? Factory Tests and Controls
? 工厂测试和控制
1. Tests on reduced scale (0.6 to 0.7) models shall be carried out for the feedwater pump hydraulic (suction part, impeller, diffuser and/or volute) of the feedwater pump.
1. 对比例缩小的（0.6-0.7）型号进行的测试应针对给水泵水力部件（吸入部件、叶轮、扩散器和/或蜗壳）实施。
These tests shall be carried out at reduced speed, with visualization of flow at the impeller inlet.
这些测试应以降低的速度借助叶轮入口处的流量直观显示实施。
Their aim shall be:
这些测试的目的是：
- to optimize hydraulics with regard to the stability of the characteristic head flow curve associated with maximum efficiency,
- 从与最高效率有关的压力流量特性曲线的稳定性方面优化水力部件
- to optimise the impeller inlet with regard to cavitation phenomena,
- 对叶轮入口进行气穴现象方面的优化设计
- to reduce pressure fluctuations,
- 降低压力波动
- to reduce noise level at its source,
- 降低来源处的噪声级
- to establish with precision impeller vibration modes.
- 建立精确的叶轮振动模式
Beijing Chinese Subtitling Translation Service Agency has translated many technical documents about Factory Tests and Controls.
华译网上海翻译公司曾经翻译过大量有关工厂测试和控制的资料文件。
2. The first pump shall undergo a complete set of measurements including, among others:
2. 第一台泵应进行一整套的测量，包括
- statement for blade profiles,
- 叶片剖面的描述
- a control for blade pitch,
- 叶片间距的控制
- flasks and water inlet width control.
- 长颈瓶和水入口宽度控制
For these controls, drawings specifying design dimensions shall also specify tolerances.
对于这些控制，标明设计尺寸的图纸还应标明公差。
3. Hydraulic behavior with regard to cavitation and characteristics (H and efficiency - f(Q)) shall be checked on the first typical hydraulic (impeller and diffuser) or volute. This checking shall be carried out at reduced speed, and with the aid of a special casing allowing visualisation of flow at impeller inlets.
3. 应在第一台典型泵过流部件或蜗壳上检查有关气穴和特征曲线（H和效率-f（Q））的水力特性。该检查应在减速下借助专用外壳（能够直观显示叶轮入口处的流量）实施。
4. Manufacture of the first series of hydraulics shall only be commenced in the case of satisfactory results of tests defined above. This specification shall allow no subsequent trimming on hydraulic parts of individual pumps.
4. 第一批泵的制造只能在上述测试得到满意结果后才能够开始。该规格说明应不允许对每台泵的过流部件进行后续的调整。
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