WO2010050326A1 - 焼結軸受 - Google Patents
焼結軸受 Download PDFInfo
- Publication number
- WO2010050326A1 WO2010050326A1 PCT/JP2009/066878 JP2009066878W WO2010050326A1 WO 2010050326 A1 WO2010050326 A1 WO 2010050326A1 JP 2009066878 W JP2009066878 W JP 2009066878W WO 2010050326 A1 WO2010050326 A1 WO 2010050326A1
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- WO
- WIPO (PCT)
- Prior art keywords
- bearing
- dynamic pressure
- powder
- alloy powder
- sintered
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
- F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
- F16C17/107—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure with at least one surface for radial load and at least one surface for axial load
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/121—Use of special materials
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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
- F16C2370/00—Apparatus relating to physics, e.g. instruments
- F16C2370/12—Hard disk drives or the like
Definitions
- the present invention relates to a sintered bearing obtained by compacting a metal powder and then sintering it.
- the sintered bearing is formed by compacting a metal powder and then sintering at a predetermined temperature.
- the sintered bearing shown in Patent Document 1 is used for supporting a rotating shaft that supports a rotating shaft inserted in the inner periphery.
- the oil impregnated in the internal pores of the sintered bearing oozes out from the surface opening, and this oil is supplied to the sliding portion with the shaft, thereby improving the lubricity between the bearing and the shaft. It is done.
- the sintered bearing of Patent Document 1 is formed by sintering mixed metal powder containing Cu powder and SUS steel (stainless steel, hereinafter the same) powder.
- SUS steel powder with high hardness, it is possible to improve the wear resistance of the bearing surface, especially the bearing surface that slides with the rotating shaft, and by containing relatively soft Cu powder, sintering is achieved.
- the formability of the bearing can be improved.
- the characteristics of each metal may adversely affect the performance of the sintered bearing.
- a mixed bearing containing SUS steel powder is sintered at a relatively low temperature (about 800 ° C.) to form a sintered bearing
- an oxide film is formed on the powder surface of the SUS steel powder, and the influence of this oxide film.
- the bonding force between the powders is weakened, and the strength of the sintered bearing may be insufficient.
- this bearing is sintered at a relatively high temperature (for example, 1200 ° C.), the formation of an oxide film can be suppressed, but the sintering progresses and the sintered bearing becomes too hard.
- Patent Document 2 discloses a sintered bearing using copper-coated iron powder.
- the surface of the iron powder is coated with copper, the formation of an oxide film on the surface of the iron powder can be prevented even when sintered at a relatively low temperature.
- this copper-coated iron powder is formed by plating copper on the surface of the iron powder, etc., and the adhesion force between the iron powder and copper is not so high, so the iron powder and copper peel off due to impact load This may lead to insufficient strength of the bearing.
- An object of the present invention is to provide a sintered bearing that is formed of a plurality of different types of metal materials and can be formed without causing problems such as deterioration of workability and strength reduction.
- the present invention is a sintered bearing formed by sintering a compression molded body of metal powder, each particle having a plurality of regions made of different metal materials, and Provided is a sintered bearing using a metal powder containing a separated alloy powder obtained by alloying at least a part of the interface of each region.
- the metal powder containing the separated alloy powder since the metal powder containing the separated alloy powder is used, the characteristics of a plurality of kinds of metal materials constituting each particle of the separated alloy powder can be utilized. Moreover, since at least a part of the interface of each region made of different metals is alloyed in the separated alloy powder, the bond strength between the regions is increased, and the strength of the sintered bearing is increased.
- the wear resistance of the bearing surface can be improved by exposing Fe to the bearing surface. it can.
- the effect of corrosion resistance can be obtained in addition to wear resistance by Cr contained in SUS steel.
- the area where Fe is exposed on the powder surface can be reduced. It is possible to prevent a reduction in the bonding force between them, and consequently a reduction in the strength of the sintered bearing.
- the separated alloy powder has a region made of a Cu-based metal material (a metal material containing Cu as a main component), Cu is softer than SUS steel or the like, so that metal powder compacting, sizing, etc. This improves the workability and improves the dimensional accuracy of the bearing. Further, by exposing relatively soft Cu to the bearing surface, the slidability with the counterpart material (for example, shaft member) can be enhanced.
- a Cu-based metal material a metal material containing Cu as a main component
- the above-described separated alloy powder can be produced, for example, by a so-called atomizing method in which various metal materials are mixed in a molten state and the mixed molten metal is sprayed and solidified by cooling. According to the atomization method, different metal materials can be blended evenly, so that the characteristics of each metal material can be easily exhibited.
- Such a sintered bearing can be used, for example, as a fluid dynamic pressure bearing in which a dynamic pressure generating portion for generating a dynamic pressure action on the fluid is formed on the bearing surface.
- FIG. 1 shows a bearing sleeve 1 as a sintered bearing according to an embodiment of the present invention.
- the bearing sleeve 1 is formed in a cylindrical shape having both ends opened, and is incorporated into a fluid dynamic bearing device 100 shown in FIGS.
- the bearing sleeve 1 is formed by sintering metal powder containing separated alloy powder. Specifically, it is formed by using a metal powder obtained by mixing a separated alloy powder, a pure copper powder, a graphite powder and the like whose surface is covered with a Cu-based metal material.
- the inner peripheral surface 1a and the lower end surface 1c of the bearing sleeve 1 function as a radial bearing surface and a thrust bearing surface, respectively.
- herringbone-shaped dynamic pressure grooves 1a1 and 1a2 as shown in FIG. 1A are formed as radial dynamic pressure generating portions in two regions separated in the axial direction of the inner peripheral surface 1a of the bearing sleeve 1. Is done.
- the upper dynamic pressure groove 1a1 is formed to be axially asymmetric with respect to the belt-like portion at the substantially central portion in the axial direction of the hill portion (cross-hatching region), and the axial dimension X1 of the upper region from the belt-like portion is the lower region. Is larger than the axial dimension X2 (X1> X2).
- the lower dynamic pressure groove 1a2 is formed symmetrically in the axial direction.
- FIG. 2 shows a cross-sectional view of one particle of the separated alloy powder 10.
- This separated alloy powder 10 has a first region 11 made of Fe-based metal material rich in Fe (SUS steel in the present embodiment) and a second region 12 made of Cu-based metal material rich in Cu. . At least a part of the interface between the first region 11 and the second region is alloyed.
- the first region 11 is generally arranged as a nucleus at the center of the particle, and the surface of the first region 11 is covered with the second region 12.
- separation alloy powder 10 is substantially comprised with Cu of the 2nd area
- FIG. 3 shows an enlarged sectional view of the bearing surface A (radial bearing surface or thrust bearing surface) of the bearing sleeve 1.
- pure copper powder 13 and graphite powder 14 are arranged in the gaps between the particles of the separated alloy powder 10.
- the adjacent separated alloy powders 10 are directly bonded by melting a part of their surfaces, or are bonded via the pure copper powder 13 between the separated alloy powders 10.
- the first surface 11 and the second region 12 of the separated alloy powder 10 are exposed on the bearing surface A.
- the wear resistance of the bearing surface A can be enhanced by exposing the SUS steel (first region 11) to the surface of the bearing sleeve 1, particularly the bearing surface A. Further, by exposing Cu (second region 12) to the bearing surface A, it is possible to improve the slidability of the bearing surface A with the sliding counterpart material (in this embodiment, the shaft member 2, see FIG. 5). . Further, by forming the bearing sleeve 1 with a material containing relatively soft Cu, the workability of the bearing sleeve 1 can be improved and the dimensional accuracy can be increased.
- the separated alloy powder 10 is formed.
- the separated alloy powder 10 is produced by, for example, a so-called atomizing method in which each metal material (in this embodiment, Fe, Cr, and Cu) is mixed in a molten state and then cooled and solidified by spraying the mixed molten metal. can do.
- a gas atomizing method in which a molten metal is sprayed using a gas or a water atomizing method in which a molten metal is sprayed using water can be applied.
- the separated alloy powder 10 shown in FIG. 2 is manufactured by the gas atomization method, and the outer periphery of the SUS steel (first region 11) gathered mainly in the center is covered with Cu (second region 12). It is almost spherical.
- any of ferritic, martensitic and austenitic types can be used, and the amount of Cr and Ni in the SUS steel is arbitrarily selected according to the required bearing characteristics.
- the separation alloy powder 10 When the separation alloy powder 10 is manufactured, by adjusting the blending ratio of each metal material to be mixed in a molten state, a core metal material, a metal material covering the surface layer, and the like can be arbitrarily set. For example, when the mixing ratio of Cu is larger than that of Fe, as shown in FIG. 2, the separated alloy powder whose core is SUS steel (first region 11) and whose surface is coated with Cu (second region 12). 10 is obtained. At this time, if the blending amount of the main component metals (Fe and Cu in the present embodiment) is too small, the metal may be dissolved in another metal, and the separated alloy powder may not be formed. It is necessary to set the amount of the metal to a ratio that does not cause solid solution.
- the mixed metal powder containing the separated alloy powder 10 is compacted into a predetermined shape by molding.
- the mixed metal powder appropriately includes, for example, pure copper powder, graphite powder, Sn, and Fe—P mixed powder.
- Table 1 shows an example of the composition of the mixed metal powder.
- Table 2 shows an example of the alloy composition of the separated alloy powder 10 manufactured by the gas atomization method.
- the SUS steel and Cu-based metal aspects of the separated alloy powder 10 are determined by the amount of each molten metal. Therefore, for example, when it is desired to increase the amount of Cu in the sintered material while maintaining the particle mode (the ratio of SUS steel and Cu in the separated alloy powder) as shown in FIG. Can be mixed.
- the pure copper powder is a dendritic electrolytic copper powder
- the powders are easily entangled with each other at the time of molding, so that the bonding force between the particles can be further increased and the rigidity of the molded product can be increased.
- graphite powder by mixing graphite powder with the sintered material, the lubricating effect at the time of processing and at the time of using the bearing can be enhanced.
- the green compact molded body is sintered at a predetermined sintering temperature to obtain a sintered body approximately in the shape of the bearing sleeve 1.
- the sintering temperature at this time is preferably equal to or lower than the melting point of the lowest melting point metal among the plurality of metals constituting the separated alloy powder 10.
- the temperature is equal to or lower than the melting point of Cu (for example, 800 ° C. ).
- the surface of the particles of the separated alloy powder 10 shown in FIG. 2 is substantially formed of a Cu-based metal (second region 12), and the SUS steel (first region 11) is hardly exposed. Thereby, even when sintered at a relatively low temperature as described above, an oxide film is hardly formed on the surface of the particles, so that a reduction in the bonding force between the metal powders due to the oxide film can be prevented. Strength can be increased.
- sizing is performed on the sintered body, and dynamic pressure grooves are formed on the inner peripheral surface and the end surface.
- the sintered body is sintered at a relatively low temperature, the hardness is not excessively increased and processing such as sizing is easily performed.
- the particle surface of the separated alloy powder 10 is formed of a relatively soft Cu-based alloy (second region 12), the workability of the sintered body is further enhanced. Thereby, a radial bearing surface (inner peripheral surface 1a), a thrust bearing surface (lower end surface 1c), or a dynamic pressure generating portion (dynamic pressure grooves 1a1, 1a2, 1c1) formed on these surfaces are processed with high accuracy. can do.
- the bearing sleeve 1 formed in this way has high dimensional accuracy, the radial width of the radial bearing gap facing the inner peripheral surface 1a and the width of the thrust bearing gap facing the lower end surface 1c are set with high accuracy, and excellent bearing performance is achieved. Obtainable. Further, since the dynamic pressure grooves 1a1, 1a2, and 1c1 formed in the inner peripheral surface 1a and the lower end surface 1c are processed with high accuracy, the dynamic pressure action generated in the lubricating oil in the radial bearing gap and the thrust bearing gap is enhanced. Therefore, the bearing performance can be further improved.
- this bearing sleeve 1 removes a part of Cu-type metal (2nd area
- the SUS steel (first region 11) may be positively exposed. In this way, by exposing a large amount of SUS steel with excellent wear resistance to the inner peripheral surface 1a to become the radial bearing surface, the wear resistance of the radial bearing surface is further improved, and the durability of the bearing sleeve 1 is further increased. It can be further enhanced.
- the rotational sizing may be performed after sizing the sintered body and before forming the dynamic pressure groove, or after forming the dynamic pressure groove.
- the present invention is not limited thereto, and a separated alloy powder manufactured by the water atomized method may be used.
- the first region 21 for example, Fe-based metal
- the second region 22 for example, Cu-based metal
- SUS steel and Cu can be more uniformly exposed on the bearing surface as compared with the separated alloy powder 10 in which the outer periphery of the first region 11 serving as a nucleus as shown in FIG. 2 is covered with the second region 12.
- both characteristics (abrasion resistance and slidability) can be imparted to the entire bearing surface.
- FIG. 5 shows a configuration example of a spindle motor for information equipment incorporating the fluid dynamic bearing device 100 having the bearing sleeve 1 described above.
- This spindle motor is used in a disk drive device such as an HDD, and is a fluid dynamic bearing device 100 that supports the shaft member 2 in a non-contact manner in a rotatable manner, a disk hub 3 mounted on the shaft member 2,
- a bracket 6 attached to the outer periphery of the pressure bearing device 100, and a stator coil 4 and a rotor magnet 5 that are opposed to each other with a radial gap, for example, are provided.
- the stator coil 4 is attached to the outer peripheral surface of the bracket 6, and the rotor magnet 5 is attached to the inner periphery of the disk hub 3.
- the disk hub 3 holds a plurality of disks D (two in the illustrated example) such as magnetic disks.
- the stator coil 4 When the stator coil 4 is energized, the rotor magnet 5 is relatively rotated by the electromagnetic force between the stator coil 4 and the rotor magnet 5, whereby the disk hub 3 and the shaft member 2 are rotated together.
- FIG. 6 shows the fluid dynamic bearing device 100.
- the fluid dynamic bearing device 100 includes a bottomed cylindrical housing 7 opened in one axial direction, a bearing sleeve 1 as a sintered bearing disposed on the inner periphery of the housing 7, and an inner periphery of the housing 7.
- the shaft member 2 to be formed and a seal portion 9 provided in the opening portion of the housing 7.
- the description will be made with the side where the housing 7 is opened in the axial direction as the upper side and the side where the housing 7 is closed as the lower side.
- the shaft member 2 is made of a metal material such as stainless steel, and includes a shaft portion 2a and a flange portion 2b provided at the lower end of the shaft portion 2a.
- the shaft member 2 can be made of a metal-resin hybrid structure, for example, by forming the entirety of the flange portion 2b or a part thereof (for example, both end faces) with resin, in addition to being formed entirely of metal.
- the housing 7 is formed of a resin material, for example, in a bottomed cylindrical cup shape. On the inner bottom surface 7b1 of the housing 7, for example, a spiral dynamic pressure groove is formed (not shown).
- the outer peripheral surface 1d of the bearing sleeve 1 is fixed to the inner peripheral surface 7c of the housing 7 by an appropriate means such as adhesion or press fitting.
- the housing 7 is not limited to being formed integrally, but may be configured by a cylindrical side portion and a lid portion that closes one opening of the side portion.
- the seal portion 9 is formed in an annular shape with a resin material, for example.
- the inner peripheral surface 9a of the seal part 9 is formed in a cylindrical surface shape.
- a wedge-shaped seal space S is formed between the inner peripheral surface 9a of the seal portion 9 and the tapered outer peripheral surface 2a2 of the shaft portion 2a.
- a capillary seal that holds the lubricating oil by the capillary force of the seal space S is configured.
- the volume of the seal space S is set to be larger than the thermal expansion amount of the lubricating oil held inside the bearing device within the operating temperature range of the bearing device, and thus, within the operating temperature range of the bearing device. The lubricating oil does not leak from the seal space S, and the oil level is always held in the seal space S.
- a radial bearing gap is formed between the inner peripheral surface 1a of the bearing sleeve 1 and the cylindrical outer peripheral surface 2a1 of the shaft member 2, and the lower end surface 1c of the bearing sleeve 1 and the shaft member 2 are formed.
- Thrust bearing gaps are formed between the upper end surface 2b1 of the flange portion 2b and between the inner bottom surface 7b1 of the housing 7 and the lower end surface 2b2 of the flange portion 2b of the shaft member.
- the dynamic pressure groove 1c1 on the lower end surface 1c of the bearing sleeve 1 and the dynamic pressure groove on the inner bottom surface 7b1 of the housing 7 generate a dynamic pressure action on the lubricating oil in the thrust bearing gaps, so that the shaft member 2
- the first thrust bearing portion T1 and the second thrust bearing portion T2 are configured to support the flange portion 2b in a non-contact manner so as to be rotatable in both thrust directions.
- the lower end of the radial bearing gap is connected to the outer diameter end of the bearing gap of the first thrust bearing portion T1.
- the dynamic pressure groove 1a1 of the inner peripheral surface 1a of the bearing sleeve 1 is formed axially asymmetric with respect to the belt-like portion of the hill, and the axial dimension X1 in the upper region from the belt-like portion is lower. It is larger than the axial dimension X2 of the region (see FIG. 1A). Therefore, when the shaft member 2 rotates, the pulling force (pumping force) of the lubricating oil by the dynamic pressure groove 1a1 is relatively larger in the upper region than in the lower region.
- the lubricating oil in the radial bearing gap flows downward, and the thrust bearing gap of the first thrust bearing portion T1 ⁇ the axial groove 1d1 ⁇ the lower end surface 9b of the seal portion 9 and the upper side of the bearing sleeve 1 It circulates through the path
- the structure in which the lubricating oil flows and circulates in the internal space of the housing 7 prevents a phenomenon in which the pressure of the lubricating oil in the internal space becomes a negative pressure locally, resulting in the generation of negative pressure.
- the herringbone-shaped dynamic pressure grooves 1a1 and 1a2 are formed as the radial dynamic pressure generating portion.
- the present invention is not limited to this.
- a spiral-shaped dynamic pressure groove, a step bearing, or a multi-arc bearing is used. It may be adopted.
- a so-called circular bearing may be configured in which both the outer peripheral surface 2a1 of the shaft portion 2a and the inner peripheral surface 1a of the bearing sleeve 1 are cylindrical surfaces without providing the dynamic pressure generating portion.
- the spiral dynamic pressure groove is formed as the thrust dynamic pressure generating portion.
- the present invention is not limited to this.
- the herringbone-shaped dynamic pressure groove, the step bearing, or the wave bearing step It is also possible to adopt a wave type).
- the dynamic pressure generating portion is formed on the inner peripheral surface 1a, the lower end surface 1c, and the housing inner bottom surface 7b1 of the bearing sleeve 1, but the surfaces facing each other through the bearing gap, That is, a dynamic pressure generating portion may be provided on the outer peripheral surface 2a1 of the shaft portion 2a, the upper end surface 2b1 and the lower end surface 2b2 of the flange portion 2b.
- the radial bearing portions R1 and R2 are provided apart in the axial direction, but these may be provided continuously in the axial direction. Alternatively, only one of these may be provided.
- the lubricating oil is exemplified as the fluid that fills the fluid dynamic pressure bearing device 100 and generates a dynamic pressure action in the radial bearing gap or the thrust bearing gap.
- a fluid capable of generating a dynamic pressure action in the gap for example, a gas such as air, a magnetic fluid, or lubricating grease can also be used.
- the fluid dynamic pressure bearing device is not limited to a spindle motor used in a disk drive device such as an HDD, but is a small motor for information equipment used under high-speed rotation, such as a spindle motor for driving a magneto-optical disk. It can be suitably used for a polygon scanner motor of a laser beam printer or a fan motor of an electric device.
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sliding-Contact Bearings (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
10 分離合金粉
11 第1領域(SUS鋼)
12 第2領域(Cu系金属材料)
A 軸受面
2 軸部材
3 ディスクハブ
4 ステータコイル
5 ロータマグネット
6 ブラケット
7 ハウジング
9 シール部
100 流体動圧軸受装置
R1、R2 ラジアル軸受部
T1、T2 スラスト軸受部
S シール空間
Claims (8)
- 金属粉末の圧縮成形体を焼結してなる焼結軸受であって、
各粒子が異なる金属材料からなる複数の領域を有し、且つ、各領域の界面の少なくとも一部を合金化した分離合金粉を含む金属粉末を用いた焼結軸受。 - 分離合金粉がFe系金属材料からなる領域を有する請求項1記載の焼結軸受。
- Fe系金属材料がSUS鋼である請求項2記載の焼結軸受。
- 分離合金粉が、Fe系金属材料の表面の少なくとも一部を他の金属材料で被覆したものである請求項2又は3記載の焼結軸受。
- 分離合金粉がCu系金属材料からなる領域を有する請求項1~4の何れかに記載の焼結軸受。
- 分離合金粉がアトマイズ法で製造されたものである請求項1~5の何れかに記載の焼結軸受。
- 流体動圧軸受として使用され、軸受面に、流体に動圧作用を発生させる動圧発生部を形成した請求項1~6の何れかに記載記載の焼結軸受。
- 請求項1~7の何れかに記載の焼結軸受と、焼結軸受の内周に挿入された軸部材とを備えた流体動圧軸受装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US13/126,091 US20110206305A1 (en) | 2008-10-29 | 2009-09-29 | Sintered bearing |
CN2009801434861A CN102202819A (zh) | 2008-10-29 | 2009-09-29 | 烧结轴承 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008278468A JP5384079B2 (ja) | 2008-10-29 | 2008-10-29 | 焼結軸受 |
JP2008-278468 | 2008-10-29 |
Publications (1)
Publication Number | Publication Date |
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WO2010050326A1 true WO2010050326A1 (ja) | 2010-05-06 |
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ID=42128692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2009/066878 WO2010050326A1 (ja) | 2008-10-29 | 2009-09-29 | 焼結軸受 |
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US (1) | US20110206305A1 (ja) |
JP (1) | JP5384079B2 (ja) |
CN (1) | CN102202819A (ja) |
WO (1) | WO2010050326A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102062149A (zh) * | 2010-10-18 | 2011-05-18 | 浙江长盛滑动轴承有限公司 | 高性能铁基粉末冶金含油自润滑轴承及其生产工艺 |
CN102338154A (zh) * | 2010-07-16 | 2012-02-01 | 三星电机株式会社 | 多孔液体动压轴承 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5558041B2 (ja) * | 2009-08-04 | 2014-07-23 | Ntn株式会社 | Fe系焼結金属製軸受およびその製造方法 |
WO2018047765A1 (ja) * | 2016-09-06 | 2018-03-15 | Ntn株式会社 | すべり軸受 |
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JPS54150309A (en) * | 1978-05-16 | 1979-11-26 | Commissariat Energie Atomique | Production of alloy parts by powder metallurgy |
JPS63297502A (ja) * | 1987-05-29 | 1988-12-05 | Kobe Steel Ltd | 粉末冶金用高強度合金鋼粉及びその製造方法 |
JPH06145845A (ja) * | 1992-11-02 | 1994-05-27 | Sumitomo Electric Ind Ltd | 焼結摩擦材 |
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CN102338154A (zh) * | 2010-07-16 | 2012-02-01 | 三星电机株式会社 | 多孔液体动压轴承 |
CN102062149A (zh) * | 2010-10-18 | 2011-05-18 | 浙江长盛滑动轴承有限公司 | 高性能铁基粉末冶金含油自润滑轴承及其生产工艺 |
Also Published As
Publication number | Publication date |
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CN102202819A (zh) | 2011-09-28 |
JP5384079B2 (ja) | 2014-01-08 |
JP2010106306A (ja) | 2010-05-13 |
US20110206305A1 (en) | 2011-08-25 |
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