Oil leakage prevention device

Abstract

The utility model discloses an oil leakage prevention device, which adopts a bearing spacer sleeve, a bearing body, a bearing gland, a framework seal and a centrifugal oil pan, the centrifugal oil pan is additionally arranged between the bearing and the framework oil seal, and the centrifugal oil pan plays three roles of isolating oil directly flowing out of the bearing and directly returning the isolated oil to an oil chamber below a bearing chamber; and secondly, oil splashed on a bearing gland is sent back to a bearing chamber by a centrifugal oil pan with a certain angle under the action of centrifugal force of rotation of the pump. And thirdly, the remaining atomized oil which enters the vicinity of the framework oil seal is conveyed to the outer side of the interior of the centrifugal oil pan by adopting the centrifugal force again, and then passes through a centrifugal oil return inclined hole with a certain angle to be conveyed back to a bearing chamber by virtue of the centrifugal force. According to the utility model, 30% of lubricating oil (grease) can be saved every year; no oil pollution is generated on a production site; accidents caused by oil shortage operation due to oil leakage of the bearing are reduced; the manufacturing cost for refitting new equipment is very low, and the cost is increased by about less than 1%.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing box (body) sealing, and in particular discloses an oil leakage prevention device. Background Art

[0002] Nowadays, the external output shaft of the bearing box (body) of many equipment is sealed with a skeleton oil seal to prevent external water and dust from entering the bearing body and to prevent the lubricating oil of the bearing body from leaking to the outside.

[0003] like Figure 1 and Figure 2 As shown, the existing skeleton oil seal structure includes a bearing sleeve 3, a bearing gland 1 and a skeleton seal 2. After research, it was found that this skeleton oil seal structure is prone to leakage, mainly due to the following reasons:

[0004] The main reason is that, on the one hand, the oil stirred by the bearing 5 splashes onto the bearing cover 1, and then the flowing oil 6 drips onto the main shaft 4 and is partially adsorbed on the main shaft 4. On the other hand, the oil 6 stirred by the bearing 5 flows directly from the end near the skeleton oil seal 2, and there is a thick layer of oil 6 on the entire main shaft 4. Observation with specialized equipment found that the thickness of the oil 6 reached about 10mm.

[0005] In the existing technology, many mechanical products, especially pumps and fans, mostly adopt the above structure. Therefore, oil leakage of pumps and fans is relatively common on site, and this problem needs to be solved urgently. Utility Model Content

[0006] The utility model provides an oil leakage prevention device, aiming to solve at least one of the above-mentioned defects of the existing skeleton oil seal structure.

[0007] The utility model relates to an oil leakage prevention device, comprising:

[0008] The bearing stopper sleeve is mounted on the main shaft;

[0009] The bearing body is sleeved on the bearing;

[0010] A bearing gland, fixedly connected to one end of the bearing body;

[0011] The skeleton seal is vertically arranged between the bearing gland and the bearing retaining sleeve;

[0012] The centrifugal oil pan is arranged transversely between the bearing sleeve and the bearing.

[0013] Furthermore, the centrifugal oil pan includes a pan body and a centrifugal portion extending laterally and obliquely along an outer end portion of the pan body and toward one end of the skeleton seal, and the centrifugal portion extends into the cavity of the skeleton seal.

[0014] Furthermore, a centrifugal oil return inclined hole is provided at the corner between the centrifugal part and the disc body.

[0015] Furthermore, an undercut portion matching the centrifugal portion extends in a vertical direction along the inner end portion of the bearing cover.

[0016] Furthermore, there is a fixed gap between the centrifugal portion and the undercut portion.

[0017] Furthermore, the fixed gap between the centrifugal portion and the undercut portion is 0.3 to 0.5 mm.

[0018] Furthermore, the engagement margin between the undercut portion and the frame seal is 3 to 5 mm.

[0019] Furthermore, the inclination angle of the centrifugal portion is 30 to 45 degrees.

[0020] Furthermore, the inclination angle of the centrifugal oil return inclined hole is 25 to 45 degrees.

[0021] Furthermore, the centrifugal oil return inclined hole has a diameter of 5 to 6 mm.

[0022] The beneficial effects achieved by the utility model are:

[0023] The utility model provides an oil leakage prevention device that utilizes a bearing retainer sleeve, a bearing body, a bearing pressure cover, a skeleton seal, and a centrifugal oil pan. A centrifugal oil pan is added between the bearing and the skeleton oil seal. The centrifugal oil pan serves three functions: first, it isolates the oil that flows directly out of the bearing, returning the isolated oil directly to the oil chamber below the bearing chamber. Second, the oil that splashes onto the bearing pressure cover is returned to the bearing chamber by the centrifugal oil pan at a certain angle under the centrifugal force of the pump's own rotation. Third, the remaining mist oil that has entered the vicinity of the skeleton oil seal is again centrifugally transported to the outer side of the centrifugal oil pan, and then returned to the bearing chamber through a centrifugal oil return inclined hole at a certain angle. The utility model provides an oil leakage prevention device that saves 30% of the amount of lubricating oil (grease) added annually; eliminates oil pollution in the production site; reduces accidents caused by oil-deficient operation due to bearing oil leakage; and has a very low manufacturing cost for retrofitting new equipment, with an increase in cost of less than 1%. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a conventional oil leakage prevention device;

[0025] Figure 2 for Figure 1 A partial enlarged schematic diagram of part A;

[0026] Figure 3 This is a structural diagram of an embodiment of the oil leakage prevention device of the utility model;

[0027] Figure 4This is a partially enlarged analysis diagram of an embodiment of the oil leakage prevention device of the present utility model;

[0028] Figure 5 for Figure 4 A partial enlarged schematic diagram of part B;

[0029] Figure 6 for Figure 4 A partial enlarged schematic diagram of part C in the middle;

[0030] Figure 7 This is a schematic diagram showing the determination of key dimensions in the first embodiment of the oil leakage prevention device of the present utility model;

[0031] Figure 8 This is a schematic diagram showing the determination of key dimensions in the second embodiment of the oil leakage prevention device of the present utility model;

[0032] Figure 9 This is a schematic diagram of determining the key dimensions of the third embodiment of the oil leakage prevention device of the present invention.

[0033] Description of Figure Numbers:

[0034] 10. Bearing sleeve; 20. Bearing body; 30. Bearing cover; 40. Skeleton seal; 50. Centrifugal oil pan; 51. Pan body; 52. Centrifugal part; 53. Centrifugal oil return inclined hole; 31. Undercut part; 60. Main shaft; 70. Bearing; 80. Screw. DETAILED DESCRIPTION

[0035] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0036] like Figure 3 and Figure 4 As shown, the first embodiment of the present invention proposes an oil leakage prevention device, including a bearing sleeve 10, a bearing body 20, a bearing pressure cover 30, a skeleton seal 40 and a centrifugal oil pan 50, wherein the bearing sleeve 10 is sleeved on the main shaft 60; the bearing body 20 is sleeved on the bearing 70; the bearing pressure cover 30 is fixedly connected to one end of the bearing body 20; the skeleton seal 40 is vertically arranged between the bearing pressure cover 30 and the bearing sleeve 10; and the centrifugal oil pan 50 is horizontally arranged between the bearing sleeve 10 and the bearing. The oil leakage prevention device proposed in this embodiment fixes the bearing pressure cover 30 to one end of the bearing body 20 by screws 80, and by adding a centrifugal oil pan 50 between the bearing 70 and the skeleton oil seal 40, it solves the problem of bearing body oil leakage under simple structural design conditions (typically in water pump fans).

[0037] In the above structure, see Figures 3 to 9The oil leakage prevention device proposed in this embodiment comprises a centrifugal oil pan 50 comprising a pan body 51 and a centrifugal portion 52 extending obliquely from the outer end of the pan body 51 toward one end of the skeleton seal 40. The centrifugal portion 52 extends into the cavity of the skeleton seal 40. This device, in turn, conveys oil splashing onto the bearing gland back into the bearing chamber via the centrifugal portion 52 under the centrifugal force of the pump's rotation, thereby reducing accidents caused by oil-starved operation due to bearing leakage.

[0038] Preferably, see Figures 3 to 9 The oil leakage prevention device proposed in this embodiment features an inclined centrifugal oil return hole 53 at the corner between the centrifugal portion 52 and the disc body 51. An undercut 31, matching the centrifugal portion 52, extends vertically along the inner end of the bearing gland 30. A fixed gap is defined between the centrifugal portion 52 and the undercut 31. The fixed gap between the centrifugal portion 52 and the undercut 31 is 0.3 to 0.5 mm. The margin of engagement between the undercut 31 and the skeleton seal 40 is 3 to 5 mm. The inclination angle of the centrifugal portion 52 is 30 to 45°. The inclination angle of the inclined centrifugal oil return hole 53 is 25 to 45°, and the diameter of the inclined centrifugal oil return hole 53 is 5 to 6 mm. The oil leakage prevention device proposed in this embodiment has a simple structure and excellent sealing effect. Common steel can be used. However, repeated testing has revealed that various dimensions and angles significantly impact oil leakage prevention. Key dimensions are determined below, as shown in Table 1.

[0039] Table 1 Determination of critical dimensions

[0040]

[0041]

[0042] like Figures 1 to 9 As shown, the oil leakage prevention device provided in this embodiment has the following working principle:

[0043] A centrifugal oil pan 50 is installed between the bearing 70 and the skeleton oil seal 40. This pan serves three purposes: First, it isolates the oil flowing directly out of the bearing 70, returning the isolated oil directly to the oil chamber below the bearing cavity. Second, the centrifugal oil pan 50, which is angled to return oil splashing onto the bearing gland 30, uses the centrifugal force of the pump's rotation to return it to the bearing chamber. Third, any remaining mist oil that has entered the vicinity of the skeleton oil seal 40 is centrifugally transported to the outer side of the centrifugal oil pan 50, where it is then centrifugally returned to the bearing chamber through the angled centrifugal oil return holes 53.

[0044] This embodiment provides an oil leakage prevention device. Compared to the prior art, it utilizes a bearing retainer sleeve, a bearing body, a bearing gland, a skeleton seal, and a centrifugal oil pan. A centrifugal oil pan is added between the bearing and the skeleton oil seal. The centrifugal oil pan serves three functions: First, it isolates oil flowing directly out of the bearing, returning the isolated oil directly to the oil chamber below the bearing cavity. Second, the centrifugal oil pan, which is angled, returns oil splashing onto the bearing gland to the bearing chamber under the centrifugal force of the pump's own rotation. Third, any remaining mist oil that has entered the vicinity of the skeleton oil seal is centrifugally returned to the outer side of the centrifugal oil pan, where it is then centrifugally returned to the bearing chamber through an angled centrifugal oil return hole. This embodiment provides an oil leakage prevention device that saves 30% of lubricating oil (grease) annually; eliminates oil contamination on the production site; reduces accidents caused by oil-starved operation due to bearing oil leakage; and offers a very low manufacturing cost, increasing costs by less than 1%.

[0045] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Clearly, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, to the extent such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to encompass such changes and modifications.

Claims

1. An oil leakage prevention device, characterized in that: include: A bearing stopper sleeve (10) is sleeved on the main shaft; A bearing body (20) is sleeved on the bearing; A bearing cover (30) fixedly connected to one end of the bearing body (20); A skeleton seal (40) is vertically arranged between the bearing gland (30) and the bearing stopper sleeve (10); A centrifugal oil pan (50) is transversely arranged between the bearing stopper sleeve (10) and the bearing; The centrifugal oil pan (50) comprises a pan body (51), and a centrifugal portion (52) extending laterally and obliquely along the outer end of the pan body (51) and toward one end of the skeleton seal (40), wherein the centrifugal portion (52) extends into the cavity of the skeleton seal (40); a centrifugal oil return inclined hole (53) is provided at a corner between the centrifugal portion (52) and the pan body (51).

2. The oil leakage prevention device according to claim 1, characterized in that: An undercut portion (31) matching the centrifugal portion (52) extends in a vertical direction from the inner end portion of the bearing cover (30).

3. The oil leakage prevention device according to claim 2, characterized in that: There is a fixed gap between the centrifugal portion (52) and the undercut portion (31).

4. The oil leakage prevention device according to claim 3, characterized in that: The fixed gap between the centrifugal portion (52) and the undercut portion (31) is 0.3-0.5 mm.

5. The oil leakage prevention device according to claim 3, characterized in that: The engagement margin between the undercut portion (31) and the skeleton seal (40) is 3-5 mm.

6. The oil leakage prevention device according to claim 3, characterized in that: The inclination angle of the centrifugal portion (52) is 30-45°.

7. The oil leakage prevention device according to claim 3, characterized in that: The inclination angle of the centrifugal oil return inclined hole (53) is 25-45°.

8. The oil leakage prevention device according to claim 3, characterized in that: The centrifugal oil return inclined hole (53) has a centrifugal oil return inclined hole diameter of 5 to 6 mm.

Images