Application and elastic performance of serpentine spring coupling

The serpentine spring coupling is a metallic coupling with a structure that relies on a serpentine spring leaf to transmit torque.It has good damping performance, long service life, large load variation, and starting; high transmission efficiency, reliable operation; low noise, good lubrication; simple structure, convenient assembly and disassembly, and allow large installation deviations.Although the serpentine spring coupling has so many features and advantages, many brothers have changed it to an elastic pin coupling.As the user unit of the snake spring coupling, our company did not follow suit, but used it carefully and received good results.

1 Carefully align the installation and control reasonable deviations

Although the serpentine spring coupling allows a large installation deviation, it should also be within the specified value during installation.

1) Alignment of the gap and angular deviation between the two-part coupling.When installing, measure the gap value between the two-part coupling every 90°, and the difference between the larger value and the smaller value does not exceed 0.38mm.

2) Alignment of radial deviation.Place a ruler on the two-lobe coupling, measure it every 90°, and check with a feeler gauge. The radial deviation does not exceed 1mm.

2Select the appropriate grease

The lubricating point temperature is ≥150℃, which can resist centrifugal force, has separation stability, no impurities, and does not corrode carbon steel and nitrile rubber.

3 Fill enough grease

Adequate lubrication is very important to the work of the coupling. It is recommended to check once a year.Inject grease with a dry oil tool until excess grease overflows in the hole.

4 Control the working environment temperature of the coupling, generally within 18~80℃.

The serpentine spring coupling has many excellent properties, such as: excellent shock absorption performance, long equipment use time; and can withstand a wide range of variable loads, starting in work; and high transmission efficiency, stable working state , Reliable operation; low noise during use, strong lubricity; simple structure, convenient assembly and disassembly.There are few internal components of the equipment, so it is light in weight and small in size, which is convenient for storage and carrying; even if there is a large error in the installation process, it will not affect the performance of the equipment; the operation is simple and the structure is compact.

Serpentine spring couplings are widely used in rock crushers, metallurgy, mining, and crane equipment, etc.; the equipment is suitable for the connection of medium and high-power transmission shafts of two coaxial lines, and has a standard compensation for the two shafts. Offset, vibration reduction, and cushioning performance, the working environment temperature can be between minus 30 degrees Celsius and 150 degrees Celsius; when installing the equipment, you also need to pay attention to the control deviation, although the allowable error value is large, but in the installation It should also be ensured that it is within the specified value during the process; choosing the ideal grease can prolong the use time of the equipment.

The elasticity of the serpentine spring coupling is very good.The flexible effect of the spring can greatly reduce the vibration emitted during operation.The use time of the serpentine spring coupling is related to its production materials. For example, when selecting the material, a strong alloy steel product is used, and some processing will be performed on it to make the use effect, such as heating Disposal, this kind of treatment makes it flexible, and the serpentine spring coupling is very strong, because the spring on the coupling has undergone a rigorous sandblasting operation, so that it can compress the surface of the serpentine spring coupling. Molecular structure, these operations make it use for a long time.The structure of the coupling is simple and easy to maintain. There are few parts for the serpentine spring coupling, so it is light in weight and small in size, which makes it very convenient to install and maintain. It does not require excessive maintenance. The more important maintenance is to apply grease to the corresponding shaft when the device is used for a long time. This not only makes the operation smoother, but also eliminates some noise.

The serpentine spring coupling is divided into two types: constant stiffness and variable stiffness, which mainly depend on the following two forms of spring contact teeth: the tooth shape is straight: the distance between the serpentine spring and the tooth contact point under normal load It does not change with the deformation of the serpentine spring, and the stiffness remains unchanged. The relative rotation angle of the two halves of the JSS double-flange serpentine spring coupling has a linear relationship with the transmitted torque, which is a constant stiffness serpentine spring coupling.

The tooth profile of the serpentine spring coupling is curvilinear: when the load is small, the straight part of the serpentine spring is basically parallel to the axis to be connected; when the load increases, the deformation of the serpentine spring increases, and the arc of contact with the tooth is also Increases, and the distance between the contact point with the tooth becomes shorter and shorter. When the stiffness increases, the relative rotation angle of the two halves of the coupling is nonlinear with the transmitted torque, which is a variable-rigidity serpentine spring coupling .

The serpentine spring coupling is a metallic coupling with a structure that relies on a serpentine spring leaf to transmit torque.It has good damping performance, long service life, large load changes, and start; high transmission efficiency, reliable operation, low noise, good lubrication, simple structure, convenient assembly and disassembly, and large installation deviations are allowed.Pay attention to the following aspects in use.

　　1. Carefully align the installation and control reasonable deviations

　　Although the serpentine spring coupling allows a large installation deviation, it should also be within the specified value during installation

　　(1) Correction of the gap between the two-lobe coupling and the angular deviation. When installing, measure the gap between the two-lobe coupling every 90°, and the difference between the larger value and the smaller value does not exceed 0.38mm .

　　(2) Correction of radial deviation.Place a ruler on the two-part coupling, and measure it every 90°. Use a ruler to check that the radial deviation does not exceed 0.38mm.

　　2. Choose the right grease

　　The temperature of the oil injection point is ≥150℃, which can resist centrifugal force, has separation stability, no impurities, and does not corrode carbon steel and nitrile rubber lithium-based grease.

　　3. Fill enough lubricating grease

　　Adequate grease is very important for the work of the coupling, and it is recommended to check it once a year.Inject grease with a dry oil tool until excess grease overflows in the hole.