JPS588869A - Water sealing device in feed water pump for boiler - Google Patents
Water sealing device in feed water pump for boilerInfo
- Publication number
- JPS588869A JPS588869A JP10699781A JP10699781A JPS588869A JP S588869 A JPS588869 A JP S588869A JP 10699781 A JP10699781 A JP 10699781A JP 10699781 A JP10699781 A JP 10699781A JP S588869 A JPS588869 A JP S588869A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- water
- pressure
- deaerator
- rotor balance
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
- F04D29/128—Shaft sealings using sealing-rings especially adapted for liquid pumps with special means for adducting cooling or sealing fluid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はバーレル形多段タービン式のボイラ給水ポンプ
用射水装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water injection device for a barrel-type multi-stage turbine boiler feed water pump.
従来、パーレル形多段タービン式のボイラ給水ポンプに
おいては、第１図、第２図に示すように、ボイラ給水ポ
ンプ２の吐出側にのみローターバランス室（図示せず）
を設け、該ローターバランス室と、脱気器２３からの給
水を昇圧するブースタポンプ１の吐出配管１８（すなわ
ちボイラ給水ポンプ２の吸込配管）とをローターバラン
ス用配管１９により接続し、ローターバランス室内圧を
減圧用プクエおよび減圧用スリーブでなる封水減圧ｆｆ
１ｌ（図示せず）によ如ボイラ給水ボ／プ吸込圧に減圧
していた。一方、ボイラ給水ポンプの射水は、復水ブー
スタポンプまたは封水ポンプ（いずれも図示せず）から
封水配管２０および吸込側流路２０ａ１吐出側流路２０
ｂｔ−通して吸込側、吐出側の軸封ｆｌｌ（なお、第２
図において、３は１段目インペラ、４はケージ／ブリン
グ、５はスプリングであシ、吸込側軸封部は、シャフト
１３の嵌着したシールスリーブ１２の外周面に対面する
ように包囲させたローティングリング８と、これらを保
持する２ンタ／りング９、リテーナ−プレート１０、グ
ランドカバー７、減圧用ケース、および渦巻ガスケット
１１からなる）へ供給されるが、ポンプ内の温水を外に
漏らさないように、コノトロール弁（図示せず）によシ
、ポンプ内圧よりもＩ Ｋｔｔ／ｃｍ” ｉｉ！度高い
封水圧力に制御していた。Conventionally, in a parrel type multi-stage turbine type boiler feed pump, as shown in FIGS. 1 and 2, a rotor balance chamber (not shown) is provided only on the discharge side of the boiler feed pump 2.
The rotor balance chamber is connected to the discharge pipe 18 of the booster pump 1 (that is, the suction pipe of the boiler feed water pump 2) that boosts the pressure of water supplied from the deaerator 23 by a rotor balance pipe 19, and the rotor balance chamber is Water sealing pressure reduction ff consisting of a pressure reduction pukue and a pressure reduction sleeve
1 liter (not shown) was used to reduce the pressure to the boiler feedwater pump suction pressure. On the other hand, water from the boiler feed pump is injected from the condensate booster pump or the sealing pump (none of which is shown) to the sealing pipe 20, the suction side flow path 20a1 and the discharge side flow path 20a.
bt- through the suction side and discharge side shaft seals (in addition, the second
In the figure, 3 is a first stage impeller, 4 is a cage/ring, 5 is a spring, and the suction side shaft seal is surrounded so as to face the outer peripheral surface of the seal sleeve 12 fitted with the shaft 13. The hot water inside the pump is supplied to a rotating ring (composed of a rotating ring 8, a two-way ring 9 that holds these, a retainer plate 10, a ground cover 7, a decompression case, and a swirl gasket 11), but the hot water inside the pump is In order to prevent leakage, a control valve (not shown) was used to control the water sealing pressure to a degree higher than the internal pressure of the pump.
しかし、近年、ボイラ給水ポンプ２に前置されるブース
タポンプ１の吐出圧力が高くなっておシ、これに伴なっ
て復水ブースタポンプ（ｔたは封水ポンプ）および封水
配管２０の設計圧力が高くなる傾向にあシ、その結果、
復水ブースタポンプ（または封水ポンプ）および封水配
管２０の価格が高くなって来ている。また、従来、吐出
側にのみローターバー）／ス室が設けられていて該ロー
ターバランス室がブースタポンプｌの吐出配管１８に配
管１９によシ接続されておシ、該配管１９における圧力
損失の形勢によシ、吸込圧力よシもローターバランス室
圧力の方が高くなシ、吸込側の封水圧力とポンプ内部圧
力との差圧が大となシル封水が直接ポンプ内部に入るこ
とがあった。また、軸封部と大気側圧力との差圧が大き
いため、フローティングリングの段数も多くなる。この
ようなことから、従来技術によると１高い信頼性が要求
され、装置価格が高いものとなってしまうという欠点が
あった。However, in recent years, the discharge pressure of the booster pump 1 installed in front of the boiler feed pump 2 has become higher. The pressure tends to increase, and as a result,
The prices of condensate booster pumps (or sealing pumps) and sealing piping 20 are becoming higher. Furthermore, conventionally, a rotor balance chamber is provided only on the discharge side, and the rotor balance chamber is connected to the discharge piping 18 of the booster pump l by a piping 19. Depending on the situation, the rotor balance chamber pressure is higher than the suction pressure, and the difference between the seal water pressure on the suction side and the pump internal pressure is large, so seal water may directly enter the pump. there were. Furthermore, since the differential pressure between the shaft seal portion and the atmospheric pressure is large, the number of stages of the floating ring also increases. For this reason, the prior art requires high reliability and has the drawback of increasing the cost of the device.
本発明の目的は、封水圧力を低下させることが可能であ
って、封水供給用ポンプ（封水ポンプまたは復水ブース
タポンプ）に要求される設計圧力並びに封水配管の設計
圧力を低下させることが可能となる構成のボイラ給水ポ
ンプ用封水装Ｔ１１′ｆｒ：提供することにある。An object of the present invention is to reduce the sealing pressure, and to reduce the design pressure required for the sealing water supply pump (sealing pump or condensate booster pump) and the design pressure of the sealing piping. An object of the present invention is to provide a water sealing device T11'fr for a boiler feed water pump having a configuration that enables this.
本発明の特徴は、ボイラ給水ポンプの吐出側のみならず
吸込側にもロータバランス室を設け、これらのロータバ
ランス室を配管を介して脱気器を接続することにより、
ロータバランス室を脱気器内圧に低減するようにしたこ
とにある。The feature of the present invention is that rotor balance chambers are provided not only on the discharge side of the boiler feed pump but also on the suction side, and by connecting these rotor balance chambers to a deaerator via piping,
The reason is that the pressure in the rotor balance chamber is reduced to the deaerator internal pressure.
以下本発明の一実施例を第３図、第４図によシ説明する
。第３図、第４図において、第１図、第２図と同一符号
は同じ機能を有する構成部品を示、す、２１はボイラ給
水ポンプ２の吸込側に設けたロータバランス室であシ、
該ロータバランス室２１は、図示しない吐出側と同様に
、７０−ティングリング８が装着され丸軸封部と、ポン
プ内部に連通させる減圧用プシエ１４および減圧用スリ
ーブ１５からなる封水減圧部との間に形成されている。An embodiment of the present invention will be explained below with reference to FIGS. 3 and 4. 3 and 4, the same reference numerals as in FIGS. 1 and 2 indicate components having the same functions. 21 is a rotor balance chamber provided on the suction side of the boiler feed pump 2;
Similar to the discharge side (not shown), the rotor balance chamber 21 includes a round shaft sealing part to which a 70-ting ring 8 is attached, and a water-sealing pressure reducing part consisting of a pressure reducing pusher 14 and a pressure reducing sleeve 15 communicating with the inside of the pump. is formed between.
該ロータバランス室２１と吐出側ロ−ターランス室は、
それぞれケーシングに設けた流路２２３１、２２ｂ、お
よび共通の配管２２を介して脱気器２３に接続されてい
る。これにょシ、ロータバランス室２１は、ポンプ内圧
が３〜４Ｖ−程度とな如、封水圧力も５〜６に９／ａｄ
程度ですみ、図示のように大気圧側の７０−ティングリ
ング８も２段程度減らすことができる。さらに、吸込側
、吐出側ロータパ２ンｊ％１ａｔ−共通の配管２２で脱
気器２３に接続することによシ、吸込側、吐出側共に同
じ差で封水を供給することができ、封水が直接ポンプ２
内部に入ることがなくなシ、ポンプ２のウオーＺング効
果を高めることができる。The rotor balance chamber 21 and the discharge side rotor lance chamber are
They are connected to the deaerator 23 via channels 2231 and 22b provided in the casing, respectively, and a common piping 22. In this case, the rotor balance chamber 21 has a pump internal pressure of about 3 to 4 V, and a sealing pressure of 5 to 6 9/ad.
As shown in the figure, the number of 70-ring rings 8 on the atmospheric pressure side can also be reduced by about two stages. Furthermore, by connecting the suction side and discharge side rotor pump 2j%1at to the deaerator 23 through a common piping 22, it is possible to supply sealed water with the same difference on both the suction side and the discharge side. Water pumps directly 2
The pump 2 does not enter the inside, and the walking effect of the pump 2 can be enhanced.
以上述へたように、本発明の特徴は、ポンプ吐出側のみ
ならず吸込側にもロータバランス室を設ｆｆ、 コｔＬ
うのロータバランス室を配管を介して脱気器に接続した
ことにあシ、これＫよってロータバランス室の圧力を脱
気器内圧に低減することが可能となシ、その結果封水圧
力を低減することが可能となる。従って本発明によれば
、封水供給に用いられるポンプおよび配管の設計圧力、
およびゲイ２給水ポンプ軸封邪の規模を小さくすること
が可能となり、信頼性の高いボイラ給水ポンプを提供で
きる。As mentioned above, the feature of the present invention is that the rotor balance chamber is provided not only on the pump discharge side but also on the suction side.
By connecting the rotor balance chamber to the deaerator via piping, it is possible to reduce the pressure in the rotor balance chamber to the deaerator internal pressure, and as a result, the sealing pressure can be reduced. It becomes possible to reduce the amount. Therefore, according to the present invention, the design pressure of the pump and piping used for sealing water supply,
In addition, it becomes possible to reduce the scale of the shaft seal of the Gay 2 water feed pump, and a highly reliable boiler feed pump can be provided.
第１図は従来の封水装置を示す系統図、第２図は従来の
ボイラ給水ポンプの吸込側を示す縦断面図、＃ｇ３図は
本発明の封水装置の一実施例を示す系統図、ｉｇ４図Ｆ
ｉ該実施例におけるボイラ給水ポンプの吸込側を示す縦
断面図である。
１・・・ブースタポンプ、２・・・ボイラ給水ポンプ、
３・・・１段目インペラ、２０・・・封水供給用配管、
２０ａ。
２０ｂ・・・封水供給流路、２１・・・ロータバランス
室、２２・・・配管。
代理人 弁理士 薄田利幸、
・−ノ
ｙＦＪ１図
第 ２ 図
’％３ 図
′″１ｆＪ４ 回Figure 1 is a system diagram showing a conventional water sealing device, Figure 2 is a vertical sectional view showing the suction side of a conventional boiler feed pump, and Figure #g3 is a system diagram showing an embodiment of the water sealing device of the present invention. , ig4 figure F
i is a vertical sectional view showing the suction side of the boiler feed pump in the embodiment; 1... Booster pump, 2... Boiler water pump,
3... 1st stage impeller, 20... Water sealing supply piping,
20a. 20b... Water sealing supply channel, 21... Rotor balance chamber, 22... Piping. Agent Patent Attorney Toshiyuki Usuda, ・-NoyFJ1 Figure 2 Figure '%3 Figure'''1fJ4 times
Claims (1)
１かつ両端軸封部に封水が供給されるパーレル形多段タ
ービン式のボイラ給水ポンプにおいて、ボイラ給水ポン
プの吸込側および吐出側の各軸封部と封水減圧部との間
にそれぞれロータバランス室を設け、これらのロータバ
ランス室を前記脱気ａＫ配管により接続したこ、とを特
徴とするボイラ給水ポンプ用封水装置。In a parrel type multi-stage turbine type boiler feed pump in which the feed water from the deaerator is boosted in pressure by a booster pump and sealed water is supplied to both end shaft seals, each of the suction side and discharge side of the boiler feed water pump is A water sealing device for a boiler feed water pump, characterized in that a rotor balance chamber is provided between the shaft seal portion and the water seal pressure reduction portion, and these rotor balance chambers are connected by the deaeration aK piping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10699781A JPS588869A (en) | 1981-07-10 | 1981-07-10 | Water sealing device in feed water pump for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10699781A JPS588869A (en) | 1981-07-10 | 1981-07-10 | Water sealing device in feed water pump for boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS588869A true JPS588869A (en) | 1983-01-19 |
Family
ID=14447854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10699781A Pending JPS588869A (en) | 1981-07-10 | 1981-07-10 | Water sealing device in feed water pump for boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS588869A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1132624A1 (en) * | 2000-03-09 | 2001-09-12 | Sterling Fluid Systems (Germany) GmbH | Pump casing with separate sealing unit |
| CN103711909A (en) * | 2013-12-17 | 2014-04-09 | 南通密炼捏合机械有限公司 | Horizontal type shaft head sealing structure |
-
1981
- 1981-07-10 JP JP10699781A patent/JPS588869A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1132624A1 (en) * | 2000-03-09 | 2001-09-12 | Sterling Fluid Systems (Germany) GmbH | Pump casing with separate sealing unit |
| CN103711909A (en) * | 2013-12-17 | 2014-04-09 | 南通密炼捏合机械有限公司 | Horizontal type shaft head sealing structure |
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