WHAT IS COUPLING?

Kaplin üretimi
Tarafından gönderildi: admin Yorumlar: 0 0 Posta tarihi: 25 Haziran 2020

WHAT IS COUPLING?

Today, in a technological competitive environment, manufacturers can only increase their quality as they specialize in their own fields, and they can renew their business volumes as they do in-depth research on that subject. For this reason, engine manufacturers only produce engines, pump manufacturers only pumps, compressor manufacturers manufacture compressors; The coupling is needed to connect the electric motor manufactured in a specialist firm to a pump manufactured in another specialist firm. Of course, this coupling manufacturer is also expected to be an expert.

The coupling is the element of transferring the rotational movement and thus the moment produced in a power source to another system (machine, pump, reducer, conveyor etc.). A coupling that performs this task is also:

1-It should not cause malfunction due to power loss or unbalance.
2-It should not pass the vibrations and knocks that may occur in the system to the engine behind.
3-When the system malfunctions due to jamming or breakage, it should break and act as an insurance to protect the engine.
4-As long as the system operates normally, it should be dimensioned, designed and manufactured from suitable materials without breaking for many years and requiring minimum maintenance.

WHERE TO USE

AXIAL FREQUENCY

ANGLE FREQUENCY

HORIZONTAL LEAKAGE

HOW TO MAKE COUPLING SELECTION?

1-Coupling Size Selection

The torsional moment produced by a motor or a motor-driven gear unit is calculated by the formula:

Torsional moment = (Motor Power / Rotation speed of the shaft where coupling is needed) x 9550

In this formula, 9550 is a fixed number

Engine power taken in kilowatts

The rotation speed of the spindle is the number of revolutions per minute

The unit of the torsional moment is obtained in nM (Newton meters).

Coupling is needed not only at the motor output, but sometimes at the reducer output, at this point, the motor power and the speed after being reduced several times should be formulated in the calculation of the torsional moment produced.

The coupling to be selected should be able to meet a torsion moment higher than the torsion moment found in the formula above, because when the coupling is running, the system stops and lifts too much or the environment is too hot or the system’s excessive pulsation shortens the life of the coupling. Multiplied by the moment, it reveals the TORQ that the coupling must bear.

TORQ = Torsional moment x A x B x C

The working coefficients given in the formula with the letters A, B, C are given numerically as a result of the experiences and the user can find TORK by choosing the appropriate number for the environment and working conditions.

TORQ values ​​that can be carried by the couplings we manufacture in our company are tested in accordance with DIN 740 norm and stated in the dimension tables. The user will be able to easily select the coupling based on the TORK value above the TORK value he finds while selecting the coupling he needs. When making this selection, he should also make sure that the motor or reducer shaft is smaller than the maximum shaft diameter given in the table as d (max).

Today, in a technological competitive environment, manufacturers can only increase their quality as they specialize in their own fields, and they can renew their business volumes as they do in-depth research on that subject. For this reason, engine manufacturers only produce engines, pump manufacturers only pumps, compressor manufacturers manufacture compressors; The coupling is needed to connect the electric motor manufactured in a specialist firm to a pump manufactured in another specialist firm. Of course, this coupling manufacturer is also expected to be an expert.

The coupling is the element of transferring the rotational movement and thus the moment produced in a power source to another system (machine, pump, reducer, conveyor etc.). A coupling that performs this task is also:

1-It should not cause malfunction due to power loss or unbalance.
2-It should not pass the vibrations and knocks that may occur in the system to the engine behind.
3-When the system malfunctions due to jamming or breakage, it should break and act as an insurance to protect the engine.
4-As long as the system operates normally, it should be dimensioned, designed and manufactured from suitable materials without breaking for many years and requiring minimum maintenance.

WHERE TO USE

AXIAL FREQUENCY

ANGLE FREQUENCY

HORIZONTAL LEAKAGE

HOW TO MAKE COUPLING SELECTION?

1-Coupling Size Selection

The torsional moment produced by a motor or a motor-driven gear unit is calculated by the formula:

Torsional moment = (Motor Power / Rotation speed of the shaft where coupling is needed) x 9550

In this formula, 9550 is a fixed number

Engine power taken in kilowatts

The rotation speed of the spindle is the number of revolutions per minute

The unit of the torsional moment is obtained in nM (Newton meters).

Coupling is needed not only at the motor output, but sometimes at the reducer output, at this point, the motor power and the speed after being reduced several times should be formulated in the calculation of the torsional moment produced.

The coupling to be selected should be able to meet a torsion moment higher than the torsion moment found in the formula above, because when the coupling is running, the system stops and lifts too much or the environment is too hot or the system’s excessive pulsation shortens the life of the coupling. Multiplied by the moment, it reveals the TORQ that the coupling must bear.

TORQ = Torsional moment x A x B x C

The working coefficients given in the formula with the letters A, B, C are given numerically as a result of the experiences and the user can find TORK by choosing the appropriate number for the environment and working conditions.

TORQ values ​​that can be carried by the couplings we manufacture in our company are tested in accordance with DIN 740 norm and stated in the dimension tables. The user will be able to easily select the coupling based on the TORK value above the TORK value he finds while selecting the coupling he needs. When making this selection, he should also make sure that the motor or reducer shaft is smaller than the maximum shaft diameter given in the table as d (max).

2-Coupling Type Selection
A Type Coupling
Since the elastic parts are narrow, it provides the possibility of mounting the large diameter shaft with the small coupling diameter. Since it is manufactured from three parts, the coupling provides the opportunity to replace the elastic parts without removing the shaft from which it is mounted. when the parts are broken, the metal runs to metal and the feet are broken.
Type B Coupling
It is a type of two parts of type A. It is suitable as a price, the hub to which the shaft is connected is large and it is suitable to be used where the distance between the shafts is very narrow, but to change the elastic parts one side must be completely removed.
H Type Coupling
It is a type B type of spacer with different sizes. It can be used with spacers of different sizes optionally in the places where long distances between shafts. Elastic parts should be replaced periodically before the coupling is broken.
Star Type Elastic Coupling
It is one of the most powerful coupling types. Since the elastic part can be observed from the outside, it can be intervened immediately in case of deterioration. It is used safely in systems with excessive vibrations due to its large cross-section elastic parts. Visual control is sufficient to prevent degradation. Since the coupling feet are completely processed, it works without gap and works very smoothly.
Claw Type Elastic Coupling
It is a perfect system fuse. Even if the tires are torn during overloading, it does not damage the coupling. When the system stops, the tires continue to be replaced and they are not suitable for transferring high torques.
Pernolu Type Elastic Coupling
It is a very strong type of coupling. The abrasion of the elastic parts can be observed from the outside and the defective elastic parts can be replaced by removing the coupling without disassembling. It enables the use of small diameter couplings on a large and very close shaft.
Gear Type Coupling
It is the constant favorite coupling of hydraulic pumps. It provides great assembly convenience thanks to its tight teeth. It is not suitable for vibration because the plastic sleeve is rigid and transmits the vibration to the motor.
ME Type Elastic Coupling
Flanged type couplings specially designed for generators. The flange, which is connected to the forehead of the large diameter shaft with bolts, is able to transfer excellent torque in a narrow working environment.
E Type Elastic Coupling
ME Type is the flanged form of the coupling. In terms of structure and use, it is very similar to the Type B Elastic Coupling, the biggest difference is in the elastic spacer. Thanks to its solid spacer and strong body, it transfers large torsional strengths.
I Type Elastic Coupling
It is a type of coupling that provides perfect solution thanks to cooling holes and large cross-section elastic spacers in case the Me Type is insufficient in generators that require very high torsional moment.
3 – Selection of Elastic Spacers
Normaleks = Normalex is produced from normal rubber with a hardness of 75 ShA, it has excellent elasticity and its permanent deformation is very low. Vibration damping ability is very high.
Nitroleks = Nitrolex is produced from artificial rubber with a hardness of 75 ShA and can be used in environments that are in contact with oil and fuel oil. It requires controlled use as its elasticity is not very good.
Pivileks = Pivilex is produced from polyvinyl thermoplastic hardness of 80 ShA and it is our product which is resistant to chemicals, has good elasticity, but has high abrasion, tear and compressive strength, and is therefore used in small type couplings.
Polileks = Polilex is produced from 90 ShA hardness thermoplastic polyurethane, it is a material that is resistant to chemicals and atmospheric conditions, does not deteriorate in very large torques and has high abrasion resistance. Although its elasticity is lower than Normaleks, it is more durable.

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