Characteristic Analysis of Damping Valve in Hydro-pneumatic Suspension of Tracked Vehicle Based on Bonding-diagram

doi:10.12382/bgxb.2023.0654

Abstract

Abstract:

To optimize the damping characteristics of vehicle suspension, a parametric model for the damping characteristics of damping valve in hydro-pneumatic suspension is established based on the bonding diagram method. According to the dfferent working modes of damping valve before and after opening and closing during compression stroke and during recovery stroke, the throttling form of damping valve under different working conditions is analyzed, and a damping characteristic model for the compression and recovery strokes of damping valve are established by combining the knowledge of fluid dynamics. The influences of structural parameters on the compression stroke, recovery stroke and flow rate of valve opening point are analyzed by simulation. A flow test bench is designed to verify the simulation results of damping valve characteristics. The results show that the characteristic model of damping valve established by the bonding diagram method can accurately calculate the characteristics of damping valve, the diameters of orifices 2 and 3 in the spool are decreased to reduce the opening speed of damping valve, the diameters of orifices 1 and 4 are adjusted to regulate the damping force accordingly without affecting the opening speed, and the diameter of orifice 6 only affects the damping force on the recovery stroke.

Key words: tracked vehicle, damping characteristics, fluid mechanics, hydro-pneumatic spring, flow rate of open valve

CLC Number:

TB123

NIE Wei, HE Hongwen, LEI Qiangshun, WAN Yiqiang. Characteristic Analysis of Damping Valve in Hydro-pneumatic Suspension of Tracked Vehicle Based on Bonding-diagram[J]. Acta Armamentarii, 2024, 45(8): 2728-2736.

Figures/Tables 16

Fig.1 Structural diagram of hydro-pneumatic suspension damping valve

Fig.2 Working principle of compression stroke damping valve

Fig.3 Working principle of recovery stroke damping valve

Fig.4 Hydraulic schematic diagram of damping valve

Fig.5 Damping characteristic bonding diagram model

Table 1 Simulation parameter table

类别	参数名称	数值
材料参数	油液动力黏度/(N·s·m^-2)	1.35×10^-2
	通孔1直径/mm	14
	通孔2直径/mm	14
	通孔3直径/mm	8
结构参数	通孔4直径/mm	7
	通孔5直径/mm	7
	通孔6直径/mm	7
	背压弹簧预压力/N	95
	背压弹簧刚度/(N·mm^-1)	10
	单向阀芯直径/mm	50

Fig.6 Damping characteristics of damping valves

Fig.7 Damping valve characteristic test bench

Fig.8 Comparison of damping valve characteristic test data

Table 2 Data comparison table

流量/ (L·min^-1)	试验压力差/MPa	仿真结果/ MPa	绝对误差/ MPa
150	0.67	0.67	0
120	0.58	0.66	0.08
90	0.58	0.59	0.01
60	0.32	0.30	0.02
30	0.90	1.00	0.10
0	-0.02	0	0.02
-30	-0.06	-0.02	0.04
-60	-0.13	-0.08	0.05
-90	-0.23	-0.17	0.06
-120	-0.37	-0.28	0.09
-150	-0.52	-0.44	0.80

Fig.9 Effect of Orifice 1 diameter on damping characteristics

Fig.10 Effect of Orifice 2 diameter on damping characteristics

Fig.11 Effect of Orifice 3 diameter on damping characteristics

Fig.12 Effect of Orifice 4 diameter on damping characteristics

Fig.13 Effect of Orifice 5 diameter on damping characteristics

Fig.14 Effect of Orifice 6 diameter on damping characteristics

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