Performance introduction of VN 1 wheeled infantry fighting vehicle

Field Maneuverability Test of New Wheeled Infantry Fighting Vehicle in China; The first two axles of VNl Wheeled Infantry Fighting Vehicle abandoned the design of wz55 1 double wishbone independent suspension, and adopted McPherson suspension (also known as sliding column swing arm independent suspension). This kind of suspension usually consists of two basic parts: strut shock absorber and A-shaped lower bracket. It is called strut shock absorber because it can not only absorb vibration, but also support the whole body, but its structure is extremely compact, integrating shock absorber and shock absorber spring to form a strut that can move up and down; The lower bracket arm is usually a-shaped, which is used to provide partial lateral support for the wheel and bear all the front and rear stresses. The weight of the whole car body and all the impact forces borne by the wheels in the process of movement depend on these two components. Compared with WZ55 1 double wishbone independent suspension, McPherson independent suspension has one less A-arm; Compared with WZ523 unequal length double wishbone independent suspension shock absorber and torsion bar, McPherson independent suspension shock absorber and suspension elastic element are integrated. Therefore, the McPherson independent suspension has the advantages of simple and compact structure, which makes the suspension light in weight and occupies small space. As we all know, automobile suspension system belongs to moving parts. The lighter the moving parts, the faster the response speed and rebound speed of the suspension, and the stronger the shock absorption effect, which can further increase the comfort of the vehicle occupants under the condition of a certain body weight. The direct benefit of small space is that designers can arrange larger engines in the engine compartment in any way. Based on this effect, German "Boxer" wheeled vehicles simply adopt a more compact transverse layout of engines to improve the requirements of vehicle modular design for bearing space. In addition, the McPherson type is a suspension form consisting of articulated pillars and lower cross arms. The shock absorber can also be used as a steering kingpin around which the steering knuckle can rotate. Its characteristic is that the position of the kingpin and the positioning angle of the front wheel change with the up-and-down jumping of the wheel, which is just the opposite of candle hanging. This suspension has the advantages of simple structure, compact layout, small front wheel alignment change and good driving stability. It is selected as the front axle suspension by most wheeled vehicles, and the first ground weapon using this suspension device is the piranha wheeled armored vehicle family. The disadvantages of this suspension are: because the shock absorber and damping spring are used as kingpins and bear the lateral force acting on the wheel from the ground at the same time, the resistance is large when moving up and down, and the wear is increased; When turning sharply, the left and right wheels tilt outward due to the body roll, resulting in insufficient steering, and the softer the spring, the greater the tendency. Therefore, this kind of suspension has higher requirements on the manufacturing process of A-type lower bracket and damping spring. But it is trustworthy that the suspension spring of VNl wheeled infantry fighting vehicle is an adjustable hydro-pneumatic spring. In terms of oil-gas spring suspension, the exposed Japanese TK-X new main battle tank is famous for its oil-gas spring suspension. What are the advantages of hydro-pneumatic spring suspension? There are generally five kinds of suspensions used in ground vehicles: torsion bar spring, leaf spring, spiral spring, air spring and oil-gas spring. Among them, torsion bar spring and leaf spring are famous for their firmness and reliability, but the disadvantage is that they occupy a lot of vehicle space. The main advantages of spiral spring are small volume, strong variable stiffness and long suspension stroke, but the disadvantage is that spiral spring only has buffering effect, and additional guide devices and damping devices need to be added as suspension elements. The main characteristics of air spring are similar to those of spiral spring, but its suspension stroke is longer. The system consists of oil-gas spring and flow distribution system. Oil-gas spring takes gas as elastic element, and oil is introduced between gas and piston as intermediate medium. The flow distribution system uses the flow of oil to balance the axle load, damp vibration and adjust the height of the car body. The biggest advantage of hydro-pneumatic suspension system is that it can play the role of multi-axis balance, and can increase the lateral stiffness of the whole vehicle, overcome the braking forward tilt (especially important for vehicles with McPherson suspension), adjust the height of the frame and lock the suspension. Therefore, the off-road maneuverability and ride comfort of vehicles with hydro-pneumatic suspension system are the best, but its disadvantage is that the reliability of hydro-pneumatic spring elements depends heavily on the accuracy of manufacturing process. In addition, the fatal defect of the hydro-pneumatic spring is that any suspension terminal is destroyed, which will lead to the failure of the suspension system of the whole vehicle. Therefore, even though the Germans have the best processing technology in the world, their conservative and harsh nature makes them give up the excellent hydro-pneumatic spring suspension when designing "boxer" wheeled armored vehicles. In view of many advantages of hydro-pneumatic spring, new generation wheeled vehicles such as French VBCI, Swiss Piranha IV and Finnish AMV all adopt hydro-pneumatic spring suspension. In order to overcome the shortcomings of hydro-pneumatic spring, designers often use hydro-pneumatic hybrid suspension or install spiral spring suspension outside hydro-pneumatic spring suspension as an emergency. China PLZ89 122mm self-propelled howitzer uses the former, while most wheeled vehicles usually choose the latter. VNl wheeled infantry fighting vehicles are no exception. The suspension device of VNl wheeled infantry fighting vehicle in China has a world-class level. /Wiki/ShowContent.aspx？ TitleID=390864