Received 27 February 2017 SELECTION OF THE CONSTRUCTION TYPE AND DETERMINATION OF PARAMETERS AND CHARACTERISTICS OF THE SHOCK ABSORBER WITH RECUPERATIVE EFFECT

The article analyzes the operating conditions of the damping device used on a mass-produced truck moving at different speeds along various road surfaces (smooth asphalt, flat cobblestone). The main feature of trucks shock absorbers operation is the work in the low speed zone up to 0.2 m/s of rod movement with periodic splashes of speeds up to 1 m/s and higher. The article states that this distinctive feature does not allow to fully use the shock absorber design with a recuperative effect of a linear electric machine. The expediency of using a rotating generator that allows to develop values of peak useful power up to 1200-1300 W is noted. In this case, there is the problem of converting the translatory motion of the rod into rotational motion of an electric machine rotor. The article stresses that the most suitable for this is the ball-screw transmission, which has the ability to work under dynamic load conditions inherent in the elements of the truck suspension. The application of the stringent mass-dimensional requirements to shock absorbers characteristics, namely, the compliance of their parameters with the currently used structures, does not allow to create a device that would repeat the damping characteristics of the existing hydraulic ones. This problem can be solved by changing the overall device dimensions and increasing its recuperative properties or by using a hybrid electro-hydraulic design. The article presents a sketch of a shock absorber with recuperative effect, which explains the principle of constructing a shock absorber with a synchronous generator possessing permanent magnets based on a ball-screw transmission to use it in trucks suspension systems.

shock absorber based on a linear electric machine, shock absorber based on a rotating machine, shock absorber with recuperative effect, ball-screw transmission, synchronous generator with permanent magnets

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