Suitable for producing double twist spring , straight spring , pagoda - shaped draught spring , rectangular spring , wires with various shapes , volute spring and other special - shaped springs 五、适用于生产双扭簧、直形簧、宝塔拉簧、矩形簧、线材成形、钢皮涡簧及各种花式簧、异形簧等。
Sow series single stage double entry pump is a horizontally split volute centrifugal pump , mainly used to handle clean water or liquids similar to water in physical and chemical properties , temperature not above 105 Sow系列单级双吸泵系水平中开蜗壳式离心泵，主要供输送温度不高于105的清水或理化性质类似于水的液体。
Then a specific ventilator was chosen as an example , and by the method of objective functions , the diffusion angle of its volute was calculated and analysed to optimize the operating performance of the ventilator 并针对有具体用途（使通风机的流量达到额定值）的通风机，采用目标函数法对通风机综合性能指标最优化的扩压角进行了算例分析。
The base discharge elbow shall meet the slide bracket by method of a three point , wedged engagement that is uniquely designed to match the volute flange to the stationary elbow to eliminate head losses 排泄弯头基座应该与滑动平台相匹配，所采用的连接方式应该为三点楔入接合式，并专为蜗形法兰与固定弯头特别设计，能够达到消除扬程损失的目的。
By the multiple objective optimization , the diffusion angle of the ventilator volutes with high efficiency , low noise and high total pressure of the ventilators was calculated and selected according to the experimental data 摘要根据实验数据，采用多目标最优化的方法，对效率高、噪声小、全压大等性能指标皆好的通风机蜗壳扩压角进行了理论计算选择。
Although the structure of the pump is different from the normal one , the performance of the pump can be measured and the internal flow fields in the volute and impellers can be investigated by using piv easily 这样，该实验装置既能进行水泵性能试验，又满足piv的测试要求。本文在转速为1200r / min工况下，进行了水泵的外特性试验，得到了水泵的性能曲线。
The velocity - coefficient method was used to design a 180mm diameter impeller with five single - arc - cylinder blades . the exit angle and inlet angle of the segment are 35 . 1 and 36 . 0 in degrees respectively . the shape volute ' s cross - section is the rectangle 该叶轮采用速度系数法设计，转轮外径180mm ，共有5张单圆弧圆柱形叶片，其出口安放角、进口安放角分别为35 . 1度、 36 . 0度。
It requires more even airflow and avoids the tremble of the compressor and the instability of gas turbine . at the same time , the dimension of the inlet volute must be as small as possible , so that the gas turbine can work well 一方面，它要求流经进气蜗壳的气流尽量均匀，以免造成压气机的喘振和整个动力装置性能的不稳定；另一方面，要求进气蜗壳结构尺寸在保证要求的前提下尽量小，有利于机舱的布置。
In the first part , the method of velocity coefficient was used to design a 100mm diameter impeller with five single - arc - cylinder blades , and the method of velocity moment was applied to design the volute " s cross - section . the volute " s cross - section is a rectangle , which was designed as a whole structure with the front shroud of the pump . a special lighting window was designed on the side 在第一部分工作中，设计了一个带半开式叶轮的微型泵：叶轮外径100mm 、共5片单圆弧圆柱形叶片；蜗壳采用速度矩法设计，内为矩形断面，和泵壳前盖板为一整体、透明结构，侧面专门设计一个打光窗口。
It uses the encouragement of step wave or other impulse current field source to produce the transition process field in earth . in the moment of shutting the power it produce the volute alternating electromagnetic field . from the abnormity of measuring the attenuation character of the second induction electromagnetic field , which produced by underground medium with time change , the conductive capacity and the position of the underground non - homogeneous substance can be analyzed 瞬变电磁法( transientelectromagneticmethod )是一种时间域的电磁勘探方法，利用阶跃波或其它脉冲电流场源激励，在大地产生过渡过程场，断电瞬间在大地中形成涡旋交变电磁场，测量这种由地下介质产生的二次感应电磁场随时间变化的衰减特性，从测量得到的异常分析出地下不均匀体的导电性能和位置，从而达到解决地质问题的目的。
