Патент USA US2404295код для вставки
Juäy 16, 194€. 2,404,295 J. D„ KLINGER , BEARING Filed NOV. 22,' 1943 Hn ‘ Patented July 16,946 ' , 224045295.l UNITED . STATES PATENT ' "OFFICEA 4 BEARING v , y VJames D. Klinger, Detroit, Mich.,A assigner to ~-Chrysler Corporation, Highland Park, Mich., a corporation of Delaware> p . Application November 22, 194s, serial No. 511,281 ` , 5 Claims. 1. This invention relates to improved .bearing sur face and the method of making the same.r Morek particularly, the invention pertains to im provements insurfaces of machine parts which operate under load in4 rubbing contact with each other inl the presence of a lubricant. Here‘tofore, lubricants containing sulphur or sulphur bearing compounds have been employed in many instances during both run-in and subse quent operations of machine parts of this kind in (c1. 3019237) " " ily mated with- each other andfwhich are adapted to be Well lubricated by conventional lubricants may be formed on parts which .move . relative to and in contact with each other by de positing a selenium coating thereon. The selen vium coating may be produced as an immersion deposition or it may be electrolytically deposited. Thickness of the coating may be predetermined . with` respect to the construction, vsizeand load'- carrying requirements of the parts. yOnly one of a pair of parts which operate in contact with each order to produce on the surfaces of the respective other may be coated or surfaces of both parts may parts which operate in bearing-like or other rub be similarly coated with selenium. While this bing contact With each other a film-like layer or coating can be used to advantage and with an ac deposition which is believed to comprise a sulphide companying improvement of the lubrication of of the metal, frequently ferrous, of which the parts comprising numerous metals, it is particu parts consist. Sulphur containing lubricants are larly adapted for use on parts comprising ferrous frequently used for this purpose during run-in metal. operations of engines and other devices in which A satisfactory selenium coating may be pro normal lubricants are subsequently used in order to build up bearing and rubbing contact surfaces 20 duced on parts comprising ferrous metal as well as on numerous metals lower in the electromotive Which Will become mated with each other more series than selenium by i'mmersing such parts in readily than the metal of which the parts are formed. In other devices such as gear trans a bath comprising a solution of a selenium bear ing compound. A suitable selenium coating bath missions, a sulphur bearing lubricant may be used for this purpose throughout the life of the mecha 25 may be produced by dissolving in 80 parts by weight of a 5% phosphoric acid solution, 20 parts nism without objectionable consequences. by weight of selenium dioxide. The phosphoric One of the main objects of the invention is acid solution may vary in concentration from sub the provision of bearing surfaces having `proper stantially 2%% to 10%. It is understood that ties similar to those obtained by the use of sulphur the final bath comprises an aqueous solution of containing lubricants which can be formed to a selenious acid. Selenium coating baths may be desired thickness on such parts prior to assembly made up of from 5 parts by weight of seleniuml thereof. dioxide and 95 parts by Weight of the phosphoric Another object of the invention is rto provide acid solution, to substantially a saturated solution bearing surfaces of this character which do not require replenishment during operation, by the 35 of selenium dioxide in such phosphoric acid solu tion. The selenium content may beintroduced Y action on the metal of the parts of lubricant con into the bath by the addition thereto of any solu-` tained agents. ble selenium salt such as salts ,of selenious acids, A further object of the invention is to provide for example, sodium and potassium salts of seleni a bearing surface material which will withstand . the normal run-in operations to which parts `of 40 ous acid. In Fig. 1 of the drawing is illustrated a shaft I0 this kind are frequently subjected and remain on journalled in a bearing I I, having a selenium de the parts thereafter to serve in presenting well posit I2 on its bearing surface. The portion of mated contacting surfaces during subsequent nor- . the shaft In which is received in the bearing may mal operation. . An illustrative embodiment of the invention is 45 also be provided with a deposit of selenium I3. A passage I3’ is provided in the bearing Il forl shown in the accompanying drawing in which: supplying lubricant to the contacting surface _of Fig. 1 is a vertical sectional view of a shaft and the shaft and bearing. ‘ ' ' bearing assembly illustrating an embodiment of An assembly comprising a rotatable cam I4 the invention. .n Fig. 2 is a side elevational view, partly in sec 50 and shiftable follower I5, embodying the inven tion, is illustrated in Fig. 2.- -The follower I5 is tion, of a cam, follower and follower guide assem- L reciprocably mounted in a guide passage I6 'bly illustrating other embodiments of the inven formed in a support I1. A selenium deposit I8 tion. is provided on theperiphery of the cam I4 for Rubbing contact surfaces embodying the in vention which are particularly adapted to be read 55 contacting the end of the follower I5 which may 2,404,295 s . 4 Y tent consisting substantially entirely of selenium and having bearing properties. 2. An assembly including relatively movable . also be provided with a selenium deposit I9.~ The Y periphery of the follower l5 as well as the wall 2 of the passage-*I6 may be likewise coated with Í selenium deposits 20 and 2| respectively. vSuit metal parts having portions in lubricated con tacting rubbing relation, and a bearing layer ‘ able lubricant, such as lubricating oil, may be `supplied to the contacting selenium surfaces of having a metal content consisting substantially entirely of selenium on said portions Vof each of j the cam and follower by a tube 22 and to the contacting selenium surfaces of the support and follower throughl an Voilpassage 23 formed >in said parts, said bearing layers being Vadapted toY readily mateV with each other during run-in oper the support. Only one of each of the contacting _ ation of said assembly. portionsvof various relatively moving parts show-n , 3. An assembly including relatively movable Yin Vthe-drawing may be coated with a seleniumy . ` ferrous metal parts having portions in lubricated ' Y deposit if desired,`although longer'bearing wear-r ‘ contacting rubbingrrelation and a metal coating on said portion of one of Ysaid parts comprising an. immersion deposition Yof selenium .adapted to mate readily'wíth said portion of said other part ing life is believed to be obtainable when the contacting surfaces'of both parts. comprise sele nium. _ ~ Y - ^ K l Although >but several specific embodiments of the invention are herein shown and described, ï it will be understood that various changes in the during run-in operation of Said assembly. 4. A metal part having surface portion adapted >for bearingdike rubbing contact with anotherl j l `sequence of operations, steps and materials em 20V part, and a bearing layer on said portion of said î ployed .may be made withoutY departing from the first mentioned part having a metal content con spirit of the invention.. 'I claim: ` l . Y Vsisting substantially entirely of selenium. ` 5. A yferrous metal part having a surface por f l. An assembly I including relatively movableY tion adapted for bearing-like rubbing contact metal parts having surface portions in rubbing with another part,` and a bearing layer on said contacting relation, and a coating onV said sur portion of said first mentioned part having a Y iface portion Yof one of said parts adapted to mate `readily with said surfaeeportion of the Vother metal content consisting of an` immersion deposi tion of selenium. `part during run-in operation of said assembly comprising a nlm-like layer having a metal con Y 30 Y Y, JAMES D. KLINGER.