Influence of Eccentricity of Drive Mechanisms …
509
Amplitude (mm)
Time
Amplitude (mm)
Frequency(Hz)
Fig. 4 Variation of displacement amplitude with frequency and time in point P
2.2 Determination of Seed Separation Degrees
of First-Quality K 1 , Seeds of the Quality
of the Second-Quality K 2 , from the Initial Seed Mass,
Depending on the Eccentricity of the Drive Mechanism
The degree of separation of seeds of the first-quality k 1 is the percentage of the
first-quality seeds, calculated from the initial seed mass [5, 8, 9].
The degree of separation of seeds of the second-quality k 2 is the percentage of
the second-quality seeds, calculated from the initial seed mass [5, 8, 9].
Determinations were made for each of the five airflow speeds mentioned above.
The values of the tilt angles of the two upper block sieves, α and β, are: α = 4° and
β = 4°. The angle of inclination of the chaff cover is γ = 30° and γ = 60°.
3 Study of the New Sieve Drive Mechanism
For the eccentric slider-crank mechanism in Fig. 7 is known dimensions of the
geometric elements and the law of motion of the element leader AB and are required
trajectories, velocities and accelerations for the B, C and M of this type of mechanism.
Therefore: θ = θ(t), ω 1 = ˙
θ, ε 1 = ¨
θ, longer know OA, AB, BC, BN and NM. The
question to determining parametric equations of the points: B(x B , y B ), C(x C , y C )
509
Amplitude (mm)
Time
Amplitude (mm)
Frequency(Hz)
Fig. 4 Variation of displacement amplitude with frequency and time in point P
2.2 Determination of Seed Separation Degrees
of First-Quality K 1 , Seeds of the Quality
of the Second-Quality K 2 , from the Initial Seed Mass,
Depending on the Eccentricity of the Drive Mechanism
The degree of separation of seeds of the first-quality k 1 is the percentage of the
first-quality seeds, calculated from the initial seed mass [5, 8, 9].
The degree of separation of seeds of the second-quality k 2 is the percentage of
the second-quality seeds, calculated from the initial seed mass [5, 8, 9].
Determinations were made for each of the five airflow speeds mentioned above.
The values of the tilt angles of the two upper block sieves, α and β, are: α = 4° and
β = 4°. The angle of inclination of the chaff cover is γ = 30° and γ = 60°.
3 Study of the New Sieve Drive Mechanism
For the eccentric slider-crank mechanism in Fig. 7 is known dimensions of the
geometric elements and the law of motion of the element leader AB and are required
trajectories, velocities and accelerations for the B, C and M of this type of mechanism.
Therefore: θ = θ(t), ω 1 = ˙
θ, ε 1 = ¨
θ, longer know OA, AB, BC, BN and NM. The
question to determining parametric equations of the points: B(x B , y B ), C(x C , y C )