What is the pitch line velocity?
Pitch line velocity is measured at the pitch line of the gear, which is midway along the length of the gear teeth. For circular gears, the pitch line is more correctly referred to as the pitch circle, which is an imaginary circle that rolls without slipping when aligned with the pitch circle of the mating gear.
How do you find the velocity of a pitch line?
Pitch line velocity is a function of the gear’s pitch diameter and its rotational speed: Where PLV = pitch line velocity (m/sec); d p = pitch diameter (m); ω = rotational speed (rpm) Pitch line velocity is important for gear design and selection for several reasons.
Is pitch line velocity same for gear and pinion?
Pitch line velocity is the linear speed of a point on the pitch diameter of a gear. For a meshed set of gears, the pinion and the gear operate at the same pitch line velocity.
What is a pitch line?
1 : the line on which the pitch of gear teeth or sprocket teeth is measured and which consists of an ideal line in a toothed gear or rack which bears such a relation to a corresponding line in another gear with which it works that the two lines will have a common velocity (as in rolling contact)
What is gear velocity factor?
The ratio of the static load at the failure to the dynamic load at failure was taken as the Velocity factor (Kv). This means that an identical gear pair running at this speed would have a dynamic load equal to Kv times the static tangential load.
How do you calculate gear velocity?
Gear Velocity Ratios Velocity ratios are calculated by dividing the driver gear by the driven gear. The driver gear or pulley is the one connected to the power – e.g. the pedals on a bicycle or the motor. To calculate the speed of the driven gear – multiply the speed of the driver gear by the velocity ratio.
What is the pitch line of stairs?
Stair pitch is another word for the stair slope. Like the slope caluclation, the staircase pitch equals the rise divided by the run. Alternating tread stairs have a staggered step design to increase the tread length for each individual step.
How do you write a short pitch about yourself on a resume?
Positive words to describe yourself
- I am able to handle multiple tasks on a daily basis.
- I use a creative approach to problem solve.
- I am a dependable person who is great at time management.
- I am always energetic and eager to learn new skills.
- I have experience working as part of a team and individually.
What is pitch line velocity and how is it calculated?
Pitch line velocity is a function of the gear’s pitch diameter and its rotational speed: Where: PLV = pitch line velocity (m/s) dp = pitch diameter (m) ω = rotational speed (rpm) Pitch line velocity is important for gear design and selection for several reasons.
Why is pitch line velocity important in gearbox sizing?
In gearbox sizing, it’s important to determine the required input speed in rpm and ensure that it doesn’t exceed the gearbox’s maximum speed capability. But the linear velocity of the gear teeth, known as pitch line velocity, also plays a significant role in gearbox performance.
What is the difference between high and low pitch line velocities?
High pitch line velocities are usually accompanied by light loads and short contact times, making low-viscosity oils suitable. However, low pitch line velocities are associated with high loads and long contact times, which make high-viscosity, or even EP-rated, oils necessary.
How do you find the allowable stress for pitch line velocity?
The pitch line velocity is V = dpπn1/ 12 = 1.875π (1500)/12 = 736.31 ft/min. Because the pitch line velocity is less than 2000 ft/min, the allowable stress will be σ = 20,000 ( 600 600 + 736.31) = 8979.95 psi.