JPH0792074B2 - Lubrication water supply method for bearings of vertical pumps - Google Patents
Lubrication water supply method for bearings of vertical pumpsInfo
- Publication number
- JPH0792074B2 JPH0792074B2 JP1095478A JP9547889A JPH0792074B2 JP H0792074 B2 JPH0792074 B2 JP H0792074B2 JP 1095478 A JP1095478 A JP 1095478A JP 9547889 A JP9547889 A JP 9547889A JP H0792074 B2 JPH0792074 B2 JP H0792074B2
- Authority
- JP
- Japan
- Prior art keywords
- water level
- water
- pumping
- lubricating
- pump
- 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 - Lifetime
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、水路に配備されている排水機場に設置され
て、雨水の排水などに用いられる立軸ポンプの軸受に対
する潤滑水の供給方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for supplying lubricating water to a bearing of a vertical shaft pump installed in a drainage station installed in a waterway and used for draining rainwater and the like.
［従来の技術］ 立軸ポンプの軸受として、自揚水によって潤滑および冷
却がなされて、安定運転を継続できるセラミックス軸受
が採用されている。[Prior Art] As a bearing of a vertical shaft pump, a ceramic bearing that is lubricated and cooled by self-pumping water and can continue stable operation is adopted.
この種の軸受では、ポンプの起動直後のきわめて短い時
間だけドライ運転がなされ、この短い時間が経過する
と、直ちに自揚水によって潤滑および冷却されて安定運
転に入る。即ち、セラミックス軸受では、ドライ運転が
短時間に制限されることになる。In this type of bearing, the dry operation is performed for a very short time immediately after the pump is started, and after this short time, it is immediately lubricated and cooled by the self-lifting water to start the stable operation. That is, in the ceramic bearing, the dry operation is limited to a short time.
一方、都市化の急激な進展に伴い、水路に配備されてい
る揚水機場への雨水流入量が著しく増大している。この
ような状況には、排水機場における吸水井の水位が立軸
ポンプの揚水遮断水位以下に低下してもドライ運転を継
続して、ポンプの運転状態を先行させる先行待機運転や
気中管理運転を行うことによって対応している。On the other hand, with the rapid progress of urbanization, the inflow of rainwater to pumping stations located in waterways has increased significantly. In such a situation, even if the water level of the suction well at the drainage pump station drops below the pumping cutoff water level of the vertical shaft pump, the dry operation is continued, and the pre-standby operation and the air management operation that precede the operation state of the pump are performed. It is handled by doing.
［発明が解決しようとする課題］ 前記先行待機運転や気中管理運転に使用される立軸ポン
プでは、長時間ドライ運転が継続されることになる。し
たがって、先行待機運転や気中管理運転を行う立軸ポン
プに、ドライ運転時間が短時間に制限されるセラミック
ス軸受を採用し得なかった。[Problems to be Solved by the Invention] In the vertical shaft pump used for the preceding standby operation or the air management operation, the dry operation is continued for a long time. Therefore, it has not been possible to employ a ceramic bearing whose dry operation time is limited to a short time in a vertical shaft pump that performs a preceding standby operation and an air management operation.
本発明は上記実情に鑑みてなされたもので、先行待機運
転や気中管理運転のように、ドライ運転が長時間継続さ
れる立軸ポンプであっても、セラミックス軸受の採用を
可能とでき、しかも、潤滑水を効率良く供給することが
できる立軸ポンプの軸受に対する潤滑水の供給方法を提
供することを目的としている。The present invention has been made in view of the above circumstances, and it is possible to adopt a ceramic bearing even in a vertical pump in which a dry operation is continued for a long time, such as a preceding standby operation or an air management operation, and An object of the present invention is to provide a method for supplying lubricating water to a bearing of a vertical shaft pump that can efficiently supply the lubricating water.
［課題を解決するための手段］ 上記目的を達成するために、本発明は、水位が揚水開始
水位以上になると揚水運転がなされ、水位が揚水遮断水
位以下になるとドライ運転に切換えられるように構成さ
れた立軸ポンプの主軸を軸支しているセラミックス軸受
に対して、潤滑水供給源と該軸受を連通させる管路に介
在されてなる潤滑水供給系により潤滑水を供給する方法
であって、水位検知器を用いて立軸ポンプ固有の揚水開
始水位および揚水遮断水位をそれぞれ検知し、揚水開始
水位以上の検知時に前記潤滑水供給系を閉成して、前記
軸受に対する潤滑水の供給を止め、かつ、ポンプを運転
させた際の水位が揚水開始水位未満の時および水位低下
にともなう揚水遮断水位以下の検知時に前記潤滑水供給
系を開成して、前記軸受に対して潤滑水を供給するよう
にしたものである。[Means for Solving the Problems] In order to achieve the above object, the present invention is configured such that when the water level is above the pumping start water level, pumping operation is performed, and when the water level is below the pumping cutoff water level, it is switched to dry operation. A method of supplying lubricating water to a ceramics bearing rotatably supporting a main shaft of a vertical shaft pump by a lubricating water supply system that is interposed in a pipeline connecting the lubricating water supply source and the bearing, Detecting the pumping start water level and pumping cutoff water level specific to the vertical pump using the water level detector, closing the lubricating water supply system when detecting the pumping start water level or higher, and stopping the supply of lubricating water to the bearing, And, when the water level when the pump is operated is less than the pumping start water level and when the pumping cutoff water level or less due to the water level drop is detected, the lubricating water supply system is opened to supply the lubricating water to the bearing. It is something that is supplied.
［作用］ 本発明によれば、立軸ポンプを運転させた時の水位が揚
水開始水位未満の場合は、潤滑水供給系の開成によって
軸受に潤滑水を供給する。水位が立軸ポンプの揚水開始
水位以上に上昇すると、その水位が水位検知器によって
検知されて潤滑水供給系が閉成されて軸受に対する潤滑
水の供給が止められる。ここで、軸受は揚水運転を開始
したポンプの自揚水によって潤滑および冷却される。[Operation] According to the present invention, when the water level when the vertical pump is operated is lower than the pumping start water level, the lubricating water is supplied to the bearing by opening the lubricating water supply system. When the water level rises above the pumping start water level of the vertical pump, the water level is detected by the water level detector, the lubricating water supply system is closed, and the supply of lubricating water to the bearing is stopped. Here, the bearing is lubricated and cooled by the self-pumping of the pump that started the pumping operation.
また、ポンプの運転中の水位の低下にともない水位が揚
水遮断水位以下になると、その水位が水位検知器によっ
て検知されて潤滑水供給系が開成される。そのために、
ポンプがドライ運転に切換えられても、潤滑水が軸受に
供給されて潤滑および冷却されるので、安定運転を継続
できる。Further, when the water level becomes lower than the pumping cutoff water level due to the decrease of the water level during the operation of the pump, the water level is detected by the water level detector and the lubricating water supply system is opened. for that reason,
Even if the pump is switched to the dry operation, the lubricating water is supplied to the bearings for lubrication and cooling, so that stable operation can be continued.
さらに、ポンプ運転中の水位を水位検知器によって検知
することにより、ポンプの運転状態を判別して潤滑水の
供給の要否を決定しているので、潤滑水の供給の無駄を
なくすることができる。Further, by detecting the water level during pump operation by the water level detector, it is possible to determine the necessity of supplying the lubricating water by determining the operating state of the pump. it can.
［実施例］ 以下、本発明の実施例を図面に基づいて説明する。[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明にかかる方法によって、軸受に潤滑水を
供給するようにした立軸ポンプを示し、図において、立
軸ポンプ１の主軸２は羽根車３上側のガイドベーン４の
基部に固定された軸受５と、吸水井６の床面７と略同じ
高さレベルに固定されている軸受８によって回転自在に
軸支され、図示されていない原動機により回転駆動され
る。FIG. 1 shows a vertical shaft pump for supplying lubricating water to a bearing by the method according to the present invention. In the drawing, a main shaft 2 of the vertical shaft pump 1 is fixed to a base of a guide vane 4 above an impeller 3. The bearing 5 is rotatably supported by a bearing 8 fixed at substantially the same level as the floor surface 7 of the water absorption well 6, and is rotationally driven by a prime mover (not shown).
前記軸受5,8はそれぞれ炭化ケイ素などのセラミックス
によって形成されており、それぞれに潤滑水供給系９か
ら潤滑および冷却用の潤滑水が供給されるようになって
いる。The bearings 5 and 8 are each made of ceramics such as silicon carbide, and lubricating water for lubricating and cooling is supplied to each from a lubricating water supply system 9.
潤滑水供給系９は潤滑水供給源9Aと、この潤滑水供給源
9Aと軸受5,8を連通させる管路9Bおよび該管路9Bに介設
した、例えば電磁弁や電動ボール弁などの弁9Cによって
構成されている。したがって、弁9Cの開弁時に潤滑水供
給源9Aから軸受5,8に潤滑水の供給がなされ、弁9Cの閉
弁時には軸受5,8に対する潤滑水の供給が止められる。The lubricating water supply system 9 includes a lubricating water supply source 9A and this lubricating water supply source
It is composed of a pipe line 9B for communicating 9A with the bearings 5 and 8, and a valve 9C such as an electromagnetic valve or an electric ball valve provided in the pipe line 9B. Therefore, when the valve 9C is opened, the lubricating water supply source 9A supplies the lubricating water to the bearings 5 and 8, and when the valve 9C is closed, the supply of the lubricating water to the bearings 5 and 8 is stopped.
水位検知器10は立軸ポンプ１固有の揚水開始水位HWLと
揚水遮断水位LWLを検知するためのもので、フロート式
検知器によって構成され、ここからの水位検知信号が潤
滑水供給源9Aの管路8Bに介設されている弁9Cに出力され
るようになっており、水位が揚水開始水位HWL以上に達
した時に弁9Cを閉成させ、水位が揚水遮断水位LWL以下
に低下した時には弁9Cを開成して、潤滑水供給源9Aから
管路8Bを通して軸受5,8のそれぞれに潤滑水を供給す
る。The water level detector 10 is for detecting the pumping start water level HWL and the pumping cutoff water level LWL unique to the vertical pump 1, and is composed of a float type detector, and the water level detection signal from this is used as a conduit for the lubricating water supply source 9A. It is designed to be output to the valve 9C installed in 8B.When the water level reaches the pumping start water level HWL or higher, the valve 9C is closed, and when the water level drops below the pumping cutoff water level LWL, the valve 9C is closed. Is opened to supply the lubricating water from the lubricating water supply source 9A to the bearings 5 and 8 through the pipe 8B.
つぎに、軸受5,8に対する潤滑水の供給手順について説
明する。Next, a procedure for supplying lubricating water to the bearings 5 and 8 will be described.
主軸２が回転駆動されている立軸ポンプ１の運転状態に
おいて、吸水井６の水位が揚水開始水位HWL以上であれ
ば、羽根車３によって水が吸い揚げられる揚水運転がな
される。この場合、水位検知器10から出力される信号に
よって弁9Cが閉成され、軸受5,8に対して潤滑水は供給
されないけれども、軸受5,8は羽根車３によって吸い揚
げられる自揚水によって潤滑および冷却されることにな
る。In the operating state of the vertical shaft pump 1 in which the main shaft 2 is rotationally driven, if the water level of the suction well 6 is equal to or higher than the pumping start water level HWL, the pumping operation in which water is pumped up by the impeller 3 is performed. In this case, the valve 9C is closed by the signal output from the water level detector 10, and the lubricating water is not supplied to the bearings 5 and 8, but the bearings 5 and 8 are lubricated by the self-pumped water sucked up by the impeller 3. And will be cooled.
揚水運転の継続によって、水位が揚水開始水位HWL未満
に低下しても、揚水遮断水位LWLに低下するまでの間
は、弁9Cの閉成状態が保持されるとともに、自揚水によ
る軸受5,8の潤滑および冷却が継続される。Even if the water level drops below the pumping start water level HWL due to continuous pumping operation, the closed state of the valve 9C is maintained and the bearings 5-8 Lubrication and cooling are continued.
水位が揚水遮断水位LWLに低下すると、立軸ポンプ１が
ドライ運転に切換えられる。同時にこの水位が水位検知
器10によって検知され、ここから出力される信号によっ
て弁9Cを開弁させる。その結果、潤滑水供給系９の潤滑
水供給源9Aから管路9Bを通して軸受5,8に潤滑水が供給
され、これによって潤滑および冷却を行う。したがっ
て、立軸ポンプ１がドライ運転に切換えられて、自揚水
により軸受5,8が潤滑されなくなっても、潤滑水供給系
９から供給される潤滑水によって潤滑がなされ、安定運
転を継続するものである。勿論、立軸ポンプ１を運転さ
せた際の水位が揚水開始水位HWL未満の時は、それが水
位検知器10によって検知されて、潤滑水供給系９が開成
され、潤滑水供給源9Aから軸受5,8に潤滑水が供給され
る。When the water level drops to the pumping cutoff water level LWL, the vertical shaft pump 1 is switched to dry operation. At the same time, this water level is detected by the water level detector 10, and the valve 9C is opened by the signal output from this. As a result, the lubricating water is supplied from the lubricating water supply source 9A of the lubricating water supply system 9 to the bearings 5 and 8 through the pipe 9B, thereby performing lubrication and cooling. Therefore, even if the vertical pump 1 is switched to the dry operation and the bearings 5 and 8 are no longer lubricated by the self-pumping water, the lubrication water supplied from the lubrication water supply system 9 lubricates the bearings 5 and 8 to continue the stable operation. is there. Of course, when the water level when the vertical pump 1 is operated is lower than the pumping start water level HWL, it is detected by the water level detector 10, the lubricating water supply system 9 is opened, and the lubricating water supply source 9A to the bearing 5 , 8 is supplied with lubricating water.
ドライ運転の継続によって、吸水井６の水位が上昇し
て、揚水開始水位HWLに達すると、前述のように揚水運
転に切換えられ、軸受5,8は自揚水によって潤滑される
ことになる。When the water level of the suction well 6 rises due to the continuation of the dry operation and reaches the pumping start water level HWL, the pumping operation is switched as described above, and the bearings 5 and 8 are lubricated by the self pumping.
このように、立軸ポンプ１のドライ運転中は、潤滑水供
給系９から供給される潤滑水によって軸受5,8の潤滑お
よび冷却がなされるので、ドライ運転が長時間継続され
る先行待機運転や気中管理運転を行う立軸ポンプ１に
も、セラミックス軸受5,8を採用することができる。As described above, during the dry operation of the vertical shaft pump 1, the lubricating water supplied from the lubricating water supply system 9 lubricates and cools the bearings 5 and 8. The ceramic bearings 5 and 8 can also be adopted in the vertical pump 1 that performs the air management operation.
ところで、例えば立軸ポンプ１の運転前の水位のみから
潤滑水の供給の要否を判断することも考えられるが、こ
の場合は、潤滑水の供給効率がよくない。すなわち、ポ
ンプ１の運転前の水位が、例えば羽根車３の上縁より下
位であっても、ポンプ１の運転開始によって揚水が開始
されるが、このとき、上記水位検知器10の検知によって
潤滑水の供給が開始されてしまい、これがポンプ１の運
転停止まで継続されるので、潤滑水が無駄に供給される
ことになる。これに対して、上記実施例のように、立軸
ポンプ１の運転中の水位を検知することにより、該立軸
ポンプ１が揚水運転状態かドライ運転状態かを判別し、
これに基づいて潤滑水の供給の要否を決定しているの
で、自揚水により潤滑されていることから本来不要な潤
滑水が無駄に供給されることもない。Incidentally, for example, it may be possible to judge the necessity of supplying the lubricating water only from the water level before the operation of the vertical shaft pump 1, but in this case, the lubricating water supply efficiency is not good. That is, even if the water level before the operation of the pump 1 is lower than the upper edge of the impeller 3, for example, pumping is started when the operation of the pump 1 is started. Since the water supply is started and continues until the pump 1 is stopped, the lubricating water is wastefully supplied. On the other hand, as in the above embodiment, by detecting the water level during operation of the vertical shaft pump 1, it is determined whether the vertical shaft pump 1 is in the pumping operation state or the dry operation state,
Since the necessity of supplying the lubricating water is determined based on this, since the lubricating water is lubricated by the self-lifting water, the originally unnecessary lubricating water is not wastefully supplied.
［発明の効果］ 以上説明したように、本発明によれば、水位が揚水開始
水位以上になった時に水位検知器からの信号によって、
潤滑水供給系を閉成して、自揚水で軸受を潤滑および冷
却し、このように自揚水によって軸受を潤滑することが
できなくなる水位になれば、この時の水位を検知する水
位検知器からの信号によって、潤滑水供給系を開成し
て、ここからの潤滑水によって軸受を潤滑および冷却し
て、安定運転を継続させることができるので、従来より
採用不可能とされていた先行待機運転や気中管理運転を
行う立軸ポンプにも、セラミックス軸受の採用が可能に
なり、汎用性の向上を実現できる。[Effect of the Invention] As described above, according to the present invention, when the water level becomes equal to or higher than the pumping start water level, the signal from the water level detector causes
If the lubricating water supply system is closed and the bearing is lubricated and cooled by self-pumping water, and if the water level at which the bearing cannot be lubricated by self-pumping water is reached, the water level detector that detects the water level at this time Signal to open the lubrication water supply system and lubricate and cool the bearings with the lubrication water from this to continue stable operation. Ceramic bearings can also be used in vertical pumps that perform air management operation, which can improve versatility.
しかも、立軸ポンプの運転中の水位を検知することで、
立軸ポンプの運転状態を判別し、これによって、潤滑水
の供給の要否を決定することが可能であるから、潤滑水
の無駄な供給をなくして、効率の良い潤滑水供給を行な
わせることができる。Moreover, by detecting the water level during operation of the vertical pump,
It is possible to determine the necessity of supplying the lubricating water by judging the operating state of the vertical shaft pump. Therefore, it is possible to eliminate the wasteful supply of the lubricating water and to supply the lubricating water efficiently. it can.
第１図は本発明にかかる方法に適用される立軸ポンプの
実施例を示す概略構成図である。 １……立軸ポンプ ２……主軸 5,8……セラミックス軸受 ９……潤滑水供給系 9A……潤滑水供給源 9B……管路 9C……弁 10……水位検知器 HWL……揚水開始水位 LWL……揚水遮断水位FIG. 1 is a schematic configuration diagram showing an embodiment of a vertical shaft pump applied to the method according to the present invention. 1 …… Vertical pump 2 …… Spindle 5,8 …… Ceramics bearing 9 …… Lubrication water supply system 9A …… Lubrication water supply source 9B …… Pipe line 9C …… Valve 10 …… Water level detector HWL …… Pump pump start Water level LWL ... pumping cutoff water level
Claims (1)
がなされ、水位が揚水遮断水位以下になるとドライ運転
に切換えられるように構成された立軸ポンプの主軸を軸
支しているセラミックス軸受に対して、潤滑水供給源と
該軸受を連通させる管路に介在されてなる潤滑水供給系
により潤滑水を供給する方法であって、水位検知器を用
いて立軸ポンプ固有の揚水開始水位および揚水遮断水位
をそれぞれ検知し、揚水開始水位以上の検知時に前記潤
滑水供給系を閉成して、前記軸受に対する潤滑水の供給
を止め、かつ、ポンプを運転させた際の水位が揚水開始
水位未満の時および水位低下にともなう揚水遮断水位以
下の検知時に前記潤滑水供給系を開成して、前記軸受に
対して潤滑水を供給するようにしたことを特徴とする立
軸ポンプの軸受に対する潤滑水の供給方法。1. A ceramic bearing supporting a main shaft of a vertical shaft pump configured to perform a pumping operation when the water level is above the pumping start water level and to switch to a dry operation when the water level is below the pumping cutoff water level. Is a method of supplying lubricating water by means of a lubricating water supply system that is interposed in a pipeline that connects the lubricating water supply source and the bearing, and uses a water level detector to specify the pumping start water level and pumping cutoff specific to the vertical pump. Each of the water levels is detected, and when the pumping start water level or higher is detected, the lubricating water supply system is closed, the supply of lubricating water to the bearing is stopped, and the water level when the pump is operated is less than the pumping start water level. In a bearing of a vertical axis pump, the lubricating water supply system is opened to supply the lubricating water to the bearing at the time of detection of the pumping water cutoff water level or less due to lowering of the water level. The method of supplying lubricating water to be.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1095478A JPH0792074B2 (en) | 1989-04-14 | 1989-04-14 | Lubrication water supply method for bearings of vertical pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1095478A JPH0792074B2 (en) | 1989-04-14 | 1989-04-14 | Lubrication water supply method for bearings of vertical pumps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02275091A JPH02275091A (en) | 1990-11-09 |
| JPH0792074B2 true JPH0792074B2 (en) | 1995-10-09 |
Family
ID=14138729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1095478A Expired - Lifetime JPH0792074B2 (en) | 1989-04-14 | 1989-04-14 | Lubrication water supply method for bearings of vertical pumps |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0792074B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022384B (en) * | 2010-12-09 | 2013-06-12 | 江苏大学 | Hard alloy sliding bearing water-diversion cooling and lubrication system of mine submersible pump |
| CN109974805A (en) * | 2019-04-08 | 2019-07-05 | 江南造船(集团)有限责任公司 | A kind of liquid level monitoring device and its installation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6323599U (en) * | 1986-07-29 | 1988-02-16 |
-
1989
- 1989-04-14 JP JP1095478A patent/JPH0792074B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02275091A (en) | 1990-11-09 |
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