Blade bolt used for hydroelectric generator
A technology for hydraulic generators and bolts, which is applied in the direction of screws, mechanical equipment, threaded fasteners, etc., can solve the problems that the blade bolts cannot meet the performance requirements well, and achieve the improvement of mechanical properties, obvious improvement, and long service life Improved effect
Inactive Publication Date: 2018-06-01
湖北登峰高强螺栓有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that the existing blade bolts for hydroelectric generators cannot meet the performance requirements well, and to provide a blade bolt for hydraulic generators with simple structure and excellent performance
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Embodiment Construction
[0009] see figure 1 , the present invention is a blade bolt for a hydroelectric generator, which has a bolt body, and the bolt body is provided with a threaded section A1, a round table section 3, a screw section 4 and a threaded section B7 in sequence from left to right, and the threaded section A circle of transitional semi-circle 2 is provided between A and the circular platform section, the radius of the transitional semi-circle is 5mm, and a circle of transitional groove is provided between the screw rod section and threaded section B, and the transitional groove is composed of tapered groove 5 and It is formed by connecting arc grooves 6, wherein the angle between the inclined conical surface of the cone groove and the horizontal direction is 13°, and the arc radius of the arc groove is 5mm; from the end face of the thread segment A along the axis to the end of the screw segment A cavity inner hole 9 is provided, and the diameter of the cavity inner hole is 63 mm.
[00...
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The invention relates to a blade bolt used for a hydroelectric generator. The blade bolt is provided with a bolt body. The bolt body is orderly provided with a thread segment A, a truncated cone segment, a screw segment and a thread segment B from the left to the right. A round of transitional semi-circular angle is arranged between the thread segment A and the truncated cone segment. The radius of the transitional semi-circular angle is 5 mm. A round of transitional groove is arranged between the screw segment and the thread segment B. The transitional groove is formed by connection of a conical groove and a curved groove. An inclined angle formed between an oblique conical surface of a conical-surface groove and the horizontal direction is 13 degrees. The circular arc radius of the curved groove is 5 mm. A cavity inner hole is arranged from the end surface of the threaded segment A to the tail end of the screw segment along the inside of the axial direction. The diameter of the cavity inner hole is 63mm. By arranging the transitional semi-circular angle and the transitional groove on the bolt body and increasing the thickness of the cavity inner hole, mechanical performance of the blade bolt is greatly improved. Compared with a conventional blade bolt, performance of the blade bolt is increased by more than 15%. The improvement is evident. The service lifetime of the blade bolt is substantially prolonged.
Description
technical field [0001] The invention relates to the technical field of metal parts for generators, in particular to blade bolts for hydraulic generators. Background technique [0002] The blade bolt is a very important part of the hydroelectric generator. Usually, when the pressure reaches 376MPa, the elongation of the bolt part cannot be greater than 0.6mm to meet the performance requirements. Otherwise, due to strong vibration and other working conditions during use However, it is easy to deform or even crack after a long time, and the mechanical properties of the existing blade bolts often suffer from yield fatigue. Therefore, it is necessary to improve the structure of the blade bolts used in hydroelectric generators. . Contents of the invention [0003] The purpose of the present invention is to solve the problem that the existing blade bolts for hydroelectric generators cannot meet the performance requirements well, and provide a blade bolts for hydraulic generators...
Claims
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IPC IPC(8): F16B35/04
CPCF16B35/041
Inventor 梅列文梅小文黄朝军黄治乾
Owner 湖北登峰高强螺栓有限公司