混凝土搅拌运输车传动系统的分析与动力匹配

通过对混凝土搅拌运输车在各种工况下运行的分析(以10m3混凝土搅拌运输车为例),介绍了上装部分传动系统的设计方案和主要参数的确定,以及各元件的选型,并对整个系统的扭矩和功率进行了计算及校核,确保了设计的合理性和运行的可靠性。     

混凝土搅拌输送车液压控制系统设计

对目前混凝土搅拌输送车液压控制系统设计中的关键问题--搅拌筒的恒速控制问题和液压系统冲击问题进行了探讨.总结了目前存在的各种恒速控制方式,进行了分析比较,得出了在目前条件下实现搅拌筒的恒速控制,以采用带恒速阀的液压变量柱塞泵、低速大扭矩马达、减速机、双向缓冲阀的配置为最佳;并提出了2种解决液压系统冲击的方法,即高压溢流保护和伺服排量控制.     

混凝土搅拌车液压传动系统动力分析与匹配

通过对混凝土搅拌车在各种工况下运行的分析(以10m~3混凝土搅拌运输车为例),介绍了上装部分传动系统的设计方案和主要参数的确定,以及各元件的选型,并对整个系统的扭矩和功率进行了计算及校核,确保了设计的合理性和运行的可靠性。     

混凝土搅拌车液压驱动系统及取力器匹配校核

根据国内外混凝土搅拌运输车的设计经验、计算方法、试验数据和经验参数,总结了几种常用的混凝土搅拌运输车液压驱动系统和取力器匹配的经验校核计算方法,为同类车型的设计提供了参考。     

混凝土搅拌输送车拌筒驱动阻力矩和驱动功率的计算

混凝土搅拌输送车的设计计算中,混凝土的几何形状复杂,拌筒阻力矩的计算困难,从而影响了驱动功率的计算与确定.针对上述问题列举、比较了国内两种搅拌阻力矩的算法,同时根据实验数据,进行曲线拟合,得出了驱动阻力矩的简便计算公式,进而计算驱动功率.     

半挂水泥混凝土运输车液压驱动系统设计

就大型半挂水泥混凝土搅拌运输车液压驱动系统的设计计算进行了探讨．在系统功率确定方面，采用类比法用实验将已有容量混凝土搅拌车在稳定工况下，搅拌功率与容量的曲线找出。再用最小二乘法拟合得到装载容量与搅拌功率的关系式，确定搅拌功率。根据现有容量水泥搅拌的峰值与稳态功率比例系数，确定了本系统的最大功率并以此为依据确定泵、马达等主要元件的参数。     

混凝土搅拌运输车液压技术的应用及趋势

目前国内混凝土搅拌运输车液压技术主要应用于搅拌筒驱动系统,仅满足于其使用性能的要求。为此,通过对国内外先进的混凝土搅拌运输车液压技术的应用分析,提出了混凝土搅拌运输车液压技术的应用及趋势。     

基于DSP的混凝土搅拌输送车恒速传动控制器的设计

给出了一种基于DSP(TMSLF2407A)设计的混凝土搅拌输送车电子恒速传动控制器.采用了PID算法对速度闭环控制,并用软件解决了搅拌筒换向峰值冲击问题,详细介绍了系统的总体设计方案.     

混凝土搅拌运输车液压传动系统设计

本文简要介绍了混凝土搅拌运输车液压系统的取力方式、载荷分析和基本原理。以10m^3混凝土搅拌车为例,重点介绍了混凝土搅拌率液压传动系统的设计要点。     

基于UG的混凝土搅拌输送车拌筒螺旋线参数化设计

推导了混凝土搅拌输送车螺旋线的理论公式,并通过UG编程实现了通过拌筒的设计参数进行筒体和螺旋线的一体设计。     

Investigation of active torsion bar actuator configurations to reduce vehicle body roll

The increasing popularity of sport utility/light-duty vehicles has prompted the investigation of active roll management systems to reduce vehicle body roll. To minimize vehicle body roll and improve passenger comfort, one emerging solution is an active torsion bar control system. The validation of automotive safety systems requires analytical evaluation and laboratory testing prior to implementation on an actual vehicle. In this article, a computer simulation tool and accompanying hardware-in-the-loop test environment are presented for active torsion bar systems to study component configurations and performance limits. The numerical simulation illustrates that the hydraulic cylinder extension limits the active torsion system’s ability to provide body roll angle reduction under various driving conditions. To compare the control system’s time constant and body roll minimization capabilities for different hydraulic valve assemblies and equivalent hose lengths, an experimental test stand was created. For a typical hydraulic pressure and hose diameter, the equivalent hose length was not a key design variable that impacted the system response time. However, the servo-valve offered a quicker transient response and smoother steady-state behavior than the solenoid poppet actuators that may increase occupant safety and comfort.     

Investigation of active torsion bar actuator configurations to reduce vehicle body roll

The increasing popularity of sport utility/light-duty vehicles has prompted the investigation of active roll management systems to reduce vehicle body roll. To minimize vehicle body roll and improve passenger comfort, one emerging solution is an active torsion bar control system. The validation of automotive safety systems requires analytical evaluation and laboratory testing prior to implementation on an actual vehicle. In this article, a computer simulation tool and accompanying hardware-in-the-loop test environment are presented for active torsion bar systems to study component configurations and performance limits. The numerical simulation illustrates that the hydraulic cylinder extension limits the active torsion system's ability to provide body roll angle reduction under various driving conditions. To compare the control system's time constant and body roll minimization capabilities for different hydraulic valve assemblies and equivalent hose lengths, an experimental test stand was created. For a typical hydraulic pressure and hose diameter, the equivalent hose length was not a key design variable that impacted the system response time. However, the servo-valve offered a quicker transient response and smoother steady-state behavior than the solenoid poppet actuators that may increase occupant safety and comfort.     

石太客运专线板式无砟轨道施工成套技术研究

结合石太客运专线工程特点,特别是针对长大隧道内板式无砟轨道的施工,开展了CRTSⅠ型轨道板施工技术与工艺的研究以及配套装备的研制。施工实践证明,成套技术效果良好,施工质量满足相关标准的要求,其全自动水泥乳化砂浆搅拌车具有较大的创新性,鉴定认为技术水平达到了国际先进。     

混凝土搅拌运输车主、副车架的设计

对混凝土搅拌运输车的主、副车架进行了定性和定量的受力分析,从中推导出主、副车架的简化强度计算方法和强度校核公式。并以SX5254GJBDM364混凝土搅拌运输车为例进行了实例分析和计算。     

IPF-85B-2混凝土泵车泵送部分液压系统常见故障浅析

介绍了IPF-85B-2泵车中混凝土泵送部分3大液压回路系统的组成、工作原理及结构特点。根据混凝土泵送部分液压系统常见故障现象,判断故障产生在哪个回路系统中,对产生故障的回路系统进行分析,就能较容易地找出发生故障的原因及部位,并及时对各部分进行修理。该方法具有通用性,可用于实际工作中,对混凝土泵机也可适用。     

Active Roll Control of Articulated Vehicles

This paper describes an investigation into active roll control of articulated vehicles. The objective is to minimise lateral load transfer using anti-roll bars incorporating low bandwidth hydraulic actuators. Results from handling tests performed on an articulated vehicle are used to validate a nonlinear yaw/roll model of the vehicle. The methodology used to design lateral acceleration controllers for vehicles equipped with active anti-roll bars is developed using a simplified linear articulated vehicle model. The hardware limitations and power consumption requirements of the active elements are studied. The controller is then implemented in the validated articulated vehicle model to evaluate the performance of an articulated lorry with active anti-roll bars. The simulation results demonstrate the possibility of a significant improvement in transient roll performance of the vehicle, using a relatively low power system (10 kW), with low bandwidth actuators (5 Hz).     

汽车助力转向系统及其相关标准分析

对汽车用机械液压助力转向系统、电子液压助力转向系统和电动助力转向系统的原理、优点、缺点及相关标准进行了阐述和分析。     

预应力混凝土连续弯箱梁桥同步顶升纠扭施工

既有预应力混凝土连续弯箱梁桥在运营阶段经常出现支座变形、脱空及梁体扭转、偏位等病害,使桥梁结构受力趋于不利状态。以上海市一座匝道桥梁加固处理为对象,在对该桥病害原因进行分析的基础上,介绍采用PLC液压同步技术对桥梁进行整体同步顶升(不对称布顶)更换支座、纠扭、增设支座调整扭矩与支座反力等改造措施。实施结果表明:同步顶升控制系统较好地保证了顶升位移的精度;支座反力测定简便、可靠;病害弯桥基本恢复到原设计状态,实施效果良好。