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Bionic non smooth abrasion-proof gear wheel

A non-smooth, geared technology used in belts/chains/gears, components with teeth, portable lifting devices, etc., to solve problems such as wear off, long processing time, reduced gear effectiveness, etc., to improve wear resistance , Improve gear lubrication conditions, improve the effect of gear wear resistance

Inactive Publication Date: 2008-06-04
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these methods have a long processing period and high cost, and the thickness of the hardened layer is thin, which is often worn off quickly during use, reducing the effectiveness of the gear in various working conditions.
Moreover, the degree of improvement in gear wear resistance is also limited, and the problem of wear on the surface of the gear tooth profile cannot be fundamentally solved.

Method used

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  • Bionic non smooth abrasion-proof gear wheel
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  • Bionic non smooth abrasion-proof gear wheel

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Example 1 The application of the present invention to the high-speed gear transmission in the helical cylindrical gear reducer of screw conveyor

[0025] Reference Figure 5 The ellipsoid pit is a non-smooth pit shape optimized and designed according to the theory of tribology. The long axis of the ellipsoid is 40μm, the short axis is 30μm, the depth of the pit is 25μm, and the center distance between the two pits is s. 1 =s 2 =200μm, α=30°. Number of pinion teeth Z in helical cylindrical gear transmission 1 =25, the number of teeth of the large gear Z 2 =80, helix angle β=15°25'36″, the large and small gears are made of 40Cr, and the surface is quenched after quenching and tempering. The tooth surface hardness is 50HRC, level 7 precision, and the gears and non-smooth gears with bionic non-smooth surface treatment When processed gears work under the same conditions, the mutual friction coefficient is reduced by 18%, while the life of gears with bionic non-smooth surfaces is...

example 2

[0026] Example 2 The application of the present invention in a pair of spur gear transmission in a machine tool gearbox

[0027] Reference Figure 5 , The long axis of the ellipsoidal pit is 50μm, the short axis is 40μm, the pit depth is 25μm, and the center distance between the two pits is s 1 =s 2 =250μm, α=30°. The number of pinion teeth Z in this example 1 =21, the number of teeth of the large gear Z 2 =33, the large and small gears are made of 40Cr, and the surface is quenched after quenching and tempering. The hardness of the tooth surface is 48HRC, level 7 precision. The gears and untreated gears with bionic non-smooth surface treatment will interact with each other when working under the same conditions. The coefficient of inter-friction can be reduced by 17%, the life of a gear with a bionic non-smooth surface is 3.7 times that of an untreated gear, and the cost of processing a bionic non-smooth gear is increased by about 22%.

example 3

[0028] Example 3 Application of the present invention to a closed common cylindrical worm drive for a mixer

[0029] Reference Figure 5 , The long axis of the ellipsoidal pit is 60μm, the short axis is 50μm, the pit depth is 25μm, and the center distance between the two pits is s 1 =s 2 =300μm, α=30°. Number of worm heads in worm drive Z 1 =2, the material is 45 steel, the surface is high-frequency hardened, the hardness is 52HRC, the number of worm gear teeth is Z 2 = 40, the material is ZcuSn10P1, sand mold casting. Gears and untreated gears with bionic non-smooth surface treatment work under the same conditions, and the friction coefficient between each other is reduced by 15%. The life of bionic non-smooth gears is 3.4 times that of untreated gears, and the cost of processing bionic non-smooth gears increases 25%.

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Abstract

The invention relates to a design of wearable appearance of gear teeth and the manufacturing technique, for applying bionic nonsmooth theory to provide a bionic nonsmooth wearable gear able to effectively gear surface wearability. And it makes engaging friction surfaces of gear teeth into bionic nonsmooth surfaces, i.e. its teeth surfaces are distributed with ellipsoidal-pit, groove or grid nonsmooth unit bodies whose surfaces each have a 25 mum height difference from the surface of the basal body of the gear and whose distribution density is the ratio of geometric projected area on the surface of the basal body to the basal body area S=15~30%, and the hardness difference between the materials of the unit bodies and the basal body is 20-40 HRC, and these unit bodies the lubricated state of gear engaging and driving, thus improving gear wearability. The method is a more reasonable, effective, gear wearability-improving method.

Description

Technical field [0001] The invention relates to the field of mechanical processing. In particular, it relates to the design and manufacturing technology of the wear-resistant profile of gear teeth. Background technique [0002] Gear mechanism is the most widely used transmission mechanism in modern mechanisms. Its transmission is accurate, stable, high mechanical efficiency, long service life, safe and reliable. In the process of gear transmission, one of the main failure modes is the wear of the tooth profile surface. The wear of the tooth profile is the result of the two main factors of abrasive friction and fatigue in the case of poor lubrication. After severe wear, the geometric characteristics of the tooth profile change, and the tooth side clearance increases, causing uneven transmission, and in severe cases, it may cause tooth breakage. At home and abroad, in order to improve the wear resistance of the gear surface, in addition to looking for new wear-reducing and wear-res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/08
Inventor 韩志武任露泉杨卓娟崔占荣董立春殷士琦
Owner JILIN UNIV