JPS60182391A - Water sealing apparatus for submersible pump - Google Patents

Abstract

PURPOSE:To obtain a small-sized pump which does not necessitate an oil chamber by installing an oil seal between a motor chamber and a pump chamber and connecting an air passage which communicates to the motor chamber to an air feeding organ, thus increasing the water sealing function and preventing the intrusion of water into the motor chamber. CONSTITUTION:In the captioned water sealind apparatus of a submersible pump, an oil seal 1 is installed between a motor chamber 2 and a pump chamber 3, and an air passage 4 which communicates to the motor chamber 2 is connected to an air feeding organ (not shown in the figure). Air is introduced into the motor chamber 2 through the air passage 4 by the interlocking between the submersible pump and the air feeding organ, when the submersible pump is driven. Then, a high pressure is generated inside the motor chamber 2, and air sealing effect is developed, and the water sealing function of the oil seal 1 can be developed, and the intrusion of water from the pump chamber 3 to the motor chamber 2 is prevented during the drive of the submersible pump. With such constitution, a small-sized submersible pump which does not necessitate a mechanical seal and an oil chamber can be obtained at a low cost.

Description

【発明の詳細な説明】 （１）　目　的 本発明は、乾式モーターを使用した水中ポンプの封水装
置に関する。DETAILED DESCRIPTION OF THE INVENTION (1) Objective The present invention relates to a water sealing device for a submersible pump using a dry motor.

周知のようにメカニカルシールを有しない乾式モーター
は封水機能を有しないため、水中ポンプの駆動機関とし
て使用した場合にはポンプ室からモーター室内へ浸水を
生じることになる。他方、メカニカルシーμを備えた湿
式モーターは水中ポンプの駆動機関として多用されてい
るが高価であり、また、オイル室を必要とするため大形
化するという欠点がある。As is well known, a dry motor without a mechanical seal does not have a water sealing function, so when used as a driving engine for a submersible pump, water will leak from the pump chamber into the motor chamber. On the other hand, wet motors equipped with a mechanical sea μ are frequently used as driving engines for submersible pumps, but they are expensive and also have the disadvantage of being large in size because they require an oil chamber.

本発明の目的は、乾式モーターにおけるオイルシールの
封水機能を高めてモーター室への浸水を防止し、メカニ
カルシールおよびオイル室を必要としない小形の水中ポ
ンプを安価に提供せしめることにある。An object of the present invention is to improve the water-sealing function of an oil seal in a dry type motor to prevent water from entering the motor room, and to provide a small submersible pump that does not require a mechanical seal or an oil chamber at a low cost.

（２）構成 本発明に係る水中ポンプの耐水装置では、モーター室と
ポンプ室との間にオイルシールを装着し、モーター室内
へ通ずる通気路をエアー供給機関に接続した構成となっ
ている。(2) Structure The waterproof device for a submersible pump according to the present invention has a structure in which an oil seal is installed between the motor chamber and the pump chamber, and a ventilation path leading into the motor chamber is connected to an air supply engine.

実施例の内面において、１はモーター至２とポンプ室８
との間に装着されたオイルシー／ｌ／、　４はモーター
室２内へ朋する通気路であって、モーターケーシングの
側壁またはへラドカバーよシ導出せられ、エアーポンプ
、コンプレッサー等エアー供給機関（図示せず）と接続
する。そして水中ポンプとエアー供給機関とが連動する
ことによシ、水中ポンプ駆動時には通気路４を介してモ
ーター室２内へ夜気が導入されるようになっている。On the inner surface of the embodiment, 1 is the motor to 2 and the pump chamber 8.
4 is a ventilation path leading into the motor chamber 2, which is led out through the side wall of the motor casing or the head cover, and is connected to an air supply engine (such as an air pump or compressor). (not shown). By interlocking the submersible pump and the air supply engine, night air is introduced into the motor room 2 through the ventilation path 4 when the submersible pump is driven.

水機能が高められるので、水中ポンプ駆動中におけるポ
ンプ室８からモーター室２内への浸水が防止される。Since the water function is enhanced, water is prevented from entering the motor room 2 from the pump chamber 8 while the submersible pump is being driven.

（８）効　果 本発明によれば、エアー供給機関からの給気作用によっ
てオイルシ、−／Ｌ’ｌの封水機能が高められるので、
メカニカルシールを備えた高価な湿式モーターを用いる
必要がなくて安価に得られ、また、オイ／ｌ／￥を必要
としないため乾式モーターを用いて水中ポンプを小形に
構成し得るという利点がある。(8) Effects According to the present invention, the water sealing function of the oil tank -/L'l is enhanced by the air supply action from the air supply engine.
There is an advantage that there is no need to use an expensive wet type motor equipped with a mechanical seal and the submersible pump can be obtained at a low cost, and that a submersible pump can be made compact using a dry type motor since no oil/l/yen is required.

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

図面は本発明封水装置を備えた水中ポンプの要部縦断側
面図である。 ｌ・・・オイルシール、２・・・モーター室、３・・・
ポンプ室、４・・・通気路。 特許出願人　株式会社鶴見製作所 ３−The drawing is a longitudinal sectional side view of a main part of a submersible pump equipped with a water sealing device of the present invention. l...Oil seal, 2...Motor room, 3...
Pump room, 4... ventilation path. Patent applicant: Tsurumi Seisakusho Co., Ltd. 3-

Claims (1)

【特許請求の範囲】[Claims] モーター室（２）とポンプ室（３）との間にオイルシー
／ｌ／（１）を装置し、モーター室（２）内へ通ずる通
気路（優をエアー供給機関に接続してなる水中ポンプの
封水装置。A submersible pump in which an oil sea/l/(1) is installed between the motor room (2) and the pump room (3), and a ventilation passage (external) leading into the motor room (2) is connected to an air supply engine. water sealing device.