diminish the chordal action and oscillation
Japanese translation: 弦振動を低減する
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| 23:06 Nov 14, 2005 |
| English to Japanese translations [PRO] Tech/Engineering - Mechanics / Mech Engineering / silent chain | |||||||
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|  Selected response from: ken1 | ||||||
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| 3 | （チェーンの）滑りおよび振動を軽減（減少）する |
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| 3 | 弦振動を低減する |
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Answers
3 hrs confidence: 
（チェーンの）滑りおよび振動を軽減（減少）する Explanation: 'Chrdal' here is not related to musical instrumrnt. Here are answers to 26 of the most common questions regarding the care and performance of Diamond Chain. 1.ﾊﾊﾊSprockets - Hardened Teeth 2.ﾊﾊﾊSprockets - Chain Wrap 3.ﾊﾊﾊSprockets - Small Sprocket Size 4.ﾊﾊﾊDrive Ratio Calculation 5.ﾊﾊﾊConnecting Tool - Multiple Strand Chains 6.ﾊﾊﾊBreaking A Chain - Multiple Strand Chains 7.ﾊﾊﾊRough Roller Chain Operation - Marking on Interior Plates 8.ﾊﾊﾊRough Roller Chain Operation - Climbing Sprocket Teeth 9.ﾊﾊﾊRoller Chain - Corroded or Rusty 10.ﾊRoller Chain Failure - Broken Inner (Roller) Plates 11.ﾊRoller Chain failure - Broken, Bent, or Turned Pins 12.ﾊRoller Chain Stretch (Elongation) 13.ﾊRoller Chain Lubrication - Slow Speed 14.ﾊRoller Chain Lubrication - Moderate Speed 15.ﾊRoller Chain Lubrication - High Speed 16.ﾊRoller Chain Lubrication - Type, based on Temperature 17.ﾊRoller Chain Components - Connecting Link 18.ﾊRoller Chain Components - Offset Links 19.ﾊRoller Chain Components - Roller Links 20.ﾊRoller Chain Temperature Limitations 21.ﾊRoller Chain Types - Riveted & Cottered 22.ﾊRoller Chain Length Matching 23.ﾊRoller Chain - Multiple Strand 24.ﾊRoller Chain Tensioning 25.ﾊRoller Chain Length Measurement 26.ﾊRoller Chain - "Pre-stretching" or "Pre-loading" -------------------------------------------------------------------------------- 1. Sprockets - Hardened Teeth When are hardened tooth sprockets recommended?ﾊ ANSWER: Hardened tooth sprockets are recommended for any sprockets of 25 teeth or less and/or when the sprocket will operate in: Drives that are heavily loaded, Operated in abrasive conditions, High speed drives, or Drives requiring extremely long life.ﾊ Back to topﾊﾊ -------------------------------------------------------------------------------- 2. Sprockets - Chain Wrap What is the recommended minimum chain wrap in a roller chain drive?ﾊ ANSWER: The recommended minimum wrap angle of the smallest sprocket in the drive is 120｡. The wrap angle can be reduced to 90｡, if good chain tension adjustment is maintained. If chain tension is not closely maintained with less than 120｡ wrap, the chain can jump teeth, resulting in damage to the chain and/or the sprocket.ﾊ Note: For a sprocket ratio of 3:1 or less there will always be 120｡or more wrap on the small sprocket, regardless of the center distance.ﾊ Back to topﾊ -------------------------------------------------------------------------------- 3. Sprockets - Small Sprocket Size What is the smallest suggested sprocket sizes to minimize the effects of chordal action?ﾊ ANSWER: The smallest sprocket is usually the driver or input sprocket. As the chain enters and exits, it rises and falls as each pitch engages and disengages the sprockets. This movement, called chordal action, causes chain-speed variations (drive roughness) that may be objectionable in some applications. These variations can normally be minimized by increasing the size of the sprockets. To minimize the negative effects of chordal action, the following are suggested guidelines for the minimum number of teeth in the smallest sprockets: Slow speed drive (Drip type lubrication) - 12 teeth, Medium speed drive (Oil bath type lubrication) - 17 teeth, and High speed drive (Pumped lubrication) http://diamondchain.com/support/techfaqs.php The only disadvantage inherent in roller chain is a phenomenon known as "chordal action" which produces a slight pulsation in the output sprocket and becomes less pronounced as the number of sprocket teeth are increased. Generally, the elasticity of the chain, the clearances among parts, and the oil films will damp much of the chordal action in chain drives with large sprockets. Figure 3 illustrates "chordal action" for a 9 tooth and 4 tooth sprocket. Notice the difference in chordal rise. http://www.sdp-si.com/D757/HTML/D757P478.htm Reference: http://www.khkgears.co.jp/cals/cals/khk/KHK391_2.html Reference: http://www.wsd.nec-eng.co.jp/document/word/wrd_e_c.html |
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4 hrs confidence:
弦振動を低減する Explanation: Chordal actionというのはチェーンがギアの歯から離れるときに振動する挙動のことで日本語では弦振動と言っているようです。以下ご参照。 http://www.tytlabs.co.jp/japanese/review/rev324pdf/324_025to... そうすると日本語では確かにoscillationと重なってしまいますね。意味的には日本語はactionとoscillationが含まれていると解釈して一語にしてみました。 |
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