Roller press of the common faults and eliminate 2021 -
01 -
28 Wang Zhanguang (
Jiaozuo strong cement)
Rolling machine widely used in the cement grinding to combined grinding system is presented, and the tube mill is more, is the cement grinding efficiency is higher, the improvement of cement particle gradation is more effective form of grinding.
Operation of its failure form is varied, the author attributed the following, for your reference.
A typical failure, 1.
Fine powder of low yield rate of roller press powder yield rate mark the work level and efficiency of roller press, is one of the most key indicators, there are several facets to its influencing factors.
First is the pressure is low, if the production medium oil cylinder pressure is low, will cause the insufficient pressure of extrusion area, to meet the material crushing limit pressure, the result is fine powder, less about the relation of fine powder yield rate will be introduced in the next.
Second, roller press roller surface damage, the roller surface and deep, cause local material compression degree is insufficient, coarse particle.
Third, lateral plate failure, edge effect, without squeezing more escape.
Fourthly, the heavier material segregation phenomenon, on one side of the particles is large, the other side of the powder, the change of roll gap is bigger, some fine particle materials will getaway in the roll gap bigger.
2.
Rolling mill vibration is larger as the roller press, due to the unstable material particles, lacking the ability to resist material reaction, roll back and forth motion is normal, but if the mobile is too large, such as the impact to the roll gap, affect the drive cannot be regarded as normal, the reason also has several aspects.
First, pressure is not enough, when the pressure is insufficient, with hard and large material into the roll gap, due to the grinding pressure, no broken material and dynamic roll will push of the lines in the material before and after the fast moving, vibration will start from here.
Second, bearing damage, when bearing damage, the shaft failure, the positioning of the vibration is inevitable, and accompanied by abnormal noise and bearing heating.
Thirdly, speed reducer failure.
Fourthly, material segregation or foreign bodies entering the roll gap.
3.
Feer is hydraulic oil hydraulic oil, the reason comes from the oil in the tank and the pipeline friction and agitation, the main reason is low pressure, the filling pressure accumulator is lower, when the roller pressure is not enough to crush materials, with the fast back and forth motion of roll, hydraulic oil will oil system in tossed back and forth, fever is inevitable, and even the oil;
The hydraulic oil under shear and cylinder and the piston in the cylinder friction is also contributing to the oil temperature rise.
4.
Roller press frequently jump stop roller press jump stop, generally speaking, there are several reasons, first is the motor overload, bearing heating, such as fault, instruction outage protection components.
Secondly transfinite reducer vibration, temperature overrun, jump stop command.
Third, the main bearing heating roller pressure jump stop.
Fourthly, roll press roll gap out-of-tolerance jump stop, this is the most common fault roller press jump stop, mainly caused by pressure or inadequate material segregation.
Fifthly, a component failure, such as hot components such as open circuit, displacement sensor failure.
5.
Roller press roller press is suddenly lost all of a sudden, the pressure loss caused by hydraulic system failure, such as the accumulator capsule rupture, damage to the valve parts, leakage and oil cylinder leaks, etc.
Second, the failure of elimination method 1.
Increase how much powder powder production yield rate mainly depends on the pressure, should be appropriate to improve the oil pressure, such as the original oil cylinder pressure 8 million mpa, can be raised to 10 million mpa is even higher, the material in the compaction area were more completely shattered, lower 0.
08 triage, make its passing rate of 40% or more, but exactly how much oil to, need to see the cross-sectional area of the oil cylinder size, the goal is to crush materials, can also by detecting the fine powder content of the cake, determined by the cylinder pressure.
Second, focus on the lateral baffle plate through the clearance adjustment to reduce the edge effect, reduce the escape without extrusion materials.
Thirdly, to reform the weightlessness of warehouse, alleviate material segregation, avoid powder nature escapes from the roll gap.
2.
Reduce rolling machine vibration method of reducing roll press, the most effective way is to increase roller pressure, the greater the pressure, the greater the effect on vibration damping, vibration is reduced.
Second, is the segregation of the material and the foreign body in.
Meet the vibration of the roller press, must carry on the detailed study, to determine the vibration source, suit the remedy to the case.
3.
Feer is hydraulic oil hydraulic oil, are generally accumulator filling pressure is too low, resistance to roll around to move a large quantity of frequent and mobile, send back and forth the hydraulic oil in the oil cylinder and the pipeline transmission, the friction heat production.
This shall increase the set pressure, improve accumulator canned pressure, fever naturally.
4.
Roller press suddenly jump stop or frequent jump stop roller press jump stop more frequently appear in the roll gap of super bad, at this time should check whether displacement sensor failure;
Material causes rolls skewed segregation, foreign body into the same roll gap caused by super poor;
Third, to check whether roller surface spalling damage.
If all of a sudden jump stop, should find out the reason.
Such as whether the motor fault or overload protection, speed reducer and the host whether bearing fever more than set temperature, the vibration value is normal, etc.
5.
Roller press hydraulic system pressure loss suddenly all of a sudden loss of pressure, first check whether a load cell failure, check whether the ground has a hydraulic oil leakage, if any must be pipe, valve parts crack damage;
Without the above phenomenon, is the internal hydraulic components, such as damage or accumulator burst out one by one after find out problems, timely treatment.
At the same time stressed that if foreign body into the must take effective means to pick up a foreign body, or it will cause more damage.
Conclusion: this is just some common faults of roller press or the typical failure analysis and processing, is in the level is limited, conclusion is not comprehensive or there is wrong, still hope readers to comment.
thank you
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Source: wisdom cement)
