Spiral groove bearing assembly with minimized deflection
A liquid metal or spiral groove bearing structure for an x-ray tube and associated process for manufacturing the bearing structure is provided in which journal bearing sleeve is formed with a number of structures thereon that function to dissipate heat transmitted to the sleeve during operation of the bearing assembly within the x-ray tube to minimize thermal deformation of the sleeve, thereby minimizing gap size alteration within the bearing assembly. The structures formed within the sleeve are slots disposed within the section of the sleeve in which the highest temperature gradients develop. The slots enable an increase in thermal conductance away from the sleeve while minimizing the stresses created from the deformation of the portion(s) of the sleeve between the slots.
1. A method for forming a bearing assembly for use in an x-ray tube, the method comprising the steps of:
a) providing a sleeve formed of a non-refractory material, the sleeve having a seating portion forming an open end of the sleeve, the seating portion having a number of slots formed therein, wherein the sleeve is additively manufactured with the slots in the seating portion;
b) placing an amount of a liquid metal bearing fluid into the sleeve;
c) inserting a shaft into the seating portion of the sleeve; and
d) securing a thrust seal in the seating portion of the sleeve around the shaft.
2. The method of claim 1 wherein the step of providing the sleeve comprises the steps of:
a) forming the sleeve; and
b) machining the number of slots into the seating portion of the sleeve.