Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (1): 147-153.doi: 10.13229/j.cnki.jdxbgxb20191117

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Tribological properties of coating materials of tribopairs for aviation kerosene piston pump

Ji-hai JIANG(),Cun-ran ZHAO,Guan-long ZHANG,Ming-yang CHE   

  1. School of Mechatronics Engineering，Harbin Institute of Technology，Harbin 150080，China
  • Received:2019-12-05 Online:2021-01-01 Published:2021-01-20

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Abstract:

Polyimide （PI） and Poly-tetra-fluoroethylene （PTFE） have been widely used in the field of fluid boundary and mixed lubrication because of their excellent self-lubrication properties. The tribological properties of the PI based coatings and PTFE based coatings sliding against on 38CrMoAlA in 70℃ aviation kerosene were studied by altering p and v in this paper. The relationship among the wear factor k*， the linear wear rate Wt， the limiting pv and the loaded pv was discussed， and the worn surfaces of the coatings was analyzed by SEM. The results show that the wear factor k* and the limit pv are not constant values， but closely related to the wear mechanism of the coatings. The PTFE based coating against 38CrMoAlA has more excellent friction and wear properties， which make it more suitable for the tribopair material of aviation kerosene piston pump.

Key words: mechanical and electronic engineering, piston pump, coating, wear factor, wear mechanism

CLC Number: 

  • V257

Table 1

Processing properties of coatings"

Whitford Xylan? 1052Zhong Xin?
化学组成PTFE/MoS2PI/MoS2/陶瓷颗粒

烘烤温度

使用温度

320 ℃

260 ℃

400 ℃

350 ℃

颜色绿色黑色

Fig.1

Photos of specimen"

Table 2

Physical properties of coatings，substrate and counterpart"

PIPTFEQT600?338CrMoAlA
硬度/HV180260600720
粗糙度/μm2.2±1.62.4±1.80.360.36
厚度/μm45±540±3--

Fig.2

Photo of HPHST-HIT test rig"

Fig.3

Schematic diagram of disc-on-ring sliding pair and wear scar (black)"

Fig.4

Contour curve of a wear profile and physical meaning of each parameter"

Fig.5

Results of scuffing test"

Fig.6

Relationship between friction factor and time（20 min）"

Fig.7

3D and SEM image of test"

Fig.8

Wear scar contour of the test under a load of 800 N and at 1500 r/min for 20 min"

Fig.9

Relationship between friction factor and time（5/20 min）"

Fig.10

3D and SEM image of test under a load of 1200 N and at 2200 r/min for 20 min"

Fig.11

Wear scar contour of test"

Table 3

Results of three experiments"

试验名称试验考核指标涂层材料
PI基涂层PTFE基涂层
擦伤试验

极限pv值

/（MPa?m?s-1）

29.90426.592

恒定载荷

试验一

试验pv值

/（MPa?m?s-1）

9.979.97

磨损因子k*

/（mm3?N-1?m-1）

2.84×10-72.98×10-7

恒定载荷

试验二

试验pv值

/（MPa?m?s-1）

21.999.97

磨损因子k*

/（mm3?N-1?m-1）

2.38×10-63.78×10-7
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