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CN-117142001-B - Bearing roller seal structure

CN117142001BCN 117142001 BCN117142001 BCN 117142001BCN-117142001-B

Abstract

The invention discloses a carrier roller sealing structure which is applied between the inner wall of a bearing chamber of a carrier roller and a carrier roller shaft, is arranged at the outer side of the bearing, and comprises an outer sealing ring I, an inner sealing ring II and a sealing check ring, wherein the inner sealing ring I is sleeved on the carrier roller shaft, a plurality of coaxial annular bosses are respectively arranged on the inner side wall and the outer side wall of the inner sealing ring II, the outer sealing ring I and the outer sealing ring II are coaxially clamped on the inner wall of the bearing chamber and are respectively positioned at the inner side and the outer side of the inner sealing ring, the outer sealing ring I and the outer sealing ring II face the inner sealing ring to be provided with annular grooves matched with the annular bosses, and the sealing check ring is coaxially assembled on the carrier roller shaft and can seal and shield the outer end face of the outer sealing ring. According to the carrier roller sealing structure, the labyrinth sealing mode is improved, so that the stroke of the sealing groove is prolonged, and the dustproof and waterproof effects are improved.

Inventors

  • XIE LIWEN

Assignees

  • 蠡县力臣输送机械制造有限公司

Dates

Publication Date
20260508
Application Date
20231011

Claims (3)

  1. 1. The carrier roller sealing structure is applied between the inner wall of a bearing chamber (201) of a carrier roller and a carrier roller shaft (4) and is arranged at the outer side of the bearing (3), and is characterized by comprising an outer sealing ring I (5), an inner sealing ring (6), an outer sealing ring II (7) and a sealing check ring (8), wherein the inner sealing ring (6) is sleeved on the carrier roller shaft (4), a plurality of coaxial annular bosses (11) are respectively arranged on the inner side wall and the outer side wall of the inner sealing ring (6), the outer sealing ring I (5) and the outer sealing ring II (7) are coaxially clamped on the inner wall of the bearing chamber (201) and are respectively positioned at the inner side and the outer side of the inner sealing ring (6), the outer sealing ring I (5) and the outer sealing ring II (7) are provided with annular grooves matched with the annular bosses (11) towards the inner sealing ring (6), and the sealing check ring (8) is coaxially arranged on the carrier roller shaft (4) and can seal and shelter the outer end face of the outer sealing ring II (7); The inner ring of the second outer sealing ring (7) is an inverted N-shaped section ring (10), the N-shaped section ring (10) is connected with the outer sleeve of the second outer sealing ring (7) through a centrally arranged ring plate, and the opening of the N-shaped section ring (10) faces one annular boss (11) of the inner sealing ring (6); The gap between the sealing grooves on the two sides of the N-shaped section ring (10) is larger than the foldback type sealing groove between the first outer sealing ring (5) and the first inner sealing ring (6), and in the process that the carrier roller cylinder (1) rotates with the end sealing plate, the second outer sealing ring (7) and the first outer sealing ring (5) rotate along with each other, the gap between the sealing grooves on the inner side is small, the generated wind pressure is large, the wind pressure on the outer side is small, and the entering resistance of dust and water is gradually increased.
  2. 2. The carrier roller sealing structure according to claim 1, wherein the inner end of the outer sleeve of the first outer sealing ring (5) is abutted against the outer ring of the bearing (3), the inner end of the outer sleeve of the second outer sealing ring (7) is connected with the outer end of the outer sleeve of the first outer sealing ring (5) through an annular step, the inner end of the inner sleeve of the inner sealing ring (6) is abutted against the inner ring of the bearing (3), the outer end of the inner sleeve of the inner sealing ring (6) is connected with the inner sleeve of the sealing ring (8) through an annular step, and the inner sealing ring (6) is limited on the carrier roller shaft (4) through an elastic retainer ring (9) for the shaft.
  3. 3. The carrier roller sealing structure according to claim 1, wherein the outer wall of the cross section of the sealing retainer ring (8) is in a convex arc shape, the outer end of the outer sealing ring II (7) is provided with an outward flanging, the cross section of the flanging is in a convex arc shape, and the outer edge of the flanging is buckled on the outer end face of the end sealing plate (2).

Description

Bearing roller seal structure Technical Field The invention relates to the technical field of conveyer belt carrier roller production, in particular to a carrier roller sealing structure. Background The carrier roller is an important accessory of the belt conveyor, and the main function of the carrier roller is to support the conveyor belt and materials on the conveyor belt. The carrier roller is used as a core component of the belt conveyor, and whether the carrier roller normally operates is directly related to the operation condition and the operation quality of the belt conveyor. According to statistics, more than 90% of reasons for failure of the carrier roller operation are due to damage to the carrier roller bearings, and main reasons for bearing damage include invasion of dust, dust and sewage and loss of lubricating oil. The existing carrier roller adopts a labyrinth sealing piece to seal the gap between the bearing seat and the carrier roller shaft, and a retaining cover is arranged at the outer end for protection. However, the seal groove stroke of the conventional labyrinth seal is short due to the clearance existing between the flap and the end face of the bearing housing. When working in severe rainy and snowy weather and dust-raising working environment, dust or rainwater can enter the inner side along the gap and gradually pass through the sealing gap of the labyrinth sealing piece, so that bearing lubricating grease is polluted, bearing damage is caused, and the carrier roller fails. Therefore, there is a need to develop a carrier roller sealing structure to enhance dust and water proofing effects. Disclosure of Invention The invention aims to provide a carrier roller sealing structure, which prolongs the stroke of a sealing groove and improves the dustproof and waterproof effects by improving a labyrinth sealing mode. In order to solve the technical problems, the invention adopts the following technical scheme: The invention discloses a carrier roller sealing structure, which is applied between the inner wall of a bearing chamber of a carrier roller and a carrier roller shaft, is arranged at the outer side of the bearing, and comprises an outer sealing ring I, an inner sealing ring II and a sealing check ring, wherein the inner sealing ring I is sleeved on the carrier roller shaft, a plurality of coaxial annular bosses are respectively arranged on the inner side wall and the outer side wall of the inner sealing ring II, the outer sealing ring I and the outer sealing ring II are coaxially clamped on the inner wall of the bearing chamber and are respectively positioned at the inner side and the outer side of the inner sealing ring, the outer sealing ring I and the outer sealing ring II face the inner sealing ring to be provided with annular grooves matched with the annular bosses, and the sealing check ring is coaxially assembled on the carrier roller shaft and can seal and shield the outer end face of the outer sealing ring. Furthermore, the second inner ring of the outer sealing ring is an inverted N-shaped section ring, the N-shaped section ring is connected with the outer sleeve of the second outer sealing ring through a ring plate, an opening of the N-shaped section ring faces one annular boss of the inner sealing ring, and the sealing retainer rings are buckled on the outer end face of the N-shaped section ring along with the shape at equal intervals. The inner end of the inner sleeve of the inner sealing ring is abutted to the inner sleeve of the bearing, the outer end of the inner sleeve of the inner sealing ring is connected with the inner sleeve of the sealing ring through an annular step, and the inner sealing ring is limited on the roller shaft through an elastic retainer ring for a shaft. Further, the outer wall of the cross section of the sealing retainer ring is in a convex arc shape, the outer end of the outer sealing ring is provided with an outward flanging, and the flanging cross section is in a convex arc shape and the outer edge of the flanging cross section is buckled on the outer end face of the end sealing plate. Furthermore, the gap between the sealing grooves on the two sides of the N-shaped section ring is larger than the foldback type sealing groove between the first outer sealing ring and the inner sealing ring. Compared with the prior art, the invention has the beneficial technical effects that: According to the carrier roller sealing structure, two labyrinth seals are formed at two sides of the inner sealing ring through the arrangement of the first outer sealing ring and the second outer sealing ring, and the second outer sealing ring and the sealing retainer ring form a third labyrinth seal, so that the stroke of the sealing groove is greatly increased, the dustproof and waterproof effects are improved, and the entering channels of water and dust can be blocked through filling lubricating grease into the sealing groove. In addition, through setting up N type