Sealing and fixed connection method, sealing and fixed connection structure and liquid cooling converter

Abstract

The invention discloses a sealing fixed connection method, a sealing fixed connection structure and a liquid cooling converter. According to the sealing and fixed connection method, the distance between two opposite faces after fixed connection is limited, the elastic sealing piece arranged between the two faces is prevented from being excessively compressed, the technical prejudice is overcome in the mode, and therefore sealing failure caused by the excessive compression of the elastic sealing piece is prevented. And the distance between the two surfaces cannot be changed due to the fixed connection relationship, so that the sealing stability is ensured.

Description

Technical Field

[0001] The invention relates to the field of sealing, and in particular to a sealing fixing method, a sealing fixing structure and a liquid-cooled converter. Background Art

[0002] In areas that require waterproofing and dustproofing, sealing treatment is required. Usually, a sealing strip is placed on an object, and then another object is pressed against the sealing strip. The two objects are brought close to each other and locked by multiple sets (at least two) of screws or bolts, and the corresponding sealing is achieved by compressing the sealing strip. When operating, the relevant personnel usually believe that bringing the two objects closer together can ensure a better sealing effect. Therefore, multiple sets of screws or bolts are usually locked to the tightest until the operation cannot be performed. However, after this operation, the sealing effect is poor. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and to provide a sealing fixing method, a sealing fixing structure and a liquid-cooled converter.

[0004] To achieve the above objectives, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Solution 1 is a sealing and fixing method, which prevents the elastic sealing member placed between the two surfaces from being over-compressed by limiting the distance between the two surfaces facing each other after fixing.

[0006] Option 2, a sealing fixing structure, includes a first object, a second object, an elastic seal, a fastening unit and a limiting structure, the first object is provided with a first surface, the second object is provided with a second surface opposite to the first surface, the elastic seal is placed between the first surface and the second surface, the fastening unit fixes the first object and the second object, and the limiting structure ensures the spacing between the first surface and the second surface to avoid excessive compression of the elastic seal.

[0007] Solution three, based on solution two, the limiting structure is located between the first surface and the second surface, and the two surfaces of the limiting structure are respectively suitable for abutting against the first surface and the second surface to ensure the spacing between the first surface and the second surface.

[0008] Solution 4: Based on Solution 3, the limiting structure is located on the side of the elastic sealing component away from the sealing portion.

[0009] Solution five, based on Solution two, the fastening unit is provided with the limiting structure, and the limiting structure includes a first limiting surface and a second limiting surface; the two surfaces of the elastic seal act on the first surface and the second surface respectively, so that the first limiting surface is against the surface of the first object facing away from the second object, and the second limiting surface is against the surface of the second object facing away from the first object; the interval between the first surface and the second surface is ensured by ensuring the distance between the first limiting surface and the second limiting surface.

[0010] Solution six, based on Solution five, the fastening unit includes a first threaded member and a second threaded member, the first threaded member and the second threaded member are respectively provided with the first limiting surface and the second limiting surface, the second threaded member is provided with a thread groove, the first threaded member is suitable for passing through the first object and the second object and then being screwed into the thread groove and abutting against the bottom of the thread groove to ensure the distance between the first limiting surface and the second limiting surface.

[0011] Solution seven, based on Solution five, the first object is provided with a first hole, the second object is provided with a second hole corresponding to the first hole, the fastening unit is provided with a contact portion and an elastic portion, the contact portion is provided with the first limiting surface, the elastic portion is provided with the second limiting surface and a guide slope, and the guide slope is suitable for deforming the elastic portion to pass over the first hole and the second hole.

[0012] Option 8, based on Option 2, the fastening unit is suitable for pressing the first object to reduce the interval between the first surface and the second surface, the fastening unit is provided with a third limiting surface facing the second surface, the limiting structure is fixedly connected to the second object and is provided with a fourth limiting surface, the third limiting surface is suitable for abutting against the fourth limiting surface to ensure the interval between the first surface and the second surface.

[0013] Option nine, based on Option two, the fastening unit is suitable for pressing the first object to reduce the interval between the first surface and the second surface, the second object is provided with the limiting structure, the limiting structure is provided with a thread groove, the fastening unit is suitable for passing through the first object and then being screwed to the thread groove, and pressing against the bottom of the thread groove to ensure the interval between the first surface and the second surface.

[0014] Option 10, based on Option 2, the limiting structure is fixedly connected to the first surface, and is provided with a fifth limiting surface located between the first surface and the second surface, and the fifth limiting surface is suitable for abutting against the second surface to ensure the spacing between the first surface and the second surface.

[0015] Solution eleven, based on Solution two, further includes a third object, which is located above the first object and is provided with a through hole. The second object is also provided with a third surface, which is suitable for receiving dust and / or liquid entering through the through hole. The second surface and the through hole are staggered with each other, and the terrain of the third surface is lower than that of the second surface.

[0016] Option 12, a liquid-cooled converter, comprising a sealed fixed structure as described in any one of Option 2 to Option 11.

[0017] From the above description of the present invention and its preferred embodiments, it can be seen that, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0018] 1. The applicant has learned through continuous observation, experimentation and research that the reason why the technical problem of "poor sealing effect after the bolts are locked to the tightest" occurs in the prior art is that, except for the area close to the bolts, there is no compression at other places. If the bolts are pressed too tight and cause excessive compression, the sealing strip between the two bolts will bulge accordingly, resulting in a gap between the sealing strip and one of the two objects, causing the sealing to fail.

[0019] In the scheme 1 and its preferred embodiment, a sealing fixing method is provided, which prevents the elastic sealing member placed between the two surfaces from being over-compressed by limiting the distance between the two surfaces facing each other after fixing. This method overcomes the technical bias, thereby preventing the sealing failure caused by the over-compression of the elastic sealing member. And because the distance between the two surfaces will not change due to the fixing relationship, the stability of the seal is ensured.

[0020] 2. Scheme 2 and its preferred embodiment, a sealing fixing structure includes a first object, a second object, an elastic sealing member, a fastening unit and a limiting structure, wherein the first object is provided with a first surface, the second object is provided with a second surface opposite to the first surface, the elastic sealing member is placed between the first surface and the second surface, and the limiting structure ensures the spacing between the first surface and the second surface to avoid excessive compression of the elastic sealing member and prevent sealing failure. The fastening unit fixes the first object and the second object, making the first object and the second object relatively immovable, and also ensuring that the spacing between the first surface and the second surface does not change after installation is completed, thereby ensuring sealing stability.

[0021] 3. Scheme three and its preferred embodiment, in this scheme, the limiting structure is an independent entity relative to the first object and the second object, the limiting structure is located between the first surface and the second surface, and the two surfaces of the limiting structure are respectively suitable for abutting against the first surface and the second surface to ensure the interval between the first surface and the second surface. During installation, the limiting structure is clamped by the first surface and the second surface, and the first surface and the second surface cannot move closer, thereby ensuring the distance between the first surface and the second surface and ensuring the sealing stability.

[0022] 4. In the fourth scheme and its preferred embodiment, the limiting structure is located on the side of the elastic seal away from the sealing part, and the limiting structure can reduce the amount of water or dust reaching the elastic seal, thereby protecting the elastic seal and preventing the elastic seal from aging. When the surface roughness of the limiting structure is appropriate, a certain degree of sealing can be achieved between the limiting structure and the first surface and the second surface, forming a double sealing effect with the elastic seal.

[0023] 5. Scheme 5 and its preferred embodiments, in this scheme, a limiting structure is provided on the fastening unit, specifically, the fastening unit is provided with a limiting structure, the limiting structure comprising a first limiting surface and a second limiting surface; the two surfaces of the elastic seal act on the first surface and the second surface respectively, so that the first limiting surface abuts against the surface of the first object facing away from the second object, and the second limiting surface abuts against the surface of the second object facing away from the first object; the interval between the first surface and the second surface is ensured by ensuring the distance between the first limiting surface and the second limiting surface; during installation, since the fastening unit is fixed to the first object and the second object, the interval between the first limiting surface and the second limiting surface is determined after the fixing is completed, and due to the elastic action of the elastic seal, the first limiting surface abuts against the surface of the first object facing away from the second object, and the second limiting surface abuts against the surface of the second object facing away from the first object, the elastic force of the elastic seal is limited by the first limiting surface and the second limiting surface, and then the interval between the first surface and the second surface is determined.

[0024] 6. In scheme six and its preferred embodiments, the fastening unit includes a first threaded member and a second threaded member, the first threaded member and the second threaded member are respectively provided with a first limiting surface and a second limiting surface, the second threaded member is provided with a thread groove, the first threaded member is suitable for penetrating the first object and the second object and then being screwed into the thread groove and abutting against the bottom of the thread groove to ensure the distance between the first limiting surface and the second limiting surface. Since the distance between the first limiting surface and the bottom of the thread groove is determined, the distance between the first limiting surface and the second limiting surface is determined, thereby ensuring the interval between the first surface and the second surface.

[0025] 7. In the seventh scheme and its preferred embodiment, the first object is provided with a first hole, the second object is provided with a second hole corresponding to the first hole, the fastening unit is provided with a contact portion and an elastic portion, the contact portion is provided with a first limiting surface, the elastic portion is provided with a second limiting surface and a guiding inclined surface, and the guiding inclined surface is suitable for deforming the elastic portion to pass over the first hole and the second hole. During installation, the guiding inclined surface passes over the first hole and the second hole, and the elastic portion is restored when passing over the second hole, so that the first limiting surface is against the surface of the first object facing away from the second object, and the second limiting surface is against the surface of the second object facing away from the first object, so that the assembly is completed, and the distance between the first limiting surface and the second limiting surface is determined, so as to ensure the interval between the first surface and the second surface.

[0026] 8. In the eighth solution and its preferred embodiment, the fastening unit is suitable for pressing the first object to reduce the interval between the first surface and the second surface, the fastening unit is provided with a third limiting surface facing the second surface, the limiting structure is fixedly connected to the second object and is provided with a fourth limiting surface, and the third limiting surface is suitable for abutting against the fourth limiting surface to ensure the interval between the first surface and the second surface. In this embodiment, the limiting structure ensures the interval between the first surface and the second surface by limiting the position of the fastening unit.

[0027] During installation, as the installation proceeds, the distance between the first surface and the second surface gradually decreases, and the third limiting surface gradually approaches the fourth limiting surface until the third limiting surface abuts the fourth limiting surface. At this time, the third limiting surface cannot move further, and the distance between the first surface and the second surface will not decrease any further, thereby ensuring the distance between the first surface and the second surface.

[0028] 9. In scheme nine and its preferred embodiments, the fastening unit is suitable for pressing the first object to reduce the interval between the first surface and the second surface, the second object is provided with a limiting structure, the limiting structure is provided with a threaded groove, the fastening unit is suitable for passing through the first object and then being screwed to the threaded groove, and pressing against the bottom of the threaded groove to ensure the interval between the first surface and the second surface.

[0029] In this embodiment, the limiting structure is arranged on the second object. During the process of screwing the fastening unit to the thread groove, the interval between the first surface and the second surface gradually decreases until the fastening unit contacts the bottom of the thread groove. The interval between the first surface and the second surface cannot be further reduced, thereby ensuring the interval between the first surface and the second surface.

[0030] 10. In the tenth scheme and its preferred embodiment, the limiting structure is fixed to the first surface, and the limiting structure cannot move relative to the first surface, which is convenient for installation. The limiting structure is provided with a fifth limiting surface located between the first surface and the second surface, and the fifth limiting surface is suitable for abutting against the second surface to ensure the interval between the first surface and the second surface, thereby ensuring the interval between the first surface and the second surface. During installation, the fixing structure gradually reduces the interval between the first surface and the second surface until the fifth limiting surface abuts against the second surface. At this time, the interval between the first surface and the second surface will not be reduced any further, thereby ensuring the interval between the first surface and the second surface.

[0031] 11. Scheme 11 and its preferred embodiments further include a third object, which is located above the first object and is provided with a through hole. The second object is also provided with a third surface, and the second surface and the through hole are staggered to prevent dust and / or liquid entering through the through hole from directly reaching the second surface and affecting the sealing. The third surface is suitable for receiving dust and / or liquid entering through the through hole, and the terrain of the third surface is lower than that of the second surface. Only when the liquid on the third surface overflows to the second surface will it affect the sealing on the second surface, thereby increasing the sealing effect.

[0032] 12. In Scheme 12 and its preferred embodiments, a liquid-cooled converter includes a sealed fixed structure according to any of the above-mentioned schemes and has the beneficial effects brought by the above-mentioned schemes. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a partial structural schematic diagram of the liquid-cooled converter in Example 1;

[0035] Figure 2 for Figure 1 An enlarged schematic diagram of the location;

[0036] Figure 3 This is a schematic diagram of the structure of the sealing part in the second embodiment;

[0037] Figure 4 This is a schematic diagram of the structure of the sealing part in the third embodiment;

[0038] Figure 5 This is a schematic diagram of the structure of the sealing part in the fourth embodiment;

[0039] Figure 6 This is a schematic diagram of the structure of the sealing part in the fifth embodiment;

[0040] Figure 7 This is a schematic diagram of the structure of the sealing part in the sixth embodiment;

[0041] Description of main reference numerals:

[0042] first object 1; first surface 11; first hole 12; second object 2; second surface 21; second hole 22; through hole 23; third surface 24; elastic seal 3; fastening unit 4; first threaded member 41; second threaded member 42; thread groove 421; abutting portion 43; elastic portion 44; guide inclined surface 441; third limiting surface 45; limiting structure 5; first limiting surface 51; second limiting surface 52; fourth limiting surface 53; fifth limiting surface 55; DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

[0045] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0046] In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0047] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0048] A sealing fixing method, by limiting the distance between two surfaces facing each other after fixing, prevents the elastic sealing member 3 placed between the two surfaces from being over-compressed, and overcomes technical prejudice, thereby preventing sealing failure caused by over-compression of the elastic sealing member 3. And because the distance between the two surfaces will not change due to the fixing relationship, the stability of the seal is guaranteed. The following is an embodiment based on the sealing fixing method.

[0049] Embodiment 1:

[0050] refer to Figure 1 , Figure 2 A liquid-cooled converter includes a sealing and fixing structure. The sealing and fixing structure includes a first object 1, a second object 2, an elastic sealing member 3, a fastening unit 4, a limiting structure 5, and a third object.

[0051] The first object 1 is provided with a first surface 11 and a first hole 12 penetrating the first surface 11. The first object 1 may be a housing of a heat exchanger.

[0052] The third object (not shown in the figure) is located above the first object 1 and is provided with a through hole, through which dust and / or liquid may enter due to environmental reasons, such as rainwater or pipeline leakage.

[0053] The second object 2 may be a housing. The second object 2 is provided with a second surface 21 opposite to the first surface 11. The second surface 21 and the through hole are staggered to prevent dust and / or liquid entering through the through hole from directly reaching the second surface 21 and affecting the sealing. The second object 2 is also provided with a through hole 23 and a second hole 22 that penetrate the second surface 21. There are several electrical components below the through hole 23, so the through hole 23 needs to be sealed. The second hole 22 is arranged corresponding to the first hole 12. The second object 2 is also provided with a third surface 24. The third surface 24 is suitable for receiving dust and / or liquid entering through the through hole. The terrain of the third surface 24 is lower than the second surface 21. Only when the liquid at the third surface 24 overflows to the second surface 21 will it affect the sealing at the second surface 21, thereby increasing the sealing effect.

[0054] The elastic sealing member 3 is disposed between the first surface 11 and the second surface 21 for sealing. In this embodiment, the elastic sealing member 3 surrounds the outer periphery of the through hole 23 and the elastic sealing member 3 may be in a strip shape.

[0055] The fastening unit 4 is fixedly connected to the first object 1 and the second object 2, and is used to make the first object 1 and the second object 2 relatively immovable, and also ensure that the interval between the first surface 11 and the second surface 21 does not change after the installation is completed, so as to ensure the sealing stability. In this embodiment, the fastening unit 4 includes a first threaded member 41 and a second threaded member 42, which are a combination of a bolt and a nut. The bolt passes through the first hole 12 and the second hole 22 and is fixedly connected to the nut. The bolt is against the surface of the first object 1 away from the second object 2, and the nut is against the surface of the second object 2 away from the first object 1;

[0056] The limiting structure 5 ensures the interval between the first surface 11 and the second surface 21 to avoid excessive compression of the elastic seal 3 and prevent sealing failure. The limiting structure 5 is located between the first surface 11 and the second surface 21. The two sides of the limiting structure 5 are respectively suitable for contacting the first surface 11 and the second surface 21 to ensure the interval between the first surface 11 and the second surface 21, and the limiting structure 5 is located on the side of the elastic seal 3 away from the sealing part (in this embodiment, the sealing part is the through hole 23). The limiting structure 5 can reduce the amount of water or dust reaching the elastic seal 3, thereby protecting the elastic seal 3 and preventing the elastic seal 3 from aging. When the surface roughness of the limiting structure 5 is appropriate, a certain degree of sealing can be achieved between the limiting structure 5 and the first surface 11 and the second surface 21, forming a double sealing effect with the elastic seal 3. The limiting structure 5 can also be in a strip shape.

[0057] During installation, tighten the bolts and nuts so that the two sides of the limiting structure 5 are respectively against the first surface 11 and the second surface 21, and the limiting structure 5 is clamped by the first surface 11 and the second surface 21. At this time, the installation is completed, and the first surface 11 and the second surface 21 cannot be further approached. The interval between the first surface 11 and the second surface 21 is determined, thereby avoiding excessive compression of the elastic seal 3, ensuring the sealing stability, and at the same time fixing the first object 1 and the second object 2 to each other. Furthermore, the fastening unit 4 can also penetrate the elastic seal 3 so that the position of the elastic seal 3 is limited to a certain extent.

[0058] Embodiment 2:

[0059] The difference between the embodiment 1 and the embodiment 1 is that the structure for ensuring the interval between the first surface 11 and the second surface 21 is different from that in the embodiment 1.

[0060] refer to Figure 3 Specifically, the fastening unit 4 is provided with a limiting structure 5, and the limiting structure 5 includes a first limiting surface 51 and a second limiting surface 52, and the first limiting surface 51 and the second limiting surface 52 clamp the first object 1, the second object 2 and the elastic seal 3. In this embodiment, the fastening unit 4 includes a first threaded member 41 and a second threaded member 42 (a combination of a bolt and a nut in this embodiment), and the first threaded member 41 and the second threaded member 42 are respectively provided with a first limiting surface 51 and a second limiting surface 52. The second threaded member 42 is also provided with a thread groove 421.

[0061] The two surfaces of the elastic seal 3 act on the first surface 11 and the second surface 21 respectively, so that the first limiting surface 51 abuts against the surface of the first object 1 facing away from the second object 2, and the second limiting surface 52 abuts against the surface of the second object 2 facing away from the first object 1; the interval between the first surface 11 and the second surface 21 is ensured by ensuring the distance between the first limiting surface 51 and the second limiting surface 52. The first threaded member 41 is suitable for passing through the first object 1 and the second object 2 and then being screwed with the thread groove 421, and abutting against the bottom of the thread groove 421 to ensure the distance between the first limiting surface 51 and the second limiting surface 52. Since the distance between the first limiting surface 51 and the bottom of the thread groove 421 is determined, the distance between the first limiting surface 51 and the second limiting surface 52 is determined, thereby ensuring the interval between the first surface 11 and the second surface 21.

[0062] During installation, the first threaded member 41 passes through the first hole 12 and the second hole 22 and is screwed to the second threaded member 42, so that the first limiting surface 51 and the second limiting surface 52 are respectively against the first object 1 and the second object 2, and by further tightening the first threaded member 41 and the second threaded member 42, the distance between the first limiting surface 51 and the second limiting surface 52 gradually decreases. At the same time, the interval between the first surface 11 and the second surface 21 gradually decreases until the first threaded member 41 is against the bottom of the thread groove 421. At this time, the first object 1 and the second object 2 are fixed, and at the same time, the interval between the first surface 11 and the second surface 21 is determined.

[0063] Since the fastening unit 4 is fixed to the first object 1 and the second object 2, the interval between the first limiting surface 51 and the second limiting surface 52 is determined after the fixing is completed, and due to the elastic effect of the elastic seal 3, the first limiting surface 51 is against the surface of the first object 1 facing away from the second object 2, and the second limiting surface 52 is against the surface of the second object 2 facing away from the first object 1. The elastic force of the elastic seal 3 is limited by the first limiting surface 51 and the second limiting surface 52, and the interval between the first surface 11 and the second surface 21 is determined.

[0064] Embodiment three:

[0065] The difference between the embodiment 1 and the embodiment 1 is that the structure for ensuring the interval between the first surface 11 and the second surface 21 is different from that in the embodiment 1.

[0066] refer to Figure 4 Specifically, the fastening unit 4 is provided with a limiting structure 5, the fastening unit 4 is provided with an abutting portion 43 and an elastic portion 44 connected as one body, the abutting portion 43 is provided with a first limiting surface 51, the elastic portion 44 is provided with a second limiting surface 52 and a guiding inclined surface 441, and the guiding inclined surface 441 is suitable for deforming the elastic portion 44 to pass over the first hole 12 and the second hole 22. The two surfaces of the elastic seal 3 act on the first surface 11 and the second surface 21 respectively, so that the first limiting surface 51 abuts against the surface of the first object 1 away from the second object 2, and the second limiting surface 52 abuts against the surface of the second object 2 away from the first object 1; the interval between the first surface 11 and the second surface 21 is ensured by ensuring the distance between the first limiting surface 51 and the second limiting surface 52.

[0067] During installation, when the guiding inclined surface 441 abuts against the walls of the first hole 12 and the second hole 22, the elastic portion 44 retracts to pass over the first hole 12 and the second hole 22, and restores when passing over the second hole 22, so that the first limiting surface 51 abuts against the surface of the first object 1 facing away from the second object 2, and the second limiting surface 52 abuts against the surface of the second object 2 facing away from the first object 1, completing the assembly and determining the distance between the first limiting surface 51 and the second limiting surface 52, thereby ensuring the spacing between the first surface 11 and the second surface 21.

[0068] Since the fastening unit 4 is fixed to the first object 1 and the second object 2, the interval between the first limiting surface 51 and the second limiting surface 52 is determined after the fixing is completed, and due to the elastic effect of the elastic seal 3, the first limiting surface 51 is against the surface of the first object 1 facing away from the second object 2, and the second limiting surface 52 is against the surface of the second object 2 facing away from the first object 1. The elastic force of the elastic seal 3 is limited by the first limiting surface 51 and the second limiting surface 52, and the interval between the first surface 11 and the second surface 21 is determined.

[0069] Embodiment 4:

[0070] The difference between the embodiment 1 and the embodiment 1 is that the structure for ensuring the interval between the first surface 11 and the second surface 21 is different from that in the embodiment 1.

[0071] refer to Figure 5 Specifically, the fastening unit 4 is suitable for pressing the first object 1 so as to reduce the interval between the first surface 11 and the second surface 21, that is, during the installation process, the fastening unit 4 is suitable for pushing the first object 1 so as to make the first object 1 approach the second object 2. The fastening unit 4 can be a combination of bolts and nuts, or a bolt directly screwed with the second object 2, or other forms of structures that can fix the first object 1 and the second object 2 so that the interval between the first surface 11 and the second surface 21 remains unchanged during subsequent use. On this basis, the fastening unit 4 is provided with a third limiting surface 45 facing the second surface 21, and the limiting structure 5 is fixedly connected to the second object 2 and is provided with a fourth limiting surface 53. The fixing of the limiting structure 5 to the second object 2 can be detachable or non-detachable, such as welding, integral molding, etc. The third limiting surface 45 is suitable for abutting against the fourth limiting surface 53 to ensure the interval between the first surface 11 and the second surface 21.

[0072] In this embodiment, the limiting structure 5 limits the position of the fastening unit 4, thereby ensuring the interval between the first surface 11 and the second surface 21. During installation, as the installation proceeds, the interval between the first surface 11 and the second surface 21 gradually decreases, and the third limiting surface 45 gradually approaches the fourth limiting surface 53 until the third limiting surface 45 abuts against the fourth limiting surface 53. At this time, the third limiting surface 45 cannot move further, and the interval between the first surface 11 and the second surface 21 will not decrease any more, thereby ensuring the interval between the first surface 11 and the second surface 21.

[0073] Embodiment five:

[0074] The difference between the embodiment 1 and the embodiment 1 is that the structure for ensuring the interval between the first surface 11 and the second surface 21 is different from that in the embodiment 1.

[0075] refer to Figure 6Specifically, the fastening unit 4 is suitable for pressing the first object 1 to reduce the interval between the first surface 11 and the second surface 21. The second object 2 is provided with a limiting structure 5, and the limiting structure 5 is provided with a thread groove 421 (in this embodiment, the second object 2 may not be provided with a second hole 22). The fastening unit 4 is suitable for passing through the first object 1 and then being screwed to the thread groove 421, and abutting against the bottom of the thread groove 421 to ensure the interval between the first surface 11 and the second surface 21.

[0076] In this embodiment, the limiting structure 5 is arranged on the second object 2. During the process of screwing the fastening unit 4 and the threaded groove 421, the interval between the first surface 11 and the second surface 21 gradually decreases until the fastening unit 4 reaches the bottom of the threaded groove 421. The interval between the first surface 11 and the second surface 21 cannot be further reduced, thereby ensuring the interval between the first surface 11 and the second surface 21.

[0077] Embodiment six:

[0078] The difference between the embodiment 1 and the embodiment 1 is that the structure for ensuring the interval between the first surface 11 and the second surface 21 is different from that in the embodiment 1.

[0079] refer to Figure 7 When the first surface 11 and the second surface 21 are perpendicular to the ground, the limiting structure 5 in the first embodiment will fall due to gravity, and the limiting structure 5 needs to be installed by hand, which is troublesome. In this embodiment, the limiting structure 5 is fixed to the first surface 11. In this way, the limiting structure 5 cannot move relative to the first surface 11, which is convenient for installation. The limiting structure 5 can be fixed to the first surface 11 detachably or non-detachably.

[0080] The limiting structure 5 is further provided with a fifth limiting surface 55 located between the first surface 11 and the second surface 21 . The fifth limiting surface 55 is suitable for abutting against the second surface 21 to ensure the interval between the first surface 11 and the second surface 21 .

[0081] During installation, the fixing structure gradually reduces the distance between the first surface 11 and the second surface 21 until the fifth limiting surface 55 abuts against the second surface 21. At this time, the distance between the first surface 11 and the second surface 21 will not be reduced any further, thereby ensuring the distance between the first surface 11 and the second surface 21.

[0082] The description of the above specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the enlightenment of the present invention or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent substitutions or other improvements to the embodiments of the present invention or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the present invention.

Claims

1. A sealing and fixing method, characterized in that: By limiting the distance between two surfaces facing each other after being fixed, the elastic sealing member (3) placed between the two surfaces is prevented from being over-compressed.

2. A sealing and fixing structure, characterized in that: The invention comprises a first object (1), a second object (2), an elastic seal (3), a fastening unit (4) and a limiting structure (5), wherein the first object (1) is provided with a first surface (11), the second object (2) is provided with a second surface (21) opposite to the first surface (11), the elastic seal (3) is arranged between the first surface (11) and the second surface (21), the fastening unit (4) is fixedly connected to the first object (1) and the second object (2), and the limiting structure (5) ensures the interval between the first surface (11) and the second surface (21) to avoid excessive compression of the elastic seal (3).

3. A sealing and fixing structure according to claim 2, characterized in that: The limiting structure (5) is located between the first surface (11) and the second surface (21), and the two surfaces of the limiting structure (5) are respectively suitable for abutting against the first surface (11) and the second surface (21) to ensure the spacing between the first surface (11) and the second surface (21).

4. A sealing and fixing structure according to claim 3, characterized in that: The limiting structure (5) is located on a side of the elastic sealing component (3) away from the sealing portion.

5. A sealing and fixing structure according to claim 2, characterized in that: The fastening unit (4) is provided with the limiting structure (5), and the limiting structure (5) includes a first limiting surface (51) and a second limiting surface (52); the two surfaces of the elastic sealing member (3) act on the first surface (11) and the second surface (21) respectively, so that the first limiting surface (51) abuts against the surface of the first object (1) facing away from the second object (2), and the second limiting surface (52) abuts against the surface of the second object (2) facing away from the first object (1); the interval between the first surface (11) and the second surface (21) is ensured by ensuring the distance between the first limiting surface (51) and the second limiting surface (52).

6. A sealing and fixing structure according to claim 5, characterized in that: The fastening unit (4) comprises a first threaded member (41) and a second threaded member (42), wherein the first threaded member (41) and the second threaded member (42) are respectively provided with the first limiting surface (51) and the second limiting surface (52), and the second threaded member (42) is provided with a thread groove (421), wherein the first threaded member (41) is suitable for penetrating the first object (1) and the second object (2) and then being screwed to the thread groove (421) and abutting against the bottom of the thread groove (421) to ensure the distance between the first limiting surface (51) and the second limiting surface (52).

7. A sealing and fixing structure according to claim 5, characterized in that: The first object (1) is provided with a first hole (12), the second object (2) is provided with a second hole (22) corresponding to the first hole (12), the fastening unit (4) is provided with a contact portion (43) and an elastic portion (44), the contact portion (43) is provided with the first limiting surface (51), the elastic portion (44) is provided with the second limiting surface (52) and a guiding inclined surface (441), and the guiding inclined surface (441) is suitable for deforming the elastic portion (44) to pass over the first hole (12) and the second hole (22).

8. A sealing and fixing structure according to claim 2, characterized in that: The fastening unit (4) is suitable for pressing the first object (1) so as to reduce the interval between the first surface (11) and the second surface (21); the fastening unit (4) is provided with a third limiting surface (45) facing the second surface (21); the limiting structure (5) is fixedly connected to the second object (2) and is provided with a fourth limiting surface (53); the third limiting surface (45) is suitable for abutting against the fourth limiting surface (53) to ensure the interval between the first surface (11) and the second surface (21).

9. A sealing and fixing structure according to claim 2, characterized in that: The fastening unit (4) is suitable for pressing the first object (1) so as to reduce the interval between the first surface (11) and the second surface (21); the second object (2) is provided with the limiting structure (5); the limiting structure (5) is provided with a thread groove (421); the fastening unit (4) is suitable for passing through the first object (1) and then being screwed to the thread groove (421) and pressing against the bottom of the thread groove (421) to ensure the interval between the first surface (11) and the second surface (21).

10. A sealing and fixing structure according to claim 2, characterized in that: The limiting structure (5) is fixedly connected to the first surface (11) and is provided with a fifth limiting surface (55) located between the first surface (11) and the second surface (21), and the fifth limiting surface (55) is suitable for abutting against the second surface (21) to ensure the spacing between the first surface (11) and the second surface (21).

11. A sealing and fixing structure according to claim 2, characterized in that: The invention also comprises a third object, the third object is located above the first object (1) and is provided with a through hole, the second object (2) is also provided with a third surface (24), the third surface (24) is suitable for receiving dust and / or liquid entering through the through hole, the second surface (21) and the through hole are staggered, and the third surface (24) is lower in terrain than the second surface (21).

12. A liquid-cooled converter, characterized in that : comprising a sealing and fixing structure as described in any one of claims 2 to 11.

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