JP4480836B2 - Shaft seal unit for electric pump - Google Patents

Shaft seal unit for electric pump Download PDF

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Publication number
JP4480836B2
JP4480836B2 JP2000029589A JP2000029589A JP4480836B2 JP 4480836 B2 JP4480836 B2 JP 4480836B2 JP 2000029589 A JP2000029589 A JP 2000029589A JP 2000029589 A JP2000029589 A JP 2000029589A JP 4480836 B2 JP4480836 B2 JP 4480836B2
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Japan
Prior art keywords
oil
oil tank
shaft seal
ring
flange
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JP2000029589A
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JP2001221190A (en
Inventor
泰人 窪
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Tsurumi Manufacturing Co Ltd
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Tsurumi Manufacturing Co Ltd
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Description

【０００１】
【発明の技術分野】
本発明は、モータフレーム下面とポンプケーシング上面との間に形成される空間部へ着脱可能に介装させる電動ポンプ用軸封ユニットに関するものである。
【０００２】
【従来技術とその問題点】
従来、電動ポンプに装着されるダブル型軸封装置は図８に示すよう、モータフレーム下面とポンプケーシング上面との間に設けられたオイル室１０９内において、ポンプ軸１０４の外周に嵌装されたダブル型軸封装置１０７の上部メイティリング１１１Ａをベアリングブラケット１１８の下面に嵌着して支承させ、下部メイティリング１１１Ｂをポンプケーシング１０３の上壁上面に嵌着して支承させ、コイルスプリング１１２のバネ圧により上部シールリング１１３Ａを上部メイティリング１１１Ａに圧接させると共に下部シールリング１１３Ｂを下部メイティリング１１１Ｂに圧接させ、これら圧接部が摺動密封面を構成するように組立られている。
【０００３】
しかしその組立には特殊な組立工具や治具等が必要であると共に作業者の熟練度が要求される。また、ダブル型軸封装置１０７の取付長Ｈ１の精度を確保するためには、ベアリングブラケット１１８やポンプケーシング１０３の上壁等における軸封部材の嵌着面に高精度な研削加工を施さなければならず、上記作業者に熟練度が要求されることと相まって電動ポンプの製造コストを押し上げる要因となっている。
【０００４】
【発明の目的】
本発明は、ダブル型軸封装置を電動ポンプに装着させるについて、従来のよにベアリングブラケットやポンプケーシング上壁等における軸封部材の嵌着面に高精度な研削加工を施すことなく、ダブル型軸封装置の取付長の精度が確保でき、また、特殊な組立工具や治具等を必要とすることなく且つ作業者の熟練度に依存することなく、ポンプの使用現場においても、非熟練者でも容易に装着できる軸封ユニットを提供することにより、電動ポンプの製造コスト引き下げに寄与しょうとするものである。
【０００５】
【発明の構成】
本発明に係る電動ポンプ用軸封ユニットは、モータフレーム下面とポンプケーシング上面との間に形成された空間部へ着脱可能に介装させる電動ポンプ用軸封ユニットであって、上記空間部を貫通するポンプ軸へ挿脱可能に嵌着される円筒状軸スリーブの外周にダブル型軸封装置を嵌装させてその外周をオイルタンクで囲繞し、オイルタンクの上蓋下面に凹設された上部環溝にダブル型軸封装置の上部メイティリングを嵌着させ、オイルタンクの下壁上面に凹設された下部環溝にダブル型軸封装置の下部メイティリングを嵌着させて該メイティリングの回り止め用押え板を下部環溝の周壁上面へ定着させ、ダブル型軸封装置を囲んでオイルタンク内に立設される円筒状壁体の内周面にポンプ軸回転方向に向って上り勾配の傾斜面を形成するようガイドベーンを定着させ、円筒状壁体の下縁部には外側方向へ突出するフランジを付設して該フランジの下面を前記回り止め用押え板の上面へ定着させ、且つ円筒状壁体の下方部にガイドベーンの下端部裏側とオイル室とを導通させるオイル流入用横穴を開設し、円筒状壁体の上縁部を上部メイティリングとシールリングとの摺動面よりも上方においてオイルタンク上壁に接近させて内側方向へ突出するフランジを付設し、該フランジ上面と上部環溝の周壁下面との対向面間にオイル流出用の環状溝隙を形成させ、オイルタンクの周壁上縁部にモータフレーム下面へ当接する取付座を付設した。
【０００６】
【実施例】
以下実施例の図１乃至図７により説明をする。
【０００７】
１はモータフレーム２の下面とポンプケーシング３の上面との間に形成された空間部、４はポンプモータ５から導下されてポンプケーシング３内に達するポンプ軸、６は該ポンプ軸４へ挿脱可能に嵌着される構造に形成された円筒状軸スリーブ、７は該軸スリーブ６の外周に嵌装されたダブル型軸封装置、８は該ダブル型軸封装置７の外周にオイル室９を形成するよう繞設された環状のオイルタンクである。オイルタンク８の上蓋８Ａ下面に凹設された上部環溝１０Ａには上部メイティリング１１Ａの外周面を嵌着して支承させ、下壁８Ｂ上面に凹設された下部環溝１０Ｂには下部メイティリング１１Ｂの外周面を嵌着して支承させ、ポンプ軸４の回転方向と反対方向に巻き上げられたコイルスプリング１２のバネ圧により、上部シールリング１３Ａを上部メイティリング１１Ａに圧接させると共に下部シールリング１３Ｂを下部メイティリング１１Ｂに圧接させ、これら圧接部が摺動密封面を構成するように組立られる。１５はダブル型軸封装置７を囲んでオイルタンク８内に立設される円筒状壁体、Ｇは該円筒状壁体１５の内周面にポンプ軸４の回転方向に向って上り勾配の傾斜面を形成するよう定着されたガイドベーンであり、ポンプの運転中においてオイルの掻揚げ作用を司るものである。円筒状壁体１５の下縁部には外側方向へ突出するフランジＦ２を付設して該フランジＦ２の下面が、下部メイティリング１１Ｂを嵌着させた下部環溝１０Ｂの周壁上面へ直接定着され、または下部メイティリング１１Ｂの回り止め用環状押え板１６を介して定着されるよう形成し、且つ円筒状壁体１５の下方部にガイドベーンＧの下端部裏側とオイル室９とを導通させるオイル流入用横穴１７Ｂを開設する。前記押え板１６の内周縁部には係止爪ｆが下方へ打ち出されてあり、該係止爪ｆを下部メイティリング１１Ｂ上面の切り込部へ係止させた態様で下部環溝１０Ｂの周壁上面へ定着させるのであるが、押え板１６を用いない場合には、円筒状壁体１５の下方部から導下された係止爪（図示せず）を下部メイティリング１１Ｂ上面の切り込部へ係止させてフランジＦ２を下部環溝１０Ｂの周壁上面へ定着させる。円筒状壁体１５の上縁部は上部メイティリング１１Ａと上部シールリング１３Ａとの摺動面１４Ａよりも上方において、オイルタンク上壁８Ａに接近させて内側方向へ突出する空気巻き込み防止用フランジＦ１を付設し、該フランジＦ１上面と上部環溝１０Ａ下面との対向面間にオイル流出用の環状溝隙１７Ａを形成させるのであが、上記対向面間の間隔Ｈ１を０．５ｍｍ乃至３ｍｍの範囲内に調整しておくことで環状溝隙１７Ａ内における油膜の形成が容易となり、また、フランジＦ１内周面と上部シールリング１３Ａの外周面との間隔Ｈ２を１ｍｍ乃至３ｍｍの範囲内に設定しておくことでガイドベーンＧによる潤滑油の押し上げ作用が有効に機能すると共に上部摺動面１４Ａへの潤滑油の誘導を円滑に行わせることができる。１９はオイルタンク８の周壁上縁部に付設された取付座で、例えばベアリングブラケット１８の裏面等を利用してモータフレーム２の下面へ当接するよう形成されている。
【０００８】
図１に示すよう構成された本発明軸封ユニットを電動ポンプに装着させるについては、図２に示すようポンプケーシング３および羽根車２０から分離させたポンプ軸４に円筒状軸スリーブ６を嵌着させ、取付ネジ２１を用いて取付座１９をベアリングブラケット１８の裏面へ定着させたのち、図３に示すようモータフレーム２にポンプケーシング３を結合させれば、モータフレーム下面とポンプケーシング上面との間に形成される空間部１にオイルタンク８が介装されると共にポンプ軸４の外周には軸スリーブ６を介してダブル型軸封装置７が嵌装されることになる。実施例の図面には圧抜方式の電動ポンプが示されているが、オイルバス方式の電動ポンプにおいても上述の軸封ユニットの装着手順は同じである。
【０００９】
【作用】
オイル室９内には潤滑油が封入されるが、その封入量はオイル室９の全容積の８０％程度とし、油面２２上には空気留り２３が形成されている。そしてポンプ運転時にはポンプ軸４の回転に伴い、上下シールリング１３Ａ，１３Ｂの背向面間に張設されているコイルスプリング１２も円筒状壁体１５内で回転し、円筒状壁体１５の外側におけるオイル室９内の潤滑油が下部のオイル流入用横穴１７Ｂから円筒状壁体１５の内部へ流入し、下部の摺動面１４Ｂを潤滑させると共に該摺動面１４Ｂに発生する摺動熱を吸収しつつガイドベーンＧの傾斜面に沿って押し上げられ、空気巻き込み防止用フランジＦ１の裏面に沿って軸心方向へ移動して上部の摺動面１４Ａを潤滑させると共に該摺動面１４Ａに発生する摺動熱を吸収し、フランジＦ１の内周縁から環状溝隙１７Ａ内へ至り該環状溝隙１７Ａ内で表面張力により油膜を形成して空気の侵入を阻止しつつ円筒状壁体１５外側のオイル室９内へ移送されるのであるが、上記オイル流出用の環状溝隙１７Ａは、フランジＦ１上面と上部環溝１０Ａ周壁下面とが環状平面同士で対向することにより構成されているため、油膜の形成によって空気の巻き込みを阻止し得られ、ポンプ軸４の回転速度変化に関係なく有効に機能し、特に０．５ｍｍ乃至３ｍｍの範囲内に設定すればその効果を一段と高めることができる。また、フランジＦ１内周面と上部シールリング１３Ａ外周面との間隔を１ｍｍ乃至３ｍｍの範囲に設定することにより、ガイドベーンＧによるオイルの循環効率を高めると共に上部摺動面１４Ａへの潤滑油の誘導が円滑に行われるこになる。
【００１０】
【発明の効果】
本発明によれば、ダブル型軸封装置とオイルタンクがユニット化されており、従来のようにベアリングブラケットやポンプケーシング上壁等における軸封部材の嵌着面に高精度な研削加工を施すことを要せず、ダブル型軸封装置の取付長の精度が確保でき、且つ、特殊な組立工具や治具等を必要とすることなくポンプの使用現場においても、また、非熟練者であっても容易に装着できるので、電動ポンプの製造コスト引き下げにも寄与することになる。更にまた、オイルタンクを鋼板材で肉薄に構成できるので、放熱性が良好となりオイルの冷却効果を高められるという効果もある。
【００１１】
また、本発明軸封ユニットを用いることにより、電動ポンプにおけるオイル室内中央部から周壁方向への潤滑油の散逸を確実に防止できると共に、オイル流出用環状溝隙への油膜形成作用によってポンプ軸の回転数変化には関係なく潤滑油中への空気の混合を生じさせることなく、軸封装置の有効な潤滑と冷却作用が行われるという利点がある。
【図面の簡単な説明】
【図１】 本発明軸封ユニットの縦断側面図である。
【図２】 本発明軸封ユニットをモータフレーム下面に装着させた状態を示す要部縦断側面図である。
【図３】 本発明軸封ユニットを介装させた電動ポンプの要部縦断側面図である。
【図４】 本発明軸封ユニットにおける円筒状壁体の縦断側面図である。
【図５】 本発明軸封ユニットにおける円筒状壁体の底面図である。
【図６】 本発明軸封ユニットにおける環状押え板の縦断側面図である。
【図７】 本発明軸封ユニットにおける環状押え板のの底面図である。
【図８】 従来のダブル型軸封装置を装着させた電動ポンプの要部縦断側面図である。
【符号の説明】
１ 空間部
２ モータフレーム
３ ポンプケーシング
４ ポンプ軸
６ 軸スリーブ
７ ダブル型軸封装置
８ オイルタンク
８Ａ オイルタンクの上蓋
８Ｂ オイルタンクの下壁
９ オイル室
１０Ａ 上部環溝
１０Ｂ 下部環溝
１１Ａ 上部メイティリング
１１Ｂ 下部メイティリング
１３Ａ 上部シールリング
１３Ｂ 下部シールリング
１４Ａ 上部摺動面
１４Ｂ 下部摺動面
１５ 円筒状壁体
１６ 環状押え板
１７Ａ オイル流出用環状溝隙
１７Ｂ オイル流入用横穴
１９ 取付座
Ｆ１ 内側方向へ突出するフランジ
Ｆ２ 外側方向へ突出するフランジ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shaft seal unit for an electric pump that is detachably interposed in a space formed between a motor frame lower surface and a pump casing upper surface.
[0002]
[Prior art and its problems]
Conventionally, as shown in FIG. 8, the double shaft seal device mounted on the electric pump is fitted on the outer periphery of the pump shaft 104 in an oil chamber 109 provided between the lower surface of the motor frame and the upper surface of the pump casing. The upper mating ring 111A of the double shaft seal device 107 is fitted and supported on the lower surface of the bearing bracket 118, and the lower mating ring 111B is fitted and supported on the upper surface of the upper wall of the pump casing 103, and the spring of the coil spring 112 is supported. The upper seal ring 113A is brought into pressure contact with the upper mating ring 111A by pressure and the lower seal ring 113B is brought into pressure contact with the lower mating ring 111B, and these pressure contact portions constitute a sliding sealing surface.
[0003]
However, the assembly requires special assembly tools, jigs, and the like and requires skill of the operator. Further, in order to ensure the accuracy of the mounting length H1 of the double shaft seal device 107, high precision grinding must be performed on the fitting surface of the shaft seal member on the bearing bracket 118, the upper wall of the pump casing 103, and the like. In other words, coupled with the requirement for skill of the operator, this increases the manufacturing cost of the electric pump.
[0004]
OBJECT OF THE INVENTION
The present invention relates to mounting a double-type shaft seal device on an electric pump, and does not perform high-precision grinding on a fitting surface of a shaft seal member on a bearing bracket, an upper wall of a pump casing or the like as in the past. Non-experts can be secured at the site where the pump is used without the need for special assembly tools and jigs and without depending on the skill level of the operator. However, by providing a shaft seal unit that can be easily installed, the company intends to contribute to reducing the manufacturing cost of electric pumps.
[0005]
[Structure of the invention]
An electric pump shaft seal unit according to the present invention is an electric pump shaft seal unit that is detachably interposed in a space formed between a motor frame lower surface and a pump casing upper surface, and penetrates the space portion. A double-type shaft seal device is fitted on the outer periphery of a cylindrical shaft sleeve that is removably fitted to the pump shaft, and the outer periphery is surrounded by an oil tank. The upper ring is recessed on the lower surface of the upper lid of the oil tank. to fitting the upper main tilling double type shaft sealing device in the groove, around the main tilling by fitting the lower main tilling double type shaft sealing device in the lower ring groove which is recessed in the bottom wall upper surface of the oil tank The holding plate for fixing is fixed to the upper surface of the peripheral wall of the lower annular groove, and the inner wall surface of the cylindrical wall body standing upright in the oil tank surrounding the double-type shaft sealing device is inclined upward in the pump shaft rotation direction. I will form an inclined surface To fix the guide vanes, the lower the lower edge of the cylindrical wall and attaching a flange projecting outwardly to fix the lower surface of the flange to the upper surface of the rotation stop pressing plate and the cylindrical wall A horizontal hole for oil inflow that connects the back of the lower end of the guide vane and the oil chamber is established in the upper part, and the upper edge of the cylindrical wall is above the oil tank above the sliding surface of the upper mating ring and seal ring. A flange that protrudes inward and close to the wall is provided, and an annular groove for oil outflow is formed between the upper surface of the flange and the lower surface of the peripheral wall of the upper annular groove, and the upper edge of the peripheral wall of the oil tank. and attaching a mounting seat which abuts the motor frame underside.
[0006]
【Example】
The embodiment will be described below with reference to FIGS.
[0007]
1 is a space formed between the lower surface of the motor frame 2 and the upper surface of the pump casing 3, 4 is a pump shaft guided from the pump motor 5 to reach the pump casing 3, and 6 is inserted into the pump shaft 4. A cylindrical shaft sleeve formed in a structure that can be removably fitted, 7 is a double-type shaft seal device fitted on the outer periphery of the shaft sleeve 6, and 8 is an oil chamber on the outer periphery of the double-type shaft seal device 7. 9 is an annular oil tank that is installed so as to form the shape 9. The upper ring groove 10A recessed on the lower surface of the upper lid 8A of the oil tank 8 is fitted and supported by the outer peripheral surface of the upper mating ring 11A, and the lower ring groove 10B recessed on the upper surface of the lower wall 8B is supported on the lower ring groove 10B. The outer seal surface of the ring 11B is fitted and supported, and the upper seal ring 13A is pressed against the upper mating ring 11A by the spring pressure of the coil spring 12 wound up in the direction opposite to the rotation direction of the pump shaft 4, and the lower seal ring 13B is brought into pressure contact with the lower mating ring 11B, and these pressure contact parts are assembled so as to constitute a sliding sealing surface. Reference numeral 15 denotes a cylindrical wall body standing upright in the oil tank 8 so as to surround the double-type shaft sealing device 7, and G is an upward slope on the inner peripheral surface of the cylindrical wall body 15 in the rotational direction of the pump shaft 4. This guide vane is fixed so as to form an inclined surface, and is responsible for the oil-raising action during operation of the pump. A flange F2 projecting outward is attached to the lower edge of the cylindrical wall body 15, and the lower surface of the flange F2 is directly fixed to the upper surface of the peripheral wall of the lower annular groove 10B in which the lower mating ring 11B is fitted, Alternatively, an oil inflow is formed so that the lower mating ring 11B is fixed via the rotation-preventing annular presser plate 16 and the lower end of the guide vane G and the oil chamber 9 are electrically connected to the lower part of the cylindrical wall body 15. Open side hole 17B. A locking claw f is punched downward on the inner peripheral edge of the presser plate 16, and the peripheral wall of the lower annular groove 10B is engaged with the notch on the upper surface of the lower mating ring 11B. When the presser plate 16 is not used, the locking claw (not shown) guided from the lower part of the cylindrical wall 15 is inserted into the notch on the upper surface of the lower mating ring 11B. The flange F2 is fixed to the upper surface of the peripheral wall of the lower annular groove 10B by locking. The upper edge of the cylindrical wall 15 is above the sliding surface 14A between the upper mating ring 11A and the upper seal ring 13A, and approaches the oil tank upper wall 8A so as to protrude inward and to prevent the air entrainment flange F1. And an annular groove 17A for oil outflow is formed between the opposed surfaces of the upper surface of the flange F1 and the lower surface of the upper annular groove 10A. The interval H1 between the opposed surfaces is in the range of 0.5 mm to 3 mm. By adjusting inward, it becomes easy to form an oil film in the annular groove 17A, and the interval H2 between the inner peripheral surface of the flange F1 and the outer peripheral surface of the upper seal ring 13A is set within a range of 1 mm to 3 mm. By doing so, the pushing-up action of the lubricating oil by the guide vane G functions effectively, and the lubricating oil can be smoothly guided to the upper sliding surface 14A. Reference numeral 19 denotes a mounting seat attached to the upper edge portion of the peripheral wall of the oil tank 8 and is formed so as to contact the lower surface of the motor frame 2 by using, for example, the back surface of the bearing bracket 18.
[0008]
For mounting the shaft seal unit of the present invention configured as shown in FIG. 1 on an electric pump, a cylindrical shaft sleeve 6 is fitted to the pump shaft 4 separated from the pump casing 3 and the impeller 20 as shown in FIG. Then, after fixing the mounting seat 19 to the back surface of the bearing bracket 18 using the mounting screws 21, if the pump casing 3 is coupled to the motor frame 2 as shown in FIG. 3, the lower surface of the motor frame and the upper surface of the pump casing are An oil tank 8 is interposed in the space 1 formed therebetween, and a double shaft seal device 7 is fitted on the outer periphery of the pump shaft 4 via a shaft sleeve 6. Although the drawing type electric pump is shown in the drawings of the embodiment, the above-described procedure for mounting the shaft seal unit is the same in the oil bath type electric pump.
[0009]
[Action]
Lubricating oil is sealed in the oil chamber 9, and the amount of sealing oil is about 80% of the total volume of the oil chamber 9, and an air retainer 23 is formed on the oil surface 22. When the pump shaft 4 rotates, the coil spring 12 stretched between the back surfaces of the upper and lower seal rings 13A and 13B also rotates in the cylindrical wall body 15 and rotates outside the cylindrical wall body 15. The lubricating oil in the oil chamber 9 flows into the cylindrical wall 15 from the lower oil inflow lateral hole 17B, lubricates the lower sliding surface 14B, and generates sliding heat generated on the sliding surface 14B. While being absorbed, it is pushed up along the inclined surface of the guide vane G, moves in the axial direction along the back surface of the air entrainment prevention flange F1, lubricates the upper sliding surface 14A, and is generated on the sliding surface 14A. The sliding heat is absorbed and reaches the annular groove 17A from the inner peripheral edge of the flange F1, and an oil film is formed by surface tension in the annular groove 17A to prevent the air from entering while preventing the intrusion of air. Oil chamber Although the annular groove gap 17A for oil outflow is formed by the flange F1 upper surface and the upper annular groove 10A peripheral wall lower surface facing each other between the annular planes, the oil film is formed. It is possible to prevent the air from being involved, and it functions effectively regardless of the change in the rotational speed of the pump shaft 4, and the effect can be further enhanced if it is set within the range of 0.5 mm to 3 mm. Further, by setting the distance between the inner peripheral surface of the flange F1 and the outer peripheral surface of the upper seal ring 13A within a range of 1 mm to 3 mm, the oil circulation efficiency by the guide vane G is improved and the lubricating oil is applied to the upper sliding surface 14A. Guidance will be performed smoothly.
[0010]
【The invention's effect】
According to the present invention, the double-type shaft seal device and the oil tank are unitized, and the mounting surface of the shaft seal member on the bearing bracket, the pump casing upper wall, etc. is subjected to high-precision grinding as in the past. It is possible to ensure the accuracy of the installation length of the double type shaft seal device, and at the site of use of the pump without requiring special assembly tools or jigs, etc. Can also be easily mounted, which contributes to a reduction in the manufacturing cost of the electric pump. Furthermore, since the oil tank can be made thin with a steel plate material, there is an effect that heat dissipation is improved and the oil cooling effect can be enhanced.
[0011]
Further, by using the shaft seal unit of the present invention, it is possible to surely prevent the lubricating oil from escaping from the central portion of the oil chamber in the electric pump toward the circumferential wall, and to form the pump shaft by the oil film forming action on the annular groove for oil outflow. There is an advantage that effective lubrication and cooling of the shaft seal device can be performed without causing air mixing in the lubricating oil regardless of changes in the rotational speed.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a shaft seal unit of the present invention.
FIG. 2 is a longitudinal side view of a main part showing a state in which the shaft seal unit of the present invention is mounted on the lower surface of a motor frame.
FIG. 3 is a longitudinal sectional side view of a main part of an electric pump having a shaft seal unit according to the present invention interposed therebetween.
FIG. 4 is a longitudinal side view of a cylindrical wall body in the shaft seal unit of the present invention.
FIG. 5 is a bottom view of a cylindrical wall body in the shaft seal unit of the present invention.
FIG. 6 is a longitudinal side view of an annular presser plate in the shaft seal unit of the present invention.
FIG. 7 is a bottom view of an annular presser plate in the shaft seal unit of the present invention.
FIG. 8 is a longitudinal side view of a main part of an electric pump equipped with a conventional double shaft seal device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Space part 2 Motor frame 3 Pump casing 4 Pump shaft 6 Shaft sleeve 7 Double type shaft seal device 8 Oil tank 8A Oil tank upper lid 8B Oil tank lower wall 9 Oil chamber 10A Upper ring groove 10B Lower ring groove 11A Upper mating ring 11B Lower mating ring 13A Upper seal ring 13B Lower seal ring 14A Upper sliding surface 14B Lower sliding surface 15 Cylindrical wall 16 Annular retainer plate 17A Oil outlet annular groove 17B Oil inlet lateral hole 19 Mounting seat F1 Inward Protruding flange F2 Flange protruding outward

Claims (1)

モータフレーム下面とポンプケーシング上面との間に形成される空間部へ着脱可能に介装させる電動ポンプ用軸封ユニットであって、上記空間部を貫通するポンプ軸へ挿脱可能に嵌着される円筒状軸スリーブの外周にダブル型軸封装置を嵌装させてその外周をオイルタンクで囲繞し、オイルタンクの上蓋下面に凹設された上部環溝にダブル型軸封装置の上部メイティリングを嵌着させ、オイルタンクの下壁上面に凹設された下部環溝にダブル型軸封装置の下部メイティリングを嵌着させて該メイティリングの回り止め用押え板を下部環溝の周壁上面へ定着させ、ダブル型軸封装置を囲んでオイルタンク内に立設される円筒状壁体の内周面にポンプ軸回転方向に向って上り勾配の傾斜面を形成するようガイドベーンを定着させ、円筒状壁体の下縁部には外側方向へ突出するフランジを付設して該フランジの下面を前記回り止め用押え板の上面へ定着させ、且つ円筒状壁体の下方部にガイドベーンの下端部裏側とオイル室とを導通させるオイル流入用横穴を開設し、円筒状壁体の上縁部を上部メイティリングとシールリングとの摺動面よりも上方においてオイルタンク上壁に接近させて内側方向へ突出するフランジを付設し、該フランジ上面と上部環溝の周壁下面との対向面間にオイル流出用の環状溝隙を形成させ、オイルタンクの周壁上縁部にモータフレーム下面へ当接する取付座を付設したことを特徴とする、電動ポンプ用軸封ユニット。  An electric pump shaft sealing unit that is detachably interposed in a space formed between a motor frame lower surface and a pump casing upper surface, and is detachably fitted to a pump shaft that penetrates the space. A double-type shaft seal device is fitted on the outer periphery of the cylindrical shaft sleeve, the outer periphery is surrounded by an oil tank, and the upper mating ring of the double-type shaft seal device is attached to the upper annular groove formed in the lower surface of the upper lid of the oil tank. Fit the lower mating ring of the double-type shaft seal device into the lower ring groove recessed in the upper surface of the lower wall of the oil tank, and the retaining plate for rotation prevention of the mating ring to the upper surface of the peripheral wall of the lower ring groove Fixing, fixing the guide vane so as to form an inclined surface with an upward slope toward the rotation direction of the pump shaft on the inner peripheral surface of the cylindrical wall body standing upright in the oil tank surrounding the double-type shaft sealing device, Under the cylindrical wall A flange projecting outward is attached to the part, and the lower surface of the flange is fixed to the upper surface of the detent holding plate, and the lower side of the lower end of the guide vane and the oil chamber are provided below the cylindrical wall body. An oil inflow lateral hole is opened, and a flange that protrudes inward is provided with the upper edge of the cylindrical wall approaching the oil tank upper wall above the sliding surface of the upper mating ring and seal ring. An annular groove for oil outflow is formed between the upper surface of the flange and the lower surface of the peripheral wall of the upper annular groove, and a mounting seat that contacts the lower surface of the motor frame is attached to the upper edge of the peripheral wall of the oil tank. A shaft seal unit for an electric pump.
JP2000029589A 2000-02-07 2000-02-07 Shaft seal unit for electric pump Expired - Lifetime JP4480836B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103334950A (en) * 2013-07-12 2013-10-02 昆山新莱洁净应用材料股份有限公司 Inner moving ring balanced load type mechanical sealing mechanism

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6641140B1 (en) * 2000-07-19 2003-11-04 Tsurumi Manufacturing Co., Ltd. Apparatus for retaining lubrication oil at sliding surface of shaft seal device disposed within oil chamber of submersible pump
JP5656773B2 (en) * 2011-08-26 2015-01-21 株式会社鶴見製作所 Water removal method by oil-water separation of shaft seal device for submersible motor pump and its device
KR101743008B1 (en) * 2017-03-07 2017-06-15 주식회사 에스피케이 Vertical centrifugal pump
JP7161876B2 (en) * 2018-07-17 2022-10-27 株式会社クボタ OIL LIFTER, PUMP DEVICE, AND OIL LIFTER MANUFACTURING METHOD

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JPS5237143U (en) * 1975-09-09 1977-03-16
JPH01261568A (en) * 1988-04-11 1989-10-18 Nippon Pillar Packing Co Ltd Cartridge type mechanical seal
JPH0462391U (en) * 1990-10-02 1992-05-28
JPH04106566U (en) * 1991-02-28 1992-09-14 イーグル工業株式会社 double type mechanical seal
JPH1144364A (en) * 1997-07-26 1999-02-16 Tsurumi Mfg Co Ltd Lubricating oil holding device for oil chamber inside shaft seal device slidingly movable surface in submerged pump

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JPS5237143U (en) * 1975-09-09 1977-03-16
JPH01261568A (en) * 1988-04-11 1989-10-18 Nippon Pillar Packing Co Ltd Cartridge type mechanical seal
JPH0462391U (en) * 1990-10-02 1992-05-28
JPH04106566U (en) * 1991-02-28 1992-09-14 イーグル工業株式会社 double type mechanical seal
JPH1144364A (en) * 1997-07-26 1999-02-16 Tsurumi Mfg Co Ltd Lubricating oil holding device for oil chamber inside shaft seal device slidingly movable surface in submerged pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103334950A (en) * 2013-07-12 2013-10-02 昆山新莱洁净应用材料股份有限公司 Inner moving ring balanced load type mechanical sealing mechanism

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