水轮机

The dynamic performance equations for flexible rotor-bearing system are eshablished, the dynamic analysis for the rotor bearing system is carried out, the influence of mechanical seals to forced and self-exciting movement of rotor-bearing system is presented.

建立了柔性转子轴承系统的运动方程，对水轮机转子－轴承系统进行了动力学分析，确定了机械密封对转子－轴承系统动力学性能的影响。

Through the details simulation calculation of typical operation conditions of turbine, some conclusions are showed: the design of the overflowing parts is appropriate; the flow in the draft tube is smooth in the optimal operation conditions, the rotation direction of the vortex band is reversed to the runner in the large flow, and the rotation direction of the vortex band is identical to the runner in the small flow.

通过对水轮机典型工况点的详细计算分析，可以看出：各过流部件的设计符合设计要求；同时在最优工况下，尾水管没有明显的偏心涡带，在大流量工况下，尾水管直锥段内有与旋转方向相反的涡带；在小流量工况下，尾水管直锥段内有与旋转方向相同的涡带。

Hydraulic actiyator system is one of the important systems for operating quality and security of electrical power plant.

水轮机调速系统是影响电力系统运行质量和安全的最重要的控制系统之一。

This will be a turbo-electric system based on proven water turbine systems used in landbased arresting gear, but with a lighter synthetic cable system and an electromagnetic motor to meet the USN's performance goals.

这是一个在验证过的陆基制动装置所使用的水轮机系统基础上发展而来的涡轮发电系统，它和一套更轻型的综合电缆系统还有一台电动机一起满足美国海军的性能要求。

In order to analyze the movement of the piston-block unit quantitatively and optimize the performance of the liquid-jet hammer, the mathematical expression which relates the liquid pressure in the high-pressure chamber to other parameters was deduced on the basis of classic laws of fluid mechanics and the fluid mechanical model of an impulse water turbine.

为了定量分析活塞冲锤的运动状态，实现射流式液动锤性能的优化设计，以冲击式水轮机力学模型为参考，根据经典的流体力学基本定理，推导出了射流式液动锤高压腔内液体压力的数学表达式。

The grime that sticks on the plastic film will influence the shoot of the sun and the air temperature and the earth temperature in the plastic film. The plastic film washer is designed on the principle of the impulse water turbine. When it works, the small-amount but high-fall flow pushes forward the bladed rotors, and the bladed rotors drive the brushes to wash the film.

粘附在塑料薄膜的灰尘影响光的入射及大棚内的气温和地温，塑料大棚清洗机利用冲击式水轮机工作原理，以少水量、高落差的水流推动转轮，转轮带动刷子清洗薄膜。

Two 300 hp waterwheels drove a single-phase generator, and with a capacity of 720 kw, the power was transmitted at 4000 volts to Portland.

二台300马力的水轮机驱动一台容量为720kW的单相发电机，电力以4000V电压输送到波特兰。

The dry air goes through the re heater to warm the air that goes to the turbine to increase the turbine efficiency.

干燥的空气通过重新加热器，以热烈的空气进入涡轮，以增加水轮机的效率。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。