Table of Contents
What is an elastomeric coupling?
Elastomeric couplings are essentially a coupling made from a flexible elastic material that transmits torque. This specific type of coupling is designed to allow the elastic to wear out before the actual metal components wear out.
What is an omega coupling?
Rexnord Omega Couplings are non-lubricated, material-flexing couplings utilizing a specially formulated polyurethane material engineered for maximum durability, strength and fatigue resistance . Omega couplings can operate in horizontal or vertical applications without additional components .
What is high speed coupling?
SFM couplings are designed for high-speed power transmission applications up to 24,000 rpm where high torque and precision alignment is critical. Available in 10 sizes, SFM couplings transmit torque by connecting two shafts while damping system vibrations and accommodating misalignment.
What are the three types of compression flexible couplings?
Types Of Flexible Couplings These fall into three different types, namely compression, shear, or a combination of both.
What types of misalignments can an elastomeric shear tire coupling accommodate?
To be considered flexible, a coupling must handle parallel and angular misalignment. Couplings with four-way flexibility accommodate both end float and torsional movement.
What is a high speed shaft?
high speed shaft. The shaft which drives the generator. Explanation: The wind-driven rotor is on a low-speed shaft which is connected by cears to the high-speed shaft, which drives the generator.
How does an Oldham coupling work?
Oldham couplings transmit torque by mating the slots on the center disk to the drive tenons on the hubs. They accommodate angular and axial misalignment, and are especially useful in applications where parallel misalignment is present.
What type of coupling would allow the greatest flexibility?
Metallic membrane couplings
Metallic membrane couplings produce relatively low moments and forces which are relatively independent of torque. The most commonly used flexible couplings today are those that produce the greatest flexibility (misalignment and axial capacity) while producing the lowest external loads on equipment.
Which of the following coupling types work with high torque and high speed?
Diaphragm coupling allows angular, axial, or parallel misalignment. This coupling is used where high torque and high speed required.
What is one of the advantages of elastomer couplings over flexible metal couplings?
Elastomeric couplings also have good vibration dampening and shock absorbing qualities and allow for more misalignment than most metallic couplings. The couplings are, however, sensitive to chemicals and high temperatures and are usually not torsionally stiff enough for positive displacement.
What is the difference between a rigid and a flexible coupling?
Rigid couplings provide a rigid connection; the two shafts are firmly connected, and the coupling allows for a smooth transmission of torque throughout the system. Flexible couplings create flexible connections, and the components can lose some of the torque power through the interaction.
How is RPM shaft calculated?
For a 60 Hz system with four poles, the calculations to determine RPM would be:
- (Hz x 60 x 2) / number of poles = no-load RPM.
- (60 x 60 x 2) / 4.
- 7,200 / 4 = 1,800 RPM.
What does a low speed shaft do?
In most large-scale turbines, the low speed shaft is connected to a gearbox. The gearbox increases the rotational speed of the shaft, up to 1200-1800 rpm. This is the required rotational speed of most generators to produce acceptable levels of power.
What are the advantages of Oldham coupling?
Oldham coupling applications: It can accomodate slightest misalignments. The driving shafts and the driven shafts generate at a similar speed. It behaves as an electrical insulator. It can transmit power and torque.
Where are Oldham couplings used?
Oldham couplings are three-piece flexible shaft couplings that are used to connect driving and driven shafts in mechanical power transmission assemblies. Flexible shaft couplings are used to counter parallel misalignment that occurs between connected shafts and, in some cases, to absorb shock.
What is the difference between elastomeric and gear couplings?
While elastomeric couplings are commonly used for numerous general industrial pump applications running up to 115 horsepower (hp)/100 revolutions per minute (rpm), elastomeric material limits are surpassed in applications that need transmission of higher torques and speeds. Gear couplings are excellent performers in higher torque applications.
What is a jaw type elastomeric coupling?
The Jaw-type elastomeric coupling is an economical, proven solution for general purpose applications. Jaw couplings are easy to install and require no lubrication or maintenance. Four different flexible insert types are available: Buna-N rubber, Urethane, Hytrel™ and Bronze.
What type of coupling is best for high torque applications?
IMAGE 2: Rigid gear couplings are ideal for high torque applications. IMAGE 3: Grid couplings incorporate a steel grid spring that operates in compression. Disc couplings can rotate at high speeds, making them a good choice for pumps operating at a high rpm.
What is Omega spacer elastomeric coupling?
Omega Spacer elastomeric coupling consists of the unique split-in-half flex element and reversible hubs. Available in Inch (Imperial) or Metric. Hubs offered in rough, custom, or bushed designs. Accommodates shaft diameters up to 6.00” (152 mm) Continuous torque loads up to 39,500 lb-in (4,463 Nm)