A sealed bearing housing for spray conditions

Abstract

The present invention relates to the technical field of mechanical seals, and discloses a sealed bearing box for spray working conditions, which includes a box body, a bearing and a roller. A gear is provided at one end of the roller extending into the box body through the bearing. A gland is arranged on the upper side of the box body, and a sealing rubber ring is arranged between the gland and the box body. An upper sealing groove is formed on one side of the gland, and a lower sealing groove corresponding to the upper sealing groove is formed on one side of the box body. The same sealing ring is arranged in the upper sealing groove and the lower sealing groove. Threaded holes are formed on the circumferential side of the sealing ring, and the sealing ring is fixedly connected to the roller through screws. An annular intercepting plate is arranged on the circumferential side of the sealing ring, and intercepting protrusions inclined inwards are arranged on the outer edge of the annular intercepting plate. The sealed bearing box for spray working conditions of the present invention is convenient for installation and maintenance, can effectively prevent external cooling media from entering the interior of the bearing box, has a long service life, and has low precision requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical seals, and particularly to a sealed bearing housing for a spray working condition. Background Art

[0002] A bearing housing is a box part that plays a role in supporting and lubricating bearings. At the same time, it bears the axial and radial forces generated during the operation of the equipment. In equipment with a rotating shaft or roller, the rotating shaft and roller are generally supported by bearings and rotated, and the bearings are installed in the bearing housing, and the bearing housing is filled with lubricating oil. During the working process, the lubricating oil lubricates the bearings and internal gears, so it is necessary to fully ensure the sealing performance of the bearing housing.

[0003] The bearing housing is usually sealed in the following two ways: oil seal and labyrinth seal. However, for bearing housings, gearboxes or speed reducers located within the spraying range of cooling media (such as emulsion, rolling oil, water, etc.) in rolling mills, cleaning devices, etc., the above two sealing methods are not ideal. Due to the strong corrosiveness of the cooling medium, the oil seal is prone to aging and has a short service life. The labyrinth seal has high requirements for the accuracy of machining and assembly, while the on-site working environment is usually relatively harsh, with severe vibration, which is likely to cause wear of the labyrinth seal, thereby reducing the sealing effect of the labyrinth seal. Neither the oil seal nor the labyrinth seal can fully seal and protect the bearing housing, and the cooling medium is likely to enter the bearing housing, resulting in a decline in the performance of the lubricating oil, leading to lack of lubrication or poor lubrication of the gears and bearings, thereby reducing the service life of the gears and bearings. During the subsequent use process, it is necessary to frequently replace parts, which severely restricts the operating efficiency of the equipment.

[0004] Therefore, there is an urgent need for a bearing housing with good sealing performance, long service life, and little influence from environmental factors. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a sealed bearing housing for a spray working condition, aiming to solve the problems that the existing bearing housing is prone to seal failure, the external cooling medium is likely to enter the bearing housing, causing a decline in the performance of the lubricating oil, and resulting in the failure of the bearings and gears due to poor lubrication.

[0006] The present invention solves the above technical problems through the following technical means:

[0007] A sealed bearing housing for a spraying operation, comprising a housing body, a bearing and a roller installed on one side of the housing body. The roller is rotatably connected to the bearing. A gear is provided at one end of the roller extending into the housing body through the bearing. A gland is arranged on the upper side of the housing body. The gland is detachably connected to the housing body. The lower side of the gland cooperates with the housing body and the bearing. A sealing rubber ring is provided between the gland and the housing body. An upper sealing groove is formed on the side of the gland facing the roller, and a lower sealing groove corresponding to the upper sealing groove is formed on the side of the housing body facing the roller. The same sealing ring is arranged in the upper sealing groove and the lower sealing groove. Threaded holes are formed on the circumferential side of the sealing ring. The sealing ring is fixedly connected to the roller by screws. An annular intercepting plate is arranged on the circumferential side of the end of the sealing ring away from the roller. An inwardly inclined intercepting protrusion is arranged on the side of the outer edge of the annular intercepting plate facing the roller.

[0008] Further, the sealing ring is composed of two semi-circular sealing sub-rings, and the two sealing sub-rings can enclose a complete sealing ring. The threaded holes are formed in the middle of the sealing sub-rings.

[0009] Such a structural design facilitates the installation, replacement and maintenance of the sealing ring, and can avoid the need to pull out the bearing for installation when replacing the skeleton oil seal, making the operation more convenient.

[0010] Further, the sealing ring is in interference fit with the roller.

[0011] Such a structural design can prevent external cooling medium from flowing into the gap between the inner hole of the sealing ring and the roller.

[0012] Further, the sealing ring is made of metal material.

[0013] Such a structural design can effectively prevent the emulsion from corroding the sealing ring, thereby improving the service life of the sealing ring and the sealed bearing housing.

[0014] Further, a baffle is provided at one end of the upper side of the gland close to the roller.

[0015] Such a structural design can block part of the cooling medium through the baffle, thereby reducing the contact between the cooling medium and the sealing ring and the upper and lower sealing grooves.

[0016] Further, the upper sealing groove is provided with a small inwardly inclined chamfer; the lower sealing groove is provided with a large outwardly inclined chamfer, and the angle of the large outwardly inclined chamfer is 45°.

[0017] Such a structural design has better sealing effect and lower requirement for installation accuracy; the external cooling medium is not easy to enter the upper and lower sealing grooves, and the cooling medium entering the upper and lower sealing grooves is not easy to stay and will be quickly discharged.

[0018] Further, a pin is provided on the upper side of the box body, and a limiting hole is opened at a position corresponding to the pin on the lower side of the gland.

[0019] With such a structural design, it can be guided by the pin, reducing the installation difficulty and ensuring the installation accuracy. At the same time, when the gland is installed, it can prevent the gland from damaging the sealing ring.

[0020] Beneficial effects:

[0021] 1. The sealed bearing box for spray working conditions of the present invention is provided with a gland, an upper sealing groove, a lower sealing groove, a sealing ring, a threaded hole, an annular intercepting plate, a sealing sub-ring and a baffle, which can effectively prevent external cooling medium from entering the inside of the bearing box, and will not cause the reduction or emulsification of the lubricating oil performance. It can fully lubricate and maintain the bearings and gears, thereby improving the service life of the bearings and gears, reducing the equipment failure time, and improving the equipment operation efficiency; at the same time, the sealing ring of the sealed bearing box of the present invention is made of metal material, which can effectively prevent emulsion corrosion and has a longer service life.

[0022] 2. Compared with oil seals and labyrinth seals, the sealed bearing box for spray working conditions of the present invention is more convenient for installation and maintenance. The sealing ring can be replaced without pulling out the bearing, greatly improving the maintenance efficiency of the equipment. The present invention can completely replace oil seals and labyrinth seals, solving the problems that oil seals are easily corroded and aged by cooling medium, and labyrinth seals require high precision and are not suitable for harsh places with large vibrations.

[0023] Other advantages, objects and features of the present invention will be described to some extent in the subsequent specification, and to some extent, based on the study of the following text, it will be obvious to those skilled in the art, or can be taught from the practice of the present invention. The objects and other advantages of the present invention can be realized and obtained through the following specification. Brief Description of the Drawings

[0024] Figure 1 is the front sectional view of the sealed bearing box for spray working conditions of the present invention;

[0025] Figure 2 is Figure 1 the enlarged view of part A in

[0026] Figure 3 is the structural schematic diagram of the sealing ring;

[0027] The reference numerals in the drawings are as follows: box body 1, bearing 2, roller 3, gear 4, gland 5, upper sealing groove 6, lower sealing groove 7, sealing ring 8, threaded hole 9, annular intercepting plate 10, sealing sub-ring 11, baffle 12. Detailed Embodiments

[0028] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the diagrams provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams rather than actual diagrams, and should not be construed as a limitation to the present invention. To better illustrate the embodiments of the present invention, some components in the diagrams will be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the diagrams may be omitted.

[0029] In the diagrams of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the diagrams, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the diagrams are only for illustrative purposes and should not be construed as a limitation to the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] As Figures 1 - 3 shown, a sealed bearing housing for a spraying working condition of the present invention includes a housing 1, a roller 3, and a bearing 2 installed on the left side of the housing 1. The roller 3 is rotatably connected to the bearing 2, and the right end of the roller 3 extends into the housing 1 through the bearing 2 and is fixedly connected with a gear 4. A gland 5 is arranged on the upper side of the housing 1, and the lower side of the gland 5 cooperates with the housing 1 and the bearing 2. A pin is arranged on the upper side of the housing 1, and a limit hole is opened at the position corresponding to the pin on the lower side of the gland 5. The gland 5 is detachably connected to the housing 1 through bolts, and a sealing rubber ring is further arranged between the gland 5 and the housing 1. One end of the upper side of the gland 5 close to the roller 3 is fixedly connected with a baffle 12. An upper sealing groove 6 is opened on the left side of the gland 5, and the upper sealing groove 6 is provided with a small chamfer inclined inward; a lower sealing groove 7 corresponding to the upper sealing groove 6 is opened on the left side of the housing 1, and the lower sealing groove 7 is provided with a large chamfer inclined outward, and the angle of the large chamfer inclined outward is 45°. The same sealing ring 8 is arranged in the upper sealing groove 6 and the lower sealing groove 7. The sealing ring 8 in this embodiment is made of a metal material.

[0031] The sealing ring 8 is in interference fit with the roller 3. An annular intercepting plate 10 is arranged on the circumferential side of the end of the sealing ring 8 away from the roller 3. An inwardly inclined intercepting projection is arranged on the side of the outer edge of the annular intercepting plate 10 facing the roller 3. The sealing ring 8 and the annular intercepting plate 10 are integrally formed. The sealing ring 8 is composed of two semi-circular sealing sub-rings 11. The two sealing sub-rings 11 are symmetrically arranged and can enclose a complete sealing ring 8. Threaded holes 9 are provided in the middle of the two sealing sub-rings 11, and the sealing sub-rings 11 are fixedly connected to the roller 3 by screws.

[0032] For the bearing housing within the spraying range of the cooling medium (such as emulsion, rolling oil, water, etc.), replace it with the sealed bearing housing of the present invention and install the sealed bearing housing of the present invention according to the above connection method. During use, the sealed bearing housing of the present invention always maintains good sealing performance, can block the entry of the external cooling medium into the bearing housing, the performance of the lubricating oil will not decline, and the bearings 2 and gears 4 can be fully lubricated and maintained.

[0033] The principle of good sealing performance is as follows:

[0034] 1). The baffle 12 on the upper side of the gland 5 initially blocks the cooling medium, thereby reducing the contact between the cooling medium and the sealing ring 8, the upper sealing groove 6 and the lower sealing groove 7;

[0035] 2). The sealing ring 8 is in interference fit with the roller 3, which can prevent the external cooling medium from flowing in through the gap between the inner hole of the sealing ring 8 and the roller 3;

[0036] 3). The sealing ring 8 is made of metal material, which can effectively prevent emulsion corrosion and improve the service life of the sealing ring 8;

[0037] 4). The sealing ring 8 is fixedly connected with an annular intercepting plate 10, and an inwardly inclined intercepting projection is arranged on the annular intercepting plate 10, which can block the cooling medium flowing towards the connection between the roller 3 and the box body 1;

[0038] 5). An upper sealing groove 6 is provided on the left side of the gland 5, and the upper sealing groove 6 cooperates with the sealing ring 8 to further improve the sealing effect; a lower sealing groove 7 is provided on the left side of the box body 1, and the lower sealing groove 7 diverts the flowing cooling medium to the outside of the box body 1, making it difficult for the cooling medium to stay at the connection between the roller 3 and the box body 1.

[0039] When the sealed bearing housing of the present invention is used for a period of time and the sealing ring 8 needs to be replaced, remove the gland 5, then take out the screws from the threaded holes 9 of the sealing ring 8 to release the fixed state between the sealing ring 8 and the roller 3, and then remove the two old sealing sub-rings 11 for replacement. After replacement, reinstall the gland 5.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A sealed bearing housing for spray conditions, comprising a housing (1), a bearing (2) installed on one side of the housing (1), and a roller (3), the roller (3) is rotatably connected to the bearing (2), and a gear (4) is provided at one end of the roller (3) extending into the housing (1) through the bearing (2), characterized in that: A gland (5) is provided on the upper side of the box body (1). The gland (5) is detachably connected to the box body (1). The lower side of the gland (5) cooperates with the box body (1) and the bearing (2). A sealing rubber ring is provided between the gland (5) and the box body (1). An upper sealing groove (6) is formed on one side of the gland (5) facing the roller (3). A lower sealing groove (7) corresponding to the upper sealing groove (6) is formed on one side of the box body (1) facing the roller (3). The same sealing ring (8) is arranged in the upper sealing groove (6) and the lower sealing groove (7). Threaded holes (9) are formed on the circumferential side of the sealing ring (8). The sealing ring (8) is fixedly connected to the roller (3) by screws. An annular intercepting plate (10) is arranged on the circumferential side of the end of the sealing ring (8) away from the roller (3). An intercepting protrusion inclined inward is arranged on the side of the outer edge of the annular intercepting plate (10) facing the roller (3). The upper sealing groove (6) is provided with a small chamfer inclined inward, and the lower sealing groove (7) is provided with a large chamfer inclined outward. The angle of the large chamfer inclined outward is 45°.

2. The sealed bearing housing for spray operation according to claim 1, characterized in that: The sealing ring (8) is composed of two semi-circular sealing sub-rings (11). The two sealing sub-rings (11) can be enclosed to form a complete sealing ring (8). The threaded holes (9) are formed in the middle of the sealing sub-rings (11).

3. A sealed bearing housing for spray operation according to claim 1, characterized in that: The sealing ring (8) is in interference fit with the roller (3).

4. A sealed bearing housing for spray conditions according to claim 1, characterized in that: The sealing ring (8) is made of metal material.

5. A sealed bearing housing for spray conditions according to claim 1, characterized in that: A baffle (12) is provided at one end of the upper side of the gland (5) close to the roller (3).

6. A sealed bearing housing for spray operation according to claim 1, characterized in that: A pin is provided on the upper side of the box body (1), and a limit hole is formed at the position of the lower side of the gland (5) corresponding to the pin.

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