A carrier roller sealing structure

Abstract

The application discloses a kind of carrier roller sealing structure, apply between the inner wall of bearing chamber of carrier roller and carrier roller axle, and it is set in bearing outside, including outer sealing ring one, inner sealing ring, outer sealing ring two and sealing baffle ring, the inner sealing ring is sleeved on carrier roller axle, and the inner and outer two side walls of the inner sealing ring are respectively provided with multiple coaxial annular bosses;Outer sealing ring one and outer sealing ring two coaxially are clamped on the inner wall of bearing chamber and respectively located at the inside and outside of the inner sealing ring, and outer sealing ring one and outer sealing ring two are provided with annular groove matched with the annular boss towards the inner sealing ring;The sealing baffle ring is coaxially assembled on the carrier roller axle and can seal the outer end surface of outer sealing ring two and shield it.The carrier roller sealing structure of the application improves the labyrinth sealing form, prolongs the sealing groove stroke, and improves the dustproof and waterproof effect.

Description

Technical Field

[0001] This invention relates to the field of conveyor belt idler manufacturing technology, and in particular to an idler sealing structure. Background Technology

[0002] Idler rollers are crucial components of belt conveyors, primarily functioning to support the conveyor belt and the materials on it. As a core component of belt conveyors, the proper functioning of idlers directly impacts the conveyor's operational status and quality. Statistics show that over 90% of idler roller failures are due to bearing damage, mainly caused by dust, pollutants, and wastewater intrusion, as well as insufficient lubrication.

[0003] Existing idler rollers use labyrinth seals to seal the gap between the bearing housing and the roller shaft, with a protective cover at the outer end. However, due to the gap between the cover and the bearing housing end face, the sealing groove stroke of ordinary labyrinth seals is short. In rainy, snowy, or dusty working environments, dust or rainwater can enter the inner side along this gap and gradually pass through the sealing gap of the labyrinth seal, thus contaminating the bearing lubricating grease, causing bearing damage, and ultimately roller failure.

[0004] Therefore, it is necessary to develop a roller sealing structure to enhance dustproof and waterproof performance. Summary of the Invention

[0005] The purpose of this invention is to provide a roller sealing structure that, by improving the labyrinth seal form, extends the sealing groove stroke and improves the dustproof and waterproof effect.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This invention discloses a roller sealing structure applied between the inner wall of the bearing chamber and the roller shaft, and disposed on the outer side of the bearing. It includes an outer sealing ring one, an inner sealing ring, an outer sealing ring two, and a sealing retainer ring. The inner sealing ring is fitted onto the roller shaft, and multiple coaxial annular bosses are respectively provided on its inner and outer sidewalls. The outer sealing ring one and outer sealing ring two are coaxially mounted on the inner wall of the bearing chamber and are located on the inner and outer sides of the inner sealing ring, respectively. The outer sealing ring one and outer sealing ring two have annular grooves facing the inner sealing ring that mate with the annular bosses. The sealing retainer ring is coaxially mounted on the roller shaft and can seal and shield the outer end face of the outer sealing ring two.

[0008] Furthermore, the inner ring of the second outer sealing ring is an inverted N-shaped cross-section ring, and the N-shaped cross-section ring and the outer sleeve of the second outer sealing ring are connected by a ring plate. The opening of the N-shaped cross-section ring faces one of the annular bosses of the inner sealing ring. The sealing retaining ring is equidistantly fastened to the outer end face of the N-shaped cross-section ring.

[0009] Furthermore, the inner end of the outer sleeve of the first outer sealing ring abuts against the outer ring of the bearing, and the inner ends of the outer sleeves of the second outer sealing ring and the outer ends of the outer sleeves of the first outer sealing ring are connected together by an annular step; the inner end of the inner sleeve of the inner sealing ring abuts against the inner ring of the bearing, and the outer end of the inner sleeve of the inner sealing ring is connected to the inner sleeve of the sealing retaining ring by an annular step; the inner sealing ring is limited on the idler roller shaft by a shaft elastic retaining ring.

[0010] Furthermore, the outer wall of the sealing ring section is convex arc-shaped, and the outer ends of the outer sealing ring are provided with outward flanges. The flange section is convex arc-shaped and its outer edge is fastened to the outer end face of the end sealing plate.

[0011] Furthermore, the gap between the sealing grooves on both sides of the N-shaped cross-section ring is larger than the folded sealing groove between the outer sealing ring and the inner sealing ring.

[0012] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0013] This invention discloses a roller sealing structure. By setting an outer sealing ring one and an outer sealing ring two together on both sides of an inner sealing ring to form two labyrinth seals, and an outer sealing ring two and a sealing retainer ring to form a third labyrinth seal, the travel of the sealing groove is greatly increased, and the dustproof and waterproof effects are improved. By filling the sealing groove with lubricating grease, the entry channels of water and dust can be blocked.

[0014] Furthermore, by setting an N-shaped cross-section ring inside the second outer sealing ring, the width difference of the N-shaped cross-section ring along the axis of the idler roller is greater than that of the inner labyrinth seal groove, resulting in good sealing performance. The second outer sealing ring and the first outer sealing ring are connected by an annular step, ensuring good coaxiality and uniform gaps in the sealing grooves to prevent scraping. By setting the exposed outer end faces of both the sealing retainer ring and the second outer sealing ring to a convex arc shape, they can effectively disturb airflow and block moisture, reducing the initial velocity of dust entering from the outside. By setting the gap of the inner labyrinth seal groove to be smaller than that of the outer seal groove, as the idler roller rotates with the end sealing plate, the second and first outer sealing rings rotate accordingly. The smaller gap in the inner seal groove generates higher wind pressure, while the smaller gap on the outer side generates lower wind pressure, gradually increasing the resistance to dust and water entry and providing superior protection. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a cross-sectional view of the roller sealing structure of the present invention;

[0017] Figure 2 for Figure 2 A magnified schematic diagram of part A in the diagram.

[0018] Explanation of reference numerals in the attached drawings: 1. Idler roller; 2. End sealing plate; 201. Bearing chamber; 3. Bearing; 4. Idler roller shaft; 5. Outer sealing ring one; 6. Inner sealing ring; 7. Outer sealing ring two; 8. Sealing retainer ring; 9. Shaft elastic retainer ring; 10. N-type cross-section ring; 11. Annular boss. Detailed Implementation

[0019] The core of this invention is to provide a roller sealing structure that improves the dustproof and waterproof effect by extending the sealing groove stroke through an improved labyrinth seal.

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] In one specific implementation, such as Figure 1 and Figure 2As shown, in a typical idler roller structure, an end sealing plate 2 is welded to the end of the idler roller cylinder 1. The inner ring of the end sealing plate 2 is recessed inward to form a bearing chamber 201, and a bearing 3 and a sealing structure are installed inside the bearing chamber 201. The idler roller sealing structure of this invention is applied between the inner wall of the bearing chamber 201 and the idler roller shaft 4, and is located outside the bearing 3. It includes an outer sealing ring 5, an inner sealing ring 6, an outer sealing ring 7, and a sealing retainer ring 8. The inner sleeve of the inner sealing ring 6 is interference-fitted onto the idler roller shaft 4. Multiple coaxial annular bosses 11 are respectively provided on the inner and outer side walls of the radial vertical wall of the inner sealing ring 6. The outer sleeves of the outer sealing rings 5 ​​and 7 are coaxially interference-fitted onto the inner wall of the bearing chamber 201. The outer sealing rings 5 ​​and 7 are located inside and outside the inner sealing ring 6, respectively. The outer sealing rings 5 ​​and 7 have annular grooves that mate with the annular bosses 11 on the side facing the inner sealing ring 6, forming a sealing groove between them. The sealing ring 8 is coaxially mounted on the idler roller shaft 4 and can seal and shield the outer end face of the outer sealing ring 7. A gap is left between the sealing ring 8 and the outer end face of the outer sealing ring 7, and the inner end of this gap connects to the sealing groove. In actual operation, when lubricating grease is added to the bearing 3, the grease overflows outward and passes through the reciprocating sealing groove, filling the sealing groove with lubricating grease, which can improve the dustproof and waterproof effect.

[0023] By combining outer sealing ring 1 5 and outer sealing ring 2 7 on both sides of inner sealing ring 6 to form two labyrinth seals, and outer sealing ring 2 7 and sealing retainer ring 8 to form a third labyrinth seal, the stroke of the sealing groove is greatly increased, improving the dustproof and waterproof effect; by filling the sealing groove with lubricating grease, the entry channels of water and dust can be blocked.

[0024] In one specific embodiment of the present invention, such as Figure 2 As shown, the inner ring of the second outer sealing ring 7 is an inverted N-shaped cross-section ring 10. The N-shaped cross-section ring 10 and the outer sleeve of the second outer sealing ring 7 are fixedly connected by a radial ring plate. The opening of the N-shaped cross-section ring 10 faces an annular boss 11 of the inner sealing ring 6. The sealing retaining rings 8 are equidistantly fastened to the outer end face of the N-shaped cross-section ring 10. The width of the N-shaped cross-section ring 10 is greater than the width of the folded sealing groove between the inner outer sealing ring 5 and the inner sealing ring 6.

[0025] Specifically, such as Figure 2 As shown, the inner end of the outer sleeve of outer seal ring 5 abuts against the outer ring of bearing 3. The inner end of the outer sleeve of outer seal ring 7 and the outer end of the outer sleeve of outer seal ring 5 are connected together by an annular step. The inner end of the inner sleeve of inner seal ring 6 abuts against the inner ring of bearing 3. The outer end of the inner sleeve of inner seal ring 6 is connected to the inner sleeve of sealing retaining ring 8 by an annular step. Inner seal ring 6 is limited on idler roller shaft 4 by axial elastic retaining ring 9.

[0026] By setting an N-shaped cross-section ring 10 inside the outer sealing ring 2 7, the width difference of the N-shaped cross-section ring 10 along the axis of the idler roller shaft 4 is greater than that of the inner labyrinth sealing groove, resulting in good sealing performance. The outer sealing ring 2 7 and the outer sealing ring 1 5 are connected together by an annular step, ensuring good coaxiality and guaranteeing that the gap of the sealing groove is uniform and consistent, preventing scratching.

[0027] In one specific embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the outer wall of the sealing ring 8 is convex arc-shaped, and the outer end of the outer sealing ring 7 is provided with an outward flange. The outer wall of the flange section is convex arc-shaped and its outer edge is fastened to the outer end face of the end sealing plate 2.

[0028] By setting the exposed outer end faces of both the sealing ring 8 and the outer sealing ring 7 to a convex arc shape, the airflow can be disturbed and moisture can be blocked, reducing the initial speed at which dust enters from the outside.

[0029] In one specific embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the gap between the sealing grooves on both sides of the N-type cross-section ring 10 is larger than the folded sealing groove between the outer sealing ring 5 and the inner sealing ring 6.

[0030] By setting the gap of the inner labyrinth seal groove to be smaller than that of the outer seal groove, as the roller 1 rotates with the end sealing plate, the outer sealing ring 2 7 and the outer sealing ring 1 5 rotate with it. The smaller gap of the inner seal groove generates greater wind pressure, while the smaller gap of the outer seal groove generates less wind pressure. The resistance to the entry of dust and water gradually increases, resulting in better protection.

[0031] The roller sealing structure of this invention forms two labyrinth seals on both sides of the inner sealing ring 6 by combining an outer sealing ring 1 5 and an outer sealing ring 2 7. The outer sealing ring 2 7 and the sealing retainer ring 8 then form a third labyrinth seal, greatly increasing the travel of the sealing groove and improving dustproof and waterproof effects. Filling the sealing groove with lubricating grease can block the entry channels of water and dust. Furthermore, by setting an N-shaped cross-section ring 10 inside the outer sealing ring 2 7, the width difference of the N-shaped cross-section ring 10 along the axis of the roller shaft 4 is greater than that of the inner labyrinth sealing groove, resulting in good sealing performance. The outer sealing ring 2 7 and outer sealing ring 1 5, connected by an annular step, have good coaxiality, ensuring uniform and consistent gaps in the sealing grooves and preventing scraping. By setting the exposed outer end faces of the sealing retainer ring 8 and outer sealing ring 2 7 to a convex arc shape, they can disturb airflow and block moisture, reducing the initial velocity of dust entering from the outside. By setting the gap of the inner labyrinth seal groove to be smaller than that of the outer seal groove, as the roller 1 rotates with the end sealing plate, the outer sealing ring 2 7 and the outer sealing ring 1 5 rotate with it. The smaller gap of the inner seal groove generates greater wind pressure, while the smaller gap of the outer seal groove generates less wind pressure. The resistance to the entry of dust and water gradually increases, resulting in better protection.

[0032] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0033] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A roller sealing structure, applied between the inner wall of the bearing chamber (201) of the roller and the roller shaft (4), and disposed on the outside of the bearing (3), characterized in that, The assembly includes an outer sealing ring 1 (5), an inner sealing ring (6), an outer sealing ring 2 (7), and a sealing retainer ring (8). The inner sealing ring (6) is fitted onto the idler roller shaft (4), and multiple coaxial annular bosses (11) are respectively provided on the inner and outer side walls of the inner sealing ring (6). The outer sealing ring 1 (5) and the outer sealing ring 2 (7) are coaxially mounted on the inner wall of the bearing chamber (201) and are located on the inner and outer sides of the inner sealing ring (6), respectively. The outer sealing ring 1 (5) and the outer sealing ring 2 (7) are provided with annular grooves that cooperate with the annular bosses (11) facing the inner sealing ring (6). The sealing retainer ring (8) is coaxially mounted on the idler roller shaft (4) and can seal and shield the outer end face of the outer sealing ring 2 (7). The inner ring of the second outer sealing ring (7) is an inverted N-shaped cross-section ring (10). The N-shaped cross-section ring (10) and the outer sleeve of the second outer sealing ring (7) are connected by a centrally located ring plate. The opening of the N-shaped cross-section ring (10) faces one of the annular bosses (11) of the inner sealing ring (6). The sealing retaining ring (8) is equidistantly fastened to the outer end face of the N-shaped cross-section ring (10). The gap between the sealing grooves on both sides of the N-shaped cross-section ring (10) is larger than the folded sealing groove between the outer sealing ring (5) and the inner sealing ring (6); during the rotation of the roller (1) with the end sealing plate, the outer sealing ring (7) and the outer sealing ring (5) rotate together. The air pressure generated by the small gap of the inner sealing groove is large, while the air pressure on the outer side is small, and the resistance to the entry of dust and water gradually increases.

2. The roller sealing structure according to claim 1, characterized in that: The inner end of the outer sleeve of the first outer sealing ring (5) abuts against the outer ring of the bearing (3). The inner end of the outer sleeve of the second outer sealing ring (7) and the outer end of the outer sleeve of the first outer sealing ring (5) are connected together by an annular step. The inner end of the inner sleeve of the inner sealing ring (6) abuts against the inner ring of the bearing (3). The outer end of the inner sleeve of the inner sealing ring (6) is connected to the inner sleeve of the sealing retainer ring (8) by an annular step. The inner sealing ring (6) is limited on the idler roller shaft (4) by the axial elastic retainer ring (9).

3. The roller sealing structure according to claim 1, characterized in that: The outer wall of the sealing ring (8) is convex arc-shaped, and the outer end of the outer sealing ring (7) is provided with an outward flange. The flange cross section is convex arc-shaped and its outer edge is fastened to the outer end face of the end sealing plate (2).

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