JP2014043918A5 - - Google Patents
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- JP2014043918A5 JP2014043918A5 JP2012187458A JP2012187458A JP2014043918A5 JP 2014043918 A5 JP2014043918 A5 JP 2014043918A5 JP 2012187458 A JP2012187458 A JP 2012187458A JP 2012187458 A JP2012187458 A JP 2012187458A JP 2014043918 A5 JP2014043918 A5 JP 2014043918A5
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- JP
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- Prior art keywords
- metal powder
- sintered layer
- layer portion
- powder sintered
- peripheral surface
- Prior art date
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- 239000000843 powder Substances 0.000 claims description 73
- 239000002184 metal Substances 0.000 claims description 66
- 230000002093 peripheral Effects 0.000 claims description 25
- 229910000906 Bronze Inorganic materials 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 230000003068 static Effects 0.000 claims description 6
- 230000002706 hydrostatic Effects 0.000 claims description 4
- 239000011148 porous material Substances 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 2
Description
例えば、本発明の第一の態様は、支持対象である回転体のラジアル方向の荷重を軸受面で非接触支持する静圧気体ラジアル軸受であって、
内周面を前記軸受面とする筒状の第一の金属粉末焼結層部と、
前記第一の金属粉末焼結層部の外周面上に形成され、前記第一の金属粉末焼結層部よりも大きな気孔率を有する第二の金属粉末焼結層部と、を備え、
前記第一の金属粉末焼結層部は、一次焼結することにより形成され、
前記第二の金属粉末焼結層部は、前記第一の金属粉末焼結層部をコアとして、当該コアを筒状の型内に配置し、当該コアと当該型との隙間に金属粉末を充填して二次焼結することにより形成される。
For example, the first aspect of the present invention is a hydrostatic gas radial bearing that supports a radial load of a rotating body to be supported in a non-contact manner on a bearing surface,
A cylindrical first metal powder sintered layer portion having an inner peripheral surface as the bearing surface;
A second metal powder sintered layer portion formed on the outer peripheral surface of the first metal powder sintered layer portion and having a porosity larger than that of the first metal powder sintered layer portion,
The first metal powder sintered layer portion is formed by primary sintering,
The second metal powder sintered layer portion has the first metal powder sintered layer portion as a core, the core is disposed in a cylindrical mold, and the metal powder is placed in a gap between the core and the mold. It is formed by filling and secondary sintering.
このような静圧気体ラジアル軸受１Ａにおいて、図示していない給気ポンプによりバックメタル４を介して第二の金属粉末焼結層部３の外周面３２に供給された圧縮気体は、第二の金属粉末焼結層部３内の気孔を介して第二の金属粉末焼結層部３の内周面３１に到達し、第一の金属粉末焼結層部２Ａの外周面２２に供給される。それから、第一の金属粉末焼結層部２Ａ内の気孔を介して、軸受面である第一の金属粉末焼結層部２Ａの内周面２１に到達して、この内周面２１全域から均一に吐出される。これにより、軸受面２１と静圧気体ラジアル軸受１Ａの貫通孔１１に挿入された不図示の回転体の外周面との間に圧縮気体層が形成され、この回転体のラジアル方向の荷重が非接触で支持される。この際、第一の金属粉末焼結層部２Ａの気孔率（例えば１０％以下）が第二の金属粉末焼結層部３の気効率（例えば２５％以上）よりも小さく、この第一の金属粉末焼結層部２Ａ内の気孔が圧縮気体の流路の絞り部として機能するため、第一の金属粉末焼結層部２Ａの内周面２１から吐出される圧縮気体が絞られ、その吐出量が調整される。 In such a static pressure gas radial bearing 1A, the compressed gas supplied to the outer peripheral surface 32 of the second metal powder sintered layer portion 3 via the back metal 4 by an air supply pump (not shown) It reaches the inner peripheral surface 31 of the second metal powder sintered layer portion 3 through the pores in the metal powder sintered layer portion 3 and is supplied to the outer peripheral surface 22 of the first metal powder sintered layer portion 2A. . Then, it reaches the inner peripheral surface 21 of the first metal powder sintered layer portion 2A, which is the bearing surface, through the pores in the first metal powder sintered layer portion 2A, and from the entire inner peripheral surface 21. It is discharged uniformly. As a result, a compressed gas layer is formed between the bearing surface 21 and the outer peripheral surface of the rotating body (not shown) inserted into the through hole 11 of the hydrostatic gas radial bearing 1A, and the radial load of the rotating body is not increased. Supported by contact. At this time, the porosity of the first metal powder sintered layer portion 2A (for example, 10% or less) of a second metal powder sintered layer 3 of exhaust efficiency (e.g., 25% or more) smaller than, the first Since the pores in the metal powder sintered layer portion 2A function as a throttle portion of the compressed gas flow path, the compressed gas discharged from the inner peripheral surface 21 of the first metal powder sintered layer portion 2A is throttled. The discharge amount is adjusted.
上記構成の静圧気体ラジアル軸受１Ｂにおいて、図示していない給気ポンプによりバックメタル４を介して第二の金属粉末焼結層部３の外周面３２に供給された圧縮気体は、第二の金属粉末焼結層部３内の気孔を介して第二の金属粉末焼結層部３の内周面３１に到達し、第一の金属粉末焼結層部２Ｂの外周面２２に供給される。それから、第一の金属粉末焼結層部２Ｂ内の気孔を介して、軸受面である第一の金属粉末焼結層部２Ｂの内周面２１に到達し、この内周面２１全域から均一に吐出される。これにより、軸受面２１と静圧気体ラジアル軸受１Ｂの貫通孔１１に挿入された不図示の回転体との間に圧縮気体層が形成され、この回転体のラジアル方向の荷重が非接触で支持される。この際、第一の金属粉末焼結層部２Ｂの気孔率（例えば１０％以下）が第二の金属粉末焼結層部３の気効率（例えば２５％以上）よりも小さく、この第一の金属粉末焼結層部２Ｂ内の気孔が圧縮気体の流路の絞り部として機能するため、第一の金属粉末焼結層部２Ｂの内周面２１から吐出される圧縮気体が絞られ、その吐出量が調整される。 In the static pressure gas radial bearing 1B having the above-described configuration, the compressed gas supplied to the outer peripheral surface 32 of the second metal powder sintered layer portion 3 through the back metal 4 by an air supply pump (not shown) It reaches the inner peripheral surface 31 of the second metal powder sintered layer portion 3 through the pores in the metal powder sintered layer portion 3 and is supplied to the outer peripheral surface 22 of the first metal powder sintered layer portion 2B. . Then, it reaches the inner peripheral surface 21 of the first metal powder sintered layer portion 2B, which is the bearing surface, through the pores in the first metal powder sintered layer portion 2B, and is uniform from the entire inner peripheral surface 21. Discharged. As a result, a compressed gas layer is formed between the bearing surface 21 and a rotating body (not shown) inserted into the through hole 11 of the static pressure gas radial bearing 1B, and the radial load of the rotating body is supported without contact. Is done. At this time, the porosity of the first metal powder sintered layer portion 2B (for example, 10% or less) of a second metal powder sintered layer 3 of exhaust efficiency (e.g., 25% or more) smaller than, the first Since the pores in the metal powder sintered layer part 2B function as a throttle part of the compressed gas flow path, the compressed gas discharged from the inner peripheral surface 21 of the first metal powder sintered layer part 2B is throttled, The discharge amount is adjusted.
第二の金属粉末焼結層部３は、第一の金属粉末焼結層部２Ｃに用いる球状青銅合金粉末よりも大きな平均粒径の球状青銅合金粉末を焼結することにより得られる多孔質体で構成されている。例えば、円筒状の第一の金属粉末焼結層部２Ｃをコアとして、このコアを型として用いる金属製の円筒状のスリーブ内に互いの軸心が一致するように配置し、このコアの外周面とスリーブの内周面との隙間に、第一の金属粉末焼結層部２Ｃに用いる球状青銅合金粉末よりも大きな平均粒径の球状青銅合金粉末を充填して、コア、充填された、第一の金属粉末焼結層部２Ｃに用いる球状青銅合金粉末よりも大きな平均粒径の球状青銅合金粉末、およびスリーブを一緒に二次焼結することにより、第二の金属粉末焼結層部３が、第一の金属粉末焼結層部２Ｃの外周面２２上に、第一の金属粉末焼結層部２Ｃと拡散接合した状態で形成されるとともに、このスリーブにより、バックメタル４が、第二の金属粉末焼結層部３の外周面３２上に、第二の金属粉末焼結層部３と拡散接合した状態で形成される。ここで、第二の金属粉末焼結層部３に用いる球状青銅合金粉末には、少なくとも第二の金属粉末焼結層部３の気孔率を第一の金属粉末焼結層部２Ｃの気孔率より大きくすることのできる平均粒径のものが用いられる。例えば、第一の金属粉末焼結層部２Ｃの気孔率が１０％以下である場合、第二の金属粉末焼結層部３の気孔率が２５％以上となるように、球状青銅合金粉末の平均粒径が選択される。 The second metal powder sintered layer portion 3 is a porous body obtained by sintering a spherical bronze alloy powder having a larger average particle diameter than the spherical bronze alloy powder used for the first metal powder sintered layer portion 2C. It consists of For example, a cylindrical first metal powder sintered layer portion 2C is used as a core, and the core is disposed in a metal cylindrical sleeve using the core as a mold so that the axes of the cores coincide with each other. A spherical bronze alloy powder having an average particle size larger than the spherical bronze alloy powder used for the first metal powder sintered layer portion 2C is filled in the gap between the surface and the inner peripheral surface of the sleeve, and the core is filled. By sintering the spherical bronze alloy powder having an average particle size larger than that of the spherical bronze alloy powder used for the first metal powder sintered layer portion 2C and the sleeve together, the second metal powder sintered layer portion 3 is formed on the outer peripheral surface 22 of the first metal powder sintered layer portion 2C in a state of being diffusion bonded to the first metal powder sintered layer portion 2C, and the back metal 4 is formed by this sleeve. On the outer peripheral surface 32 of the second metal powder sintered layer portion 3, the second It is formed in a state of being diffusion bonded and attributes powder sintered layer portion 3. Here, in the spherical bronze alloy powder used for the second metal powder sintered layer portion 3, at least the porosity of the second metal powder sintered layer portion 3 is set to the porosity of the first metal powder sintered layer portion 2C. An average particle size that can be made larger is used. For example, when the porosity of the first metal powder sintered layer portion 2C is 10% or less, the spherical bronze alloy powder is formed so that the porosity of the second metal powder sintered layer portion 3 is 25% or more. An average particle size is selected.
上記構成の静圧気体ラジアル軸受１Ｃにおいて、図示していない給気ポンプによりバックメタル４を介して第二の金属粉末焼結層部３の外周面３２に供給された圧縮気体は、第二の金属粉末焼結層部３内の気孔を介して第二の金属粉末焼結層部３の内周面３１に到達し、第一の金属粉末焼結層部２Ｃの外周面２２に供給される。それから、第一の金属粉末焼結層部２Ｃ内の気孔を介して、軸受面である第一の金属粉末焼結層部２Ｃの内周面２１に到達し、この内周面２１全域から均一に吐出される。これにより、軸受面２１と静圧気体ラジアル軸受１Ｃの貫通孔１１に挿入された不図示の回転体の外周面との間に圧縮気体層が形成され、この回転体のラジアル方向の荷重が非接触で支持される。この際、第一の金属粉末焼結層部２Ｃの気孔率（例えば１０％以下）が第二の金属粉末焼結層部３の気孔率（例えば２５％以上）より小さく、この第一の金属粉末焼結層部２Ｃ内の気孔が圧縮気体の流路の絞り部として機能するため、第一の金属粉末焼結層部２Ｃの内周面２１から吐出される圧縮気体が絞られ、その吐出量が調整される。
In the static pressure gas radial bearing 1C having the above-described configuration, the compressed gas supplied to the outer peripheral surface 32 of the second metal powder sintered layer portion 3 via the back metal 4 by an air supply pump (not shown) through the pores of the metal powder sintered layer section 3 reaches the second inner circumferential surface 31 of the metal powder sintered layer 3, is supplied to the outer circumferential surface 22 of the first metal powder sintered layer unit 2C . Then, it reaches the inner peripheral surface 21 of the first metal powder sintered layer portion 2C, which is the bearing surface, through the pores in the first metal powder sintered layer portion 2C, and is uniform from the entire inner peripheral surface 21. Discharged. As a result, a compressed gas layer is formed between the bearing surface 21 and the outer peripheral surface of the rotating body (not shown) inserted into the through hole 11 of the static pressure gas radial bearing 1C, and the radial load of the rotating body is not increased. Supported by contact. At this time, the porosity (for example, 10% or less) of the first metal powder sintered layer portion 2C is smaller than the porosity (for example, 25% or more) of the second metal powder sintered layer portion 3; Since the pores in the powder sintered layer portion 2C function as a throttle portion of the compressed gas flow path, the compressed gas discharged from the inner peripheral surface 21 of the first metal powder sintered layer portion 2C is throttled and discharged. The amount is adjusted.
Claims (2)
内周面を前記軸受面とする筒状の第一の金属粉末焼結層部と、
前記第一の金属粉末焼結層部の外周面上に形成され、前記第一の金属粉末焼結層部よりも大きな気孔率を有する第二の金属粉末焼結層部と、を備え、
前記第一の金属粉末焼結層部は、一次焼結することにより形成され、
前記第二の金属粉末焼結層部は、前記第一の金属粉末焼結層部をコアとして、当該コアを筒状の型内に配置し、当該コアと当該型との隙間に金属粉末を充填して二次焼結することにより形成される
ことを特徴とする静圧気体ラジアル軸受。 A static pressure gas radial bearing that supports a radial load of a rotating body to be supported in a non-contact manner on a bearing surface,
A cylindrical first metal powder sintered layer portion having an inner peripheral surface as the bearing surface;
A second metal powder sintered layer portion formed on the outer peripheral surface of the first metal powder sintered layer portion and having a porosity larger than that of the first metal powder sintered layer portion,
The first metal powder sintered layer portion is formed by primary sintering,
The second metal powder sintered layer portion has the first metal powder sintered layer portion as a core, the core is disposed in a cylindrical mold, and the metal powder is placed in a gap between the core and the mold. A hydrostatic gas radial bearing characterized by being formed by filling and secondary sintering.
前記第二の金属粉末焼結層部には、前記第一の金属粉末焼結層部に用いる球状青銅合金粉末より大きな平均粒径の球状青銅合金粉末が用いられている
ことを特徴とする静圧気体ラジアル軸受。 The hydrostatic gas radial bearing according to claim 1,
In the second metal powder sintered layer portion, a spherical bronze alloy powder having an average particle size larger than that of the spherical bronze alloy powder used in the first metal powder sintered layer portion is used. Pressure gas radial bearing.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012187458A JP5965783B2 (en) | 2012-08-28 | 2012-08-28 | Method for producing hydrostatic gas radial bearing |
| TW102123629A TW201408897A (en) | 2012-08-28 | 2013-07-02 | Aerostatic radial bearing |
| KR1020157002771A KR20150051993A (en) | 2012-08-28 | 2013-08-01 | Aerostatic radial bearing |
| CN201380041376.0A CN104520600B (en) | 2012-08-28 | 2013-08-01 | Pressurized air journal bearing |
| PCT/JP2013/070860 WO2014034368A1 (en) | 2012-08-28 | 2013-08-01 | Aerostatic radial bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012187458A JP5965783B2 (en) | 2012-08-28 | 2012-08-28 | Method for producing hydrostatic gas radial bearing |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2014043918A JP2014043918A (en) | 2014-03-13 |
| JP2014043918A5 true JP2014043918A5 (en) | 2015-07-23 |
| JP5965783B2 JP5965783B2 (en) | 2016-08-10 |
Family
ID=50183186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012187458A Active JP5965783B2 (en) | 2012-08-28 | 2012-08-28 | Method for producing hydrostatic gas radial bearing |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5965783B2 (en) |
| KR (1) | KR20150051993A (en) |
| CN (1) | CN104520600B (en) |
| TW (1) | TW201408897A (en) |
| WO (1) | WO2014034368A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI644029B (en) * | 2016-06-30 | 2018-12-11 | 祥瑩有限公司 | Double-layer sliding bearing |
| CN115057101A (en) * | 2022-06-02 | 2022-09-16 | 深圳市恒歌科技有限公司 | Metal perfume volatilization cover and manufacturing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1162966A (en) * | 1997-08-28 | 1999-03-05 | Toshiba Mach Co Ltd | Hydrostatic bearing and manufacture thereof |
| JP2000009142A (en) * | 1998-06-18 | 2000-01-11 | Asahi Optical Co Ltd | Manufacture of bearing device and bearing device |
| JP4385618B2 (en) * | 2002-08-28 | 2009-12-16 | オイレス工業株式会社 | Bearing material for porous hydrostatic gas bearing and porous hydrostatic gas bearing using the same |
| JP2005221002A (en) * | 2004-02-05 | 2005-08-18 | Nsk Ltd | Forming method for gas throttle layer |
| JP2006097797A (en) * | 2004-09-29 | 2006-04-13 | Oiles Ind Co Ltd | Porous static pressure gas bearing and its manufacturing method |
| KR100600668B1 (en) * | 2004-10-18 | 2006-07-13 | 한국과학기술연구원 | Air foil bearing having a porous foil |
-
2012
- 2012-08-28 JP JP2012187458A patent/JP5965783B2/en active Active
-
2013
- 2013-07-02 TW TW102123629A patent/TW201408897A/en unknown
- 2013-08-01 KR KR1020157002771A patent/KR20150051993A/en active Search and Examination
- 2013-08-01 CN CN201380041376.0A patent/CN104520600B/en not_active Expired - Fee Related
- 2013-08-01 WO PCT/JP2013/070860 patent/WO2014034368A1/en active Application Filing
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