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公开(公告)号：EP3779247A1
公开(公告)日：2021-02-17
申请号：EP19780777.9
申请日：2019-04-02
发明人： KITO Masakazu , TAKIGAHIRA Yoshiaki
摘要： To provide a mechanical seal in which a torque is less likely to be transmitted to bolts and in which the bolts can be prevented from loosening.
A mechanical seal 1 includes rotating seal ring 20, 21 which rotate with a rotary shaft 2, stationary seal rings 30, 31, and an adaptor 5 which holds the stationary seal rings 30, 31, the adaptor 5 being fixed to a seal cover 3 by bolts 11. The mechanical seal 1 further includes a plurality of holders 9 brought into contact with the adapter 5 and provided with through holes 9d. A body part 11a of each of the bolts 11 passes through each of the through holes 9d and is screwed into each of threaded holes 3f formed in the seal cover 3. The plurality of holders 9 being arranged so as to surround the rotary shaft 2.-
公开(公告)号：EP3450805A1
公开(公告)日：2019-03-06
申请号：EP17789310.4
申请日：2017-04-14
发明人： TAKIGAHIRA Yoshiaki , KITO Masakazu
摘要： There is provided a bellows mechanical seal with a high degree of freedom in arrangement of a collar and a secondary seal.
In a bellows mechanical seal (1), a collar (3) attached to a seal ring (15) through a bellows (13) has a restriction piece (4), (8) extending toward at least one of an inner diameter side or an outer diameter side. The bellows mechanical seal (1) includes an adaptor (50), (70) which is attached to the collar (3), whose axial movement is restricted by the restriction piece (4), (8), and which extends to the inner diameter side or the outer diameter side over the restriction piece (4), (8). The collar (3) and the adaptor (50), (70) form at least part of a housing space (S), (S') having the secondary seal (60), (80) housed therein.-
公开(公告)号：EP4160058A1
公开(公告)日：2023-04-05
申请号：EP21818954.6
申请日：2021-05-31
发明人： NEGISHI Yuta , UCHIYAMA Ryosuke , INOUE Hiroki , ONUMA Minori , TAKIGAHIRA Yoshiaki , KATORI Hikaru , NAKAHARA Nobuo , HOSOE Takeshi
IPC分类号： F16J15/34
摘要： Provided is a sliding component capable of suppressing a wear between sliding surfaces and suppressing a leakage of a sealing target fluid in any one of a normal rotation and a reverse rotation. The sliding component is an annular sliding component 10 which is disposed at a relatively rotating position of a rotating machine, slides relative to another sliding component 20, and includes a sliding surface 11 provided with a plurality of fluid introduction grooves 16 communicating with a space S2 on the side of a sealing target fluid F and introducing the sealing target fluid F thereinto and a plurality of inclined grooves 14 extending from a leakage side toward the sealing target fluid F and generating a dynamic pressure and the sliding surface 11 of the sliding component 10 is provided with a reverse inclined groove 15 which is provided on the side of the sealing target fluid F of the inclined groove 14, extends in a reverse direction with respect to the inclined groove 14, and generates a dynamic pressure.
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公开(公告)号：EP3922877A1
公开(公告)日：2021-12-15
申请号：EP20752625.2
申请日：2020-01-31
摘要： Provided are a sliding component capable of sustaining inter-sliding surface lubricity for a long time and a method for manufacturing a sliding component. At least one of a pair of sliding members 10 and 20 is provided with: a group of recessed portions 22A including a plurality of recessed portions 22 and 22' formed in a sliding surface 21 of the sliding member 20; and a plurality of hollow portions 24a to 24d and 24a' to 24d' formed inside the sliding member 20 so as to be out of alignment with the recessed portions 22 and 22' in a thickness direction of the sliding member 20. The sliding member 20 is further provided with the hollow portions 24a to 24d and 24a' to 24d' disposed so as to generate at least part of a new group of recessed portions until the sliding member 20 is worn by the thickness of deepest one of the recessed portions 22 and 22'.
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公开(公告)号：EP4160057A1
公开(公告)日：2023-04-05
申请号：EP21818322.6
申请日：2021-05-31
发明人： NEGISHI Yuta , UCHIYAMA Ryosuke , INOUE Hiroki , ONUMA Minori , TAKIGAHIRA Yoshiaki , KATORI Hikaru , NAKAHARA Nobuo , HOSOE Takeshi
IPC分类号： F16J15/34
摘要： Provided is a sliding component capable of suppressing a wear between sliding surfaces and suppressing a leakage of a sealing target fluid in any one of a normal rotation and a reverse rotation. The sliding component is an annular sliding component 10 which is disposed at a relatively rotating position of a rotating machine, slides relative to the other sliding component 20, and includes a sliding surface 11 provided with a plurality of fluid introduction grooves 16 communicating with a space S2 on the side of a sealing target fluid F and introducing the sealing target fluid F and a plurality of inclined grooves 14 extending from a leakage side toward the sealing target fluid F and generating a dynamic pressure and the sliding surface 11 of the sliding component 10 is provided with at least a concave portion 15 disposed between adjacent two of the fluid introduction grooves 16 in the circumferential direction.
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公开(公告)号：EP3816487A1
公开(公告)日：2021-05-05
申请号：EP19803232.8
申请日：2019-05-16
发明人： KIMURA Wataru , TOKUNAGA Yuichiro , TAKIGAHIRA Yoshiaki , KONO Toru , KASAHARA Hidetoshi , HIROMATSU Jun , OTA Takafumi
IPC分类号： F16J15/18
摘要： Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring 1 for sealing a clearance between a rotary shaft 2 and a housing 3 includes; inclined grooves 15 formed at a sliding surface S1 so as to be arranged in a circumferential direction, the inclined grooves 15 being closed on an outer diameter side thereof and configured to generate a dynamic pressure; and supply grooves 13 opening on a sealed fluid side and communicating with an inner diameter side of the inclined grooves 15.
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公开(公告)号：EP4145024A1
公开(公告)日：2023-03-08
申请号：EP21779166.4
申请日：2021-03-26
IPC分类号： F16J15/26
摘要： Provided is a seal structure that can achieve the effects of excellently improving the sealing performance and providing low frictional properties for a gap between a shaft member and a bush.
The seal structure includes a shaft member (13), a bush (11) having a shaft hole (11c) for passing the shaft member (13), a pressure-receiving member (16) having a facing surface (16a) facing an end surface (11b) of the bush (11) on one side (i.e., a lower side (b)) in the direction of the axis x, and an elastic member (14) that presses the bush (11) against the pressure-receiving member (16) from another side (i.e., an upper side (a)) in the direction of the axis x, in which a first coating layer (12A) is formed between an outer peripheral surface of the shaft member (13) and an inner peripheral surface (11d) of the shaft hole (11c) of the bush (11), and a second coating layer (12B) is formed between the end surface (11b) of the bush (11) on one side (i.e., the lower side (b)) in the direction of the axis x and the facing surface (16a) of the pressure-receiving member (16).-
公开(公告)号：EP3795868A1
公开(公告)日：2021-03-24
申请号：EP19804382.0
申请日：2019-05-16
发明人： KIMURA Wataru , TOKUNAGA Yuichiro , TAKIGAHIRA Yoshiaki , KONO Toru , KASAHARA Hidetoshi , HIROMATSU Jun , OTA Takafumi
IPC分类号： F16J15/18 , F16J15/324 , F16J15/3272
摘要： Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring 1 for sealing a clearance between a rotary shaft 2 and a housing 3 includes dynamic pressure grooves 12 formed at a sliding surface S1 of the seal ring 1 and arranged in a circumferential direction so as to be configured to generate dynamic pressure. The dynamic pressure grooves 12 include deep grooves 120 having openings on a sealed fluid side and shallow grooves 121 being shallower than the deep grooves. The shallower grooves 121 are formed continuously to the deep grooves 120 and extend to at least one side in the circumferential direction. At least adjacent two of the deep grooves 120, 120' of the dynamic pressure grooves 12, 12' in the circumferential direction are formed as a dynamic pressure groove unit 100 configured such that the adjacent two of the deep grooves 120, 120' communicate with each other through a communication groove 14 extending in the circumferential direction on an opposite side of the openings of the deep grooves 120, 120' in a radial direction.
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