XiaoMi-AI文件搜索系统
World File Search System曲轴
使用有限元分析研究曲轴故障分析
摘要。曲轴是内燃机的关键部件之一，需要有效和精确的工作。在本研究中，研究的目的是识别曲轴中的应力状态，并通过有限元分析解释汽车曲轴的故障和曲轴的疲劳寿命。使用 SolidWorks 设计和开发曲轴模型的 3D 实体造型。对 L 型双缸曲轴进行静态结构和动态分析，以确定曲轴关键位置的最大等效应力和总变形。使用疲劳工具在动态载荷条件下对模型进行测试，以确定疲劳寿命、安全系数、等效交变应力和损伤。本研究的结果表明，曲轴有明显的疲劳裂纹，属于疲劳断裂。疲劳断裂的发生只是由于在循环弯曲和扭转作用下润滑孔边缘的扩展和起始裂纹所致。总体而言，曲轴在静态和疲劳载荷下都是安全的。在动态分析中，应避免频率响应曲线中获得的临界频率，否则可能会导致曲轴失效。
曲轴失效分析的有限元分析研究
摘要。曲轴是内燃机的关键部件之一，需要高效、精确地工作。本研究的目的是通过有限元分析确定曲轴中的应力状态，并解释汽车曲轴的故障和曲轴的疲劳寿命。使用 SolidWorks 设计和开发了曲轴模型的 3D 实体造型。对 L 型双缸曲轴进行静态结构和动态分析，以确定曲轴关键位置的最大等效应力和总变形。使用疲劳工具在动态载荷条件下测试模型，以确定疲劳寿命、安全系数、等效交变应力和损伤。本研究的结果表明，曲轴有明显的疲劳裂纹，属于疲劳断裂。疲劳断裂的发生仅归因于在循环弯曲和扭转下润滑孔边缘的扩展和起始裂纹。总体而言，曲轴对于静态和疲劳载荷都是安全的。在动力学分析中，应避开频响曲线中得到的临界频率，否则可能造成曲轴失效。
提高组合式曲轴材料强度的途径
近来，对提高船舶低速柴油机效率的需求日益增加。为此，神户制钢所新开发了一种用于半组合式曲轴的廉价低合金钢。这种钢具有高屈服点和高疲劳强度，同时避免了大型锻钢产品中经常发生的淬火开裂风险。曲轴由多种钢种（包括新开发的钢）制造，并评估了从其主要部件上采集的钢件样品的材料性能。结果证实，新开发的钢具有优于传统钢的机械性能和疲劳强度。预计这种新开发的钢将应用于下一代发动机，并有助于遵守预计将变得越来越严格的环境法规。
..JEPPESEN® - 航空工程
直列式发动机演变为 V 型发动机。两排气缸称为气缸组，与单个曲轴成 45 度、60 度或 90 度角。两排气缸通常比直列式发动机产生更大的马力。由于气缸组共用一个曲轴箱和一个曲轴，因此 V 型发动机具有合理的功率重量比和较小的迎风面积。活塞可以位于曲轴上方或下方。大多数 V 型发动机有 8 个或 12 个气缸。V 型发动机可以采用液体冷却或空气冷却。第二次世界大战期间开发的 V-12 发动机实现了所有往复式发动机中最高的马力额定值。今天，V 型发动机通常用于经典军用和实验性赛车。[图 1-5]
内燃机
第四学年 内燃机 内燃机是通过运动将热燃料能量转化为能量的机器。它以扭矩的形式从曲轴获取能量。内燃机用于汽车、铁路、航空和水运。 1. 根据其活动原理，发动机分为三类： a) 活塞发动机 - 具有往复式活塞运动。 - 活塞做圆形运动（汪克尔发动机） b) 涡轮发动机 = 叶片机 c) 火箭发动机 2. 有三种方式将热能传递到内燃机中： a) 在发动机工作舱中燃烧燃料混合物和空气 b) 在涡轮室内燃烧 c) 将热量从燃烧室传递到加热器（斯特林发动机） 3. 根据燃料状态，发动机进一步分为： a) 气体 - 燃料为气体（甲烷、丙烷-丁烷、天然气） b) 液体 - 汽油、柴油 c) 各种燃料（汽油-气体） 4. 根据燃料点火方式，发动机分为： a) 火花点火 - 当压缩冲程位于上止点前方时，混合气由电火花点燃 b) 压燃 - 混合气由当混合气在上止点前方被压缩时产生的热量燃烧 5. 根据工作回路中的冲程数，发动机分为： a) 二冲程- 工作循环在曲轴旋转一圈时完成 b) 四冲程 - 工作循环在曲轴旋转两圈时完成
磁性转速传感器 MSP 系列
如果没有可用的安装位置，则在飞轮壳上钻孔并攻丝。螺纹孔应垂直于曲轴中心线并位于齿圈齿的中心。对孔进行点加工以提供平坦表面，以便固定锁紧螺母（请参阅内页上的图表了解磁性转速传感器的螺纹尺寸）。
制造过程和型式批准等 - KR e-class
第 1 节。一般····················································································································· 3 第 2-1 节。轧制钢材·········································································································· 7 第 2-2 节。轧制钢材半成品··········································································· 14 第 2-3 节。用于高热输入焊接的轧制钢材 ····························· 16 第 3 节。钢管 ································································································ 18 第 4 节。铸件和钢锻件 ·· ...第 5 节。特殊要求的曲轴 ································································ 22 第 6 节。铝合金 ········································································································································· 25 第 7-1 节。铜合金铸件······························································································· 28 第 7-2 节。铜和铜合金管 ··············································································· 29 第 8 节。特殊铸铁阀门 ·· ... ·· ...链条配件· ... ·· ... ·························································································· 50
霍尔效应传感及应用
流量传感器（数字）................................................................................................................ 63 排序传感器............................................................................................................................... 63 接近传感器............................................................................................................................... 64 办公机器传感器....................................................................................................................... 64 可调电流传感器....................................................................................................................... 65 线性反馈传感器....................................................................................................................... 66 多位置传感器.................................................................................................................... 66 微处理器控制传感器.................................................................................................................... 67 防滑传感器.................................................................................................................................... 67 门联锁和点火传感器............................................................................................................. 67 变速箱安装速度传感器............................................................................................................. 68 曲轴位置或速度
制造流程和型式认可等 - Zdocs.pub
第 1 节。一般····················································································································· 3 第 2-1 节。轧制钢材··········································································································· 7 第 2-2 节。轧制钢材半成品··············································································· 15 第 2-3 节。用于高热输入焊接的轧制钢材 ····························· 17 第 3 节。钢管 ································································································ 19 第 4 节。铸件和钢锻件 ·· ...第 5 节。特殊要求的曲轴 ······························································· 23 第 6 节。铝合金 ··································································································································· 26 第 7-1 节。铜合金铸件······························································································· 29 第 7-2 节。铜和铜合金管 ············································································· 30 第 8 节。特殊铸铁阀门 ···················································································································· 34 第 9 节。锚·· ...船用链条附件···································································································· 39 第 10-3 节。海上链条和链条附件································································ 41 第 11 节。钢丝绳· ... ·· ... ···························································································· 55