Study and Validation of Resistance Torque Characteristics of Hydro-Mechanical Comprehensive Transmission Device under Low Temperature Conditions

doi:10.12382/bgxb.2022.0182

Abstract

Abstract:

To address the challenge of fast starting of the hydro-mechanical comprehensive transmission device (HMCTD) in low temperature conditions, the transmission characteristics should be tested within a low-temperature range. This study focuses on the resistance torque characteristics of the HMCTD and a single rotating part, both subjected to low-temperature conditions, through running resistance torque characteristic test and flow field analysis. The results show that the resistance torque of the HMCTD decreases with increasing input rotating speed, which is further validated through the single rotating part test. By comparing the flow field at different temperatures, it is concluded that the non-Newtonian behavior of the oil plays a significant role.

Key words: hydro-mechanical comprehensive transmission device, low temperature condition, resistance torque characteristic, experiment, non-Newtonian fluid

XU Baorong, ZHANG Jinbao, YAO Ligang, ZOU Tiangang, WAN Li. Study and Validation of Resistance Torque Characteristics of Hydro-Mechanical Comprehensive Transmission Device under Low Temperature Conditions[J]. Acta Armamentarii, 2023, 44(6): 1829-1836.

Figures/Tables 16

Fig.1 Schematic diagram of the HMCTD[21]

Table 1 Cold starting scheme design

预设温度/℃	输入转速/(r·min^-1)	稳态阻力矩/(N·m)
	200	2300
-46	500	1400
	800	1200
	200	1600
-36	500	1300
	800	1200
	200	1100
-20	500	1100
	800	1100
	200	250
0	500	300
	800	350
	200	200
20	500	250
	800	300

Fig.2 Low Temperature Laboratory for the HMCTD

Fig.3 Coldstarting data of the HMCTD

Fig.4 Speed-Temperature-Torque relationship

Fig.5 Flow field analysis of the HMCTD during the starting process at 90℃ and 2200r/min

Fig.6 Stable flow field of the HMCTD at -43℃ and 800r/min

Fig.7 Testing of 5W-40 lubricating oil

Fig.8 Comparison of the characteristics of the 5W-40 lubricating oil at different temperatures

Fig.9 Kinematic viscosity of the 5W-40 lubricating oil with temperature

Fig.10 Density of the 5W-40 lubricating oil with temperature

Fig.11 Testing device for the resistance torque of the rotating part at low temperatures

Fig.12 Resistance torque characteristics of the rotating part at low temperatures

Fig.13 Oil distribution at 23℃ with kinematic viscosity at 63.5mm2/s

Fig.14 Oil distribution at -20℃ with kinematic viscosity at 286.2mm2/s

Fig.15 Oil distribution at -40℃ with kinematic viscosityat 704.3mm2/s

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