Oil seal structure for bearing box
The symmetrically arranged oil seal flange and oil retaining ring structure, combined with a variety of sealing designs, solves the problem of bearing box lubricating oil leakage, achieves good sealing and convenient maintenance, and improves the equipment's operational reliability and environmental friendliness.
Patent Information
- Application Number
- CN202422433406.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The oil seal structure of the existing bearing box has poor sealing performance, which causes lubricating oil leakage, pollutes the environment and is inconvenient for equipment maintenance.
The symmetrically arranged oil seal flange and oil retaining ring are combined with the raised tail edge, skirt, oil seal labyrinth, felt ring and O-ring. They are fastened to the bearing housing by flange bolts to ensure sealing, and are made of aluminum to reduce friction damage.
It improves the sealing of the bearing box, reduces lubricating oil leakage, optimizes the use experience and environmental friendliness of the equipment, and facilitates maintenance and component replacement.
Smart Images
Figure CN223375093U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearing seals, in particular to an oil seal structure for a bearing box. Background Art
[0002] The bearing box is one of the core components in mechanical transmission. Its reliability ensures the normal operation of the machinery. In actual field use, the bearing box adopts two types of lubrication: grease lubrication and oil lubrication. Among them, oil lubrication uses liquid lubricating oil as the lubricating medium, so a reliable sealing device is required to ensure that the lubricating oil does not leak.
[0003] In the prior art, an oil seal labyrinth is usually used to prevent the leakage of lubricating oil. However, this sealing structure does not completely block the lubricating oil and has poor sealing performance. The leaked lubricating oil will pollute the environment and make the environment where the equipment is located very dirty. Generally, users at the use site pay attention to the cleanliness of the use site, and oil leakage is contrary to this. Utility Model Content
[0004] In order to improve the lubricating oil leakage problem in the above-mentioned background technology, the utility model provides an oil seal structure for a bearing box.
[0005] The utility model provides an oil seal structure for a bearing box adopts the following technical solutions:
[0006] An oil seal structure for a bearing box, comprising a bearing box body, a bearing arranged inside the bearing box body, the bearing being sleeved on a main shaft, oil grooves being arranged on both sides of the bearing and sealed with the bearing box body through oil seal flanges, the oil grooves being connected to an oil tank, an oil retaining ring being arranged on the side of the oil seal flange close to the bearing, the oil seal flange and the oil retaining ring being sleeved on the main shaft and the oil seal flanges and the oil retaining rings on both sides of the bearing being symmetrically arranged, and the outer edges of the oil seal flanges being fastened to both sides of the bearing box body by flange bolts.
[0007] Preferably, the inner edge of the oil seal flange is provided with a raised tail edge, and the outer edge of the oil deflector ring is provided with a skirt edge, and the skirt edge covers the tail edge and blocks the gap between the oil seal flange and the oil deflector ring.
[0008] Preferably, an oil seal labyrinth is provided at the contact position between the inner ring of the oil seal flange and the main shaft, and the oil seal labyrinth is connected to the oil tank through the oil return channel at the bottom of the oil seal flange.
[0009] Preferably, a felt ring is provided at the contact position between the inner ring of the oil seal flange and the main shaft, and the felt ring is located on the side of the oil seal labyrinth away from the bearing.
[0010] Preferably, an annular groove is provided at the position where the outer edge of the oil seal flange contacts the bearing box body, and an O-ring is provided in the annular groove.
[0011] Preferably, the oil seal flange and the oil retaining ring both adopt a center-split structure, and the oil retaining ring comprises an upper half ring and a lower half ring, and the upper half ring and the lower half ring are fixedly connected by fastening bolts.
[0012] Preferably, the oil seal flange and the oil retaining ring are both arranged coaxially with the main shaft.
[0013] Preferably, the oil seal flange and the oil retaining ring are both made of aluminum.
[0014] In summary, the present invention has the following beneficial technical effects:
[0015] 1. The oil seal structure in this utility model has good sealing performance. The oil seal flanges and oil retaining rings symmetrically arranged on both sides of the bearing cooperate with each other, which greatly reduces the occurrence of oil leakage in the oil tanks at both ends of the bearing box, ensures the normal operation of the equipment, optimizes the user experience, and is more environmentally friendly.
[0016] 2. The oil seal flange is installed in flange mode. The connection between the oil seal flange and the bearing box body is tighter, and there is no need to consider the fitting clearance. At the same time, it facilitates the work of maintenance personnel and improves the ease of use.
[0017] 3. The outer edge of the oil seal flange is fastened to both sides of the bearing box body by flange bolts. Both oil seal flanges are fixed to the bearing box body, avoiding the rotation of the oil seal flange and ensuring the sealing and oil return of the felt ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a structural perspective view of an oil seal structure for a bearing box according to an embodiment of the utility model;
[0019] Figure 2 yes Figure 1 A in the middle is an enlarged schematic diagram;
[0020] Figure 3 This is a structural perspective view of an oil seal flange according to an embodiment of the present invention;
[0021] Figure 4 This is a partial structural diagram of the oil deflector ring according to an embodiment of the present utility model;
[0022] Figure 5 It is a schematic diagram of the installation of the oil deflector ring according to the embodiment of the present utility model.
[0023] Explanation of the accompanying symbols: 1. Bearing box body; 2. Bearing; 3. Main shaft; 4. Oil tank; 5. Oil seal flange; 6. Oil retaining ring; 7. Flange bolt; 8. Tail edge; 9. Skirt; 10. Oil seal maze; 11. Oil return channel; 12. Annular groove; 13. O-ring; 14. Felt ring; 15. Upper half ring; 16. Lower half ring; 17. Fastening bolt; 18. Oil tank. DETAILED DESCRIPTION
[0024] The following combination Figure 1-Figure 5 The utility model is described in further detail.
[0025] The embodiment of the utility model discloses an oil seal structure for a bearing box. The bearing box is matched with ventilator equipment.
[0026] Reference Figure 1 A bearing box oil seal structure includes a bearing box body 1, a bearing 2 is arranged inside the bearing box body 1, the bearing 2 is sleeved on the main shaft 3, oil grooves 4 are provided on both sides of the bearing 2 and are sealed with the bearing box body 1 through an oil seal flange 5, the oil groove 4 is connected to the oil tank 18, and an oil retaining ring 6 is provided on the side of the oil seal flange 5 close to the bearing 2. The oil seal flange 5 and the oil retaining ring 6 are both sleeved on the main shaft 3 and the oil seal flange 5 and the oil retaining ring 6 on both sides of the bearing 2 are symmetrically arranged, and the outer edge of the oil seal flange 5 is fastened to both sides of the bearing box body 1 by flange bolts 7.
[0027] Reference Figure 1 、 Figure 2 、 Figure 4 The inner edge of the oil seal flange 5 is provided with a raised tail edge 8, and the outer edge of the oil retaining ring 6 is provided with a skirt edge 9. The skirt edge 9 covers the tail edge 8 and blocks the gap between the oil seal flange 5 and the oil retaining ring 6 to reduce the leakage of lubricating oil.
[0028] Reference Figure 1 、 Figure 3 An oil seal labyrinth 10 is provided at the contact position between the inner ring of the oil seal flange 5 and the main shaft 3 , and the oil seal labyrinth 10 is connected to the oil tank 4 through the oil return channel 11 at the bottom of the oil seal flange 5 .
[0029] Reference Figure 1 、 Figure 3 A felt ring 14 is provided at the contact position between the inner ring of the oil seal flange 5 and the main shaft 3. The felt ring 14 is located on the side of the oil seal maze 10 away from the bearing 2. Due to the presence of the felt ring 14 in the oil seal flange 5, in some cases, the gap between the felt ring 14 and the main shaft 3 is too small or even there is no gap, which will cause the main shaft 3 to generate a rotational force on the oil seal flange 5 during rotation. The oil seal flange 5 adopts a flange mounting structure and is fixedly connected to the bearing box body 1, which avoids the rotation of the oil seal flange 5 and ensures the sealing and oil return of the felt ring 14.
[0030] Reference Figure 1 、 Figure 3 An annular groove 12 is provided at the contact position between the outer edge of the oil seal flange 5 and the bearing box body 1 and an O-ring 13 is provided in the annular groove 12 .
[0031] Reference Figure 1 、 Figure 5The oil seal flange 5 and the oil retaining ring 6 both adopt a center-split structure. The oil retaining ring 6 includes an upper half ring 15 and a lower half ring 16. The upper half ring 15 and the lower half ring 16 are fixedly connected by fastening bolts 17. The oil seal flange 5 can be disassembled and assembled without disassembling the bearing box body 1, which is convenient for maintenance and replacement of oil seal components.
[0032] Reference Figure 1 The oil seal flange 5 and the oil retaining ring 6 are both arranged coaxially with the main shaft 3 to reduce damage caused by friction with the main shaft 3.
[0033] Reference Figure 1 The oil seal flange 5 and the oil retaining ring 6 are both made of aluminum. Due to processing errors or improper installation, the oil seal flange 5 is eccentric, which will cause the oil seal flange 5 to directly contact the main shaft 3. The aluminum material can protect the main shaft 3 from excessive damage due to friction. Moreover, aluminum is easier to process and lighter than carbon steel.
[0034] The implementation principle of the oil seal structure for a bearing box in the embodiment of the utility model is as follows:
[0035] During the rotation of the main shaft 3, the lubricating oil in the oil groove 4 lubricates the bearing 2. A portion of the lubricating oil flows onto the main shaft 3 under the action of gravity. Over time, the lubricating oil on the main shaft 3 flows along the main shaft 3 to both ends of the main shaft 3. The lubricating oil first reaches the oil retaining ring 6, where it accumulates and flows to the edge of the oil retaining ring 6, where it is divided into three parts:
[0036] The oil retaining ring 6 rotates with the main shaft 3, and under the action of centrifugal force, part of the lubricating oil will be thrown back to the oil tank 4;
[0037] A portion of the lubricating oil will reach the gap between the oil seal flange 5 and the bearing housing 1 and flow out, but will be blocked by the annular groove 12 on the flange joint surface, where it will be collected and flow back to the oil tank 4 under the action of gravity.
[0038] A small amount of lubricating oil still enters the gap between the oil seal flange 5 and the oil retaining ring 6 and flows out along the main shaft 3. This part of the lubricating oil will pass through the oil seal maze 10 of the oil seal flange 5. Under the obstruction of the layers of oil seal maze 10, the lubricating oil gathers and connects to the oil tank 4 through the oil return channel 11 at the bottom of the oil seal flange 5.
[0039] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.
Claims
1. An oil seal structure for a bearing box, characterized in that: The invention comprises a bearing box body (1), wherein a bearing (2) is arranged inside the bearing box body (1), and the bearing (2) is sleeved on the main shaft (3), and oil grooves (4) are arranged on both sides of the bearing (2) and are sealed by an oil seal flange (5) in conjunction with the bearing box body (1), and an oil retaining ring (6) is arranged on the side of the oil seal flange (5) close to the bearing (2), and the oil seal flange (5) and the oil retaining ring (6) are both sleeved on the main shaft (3) and the oil seal flange (5) and the oil retaining ring (6) on both sides of the bearing (2) are symmetrically arranged, and the outer edge of the oil seal flange (5) is fastened to both sides of the bearing box body (1) by flange bolts (7).
2. The oil seal structure for a bearing box according to claim 1, characterized in that: The inner edge of the oil seal flange (5) is provided with a raised tail edge (8), and the outer edge of the oil retaining ring (6) is provided with a skirt edge (9), and the skirt edge (9) covers the tail edge (8) and blocks the gap between the oil seal flange (5) and the oil retaining ring (6).
3. The oil seal structure for a bearing box according to claim 1, characterized in that: An oil seal labyrinth (10) is provided at the contact position between the inner ring of the oil seal flange (5) and the main shaft (3), and the oil seal labyrinth (10) is connected to the oil tank (4) through an oil return channel (11) at the bottom of the oil seal flange (5).
4. The oil seal structure for a bearing box according to claim 3, characterized in that: A felt ring (14) is provided at the contact position between the inner ring of the oil seal flange (5) and the main shaft (3), and the felt ring (14) is located on the side of the oil seal labyrinth (10) away from the bearing (2).
5. The oil seal structure for a bearing box according to claim 1, characterized in that: An annular groove (12) is provided at a position where the outer edge of the oil seal flange (5) contacts the bearing box body (1), and an O-type sealing ring (13) is provided in the annular groove (12).
6. The oil seal structure for a bearing box according to claim 1, characterized in that: The oil seal flange (5) and the oil retaining ring (6) both adopt a center-split structure. The oil retaining ring (6) comprises an upper half ring (15) and a lower half ring (16). The upper half ring (15) and the lower half ring (16) are fixedly connected by fastening bolts (17).
7. The oil seal structure for a bearing box according to claim 6, characterized in that: The oil seal flange (5) and the oil retaining ring (6) are both arranged coaxially with the main shaft (3).
8. The oil seal structure for a bearing box according to claim 6, characterized in that: The oil seal flange (5) and the oil retaining ring (6) are both made of aluminum.