共查询到19条相似文献,搜索用时 93 毫秒
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从通轴式液压泵和液压马达飞轮试验台液压回路、传感器、接口及测试方式入手,建立和分析通轴式液压泵和液压马达,飞轮试验自动控制计算机测试系统. 相似文献
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随着计算机技术的发展和普及,相关功能板卡、器件和传感器的不断丰富,CAT技术在试验设备开发领域被广泛使用。液压泵是液压系统中的动力源,其性能直接影响整个液压系统的性能。使用工业计算机为主控系统,配合数据采集卡、传感器开发了一套液压泵CAT系统。所开发的系统能够对于齿轮泵、柱塞泵和叶片泵等进行试验测试。系统稳定性好,测试数据可靠,能够准确的测试出液压泵的各项性能参数。 相似文献
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液压泵是液压系统的心脏,为了确保液压系统的安全、稳定运行,需要经常对液压泵的进行检测。对液压泵进行性能测试通常会造成大量能量损耗,为了节约能源、倡导绿色环保,我们将功率回收方案成功应用在了综合液压测试台中。 相似文献
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为实现工程机械液压系统的高效节能,对液压泵的效率和控制特性进行试验研究.基于液压试验台,测试了液压泵在不同压力、转速和排量下的效率,并进行了建模分析.之后对液压泵排量的动态与静态电比例控制特性进行了对比试验.研究结果表明液压泵的高效区分布于等值线图的右上角,即中高转速和排量范围内.液压泵排量控制特性基本不受转速影响,受负载压力影响较大,新旧液压泵的排量控制特性基本相同.研究为工程机械动力匹配奠定了基础. 相似文献
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Jürgen Reichel 《Lubrication Science》2000,6(3):293-306
The antiwear properties of hydraulic fluids are important because hydraulic pump and motor wear is costly. While international hydraulic fluid performance standards continue to be developed, e. g., the ISO/TC28/SC4 committee's draft ISO DIS 11158 ‘Specifications for mineral oil hydraulic fluids’, the normal hydraulic fluid performance specifications represent minimum requirements. Performance specifications for nonmineral oil hydraulic fluids are also being developed. Typically, both the user and the fluid manufacturer possess insufficient objective information about the antiwear properties of special fluids, e. g., environmentally acceptable hydraulic fluids (EAHF) or fire‐resistant hydraulic fluids (FRHF) for use in hydraulic equipment such as axial‐piston pumps, vane pumps or radial‐piston motors. Manufacturer's specifications must therefore be determined. The required lubrication properties can be determined by either laboratory pump tests or a field trial, often at the customer's expense. The lubrication properties of a hydraulic fluid should ideally be determined under conditions that are equivalent to field practice. This paper will discuss the use of the vane pump test and the FZG gear test to gauge ‘recommended’ hydraulic fluid performance; many non‐mineral hydraulic fluids, such as environmentally acceptable hydraulic fluids, fire‐resistant fluids or synthetic hydraulic fluids, cannot be used in axial‐piston systems based only on results obtained with these tests, and additional testing is always required. Proposals are made for testing of such fluids on a variable‐load test rig. These tests are done with axial‐piston pumps, or other similar displacement systems, and are intended to determine the industrial suitability of non‐mineral hydraulic fluids. 相似文献
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提出了1种基于证据理论多源多特征融合的故障诊断方法,构建了柱塞泵的故障特征向量,分析了单源多特征融合故障诊断,利用证据理论融合多个单源诊断结果,进行了多源故障诊断.对液压泵进行了试验.试验结果表明:多源数据较单源数据,更具有冗余互补性,能提高诊断的可靠性和准确性.该诊断方法是可行而有效的. 相似文献
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液压绞车的试验,特别是寿命试验耗能是很大的.节流加载试验不仅耗能而且引起系统发热.提出液压绞车节能型试验装置,利用能量反馈回收达到节能效果,可减少试验能量损耗.试验结果表明,可节能40%.介绍能量回收试验系统的工作原理和数学模型,并设计实际系统和传感器的安放.对加载马达排量进行自动调节,钢丝绳的拉力和速度的调节和控制作详细说明.从实际应用出发,对2个辅助泵参数选择也作了较详细说明,对实际应用有参考价值.新型节能液压绞车试验装置节能环保,有应用前途. 相似文献
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液压泵健康状态评估对工程设备的运行状态监测有极其重要的意义,现有基于振动信号分析的方法数据来源单一、可靠性低,为此,提出了一种基于多传感器信息融合和多粒度级联森林模型的液压泵健康状态评估方法。通过试验系统采集了不同工作时间下液压泵的压力、温度、流量等信号,分别提取信号的时域特征组成初步特征。使用多个分类器获取初步特征的类别概率向量,将其与随机森林模型选出来的重要特征进行拼接形成最终特征,并使用多粒度级联森林模型进行健康状态评估。试验结果表明,所提方法在仅有5%训练比例的情况下分类精确率仍可达99.5%,可以有效提高液压泵健康状态评估的准确度。 相似文献
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Lois J. Gschwender Jr. Carl E. Snyder Shashi K. Sharma Tim Jenney Angela Campo Marcie B. Roberts 《摩擦学汇刊》2013,56(1):46-52
In the military aerospace community, most hydraulic fluid pumps and components are currently being stored in rust inhibited fluids containing barium dinonylnaphthalene sulfonate (BSN). Fluids containing barium are hazardous waste after use, with expensive disposal, and have caused operational problems in aircraft hydraulic systems including helicopters and fighter aircraft. In this program, bearings and pistons were stored in jars containing both operational hydraulic fluids (MIL-PRF-83282, MIL-PRF-87257, and MIL-PRF-5606) and rust-inhibited hydraulic fluids containing BSN (MIL-PRF-46170 and MIL-PRF-6083). In addition, hydraulic pumps were filled with MIL-PRF-83282, MIL-PRF-87257, and MIL-PRF-46170. Hydraulic pumps were not filled with MIL-PRF-5606 or MIL-PRF-6083 because these hydraulic fluids are being phased out of military aerospace applications as operational and storage fluids, respectively. Jars, containing bearings and pistons, as well as hydraulic pumps, were stored for up to three years in a laboratory environment to determine if operational fluids would protect them from rusting during storage. After each year, the bearings, pistons, and pumps were inspected for corrosion. At the end of three years of storage, pumps were endurance tested using fresh operational fluid, MIL-PRF-83282. The bearings, pistons, and pumps showed no rusting for the duration of storage with either operational or storage fluids. The pumps stored with the operational fluids, MIL-PRF-83282 and MIL-PRF-87257, were in better condition than the pump stored with the rust-inhibited fluid. The operational hydraulic fluids, MIL-PRF-83282 and MIL-PRF-87257, provided excellent protection against rusting during storage. 相似文献
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采用三位一体传感器、嵌入式数据采集系统和工控机等构建了工程机械液压系统故障检测系统。介绍了该系统的功能、特点以及硬软件设计方法,并进行了实例验证。结果证明该系统能够适应工程机械液压检测系统的应用需求。 相似文献
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针对履带起重机存在的功率匹配问题,分析其产生的原因.基于发动机不同的控制方式,给出相应的液压泵的控制策略.提出了一些解决履带起重机发动机-泵功率匹配问题的新方法. 相似文献