An investigation into the cause of loss of containment from the supply of mini-bulk lubricants

An Intermediate Bulk Container (IBC) was punctured during its handling, releasing oil onto soil at an environmentally-sensitive region of Australia. The telehandler did not pierce the plastic of the IBC directly (as was expected) but rather one of the tynes had caught on the underside of the metal base plate, despite numerous controls being in place at time of spill, revealing a previously unreported mechanism for a fluid spill from handling of petroleum hydrocarbons. The diverse investigation team used a root cause analysis (RCA) technique to identify the underlying cause: the inspection process was inadequate with contributing factors of not using a spotter and design of IBC did not anticipate conditions. Engineering controls were put in place as part of the change management process to help prevent spills from occurring from piercing from telehandler tynes on the current project site.     

蓄能器在叉车节能技术中的应用

在确定蓄能器回收势能液压系统的基础上,分析皮囊式蓄能器初始容积、充气压力等参数对叉车节能效果的影响,并通过试验进行验证,对推动叉车节能技术的研究有积极作用.     

叉车制动方向稳定性分析与研究

本文对叉车几种不同工况制动进行了受力分析，并建立了力学模型，分析和研究了前、后制动器制动力分配曲线Ｉ、β和同步附着系数Φ的关系，求取了叉车制动器制动力分配系数。对叉车制动器的设计具有指导意义。     

形貌优化在某型叉车机罩设计中的应用

形貌优化是在材料成本不变的前提下提高结构刚度和强度的一种方法.简要介绍HyperWorks形貌优化计算流程,并以某型叉车机罩为例,利用Hypermesh建模工具和OptiStruct优化工具对其进行形貌优化设计.结果表明,形貌优化后的机罩刚度和强度相对原始设计方案有较大改进.这种设计思路大大减少了传统机罩设计中花费在不...     

叉车多路阀倾斜自锁阀结构改进设计和研究

国内16 t以下叉车多路阀均采用在阀杆里装自锁阀芯、弹簧等结构,来满足叉车门架前倾自锁的安全要求.对于这种内置式结构形式,在现行生产和使用中存在加工工艺复杂,加工周期长,产品合格率低等缺陷,而且易引起倾斜液压缸回油背压过高造成系统油温升高等诸多问题.新结构将内置在阀杆中的自锁阀改换成安装在阀体上的外置式负载控制阀,其压...     

港口仓库叉车工作循环分析

本文以现场调研和实测为基础，对港口仓库使用的ＣＰＣＤ２５型叉车的工作循环进行了较为详尽的分析。文中所有数据均为跟车实测所得。本文的结论为该型号叉零部件载荷谱的编制提供基础数据，对其它型叉车载荷谱的分析也可做为借鉴和参考。     

2t叉车液压泵齿轮箱传动轴装配同轴度的质保体系

说明确保 2t叉车液压齿轮箱和传动轴的装配同轴度的重要性 ,介绍车体架零件加工、整体焊接质保体系、传动机组加工装配质保体系及液压泵齿轮箱质保体系。     

叉车配置属具后允许起重量的确定及过载保护

本文根据叉车的稳定性,构件强度、安全性和工作中实际应用情况来讨论叉车配置属具后允许起重量以及由此引伸的叉车过载保护问题。     

Development of integrated fuel cell hybrid power source for electric forklift

A hybrid drivetrain comprising a 16 kW polymer electrolyte membrane fuel cell system, ultracapacitor modules and a lead-acid battery was constructed and experimentally tested in a real counterweight forklift application. A scaled-down version of the hybrid system was assembled and tested in a controlled laboratory environment using a controllable resistive load. The control loops were operating in an in-house developed embedded system. The software is designed for building generic control applications, and the source code has been released as open source and made available on the internet. The hybrid drivetrain supplied the required 50 kW peak power in a typical forklift work cycle consisting of both loaded and unloaded driving, and lifting of a 2.4 tonne load. Load variations seen by the fuel cell were a fraction of the total current drawn by the forklift, with the average fuel cell power being 55% of nominal rating. A simple fuel cell hybrid model was also developed to further study the effects of energy storage dimensioning. Simulation results indicate that while a battery alone significantly reduces the load variations of the fuel cell, an ultracapacitor reduces them even further. Furthermore, a relatively small ultracapacitor is enough to achieve most of the potential benefit.     

基于故障树的叉车液压系统故障诊断研究

将故障树分析法运用于叉车液压系统的故障诊断中,针对液压系统的失效模式及故障机理,建立了故障树,并进行故障分析与排除。实践证明,该方法简便、可靠、实用,用于液压系统故障诊断,能取得预期的效果。