Connecting The Shafts For Transmission Of Power: Couplings
What is it?
Coupling is a device that connects two shafts together at their ends with the purpose of transmitting power. They normally do not allow disconnection of shafts during operation, however, there is torque limiting them which can slip or disconnect when some torque limit is exceeded.
To join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both is the couplings primary purpose. By careful selection, maintenance and of installation them, substantial savings can be made in reduced maintenance costs and downtime.
What is gear coupling?
It is a mechanical device for transmitting torque between two shafts that are not collinear. It consists of a flexible joint fixed to each shaft. The two joints are connected by a third shaft, called the spindle.
Each joint consists of a 1:1 gear ratio internal/external gear pair. The tooth flanks and outer diameter of the external gear are crowned to allow for angular displacement between the two gears. Mechanically, the gears are equivalent to rotating splines with modified profiles. They are called gears because of the relatively large size of the teet have higher torque densities than universal joints designed to fit a given space while universal joints induce lower vibrations. The limit on torque density in universal joints is due to the limited cross sections of the cross and yoke. The gear teeth in a gear coupling have high backlash to allow for angular misalignment. The excess backlash can contribute to vibration.
Gear couplings are generally limited to angular misalignment, i.e., the angle of the spindle relative to the axes of the connected shafts, of 4-5°. Universal joints are capable of higher misalignment.
Single joint gear couplings are also used to connect two nominally coaxial shafts. In this application, the device is called a gear-type or flexible coupling. The single joint allows for minor misalignments such as installation errors and changes in shaft alignment due to operating conditions. These types of gear couplings are generally limited to angular misalignment of 1/4-1/2°.
It is generally observed that even with the most exacting precision in the original installation, subsequent misalignment can rarely be avoided over a period of time, foundations may settle, bearings ultimately wear and dimensions change with temperature.
The misalignment also takes place due to vibrations. These Flexible Gear couplings are available in two configurations - Full Geared and Half Geared Half Rigid.
Full Geared Coupling: Here both the halves are identical and consist of two Hubs and two outer Flanges Sleeves bolted together. This type of Coupling is capable of accommodating both Offsets as well as Angular misalignment.
Half Geared Half Rigid Coupling: Here instead of two identical halves one half is geared and the other half is rigid. There is a single Hub in this type since the other side is rigid. This type is used for taking care of only Angular misalignment.
Sahara Engineers is basically latest and modern engineering machine shop serving the industry since 1998. We can manufacture highly précised jobs as Per clients requirement. Our latest machinery and highly skilled workforce Can meet industrial requirement in all aspect.
To know more, visit www.gearcouplingsindia.com | Gear Couplings Manufacturer |
Coupling is a device that connects two shafts together at their ends with the purpose of transmitting power. They normally do not allow disconnection of shafts during operation, however, there is torque limiting them which can slip or disconnect when some torque limit is exceeded.
To join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both is the couplings primary purpose. By careful selection, maintenance and of installation them, substantial savings can be made in reduced maintenance costs and downtime.
What is gear coupling?
It is a mechanical device for transmitting torque between two shafts that are not collinear. It consists of a flexible joint fixed to each shaft. The two joints are connected by a third shaft, called the spindle.
Each joint consists of a 1:1 gear ratio internal/external gear pair. The tooth flanks and outer diameter of the external gear are crowned to allow for angular displacement between the two gears. Mechanically, the gears are equivalent to rotating splines with modified profiles. They are called gears because of the relatively large size of the teet have higher torque densities than universal joints designed to fit a given space while universal joints induce lower vibrations. The limit on torque density in universal joints is due to the limited cross sections of the cross and yoke. The gear teeth in a gear coupling have high backlash to allow for angular misalignment. The excess backlash can contribute to vibration.
Gear couplings are generally limited to angular misalignment, i.e., the angle of the spindle relative to the axes of the connected shafts, of 4-5°. Universal joints are capable of higher misalignment.
Single joint gear couplings are also used to connect two nominally coaxial shafts. In this application, the device is called a gear-type or flexible coupling. The single joint allows for minor misalignments such as installation errors and changes in shaft alignment due to operating conditions. These types of gear couplings are generally limited to angular misalignment of 1/4-1/2°.
It is generally observed that even with the most exacting precision in the original installation, subsequent misalignment can rarely be avoided over a period of time, foundations may settle, bearings ultimately wear and dimensions change with temperature.
The misalignment also takes place due to vibrations. These Flexible Gear couplings are available in two configurations - Full Geared and Half Geared Half Rigid.
Full Geared Coupling: Here both the halves are identical and consist of two Hubs and two outer Flanges Sleeves bolted together. This type of Coupling is capable of accommodating both Offsets as well as Angular misalignment.
Half Geared Half Rigid Coupling: Here instead of two identical halves one half is geared and the other half is rigid. There is a single Hub in this type since the other side is rigid. This type is used for taking care of only Angular misalignment.
Sahara Engineers is basically latest and modern engineering machine shop serving the industry since 1998. We can manufacture highly précised jobs as Per clients requirement. Our latest machinery and highly skilled workforce Can meet industrial requirement in all aspect.
To know more, visit www.gearcouplingsindia.com | Gear Couplings Manufacturer |
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