The cone bush of the spring cone crusher
is the main shaft bush. The cone bushing design is also the design of the cone hole in the eccentric bushing, because the cone bushing is fitted in the cone hole of the eccentric bushing and the cone bushing inner hole is in clearance fit with the main shaft. Therefore, the design of the cone bushing is related to the suspension point of the movable cone and the intersection of the center line of the cone hole of the eccentric shaft sleeve and the center line of the crusher (called the suspension point of the eccentric shaft sleeve and the movement state of the eccentric component.
In order to make the crusher work, a reliable lubricating oil film is formed on each friction surface; in order to compensate for the manufacturing and assembly errors of the eccentric part and to prevent the eccentric part from thermal expansion and deformation jamming. There must be a proper gap between the friction surfaces of the eccentric part. If the gap is too small, it is easy to generate heat and hold the shaft; if the gap is too large, it will reduce the service life of the machine and cause shock and vibration. Generally, it can be determined according to the actual situation with reference to the actual data of the existing crusher.
In this way, the inner hole size and outer size of the cone bushing (the bushing thickness is known) can be determined, so after the cone bushing structure size has been determined, the pv value can be checked. At the same time, the size of the inner taper hole of the eccentric sleeve is also determined. The intersection of the center line of the inner cone hole and the center line of the machine is the suspension point of the eccentric bushing, and it changes on the center line of the equipment with the left and right movement of the eccentric bushing. The change value is determined by the gap between the eccentric bushing and the frame bushing. It depends on the size. The suspension point of the movable cone is theoretically a fixed point, so the movement of the cone crusher can be regarded as the precession of a rigid body around a certain point in space.
In order to ensure higher efficiency of the crusher, different strokes should be used for the same crusher corresponding to different materials, different cavity types, and different crushing ratios. In order to obtain different strokes, double eccentric bushings are used, that is, the bushing in the inner hole of the eccentric bushing is also an eccentric bushing. By rotating the eccentric bushing at different positions, different eccentric distances and different precession angles can be obtained, which can satisfy different swings. Itinerary requirements.