Sealing structure for bearing seat of air compressor

Abstract

The utility model belongs to the technical field of air compressors, and particularly relates to a sealing structure for a bearing seat of an air compressor, which comprises a bearing seat main body, the shaft is arranged on the bearing seat main body and the bearing in a penetrating manner; the edge of the inner side surface of the annular sealing cover is provided with two circles of sealing rings which are concentric with the annular sealing cover; the first sealing piece comprises a plurality of sealing rings arranged between the annular sealing cover and the bearing seat main body; the second sealing piece is arranged between the annular sealing cover and the shaft; wherein the sealing rings are distributed in the axial direction of the annular sealing cover in a staggered mode and distributed in the radial direction of the annular sealing cover at intervals, sealing grooves matched with the sealing rings are formed in the edge of the side face of the bearing seat body, and compared with the prior art, the sealing performance of the air compressor bearing seat can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compressors, and in particular relates to a sealing structure for a bearing seat of an air compressor. Background Art

[0002] A bearing seat is a mechanical part used to support and mount bearings, usually in rotating mechanical devices. Its main function is to support the bearing and enable it to maintain a stable position during rotation, and to withstand the force from the bearing and the working load on the shaft. The air compressor also needs to install a bearing seat during use, such as a bearing seat sealing structure disclosed in the patent with application number CN202122247069.2, including a seat body; a main shaft, which has an interference fit with the inner side of the seat body; also includes an annular sealing cover, which has an interference fit with the main shaft, the annular sealing cover is sealed and fitted with the end face of the seat body, and the upper part of the annular sealing cover away from the end face of the seat body is concentrically provided with a plurality of flanges; an annular transparent cover, on which a plurality of grooves plug-in connected with the flanges are provided, and the plug-in connected grooves and flanges constitute a plurality of mutually connected labyrinth sealing structures, the annular transparent cover is sealed and fitted with the end face of the seat body, and is detachably connected to the seat body; an annular fixing ring, which has an interference fit with the main shaft, and the annular fixing ring is arranged at the lower part of the annular sealing cover away from the end face of the seat body; the annular sealing cover and the annular fixing ring are detachably connected to the seat body;

[0003] During use of the existing bearing seat sealing structure, the sealing performance between the sealing cover and the bearing seat is poor, and the seal between the sealing cover and the shaft is also prone to failure due to pressure, so it is necessary to make improvements. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing structure for an air compressor bearing seat in order to effectively improve the sealing performance of the air compressor bearing seat in view of the above-mentioned existing technical problems.

[0005] In view of this, the utility model provides a sealing structure for an air compressor bearing seat, comprising:

[0006] A bearing seat body, wherein a bearing is arranged in the bearing seat body;

[0007] A shaft, wherein the shaft passes through the bearing seat body and the bearing;

[0008] Also includes:

[0009] An annular sealing cover, wherein the edge of the inner side of the annular sealing cover is provided with two circles of sealing rings concentric with the annular sealing cover;

[0010] A first sealing member, the first sealing member comprising a plurality of sealing rings disposed between the annular sealing cover and the bearing seat body;

[0011] a second sealing member, the second sealing member being disposed between the annular sealing cover and the shaft;

[0012] Among them, a plurality of sealing rings are staggeredly distributed in the axial direction of the annular sealing cover and spaced apart in the radial direction of the annular sealing cover, and a sealing groove cooperating with the sealing ring is arranged on the edge of the side surface of the bearing seat body.

[0013] In the present technical solution, by setting the annular sealing protrusion on the annular sealing cover, the annular sealing protrusion and the sealing groove cooperate with each other to form a multi-pass seal, thereby improving the sealing performance between the annular sealing cover and the bearing seat body. At the same time, by the distribution design of several sealing rings of the first sealing member, the sealing performance between the annular sealing cover and the bearing seat body is further improved. The first seal and the second seal are integrated on the annular sealing cover, which can effectively facilitate the user to inspect and maintain the sealing structure and improve work efficiency.

[0014] In the above technical solution, further, there are at least three sealing rings, and the three sealing rings are staggeredly distributed in the axial direction of the annular sealing cover and spaced apart in the radial direction of the annular sealing cover.

[0015] In the above technical solution, further, the sealing ring also includes:

[0016] The deformation cavity is arranged in the sealing ring and extends along the circumference of the sealing ring. The cross section of the deformation cavity is semicircular, and the plane side of the deformation cavity is perpendicular to the sealing surface of the sealing ring.

[0017] In the above technical solution, further, the second sealing member also includes:

[0018] A sealing ring can be tightly attached to the cover under pressure.

[0019] In the above technical solution, further, the sealing ring also includes:

[0020] Active grooves, which are arranged on the side surfaces of the sealing ring, extend along the circumference of the sealing ring, and have an isosceles trapezoidal cross section;

[0021] A movable block, wherein the movable block is arranged in the movable groove and can move into the movable groove under the action of pressure;

[0022] An elastic sheet is arranged in the sealing ring and located inside the movable groove.

[0023] The beneficial effects of the utility model are:

[0024] 1. The provision of the annular sealing protrusion and the first sealing member can effectively improve the sealing performance between the annular sealing cover and the bearing seat. Meanwhile, the integration of the first sealing member and the second sealing member on the annular sealing cover can effectively facilitate the inspection and maintenance of the sealing structure, thereby improving work efficiency.

[0025] 2. The setting of the deformation groove enables the sealing ring to effectively form a sealing surface through deformation after the annular sealing cover is assembled, and the deformation groove only occupies half of the volume of the sealing ring, which ensures the structural strength of the sealing ring while improving the sealing performance and sealing stability of the sealing ring;

[0026] 3. Through the arrangement of the movable block and the movable groove, when the sealing ring is under pressure, the movable block moves into the movable groove to squeeze the sealing ring. Under the squeezing, the sealing ring can further adhere to the sealing cover to ensure the sealing effect, thereby effectively improving the sealing performance between the shaft and the annular sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 It is a schematic structural diagram of a specific implementation method of the utility model.

[0029] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the partial enlarged view of part A in the middle.

[0030] Figure 3 This is a schematic diagram of the sealing ring structure of the utility model.

[0031] Figure 4 This is a schematic diagram of the sealing ring structure of the utility model.

[0032] Figure 5 It is a schematic diagram of the cross-sectional structure of the sealing ring of the utility model.

[0033] The symbols in the figure are:

[0034] 1. Bearing seat body; 2. Bearing; 3. Shaft; 4. Annular sealing cover; 5. Annular sealing protrusion; 6. First sealing member; 7. Sealing ring; 8. Second sealing member; 9. Deformation cavity; 10. Sealing ring; 11. Movable groove; 12. Movable block; 13. Elastic sheet. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0037] Embodiment 1:

[0038] The embodiment of the present application provides a sealing structure for an air compressor bearing seat, comprising: a bearing seat body 1, in which a bearing 2 is arranged; a shaft 3, which passes through the bearing seat body 1 and the bearing 2;

[0039] The bearing housing also includes: an annular sealing cover 4, the inner side edge of which is provided with two sealing rings 10 concentric with the annular sealing cover 4; a first sealing member 6, which includes a plurality of sealing rings 7 provided between the annular sealing cover 4 and the bearing housing body 1; and a second sealing member 8, which is provided between the annular sealing cover 4 and the shaft 3;

[0040] Among them, a plurality of sealing rings 7 are staggeredly distributed upwardly from the axis 3 of the annular sealing cover 4 and are spaced apart in the radial direction of the annular sealing cover 4 , and a sealing groove cooperating with the sealing ring 10 is provided on the edge of the side surface of the bearing seat body 1 .

[0041] There are at least three sealing rings 7 , which are staggeredly distributed upwardly from the axis 3 of the annular sealing cover 4 and spaced apart in the radial direction of the annular sealing cover 4 .

[0042] Moreover, the annular sealing cover 4 is detachably mounted on the bearing seat body 1 by fixing bolts, and the inner side surface of the annular sealing cover 4 also has a support ring for supporting the bearing 2, and the axial length of the annular sealing protrusion 5 located on the outside in the axial direction 3 is greater than the axial length of the annular sealing protrusion 5 located on the inside in the axial direction 3.

[0043] In this embodiment, by setting the annular sealing protrusion 5 on the annular sealing cover 4, the annular sealing protrusion 5 and the sealing groove cooperate with each other to form a multi-pass seal, thereby improving the sealing performance between the annular sealing cover 4 and the bearing seat body 1. At the same time, by the distribution design of the plurality of sealing rings 7 of the first sealing member 6, the sealing performance between the annular sealing cover 4 and the bearing seat body 1 is further improved. The first sealing member 6 and the second sealing member 8 are integrated on the annular sealing cover 4, which can effectively facilitate the user to inspect and maintain the sealing structure, thereby improving work efficiency.

[0044] Embodiment 2:

[0045] The present embodiment provides a sealing structure for an air compressor bearing seat. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: the sealing ring 7 also includes: a deformation cavity 9, which is arranged in the sealing ring 7 and extends along the circumference of the sealing ring 7. The cross-section of the deformation cavity 9 is semicircular, and the plane side of the deformation cavity 9 is perpendicular to the sealing surface of the sealing ring 7.

[0046] In this embodiment, the deformation groove is provided so that the sealing ring 7 can effectively form a sealing surface through deformation after the annular sealing cover 4 is assembled. At the same time, the outward expansion range of the deformation is larger, which can further increase the sealing surface area, thereby further improving the sealing performance. In addition, the deformation groove only occupies half of the volume of the sealing ring 7, which improves the sealing performance and sealing stability of the sealing ring 7 while ensuring the structural strength of the sealing ring 7.

[0047] Embodiment 3:

[0048] The present embodiment provides a sealing structure for an air compressor bearing seat. In addition to the technical solutions of the above-mentioned embodiments, the sealing ring 10 also has the following technical features. The sealing ring 10 also includes: a movable groove 11, which is arranged on the side surfaces on both sides of the sealing ring 10, and the movable groove 11 extends along the circumference of the sealing ring 10. The cross-section of the movable groove 11 is an isosceles trapezoid; a movable block 12, which is arranged in the movable groove 11, and the movable block 12 can move into the movable groove 11 under the action of pressure; an elastic sheet 13, which is arranged in the sealing ring 10 and is located on the inner side of the movable groove 11.

[0049] Moreover, the center of the annular sealing cover 4 has a hole for the shaft 3 to pass through, and an annular groove is opened on the circumferential surface of the hole. The sealing ring 10 is fixedly installed in the above annular groove. The movable block 12 is annular and concentric with the sealing ring 10.

[0050] In the present embodiment, when the air pressure increases upwardly on the shaft 3, the side of the sealing ring 10 is compressed, and the movable block 12 moves into the movable groove 11 under the push of the pressure. Moreover, since the cross section of the movable groove 11 is an isosceles trapezoid, the movable block 12 will squeeze the movable groove 11 when moving into the movable groove 11. After the movable groove 11 is squeezed, the upper and lower sides of the sealing ring 10 expand outwardly, thereby further compressing the annular sealing cover 4, so that the sealing surface is always in a stable state, preventing the sealing surface from failing due to the increase in pressure, ensuring the sealing effect, and effectively improving the sealing performance between the shaft 3 and the annular sealing cover 4. At the same time, the elastic sheet 13 in the sealing ring 10 can effectively improve the structural strength of the sealing ring 10 and prevent the sealing ring 10 from being damaged.

[0051] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A sealing structure for an air compressor bearing seat, comprising: A bearing seat body (1), wherein a bearing (2) is arranged in the bearing seat body (1); A shaft (3), wherein the shaft (3) is passed through the bearing seat body (1) and the bearing (2); It is characterized by further comprising: An annular sealing cover (4), wherein the edge of the inner side of the annular sealing cover (4) is provided with two circles of annular sealing protrusions (5) concentric with the annular sealing cover (4); A first sealing member (6), the first sealing member (6) comprising a plurality of sealing rings (7) arranged between the annular sealing cover (4) and the bearing seat body (1); A second sealing member (8), the second sealing member (8) being arranged between the annular sealing cover (4) and the shaft (3); The first seal (6) and the second seal (8) are both arranged on the annular sealing cover (4), a plurality of sealing rings (7) are staggeredly distributed upwardly of the axis (3) of the annular sealing cover (4) and are spaced apart in the radial direction of the annular sealing cover (4), and a sealing groove cooperating with the annular sealing protrusion (5) is arranged on the edge of the side surface of the bearing seat body (1).

2. The sealing structure for an air compressor bearing seat according to claim 1, characterized in that: There are at least three sealing rings (7), which are staggeredly distributed upwardly of the axis (3) of the annular sealing cover (4) and spaced apart in the radial direction of the annular sealing cover (4).

3. The sealing structure for an air compressor bearing seat according to claim 2, characterized in that: The sealing ring (7) also includes: A deformation cavity (9), the deformation cavity (9) is arranged in the sealing ring (7) and extends along the circumference of the sealing ring (7), the cross section of the deformation cavity (9) is semicircular, and the plane side of the deformation cavity (9) is perpendicular to the sealing surface of the sealing ring (7).

4. The sealing structure for an air compressor bearing seat according to claim 1, characterized in that: The second sealing member (8) further comprises: A sealing ring (10) can be tightly attached to the cover under pressure.

5. The sealing structure for an air compressor bearing seat according to claim 4, characterized in that: The sealing ring (10) further comprises: A movable groove (11), the movable groove (11) being arranged on the side surfaces of both sides of the sealing ring (10), the movable groove (11) extending along the circumference of the sealing ring (10), and the cross section of the movable groove (11) being an isosceles trapezoid; A movable block (12), wherein the movable block (12) is arranged in the movable groove (11), and the movable block (12) can move into the movable groove (11) under the action of pressure; An elastic sheet (13) is arranged in the sealing ring (10) and is located on the inner side of the movable groove (11).

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