水轮机

At present, most hydropower plants close the wicket gate by using the closing law with two or three slopes. In fact, as the unit capacity goes up and the turbine working range of water head be even wider than before, so that the fixed closing law with two or three slopes can't control the unit stability effectively when the big fluctuation transient comes op.

目前，普遍采用导叶两段或三段关闭规律，实践表明，随着水轮发电机组容量的增大和水轮机工作水头范围的增大，这种固定的两段或三段导叶关闭方式不能有效地控制机组在大波动水力过渡过程中的稳定性。

We, establishing and acting from the date of 18,12,2008, manufacturing type of goods such as Francis turbine and governor, inlet global valve of turbine, generator and excitation system from the date of 01,02,2009, having address at China, hereby to authorize to and extend complete power of attorney to the Bidder to offer the goods manufactured by us under the Bid Document of the Bidder.

We， 我门从2008年12月18日起开始制造如轮流式水轮机以及自动调节器，从2009年2月1日引进引进全球涡轮阀门，调节器以及加速系统，生产厂址位于中国××××，由此根据投标方投标文件的内容授权并扩大对投标方的委托权来提供由我们制造的产品。

Motor part of a "3 hit machine" design, the main axis short, three bearings in the turbine above all, greatly improve the efficiency and life of unit is the axial plane of the replacement Product.

电机部分采用&3型击机&的设计，主轴短，三个轴承都在水轮机上面，大大提高机组的效率和寿命，是轴流机的更新换代产品。

In particular, induction generators cannot support the system voltage during faults, unlike steam or hydro turbine-driven synchronous generators (however properly matched power factor correction capacitors along with electronic control of resonance can support induction generation without grid).

特别是，感应发电机不能支持系统电压故障期间，与蒸汽或水轮机驱动的同步发电机（但是适当匹配功率因数校正电容器以及电子控制的共振可以支持新一代无网格感应）。

Guangxi Yantan turbine diameter 8m 90s in the 20th century in operation, mainly due to the hydraulic design and manufacturing quality Runner and other reasons, put into operation a serious vibration, cracks, vibration tube into the door crack, power generation Floor Vibration machine layer. 10 years of annual repair cracks, cavitation, multiple blade line has been restored can not be guaranteed, for the more radical change in this situation, has on one desktop PC upgrades, replacement of the old wheel, replaced by a Taiwan new designs, new technology a new wheel, troubled years of generating station floor floor vibration problems are basically solved.

广西岩滩水电站直径达8m的水轮机在20世纪90年代投入运行，主要是由于水力设计和分瓣转轮制造质量等原因，投入运行后振动严重，裂纹产生，尾水管进入门振裂，发电机层楼板振动。10年来年年修补裂纹、空蚀、多次修复后叶片型线已无法保证，为较彻底的改变这种状况，已对其中一台机进行升级改造，更换了老转轮，代之以一台新设计、采用新工艺的新转轮，困扰电站多年的发电机层楼板振动问题得到基本解决。

Calculations are carried out for the governing stability-limit curves concerning four hydroelectric plants, with and without a surge tank.

本文对四个水电站的调节稳定曲线进行了计算，考虑了水轮机特性和调压井断面积的影响，以及电站的各种布置。

A non-linear mathematical model is presented herein to describe the dynamic performance of the governing system for station, and furthermore, the additional index to evaluate the governing performance of the pump-turbine is put forward, that is that the selection of the governor parameters must promote the quick attenuation of the fluctuation of the water level in the surge tank.

文中提出了描述抽水蓄能电站调节动态特性的非线性数学模型，提出了衡量水轮机调节性能质量的附加指标－调速器参数的选择应促使调压室水位波动的快速衰减。

Among the designs left by Leonardo da Vinci almost 500 years ago—with notes written backward to be read with a mirror—were the parachute,life jacket, water pump,swim fins,Well digger,paddle－wheel boat,horseless carriage ,sprocketchain, steam gun, water turbine,lens-grinding0 machine,shrapnel ,machine gun, airplane, helicopter,submarine,and mass production.

近500年前列奥纳多·达·芬奇留下的许多设计稿——即须通过镜子才能读懂的反着写的笔记，其中有降落伞、救生衣、水泵、游泳脚蹼、钻井机、明轮机、无马马车、扣齿链、蒸汽枪、水轮机、磨镜片机、子母弹、机关枪、飞机、直升飞机、潜水艇和成批生产的设计。

Among the designs left by Leonardo da Vinci almost 500 years ago—with notes written backward to be read with a mirror—were the parachute,life jacket, water pump,swim fins,Well digger,paddle－wheel boat,horseless carriage ,sprocket chain, steam gun, water turbine,lens-grinding machine,shrapnel ,machine gun, airplane, helicopter,submarine,and mass production.

近500年前列奥纳多·达·芬奇留下的许多设计稿——即须通过镜子才能读懂的反着写的笔记，其中有降落伞、救生衣、水泵、游泳脚蹼、钻井机、明轮机、无马马车、扣齿链、蒸汽枪、水轮机、磨镜片机、子母弹、机关枪、飞机、直升飞机、潜水艇和成批生产的设计。

There are more than 3000 different kinds of valves available. The products series cover hydraulic turbine input liquid control butterfly valve, soft sealing gate valve, clamp butterfly valve; flange valve, expansion butterfly valve, bi-direction metal seal ing butterfly valve, tri-eccentric metal sealing butterfly valve, eccentric semi - sphere ball valve, eccentric dual -semi - sphere ball valve, and sluice gate, hydraulic slow-closing c heck v alve , v ent valve, adjusting valve, body eccentric valve, dual eccentric butterfly valve, varied eccentric butterfly valve, Check valve with little-resistance, slow-closing, noise-eliminating , butterfly valve with mid temperature and pressure, Other types of check valves and check valve gate 、 expansion joint, and being widely used in petroleum industry, chemistry, food, medicals, light industry, paper, water and electricity, ship and boat, steel and casting, Energy and Environment industry. The main valves are ever used in heat-supplying projects of National council office.

我公司主要产品有双向三偏心金属密封伸缩蝶阀、水轮机进水液控蝶阀、软密封闸阀、三维偏心全金属密封蝶阀、自动补偿双向硬密封蝶阀、耐高温金属密封蝶阀、液控缓闭止回蝶阀、对夹式蝶阀、偏心式蝶阀、伸缩蝶阀、偏心半球阀、偏心球阀、通风阀、调节阀、双偏心蝶阀、无销蝶阀、微阻缓闭消声止回阀、旋启式止回阀、防泥沙型蝶阀、自动补水阀、阀板可移动蝶阀、偏心缓闭止回阀、多功能水力控制阀、闸门、伸缩接头和管道伸缩器等三十大系列3000多个规格，广泛用于电力、石油、化工、食品、医药、轻纺、造纸、供排水、船舶、冶炼、能源、环保等行业的腐蚀性、非腐蚀性气体、液体、半流体及固体粉末容器和管网中。

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。