共查询到20条相似文献,搜索用时 62 毫秒
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1.油箱供油开关漏油(1)漏油原因:开关处的石墨—石棉油封损坏。(2)防治方法:①将开关卸下,取出填料,用耐油橡胶片做2个外径比开关壳体孔大1 mm、内径比手柄螺杆大1.5 mm的圆垫,把橡胶垫夹在钢垫中间,然后一同套在手柄螺杆上,拧紧压盖装置。②用石棉石墨绳缠在2个大小钢垫中间填满,拧紧压盖装置即可。2.油箱放油龙头漏油(1)漏油原因:放油龙头内的钢球锈死或失效。(2)防治方法:更换钢球(直径为15 mm),可用内径是80 mm的轴承内的钢球代替。3.油管喇叭口漏油(1)漏油原因:油管喇叭口锥面和喇叭口座密封不好。(2)防治方法:①拧接头时… 相似文献
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1.油箱供油开关漏油。原因是开关处的石墨及石棉油封损坏。排除方法:(1)将开关卸下,取出填料,用耐油橡胶片做两个外径比开关壳体孔大1mm、内径比手柄螺杆大1.50mm的圆垫,把橡胶垫夹在钢垫中间,然后一同套在手柄螺杆上,拧紧压盖装置。(2)用石墨及石棉绳缠在两个钢垫中间并填满,拧紧压盖装置。2.油箱放油龙头漏油。原因是龙头内的钢球 相似文献
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(1)油箱供抽开关漏油。原因是开关处的石墨及石棉油封损坏。排除:①将开关卸下,取出填料,用耐油橡胶片做2个外径比开关壳体孔大1mm,内径比手柄螺杆大15mm的圆垫,把橡胶垫夹在钢垫中间,然后一同套在手柄螺杆上,拧紧压盖装置。②用石墨及石棉绳缠在2个钢垫中间并填满,拧紧压盖装置。 相似文献
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拖拉机经过一段时间的使用,由于日常维护和保养不周,往往会产生局部漏油,造成不良后果. 1.油箱供油开关漏油 故障原因:供油开关处的石棉油封损坏. 排除方法:①将开关拆下,取出损坏的油封,用耐油橡胶片做两个外径比开关壳体孔大1 mm、内径比手柄螺杆大1.50 mm的圆垫,把橡胶垫夹在钢垫中间,然后一同套在手柄螺栓杆上,拧紧压盖装置.②用石棉绳缠在两个钢垫中间并填满,拧紧压盖装置. 相似文献
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戴玲玲 《农业机械化与电气化》1999,(5)
1油箱开关处漏油将开关卸下,取出填料,用耐油橡胶片做两个外径大于开关壳体孔1mm,内径小于手柄螺杆2mm的垫圈;再做两个外径比壳体孔大1-5mm、内径比手柄螺杆大1-5mm的圆钢垫,把橡胶垫夹在钢垫中间;然后一同套在手柄螺杆上,拧紧原压紧装置即可。2空心螺钉接头漏油此处漏油多因油管接头垫圈不平而引起,但也有因壳体上螺孔处凸起而引起漏油的情况。排除时可将接头、垫圈磨平,或把螺孔凸起部分锉修平整,然后在接头和垫圈中间加一个塑料垫圈,将空心螺钉拧紧即可。3壳体接触面漏油对于不常拆卸的部位,如纸垫较小,… 相似文献
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(1)油箱开关处漏油 将开关拆下,取出填料,用耐油的橡胶皮做两个外径大于开关壳体孔约1毫米,内径小于手柄螺杆轴2毫米的垫圈;再做两个外径比壳体孔小1.5毫米,内径比手柄螺杆大1.5毫米的圆钢垫;然后把橡胶垫夹在中间,套在手柄螺杆上, 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