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The inspection work is mainly to check whether the installation is specified, there is other abnormalities, etc., through checking problems in time, timely resolving, in a timely equipment such as a ball mill, the main bearing inspection work is also a critical step.
1, the distance between the base foot bolt hole, the bolt hole distance and the base height of the bearings and the base are mainly sized and checked according to the drawings.
2, the four-week contact of the main bearing and the bearing housing should be uniform. Generally, the local gap should not be greater than 0.1 mm. The main sleeve on the roller side and the base contact should not be less than 80%.
3, the ball mill on the cooling water passage for 8 minutes of water pressure test, requiring no leakage.
4, bearing alloy and spherical watts should be strict, firm, must not have defects such as shell, cracks, and air holes, especially in the 90 ° contact region.
5. The spherical watts needed to be scraped, check the contact of the spherical tile with the middacket journal. The continuous and uniform distribution contact strip is required to form a continuous and uniform distribution in the 60 ° package angle and the whole width contact area, and the contact spot should not be less than 1 point / 10 × 102 mm. The gravity static pressure bearing of the non-scratto, check the side gaps according to the drawings.
6, with the distribution area of \u200b\u200bcontact with the sprand, should be a side contact strip, the sprand spacing should not be greater than 5mm, and should be all width in the lower part of the bus shaft bus, such as only one side or only When the spot is unevenly distributed in the intermediate contact, slightly scrape, reach the above requirements.
7, the fit contacts with the spherical tiles:
(1) The circumferential contact clamp of the spherical contact strip should not be less than 45 °; the axial contact width should not be more than 1/3 of the width of the spherical seat. But not less than 10 mm.
(2) The distribution of contact spots should be uniform, and the spacing should not be more than 5mm.
There are many inspections of the main bearing, and it is further explained that the importance of the main bearing throughout the ball mill can be said to be a lot of operations. Be sure to check the main bearing repeatedly when checking some faults.
