Self-lubricating drive shaft seal structure

Abstract

This utility model relates to the field of transmission shaft sealing technology, and in particular to a self-lubricating transmission shaft sealing structure. The self-lubricating transmission shaft sealing structure includes: a transmission shaft; a bearing housing fixedly connected to the outer wall of the transmission shaft; a bearing cover fixedly connected to one side of the bearing housing; a bearing body fixedly connected inside the bearing housing; symmetrically mounted arc-shaped rings on the outer wall of the transmission shaft; symmetrically fixedly connected mounting blocks to one side of the arc-shaped rings; a sealing ring for compressing the arc-shaped ring fixedly connected inside the bearing housing; a grease reservoir between the sealing ring and the bearing body; and a compression assembly for compressing the sealing ring installed inside the bearing housing. The self-lubricating transmission shaft sealing structure provided by this utility model, through the design of the arc-shaped ring and the sealing ring cooperating with the compression assembly, avoids grease loss and has the advantages of extending equipment life, reducing maintenance costs, and enhancing sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of transmission shaft sealing technology, and in particular to a self-lubricating transmission shaft sealing structure. Background Technology

[0002] In reality, the drive shaft sealing structure is a functional component in mechanical devices used to isolate the gap between the drive shaft and components such as bearing housings and bearing covers. It is usually composed of rubber sealing rings, metal sealing rings, and arc-shaped baffles. By tightly fitting the outer wall of the drive shaft and the inner wall of the bearing housing, it forms a barrier to prevent grease leakage and the intrusion of external impurities. Lubricating the drive shaft is to reduce friction and wear. The grease forms an oil film on the contact surface between the drive shaft and the bearing, which avoids dry metal-to-metal friction and can also dissipate heat and cool the shaft.

[0003] In mechanical transmission systems, the drive shaft, as a core component, must simultaneously meet the requirements of sealing and lubrication. The gap between the bearing housing and the drive shaft can lead to grease loss due to centrifugal force or pressure fluctuations. Grease used to lubricate the bearing body can easily leak into the device, which not only increases the wear of bearing components but also affects the normal operation of the equipment and shortens its lifespan. In addition, existing technologies usually rely on a small amount of grease in the bearing cavity for lubrication, and failure to replenish it in time can easily cause excessive wear of the bearing body.

[0004] Therefore, it is necessary to provide a new self-lubricating drive shaft sealing structure to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a self-lubricating transmission shaft sealing structure.

[0006] The self-lubricating transmission shaft sealing structure provided by this utility model includes: a transmission shaft, a bearing housing fixedly connected to the outer wall of the transmission shaft, a bearing cover fixedly connected to one side of the bearing housing, a bearing body fixedly connected inside the bearing housing, an arc-shaped ring symmetrically installed on the outer wall of the transmission shaft, an mounting block symmetrically fixedly connected to one side of the arc-shaped ring, a sealing ring for compressing the arc-shaped ring fixedly connected inside the bearing housing, a grease storage cavity provided between the sealing ring and the bearing body, and a compression assembly for compressing the sealing ring installed inside the bearing housing.

[0007] Preferably, the extrusion assembly includes: an adjusting plate, a first bolt, an extrusion plate, a slide rod, and a spring. The adjusting plate is slidably connected at equal intervals inside the bearing housing. The first bolt is fixedly connected to the top of the adjusting plate and threadedly connected to the bearing housing. The extrusion plate is installed at equal intervals inside the bearing housing. The slide rod is fixedly connected at equal intervals to the top of the extrusion plate. One end of the slide rod passes through the adjusting plate and is slidably connected to the adjusting plate. A spring is sleeved on the outer wall of the slide rod. One end of the spring is fixedly connected to the extrusion plate, and the other end of the spring is fixedly connected to the adjusting plate.

[0008] Preferably, an arc-shaped baffle is fixedly connected inside the bearing housing, and the arc-shaped baffle is located inside the grease storage cavity.

[0009] Preferably, a first grease nipple is fixedly connected to one side of the bearing body, and one end of the first grease nipple is connected to the outside of the bearing housing.

[0010] Preferably, the bearing housing is symmetrically equipped with second bolts, and the corresponding sets of mounting blocks are connected by the thread of the second bolts.

[0011] Preferably, a second grease nipple is fixedly connected inside the bearing housing, and the grease reservoir is connected to the outside through the second grease nipple.

[0012] Preferably, both the first and second oil nozzles have a knob threadedly connected to one end.

[0013] Compared with related technologies, the self-lubricating drive shaft sealing structure provided by this utility model has the following beneficial effects:

[0014] Extend equipment life:

[0015] The sealing structure of the arc ring and sealing ring, combined with the adjustable extrusion component to dynamically control the sealing pressure, effectively prevents grease from leaking into the device. The independent design of the grease reservoir avoids grease loss and continuously replenishes grease to the bearing body, reducing dry friction and wear and extending the service life of the bearing and equipment.

[0016] Reduce maintenance costs:

[0017] The grease reservoir, along with the first and second grease nozzles, enables long-term storage and precise supply of grease. A single grease injection can maintain a longer operating time than traditional structures. The extrusion component design allows for restoration of sealing performance without disassembling the equipment, reducing maintenance time.

[0018] Enhanced sealing performance:

[0019] The arc-shaped ring and the sealing ring work together to form a compression sealing interface. Combined with the adjustable compression component, the sealing pressure is precisely controlled, eliminating the gap between the sealing ring and the arc-shaped ring, effectively preventing grease leakage. At the same time, the arc-shaped baffle in the grease reservoir helps to prevent the grease from spreading under centrifugal force and prevents excessive filling of grease. Attached Figure Description

[0020] Figure 1 A schematic diagram of the self-lubricating transmission shaft sealing structure provided by this utility model;

[0021] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the bearing housing.

[0022] Figure 3 for Figure 2The diagram shows the structure of the extrusion assembly.

[0023] Figure 4 for Figure 3 The diagram shows a cross-sectional view of the sealing ring.

[0024] Figure 5 for Figure 3 The diagram shows the structure of the adjustment plate.

[0025] The following are the labels in the diagram: 1. Drive shaft; 2. Bearing housing; 3. Bearing cover; 4. Bearing body; 5. Arc ring; 6. Mounting block; 7. Sealing ring; 8. Grease reservoir; 21. Adjusting plate; 22. First bolt; 23. Extrusion plate; 24. Slide rod; 25. Spring; 31. Arc baffle; 41. First grease nipple; 51. Second bolt; 61. Second grease nipple; 71. Knob. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0027] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0028] Please see Figures 1 to 5 A self-lubricating drive shaft sealing structure includes: a drive shaft 1; a bearing housing 2 fixedly connected to the outer wall of the drive shaft 1; a bearing cover 3 fixedly connected to one side of the bearing housing 2; a bearing body 4 fixedly connected inside the bearing housing 2; arc-shaped rings 5 ​​symmetrically installed on the outer wall of the drive shaft 1; mounting blocks 6 symmetrically fixedly connected to one side of the arc-shaped rings 5; a sealing ring 7 for compressing the arc-shaped rings 5 ​​fixedly connected inside the bearing housing 2; a grease reservoir 8 between the sealing ring 7 and the bearing body 4; and a compression device for compressing the sealing ring 7 installed inside the bearing housing 2. The components include an arc-shaped baffle 31 fixedly connected inside the bearing housing 2, which is located inside the grease reservoir 8; a first grease nipple 41 fixedly connected to one side of the bearing body 4, with one end of the first grease nipple 41 communicating with the outside of the bearing housing 2; second bolts 51 symmetrically installed inside the bearing housing 2; and multiple sets of mounting blocks 6 threadedly connected to each other via the second bolts 51; a second grease nipple 61 fixedly connected inside the bearing housing 2; and the grease reservoir 8 communicating with the outside via the second grease nipple 61; and a knob 71 threadedly connected to one end of both the first grease nipple 41 and the second grease nipple 61.

[0029] It should be noted that knob 71 is used to seal the first grease nipple 41 and the second grease nipple 61, control the injection and storage of grease, facilitate maintenance and prevent impurities from entering.

[0030] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5 The extrusion assembly includes: an adjusting plate 21, a first bolt 22, an extrusion plate 23, a slide rod 24, and a spring 25. The adjusting plate 21 is equidistantly slidably connected inside the bearing seat 2. The first bolt 22 is fixedly connected to the top of the adjusting plate 21 and threadedly connected to the bearing seat 2. The extrusion plate 23 is equidistantly installed inside the bearing seat 2. The slide rod 24 is fixedly connected to the top of the extrusion plate 23 at equal intervals. One end of the slide rod 24 passes through the adjusting plate 21 and is slidably connected to the adjusting plate 21. A spring 25 is sleeved on the outer wall of the slide rod 24. One end of the spring 25 is fixedly connected to the extrusion plate 23, and the other end of the spring 25 is fixedly connected to the adjusting plate 21.

[0031] It should be noted that the first bolt 22 is hollow inside. When the sliding rod 24 located directly below the first bolt 22 slides, it will slide inside the first bolt 22. There are multiple rubber rings between the arc ring 5 and the sealing ring 7. The rubber rings can fill the gap through elastic deformation, enhance the sealing fit, buffer vibration and adapt to the movement of the drive shaft 1, and effectively prevent grease leakage.

[0032] The working principle of the self-lubricating transmission shaft sealing structure provided by this utility model is as follows:

[0033] Grease reservoir 8 is sealed:

[0034] Initial installation: The arc-shaped ring 5 is fixed to the outer wall of the drive shaft 1 by the mounting block 6 and the second bolt 51, so that the arc-shaped ring 5 fits tightly with the drive shaft 1. The sealing ring 7 is located inside the bearing seat 2 and contacts the arc-shaped ring 5. By rotating the first bolt 22, the adjusting plate 21 is pushed downward. The adjusting plate 21 is squeezed by the spring 25 to squeeze the compression plate 23, so that the sealing ring 7 applies pressure to the arc-shaped ring 5 to form a tight sealing interface. When the drive shaft 1 rotates, the arc-shaped ring 5 rotates synchronously with the shaft. The sealing ring 7 remains stationary and continuously squeezes the arc-shaped ring 5. The friction of the contact surface between the two prevents the grease from leaking from the gap between the shaft and the bearing seat 2. The spring 25 can buffer vibration and drive shaft 1 movement and maintain the stability of the sealing pressure.

[0035] Lubricated bearing body 4:

[0036] Grease is injected into the raceway of the bearing body 4 through the first grease nipple 41, and at the same time, sufficient grease is filled into the grease reservoir 8 through the second grease nipple 61. When the bearing body 4 is running, the grease in the grease reservoir 8 flows slowly into the bearing contact area through the gap at the bottom of the baffle to replenish the consumed grease. When the grease in the grease reservoir 8 is insufficient, it can be directly replenished through the second grease nipple 61 without disassembling the bearing, making the operation convenient.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A self-lubricating propeller shaft (1) sealing structure, characterized in that, include: A drive shaft (1) is fixedly connected to a bearing housing (2) on its outer wall. A bearing cover (3) is fixedly connected to one side of the bearing housing (2). A bearing body (4) is fixedly connected inside the bearing housing (2). Arc-shaped ring (5), arc-shaped ring (5) is symmetrically installed on the outer wall of the drive shaft (1), and mounting block (6) is symmetrically fixedly connected on one side of the arc-shaped ring (5); A sealing ring (7) is fixedly connected inside the bearing housing (2) for extruding the arc ring (5), and a grease reservoir (8) is provided between the sealing ring (7) and the bearing body (4). The extrusion assembly is installed inside the bearing housing (2) for extruding the sealing ring (7).

2. The self-lubricating propeller shaft (1) seal arrangement according to claim 1, characterized in that The extrusion assembly includes: an adjusting plate (21), a first bolt (22), an extrusion plate (23), a slide rod (24), and a spring (25). The adjusting plate (21) is equidistantly slidably connected inside the bearing seat (2). The first bolt (22) is fixedly connected to the top of the adjusting plate (21). The first bolt (22) is threadedly connected to the bearing seat (2). The extrusion plate (23) is equidistantly installed inside the bearing seat (2). The slide rod (24) is fixedly connected to the top of the extrusion plate (23). One end of the slide rod (24) passes through the adjusting plate (21) and is slidably connected to the adjusting plate (21). The outer wall of the slide rod (24) is fitted with a spring (25). One end of the spring (25) is fixedly connected to the extrusion plate (23), and the other end of the spring (25) is fixedly connected to the adjusting plate (21).

3. The self-lubricating transmission shaft (1) sealing structure according to claim 1, characterized in that, An arc-shaped baffle (31) is fixedly connected inside the bearing housing (2), and the arc-shaped baffle (31) is located inside the grease reservoir (8).

4. The self-lubricating transmission shaft (1) sealing structure according to claim 1, characterized in that, A first oil injection nozzle (41) is fixedly connected to one side of the bearing body (4), and one end of the first oil injection nozzle (41) is connected to the outside of the bearing housing (2).

5. The self-lubricating transmission shaft (1) sealing structure according to claim 1, characterized in that, The bearing housing (2) is symmetrically equipped with second bolts (51), and the corresponding sets of mounting blocks (6) are threadedly connected by the second bolts (51).

6. The self-lubricating transmission shaft (1) sealing structure according to claim 4, characterized in that, The bearing housing (2) is fixedly connected to a second grease nipple (61), and the grease reservoir (8) is connected to the outside through the second grease nipple (61).

7. The self-lubricating transmission shaft (1) sealing structure according to claim 6, characterized in that, Both the first oil nozzle (41) and the second oil nozzle (61) have a knob (71) threaded onto one end.

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