共查询到18条相似文献,搜索用时 156 毫秒
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大型离心风机由于转子重量大、转速高并且风机运行中轴承的发热量较大,为此大型离心风机的滚动轴承箱需要通冷却水对轴承箱进行降温,以确保风机轴承的安全稳定运行。通过对离心风机轴承箱结构的改进设计在风机使用现场无冷却水、环境温度高的条件下保证风机轴承的安全运行,提出了滚动轴承箱润滑、冷却改进设计的新思路、新结构,为风机使用厂家节约大量的水资源,又保护了环境。 相似文献
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介绍了Solid Works参数化设计的方法及以VB为开发环境对风机塔架参数化设计进行二次开发的流程,通过调用API函数进行设计表格操作、零件建模、组件装配,最终实现风机塔架参数化设计自动建模,提高了风机塔架设计效率。 相似文献
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据统计,目前通风系统中60%的风机运行效率低于其设计选型时的效率,导致通风系统满足不了设计要求,并常常造成风机制造商、设计院、建设单位和使用单位之间的矛盾。实际上,风机的实际运行状态不仅仅取决于风机自身的性能特性,还取决于系统阻力特性以及风机与系统匹配特性。从通风系统管路设计案例,综合分析了风机运行效率偏低和风机与系统不匹配的原因,阐述了系统效应是导致风机运行效率偏低和系统运行指标不达标的主要原因。建议在通风系统设计阶段就应考虑系统效应对系统阻力的影响,在施工阶段严格按照设计进行施工。 相似文献
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介绍了风机设计软件系统的结构、原理与功能,展示了如何依靠计算机进行风机的辅助设计。应用风机设计软件系统,可以降低风机制造成本,缩短工期,提高经济效益。 相似文献
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分析了射流风机使用中易出现噪声超标的现象,提出了一种射流风机消声器设计方法,能适用于不同类型的射流风机,并举例进行了设计验证、计算。 相似文献
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BDK63型对旋风机的改进设计与性能研究 总被引:3,自引:2,他引:1
针对 BDK6 3原对旋式轴流通风机存在的两级动叶功率不匹配、效率低的缺陷 ,用混合设计法对该型风机的叶轮进行改进设计 ,使风机的工业利用区扩大 ,性能有明显地改善 ,是对现风机改进的一种途径 相似文献
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Peng Shan 《Journal of Mechanical Science and Technology》2008,22(10):1921-1925
In the design of a low bypass ratio fan stage, this paper links the through flow inverse design problems of the fan rotor,
the core channel fan stator and the bypass channel fan stator together, as an organic whole, with the fan splitter aerodynamic
design problem. It forms thus a unified through flow inverse problem for two-channel turbomachines. While an overall quasi-radial-equilibrium
of the streamlines is iteratively achieved among five parts — the fan rotor, the core channel fan stator, the bypass channel
fan stator, the fan splitter and the position of the fan splitter, the blading processes for one fan blade, two fan vanes
and one fan splitter ring are performed. This method designs in one pass a fan stage and a splitter with a precise bypass
ratio. Its primary and key approach scheme is the introduction of a mass addition flow half way through the through flow streamline
development. This scheme can serve as a new feature which can be inserted into those existing through flow programs. When
subtracting a mass flow after adding a mass flow, alternatively, this scheme can also be used to treat the inverse design
problem of a fan/compressor rotor blade with part-span shrouds.
This paper was presented at the 9th Asian International Conference on Fluid Machinery (AICFM9), Jeju, Korea, October 16–19, 2007. 相似文献
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The technique of inverse design problem (IDP) for optimizing the three-dimensional shape of an axial-flow fan blade based
on the desired airflow rate is presented in this work. The desired volume flow rate of air can be obtained from the airflow
rate of the existing axialflow fan by multiplying it with a constant which is greater than unity. The geometry of the redesigned
fan blade is generated using numerous design variables, which enables the shape of the fan blade to be constructed completely;
thus the technique of parameter estimation for the inverse design problem can be used in this study. Results show that with
the redesigned optimal fan blade, the airflow rate of fan can be increased, thereby improving the performance of the axial-flow
fan. Finally, to verify the validity of this work, the prototypes of the original and optimal axial-flow fan blades are fabricated
and fan performance tests are conducted with these blades on the basis of the AMCA-210-99 standard. The algorithm used in
the present study can be applied to the blade design problem in any propulsion and power systems. 相似文献
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矿用轴流通风机叶片三维几何模型反求重构 总被引:1,自引:0,他引:1
通风机叶片形状是影响通风机气动性能的关键因素,为了引进和吸收先进的矿用轴流通风机叶片设计技术,采用反求技术对其三维几何模型进行反求重构.首先,根据通风机叶片设计特点规划测量路径,应用三坐标测量机(CMM)对矿用轴流通风机叶片表面曲面进行测量,提取通风机叶片表面曲面的三维点云数据.然后,在反求软件UG中,利用最小二乘拟合曲线检查法对所提取的点云数据进行异常点的剔除,运用弦高-夹角综合法进行点云数据的精简.最后,采用非均匀有理B样条(NURBS)对各截面数据点进行曲线拟合,并使用通过曲线组生成曲面的方法重构了矿用轴流通风机叶片的三维几何模型,这对矿用轴流通风机计算流体力学模拟和叶片优化设计具有重要意义. 相似文献
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针对离心通风机机翼形叶片复杂的型线造型,分析了叶片的结构形成;利用先进的三维设计软件Pro/ENGINEER对叶片进行实体建模,避免了传统的风机叶片手工设计画图效率低、误差大的缺陷,实现了风机叶片的快速、准确成型,提高设计开发的效率和精度。 相似文献
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简介了耐腐蚀用的钛材通风机的概况,重点了介绍了用钛材通同机取代普通通风机,以及钛材通风机的结构设计和制造工艺。 相似文献