Causes of bevel gear grinding in cone crusher
Author:xixi Addtime:2019-07-15 Click:
1. The normal meshing condition of bevel gear is destroyed.
The driving principle of the cone crusher: the small bevel gear driven by the asynchronous motor and the gear shaft, the big bevel gear driven by the small bevel gear and the eccentric shaft set. The spindle with taper and the body of moving cone is driven by the eccentric spindle, the axis of which is driven by the spherical bearing as its vertex, and moves around the center line of the crusher. Because of the strong centrifugal action of eccentricity and weight distribution block, the thick edge is always pressed on the frame bushing, while the thin edge always keeps a certain gap with the frame bushing. So the big bevel gear is notThe center line of the crusher is rotated, and the center line of the crusher is rotated in the radius of half a / 2 of the gap a of the frame bushing.
The normal engagement of a pair of bevel gears must be that the top of the bevel of the two gears intersects at one point, and the section circle is overlapped. This special operating state of the big bevel gear destroys the normal meshing relationship of the pair of bevel gears. Therefore, there is a great impact load and sliding friction on the tooth surface of the gear during running. In addition, Because the clearance between eccentric shaft sleeve and frame bushing of cone crusher is larger than that between plain sliding bearing and PY2200 cone crusher, the clearance is designed to be 44.6mm, and the bevel top distance of the bevel gear is ±22mm during operation. Large and small bevel gears subjected to impact load, WearOr broken teeth are more common, especially small bevel gears, compared to big bevel gears, because of the small number of teeth, the root of the teeth is thin, broken teeth are more common, this is the cone crusher gear wear fast, And often one of the main causes of tooth breakage.
2, rigid connection transmission
The transmission form of cone crusher: the asynchronous motor is rigidly connected with the gear shaft through elastic coupling. When the cone crusher runs over iron or overload, it is easy to cause the bevel gear to break its teeth.
3,A frequent or large bite.
The spring of the crusher plays a protective role when the ore is sometimes overcast, but when the iron is frequently or bitten by a large piece of iron, it often causes the spring to fail, resulting in the damage of other parts of the body, such as the bevel gear of the size is toothed, and so on.
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