7. If the synchronous belt is not placed for a long time, the rubber inside the synchronous belt will age and shorten the service life of the synchronous belt.
2. Causes and precautions of synchronous belt heating
In order to ensure the transmission performance of the synchronous belt and extend its service life, special attention should be paid to the following issues during use and maintenance:
1. Correct selection
Common synchronous belts have arc teeth, trapezoidal teeth, T-shaped teeth and other models. When replacing, it must be ensured that the wheel groove model of the synchronous belt or synchronous pulley used originally is consistent. When replacing, it should be noted that the actual length of the synchronous belt is the same as the original one, so that it is easy to adjust the tensioner. Otherwise, the tensioning force is too large or too small, the wear is aggravated; it is easy to heat up.
2. Correct loading and unloading
When loading and unloading, the tensioner fixing bolts should be loosened first, or the tensioning bolts and nuts of the continuously variable speed wheel should be loosened, and they should not be pried down or forced up.
3. Correct installation
When installing the synchronous pulley, the symmetrical center planes of the wheel grooves of the master and slave synchronous pulleys of the same circuit should be in the same plane, and the position deviation should not be greater than ±3% of the center distance (generally, the allowable deviation of the short center distance is 2-3 mm, and the allowable deviation of the long center distance is 3% mm). Otherwise, distortion will occur in the wheel groove, causing early wear on the side and reducing the service life.
4. Do not use worn synchronous pulleys
When the rim of the synchronous pulley is worn or deformed, the synchronous belt causes scraping and extrusion, increasing harmful friction, accelerating the wear rate and reducing the service life. When the synchronous pulley is worn and deformed, it should be repaired or replaced in time.
5. Maintain the appropriate tension of the synchronous belt
When working, too tight will cause heat and easy loss of elasticity; too loose will cause slipping in the pulley, resulting in increased wear; too tight or too loose will shorten the service life. Therefore, the tension of the synchronous belt should be checked frequently and adjusted in time.
6. The operating temperature should not be too high
When the synchronous pulley rotates, friction generates heat, making the surface temperature reach 50-60 degrees, and the hand can touch it for a long time. The operating temperature should not be too high. Too high temperature will cause premature aging, resulting in reduced strength and elasticity. Overtightening and improper assembly are the main reasons for excessive temperature, which should be checked and adjusted in time.
7. The swing during operation should not be too large
If the swing is too large during operation, the friction between the synchronous belt and the synchronous pulley will be reduced. In addition to being too loose, the main reasons for the swing are too large bearing clearance of the synchronous pulley, loose bearing seat and resonance caused by low-speed operation. During maintenance, the bearing clearance should be carefully checked and replaced in time; the tightness of the bearing seat should be checked and adjusted regularly; in addition, long-term low-speed operation should be avoided to prevent resonance.
8. Avoid oil stains
During maintenance, lubricating oil and other oil stains should be prevented from getting on the surface, because various oil stains have a corrosive effect, premature aging, and reduced service life; when stained with oil stains, they should be cleaned with soap in time.
III. Summary
1. Improper material selection:
The materials of synchronous belts and synchronous pulleys should be selected according to the operating speed of the machine equipment. If the selected materials and workmanship requirements do not meet the requirements of the equipment, the synchronous belts and synchronous pulleys may not keep up with the speed of the machine, resulting in severe heating and wear.
2. Model selection does not match:
The selection of synchronous belt and synchronous pulley models should be confirmed according to the equipment speed, power, etc. If the model is not selected correctly, it may cause insufficient torque and cannot bear the load of the machine, and various problems may occur after long-term use.
3. Dynamic balance problem:
There is a jumping phenomenon when the synchronous belt and synchronous pulley rotate, which is usually due to the lack of dynamic balancing. Dynamic balancing has a great impact on the service life of synchronous belts and synchronous pulleys. If dynamic balancing is done, it can ensure accurate transmission without slippage.
4. Overload operation:
The capacity of industrial synchronous belts and synchronous pulleys to carry goods varies depending on the model. Synchronous belts and synchronous pulleys cannot work under overload conditions, otherwise the machine will be overloaded and generate heat, which will cause damage to itself.
5. Failure to maintain in time:
Industrial synchronous belts and synchronous pulleys, as an industrial machine, require regular maintenance to extend their service life and reduce losses. Failure to maintain in time may lead to minor faults that cause them to heat up.
In addition, motor overheating may also be caused by synchronous belts and synchronous pulleys. The specific reasons include unsuitable motors, too firm packing glands, too tight mechanical seal springs, poor assembly quality of equipment, and poor connection between synchronous pulleys and shafts.
Jiangsu Bailite Transmission Technology Co., Ltd
