How does a variable pitch sheave work?
The principle of a variable pitch sheave is that the threaded angular faced discs forming the V-shaped groove, in which the belt rides, are movable. When the discs are moved toward each other, the belt rides higher in the groove and the pitch diameter of the sheave is larger, which increases the driven speed.
How does a variable pulley work?
The variable speed pulley is mounted on a sliding plate, which moves the pulley toward the engine or toward the transmission. As the pulley moves toward the engine, the transmission belt gets tighter. This forces the sliding plate in the variable pulley to squeeze the engine belt.
What is the difference between VL and VP sheaves?
VL and VM single groove sheaves, pitch diameter range 1.6- 4.7”, for light duty applications up to 5HP. VP single and double groove sheaves, pitch diameter range 3.4 – 7.0”, designed for heavier duty service up to 25 HP.
How does a variable speed work?
Variable speed compressors work by using an inverter to speed up or slow down the motor according to heating or cooling load. Instead of all the power going directly into a traditional AC compressor (which runs at a fixed speed), the inverter provides the compressor with a specific voltage, essentially saving energy.
What is the main use of a kiss idler?
The use of a kiss idler can help provide control of belt vibration and whip on drives subject to shock and pulsating loads.
What is variable drive pulley?
Variable Speed Pulley Drives converts any standard constant speed motor to a Variable speed, that delivers infinite speed control for any desired speed within the speed range, instantly, accurately, smoothly and while the machine is in operation.
How do I adjust the fan speed on my adjustable pulley?
Adjusting the Blower Speed To increase blower speed, slightly loosen the setscrew that holds the pulley to the driveshaft. Move or turn the pulley clockwise on the shaft one turn, then tighten setscrew. If more speed is desired, turn the pulley clockwise two turns.
How do variable speed fans work?
Unlike conventional fan motors, a variable speed blower motor runs at different speeds to precisely control the flow of heated or cooled air throughout your home. It varies the amount of circulated air, compensating for factors like dirty filters or blocked vents by increasing the fan speed.
Are all ECM motors variable speed?
In other HVAC units, an ECM can run at variable speeds but depends on a controller that pre-programs speed, including the rate at which the motor ramps up. Typically, PSC motors start and almost immediately run at full capacity, while an ECM can start slowly and stop slowly, which helps reduce humidity in a room.
What is a kiss idler?
Contact idlers aka Kiss idlers. Spring loaded movable motor or idler to maintain belt tension. Automatic take up. What is used to transmit power from a horizontal shaft to a vertical shaft.
What is the purpose of a kiss idler in a belt drive?
Why are the keys on edge in a variable speed sheave?
D1–2 We rotated the keys 45° in our ALL-PRO variable speed sheave, placing them on edge rather than flat to provide a larger shear area for transmitting torque. Thus we eliminated another cause of sheave failure. Then we went further.
How are pitch diameter and speed maintained under varying torque loads?
Thus, constant pitch diameter and constant speed are maintained under varying torque loads. Heavy thrust springs are not constantly squeezing the flanges against the belt and cam pressure is exerted only when the load requires it, greatly prolonging belt life.
How does the D1-8 wood MCs sheaves work?
D1–8 Wood’s MCS sheaves incorporate a proven lubrication system that eliminates fretting corrosion, freezing, and sticking. Wood’s exclusive cam followers exert side wall pressure on the belt in proportion to the torque required to carry the load.