Views: 5 Author: Site Editor Publish Time: 2021-04-05 Origin: Site
In the Screw Conveyor used in metallurgy, mining and chemical industries, its shaft end glands are widely used for packing seals. Because the coal powder has a particle size of 200 mesh, it is a fine powder and has a certain degree of fluidity. Therefore, a lot of coal powder is often leaked due to the poor sealing of the shaft end of the conveyor head. Asbestos packing, oil-impregnated wool felt, oil-impregnated asbestos rope and flexible graphite ring have been used as sealing packing, but the leakage control effect is not ideal. Every day, pulverized coal leaks around the equipment, which is wasteful and pollutes the environment and affects civilized production.
The test was conducted on the Screw Conveyor, that is, drilling through holes, tapping, and installing a nozzle on the flange outer ring of the head packing gland, and processing two oil grooves in the gland hole wall to communicate with the nozzle hole. Use a grease gun to press in the grease from the grease nipple and make it enter the oil groove to fill the gap between the surface of the rotating shaft and the inner hole of the gland. The original asbestos packing remains unchanged. This structure allows the coal powder to pass through more The secondary sealing achieves a good sealing effect. After field test, the conveyor with oil nozzle is obviously better than the unmodified conveyor. Practice has proved that this method is effective and can prolong the service life of the screw shaft.
It is reminded that the following two points need to be noted:
1. Lubricating grease must be filled in the gland every 3-4 days, otherwise the pulverized coal will still leak if the grease is consumed or dried up.
2. After each assembly and disassembly, the gland screw must be tightened for about a month after starting up and running to make the packing tightly fit the shaft. But it is not necessary to press too tightly, the gland bolts can be adjusted according to the actual situation in the future.