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新型组合式机组充分应用了我国大型立式机组数十年来积累的丰富经验、制造技术与成熟可靠的各项科研成果 .主要是 :(1)水轮机转轮采用铸焊结构 ,叶片采用不锈钢材料 ,用全方位样板进行铲磨 ;(2 )发电机与水轮机共用一根轴 ,只设 2个导轴承 ,发电机上导采用不同心分块瓦轴承 ,水导则采用固定油楔式分块瓦轴承 ,两者均采用浸油润滑方式 ,无辅助设备 ,机组推力轴承可布置在发电机上部 ,与发电机上导轴承合并 ,也可放在下部与水导合并 ,采用聚四氟乙烯尼龙推力瓦 ,运行启动时不必顶起转子 ,故不设顶起装置 ,上导轴瓦、水导瓦与推力瓦在装配时均不用刮瓦研瓦 ,只要充满和保持油位 ,不泄漏和不进水 ,便可安全无故障运行 ;(3)导水机构在结构上与传统结构相同 ,在各运动环节均采用改性聚烯烃高级塑料无油润滑轴套或轴瓦 ;(4 )因中小水电机组水轮机的操作功不大 ,当操作功小于或等于350 0 0 J时 ,均可采用电动接力器操作 ,取消液压系统 ,蜗壳进水阀也采用电动操作 ,故整个电厂可不设油系统 ;(5)发电机采用可控硅励磁 ,取消励磁机 ,机组设电制动装置与机械制动装置 ,以保证机组正常制动停机 ,所以可不设压气系统 ;(6 )机组的自动化操作、显示、保护与调速控制综合为 1个控制系统 ,使全厂实现计算机监视和控制 ,在?
The new modular unit fully utilizes the rich experience, manufacturing technology and mature and reliable scientific achievements accumulated by the large-scale vertical units in our country over the past decades. The main results are as follows: (1) The castor structure of the turbine is made of stainless steel, With a full range of models for shoveling; (2) generators and turbines share a shaft, only two guide bearings, generators on the guide with different heart block tile bearings, water guide is fixed wedge block bearings , Both using oil-immersed lubrication, no auxiliary equipment, unit thrust bearings can be arranged in the upper generator, and the generator bearing on the merger, but also on the lower merger with the water, the use of PTFE nylon thrust shingles, It is unnecessary to lift the rotor at the start of the operation. Therefore, no lifting device, upper guide bush, water guide tile and thrust bush are not required to be scraped at the time of assembling so long as they are full and maintain the oil level, no leakage and no water Safe and fault-free operation; (3) The water guide mechanism is the same in structure as the traditional structure, and the modified polyolefin high-grade plastic oil-free shaft sleeve or the bearing bush are adopted in all the movement links; (4) Work is not large, when the work is less than or equal to 350 0 0 J, can use the electric relay operation, cancel the hydraulic system, volute inlet valve also adopts electric operation, so the entire power plant may not oil system; The generator adopts SCR excitation to cancel the exciter, set the power brake device and mechanical brake device, in order to ensure the normal braking and shutdown of the unit, so there is no need to set the pressure system; (6) The unit automation operation, display, protection and Speed control integrated into a control system, the entire plant to achieve computer monitoring and control, in?