Lubricating system for turntable bearing

Abstract

The utility model relates to a lubricating system for a turntable bearing in the technical field of bearing lubrication, which comprises a fixed ring and a rotating ring, and one side of the fixed ring deviating from the rotating ring is hermetically and rotatably connected with a rotating lubricating sleeve; a radial through hole and a radial blind hole are formed in the fixing ring at intervals in the axial direction of the fixing ring, and an opening of the radial blind hole faces the rotary lubricating sleeve; one end face of the fixing ring is further provided with an oil supplementing channel communicated with the radial blind hole. The rotary lubricating sleeve is provided with a sliding hole which is provided with an opening facing the fixing ring and can be communicated with the radial blind hole, and the sliding hole is sequentially provided with an elastic compression piece and a piston from inside to outside; the side face, corresponding to the rotary lubricating sleeve, of the fixing ring is further provided with an axial oil groove, one end of the axial oil groove communicates with the radial penetrating hole, and the other end extends to the axial position of the radial blind hole. Through relative rotation of the rotary lubricating sleeve and the fixing ring, the intermittent communication state of the sliding hole and the radial blind hole or the axial oil groove is controlled, and oil supply according to needs is achieved.

Description

Technical Field

[0001] This utility model relates to the field of bearing lubrication technology, and in particular to a lubrication system for turntable bearings. Background Technology

[0002] In large rotating machinery, slewing bearings are core load-bearing components, and their lubrication reliability directly determines the service life of the equipment. Especially in applications such as wind power yaw systems and port crane slewing bearings, slewing bearings commonly employ a double-end contact sealing structure to prevent contaminants from entering the raceway. Currently, the industry mainstream uses a quantitative oil injection method (fixed-cycle oil injection). This method leads to excessive grease accumulation (over 30%) at low speeds / shutdowns, causing a surge in sealing cavity pressure and accelerating seal lip failure. Static oil injection cannot match the dynamic operating conditions of the bearing; at high speeds, the oil film thickness is insufficient (<5μm), while at low speeds, the oil film is excessively thick (>25μm), increasing the risk of raceway pitting corrosion by three times.

[0003] To address this, we designed a lubrication system for slewing bearings. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model discloses a lubrication system for turntable bearings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lubrication system for a turntable bearing includes a fixed ring and a rotating ring, wherein a rotating lubrication sleeve is rotatably and sealed to the side of the fixed ring opposite to the rotating ring.

[0007] The retaining ring is provided with radial through holes and radial blind holes spaced apart along its axial direction, and the opening of the radial blind holes faces the rotating lubrication sleeve; one end face of the retaining ring is also provided with an oil replenishment channel communicating with the radial blind holes;

[0008] The rotary lubrication sleeve has a sliding hole with an opening facing the fixed ring and capable of communicating with a radial blind hole. The sliding hole is provided with an elastic compression element and a piston from the inside to the outside.

[0009] The fixed ring is also provided with an axial oil groove on the side corresponding to the rotating lubrication sleeve. One end of the axial oil groove is connected to the radial through hole, and the other end extends to the axial position of the radial blind hole.

[0010] Furthermore, the outer end of the oil replenishment channel is provided with an oil injection connector for connecting to an oil injection device.

[0011] Furthermore, an inner retaining spring is provided at the opening of the sliding hole to limit the piston stroke.

[0012] Furthermore, the fixed ring is provided with external retaining rings at the positions corresponding to both ends of the rotating lubricating sleeve to limit the axial position of the rotating lubricating sleeve.

[0013] Furthermore, the rotating lubrication sleeve is made of nylon material.

[0014] Furthermore, the radial perforation corresponding to the opening of the rotating ring is provided with a spray nozzle for spraying into the raceway.

[0015] Furthermore, the two ends between the rotating lubricating sleeve and the fixed ring are provided with seals.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. By rotating the lubrication sleeve relative to the fixed ring, the intermittent connection between the sliding hole and the radial blind hole or axial oil groove is controlled, achieving on-demand oil supply. Simultaneously, at high speeds, the number of oil supply cycles per unit time increases, improving the oil film thickness and preventing insufficient oil film thickness; at low speeds, the number of oil supply cycles per unit time decreases, preventing excessively thick oil film.

[0018] 2. The internal retaining ring not only prevents the elastic compression component from separating from the piston during the assembly of the rotating lubrication sleeve, but also prevents the piston from contacting and rubbing against the outer ring of the bearing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 for Figure 1 Enlarged view of part I in the image;

[0021] Figure 3 for Figure 1 Enlarged view of part II in the image;

[0022] Figure 4 This is a structural schematic diagram of another state of the present invention;

[0023] Figure 5 for Figure 4 A magnified view of part III in the image.

[0024] In the diagram: 1. Fixed ring; 11. Radial perforation; 12. Radial blind hole; 13. Oil replenishment channel; 14. Axial oil groove; 2. Rotating ring; 3. Rotary lubrication sleeve; 31. Sliding hole; 4. Elastic compression component; 5. Piston; 6. Oil injection connector; 7. Inner snap ring; 8. Outer snap ring; 9. Injection nozzle. Detailed Implementation

[0025] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0026] Example 1, in conjunction with Appendix Figure 1-5 A lubrication system for a turntable bearing includes a fixed ring 1 and a rotating ring 2. For ease of understanding, the following explanation will use the outer ring of the bearing as the fixed ring 1 and the inner ring of the bearing as the rotating ring 2 as an example.

[0027] It should be noted that the bearing outer ring and bearing inner ring also have existing structures such as raceways, balls, cages and oil seals (not shown in the figure), which will not be described again here.

[0028] A rotating lubrication sleeve 3 is rotatably connected to the outer side of the bearing outer ring; the rotating lubrication sleeve 3 is made of nylon material as needed; preferably, it is made of wear-resistant nylon material.

[0029] Furthermore, seals (not shown in the figure) are provided at both ends between the rotating lubrication sleeve 3 and the fixed ring 1. Specifically, the seals can be designed using the oil seal structure principle between the outer ring and inner ring of the bearing, which will not be elaborated here.

[0030] As needed, the fixed ring 1 is provided with external retaining springs 8 at both ends of the rotating lubrication sleeve 3 to limit the axial position of the rotating lubrication sleeve 3.

[0031] The bearing outer ring is provided with radial through holes 11 and radial blind holes 12 at intervals along its axial direction, and the opening of the radial blind holes 12 faces outward; one end face of the bearing outer ring is also provided with an oil replenishment channel 13 that communicates with the radial blind holes 12; that is, the radial blind holes 12 and the oil replenishment channel 13 are in an L-shaped structure.

[0032] As needed, the outer end of the oil replenishment channel 13 is provided with an oil filling connector 6 for connecting to an oil filling device.

[0033] As needed, the radial perforation 11 is provided with a spray nozzle 9 corresponding to the opening of the rotating ring 2 for spraying into the raceway.

[0034] The rotating lubrication sleeve 3 has a sliding hole 31 that opens towards the fixed ring 1 and can communicate with the radial blind hole 12; that is, when the rotating lubrication sleeve 3 rotates to a specific angle, the sliding hole 31 and the radial blind hole 12 are in a communicating state. Preferably, when the communication cross section between the two is at its maximum, the two are in a coaxial state.

[0035] The sliding hole 31 is provided with an elastic compression element 4 and a piston 5 from the inside to the outside; the elastic compression element 4 is a spring if necessary. The piston 5 is made of nylon material if necessary; preferably, it is made of wear-resistant nylon material.

[0036] The fixed ring 1 is also provided with an axial oil groove 14 on the side corresponding to the rotating lubrication sleeve 3. One end of the axial oil groove 14 is connected to the radial through hole 11, and the other end extends to the axial position of the radial blind hole 12. That is, when the rotating lubrication sleeve 3 rotates to another specific angle, the sliding hole 31 and the axial oil groove 14 are in a connected state.

[0037] When injecting lubricant, the lubricant enters the oil replenishment channel 13. When the rotating lubrication sleeve 3 rotates to a specific angle (the sliding hole 31 is connected to the radial blind hole 12), the lubricant squeezes the piston 5 into the sliding hole 31. As the rotating lubrication sleeve 3 rotates, when the rotating lubrication sleeve 3 rotates to another specific angle (the sliding hole 31 is connected to the axial oil groove 14), the elastic compression member 4 squeezes the piston 5. The piston 5 pushes the lubricant in the sliding hole 31 to the axial oil groove 14, and then flows through the radial through hole 11 to the space between the inner ring and the outer ring of the bearing, thus completing the function of injecting lubricant into the raceway.

[0038] Example 2, in conjunction with Appendix Figure 3 and 5 A lubrication system for a turntable bearing differs from Embodiment 1 in that the structure of the sliding hole 31 is optimized, which not only prevents the elastic compression member 4 and the piston 5 from separating when the rotating lubrication sleeve 3 is assembled, but also prevents the piston 5 from contacting and rubbing against the outer ring of the bearing.

[0039] Specifically, an inner retaining spring 7 is provided at the opening of the sliding hole 31 to limit the stroke of the piston 5.

[0040] It should be noted that the fixed ring 1 can also serve as the inner ring of the bearing, and the rotating ring 2 as the outer ring of the bearing. In this case, the rotating lubricating sleeve 3 is rotatably connected to the inner side of the inner ring of the bearing. The structural principle is the same as that of the bearing with the outer ring being the fixed ring 1 and the inner ring being the rotating ring 2, and will not be described in detail here.

[0041] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A lubrication system for a turntable bearing, comprising a fixed ring (1) and a rotating ring (2), characterized in that: The fixed ring (1) is rotatably connected to the rotating lubrication sleeve (3) on the side away from the rotating ring (2). The fixing ring (1) is provided with radial through holes (11) and radial blind holes (12) spaced apart along its axial direction, and the opening of the radial blind holes (12) faces the rotating lubrication sleeve (3); one end face of the fixing ring (1) is also provided with an oil replenishment channel (13) communicating with the radial blind holes (12). The rotating lubrication sleeve (3) is provided with a sliding hole (31) with the opening facing the fixed ring (1) and able to communicate with the radial blind hole (12). The sliding hole (31) is provided with an elastic compression member (4) and a piston (5) from the inside to the outside. The fixed ring (1) is also provided with an axial oil groove (14) on the side of the rotating lubrication sleeve (3), and one end of the axial oil groove (14) is connected to the radial through hole (11), and the other end extends to the axial position of the radial blind hole (12).

2. The lubrication system for a slewing bearing according to claim 1, characterized in that: The outer end of the oil replenishment channel (13) is provided with an oil injection connector (6) for connecting to the oil injection equipment.

3. The lubrication system for a turntable bearing according to claim 1, characterized in that: An inner retaining ring (7) is provided at the opening of the sliding hole (31) to limit the stroke of the piston (5).

4. The lubrication system for a turntable bearing according to claim 1, characterized in that: The fixing ring (1) is provided with external retaining rings (8) at both ends of the rotating lubrication sleeve (3) to limit the axial position of the rotating lubrication sleeve (3).

5. A lubrication system for a turntable bearing according to claim 1, characterized in that: The rotating lubrication sleeve (3) is made of nylon material.

6. A lubrication system for a turntable bearing according to claim 1, characterized in that: The radial perforation (11) is provided with a spray nozzle (9) corresponding to the opening of the rotating ring (2) for spraying into the raceway.

7. A lubrication system for a turntable bearing according to claim 1, characterized in that: The two ends of the rotating lubrication sleeve (3) and the fixed ring (1) are provided with seals.

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