IMPROVING THE EFFICIENCY OF HAMMER CRUSHER WITH VERTICAL SHAFT WHEN CRUSHING GRAIN COMPONENTS
Improving the efficiency of the grinding process in a hammer mill with a vertical shaft may be achieved through the use of a booster disk above the rotor. Additional acceleration of particles with a subsequent strike will allow the pre-destruction of the material to begin. However, for directional movement of particles and further close to a frontal impact of particles with the highest speed is possible only with directional movement using blades. Known variants of the arrangement of the blades show that it is possible to achieve the required direction of motion in combination with high productivity with the blades bent backwards. Considering the scheme of forces acting on the particle, when moving along a disk with blades, taking into account the moving and stationary coordinate system, we obtain the system of equations for relative motion of the particle. Using the initial conditions, we find the integration constants. Solving the system of equations, we find the equation of the balance of forces acting on the particle. Knowing the pressure forces of the blade on the weevil and the values of the portable and relative velocities, we can find the value of the full velocity of the weevil at the moment of detachment from the disk surface when it leaves the blade. The curvature of the blade determines the value of the relative velocity and the value of the initial angle that specifies the trajectory of movement of the weevil. The presented theoretical dependences allow determining the numerical values of the velocity and angle of flight of the particle which will affect the distance to the deck and the position of the shock plane with respect to the flying weevil. The main influence on the absolute velocity of a particle when it leaves the disc is exerted by the angular velocity and its radius.