Magnetic levitation bearing assembly and compressor

A magnetic levitation bearing assembly, comprising:

• a magnetic levitation bearing, comprising a first iron core, a second iron core and a thrust disc, wherein the thrust disc is arranged between the first iron core and the second iron core along an axial direction of the thrust disc, a first working clearance exists between the first iron core and the thrust disc, and a second working clearance exists between the second iron core and the thrust disc;
• a shell, the first iron core and the second iron core are both fixedly connected with the shell;
• and
• a working clearance adjusting device, disposed between a radial inner periphery of the shell and the thrust disc along a radial direction of the thrust disc and between the shell and the second iron core along the axial direction of the thrust disc, wherein an axial end of the working clearance adjusting device abuts against the second iron core, a void gap exists between the shell and the second iron core, and the working clearance adjusting device is configured to adjust a sum of the first working clearance and the second working clearance to conform to a preset value,
• wherein the working clearance adjusting device is disposed between the first iron core and the second iron core along the axial direction of the thrust disc, and the other axial end of the working clearance adjusting device abuts against the first iron core,
• wherein the magnetic levitation bearing assembly further comprise a first coil and a second coil, wherein the first iron core is provided with a first coil accommodating portion for mounting the first coil and a first mounting portion for connecting the shell, the second iron core is provided with a second coil accommodating portion for mounting the second coil and a second mounting portion for connecting the shell, and the working clearance adjusting device is disposed between the first mounting portion and the second mounting portion along the axial direction of the thrust disc, two axial ends of the working clearance adjusting device respectively abutting against the first mounting portion and the second mounting portion, and
• wherein a radial size of the second mounting portion is greater than that of the first mounting portion, and the shell is provided with a step-shaped matching portion for matching with the first mounting portion and the second mounting portion, the step-shaped matching portion being provided with a first mounting segment and a second mounting segment with a diameter greater than that of the first mounting segment and connected with the first mounting segment through a stepped surface, wherein the stepped surface is fitted with an end of the first mounting portion away from the thrust disc, and the void gap exists between an end of the second mounting segment away from the first mounting segment and another end of the second mounting portion close to the thrust disc.