WO2016047352A1 - メカニカルシール - Google Patents
メカニカルシール Download PDFInfo
- Publication number
- WO2016047352A1 WO2016047352A1 PCT/JP2015/074058 JP2015074058W WO2016047352A1 WO 2016047352 A1 WO2016047352 A1 WO 2016047352A1 JP 2015074058 W JP2015074058 W JP 2015074058W WO 2016047352 A1 WO2016047352 A1 WO 2016047352A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sliding ring
- sleeve
- side sliding
- rotation
- cup gasket
- Prior art date
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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
- F16J15/34—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
- F16J15/348—Pre-assembled seals, e.g. cartridge seals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-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
- 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
-
- 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
- F16J15/36—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member connected by a diaphragm or bellow to the other member
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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
- F16J15/38—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member sealed by a packing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
Definitions
- the present invention relates to a mechanical seal used as a shaft seal device such as a pump.
- FIG. 4 (a) an inside type that seals the sealed fluid on the high-pressure fluid side that tends to leak from the outer periphery of the sliding surface toward the inner periphery.
- the annular shaft provided on the rotating shaft 50 side for driving the pump impeller (not shown) on the high-pressure fluid side is rotatably provided integrally with the rotating shaft 50 via the sleeve 51 and the cup gasket 52.
- the rotation-side sliding ring 53 and an annular fixed-side sliding ring 55 provided via a bellows 57 in the cartridge 56 in a non-rotating state and axially movable in the pump housing 54 are fixed.
- the cup gasket 52 in the mechanical seal of the prior art 1 is formed of an elastic material such as rubber and has a substantially cross-sectional shape. It is L-shaped.
- a cup gasket 59 mounted between the sleeve 51 and the rotating side sliding ring 53 is as shown in FIG.
- a cup gasket 59 mounted between the sleeve 51 and the rotating side sliding ring 53 is as shown in FIG.
- there is known one having a substantially I-shaped cross section that does not extend to the back surface of the rotation-side sliding ring 53 and the radial direction portion of the sleeve 51 hereinafter referred to as “Prior Art 2”, for example, Patent Document 1). 2 and 3).
- the thickness of the radial portion 52a of the cup gasket 52 is larger than the gap t between the seal portions in the axial direction of the sleeve 51 and the rotation-side sliding ring 53.
- the thickness is set to be thick, even if radial pressure acts on the cup gasket 52 from the outer peripheral side as shown by an arrow, it is conceivable that the radial portion 52a is difficult to come off due to the gap t. There arises a problem that the axial dimension of the rotation-side sliding ring 53 itself increases.
- the cup gasket 59 since the seal portion A by the cup gasket 59 is located in the axial direction portion of the sleeve 51 and the cup gasket 59, the cup gasket 59 has a low pressure fluid from the high pressure fluid side as indicated by an arrow.
- the pressure in the axial direction toward the side (atmosphere side) acts, and the back pressure acting on the back surface of the rotation-side sliding ring 53 increases, and the clamping force with respect to the cup gasket 59 decreases.
- the rotating side sliding ring 53 and the cup gasket 59 move to the fixed side sliding ring 55, and the sliding on the sliding surface S becomes unstable, resulting in fluid leakage. The problem of causing arises.
- the present invention was made to solve the problems of the prior art, and without rotating the heat dissipation against sliding heat generation and without increasing the axial dimension, the sleeve on the rotating shaft side and the rotating
- An object of the present invention is to provide a mechanical seal that prevents the cup gasket attached between the side sliding ring from coming off to the low pressure fluid side.
- a mechanical seal of the present invention first comprises a sleeve fixed to a rotating shaft and a cartridge fixed to a housing, and the sleeve is provided with a rotating side sliding ring via a cup gasket.
- the cartridge is provided with a fixed-side slide ring that slides facing the rotation-side slide ring, and an outer diameter of a sliding surface between the rotation-side slide ring and the fixed-side slide ring
- the rotating side sliding ring is formed in a substantially pentagonal cross section having a cut portion in which a corner portion on the back surface side is cut into a tapered shape on the inner diameter side.
- the cup gasket is mounted across the inner diameter side and the back surface side of the rotation side sliding ring, and the axial side portion and the rotation side contacting the inner diameter side of the rotation side sliding ring and the inner cylinder portion of the sleeve Back of sliding ring
- the cup and the cup gasket are formed with a substantially L-shaped cross section including a side and a radial portion in contact with the radial portion of the sleeve, and a corner portion facing the cut portion is formed along the cut portion.
- the thickness t of the corner portion is set to be larger than the gap d between the inner diameter side of the rotary sliding ring and the inner cylindrical portion of the sleeve.
- the heat dissipation against sliding heat generation is not reduced, and the thickness of the radial portion of the cup gasket is set to be thick Compared to the above, the dimension in the axial direction is not increased, and the cup gasket can be prevented from coming off to the low pressure fluid side.
- the rotation-side sliding ring is formed in a pentagonal cross section having a cut portion in which the corner portion on the inner diameter side and the back side is cut into a taper shape, so that the rotation can be performed without affecting the sealing performance.
- the side sliding ring can be reduced in weight.
- the cup gasket has a substantially L-shaped cross section composed of an axial portion and a radial portion, the axial force in the direction of the anti-sliding surface of the rotating side sliding ring is kept constant. It is possible to securely pinch the radial portion of the cup gasket, which can contribute to preventing the cup gasket from coming off to the low pressure fluid side. Also, since the thickness of the corner portion of the cup gasket is set larger than the clearance between the inner diameter side of the rotating sliding ring and the inner cylindrical portion of the sleeve, the cup gasket is physically prevented from coming out to the low pressure fluid side. be able to. In addition, even if the axial direction portion of the cup gasket is damaged, the cup gasket does not come out to the low pressure fluid side, so that the sealing performance can be maintained.
- the mechanical seal of the present invention secondly includes a sleeve fixed to the rotating shaft and a cartridge fixed to the housing, and the sleeve is provided with a rotating side sliding ring via a cup gasket,
- the cartridge is provided with a fixed-side slide ring that slides facing the rotation-side slide ring, and a high-pressure fluid is provided on the outer diameter side of the sliding surface between the rotation-side slide ring and the fixed-side slide ring.
- the rotating side sliding ring is formed in a substantially hexagonal cross section having a cut portion that is cut into an inner diameter side and a corner portion on the back side is recessed inwardly.
- the cup gasket is mounted across the inner diameter side and the back surface side of the rotation side sliding ring, and the axial side portion and the rotation side contacting the inner diameter side of the rotation side sliding ring and the inner cylinder portion of the sleeve Back side of sliding ring and A cross section formed of a radial portion in contact with a radial portion of the sleeve is formed in a substantially L shape, and a corner portion facing the cut portion is formed in a shape along the cut portion.
- the thickness t of the portion is set to be larger than the gap d between the inner diameter side of the rotation side sliding ring and the inner cylindrical portion of the sleeve.
- the mechanical seal of the present invention includes a sleeve fixed to the rotation shaft and a cartridge fixed to the housing, and the sleeve is provided with a rotation-side sliding ring via a cup gasket,
- the cartridge is provided with a fixed-side slide ring that slides facing the rotation-side slide ring, and a high-pressure cover is provided on the inner diameter side of the sliding surface between the rotation-side slide ring and the fixed-side slide ring.
- the rotation-side sliding ring has a pentagonal cross section having a cut portion in which the corner portion on the outer diameter side and the back side is cut into a tapered shape
- the cup gasket is mounted across the back side of the rotating side sliding ring and the outer cylindrical portion of the sleeve, and has the rotation part.
- Side sliding ring A cross section formed of a radial side and an axial portion in contact with the outer cylindrical portion of the sleeve, a back surface side of the rotating side sliding ring, and a radial direction portion in contact with the outer cylindrical portion of the sleeve is formed in a substantially L shape.
- the corner portion facing the cut portion is formed in a shape along the cut portion, and the thickness t of the corner portion of the cup gasket is a gap d between the back side of the rotating side sliding ring and the radial portion of the sleeve. It is characterized by being set larger. According to this feature, an outside-type mechanical seal having the effects of the first feature or the second feature can be obtained.
- the present invention has the following excellent effects. (1) Compared to the case where a cup gasket is provided on the high-pressure fluid side of the rotating side sliding ring, the heat dissipation against sliding heat generation is not reduced, and the shaft thickness is larger than the case where the radial thickness of the cup gasket is set thick. It is possible to prevent the cup gasket from coming off to the low pressure fluid side without increasing the dimension in the direction. (2) Further, since the rotation side sliding ring is formed in a pentagonal cross section having a cut portion in which the corner portion on the inner diameter side and on the opposite side of the sliding surface is cut into a taper shape, the sealing performance is improved. The rotating side sliding ring can be reduced in weight without affecting it.
- the cup gasket has a substantially L-shaped cross section composed of an axial portion and a radial portion, the axial force in the anti-sliding surface direction of the rotating side sliding ring is constant.
- the cup gasket can be securely clamped in the radial direction, which contributes to preventing the cup gasket from coming out to the low pressure fluid side.
- the thickness of the corner of the cup gasket is set to be larger than the clearance between the inner diameter side of the rotating sliding ring and the inner cylinder of the sleeve, the cup gasket is physically prevented from coming out to the low pressure fluid side. Can be prevented.
- the rotation-side sliding ring is formed in a substantially hexagonal cross section having a cut portion that is cut in a shape in which the corner portion on the inner diameter side and the opposite side of the sliding surface is recessed inward, the cup Since there is a merit that it is easy to increase the maximum thickness of the corner portion of the gasket, it is possible to further prevent the cup gasket from coming out to the low pressure fluid side.
- Example 1 of this invention With reference to FIG. 1, the mechanical seal which concerns on Example 1 of this invention is demonstrated.
- the present invention is applicable to either an inside type or an outside type mechanical seal.
- Examples 1 to 3 a fluid that leaks from the outer periphery of the sliding surface toward the inner periphery.
- the inside mechanical seal which is the form which seals is shown.
- the left side of FIG. 1 is the high pressure fluid side (sealed fluid side), and the right side is the low pressure fluid side (atmosphere side).
- the mechanical seal includes a sleeve 2 fixed to the rotary shaft 1 and a cartridge 4 fixed to the housing 3, and the sleeve 2 is provided with a rotation-side sliding ring 5 via a cup gasket 7.
- the cartridge 4 is provided with a fixed-side slide ring 6 that slides facing the rotation-side slide ring 5, and the outer diameter of the sliding surface S between the rotation-side slide ring 5 and the fixed-side slide ring 6. It is an inside type mechanical seal with high pressure fluid on the side.
- the sleeve 2 includes an inner cylinder portion 2a, a radial direction portion 2b, and an outer cylinder portion 2c.
- the sleeve 2 has a substantially U-shaped cross section, and is disposed so that the opening portion faces the cartridge 4 side. 5 is attached. Further, the cartridge 4 also has a substantially U-shaped cross section, and is disposed so that the opening faces the sleeve 2 side, and the fixed side sliding ring 6 is mounted inside.
- the fixed-side sliding ring 6 fixed to the pump housing 3 is fitted into the cartridge 4 together with the bellows 8, the case 9, the driving band 10, and the coiled wave spring 11.
- a driving band 10 and a case 9 are mounted on the outer peripheral side of the bellows 8, and the fixed-side sliding ring 6 is fixed to the inner cylinder portion 4 a of the cartridge 4.
- the bellows 8 mounted between the driving band 10 and the inner cylindrical portion 4a of the cartridge 4 has an appropriate tightening allowance to ensure sealing performance and fixing force.
- the rotation-side sliding ring 5 has a cut portion 5a in which a corner portion on the inner diameter side opposite to the sliding surface S (in the present specification, sometimes referred to as “back side”) is cut into a tapered shape. It has a substantially pentagonal cross section. Note that a substantially pentagonal cross section means that chamfering and the like may be performed at three corners other than the two corners at both ends of the cut portion 5a. This means that the basic shape is a pentagon.
- the rotation-side sliding ring 5 is press-fitted and fixed to the sleeve 2 via the cup gasket 7 on the inner shape side and the back side.
- At least two notch portions 5b are provided on the outer peripheral portion of the rotation-side sliding ring 5 so as to face each other. Further, the rotation is stopped by a claw-like portion provided on the outer cylinder portion 2c of the sleeve 2.
- the cup gasket 7 is mounted across the inner diameter side and the rear surface side of the rotation side sliding ring 5, and the axial direction portion 7 a that contacts the inner diameter side of the rotation side sliding ring 5 and the inner cylinder portion 2 a of the sleeve 2 and the rotation.
- a cross section composed of a back surface side of the side sliding ring 5 and a radial portion 7b in contact with the radial portion 2b of the sleeve 2 is formed in a substantially L shape.
- the axial portion 7 a has a length that is in contact with substantially the entire inner surface of the rotation-side sliding ring 5.
- the outermost diameter of the radial portion 7b and the inner pressure receiving inner diameter of the bellows 8 are the same in the radial direction, or the outermost diameter of the radial portion 7b is the pressure receiving pressure of the bellows. It may be provided on the higher pressure side than the innermost diameter.
- the stationary-side sliding ring 6 is pressed against the rotating-side sliding ring 5, and the sliding surface does not open.
- the radial portion 7b is provided on the higher pressure side than the pressure receiving inner diameter of the bellows, the force applied to the back surface of the rotating ring by the fluid pressure becomes weaker than in the case where the pressure receiving inner diameter of the radial portion 7b and the bellows is the same in the radial direction. There is no fear that the sliding surface will open more.
- a part of the radial seal portion B at a position close to the high-pressure fluid side of the radial portion 7b of the cup gasket 7 is more axial than the axial interval between the rotation side sliding ring 5 and the radial portion 2b of the sleeve 2.
- the high-pressure fluid may be structured so as not to leak to the inner diameter side, and the axial seal portion C of the rotary-side sliding ring at a position close to the low-pressure fluid side of the axial direction portion 7a of the cup gasket 7 It is possible to make the structure larger in the radial direction than the radial interval between the sliding ring 5 and the axial portion 2a of the sleeve 2 so that even if the high pressure fluid leaks, it does not leak to the low pressure fluid side.
- the inner surface of the corner portion 7c facing the cut portion 5a of the rotation side sliding ring 5 of the cup gasket 7 is formed in a tapered shape along the cut portion 5a, and the outer surface of the corner portion 7c is along the outer surface of the sleeve 2.
- the corner portion 7c of the cup gasket 7 is formed with a substantially right angle (the corner portion is R-processed), and the thickness t of the corner portion 7c of the cup gasket 7 and the inner cylindrical portion 2a of the sleeve 2 are the same. It is set larger than the gap d.
- the pressure of the high-pressure fluid acting on the rotation-side sliding ring 5 and the cup gasket 7 will be described with reference to FIG.
- the high-pressure fluid is naturally sealed by the sliding surface S as indicated by the broken line, but the radial seal portion B at a position close to the high-pressure fluid side of the radial portion 7b of the cup gasket 7 is also sealed ( Secondary seal).
- the rotation side sliding ring 5 and the cup gasket 7 receive a pressure as shown by an arrow by a high pressure fluid.
- the radial force Fk applied to the rotation-side sliding ring 5 works to shrink the rotation-side sliding ring 5 to the inner diameter side, but the rigidity of the rotation-side sliding ring 5 is high, so that it can be ignored.
- the cup gasket 7 is not affected by the radial force from the rotation-side sliding ring 5.
- the side sliding ring 5 is sandwiched between the sleeve 2 and the rotating side sliding ring 5 with the axial force Fj in the direction opposite to the sliding surface S and the reaction force from the sleeve 2.
- the cup gasket 7 is made of an elastic body, and the elastic body is deformed by the applied force, and the resistance force due to the friction of the contact portion is increased by the amount of deformation, but the deformation amount of the cup gasket 7 depends on Fj.
- the resistance force that opposes the removal of the gasket 7 depends on the axial force Fj.
- the axial force Fj in the direction opposite to the sliding surface S acting on the rotation side sliding ring 5 is F1 which receives the force received from the fixed side sliding ring 6 and F2 which is the axial force in the direction opposite to the sliding surface S received from the high pressure fluid.
- F3 varies depending on the radial position of the radial seal portion B.
- the radial position of the radial seal portion B depends on the length of the radial portion 7b of the cup gasket 7, and the longer the length (the back side of the rotating side sliding ring 5 is covered by the radial portion 7b).
- F3 can be made smaller and the result can be made larger Fj.
- the axial force Fj in the anti-sliding surface direction of the rotation-side sliding ring 5 is held at a constant magnitude to securely hold the radial portion 7b of the cup gasket 7, and the corner portion of the cup gasket 7 is secured.
- the thickness t of 7c is larger than the gap d between the inner diameter side of the rotary sliding ring 5 and the inner cylindrical portion 2a of the sleeve 2, the force in the direction in which the cup gasket 7 is pulled out from the high pressure fluid to the low pressure fluid side Even when receiving, it is characterized in that it is difficult to come off physically.
- the effects of the present embodiment are as follows. (1) Compared to the case where a cup gasket is provided on the high-pressure fluid side of the rotating-side sliding ring 5 as shown in FIG. 4B, the heat dissipation against sliding heat generation is not lowered, and at the same time, FIG. Compared with the case where the thickness of the radial portion of the cup gasket is set to be thick, the axial dimension is not enlarged, and the cup gasket can be prevented from coming off to the low pressure fluid side. (2) Since the rotation-side sliding ring 5 is formed in a pentagonal section having a cut portion 5a which is an inner diameter side and is opposite to the sliding surface S and has a cut portion 5a, the sealing performance.
- the rotating side sliding ring 5 can be reduced in weight without affecting the above.
- the cup gasket 7 has a substantially L-shaped cross section including the axial direction portion 7a and the radial direction portion 7b, the axial force Fj in the anti-sliding surface direction of the rotation side sliding ring 5 is obtained.
- the cup gasket 7 can be held at a constant size, and the radial portion 7b of the cup gasket 7 can be securely clamped, contributing to prevention of the cup gasket from coming out to the low pressure fluid side.
- the thickness t of the corner portion 7c of the cup gasket 7 is set to be larger than the gap d between the inner diameter side of the rotary sliding ring 5 and the inner cylindrical portion 2a of the sleeve 2, the cup gasket has a low pressure fluid side. Can be physically prevented. (5) Even if the axial portion 7a of the cup gasket 7 is damaged, the cup gasket does not come out to the low-pressure fluid side, so that the sealing performance can be maintained with the radial portion 7b.
- Example 2 of this invention has a cut portion that is cut into a shape in which the corner portion on the inner diameter side of the rotation side sliding ring 5 and the back side is recessed inward, is shown in FIG.
- FIG. 2 Although different from Example 1, other configurations are the same as those of Example 1, the same members are denoted by the same reference numerals, and redundant description is omitted.
- the rotation-side sliding ring 15 is formed in a substantially hexagonal cross section having a cut portion 15 a that is cut into a shape in which the corner portion on the inner diameter side and the back side is recessed inward.
- the cut portion 15 a is recessed in a square shape, but is not limited thereto, and may be an arc-shaped recess or a curved recess.
- the cut portion 15a is a recess having an arc shape or the like, the recess does not strictly form a corner, but the midpoint of the recess is regarded as one corner and is a hexagon.
- chamfering may be performed at three corners other than the two corners at both ends of the cut portion 15a. This means that the basic shape is a hexagon.
- the cup gasket 17 is mounted across the inner diameter side and the rear side of the rotation side sliding ring 15, and the axial direction portion 17 a that contacts the rotation side sliding ring 15 and the inner cylindrical portion 2 a of the sleeve 2 and the rotation side sliding.
- the cross section formed of the ring 15 and the radial portion 17b in contact with the radial portion 2b of the sleeve 2 is formed in a substantially L shape, and the corner portion 17c facing the cut portion 15a of the rotation side sliding ring 15 is a cut portion.
- the corner portion 17c of the cup gasket 17 has a thickness t set to be larger than the gap d between the inner diameter side of the rotation side sliding ring 15 and the inner cylindrical portion 2a of the sleeve 2.
- the same effect as in the first embodiment is obtained, but since there is a merit that the maximum thickness t of the corner portion 17c of the cup gasket 17 is easily increased, the cup gasket is moved to the low pressure fluid side. Can be further prevented.
- Example 3 shown in FIG. 3 is an outside type mechanical seal in which a high-pressure sealed fluid exists on the inner diameter side of the sliding surface of the rotating side sliding ring and the stationary side sliding ring.
- Example 1 other configurations are the same as those of Example 1, the same members are denoted by the same reference numerals, and redundant description is omitted.
- the mechanical seal shown in FIG. 3 is an outside-type mechanical seal in which a high-pressure sealed fluid exists on the inner diameter side of the sliding surface S between the rotation-side sliding ring 5 and the stationary-side sliding ring 6.
- the left side of FIG. 3 is the low pressure fluid side (atmosphere side), and the right side is the high pressure fluid side (sealed fluid side).
- the sleeve 22 includes an inner cylindrical portion 22a, a radial direction portion 22b, and an outer cylindrical portion 22c.
- the sleeve 22 has a substantially U-shaped cross section, and is disposed so that the opening portion faces the cartridge 4 side. 25 is attached.
- the rotation-side sliding ring 25 is formed in a pentagonal cross section having a cut portion 25a which is an outer diameter side and a corner portion on the back side is cut into a taper shape.
- the cup gasket 27 is mounted across the outer diameter side and the back surface side of the rotation side sliding ring 25, and the axial part 27 a that contacts the outer diameter side of the rotation side sliding ring 25 and the outer cylinder part 22 c of the sleeve 22 and the rotation.
- the cross section formed by the back surface side of the side sliding ring 25 and the radial direction portion 27b in contact with the radial direction portion 22b of the sleeve 22 is formed in a substantially L shape, and the corner portion 27c facing the cut portion 25a is the cut portion 25a. It is formed in the shape along. Further, the thickness t of the corner portion 27 c of the cup gasket 27 is set to be larger than the gap d between the outer diameter side of the rotation side sliding ring 25 and the outer cylindrical portion 22 c of the sleeve 22.
- FIG. 3 shows a case where the mechanical seal of the first embodiment is applied to an outside-type mechanical seal, but the present invention is not limited to this, and can be applied to the mechanical seal of the second embodiment.
- the rotation-side sliding ring 25 is formed in a pentagonal cross section having a cut portion 25a which is the outer diameter side and the anti-sliding surface S side corner portion is cut into a taper shape, the sealing performance is improved.
- the rotation-side sliding ring 25 can be reduced in weight without influencing.
- the cup gasket 27 has a substantially L-shaped cross section including the axial direction portion 27a and the radial direction portion 27b, the axial force Fj in the anti-sliding surface direction of the rotation side sliding ring 25 is provided.
- the cup gasket 27 can be held at a constant size, and the radial portion 27b of the cup gasket 27 can be securely clamped, thereby contributing to prevention of the cup gasket from coming out to the low pressure fluid side.
- the thickness t of the corner portion 27c of the cup gasket 27 is set to be larger than the gap d between the outer diameter side of the rotation side sliding ring 25 and the inner cylindrical portion 22a of the sleeve 22, the low pressure fluid of the cup gasket It is possible to physically prevent the side from coming off. (5) Even if the axial portion 27a of the cup gasket 27 is damaged, the cup gasket does not come out to the low-pressure fluid side, so that the sealing performance can be maintained with the radial portion 27b.
- the mechanical seal of the present invention is applied to a pump.
- the present invention is not limited thereto, and can be applied to various industrial machines such as a compressor and a submersible motor.
- the rotation-side sliding ring 5 has a cut portion 5a cut into a taper shape.
- the “cut portion cut into a taper shape” includes a normal machine. It does not include chamfering of corners that is performed during processing. That is, it means a case where it is cut larger than the chamfer.
- the sleeve 2 includes an inner cylindrical portion 2a, a radial direction portion 2b, and an outer cylindrical portion 2c, has a substantially U-shaped cross section, and is a claw shape provided on the outer cylindrical portion 2c.
- the outer cylinder portion 2c is not continuous in the circumferential direction but includes only a pawl-shaped portion.
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- Gasket Seals (AREA)
Abstract
Description
この問題の第1の対策としては、図4(b)に示すように、回転側摺動環53の高圧流体側(外周側)にカップガスケット52を装着し、軸方向シール部A1でシールすることにより、半径方向の圧力の影響を小さくする手法があるが、摺動面Sの摺動発熱の放熱性が低下するという問題が生じる。
また、第2の対策としては、図4(c)に示すように、スリーブ51と回転側摺動環53の軸方向のシール部の隙間tに比べ、カップガスケット52の径方向部52aの肉厚を厚く設定し、カップガスケット52には矢印で示すように外周側から径方向の圧力が作用しても、径方向部52aが隙間tに引っ係ることにより抜けにくくすることが考えられるが、回転側摺動環53自体の軸方向寸法が大きくなるという問題が生じる。
この特徴によれば、回転側摺動環の高圧流体側にカップガスケットを設ける場合に比べ摺動発熱に対する放熱性を低下させることがなく、カップガスケットの径方向部の肉厚を厚く設定した場合に比べ軸方向の寸法を拡大させることがなく、カップガスケットの低圧流体側への抜け防止を図ることができる。
また、回転側摺動環は、内径側であって背面側のコーナー部がテーパ状にカットされたカット部を有する断面5角形に形成されているため、シール性能に影響を与えることなく、回転側摺動環を軽量化できる。
また、カップガスケットは、軸方向部及び径方向部とからなる断面が略L字形状に形成されているため、回転側摺動環の反摺動面方向の軸力を一定の大きさに保持でき、カップガスケットの径方向部を確実に挟着することができ、カップガスケットの低圧流体側への抜け防止に貢献できる。
また、カップガスケットのコーナー部の厚さは回転側摺動環の内径側とスリーブの内筒部の隙間より大きく設定されているため、カップガスケットの低圧流体側への抜けを物理的に防止することができる。
また、万一、カップガスケットの軸方向部が破損した場合でも、カップガスケットが低圧流体側へ抜けることがないため、シール性を維持できる。
この特徴によれば、上記第1の特徴の有する効果に加えて、カップガスケットのコーナー部の最大の厚さを大きくしやすいというメリットがあるため、カップガスケットの低圧流体側への抜けを一層防止することができる。
この特徴によれば、上記第1の特徴または上記第2の特徴の有する効果を備えたアウトサイド形のメカニカルシールを得ることができる。
(1)回転側摺動環の高圧流体側にカップガスケットを設ける場合に比べ摺動発熱に対する放熱性を低下させることがなく、カップガスケットの径方向部の肉厚を厚く設定した場合に比べ軸方向の寸法を拡大させることがなく、カップガスケットの低圧流体側への抜け防止を図ることができる。
(2)また、回転側摺動環は、内径側であって摺動面の反対側のコーナー部がテーパ状にカットされたカット部を有する断面5角形に形成されているため、シール性能に影響を与えることなく、回転側摺動環を軽量化できる。
(3)また、カップガスケットは、軸方向部及び径方向部とからなる断面が略L字形状に形成されているため、回転側摺動環の反摺動面方向の軸力を一定の大きさに保持でき、カップガスケットの径方向部を確実に挟着することができ、カップガスケットの低圧流体側への抜け防止に貢献できる。
(4)また、カップガスケットのコーナー部の厚さは回転側摺動環の内径側とスリーブの内筒部の隙間より大きく設定されているため、カップガスケットの低圧流体側への抜けを物理的に防止することができる。
なお、本発明は、インサイド形及びアウトサイド形のいずれのメカニカルシールに適用されるものであるが、実施例1~3では、摺動面の外周から内周方向へ向かって漏れようとする流体をシールする形式であるインサイドのメカニカルシールを示す。図1の左側が高圧流体側(被密封流体側)、右側が低圧流体側(大気側)である。
スリーブ2は、内筒部2a、径方向部2b及び外筒部2cからなり、断面略コ字状をなし、カートリッジ4側に開口部が向くように配設され、内部に回転側摺動環5が装着されるようになっている。
また、カートリッジ4も断面略コ字状をなし、スリーブ2側に開口部が向くように配設され、内部に固定側摺動環6が装着されるようになっている。
なお、断面略5角形とは、カット部5aの両端の2つの角部以外の3つの角部において面取りなどが施されることがあるため、厳密な意味では5角形ではないが、面取りを無視した場合の基本的形状が5角形であるという意味である。
回転側摺動環5は、内形側及び背面側にカップガスケット7を介してスリーブ2に圧入固定される。回転側摺動環5とスリーブ2との廻り止めの方式は種々あるが、本例では回転側摺動環5の外周部に少なくとも2ヵ所以上の切り欠き部分5bを設け、これに相対するようにスリーブ2の外筒部2cに設けたつめ状の部分で廻り止めしたものである。
また、径方向部7bの最外径とベローズ8の受圧最内径(ベローズにおいて高圧流体の圧力を受ける最も内側の径)が径方向において同じ或いは、径方向部7bの最外径がベローズの受圧最内径よりも高圧側に設けられるとよい。これは、ベローズ受圧最内径と径方向部7bの最外径が径方向において同じ場合、流体圧力により、固定側摺動環からみてベローズの背面と、回転環の背面にかかる軸方向に押す力がつり合い、また、ベローズ背面には更にコイルドウェーブスプリング11の力が加わるため、固定側摺動環6が回転側摺動環5に押し付けられ、摺動面が開くことが無い。また、径方向部7bがベローズの受圧内径よりも高圧側に設けられると、径方向部7bとベローズの受圧内径が径方向において同じ場合に比べ、流体圧力により回転環背面にかかる力が弱くなり、より摺動面が開く恐れが無い。
ここで、カップガスケット7の径方向部7bの高圧流体側に近い位置の径方向シール部Bの一部を回転側摺動環5とスリーブ2の径方向部2bとの軸方向間隔よりも軸方向に大きくし、内径側に高圧流体が漏れない構造としてもよく、また、カップガスケット7の軸方向部7aの低圧流体側に近い位置の回転側摺動環の軸方向シール部Cを回転側摺動環5とスリーブ2の軸方向部2aとの径方向間隔よりも径方向に大きくし、万が一高圧流体が漏れてきても低圧流体側へと漏れない構造としても良い。
さらに、カップガスケット7の回転側摺動環5のカット部5aに面するコーナー部7cの内面はカット部5aに沿うテーパ状に形成され、コーナー部7cの外面はスリーブ2の外面に沿うように略直角(角部にはR加工が施されている。)に形成され、カップガスケット7のコーナー部7cの厚さtは回転側摺動環5の内径側とスリーブ2の内筒部2aの隙間dより大きく設定されている。
高圧流体は、破線で示すように、摺動面Sでシールされていることはもちろんであるが、カップガスケット7の径方向部7bの高圧流体側に近い位置の径方向シール部Bでもシール(2次シール)されている。このため、回転側摺動環5及びカップガスケット7は、高圧流体により、矢印で示すような圧力を受ける。その際、回転側摺動環5にかかる径方向の力Fkは回転側摺動環5を内径側に縮めるように働くが、回転側摺動環5の剛性が高いため、無視できる程度の力であり、(逆に無視できない程度の力である場合、回転側密封環5を破壊してしまう)、カップガスケット7は回転側摺動環5から径方向の力の影響を受けないため、回転側摺動環5により摺動面Sと反対方向の軸力Fjと、スリーブ2からの反力でもってスリーブ2と回転側摺動環5とにより挟着される。また、カップガスケット7は弾性体からなり、弾性体は加わる力により変形し、変形する量により接触部分の摩擦による抵抗力が増加するが、カップガスケット7の変形量はFjに依存するため、カップガスケット7の抜けに対向する抵抗力は軸力Fjに依存することになる。
回転側摺動環5に作用する摺動面Sと反対方向の軸力Fjは、固定側摺動環6から受ける力をF1、高圧流体から受ける摺動面Sと反対方向の軸力をF2、及び、高圧流体から受ける摺動面S方向の軸力をF3とすると、
Fj=F1+F2-F3
となる。
このうち、F3は、径方向シール部Bの径方向の位置により変化する。そして、径方向シール部Bの径方向の位置は、カップガスケット7の径方向部7bの長さに依存し、長さが長い程(回転側摺動環5の背面が径方向部7bで覆われる部分が多くなる程)F3を小さくでき、結果として、Fjを大きくできる。
(1)図4(b)に示すような回転側摺動環5の高圧流体側にカップガスケットを設ける場合に比べ摺動発熱に対する放熱性を低下させることがなく、同時に、図4(c)に示すようなカップガスケットの径方向部の肉厚を厚く設定した場合に比べ軸方向の寸法を拡大させることがなく、カップガスケットの低圧流体側への抜け防止を図ることができる。
(2)回転側摺動環5は、内径側であって摺動面Sの反対側のコーナー部がテーパ状にカットされたカット部5aを有する断面5角形に形成されているため、シール性能に影響を与えることなく、回転側摺動環5を軽量化できる。
(3)カップガスケット7は、軸方向部7a及び径方向部7bとからなる断面が略L字形状に形成されているため、回転側摺動環5の反摺動面方向の軸力Fjを一定の大きさに保持でき、カップガスケット7の径方向部7bを確実に挟着することができ、カップガスケットの低圧流体側への抜け防止に貢献できる。
(4)カップガスケット7のコーナー部7cの厚さtは回転側摺動環5の内径側とスリーブ2の内筒部2aとの隙間dより大きく設定されているため、カップガスケットの低圧流体側への抜けを物理的に防止することができる。
(5)万一、カップガスケット7の軸方向部7aが破損した場合でも、カップガスケットが低圧流体側へ抜けることがないため、径方向部7bでもってシール性を維持できる。
図2に示す実施例2は、回転側摺動環5の内径側であって背面側のコーナー部が内方に窪んだ形状にカットされたカット部を有する点で、図1に示した実施例1と相違するが、その他の構成は実施例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。
図2の場合、カット部15aは角形に窪んでいるが、これに限らず、円弧状の窪み、曲線状の窪みでもよい。
なお、断面略6角形とは、カット部15aが円弧状などの窪みの場合、該窪みは厳密には角部を形成しないが、該窪みの中点を1つの角部とみなして6角と数えるという意味であると共に、また、カット部15aの両端の2つの角部以外の3つの角部において面取りなどが施されることがあるため、厳密な意味では6角形ではないが、面取りを無視した場合の基本的形状が6角形であるという意味である。
図3に示す実施例3は、回転側摺動環と固定側摺動環との摺動面の内径側に高圧の被密封流体が存在するアウトサイド形のメカニカルシールである点で、上記実施例1と相違するが、その他の構成は実施例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。
図3の左側が低圧流体側(大気側)、右側が高圧流体側(被密封流体側)である。
回転側摺動環25は、外径側であって背面側のコーナー部がテーパ状にカットされたカット部25aを有する断面5角形に形成されている。
また、カップガスケット27のコーナー部27cの厚さtは回転側摺動環25の外径側とスリーブ22の外筒部22cとの隙間dより大きく設定される。
(1)図4(b)に示すような回転側摺動環25の高圧流体側にカップガスケットを設ける場合に比べ摺動発熱に対する放熱性を低下させることがなく、同時に、図4(c)に示すようなカップガスケットの径方向部の肉厚を厚く設定した場合に比べ軸方向の寸法を拡大させることがなく、カップガスケットの低圧流体側への抜け防止を図ることができる。
(2)回転側摺動環25は、外径側であって反摺動面S側のコーナー部がテーパ状にカットされたカット部25a有する断面5角形に形成されているため、シール性能に影響を与えることなく、回転側摺動環25を軽量化できる。
(3)カップガスケット27は、軸方向部27a及び径方向部27bとからなる断面が略L字形状に形成されているため、回転側摺動環25の反摺動面方向の軸力Fjを一定の大きさに保持でき、カップガスケット27の径方向部27bを確実に挟着することができ、カップガスケットの低圧流体側への抜け防止に貢献できる。
(4)カップガスケット27のコーナー部27cの厚さtは回転側摺動環25の外径側とスリーブ22の内筒部22aとの隙間dより大きく設定されているため、カップガスケットの低圧流体側への抜けを物理的に防止することができる。
(5)万一、カップガスケット27の軸方向部27aが破損した場合でも、カップガスケットが低圧流体側へ抜けることがないため、径方向部27bでもってシール性を維持できる。
2、22 スリーブ
2a、22a 内筒部
2b、22b 径方向部
2c、22c 外筒部
3 ハウジング
4 カートリッジ
5、15、25 回転側摺動環
6 固定側摺動環
7、17、27 カップガスケット
7a、17a、27a 軸方向部
7b、17b、27b 径方向部
8 ベローズ
9 ケース
10 ドライビングバンド
11 コイルドウェーブスプリング
Claims (3)
- 回転軸に固定されるスリーブと、ハウジングに固定されるカートリッジとを備え、前記スリーブにはカップガスケットを介して回転側摺動環が設けられ、前記カートリッジには前記回転側摺動環に対向して摺動する固定側摺動環が設けられ、前記回転側摺動環と固定側摺動環との摺動面の外径側に高圧流体が存在するインサイド形のメカニカルシールにおいて、前記回転側摺動環は、内径側であって背面側のコーナー部がテーパ状にカットされたカット部を有する断面略5角形に形成され、前記カップガスケットは、前記回転側摺動環の内径側及び前記背面側に跨って装着され、前記回転側摺動環の内径側及び前記スリーブの内筒部と接する軸方向部及び前記回転側摺動環の背面側及び前記スリーブの径方向部と接する径方向部とからなる断面が略L字形状に形成されると共に、前記カット部に面するコーナー部は前記カット部に沿う形状に形成され、前記カップガスケットのコーナー部の厚さtは前記回転側摺動環の内径側と前記スリーブの内筒部の隙間dより大きく設定されることを特徴とするメカニカルシール。
- 回転軸に固定されるスリーブと、ハウジングに固定されるカートリッジとを備え、前記スリーブにはカップガスケットを介して回転側摺動環が設けられ、前記カートリッジには前記回転側摺動環に対向して摺動する固定側摺動環が設けられ、前記回転側摺動環と固定側摺動環との摺動面の外径側に高圧流体が存在するインサイド形のメカニカルシールにおいて、前記回転側摺動環は、内径側であって背面側のコーナー部が内方に窪んだ形状にカットされたカット部を有する断面略6角形に形成され、前記カップガスケットは、前記回転側摺動環の内径側及び前記背面側に跨って装着され、前記回転側摺動環の内径側及び前記スリーブの内筒部と接する軸方向部及び前記回転側摺動環の背面側及び前記スリーブの径方向部と接する径方向部とからなる断面が略L字形状に形成されると共に、前記カット部に面するコーナー部は前記カット部に沿う形状に形成され、前記カップガスケットのコーナー部の厚さtは前記回転側摺動環の内径側と前記スリーブの内筒部の隙間dより大きく設定されることを特徴とするメカニカルシール。
- 回転軸に固定されるスリーブと、ハウジングに固定されるカートリッジとを備え、前記スリーブにはカップガスケットを介して回転側摺動環が設けられ、前記カートリッジには前記回転側摺動環に対向して摺動する固定側摺動環が設けられ、前記回転側摺動環と固定側摺動環との摺動面の内径側に高圧の被密封流体が存在するアウトサイド形のメカニカルシールにおいて、前記回転側摺動環は、外径側であって背面側のコーナー部がテーパ状にカットされたカット部を有する断面5角形、または、内方に窪んだ形状にカットされたカット部を有する断面略6角形に形成され、前記カップガスケットは、前記回転側摺動環の背面側及び前記スリーブの外筒部に跨って装着され、前記回転側摺動環の外径側及び前記スリーブの外筒部と接する軸方向部及び前記回転側摺動環の背面側及び前記スリーブの外筒部と接する径方向部とからなる断面が略L字形状に形成されると共に、前記カット部に面するコーナー部は前記カット部に沿う形状に形成され、前記カップガスケットのコーナー部の厚さtは前記回転側摺動環の背面側と前記スリーブの径方向部の隙間dより大きく設定されることを特徴とするメカニカルシール。
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EP (1) | EP3199846B1 (ja) |
JP (1) | JP6479831B2 (ja) |
CN (1) | CN106605089B (ja) |
AU (1) | AU2015322889B2 (ja) |
WO (1) | WO2016047352A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3485184A4 (en) * | 2016-07-12 | 2020-03-18 | John Crane Inc. | NON-FOLDABLE FLEXIBLE MEMBRANE AND SEALING ARRANGEMENT FOR A ROTARY SHAFT EQUIPMENT |
US11473680B2 (en) | 2016-07-12 | 2022-10-18 | John Crane Inc. | Non-collapsible flexible sealing membrane and seal assembly for rotary shaft equipment |
WO2023228943A1 (ja) * | 2022-05-25 | 2023-11-30 | イーグル工業株式会社 | メカニカルシール |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018207746A1 (ja) | 2017-05-12 | 2018-11-15 | イーグル工業株式会社 | メカニカルシール |
EP3623670A4 (en) * | 2017-05-12 | 2021-01-20 | Eagle Industry Co., Ltd. | MECHANICAL SEAL |
ES2824772T3 (es) * | 2017-11-20 | 2021-05-13 | Sulzer Management Ag | Bomba para un fluido |
US20240003423A1 (en) * | 2021-02-12 | 2024-01-04 | Parker-Hannifin Corporation | Hybrid shaft seal assembly for movable shafts |
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JPH0611045A (ja) * | 1992-06-22 | 1994-01-21 | Aisin Seiki Co Ltd | メカニカルシール |
JPH1150995A (ja) * | 1997-08-06 | 1999-02-23 | Toyota Motor Corp | ウォータポンプ用メカニカルシールとその成形方法 |
WO2010004809A1 (ja) * | 2008-07-07 | 2010-01-14 | イーグル工業株式会社 | メカニカルシール装置 |
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US4779876A (en) * | 1987-05-11 | 1988-10-25 | John Crane-Houdaille. Inc. | Drive for banded washer type seal |
DE19637813C2 (de) * | 1996-09-17 | 2001-12-06 | Freudenberg Carl Fa | Gleitringdichtung |
JP4481690B2 (ja) * | 2004-03-19 | 2010-06-16 | イーグル工業株式会社 | メカニカルシール装置 |
DE102004036974B3 (de) * | 2004-07-30 | 2005-08-04 | Federal-Mogul Friedberg Gmbh | Gleitringdichtung |
EP2246597B1 (en) * | 2008-02-25 | 2018-04-04 | Eagle Industry Co., Ltd. | Shaft sealing device |
DE102009049093A1 (de) * | 2009-10-01 | 2011-04-07 | Kaco Gmbh + Co. Kg | Gleitringdichtung |
CN102011868A (zh) * | 2010-11-12 | 2011-04-13 | 昆明嘉和科技股份有限公司 | 一种具有自循环作用的无水机械密封 |
DE102011005108A1 (de) * | 2011-03-04 | 2012-09-06 | Mahle International Gmbh | Gleitringdichtung |
CN202418594U (zh) * | 2011-12-23 | 2012-09-05 | 艾志(南京)环保管接技术股份有限公司 | 一种重载荷机械密封装置 |
CN102927286A (zh) * | 2012-11-01 | 2013-02-13 | 安徽亚兰密封件有限公司 | 大轴径双浮动集装式机械密封 |
-
2015
- 2015-08-26 AU AU2015322889A patent/AU2015322889B2/en not_active Ceased
- 2015-08-26 CN CN201580045859.7A patent/CN106605089B/zh active Active
- 2015-08-26 US US15/505,580 patent/US20180106378A1/en not_active Abandoned
- 2015-08-26 JP JP2016550053A patent/JP6479831B2/ja active Active
- 2015-08-26 WO PCT/JP2015/074058 patent/WO2016047352A1/ja active Application Filing
- 2015-08-26 EP EP15843801.0A patent/EP3199846B1/en active Active
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JPH0611045A (ja) * | 1992-06-22 | 1994-01-21 | Aisin Seiki Co Ltd | メカニカルシール |
JPH1150995A (ja) * | 1997-08-06 | 1999-02-23 | Toyota Motor Corp | ウォータポンプ用メカニカルシールとその成形方法 |
WO2010004809A1 (ja) * | 2008-07-07 | 2010-01-14 | イーグル工業株式会社 | メカニカルシール装置 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3485184A4 (en) * | 2016-07-12 | 2020-03-18 | John Crane Inc. | NON-FOLDABLE FLEXIBLE MEMBRANE AND SEALING ARRANGEMENT FOR A ROTARY SHAFT EQUIPMENT |
US11473680B2 (en) | 2016-07-12 | 2022-10-18 | John Crane Inc. | Non-collapsible flexible sealing membrane and seal assembly for rotary shaft equipment |
EP4141296A1 (en) * | 2016-07-12 | 2023-03-01 | John Crane Inc. | Non-collapsible flexible sealing membrane and seal assembly for rotary shaft equipment |
US12055222B2 (en) | 2016-07-12 | 2024-08-06 | John Crane Inc. | Non-collapsible flexible sealing membrane and seal assembly for rotary shaft equipment |
WO2023228943A1 (ja) * | 2022-05-25 | 2023-11-30 | イーグル工業株式会社 | メカニカルシール |
Also Published As
Publication number | Publication date |
---|---|
EP3199846A1 (en) | 2017-08-02 |
JPWO2016047352A1 (ja) | 2017-07-06 |
AU2015322889B2 (en) | 2018-10-04 |
AU2015322889A1 (en) | 2017-03-16 |
JP6479831B2 (ja) | 2019-03-06 |
US20180106378A1 (en) | 2018-04-19 |
CN106605089B (zh) | 2018-07-06 |
EP3199846B1 (en) | 2019-05-15 |
EP3199846A4 (en) | 2018-05-23 |
CN106605089A (zh) | 2017-04-26 |
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