共查询到20条相似文献,搜索用时 578 毫秒
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《机电工程》2021,38(4)
针对教学与科研实验开放性、扩展性的需求问题,设计、开发了变转速液压测控实验台。设计了实验台的硬件部分、电气控制部分及测控系统结构部分;采用了以工控机和LabVIEW软件的测控平台,开发了不同的程序,以对液压马达转速、系统流量与压力等物理量进行测量和控制;以设计的液压马达转速闭环PID控制实验为例,分析了该控制方式的原理,并进行了液压马达转速阶跃变化、负载恒定工况条件下的验证实验。研究结果表明:当液压马达目标转速阶跃变化、负载恒定情况下,采用该控制方式时的实际值能很好地响应目标值的变化,并动态地维持在目标值附近;该实验台具备良好的开放性、扩展性,能满足教学与科研的需求。 相似文献
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基于VB的液压实验数据采集及处理系统 总被引:1,自引:0,他引:1
设计了一种基于VB6.0的液压实验台计算机测控系统.此系统建立了测试数据库,实现了液压传动试验的数据采集及处理、液压实验的特性曲线绘制等功能,并通过主机与PLC的通讯实现系统的控制功能.操作简便,功能强大,可完全满足液压传动实验的测试要求.并介绍了基于插值原理的实验数据处理方法,以液压马达性能测试实验为例,验证了液压传动实验中数据处理系统的功能. 相似文献
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针对液压马达综合性能测试,研制了一种液压马达综合测试试验台。对试验台数据测试和数据采集系统进行了集成设计,对试验台的组成、技术要求、工作原理,以及功能和控制系统进行了设计研究。该试验台综合了液压马达、液压阀和液压缸专用试验台的设计思路,能够实现同一试验完成多项测试的目的,具有很好的推广价值。 相似文献
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多功能液压元件综合实验台的设计 总被引:1,自引:0,他引:1
为满足多品种液压件性能测试要求,设计了多功能液压元件综合实验台.文中介绍了实验台结构、工作原理、测试性能,设计结果合理,测试效果良好. 相似文献
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针对批量液压马达试验中能量浪费的问题,提出了精确控制马达转速和马达加载的试验方法,设计了一种电功率回收液压马达出厂试验台,并对液压马达试验台电功率回收原理及功率回收效率进行分析。采用AMESim软件对系统功率回收效率仿真,且通过试验台对液压马达相关性能进行测试,对试验与仿真系统功率回收效率进行比较分析,发现在仿真和试验中系统功率回收效率存在最大值且与液压马达总效率正相关。试验台设计合理,可以较好的实现试验过程中多余能量回收,对液压马达试验台电功率回收的设计与研究具有参考价值和实际工程指导意义。 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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Meghan K. Miller Hassan Khalid Paul W. Michael Jeffrey M. Guevremont Kenneth J. Garelick Grant W. Pollard 《摩擦学汇刊》2013,56(4):622-630
Hydraulic motor efficiency does not depend upon viscosity alone. Under low-speed, high-torque conditions, hydraulic motors operate in the boundary regime and, therefore, surface interactions of lubricant additives can affect friction and efficiency. This article presents an investigation of boundary film formation, friction, and surface topography in benchtop tribometers and hydraulic motors. Fluids investigated included those with varied antiwear packages (zinc dialkyldithiophosphate [ZDDP], ashless) and friction modifiers (with and without) and base oil (Group I, Group III). The mechanical efficiencies of geroler, axial piston, bent-axis, and radial piston motors were measured under low-speed, high-torque conditions. The addition of a friction modifier to an ashless hydraulic fluid increased the efficiency of the motors at low speed. Energy-dispersive X-ray spectroscopy (EDX) analysis of motor surfaces after testing revealed the presence of tribochemical films from the hydraulic fluid additives. In benchtop tribometer testing, the friction modifier reduced friction significantly but also increased wear. This could be related to surface competition of the friction modifier and antiwear chemistries, as evidenced by the reduced concentration of phosphorus on the surface. These findings are significant because they provide insights toward the development of fluids that can enhance motor efficiency but also demonstrates the need for a well-balanced additive package so that improved motor efficiency can be achieved without affecting other important properties of the fluid. 相似文献
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针对现有锚杆钻车生产过程中存在的一些弊端,提出了锚杆钻车钻架阀组试验台的设计方案,设计了液压系统与试验台控制系统,并论述了系统的配置与工作原理。该系统将计算机控制、检测技术、计算机网络技术与液压控制系统有效地结合起来,可对液压系统各参量进行实时控制,对加载压力、阀组内部主要控制回路性能参数进行巡回跟踪检测,使阀组测试实现了自动化和智能化。 相似文献