JP2000092777A - Support structure for bearing in rotating machine - Google Patents
Support structure for bearing in rotating machineInfo
- Publication number
- JP2000092777A JP2000092777A JP10259800A JP25980098A JP2000092777A JP 2000092777 A JP2000092777 A JP 2000092777A JP 10259800 A JP10259800 A JP 10259800A JP 25980098 A JP25980098 A JP 25980098A JP 2000092777 A JP2000092777 A JP 2000092777A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- insert member
- ball bearing
- rotating machine
- bracket
- 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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/07—Fixing them on the shaft or housing with interposition of an element
- F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
-
- 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
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
- F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は回転機の軸受支持構
造、特にアルミニウムダイカスト製ブラケットに支持さ
れるボールベアリングのクリープの発生を抑制する構造
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing support structure for a rotating machine, and more particularly to a structure for suppressing the occurrence of creep of a ball bearing supported by an aluminum die-cast bracket.
【０００２】[0002]
【従来の技術】従来、回転機の回転子の軸受けは、ブラ
ケットにハウジングボアを形成し、ボールベアリングを
圧入して支持する構造が既に知られている。2. Description of the Related Art Conventionally, a bearing for a rotor of a rotating machine has a structure in which a housing bore is formed in a bracket and a ball bearing is press-fitted and supported.
【０００３】[0003]
【発明が解決しようとする課題】従来のブラケットにハ
ウジングボアを形成し、ボールベアリングを圧入して支
持する構造は、ボールベアリングの外輪が空回りする現
象、即ち「クリープ」する場合がある。このため、ボー
ルベアリングの外輪と、ハウジングボアの寸法を正確に
確保しなけれならないという問題がある。In a conventional structure in which a housing bore is formed in a bracket and a ball bearing is press-fitted and supported, the outer ring of the ball bearing may run idle, that is, "creep". For this reason, there is a problem that the dimensions of the outer race of the ball bearing and the housing bore must be secured accurately.
【０００４】本発明は、かかる事情に鑑みてなされたも
のであり、ボールベアリングの外輪がクリープしない回
転機の軸受支持構造を提供することを目的とする。The present invention has been made in view of such circumstances, and has as its object to provide a bearing support structure for a rotating machine in which the outer ring of a ball bearing does not creep.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
に、本発明は、ボールベアリングを包囲する略円筒状鉄
製インサート部材をブラケットに鋳込んで一体に成形
し、さらにインサート部材外周のブラケットの軸方向面
に円周状溝部を形成し、この溝部とインサート部材間の
薄肉部により、鋳込み時のインサート部材に加わる初期
応力を小さくし、ベアリングハウジング部の熱膨張率の
調整をするという技術手段を採用した。In order to solve the above-mentioned problems, the present invention provides a substantially cylindrical iron insert member surrounding a ball bearing, which is cast into a bracket and integrally formed. Technical Means of Forming a Circumferential Groove on an Axial Surface, Using a Thin Portion between the Groove and the Insert Member to Reduce Initial Stress Applied to the Insert Member During Casting and Adjust the Thermal Expansion Coefficient of the Bearing Housing It was adopted.
【０００６】[0006]
【発明の実施の形態】以下、本発明の実施の形態を、添
付図面に示した本発明の一実施例に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.
【０００７】図１は本発明の一実施例を示す回転機の軸
受支持構造の要部断面図である。FIG. 1 is a sectional view of a main part of a bearing support structure for a rotating machine according to an embodiment of the present invention.
【０００８】図１において、回転機のブラケット１はア
ルミニウムダイカスト製であり、ベアリングハウジング
部２に略円筒形状のリング状鉄製インサート部材３を鋳
込んで作製される。回転機の組立時にはベアリングハウ
ジング部２にボールベアリング４の外輪が圧入され、そ
の内輪には回転子軸５が圧入されている。なお、スリッ
プリングＳが回転子軸５に固定されている。In FIG. 1, a bracket 1 of a rotating machine is made of aluminum die-casting, and is manufactured by casting a substantially cylindrical ring-shaped iron insert member 3 into a bearing housing 2. When assembling the rotating machine, the outer ring of the ball bearing 4 is press-fitted into the bearing housing portion 2, and the rotor shaft 5 is press-fitted into the inner ring. Note that the slip ring S is fixed to the rotor shaft 5.
【０００９】鉄製インサート部材３の外周側のブラケッ
ト１の軸方向面には、円周状溝部６が設けられており、
溝部６と鉄製インサート部材３間には、薄肉部７が形成
される。この薄肉部７は鋳込み時に鉄製インサート部材
３に初期応力が加わってベアリングハウジング部２の熱
膨張がほぼアルミニウムの熱膨張と同じに広がり、温度
上昇時の締め代が変化するのを防止するために設けられ
るものである。A circumferential groove 6 is provided in the axial surface of the bracket 1 on the outer peripheral side of the iron insert member 3.
A thin portion 7 is formed between the groove 6 and the iron insert member 3. The thin-walled portion 7 prevents initial stress from being applied to the iron insert member 3 at the time of casting, so that the thermal expansion of the bearing housing portion 2 spreads almost the same as that of aluminum, and the interference at the time of temperature rise does not change. It is provided.
【００１０】図２はボールベアリング４の温度変化に対
するボールベアリング４と外輪鉄製インサート部材３の
締め代の変化を示したものである。従来の技術では、温
度上昇に従って、締め代がゆるみ方向に拡大するのに対
して、本実施例では、締め代はほぼ一定となっている。FIG. 2 shows a change in interference between the ball bearing 4 and the insert member 3 made of the outer race iron with respect to a change in the temperature of the ball bearing 4. In the related art, the interference increases in the loosening direction as the temperature increases, whereas in the present embodiment, the interference is substantially constant.
【００１１】従って、薄肉部７で鋳込み時の鉄製インサ
ート部材３に加わるアルミニウムの初期応力を小さく
し、ベアリングハウジング部２の熱膨張率の調整をする
ことが可能となる。この熱膨張率を適正な値にすること
により、回転時の温度上昇時のベアリングハウジング部
２とボールベアリング４間の締め代を確保することがで
き、クリープを防止することができる。Therefore, the initial stress of aluminum applied to the iron insert member 3 at the time of casting in the thin portion 7 can be reduced, and the coefficient of thermal expansion of the bearing housing portion 2 can be adjusted. By setting the coefficient of thermal expansion to an appropriate value, the interference between the bearing housing portion 2 and the ball bearing 4 when the temperature rises during rotation can be secured, and creep can be prevented.
【００１２】[0012]
【発明の効果】本発明においては、ボールベアリングを
包囲する略円筒状鉄製インサート部材をブラケットに鋳
込んで一体に成形し、さらにインサート部材外周のブラ
ケットの軸方向面に円周状溝部を形成し、この溝部とイ
ンサート部材間の薄肉部により、鋳込み時のインサート
部材に加わる初期応力を小さくし、ベアリングハウジン
グ部の熱膨張率の調整をする構造としたので、回転時の
温度上昇時のベアリングハウジング部とボールベアリン
グ間の締め代を確保することができ、クリープを防止す
る回転機の軸受支持構造を提供することができる。According to the present invention, a substantially cylindrical iron insert member surrounding a ball bearing is cast into a bracket and integrally formed, and further, a circumferential groove is formed in an axial surface of the bracket on the outer periphery of the insert member. The thin portion between the groove and the insert member reduces the initial stress applied to the insert member during casting, and adjusts the coefficient of thermal expansion of the bearing housing. The interference between the portion and the ball bearing can be secured, and a bearing support structure for a rotating machine that prevents creep can be provided.
【図１】本発明の実施の形態を示す回転機の軸受支持構
造の要部断面図である。FIG. 1 is a sectional view of a main part of a bearing support structure for a rotating machine according to an embodiment of the present invention.
【図２】ボールベアリング温度と締め代の変化を示す説
明図である。FIG. 2 is an explanatory diagram showing changes in ball bearing temperature and interference.
１・・・ブラケット ２・・・ベアリングハウジング部 ３・・・インサート部材 ４・・・ボールベアリング ５・・・回転子軸 ６・・・溝部 ７・・・薄肉部 DESCRIPTION OF SYMBOLS 1 ... Bracket 2 ... Bearing housing part 3 ... Insert member 4 ... Ball bearing 5 ... Rotor shaft 6 ... Groove part 7 ... Thin part
Claims (1)
ト製ブラケット（１）に備えられるボールベアリング
（４）によって支持される回転機の軸受支持構造におい
て、前記ボールベアリング（４）を包囲する略円筒状鉄
製インサート部材（３）を前記ブラケット（１）に鋳込
んで一体に成形し、さらに前記インサート部材（３）外
周の前記ブラケット（１）の軸方向面に円周状溝部
（６）を形成し、該溝部（６）と前記インサート部材
（３）間の薄肉部（７）により、鋳込み時の前記インサ
ート部材（３）に加わる初期応力を小さくし、ベアリン
グハウジング部（２）の熱膨張率の調整をすることを特
徴とする回転機の軸受支持構造。1. A bearing structure for a rotating machine in which a rotor shaft (5) is supported by a ball bearing (4) provided on an aluminum die-cast bracket (1), a substantially cylindrical shape surrounding the ball bearing (4). An iron-shaped insert member (3) is cast into the bracket (1) to be integrally formed, and a circumferential groove (6) is formed on the outer peripheral surface of the insert member (3) in the axial direction of the bracket (1). The thin portion (7) between the groove (6) and the insert member (3) reduces the initial stress applied to the insert member (3) during casting, and reduces the coefficient of thermal expansion of the bearing housing (2). A bearing support structure for a rotating machine, characterized in that the adjustment is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10259800A JP2000092777A (en) | 1998-09-14 | 1998-09-14 | Support structure for bearing in rotating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10259800A JP2000092777A (en) | 1998-09-14 | 1998-09-14 | Support structure for bearing in rotating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000092777A true JP2000092777A (en) | 2000-03-31 |
Family
ID=17339184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10259800A Pending JP2000092777A (en) | 1998-09-14 | 1998-09-14 | Support structure for bearing in rotating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000092777A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012005273A (en) * | 2010-06-18 | 2012-01-05 | Ihi Corp | Bearing retaining structure of steam turbine power generator |
| JP2014107973A (en) * | 2012-11-28 | 2014-06-09 | Denso Corp | Rotary electric machine |
| KR102498756B1 (en) * | 2022-08-31 | 2023-02-13 | 삼도산업전기(주) | Operating apparatus for point machine having improved durability |
-
1998
- 1998-09-14 JP JP10259800A patent/JP2000092777A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012005273A (en) * | 2010-06-18 | 2012-01-05 | Ihi Corp | Bearing retaining structure of steam turbine power generator |
| JP2014107973A (en) * | 2012-11-28 | 2014-06-09 | Denso Corp | Rotary electric machine |
| KR102498756B1 (en) * | 2022-08-31 | 2023-02-13 | 삼도산업전기(주) | Operating apparatus for point machine having improved durability |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2010025087A (en) | Axial fan | |
| JPH0763193A (en) | Impeller installation structure for centrifugal type low temperature compressor | |
| JP2000092777A (en) | Support structure for bearing in rotating machine | |
| US6270260B1 (en) | Anti-rotational bearing device | |
| JP2004312984A (en) | Axial-gap type motor | |
| JP4198810B2 (en) | Throttle body and manufacturing method thereof | |
| JPH07115746A (en) | Rotating electric machine with bracket | |
| JP3978978B2 (en) | Spindle motor | |
| CN217935285U (en) | Electric machine | |
| JPS58190260A (en) | Manufacture of motor housing | |
| KR0129002Y1 (en) | Head drum assembly of a tape recorder | |
| JPS608571A (en) | Casing | |
| JP4182169B2 (en) | Method of attaching spindle body to rotor and processing device | |
| JPH06209549A (en) | Outer rotor type induction motor | |
| JPH05106633A (en) | Dynamic pressure bearing | |
| JP2507182Y2 (en) | Clearance adjustable radial bearing | |
| JP4360508B2 (en) | Rotating body for polygon scanner and method for manufacturing the same, polygon scanner, optical scanning device, and image forming apparatus | |
| JP2999581B2 (en) | Spindle motor | |
| JP2003074573A (en) | Electric motor | |
| JPH0819962B2 (en) | Shaft device for supporting clutch drum | |
| JPH0636348U (en) | Motor bracket structure | |
| JP3738142B2 (en) | Rotor device for polygon mirror motor | |
| KR0123248Y1 (en) | Head drum assembly | |
| JPS5934822Y2 (en) | Electric blower impeller attachment device | |
| JPH07312841A (en) | Spindle motor |