THE WEAR OF THE OMR 100 GEROLLER HYDRAULIC MOTOR PARTS

Abstract

Sauer Danfoss produces a large range of hydraulic equipment, which is installed on tractors, agricultural and construction equipment of Russian and foreign manufacturers. The hydraulic motor is one of the most frequently encountered components of hydraulic systems of machines. (Research purpose) The research purpose is assessing the technical condition of worn rollers, housing, shaft, sprocket and holder of the Danfoss OMR 100 roller hydraulic motor; to conduct micrometer studies of parts. (Materials and methods) Measurements were carried out using smooth digital micrometers of the SHAN brand with a division price of one micrometer, an ICH-type clock indicator, an electronic lever-type nutrometer of the QLR Research Center with a division price of one micrometer. All parts were degreased before measurement. The working surface of the rollers and sprockets was studied using a magnifier LI-3 10x GOST 25706-83. Measurements were carried out in two perpendicular directions and in several sections. (Results and discussion) It was found that the average wear on the side is: roller - 6 micrometers; seat under the roller - 2; the wear of the shaft hole in the housing is 2.5; the wear of the shaft necks is 1.5; the end surfaces of the sprocket and rollers are 5.5 micrometers. (Conclusions) The working surfaces of the rollers and sprockets have the greatest wear. The values of the average wear of these parts suggest that the method of electric spark treatment will be appropriate to restore worn surfaces. This method guarantees the production of a coating of small thickness with good tribotechnical properties under conditions of waterjet wear.