Novel oil seal device of fan bearing box

Abstract

The novel oil seal device comprises an oil seal seat and a shaft rod penetrating through the center of the oil seal seat, an oil seal upper cover is arranged at an opening of the oil seal seat, an oil seal rubber sleeve is embedded in the oil seal seat, a heat conduction cavity is formed in the inner wall of the oil seal rubber sleeve, an inner supporting ring is arranged in the heat conduction cavity, and a bottom slope surface is arranged on the oil seal rubber sleeve. A positioning rod is arranged on the bottom slope surface, so that the oil seal rubber sleeve is always in a static pressed state, oil leakage and oil leakage of the oil seal rubber sleeve caused by a movable gap are effectively avoided, the side wall of the oil seal rubber sleeve is provided with an inclined connector which is fractured by 30 degrees, and the inner supporting ring is in a circular ring shape composed of two groups of semicircular rings. The oil seal rubber sleeve and the inner supporting ring can be sleeved from the bottom of the shaft rod during installation and can also be directly assembled in a staggered mode from the side direction of the shaft rod, the installation condition and process are optimized, and the maintenance time and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the field of mechanical seals, in particular to a new oil seal device for a fan bearing box. Background Art

[0002] As an important sealing element, the main function of the oil seal is to prevent the lubricating oil or grease in the bearing box from leaking into the external environment. This helps to keep the lubricating oil inside the bearing box sufficient and clean, ensuring the normal operation of the bearings. By preventing oil leakage, the oil seal can also protect the internal components of the centrifugal fan from corrosion and wear, thereby extending the service life of the equipment.

[0003] In large and medium-sized pellet plants, the existing centrifugal fan bearing box seals use aluminum alloy oil seals (with oil-impregnated felts). After long-term operation, the high-speed rotation of the fan shaft causes the oil-impregnated felts to overheat and age, reducing their elasticity and ultimately resulting in oil leakage. Content of the Utility Model

[0004] The purpose of the utility model is to solve any of the above technical problems, and thus a new oil seal device for a fan bearing box is proposed.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A new oil seal device for a fan bearing box includes an oil seal seat and a shaft rod passing through its center. An oil seal upper cover is arranged at the opening of the oil seal seat. An oil seal rubber sleeve is embedded in the oil seal seat. A heat conduction cavity is arranged on the inner wall of the oil seal rubber sleeve. An inner support ring is arranged in the heat conduction cavity. A bottom slope surface is arranged on the oil seal rubber sleeve, and positioning rods are arranged on the bottom slope surface.

[0006] Further, the oil seal seat is a circular T-shaped platform with a through circular counterbore in the center. A bearing slope surface is arranged on the upper surface of the central counterbore of the oil seal seat. Six positioning holes are arranged in an array on the bearing slope surface. The oil seal rubber sleeve is embedded in the central counterbore of the oil seal seat. An oil seal upper cover is locked and fixed at the opening of the central hole of the oil seal seat.

[0007] Further, the oil seal rubber sleeve is a circular ring with a bottom slope surface on the outer side of the bottom surface. Six positioning rods are arranged in an array on the bottom slope surface. The bottom slope surface fits with the bearing slope surface. The positioning rods pass through the positioning holes. The side wall of the oil seal rubber sleeve is provided with an inclined interface that breaks at 30°. A heat conduction cavity is arranged on the inner wall of the oil seal rubber sleeve. An inner support ring is arranged in the heat conduction cavity. The oil seal rubber sleeve is made of a rubber material that expands when heated.

[0008] Further, the inner support ring is a circular ring composed of two semi-circular rings. The ends of the two semi-circular rings of the inner support ring are both Z-shaped butted staggered interfaces. The inner support ring is made of a metal material with good heat conduction coefficient and wear resistance.

[0009] The beneficial effects of the utility model are:

[0010] The outer side of the bottom surface of the oil seal rubber sleeve is a bottom slope surface, and the bottom slope surface of the oil seal rubber sleeve fits with the bearing slope surface of the oil seal seat. The design of the bottom slope surface of the oil seal rubber sleeve increases the contact area of the compression surface between the oil seal rubber sleeve and the oil seal seat, thereby reducing the probability of oil leakage on the compression surface. The positioning rod of the oil seal rubber sleeve is inserted into the positioning hole of the oil seal seat, effectively preventing the oil seal rubber sleeve from being driven to rotate by the rotating shaft rod, so that the oil seal rubber sleeve is always in a static compression state, effectively avoiding oil leakage caused by the movement gap of the oil seal rubber sleeve. The side wall of the oil seal rubber sleeve is provided with an inclined interface that breaks at 30°. The inner support ring is a circular ring composed of two semi-circular rings, so that the oil seal rubber sleeve and the inner support ring can not only be sleeved from the bottom of the shaft rod during installation, but also can be directly misassembled from the side of the shaft rod, optimizing the installation conditions and process, and reducing the maintenance time and cost. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0012] Figure 2 is a sectional view of the whole of the present invention;

[0013] Figure 3 is an installation schematic diagram of the oil seal rubber sleeve of the present invention;

[0014] Figure 4 is an installation sectional view of the oil seal rubber sleeve of the present invention;

[0015] Figure 5 is a schematic structural diagram of the oil seal seat of the present invention;

[0016] Figure 6 is a schematic structural diagram of the oil seal rubber sleeve of the present invention;

[0017] Figure 7 is a schematic structural diagram of the inner support ring of the present invention.

[0018] In Figures 1 to 7 , the corresponding relationship between the component names or lines and the drawing reference numerals is: oil seal seat 1, bearing slope surface 11, positioning hole 12, shaft rod 2, oil seal upper cover 3, oil seal rubber sleeve 4, inclined interface 41, heat conduction cavity 42, bottom slope surface 43, positioning rod 44, inner support ring 5, misalignment interface 51. Detailed Description of the Invention

[0019] Please refer to Figures 1 to 7 ;

[0020] This embodiment provides a new oil seal device for a fan bearing box, which includes an oil seal seat 1 and a shaft rod 2 passing through the center thereof. An oil seal upper cover 3 is arranged at the opening of the oil seal seat 1. An oil seal rubber sleeve 4 is embedded in the oil seal seat 1. A heat conduction cavity 42 is arranged on the inner wall of the oil seal rubber sleeve 4. An inner support ring 5 is arranged in the heat conduction cavity 42. A bottom slope surface 43 is arranged on the oil seal rubber sleeve 4, and a positioning rod 44 is arranged on the bottom slope surface 43.

[0021] Preferably, the oil seal seat 1 is a circular T-shaped platform with a through circular counterbore in the center. A bearing slope surface 11 is arranged on the upper surface of the central counterbore of the oil seal seat 1. Six positioning holes 12 distributed in an array are arranged on the bearing slope surface 11. The oil seal rubber sleeve 4 is embedded in the central counterbore of the oil seal seat 1, and an oil seal upper cover 3 is locked and fixed at the opening of the central hole of the oil seal seat 1.

[0022] In a specific embodiment, the outer side of the bottom surface of the oil seal rubber sleeve 4 is the bottom slope surface 43. The bottom slope surface 43 of the oil seal rubber sleeve 4 is attached to the bearing slope surface 11 of the oil seal seat 1. The design of the bottom slope surface 43 of the oil seal rubber sleeve 4 increases the contact area of the pressure-receiving surface between the oil seal rubber sleeve 4, thereby reducing the probability of oil leakage from the pressure-receiving surface.

[0023] Preferably, the oil seal rubber sleeve 4 is a circular ring with a bottom slope surface 43 on the outer side of the bottom surface. Six positioning rods 44 distributed in an array are arranged on the bottom slope surface 43. The bottom slope surface 43 is attached to the bearing slope surface 11. The positioning rods 44 are inserted into the positioning holes 12. An inclined interface 41 with a 30° fracture is arranged on the side wall of the oil seal rubber sleeve 4. A heat conduction cavity 42 is arranged on the inner wall of the oil seal rubber sleeve 4. An inner support ring 5 is arranged in the heat conduction cavity 42. The oil seal rubber sleeve 4 is made of a rubber material that expands when heated.

[0024] In a specific embodiment, the positioning rods 44 of the oil seal rubber sleeve 4 are inserted into the positioning holes 12 of the oil seal seat 1, effectively avoiding the situation that the oil seal rubber sleeve 4 is driven to rotate by the rotating shaft rod 2, so that the oil seal rubber sleeve 4 is always in a static pressure-receiving state, effectively avoiding oil leakage of the oil seal rubber sleeve 4 caused by the movement gap.

[0025] Preferably, the inner support ring 5 is a circular ring composed of two semi-circular rings. The end parts of the two semi-circular rings of the inner support ring 5 are both Z-shaped butt-jointed dislocation interfaces 51. The inner support ring 5 is made of a metal material with good heat conduction coefficient and wear resistance.

[0026] In a specific embodiment, an inclined interface 41 with a 30° fracture is arranged on the side wall of the oil seal rubber sleeve 4. The inner support ring 5 is a circular ring composed of two semi-circular rings, so that the oil seal rubber sleeve 4 and the inner support ring 5 can not only be sleeved from the bottom of the shaft rod 2 during installation, but also be directly assembled in a dislocation manner from the side of the shaft rod 2, optimizing the installation conditions and process.

[0027] In a specific embodiment, the oil seal rubber sleeve 4 is made of rubber material that expands when heated, and the inner support ring 5 is made of wear-resistant metal material with good thermal conductivity. The inner support ring 5 transfers the heat of the rotating shaft rod 2 to the heat conduction cavity 42 of the oil seal rubber sleeve 4. The oil seal rubber sleeve 4 expands when heated, making the oil seal rubber sleeve 4 fit more closely to the side of the shaft rod 2, thereby improving the sealing effect of the oil seal.

[0028] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. A new oil seal device for a fan bearing box, comprising an oil seal seat (1) and a shaft rod (2) passing through the center thereof, and an oil seal upper cover (3) is arranged at the opening of the oil seal seat (1), and is characterized in that: The oil seal seat (1) is internally embedded with an oil seal rubber sleeve (4). A heat conduction cavity (42) is arranged on the inner wall of the oil seal rubber sleeve (4). An inner support ring (5) is arranged in the heat conduction cavity (42). A bottom slope surface (43) is arranged on the oil seal rubber sleeve (4), and a positioning rod (44) is arranged on the bottom slope surface (43).

2. The novel oil seal device for a fan bearing box according to claim 1, characterized in that: The oil seal seat (1) is a circular T-shaped platform with a through circular counterbore in the center. A bearing slope surface (11) is arranged on the upper surface of the central counterbore of the oil seal seat (1). Six positioning holes (12) distributed in an array are arranged on the bearing slope surface (11). The oil seal rubber sleeve (4) is internally embedded in the central counterbore of the oil seal seat (1). An oil seal upper cover (3) is locked and fixed at the opening of the central hole of the oil seal seat (1).

3. The novel oil seal device for a fan bearing box according to claim 2, characterized in that: The oil seal rubber sleeve (4) is in a circular ring shape with a bottom slope surface (43) on the outer side of the bottom surface. Six positioning rods (44) distributed in an array are arranged on the bottom slope surface (43). The bottom slope surface (43) is attached to the bearing slope surface (11). The positioning rods (44) are inserted into the positioning holes (12). An inclined interface (41) with a 30° break is arranged on the side wall of the oil seal rubber sleeve (4). A heat conduction cavity (42) is arranged on the inner wall of the oil seal rubber sleeve (4). An inner support ring (5) is arranged in the heat conduction cavity (42). The oil seal rubber sleeve (4) is made of rubber material that expands when heated.

4. The novel oil seal device for the fan bearing box according to claim 3, wherein: The inner support ring (5) is in a circular ring shape composed of two groups of semi-circular rings. The end tails of the two groups of semi-circular rings of the inner support ring (5) are both Z-shaped butt joints with offset interfaces (51). The inner support ring (5) is made of metal material with good heat conductivity and wear resistance.

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