The wire drive roller plays an important role in the paper machine. Its main function is to drive the wire at the end of the wire section to ensure that the paper web can be smoothly transferred from the wire section to the press section.
1. Wire drive
The main task of the mesh drive roller is to drive the mesh to ensure that the mesh can run at a predetermined speed. In actual operation, the mesh drive roller transmits power to the mesh through the transmission device connected to it, so that the mesh can continue to rotate and transport paper sheets.
2. Wire tension control
In order to ensure the stability of the mesh during operation, the mesh tension needs to be precisely controlled. In some papermaking machines, the mesh tension is detected by an electronic measuring element installed on the bearing seat on the drive side of the correction roller, and the corrector adjusts the mesh tension through an airbag 5.
3. Wire cleaning
During the operation of the mesh drive roller, in order to keep the mesh clean and prevent the accumulation of impurities that affect the quality of the paper, a spray device is usually installed on the mesh roller. These spray devices can clean the mesh roller regularly or continuously, and remove paper scraps and other debris adhering to the surface of the mesh roller by spraying water or other cleaning liquids.
4. Wire protection
In order to protect the mesh from wear and extend its service life, the design of the mesh drive roller usually takes into account the protection of the mesh. For example, the breast roll mainly supports the net and drives the net to rotate; while the vacuum roll can provide appropriate dryness when the paper leaves the net and reduce the wear of the net 5.
The key role of the drive roll in the paper machine is that it is not only responsible for driving the net, but also participates in multiple links such as the tension control, cleaning and protection of the net. It is crucial to ensure the normal operation of the paper machine and the quality of paper.
1. Wear resistance
The net drive roller needs to have good wear resistance in actual operation to reduce the wear caused by contact with the net.
2. Elasticity and hardness
The material of the net drive roller should have appropriate elasticity to ensure sufficient friction when pulling the net. At the same time, hardness is also important, which is related to the durability of the net drive roller and the friction between the net and the net.
3. Surface roughness
The roughness of the surface of the net drive roller is also a factor that cannot be ignored. Generally speaking, the lower the surface roughness, the greater the friction.
4. Control accuracy and stability
In electrical control, the net drive roller usually adopts load distribution control to ensure sufficient control accuracy and operation stability during operation. Therefore, the material of the driving mesh roller should be able to withstand a certain load and maintain good transmission performance.
Roller material: Q235A steel plate rolling
Axle head: 45# steel quenched and tempered, bearing with 1:12 cone, with hydraulic oil withdrawal hole
Roller coating: synthetic wear-resistant rubber, rubber hardness Shore A95±2°
Coating thickness: customized
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