Long-life oil bearing

Abstract

The invention discloses a long-life oil-retaining bearing which comprises a bearing body, a shaft hole allowing a rotating shaft to penetrate through is formed in the bearing body, a contact section used for being in contact with and supporting the rotating shaft is arranged in the middle section of the shaft hole, oil receiving backflow sections with the hole diameters gradually increased from inside to outside are arranged at the two ends of the shaft hole respectively, and the ends, with the small hole diameters, of the oil receiving backflow sections are connected with the contact section.

Description

Technical Field

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

[0002] An oil-containing bearing is a bearing that reduces friction by pre-immersing it in lubricating oil, such as the sintered oil-containing bearing and its manufacturing method disclosed in the Chinese invention patent with authorization announcement number CN111566366B. When in use, the oil-containing bearing will form an oil film on the surface, thereby reducing the friction coefficient through the oil film. Currently, the most common failure mode of oil-containing bearings is lubrication failure. When the oil-containing bearing is working, due to the high-speed rotation of the shaft, the lubricating oil pre-immersed in the oil-containing bearing to form the surface oil film is easily thrown out from the end faces of the shaft hole of the oil-containing bearing. Over time, the lubricating oil pre-immersed in the oil-containing bearing will be consumed. Once the lubricating oil is consumed, the oil-containing bearing will not be able to play a lubricating effect. Therefore, equipment maintenance personnel often need to frequently pay attention to the operation of the oil-containing bearing and replace it with a new bearing with sufficient oil content in time, which makes 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. Summary of the invention

[0004] The present invention overcomes the deficiencies of the above-mentioned technology and provides a long-life oil-containing bearing.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A long-life oil-containing bearing 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 reflux section 22 with an aperture gradually increasing from the inside to the outside, and the end of the oil receiving and reflux section 22 with a small aperture is connected to the contact section 21.

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

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

[0009] Preferably, both ends of the shaft hole 2 and the outer wall surface of the bearing body 1 are transitioned 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 receiving reflux section 22 is an inclined surface, a curved surface or a stepped surface.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[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 rotating shaft to rotate, and the two ends of the contact section are respectively provided with oil receiving and returning sections, and the aperture of the oil receiving and returning sections 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 thrown out is actually thrown out from the gap between the rotating shaft and the contact section, and the thrown out lubricating oil will splash onto the oil receiving and returning section. The lubricating oil splashed upward onto the oil receiving and returning section can flow back to the contact section along the oil receiving and returning section or re-penetrate into the bearing body, and part of the lubricating oil splashed downward onto the oil receiving and returning section can also re-penetrate into the bearing body, so that 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 the lubricating oil being thrown out. DETAILED DESCRIPTION

[0020] The features of the present invention and other related features are further described in detail below through embodiments 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 reflux section 22 with an aperture gradually increasing from the inside to the outside, and the end of the oil receiving and reflux section 22 with a small 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 outward from the gap between the shaft and the two ends of the shaft hole, which will cause the lubricating oil to be lost and accelerate the failure of the oil-containing bearing.

[0023] As mentioned above, the shaft hole 2 of the oil-containing bearing in this case includes a contact section 21 and an oil receiving and returning section 22, wherein the contact section 21 is mainly used to contact with the rotating shaft and support the rotating shaft to rotate, and the two ends of the contact section 21 are respectively provided with oil receiving and returning sections 22, and the aperture of the oil receiving and returning 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 case, the lubricating oil thrown out is actually thrown out from the gap between the rotating shaft and the contact section 21, and the thrown out lubricating oil will splash onto the oil receiving and returning section 22. The lubricating oil splashed upward onto the oil receiving and returning section 22 can flow back to the contact section 21 along the oil receiving and returning section 22 or re-penetrate into the bearing body 1, and part of the lubricating oil splashed downward onto the oil receiving and returning section 22 can also re-penetrate into the bearing body 1, so that 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.

[0024] like Figure 1 to Figure 2 As shown, preferably, the thickness of the bearing body 1 is D, the length of the oil receiving return 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 return 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 Figure 1 to Figure 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 the excessive increase in the aperture 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, in the present case, both ends of the side wall surface of the bearing body 1 are respectively provided with a trimming section 12, and the trimming section 12 at the same end and the oil receiving 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 receiving 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, which can reduce wear and noise.

[0029] like Figure 1 to Figure 2 As shown, preferably, the radius of the arc surface 11 is R, and R=0.1L, so that 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 with 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 receiving 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 reflux section 22 is an inclined surface, an arc surface or a step 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 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 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 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 hole diameter gradually increasing from the inside to the outside, and the end of the oil receiving and returning section (22) with a small hole diameter 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 receiving 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, 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. A 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. A 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, a curved surface or a stepped surface.

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