JP3189683B2 - Vertical shaft submersible pump device for liquefied gas tank - Google Patents
Vertical shaft submersible pump device for liquefied gas tankInfo
- Publication number
- JP3189683B2 JP3189683B2 JP13986496A JP13986496A JP3189683B2 JP 3189683 B2 JP3189683 B2 JP 3189683B2 JP 13986496 A JP13986496 A JP 13986496A JP 13986496 A JP13986496 A JP 13986496A JP 3189683 B2 JP3189683 B2 JP 3189683B2
- Authority
- JP
- Japan
- Prior art keywords
- ball bearing
- liquefied gas
- deep groove
- gas tank
- double
- 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.)
- Expired - Fee Related
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は液化ガスタンク用立
軸形潜没ポンプ装置に関する。The present invention relates to a vertical shaft submersible pump device for a liquefied gas tank.
【０００２】[0002]
【従来の技術】特開平１−３０１９９０号公報に記載さ
れている従来の液化ガスタンク用潜没ポンプ装置を図６
に示す。液化ガスタンク１内に、垂直に揚液管２を垂下
形成する。揚液管２の内部には、潜没ポンプ５を外部か
ら挿入、設置する。これには、ヘッドプレート８からワ
イヤ４によって潜没ポンプ５を垂直に吊り下げ（高さ数
１０ｍ)、ワイヤ４を下げて、揚液管２の下部の座面６
に潜没ポンプ５を着座させる。潜没ポンプ５は、昇圧を
行う羽根車（インペラ）部５Ｂと、ポンプの軸につなが
りこの軸を回転する回転駆動部（モータ）５Ａとから成
る。座面６は、吸込み口３に通じており、潜没ポンプ５
は吸込み弁３Ａからの液化ガス潜没ポンプ５で昇圧し、
羽根車部５Ｂの吐出側に設けられた、複数の吐出穴５Ｐ
から吐出させる。この吐出液化ガスは、吐出穴５Ｐを出
て溶液管２内を上方に流れ、吐出管７から吐出される。2. Description of the Related Art A conventional immersion pump device for a liquefied gas tank described in Japanese Patent Application Laid-Open No. 1-301990 is shown in FIG.
Shown in In the liquefied gas tank 1, a pumping pipe 2 is vertically formed vertically. A submersible pump 5 is inserted and installed inside the liquid pumping tube 2 from the outside. To this end, the immersion pump 5 is suspended vertically from the head plate 8 by the wire 4 (height: 10 m), the wire 4 is lowered, and the lower seating surface 6
The immersion pump 5 is seated. The submerged pump 5 includes an impeller (impeller) section 5B for increasing the pressure, and a rotary drive section (motor) 5A connected to the axis of the pump and rotating the axis. The seating surface 6 communicates with the suction port 3 and the submersible pump 5
Is pressurized by the liquefied gas immersion pump 5 from the suction valve 3A,
A plurality of discharge holes 5P provided on the discharge side of the impeller 5B
From the nozzle. The discharged liquefied gas flows upward through the solution pipe 2 through the discharge hole 5P, and is discharged from the discharge pipe 7.
【０００３】潜没ポンプ５を起動した場合、吐出液で揚
液管２内が満たされるまでの数分間は、潜没ポンプ５
は、所定の吐出圧力よりかなり低い吐出圧力で、大流量
運転する。When the submersible pump 5 is started, the submersible pump 5 is kept for several minutes until the liquid is filled in the liquid pumping tube 2.
Operates at a large flow rate at a discharge pressure considerably lower than a predetermined discharge pressure.
【０００４】一般的な液化ガスタンク用潜没ポンプを図
８に示す以外の例としては、特公昭６１−５５５８号公
報記載のものがある。かかる潜没ポンプでは、回転駆動
部５Ｂの配置位置と羽根車５Ａの配置位置との間付近
に、回転軸を支持する玉軸受（例えば単列深溝型の玉軸
受）及び静圧軸受を設け、更に、ポンプ運転時、玉軸受
に負荷されるスラスト荷重を零にする、バランスディス
ク等からなる軸スラスト平衡装置を設けている。従っ
て、玉軸受には、ポンプ通常運転中は、ラジアル荷重の
み作用されるが、このラジアル荷重は静圧軸受で受ける
ため、実質、玉軸受は補助的な役割をする。しかし、軸
スラスト平衡装置は、ポンプが所定の吐出圧力を発生し
た状態で機能するため、玉軸受には、吐出液が揚液管内
を満たすまでの数分間、ポンプロータの重量やインペラ
の下向き推力と言った大きなスラスト荷重が負荷され
る。Another example of a general immersion pump for a liquefied gas tank other than that shown in FIG. 8 is that described in Japanese Patent Publication No. 61-5558. In such a submerged pump, a ball bearing (for example, a single-row deep-groove type ball bearing) and a hydrostatic bearing that support the rotating shaft are provided near the position between the position of the rotary drive unit 5B and the position of the impeller 5A. Further, there is provided an axial thrust balance device including a balance disk or the like for reducing the thrust load applied to the ball bearing to zero during operation of the pump. Therefore, during the normal operation of the pump, only the radial load is applied to the ball bearing. However, since the radial load is received by the hydrostatic bearing, the ball bearing substantially plays an auxiliary role. However, since the axial thrust balancer functions when the pump generates a predetermined discharge pressure, the ball bearing has a pump rotor weight and a downward thrust of the impeller for several minutes until the discharge liquid fills the pumping pipe. A large thrust load is applied.
【０００５】更に詳しく図７を用いて説明する。図７に
は、液化ガスタンク用潜没ポンプ５の起動直後のシステ
ムヘッドカーブを示す。この左側のカーブは、横軸が吐
出流量、縦軸が吐出出力を示し、が起動時、以後、
、、と変化してゆく様子を示している。約３分後
にの状態となって吐出管７から昇圧液化ガスが吐出す
る。右側のポンプ装置は、揚液管２と、ポンプ５と、ヘ
ッドプレート８と、吐出管７より成る例を示している。A more detailed description will be given with reference to FIG. FIG. 7 shows a system head curve immediately after the liquefied gas tank submersible pump 5 is started. In the curve on the left side, the horizontal axis indicates the discharge flow rate, and the vertical axis indicates the discharge output.
,, And are changing. After about 3 minutes, the pressurized liquefied gas is discharged from the discharge pipe 7. The pump device on the right side shows an example composed of the liquid pumping tube 2, the pump 5, the head plate 8, and the discharge tube 7.
【０００６】まず、ポンプ５を起動すると、吐出液で揚
液管２内を満了するまでの数分間は液を押し上げるだけ
のわずかな吐出圧力で充分であり、ポンプ５は定格吐出
圧力よりかなり低い吐出圧力で運転され大液量運転とな
る。揚液管２内の液面が徐々に上がると同時に、ポンプ
のシステムヘッドカーブも変化してゆく、液が揚液管２
を満たし上部吐出管２０によって絞られ初めて定格の吐
出圧力となる。First, when the pump 5 is started, a slight discharge pressure sufficient to push up the liquid is sufficient for a few minutes until the liquid is filled in the liquid pumping pipe 2, and the pump 5 is considerably lower than the rated discharge pressure. The operation is performed at the discharge pressure, and the operation becomes a large liquid amount operation. The liquid level in the pumping pipe 2 gradually rises, and at the same time, the system head curve of the pump also changes.
Satisfies the conditions described above, and becomes the rated discharge pressure only after being throttled by the upper discharge pipe 20.
【０００７】特にポンプが大型化し、揚液管２が大口径
となった場合、定格吐出圧力になるまで更に時間が延長
され、軸スラスト平衡装置が作動せず、玉軸受に多大な
スラスト荷重が負荷されることになる。In particular, when the size of the pump becomes large and the pumping pipe 2 has a large diameter, the time is further extended until the rated discharge pressure is reached, the axial thrust balance device does not operate, and a large thrust load is applied to the ball bearing. Will be loaded.
【０００８】ポンプが小型で揚液管が小口径の時は、満
液時間が短く、比較的早い時間にスラスト平衡装置が働
くが、ポンプの大容量化等によって、揚液管の大口径化
がなされた場合、ポンプを起動してから、液が揚液管を
満たすまでに要する時間が更に延長し、それに伴いスラ
スト荷重が玉軸受に加わる時間も長くなり、軸受寿命を
著しく短縮してしまうため、ポンプの長期安定運転を望
むことができなかった。 このような問題に対して特開
平７−１０２２８５号公報に記載のものがあるが、この
発明は単列深溝玉軸受を複列配置し、スラスト荷重を複
数の単列深溝型軸受に分配し、１個当りの深溝玉軸受に
荷重を減少させ、軸受の長寿命化を図ろうとするもので
ある。[0008] When the pump is small and the pumping pipe has a small diameter, the filling time is short and the thrust equilibrium device operates at a relatively early time. In this case, the time required from the start of the pump to the time when the liquid fills the liquid pump pipe is further extended, and accordingly, the time when the thrust load is applied to the ball bearing is increased, and the bearing life is significantly shortened. Therefore, long-term stable operation of the pump could not be expected. Such a problem is described in Japanese Patent Application Laid-Open No. 7-102285. However, in the present invention, single row deep groove ball bearings are arranged in multiple rows, and the thrust load is distributed to a plurality of single row deep groove type bearings. The purpose is to reduce the load on each deep groove ball bearing and extend the life of the bearing.
【０００９】[0009]
【発明が解決しようとする課題】複列配置した単列深溝
型玉軸受はポンプ回転軸に固定されるが、それ以外に複
列配置のズレを防止し、均等にスラスト荷重が負荷させ
るような固定具は無かった。そもそも、玉軸受はボ−ル
とレ−ス（内外輪）にわずかな隙間があるのが一般的
で、例えば内輪レ−スをシャフトに固定した場合、外輪
レ−スは軸及び周方向にガタがありズレが生じる。又、
ボ−ルが摩耗したりするとよりガタが大きくなる。A single row deep groove type ball bearing arranged in a double row is fixed to a pump rotating shaft. In addition, the double row ball bearing is prevented from being displaced and a thrust load is uniformly applied. There were no fixtures. In the first place, ball bearings generally have a slight gap between the ball and the race (inner and outer races). For example, when the inner race race is fixed to the shaft, the outer race race moves in the axial and circumferential directions. There is backlash and deviation occurs. or,
If the ball is worn, the backlash will increase.
【００１０】複列に配置した深溝型玉軸受は、例えば２
列に配置した場合、深溝型玉軸受のボ−ルとレースの接
触角が、上側の深溝型玉軸受と下側の深溝型玉軸受、共
に等しい時にスラスト荷重均等分配の効果を発揮する。
軸スラスト平衡装置が作動した時やシャフトの挙動によ
り、複列配置した深溝型玉軸受を含む回転系が軸方向に
動作し玉軸受が上記のようにガタがある場合、例え、内
輪側レ−スが上下の深溝型玉軸受が平行に軸に固定され
たとしても、リングスペ−サからの離脱を防ぎ、外輪側
を平行に固定するものが無いために、上下の深溝型玉軸
受の外輪がそれぞれ独立してガタを生じさせやすくな
る。その際、上下の深溝型玉軸受の外輪とリングスペ−
サの間に隙間があき、液化ガス中の異物等が入り込み、
その状態でスラスト荷重が負荷された場合、ボ−ルとレ
−スの接触角が、上側の深溝型玉軸受と下側の深溝型玉
軸受共に等しくならない可能性があり、荷重の均等分配
を損なうことが生じる。[0010] Deep groove ball bearings arranged in double rows are, for example, 2 ball bearings.
When arranged in rows, when the contact angle between the ball and the race of the deep groove ball bearing is equal in both the upper deep groove ball bearing and the lower deep groove ball bearing, the effect of uniform distribution of thrust load is exhibited.
When the rotating system including the double-row deep groove ball bearings operates in the axial direction due to the operation of the shaft thrust balance device or the behavior of the shaft, and the ball bearings are loose as described above, for example, when the inner ring side Even if the upper and lower deep groove type ball bearings are fixed to the shaft in parallel, the outer ring of the upper and lower deep groove type ball bearings cannot be separated from the ring spacer and there is nothing to fix the outer ring side in parallel. It is easy to cause backlash independently of each other. At that time, the outer ring and ring space of the upper and lower deep groove ball bearings
There is a gap between the gas and foreign matter in the liquefied gas
If a thrust load is applied in that state, the contact angle between the ball and the race may not be equal for both the upper deep groove ball bearing and the lower deep groove ball bearing. Damage occurs.
【００１１】又、静圧軸受と軸スラスト平行装置によ
り、玉軸受のボ−ルとレ−スの摩耗が極端に多くなるこ
とはないが、摩耗が大きくなり、外輪レ−スのガタが大
きくなった場合、リングスペ−サが外輪レ−スから離脱
する等を防止する必要がある。[0011] Further, although the wear of the ball and the race of the ball bearing is not extremely increased by the static pressure bearing and the shaft thrust parallel device, the wear is increased and the play of the outer race race is increased. In such a case, it is necessary to prevent the ring spacer from coming off the outer race race.
【００１２】更に、複列に配置した深溝型玉軸受の外輪
を、ベアリングハウジング側固定し、回転軸を軸方向に
移動可能にした場合も又、上記のような玉軸受の摩耗が
大きくなった時などに、内輪レ−スのガタが大きくなっ
た場合、リングスペ−サが内輪レ−スから離脱する等を
防止する必要がある。Further, when the outer races of the deep groove type ball bearings arranged in a double row are fixed to the bearing housing and the rotating shaft is movable in the axial direction, the wear of the ball bearings as described above is increased. If the backlash of the inner race becomes large, for example, at times, it is necessary to prevent the ring spacer from coming off the inner race.
【００１３】従来の液化ガスタンク用潜没ポンプ装置に
おける複列配置した単列深みぞ型の玉軸受において、上
下の深溝型玉軸受へのスラスト荷重の分配を確固たるも
のとし、スラスト荷重の均等分配性を確保し、複列配置
した深溝型玉軸受の信頼性を向上させる必要がある。In a conventional single-row deep-groove type ball bearing in a conventional submerged pump apparatus for a liquefied gas tank, the distribution of thrust load to upper and lower deep groove type ball bearings is ensured, and uniform distribution of thrust load is achieved. It is necessary to improve the reliability of the deep groove type ball bearings arranged in double rows.
【００１４】本発明の目的は、ポンプの大容量化、揚液
管の大口径化のもとで、複列配置した深溝型玉軸受の機
能と信頼性を向上させ、軸受の長寿命化を可能にする液
化ガスタンク用立軸潜没ポンプ装置を提供することにあ
る。An object of the present invention is to improve the function and reliability of a double-row deep-groove ball bearing and increase the life of the bearing under the circumstances that the capacity of the pump is increased and the diameter of the pumping pipe is increased. It is an object of the present invention to provide a vertical shaft submersible pump device for a liquefied gas tank.
【００１５】[0015]
【課題を解決するための手段】上記目的は、液化ガスタ
ンク内に垂下された揚液管内に挿入され、液化ガスタン
クからの液化ガスを吸込み、吐出する液化ガスタンク用
潜没ポンプ装置において、ポンプ軸と該ポンプ軸を回転
駆動する駆動部と、ポンプ軸に沿って駆動部よりも下方
の位置に設けられ、液化ガスタンクから吸込んだ液化ガ
スを昇圧する羽根車と、羽根車で昇圧した液化ガスを吐
出する吐出穴と、ポンプ軸を支持する複数の軸受と、ポ
ンプ軸に取付けられて軸推力を平衡させるバランスディ
スクと、バランスディスク近傍に設けられた中軸受に複
列配置した深溝型玉軸受から構成されると共に、複列配
置した深溝型玉軸受の外輪又は内輪を固定するリテーナ
を設ける、ことによって達成される。SUMMARY OF THE INVENTION The object of the present invention is to provide a submerged pump for a liquefied gas tank which is inserted into a pumping pipe suspended in a liquefied gas tank, sucks and discharges the liquefied gas from the liquefied gas tank. A drive unit for rotating and driving the pump shaft, an impeller provided at a position below the drive unit along the pump shaft to pressurize the liquefied gas sucked from the liquefied gas tank, and discharge the liquefied gas pressurized by the impeller. Discharge shaft, a plurality of bearings supporting the pump shaft, a balance disk attached to the pump shaft to balance the axial thrust, and a deep groove ball bearing arranged in a double row in a middle bearing provided near the balance disk. This is achieved by providing a retainer for fixing the outer ring or the inner ring of the deep groove type ball bearing arranged in a double row.
【００１６】[0016]
【発明の実施の形態】図１は、液化ガスタンク用立軸形
潜没ポンプ装置の縦断面図である。図中、図８と同一符
号のものは、従来技術と同等部分である。FIG. 1 is a longitudinal sectional view of a vertical shaft submerged pump device for a liquefied gas tank. In the figure, those having the same reference numerals as those in FIG. 8 are the same as those in the prior art.
【００１７】本実施例の液化ガスタンク用潜没ポンプ装
置は、液化ガスタンク内に垂下された揚液管２と、揚液
管２の底部に座面６に着座させて設置されたポンプ５、
ケーシング１８から成る。The submerged pump device for a liquefied gas tank according to the present embodiment includes a pumping pipe 2 suspended in a liquefied gas tank, a pump 5 mounted on a seat surface 6 at the bottom of the pumping pipe 2,
It consists of a casing 18.
【００１８】揚液管２の底部６は吸込口３につながって
おり、吸込口３から吸込弁３Ａを介して液化ガスが底部
６を介してポンプ５に入る。The bottom 6 of the pumping pipe 2 is connected to the suction port 3, and the liquefied gas enters the pump 5 from the suction port 3 via the suction valve 3 A via the bottom 6.
【００１９】ポンプ５は、上方位置に設けた回転駆動部
５Ａと、下方位置に設けた羽根車部５Ｂと、回転軸（シ
ャフト）１２とから成る。回転駆動部５Ａは、軸１２に
結合した回転子（ロータ）部９と、この回転子部９に対
向する静止（ステータ）部１０とから成り、静止部１０
と回転子部９とでモータを形成し、回転子部９を回転さ
せることで軸１２を回転する。The pump 5 includes a rotary drive unit 5A provided at an upper position, an impeller unit 5B provided at a lower position, and a rotary shaft (shaft) 12. The rotation drive unit 5A includes a rotor (rotor) unit 9 coupled to the shaft 12 and a stationary (stator) unit 10 facing the rotor unit 9.
A motor is formed with the rotor unit 9 and the shaft 12 is rotated by rotating the rotor unit 9.
【００２０】羽根車（インペラ）部５Ｂは、液化ガス吸
込み側から軸１２の上方にかけて、軸１２に取り付けた
複数のインペラ１３、及び固定側に取り付けたステージ
１１、から成る。更に、羽根車部５Ｂの上方には、複数
の吐出穴５Ｐを設け、吐出通路５Ｑに昇圧液化ガスを送
る。The impeller (impeller) section 5B includes a plurality of impellers 13 attached to the shaft 12 and a stage 11 attached to the fixed side from the liquefied gas suction side to above the shaft 12. Further, a plurality of discharge holes 5P are provided above the impeller portion 5B, and the pressurized liquefied gas is sent to the discharge passage 5Q.
【００２１】軸１２の回転駆動部５Ａよりも上方のヘッ
ドカバ−２２への取り付け個所近傍には上軸受１６を設
け、軸１２の羽根車部５Ｂの底部６の近傍には下軸受１
４を設け、更に、羽根車部５Ｂと回転駆動部５Ａとの中
継部近傍に中軸受１５を設け、それぞれが軸１２を支持
する。この他に、上軸受１６の上方には静圧軸受１９Ａ
を設ける。中軸受１５の周囲及び下方には、軸スラスト
平衡装置１７を設ける。軸スラスト平衡装置１７は、中
軸受１５の外周面に設けた円筒形の軸スリーブ１７Ａ、
静圧軸受１９Ｂ、バランスディスク１７Ｂ等から成る。
ポンプ起動時においては、中軸受１５が軸１２を支持
し、一方、ポンプ通常運転状態に入ると、バランスディ
スク１７Ｂの軸方向への遊動により、ベアリングハウジ
ング１５Ａかより中軸受１５による支持が離脱し、中軸
受１５に作用するスラスト荷重は除去される。An upper bearing 16 is provided near a position where the shaft 12 is attached to the head cover 22 above the rotary drive portion 5A, and a lower bearing 1 is provided near the bottom portion 6 of the impeller portion 5B of the shaft 12.
4, and further, a middle bearing 15 is provided near a relay portion between the impeller portion 5 </ b> B and the rotation drive portion 5 </ b> A, and each supports the shaft 12. In addition, a hydrostatic bearing 19A is provided above the upper bearing 16.
Is provided. An axial thrust balance device 17 is provided around and below the middle bearing 15. The shaft thrust balance device 17 includes a cylindrical shaft sleeve 17A provided on the outer peripheral surface of the middle bearing 15,
It comprises a hydrostatic bearing 19B, a balance disk 17B and the like.
When the pump is started, the center bearing 15 supports the shaft 12. On the other hand, when the pump enters a normal operation state, the support by the center bearing 15 is released from the bearing housing 15A from the bearing housing 15A due to axial movement of the balance disk 17B. The thrust load acting on the middle bearing 15 is removed.
【００２２】上軸受１６は、単列深みぞ型玉軸受を使用
し、中軸受１５は外輪側にリテ−ナを取付けた複列配置
の深みぞ型玉軸受を使用する。下軸受１４は静圧すべり
軸受を使用する。この静圧すべり軸受を使用するのは、
軸受端部の支持するためである。The upper bearing 16 uses a single-row deep groove ball bearing, and the middle bearing 15 uses a double-row deep groove ball bearing with a retainer attached to the outer ring side. The lower bearing 14 uses a hydrostatic sliding bearing. The use of this hydrostatic plain bearing is
This is for supporting the bearing end.
【００２３】中軸受１５に使用したリテ−ナを取付けた
複列配置の深みぞ型玉軸受とは、例えば図１からもわか
るように上下の２列配置の玉軸受であり、本実施例の重
要な特徴をなす。The double-row deep groove type ball bearing having the retainer attached to the middle bearing 15 is, for example, as shown in FIG. An important feature.
【００２４】静圧軸受１９Ａ、１９Ｂは、軸受１６、１
５の周辺部に設けられ、ポンプの高圧吐出液を導いて静
圧軸受を形成している。The static pressure bearings 19A and 19B are
5, and guides the high-pressure discharge liquid of the pump to form a hydrostatic bearing.
【００２５】図２に、本発明に係る液化ガスタンク用潜
没ポンプ装置の複数配列の深みぞ型玉軸受の実施例の断
面図を示す。FIG. 2 is a sectional view of an embodiment of a deep groove type ball bearing having a plurality of arrangements of a submerged pump device for a liquefied gas tank according to the present invention.
【００２６】リテ−ナ２０の内側は、複列配置の深溝型
玉軸受の外輪外周と適度な嵌めあい公差と同軸度で加工
される。ベアリングハウジング１７Ａ軸方向接触側は、
玉軸受のリベットが当らない程度の座面を設ける。リテ
−ナ２０上部には、軸方向のズレを防止するため、突起
部を設け、玉軸受の挿入の際には焼きばめの原理で挿入
し固定する。The inside of the retainer 20 is machined with an appropriate fitting tolerance and coaxiality with the outer periphery of the outer race of the deep groove type ball bearing in a double row arrangement. The bearing housing 17A axial contact side is
Provide a seating surface that does not allow the rivets of the ball bearing to hit. A projection is provided on the upper part of the retainer 20 to prevent displacement in the axial direction, and when the ball bearing is inserted, it is inserted and fixed by the shrink fit principle.
【００２７】図３に、本発明に係る液化ガスタンク用潜
没ポンプ装置の複数配列の深みぞ型玉軸受の他の実施例
の断面図を示す。FIG. 3 is a cross-sectional view of another embodiment of the deep groove type ball bearing having a plurality of arrangements of the immersion pump device for a liquefied gas tank according to the present invention.
【００２８】図２に示す実施例のリテ−ナ２０の上部突
起部を無くし、リングプレ−ト２１を用い、ねじ締結体
であるボルトでリテ−ナ本体と固定することにより、複
列配置した深溝型玉軸受の外輪側を固定する。複列配置
した深溝型玉軸受の高さに合い、固定に必要な適度な寸
法にリテ−ナ本体の内周部軸方向高さが加工されること
は言うまでもない。The upper projection of the retainer 20 of the embodiment shown in FIG. 2 is eliminated, and the retainer is fixed to the retainer main body with a ring plate 21 and a bolt which is a screw fastening body. Fix the outer ring side of the deep groove ball bearing. It goes without saying that the axial height of the inner circumferential portion of the retainer main body is machined to an appropriate dimension required for fixing according to the height of the deep groove type ball bearings arranged in double rows.
【００２９】上述する実施例によれば、複列配置の深溝
型玉軸受の外輪側にリテ−ナを設置することにより、上
下二列の深溝型玉軸受外輪レ−スがそれぞれ独立してガ
タを生じさせることを防止し、上下二列の深溝型玉軸受
外輪レ−スとボ−ルの接触角が等しくなるように、平行
性を保つことを可能にする。これにより、上下の深溝型
玉軸受にスラスト荷重の分配を確固たるものとし、均等
にスラスト荷重が分配されるよう確保できる。又、万一
玉軸受のボ−ル等の摩耗によりガタが大きくなり、外輪
側のリングスペ−サが思わぬ挙動により離脱することを
防止し、複列配置の深溝型玉軸受としての機能と信頼性
の向上が可能になる。According to the above-described embodiment, by installing the retainer on the outer ring side of the double-row deep groove ball bearing, the upper and lower two rows of deep groove ball bearing outer ring races are independently formed. And it is possible to maintain the parallelism so that the contact angle between the outer ring race and the ball of the deep groove type ball bearing upper and lower two rows becomes equal. As a result, the distribution of the thrust load is firmly distributed to the upper and lower deep groove ball bearings, and it can be ensured that the thrust load is evenly distributed. Also, in the unlikely event that wear of the ball or the like of the ball bearing increases the play, the ring spacer on the outer ring side is prevented from coming off due to unexpected behavior, and its function and reliability as a double-row deep groove ball bearing The performance can be improved.
【００３０】また、単列深みぞ型の玉軸受を複列配置し
シャフト１２に一体固定し、リテ−ナ２０と、ベアリン
グハウジング１５ｄと隙間を設けた構造とすることによ
り、ポンプ通常運転時はスラストバランス平衡装置１７
による軸移動がスムーズに行われることは言うまでもな
く、玉軸受にはスラスト荷重が負荷されず、ラジアル荷
重は、静圧軸受との組合せによりほとんど負荷されるこ
となく運転され、ポンプの長期安定運転に貢献できる。In addition, a single row deep groove type ball bearing is arranged in a double row and is integrally fixed to the shaft 12 so that a gap is provided between the retainer 20 and the bearing housing 15d. Thrust balance equilibrium device 17
Needless to say, the axial movement is smoothly carried out, the thrust load is not applied to the ball bearing, and the radial load is operated with almost no load by the combination with the hydrostatic bearing. Can contribute.
【００３１】図４に、本発明に係る液化ガスタンク用潜
没ポンプ装置の複列配置した深溝型玉軸受の内輪を固定
するリテーナは、複列配置した深溝型玉軸受の周方向に
対して、適度なはめあいと同軸度を保つ状態で固定さ
れ、軸方向に対しては、上端部は、ポンプ回転軸の突起
部が載る座面があり、下端部は、複列配置した深溝型玉
軸受に冷しばめして挿入する程度の突起部を設けて固定
して一体型構造にしたものであり、組立て作業性が向上
する。FIG. 4 shows that the retainer for fixing the inner ring of the double-row deep groove type ball bearing of the liquefied gas tank submerged pump apparatus according to the present invention is provided in the circumferential direction of the double row deep-groove type ball bearing. It is fixed in a state that maintains appropriate fit and coaxiality.In the axial direction, the upper end has a seating surface on which the protrusion of the pump rotating shaft is mounted, and the lower end is a deep groove ball bearing arranged in multiple rows. The protrusions are inserted and fixed to form an integrated structure, which improves the workability of assembly.
【００３２】図５に、複列配置した深溝型玉軸受の内輪
を固定するリテーナは、複列配置した深溝型玉軸受の周
方向に対して、適度なはめあいと同軸度を保つ状態で固
定され、軸方向に対しては、上端部は、ポンプ回転軸の
突起部が載る座面があり、下端部は、複列配置した深溝
型玉軸受の高さと合わせた精密加工面を有し、玉軸受の
内輪を抑える程度のリング状のプレートをねじ締結体で
固定することにより複列配置した深溝型玉軸受の内輪を
固定して分割型構造としたものであり、冷し嵌め作業が
不要であり、機械加工のみですむものである。Referring to FIG. 5, the retainer for fixing the inner ring of the deep groove ball bearings arranged in a double row is fixed in the circumferential direction of the deep groove ball bearings arranged in a double row while maintaining an appropriate fit and coaxiality. In the axial direction, the upper end has a seating surface on which the projection of the pump rotating shaft rests, and the lower end has a precision machined surface that matches the height of the deep groove ball bearings arranged in multiple rows. By fixing a ring-shaped plate with a screw fastener to the extent that suppresses the inner ring of the bearing, the inner ring of the deep groove type ball bearing arranged in multiple rows is fixed and a split type structure, so that cold fitting work is unnecessary. Yes, only machining is required.
【００３３】[0033]
【発明の効果】液化ガスタンク用立軸形潜没ポンプ装置
のポンプ起動時に負荷するスラスト荷重を深溝型玉軸受
を複列配置したことにより、荷重均等分配性を確保し、
複列配置の深溝型玉軸受としての機能と信頼性が向上
し、更に軸受長寿命化によりポンプの長期安定運転が可
能になる。According to the vertical shaft type submerged pump device for a liquefied gas tank, the thrust load to be applied at the time of starting the pump is arranged in double rows of deep groove type ball bearings, thereby ensuring uniform load distribution.
The function and reliability of the double-row deep groove ball bearing are improved, and the long life of the bearing enables long-term stable operation of the pump.
【図１】本発明の液化ガスタンク用潜没ポンプ装置の実
施例縦断面図である。FIG. 1 is a longitudinal sectional view of an embodiment of a submerged pump device for a liquefied gas tank according to the present invention.
【図２】本発明の複列配置の深みぞ型玉軸受の実施例断
面図である。FIG. 2 is a sectional view of an embodiment of the double grooved deep groove ball bearing of the present invention.
【図３】本発明の他の例による複列配置の深みぞ型玉軸
受の実施例断面図である。FIG. 3 is a sectional view of an embodiment of a double-groove arrangement of deep groove ball bearings according to another example of the present invention.
【図４】本発明の更に他の例による複列配置の深みぞ型
玉軸受の実施例断面図である。FIG. 4 is a cross-sectional view of an embodiment of a double-row deep groove ball bearing according to still another example of the present invention.
【図５】本発明の更に他の例による複列配置の深みぞ型
玉軸受の実施例断面図である。FIG. 5 is a cross-sectional view of an embodiment of a double grooved deep groove ball bearing according to still another embodiment of the present invention.
【図６】従来の液化ガスタンク用潜没ポンプ設備の略示
断面図である。FIG. 6 is a schematic sectional view of a conventional immersion pump equipment for a liquefied gas tank.
【図７】液化ガスタンク用潜没ポンプの起動直後のシス
テムヘッドカーブである。FIG. 7 is a system head curve immediately after activation of a submerged pump for a liquefied gas tank.
１…液化ガスタンク、２…揚液管、３…吸込弁、４…吊
り下げ用ワイヤ、５…潜没ポンプ、６…座面、７…吐出
管、８…ヘッドプレート、９…モータロータ、１０…モ
ータステータ、１１…ステージ、１２…ポンプ軸、１３
…羽根車、１４…下軸受、１５…中軸受、１５ａ、１５
ｂ…単列配置深溝型玉軸受、１５ｃ…リングスペーサ、
１５ｆ…ボール、１５ｇ…保持器、１６…上軸受、１７
…軸スラスト平衡装置、１８…ケーシング、１９Ａ、１
９Ｂ…静圧軸受、２０…リテ−ナ、２１…リング状プレ
−ト、Ｆ…荷重、θ…接触角DESCRIPTION OF SYMBOLS 1 ... Liquefied gas tank, 2 ... Liquid pipe, 3 ... Suction valve, 4 ... Hanging wire, 5 ... Submersible pump, 6 ... Seat surface, 7 ... Discharge pipe, 8 ... Head plate, 9 ... Motor rotor, 10 ... Motor stator, 11: stage, 12: pump shaft, 13
... impeller, 14 ... lower bearing, 15 ... middle bearing, 15a, 15
b: Single row deep groove ball bearing, 15c: Ring spacer,
15f: ball, 15g: cage, 16: upper bearing, 17
... Axial thrust balance device, 18 ... Casing, 19A, 1
9B: hydrostatic bearing, 20: retainer, 21: ring-shaped plate, F: load, θ: contact angle
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−301990（ＪＰ，Ａ) 特開 平７−317695（ＪＰ，Ａ) 特開 平７−119680（ＪＰ，Ａ) 実開 昭59−41694（ＪＰ，Ｕ) 実開 昭59−62299（ＪＰ，Ｕ) 特公 昭61−5558（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) F04D 7/02 F04D 13/08 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-301990 (JP, A) JP-A-7-317695 (JP, A) JP-A-7-119680 (JP, A) 41694 (JP, U) Shokai Sho 59-62299 (JP, U) JP-B 61-5558 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) F04D 7/02 F04D 13 / 08
Claims (5)
挿入され、液化ガスタンクからの液化ガスを吸込み、吐
出する液化ガスタンク用潜没ポンプ装置において、ポン
プ軸と該ポンプ軸を回転駆動する駆動部と、ポンプ軸に
沿って駆動部よりも下方の位置に設けられ、液化ガスタ
ンクから吸込んだ液化ガスを昇圧する羽根車と、羽根車
で昇圧した液化ガスを吐出する吐出穴と、ポンプ軸を支
持する複数の軸受と、ポンプ軸に取付けられて軸推力を
平衡させるバランスディスクと、バランスディスク近傍
に設けられた中軸受に複列配置した深溝型玉軸受から構
成されると共に、複列配置した深溝型玉軸受の外輪又は
内輪を固定するリテーナを設けることを特徴とする液化
ガスタンク用立軸形潜没ポンプ装置。1. A liquefied gas tank submerged pump device which is inserted into a liquid pumping pipe suspended in a liquefied gas tank, sucks and discharges liquefied gas from the liquefied gas tank, and drives a pump shaft and a rotary drive of the pump shaft. Part, provided at a position below the drive unit along the pump shaft, and an impeller that pressurizes the liquefied gas sucked from the liquefied gas tank, a discharge hole that discharges the liquefied gas pressurized by the impeller, and a pump shaft. It is composed of a plurality of bearings to be supported, a balance disk attached to the pump shaft to balance the axial thrust, and a deep groove ball bearing arranged in a double row in a middle bearing provided near the balance disk and arranged in a double row. A vertical shaft submerged pump device for a liquefied gas tank, comprising a retainer for fixing an outer ring or an inner ring of a deep groove ball bearing.
ンプ装置において、複列配置した深溝型玉軸受の外輪を
固定するリテーナは、複列配置した深溝型玉軸受の周方
向に対して、適度なはめあいと同軸度を保つ状態で固定
され、軸方向に対しては、下端部は玉軸受の外輪が載る
程度の座面があり、上端部は、複列配置した深溝型玉軸
受に焼きばめして挿入する程度の突起部を設け固定され
る、一体型構造としたことを特徴とする液化ガスタンク
用立軸形潜没ポンプ装置。2. A vertical shaft type submerged pump device for a liquefied gas tank according to claim 1, wherein the retainer for fixing the outer ring of the double-row deep groove ball bearing is arranged in the circumferential direction of the double-row deep groove ball bearing. In the axial direction, the lower end has a seating surface on which the outer ring of the ball bearing can be placed, and the upper end has a double-row deep groove ball bearing. A vertical shaft submerged pump device for a liquefied gas tank, wherein the vertical shaft type submerged pump device has an integral structure in which a projection portion is inserted and fitted and fixed.
ンプ装置において、複列配置した深溝型玉軸受の外輪を
固定するリテーナは、複列配置した深溝型玉軸受の周方
向に対して、適度なはめあいと同軸度を保つ状態で固定
され、軸方向に対しては、下端部は玉軸受の外輪が載る
程度の座面があり、上端部は、複列配置した深溝型玉軸
受の高さと合わせた精密加工面を有し、玉軸受の外輪を
抑える程度のリング状のプレートをねじ締結体で固定す
ることにより複列配置した深溝型玉軸受の外輪を固定す
る、分割型構造としたことを特徴とする液化ガスタンク
用立軸形潜没ポンプ装置。3. A vertical shaft submerged pump device for a liquefied gas tank according to claim 1, wherein the retainer for fixing the outer ring of the double-row deep groove ball bearing is arranged in the circumferential direction of the double-row deep groove ball bearing. In the axial direction, the lower end has a seating surface on which the outer ring of the ball bearing can be placed, and the upper end has a double-row deep groove ball bearing A split-type structure that has a precision machined surface that matches the height, and fixes the outer ring of a deep groove type ball bearing arranged in multiple rows by fixing a ring-shaped plate that suppresses the outer ring of the ball bearing with a screw fastener. A vertical shaft submersible pump device for a liquefied gas tank.
ンプ装置において、上記複列配置した深溝型玉軸受の内
輪を固定するリテーナは、複列配置した深溝型玉軸受の
周方向に対して、適度なはめあいと同軸度を保つ状態で
固定され、軸方向に対しては、上端部は、ポンプ回転軸
の突起部が載る座面があり、下端部は、複列配置した深
溝型玉軸受に冷しばめして挿入する程度の突起部を設け
固定される、一体型構造としたことを特徴とする液化ガ
スタンク用立軸形潜没ポンプ装置。4. A vertical shaft submerged pump device for a liquefied gas tank according to claim 1, wherein the retainer for fixing the inner ring of the double-row deep groove ball bearing is arranged in the circumferential direction of the double-row deep groove ball bearing. In the axial direction, the upper end has a seat surface on which the protrusion of the pump rotating shaft is mounted, and the lower end has a deep groove type ball arranged in multiple rows. A vertical shaft submerged pump device for a liquefied gas tank, wherein the vertical shaft submerged pump device has an integral structure which is fixed by providing a protruding portion that is inserted into the bearing after being cooled.
ンプ装置において、複列配置した深溝型玉軸受の内輪を
固定するリテーナは、複列配置した深溝型玉軸受の周方
向に対して、適度なはめあいと同軸度を保つ状態で固定
され、軸方向に対しては、上端部は、ポンプ回転軸の突
起部が載る座面があり、下端部は、複列配置した深溝型
玉軸受の高さと合わせた精密加工面を有し、玉軸受の内
輪を抑える程度のリング状のプレートをねじ締結体で固
定することにより複列配置した深溝型玉軸受の内輪を固
定する、分割型構造としたことを特徴とする液化ガスタ
ンク用立軸形潜没ポンプ装置。5. The vertical shaft type submerged pump device for a liquefied gas tank according to claim 1, wherein the retainer for fixing the inner ring of the deep groove type ball bearings arranged in a double row is arranged in the circumferential direction of the deep groove type ball bearings arranged in a double row. In the axial direction, the upper end has a seat surface on which the projection of the pump rotating shaft is mounted, and the lower end has a double-row deep-groove ball bearing in the axial direction. The split-type structure has a precision machined surface that matches the height of the ball bearing, and fixes the inner ring of a deep groove type ball bearing that is arranged in multiple rows by fixing a ring-shaped plate that suppresses the inner ring of the ball bearing with a screw fastener A vertical shaft submerged pump device for a liquefied gas tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13986496A JP3189683B2 (en) | 1996-06-03 | 1996-06-03 | Vertical shaft submersible pump device for liquefied gas tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13986496A JP3189683B2 (en) | 1996-06-03 | 1996-06-03 | Vertical shaft submersible pump device for liquefied gas tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09317677A JPH09317677A (en) | 1997-12-09 |
| JP3189683B2 true JP3189683B2 (en) | 2001-07-16 |
Family
ID=15255332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13986496A Expired - Fee Related JP3189683B2 (en) | 1996-06-03 | 1996-06-03 | Vertical shaft submersible pump device for liquefied gas tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3189683B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4009764B2 (en) * | 1998-02-05 | 2007-11-21 | 株式会社日立プラントテクノロジー | Pump for liquefied gas |
-
1996
- 1996-06-03 JP JP13986496A patent/JP3189683B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09317677A (en) | 1997-12-09 |
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| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313115 |
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