Long-life oil bearing

Abstract

The utility model discloses a long-life oil-retaining bearing which comprises a bearing main body, a shaft hole for a rotating shaft to pass through is arranged on the bearing main body, a contact section for contacting and supporting the rotating shaft is arranged at the middle section of the shaft hole, oil receiving backflow sections of which the hole diameters are gradually increased from inside to outside are respectively arranged at two ends of the shaft hole, and one end of each oil receiving backflow section with a small hole diameter is connected with the contact section.

Description

Technical Field

[0001] The utility model relates to an oil-containing bearing, in particular to an oil-containing bearing with a long service life. Background Art

[0002] An oil-impregnated bearing is a bearing that reduces friction by pre-immersing it in lubricating oil. For example, the sintered oil-impregnated bearing and its manufacturing method disclosed in Chinese utility model patent authorization number CN111566366B forms an oil film on its surface during use, thereby reducing the coefficient of friction. Currently, the most common failure mode of oil-impregnated bearings is lubrication failure. During operation, due to the high-speed rotation of the shaft, the lubricating oil pre-immersed in the oil-impregnated bearing to form the surface oil film is easily thrown outward from the end faces of the oil-impregnated bearing's shaft hole. Over time, the lubricating oil pre-immersed in the oil-impregnated bearing will be exhausted. Once the lubricating oil is exhausted, the oil-impregnated bearing loses its lubrication effect. Therefore, equipment maintenance personnel often need to frequently monitor the operation of the oil-impregnated bearing and replace it with a new bearing with sufficient oil content, making the maintenance process very cumbersome.

[0003] Therefore, how to overcome the above-mentioned defects has become an important issue to be solved urgently by those skilled in the art. Utility Model Content

[0004] The utility model overcomes the deficiencies of the above-mentioned technologies and provides an oil-containing bearing with a long service life.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A long-life oil-containing bearing includes a bearing body 1, wherein the bearing body 1 is provided with an axial hole 2 for a rotating shaft to pass through, a contact section 21 for contacting and supporting the rotating shaft is provided in the middle section of the axial hole 2, and both ends of the axial hole 2 are respectively provided with an oil receiving and returning section 22 with an aperture gradually increasing from the inside to the outside, and the end of the oil receiving and returning section 22 with a smaller aperture is connected to the contact section 21.

[0007] Preferably, the thickness of the bearing body 1 is D, the length of the oil return section 22 is L, and 3.5≤D:L≤4.5.

[0008] Preferably, the aperture of the outermost end of the oil receiving and reflux section 22 is Φ1, and the aperture of the contact section 21 is Φ2, where 1<Φ1:Φ2≤1.5.

[0009] Preferably, both ends of the shaft hole 2 transition to the outer wall surface of the bearing body 1 through an arc surface 11.

[0010] Preferably, both ends of the side wall surface of the bearing body 1 are respectively provided with a trimming section 12 whose diameter gradually decreases from the center of the bearing body 1 to the end surface of the bearing body 1, and the trimming section 12 and the oil return section 22 at the corresponding end are transitioned through an arc surface 11.

[0011] Preferably, the radius of the arc surface 11 is R, and R=0.1L.

[0012] Preferably, the oil content of the bearing body 1 when it is fully immersed in lubricating oil is greater than 18%.

[0013] Preferably, the oil return section 22 is an inclined surface, a curved surface or a stepped surface.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The shaft hole of the oil-containing bearing in this case includes a contact section and an oil receiving and returning section, wherein the contact section is mainly used to contact the rotating shaft and support the rotation of the rotating shaft, and the two ends of the contact section are respectively provided with an oil receiving and returning section, and the aperture of the oil receiving and returning section gradually increases from the inside of the shaft hole to the outside of the shaft hole. Therefore, when the rotating shaft rotates in the oil-containing bearing in this case, the lubricating oil that is thrown out is actually thrown out from the gap between the rotating shaft and the contact section. The thrown lubricating oil will splash onto the oil receiving and returning section. The lubricating oil that splashes upward onto the oil receiving and returning section can flow back into the contact section along the oil receiving and returning section or re-infiltrate into the bearing body, and some of the lubricating oil that splashes downward onto the oil receiving and returning section can also re-infiltrate into the bearing body. In this way, the loss of lubricating oil can be greatly reduced, thereby reducing the maintenance frequency and increasing the service life of the oil-containing bearing in this case. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the oil-containing bearing in this case.

[0017] Figure 2 It is a cross-sectional schematic diagram of the oil-containing bearing in this case.

[0018] Figure 3 This is a schematic diagram of the lubricating oil being thrown out when the oil-containing bearing in this case is working.

[0019] Figure 4 This is a schematic diagram of a conventional oil-containing bearing working with lubricating oil being thrown out. DETAILED DESCRIPTION

[0020] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0021] like Figures 1 to 3As shown, a long-life oil-containing bearing includes a bearing body 1, wherein the bearing body 1 is provided with an axial hole 2 for the rotating shaft to pass through, the middle section of the axial hole 2 is provided with a contact section 21 for contacting and supporting the rotating shaft, and both ends of the axial hole 2 are respectively provided with an oil receiving and returning section 22 with an aperture gradually increasing from the inside to the outside, and the end of the oil receiving and returning section 22 with a smaller aperture is connected to the contact section 21.

[0022] like Figure 4 As shown, if a conventional oil-containing bearing is used, when the shaft rotates, the lubricating oil will be thrown out from the gap between the shaft and the ends of the shaft hole, which will cause the loss of lubricating oil and accelerate the failure of the oil-containing bearing.

[0023] As described above, the shaft hole 2 of the oil-containing bearing in this embodiment includes a contact section 21 and an oil receiving and return section 22. The contact section 21 is mainly used to contact the rotating shaft and support the rotating shaft in rotation, while the oil receiving and return sections 22 are respectively provided at both ends of the contact section 21. The aperture of the oil receiving and return sections 22 gradually increases from the inside of the shaft hole to the outside of the shaft hole. Therefore, when the rotating shaft rotates in the oil-containing bearing in this embodiment, the lubricating oil that is thrown out is actually thrown out from the gap between the rotating shaft and the contact section 21. This thrown lubricating oil will splash onto the oil receiving and return sections 22. The lubricating oil that splashes upward onto the oil receiving and return sections 22 can flow back into the contact section 21 along the oil receiving and return sections 22 or re-infiltrate the bearing body 1. The lubricating oil that splashes downward onto the oil receiving and return sections 22 can also re-infiltrate the bearing body 1. In this way, the loss of lubricating oil can be greatly reduced, thereby reducing the maintenance frequency and increasing the service life of the oil-containing bearing in this embodiment.

[0024] like Figures 1 to 2 As shown, preferably, the thickness of the bearing body 1 is D, the length of the oil receiving and returning section 22 is L, 3.5≤D:L≤4.5, so that it can be ensured that the oil-containing bearing in this case has an oil receiving and returning section 22 of sufficient length for receiving the ejected lubricating oil, thereby improving the service life of the oil-containing bearing. At the same time, it can also ensure that there is a contact section 21 of sufficient length for supporting the rotating shaft.

[0025] like Figures 1 to 2 As shown, preferably, the aperture of the outermost end of the oil receiving and reflux section 22 is Φ1, and the aperture of the contact section 21 is Φ2, 1<Φ1:Φ2≤1.5. In this way, it can be ensured that the aperture increase of the oil receiving and reflux section 22 will not be too large, thereby ensuring that the thrown-out lubricating oil can fall more on the oil receiving and reflux section 22, avoiding the lubricating oil being directly thrown out of the oil-containing bearing due to excessive aperture increase and failing to achieve the effect of oil receiving and reflux.

[0026] Preferably, both ends of the shaft hole 2 and the outer wall of the bearing body 1 are transitioned through an arc surface 11. In this way, the contact mode between the oil-containing bearing and the end cover in this case can be changed from surface-to-surface contact to line-to-surface contact, thereby reducing the contact area, which can reduce wear and noise.

[0027] like Figures 1 to 2 As shown, preferably, both ends of the side wall surface of the bearing body 1 are respectively provided with a trimming section 12 whose diameter gradually decreases from the center of the bearing body 1 to the end surface of the bearing body 1, and the trimming section 12 and the oil return section 22 at the corresponding end are transitioned through an arc surface 11.

[0028] As described above, both ends of the side wall surface of the bearing body 1 in this case are respectively provided with a trimming section 12, and the trimming section 12 at the same end and the oil return section 22 are transitioned through an arc surface 11. In this way, the volume of the bearing body 1 can be reduced by setting the trimming section 12, thereby reducing the manufacturing cost. At the same time, connecting the oil return section 22 and the trimming section 12 through the arc surface 11 can change the original surface-to-surface contact between the oil-containing bearing and the end cover into line-to-surface contact, thereby reducing the contact area, thereby reducing wear and noise.

[0029] like Figures 1 to 2 As shown, preferably, the radius of the arc surface 11 is R, and R=0.1L. In this way, the length loss of the oil receiving return section 22 caused by excessive setting of the arc surface 11 can be effectively reduced.

[0030] Preferably, the oil content of the bearing body 1 when it is soaked in lubricating oil is greater than 18%, that is, the volume of the lubricating oil in the bearing body 1 ÷ the volume of the bearing body 1 × 100% is greater than 18%. In this way, under the effect of the oil reflux section 22, the oil-containing bearing can maintain the lubrication effect for a longer time without the need for frequent maintenance and adding of lubricating oil.

[0031] Preferably, the oil receiving and reflux section 22 is an inclined surface, an arc surface or a stepped surface, so that the lubricating oil can reflux more smoothly.

[0032] As mentioned above, this case protects a long-life oil-containing bearing, and all technical solutions that are the same or similar to those in this case should be deemed to fall within the scope of protection of this case.

Claims

1. A long-life oil-containing bearing, characterized in that The invention comprises a bearing body (1), wherein the bearing body (1) is provided with an axial hole (2) for a rotating shaft to pass through, a contact section (21) for contacting and supporting the rotating shaft is provided in the middle section of the axial hole (2), and both ends of the axial hole (2) are respectively provided with an oil receiving and returning section (22) with a gradually increasing aperture from the inside to the outside, and the end of the oil receiving and returning section (22) with a smaller aperture is connected to the contact section (21).

2. A long-life oil-containing bearing according to claim 1, characterized in that The thickness of the bearing body (1) is D, the length of the oil return section (22) is L, and 3.5≤D:L≤4.

5.

3. A long-life oil-containing bearing according to claim 1, characterized in that The aperture of the outermost end of the oil receiving and reflux section (22) is Φ1, and the aperture of the contact section (21) is Φ2, where 1<Φ1:Φ2≤1.

5.

4. A long-life oil-containing bearing according to claim 1, characterized in that Both ends of the shaft hole (2) and the outer wall surface of the bearing body (1) are transitioned through arc surfaces (11).

5. The long-life oil-containing bearing according to claim 2, characterized in that Both ends of the side wall surface of the bearing body (1) are respectively provided with a trimming section (12) whose diameter gradually decreases from the center of the bearing body (1) to the end surface of the bearing body (1), and a cambered surface (11) transitions between the trimming section (12) and the oil return section (22) at the corresponding end.

6. A long-life oil-containing bearing according to claim 5, characterized in that The radius of the arc surface (11) is R, and R=0.1L.

7. The long-life oil-containing bearing according to claim 1, characterized in that When the bearing body (1) is fully immersed in lubricating oil, the oil content is greater than 18%.

8. The long-life oil-containing bearing according to claim 1, characterized in that The oil receiving and reflux section (22) is an inclined surface, an arc surface or a step surface.

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