Large-bearing-capacity self-lubricating sliding bearing and assembling method thereof

Abstract

The invention discloses a high-bearing-capacity self-lubricating sliding bearing and an assembling method thereof. The high-bearing-capacity self-lubricating sliding bearing comprises a bearing seat, a bearing cover and a bearing bush sleeve, wherein the bearing seat and the bearing cover are connected through a bolt; the bearing bush sleeve is tightly attached to the inner wall of the bearing seat and the inner wall of the bearing cover and is composed of two bearing bushes which are vertically spliced; the lining is connected to the inner wall of the bearing bush in a sliding mode and used for being in interference fit with an external rotating shaft and enabling the external rotating shaft to stably slide on the inner wall of the bearing bush, an oil slinger is connected to the middle of the outer wall of the lining in a sleeving mode, and oil slingers are symmetrically connected to the positions, close to the end face, of the outer wall of the lining in a sleeving mode, so that matched composite self-lubrication of the oil slinger and the oil slingers is achieved. And the lubricating unit is mounted on one side of the bearing seat and provides lubricating oil for the contact surface of the bearing bush and the bushing. The composite structure of the oil slinger and the oil slinger is used, so that internal lubricating oil can uniformly flow between the bushing and the bearing bush, and the service life of the whole sliding bearing is prolonged.

Description

Technical Field

[0001] This invention relates to the field of bearing application technology, and in particular to a high-load-capacity self-lubricating sliding bearing and its assembly method. Background Technology

[0002] As a key basic component in mechanical transmission systems, sliding bearings are widely used in major equipment fields such as heavy machinery, high-speed motors, wind power generation, and ship propulsion.

[0003] Traditional sliding bearings often face problems such as insufficient lubrication, high temperature, large wear, and short life under high-speed and heavy-load conditions. Especially under high load or frequent start-stop conditions, the lubricating oil film is difficult to form stably, which can easily lead to direct contact between the bearing surfaces, aggravate wear, and even cause seizing failure. Although some bearings with self-lubricating or forced lubrication structures exist in the existing technology, they still have problems such as uneven lubrication, complex oil circuits, difficult maintenance, and high energy consumption.

[0004] Therefore, this invention proposes a high-load-capacity self-lubricating sliding bearing and its assembly method. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a high load-bearing capacity self-lubricating sliding bearing and its assembly method. The composite structure of oil slinger ring and oil slinger disc is used to enable the internal lubricating oil to flow uniformly between the bushing and the bearing shell, thereby improving the service life of the entire sliding bearing.

[0006] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is to provide a high load-bearing capacity self-lubricating sliding bearing, including a bearing housing and a bearing cap connected by bolts; A bearing bush that fits tightly against the inner wall of the bearing housing and bearing cover and consists of two upper and lower spliced ​​bearing bushes; A bushing that is slidably connected to the inner wall of the bearing sleeve and is used for interference fit connection of an external rotating shaft and to allow it to slide stably on the inner wall of the bearing sleeve; An oil slinger ring is fitted at the middle of the outer wall of the bushing, and an oil slinger disc is symmetrically fitted at the end face of the outer wall to achieve composite self-lubrication by matching the oil slinger ring and the oil slinger disc. A lubrication unit installed on one side of the bearing housing to provide lubricating oil to the contact surface between the bearing bush and the bushing.

[0007] The present invention is further configured such that: mounting lugs are symmetrically fixedly connected to both sides of the bottom of the bearing seat, and mounting holes with raised reinforcing parts are provided in the middle of both mounting lugs.

[0008] The above technical solution uses a symmetrical design for the mounting lugs, which allows the load to be evenly distributed at the bottom of the bearing housing, avoiding unilateral force that could cause the bearing housing to tilt or deform, and ensuring the overall stability of the bearing's installation posture.

[0009] The present invention is further configured such that: the outer wall of the bearing bush is symmetrically and fixedly connected with limiting edges near the end face, and is installed inside the positioning grooves A and B opened at corresponding positions on the inner wall of the bearing seat and bearing cover through the two limiting edges; The bearing bush sleeve has symmetrically fixed stop blocks at the middle positions of both sides of the lower bearing bush, and the two stop blocks are respectively engaged with the stop grooves on the top of the bearing seat that are adapted to them.

[0010] Through the above technical solution, the fitting structure of the limiting edge and positioning groove A and positioning groove B, through the wrapping limiting of the limiting edge by the positioning groove, strictly limits the radial displacement of the bearing bush in the cavity formed by the bearing seat and bearing cover, avoids the bearing bush from becoming eccentric due to equipment vibration or load fluctuation, ensures that the lubrication gap between the inner wall of the bearing bush and the outer wall of the bushing is uniform, and prevents lubrication failure caused by excessively small local gaps. The locking structure between the stop block and the stop groove prevents the bearing sleeve from rotating synchronously with the bushing by blocking the axial movement of the stop block through the stop groove. This avoids relative friction between the bearing sleeve and the inner wall of the bearing housing and bearing cover. At the same time, it prevents the oil passages such as the oil filling groove and the oil support groove inside the bearing sleeve from being disconnected from the oil filling hole of the bearing cover due to rotational misalignment, thus ensuring unobstructed lubricating oil delivery channels.

[0011] The present invention is further configured such that: an oil injection groove is provided through the top of the upper bearing bush inside the bearing bush sleeve, the oil injection groove is connected to the oil injection hole opened in the middle of the bearing cover, and obliquely arranged oil support grooves are symmetrically opened on both sides of the oil injection groove; a connecting oil groove is symmetrically opened on the inner wall of the bearing bush sleeve near the end face, which is connected to the two supporting oil grooves respectively, and two oil slingers are respectively movable inside the connecting oil grooves.

[0012] Through the above technical solution, the oil injection hole serves as the lubricating oil input port. By directly connecting with the oil injection groove, it ensures that the lubricating oil delivered by the lubrication unit can quickly enter the bearing sleeve, avoiding oil supply delay caused by the detour of the oil circuit. The angled oil groove can guide the lubricating oil in the oil filling groove to the end face area of ​​the inner wall of the bearing sleeve. The angled design can balance gravity drive and inertial drive, so that the lubricating oil can flow slowly by gravity when static, and can accelerate to the end face by the inertia of the lubricating oil when the bearing is running, ensuring timely supply of lubricating oil to the end face area. The connecting oil groove has a dual function of "lubricating oil storage" and "oil slinger movement space": on the one hand, it stores the lubricating oil delivered by the supporting oil groove, providing a continuous source of lubricating medium for the oil slinger; on the other hand, it provides rotation space for the oil slinger, so that when the oil slinger rotates with the bushing, it can fully contact the lubricating oil in the connecting oil groove, and use centrifugal force to evenly spread the lubricating oil to the end face friction surfaces of the bushing and the bearing sleeve, achieving comprehensive lubrication of the end face friction area.

[0013] The present invention is further configured such that: an oil outlet hole is provided at the center of the bottom of the lower bearing bush inside the bearing bush sleeve, and the oil outlet hole is connected to the oil drain hole provided at the corresponding position of the bearing seat, and the oil drain hole is connected to the lubrication unit.

[0014] With the above technical solution, the oil outlet is opened at the center of the bottom of the lower bearing bush, which can maximize the coverage of the lubricating oil collection area and ensure that excess lubricating oil can flow completely into the oil outlet. This avoids local overheating caused by the accumulation of lubricating oil inside the bearing bush or the impact of oxidation on the performance of the lubricating oil. The coaxial connection design of the oil outlet and the drain hole ensures that the lubricating oil can flow from the bearing bush into the bearing housing without obstruction, and then enter the lubrication unit through the drain hole.

[0015] The present invention is further configured such that: an annular oil groove is formed in the middle of the outer wall of the bushing, and both sides of the annular oil groove are inclined surfaces; The outer wall of the bushing is symmetrically fixedly connected with limiting rings near the annular oil groove, and the two limiting rings are slidably connected to the inner wall of the limiting groove opened at the corresponding position on the inner wall of the bearing sleeve. The outer wall of the bushing is symmetrically provided with oil grooves near the end face, and the opposite sides of the two oil grooves are both set with slopes. The outer wall of the bushing is uniformly provided with multiple guide grooves in the circumferential direction, and the multiple guide grooves pass through two limiting rings respectively, and connect the ring oil groove and the plate oil groove.

[0016] Through the above technical solution, the inclined surface of the annular oil groove can change the flow direction of the lubricating oil, so that the lubricating oil in the annular oil groove flows along the inclined surface to the middle friction surface between the bushing and the bearing sleeve when the bushing rotates, thereby improving the adhesion of the lubricating oil on the middle friction surface, ensuring the formation of a stable and uniform oil film in the middle region, and reducing the friction coefficient in the middle. The sliding fit between the limiting ring and the limiting groove restricts the axial movement of the bushing within the bearing sleeve by axial constraint of the limiting ring through the limiting groove. This prevents the bushing from reducing the contact area of ​​the friction surface due to axial displacement, while ensuring that the bushing and the bearing sleeve always remain concentric, ensuring uniform lubrication clearance, and preventing excessive local clearance from causing oil film rupture. The inclined design of the oil pan groove is similar to that of the annular oil groove. The inclined surface guides the lubricating oil to flow to the end face friction surface, storing sufficient lubricating oil for end face lubrication. In addition, the position of the oil pan groove is adapted to the oil slinger, which can ensure that the oil slinger can fully contact the lubricating oil and improve the lubrication efficiency of the oil slinger. By connecting the oil groove and the oil pan groove through the limiting ring, the lubricating oil in the middle oil groove and the end face oil pan groove can flow to each other, realizing the dynamic balance of the amount of lubricating oil in the middle and the end face, avoiding insufficient lubrication due to excessive local lubricating oil consumption, and ensuring that the entire friction surface of the bearing can obtain sufficient lubrication.

[0017] The present invention is further configured such that: the oil-slinging ring is sleeved on the inner wall of the oil-slinging groove, and multiple sets of oil-slinging blades are uniformly fixedly connected to the outer peripheral wall of the oil-slinging ring, and each set of oil-slinging blades is relatively inclined arc-shaped.

[0018] With the above technical solution, when the bushing rotates with the external rotating shaft, the oil slinger ring, because it is in contact with the inner wall of the oil groove, rotates synchronously with the bushing. The oil slinger blades on the outer circumference of the oil slinger ring will generate centrifugal force. The inclined arc design of the oil slinger blades will throw the lubricating oil in the oil groove outward, avoiding the uneven oil film thickness caused by the lubricating oil being concentrated in a certain area. At the same time, the uniform distribution of multiple sets of oil slinger blades ensures that the amount of lubricating oil thrown in the circumferential direction of the bushing is consistent, so that a wide-coverage and stable-thickness oil film is formed on the central friction surface, improving the lubrication reliability of the bearing under high-speed operation.

[0019] The present invention is further configured such that: the two oil-slinging discs are respectively sleeved on the inner walls of the two oil troughs, the outer peripheral walls of the two oil-slinging discs are both chamfered and the two chamfered surfaces are arranged opposite each other, and multiple flow guide ribs are uniformly fixedly connected to the chamfered surfaces of the two oil-slinging discs in the circumferential direction, and the flow guide ribs are inclined in the direction of bushing rotation.

[0020] Through the above technical solution, the chamfered bevel of the outer peripheral wall of the oil slinger is adapted to the bevel of the oil groove. On the one hand, it can maximize the lubricating oil storage space between the oil slinger and the oil groove, and reserve sufficient lubricating medium for end face lubrication. On the other hand, the beveled structure can guide the lubricating oil to move towards the outer periphery of the oil slinger under the action of centrifugal force, ensuring that the lubricating oil can quickly reach the contact area between the oil slinger and the bearing sleeve. The inclined guide ribs act like a "scraper," actively scraping the lubricating oil from the oil pan and guiding it into the guide channel through their own tilt angle. This active guide method prevents excessive splashing and loss of lubricating oil due to centrifugal force, ensuring that the end face friction surface always has a sufficient amount of lubricating oil.

[0021] The present invention is further configured such that: the lubrication unit includes an oil tank installed on the side wall of the bearing housing, and an oil pump is provided inside the oil tank; The bottom of the oil tank is connected to a drain pipe, which is installed inside an inclined groove on the side wall of the bearing housing and extends to the bottom of the bearing housing, while being connected to the oil drain hole. The top of the oil tank is provided with an oil injection pipe connected to the oil pump. The end face of the oil injection pipe is connected to an interface and is installed inside the oil injection hole through the interface. A filter element is provided inside the oil injection hole and is pressed against the bottom of the interface.

[0022] Through the above technical solution, the oil tank serves as the central storage hub for lubricating oil. The built-in oil pump pressurizes the lubricating oil in the tank through a "pressure-driven" method, and then delivers it to the oil filling hole of the bearing cap through the oil filling pipe and interface. The pressure oil supply can ensure that the lubricating oil can overcome gravity and pipeline resistance and reach the oil filling groove of the bearing sleeve quickly and stably, meeting the large and continuous demand for lubricating oil on the friction surface under high load and high speed conditions, and avoiding insufficient oil supply caused by gravity oil supply. The filter element can filter out impurities such as metal shavings and dust in the lubricating oil before it enters the bearing sleeve; The inclined angle design of the slanted pipe groove can accelerate the flow speed of lubricating oil flowing out of the oil drain hole in the drainage pipe, avoiding the blockage caused by lubricating oil stagnation and accumulation in the pipeline. The drainage pipe is directly connected to the bottom of the oil tank, which can directly guide the recovered lubricating oil into the oil tank, realize the recycling of lubricating oil, reduce lubrication costs, and reduce waste oil discharge.

[0023] On the other hand, a method for assembling a high-load-capacity self-lubricating sliding bearing is provided, including the following steps: S1. Clean the positioning groove A, stop groove and oil drain hole on the inner wall of the bearing housing to ensure that there are no impurities or burrs. S2. Align the stop block of the lower bearing bush inside the bearing bush sleeve with the stop groove of the bearing seat, and slowly insert it so that the limiting edge of the lower bearing bush is fully engaged in the positioning groove A and the oil outlet hole is coaxial with the oil outlet hole of the bearing seat. S3. Clean the annular oil groove, disc oil groove and guide groove of the bushing, and apply a small amount of grease to the inner wall of the bushing. S4. Slowly fit the oil slinger ring into the oil groove, ensuring that the oil slinger blades of the oil slinger ring are not deformed and that the gap between the oil slinger ring and the inner wall of the oil groove is uniform. S5. Fit the two oil slingers into the oil grooves at both ends of the bushing, and adjust the direction of the guide support of the oil slingers to be consistent with the preset rotation direction of the bushing. S6. Slowly insert the assembled oil-slinging structure bushing into the inner wall of the lower bearing, ensuring that the bushing's limiting ring is aligned with the lower bearing's limiting groove. Avoid collisions with the oil-slinging blades and guide supports during the insertion process. S7. Take the upper bearing shell, align its oil filling groove with the direction of the oil filling hole of the subsequent bearing cover, and cover it on the top of the bushing so that the limiting edge of the upper bearing shell is engaged in the positioning groove A of the bearing seat. At this time, the upper and lower bearing shells of the bearing shell sleeve are spliced. S8. Clean the positioning groove B and oil filling hole of the bearing cover, put the bearing cover on the bearing seat, so that the positioning groove B and the limiting edge of the bearing bush are fully engaged, and use bolts to bolt the bearing cover to the top of the bearing seat. S9. Fix the oil tank to the preset installation position on the side wall of the bearing housing, insert the drain pipe into the inclined groove of the bearing housing, so that one end of the drain pipe is connected to the oil drain hole and the other end is connected to the bottom interface of the oil tank. S10. Install the filter into the oil filling hole of the bearing cover, insert the interface of the oil filling pipe into the oil filling hole, ensure that the interface is sealed with the oil filling hole, and finally connect the other end of the oil filling pipe to the oil pump outlet in the oil tank to complete the entire assembly operation.

[0024] The beneficial effects of this invention are as follows: 1. The present invention proposes a high load-bearing capacity self-lubricating sliding bearing and its assembly method. Through the composite oil-throwing structure of oil-throwing ring and oil-throwing disc, combined with the full-area oil circuit design, the lubricating oil can be efficiently covered and recovered. The arc-shaped blades of the oil-throwing ring can throw the lubricating oil to the middle of the bearing to form a stable oil film. The guide ribs of the oil-throwing disc can guide the lubricating oil to the end face and eliminate the lubrication blind zone. 2. The high load-bearing capacity self-lubricating sliding bearing and its assembly method proposed in this invention form a multi-layer anti-displacement mechanism through the bolt pre-tightening design of the bearing housing and bearing cover, the limiting and stopping structure of the bearing bush, and the cooperation between the bushing limiting ring and the bearing bush limiting groove, thereby ensuring operational stability under vibration conditions. 3. The high load-bearing capacity self-lubricating sliding bearing and its assembly method proposed in this invention, by using a lubrication unit, enables the lubricating oil to be recycled through the guide groove and the return oil hole, thereby reducing the consumption of lubricating oil and improving the service life of the sliding bearing. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a first cross-sectional structural diagram of the present invention; Figure 4 This is a second cross-sectional view of the present invention; Figure 5 This is an exploded view of the bearing housing and bearing bush in this invention; Figure 6 This is a schematic diagram showing the installation of the bushing, oil slinger ring, and oil slinger disc in this invention. Figure 7 This is a structural diagram of the bushing in this invention; Figure 8 This is a structural diagram of the oil-slinging ring in this invention; Figure 9 This is a structural diagram of the oil slinger in this invention; Figure 10 This is a structural diagram of the lubrication unit in this invention.

[0026] In the diagram: 1. Bearing housing; 11. Mounting lug; 12. Positioning groove A; 13. Stop groove; 14. Oil drain hole; 15. Pipe groove; 2. Bearing cap; 21. Oil filling hole; 22. Positioning groove B; 3. Bearing sleeve; 31. Limiting edge; 32. Stop block; 33. Connecting oil groove; 34. Limiting groove; 35. Oil outlet hole; 36. Oil filling groove; 37. Support oil groove; 4. Bushing; 41. Annular oil groove; 42. Limiting ring; 43. Disc oil groove; 44. Guide groove; 5. Oil slinger ring; 51. Oil slinger blade; 6. Oil slinger; 61. Flow guide rib; 7. Lubrication unit; 71. Oil tank; 72. Drain pipe; 73. Oil injection pipe; 74. Interface; 75. Filter element. Detailed Implementation

[0027] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0028] like Figure 1-Figure 5 As shown, a high load-bearing capacity self-lubricating sliding bearing includes a bearing housing 1 and a bearing cover 2 connected by bolts. The bottom sides of the bearing housing 1 are symmetrically fixed with mounting lugs 11, and the middle of each mounting lug 11 is provided with a mounting hole for a raised reinforcing part. The mounting lugs 11 adopt a symmetrical design, which can make the load evenly distributed at the bottom of the bearing housing 1, avoid the bearing housing 1 from tilting or deforming due to unilateral force, and ensure the overall installation posture of the bearing is stable. The bearing sleeve 3 is tightly fitted to the inner wall of the bearing housing 1 and the bearing cover 2 and is composed of two upper and lower spliced ​​bearing bushes. The outer wall of the bearing sleeve 3 is symmetrically fixedly connected with limiting edges 31 near the end face. The two limiting edges 31 are installed inside the positioning grooves A12 and B22 opened at corresponding positions on the inner wall of the bearing housing 1 and the bearing cover 2. The fitting structure of the limiting edge 31 with the positioning grooves A12 and B22, through the wrapping limiting of the limiting edge 31 by the positioning grooves, strictly limits the radial displacement of the bearing sleeve 3 in the cavity formed by the bearing housing 1 and the bearing cover 2, avoids the bearing sleeve 3 from becoming eccentric due to equipment vibration or load fluctuation, ensures that the lubrication gap between the inner wall of the bearing sleeve 3 and the outer wall of the bushing 4 is uniform, and prevents lubrication failure due to excessively small local gaps. Among them, the lower bearing bush 3 is provided with symmetrically fixed stop blocks 32 at the middle position of both sides of the lower bearing bush, and the two stop blocks 32 are respectively engaged with the stop groove 13 at the top of the bearing seat 1. The engagement structure of the stop block 32 and the stop groove 13 prevents the bearing bush 3 from rotating synchronously with the bushing 4 by blocking the stop block 32 axially through the stop groove 13, avoiding relative friction between the bearing bush 3 and the inner wall of the bearing seat 1 and the bearing cover 2, and at the same time preventing the oil passages such as the oil filling groove 36 and the oil support groove 37 inside the bearing bush 3 from being disconnected from the oil filling hole 21 of the bearing cover 2 due to rotational misalignment, thus ensuring the smooth flow of lubricating oil. The top of the upper bearing bush inside the bearing bush 3 is provided with an oil filling groove 36, which is connected to the oil filling hole 21 in the middle of the bearing cover 2. The oil filling hole 21 serves as the lubricating oil input port. Through direct connection with the oil filling groove 36, it ensures that the lubricating oil delivered by the lubrication unit 7 can quickly enter the interior of the bearing bush 3, avoiding oil supply delay caused by the detour of the oil path. The oil filling groove 36 is symmetrically provided with inclined support grooves 37 on both sides. The inclined support grooves 37 can guide the lubricating oil in the oil filling groove 36 to the end face area of ​​the inner wall of the bearing sleeve 3. The inclined angle design can balance gravity drive and inertia drive, so that the lubricating oil can flow slowly by gravity when static, and can accelerate to the end face by the inertia of the lubricating oil when the bearing is running, ensuring timely supply of lubricating oil to the end face area. The inner wall of the bearing sleeve 3 is symmetrically provided with connecting oil grooves 33 near the end face, which are respectively connected to two oil support grooves 37. The two oil slingers 6 are respectively movable inside the connecting oil grooves 33. The connecting oil grooves 33 have the dual functions of "lubricating oil storage" and "moving space for oil slingers 6": on the one hand, they store the lubricating oil delivered by the oil support grooves 37, providing a continuous source of lubricating medium for the oil slingers 6; on the other hand, they provide rotation space for the oil slingers 6, so that when the oil slingers 6 rotate with the bushing 4, they can fully contact the lubricating oil in the connecting oil grooves 33, and use centrifugal force to evenly spread the lubricating oil to the end face friction surfaces of the bushing 4 and the bearing sleeve 3, so as to achieve comprehensive lubrication of the end face friction area.

[0029] like Figures 3-5 As shown, an oil outlet 35 is provided at the center of the bottom of the lower bearing bush inside the bearing bush 3, and the oil outlet 35 is connected to the corresponding oil drain hole 14 in the bearing housing 1. At the same time, the oil drain hole 14 is connected to the lubrication unit 7. The oil outlet 35 is located at the center of the bottom of the lower bearing bush, which can maximize the coverage of the lubricating oil collection area and ensure that excess lubricating oil can flow completely into the oil outlet 35. This avoids local overheating caused by the accumulation of lubricating oil inside the bearing bush 3, or the impact of oxidation on the performance of the lubricating oil. The coaxial connection design of the oil outlet 35 and the oil drain hole 14 ensures that the lubricating oil can flow from the bearing bush 3 into the bearing housing 1 without obstruction, and then enter the lubrication unit 7 through the oil drain hole 14.

[0030] like Figures 6-9 As shown, a bushing 4 is slidably connected to the inner wall of the bearing sleeve 3 and is used for interference connection of an external rotating shaft and to allow it to slide stably on the inner wall of the bearing sleeve 3. An annular oil groove 41 is provided in the middle of the outer wall of the bushing 4, and both sides of the annular oil groove 41 are inclined. The inclined surface of the annular oil groove 41 can change the flow direction of the lubricating oil, so that when the bushing 4 rotates, the lubricating oil in the annular oil groove 41 flows along the inclined surface to the middle friction surface between the bushing 4 and the bearing sleeve 3, thereby improving the adhesion of the lubricating oil on the middle friction surface, ensuring the formation of a stable and uniform oil film in the middle area, and reducing the friction coefficient in the middle. A limiting ring 42 is symmetrically fixedly connected to the outer wall of the bushing 4 near the annular oil groove 41. The two limiting rings 42 are slidably connected to the inner wall of the corresponding limiting groove 34 on the inner wall of the bearing sleeve 3. The sliding fit between the limiting ring 42 and the limiting groove 34 restricts the axial movement of the bushing 4 in the bearing sleeve 3 by limiting the axial displacement of the bushing 4. This prevents the bushing 4 from reducing the contact area of ​​the friction surface due to axial displacement. At the same time, it ensures that the bushing 4 and the bearing sleeve 3 always remain concentric, ensuring uniform lubrication clearance and preventing excessive local clearance from causing oil film rupture. The outer wall of the bushing 4 is symmetrically provided with oil grooves 43 near the end face. The opposite sides of the two oil grooves 43 are set with slopes. The slope design of the oil grooves 43 is the same as that of the annular oil grooves 41. The slope guides the lubricating oil to flow to the end face friction surface, storing sufficient lubricating oil for end face lubrication. The position of the oil grooves 43 is adapted to the oil slinger 6, which can ensure that the oil slinger 6 can fully contact the lubricating oil and improve the lubrication efficiency of the oil slinger 6. Multiple guide grooves 44 are evenly provided on the outer circumference of the bushing 4, and the multiple guide grooves 44 pass through two limiting rings 42 respectively, and connect the annular oil groove 41 and the disc oil groove 43. By passing through the limiting rings 42, the annular oil groove 41 and the disc oil groove 43 are connected, so that the lubricating oil in the middle annular oil groove 41 and the end face disc oil groove 43 can flow to each other, realize the dynamic balance of the amount of lubricating oil in the middle and the end face, avoid insufficient lubrication due to excessive local lubricating oil consumption, and ensure that the entire friction surface of the bearing can obtain sufficient lubrication.

[0031] like Figure 6 As shown, an oil slinger ring 5 is sleeved at the middle of the outer wall of the bushing 4, and an oil slinger disc 6 is symmetrically sleeved near the end face of the outer wall, so as to achieve a composite self-lubrication by matching the oil slinger ring 5 and the oil slinger disc 6.

[0032] like Figures 6-8 As shown, the oil slinger ring 5 is sleeved on the inner wall of the oil groove 41, and multiple sets of oil slinger blades 51 are evenly fixedly connected to the outer circumferential wall of the oil slinger ring 5. Each set of oil slinger blades 51 is relatively inclined arc-shaped. When the bushing 4 rotates with the external rotating shaft, the oil slinger ring 5 is in contact with the inner wall of the oil groove 41 and rotates synchronously with the bushing 4. The oil slinger blades 51 on the outer circumference of the oil slinger ring 5 will generate centrifugal force. The inclined arc-shaped design of the oil slinger blades 51 will throw the lubricating oil in the oil groove 41 outward, avoiding the uneven oil film thickness caused by the lubricating oil being concentrated in a certain area. At the same time, the even distribution of multiple sets of oil slinger blades 51 ensures that the amount of lubricating oil thrown in the circumferential direction of the bushing 4 is consistent, so that the oil film with a wide coverage and stable thickness is formed on the middle friction surface, improving the lubrication reliability of the bearing under high-speed operation. like Figure 6 , Figure 7 and Figure 9As shown, two oil slingers 6 are respectively fitted onto the inner walls of two oil grooves 43. The outer peripheral walls of the two oil slingers 6 are both chamfered and the two chamfers are arranged opposite each other. The chamfered surface of the outer peripheral wall of the oil slinger 6 is adapted to the chamfer of the oil groove 43. On the one hand, it can maximize the lubricating oil storage space between the oil slinger 6 and the oil groove 43, so as to reserve sufficient lubricating medium for end face lubrication. On the other hand, the chamfer structure can guide the lubricating oil to move towards the outer periphery of the oil slinger 6 under the action of centrifugal force, so as to ensure that the lubricating oil can quickly reach the contact area between the oil slinger 6 and the bearing sleeve 3. Meanwhile, multiple guide ribs 61 are uniformly fixedly connected to the inclined surfaces of the two oil slingers 6 in the circumferential direction, and the guide ribs 61 are inclined in the rotation direction of the bushing 4. The inclined guide ribs 61 will act like a "scraper" to actively scrape the lubricating oil in the oil groove 43 of the disc, and guide the lubricating oil to the guide groove 44 through their own tilt angle. This active guide method can avoid excessive splashing and loss of lubricating oil due to centrifugal force, and ensure that the end face friction surface always maintains a sufficient amount of lubricating oil.

[0033] like Figure 1 , Figure 3 and Figure 10 As shown, a lubrication unit 7 is installed on one side of the bearing housing 1 and provides lubricating oil to the contact surface between the bearing bush 3 and the bushing 4. The lubrication unit 7 includes an oil tank 71 installed on the side wall of the bearing housing 1, and an oil pump is installed inside the oil tank 71. The bottom of the oil tank 71 is connected to a drain pipe 72, which is installed inside an inclined groove 15 opened on the side wall of the bearing housing 1 and extends to the bottom of the bearing housing 1. It is also connected to the oil drain hole 14. The inclined angle design of the inclined groove 15 can accelerate the flow speed of the lubricating oil flowing out of the oil drain hole 14 in the drain pipe 72, and avoid the lubricating oil from stagnating and accumulating in the pipeline, which would cause pipeline blockage. The drain pipe 72 is directly connected to the bottom of the oil tank 71, which can directly guide the recovered lubricating oil into the oil tank 71, realize the recycling of lubricating oil, reduce lubrication costs, and reduce waste oil discharge. The top of the oil tank 71 is equipped with an oil injection pipe 73 connected to the oil pump. The end face of the oil injection pipe 73 is connected to an interface 74 and is installed inside the oil injection hole 21 through the interface 74. The oil injection hole 21 is equipped with a filter element 75, which is pressed against the bottom of the interface 74. The filter element 75 can filter out metal debris, dust and other impurities in the lubricating oil before the lubricating oil enters the bearing sleeve 3. The oil tank 71 serves as the central storage hub for lubricating oil. The built-in oil pump pressurizes the lubricating oil in the oil tank 71 through a "pressure drive" method and then delivers it to the oil injection hole 21 of the bearing cover 2 through the oil injection pipe 73 and the interface 74. The pressure oil supply can ensure that the lubricating oil can overcome gravity and pipeline resistance and quickly and stably reach the oil injection groove 36 of the bearing sleeve 3, meeting the large and continuous demand for lubricating oil on the friction surface under high load and high speed conditions, and avoiding insufficient oil supply caused by gravity oil supply.

[0034] like Figures 1-10 As shown, an assembly method for a high-load-capacity self-lubricating sliding bearing includes the following steps: S1. Clean the positioning groove A12, stop groove 13 and oil drain hole 14 on the inner wall of bearing housing 1 to ensure that there are no impurities or burrs. S2. Align the stop block 32 of the lower bearing bush inside the bearing bush sleeve 3 with the stop groove 13 of the bearing seat, and slowly insert it so that the limiting edge 31 of the lower bearing bush is completely inserted into the positioning groove A12 and the oil hole 35 is coaxial with the oil drain hole 14 of the bearing seat 1. S3. Clean the annular oil groove 41, disc oil groove 43 and guide groove 44 of the bushing 4, and apply a small amount of grease to the inner wall of the bushing 4 to facilitate subsequent interference fit with the external rotating shaft. S4. Slowly fit the oil slinger ring 5 into the oil ring groove 41 to ensure that the oil slinger blades 51 of the oil slinger ring are not deformed and that the gap between the oil slinger ring 5 and the inner wall of the oil ring groove 41 is uniform. S5. Fit the two oil slingers 6 into the oil grooves 43 at both ends of the bushing 4 respectively, and adjust the direction of the guide ribs 61 of the oil slingers 6 so that they are consistent with the preset rotation direction of the bushing 4. S6. Slowly insert the assembled oil-slinging structure bushing 4 into the inner wall of the lower bearing, ensuring that the limiting ring 42 of the bushing 4 is aligned with the limiting groove 34 of the lower bearing. Avoid collisions with the oil-slinging blade 51 and the guide support 61 during the insertion process. S7. Take the upper bearing shell, align its oil filling groove 36 with the direction of the oil filling hole 21 of the subsequent bearing cover 2, and cover it on the bushing 4 so that the limiting edge 31 of the upper bearing shell is inserted into the positioning groove A12 of the bearing seat 1. At this time, the upper and lower bearing shells of the bearing shell sleeve 3 are spliced. S8. Clean the positioning groove B22 and oil filling hole 21 of the bearing cover 2, cover the bearing cover 2 on the bearing seat 1, so that the positioning groove B22 and the limiting edge 31 of the bearing bush 3 are fully engaged, and use bolts to bolt the bearing cover 2 to the top of the bearing seat 1. S9. Fix the oil tank 71 to the preset installation position on the side wall of the bearing housing 1, insert the drain pipe 72 into the inclined groove 15 of the bearing housing 1, so that one end of the drain pipe 72 is connected to the oil drain hole 14 and the other end is connected to the bottom interface of the oil tank. S10. Install the filter element 75 into the oil filling hole 21 of the bearing cover 2, insert the interface 74 of the oil filling pipe 73 into the oil filling hole 21, ensure that the interface 74 is sealed with the oil filling hole 21, and finally connect the other end of the oil filling pipe 73 to the oil pump outlet in the oil tank to complete the entire assembly operation.

[0035] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A high-load-capacity self-lubricating sliding bearing, characterized in that: include The bearing housing (1) and bearing cap (2) are bolted together; A bearing bush (3) is tightly fitted to the inner wall of the bearing housing (1) and the bearing cover (2) and is composed of two upper and lower spliced ​​bearing bushes. A bushing (4) that is slidably connected to the inner wall of the bearing sleeve (3) and is used to interference fit an external rotating shaft and to allow it to slide stably on the inner wall of the bearing sleeve (3). The bushing (4) is fitted with an oil slinger ring (5) at the middle of its outer wall and an oil slinger disc (6) is fitted symmetrically near the end face of its outer wall to achieve a composite self-lubricating effect where the oil slinger ring (5) and the oil slinger disc (6) are matched. A lubrication unit (7) is installed on one side of the bearing housing (1) and provides lubricating oil to the contact surface between the bearing bush (3) and the bushing (4).

2. The high-load-capacity self-lubricating sliding bearing according to claim 1, characterized in that: The bearing housing (1) has mounting lugs (11) symmetrically fixedly connected on both sides of its bottom, and the two mounting lugs (11) each have mounting holes with raised reinforcing parts in the middle.

3. The high-load-capacity self-lubricating sliding bearing according to claim 1, characterized in that: The outer wall of the bearing sleeve (3) is symmetrically fixedly connected with a limiting edge (31) near the end face, and is installed inside the positioning groove A (12) and positioning groove B (22) opened at the corresponding positions on the inner wall of the bearing seat (1) and bearing cover (2) through the two limiting edges (31); Among them, the bearing sleeve (3) has symmetrically fixed stop blocks (32) at the middle positions of the two sides of the lower bearing bush, and the two stop blocks (32) are respectively engaged and connected to the stop groove (13) at the top of the bearing seat (1) that is compatible with it.

4. The high-load-capacity self-lubricating sliding bearing according to claim 3, characterized in that: The upper bearing bush inside the bearing bush (3) has an oil injection groove (36) that runs through the top of the upper bearing bush. The oil injection groove (36) is connected to the oil injection hole (21) in the middle of the bearing cover (2). The oil injection groove (36) has obliquely arranged support oil grooves (37) on both sides. The inner wall of the bearing bush (3) has a connecting oil groove (33) that is symmetrically connected to the two support oil grooves (37) near the end face. The two oil slingers (6) are respectively movable inside the connecting oil grooves (33).

5. A high-load-capacity self-lubricating sliding bearing according to claim 4, characterized in that: The bearing sleeve (3) has an oil outlet hole (35) at the center of the bottom of the lower bearing, and the oil outlet hole (35) is connected to the oil drain hole (14) opened at the corresponding position of the bearing seat (1), and the oil drain hole (14) is connected to the lubrication unit (7).

6. A high-load-capacity self-lubricating sliding bearing according to claim 5, characterized in that: The bushing (4) has an annular oil groove (41) in the middle of its outer wall, and both sides of the annular oil groove (41) are inclined. The outer wall of the bushing (4) is symmetrically fixedly connected to the oil groove (41) with a limiting ring (42), and the two limiting rings (42) are slidably connected to the inner wall of the limiting groove (34) opened at the corresponding position on the inner wall of the bearing sleeve (3); The outer wall of the bushing (4) is symmetrically provided with oil grooves (43) near the end face, and the opposite sides of the two oil grooves (43) are both set with slopes. The bushing (4) has multiple guide grooves (44) evenly distributed on the outer wall circumferentially, and the multiple guide grooves (44) pass through two limiting rings (42) respectively, while connecting the ring oil groove (41) and the plate oil groove (43).

7. A high-load-capacity self-lubricating sliding bearing according to claim 6, characterized in that: The oil-slinging ring (5) is sleeved on the inner wall of the oil ring groove (41), and multiple sets of oil-slinging blades (51) are uniformly fixedly connected to the outer peripheral wall of the oil-slinging ring (5). Each set of oil-slinging blades (51) is relatively inclined arc-shaped.

8. A high-load-capacity self-lubricating sliding bearing according to claim 6, characterized in that: The two oil-slinging discs (6) are respectively fitted onto the inner walls of the two oil troughs (43). The outer peripheral walls of the two oil-slinging discs (6) are both chamfered and the two chamfers are arranged opposite each other. At the same time, multiple flow guides (61) are uniformly fixedly connected in the circumferential direction on the chamfers of the two oil-slinging discs (6), and the flow guides (61) are inclined in the rotation direction of the bushing (4).

9. A high-load-capacity self-lubricating sliding bearing according to claim 5, characterized in that: The lubrication unit (7) includes an oil tank (71) installed on the side wall of the bearing housing (1), and an oil pump is installed inside the oil tank (71); The bottom of the oil tank (71) is connected to a drain pipe (72), which is installed inside the inclined groove (15) opened on the side wall of the bearing seat (1) and extends to the bottom of the bearing seat (1), while communicating with the oil drain hole (14). The top of the oil tank (71) is provided with an oil injection pipe (73) connected to the oil pump. The end face of the oil injection pipe (73) is connected to an interface (74) and is installed inside the oil injection hole (21) through the interface (74). The inside of the oil injection hole (21) is provided with a filter element (75) and the filter element (75) is pressed against the bottom of the interface (74).

10. An assembly method for a high-load-capacity self-lubricating sliding bearing according to any one of claims 1-9, characterized in that: Includes the following steps: S1. Clean the positioning groove A (12), stop groove (13) and oil drain hole (14) on the inner wall of the bearing housing (1) to ensure that there are no impurities or burrs. S2. Align the stop block (32) of the lower bearing bush inside the bearing bush sleeve (3) with the stop groove (13) of the bearing seat, and slowly insert it so that the limiting edge (31) of the lower bearing bush is completely inserted into the positioning groove A (12) and the oil outlet (35) is coaxial with the oil drain hole (14) of the bearing seat (1). S3. Clean the annular oil groove (41), disc oil groove (43) and guide groove (44) of the bushing (4), and apply a small amount of grease to the inner wall of the bushing (4) (to facilitate subsequent interference fit with the external rotating shaft). S4. Slowly fit the oil slinger ring (5) into the oil ring groove (41) to ensure that the oil slinger blade (51) of the oil slinger ring is not deformed and that the gap between the oil slinger ring (5) and the inner wall of the oil ring groove (41) is uniform. S5. Fit the two oil slingers (6) into the oil grooves (43) at both ends of the bushing (4), and adjust the direction of the guide support (61) of the oil slinger (6) so that it is consistent with the preset rotation direction of the bushing (4). S6. Slowly insert the assembled oil-slinging structure bushing (4) into the inner wall of the lower bearing, ensuring that the limiting ring (42) of the bushing (4) is aligned with the limiting groove (34) of the lower bearing. Avoid collisions with the oil-slinging blade (51) and the guide support (61) during the insertion process. S7. Take the upper bearing shell, align its oil filling groove (36) with the direction of the oil filling hole (21) of the subsequent bearing cover (2), and cover it above the bushing (4) so ​​that the limiting edge (31) of the upper bearing shell is inserted into the positioning groove A (12) of the bearing seat (1). At this time, the upper and lower bearing shells of the bearing shell sleeve (3) are spliced. S8. Clean the positioning groove B (22) and oil injection hole (21) of the bearing cover (2), cover the bearing cover (2) on the bearing seat (1), so that the positioning groove B (22) and the limiting edge (31) of the bearing bush (3) are fully engaged, and use bolts to bolt the bearing cover (2) to the top of the bearing seat (1). S9. Fix the oil tank (71) to the preset installation position on the side wall of the bearing seat (1), insert the drain pipe (72) into the inclined groove (15) of the bearing seat (1), so that one end of the drain pipe (72) is connected to the oil drain hole (14) and the other end is connected to the bottom interface of the oil tank. S10. Install the filter (75) into the oil filling hole (21) of the bearing cover (2), insert the interface (74) of the oil filling pipe (73) into the oil filling hole (21), ensure that the interface (74) is sealed with the oil filling hole (21), and finally connect the other end of the oil filling pipe (73) to the oil pump outlet in the oil tank to complete the entire assembly operation.

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