HYDRODYNAMIC BEARING, X-RAY TUBE, X-RAY SYSTEM AND METHOD OF MANUFACTURING HYDRODYNAMIC BEARING Russian patent published in 2019 - IPC F16C17/10 F16C33/10 F16C33/12 H01J35/10 

FIELD: machine building.

SUBSTANCE: present invention relates to hydrodynamic bearings, X-ray tubes, X-ray systems and a method of manufacturing a hydrodynamic bearing for an X-ray tube. Hydrodynamic bearing for an x-ray tube with a rotating anode contains rotating shaft (2) designed to provide support for a rotating anode, a support sleeve configured to seal shaft section (2), and a support structure provided between shaft (2) and the sleeve. Shaft (2) rests on the supporting structure with the possibility of rotation relative to the sleeve. Main support mechanism comprises a plurality of grooves (8) on the surface of the support sleeve and/or the shaft and lubricant held in a sealed space between shaft (2) and the support sleeve. Grooves are designed to interact with the lubricant, and the main support mechanism provides support for shaft (2) during the phase of operation of the rotating anode in a steady state. Auxiliary support mechanism comprises first support surface portions (12) on the surface of the support sleeve and second support surface portions (14) on shaft (2). Sections (12, 14) are located opposite each other and made in the form of contacting with each other surface areas. Auxiliary support mechanism provides support for shaft (2) during the starting phase and the lowering phase of the rotating anode. Sections (12, 14) are not in contact with each other during the steady state operation phase. At least part (16) of sections (12, 14) contains the first and/or second coating (18) of the bearing, which has a lower coefficient of sliding friction and a higher wear resistance compared to the base material of shaft (2) and/or the basic material of the supporting bushings. Bearing coatings (18) contain multiple layers of materials, and at least two adjacent layers contain different materials, the first adjacent layer contains amorphous carbon (t-aC) with tetrahedral coordination, and the second adjacent layer contains molybdenum disulfide (MoS₂).

EFFECT: technical result is the creation of a hydrodynamic bearing, which is able to withstand higher speeds while simultaneously increasing the service life of the bearing.

13 cl, 17 dwg