How is belt drive efficiency calculated?

The energy transfer is evaluated by the efficiency, i.e. the ratio of output energy to that of input: η = P o u t P i n = M k o u t ⋅ φ o u t M k i n ⋅ φ i n [ % ] where is the efficiency, is the power, is the torque and is the angular velocity.

What is velocity ratio in belt drive?

The velocity ratio of the belt drive is the ratio between the velocities of the follower or driven (N2) and the driver (N1). When the thickness of the belt (t) is considered: V . R = N 2 N 1 = d 1 + t d 2 + t.

How do you calculate power transmitted?

If PR is the received signal power and PT is the transmitted power, then in free-space propagation, P R ∝ G × P T f 2 × d α , where f is the carrier frequency, d is the propagation distance, G is the power gain from the transmit and receive antennas, and α = 2.

What are the losses in belt drive?

In belt drives, power losses occur due to a combination of speed losses and torque losses [1]. Speed losses result from sliding of the belt relative to the pulley, which leads to a decrease in the angular velocity of the driven pulley, and thus in the transmitted power.

How do you calculate the frequency of a belt?

We could calculate the belt pass frequency by knowing the driven shaft speed in rpm, the pitch diameter of the driven sheave and the belt length: BPF = pi*dia*speed/BL. But, we can also measure it and be much more accurate by using a tach or a strobe. We did this for our unit and found the BPF to 577 cpm.

What is belt tension ratio?

Belt tension at steady state can be calculated as:(6.6)Tb=1.37×f×L×g×2×mi+2×mb+mm×cosδ+H×g×mmwhere Tb is the belt tension (N), f is the coefficient of friction, L is the conveyer length in meter divided by two, g is the acceleration due to gravity (9.81m/s2), mi is the load of idlers within 1m length of conveyer belt ( …

How do you calculate RPM on a belt drive?

RPM1 = 180 (driving pulley speed), d2 = Diameter of driven pulley 9 in, RPM2 = Speed of driven pulley, RPM 2 = 15 × 180 9 = 300 RPM .