Vibrating screen equipment is composed of various parts, such as screen box, screen, eccentric shaft, vibration exciter, etc. The maintenance of the vibrating screen is the maintenance of each component. Among them, lubrication is compared in maintenance For important items, any mechanical equipment needs lubrication to operate normally. So which parts of the vibrating screen should be lubricated?
1. Eccentric shaft of vibrating screen
The mine vibrating screen is mainly rotated by the eccentric shaft in the machine, and the machine is forced to reciprocate in the direction by the connecting rod to realize the mechanical equipment of the material screening operation. During the use of the vibrating screen, it is necessary to frequently maintain and repair the machine, especially the maintenance of the eccentric shaft, so it is necessary to lubricate the eccentric shaft of the vibrating screen.
(1) The amount of grease added to the eccentric shaft of the vibrating screen should be filled with one-half to one-third of the internal space of the eccentric shaft. It should be reduced to one-third when the eccentric shaft is running at high speed, otherwise Too much grease will cause the temperature of the eccentric shaft to rise and damage the equipment.
(2) When the vibrating screen is in high-speed and high-temperature conditions, the grease can no longer adapt to the eccentric shaft lubrication of the machine, and oil lubrication is required. Commonly used lubricating oils include mechanical oil, cylinder oil, high-speed mechanical oil, compressor oil, and transformer Oil, turbine oil, etc.
(3) Through oil lubrication, a large amount of heat energy produced by the equipment can be taken away, and the vibration and noise of the machine can be reduced.
(4) When choosing the lubricant for the eccentric shaft of the vibrating screen, the viscosity is its important characteristic, and the viscosity of the lubricant should be controlled at 12cst-15cst. Note that the higher the speed of the eccentric shaft, the lower the viscosity of the lubricating oil, and the higher the viscosity of the lubricating oil when the load is heavy.
2. Vibrating screen exciter
For the lubrication of the vibrating screen exciter, gear oil should be selected, and the type of gear oil is different at different temperatures.
(1) When the ambient temperature is less than 5°C, use No. 70 industrial gear oil. When the ambient temperature is greater than 5°C, use No. 90 industrial gear oil.
(2) Grease is injected into the groove between the sealing plate of the vibrating screen exciter and the isolation ring to seal, and the oil cup is used to fully inject grease once a week.
(3) The amount of oil injection depends on the size of the vibrating screen exciter. A small amount of oil drops continuously dripping out, indicating that the oil amount is just right. If a large amount of lubricating oil overflows, the oil level is too high, otherwise the oil amount is too low.
(4) The eccentric block of the vibrating screen exciter runs relatively under the action of external force; the bearing of the vibrating screen exciter should be refilled with grease regularly, usually once every 3-5 months;
(5) The vibrating screen exciter runs for 5-6 months, minor repair once, and major repair once a year. The minor repair removes the dust and dirt of the machine. In addition to the necessary minor repairs and maintenance, the wear rate of the bearing must be checked, if necessary Immediate replacement and maintenance.
3. Various bearings of vibrating screen
Lubrication has an important impact on the fatigue life and friction, wear, temperature rise, vibration, etc. of the rolling bearing of the vibrating screen. Without normal lubrication, the bearing cannot work. Analysis of the reasons for the damage of the vibrating screen bearing shows that about 40% of the damage of the vibrating screen bearing is related to poor lubrication. The lubrication methods of vibrating screen bearings are mainly divided into grease lubrication and oil lubrication.
If lubrication is used, thin oil lubrication is required, and the oil is changed after 40 hours of initial operation, and the normal service cycle thereafter is about 800 hours; if grease lubrication is used, it needs to be considered in terms of the speed, load, temperature, etc. of the bearing during operation .
The above is the answer to which parts of the vibrating screen need to be lubricated, mainly the eccentric shaft, exciter and various bearing components of the vibrating screen need to be lubricated. One-third to one-third is suitable. Lubrication is the maintenance of the vibrating screen equipment, so it is necessary to do a good job of lubricating the vibrating screen.