Balance block for reducing flow hysteresis resistance, dynamic balance assembly and compressor

Abstract

The utility model provides a balancing block for reducing flow hysteresis resistance, a dynamic balance assembly and a compressor, the balancing block comprises a base and a counterweight part, the base comprises a first connecting part with a crankshaft hole in the middle and a second connecting part surrounding the first connecting part, the balance weight part extends outwards from the upper end face of the second connecting part in the axial direction of the crankshaft hole, the two ends of the balance weight part are a first windward face and a first leeward face respectively, the upper end face of the second connecting part serves as a first plane, and the horizontal projection of the balance weight part falls into the first plane. According to the balance block capable of reducing the flow hysteresis resistance, through cooperation of the base and the balance weight part, the area of the windward side can be effectively reduced, and then the generated flow hysteresis resistance is reduced. The balance block capable of reducing the flow hysteresis resistance is simple in overall structure, and the problem that in the prior art, when a balance block rotates, due to the fact that the large windward area is achieved, large flow hysteresis resistance is generated, and additional energy loss is generated in the movement of a compressor is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the compressor technical field, especially to a balance block for reducing flow resistance, a dynamic balance assembly and a compressor. BACKGROUND

[0002] The scroll compressor is through the movement scroll plate relative crankshaft to do the planet motion, in this process, by the movement scroll plate, eccentric crankshaft, main balance block, compressor rotor and lower rotor balance block jointly constitute the dynamic balance system.

[0003] The density of the refrigerant is about 80 times of the conventional air when the compressor rotates at high speed, at this time, the flow resistance caused by the rotation of the balance block is a part of mechanical work that cannot be ignored. The existing main balance block is a semicircular structure, which has a large first windward area when the compressor rotates at high speed, resulting in large flow resistance.

[0004] Therefore, it is necessary to design a balance block for reducing flow resistance to solve the above problems. CONTENT OF THE INVENTION

[0005] Therefore, in order to overcome the defects of the prior art, the utility model provides a balance block for reducing flow resistance, a dynamic balance assembly and a compressor, which effectively solve the problem that the existing main balance block is a semicircular structure, which has a large first windward area when the compressor rotates at high speed, resulting in large flow resistance.

[0006] According to the first aspect of the utility model, a balance block for reducing flow resistance is provided, wherein the balance block for reducing flow resistance comprises a base and a counterweight part, the base comprises a first connecting part with a crankshaft hole in the middle and a second connecting part surrounding the first connecting part, the counterweight part extends outward along the axial direction of the crankshaft hole from the upper end face of the second connecting part, the two ends of the counterweight part are respectively a first windward face and a first leeward face, the upper end face of the second connecting part is a first plane, and the horizontal projection of the counterweight part falls in the first plane.

[0007] Preferably, the second connecting part partially surrounds the outer peripheral wall of the first connecting part, the second connecting part extends outward along the radial direction of the crankshaft hole from the outer peripheral wall of the first connecting part, and a chamfer is arranged at the connection between the second connecting part and the first connecting part.

[0008] Preferably, the outer side wall of the counterweight part coincides with part of the outer side wall of the second connecting part, and the first windward face and the first leeward face are formed as arc faces.

[0009] Preferably, the counterweight part comprises a first inner arc part and a first outer arc part opposite to each other, the first outer arc part comprises a first outer arc, a second outer arc and a third outer arc connected to each other, the first inner arc part is arranged concentrically with the third outer arc, the first inner arc part is connected with the first outer arc through an end surface of the counterweight part, and one end of the first outer arc close to an end of the counterweight part is closer to the crankshaft hole than the other end of the first outer arc.

[0010] Preferably, the balance block for reducing flow resistance is formed in a symmetrical structure.

[0011] According to the second aspect of the present application, a dynamic balance assembly is provided, wherein the dynamic balance assembly comprises the balance block for reducing flow resistance as described above, and a first rotor balance block and a second rotor balance block arranged at two ends of the rotor body.

[0012] Preferably, the first rotor balance block and the second rotor balance block are formed in a symmetrical structure.

[0013] Preferably, the two ends of the first rotor balance block and the two ends of the second rotor balance block are formed into a second windward surface and a second leeward surface respectively; the second windward surface and the second leeward surface are planes.

[0014] Preferably, the first rotor balance block and the second rotor balance block each comprise a second inner arc part and a second outer arc part, the second outer arc part comprises a fourth outer arc, a fifth outer arc and a sixth outer arc connected to each other, the second inner arc part is arranged concentrically with the sixth outer arc, and the second inner arc part is connected with the fourth outer arc through an end of the first rotor balance block or an end of the second rotor balance block; one end of the fourth outer arc close to the end of the first rotor balance block or the end of the second rotor balance block is closer to a middle part of the first rotor balance block or the second rotor balance block than the other end of the fourth outer arc.

[0015] According to the third aspect of the present application, a compressor is provided, wherein the compressor comprises the dynamic balance assembly as described above.

[0016] The balance block of reducing flow drag force according to the utility model, through the cooperation of base and counterweight part, can effectively reduce the area of windward surface, and further reduce the generated flow drag force.

[0017] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are referred to for detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 The structure schematic diagram of the balance block of reducing flow drag force according to the embodiment of the utility model is shown;

[0020] Figure 2 The top view of the balance block of reducing flow drag force according to the embodiment of the utility model is shown;

[0021] Figure 3 The structure schematic diagram of the first rotor balance block according to the embodiment of the utility model is shown;

[0022] Figure 4 The top view of the first rotor balance block according to the embodiment of the utility model is shown;

[0023] Figure 5 The structure schematic diagram of the compressor according to the embodiment of the utility model is shown.

[0024] Reference numerals: 1 - main balance block; 101 - base; 102 - counterweight part; 103 - crankshaft hole; 104 - first connecting part; 105 - second connecting part; 106 - first windward surface; 107 - first leeward surface; 108 - first inner arc part; 109 - first outer arc; 110 - second outer arc; 111 - third outer arc; 2 - first rotor balance block; 3 - second rotor balance block; 401 - second windward surface; 402 - second leeward surface; 403 - second inner arc part; 404 - fourth outer arc; 405 - fifth outer arc; 406 - sixth outer arc; 5 - rotor body; 6 - crankshaft body. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] In the description of the embodiments of the present application, it should be noted that the terms “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer”, and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms “first”, “second”, “third”, and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms “horizontal”, “vertical”, and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, “horizontal” only means that it is more horizontal relative to “vertical”, and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] According to a first aspect of this utility model, a balance block for reducing flow resistance is provided, such as... Figure 1 and Figure 2 As shown, this balance block for reducing flow resistance is used in a scroll compressor, which may include, for example... Figure 5 The crankshaft body 6 shown is equipped with a counterweight for reducing flow resistance. This counterweight, through structural design improvements, further reduces flow resistance and decreases additional energy consumption during high-speed rotation of the scroll compressor. The counterweight includes a base 101 and a counterweight 102.

[0030] In the following description, reference will be made to Figure 1 and Figure 2 The detailed structure of the base 101 and counterweight 102 of the balance block for reducing flow resistance is described in detail.

[0031] like Figure 1 and Figure 2 As shown, in this embodiment, the balance block that reduces flow resistance is connected to the crankshaft body 6 via a base 101. Specifically, the base 101 includes a first connecting portion 104 and a second connecting portion 105. The second connecting portion 105 surrounds the first connecting portion 104 so that the shape of the base 101 approximates a triangle. That is, it can be understood that... Figure 2 From a top-down view, the first connecting portion 104 can be formed into a circle, while the second connecting portion 105 surrounding the first connecting portion 104 can be formed into an approximately crescent shape. This arrangement can reduce the frontal area of ​​the balance block when the crankshaft body 6 makes eccentric movements, effectively reducing the resulting flow resistance. A crankshaft hole 103 for connecting with the crankshaft body 6 is provided in the middle of the first connecting portion 104.

[0032] Furthermore, the counterweight 102 extends outward from the upper end face of the second connecting part 105 along the axial direction of the crankshaft hole 103. This outward extension can be understood as extending towards... Figure 1 The counterweight 102 extends upwards from the base 101, causing it to protrude beyond the base 101. The two ends of the counterweight 102 are a first windward side 106 and a first leeward side 107, respectively. Thus, with... Figure 1In the view of the reduced flow resistance balance block, when the reduced flow resistance balance block is arranged on the crankshaft body 6 and rotates with the crankshaft body 6, the side of the reduced flow resistance balance block in contact with air is the first windward surface 106 with a smaller area, so that the area of the windward surface can be effectively reduced, and the generated flow resistance can be reduced. In order to ensure smooth rotation and reduce flow resistance, the upper end surface of the second connecting portion 105 is a first plane, and the horizontal projection of the counterweight portion 102 falls in the first plane, that is, from the side of the first connecting portion 104, the horizontal projection of the counterweight portion 102 does not exceed the horizontal projection of the second connecting portion 105, and the counterweight portion 102 does not protrude outward beyond the second connecting portion 105. Figure 1 As can be seen from the figure, the counterweight portion 102 does not protrude outward beyond the second connecting portion 105, and does not generate additional flow resistance.

[0033] The reduced flow resistance balance block can effectively reduce the area of the windward surface through the cooperation of the base 101 and the counterweight portion 102, and further reduce the generated flow resistance. Since the counterweight portion 102 is arranged at the upper end surface of the base 101, the area of the first windward surface 106 on the windward end is small, and since the counterweight portion 102 does not protrude outward beyond the horizontal projection of the second connecting portion 105, additional flow resistance will not be generated due to the change in structure. The overall structure of the reduced flow resistance balance block is simple, and the problem of the existing technology that the balance block rotates due to the large windward area and generates large flow resistance, which causes additional energy loss of the movement of the compressor, is solved.

[0034] Preferably, as shown in Figure 1 and Figure 2 in the embodiment, the second connecting portion 105 partially surrounds the outer peripheral wall of the first connecting portion 104, the second connecting portion 105 does not completely surround the first connecting portion 104, and the part of the end portion of the first connecting portion 104 close to the crankshaft body 6 is not covered by the second connecting portion 105. This arrangement can effectively improve the weight distribution on the basis of ensuring the connection strength with the crankshaft body 6, so that the reduced flow resistance balance block can effectively reduce the flow resistance on the basis of meeting the eccentric rotation movement.

[0035] Further, the second connecting portion 105 extends outward along the radial direction of the crankshaft hole 103 from the outer peripheral wall of the first connecting portion 104, and a chamfer is arranged at the connection between the second connecting portion 105 and the first connecting portion 104. The chamfer makes the first connecting portion 104 and the second connecting portion 105 smoothly transition, further reducing the flow resistance at the connection.

[0036] Preferably, as shown in Figure 1 and Figure 2 in the embodiment, the outer side wall of the counterweight portion 102 coincides with part of the outer side wall of the second connecting portion 105, as shown in Figure 2As shown, the outer wall of the counterweight 102, which is formed into an approximately crescent shape, is in contact with the outer wall of the second connecting part 105. That is, the counterweight 102 mentioned above does not exceed the horizontal projection range of the second connecting part 105. This arrangement will not generate additional flow resistance.

[0037] Furthermore, the first windward surface 106 and the first leeward surface 107 are formed as arc surfaces. The formation of the windward and leeward surfaces as arc surfaces can effectively reduce the area of ​​the windward surface, improve the eccentric rotational motion, and at the same time reduce the flow resistance.

[0038] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the counterweight 102 may include a first inner arc portion 108 and a first outer arc portion facing away from each other, connected by a first windward surface 106 and a first leeward surface 107. Specifically, the first outer arc portion includes a first outer arc 109, a second outer arc 110, and a third outer arc 111 connected to each other, as shown in the figure. Figure 2 As shown, the first outer arc portion has a symmetrical structure, and therefore actually includes two first outer arcs 109, two second outer arcs 110, and two third outer arcs 111. In this embodiment, one is described as an example. The first inner arc portion 108 and the third outer arc 111 are concentrically arranged. Both the first inner arc portion 108 and the third outer arc 111 can be formed as arcs, and these two arcs are concentrically arranged.

[0039] Furthermore, the first inner arc portion 108 is connected to the first outer arc portion 109 through the end face of the counterweight portion 102 (i.e., the first windward surface 106 and the first leeward surface 107). The end of the first outer arc portion 109 that is closer to the counterweight portion 102 is closer to the crankshaft hole 103 than the other end of the first outer arc portion 109, which can better reduce the flow resistance when the balance block rotates.

[0040] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the balance block for reducing flow resistance is formed as a symmetrical structure, which enables rotational stability and helps to reduce flow resistance.

[0041] Preferably, in the embodiment, the base 101 and the counterweight 102 can be an integrally formed structure.

[0042] The balance block for reducing flow drag force can effectively reduce the area of the windward surface and in turn reduce the generated flow drag force by the cooperation of the base and the counterweight part. Since the counterweight part is arranged at the upper end surface of the base, the area of the first windward surface on the windward end is small, and since the counterweight part does not exceed the horizontal projection range of the second connecting part, no additional flow drag force is generated due to the change in structure. The balance block for reducing flow drag force has a simple overall structure, solves the problem that in the prior art, when the balance block rotates, a large flow drag force is generated due to a large windward area, and makes the movement of the compressor generate additional energy loss.

[0043] In addition, as shown in Figure 3 and Figure 4 , according to the second aspect of the utility model, a dynamic balance assembly is provided, which comprises the balance block for reducing flow drag force, the first rotor balance block 2 and the second rotor balance block 3 as described above.

[0044] The dynamic balance assembly is also used in a scroll compressor for assisting eccentric movement. As shown in Figure 5 , the scroll compressor can further comprise a rotor body 5, and a crankshaft body 6 is arranged through the rotor body 5. For ease of description, the above-mentioned balance block for reducing flow drag force is a main balance block 1 in Figure 5 , the main balance block 1 is sleeved on the upper part of the crankshaft body 6, and the first rotor balance block 2 and the second rotor balance block 3 are arranged at the upper and lower ends of the rotor body 5 respectively.

[0045] Preferably, as shown in Figure 3 and Figure 4 , in the embodiment, the first rotor balance block 2 and the second rotor balance block 3 are both formed in a symmetrical structure, which can make the rotation stable and be conducive to reducing flow drag force. In order to facilitate the balance of the upper and lower ends of the rotor body 5, the shape of the first rotor balance block 2 is the same as that of the second rotor balance block 3, and the thickness of the first rotor balance block 2 can be different from that of the second rotor balance block 3. The user can select appropriate thicknesses of the first rotor balance block 2 and the second rotor balance block 3 according to simulation tests.

[0046] Preferably, as shown in Figure 3 and Figure 4 , in the embodiment, the two ends of the first rotor balance block 2 and the two ends of the second rotor balance block 3 are respectively formed into a second windward surface 401 and a second leeward surface 402. The first rotor balance block 2 and the second rotor balance block 3 can both be formed in a crescent-shaped structure, and the two ends of the crescent-shaped structure are respectively the second windward surface 401 and the second leeward surface 402.

[0047] Further, the second windward surface 401 and the second leeward surface 402 are both formed into planes, which can more effectively reduce flow drag force.

[0048] Preferably, such as Figure 3 and Figure 4 As shown, in this embodiment, both the first rotor balance block 2 and the second rotor balance block 3 include a second inner arc portion 403 and a second outer arc portion. The second inner arc portion 403 is connected to the fourth outer arc 404 through the end of the first rotor balance block 2 or the end of the second rotor balance block 3, that is, the second inner arc portion 403 is connected to the second outer arc portion through the second windward surface 401 and the second leeward surface 402. The second outer arc portion includes a fourth outer arc 404, a fifth outer arc 405, and a sixth outer arc 406 that are connected to each other.

[0049] Furthermore, the second inner arc portion 403 and the sixth outer arc portion 406 are concentrically arranged, and both the second inner arc portion 403 and the sixth outer arc portion 406 can be formed as arcs, and these two arcs are concentrically arranged.

[0050] Furthermore, one end of the fourth outer arc 404 that is closer to the end of the first rotor balance block 2 or the end of the second rotor balance block 3 is closer to the middle of the first rotor balance block 2 or the middle of the second rotor balance block 3 than the other end of the fourth outer arc 404, so as to better reduce the flow resistance when the balance block rotates.

[0051] During use, this dynamic balancing assembly, through special structural improvements, transforms the original design of one rotor balance block into two rotor balance blocks 2 and 3 located at the upper and lower ends of the rotor body 5, which can further reduce the windward area and reduce flow resistance.

[0052] In addition, see Figure 5 According to a third aspect of this utility model, a compressor is provided, the compressor including the dynamic balancing assembly as described above. By using the dynamic balancing assembly, the compressor can effectively reduce the flow resistance generated by the balance block during eccentric rotational motion, reduce energy loss, and improve compressor performance.

[0053] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A counterbalance for reducing flow resistance, characterized in that The balance block for reducing flow stagnation resistance comprises a base and a counterweight part, the base comprises a first connecting part with a crank hole in the middle and a second connecting part surrounding the first connecting part, the counterweight part extends outward along the axial direction of the crank hole from the upper end surface of the second connecting part, the two ends of the counterweight part are respectively a first windward surface and a first leeward surface, the upper end surface of the second connecting part is a first plane, and the horizontal projection of the counterweight part falls in the first plane.

2. The counterbalance block of claim 1, wherein, The second connecting part partially surrounds the outer peripheral wall of the first connecting part, the second connecting part extends outward along the radial direction of the crank hole from the outer peripheral wall of the first connecting part, and a chamfer is arranged at the connection between the second connecting part and the first connecting part.

3. The counterbalance block of claim 1, wherein, The outer side wall of the counterweight part coincides with part of the outer side wall of the second connecting part. The first windward surface and the first leeward surface are formed as arc surfaces.

4. The counterbalance block of claim 1, wherein, The counterweight part comprises a first inner arc part and a first outer arc part facing away from each other, the first outer arc part comprises a first outer arc, a second outer arc and a third outer arc connected to each other, the first inner arc part is arranged concentrically with the third outer arc, the first inner arc part is connected to the first outer arc through the end surface of the counterweight part, and one end of the end part of the first outer arc close to the counterweight part is closer to the crank hole than the other end of the first outer arc.

5. The counterbalance of claim 1, wherein, The balance block for reducing flow stagnation resistance is formed as a symmetrical structure.

6. A dynamic balancing assembly for a compressor, the compressor including a rotor body, the dynamic balancing assembly comprising: The dynamic balance assembly comprises the balance block for reducing flow stagnation resistance according to any one of claims 1 to 5, and a first rotor balance block and a second rotor balance block arranged at the two ends of the rotor body.

7. A dynamic balancing assembly according to claim 6, wherein, The first rotor balance block has the same shape as the second rotor balance block, and the first rotor balance block and the second rotor balance block are both formed as a symmetrical structure.

8. The dynamic balancing assembly of claim 7, wherein, The two ends of the first rotor balance block and the two ends of the second rotor balance block are respectively formed as a second windward surface and a second leeward surface. The second windward surface and the second leeward surface are planes.

9. The dynamic balancing assembly of claim 7, wherein, The first rotor balance block and the second rotor balance block both comprise a second inner arc part and a second outer arc part, the second outer arc part comprises a fourth outer arc, a fifth outer arc and a sixth outer arc connected to each other, the second inner arc part is arranged concentrically with the sixth outer arc, and the second inner arc part is connected to the fourth outer arc through the end part of the first rotor balance block or the end part of the second rotor balance block. One end of the end part of the fourth outer arc close to the first rotor balance block or the second rotor balance block is closer to the middle part of the first rotor balance block or the second rotor balance block than the other end of the fourth outer arc.

10. A compressor characterized by, The compressor comprises the dynamic balance assembly according to any one of claims 6 to 9.

Images