共查询到20条相似文献,搜索用时 125 毫秒
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针对天铁动力6#高炉煤气余压发电机组(6#TRT)静叶伺服控制系统静叶不同步,造成机组连接板断裂事故,分析了其发生原因,通过改造液压系统和自控伺服系统,设定相关参数,消除了由于静叶不同步而引起的设备故障现象,提高了机组运行周期,提升了发电效率,取得了较好的经济效益。 相似文献
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济钢球团厂齿辊卸料器存在着齿辊寿命短、鼓风机效率低、动静块密封不可靠且维修量大、液压系统故障多等缺陷,结合工艺要求对齿辊卸料器进行改进,将齿辊传动方式由摆式改为旋转式,增大动、静辊之间的排料间隙,将动静密封改为填料密封,并改造液压系统、水系统,从而提高了设备作业率,减少了设备维护,年增效益40.51 万元。 相似文献
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液压支架是广泛应用于现代化矿山采煤的关键设备.缸口位置静密封漏液泄漏是目前液压支架立柱普遍存在的现象,主要是液体在液压元件和管路中流动时产生压力差及各元件存在间隙等引起泄漏.通过分析间隙要求,发现螺纹颤纹在移动程度上造成立柱装配过程中因瓦心度、圆度不足,导致导向套装配过程中因晃动或蹩卡,导致静密封在装配中出现划伤、挤伤... 相似文献
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王书增 《冶金设备管理与维修》2012,(6):48-49
液压设备如果维护不当会出现各种各样的故障,严重影响设备的正常工作,应当十分重视液压设备的维护工作。该文主要介绍了液压设备冷却水系统的问题。 相似文献
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为提高液压设备的使用寿命,冶金企业开展了一系列液压设备维护技术的实践,包括设计完善的液压设备维护记录和电子台账、提高液压设备油液清洁度、监测设备的运行环境和状态以及灵活采用现场维修和液压机外总成维修结合的方式对设备进行维修,从而在提高工作效率的同时降低维修资金投入,进而为冶金企业液压设备的稳定运行提供保障。 相似文献
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液压冲击影响液压系统工作的稳定,还会给设备带来危害.介绍了部分液压元件可减少液压冲击.通过两个冶金设备的实例,阐述了液压冲击产生的原因,并提出了减少液压冲击的措施. 相似文献
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林德叉车静压传动故障分析及排除 总被引:1,自引:0,他引:1
介绍了江铜贵冶厂内重要的物料运输设备,林德8T叉车静压传动装置的构造、工作原理、静压传动可能出现的常见故障,包括液压油散热器损坏、补油泵损坏或内部磨损过大、行驶控制器总成内部相关部件损坏或堵塞、变量泵配流盘严重磨损、变量马达液压伺服先导控制元件损坏等。并逐步分析其原因、进行故障检测及排除。 相似文献
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Recommendations are given for the use of sealing devices for plungers in high-pressure equipment for powder hydrostatic compaction. A new seal structure is suggested. 相似文献
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Kurt Jacobus Huseyin Sehitoglu Mark Balzer 《Metallurgical and Materials Transactions A》1996,27(10):3066-3073
The effect of stress state on the character and extent of the stress-induced martensitic transformation in polycrystalline
Ni-Ti shape memory alloy has been investigated. Utilizing unique experimental equipment, uniaxial and triaxial stress states
have been imposed on Ni-Ti specimens and the pseudoelastic transformation strains have been monitored. Comparisons between
tests of differing stress states have been performed using effective stress and effective strain quantities; a strain offset
method has been utilized to determine the effective stress required for transformation under a given stress state. Results
of the tests under different stress states indicate that (1) despite the negative volumetric strain associated with the austenite-to-martensite
transformation in Ni-Ti, effective stress for the onset of transformation decreases with increasing hydrostatic stress; (2)
effective stressvs effective strain behavior differs greatly under different applied stress states; and (3) austenite in Ni-Ti is fully stable
under large values of compressive hydrostatic stress. 相似文献
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利用PLC软件、画面组态软件及无线传输技术实现了天车远程监控,并对监控系统的功能进行了拓展,提高了天车的电气设备管理水平,确保了设备的安全运行. 相似文献
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M. B. Winnicka ph.d.Candidate Z. Witczak R. A. Varin 《Metallurgical and Materials Transactions A》1994,25(8):1703-1711
A Mn-modified Ll2 Al3Ti-base intermetallic was subjected to compressive deformation at room temperature under superimposed hydrostatic pressures
up to 1000 MPa. It is found that its yield strength is essentially unaffected by hydrostatic pressure. The apparent work-hardening
rate of true stress-strain curves increases substantially with increasing hydrostatic pressure. Vickers microhardness of pressurized
samples always increases with increasing compressive strain, indicating the work-hardening behavior, but it is independent
of the superimposed hydrostatic pressure up to 1000 MPa. The density of microcracks (cm/cm2) observed in specimens compressed under hydrostatic pressure increases with increasing compressive strain for each level
of pressure. At each constant compressive strain, the corresponding density of microcracks is higher for specimens tested
under 170 MPa hydrostatic pressure than that for specimens tested in the 400 to 1000 MPa hydrostatic pressure range. This
may imply that besides propagation, the nucleation stage may also be suppressed by a superimposed hydrostatic pressure. It
is proposed that both the cataclastic (characteristic for deformation of some rocks) and plastic deformation occur simultaneously
during compressive deformation of Ti trialuminides under hydrostatic pressure. 相似文献