JPH0311193A - Vacuum pump - Google Patents
Vacuum pumpInfo
- Publication number
- JPH0311193A JPH0311193A JP14618589A JP14618589A JPH0311193A JP H0311193 A JPH0311193 A JP H0311193A JP 14618589 A JP14618589 A JP 14618589A JP 14618589 A JP14618589 A JP 14618589A JP H0311193 A JPH0311193 A JP H0311193A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- motor chamber
- drive shaft
- pump element
- 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.)
- Pending
Links
- 238000005192 partition Methods 0.000 claims abstract description 21
- 239000000314 lubricant Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 13
- 239000010687 lubricating oil Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
Landscapes
- Non-Positive Displacement Air Blowers (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、主として半導体製造分野におけるウェハーチ
ャンバーの真空引きなどに使用する真空ポンプに関する
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vacuum pump used mainly for evacuation of a wafer chamber in the field of semiconductor manufacturing.
(従来の技術)
従来、この種真空ポンプとして、例えば特開昭81−2
47893号公報で開示され、かつ、第4図に概略的に
示すように、ポンプハウジング(A)内に、外周に多数
の羽根を設けた複数のロータ(B)をもった回転体(C
)と、前記ロータ(B)を回転自由に支持するステータ
(D)とを組込んで渦流形ポンプ要素(E)を形成する
一方、隔壁(F)を挟んで前記ポンプハウジング(A)
に隣接してモータハウジング(G)を設け、このモータ
ハウジング(G)内に形成するモータ室(H)には、前
記回転体(C)を駆動する駆動モータ(J)を組込んで
、この駆動モータ(J)の駆動軸(K)を前記隔壁(F
)に設けた軸受(L)により軸受けしている。また、前
記ポンプハウジング(A)に吸気口(M)と排気口(N
)を、また前記ステータ(D)には円環状の気体流路(
0)を複数形成して、これら気体流路(0)を直列に接
続すると共に、前記各ロータ(B)の羽根を前記各気体
流路(0)内で回転させ、前記吸気口(M)側からの気
体を前記気体流路(0)内で順次圧縮して排気口(N)
から排気するようにし、前記吸気口(M)に接続する例
えば、半導体製造分野におけるウェハーチャンバー等の
閉鎖空間を高真空度にできるようにしている。(Prior art) Conventionally, as this type of vacuum pump, for example, Japanese Patent Application Laid-Open No. 81-2
As disclosed in Japanese Patent No. 47893 and schematically shown in FIG.
) and a stator (D) that rotatably supports the rotor (B) to form a whirlpool pump element (E), while the pump housing (A) is assembled with a partition wall (F) in between.
A motor housing (G) is provided adjacent to the motor housing (G), and a drive motor (J) for driving the rotating body (C) is installed in a motor chamber (H) formed within the motor housing (G). The drive shaft (K) of the drive motor (J) is connected to the partition wall (F).
) is supported by a bearing (L). In addition, the pump housing (A) has an intake port (M) and an exhaust port (N).
), and the stator (D) has an annular gas flow path (
0), and connect these gas flow paths (0) in series, and rotate the blades of each rotor (B) within each of the gas flow paths (0) to connect the air intake ports (M). The gas from the side is sequentially compressed in the gas flow path (0) and the gas is discharged through the exhaust port (N).
The closed space connected to the air inlet (M), such as a wafer chamber in the semiconductor manufacturing field, can be made to have a high degree of vacuum.
(発明が解決しようとする課題)
ところで、前記回転体(C)の回転により吸気[X’l
(M )側からの気体を前記気体流路(0)内で順次
圧縮して排気口(N)から排気することにより高真空度
を得るものであるから、大気圧に近いモータ室(H)に
比較して前記渦流形ポンプ要素(E)側は低圧になって
おり、前記駆動軸(K)を軸受する軸受(I7)に供給
する潤滑油が、前記渦流形ポンプ要素(E)側に流れ易
くなって、排気能力を低下させる問題があったのである
。(Problem to be Solved by the Invention) By the way, due to the rotation of the rotating body (C), the intake air [X'l
Since a high degree of vacuum is obtained by sequentially compressing the gas from the (M) side in the gas flow path (0) and exhausting it from the exhaust port (N), the motor chamber (H) is close to atmospheric pressure. The pressure on the vortex pump element (E) side is lower than that of the vortex pump element (E), and the lubricating oil supplied to the bearing (I7) that supports the drive shaft (K) is transferred to the vortex pump element (E) side. There was a problem that it became easy to flow and reduced the exhaust capacity.
本発明は、以上のような従来の問題に鑑みて発明したも
ので、その目的は、真空ポンプの運転中、モータ室の隔
壁近くに負圧部を形成し、軸受に供給した潤滑油が渦流
形ポンプ要素側へ逆流するのを阻止できるようにした真
空ポンプを提供することにある。The present invention was invented in view of the above-mentioned conventional problems.The purpose of the present invention is to form a negative pressure section near the partition wall of the motor chamber during operation of the vacuum pump, so that the lubricating oil supplied to the bearings flows into a vortex flow. It is an object of the present invention to provide a vacuum pump that can prevent backflow to the pump element side.
(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、吸気口(1)と
排気口(5)との間に、複数段のロータ(11a)・・
・を備えた渦流形ポンプ要素(8)を配設すると共に、
隔壁(6)を介して前記渦流形ポンプ要素(8)に隣接
するモータ室(3)を設け、前記隔壁(6)に設ける軸
受(15)で軸受する駆動軸(14)により前記ポンプ
要素(8)を回転させるようにした真空ポンプであって
、前記駆動軸(14)と隔壁(6)との間で、かつ、前
記軸受(15)への給油孔(23)に対し前記渦流形ポ
ンプ(8)側にシール部(I7)を設けると共に、前記
モータ室(3)内における117記駆動軸(14)に、
前記隔壁(6)に近接し、前記軸受(15)のモータ室
(3)側に負圧部を形成する羽根車(18)を設けたの
である。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a multi-stage rotor (11a) between an intake port (1) and an exhaust port (5).
A vortex pump element (8) is provided, and
A motor chamber (3) is provided adjacent to the vortex pump element (8) via a partition wall (6), and the pump element ( 8), wherein the vortex pump is arranged between the drive shaft (14) and the partition wall (6) and between the oil supply hole (23) to the bearing (15). A seal portion (I7) is provided on the (8) side, and the 117th drive shaft (14) in the motor chamber (3) is provided with a seal portion (I7).
An impeller (18) is provided close to the partition wall (6) and forms a negative pressure section on the motor chamber (3) side of the bearing (15).
(作用)
前記羽根車(18)が駆動軸(14)と共に高速で回転
して、前記モータ室(3)における前記隔壁(6)七前
記羽根車(18)との間が高速回転する前記羽根車(1
8)のエゼクタ効果により負圧部になり、軸受(15)
に供給した潤滑油がモータ室(3)側に吸い出されて、
潤滑油の前記ポンプ要素(8)側への逆流が阻止される
のであり、潤滑油の前記渦流形ポンプ要素(8)への逆
流による能力低下を確実に防止できるのである。(Function) The impeller (18) rotates at high speed together with the drive shaft (14), and the impeller rotates at high speed between the partition wall (6) and the impeller (18) in the motor chamber (3). Car (1
8) becomes a negative pressure section due to the ejector effect, and the bearing (15)
The lubricating oil supplied to the motor chamber (3) is sucked out to the motor chamber (3) side.
This prevents the lubricating oil from flowing back toward the pump element (8), thereby reliably preventing a decrease in performance due to the backflow of the lubricating oil toward the swirl pump element (8).
(実施例)
第1図は本発明にかかる真空ポンプの縦断面を示したも
のであって、上部に吸気口(1)を備えたボンプケーン
ング(2)と、内部にモータ室(3)を形成するモータ
ケーシング(4)との間に、側部に排気口(5)を設け
た隔壁(6)をポル) (2a)及び(4a)の締込み
により挟着し、前記ポンプハウング(2)内には溝形ポ
ンプ要素(7)と渦流形ポンプ要素(8)とを、該渦流
形ポンプ要素(8)が溝形ポンプ要素(7)より排気側
となるように配置している。そして前記溝形ポンプ要素
(7)は2枚の固定円板(7a)・・・と3枚の回転円
板(7b)・・・とから構成している。また、前記渦流
形ポンプ要素(8)は、4つの円形状の固定板(10a
)・・・からなるステータ(10)と、3つのロータ(
11a)・・・をもった回転体(11)とから構成され
、これらロータ(11a)・・・は排気口(5)に近い
程その直径を小さくして、各固定板(10a)・・・間
において各ロータ(11a)・・・が回転できるように
している。(Example) Fig. 1 shows a longitudinal section of a vacuum pump according to the present invention, in which a pump caning (2) with an intake port (1) at the top and a motor chamber (3) formed inside. A bulkhead (6) with an exhaust port (5) on the side is clamped between the motor casing (4) and the pump housing (2) by tightening the poles (2a) and (4a). A groove-type pump element (7) and a vortex-type pump element (8) are arranged such that the vortex-type pump element (8) is on the exhaust side of the groove-type pump element (7). The groove-shaped pump element (7) is composed of two fixed discs (7a) and three rotating discs (7b). The vortex pump element (8) also includes four circular fixed plates (10a
)... A stator (10) consisting of three rotors (
The diameter of these rotors (11a) decreases as it approaches the exhaust port (5), and each fixed plate (10a)... - Each rotor (11a)... can rotate between them.
また、前記モータケーシング(4)のそ−タ室(3)に
はモータ(13)を内装しており、このモータ(13)
の駆動軸(14)は前記隔壁(6)を貫通して、前記ポ
ンプケーシング(2)内に突入しており、その先端部に
はボルト(14a)を介して前記回転体(11)を固定
すると共に、この回転体(11)の先端部には3枚の前
記回転円[(7b)・・・をポル) (7c)で固定し
、前記駆動軸(14)の駆動により回転体(11)及び
回転円板(7b)を回転するようにしている。尚、前記
モータケーシング(4)の下部内方には下部軸受(41
)を設けて前記駆動軸(14)を上下2箇所で軸受し、
前記駆動軸(14)が安定して回転できるようにしてい
る。Further, a motor (13) is installed inside the motor chamber (3) of the motor casing (4), and this motor (13)
The drive shaft (14) penetrates the partition wall (6) and protrudes into the pump casing (2), and the rotating body (11) is fixed to the tip of the drive shaft (14) via a bolt (14a). At the same time, the three rotating circles [(7b)... are fixed to the tip of the rotating body (11) (7c), and the rotating body (11) is driven by the drive shaft (14). ) and a rotating disk (7b) are rotated. In addition, a lower bearing (41) is located inside the lower part of the motor casing (4).
) to bear the drive shaft (14) at two locations, upper and lower,
This allows the drive shaft (14) to rotate stably.
そして、前記ステータ(工0)は、4枚の固定板(10
a)・・・を積層して構成し、各固定板(10a)の半
径方向途中で、かつ、各固定板(10a)の間には3つ
の環状通路(9)・・・を形成し、これら環状通路(9
)・・・内で、各a−タ(lfa)・・・の外周縁部に
形成した多数の羽根(12)が回動するようにしている
。又これ等環状通路(9)・・・は互いに連通しており
、前記IJI気口(5)に近い環状通路(9)はどその
直径を小さ(し、前記各ロータ(11a)・・・の直径
に対応させて、前記溝形ポンプ要素(7)を経て環状通
路(9)に流入する気体を順次排気口(5)側に位置す
る環状通路(9)に流入させ、排気口(5)に近い環状
通路(9)はど圧縮率を小さくし、気体圧縮による発熱
を少なくなるようにしている。The stator (work 0) has four fixed plates (10
a)... are laminated to form three annular passages (9)... in the middle of each fixing plate (10a) in the radial direction and between each fixing plate (10a), These annular passages (9
)..., a large number of blades (12) formed on the outer peripheral edge of each a-ta (lfa)... are configured to rotate. These annular passages (9) communicate with each other, and the annular passage (9) near the IJI air port (5) has a reduced diameter (and each of the rotors (11a)... The gas flowing into the annular passage (9) via the groove-shaped pump element (7) is made to sequentially flow into the annular passage (9) located on the exhaust port (5) side in accordance with the diameter of the exhaust port (5). ) The annular passageway (9) close to the air compressor has a low compression ratio to reduce heat generation due to gas compression.
また、この環状流路(9)は、第3図に示すように、流
入口(9a)から流出口(9b)に向けて暫時その断面
積を小さくしており、又、該流路(9)内に、同じく流
入口(9a)から流出口(9b)にかけて暫時断面積を
小さくする円環コア(9c)を介装して、該円環コア(
9C)と羽根(12)とを接近配置し、流入口(9a)
から流出口(9b)にかけて流通させる気体分子を、ロ
ータ(11)の回転により円環コア(9c)周りに適数
回ら旋運動させて、その回数だけ羽根(12)に気体分
子を横断させ、その都度気体分子が羽根(12)側から
運動エネルギーを受は取れるようにし、スムーズな排気
が行えるようにしている。この円環コア(9c)は、そ
の周方向−部に、第3図に示したように平坦部(9d)
を設けて、この平坦部(9d)を前記ステータ(lO)
に設ける仕切り段g(10b)にピン(9e)を介して
固定する一方、前記平坦部(9d)に対向する中間部を
支持ピン(9f)を介して前記ステータ(10)に支持
することにより、環状通路(9)内に宙吊り状に支持し
ている。Further, as shown in FIG. 3, the annular flow path (9) has a cross-sectional area that is temporarily reduced from the inlet (9a) to the outlet (9b). ) is interposed with an annular core (9c) whose cross-sectional area is temporarily reduced from the inlet (9a) to the outlet (9b).
9C) and the blade (12) are arranged close to each other, and the inlet (9a)
The gas molecules flowing from the to the outlet (9b) are caused to spiral around the annular core (9c) an appropriate number of times by the rotation of the rotor (11), and the gas molecules are caused to cross the blade (12) the number of times, Each time, the gas molecules receive and receive kinetic energy from the blade (12) side, so that smooth exhaust can be performed. This annular core (9c) has a flat portion (9d) in its circumferential direction as shown in FIG.
is provided, and this flat part (9d) is connected to the stator (lO).
By fixing it to the partition step g (10b) provided in the stator (10b) via a pin (9e), and supporting the intermediate part facing the flat part (9d) to the stator (10) via a support pin (9f). , is supported in a suspended manner within the annular passageway (9).
また、隔壁(8)の中央部には軸受(15)を設けて前
記駆動軸(14)を軸受すると共に、前記隔壁(6)の
側方からこの軸受(15)に給油する給油路(16)を
穿孔している。Further, a bearing (15) is provided in the center of the partition wall (8) to support the drive shaft (14), and an oil supply path (16) that supplies oil to the bearing (15) from the side of the partition wall (6). ) is perforated.
このようにして、前記給油路(16)から後記する給油
孔(23)を介して潤滑油を前記軸受(15)に給油し
ながら、前記モータ(13)により駆動軸(14)を介
して溝形ポンプ要素(7)と渦流形ポンプ要素(8)と
を回転させ、前記排気口(5)から気体を排気すること
により、前記吸気口(1)に接続した例えば半導体製造
分野におけるウェハーチャンバー等の閉鎖空間(図示し
ない)を高真空度にできるようにしている。In this way, while lubricating oil is supplied from the oil supply path (16) to the bearing (15) through the oil supply hole (23), which will be described later, the motor (13) moves the lubricant into the groove through the drive shaft (14). By rotating the pump element (7) and the vortex pump element (8) and exhausting gas from the exhaust port (5), a wafer chamber, etc., connected to the intake port (1), for example in the semiconductor manufacturing field, etc. This allows a closed space (not shown) to be brought to a high degree of vacuum.
しかして本発明は、第2図に示したごとく、前記駆動軸
(14)と隔壁(6)との間で、かつ、前記軸受(15
)への給油孔(23)に対し前記m流形ポンプ(8)側
にシール部(17)を設けると共に、前記モータ室(3
)内における前記駆動軸(14)に、前記隔壁(6)に
近接し、前記軸受(15)のモータ室(3)側に負圧部
を形成する羽根車(18)を設けたのである。Therefore, as shown in FIG. 2, the present invention provides for a
) is provided with a seal portion (17) on the m-flow type pump (8) side with respect to the oil supply hole (23) to the motor chamber (3).
) is provided with an impeller (18) close to the partition wall (6) and forming a negative pressure section on the motor chamber (3) side of the bearing (15).
具体的には、前記隔壁(6)の中央部に嵌合孔(19)
を設けて、との嵌合孔(19)に、筒部(20)をもっ
た軸受支持体(22)を嵌合し、前記駆動軸(14)を
軸受(15)を介して前記軸受支持体(22)に回転自
由に支持すると共に、前記筒部(20)の内周面で、前
記軸受(15)を支持する支持部位に対し軸方向−側、
即ち前記ポンプ要素(8)側には複数の環状溝(20a
)を形成し、かつ、前記駆動軸(14)には、スリンガ
(26)をもった筒体(14a)を取付けて、前記環状
溝(20a)と筒体(14a)とによりシール部(17
)を形成するのである。また、前記スリンガ(26)は
、前記軸受支持体(22)に設ける環状室(21)内に
配設しており、この環状室(21)の半径方向外方には
、前記モータ室(3)に開口する排油孔(24)を設け
ている。そして前記モータ室(3)内における駆動軸(
14)に、前記軸受支持体(22)とは〈同程度の外径
をもつ羽根車(18)を設けて、該羽根車(18)と前
記軸受支持体(22)即ち前記隔壁(6)との間隔を、
羽根車(18)の高速回転によりエゼクタ効果が得られ
る程度に狭くして、羽根車(18)と前記軸受(15)
及び軸受支持体(22)との間に負圧部(25)が形成
できるごとくするのである。尚、前記軸受支持体(22
)には、前記給油路(16)に連通ずる軸受給油孔(2
3)を設け、この給油孔(23)を、前記環状室(21
)内で、前記スリンガ(26)に対しモータ室(3)側
、つまり軸受(15)側に開口させている。Specifically, a fitting hole (19) is provided in the center of the partition wall (6).
A bearing support (22) having a cylindrical portion (20) is fitted into the fitting hole (19), and the drive shaft (14) is connected to the bearing support via the bearing (15). a support portion that is rotatably supported on the body (22) and that supports the bearing (15) on the inner circumferential surface of the cylindrical portion (20) on the negative side in the axial direction;
That is, a plurality of annular grooves (20a) are formed on the side of the pump element (8).
), and a cylindrical body (14a) having a slinger (26) is attached to the drive shaft (14), and a seal portion (17) is formed by the annular groove (20a) and the cylindrical body (14a).
). Further, the slinger (26) is disposed within an annular chamber (21) provided in the bearing support (22), and the motor chamber (3) is disposed radially outward of the annular chamber (21). ) is provided with an oil drain hole (24) that opens into the hole. And the drive shaft (
14), the bearing support (22) is an impeller (18) having the same outer diameter, and the impeller (18) and the bearing support (22), that is, the partition wall (6). The distance between
The impeller (18) and the bearing (15) are narrowed to the extent that an ejector effect can be obtained by the high speed rotation of the impeller (18).
A negative pressure section (25) is formed between the bearing support body (22) and the bearing support body (22). In addition, the bearing support body (22
) has a bearing oil supply hole (2) communicating with the oil supply passage (16).
3), and this oil supply hole (23) is connected to the annular chamber (21).
) is opened on the motor chamber (3) side, that is, on the bearing (15) side with respect to the slinger (26).
以」二の構成において前記駆動軸(14)を駆動して前
記溝形ポンプ要素(7)と渦流形ポンプ要素(8)を回
転させると、吸気口(1)から排気口(5)にかけて連
続的に圧縮が行われると共に、排気口(5)から排気が
行われて、吸気口(1)に接続する閉鎖空間側は高真空
度になるのである。このとき前記駆動軸(14)と−緒
に前記羽根車(18)も高速回転して、軸受(15)の
モータ室(3)側に負圧部(25)が形成されるから、
給油路(16)から前記給油孔(23)を介して軸受(
15)に供給される潤滑油は、前記シール部(17)か
ら前記渦流形ポンプ(8)側に逆流するのを阻止される
と共に、前記軸受(15)のモータ室(3)側に吸い出
される。In the second configuration, when the drive shaft (14) is driven to rotate the groove type pump element (7) and the vortex type pump element (8), a continuous flow is generated from the intake port (1) to the exhaust port (5). At the same time, compression is performed and exhaust is performed from the exhaust port (5), and the closed space side connected to the intake port (1) becomes high vacuum. At this time, the impeller (18) also rotates at high speed together with the drive shaft (14), and a negative pressure section (25) is formed on the motor chamber (3) side of the bearing (15).
The bearing (
The lubricating oil supplied to the bearing (15) is prevented from flowing backward from the seal portion (17) to the swirl pump (8) side, and is sucked out to the motor chamber (3) side of the bearing (15). It will be done.
又、前記排油孔(24)のモータ室(3)側聞口部付近
もまた負圧になっているから、前記スリンガ(26)に
よりはね飛ばされた潤滑油は、前記排油孔(24)を介
してモータ室(3)側に(非出されるのである。In addition, since the vicinity of the motor chamber (3) side port of the oil drain hole (24) is also under negative pressure, the lubricating oil splashed by the slinger (26) flows into the oil drain hole (24). 24) to the motor room (3) side.
尚、第1図において、(51)はパージガスの導入通路
、(8a)は渦流ポンプ要素(8)の温度を下げる冷却
水の通路である。In FIG. 1, (51) is a purge gas introduction passage, and (8a) is a cooling water passage for lowering the temperature of the vortex pump element (8).
(発明の効果)
本発明によれば、前記駆動軸(14)と隔壁(6)との
間で、かつ、前記軸受(15)への給油孔(23)に対
し前記渦流形ポンプ要素(8)側にシール部(17)を
設けると共に、前記モータ室(3)内における前記駆動
軸(14)に、前記隔壁(6)に近接し、前記軸受(1
5)のモータ室(3)側に負圧部を形成する羽根車(1
8)を設けたから、前記羽根1IL(18)が駆動軸(
14)と共に高速で回転して、前記モータ室(3)にお
ける前記隔壁(6)と前記羽根車(18)との間はエゼ
クタ効果により負圧部になり、軸受(15)に供給した
潤滑油がモータ室(3)側に吸い出されて、潤滑油の前
記ポンプ要素(8)側への逆流が阻止されるのであり、
潤滑油の1iiJ記渦流形ポンプ要素(8)への逆流に
よる能力低下を確実に防止できるのである。(Effects of the Invention) According to the present invention, the vortex pump element (8 ) side, and a seal part (17) is provided on the drive shaft (14) in the motor chamber (3), close to the partition wall (6), and a seal part (17) is provided on the bearing (1) side.
5), the impeller (1) forms a negative pressure section on the motor chamber (3) side.
8), the blade 1IL (18) is connected to the drive shaft (
14), the space between the partition wall (6) and the impeller (18) in the motor chamber (3) becomes a negative pressure section due to the ejector effect, and the lubricating oil supplied to the bearing (15) is sucked out to the motor chamber (3) side, and the backflow of lubricating oil to the pump element (8) side is prevented.
This makes it possible to reliably prevent a decrease in performance due to backflow of lubricating oil to the vortex type pump element (8).
第1図は本発明にかかる真空ポンプの断面図、第2図は
要部の拡大断面図、第3図はロータの拡大平面図、第4
図は従来例の真空ポンプの断面図である。
(1)・・・・・・・・・・・・・・・・・・・・・吸
気口(3)・・・・・・・・・・・・・・・・・・・・
・モータ室(5)・・・・・・・・・・・・・・・・・
・・・・排気口(6)・・・・・・・・・・・・・・・
・・・・・・隔壁(8)・・・・・・・・・・・・・・
・・・・・・・渦流ポンプ要素(11a)・・・・・・
・・・・・・・・・ロータ(14)・・・・・・・・・
・・・・・・・・・駆動軸(15)・・・・・・・・・
・・・・・・・・・軸受(17)・・・・・・・・・・
・・・・・・・・/−ル部(18)・・・・・・・・・
・・・・・・・・・羽根車(23)・・・・・・・・・
・・・・・・・・・給油孔+44FIG. 1 is a sectional view of a vacuum pump according to the present invention, FIG. 2 is an enlarged sectional view of the main parts, FIG. 3 is an enlarged plan view of the rotor, and FIG.
The figure is a sectional view of a conventional vacuum pump. (1)・・・・・・・・・・・・・・・・・・Intake port (3)・・・・・・・・・・・・・・・・・・・・・
・Motor room (5)・・・・・・・・・・・・・・・・・・
・・・Exhaust port (6)・・・・・・・・・・・・・・・
・・・・・・Bulkhead (8)・・・・・・・・・・・・・・・
...... Vortex pump element (11a) ...
・・・・・・・・・Rotor (14)・・・・・・・・・
・・・・・・・・・Drive shaft (15)・・・・・・・・・
・・・・・・・・・Bearing (17)・・・・・・・・・・
・・・・・・・・・/-Le part (18)・・・・・・・・・
・・・・・・・・・Impeller (23)・・・・・・・・・
......Oil supply hole +44
Claims (1)
ータ(11a)・・・を備えた渦流形ポンプ要素(8)
を配設すると共に、隔壁(6)を介して前記渦流形ポン
プ要素(8)に隣接するモータ室(3)を設け、前記隔
壁(6)に設ける軸受(15)で軸受する駆動軸(14
)により前記ポンプ要素(8)を回転させるようにした
真空ポンプであって、前記駆動軸(14)と隔壁(6)
との間で、かつ、前記軸受(15)への給油孔(23)
に対し前記渦流形ポンプ要素(8)側にシール部(17
)を設けると共に、前記モータ室(3)内における前記
駆動輪(14)に、前記隔壁(6)に近接し、前記軸受
(15)のモータ室(3)側に負圧部を形成する羽根車
(18)を設けたことを特徴とする真空ポンプ。1) A vortex pump element (8) equipped with a multi-stage rotor (11a) between the intake port (1) and the exhaust port (5).
At the same time, a motor chamber (3) is provided adjacent to the swirl pump element (8) via a partition wall (6), and a drive shaft (14) is supported by a bearing (15) provided on the partition wall (6).
) to rotate the pump element (8), the drive shaft (14) and the partition wall (6)
and an oil supply hole (23) to the bearing (15).
On the other hand, there is a seal portion (17) on the vortex pump element (8) side.
), and a vane is provided on the driving wheel (14) in the motor chamber (3), close to the partition wall (6), and forming a negative pressure section on the motor chamber (3) side of the bearing (15). A vacuum pump characterized by being provided with a wheel (18).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14618589A JPH0311193A (en) | 1989-06-08 | 1989-06-08 | Vacuum pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14618589A JPH0311193A (en) | 1989-06-08 | 1989-06-08 | Vacuum pump |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0311193A true JPH0311193A (en) | 1991-01-18 |
Family
ID=15402061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14618589A Pending JPH0311193A (en) | 1989-06-08 | 1989-06-08 | Vacuum pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0311193A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1256721A2 (en) | 2001-05-08 | 2002-11-13 | Kabushiki Kaisha Toyota Jidoshokki | Sealing for a rotary vacuum pump |
EP1256720A2 (en) | 2001-05-08 | 2002-11-13 | Kabushiki Kaisha Toyota Jidoshokki | Sealing for a rotary vacuum pump |
EP1273801A2 (en) | 2001-07-05 | 2003-01-08 | Kabushiki Kaisha Toyota Jidoshokki | Sealing for vacuum pump |
EP1304484A2 (en) | 2001-10-17 | 2003-04-23 | Kabushiki Kaisha Toyota Jidoshokki | Vacuum pump |
US6688863B2 (en) | 2001-06-29 | 2004-02-10 | Kabushiki Kaisha Toyota Jidoshokki | Oil leak prevention structure of vacuum pump |
-
1989
- 1989-06-08 JP JP14618589A patent/JPH0311193A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1256721A2 (en) | 2001-05-08 | 2002-11-13 | Kabushiki Kaisha Toyota Jidoshokki | Sealing for a rotary vacuum pump |
EP1256720A2 (en) | 2001-05-08 | 2002-11-13 | Kabushiki Kaisha Toyota Jidoshokki | Sealing for a rotary vacuum pump |
US6659227B2 (en) | 2001-05-08 | 2003-12-09 | Kabushiki Kaisha Toyota Jidoshokki | Oil leak prevention structure for vacuum pump |
US6688863B2 (en) | 2001-06-29 | 2004-02-10 | Kabushiki Kaisha Toyota Jidoshokki | Oil leak prevention structure of vacuum pump |
EP1273801A2 (en) | 2001-07-05 | 2003-01-08 | Kabushiki Kaisha Toyota Jidoshokki | Sealing for vacuum pump |
US6688864B2 (en) | 2001-07-05 | 2004-02-10 | Kabushiki Kaisha Toyota Jidoshokki | Oil leak prevention structure of vacuum pump |
EP1304484A2 (en) | 2001-10-17 | 2003-04-23 | Kabushiki Kaisha Toyota Jidoshokki | Vacuum pump |
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