The drum dryer is a common equipment for drying materials. Because of its reliable operation, flexible operation, strong adaptability and high processing capacity, this equipment is widely used in chemical, metallurgical building materials, light industry and other departments. The drum dryer is mainly composed of a cylinder body, a supporting device, a moving device and a terminal sealing device.
The transmission device of the drum dryer has a part of the feeding and discharging device and the sealing device such as a motor, a reducer, a gear and a ring gear.
The cylinder is the base of the drum dryer, in which heat transfer and mass transfer processes are carried out, and the material is moved and transported. The supporting device of the cylinder is composed of a rolling ring, a supporting wheel and a retaining wheel. The weight of the whole cylinder is transmitted to the supporting roller through the rolling ring, and the rolling ring rolls on the supporting roller, and the retaining wheel acts to block the axial movement of the cylindrical body.
According to the working principle and structural characteristics of the drum dryer and the experience of maintaining the drum dryer in production, it is necessary to adjust the roller to ensure the long-term safe operation of the mechanical equipment of the drum dryer.
Maintain the linearity of the axis of the drum dryer; enable the cylinder to reciprocate normally along the axial direction, so that the retaining wheel remains stationary or does not move for a short period of time, so that the retaining wheels and the supporting rollers are evenly distributed. Bear the cylinder load.
The adjustment method of the axial turbulence adjustment of the drum dryer roller during the maintenance process:
1 Check whether the relative position of the wheel and the roller is still in the middle position; the force and rotation of the wheel 2 adjust the roller to adjust the center line of the roller according to the direction of rotation of the cylinder, and take the same direction in one direction. The supporting wheel forms a slight declination with the center line of the cylinder (generally no more than 0.5°, so as to prevent the supporting wheel from being shaped into a different shape) to generate a spiral upward thrust, so that it is basically balanced with the upper and lower jaws of the cylinder, so that the simplified body is relatively stable. The position is running, that is, the belt is free to reciprocate between the upper and lower retaining wheels.
The adjustment steps are as follows: When the simplified body moves downward, tighten the adjusting bolt 2 one turn, and the screw is fully retracted by one turn (note that the number of tightening turns must be equal to the number of loose turns), the simplified body will stop moving downward; if the reverse is reversed; When moving up, add liquid lubricant to the roller. At this point, the simplified body will stop moving up. If it is still moving up, tighten the bolt 1, loosen the bolt 2, and stop moving upwards. If it moves backwards, then The lubricated sleeves on the roller should be removed and, if necessary, the above method repeated until it does not move. During the adjustment process, the support roller is prevented from being skewed in different directions.
In the adjustment process, in order to move the cylinder up, Zui is better to cast some lubricating oil on the surface of the roller to increase the surface friction; otherwise, if the cylinder is to slide down, it can pour some thick grease to reduce the surface friction. . To adjust the roller, adjust the four rollers at the same time, and ensure that the wheel and the roller are not less than 50% of the contact surface.
The effect of the use of the roller adjustment greatly reduces the force on the retaining wheel, thereby improving the bearing life of the supporting and retaining wheel bearings, reducing the production cost and improving the production efficiency. At the same time, the profiled wear of the roller and the belt (rolling ring) is reduced, and the service life of the device is improved. For example, our compound fertilizer dryer has been running continuously for 4 years and has not been overhauled. The effect is very good. However, wear is inevitable, need to be maintained frequently, maintain lubrication, and often observe the position of the roller, retaining wheel and bearing heat, timely adjustment and maintenance, in order to ensure the normal production.
The transmission device of the drum dryer has a part of the feeding and discharging device and the sealing device such as a motor, a reducer, a gear and a ring gear.
The cylinder is the base of the drum dryer, in which heat transfer and mass transfer processes are carried out, and the material is moved and transported. The supporting device of the cylinder is composed of a rolling ring, a supporting wheel and a retaining wheel. The weight of the whole cylinder is transmitted to the supporting roller through the rolling ring, and the rolling ring rolls on the supporting roller, and the retaining wheel acts to block the axial movement of the cylindrical body.
According to the working principle and structural characteristics of the drum dryer and the experience of maintaining the drum dryer in production, it is necessary to adjust the roller to ensure the long-term safe operation of the mechanical equipment of the drum dryer.
Maintain the linearity of the axis of the drum dryer; enable the cylinder to reciprocate normally along the axial direction, so that the retaining wheel remains stationary or does not move for a short period of time, so that the retaining wheels and the supporting rollers are evenly distributed. Bear the cylinder load.
The adjustment method of the axial turbulence adjustment of the drum dryer roller during the maintenance process:
1 Check whether the relative position of the wheel and the roller is still in the middle position; the force and rotation of the wheel 2 adjust the roller to adjust the center line of the roller according to the direction of rotation of the cylinder, and take the same direction in one direction. The supporting wheel forms a slight declination with the center line of the cylinder (generally no more than 0.5°, so as to prevent the supporting wheel from being shaped into a different shape) to generate a spiral upward thrust, so that it is basically balanced with the upper and lower jaws of the cylinder, so that the simplified body is relatively stable. The position is running, that is, the belt is free to reciprocate between the upper and lower retaining wheels.
The adjustment steps are as follows: When the simplified body moves downward, tighten the adjusting bolt 2 one turn, and the screw is fully retracted by one turn (note that the number of tightening turns must be equal to the number of loose turns), the simplified body will stop moving downward; if the reverse is reversed; When moving up, add liquid lubricant to the roller. At this point, the simplified body will stop moving up. If it is still moving up, tighten the bolt 1, loosen the bolt 2, and stop moving upwards. If it moves backwards, then The lubricated sleeves on the roller should be removed and, if necessary, the above method repeated until it does not move. During the adjustment process, the support roller is prevented from being skewed in different directions.
In the adjustment process, in order to move the cylinder up, Zui is better to cast some lubricating oil on the surface of the roller to increase the surface friction; otherwise, if the cylinder is to slide down, it can pour some thick grease to reduce the surface friction. . To adjust the roller, adjust the four rollers at the same time, and ensure that the wheel and the roller are not less than 50% of the contact surface.
The effect of the use of the roller adjustment greatly reduces the force on the retaining wheel, thereby improving the bearing life of the supporting and retaining wheel bearings, reducing the production cost and improving the production efficiency. At the same time, the profiled wear of the roller and the belt (rolling ring) is reduced, and the service life of the device is improved. For example, our compound fertilizer dryer has been running continuously for 4 years and has not been overhauled. The effect is very good. However, wear is inevitable, need to be maintained frequently, maintain lubrication, and often observe the position of the roller, retaining wheel and bearing heat, timely adjustment and maintenance, in order to ensure the normal production.
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