共查询到20条相似文献,搜索用时 195 毫秒
1.
2.
3.
4.
采煤机油液的在线监测可检测其传动系统运行状态,成为采煤机状态监测的一个新的研究方向。首次根据工业闭式齿轮油换油标准划分润滑油污染阶段,并对采煤机油液中的磨损颗粒形态进行研究。研究表明:可将采煤机传动系统润滑油的使用寿命划分为6个阶段:未使用期,轻度污染期,次轻度污染期,次重度污染期,重度污染期,报废期。对未经使用的采煤机油液中颗粒形态进行了研究,发现即使未使用的润滑油中也存在颗粒,颗粒粒度在5 μm以下,将对润滑油评判标准产生影响。指出在进行采煤机传动系统油液磨屑监测参数设定时,要注意几个磨屑粒径节点:30,50和70 μm;当油液中磨屑粒度小于30 μm时,采煤机处于正常运转阶段;当油液中磨屑粒度大部分位于30~50 μm时,采煤机处于正常运转阶段,但需注意补充一定量新润滑油;当油液中出现50~70 μm的磨屑时,可考虑进行润滑油的更换和传动系统检修;当油液中出现大于70 μm的磨屑时,可开展传动系统大修。 相似文献
5.
6.
7.
8.
液压油在线污染度连续监测传感器研究 总被引:2,自引:0,他引:2
在液压油在线污染连续检测过程中,流速随机波动和颗粒分布随机变化等复杂环境影响液压油污染度测试精度。采用FARIMA数学模型和随机过程谱分析方法对复杂环境流速信息进行实时识别与补偿,设计一种新型颗粒污染传感器。测试结果表明,新型传感器在复杂应用环境下得到了重复性精度更高的污染度测试结果。该传感器已成功用于液压装置液压油污染状态的实时监控。 相似文献
9.
为了同时实现对润滑油多信息的状态监测,开发了基于石英晶体微天平(QCM)的能同时监测润滑油黏度和磨损颗粒的复合传感器,并进行了传感器不同油温条件下的稳定性等系列实验。实验结果表明:该型传感器对润滑油黏度和磨损颗粒量的变化具有较高的线性响应和灵敏度,能准确测量润滑油黏度及磨损颗粒含量,且稳定可靠。 相似文献
10.
11.
12.
铜拉丝润滑关键技术研究 总被引:2,自引:0,他引:2
铜拉丝润滑液研究开发的关键是如何解决铜拉丝生产中的缩丝和断丝的问题。以蒸馏妥尔油和二乙醇胺为主要原料,合成妥尔油酸二乙醇酰胺表面活性剂,其具有良好的乳化、润滑、防锈和抗硬水及铜皂分散性能,应用在高速铜拉丝润滑液中,避免铜皂堵塞拉丝模的现象,解决了铜拉丝过程中的缩丝与断丝问题。 相似文献
13.
高宝元 《仪器仪表标准化与计量》2014,(5):39-42
雷达非接触式储油大罐自动量油装置由雷达探测器和雷达智能显示仪两部分组成.具有测量精度高、免维护、非接触实时监测液面。对于测量腐蚀性介质更具有很大的优势等特点。替代人工上罐量油,能减轻员工的劳动强度,确保员工的人身安全。不但可以监测储油大罐内原油液高、空高、压力、体积、重量、密度、温度等技术参数外.还可以查询历史报表数据.实时报表打印及网络通讯等功能。该装置进行了现场应用研究,现已完成3个储油大罐的现场试验验证。 相似文献
14.
随着物联网技术的飞速发展,为保证水资源的合理利用和有效监测管网中的水资源流失情况,亟需提供一种能够实时监测居民用水的物联网水表装置。通过采用物联网水流量装置,有效解决现有水表安装在户外或者地下室中人为抄读数据不方便,以及人为抄读数据容易出错的问题。工作人员通过查看抄读回的用户使用数据信息,对用户的使用情况进行检测和控制。实验表明,此智能水表装置可以达到传输数据的目的,为后续的漏损分析提供了重要的依据。 相似文献
15.
Y. C. Yu S. L. Yang Y. Yin C. M. Wang X. Y. Hu X. X. Meng S. F. Yu 《Journal of Mechanical Science and Technology》2013,27(7):2125-2131
A 17 mm low-carbon steel plate is welded by a fiber laser with a narrow gap joint configuration and multi-pass technique. A high-speed camera is used to real-time monitor the welding process, and the effects of groove size and the side shielding gas on the weld quality are studied. Experimental results showed that a concave shape in the bottom of weld can be formed when use a general shielding gas nozzle with the 8.0 mm external diameter. Through a special design of the shielding gas nozzle with the 2.0 mm external diameter which can deep into the interior of groove, the pressure from shielding gas can balance the surface tension from the liquid in the top of groove, so the shielding effect can be dramatically improved and the concave shape in the bottom of weld can be eliminated. When the filler wire and laser beam can smoothly enter the groove, using a relatively small groove size not only reduce the consumption of filler wire but also reduce the deflection of filler wire in the gap that can improve the fusion of groove. 相似文献
16.
17.
Ren-cai Zhang Xiang Yu Yun-long Hu Hong-jiao Zang Wen Shu 《The International Journal of Advanced Manufacturing Technology》2018,96(5-8):1693-1704
The hydraulic system is the control center of aircraft, the performance of which is critically dependent on the purity of the oil that flows through it. Contamination of hydraulic system oil has been known to be the primary cause of catastrophic failure and accidents. A review of literature in the area of hydraulic oil contamination reveals three facts: (i) there is a dearth of effective methods to prevent intrusion of external contaminants into the hydraulic oil, (ii) there are no effective purification methods for liquid and gaseous contaminants of oil, and (iii) there is an absence of real-time monitoring for major contaminants. This work systematically reviews the hazards, sources, and removal methods of major contaminants, especially of gaseous contaminants. An active method to control oil contamination is proposed instead of the existing passive maintenance techniques that are ridden with problems. In a case study of aviation hydraulic system, our active control system comprises (i) a closed hydraulic circuit and a closed oil tank to prevent the intrusion of external contaminants, (ii) a vacuum centrifuge to efficiently remove contaminants without creating consumption costs, and (iii) monitoring devices installed to actively monitor the contaminant content in oil during operation. The results from the purification experiments and three-dimensional modeling indicate that the active control of hydraulic oil contamination can effectively remove 98.4% solid contaminants and reduce the water content below 50 ppm, and in particular reduce the gas content below 2%. It is obvious that this method can improve the continuous operation capability of aviation hydraulic systems and extend the intermaintenance period of aircrafts by reducing the contaminant content in oil. 相似文献
18.
高速机械系统运动特性的实时视觉检测技术研究 总被引:3,自引:0,他引:3
介绍一种利用高速视觉传感器,对机械系统高速运动进行实时运动特性提取的技术,并搭建高速视觉检测系统,可以对复杂的高速机械设备进行长时间、无接触的运动频率检测。本技术将高速相机视为多传感器系统,对预存储的多周期高帧率图像进行离线处理,设计周期运动特性关键像素点提取算法,以这些像素点为固定的多个子传感器,将图像简化为一维向量,并建立周期运动特性样本序列数据库,实现基于视觉平台的高速机械运动相位和频率检测技术。为验证算法的有效性和系统的稳定性,利用步进电动机带动的旋转装置和缝纫机的机械运动部分进行试验,结果证明了本算法和系统可以正确的提取周期运动特性关键像素点,建立样本数据库,完成高速实时视觉检测。 相似文献
19.
基于滤膜淤积法的油液污染在线监测系统 总被引:3,自引:0,他引:3
针对油液污染是导致液压系统故障的主要原因以及目前国内外油液污染大多不能实现在线监测的现状,提出基于滤膜淤积法的恒功率测量法,在保证功率恒定的情况下测量通过某一固定体积时的压差来间接测量油液的污染度。采用阀用直流电磁铁作为主推动力元件来推动特制液压缸内活塞杆来获得压降,自制金属滤膜作为传感元件,并设计了监控软件操作平台,完成了油液污染在线监测系统的设计、调试和试验工作。试验结果表明,该系统能给出相应的ISO、NAS及SAE油液污染等级,并有良好的人机交互能力。与离线测试装置相比,具有可信的精确度和实时性,可满足生产现场的使用要求,具有一定的推广应用价值。 相似文献
20.
Accurate monitoring of a multiphase fluid flow in a dynamic pipeline is a significant problem in the oil industry. For efficient management of oil field wells, a real-time online system with capabilities to monitor fractions of oil, gas and water in oil production pipelines is required. These parameters determine the oil quality and inform how much water, oil and gas is produced from oil wells. This paper reports on the development of a novel non-intrusive sensor, which is based on electromagnetic waves cavity resonator. It determines and monitors the percentage volumes of each of the two phases (oil and gas) in the pipeline using the resonant frequencies shifts that occur within the resonator. A laboratory prototype version of the sensor system was constructed and tested. Experimental results were in good correlation with theoretical model that was simulated with High Frequency Structure Simulation (HFSS) software. Reported system will form the basis for the advanced real-time multiphase fluid composition monitoring platform. 相似文献