共查询到20条相似文献,搜索用时 593 毫秒
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液压元件的质量是液压系统可靠工作的核心基础,因此对液压元件进行性能检测,对于减少后期设备故障,并为故障分析提供相关依据具有重要意义。拟定了检测系统的整体测试原理方案,液压元件检测系统公称压力为32MPa,测试压力为32MPa,公称流量为160L/min。对该试验台各个组件进行了选型和装配设计,包括各个集成块单元组件的装配设计,最终完成了液压元件检测试验装置中各个集成块、泵站及检测台台架、被试阀阀板等系统检测单元的总体装配设计。在具体方案实施中采用了二维设计与三维设计相结合的方式,以二维设计为主,三维模拟设计为辅,完成了对液压元件检测装置的结构设计。 相似文献
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利用液压传动基础理论对起重机液压系统中主要元件进行选型计算和校核,了解液压元件的性能特性,重点研究起重机液压元件选型计算的方法和步骤,对工程设计研究有较好的启迪作用。首先对起重机进行结构件进行受力计算,选定最大受力工况下计算得出液压执行元件的最大受力和方向。对主要液压元件如液压马达、液压泵、液压油缸、减速机、风冷器和平衡阀等进行计算及选型。起重机设计人员可以深入了解主要液压元件的选型计算方法,可以更加方便快捷地设计海洋平台起重机的液压系统。 相似文献
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以梨园河矿1341(3)工作面为研究对象,对液压支架进行了初步选型设计,在初次选型过程中所采用的方法是系统分析比较法。同时,简单介绍了液压支架的选型设计的原则,以及对液压支架的结构要求,并基于矿山压力理论就液压支架选型设计中所涉及到的主要参数进行了计算。最后通过计算和分析确定了大采高综采工作面液压支架的型号为ZY10800/30/65D型。 相似文献
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介绍了船用液压马达的选型方法现状,阐述了各类液压马达的特点和传统选型的方法,提出并举例说明了一种通过M A TLA B仿真软件建模来分析液压马达特性的选型方法,为液压马达选型提供了新的途径。 相似文献
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杨济 《China Equipment》2009,(6X):153-153
在船舶轮机工程设备中,船舶舵机是相当重要的设备,由于其结构比较复杂,其故障分析较为困难,本文介绍了舵机故障分析系统、液压故障分析方法、故障树分析方法在舵机液压系统应用。 相似文献
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针对液压系统中元件复杂、故障隐蔽性强而造成的诊断难题,提出了基于模型的故障诊断方法,为验证方法的可行性,进一步提出了故障诊断的仿真验证方法,搭建了其仿真模型。以某型随车起重机变幅液压系统的工作原理为基础,分析了变幅液压系统常见故障及故障注入方法,选取换向阀阀芯卡死故障进行诊断,通过阀芯液阻控制模块注入阀芯卡死故障,建立其功率键合图模型;其次,利用扩展遍历路径法生成一组解析冗余关系(ARR)的公式,并推导出阈值计算公式,采用MATLAB/Simulink平台搭建的故障诊断仿真模型计算出系统残差;最终,根据残差估计结果,对带有换向阀卡死故障的变幅液压系统进行诊断。通过诊断结果与初始故障注入对比,以及对随车起重机实验台的故障实验结果分析,验证了基于模型的液压系统故障诊断方法的可行性和高效性,为工程机械液压系统的故障诊断提供了新思路,并为预测液压系统剩余寿命奠定基础。 相似文献
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基于故障树分析的液压系统故障诊断研究。 总被引:1,自引:0,他引:1
介绍了故障树分析方法。以叉车液压系统为例通过分析系统故障形式、液压系统结构以及组件与系统之间的逻辑关系,绘制了系统的故障树,依据故障树进行故障排查和诊断。该方法简便、直观、实用,用于液压系统故障诊断取得令人满意的效果。 相似文献
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《Measurement》2014
The leakage is a common fault in the hydraulic system of the large forging hydraulic press. The large forging hydraulic press is usually used in the high temperature situations. Hence once leakage happens, the fire hazard can be caused and the huge economic losses can be taken place. Therefore, detecting and positioning leakage is also of great importance for the fault diagnosis of hydraulic system. A new method of fault diagnosis is proposed based on extracting leakage information in this paper. Firstly, the double inverse limit space is established. Secondly, the leakage information will be mapped into the double inverse limit space via the homeomorphism mapping. The leakage is detected with equicontinuity. The leakage positioning can be realized according to the topological transitivity in the double inverse limit space. Finally, the method of fault diagnosis is feasible according to the simulation results. Hence the fault diagnosis of hydraulic system in large forging hydraulic press is realized by adopting the method proposed in this paper. The leakage can be forecasted in real-time. 相似文献
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兆瓦级风力机的液压系统一旦发生故障,维修难度较大。了解大功率风力机的常见故障及其原因,具有十分重要的意义。重视小故障、故障早期阶段的发现和排除,故障诊断和排除时注意对预兆、运行记录的分析。介绍了一种典型的1MW风力机型号的液压系统维护常见故障实例,并提出其液压系统结构的改进方案。 相似文献
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Zhen Zhao Mingxing Jia Fuli Wang Shu Wang 《Mechanical Systems and Signal Processing》2009,23(5):1573-1585
To ensure the safety, continuity of production, make a reasonable maintenance plan, save the cost of maintenance for hydraulic tube tester, it is needed to quickly identify an assignable cause of a fault. This paper is concerned with early fault diagnosis of hydraulic pump which are the heart of hydraulic tube tester. Considering that the signal of the hydraulic pump early fault is a periodic weak signal, an intermittent chaos, sliding window symbol sequence statistics-based method is proposed to detect the early fault of one single piston loose shoes of hydraulic pump on a hydraulic tube tester. The approach presented is based on the insight that the phase transition of chaos oscillator, for example, the Duffing oscillator, is very sensitive to a periodic weak signal having little angular frequency difference with the referential signal of the oscillator. While observing the intermittent chaos phenomenon through figure is not easy for computer, a sliding window symbol sequence statistics is developed to realize real-time computer observation of this phenomenon. Rather more, this paper takes a trick to decreasing the computational complexity of the sliding window symbol sequence statistics method, also analyzes the influences of different window size, depths of the symbol tree on the information entropy. At last, a control limit is introduced to realize automatic early fault alarm. The resultant approach is experimented with data simulated from an AMESim model of hydraulic tube tester. The results indicate that the proposed approach is capable of detecting the signal of hydraulic pump early fault on hydraulic tube tester. 相似文献