Sealing structure, water pump and air conditioner

Abstract

The utility model discloses a sealing structure, a water pump and an air conditioner, which comprises a cover body, a shell is inserted in the cover body, a sealing part is arranged between the shell and the cover body, the sealing part is sleeved on the periphery of the shell, and when the cover body is buckled on the shell, the sealing part is fixed on the cover body. The inner wall of the cover body extrudes the sealing part to realize radial sealing so as to ensure the sealing effect in the shell; by arranging the sealing part arranged on the periphery of the shell in a sleeving mode, when the cover body and the shell are assembled, the cover body extrudes the sealing part along the outer edge of the sealing part, radial compression on the sealing part is achieved, then the shell is stressed in the radial direction, and radial force at all positions in the circumferential direction of the shell counteracts mutually; compared with a structure that a cover body exerts axial pressure on the shell in the prior art, the requirement for the rigidity of the shell is low, meanwhile, the influence generated by deformation of the sealing part which is compressed in the radial direction has small buckling on the cover body and the shell in the axial direction, and the cover body and the shell are convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of water pump sealing technology, specifically to a sealing structure, a water pump, and an air conditioner. Background Technology

[0002] Currently, most water pumps on the market use a sealing method where the cover plate and stator housing are connected by bolts and sealed with an axial compression gasket or O-ring. This method has the following main problems:

[0003] 1. Inconvenient manual installation: The cover plate and stator housing are tightened by bolts and nuts to compress the sealing gasket or O-ring to achieve a seal. When tightening the bolts, it is necessary to overcome the reaction force when compressing the sealing gasket, and the torque requirement is large. In order to achieve an effective seal, the pump body usually uses more than six screws to tighten the cover plate for sealing. There are many bolts, and each bolt needs to be tightened crosswise, symmetrically, gradually and evenly, which takes a long time.

[0004] 2. High rigidity requirements for cover plate and stator housing: The sealing method is bolt tightening, and the cover plate and stator housing axially compress the sealing gasket to achieve the sealing requirements. The rigidity requirements of the cover plate and stator housing are relatively high. Metal housing is commonly used. If plastic housing is used, it will show insufficient strength and lead to sealing failure.

[0005] Therefore, the existing technology needs further improvement. Utility Model Content

[0006] To address the shortcomings of existing technologies, a sealing structure, water pump, and air conditioner are proposed, which solves the problems of inconvenient manual installation and high rigidity requirements for the cover plate and stator housing in existing technologies.

[0007] To achieve the above objectives, the present invention proposes the following technologies:

[0008] A sealing structure includes a cover body, a housing body inserted into the cover body, a sealing part provided between the housing body and the cover body, the sealing part being sleeved on the periphery of the housing body, and when the cover body is fastened onto the housing body, the inner wall of the cover body compresses the sealing part to achieve radial sealing, thereby ensuring the sealing effect inside the housing body.

[0009] Furthermore, the sealing part is located inside the sealing cavity, and the volume of the sealing cavity gradually decreases as the cover and the shell are fastened together, so as to compress the sealing part to achieve sealing of the inside of the shell.

[0010] Furthermore, the cover includes a cover edge, and the sealing cavity is located between the cover edge and the housing. The cover edge is annular and coaxially arranged with the housing to ensure uniform radial compression of the sealing part.

[0011] Furthermore, the sealing cavity includes a first compression groove formed in the circumference of the housing, and a sealing part is sleeved on the first compression groove and is interference-fitted with the sealing part to achieve pre-tight positioning of the sealing part for easy fastening of the cover.

[0012] Furthermore, the sealing cavity also includes a second compression groove formed on the inner wall of the cover edge. When the cover is fastened to the housing, the second compression groove approaches the first compression groove and forms a sealing cavity to compress the sealing part and achieve a seal on the inside of the housing.

[0013] Furthermore, the first compression groove includes a first compression surface for supporting the sealing portion, and the second compression groove includes a second compression surface that cooperates with the first compression surface for radially compressing the sealing portion, the second compression surface being disposed parallel to the first compression surface.

[0014] Furthermore, the first compression groove includes a first limiting surface for limiting the sealing part, and the second compression groove includes a second limiting surface disposed opposite to the first limiting surface. The sealing part is located between the first limiting surface and the second limiting surface to achieve positioning in the axial direction of the housing and ensure uniform compression of the sealing part.

[0015] Furthermore, a first guide surface is inclinedly provided on the inner wall edge of the cover, and a second guide surface matching the first guide surface is provided on the housing. When the cover and the housing are fastened together, the first guide surface compresses the sealing part and guides the sealing part into the sealing cavity for further compression to achieve sealing of the inside of the housing.

[0016] Furthermore, a limiting component is provided between the cover and the shell. The limiting component includes a boss on the cover and a groove on the shell. The boss is inserted into the groove to prevent the cover and the shell from rotating relative to each other.

[0017] Furthermore, it also includes a locking assembly, wherein the two ends of the housing are respectively open and connected to a cover, and the two covers are locked together by the locking assembly to be fixedly connected to the two ends of the housing and compress the sealing part, thereby achieving a seal on the inside of the housing.

[0018] Furthermore, the locking assembly includes bolts and nuts, and the cover has mounting holes for inserting bolts. The bolts pass through the mounting holes on both covers and are fastened by nuts. Several sets of bolts are evenly arranged along the circumference of the housing to stably connect the cover and the housing.

[0019] A water pump comprising a sealing structure as described in any of the preceding claims.

[0020] An air conditioner that includes the aforementioned water pump.

[0021] Compared with the prior art, the comprehensive effects brought about by this utility model include:

[0022] This application provides a sealing part that is sleeved around the periphery of the housing. When assembling the cover and the housing, the cover squeezes the sealing part along the outer edge of the sealing part, thereby achieving radial compression of the sealing part. This causes the housing to be subjected to radial force, and the radial forces at various points in the circumferential direction of the housing cancel each other out. Compared with the structure in the prior art where the cover applies axial pressure to the housing, the rigidity requirement of the housing is lower. At the same time, the effect of the deformation of the sealing part caused by radial compression has a smaller impact on the axial fastening of the cover and the housing, making it easier to install the cover and the housing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall internal structure of an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the sealing cavity structure according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the first guide surface structure according to an embodiment of the present utility model;

[0026] Figure 4 This is a cross-sectional schematic diagram of the cover structure according to an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the end structure of the cover body in an embodiment of the present utility model;

[0028] Figure 6 This is a schematic diagram of the external structure of the housing in an embodiment of the present utility model;

[0029] Figure 7 This is a schematic diagram of the end structure of the shell in an embodiment of the present utility model;

[0030] Figure 8 This is a schematic diagram of the water pump structure according to an embodiment of the present utility model;

[0031] Figure 9 This is a schematic diagram of the stress analysis of the sealing part in an embodiment of this utility model.

[0032] Legend: 1. Cover; 2. Shell; 3. Sealing part; 4. Sealing cavity; 5. Cover edge; 6. First compression groove; 7. Second compression groove; 8. First compression surface; 9. Second compression surface; 10. First limiting surface; 11. Second limiting surface; 12. First guide surface; 13. Second guide surface; 14. Boss; 15. Groove; 16. Bolt; 17. Nut; 18. Mounting hole; 19. Water pump. Detailed Implementation

[0033] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Terms such as "upper," "lower," "left," "right," and "top" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0035] like Figures 1 to 9 As shown, a sealing structure includes a cover 1, a housing 2 inserted inside the cover 1, a sealing part 3 provided between the housing 2 and the cover 1, the sealing part 3 being sleeved on the periphery of the housing 2, when the cover 1 is fastened onto the housing 2, the inner wall of the cover 1 presses against the sealing part 3 to achieve radial sealing and thus ensure the sealing effect inside the housing 2.

[0036] By setting a sealing part 3 around the outer periphery of the housing 2, when assembling the cover 1 and the housing 2, the cover 2 squeezes the sealing part 3 along the outer edge of the sealing part 3 to achieve radial compression of the sealing part 3, thereby causing the housing 2 to be subjected to radial force. The radial forces at various points in the circumference of the housing 2 cancel each other out. Compared with the structure in the prior art where the cover 1 applies axial pressure to the housing 2, the rigidity requirement of the housing 2 is lower. At the same time, the effect of the deformation of the sealing part 3 caused by radial compression has a smaller impact on the axial fastening of the cover 1 and the housing 2, making it easier to install the cover 1 and the housing 2.

[0037] In the sealing structure of this embodiment, the sealing part 3 is located inside the sealing cavity 4. The volume of the sealing cavity 4 gradually decreases as the cover 1 and the shell 2 are fastened together, so as to compress the sealing part 3 to seal the inside of the shell 2.

[0038] The sealing cavity 4 is set to limit the sealing part 3, ensuring that the sealing part 3 is located at the connection between the cover 1 and the shell 2 and is blocked at the connection to achieve a seal, thus ensuring the airtightness of the shell 2.

[0039] In the sealing structure of this embodiment, the cover 1 includes a cover edge 5, and the sealing cavity 4 is located between the cover edge 5 and the housing 2. The cover edge 5 is annular and coaxially arranged with the housing 2 to ensure uniform compression of the sealing part 3 in the radial direction.

[0040] Specifically, the shell 2 has a hollow cylindrical structure, the cover 1 matches the cross-sectional shape of the shell 2, the cover edge 5 has a circular structure and is fixed on the side of the cover 1 close to the shell 2, and after the cover 1 and the shell 2 are assembled, the cover edge 5 is fitted on the outside of the shell 2.

[0041] The inner diameter of the cover edge 5 is coaxial with the outer diameter of the housing 2, which makes it easy to set the sealing cavity 4 on the inner wall of the cover edge 5 so as to compress the sealing part 3 sleeved on the housing 2 from the radial direction, thereby avoiding axial force on the housing 2, reducing the rigidity requirements of the housing 2, and expanding the range of materials to be selected for the housing 2.

[0042] In the sealing structure of this embodiment, the sealing cavity 4 includes a first compression groove 6 formed in the circumference of the housing 2. A sealing part 3 is sleeved on the first compression groove 6 and is interference-fitted with the sealing part 3 to achieve pre-tight positioning of the sealing part 3 so as to facilitate the fastening of the cover 1.

[0043] Specifically, the sealing part 3 is set as an O-ring, and the first compression groove 6 is designed according to the O-ring design specifications with the upper tolerance, so that the diameter of the first compression groove 6 is interference-fitted with the inner diameter of the sealing part 3. With the above settings, when the O-ring is first fitted onto the housing 2, it can be slightly tightened to achieve pre-tightening, effectively preventing the O-ring from falling off, facilitating the snap-fit ​​assembly of the cover 1 and the housing 2, and avoiding the gap between the sealing part 3 and the housing 2 from affecting the subsequent compression and sealing effect.

[0044] In the sealing structure of this embodiment, the sealing cavity 4 further includes a second compression groove 7 formed on the inner wall of the cover edge 5. When the cover 1 and the housing 2 are fastened together, the second compression groove 7 approaches the first compression groove 6 and forms a sealing cavity 4 to compress the sealing part 3 to achieve a seal on the inside of the housing 2.

[0045] Specifically, the second compression groove 7 is a stepped structure opened on the inner wall of the cover edge 5, and the first compression groove 6 is a stepped structure opened on the side of the housing 2. The two stepped structures are interlocked to form a sealing cavity 4. When assembling the cover 1, the steps on the cover edge 5 and the steps on the housing 2 gradually approach each other, thereby increasing the degree of compression on the sealing part 3 to ensure the sealing part 3 seals between the cover 1 and the housing 2.

[0046] In the sealing structure of this embodiment, the first compression groove 6 includes a first compression surface 8 for supporting the sealing part 3, and the second compression groove 7 includes a second compression surface 9 that cooperates with the first compression surface 8 for radially pressing the sealing part 3. The second compression surface 9 is arranged parallel to the first compression surface 8.

[0047] Specifically, both the first compression surface 8 and the second compression surface 9 are cylindrical surfaces and are coaxially arranged. The inner wall of the sealing part 3 is attached to the first compression surface 8. When the cover 1 is fastened, the second compression surface 9 approaches the first compression surface 8 and the sealing part 3 along the axial direction. The sealing part 3 is axially limited by the step structure. The second compression surface 9 squeezes the outer wall of the sealing part 3, causing the sealing part 3 to compress and deform gradually and move between the two compression surfaces, ensuring the seal at the connection between the cover 1 and the shell 2, and achieving radial sealing. At this time, the shell 2 is subjected to radial force, and the material rigidity requirement is small.

[0048] In the sealing structure of this embodiment, the first compression groove 6 includes a first limiting surface 10 for limiting the sealing part 3, and the second compression groove 7 includes a second limiting surface 11 disposed opposite to the first limiting surface 10. The sealing part 3 is located between the first limiting surface 10 and the second limiting surface 11 to achieve axial positioning of the housing 2 and ensure uniform compression of the sealing part 3.

[0049] Specifically, the first limiting surface 10 is a horizontal plane located on the sealing end face of the housing 2. This horizontal plane is perpendicular to the first compression surface 8, and the two form an L-shape. The first compression surface 8 and the first limiting surface 10 form a stepped structure. The first limiting surface 10 is used to limit the position of the O-ring on the housing 2 and prevent the sealing part 3 from moving axially on the housing 2 when the second compression surface 9 squeezes the sealing part 3. Similarly, the sealing surface on the cover 1 is also designed as an L-shaped stepped structure. The vertical compression surface compresses the inner and outer diameters of the O-ring to achieve radial sealing, while the horizontal surface is used to limit the position of the O-ring.

[0050] With the above settings, after the cover 1 is installed, the shell 2 and the vertical cylindrical surface of the cover 1 are sealed by compression O-rings. The compression surface is a cylindrical arc surface, which has higher strength than a flat surface under the same thickness. This can reduce the strength requirements of the shell 2. For materials such as plastic parts, it can avoid deformation due to insufficient surface strength, which would lead to sealing failure.

[0051] In the sealing structure of this embodiment, a first guide surface 12 is inclinedly provided on the inner wall edge of the cover edge 5, and a second guide surface 13 matching the first guide surface 12 is provided on the housing 2. When the cover 1 and the housing 2 are fastened together, the first guide surface 12 compresses the sealing part 3 and guides the sealing part 3 into the sealing cavity 4 for further compression to achieve sealing of the inside of the housing 2.

[0052] Specifically, to facilitate the entry of the sealing part 3 into the sealing cavity 4 when the second compression surface 9 compresses the sealing part 3, a guide structure is designed at the end of the cover edge 5. The first guide surface 12 is connected to the second compression surface 9, and the two are transitioned by a rounded chamfer. The first guide surface 12 is set at a certain angle to the installation direction of the cover body 1. During the installation of the cover body 1, the first guide surface 12 first contacts the surface of the sealing part 3 and performs progressive compression. At the same time, due to the inclined setting, the first guide surface 12 can play a gathering role for the sealing part 3 during the compression process, so that the sealing part 3 enters between the two compression surfaces in the vertical direction to achieve sealing, which facilitates the installation of the cover plate. A rounded chamfer is set between the first guide surface 12 and the second compression surface 9 to protect the sealing part 3, i.e., the O-ring, and prevent the O-ring from being squeezed and broken during the installation process, causing it to fall off.

[0053] Preferably, a second guide surface 13 matching the first guide surface 12 is provided on the sealing end face of the housing 2, and a stepped structure is provided between the second guide surface 13 and the outer surface of the housing 2 to limit the axial movement of the cover 1.

[0054] Preferably, in order to achieve a good guiding effect, the guide structure has certain requirements for the included angle A between the first guide surface 12 and the second compression surface 9, preferably 155°~165°.

[0055] The sealing structure of this embodiment also includes a locking assembly. The two ends of the housing 2 are open and connected to a cover 1. The two covers 1 are locked together by the locking assembly to fix them to the two ends of the housing 2 and compress the sealing part 3, thereby achieving a seal on the inside of the housing 2.

[0056] Specifically, the two end caps 1 are fixed by being tightened by a vertical locking assembly, at which point the locking assembly experiences a reaction force. ,in A radial clamping force is applied to the O-ring by the second compression surface 9. μ is the coefficient of friction between the O-ring and the second compression surface 9, which is less than 1. In addition, the coefficient of friction can be reduced by adding lubricant. The above settings can greatly reduce the installation resistance and facilitate the installation of the cover 1 and the housing 2. Compared with the axial compression structure, fewer locking components are needed to meet the fastening requirements.

[0057] In the sealing structure of this embodiment, the locking assembly includes a bolt 16 and a nut 17. The cover 1 has a mounting hole 18 for inserting the bolt 16. The bolt 16 passes through the mounting holes 18 on both covers 1 and is fastened by the nut 17. Several sets of bolts 16 are evenly arranged around the circumference of the housing 2 to stably connect the cover 1 and the housing 2.

[0058] Specifically, one end of the bolt 16 is provided with a limiting block that abuts against and limits the top cover 1, while the other end passes through the mounting holes 18 on both ends of the cover 1 and is fastened through the pad and nut 17, thus completing the installation of the cover 1 and the shell 2.

[0059] In this application, a radial compression O-ring seal is used for sealing and axial bolt 16 for fastening. The reaction force that needs to be overcome when tightening the bolt 16 is converted into the friction force of the O-ring, which reduces the torque required when tightening the bolt 16, thereby reducing the number of bolts 16 used, reducing assembly time, and facilitating manual disassembly and assembly.

[0060] In the sealing structure of this embodiment, a limiting component is provided between the cover 1 and the housing 2. The limiting component includes a boss 14 on the cover 1 and a groove 15 on the housing 2. The boss 14 is inserted into the groove 15 to prevent the cover 1 and the housing 2 from rotating relative to each other.

[0061] To limit the rotation of the cover 1 after assembly, a groove-shaped limiting structure is provided between the cover 1 and the shell 2. The boss 14 on the cover 1 and the groove 15 on the shell 2 are inserted and matched to effectively limit the rotation of the cover 1 and at the same time play a positioning role. When the boss 14 and the groove 15 are matched, the mounting holes 18 of the upper and lower cover 1 can be accurately positioned, avoiding the problem of the mounting holes 18 being misaligned and needing constant adjustment during the installation of the cover 1.

[0062] Preferably, the boss 14 is disposed on the first guide surface 12, and the groove is formed on the second guide surface 13. The above arrangement avoids the boss 14 structure from affecting the installation of the bolt 16.

[0063] On the other hand, this application also proposes a water pump 19, which includes a sealing structure as described in any of the above embodiments. The water pump 19 in this embodiment includes upper and lower end covers and a stator housing, which correspond to the upper and lower cover 1 and housing 2 in the above embodiments, respectively. It is foreseeable that the water pump 19 in this application includes all the beneficial effects of the sealing structure in the above embodiments, which will not be repeated here.

[0064] On the other hand, this application also proposes an air conditioner that includes a water pump 19 as described in any of the above embodiments. It is foreseeable that the air conditioner in this application includes all the beneficial effects of the water pump 19 in the above embodiments, which will not be repeated here.

[0065] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "rotation", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0066] Although embodiments of the present invention have been shown and described in detail, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure, characterized in that, The device includes a cover, into which a housing is inserted. A sealing part is provided between the housing and the cover. The sealing part is sleeved on the periphery of the housing. When the cover is fastened onto the housing, the inner wall of the cover presses against the sealing part to achieve radial sealing, thereby ensuring the sealing effect inside the housing.

2. The sealing structure according to claim 1, characterized in that, The sealing part is located inside the sealing cavity. The volume of the sealing cavity gradually decreases as the cover and the shell are fastened together, so as to compress the sealing part and achieve sealing of the inside of the shell.

3. The sealing structure according to claim 2, characterized in that, The cover includes a cover edge, and the sealing cavity is located between the cover edge and the housing. The cover edge is annular and coaxially arranged with the housing to ensure uniform radial compression of the sealing part.

4. The sealing structure according to claim 3, characterized in that, The sealing cavity includes a first compression groove formed in the circumference of the housing. A sealing part is sleeved on the first compression groove and is interference-fitted with the sealing part to achieve pre-tight positioning of the sealing part for easy fastening of the cover.

5. A sealing structure according to claim 4, characterized in that, The sealing cavity also includes a second compression groove formed on the inner wall of the cover edge. When the cover is fastened to the housing, the second compression groove approaches the first compression groove and forms a sealing cavity to compress the sealing part and achieve a seal on the inside of the housing.

6. A sealing structure according to claim 5, characterized in that, The first compression groove includes a first compression surface for supporting the sealing portion, and the second compression groove includes a second compression surface that cooperates with the first compression surface for radially compressing the sealing portion, the second compression surface being disposed parallel to the first compression surface.

7. A sealing structure according to claim 5, characterized in that, The first compression groove includes a first limiting surface for limiting the sealing part, and the second compression groove includes a second limiting surface disposed opposite to the first limiting surface. The sealing part is located between the first limiting surface and the second limiting surface to achieve positioning in the axial direction of the housing and ensure uniform compression of the sealing part.

8. A sealing structure according to claim 3, characterized in that, A first guide surface is inclinedly provided on the inner wall edge of the cover, and a second guide surface matching the first guide surface is provided on the housing. When the cover and the housing are fastened together, the first guide surface compresses the sealing part and guides the sealing part into the sealing cavity for further compression to achieve sealing of the inside of the housing.

9. A sealing structure according to claim 1, characterized in that, A limiting component is provided between the cover and the shell. The limiting component includes a boss on the cover and a groove on the shell. The boss is inserted into the groove to prevent the cover and the shell from rotating relative to each other.

10. A sealing structure according to claim 1, characterized in that, It also includes a locking assembly, wherein the two ends of the housing are open and connected to a cover, and the two covers are locked together by the locking assembly to be fixedly connected to the two ends of the housing and to compress and seal the sealing part, thereby achieving a seal on the inside of the housing.

11. A sealing structure according to claim 10, characterized in that, The locking assembly includes bolts and nuts. The cover has mounting holes for inserting bolts. The bolts pass through the mounting holes on both covers and are fastened by nuts. Several sets of bolts are evenly arranged along the circumference of the housing to stably connect the cover and the housing.

12. A water pump, characterized in that, Includes a sealing structure as described in any one of claims 1-11.

13. An air conditioner, characterized in that, Including the water pump described in claim 12.

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