JP2013124679A - Rolling bearing device - Google Patents

Rolling bearing device Download PDF

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JP2013124679A
JP2013124679A JP2011272021A JP2011272021A JP2013124679A JP 2013124679 A JP2013124679 A JP 2013124679A JP 2011272021 A JP2011272021 A JP 2011272021A JP 2011272021 A JP2011272021 A JP 2011272021A JP 2013124679 A JP2013124679 A JP 2013124679A
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peripheral surface
spacer member
outer peripheral
bearing housing
rolling
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JP5910058B2 (en
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Fumihiro Furukawa
史洋 古川
孝 ▲すぎ▼本
Takashi Sugimoto
Kunihiro Yamaguchi
晋弘 山口
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JTEKT Corp
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JTEKT Corp
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    • 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
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
    • F16C19/548—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings in O-arrangement
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • 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
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • 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
    • F16C2360/23—Gas turbine engines
    • F16C2360/24—Turbochargers
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6685—Details of collecting or draining, e.g. returning the liquid to a sump

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing device capable of inducing lubricating oil attached on an outer peripheral surface of a spacer member toward a discharge hole in a lower part of a bearing housing.SOLUTION: The device comprises a bearing housing 10, first and second both rolling bearings 20, 30 assembled in both housing parts 11, 12 of the bearing housing 10 and arranged on an axis of a rotary shaft 3 with a prescribed interval, and a cylindrical spacer member 40 arranged between the first and second both rolling bearings 20, 30 and provided with a center hole into which the rotary shaft 3 is inserted. A discharge hole 16 for lubricating oil is formed in a part situated between the first and second both rolling bearings 20, 30 in the lower part of the bearing housing 10. An outer peripheral surface 41 of the spacer member 40 has both ends thereof formed into an outer diameter dimension close to an outer peripheral dimension of ends of respective inner rings 21, 31 in the both first and second both rolling bearings 20, 30, and is formed in a tapered diameter expanded gradually toward the discharge hole 16 from both ends.

Description

この発明は転がり軸受装置に関する。   The present invention relates to a rolling bearing device.

従来、例えば、ターボチャージャーの回転軸を回転可能に支持するために、図３に示すように、内周面の両端部にハウジング部１１１、１１２を有する軸受ハウジング１１０と、この軸受ハウジング１１０の両ハウジング部１１１、１１２に組み込まれ、かつ回転軸１０３の軸上に所定の間隔を隔てて配設される第１、第２の両転がり軸受１２０、１３０と、これら第１、第２の両転がり軸受１２０、１３０の間に配設され、かつ回転軸１０３が挿通される中心孔を有して円筒状をなすスペーサ部材１４０とを備えた転がり軸受装置が知られている。
このような転がり軸受装置においては、軸受ハウジング１１０に設けられた油路１１３（ノズル孔１１４及び油溝１１５）から第１、第２の両転がり軸受１２０、１３０に向けて潤滑油が強制的に供給される。
そして、第１、第２の両転がり軸受１２０、１３０に供給された潤滑油は、軸受ハウジング１１０の下部に形成された排出孔１１６から排出される。
また、スペーサ部材１４０は、その外周面の両端部に形成された面取り部１４０ａを除く部分の外径寸法は同等で平行筒（円筒面）をなしている。
なお、潤滑油を速やかに外部に排出させるために、例えば、特許文献１に開示されているように、内輪の一側にテーパ部材が配置され、このテーパ部材の外周面の一端が内輪の外径と同等で、かつテーパ部材の外周面の一端から他端に向かって外径が大きくなるテーパ状に形成された転がり軸受装置が知られている。 Conventionally, for example, in order to rotatably support a rotating shaft of a turbocharger, as shown in FIG. 3, as shown in FIG. First and second rolling bearings 120 and 130 incorporated in the housing portions 111 and 112 and disposed at a predetermined interval on the axis of the rotating shaft 103, and the first and second rolling elements. A rolling bearing device is known that includes a spacer member 140 that is disposed between the bearings 120 and 130 and that has a central hole through which the rotating shaft 103 is inserted and has a cylindrical shape.
In such a rolling bearing device, the lubricating oil is forced from the oil passage 113 (nozzle hole 114 and oil groove 115) provided in the bearing housing 110 toward the first and second rolling bearings 120 and 130. Supplied.
The lubricating oil supplied to the first and second rolling bearings 120 and 130 is discharged from a discharge hole 116 formed in the lower portion of the bearing housing 110.
In addition, the spacer member 140 has a parallel cylinder (cylindrical surface) with the same outer diameter dimension except for the chamfered portions 140a formed at both ends of the outer peripheral surface thereof.
In order to quickly discharge the lubricating oil to the outside, for example, as disclosed in Patent Document 1, a tapered member is disposed on one side of the inner ring, and one end of the outer peripheral surface of the tapered member is outside the inner ring. 2. Description of the Related Art A rolling bearing device is known that is formed in a tapered shape that has an outer diameter that is equal to the diameter and that increases from one end to the other end of an outer peripheral surface of a tapered member.

特開２００９−１２１５７５号公報JP 2009-121575 A

ところで、図３に示す従来のスペーサ部材１４０は、その外周面の両端部に形成された面取り部１４０ａを除く部分の外径寸法は同等で平行筒をなしている。
このため、軸受ハウジング１１０の油路１１３（ノズル孔１１４及び油溝１１５）から第１、第２の両転がり軸受１２０、１３０に向けて強制的に供給された潤滑油の一部がスペーサ部材１４０の外周面に付着すると、その潤滑油は、スペーサ部材１４０の外周面に付着したまま滞留するか、あるいは、スペーサ部材１４０の回転による遠心力の作用を受けて軸受ハウジング１１０の内周壁面に向けて飛ばされる。
このようなことから、第１、第２の両転がり軸受１２０、１３０内に必要以上の潤滑油が供給されて滞留される場合があり、潤滑油の攪拌抵抗が増大してトルク損失をまねくことがある。 Incidentally, the conventional spacer member 140 shown in FIG. 3 has the same outer diameter size except for the chamfered portions 140a formed at both ends of the outer peripheral surface thereof, and forms a parallel cylinder.
For this reason, a part of the lubricating oil forcibly supplied from the oil passage 113 (nozzle hole 114 and oil groove 115) of the bearing housing 110 toward the first and second rolling bearings 120, 130 is part of the spacer member 140. The lubricant oil stays attached to the outer peripheral surface of the spacer member 140 or is applied to the inner peripheral wall surface of the bearing housing 110 due to the centrifugal force due to the rotation of the spacer member 140. Will be skipped.
For this reason, excessive lubricating oil may be supplied and retained in both the first and second rolling bearings 120 and 130, increasing the stirring resistance of the lubricating oil and causing torque loss. There is.

この発明の目的は、前記問題点に鑑み、スペーサ部材の外周面に付着した潤滑油を軸受ハウジングの下部の排出孔に向けて誘導することができる転がり軸受装置を提供することである。   In view of the above problems, an object of the present invention is to provide a rolling bearing device capable of guiding the lubricating oil adhering to the outer peripheral surface of the spacer member toward the discharge hole at the lower portion of the bearing housing.

前記課題を解決するために、この発明の請求項１に係る転がり軸受装置は、内周面の両端部にハウジング部を有する軸受ハウジングと、この軸受ハウジングの両ハウジング部に組み込まれ、かつ回転軸の軸上に所定の間隔を隔てて配設される第１、第２の両転がり軸受と、これら第１、第２の両転がり軸受の間に配設され、かつ前記回転軸が挿通される中心孔を有して円筒状をなすスペーサ部材とを備え、前記軸受ハウジングの下部の前記第１、第２の両転がり軸受の間に位置する部分に潤滑油の排出孔が形成された転がり軸受装置であって、
前記スペーサ部材の外周面は、その両端部が前記第１、第２の両転がり軸受の各内輪の端部外周面に近い外径寸法に形成されると共に、前記両端部から前記排出孔に向けて徐々に大径に形成されたテーパ状に形成されていることを特徴とする。 In order to solve the above-mentioned problems, a rolling bearing device according to a first aspect of the present invention includes a bearing housing having housing portions at both ends of the inner peripheral surface, both housing portions of the bearing housing, and a rotating shaft. The first and second rolling bearings disposed on the shaft at a predetermined interval and the first and second rolling bearings are disposed between the first and second rolling bearings. A rolling bearing in which a lubricating oil discharge hole is formed in a portion located between the first and second rolling bearings at the lower part of the bearing housing. A device,
The outer peripheral surface of the spacer member is formed to have an outer diameter that is close to the outer peripheral surface of the end of each inner ring of the first and second rolling bearings, and from both ends to the discharge hole. It is characterized by being formed into a taper shape gradually formed with a large diameter.

前記構成によると、スペーサ部材の外周面の両端部あるいはその近傍に付着した潤滑油は、スペーサ部材の回転による遠心力の作用を受けると、スペーサ部材の外周面の端部から最大径となる部分、すなわち排出孔の上方に対応する部分に向けて誘導されて流れる。
これによって、スペーサ部材の外周面の両端部あるいはその近傍に付着した潤滑油を排出孔から迅速に排出することが可能となる。
このため、第１、第２の両転がり軸受内に必要以上の潤滑油が滞留されることを防止することができ、潤滑油の攪拌抵抗の増大によるトルク損失を抑制することができる。 According to the above configuration, the lubricating oil adhering to both ends of the outer peripheral surface of the spacer member or the vicinity thereof is a portion having the maximum diameter from the end portion of the outer peripheral surface of the spacer member when subjected to the centrifugal force due to the rotation of the spacer member. That is, it is guided and flows toward the portion corresponding to the upper side of the discharge hole.
As a result, the lubricating oil adhering to both ends of the outer peripheral surface of the spacer member or in the vicinity thereof can be quickly discharged from the discharge hole.
For this reason, it is possible to prevent excessive lubricating oil from staying in both the first and second rolling bearings and to suppress torque loss due to an increase in the stirring resistance of the lubricating oil.

請求項２に係る転がり軸受装置は、請求項１に記載の転がり軸受装置であって、
軸受ハウジングの排出孔は、第１、第２の両転がり軸受の間の中間に配設され、
スペーサ部材の外周面は、その両端部から軸方向中央部に向けてテーパ角度が徐々に緩められたクラウニング形状をなしていることを特徴とする。 The rolling bearing device according to claim 2 is the rolling bearing device according to claim 1,
The discharge hole of the bearing housing is disposed in the middle between the first and second rolling bearings,
The outer peripheral surface of the spacer member has a crowning shape in which the taper angle is gradually loosened from the both end portions toward the axial center portion.

前記構成によると、スペーサ部材の外周面がクラウニング形状をなすことによって、スペーサ部材の外周面の両端部あるいはその近傍に付着した潤滑油は、スペーサ部材の外周面の両端部から軸方向中央部に向けて円滑に誘導されて流れる。そして、スペーサ部材の外周面の軸方向中央部に達した潤滑油は、排出孔に向けて流れて排出される。   According to the above configuration, the outer peripheral surface of the spacer member forms a crowning shape, so that the lubricating oil adhering to both end portions of the outer peripheral surface of the spacer member or the vicinity thereof is shifted from the both end portions of the outer peripheral surface of the spacer member to the axial center portion. It is guided smoothly and flows. Then, the lubricating oil that has reached the central portion in the axial direction of the outer peripheral surface of the spacer member flows toward the discharge hole and is discharged.

この発明の実施例１に係る転がり軸受装置がターボチャージャーに組み付けられた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state with which the rolling bearing apparatus which concerns on Example 1 of this invention was assembled | attached to the turbocharger. 図１に記載の転がり軸受装置を拡大して示す縦断面図である。It is a longitudinal cross-sectional view which expands and shows the rolling bearing apparatus described in FIG. 従来の転がり軸受装置を拡大して示す縦断面図である。It is a longitudinal cross-sectional view which expands and shows the conventional rolling bearing apparatus.

この発明を実施するための形態について実施例にしたがって説明する。   A mode for carrying out the present invention will be described in accordance with an embodiment.

この発明の実施例１を図１と図２にしたがって説明する。
図１と図２に示すように、ターボチャージャの回転軸３を回転可能に支持する転がり軸受装置は、軸受ハウジング１０と、第１、第２の両転がり軸受２０、３０と、スペーサ部材４０とを備える。 A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the rolling bearing device that rotatably supports the rotating shaft 3 of the turbocharger includes a bearing housing 10, first and second rolling bearings 20 and 30, a spacer member 40, and the like. Is provided.

軸受ハウジング１０は筒状に形成され、ターボチャージャーの本体ケース１に形成された軸受ハウジング組付部２に挿入されて装着される。
図２に示すように、軸受ハウジング１０の内周面の両端部には、第１、第２の両転がり軸受２０、３０がそれぞれ嵌込まれるハウジング部１１、１２が形成されている。
また、軸受ハウジング１０の外周面の両端部寄り部分には、縦断面Ｖ溝状の環状溝１７、１８がそれぞれ形成されている。 The bearing housing 10 is formed in a cylindrical shape, and is inserted and mounted in a bearing housing assembly portion 2 formed in the main body case 1 of the turbocharger.
As shown in FIG. 2, housing portions 11 and 12 into which the first and second rolling bearings 20 and 30 are fitted are formed at both ends of the inner peripheral surface of the bearing housing 10.
Further, annular grooves 17 and 18 each having a V-shaped longitudinal section are formed in the portions near both ends of the outer peripheral surface of the bearing housing 10.

軸受ハウジング１０には、第１、第２の両転がり軸受２０、３０に対し潤滑油を強制的に供給する油路１３がそれぞれ形成されている。
この実施例１において、図２に示すように、第１の転がり軸受２０に対する油路１３は、軸受ハウジング１０の内部側から第１の転がり軸受２０に潤滑油を供給するために、軸受ハウジング１０の外周面の環状溝１７から軸受ハウジング１０の内周面にわたって貫設され、かつ軸受ハウジング１０の内周面側が小径に絞られたノズル孔１４によって構成されている。
また、第２の転がり軸受３０に対する油路１３は、軸受ハウジング１０の外部側から第２の転がり軸受３０に潤滑油を供給するために、軸受ハウジング１０の他端面の径方向に沿って形成された油溝１５によって形成されている。
また、軸受ハウジング１０の下部の両ハウジング部１１、１２の間に位置する部分（この実施例１では中央部）に潤滑油の排出孔１６が形成されている。 In the bearing housing 10, oil passages 13 for forcibly supplying lubricating oil to the first and second rolling bearings 20 and 30 are formed.
In the first embodiment, as shown in FIG. 2, the oil passage 13 for the first rolling bearing 20 is supplied to the first rolling bearing 20 from the inside of the bearing housing 10 in order to supply the lubricating oil to the bearing housing 10. This is formed by a nozzle hole 14 penetrating from the annular groove 17 on the outer peripheral surface to the inner peripheral surface of the bearing housing 10 and the inner peripheral surface side of the bearing housing 10 being narrowed to a small diameter.
Further, the oil passage 13 with respect to the second rolling bearing 30 is formed along the radial direction of the other end surface of the bearing housing 10 in order to supply the lubricating oil to the second rolling bearing 30 from the outside of the bearing housing 10. The oil groove 15 is formed.
Further, a lubricating oil discharge hole 16 is formed in a portion (a central portion in the first embodiment) located between the housing portions 11 and 12 at the lower portion of the bearing housing 10.

第１の転がり軸受２０は、内輪２１と、外輪２２と、これら内・外輪２１、２２の間の環状空間に保持器２４によって保持された状態で転動可能に配設される複数の転動体（図では玉）２３とを備える。
また、第２の転がり軸受３０は、第１の転がり軸受２０と同一形状大きさに形成された内輪３１と、外輪３２と、複数の転動体３３と保持器３４とを備える。
そして、第１、第２の両転がり軸受２０、３０は、各内輪３１の間にスペーサ部材４０が配設された状態で、各外輪２２、３２が軸受ハウジング１０のハウジング部１１、１２に嵌挿（圧入）されて固定される。 The first rolling bearing 20 includes a plurality of rolling elements that are arranged to be able to roll while being held in a ring space between an inner ring 21, an outer ring 22, and the inner and outer rings 21, 22 by a cage 24. (A ball in the figure) 23.
Further, the second rolling bearing 30 includes an inner ring 31 formed in the same shape and size as the first rolling bearing 20, an outer ring 32, a plurality of rolling elements 33, and a cage 34.
In the first and second rolling bearings 20 and 30, the outer rings 22 and 32 are fitted in the housing portions 11 and 12 of the bearing housing 10 with the spacer member 40 disposed between the inner rings 31. Inserted (press-fit) and fixed.

スペーサ部材４０は、回転軸３が挿通可能な中心孔を有する円筒状に形成されている。このスペーサ部材４０の外周面４１は、その両端部が第１、第２の両転がり軸受２０、３０のの各内輪２１、３１の端部外周面に近い外径寸法に形成されると共に、両端部から軸受ハウジング１０の排出孔１６に向けて徐々に大径に形成されたテーパ状に形成されている。
この実施例１において、軸受ハウジング１０の排出孔１６は、第１、第２の両転がり軸受２０、３０の間の中間に配設される。
そして、スペーサ部材４０の外周面４１は、その両端部から軸方向中央部に向けてテーパ角度が徐々に緩められたクラウニング形状をなしている。 The spacer member 40 is formed in a cylindrical shape having a central hole through which the rotary shaft 3 can be inserted. The outer peripheral surface 41 of the spacer member 40 is formed so that both end portions thereof have outer diameters close to the outer peripheral surface of the end portions of the inner rings 21 and 31 of the first and second rolling bearings 20 and 30, and The taper is formed in a tapered shape that gradually increases in diameter from the portion toward the discharge hole 16 of the bearing housing 10.
In the first embodiment, the discharge hole 16 of the bearing housing 10 is disposed in the middle between the first and second rolling bearings 20 and 30.
The outer peripheral surface 41 of the spacer member 40 has a crowning shape in which the taper angle is gradually relaxed from the both end portions toward the central portion in the axial direction.

なお、軸受ハウジング１０のハウジング部１１、１２に第１、第２の両転がり軸受２０、３０がスペーサ部材４０を介してそれぞれ嵌込まれ、その後、軸受ハウジング１０が、ターボチャージャーの本体ケース１の軸受ハウジング組付部２に組み込まれる。
その後、回転軸３が、第１の転がり軸受２０の内輪２１と、スペーサ部材４０と、第２の転がり軸受３０の内輪３１との順に嵌挿されて組み付けられる。これによって、回転軸３の軸上に所定の間隔を隔てて第１、第２の両転がり軸受２０、３０が配設される。
また、周知のように、回転軸３１の一端部にはタービンホイール４が装着され、同回転軸３１の他端部にはコンプレッサインペラ７が装着される。 The first and second rolling bearings 20 and 30 are respectively fitted into the housing portions 11 and 12 of the bearing housing 10 via the spacer member 40, and then the bearing housing 10 is attached to the turbocharger main body case 1. It is incorporated in the bearing housing assembly 2.
Thereafter, the rotating shaft 3 is fitted and assembled in the order of the inner ring 21 of the first rolling bearing 20, the spacer member 40, and the inner ring 31 of the second rolling bearing 30. Thus, the first and second rolling bearings 20 and 30 are disposed on the axis of the rotating shaft 3 at a predetermined interval.
As is well known, the turbine wheel 4 is attached to one end of the rotating shaft 31, and the compressor impeller 7 is attached to the other end of the rotating shaft 31.

この実施例１に係る転がり軸受装置は上述したように構成される。
したがって、ターボチャージャーの作動時には、軸受ハウジング１０の油路１３としてのノズル孔１４と、油溝１５とにそれぞれ供給される潤滑油が第１、第２の両転がり軸受２０、３０に向けて強制的に供給される。
前記潤滑油のうち、一部の潤滑油がスペーサ部材４０の外周面４１に付着することがある。
スペーサ部材４０の外周面４１の両端部あるいはその近傍に付着した潤滑油がスペーサ部材４０の回転による遠心力の作用を受けると、スペーサ部材４０の外周面４１の端部から最大径となる部分、すなわち、軸受ハウジング１０の排出孔１６の上方に対応する部分に向けて誘導されて流れる。
これによって、スペーサ部材４０の外周面４１の両端部あるいはその近傍に付着した潤滑油を排出孔１６から迅速に排出することが可能となる。
このため、第１、第２の両転がり軸受２０、３０内に必要以上の潤滑油が滞留されることを防止することができ、潤滑油の攪拌抵抗の増大によるトルク損失を抑制することができる。 The rolling bearing device according to the first embodiment is configured as described above.
Therefore, during the operation of the turbocharger, the lubricating oil supplied to the nozzle hole 14 as the oil passage 13 of the bearing housing 10 and the oil groove 15 is forcibly directed toward the first and second rolling bearings 20 and 30. Supplied.
A part of the lubricating oil may adhere to the outer peripheral surface 41 of the spacer member 40.
When the lubricating oil adhering to both ends of the outer peripheral surface 41 of the spacer member 40 or the vicinity thereof is subjected to the action of centrifugal force due to the rotation of the spacer member 40, the portion having the maximum diameter from the end of the outer peripheral surface 41 of the spacer member 40 That is, it flows while being guided toward a portion corresponding to the upper side of the discharge hole 16 of the bearing housing 10.
As a result, the lubricating oil adhering to or near both ends of the outer peripheral surface 41 of the spacer member 40 can be quickly discharged from the discharge hole 16.
For this reason, it is possible to prevent excessive lubricating oil from staying in both the first and second rolling bearings 20 and 30 and to suppress torque loss due to increase in the stirring resistance of the lubricating oil. .

この実施例１において、スペーサ部材４０の外周面４１がクラウニング形状をなすことによって、図２の矢印で示すように、スペーサ部材４０の外周面４１の両端部あるいはその近傍に付着した潤滑油は、スペーサ部材４０の外周面４１の両端部から軸方向中央部に向けて円滑に誘導されて流れる。そして、スペーサ部材４０の外周面４１の軸方向中央部に達した潤滑油は、軸受ハウジング１０の排出孔１６に向けて流れて排出される。   In the first embodiment, when the outer peripheral surface 41 of the spacer member 40 has a crowning shape, as shown by the arrows in FIG. 2, the lubricating oil adhering to both ends of the outer peripheral surface 41 of the spacer member 40 or the vicinity thereof is The spacer member 40 is smoothly guided from both end portions of the outer peripheral surface 41 toward the central portion in the axial direction and flows. Then, the lubricating oil that has reached the central portion in the axial direction of the outer peripheral surface 41 of the spacer member 40 flows toward the discharge hole 16 of the bearing housing 10 and is discharged.

なお、この発明は前記実施例１に限定するものではなく、この発明の要旨を逸脱しない範囲内において、種々なる形態で実施することもできる。
例えば、前記実施例１においては、ターボチャージャーの本体ケース１と、軸受ハウジング１０とがそれぞれ個別に製作されて一体状に組み付けられる場合を例示したが、ターボチャージャーの本体ケース１と軸受ハウジング１０とが一体をなして一部品で構成される場合においてもこの発明を実施することができる。
また、前記実施例１において、第１の転がり軸受２０に対する油路１３が軸受ハウジング１０の内部側から第１の転がり軸受２０に潤滑油を供給するノズル孔１４によって構成され、第２の転がり軸受３０に対する油路１３が軸受ハウジング１０の他端面の径方向に沿って形成された油溝１５によって形成される場合を例示したが、第２の転がり軸受３０に対する油路１３を軸受ハウジング１０の内部側から第２の転がり軸受３０に潤滑油を供給するノズル孔によって構成されてもよい。
また、第１の転がり軸受２０に対する油路１３が軸受ハウジング１０の一端面の径方向に沿って形成される油溝によって構成されてもよい。
また、ターボチャージャー以外の転がり軸受装置としても使用することが可能である。 In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can also be implemented with a various form.
For example, in the first embodiment, the case where the main body case 1 of the turbocharger and the bearing housing 10 are individually manufactured and assembled together is illustrated, but the main body case 1 of the turbocharger and the bearing housing 10 are The present invention can be carried out even when are integrated into a single part.
In the first embodiment, the oil passage 13 with respect to the first rolling bearing 20 is constituted by the nozzle hole 14 that supplies the lubricating oil to the first rolling bearing 20 from the inner side of the bearing housing 10, and the second rolling bearing. Although the case where the oil passage 13 with respect to 30 is formed by the oil groove 15 formed along the radial direction of the other end surface of the bearing housing 10 is illustrated, the oil passage 13 with respect to the second rolling bearing 30 is provided inside the bearing housing 10. It may be constituted by a nozzle hole that supplies lubricant to the second rolling bearing 30 from the side.
Further, the oil passage 13 with respect to the first rolling bearing 20 may be constituted by an oil groove formed along the radial direction of the one end face of the bearing housing 10.
It can also be used as a rolling bearing device other than a turbocharger.

３ 回転軸
１０ 軸受ハウジング
１１、１２ ハウジング部
１３ 油路
１４ ノズル孔（油路）
１５ 油溝（油路）
２０ 第１の転がり軸受
３０ 第２の転がり軸受
４０ スペーサ部材 3 Rotating shaft 10 Bearing housing 11, 12 Housing part 13 Oil passage 14 Nozzle hole (oil passage)
15 Oil groove (oil passage)
20 1st rolling bearing 30 2nd rolling bearing 40 Spacer member

Claims (2)

内周面の両端部にハウジング部を有する軸受ハウジングと、この軸受ハウジングの両ハウジング部に組み込まれ、かつ回転軸の軸上に所定の間隔を隔てて配設される第１、第２の両転がり軸受と、これら第１、第２の両転がり軸受の間に配設され、かつ前記回転軸が挿通される中心孔を有して円筒状をなすスペーサ部材とを備え、前記軸受ハウジングの下部の前記第１、第２の両転がり軸受の間に位置する部分に潤滑油の排出孔が形成された転がり軸受装置であって、
前記スペーサ部材の外周面は、その両端部が前記第１、第２の両転がり軸受の各内輪の端部外周面に近い外径寸法に形成されると共に、前記両端部から前記排出孔に向けて徐々に大径に形成されたテーパ状に形成されていることを特徴とする転がり軸受装置。 A bearing housing having housing portions at both ends of the inner peripheral surface, and both first and second shafts incorporated in both housing portions of the bearing housing and disposed on the axis of the rotating shaft at a predetermined interval A rolling bearing, and a cylindrical spacer member disposed between the first and second rolling bearings and having a center hole through which the rotating shaft is inserted. A rolling bearing device in which a lubricating oil discharge hole is formed in a portion located between the first and second rolling bearings.
The outer peripheral surface of the spacer member is formed to have an outer diameter that is close to the outer peripheral surface of the end of each inner ring of the first and second rolling bearings, and from both ends to the discharge hole. A rolling bearing device characterized by being formed into a tapered shape having a gradually increased diameter. 請求項１に記載の転がり軸受装置であって、
軸受ハウジングの排出孔は、第１、第２の両転がり軸受の間の中間に配設され、
スペーサ部材の外周面は、その両端部から軸方向中央部に向けてテーパ角度が徐々に緩められたクラウニング形状をなしていることを特徴とする転がり軸受装置。 The rolling bearing device according to claim 1,
The discharge hole of the bearing housing is disposed in the middle between the first and second rolling bearings,
A rolling bearing device characterized in that the outer peripheral surface of the spacer member has a crowning shape in which the taper angle is gradually relaxed from the both end portions toward the central portion in the axial direction.
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Cited By (2)

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FR3020102A1 (en) * 2014-04-18 2015-10-23 Skf Ab BEARING, IN PARTICULAR FOR TURBOCHARGER
FR3020103A1 (en) * 2014-04-18 2015-10-23 Skf Ab BEARING MODULE, IN PARTICULAR FOR A TURBOCHARGER

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CN109185344A (en) * 2018-09-14 2019-01-11 贵州元诚实业有限公司 A kind of bearing arrangement and the fuel supply method applied to bearing arrangement
US11536159B1 (en) * 2021-12-17 2022-12-27 Borgwarner Inc. Bearing assembly for supporting rotation of a shaft in a turbocharger

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JP2011137395A (en) * 2009-12-28 2011-07-14 Jtekt Corp Bearing device for turbocharger

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JP2011137395A (en) * 2009-12-28 2011-07-14 Jtekt Corp Bearing device for turbocharger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3020102A1 (en) * 2014-04-18 2015-10-23 Skf Ab BEARING, IN PARTICULAR FOR TURBOCHARGER
FR3020103A1 (en) * 2014-04-18 2015-10-23 Skf Ab BEARING MODULE, IN PARTICULAR FOR A TURBOCHARGER

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