Analysis on Dynamic Characteristics of External Oil Pipe System of Integrated Transmission Device in Armoured Vehicle

doi:10.12382/bgxb.2022.0630

Abstract

Abstract:

For the failure caused by the deterioration of the dynamic characteristics of external oil pipe in the integrated transmission device of armoured vehicle, the dynamic characteristics and structure strength change laws of external oil pipe under the dynamic excitation of different vehicle speeds are studied, and the effective optimization and improvement measures for the external oil pipe are proposed. The dynamic characteristics of typical external lubricating oil pipe and oil supply pipe system on the integrated transmission device are analyzed. The load excitation of key parts of the oil pipe is obtained by test. The transient dynamic simulation and theoretical dynamic modeling are conducted to study the influence of key parameters on the dynamic characteristics of oil pipe system, and an optimization and improvement scheme of the dynamic characteristics is proposed. The vibration amplitude of key parts of the oil pipe system have decreased by more than 15%.

Key words: armoured vehicle, integrated transmission device, external oil pipe, dynamic characteristics, transient dynamic simulation

CLC Number:

U463.212

GAO Pu, LI Hongcai, LIU Hui, MENG Jieke. Analysis on Dynamic Characteristics of External Oil Pipe System of Integrated Transmission Device in Armoured Vehicle[J]. Acta Armamentarii, 2023, 44(11): 3447-3454.

Figures/Tables 19

Fig.1 Oil circuit layout of integrated transmission device

Fig.2 LMS data acquisition system (left) and vibration acceleration sensor (right)

Fig.3 Key measure position label of top lubricating oil pipe

Fig.4 Serial number of Key measuring positions of side lubricating oil pipe

Fig.5 Vibration accelerationat key measuring point

Table 1 Vibration acceleration amplitudes in different directions at different measuring points

方向	测点5 振动加速度幅值/g	测点10 振动加速度幅值/g
x轴	7.50	6.10
y轴	10.10	3.85
z轴	10.05	7.60

Fig.6 Vibrationdisplacement of key measuring point

Table 2 Stress results of top oil pipe at different speeds

序号	工况	最大应力/MPa
1	低速	69.876
2	中速	27.651
3	高速	13.382

Table 3 Stress results of side oil pipe at different speeds

序号	工况	最大应力/MPa
1	低速	155.760
2	中速	92.557
3	高速	69.427

Fig.7 Before and after modification of top (lift) oil pipe (right)

Fig.8 Stress cloud diagram of top oil pipe at low-speed

Fig.9 Stress cloud diagram of removing of elbow and change in direction of side oil pipe

Fig.10 Stress concentration part increased by 20mm

Fig.11 Oil supply pipe layout and three-dimensional model

Fig.12 Pump-pipe-box model

Table 4 Vibration displacements of key positions of oil supply pipe

序号	位置	位移变化量/mm
1	滤清器	0~0.6
2	油管上端	0~0.8
3	油管下端	0~2.0

Fig.13 Vibration displacement y1 before and after modification

Fig.14 Vibration displacement y2 before and after modification

Fig.15 Vibration displacement y3 before and after modification

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