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升降、回转式电机机座底脚孔钻孔模
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作者 殷林杰 《中小型电机》 1999年第4期51-51,共1页
1.前言 电机机座底脚孔安装尺寸是一组重要尺寸,在制造过程中应严加控制。对于批量比较大的某一型号的产品,通常设计成多轴钻夹具一次钻成;而对于批量不大的产品一般都是在钻模上分别钻4个孔。小机座电机由于机座及钻模重量比较轻,操作... 1.前言 电机机座底脚孔安装尺寸是一组重要尺寸,在制造过程中应严加控制。对于批量比较大的某一型号的产品,通常设计成多轴钻夹具一次钻成;而对于批量不大的产品一般都是在钻模上分别钻4个孔。小机座电机由于机座及钻模重量比较轻,操作时,可在台钻平板上整体移动机座和钻模;而大机座电机由于机座及钻模比较重,移动时非常吃力。我厂曾一度在摇壁钻上钻孔,不太经济。后来设计制作了升降、回转式电机机座底脚孔钻孔模,在一般小台钻上钻孔。实践证明,效果良好。 2.钻模结构 如图1所示,以Y160电机机座为例。由于Y160电机机座有M及L两种规格,故钻模板设计成6个孔,其B值分别是B<sub>1</sub>、B<sub>2</sub>。为装夹方便,定位盘设计成削边状,通过螺钉及定位销固定在“T”型板上,可在弯板的方框中上下微小运动。轴套的中心位于4个钻套的中心连线上。 展开更多
关键词 机座 钻孔模 底脚孔 电机 升降解 回转式
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Effect of Increasing Course of Temperature and Pressure on Polypropylene Degradation in Supercritical Water 被引量:2
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作者 苏磊 吴学华 +3 位作者 刘秀茹 陈丽英 陈克宇 洪时明 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2007年第5期738-741,共4页
The effect of increasing course of temperature and pressure on polypropylene (PP) degradation in supercritical water was investigated for developing a process of recycling waste plastic. A group of experiments was c... The effect of increasing course of temperature and pressure on polypropylene (PP) degradation in supercritical water was investigated for developing a process of recycling waste plastic. A group of experiments was carded out in a reaction system at a pressure of 26MPa, temperature of 380℃ or 400℃ for 30min, 70min, and 120min by Course One (the increasing course of temperature and pressure is via gaseous regions to supercritical regions), and the other group was carried out at corresponding holding conditions by Course Two (the increasing course of temperature and pressure is via liquid regions to supercritical regions). The time of the increasing courses was about 30min. Products were analyzed by Ostward-type viscometer, gaseous chromatography, and mass spectrometers (GC/MS). Characterization results suggested that different increasing courses of temperature and pressure would give rise to different results, although they were treated under the similar holding conditions. It was also found that Course Two was more effective on PP degradation in supercritical water. 展开更多
关键词 increasing course polypropylene degradation supercritical water
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Effect of Microwave Athermal and Thermal Radiation in Wastewater Sludge Properties
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作者 N.M. Coelho K.J. Kennedy R.L. Droste 《Journal of Environmental Science and Engineering》 2011年第6期689-699,共11页
Samples of thickened waste activated sludge (TWAS) at two different concentrations were exposed to microwave radiation. Some of the samples were not allowed to heat up, to study the athermal effect of microwaves. Th... Samples of thickened waste activated sludge (TWAS) at two different concentrations were exposed to microwave radiation. Some of the samples were not allowed to heat up, to study the athermal effect of microwaves. The samples exposed to microwaves where their temperature was allowed to increase showed a higher degree of chemical oxygen demand (COD), protein and carbohydrate solubilization compared to a control. The size distribution of particles was changed after exposure of TWAS to microwaves. These results were also observed in the samples exposed to microwaves but kept at a constant temperature, suggesting the occurrence of a microwave athermal effect. Thermally (samples experiencing a temperature increase) and athermally (samples that were maintained at ambient temperature) microwaved subsequent anaerobic biodegradation. samples produced more methane than the non-microwaved controls in 展开更多
关键词 Athermal SOLUBILIZATION BIODEGRADABILITY MICROWAVE THERMOPHILIC WAS
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Exact Solutions of the Morse-like Potential,Step-Up and Step-Down Operators via Laplace Transform Approach 被引量:1
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作者 Altug Arda Ramazan Sever 《Communications in Theoretical Physics》 SCIE CAS CSCD 2012年第7期27-30,共4页
We intend to realize the step-up and step-down operators of the potential V (x) = V1 e 2βx+V2 e βx. It is found that these operators satisfy the commutation relations for the SU(2) group. We find the eigenfunctions ... We intend to realize the step-up and step-down operators of the potential V (x) = V1 e 2βx+V2 e βx. It is found that these operators satisfy the commutation relations for the SU(2) group. We find the eigenfunctions and the eigenvalues of the potential by using the Laplace transform approach to study the Lie algebra satisfied the ladder operators of the potential under consideration. Our results are similar to the ones obtained for the Morse potential (β→β). 展开更多
关键词 exact solution laplace transform non-central potential Schrdinger equation
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