A pump body assembly, a rotary compressor, and an air conditioner

Abstract

This invention provides a pump body assembly, a rotary compressor, and an air conditioner, including a crankshaft and an upper flange and a lower flange for supporting the crankshaft. The crankshaft includes a long shaft and a short shaft. The outer circular surface of the long shaft is provided with a first outer spherical surface, which includes a first upper spherical surface and a first lower spherical surface. The first outer spherical surface has a first great circle perpendicular to the crankshaft axis, and the first upper spherical surface and the first lower spherical surface are respectively located on the upper and lower sides of the first great circle. The inner hole of the upper flange includes a first inner spherical surface that matches the first outer spherical surface. The outer circular surface of the short shaft is provided with a second outer spherical surface, which includes a second upper spherical surface and a second lower spherical surface. The second outer spherical surface has a second great circle perpendicular to the crankshaft axis, and the second upper spherical surface and the second lower spherical surface are respectively located on the upper and lower sides of the second great circle. The inner hole of the lower flange includes a second inner spherical surface that matches the second outer spherical surface, thereby solving the technical problem in the prior art where stress concentration between the crankshaft and the upper and lower flanges is caused by the crankshaft deflection.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, specifically relating to a pump assembly, a rotary compressor, and an air conditioner. Background Technology

[0002] Currently, the structure of a typical rotary compressor used in air conditioning mainly includes a housing, motor assembly, pump assembly, and distributor assembly, such as... Figure 18-20 As shown, the pump body assembly mainly consists of a crankshaft, upper flange, lower flange, and cylinder. Its operating principle is that the motor drives the crankshaft to rotate, compressing the gas inside the pump body to discharge the high-pressure refrigerant, achieving the final cooling or heating effect. The upper and lower flanges and crankshaft in the pump body assembly, as grinding components, have a crucial impact on frictional power consumption and compressor reliability due to their contact stress state and lubrication performance. In existing rotary compressors, the contact area between the crankshaft and flange is a cylindrical surface contact. Generally, higher contact stress increases frictional power consumption. Furthermore, poor lubrication performance exacerbates wear and reduces reliability. Especially since the crankshaft, as a rotating component, experiences changes in deflection with varying rotational speed, its contact state with the flange also changes, leading to stress concentration. The pattern is that the higher the rotational speed or frequency, the greater the crankshaft deflection, the smaller the contact area, and the more concentrated the stress. This causes a sharp increase in contact stress between the crankshaft and flange, increasing frictional power consumption. Furthermore, increased contact stress also leads to accelerated wear and reduced reliability. Therefore, the stress state and wear problems between the crankshaft and the upper and lower flanges seriously restrict the energy efficiency and reliability of the compressor. Therefore, improving the stress concentration phenomenon of the crankshaft and flange during operation is a technical problem that needs to be solved.

[0003] In the prior art, such as patent CN102251953B "Compressor Pump Body Structure and Compressor with the Pump Body Structure", a pump body structure is introduced. Its main feature is that the fit between the lower flange and the lower thrust surface of the crankshaft is a spherical surface, a hemispherical surface, a spherical table, or a spherical crown. The main idea is to change the horizontal contact mode between the crankshaft thrust surface and the lower flange, change its contact stress, and reduce the load of the crankshaft on the flange. Moreover, during the rotation of the crankshaft, the crankshaft will also generate a certain deflection, and the contact area between the spherical surface and the flange will tilt. The upper end of the hemisphere will exceed the horizontal plane of the flange, affecting the movement of the compressor rotor. The purpose of this solution is to reduce the load on the crankshaft thrust surface and the flange, but it cannot change the contact form and the magnitude of the contact stress between the crankshaft and the flange inner hole.

[0004] Patent CN110566463A, "Crankshaft and Compressor Having the Same," discloses a crankshaft for a compressor. Its characteristic is that the crankshaft protrudes outward to form a thrust portion, the purpose of which is to increase the thrust area between the crankshaft and the flange, reduce contact pressure, and improve the wear resistance of the wear surface. Analyzing its structure and actual purpose, the contact between the crankshaft and the flange is also a hemispherical structure. Its structure mainly changes the contact area between the crankshaft thrust portion and the horizontal surface of the flange, thereby changing the contact stress and wear of the crankshaft and flange thrust surface. However, it cannot change the magnitude of the contact stress between the crankshaft and the flange inner bore.

[0005] Patent CN207111433U, "Thrust Assembly of Rotary Compressor and Rotary Compressor", describes a crankshaft for a compressor. Its feature is that several spaced flanges are provided on the crankshaft thrust surface. Its main purpose is to change the contact mode between the crankshaft thrust surface and the flange surface, thereby reducing the contact stress between the crankshaft thrust surface and the flange plane to reduce wear and power consumption. However, its structure does not change the contact form and contact stress magnitude between the crankshaft and the flange inner hole.

[0006] How to reduce the contact stress between the crankshaft and the flange bore, improve the friction state between the crankshaft and the flange, and achieve the goals of relatively reducing contact stress, reducing wear, and enhancing reliability is a technical problem that urgently needs to be solved. Summary of the Invention

[0007] Therefore, the present invention provides a pump body assembly, a rotor compressor, and an air conditioner, which can solve the technical problem of stress concentration between the crankshaft and the upper and lower flanges caused by crankshaft deflection in the prior art.

[0008] To address the above problems, the present invention provides a pump body assembly, a rotary compressor, and an air conditioner, wherein:

[0009] In a first aspect, the present invention provides a pump body assembly, 1. a pump body assembly comprising a crankshaft and an upper flange and a lower flange for supporting the crankshaft, the crankshaft comprising a long shaft and a short shaft, characterized in that the outer circular surface of the long shaft is provided with a first outer spherical surface protruding from the outer circular surface of the long shaft, the first outer spherical surface comprising a first upper spherical surface and a first lower spherical surface, the first outer spherical surface having a first great circle perpendicular to the axis of the crankshaft, the first upper spherical surface and the first lower spherical surface being respectively disposed on the upper and lower sides of the first great circle; the inner hole of the upper flange includes a first inner spherical surface in contact with the spherical surface of the first outer spherical surface;

[0010] And / or,

[0011] The outer circular surface of the short shaft is provided with a second outer spherical surface that protrudes from the outer circular surface of the long shaft. The second outer spherical surface includes a second upper spherical surface and a second lower spherical surface. The second outer spherical surface has a second large circle perpendicular to the crankshaft axis. The second upper spherical surface and the second lower spherical surface are respectively located on the upper and lower sides of the second large circle. The inner hole of the lower flange includes a second inner spherical surface that contacts the spherical surface of the second outer spherical surface.

[0012] In some embodiments, the diameter of the first outer spherical surface is greater than the diameter of the major axis, and the diameter of the second outer spherical surface is greater than the diameter of the minor axis.

[0013] In some embodiments, the upper flange includes a first upper flange and a second upper flange separated along the diameter of the upper flange; and / or, the lower flange includes a first lower flange and a second lower flange separated along the diameter of the lower flange.

[0014] In some embodiments, the inner bore surface of the upper flange is provided with a first upper groove extending along the axial direction of the upper flange, and the first upper groove is provided at the junction of the first upper flange and the second upper flange; and / or, the inner bore surface of the lower flange is provided with a first lower groove extending along the axial direction of the lower flange, and the first lower groove is provided at the junction of the first lower flange and the second lower flange.

[0015] In some embodiments, the lower end face of the upper flange is provided with a second upper groove extending along the radial direction of the upper flange, the second upper groove being disposed at the junction of the first upper flange and the second upper flange, and the second upper groove communicating with the first upper groove; and / or, the upper end face of the lower flange is provided with a second lower groove extending along the radial direction of the lower flange, the second lower groove being disposed at the junction of the first lower flange and the second lower flange, and the second lower groove communicating with the first lower groove.

[0016] In some embodiments, the upper flange includes an upper groove disposed on the lower end face of the upper flange and an upper rotating block disposed in the upper groove; the upper rotating block includes a first upper half and a second upper half, and the first inner spherical surface is disposed between the first upper half and the second upper half.

[0017] And / or,

[0018] The lower flange includes a lower groove on the upper end face of the lower flange and a lower rotating block disposed in the lower groove; the lower rotating block includes a first lower half and a second lower half, and the second inner spherical surface is disposed between the first lower half and the second lower half.

[0019] In some embodiments, when the first upper half and the second upper half are combined together to wrap the first outer spherical surface, a gap is formed between the first upper half and the second upper half.

[0020] In some embodiments, the upper rotating block is capable of rotating within the upper groove about the axis of the inner hole of the upper flange;

[0021] And / or, the lower rotating block is capable of rotating within the lower groove about the axis of the inner hole of the lower flange.

[0022] In some embodiments, an upper bearing is provided in the upper groove, and the upper rotating block is disposed inside the inner ring of the upper bearing;

[0023] And / or, a lower bearing is provided in the lower groove, and the lower rotating block is disposed inside the inner ring of the lower bearing.

[0024] Secondly, the present invention provides a rotary compressor, including the aforementioned pump body assembly.

[0025] Thirdly, the present invention provides an air conditioner including the aforementioned rotary compressor.

[0026] This invention provides a first outer spherical surface on the outer surface of the long shaft and a second outer spherical surface on the outer surface of the short shaft. Simultaneously, a first inner spherical surface matching the first outer spherical surface is provided in the inner hole of the upper flange, and a second inner spherical surface matching the second outer spherical surface is provided in the inner hole of the lower flange. This ensures that the interaction area between the crankshaft and the upper and lower flanges remains essentially constant when the crankshaft deflects. This results in uniform force distribution between the crankshaft and the upper and lower flanges, significantly improving stress concentration. Consequently, wear between the first outer spherical surface and the first, second, and second inner spherical surfaces is significantly reduced, increasing the applicability and service life of the pump assembly. Attached Figure Description

[0027] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0028] Figure 1 This is an exploded view of the pump body assembly according to an embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view of the pump body assembly according to an embodiment of the present invention;

[0030] Figure 3 This is an embodiment of the present invention. Figure 2Enlarged view of point A in the middle;

[0031] Figure 4 This is a radial sectional view of the flange in an embodiment of the present invention;

[0032] Figure 5 This is an embodiment of the present invention. Figure 4 Enlarged view at point B in the middle;

[0033] Figure 6 This is a schematic diagram of the upper flange in an embodiment of the present invention;

[0034] Figure 7 This is an embodiment of the present invention. Figure 6 Enlarged view at point C;

[0035] Figure 8 This is a radial schematic diagram of the first upper flange in an embodiment of the present invention;

[0036] Figure 9 This is an embodiment of the present invention. Figure 8 Enlarged view at point D;

[0037] Figure 10 This is a radial sectional view of the flange in an embodiment of the present invention;

[0038] Figure 11 This is a schematic diagram of the crankshaft according to an embodiment of the present invention;

[0039] Figure 12 This is a radial sectional view of the flange with a rotating block in an embodiment of the present invention;

[0040] Figure 13 This is a radial sectional view of the upper flange when the rotating block is removed according to an embodiment of the present invention;

[0041] Figure 14 This is a radial sectional view of the rotating block according to an embodiment of the present invention;

[0042] Figure 15 This is a schematic diagram of the axial direction of the rotating block in an embodiment of the present invention;

[0043] Figure 16 This is a radial sectional view of the upper flange when an upper bearing is provided in an embodiment of the present invention;

[0044] Figure 17 This is an axial schematic diagram of an embodiment of the present invention where the rotating block is disposed inside the upper bearing;

[0045] Figure 18 This is a schematic diagram of an existing rotary compressor.

[0046] Figure 19 This is a schematic diagram of a flange in existing technology;

[0047] Figure 20 A schematic diagram of a crankshaft using existing technology;

[0048] Figure 21 This is a power consumption comparison table between the embodiments of the present invention and the prior art.

[0049] The reference numerals in the attached figures are as follows:

[0050] 1. Crankshaft; 101. Long shaft; 102. Short shaft; 103. Eccentric part; 201. Upper flange; 2011. First upper flange; 2012. Second upper flange; 202. Lower flange; 2021. First lower flange; 2022. Second lower flange; 301. First outer spherical surface; 3011. First upper spherical surface; 3012. First lower spherical surface; 302. Second outer spherical surface; 3021. Second upper spherical surface; 3022. Second lower spherical surface; 401. First inner spherical surface; 402. Second inner spherical surface; 501. First upper groove; 502. Second upper groove; 503. Upper groove; 601. First upper half; 602. Second upper half; 603. Spacing; 6. Rotating block; 7. Upper bearing. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0053] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of illustrative purposes and to facilitate understanding and reading by those skilled in the art, and are not intended to limit the conditions under which the invention can be implemented. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed in the invention. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0055] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0056] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0057] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0058] This invention provides a pump body assembly, a rotor compressor, and an air conditioner, which can solve the technical problem of stress concentration between the crankshaft and the upper and lower flanges caused by crankshaft deflection in the prior art.

[0059] like Figure 1-17 As shown, a pump body assembly includes a crankshaft 1 and an upper flange 201 and a lower flange 202 for supporting the crankshaft 1. The crankshaft 1 includes a major shaft 101 and a minor shaft 102. The major shaft 101 has a first outer spherical surface 301 protruding from its outer surface. The first outer spherical surface 301 includes a first upper spherical surface 3011 and a first lower spherical surface 3012. The first outer spherical surface 301 has a first great circle perpendicular to the axis of the crankshaft 1. The first upper spherical surface 3011 and the first lower spherical surface 3012 are respectively disposed on the upper and lower sides of the first great circle. The inner hole of the upper flange 201 includes a first inner spherical surface 401 that contacts the spherical surface of the first outer spherical surface 301.

[0060] And / or,

[0061] The outer circular surface of the short shaft 102 is provided with a second outer spherical surface 302 that protrudes from the outer circular surface of the long shaft 101. The second outer spherical surface 302 includes a second upper spherical surface 3021 and a second lower spherical surface 3022. The second outer spherical surface 302 has a second large circle perpendicular to the axis of the crankshaft 1. The second upper spherical surface 3021 and the second lower spherical surface 3022 are respectively disposed on the upper and lower sides of the second large circle. The inner hole of the lower flange 202 includes a second inner spherical surface 402 that contacts the spherical surface of the second outer spherical surface 302.

[0062] The great circle of the sphere is a circle passing through the center of the sphere, and the first great circle is a circle passing through the first spherical surface and perpendicular to the axis of the crankshaft 1. By making the first spherical surface include the first upper spherical surface 3011 and the first lower spherical surface 3012 disposed on the upper and lower sides of the first great circle, the first outer spherical surface 301 and the first inner spherical surface 401 are always in spherical contact regardless of the deflection direction of the major axis 101 of the crankshaft 1, and the contact area remains basically unchanged. Similarly, the second outer spherical surface 302 and the second inner spherical surface 402 are also always in spherical contact, and the contact area remains basically unchanged.

[0063] By setting a first outer spherical surface 301 on the outer circular surface of the long shaft 101 of crankshaft 1, and surrounding it with a first inner spherical surface 401 to form a spherical cavity, the first outer spherical surface 301 is disposed within the spherical cavity, and the first outer spherical surface 301 and the first inner spherical surface 401 are in spherical fit. When the operating speed of crankshaft 1 changes, the deflection of crankshaft 1 also changes accordingly. The contact surface between crankshaft 1 and upper flange 201 always maintains a stable spherical contact, and its contact area remains unchanged. The contact pattern between crankshaft 1 and upper flange 201 does not change, so the stress concentration is greatly improved, and the wear is significantly reduced. In addition, the operating range of the pump body assembly can be significantly widened (compared with the prior art, the crankshaft 1 rotates at a higher speed when the same concentrated stress is generated), improving the applicability and service life of the pump body assembly. When the pump body assembly is applied to a compressor, the compressor's operating frequency range is also higher, and its service life is longer.

[0064] Similarly, the short shaft 102 of crankshaft 1 is provided with a second outer spherical surface 302, and the inner hole of the lower flange 202 is provided with a second inner spherical surface 402. The second outer spherical surface 302 of crankshaft 1 is located within the spherical cavity formed by the second inner spherical surface 402, and there is a spherical fit between the second outer spherical surface 302 and the second inner spherical surface 402. The technical effect between the short shaft 102 and the lower flange 202 is the same as that between the long shaft 101 and the upper flange 201. In addition, both the long shaft 101 and the short shaft 102 of crankshaft 1 are fitted with the upper flange 201 and the lower flange 202 respectively through a spherical fit, which further improves the bending resistance of crankshaft 1, reduces the deflection of crankshaft 1, and is beneficial to improving the rotational stability of crankshaft 1. This pump body assembly is used to improve the contact stress state of the flange of compressor crankshaft 1 and reduce the wear risk of flange and crankshaft 1, which has a significant improvement and enhancement effect on the reliable operation and service life of compressor.

[0065] Preferably, the diameter of the first outer spherical surface 301 is larger than the diameter of the major axis 101, and the diameter of the second outer spherical surface 302 is larger than the diameter of the minor axis 102.

[0066] The first outer spherical surface 301 is a convex spherical structure, and the second outer spherical surface 302 is also a convex spherical structure. This effectively improves the structural strength of the crankshaft 1. On the other hand, when the crankshaft 1 deflects, the first outer spherical surface 301 and the first inner spherical surface 401 can still make spherical contact, and the second outer spherical surface 302 can still make spherical contact with the second inner spherical surface 402, which effectively reduces the concentrated stress between the crankshaft 1 and the upper flange 201 and the lower flange 202.

[0067] Preferably, in order to enable the crankshaft 1 to be assembled with the upper flange 201 and the lower flange 202, this application discloses two embodiments, Embodiment 1:

[0068] like Figure 1, Figure 4-5 As shown, the upper flange 201 includes a first upper flange 2011 and a second upper flange 2012 separated along the diameter of the upper flange 201; and / or, as Figure 10-11 As shown, the lower flange 202 includes a first lower flange 2021 and a second lower flange 2022 separated along the diameter of the lower flange 202.

[0069] By dividing the upper flange 201 into a first upper flange 2011 and a second upper flange 2012 separated along its diameter, and simultaneously dividing the first inner spherical surface 401 into two hemispheres, during installation, the first upper flange 2011 and the second upper flange 2012 are separated and wrapped around the first outer spherical surface 301 by the two hemispheres, and then the first upper flange 2011 and the second upper flange 2012 are fixed together with bolts. This method of assembling the long shaft 101 of the crankshaft 1 and the upper flange 201 improves production efficiency. Similarly, by dividing the lower flange 202 into a first lower flange 2021 and a second lower flange 2022 separated along its diameter, and simultaneously dividing the second inner spherical surface 402 into two hemispheres, during installation, the first lower flange 2021 and the second lower flange 2022 are separated and wrapped around the second outer spherical surface 302 by the two hemispheres, and then the first lower flange 2021 and the second lower flange 2022 are fixed together with bolts. By assembling the long shaft 101 and upper flange 201 of crankshaft 1, and assembling the short shaft 102 and lower flange 202 of crankshaft 1 in the above manner, production efficiency is improved.

[0070] Preferred, such as Figure 4-7 As shown, the inner bore surface of the upper flange 201 is provided with a first upper groove 501 extending along the axial direction of the upper flange 201, and the first upper groove 501 is provided at the junction of the first upper flange 2011 and the second upper flange 2012; and / or, the inner bore surface of the lower flange 202 is provided with a first lower groove extending along the axial direction of the lower flange 202, and the first lower groove is provided at the junction of the first lower flange 2021 and the second lower flange 2022.

[0071] By providing the first upper groove 501, lubricating oil flowing from the center hole of the crankshaft 1 enters the first upper groove 501. Since the first upper groove 501 extends along the axial direction of the upper flange 201, this allows the outer surface of the long shaft 101 to contact the first upper groove 501 when the crankshaft 1 rotates. In other words, the lubricating oil in the first upper groove 501 can lubricate the outer surface of the long shaft 101, reducing the friction between the long shaft 101 and the upper flange 201 support. Similarly, the provision of the first lower groove also reduces the friction between the short shaft 102 and the lower flange 202.

[0072] By setting the first upper groove 501 at the junction of the first upper flange 2011 and the second upper flange 2012, the integrity of the first upper flange 2011 and the second upper flange 2012 is effectively guaranteed. The first upper groove 501 forms a chamfer on the inner edge of the end faces of the first upper flange 2011 and the second upper flange 2012 that are in contact with each other. This chamfer can remove sharp corners and internal stress formed during processing, thereby improving the structural strength of the upper flange 201. Similarly, the setting of the first lower groove is the same as that of the first upper groove 501.

[0073] Preferred, such as Figure 8-9 As shown, the lower end face of the upper flange 201 is provided with a second upper groove 502 extending along the radial direction of the upper flange 201. The second upper groove 502 is located at the junction of the first upper flange 2011 and the second upper flange 2012, and the second upper groove 502 communicates with the first upper groove 501; and / or, the upper end face of the lower flange 202 is provided with a second lower groove extending along the radial direction of the lower flange 202. The second lower groove is located at the junction of the first lower flange 2021 and the second lower flange 2022, and the second lower groove communicates with the first lower groove.

[0074] By providing a second upper groove 502 that extends radially along the upper flange 201 and communicates with the first groove, lubricating oil entering the first upper groove 501 flows radially along the first lower groove under gravity. This allows the lubricating oil to form an oil film between the upper end face of the eccentric portion 103 of the crankshaft 1 and the lower end of the upper flange 201 when the crankshaft 1 rotates, reducing the friction between the eccentric portion 103 and the upper end face. Furthermore, by placing the second upper groove 502 at the junction of the first upper flange 2011 and the second upper flange 2012, the second upper groove 502 forms a chamfer around the edges of the lower end faces of the first upper flange 2011 and the second upper flange 2012, further reducing sharp corner stress, improving the structural strength of the first upper flange 2011 and the second upper flange 2012, and increasing their service life. Similarly, the second lower groove and the second upper groove 502 are configured in the same way.

[0075] Example 2: Figure 12-17 As shown, the upper flange 201 includes an upper groove 503 disposed on the lower end face of the upper flange 201 and an upper rotating block 6 disposed in the upper groove 503; the upper rotating block 6 includes a first upper half block 601 and a second upper half block 602, and the first inner spherical surface 401 is disposed between the first upper half block 601 and the second upper half block 602.

[0076] And / or,

[0077] The lower flange 202 includes a lower groove on the upper end surface of the lower flange 202 and a lower rotating block 6 disposed in the lower groove; the lower rotating block 6 includes a first lower half and a second lower half, and the second inner spherical surface 402 is disposed between the first lower half and the second lower half.

[0078] The upper rotating block 6 is divided into a first upper half 601 and a second upper half 602. After passing through the first outer spherical surface 301, the first upper half 601 and the second upper half 602 are placed in the upper groove 503, thereby completing the assembly of the long shaft 101 of the crankshaft 1 with the upper flange 201. Compared with dividing the upper flange 201 into a first upper flange 2011 and a second upper flange 2012, this embodiment does not require the upper flange 201 to be set as two parts as a whole. It only needs to set the part of the upper flange 201 that contacts the first outer spherical surface 301 as a separate structure (that is, the upper rotating block 6). Then, the upper groove 503 for accommodating the upper rotating block 6 is set on the upper flange 201. The upper flange 201 as a whole is still a complete structure, which ensures the structural strength and machining accuracy of the upper flange 201, ensures the fitting accuracy between the long shaft 101 of the crankshaft 1 and the upper flange 201, and improves the smoothness of the rotation of the crankshaft 1.

[0079] Similarly, the fit between the lower rotating block 6 and the lower flange 202 has the same technical effect.

[0080] In addition, the fit between the upper flange 201 and the lower flange 202 makes the support of the crankshaft 1 in its own length direction more stable, which is conducive to improving the smoothness of the crankshaft 1 rotation and reducing the concentrated stress between the crankshaft 1 and the flange.

[0081] Preferred, such as Figure 16-17 As shown, when the first upper half 601 and the second upper half 602 are combined together to wrap the first outer spherical surface 301, a gap 603 is formed between the first upper half 601 and the second upper half 602.

[0082] When the lubricating oil flowing out of the central hole of the crankshaft 1 flows through the interval 603, the lubricating oil can be stored in the interval 603. When the crankshaft 1 rotates, the lubricating oil in the interval 603 lubricates the first outer spherical surface 301, which improves the rotational stability of the long shaft 101. In addition, since the crankshaft 1 generates heat due to friction when it rotates, the heat causes the upper rotating block 6 to expand. The interval 603 provides space for the expansion of the first upper half block 601 and the second upper half block 602, avoiding (reducing) the squeezing force generated by the expansion of the first upper half block 601 and the second upper half block 602 on the first outer spherical surface 301, thereby reducing the friction between the upper rotating block 6 and the crankshaft 1, which is beneficial to improving the rotational stability of the crankshaft 1.

[0083] Preferably, the upper rotating block 6 is capable of rotating within the upper groove 503 about the axis of the inner hole of the upper flange 201;

[0084] And / or, the lower rotating block 6 is capable of rotating within the lower groove about the axis of the inner hole of the lower flange 202.

[0085] Both the upper rotating block 6 and the lower rotating block 6 are cylindrical, and similarly, the upper groove 503 and the lower groove are cylindrical cavities. When the crankshaft 1 rotates, there are three rotation states: First, the upper rotating block 6 and the lower rotating block 6 are stationary, and the crankshaft 1 rotates relative to the upper rotating block 6 and the lower rotating block 6; Second, the upper rotating block 6 and the lower rotating block 6 rotate together with the crankshaft 1; Third, the crankshaft 1 rotates relative to the upper rotating block 6 and the lower rotating block 6, and at the same time, the upper rotating block 6 and the lower rotating block 6 also rotate relative to the upper groove 503 and the lower groove. Assembly can be performed according to the specific application of the pump body assembly. In the first state, since the upper rotating block 6 and the lower rotating block 6 are stationary relative to the upper groove 503 and the lower groove, it is beneficial to improve the rotational accuracy of the crankshaft 1 and reduce the concentrated stress between the crankshaft 1 and the upper flange 201 and the lower flange 202, but wear is faster. In the second configuration, the rotation of crankshaft 1 drives the upper and lower rotating blocks 6 to rotate simultaneously. This ensures that the concentrated stress between crankshaft 1 and the upper and lower rotating blocks 6 only occurs when the crankshaft 1 deflects. This helps extend the service life of the pump assembly and reduces the concentrated stress between crankshaft 1 and the upper and lower flanges 201 and 202. However, this configuration is more complex to manufacture. In the third configuration, the concentrated stress between crankshaft 1 and the upper and lower flanges 201 and 202 is low, and the wear between crankshaft 1 and the upper and lower rotating blocks 6 is also slower. However, this configuration is more difficult to manufacture. The specific method used depends on the actual needs.

[0086] An oil passage can be set to connect the outer circular surface of the long shaft 101, the upper rotating block 6, and the inner surface of the groove. When the crankshaft 1 rotates, the lubricating oil lubricates each friction pair.

[0087] Preferred, such as Figure 17 As shown, an upper bearing 7 is provided in the upper groove 503, and the upper rotating block 6 is disposed inside the inner ring of the upper bearing 7;

[0088] And / or, a lower bearing is provided in the lower groove, and the lower rotating block 6 is disposed inside the inner ring of the lower bearing.

[0089] By setting the upper bearing 7 and the lower bearing, the stability of the crankshaft 1 relative to the upper flange 201 and the lower flange 202 is improved. Since the crankshaft 1 rotates more smoothly, its own deflection change is also smaller, which helps to reduce the concentrated stress between the crankshaft 1 and the upper flange 201 and the lower flange 202.

[0090] The present invention provides a rotary compressor, including the aforementioned pump body assembly.

[0091] To verify the actual working effect of this application, the actual parameters of various structures of the compressor are as follows: the diameter of the crankshaft 1 long shaft 101 is 12.9 mm; the contact part between the long shaft 101 and the upper flange 201 is a spherical structure contact; the center of the convex spherical surface (first outer spherical surface 301) on the long shaft 101 is on the central axis of the crankshaft 1 long shaft 101; the diameter of the convex spherical surface is 15.5 mm; the corresponding contact part between the upper flange 201 and the convex spherical surface of the long shaft 101 is a concave spherical surface (first inner spherical surface 401); the center of the spherical surface is on the central axis of the flange hole. The concave spherical surface has a diameter of 15.5 mm, and the short shaft 102 of crankshaft 1 has a diameter of 10.9 mm. The contact area between the short shaft 102 and the lower flange 202 is also a spherical structure contact. The center of the convex spherical surface (second outer spherical surface 302) on the short shaft 102 is on the central axis of the short shaft 102 of crankshaft 1, and the diameter of the convex spherical surface is 13.5 mm. The corresponding contact area between the lower flange 202 and the convex spherical surface of the short shaft 102 is a concave spherical surface (second inner spherical surface 402), and the center of the spherical surface is on the central axis of the flange hole, and the diameter of the concave spherical surface is 13.5 mm.

[0092] like Figure 21 As shown, the compressor with the aforementioned actual parameters was subjected to actual power consumption testing. A power consumption comparison list is provided, showing the power consumption of the rotor compressor of the pump body assembly of this application at different operating frequencies, compared to existing technologies (where the structure is identical except for the pump body assembly). Figure 21 It is evident that the compressor with the pump body assembly of this application has a significant power reduction effect. Since all other structures of the compressor are identical, it can be determined that the contribution of this power reduction is entirely due to the difference in the pump body assembly. This indicates that the pump body assembly of this application has a significant power reduction effect compared to conventional solutions. Moreover, from the analysis of the power reduction trend, the degree of power reduction also increases with the increase of operating frequency, indicating that this solution is more effective in reducing power consumption and frictional power consumption under high-frequency operation.

[0093] The present invention also provides an air conditioner including the aforementioned rotary compressor. The performance of this compressor is improved.

[0094] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0095] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A pump body assembly applied to a rotary compressor, comprising a crankshaft (1) and an upper flange (201) and a lower flange (202) for supporting the crankshaft (1), the crankshaft (1) comprising a long shaft (101) and a short shaft (102), characterized in that, The outer circular surface of the long shaft (101) is provided with a first outer spherical surface (301) protruding from the outer circular surface of the long shaft (101), the first outer spherical surface (301) comprises a first upper spherical surface (3011) and a first lower spherical surface (3012), the first outer spherical surface (301) has a first major circle perpendicular to the crankshaft (1) axis, the first upper spherical surface (3011) and the first lower spherical surface (3012) are arranged on the upper and lower sides of the first major circle respectively; the inner hole of the upper flange (201) comprises a first inner spherical surface (401) in spherical contact with the first outer spherical surface (301); The outer circular surface of the short shaft (102) is provided with a second outer spherical surface (302) protruding from the outer circular surface of the short shaft (102), the second outer spherical surface (302) comprises a second upper spherical surface (3021) and a second lower spherical surface (3022), the second outer spherical surface (302) has a second major circle perpendicular to the crankshaft (1) axis, the second upper spherical surface (3021) and the second lower spherical surface (3022) are arranged on the upper and lower sides of the second major circle respectively; the inner hole of the lower flange (202) comprises a second inner spherical surface (402) in spherical contact with the second outer spherical surface (302).

2. The pump body assembly of claim 1, wherein, The upper flange (201) comprises a first upper flange (2011) and a second upper flange (2012) separated along the diameter of the upper flange (201); and / or, the lower flange (202) comprises a first lower flange (2021) and a second lower flange (2022) separated along the diameter of the lower flange (202).

3. The pump body assembly of claim 2, wherein, The inner hole surface of the upper flange (201) is provided with a first upper groove (501) extending along the axial direction of the upper flange (201), the first upper groove (501) is arranged at the joint of the first upper flange (2011) and the second upper flange (2012); and / or, the inner hole surface of the lower flange (202) is provided with a first lower groove extending along the axial direction of the lower flange (202), the first lower groove is arranged at the joint of the first lower flange (2021) and the second lower flange (2022).

4. The pump body assembly of claim 3, wherein, The lower end surface of the upper flange (201) is provided with a second upper groove (502) extending along the radial direction of the upper flange (201), the second upper groove (502) is arranged at the joint of the first upper flange (2011) and the second upper flange (2012), the second upper groove (502) and the first upper groove (501) are communicated; and / or, the upper end surface of the lower flange (202) is provided with a second lower groove extending along the radial direction of the lower flange (202), the second lower groove is arranged at the joint of the first lower flange (2021) and the second lower flange (2022), the second lower groove and the first lower groove are communicated.

5. The pump body assembly of claim 1, wherein, The upper flange (201) comprises an upper groove (503) arranged on the lower end surface of the upper flange (201) and an upper rotating block (6) arranged in the upper groove (503); the upper rotating block (6) comprises a first upper half block (601) and a second upper half block (602), and the first inner spherical surface (401) is arranged between the first upper half block (601) and the second upper half block (602); and / or, The lower flange (202) comprises a lower groove arranged on the upper end surface of the lower flange (202) and a lower rotating block (6) arranged in the lower groove; the lower rotating block (6) comprises a first lower half block and a second lower half block, and the second inner spherical surface (402) is arranged between the first lower half block and the second lower half block.

6. The pump body assembly of claim 5, wherein, When the first upper half block (601) and the second upper half block (602) are combined together to wrap the first outer spherical surface (301), a gap (603) is formed between the first upper half block (601) and the second upper half block (602).

7. The pump body assembly of claim 6, wherein, The upper rotating block (6) can rotate in the upper groove (503) around the axis of the inner hole of the upper flange (201); and / or, the lower rotating block (6) can rotate in the lower groove around the axis of the inner hole of the lower flange (202).

8. The pump body assembly of claim 7, wherein, An upper bearing (7) is arranged in the upper groove (503), and the upper rotating block (6) is arranged inside the inner ring of the upper bearing (7); and / or, a lower bearing is arranged in the lower groove, and the lower rotating block (6) is arranged inside the inner ring of the lower bearing.

9. A rotary compressor characterized by The pump body assembly comprises the pump body assembly according to any one of claims 1-8.

10. An air conditioner characterized by comprising: The rotary compressor comprises the rotary compressor according to claim 9.

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