Pressing lubrication assembly and pressing bearing

Abstract

The utility model relates to the technical field of bearings, and provides a pressure dynamic lubrication assembly and a pressure dynamic bearing. The pressure dynamic lubrication assembly comprises a rotating shaft, a bearing body, a spiral oil guide groove and an oil return way; one end of the rotating shaft forms a mounting part; the bearing body comprises an inner ring body and an outer ring shell and is arranged on the periphery of one end of the rotating shaft in a sleeving mode through the inner ring body. The spiral oil guide groove is formed in the peripheral wall of the mounting part; the oil return way is arranged between the inner ring body and the outer ring shell, and the two ends of the oil return way communicate with the two ends of the spiral oil guide groove correspondingly. Lubricating oil can circularly flow along the spiral oil guide groove and the oil return way. The pressure dynamic bearing comprises a bearing body, the bearing body comprises an inner ring body and an outer ring shell; a spiral oil guide groove is formed in the inner circumferential wall of the inner ring body, and an oil return way is arranged between the inner ring body and the outer ring shell. The oil return way is communicated with the two ends of the spiral oil guide groove respectively. And the two can enable the lubricating oil to efficiently and circularly flow in the spiral oil guide groove and the oil return path, so that the beneficial effect of fully and circularly lubricating the rotating shaft and the bearing body is realized.

Description

Technical Field

[0001] The present disclosure relates to the technical field of bearings, and in particular to a pressure-dynamic lubrication assembly and a pressure-dynamic bearing. Background Art

[0002] Fluid dynamic pressure bearings are oil guide grooves machined in the inner surface of the bearing body or the outer surface of the shaft. When the lubricating fluid flows between the shaft and the bearing body, it can form concentrated pressure. The support force of the oil film prevents the shaft from contacting the shaft hole when rotating. Therefore, it can avoid wear caused by collision between the shaft and the bearing body, thereby reducing noise and vibration. This has become a common bearing technology for information products today. For related prior art, please refer to Chinese patents CN105298898B and CN116888373A.

[0003] However, in this type of hydrodynamic bearing in the prior art, the oil guide groove is generally designed to be a single “>” shape. During rotation (rotating shaft), the “>”-shaped oil guide groove can guide the oil located near the upper part of the bearing and the oil located near the lower part of the bearing to the middle position of the bearing along the axis of the bearing, and then expand to form an oil film after concentrated pressure is formed. In this type of structural hydrodynamic bearing, due to the “>”-shaped structure of the oil guide groove, the oil cannot form an effective circulation motion in the oil path formed between the bearing and the rotating shaft, or in other words, it is not conducive to the circulation motion of the oil in the circulating oil path, especially when the amount of oil in the bearing system is reduced, thereby generating undesirable noise or vibration.

[0004] Therefore, there is an urgent need for a new type of hydrodynamic bearing lubrication method in the market to solve the problems in the prior art that the lubrication oil circuit of the hydrodynamic bearing lubrication structure cannot form an effective circulation and that adverse noise or vibration is easily generated when the oil volume is small. Utility Model Content

[0005] The disclosed embodiments provide a dynamic lubrication assembly and a dynamic bearing, in order to solve the problems in the prior art of the dynamic pressure bearing lubrication structure that the lubricating oil circuit cannot form an effective circulation and that bad noise or vibration is easily generated when the oil volume is small.

[0006] The pressure-driven lubrication assembly provided in the embodiment of the present disclosure includes a rotating shaft, a bearing body, a spiral oil guide groove and an oil return path;

[0007] One end of the rotating shaft forms a mounting portion;

[0008] The bearing body comprises an inner ring body and an outer ring shell, and is sleeved on the outer periphery of one end of the rotating shaft through the inner ring body;

[0009] The spiral oil guide groove is provided on the outer peripheral wall of the mounting portion;

[0010] The oil return path is arranged between the inner ring body and the outer ring shell, and the two ends thereof are respectively connected to the two ends of the spiral oil guide groove;

[0011] When the rotating shaft rotates relative to the inner ring body, the lubricating oil can circulate along the spiral oil guide groove and the oil return path.

[0012] In one possible implementation manner, a concave annular oil sealing groove is provided in the peripheral surface of the mounting portion;

[0013] Furthermore, the spiral oil guide groove and the oil return path are respectively communicated with the annular oil sealing groove.

[0014] In one possible implementation manner, the annular oil sealing groove is respectively disposed on the upper and lower sides of the spiral oil guiding groove, and is respectively conductively connected to both ends of the spiral oil guiding groove.

[0015] In one embodiment, the inner bottom wall of the outer ring shell is further provided with a concave oil storage recess;

[0016] One end of the mounting portion can be rotatably abutted against the oil storage recess, and the annular oil sealing groove is at least partially located in the oil storage recess.

[0017] In one possible implementation manner, the abutting end of the mounting portion and the oil storage recess is configured as an arc spherical abutment joint;

[0018] A contact pad is also provided between the arc spherical contact joint and the oil storage recess.

[0019] In one embodiment, the inner bottom wall of the outer ring shell and the oil storage recess form a stepped platform;

[0020] A support pad for supporting the inner ring body is provided on the surface of the stepped platform;

[0021] An oil return branch is provided between the support pad and the inner ring body for connecting the oil return path with the annular oil sealing groove.

[0022] In one possible implementation, the pressure-driven lubrication assembly further includes an end cover;

[0023] The end cover is used to press the inner ring body cover to the outer ring shell;

[0024] An oil return sub-path for connecting the oil return path with the annular oil sealing groove is provided between the end cover and the inner ring body.

[0025] In one possible implementation manner, the spiral oil guide groove is configured as a spiral groove opened on the outer peripheral wall of the mounting portion.

[0026] In one embodiment, the spiral groove has one or more spiral grooves;

[0027] When a plurality of the spiral grooves are provided, the plurality of spiral grooves spiral in the same direction.

[0028] In addition, the embodiment of the present disclosure also provides a pressure dynamic bearing, which includes a bearing body;

[0029] The bearing body comprises an inner ring body and an outer ring shell;

[0030] The inner peripheral wall of the inner ring body is provided with a spiral oil guide groove, and an oil return path is provided between the inner ring body and the outer ring shell;

[0031] The oil return path is connected to both ends of the spiral oil guide groove respectively;

[0032] When the bearing body rotates, the lubricating oil can circulate along the spiral oil guide groove and the oil return path.

[0033] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0034] The pressure-driven lubrication assembly provided in the disclosed embodiment provides a spiral oil guide groove and an oil return path between the rotating shaft and the inner ring body, and relies on the relative rotation of the rotating shaft and the inner ring body to act as the "pumping power" of the lubricating oil, so that the lubricating oil can fully circulate and lubricate the rotating shaft and the bearing body, and the spiral oil guide groove is provided on the outer peripheral wall of the rotating shaft mounting portion, which does not affect the structural strength of the inner ring body in the bearing body, and can effectively ensure the service life of the bearing body, and the lubricating oil can circulate efficiently in the spiral oil guide groove and the oil return path, ensuring that the lubricating oil will not flow out of the pressure-driven lubrication assembly, thereby achieving full circulation lubrication of the rotating shaft and the bearing body, and even lubrication can be achieved evenly evenly evenly evenly evenly evenly evenly, ...

[0035] In addition, the compression bearing provided in the embodiment of the present disclosure has a spiral oil guide groove on the inner circumferential wall of the inner ring body, so that a spiral oil guide groove can also be formed between the inner ring body and the outer circumferential surface of the rotating shaft, and an oil return path is set between the inner ring body and the outer ring shell, and the oil return path is connected to both ends of the spiral oil guide groove, thereby forming a circulating lubricating oil path, thereby achieving the beneficial effect of fully circulating lubrication of the compression bearing.

[0036] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:

[0038] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0039] Figure 1 A vertical cross-sectional view of a press-lubrication assembly provided by an embodiment of the present disclosure is shown;

[0040] Figure 2 A three-dimensional half-section view of a press-lubrication assembly provided by an embodiment of the present disclosure is shown.

[0041] Explanation of the numbers in the figure: 1. rotating shaft; 11. annular oil sealing groove; 2. bearing body; 21. inner ring body; 22. outer ring shell; 221. oil storage recess; 222. abutment pad; 223. support pad; 3. spiral oil guide groove; 4. oil return circuit; 5. end cover. DETAILED DESCRIPTION

[0042] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0043] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0044] Combination Figure 1 and Figure 2 As shown, the embodiment of the present disclosure provides a pressure-dynamic lubrication assembly, which includes a rotating shaft 1, a bearing body 2, a spiral oil guide groove 3 and an oil return circuit 4; a mounting portion is formed at one end of the rotating shaft 1; the bearing body 2 includes an inner ring body 21 and an outer ring shell 22, and is sleeved on the outer periphery of one end of the rotating shaft 1 through the inner ring body 21; the spiral oil guide groove 3 is opened on the outer peripheral wall of the mounting portion; the oil return circuit 4 is arranged between the inner ring body 21 and the outer ring shell 22, and the two ends are respectively connected to the two ends of the spiral oil guide groove 3; wherein, when the rotating shaft 1 rotates relative to the inner ring body 21, the lubricating oil can circulate along the spiral oil guide groove 3 and the oil return circuit 4.

[0045] When the pressure-driven lubrication assembly is in use, when the shaft 1 rotates relatively in the inner ring body 21 of the bearing body 2, the spiral oil guide groove 3 at the outer peripheral wall of the shaft 1 can collect and guide the lubricating oil along its own spiral groove body through the rotation effect, so that the lubricating oil can generate a spiral flow from top to bottom along the spiral oil guide groove 3; and an oil return path 4 which is respectively connected to the two ends of the spiral oil guide groove 3 is also provided between the inner ring body 21 and the outer ring shell 22 of the bearing body 2, so that the oil return path 4 can make the lubricating oil at the lower end of the spiral oil guide groove 3 flow back to the upper end of the spiral oil guide groove 3, so that the lubricating oil can circulate efficiently in the spiral oil guide groove 3 and the oil return path 4, and it is ensured that the lubricating oil will not flow out of the pressure-driven lubrication assembly, thereby realizing sufficient circulation lubrication of the shaft 1 and the bearing body 2, and evenly lubricating the lubricating oil even if the amount of lubricating oil is relatively small, avoiding the problem of bad noise or vibration.

[0046] To summarize, the press-lubricating assembly provided by the embodiment of the present disclosure, by setting a spiral oil guide groove 3 and an oil return path 4 between the rotating shaft 1 and the inner ring body 21, and relying on the relative rotation of the rotating shaft 1 and the inner ring body 21 to act as the "pumping power" of the lubricating oil, enables the lubricating oil to fully circulate and lubricate the rotating shaft 1 and the bearing body 2, and the spiral oil guide groove 3 is set on the outer peripheral wall of the mounting part of the rotating shaft 1, which does not affect the structural strength of the inner ring body 21 in the bearing body 2, and can effectively ensure the service life of the bearing body 2.

[0047] In one possible implementation manner, a concave annular oil sealing groove 11 is opened in the circumferential surface of the mounting portion; and the spiral oil guide groove 3 and the oil return path 4 are respectively connected to the annular oil sealing groove 11 .

[0048] Specific, combined Figure 1 and Figure 2 To further explain in detail, a recessed annular oil sealing groove 11 is opened on the circumferential surface of the mounting portion, and the spiral oil guide groove 3 and the oil return circuit 4 are respectively connected to the annular oil sealing groove 11. In this way, the annular oil sealing groove 11 can, on the one hand, serve as a "buffer storage unit" for the lubricating oil, ensuring that a sufficient amount of lubricating oil circulates between the spiral oil guide groove 3 and the oil return circuit 4 to avoid the problem of lubricating oil interruption. On the other hand, the annular oil sealing groove 11 also facilitates the storage of more lubricating oil between the rotating shaft 1 and the bearing body 2, thereby increasing the maintenance and addition cycle of the lubricating oil of the compressed lubrication assembly when in use.

[0049] The annular oil sealing groove 11 can be specifically configured as an annular recessed groove having a U-shaped, dovetail-shaped or other cross-sectional shape, and the groove wall on one side is connected to one end of the spiral oil guide groove 3, and the groove opening is connected to the oil return path 4, so as to realize the function of temporarily storing the circulating lubricating oil.

[0050] In one embodiment, the annular oil sealing groove 11 is respectively disposed on the upper and lower sides of the spiral oil guide groove 3 , and is respectively conductively connected to the two ends of the spiral oil guide groove 3 .

[0051] Specific, combined Figure 1 and Figure 2 To further explain in detail, the annular oil sealing groove 11 is specifically arranged to be respectively arranged on the upper and lower sides of the spiral oil guide groove 3, and are respectively conductively connected to the two ends of the spiral oil guide groove 3, so that the two spiral oil guide grooves 3 can be used as the "buffer storage part" of the lubricating oil at the same time, further increasing the amount of lubricating oil between the spiral oil guide groove 3 and the oil return circuit 4, and when the rotating shaft 1 rotates forward or reversely relative to the bearing body 2, the annular oil sealing grooves 11 on the upper and lower sides of the spiral oil guide groove 3 can correspondingly receive the lubricating oil guided by the spiral oil guide groove 3.

[0052] The specific arrangement of the annular oil sealing groove 11 has a simple structure and can fully support the forward and reverse rotation of the rotating shaft 1.

[0053] In one embodiment, the inner bottom wall of the outer ring shell 22 is further provided with a recessed oil storage recess 221 ; one end of the mounting portion can be rotatably abutted against the oil storage recess 221 , and the annular oil sealing groove 11 is at least partially located in the oil storage recess 221 .

[0054] Specific, combined Figure 1 and Figure 2 To further explain in detail, a recessed oil storage recess 221 is also provided on the inner bottom wall of the outer ring shell 22, so that the oil storage recess 221 can be used to store a large amount of lubricating oil, and one end of the mounting portion can be rotatably abutted against the oil storage recess 221, and the annular oil sealing groove 11 is at least partially located in the oil storage recess 221, so that the rotation of the rotating shaft 1 can improve the fluidity of the lubricating oil in the oil storage recess 221, thereby facilitating the lubricating oil in the oil storage recess 221 to be replenished to the annular oil sealing groove 11 in time.

[0055] The specific configuration of the oil storage recess 221 has the beneficial effects of being simple in structure, being able to store a large amount of lubricating oil, and being able to replenish the annular oil sealing groove 11 in a timely manner.

[0056] In one embodiment, the abutting end between the mounting portion and the oil storage recess 221 is configured as an arc spherical abutment joint; and an abutment pad 222 is further disposed between the arc spherical abutment joint and the oil storage recess 221 .

[0057] Specific, combined Figure 1 and Figure 2To further explain in detail, the abutting end of the mounting portion in the rotating shaft 1 and the oil storage recess 221 is specifically configured as an arc spherical abutment joint, which can reduce the friction resistance encountered by the rotating shaft 1 during rotation; and an abutment pad 222 is also provided between the arc spherical abutment joint and the oil storage recess 221. The abutment pad 222 can, on the one hand, avoid direct wear of the arc spherical abutment joint on the oil storage recess 221, and on the other hand, can also buffer the axial impact load from the rotating shaft 1.

[0058] Of course, in order to improve the positioning and installation accuracy of the arc spherical abutment joint, a concave arc spherical groove may be correspondingly opened in the central portion of the abutment pad 222 for positioning and installing the arc spherical abutment joint therein.

[0059] In one embodiment, the inner bottom wall of the outer ring shell 22 and the oil storage recess 221 form a step; a support pad 223 for supporting the inner ring body 21 is provided on the surface of the step; and an oil return branch is provided between the support pad 223 and the inner ring body 21 for connecting the oil return path 4 with the annular oil sealing groove 11.

[0060] Specific, combined Figure 1 and Figure 2 Further detailed description, a stepped platform formed with the oil storage recess 221 is provided on the inner bottom wall of the outer ring shell 22, and a support pad 223 for supporting the inner ring body 21 is provided on the surface of the stepped platform. On the one hand, the support pad 223 can be used to support the inner ring body 21 and improve the installation stability of the inner ring body 21; on the other hand, the support pad 223 can form an oil return branch with the inner ring body 21, and one end of the oil return path 4 is connected to an annular oil sealing groove 11 through the oil return branch.

[0061] Of course, in order to ensure the diversion effect of the oil return branch, a diversion groove can be correspondingly opened on the side of the support pad 223 facing the inner ring body 21, so that a more spacious oil return branch is formed between the support pad 223 and the inner ring body 21.

[0062] In one embodiment, the pressure-driven lubrication assembly also includes an end cover 5; the end cover 5 is used to press the inner ring body 21 to the outer ring shell 22; there is an oil return sub-path between the end cover 5 and the inner ring body 21 for connecting the oil return path 4 with the annular oil sealing groove 11.

[0063] Specific, combined Figure 1 and Figure 2 Further detailed description, the pressure-driven lubrication assembly is limited in position on the outer ring shell 22 by the end cover 5, so as to realize the limited installation and fixation of the inner ring body 21, and an oil return sub-path is formed between the end cover 5 and the inner ring body 21, and the other end of the oil return path 4 is connected to another annular oil sealing groove 11 through the oil return sub-path.

[0064] Similarly, in order to ensure the diversion effect of the oil return sub-path, a diversion groove can be opened corresponding to the side of the end cover 5 facing the inner ring body 21, so that a more spacious oil return sub-path is formed between the end cover 5 and the inner ring body 21.

[0065] In one possible implementation manner, the spiral oil guide groove 3 is configured as a spiral groove opened on the outer peripheral wall of the mounting portion.

[0066] Specific, combined Figure 1 and Figure 2 To further explain in detail, the spiral oil guide groove 3 is specifically configured as a spiral groove opened on the outer peripheral wall of the mounting part of the rotating shaft 1, which can be achieved by turning the outer peripheral wall of the rotating shaft 1 through a precision CNC lathe, and the depression depth, width and pitch of the spiral groove can be adjusted and set according to the size of the rotating shaft 1.

[0067] In one embodiment, one or more spiral grooves are provided; when multiple spiral grooves are provided, the multiple spiral grooves spiral in the same direction.

[0068] When multiple spiral grooves are provided on the outer circumference of the rotating shaft 1, the multiple spiral grooves are arranged in the same direction and spaced apart from each other, so that the spiral grooves can evenly form oil guide grooves around the outer circumference of the rotating shaft 1, thereby achieving the beneficial effect of fully lubricating the rotating shaft 1 and the bearing body 2.

[0069] In addition, the disclosed embodiment also provides a compression bearing, which includes a bearing body 2; the bearing body 2 includes an inner ring body 21 and an outer ring shell 22; a spiral oil guide groove 3 is opened on the inner circumferential wall of the inner ring body 21, and an oil return path 4 is arranged between the inner ring body 21 and the outer ring shell 22; the oil return path 4 is respectively connected to the two ends of the spiral oil guide groove 3; when the bearing body 2 rotates, the lubricating oil can circulate along the spiral oil guide groove 3 and the oil return path 4.

[0070] The pressure-dynamic bearing is provided with a spiral oil guide groove 3 on the inner circumferential wall of the inner ring body 21. When the pressure-dynamic bearing is assembled with the rotating shaft, a spiral oil guide groove can be formed between the inner ring body 21 and the outer circumferential surface of the rotating shaft. An oil return path 4 is provided between the inner ring body 21 of the bearing body 2 and the outer ring shell 22. The oil return path 4 is connected to both ends of the spiral oil guide groove 3, thereby forming a circulating lubricating oil path, achieving the beneficial effect of sufficient circulating lubrication of the pressure-dynamic bearing.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0072] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A pressure-driven lubrication assembly, characterized in that: include: A rotating shaft (1) having a mounting portion formed at one end; The bearing body (2) comprises an inner ring body (21) and an outer ring shell (22), and is sleeved on the outer periphery of one end of the rotating shaft (1) through the inner ring body (21); A spiral oil guide groove (3) is provided on the outer peripheral wall of the mounting portion; An oil return path (4) is arranged between the inner ring body (21) and the outer ring shell (22), and two ends of the oil return path are respectively connected to two ends of the spiral oil guide groove (3); When the rotating shaft (1) rotates relative to the inner ring body (21), the lubricating oil can circulate along the spiral oil guide groove (3) and the oil return path (4).

2. The pressure-driven lubrication assembly according to claim 1, characterized in that: A concave annular oil sealing groove (11) is provided in the peripheral surface of the mounting portion; Furthermore, the spiral oil guide groove (3) and the oil return path (4) are respectively connected to the annular oil sealing groove (11).

3. The pressure-driven lubrication assembly according to claim 2, characterized in that: The annular oil sealing groove (11) is respectively arranged on the upper and lower sides of the spiral oil guide groove (3), and is respectively conductively connected to the two ends of the spiral oil guide groove (3).

4. The pressure-driven lubrication assembly according to claim 2, characterized in that: The inner bottom wall of the outer ring shell (22) is also provided with a concave oil storage recess (221); One end of the mounting portion can be rotatably abutted against the oil storage recess (221), and the annular oil sealing groove (11) is at least partially located in the oil storage recess (221).

5. The pressure-driven lubrication assembly according to claim 4, characterized in that: The abutting ends of the mounting portion and the oil storage recess (221) are configured as arc spherical abutting joints; A contact pad (222) is also provided between the arc spherical contact joint and the oil storage recess (221).

6. The pressure-driven lubrication assembly according to claim 4, characterized in that: The inner bottom wall of the outer ring shell (22) and the oil storage recess (221) form a stepped platform; A support pad (223) for supporting the inner ring body (21) is provided on the surface of the stepped platform; An oil return branch is provided between the support pad (223) and the inner ring body (21) for connecting the oil return path (4) to the annular oil sealing groove (11).

7. The pressure-driven lubrication assembly according to claim 2, characterized in that: The pressure-driven lubrication assembly also includes an end cover (5); The end cover (5) is used to press the inner ring body (21) to be located on the outer ring shell (22); An oil return sub-path for connecting the oil return path (4) to the annular oil sealing groove (11) is provided between the end cover (5) and the inner ring body (21).

8. The pressure-driven lubrication assembly according to any one of claims 1 to 7, characterized in that: The spiral oil guide groove (3) is configured as a spiral groove opened on the outer peripheral wall of the mounting portion.

9. The pressure-driven lubrication assembly according to claim 8, characterized in that: The spiral groove is provided with one or more; When a plurality of the spiral grooves are provided, the plurality of spiral grooves spiral in the same direction.

10. A dynamic bearing, characterized in that: comprising a bearing body (2); The bearing body (2) comprises an inner ring body (21) and an outer ring shell (22); The inner circumferential wall of the inner ring body (21) is provided with a spiral oil guide groove (3), and an oil return path (4) is provided between the inner ring body (21) and the outer ring shell (22); The oil return path (4) is respectively connected to two ends of the spiral oil guide groove (3); When the bearing body (2) rotates, the lubricating oil can circulate along the spiral oil guide groove (3) and the oil return path (4).

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