WO2017094375A1 - Structure de raccord de tuyaux - Google Patents

Structure de raccord de tuyaux Download PDF

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Publication number
WO2017094375A1
WO2017094375A1 PCT/JP2016/080789 JP2016080789W WO2017094375A1 WO 2017094375 A1 WO2017094375 A1 WO 2017094375A1 JP 2016080789 W JP2016080789 W JP 2016080789W WO 2017094375 A1 WO2017094375 A1 WO 2017094375A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
working fluid
connection pipe
hole
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2016/080789
Other languages
English (en)
Japanese (ja)
Inventor
大洋 緒方
吉則 形谷
英俊 河西
隼人 池田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebara Corp
Original Assignee
Ebara Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ebara Corp filed Critical Ebara Corp
Publication of WO2017094375A1 publication Critical patent/WO2017094375A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D33/00—Rotary fluid couplings or clutches of the hydrokinetic type
    • F16D33/18—Details
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
    • F16L5/02—Sealing
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
    • F16L5/02—Sealing
    • F16L5/08—Sealing by means of axial screws compressing a ring or sleeve

Definitions

  • the present invention relates to a pipe connection structure for connecting one pipe to the other pipe, and more particularly to a pipe connection structure applied to a pipe through which a working fluid of a fluid coupling flows.
  • the fluid coupling is a device that transmits the rotation of the input shaft to the output shaft via the working fluid that exists between the impeller that is the input-side impeller and the runner that is the output-side impeller.
  • hydraulic oil is used as the working fluid.
  • the fluid coupling includes a scoop tube (rake pipe) that increases or decreases the amount of working fluid in a fluid chamber formed between the impeller and the runner. By increasing or decreasing the amount of working fluid in the fluid chamber, the rotational speed of the output shaft relative to the input shaft can be changed steplessly.
  • the pressure and temperature of the working fluid increase.
  • the working fluid temperature can reach 100 degrees.
  • the hot working fluid scooped up by the scoop tube is sent to the fluid cooling device, cooled by the fluid cooling device, and then returned to the fluid chamber.
  • the working fluid circulates between the fluid chamber and the fluid cooling device through the piping.
  • the piping expands due to the heat of the working fluid, and a load is applied to the piping and the connection portion between the pipings. And this causes damage to the piping and damage to the connecting portion, which may cause the working fluid to leak.
  • the present invention has been made in view of the above-described problems, and provides a pipe connection structure capable of preventing damage to a pipe and damage to a connection portion between pipes even when thermal expansion of the pipe occurs. For the purpose.
  • one aspect of the present invention includes a connection pipe through which a working fluid of a fluid coupling flows, a support member having a through hole into which the connection pipe is inserted, an outer peripheral surface of the connection pipe, and the An annular seal that seals a gap between the through hole and a flange member that presses the annular seal against the support member, and the diameter of the outer peripheral surface of the connection pipe is smaller than the diameter of the through hole.
  • the through hole has an annular inclined surface that gradually expands toward an end of the through hole, and the annular seal includes the annular inclined surface, the outer peripheral surface of the connection pipe, It is in contact with the flange member.
  • the connecting pipe is made of metal.
  • an external pipe having an external flange connected to the flange member is further provided.
  • a gap is formed between an end portion of the connection pipe and an end portion of the external pipe.
  • an inner diameter of the flange member is larger than a diameter of an outer peripheral surface of the connection pipe.
  • the connecting pipe is gently inserted into the through hole of the support member, the connecting pipe is allowed to move in the axial direction when the connecting pipe is thermally expanded. Therefore, no load is applied to the connecting pipe, and the connecting pipe can be prevented from being damaged. Furthermore, since the annular seal seals the gap between the outer peripheral surface of the connecting pipe and the through hole, the working fluid can be prevented from leaking.
  • FIG. 1 is a plan view schematically showing a fluid coupling.
  • the fluid coupling includes an impeller 1 and a runner 2 arranged to face each other, a drive shaft 11 to which the impeller 1 is fixed, and an output shaft 12 to which the runner 2 is fixed.
  • the impeller 1 is also called an input side impeller
  • the runner 2 is also called an output side impeller.
  • the impeller 1 and the runner 2 each have a hemispherical shape having a plurality of radial blades inside, and a fluid chamber 5 is formed between the impeller 1 and the runner 2.
  • the input shaft 15 is arranged in parallel with the drive shaft 11.
  • the input shaft 15 is supported by radial bearings 16 and 17.
  • a large gear 21 is fixed to the input shaft 15, and a small gear 22 that meshes with the large gear 21 is fixed to the drive shaft 11.
  • the end of the input shaft 15 is connected to a prime mover (not shown) such as an electric motor or a gas turbine. The rotation of the prime mover is transmitted from the input shaft 15 to the drive shaft 11 via the large gear 21 and the small gear 22.
  • the fluid coupling includes a working fluid circulation system 25 that supplies a working fluid to a fluid chamber 5 formed between the impeller 1 and the runner 2, and a scoop tube for increasing or decreasing the amount of the working fluid in the fluid chamber 5 ( Rake pipe) 30.
  • the tip 30 a of the scoop tube 30 is located in the impeller casing 7.
  • the impeller casing 7 is fixed to the impeller 1 and has a shape surrounding the runner 2.
  • the impeller casing 7 rotates together with the impeller 1.
  • An actuator 31 such as a hydraulic servo is connected to the scoop tube 30, and the scoop tube 30 can be moved in the radial direction of the impeller 1 and the runner 2 by the actuator 31.
  • the working fluid for example, hydraulic oil
  • the working fluid in the impeller casing 7 flows by the rotating impeller 1, and the flowing working fluid rotates the runner 2.
  • the working fluid circulation system 25 includes a fluid cooling device 26 for cooling the working fluid, and a working fluid circulation line 27 extending through the fluid cooling device 26.
  • the inlet of the working fluid circulation line 27 is connected to the scoop tube 30, and the outlet of the working fluid circulation line 27 communicates with the fluid chamber 5 between the impeller 1 and the runner 2.
  • the working fluid discharged from the impeller casing 7 through the scoop tube 30 flows through the working fluid circulation line 27 and is sent to the fluid cooling device 26.
  • the working fluid is cooled by heat exchange with the cooling water, and then returned to the fluid chamber 5 through the working fluid circulation line 27. In this way, the working fluid circulates between the fluid chamber 5 and the fluid cooling device 26 by its own pressure raised by the rotating impeller 1.
  • the impeller 1 is fixed to the drive shaft 11 and the runner 2 is fixed to the output shaft 12.
  • the rotation of the drive shaft 11 is transmitted from the impeller 1 to the runner 2 via the working fluid, and the output shaft 12 rotates.
  • the rotational speed of the runner 2 varies depending on the amount of working fluid in the fluid chamber 5 formed between the impeller 1 and the runner 2. Specifically, the rotation speed of the runner 2 increases as the amount of working fluid increases.
  • the amount of working fluid in the fluid chamber 5 varies depending on the position of the scoop tube 30. That is, when the tip 30a of the scoop tube 30 moves radially outward, the amount of working fluid decreases, and when the tip 30a of the scoop tube 30 moves radially inward, the amount of working fluid increases.
  • the amount of working fluid in the fluid chamber 5, that is, the rotational speed of the output shaft 12 can be changed.
  • FIG. 2 is a cross-sectional view showing an embodiment of the pipe connection structure.
  • the pipe connection structure includes a connection pipe 34 through which a working fluid of a fluid coupling flows, and a support member 35 having a through hole 35 a into which the connection pipe 34 is inserted.
  • the support member 35 is a casing that houses components such as the impeller 1 and the runner 2 described above.
  • the connecting pipe 34 is made of metal.
  • the diameter of the outer peripheral surface 34 a of the connection pipe 34 (that is, the outer diameter of the connection pipe 34) is slightly smaller than the diameter of the through hole 35 a, and the connection pipe 34 is supported by the support member 35. Since the connecting pipe 34 is gently inserted into the through hole 35a of the support member 35, the connecting pipe 34 is allowed to move in the axial direction. Therefore, one end 34b of the connection pipe 34 is a free end.
  • the other end 34c of the connecting pipe 34 is fixed to the fixing member 33 by a fastener 44 such as a screw. Therefore, the end 34c of the connection pipe 34 is a fixed end.
  • the fixing member 33 is, for example, a pipe through which the working fluid discharged through the scoop tube 30 described above flows, or another pipe.
  • the connection pipe 34 constitutes a part of the working fluid circulation line 27 described above.
  • An annular seal 48 is provided on the outer peripheral surface 34 a of the connection pipe 34 to seal a gap between the outer peripheral surface 34 a of the connection pipe 34 and the through hole 35 a of the support member 35.
  • the through hole 35a of the support member 35 has an annular inclined surface 55 that gradually widens toward the end of the through hole 35a.
  • the annular seal 48 is disposed between the outer peripheral surface 34 a of the connection pipe 34 and the annular inclined surface 55.
  • the annular seal 48 is, for example, an O-ring.
  • the outer peripheral surface 34a of the connecting pipe 34 has a tapered surface 56 in which the tip of the connecting pipe 34 is gradually narrowed toward the end 34b.
  • the tapered surface 56 is formed by grinding, for example.
  • the annular seal 48 is guided by the tapered surface 56 and attached to the outer peripheral surface 34 a of the connection pipe 34. As described above, by providing the tapered surface 56, the annular seal 48 can be mounted on the outer peripheral surface 34 a of the connection pipe 34 without damaging the annular seal 48.
  • the annular seal 48 is pressed against the annular inclined surface 55 of the support member 35 by an annular flange member 66.
  • the flange member 66 is connected to the outer flange 61 of the outer tube 60 by a plurality of screws 75.
  • An annular seal member 71 is disposed between the flange member 66 and the outer flange 61.
  • the seal member 71 is, for example, an annular gasket.
  • the screw 75 extends through the external flange 61, the seal member 71, and the flange member 66, and is screwed into a plurality of screw holes 35 c formed in the support member 35.
  • the other end of the external pipe 60 is connected to the fluid cooling device 26 described above, for example.
  • the flange member 66 is in contact with the end surface 35b of the support member 35, and the flange member 66 and the connection pipe 34 are disposed concentrically.
  • the inner diameter of the flange member 66 is larger than the diameter of the outer peripheral surface 34a of the connection pipe 34 and further larger than the diameter of the through hole 35a so that the flange member 66 does not hinder the movement of the connection pipe 34 in the axial direction. Therefore, the flange member 66 is not in contact with the connection pipe 34.
  • the annular seal 48 is in contact with the annular inclined surface 55 of the support member 35, the outer peripheral surface 34 a of the connection pipe 34, and the flange member 66.
  • the connecting pipe 34 is separated from the outer pipe 60. More specifically, a gap 80 is formed between the free end 34 b of the connection pipe 34 and the end 60 a of the outer pipe 60.
  • the gap 80 has such a size that it does not come into contact with the outer pipe 60 even if the connection pipe 34 expands due to the heat of the working fluid.
  • the working fluid flowing through the connection pipe 34 flows into the outer pipe 60 through the gap 80.
  • the annular seal 48 When the screw 75 is tightened, the gap between the flange member 66 and the external flange 61 is sealed by the seal member 71. At the same time, the annular seal 48 is pressed against the annular inclined surface 55 of the support member 35 by the flange member 66, and the annular seal 48 is guided by the annular inclined surface 55 and strongly pressed against the outer peripheral surface 34 a of the connection pipe 34. As a result, the annular seal 48 seals the space between the end surface 35 b of the support member 35 and the flange member 66 and the clearance between the through hole 35 a of the support member 35 and the outer peripheral surface 34 a of the connection pipe 34. Therefore, the annular seal 48 can prevent the working fluid from leaking.
  • connection pipe 34 is gently inserted into the through hole 35a of the support member 35, and the connection pipe 34 is not in contact with the external pipe 60.
  • the annular seal 48 is in close contact with the outer peripheral surface 34a of the connection pipe 34, but does not constrain the position of the connection pipe 34 in the axial direction. Therefore, even if the connection pipe 34 expands in the axial direction due to the heat of the working fluid, no stress is generated in the connection pipe 34, and as a result, the connection pipe 34 can be prevented from being damaged.
  • the working fluid can flow between the outer peripheral surface 34 a of the connection pipe 34 and the through hole 35 a of the support member 35 and / or the end surface 35 b of the support member 35 and the flange member. It is possible to prevent leakage from the space 66.
  • the present invention can be used for a pipe connection structure applied to a pipe through which a working fluid of a fluid coupling flows.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne une structure de raccord de tuyaux qui est appliquée à des tuyaux à travers lesquels s'écoule un fluide de travail pour un coupleur hydraulique. La structure de raccord de tuyaux comprend : un tuyau de liaison (34) à travers lequel s'écoule le fluide de travail pour un coupleur hydraulique ; un élément de support (35) ayant un trou traversant (35a) dans lequel est inséré le tuyau de liaison (34) ; un joint d'étanchéité annulaire (48) qui scelle hermétiquement un espace entre une surface périphérique externe (34a) du tuyau de liaison (34) et le trou traversant (35a) ; un élément de bride (66) qui presse le joint d'étanchéité annulaire (48) contre l'élément de support (35). Le diamètre de la surface périphérique externe (34a) du tuyau de liaison (34) est inférieur au diamètre du trou traversant (35a).
PCT/JP2016/080789 2015-12-01 2016-10-18 Structure de raccord de tuyaux Ceased WO2017094375A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015234583A JP2017101725A (ja) 2015-12-01 2015-12-01 配管接続構造
JP2015-234583 2015-12-01

Publications (1)

Publication Number Publication Date
WO2017094375A1 true WO2017094375A1 (fr) 2017-06-08

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ID=58797017

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Application Number Title Priority Date Filing Date
PCT/JP2016/080789 Ceased WO2017094375A1 (fr) 2015-12-01 2016-10-18 Structure de raccord de tuyaux

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JP (1) JP2017101725A (fr)
WO (1) WO2017094375A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348850A (en) * 1967-01-27 1967-10-24 Michael J Scales Pipe joint and seal
JPS53112820U (fr) * 1977-02-17 1978-09-08
JPS5563485U (fr) * 1978-10-25 1980-04-30
JPS61101180U (fr) * 1984-12-10 1986-06-27
EP0259765A1 (fr) * 1986-09-11 1988-03-16 Dyckerhoff & Widmann Aktiengesellschaft Eléments préfabriqués en béton ou en béton armé
JPH02124390U (fr) * 1989-03-24 1990-10-12
JP2002048489A (ja) * 2000-08-02 2002-02-15 Inax Corp 管と管板とのシール構造
JP2010210056A (ja) * 2009-03-12 2010-09-24 Ebara Corp ルーズ短管式管継手およびポンプ機構
US20140265157A1 (en) * 2013-03-14 2014-09-18 S. Bravo Systems, Inc. Sump wall penetration fitting for flexible piping

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348850A (en) * 1967-01-27 1967-10-24 Michael J Scales Pipe joint and seal
JPS53112820U (fr) * 1977-02-17 1978-09-08
JPS5563485U (fr) * 1978-10-25 1980-04-30
JPS61101180U (fr) * 1984-12-10 1986-06-27
EP0259765A1 (fr) * 1986-09-11 1988-03-16 Dyckerhoff & Widmann Aktiengesellschaft Eléments préfabriqués en béton ou en béton armé
JPH02124390U (fr) * 1989-03-24 1990-10-12
JP2002048489A (ja) * 2000-08-02 2002-02-15 Inax Corp 管と管板とのシール構造
JP2010210056A (ja) * 2009-03-12 2010-09-24 Ebara Corp ルーズ短管式管継手およびポンプ機構
US20140265157A1 (en) * 2013-03-14 2014-09-18 S. Bravo Systems, Inc. Sump wall penetration fitting for flexible piping

Also Published As

Publication number Publication date
JP2017101725A (ja) 2017-06-08

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