JPS627851Y2

JPS627851Y2 -

Info

Publication number: JPS627851Y2
Application number: JP1982097689U
Authority: JP
Priority date: 1982-06-28
Filing date: 1982-06-28
Publication date: 1987-02-24
Also published as: JPS591834U

Description

【考案の詳細な説明】本考案はターボチヤージヤ、特にターボチヤー
ジヤの軸受機構に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a turbocharger, and more particularly to a bearing mechanism for a turbocharger.

従来、車輌のエンジン出力の増大に効果的なタ
ーボチヤージヤとして第１図に示されるものが知
られている。このターボチヤージヤ１０は、エン
ジン燃焼ガスの拝気通路の排気入口１１と排気出
口１２を有するタービンハウジング１３と、エン
ジン吸気通路の空気入口１４と加圧空気出口を有
するコンプレツサハウジング１５と、その中間に
位置し、一端にタービンハウジング１３の排気通
路に位置するタービンホイール１６および他端に
コンプレツサハウジング１５の吸気通路に位置す
るコンプレツサホイール１７を有する回転軸１８
を軸受用浮動ブツシユ１９を介して支承するハウ
ジング２０を有する。回転軸１８の小径部上には
コンプレツサホイール１７を介してネジによりカ
ラー２２が固定され、このカラー２２を介する回
転軸１８のスラスト軸受２３によつてその左動が
規制される浮動ブツシユ１９は、そのタービンホ
イール側の右端が回転軸１８の大径オイルスリン
ガー部２４と対面して回転軸１８の軸方向軸受と
しても機能している。２１はシールプレートであ
る。しかし、この種のターボチヤージヤ１０にお
いては、ハウジング２０に形成される潤滑油入口
２５と潤滑油出口２６を連結する潤滑油通路の一
部を構成し、浮動ブツシユ１９の外周側と内周側
を連結するよう浮動ブツシユ１９に形成される複
数の油穴２７が、浮動ブツシユ１９の中心に向つ
て外周側から内周側に開口されている。従つて、
浮動ブツシユ１９の外周側から内周側への潤滑油
の供給が、回転軸１８の回転が増大するに従つ
て、つまり浮動ブツシユ１９の回転数が増大する
に従つて、潤滑油に作用する遠心力が増し、この
増大される遠心力によつて、浮動ブツシユ１９の
外周側から内周側への油穴２７を介する潤滑油の
供給が減少され、回転軸１８と浮動ブツシユ１９
内の焼き付きが発生しやすいという欠点があつ
た。 Conventionally, a turbocharger shown in FIG. 1 has been known as an effective turbocharger for increasing the engine output of a vehicle. This turbocharger 10 includes a turbine housing 13 having an exhaust inlet 11 and an exhaust outlet 12 for an intake passage for engine combustion gas, a compressor housing 15 having an air inlet 14 for an engine intake passage and a pressurized air outlet, and a compressor housing 15 having an air inlet 14 and a pressurized air outlet for an engine intake passage; a rotating shaft 18 having a turbine wheel 16 located at one end located in the exhaust passage of the turbine housing 13 and a compressor wheel 17 located at the other end located in the intake passage of the compressor housing 15;
It has a housing 20 that supports the bearing via a floating bush 19. A collar 22 is fixed to the small diameter portion of the rotary shaft 18 by a screw via the compressor wheel 17, and the floating bush 19 whose leftward movement is regulated by the thrust bearing 23 of the rotary shaft 18 via the collar 22. The right end on the turbine wheel side faces the large-diameter oil slinger portion 24 of the rotating shaft 18, and also functions as an axial bearing for the rotating shaft 18. 21 is a seal plate. However, in this type of turbocharger 10, the lubricating oil passage forms a part of the lubricating oil passage connecting the lubricating oil inlet 25 and the lubricating oil outlet 26 formed in the housing 20, and connects the outer circumferential side and the inner circumferential side of the floating bush 19. A plurality of oil holes 27 are formed in the floating bush 19 so as to open from the outer circumferential side to the inner circumferential side toward the center of the floating bush 19. Therefore,
The supply of lubricating oil from the outer circumferential side to the inner circumferential side of the floating bush 19 increases as the rotation of the rotating shaft 18 increases, that is, as the rotational speed of the floating bush 19 increases, the centrifugal force acting on the lubricating oil increases. This increased centrifugal force reduces the supply of lubricating oil from the outer circumferential side of the floating bush 19 to the inner circumferential side through the oil hole 27, and the rotational shaft 18 and the floating bush 19
The drawback was that internal burn-in was likely to occur.

そこで本考案は、回転軸の回転の増大時にも、
浮動ブツシユの内周側への潤滑油の供給を増加さ
せることを目的とする。 Therefore, the present invention is designed to
The purpose is to increase the supply of lubricating oil to the inner circumferential side of the floating bush.

本考案の構成は、ハウジングに夫々設けられる
潤滑油入口と潤滑油出口を潤滑油通路が、回転軸
の軸受用浮動ブツシユの外周側と内周側を連結す
るよう浮動ブツシユの回転方向に向つて内周側か
ら外周側へ傾斜して設けられる油穴を有すること
にある。従つて、油穴は浮動ブツシヨの回転方向
に向つて傾斜されているので、浮動ブツシユの回
転により潤滑油を油穴に積極的にまき込み潤滑油
の供給が増大できるという所期の目的が達成でき
るとともに、潤滑油の供給を増大させるための特
別の構成を追加する必要がなく、油穴を傾斜させ
るだけでよいという効果がある。 The structure of the present invention is such that the lubricating oil inlet and the lubricating oil outlet provided in the housing are arranged so that the lubricating oil passage connects the outer circumferential side and the inner circumferential side of the floating bushing for the bearing of the rotating shaft in the direction of rotation of the floating bushing. It has an oil hole that is inclined from the inner circumferential side to the outer circumferential side. Therefore, since the oil hole is inclined in the direction of rotation of the floating bush, the rotation of the floating bush actively draws lubricating oil into the oil hole, achieving the intended purpose of increasing the supply of lubricating oil. In addition, there is no need to add a special structure for increasing the supply of lubricating oil, and there is an effect that it is only necessary to tilt the oil hole.

以下、本考案の実施例を第２，第３図に基づい
て説明する。尚、第２，第３図は従来のターボチ
ヤージヤとして示した第１図を異なる要部のみを
示すものである。 Hereinafter, embodiments of the present invention will be described based on FIGS. 2 and 3. Note that FIGS. 2 and 3 show only the main parts that are different from FIG. 1, which shows a conventional turbocharger.

浮動ブツシユ１９は、潤滑油入口２５と潤滑油
出口２６を連結する潤滑油通路の一部を構成する
複数の油穴３０を有し、該油穴３０は、第１図の
潤滑油通路２５ａ，２５ｂと対応して配設され
る。該油穴３０は、第３図で明らかなように、浮
動ブツシユ１９の外周側３１と内周側３２を連結
するよう浮動ブツシユ１９の回転方向Ａに向つて
内周側３２から外周側３１へ傾斜して設けられ
る。更に詳述すると、浮動ブツシユ１９の中心Ｏ
から、第３図で油穴３０と平行にえがかれる線ａ
と、中心Ｏと、油穴３０の内周側３２の中心ｂを
結ぶ線ｃによつて決定される角度θが０゜＜θ≦
90゜となるように油穴３０の夫々が形成される。 The floating bush 19 has a plurality of oil holes 30 forming part of a lubricating oil passage connecting the lubricating oil inlet 25 and the lubricating oil outlet 26, and the oil holes 30 are connected to the lubricating oil passages 25a, 25a, and 25a in FIG. 25b. As is clear from FIG. 3, the oil hole 30 extends from the inner circumferential side 32 to the outer circumferential side 31 in the rotational direction A of the floating bush 19 so as to connect the outer circumferential side 31 and the inner circumferential side 32 of the floating bush 19. It is installed at an angle. More specifically, the center O of the floating bush 19
From this, a line a is drawn parallel to the oil hole 30 in Figure 3.
and the angle θ determined by the line c connecting the center O and the center b of the inner peripheral side 32 of the oil hole 30 is 0°<θ≦
The oil holes 30 are each formed at an angle of 90°.

従つて、上記のように形成される油穴３０に於
ては、油穴３０を介する浮動ブツシユ１９の外周
側３２から内周側３１への潤滑油の供給が潤滑油
自身の油圧による他、浮動ブツシユ１９の回転に
よるまき込み作用により助長してなされる。従つ
て、浮動ブツシユ１９の高回転時にも回転軸１８
と浮動ブツシユ１９間の潤滑が十分保障できる。
尚、上記角度θが大きく形成される程、上記まき
込み作用による潤滑油の供給が増大できる。浮動
ブツシユ１９の第２図の左方油穴３０から分岐す
る通路３３は、スラスト軸受２３と浮動ブツシユ
１９間の潤滑油供給通路であり、右方油穴３０か
ら分岐する通路３４は、回転軸１８のオイルスリ
ンガー部２４と浮動ブツシユ１９間の潤滑油通路
である。浮動ブツシユ１９の第２図中央に設けら
れる油穴３５は、潤滑油出口２６に連結されてい
る。 Therefore, in the oil hole 30 formed as described above, lubricating oil is supplied from the outer peripheral side 32 of the floating bush 19 to the inner peripheral side 31 through the oil hole 30 not only by the oil pressure of the lubricating oil itself, but also by the oil pressure of the lubricating oil itself. This is assisted by the winding action caused by the rotation of the floating bush 19. Therefore, even when the floating bush 19 rotates at high speed, the rotating shaft 18
Sufficient lubrication between the floating bush 19 and the floating bush 19 can be guaranteed.
Incidentally, the larger the angle θ is, the more lubricant can be supplied by the drawing action. A passage 33 branching from the left oil hole 30 of the floating bush 19 in FIG. This is a lubricating oil passage between the oil slinger portion 24 of No. 18 and the floating bush 19. An oil hole 35 provided in the center of the floating bush 19 in FIG. 2 is connected to the lubricating oil outlet 26.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、従来のターボチヤージヤの断面図、
第２図は本発明のターボチヤージヤの要部断面
図、及び第３図は第２図の−線断面図であ
る。１０……ターボチヤージヤ、１３，１５，２０
……ハウジング、１６……タービンホイール、１
７……コンプレツサホイール、１８……回転軸、
１９……浮動ブツシユ、２５……潤滑油入口、２
６……潤滑油出口、３０……油穴。 Figure 1 is a cross-sectional view of a conventional turbocharger.
FIG. 2 is a sectional view of essential parts of the turbocharger of the present invention, and FIG. 3 is a sectional view taken along the line -- in FIG. 10...Turbo charger, 13, 15, 20
...Housing, 16...Turbine wheel, 1
7... Compressor wheel, 18... Rotating shaft,
19...Floating bush, 25...Lubricating oil inlet, 2
6...Lubricating oil outlet, 30...Oil hole.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

ハウジング，該ハウジング内に配設され一端に
排気通路中に位置するタービンホイールを且つ他
端に吸気路中に位置するコンプレツサホイールを
備える回転軸，該回転軸を前記ハウジング内に回
転自在に軸支する軸受用浮動ブツシユ、前記ハウ
ジングに夫々設けられる潤滑油入口と潤滑油出
口、及び該入口と出口を連結する潤滑油通路を有
し、該潤滑油通路は、前記浮動ブツシユの外周側
と内周側を連結するよう浮動ブツシユの回転方向
に向つて内周側から外周側へ傾斜して設けられる
油穴を含むターボチヤージヤの軸受機構。 a housing; a rotating shaft disposed within the housing and having a turbine wheel located in the exhaust passage at one end and a compressor wheel located in the intake passage at the other end; the rotating shaft being rotatably mounted within the housing; The housing has a floating bush for a bearing, a lubricating oil inlet and a lubricating oil outlet respectively provided in the housing, and a lubricating oil passage connecting the inlet and the outlet, and the lubricating oil passage is connected to an outer peripheral side and an inner side of the floating bush. A bearing mechanism for a turbocharger that includes an oil hole that is inclined from the inner circumferential side to the outer circumferential side in the direction of rotation of the floating bushing so as to connect the circumferential sides.