GYRATIONAL CRUSHER MAIN SHAFT BUSHING Russian patent published in 2022 - IPC B02C2/04 

FIELD: grinding.

SUBSTANCE: invention relates to the field of grinding. A sleeve of the main shaft of a gyratory crusher for friction fit over the uppermost conical end of the main shaft of the crusher is proposed, containing an elongated axial wall from the upper end to the lower end, passing and centered around the central axis and having outer and inner opposite surfaces aligned transversely to taper inward towards the axis. The taper is defined by the taper angle (γ) of the bushing between the inner counter face and an imaginary axis parallel to the axis. The inner surface of the sleeve has a section in the axial direction with an upper end and a lower end, and the section of the sleeve from the upper end to the lower end has a taper angle (α) of the section between the inner surface and an imaginary axis other than the angle (γ) of the sleeve defining the taper of the sleeve from the top end (208) of the sleeve to the top end (210a) of the section. The angle (α) of the section at the sleeve section is smaller than the angle (γ) of the sleeve at the sleeve.

EFFECT: invention provides high efficiency in the grinding process.

14 cl, 6 dwg