Combined classifier on the bearing oil analysis and processing

Combined classifier on the bearing oil analysis and processing, 2020 - 05 - 25 Xue Jinwei He Xigui ( Shaanxi north yuan group cement co. , LTD. ) Abstract: in view of the classifier bearing oil leakage problem, and through the classifier axis wear parts grinding, processing on bearing gland and increase oil seal installation outside diameter ( Increase by 160 mm to 170 mm) , at the same time, increase the oil seal installation position height, from a oil seal installation location to the installation position of two oil seal, install nozzle and other processing, no oil leaking in the field after six months of observation, thoroughly solved this difficult problem. Keywords: classifier; Bearing; Wear and tear; Oil 1, briefly introduces the problems a company & 2 times; 3000 t/d clinker production line is equipped with 2 sets & empty; 3. 8米× 13 m production line of raw material grinding and combined classifier. Two classifier respectively in 2010 and 2011 into production, classifier driving mode for the motor and reducer input shaft connection, input and output to take right way transmission, reducer classifier bossing set vertically from top to bottom and throughout the entire rotor, shaft hub of the structure of the way as the outer sleeve fixed, internal through two sets up and bearing spindle rotation. Two (2) classifier to run to 2017 successively on the shaft hub bearing oil gland seal position, because of the spindle bearing adopt HM46 anti-wear hydraulic oil is forced lubrication, lead to bearing gland on site (especially serious oil spill The height of each class need to dilute gas station filling oil 25 l) , leakage of lubricating oil on throughout the maintenance platform. For a long time the continuity of the oil is not only bring daily maintenance of a hard work, and there is a big security hidden danger and environment pollution. 2, analysis of the causes for classifier leak problem, on the system when parking overhaul maintenance staff on bearing gland area is dismantled, found that due to the long running, bearing gland seal on the spindle surface grinding groove, oil seal, the effect was less than seal, lead to lubricating oil out of the clearance between shaft and oil seal leakage. Second, main shaft bearing gland on structural design is unreasonable, the gland only adopt single oil seal oil seal, usually thin oil sealing point generally adopt double seal ( + J type soft steel skeleton oil seal oil seal) To seal. Mechanical parts wear and tear of the most common treatment is to replace the corresponding parts or demolition of surfacing welding lathe processing. These two measures down time is longer, need professional maintenance team, the high cost. 3, treatment measures in accordance with the above analysis, decision to online repair worn parts processing. Check the wear part, found that the main shaft on the surface of the groove depth reaches 1. 5～2mm。 Through research to discuss, decided to set set of the spindle and wear parts, by changing the way the worn parts between the spindle oil seal diameter for processing. Specific implementation is as follows: ( 1) First measured spindle diameter and the width of the wear axial position, main shaft diameter & empty; Wear 160 mm, the width of the axial position of about 20 mm. According to machining diameter measuring size & empty; 160 mm, outside diameter & empty; 170 mm, 50 mm height of shaft sleeve, grinding machine processing requirements after the external surface of the shaft sleeve lathe processing, so as to ensure the smoothness of the surface, reduce the oil seal wear. （ 2) To the lathe machining bearing gland, increase oil seal is installed outside diameter ( By & empty; Increases to 160 mm & empty; 170毫米) , at the same time, increase the oil seal installation position height, from a oil seal installation location, increased to two oil seal installation location. （ 3) In the new processing good bearing gland lateral ( Oil seal installation location) Drilling ( ∅ 10毫米) And install the grease nipple. Nozzle is used in filling dry between two oil seal oil, use dry oil play the role of the third layer sealing. （ 4) Will be processed heat sleeve and installed on the main shaft wear position, then use welding spot welding on the shaft sleeve and the spindle, to prevent the collar off or displacement. （ 5) Install two inner diameter & empty; 170 mm, outside diameter & empty; New oil seal (200 mm, height of 15 mm Crude oil seal size is inner diameter & empty; 160 mm, outside diameter & empty; 190 mm, 15 mm height), To the new machining bearing gland, then returned it. Before and after the processing of oil seal structure is shown in figure 1. Figure 1 main shaft oil seal structure before and after the transformation form 4, use effect through a series of reform measures, the boot operation inspection, classifier bearing smooth operation, no leakage, transformation effect is good, classifier works on bearing not yet occurred leak, achieve the desired purpose. Source: 'cement' 3, 2019