JP4737927B2 - Vertical electric pump - Google Patents

Vertical electric pump Download PDF

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Publication number
JP4737927B2
JP4737927B2 JP2003295955A JP2003295955A JP4737927B2 JP 4737927 B2 JP4737927 B2 JP 4737927B2 JP 2003295955 A JP2003295955 A JP 2003295955A JP 2003295955 A JP2003295955 A JP 2003295955A JP 4737927 B2 JP4737927 B2 JP 4737927B2
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Japan
Prior art keywords
load side
bearing
stator
rotor
pump
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Expired - Fee Related
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JP2003295955A
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Japanese (ja)
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JP2005061378A (en
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隆典 池田
正彦 福田
一夫 飯坂
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Tsurumi Manufacturing Co Ltd
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Tsurumi Manufacturing Co Ltd
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    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing

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  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Description

本発明は、軸承構造の改良によりポンプ高さを低くすることが容易な竪型電動ポンプに関するものである。   The present invention relates to a saddle type electric pump in which the pump height can be easily lowered by improving the bearing structure.

従来の竪型電動ポンプではステータ内に挿入されたロータがモータ軸の反負荷側導出部を上部軸受ケース内の軸受により支承させると共に、下方へ導延されたモータ軸の負荷側導出部を下部軸受ケース内の軸受により支承させるという構造が採られている（例えば、特許文献１−４参照）。   In the conventional vertical electric pump, the rotor inserted in the stator supports the non-load side lead-out portion of the motor shaft by the bearing in the upper bearing case, and the load-side lead-out portion of the motor shaft extended downward is the lower portion. A structure is adopted in which the bearing is supported by a bearing in the bearing case (see, for example, Patent Documents 1-4).

このようにモータ軸の負荷側導出部と反負荷側導出部とのそれぞれに軸受ケースおよび軸受を配置させる構造では、モータ軸の長さも長くなる結果としてポンプ高さも高くなり、重心が高くなって不安定な設置場所では転倒し易く、床下などの高さに制約があって縦置きできない場所での使用時には、竪型ポンプを横倒しにして無理矢理に設置せざるお得ないため、ポンプの吸込口を水底まで下げられず、従って底水位まで排水することができなくなる。   In this way, in the structure in which the bearing case and the bearing are arranged in each of the load side lead-out part and the anti-load side lead-out part of the motor shaft, the length of the motor shaft becomes long and as a result, the pump height increases and the center of gravity increases It is easy to tip over in an unstable installation location, and when using it in a place where there is a restriction on the height such as under the floor and cannot be installed vertically, it is unavoidable to lay down the vertical pump and install it forcibly. Cannot be lowered to the bottom of the water, and therefore cannot be drained to the bottom water level.

ポンプ高さを低くする目的により、モータ軸の反負荷側導出部の軸受を省略し、負荷側導出部のみを複列軸受により支承させるという、片持支持構造も提案されている（例えば、特許文献５参照）。   For the purpose of lowering the pump height, a cantilever support structure has been proposed in which the bearing on the non-load side lead-out portion of the motor shaft is omitted and only the load-side lead-out portion is supported by a double row bearing (for example, a patent Reference 5).

しかし、負荷側導出部のみの片持支持構造では、たとえ複列軸受であっても軸振れを生じて軸受が摩耗し易いだけでなく、モータ軸の僅かな軸振れによってロータが大きく偏心し、該ロータの偏心回転によりステータとの接触を生じるという重大な結果を招くおそれもある。
特開平１１−７５３４５号公報 （第１−２図） 特開２００３−１６６４９３号公報 （第１図） 特開２００３−１６６４９４号公報 （第１図） 特開平１０−２６６９９５号公報 （第３−４図） 特開平６−２４９１８４号公報 （第１図） However, in the cantilever support structure with only the load side lead-out part, even if it is a double row bearing, not only does the shaft run out and the bearing is easily worn, but the rotor is greatly eccentric due to slight shaft runout of the motor shaft, There is also a possibility of causing a serious result that the eccentric rotation of the rotor causes contact with the stator.
JP 11-75345 A (Fig. 1-2) JP 2003-166493 A (FIG. 1) JP 2003-166494 A (FIG. 1) Japanese Patent Laid-Open No. 10-266995 (FIG. 3-4) JP-A-6-249184 (FIG. 1)

解決しようとする問題点は、竪型電動ポンプが軸振れを生じることなく、且つ、ポンプ高さを低く構成し得ることである。   The problem to be solved is that the vertical electric pump can be configured without causing shaft runout and with a low pump height.

本発明は、軸振れを生じさせない軸承構造で、しかもポンプ高さを低く構成させるため、モータ軸の負荷側導出部の軸受を省略し、反負荷側の軸受は存置しておき、ロータとステータとの挿入面の下端部付近にそれぞれ凹設された環溝に負荷側の転がり軸受を付設させ、該転がり軸受と前記反負荷側の軸受により、ロータがステータ内において回転自在に枢支されるよう構成したことを最も主要な特徴とする。 The present invention has a bearing structure that does not cause shaft runout and a low pump height. Therefore, the bearing on the load side lead-out portion of the motor shaft is omitted, the bearing on the anti-load side is kept, and the rotor and stator A load-side rolling bearing is attached to each annular groove recessed near the lower end of the insertion surface, and the rotor is pivotally supported in the stator by the rolling bearing and the anti-load-side bearing. The main feature is that it is configured as described above.

本発明竪型電動ポンプによれば、モータ軸の反負荷側導出部よりも遥かに大径の部分が転がり軸受により支承されるため、従来よりも遥かに大きなサイズの軸受が使用され許容される支承荷重も大きくなって軸振れを生じるおそれがなく、軸受自体の寿命も著しく延命されることになる。また、モータ軸の負荷側導出部の軸受を省略することによって当該軸受を収容するための軸受ケース部品がなくなると共にモータ軸の長さが短くて済み、延いてはポンプ高さを低く構成することができるので、重心も低くなり不安定な設定場所においても転倒し難く、また、床下などの高さに制約がある場所での使用時においても、ポンプを横倒しすることなく正立状態で設置し得られ、従って、ポンプ吸込口が水底まで下げた状態で底水位まで排水することができるという利点がある。更にまた、ロータとモータ軸および負荷側と反負荷側の各軸受がそのままの結合状態で下方へ引き抜くことのできる構成となっているため、組立および分解が容易となるという副次的効果を伴うことになる。   According to the vertical type electric pump of the present invention, a part having a diameter much larger than the lead-out part on the side opposite to the load side of the motor shaft is supported by the rolling bearing. The bearing load is also increased and there is no risk of shaft runout, and the life of the bearing itself is significantly extended. Further, by omitting the bearing at the load side lead-out portion of the motor shaft, there is no bearing case part for housing the bearing, and the length of the motor shaft can be shortened, so that the pump height is reduced. The center of gravity is low and it is difficult to fall even in unstable setting places.Also, when used in places where the height is restricted, such as under the floor, the pump can be installed in an upright position without lying down. Therefore, there is an advantage that the water can be discharged to the bottom water level while the pump suction port is lowered to the water bottom. Furthermore, since the rotor, the motor shaft, and the bearings on the load side and the anti-load side can be pulled out in their combined state, there is a secondary effect that assembly and disassembly are easy. It will be.

実施例の図１および図２により説明すれば、１はポンプケーシング、２はポンプケーシング１の上に設けられたオイルケーシング、３はオイルケーシング２を介してポンプケーシング１の上方に立設されたモータフレーム、３Ａはモータフレームの上面においてブラケット３Ｂに装着された反負荷側の軸受、４はモータフレーム３内に収容されたステータ、５はステータ４内に挿入されたロータ、６はロータ５の中心に嵌着されたモータ軸であって、その反負荷側導出部は反負荷側の軸受３Ａにより支承され、負荷側導出部はポンプケーシング１内へ導下されてその導下先端部６ａはポンプケーシング１内の羽根車７に装着されている。   1 and 2 of the embodiment, 1 is a pump casing, 2 is an oil casing provided on the pump casing 1, and 3 is erected above the pump casing 1 via the oil casing 2. A motor frame, 3A is a bearing on the anti-load side mounted on the bracket 3B on the upper surface of the motor frame, 4 is a stator housed in the motor frame 3, 5 is a rotor inserted into the stator 4, and 6 is a rotor 5 The motor shaft is fitted in the center, and the anti-load side lead-out portion is supported by the anti-load-side bearing 3A. The load-side lead-out portion is guided into the pump casing 1 and the leading end 6a is It is attached to an impeller 7 in the pump casing 1.

８はロータ５の下端部付近の外周に凹設された環溝であり、その深さは後記負荷側の転がり軸受９の内輪９ａの内径に適合させておく。８ｂはステータ４の下端部付近の内周に凹設された環溝であり、後記負荷側の転がり軸受９の外輪９ｂの外径に適合させて極浅く凹設されている。９は負荷側の転がり軸受であり、ロータ５の下端部付近の外周に凹設された前記環溝８へ内輪９ａを嵌着させる共に、ステータ４の下端部付近の内周に凹設された前記環溝８ｂへ負荷側の転がり軸受の外輪９ｂを装着させ、且つ、上記内輪９ａと外輪９ｂとの対向面間に転子９ｃを介装させた態様により、ロータ５がステータ４内において回転自在に枢支されるよう構成する。この構成によりロータ５とモータ軸６と負荷側の軸受３Ａおよび反負荷側の軸受９がそのままの結合状態で下方へ引き抜くことが可能となる。なお、ステータ４内周の前記環溝８ｂの凹設は必須要件ではなく、要は前記外輪９ｂがステータ４の下端部付近の内周へ安定的に装着され得る構造であればよいのである。   An annular groove 8 is recessed in the outer periphery near the lower end of the rotor 5, and the depth thereof is adapted to the inner diameter of the inner ring 9 a of the rolling bearing 9 on the load side described later. An annular groove 8b is recessed in the inner periphery near the lower end of the stator 4 and is recessed very shallowly to match the outer diameter of the outer ring 9b of the rolling bearing 9 on the load side described later. 9 is a load-side rolling bearing, and the inner ring 9a is fitted into the annular groove 8 recessed in the outer periphery near the lower end of the rotor 5, and is recessed in the inner periphery near the lower end of the stator 4. The rotor 5 rotates in the stator 4 by mounting the outer ring 9b of the rolling bearing on the load side in the annular groove 8b and interposing the trochanter 9c between the opposed surfaces of the inner ring 9a and the outer ring 9b. It is configured to be freely pivoted. With this configuration, the rotor 5, the motor shaft 6, the load-side bearing 3A, and the anti-load-side bearing 9 can be withdrawn downward in the combined state. Note that the recess of the annular groove 8b on the inner periphery of the stator 4 is not an essential requirement, and the point is that the outer ring 9b may be structured to be stably mounted on the inner periphery near the lower end portion of the stator 4.

本発明竪型電動ポンプの要部縦断側面図である。It is a principal part vertical side view of the vertical electric pump of this invention. 図１の要部拡大図である。It is a principal part enlarged view of FIG.

符号の説明Explanation of symbols

１ ポンプケーシング
２ オイルケーシング
３ モータフレーム
３Ａ 反負荷側の軸受
３Ｂ ブラケット
４ ステータ
５ ロータ
６ モータ軸
６ａ 導下先端部
７ 羽根車
８ 環溝
８ｂ 環溝
９ 負荷側の転がり軸受
９ａ 内輪
９ｂ 外輪
９ｃ 転子
DESCRIPTION OF SYMBOLS 1 Pump casing 2 Oil casing 3 Motor frame 3A Anti-load side bearing 3B Bracket 4 Stator 5 Rotor 6 Motor shaft 6a Leading tip 7 Impeller 8 Ring groove
8b Ring groove 9 Rolling bearing on the load side 9a Inner ring 9b Outer ring 9c Trochanter

Claims (1)

ポンプケーシングの上方にオイルケーシングを介して立設されたモータフレーム内にステータが収容され、該ステータ内に挿入されたロータの中心から上方へ導出したモータ軸の反負荷側導出部の外周面がモータフレーム上面のブラケットに装着された反負荷側の軸受により支承され、ロータの中心から下方へ導出してポンプケーシング内へ導下したモータ軸の負荷側導出部の導下先端部に羽根車が装着された竪型電動ポンプであって、ロータの下端部付近の外周に凹設された環溝に負荷側の転がり軸受の内輪を嵌着させると共に、ステータの下端部付近の内周に凹設された環溝に負荷側の転がり軸受の外輪を装着させ、且つ上記内輪と外輪との対向面間に転子を介装させた態様により、ロータがステータ内において回転自在に枢支されるよう構成したことを特徴とする竪型電動ポンプ。 A stator is housed in a motor frame that is erected above the pump casing via an oil casing, and the outer peripheral surface of the non-load side lead-out portion of the motor shaft that is led upward from the center of the rotor inserted in the stator is The impeller is supported by a bearing on the anti-load side mounted on the bracket on the upper surface of the motor frame, and the impeller is provided at the leading end of the load side lead-out portion of the motor shaft that is led downward from the center of the rotor and guided into the pump casing. a loaded vertical electric pump, dissipate fitting the inner ring of the load side of the rolling bearing on the outer circumferential recessed been ring groove in the vicinity of the lower end portion of the rotor, recessed in the inner periphery of the vicinity of the lower end portion of the stator are ring grooves to thereby mounted outer ring of the load side of the rolling bearing, and the manner in which is interposed the trochanter between the facing surfaces of the inner ring and the outer ring, the rotor is pivotally supported rotatably in the stator Vertical electric pump, characterized in that the configuration was.
JP2003295955A 2003-08-20 2003-08-20 Vertical electric pump Expired - Fee Related JP4737927B2 (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4737926B2 (en) * 2003-08-20 2011-08-03 株式会社鶴見製作所 Vertical electric pump
JP2008228508A (en) * 2007-03-15 2008-09-25 Jtekt Corp Electric motor and electric pump
JP2011205878A (en) * 2009-12-25 2011-10-13 Canon Anelva Corp Vacuum actuator and substrate transport robot

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58103570U (en) * 1981-12-29 1983-07-14 富士電機株式会社 Frameless squirrel cage rotating electric machine
JPS59167468U (en) * 1983-04-22 1984-11-09 三菱電機株式会社 Bearing device for vertical rotating machine
JPS6126445A (en) * 1984-07-11 1986-02-05 Mitsubishi Electric Corp Vertical underwater motor
JPH02107275U (en) * 1989-02-10 1990-08-27
JPH037671U (en) * 1989-02-17 1991-01-24
JPH06249184A (en) * 1993-02-24 1994-09-06 Shin Meiwa Ind Co Ltd Submergible pump
JPH09510532A (en) * 1994-03-17 1997-10-21 アライド・シグナル・インコーポレーテツド Foil bearings Electric machines and their parts incorporating bearings
JPH1175345A (en) * 1997-08-28 1999-03-16 Ebara Corp Submergible pump
JPH11220860A (en) * 1998-02-02 1999-08-10 Tamagawa Seiki Co Ltd Motor structure
JP2000218585A (en) * 1999-01-29 2000-08-08 Komatsu Ltd Rotary driving gear
JP2002209354A (en) * 2001-01-11 2002-07-26 Ishikawajima Harima Heavy Ind Co Ltd High-speed motor generator
JP2002238205A (en) * 2001-02-13 2002-08-23 Tsurumi Mfg Co Ltd Electrolytic corrosion preventing device of submersible rotating machine
JP2005065465A (en) * 2003-08-20 2005-03-10 Tsurumi Mfg Co Ltd Vertical electric pump
JP2005061377A (en) * 2003-08-20 2005-03-10 Tsurumi Mfg Co Ltd Vertical type electric pump

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58103570U (en) * 1981-12-29 1983-07-14 富士電機株式会社 Frameless squirrel cage rotating electric machine
JPS59167468U (en) * 1983-04-22 1984-11-09 三菱電機株式会社 Bearing device for vertical rotating machine
JPS6126445A (en) * 1984-07-11 1986-02-05 Mitsubishi Electric Corp Vertical underwater motor
JPH02107275U (en) * 1989-02-10 1990-08-27
JPH037671U (en) * 1989-02-17 1991-01-24
JPH06249184A (en) * 1993-02-24 1994-09-06 Shin Meiwa Ind Co Ltd Submergible pump
JPH09510532A (en) * 1994-03-17 1997-10-21 アライド・シグナル・インコーポレーテツド Foil bearings Electric machines and their parts incorporating bearings
JPH1175345A (en) * 1997-08-28 1999-03-16 Ebara Corp Submergible pump
JPH11220860A (en) * 1998-02-02 1999-08-10 Tamagawa Seiki Co Ltd Motor structure
JP2000218585A (en) * 1999-01-29 2000-08-08 Komatsu Ltd Rotary driving gear
JP2002209354A (en) * 2001-01-11 2002-07-26 Ishikawajima Harima Heavy Ind Co Ltd High-speed motor generator
JP2002238205A (en) * 2001-02-13 2002-08-23 Tsurumi Mfg Co Ltd Electrolytic corrosion preventing device of submersible rotating machine
JP2005065465A (en) * 2003-08-20 2005-03-10 Tsurumi Mfg Co Ltd Vertical electric pump
JP2005061377A (en) * 2003-08-20 2005-03-10 Tsurumi Mfg Co Ltd Vertical type electric pump

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