Pipe chain conveyor, as a type of conveying equipment, has been widely used in many industries. The tension of the chain is crucial for the normal operation of the pipe chain conveyor. Appropriate chain tension can ensure stable operation of equipment, improve conveying efficiency, and extend equipment service life. So, how to determine if the tension of the chain is appropriate when running a pipe chain conveyor?

1、 Observe the appearance of the chain

1. Appearance of the chain under normal tension

At the appropriate tension, the chain should present a relatively straight state without obvious bending or twisting. The various links of the chain are tightly connected, with no gaps that are too large or too small. At the same time, the surface of the chain should be smooth, without obvious wear, cracks, or deformation.

2. Appearance of overly loose chains

If the tension of the chain is too loose, the chain may sag. During the operation of the chain conveyor, it is evident that there is a significant amount of slack in the chain at the sprocket, and there may even be a situation where the chain disengages from the sprocket. In addition, overly loose chains can easily cause jumping and shaking, leading to unstable conveying processes and potentially causing material scattering and equipment vibration.

3. Appearance of overly tight chains

When the tension of the chain is too tight, the chain will appear too tight and lack elasticity. The surface of the chain may show signs of excessive stretching, such as reduced gaps between chain links, narrower chain width, etc. An overly tight chain can impose a significant load on the sprocket and drive system, leading to increased wear on the sprocket and overheating of the motor.

2、 Listen to the sound of the device running

1. Sound characteristics under appropriate tension

When the tension of the chain is appropriate, the sound of the pipe chain conveyor during operation is relatively smooth and soft, without any abnormal noise or noise. You can hear a slight sound of the chain meshing with the sprocket, as well as the normal operation sound of the motor and gearbox.

2. Sound expression of loose chains

If the chain tension is too loose, it will produce significant noise during operation. The jumping and shaking of the chain will make a "click click" impact sound, especially at the meshing point between the chain and the sprocket, the sound will be more pronounced. In addition, a loose chain may cause friction between the material and the chain during transportation, resulting in a harsh scraping sound.

3. Sound expression of overly tight chains

When the chain tension is too tight, the sound of equipment operation will become dull and heavy. Due to excessive tension on the chain, the friction between the sprocket and the chain increases, resulting in a loud friction sound. At the same time, overly tight chains may also increase the load on the motor and gearbox, resulting in abnormal humming sounds from the motor or increased noise from the gearbox.

3、 Check the operating status of the drive device

1. Motor current

By observing the current of the motor, it is possible to indirectly determine whether the tension of the chain is appropriate. Under normal circumstances, the current of the motor should fluctuate within the rated range. If the chain tension is too loose, the load on the motor will decrease and the current will correspondingly decrease; If the chain tension is too tight, the load on the motor will increase and the current will rise. Therefore, the appropriate tension of the chain can be determined by monitoring the changes in motor current.

2. Gearbox temperature

The temperature of the gearbox can also reflect the tension of the chain. Under appropriate tension, the temperature of the gearbox should be within the normal range. If the tension of the chain is too tight, the load on the reducer will increase, leading to an increase in temperature; If the chain tension is too loose, the gearbox may experience idling and the temperature may also change. Therefore, regularly checking the temperature of the gearbox can help determine whether the tension of the chain is appropriate.

4、 Measure the sag of the chain

1. Measurement method

Use measuring tools such as rulers or tape measures to select a suitable position on the horizontal or vertical section of the pipe chain conveyor and measure the sag of the chain. The specific method is to place the measuring tool perpendicular to the chain and measure the distance from the low point of the chain to the measuring tool.

2. Appropriate range of sag

The appropriate range of chain sag for different models and specifications of pipe chain conveyors may vary. Generally speaking, the sag of the chain should be controlled at around 1-2% of the chain pitch. For example, if the pitch of the chain is 100 millimeters, the sag of the chain should be between 1-2 millimeters. In practical operation, the appropriate range of sag can be determined based on the device's user manual or consultation with the manufacturer.

In summary, when operating a pipe chain conveyor, the appropriate tension of the chain can be determined by observing the appearance of the chain, listening to the sound of equipment operation, checking the operating status of the drive device, and measuring the sag of the chain. Only by maintaining the appropriate tension of the chain can the stable operation of the pipe chain conveyor be ensured, the conveying efficiency be improved, and the service life of the equipment be extended.