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一、制动系统的常见故障及排除 1.制动器失灵原因及排除制动器失灵即是踩下制动器踏板时,拖拉机稍有减速, 但不能立即停车。拖拉机制动器能使行驶的拖拉机刹车。因而,当制动器失灵,拖拉机需要急刹车时,往往不能制动, 势必造成机具损坏和人身事故。 (1)摩擦片严重损坏,厚度变薄,使制动器间隙增大而影响制动效果。应适当增加制动器盖处的调整垫片,使之符合 相似文献
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1.全面检查拖拉机
拖拉机夜间行驶能见度比白天低,出车前应擦净挡风玻璃,提高视线清晰度;夜间行驶驾驶员随车应备好手电,以便应急使用,但不能利用手电照明驾驶拖拉机;要检查拖拉机上各种仪表指示是否完好,照明设备是否正常,制动器、离合器、方向盘是否安全有效,如有损坏或不正常现象,应修复完好后出车,禁止带"病"夜间行车. 相似文献
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<正>上海—50型拖拉机制动采用于摩擦片盘式制动器,现将其故障及排除方法介绍如下.一、制动力矩不足或制动器失灵表现为踩下制动器踏板后,不能将拖拉机刹住,且路面无拖印,严重时拖拉机照样行驶,制动失效.故障主要原因有: 相似文献
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<正>一、制动器出现偏刹现象1.故障现象拖拉机制动时,两侧车轮分别拖出前后和长短不同的两条印痕,拖拉机跑偏,甚至伴随机车调头。2.故障原因(1)在维修保养车辆时,没有调整好左右制动器踏板自由行程,使左右制动器踏板自由行程不一样,拖拉机在制动时两边驱动轮制动不一致,制动有快有慢。(2)两边车轮制动器摩擦机件磨损不一致,或有一侧制动器摩擦机件粘油、进水,就会导致一侧制动器制动效果不好,而另一侧制动器制动效果良好。 相似文献
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1.左右制动器应调整一致,否则拖拉机制动时,会发生偏转而造成行车事故。 2.拖拉机运输作业时,应用联锁片将左、右踏板锁住,以免发生单边制动而造成严重事故。在田间作业时,为协助拖拉机转向,可将联锁片打开。 3.不使用制动器时,驾驶员不要将脚放在制动器踏板上,以免 相似文献
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欧洲拖拉机设计历史回顾及发展趋势展望 总被引:5,自引:2,他引:3
分析了西欧拖拉机的发展概况,总结了多种拖拉机质量控制方法,分析了拖拉机的传动系、轮胎、转向及制动器、柴油机、人机工程、液压系和机具操纵等的发展,并提出了欧洲拖拉机设计的发展趋势展望. 相似文献
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上海-50型拖拉机采用的是干摩擦片盘式制动器,现将其使用中常见故障及排除方法介绍如下: 1.制动力矩不足或制动失灵 表现为踩下制动器踏板后,不能把拖拉机刹住,且路面无拖印,严重时拖拉机继续行驶,制动失效,其故障主要原因及排除方法如下: (1)摩擦片磨损严重 制动器压盘与摩擦片、摩擦片与制动器盖及制动器壳体之间都有一定的间隙,其总间隙为1~1.2毫米,且间隙大小可用制动器盖上的 相似文献
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拖拉机夜间行驶能见度比白天低,出车前应擦净挡风玻璃,提高视线清晰度;夜间行驶驾驶员随车应备好手电,以便应急使用,但不能利用手电照明驾驶拖拉机;要检查拖拉机上各种仪表指示是否完好,照明设备是否正常,制动器、离合器、方向盘是否安全有效,如有损坏或不正常现象,应修复完好后出车,禁止带“病”夜间行车。 相似文献
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拖拉机变型运输机在行驶中频繁使用制动器或经常采用急刹车,不但加剧了发动机曲轴、传动部件的损坏和轮胎的非正常磨损,而且会增加燃料消耗。在确保行车安全的前提下,正确的做法是: 一、按规定装载并保持经济车速。“多装快跑”意味超 相似文献
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《Journal of Agricultural Engineering Research》1998,69(3):249-254
A model to represent the discolouration of dried powder of carrots as a function of temperature was developed. Two types of carrots, Asian and European, containing large amount of lycopene and β-carotene, respectively, were tested. The dried powder was stored under an atmosphere with O2and at three different temperatures, 5,20 and 35°C. The surface colour of the powder was monitored during storage by a Hunter colour ratioa/b. In the proposed model, the rate of oxidation was assumed to be represented by the product of the fraction of concentration of oxidized pigment at arbitrary time and a specific rate of oxidation of pigment. The rate parameters in the proposed model were calculated by fitting the experimental data with smooth curves by trial and error at the end of the induction period but before discolouration took place. The frequency constant and activation energy, expressing the temperature dependence of the rate parameters, were expressed by the Arrhenius relation. The simulation results of a Hunter colour ratioa/bof dried powder at 25°C showed good agreement with the experimental data, suggesting that the proposed model was effective for the prediction of discolouration of dried powder of both types of carrot. The use of the induction period in the manner described may enable the shelf life of dried powder to be predicted. 相似文献
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感官检验棉花的品级,这是农村常见的一种检测手段.它的一个主要特点就是存在不确定性.这是由于检验员的品级检验水平存在一定的差异,其中有很多因素制约着检验的结果.文章对影响感官检验结果的因素进行了系统的分析. 相似文献
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The fractional outflow rate of water from the rumen, measured as the rate of disappearance of the chromium complex of ethylenediamine tetra-acetic acid, was related to a number of dietary factors. A multiple regression equation was derived which expressed fractional outflow rate as a function of the intakes of dry matter, ash, acid-detergent fibre and crude protein.The data analysed consisted of 243 observations for sheep on 59 diets, including forage, concentrate and mixed diets. The ranges covered by the data were: fractional outflow rate 0.7–3.6 day?1; dry matter intake 560–1400g/day; ash 4–30%, acid-detergent fibre 7–41%, crude protein 5–26 % of dry matter; there were no observations for sheep of less than 34 kg liveweight.The equation accounted for 56·3 % of the total variance. Between-sheep variance could not be calculated for the whole of the data but was undoubtedly substantial since, for a sixth of the data, it was known to account for 38 % of the total variance. 相似文献
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从灾害经济学的角度探讨了城镇供水优化调度的必要性和可能性,认为在缺水不可避免的情况下,对供水进行优化调度可以减小缺水带来的损失,产生较好的减灾效益,特别是可以大大减小严重干旱的灾害效应。并根据水资源的特性,提出了缺水损失的计算模式以及优化调度的原则和方法。 相似文献