JPS62182496A - Gas seal type canned motor pump - Google Patents
Gas seal type canned motor pumpInfo
- Publication number
- JPS62182496A JPS62182496A JP2556786A JP2556786A JPS62182496A JP S62182496 A JPS62182496 A JP S62182496A JP 2556786 A JP2556786 A JP 2556786A JP 2556786 A JP2556786 A JP 2556786A JP S62182496 A JPS62182496 A JP S62182496A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- pump
- chamber
- seal
- gas seal
- 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
Links
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 230000035515 penetration Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 abstract description 3
- 230000008595 infiltration Effects 0.000 abstract description 2
- 238000001764 infiltration Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 159
- 238000005192 partition Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 240000000489 Agave utahensis Species 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000005046 Chlorosilane Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- KOPOQZFJUQMUML-UHFFFAOYSA-N chlorosilane Chemical compound Cl[SiH3] KOPOQZFJUQMUML-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（発明の目的）
（産業上の利用分野〉
本発明は、ガスシール型キャンドモータポンプに係り、
キャンドモータ部のロータ室とガスシール室とを軸封す
るメカニカルシールにポンプ取扱液が直接または間接に
接触してポンプ故障に至るのを阻止したポンプに関する
。[Detailed description of the invention] (Object of the invention) (Industrial application field) The present invention relates to a gas seal type canned motor pump,
The present invention relates to a pump that prevents pump handling liquid from coming into direct or indirect contact with a mechanical seal that seals a rotor chamber and a gas seal chamber of a canned motor section, resulting in pump failure.
（従来の技術）
一般に、キャンドモータポンプは、ポンプ取扱液の一部
をキャンドモータ部に循環さＵ゛ることによって、キャ
ンドモータ部の冷却と軸受の潤滑を行っているが、スラ
リー含有液、高粘度液、重合やゲル化を生じ易い液およ
び特に軸受に対する腐蝕性の高い液などポンプ取扱液を
キャンドモータ部へ循環さけると故障の原因となる場合
は、ガスシール型キャンドモータポンプが採用されてい
る。(Prior Art) Generally, canned motor pumps cool the canned motor part and lubricate the bearings by circulating a part of the liquid handled by the pump to the canned motor part. If pump handling liquids such as high viscosity liquids, liquids that tend to polymerize or gel, and liquids that are particularly corrosive to bearings may cause malfunctions if they are not circulated to the canned motor section, a gas-sealed canned motor pump is used. ing.
このガスシール型キャンドモータポンプは、第４図に示
すように、ポンプ部１の上側にガスシール室２を介して
キセンドモータ８Ｉ１３が気密に−体に１部成され、こ
の−Ｖセンドモータ部３のロータ卒４ど前記ガスシール
室２とがメＪ」ニカルシール５にて軸封されており、前
記ガスシール室２に１１人されたガス６によって１−Ｉ
Ｉンド七−９部３がポンプ取扱液７がら遮断されること
により、並びに前記メカニカルシール５のロータ室４側
の圧力がガスシール室２側の圧力よりｂ高くなるように
、前記Ｉ］−タ室４および土部ボット８と熱交換器９に
１・１人された清澄に（液１０が補助インペラ１１にて
加圧されてキャンドモータ部３を循環されることににす
、基本的にはポンプ取扱液７がキャンドモータ部３へ浸
入されない構成となっている。In this gas seal type canned motor pump, as shown in FIG. The shaft of the rotor is sealed with the gas seal chamber 2 by a mechanical seal 5, and the gas 6 supplied to the gas seal chamber 2
The above I]- The liquid 10 is pressurized by the auxiliary impeller 11 and circulated through the canned motor part 3. The structure is such that the pump handling liquid 7 does not enter the canned motor section 3.
ところで、このガスシール型キャンド七−タ・１ぐンブ
には、ポンプ起動時の急激な圧力変化によって、並びに
ポンプ運転中においては、回転＠１２０回転に伴って１
じるガスシール室２のポンプ取扱液７の擾乱によって、
ガスシール室２のガス６がポンプ取扱液７に混入され、
回転軸１２に沿ってポンプ部１へ漏出されるため、ガス
シール室２に封入されたガス６ｉ’ｄが短時間のうちに
減少されてガスシール全２のポンプ取扱液７の液面が上
界され、ポンプ取扱液７が■ヤントモータ部３へ浸入さ
れる問題、丈なわら液面上昇の問題があった。By the way, this gas-seal type canned 7-ta-1 gun is caused by sudden pressure changes when starting the pump, and during pump operation due to the rotation @120 rotations.
Due to the disturbance of the pump handling liquid 7 in the gas seal chamber 2,
The gas 6 in the gas seal chamber 2 is mixed into the pump handling liquid 7,
Since the gas 6i'd sealed in the gas seal chamber 2 is leaked to the pump part 1 along the rotating shaft 12, the gas 6i'd sealed in the gas seal chamber 2 is reduced in a short time, and the liquid level of the pump handling liquid 7 in all the gas seals 2 is raised. There was a problem that the liquid 7 handled by the pump entered the Yant motor section 3 due to the leakage, and that the liquid level rose considerably.
そこで本特許出願人は実公昭４５−８２８５号公報に記
載されている縦’１１１−センドモータポンプを提案し
ている。このキャンドモータポンプは前記第４図に示す
ようにガスシール室２に複数の邪魔板１３を放射状に設
けた構造が採られている。Therefore, the applicant of this patent has proposed a vertical '111-send motor pump described in Japanese Utility Model Publication No. 45-8285. As shown in FIG. 4, this canned motor pump has a structure in which a plurality of baffle plates 13 are provided radially in the gas seal chamber 2.
また実公昭５７−２２０７２弓公報に記載のガスシール
型ヤヤンドモータボンブが知られている。Further, a gas seal type Yayando motor bomb described in Japanese Utility Model Publication No. 57-22072 is known.
この翻ヤントモータポンプは第５図に示すようにガスシ
ール室２とポンプ室１４との間に設けた軸貫通部１５に
ガスシール室２側に延在するスリーブ１６を設け、この
スリーブ１６によって形成された軸貫油部間隙１７とガ
スシール室２とを連通ずる流体通孔１８．１’ｌをスリ
ーブ１６の基部と上端部とにそれぞれ複数個穿設した構
造が採られている。As shown in FIG. 5, this inversion motor pump is provided with a sleeve 16 extending toward the gas seal chamber 2 in a shaft penetrating portion 15 provided between the gas seal chamber 2 and the pump chamber 14. A structure is adopted in which a plurality of fluid passage holes 18.1'l are formed in the base and upper end of the sleeve 16, respectively, to communicate the formed through-shaft oil gap 17 and the gas seal chamber 2.
（発明が解決しようとする問題点）
これら従来のＭ４造によると、邪魔板１３まＩζはスリ
ーブ１６の作用により、ガスシール室２のポンプ取扱液
７に回転軸１２の回転に伴う擾乱が生じなので、ガスシ
ール室２の液面上界の問題は一部のポンプ取扱液７に対
しては実用上困難を生じない程度に大幅に改善されるも
のの完全に解決されるに至ってＪ’５らず、すなわらガ
スシール室２の液面が十部してメツＪ二ｈルシール５へ
達するまでの時間が飛躍的に長くなるが液面上界が皆無
になるものではなく、ポンプ取扱液７によっては顕著な
効果が生じない場合がある。(Problems to be Solved by the Invention) According to these conventional M4 structures, the baffle plate 13 or Iζ causes disturbance in the pump handling liquid 7 in the gas seal chamber 2 due to the rotation of the rotating shaft 12 due to the action of the sleeve 16. Therefore, although the problem of the upper boundary of the liquid level in the gas seal chamber 2 can be greatly improved to the extent that it does not cause practical difficulties for some liquids 7 handled by the pump, it has not been completely solved until J'5 et al. In other words, the time it takes for the liquid level in the gas seal chamber 2 to reach the gas seal 5 will be dramatically longer, but this does not mean that the upper limit of the liquid level will disappear, and the pump handling liquid will increase dramatically. 7 may not produce a noticeable effect.
その理由としては、外内周がｔｉＱ記邪ＩＪＩ板１３の
内側縁と回転軸１２の外周とが形成される環状空間２０
にある部分のポンプ取扱液７または前記スリーブ１６と
回転軸１２とで形成される軸貫通部間隙１７にある部分
のポンプ取扱′ａ７は依然として回転軸１２に連れて回
流されており、この回流によってガス６が挿めで微量ず
つではあるがポンプ取扱液７に混入され、回転軸１２に
沿ってポンプ部１へ漏出されるためと＋１１定さ机、ガ
ス６を巻き込み易い高帖磨液や発泡性液およびガス６が
溶ｃノ込み易い高石ｒｌ？度液の１易合（、未液面ト讐
が極めて速いことが確認されている。The reason is that the outer and inner periphery is an annular space 20 in which the inner edge of the tiQ memory IJI plate 13 and the outer periphery of the rotating shaft 12 are formed.
The part of the pump handling liquid 7 in the area or the part of the pump handling liquid 'a7 in the shaft penetration gap 17 formed between the sleeve 16 and the rotating shaft 12 is still being circulated along with the rotating shaft 12, and due to this circulating flow. The gas 6 is mixed into the pump handling liquid 7 in minute amounts and leaks into the pump part 1 along the rotating shaft 12. Takaishi RL where liquid and gas 6 easily penetrate into the melt? It has been confirmed that the rate of liquid level change is extremely fast.
従って、長期に渡っても、また凡ゆるポンプ取扱液７に
対しても、ガスシール室２の液面上昇を抑えてポンプ取
扱液７のキャンドモータ部３への侵入を阻止するために
は、ガスシール室２へ外部ガス源から適宜ガス６を補給
する必要がある。Therefore, in order to suppress the rise in the liquid level in the gas seal chamber 2 and prevent the pump handling liquid 7 from entering the canned motor section 3 over a long period of time and for all types of pump handling liquid 7, It is necessary to appropriately supply gas 6 to gas seal chamber 2 from an external gas source.
ところが一方、ガスシール室２の液面」−胃が抑えられ
た状態においても、ガスシール室２の回転軸１２に接す
る部分の液面から回転軸１２の回転によってポンプ取扱
ｉ７が極めて微α１ずつではあるが上方へ飛散されてこ
のポンプ取扱液７の飛沫がメカニカルシール５へ到達づ
る結果、この飛沫に含まれたスラリーなとの異物やこの
飛沫がメカニカルシール５部で重合、ゲル化して形成さ
れた異物がメカニカルシール５に噛み込むことにより、
または高粘度の飛沫の侵入によってメカニカルシール５
の潤滑が妨げられることにより、メカニカルシール５が
損１れされてポンプ故障に至ることがＭｊ啄されている
。However, on the other hand, even when the liquid level in the gas seal chamber 2 is suppressed, the liquid level in the part of the gas seal chamber 2 that is in contact with the rotating shaft 12 changes by the rotation of the rotating shaft 12 by a very small amount α1. However, as the droplets of the pump handling liquid 7 are scattered upward and reach the mechanical seal 5, foreign substances such as slurry contained in the droplets and these droplets polymerize and gel in the mechanical seal 5 part. When the foreign matter gets caught in the mechanical seal 5,
Or mechanical seal 5 due to the intrusion of high viscosity droplets.
It is believed that if the lubrication of the pump is prevented, the mechanical seal 5 will be damaged and the pump will fail.
前記ポンプ取扱液７の飛沫をメカニカルシ−ル５へ、到
）ヱさせないために、第４図に点線にて示すように、回
転軸１２にメカニカルシール５の下側に近接した回転円
板２１を取着することが木えられるが、この回転円板２
１の回転に伴ってガスシール室２にガス６の回流が生じ
るため、ポンプ取扱液７の飛沫が微細であるほど１１４
記ガス６の回流に混流され、かえってメカニカルシール
５へ到達される怖れが強くなり、さらにはガスシール室
２のポンプ取扱液７の気化ガスがメカニカルシール５部
で重合、ゲル化される場合や前記気化ガスによってメカ
ニカルシールが腐蝕される場合などポンプ取扱液７の気
化ガスの影響による場合には、これらを防ぐ手段がなか
った。In order to prevent splashes of the pump handling liquid 7 from reaching the mechanical seal 5, a rotating disk 21 is disposed on the rotating shaft 12 and close to the lower side of the mechanical seal 5, as shown by the dotted line in FIG. It is possible to attach the rotary disk 2, but this rotating disk 2
As the gas 6 circulates in the gas seal chamber 2 as the pump 1 rotates, the finer the droplets of the pump handling liquid 7, the higher the 114
There is a strong possibility that the gas will be mixed with the circulating flow of the gas 6 and reach the mechanical seal 5, and furthermore, the vaporized gas of the pump handling liquid 7 in the gas seal chamber 2 will polymerize and gel in the mechanical seal 5. In cases where the mechanical seal is corroded by the vaporized gas, there is no means to prevent this from occurring due to the effects of the vaporized gas of the pump handling liquid 7.
本発明は上記問題点に鑑みなされたもので、ポンプ運転
中またはポンプ取扱液７内在中に外部ガス源から常時ガ
ス６を供給して、このガス６をメカニカルシール５部を
経た後、回転軸１２との狭い間隙からガスシール室２へ
流入させるよう構成づることにより、ガスシール室２の
液面上昇が阻止できることは勿論、ガスシール室２の液
面から上方へ飛散されるポンプ取扱液７の飛沫およびポ
ンプ取扱液７の気化ガスがメカニカルシール５へ到達す
るのを防止できるガスシール型キャンドモータポンプを
提供するものである。The present invention has been made in view of the above-mentioned problems, and involves constantly supplying gas 6 from an external gas source while the pump is operating or inside the pump handling liquid 7, and after passing the gas 6 through the mechanical seal 5, the rotating shaft By configuring the structure so that the liquid flows into the gas seal chamber 2 through a narrow gap between the gas seal chamber 2 and the gas seal chamber 2, it is possible to prevent the liquid level in the gas seal chamber 2 from rising, and also prevent the pump handling liquid 7 from being splashed upward from the liquid level in the gas seal chamber 2. To provide a gas seal type canned motor pump that can prevent droplets of water and vaporized gas of the pump handling liquid 7 from reaching the mechanical seal 5.
（問題点を解決するための手段）
本発明のガスシール型キャンドモータポンプは、ポンプ
部の上側にガスシール室を介してキャンドモータ部を気
密に一体に構成し、このキャンドモータ部のロータ室と
前記ガスシール室とをメカニカルシールにて軸封したキ
ャンドモータポンプにおいて、前記ガスシール室と前記
メカニカルシールとの間にこのメカニカルシールを前記
ガスシール室から遮断するガス受給室を設け、このガス
受給室と前記ガスシール室とを狭い’１１１！Ｗ通部間
隙を介して連通し、ポンプ運転中またはポンプ取扱液内
在中に前記ガス受給室へガス、を供給して前記狭い軸貫
連部間隙を経て前記ガスシール室へ流入させるための外
部ガス源を前記ガス受給室に接続してなるものである。(Means for Solving the Problems) The gas seal type canned motor pump of the present invention has a canned motor section airtightly integrated with the upper side of the pump section via a gas seal chamber, and a rotor chamber of the canned motor section. In the canned motor pump in which the gas seal chamber and the gas seal chamber are sealed with a mechanical seal, a gas receiving chamber is provided between the gas seal chamber and the mechanical seal to isolate the mechanical seal from the gas seal chamber, and the gas The receiving chamber and the gas seal chamber are narrow '111! An external part communicates with the W through-part gap and supplies gas to the gas receiving chamber during pump operation or while the pump handling liquid is present, and causes the gas to flow into the gas seal chamber through the narrow shaft-through-connection gap. A gas source is connected to the gas receiving chamber.
（作用）
本発明のガスシール型キャンドモータポンプは、ポンプ
運転中また【よボン゛プ取扱液内在中に外部ガス源から
常時ガスを供給づることにより、ガスシール室にガスが
過分に補給されるのでガスシール室のガス司が減少する
ことによる液面上昇が１ｉ［Ｊ“されてポンプ取扱液が
メカニカルシールへ到達されず、Ｊ３よびガス受給室か
ら狭い軸貝通部間隙を通ってガスシール室へ流入される
ガス流によってポンプ取扱液の飛沫や気化ガスがガス受
給室へ浸入するのが阻止されてメカニカルシールへ到達
されず、従ってポンプ取扱液に起因してメカニカルシー
ルが損傷されることがない。(Function) The gas seal type canned motor pump of the present invention prevents excessive gas from being replenished into the gas seal chamber by constantly supplying gas from an external gas source while the pump is operating or while the pump is handling liquid. As a result, the liquid level rise due to the decrease in the gas capacity in the gas seal chamber is reduced to 1[J'', and the pump handling liquid does not reach the mechanical seal, and the gas flows from J3 and the gas receiving chamber through the narrow shaft shell passage gap. The gas flow flowing into the seal chamber prevents splashes and vaporized gas from the pump handling liquid from entering the gas receiving chamber and reaching the mechanical seal, thereby damaging the mechanical seal due to the pump handling liquid. Never.
（実施例） 次に、本発明の実施例を図面に基づぎ説明する。(Example) Next, embodiments of the present invention will be described based on the drawings.
第１図および第２図において、７０はポンプ部１の上側
にガスシール室２を介してキャンドＥ−タ部３が気密に
一体に構成され、このキャンドモー９部３のロータ室４
と前記ガスシール室２とがメカニカルシール５にて軸封
されたキせンドモータボンブで、前記キャンドモータ部
３の上側に突出された回転軸１２には補助インペラ１１
が取着されており、前記メカニカルシール５のロータ室
４側の圧力がガスシール室２側の圧力よりも高くなるよ
うに、前記ロータ室４および上部ボット８と熱交換器９
に封入された清澄な液１０が前記補助インペラ１１にて
加圧され、かつ上部軸受２２、ステータキャン２３とロ
ータキャン２４との間隙２５および下部軸受２６と前記
ロータ室４を通り、前記ガスシール室２を構成するアダ
プタ２７の上部に設けられて前記メカニカルシール５を
内包したシール液室２８、循環バイブ２９、熱交換器９
、循環パイプ３０および前記上部ボット８を軽で補助イ
ンペラ１１へと循環されてキャンドモータ部３の冷却と
軸受２２．２Ｇの潤滑を行なう循環経路が形成されてい
る。In FIGS. 1 and 2, a canned motor section 3 is airtightly integrated with the upper side of the pump section 1 via a gas seal chamber 2, and a rotor chamber 4 of this canned motor section 3
This is a canned motor bomb in which the gas seal chamber 2 and the gas seal chamber 2 are sealed by a mechanical seal 5, and an auxiliary impeller 11 is mounted on a rotating shaft 12 that projects above the canned motor section 3.
is attached to the rotor chamber 4, the upper bottom 8, and the heat exchanger 9 so that the pressure on the rotor chamber 4 side of the mechanical seal 5 is higher than the pressure on the gas seal chamber 2 side.
The clear liquid 10 sealed in the liquid is pressurized by the auxiliary impeller 11, passes through the upper bearing 22, the gap 25 between the stator can 23 and the rotor can 24, the lower bearing 26, and the rotor chamber 4, and passes through the gas seal chamber. 2, a sealing liquid chamber 28 containing the mechanical seal 5, a circulation vibrator 29, and a heat exchanger 9.
A circulation path is formed in which the oil is circulated through the circulation pipe 30 and the upper bot 8 to the auxiliary impeller 11 to cool the canned motor section 3 and lubricate the bearing 22.2G.
そして、前記メカ二ノＪルシール５は、回転ｌ袖１２に
取着された回転環５ａを上側に固定環５ｂを下側にして
配設され、この固定環５ｂはガスシール室２どシール液
室２８を区画するアダプタ２７の仕切壁３１に取着され
た固定環支え３２に装着固定されており、前記アダプタ
２７どポンプケーシング３３の接合部にはガスシール室
２とポンプ部１とを区画する仕切１Ｊｉｉ３４が取着さ
れ、この仕切板３４を貫通してポンプ部１へ突出された
回転軸１２の下端部に主インペラ３５が取６されている
。The mechanical seal 5 is arranged with the rotating ring 5a attached to the rotating sleeve 12 on the upper side and the fixed ring 5b on the lower side. The adapter 27 is attached and fixed to a fixed ring support 32 attached to a partition wall 31 of the adapter 27, which partitions the gas seal chamber 2 and the pump part 1 at the junction of the adapter 27 and the pump casing 33. A partition 1Jii 34 is attached, and a main impeller 35 is attached to the lower end of the rotary shaft 12 that passes through the partition plate 34 and projects into the pump section 1 .
また前記ガスシール室２には仕切板３４から上方へ突出
した′ｌＩｌ数の邪魔板１３が放射状に配設されており
、または図示しないが前記第５図に示すようなスリーブ
１６が仕切板３４から上方へ突出されて配設されてａ３
す、前記仕切板３４の下面の環状突起３６と主インペラ
３５の後面シュラウド３７の環状突起３８どにより構成
されたＡ゛リフイス３９内側環状空間がバランス室４０
として形成されており、このバランス室４０は上部では
仕切板３４の軸貫通部間隙４１を介しガスシール室２に
連通され、下部では前記後面シュラウド３７に穿削され
たバランスホール４２を介して主インペラ３５の吸込側
に連通されており、すなわち前記ガスシール室２が仕切
板３４の軸貫連部間隙４１を介してポンプ低圧部に連通
されている。Further, in the gas seal chamber 2, a number of baffle plates 13 protruding upward from the partition plate 34 are arranged radially, or, although not shown, sleeves 16 as shown in FIG. A3
The annular space inside the A-refice 39, which is formed by the annular projection 36 on the lower surface of the partition plate 34 and the annular projection 38 on the rear shroud 37 of the main impeller 35, is connected to the balance chamber 40.
The balance chamber 40 is connected to the gas seal chamber 2 at the upper part through a shaft penetration gap 41 of the partition plate 34, and is connected to the gas seal chamber 2 at the lower part through the balance hole 42 drilled in the rear shroud 37. It is communicated with the suction side of the impeller 35, that is, the gas seal chamber 2 is communicated with the pump low pressure section via the shaft-through-connection gap 41 of the partition plate 34.
４３、４４はそれぞれＡ−ヤントモータ部３および上部
ボッ１−８の冷却ジャケットで、冷却パイプ４５゜４６
を介して熱交換″＄１９へ供給される冷却水が順次流れ
るように偶成されてａ３す、４７はがスシール室２のポ
ンプ取扱液７の液面監視用覗き窓、４８はキセンドモー
タ部３を循環される清ｆｆｌな液１０の液ｍ監祝用覗き
窓である。43 and 44 are cooling jackets for the A-yant motor section 3 and upper box 1-8, respectively, and cooling pipes 45° and 46
47 is a viewing window for monitoring the liquid level of the pump handling liquid 7 in the seal chamber 2, and 48 is a viewing window for monitoring the liquid level of the pump handling liquid 7 in the seal chamber 2. This is a viewing window for monitoring the circulating clean liquid 10.
以上の構成は、本発明のｉ”ｔＪ提となる従来のガスシ
ール型キャンドモータポンプ７０の例を示したもので、
次に本発明の特徴部分の構成について説明する。The above configuration shows an example of the conventional gas seal type canned motor pump 70, which is a feature of the present invention.
Next, the configuration of the characteristic portion of the present invention will be explained.
前記固定環支え３２はその下端部が内径側に延在されて
、この固定環支え３２と回転＠１２および１１０記固定
環５ｂとで囲まれる空間が前記メカニカルシール５を前
記ガスシール室２から遮断するガス受給室４９として形
成されており、前記固定環支え３２の下端内径部には前
記ガスシール室２側へ延在するスリーブ部５０が設けら
れて、このスリーブ部５０と回転Ｑ＊１２との間の狭い
＠４通部間隙５１によって前記ガス受給室４９ど前記ガ
スシール室２とが連通されており、そして前記ガス受給
室４９は前記固定環支え３２に穿設されたガス通孔５２
、このガス通孔５２に溶接にて連通された内部ガスパイ
プ５３、前記アダプタ２７の側壁に気密に取着されて前
記内部ガスパイプ５３の他端がユニオン５４にて接続さ
れたガス受給口５５、外部ガスパイプ５６および必要に
応じて設けられる定流ｍ装置５１および弁５８を介して
外部ガス源５９に接続されており、すなわちポンプ運転
中またはポンプ取扱液７内在中に前記外部ガスＲ５９か
ら常時ガス６が供給されて、このガス６が前記ガス受給
室４９を経た後、前記狭い軸貫通部間隙５１から前記ガ
スシール室２へ流入されるように構成されている。The lower end of the fixed ring support 32 extends inwardly, and a space surrounded by the fixed ring support 32 and the rotating @12 and fixed rings 5b separates the mechanical seal 5 from the gas seal chamber 2. A sleeve portion 50 extending toward the gas seal chamber 2 side is provided at the inner diameter portion of the lower end of the fixed ring support 32. The gas receiving chamber 49 and the gas seal chamber 2 are communicated with each other through a narrow gap 51 between the gas receiving chambers 49 and 4, and the gas receiving chamber 49 is connected to a gas communicating hole formed in the fixed ring support 32. 52
, an internal gas pipe 53 connected to the gas vent 52 by welding, a gas inlet 55 airtightly attached to the side wall of the adapter 27 and connected to the other end of the internal gas pipe 53 by a union 54, and an external gas inlet 55. It is connected to an external gas source 59 via a gas pipe 56 and a constant flow m device 51 and a valve 58 provided as necessary, that is, the gas 6 is constantly supplied from the external gas R59 during pump operation or while the pump handling liquid 7 is inside. is supplied, and after passing through the gas receiving chamber 49, this gas 6 is configured to flow into the gas seal chamber 2 through the narrow shaft penetration gap 51.
次に、以上のように構成された実施例の動作について説
明する。Next, the operation of the embodiment configured as above will be explained.
ポンプ運転中に外部ガス源５９からガス受給室４つに常
時ガス６を供給することにより、狭い軸貫通部間隙５１
を介してガスシール室２にガス６が補給されるので、ガ
スシール室２のガス６が微量ずつポンプ部１側へ漏出さ
れてガスシール室２のガス６ｍが減少されるために生じ
る液面上界がｌ止されてポンプ取扱液７がメカニカルシ
ール５へ到達されないことは勿論、前記ガス６が前記狭
い軸貫連部間隙５１からガスシール室２へ流入される際
のガス流によりて、前記狭い軸貫通部間隙５１を通過し
ようとするポンプ取扱液７の飛沫やポンプ取扱液７の気
化ガスが押し戻されてガス受給室４９への侵入が阻止さ
れる結束、メカニカルシール５へ到達されず、従ってポ
ンプ取扱液７に起因してメカニカルシール５が損傷され
、ポンプ１ａ障に至る問題が解消される。By constantly supplying gas 6 from an external gas source 59 to the four gas receiving chambers during pump operation, narrow shaft penetration gap 51 can be achieved.
Since the gas 6 is replenished into the gas seal chamber 2 via the Not only does the upper limit stop and the pump handling liquid 7 does not reach the mechanical seal 5, but also the gas flow when the gas 6 flows into the gas seal chamber 2 from the narrow shaft connecting gap 51, Splashes of the pump handling liquid 7 and vaporized gas of the pump handling liquid 7 that try to pass through the narrow shaft penetration gap 51 are pushed back and do not reach the mechanical seal 5, which is a binding that prevents them from entering the gas receiving chamber 49. Therefore, the problem of the mechanical seal 5 being damaged due to the pump handling liquid 7 and resulting in failure of the pump 1a is solved.
なお、前記ガスシール室２へ流入されたガス６はポンプ
取扱液７中を回転軸１２に沿って下降され、仕切板３４
の軸貫通部間隙４１、バランス室４０およびバランスホ
ール４２を経て主インペラ３５の吸込側へと至り、ポン
プ取扱液７と共にポンプ吐出口へと吐き出されるが、前
記ガス６の供給量は、過多であるとポンプ部１にキャビ
テーションが発生されるとともに供給コストが高くつく
ので、前記キャビテーションが発生されない最人供拾〇
とボンブ取扱液７の飛沫やポンプ取扱液７の気化ガスが
ガス受給室４９へ浸入するのが阻ｄ−できる最小供給量
との間に設定ずればよく、前記最小供給ｍに近いほど好
ましい。Note that the gas 6 that has flowed into the gas seal chamber 2 is lowered through the pump handling liquid 7 along the rotating shaft 12 and passes through the partition plate 34.
It reaches the suction side of the main impeller 35 through the shaft penetration gap 41, the balance chamber 40 and the balance hole 42, and is discharged to the pump discharge port together with the pump handling liquid 7, but the amount of gas 6 supplied is too large. If this occurs, cavitation will occur in the pump section 1 and the supply cost will be high, so if the cavitation does not occur, the droplets of the bomb handling liquid 7 and the vaporized gas of the pump handling liquid 7 will flow into the gas receiving chamber 49. The value may be set between d and the minimum supply amount that can prevent infiltration, and it is preferable that the value be closer to the minimum supply amount m.
実験によると、前記実施例において回転軸１２の直径を
３５＃、固定環支え３２のスリーブ部５０と回転軸１２
どの間の狭い＠目通部間隙５１を０．８ａｍ、この軸日
通部間隙５１の軸方向長さを２６ｇ、回転数を２８５
Ｏｒ、ｐ、ｍ、どし、極めて微粒のスラリーを含むクロ
ルシランをポンプ取扱液７とした場合、窒素ガスを外部
ガス源５９どして毎分２００ＣＣｆｉｉ！度供給するこ
とにより、ガスシール室２の液面上昇が阻止されること
は勿論、ポンプ取扱液７の飛沫に含まれおよび極めて微
粒であるためポンプ取扱液７の気化ガス中に混在された
前記スラリーのガス受給室４つへの侵入が阻止されて、
ポンプ取扱液７に起囚するメカニカルシール５の損傷が
防止される好結果が１１られた。According to experiments, in the above embodiment, the diameter of the rotating shaft 12 is 35#, and the sleeve portion 50 of the fixed ring support 32 and the rotating shaft 12 are
The narrow gap 51 between the shafts is 0.8 am, the axial length of the gap 51 is 26 g, and the number of rotations is 285.
When the pump handling liquid 7 is chlorosilane containing extremely fine slurry, nitrogen gas is supplied from the external gas source 59 at a rate of 200 CCfii per minute! Not only does this prevent the liquid level from rising in the gas seal chamber 2, but also prevents the liquid from being contained in the droplets of the pump handling liquid 7 and being mixed in the vaporized gas of the pump handling liquid 7 since it is extremely fine. Slurry was prevented from entering the four gas receiving chambers,
Good results were obtained in that damage to the mechanical seal 5 caused by the pump handling liquid 7 was prevented.
また、前記ガス６は、ポンプ取扱液７の気化ガスによる
メカニカルシール５への影響が無い場合にはポンプ起動
直前からポンプ停止直後の間、すなわちポンプ運転中に
のみ常時供給すればよいが、前記気化ガスによるメカニ
カルシール５への影響がある場合にはポンプ停止中にお
いてム、すなわちポンプ取扱液７内在中は常時供給し続
ける必要がある。Furthermore, if the mechanical seal 5 is not affected by the vaporized gas of the liquid 7 handled by the pump, the gas 6 may be constantly supplied only from immediately before the pump is started to immediately after the pump is stopped, that is, during pump operation. If the mechanical seal 5 is affected by the vaporized gas, it is necessary to continue supplying the gas while the pump is stopped, that is, while the pump handling liquid 7 is inside.
前記実施例においては、メカニカルシール５の固定環５
ｂが装着される固定環支え３２によってガス受給室４９
およびこのガス受給室４９とガスシール室２を連通ずる
狭い軸貫通部間隙５１を形成したが、第３図に示すよう
にアダプタ２７の仕切壁３１に固定環支え３２の下方を
覆う仕切板６０を取着し、この仕切体６０と前記固定環
支え３２、仕切壁３１および回転軸１２とで囲まれる空
間をガス受給室４９として形成しても良く、前記狭い軸
貫油部間隙５１も第３図に示すように軸方向に短くとも
支障はないが、前記第１図および第２図に示すように軸
方向にある程度長い方がより確実な効果が期待できる。In the embodiment, the fixed ring 5 of the mechanical seal 5
The gas receiving chamber 49 is secured by the fixed ring support 32 to which b is attached.
A narrow shaft penetration gap 51 was formed to communicate the gas receiving chamber 49 and the gas seal chamber 2. As shown in FIG. The space surrounded by the partition body 60, the fixed ring support 32, the partition wall 31, and the rotating shaft 12 may be formed as the gas receiving chamber 49, and the narrow through-shaft oil gap 51 may also be Although there is no problem even if the length is short in the axial direction as shown in FIG. 3, a more reliable effect can be expected if the length is longer in the axial direction to some extent as shown in FIGS. 1 and 2.
また、外部ガス源５９とガス受給室４９間の接続につい
ても、＠２内部ガスバイブ５３に代えて第３図に示すよ
うにアダプタ２７の仕切壁３１にガス通孔０１を穿設す
るなど、以上の各実施例に限らず本発明の要旨の範囲で
種々の段：１変向を成し得ることは勿論である。Furthermore, regarding the connection between the external gas source 59 and the gas receiving chamber 49, the gas passage hole 01 is provided in the partition wall 31 of the adapter 27 as shown in FIG. 3 instead of the @2 internal gas vibrator 53. It goes without saying that the present invention is not limited to the embodiments described above, and that various stage:1 changes can be made within the scope of the gist of the present invention.
本発明のガスシール型キャンドモータポンプによれば、
ポンプ運転中またはポンプ取扱液７内在中に外部ガス源
５９から常時ガス６を供給し、前記ガス６をガス受給室
４９を経た後、狭い軸貫通部間隙５１を介してガスシー
ル室２へ流入さゼることにより、ガスシール室２にガス
６が過分に補給されるので、ガスシール室２のガス６ｍ
が減少することによる液面上昇が阻止されてポンプ取扱
液７がメカニカルシール５へ到達されないことは勿論、
ガス受給室４９から狭い軸ｄ通部閤隙５１を通ってガス
シール室２へ流入されるガス流によってポンプ取扱液７
の飛沫や気化ガスがガス受給室４９へ侵入するのが阻止
されてメカニカルシール５へ到達されず、従ってポンプ
取扱液７に起囚してメカニカルシール５が損（口されて
ポンプ故陣に至る問題が解消され、保守コストが大幅に
減少されるとともに、ポンプ取扱液７の漏洩による危険
防止および環境保全上その採用が好ましい完全無漏洩構
造のキャンドモータポンプの適用範囲がさらに拡大され
るものである。According to the gas seal type canned motor pump of the present invention,
Gas 6 is constantly supplied from an external gas source 59 during pump operation or while the pump handling liquid 7 is inside, and after passing through the gas receiving chamber 49, the gas 6 flows into the gas seal chamber 2 through the narrow shaft penetration gap 51. As the gas 6 is excessively replenished into the gas seal chamber 2, the gas 6 m in the gas seal chamber 2 is
Of course, the rise in the liquid level due to the decrease in the amount of water is prevented, and the pump handling liquid 7 is prevented from reaching the mechanical seal 5.
The pump handling liquid 7 is caused by the gas flow flowing from the gas receiving chamber 49 into the gas seal chamber 2 through the narrow shaft d passage gap 51.
The droplets and vaporized gas are prevented from entering the gas receiving chamber 49 and do not reach the mechanical seal 5. Therefore, they are trapped in the pump handling liquid 7 and the mechanical seal 5 is damaged. This eliminates the problem, significantly reduces maintenance costs, and further expands the scope of application of canned motor pumps with a completely leak-free structure, which is preferable from the standpoint of preventing dangers due to leakage of the pump handling fluid 7 and protecting the environment. be.
第１図は本発明の一実施例を示すガスシール型キャンド
モータポンプの縦断正面図、第２図は同上一部の拡大！
断正面図、第３図は本発明の他の実施例を示すガスシー
ル型キャンドモータポンプの一部の縦断正面図、第４図
は従来のガスシール型キせンドモータボンブの縦断正面
図、第５図は他の従来のガスシール型キャンドモータポ
ンプの縦断正面図である。
１・・ポンプ部、２・・ガスシール室、３・・キャンド
モータ部、４・・ロータ室、５・・メカニカルシール、
４つ・・ガス受給室、５１・軸貫油部間隙、５９・・外
部ガス源。Fig. 1 is a longitudinal sectional front view of a gas seal type canned motor pump showing an embodiment of the present invention, and Fig. 2 is an enlarged view of a portion of the same!
3 is a longitudinal sectional front view of a part of a gas seal type canned motor pump showing another embodiment of the present invention; FIG. 4 is a longitudinal sectional front view of a conventional gas seal type canned motor pump; FIG. 5 is a longitudinal sectional front view of another conventional gas seal type canned motor pump. 1. Pump section, 2. Gas seal chamber, 3. Canned motor section, 4. Rotor chamber, 5. Mechanical seal,
4... Gas receiving chamber, 51. Shaft oil gap, 59. External gas source.
Claims (1)
モータ部を気密に一体に構成し、このキャンドモータ部
のロータ室と前記ガスシール室とをメカニカルシールに
て軸封したキャンドモータポンプにおいて、 前記ガスシール室と前記メカニカルシールとの間にこの
メカニカルシールを前記ガスシール室から遮断するガス
受給室を設け、このガス受給室と前記ガスシール室とを
狭い軸貫通部間隙を介して連通し、ポンプ運転中または
ポンプ取扱液内在中に前記ガス受給室へガスを供給して
前記狭い軸貫通部間隙を経て前記ガスシール室へ流入さ
せるための外部ガス源を前記ガス受給室に接続したこと
を特徴とするガスシール型キャンドモータポンプ。(1) In a canned motor pump in which a canned motor section is airtightly integrated with the upper side of the pump section via a gas seal chamber, and the rotor chamber of the canned motor section and the gas seal chamber are sealed with a mechanical seal. , A gas receiving chamber is provided between the gas seal chamber and the mechanical seal to isolate the mechanical seal from the gas seal chamber, and the gas receiving chamber and the gas seal chamber are communicated through a narrow shaft penetration gap. and an external gas source is connected to the gas receiving chamber for supplying gas to the gas receiving chamber during pump operation or while the pump handles liquid is present and flowing into the gas seal chamber through the narrow shaft penetration gap. A gas seal type canned motor pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61025567A JPH0694877B2 (en) | 1986-02-07 | 1986-02-07 | Gas seal type canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61025567A JPH0694877B2 (en) | 1986-02-07 | 1986-02-07 | Gas seal type canned motor pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62182496A true JPS62182496A (en) | 1987-08-10 |
| JPH0694877B2 JPH0694877B2 (en) | 1994-11-24 |
Family
ID=12169504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61025567A Expired - Fee Related JPH0694877B2 (en) | 1986-02-07 | 1986-02-07 | Gas seal type canned motor pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0694877B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH035999U (en) * | 1989-06-01 | 1991-01-21 | ||
| JPH0465985U (en) * | 1990-10-09 | 1992-06-09 | ||
| JP2001114705A (en) * | 1999-10-12 | 2001-04-24 | Nippon Shokubai Co Ltd | Method for easily transporting polymerizable compound |
| JP2007231874A (en) * | 2006-03-02 | 2007-09-13 | Teikoku Electric Mfg Co Ltd | Gas sealed type canned motor pump |
| JP2014145333A (en) * | 2013-01-30 | 2014-08-14 | Kawamoto Pump Mfg Co Ltd | Shaft seal structure and pump device |
| CN108457894A (en) * | 2017-06-02 | 2018-08-28 | 沈阳耐蚀合金泵股份有限公司 | Efficient non-leakage canned motor pump |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54206A (en) * | 1977-06-02 | 1979-01-05 | Kubota Ltd | Shaft sealing device for underwater power unit |
| JPS5730461U (en) * | 1980-07-30 | 1982-02-17 |
-
1986
- 1986-02-07 JP JP61025567A patent/JPH0694877B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54206A (en) * | 1977-06-02 | 1979-01-05 | Kubota Ltd | Shaft sealing device for underwater power unit |
| JPS5730461U (en) * | 1980-07-30 | 1982-02-17 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH035999U (en) * | 1989-06-01 | 1991-01-21 | ||
| JPH0465985U (en) * | 1990-10-09 | 1992-06-09 | ||
| JP2001114705A (en) * | 1999-10-12 | 2001-04-24 | Nippon Shokubai Co Ltd | Method for easily transporting polymerizable compound |
| JP2007231874A (en) * | 2006-03-02 | 2007-09-13 | Teikoku Electric Mfg Co Ltd | Gas sealed type canned motor pump |
| JP2014145333A (en) * | 2013-01-30 | 2014-08-14 | Kawamoto Pump Mfg Co Ltd | Shaft seal structure and pump device |
| CN108457894A (en) * | 2017-06-02 | 2018-08-28 | 沈阳耐蚀合金泵股份有限公司 | Efficient non-leakage canned motor pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0694877B2 (en) | 1994-11-24 |
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| R250 | Receipt of annual fees |
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