The “Shaanxi Economic Figures 2011†campaign organized by Shaanxi Provincial Party Committee Propaganda Department, Provincial Party Committee Policy Research Office and Provincial Academy of Social Sciences, and organized by Shaanxi Radio and Television announced on the evening of December 17th in Xi’an. The chairman and party secretary of the group company, Li Dakai, was honored. “Shaanxi Economic Figures in 2011â€, Hu Yue, Member of the Standing Committee of Shaanxi Provincial Party Committee and Propaganda Department of the Provincial Party Committee, presented the award to Chairman Li Dakai. Fastfax Group's general manager Yan Jianbo, deputy general managers Wang Fengbo, Liu Huanchen, Wang Shunli, Ma Xuyao, Chen Bing, and Ju Yili attended the award ceremony. The awarding speech given to Chairman Li Dakai by the "2011 Shaanxi Economic People" Selection Committee is: He is a practitioner of modern cutting-edge management concepts and scientific management techniques applied to enterprises, and he persists in implementing lean management and excellence performance models to lead Fast. The Group has achieved extraordinary development. Its operating indicators have ranked first in China's gear industry for many years in a row. The annual output of heavy-duty transmissions has been ranked first in the world for five consecutive years. The key technologies and core technologies of some independent innovation products have reached the international level. Level. Fast is the fastest in the world and represents the height of Shaanxi. At the same time, it has also won wide reputation for manufacturing in China. Li Dakai was listed in the 2011 Shaanxi Economic Figures Chairman Li Dakai said in an acceptance speech that it is a great honour to be able to receive the honor of “Shaanxi Economic Man 2011â€. First of all, I would like to thank my team and all staff of Fast. Honor is not only personal but also belonging to Fast. At the same time, we also feel shoulders of responsibility and pressure. Although after more than 10 years of hard work and innovation and development, the sales income of Fast has reached more than 10 billion yuan, and the production and sales volume of heavy-duty transmissions has already reached the top in the world. Still need to work hard. We are determined to continue to intensify the reform and development during the "12th Five-Year Plan" period, and further accelerate the pace of innovation and development. With more outstanding achievements, we will make new and greater contributions to the rapid development of China's auto industry and Shaanxi's economic and social development. The "Shaanxi Economic Person of the Year" selection activity began in 2009 and was held once a year. It has become an important window to showcase the development achievements of the province and the charisma of advanced figures from all walks of life. The theme of “Shaanxi Economic Figures in 2011†was selected as the theme “adjusting the structure, changing the mode, benefiting people's livelihood, and promoting developmentâ€. The aim was to select and promote one year in the “promote scientific development, prosperous Sanqin people, and build a strong western provinceâ€. Make economic contributions with outstanding contribution, industry demonstration and social influence. Through their benchmarking and leading role in all walks of life in the province, they further enhanced the sense of innovation and responsibility of the whole society and promoted the stable and rapid economic and social development in Shaanxi.
Characteristic and performance analysis of main parts of generator
Stator:
Stator consists of base, stator core and stator windings.
The base is welded by steel plate, the structure is light and sturdy, and the base is divided into many air inlet and outlet zones in the axial direction;
Stator coil:
It is stacked by strands of copper wire covered by polyester glass fiber, with half-unit type and basket shaped structure (parts of stator coils use transposition structure). The insulation grade of the stator coil is F grade. The stator coil is shaped by continuous wrapping and mould pressing with mica tapes. The coil end is firmly tied up to the support and the bundling ring with unidirectional tapes or dacron-glass ropes thus the turbo-generator unit became highly resistant towards sudden short-circuit conditions.
Stator core:
Stator core is punched and stacked by cold rolled non-oriented, high permeability, low loss high-quality silicon steel sheet, both sides of the silicon steel sheet are coated with a solid insulating film to prevent short-circuit between the stator core pieces to reduce eddy current loss.
Rotor:
The rotor is composed of shaft, coil, center ring, shroud ring and fan ring etc. The rotor coil is made of cold-drawn flat copper wires, and processed by oxygen-free annealing. The rotor coil of generator with 50MW and above is welded together by silver-bearing cold-drawn copper wires and adopts F grade insulation.
The shroud ring at rotor coil end is made of non-magnetic steel. Both ends of the rotor are equipped with centrifugal fan or axial flow fan with paddle fan blade which is forged by high-strength aluminum alloy.
Rotor machining:
The generator shaft is forged from an integral high-quality alloy steel and has an axial groove formed thereon for fitting a rotor coil and an air groove or a crescent groove is made in the large tooth to enhance the cooling of the main body and the coil end. The slots are processed by special machine for generator rotor processing, Tacchi high precision horizontal slotting and milling machine made in Italy, to ensure the high efficiency of generator.
The generator rotor must be subjected to high-speed dynamic balancing experiment and dynamic impedance experiment before delivery to verify the mechanical strength of the rotor and ensure excellent inter-turn insulation of the rotor windings.
(2)Model
Mainly produce the following model Steam Turbine Generator and the specifications are as follows:
Voltage(KV) Frequency(HZ) Power(MW)
2 poles Steam Turbine generator 6.3-3.8 50 3-60
6.6-13.8 60
4 poles steam turbine generator 0.4/0.69 6.3/6.6 10.5/11 50 0.5-30
0.4-11 60
QNP steam turbine generator uses closed-loop air self-circulation ventilation.
The rotors of turbo-generator under 50MW adopt indirect ventilation cooling method;
The rotors of 50MW and above turbo-generator is directly ventilated and cooled; an auxiliary groove is machined under the rotor winding trunking; air vents are machined on the rotor windings; with the action of the fan head and the centrifugal pressure head of the air vents, the rotor windings are directly cooled by air from the auxiliary groove and air vents.
(4)Excitation mode
QNP's steam turbine generator can adopt static silicon controlled type, two-pole AC brushless excitation and three-pole AC brushless excitation, three kinds of excitation mode.
(5)Insulation system
Adopt class F insulation materials and insulation structure, during the running time, assess the system according to class B insulation grade, meanwhile some margin has been kept.
(6)Design and acceptance criteria
Design, manufacture, inspection are carried out according to the relevant national standards, at the same time can meet the International Electrotechnical Commission IEC34-1 latest standards. According to customer`s requirements, QNP`s steam turbine generator can also be designed, manufactured and accepted according to ANSI, NEMA and other international standards.
(7)Technical Performance Analysis
1.Output margin
The series of steam turbine generator of QNP keeps 10% output margin.
2.Loss and efficiency
The steam turbine generator of QNP optimized the design and farthest minimized the additional loss and wind abrasion of generator under no-load and short-circuit condition, improved the efficiency of the generator, in general, QNP steam turbine generator`s efficiency is 0.2% higher than domestic similar models in this industry. It is higher than the national efficiency standard on the same capacity level. For example: QNP 15MW steam turbine generator`s efficiency value can reach 97.65%, and the national standard value is 97%.
3.Running reliability
QNP's steam turbine generator adopts advanced manufacturing technology, especially the rotor`s overspeed test uses high-speed dynamic balancer, rotor`s balance precision has been greatly improved, and the rotor`s vibration value is decreased. So that the steam turbine generator`s running availability factor has been improved, and the unit`s forced outage rate is decreased. At present, the availability factor of the steam turbine generator can reach about 99%, and the forced outage rate fell to 0.04% to 0.4%. Overhaul interval is up to 5 years. And the unit life can reach to 35 to 40 years.
Model meaning
QFWD-3-2A
QF Steam turbine generator
W W means brushless, without W means static silicon controlled
D D means double support, without B means single support
3 Rated power
2 2 means two poles and means the rated rotation speed is 3000 r/min
4 means four poles and means the rated rotation speed is 1500 r/min
A means the design serial number: A.B.C.D
Steam Turbine Generator,Biomass Generating,Biomass Generation,Biomass Power Generation Shandong Qingneng Power Co., Ltd. , http://www.qnpturbines.com