Sealed bearing structure with automatic compensation lubrication function
By designing a sealed bearing structure with automatic lubrication compensation function, the automatic compensation and discharge of lubricating grease is realized, solving the problems of bearing wear and equipment instability caused by poor lubrication, and improving the operational stability of the equipment and the bearing life.
Patent Information
- Application Number
- CN202520194803.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2035-02-07
AI Technical Summary
Existing bearing lubrication methods rely on manual experience, which can easily lead to excessive or insufficient lubrication, resulting in bearing wear and unstable equipment operation. This is especially true in high-pressure roller mill crushing equipment in mines, where there is a lack of effective lubrication protection.
Design a sealed bearing structure with automatic lubrication compensation function. By combining a grease lubrication chamber and a grease storage chamber, the automatic compensation and discharge of lubricating grease can be achieved, ensuring that the bearing is always in a good lubrication state and avoiding problems of insufficient or excessive lubrication.
It effectively reduces the bearing friction coefficient and wear, extends the bearing service life, ensures stable equipment operation, and avoids bearing failure and equipment operation risks caused by poor lubrication.
Smart Images
Figure CN223549655U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lubrication system technology, specifically relating to a sealed bearing structure with automatic lubrication compensation function. Background Technology
[0002] Bearings are essential components in modern machinery. Their primary function is to support rotating mechanical parts, reduce the coefficient of friction during movement, and ensure rotational accuracy. Therefore, they are widely used in machinery in various fields such as mining, metal smelting, building materials, road transportation, railway transportation, water conservancy projects, and the chemical industry. Bearing wear is affected by multiple factors, including operating conditions, environmental conditions, sealing effectiveness, and lubrication. The main causes of wear include the gradual penetration of contaminants into the bearing, insufficient lubrication, and corrosion from condensate or other harmful liquids. This wear leads to increased rolling surface roughness and widened bearing clearance, resulting in increased rolling noise and decreased transmission accuracy.
[0003] In recent years, the industry has invested heavily in improving bearing sealing performance to address bearing wear issues, developing various types of sealed bearings. However, the amount of grease filling (i.e., the proportion of lubricating grease to the internal space of the bearing) directly affects its lubrication effect. Excessive grease filling leads to supersaturation, potentially causing excess grease leakage during initial operation, a rapid increase in bearing cavity temperature, and even bearing seizure. Conversely, insufficient grease filling causes the rolling elements to force grease out of its proper lubrication position during rotation, resulting in inadequate lubrication. This poor lubrication is often a major cause of bearing failure; therefore, improving bearing lubrication conditions is a critical issue that urgently needs to be addressed.
[0004] Currently, in high-pressure roller mill crushing equipment used in mining, the lubrication methods employed for the bearing rotation of the main shaft assembly are relatively simple and singular, lacking effective protection for the bearings. Furthermore, this equipment still uses the traditional method of lubricating grease replenishment, where a certain amount of grease is manually added to critical parts of the equipment based on experience or at fixed time intervals. However, this method heavily relies on long-term accumulated experience and is prone to problems such as over- or under-lubricating grease, or adding it too early or too late. These problems not only hinder the smooth rotation of the bearings but may also adversely affect the normal operation of the equipment.
[0005] Therefore, we propose a sealed bearing structure with automatic lubrication compensation function to solve the above-mentioned technical problems. Utility Model Content
[0006] In order to solve the technical problems existing in the prior art, this utility model proposes a sealed bearing structure with automatic compensation lubrication function.
[0007] The technical solution adopted in this utility model is as follows:
[0008] A sealed bearing structure with automatic lubrication compensation function includes a spindle, a bearing body, and a bearing support. The bearing body is installed at the end of the spindle, and the bearing support is sealed on the outside of the bearing body. A grease lubrication cavity is provided between the outer ring of the bearing body and the bearing support. A through hole communicating with the grease lubrication cavity is opened above the bearing raceway on the outer ring of the bearing body. An oil inlet pipe is connected to the grease lubrication cavity, and the other end of the oil inlet pipe is located on the outer surface of the bearing support. A grease storage cavity is provided between the side of the bearing body away from the spindle and the bearing support. An overflow pipe is connected to the grease storage cavity, and the other end of the overflow pipe is located on the outer surface of the bearing support.
[0009] In a further technical solution, the bearing support includes a support body, a left end cover, and a right end cover. The bearing support is sleeved on the outside of the bearing body. The left end cover and the right end cover are detachably connected to the left and right sides of the support body, respectively. The grease lubrication chamber is located between the outer ring of the bearing body and the support body. The grease storage chamber is located between the bearing body and the right end cover. The oil inlet pipe and the overflow pipe are both located in the support body. The spindle extends into the support body through the left end cover. A sealing element is installed inside the left end cover, and the sealing element is radially engaged with the spindle.
[0010] In a further technical solution, the support body adopts a symmetrical layout.
[0011] In a further technical solution, the sealing element is a rubber ring.
[0012] In a further technical solution, both the oil inlet pipe and the overflow pipe are provided with multiple branch pipes, and the other end of each branch pipe is set on the outer surface of the bearing support.
[0013] In a further technical solution, the oil inlet pipe is connected to a grease fitting on the outer surface of the bearing support.
[0014] In a further technical solution, a track is also included, the bearing support is slidably installed on the track, the bearing support is provided with an oil drain pipe, one end of the oil drain pipe is connected to an overflow pipe, and the other end is set on the top surface of the track.
[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0016] 1. This utility model, through the design of a grease lubrication chamber and a grease storage chamber, realizes automatic compensation when there is too little grease in the bearing body and automatic discharge when there is too much grease, ensuring that the bearing body is always in a good lubrication state, effectively reducing the friction coefficient and wear of the bearing body, and extending the service life of the bearing body.
[0017] 2. This utility model adds new lubricating grease to the grease lubrication chamber periodically until it reaches the preset full level. This process does not rely on experience judgment and effectively avoids the problems of adding too much or too little lubricating grease, as well as improper timing of addition. Compared with traditional grease replenishment methods, this sealed bearing structure avoids the risks of sudden temperature rise in the bearing chamber and bearing seizure caused by excessive grease replenishment. At the same time, it also solves the problem of lubricating grease being squeezed out of the normal lubrication position when grease replenishment is insufficient, which leads to increased radial wear and unstable spindle movement, thereby effectively ensuring the normal operation of the equipment.
[0018] 3. By designing branch pipes, this utility model effectively disperses the flow path of grease, avoiding the risk of grease blockage in a single pipe. This ensures that the sealed bearing structure can smoothly and unobstructedly perform grease replenishment and discharge operations, thereby strongly guaranteeing the long-term stable operation of the equipment. Attached Figure Description
[0019] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a partial cross-sectional schematic diagram of the oil inlet pipe of this utility model from a frontal view.
[0022] Figure 3 This is a partial cross-sectional schematic diagram of the overflow pipe of this utility model from a top view.
[0023] Figure 4 This is a partial cross-sectional view of the oil drain pipe in one embodiment of the present invention.
[0024] Figure 5 This is a schematic diagram of the structure of the bearing support of this utility model;
[0025] Figure 6 This is a schematic diagram of the bearing body of this utility model.
[0026] Reference numerals in the attached drawings: 1-spindle, 2-bearing body, 3-bearing support, 31-support body, 32-left end cover, 33-right end cover, 4-grease lubrication chamber, 5-through hole, 6-oil inlet pipe, 7-grease storage chamber, 8-overflow pipe, 9-seal, 10-grease nipple, 11-track, 12-oil drain pipe. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0028] See Figures 1-6 This utility model provides a sealed bearing structure with automatic compensation lubrication function, including a main shaft 1, a bearing body 2, and a bearing support 3. The bearing body 2 is installed at the end of the main shaft 1, and the bearing support 3 is sealed and sleeved on the outside of the bearing body 2. A grease lubrication cavity 4 is provided between the outer ring of the bearing body 2 and the bearing support 3. A through hole 5 communicating with the grease lubrication cavity 4 is opened above the bearing raceway on the outer ring of the bearing body 2. An oil inlet pipe 6 is connected to the grease lubrication cavity 4. The other end of the oil inlet pipe 6 is provided on the outer surface of the bearing support 3. A grease storage cavity 7 is provided between the side of the bearing body 2 away from the main shaft 1 and the bearing support 3. An overflow pipe 8 is connected to the grease storage cavity 7. The other end of the overflow pipe 8 is provided on the outer surface of the bearing support 3.
[0029] During the continuous rotation of the bearing body 2, although some lubricating grease inevitably seeps out from the gaps at both ends of the bearing body 2, causing the amount of grease inside the bearing body 2 to gradually decrease, this sealed bearing structure effectively solves the problem of excessive or insufficient grease replenishment by compensating for the grease in the bearing body 2. Its specific working principle and usage method are as follows:
[0030] In this sealed bearing structure, the grease lubrication chamber 4 is located between the outer ring of the bearing body 2 and the bearing support 3, and is used to store new lubricating grease. As the heat generated by the rotational friction of the bearing body 2 accumulates, the temperature of the bearing body 2 gradually increases, causing the lubricating grease in the grease lubrication chamber 4 to melt upon heating and seep into the bearing raceway through the through hole 5 on the outer ring of the bearing body 2. This achieves automatic compensation of lubricating grease, ensuring that the bearing body 2 is always in a good lubrication state and effectively avoiding bearing failure caused by insufficient grease replenishment. The grease storage chamber 7 is located between the side of the bearing body 2 away from the main shaft 1 and the bearing support 3. It not only serves as a buffer for lubricating grease but also ensures that the internal grease quantity is reasonable, ensuring lubrication effect. Specifically, when there is too much grease in the bearing body 2, the excess lubricating grease will enter the grease storage chamber 7 through natural flow or pressure. Once the grease in the grease storage chamber 7 exceeds its capacity, the excess lubricating grease will be safely discharged to the outside of the bearing support 3 through the overflow pipe 8, thereby ensuring that the grease quantity in the grease lubrication chamber 4 is always maintained within a safe range, providing continuous and stable lubrication support for the bearing body 2. This sealed bearing structure is connected to the grease lubrication chamber 4 via the oil inlet pipe 6, thus enabling grease replenishment. As the equipment operates and the lubricating grease is consumed, the amount of grease in the grease lubrication chamber 4 gradually decreases. At this time, the operator can use the injection port on the outer surface of the bearing support 3 via the oil inlet pipe 6 to periodically add new lubricating grease to the grease lubrication chamber 4 until it reaches the preset full level. This process does not rely on experience judgment, effectively avoiding problems such as over- or under-lubrication and improper timing of grease addition. Compared with traditional grease replenishment methods, this sealed bearing structure avoids the risks of sudden temperature rise and bearing seizure caused by over-lubrication. It also solves the problem of insufficient grease being squeezed out of the normal lubrication position, leading to increased radial wear and unstable movement of the spindle 1, thereby effectively ensuring the normal operation of the equipment. In summary, this sealed bearing structure, through the design of the grease lubrication chamber 4 and the grease storage chamber 7, achieves automatic compensation when the grease in the bearing body 2 is too low and automatic discharge when there is too much grease, ensuring that the bearing body 2 is always in a good lubrication state, effectively reducing the friction coefficient and wear of the bearing body 2, and extending the service life of the bearing body 2.
[0031] In one specific implementation, see Figures 1-5The bearing support 3 includes a support body 31, a left end cover 32, and a right end cover 33. The bearing support 3 is sleeved on the outside of the bearing body 2. The left end cover 32 and the right end cover 33 are detachably connected to the left and right sides of the support body 31, respectively. The grease lubrication chamber 4 is located between the outer ring of the bearing body 2 and the support body 31. The grease storage chamber 7 is located between the bearing body 2 and the right end cover 33. The oil inlet pipe 6 and the overflow pipe 8 are both arranged inside the support body 31. The spindle 1 extends into the support body 31 through the left end cover 32. A sealing element 9 is assembled inside the left end cover 32. The sealing element 9 is radially engaged with the spindle 1.
[0032] Through the coordinated action of the bearing support body 31, the left end cover 32 and the right end cover 33, the bearing support 3 not only achieves the sealing of the bearing body 2, ensuring the cleanliness of the internal environment, reducing the risk of wear of the bearing body 2, and ensuring the stable operation of the equipment, but also facilitates the installation and disassembly of the bearing support 3, providing great convenience for the daily inspection and maintenance of the bearing sealing structure.
[0033] In one specific embodiment, the support body 31 adopts a symmetrical layout.
[0034] By designing the support body 31 in a symmetrical layout, it is not necessary to distinguish between the positive and negative directions during structural assembly, which simplifies the assembly process and effectively avoids assembly errors caused by misoperation, laying a solid foundation for the correct installation of the bearing support 3 and the stable operation of the equipment.
[0035] In one specific embodiment, the sealing element 9 is a rubber ring.
[0036] Rubber rings have good elasticity and compression deformation capacity, which can fit tightly against the sealing surface to form an effective seal. They are also wear-resistant and high-temperature resistant, which can effectively prevent leakage and meet sealing requirements.
[0037] In one specific implementation, see Figure 2 and Figure 3 Both the oil inlet pipe 6 and the overflow pipe 8 are provided with multiple branch pipes, and the other end of each branch pipe is set on the outer surface of the bearing support 3.
[0038] The oil inlet pipe 6 and overflow pipe 8 are designed with branch pipes to effectively disperse the flow path of grease, which can avoid the risk of grease blockage in a single pipe. This ensures that the sealed bearing structure can perform grease replenishment and discharge operations smoothly and unimpeded, thus strongly guaranteeing the long-term stable operation of the equipment.
[0039] In one specific implementation, see Figure 1 and Figure 2 The oil inlet pipe 6 is connected to a grease nipple 10 on the outer surface of the bearing support 3.
[0040] The grease nipple 10 is connected to the oil inlet pipe 6, allowing operators to easily inject grease into the grease lubrication chamber 4 using tools such as a grease gun. This simplifies the grease replenishment process and improves work efficiency. Furthermore, the grease nipple 10 is equipped with a sealing device to prevent external impurities and moisture from entering the grease lubrication chamber 4, thus avoiding grease contamination, maintaining the cleanliness of the bearing support 3, and extending the service life of the bearing body 2.
[0041] In one specific implementation, see Figure 4 It also includes a track 11, the bearing support 3 is slidably installed on the track 11, the bearing support 3 is provided with an oil drain pipe 12, one end of the oil drain pipe 12 is connected to the overflow pipe 8, and the other end is set on the top surface of the track 11.
[0042] This is a scenario where the equipment is used in a high-pressure roller mill crushing machine in a mine. During the operation of the equipment, the grease in the overflow pipe 8 can not only be discharged from the bearing support 3, but also flow to the top surface of the track 11 through the oil drain pipe 12. The top surface of the track 11 and the bottom surface of the bearing support 3 are sealed by grease lubrication, which can prevent debris from entering the track 11 surface, making the sliding between the track 11 and the bearing support 3 more stable. It also realizes the reuse of resources and improves the overall environmental performance of the equipment.
[0043] 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 description and drawings of this utility model, 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 sealed bearing structure with automatic lubrication compensation function, characterized in that, The assembly includes a spindle (1), a bearing body (2), and a bearing support (3). The bearing body (2) is installed at the end of the spindle (1). The bearing support (3) is sealed on the outside of the bearing body (2). A grease lubrication cavity (4) is provided between the outer ring of the bearing body (2) and the bearing support (3). A through hole (5) communicating with the grease lubrication cavity (4) is provided above the bearing raceway on the outer ring of the bearing body (2). An oil inlet pipe (6) is provided in the grease lubrication cavity (4). The other end of the oil inlet pipe (6) is located on the outer surface of the bearing support (3). A grease storage cavity (7) is provided between the side of the bearing body (2) away from the spindle (1) and the bearing support (3). An overflow pipe (8) is provided in the grease storage cavity (7). The other end of the overflow pipe (8) is located on the outer surface of the bearing support (3).
2. The sealed bearing structure with automatic lubrication compensation function according to claim 1, characterized in that, The bearing support (3) includes a support body (31), a left end cover (32) and a right end cover (33). The bearing support (3) is sleeved on the outside of the bearing body (2). The left end cover (32) and the right end cover (33) are detachably connected to the left and right sides of the support body (31), respectively. The grease lubrication chamber (4) is located between the outer ring of the bearing body (2) and the support body (31). The grease storage chamber (7) is located between the bearing body (2) and the right end cover (33). The oil inlet pipe (6) and the overflow pipe (8) are both set inside the support body (31). The spindle (1) passes through the left end cover (32) and extends into the support body (31). A seal (9) is installed inside the left end cover (32). The seal (9) is radially engaged with the spindle (1).
3. A sealed bearing structure with automatic lubrication compensation function according to claim 2, characterized in that, The support body (31) adopts a symmetrical layout.
4. A sealed bearing structure with automatic lubrication compensation function according to claim 2, characterized in that, The sealing element (9) is a rubber ring.
5. A sealed bearing structure with automatic lubrication compensation function according to claim 1, characterized in that, Both the oil inlet pipe (6) and the overflow pipe (8) are provided with multiple branch pipes, and the other end of each branch pipe is set on the outer surface of the bearing support (3).
6. A sealed bearing structure with automatic lubrication compensation function according to claim 1, characterized in that, The oil inlet pipe (6) is connected to a grease nipple (10) on the outer surface of the bearing support (3).
7. A sealed bearing structure with automatic lubrication compensation function according to any one of claims 1-6, characterized in that, It also includes a track (11), the bearing support (3) is slidably installed on the track (11), the bearing support (3) is provided with an oil drain pipe (12), one end of the oil drain pipe (12) is connected to the overflow pipe (8), and the other end is set on the top surface of the track (11).