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随着发动机性能指标的不断提高,压缩比及转速也相应提高,活塞环的工作务件也更为恶劣.所以,对活塞环要求有较高的耐磨性及良好的综合机械性能.通过对465Q-1ANE1发动机活塞环材料化学成分的检测以及400h的磨损试验,得出了以下结论:在活塞环的材料中里添加一定量的其他合金元素如Cr、Mn、Mo和V等,并进行相应的热处理,可以提高活塞环的耐磨性、强度和疲劳抗力. 相似文献
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针对某四缸汽油机出现的活塞环第一道气环卡死问题,运用故障树法查找原因。同时在试验验证中,采用硬度塞法对其活塞温度场进行实际测量,并对缸体缸孔进行装配变形检测,对活塞环槽进行切割和显微成像。通过以上验证分析发现,该活塞环槽下侧发生微熔。最后从加强活塞环槽强度及耐磨性角度出发,提出了增加环槽硬质阳极氧化的解决措施,并进行了实机实验,成功消除了活塞环槽微熔的现象。 相似文献
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《内燃机与配件》2014,(2)
<正>采用国外先进技术及设备,进行钢带环、钢环产品、相关设备及检测仪器的生产制造。公司技术及管理人员均有多年在知名龙头活塞环企业从事技术、生产管理的工作经验,并接受过日本活塞环公司的专业培训。通过消化吸收国内外先进的生产技术,不断改进完善质量管理体系,活塞环产品和专用机床设备质量稳定、可靠。已和国内外多家知名活塞环企业建立了稳定的业务关系,如江苏仪征、南京溧水、福建南平、辽宁营口等,并远销至泰国、越南、韩国、台湾等地的活塞环厂家。客户的需求就是我们的目标,客户的满意就是我们的追求。我们愿本着"以诚为本、合作双赢"的思想,广交天下朋友,诚迎新老客户,希望得到大家的支持和帮助! 相似文献
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程金段明皞张希孙鹏彭昌陞 《制造业自动化》2020,(8):37-38
重型柴油发动机活塞环柔性自动装配过程中,活塞环与环槽配合精度要求极高,而发动机活塞型号众多、供应商不同、产品批次不同,使得活塞环槽在活塞上的位置存在较大差异,造成搭载活塞环的设备找不到活塞上的环槽位置,给活塞环装配带来困难。本文采用视觉系统无接触测量的方法,简便、可靠、高效的定位活塞环槽位置,解决了活塞环槽定位问题,实现了多品种活塞的活塞环柔性自动化装配。 相似文献
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基于重复控制的数控系统伺服调节技术的研究 总被引:1,自引:1,他引:0
针对数控活塞环车削周期性控制的特点,应用重复控制理论对活塞环车床数控系统伺服调节技术进行了研究。以M序列信号作为输入信号,采用最小二乘法首先对数控伺服系统模型进行了系统辨识;以辨识所得到的整个闭环伺服系统模型为调节对象,进行了重复控制器的设计,构建了适合于伺服系统调节的重复控制器;以Matlab/Simulink为工具对所构建的重复控制器进行了仿真比较,系统跟随误差由原来94.2%减少到11.1%;同时在自行开发的数控系统上进行实际试验比较,系统跟随误差也由87.9%减少到24.7%。通过试验表明,基于重复控制的伺服调节技术能有效地抑制周期运动中的跟随误差。 相似文献
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通过超声波无损探伤和计算机控制技术,采用双路通道自动检测镶环活塞中Al-Fe的结合质量。检测系统功能强、操作方便和可靠性高。滚轴传动机构的伺服控制系统采用PWM控制技术,使用光电脉冲发生器作为速度检测元件实现闭环控制,检测速度稳定。经大量检测试验表明,其检测结果具有精度高和良好的重要性。 相似文献
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本文将直线电机用于中凸变椭圆活塞数控车削的X轴进给,设计了永磁直线电机伺服系统结构,建立了永磁直线电机的数学模型,采用PMAC的PID 速度/加速度前馈控制算法作为直线电机位置控制算法,将一弹簧阻尼施力装置加载于直线电机进给平台,用来模拟直线电机在加工中凸变椭圆活塞时所受切削力,试验结果验证了系统控制算法的合理性和可行性. 相似文献
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该文研究用于大型风力机变桨距位置伺服控制器,实现液压缸的高精度位置伺服控制。设计的伺服控制器还包括扰动控制器,采用模糊-PID复合控制算法,并具有输入限制器和死区补偿功能。经仿真研究,证实该位置伺服控制器性能好,能够满足大型风力机变桨控制要求。 相似文献
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Mao-Hsiung Chiang Chung-Chieh Chen Chung-Feng Jeffrey Kuo 《The International Journal of Advanced Manufacturing Technology》2009,43(9-10):841-851
High response and high efficiency velocity control of a hydraulic injection molding machine (HIMM) is requested especially for the process of high-tech industries, such as CD and DVD disks, plastic optical lens, light guide plates, etc. Instead of the hydraulic valve-controlled systems that have the problem of low energy efficiency but have been used widely in today’s HIMMs, the paper develops a high response and high energy efficiency electro-hydraulic pump-controlled system driven by a variable rotational speed AC servo motor for achieving high response and high efficiency velocity control in HIMMs. A constant displacement axial piston pump combined with the AC servo motor is developed in this research as the high response electro-hydraulic pump-controlled system for the HIMMs. For that, the control strategy, signed-distance fuzzy sliding mode control (SD-FSMC) is developed to simplify the fuzzy rule base through the sliding surface for practical applications. The developed high response variable rotational speed electro-hydraulic pump-controlled system controlled by SD-FSMC is implemented and verified experimentally for velocity control with various velocity targets and external loading conditions. Furthermore, the energy efficiencies of different experiments are analyzed and compared precisely by the power quality recorder used to measure the electrical power consumed by the AC servo motor. 相似文献
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To solve the problems of large volume, and low integration of traditional electro-hydraulic servo valve with constant pressure differential fuel metering device, a new two-dimensional three-way constant pressure differential fuel flow control servo valve (2D3WFFCSV) is developed. It innovatively adopts the advantages of lightweight of “two-dimensional hydraulic technology”, The constant differential pressure function and flow regulation function are integrated into a two-dimensional (2D) main spool with two degrees of freedom (rotational and axial degrees of freedom). The flow control process of 2D3WFFCSV is as follows: firstly, the armature of the torque motor and the two-dimensional piston are coaxially installed at the end of the two-dimensional piston, so the torque motor can directly drive the two-dimensional piston to rotate; secondly the “hydraulic servo screw mechanism”, which can amplify the power, is used to drive the two-dimensional piston to move in line; Finally, a pair of conversion mechanisms (roller group and spiral track conversion mechanism) are converted into the angular displacement of 2D main spool to control the area of flow valve port. The axial degree of freedom of 2D main spool realizes the function of constant differential pressure. To improve the flow control accuracy of the servo valve, the axial position of the 2D piston is detected by the linear displacement sensor (LVDT), and the signal is transmitted to the controller to realize the closed-loop control. To explore its open-loop characteristics, the mathematical models of torque motor, two-dimensional piston and main spool are established to obtain its open-loop transfer function. Then the AMESIM simulation model is built. To optimize the design of the system, through the dynamic simulation of the system, the influence of key parameters on the dynamic response of the system can be studied. An experimental study is carried out to verify the design feasibility of the servo valve. The experimental results show that under the condition of no-load and full-scale input, the closed-loop delay of the servo valve is 1.84%, the linearity is 2.14%, the step response time is 43 ms, and the dynamic frequency response is 38 Hz. The newly developed 2D3WFFCSV has the advantages of high integration, small size, light weight (801.5 g) and high response and control accuracy. It can replace the constant differential pressure, metering valve and hydraulic servo valve in the aeroengine fuel regulator. 相似文献
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