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Bionic non smooth abrasion-proof gear wheel

A non-smooth, gear technology, used in belts/chains/gears, components with teeth, winches, etc., can solve the problems of reducing the effectiveness of gears, long processing time, wear and other problems, and improve the wear resistance of gears. performance, improved gear lubrication conditions, and improved wear resistance

Inactive Publication Date: 2006-06-28
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 the wear resistance of gears 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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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] Example 1 Application of the present invention to the high-speed gear transmission in the helical cylindrical gear reducer of the screw conveyor

[0024] refer to Figure 5 , the ellipsoidal pit is a non-smooth pit shape optimized according to the theory of tribology, in which the major axis of the ellipsoid is 40 μm, the minor axis is 30 μm, the pit depth is 25 μm, and the distance between the centers of the two pits is s 1 =s 2 = 200 μm, α = 30°. Number of pinion teeth Z in helical spur gear transmission 1 =25, large gear teeth number Z 2 =80, helix angle β=15°25′36″, both large and small gears are made of 40Cr, the surface is quenched after quenching and tempering treatment, the hardness of the tooth surface is 50HRC, the precision is 7, the gears with bionic non-smooth surface treatment and untreated Treated gears, when working 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

[0025] Example 2 Application of the present invention in the transmission of a pair of spur gears in a certain machine tool gearbox

[0026] refer to Figure 5 , the long axis of the ellipsoidal pit is 50 μm, the short axis is 40 μm, the depth of the pit is 25 μm, and the distance between the centers of the two pits is s 1 =s 2 = 250 μm, α = 30°. The number of pinion teeth Z in this example 1 =21, large gear teeth number Z 2 =33, the material of the large and small gears is 40Cr, the surface is quenched after quenching and tempering, the hardness of the tooth surface is 48HRC, and the precision is 7. When the gears with bionic non-smooth surface treatment and untreated gears work under the same conditions, they The friction coefficient can be reduced by 17%, the service life of the gear with the bionic non-smooth surface is 3.7 times that of the untreated gear, and the cost of processing the bionic non-smooth gear is increased by about 22%.

example 3

[0027] Example 3 Application of the present invention on the closed common cylindrical worm drive for mixer

[0028] refer to Figure 5 , the long axis of the ellipsoidal pit is 60 μm, the short axis is 50 μm, the depth of the pit is 25 μm, and the distance between the centers of the two pits is s 1 = S 2 = 300 μm, α = 30°. Number of worm heads in worm drives Z 1 = 2, the material is 45 steel, the surface is high-frequency quenched, the hardness is 52HRC, and the number of worm gear teeth is Z 2 =40, the material is ZcuSn10P1, sand casting. The gears with bionic non-smooth surface treatment and untreated gears work under the same conditions, and the mutual friction coefficient is reduced by 15%, while 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=15í½30úÑ, 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 machining. In particular, it involves the design and manufacturing processing technology of the wear-resistant shape of gear teeth. Background technique [0002] The gear mechanism is the most widely used transmission mechanism in modern mechanisms. Its transmission is accurate, stable, high in mechanical efficiency, long in service life, and safe and reliable in operation. During gear transmission, one of the main failure modes is the wear of tooth profile surfaces. The wear of the tooth profile is the result of the two main factors of abrasive friction and wear and fatigue friction and wear under the condition of poor lubrication. After severe wear, the geometric characteristics of the tooth profile change, and the backlash of the tooth side increases, causing the transmission to be unstable, and in severe cases, it will cause broken teeth. At home and abroad, in order to improve the wear resistance of the gea...

Claims

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Application Information

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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
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