings 12 and 13 has a predetermined distance d from the divided contact surfaces 12a and 13a across the divided contact surfaces 12a and 13a.
- Concave portions 51 and 51 extending in a direction perpendicular to the divided contact surfaces 12a and 13a are formed from positions that are separated from each other.
- Flange portions 52 and 52 are formed at positions where the through holes 50 of the split seal rings 12 and 13 are formed by the formation of the recess portions 51 and 51, and the outer surfaces 53 and 53 of the flange portions 52 and 52 are formed.
- a fastening surface of a connecting member 54 described later is formed.
- the through hole 50 is formed in an annular state before the stationary seal ring 4 or the rotary seal ring 7 is divided, and then the divided seal ring is formed, or the stationary seal ring 4 is formed.
- the divided seal rings are combined into an annular shape with high accuracy, and then a through hole 50 is formed. Ring 4 or rotating seal ring 7 can be obtained.
- the connector 54 includes a bolt 55, a nut 56, and a tube 57 made of a cylindrical body that is fitted to the shaft portion 55 a of the bolt 55.
- a centering portion 55c for maintaining the bolt 55 in a substantially centered state with respect to the through hole 50 when the bolt 55 is fitted into the through hole 50.
- a male screw portion 55d is provided on the tip side of the shaft portion 55a.
- the diameter of the centering portion 55c is set to be substantially the same as or slightly smaller than the diameter of the through hole 50.
- a tube 57 is fitted to the shaft portion 55a, and the diameter of the shaft portion 55a is set to be substantially the same as or slightly larger than the inner diameter of the tube 57. Further, the outer diameter of the tube 57 is set smaller than the diameter of the through hole 50.
- the tube 57 is fitted to the shaft portion 55a, the one side surface 57a is abutted against the side surface 55e of the centering portion 55c and positioned.
- the sum of the axial length l1 of the centering portion 55c and the axial length l2 of the tube 57 is set to be larger than the thickness 2d of the flange portions 52 and 52 of the split seal rings 12 and 13. 2d ⁇ l1 + l2 For this reason, as shown in FIG. 4B, when the connecting tool 54 is inserted into the through hole 50 of the flange portions 52, 52 and the two adjacent divided sealing rings 12, 13 are connected by tightening the nut 56. The tube 57 is compressed in the axial direction by the side surface 55e of the centering portion 55c and the inner surface of the nut 56. When the tube 57 is compressed in the axial direction, the tube 57 is expanded in the radial direction.
- the tube 57 since there is no gap on the inner diameter side of the tube 57 and there is a gap on the outer diameter side, the tube 57 does not bulge in the inner diameter direction, and bulges in the outer diameter direction as indicated by an arrow.
- the relationship between the sum of the axial length 11 of the centering portion 55c and the axial length 12 of the tube 57 and the thickness 2d of the flange portions 52 and 52 of the split seal rings 12 and 13 is as described above. It is not limited to a formula, and the tube may be dimensioned so long as the tube is compressed in the axial direction and the tube bulges to the outer diameter side.
- the nut 56 can be provided with a centering part shape to be inserted into the through hole, or the nut outer diameter can be made smaller than the inner diameter of the through hole, and the bolt, tube, and nut can be integrally inserted into the through hole. You may do it.
- the material of the tube 57 is selected from materials having flexibility and a certain degree of corrosion resistance.
- materials having flexibility and a certain degree of corrosion resistance for example, as a synthetic resin, polytetrafluoroethylene (PTFE), perfluoroalkoxy fluororesin (PFA) ), Tetrafluoroethylene / hexafluoropropylene copolymer (FEP), vinyl resin, and urethane resin.
- the metal may be any metal material that can be elastically deformed and has a certain degree of corrosion resistance, and has a helical linear body having a spring function or a cut surface in the longitudinal direction. A cylindrical body is mentioned.
- the diameter of the bolt shaft portion 55a is made slightly larger than the inner diameter of the tube 57, and deformation to the inner diameter side is performed. And can be efficiently deformed to the outer diameter side.
- the material is a deformable metal material
- the parts that come into contact so that the both end faces do not escape to the outer diameter side, that is, the centering portion
- the side surface 55e of 55c and the inner surface of the nut 56 are tapered, or the shape of the spiral linear body is previously formed into a drum shape in which the axial central portion of the bolt swells to the outer diameter side. Is desirable.
- a taper is provided on a part that contacts both end surfaces so as not to escape to the outer diameter side, that is, the side surface 55e of the centering portion 55c and the inner side surface of the nut 56. It is desirable to keep it.
- connection configuration of the split seal rings 12 and 13 constituting the stationary seal ring 4 and the rotary seal ring 7 according to the second embodiment will be described with reference to FIG.
- the connection configuration of the split seal rings 12 and 13 according to the second embodiment is different from the first embodiment in that the nut in the connector is omitted, but the other basic configurations are the same as those of the first embodiment and the same members. Are denoted by the same reference numerals, and redundant description is omitted.
- one flange portion 52 is formed with a through hole 50 over the entire width, and the other flange portion 52 has an inner side in the axial direction.
- the through hole 50 is formed with an internal thread 60 on the outside in the axial direction.
- the bolt 55 is inserted from the side where the through-hole 50 is formed over the entire width, and the male screw portion 55d at the tip of the bolt 55 is screwed with the female screw portion 60 so that the flange portions 52 and 52 can be fastened.
- the connector 54 includes a bolt 55 and a tube 57 made of a cylindrical body that is fitted to the shaft portion 55 a of the bolt 55.
- one end of the tube 57 is in contact with the side surface 55e of the centering portion 55c, and the other end is formed on a stepped portion 61 formed at the boundary between the female screw portion 60 and the through hole 50. Abutted. Therefore, the length of the tube 57 in the axial direction is set larger than the distance between the side surface 55e and the step portion 61 after the bolt 55 is tightened, and the side surface 55e and the step portion 61 cause the axial direction by tightening the bolt 55. And is bulged in the outer diameter direction as indicated by an arrow.
- Example 2 is suitable when the division
- the connector 54 has a function similar to that of a conventionally known metal taper pin in assembling accuracy, and therefore, on the divided contact surfaces of the divided seal rings 12 and 13.
- the assembly accuracy is ensured in the radial direction and the axial direction, but the following effects can be obtained as compared with the tapered pin.
- the tube 57 follows the shape and dimensions of the through hole 50, so accuracy work is not required. Thus, workability is improved.
- the temporarily assembled state of the split seal rings 12 and 13 can be maintained using friction between the outer surface of the tube 57 and the inner surface of the through hole 50, the nut 56 of the connector 54 is fastened.
- the split seal rings 12 and 13 can be stably held during operations such as adjustment of the split contact surfaces of the split seal rings 12 and 13 in a state in which they are not performed.
- (4) In the case of a conventionally known metal taper pin, when an overload is applied to the split seal rings 12 and 13 made of a brittle material during assembly, the split seal rings 12 and 13 are damaged.
- Work stage 1 Temporary assembly
- the divided parts (the retainers 3 and 6 and the divided seal rings 12 and 13) are assembled on the rotating shaft 5, and the divided contact surfaces of the divided seal rings 12 and 13 are in contact with each other, but the fastening of the coupling tool or the like is performed. The member is not completely fastened.
- Work stage 2 Accuracy adjustment of split contact surface 1 The split contact surfaces of the preliminarily assembled split seal rings 12 and 13 are adjusted one by one so that the accuracy of the split contact surfaces is obtained.
- Work stage 5 Fixing the split seal rings 12 and 13 In a state where the divided sealing rings 12 and 13 are stopped from rotating on the retainers 3 and 6, the divided contact surfaces of the divided sealing rings 12 and 13 are connected and fixed by the connecting tool 54.
- Work stage 6 Fixing the rotary seal ring to the rotary shaft The bolt 15 of the collar 14 for a rotary ring is fastened, and the rotary seal ring 7 is fixed to the rotary shaft 5.
- the split retainer 3 is mounted on the outer peripheral side of the stationary seal ring 4 and the split retainer 6 is mounted on the outer peripheral side of the rotary seal ring 7 has been described, but the present invention is not limited to this. Furthermore, the present invention can also be applied to a type in which the outer peripheral side retainers 3 and 6 are not mounted.
- the present invention is not limited to this, and either the stationary seal ring 4 or the rotary seal ring 7 is divided. It may be a thing.
- the through-hole 50 is located near the central portion 20 in the width direction of the divided sealing rings 12 and 13, and in the radial direction, is slightly outside the center of the radial thickness.
- the present invention is not limited to this, and any position where the through hole 50 can be formed may be used.
- the bolt 55 is used as a constituent member of the coupling tool 54.
- the bolt means a mechanical element for fastening and fixing the component and the male screw is cut. It is made up of a shaft part and a head part, and is tightened with a mechanical element called a nut or tightened into a hole (tap) in which a female thread is cut. Include.
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Abstract
Description
この特徴によれば、分割密封環の分割接面における組立ての精度が径方向及び軸方向において確保される。
また、従来公知の金属製のテーパーピンのような当たり確認や、当たり改善作業(摺り合わせ)を削除できるため、加工時間の大幅な短縮を図ることができる。
また、従来公知の金属製のテーパーピンの場合、精度出しの作業が必要であるが、連結具のチューブは貫通孔の形状及び寸法に倣うので、精度出しの作業が不要となり、加工性が改善される。
また、チューブの変形によるチューブの外面と貫通孔の内面との摩擦を利用して分割密封環の仮組み状態を維持することが可能であるため、連結具のナットを締結していない状態における分割密封環の分割接面の調整等の作業時において分割密封環を安定的に保持することができる。すなわち、仮組み作業を容易にすることができる。
また、チューブの変形量をナットのねじ込み量により調整できるため、作業時の状況に合わせて柔軟な対応が可能となる。
また、従来公知の金属製のテーパーピンの場合、組み付け時において、脆性材料からなる分割密封環に過荷重が作用すると分割密封環の破損につながるが、連結具の場合、過荷重が作用してもチューブが緩衝材となり破損に至ることはない。
また、分割密封環の分解時において、従来公知の金属製のテーパーピンの場合、密着しすぎて抵抗が大きいため、最悪の場合取り外しが困難になるが、連結具の場合、チューブが変形するので取り外しが容易である。
この特徴によれば、分割密封環の貫通孔に対する連結具の挿入性や、相反する抵抗が程々によいため、作業性を向上することができる。
この特徴によれば、チューブの内径側への変形を防止し、外径側へ効率よく膨出させることができる。
この特徴によれば、外径方向への膨出が可能なチューブを機械加工により得ることができる。
この特徴によれば、確実に、チューブの内径側への変形を防止し、効率よく外径側へ膨出させることができる。
この特徴によれば、一層、チューブの内径側への変形を防止し、効率よく外径側へ膨出させることができる。
円周方向において隣接する2つの分割密封環の分割接面を通るように、当該2つの分割密封環にわたって形成される貫通孔と、前記2つの分割密封環の貫通孔の一方に形成される雌ねじ部と、前記貫通孔内に挿通され、前記隣接する2つの分割密封環を連結する連結具と、を備え、前記連結具は、ボルト及び前記ボルトの軸部に嵌合されるチューブとから構成され、前記チューブは、前記隣接する2つの分割密封環が前記ボルトの締め付けにより連結される際、前記ボルトと前記雌ねじ部の形成された一方の分割密封環とにより軸方向に圧縮されて外径方向に膨出されるように構成されることを特徴としている。
この特徴によれば、ナットが不要であるため、部品点数を減少させることができ、また、連結具によるフランジ部の締結においてもボルトのねじ込み作業を容易行うことができる。
(1)分割密封環の分割接面における組立ての精度を径方向及び軸方向において確保することができる。
また、従来公知の金属製のテーパーピンのような当たり確認や、当たり改善作業(摺り合わせ)を削除できるため、加工時間の大幅な短縮を図ることができる。
また、従来公知の金属製のテーパーピンの場合、精度出しの作業が必要であるが、連結具のチューブは貫通孔の形状及び寸法に倣うので、精度出しの作業が不要となり、加工性が改善される。
また、チューブの変形によるチューブの外面と貫通孔の内面との摩擦を利用して分割密封環の仮組み状態を維持することが可能であるため、連結具のナットを締結していない状態における分割密封環の分割接面の調整等の作業時において分割密封環を安定的に保持することができる。すなわち、仮組み作業を容易にすることができる。
また、チューブの変形量をナットのねじ込み量により調整できるため、作業時の状況に合わせて柔軟な対応が可能となる。
また、従来公知の金属製のテーパーピンの場合、組み付け時において、脆性材料からなる分割密封環に過荷重が作用すると分割密封環の破損につながるが、連結具の場合、過荷重が作用してもチューブが緩衝材となり破損に至ることはない。
また、分割密封環の分解時において、従来公知の金属製のテーパーピンの場合、密着しすぎて抵抗が大きいため、最悪の場合取り外しが困難になるが、連結具の場合、チューブが変形するので取り外しが容易である。
本実施例1では、アウトサイドメカニカルシールを例にして説明しているが、本発明は、アウトサイドメカニカルシールに限らず、他の形式、例えばインサイドメカニカルシールにも適用できることはいうまでもない。
なお、説明の便宜のため、回転密封環7を構成する分割密封環についても静止密封環4の場合と同じ符号12、13を用いて「7(12,13)」と表記する場合がある。
また、回転密封環7を内嵌保持する分割リテーナ6は、回転軸5に固定された回転環用カラー14を介して回転軸5に固定保持される。すなわち、回転環用カラー14は円周方向において分割されており、締結ボルト15によりリング状に締結されることにより回転軸5に嵌合固定されている。
回転環用カラー14と分割リテーナ6との間には、回転密封環7を静止密封環4に押圧接触させるように右方へと付勢するスプリング16が介装されている。
また、回転密封環7は、例えば、炭化珪素等の硬質材で構成されており、静止密封環4は、例えば、回転密封環7より軟質の自己潤滑性を有するカーボン等で構成されている。
静止密封環4を構成する分割密封環4(12、13)の外周側の断面形状は、幅方向の中央部20が高く、密封端面4aと反対側の側面が垂直形状の段差部21を有し、密封端面4a側の側面が鈍角をなした斜面形状の段差部22を有して両側が低い形状をなしている。垂直形状の段差部21を有する側の低い部分は延伸され、シールケース2との間をシールする分割Oリング23が装着されている。他方、鈍角をなした斜面形状の段差部22を有する低い部分の端部には上記した密封端面4aが形成されている。
静止側の分割密封環4(12、13)の外周側と対向する静止側の分割リテーナ3の内周側の断面形状は、分割密封環4(12、13)の外周側の断面形状に概略添う形状に形成され、分割密封環4(12、13)の垂直形状の段差部21と対応する位置に断面が矩形状の溝27が全周にわたって形成され、分割密封環4(12、13)の垂直形状の段差部21と分割リテーナ3の矩形状の溝27とにより後述する分割スプリットリング32を嵌合するための断面矩形状の嵌合孔を構成している。
また、静止側の分割密封環4(12、13)の鈍角をなした斜面形状の段差部22と対応する分割リテーナ3の内周側は、略3角形状の隙間を形成するように略直角に形成されている。
なお、分割スプリットリング32については、本出願人が先に出願した特願2010-511040号(WO2009/136539号公報)に詳細に説明されており、本出願においては、詳細な説明は省略する。
図2は、静止密封環4を軸方向と直交する面で切断した状態を示しており、回転密封環7についても同様の形状であるため、静止密封環4を例にして説明する。
図4(a)に示すように、連結具54は、ボルト55、ナット56及びボルト55の軸部55aに嵌合される筒状体からなるチューブ57とから構成される。ボルト55の軸部55aの頭部55b寄りには、ボルト55を貫通孔50に嵌入した際、ボルト55が貫通孔50に対してほぼ芯出し状態に維持されるための芯出部55cが設けられ、また、軸部55aの先端側には雄ねじ部55dが設けられている。芯出部55cの径は貫通孔50の径と略同じか、あるいは、僅かに小さく設定される。軸部55aにはチューブ57が嵌合されるものであり、軸部55aの径はチューブ57の内径と略同じか、あるいは、僅かに大きく設定される。さらに、チューブ57の外径は、貫通孔50の径より小さく設定される。チューブ57が軸部55aに嵌合された際、その一側面57aが芯出部55cの側面55eに当接して位置決めされる。
2d<l1+l2
このため、図4(b)に示すように、連結具54がフランジ部52、52の貫通孔50に挿通され、隣接する2つの分割密封環12、13がナット56の締め付けにより連結される際、チューブ57は芯出部55cの側面55eとナット56の内側面とにより軸方向に圧縮される。チューブ57は軸方向に圧縮されると径方向に膨出される。
本例においては、チューブ57の内径側には隙間がなく、外径側には隙間があるため、内径方向に膨出されることなく、矢印で示すように、外径方向に膨出される。
また、芯出し部55cの軸方向長さ11と、チューブ57の軸方向の長さ12との和と、分割密封環12、13のフランジ部52、52の厚さ2dとの関係は上記の式に限定されず、チューブを軸方向に圧縮し、チューブが外径側に膨出する寸法であればよい。例えば、ナット56に貫通孔に挿入される芯出部形状を設けたり、或いは、ナット最大外径を貫通孔の内径寸法よりも小さくし、ボルト、チューブ、ナットを一体にして貫通孔に挿入できるようにしてもよい。
また、金属としては、弾性変形可能で、かつ、ある程度の耐食性を有する金属材料であればよく、形状においては、スプリング機能を有した螺旋状の線状体、または、長手方向に切断面を有する筒状体が挙げられる。
また、材質が変形可能な金属材料である場合は、スプリング機能を有した螺旋状の線状体のものでは、その両端面が外径側へ逃げないように接触する部品、すなわち、芯出部55cの側面55eとナット56の内側面にテーパを設けておくか、あるいは、予め、螺旋状の線状体の形状をボルトの軸方向中央部が外径側に膨らんだ太鼓状に形成するのが望ましい。さらに、長手方向に切断面を有する筒状体のものでは、両端面が外径側へ逃げないように接触する部品、すなわち、芯出部55cの側面55eとナット56の内側面にテーパを設けておくのが望ましい。
実施例2に係る分割密封環12、13の連結構成は、連結具におけるナットを省略している点で実施例1と相違するが、その他の基本構成は実施例1と同じであり、同じ部材には同じ符号を付し、重複する説明は省略する。
ボルト55は貫通孔50が全幅にわたって形成された側から挿入され、ボルト55の先端の雄ねじ部55dが雌ねじ部60と螺合することでフランジ部52、52が締結可能とされている。
図5(a)に示すように、チューブ57は、その一端は芯出部55cの側面55eと当接され、他端は雌ねじ部60と貫通孔50との境界に形成された段部61に当接される。そのため、チューブ57の軸方向の長さは、ボルト55が締め付けられた後の側面55eと段部61と間隔より大きく設定され、ボルト55の締め付けに伴い、側面55eと段部61とにより軸方向に圧縮され、矢印で示すように外径方向に膨出される。チューブ57が外径方向に変形すると、フランジ部52、52の貫通孔50の面にチューブ57の外面が強く圧接する。この結果、分割密封環12、13の分割接面における組立ての精度を、径方向及び軸方向において確保することができる。
なお、実施例2は、分割密封環12、13が金属製の場合に適している。
(1)従来公知の金属製のテーパーピンのような当たり確認や、当たり改善作業(摺り合わせ)を削除できるため、加工下降時間の大幅な短縮を図ることができる。
(2)従来公知の金属製のテーパーピンの場合、精度出しの作業が必要であるが、連結具54の場合、チューブ57は貫通孔50の形状及び寸法に倣うので、精度出しの作業が不要となり、加工性が改善される。
(3)チューブ57の変形による外面と貫通孔50の内面との摩擦を利用して分割密封環12、13の仮組み状態を維持することが可能であるため、連結具54のナット56を締結していない状態における分割密封環12、13の分割接面の調整等の作業時において分割密封環12、13を安定的に保持することができる。
(4)従来公知の金属製のテーパーピンの場合、組み付け時において、脆性材料からなる分割密封環12、13に過荷重が作用すると分割密封環12、13の破損につながるが、連結具54の場合、過荷重が作用してもチューブ57が緩衝材となり破損に至ることはない。
(5)分割密封環12、13の分解時において、従来公知の金属製のテーパーピンの場合、密着しすぎて抵抗が大きいため、最悪の場合取り外しが困難になるが、連結具54の場合、チューブ57が変形するので取り外しが容易である。
(6)チューブ57が合成樹脂製の場合、分割密封環の貫通孔に対する連結具の挿入性や、相反する抵抗が程々によいため、作業性を向上することができる。
作業段階1:仮組み
分割されている部品(リテーナ3、6及び分割密封環12、13)を回転軸5上で組み立てるもので、分割密封環12、13の分割接面は接触されているが、連結具等の締結部材で完全には締結されていない状態にある。
作業段階2:分割接面の精度調整1
仮組みされた分割密封環12、13の分割接面を片方ずつ調整して分割接面の精度を出すもので、作業後は分割接面は密接に接触しており、分割接面の合わせ精度は出ているが、連結具等の締結部材で完全には締結されていない状態にある。
作業段階3:リテーナ仮組み
分割密封環12、13の外周側のリテーナ3、6を締結するもので、リテーナ3、6のボルトを締結する。
作業段階4:分割接面の精度調整2
分割密封環12、13をリテーナ3、6に仮組みした後、これらの軸方向の長さが取り付け長さになるまで、図示しないセット治具を用いて軸方向に押し込むもので、軸方向の精度を出すものである。
作業段階5:分割密封環12、13の固定
リテーナ3、6に分割密封環12、13を回転止めした状態において、分割密封環12、13の分割接面を連結具54にて連結・固定する。
作業段階6:回転密封環の回転軸への固定
回転環用カラー14のボルト15を締結するもので、回転密封環7が回転軸5に固定される。
2 シールケース
3 分割リテーナ
4 静止密封環
5 回転軸
6 分割リテーナ
7 回転密封環
8 スプリング
9 Oリング
12 分割密封環
12a 分割接面
13 分割密封環
13a 分割接面
14 回転環用カラー
15 締結ボルト
16 スプリング
20 分割密封環の幅方向の中央部
21 分割密封環の垂直形状の段差部
22 分割密封環の斜面形状の段差部
23 分割Oリング
26 締付けボルト
27 分割リテーナの矩形状の溝
29 分割Oリング
30 溝
31 バックアップリング
32 分割スプリットリング
36 緩衝材
50 貫通孔
51 凹部
52 フランジ部
53 フランジ部の外側面
54 連結具
55 ボルト
56 ナット
57 チューブ
60 雌ねじ部
61 段部
Claims (7)
- ハウジング側に設けられた静止密封環またはハウジング内に挿通された回転軸に設けられた回転密封環を円周方向において分割された分割密封環となし、前記静止密封環と前記回転密封環との対向端面である密封端面によりシールするように構成された分割型メカニカルシールにおいて、
円周方向において隣接する2つの分割密封環の分割接面を通るように当該2つの分割密封環にわたって形成される貫通孔と、
前記貫通孔内に挿通され、前記隣接する2つの分割密封環を連結する連結具と、を備え、
前記連結具は、ボルト、ナット及び前記ボルトの軸部に嵌合されるチューブとから構成され、
前記チューブは、前記隣接する2つの分割密封環が前記ナットの締め付けにより連結される際、軸方向に圧縮されて外径方向に膨出されるように構成されることを特徴とする分割型メカニカルシール。 - 前記チューブは、合成樹脂製の筒状体であることを特徴とする請求項1に記載の分割型メカニカルシール。
- 前記チューブの内径より前記ボルトの軸部の外径が大きく設定されていることを特徴とする請求項2に記載の分割型メカニカルシール。
- 前記チューブは、変形可能な金属製であって、螺旋状の線状体、または、長手方向に切断面を有する筒状体であることを特徴とする請求項1に記載の分割型メカニカルシール。
- 前記チューブは、予め、軸方向の中央付近で外径方向に容易に膨出可能な形状に形成されていることを特徴とする請求項4に記載の分割型メカニカルシール。
- 前記チューブは、軸方向の中央付近で外径方向に容易に膨出可能なように両端においてテーパ面で支持されていることを特徴とする請求項4又は5に記載の分割型メカニカルシール。
- ハウジング側に設けられた静止密封環またはハウジング内に挿通された回転軸に設けられた回転密封環を円周方向において分割された分割密封環となし、前記静止密封環と前記回転密封環との対向端面である密封端面によりシールするように構成された分割型メカニカルシールにおいて、
円周方向において隣接する2つの分割密封環の分割接面を通るように、当該2つの分割密封環にわたって形成される貫通孔と、前記2つの分割密封環の貫通孔の一方に形成される雌ねじ部と、
前記貫通孔内に挿通され、前記隣接する2つの分割密封環を連結する連結具と、を備え、
前記連結具は、ボルト及び前記ボルトの軸部に嵌合されるチューブとから構成され、
前記チューブは、前記隣接する2つの分割密封環が前記ボルトの締め付けにより連結される際、前記ボルトと前記雌ねじ部の形成された一方の分割密封環とにより軸方向に圧縮されて外径方向に膨出されるように構成されることを特徴とする分割型メカニカルシール。
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EP14861492.8A EP3070378B1 (en) | 2013-11-12 | 2014-10-16 | Divided mechanical seal |
CN201480045514.7A CN105473912B (zh) | 2013-11-12 | 2014-10-16 | 分割型机械密封件 |
US14/912,041 US10077843B2 (en) | 2013-11-12 | 2014-10-16 | Division type mechanical seal |
JP2015547699A JP6385360B2 (ja) | 2013-11-12 | 2014-10-16 | 分割型メカニカルシール |
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EP (1) | EP3070378B1 (ja) |
JP (1) | JP6385360B2 (ja) |
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JP6385360B2 (ja) | 2018-09-05 |
CN105473912B (zh) | 2019-03-22 |
CN105473912A (zh) | 2016-04-06 |
US20160327161A1 (en) | 2016-11-10 |
US10077843B2 (en) | 2018-09-18 |
EP3070378A4 (en) | 2017-07-05 |
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