Bearing sealing structure

Abstract

The utility model belongs to the technical field of bearing sealing, and discloses a bearing sealing structure. An inner ring of the bearing sleeves the rotating shaft, the bearing seat forms a containing cavity, the rotating shaft penetrates through the bearing seat, and the bearing is arranged in the containing cavity. The sealing piece comprises a sleeving part, a labyrinth part and a splash-proof part, the rotating shaft is sleeved with the sleeving part, the labyrinth part and the splash-proof part both extend outwards in the radial direction of the sleeving part, and the top of the labyrinth part corresponds to the bearing seat and is arranged at an interval, so that it can be guaranteed that lubricating oil cannot leak through a gap, and sealing between the bearing seat and the rotating shaft is achieved; the abrasion of the labyrinth part and the waste of energy caused by the mutual friction between the sealing element and the bearing seat during rotation can be avoided; the splash-proof part is located on the side, facing the interior of the containing cavity, of the labyrinth part, the radius of the splash-proof part is larger than that of the labyrinth part, lubricating oil can be prevented from splashing into a gap between the labyrinth part and the bearing seat when the rotating shaft and the bearing rotate, and the sealing performance of the bearing sealing structure is further guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing seal technical field especially relates to a bearing seal structure. BACKGROUND

[0002] In the working process of rotating machinery, a large amount of heat is generated by bearing rotation, in order to improve the service life of the bearing, the bearing needs to be cooled by lubricating oil, generally, a lubricating oil cavity needs to be arranged at the bearing position, which is used to collect lubricating oil and discharge the lubricating oil outside the machinery through an oil return pipe. It can be understood that sealing structures need to be arranged on both sides of the bearing cavity to prevent lubricating oil leakage.

[0003] The labyrinth seal is a common sealing structure, which realizes the sealing of fluid or gas through the tooth shape and gap of the labyrinth, plus high-pressure gas. Since the labyrinth seal is a non-contact sealing structure, in the case of small design space and high lubricating oil temperature, poor sealing may easily lead to oil leakage or seepage, thereby affecting the continuous operation of the machinery. Even safety hazards may occur.

[0004] Therefore, there is an urgent need for a bearing sealing structure to solve the above problems. SUMMARY

[0005] The utility model discloses a bearing sealing structure, compact structure, can be installed in smaller space, has good sealing, improves the sealing effect of bearing lubrication.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] A bearing sealing structure is provided, the inner ring of the bearing is sleeved on the rotating shaft, comprising:

[0008] A bearing seat is formed, the rotating shaft is arranged in the bearing seat, and the bearing is arranged in the accommodating cavity;

[0009] A sealing element is provided, which comprises a sleeving part, a labyrinth part and a splash-proof part, the sleeving part is sleeved on the rotating shaft, the labyrinth part and the splash-proof part are both extended radially outward along the sleeving part, the labyrinth part forms a labyrinth structure with the bearing seat in the radial direction of the sealing element, and the splash-proof part is connected to one end of the sleeving part in the accommodating cavity.

[0010] As an optional solution of the bearing sealing structure, the sealing element comprises a plurality of labyrinth parts, and the plurality of labyrinth parts are arranged at intervals.

[0011] As an optional solution of the bearing sealing structure, the bearing seat comprises a main body part and a sealing cover, the main body part forms the accommodating cavity, the sealing cover is sleeved on the rotating shaft and sealingly connected to one end of the main body part, and the labyrinth part is formed in sealing connection with the sealing cover in the radial direction of the sealing member.

[0012] As an optional solution of the bearing sealing structure, the sealing member comprises a plurality of the labyrinth parts, the sealing cover is provided with an annular groove and a first channel, the annular groove is arranged towards the sealing member and is correspondingly arranged between any two of the labyrinth parts, and the first channel is communicated between the annular groove and an external air supply device.

[0013] As an optional solution of the bearing sealing structure, at least two of the labyrinth parts are arranged on both sides of the annular groove in the axial direction of the sealing member.

[0014] As an optional solution of the bearing sealing structure, the main body part is further provided with a second channel, and the second channel is communicated between the first channel and the air supply device.

[0015] As an optional solution of the bearing sealing structure, the sealing cover is further provided with a third channel, and the third channel is communicated between the annular groove and the accommodating cavity.

[0016] As an optional solution of the bearing sealing structure, a plurality of the third channels are arranged, and the plurality of the third channels are uniformly distributed in the circumferential direction of the sealing cover.

[0017] As an optional solution of the bearing sealing structure, the bearing seat further comprises a sealing ring, and the sealing ring is sealingly connected between the main body part and the sealing cover.

[0018] As an optional solution of the bearing sealing structure, the main body part and the sealing cover are connected by bolts.

[0019] The bearing sealing structure has the following beneficial effects:

[0020] The bearing sealing structure has the following beneficial effects: The bearing sleeve is arranged on the rotating shaft and in the bearing seat, the sealing member can rotate with the rotating shaft, the sleeve part of the sealing member is sleeved on the rotating shaft, the labyrinth part is connected to the sleeve part and extends outward in the radial direction of the sleeve part, the top of the labyrinth part is correspondingly and spacedly arranged on the bearing seat, the lubricating oil cannot leak through the gap, the sealing between the bearing seat and the rotating shaft is realized, the mutual friction between the sealing member and the bearing seat during rotation is avoided, the wear of the labyrinth part and the waste of energy are avoided, the splash-proof part is arranged on the side of the labyrinth part towards the inside of the accommodating cavity, the radius of the splash-proof part is greater than the radius of the labyrinth part, the lubricating oil splashed during the rotation of the rotating shaft and the bearing is prevented from entering the gap between the labyrinth part and the bearing seat, and the sealing property of the bearing sealing structure is further ensured.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is an assembly schematic view of the bearing sealing structure and the rotating shaft provided by the utility model;

[0022] Fig. 2 is an assembly schematic view of the sealing piece and the sealing cover of the bearing sealing structure provided by the utility model.

[0023] In the drawings:

[0024] 100, rotating shaft;

[0025] 200, bearing seat; 210, accommodating cavity; 220, main body part; 221, second channel; 230, sealing cover; 231, annular groove; 232, first channel; 233, third channel; 240, sealing ring.

[0026] 300, sealing piece; 310, sleeving part; 320, grate part; 330, splash-proof part;

[0027] 400, bolt. DETAILED DESCRIPTION

[0028] The utility model will be further explained in detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all structures.

[0029] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature is in second feature "on", "above" and "upper surface" includes that first feature is in second feature directly above and obliquely above, or only indicates that first feature horizontal height is higher than second feature. First feature is in second feature "under", "below" and "under" includes that first feature is in second feature directly below and obliquely below, or only indicates that first feature horizontal height is less than second feature.

[0031] In the description of the embodiment, the terms "upper", "lower", "right", "left", "horizontal", "vertical", and "radial" refer to the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0032] As shown in Figs. 1-2 The bearing sealing structure of the embodiment includes a bearing seat 200 and a sealing piece 300, the inner ring of the bearing is sleeved on the rotating shaft 100, the bearing seat 200 forms a containing cavity 210, the rotating shaft 100 is arranged in the bearing seat 200, and the bearing is arranged in the containing cavity 210. The sealing piece 300 includes a sleeving part 310, a labyrinth part 320 and a splash-proof part 330, the sleeving part 310 is sleeved on the rotating shaft 100, the labyrinth part 320 and the splash-proof part 330 both extend radially outward along the sleeving part 310, the labyrinth part 320 forms a labyrinth structure with the bearing seat 200 in the radial direction of the sealing piece 300, the splash-proof part 330 is connected to one end of the sleeving part 310 in the containing cavity 210, and the radius of the splash-proof part 330 is greater than the radius of the labyrinth part 320.

[0033] Based on the above design, the bearing sleeve is arranged on the rotating shaft 100 and in the bearing seat 200, the sleeve part 310 of the sealing element 300 is sleeved on the rotating shaft 100, so that the sealing element 300 can rotate with the rotating shaft 100, the grate part 320 is connected to the sleeve part 310 and extends outward along the radial direction of the sleeve part 310, the top of the grate part 320 is correspondingly and spacedly arranged with the bearing seat 200, which can not only ensure that the lubricating oil cannot leak through the gap to realize the sealing between the bearing seat 200 and the rotating shaft 100, but also can avoid the mutual friction between the sealing element 300 and the bearing seat 200 during rotation, thereby avoiding the wear of the grate part 320 and the waste of energy. The splash-proof part 330 is located on the side of the grate part 320 facing the inside of the accommodating cavity 210, and the radius of the splash-proof part 330 is greater than that of the grate part 320, which can block the lubricating oil from splashing into the gap between the grate part 320 and the bearing seat 200 during the rotation of the rotating shaft 100 and the bearing, thereby further ensuring the sealing performance of the bearing sealing structure. The bearing sealing structure has good sealing performance, simple and compact structure, and can be installed in a smaller space, which is conducive to improving the service life of the bearing.

[0034] Optionally, the sealing element 300 comprises a plurality of grate parts 320, the plurality of grate parts 320 are spacedly arranged, the plurality of grate parts 320 can form a plurality of gaps with the bearing seat 200, thereby further improving the sealing performance of the sealing element 300, and a storage cavity can be formed between adjacent two grate parts 320, so that when a small amount of lubricating oil passes through the gap between the grate part 320 and the bearing seat 200, the lubricating oil can be stored in the storage cavity to prevent the leakage of the lubricating oil.

[0035] Further, the bearing seat 200 comprises a main body part 220 and a sealing cover 230, the main body part 220 forms the accommodating cavity 210, the sealing cover 230 is sleeved on the rotating shaft 100 and sealingly connected to one end of the main body part 220, and the grate part 320 forms a sealing structure with the sealing cover 230 in the radial direction of the sealing element 300. The bearing seat 200 is arranged in a split structure, so that the installation position and sequence of the main body part 220 and the sealing cover 230 can be flexibly adjusted, the bearing can be in a good installation position in the accommodating cavity 210, the bearing can be well lubricated, and the grate part 320 and the sealing cover 230 can be correspondingly installed to ensure the sealing effect of the sealing element 300.

[0036] Optionally, the bearing seat 200 further comprises a sealing ring 240, which is sealingly connected between the main body 220 and the sealing cover 230. For example, a sealing groove can be arranged on one side of the main body 220 facing the sealing cover 230, or a sealing groove can be arranged on one side of the sealing cover 230 facing the main body 220, and the sealing ring 240 can be compressed in the sealing groove to facilitate positioning and installation of the sealing ring 240, and to reduce the degree of deformation of the sealing ring 240, thereby improving the service life of the sealing ring 240 while ensuring the sealing effect.

[0037] In the present embodiment, the main body 220 and the sealing cover 230 are connected by bolts 400, and the plurality of bolts 400 are uniformly distributed in the circumferential direction of the sealing cover 230, which is simple in structure and convenient to install. Of course, the main body 220 and the sealing cover 230 can also be connected by riveting, clamping or other methods, which will not be described here.

[0038] Further, the sealing member 300 comprises a plurality of grate portions 320, the sealing cover 230 is provided with an annular groove 231 and a first channel 232, the annular groove 231 is arranged towards the sealing member 300 and is correspondingly arranged between any two grate portions 320, and the first channel 232 is connected to the annular groove 231 and an external gas supply device. The external gas supply device can provide high-pressure gas, the high-pressure gas enters the annular groove 231 through the first channel 232, a part of the high-pressure gas flows towards the accommodating cavity 210 through the grate portion 320, reducing the flow of lubricating oil and lubricating oil vapor into the annular groove 231; another part of the high-pressure gas flows away from the accommodating cavity 210, preventing external foreign matter from entering and ensuring the cleanliness of the sealing member 300, which is conducive to improving the sealing effect.

[0039] Optionally, at least two grate portions 320 are arranged on both sides of the annular groove 231 in the axial direction of the sealing member 300, further improving the sealing performance of the sealing structure.

[0040] Further, the main body 220 is further provided with a second channel 221, the second channel 221 is connected between the first channel 232 and the gas supply device, and the high-pressure gas enters the annular groove 231 through the second channel 221 and the first channel 232 in sequence, which facilitates adjustment of the position of the air inlet on the bearing sealing structure and facilitates connection and layout of multiple devices.

[0041] In use, since the grate teeth 320 cannot completely seal the lubricating oil or lubricating oil vapor in the accommodating cavity 210, lubricating oil or lubricating oil vapor is continuously accumulated in the annular groove 231, and when accumulated to a certain degree, high-pressure gas blows the accumulated lubricating oil or lubricating oil vapor out of the sealing cover 230, causing lubricating oil leakage. Therefore, the sealing cover 230 is also provided with a third channel 233, which is communicated between the annular groove 231 and the accommodating cavity 210. Under the blowing of high-pressure gas, the lubricating oil or lubricating oil vapor leaked into the annular groove 231 is blown back into the accommodating cavity 210, avoiding lubricating oil leakage.

[0042] Optionally, a plurality of third channels 233 are arranged, and the plurality of third channels 233 are uniformly distributed in the circumferential direction of the sealing cover 230, so as to ensure that the lubricating oil can be discharged in time and further avoid lubricating oil leakage.

[0043] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or modifications can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A bearing seal structure, an inner ring of a bearing being fitted on a rotating shaft (100), characterized by, The application relates to a bearing seat (200) and a sealing element (300) thereof. The bearing seat (200) forms a containing cavity (210), the rotating shaft (100) is arranged in the bearing seat (200), and the bearing is arranged in the containing cavity (210). The sealing element (300) comprises a sleeving part (310), a grate part (320) and a splash-proof part (330), the sleeving part (310) is sleeved on the rotating shaft (100), the grate part (320) and the splash-proof part (330) are both extended radially outward along the sleeving part (310), the grate part (320) forms a labyrinth structure with the bearing seat (200) in the radial direction of the sealing element (300), and the splash-proof part (330) is connected to one end of the sleeving part (310) in the containing cavity (210), and the radius of the splash-proof part (330) is greater than that of the grate part (320).

2. The bearing seal structure of claim 1, wherein, The sealing element (300) comprises a plurality of grate parts (320), and the plurality of grate parts (320) are arranged at intervals.

3. The bearing seal structure of claim 1, wherein, The bearing seat (200) comprises a main body part (220) and a sealing cover (230), the main body part (220) forms the containing cavity (210), the sealing cover (230) is sleeved on the rotating shaft (100) and is sealingly connected to one end of the main body part (220), and the grate part (320) forms a sealing structure with the sealing cover (230) in the radial direction of the sealing element (300).

4. The bearing seal structure of claim 3, wherein, The sealing element (300) comprises a plurality of grate parts (320), the sealing cover (230) is provided with an annular groove (231) and a first channel (232), the annular groove (231) is arranged towards the sealing element (300) and is arranged correspondingly between any two grate parts (320), and the first channel (232) is communicated with the annular groove (231) and an external gas supply device.

5. The bearing seal structure of claim 4, wherein, In the axial direction of the sealing element (300), at least two grate parts (320) are arranged on both sides of the annular groove (231).

6. The bearing seal structure of claim 4, wherein, The main body part (220) is further provided with a second channel (221), and the second channel (221) is communicated between the first channel (232) and the gas supply device.

7. The bearing seal structure of claim 6, wherein, The sealing cover (230) is further provided with a third channel (233), and the third channel (233) is communicated between the annular groove (231) and the containing cavity (210).

8. The bearing seal structure of claim 7, wherein, A plurality of third channels (233) are arranged, and the plurality of third channels (233) are uniformly distributed in the circumferential direction of the sealing cover (230).

9. The bearing seal structure of claim 3, wherein, The bearing seat (200) further comprises a sealing ring (240), and the sealing ring (240) is sealingly connected between the main body part (220) and the sealing cover (230).

10. The bearing seal structure of claim 3, wherein, The main body part (220) and the sealing cover (230) are connected through bolts (400).

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