Bearing installation technology measurement dimensions of work before

Device for rolling bearing, to fix the dial gauge box shell end face, make the table touch the top of the head in the bearing axis shift bearing ring raceway on migration, migration transformation while see dial gauge pointer, if the deflection of the pointer, clarify among axis and axis line not vertical. If the box shell hole deep, also can use extended dial gauge head hone. This is a very good hone shaft circle and axis perpendicularity of the median line method. The wrong bearing device, not only operation of the bearing and the joint venture will face badly worn. Because the circle with the seat and the difference is not obvious, the assembly of cockiness special be careful, can't appear upside. Device accurate time should be when the seat can take the initiative to adapt to the roller rolling, to ensure that is located in the upper and lower roller ring raceway. In addition, self-aligning ball bearing seat and bearing holes should also be left between 0. 2 - 0. 5 mm gap to compensate the error in the composition of the defective parts processing, installation, when the bearing ring in the middle shift operation, the clearance can ensure that its active adjustment, the avoidance of friction, make its normal operation. Otherwise, will make serious damage of the bearing. Test 1, the feet of common types: rolling bearing of rolling mill bearing, joint bearings, wheel bearings, insert ball bearing, thrust ball bearings, one-way bearing, full roller bearings, thrust roller bearings, linear motion bearings. For larger diameter rolling bearing, the gap is larger, with a narrow feeler direct detection. For small diameter of the bearing, clearance is lesser, inconvenience with feeler, bearing clearance, however, must use the thickness of the appropriate feeler. 2, pressure lead test by pressing lead was detected using feeler, accurately detect rolling bearing clearance but more trouble. Aluminium wire used in the test should be soft, shoulds not be too big or too small in diameter, the diameter of the ideal of clearance of 1. 5 ~ 2 times, the actual work showed soft lead wire for testing. Detection, first open the bearing cover, the diameter of the lead wire, appropriate to cut it into 15 ~ 40 mm long segments, on the shaft neck and upper and lower bearing interface, cover the bearing cover, tighten the retaining bolt torque by the regulation, unscrew the bolt, then remove the bearing cover, micrometer is used to inspect flattening lead wire thickness, and the average of the top bearing clearance. If the top gap is too small, can add pad on the surface of the upper and lower tile combination. If too large, the reduction of pad, scraping the inquiry or watering the tile again. Bearing ring circumferential surface should have good bearing and force uniform, in order to reduce the deformation, and can give full play to the high temperature of bearing capacity. Ring in its surface can't slide along the tangent direction, otherwise it will damage the mating surface. Freedom end bearing must be able to adapt to changing with the length of the shaft and bearing seat holes, which must have to adapt to the axial location within a certain range of swimming ability. Must pay attention to the bearing installation and easy disassembly, saving time and expenses for the province. Bearing inside diameter: before measuring the bearing must be installed by the regulation combined torque tighten high temperature bearing cap bolts by the regulation, with inner scale, colonel in outside micrometer to measure after the benchmark size, measurement to avoid thinned area. Bearing inside diameter and the corresponding value is the difference between the axis neck diameter size fit clearance. Main bearing hole of the coaxial degree: main bearing hole of the alignment error is mainly the bearing hole of the alignment error, and the causes of bearing hole alignment error is the deformation of the cylinder block. When the main journal radial circular runout tolerance, check the main journal and bearing the mark, mark position together if the way the Lord high temperature bearing edible apparent inconsistency, shows poor alignment error is big, can be used for skiving, boring bearing or changing the solution to such as cylinder block, otherwise difficult to guarantee the normal work of the engine 1, before the bearing is installed, should be the first to use the appropriate measurement tools, according to the requirements of the offer bearing drawings and mechanical parameters, check the bearing hole and the processing quality, identify authenticity, such as the precision of size, shape, roughness, workmanship bearing model is used to determine whether to apply, please immediately to determine if found not match models do not pretending to be replaced, directly cause serious mechanical scrap. 2, shaft and bearing assembly on the surface of the hole, if any, burr, rust, or solid particles ( Such as debris, sand, soil) , the existence, not only make it difficult to install bearing installation position is not correct, such as high temperature bearing can fall down solid particles of abrasive, bearing rotates or bruises will wear of bearing working surface, so you must carefully check before installation, if you find these defects, should be modified. Such as use oil to remove burrs for the record, and puts forward the crocus cloth touch, rust, and Poland, if solid particles, clean dirt 3, should be used when cleaning on the surface of the installation of gasoline or xylene cleaning, can use the clean cloth, coated with ten percent thin oil, so that we can clear the hum of clean and simple. Four, open the temporary installation package high temperature bearings, it was immersed in gasoline and other liquid hand gently rotating, to ensure that the cage, rolling element and raceway, to thoroughly clean the oil level. 5, cleaning bearing, at the time of cleaning bearing should be with 90 ° to 100 ° of hot oil first melt, let packaging and chips to take off the net and tools seamlessly don't dig old oil, then pour hot a few minutes, and then with kerosene, gasoline, and then rinse clean. After cleaning, should be put on the gloves, bearing in dry clean cloth or paper on the table. 6, pay special attention to here, absolutely can't take the seal of the high temperature bearing to clean, sealed room should remain the same, not clear.