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Heavy-duty gear capable of improving bearing capacity of lubricating oil film

A technology of bearing capacity and lubricating oil film, applied in the directions of gear lubrication/cooling, belt/chain/gear, gear vibration/noise attenuation, etc., can solve the thermal characteristics change, the coating is easy to fall off, and it is impossible to take into account the multiple performance integration of gear meshing transmission. optimization and other issues to achieve the effects of reducing frictional vibration, reducing energy accumulation on the tooth surface, reducing energy accumulation and frictional vibration on the tooth surface

Pending Publication Date: 2022-04-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the surface coating technology can effectively enhance the anti-friction performance of gears, the change of the friction coefficient when using special friction materials will lead to changes in the thermal characteristics during the engagement process, and the coating is easy to fall off when the gears are engaged in transmission under heavy load conditions. Taking into account the needs of comprehensive optimization of multiple performances during gear meshing transmission

Method used

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  • Heavy-duty gear capable of improving bearing capacity of lubricating oil film
  • Heavy-duty gear capable of improving bearing capacity of lubricating oil film
  • Heavy-duty gear capable of improving bearing capacity of lubricating oil film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 2 As shown, the outline where the pit 2 intersects with the tooth surface 13 is a circle. The distance between the two adjacent upper pits 21 is L 1 , the distance between the two adjacent lower pits 22 is L 2 , the L 1 with L 2 Equivalently, its range is 400-800 μm.

[0041] The contour projected diameter of the intersection of the upper dimple 21 and the tooth surface 13 is D 1 , the depth from the tooth surface 13 to the bottom of the upper pit 21 is H 1 ; The contour projected diameter of the intersection of the lower pit 22 and the tooth surface 13 is D 2 , the depth from the tooth surface 13 to the bottom of the lower pit 22 is H 2 ; the D 1 with D 2 equal, its range is 50-100μm; the H 1 with H 2 Equivalently, its range is 10-50 μm.

Embodiment 2

[0043] Such as image 3 As shown, the distance between the adjacent rows of the upper dimples 21 gradually decreases from the pitch circle area 14 to the tooth top 12; the minimum distance L between the rows of the upper dimples 21 is min 400μm, maximum L max is 800μm, and its gradient value is divided by the maximum difference of the pitch divided by the gradient amount;

[0044] The distance between the adjacent rows of the lower dimples 22 gradually decreases from the pitch circle area 14 to the dedendum 11; the minimum distance L between the rows of the lower dimples 22 is min 400μm, maximum L max It is 800μm, and its change gradient value is divided by the maximum difference of the pitch divided by the gradient amount.

Embodiment 3

[0046] Such as Figure 4 As shown, the diameter of the upper dimple 21 gradually increases from the pitch circle area 14 to the contour projection diameter of the adjacent rows intersecting the tooth surface 13 in the direction of the tooth top 12; the lower dimple 22 gradually increases from the pitch circle area 14 to The minimum diameter D of the contour projection intersecting the tooth surface 13 between adjacent rows in the direction of the tooth root 11 min 50μm, the largest diameter D max is 100μm, and its change gradient value is the maximum difference of the diameter divided by the gradient amount;

[0047] The projected diameter of the lower dimple 22 gradually increases from the pitch circle area 14 to the dedendum 11. The minimum diameter D of the contour projection intersecting the tooth surface 13 between adjacent rows min 50μm, the largest diameter D max is 100μm, and its change gradient value is the maximum difference of the diameter divided by the gradien...

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Abstract

The invention discloses a heavy-duty gear capable of improving the bearing capacity of a lubricating oil film. The heavy-duty gear comprises a gear tooth body, the gear tooth body comprises a tooth root, a tooth crest and a tooth surface, the intersecting line of the tooth surface and an indexing cylindrical surface is a tooth line, the intersecting line area of a pitch circle and the tooth surface during gear meshing is a pitch circle area, and the tooth line is located in the pitch circle area; and pits are formed in the surface of the tooth surface. The gear with the pit structures on the tooth surface has the beneficial effects that the gear with the pit structures on the tooth surface is provided according to the performance requirements of comprehensively optimizing surface friction wear and vibration noise in the gear tooth meshing process. The non-pitch circle area of the tooth surface is provided with the circular pit structure, on one hand, more lubricating media can be stored, the oil film thickness is effectively increased, the oil film temperature rise is reduced, the tooth surface friction and wear performance is improved, and the service life is prolonged; and on the other hand, in the gear tooth meshing process, due to the existence of the pit structures, the tooth surface meshing contact state changes, the stress concentration phenomenon is relieved, and tooth surface energy accumulation and friction vibration are effectively reduced.

Description

technical field [0001] The invention relates to a surface structure of a gear, in particular to a heavy-duty gear that improves the bearing capacity of a lubricating oil film, and belongs to the technical field of mechanical transmission. Background technique [0002] As a basic transmission component, gears play a vital role in the transmission system of industrial machines and vehicles due to their precise and reliable transmission. Especially with the research and development of large-scale high-end equipment for mechanical engineering power transmission, higher requirements are put forward for the mechanical performance of the equipment, and the quality of gear performance is one of the key factors determining its mechanical transmission performance. Different from the general transmission mode, the lubrication, friction and percussion vibration performance of the gear meshing transmission is very complicated. On the one hand, the gears work under heavy load conditions f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/08F16H57/04
CPCF16H55/08F16H57/0409F16H57/045F16H57/0006
Inventor 胡南镕贾和坤徐波尹必峰顾笑王雪峰
Owner JIANGSU UNIV
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