Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (4): 781-788.doi: 10.13229/j.cnki.jdxbgxb20200919

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Dynamic simulation analysis and wear failure of dual-phase timing bush chain

Ya-bing CHENG(),Lu-xiang CHEN,Ping-yu GE,Ze-yu YANG,Peng-yu CAO   

  1. College of Mechanical and Aerospace Engineering，Jilin University，Changchun 130022，China
  • Received:2021-07-28 Online:2022-04-01 Published:2022-04-20

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Abstract:

In order to reduce the fluctuation of the automobile engine timing chain transmission system and increase the transmission load of the engine， this paper proposes a new type of dual-phase timing bush chain transmission system. This new type of dual-phase chain transmission system effectively reduces the vibration caused by the contact between the sleeve and the sprocket by changing the position of each phase sprocket， and suppresses the transmission noise to a certain extent. Through dynamic simulation analysis， some dynamic parameters are selected for comparison with the single-phase system. The results show that the transmission performance of the dual-phase timing chain transmission system is better than that of the single-phase timing system. The wear failure study provides a scientific basis for further analysis of the service life of the timing bushing chain drive system.

Key words: mechanical design, timing bush chain, dual-phase transmission, dynamics analysis, wear failure

CLC Number: 

  • TH132.45

Fig.1

Structure layout of timing bush chain system"

Fig.2

Schematic diagram of chain plate parameterdesign"

Fig.3

Schematic diagram of crankshaft dual-phase sprocket structure"

Fig.4

Schematic diagram of crankshaft dual-phase sprocket parameter design"

Fig.5

Schematic diagram of guide plate design"

Fig.6

Schematic diagram of tension plate design"

Fig.7

Flow chart of dynamics analysis"

Fig.8

Dynamic simulation model of dual-phase timing bush chain transmission system"

Fig.9

Trajectory of chain plate at different speeds"

Fig.10

Instantaneous transmission ratio of single- phase and dual-phase timing chain transmission systems"

Fig.11

Angular velocity fluctuation of chain plate under condition of 2000 r/min"

Fig.12

Angular velocity fluctuation of chain plate under condition of 4000 r/min"

Fig.13

Electron microscopic scanning of bush surface"

Fig.14

Electron microscopic scan at position 1"

Fig.15

Electron microscopic scan at position 2"

Fig.16

Scanning electron microscope at fracture of bush"

Fig.17

Electron microscopic scan at position 3"

Fig.18

Electron microscopic scan at position 4"

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