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CA2385820A1 - Submersible motor with shaft seals - Google Patents

Submersible motor with shaft seals Download PDF

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Publication number
CA2385820A1
CA2385820A1 CA002385820A CA2385820A CA2385820A1 CA 2385820 A1 CA2385820 A1 CA 2385820A1 CA 002385820 A CA002385820 A CA 002385820A CA 2385820 A CA2385820 A CA 2385820A CA 2385820 A1 CA2385820 A1 CA 2385820A1
Authority
CA
Canada
Prior art keywords
motor
seal
shaft
seal chamber
pump
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.)
Granted
Application number
CA002385820A
Other languages
French (fr)
Other versions
CA2385820C (en
Inventor
Dale Andrews
Paul Russell
Michael Witzgall
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.)
Flowserve Management Co
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2385820A1 publication Critical patent/CA2385820A1/en
Application granted granted Critical
Publication of CA2385820C publication Critical patent/CA2385820C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps
    • F04D29/108—Shaft sealings especially adapted for liquid pumps the sealing fluid being other than the working liquid or being the working liquid treated
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Mechanical Sealing (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Sealing Of Bearings (AREA)

Abstract

A submersible electric motor driven pump has a motor chamber and a pump chamber separated by a seal chamber. Inboard and outboard shaft seals(MS1,MS 2) immersed in an oil buffer fluid within the seal chamber restricts the flow o f liquid from the seal chamber into the pump and motor chambers. An integral o r externally mounted pre-pressurized buffer fluid reservoir (PA) maintains a positive fluid pressure in the seal chamber relative to the external pressur e at working depth, and maintains a suitable buffer fluid level within the sea l chamber, in order to prevent the ingress of the pumped media through the outboard seal(MS2). A unique impeller design (631) circulates fluid within t he seal chamber in the region of the outboard shaft seal (MS2), allowing continuous dry run operation when used in conjunction with an integrally cooled motor design. A cartridge shaft sleeve subassembly, having a bearing (3) configured between the inboard and outboard seals (MS1,MS2), facilitates maintenance.

Claims (20)

1. A submersible motor and pump assembly comprising a motor and motor housing, said motor having an output shaft, a pump and pump housing, said pump housing connected to said motor housing, said pump being driven by said output shaft, a removable shaft sleeve mounted on said shaft, an inboard shaft seal proximate said motor, the rotating components of said inboard shaft seal mounted on said sleeve, an outboard shaft seal proximate said pump, a seal chamber interspersed between said motor and said pump, said seal chamber comprising in part the chamber side faces of said inboard shaft seal and said outboard shaft seal, said seal chamber charged with a buffer fluid under pressure at least equal to the pressure external of said motor and pump assembly at working depth, said buffer fluid having dielectric properties, a seal chamber pressurization system and at least one pressure reservoir integral to said motor and pump assembly for maintaining a positive pressure gradient within said seal chamber across said shaft seals, a buffer fluid circulation impeller mounted on said sleeve within said seal chamber proximate said outboard shaft seal, said impeller having at least one internal passageway connecting a rotationally normally forward facing intake tube on the periphery of said impeller to a discharge port on the hub of said impeller proximate said outboard shaft seal, and a multiplicity of radially oriented stator flanges in said seal chamber outboard of said impeller, one edge of said flanges being closely adjacent the arc of rotation of said intake tube.
2. A submersible motor and pump assembly according to claim 1, said pressure reservoir communicating with said seal chamber so as to maintain said positive pressure gradient during said operation, said integral seal chamber pressurization system comprising a capacity for buffer fluid in excess of such volume as is calculated to be lost due to leakage through said shaft seals during a period of normal operation of said motor and pump assembly.
3. A submersible motor and pump assembly according to claim 1, said at least one pressure reservoir being a multiplicity of pressure reservoirs connected to said seal chamber pressurization system.
4. A submersible motor and pump assembly according to claim l, the interior surface of said seal chamber extending upwardly away from said inboard shaft seal, thereby providing a limited volume within said seal chamber for containing gas above the height of said inboard shaft seal.
5. A submersible motor and pump assembly according to claim 1, further comprising motor cooling passageways in said motor housing, said motor cooling passageways communicating with said seal chamber, said impeller providing pressure for flowing said buffer fluid therein.
6. A submersible motor and pump assembly according to claim 1, said impeller further comprising at least one said internal passageway connecting a rotationally normally rearward facing discharge port on said periphery to a hub intake port on said hub.
7. A submersible motor and pump assembly according to claim 1, further comprising means for sensing pressure in said seal chamber, means for sensing said pressure external of said motor and pump assembly at working depth, and means for deactivating said motor when said pressure in said seal chamber falls below said pressure external of said motor and pump assembly at working depth.
8. A submersible motor and pump assembly comprising a motor and motor housing, said motor having an output shaft, a pump and pump housing, said pump housing connected to said motor housing, said pump being driven by said output shaft, an inboard shaft seal on said shaft proximate said motor, an outboard shaft seal on said shaft proximate said pump, a seal chamber interspersed between said motor and said pump, said seal chamber comprising in part the chamber side faces of said inboard shaft seal and said outboard shaft seal, said seal chamber charged with a buffer fluid under pressure at least equal to the pressure external of said motor and pump assembly, said buffer fluid having dielectric properties, a seal chamber pressurization system and at least one pressure reservoir integral to said motor and pump assembly for maintaining a positive pressure gradient within said seal chamber across said shaft seals.
9. A submersible motor and pump assembly according to claim 8, said integral seal chamber pressurization system comprising a capacity for buffer fluid in excess of such volume as is calculated to be lost due to leakage through said shaft seals during a period of normal operation of said motor and pump assembly, said pressure reservoir communicating with said seal chamber so as to maintain said positive pressure gradient during said operation.
10. A submersible motor and pump assembly according to claim 9, said at least one pressure reservoir being a multiplicity of pressure reservoirs connected to said seal chamber pressurization system.
11. A submersible motor and pump assembly according to claim 9, the inner surface of said seal chamber extending upwardly away from said inboard shaft seal, thereby providing a limited volume within said seal chamber for containing gas above the height of said inboard shaft seal.
12. A submersible motor and pump assembly according to claim 11, further comprising a buffer fluid circulation impeller mounted on said shaft within said seal chamber proximate said outboard shaft seal, at least one passageway within said impeller connecting a rotationally normally forward facing intake tube on the periphery of said impeller to a discharge port on the hub of said impeller proximate said outboard shaft seal, and a multiplicity of radially oriented stator flanges in said seal chamber outboard of said impeller, one edge of said flanges being closely adjacent the arc of rotation of said intake tube.
13. A submersible motor and pump assembly comprising a motor and motor housing, said motor having an output shaft, a pump and pump housing, said pump housing connected to said motor housing, said pump being driven by said output shaft, an inboard shaft seal on said shaft proximate said motor, an outboard shaft seal on said shaft proximate said pump, a seal chamber interspersed between said motor and said pump, said seal chamber comprising in part the chamber side faces of said inboard shaft seal and said outboard shaft seal, said seal chamber charged with a buffer fluid, a buffer fluid circulation impeller with a hub and a periphery, said impeller mounted on said shaft within said seal chamber proximate said outboard shaft seal, said impeller having at least one internal passageway connecting a rotationally normally forward facing intake tube on said periphery to a discharge port on said hub proximate said outboard shaft seal, and a multiplicity of radially oriented stator flanges in said seal chamber outboard of said impeller, one edge of said flanges being closely adjacent the arc of rotation of said intake tube.
14. A submersible motor and pump assembly according to claim 13, further comprising a seal chamber pressurization system and at least one pressure reservoir integral to said motor and pump assembly for maintaining a positive pressure gradient within said seal chamber across said shaft seals, said integral seal chamber pressurization system comprising a capacity for buffer fluid in excess of such volume as is calculated to be lost due to leakage through said shaft seals during a period of normal operation of said motor and pump assembly, said pressure reservoir communicating with said seal chamber so as to maintain said positive pressure gradient during said operation.
15. A submersible motor and pump assembly according to claim 14, said impeller further comprising at least one internal passageway connecting a rotationally normally rearward facing discharge port on said periphery to a hub intake port on said hub proximate said outboard shaft seal.
16. A submersible motor and pump assembly comprising a motor and motor housing, said motor having an output shaft, a pump and pump housing, said pump housing connected to said motor housing, said pump being driven by said output shaft, an inboard shaft seal proximate said motor, an outboard shaft seal proximate said pump, a seal chamber interspersed between said motor and said pump, a removable shaft sleeve mounted on said shaft within said seal chamber, the rotating component of said inboard shaft seal mounted on said sleeve, and a shaft bearing and bearing support structure within said seal chamber, said shaft bearing mounted on said sleeve.
17. A submersible motor and pump assembly according to claim 16, further comprising a buffer fluid circulation impeller within said seal chamber, said impeller mounted on said sleeve.
18. A submersible motor and pump assembly according to claim 17, said buffer fluid circulation impeller comprising a hub and a periphery, said impeller having at least one internal passageway connecting a rotationally normally forward facing intake tube on said periphery to a discharge port on said hub proximate said outboard shaft seal, said seal chamber configured with a multiplicity of radially oriented stator flanges outboard of said impeller, one edge of said flanges being closely adjacent the arc of rotation of said intake tube.
19. A submersible motor and pump assembly according to claim 18, further comprising motor cooling passageways in said motor housing, said motor cooling passageways communicating with said seal chamber, said impeller providing pressure for flowing said buffer fluid therein.
20. A submersible motor and pump assembly according to claim 19, said impeller further comprising at least one internal passageway connecting a rotationally normally rearward facing discharge port on said periphery to a hub intake port on said hub.
CA2385820A 1999-10-04 2000-09-29 Submersible motor with shaft seals Expired - Fee Related CA2385820C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US15770299P 1999-10-04 1999-10-04
US60/157,702 1999-10-04
PCT/US2000/026898 WO2001025634A1 (en) 1999-10-04 2000-09-29 Submersible motor with shaft seals

Publications (2)

Publication Number Publication Date
CA2385820A1 true CA2385820A1 (en) 2001-04-12
CA2385820C CA2385820C (en) 2010-04-06

Family

ID=22564910

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2385820A Expired - Fee Related CA2385820C (en) 1999-10-04 2000-09-29 Submersible motor with shaft seals

Country Status (10)

Country Link
EP (1) EP1222393B1 (en)
JP (1) JP4644406B2 (en)
CN (1) CN1224782C (en)
AT (1) ATE417201T1 (en)
AU (1) AU7840800A (en)
CA (1) CA2385820C (en)
DE (1) DE60041076D1 (en)
ES (1) ES2317852T3 (en)
MX (1) MXPA02003375A (en)
WO (1) WO2001025634A1 (en)

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Publication number Priority date Publication date Assignee Title
CN107747545A (en) * 2017-11-22 2018-03-02 山西神龙泵业有限公司 Amphibious pipeline pump
CN113294348A (en) * 2021-07-09 2021-08-24 上海佰诺泵阀有限公司 Air cushion separation type leakage-free slurry type magnetic pump

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JP2014156789A (en) * 2013-02-14 2014-08-28 Kawamoto Pump Mfg Co Ltd Submersible pump
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CN105715560B (en) * 2016-03-28 2018-02-13 武汉船用机械有限责任公司 A kind of pump head device of deep well pump
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RU176502U1 (en) * 2017-05-12 2018-01-22 Открытое акционерное общество (ОАО) "Турбонасос" CENTRIFUGAL VERTICAL PUMP
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RU175622U1 (en) * 2017-05-29 2017-12-12 Акционерное общество (АО) "Научно-исследовательский институт "Лопастных машин" ("НИИ ЛМ") VERTICAL CENTRIFUGAL SUBMERSIBLE PUMP
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CN109058126A (en) * 2018-09-20 2018-12-21 江苏大学镇江流体工程装备技术研究院 A kind of vertical emergency drainage centrifugal pump
CN112032064B (en) * 2020-09-15 2024-06-07 江苏博禹泵业有限公司 Large-flow portable stainless steel hydraulic submersible pump with motor not contacted with water
CN112065534B (en) * 2020-09-18 2021-07-06 神通科技集团股份有限公司 Active oil-gas separator
CN113629930B (en) * 2021-10-12 2022-02-08 江苏应龙高压电机制造有限公司 Deep sea is with oily formula submersible motor refueling unit that does not tear open
CN114526240B (en) * 2022-03-25 2024-06-07 西安泵阀总厂有限公司 Rare earth permanent magnet driven single-stage single-suction centrifugal pump, flushing and self-lubricating method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107747545A (en) * 2017-11-22 2018-03-02 山西神龙泵业有限公司 Amphibious pipeline pump
CN107747545B (en) * 2017-11-22 2024-02-02 山西神龙泵业有限公司 Amphibious pipeline pump
CN113294348A (en) * 2021-07-09 2021-08-24 上海佰诺泵阀有限公司 Air cushion separation type leakage-free slurry type magnetic pump

Also Published As

Publication number Publication date
CA2385820C (en) 2010-04-06
DE60041076D1 (en) 2009-01-22
EP1222393B1 (en) 2008-12-10
ES2317852T3 (en) 2009-05-01
AU7840800A (en) 2001-05-10
EP1222393A4 (en) 2002-11-06
JP4644406B2 (en) 2011-03-02
MXPA02003375A (en) 2004-09-27
ATE417201T1 (en) 2008-12-15
CN1377447A (en) 2002-10-30
WO2001025634A1 (en) 2001-04-12
EP1222393A1 (en) 2002-07-17
CN1224782C (en) 2005-10-26
JP2003529702A (en) 2003-10-07

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Effective date: 20140930