JP6769007B2 - モータ式燃料ポンプ用焼結軸受及びその製造方法 - Google Patents
モータ式燃料ポンプ用焼結軸受及びその製造方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0425—Copper-based alloys
-
- 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
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
-
- 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
- B22F5/106—Tube or ring forms
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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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
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
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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
- F16C33/10—Construction relative to lubrication
- F16C33/1095—Construction relative to lubrication with solids as lubricant, e.g. dry coatings, powder
-
- 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
- F16C33/128—Porous bearings, e.g. bushes of sintered alloy
-
- 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
- F16C33/14—Special methods of manufacture; Running-in
- F16C33/145—Special methods of manufacture; Running-in of sintered porous bearings
-
- 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
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/10—Copper
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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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
- F16C2202/00—Solid materials defined by their properties
- F16C2202/02—Mechanical properties
- F16C2202/10—Porosity
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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
- F16C2202/00—Solid materials defined by their properties
- F16C2202/50—Lubricating properties
- F16C2202/52—Graphite
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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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/10—Alloys based on copper
-
- 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
- F16C2220/00—Shaping
- F16C2220/02—Shaping by casting
- F16C2220/08—Shaping by casting by compression-moulding
-
- 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
- F16C2220/00—Shaping
- F16C2220/20—Shaping by sintering pulverised material, e.g. powder metallurgy
-
- 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
- F16C2360/22—Internal combustion engines
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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
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Sliding-Contact Bearings (AREA)
- Powder Metallurgy (AREA)
Description
Niは、焼結によりSn、CuとともにCu−Ni−Sn相を形成して、軸受に優れた耐食性を付与する。Ni含有量が10%未満では所望の耐食性が得られず、一方、Ni含有量が20%を超えても耐食性向上の効果が少なく、原料コストが高くなるため好ましくない。
Pは、圧粉体の焼結性を促進し、素地の強度を向上させる効果作用がある。P含有量が0.05%未満では素地の強度向上に効果が少ない。一方、P含有量が0.4%を越えると粒界にNi−P相の析出が多くなり、耐食性が低下するようになるので好ましくない。
Snは、焼結によりNi、CuとともにCu−Ni−Sn相を形成して、軸受に優れた耐食性を付与する。Sn含有量が2%未満では所望の耐食性が得られない。一方、Sn含有量が4.5%を超えると原料コストが高くなるので好ましくない。
Cは黒鉛に由来するものである。Cは、主に、素地中に分散している気孔内に遊離黒鉛として存在し、軸受に優れた潤滑性を付与し、耐摩耗性を向上させる。C含有量が2%未満では所望の効果が得られない。一方、C含有量が7%を越えても耐摩耗性向上の効果が少なく、かえって軸受の強度が低下するため好ましくない。
気孔は素地に分散し、液体燃料の高圧高速流通下で軸受が受ける強い摩擦を緩和し、軸受の摩耗を抑制する効果がある。気孔率が7%未満ではその効果が十分でない。一方、気孔率が17%を超えると強度が低下するので好ましくない。
Cu−Ni−Snで構成される金属マトリックスにおいて、Snを均一に分散分布させることで、2〜4.5質量%の少量のSnで有機酸を含む粗悪ガソリンに対し、優れた耐食性を付与する。
原料粉末として、粒径100メッシュ以下のCu−25質量%Ni粉末、粒径250メッシュ以下のCu−8質量%P粉末、粒径250メッシュ以下のSn粉末、黒鉛粉末、及び電解Cu粉末を用意した。これらの原料粉末を表1に示す組成になるように配合し、ステアリン酸を0.5質量%添加してV型混合機にて20分混合した後、所定の圧力でプレス成形して圧粉体を製作した。この圧粉体を、天然ガスと空気を混合し、加熱した触媒に通すことで分解変成させたエンドサーミックガス(吸熱型ガス)雰囲気中で、880〜960℃の範囲内の所定の温度で焼結し、続いてサイジングを行った。以上の工程により、外径:10mm×内径:5mm×高さ:5mmの寸法を有し、表1に示す組成成分の本発明軸受(以下、本発明例という)、及び比較としてSn含有量が2%未満の比較軸受(以下、比較例という)を製作した。
上記の本発明例と比較例の軸受について耐食試験を行った。
上記の本発明例と比較例の軸受について、ガソリンが狭い空間を高速で流通し、これを生起せしめるモータの高速回転によって軸受が高圧を受け、かつ速い流速のガソリンに曝される条件で耐摩耗試験を行った。外側寸法が長さ:110mm×直径:40mmの燃料ポンプに軸受を組み込み、この燃料ポンプをガソリンタンク内に設置した。インンペラの回転数:5,000〜15,000rpm、ガソリンの流量:50〜250リットル/時、軸受が高速回転より受ける圧力:最大500kPa、試験時間:500時間の条件にて実機実験を行った。試験後の軸受面における最大摩耗深さを測定した。その結果を表1に示す。
本発明例の合金の断面組織を走査型電子顕微鏡(SEM)で観察した。分析倍率は350倍とした。
本発明例の合金について、走査型電子顕微鏡(SEM)に付属するエネルギー分散型X線分光法(EDX)分析装置を用いて、金属マトリックスのNi、Sn、Cu、P、C各元素の分布状態を調べた。分析条件は、加速電圧20kVに設定し、軸受の断面組織について、Ni、Sn、Cu、P、C各元素のマッピング分析を行った。分析倍率は350倍とした。
Claims (2)
- 質量%で、10〜20%のNiと、2〜4.5%のSnと、0.05〜0.4%のPと、2〜7%のCとを含有し、残部がCu及び不可避不純物からなるとともに、Snが金属マトリックス中に均一に分散分布する金属組織を有し、かつ、7〜17%の気孔率を有し、気孔内に遊離黒鉛が分散分布することを特徴とするモータ式燃料ポンプ用焼結軸受。
- 請求項1に記載のモータ式燃料ポンプ用焼結軸受の製造方法であって、
Sn単体の粉末を含む原料粉末を、質量%で、10〜20%のNiと、2〜4.5%のSnと、0.05〜0.4%のPと、2〜7%のCとを含有し、残部がCu及び不可避不純物からなる組成になるように配合するステップと、原料粉末をプレス成形して圧粉体を製作するステップと、圧粉体を880〜960℃の範囲内の温度で焼結するステップとを備えたことを特徴とするモータ式燃料ポンプ用焼結軸受の製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2017127093A JP6769007B2 (ja) | 2017-06-29 | 2017-06-29 | モータ式燃料ポンプ用焼結軸受及びその製造方法 |
CN201880017946.5A CN110418853B (zh) | 2017-06-29 | 2018-06-28 | 马达式燃料泵用烧结轴承及其制造方法 |
PCT/JP2018/024684 WO2019004384A1 (ja) | 2017-06-29 | 2018-06-28 | モータ式燃料ポンプ用焼結軸受及びその製造方法 |
US16/492,520 US11441608B2 (en) | 2017-06-29 | 2018-06-28 | Sintered bearing for motor-type fuel pump and production method therefor |
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JP2017127093A JP6769007B2 (ja) | 2017-06-29 | 2017-06-29 | モータ式燃料ポンプ用焼結軸受及びその製造方法 |
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JP2019011484A JP2019011484A (ja) | 2019-01-24 |
JP6769007B2 true JP6769007B2 (ja) | 2020-10-14 |
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JP (1) | JP6769007B2 (ja) |
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WO (1) | WO2019004384A1 (ja) |
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JP3024153B2 (ja) * | 1990-02-07 | 2000-03-21 | オイレス工業株式会社 | 複層焼結摺動部材 |
WO1995030029A1 (fr) * | 1994-04-28 | 1995-11-09 | Nippon Steel Corporation | Materiau composite auto-lubrifiant a haute resistance utilise a haute temperature et son procede de production |
US7479174B2 (en) * | 2004-03-31 | 2009-01-20 | Mitsubishi Materials Pmg Corporation | Inner rotor and outer rotor of internal gear pump |
JP4521871B2 (ja) * | 2005-01-18 | 2010-08-11 | 株式会社ダイヤメット | 耐食性、耐摩耗性および高強度を有するモータ式燃料ポンプの軸受 |
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EP2511388B1 (en) * | 2009-12-07 | 2018-03-14 | Diamet Corporation | Sintered sliding member |
JP6121164B2 (ja) * | 2010-11-08 | 2017-04-26 | 株式会社ダイヤメット | Cu基焼結含油軸受 |
EP2639322B1 (en) | 2010-11-10 | 2015-08-26 | Diamet Corporation | Sintered bearing for motor-powered fuel injection pumps |
WO2013129226A1 (ja) * | 2012-02-29 | 2013-09-06 | 株式会社ダイヤメット | 耐摩耗性に優れた焼結合金 |
CN104204247B (zh) | 2012-03-13 | 2017-06-09 | Ntn株式会社 | 烧结轴承及其制造方法 |
JP2013217493A (ja) | 2012-03-13 | 2013-10-24 | Ntn Corp | 焼結軸受 |
JP5755599B2 (ja) * | 2012-05-15 | 2015-07-29 | 株式会社ダイヤメット | 耐食性、耐摩耗性及びなじみ性に優れたモータ式燃料ポンプ用焼結軸受 |
JP5496380B2 (ja) * | 2013-02-26 | 2014-05-21 | 株式会社ダイヤメット | 耐摩擦摩耗性に優れたCu−Ni−Sn系銅基焼結合金とその製造方法およびその合金からなる軸受材 |
JP6425943B2 (ja) | 2013-08-27 | 2018-11-21 | Ntn株式会社 | 燃料ポンプ用焼結軸受およびその製造方法 |
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JP6468766B2 (ja) | 2014-09-11 | 2019-02-13 | 株式会社ダイヤメット | 耐食性、耐熱性、耐摩耗性に優れた焼結摺動材及びその製造方法 |
JP6052336B2 (ja) * | 2015-05-25 | 2016-12-27 | 株式会社ダイヤメット | 耐食性、耐摩耗性及びなじみ性に優れたモータ式燃料ポンプ用焼結軸受の製造方法 |
JP2017009033A (ja) | 2015-06-22 | 2017-01-12 | オイレス工業株式会社 | 静圧気体軸受用の円筒状複合部材及びこの円筒状複合部材の製造方法並びにこの円筒状複合部材を具備した静圧気体軸受 |
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