JPH0444867Y2 - - Google Patents
Info
- Publication number
- JPH0444867Y2 JPH0444867Y2 JP20300386U JP20300386U JPH0444867Y2 JP H0444867 Y2 JPH0444867 Y2 JP H0444867Y2 JP 20300386 U JP20300386 U JP 20300386U JP 20300386 U JP20300386 U JP 20300386U JP H0444867 Y2 JPH0444867 Y2 JP H0444867Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- pump
- stage
- feed pump
- tank case
- 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.)
- Expired
Links
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は各種の真空機器分野で利用される油回
転真空ポンプに関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an oil rotary vacuum pump used in various vacuum equipment fields.
［従来の技術］
油回転真空ポンプは、油槽ケースの内部に所定
量の油を貯溜しておき、その油面下に配したポン
プ本体のポンプ室に該貯溜油を少量づつ供給して
循環するようにしている。すなわち、この種のポ
ンプでは、固定子（ポンプフレーム）内に回転子
を配置して形成されるポンプ室に、作動中、油槽
ケース内の油を連続的に供給することにより、必
要なオイルバラスト、潤滑並びにシールの各効果
を維持することができるものである。そして、そ
のポンプ室内に導入された油は、排気と共にポン
プ本体の排気口から順次放出されて油槽ケース内
に戻される。[Prior Art] An oil rotary vacuum pump stores a predetermined amount of oil inside an oil tank case, and circulates the stored oil by supplying it little by little to the pump chamber of the pump body located below the oil surface. That's what I do. In other words, in this type of pump, the necessary oil ballast is achieved by continuously supplying the oil in the oil tank case to the pump chamber formed by arranging the rotor within the stator (pump frame) during operation. , lubrication and sealing effects can be maintained. The oil introduced into the pump chamber is sequentially discharged from the exhaust port of the pump body together with the exhaust gas and returned into the oil tank case.
［考案が解決しようとする問題点］
このため、一般に油回転真空ポンプでは、ポン
プ本体の側面に、その油槽ケース内の油を該ポン
プ本体のポンプ室に送り込むための油送りポンプ
を設けるのが普通となつている。しかし、従来で
は、この油送りポンプをモータ側に位置させてそ
のポンプ駆動軸のまわりに付設する構造となつて
いるため、組立に不便を来たしている。また、油
送りポンプでポンプ本体のポンプ室に油を供給す
る場合、油槽ケース内の汚れた油や異物が直接ポ
ンプ室に入ると焼付事故等のトラブルを発生する
ため、異物等の混入防止手段を確立することが肝
要である。さらに又、この種ポンプの運転を停止
した場合、真空のままのポンプ室に油槽ケース内
から油送りポンプの油通路を通して大量の油が侵
入して、後の運転開始時のポンプ作動に支障を来
たすことがあり、かかる不具合への対策を講じる
ことも重要な課題である。[Problems to be solved by the invention] For this reason, in oil rotary vacuum pumps, it is generally recommended to provide an oil feed pump on the side of the pump body to feed the oil in the oil tank case to the pump chamber of the pump body. It has become normal. However, in the past, this oil feed pump was located on the motor side and attached around the pump drive shaft, which caused inconvenience in assembly. In addition, when supplying oil to the pump chamber of the pump body with an oil feed pump, if dirty oil or foreign matter in the oil tank case directly enters the pump chamber, problems such as seizure may occur, so measures must be taken to prevent foreign matter from entering. It is essential to establish the Furthermore, when the operation of this type of pump is stopped, a large amount of oil enters the vacuum pump chamber from inside the oil tank case through the oil passage of the oil feed pump, which may interfere with pump operation when the pump starts operating later. It is also an important issue to take measures against such problems.
本考案は、上述した問題点や技術的課題を克服
し得るように改良工夫した油回転真空ポンプを提
供するものである。 The present invention provides an oil rotary vacuum pump that has been improved and devised to overcome the above-mentioned problems and technical issues.
［問題点を解決するための手段］
本考案は、このような目的を達成するために、
ポンプ本体の反モータ側でその駆動軸端に油送り
ポンプを設け、油槽ケース内の油面下にフイルタ
ーを介して該油送りポンプの吸込口を開口させる
とともに、この油送りポンプから前記ポンプ本体
に油を送り込む油通路に、ポンプ停止時での油の
侵入を阻止する弁機構を設けたことを特徴とする
油回転真空ポンプを提供するものである。[Means for solving the problem] In order to achieve the above purpose, the present invention
An oil feed pump is provided at the end of the drive shaft on the side opposite to the motor of the pump body, and the suction port of the oil feed pump is opened below the oil level in the oil tank case through a filter, and the oil feed pump is connected to the pump body. To provide an oil rotary vacuum pump characterized in that an oil passage through which oil is sent is provided with a valve mechanism that prevents oil from entering when the pump is stopped.
［作用］
このような構成の油回転真空ポンプであると、
そのポンプ本体に付設する油送りポンプを該ポン
プ本体から反モータ側に延出される駆動軸端に配
置するようにしているので、油送りポンプはポン
プ本体をベースボデイに取着、組立した後、これ
をその駆動軸端に独立して取付けることができ、
モータ側に取付ける従来品に比較すると組立作業
が非常に簡便に行なえるものとなる。そして、こ
のものでは、その油送りポンプの吸込口にはフイ
ルターを介して油槽ケース内の油面下から油が吸
引されるから、油槽ケース内の異物や汚染油を汲
取ることがなく、またポンプ停止時にはその油通
路に介設した弁機構が作動してポンプ室内に油が
侵入するのを有効に阻止する。[Function] If the oil rotary vacuum pump has this configuration,
Since the oil feed pump attached to the pump body is arranged at the end of the drive shaft extending from the pump body toward the side opposite to the motor, the oil feed pump can be installed after the pump body is attached to the base body and assembled. This can be installed independently on the end of the drive shaft,
Compared to conventional products that are attached to the motor side, assembly work is much easier. In addition, since oil is sucked from below the oil level in the oil tank case through the filter to the suction port of the oil feed pump, there is no need to pump up foreign objects or contaminated oil in the oil tank case. When the pump is stopped, a valve mechanism provided in the oil passage operates to effectively prevent oil from entering the pump chamber.
［実施例］
以下、本考案の一実施例を図面を参照して説明
する。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図は、本考案に係る２連形の油回転真空ポ
ンプを示すもので、ベースボデイ１に、第１段の
ポンプ本体と、これより容積の小さな第２段の
ポンプ本体とを直列二段に連設して構成されて
いる。ここに各段のポンプ本体，は、その固
定子S1，S2を形成する各ポンプフレームに、軸心
から二枚のベーンを逆向きで凸没自在に突出する
回転子R1，R2をその偏心位置で摺接させてなり、
これら回転子R1，R2の駆動回転下にベーンで仕
切られたポンプ室の容積を増減させて周知のポン
プ機能を営ませるようにしたものである。そし
て、図示しないポンプの吸気口から吸気し、これ
を第１段のポンプ本体で圧縮した後、さらに第
２段のポンプ本体で圧縮してから排気する。 Fig. 1 shows a two-stage oil rotary vacuum pump according to the present invention, in which a first stage pump body and a second stage pump body having a smaller volume are connected in series to a base body 1. It is arranged in series. Here, the pump body of each stage has rotors R 1 and R 2 which have two vanes retractably protruding in opposite directions from the shaft center on each pump frame forming the stators S 1 and S 2 . are brought into sliding contact at that eccentric position,
Under the driving rotation of these rotors R 1 and R 2 , the volume of a pump chamber partitioned by vanes is increased or decreased to perform a well-known pump function. Then, air is taken in from an intake port of a pump (not shown), compressed by the first stage pump body, further compressed by the second stage pump body, and then exhausted.
この２連形の油回転真空ポンプにおいて、その
第１段のポンプ本体を、図示しない吸気系路を
含めて、これをベースボデイ１の内部に設けるよ
うにしている。すなわち、ベースボデイ１を第１
段ポンプ本体のポンプフレームに兼用し、その
内部に形成した固定子S1の空間に前記ベーン付き
回転子R1を配置している。そして、この第１段
ポンプ本体を内有するベースボデイ１の前方開
口端を前端２で閉塞するとともに、この前壁２を
貫通して第１段ポンプ本体に連結される駆動軸
３を挿通し、さらにこの駆動軸３の導入端３ａに
クラツチ機構４を設けて図外のモータと断接切換
自在に連結している。なお、ベースボデイ１の前
端面にはカバー５を蓋着し、また駆動軸３の導入
端３ａにはフアン６を設けて、前カバー５内でベ
ースボデイ１の前壁を直接空冷するようにしてい
る。 In this dual type oil rotary vacuum pump, the first stage pump main body, including an intake system path (not shown), is provided inside the base body 1. In other words, base body 1 is
The vaned rotor R 1 is arranged in a space of a stator S 1 which also serves as a pump frame of the stage pump main body and is formed inside the stator S 1 . Then, the front opening end of the base body 1 containing the first stage pump main body is closed with the front end 2, and the drive shaft 3 connected to the first stage pump main body is inserted through the front wall 2. Further, a clutch mechanism 4 is provided at the introduction end 3a of the drive shaft 3, and is connected to a motor (not shown) so as to be able to be connected or disconnected. A cover 5 is attached to the front end surface of the base body 1, and a fan 6 is provided at the introduction end 3a of the drive shaft 3, so that the front wall of the base body 1 is directly air-cooled within the front cover 5. ing.
一方、前記モータと反対側に延出される駆動軸
３のまわりには、まず固定子S1の後方開口端を閉
塞する中間壁７を連接している。この中間壁７に
は、その内部に第１段ポンプ本体で圧縮した排
気を第２段ポンプ本体に導通する排気連絡通路
８が設けられる。そして、この中間壁７を介して
ベースボデイ１の後端側に、駆動軸３により第１
段ポンプ本体と同期して回転駆動される第２段
ポンプ本体を連接している。この第２段ポンプ
本体はその固定子S2の両側の開口端のうち、前
方を前記中間壁７で閉塞している一方、後方はそ
の端面に後壁９を連接して閉塞している。そし
て、この後壁９に前記駆動軸３の延出端３ｂを貫
通させ、その後端軸まわりに、該後壁９と更にそ
の後端面に接合される端板１０との間の空間で油
送りポンプを設置するようにしている。この油
送りポンプは、端板（油送りポンプ後壁）１０
に開通させた吸込口１１から汲取つた油を、第２
段ポンプ本体から第１段ポンプ本体の各ポン
プ室内に順次供給する役目を担うものであり、そ
の構成および付属機構は後述の通りである。 On the other hand, an intermediate wall 7 that closes the rear open end of the stator S 1 is connected around the drive shaft 3 extending on the opposite side from the motor. This intermediate wall 7 is provided therein with an exhaust communication passage 8 that conducts the exhaust gas compressed by the first stage pump body to the second stage pump body. Then, the drive shaft 3 connects the first
A second stage pump body is connected to the stage pump body and is rotated in synchronization with the stage pump body. Of the open ends on both sides of the stator S 2 of the second stage pump main body, the front is closed by the intermediate wall 7, while the rear is closed by connecting the rear wall 9 to the end face. The extending end 3b of the drive shaft 3 is passed through this rear wall 9, and an oil feed pump is placed around the rear end shaft in a space between the rear wall 9 and an end plate 10 that is further joined to the rear end surface. I am trying to install it. This oil feed pump has an end plate (rear wall of the oil feed pump) 10
The oil drawn from the suction port 11 opened in the second
It is responsible for sequentially supplying the pump from the stage pump body to each pump chamber of the first stage pump body, and its configuration and attached mechanisms are as described below.
以上のようにして、ベースボデイ１の反モータ
側端面に、中間壁７、第２段ポンプ本体、後壁
９および端板１０を接合して組立てるとともに、
その組立完了後ベースボデイ１の後端面にこれら
の組立要素を包囲する油槽ケース１２を連着し、
該油槽ケース１２及びベースボデイ１の内部に形
成した空間に所定量の油Ｏ（その油面が前記吸込
口１１の上方に位置される）が注入貯溜される。 As described above, the intermediate wall 7, the second stage pump body, the rear wall 9, and the end plate 10 are joined and assembled to the end surface of the base body 1 on the side opposite to the motor, and
After completing the assembly, an oil tank case 12 surrounding these assembly elements is attached to the rear end surface of the base body 1,
A predetermined amount of oil O (the oil level is located above the suction port 11) is injected and stored in a space formed inside the oil tank case 12 and the base body 1.
なお、その他図において、１３は第１段ポンプ
本体に設けた中間排気口であり、被排気系の圧
力が高い場合などに付帯のリリーフ弁機構１４を
開放して、第１段ポンプ本体からベースボデイ
１の内部に形成した排気空間１５に直接排気を放
出させる。また１６は第２段ポンプに設けた排
気口で、排気弁機構１７を備えて第１、第２段ポ
ンプ本体，で圧縮した排気を一定の排気圧で
間欠的に放出させる。更に１８は油槽ケース１２
の後部上方に設けたポンプの排気口であり、この
油槽ケース１２の空間とベースボデイ１の前記排
気空間１５とに介設された仕切隔板１９および該
油槽ケース１２内で前記排気口１６の上方に配設
した山形の仕切板２０とにより案内される第１、
第２段ポンプ本体，からの排気が、油滴を分
離した後ここから外部に放出される。 In the other figures, reference numeral 13 is an intermediate exhaust port provided in the first stage pump body, and when the pressure in the system to be exhausted is high, the attached relief valve mechanism 14 is opened and the base is removed from the first stage pump body. Exhaust gas is directly released into an exhaust space 15 formed inside the body 1. Reference numeral 16 denotes an exhaust port provided on the second stage pump, which is equipped with an exhaust valve mechanism 17 to intermittently discharge the exhaust gas compressed by the first and second stage pump bodies at a constant exhaust pressure. Furthermore, 18 is the oil tank case 12
This is the exhaust port of the pump provided at the rear upper part of the oil tank case 12 and the partition plate 19 interposed between the space of the oil tank case 12 and the exhaust space 15 of the base body 1, and the exhaust port 16 inside the oil tank case 12. A first, guided by a chevron-shaped partition plate 20 disposed above;
The exhaust gas from the second stage pump body is discharged to the outside from here after separating the oil droplets.
しかして、前記油送りポンプを第２図につい
て詳述すると、油送りポンプは前記後壁（油送
りポンプ前、外壁）９の後端央部に、その固定子
S3の空間を凹設し、この固定子S3内に駆動軸延出
端３ｂにおける後端近傍で同軸上に固定された回
転子R3を配置してなるもので、この場合、回転
子R3から放射状に適数枚のベーンを突没自在に
突設するベーン形ポンプを構成してなるものであ
る。この油送りポンプは、それ自身僅かな吐出
量で足るポンプ容積の小さなものであつて、駆動
軸３に入力されるモータ動力を一部利用して駆動
される。そして、この油送りポンプの前記吸込
口１１は、その後端面を閉塞している前記端板
（油送りポンプ後壁）１０を貫通して、該端板１
０の後表面に凹設され、油面下に位置する吸込ポ
ート２１に開口されている。そして、吸込ポート
２１には、その周囲の端板***部１０ａに外周を
固定したフイルター２２を張設してあり、油槽ケ
ース１２内で貯溜されている油を油面下の適当な
位置から該フイルター２２を介し濾過して吸込ポ
ート２１内に吸引するようにしている。 The oil feed pump will be described in detail with reference to FIG. 2.
A space S 3 is recessed, and a rotor R 3 coaxially fixed near the rear end of the drive shaft extension end 3b is disposed within the stator S 3. In this case, the rotor R 3 is This is a vane type pump in which an appropriate number of vanes are protruded radially from R3 in a manner that they can be protruded and retracted. This oil feed pump itself has a small pump volume that requires only a small discharge amount, and is driven using part of the motor power input to the drive shaft 3. The suction port 11 of this oil feed pump passes through the end plate (oil feed pump rear wall) 10 that closes the rear end surface, and passes through the end plate 10 (oil feed pump rear wall).
It is recessed in the rear surface of the oil tank 0 and opens to a suction port 21 located below the oil level. A filter 22 whose outer periphery is fixed to the end plate protrusion 10a around the suction port 21 is installed, and the oil stored in the oil tank case 12 is filtered from an appropriate position below the oil surface. It is filtered through a filter 22 and sucked into the suction port 21.
他方、油送りポンプの吐出口２３には、油槽
ケース１２内から汲取つた油を先ず第２ポンプ本
体のポンプ室に送り込むための油通路２４，２
５が開通される（第２段ポンプ本体のポンプ室
から第１段ポンプ本体のポンプ室に油を導く通
路は便宜上図示省略している）。そして、前記後
壁（油送りポンプ前、外壁）９の内部に形成され
るこれら油通路２４，２５の途中には、油送りポ
ンプからの油の供給量を調整する流量調整弁の
役目を果す弁機構２６を設置している。この弁機
構２６は、後壁９の上部に、その底部外周で前記
油通路２４が開通されその底部中心で前記油通路
２５が開通される弁室２７を設け、この弁室２７
に前記油通路２５を塞ぐ突起２８ａは先端に有す
る弁体２８を嵌合するとともに、この弁体２８と
上方の支持板２９との間に支持ガイド３０のまわ
りでスプリング３１の介装し、弁体２８に一定の
開放作動圧を設定するようにしたものである。す
なわち、この弁機構２６によると、その油通路２
４の上流側に一定のポンプ圧力を発生しない場合
は油の流通を阻止し、一定圧力以上が負荷される
場合はその圧力に応じて流路を増減する可変オリ
フイスの働きを営むものとなる。そして、ポンプ
の運転停止時には、油槽ケース１２内からその下
流側への油の侵入を阻止する役目を果す。 On the other hand, the discharge port 23 of the oil feed pump has oil passages 24 and 2 for first sending the oil pumped from inside the oil tank case 12 into the pump chamber of the second pump body.
5 is opened (the passage leading oil from the pump chamber of the second stage pump body to the pump chamber of the first stage pump body is not shown for convenience). In the middle of these oil passages 24 and 25 formed inside the rear wall (in front of the oil feed pump, outer wall) 9, there is a flow rate regulating valve that adjusts the amount of oil supplied from the oil feed pump. A valve mechanism 26 is installed. This valve mechanism 26 is provided with a valve chamber 27 in the upper part of the rear wall 9, in which the oil passage 24 is opened at the outer periphery of the bottom and the oil passage 25 is opened at the center of the bottom.
The protrusion 28a that closes the oil passage 25 fits the valve body 28 at its tip, and a spring 31 is interposed between the valve body 28 and the upper support plate 29 around the support guide 30 to close the valve. A constant opening operating pressure is set in the body 28. That is, according to this valve mechanism 26, the oil passage 2
If a constant pump pressure is not generated on the upstream side of 4, the flow of oil is blocked, and if a constant pressure or higher is applied, the orifice acts as a variable orifice that increases or decreases the flow path according to the pressure. When the pump is stopped, it serves to prevent oil from entering the oil tank case 12 to its downstream side.
以上に説明した２連形の油回転真空ポンプであ
ると、その油送りポンプを、第１段ポンプ本体
を内有するベースボデイ１の一側に連設した第
２段ポンプ本体の後端側、即ちその反モータ側
の駆動軸延出端３ｂに設置するようにしているの
で、その組立が簡単に行なえるものとなる。つま
り、ポンプの組立に際しては、ベースボデイ１
に先ず第２段ポンプ本体の要素を取付、組立し
た後、その後壁（油送りポンプ前、外壁）９の背
面に凹設した固定子S3内に、該固定子S3から突出
される駆動軸延出端３ｂの上でロータR3を組み
込み、更に端板（油送りポンプ後壁）１０を取付
けるようにすればよいので、その組立作業が非常
に簡単に行なえるものとなる。 In the double oil rotary vacuum pump described above, the oil feed pump is connected to one side of the base body 1 containing the first stage pump body, and the rear end side of the second stage pump body, That is, since it is installed at the drive shaft extending end 3b on the side opposite to the motor, the assembly can be easily performed. In other words, when assembling the pump, the base body 1
After first attaching and assembling the elements of the second stage pump body, the drive unit protruding from the stator S 3 is inserted into the stator S 3 recessed in the back of the rear wall (in front of the oil feed pump, outer wall) 9. Since the rotor R3 is assembled on the shaft extending end 3b and the end plate (rear wall of the oil feed pump) 10 is attached, the assembly work can be performed very easily.
また、この油送りポンプにより第２段ポンプ
本体側から送り込まれる油は、その吸込ポート
２１に設けたフイルター２２を介して油槽ケース
１２の油面下より汲取られるものであるため、該
油槽ケース１２の油面に浮く汚染油や混入異物を
吸込むことがなく、異物等がポンプ本体，の
ポンプ室が入り込んでトラブルを起すのを確実に
防止できる。そして又、真空ポンプの運転停止時
には、その弁機構２６が働いて油送りポンプの
油通路２４，２５を遮断し、ポンプ室内に該油通
路２４，２５を通して油槽ケース１２内の貯溜油
が侵入して来る不具合を有効に阻止する。 In addition, the oil sent from the second stage pump main body side by this oil feed pump is pumped up from below the oil surface of the oil tank case 12 via the filter 22 provided in the suction port 21. There is no need to inhale contaminated oil or foreign matter floating on the oil surface of the pump, and it is possible to reliably prevent foreign matter from entering the pump body or the pump chamber and causing trouble. When the vacuum pump stops operating, the valve mechanism 26 operates to shut off the oil passages 24 and 25 of the oil feed pump, and the oil stored in the oil tank case 12 enters the pump chamber through the oil passages 24 and 25. Effectively prevent problems that may occur.
なお、実施例は２連形の油回転真空ポンプに適
用した場合を示すが、本考案は単連形のものにつ
いても同様に適用できることは勿論である。また
油送りポンプとしては、実施例のベーン形ポンプ
に限らず、その他例えば歯車ポンプのような形式
のものであつてもよい。 Although the embodiment shows a case in which the present invention is applied to a double-type oil rotary vacuum pump, it goes without saying that the present invention can be similarly applied to a single-type oil rotary vacuum pump. Furthermore, the oil feed pump is not limited to the vane type pump of the embodiment, but may be of any other type, such as a gear pump.
［考案の効果］
本考案は、以上に述べたように、油送りポンプ
の配置およびポンプ本体への油供給機構を改良工
夫したことにより、特にその油送りポンプの組立
が簡便化され、かつ又ポンプ室への清浄な油の供
給とポンプ停止時の油の侵入防止が確保できる特
性を備えた油回転真空ポンプを実現し得る。[Effects of the invention] As described above, the present invention has improved the arrangement of the oil feed pump and the oil supply mechanism to the pump body, which particularly simplifies the assembly of the oil feed pump. It is possible to realize an oil rotary vacuum pump having characteristics that can ensure supply of clean oil to the pump chamber and prevention of oil intrusion when the pump is stopped.
第１図は本考案の一実施例を示す２連形の油回
転真空ポンプの縦断面図であり、第２図はその要
部の詳細拡大図である。
……第１段ポンプ本体、……第２段ポンプ
本体、……油送りポンプ、１……ベースボデ
イ、３……駆動軸、３ｂ……駆動軸延出端、１１
……吸込口、１２……油槽ケース、Ｏ……油、２
１……吸込ポート、２２……フイルター、２３…
…吐出口、２４，２５……油通路、２６……弁機
構。
FIG. 1 is a longitudinal cross-sectional view of a dual oil rotary vacuum pump showing an embodiment of the present invention, and FIG. 2 is a detailed enlarged view of the main parts thereof. ...First stage pump body, ...Second stage pump main body, ...Oil feed pump, 1...Base body, 3...Drive shaft, 3b...Drive shaft extension end, 11
...Suction port, 12...Oil tank case, O...Oil, 2
1...Suction port, 22...Filter, 23...
...Discharge port, 24, 25...Oil passage, 26...Valve mechanism.
Claims (1)
りポンプを設け、油槽ケース内の油面下にフイル
ターを介して該油送りポンプの吸込口を開口させ
るとともに、この油送りポンプから前記ポンプ本
体に油を送り込む油通路に、ポンプ停止時での油
の侵入を阻止する弁機構を設けたことを特徴とす
る油回転真空ポンプ。 An oil feed pump is provided at the end of the drive shaft on the side opposite to the motor of the pump body, and the suction port of the oil feed pump is opened below the oil level in the oil tank case through a filter, and the oil feed pump is connected to the pump body. An oil rotary vacuum pump characterized in that an oil passage through which oil is sent is provided with a valve mechanism that prevents oil from entering when the pump is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20300386U JPH0444867Y2 (en) | 1986-12-31 | 1986-12-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20300386U JPH0444867Y2 (en) | 1986-12-31 | 1986-12-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63174580U JPS63174580U (en) | 1988-11-11 |
| JPH0444867Y2 true JPH0444867Y2 (en) | 1992-10-22 |
Family
ID=31167920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20300386U Expired JPH0444867Y2 (en) | 1986-12-31 | 1986-12-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0444867Y2 (en) |
-
1986
- 1986-12-31 JP JP20300386U patent/JPH0444867Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63174580U (en) | 1988-11-11 |
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