WO1999030040A1 - Dispositif de pompage forme par traitement de feuille metallique - Google Patents

Dispositif de pompage forme par traitement de feuille metallique Download PDF

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Publication number
WO1999030040A1
WO1999030040A1 PCT/JP1997/004484 JP9704484W WO9930040A1 WO 1999030040 A1 WO1999030040 A1 WO 1999030040A1 JP 9704484 W JP9704484 W JP 9704484W WO 9930040 A1 WO9930040 A1 WO 9930040A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
motor
casing
impeller
sheet metal
Prior art date
Application number
PCT/JP1997/004484
Other languages
English (en)
Japanese (ja)
Inventor
Yukimasa Nakatsukasa
Original Assignee
Ebara Corporation
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 Corporation filed Critical Ebara Corporation
Priority to AU51382/98A priority Critical patent/AU5138298A/en
Priority to PCT/JP1997/004484 priority patent/WO1999030040A1/fr
Publication of WO1999030040A1 publication Critical patent/WO1999030040A1/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4266—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps made of sheet metal

Definitions

  • the present invention relates to a sheet-metal-worked pump device comprising an integral motor portion and a pump portion and having an impeller rotated by a motor in a pump casing.
  • the pump device is made of sheet metal to reduce the weight.
  • the sheet metal such as stainless steel
  • Another object of the present invention is to prevent the deformation of the cover casing and prevent the mechanical seal that seals the rotating shaft from being unable to seal.
  • Another object of the present invention is to prevent deformation of the venturi tube communicating with the suction port, to prevent the 0-ring provided at that portion from falling off, and to prevent liquid leakage.
  • Yet another object of the present invention is to provide a liner that works effectively in the event of pressure fluctuations, thereby reducing the amount of leakage between the impeller and the casing and preventing seizure of the liner ring. is there.
  • Still another object of the present invention is to provide a sheet metal processed pump device capable of easily forming an air vent hole for discharging air near the center of the impeller.
  • Still another object of the present invention is to provide a multi-stage pump capable of shortening the axial length of a multi-stage pump.
  • the present invention provides a pump device that has been improved. Disclosure of the invention
  • the motor part and the pump part integrally comprised,
  • the impeller which rotates by a motor in pump casing is provided, and the rotating shaft is sealed by the mechanical seal supported by the cover casing.
  • the inside of the cover casing in the radial direction is supported by a support member fixed to the motor side, thereby preventing axial deformation to the motor side.
  • an impeller which is constituted by a motor portion and a pump portion integrally formed, is provided in a pump casing and is rotated by a motor, and a suction port provided in the suction casing is connected to the impeller via a venturi tube.
  • the suction casing In a sheet metal machined pump device communicating with the inlet, the suction casing has a guide portion extending inward at the suction port, the guide portion engaging the inside of the bench lily tube, and the bench lily.
  • a 0-ring is housed in a step formed at the tip of the tube, and a stopper is provided outside the 0-ring.
  • a motor part and a pump part which are integrally formed are provided, an impeller rotated by a motor is provided in the pump casing, and a liner is provided between the impeller and the casing part.
  • the liner was provided with a U-shaped cross-section liner with the high-pressure side open, and the flange portion radially outward of the liner was attached to a step formed in the casing part. Attached to the liner holder, the inner radial flange is provided with a lip, and the outer radial flange and the inner radial flange are connected by an appropriate number of ribs. I have.
  • a pump unit includes an integral motor portion and a pump portion, the pump casing includes an impeller that is rotated by the motor, and the rotating shaft is supported by the cover casing.
  • an impeller is provided with an air vent hole, and the impeller is mounted on a boss mounted on a rotating shaft, and the air vent is a radius of the boss. It is partially covered by a flange that extends outward in the direction.
  • a plurality of impellers each of which includes a motor portion and a pump portion, which are integrally formed, is provided in a pump casing and is rotated by a motor, and a guide vane and a passage are provided between the impellers.
  • a rectifying blade provided between the guide vane and the passage cover is fixed to the guide vane.
  • a sheet metal processed pump comprising a motor portion and a pump portion integrally formed, a plurality of impellers rotated by a motor in a pump casing, and a suction port and a discharge port are provided.
  • a volute is formed radially outward of the last stage impeller, and the discharge port communicates through the volute.
  • FIG. 1 is a side sectional view of a pump device embodying the present invention
  • FIG. 2 is a diagram illustrating an effect of the pump device shown in FIG. 1
  • FIG. 3 shows another modification of FIG.
  • FIG. 4 is a side sectional view showing another modified example of FIG. 1
  • FIG. 5 is a side sectional view showing another modified example of FIG. 1
  • FIG. 7 is an enlarged view of a Z part of FIG. 1
  • FIG. 8 is an enlarged view of FIG. 7, viewed from the right side
  • FIG. 9 is a view of a U of FIG.
  • FIG. 10 is an enlarged view of a portion
  • FIG. 10 is a view of FIG. 9 viewed from the direction of arrow V
  • FIG. 11 is a side sectional view showing one embodiment of a pump device using a number of impellers.
  • FIG. 1 shows a pump device embodying the present invention.
  • a pump device generally indicated by reference numeral A is composed of a pump portion P and a motor portion M, and the motor portion M is housed in a motor casing 1.
  • the motor 2 is provided, and the rotating shaft 3 is rotated.
  • the pump part P includes a pump casing 4 and a cover casing 5 provided on the motor portion M side of the pump casing 4, and is fixed in the pump casing 4 by the rotating shaft 3 and fixing means 10.
  • the rotating impeller 7 is housed. But The liquid sucked from the suction port 8 provided in the pump casing 4 is pressurized by the impeller 7 and discharged from the discharge port 9 provided in the pump casing 4.
  • the rotating shaft 3 that drives the impeller 7 is supported by a bearing 10 on the motor side at a location penetrating through the cover casing 5, and the pump side is sealed with a mechanical seal.
  • the central portion of the cover casing 5 is supported from the motor side by a support member, in the illustrated example, a thrust flange 12.
  • This thrust flange 12 is made of sheet metal and formed in a frusto-conical shape.
  • FIG. 2 is a diagram showing the effect of the present invention.
  • pressure is applied to the impeller 7 side of the cover casing 5, that is, the left side of the drawing. Therefore, the cover casing 5 moves to the motor side, that is, the right side in the drawing. Then, as shown in FIG. 2, the mechanical seal 11 cannot slide between the first component 11a and the second component 11b, and leakage occurs as shown by the symbol X.
  • the support member 12 since the support member 12 is provided, such a disadvantage does not occur.
  • FIG. 3 shows another embodiment of the present invention, which is an example in which a keyed boss 10 a is used as a fixing means of the impeller 7.
  • the other points are substantially the same as those in FIG.
  • FIG. 4 shows another embodiment of the present invention.
  • the supporting member 12A is configured by a protruding portion extending to the pump side of the front casing 15 of the module M.
  • the other points are substantially the same as the embodiment of FIG.
  • Each embodiment is effective for the cover casing 5 made of sheet metal.
  • FIG. 5 shows an example in which the support member 12A of FIG. 4 is used in the embodiment of FIG. Other points are substantially the same as those of the above-described embodiments.
  • FIG. 6 shows an enlarged view of the circle Y portion in FIG.
  • the suction port 8 is attached to the pump casing 4 by, for example, welding 20.
  • the pump casing 4 has a guide portion 6a which is bent inward at the suction port 8 and extends. 2 1 is engaged.
  • the chamber H 1 outside the bench lily tube 21, that is, the pump casing 4 communicates with the discharge port 9 and has a high pressure.
  • the chamber H 2 inside the bench lily tube 21 1 Is sucked by the impeller 7, so that the pressure is low.
  • a 0-ring 22 is provided to prevent leakage between chambers H1 and H2.
  • only the 0-ring 22 is provided, and the pressure of the chamber ⁇ 1 may deform the guide portion 6a inward in the radial direction and the 0-ring may fall off.
  • the pressure of the chamber ⁇ 1 may deform the guide portion 6a inward in the radial direction and the 0-ring may fall off.
  • a ring-shaped stopper 24 is fixed to the outside of the stepped portion 23 formed at the tip of the venturi tube 21, and the inner end 6 b of the guide portion 6 a is positioned inside the venturi tube 21. Along a predetermined length of one.
  • the 0-ring 22 can come off, but also sufficient sealing performance can be obtained at this portion.
  • the stopper 24 has an effect of receiving the high pressure of the chamber H2 and preventing the high pressure from being applied to the inner end 6b of the guide portion 6a. Therefore, it is effective for sheet metal casings. It should be noted that embodiments other than FIG. 1 can be similarly implemented.
  • a step portion 25a is formed in the casing portion 25 extending toward the boss portion of the impeller 7, and the step portion 25a has an L-shaped cross section.
  • a liner holder 26 is provided, and a rubber liner ring indicated generally by reference numeral 27 is attached to the liner holder 26.
  • the liner 27 has a U-shaped cross section, and its high-pressure side is open. Accordingly, the liner ring 27 is formed of the flange portion 27a attached to the liner ring holder 26, the web portion 27b extending radially inward from the flange portion 27a, and the web portion 27b.
  • the flange portion 27c has a lip portion 27d extending substantially perpendicularly from the radial inner edge.
  • an opening 28 is formed by the flange portions 27a and 27c and the web portion 27b, and when high-pressure water flows into the opening 28, the opening 28 expands, The lip portion 27 d comes into engagement with the impeller 7.
  • an appropriate number of ribs 29 are provided at angular intervals in the circumferential direction as shown in FIG. 8 to regulate the amount of deformation.
  • the linering 27 having a U-shaped cross section, leakage can be reduced and galling can be prevented. Therefore, it is very suitable for a deformable part such as a sheet metal casing or an impeller.
  • a deformable part such as a sheet metal casing or an impeller.
  • FIG. 9 is an enlarged view of a portion surrounded by a circle U in FIG. 3, and FIG. 10 is a view seen in the direction of arrow V in FIG.
  • an air layer Ai is likely to be formed in the chamber H3 between the impeller 7 and the cover casing 5 due to a difference in centrifugal force. It is known that an air vent hole 30 is provided at an appropriate position of the impeller 7 in order to remove the air layer Ai. The reason is that the mechanical seal 11 becomes dry touch due to the air layer Ai, and there is a risk of seizure.
  • the diameter of the air vent hole 30 is preferably about 2 mm, because if the air vent hole 30 is too large, the efficiency will decrease due to leakage.
  • the impeller 7 made of sheet metal it is easy to form a hole having a diameter of about 3.5 mm or more. However, that would make the hole too large and reduce efficiency. Therefore, in the present invention, the air vent hole 30 is configured to cover about half of the air vent hole 30 as shown in FIG. 10 by using the flange portion 10b that extends radially outward of the boss portion 10a of the impeller. is there. By doing so, the processing of the hole 30 is facilitated, and the air can be effectively exhausted.
  • the present invention can be applied not only to a single-stage pump but also to a multi-stage pump as in the above embodiment.
  • An example is shown in FIG. In FIG. 11, components corresponding to FIGS. 1, 3, 4, and 5 are denoted by the same reference numerals.
  • a first-stage impeller 7a and a second-stage impeller 7b are mounted on the rotating shaft 3, and a guide is provided to partition between the impellers 7a and 7b.
  • Daven 31 and passage cover 33 are provided.
  • a rectifying blade 32 is provided between the guide vane 31 and the passage cover 33, and the blade 32 is fixed to the guide vane 31 by welding. Therefore, the blade 3 2 becomes free with respect to the passage cover 3 3.
  • the passage cover 33 has a pressure difference in the axial direction of the pump P. Therefore, the passage cover 33 is easily deformed during operation.
  • the guide vane 31 does not deform because there is almost no pressure difference in the axial direction.
  • the blade 32 is fixed to the passage cover 33, the deformation may cause stress concentration at the fixed welded portion, which may cause damage.
  • the blade is fixed to the guide vane 31. No stress concentration occurs. Therefore, it is suitable for sheet metal O
  • a volute chamber 35 is formed radially outward of the final stage, that is, the second stage impeller 7 b, and communicates with the discharge port 9. That is, no guide vane is provided for the impeller 7b in the final part (the second stage in the example of FIG. 3).
  • the discharge port 9 is provided through the polytube 35, the discharge port 9 can be located radially outward of the impeller 7b, and the length in the axial direction can be shortened.
  • the cover casing supporting the mechanical seal provided on the rotating shaft is supported by the support member from the motor side, the mechanical seal does not fail.
  • the O-ring which seals the fluid path from the suction port to the venturi tube, is supported by stoppers to receive high-pressure liquid, so the sealing effect is reduced and the 0-ring may fall off due to deformation. Absent.
  • the liner between the impeller and the casing has a U-shaped cross section with the high-pressure side open, so that leakage is small and galling can be prevented. Then, holes for letting out the air accumulated in the motor side chamber of the impeller Since part of the hole is covered, large holes can be drilled, improving workability.
  • the flow regulating blades are fixed to guide vanes that are not affected by changes in pressure, and are free from the passage cover. Therefore, stress concentration does not occur even if the passage cover is deformed.
  • the discharge port is communicated through the radially outer volute of the last stage impeller, the length in the axial direction can be shortened. Therefore, the present invention can be suitably implemented in a sheet metal pump device that is lightweight but relatively easily deformed.

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

Abstract

L'invention concerne un dispositif de pompage formé par traitement de feuille métallique et ne subissant pas de déformation liée à la variation de pression, ce qui lui confère une bonne efficacité. Selon l'invention, ce dispositif de pompage comprend une partie moteur (M) et une partie pompe (P) qui sont solidaires, une hélice (7) placée dans un carter de pompe (4) et entraînée par un moteur (2), une garniture mécanique (11) supportée par une enveloppe (5) permettant de sceller une tige rotative (3) de l'hélice et un élément de support (21, 12A) fixé sur un côté du moteur (2) pour supporter un côté radialement intérieur de l'enveloppe (5) de manière à éviter que l'enveloppe (5) ne se déplace vers le moteur en raison des variations de pression. L'enveloppe est donc supportée du côté du moteur par l'élément de support, ce qui permet d'éviter toute défaillance de la garniture mécanique.
PCT/JP1997/004484 1997-12-08 1997-12-08 Dispositif de pompage forme par traitement de feuille metallique WO1999030040A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU51382/98A AU5138298A (en) 1997-12-08 1997-12-08 Pumping device formed by sheet-metal working
PCT/JP1997/004484 WO1999030040A1 (fr) 1997-12-08 1997-12-08 Dispositif de pompage forme par traitement de feuille metallique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1997/004484 WO1999030040A1 (fr) 1997-12-08 1997-12-08 Dispositif de pompage forme par traitement de feuille metallique

Publications (1)

Publication Number Publication Date
WO1999030040A1 true WO1999030040A1 (fr) 1999-06-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/004484 WO1999030040A1 (fr) 1997-12-08 1997-12-08 Dispositif de pompage forme par traitement de feuille metallique

Country Status (2)

Country Link
AU (1) AU5138298A (fr)
WO (1) WO1999030040A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001165090A (ja) * 1999-12-13 2001-06-19 Matsushita Electric Ind Co Ltd ポンプ
JP2022025504A (ja) * 2020-07-29 2022-02-10 株式会社荏原製作所 流体機械

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS322427B1 (fr) * 1954-10-08 1957-04-19
JPS5594491U (fr) * 1978-12-25 1980-06-30
JPH02135698U (fr) * 1989-04-14 1990-11-13
JPH0547493U (ja) * 1991-11-22 1993-06-25 株式会社ユニシアジェックス ウォーターポンプ
JPH0699516A (ja) * 1992-09-22 1994-04-12 Ube Nitto Kasei Co Ltd 熱可塑性樹脂製中空シート
JPH0647999B2 (ja) * 1990-02-22 1994-06-22 カーエスベー・アクチエンゲゼルシャフト 板金構造うず巻ケーシング
JPH0718436B2 (ja) * 1990-12-25 1995-03-06 株式会社荏原製作所 鋼板製中間ケーシング及び該中間ケーシングを用いた多段ポンプ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS322427B1 (fr) * 1954-10-08 1957-04-19
JPS5594491U (fr) * 1978-12-25 1980-06-30
JPH02135698U (fr) * 1989-04-14 1990-11-13
JPH0647999B2 (ja) * 1990-02-22 1994-06-22 カーエスベー・アクチエンゲゼルシャフト 板金構造うず巻ケーシング
JPH0718436B2 (ja) * 1990-12-25 1995-03-06 株式会社荏原製作所 鋼板製中間ケーシング及び該中間ケーシングを用いた多段ポンプ
JPH0547493U (ja) * 1991-11-22 1993-06-25 株式会社ユニシアジェックス ウォーターポンプ
JPH0699516A (ja) * 1992-09-22 1994-04-12 Ube Nitto Kasei Co Ltd 熱可塑性樹脂製中空シート

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001165090A (ja) * 1999-12-13 2001-06-19 Matsushita Electric Ind Co Ltd ポンプ
JP4517426B2 (ja) * 1999-12-13 2010-08-04 パナソニック電工株式会社 ポンプ
JP2022025504A (ja) * 2020-07-29 2022-02-10 株式会社荏原製作所 流体機械

Also Published As

Publication number Publication date
AU5138298A (en) 1999-06-28

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