Novel carrier roller sealing structure

Abstract

The utility model relates to the technical field of conveyor production, in particular to a novel carrier roller sealing structure. Comprising a U-shaped bearing seat, a sealing ring, an inner sealing ring, a main sealing ring and an outer sealing ring, the sealing ring is tightly attached to the inner wall of the U-shaped bearing seat and tightly attached to the outer side of a carrier roller shaft, and an annular groove is formed in the side, away from the bottom face of the U-shaped bearing seat, of the sealing ring; the carrier roller shaft is sleeved with the main sealing ring, the main sealing ring comprises a long sealing part, a fixing ring and annular bosses, and the multiple annular bosses are arranged on the fixing ring in the direction perpendicular to the radial direction; the long sealing parts of the inner sealing ring and the outer sealing ring are symmetrically arranged perpendicular to the center line in the axial direction, and annular grooves matched with the annular bosses are formed in the inner sealing ring and the outer sealing ring. A certain distance is reserved between the annular boss and the annular groove, a slender zigzag lubricating channel is formed, the structure of the labyrinth seal is improved, the water immersion performance of the carrier roller is optimized, and then the dustproof and waterproof performance under the special working condition is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of conveyor production, and particularly relates to a novel idler seal structure. Background Art

[0002] The idler is an important accessory of the belt conveyor, and its main function is to support the conveyor belt and the materials on the conveyor belt. As the core component of the belt conveyor, whether the idler can operate normally is directly related to the operating condition and quality of the belt conveyor. According to statistics, more than 90% of the reasons for the failure of the idler operation are due to the damage of the idler bearing, and the main reasons for the bearing damage include the intrusion of dust, dust and sewage and the lack of lubricating oil.

[0003] The existing idler uses a labyrinth seal to seal the gap between the U-shaped bearing seat and the idler shaft, and a retaining cover is provided at the outer end for protection. However, due to the gap between the retaining cover and the end face of the U-shaped bearing seat, the sealing groove stroke of the ordinary labyrinth seal is short. When operating in rainy and snowy weather and a working environment with severe dust, dust or rainwater will enter the inner side along this gap and gradually pass through the sealing gap of the labyrinth seal, thereby polluting the bearing lubricating grease and causing bearing damage and idler failure. Summary of the Utility Model

[0004] The utility model aims to solve the problem that the sealing groove stroke of the ordinary labyrinth seal in the prior art is short, which is easy for dust to enter, and for this purpose, a novel idler seal structure is provided.

[0005] The utility model is realized by adopting the following technical scheme: A novel idler seal structure, including a roller, an idler shaft and a bearing, U-shaped bearing seats with openings facing outward are respectively fixedly welded at both ends of the roller, and further includes:

[0006] A sealing ring, the sealing ring is closely attached to the inner wall of the U-shaped bearing seat and is closely attached to the outer side of the idler shaft, and a groove is provided on one end face of the sealing ring away from the bottom surface of the U-shaped bearing seat;

[0007] A main sealing ring, the main sealing ring is sleeved on the idler shaft, the main sealing ring includes a long sealing part, a fixing ring and an annular boss, the fixing ring is vertically arranged at the outer edge of the long sealing part, and a plurality of annular bosses are vertically arranged in the radial direction perpendicular to the fixing ring;

[0008] An inner sealing ring and an outer sealing ring are symmetrically arranged along the center line of the long sealing part perpendicular to the axial direction, a plurality of annular grooves adapted to the annular bosses are provided on the inner sealing ring and the outer sealing ring, and a spacing is provided between the annular grooves and the annular bosses;

[0009] The long sealing part is closely attached to the idler shaft, and the inner sealing ring and the outer sealing ring are closely attached to the inner wall of the U-shaped bearing seat;

[0010] The sealing disc is sleeved on the idler shaft, and the sealing disc seals and shields the main sealing ring and the outer sealing ring on the side close to the opening of the U-shaped bearing seat.

[0011] Optionally, an inner retaining ring is further arranged on one side of the sealing disc. An outer retaining ring is assembled on the side of the inner retaining ring away from the idler shaft. The outer retaining ring is clamped outside the sealing disc and forms an outer ring cavity with the sealing disc. A notch is arranged on the outer sealing ring. One end of the outer retaining ring is inserted into the notch, and an inner ring cavity is formed between the outer sealing ring and the sealing disc.

[0012] Optionally, a gap is arranged between the sealing disc and the idler shaft. The outer side wall of the inner retaining ring is closely attached to the idler shaft. The inner retaining ring is of an annular groove structure. The top of the sealing disc is arranged inside the inner retaining ring, and the side wall of the inner retaining ring is clamped in the gap.

[0013] Optionally, one end of the outer retaining ring is bent and clamped inside the inner retaining ring. The middle part of the outer retaining ring is inclined upward to the inner wall of the U-shaped bearing seat and then bent, and is inserted into the notch along the inner wall of the U-shaped bearing seat.

[0014] Optionally, a baffle is further arranged on the side of the inner retaining ring away from the bottom of the U-shaped bearing seat. The baffle is clamped at the groove of the idler shaft, and the radial cross-sectional width of the baffle is greater than that of the inner retaining ring.

[0015] Optionally, there are two groups of the annular bosses.

[0016] Optionally, an arc-shaped groove is arranged on the sealing disc. One end of the long sealing part is arranged in the arc-shaped groove, and the other end is closely attached to the bearing.

[0017] The beneficial effects of the present utility model:

[0018] In the present utility model, the inner sealing ring, the main sealing ring, and the outer sealing ring are assembled in sequence. There is a certain distance between the annular boss and the annular groove, forming a slender and tortuous lubrication channel. The non-contact inner and outer sealing rings composed of multiple labyrinths. The non-contact of the inner and outer sealing rings can ensure that the idler rotates flexibly with small rotational resistance, improve the structure of the labyrinth seal, optimize the water immersion performance of the idler, and further achieve the purpose of improving the dust and water protection performance under special working conditions and increasing the overall service life. The sealing disc shields the gaps that can enter dust and water, avoiding bearing damage and having good sealing performance. Description of the Drawings

[0019] Figure 1 is the overall schematic diagram of a new idler seal structure of the present utility model applied to an idler;

[0020] Figure 2 is the enlarged detailed schematic diagram of a new idler seal structure of the present utility model;

[0021] Figure 3 It is a schematic diagram of the inner sealing ring of a new type of idler sealing structure of the present utility model;

[0022] Figure 4 It is a schematic diagram of the king-shaped sealing ring of a new type of idler sealing structure of the present utility model;

[0023] Figure 5 It is a schematic diagram of the outer sealing ring of a new type of idler sealing structure of the present utility model;

[0024] Figure 6 It is a schematic diagram of the sealing disc of a new type of idler sealing structure of the present utility model;

[0025] 1. U-shaped bearing seat; 2. Roller; 3. Sealing ring; 4. Bearing; 5. Inner sealing ring; 6. Main sealing ring; 7. Outer sealing ring; 8. Inner retaining ring; 9. Outer retaining ring; 10. Baffle; 11. Sealing disc; 12. Idler shaft; 13. Annular boss; 14. Annular groove; 15. Annular recess; 16. Long sealing part; 17. Fixed ring; 18. Arc-shaped groove. Specific implementation manner

[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0027] This embodiment provides a new type of idler sealing structure, as Figure 1 shown, which includes a roller 2, an idler shaft 12 and a bearing 4. U-shaped bearing seats 1 with openings facing outward are fixedly welded to both ends of the roller 2, as Figures 1-4As shown in the figure, on this basis, it further includes a sealing ring 3, a main sealing ring 6, an inner sealing ring 5, an outer sealing ring 7, and a sealing disc 11. Among them, the sealing ring 3 is closely attached to the inner wall of the U-shaped bearing seat 1 and is in close fit with the outer side of the idler shaft 12. A groove is provided on one side of the sealing ring 3 away from the bottom surface of the U-shaped bearing seat 1; the main sealing ring 6 is sleeved on the idler shaft 12. The main sealing ring 6 includes a long sealing portion 16, a fixing ring 17, and an annular boss 13. The long sealing portion 16 is in close fit with the idler shaft 12. A fixing ring 17 is vertically provided at the outer edge of the long sealing portion 16. A plurality of annular bosses 13 are provided perpendicular to the radial direction of the fixing ring 17; the inner sealing ring 5 and the outer sealing ring 7 are symmetrically arranged along the center line perpendicular to the axial direction of the long sealing portion 16. A plurality of annular grooves 15 adapted to the annular bosses 13 are provided on the inner sealing ring 5 and the outer sealing ring 7. There is a spacing between the annular groove 15 and the annular boss 13. An annular groove 14 is also provided on the outer sealing ring 7, which is communicated with the zigzag channel to form an integral body. The long sealing portion 16 is in close fit with the idler shaft 12. The inner sealing ring 5 and the outer sealing ring 7 are in close fit with the inner wall of the U-shaped bearing seat 1. The sealing disc 11 is sleeved on the idler shaft 12. The sealing disc 11 seals and shields the main sealing ring 6 and the outer sealing ring 7 near the opening side of the U-shaped bearing seat 1.

[0028] Specifically, at least two groups of annular bosses 13 are provided. A narrow "corridor" is formed between the annular boss 13 and the annular groove 15 for storing lubricating oil and preventing moisture from entering the inside of the roller, which affects the performance of the roller.

[0029] Among them, an arc-shaped groove 18 is provided on the sealing disc 11. One end of the long sealing portion 16 is arranged in the arc-shaped groove 18, and the other end is in close fit with the bearing 4.

[0030] As Figure 2 shown, an inner retaining ring 8 is also provided on one side of the sealing disc 11. An outer retaining ring 9 is assembled on the side of the inner retaining ring 8 away from the idler shaft 12. The outer retaining ring 9 is held around the outside of the sealing disc 11 and forms an outer ring cavity with the sealing disc 11. A notch is provided on the outer sealing ring 7. One end of the outer retaining ring 9 is inserted into the notch. An inner ring cavity is formed between the outer sealing ring 7 and the sealing disc 11.

[0031] The specific structure of the outer retaining ring 9 is: one end of the outer retaining ring 9 is bent and clamped inside the inner retaining ring 8. The middle part of the outer retaining ring 9 is inclined upward to the inner wall of the U-shaped bearing seat 1 and then bent, and is inserted into the notch along the inner wall of the U-shaped bearing seat 1. The bending and clamping inside the inner retaining ring 8 and the notch ensure the stable installation of the outer retaining ring. Since the bending is in the direction of admitting dust, a groove is formed, which can make part of the dust and water stagnate on the outside and is easy to clean, and will not affect the bearing 4.

[0032] On the basis of the above-described embodiments, in a preferred embodiment, a gap is provided between the sealing disc 11 and the idler shaft 12. The outer side wall of the inner retaining ring 8 is in close contact with the idler shaft 12. The inner retaining ring 8 is of an annular groove structure. The top of the sealing disc 11 is arranged inside the inner retaining ring 8, and the side wall of the inner retaining ring 8 is clamped in the gap.

[0033] On the basis of the above-described embodiments, in a preferred embodiment, a baffle 10 is further provided at the top of the inner retaining ring. The baffle 10 is clamped at the groove of the idler shaft 12. The radial cross-sectional width of the baffle 10 is greater than the radial cross-sectional width of the inner retaining ring 8, which can effectively ensure the positioning of the bearing 4 and the idler shaft 12, eliminate the axial movement of the idler shaft 12, and improve the axial load-bearing capacity of the idler.

[0034] The specific installation method is as follows: The sealing ring 3 is closely attached to the inner wall of the U-shaped bearing seat 1 and is in close contact with the outer side of the idler shaft 12. Then, the bearing 4 is pressed on the sealing ring 3, and is in close contact with the idler shaft 12 and the U-shaped bearing seat 1 respectively inside and outside. Next, the inner sealing ring 5, the main sealing ring 6, and the outer sealing ring 7 are assembled in sequence, and are in close contact with the inner wall of the U-shaped bearing seat 1 and the outer side of the idler shaft 12, and are staggeredly attached to form a slender zigzag lubrication channel. The bearing 4 is a deep groove ball bearing, the outer side is clamped by the sealing ring 3 and the inner sealing ring 5, the inner side is free on one side and restricted by the main sealing ring 6 on the other side. Then, the sealing disc 11, the inner retaining ring 8, and the outer retaining ring 9 are installed in sequence. Finally, the baffle 10 is clamped at the groove of the idler shaft 12 to restrict the positions of the internal lubricating components.

[0035] There are many factors affecting the quality and qualification rate of idlers. The water immersion performance is exactly one of the most important and most difficult-to-control factors. After applying the solution of this embodiment, the qualification rate of the property of the water immersion performance of the idler can be effectively improved. It is beneficial for the idler to adapt to a more severe use environment, extend the service life of the idler, and thus increase the service life of the entire conveyor.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel idler seal structure, comprising a roller (2), an idler shaft (12) and a bearing (4). At both ends of the roller (2), U-shaped bearing seats (1) with openings facing outward are fixedly welded respectively, and it is characterized in that, It further includes: A sealing ring (3), the sealing ring (3) is closely attached to the inner wall of the U-shaped bearing seat (1) and is in close fit with the outer side of the idler shaft (12). A groove is provided on one end face of the sealing ring (3) away from the bottom surface of the U-shaped bearing seat (1); A main sealing ring (6), the main sealing ring (6) is sleeved on the idler shaft (12). The main sealing ring (6) includes a long sealing part (16), a fixing ring (17) and an annular boss (13). A fixing ring (17) is vertically provided at the outer edge of the long sealing part (16), and a plurality of annular bosses (13) are vertically arranged in the radial direction perpendicular to the fixing ring (17); An inner sealing ring (5) and an outer sealing ring (7) are symmetrically arranged along the center line of the long sealing part (16) perpendicular to the axial direction. A plurality of annular grooves (15) adapted to the annular bosses (13) are provided on the inner sealing ring (5) and the outer sealing ring (7). A gap is provided between the annular groove (15) and the annular boss (13); The long sealing part (16) is in close fit with the idler shaft (12), and the inner sealing ring (5) and the outer sealing ring (7) are in close fit with the inner wall of the U-shaped bearing seat (1); A sealing disc (11), sleeved on the idler shaft (12), and the sealing disc (11) seals and shields the main sealing ring (6) and the outer sealing ring (7) close to the opening side of the U-shaped bearing seat (1).

2. A novel idler seal structure according to claim 1, characterized in that, An inner retaining ring (8) is further provided on one side of the sealing disc (11). An outer retaining ring (9) is assembled on the side of the inner retaining ring (8) away from the idler shaft (12). The outer retaining ring (9) is held around the outside of the sealing disc (11) and forms an outer ring cavity with the sealing disc (11). A notch is provided on the outer sealing ring (7), and one end of the outer retaining ring (9) is inserted into the notch, and an inner ring cavity is formed between the outer sealing ring (7) and the sealing disc (11).

3. A novel idler seal structure according to claim 1, characterized in that, A gap is provided between the sealing disc (11) and the idler shaft (12). The outer side wall of the inner retaining ring (8) is in close fit with the idler shaft (12). The inner retaining ring (8) is of an annular groove structure. The top of the sealing disc (11) is arranged inside the inner retaining ring (8), and the side wall of the inner retaining ring (8) is clamped in the gap.

4. A novel idler seal structure according to claim 3, characterized in that, One end of the outer retaining ring (9) is bent and clamped inside the inner retaining ring (8). The middle part of the outer retaining ring (9) is inclined upwards to the inner wall of the U-shaped bearing seat (1) and then bent, and is inserted into the notch along the inner wall of the U-shaped bearing seat (1).

5. A novel idler seal structure according to claim 4, characterized in that, A baffle (10) is further provided on the side of the inner retaining ring (8) away from the bottom of the U-shaped bearing seat (1). The baffle (10) is clamped at the groove of the idler shaft (12), and the radial cross-sectional width of the baffle (10) is greater than the radial cross-sectional width of the inner retaining ring (8).

6. A novel idler seal structure according to claim 1, characterized in that, There are two groups of the annular bosses (13).

7. A novel idler seal structure according to claim 3, characterized in that, An arc-shaped groove (18) is provided on the sealing disc (11). One end of the long sealing part (16) is arranged in the arc-shaped groove (18), and the other end is in close fit with the bearing (4).

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