排序方式: 共有11条查询结果,搜索用时 15 毫秒
1.
音速喷嘴式燃气表检测装置是燃气表生产厂家及计量部门检测燃气表的检定装置,检测精准科学,不仅为燃气贸易中的结算提供依据,而且国家计量行政部门注重监管,因而对它的检定具有重要意义。本文从燃气表的音速喷嘴式检定装置的其结构特点和原理入手,结合检定装置技术指标,对检测的方法及相应问题的解决方法进行探讨。 相似文献
2.
双层呢织物经、纬组合采用DTY涤丝与人棉纱并合后加不同捻度、捻向的甲、乙两种股线,织物结构为表里层基础组织均为平纹的双层接结组织,在G6100剑杆织机上制织而成。织物重量达460g/m2,兼具毛、棉、麻三重风格,市场销售较好。文章介绍了该产品的设计与生产技术关键。 相似文献
3.
4.
5.
喷射沉积过程是一个多参数共同影响的复杂过程。通过对雾化器往复扫描规律以及其它工艺参数的研究,可以对喷射沉积过程进行工艺优化。基于对沉积过程的分析,建立了雾化器往复扫描喷射沉积的数值模型。采用计算机数值模拟技术与实验结合的方法,着重研究了喷射成型过程中雾化器的扫描运动对成型的影响;实验证明,根据分析所得到的雾化器扫描曲线,可以准确预测这类成型产品的形状和尺寸。 相似文献
6.
7.
8.
9.
10.
The movement mode of the atomizer is a very important parameter during spray deposition process,which has direct influence on the size and surface texture of the billets. To resolve the problem of manufacturing large size billets,a method of spray deposition by the atomizer with off-center swing was put forward. The atomizer was driven by the alternating current servomotor to swing within 7° at varying speed. The influence of the atomizer parameters,such as translation of the atomizer,swing angle of the atomizer,substrate falling speed and spraying pressure,on the spray deposition was studied. The optimized parameters of the spray deposition process were obtained. The results show that the large size billets with uniform surface quality can be made through adjusting swing frequency and angle of the atomizer,offset distance of the atomizer and inclined angle of the substrate; the valid spray area will decrease and the dimension of top surface will reduce when pressure is less than 0.4 MPa within certain spray distance; meantime,the moving time and cooling time of the droplets are extended,which will lead to loose structure and bad densification. When the pressure,the swing angle and the eccentric offset of the atomization equal 0.5 MPa,7° and 60 mm,respectively,large size billets with fine texture and diameter of 500 mm can be produced. 相似文献