JPS6098194A - Barrel type multi-stage turbo-pump - Google Patents

Abstract

PURPOSE:To prevent the stationary part, etc. of a multi-stage turbo-pump from being broken due to fatigue caused by thermal stress and vibration, by forming, in an inside casing, a passage for returning leakage water from a balancing mechanism cancelling out thrust load, to the inlet side, instead of conventional pipe line arrangements. CONSTITUTION:A passage 7 for returning leakage water from a balancing mechanism 2 arranged on the side opposite to the suction side 6, to the suction side 6 is formed in the inside casing 3 of a barrel type turbo-pump consisting of an outside casing 4, the inside casing 6 and a rotor 1, so that a pipe line arrangement may be eliminated.

Description

【発明の詳細な説明】 本発明は、ハーレル形多段ターボポンプのスラスト荷重
釣合機構の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the thrust load balancing mechanism of a Harrell type multi-stage turbo pump.

従来のバニレル形多段ターボポンプを第１図と第２図で
説明する。第１図は従来のバーレル形グ段ターボポンプ
の縦断面図、第２図は第１図のＩＩ　−ｌ断面図にして
２図に於てローターｌに発生するスラスト荷重を杓ち消
すためローター１の吸込側と反対側に釣合機構２が設け
らゎている。この釣合機構２からの漏洩水は内部ケーシ
ング３と外部ケーシング４との間を通る戻し配省５によ
り、或いは外部ケーシング４の外側を通る戻し配管５′
によシポンプの吸込側６へ戻される。これらの戻し配管
５，５′は両端が固定されていて熱容近も小さいため、
高温液用ポンプの場合、負荷急変時の熱応力により戻し
配％５．５′やその固定部に熱疲労を生じ易く、捷たポ
ンプ運転中の振動により戻し配管５，５′に強制振動や
共振が起き易く、これによる疲労破壊を防ぐために＃ｊ
願な配省経路や酌殊な配管固定方法か採用され、煩雑な
工程を必要とする。A conventional vanillel type multi-stage turbo pump will be explained with reference to FIGS. 1 and 2. Figure 1 is a vertical cross-sectional view of a conventional barrel-type double-stage turbo pump, and Figure 2 is a cross-sectional view taken along line II-l in Figure 1. A balancing mechanism 2 is provided on the side opposite to the suction side of the mechanism 1. The leakage water from this balancing mechanism 2 is collected by a return pipe 5 passing between the inner casing 3 and the outer casing 4, or by a return pipe 5' passing outside the outer casing 4.
It is returned to the suction side 6 of the pump. Both ends of these return piping 5, 5' are fixed and the heat capacity is small, so
In the case of a pump for high-temperature liquids, the return piping 5.5' and its fixed parts are likely to suffer thermal fatigue due to thermal stress when the load suddenly changes, and vibrations during the operation of the broken pump can cause forced vibrations and vibrations in the return piping 5,5'. Resonance is likely to occur, and to prevent fatigue failure due to this, #j
This requires a complicated process, requiring unreliable distribution routes and special piping fixing methods.

本発明は上記不具合の解消を目的として、ポンプのロー
ターに生ずるスラスト荷重を相殺する釣合機構からの゛
漏洩水をポンプの吸込側へ戻す流路を、内部ケーシング
ｅ（穿設してなる構成を特徴とするバーシル形多段ター
ボポンプを提供するものである。即ち、釣合機構からの
漏洩水をポンプの吸込側へ戻す流路が内部ケーシングに
穿設されるため戻し配管が不要となシ、戻し配管の疲労
破壊による事故の可能性が払拭され、煩雑な工程が省略
される効果を有する。In order to solve the above-mentioned problems, the present invention has a structure in which an internal casing (e) is provided with a flow path for returning "leakage water" from a balancing mechanism that offsets the thrust load generated on the pump's rotor to the suction side of the pump. The present invention provides a versil type multi-stage turbo pump characterized by the following: In other words, a flow path is provided in the internal casing to return leaked water from the balancing mechanism to the suction side of the pump, so no return piping is required. This has the effect of eliminating the possibility of accidents due to fatigue failure of the return piping and omitting complicated processes.

本発明を具体的に第３図と第４図に示す一実施例に基つ
き説明する。第８図は本発明を適用したバーシル形多段
ターボポンプの却断面図。The present invention will be specifically explained based on an embodiment shown in FIGS. 3 and 4. FIG. 8 is a cross-sectional view of a versil type multi-stage turbo pump to which the present invention is applied.

第４図は第３図の１〜’　−１１’断面図にして７図に
於て釣合機構゛２からの漏洩水をポンプの吸込側６へ戻
す流路７が内部ケーゾング３に穿設されている。このた
め、従来の戻［７配管は不璧となり設けられていない。FIG. 4 is a sectional view from 1 to '-11' in FIG. 3, and in FIG. has been done. For this reason, the conventional return piping is defective and is not provided.

内部ケーゾング３に従来から穿設されている長流路８は
、その出口の流れを乱さぬような対策を施したうえで適
当な位置に移動さｉｌているため、内部ケーゾング６の
外形寸法は従来と同一である。The long flow path 8 conventionally bored in the internal casing 3 has been moved to an appropriate position after taking measures not to disturb the flow at its outlet, so the external dimensions of the internal casing 6 are the same as before. is the same as

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来のバーシル形多段ターボポンプの縦断面図
、第２図は第１図の■−■断面図。 第８図は本発明を適用したバーシル形多段ターボポンプ
の縦断面図、第４図は第３図のＩｔ’　−ＩＶ断面図で
ある。 １・・・ローター、２・・・釣合機構、３・・・内部ケ
ーゾング、６・・・ポンプの吸込側、７・・・流路。FIG. 1 is a longitudinal cross-sectional view of a conventional versil type multi-stage turbo pump, and FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1. FIG. 8 is a longitudinal sectional view of a versil type multi-stage turbo pump to which the present invention is applied, and FIG. 4 is a sectional view taken along It'-IV in FIG. 3. DESCRIPTION OF SYMBOLS 1... Rotor, 2... Balancing mechanism, 3... Internal casing, 6... Suction side of pump, 7... Channel.

Claims (1)

【特許請求の範囲】[Claims] ポンプのローターに生ずるスラスト荷重を相殺する釣合
機構からの漏洩水をポンプの吸込側へ戻す流路を、内部
ケーシングに穿設してなることを特徴とするバーシル形
多段ターボポンプ。A versil type multi-stage turbo pump characterized by having a flow path bored in the internal casing for returning leaked water from a balancing mechanism to the suction side of the pump to offset the thrust load generated on the pump rotor.