Bearing sealing structure
The double-layer oil seal structure solves the problem of bearing lubricating grease leakage, achieves efficient sealing, and enhances the sealing performance and service life of the bearing.
Patent Information
- Application Number
- CN202422742735.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-11-11
AI Technical Summary
In existing technologies, bearings are prone to lubricant leakage during use, and a single sealing ring is insufficient to effectively seal the leak, leading to lubricant leakage problems.
The system employs a double-layer oil seal structure, including a first oil seal and a second oil seal, which are spaced apart along the axial direction of the shaft by a connector. The connector contains a first chamber and a second chamber, which respectively contain lubricating grease. The two oil seals are used to prevent lubricating grease leakage multiple times.
It effectively improves the bearing sealing effect, prevents lubricant leakage, enhances sealing performance, and has a longer service life and good chemical stability, especially in high-temperature environments.
Smart Images
Figure CN223767950U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of ore processing technology, and more specifically, to a bearing sealing structure. Background Technology
[0002] Bearings typically require lubrication during use. The main lubrication methods include oil immersion lubrication and high-pressure oil injection lubrication. Taking oil immersion lubrication as an example, the process involves adding lubricating oil into the bearing housing, allowing the lower rotating parts of the bearing to be immersed in the oil. However, during routine maintenance, excessive lubricating oil is frequently added, leading to significant lubricating oil leakage. Related technologies simply use sealing rings on the bearing housing for sealing, but this method is insufficient for effective sealing, resulting in continued lubricating oil leakage during bearing operation. Utility Model Content
[0003] The purpose of this disclosure is to provide a bearing sealing structure that can effectively seal the bearing housing and prevent the leakage of lubricating grease from the bearing.
[0004] To achieve the above objectives, this disclosure provides a bearing sealing structure in which a rotating shaft is mounted on a bearing housing via a bearing and extends out of the bearing housing. The bearing sealing structure includes a first oil seal, which is sleeved on the rotating shaft and conforms to the bottom surface of the bearing housing, for sealing the gap between the outer wall of the rotating shaft and the bearing housing.
[0005] The second oil seal is sleeved on the rotating shaft and is spaced apart from the first oil seal along the axial direction of the rotating shaft;
[0006] A connector is fixedly connected to the bottom surface of the bearing seat and has a through hole for the rotating shaft to pass through. The connector also has a first chamber and a second chamber spaced apart along the axial direction of the rotating shaft. The first oil seal is located in the first chamber and the second oil seal is located in the second chamber.
[0007] Optionally, the connector is provided with an annular partition for separating the first chamber and the second chamber. The top surface of the first oil seal along the axial direction of the rotating shaft is in contact with the bearing seat, and the bottom surface is in contact with the annular partition. The top surface of the second oil seal along the axial direction of the rotating shaft is in contact with the annular partition, and the bottom surface is in contact with the bottom surface of the second chamber along the axial direction.
[0008] Optionally, the connector includes a cylindrical housing and a cover plate. The housing is tubular, and the annular partition is connected to the inner wall of the housing to divide the inner cavity of the housing into a first chamber and a second chamber. The cover plate is disposed on the axial end of the housing to close the second chamber.
[0009] Optionally, the bottom surface of the second oil seal along the axial direction of the rotating shaft is fitted to the cover plate, and the cover plate and the second oil seal are fixedly connected by silicone sealant.
[0010] Optionally, the first oil seal is annular in shape, and a first fastening spring is sleeved on its outer wall.
[0011] Optionally, the second oil seal includes an annular portion and an extension portion. The annular portion includes a first annular portion that fits against the inner wall of the second cavity, and a second annular portion that extends radially inward along the axis of rotation at the axial end of the first annular portion. The extension portion is connected to the second annular portion and extends obliquely upward along the radial direction of the axis of rotation to abut against the axis of rotation.
[0012] Optionally, a blocking member is provided at the end of the extension connected to the second annular portion, and a placement groove for placing the second fastening spring is formed between the blocking member and the extension.
[0013] Optionally, a support ring is also provided in the second chamber, one end of which is connected to the connector and the other end extends along the axial direction of the rotating shaft, and the support ring is attached to the inner wall of the second oil seal.
[0014] Optionally, the first oil seal and the second oil seal are made of fluororubber.
[0015] Optionally, the first oil seal, the second oil seal, and the connector are composed of a first part and a second part that are symmetrically connected to each other.
[0016] Compared with the prior art, the advantages of this utility model are as follows: The bearing sealing structure of this utility model includes a first oil seal, a second oil seal, and a connecting member. By providing two oil seals and a connecting member for connecting the two oil seals, the lubricating grease can be prevented from seeping out of the sealing structure twice when leakage occurs, thereby improving the sealing effect and preventing lubricating grease leakage. Furthermore, the first and second chambers in the connecting member can also assist the first and second oil seals in improving the sealing effect, further enhancing the sealing effect of the bearing sealing structure disclosed herein.
[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0018] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0019] Figure 1This is a cross-sectional view of the bearing seal structure provided in an exemplary embodiment of this disclosure;
[0020] Figure 2 This is a schematic diagram of the disassembled bearing seal structure provided in an exemplary embodiment of this disclosure.
[0021] Explanation of reference numerals in the attached figures
[0022] 1-First oil seal; 11-First fastening spring;
[0023] 2-Second oil seal; 21-Annular portion; 211-First annular portion; 212-Second annular portion; 22-Extension; 23-Blocking member; 24-Second fastening spring; 25-Placement groove;
[0024] 3-Connector; 31-First chamber; 32-Second chamber; 33-Annular partition; 34-Through hole; 35-Shell; 36-Cover plate; 37-Support ring;
[0025] 4-Shaft; 5-Bearing housing. Detailed Implementation
[0026] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0027] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "higher," "lower," "top," and "bottom" generally refer to the orientation of the corresponding component or structure in the direction of gravity. "Inner" and "outer" refer to the inner and outer contours of the corresponding component. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same element. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.
[0028] For ease of understanding, please refer to the appendix below. Figures 1 to 2 The specific structure and working principle of this disclosure will be explained in detail with reference to the embodiments.
[0029] This disclosure relates to a bearing sealing structure. When the rotating shaft 4 is mounted onto the bearing housing 5 via a bearing and passes through the bearing housing 5, a gap is created between the shaft 4 and the bearing housing 5. The bearing sealing structure of this disclosure can effectively seal this gap, preventing lubricating grease in the bearing from flowing out of the gap. See also... Figure 1 and Figure 2The bearing sealing structure disclosed herein includes a first oil seal 1, a second oil seal 2, and a connector 3. The first oil seal 1 is sleeved on the rotating shaft 4 and fits against the bottom surface of the bearing seat 5, which can seal the gap between the rotating shaft 4 and the bearing seat 5. The second oil seal 2 is also sleeved on the rotating shaft 4 and is spaced apart from the first oil seal 1 along the axial direction of the rotating shaft 4. The connector 3 is fixedly connected to the bearing seat 5, and has a through hole 34 for the rotating shaft 4 to pass through, as well as a first chamber 31 and a second chamber 32 arranged along the axial direction of the rotating shaft 4. The first oil seal 1 is located in the first chamber 31, and the second oil seal 2 is located in the second chamber 32.
[0030] When lubricating grease leaks from the bearing, it is first blocked by the first oil seal 1 in the first chamber 31. When the amount of lubricating grease that seeps out is too much and passes through the first oil seal 1, it will enter the second chamber 32, where the second oil seal 2 will block the leakage of lubricating grease. The first chamber 31 and the second chamber 32 can also accommodate a portion of the lubricating grease, thus greatly preventing the leakage of lubricating grease.
[0031] The bearing sealing structure disclosed herein, by providing two oil seals and a connector 3 for connecting the two oil seals, can prevent lubricating grease from seeping out of the sealing structure twice when lubricating grease leaks, thereby improving the sealing effect and preventing lubricating grease leakage. Furthermore, the first chamber 31 and the second chamber 32 in the connector 3 can also assist the first oil seal 1 and the second oil seal 2 in improving the sealing effect, further enhancing the sealing effect of the bearing sealing structure disclosed herein.
[0032] In one embodiment of this disclosure, see Figure 1 and Figure 2 The connector 3 is equipped with an annular partition 33 for separating the first chamber 31 and the second chamber 32. The center of the annular partition 33 is for the shaft 4 to pass through, and the outer wall is connected to the connector 3 to separate the first chamber 31 and the second chamber 32. When installing the first oil seal 1 and the second oil seal 2, the top surface of the first oil seal 1 along the axial direction of the shaft 4 should be fitted against the bearing seat 5, and the bottom surface should be fitted against the annular partition 33. Then, the top surface of the second oil seal 2 along the axial direction of the shaft 4 should be fitted against the partition 33, and the bottom surface should be fitted against the bottom surface of the second chamber 32. This arrangement allows for a tighter contact between the two oil seals and the connector 3 when they are in the first chamber 31 and the second chamber 32. Furthermore, the first oil seal 1 and the second oil seal 2 can be made of elastic material to provide better sealing through the compression of the connector 3 and the annular partition 33.
[0033] In one embodiment of this disclosure, see Figure 1 and Figure 2The connector 3 includes a cylindrical housing 35 and a cover plate 36. The cylindrical housing 35 allows for better machining and accommodates the first oil seal 1 and the second oil seal 2. An annular partition 33 is connected to the inner wall of the housing 35 to divide the inner cavity of the housing 35 into a first chamber 31 and a second chamber 32. When installing the connector 3, the first oil seal 1 can be installed first, followed by the connector 1 being installed onto the bearing seat 5, allowing the first oil seal 1 to enter the first chamber 31. Then, the second oil seal 2 is installed into the second chamber 32. Finally, the cover plate 36 seals the second chamber 32, completing the installation of the connector 3. Of course, in other embodiments, the connector 3 can have other structures, depending on the actual situation; this disclosure does not impose any limitations on this.
[0034] In one embodiment of this disclosure, see Figure 1 and Figure 2 During the installation of the second oil seal 2, the bottom surface of the second oil seal 2 along the axial direction of the rotating shaft 4 is fitted against the cover plate 36, and a silicone sealant is used to fix the connection between the cover plate 36 and the second oil seal 2. By using silicone sealant between the cover plate 36 and the second oil seal 2, the connection between the second oil seal 2 and the cover plate 36 can be made more stable, so that when the lubricating grease enters the second chamber 32, the second chamber 32 is kept sealed, and the cover plate 36 is prevented from falling off the housing 35 and causing the lubricating grease to seep out of the connector 3.
[0035] In one embodiment of this disclosure, see Figure 1 and Figure 2 The first oil seal 1 is annular, and a first fastening spring 11 is fitted onto its outer wall. The annular shape of the first oil seal 1 facilitates its mounting on the rotating shaft 4 and makes manufacturing easier. The first fastening spring 11 further secures the first oil seal 1 against the rotating shaft 4, increasing its sealing effect on the gap between the rotating shaft 4 and the bearing seat 5. Of course, in other embodiments, the first oil seal 1 can also be of other shapes, depending on the actual situation; this disclosure does not impose any limitations on this.
[0036] In one embodiment of this disclosure, see Figure 1 and Figure 2The second oil seal 2 includes an annular portion 21 and an extension portion 22. The annular portion 21 includes a first annular portion 211 that fits into the interior of the second chamber 32, and a second annular portion 212 located at the axial end of the first annular portion 211 and extending radially inward along the rotating shaft 4. The extension portion 22 is connected to the second annular portion 212 and extends radially upward along the rotating shaft 4 to abut against the rotating shaft 4. The structure of the second oil seal 2 allows the first annular portion 211, the second annular portion 212, the extension portion 22, and the annular partition 33 to form another sealed chamber in the second chamber 32 to store overflowing lubricating grease. Compared to the simple annular first oil seal 1, this structure can better improve the sealing effect of the second oil seal 2, preventing lubricating grease from flowing out of the second oil seal 2 to the outside, and it will not contact the cover plate 36 of the connecting member 3, preventing lubricating grease from flowing out from the cover plate 36.
[0037] In one embodiment of this disclosure, see Figure 1 and Figure 2 A blocking member 23 is also provided at the end of the extension 22 located at the second annular portion 212. By providing the blocking member 23, a placement groove 25 can be formed between the blocking member 23 and the extension 22. The placement groove 25 is an annular groove. A second fastening spring 24 is provided in the placement groove 25 to hold the extension 22 tightly on the rotating shaft 4, so as to prevent the extension 22 from having a gap with the rotating shaft 4 and causing the lubricating grease to leak out of the second oil seal 2 and contaminate the connector 3.
[0038] In one embodiment of this disclosure, see Figure 1 and Figure 2 A support ring 37 is also provided in the second chamber 32. One end of the support ring 37 is connected to the annular partition 33, and the other end extends axially along the rotating shaft 4, extending at most to abut against the second annular portion 212. The outer wall of the support ring 37 abuts against the interior of the first annular portion 211 in the second oil seal 2. By providing the support ring 37, the stability of the second oil seal 2 in the second chamber 32 can be ensured, so that the second oil seal 2 will not rotate synchronously with the rotating shaft 4 under the abutment of the support ring 37, thus affecting the sealing effect of the second oil seal 2.
[0039] In one embodiment of this disclosure, see Figure 1 and Figure 2The first oil seal 1 and the second oil seal 2 are made of fluororubber. Fluororubber has good high-temperature resistance and can work for a long time in an environment with a temperature of 200°C to 250°C, ensuring that the first oil seal 1 and the second oil seal 2 are not affected by the high temperature of the rotating shaft 4. It also has strong aging resistance, giving the first oil seal 1 and the second oil seal 2 a long service life. In addition, it has high chemical stability, ensuring that the first oil seal 1 and the second oil seal 2 are not corroded by lubricating grease. Of course, in other embodiments, the first oil seal 1 and the second oil seal 2 can also be made of other materials, depending on the actual situation. This disclosure does not limit this.
[0040] In one embodiment of this disclosure, see Figure 1 and Figure 2 The first oil seal 1, the second oil seal 2, and the connecting member 3 are all fixedly connected by a first part and a second part. The first part and the second part can be separated from the first oil seal 1, the second oil seal 2, and the connecting member 3 along the axis. This arrangement allows the bearing sealing structure of this disclosure to be installed directly in the middle section of the rotating shaft 4, without having to be installed from the end of the rotating shaft 4. On some already installed rotating shafts 4, the installation of the bearing sealing structure can be completed quickly without disassembly.
[0041] When grease leaks from the bearing housing 5, the lubricating grease is first blocked by the first oil seal 1, making it difficult for the lubricating grease to flow out from the gap between the rotating shaft 4 and the bearing housing 5. When too much lubricating grease exceeds the restriction of the first oil seal 1, it will enter the inner cavity formed by the first annular part 211, the second annular part 212, the extension part 22 and the annular partition 33 through the annular partition 33 for storage. When the cavity is full, the lubricating grease will also be blocked by the extension part 22 in the second oil seal 2 to prevent the lubricating grease from flowing out.
[0042] The bearing sealing structure disclosed herein, by providing two oil seals and a connector 3 for connecting the two oil seals, can prevent lubricating grease from seeping out of the sealing structure twice when lubricating grease leaks, thereby improving the sealing effect and preventing lubricating grease leakage. Furthermore, the first chamber 31 and the second chamber 32 in the connector 3 can also assist the first oil seal 1 and the second oil seal 2 in improving the sealing effect, further enhancing the sealing effect of the bearing sealing structure disclosed herein.
[0043] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.
[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0045] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A bearing sealing structure, wherein a rotating shaft is mounted on a bearing housing via a bearing and extends out of the bearing housing, characterized in that, The bearing sealing structure comprises: A first oil seal member is sleeved on the rotating shaft and abuts against the bottom surface of the bearing seat to seal the gap between the outer wall of the rotating shaft and the bearing seat; A second oil seal member is sleeved on the rotating shaft and is arranged in the axial direction of the rotating shaft and spaced from the first oil seal member; A connecting member is fixedly connected to the bottom surface of the bearing seat and is provided with a through hole through which the rotating shaft passes, and the connecting member is further provided with a first chamber and a second chamber spaced in the axial direction of the rotating shaft, the first oil seal member is located in the first chamber, and the second oil seal member is located in the second chamber.
2. The bearing seal structure of claim 1, wherein, The connecting member is provided with an annular partition plate for separating the first chamber and the second chamber, the top surface of the first oil seal member in the axial direction of the rotating shaft abuts against the bearing seat, and the bottom surface abuts against the annular partition plate, the top surface of the second oil seal member in the axial direction of the rotating shaft abuts against the annular partition plate, and the bottom surface abuts against the bottom surface of the second chamber in the axial direction.
3. The bearing seal structure of claim 2, wherein, The connecting member comprises a cylindrical shell and a cover plate, the shell is tubular, the annular partition plate is connected to the inner wall of the shell to separate the inner cavity of the shell into the first chamber and the second chamber, and the cover plate covers the end in the axial direction of the shell to close the second chamber.
4. The bearing seal structure of claim 3, wherein, The bottom surface of the second oil seal member in the axial direction of the rotating shaft abuts against the cover plate, and the cover plate and the second oil seal member are fixedly connected through silicone sealant.
5. The bearing seal structure of claim 1, wherein, The first oil seal member is annular, and the outer wall is sleeved with a first fastening spring.
6. The bearing seal structure of claim 1, wherein, The second oil seal member comprises an annular portion and an extension portion, the annular portion comprises a first annular portion abutting against the inner wall of the second chamber and a second annular portion extending radially inward from the axial end of the first annular portion towards the rotating shaft, the extension portion is connected with the second annular portion and extends obliquely upward in the radial direction of the rotating shaft to abut against the rotating shaft.
7. The bearing seal structure of claim 6, wherein, The extension portion is provided with a blocking piece at the end connected with the second annular portion, and a placement groove for placing a second fastening spring is formed between the blocking piece and the extension portion.
8. The bearing seal structure of claim 6, wherein, The second chamber is further provided with a support ring, one end of the support ring is connected to the connecting member, the other end extends in the axial direction of the rotating shaft, and the support ring abuts against the inner wall of the second oil seal member.
9. The bearing seal structure of claim 1, wherein, The first oil seal member and the second oil seal member are made of fluororubber material.
10. The bearing seal structure of any of claims 1-9, wherein, The first oil seal member, the second oil seal member and the connecting member are fixedly connected by a first part and a second part which are symmetrical to each other.