Bauxite Roll Crusher Machine pinion frequent damage causes and solutions
The Bauxite Roll Crusher Machine breaks the pinion teeth under normal operation, and there is no sign before the break, which causes the Bauxite Roll Crusher Machine automatic protection system to jump, so that the subsequent production workshop can not get sufficient and qualified pulp, and the production task belt The impact also caused great damage to the Bauxite Roll Crusher Machine. We analyze the Bauxite Roll Crusher Machines that may cause this phenomenon to find out the cause and solve the problem.
First, the cause analysis
1, view the current fluctuations record
The current data of the Bauxite Roll Crusher Machine motor is displayed by the control cabinet. The current curve before the pinion gear teeth breaks is derived from the database. From the curve, the motor current fluctuation can be seen, and occasionally a large instantaneous current value will appear. (Does not exceed the rated current value), this is because the Bauxite Roll Crusher Machine has a long service life, and some Bauxite Roll Crusher Machine parts are aging. Removing this factor is also a reasonable fluctuation range. At the moment of the breakage of the pinion axle, the current increase of the motor is 15% of the rated current, causing the self-locking of the Bauxite Roll Crusher Machine system, thus protecting other Bauxite Roll Crusher Machines in operation.
2. Check the lubrication record of the Bauxite Roll Crusher Machine
The Bauxite Roll Crusher Machine lubrication system is forced lubrication. From the lubrication record of the workshop, the time of each refueling or oil change and the amount of oil injection can be clearly known. After the pinion gear teeth break, the nozzle of the Bauxite Roll Crusher Machine is not observed on site. The blockage occurred and the entire lubrication system was intact. The gear oil in the fuel tank is sufficient, the oil quality is good, and there is no impurity. It can be determined that the problem of the pinion teeth breaking is not caused by the lack of lubrication.
3. Detect the vibration degree of the Bauxite Roll Crusher Machine motor, reducer and bearing housing
The vibration degree of the Bauxite Roll Crusher Machine is measured and recorded by the on-duty staff every two hours of Bauxite Roll Crusher Machine inspection. By checking the on-duty staff inspection record table, the motor vibration degree, the vibration of the reducer and the pinion can be found. The range of vibration of the bearing housing on both sides. It can be seen from the comparison between the measured value and the theoretical specified value that the measured value of the vibration degree of the motor is below the theoretical specified value, and the measured vibration degree of the motor belongs to the normal fluctuation range; the measured value of the vibration degree of the reducer is below the theoretical specified value, and the actual measurement of the reducer The degree of vibration is within the normal fluctuation range. At the moment of the breakage of the pinion axle, the vibration of the bearing housing is too large, which is caused by the breakage of the pinion axle. In general, the pinion gear teeth are not related to the vibration degree.
4, detecting the Bauxite Roll Crusher Machine operating temperature
The operating temperature of the Bauxite Roll Crusher Machine is set by the meter control workshop according to the temperature specified in the Bauxite Roll Crusher Machine operating instructions. The set temperature of the bearings on both sides of the motor, reducer and pinion is different. The temperature is also controlled by the automatic system and has a chain function. Exceeding the set temperature will definitely cause the Bauxite Roll Crusher Machine to stop and play a role in protecting the Bauxite Roll Crusher Machine. At the moment when the pinion teeth broke, the temperature of the Bauxite Roll Crusher Machine increased slightly but did not exceed the set value. The temperature fluctuation range was not large and relatively stable.
5, observe the size of the gear tooth surface and the measurement gear meshing clearance
After the Bauxite Roll Crusher Machine stops and confirms that the pinion teeth are broken, the Bauxite Roll Crusher Machine is disassembled to observe and measure the gap between the gear meshing surface and the gear meshing. The gear meshing gap is measured by the feeler gauge, and the data shows the gear meshing. The gaps are different. By observing the surface marks of the meshing friction of the large and small gears, it can be found that the pinion teeth are broken, and the surface of the large gear teeth has obvious friction marks. From the position of the gear teeth indicating the marks, this indicates that the meshing mode of the large and small gears is Irregular, unscientific, this form of engagement will inevitably lead to accelerated wear of the gear teeth.
Second, the problem solution
Firstly, replace the new pinion gear, and then adjust the height of the bearing housing, reducer and motor in turn, then the new and old gears are meshed. The new gear should be used as the reference to process the large gear. After the test, the large and small gears are meshed to make it safe. Overrun period. After installing the pinion gear, first adjust the bearing housing, and determine the adjustment position of the reducer by measuring the gear meshing clearance multiple times with the feeler gauge. Then, the motor is adjusted with the reducer as the reference. It is also necessary to measure the coaxiality between the wheel gap and the shaft between the motor and the reducer. After the reducer adjusts the height, there is a gap between the height of the reducer and the motor. By measuring with a dial gauge and measuring the gap of the coupling with a feeler gauge, the gap between the wheels is reasonable and the coaxiality of the shaft is good. After fixing, fix it with a pin to maintain the adjustment effect. After grinding the large gear, firstly, the orange-colored lead oxide is applied to the meshing gear teeth. Through the meshing of the gears, the protruding parts on the gear teeth will have different brightness points. A manual electric Bauxite Roll Crusher Machine is required to sharpen the bright spots on the gear teeth, so that the entire tooth surface is in a plane.
This work requires a certain technical personnel to operate, otherwise it is likely to cause the entire large gear to be scrapped. When the large and small gears mesh on the large gear teeth, a uniform bright spot is left, indicating that the large and small gears are meshed. After the Bauxite Roll Crusher Machine is started, there will be a large vibration, especially the bearing housings on both sides of the pinion gear are particularly prominent. This is a normal phenomenon. The new and old gears mesh through the running-in period, and the Bauxite Roll Crusher Machine runs smoothly.
The stable operation of the Bauxite Roll Crusher Machine plays a vital role in the entire alumina production line, ensuring the stable operation of the Bauxite Roll Crusher Machine is the top priority of the entire plant. If there is a problem with the Bauxite Roll Crusher Machine, it should be analyzed in time, and all the factors should be integrated to determine the problem to solve the problem better.