The bearing combination sets at the F33 bearing's difference with outside

The disc harrow bearing divides into two kinds, one kind is F33san the lip port contact type seal outboard bearing, one kind is 3 level of sealed bearings combination built-in bearing

First, the F33 bearing is one kind of special-purpose outside spherical surface side aperture ball bearing, in the hole is a square shape; Its original seal packing collar structure is one kind of steel skeleton three lip port serious offense full quantity contact type seal packing collar, both can prevent the bearing exterior soil, cold water entry, and can prevent the bearing interior lubricant the outflow. Because the union preparation of soil computer use conditions is quite bad, many in open-air, multi-dust, moist and in contamination conditions or water job, contacts and so on bearing and soil, fertilizer, agricultural chemicals, excrement, rotten plant and water, receives these materials the friction and the corrosive action, specially the bulk hard soil, the weed, the remnant stubble, the sand and so on will scratch seal packing collar's rubber lip, and will extrude causes its breakage, will create the bearing because of the seal failure, but will replace frequently.

Second, the bearing combination by the bearing seat, outside the spherical surface ball bearing, the side cover and bypasses is composed, uses the multiple seal structures to carry on the protection to the bearing; Special-purpose bypasses with the disc harrow bearing is the integrated structure, but prevents in the work validly the loose phenomenon. Its seal's identity is as follows:

(1) in the bearing seat side cover inside diameter with bypasses the outer diameter, the side cover flank with bypasses between the lug boss to leave leeway the small gap, the preparation of soil computer in the work process, bypasses along with square shaft revolving, the side cover is motionless, thus and between fixed forms the very small winding gap in revolving, forms the labyrinth structure, plays the primary seal role to the disc harrow bearing.

(2) has installed the oil seal in the side cover, has prevented the exterior dust, tiny sand entry, had guaranteed the bearing seat internal cleanliness, played the secondary seal role to the disc harrow bearing.

(3) outside spherical bearing own design's elastic ring, the seal packing collar double-decked seal structure, played finally the level seal role to the disc harrow bearing.

in (4) because the side cover, bypasses, the coat uses the cast iron material, degree of hardness is high, anti-bulk impact abilities and so on hard soil, remnant stubble, sand are bigger than the original structure by far.