Compressor upper shell and compressor

Abstract

The utility model relates to the technical field of compressors, and discloses an upper shell of a compressor. The compressor upper shell comprises a top cover, an exhaust pipe joint hole and a connecting column joint hole, the top cover comprises a spherical area and a plane area, the spherical area protrudes towards the outer side of the upper shell in a spherical mode, and the spherical area is connected with the plane area; wherein the top cover is provided with an exhaust pipe joint hole and a connecting column joint hole, the exhaust pipe joint hole is formed in the spherical area or the joint of the spherical area and the plane area, and the connecting column joint hole is formed in the plane area. The top cover of the upper shell is provided with the spherical area, so that the stress distribution on the surface of the upper shell is more uniform, and local stress concentration is reduced. The exhaust pipe joint hole occupies the spherical area, so that the top cover can correspondingly reduce the area of the plane area and increase the area of the spherical area. Stress distribution of the upper shell can be improved by increasing the spherical area, fluctuation of pressure pulse of the upper shell is improved, vibration and noise are reduced, and the operation stability of the compressor is improved. The utility model further discloses the compressor.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a compressor upper shell and a compressor. Background Art

[0002] With the continuous expansion of the application scenarios of variable frequency compressors, the operating frequency of the compressor changes due to the changes in the working conditions of the application scenarios, and the pressure pulsation inside the compressor housing also changes accordingly with the compressor frequency. The upper housing of the compressor housing needs to be welded with exhaust pipes and terminals, which makes the force distribution on the upper housing surface uneven, causing changes in the pressure pulsation inside the housing.

[0003] The related technology provides an upper shell for a compressor, the upper shell includes a bottom shell portion and a top shell portion, the upper wall surface of the bottom shell portion is formed as an ellipsoidal surface protruding upward, the bottom of the bottom shell portion is open, the top shell portion is arranged on the bottom shell portion, the top shell portion protrudes upward from the upper wall surface of the bottom shell portion, the upper wall surface of the top shell portion is formed as a plane parallel to the lower end surface of the bottom shell portion, the terminal mounting hole and the exhaust pipe mounting hole are arranged on the upper wall surface of the top shell portion, and the upper wall surface of the bottom shell portion is formed as an ellipsoidal surface, so that the upper shell has a higher natural frequency, which can improve the noise problem of the compressor.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] In the related art, the terminal mounting holes and the exhaust pipe mounting holes are both arranged on the upper wall surface of the top shell, which requires occupying a larger plane area. The larger plane area of ​​the top shell has a greater impact on the air flow pulsation inside the shell, resulting in uneven force distribution on the upper shell surface.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a compressor upper shell and a compressor to improve the force distribution of the upper shell and enhance the operating stability of the compressor.

[0009] According to the first aspect of the embodiments of the present utility model, a compressor upper housing is provided, including: a top cover, including a spherical region and a planar region, the spherical region protruding spherically towards the outside of the upper housing, and the spherical region being connected to the planar region; wherein, the top cover is provided with an exhaust pipe joint hole and a connecting column joint hole, the exhaust pipe joint hole is arranged in the spherical region or at the connection of the spherical region and the planar region, and the connecting column joint hole is arranged in the planar region.

[0010] Optionally, the outer surface of the planar region is lower than the outer surface of the spherical region, so that the planar region forms a depression relative to the spherical region.

[0011] Optionally, the depression depth of the surface of the planar region relative to the exhaust pipe joint hole is h, and the wall thickness of the upper housing is t, where 0 < h / t ≤ 1.

[0012] Optionally, along the axial direction of the upper housing, the ratio of the projected area of the spherical region to the projected area of the planar region is greater than or equal to 2.

[0013] Optionally, the planar region is provided with reinforcing ribs, the reinforcing ribs protruding towards the inside of the upper housing, and the reinforcing ribs are arranged corresponding to the connection post joint holes; in the case where the number of the reinforcing ribs is multiple, the multiple reinforcing ribs are circumferentially distributed along the connection post joint holes.

[0014] Optionally, the width of the reinforcing rib is w, and the wall thickness of the upper housing is t, where 0 < w / t ≤ 1; and / or, a depression is formed between the reinforcing rib and the outer surface of the planar region, the depression depth of the reinforcing rib is H, and the wall thickness of the upper housing is t, where 0 < H / t ≤ 1.

[0015] Optionally, the compressor upper housing further includes: a transition portion, extending circumferentially along the top cover and protruding in an arc towards the outside of the upper housing, one end of the transition portion being connected to the outer edge of the spherical region; an assembly portion, extending circumferentially along the top cover, connected to the end of the transition portion背离 the top cover or connected to the end of the transition portion背离 the top cover and the outer edge of the planar region, and being adapted to be assembled with the middle housing of the compressor; wherein, along the axial direction of the upper housing, the top cover, the transition portion, and the assembly portion are arranged in sequence.

[0016] Optionally, the arc radius of the transition portion is greater than or equal to 6 mm.

[0017] According to the second aspect of the embodiments of the present utility model, a compressor is provided, including the compressor upper housing according to any one of the above embodiments.

[0018] Optionally, the compressor further includes: a middle housing, coaxially connected to the upper housing; wherein, the spherical radius of the spherical region is SR, and the radius of the middle housing is R, where 1 ≤ SR / R ≤ 8.

[0019] The compressor upper housing and the compressor provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] The top cover of the upper shell is provided with a spherical area, and the spherical area protrudes spherically toward the outside of the upper shell, which can make the force distribution on the surface of the upper shell corresponding to the spherical area more uniform and reduce local stress concentration. The exhaust pipe joint hole is suitable for connecting with the exhaust pipe, and the connecting column joint hole is suitable for connecting with the connecting column. The exhaust pipe joint hole is arranged in the spherical area or at the connection between the spherical area and the plane area, and the connecting column joint hole is arranged in the plane area. The exhaust pipe joint hole occupies the spherical area, so that the top cover can reduce the area of ​​the plane area accordingly and increase the area of ​​the spherical area, thereby optimizing the ratio of the spherical area of ​​the top cover to the plane area. The use of a larger spherical area can improve the force distribution of the upper shell, thereby improving the fluctuation of the pressure pulse of the upper shell, reducing vibration and noise, and improving the stability of the compressor operation.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a schematic structural diagram of a compressor upper housing provided by an embodiment of the present disclosure;

[0024] Figure 2 is a structural schematic diagram of another compressor upper housing provided by an embodiment of the present disclosure;

[0025] Figure 3 yes Figure 2 The schematic cross-sectional view along the AA direction is shown, wherein the arrow indicates the axial direction of the upper shell;

[0026] Figure 4 is a structural schematic diagram of another compressor upper shell provided by an embodiment of the present disclosure;

[0027] Figure 5 is a cross-sectional schematic diagram of an upper housing of a compressor provided by an embodiment of the present disclosure;

[0028] Figure 6 yes Figure 5 An enlarged schematic diagram of portion B is shown;

[0029] Figure 7 is a structural schematic diagram of another compressor upper shell provided by an embodiment of the present disclosure, wherein arrow D indicates the direction of the internal stress of the upper shell, and arrow E indicates the direction of the prestress of the plane area;

[0030] Figure 8 is a structural schematic diagram of a compressor provided by an embodiment of the present disclosure;

[0031] Fig. 9 yes Figure 8 A schematic cross-sectional view along the CC direction is shown.

[0032] Reference numerals:

[0033] 10: upper shell; 11: top cover; 12: spherical area; 121: projection of spherical area; 13: plane area; 131: projection of plane area; 14: exhaust pipe joint hole; 15: connecting column joint hole; 16: reinforcing rib; 17: transition part; 18: assembly part; 181 assembly boss;

[0034] 20: middle shell;

[0035] 30: Shell. DETAILED DESCRIPTION

[0036] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0037] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate for the disclosed embodiments described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0039] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0040] Unless otherwise stated, the term "plurality" means two or more.

[0041] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0042] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0044] The shell of the compressor is a pressure vessel. The shell of the shell is a cylindrical surface. The maximum stress σ max1 As shown in Formula 1, the maximum stress σ on the spherical surface of the upper shell is max2 As shown in Formula 2, the maximum stress σ in the upper shell plane area is max3 As shown in Formula 3.

[0045] The maximum stress calculation formula of the shell cylindrical surface (Formula 1):

[0046]

[0047] The maximum stress calculation formula of the spherical area of ​​the upper shell (Formula 2):

[0048]

[0049] The maximum stress calculation formula of the upper shell plane area (Formula 3):

[0050]

[0051] in:

[0052] p: air flow pressure; D: shell mean diameter = (shell inner diameter + shell outer diameter) / 2; SD: spherical area middle diameter = (spherical area inner diameter + spherical area outer diameter) / 2; δ: shell thickness or spherical area thickness = (outer diameter - inner diameter) / 2; K: plane shape coefficient, usually K = 0.188~0.31.

[0053] Under the same airflow pressure, when the middle diameter of the shell mid-diameter spherical area is the same, and the shell and spherical area thickness are the same, the maximum stress ratio between the plane area and the spherical area of ​​the upper shell can reach 4KD / δ times. Taking D=101, δ=3, K=0.188 as an example for calculation, the maximum stress ratio between the plane area and the spherical area of ​​the upper shell is 25. According to Newton's third law, the action force is equal to the reaction force, and the upper shell plane area will apply a maximum reaction force of 25 times the upper shell spherical area to the airflow, causing fluctuations in the local airflow pulsation inside the shell. Therefore, reducing the area of ​​the upper shell plane area can reduce the degree of fluctuation of the airflow pulsation inside the shell.

[0054] Theoretically, when the compressor shell is set as a sphere, the force inside the compressor is most uniform, and the air flow pulsation inside the compressor is most stable. However, considering the actual application needs of the compressor, the shell is usually cylindrical. Since the upper shell needs to be equipped with an exhaust pipe and a terminal, a flat area needs to be set on the upper shell, and corresponding exhaust pipe joint holes and terminal joint holes need to be opened.

[0055] Combination Figure 1-7 As shown, the embodiment of the present disclosure provides a compressor upper shell 10, including a top cover 11. The top cover 11 includes a spherical area 12 and a plane area 13, the spherical area 12 protrudes spherically toward the outside of the upper shell 10, and the spherical area 12 is connected to the plane area 13; wherein, the top cover 11 is provided with an exhaust pipe joint hole 14 and a connecting column joint hole 15, the exhaust pipe joint hole 14 is provided in the spherical area 12 or at the connection between the spherical area 12 and the plane area 13, and the connecting column joint hole 15 is provided in the plane area 13.

[0056] The top cover 11 of the upper shell 10 is provided with a spherical area 12, which is spherically protruding toward the outside of the upper shell 10, so that the force distribution on the surface of the upper shell 10 corresponding to the spherical area 12 is more uniform, reducing local stress concentration. Compared with the ellipsoidal surface, the stress distribution of the spherical surface is more uniform. The plane area 13 is a necessary installation plane for assembly in the upper shell 10.

[0057] The connecting post joint hole 15 is used to assemble the connecting post to the upper housing 10. Since the electrical protection element needs to be assembled at the terminal post, the connecting post joint hole 15 requires a large area of ​​the joint plane. The terminal post joint portion is arranged in the plane area 13, which can provide a sufficient assembly plane for the terminal post. Thus, the terminal post can be assembled stably and the reliability of the electrical connection can be improved.

[0058] The exhaust pipe joint hole 14 is used to assemble the exhaust pipe to the upper shell 10. The area of ​​the joint plane required by the exhaust pipe joint hole 14 is relatively small. The exhaust pipe joint hole 14 is arranged in the spherical area 12 to meet the assembly requirements of the exhaust pipe joint hole 14. In the embodiment of the present disclosure, the exhaust pipe joint hole 14 is arranged in the spherical area 12 or at the connection between the spherical area 12 and the plane area 13, so that at least part of the exhaust pipe joint hole is arranged in the spherical area 12, which can reduce the occupation of the exhaust pipe joint hole 14 on the plane area 13. In this way, the area of ​​the plane area 13 can be reduced accordingly, and the area of ​​the spherical area 12 can be increased, thereby improving the force distribution of the plane area 13.

[0059] With the compressor upper shell 10 provided by the embodiment of the present disclosure, the exhaust pipe joint hole 14 is provided in the spherical area 12 or at the connection between the spherical area 12 and the plane area 13, and the connecting column joint hole 15 is provided in the plane area 13. The exhaust pipe joint hole 14 occupies the spherical area 12, so that the top cover 11 can reduce the area of ​​the plane area 13 accordingly and increase the area of ​​the spherical area 12, thereby optimizing the ratio of the spherical area 12 to the plane area 13 of the top cover 11. The use of a larger area of ​​the spherical area 12 can improve the force distribution of the upper shell 10, thereby improving the fluctuation of the pressure pulse of the upper shell 10, reducing vibration and noise, and improving the stability of the compressor operation.

[0060] Optionally, combined Figure 1-2 As shown, the plane region 13 is located at one end of the spherical region 12 along the radial direction of the upper housing 10 .

[0061] By arranging the plane area 13 along the radial direction of the upper shell 10 at one end of the spherical area 12 along the radial direction of the upper shell 10, the spherical protrusion of the spherical area 12 can be made more complete, so that the stress is more evenly distributed in the spherical area 12, thereby reducing stress concentration.

[0062] Optionally, combined Figure 1-4 As shown, the outer surface of the plane region 13 is lower than the outer surface of the spherical region 12 , so that the plane region 13 is recessed relative to the spherical region 12 .

[0063] The plane area 13 is concave relative to the spherical area 12, which is equivalent to forming a prestress on the plane area 13 toward the inner side of the upper shell 10. The stress direction in the shell 30 of the upper shell 10 is as follows: Figure 7 As shown by the arrow D in the middle, the direction of the prestressing force in the plane area 13 is as follows: Figure 7 As shown by arrow E.

[0064] When the compressor is running, the upper housing 10 is subjected to an outward pressure from the inside, and the inner surface of the upper housing 10 is the high-pressure side. The planar region 13 forms a depression relative to the spherical region 12, constituting a concave structure, which is equivalent to pre-applying a force from the outside to the inside in the planar region 13. It can more effectively resist the outward pressure received by the planar region 13, thereby increasing the stress-bearing strength of the planar region 13 against the internal pressure of the housing 30 and enhancing the stability of the upper housing 10. The connecting column engaging hole 15 is provided in the planar region 13, which can improve the connection strength of the connecting column and enhance the firmness of the connection between the connecting column and the upper housing 10.

[0065] Optionally, there is a smooth transition between the spherical region 12 and the planar region 13.

[0066] The smooth transition between the spherical region 12 and the planar region 13 can reduce stress concentration, improve the structural strength of the top cover 11, avoid damage at the connection between the spherical region 12 and the planar region 13, and enable the upper housing 10 to better withstand the internal pressure generated during the operation of the compressor.

[0067] Optionally, as shown in Figure 3 , the depression depth of the surface of the planar region 13 relative to the exhaust pipe engaging hole 14 is h, and the wall thickness of the upper housing 10 is t, where 0 < h / t ≤ 1.

[0068] The wall thickness of each part of the upper housing 10 is set to the same thickness. The wall thickness of the top cover 11 is the same as that of the upper housing 10, and the wall thicknesses of the spherical region 12 and the planar region 13 of the top cover 11 are the same.

[0069] When the ratio of the depression depth h to the wall thickness t of the upper housing 10 is 0 < h / t ≤ 1, the depression depth h of the planar region 13 is less than or equal to the wall thickness t of the upper housing 10, which can increase the stress-bearing strength of the planar region 13 and improve the stress distribution of the planar region 13. When the depression is formed by a stamping process, the depression depth of the planar region 13 being less than or equal to the thickness of the upper housing 10 can avoid an increase in processing difficulty.

[0070] It can be understood that h / t can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1.

[0071] Optionally, as shown in Figure 4 , along the axial direction of the upper housing 10, the ratio of the projected area 121 of the spherical region to the projected area 131 of the planar region is greater than or equal to 2.

[0072] The axial direction of the upper housing 10 is as shown by the arrow direction in Figure 3 .

[0073] As shown in Figure 4As shown, along the axial direction of the upper shell 10 , the spherical area projection 121 is the projection of the radial section of the spherical area 12 , and the plane area projection 131 is the projection of the radial section of the plane area 13 .

[0074] The ratio of the area of ​​the spherical area projection 121 to the area of ​​the plane area projection 131 is greater than or equal to 2, so that the upper shell 10 has a sufficient spherical area 12, and a spherical protrusion with a larger area is formed on the upper shell 10, which can more effectively improve the uniformity of the surface stress distribution of the upper shell 10, improve the surface force of the upper shell 10, and reduce local stress concentration. It can also improve the overall strength and rigidity of the structure of the upper shell 10, thereby improving the structural stability of the upper shell 10.

[0075] Optionally, combined Figure 1-2 and Figure 5-6 As shown, the plane area 13 is provided with a reinforcing rib 16, which protrudes toward the inner side of the upper shell 10, and the reinforcing rib 16 is arranged corresponding to the terminal joint hole; when there are multiple reinforcing ribs 16, the multiple reinforcing ribs 16 are distributed circumferentially along the terminal joint hole.

[0076] The terminal joint hole can fix the terminal to the top cover 11, and the provision of the reinforcing rib 16 can prevent the strength of the plane area 13 corresponding to the opening circumference of the terminal joint hole from being weakened, avoid plane deformation, warping of the opening circumference, etc., enhance the structural strength of the plane area 13 around the terminal joint hole, and improve the force distribution at the terminal joint.

[0077] The reinforcing ribs 16 protrude toward the inner side of the upper shell 10, which can more effectively disperse the force, reduce the stress concentration at the terminal joint hole, and thus reduce the local stress. When multiple reinforcing ribs 16 are distributed circumferentially along the terminal joint hole, the structural strength of the planar area 13 around the terminal can be increased, and the reliability of the terminal assembly can be improved. At the same time, the reinforcing ribs 16 protrude toward the inner side of the upper shell 10, which can also resist the stress from the inside of the upper shell 10, enhance the support and reinforcement effect of the connection post joint hole 15, and make the planar area 13 where the terminal joint hole is located less likely to deform when subjected to force.

[0078] When there are multiple reinforcing ribs 16, the reinforcing ribs 16 are distributed circumferentially along the terminal joint hole, which can more effectively disperse the stress and reduce local stress concentration.

[0079] Optionally, the connection post engagement hole 15 comprises a terminal post welding hole.

[0080] The terminal engaging hole enables the terminal to be fixed to the top cover 11 by welding and forms a stable electrical connection path.

[0081] Optionally, the cross-section obtained by cutting the reinforcing rib 16 with a plane parallel to the radial direction of the upper housing 10 includes at least one of a kidney shape, a circular shape, and a rectangular shape.

[0082] The kidney shape, circular shape, and rectangular shape structures can all distribute stress more evenly and enhance the local load-bearing capacity. The shape of the reinforcing rib 16 is not limited in this application.

[0083] Optionally, the reinforcing rib 16 is a continuous structure or an intermittent structure.

[0084] When the reinforcing rib 16 is a continuous structure, it can improve the structural rigidity and provide uniform support over a larger range. When the reinforcing rib 16 is an intermittent structure, the intermittent reinforcing rib 16 can be used in the stress concentration area to provide local stress relief and can also reduce costs.

[0085] Optionally, the exhaust pipe joint hole 14 includes an exhaust pipe welding hole.

[0086] The exhaust pipe is welded to the top cover 11 by welding, which can improve the sealing performance between the exhaust pipe and the top cover 11. The exhaust pipe is connected to the exhaust pipe welding hole and is used for the exhaust of the compressor.

[0087] Optionally, as shown in Figure 6 the width of the reinforcing rib is w, the wall thickness of the upper housing is t, and 0 < w / t ≤ 1.

[0088] When 0 < w / t ≤ 1, the width of the reinforcing rib 16 is less than or equal to the wall thickness of the upper housing 10, which can avoid or reduce the influence of the depression of the reinforcing rib 16 on the structural strength of the plane area 13.

[0089] It can be understood that w / t can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1, etc.

[0090] Optionally, as shown in Figure 6 a depression is formed between the reinforcing rib and the outer surface of the plane area, the depression depth of the reinforcing rib is H, the wall thickness of the upper housing is t, and 0 < H / t ≤ 1.

[0091] A depression is formed between the reinforcing rib 16 and the outer surface of the plane area 13 to form an inwardly concave reinforcing rib 16. When 0 < H / t ≤ 1, the depression depth of the reinforcing rib 16 is less than or equal to the wall thickness of the upper housing 10, which can increase the structural strength of the plane area 13. In the case where multiple reinforcing ribs 16 are distributed circumferentially along the terminal welding hole, it can more effectively improve the overall rigidity of the plane area 13 and increase the stress-bearing strength of the plane area 13. When the depression of the reinforcing rib 16 is formed by a stamping process, the depression depth of the reinforcing rib 16 is less than or equal to the thickness of the upper housing 10, which can avoid an increase in processing difficulty.

[0092] It will be appreciated that H / t may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or 1, etc.

[0093] Optionally, combined Figure 1-3 As shown, the compressor upper shell 10 also includes a transition portion 17 and an assembly portion 18. The transition portion 17 extends circumferentially along the top cover 11 and protrudes in a circular arc toward the outer side of the upper shell 10. One end of the transition portion 17 is connected to the outer edge of the spherical area 12; the assembly portion 18 extends circumferentially along the top cover 11, is connected to the end of the transition portion 17 away from the top cover 11, or is connected to the end of the transition portion 17 away from the top cover 11 and the outer edge of the plane area 13, and is suitable for assembly with the middle shell 20 of the compressor; wherein, along the axial direction of the upper shell 10, the top cover 11, the transition portion 17 and the assembly portion 18 are arranged in sequence.

[0094] Along the axial direction of the upper shell 10 , the top cover 11 , the transition portion 17 and the assembly portion 18 are arranged in sequence to jointly enclose an inner space of the upper shell 10 .

[0095] The transition portion 17 protrudes in an arc toward the outside of the upper shell 10, which can improve the uniformity of the force distribution of the transition portion 17. The transition portion 17 extends in an arc circumferential direction along the top cover 11, and one end of the transition portion 17 is connected to the outer edge of the spherical area 12, which can form a smooth transition arc, reduce stress concentration, and form a continuous outer surface of the upper shell 10. The stress direction of the transition portion 17 is the same as the stress direction of the spherical area 12, which can effectively disperse the stress. The arc protrusion of the transition portion 17 and the spherical protrusion of the spherical area 12 work together to more effectively increase the stability of the upper shell 10.

[0096] When the spherical region 12 of the top cover 11 is arranged around the plane region 13, the plane region 13 is located in the spherical region 12, and the overall outer edge of the top cover 11 is the outer edge of the spherical region 12. One end of the transition portion 17 is connected to the outer edge of the spherical region 12, that is, one end of the transition portion 17 is connected to the overall outer edge of the top cover 11. At this time, the assembly portion 18 is connected to the end of the transition portion 17 away from the top cover 11, so that the transition portion 17 can form an annular structure along the circumference of the top cover 11, and the assembly portion 18 can form an annular structure along the circumference of the top cover 11, so that the top cover 11, the transition portion 17, and the assembly portion 18 are completely connected around the top cover 11 along the circumference.

[0097] When the plane area 13 is located at one end of the spherical area 12 along the radial direction of the upper shell 10, the overall outer edge of the top cover 11 includes the outer edge of the spherical area 12 and the outer edge of the plane area 13. One end of the transition portion 17 is connected to the outer edge of the spherical area 12. Due to the existence of the outer edge of the plane area 13, the transition portion 17 forms an annular structure with a gap along the circumference of the top cover 11. At this time, the assembly portion 18 is connected to the end of the transition portion 17 away from the top cover 11, and is connected to the outer edge of the plane area 13, so that the assembly portion 18 can form an annular structure along the circumference of the top cover 11, so that the top cover 11, the transition portion 17, and the assembly portion 18 are completely connected around the top cover 11 along the circumference.

[0098] The assembly portion 18 is used for assembly between the upper shell 10 and the middle shell 20 of the compressor. The assembly portion 18 extends along the circumference of the top cover 11 and can be precisely matched and connected with the edge of the top cover 11. The assembly portion 18 can enhance the rigidity of the connection area between the upper shell 10 and the middle shell 20 to resist external loads and internal pressure.

[0099] The wall thickness of the transition portion 17 is consistent with the wall thickness of the mounting portion 18 , that is, the wall thickness of the upper housing 10 .

[0100] Optionally, the assembly portion 18 includes an assembly cylinder, and the diameter of the assembly cylinder is matched with the diameter of the middle housing 20 .

[0101] The middle shell 20 of the compressor is usually a cylindrical shell 30 , and the diameter of the assembly cylinder is matched with the diameter of the middle shell 20 , so that the upper shell 10 and the middle shell 20 can be tightly and accurately connected, thereby improving the stability of the compressor shell 30 .

[0102] Optionally, combined Figure 1-3 As shown, the assembly portion 18 is provided with an assembly boss 181 , so that the assembly portion 18 is assembled with the middle housing 20 of the compressor through the assembly boss 181 .

[0103] The provision of the assembly boss 181 can improve the connection stability between the upper housing 10 and the middle housing 20 .

[0104] Optionally, the arc radius of the transition portion 17 is greater than or equal to 6 mm.

[0105] The arc radius of the transition portion 17 is as follows: Figure 3 As shown in r, that is, when viewed from the longitudinal section of the upper shell 10 along the axial direction, the radius of the inner edge of the transition portion 17 is r.

[0106] The arc radius of the transition portion 17 is greater than or equal to 6 mm. For example, the arc radius of the transition portion 17 may be 6 mm, 7 mm, 8 mm, 9 mm or 10 mm. This can better achieve a smooth transition between the transition portion 17 and the spherical area 12, achieve a more uniform stress distribution, improve the surface stress of the upper shell 10, and reduce stress concentration in the transition portion 17.

[0107] Combination Figure 8 As shown, an embodiment of the present disclosure provides a compressor, including a housing 30 , wherein the housing 30 includes the compressor upper housing 10 as described in any one of the above disclosed embodiments.

[0108] The compressor provided by the embodiment of the present disclosure includes the compressor upper shell 10 as described in any of the above disclosed embodiments, and thus has the compressor upper shell 10 as described in any of the above disclosed embodiments, which can reduce noise, improve operating stability, and improve the overall performance of the compressor.

[0109] Optionally, combined Fig. 9 As shown, the compressor further includes a middle shell 20, which is coaxially connected to the upper shell 10; wherein the spherical radius of the spherical area 12 is SR, the radius of the middle shell 20 is R, and 1≤SR / R≤8.

[0110] The spherical radius of the spherical region 12 is Fig. 9 As shown in SR, that is, when viewed from the longitudinal section of the upper shell 10 along the axial direction, the radius of the inner edge of the spherical area 12 is SR.

[0111] The radius of the middle shell 20 is as follows: Fig. 9 As shown by R in the figure, that is, when viewed from the longitudinal section of the middle shell 20 along the axial direction, the radius of the inner edge of the middle shell 20 is R.

[0112] When the ratio SR / R of the spherical radius of the spherical area 12 to the radius of the middle shell 20 is greater than or equal to 1, the spherical radius of the spherical area 12 is greater than the radius of the middle shell 20, so that the upper shell 10 can have more spherical areas 12, improve the uniformity of stress distribution of the upper shell 10, reduce vibration and noise during operation of the compressor, and also improve the structural strength of the upper shell 10.

[0113] When the ratio SR / R of the spherical radius of the spherical area 12 to the radius of the middle shell 20 is less than or equal to 8, the spherical area 12 can be prevented from being too large, the manufacturing cost can be reduced, and the compactness of the compressor can also be maintained.

[0114] The disclosed embodiment limits the spherical radius size of the spherical area 12 of the upper shell 10 and the radius size of the middle shell 20, so that the force distribution of the upper shell 10 is improved compared with the force distribution of the middle shell 30. Limiting 1≤SR / R≤8 can improve the stability of the compressor operation and the compactness of the internal structure of the compressor.

[0115] It will be appreciated that SR / R may be 1, 2, 3, 4, 5, 6, 7 or 8, etc.

[0116] Optionally, a ratio of a spherical radius SR of the spherical region 12 to a radius R of the middle shell 20 is in the range of 2≤SR / R≤8.

[0117] Increasing the lower limit of SR / R to SR / R≥2 can increase the spherical area 12 of the top cover 11, thereby optimizing the stress distribution of the upper shell 10 and reducing the vibration and noise during the operation of the compressor.

[0118] The upper shell 10 of the compressor provided in the embodiment of the present disclosure is simulated and compared with the upper shell 10 of the existing solution, and the third-order mode of the upper shell 10 and the maximum stress simulation experiment that the upper shell 10 can withstand are performed. The specific experimental data are shown in Table 1. In the existing solution, the top cover 11 of the upper shell 10 is set as a plane, including only the plane area 13. In the embodiment of the present application, the top cover 11 of the upper shell 10 is set as a spherical shape, including a spherical area 12 and a plane area 13. The projection 121 of the spherical area is S sp , the plane area projection 131 is Sp. The ratio S of the spherical area projection 121 and the plane area projection 131 is respectively sp The simulation experiment is carried out with different parameter values ​​of / Sp, the ratio SR / R of the spherical radius and the radius of the middle shell 20.

[0119] Table 1

[0120]

[0121] In implementation mode 1, when S sp When / Sp=2 and SR / R=1, compared with the existing solution, the maximum stress that the upper shell 10 can withstand is improved by 27%, the first-order mode is improved by 42%, the second-order mode is improved by 14%, and the third-order mode is improved by 13%. The maximum stress that the upper shell 10 can withstand and the upper shell mode are both significantly improved.

[0122] In implementation mode 2, when S sp When / Sp=2 and SR / R=8, compared with the existing solution, the maximum stress that the upper shell 10 can withstand is improved by 10%, the first-order mode is improved by 40%, the second-order mode is improved by 13%, and the third-order mode is improved by 12%. The maximum stress that the upper shell 10 can withstand is improved, and the improvement effect of the upper shell mode is obvious.

[0123] In implementation mode 3, when S sp When / Sp=1.9 and SR / R=1, compared with the existing solution, the maximum stress that the upper shell 10 can withstand is increased by 23%, only the first-order mode is improved by 17%, the second-order mode is improved by only 3%, and the third-order mode is improved by only 4%. The maximum stress that the upper shell 10 can withstand is significantly improved, but the improvement of the upper shell mode is limited.

[0124] In implementation mode 4, when S sp When / Sp=1.9 and SR / R=8, compared with the existing solution, the maximum stress that the upper shell 10 can withstand is improved by 7%, the first-order mode is improved by 7%, the second-order mode is only improved by 2%, and the third-order mode is only improved by 2%. The maximum stress that the upper shell 10 can withstand and the improvement of the upper shell mode are both limited.

[0125] As shown in the simulation data in Table 1, sp When / Sp=2 and SR / R=1, the maximum stress that the upper shell 10 can withstand and the upper shell mode are effectively improved. sp When / Sp increases from 1.9 to 2, the maximum stress that the upper shell 10 can withstand and the upper shell mode are improved, among which the improvement of the upper shell mode is more significant. sp When SR / R decreases from 8 to 1 when SR / Sp is the same, the maximum stress that the upper shell 10 can withstand and the upper shell mode are effectively improved, among which the improvement of the maximum stress that the upper shell 10 can withstand is more significant.

[0126] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A compressor upper housing, characterized in that: Comprising: A top cover, including a spherical region and a planar region, the spherical region protruding spherically towards the outside of the upper housing, and the spherical region being connected to the planar region; Among them, the top cover is provided with an exhaust pipe joint hole and a connecting column joint hole, the exhaust pipe joint hole is arranged in the spherical region or at the connection between the spherical region and the planar region, and the connecting column joint hole is arranged in the planar region.

2. The upper housing of the compressor according to claim 1, wherein The outer surface of the planar region is lower than the outer surface of the spherical region, so that the planar region forms a depression relative to the spherical region.

3. The upper housing of the compressor according to claim 2, wherein The depression depth of the surface of the planar region relative to the exhaust pipe joint hole is h, and the wall thickness of the upper housing is t, 0 < h / t ≤ 1.

4. The upper housing of the compressor according to claim 1, wherein Along the axial direction of the upper housing, the ratio of the projected area of the spherical region to the projected area of the planar region is greater than or equal to 2.

5. The upper housing of the compressor according to claim 1, wherein The planar region is provided with reinforcing ribs, the reinforcing ribs protruding towards the inside of the upper housing, and the reinforcing ribs are arranged corresponding to the connecting column joint holes; When the number of the reinforcing ribs is multiple, the multiple reinforcing ribs are circumferentially distributed along the circumference of the connecting column joint holes.

6. The upper housing of the compressor according to claim 5, wherein The width of the reinforcing rib is w, and the wall thickness of the upper housing is t, 0 < w / t ≤ 1; and / or, A depression is formed between the reinforcing rib and the outer surface of the planar region, the depression depth of the reinforcing rib is H, and the wall thickness of the upper housing is t, 0 < H / t ≤ 1.

7. The compressor upper housing according to any one of claims 1 to 6, characterized in that: Further comprising: A transition part, extending along the circumference of the top cover and protruding in an arc towards the outside of the upper housing, one end of the transition part being connected to the outer edge of the spherical region; An assembly part, extending along the circumference of the top cover, connected to the end of the transition part背离 the top cover or connected to the end of the transition part背离 the top cover and the outer edge of the planar region, and being adapted to be assembled with the middle housing of the compressor; Among them, along the axial direction of the upper housing, the top cover, the transition part and the assembly part are arranged in sequence.

8. The upper housing of the compressor according to claim 7, wherein The arc radius of the transition part is greater than or equal to 6 mm.

9. A compressor, characterized in that: Comprising: A housing, including the upper housing of the compressor according to any one of claims 1 to 8.

10. The compressor according to claim 9, characterized in that The housing further comprises: A middle housing, coaxially connected to the upper housing; Among them, the spherical radius of the spherical region is SR, and the radius of the middle housing is R, 1 ≤ SR / R ≤ 8.

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