Sliding bearing arrangement and gear box

Abstract

The application belongs to the technical field of high-speed transmission, and discloses a sliding bearing structure and a gear box, the sliding bearing structure comprising a bearing body and a plurality of circumferentially arranged bearing pads; a plurality of oil inlet channels are arranged at intervals on the outer periphery of the bearing body; the plurality of circumferentially arranged bearing pads are arranged on the inner wall of the bearing body, and the plurality of bearing pads enclose a space for accommodating a support shaft; an oil pocket is arranged at one end of the inner periphery of each bearing pad along the circumferential direction of the bearing pad, and the oil pocket and the oil inlet channel are arranged in one-to-one correspondence and are in communication, so as to guide lubricating oil to the inner periphery of the bearing pad; an oil discharging structure is arranged at the other end of the inner periphery of each bearing pad along the circumferential direction of the bearing pad, and adjacent oil pockets and oil discharging structures are arranged separately; the oil discharging structure is used for discharging the lubricating oil after the lubrication of the inner periphery of the bearing pad is completed. The sliding bearing structure avoids the high-temperature lubricating oil of the previous bearing pad from entering the next bearing pad, improves the lubricating effect, the carrying capacity and the service life of the sliding bearing structure, and further improves the reliability of the gear box.

Description

Technical Field

[0001] This invention relates to the field of high-speed transmission technology, and in particular to a sliding bearing structure and a gearbox. Background Technology

[0002] In high-speed transmission fields, such as gear drives, sliding bearings have extremely wide applications. As the requirements for high-speed transmissions become more demanding, the requirements for the lubrication efficiency and load-bearing capacity of sliding bearings are also increasing.

[0003] A typical sliding bearing consists of multiple ring-shaped bushings connected together. Each bushing has an oil sac on its inner wall, with an oil inlet hole connecting to the external oil passage of the sliding bearing. During operation, the shaft that mates with the sliding bearing rotates, causing lubricating oil to enter from the oil sac and cool the bushing circumferentially. The high-temperature lubricating oil may then enter the oil sac of the next bushing connected to it as the shaft rotates. This high-temperature lubricating oil mixes with the newly entering cooling lubricating oil, causing the temperature of the lubricating oil entering the bushing to exceed the set value. This reduces the cooling and lubrication effect of the lubricating oil on the bushing, thus requiring a larger amount of lubricating oil to achieve the desired cooling and lubrication effect. However, this increases the required lubricating oil volume and lowers the lubrication efficiency of the sliding bearing, ultimately reducing its load-bearing capacity.

[0004] Therefore, there is an urgent need for a sliding bearing structure and a gearbox to solve the above-mentioned technical problems. Summary of the Invention

[0005] One objective of this invention is to provide a sliding bearing structure that prevents high-temperature lubricating oil from the previous bearing from entering the next bearing, thereby improving the lubrication effect, load-bearing capacity, and service life of the sliding bearing structure.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The sliding bearing structure includes:

[0008] The bearing body has multiple oil inlet channels spaced apart on its outer periphery.

[0009] Multiple circumferentially arranged bearing bushes are disposed on the inner wall of the bearing body. Each bearing bush has an oil bladder at one end along its own circumference and an oil discharge structure at the other end. Adjacent oil bladders and oil discharge structures are separated. The oil bladders and oil inlet channels are connected in a one-to-one correspondence to introduce lubricating oil into the inner circumference of the bearing bush. The oil discharge structure is used to discharge the lubricating oil after the inner circumference of the bearing bush has been lubricated.

[0010] Optionally, the above-mentioned oil unloading structure includes:

[0011] An oil distribution groove is formed on the inner circumferential surface of the aforementioned bearing bush. The two ends of the oil distribution groove extend through the aforementioned bearing bush along the axial direction of the aforementioned bearing body. The oil distribution groove is used to collect the high-temperature lubricating oil after the inner circumference of the aforementioned bearing bush has been lubricated.

[0012] Oil drain grooves are provided at both ends of the bearing body along its own axial direction. The oil drain grooves are connected to the oil distribution grooves and are used to drain the high-temperature lubricating oil in the oil distribution grooves.

[0013] Optionally, the bottom and / or at least one wall of the unloading tank described above have an incline for guiding oil.

[0014] Optionally, the opening size of the oil unloading groove gradually increases radially from the inner circumference of the bearing body toward the outer circumference of the bearing body.

[0015] Optionally, the depth of the oil unloading groove gradually decreases along the circumference of the bearing body from one side closer to the oil distribution groove toward the other side.

[0016] Optionally, the depth of the oil unloading groove gradually increases radially from the inner circumference of the bearing body toward the outer circumference of the bearing body.

[0017] Optionally, the oil bladder is provided with baffles on the side facing the oil unloading structure and on both sides of the oil bladder along the axial direction of the bearing body, so as to separate adjacent oil bladders and oil unloading structures.

[0018] Optionally, the oil bladder has an arc-shaped portion on the side near the bearing shell to guide lubricating oil into the bearing shell.

[0019] Optionally, the thickness of the bearing gradually increases from the oil bladder toward the oil unloading structure, so that the inner circumferential surface of the bearing forms an oil guide portion.

[0020] One object of the present invention is to provide a gearbox including a support shaft and a sliding bearing structure as described in any of the above embodiments, wherein the sliding bearing structure is disposed on the outer periphery of the support shaft. This gearbox can improve the lubrication effect, load-bearing capacity, and service life of the sliding bearing structure, thereby improving the reliability of the gearbox.

[0021] The beneficial effects of this invention are:

[0022] This invention provides a sliding bearing structure and a gearbox. When lubricating the internal support shaft and itself, lubricating oil enters the oil bladder through a single channel, then flows into the inner circumference of the corresponding bearing bush, thus lubricating the support shaft and the bearing bush. The lubricating oil that has lubricated the bearing bush flows to an oil discharge structure, where the high-temperature lubricating oil is discharged. The oil discharge structure and the oil bladder are separated, preventing the high-temperature lubricating oil collected in the oil discharge structure from flowing into the oil bladder of the next bearing bush. This ensures that the high-temperature lubricating oil after lubrication does not mix with the cold lubricating oil in the oil bladder of the next bearing bush, avoiding the situation where the lubricating oil temperature is too high and the lubrication effect is poor. This improves the lubrication effect of the sliding bearing structure, increases its service life, and also improves its load-bearing capacity, making the sliding bearing structure more reliable. Attached Figure Description

[0023] Figure 1 This is an isometric view of a sliding bearing provided in some embodiments of the present invention;

[0024] Figure 2 This is an isometric view of a sliding bearing provided in some embodiments of the present invention from another perspective;

[0025] Figure 3 This is a side view of a sliding bearing provided in some embodiments of the present invention;

[0026] Figure 4 yes Figure 3 Cross-sectional view at point AA;

[0027] Figure 5 yes Figure 3 Cross-sectional view at point BB;

[0028] Figure 6 This is a schematic line drawing of the inner ring of a sliding bearing provided in some embodiments of the present invention.

[0029] In the picture:

[0030] 10. Bearing body; 11. Oil inlet channel; 111. Oil inlet groove; 112. Oil inlet hole;

[0031] 20. Bearing shell;

[0032] 30. Oil bladder; 31. Oil collection trough; 32. Baffle wall; 33. Arc-shaped part; 34. Oil guide part;

[0033] 40. Oil unloading structure; 41. Oil distribution tank; 42. Oil unloading tank. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0038] The following text refers to Figures 1 to 6 The sliding bearing structure and gearbox provided by this invention will be described in detail.

[0039] Please refer to Figure 1 and Figure 2Specifically, the sliding bearing structure includes a bearing body 10 and multiple circumferentially arranged bearing bushes 20. Multiple oil inlet channels 11 are spaced apart on the outer periphery of the bearing body 10 for lubricating oil to enter the interior of the sliding bearing structure for lubrication. The multiple circumferentially arranged bearing bushes 20 are all disposed on the inner wall of the bearing body 10, forming a space to accommodate a support shaft for contacting and supporting the shaft. Each bearing bush 20 has an oil bladder 30 at one end of its inner periphery, with the oil bladder 30 and oil inlet channels 11 connected in a one-to-one manner to introduce lubricating oil into the inner periphery of the bearing bush 20. Each bearing bush 20 also has an oil discharge structure 40 at the other end of its inner periphery, with adjacent oil bladders 30 and oil discharge structures 40 separated. The oil discharge structure 40 is used to discharge the lubricating oil after lubrication of the inner periphery of the bearing bush 20.

[0040] In this embodiment of the sliding bearing structure, when lubricating the internal support shaft and itself, lubricating oil enters the oil sac 30 through a single channel, and then flows into the inner circumference of the corresponding bearing shell 20 through the oil sac 30, thus lubricating the support shaft and the bearing shell 20. Furthermore, the lubricating oil that has lubricated the bearing shell 20 flows into the oil discharge structure 40, where the high-temperature lubricating oil is discharged. The oil discharge structure 40 and the oil sac 30 are separated, ensuring that the high-temperature lubricating oil collected in the oil discharge structure 40 will not flow into the oil sac 30 of the next bearing shell 20. This ensures that the high-temperature lubricating oil after lubricating the bearing shell 20 will not mix with the cold lubricating oil in the oil sac 30 of the next bearing shell 20, avoiding the situation where the lubricating oil temperature of the bearing shell 20 is too high and the lubrication effect is poor. This improves the lubrication effect of the sliding bearing structure, increases its service life, and also improves its load-bearing capacity, making the sliding bearing structure more reliable.

[0041] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the oil inlet channel 11 includes an oil inlet groove 111 and a plurality of oil inlet holes 112. The oil inlet groove 111 is formed on the outer periphery of the bearing body 10. The oil inlet holes 112 are arranged one-to-one with the oil bladder 30. The plurality of oil inlet holes 112 are spaced apart circumferentially at the bottom of the oil inlet groove 111. The oil inlet holes 112 are connected to the oil bladder 30 and the oil inlet groove 111. The oil inlet groove 111 is used to connect with the external oil circuit so that the lubricating oil of the external oil circuit enters the oil inlet groove 111, thereby allowing the lubricating oil entering the oil inlet groove 111 to enter the oil bladder 30 through the oil inlet holes 112, thereby achieving lubrication of the bearing bush 20 corresponding to the oil bladder 30.

[0042] For example, in this embodiment, there are four bearing shells 20, and four corresponding oil bladders 30, oil discharge structures 40, and oil inlet holes 112, so that each bearing shell 20 corresponds to one oil passage for lubrication and does not interfere with each other. In other embodiments, the number of bearing shells 20, oil bladders 30, oil discharge structures 40, and oil inlet holes 112 can be adapted to actual needs, and no specific limitation is made here.

[0043] Please refer to Figures 2 to 5 In this embodiment, the oil bladder 30 includes an oil collection groove 31, which is connected to the oil inlet channel 11 to achieve a buffering and collection effect on the lubricating oil entering the oil bladder 30.

[0044] Furthermore, the oil bladder 30 is provided with baffles 32 on the side facing the oil unloading structure 40 and on both sides of the oil bladder 30 along the axial direction of the bearing body 10. That is, except for the side facing the oil unloading structure 40 of the same bearing shell 20, the oil collection groove 31 is provided with baffles 32 on the other three sides. This allows the lubricating oil in the oil bladder 30 to only enter one side of the inner wall of the bearing shell 20, so as to separate the adjacent oil bladders 30 and the oil unloading structure 40. At the same time, the oil in the oil bladder 30 will not mix with the high-temperature lubricating oil after the previous bearing shell 20 has been lubricated.

[0045] Furthermore, the oil bladder 30 has an arc-shaped portion 33 on the side near the bearing shell 20, that is, the oil collection groove 31 has an arc-shaped portion 33 on the side facing the oil unloading structure 40 of the same bearing shell 20, forming an oil guiding structure, so that the lubricating oil in the oil bladder 30 can only be guided to the bearing shell 20 through the arc-shaped portion 33, and will not flow outward toward the baffle wall 32.

[0046] Furthermore, the thickness of the bearing bush 20 gradually increases from the oil bladder 30 toward the oil discharge structure 40, so that the inner circumferential surface of the bearing bush 20 forms an oil guide portion 34, making the bearing bush 20 form an arc-shaped oil guide portion 34 for oil passage, which facilitates the lubrication flow of lubricating oil between the bearing bush 20 and the support shaft.

[0047] With the above structure, after the lubricating oil enters the oil collection tank 31 through the oil inlet channel 11, it flows towards the arc-shaped part 33 due to the action of the baffle 32 and the arc-shaped part 33. Then, the lubricating oil is guided by the oil guide part 34, so that it flows between the entire bearing 20 and the support shaft for lubrication. Finally, it flows to the oil discharge structure 40 for oil discharge, so as to guide the flow of lubricating oil and avoid the mixing of lubricating oil between two adjacent bearings 20.

[0048] Please refer to Figures 3 to 6In this embodiment, the oil discharge structure 40 includes an oil distribution groove 41 and an oil discharge groove 42. The oil distribution groove 41 is located on the inner circumferential surface of the bearing bush 20, and its two ends extend through the bearing bush 20 along the axial direction of the bearing body 10. The oil distribution groove 41 is used to collect the high-temperature lubricating oil after the inner circumference of the bearing bush 20 has been lubricated. The oil discharge groove 42 is located at both ends of the bearing body 10 along its own axial direction, and is connected to the oil distribution groove 41. The oil discharge groove 42 is used to discharge the high-temperature lubricating oil from the oil distribution groove 41. With this structure, after the bearing bush 20 has been lubricated, the high-temperature lubricating oil enters the oil distribution groove 41 and then flows out through the oil discharge groove 42, preventing it from entering the oil sac 30 of the next bearing bush 20 and thus not affecting the lubrication of the next bearing bush 20.

[0049] To improve the oil unloading effect of the oil unloading structure 40, the bottom and / or at least one wall of the oil unloading groove 42 are inclined to guide oil, so that the lubricating oil entering the oil distribution groove 41 can quickly enter the oil unloading groove 42 from the oil distribution groove 41 and be quickly discharged through the oil unloading groove 42, avoiding excessive accumulation of high-temperature lubricating oil in the oil distribution groove 41 and entering the oil sac 30 of the next bearing 20, thereby improving the oil unloading effect of the oil unloading structure 40.

[0050] In an optional embodiment, the opening size of the oil unloading groove 42 gradually increases radially from the inner periphery of the bearing body 10 toward the outer periphery of the bearing body 10; that is, at least one groove wall of the oil unloading groove 42 is provided with an inclination, so that the lubricating oil of the oil distribution groove 41 enters the oil unloading groove 42 from the port with a smaller opening size and flows out through the port with a larger opening size. During the rotation of the sliding bearing structure and / or the support shaft, the oil guiding effect of the oil unloading groove 42 is improved, thereby improving the oil unloading effect of the oil unloading structure 40.

[0051] For example, in this embodiment, one of the two opposing walls of the oil unloading groove 42 is a vertical wall and the other is an inclined wall, so as to achieve the effect that the opening size of the oil unloading groove 42 gradually increases from the inner periphery of the bearing body 10 toward the outer periphery of the bearing body 10 along the radial direction of the bearing body 10.

[0052] In an optional embodiment, the depth of the oil unloading groove 42 gradually decreases from the side closer to the oil distribution groove 41 toward the other side along the circumference of the bearing body 10, so that the depth of the oil unloading groove 42 is deeper on the side of the vertical wall and shallower on the side of the inclined wall. During the rotation of the sliding bearing structure and / or the support shaft, after the lubricating oil enters the oil unloading groove 42, it can be thrown from the side with a deeper groove depth to the side with a shallower groove depth, which facilitates the discharge of the high-temperature lubricating oil.

[0053] In an optional embodiment, the depth of the oil unloading groove 42 gradually increases from the inner periphery of the bearing body 10 toward the outer periphery of the bearing body 10 along the radial direction of the bearing body 10, which further enables the oil unloading groove 42 to be quickly discharged from the inner wall of the bearing body 10 to the outer wall of the bearing body 10, thereby accelerating the discharge of high-temperature lubricating oil in the oil unloading groove 42.

[0054] This embodiment also provides another gearbox, which includes a support shaft and a sliding bearing structure as described in any of the above embodiments. The sliding bearing structure is disposed on the outer periphery of the support shaft to support it. By using this sliding bearing structure, the lubrication effect, load-bearing capacity, and service life of the sliding bearing structure are improved, thereby enhancing the reliability of the gearbox.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A sliding bearing structure, characterized in that, include: The bearing body (10) has multiple oil inlet channels (11) spaced apart on its outer periphery. Multiple circumferentially arranged bearing bushes (20) are disposed on the inner wall of the bearing body (10). Each bearing bush (20) has an oil bladder (30) at one end along its own circumference and an oil discharge structure (40) at the other end. Adjacent oil bladders (30) and oil discharge structures (40) are separated. The oil bladders (30) and the oil inlet channels (11) are connected in a one-to-one manner to introduce lubricating oil into the inner circumference of the bearing bush (20). The oil discharge structure (40) is used to discharge the lubricating oil after the inner circumference of the bearing bush (20) has been lubricated. The oil unloading structure (40) includes: Oil distribution groove (41) is opened on the inner circumferential surface of the bearing shell (20). The two ends of the oil distribution groove (41) pass through the bearing shell (20) along the axial direction of the bearing body (10). The oil distribution groove (41) is used to collect the high-temperature lubricating oil after the inner circumferential lubrication of the bearing shell (20) is completed. Oil unloading groove (42); opened at both ends of the bearing body (10) along its own axial direction, the oil unloading groove (42) is connected to the oil distribution groove (41), and the oil unloading groove (42) is used to discharge the high temperature lubricating oil in the oil distribution groove (41); The bottom and / or at least one wall of the unloading tank (42) are inclined to facilitate oil drainage.

2. The sliding bearing structure according to claim 1, characterized in that, The opening size of the oil unloading groove (42) gradually increases from the inner periphery of the bearing body (10) toward the outer periphery of the bearing body (10) along the radial direction of the bearing body (10).

3. The sliding bearing structure according to claim 1, characterized in that, The depth of the unloading groove (42) gradually decreases along the circumference of the bearing body (10) from one side near the oil distribution groove (41) toward the other side.

4. The sliding bearing structure according to any one of claims 1-3, characterized in that, The depth of the unloading groove (42) gradually increases from the inner periphery of the bearing body (10) toward the outer periphery of the bearing body (10) along the radial direction of the bearing body (10).

5. The sliding bearing structure according to claim 1, characterized in that, The oil bladder (30) is provided with baffles (32) on the side facing the oil unloading structure (40) and on both sides of the oil bladder (30) along the axial direction of the bearing body (10) to separate adjacent oil bladders (30) and oil unloading structures (40).

6. The sliding bearing structure according to claim 5, characterized in that, The oil bladder (30) has an arc-shaped portion (33) on the side near the bearing (20) for introducing lubricating oil into the bearing (20).

7. The sliding bearing structure according to claim 6, characterized in that, The thickness of the bearing bush (20) gradually increases from the oil bladder (30) toward the oil unloading structure (40) so that the inner circumferential surface of the bearing bush (20) forms an oil guide portion (34).

8. A gearbox, characterized in that, It includes a support shaft and a sliding bearing structure as described in any one of claims 1-7, wherein the sliding bearing structure is disposed on the outer periphery of the support shaft.

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