Measuring Top Point of Foreign Diesel Engines Valve Cam Locus
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摘要: 根据目前国内中外合资企业的特点, 阐述在引进国外先进柴油机时, 针对配气凸轮外形精密测量时出现的技术问题, 采用物理数学方法, 对其数值进行科学分析研究, 使其测量偏差在0.0 1mm范围内, 达到理想逼近Abstract: According to the trait of present domestic joint venture, this paper discusses how to use physical mathematic method to scientifically analyze the value of the valve cam locus, in order that the measuring deviation will be at the range of 0 01 mm and reach the ideal approach, when meeting with the technical problem of precise measuring valve cam locus of the advanced foreign diesel engine.
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Key words:
- diesel engine /
- valve cam /
- measure /
- value correction
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表 1 计算数值
α f (δ+α) /mm f (-δ+α) /mm f (δ+α) -f (-δ+α) /mm 2f′ (ξ) /mm· (°)-1 δ/ (°) 181 9.7398 9.7402 -0.0004 -0.005000 0.0800 183 9.7240 9.7245 -0.0005 -0.000287 0.0575 185 9.6820 9.6840 -0.0020 -0.053500 0.0374 191 9.4232 9.4200 0.0032 -0.121000 -0.0260 196 9.0442 9.0385 0.0057 -0.177200 -0.0320 201 8.5285 8.5151 0.0134 -0.237500 -0.0560 206 7.8722 7.8540 0.0182 -0.289800 -0.0630 211 7.0832 7.0603 0.0229 -0.341000 -0.0670 216 6.1700 6.1400 0.0300 -0.387900 -0.0770 221 5.1405 5.1052 0.0353 -0.434000 -0.0810 226 4.0050 3.9685 0.0365 -0.472000 -0.0770 231 2.7820 2.7568 0.0252 -0.503500 -0.0500 以下为正值 表 2 校准后的升程值
α/ (°) 左升程/mm 右升程/mm 0 9.74069 9.74069 20 8.58070 8.58240 25 7.93210 7.93400 30 7.15550 7.15760 35 6.24980 6.25280 40 5.22870 5.23510 45 4.10060 4.10740 50 2.89610 2.89180 表 3 第一次测量结果
α/ (°) 测机左角度 左升程/mm 测机右角度 右升程/mm 20 246°6′37″ 8.54850 286°6′37″ 8.62025 25 241°6′37″ 7.88930 291°6′37″ 8.12400 295°6′37″ 7.98500 30 236°6′37″ 7.58150 296°6′37″ 7.84170 297°6′37″ 7.21660 35 231°6′37″ 6.18945 301°6′37″ 6.32070 40 226°6′37″ 5.16150 306°6′37″ 5.30650 45 221°6′37″ 4.02875 311°6′37″ 4.18700 50 216°6′37″ 2.81550 316°6′37″ 2.97525 表 4 第二次测量结果
α/ (°) 测机左角度 左升程/mm 测机右角度 右升程/mm 20 246°26′56″ 8.5860 286°26′56″ 8.5820 25 241°26′56″ 7.9402 291°26′56″ 7.9375 30 236°26′56″ 7.1612 296°26′56″ 7.1590 35 231°26′56″ 6.2565 301°26′56″ 6.2560 40 226°26′56″ 5.2350 306°26′56″ 5.2358 45 221°26′56″ 4.1080 311°26′56″ 4.1080 50 216°26′56″ 2.8984 316°26′56″ 2.8900 -
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