JPH0680026U - Roller bearing for compressor - Google Patents
Roller bearing for compressorInfo
- Publication number
- JPH0680026U JPH0680026U JP019893U JP1989393U JPH0680026U JP H0680026 U JPH0680026 U JP H0680026U JP 019893 U JP019893 U JP 019893U JP 1989393 U JP1989393 U JP 1989393U JP H0680026 U JPH0680026 U JP H0680026U
- Authority
- JP
- Japan
- Prior art keywords
- lubricant
- flange
- outer ring
- roller bearing
- peripheral surface
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/43—Screw compressors
Abstract
(57)【要約】
【目的】潤滑剤が飛散しにくくて、しかも潤滑剤の収容
量を可及的にアップできる構造とすること。
【構成】針状ころ軸受２０の外輪２２を、その内周面の
軸方向中間に軌道溝２５が設けられる構造とし、この外
輪２２の一方の肩部に、内輪２１の外周面との間でラビ
リンスシールを形成するフランジ２８が設けられるとと
もに、このフランジ２８の内側に潤滑剤溜まり空間２９
が設けられる構造とした。フランジ２８と内輪２１の外
周面との間のラビリンスシールが、軸受内部の潤滑剤飛
散を阻止するとともに、このフランジ２８の内方の潤滑
剤溜まり空間２９から、針状ころ２３と外輪２２の鍔２
６，２７とのすべり接触部位へ潤滑剤が供給されるよう
になる。
(57) [Summary] [Purpose] To create a structure in which lubricant is less likely to scatter and the amount of lubricant contained can be increased as much as possible. [Structure] An outer ring 22 of a needle roller bearing 20 has a structure in which a raceway groove 25 is provided at an axially intermediate portion of an inner peripheral surface of the needle roller bearing 20. A flange 28 that forms a labyrinth seal is provided, and a lubricant reservoir space 29 is provided inside the flange 28.
Is provided. The labyrinth seal between the flange 28 and the outer peripheral surface of the inner ring 21 prevents the lubricant from scattering inside the bearing, and from the lubricant accumulating space 29 inside the flange 28, the needle rollers 23 and the collar of the outer ring 22. Two
The lubricant is supplied to the sliding contact portions with 6, 27.
Description
【０００１】[0001]
本考案は、例えば自動車、船舶、一般産業用のエンジンに用いられるスクリュ ー形、ルーツブロア形、スクロール形過給機などの圧縮機の回転軸支持に用いら れる転がり軸受に関する。 The present invention relates to a rolling bearing used for supporting a rotary shaft of a compressor such as a screw type, a roots blower type or a scroll type supercharger used in engines for automobiles, ships and general industries.
【０００２】[0002]
図４に従来のスクリュー形過給機を示している。図中、１，２は互いに噛み合 う雌雄一対のスクリューロータ、３，４はスクリューロータ１，２の軸心両端に 突出するロータ軸、５，６はスクリューロータ１，２を駆動する駆動歯車、７， ８はスクリューロータ１，２を同期回転させるための同期歯車、９は空気の吸入 口９Ａおよび吐出口９Ｂを有するケースである。 FIG. 4 shows a conventional screw type turbocharger. In the figure, 1 and 2 are a pair of male and female screw rotors that mesh with each other, 3 and 4 are rotor shafts projecting from both axial ends of the screw rotors 1 and 2, and 5 and 6 are drive gears for driving the screw rotors 1 and 2. , 7 and 8 are synchronous gears for synchronously rotating the screw rotors 1 and 2, and 9 is a case having an air inlet 9A and an air outlet 9B.
【０００３】 図の右側のロータ軸３，４の支持は設置スペースに制約を受けないから二つず つ組み合わせた深溝型玉軸受１０，１０，１１を用いるようになっているが、図 の左側のロータ軸３，４の支持は設置スペースが制約されるために針状ころ軸受 １２，１２を用いるようになっている。針状ころ軸受１２は、図５に示すように 、単純な円筒形の内輪１３と、内周面にころの軌道溝１７を有する外輪１４と、 内・外輪１３，１４の間に介装される複数の針状ころ１５と、複数の針状ころ１ ５を保持する保持器１６とを備えた一般的なものである。なお、外輪１４の軌道 溝１７の軸方向両側には径方向内向きの鍔１８，１９が設けられている。Since the rotor shafts 3 and 4 on the right side of the drawing are not restricted by the installation space, the deep groove type ball bearings 10, 10 and 11 are used in combination, but the left side of the drawing is used. For supporting the rotor shafts 3 and 4, needle roller bearings 12 and 12 are used because the installation space is limited. As shown in FIG. 5, the needle roller bearing 12 is interposed between a simple cylindrical inner ring 13, an outer ring 14 having a roller raceway groove 17 on its inner peripheral surface, and inner and outer rings 13, 14. A plurality of needle rollers 15 and a cage 16 for holding the plurality of needle rollers 15 are common. In addition, radially inward flanges 18 and 19 are provided on both sides of the raceway groove 17 of the outer ring 14 in the axial direction.
【０００４】 これらのすべての軸受１０〜１２は、高速回転域で使用されるので、潤滑状態 を良好に保つため、グリースなどの潤滑剤が飛散しにくくなるように、ケース９ の空気圧縮室９Ｃから完全ではないが密封された空間９Ｄ，９Ｄ，９Ｅに配置さ れるようになっている。このうち、空間９Ｄ側では、図５に示すように、ケース ９の環状リブ９Ｆとロータ軸３，４の外周面との対向隙間を微小としたいわゆる ラビリンスシールでもって空気圧縮室９Ｃと区分けしている。Since all of these bearings 10 to 12 are used in a high-speed rotation range, in order to maintain a good lubrication state, a lubricant such as grease is less likely to scatter, and the air compression chamber 9C of the case 9 is prevented. It is designed to be placed in a sealed space 9D, 9D, 9E which is not perfect. Of these, on the space 9D side, as shown in FIG. 5, it is separated from the air compression chamber 9C by a so-called labyrinth seal in which the facing gap between the annular rib 9F of the case 9 and the outer peripheral surfaces of the rotor shafts 3 and 4 is minute. ing.
【０００５】[0005]
ところで、上記従来例では、空気圧縮室９Ｃから空間９Ｄ，９Ｄ，９Ｅ側への 圧力漏れが起こるため、各軸受１０〜１２の内部の潤滑剤が簡単に飛散しやすく なっていて潤滑状態が悪くなりやすい。特に針状ころ軸受１２のように外輪１４ の鍔１８，１９に対して針状ころ１５がすべり接触する構造では、寿命が著しく 短くなってしまうなど、改良の余地がある。 By the way, in the above-mentioned conventional example, pressure leakage from the air compression chamber 9C to the spaces 9D, 9D, 9E side occurs, so that the lubricant in each bearing 10-12 easily spatters and the lubrication state is poor. Prone. In particular, in the structure in which the needle roller 15 is in sliding contact with the collars 18 and 19 of the outer ring 14 like the needle roller bearing 12, there is room for improvement such that the life is remarkably shortened.
【０００６】 本考案は、このような事情に鑑み、潤滑剤が飛散しにくくて、しかも潤滑剤の 収容量を可及的にアップできる構造とすることを課題としている。In view of such circumstances, it is an object of the present invention to provide a structure in which the lubricant does not easily scatter and the amount of the lubricant contained can be increased as much as possible.
【０００７】[0007]
本考案は、圧縮機の回転軸の端部支持に用いられるもので、内・外輪間に複数 のころを介装する構成のころ軸受において、外輪の内周面にころの軌道溝が設け られており、かつ、少なくとも前記回転軸の端部側に位置する外輪肩部に、内輪 外周面との間でラビリンスシールを形成するフランジ部が設けられているととも に、このフランジ部ところ配設空間との間に潤滑剤溜まり空間が設けられている 構成とした。 INDUSTRIAL APPLICABILITY The present invention is used for supporting an end portion of a rotary shaft of a compressor.In a roller bearing having a structure in which a plurality of rollers are interposed between an inner ring and an outer ring, a roller raceway groove is provided on an inner peripheral surface of the outer ring. And a flange portion that forms a labyrinth seal with the outer peripheral surface of the inner ring is provided at least on the shoulder portion of the outer ring that is located on the end side of the rotary shaft, and this flange portion is also provided. The structure is such that a lubricant reservoir space is provided between the space and the space.
【０００８】[0008]
鍔のフランジ部と内輪外周面との間のラビリンスシールが潤滑剤飛散を効果的 に阻止する。そして、このフランジ部の内側が潤滑剤溜まり空間とされているか ら、ここから外輪の鍔に対するころのすべり接触部位へ潤滑剤が効率よく供給さ れるようになる。したがって、外輪の鍔に対するころのすべり接触部位の潤滑状 態が良好となる。 The labyrinth seal between the flange of the collar and the outer peripheral surface of the inner ring effectively prevents the lubricant from scattering. Further, since the inside of the flange is a lubricant reservoir space, the lubricant can be efficiently supplied from here to the sliding contact portion of the roller with respect to the flange of the outer ring. Therefore, the lubrication state of the sliding contact portion of the roller with respect to the flange of the outer ring becomes good.
【０００９】[0009]
図１および図２に本考案の一実施例を示している。図例の針状ころ軸受２０は 、単純な円筒形の内輪２１と、内周面にころの軌道溝２５および鍔２６，２７を 有する外輪２２と、内・外輪２１，２２の間に介装される複数の針状ころ２３と 、複数の針状ころ２３を保持する保持器２４とを備えた構造であり、図４に示す 従来の針状ころ軸受と基本構成が同じになっている。 1 and 2 show one embodiment of the present invention. The needle roller bearing 20 of the illustrated example comprises a simple cylindrical inner ring 21, an outer ring 22 having roller raceway grooves 25 and flanges 26, 27 on its inner peripheral surface, and an inner ring 21 and an outer ring 22. The structure is provided with a plurality of needle rollers 23 and a retainer 24 that holds the plurality of needle rollers 23. The basic structure is the same as that of the conventional needle roller bearing shown in FIG.
【００１０】 本実施例の特徴は、外輪２２の軌道溝２５の両側の鍔２６，２７のうちの一方 （図の左側）の鍔２６に内輪２１の外周面との間でラビリンスシールを形成する フランジ２８を設けているとともに、このフランジ２８の内側に潤滑油溜まり空 間２９を設けていることである。この潤滑油溜まり空間２９は、外輪２２の一方 の鍔２６の軸方向幅を若干長く設定することにより空間容量が可及的に大きく設 定されている。The feature of this embodiment is that a labyrinth seal is formed between the outer peripheral surface of the inner ring 21 on one of the flanges 26, 27 (on the left side in the figure) of the flanges 26, 27 on both sides of the raceway groove 25 of the outer ring 22. The flange 28 is provided, and the lubricating oil reservoir space 29 is provided inside the flange 28. The lubricating oil reservoir space 29 is set to have a space capacity as large as possible by setting the axial width of one of the flanges 26 of the outer ring 22 to be slightly longer.
【００１１】 この針状ころ軸受２０を従来例の図４のスクリュー形過給機に用いる場合、図 ２に示すように、外輪２２のフランジ２８付きの鍔２６を、ロータ軸３（４）の 端部側へ配置する。この場合、ケース９の環状リブ９Ｆとロータ軸３（４）の外 周面との対向隙間からの圧力漏れがあっても、前記外輪２２のフランジ２８およ びラビリンスシールでもって針状ころ軸受２０の内部潤滑剤が飛散するのを阻止 するようになる。なお、フランジ２８と内輪２１の外周面との間のラビリンスシ ールから若干の圧力漏れが起こり得るが、潤滑剤がグリースなどの半固形物ゆえ ラビリンスシールから出にくくなる。また、潤滑油溜まり空間２９の潤滑剤は、 回転に伴って外輪２２の鍔２６に対する針状ころ２３のすべり接触部位へ供給さ れるようになる。When the needle roller bearing 20 is used in the conventional screw type turbocharger of FIG. 4, as shown in FIG. 2, the flange 26 with the flange 28 of the outer ring 22 is attached to the rotor shaft 3 (4). Place it on the edge side. In this case, even if there is a pressure leak from the facing gap between the annular rib 9F of the case 9 and the outer circumferential surface of the rotor shaft 3 (4), the flange 28 of the outer ring 22 and the labyrinth seal ensure the needle roller bearing. Twenty internal lubricants will be prevented from splashing. Although some pressure leakage may occur from the labyrinth seal between the flange 28 and the outer peripheral surface of the inner ring 21, it is difficult for the lubricant to come out of the labyrinth seal because the lubricant is a semi-solid substance such as grease. Further, the lubricant in the lubricating oil reservoir space 29 is supplied to the sliding contact portion of the needle roller 23 with respect to the flange 26 of the outer ring 22 as the lubricant rotates.
【００１２】 図３に本考案の他の実施例を示している。この実施例では、内輪２１が長尺に 形成され、この内輪２１に外輪２２が一方（左側）に片寄らせて組み付けられる ようになっている。そして、針状ころ軸受２０のスクリュー形過給機への取り付 けは上記実施例と変わらないが、図示するように、ケース９の環状リブ９Ｆの内 側で内輪２１の他方外周面上にシール３０を配置させてもよい。このようにすれ ば、ケース９の空気圧縮室９Ｃからの圧力漏れそのものを低減できて、針状ころ 軸受２０からの潤滑剤飛散をより効果的に阻止できる結果となる。FIG. 3 shows another embodiment of the present invention. In this embodiment, the inner ring 21 is formed to have a long length, and the outer ring 22 is attached to the inner ring 21 while being offset to one side (left side). Although the needle roller bearing 20 is attached to the screw type turbocharger in the same manner as in the above embodiment, as shown in the drawing, the needle roller bearing 20 is mounted on the other outer peripheral surface of the inner ring 21 inside the annular rib 9F of the case 9. The seal 30 may be arranged. In this case, the pressure leakage itself from the air compression chamber 9C of the case 9 can be reduced, and the lubricant scattering from the needle roller bearing 20 can be more effectively prevented.
【００１３】[0013]
以上のように、本考案によれば、軸受内部の潤滑剤を軸方向へ飛散しにくくで きるとともに、外輪の鍔に対するころのすべり接触部位へ潤滑剤を供給しやすく できるので、潤滑状態が良好となって長寿命化を実現できるようになる。 As described above, according to the present invention, it is possible to prevent the lubricant inside the bearing from scattering in the axial direction and to easily supply the lubricant to the sliding contact portion of the roller with respect to the flange of the outer ring, so that the lubrication condition is good. It becomes possible to realize a long life.
【図１】本考案の圧縮機用転がり軸受の一実施例の縦断
面図。FIG. 1 is a longitudinal sectional view of an embodiment of a rolling bearing for a compressor according to the present invention.
【図２】図１の使用例で、図５に対応する図。FIG. 2 is a diagram corresponding to FIG. 5 in the usage example of FIG. 1;
【図３】本考案の圧縮機用転がり軸受の他の実施例で、
図２に対応する図。FIG. 3 is another embodiment of the rolling bearing for a compressor of the present invention,
The figure corresponding to FIG.
【図４】従来のスクリュー形過給機の縦断面図。FIG. 4 is a vertical sectional view of a conventional screw type supercharger.
【図５】図４の要部の拡大図。5 is an enlarged view of a main part of FIG.
２０ 針状ころ軸受 ２１ 内輪 ２２ 外輪 ２３ 針状ころ ２５ 外輪の軌道溝 ２６，２７ 外輪の鍔 ２８ フランジ ２９ 潤滑剤溜まり空間 20 Needle roller bearing 21 Inner ring 22 Outer ring 23 Needle roller 25 Needle roller raceway groove 26 of outer ring 26, 27 Outer ring collar 28 Flange 29 Lubricant reservoir space
Claims (1)
もので、内・外輪間に複数のころを介装する構成のころ
軸受であって、 外輪の内周面にころの軌道溝が設けられており、かつ、
少なくとも前記回転軸の端部側に位置する外輪肩部に、
内輪外周面との間でラビリンスシールを形成するフラン
ジ部が設けられているとともに、このフランジ部ところ
配設空間との間に潤滑剤溜まり空間が設けられている、
ことを特徴とする圧縮機用ころ軸受。1. A roller bearing used for supporting an end portion of a rotary shaft of a compressor, comprising a plurality of rollers interposed between an inner ring and an outer ring, wherein a roller raceway groove is formed on an inner peripheral surface of the outer ring. Is provided, and
At least the outer ring shoulder located on the end side of the rotating shaft,
A flange portion that forms a labyrinth seal with the outer peripheral surface of the inner ring is provided, and a lubricant reservoir space is provided between the flange portion and the installation space.
A roller bearing for a compressor, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP019893U JPH0680026U (en) | 1993-04-19 | 1993-04-19 | Roller bearing for compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP019893U JPH0680026U (en) | 1993-04-19 | 1993-04-19 | Roller bearing for compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0680026U true JPH0680026U (en) | 1994-11-08 |
Family
ID=12011880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP019893U Pending JPH0680026U (en) | 1993-04-19 | 1993-04-19 | Roller bearing for compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0680026U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007141917A1 (en) * | 2006-06-08 | 2007-12-13 | Ntn Corporation | Bearing device for vehicle |
| WO2015076271A1 (en) * | 2013-11-21 | 2015-05-28 | 日本精工株式会社 | Cylindrical roller bearing and bearing device for transmission |
-
1993
- 1993-04-19 JP JP019893U patent/JPH0680026U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007141917A1 (en) * | 2006-06-08 | 2007-12-13 | Ntn Corporation | Bearing device for vehicle |
| WO2015076271A1 (en) * | 2013-11-21 | 2015-05-28 | 日本精工株式会社 | Cylindrical roller bearing and bearing device for transmission |
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