Compressor cover and housing assembly structure and compressor

Abstract

A compressor cover and housing assembly structure, and a compressor using the assembly structure. The assembly structure comprises a cover (1) and a housing (2), wherein the housing (2) has an annular axial end face, the radial outer portion of the axial end face being a radial flat surface (21), and the radial inner portion of the axial end face being a stepped surface (22) which sinks from the radial flat surface (21) towards the middle of the housing (2) to form a recessed boss (20); and the cover (1) is plate-shaped, the cover (1) has an inner face facing the axial end face, the outer periphery of the inner face being a mating flat surface (11) which matches and fits against the radial flat surface (21), and the inner face being provided with a protrusion (10) on the radial inner side of the mating flat surface (11) which matches and meshes with the recessed boss (20). A flattened plate-shaped design is used for the cover, and the mating flat surface located at the outer periphery and the protrusion are formed on the inner face of the cover, thereby forming a flange-free stepped cover, eliminating the need for the stretch flanging structure and process of the cover, and effectively reducing the overall height of the compressor.

Description

Assembly structure of compressor shell cover and shell and compressor TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to an assembly structure of a compressor shell cover and shell and a compressor adopting the same. BACKGROUND

[0002] Currently, rolling rotor compressors are often used as a benchmark for scroll and piston compressors in the fields of vehicle-mounted air conditioners, refrigeration and freezing, kitchen air conditioners, heat pump water heaters, etc. In these fields of application, the horizontal type of rolling rotor compressor can meet the requirements in terms of height, but is not satisfactory in terms of length. In order to meet the application requirements, it is necessary to continuously reduce the height of the vertical type of rolling rotor compressor and make it into a short and fat type. For the short and fat type, the current structure of the upper / lower shell cover commonly used in rotor compressors, as well as the installation method (interpolation or external packaging) of the upper / lower shell cover and the compressor shell (cylinder), has become a major bottleneck for reducing the overall height of the compressor.

[0003] As shown in FIGS. 1a, 1b and 1c, it is an interpolation assembly structure of the upper shell cover 01 and the shell 02 of the existing compressor. The lower end of the upper shell cover 01 is inserted into the shell 02, and the upper shell cover 01 and the shell 02 are sealed and fastened by arc welding 05. In order to ensure the reliability of the compressor's water pressure resistance and pressure pulsation, the upper shell cover 01 has a fillet R angle for stress distribution diffusion, so as to avoid the risk of refrigerant leakage (especially for flammable refrigerant) due to rupture under the condition of stress concentration and insufficient strength. At the same time, it is necessary to ensure that the electrical safety distance L1 of the motor winding 04 on the motor 03 in the shell 02 and the inserted part of the upper shell cover 01 meets the requirements. The R angle that meets the pressure pulsation requirement and the electrical safety distance L1 that meets the requirement result in that the distance H1 from the inner top surface of the upper shell cover 01 to the upper end surface of the motor core 03 cannot be compressed any more, so that the height reduction measure of the compressor cannot be further implemented.

[0004] As shown in FIGS. 2a and 2b, it is an external packaging assembly structure of the upper shell cover 01 and the shell 02 of the existing compressor. The lower end of the upper shell cover 01 is externally sleeved on the upper end of the shell 02, and the upper shell cover 01 and the shell 02 are sealed and fastened by arc welding 05. By stretching the lower end of the upper shell cover 01 into a stepped shape to externally package the upper end of the shell 02, the position of the arc welding 05 in the height direction of the shell 02 can be lowered relative to the interpolation assembly structure of the upper shell cover 01 and the shell 02, so as to realize the reduction of the distance H2 from the inner top surface of the upper shell cover 01 to the upper end surface of the motor core 03, i.e. H2

[0005] As shown in FIGS. 3a and 3b, the schematic diagram of laser welding 06 sealing and fastening for the inner insertion type assembly structure and the outer package type assembly structure of the upper shell cover 01 and the shell 02 of the existing compressor is shown. Since the quality of laser welding is closely related to the fitting precision after the installation of workpieces, and the matching of the thickness of two workpieces and laser welding parameters is also very particular, if the laser welding parameters (factors such as the size of light condensation, intensity, track, angle direction, and residence time) are not matched, it will lead to that the workpiece is not welded through or the welding strength is insufficient (including pores). For the inner insertion type assembly structure and the outer package type assembly structure of the upper shell cover 01 and the shell 02 of the existing compressor, the requirements for laser welding will be too high to meet the strength, not to be welded through, and to generate pores.

[0006] As shown in FIGS. 4a and 4b, the outer package type assembly structure and the inner insertion type assembly structure of the lower shell cover 01' and the shell 02 of the existing compressor are shown. For the assembly of the lower shell cover 01' and the shell 02, the farther the distance h1 / h2 from the center of the air suction pipe seat ring 07 provided on the lower part of the shell 02 to the lower end face of the shell 02, the less likely the air suction pipe seat ring 07 makes the lower end of the shell 02 deformed; at the same time, the smaller the distance H3 / H4 from the center of the air suction pipe seat ring 07 to the outer bottom face of the lower shell cover 01', the more conducive to the height reduction of the compressor. The outer package type assembly structure and the inner insertion type assembly structure of the existing lower shell cover 01' and the shell 02 cannot well balance the above two requirements. SUMMARY

[0007] In view of the above defects of the prior art, the technical problem to be solved by the present application is to provide an assembly structure of a compressor shell cover and a shell, which can effectively realize the height reduction of the compressor.

[0008] In order to solve the above technical problem, the present application adopts the following technical scheme:

[0009] The present application provides an assembly structure of a compressor shell cover and a shell, which comprises a shell cover and a shell. The shell has an annular axial end face, the radially outer side of the axial end face is a radial plane, and the radially inner side of the axial end face is a stepped surface which is recessed from the radial plane to the middle part of the shell to form a recess. The shell cover is in the form of a flat plate, and has an inner side face facing the axial end face. The outer periphery of the inner side face is an abutting plane which is adapted to and abuts the radial plane. A protrusion which is adapted to and engaged with the recess is provided on the inner side face at the radially inner side of the abutting plane.

[0010] Preferably, the outer diameter of the shell cover is equal to the outer diameter of the shell.

[0011] Preferably, the radial width of the abutting plane is equal to the radial width of the radial plane.

[0012] Preferably, the recess and the protrusion are each formed with one or more steps, and the one or more steps of the protrusion are adapted to and engaged with the one or more steps of the recess one by one.

[0013] Preferably, the stepped surface has at least one tapered surface extending obliquely from a radially inner edge of the radial plane toward the middle of the shell, and the protrusion has a tapered section connected to the radially inner edge of the abutment plane, the outer circumferential surface of the tapered section being adapted to the tapered surface.

[0014] Preferably, the tapered section and the tapered surface satisfy any one or a combination of the following conditions: the maximum diameter of the tapered section is not greater than the maximum diameter of the tapered surface; the minimum diameter of the tapered section is not greater than the minimum diameter of the tapered surface; the oblique angle of the outer circumferential surface of the tapered section relative to the abutment plane is the same as the oblique angle of the tapered surface relative to the radial plane.

[0015] Preferably, the stepped surface further comprises a platform surface extending radially from the radially inner edge of the tapered surface, and the protrusion has a frustum surface extending radially from the radially inner edge of the outer circumferential surface of the tapered section, the frustum surface being adapted to and abuttingly connected to the platform surface.

[0016] Preferably, the abutment plane and the radial plane and / or the protrusion and the recess are tightly connected by welding.

[0017] Preferably, the welding is laser welding, and the laser beam of the laser welding is incident along the radial direction of the shell and penetrates through the shell to the shell cover.

[0018] The present application also provides a compressor, wherein the upper shell cover and / or the lower shell cover of the compressor is assembled with the shell by using the assembly structure of the compressor shell cover and the shell as described above.

[0019] Compared with the prior art, the present application has significant progress:

[0020] The compressor cover and housing assembly structure of the present invention features a flat, plate-shaped cover with a mating plane and a protrusion formed on the inner side of the cover at the outer periphery, forming a stepped cover without folded edges. This eliminates the need for a cover stretching and flanging structure and process. Meanwhile, a radial plane and a recess are formed on the axial end face of the housing, which are respectively adapted to the mating plane and the protrusion on the inner side of the cover for meshing assembly. For the compressor's upper cover, the assembly structure of the compressor cover and housing of this invention, through the flattened plate design of the cover, significantly reduces the distance from the inner side of the cover to the upper end face of the motor core. Simultaneously, it increases the distance between the circumferential weld of the cover and housing's axial end face contact point and the motor winding, reducing heat transfer. Compared to existing external cover and housing assembly structures, with the same distance from the inner top surface (inner side of the cover) to the upper end face of the motor core, the assembly structure of the compressor cover and housing of this invention allows the axial end face contact point of the cover and housing to be further away from the motor winding, thus providing a greater electrical safety distance, while still allowing for further height reduction. For the compressor's upper cover, the assembly structure of the compressor cover and housing of this invention, through the flattened plate design of the cover, significantly reduces the distance from the center of the suction pipe seat ring at the bottom of the housing to the outer bottom surface of the cover, lowering the overall height. At the same time, it increases the distance from the center of the suction pipe seat ring to the lower end face of the housing, avoiding deformation of the lower end face of the housing caused by punching holes before pressure welding the suction pipe seat ring. Therefore, the assembly structure of the compressor cover and housing of the present invention can effectively reduce the overall height of the compressor. In addition, the flat, plate-shaped cover does not require bending, and the rigidity and lightness can be increased by appropriately increasing the thickness, thereby reducing the leakage rate of high pressure pulsation; the flat, plate-shaped cover of the upper cover also increases the large surface area of ​​the upper cover, which is beneficial for the configuration and installation space of high-level waterproof and dustproof seals for the terminals. Attached Figure Description

[0021] Figure 1a is a schematic diagram of the split structure of the insert-type upper cover and the housing in the prior art.

[0022] Figure 1b is a schematic diagram of the assembly of the insert-type upper cover and the housing shown in Figure 1a.

[0023] Figure 1c is a magnified view of a portion of Figure 1b.

[0024] Figure 2a is a schematic diagram of the separation of the outer cover and the shell in the prior art.

[0025] Figure 2b is a schematic diagram of the assembly of the outer cover and the housing shown in Figure 2a.

[0026] Figure 3a is a schematic diagram of the assembly structure of the existing insert-type upper cover and housing, which is sealed and fastened by laser welding.

[0027] Figure 3b is a schematic diagram of the assembly structure of the outer package type upper shell cover and the shell of the prior art using laser welding sealing fastening.

[0028] Figure 4a is a schematic diagram of the assembly of the outer package type lower shell cover and the shell of the prior art.

[0029] Figure 4b is a schematic diagram of the assembly of the inner insertion type lower shell cover and the shell of the prior art.

[0030] Figure 5 is a schematic diagram of the assembly structure of the compressor shell cover and the shell of the embodiment one of the present application.

[0031] Figure 6 is a schematic diagram of the assembly structure of the compressor shell cover and the shell of the embodiment one of the present application.

[0032] Figure 7 is a schematic diagram of the assembly structure of the compressor shell cover and the shell of the embodiment one of the present application using laser welding sealing fastening after installation.

[0033] Figure 8 is a schematic diagram of the diameter size of the shell cover and the shell in the assembly structure of the compressor shell cover and the shell of the embodiment one of the present application.

[0034] Figure 9 is a schematic diagram of the assembly structure of the compressor shell cover and the shell of the embodiment one of the present application.

[0035] Figure 10 is a schematic diagram of the assembly structure of the compressor shell cover and the shell of the embodiment one of the present application.

[0036] Figure 11 is a schematic diagram of the assembly structure of the compressor shell cover and the shell of the embodiment two of the present application.

[0037] Figure 12 is a schematic diagram of the assembly structure of the compressor shell cover and the shell of the embodiment two of the present application.

[0038] Figure 13 is a schematic diagram of the assembly structure of the compressor shell cover and the shell of the embodiment three of the present application.

[0039] Wherein, the reference signs are explained as follows: 01 upper shell cover 01' lower shell cover 02 shell 03 motor 04 motor winding 05 electric arc welding 06 laser welding 07 air suction pipe seat ring 1 shell cover 10 protrusion 101 conical section 102 conical surface 11 butt joint plane 2 shell 20 concave platform 21 radial plane 22 stepped surface 221 conical surface 222 platform surface 3 circumferential welding DETAILED DESCRIPTION

[0040] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate the present application, and are not intended to limit the present application.

[0041] In the description of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] Furthermore, in the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0044] Embodiment One

[0045] As shown in FIGS. 5-10, the first embodiment of the assembly structure of the compressor shell cover and shell provided by the present application. The assembly structure of the compressor shell cover and shell of the present application can be used for the assembly between the upper shell cover and the shell of the compressor, and can also be used for the assembly between the lower shell cover and the shell of the compressor, i.e. the compressor shell cover can be the upper shell cover and / or the lower shell cover of the compressor. In this embodiment one, the shell cover is taken as the upper shell cover of the compressor for example.

[0046] Referring to FIGS. 5, 6 and 7, the assembly structure of the compressor shell cover and shell of this embodiment one comprises a shell cover 1 and a shell 2, the shell 2 has an annular axial end face forming an end opening of the shell 2, and the shell cover 1 is installed on the axial end face of the shell 2 to close the end opening of the shell 2. Taking the shell cover 1 as the upper shell cover of the compressor for example, the upper end of the shell 2 has an annular axial end face forming an upper end opening of the shell 2, and the shell cover 1 is installed on the axial end face of the upper end of the shell 2 as the upper shell cover to close the upper end opening of the shell 2.

[0047] In this embodiment one, the axial end face of the shell 2 is divided into a radial outer side portion away from the axis of the shell 2 and a radial inner side portion close to the axis of the shell 2. The radial outer side portion of the axial end face of the shell 2 is a radial plane 21, i.e. a plane perpendicular to the axis of the shell 2 and extending along the radial direction of the shell 2, and the radial plane 21 is annular. The radial inner side portion of the axial end face of the shell 2 is a stepped face 22 forming a recess 20 from the radial plane 21 towards the middle portion of the shell 2, and the stepped face 22 is annular, so that the recess 20 is annular. The shell cover 1 is flat, and the shell cover 1 has an inner side face facing the axial end face of the shell 2, and the outer periphery of the inner side face of the shell cover 1 is an abutting plane 11 adapted to and abuttingly connected with the radial plane 21 on the axial end face of the shell 2, so that the abutting plane 11 is annular and is a plane perpendicular to the axis of the shell cover 1 and extending along the radial direction of the shell cover 1. The inner side face of the shell cover 1 is provided with a protrusion 10 on the radial inner side of the abutting plane 11, which is adapted to and engaged with the recess 20 on the axial end face of the shell 2. During assembly, the inner side face of the shell cover 1 is abutted with the axial end face of the shell 2, so that the abutting plane 11 on the inner side face of the shell cover 1 is abuttingly connected with the radial plane 21 on the axial end face of the shell 2, and the protrusion 10 on the inner side face of the shell cover 1 is engaged with the recess 20 on the axial end face of the shell 2, thereby realizing the installation and assembly of the shell cover 1 and the shell 2. After the installation of the shell cover 1 and the shell 2, circumferential welding can be performed to tightly and fixedly connect them.

[0048] The assembly structure of the compressor shell cover and the shell of the first embodiment is that the shell cover 1 is designed in a flat plate shape, and the butt joint plane 11 and the protrusion 10 are formed on the inner side surface of the shell cover 1, thereby forming a stepless shell cover without a stretch flange structure and process. Meanwhile, the radial plane 21 and the recess 20 are formed on the axial end surface of the shell 2, and are matched with the butt joint plane 11 and the protrusion 10 on the inner side surface of the shell cover 1 for engagement assembly. For the upper shell cover of the compressor, the assembly structure of the compressor shell cover and the shell of the first embodiment can significantly reduce the distance H5 from the inner side surface of the shell cover 1 to the upper end surface of the motor 03 core, and increase the distance from the fitting position of the axial end surfaces of the shell cover 1 and the shell 2 to the motor winding 04, thereby reducing heat transfer. Compared with the existing assembly structure of the outer package type upper shell cover and the shell shown in FIG. 2b, the assembly structure of the compressor shell cover and the shell of the first embodiment can make the fitting position of the axial end surfaces of the shell cover 1 and the shell 2 farther away from the motor winding 04, that is, has a larger electrical safety distance L2, and still has a space for further height reduction. Therefore, the assembly structure of the compressor shell cover and the shell of the first embodiment can effectively realize the height reduction of the compressor. In addition, the shell cover 1 designed in a flat plate shape does not need to be bent, and the rigidity and lightness can be increased by appropriately increasing the thickness, thereby reducing the leakage rate of high pressure pulsation. The flat plate design of the shell cover 1 also increases the large plane of the upper shell cover, which is beneficial to the configuration and installation space of the high-level waterproof and dustproof sealing of the terminal post.

[0049] Referring to FIG. 8, in the first embodiment, preferably, the outer diameter of the shell cover 1 is equal to the outer diameter of the shell 2, both of which are ΦD, so that the outer circumferential surfaces of the shell cover 1 and the shell 2 are located on the same circumferential surface after installation, thereby ensuring the appearance.

[0050] Referring to FIG. 9, in the first embodiment, preferably, the radial width A1 of the butt joint plane 11 on the inner side surface of the shell cover 1 is equal to the radial width A2 of the radial plane 21 on the axial end surface of the shell 2, so as to ensure the contact area of the butt joint and make the protrusion 10 on the inner side surface of the shell cover 1 in contact with the recess 20 on the axial end surface of the shell 2.

[0051] Preferably, the recess 20 on the axial end surface of the shell 2 and the protrusion 10 on the inner side surface of the shell cover 1 are each formed with one or more steps, and the one or more steps of the protrusion 10 are matched and engaged with the one or more steps of the recess 20 one by one. That is, at least two steps are formed between the axial end surface of the shell 2 and the inner side surface of the shell cover 1.

[0052] In the first embodiment, preferably, the stepped surface 22 of the axial end surface of the housing 2 has at least one tapered surface 221 extending obliquely from the radially inner edge of the radial plane 21 toward the middle of the housing 2, and the protrusion 10 on the inner side surface of the shell cover 1 has a tapered section 101 connected to the radially inner edge of the abutting plane 11, and the outer peripheral surface of the tapered section 101 is adapted to the tapered surface 221. The tapered surface 221 and the tapered section 101 form a tapered stepped surface, which is advantageous for increasing the contact area of the protrusion 10 on the inner side surface of the shell cover 1 with the recessed stepped surface 20 on the axial end surface of the housing 2.

[0053] In the first embodiment, preferably, the size relationship between the tapered section 101 of the protrusion 10 on the inner side surface of the shell cover 1 and the tapered surface 221 of the stepped surface 22 of the axial end surface of the housing 2 satisfies any one or a combination of the following conditions: the maximum diameter ΦD1 of the tapered section 101 is not greater than the maximum diameter ΦD2 of the tapered surface 221; the minimum diameter Φd1 of the tapered section 101 is not greater than the minimum diameter Φd2 of the tapered surface 221; and the inclination angle θ1 of the outer peripheral surface of the tapered section 101 relative to the abutting plane 11 is the same as the inclination angle θ2 of the tapered surface 221 relative to the radial plane 21.

[0054] Further, the stepped surface 22 of the axial end surface of the housing 2 further includes a platform surface 222 extending radially from the radially inner edge of the tapered surface 221, and the protrusion 10 on the inner side surface of the shell cover 1 has a frustoconical surface 102 extending radially from the radially inner edge of the outer peripheral surface of the tapered section 101, and the frustoconical surface 102 is adapted to and in contact with the platform surface 222.

[0055] In a preferred embodiment, referring to FIG. 9 and FIG. 10, the radial width A1 of the abutment plane 11 on the inner side surface of the shell cover 1 is equal to the radial width A2 of the radial plane 21 on the axial end surface of the shell 2, the maximum diameter ΦD1 of the tapered section 101 of the protrusion 10 on the inner side surface of the shell cover 1 is equal to the maximum diameter ΦD2 of the tapered surface 221 of the stepped surface 22 of the axial end surface of the shell 2, the minimum diameter Φd1 of the tapered section 101 is equal to the minimum diameter Φd2 of the tapered surface 221, the inclination angle θ1 of the outer peripheral surface of the tapered section 101 relative to the abutment plane 11 is the same as the inclination angle θ2 of the tapered surface 221 relative to the radial plane 21, the axial extension height T1 of the tapered section 101 is equal to the axial extension height T2 of the tapered surface 221, and the distance B1 between the radially inner edge of the outer peripheral surface of the tapered section 101 and the outer diameter of the shell cover 1 is equal to the distance B2 between the radially inner edge of the tapered surface 221 and the outer diameter of the shell 2. When the stepped surface 22 has a platform surface 222, the platform surface 222 extends radially from the radially inner edge of the tapered surface 221 to the inner diameter of the shell 2, so the distance C between the inner diameter of the shell 2 and the outer diameter of the shell 2 is greater than the distance B2 between the radially inner edge of the tapered surface 221 and the outer diameter of the shell 2. If the stepped surface 22 does not have a platform surface 222, the radially inner edge of the tapered surface 221 extends to the inner diameter of the shell 2, and the distance between the inner diameter of the shell 2 and the outer diameter of the shell 2 is equal to the distance between the radially inner edge of the tapered surface 221 and the outer diameter of the shell 2.

[0056] In this embodiment, preferably, the abutment plane 11 on the inner side surface of the shell cover 1 and the radial plane 21 on the axial end surface of the shell 2 are tightly connected by welding, and / or the protrusion 10 on the inner side surface of the shell cover 1 and the recess 20 on the axial end surface of the shell 2 are tightly connected by welding. Referring to FIG. 10, circumferential welding between the abutment plane 11 on the inner side surface of the shell cover 1 and the radial plane 21 on the axial end surface of the shell 2 forms a circumferential weld 3, and circumferential welding between the protrusion 10 on the inner side surface of the shell cover 1 and the recess 20 on the axial end surface of the shell 2, preferably between the frustum surface 102 of the tapered section 101 of the protrusion 10 and the platform surface 222 of the stepped surface 22 of the recess 20, forms a circumferential weld 3. In this embodiment, the number of circumferential welds 3 and the welding positions can be determined according to the number of steps formed between the axial end surface of the shell 2 and the inner side surface of the shell cover 1.

[0057] In this embodiment, preferably, the welding of the circumferential weld 3 is laser welding, and the laser beam of the laser welding is incident along the radial direction of the shell 2 and penetrates the shell 2 to the shell cover 1. With laser circumferential welding, the incident angle of the laser beam is along the radial direction of the shell 2, and after penetrating the shell 2, the laser beam directly reaches the outer diameter of the shell cover 1 or the outer diameter of the protrusion 10 on the inner side surface of the shell cover 1, which facilitates the flow of molten material and the heat transfer resistance after fusion, and is conducive to concentrating heat on the installation and lamination joint of the shell cover 1 and the shell 2, increasing the joint area and joint strength. Moreover, the precision requirement of laser welding can be appropriately reduced while achieving the same effect.

[0058] Embodiment Two

[0059] As shown in Figs. 11 and 12, a second embodiment of the assembly structure of the compressor shell cover and shell provided by the present application is provided. The embodiment two is basically the same as the embodiment one, and the same parts will not be described again. The difference between the embodiment two and the embodiment one is that, in the embodiment two, the radially inner edge of the conical surface 221 of the stepped surface 22 of the axial end surface of the shell 2 extends to the inner diameter of the shell 2, and the stepped surface does not have the platform surface 222 as described in the embodiment one, so that the structure is simplified.

[0060] In the embodiment two, preferably, as shown in Fig. 11, the radial width A1 of the abutment plane 11 on the inner side surface of the shell cover 1 is equal to the radial width A2 of the radial plane 21 on the axial end surface of the shell 2, the maximum diameter ΦD1 of the conical section 101 of the protrusion 10 on the inner side surface of the shell cover 1 is equal to the maximum diameter ΦD2 of the conical surface 221 of the stepped surface 22 of the axial end surface of the shell 2, the minimum diameter Φd1 of the conical section 101 is smaller than the minimum diameter Φd2 of the conical surface 221, the inclination angle θ1 of the outer peripheral surface of the conical section 101 relative to the abutment plane 11 is the same as the inclination angle θ2 of the conical surface 221 relative to the radial plane 21, the axial extension height T1 of the conical section 101 is greater than the axial extension height T2 of the conical surface 221, and the distance B1 between the radially inner edge of the outer peripheral surface of the conical section 101 and the outer diameter of the shell cover 1 is greater than the distance B2 between the radially inner edge of the conical surface 221 and the outer diameter of the shell 2.

[0061] In the embodiment two, as shown in Fig. 12, the circumferential welding between the abutment plane 11 on the inner side surface of the shell cover 1 and the radial plane 21 on the axial end surface of the shell 2 forms a circumferential weld 3, and the circumferential welding between the radially inner edge of the conical surface 221 on the axial end surface of the shell 2 and the outer peripheral surface of the conical section 101 of the protrusion 10 on the inner side surface of the shell cover 1 forms a circumferential weld 3.

[0062] Embodiment Three

[0063] As shown in Fig. 13, a third embodiment of the assembly structure of the compressor shell cover and shell provided by the present application is provided. The embodiment three is basically the same as the embodiment one, and the same parts will not be described again. The difference between the embodiment three and the embodiment one is that, in the embodiment three, the shell cover 1 is the lower shell cover of the compressor, i.e. the assembly structure of the compressor shell cover and shell provided by the present application is used for the assembly between the lower shell cover and the shell of the compressor. When used for the assembly between the lower shell cover and the shell, the lower end of the shell 2 has an annular axial end surface forming a lower end opening of the shell 2, and the shell cover 1 is installed on the axial end surface of the lower end of the shell 2 as the lower shell cover to close the lower end opening of the shell 2.

[0064] Of course, the assembly structure of the compressor shell cover and shell of the embodiment three can also be the assembly structure of the compressor shell cover and shell of the above-mentioned embodiment two applied to the assembly between the lower shell cover and the shell of the compressor.

[0065] For the upper shell cover of the compressor, the assembly structure of the compressor shell cover and shell of the third embodiment is adopted, and the distance H6 from the center of the suction pipe seat ring 07 of the lower part of the shell 2 to the outer bottom surface of the shell cover 1 can be significantly reduced by the flat plate design of the shell cover 1, the height of the whole machine is reduced, and the distance h3 from the center of the suction pipe seat ring 07 to the lower end surface of the shell 2 is increased, avoiding the deformation of the lower end surface of the shell 2 caused by the punching before the inner pressure welding of the suction pipe seat ring 07. Therefore, the assembly structure of the compressor shell cover and shell of the first embodiment can effectively realize the height reduction of the compressor. Compared with the assembly structure of the existing outer package type and inner insertion type lower shell cover and shell as shown in FIGS. 4a and 4b, the assembly structure of the compressor shell cover and shell of the third embodiment can realize the maximum distance h3 from the center of the suction pipe seat ring 07 to the lower end surface of the shell 2 (h3>h2>h1), and the minimum distance H6 from the center of the suction pipe seat ring 07 to the outer bottom surface of the shell cover 1 (H6<H4<3). Therefore, the assembly structure of the compressor shell cover and shell of the third embodiment is optimal in avoiding the deformation of the lower end surface of the shell 2 by the suction pipe seat ring 07 and reducing the height of the compressor.

[0066] Embodiment four

[0067] The fourth embodiment provides an embodiment of the compressor of the present application. The compressor of the fourth embodiment adopts the assembly structure of the compressor shell cover and shell of the present application, specifically, the assembly of the upper shell cover and / or the lower shell cover of the compressor and the shell adopts any one of the assembly structures of the compressor shell cover and shell in the above-mentioned first to third embodiments of the present application.

[0068] The above-mentioned is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, several improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A compressor case cover and case assembly structure, characterized by, The compressor shell cover (1) and the shell body (2) are provided with a ring-shaped axial end face, the radially outer side of the axial end face is a radial plane (21), the radially inner side of the axial end face is a stepped surface (22) which forms a recess (20) by sinking from the radial plane (21) to the middle of the shell body (2); the shell cover (1) is flat, the inner side of the shell cover (1) has an outer periphery which is an abutting plane (11) matched with the radial plane (21), and the inner side is provided with a protrusion (10) matched with the recess (20) on the radially inner side of the abutting plane (11).

2. The compressor shell cover and shell assembly structure according to claim 1, characterized by, The outer diameter of the shell cover (1) is equal to the outer diameter of the shell body (2).

3. The compressor shell cover and shell assembly structure according to claim 1, wherein The radial width of the abutting plane (11) is equal to the radial width of the radial plane (21).

4. The compressor shell cover and shell assembly structure according to claim 1, wherein The recess (20) and the protrusion (10) are each formed with one or more steps, and the one or more steps of the protrusion (10) are matched and engaged with the one or more steps of the recess (20) one by one.

5. The compressor shell cover and shell assembly structure according to claim 1, wherein The stepped surface (22) has at least one tapered surface (221) which extends from the radially inner edge of the radial plane (21) to the middle of the shell body (2), and the protrusion (10) has a tapered section (101) connected with the radially inner edge of the abutting plane (11), and the outer peripheral surface of the tapered section (101) is matched with the tapered surface (221).

6. The compressor shell cover and shell assembly structure according to claim 5, wherein The size relationship between the tapered section (101) and the tapered surface (221) satisfies any one or a combination of the following conditions: The maximum diameter of the tapered section (101) is not greater than the maximum diameter of the tapered surface (221); The minimum diameter of the tapered section (101) is not greater than the minimum diameter of the tapered surface (221); The inclination angle of the outer peripheral surface of the tapered section (101) relative to the abutting plane (11) is the same as the inclination angle of the tapered surface (221) relative to the radial plane (21).

7. The compressor shell cover and shell assembly structure according to claim 5, wherein The stepped surface (22) further includes a platform surface (222) extending radially from the radially inner edge of the tapered surface (221), and the protrusion (10) has a frustum surface (102) extending radially from the radially inner edge of the outer peripheral surface of the tapered section (101), and the frustum surface (102) is matched and abuts with the platform surface (222).

8. The compressor shell cover and shell assembly structure according to claim 1, wherein The abutting plane (11) and the radial plane (21) and / or the protrusion (10) and the recess (20) are tightly connected by welding.

9. The compressor shell cover and shell assembly structure according to claim 8, wherein The welding is laser welding, and the laser beam of the laser welding is incident along the radial direction of the shell body (2) and penetrates the shell body (2) to the shell cover (1).

10. A compressor characterized by, The assembly of the upper shell cover and / or the lower shell cover of the compressor and the shell body (2) adopts the assembly structure of the compressor shell cover and the shell body as claimed in any one of claims 1 to 9.

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