WO2015190350A1 - メカニカルシール - Google Patents
メカニカルシール Download PDFInfo
- Publication number
- WO2015190350A1 WO2015190350A1 PCT/JP2015/065886 JP2015065886W WO2015190350A1 WO 2015190350 A1 WO2015190350 A1 WO 2015190350A1 JP 2015065886 W JP2015065886 W JP 2015065886W WO 2015190350 A1 WO2015190350 A1 WO 2015190350A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bellows
- retainer
- mechanical seal
- radial direction
- ring
- Prior art date
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- 239000012530 fluid Substances 0.000 claims abstract description 17
- 238000013016 damping Methods 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 description 27
- 238000007789 sealing Methods 0.000 description 3
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
Images
Classifications
-
- 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
- F16J15/3436—Pressing means
- F16J15/3448—Pressing means the pressing force resulting from fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3464—Mounting of the seal
- F16J15/3476—Means for minimising vibrations of the slip-ring
-
- 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
-
- 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
- F16J15/363—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 the diaphragm or bellow being made of metal
- F16J15/366—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 the diaphragm or bellow being made of metal and comprising vibration-damping means
-
- 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
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
Definitions
- the present invention relates to a mechanical seal.
- the stationary mechanical seal is provided with a pressing mechanism that presses the stationary ring toward the rotating ring.
- a pressing mechanism that presses the stationary ring toward the rotating ring.
- an annular sealed space is formed by providing bellows on each of the radially outer side and the inner side, and the bellows is expanded and contracted by controlling the fluid pressure in the sealed space.
- a technique is known (see Patent Document 1).
- double bellows are provided on the outer side and the inner side in the radial direction. In this case, since the minimum inner diameter on the inner peripheral side of the outer bellows must be larger than the maximum outer diameter on the outer peripheral side of the inner bellows, the mechanical seal becomes larger in the radial direction.
- An object of the present invention is to reduce the radial size of a mechanical seal including a pressing mechanism configured to expand and contract these bellows in response to fluid pressure in an annular sealed space formed by two bellows. It is to provide a mechanical seal that can be made possible.
- the present invention employs the following means in order to solve the above problems.
- the mechanical seal of the present invention is A rotating ring fixed to the rotation axis; A fixed ring that is fixed to a housing having a shaft hole through which the rotary shaft is inserted and that slides with respect to the rotary ring; A pressing mechanism for pressing the stationary ring toward the rotating ring; A mechanical seal comprising: The pressing mechanism is A first bellows provided outside in the radial direction; A second bellows provided inside in the radial direction; With An annular sealed space is formed by the first bellows and the second bellows, and the members provided on both ends of the first bellows and the second bellows, and the first bellows and the second bellows are formed according to the fluid pressure in the sealed space.
- the first bellows and the second bellows are disposed at positions separated from each other in the central axis direction, and when viewed in the central axis direction, a part of the inner side in the radial direction of the first bellows and the diameter of the second bellows. It arrange
- the “rotating ring fixed to the rotating shaft” includes a case where the rotating ring is fixed to the rotating shaft via a plurality of members.
- the fixed ring that is fixed to the housing having the shaft hole through which the rotating shaft is inserted and that slides with respect to the rotating ring”
- the fixed ring is connected to the housing via a plurality of members. The case where it is fixed is also included.
- the minimum inner diameter on the inner peripheral side of the first bellows is smaller than the maximum outer diameter on the outer peripheral side of the second bellows. Accordingly, it is possible to reduce the size in the radial direction as compared with a mechanical seal provided with a pressing mechanism in which bellows are doubled on the outer side and the inner side in the radial direction.
- a damping member for suppressing vibration of the pressing mechanism is provided inside the first bellows in the radial direction.
- the damping member By providing the damping member in this way, the vibration of the pressing mechanism can be suppressed and the influence of disturbance can be made difficult. Moreover, since the damping member should just be provided in the dead space formed inside the radial direction of a 1st bellows, size reduction of radial direction is not prevented.
- a first retainer and a second retainer for fixing the first bellows are provided on one end side and the other end side of the first bellows
- a third retainer and a fourth retainer for fixing the second bellows are respectively provided at one end and the other end of the second bellows.
- the third retainer is configured to extend to the inner side in the radial direction of the first bellows
- a cylindrical member fixed to the fourth retainer is provided on the inner side in the radial direction of the third retainer
- An annular gap may be provided between the third retainer and the cylindrical member, and the vibration damping member may be disposed in the annular gap.
- the damping member may be a coil spring disposed so that a spring force is applied in a direction in which the first bellows and the second bellows are contracted.
- control for expanding and contracting the first bellows and the second bellows can be performed by the cooperation of the fluid pressure in the sealed space and the coil spring.
- the damping member is an elastic ring that is slidably in close contact with the inner peripheral surface of the third retainer and the outer peripheral surface of the cylindrical member.
- the function of sealing the annular gap between the inner peripheral surface of the third retainer and the outer peripheral surface of the cylindrical member can be exhibited by the elastic ring.
- the size in the radial direction can be reduced.
- FIG. 1 is a schematic cross-sectional view of a mechanical seal according to an embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view of a mechanical seal according to an embodiment of the present invention.
- the mechanical seal 100 serves to seal an annular gap between the rotation shaft 200 and a shaft hole provided in the housing 300 (a shaft hole through which the rotation shaft 200 is inserted).
- the mechanical seal 100 is fixed to the rotating shaft 200 via the sleeve 110, the rotating ring 120 fixed to the rotating shaft 200 via the sleeve 110, and the housing 300 via a plurality of members.
- the fixed ring 130 is provided.
- the annular protrusion 131 at the tip of the stationary ring 130 slides in a state of surface contact with the rotating ring 120, thereby exhibiting a sealing function by the mechanical seal 100.
- the left side is the machine inside (A)
- the right side is the machine outside (B)
- the mechanical seal 100 allows the fluid to be sealed on the machine inside (A) to be outside the machine ( B) is prevented from leaking.
- the mechanical seal 100 is provided with a pressing mechanism that presses the stationary ring 130 toward the rotating ring 120.
- the pressing mechanism includes a first bellows 141 provided on the outer side in the radial direction and a second bellows 151 provided on the inner side in the radial direction.
- a first retainer 142 is provided on one end side (machine inner side (A)) of the first bellows 141, and a second retainer 143 is provided on the other end side (machine outer side (B)) of the first bellows 141.
- the first bellows 141 is fixed by the first retainer 142 and the second retainer 143. Further, the fixed ring 130 is fixed to the first retainer 142.
- the second retainer 143 is fixed to the housing 300.
- a third retainer 152 is provided on one end side (machine inner side (A)) of the second bellows 151, and a fourth retainer 153 is provided on the other end side (machine outer side (B)) of the second bellows 151.
- the second bellows 151 is fixed by the third retainer 152 and the fourth retainer 153.
- the third retainer 152 includes a cylindrical portion 152a and an annular protrusion 152b extending radially inward on the other end side of the cylindrical portion 152a.
- the cylindrical portion 152 a of the third retainer 152 provided on one end side of the second bellows 151 is configured to extend to the inside in the radial direction of the first bellows 141.
- One end side of the cylindrical portion 152 a is fixed to the inner peripheral surface of the first retainer 142.
- the fourth retainer 153 is fixed to the housing 300.
- the first bellows 141, the first retainer 142 and the second retainer 143 provided on both sides of the first bellows 141, the second bellows 151, and the third retainer 152 and the fourth retainer 153 provided on both sides of the first bellows 141 are annularly sealed.
- a space S1 is formed.
- the first bellows 141 and the second bellows 151 expand and contract in the direction of the central axis of the rotary shaft 200 in accordance with the fluid pressure of a fluid such as gas sent from the passage 310 provided in the housing 300 to the sealed space S1. It is configured.
- the central axis direction of the rotating shaft 200 is hereinafter simply referred to as “central axis direction”.
- the first bellows 141 and the second bellows 151 can be expanded and contracted by controlling the fluid pressure in the sealed space S1 by the pressing mechanism configured as described above. Further, since the function of the damper is exhibited by the sealed space S1, vibration of the pressing mechanism can be suppressed.
- the stationary ring 130 is separated from the rotating ring 120 as shown in FIG. 1 in a state where no fluid is sent to the sealed space S1. Then, when the fluid is sent to the sealed space S1 and the fluid pressure in the sealed space S1 increases, the stationary ring 130 comes into close contact with the rotating ring 120 as shown in FIG.
- a cylindrical member 160 fixed to the fourth retainer 153 is provided inside the third retainer 152 in the radial direction.
- the cylindrical member 160 includes a cylindrical portion 161 and an annular protrusion 162 that extends radially outward on one end side of the cylindrical portion 161. Further, the other end portion of the cylindrical portion 161 is fixed to the fourth retainer 153.
- the outer peripheral surface of the annular protrusion 162 provided on the cylindrical member 160 is configured to slidably contact the inner peripheral surface of the cylindrical portion 152a of the third retainer 152. Further, the inner peripheral surface of the annular protrusion 152 b in the third retainer 152 is configured to slidably contact the outer peripheral surface of the cylindrical portion 161 in the cylindrical member 160. With the configuration as described above, an annular gap S ⁇ b> 2 having a rectangular cross section is formed between the third retainer 152 and the cylindrical member 160.
- the pressing mechanism mainly includes the first bellows 141, the first retainer 142, the second retainer 143, the second bellows 151, the third retainer 152, and the fourth retainer 153.
- a coil spring 170 as a vibration damping member is provided in the annular gap S2.
- the coil spring 170 is arranged so that one end side is in close contact with the annular protrusion 162 and the other end side is in close contact with the annular protrusion 152b so that a spring force is applied in a direction in which the first and second bellows 141 and 151 are contracted. Has been.
- first bellows and second bellows The arrangement configuration of the first bellows 141 and the second bellows 151 will be described in more detail.
- the first bellows 141 and the second bellows 151 are arranged at positions separated from each other in the central axis direction.
- the inner part of the first bellows 141 in the radial direction and the outer part of the second bellows 151 in the radial direction overlap each other. That is, the minimum inner diameter on the inner peripheral side of the first bellows 141 is configured to be smaller than the maximum outer diameter on the outer peripheral side of the second bellows 151.
- the minimum inner diameter on the inner peripheral side of the first bellows 141 is configured to be larger than the minimum inner diameter on the inner peripheral side of the second bellows 151.
- the first bellows 141 and the second bellows 151 are disposed at positions separated from each other in the central axis direction and are viewed in the central axis direction.
- the inner part of the first bellows 141 in the radial direction and the outer part of the second bellows 151 in the radial direction overlap each other. That is, the minimum inner diameter on the inner peripheral side of the first bellows 141 is smaller than the maximum outer diameter on the outer peripheral side of the second bellows 151. Accordingly, it is possible to reduce the size in the radial direction as compared with a mechanical seal provided with a pressing mechanism in which bellows are doubled on the outer side and the inner side in the radial direction.
- a coil spring 170 as a damping member that suppresses vibration of the pressing mechanism is provided in the annular gap S2 provided inside the first bellows 141 in the radial direction. Yes. Thereby, the vibration of the pressing mechanism is further suppressed, and it can be made difficult to be affected by disturbance.
- the minimum inner diameter on the inner peripheral side of the first bellows 141 is configured to be larger than the minimum inner diameter on the inner peripheral side of the second bellows 151.
- the 1st bellows 141 and the 2nd bellows 151 are arrange
- a coil spring 170 is employed as the damping member so that a spring force is applied in a direction in which the first bellows 141 and the second bellows 151 are contracted.
- the control for expanding and contracting the first bellows 141 and the second bellows 151 can be performed by the cooperation of the fluid pressure in the sealed space S1 and the coil spring 170.
- the stationary ring 130 can be more reliably separated from the rotating ring 120 by the coil spring 170.
- the damping member is not a coil spring, but the inner peripheral surface of the third retainer 152 (cylindrical portion 152a) and the cylindrical member 160 (cylindrical portion 161). It is also possible to employ an elastic ring 171 that is slidably in close contact with the outer peripheral surface. When this configuration is adopted, the elastic ring 171 can exert a function of sealing an annular gap between the inner peripheral surface of the third retainer 152 and the outer peripheral surface of the cylindrical member 160.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Architecture (AREA)
- Mechanical Sealing (AREA)
Abstract
Description
回転軸に対して固定される回転環と、
該回転軸が挿通される軸孔を有するハウジングに対して固定され、かつ前記回転環に対して摺動する固定環と、
該固定環を前記回転環に向けて押圧する押圧機構と、
を備えるメカニカルシールであって、
前記押圧機構は、
径方向の外側に設けられる第1ベローズと、
径方向の内側に設けられる第2ベローズと、
を備え、
これら第1ベローズ及び第2ベローズと、第1ベローズと第2ベローズの両端側にそれぞれ設けられる部材とによって環状の密閉空間が形成されており、該密閉空間内の流体圧力に応じて、第1ベローズ及び第2ベローズが前記回転軸の中心軸線方向に伸縮するように構成されたメカニカルシールにおいて、
第1ベローズと第2ベローズは、前記中心軸線方向に離れた位置に配置されると共に、前記中心軸線方向に見た場合に、第1ベローズの径方向の内側の一部と第2ベローズの径方向の外側の一部が重なるように配置されていることを特徴とする。
なお、「回転軸に対して固定される回転環」については、回転環が複数の部材を介して回転軸に固定される場合も含まれる。また、「該回転軸が挿通される軸孔を有するハウジングに対して固定され、かつ前記回転環に対して摺動する固定環」についても、固定環がハウジングに対して複数の部材を介して固定される場合も含まれる。
第2ベローズの一端側と他端側には、それぞれ第2ベローズを固定する第3リテーナと第4リテーナが設けられており、
第3リテーナは、第1ベローズの径方向の内側にまで伸びるように構成されており、かつ第3リテーナの径方向の内側には第4リテーナに固定された円筒状部材が設けられると共に、
第3リテーナと前記円筒状部材との間に環状隙間が設けられ、該環状隙間内に前記制振部材が配置されているとよい。
<メカニカルシール>
図1及び図2を参照して、本発明の実施例に係るメカニカルシールの構成について説明する。本実施例に係るメカニカルシール100は、回転軸200とハウジング300に設けられている軸孔(回転軸200が挿通される軸孔)との間の環状隙間を密封する役割を担っている。そして、メカニカルシール100は、回転軸200に固定されるスリーブ110と、回転軸200に対してスリーブ110を介して固定される回転環120と、ハウジング300に対して複数の部材を介して固定される固定環130とを備えている。なお、回転軸200が回転している際に、固定環130の先端の環状突起131が回転環120に対して面接触した状態で摺動することにより、メカニカルシール100による密封機能が発揮される。また、本実施例においては、図1,2中、左側が機内側(A)、右側が機外側(B)であり、メカニカルシール100によって、機内側(A)の密封対象流体が機外側(B)に漏れることを防止している。
第1ベローズ141及び第2ベローズ151の配置構成について、より詳細に説明する。第1ベローズ141と第2ベローズ151は、中心軸線方向に離れた位置に配置されている。そして、中心軸線方向に見た場合に、第1ベローズ141の径方向の内側の一部と第2ベローズ151の径方向の外側の一部が重なるように配置されている。つまり、第1ベローズ141における内周側の最小内径は、第2ベローズ151における外周側の最大外径よりも小さく構成されている。なお、第1ベローズ141における内周側の最小内径が、第2ベローズ151における内周側の最小内径よりも大きく構成されていることは言うまでもない。
以上のように構成される本実施例に係るメカニカルシール100によれば、第1ベローズ141と第2ベローズ151は、中心軸線方向に離れた位置に配置されると共に、中心軸線方向に見た場合に、第1ベローズ141の径方向の内側の一部と第2ベローズ151の径方向の外側の一部が重なるように配置されている。つまり、第1ベローズ141における内周側の最小内径は、第2ベローズ151における外周側の最大外径よりも小さい。従って、径方向の外側と内側にベローズが2重に設けられる押圧機構を備えるメカニカルシールに比べて、径方向の小型化を図ることが可能となる。
110 スリーブ
120 回転環
130 固定環
131 環状突起
141 第1ベローズ
142 第1リテーナ
143 第2リテーナ
151 第2ベローズ
152 第3リテーナ
152a 円筒部
152b 環状突起
153 第4リテーナ
160 円筒状部材
161 円筒部
162 環状突起
170 コイルばね
171 弾性体製リング
200 回転軸
300 ハウジング
310 通路
S1 密閉空間
S2 環状隙間
Claims (5)
- 回転軸に対して固定される回転環と、
該回転軸が挿通される軸孔を有するハウジングに対して固定され、かつ前記回転環に対して摺動する固定環と、
該固定環を前記回転環に向けて押圧する押圧機構と、
を備えるメカニカルシールであって、
前記押圧機構は、
径方向の外側に設けられる第1ベローズと、
径方向の内側に設けられる第2ベローズと、
を備え、
これら第1ベローズ及び第2ベローズと、第1ベローズと第2ベローズの両端側にそれぞれ設けられる部材とによって環状の密閉空間が形成されており、該密閉空間内の流体圧力に応じて、第1ベローズ及び第2ベローズが前記回転軸の中心軸線方向に伸縮するように構成されたメカニカルシールにおいて、
第1ベローズと第2ベローズは、前記中心軸線方向に離れた位置に配置されると共に、前記中心軸線方向に見た場合に、第1ベローズの径方向の内側の一部と第2ベローズの径方向の外側の一部が重なるように配置されていることを特徴とするメカニカルシール。 - 第1ベローズの径方向の内側に、前記押圧機構の振動を抑制する制振部材が設けられていることを特徴とする請求項1に記載のメカニカルシール。
- 第1ベローズの一端側と他端側には、それぞれ第1ベローズを固定する第1リテーナと第2リテーナが設けられており、
第2ベローズの一端側と他端側には、それぞれ第2ベローズを固定する第3リテーナと第4リテーナが設けられており、
第3リテーナは、第1ベローズの径方向の内側にまで伸びるように構成されており、かつ第3リテーナの径方向の内側には第4リテーナに固定された円筒状部材が設けられると共に、
第3リテーナと前記円筒状部材との間に環状隙間が設けられ、該環状隙間内に前記制振部材が配置されていることを特徴とする請求項2に記載のメカニカルシール。 - 前記制振部材は、第1ベローズ及び第2ベローズを縮ませる方向にばね力が付与されるように配置されるコイルばねであることを特徴とする請求項3に記載のメカニカルシール。
- 前記制振部材は、第3リテーナの内周面と前記円筒状部材の外周面に対してそれぞれ摺動可能に密着する弾性体製リングであることを特徴とする請求項3に記載のメカニカルシール。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/316,894 US9631727B1 (en) | 2014-06-13 | 2015-06-02 | Mechanical seal |
JP2016527753A JP6392868B2 (ja) | 2014-06-13 | 2015-06-02 | メカニカルシール |
EP15806195.2A EP3156700B1 (en) | 2014-06-13 | 2015-06-02 | Mechanical seal |
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JP2014122166 | 2014-06-13 | ||
JP2014-122166 | 2014-06-13 |
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PCT/JP2015/065886 WO2015190350A1 (ja) | 2014-06-13 | 2015-06-02 | メカニカルシール |
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US (1) | US9631727B1 (ja) |
EP (1) | EP3156700B1 (ja) |
JP (1) | JP6392868B2 (ja) |
WO (1) | WO2015190350A1 (ja) |
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CN113494610A (zh) * | 2021-07-08 | 2021-10-12 | 西华大学 | 具有阻尼支撑的浮动环结构及机械密封装置 |
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US9732622B1 (en) * | 2015-06-16 | 2017-08-15 | Florida Turbine Technologies, Inc. | Self-balancing air riding seal for a turbine |
IT201800002027A1 (it) * | 2018-01-26 | 2019-07-26 | Turboden Spa | Dispositivo di tenuta di fluido per macchine rotanti |
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FR1237156A (fr) * | 1959-05-26 | 1960-07-29 | Hispano Suiza Sa | Perfectionnements apportés aux compresseurs à rotor, notamment à ceux pour fluide nocif |
JPS6199764U (ja) * | 1984-12-06 | 1986-06-26 |
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CN104995440A (zh) * | 2013-05-27 | 2015-10-21 | 伊格尔工业股份有限公司 | 机械密封装置 |
US9394799B1 (en) * | 2014-07-09 | 2016-07-19 | S & J Design Llc | Air riding seal for a turbine |
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- 2015-06-02 EP EP15806195.2A patent/EP3156700B1/en active Active
- 2015-06-02 US US15/316,894 patent/US9631727B1/en active Active
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Publication number | Priority date | Publication date | Assignee | Title |
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FR1237156A (fr) * | 1959-05-26 | 1960-07-29 | Hispano Suiza Sa | Perfectionnements apportés aux compresseurs à rotor, notamment à ceux pour fluide nocif |
JPS6199764U (ja) * | 1984-12-06 | 1986-06-26 |
Cited By (2)
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CN113494610A (zh) * | 2021-07-08 | 2021-10-12 | 西华大学 | 具有阻尼支撑的浮动环结构及机械密封装置 |
CN113494610B (zh) * | 2021-07-08 | 2023-06-27 | 西华大学 | 具有阻尼支撑的浮动环结构及机械密封装置 |
Also Published As
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JPWO2015190350A1 (ja) | 2017-04-20 |
US9631727B1 (en) | 2017-04-25 |
EP3156700B1 (en) | 2019-09-25 |
JP6392868B2 (ja) | 2018-09-19 |
EP3156700A4 (en) | 2018-02-14 |
US20170097095A1 (en) | 2017-04-06 |
EP3156700A1 (en) | 2017-04-19 |
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