What is brake drum coupling?
The brake drum coupling is used to connect the motor and gearbox shaft or gearbox and machine shaft. The brake is fitted on the brake drum. Thus it serves dual purpose of being a coupling and brake drum. It is Pin-bush type and has two parts : the brake drum and flange.
What is the advantage of gear coupling?
Gear couplings offer several advantages over other couplings, including moderate misalignment capacity, exceptional torsional stiffness and very high torque density.
What is full gear coupling?
A full gear coupling has a toothed hub which is fixed in both driver and driven shaft, and sleeves which has internal teeth meshing with the hub. Below is the cut section of a full gear coupling, this will make you understand better.
How do you choose a gear coupling?
Design considerations
- Torque rating. One of the key factors in selecting a coupling is its torque rating — the amount of torque that it can transmit.
- Service factor.
- Outside diameter.
- Weight.
- Moment of inertia.
- Torsional deflection.
- Torsional stiffness.
- Backlash.
How does a thruster brake work?
Thruster brakes are fail-safe brakes that are spring applied and use an electrohydraulic thruster to hold the brake open. When supplied power, the thruster piston rod extends and the brake is released. If the thruster is turned off or power is lost, the piston rod retracts and the spring engages the brake.
Where are gear couplings used?
Gear couplings are commonly employed on large, industrial machines such as pumps, blowers, compressors, mixers, etc. They can be used in smaller motion control systems, mostly with a polymer sleeve as a means of reducing backlash but other zero-backlash coupling designs are usually better suited to these applications.
How many types of gear couplings are there?
Gear couplings customarily come in two varieties, flanged sleeve and continuous sleeve. Flanged gear couplings comprise of short sleeves encompassed by a perpendicular flange.
How do I know my gear coupling size?
Step 1: Obtain required factor from Service Factor Tables Step 2: Determine the application kW per 100 RPM: kW per 100 RPM = Motor kW x 100 x Service Factor Coupling RPM Step 3: From Rating Tables, find a rating equal to or greater than the kW/100 RPM Note coupling size from left hand column.
What are thrusters used for?
Thrusters help improve coordination, muscular endurance, and balance. They help you gain both upper and lower body strength by working the quadriceps, glutes, and shoulders. Thrusters can also help you develop a strong core.
How does a hoist load brake work?
The basic principle of a crane hoist’s mechanical load brake is the mechanical conversion (into heat, through friction) of the kinetic energy produced by the descent of the load. Heat is dissipated from the friction surfaces to the oil in the gear case and then to the atmosphere.
Are gear couplings flexible?
Though one may not think of gears as being flexible, gear couplings are very much considered to be a flexible coupling. A gear coupling is a mechanical device designed to transmit torque between two shafts that are not collinear. The coupling typically consists of two flexible joints, one fixed to each shaft.
What is a coupling size?
For the female part of the coupling, (also known as the coupler) the size is obtained by measuring the diameter of the open end, or inside diameter (ID). For the male part of the coupling (adapter), the size is obtained by measuring the diameter of the adapter end, or outside diameter (OD).
Which oil is used in thruster brake?
Transformer Oil
Consists of Electro Hydraulic Thruster, Torque Spring and Liner riveted to Brake Shoes. Works on 415 V AC, 3 Phase, 50 Hz supply. Requires Transformer Oil to be filled in the thruster cylinder. Function is to bring to stop, moving / rotating machinery like motor / gearbox.
Why should the brakes be off when using a hoist?
For mobile hoists, it’s important to remember that when the hoist is in use, the brakes must be off. The hoist will find its own centre of gravity. If the brakes are on, the service user will potentially be pulled in an uncomfortable position towards the hoist.
What is a hoist brake?
Hoist brakes are an essential safety feature of overhead cranes. Designed to hold a load when the hoist motor is not running, these brakes reduce the risk of falling loads that could result in injury and property damage.
How do I know what size my gear coupling is?
Calculating The Inside Diameter With A Digital Caliper
- Place the inside tips of the caliper on the inside of the bowl (coupling)
- Expand the tips of the caliper until they’re fully extended to the bowl size.
- This will give you the correct size of the bowl needed.
- 1.75 is equivalent to a 1 3/4 size bowl.