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介绍了机车移车台的技术要求、结构特点和技术参数,对新型220 t机车移车台进行了设计。对移车台进行了有限元分析,并在枕梁中间部位增加辅助支承轮,提升移车台的强度和刚度。对移车台传动机构进行了优化,对移车台电气系统进行了计算,并应用了交流绕线式电机串电阻调速方式和地坑侧壁滑触受电方式,同时进行了多轨距设置。所设计的新型220 t机车移车台结构简洁合理,具有较好的推广性和通用性。 相似文献
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介绍了变频调速技术的优势,对变频调速技术应用过程中应注意的问题进行了分析,阐述了变频调速技术的理论基础与控制策略,并就变频调速系统的硬件组成进行了探讨。 相似文献
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主要从变频调速器的原理及特点入手,对某选煤厂循环泵变频调速的改造进行了分析,分别从变频调速原理、变频节能的可行性、变频调速改造设计、应用效果几方面展开。分析认为,变频调速器的应用,节能效果非常明显,并提高了设备和系统的安全可靠性。 相似文献
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经济进步对工业发展提出更高的要求,变频调速和自动化控制被广泛应用到实际生产中,引起工业的变革。变频调速的特点是可靠性强,节能稳定,因此受到工业领域的广泛认可,造纸机控制变频调速的广泛应用,促进了造纸生产的整体提升。基于变频调速的复杂性,本文分析了造纸机传动的自动化要求以及对变频调速的应用,以期实现自动化生产。 相似文献
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In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape. 相似文献
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通过分析膨胀套在实际使用产生滑移受阻现象、卡死现象原因的实质,并在分析产生问题原因的基础上提出了改进措施即:增加导向机构。 相似文献
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设计了磨粉机快辊轴承座的加工工艺和具体的工装夹具.利用卧式加工中心加工磨粉机快辊轴承座,辅以能够高效快速夹紧的夹具,既可以保证加工精度,又能够提高加工效率. 相似文献
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一种涡旋压缩机径向随变机构的设计 总被引:1,自引:0,他引:1
详细介绍了运用随变原理设计的一种新型径向密封机构的结构特点,工作原理及主要参数的确定方法,该机构可补偿由于涡旋体加工精度不高而造成的功率损失,适用于涡旋压缩机的批量生产。 相似文献
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本文以某些积算和双笔记录仪产品为例说明由于仪表功能设计的不合理或选型不当,影响了仪表的正常使用,制造厂和用户应关注这类问题。 相似文献
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V. P. Dragunov E. G. Kostsov 《Optoelectronics, Instrumentation and Data Processing》2009,45(3):234-242
Specific features of operation of one- and two-capacitor microelectromechanical converters (MEMC) of energy of mechanical microscopic vibrations into electric energy with a modulated electrode-gap magnitude and with allowance for the mutual influence of electrical and elastic forces are analyzed, and the characteristics of these two devices are compared. The main factors restricting the increase in MEMC power are demonstrated to be the effects of “collapsing” and the condition of conservation of positive rigidity of the system. Expressions for estimating the limiting MEMC parameters are derived. The possibility of electrical energy generation in the presence of “real“ sources of wide-spectrum microscopic vibrations is considered. 相似文献
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针对目前市场对工业设计人才的需求,本文论述了我校在工业设计教育方面的改革措施,着重介绍了我校工业设计教育在软件和硬件方面所进行的一系列的改革。 相似文献