JP7488633B2 - 複列自動調心ころ軸受 - Google Patents
複列自動調心ころ軸受 Download PDFInfo
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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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/06—Ball or roller bearings
- F16C23/08—Ball or roller bearings self-adjusting
- F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
- F16C23/086—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for rolling elements
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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
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
- F16C25/08—Ball or roller bearings self-adjusting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/70—Bearing or lubricating arrangements
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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
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
-
- 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
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
- F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
- F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
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- 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
- F16C19/50—Other types of ball or roller bearings
- F16C19/505—Other types of ball or roller bearings with the diameter of the rolling elements of one row differing from the diameter of those of another row
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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
- F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
- F16C2206/02—Carbon based material
- F16C2206/04—Diamond like carbon [DLC]
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- F16C2240/34—Contact angles
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- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
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- F16C2240/54—Surface roughness
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- 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
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/10—Application independent of particular apparatuses related to size
- F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
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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
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- 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
- F16C33/34—Rollers; Needles
- F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
内輪と、
球面状の軌道面を有する外輪と、
前記内輪と外輪との間に介在する、軸受幅方向に並ぶ2列の複数のころとを備え、
前記2列のころは、それぞれ、前記外輪の軌道面に沿う断面形状の外周面を有する、複列自動調心ころ軸受であって、
一方の列のころの接触角θ1と他方の列のころの接触角θ2との比が、0.25≦θ1/θ2≦0.5の範囲にあり、
前記一方の列側の軸受端面から、両列の接触角をなす2本の作用線の交点までの軸受幅方向距離B1と、前記他方の列側の軸受端面から前記交点までの軸受幅方向距離B2との比が、0.5≦B1/B2≦0.6の範囲にある。
0≦β2≦α2
で示される関係にあってもよい。
なお、前記「保持器の傾斜角β2」は、保持器の柱部におけるポケット面が円筒面である場合、その円筒面の中心線が保持器中心線(軸受中心軸心)に対して成す角度である。
このとき、 0≦β2≦α2
とすることで、ころの姿勢安定性が損なわれることはない。
また、このような保持器形状とすることで、左右列非対称設計特有の組み込み性の低下を防ぎ、ころを安定して保持することができる。
このDLC皮膜の膜厚が2.0μm以上であり、
前記ころの母材の外表面の面粗さが、
Ra≦0.3、かつRΔq≦0.05
であり、
前記多層構造のDLC皮膜における各層の膜硬さは、段階的に外層側の層が高くなるようにしてもよい。
前記DLCは、ダイヤモンドライクカーボン(Diamond-like Carbon )の略称である。
この実施形態の複列自動調心ころ軸受1は、前記他方の列のころ5を保持する保持器10Rの傾斜角β2が、前記他方の列のころ5の最大径を成す位置の傾斜角度であるころ最大径角α2に対して、次式、
0≦β2≦α2
で示される関係となっている。
なお、前記「保持器10Rの傾斜角β2」は、保持器10Rの柱部12におけるポケット面12aが円筒面である場合、その円筒面の中心線C2が保持器中心(軸受中心軸心O)に対して成す角度が保持器傾斜角β2である。
このとき、 0≦β2≦α2
とすることで、ころ5の姿勢安定性が損なわれることはない。
また、このような保持器10Rの形状とすることで、左右列非対称設計特有の組み込み性の低下を防ぎ、ころ5を安定して保持することができる。
前記ころ4,5の母材の外表面の面粗さは、算術粗さRa、および二乗平均平方根傾斜RΔqで、 Ra≦0.3、かつRΔq≦0.05
である。
前記多層構造のDLC皮膜9における各層9a,9b,9cの膜硬さは、段階的に外層側の層が高くなる。
これらの軸受部材において、DLC皮膜9が形成される面の硬さが、ビッカース硬さでHv650以上であることが好ましい。Hv650以上とすることで、DLC皮膜9(下地層)との硬度差を少なくし、密着性を向上させることができる。
保持器10Rの環状部11の外径Doは、ころ5の配列のピッチ円直径PCDよりも大きく、環状部11の内径Diはピッチ円直径PCD(図10)よりも小さい。
環状部11の外径Doは、例えば、PCD×102~105%、である。
環状部11の内径Diは、例えば、PCD×95~98%、である。
柱部12の長さL、詳しくは柱部12のポケット7を構成する部分の長さLは、ころ長さL2(図1、図10)の65%以下とされている。
ただし、テーパー形状部13は、長く形成し過ぎると、ころ5の保持性が低下するため、ころ5の最大径となる位置M(図16)上またはこの位置Mよりも柱部先端側から始まるようにしており、そのため、ころ5の保持性が確保される。
また、ころ5の組み込み性からは、テーパー形状部13の先端の径方向厚さd(図17)が薄いほど好ましいが、円筒面からなるポケット面12aは柱部12の先端側からドリル加工で形成するため、先端に平面を残す必要があり、加工に支障のない範囲で薄くすることが好ましい。
これら保持器10L、10Rは、例えば図19の例のように、柱部12の先端にテーパー形状部13を持たない形状であってもよく、さらにポケット面12aを成す円筒面の中心線C2が、柱部12が延びる方向に対して傾斜していない形状であってもよい。
2…内輪
3…外輪
3a…軌道面
4,5…ころ
6,7…小つば
8…中つば
9…DLC皮膜
11…環状部
12…柱部
13…テーパー形状部
15…ポケット
26…主軸
A1,A2…ころ長さの中央
B…軸受幅
B1,B2…軸受の端面から作用線の交点までの軸受幅方向距離
D1max,D2max…最大径
E1,E2…軸受の端面
L1,L2…ころの長さ
P…作用線の交点
θ1,θ2…接触角
Claims (4)
- 内輪と、
球面状の軌道面を有する外輪と、
前記内輪と外輪との間に介在する、軸受幅方向に並ぶ2列の複数のころと、
前記2列の複数のころを保持する保持器と、を備え、
前記2列のころは、それぞれ、前記外輪の軌道面に沿う断面形状の外周面を有する、複列自動調心ころ軸受であって、
一方の列のころの接触角θ1と他方の列のころの接触角θ2との比が、0.25≦θ1/θ2≦0.5の範囲にあり、
前記一方の列側の軸受端面から、両列の接触角をなす2本の作用線の交点までの軸受幅方向距離B1と、前記他方の列側の軸受端面から前記交点までの軸受幅方向距離B2との比が、0.5≦B1/B2≦0.6の範囲にあり、
前記保持器は、
前記軸受幅方向外側に延びる複数の柱部を有し、
前記複数のころのそれぞれが前記複数の柱部間に形成されるポケットに保持され、
前記他方の列のころを保持するポケットの内側面であるポケット面が円筒面であり、
前記円筒面の中心線が軸受中心軸心に対して成す角度である傾斜角β2が、前記他方の列のころの最大径を成す位置の傾斜角度であるころ最大径角α2に対して、次式、
0≦β2≦α2
で示される関係にある、
複列自動調心ころ軸受。 - 請求項1に記載の複列自動調心ころ軸受において、前記一方の列のころ長さL1と、前記他方の列のころ長さL2との比が、0.9≦L1/L2≦1.0の範囲にある、複列自動調心ころ軸受。
- 請求項1または請求項2に記載の複列自動調心ころ軸受において、前記各ころが、外周面に多層構造のDLC皮膜を有し、
このDLC皮膜の膜厚が2.0μm以上であり、
前記ころの母材の外表面の面粗さが、それぞれJIS B 0601:2013に準拠して測定される、算術平均粗さRa、粗さ曲線の二乗平均平方根傾斜RΔq、粗さ曲線の最大山高さRpについて、
Ra≦0.3、かつRΔq≦0.05
であり、
1≦Rp/Ra≦2を満たし、
前記多層構造のDLC皮膜における各層の膜硬さは、段階的に外層側の層が高くなる、複列自動調心ころ軸受。 - 請求項1ないし請求項3のいずれか1項に記載の複列自動調心ころ軸受において、風力発電装置の主軸の支持に用いられる複列自動調心ころ軸受。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19788217.8A EP3783237B1 (en) | 2018-04-20 | 2019-04-17 | Double-row self-aligning roller bearing |
PCT/JP2019/016453 WO2019203265A1 (ja) | 2018-04-20 | 2019-04-17 | 複列自動調心ころ軸受 |
CN201980026335.1A CN111989500B (zh) | 2018-04-20 | 2019-04-17 | 多排自动调心滚子轴承 |
DK19788217.8T DK3783237T3 (da) | 2018-04-20 | 2019-04-17 | Dobbeltrækket, selvjusterende rulleleje |
US17/071,368 US11306776B2 (en) | 2018-04-20 | 2020-10-15 | Double-row self-aligning roller bearing |
JP2024017030A JP2024040292A (ja) | 2018-04-20 | 2024-02-07 | 複列自動調心ころ軸受 |
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JP2011226638A (ja) | 2010-03-30 | 2011-11-10 | Ntn Corp | 転がり軸受 |
JP2016186355A (ja) | 2015-03-27 | 2016-10-27 | Ntn株式会社 | 転がり軸受用保持器および転がり軸受 |
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DE102015204970A1 (de) * | 2015-03-19 | 2016-09-22 | Schaeffler Technologies AG & Co. KG | Wälzlager, beispielsweise einer Windkraftanlage |
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JP2011226638A (ja) | 2010-03-30 | 2011-11-10 | Ntn Corp | 転がり軸受 |
JP2016186355A (ja) | 2015-03-27 | 2016-10-27 | Ntn株式会社 | 転がり軸受用保持器および転がり軸受 |
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