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本文从节能减排、绿色制造成为衡器制造业的重心,自主创新是衡器企业的生命源泉,智能型、组合型、网络化是衡器产品的发展方向,开展OIMl国际建议研究促使衡器产品走向国际市场,加强基础理论研究是衡器技术的基础等五个方面综述了2008年中国衡器技术热点问题. 相似文献
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正2016年4月19日~22日,由江苏省计量院建设的国家自动衡器型式评价实验室(江苏)应邀参加了在四川成都举办的2016中国国际衡器展览会。江苏省计量院为参加此次衡器展进行了精心准备,通过展览展柜、视频简介、现场发放宣传资料等多种方式,展示了江苏省计量院连续累计自动衡器、动态公路车辆自动衡器、重力式自动 相似文献
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GB/T7723-2008《固定式电子衡器》国家标准自2009年9月1日实施了,其中在应用的适用性中,针对衡器承载器提出相对变形量的测试要求,如何测试?是这次研究的内容。 相似文献
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正2014年7月7日至10日,全国衡器计量技术委员会自动衡器分技术委员会工作会议在南京召开。会议总结了2013年以来分技术委员会的工作,并对《定量装车系统检定规程》、《连续累计自动衡器(皮带秤)检定规程》、《连续累计自动衡器(皮带秤)型式评价大纲》、《动态公路车辆自动衡器(第四部分:石英晶体式)检定规程》4个技术法规进行了审定,山东院主笔起草的《定量装车系统检定规程》和江苏省院主笔起草的 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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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
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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