Wind power plant equipment mainly includes the following parts: gearbox (lifting box), generator set, blades, tower base and substation. At present, wind power generation is gradually developing to high-power units, requiring high reliability and long life cycle, so the accuracy and functional requirements of components are high.
With the development of wind power generation technology, the principle and structure of wind turbines are also changing. The future wind turbines are developing in the direction of simplification of structure and volume reduction. At present, China is developing gearless box wind turbines. For example, the Power Generation Equipment Engineering Research Center of Harbin Power Generation Equipment Group has developed gearless box variable pitch permanent magnet wind turbines, and is developing "variable frequency constant frequency wind turbines" and "direct drive variable speed wind turbines", etc. The asynchronous generator set driven by the gearbox has the advantages of low manufacturing cost, reliable operation and easy maintenance, and has independent intellectual property rights.
At present, the most production is gearbox wind turbines. Due to the complicated structure, the manufacture of various components requires different machine tools for processing.
The gearbox of the fan is mainly composed of a box, a planetary gear train and a shifting mechanism. The fan gearbox body is a large-sized box, and the diameter is about 2 to 3 m depending on the amount of power generation, and most of them are separated structures. The machining requires a CNC floor-type milling and boring machine with a diameter of about 160250mm, a large horizontal machining center, and a gantry machining center. The machining accuracy is high. At present, the main equipment is imported equipment.
The gears in the gearbox are processed in large quantities and require large-scale production of large internal ring gears, cylindrical spur gears and helical gears. The main processing equipment is large-scale CNC vertical gear hobbing machine, CNC gear shaping machine, CNC gear grinding machine and so on. Among these gear processing machines, large-size CNC gear machine tools generally require high-efficiency, heavy-duty, heavy-cut, and rigid features, mainly relying on imports, and small and medium-sized domestically produced equipment. Among them, large-size, large-modulus gears and ring gears adopt CNC forming gear milling machine and CNC forming gear grinding machine. CNC forming gear milling machine requires large depth of cut, large feed and high rolling speed. CNC forming gear grinding machine requires precision of more than 5 grades, high degree of automation, automatic centering, automatic measurement, automatic shape modification and high stability. At present, the company that manufactures gearboxes for wind power in China mainly has Nanjing Gaojing Gear Co., Ltd. The production task of the plant is very busy. It can't fully meet the market demand after three shifts in the long run. Therefore, the processing equipment is required to be stable and reliable. At present, the gear processing machine used by the factory is basically imported equipment.
The principle and structure of the generator for wind power are basically the same as those of other generators such as thermal power. Most wind power generators use kilowatt-class generators, and the 10,000-kilowatt-class generators used in thermal power are classified into different levels. From the manufacturing point of view, there is not much difficulty. Enterprises that can manufacture thermal power generator sets can generally meet the requirements for manufacturing wind power generator sets. However, wind turbine generators require a service life of more than 20 years, which requires higher stability and reliability.
The blades of the fan are mostly made of composite materials such as epoxy glass fiber or carbon fiber. The blade design mainly uses full three-dimensional aerodynamic simulation and structural finite element simulation, and the vacuum infusion process is used for blade production. There is less machining and some parts need to be die cut.
The pitching mechanism of the blade mainly includes a pitch motor, a speed reducer and a pitch controller. There are no special requirements for manufacturing equipment, and domestic machine tools can meet the demand.
The main components of the yaw mechanism are large bearings with internal and external teeth, four small gears and shifting devices. This kind of large-sized bearing is currently not manufactured in China, mainly relying on imports. Domestic Tianma shares will develop and manufacture large bearings for yaw mechanisms. Its processing equipment is mainly some special machine tools and equipment with high requirements. For example, at CCMT2008, three large-scale CNC special-purpose machine tools exhibited by Qizhong CNC Equipment Co., Ltd. are equipment for processing large-scale gears for wind power.
With the development of wind power generation technology, the principle and structure of wind turbines are also changing. The future wind turbines are developing in the direction of simplification of structure and volume reduction. At present, China is developing gearless box wind turbines. For example, the Power Generation Equipment Engineering Research Center of Harbin Power Generation Equipment Group has developed gearless box variable pitch permanent magnet wind turbines, and is developing "variable frequency constant frequency wind turbines" and "direct drive variable speed wind turbines", etc. The asynchronous generator set driven by the gearbox has the advantages of low manufacturing cost, reliable operation and easy maintenance, and has independent intellectual property rights.
At present, the most production is gearbox wind turbines. Due to the complicated structure, the manufacture of various components requires different machine tools for processing.
The gearbox of the fan is mainly composed of a box, a planetary gear train and a shifting mechanism. The fan gearbox body is a large-sized box, and the diameter is about 2 to 3 m depending on the amount of power generation, and most of them are separated structures. The machining requires a CNC floor-type milling and boring machine with a diameter of about 160250mm, a large horizontal machining center, and a gantry machining center. The machining accuracy is high. At present, the main equipment is imported equipment.
The gears in the gearbox are processed in large quantities and require large-scale production of large internal ring gears, cylindrical spur gears and helical gears. The main processing equipment is large-scale CNC vertical gear hobbing machine, CNC gear shaping machine, CNC gear grinding machine and so on. Among these gear processing machines, large-size CNC gear machine tools generally require high-efficiency, heavy-duty, heavy-cut, and rigid features, mainly relying on imports, and small and medium-sized domestically produced equipment. Among them, large-size, large-modulus gears and ring gears adopt CNC forming gear milling machine and CNC forming gear grinding machine. CNC forming gear milling machine requires large depth of cut, large feed and high rolling speed. CNC forming gear grinding machine requires precision of more than 5 grades, high degree of automation, automatic centering, automatic measurement, automatic shape modification and high stability. At present, the company that manufactures gearboxes for wind power in China mainly has Nanjing Gaojing Gear Co., Ltd. The production task of the plant is very busy. It can't fully meet the market demand after three shifts in the long run. Therefore, the processing equipment is required to be stable and reliable. At present, the gear processing machine used by the factory is basically imported equipment.
The principle and structure of the generator for wind power are basically the same as those of other generators such as thermal power. Most wind power generators use kilowatt-class generators, and the 10,000-kilowatt-class generators used in thermal power are classified into different levels. From the manufacturing point of view, there is not much difficulty. Enterprises that can manufacture thermal power generator sets can generally meet the requirements for manufacturing wind power generator sets. However, wind turbine generators require a service life of more than 20 years, which requires higher stability and reliability.
The blades of the fan are mostly made of composite materials such as epoxy glass fiber or carbon fiber. The blade design mainly uses full three-dimensional aerodynamic simulation and structural finite element simulation, and the vacuum infusion process is used for blade production. There is less machining and some parts need to be die cut.
The pitching mechanism of the blade mainly includes a pitch motor, a speed reducer and a pitch controller. There are no special requirements for manufacturing equipment, and domestic machine tools can meet the demand.
The main components of the yaw mechanism are large bearings with internal and external teeth, four small gears and shifting devices. This kind of large-sized bearing is currently not manufactured in China, mainly relying on imports. Domestic Tianma shares will develop and manufacture large bearings for yaw mechanisms. Its processing equipment is mainly some special machine tools and equipment with high requirements. For example, at CCMT2008, three large-scale CNC special-purpose machine tools exhibited by Qizhong CNC Equipment Co., Ltd. are equipment for processing large-scale gears for wind power.
The male and female Screws are mainly used in computer, circuit board and other industries. When one end is screwed into the locked object, the hexagonal column is exposed, which can fix or isolate other objects. The male and female screws are assembled on the computer host. The external thread connects the main board inside the host. The internal thread separates the main board from the sheet metal shell. The terminal line to be connected is connected with a screw from the internal thread of the sheet metal shell and the male and female copper column.
Main specifications
The main specifications of male and female screws are m3, M4, M5, M6, M8, m10and so on. Their hexagonal columns are 5, 6, 8, 10, 12, 15mm and so on, among which m3 series is the most suitable. In addition to copper, there are stainless steel, fast cutting steel and so on.
Din316 Wing Screws,Female Male Screws,Hexagonal Column Screw,Flat Point Hollow Set Screw
Suzhou Gubao Screws Co.,Ltd. , https://www.hongyiscrew.com