WO2022131168A1 - Électropompe à stator chemisé - Google Patents

Électropompe à stator chemisé Download PDF

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Publication number
WO2022131168A1
WO2022131168A1 PCT/JP2021/045657 JP2021045657W WO2022131168A1 WO 2022131168 A1 WO2022131168 A1 WO 2022131168A1 JP 2021045657 W JP2021045657 W JP 2021045657W WO 2022131168 A1 WO2022131168 A1 WO 2022131168A1
Authority
WO
WIPO (PCT)
Prior art keywords
connecting pipe
pipe
pump
flange
impeller
Prior art date
Application number
PCT/JP2021/045657
Other languages
English (en)
Japanese (ja)
Other versions
WO2022131168A9 (fr
Inventor
銀春 曹
直毅 下山
伸昭 内海
Original Assignee
三相電機株式会社
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 三相電機株式会社 filed Critical 三相電機株式会社
Priority to JP2022569954A priority Critical patent/JPWO2022131168A1/ja
Priority to KR1020237021407A priority patent/KR20230107881A/ko
Priority to CN202180083862.3A priority patent/CN116583672A/zh
Publication of WO2022131168A1 publication Critical patent/WO2022131168A1/fr
Publication of WO2022131168A9 publication Critical patent/WO2022131168A9/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
    • 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
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
    • F16L23/026—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes by welding

Definitions

  • the present invention relates to a canned motor pump, and more particularly to a high lift type canned motor pump in which impellers are arranged at both ends of a rotating shaft.
  • each impeller is provided at both ends in the axial direction of the motor, and each pump casing is an L-shaped communication pipe that forms a flow path when liquid is sent from one pump casing to the other pump casing.
  • Communicated canned motor pumps are known (see, eg, Patent Document 1).
  • the present invention has been devised in view of the above problems, and is a connecting pipe (connecting pipe) between the discharge port of the upper pump section and the suction port of the lower pump section provided apart from each other on both sides in the axial direction. It is an object of the present invention to provide a high lift type canned motor pump which can be suitably piped by a flange connection.
  • the canned motor pump according to the first aspect of the present invention is a discharge of a first pump composed of a rotating shaft, first impellers and second impellers provided at both ends of the rotating shaft, and the first impeller. It is a canned motor pump including a port, a suction port of a second pump configured by the second impeller, and an L-shaped connecting pipe connecting the discharge port and the suction port. Pump flanges are provided at the discharge port of the first pump configured by the first impeller and the suction port of the second pump configured by the second impeller, and the connecting pipe is connected to the L-shaped connecting pipe.
  • the canned motor pump according to the second aspect of the present invention is the canned motor pump according to the first aspect, in which the connecting pipe includes the L-shaped connecting pipe and the pump flange of the pipe flange at one end or both ends thereof. Has a fixed weld point between the inner diameter side of the surface opposite to the connection seal surface of the above, and a seal weld point between both end faces of the L-shaped connecting pipe and the inner peripheral surface of each of the pipe flanges. Has.
  • the canned motor pump according to the third aspect of the present invention is the canned motor pump according to the first aspect, in which the connecting pipe includes the connecting pipe and a pipe flange attached to the end of the pipe via an elastic material. To prepare for.
  • the canned motor pump according to the fourth aspect of the present invention is the canned motor pump according to the third aspect.
  • a character-shaped notch is formed, and the elastic material is formed in a substantially U-shaped cross section and an annular shape that opens on the side opposite to the connection seal surface of the connecting pipe, and is formed in an annular shape of the connecting pipe of the elastic material.
  • the inside of the end portion opposite to the connection seal surface is hermetically welded to the connecting pipe, and the outside of the end portion of the elastic material opposite to the connection seal surface of the connecting pipe is hermetically welded to the pipe flange.
  • the canned motor pump according to the fifth aspect of the present invention is the canned motor pump according to the third aspect.
  • a character-shaped notch is formed, and the elastic material expands while extending from the fitting portion fitted to the outer peripheral surface of the tip of the connecting pipe to the side opposite to the connecting side of the connecting pipe. It has a diameter-expanded portion, the end of the fitting portion and the end of the connecting pipe are hermetically welded, and the end of the diameter-expanded portion and the pipe flange are hermetically welded.
  • the canned motor pump according to the sixth aspect of the present invention is the canned motor pump according to the third aspect.
  • a character-shaped notch is formed, and the elastic material has a diameter from a fitting portion fitted to the outer peripheral surface of the tip of the connecting pipe and an end portion of the fitting portion opposite to the connecting side of the connecting pipe. It has an extension portion extending outward in the direction, and the end portion of the fitting portion and the end portion of the connecting pipe are hermetically welded, and the end portion of the extension portion and the notch of the pipe flange are provided.
  • the part is hermetically welded
  • the canned motor pump according to the seventh aspect of the present invention has an annular shape and a substantially L-shaped cross section on the inner diameter side of the surface opposite to the connection seal surface on the pipe flange of the connecting pipe.
  • a notch is formed, and the elastic material is formed in the radial direction from the fitting portion fitted to the outer peripheral surface of the tip of the connecting pipe and the end portion of the fitting portion opposite to the connecting side of the connecting pipe. It has an extending portion extending outward and a pipe extending portion extending from the radial outer end portion of the radial extending portion toward the side opposite to the connecting side of the pipe.
  • the end of the fitting portion and the end of the connecting pipe are hermetically welded, and the end of the extension in the pipe direction and the pipe flange are hermetically welded.
  • a connecting pipe (connecting pipe) can be suitably piped between the discharge port of the upper pump section and the suction port of the lower pump section provided apart from each other on both sides in the axial direction by flange connection. It is possible to provide a high-lift canned motor pump that can be used.
  • the can motor pump 8 in the present embodiment is characterized by a piping structure.
  • the pump structure 1 will be described, and then the piping structure, the piping method thereof, and the piping member Y will be described.
  • the pump structure 1 is composed of a rotating shaft 2, a bearing 3, a bearing support member 4, an impeller 6, a motor 11, a rotor 12, a pump casing 16, and the like.
  • the can motor pump 8 includes a motor 11 and a pump unit 31 driven by the motor 11.
  • the motor 11 is a canned motor including a rotor 12 having a magnet 27 and a stator 13 provided on the outer periphery of the rotor 12, and a rotary shaft 2 to which the rotor 12 is fixed is attached to a bearing housing 32 on the casing side. It is supported by the bearing 3 via the sleeve 25.
  • the pump unit 31 includes an impeller 6 fixed to the rotating shaft 2 and a pump casing 16 having an impeller accommodating space 14 accommodating the impeller 6.
  • the rotor 12 of the motor 11 is housed inside the stator can 9.
  • the stator 13 of the motor 11 is housed between the outer peripheral surface 17 of the stator can 9 and the inner peripheral surface 19 of the cylindrical motor frame 18 containing the stator can 9 at a position corresponding to the rotor 12 in the stator can 9.
  • the stator can 9 and the stator side plates 10 provided at both ends of the motor frame 18 are hermetically connected by welding.
  • the motor frame 18 and the stator side plates 10 provided at both ends of the motor frame 18 are sealed with an O-ring 5 and then sealed and connected by partial welding.
  • stator side plate 10 and the casing side bearing housing 32 seal the internal space 91 with O-rings 15 arranged at both ends of the stator side plate 10.
  • the pump casing 16 and the casing-side bearing housing 32 are sealed with an impeller accommodating space 14 by O-rings 20 arranged at both ends of the casing-side bearing housing 32.
  • the stator can 9 is formed by rolling a thin metal plate into a cylindrical shape, and has relatively low rigidity with respect to internal pressure among the parts constituting the can motor pump 8.
  • the portion of the stator 13 in contact with the stator core 21 is assisted in rigidity by the stator core 21.
  • the rigidity of the stator can 9 with respect to the pressure in the radial direction is low. Therefore, when the inside of the stator can 9 becomes high pressure, the stator can 9 may swell and be deformed. Therefore, the portion on the outer peripheral surface 17 of the stator can 9 without the stator core 21 is covered with a cylindrical support can 22 along the outer peripheral surface 17 of the stator can 9 in order to assist the rigidity.
  • the sum of the minimum allowable dimension of the axial dimension of the stator core 21 of the stator 13 and the minimum allowable dimension of the axial dimension of the support can 22 provided on each side of the stator core 21 in the axial direction is the sum of the motor frame. It was set smaller than the maximum allowable dimension of the axial dimension of 18. Therefore, the outer peripheral surface 17 of the stator can 9 has a portion that is not supported by either the stator core 21 or the support can 22, and there is a possibility that the portion is deformed.
  • the minimum allowable dimension of the axial dimension of the stator core 21 of the stator 13 and the minimum allowable dimension of the axial dimension of the support can 22 provided on both sides of the stator core 21 in the axial direction are the same.
  • the sum is set to be larger than the maximum allowable dimension of the axial dimension of the motor frame 18. Therefore, the outer peripheral surface 17 of the stator can 9 does not have a portion that is not supported by the stator core 21 or the support can 22, and is not partially deformed by the internal pressure.
  • the motor 11 includes a rotor 12 and a stator 13.
  • the rotor 12 includes a rotor can 23, a rotor side plate 24, a rotor main body 26, a magnet 27, a yoke 28, and the like.
  • the rotor 12 is fixed to the rotating shaft 2 so as to rotate integrally with the rotating shaft 2, and the rotating shaft 2 is supported by a bearing 3 attached to the casing-side bearing housing 32 via a sleeve 25.
  • the rotor 12 includes a rotor main body 26 fixed to the rotating shaft 2, a yoke 28 supported by the rotor main body 26, a magnet 27, a rotor side plate 24, and a rotor can 23.
  • the rotor can 23 is joined to the rotor main body 26 and the rotor side plate 24 by welding, and the magnet 27 and the yoke 28 are sealed.
  • the rotor 12 is housed inside the stator can 9 in the can motor pump 8.
  • the stator 13 is arranged at a position corresponding to the rotor 12 in the stator can 9, and is between the outer peripheral surface 17 of the stator can 9 and the inner peripheral surface 19 of the cylindrical motor frame 18 containing the stator can 9. Is housed in.
  • the stator 13 is composed of an electromagnetic coil 29 or the like, and when a drive current is supplied to the stator 13, the rotor 12 and the rotary shaft 2 are rotationally driven.
  • the rotor 12 of the motor 11 is fixed to the rotating shaft 2, and the rotary shaft 2 rotates integrally with the rotor 12 of the motor 11.
  • the bearing 3 is fitted into a casing-side bearing housing 32 provided in the pump portion 31 via an elastic thin plate member 33, and the rotating shaft 2 is fitted in a direction perpendicular to the axial direction. Supports rotatably.
  • the bearing 3 has a cylindrical shape, and a groove 37 for flowing liquid is provided in the axial end surface 34 and the inner peripheral wall 36 of the bearing 3.
  • SiC silicon carbide
  • the bearing 3 is arranged on the outer periphery of the sleeve 25 which constitutes a part of the rotating shaft 2.
  • the material of the sleeve 25 a material having excellent heat resistance and durability is used as in the case of the bearing 3.
  • Bearings 3 are provided on both sides of the rotor 12 of the motor 11 in the axial direction of the rotating shaft 2, and rotatably support the rotating shaft 2 in the direction perpendicular to the axial direction.
  • first bearing 41 or “second bearing 42”, respectively.
  • the bearing 3 is fitted in the casing side bearing housing 32.
  • the casing-side bearing housing 32 is provided in the pump portion 31.
  • the casing side bearing housing 32 is provided on both sides of the rotor 12 of the motor 11 in the axial direction of the rotating shaft 2.
  • the two casing-side bearing housings 32 are referred to as “first casing-side bearing housing 43" and “second casing-side bearing housing 44,” respectively.
  • the elastic thin plate material 33 As the elastic thin plate material 33, a tolerance ring is used in this embodiment. Since the bearing 3 is fitted into the casing-side bearing housing 32 via the elastic thin plate material 33, rattling of the bearing 3 with respect to the casing-side bearing housing 32 is prevented, and between the casing-side bearing housing 32 and the bearing 3. The difference in thermal expansion coefficient is absorbed.
  • the rotating shaft 2 and the rotor 12 are provided with a bearing support member housing 48 for accommodating the bearing support member 4. Then, the bearing support member 4 is fitted into the bearing support member housing 48 via the elastic thin plate member 35 for the bearing support member.
  • the bearing support member housing 48 is fixed in the axial direction relative to the rotating shaft 2, and the bearing support member 4 is also axially relative to the rotating shaft 2 via the bearing support member housing 48. It is fixed to. Therefore, the rotating shaft 2 is axially supported by the bearing 3 via the bearing support member 4 and the bearing support member housing 48.
  • the bearing support member 4 is also provided on both sides of the rotor 12 of the motor 11 in the axial direction of the rotating shaft 2. Specifically, the bearing support member 4 is axially fixed with respect to the rotating shaft 2 between the rotor 12 of the motor 11 and the bearing 3, and is rotatably supported in the axial direction by the bearing 3.
  • the material of the bearing support member 4 for example, SiC having excellent heat resistance and durability is used.
  • first bearing support member 49 the bearing support member 4 supported by the first bearing 41
  • second bearing support member 51 the bearing support member 4 supported by the second bearing 42
  • the impeller 6 rotates integrally with the rotating shaft 2.
  • the impeller 6 includes a cylindrical impeller wing portion 52 fixed to the rotating shaft 2 and an annulus plate-shaped impeller wing portion 53 connected to the impeller boss portion 52.
  • the imperabos portion 52 has a cylindrical shape and a rotating shaft fixing portion 58 for fixing the imperabos portion 52 to the rotating shaft 2, and a circle extending in the radial direction from the outer peripheral surface of the rotating shaft fixing portion 58. It has an impeller blade connecting portion 61 which is in the shape of a ring plate and is connected to the impeller blade portion 53, and is connected to the rotation center side end portion 54 of the impeller blade portion 53 at the impeller blade connecting portion 61.
  • the impeller blade connecting portion 61 of the impeller blade portion 52 is provided with an impeller blade portion through hole 62 penetrating in the axial direction.
  • the liquid sent back from the stator can 9 side passes through the imperabos portion through hole 62.
  • the impeller blade connecting portion 61 of the impeller blade portion 52 is provided with an annular impeller blade protruding piece 63 for preventing backflow of liquid.
  • the impeller blade protrusion piece 63 extends from the impeller blade connecting portion 61 side to the stator can 9 side.
  • the imperabos portion protrusion piece 63 is inserted into an annular recess 66 formed in the inner wall surface 64 of the pump casing 16.
  • one pump unit 31 is provided at both ends of the stator can 9 in the axial direction.
  • one pump unit 31 will be referred to as a first pump 1303 provided with a first impeller 67 and a first pump casing 74
  • the other pump portion 31 will be referred to as a second pump 1304 provided with a second impeller 71 and a second pump casing 77. ..
  • a first inflow port 76 is provided on the side surface of the first pump casing 74 in which the first impeller 67 is housed. Further, on the upper surface of the first pump casing 74, a liquid feeding port 78 for sending the liquid flowing into the first pump casing 74 to the second pump casing 77 is provided.
  • the bearing housing 43 on the first casing side has a first communication passage 92 that communicates the first impeller accommodating space 84 and the internal space 91 of the stator can 9.
  • the first continuous passage 92 is a wall surface 86 on the stator can 9 side of the first impeller accommodating space 84, and is near the first impeller portion through hole 88 at a position closer to the rotation axis 2 than the first impeller portion protrusion piece 87.
  • the first continuous passage opening 89 is provided in.
  • the first casing-side bearing housing 43 has a first impeller accommodating space 84 accommodating the first impeller 67, and a first recess 104 provided on the wall surface 86 on the stator can 9 side in the first impeller accommodating space 84. ..
  • a protrusion piece 87 of the first imperabos portion provided in the first imperabos portion 68 is inserted into the first recess 104.
  • first impeller blade portion 69 is provided with a cylindrical first closing plate 108 extending in the axial direction of the rotating shaft 2 in the direction of the first inflow port 76 and having a coaxial center with the rotating shaft 2.
  • the outer peripheral surface of the first closing plate 108 reduces the gap between the first pump casing 74 and the inner wall 107 of the first inflow port 76.
  • the first block plate 108 is a space formed by a space at the first inflow port 76, an outer wall 109 on the side of the first block plate 108 at the first impeller blade portion 69, and an inner wall 75 of the first pump casing 74. Block the space.
  • the second impeller 71 which is the other impeller 6, has a second impeller wing portion 72 fixed to the rotation shaft 2 and a second impeller wing portion 73 connected to the second impeller wing portion 72.
  • the second imperabos portion 72 is provided with an annular second imperabos portion protrusion piece 96 extending in the axial direction and extending toward the stator can 9.
  • a second cylinder On the side surface of the second pump casing 77 in which the second impeller 71 is housed, a second cylinder having a rotary shaft 2 and a coaxial central axis and inflowing the liquid feed sent from the first impeller 67.
  • An inflow port 79 is provided on the upper surface side of the second pump casing 77.
  • a discharge port 81 is provided to discharge the liquid sent into the second pump casing 77 to the outside of the second pump casing 77.
  • the bearing housing 44 on the second casing side has a second communication passage 99 that communicates the second impeller accommodating space 93 and the internal space 91 of the stator can 9.
  • a second passage opening 98 is provided in the vicinity.
  • the second casing-side bearing housing 44 is provided on the second impeller accommodating space 93 accommodating the second impeller 71 and the wall surface 94 on the stator can 9 side of the second impeller accommodating space 93, and is provided on the second impeller section 72. It has a second recess 106 into which the second impeller boss projection piece 96 is inserted.
  • the second impeller blade portion 73 is provided with a cylindrical second closing plate 1102 extending in the axial direction of the rotating shaft 2 toward the second inflow port 79 and having a coaxial center with the rotating shaft 2.
  • the outer peripheral surface of the second closing plate 1102 reduces the gap between the second pump casing 77 and the inner wall 1101 of the second inflow port.
  • the second blocking plate 1102 is a space formed by the space at the second inflow port 79, the outer wall 1103 on the second closing plate 1102 side in the second impeller blade portion 73, and the inner wall 80 of the second pump casing 77. Block the space.
  • the first pump casing 74 and the second pump casing 77 are connected by a connecting pipe 83 that forms a flow path for sending a liquid from the first impeller 67 to the second impeller 71.
  • the connecting pipe 83 passes through the outside of the motor frame 18 and sends the liquid discharged from the liquid feed port 78 of the first pump casing 74 to the second inflow port 79 of the second pump casing 77.
  • the liquid sent from the first inflow port 76 into the first pump casing 74 passes through the first impeller blade inner flow path 101 of the first impeller 67 by the rotational force of the first impeller 67, and passes through the connecting pipe 83. Then, it flows into the second pump casing 77 from the second inflow port 79.
  • the liquid flowing into the second pump casing 77 branches in two directions.
  • One of the branched liquids is discharged from the discharge port 81 to the outside of the second pump casing 77 through the second impeller blade inner flow path 102 of the second impeller 71 by the rotational force of the second impeller 71.
  • the other branched liquid passes through the second impeller labus portion through hole 97 of the second impeller 71 and is sent into the stator can 9.
  • the liquid sent from the second pump casing 77 into the stator can 9 further branches in two directions.
  • One of the further branched liquids passes through the second passage 99 provided in the second pump casing 77, and passes through the space between the stator can 9 and the rotor 12 toward the first bearing 41. ..
  • the other liquid that has further branched passes between the sleeve 25 of the rotating shaft 2 and the second bearing 42.
  • the liquid that has passed between the sleeve 25 of the rotary shaft 2 and the second bearing 42 passes between the second bearing 42 and the second bearing support member 51, and is between the stator can 9 and the rotor 12. It passes through the space toward the first bearing 41.
  • the liquid passes between the sleeve 25 of the rotary shaft 2 and the second bearing 42 and when the liquid passes between the second bearing 42 and the second bearing support member 51, the liquid is mainly the second bearing. It passes through the second bearing groove 103 formed in 42.
  • the liquid passes between the sleeve 25 of the rotary shaft 2 and the second bearing 42 and between the second bearing 42 and the second bearing support member 51, the liquid is the sleeve 25 and the second bearing of the rotary shaft 2. It serves as a lubricant between the bearing 42 and between the second bearing 42 and the second bearing support member 51.
  • One of the branched liquids passes through the first continuous passage 92 of the first pump casing 74 and the first impeller section through hole 88 of the first impeller section 68 and enters the first impeller blade inner flow path 101 of the first impeller 67. come in.
  • the other branched liquid passes between the first bearing 41 and the first bearing support member 49, and passes between the first bearing 41 and the sleeve 25 of the rotary shaft 2.
  • the liquid passes between the first bearing 41 and the first bearing support member 49, and when the liquid passes between the first bearing 41 and the sleeve 25 of the rotary shaft 2, the liquid is mainly the first.
  • the liquid passes through the first bearing groove 105 formed in the bearing 41.
  • the liquid passes between the first bearing 41 and the first bearing support member 49, and when it passes between the first bearing 41 and the sleeve 25 of the rotary shaft 2, the liquid is the first bearing 41. It serves as a lubricant between the first bearing support member 49 and between the first bearing 41 and the sleeve 25 of the rotary shaft 2.
  • the liquid feed that has passed between the first bearing 41 and the sleeve 25 of the rotary shaft 2 passes through the first impeller section through hole 88 of the first impeller section 68 and flows through the first impeller blade of the first impeller 67. Enter 101.
  • the first pump casing 74 and the connecting pipe 83 are connected to each other via a first discharge flow path 1104 provided on the secondary side of the liquid feed port 78 on the upper surface side of the first pump casing 74. ing.
  • the first discharge flow path 1104 and the connecting pipe 83 are connected by fastening the flanges provided at the ends facing each other with bolts.
  • the flange provided at the end of the first discharge flow path 1104 on the connecting pipe 83 side is the first pump flange 1106, and the flange provided at the end of the connecting pipe 83 on the first discharge flow path 1104 side is the first pipe.
  • the flange is 1107.
  • the first discharge flow path 1104 is an L-shape having one side extending vertically upward from the liquid feeding port 78 and the other side extending in the axial direction of the rotating shaft 2 toward the second pump casing 77.
  • the first discharge flow path 1104 may be configured by connecting to the first pump casing 74 by a separate component.
  • the second pump casing 77 and the connecting pipe 83 are connected to each other via a second suction flow path 1108 provided on the primary side of the second inflow port 79 in the second pump casing 77.
  • the second suction flow path 1108 and the connecting pipe 83 are connected by fastening the flanges provided at the ends facing each other with bolts.
  • the flange provided at the end of the second suction flow path 1108 on the connecting pipe 83 side is the second pump flange 1109, and the flange provided at the end of the connecting pipe 83 on the second suction flow path 1108 side is the second pipe.
  • the flange is 1201.
  • the second suction flow path 1108 is an L-shape having one side extending from the second inflow port 79 in the axial direction of the rotating shaft 2 and the other side extending vertically upward from there.
  • the second suction flow path 1108 may also be configured by being connected to the second pump casing 77 by a separate part.
  • the piping structure of the can do motor pump and the piping method thereof according to the present embodiment will be described.
  • the can motor pump 8 As shown in FIG. 1, the canned motor pump 8 includes a rotary shaft 2, a first impeller 67 and a second impeller 71, a discharge port 1301, a suction port 1302, an L-shaped connecting pipe 83, and the like.
  • the first impeller 67 and the second impeller 71 are provided at both ends of the rotating shaft 2, respectively.
  • the first impeller 67 constitutes a first pump 1303 provided at one end of the rotating shaft 2.
  • the second impeller 71 constitutes a second pump 1304 provided at the other end of the rotating shaft 2.
  • the discharge port 1301 is provided in the first pump 1303.
  • the first pump 1303 sends the liquid to the second pump 1304 via the discharge port 1301 by the rotational force of the first impeller 67.
  • the discharge port 1301 is integrated with the first pump casing 74 by the liquid feed port 78 formed on the upper surface side of the first pump 1303 and the first discharge flow path 1104 provided on the secondary side of the liquid feed port 78. Is formed.
  • the flange attached to the discharge port 1301 is referred to as "first pump flange 1106".
  • the suction port 1302 is provided in the second pump 1304.
  • the second pump 1304 discharges the liquid sucked from the suction port 1302 from the discharge port 81 of the canned motor pump 8 by the rotational force of the second impeller 71.
  • the suction port 1302 has a second pump casing 77 due to a second inflow port 79 formed on the axial side surface side of the second pump 1304 and a second suction flow path 1108 provided on the primary side of the second inflow port 79. It is formed integrally with.
  • the flange attached to the suction port 1302 is referred to as "second pump flange 1109".
  • the connecting pipe 83 is an L-shaped pipe that connects (communicates) the discharge port 1301 and the suction port 1302.
  • the flange for the connecting pipe 83 bolted to the first pump flange 1106 is referred to as "first pipe flange 1107”
  • the flange for the connecting pipe 83 fastened to the second pump flange 1109 is referred to as "second pipe flange 1201”. That is.
  • the first pipe flange 1107 and the first pump flange 1106 are bolted together, and the second pipe flange 1201 and the second pump flange 1109 are bolted together.
  • the connecting pipe 83 is detachable from the can motor pump 8.
  • the first pump flange 1106 and the second pump flange 1109 shown in FIGS. 6 and 7 are in a state where the dimensional tolerances are not accumulated, but when the dimensional tolerances are accumulated, the first pipe flange 1107 and the first pipe flange 1107 in the connecting pipe 83 are formed. 2 Misalignment with the pipe flange 1201 occurs. Specifically, at the center of each connection seal surface of the first pump flange 1106 and the second pump flange 1109, three axes in directions perpendicular to each other are represented as an x-axis, a y-axis, and a z-axis.
  • the connecting pipe 83 may be displaced in any of the x-axis, y-axis, and z-axis directions. Further, a deviation may occur in any of the rotation directions ⁇ x, ⁇ y, and ⁇ z.
  • both ends of the connecting pipe 83 are inserted into the first pipe flange 1107 and the second pipe flange 1201, respectively, and the flange attached to the discharge port 1301. Only the first pipe flange 1107 is fastened to 1106 using bolts 1306. Similarly, the second pipe flange 1201 is fastened to the flange 1109 attached to the suction port 1302 by using the bolt 1306.
  • the connecting pipe 83 is fixedly welded to the first pipe flange 1107 and the second pipe flange 1201.
  • reference numeral 1307 indicates a fixed welded portion.
  • Fixed welding is welding that is partially performed on the part to be joined. Fixed welding is performed between the contact sealing surface of the first pipe flange 1107 and the second pipe flange 1201 with the first pump flange 1106 and the second pump flange 1109 and the inner diameter side of the opposite surface.
  • the bolt 1306 of the first pipe flange 1107 is released from the flange 1106 attached to the discharge port 1301, and the flange 1306 attached to the suction port 1302 is released.
  • the bolt 1306 of the second pipe flange 1201 is released from the fastening to the pump flange 1109, and the connecting pipe 85 is removed.
  • both ends of the connecting pipe 83 are hermetically welded to the first pipe flange 1107 and the second pipe flange 1201 as shown in FIG. 8C.
  • reference numeral 1308 indicates a sealed welded portion. Sealed welding is welding performed on all the parts to be joined, and seals the gap between both ends of the connecting pipe 83 and the first pipe flange 1107 and the second pipe flange 1201. Seal welding is performed over the entire circumference between the end face portion of the connecting pipe 83 and the inner peripheral surface of the first pipe flange 1107 and the second pipe flange 1201.
  • first pipe flange 1107 is fastened to the first pump flange 1106 using bolts 1306, and the second pipe flange 1201 is fastened to the second pump flange 1109 using bolts 1306.
  • the connecting pipe 85 can be suitably flange-connected to the second pump flange 1109.
  • the "connecting pipe structure of the canned motor pump” may be used only at one end of the connecting pipe 85. When it is used only at one end, the number of steps is smaller than when it is used at both ends, so it is easier to connect the connecting pipe 85 between the first pump flange 1106 and the second pump flange 1109. Can be done.
  • the connecting pipe 85 since the connecting pipe 85 is firmly fixed to the first pump flange 1106 and the second pump flange 1109, the connecting pipe 83 can be used as a handle when holding the canned motor pump 8. It can also be used.
  • the connecting pipe 85A is attached to both ends of the L-shaped connecting pipe 83A via an elastic material 1309 in addition to the L-shaped connecting pipe 83A. It further includes one pipe flange 1107A and a second pipe flange 1201A.
  • the elastic material 1309 is formed in a U-shaped cross section and an annular shape that opens on the side opposite to the connecting side of the connecting pipe 83A.
  • the first pipe flange 1107A and the second pipe flange 1201A are formed with an annular and substantially L-shaped notch 1401 on the inner diameter side of the surface opposite to the flange connecting surface.
  • One end of the elastic material 1309 having a U-shaped cross section is welded and connected to the outer peripheral surface of the connecting pipe 83, and the other end is welded and connected to the notch 1401 having a substantially L-shaped cross section of the first pipe flange 1107 and the second pipe flange 1201A. ing.
  • first pipe flange 1107A and the second pipe flange 1201A are attached to the L-shaped pipe via the elastic material 1309, the first pipe flange 1107A and the second pipe flange 1201A are attached to the L-shaped pipe with respect to the L-shaped pipe. It can be displaced.
  • the first pipe flange 1107A and the second pipe flange 1201A are arranged at the fastening positions with respect to the pump flanges 1106 and 1109 while elastically deforming the elastic material 1309.
  • the first pipe flange 1107A and the second pipe flange 1201A are bolted to the pump flanges 1106 and 1109 attached to the discharge port 1301 and the suction port 1302.
  • the connecting pipe 85A can be suitably flange-connected to the second pump flange 1109.
  • the piping member Y is composed of a connecting pipe 83B (for example, an L-shaped pipe) and a flange attached to the end of the connecting pipe 83B via an elastic material 1309.
  • piping member Y As the piping member Y, four types of piping members Y1 to Y4 shown in FIGS. 10 to 13 are exemplified.
  • a notch 1401 having an annular shape and a substantially L-shaped cross section is formed on the pipe flanges 1107B and 1201B on the inner diameter side of the surface opposite to the connection seal surface.
  • the elastic material 1309 has a substantially U-shaped cross section and is formed in an annular shape, which is open on the side opposite to the connection seal surface of the connecting pipe 85B.
  • the inside of the end of the elastic material 1309 opposite to the connection seal surface of the connection pipe 85B is hermetically welded to the connection pipe 83B.
  • the outside of the end of the elastic material 1309 opposite to the connection seal surface of the connecting pipe 85B is welded to the pipe flanges 1107B and 1201B.
  • a notch 1401 having an annular shape and a substantially L-shaped cross section is formed on the pipe flanges 1107B and 1201B on the inner diameter side of the surface opposite to the connection seal surface.
  • the elastic material 1309 includes a fitting portion 1403 fitted to the outer peripheral surface of the tip of the connecting pipe 83B, and a diameter-expanded portion 1404 extending from the fitting portion 1403 to the side opposite to the connecting side of the connecting pipe 83B.
  • the end of the fitting portion 1403 and the end of the connecting pipe 83B are hermetically welded, and the end of the enlarged diameter portion 1404 and the pipe flanges 1107B and 1201B are hermetically welded.
  • notches 1401 having an annular shape and a substantially L-shaped cross section are formed on the pipe flanges 1107B and 1201B on the inner diameter side of the surface opposite to the connection seal surface.
  • the elastic material 1309 extends radially outward from the fitting portion 1403 fitted to the outer peripheral surface of the tip of the connecting pipe 83B and the end portion of the fitting portion 1403 opposite to the connecting side of the connecting pipe 83B. It has a protrusion 1406.
  • the end of the fitting portion 1403 and the end of the connecting pipe 83B are hermetically welded, and the end of the extension portion 1406 and the notch 1401 of the pipe flanges 1107B and 1201B are hermetically welded.
  • notches 1401 having an annular shape and a substantially L-shaped cross section are formed on the pipe flanges 1107B and 1201B on the inner diameter side of the surface opposite to the connection surface.
  • the elastic material 1309 has a diameter extending outward in the radial direction from the fitting portion 1403 fitted to the outer peripheral surface of the tip of the connecting pipe 83B and the end portion of the fitting portion 1403 opposite to the connecting side of the connecting pipe 83B. It has a directional extending portion 1407 and a pipe directional extending portion 1408 extending from the radial outer end portion of the radial extending portion 1407 toward the side opposite to the connecting side of the connecting pipe 83B.
  • the end of the fitting portion 1403 and the end of the connecting pipe 83 are hermetically welded, and the end of the pipe direction extending portion 1408 and the pipe flanges 1107B and 1201B are hermetically welded.
  • the piping member Y described above is not limited to the connecting pipe of the can motor pump 8, and can also be used as a piping member in various other technical fields.
  • the present invention can be applied to, for example, a can do motor pump for high pressure.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une électropompe à stator chemisé comprenant : un orifice d'évacuation (1301) d'une première pompe (1303) et un orifice d'aspiration (1302) d'une seconde pompe (1304) ; et un tuyau de raccordement de type "L" (85) qui relie l'orifice d'évacuation (1301) à l'orifice d'aspiration (1302), des brides de pompe (1106), (1109) sont disposées sur l'orifice d'évacuation (1301) et l'orifice d'aspiration (1302), le tuyau de raccordement (85) présente des brides de tuyau (1107), (1201), relie la bride de tuyau (1007) à la bride de pompe (1106), et relie la bride de tuyau (1201) à la bride de pompe (1109), et le tuyau de raccordement (85) peut être fixé/détaché.
PCT/JP2021/045657 2020-12-15 2021-12-10 Électropompe à stator chemisé WO2022131168A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2022569954A JPWO2022131168A1 (fr) 2020-12-15 2021-12-10
KR1020237021407A KR20230107881A (ko) 2020-12-15 2021-12-10 캔드 모터 펌프
CN202180083862.3A CN116583672A (zh) 2020-12-15 2021-12-10 屏蔽电泵

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-207336 2020-12-15
JP2020207336 2020-12-15

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WO2022131168A1 true WO2022131168A1 (fr) 2022-06-23
WO2022131168A9 WO2022131168A9 (fr) 2023-05-04

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PCT/JP2021/045657 WO2022131168A1 (fr) 2020-12-15 2021-12-10 Électropompe à stator chemisé

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JP (1) JPWO2022131168A1 (fr)
KR (1) KR20230107881A (fr)
CN (1) CN116583672A (fr)
WO (1) WO2022131168A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48103957A (fr) * 1972-03-09 1973-12-26
DE2549282A1 (de) * 1975-11-04 1977-05-05 Wilhelm Schulz Rohrflanschverbindung
JPS5286702U (fr) * 1975-12-24 1977-06-28
JPS60107687U (ja) * 1983-12-26 1985-07-22 株式会社　水研 管接合部の離脱防止用継手金具
JPS6464536A (en) * 1987-09-04 1989-03-10 Shintouyou Kikai Kogyo Kk Canned motor pump
JP2004332666A (ja) * 2003-05-09 2004-11-25 Shimadzu Corp 圧縮装置
JP2008025373A (ja) * 2006-07-18 2008-02-07 Nikkiso Co Ltd キャンドモータポンプ
JP2018513336A (ja) * 2015-04-17 2018-05-24 エヴァフォード・ワン・プロプリエタリィ・リミテッド パイプフランジ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11308800A (ja) 1998-04-22 1999-11-05 Nikkiso Co Ltd キャンドモータポンプ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48103957A (fr) * 1972-03-09 1973-12-26
DE2549282A1 (de) * 1975-11-04 1977-05-05 Wilhelm Schulz Rohrflanschverbindung
JPS5286702U (fr) * 1975-12-24 1977-06-28
JPS60107687U (ja) * 1983-12-26 1985-07-22 株式会社　水研 管接合部の離脱防止用継手金具
JPS6464536A (en) * 1987-09-04 1989-03-10 Shintouyou Kikai Kogyo Kk Canned motor pump
JP2004332666A (ja) * 2003-05-09 2004-11-25 Shimadzu Corp 圧縮装置
JP2008025373A (ja) * 2006-07-18 2008-02-07 Nikkiso Co Ltd キャンドモータポンプ
JP2018513336A (ja) * 2015-04-17 2018-05-24 エヴァフォード・ワン・プロプリエタリィ・リミテッド パイプフランジ

Also Published As

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WO2022131168A9 (fr) 2023-05-04
CN116583672A (zh) 2023-08-11
KR20230107881A (ko) 2023-07-18
JPWO2022131168A1 (fr) 2022-06-23

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