Balance block for compressor and rotor compressor

Abstract

The utility model relates to the technical field of compressors, and discloses a balance block for a rotor compressor. The balance block comprises a balance body and a windward body, the balance body is suitable for being arranged at the top end or the bottom end of the compressor rotor, and one end, in the circumferential direction, of the balance body is a first end face. The windward body protrudes outwards from the first end face of the balance body in the circumferential direction of the balance body, the windward body comprises a first windward side, the first windward side obliquely extends downwards from the top end of the first end face, and the included angle between the outer side wall of the windward body and the first end face is smaller than 90 degrees; a second included angle between the inner side wall of the windward body and the first end face is smaller than 90 degrees. The utility model further discloses the rotor compressor.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, for example, to a balancing block for a compressor and a rotor compressor. Background Art

[0002] In rotary compressors, balancing blocks are set on the upper and lower end surfaces of the motor rotor to balance the eccentric part of the crankshaft and the eccentric weight of the roller, so as to achieve static and dynamic balance design and reduce the vibration and noise level of the compressor. As the speed of the compressor motor rotor increases, the relative rotation speed of the balancing block and the high-temperature and high-pressure refrigerant in the compressor's internal environment also increases, and the resulting wind resistance and airflow disturbance also increase, increasing the power consumption of the compressor.

[0003] In order to reduce the air resistance of the balancing block, the related technology discloses a balancing block assembly for a compressor, including a balancing block seat and a balancing block fixedly connected to the balancing block seat, the balancing block seat is used to be fixedly connected to the rotor of the compressor, the balancing block is used to maintain dynamic balance when the crankshaft of the compressor rotates at high speed, and the angle between the windward surface of the balancing block and the balancing block seat is greater than 90 degrees.

[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] The refrigerant is guided to the upper part of the balancing block by the inclined surface of the balancing block and gathers on the top of the balancing block. It is not easy to form a stable laminar boundary layer on the top plane of the balancing block, and the fluid resistance of the balancing block is relatively large.

[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 balancing block for a compressor and a rotor compressor to reduce the amount of refrigerant diverted to the top of the balancing block so that a better laminar boundary layer can be formed on the top of the balancing block, thereby reducing the fluid resistance of the balancing block.

[0009] In some embodiments, a balancing block for a compressor includes a balancing body and a windward body, wherein the balancing body is suitable for being arranged at the top or bottom end of a compressor rotor, the balancing body having arc surfaces convex in the same direction on both inner and outer sides along the radial direction, and one end of the balancing body along the circumferential direction is a first end face; the windward body protrudes outward from the first end face of the balancing body along the circumferential direction of the balancing body, the windward body includes a first windward surface, the first windward surface extends obliquely downward from the top end of the first end face, the outer wall of the windward body and the first end face have an angle less than 90 degrees, and the second angle between the inner wall of the windward body and the first end face is less than 90 degrees.

[0010] In some embodiments, the angle between the outer side wall of the windward body and the first end surface satisfies the following relationship:

[0011] arctan(2*max(X) / B)≤α;

[0012] Wherein, max(X) is the distance between the distal end of the windward body and the first end surface, and α is the first angle between the outer side wall of the windward body and the first end surface.

[0013] In some embodiments, the angle between the inner side wall of the windward body and the first end surface satisfies the following relationship:

[0014] arctan(2*max(X) / B)≤β;

[0015] Wherein, max(X) is the distance between the distal end of the windward body and the first end surface, and β is the second angle between the inner side wall of the windward body and the first end surface.

[0016] In some embodiments, the thickness of the balancing body in the axial direction is smaller than the width in the radial direction.

[0017] In some embodiments, the windward body also includes a second windward surface, the first end of the first windward surface is docked with the top of the first end surface, the first end of the second windward surface is docked with the bottom end of the first end surface, the second end of the first windward surface is connected to the second end of the second windward surface, and the docking position is the highest point of the windward body protruding from the first end surface.

[0018] In some embodiments, the outer side wall of the windward body is smoothly connected to the first windward surface, and the outer side wall of the windward body is smoothly connected to the second windward surface.

[0019] In some embodiments, the inner side wall of the windward body is smoothly connected to the first windward surface, and the inner side wall of the windward body is smoothly connected to the second windward surface.

[0020] In some embodiments, a projection of the first windward surface on the plane where the first end surface is located is larger than a projection of the second windward surface on the plane where the first end surface is located.

[0021] In some embodiments, the first windward surface includes a first section, a second section, and a third section from the first end to the second end, and the slope of the second section is greater than the slopes of the first section and the third section.

[0022] In some embodiments, the slope of the third section of the first windward surface is greater than the slope of the first section of the first windward surface.

[0023] In some embodiments, the rotary compressor includes a shell, a rotor and the above-mentioned balancing block, wherein the shell is configured with a accommodating space; the rotor is rotatably disposed in the accommodating space; and the above-mentioned balancing block is installed at the top end and / or bottom end of the rotor.

[0024] The balancing block for a compressor and the rotor compressor provided by the embodiments of the present disclosure can achieve the following technical effects:

[0025] When the refrigerant is mainly guided by the windward body to the top plane of the balancing body, the refrigerant is denser near the top of the balancing body. In the balancing block provided by the embodiment of the present disclosure, the inner wall and the outer wall of the windward body also play a certain guiding role, guiding a part of the refrigerant directly in front of the windward body to the inner and outer wall surfaces of the windward body. With such a setting, the refrigerant directly in front of the windward body can be better distributed to the top plane, the outer wall and the inner wall of the balancing body, so that the multiple wall surfaces of the balancing body can form a relatively stable laminar boundary layer, thereby reducing the fluid resistance of the balancing block.

[0026] 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

[0027] 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:

[0028] Figure 1 is a structural schematic diagram of a balancing block for a compressor provided by an embodiment of the present disclosure;

[0029] Figure 2 is a structural schematic diagram of another balancing block for a compressor provided by an embodiment of the present disclosure;

[0030] Figure 3 is a structural schematic diagram of another balancing block for a compressor provided by an embodiment of the present disclosure;

[0031] Figure 4 is a structural schematic diagram of another balancing block for a compressor provided by an embodiment of the present disclosure;

[0032] Figure 5 is a structural schematic diagram of another balancing block for a compressor provided by an embodiment of the present disclosure;

[0033] Figure 6 is a structural schematic diagram of another balancing block for a compressor provided by an embodiment of the present disclosure;

[0034] Figure 7 It is a schematic structural diagram of another balancing block for a compressor provided in an embodiment of the present disclosure.

[0035] Reference numerals:

[0036] 100: balancing body; 110: first end face; 120: second end face; 200: windward body; 210: first windward surface; 211: first section; 212: second section; 213: third section; 220: second windward surface; 230: outer wall; 240: inner wall; 300: leeward body; 310: first leeward surface; 320: second leeward surface. DETAILED DESCRIPTION

[0037] 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.

[0038] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure 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, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0039] 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.

[0040] 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.

[0041] Unless otherwise stated, the term "plurality" means two or more.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] In a rotary compressor, by arranging balancing blocks on the upper and lower end surfaces of the motor rotor to balance the eccentric portion of the crankshaft and the eccentric weight of the roller, a static and dynamic balance design is achieved to reduce the vibration and noise level of the compressor. As the speed of the compressor motor rotor increases, the relative rotation speed of the balancing block and the high-temperature and high-pressure refrigerant in the internal environment of the compressor also increases, and the resulting wind resistance and airflow disturbance also increase, increasing the power consumption of the compressor. In order to reduce the air resistance of the balancing block, a balancing block assembly is disclosed in the related art, which is used for a compressor, including a balancing block seat and a balancing block fixedly connected to the balancing block seat, the balancing block seat is used to be fixedly connected to the rotor of the compressor, and the balancing block is used to maintain dynamic balance when the crankshaft of the compressor rotates at high speed, and the angle between the windward surface of the balancing block and the balancing block seat is greater than 90 degrees.

[0046] The problem with the related technology is that the refrigerant is guided to the upper part of the balancing block by the inclined surface of the balancing block and gathers on the top of the balancing block. It is not easy to form a stable laminar boundary layer on the top plane of the balancing block, and the fluid resistance of the balancing block is relatively large.

[0047] In order to reduce the amount of refrigerant diverted to the top of the balancing block so that a better laminar boundary layer can be formed on the top of the balancing block to reduce the fluid resistance of the balancing block, Figure 1-7 As shown, the embodiment of the present disclosure provides a balancing block for a compressor. The balancing block includes a balancing body 100 and a windward body 200, wherein the balancing body 100 is suitable for being arranged at the top or bottom end of the compressor rotor, and the balancing body 100 has arc surfaces protruding in the same direction on both inner and outer sides along the radial direction, and one end of the balancing body 100 along the circumferential direction is a first end face 110; the windward body 200 protrudes outwardly along the circumferential direction of the balancing body 100 from the first end face 110 of the balancing body 100, and the windward body 200 includes a first windward surface 210, and the first windward surface 210 extends obliquely downward from the top of the first end face 110, and the angle between the outer side wall 230 of the windward body 200 and the first end face 110 is less than 90 degrees, and the second angle between the inner side wall 240 of the windward body 200 and the first end face 110 is less than 90 degrees.

[0048] In an embodiment of the present disclosure, a balancing weight is used in a rotary compressor. The rotary compressor includes a housing and a rotor, wherein the rotor is rotatably disposed in the housing. The balancing weight is suitable for being installed at the top and / or bottom end of the rotor to balance the eccentric weight of the rotor.

[0049] The "top end" and "bottom end" in the embodiments of the present disclosure refer to the use state of the rotor of the rotary compressor in which the rotor is arranged vertically. The "radial direction", "axial direction" and "circumferential direction" also refer to the rotor of the rotary compressor, where the axial direction is in the vertical direction, the radial direction is in the direction from the center to the outside, and the circumferential direction is the rotation direction of the rotor.

[0050] The following description will be made by taking the case where the balancing block is arranged at the top end of the rotor compressor as an example.

[0051] The balancing block includes a balancing body 100 and a windward body 200. The balancing body 100 is heavy and plays a major role in balancing the mass of the rotor. The windward body 200 is connected to the balancing body 100 and is mainly used to optimize the fluid dynamics of the balancing block.

[0052] Specifically, the balancing body 100 has a top end face and a bottom end face in the axial direction of the rotor, an inner side wall and an outer side wall in the radial direction of the rotor, and a first end face 110 and a second end face 120 in the axial direction. The first end face 110 is along the radial direction of the rotor, and the second end face 120 is along the radial direction of the rotor. During the rotation of the rotor, the first end face 110 is the windward side, and the second end face 120 is the leeward side.

[0053] The windward body 200 is disposed on the first end surface 110 of the balancing body 100. The windward body 200 protrudes outward from the first end surface 110, and the protruding direction is along the rotation direction of the balancing block.

[0054] The windward body 200 includes a first windward surface 210, the top of which is connected to the top of the balancing body 100, that is, the top of the first end surface 110. The first windward surface 210 extends from top to bottom in a direction away from the first end surface 110. The second windward surface extends obliquely upward from the bottom of the first end surface 110 of the balancing body 100 and is connected to the first windward surface 210 of the windward body 200.

[0055] In the related art, the windward body 200 of some balancing blocks adopts an inclined flow guide form in which the windward surfaces are formed from the inner and outer sides of the first end face 110 along the radial direction, and the two windward surfaces converge from the inner and outer sides to the middle. With this flow guide form, a vortex formed by a part of the refrigerant flowing along the windward body 200 is located on the outside of the balancing block. When the rotor rotates, the refrigerant is thrown to the outside of the rotor, thereby forming a surrounding high-pressure area away from the rotor and a central low-pressure area close to the rotor. The vortex formed by the refrigerant along the windward body 200 is located on the outside of the balancing block, closer to the surrounding high-pressure areas of the compressor. In this case, it is not easy to form a relatively stable laminar boundary layer on the outside of the windward body 200. Even if a laminar boundary layer is formed, the balancing block is subjected to greater fluid resistance due to the interaction of the refrigerant in the surrounding high-pressure areas.

[0056] In order to guide the refrigerant located in front of the windward body 200 to the top of the balancing body 100, the windward surface of the windward body 200 of the balancing block provided in the embodiment of the present disclosure includes a first windward surface 210 that is tilted from top to bottom as a whole. When the rotor of the compressor rotates, the windward body 200 of the balancing block guides the refrigerant located in front of the windward body 200 to the upper side of the balancing body 100. In this way, the tail vortex of the balancing block and the separation of the laminar boundary layer mainly occur above the first windward surface 210, which is conducive to the formation of a relatively stable laminar boundary layer on the outer side and the top of the balancing block. In this way, the fluid resistance of the balancing block can be reduced.

[0057] The first end face 110 is parallel to a radial line of the balancing body 100. The angle between the outer side wall 230 of the windward body 200 and the first end face 110 is less than 90°, and the outer side wall 230 of the windward body 200 is inclined from the outside to the inside from the first end face 110 forward. The angle between the inner side wall 240 of the windward body 200 and the first end face 110 is less than 90°, and the inner side wall 240 of the windward body 200 is inclined from the outside to the inside from the first end face 110 forward. That is, the distance between the first end face 110 and the second end face 120 of the windward body 200 gradually decreases from the first end face 110 forward. Forward refers to the rotation direction of the balancing body 100.

[0058] When the refrigerant is mainly guided by the windward body 200 to the top plane of the balancing body 100, the refrigerant is relatively dense near the top of the balancing body 100. In the balancing block provided by the embodiment of the present disclosure, the inner wall and the outer wall of the windward body 200 also play a certain guiding role, guiding a part of the refrigerant directly in front of the windward body 200 to the inner wall 240 surface and the outer wall 230 surface of the windward body 200. With such a setting, the refrigerant directly in front of the windward body can be better distributed to the top plane, the outer wall 230 and the inner wall 240 of the balancing body 100, so that the multiple wall surfaces of the balancing body 100 can form a relatively stable laminar boundary layer, thereby reducing the fluid resistance of the balancing block.

[0059] Optionally, combined Figure 4 As shown, the angle between the outer side wall of the windward body and the first end face satisfies the following relationship:

[0060] arctan(2*max(X) / B)≤α;

[0061] Wherein, max(X) is the distance between the distal end of the windward body and the first end surface, and α is the first angle between the outer side wall of the windward body and the first end surface.

[0062] With such parameter selection, the fluid resistance of the balancing block is small in the simulation test.

[0063] Optionally, the angle between the inner side wall of the windward body and the first end surface satisfies the following relationship:

[0064] arctan(2*max(X) / B)≤β;

[0065] Wherein, max(X) is the distance between the distal end of the windward body and the first end surface, and β is the second angle between the inner side wall of the windward body and the first end surface.

[0066] With such parameter selection, the fluid resistance of the balancing block is small in the simulation test.

[0067] Optionally, the thickness of the balancing body 100 in the axial direction is smaller than the width in the radial direction.

[0068] The thickness of the balancing body 100 along the shaft pin is small, which can reduce the stirring of the gaseous refrigerant by the balancing block, which is beneficial to reducing the fluid resistance of the balancing block. The width of the balancing body 100 along the radial direction is large, and the balancing block can better balance the eccentric weight of the rotor.

[0069] Optionally, the windward body 200 also includes a second windward surface 220, the first end of the first windward surface 210 is docked with the top of the first end surface 110, the first end of the second windward surface 220 is docked with the bottom end of the first end surface 110, the second end of the first windward surface 210 is connected to the second end of the second windward surface 220, and the docking position is the highest point of the windward body 200 protruding from the first end surface 110.

[0070] In the case where the windward body 200 only includes the first windward surface 210, the balancing block will be subjected to downward pressure from the liquid refrigerant when rotating, and the refrigerant will be subjected to an upward lift. The downward force on the balancing block is transmitted to the compressor rotor, which is not conducive to the support and lubrication of the compressor rotor. In addition, a portion of the refrigerant oil is broken into mist oil droplets by the compressor rotor or the balancing block. The mist oil droplets have a large specific gravity and can return to the bottom of the compressor under the action of gravity in most cases. However, when the refrigerant is subjected to an upward lift, the mist oil droplets are easily discharged from the exhaust of the compressor with the refrigerant. This will affect the lubrication effect of the compressor.

[0071] The balancing block provided in the embodiment of the present disclosure, the windward body 200 includes a first windward surface 210 and a second windward surface 220. The first windward surface 210 extends obliquely downward from the top of the first end surface 110 of the balancing body 100, and the second windward surface 220 extends obliquely upward from the bottom of the first end surface 110 of the balancing body 100 and is connected to the first windward surface 210 of the windward body 200.

[0072] When the compressor rotor rotates, the first windward surface 210 interacts with the refrigerant to apply a downward force to the balance block, and the second windward surface 220 interacts with the refrigerant to apply an upward force to the balance block. In this way, the downward force of the balance block on the rotor can be reduced as a whole, so that the compressor rotor can be better supported and lubricated. When the rotor rotates, the refrigerant located on the second windward surface 220 will not be subject to an upward lift force, so that the amount of refrigeration oil discharged from the compressor exhaust port along with the refrigerant can be reduced, thereby improving the lubrication effect of the compressor.

[0073] Optionally, the outer side wall 230 of the windward body 200 is smoothly connected to the first windward surface 210 , and the outer side wall 230 of the windward body 200 is smoothly connected to the second windward surface 220 .

[0074] In this way, the windward body 200 of the balancing block can better guide the refrigerant in front of the windward body 200 to the outer side wall 230 of the balancing body 100, which is beneficial to reducing the fluid resistance of the balancing block.

[0075] Optionally, the inner side wall 240 of the windward body 200 is smoothly connected to the first windward surface 210 , and the inner side wall 240 of the windward body 200 is smoothly connected to the second windward surface 220 .

[0076] In this way, the windward body 200 of the balancing block can better guide the refrigerant in front of the windward body 200 to the inner wall 240 of the balancing body 100, which is beneficial to reducing the fluid resistance of the balancing block.

[0077] Optionally, a projection of the first windward surface 210 on the plane where the first end surface 110 is located is larger than a projection of the second windward surface 220 on the plane where the second end surface 120 is located.

[0078] When the compressor rotor rotates, the refrigerant located in front of the second windward surface 220 moves downward under the guidance of the second windward surface 220, that is, toward the dead angle formed between the balancing body 100 and the windward body 200. If the area of ​​the second windward surface 220 is large, it is not conducive to the windward body 200 to rectify the refrigerant. The projection of the second windward surface 220 of the windward body 200 on the plane where the first end face 110 is located is the second projection, and the projection of the first windward surface 210 of the windward body 200 on the plane where the first end face 110 is located is the first projection, and the area of ​​the first projection is greater than the area of ​​the second projection. In this way, on the one hand, the windward body 200 mainly guides the refrigerant to flow along the balancing block by the first windward surface 210, which can reduce the fluid resistance of the balancing block. In addition, the height of the first windward surface 210 protruding from the first end surface 110 and the height of the second windward surface 220 protruding from the first end surface 110, the area of ​​the first projection is greater than the area of ​​the second projection, and the overall slope of the first windward surface 210 is smaller than the overall slope of the second windward surface 220, which can further improve the diversion effect of the first windward surface 210.

[0079] Optionally, the first windward surface 210 includes a first section 211 , a second section 212 and a third section 213 in sequence from the first end to the second end, and the slope of the second section 212 is greater than the slopes of the first section 211 and the third section 213 .

[0080] The first windward surface 210 includes a first section 211, a second section 212 and a third section 213 connected in sequence from top to bottom. The slope of the second section 212 of the first windward surface 210 is greater than the slopes of the first section 211 and the third section 213 of the first windward surface 210. The slope is based on the top plane of the balancing body 100, and can be considered as the angle between the first windward surface 210 and the top plane of the balancing body 100. The smaller the slope, the gentler the first windward surface 210 is at this position; the larger the slope, the steeper the first windward surface 210 is at this position. The first section 211 and the third section 213 of the first windward surface 210 are both generally in a direction parallel to the top plane of the balancing body 100, and the third section 213 of the first windward surface 210 is more in a direction parallel to the first end surface 110 of the balancing body 100 than the first section 211 and the second section 212.

[0081] When the rotor of the compressor rotates, the balancing block rotates. The high-temperature gaseous refrigerant inside the compressor acts as the flow medium of the balancing block, generating resistance that inhibits the rotation of the rotor, that is, fluid resistance. When the high-temperature gaseous refrigerant hits the balancing block head-on, a laminar connection layer is formed on the third section 213 of the first windward surface 210. When moving along the third section 213 of the first windward surface 210 to the second section 212 of the first windward surface 210, the laminar boundary layer becomes thinner in the second section 212 of the first windward surface 210 due to the change in slope. When flowing along the second section 212 of the first windward surface 210 to the first section 211, a part of the refrigerant forms a wake vortex and separates from the laminar boundary layer. That is, the increase and separation of the wake vortex mainly occur at the location of the first section 211 of the first windward surface 210. The remaining refrigerant continues to move toward the top plane of the balancing body 100 along the first section 211 of the first windward surface 210. Since the slope of the first section 211 of the balancing body 100 is small, the flow of the gaseous refrigerant is relatively smooth, and a relatively stable laminar boundary layer can be formed on the top plane of the balancing body 100.

[0082] When using the balancing block provided in the embodiment of the present disclosure, the refrigerant's tail vortex and separation at the balancing block occur near the windward body 200, the thickness of the top plane laminar boundary layer of the balancing body 100 is small and the flow is relatively stable. Since the size of the balancing body 100 is significantly larger than that of the windward body, reducing the flow resistance of the balancing body 100 can reduce the flow resistance of the balancing block as a whole.

[0083] Optionally, the first section 211 and the second section 212 of the first windward surface 210 transition smoothly.

[0084] The greater the sudden change of the second section 212 of the first windward surface 210, the more obvious the separation of the wake and the laminar boundary layer formed above the first section 211 of the first windward surface 210. If the wake vortex and boundary layer formed above the first windward surface 210 are too separated, it will affect the laminar flow formed by the gaseous refrigerant on the top plane of the balancing body 100. The smooth transition between the first windward surface 210 and the first section 211 and the second section 212 is conducive to the formation of a stable laminar boundary layer of the refrigerant on the top end surface of the balancing body 100.

[0085] Optionally, the first section 211 of the first windward surface 210 is convex upward, and the second section 212 of the first windward surface 210 is concave downward.

[0086] The first section 211 of the first windward surface 210 bulges upward, which means that the first section 211 of the first windward surface 210 is located outside the plane formed by connecting its upper and lower ends. The first section 211 of the first windward surface 210 bulges upward, which is conducive to the smooth transition of the refrigerant from the first section 211 of the first windward surface 210 to the upper end surface of the balancing body 100.

[0087] The second section 212 of the first windward surface 210 is concave downward, which means that the second section 212 of the first windward surface 210 is located within a plane formed by connecting its upper and lower ends. The second section 212 of the first windward surface 210 is concave downward, which is conducive to the separation of part of the refrigerant from the laminar boundary layer above the first section 211 when flowing from the second section 212 of the first windward surface 210 to the first section 211 of the first windward surface 210.

[0088] Optionally, a projection area of ​​the second section 212 of the first windward surface 210 on the first end surface 110 is greater than a projection area of ​​the first section 211 of the first windward surface 210 on the first end surface 110 .

[0089] The projection area of ​​each part of the first windward surface 210 on the first end surface 110 of the balancing body 100 is positively correlated with the size of each part of the first windward surface 210 in the vertical direction. The first section 211 of the first windward surface 210 has a smaller size in the vertical direction, which is conducive to the smooth transition of the refrigerant from the windward body 200 to the balancing body 100; the second end of the first windward surface 210 has a larger size in the vertical direction, which is conducive to guiding the laminar refrigerant formed in the third section 213 of the first windward surface 210 to the first section 211 of the first windward surface 210, thereby making the flow of the refrigerant at the top of the balancing body 100 more stable, further reducing the fluid resistance of the balancing block.

[0090] Optionally, the slope of the third section 213 of the first windward surface 210 is greater than the slope of the first section 211 of the first windward surface.

[0091] The third section 213 of the first windward surface 210, as the front end of the windward body 200, first contacts the high-temperature gaseous refrigerant and rectifies the high-temperature gaseous refrigerant into laminar flow. The first section 211 of the first windward surface 210 cooperates with the second section 212 to separate part of the refrigerant in advance by forming microflows, and guides the other part of the gaseous refrigerant to flow in a laminar form to the top plane of the balancing body 100. The third section 213 of the first windward body 200 has a larger slope, which can better play a rectifying role; the first section 211 of the first windward body 200 has a smaller slope, which is conducive to the smooth transition of the refrigerant from the windward body 200 to the top plane of the balancing body 100.

[0092] Optionally, the length of the third section 213 of the first windward surface 210 is greater than the length of the first section 211 of the first windward surface 210 .

[0093] The third section 213 of the first windward surface 210, as the front end of the windward body 200, first contacts the high-temperature gaseous refrigerant and rectifies the high-temperature gaseous refrigerant into laminar flow. The first section 211 of the first windward surface 210 cooperates with the second section 212 to separate part of the refrigerant in advance by forming microflows, and guides the other part of the gaseous refrigerant to flow in a laminar form to the top plane of the balancing body 100. The third section 213 of the first windward body 200 is relatively long, which can better play a rectifying role; the first section 211 of the first windward body 200 is relatively short, which is conducive to the smooth transition of the refrigerant from the windward body 200 to the top plane of the balancing body 100.

[0094] Optionally, a projection area of ​​the third section 213 of the first windward surface 210 on the plane where the first end surface 110 is located is larger than a projection area of ​​the first section 211 of the first windward surface 210 on the plane where the first end surface 110 is located.

[0095] The third section 213 of the first windward surface 210 has a larger projection area on the plane where the first end surface 110 is located, and the dimension in the axial direction of the balancing body 100 is larger, and the third section 213 of the first windward surface 210 has a more obvious drainage and guiding effect on the refrigerant directly in front of the windward body 200. The first section 211 of the first windward surface 210 has a smaller projection area on the plane where the first end surface 110 is located, and the dimension in the axial direction of the balancing body 100 is smaller, and the first section 211 of the first windward surface 210 has a less obvious drainage and guiding effect on the refrigerant directly in front of the windward body 200, which is conducive to the smooth transition of the refrigerant from the windward body 200 to the top plane of the balancing body 100.

[0096] As a way to form the surface profile of the windward body, optionally, combining Figure 5 As shown, the normal direction of the first end surface is taken as the Y axis, and a straight line which is parallel to the axial direction of the balancing body and intersects with the Y axis is taken as the X axis. The surface profile of the windward body satisfies the following formula:

[0097] Y=a1X 5 +a2X 4 +a3X 3 +a4X 2 +a5X

[0098] Among them, the value range of X is 0≤X≤D, D is the axial thickness of the balancing body, and a1, a2, a3, a4, and a5 are the contour shape coefficients of the windward body.

[0099] By adopting the above formula, a surface profile satisfying the above shape characteristics can be better formed, which is beneficial to the design and manufacture of the balancing weight.

[0100] Optionally, -18≤a1≤-17, 31≤a2≤33, -13≤a3≤-11, -8≤a4≤-7, 4≤a5≤5.

[0101] With such parameter selection, the fluid resistance of the balancing block is small in the simulation test.

[0102] As a way to form the surface profile of the windward body, optionally, combining Figure 7 As shown, the normal direction of the first end surface is taken as the X-axis, and a straight line of the first end surface parallel to the axial direction of the balancing body and intersecting with the X-axis is taken as the Y-axis. The first section of the first windward surface satisfies the following formula:

[0103]

[0104] The surface profile of the third section of the first windward surface satisfies the following formula:

[0105] (X c -δD) 2 +(Y c -D(1-δ) 2 =((1-δ)D) 2

[0106] Among them, D is the axial thickness of the main balancing body, and δ is the center positioning coefficient.

[0107] By adopting the above formula, a surface profile satisfying the above shape characteristics can be better formed, which is beneficial to the design and manufacture of the balancing weight.

[0108] Optionally, δ=0.618.

[0109] By selecting such parameters, the fluid resistance of the balancing block is small in the simulation experiment.

[0110] Optionally, the second section of the first windward surface is connected to the first section of the first windward surface and the third section of the first windward surface, and satisfies the following formula:

[0111] 1 / (D*Dr)≤ρ<∞

[0112] Wherein, ρ is the curvature of the second section of the first windward surface, and Dr is the curvature coefficient.

[0113] With such an arrangement, the first section and the third section of the first windward body can be connected in a smoother transition, which is beneficial to reducing the fluid resistance of the balancing block.

[0114] Optionally, 0.344≤Dr, and the slope of the common tangent line between the second section and the third section of the first windward surface is 0.

[0115] By selecting such parameters, the fluid resistance of the balancing block is small in the simulation experiment.

[0116] As a way to form the surface profile of the windward body, optionally, combining Figure 6 As shown, with the normal direction of the first end surface as the X-axis, and a straight line of the first end surface parallel to the axial direction of the balancing body and intersecting the X-axis as the Y-axis, the surface profile of the first section of the first windward surface satisfies the following formula:

[0117] X1=a1cosθ1

[0118] Y1=D-b1(1-sinθ1)

[0119] The surface profile of the third section of the first windward surface satisfies the following formula:

[0120] X2=a2cosθ2

[0121] Y2=b2(1+sinθ2)

[0122] Where D is the axial thickness of the balancing body, a1, b1, a2 and b2 are the windward body contour shape coefficients.

[0123] Optionally, 2*b1+b2=D, D is the axial thickness of the balancing body; 0.1≤b2 / D≤0.4; 0.15≤a1 / a2≤0.95; 2.5≤a2 / b2≤5; b1≤a1; 0≤θ1≤π / 2; π / 2≤θ2≤π.

[0124] By selecting such parameters, the fluid resistance of the balancing block is small in the simulation experiment.

[0125] Optionally, if the slope of the common tangent line between the first segment of the first windward surface and the third segment of the first windward surface is k1, the slope of the common tangent line between the first segment of the first windward surface and the second segment of the first windward surface is k2, the slope of the common tangent line between the third segment of the first windward surface and the second segment of the first windward surface is k3, and the slope of the tangent line at any point on the second segment of the first windward surface is k4, then:

[0126] k1≤k2<∞;

[0127] 0<k3≤k1;

[0128] k3≤k4≤k2.

[0129] By selecting such parameters, the fluid resistance of the balancing block is small in the simulation experiment.

[0130] Optionally, the second windward surface 220 of the windward body 200 includes a first part and a second part, the surface contour of the first part and the third part of the first windward surface 210 are constrained by the same formula, the top end of the second part is smoothly connected to the bottom end of the first part, and the bottom end of the second part is smoothly connected to the bottom end of the first end surface 110.

[0131] The third section 213 of the first windward surface 210 and the first part of the second windward surface 220 are the highest parts protruding outward from the windward body 200, and the lines between the two are relatively smooth, which can better guide the refrigerant in front of the windward body 200 to the upper and lower side walls of the windward body 200.

[0132] Optionally, the other end of the balancing body 100 along the circumferential direction is a second end face 120; the balancing block also includes a leeward body 300, which protrudes outward from the second end face 120 of the balancing body 100 along the circumferential direction of the balancing body 100, and the distance that the leeward body 300 protrudes from the second end face 120 is greater than the distance that the windward body 200 protrudes outward from the first end face 110.

[0133] The rotation direction of the rotor of the rotary compressor is fixed. After the balancing block is correctly assembled to the rotor, the first end face 110 of the balancing body 100 is always the windward side, and the second end face 120 is always the leeward side. The leeward body 300 is arranged on the second end face 120 of the balancing body 100, that is, the leeward side.

[0134] When the refrigerant flows backward along the top end surface of the balancing body 100, the laminar boundary layer separates and forms a tail vortex behind the second end surface 120. The distance that the leeward body 300 protrudes from the second end surface 120 is greater than the distance that the windward body 200 protrudes from the first end surface 110, which can reduce the resistance to the rotation of the balancing block caused by the tail vortex and the separation of the laminar boundary layer, thereby reducing the fluid resistance of the balancing block.

[0135] Optionally, the leeward body 300 includes a first leeward surface 310 and a second leeward surface 320, the first end of the first leeward surface 310 is docked with the top of the second end surface 120, the first end of the second leeward surface 320 is docked with the bottom end of the second end surface 120, the second end of the first leeward surface 310 is connected to the second end of the second leeward surface 320, and the docking position is the highest point of the leeward body 300 protruding from the second end surface 120.

[0136] The leeward body 300 includes a first leeward surface 310 and a second leeward surface 320. The first leeward surface 310 is inclined downwardly from the top of the second end surface 120, and the second leeward surface 320 is inclined upwardly from the bottom of the second end surface 120 and connected to the first leeward surface 310. The connection position of the first leeward surface 310 and the second leeward surface 320 is the highest point of the leeward body 300 protruding outward from the second end surface 120.

[0137] When the rotor of the compressor rotates, the top plane, the inner plane and the outer plane of the balancing section are all separated by laminar boundary layers. The leeward body 300 includes a first leeward surface 310 and a second leeward surface 320, which is conducive to reducing the resistance of the windward body caused by the tail vortex on each surface of the balancing body 100, thereby reducing the fluid resistance of the balancing block.

[0138] Optionally, a projection area of ​​the first leeward surface 310 on the plane where the second end surface 120 is located is greater than a projection area of ​​the second leeward surface 320 on the plane where the second end surface 120 is located.

[0139] The projection of the first leeward surface 310 of the leeward body 300 on the plane where the second end surface 120 is located is the third projection, and the projection of the second leeward surface 320 of the leeward body 300 on the plane where the second end surface 120 is located is the fourth projection, and the area of ​​the third projection is greater than the area of ​​the fourth projection. The height of the first leeward surface 310 protruding from the second end surface 120 is the same as the height of the second leeward surface 320 protruding from the second end surface 120, and the area of ​​the third projection is greater than the area of ​​the fourth projection, then the overall slope of the first leeward surface 310 is smaller than the overall slope of the second leeward surface 320. With such a setting, the obstruction of the rotation of the balancing block caused by the tail vortex of the leeward body 300 on multiple planes of the balancing body 100 can be reduced.

[0140] An embodiment of the present disclosure provides a rotary compressor, which includes a shell, a rotor and the above-mentioned balancing block, wherein the shell is configured with a accommodating space; the rotor is rotatably arranged in the accommodating space; and the above-mentioned balancing block is installed at the top end and / or the bottom end of the rotor.

[0141] When the balancing block is set at the top end of the compressor rotor, the bottom of the balancing block is attached to the top surface of the rotor; when the balancing block is set at the bottom end of the rotor compressor, the bottom end of the balancing block is attached to the bottom surface of the rotor.

[0142] By using the rotor compressor provided by the embodiment of the present disclosure, the rotational resistance of the rotor is smaller, and the refrigerant oil is not easily thrown out of the compressor during operation.

[0143] An embodiment of the present disclosure provides a rotary compressor, which includes a shell, a rotor and the above-mentioned balancing block, wherein the shell is configured with a accommodating space; the rotor is rotatably arranged in the accommodating space; and the above-mentioned balancing block is installed at the top end and / or the bottom end of the rotor.

[0144] 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 balancing weight for a compressor, characterized in that: include: A balancing body, adapted to be arranged at the top end or the bottom end of the compressor rotor, wherein one end of the balancing body along the circumferential direction is a first end surface; The windward body protrudes outward from the first end face of the balancing body along the circumferential direction of the balancing body, and the windward body includes a first windward surface, which extends obliquely downward from the top of the first end face. The angle between the outer wall of the windward body and the first end face is less than 90 degrees, and the second angle between the inner wall of the windward body and the first end face is less than 90 degrees.

2. The balancing weight according to claim 1, characterized in that: The thickness of the balancing body in the axial direction is smaller than the width in the radial direction.

3. The balancing weight according to claim 1 or 2, characterized in that: The windward body also includes a second windward surface, wherein the first end of the first windward surface is connected to the top of the first end surface, the first end of the second windward surface is connected to the bottom of the first end surface, the second end of the first windward surface is connected to the second end of the second windward surface, and the connection position is the highest point of the windward body protruding from the first end surface.

4. The balancing weight according to claim 3, characterized in that: The outer side wall of the windward body is smoothly connected to the first windward surface, and the outer side wall of the windward body is smoothly connected to the second windward surface; and / or; The inner side wall of the windward body is smoothly connected to the first windward surface, and the inner side wall of the windward body is smoothly connected to the second windward surface.

5. The balancing weight according to claim 3, characterized in that: A projection of the first windward surface on the plane where the first end surface is located is larger than a projection of the second windward surface on the plane where the first end surface is located.

6. The balancing weight according to claim 1, characterized in that: The first windward surface includes a first section, a second section and a third section from the first end to the second end, and the slope of the second section is greater than the slopes of the first section and the third section.

7. The balancing weight according to claim 6, characterized in that: The slope of the third section of the first windward surface is greater than the slope of the first section of the first windward surface.

8. A rotary compressor, characterized in that: include: A housing is configured with an accommodating space; A rotor rotatably disposed in the accommodating space; and, The balancing weight according to any one of claims 1 to 7 is mounted on the top end and / or the bottom end of the rotor.

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