JPH03221166A - Rotary atomizing electrostatic painting machine - Google Patents
Rotary atomizing electrostatic painting machineInfo
- Publication number
- JPH03221166A JPH03221166A JP9016749A JP1674990A JPH03221166A JP H03221166 A JPH03221166 A JP H03221166A JP 9016749 A JP9016749 A JP 9016749A JP 1674990 A JP1674990 A JP 1674990A JP H03221166 A JPH03221166 A JP H03221166A
- Authority
- JP
- Japan
- Prior art keywords
- air
- bearing
- turbine
- runner
- rotating shaft
- 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
- 238000010422 painting Methods 0.000 title description 4
- 239000003973 paint Substances 0.000 claims description 26
- 238000009503 electrostatic coating Methods 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 239000012528 membrane Substances 0.000 abstract 1
- 238000005192 partition Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012811 non-conductive material Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
- B05B3/1035—Driving means; Parts thereof, e.g. turbine, shaft, bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
- B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
- B05B3/1092—Means for supplying shaping gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0426—Means for supplying shaping gas
Landscapes
- Electrostatic Spraying Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、霧化頭を高速回転させて塗料を霧化する回転
霧化静電塗装機に係り、特に霧化頭を取付けた回転軸を
非接触型軸受にて支ホする回転霧化静電塗装機に関する
。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a rotary atomizing electrostatic coating machine that atomizes paint by rotating an atomizing head at high speed, and particularly relates to a rotary atomizing electrostatic coating machine that atomizes paint by rotating an atomizing head at high speed. This invention relates to a rotary atomizing electrostatic coating machine that is supported by a non-contact type bearing.
（従来の技術）
回転霧化静電塗装機による塗装面の外観品質は霧化頭の
回転速度に依存し、その回転速度が大きくなるほど塗料
か微細化し、秀麗に仕上がるようになる。したかって回
転霧化静電塗装機にあっては、霧化頭の回転速度をいか
に高めるかか重要な課題となるが、該回転軸を汎用のグ
リース潤滑した軸受で支承したのでは、軸受の劣化から
くる制約によって回転軸の回転速度は２０００Ｏｒｐｍ
程度が限界となり、この程度の回転速度では所望の外観
品質を確保することが困難になる。(Prior Art) The quality of the appearance of a surface painted by a rotary atomizing electrostatic coating machine depends on the rotational speed of the atomizing head, and the higher the rotational speed, the finer the paint becomes and the more beautiful the finish. Therefore, in a rotary atomizing electrostatic coating machine, an important issue is how to increase the rotational speed of the atomizing head, but if the rotating shaft is supported by a general-purpose grease-lubricated bearing, the bearing Due to constraints due to deterioration, the rotation speed of the rotating shaft is 2000 rpm.
This is the limit, and it becomes difficult to ensure the desired appearance quality at this level of rotation speed.
そこで、該回転軸を非接触型の軸受にて支承することが
注目され、既に特公昭８３−５２９４８号公報、特公昭
８２−２４１３９号公報、特公昭８２−４６２２０号公
％ｉ等に明らかにされている。この種の回転霧化静電塗
装機は、先端に霧化頭を取付けた回転軸を非接触型ラジ
アル軸受および非接触型スラスト軸受を介してハウソン
グに支持させると九に、この回転軸をタービンにより回
転し、堂籾／ルズから吐出した塗料を前記霧化頭内部か
らその前面に導いて遠心力により霧化し、がっ該霧化頭
を通して塗料を帯電するようにしたもので、軸受の劣化
をほとんど無視できるため５回転軸すなわち霧化頭を超
高速（５００００〜８００００ｒｐｍ ）で回転させる
ことが可能になり、前記した塗装面の外観品質は著しく
向上するようになる。Therefore, supporting the rotating shaft with a non-contact type bearing has attracted attention, and it has already been disclosed in Japanese Patent Publication No. 83-52948, Japanese Patent Publication No. 82-24139, Japanese Patent Publication No. 82-46220, etc. has been done. This type of rotary atomizing electrostatic coating machine has a rotary shaft with an atomizing head attached to the tip supported by a housing song through a non-contact radial bearing and a non-contact thrust bearing. The paint discharged from the atomizing head is guided from inside the atomizing head to the front surface of the atomizing head, where it is atomized by centrifugal force, and the paint is charged through the atomizing head, which prevents bearing deterioration. Since this can be almost ignored, it becomes possible to rotate the five rotating shafts, that is, the atomizing head, at an ultra-high speed (50,000 to 80,000 rpm), and the appearance quality of the painted surface is significantly improved.
（発明が解決しようとする課題）
ところで、上記非接触型軸受により回転軸を支承する従
来の回転霧化静電塗装機において、回転軸を回転させる
タービンは、該回転軸から後方へ延長した小径軸部に設
けられ、かつハウジングで囲んだタービン室に臨む構成
とされていた。このため、この種の回転霧化静電塗装機
は、全体として大型となって重量増加が避けられず、例
えばこれを塗装ロポー、トに持たせようとすると、前記
形状および重量面の制約によって塗装ロボットの複雑、
多様、迅速な動きが阻害され、実質、その適用は断念せ
ざるを得ない状況にあった・
本発明は、上記従来の問題を解決することを課題として
なされたもので、その目的とするところは、非接触型軸
受により回転軸を支承する回転霧化静電塗装機において
、その小型、軽量化を図り、もって適用範囲の拡大を達
成することにある。(Problems to be Solved by the Invention) By the way, in the conventional rotary atomizing electrostatic coating machine in which the rotating shaft is supported by the non-contact type bearing, the turbine that rotates the rotating shaft has a small diameter that extends rearward from the rotating shaft. It was installed on the shaft and faced the turbine chamber surrounded by a housing. For this reason, this type of rotary atomizing electrostatic atomizer is unavoidably large and heavy.For example, if you try to carry it on a painting machine, it will be difficult to use it due to the shape and weight constraints mentioned above. The complexity of painting robots,
Diverse and rapid movements were obstructed, and in reality, the application of the invention had to be abandoned.The present invention was made with the aim of solving the above-mentioned conventional problems, and its purpose is to The object of the present invention is to reduce the size and weight of a rotary atomizing electrostatic coating machine whose rotating shaft is supported by a non-contact bearing, thereby expanding its range of application.
（課題を解決するための手段）
本発明は、上記目的を達成するため、先端に霧化頭を取
付けた回転輪を非接触型ラジアル軸受および非接触型ス
ラスト軸受を介してハウジングに支持させると共に、該
回転軸をタービンにより回転し、塗料ノズルから吐出し
た塗料を前記霧化頭内部からその前面に導いて遠心力に
より霧化し、かつ該霧化頭を通じて塗料を帯電するよう
にした回転霧化静電塗装機において、前記回転軸の後端
に非接触型スラスト軸受により支承されるランナーを設
け、該ランナーの外周部ｌこ回転軸の駆動源となるター
ビンを一体に形成するように構成したことを特徴とする
。(Means for Solving the Problems) In order to achieve the above object, the present invention supports a rotating wheel having an atomizing head attached to its tip in a housing via a non-contact radial bearing and a non-contact thrust bearing. , a rotary atomizer in which the rotating shaft is rotated by a turbine, the paint discharged from the paint nozzle is guided from inside the atomizing head to the front surface thereof, atomized by centrifugal force, and the paint is charged through the atomizing head. In the electrostatic coating machine, a runner supported by a non-contact type thrust bearing is provided at the rear end of the rotating shaft, and a turbine serving as a driving source for the rotating shaft is integrally formed on the outer circumference of the runner. It is characterized by
（発明において、上記非接触型軸受は、非接触状態で回
転軸を支承できれば、特にその形式を問わないもので１
例えば、動圧式空気軸受、静圧式空気軸受、磁気軸受等
を用いることができる。(In the invention, the above-mentioned non-contact type bearing is not particularly limited in its type as long as it can support the rotating shaft in a non-contact state.
For example, a dynamic pressure air bearing, a static pressure air bearing, a magnetic bearing, etc. can be used.
また本発明において、上記ハウジングは内・ガニ重構造
としても良いもので、この場合は内側のハウジングを導
電性材料から、外側のハＳ７Ｃングを非４電性材料から
それぞれ形成することにより、内側のハウジングを通じ
て回転輪番こ高電圧を印加することかできる。Further, in the present invention, the above-mentioned housing may have an inner and double layered structure. In this case, the inner housing is made of a conductive material and the outer S7C ring is made of a non-quaternary conductive material. High voltage can be applied through the housing in rotation.
（作用）
上記のように構成した回転霧化静電塗装機においては、
回転軸の後端に設けたランナーにタービンを一体形成し
たので、回転軸からタービン取付けのための軸部を省略
できるばかりか ランナーとタービンとの共用により部
品点数を削減でき、小型、軽量化に寄与し得るものとな
る。(Function) In the rotary atomizing electrostatic coating machine configured as above,
Since the turbine is integrally formed on the runner installed at the rear end of the rotating shaft, not only can the shaft part for attaching the turbine to the rotating shaft be omitted, but the number of parts can be reduced by sharing the runner and the turbine, resulting in a smaller size and lighter weight. It will be something that can contribute.
（実施例）
以下、本発明の実施例を添付図面にもとづいて説明する
。(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.
第１図〜第５図において、ｌは導電性材料から成る内ハ
ウジングで、円筒状の前部筒体２と有底筒状の後部筒体
３とをポルト ４により一体に結合して戒っている。内
ハウジング１は、非導電性材料から成る有底筒状の外ハ
ウジング４に、その前部筒体２が該外ハウジング５の底
部Ｃ前端壁）６側に位置するように納められている。外
ハウジング５の内部は、その前端壁８（１と開口部側と
の２箇所に段差５ａ、５ｂを有する段付形状をなしてお
り、内ハウジングｌは、その前部側および後部側を外ハ
ウジング５の各段に嵌合させて半径方向に拘束されてい
る。また外ハウジング５の開口端には、同じく非導電性
材料から成る柱状の支持体７がポルト ８により結合さ
れており、前記内ハウジング１は、この支持体７により
段差の１つ５ｂに対して押えられて軸方向に拘束されて
いる。か覧る組付状態において、前部ハウジング１の周
りには環状のエアポート ９が形成され、また内ハウジ
ング Ｉの先端と外ハウジング５の前端壁６との間には
所定の間隔の隙（空気室） １０が形成される。なお、
外ハウジング ５の前端壁・８には貫通孔６ａが設けら
れると共に、その胴部には前記エアポート ９に連通ず
る第１のエア排出通路１１が設けられている。In Figs. 1 to 5, l denotes an inner housing made of a conductive material, in which a cylindrical front body 2 and a bottomed cylindrical rear body 3 are integrally connected by a port 4. ing. The inner housing 1 is housed in a bottomed cylindrical outer housing 4 made of a non-conductive material such that its front cylinder body 2 is located on the bottom C (front end wall) 6 side of the outer housing 5. The inside of the outer housing 5 has a stepped shape with steps 5a and 5b at two places on the front end wall 8 (1 and the opening side), and the inner housing l has the front side and the rear side on the outside. It is fitted into each stage of the housing 5 and restrained in the radial direction.A columnar support 7, also made of a non-conductive material, is connected to the open end of the outer housing 5 by a port 8. The inner housing 1 is held against one of the steps 5b by the support 7 and restrained in the axial direction.In the assembled state shown, an annular air port 9 is formed around the front housing 1. A gap (air chamber) 10 with a predetermined interval is formed between the tip of the inner housing I and the front end wall 6 of the outer housing 5.
A through hole 6a is provided in the front end wall 8 of the outer housing 5, and a first air discharge passage 11 communicating with the air port 9 is provided in the body thereof.
１２は回転軸で、後に詳述するラジアル空気軸受２５と
スラスト空気軸受２６とを介して内ハウジング ｌに回
動自在に支持されている０回転軸１２は、ラジアル空気
軸受２５に支承される本体部１３と、この本体部１３の
先端から前記外ハウシング５の前端ｖ６の貫通孔８ａを
挿通して前方へ延ばされた小径軸部１４と、本体部１２
の後端に一体形成されスラスト空気軸受２６により支承
されるランナー１５とを備えている。＠１転軸！２の先
端の小径軸部１４は、前記貫通孔６ａの内周面との間に
微小隙間を形成する膨出部１４ａと先細に形成されたテ
ーバ部＋４ｂとを有しており（第２図）、その子−パ部
１４ｂにはカンブ状の霧化頭１６がボルト１７を利用し
て嵌合固定されている。霧化頭１６は 隔壁ｌｅａによ
って区画された内室１８ｂを有すると共に、隔壁ｌｅａ
の周縁部においてこの内室１６ｂと霧化頭前面とを連通
ずる複数の連通孔１６ｃ を有している。Reference numeral 12 denotes a rotating shaft, which is rotatably supported in the inner housing l via a radial air bearing 25 and a thrust air bearing 26, which will be detailed later. portion 13, a small diameter shaft portion 14 extending forward from the tip of the main body portion 13 through the through hole 8a of the front end v6 of the outer housing 5, and the main body portion 12.
The runner 15 is integrally formed at the rear end of the runner 15 and supported by a thrust air bearing 26. @1 rotation axis! The small-diameter shaft portion 14 at the tip of No. 2 has a bulging portion 14a that forms a minute gap with the inner circumferential surface of the through hole 6a and a tapered portion +4b (see Fig. 2). ), a cylindrical atomizing head 16 is fitted and fixed to the child part 14b using bolts 17. The atomizing head 16 has an inner chamber 18b partitioned by a partition wall lea, and has an inner chamber 18b partitioned by a partition wall lea.
A plurality of communication holes 16c are provided at the peripheral edge of the atomizing head to communicate the inner chamber 16b with the front surface of the atomizing head.
外ハウジング ５の前端壁６には塗料通路１８が設けら
れ、この塗料通路１８の前記前端壁６への開口部には塗
料ノズル１９か取付けられている。A paint passage 18 is provided in the front end wall 6 of the outer housing 5, and a paint nozzle 19 is attached to the opening of the paint passage 18 into the front end wall 6.
塗料通路１８には塗料供給手段（ＴＩ！Ｊ示略）から塗
料か給送されるようになっており、この給送された塗料
は、塗料ノズル１Ｓの先端から霧化頭１６の隔壁１６ａ
に向けて噴射され、さらに連通孔１６Ｃを流通して霧化
頭１６の前面に導かれるようになる。また外ハウシング
５の前端壁６には、該前端壁の前面との間に環状の空気
室２ｏを形成するカバー２Ｉが装着されている。カバー
２１は、その周回り方向に多数のエア吹出口２１ａを有
し、外ハウシング５に設けたエア通路２２を通じて前記
空気室２０に給送された圧縮エアか、このエア吹出口２
１ａからシェーピングエアとして霧化頭１６の周りに噴
射されるようになっている。Paint is supplied to the paint passage 18 from a paint supply means (TI!J not shown), and the supplied paint is passed from the tip of the paint nozzle 1S to the partition wall 16a of the atomizing head 16.
The liquid is injected toward the atomizing head 16 and further flows through the communication hole 16C to be guided to the front surface of the atomizing head 16. Further, a cover 2I is attached to the front end wall 6 of the outer housing 5, and forms an annular air chamber 2o between the cover 2I and the front surface of the front end wall. The cover 21 has a large number of air outlets 21a in its circumferential direction, and compressed air supplied to the air chamber 20 through an air passage 22 provided in the outer housing 5 or the air outlets 2
Shaping air is injected from 1a around the atomizing head 16.
ラジアル空気軸受２５は、内ハウジング ｌに密封的に
嵌着された軸受本体２７を備えている。この軸受本体２
７の後端にはスラスト空気軸受２６を構成する環状の第
１の軸受板２８が外フランジ様に一体に設けられ、この
＄１の軸受板２８も内ハウジング １に密封的に嵌着さ
れている。軸受本体２７は、その外周の軸方向前端部と
中間部とに環状突部２９ａ、２９ｂを有し、これら環状
突部２８ｄ。The radial air bearing 25 includes a bearing body 27 that is sealingly fitted into an inner housing l. This bearing body 2
An annular first bearing plate 28 constituting a thrust air bearing 26 is integrally provided at the rear end of 7 like an outer flange, and this bearing plate 28 of $1 is also hermetically fitted into the inner housing 1. There is. The bearing main body 27 has annular protrusions 29a and 29b at the front end in the axial direction of its outer periphery and at an intermediate part thereof, and these annular protrusions 28d.
２９ｂを内ハウジング１への嵌合部としている。29b is a fitting portion to the inner housing 1.
これにより軸受本体２７の周りには、その軸方向に離間
して２つの環状のエアポート３０ａ、３０ｂが形成され
ている。また軸受本体２７の内周の軸方向中間部には環
状の溝３１が設けられ、この＊３１は、軸受本体２７の
環状突部の一つ２９ｂと内ハウジングｌとに穿設した共
通の第２のエア排出通路３２を介して前記エアポート
９に連通している。Thereby, two annular air ports 30a and 30b are formed around the bearing body 27, spaced apart in the axial direction thereof. Further, an annular groove 31 is provided in the axially intermediate portion of the inner circumference of the bearing body 27, and this *31 is a common groove formed in one of the annular protrusions 29b of the bearing body 27 and the inner housing l. the air port through the air discharge passage 32 of
It is connected to 9.
Ｌ記軸受本体２７には、第３図に示すように周回り方向
に多数の第１のエア吹出口３３か設けられている。この
エア吹出口３３は軸受本体２７の軸方向に複数列（こ＼
では、４列）設けられ、その前側の２列と後側の２列と
が前記軸受本体２７の周りの２つのエアポーｈ ３０ａ
、３０ｂに対応している。そして、この２つのエアポー
） ３０ａ、３０ｂは内ハウジング １の＃７７部筒体
２に設けた第１のエア供給通路３４にそれぞれ連通し、
この第１のエア供給通路３４はさらに内ハウシング １
の後部筒体３に設けた第２のエア供給通路３５に連通し
ている。なお第１の軸受板２８には、その周回り方向に
多数の第２のエア吹出口３６が穿設されており、各エア
吹出口３６は前記第１のエア供給通路３４に開口してい
る。As shown in FIG. 3, the L bearing body 27 is provided with a large number of first air outlets 33 in the circumferential direction. The air outlet 33 is arranged in multiple rows in the axial direction of the bearing body 27.
4 rows) are provided, and the two rows on the front side and the two rows on the rear side are the two air holes h 30a around the bearing body 27.
, 30b. These two air ports 30a and 30b each communicate with a first air supply passage 34 provided in the #77 section cylindrical body 2 of the inner housing 1,
This first air supply passage 34 is further connected to the inner housing 1
It communicates with a second air supply passage 35 provided in the rear cylinder body 3 of. Note that a large number of second air outlets 36 are bored in the first bearing plate 28 in its circumferential direction, and each air outlet 36 opens into the first air supply passage 34. .
一方、内ハウジングｌの後部筒体３内にはスラスト空気
軸受２６を構成する他方の第２の軸受板３７が配設され
ている。この第２の軸受板３７は、その軸心に有するボ
ス部３７ａを後部筒体３に設けた中央孔３８に嵌入させ
た状態で内ハウジノブ １に密封的に嵌着されている。On the other hand, the other second bearing plate 37 constituting the thrust air bearing 26 is disposed within the rear cylinder body 3 of the inner housing l. This second bearing plate 37 is hermetically fitted to the inner housing knob 1 with a boss portion 37a provided at its axis fitted into a central hole 38 provided in the rear cylinder body 3.
第２の軸受板３７はまた、う／デー１５の外周を囲むよ
うに配したスペーサ３３を介して第１の軸受板２８に対
向し、これによって両軸受板２８．３７とランナー１５
との間には微小隙間が確保されるようになっている。ま
た、第２の軸受板３７と後部筒体３とのｌｊｌには、該
後部筒体に設けた環状溝によって提供されるエアポー）
４０が形成されている。The second bearing plate 37 also faces the first bearing plate 28 via a spacer 33 arranged so as to surround the outer periphery of the runner 15.
A small gap is ensured between the two. In addition, an air hole between the second bearing plate 37 and the rear cylinder 3 is provided by an annular groove provided in the rear cylinder.
40 is formed.
このエアポート４０には、第２の軸受板３７に、その周
回り方向に多数設けた第３のエア吹出口４】が開」コし
、かつ後部筒体３を貫通するエア供給孔４２と前記第２
のエア供給通路３５とが開口している。エア供給孔４２
には、エア源（図示時）から圧縮エアか給達されるよう
になっておりこの給送された圧縮エアは、エアポート４
０から第２のエア供給通路３５、第１のエア供給通路３
４を経てラジアル空気軸受２５側のエアポート３０ａ。This air port 40 has a plurality of third air outlets 4 provided in the circumferential direction of the second bearing plate 37, and an air supply hole 42 penetrating the rear cylinder body 3, and an air supply hole 42 extending through the rear cylinder 3. Second
The air supply passage 35 is open. Air supply hole 42
Compressed air is supplied from an air source (as shown), and this supplied compressed air is delivered to the air port 4.
0 to the second air supply passage 35, the first air supply passage 3
4 to the air port 30a on the radial air bearing 25 side.
３０ｂへと供給される。これによって、各エア吹出口３
３，３６．４１からは、回転軸１２の本体部１３と軸受
本体２７との微小隙間およびランナー１５と第１、第２
の軸受板２８，３？との微小隙間に圧縮エフが噴出され
、回転軸１２はこのエアの薄膜によって支点されるよう
になる。30b. As a result, each air outlet 3
3, 36. 41, the minute gap between the main body 13 of the rotating shaft 12 and the bearing main body 27, and the runner 15 and the first and second
bearing plate 28,3? Compressed air is ejected into the small gap between the air and the rotating shaft 12, and the rotating shaft 12 is supported by this thin film of air.
また第１の軸受板２８には半径方向に貫通して複数の第
３のエア排出通路４３が設けられると共に、内ハウジン
グｌの後部筒体３には前記第３のエア排出通路４３をそ
の中央孔３８に連絡する第４のエア排出通路４４が設け
られている。また第２の軸受板３７のボス部３７ａにも
前記中央孔３８に整合する軸孔４５が設けられ、これら
孔４５．３８は支持体７に設けた第５のエア排出通路４
６と連通している。ラジアル空気軸受２５に利用された
エアは、前部側の一部が空気室１０および外ハウジング
５の前端壁６の貢通孔６ａと回転軸１０の小径軸部１４
との微小隙間を経て外部へ、その中央付近の一部が溝３
１．第２のエア排出通路３２、エアポート ８および第
１のエア排出通路１１を経て外部へ、後部側の一部が第
３のエア排出通路４３第４のエア排出通路４４．後部筒
体３の中央孔３Ｂおよび第５のエア排出通路４６を経て
外部へとそれぞれ排出される。これに対してスラスト空
気軸受２６に利用されたエアは、第１の軸受板２８側の
一部が第３のエア排出通路４３、第４のエア排出通路４
４および前記中央孔３８および第５のエア排出通路４６
を経て外部へ、第２の軸受板３７例の部かボス部３７ａ
に設けた軸孔４５．前記中央孔３８および第５のエア排
出通路４６を経て外部へとそれぞれ排出されるようにな
る。Further, the first bearing plate 28 is provided with a plurality of third air discharge passages 43 passing through it in the radial direction, and the rear cylinder body 3 of the inner housing l has the third air discharge passages 43 at its center. A fourth air exhaust passage 44 is provided which communicates with the hole 38. Further, the boss portion 37a of the second bearing plate 37 is also provided with a shaft hole 45 that aligns with the central hole 38, and these holes 45.38 are connected to the fifth air exhaust passage 4 provided in the support body 7.
It communicates with 6. A portion of the air utilized in the radial air bearing 25 is supplied to the air chamber 10 and the small-diameter shaft portion 14 of the rotating shaft 10 through the air chamber 10 and through hole 6 a of the front end wall 6 of the outer housing 5 .
to the outside through a small gap between the
1. The second air exhaust passage 32, the air port 8, and the first air exhaust passage 11 are passed to the outside, and a portion of the rear side is a third air exhaust passage 43, a fourth air exhaust passage 44. The air is discharged to the outside through the central hole 3B of the rear cylinder 3 and the fifth air discharge passage 46, respectively. On the other hand, the air used in the thrust air bearing 26 is partially connected to the first bearing plate 28 through the third air exhaust passage 43 and the fourth air exhaust passage 4.
4 and the central hole 38 and the fifth air exhaust passage 46
to the outside through the second bearing plate 37 or the boss portion 37a.
The shaft hole 45. The air is discharged to the outside through the central hole 38 and the fifth air discharge passage 46, respectively.
しかして、ランナー１５の外周部にはタービン５０か一
体に形成されている。このタービン５０は、第５図にｉ
ｓに示されるように、ランナー】５の外周面からその軸
線方向に沿って放射状に立４二がるタービンブレード５
１と、タービンブレート５１の相互間に形成された断面
Ｕ字形のタービン流路５２と、第１の軸受板２８に対面
するランナー１５の側端部の延長上に位置して前記ター
ビン流路５２の一端を閉じる側端壁５３とを備えている
。一方、前記タービン流路５２に鴎む第２の軸受板３７
の部位には、その周回り方向に複数のタービンノズル５
４が設けられると共に、ランナー１５を囲む前記スペー
サ３９には、その周回り方向に複数のエア排出孔３９ａ
が設けられている。また第２の軸受板３７と後部筒体３
との間で前記タービンノズル５４に臨む部位には、該後
部筒体に設けた環状溝によって提供されるエアポート５
５が形成されている。このエアポート５５には、後部筒
体３を貫通するエア供給孔５６が開口し、これにはエア
源（図示時）からタービン駆動用エアが給送されるよう
になっている。このエアポート５５に給送されたエアは
、前記タービンノズル５４からタービンブレード５１へ
向けて噴射され、タービン５０を高速で回転させた後、
スペーサ３３のエア排出孔３９ａから上記第４のエア排
出孔４４へ排出される。Thus, a turbine 50 is integrally formed on the outer peripheral portion of the runner 15. This turbine 50 is shown in FIG.
As shown in s, the turbine blades 5 stand radially from the outer peripheral surface of the runner 5 along the axial direction thereof.
1, a turbine passage 52 having a U-shaped cross section formed between the turbine plates 51, and a turbine passage 52 located on an extension of the side end of the runner 15 facing the first bearing plate 28. and a side end wall 53 that closes one end. On the other hand, a second bearing plate 37 that extends into the turbine flow path 52
A plurality of turbine nozzles 5 are installed in the circumferential direction of the part.
4, and the spacer 39 surrounding the runner 15 has a plurality of air discharge holes 39a in the circumferential direction.
is provided. In addition, the second bearing plate 37 and the rear cylinder body 3
An air port 5 provided by an annular groove provided in the rear cylinder body is located at a portion facing the turbine nozzle 54 between the
5 is formed. An air supply hole 56 that penetrates the rear cylinder 3 is opened in the air port 55, and turbine driving air is supplied to this hole from an air source (as shown). The air fed to the air port 55 is injected from the turbine nozzle 54 toward the turbine blades 51 and rotates the turbine 50 at high speed.
The air is discharged from the air discharge hole 39a of the spacer 33 to the fourth air discharge hole 44.
なお、外ハウジング５に結合した支持体７には、内ハウ
ジング１に高電圧を印加するための電極を収納する電極
孔５７が設けられている。Note that the support body 7 coupled to the outer housing 5 is provided with an electrode hole 57 for accommodating an electrode for applying a high voltage to the inner housing 1.
以下、上記のように構成した回転霧化静電塗装機の作用
を説明する。Hereinafter, the operation of the rotary atomizing electrostatic coating machine configured as described above will be explained.
塗装に際しては、予め内ハウジング １のエア供給孔４
２を通してスラスト空気軸受２６側のエアポート４０番
こ圧縮エアを供給する。すると、このエアは、第２のエ
ア供給通路３５および第１のエア供給通路３４を経てラ
ジアル空気軸受２５側のエアポート３０ａ、３０ｂへも
供給され、これによって各エア吹出口３３．３６．４１
からエアが噴出して回転軸１２はエアの薄膜によって支
承されて回転自由の状態となる。その後、内ハウシング
１のエア供給孔５６を通してエアポート５５にタービ
ン駆動用エアを供給し、タービンノズル５４からターヒ
ップレート５１へ向けてエアを噴射する。このエアの噴
射によりランナー１５すなわち回転軸１２は高速で回転
する。これと同時に、電極孔５７に装着した電極を通じ
て内ハウジング １に高電圧（負）を印加する。この高
電圧の印加によりランナー１５と第１．第２の軸受板２
８．３７ との微小隙間および回転軸１２の本体部１１
と軸受本体２７との微小隙間で放電が起こり、回転軸１
２に高電圧か印加され、 この結果、霧化頭１６にも高
電圧が印加される。この状態のもと、外ハウソング ５
の噴粒通路１８に塗料を供給すると、この喰料は、喰料
ノズル１９の先端から霧化頭１６の隔壁１６ｄに向けて
噴射され、隔壁ｌｅａの内面を伝わって連通孔１６ｅか
ら霧化頭１６の前面に流出し、さらにその周部に移動し
て遠心力により霧化される。この間、塗料は霧化頭１６
を通じて負の高電圧に帯電され、霧化塗料は被塗物に向
けて効率良く飛行するようになる。When painting, first open the air supply hole 4 in the inner housing 1.
Compressed air is supplied to air port No. 40 on the thrust air bearing 26 side through No. 2. Then, this air is also supplied to the air ports 30a, 30b on the radial air bearing 25 side via the second air supply passage 35 and the first air supply passage 34, and thereby each air outlet 33, 36, 41
Air is ejected from the rotary shaft 12, and the rotary shaft 12 is supported by the thin film of air and becomes free to rotate. Thereafter, turbine driving air is supplied to the air port 55 through the air supply hole 56 of the inner housing 1, and the air is injected from the turbine nozzle 54 toward the turbine plate 51. This air injection causes the runner 15, that is, the rotating shaft 12, to rotate at high speed. At the same time, a high voltage (negative) is applied to the inner housing 1 through the electrode attached to the electrode hole 57. By applying this high voltage, the runner 15 and the first. Second bearing plate 2
8.37 The small gap between and the main body 11 of the rotating shaft 12
Electric discharge occurs in the minute gap between the bearing body 27 and the rotating shaft 1.
A high voltage is applied to the atomizing head 16, and as a result, a high voltage is also applied to the atomizing head 16. Under this condition, outside how song 5
When the paint is supplied to the spray passage 18 of the paint nozzle 19, the paint is sprayed from the tip of the food nozzle 19 toward the partition wall 16d of the atomization head 16, travels along the inner surface of the partition wall lea, and enters the atomization head from the communication hole 16e. The liquid flows out to the front surface of the tube 16, moves further to its periphery, and is atomized by centrifugal force. During this time, the paint is atomized at 16
The atomized paint is charged to a negative high voltage through the atomizer, and the atomized paint efficiently flies toward the object to be coated.
上記実施例においては、タービン５０のターピノ流路５
２の一端を閉じる側端壁５３をランナー１５の延長部と
して構成したので、ランナー１５の直径を実質縮小して
タービン５０を設けても、第１の軸受板２８側に所望の
軸受面積を確保することができ、したがってスラスト空
気軸受２６の負荷能力が減殺されることはない、塗装機
の大きさ（直径）はスラスト空気軸受２６の直径で支配
されるので、前記タービン５０を含むランナー１５の直
径を抑えた態様は塗装機の小型化にとって好都合となる
。なお、ランナー１５の第２の軸受板３７に対する面は
回転軸１２の端面とされているので、ランナー１５の外
径を縮小しても、軸受面積を確保できるので第２の軸受
板３７偏における負荷能力を十分に確保できる。In the above embodiment, the terpino flow path 5 of the turbine 50
Since the side end wall 53 that closes one end of the runner 15 is configured as an extension of the runner 15, the desired bearing area can be secured on the first bearing plate 28 side even if the diameter of the runner 15 is substantially reduced and the turbine 50 is provided. Therefore, the load capacity of the thrust air bearing 26 is not reduced. Since the size (diameter) of the paint sprayer is controlled by the diameter of the thrust air bearing 26, the load capacity of the runner 15 including the turbine 50 is The mode in which the diameter is suppressed is advantageous for downsizing the coating machine. Note that since the surface of the runner 15 facing the second bearing plate 37 is the end face of the rotating shaft 12, even if the outer diameter of the runner 15 is reduced, the bearing area can be secured, so that the surface of the second bearing plate 37 can be Sufficient load capacity can be ensured.
また、Ｌ記ターヒン５０の側端壁５３の存在により、
タービンノズル５４から噴射したエアがこの側端壁５３
に衝突し、ランナー１５は常時は第１の軸受板２８側に
押圧される。この結果、ランナー１５の軸方向のふらつ
きが防出され、これを高速で回転させても回転軸１１の
回転は安定となる。Furthermore, due to the presence of the side end wall 53 of the L-written Tahin 50,
Air injected from the turbine nozzle 54 hits this side end wall 53.
, and the runner 15 is normally pressed toward the first bearing plate 28 side. As a result, wobbling in the axial direction of the runner 15 is prevented, and the rotation of the rotating shaft 11 becomes stable even when the runner 15 rotates at high speed.
（発明の効果）
以上、詳細に説明したように、本発明にか＼る回転霧化
静電塗装機は、回転軸の後端に設けたランナーの外周部
にタービンを一体に形成するようにしたので、回転軸の
短縮１部品点数の削減等が可能になって小型、軽量化を
達成でき、ロボット等への適用性が増して利用価値が著
しく高まる効果が得られる。(Effects of the Invention) As described above in detail, the rotary atomizing electrostatic coating machine according to the present invention has a turbine integrally formed on the outer circumference of the runner provided at the rear end of the rotating shaft. Therefore, it becomes possible to shorten the rotation axis and reduce the number of parts per unit, thereby achieving a reduction in size and weight, increasing applicability to robots, etc., and achieving the effect of significantly increasing the value of use.
【図面の簡単な説明】
第１図は、未発明にか〜る回転霧化静電塗装機の断面図
、第２図は、その前端部分を拡大して示す断面図、第３
図は、本回転霧化静電塗装機の一部であるラジアル空気
軸受の要部断面図、第４図は、本回転霧化静電塗装機の
後端部分を拡大して示す断面図、第５図は、本回転霧化
静電塗装機の一部であるタービンを示す斜視図である。[Brief Description of the Drawings] Fig. 1 is a sectional view of a rotary atomizing electrostatic coating machine according to the invention, Fig. 2 is an enlarged sectional view of the front end thereof, and Fig. 3 is a sectional view showing an enlarged front end portion thereof.
The figure is a sectional view of a main part of a radial air bearing that is a part of this rotary atomizing electrostatic coating machine, and FIG. 4 is a sectional view showing an enlarged rear end portion of this rotary atomizing electrostatic coating machine. FIG. 5 is a perspective view showing a turbine that is a part of the present rotary atomizing electrostatic coating machine.
Claims (1)
ル軸受および非接触型スラスト軸受を介してハウジング
に支持させると共に、該回転軸をタービンにより回転し
、塗料ノズルから吐出した塗料を前記霧化頭内部からそ
の前面に導いて遠心力により霧化し、かつ該霧化頭を通
じて塗料を帯電するようにした回転霧化静電塗装機にお
いて、前記回転軸の後端に前記非接触型スラスト軸受に
より支承されるランナーを設け、該ランナーの外周部に
前記タービンを一体に形成したことを特徴とする回転霧
化静電塗装機。(1) A rotating shaft with an atomizing head attached to the tip is supported by the housing via a non-contact radial bearing and a non-contact thrust bearing, and the rotating shaft is rotated by a turbine to collect paint discharged from the paint nozzle. In the rotary atomizing electrostatic coating machine, the paint is guided from inside the atomizing head to the front surface thereof, atomized by centrifugal force, and charged through the atomizing head, and the non-contact type is attached to the rear end of the rotating shaft. A rotary atomizing electrostatic coating machine, characterized in that a runner is provided that is supported by a thrust bearing, and the turbine is integrally formed on the outer periphery of the runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9016749A JPH03221166A (en) | 1990-01-27 | 1990-01-27 | Rotary atomizing electrostatic painting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9016749A JPH03221166A (en) | 1990-01-27 | 1990-01-27 | Rotary atomizing electrostatic painting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03221166A true JPH03221166A (en) | 1991-09-30 |
Family
ID=11924917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9016749A Pending JPH03221166A (en) | 1990-01-27 | 1990-01-27 | Rotary atomizing electrostatic painting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03221166A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1502655A2 (en) | 2003-07-29 | 2005-02-02 | Illinois Tool Works Inc. | Powder bell with secondary charging electrode |
| US6889921B2 (en) | 2002-09-30 | 2005-05-10 | Illinois Tool Works Inc. | Bell cup skirt |
| KR100587927B1 (en) * | 2004-04-06 | 2006-06-08 | 대한도장플랜트(주) | Blade type air turbine and painting equipment with the air turbine |
| US8371517B2 (en) | 2007-06-29 | 2013-02-12 | Illinois Tool Works Inc. | Powder gun deflector |
| JP2013108411A (en) * | 2011-11-18 | 2013-06-06 | Nsk Ltd | Static pressure gas bearing spindle and electrostatic coating device equipped therewith |
| US10155233B2 (en) | 2008-04-09 | 2018-12-18 | Carlisle Fluid Technologies, Inc. | Splash plate retention method and apparatus |
-
1990
- 1990-01-27 JP JP9016749A patent/JPH03221166A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6889921B2 (en) | 2002-09-30 | 2005-05-10 | Illinois Tool Works Inc. | Bell cup skirt |
| EP1502655A2 (en) | 2003-07-29 | 2005-02-02 | Illinois Tool Works Inc. | Powder bell with secondary charging electrode |
| US7128277B2 (en) | 2003-07-29 | 2006-10-31 | Illinois Tool Works Inc. | Powder bell with secondary charging electrode |
| KR100587927B1 (en) * | 2004-04-06 | 2006-06-08 | 대한도장플랜트(주) | Blade type air turbine and painting equipment with the air turbine |
| US8371517B2 (en) | 2007-06-29 | 2013-02-12 | Illinois Tool Works Inc. | Powder gun deflector |
| US8888018B2 (en) | 2007-06-29 | 2014-11-18 | Illinois Tool Works Inc. | Powder gun deflector |
| US10155233B2 (en) | 2008-04-09 | 2018-12-18 | Carlisle Fluid Technologies, Inc. | Splash plate retention method and apparatus |
| JP2013108411A (en) * | 2011-11-18 | 2013-06-06 | Nsk Ltd | Static pressure gas bearing spindle and electrostatic coating device equipped therewith |
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