提供了一种确定低噪声离心通风机蜗壳结构的方法。
A method to determine low noise fan volute structure is provided.
型潜水电泵的电机位于上部，为离心式叶轮，蜗壳结构；
The motors for QDX and QX submerged pumps are mounted on the top of pumps.
龙滩水电站机组蜗壳结构尺寸大，安装精度和焊接要求高，焊接环境差，工期要求短。
Longtan hydropower station is large in big structure size of spiral case, high in installation accuracy and welding requirement, poor in welding environment, and short in construction period.
在已建的大型电站中，充水保压蜗壳结构以其独特的结构优势和可靠性得到了广泛的应用。
The structure of preloading filling spiral case is becoming larger and more complex correspondingly, and it is widely used in large hydropower house because of its reliability.
蜗壳结构是水电站结构中的重要部分，随着水电站HD值的急剧增高，结构安全和设计优化更显突出。
With the HD value of hydropower station hightening sharply, the design optimum and structure safety seem more important.
厂房上下游边墙围岩对蜗壳层混凝土结构的水平链杆约束对结构动力特性影响较小；
The parallel chain constraint, which is imposed by the sidewall on the concrete structure of the volute layer, plays a relatively small role on the dynamic characteristics of the structure.
三峡电站厂房蜗壳外围混凝土结构由于其几何形态的奇异而成为三峡电站厂房结构中最复杂的结构之一。
The concrete structure surrounding spiral case of the Three Gorges power station's powerhouse becomes one of the most complicated structures of the powerhouse for its queer geometric figuration.
得出了渣浆泵叶轮与蜗壳内的速度分布、固相浓度分布以及漩涡结构等流场信息。
The distribution of velocity and solid particles and the information of axial vortex in the impeller and volute are discovered.
混凝土蜗壳是形状复杂的空间结构，对蜗壳进行计算分析是比较困难的。
Concrete volute chamber is a kind of spatial structure of complex shape, so calculation and analysis of concrete volute chamber is very difficult.
其特征将离心泵分解成由泵盖及整体蜗壳组合结构，并在过流部位衬里一层浇注型聚氨酯弹性体。
The centrifugal pump is one combined structure of pump cover and integral volute and has one cast polyurethane elastomer lining in the fluid passing part.
首先，对于多翼离心风机涡流噪声的降噪，主要通过优化叶轮、蜗壳的结构几何参数和在叶轮出口加装旋转扩压器等方式进行。
Firstly, the vortex noise can be reduced mainly through the optimization of the geometric parameters of the impeller and volute and installing a rotation diffuser in the outlet of the impeller.
对某车辆的风扇蜗壳排气段进行了结构优化。
EXE is developed, and design for structure optimization to fan volute exhaust segment of a certain vehicle is carried out.
在水电站压力引水钢管或钢蜗壳外表敷设软垫层材料以满足结构受力要求的工程措施称之为垫层管或垫层蜗壳。
The penstock and spiral case with elastic layer are defined as a engineering measure of having flexible layer material surrounding it to meet the needs of bearing loads in structure.
在水电站压力引水钢管或钢蜗壳外表敷设软垫层材料以满足结构受力要求的工程措施称之为垫层管或垫层蜗壳。
The penstock and spiral case with elastic layer are defined as a engineering measure of having flexible layer material surrounding it to meet the needs of bearing loads in structure.
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