How do I check my sheave groove?
Sheave Groove Root Wear Wire rope will wear the bottom of the sheave groove to a radius smaller than the radius of the sheave. To determine the amount of wear, place the proper size gauge in the sheave and shine a light behind the gauge. Light should not be detected between the gauge and the root of the groove.
How do you inspect a sheave?
Sheave Inspection
- Check sheave grooves for wear.
- Check flanges for wear, chips and cracks.
- Check bearings for wobble, lubrication and ease of rotation.
- Check grooves for proper size.
What is a flange of a sheave?
The intersection of the drum and its flange represents the farthest position to which the rope can travel across the drum. There are left and right angles, measured to the left or right of the center line of the sheave, respectively.
What does fleet angle mean?
The angle between the center line through the lead sheave and the centerline of the rope leading to the drum is called the fleet angle. Experience has shown that the best wire rope service is obtained when the maximum fleet angle is not more than 1½° for smooth drums, and 2° for grooved drums.
What is a sheave pulley?
A sheave (/ʃiːv/) or pulley wheel is a grooved wheel often used for holding a belt, wire rope, or rope and incorporated into a pulley. The sheave spins on an axle or bearing inside the frame of the pulley. This allows the wire or rope to move freely, minimizing friction and wear on the cable.
What is a groove in a pulley?
A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain. Pulleys are assembled to form a block and tackle in order to provide mechanical advantage to apply large forces.
How is sheave diameter measured?
Use a String to Measure the Inside Diameter The outside diameter (abbreviated as OD) is the distance across the whole disc of the sheave– this can be easily measured by placing a ruler on the side of the sheave and simply measuring the diameter.
What is Groove Gauge?
Professional, fast and uncomplicated measuring of grooves of your ropes drives. Groove gauges are measuring aids and are therefore not subject to the measuring equipment inspection obligation.
What is the function of a sheave wheel?
What is fleet angle in winding?
The fleet angle is defined as the largest angle of the rope between the first sheave and the drum flange, relative to the centre line of the drum. With all types of drum, the rope is subject to a fleet angle which directly influences its behaviour and impacts on its service life.
What is the ratio of the fleet angle of a smooth drum?
1 1/2º
For optimum efficiency and service characteristics, the angle here should not exceed 1 1/2º for a smooth drum, or 2º for a grooved drum. Fleet angles larger than these suggested limits can cause such problems as bad winding on smooth drums, and the rope rubbing against the flanges of the sheave grooves.
What type of deterioration is used in ropes?
All steel wire ropes deteriorate over time. Three of the causes of the deterioration are abrasion, corrosion and broken wires. Abrasion: Can either be external, and it would be caused by rubbing, or internal, and it would be caused by inter-strand nicking.
What to look for in a Lebus grooving?
Inspect the flanges for wear, chips, cracks and bending. Inspect the Lebus grooving (if so equipped), visor and kicker plates for wear. Also look for rope imprinting damage. Examine the sheave grooves for wear and proper diameter. To check the size, contour and amount of wear, use a sheave gage.
What did Lebus notice about a drilling rig?
The common element in each case was the hoisting machinery, specifically the drum and wire rope, which was the main “workhorse” of the drilling rig. LeBus noticed that the wire rope would not lay in a consistent pattern on the drum. This caused undue wear and scrubbing of the wire rope.
Why did Lebus stop using wire rope on drum?
LeBus noticed that the wire rope would not lay in a consistent pattern on the drum. This caused undue wear and scrubbing of the wire rope. Something better was on the horizon. Q: What spooling angle is required for the HELICAL groove?
What kind of fishing tools did Lebus make?
Soon LeBus was into the manufacturing and selling of fishing tools, drill collars, tool joints and rotary bits. LeBus manufactured the “Eureka Pipe Wrench” and the “Slip Socket Overshot”. The common element in each case was the hoisting machinery, specifically the drum and wire rope, which was the main “workhorse” of the drilling rig.
