阅读说明：本技术 轴承防漏油结构 (Bearing oil leakage prevention structure ) 是由 刘敏 张学斌 张赓 孙建国 于 2020-08-18 设计创作，主要内容包括：本发明公开了一种轴承防漏油结构,其涉及轴承领域,技术方案要点包括主轴、轴承和气封环,所述气封环与主轴之间设置有圆锥接合面；所述圆锥接合面,即所述主轴与气封环的径向间隙沿轴向呈递减设置,且所述轴承位于径向间隙较大的一侧。本发明能够实现防漏油的功能,同时具有不产生机械损耗、不发热、没有旋转方向要求、不受补偿压力大小影响、不会因磨损而失效以及实施效果恒定的优势。(The invention discloses an oil leakage prevention structure of a bearing, which relates to the field of bearings, and adopts the technical scheme that the oil leakage prevention structure comprises a main shaft, the bearing and an air seal ring, wherein a conical joint surface is arranged between the air seal ring and the main shaft; the conical joint surface, namely the radial gap between the main shaft and the gas seal ring, is arranged in a descending manner along the axial direction, and the bearing is positioned on one side with larger radial gap. The oil leakage prevention device can realize the oil leakage prevention function, and has the advantages of no mechanical loss, no heating, no requirement on the rotation direction, no influence of the compensation pressure, no failure caused by abrasion and constant implementation effect.)

1. The utility model provides a bearing leak protection oil structure which characterized in that: the air seal device comprises a main shaft, a bearing and an air seal ring, wherein a conical joint surface is arranged between the air seal ring and the main shaft; the conical joint surface, namely the radial gap between the main shaft and the gas seal ring, is arranged in a descending manner along the axial direction, and the bearing is positioned on one side with larger radial gap.

2. The oil leakage preventing structure of a bearing of claim 1, wherein: the axial length of the conical joint surface is more than or equal to 1 mm.

3. The oil leakage preventing structure of a bearing of claim 1, wherein: the radial clearance of the conical joint surface is 0.1 mm-5 mm.

4. The oil leakage preventing structure of a bearing of claim 1, wherein: the relative conical angle of the conical joint surface is 0.1-22.5 degrees.

5. The oil leakage preventing structure of a bearing of claim 1, wherein: the conical joint surface comprises a first conical surface arranged on the outer circumferential side wall of the main shaft or a second conical surface arranged on the inner circumferential side wall of the air seal ring.

6. The oil leakage preventing structure of a bearing of claim 1, wherein: the conical joint surface comprises a first conical surface arranged on the outer circumferential side wall of the main shaft and a second conical surface arranged on the inner circumferential side wall of the air seal ring.

7. The oil leakage preventing structure of a bearing of claim 1, wherein: an outer oil seal ring and an inner oil seal ring are respectively arranged on two sides of the bearing, the air seal ring is connected with the inner oil seal ring, and the conical joint surface is arranged between the inner oil seal ring and the main shaft.

8. The oil leakage preventing structure of a bearing of claim 7, wherein: the conical joint surface is arranged between the outer oil seal ring and the main shaft.

9. The utility model provides a bearing leak protection oil structure which characterized in that: the dust seal device comprises a main shaft, a bearing, and a bearing inner end cover and a bearing outer end cover which are respectively positioned on two sides of the bearing, wherein a dust seal ring matched with the bearing outer end cover is arranged on the main shaft, and a conical joint surface is arranged between the dust seal ring and the bearing outer end cover; the conical joint surface, namely the radial gap between the main shaft and the dust seal ring, is arranged in a descending manner along the axial direction, and the bearing is positioned on one side with a larger radial gap.

10. The oil leakage preventing structure of a bearing of claim 9, wherein: the conical joint surface is arranged between the bearing inner end cover and the main shaft.

Technical Field

The invention relates to the field of bearings, in particular to an oil leakage prevention structure of a bearing.

Background

In rotary machines, sliding bearings and/or rolling bearings lubricated with lubricating oil are often selected. When the equipment runs, air in the equipment can form a negative pressure area on the inner side of the bearing under the action of external force such as a rotating mechanism such as a fan or an external fan, namely the air pressure in the area is lower than the air pressure outside the equipment and/or inside the bearing box, so that oil mist in the bearing box can enter the equipment through a gap at a through part of the shaft under the action of negative pressure, oil drops are formed after condensation, and the oil leakage phenomenon of the bearing is generated.

The oil leakage of the bearing not only causes resource waste and environmental pollution, but also can cause electric damage and even explosion in serious cases.

The existing scheme for solving the problem of oil leakage of the bearing and the advantages and disadvantages thereof are shown in the following table:

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disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an oil leakage prevention structure of a bearing, which can realize the oil leakage prevention function and has the advantages of no mechanical loss, no heat generation, no requirement on the rotation direction, no influence of the compensation pressure, no failure caused by abrasion and constant implementation effect.

In order to achieve the purpose, the invention provides the following technical scheme:

a bearing oil leakage prevention structure comprises a main shaft, a bearing and an air seal ring, wherein a conical joint surface is arranged between the air seal ring and the main shaft; the conical joint surface, namely the radial gap between the main shaft and the gas seal ring, is arranged in a descending manner along the axial direction, and the bearing is positioned on one side with larger radial gap.

Further, the axial length of the conical joint surface is more than or equal to 1 mm.

Furthermore, the radial clearance of the conical joint surface is 0.1 mm-5 mm.

Further, the relative conical angle of the conical joint surface is 0.1-22.5 degrees.

Furthermore, the conical joint surface comprises a first conical surface arranged on the outer circumferential side wall of the main shaft or a second conical surface arranged on the inner circumferential side wall of the air seal ring.

Furthermore, the conical joint surface comprises a first conical surface arranged on the outer circumferential side wall of the main shaft and a second conical surface arranged on the inner circumferential side wall of the air seal ring.

Furthermore, an outer oil seal ring and an inner oil seal ring are respectively arranged on two sides of the bearing, the air seal ring is connected with the inner oil seal ring, and the conical joint surface is arranged between the inner oil seal ring and the main shaft.

Further, the conical joint surface is arranged between the outer oil seal ring and the main shaft.

Aiming at the defects in the prior art, the invention also provides an oil leakage prevention structure for the bearing, which comprises a main shaft, the bearing, and a bearing inner end cover and a bearing outer end cover which are respectively positioned at two sides of the bearing, wherein a dust seal ring matched with the bearing outer end cover is arranged on the main shaft, and a conical joint surface is arranged between the dust seal ring and the bearing outer end cover; the conical joint surface, namely the radial gap between the outer end cover of the bearing and the dust seal ring, is arranged in a descending manner along the axial direction, and the bearing is positioned on one side with a larger radial gap.

Furthermore, the conical joint surface is arranged between the bearing inner end cover and the main shaft.

In conclusion, the invention has the following beneficial effects:

1. the oil leakage prevention device can realize the oil leakage prevention function, and has the advantages of no mechanical loss, no heating, no requirement on the rotation direction, no influence of the compensation pressure, no failure due to abrasion and constant implementation effect;

2. the invention can solve the problems of resource waste and environmental pollution caused by oil leakage, reduce the failure rate of electrical equipment and avoid explosion caused by explosive environment.

Drawings

FIG. 1 is a schematic view of an oil leakage preventing structure of a bearing in embodiment 1;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of an oil leakage preventing structure of a bearing in embodiment 2;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is an enlarged view of portion C of FIG. 3;

FIG. 6 is a schematic view of an oil leakage preventing structure of a bearing in embodiment 3;

FIG. 7 is an enlarged view of portion D of FIG. 6;

fig. 8 is an enlarged schematic view of portion E of fig. 6.

In the figure: 1. a main shaft; 11. a first conical surface; 12. a third conical surface; 13. a fourth conical surface; 14. a ninth conical surface; 2. a bearing; 3. an outer oil seal ring; 4. an inner oil seal ring; 5. an air seal ring; 51. a second conical surface; 6. an inner fan; 7. a dust seal ring; 71. a fifth conical surface; 72. a sixth conical surface; 73. a seventh conical surface; 8. a bearing outer end cover; 9. an inner end cover of the bearing; 91. an eighth conical surface.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.