JPH0440186U

JPH0440186U -

Info

Publication number: JPH0440186U
Application number: JP2737290U
Authority: JP
Priority date: 1990-03-17
Filing date: 1990-03-17
Publication date: 1992-04-06

Description

[Brief explanation of the drawing]

添付図面の第１は実施例の縦断正面図、第２図
は第１図の左端部の拡大正面図である。，，……第１〜３室、１……吸込ポート
、２……吐出口、３……通路、４……吸込口、５
……吐出口、６……通路、７……吸込口、８……
吐出ポート、９……ケーシング、１０……ハウジ
ングＲ、１１……ハウジングＬ、１２……駆動シ
ヤフト、１３，１４……ベアリング、１５……タ
イミングカバー、１５ａ……タイミングギヤ室、
１６……タイミングギヤ、１７……冷却水路、１
８……マグネツトカバー、１９……モータケース
、２０……キヤン、２１……従動ヨーク、２４…
…従動マグネツト、２５……ビルトインモータ、
２７……モータシヤフト、２９，３０……モータ
用ベアリング、３２……駆動マグネツト、３３…
…ビルトインモータ冷却水路、３４……モータカ
バー、３７……フアン、４１……グリス止めカラ
ー、４２……四フツ化エチレン系シール、４３…
…グリス溜り、４６……流出防止環、４９……オ
イル振切り装置。 The first of the accompanying drawings is a longitudinal sectional front view of the embodiment, and the second is an enlarged front view of the left end portion of FIG. ,,... 1st to 3rd chambers, 1... Suction port, 2... Discharge port, 3... Passage, 4... Suction port, 5
...Discharge port, 6...Passage, 7...Suction port, 8...
Discharge port, 9...Casing, 10...Housing R, 11...Housing L, 12...Drive shaft, 13, 14...Bearing, 15...Timing cover, 15a...Timing gear chamber,
16...Timing gear, 17...Cooling water channel, 1
8... Magnetic cover, 19... Motor case, 20... Can, 21... Driven yoke, 24...
...Driven magnet, 25...Built-in motor,
27... Motor shaft, 29, 30... Motor bearing, 32... Drive magnet, 33...
... Built-in motor cooling channel, 34 ... Motor cover, 37 ... Fan, 41 ... Grease stopper collar, 42 ... Tetrafluoroethylene seal, 43 ...
...Grease reservoir, 46...Outflow prevention ring, 49...Oil shaker device.

補正平２．４．２３実用新案登録請求の範囲を次のように補正する
。Amendment April 23, 2002 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】１多段真空ポンプにおいて、毒性ガスの大気漏
れ防止密封を保持するキヤンの内側に、ポンプ駆
動シヤフトに固着した従動マグネツトを設け、キ
ヤンの外側に、ビルトインモータのシヤフトに固
着した駆動マグネツトを前記従動マグネツトを包
囲させて設けてマグネツトカツプリングを構成す
ると共に、前記ビルトインモータのモータケース
の外周面と尾端面に冷却水路を隔ててモータカバ
ーを固着し、モータケースの内空尾端部に冷却さ
れた冷風気を該モータの回転フアンにより前記マ
グネツトカツプリング付近に送つて冷却を行う構
成としたことを特徴とする毒性ガス排出用まゆ型
二軸多段式真空ポンプ。２各ハウジングに設置してポンプ駆動シヤフト
を支持する各ベアリングのケーシング側にハウジ
ング側から突出するグリス止めカラーと前記駆動
シヤフトにほぼ接する四フツ化エチレン系シール
を設置し、各ベアリングと前記シールの間に各ベ
アリングからオーバーフローしたグリス又は外部
から補給するグリスの溜り部を設けたことを特徴
とする実用新案登録請求の範囲第１記載の毒性ガ
ス排出用まゆ型二軸多段式真空ポンプ。３ギヤオイルを充填したタイミングギヤ室を接
続したハウジングＬに、内周をポンプ駆動シヤフ
トにぼぼ接するオイル流出防止環を取付けその防
止環と前記ハウジングのベアリングとの間に前記
防止環により支持すると共に前記シヤフトにほぼ
接するオイルシールを設け、該オイルシールに対
応する前記のシヤフトに多条小突起のラビリンス
部を設け、ギヤオイルのベアリング方向への侵入
を防止することを特徴とする実用新案登録請求の
範囲１記載の毒性ガス排出用まゆ型二軸多段式真
空ポンプ。４多段真空ポンプの各部材にプラスチツクの被
覆処理を施したことを特徴とする実用新案登録請
求の範囲１〜３記載の毒性ガス排出用まゆ型二軸
多段式真空ポンプ。[Scope of Claim for Utility Model Registration] 1. In a multi-stage vacuum pump, a driven magnet fixed to the pump drive shaft is provided inside the can that maintains a seal to prevent leakage of toxic gas into the atmosphere, and a driven magnet fixed to the pump drive shaft is provided outside the can to the shaft of the built-in motor. A fixed drive magnet is provided to surround the driven magnet to form a magnetic coupling, and a motor cover is fixed to the outer circumferential surface and tail end surface of the motor case of the built-in motor with a cooling waterway in between. A cocoon-shaped two-shaft multistage vacuum pump for discharging toxic gases, characterized in that the cold air cooled at the inner tail end is sent to the vicinity of the magnetic coupling by a rotating fan of the motor for cooling. . 2. Install a grease stopper collar protruding from the housing side on the casing side of each bearing that is installed in each housing to support the pump drive shaft, and a tetrafluoroethylene seal that is almost in contact with the drive shaft. A cocoon-shaped two-shaft multi-stage vacuum pump for exhausting toxic gases according to claim 1, characterized in that a reservoir for grease overflowing from each bearing or grease to be replenished from the outside is provided between the pumps. 3. A timing gear chamber filled with gear oil is connected to the housing L, and an oil spill prevention ring whose inner periphery is almost in contact with the pump drive shaft is installed between the prevention ring and the bearing of the housing and is supported by the prevention ring. Claims for registration of a utility model, characterized in that an oil seal is provided that is substantially in contact with the shaft, and a labyrinth portion of multi-striped small protrusions is provided on the shaft corresponding to the oil seal to prevent gear oil from entering in the direction of the bearing. The cocoon-shaped two-shaft multistage vacuum pump for exhausting toxic gases according to item 1 . 4. The cocoon-shaped twin-shaft multistage vacuum pump for discharging toxic gases according to claims 1 to 3 , wherein each member of the multistage vacuum pump is coated with plastic.

Claims

[Scope of Claim for Utility Model Registration] 1. In a multi-stage vacuum pump with a built-in cooling water passage, a driven magnet fixed to the pump drive shaft is provided on the inside of the can that maintains a seal to prevent leakage of toxic gas into the atmosphere, and a driven magnet is provided on the outside of the can. A driving magnet fixed to the shaft of the built-in motor is provided to surround the driven magnet to constitute a magnetic coupling, and a motor cover is provided on the outer peripheral surface and the tail end surface of the motor case of the built-in motor with a cooling waterway in between. A cocoon type for discharging toxic gas, characterized in that the cocoon type for discharging toxic gases is configured such that the cooled air from the inner tail end of the motor case is sent to the vicinity of the magnetic coupler by a rotating fan of the motor for cooling. Two-shaft multi-stage vacuum pump. 2. In a multi-stage vacuum pump with an external cooling water passage, a driven magnet fixed to the pump drive shaft is installed inside the can that maintains a seal to prevent toxic gas from leaking into the atmosphere, and a driven magnet fixed to the shaft of the built-in motor is installed outside the can. A driving magnet is provided to surround the driven magnet to constitute a magnetic coupling, and a motor cover is fixed to the outer peripheral surface and tail end surface of the motor case of the built-in motor with a cooling waterway in between, and the inner space of the motor case is fixed. A cocoon-shaped two-shaft multi-stage vacuum pump for discharging toxic gas, characterized in that the cold air cooled at the tail end is sent to the vicinity of the magnetic coupling by a rotating fan of the motor for cooling. 3. Install a grease stopper collar protruding from the housing side on the casing side of each bearing that is installed in each housing to support the pump drive shaft, and a tetrafluoroethylene seal that is almost in contact with the drive shaft. A cocoon-shaped two-shaft multistage vacuum pump for exhausting toxic gases according to claims 1 and 2 of the utility model registration, characterized in that a reservoir for grease overflowing from each bearing or grease to be replenished from the outside is provided between the pumps. 4. An oil spill prevention ring whose inner periphery is almost in contact with the pump drive shaft is attached to the housing L to which the timing gear chamber filled with gear oil is connected, and is supported by the prevention ring between the prevention ring and the bearing of the housing, and Claims for registration of a utility model, characterized in that an oil seal is provided that is substantially in contact with the shaft, and a labyrinth portion of multi-striped small protrusions is provided on the shaft corresponding to the oil seal to prevent gear oil from entering in the direction of the bearing. The cocoon-shaped two-shaft multistage vacuum pump for exhausting toxic gases described in 1 and 2. 5. The cocoon-shaped two-shaft multi-stage vacuum pump for exhausting toxic gases according to claims 1 to 4 of the registered utility model, characterized in that each member of the multi-stage vacuum pump is coated with plastic.