Plastic-dipped bearing retainer

Abstract

The invention discloses a plastic-dipped bearing retainer which comprises an annular main body. Pocket holes are formed in the annular main body, the outer surface of the annular main body is coated with a plastic layer, the plastic-dipped bearing retainer further comprises auxiliary holes, and the auxiliary holes are formed in the annular main body and located between the adjacent pocket holes. The plastic layer coats the outer surface of the annular main body in which the pocket holes and the auxiliary holes are formed. The auxiliary holes are machined in the annular main body to balance the overall strength, so that when a rolling bearing rotates, centrifugal force and inertia force borne by the retainer are distributed on the overall structure in a balanced mode, the phenomenon of structural wear among the retainer, a bearing rolling body and the inner and outer rings of the bearing due to the problem of unbalanced strength after the retainer is subjected to large centrifugal force, impact and vibration is avoided, and further the negative phenomena that the wear resistance of the retainer is unbalanced due to cracking of the plastic layer, the service life of the retainer is sharply shortened, the working effect of the retainer is sharply reduced, and even the retainer is broken are avoided.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a mold-impregnated bearing retainer. Background technique [0002] At present, the surface treatment of wind power products on the market mainly includes nitriding, phosphating, and sandblasting products. Nitriding and phosphating have been criticized by people due to environmental protection issues, and these two processes have great shortcomings. If the cage adopts phosphating , Sandblasting, due to the low hardness of the material, the cage is the most vulnerable part to be damaged and worn; if the cage is hardened (nitrided), the bearing ring is the most vulnerable part to be damaged and worn, and with The increase in the hardness of the cage makes itself brittle and reduces the toughness of the product. The plasticizing product has the environmental protection factor due to the advantages of the process, and has the characteristics of wear resistance and rust resistance, t...

AI Technical Summary

Problems solved by technology

[0002] At present, the surface treatment of wind power products on the market mainly includes nitriding, phosphating, and sandblasting products. Nitriding and phosphating have been criticized by people due to environmental protection issues, and these two processes have great shortcomings. If the cage adopts phosphating , Sandblasting, due to the low hardness of the material, the cage is the most vulnerable part to be damaged and worn; if the cage is hardened (nitrided), the bearing ring is the most vulnerable part to be damaged and worn, and with The increase in the hardness of the cage makes it brittle and reduces the toughness of the product

[0003] The wear resistance of the bearing cage is the main consideration during the normal operation of wind power bearings in the prior art. The bearing cages made by the existing plasticizing process are basically bent and connected into a ring shape after the substrate is processed. Then process the pockets on the ring-shaped sheet, and then perform the dipping process after the pockets are processed, so that the outer wall of the ring-shaped sheet is attached to the plastic layer, and the wear resistance can be effectively improved under the premise of ensuring the support of the cage. After the pockets are processed on the sheet, the structural strength of the pockets is greatly reduced compared with that before the pockets, while the strength of the sheet between adjacent pockets still maintains the strength of the original annular sheet, which leads to The strength of the sheet metal near the pocket is smaller than that between the adjacent pockets, which causes the strength of the entire cage to be unbalanced. When the bearing is rotating, when the cage bears a large centrifugal force and impact After vibration and vibration, the problem of unbalanced strength will easily lead to cracking of the plastic layer, which will cause an imbalance in the wear resistance of the cage, resulting in a sharp decrease in the service life and effect of the cage. Cracking and falling off of the plastic layer will also affect the internal structure of the bearing. Exacerbating the wear during the rotation process can also easily lead to failures such as fracture of the main body of the cage, which is the main factor limiting the service life of the cage and needs to be solved urgently

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