Gyratory crusher main shaft sleeve

A gyratory crusher main shaft comprising:

• an elongate shaft body having a lower end for positioning at a lower region of the crusher and an upper end for positioning at an upper region of the crusher relative to the first end, wherein an axial region of the shaft body extending from the upper end is tapered longitudinally relative to a center axis of the shaft body such that a cross sectional area of the shaft body at the tapered axial region decreases in a direction from the lower end to the upper end, and wherein tapering of the tapered axial region is defined by a shaft tapering angle between the outward facing surface and an imaginary axis that is parallel with the center axis;
• and
• a sleeve comprising an elongate axial wall extending from an upper end to a lower end and being centered around the center axis, the axial wall having an external facing surface and an internal facing surface aligned transverse to taper inwardly towards the center axis, and wherein the tapering is defined by a sleeve tapering angle formed between the internal facing surface and an imaginary axis arranged parallel with the center axis, and wherein the internal surface of the sleeve has a section in an axial direction having an upper end and a lower end, the section, from the upper end to the lower end, having a section tapering angle formed between the internal surface and the imaginary axis, the section tapering angle being different compared to the sleeve tapering angle defining the tapering of the sleeve from the upper end of the axial wall to the section upper end, wherein the section tapering angle of the sleeve section is smaller than the sleeve tapering angle of the sleeve, the tapered axial region of the shaft body being configured to mount the sleeve, the sleeve being friction fitted over the tapered axial region at the upper end of the main shaft such that the sleeve is positioned in contact with an outward facing surface at the tapered axial region of the upper end.

A gyratory crusher comprising:

• a main shaft having an elongate shaft body having a lower end for positioning at a lower region of the crusher and an upper end for positioning at an upper region of the crusher relative to the first end, wherein an axial region of the shaft body extending from the upper end is tapered longitudinally relative to a center axis of the shaft body such that a cross sectional area of the shaft body at the tapered axial region decreases in a direction from the lower end to the upper end, and wherein tapering of the tapered axial region is defined by a shaft tapering angle between the outward facing surface and an imaginary axis that is parallel with the center axis;
• and
• a sleeve comprising an elongate axial wall extending from an upper end to a lower end and being centered around the center axis, the axial wall having an external facing surface and an internal facing surface aligned transverse to taper inwardly towards the center axis, and wherein the tapering is defined by a sleeve tapering angle formed between the internal facing surface and an imaginary axis arranged parallel with the center axis, and wherein the internal surface of the sleeve has a section in an axial direction having an upper end and a lower end, the section, from the upper end to the lower end, having a section tapering angle formed between the internal surface and the imaginary axis, the section tapering angle being different compared to the sleeve tapering angle defining the tapering of the sleeve from the upper end of the axial wall to the section upper end, wherein the section tapering angle of the sleeve section is smaller than the sleeve tapering angle of the sleeve, the tapered axial region of the shaft body being configured to mount the sleeve, the sleeve being friction fitted over the tapered axial region at the upper end of the main shaft such that the sleeve is positioned in contact with an outward facing surface at the tapered axial region of the upper end.