Three-labyrinth-seal carrier roller

Abstract

The utility model discloses a carrier roller with three labyrinth seals. The carrier roller comprises a roller body and a bearing seat arranged in the roller body. The bearing is arranged in an inner cavity of the bearing seat; the shaft is arranged in the bearing in a penetrating manner; the check ring is arranged on the outer side of the bearing seat, and the check ring is arranged on the shaft in a sleeving mode; the baffle ring is arranged on the inner side of the bearing seat, and the sealing assembly is arranged between the baffle ring and the bearing; the sealing assembly comprises a first static sealing ring, a first movable sealing ring, a second static sealing ring and a second movable sealing ring which are sequentially arranged from the check ring to the bearing, the first static sealing ring and the second static sealing ring are fixed to the shaft, and the first movable sealing ring and the second movable sealing ring are fixed to the bearing seat and rotate synchronously. A first sealing labyrinth is formed between the first static sealing ring and the first movable sealing ring, a second sealing labyrinth is formed between the first movable sealing ring and the second static sealing ring, a third sealing labyrinth is formed between the second static sealing ring and the second movable sealing ring, and the sealing effect can be greatly improved through three labyrinth seals formed through matching.

Description

Technical Field

[0001] The utility model relates to the technical field of belt conveyor rollers, in particular to a three-pass labyrinth sealing roller. Background Art

[0002] Rollers are a crucial component of belt conveyors, coming in numerous varieties and quantities to support the weight of the conveyor belt and material. They account for 35% of a belt conveyor's total cost and generate over 70% of the drag, making their quality crucial. Their role is to support the weight of the conveyor belt and material, and their operation must be flexible and reliable.

[0003] Important performance indicators for rollers include radial runout, axial play, dustproofing, watertightness, and rotational resistance. Seals are a crucial component of rollers and are primarily provided in two forms: contact seals and non-contact seals. Labyrinth seals are a common form of non-contact seal. Compared to contact seals, they offer lower resistance but slightly inferior dustproofing and watertightness.

[0004] In short, the existing belt roller end face sealing devices are simple in design, have poor reliability, are prone to aging and corrosion, and have poor sealing performance, which affects the transmission efficiency and service life of the entire belt roller and conveyor, as well as the operating safety in special environments. Utility Model Content

[0005] In view of the above-mentioned technical problems existing in the existing belt roller end face sealing device, the purpose of the utility model is to provide a three-labyrinth sealing roller, which is provided with a first static sealing ring, a first dynamic sealing ring, a second static sealing ring, and a second dynamic sealing ring inside to form a sealing assembly, and a first sealing labyrinth, a second sealing labyrinth, and a third sealing labyrinth are respectively formed between the first static sealing ring and the first dynamic sealing ring, between the first dynamic sealing ring and the second static sealing ring, and between the second static sealing ring and the second dynamic sealing ring. The three sealing labyrinths can greatly improve the sealing effect of the roller.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a three-way labyrinth seal roller, comprising a roller, a bearing seat arranged in the roller; a bearing arranged in the inner cavity of the bearing seat; a shaft passing through the bearing; a retaining ring arranged on the outside of the bearing seat, the retaining ring being sleeved on the shaft and capable of limiting the axial movement of the bearing; a retaining ring arranged on the inside of the bearing seat, and a sealing assembly arranged between the retaining ring and the bearing;

[0007] The sealing assembly includes a first static sealing ring, a first dynamic sealing ring, a second static sealing ring, and a second dynamic sealing ring, which are arranged in sequence from the retaining ring to the bearing. The first static sealing ring and the second static sealing ring are fixed to the shaft. The first dynamic sealing ring and the second dynamic sealing ring are fixed to the bearing seat and rotate synchronously. A first sealing labyrinth is formed between the first static sealing ring and the first dynamic sealing ring, a second sealing labyrinth is formed between the first dynamic sealing ring and the second static sealing ring, and a third sealing labyrinth is formed between the second static sealing ring and the second dynamic sealing ring.

[0008] Furthermore, the first static sealing ring and the second static sealing ring are interference fit with the shaft, and the first dynamic sealing ring and the second dynamic sealing ring are interference fit with the bearing seat.

[0009] Furthermore, the shaft is a through shaft with a constant diameter.

[0010] Furthermore, the bearing seat includes a seating seat and a connecting ring. The seating seat is a cylindrical structure with an inner cavity therein. The seating seat is provided with an opening for the shaft to pass through. The seating seat is connected to the inner wall of the roller through the connecting ring, and the connection between the connecting ring and the seating seat is an arc structure.

[0011] Furthermore, the end face of the first static sealing ring close to the retaining ring is the outer end face, and the end face of the first static sealing ring close to the first dynamic sealing ring is the inner end face. The length of the outer end face is smaller than the length of the inner end face. The side face of the first static sealing ring is an inclined surface, which is connected between the outer end face and the inner end face and can cooperate to form an isosceles trapezoidal structure. The inner end face is provided with a plurality of annular first concave-convex grooves.

[0012] Furthermore, the outer end surface of the first dynamic seal ring close to the first static seal ring is provided with a plurality of second concave-convex grooves corresponding to the first concave-convex grooves, and the second concave-convex grooves cooperate with the first concave-convex grooves to form a first labyrinth structure;

[0013] The first dynamic seal ring is provided with an edge on the outer edge of the outer end surface close to the first static seal ring, one end of the edge is connected to the first dynamic seal ring and is located in the seating seat, and the other end extends to the connecting ring, and the edge is an arc-shaped structure corresponding to the arc-shaped structure of the connection between the connecting ring and the seating seat, one end surface of the edge is in contact with the bearing seat, and the other end surface is in contact with the bottom angle of the isosceles trapezoid formed by the first static seal ring;

[0014] The edge is composed of a straight segment and an arc segment, the straight segment is parallel to the horizontal plane and connected to one end of the arc segment, the arc segment is arc-shaped, and the other end of the arc segment is connected to the first dynamic sealing ring;

[0015] The inner side surface of the first dynamic sealing ring close to the second static sealing ring is provided with a plurality of annular third concave-convex grooves.

[0016] Furthermore, the outer side surface of the second static seal ring close to the first dynamic seal ring is provided with a plurality of annular fourth concave-convex grooves, and the fourth concave-convex grooves cooperate with the third concave-convex grooves to form a second labyrinth seal;

[0017] The inner side surface of the second static sealing ring close to the second dynamic sealing ring is provided with a plurality of annular fifth concave-convex grooves.

[0018] Furthermore, a plurality of annular sixth concave-convex grooves are provided on the end surface of the second dynamic sealing ring close to the second static sealing ring, and the sixth concave-convex grooves cooperate with the fifth concave-convex grooves to form a third labyrinth seal.

[0019] The utility model provides a three-labyrinth sealing roller, in which a first static sealing ring, a first dynamic sealing ring, a second static sealing ring, and a second dynamic sealing ring are arranged inside to form a sealing assembly, and a first sealing labyrinth, a second sealing labyrinth, and a third sealing labyrinth are respectively formed between the first static sealing ring and the first dynamic sealing ring, between the first dynamic sealing ring and the second static sealing ring, and between the second static sealing ring and the second dynamic sealing ring. The three sealing labyrinths can greatly improve the sealing effect of the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic side view of the cross-sectional structure of the three-stage labyrinth seal roller provided by the present invention;

[0022] Figure 2 for Figure 1 Enlarged schematic diagram of point A in the middle.

[0023] Illustration:

[0024] Roller 100, bearing seat 200, bearing 300, shaft 400, retaining ring 500, retaining ring 600, sealing assembly 700;

[0025] The seating seat 210, the connecting ring 220, the first static sealing ring 710, the outer end face 711, the inner end face 712, the first concave-convex groove 712a, the side face 713, the first dynamic sealing ring 720, the second concave-convex groove 720a, the third concave-convex groove 720b, the edge 721, the straight section 721a, the arc section 721b, the second static sealing ring 730, the fourth concave-convex groove 730a, the fifth concave-convex groove 730b, the second dynamic sealing ring 740, and the sixth concave-convex groove 740a. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0027] See also Figure 1 , Figure 2 , which shows a schematic structural diagram of the three-way labyrinth sealing roller provided by the present invention.

[0028] As can be seen from the drawings, the three-way labyrinth seal roller provided by the present invention includes seven components: a roller 100, a bearing seat 200, a bearing 300, a shaft 400, a retaining ring 500, a retaining ring 600, and a sealing assembly 700.

[0029] The bearing seat 200 is disposed inside the roller 100; the bearing 300 is disposed in the inner cavity of the bearing seat 200; and the shaft 400 is disposed in the bearing 300.

[0030] The retaining ring 500 is arranged outside the bearing seat 200 and is sleeved on the shaft 400 to limit the axial movement of the bearing 300;

[0031] The retaining ring 600 is arranged on the inner side of the bearing seat 200. By arranging the retaining ring 600, the bearing 300 and the bearing seat 200 are isolated to avoid direct contact between the bearing 300 and the bearing seat 200, thereby reducing the wear of the bearing 300 caused by the bearing seat 200.

[0032] The sealing assembly 700 is disposed between the retaining ring 500 and the bearing 300. The sealing assembly 700 includes a first static sealing ring 710, a first dynamic sealing ring 720, a second static sealing ring 730, and a second dynamic sealing ring 740, which are sequentially disposed from the retaining ring 500 to the bearing 300.

[0033] The first static sealing ring 710 and the second static sealing ring 730 are fixed to the shaft 400, the first dynamic sealing ring 720 and the second dynamic sealing ring 740 are fixed to the bearing seat 200 and rotate synchronously. A first sealing labyrinth is formed between the first static sealing ring 710 and the first dynamic sealing ring 720, a second sealing labyrinth is formed between the first dynamic sealing ring 720 and the second static sealing ring 730, and a third sealing labyrinth is formed between the second static sealing ring 730 and the second dynamic sealing ring 740.

[0034] Specifically, the first static sealing ring 710 , the second static sealing ring 730 and the shaft 400 are interference fit. During operation, the first static sealing ring 710 , the second static sealing ring 730 and the shaft 400 remain stationary.

[0035] The first dynamic sealing ring 720 and the second dynamic sealing ring 740 are interference fit with the bearing seat 200 and rotate together with the roller 100 during operation;

[0036] Furthermore, in this solution, the shaft 400 adopts a through shaft of equal diameter, and does not adopt a stepped shaft for positioning the bearing 300. This solution positions the bearing 300 through a retaining ring 500, further improving the strength and rigidity of the shaft 400 and reducing processing costs.

[0037] The bearing seat 200 includes a seating seat 210 and a connecting ring 220. The seating seat 210 is a cylindrical structure with an inner cavity therein. The seating seat 210 is provided with an opening for the shaft 400 to pass through. The seating seat 210 is connected to the inner wall of the roller 100 through the connecting ring 220. The connection between the connecting ring 220 and the seating seat 210 is an arc structure.

[0038] The end face of the first static sealing ring 710 close to the retaining ring 500 is the outer end face 711, and the end face of the first static sealing ring 710 close to the first dynamic sealing ring 720 is the inner end face 712. The length of the outer end face 711 is less than the length of the inner end face 712. The side face 713 of the first static sealing ring 710 is a slope, which is connected between the outer end face 711 and the inner end face 712 and can cooperate to form an isosceles trapezoidal structure.

[0039] The inner end surface 712 is provided with a plurality of annular first concave-convex grooves 712a;

[0040] The first static seal ring 710 of this structure cooperates with the first dynamic seal ring 720. The first dynamic seal ring 720 has a plurality of second concave-convex grooves 720a corresponding to the first concave-convex grooves 712a on its outer end surface close to the first static seal ring 710. The second concave-convex grooves 720a cooperate with the first concave-convex grooves 712a to form a first labyrinth structure.

[0041] Furthermore, an edge 721 is provided on the outer edge of the outer end surface of the first dynamic seal ring 720 near the first static seal ring 710. One end of the edge 721 is connected to the first dynamic seal ring 720 and is located in the seating seat 210, and the other end extends to the connecting ring 200. The edge 721 is an arc-shaped structure corresponding to the arc-shaped structure at the connection between the connecting ring 220 and the seating seat 210. One end surface of the edge 721 is in contact with the bearing seat 200, and the other end surface is in contact with the bottom angle of the isosceles trapezoid formed by the first static seal ring 710.

[0042] The edge 721 is composed of a straight section 721a and an arc section 721b. The straight section 721a is parallel to the horizontal plane and connected to one end of the arc section 721b. The arc section 721b is arc-shaped and the other end of the arc section 721b is connected to the first dynamic sealing ring 720.

[0043] The first dynamic seal ring 720 is provided with a plurality of annular third concave-convex grooves 720b on the inner side surface close to the second static seal ring 730;

[0044] In cooperation with it, the second static seal ring 730 is provided with a plurality of annular fourth concave-convex grooves 730a on the outer side surface close to the first dynamic seal ring 720. The fourth concave-convex grooves 730a cooperate with the third concave-convex grooves 720b to form a second labyrinth seal;

[0045] The second static seal ring 730 is provided with a plurality of annular fifth concave-convex grooves 730b on the inner side surface close to the second dynamic seal ring 740;

[0046] The end surface of the second dynamic seal ring 740 close to the second static seal ring 730 is provided with a plurality of annular sixth concave-convex grooves 740 a , and the sixth concave-convex grooves 740 a cooperate with the fifth concave-convex grooves 730 b to form a third labyrinth seal.

[0047] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A three-way labyrinth seal roller, characterized in that: The invention comprises a roller, a bearing seat arranged in the roller; a bearing arranged in the inner cavity of the bearing seat; a shaft passing through the bearing; a retaining ring arranged on the outer side of the bearing seat, the retaining ring being sleeved on the shaft and capable of limiting the axial movement of the bearing; a retaining ring arranged on the inner side of the bearing seat, and a sealing assembly arranged between the retaining ring and the bearing; The sealing assembly includes a first static sealing ring, a first dynamic sealing ring, a second static sealing ring, and a second dynamic sealing ring, which are arranged in sequence from the retaining ring to the bearing. The first static sealing ring and the second static sealing ring are fixed to the shaft. The first dynamic sealing ring and the second dynamic sealing ring are fixed to the bearing seat and rotate synchronously. A first sealing labyrinth is formed between the first static sealing ring and the first dynamic sealing ring, a second sealing labyrinth is formed between the first dynamic sealing ring and the second static sealing ring, and a third sealing labyrinth is formed between the second static sealing ring and the second dynamic sealing ring.

2. The three-way labyrinth seal roller according to claim 1, characterized in that: The first static sealing ring and the second static sealing ring are interference fit with the shaft, and the first dynamic sealing ring and the second dynamic sealing ring are interference fit with the bearing seat.

3. The three-pass labyrinth seal roller according to claim 1, characterized in that: The shaft is a through shaft with a constant diameter.

4. The three-stage labyrinth seal roller according to claim 1, characterized in that: The bearing seat includes a seating seat and a connecting ring. The seating seat is a cylindrical structure with an inner cavity. The seating seat is provided with an opening for the shaft to pass through. The seating seat is connected to the inner wall of the roller through the connecting ring. The connection between the connecting ring and the seating seat is an arc structure.

5. The three-pass labyrinth seal roller according to claim 4, characterized in that: The end face of the first static sealing ring close to the retaining ring is the outer end face, and the end face of the first static sealing ring close to the first dynamic sealing ring is the inner end face. The length of the outer end face is smaller than the length of the inner end face. The side surface of the first static sealing ring is an inclined surface, which is connected between the outer end face and the inner end face and can cooperate to form an isosceles trapezoidal structure. The inner end face is provided with a plurality of annular first concave-convex grooves.

6. The three-pass labyrinth seal roller according to claim 5, characterized in that: The outer end surface of the first dynamic seal ring close to the first static seal ring is provided with a plurality of second concave-convex grooves corresponding to the first concave-convex grooves, and the second concave-convex grooves cooperate with the first concave-convex grooves to form a first labyrinth structure; The first dynamic seal ring is provided with an edge on the outer edge of the outer end surface close to the first static seal ring, one end of the edge is connected to the first dynamic seal ring and is located in the seating seat, and the other end extends to the connecting ring, and the edge is an arc-shaped structure corresponding to the arc-shaped structure of the connection between the connecting ring and the seating seat, one end surface of the edge is in contact with the bearing seat, and the other end surface is in contact with the bottom angle of the isosceles trapezoid formed by the first static seal ring; The edge is composed of a straight segment and an arc segment, the straight segment is parallel to the horizontal plane and connected to one end of the arc segment, the arc segment is arc-shaped, and the other end of the arc segment is connected to the first dynamic sealing ring; The inner side surface of the first dynamic sealing ring close to the second static sealing ring is provided with a plurality of annular third concave-convex grooves.

7. The three-pass labyrinth seal roller according to claim 6, characterized in that: The second static seal ring is provided with a plurality of annular fourth concave-convex grooves on the outer side surface close to the first dynamic seal ring, and the fourth concave-convex grooves cooperate with the third concave-convex grooves to form a second labyrinth seal; The inner side surface of the second static sealing ring close to the second dynamic sealing ring is provided with a plurality of annular fifth concave-convex grooves.

8. The three-pass labyrinth seal roller according to claim 7, characterized in that: The end surface of the second dynamic sealing ring close to the second static sealing ring is provided with a plurality of annular sixth concave-convex grooves, and the sixth concave-convex grooves cooperate with the fifth concave-convex grooves to form a third labyrinth seal.

Images