新型空气压缩机在焦炉机车上的应用

空气管控制管油管进气过滤器电机油过滤器油冷却器温控阀油气分离器进气阀容调阀主机单向阀泄荷阀三向电磁阀梭阀压力维持阀图1系统工作原理图1概述焦炉熄焦车长期处于高温、粉尘、烟气环境中工作,其放焦门开闭机构,走行制动机构是靠气动工作的,长期以来,机车上的空压机为1VF-2/8型活塞式空压机,这种空压机设计上采用V形90°高、低压气缸,曲轴与连杆配合精度要求高。同时,润滑油油温无温控装置,密封性差。在高温、粉尘环境中易造成曲轴与连杆抱死、烧瓦,且经常出现漏气和其他故障,维修和购买成本居高不下,很难满足生产、环保需求。针对这…     

V-2.4/9型空压机常见故障分析及处置方法

GKD2型内燃机车上装有两台V-2.4/9型空压机,为机车风源系统提供压缩空气。近年来,五台机车上的空压机故障率一直较高。因此,正确判断、及时处置空压机故障的重要性不言而喻。文章从V-2.4/9型空压机结构特点、工作原理、环境条件等方面分析了故障产生的原因,针对性地提出了相关处置方法,进一步来提高V-2.4/9型空压机的使用效率。     

东方红<5>型内燃机车风源系统改进

东方红5型机车的风源系统由空压机、总风缸、空气干燥器及电控部件组成,作用是为机车的制动机和其他的辅助用风设备提供压缩空气。通过对东方红5型内燃机车风源系统的介绍,并结合对机车近几年该系统的故障统计,找出故障根源,根据目前的检修水平,确立改造方案,通过实施取得了预期的效果,从而为下一步对老型机车实施技术改造提供了依据。     

一起机械安装引起的电机故障和处理

2001年底，新钢钒股份有限公司氧气厂在承担外部检修任务时，发生了一起因空压机接手胶圈尺寸误差而引起的电机故障。在对一台开封厂生产H400-65／0．97型空压机检修后试车时，经盘车后启动空压机电机，电机启动完成达到额定转速几秒钟后，突然发出异常声音，其电机发生剧烈振动，同时伴有白烟冒出，被迫停机检查。     

CAFH化学过滤器在ZH型离心式压缩机上的应用

分析铜冶炼生产环境中空气含有大量浓度较高的腐蚀性气体、导致ZH型多级离心压缩机主要零部件腐蚀的问题,介绍CAFH化学过滤器的主要性能、结构原理以及在空压机上的应用,可以有效除去进入空压机空气中的SO2等腐蚀性气体,保证机组的正常运行。     

浅析PLC在GK1F机车控制电路改造中的应用

应用PLC改造GK1F机车电气控制系统。主要介PLC控制系统的特点，以及在工矿机车电气控制系统中应用。     

工矿电力机车空压机常见故障与处理

文章对活塞式空气压缩机在运转过程中出现的排气量不足、有异音或振动、总风缸压力空气未达到定压时,空压机停止运转、总风缸压力空气高于调压器的调整压力,空压机仍不停止运转、总风缸压力空气低于调压器的调整压力,空压机仍不运转等常见故障作了分析,并提出相应的处理办法,以延长压缩机的使用寿命和提高其效率,保证压缩机安全运行,为生产提供保障。     

GKD2型内燃机车空气净化系统优化改进

空气净化系统是GKD2型内燃机车风源系统的主要组成部分，为机车提供清洁、高效的风源。然而内燃机车空气净化系统结构设计存在缺陷，导致机车制动系统和走车电路等相关故障频发，严重影响铁路行车安全。文章根据空气净化系统的组成和工作原理，结合实际应用情况，分析了故障产生的原因，针对性地采取了相关改进措施，降低了空气净化系统的故障率，为机车安全运行提供了可靠保障。     

DH-80透平空压机叶轮冲蚀的修复

ＤＨ—８０透平空压机是为我厂万立空分配备的压缩机,其空气流量为５９０００ｍ３／ｈ,低速轴转速为７６８５ｒ／ｍｉｎ,高速轴转速为９４２０ｒ／ｍｉｎ,排气压力为０．５５ＭＰａ（表）。但该机组运行不久就发现三级轴瓦振动较高,以后又逐渐增高,最后振动超过１００ｕｍ,被迫停机检修。１空压机振动高的原因１９９３年停机拆检后,发现空压机三级叶轮入口已发生严重冲蚀,且叶片在入口部位均被冲蚀下去近１０ｍｍ,严重影响了转子的动平衡,造成空压机叶轮振动升高。为找到空压机叶轮叶片被冲蚀的原因,我们检查了空压机冷却器,发…     

避免空压机喘振的有效措施

进乞过滤芯变脏，进气管太细或太长，级间温度太高，排气压力设定值高于设计值，节流极限（TL）设定太低，空气机的空气流道变脏，以及叶轮磨损或损坏等，都是引起空压机喘振的原因。针对这些原因，提出排除空压机喘振的有效措施在于合理的设计安装和在运行时积极做好日常的维护工作。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)