Sealing structure

Abstract

The utility model relates to a sealing structure, and belongs to the technical field of sealing equipment. The sealing structure comprises a main body which is provided with a movable hole and is used for being movably connected with a movable part; the sealing ring is arranged in the movable hole, the sealing ring comprises an outer edge, an inner edge and a connecting part connected between the outer edge and the inner edge, the outer edge is in contact with the inner wall of the movable hole, and the connecting part is obliquely arranged in the radial direction of the sealing ring; the sealing ring can deform in the radial direction of the movable hole when being subjected to external force so that the inner edge can make contact with the movable piece and be sealed. According to the sealing structure, automatic compensation can be conducted in the radial direction of the movable hole through the sealing ring, so that the sealing performance between the sealing ring and the inner wall of the movable hole and the sealing performance between the sealing ring and the outer wall of the movable part are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of sealing equipment, and in particular to a sealing structure. Background Art

[0002] Seals are often used on industrial equipment to seal between various parts to avoid material leakage. For equipment that requires dynamic sealing, there will be relative movement between the moving parts and the housing. Even if a seal is set between the moving parts and the housing, the long-term relative movement will still cause the seal to fail in the form of wear, plastic deformation, etc. and fail to work properly, causing materials to leak easily from the seal failure position, which not only causes environmental pollution, but also causes material waste. Utility Model Content

[0003] The present application provides a sealing structure to solve the technical problem that the existing sealing structure is prone to sealing failure and material leakage after long-term use.

[0004] According to one aspect of the present application, a sealing structure is provided, comprising: a main body, provided with a movable hole for movably connecting with a movable part; a sealing ring, arranged in the movable hole, the sealing ring comprising an outer edge, an inner edge and a connecting portion connected between the outer edge and the inner edge, the outer edge contacts the inner wall of the movable hole, and the connecting portion is inclined along the radial direction of the sealing ring; the sealing ring is arranged to be deformed in the radial direction of the movable hole when subjected to external force so that the inner edge contacts and seals the movable part.

[0005] In some optional embodiments, the number of the sealing rings is at least two, at least two of the sealing rings are arranged in sequence along the axial direction, and adjacent sealing rings are arranged in back-to-back directions.

[0006] In some optional embodiments, the sealing ring has a first connecting surface and a second connecting surface, and the first connecting surface and the second connecting surface are respectively located at two ends of the sealing ring in the axial direction; the first connecting surfaces of adjacent sealing rings are in contact with each other, and / or the second connecting surfaces of adjacent sealing rings are in contact with each other.

[0007] In some optional embodiments, the first connecting surface is located on a side of the sealing ring close to the inner edge, and the second connecting surface is located on a side of the sealing ring close to the outer edge; the first connecting surface and the second connecting surface are both planes perpendicular to the axial direction.

[0008] In some optional embodiments, the width of the first connecting surface in the radial direction of the active hole is 0.01S-0.1S; and / or the width of the second connecting surface in the radial direction of the active hole is 0.01D-0.1D; and / or the thickness of the outer edge and / or the inner edge of the sealing ring in the axial direction of the active hole is 0.6H-0.7H; wherein S is the inner diameter of the sealing ring, D is the outer diameter of the sealing ring, and H is the size of the sealing ring in the axial direction.

[0009] In some optional embodiments, the sealing structure further includes a sealing member, which is disposed in the movable hole and arranged in sequence with the sealing ring in the axial direction, and the sealing member is used to seal between the inner wall of the movable hole and the movable member.

[0010] In some optional embodiments, the seal comprises a packing seal or a skeleton seal.

[0011] In some optional embodiments, the sealing structure further includes a fastening assembly, which is disposed on a side of the sealing ring away from the sealing member, and the fastening assembly is configured to apply force to the sealing ring to cause the sealing ring to deform in a radial direction of the movable hole.

[0012] In some optional embodiments, the main body is provided with an adjustment hole; the fastening assembly includes a pressure cover and an adjusting piece, the pressure cover is arranged along the axial direction on the side of the sealing ring away from the sealing piece, the pressure cover is provided with a connecting hole, the adjusting piece is passed through the connecting hole and is rotatably connected to the main body through the adjusting hole, and the adjusting piece is configured to be able to extend into or out of the adjusting hole when the pressure cover rotates to change the magnitude of the force applied by the pressure cover to the sealing ring.

[0013] In some optional embodiments, the sealing structure further includes a bearing assembly, wherein the bearing assembly is connected to the main body and is used for rotationally connecting with the movable part.

[0014] In summary, the sealing structure provided by the present application has at least the following beneficial effects:

[0015] The sealing structure provided by the present application includes a main body and a sealing ring, wherein the main body is provided with a movable hole for being movably connected with a movable part, and the sealing ring is arranged in the movable hole. When the movable part is movably connected with the main body, the sealing ring can seal between the movable part and the main body, thereby ensuring the sealing performance of the movable part when it moves relative to the main body. Furthermore, since the connecting portion connecting the inner edge and the outer edge is inclined along the radial direction of the sealing ring, when the sealing ring is installed, if an external force along the axial direction of the movable hole is applied to the sealing ring, the sealing ring can tend to deform in the radial direction of the movable hole, thereby making the outer edge and the inner edge of the sealing ring tightly abut against the inner wall of the movable hole and the outer wall of the movable part, respectively. Thus, even if the sealing ring is worn during the movement of the movable part relative to the main body, under the deformation trend of the above-mentioned sealing ring, the sealing ring can automatically compensate in the radial direction of the movable hole, thereby ensuring the sealing performance between the sealing ring and the inner wall of the movable hole and the outer wall of the movable part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic cross-sectional view of a sealing structure provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the front view structure of the sealing ring provided in an embodiment of the present application;

[0019] Figure 3 for Figure 2 AA surface cross-sectional structure diagram in;

[0020] Figure 4 for Figure 3 Dimensioned schematic diagram of the structure shown in .

[0021] The reference numerals are as follows:

[0022] 100. Sealing structure;

[0023] 10. Main body; 11. Activity hole; 12. Adjustment hole;

[0024] 20. Sealing ring; 21. Outer edge; 22. Inner edge; 23. First connecting surface; 24. Second connecting surface; 25. Connecting portion;

[0025] 30. Seals;

[0026] 40. Fastening assembly; 41. Gland; 42. Adjustment member; 43. Connection hole;

[0027] 50. bearing assembly; 51. outer bearing; 52. bearing positioning sleeve;

[0028] 200. Moving parts. DETAILED DESCRIPTION

[0029] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear to indicate the orientation or position relationship, unless otherwise specified, they are understood to be based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0030] In addition, if there is a feature defined as "first" or "second", it is only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Features defined as "first" or "second" may explicitly or implicitly include at least one of the defined features. If there is a description of "plurality", the general meaning is to include at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and so on should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection, it can be a direct connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] In the description of this specification, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0033] Figure 1 This is a schematic cross-sectional structural diagram of a sealing structure 100 provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the front view of the sealing ring 20 provided in an embodiment of the present application. Figure 3 for Figure 2 Schematic diagram of the AA surface section structure. Figure 4 for Figure 3 Dimensioned schematic diagram of the structure shown in .

[0034] Please refer to Figures 1 to 4 The sealing structure 100 provided in the embodiment of the present application includes a main body 10 and a sealing ring 20 .

[0035] The main body 10 is provided with a movable hole 11 for being movably connected with the movable member 200, that is, the movable member 200 can be movably connected with the main body 10 through the movable hole 11. For example, in the embodiment of the present application, the movable hole 11 can be a cylindrical through hole, and the movable member 200 can be a cylindrical structure adapted to the movable hole 11. The movable member 200 passes through the movable hole 11 and is configured to be able to perform telescopic movement along the axial direction of the movable hole 11 or to perform rotational movement with the center line of the movable hole 11 as the rotation axis.

[0036] The sealing ring 20 is arranged in the movable hole 11, and is used to seal between the main body 10 and the movable part 200. Specifically, the sealing ring 20 includes an outer edge 21, an inner edge 22, and a connecting portion 25 connected between the outer edge 21 and the inner edge 22, the outer edge 21 contacts the inner wall of the movable hole 11, and the connecting portion 25 is inclined along the radial direction of the sealing ring 20. Exemplarily, the sealing ring 20 can be set as a circular ring structure adapted to the movable hole 11 and the movable part 200, wherein the outer edge 21 of the sealing ring 20 refers to the portion away from the center of the circular ring structure, and in the embodiment of the present application, it can specifically refer to the surface of the outer peripheral side of the circular ring structure; the inner edge 22 of the sealing ring 20 refers to the portion close to the center of the circular ring structure, and in the embodiment of the present application, it can specifically refer to the surface of the inner peripheral side of the circular ring structure.

[0037] Of course, it can be understood that in other optional embodiments, the sealing ring 20, the movable hole 11 and the movable part 200 can also be set to other mutually adaptable structural forms, such as a rectangular structure, a triangular prism structure, etc.

[0038] The sealing ring 20 is configured to deform in the radial direction of the movable hole 11 when subjected to external force so that the inner edge 22 contacts and seals with the movable part 200. Specifically, when the movable part 200 is disposed in the movable hole 11 and the sealing ring 20 is disposed between the movable part 200 and the movable hole 11, since the connecting portion 25 between the inner edge 22 and the outer edge 21 of the sealing ring 20 is inclined along the radial direction of the sealing ring 20, if the sealing ring 20 is subjected to an external force along the axial direction of the movable hole 11, it will deform and tend to press the movable part 200 along the radial direction of the movable hole 11, so that the inner edge 22 of the sealing ring 20 can fit tightly with the outer wall of the movable part 200, thereby sealing the movable part 200 and the movable hole 11.

[0039] Through the above structural design, the main body 10 is provided with an active hole 11 for active connection with the movable member 200, and the sealing ring 20 is arranged in the active hole 11. When the movable member 200 is movably connected with the main body 10, the sealing ring 20 can seal between the movable member 200 and the main body 10, thereby ensuring the sealing performance when the movable member 200 moves relative to the main body 10. In addition, since the connecting portion 25 connecting the outer edge 21 and the inner edge 22 is inclined along the radial direction of the sealing ring 20, when the sealing ring 20 is installed, if an external force along the axial direction of the active hole 11 is applied to the sealing ring 20, the sealing ring 20 tends to deform in the radial direction of the active hole 11, so that the outer edge 21 and the inner edge 22 of the sealing ring 20 are tightly abutted against the inner wall of the active hole 11 and the outer wall of the movable member 200, respectively. Therefore, even if the sealing ring 20 is worn during the movement of the movable part 200 relative to the main body 10, under the deformation trend of the above-mentioned sealing ring 20, the sealing ring 20 can automatically compensate in the radial direction of the movable hole 11 to ensure the sealing between the sealing ring 20 and the inner wall of the movable hole 11 and the outer wall of the movable part 200.

[0040] As a further preferred implementation scheme, based on the above scheme, the specific embodiments of the present application may also include one or more of the following additions or combinations.

[0041] In some optional embodiments, the number of the sealing rings 20 is at least two, and at least two sealing rings 20 are arranged in sequence along the axial direction, and adjacent sealing rings 20 are arranged in opposite directions. The back-to-back arrangement means that the inclination directions of adjacent sealing rings 20 are opposite. By providing at least two sealing rings 20, when all the sealing rings 20 are subjected to external force, they can be deformed in the radial direction of the movable hole 11 to closely abut against the outer wall of the movable part 200, so that each sealing ring 20 can form a seal, thereby improving the sealing effect.

[0042] In some embodiments, reference Figure 1 The sealing ring 20 can be made into a disc-shaped ring structure, and three sealing rings 20 are assembled together and adjacent sealing rings 20 are arranged in a back-to-back manner. When force is applied to the sealing ring 20 along the axial direction of the movable hole 11, the three sealing rings 20 will be squeezed against each other, and the three sealing rings 20 can be deformed in the radial direction of the movable hole 11 and closely abut against the outer wall of the movable part 200, thereby forming three seals.

[0043] It should be understood that in other optional embodiments, the number of sealing rings 20 is not limited to the above examples. For example, the number of sealing rings 20 can also be one, two, four, five, etc.

[0044] Further, in some optional embodiments, the material of the sealing ring 20 can be made of polytetrafluoroethylene and other materials, so that the sealing ring 20 has excellent elasticity, chemical stability, corrosion resistance, high and low temperature resistance, sealing, high lubrication, anti-aging, high strength and other characteristics, so as to improve the sealing effect. Exemplarily, the sealing structure 100 provided in the embodiment of the present application can be applied to the production process of ultrafine powders such as iron phosphate, based on the sealing ring 20 having good wear resistance and stability, and stable operation and normal operation in a working environment below 200°C, with good sealing and lubrication performance, which is conducive to greatly extending the operating life of the sealing structure 100.

[0045] In order to improve the performance of the sealing ring 20 , the specific structure of the sealing ring 20 may also be optimized.

[0046] In some optional embodiments, the sealing ring 20 has a first connection surface 23 and a second connection surface 24, and the first connection surface 23 and the second connection surface 24 are respectively located at the two ends of the sealing ring 20 in the axial direction; the first connection surfaces 23 of adjacent sealing rings 20 are in contact with each other, and / or the second connection surfaces 24 of adjacent sealing rings 20 are in contact with each other. By respectively arranging the first connection surface 23 and the second connection surface 24 at the two ends of the axial direction of the sealing ring 20, when a plurality of sealing rings 20 are sequentially arranged in the movable hole 11, the first connection surfaces 23 or the first connection surfaces 23 of adjacent sealing rings 20 will contact each other. Therefore, when an external force is applied to a sealing ring 20 along the axial direction of the movable hole 11, the external force will be transmitted to the adjacent sealing ring 20 at the first connection surface 23 or the second connection surface 24, so that all the sealing rings 20 can be subjected to a relatively stable external force and deform, thereby smoothly realizing the function of multi-pass sealing.

[0047] Further, in some optional embodiments, the first connecting surface 23 is located on the side of the sealing ring 20 close to the inner edge 22, and the second connecting surface 24 is located on the side of the sealing ring 20 close to the outer edge 21; the first connecting surface 23 and the second connecting surface 24 are both planes perpendicular to the axial direction.

[0048] Reference Figures 1 to 3 The first connection surface 23 is arranged near the outer periphery of the sealing ring 20 and is arranged as an annular plane, the second connection surface 24 is arranged near the center of the sealing ring 20 and is arranged as an annular plane, and the inner diameter of the first connection surface 23 is greater than the outer diameter of the second connection surface 24. When multiple sealing rings 20 are arranged in the movable hole 11, the first connection surfaces 23 or the second connection surfaces 24 of adjacent sealing rings 20 are against each other. At this time, since the first connection surface 23 and the second connection surface 24 are both annular planes, it is conducive to the smooth transmission of external forces between adjacent sealing rings 20, so that all sealing rings 20 can be subjected to external forces and deformed along the radial direction of the movable hole 11 to achieve the sealing function.

[0049] In addition, the shape and size of the sealing ring 20 can also be optimized. For ease of understanding, the shape and size of the sealing ring 20 are exemplarily introduced in the following embodiments in conjunction with the accompanying drawings.

[0050] Specifically, refer to Figure 4 , wherein the X direction is the axial direction of the movable hole 11, the Y direction is the radial direction of the movable hole 11, S is the inner diameter of the sealing ring 20, D is the outer diameter of the sealing ring 20, and H is the axial size of the sealing ring 20.

[0051] In some optional embodiments, the width W1 of the first connecting surface 23 in the radial direction of the active hole 11 is 0.01S-0.1S. For example, the width W1 of the first connecting surface 23 in the radial direction of the active hole 11 can be 0.01S, 0.02S, 0.03S, 0.04S, 0.05S, 0.06S, 0.07S, 0.08S, 0.09S, 0.10S or any value between 0.01S-0.10S.

[0052] In some optional embodiments, the width W2 of the second connecting surface 24 in the radial direction of the active hole 11 is 0.01D-0.1D. For example, the width W2 of the second connecting surface 24 in the radial direction of the active hole 11 can be 0.01D, 0.02D, 0.03D, 0.04D, 0.05D, 0.06D, 0.07D, 0.08D, 0.09D, 0.10D or any value between 0.01D-0.10D.

[0053] In some optional embodiments, the thickness W3 of the outer edge 21 and / or the inner edge 22 of the sealing ring 20 in the axial direction of the active hole 11 is 0.6H-0.7H. Exemplarily, the thickness of the outer edge 21 and the inner edge 22 of the sealing ring 20 in the axial direction of the active hole 11 can be selected from 0.60H, 0.61H, 0.618H, 0.62H, 0.63H, 0.64H, 0.65H, 0.66H, 0.67H, 0.68H, 0.69H, 0.70H or any value between 0.60H-0.70H. In addition, the thickness of the outer edge 21 of the sealing ring 20 in the axial direction of the active hole 11 is preferably equal to the thickness of the inner edge 22 of the sealing ring 20 in the axial direction of the active hole 11, so as to facilitate a more uniform deformation of the sealing ring 20, thereby improving the sealing effect.

[0054] Based on the optimized design in the above embodiment, by controlling at least one of the width W1 of the first connection surface 23 in the radial direction of the movable hole 11, the width W2 of the second connection surface 24 in the radial direction of the movable hole 11, and the thickness W3 of the outer edge 21 and / or the inner edge 22 of the sealing ring 20 in the axial direction of the movable hole 11 within a suitable range, the sealing ring 20 can meet the requirements of the sealing function in terms of size and have overall coordination in structure. Specifically, at this time, there is a certain contact area between adjacent sealing rings 20 and between the sealing ring 20 and the inner wall of the movable hole 11 and the outer wall of the movable part 200, which is conducive to the transmission of force between adjacent sealing rings 20, and at the same time, it is conducive to the contact and sealing between the outer edge 21 of the sealing ring 20 and the inner wall of the movable hole 11, and the contact and sealing between the inner edge 22 of the sealing ring 20 and the outer wall of the movable part 200.

[0055] In order to further improve the sealing performance of the sealing structure 100 , in addition to the sealing ring 20 , other sealing components may be provided.

[0056] In some optional embodiments, the sealing structure 100 further includes a sealing member 30, which is disposed in the movable hole 11 and is sequentially disposed with the sealing ring 20 in the axial direction, and the sealing member 30 is used to seal between the inner wall of the movable hole 11 and the movable member 200. By arranging the sealing member 30 to cooperate with the sealing ring 20, it is beneficial to further improve the sealing performance between the main body 10 and the movable member 200.

[0057] Reference Figure 1 , the movable hole 11 of the main body 10 can be a stepped hole, so that one side of the seal 30 abuts against the main body 10, and the other side abuts against the sealing ring 20. Among them, the seal 30 can be set as an annular structure adapted to the sealing ring 20. Therefore, when the sealing ring 20 receives an external force along the axial direction of the movable hole 11, the sealing ring 20 will squeeze the seal 30 from the side of the seal 30. At this time, the seal 30 can be subjected to force more evenly at various places, and the seal 30 can be automatically compressed by the sealing ring 20, so that the installation position of the seal 30 is fixed and reliable, which is conducive to improving the sealing performance and extending the service life of the seal 30.

[0058] In some optional embodiments, the seal 30 includes a packing seal or a skeleton seal to facilitate the sealing function.

[0059] In some optional embodiments, the sealing structure 100 further includes a fastening assembly 40, which is disposed on a side of the sealing ring 20 away from the sealing member 30, and the fastening assembly 40 is configured to apply force to the sealing ring 20 so that the sealing ring 20 is deformed in the radial direction of the active hole 11. The fastening assembly 40 can apply an external force along the axial direction of the active hole 11 to the sealing ring 20, so that the sealing ring 20 tends to deform in the radial direction of the active hole 11 to achieve a sealing function. Furthermore, when the movable part 200 moves in the movable hole 11 and causes the sealing ring 20 and the sealing member 30 to wear, a tiny gap may appear between the sealing ring 20, the sealing member 30 and the movable part 200 in the radial direction of the movable hole 11, thereby affecting the sealing performance. At this time, the fastening assembly 40 can continue to apply an external force along the axial direction of the movable hole 11 to the sealing ring 20, so that the sealing ring 20 is further deformed and fits tightly with the outer wall of the movable part 200. At the same time, the sealing ring 20 squeezes the sealing member 30 so that the sealing member 30 can also fit tightly with the outer wall of the movable part 200, thereby forming a continuous, stable and effective seal.

[0060] Reference Figure 1In some optional embodiments, an adjustment hole 12 is provided on the main body 10; the fastening assembly 40 includes a gland 41 and an adjustment member 42, the gland 41 is axially arranged on the side of the sealing ring 20 away from the sealing member 30, and a connecting hole 43 is provided on the gland 41. The adjustment member 42 is passed through the connecting hole 43 and is rotatably connected to the main body 10 through the adjustment hole 12. The adjustment member 42 is configured to be able to extend into or out of the adjustment hole 12 when it rotates so as to change the magnitude of the force applied by the gland 41 to the sealing ring 20.

[0061] Exemplarily, the adjustment hole 12 can be a cylindrical threaded hole, the connecting hole 43 can also be a cylindrical threaded hole, and the adjustment member 42 can be a bolt-like structure. By passing the adjustment member 42 through the connecting hole 43 and the adjustment hole 12 in sequence and rotating the adjustment member 42, the tightness between the pressure cover 41 and the main body 10 can be adjusted, thereby achieving the adjustment of the force applied to the sealing ring 20.

[0062] Specifically, when the gland 41 and the main body 10 are tightened by the adjusting member 42, the multiple sealing rings 20 will squeeze each other and form a pressing force on the sealing member 30 along the axial direction of the movable hole 11, so that the sealing rings 20 and the sealing member 30 form an effective filling between the movable member 200 and the main body 10. Even if the sealing rings 20 and the sealing member 30 are worn and deformed during operation, under the action of the squeezing force from the gland 41 on the sealing ring 20, the sealing ring 20 and the sealing member 30 can automatically compensate for the wear and continue to play a sealing role. In this way, the sealing ring 20 and the sealing member 30 can form two seals, making the operation of the sealing structure 100 more stable and reliable, and the service life is greatly extended. When the sealing ring 20 and the sealing member 30 are worn to a certain extent and the deformation of the sealing ring 20 is insufficient, it is only necessary to tighten the adjusting member 42 online for a few turns so that the gland 41 can re-apply force to the sealing ring 20 along the axial direction of the movable hole 11, so that the sealing effect can continue to be played.

[0063] In some optional embodiments, the sealing structure 100 further includes a bearing assembly 50 , which is connected to the main body 10 and is used for rotationally connecting with the movable part 200 .

[0064] For example, refer to Figure 1 The bearing assembly 50 may include an outer bearing 51 and a bearing positioning sleeve 52. The outer bearing 51 is used to be sleeved outside the movable part 200 and connected to the main body 10. The bearing positioning sleeve 52 is connected to the outer bearing 51 and is used to cooperate with the movable part 200 to install and position the outer bearing 51. The movable part 200 can be connected to the main body 10 through the bearing assembly 50, and the movable part 200 can be effectively sealed with the main body 10 during rotation through the sealing ring 20 and the sealing member 30.

[0065] In some optional embodiments, the sealing structure 100 of the embodiment of the present application can be used in the production process of ultra-fine powder materials such as iron phosphate. Specifically, the conveying equipment, rotating equipment, etc. involved in each process of the production line of ultra-fine powder materials such as iron phosphate are prone to failure of shaft seal and leakage. The main reason is that traditional sealing forms such as packing seals, skeleton seals, rubber ring seals, etc. will not work normally due to failure forms such as wear and plastic deformation during use, resulting in ultra-fine powder materials leaking from the shaft seal failure position, which not only causes environmental pollution, but also is a huge waste of material economy. The use of the sealing structure 100 of the embodiment of the present application can effectively solve the problem of axial seal failure and material leakage in the production of powder materials, with a long service life, stable operation, and good sealing effect. Even if leakage occurs, force can be applied to the sealing ring 20 to adjust the degree of deformation of the sealing ring 20 along the radial direction of the movable hole 11 to achieve re-sealing, thereby quickly eliminating the fault.

[0066] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A sealing structure, characterized in that: include: The main body is provided with a movable hole for being movably connected with the movable part; A sealing ring is arranged in the movable hole, the sealing ring comprises an outer edge, an inner edge and a connecting portion connected between the outer edge and the inner edge, the outer edge contacts the inner wall of the movable hole, and the connecting portion is arranged obliquely along the radial direction of the sealing ring; The sealing ring is configured to deform in the radial direction of the movable hole when subjected to external force so that the inner edge contacts and seals the movable part.

2. The sealing structure according to claim 1, characterized in that: The number of the sealing rings is at least two, and at least two of the sealing rings are arranged in sequence along the axial direction of the movable hole, and adjacent sealing rings are arranged in back-to-back directions.

3. The sealing structure according to claim 2, characterized in that: The sealing ring has a first connecting surface and a second connecting surface, and the first connecting surface and the second connecting surface are respectively located at two ends of the sealing ring in the axial direction; The first connecting surfaces of adjacent sealing rings are in contact with each other, and / or the second connecting surfaces of adjacent sealing rings are in contact with each other.

4. The sealing structure according to claim 3, characterized in that: The first connection surface is located on a side of the sealing ring close to the inner edge, and the second connection surface is located on a side of the sealing ring close to the outer edge; The first connecting surface and the second connecting surface are both planes perpendicular to the axial direction.

5. The sealing structure according to claim 3, characterized in that: The width of the first connecting surface in the radial direction of the active hole is 0.01S-0.1S; and / or The width of the second connecting surface in the radial direction of the active hole is 0.01D-0.1D; and / or The thickness of the outer edge and / or the inner edge of the sealing ring in the axial direction of the movable hole is 0.6H-0.7H; Wherein, S is the inner diameter of the sealing ring, D is the outer diameter of the sealing ring, and H is the dimension of the sealing ring in the axial direction.

6. The sealing structure according to any one of claims 1 to 5, characterized in that: The sealing structure further comprises a sealing member, which is arranged in the movable hole and arranged in sequence with the sealing ring in the axial direction of the movable hole, and the sealing member is used to seal between the inner wall of the movable hole and the movable member.

7. The sealing structure according to claim 6, characterized in that: The sealing element comprises a packing seal or a skeleton seal.

8. The sealing structure according to claim 6, characterized in that: The sealing structure further comprises a fastening assembly, wherein the fastening assembly is arranged on a side of the sealing ring away from the sealing member, and the fastening assembly is configured to apply force to the sealing ring to cause the sealing ring to deform in a radial direction of the movable hole.

9. The sealing structure according to claim 8, characterized in that: The main body is provided with an adjustment hole; The fastening assembly includes a pressure cover and an adjusting member, wherein the pressure cover is arranged along the axial direction on a side of the sealing ring away from the sealing member, and a connecting hole is provided on the pressure cover. The adjusting member is passed through the connecting hole and is rotatably connected to the main body through the adjusting hole. The adjusting member is arranged to be able to extend into or out of the adjusting hole when rotating to change the magnitude of the force applied by the pressure cover to the sealing ring.

10. The sealing structure according to claim 1, characterized in that: The sealing structure further comprises a bearing assembly, which is connected to the main body and is used for rotationally connecting with the movable part.

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