US20010048844A1 - Clamping spring ring - Google Patents

Clamping spring ring Download PDF

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Publication number
US20010048844A1
US20010048844A1 US09/456,271 US45627199A US2001048844A1 US 20010048844 A1 US20010048844 A1 US 20010048844A1 US 45627199 A US45627199 A US 45627199A US 2001048844 A1 US2001048844 A1 US 2001048844A1
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US
United States
Prior art keywords
details
detail
spring
bearing
housing
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
US09/456,271
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US6345928B2 (en
Inventor
Johan Bratthall
Borje Stahl
Lars Ogren
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.)
Xylem IP Holdings LLC
Original Assignee
ITT Manufacturing Enterprises LLC
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Filing date
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Assigned to ITT MANUFACTURING ENTERPRISES, INC. reassignment ITT MANUFACTURING ENTERPRISES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRATTHALL, JOHAN, OGREN, LARS, STAHL, BORJE
Publication of US20010048844A1 publication Critical patent/US20010048844A1/en
Application granted granted Critical
Publication of US6345928B2 publication Critical patent/US6345928B2/en
Assigned to XYLEM IP HOLDINGS LLC reassignment XYLEM IP HOLDINGS LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ITT MANUFACTURING ENTERPRISES, LLC
Assigned to ITT MANUFACTURING ENTERPRISES, LLC reassignment ITT MANUFACTURING ENTERPRISES, LLC CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: ITT MANUFACTURING ENTERPRISES, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/60—Biased catch or latch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/60—Biased catch or latch
    • Y10T403/602—Biased catch or latch by separate spring

Definitions

  • the invention concerns a device for mutual locking of concentric cylindrical parts such as parts in a submersible pump unit.
  • a machine of this type normally includes an electrically driven motor and a hydraulic unit with a rotating impeller connected to the motor via a rotary driving shaft.
  • one or two seals are normally arranged between the motor and the hydraulic unit.
  • a common type of seal is the so-called mechanical face seal, which includes one seal ring rotating with the shaft and one stationary seal ring attached to the surrounding housing. The two seal rings are pressed against each other by a spring, thus preventing medium from entering between the seal surfaces.
  • a pump unit of the above mentioned type will thus include an electric motor, a seal housing and a hydraulic unit with an impeller connected to the motor via a central rotary shaft.
  • Big machines are normally kept together by help o flanges provided with a number of bolts along their circumferences. Smaller machines may be connected by help of long bolts around the periphery which bolts press the outer parts towards each other, thus locking the intermediate part therebetween.
  • a device for obtaining a an axial locking between a, concentric details is disclosed in SE-399 745.
  • An element 6 is here arranged within grooves in the concentric details thus establishing an axial mutual locking.
  • a disadvantage however, is that said element 6 is rigid, which means that the concentric details are not allowed to come into contact with each other. The result will be that the mutual location of the details is not defined, but may vary depending on the dimension of the element 6 . In addition there is no locking aginst mutual rotation.
  • 1 and 2 stand for the rotor and the stator respectively in an electric motor, 3 a driving shaft, 4 and 5 bearings, 6 a bearing housing, 7 a bearing cover, 8 and 9 chamfers on the peripheries of the bearing housing and the bearing cover respectively.
  • 10 a capsule surrounding the stator, 11 an internal groove in said capsule and 12 a locking coil spring.
  • FIG. 2 shows the spring 12 , in the straight and united configurations.
  • the machine thus comprises an electric driving unit consisting of a rotor 1 and a stator 2 .
  • a driving shaft 3 is supported in an upper bearing 4 and a lower bearing 5 respectively, said lower bearing being mounted in a bearing housing 6 having a cover 7 .
  • the machine also comprising a seal housing and a pump housing with an impeller connected to the lower end of the driving shaft 3 .
  • the driving shaft 3 is subject to strong axial forces during operation and it is thus very important that it is correctly locked axially in relation to the stator 2 .
  • the lower bearing 5 is supported in a housing 6 which locks the bearing and prevents it from being moved upwardly or to the side.
  • the bearing housing 6 is further provided with a collar, the periphery of which extends out to the stator capsule 10 .
  • the bearing is locked to the housing by a cover 8 which is pressed against the underside of the bearing and is fixed to the bearing housing by screws.
  • the periphery of the cover 7 having the same diameter as the collar on the bearing housing.
  • the lower bearing 5 is fixed in the bearing housing 6 in the capsule 10 by help of a special design.
  • the capsule 10 is being provided with an internal circumferential groove 11 .
  • the peripheries of the collar on the bearing housing as well as the cover 7 are provided with chamfers 8 and 9 respectively. These create together a ring formed channel on the inside of the capsule. This channel is utilized for mutual locking of the details in the following way:
  • the bearing housing 6 is slid onto the shaft 3 into a position decided by a shoulder on the shaft.
  • the periphery of the collar on the bearing housing will then be positioned opposite the groove 11 in the capsule 10 .
  • a looking coil spring 12 having an elastically deformable cross section, is mounted in the ring formed channel or channels established between the groove 11 and the chamfer 8 on the periphery of the collar.
  • Said spring being preferably designed like a spiral spring with its ends being united thus forming a ring with a diameter mainly the same as that of the inner wall of the capsule 10 .
  • the dimension of the spring 12 being such that it can be accomodated within the channel or channels.
  • the bearing 5 is then slid onto the shaft and mounted in the bearing housing 6 and the cover 7 is pressed into alignment with the underside of the bearing and attached to the bearing housing by help of axial screws.
  • the chamfer 9 on the periphery of the cover 7 the closes the ring formed channel where the spring 12 has been inserted.
  • Said spring the dimension of which being such that it fills up the channel, then obtains an effective mutual axial as well as radial locking of the bearing housing and the capsule 10 and consequently also an axial locking of the bearing and the shaft.
  • the capsule 10 in its turn being pressed around the stator 2 which means that a well connected package is obtained.
  • a condition for obtaining a sufficient strength of the joint is that the detail used in the channel must be resilient, but at the same time sufficiently rigid.
  • a correctly dimensioned spiral spring is then a perfect solution.
  • a rigid ring such as a lock ring, demands very high tolerances and an o-ring is too flexible to obtain a sufficient strength when the joint is subject to high stress.
  • a rigid ring having a coating of resilient material could be used and is within the scope of the invention

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Frames (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Gyroscopes (AREA)
  • Cable Accessories (AREA)
  • Springs (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Impact Printers (AREA)
  • Clamps And Clips (AREA)

Abstract

The invention concerns a device for mutual locking of two concentric cylindrical parts such as parts to be used in a submersible pump unit.
One outer part (10) and two inner parts (6) and (7) are locked mutually by help of a circumferential locking element (12) having resilient abilities and which is arranged at the intersectional point between the three parts (6), (7) and (10).

Description

  • The invention concerns a device for mutual locking of concentric cylindrical parts such as parts in a submersible pump unit. [0001]
  • A machine of this type normally includes an electrically driven motor and a hydraulic unit with a rotating impeller connected to the motor via a rotary driving shaft. [0002]
  • In order to prevent the medium within the hydraulic unit from penetrating the motor along the driving shaft, one or two seals are normally arranged between the motor and the hydraulic unit. A common type of seal is the so-called mechanical face seal, which includes one seal ring rotating with the shaft and one stationary seal ring attached to the surrounding housing. The two seal rings are pressed against each other by a spring, thus preventing medium from entering between the seal surfaces. [0003]
  • A pump unit of the above mentioned type will thus include an electric motor, a seal housing and a hydraulic unit with an impeller connected to the motor via a central rotary shaft. [0004]
  • In order to keep the different parts together into one unit there are several solutions. Big machines are normally kept together by help o flanges provided with a number of bolts along their circumferences. Smaller machines may be connected by help of long bolts around the periphery which bolts press the outer parts towards each other, thus locking the intermediate part therebetween. [0005]
  • Examples of such solutions are shown in SE-415 696 and DE-1 653 726. [0006]
  • A disadvantage with these known solutions is that they are relatively expensive because of costly materials and because of the fact that the mounting time could be extensive. The problem to be solved is thus to obtain a slim design without any outer details which add to its diameter. [0007]
  • A device for obtaining a an axial locking between a, concentric details is disclosed in SE-399 745. An element [0008] 6 is here arranged within grooves in the concentric details thus establishing an axial mutual locking. A disadvantage however, is that said element 6 is rigid, which means that the concentric details are not allowed to come into contact with each other. The result will be that the mutual location of the details is not defined, but may vary depending on the dimension of the element 6. In addition there is no locking aginst mutual rotation.
    •
  • The invention is described more closely below with reference to the enclosed drawings that show a cut through a pump according to the invention, and a locking coil spring. [0009]
  • In FIG. 1, 1 and [0010] 2 stand for the rotor and the stator respectively in an electric motor, 3 a driving shaft, 4 and 5 bearings, 6 a bearing housing, 7 a bearing cover, 8 and 9 chamfers on the peripheries of the bearing housing and the bearing cover respectively. 10 a capsule surrounding the stator, 11 an internal groove in said capsule and 12 a locking coil spring.
  • FIG. 2 shows the [0011] spring 12, in the straight and united configurations.
  • The machine thus comprises an electric driving unit consisting of a rotor [0012] 1 and a stator 2. A driving shaft 3 is supported in an upper bearing 4 and a lower bearing 5 respectively, said lower bearing being mounted in a bearing housing 6 having a cover 7. The machine also comprising a seal housing and a pump housing with an impeller connected to the lower end of the driving shaft 3.
  • The driving shaft [0013] 3 is subject to strong axial forces during operation and it is thus very important that it is correctly locked axially in relation to the stator 2. According to the invention, the lower bearing 5 is supported in a housing 6 which locks the bearing and prevents it from being moved upwardly or to the side. The bearing housing 6 is further provided with a collar, the periphery of which extends out to the stator capsule 10. The bearing is locked to the housing by a cover 8 which is pressed against the underside of the bearing and is fixed to the bearing housing by screws. The periphery of the cover 7 having the same diameter as the collar on the bearing housing.
  • According to the invention the lower bearing [0014] 5 is fixed in the bearing housing 6 in the capsule 10 by help of a special design. According to a preferred embodiment the capsule 10 is being provided with an internal circumferential groove 11. The peripheries of the collar on the bearing housing as well as the cover 7 are provided with chamfers 8 and 9 respectively. These create together a ring formed channel on the inside of the capsule. This channel is utilized for mutual locking of the details in the following way:
  • When the details are mounted the bearing housing [0015] 6 is slid onto the shaft 3 into a position decided by a shoulder on the shaft. The periphery of the collar on the bearing housing will then be positioned opposite the groove 11 in the capsule 10. In the ring formed channel or channels established between the groove 11 and the chamfer 8 on the periphery of the collar, a looking coil spring 12, having an elastically deformable cross section, is mounted. Said spring being preferably designed like a spiral spring with its ends being united thus forming a ring with a diameter mainly the same as that of the inner wall of the capsule 10. The dimension of the spring 12 being such that it can be accomodated within the channel or channels.
  • The bearing [0016] 5 is then slid onto the shaft and mounted in the bearing housing 6 and the cover 7 is pressed into alignment with the underside of the bearing and attached to the bearing housing by help of axial screws. The chamfer 9 on the periphery of the cover 7 the closes the ring formed channel where the spring 12 has been inserted. Said spring, the dimension of which being such that it fills up the channel, then obtains an effective mutual axial as well as radial locking of the bearing housing and the capsule 10 and consequently also an axial locking of the bearing and the shaft. The capsule 10 in its turn being pressed around the stator 2 which means that a well connected package is obtained.
  • A condition for obtaining a sufficient strength of the joint, without the demand for extreme manufacturing tolerances, is that the detail used in the channel must be resilient, but at the same time sufficiently rigid. A correctly dimensioned spiral spring is then a perfect solution. By choosing a suitable relationship between compressing strain and the spring constant in the locking spring, a butt contact between the bearing housing [0017] 6 and the bearing cover 7 is secured over a a certain tolerance range. A rigid ring such as a lock ring, demands very high tolerances and an o-ring is too flexible to obtain a sufficient strength when the joint is subject to high stress. A rigid ring having a coating of resilient material could be used and is within the scope of the invention
  • In the description above and in the enclosed drawing the preferred embodiment is described as a mutual locking between a bearing housing and a surrounding stator capsule in a submersible pump. The invention is however not limited to this field, but possible to apply in general for mutual locking of concentric details [0018]
  • Other embodiments within the scope of the invention can be a division of the groove [0019] 11 into several parts. Further variants are that only one of the parts bearing housing or bearing cover is provided with a chamfer 8 or 9, or that the room for accommodation of the coil spring is established by the groove 11 only. According to still another alternative, the groove is eliminated and the room for the coil spring is established by one or two chamfers on the bearing housing and/or the bearing cover.

Claims (5)

1. A device for mutual axial and radial locking and securing of cylindrical details, especially an outer detail (10) and two adjacent internal details (6) and (7) respectively, the lathers having the same outer diameters which equals the inner diameter of the outer detail (10), characterized in, that a locking ring designed as a spring element having an elastically deferrable cross section, such as a helical spring (12), or a rigid element having a layer of a resilient material, is compressed in a preferably circumferentially formed channel which is established in the intersection between the three details (10), (6) and (7).
2. A device according to
claim 1
, characterized in, that the outer detail (10) is a stator housing in an electric motor and that the inner details (6) and (7) respectively, are a bearing housing and a bearing cover respectively, said cover being attached to said bearing housing, the housing as well as the cover being provided with collars which extend outwards to the stator housing (10).
3. A device according to
claim 1
, characterized in, that the detail (10) is provided with an internal groove (11), prefearably around its entire periphery, which groove accomodates the spring element (12) in the intersection between the three details (10), (6) and (7).
4. A device according to
claim 1
, characterized in, that the detail (6) and/or alternatively the detail (7) are provided with chamfers (8) and (9) respectively, facing each other, for accomodating the spring element (12) in the intersection between the three details (10), (6) and (7).
5. A device according to
claim 1
, characterized in, that the clamping spring (12) is a spiral spring having a diameter corresponding with the cross section of said channel or channels in the intersection between the three details (10), (6) and (7), the ends of said spring being united, thus creating a ring having a diameter corresponding with the inner diameter of the outer detail (10).
US09/456,271 1998-12-23 1999-12-07 Clamping spring ring Expired - Lifetime US6345928B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9804525A SE9804525D0 (en) 1998-12-23 1998-12-23 Locking
SE9804525-5 1998-12-23
CA002291707A CA2291707C (en) 1998-12-23 1999-12-03 A clamping spring ring

Publications (2)

Publication Number Publication Date
US20010048844A1 true US20010048844A1 (en) 2001-12-06
US6345928B2 US6345928B2 (en) 2002-02-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
US09/456,271 Expired - Lifetime US6345928B2 (en) 1998-12-23 1999-12-07 Clamping spring ring

Country Status (14)

Country Link
US (1) US6345928B2 (en)
EP (1) EP1014538B1 (en)
JP (1) JP4188526B2 (en)
CN (1) CN1257970A (en)
AT (1) ATE261627T1 (en)
AU (1) AU751817B2 (en)
BR (1) BR9906167A (en)
CA (1) CA2291707C (en)
DE (1) DE69915444T2 (en)
ES (1) ES2213346T3 (en)
ID (1) ID24125A (en)
SE (1) SE9804525D0 (en)
TR (1) TR199903262A2 (en)
ZA (1) ZA997820B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070065314A1 (en) * 2005-09-06 2007-03-22 Denso Corporation Fluid pump having housing
US9071094B2 (en) 2012-06-29 2015-06-30 Regal Beloit America, Inc. Securing device for use in an electric machine

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100402871C (en) * 2005-09-09 2008-07-16 金宝电子工业股份有限公司 Shaft fastening device
AU2013382371B2 (en) * 2013-03-15 2018-09-27 Philip Morris Products S.A. An aerosol-generating system with a replacable mouthpiece cover
CN104227038A (en) * 2014-09-17 2014-12-24 平湖市当湖街道飞天人机械图文设计服务部 Lifting system connection sleeve of numerical control lathe and thermal treatment technology of lifting system connection sleeve
USD881365S1 (en) 2018-02-28 2020-04-14 S. C. Johnson & Son, Inc. Dispenser
USD880670S1 (en) 2018-02-28 2020-04-07 S. C. Johnson & Son, Inc. Overcap
USD872245S1 (en) 2018-02-28 2020-01-07 S. C. Johnson & Son, Inc. Dispenser
USD872847S1 (en) 2018-02-28 2020-01-14 S. C. Johnson & Son, Inc. Dispenser
USD853548S1 (en) 2018-05-07 2019-07-09 S. C. Johnson & Son, Inc. Dispenser
USD852938S1 (en) 2018-05-07 2019-07-02 S. C. Johnson & Son, Inc. Dispenser

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Publication number Priority date Publication date Assignee Title
US3218095A (en) * 1964-04-16 1965-11-16 Vibraseal Corp Tube coupling
DE1959666C3 (en) * 1969-11-28 1975-04-03 Goetzewerke Friedrich Goetze Ag, 5673 Burscheid Clamping and sealing rings, in particular for exhaust pipe connections
US4684837A (en) * 1985-05-20 1987-08-04 Franklin Electric Co., Inc. Electric submersible motor with dual snap ring clamp
NL8902306A (en) * 1989-09-14 1991-04-02 Fischer Georg Nv PIPE COUPLING.
EP0491258B1 (en) * 1990-12-17 1996-04-17 Peter J. Balsells Spring-loaded ring seal assembly
DE4417579A1 (en) * 1993-05-21 1994-11-24 Advanced Prod Inc Metallic sealing ring
US5411348A (en) * 1993-10-26 1995-05-02 Bal Seal Engineering Company, Inc. Spring mechanism to connect, lock and unlock, members

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070065314A1 (en) * 2005-09-06 2007-03-22 Denso Corporation Fluid pump having housing
US7950907B2 (en) 2005-09-06 2011-05-31 Denso Corporation Fluid pump having housing
US9071094B2 (en) 2012-06-29 2015-06-30 Regal Beloit America, Inc. Securing device for use in an electric machine

Also Published As

Publication number Publication date
AU751817B2 (en) 2002-08-29
AU6540399A (en) 2000-06-29
DE69915444D1 (en) 2004-04-15
CA2291707C (en) 2003-06-10
EP1014538A2 (en) 2000-06-28
EP1014538B1 (en) 2004-03-10
ID24125A (en) 2000-07-06
JP2000245097A (en) 2000-09-08
CA2291707A1 (en) 2001-06-03
SE9804525D0 (en) 1998-12-23
DE69915444T2 (en) 2004-12-23
TR199903262A2 (en) 2000-07-21
BR9906167A (en) 2000-08-15
JP4188526B2 (en) 2008-11-26
ES2213346T3 (en) 2004-08-16
ATE261627T1 (en) 2004-03-15
CN1257970A (en) 2000-06-28
US6345928B2 (en) 2002-02-12
ZA997820B (en) 2001-01-02
EP1014538A3 (en) 2002-12-18

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