Sealing structure
By using a sealing structure in which the sheath is integrated with the connecting pipe in the compressor, the problem of high cost and easy leakage in the prior art is solved, and an efficient and reliable sealing effect is achieved.
Patent Information
- Application Number
- CN202420503416.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-14
AI Technical Summary
While ensuring the reliability of sealing, the existing compressor sealing structure has problems such as high manufacturing costs, complex structures and easy leakage during transportation or storage.
A sealing structure is adopted where the sheath is connected to the connecting pipe through fitting. The sheath includes an end plate and a U-shaped edge, combined with the design of the ring groove and flange, achieving a reliable connection without threads.
The compressor sealing during transportation or storage is achieved, which reduces manufacturing costs, simplifies the structure and avoids the risk of leakage during tightening and loosening of the nuts.
Smart Images
Figure CN222457700U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of compressors, and more specifically, to a sealing structure of a compressor. Background Art
[0002] A fully enclosed compressor is a device that encapsulates the compression mechanism and driving components in a shell, with only the suction / exhaust pipes, process pipes, and wiring terminals exposed to the outside of the shell. When the equipment leaves the factory, it needs to be filled with a certain amount of compressor oil and nitrogen to maintain a positive pressure inside the shell, thereby preventing air or dirt from entering the compressor during transportation and causing corrosion or contamination of internal parts. Therefore, whether the sealing of the external pipeline is good plays a key role in the life and reliability of the compressor. How to reduce the cost of sealing components while ensuring the reliability of the seal has become an urgent problem to be solved. Utility Model Content
[0003] The present application provides a sealing structure, which is applied to a compressor, and the compressor has a connecting pipe extending out of a shell, and is characterized in that the sealing structure comprises: a sealing member, which is arranged at the end of the connecting pipe along the axial direction of the connecting pipe and is used to seal the pipe opening of the connecting pipe; a sleeve, which is sleeved on the connecting pipe, and the sleeve comprises an end plate and a U-shaped surrounding edge located within the edge of the end plate, and the end plate and the U-shaped surrounding edge together form a protective chamber to accommodate the end of the connecting pipe and the sealing member; wherein an annular groove is arranged on the outer peripheral surface of the connecting pipe, and a positioning portion is arranged on the sleeve, and the positioning portion comprises: a flange, which is located on the edge of the U-shaped surrounding edge away from the end plate; when the sleeve is sleeved on the connecting pipe along the radial direction of the connecting pipe, the flange is embedded in the annular groove to limit the movement of the sleeve along the axial direction of the connecting pipe.
[0004] Optionally, the U-shaped edge includes a first straight line segment, a circular arc segment and a second straight line segment, the first straight line segment is parallel to the second straight line segment, the distance between the inner walls of the first straight line segment and the second straight line segment is greater than or equal to the outer diameter of the connecting tube, and the diameter of the inner wall of the circular arc segment is greater than or equal to the outer diameter of the connecting tube.
[0005] Optionally, the seal is a sealing plug, including a plug body and a boss formed at one end of the plug body and protruding outward in the radial direction of the plug body, the plug body extends into the pipe mouth of the connecting pipe, and the boss is located at the end of the connecting pipe along the axial direction of the connecting pipe; wherein, the outer diameter of the plug body is greater than or equal to the inner diameter of the connecting pipe, and the outer diameter of the boss is less than or equal to the outer diameter of the connecting pipe; the side of the boss away from the plug body is the first end face of the seal, and when the sleeve is mounted on the connecting pipe, the first end face abuts against the inner wall of the end plate.
[0006] Optionally, the flange is located on the entire edge of the U-shaped edge away from the end plate, the flange is U-shaped, and the flange has a width in the direction from the first straight line segment or the second straight line segment of the U-shaped edge to the arc segment.
[0007] Optionally, the cross-sectional shape of the flange matches the cross-sectional shape of the annular groove.
[0008] Optionally, the distance between the center of the cross section of the flange and the inner wall of the end plate is a first distance, the distance between the center of the cross section of the annular groove and the first end face is a second distance, and the first distance is less than or equal to the second distance.
[0009] Optionally, the positioning portion also includes a first protrusion and a second protrusion arranged on the flange, and the first protrusion and the second protrusion are respectively located on the first straight line segment and the second straight line segment of the U-shaped surrounding edge and close to the opening of the U-shaped surrounding edge, for limiting the movement of the sleeve along the radial direction of the connecting pipe.
[0010] Optionally, the sheath is made by integral molding.
[0011] Optionally, the sheath is made of non-metallic material.
[0012] Optionally, the non-metallic material is one of the following materials: polyamide resin, polyetheretherketone, and polyimide.
[0013] Optionally, the sheath is made by 3D printing.
[0014] In the sealing structure provided in the embodiment of the present application, the sleeve and the connecting pipe are connected by means of an interlocking manner, and there is no need to machine threads on the pipe fitting. It has low cost, simple structure and reliable connection, and can ensure the sealing of the compressor during transportation or storage. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of a sealing structure of a compressor.
[0016] Figure 2 It is a schematic diagram of the sealing structure provided in an embodiment of the present application.
[0017] Figure 3 yes Figure 2 Schematic diagram of the local structure of the sheath. DETAILED DESCRIPTION
[0018] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.
[0019] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.
[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0021] A fully enclosed compressor is a device that encloses the compressor and drive components in a shell, with only the suction / exhaust pipes, process pipes, and wiring terminals exposed outside the shell. When the equipment leaves the factory, it needs to be filled with a certain amount of compressor oil and nitrogen to maintain a positive pressure inside the shell, thereby preventing air or dirt from entering the compressor during transportation and causing corrosion or contamination of internal parts. Therefore, whether the sealing of the external pipeline is good plays a key role in the life and reliability of the compressor.
[0022] Figure 1 is a schematic diagram of a compressor pipeline sealing structure 100, Figure 1 1 shows a partial housing 111 of a compressor, and a pipe 112 extending from the housing 111, the pipe 112 being in communication with the interior of the compressor. The sealing structure 100 further includes a sealing gasket 120, which is disposed at one end of the pipe 112 away from the housing. The sealing structure 100 further includes a nut 130, the inner side of which is provided with an internal thread 131, and an external thread 1121 is disposed on the outer peripheral surface of the pipe 112, which matches the internal thread 131, so that the nut 130 can be fixed to the end of the pipe 112.
[0023] During the process of screwing in the thread, the nut 130 will move along the axial direction of the pipe 112 so that the end face of the sealing gasket 120 can abut against the inner wall of the nut 130 . Then, screwing in the nut 130 can press the sealing gasket 120 against the end of the pipe 112 .
[0024] The sealing gasket 120 is usually made of a flexible material such as rubber, which can be deformed under external force. Therefore, when the nut 130 is screwed in, the sealing gasket 120 can be tightly fitted on the end of the pipe 112 under external force, thereby achieving the effect of sealing the pipe 112.
[0025] Figure 1 The sealing structure 100 shown in the figure can achieve reliable sealing, but it still has some problems, which are described in detail below. First, the threaded sealing method requires processing external threads on the outer wall of the connecting pipe, which will increase the manufacturing cost; second, the compressor manufacturer needs to tighten the nut before leaving the factory, and the end customer needs to loosen the nut after receiving the compressor product, which increases the production cost; finally, in the process of tightening and loosening the nut, the compressor connecting pipe is easily damaged, increasing the risk of leakage in the refrigeration system.
[0026] In view of the above problems, an embodiment of the present application provides a sealing structure, which has a simple structure, low cost, and can be manually assembled or disassembled.
[0027] Figure 2 is a schematic diagram of a sealing structure provided in an embodiment of the present application, Figure 3 yes Figure 2 The sealing structure is described in more detail below in conjunction with the accompanying drawings.
[0028] Figure 2 The sealing structure 200 in the embodiment includes a sealing member 210 and a sheath 220. The sealing member 210 is arranged at the end of the connecting pipe 230 along the axial direction of the connecting pipe 230 to seal the pipe opening of the connecting pipe 230.
[0029] The sheath 220 is sleeved on the connecting pipe 230, and the sheath 220 includes an end plate 221. Figure 3 As shown, the end plate 221 includes an upper surface and a lower surface, and a U-shaped edge 222 is provided on the upper surface of the end plate. The U-shaped edge 222 has an opening, and the upper surface of the end plate 221 and the U-shaped edge 222 together form a protective chamber for accommodating the end of the connecting pipe 230 and the seal 210.
[0030] An annular groove 231 is provided on the outer circumference of the connecting pipe 230, and a positioning portion 223 is provided on the sheath 220. The positioning portion 223 includes: a flange 2231, which is located on the inner side of the U-shaped surrounding edge 222 and on the edge of the side away from the upper surface of the end plate 221, that is, the flange 2231 is at the edge of the opening side of the U-shaped surrounding edge 222 and has a "U" shape. The flange 2231 has a certain width and shape, so that the flange 2231 can be cooperatively embedded in the annular groove 231. In other words, the flange 2231 can extend in a direction perpendicular to the plane where the opening of the U-shaped surrounding edge 222 is located and in a direction close to the protection chamber.
[0031] As mentioned above, the U-shaped surrounding edge 222 has an opening, and when the sheath 220 is sleeved on the connecting tube 230, the end of the connecting tube 230 can pass through the opening. At the same time, the flange 2231 can be embedded in the annular groove 231, thereby limiting the movement of the sheath 220 along the axial direction of the connecting tube 230.
[0032] In the sealing structure provided in the embodiment of the present application, the sleeve and the connecting pipe are connected by means of an interlocking manner, and there is no need to machine threads on the pipe fitting. It has low cost, simple structure and reliable connection, and can ensure the sealing of the compressor during transportation or storage.
[0033] In some embodiments, see Figure 2 and Figure 3 The U-shaped surrounding edge 222 on the sheath 220 includes a first straight segment 2221, a circular arc segment 2222, and a second straight segment 2223. The first straight segment 2221 and the second straight segment 2223 are parallel, and the distance between their inner walls is greater than or equal to the outer diameter of the connecting tube 230. The diameter of the inner wall of the circular arc segment 2222 is greater than or equal to the diameter of the connecting tube 230, so that the connecting tube 230 can be tightly sleeved in the sheath 220.
[0034] In some embodiments, Figure 1 As shown, the seal 210 is a sealing plug, including a plug body 211 and a boss 212 formed at one end of the plug body 211 and protruding outward along the radial direction of the plug body 211. The plug body 211 extends into the pipe mouth of the connecting pipe 230, and the boss 212 is located at the end of the connecting pipe 230 along the axial direction of the connecting pipe 230.
[0035] The sealing member 210 is usually made of an elastic material, such as rubber.
[0036] The outer diameter of the plug body 211 is greater than or equal to the inner diameter of the connecting tube 230, so that the outer surface of the plug body 211 can fit the inner wall of the connecting tube 230 to ensure a reliable seal. The outer diameter of the boss 212 is less than or equal to the outer diameter of the connecting tube 230 and preferably greater than the inner diameter of the connecting tube 230.
[0037] The side of the boss 212 away from the plug body 211 is the first end face of the seal 210. When the sleeve 220 is sleeved on the connecting pipe 230, the first end face can abut against the inner wall of the end plate 221 of the sleeve 220 (that is, the upper surface of the end plate 221 mentioned above).
[0038] In some embodiments, see Figure 2 , the cross-sectional shape of the flange 2231 matches the cross-sectional shape of the annular groove 231. It should be understood that the cross-sectional shape matching mentioned here means that the cross-sectional shape of the flange 2231 is the same as that of the annular groove 231 in the cross section passing through the axis of the connecting pipe 230. The embodiment of the present application does not limit the shape of the cross section, and its cross-sectional shape can be, for example, a rectangle or a semicircle, or a trapezoid as shown in the figure.
[0039] In some embodiments, continue to refer to Figure 2 The distance between the center of the cross section of the flange 2231 and the inner wall of the end plate 221 is a first distance D1, and the distance between the center of the cross section of the annular groove 231 and the first end face of the boss 212 is a second distance D2. The first distance D1 is less than or equal to the second distance D2 to ensure that when the sleeve 220 is sleeved on the connecting pipe 230, the end plate 221 can be in close contact with the first end face, providing pressure for the seal 210 along the axial direction of the connecting pipe 230.
[0040] In some embodiments, Figure 3As shown, the positioning portion 223 also includes a first protrusion 2232 and a second protrusion 2233 located on the flange 2231, so that the height of the first protrusion 2232 and the second protrusion 2233 is higher than the flange 2231. Further, the first protrusion 2232 and the second protrusion 2233 are respectively located at one end of the first straight line segment 2221 and the second straight line segment 2223 of the U-shaped surrounding edge 222 away from the upper surface of the end plate 221, close to the opening of the U-shaped surrounding edge 222 and at a certain distance from the opening. In addition, the distance between the highest points of the first protrusion 2232 and the second protrusion 2233 is less than the diameter of the bottom surface of the annular groove 2231. In this case, when the sleeve 220 is installed on the connecting tube 230 along the radial direction of the connecting tube 230, since the first protrusion 2232 and the second protrusion 2233 are a certain distance away from the opening of the U-shaped edge 222, the flange 2231 at this distance is first pressed and moved along the bottom surface of the annular groove 231, and then the first protrusion 2232 and the second protrusion 2233 contact the bottom surface of the annular groove 231. Under the action of pressure, the sleeve 220 is elastically deformed, and then the first protrusion 2232 and the second protrusion 2233 continue to move in the direction of pressing (i.e., in the direction toward the protective chamber away from the sleeve); under the action of continuous external force, the sleeve 220 continues to move along the radial direction of the connecting tube 230 until it is installed in place, and after the operator hears a "click" sound, the first protrusion 2232 and the second protrusion 2233 rebound to their initial positions. Since the distance between the highest points of the first protrusion 2232 and the second protrusion 2233 is smaller than the diameter of the bottom surface of the annular groove 2231, the sleeve 220 can be prevented from sliding out along the radial direction of the connecting pipe 230, so as to ensure that the sleeve 220 can be reliably installed on the connecting pipe 230 during the transportation or storage of the compressor, so that the end plate of the sleeve 220 can tightly abut against the first end face of the seal 210, thereby realizing pipeline sealing during the transportation or storage of the compressor.
[0041] In some embodiments, the sheath 220 is made of one piece.
[0042] In some embodiments, the sheath 220 is made by 3D printing.
[0043] In some embodiments, the sheath 220 is made of a non-metallic material, and the non-metallic material may be one of polyamide resin, polyetheretherketone, and polyimide.
[0044] Preferably, the sheath 220 is made of polyamide resin (PA66), which can operate at -40°C to 80°C, is less affected by temperature, has good mechanical properties, and has a high pressure-bearing capacity, and can effectively ensure the sealing of the compressor during transportation or storage.
[0045] In addition, the use of a sheath made of non-metallic materials can prevent damage to the coating on the outside of the connecting pipe during the disassembly and assembly process, thereby preventing the pipe fittings from rusting.
[0046] The sealing structure according to the embodiment of the present application can be applied to the pipe parts extending from the compressor housing to prevent the leakage of oil or gas inside the compressor during the transportation or storage of the compressor, so as to achieve the sealing of the compressor during the transportation or storage of the compressor.
[0047] In the description of the present application, it should be understood that the terms "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 indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0049] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0050] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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, without contradiction.
[0052] 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. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A sealing structure, applied to a compressor, wherein the compressor has a connecting pipe extending out of a housing, characterized in that: The sealing structure comprises: A sealing member, arranged at the end of the connecting pipe along the axial direction of the connecting pipe, and used for sealing the pipe opening of the connecting pipe; A sheath, which is sleeved on the connecting pipe, and the sheath comprises an end plate and a U-shaped surrounding edge located within the edge of the end plate, wherein the end plate and the U-shaped surrounding edge together form a protective chamber to accommodate the end of the connecting pipe and the sealing member; Wherein, an annular groove is arranged on the outer peripheral surface of the connecting pipe, and a positioning portion is arranged on the sheath, and the positioning portion comprises: a flange, which is located on the edge of the U-shaped surrounding edge away from the end plate; When the sleeve is sleeved on the connecting pipe along the radial direction of the connecting pipe, the flange is embedded in the annular groove to limit the movement of the sleeve along the axial direction of the connecting pipe.
2. The sealing structure according to claim 1, characterized in that: The U-shaped surrounding edge includes a first straight line segment, an arc segment and a second straight line segment, the first straight line segment is parallel to the second straight line segment, the distance between the inner walls of the first straight line segment and the second straight line segment is greater than or equal to the outer diameter of the connecting tube, and the diameter of the inner wall of the arc segment is greater than or equal to the outer diameter of the connecting tube.
3. The sealing structure according to claim 2, characterized in that: The sealing member is a sealing plug, comprising a plug body and a boss formed at one end of the plug body and protruding outwardly in the radial direction of the plug body, the plug body extends into the pipe opening of the connecting pipe, and the boss is located at the end of the connecting pipe along the axial direction of the connecting pipe; Wherein, the outer diameter of the plug body is greater than or equal to the inner diameter of the connecting pipe, and the outer diameter of the boss is less than or equal to the outer diameter of the connecting pipe; The side of the boss away from the plug body is the first end face of the seal. When the sheath is sleeved on the connecting pipe, the first end face abuts against the inner wall of the end plate.
4. The sealing structure according to claim 3, characterized in that: The flange is located on the entire edge of the U-shaped edge away from the end plate, the flange is U-shaped, and has a width in the direction from the first straight line segment or the second straight line segment of the U-shaped edge to the arc segment.
5. The sealing structure according to claim 4, characterized in that: The cross-sectional shape of the flange matches the cross-sectional shape of the annular groove.
6. The sealing structure according to claim 5, characterized in that: The distance between the center of the cross section of the flange and the inner wall of the end plate is a first distance, and the distance between the center of the cross section of the annular groove and the first end face is a second distance, and the first distance is less than or equal to the second distance.
7. The sealing structure according to any one of claims 2 to 6, characterized in that: The positioning portion also includes a first protrusion and a second protrusion arranged on the flange, and the first protrusion and the second protrusion are respectively located on the first straight segment and the second straight segment of the U-shaped surrounding edge and close to the opening of the U-shaped surrounding edge, for limiting the movement of the sleeve along the radial direction of the connecting pipe.
8. The sealing structure according to any one of claims 1 to 6, characterized in that: The sheath is made by integral molding.
9. The sealing structure according to claim 8, characterized in that: The sheath is made of non-metallic material.
10. The sealing structure according to claim 9, characterized in that: The non-metallic material is one of the following materials: polyamide resin, polyetheretherketone, and polyimide.
11. The sealing structure according to claim 8, characterized in that: The sheath is made by 3D printing.