A sliding bearing
By introducing annular and spiral oil injection channels and seepage holes into the sliding bearing, the problem of uneven lubricant supply is solved, achieving uniform distribution and stable oil film of lubricant, thereby improving the service life and operational stability of the bearing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINCHANG RUICHUANG MASCH CO LTD
- Filing Date
- 2025-10-17
- Publication Date
- 2026-07-14
AI Technical Summary
The lubrication method of traditional sliding bearings leads to uneven lubrication supply. Too much lubricating oil in some areas causes leakage and waste, while insufficient lubricating oil in other areas leads to increased friction and heat accumulation, affecting the normal operation and service life of the bearing.
A three-dimensional lubrication network combining annular and spiral oil injection channels with multiple oil seepage holes was designed to ensure that lubricating oil is evenly distributed on the contact surface between the bearing bush and the rotating shaft, forming a stable oil film and avoiding local dry friction.
It achieves uniform distribution of lubricating oil, reduces frictional loss, extends the service life of bearings and rotating shafts, and prevents lubricating oil leakage and increased stirring resistance.
Smart Images
Figure CN224497141U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bearing technology, and in particular to a sliding bearing. Background Technology
[0002] In many industrial fields such as machinery manufacturing, metallurgy, mining, textiles, and shipbuilding, sliding bearings are key basic components that support rotating shaft systems, transmit loads, and reduce frictional losses. Their operational stability and lubrication reliability directly affect the working efficiency, service life, and safety performance of the entire mechanical equipment.
[0003] Traditional sliding bearings typically use simple oil holes or grooves to introduce lubricating oil. Due to the relative movement between the bearing shell and the journal, the lubricating oil is easily affected by various factors such as centrifugal force, pressure gradient, and surface tension when entering the friction area. This results in some areas having an excessive supply of lubricating oil while others have an insufficient supply. This uneven lubricating oil supply is particularly noticeable in high-speed rotating sliding bearings. Excessive lubricating oil accumulates at the edge of the bearing shell, causing waste and leakage, and also increases the bearing's stirring resistance, leading to increased power loss. In areas with insufficient lubricating oil, the coefficient of friction between the bearing shell and the journal increases significantly, generating excessive heat, accelerating component wear, and even causing serious failures such as bearing failure, severely affecting the normal operation and service life of the bearing. Utility Model Content
[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a sliding bearing that can solve the problem that the traditional sliding bearing lubrication method mostly uses a simple oil hole or oil groove structure to introduce lubricating oil. Due to the relative movement between the bearing shell and the journal, the lubricating oil is easily affected by various factors such as centrifugal force, pressure gradient and surface tension when entering the friction area, resulting in some areas having too much lubricating oil and others having too little. In high-speed rotating sliding bearings, this uneven lubricating oil supply phenomenon is particularly obvious. Too much lubricating oil will accumulate at the edge of the bearing shell, causing lubricating oil waste and leakage, and will also increase the stirring resistance of the bearing, resulting in increased power loss. In areas with insufficient lubricating oil supply, the friction coefficient between the bearing shell and the journal will increase significantly, generating excessive heat, accelerating the wear of parts, and even causing serious failures such as bearing shell burnout, which seriously affects the normal operation and service life of the bearing.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a sliding bearing, comprising:
[0006] A fixed base plate is fixedly connected to the top of the fixed base plate, and a bearing cover is installed on the top of the bearing cover;
[0007] The bearing housing contains a lower bearing shell, and the bearing cover contains an upper bearing shell. Both sides of the bearing housing and bearing cover have limit grooves. Both sides of the upper and lower bearing shells are fixedly connected to limit rings. The four limit rings are slidably adapted to the interior of the corresponding limit grooves. Both the outer surfaces of the upper and lower bearing shells have annular oil injection channels and spiral oil injection channels. The interiors of the two spiral oil injection channels and the two annular oil injection channels have multiple oil seepage holes.
[0008] Preferably, each of the four limiting grooves has a sealing groove inside, and each of the four sealing grooves has a rubber sealing strip slidably connected inside, and each of the four rubber sealing strips is fixedly connected to the corresponding limiting ring.
[0009] Preferably, both the bearing housing and the bearing cover have two connecting holes, and the bottom of the fixed base plate has an installation groove.
[0010] Preferably, the bearing housing has two screws that are slidably connected inside, and the top ends of the two screws extend slidably into the connecting holes on the bearing cover. The bearing cover is installed on the bearing housing by the two screws.
[0011] Preferably, the top of the bearing housing is fixedly connected to two sealing gaskets, and the bottom of the bearing cover is fixedly connected to two identical sealing gaskets, with the two sealing gaskets on the bearing housing corresponding to and abutting the two sealing gaskets on the bearing cover.
[0012] Preferably, the bearing cover has an oil injection hole at its top, which is connected to the interior of the bearing cover.
[0013] Preferably, the oil injection hole is internally threaded with a sealing bolt.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. This sliding bearing, through the annular and spiral oil injection channels on the outer surfaces of the upper and lower bearing shells, together with multiple oil seepage holes, forms a three-dimensional lubrication network: the annular oil injection channels allow the lubricating oil to be evenly distributed along the circumference of the bearing shell, while the spiral oil injection channels guide the lubricating oil to diffuse along the axial direction of the bearing shell. The combination of the two allows the lubricating oil to penetrate into the contact surface between the bearing shell and the rotating shaft in all directions through the oil seepage holes, ensuring that a stable oil film can be formed on the entire contact surface of the rotating shaft, avoiding the aggravation of wear caused by local dry friction, and significantly extending the service life of the bearing shell and the rotating shaft. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0018] Figure 2This is a schematic diagram of the bottom structure of the fixed base plate of this utility model;
[0019] Figure 3 This is a schematic diagram of the bearing housing structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the lower bearing structure of this utility model;
[0021] Figure 5 For the present utility model Figure 3 A magnified structural diagram of point A in the middle.
[0022] Reference numerals in the attached drawings: 1. Bearing housing; 2. Bearing cap; 3. Sealing bolt; 4. Connecting hole; 5. Upper bearing shell; 6. Lower bearing shell; 7. Mounting groove; 8. Screw; 9. Fixing base plate; 10. Oil injection hole; 11. Limiting groove; 12. Spiral oil injection channel; 13. Annular oil injection channel; 14. Limiting ring; 15. Rubber sealing strip; 16. Sealing gasket; 17. Oil seepage hole; 18. Sealing groove. Detailed Implementation
[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.
[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0027] Please see Figure 1-5This utility model provides a technical solution: a sliding bearing, comprising:
[0028] A fixed base plate 9 is fixedly connected to the top of the fixed base plate 9, and a bearing cover 2 is installed on the top of the bearing cover 1.
[0029] The bearing housing 1 has a lower bearing shell 6 installed inside, and the bearing cover 2 has an upper bearing shell 5 installed inside. Both sides of the bearing housing 1 and the bearing cover 2 have limit grooves 11. Both sides of the upper bearing shell 5 and the lower bearing shell 6 are fixedly connected to limit rings 14. The four limit rings 14 are all slidably adapted to the interior of the corresponding limit grooves 11. Both the outer surfaces of the upper bearing shell 5 and the lower bearing shell 6 have annular oil injection channels 13 and spiral oil injection channels 12. Both the two spiral oil injection channels 12 and the two annular oil injection channels 13 have multiple oil seepage holes 17 inside.
[0030] Each of the four limiting grooves 11 has a sealing groove 18 inside, and each of the four sealing grooves 18 has a rubber sealing strip 15 slidably connected inside. Each of the four rubber sealing strips 15 is fixedly connected to the corresponding limiting ring 14.
[0031] Both the bearing housing 1 and the bearing cover 2 have two connecting holes 4. The bottom of the fixed base plate 9 has an installation groove 7. The bearing housing 1 is slidably connected to two screws 8. The top ends of the two screws 8 extend into the connecting holes 4 on the bearing cover 2. The bearing cover 2 is installed on the bearing housing 1 by the two screws 8.
[0032] Two sealing gaskets 16 are fixedly connected to the top of the bearing housing 1, and two identical sealing gaskets 16 are fixedly connected to the bottom of the bearing cover 2. The two sealing gaskets 16 on the bearing housing 1 correspond to and are attached to the two sealing gaskets 16 on the bearing cover 2. An oil injection hole 10 is provided on the top of the bearing cover 2. The oil injection hole 10 is connected to the interior of the bearing cover 2. A sealing bolt 3 is threadedly connected to the interior of the oil injection hole 10.
[0033] Furthermore, when using this device, the entire sliding bearing is first positioned and installed on the base of the target equipment, such as a machine tool or motor frame, by means of the mounting groove 7 opened at the bottom of the fixed base plate 9, thus completing the initial fixing of the bearing; then the lower bearing shell 6 is placed inside the bearing seat 1, ensuring that the limiting rings 14 on both sides of the lower bearing shell 6 slide and adapt to the limiting grooves 11 on both sides of the bearing seat 1. The lateral displacement of the lower bearing shell 6 is restricted by the cooperation of the limiting rings 14 and the limiting grooves 11. At the same time, the rubber sealing strip 15 on the limiting ring 14 will be stuck into the corresponding sealing groove 18 due to elastic deformation.
[0034] Next, place the rotating shaft to be supported on top of the lower bearing shell 6, and then cover the rotating shaft with the upper bearing shell 5, so that the limiting rings 14 on both sides of the upper bearing shell 5 are correspondingly engaged in the limiting grooves 11 on both sides of the bearing cover 2, while ensuring that the two sealing gaskets 16 on the top of the bearing seat 1 correspond to and are in contact with the two sealing gaskets 16 on the bottom of the bearing cover 2; finally, slide the two screws 8 upward from the inside of the bearing seat 1 and insert them into the connecting holes 4 on the bearing cover 2, and tighten the nuts at the top of the screws to make the bearing cover 2 firmly installed on the bearing seat 1, completing the assembly and fixing of the entire bearing. At this time, the upper bearing shell 5 and the lower bearing shell 6 together wrap around the rotating shaft to form a stable support structure.
[0035] When the bearing needs lubrication, first unscrew the sealing bolt 3 connected to the internal thread of the oil injection hole 10, and inject lubricating oil into the bearing cover 2 through the oil injection hole 10 on the top of the bearing cover 2. The injected lubricating oil first flows into the annular oil injection channel 13 and the spiral oil injection channel 12 opened on the outer surface of the upper bearing shell 5. At the same time, because the upper bearing shell 5 and the lower bearing shell 6 are tightly fitted, some lubricating oil will penetrate into the annular oil injection channel 13 and the spiral oil injection channel 12 of the lower bearing shell 6. Then, the lubricating oil evenly penetrates to the contact surface of the upper bearing shell 5, the lower bearing shell 6 and the rotating shaft through the multiple oil seepage holes 17 opened inside the annular oil injection channel 13 and the spiral oil injection channel 12 on the two bearing shells. When the rotating shaft starts to rotate, the lubricating oil on the contact surface forms a stable oil film under the action of friction, reducing the direct friction between the rotating shaft and the bearing shell, and realizing lubrication protection. After the oil injection is completed, screw the sealing bolt 3 back into the oil injection hole 10 to prevent lubricating oil leakage and impurities from entering.
[0036] During bearing operation, multiple sealing structures work together to ensure the stability of the lubrication system and the internal environment of the bearing: on the one hand, the sealing gaskets 16 that are in contact with each other between the bearing housing 1 and the bearing cover 2 can block the gap between the upper and lower mating surfaces of the bearing and prevent lubricating oil from leaking from the mating surfaces; on the other hand, the sealing groove 18 opened inside the limiting groove 11 slides and adapts to the rubber sealing strip 15 fixedly connected to the limiting ring 14, and fills the gap between the limiting ring 14 and the limiting groove 11 through the rubber sealing strip 15.
[0037] The annular oil injection channel 13 and the spiral oil injection channel 12 opened on the outer surface of the upper bearing shell 5 and the lower bearing shell 6, together with multiple oil seepage holes 17, form a three-dimensional lubrication network: the annular oil injection channel 13 can make the lubricating oil evenly distributed along the circumference of the bearing shell, while the spiral oil injection channel 12 can guide the lubricating oil to diffuse along the axial direction of the bearing shell. The combination of the two allows the lubricating oil to penetrate into the contact surface between the bearing shell and the rotating shaft in all directions through the oil seepage holes 17, ensuring that a stable oil film can be formed on the entire contact surface of the rotating shaft, avoiding the aggravation of wear caused by local dry friction, and significantly extending the service life of the bearing shell and the rotating shaft.
[0038] Structural Description: Bearing Housing 1: As the core support component of the bearing, it is used to accommodate and install the lower bearing shell 6. At the same time, the limiting grooves 11 on both sides can cooperate with the limiting rings 14 of the lower bearing shell 6 to limit the lateral displacement of the lower bearing shell 6. The top can dock with the bearing cover 2, and the screw 8 can be slidably connected inside to provide a foundation for fixing the bearing cover 2. At the same time, the sealing gasket 16 fixed on its top can fit with the sealing gasket 16 of the bearing cover 2 to achieve sealing of the upper and lower mating surfaces.
[0039] Bearing cover 2: Used to cover the top of bearing housing 1, the upper bearing shell 5 can be installed inside, the limiting grooves 11 on both sides can cooperate with the limiting rings 14 of the upper bearing shell 5 to limit the lateral displacement of the upper bearing shell 5; an oil injection hole 10 is provided on the top, which can be used as a channel for lubricating oil injection; and the connecting hole 4 provided on it can allow the screw 8 to pass through, so as to fix it to the bearing housing 1; the sealing gasket 16 fixed at the bottom can fit with the sealing gasket 16 of the bearing housing 1 to enhance the sealing of the upper and lower mating surfaces;
[0040] Sealing bolt 3: The threaded connection is inside the oil filling hole 10. After oil filling is completed, it can be screwed into the oil filling hole 10 to prevent lubricating oil from leaking from the oil filling hole 10, and at the same time block external dust and moisture from entering the bearing through the oil filling hole 10.
[0041] Connection hole 4: It is opened on the bearing housing 1 and the bearing cover 2. The connection hole 4 on the bearing cover 2 allows the top end of the screw 8 to slide through, providing a passage for the screw 8 to fix the bearing cover 2, and ensuring that the bearing cover 2 can be firmly installed on the bearing housing 1.
[0042] Upper bearing shell 5: Installed inside the bearing cover 2, it works with the lower bearing shell 6 to wrap around the rotating shaft and provide a support surface for the rotating shaft; the limiting rings 14 fixed on both sides can be adapted to the limiting grooves 11 of the bearing cover 2 to prevent lateral displacement; the annular oil injection channel 13 and the spiral oil injection channel 12 opened on the outer surface can hold lubricating oil, and the internal oil seepage hole 17 can guide the lubricating oil to the contact surface with the rotating shaft to help form an oil film;
[0043] Lower bearing shell 6: Installed inside the bearing housing 1, it works with the upper bearing shell 5 to wrap around the rotating shaft and provide a bottom support surface for the rotating shaft; the limiting rings 14 fixed on both sides can be adapted to the limiting grooves 11 of the bearing housing 1 to prevent lateral displacement; the annular oil injection channel 13 and the spiral oil injection channel 12 opened on the outer surface can receive the lubricating oil that seeps from the upper bearing shell 5, and the internal oil seepage hole 17 can guide the lubricating oil to the contact surface with the rotating shaft to help form an oil film;
[0044] Mounting slot 7: Located at the bottom of the fixed base plate 9, it is used to position and install the entire sliding bearing on the base of the target equipment such as machine tool or motor frame, providing initial fixation for the bearing and ensuring accurate bearing installation.
[0045] Screw 8: It is slidably connected inside the bearing housing 1, and its top end can slide into the connecting hole 4 of the bearing cover 2. By tightening the nut at the top of the screw, the bearing cover 2 can be firmly fixed on the bearing housing 1, realizing the assembly and fixation of the upper and lower parts of the bearing.
[0046] Fixed base plate 9: The bearing housing 1 is fixedly connected to the top, providing stable support for the bearing housing 1; the mounting groove 7 opened at the bottom can assist in the overall positioning and installation of the bearing, and is a bridge connecting the bearing and the target equipment base, ensuring that the bearing is installed firmly.
[0047] Oil injection hole 10: It is located on the top of the bearing cover 2 and communicates with the inside of the bearing cover 2. It can serve as a channel for injecting lubricating oil, making it convenient to inject lubricating oil into the bearing. At the same time, it can be threaded to connect the sealing bolt 3 to achieve sealing after oil injection.
[0048] Limiting grooves 11: respectively opened on both sides of bearing housing 1 and bearing cover 2, can slide and adapt to the limiting rings 14 of upper bearing shell 5 and lower bearing shell 6, limit the lateral displacement of upper bearing shell 5 and lower bearing shell 6, and prevent the bearing shells from shifting due to vibration; the sealing groove 18 opened inside can accommodate the rubber sealing strip 15, providing space for lateral gap sealing.
[0049] Spiral oil injection channel 12: It is opened on the outer surface of the upper bearing 5 and the lower bearing 6. It can hold lubricating oil, guide the lubricating oil to diffuse along the axial direction of the bearing, ensure that the lubricating oil is evenly distributed in the axial direction of the bearing, and assist the oil seepage hole 17 in delivering the lubricating oil to the contact surface of the rotating shaft.
[0050] Annular oil injection channel 13: It is opened on the outer surface of the upper bearing 5 and the lower bearing 6, which can hold lubricating oil and guide the lubricating oil to be evenly distributed along the circumference of the bearing, ensuring that the lubricating oil is evenly distributed in the circumference of the bearing, and assisting the oil seepage hole 17 to deliver the lubricating oil to the contact surface of the rotating shaft.
[0051] Limiting ring 14: It is fixed on both sides of the upper bearing shell 5 and the lower bearing shell 6 respectively, and can slide and adapt to the limiting groove 11 of the bearing seat 1 and the bearing cover 2 to limit the lateral displacement of the upper bearing shell 5 and the lower bearing shell 6 and ensure the stability of the bearing shell position; at the same time, the rubber sealing strip 15 fixed on it can cooperate with the sealing groove 18 to achieve lateral gap sealing.
[0052] Rubber sealing strip 15: It is fixedly connected to the corresponding limiting ring 14 and can be slidably connected inside the sealing groove 18. It fills the gap between the limiting ring 14 and the limiting groove 11 through its own elastic deformation, preventing lubricating oil from leaking from the mating part of the bearing bush and the bearing seat / bearing cover, while blocking external impurities from entering the interior of the bearing bush.
[0053] Sealing gasket 16: It is fixed on the top of the bearing housing 1 and the bottom of the bearing cover 2 respectively, and the sealing gasket 16 on the bearing housing 1 and the sealing gasket 16 on the bearing cover 2 correspond to and are attached to each other. It can block the gap between the upper and lower mating surfaces of the bearing housing 1 and the bearing cover 2, prevent lubricating oil from leaking from the mating surface, and at the same time block external dust and moisture from entering the bearing.
[0054] Oil seepage hole 17: It is opened inside the spiral oil injection channel 12 and the annular oil injection channel 13. It can guide the lubricating oil in the annular oil injection channel 13 and the spiral oil injection channel 12 to the contact surface of the upper bearing 5, the lower bearing 6 and the rotating shaft, and provide a lubricating oil delivery channel for oil film formation.
[0055] Sealing groove 18: It is formed inside the limiting groove 11 and can accommodate the rubber sealing strip 15. It provides installation and positioning space for the rubber sealing strip 15, ensuring that the rubber sealing strip 15 can stably fill the gap between the limiting ring 14 and the limiting groove 11, and ensuring the lateral sealing effect.
[0056] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A sliding bearing, characterized in that, include: A fixed base plate (9) is fixedly connected to the top of the fixed base plate (9), and a bearing cover (2) is installed on the top of the bearing cover (1). The bearing housing (1) is equipped with a lower bearing shell (6), and the bearing cover (2) is equipped with an upper bearing shell (5). Limiting grooves (11) are opened on both sides of the bearing housing (1) and the bearing cover (2). Limiting rings (14) are fixedly connected to both sides of the upper bearing shell (5) and the lower bearing shell (6). The four limiting rings (14) are all adapted to slide inside the corresponding limiting grooves (11). Among them, annular oil injection channels (13) and spiral oil injection channels (12) are provided on the outer surfaces of the upper bearing (5) and the lower bearing (6), and multiple oil seepage holes (17) are provided inside the two spiral oil injection channels (12) and the two annular oil injection channels (13).
2. A sliding bearing according to claim 1, characterized in that: Each of the four limiting grooves (11) has a sealing groove (18) inside, and each of the four sealing grooves (18) has a rubber sealing strip (15) slidably connected inside, and each of the four rubber sealing strips (15) is fixedly connected to the corresponding limiting ring (14).
3. A sliding bearing according to claim 1, characterized in that: Both the bearing housing (1) and the bearing cover (2) have two connecting holes (4), and the bottom of the fixed base plate (9) has an installation groove (7).
4. A sliding bearing according to claim 3, characterized in that: The bearing housing (1) is internally connected to two screws (8), the top ends of which slide into the connecting holes (4) on the bearing cover (2). The bearing cover (2) is installed on the bearing housing (1) by the two screws (8).
5. A sliding bearing according to claim 1, characterized in that: Two sealing gaskets (16) are fixedly connected to the top of the bearing housing (1), and two identical sealing gaskets (16) are fixedly connected to the bottom of the bearing cover (2). The two sealing gaskets (16) on the bearing housing (1) correspond to and are attached to the two sealing gaskets (16) on the bearing cover (2).
6. A sliding bearing according to claim 1, characterized in that: The bearing cover (2) has an oil injection hole (10) on its top, and the oil injection hole (10) is connected to the interior of the bearing cover (2).
7. A sliding bearing according to claim 6, characterized in that: The oil injection hole (10) is internally threaded with a sealing bolt (3).