Multi-stage balance block, balance block assembly and scroll compressor

Abstract

The utility model provides a multi-order counterbalance, counterbalance subassembly and scroll compressor, the multi-order counterbalance includes connecting bottom and extension portion, the extension portion is provided at the one end of connecting bottom, the extension portion includes a plurality of extension blocks, the plurality of extension blocks are provided along the axis direction of connecting bottom in order, and the extension blocks are provided with a plurality of through holes. The outer diameter sizes of the extending blocks sequentially arranged in the axis direction of the connecting bottom are gradually increased. According to the multi-stage balance block, the balance block body can be structurally improved, so that the dynamic balance performance of the scroll compressor is improved, the mass distribution of the balance block body is not single any more, and the mass distribution of the balance block body is closer to a movable disc while the mass of the balance block body is reduced; and the mass of the balance block body required by dynamic balance is reduced, and the rotation mass is reduced, so that the overall power consumption of the scroll compressor is reduced, the energy efficiency of the scroll compressor is improved, and vibration and noise generated by the scroll compressor can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scroll compressors, in particular to a multi-order balance block, a balance block assembly and a scroll compressor. BACKGROUND

[0002] The scroll compressor has a moving scroll plate and an eccentric shaft, and when moving, there are unbalanced rotational inertia and inertia moments. The balance block of the scroll compressor is a part designed to eliminate unbalanced inertia and inertia moments and ensure the dynamic balance of the compressor as a whole. With the gradual increase of market competition, air conditioning system manufacturers also require higher compressor single rotation speed, from 130rps to 160rps or even higher. In addition, the displacement of the scroll compressor is constantly increasing, and the weight of the moving scroll plate is also increasing, which also increases the weight and height of the balance block.

[0003] Due to the increase in the mass and height of the balance block, the crankshaft needs to overcome greater inertia when rotating. This will result in the driving system needing to provide more power, thereby increasing overall power consumption and reducing the energy efficiency of the compressor. Larger balance blocks will generate greater centrifugal force during rotation, which may cause an increase in vibration and noise of the compressor. This not only affects the user experience, but also may adversely affect the long-term reliability of the compressor. In addition, in the traditional compressor layout, to reduce the agitation of the balance block on the refrigeration oil and improve mechanical efficiency, the balance block is mostly placed at the bottom of the rack, away from the back pressure chamber. However, when the balance block is placed at the bottom of the rack, according to the dynamic balance principle, the farther the balance block is from the moving plate, the greater the mass of the balance block required to achieve the same balance effect. This not only increases the material cost, but especially at high load or high speed, the greater mass of the balance block requires more power, increasing the power of the compressor, and at the same time causing vibration and noise.

[0004] Since most scroll compressors use balance blocks with the same diameter in the circumferential direction, i.e. first-order balance blocks, the mass distribution of the balance block is relatively single, and it is not possible to meet the dynamic balance by reducing the mass of the balance block. Therefore, it is not possible to improve the dynamic balance performance by simply increasing or reducing the mass of the balance block.

[0005] Therefore, it is necessary to design a multi-order balance block to solve the above problems. Invention content

[0006] Therefore, in order to overcome the defects of the prior art, the present application provides a multi-order balance block, a balance block assembly and a scroll compressor, which effectively solves the problem of the prior art that the balance block cannot improve the dynamic balance performance by simply increasing or reducing the mass of the balance block due to structural reasons.

[0007] The utility model discloses a multi -step balance block, wherein the multi -step balance block includes connecting bottom and extension, the extension is set to one end of connecting bottom, the extension includes a plurality of extension blocks, a plurality of the extension blocks are sequentially arranged along the axis direction of connecting bottom, and the outer diameter size of a plurality of the extension blocks sequentially arranged along the axis direction of connecting bottom gradually increases.

[0008] Preferably, the connecting bottom includes a support block and a connecting block connected to each other, the support block is connected with the extension, and a first matching hole is formed at the connection of the support block and the connecting block.

[0009] Preferably, the plurality of extension blocks are formed into a semicircular structure.

[0010] According to the second aspect of the utility model, a balance block assembly is provided, wherein the balance block assembly includes the multi-step balance block, a crankshaft and a balance block cover as described above, the multi-step balance block is sleeved on the crankshaft, and the balance block cover is sleeved on the multi-step balance block.

[0011] Preferably, the balance block cover is provided with a containing groove, the multi-step balance block is contained in the containing groove, and a second matching hole connected with the crankshaft is formed in the groove bottom of the containing groove.

[0012] Preferably, the containing groove includes a plurality of step portions, the plurality of step portions are sequentially arranged along the axis direction of the groove bottom of the containing groove, each step portion protrudes outward in the radial direction of the containing groove, and the plurality of step portions are one-to-one corresponding to the plurality of extension blocks.

[0013] Preferably, the plurality of step portions are formed into an annular structure.

[0014] Preferably, a plurality of flow guide holes are further formed in the circumferential side of the second matching hole.

[0015] Preferably, an axial shoulder portion matched with the second matching hole is arranged on the outer wall of the crankshaft, and the axial shoulder portion protrudes outward in the radial direction of the crankshaft from the outer wall of the crankshaft.

[0016] According to the third aspect of the utility model, a scroll compressor is provided, wherein the scroll compressor includes the balance block assembly as described above.

[0017] According to the multi-stage balance block of the utility model, through the cooperation of the connecting bottom and the extension part, the balance block body can be improved in structure, and the dynamic balance performance of the scroll compressor is improved; through the multiple extension blocks with different sizes arranged along the axial direction of the connecting bottom, the mass distribution of the balance block body is no longer single, and the mass distribution of the balance block body is closer to the dynamic disc while reducing the mass of the balance block body, the mass required for dynamic balance is reduced, the rotary mass is reduced, the overall power consumption of the scroll compressor is reduced, the energy efficiency of the scroll compressor is improved, and the vibration and noise of the scroll compressor caused by the increase of the mass of the balance block in the original structure can also be effectively avoided.

[0018] In order to make the above-mentioned purposes, 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 described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0019] 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 on 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.

[0020] Figure 1 The front view of the multi-stage balance block according to the embodiment of the utility model is shown;

[0021] Figure 2 The bottom view of the multi-stage balance block according to the embodiment of the utility model is shown;

[0022] Figure 3 The sectional view of the multi-stage balance block according to the embodiment of the utility model is shown;

[0023] Figure 4 The bottom view of the balance block cover according to the embodiment of the utility model is shown;

[0024] Figure 5 The sectional view of the balance block cover according to the embodiment of the utility model is shown;

[0025] Figure 6 The top view of the connecting structure of the multi-stage balance block and the balance block cover according to the embodiment of the utility model is shown;

[0026] Figure 7 The sectional view of the multi-stage balance block and the balance block cover according to the embodiment of the utility model is shown;

[0027] Figure 8 The front view of the balance block assembly according to the embodiment of the utility model is shown;

[0028] Figure 9 A cross-sectional view of the balance block assembly according to an embodiment of the present application is shown.

[0029] Figure 10 An exploded view of the balance block assembly according to an embodiment of the present application is shown.

[0030] Figure 11 A connection structure diagram of the balance block assembly and the static disc according to an embodiment of the present application is shown.

[0031] Figure 12 A cross-sectional view of the balance block assembly and the static disc according to an embodiment of the present application is shown.

[0032] Reference signs: 1-balance block body; 101-connection bottom; 102-first extension block; 103-second extension block; 104-first matching hole; 105-support block; 106-connection block; 2-crankshaft body; 201-shaft shoulder; 3-balance block cover body; 301-first step portion; 302-second step portion; 303-receiving groove; 304-second matching hole; 305-flow guide hole; 306-resistance welding protrusion; 4-static disc; 5-upper support. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the 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 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 labor are within the scope of protection of the present application.

[0034] 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 commonly placed when the product of the application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying 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.

[0035] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] 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.

[0037] According to a first aspect of this utility model, a multi-stage balancing block is provided, such as... Figures 1 to 3 As shown, this multi-stage balance block is used in a scroll compressor. By modifying the structure of the balance block itself, the operating requirements of the scroll compressor can be met while avoiding increasing the mass of the balance block. The multi-stage balance block includes a connecting bottom 101 and an extension.

[0038] In the following description, reference will be made to Figures 1 to 3 The detailed structure of the connecting bottom 101 and the extension of the multi-stage balance block is described in detail. In addition, to avoid redundancy due to repeated reference numerals, in the description of the embodiment, the balance block body 1 refers to the multi-stage balance block, the crankshaft body 2 refers to the crankshaft, and the balance block cover body 3 refers to the balance block cover.

[0039] like Figures 1 to 3 As shown, in this embodiment, the "multi-stage" in the multi-stage balance block can be understood as having multiple different diameter variations along the axial direction of the balance block body 1. Specifically, the balance block body 1 needs to cooperate with the crankshaft body 2 described below, therefore... Figure 1 From the main viewpoint, the balance block body 1 can be formed as an approximate cylindrical structure. The cylindrical structure has three directions: radial, axial, and circumferential. The following dimensional descriptions are based on these three directions. The connecting bottom 101 can be understood as one of several variations in diameter, and can be understood as the bottom foundation of the balance block body 1. The balance block body 1 is connected to the crankshaft body 2 through the connecting bottom 101.

[0040] Furthermore, the extension is located at one end connecting to the bottom 101. This "one end" can be understood as the circular end of an approximately cylindrical structure. Figure 1In the embodiment, the extension part is arranged at the top end of the connecting bottom 101. The extension part comprises a plurality of extension blocks, in the embodiment, three extension blocks are shown, so the extension blocks can comprise a first extension block 102 and a second extension block 103, but are not limited thereto, the number of the extension blocks can be reasonably selected according to actual needs, for example, as the displacement of the scroll compressor increases and the weight of the orbiting scroll plate increases, the number of the extension blocks can be increased accordingly. Whether it is the two extension blocks given in the embodiment or more extension blocks arranged based on actual conditions, the extension blocks are arranged in sequence along the axial direction of the connecting bottom 101, and the extension blocks are arranged in sequence along the axial direction of the connecting bottom 101. Figure 1 In the embodiment, the first extension block 102 is arranged at the top of the connecting bottom 101, and the second extension block 103 is arranged at the top of the first extension block 102. The outer diameter dimensions of the plurality of extension blocks arranged in sequence along the axial direction of the connecting bottom 101 gradually increase. The extension blocks with different outer diameter dimensions and the connecting bottom 101 can make the mass distribution of the balance block body 1 no longer single, can make the mass distribution of the balance block body 1 closer to the orbiting scroll plate while reducing the mass of the balance block body 1, and further reduce the mass required for dynamic balancing of the balance block body 1, reduce the rotating mass, reduce the overall power consumption, improve the energy efficiency of the scroll compressor, and reduce the vibration and noise of the scroll compressor.

[0041] The multi-stage balance block can improve the balance block body 1 in structure by the cooperation of the connecting bottom 101 and the extension part, and further improve the dynamic balancing performance of the scroll compressor. The plurality of extension blocks with different sizes arranged along the axial direction of the connecting bottom 101 can make the mass distribution of the balance block body 1 no longer single, and further make the mass distribution of the balance block body 1 closer to the orbiting scroll plate while reducing the mass of the balance block body 1, reduce the mass required for dynamic balancing of the balance block body 1, reduce the rotating mass, thereby reducing the overall power consumption of the scroll compressor, improving the energy efficiency of the scroll compressor, and effectively avoiding the vibration and noise of the scroll compressor caused by the increase of the mass of the balance block in the original structure.

[0042] Preferably, as Figures 1 to 3As shown in the embodiment, the connecting bottom 101 can include a support block 105 and a connecting block 106 connected to each other, and the support block 105 and the connecting block 106 can each be formed into a semicircular structure, wherein the connecting block 106 forms a semicircular structure with a smaller diameter than the semicircular structure formed by the support block 105. The support block 105 can be understood as a support bottom of the first extension block 102 and the second extension block 103, and the outer diameter of the support block 105 is smaller than the outer diameter of the first extension block 102 and the second extension block 103. A first matching hole 104 is formed at the connection between the support block 105 and the connecting block 106. The first matching hole 104 can be formed into a circular through hole, which is matched with the crankshaft body 2 described below. The first matching hole 104 is only arranged on the connecting bottom 101, and is not arranged on the plurality of extension blocks, so that the mass of the balance block body 1 can be effectively reduced while meeting the connection between the balance block body 1 and the crankshaft body 2.

[0043] Preferably, as Figures 1 to 3 As shown in the embodiment, each of the plurality of extension blocks is formed into a semicircular structure. The semicircular structure can meet the required rotary force for dynamic balance, and can effectively reduce the mass of the balance block body 1.

[0044] As Figures 1 to 10 As shown, according to the second aspect of the utility model, a balance block assembly is provided, which comprises the multi-stage balance block, the crankshaft and the balance block cover as described above. The balance block assembly can be installed on a scroll compressor. The balance block body 1 can be sleeved on the crankshaft body 2, and the balance block cover body 3 can be sleeved on the balance block body 1.

[0045] Preferably, as Figures 4 to 7 As shown in the embodiment, the balance block cover body 3 is provided with a containing groove 303, and the balance block body 1 can be contained in the containing groove 303. A second matching hole 304 connected with the crankshaft body 2 is formed in the groove bottom of the containing groove 303. The second matching hole 304 can be formed into a circular through hole, which can be used for the penetration of the crankshaft body 2.

[0046] Preferably, as Figures 4 to 7 As shown in the embodiment, the containing groove 303 can include a plurality of stepped portions, which are sequentially arranged along the axis direction of the groove bottom of the containing groove 303, each of the plurality of stepped portions protrudes outward along the radial direction of the containing groove 303, and the plurality of stepped portions can be arranged in one-to-one correspondence with the plurality of extension blocks. In the embodiment, the plurality of extension blocks include the first extension block 102 and the second extension block 103, and the plurality of stepped portions include the first stepped portion 301 and the second stepped portion 302. Accordingly, the shape and size of the first extension block 102 can correspond to the shape and size of the first stepped portion 301, and the shape and size of the second extension block 103 can correspond to the shape and size of the second stepped portion 302. In actual assembly, the plurality of extension blocks can be in interference fit with the plurality of stepped portions.

[0047] Preferably, such as Figures 4 to 7 As shown, in this embodiment, multiple stepped portions are formed as annular structures. The annular structure can accommodate the extension block and facilitates assembly.

[0048] Preferably, such as Figure 4 and Figure 6 As shown, a plurality of guide holes 305 are also provided on the periphery of the second mating hole 304. Since the second mating hole 304 can be formed as a circular through hole, the periphery of the second mating hole 304 is also circular. The plurality of guide holes 305 can be evenly spaced from each other at the bottom of the receiving groove 303. The plurality of guide holes 305 can increase the flow area, reduce exhaust resistance, improve the efficiency and reliability of the scroll compressor, and also reduce the noise generated by the scroll compressor during operation.

[0049] Preferably, such as Figures 8 to 10 As shown, the outer wall of the crankshaft body 2 is provided with a shoulder portion 201 that mates with the second mating hole 304. The shoulder portion 201 protrudes outward from the outer wall of the crankshaft body 2 along the radial direction of the crankshaft body 2. In actual assembly, the diameter of the shoulder portion 201 is slightly larger than the diameter of the first mating hole 104, while the diameter of the second mating hole 304 is larger than the diameter of the first mating hole 104. Since the balance block body 1 is engaged with the shoulder portion 201 during assembly, and the balance block cover body 3 is fitted onto the outside of the balance block body 1, it is sufficient that the diameter of the shoulder portion 201 is slightly larger than the diameter of the first mating hole 104.

[0050] Preferably, the balance block body 1 can be fixed to the balance block cover body 3 by resistance welding. Resistance welding provides high connection strength, is simple, efficient, and fast, and compared to traditional threaded connections, it offers higher strength and prevents the balance block cover body 3 from rotating circumferentially. The welding position is... Figure 4 Resistance welding protrusion 306 in the middle.

[0051] The assembly process of the balance weight assembly is as follows: the first mating hole 104 of the balance weight body 1 is interference-fitted with the crankshaft body 2. The balance weight body 1 can be cold-pressed into the crankshaft body 2 and limited by the shoulder 201. Then the balance weight cover body 3 is installed. The balance weight cover body 3 is cold-pressed onto the balance weight body 1. The balance weight body 1 and the balance weight cover body 3 are interference-fitted in the circumferential direction. The balance weight body 1 and the balance weight cover body 3 are fixed by resistance welding using a resistance welding machine.

[0052] The balance block assembly can improve the dynamic balance performance of the scroll compressor through the cooperation of the balance block body 1, the crankshaft body 2 and the balance block cover body 3, and can improve the balance block body 1 and the balance block cover body 3 in structure through the cooperation of the balance block body 1 with multiple extension blocks and the balance block cover body 3 with multiple stepped portions, so that the mass distribution of the balance block assembly is no longer single, and the mass distribution of the balance block assembly is closer to the orbiting scroll while reducing the mass of the balance block assembly, the mass required for dynamic balance is reduced, the rotating mass is reduced, the overall power consumption of the scroll compressor is reduced, the energy efficiency of the scroll compressor is improved, and the vibration and noise of the scroll compressor caused by the increase of the balance block mass in the original structure can be effectively avoided. In addition, the multiple flow guide holes 305 arranged on the groove bottom of the accommodating groove 303 can increase the flow area, reduce the exhaust resistance, improve the efficiency and reliability of the scroll compressor, and further reduce the noise generated during the operation of the scroll compressor.

[0053] In addition, according to the third aspect of the present application, a scroll compressor is provided, which comprises the balance block assembly as described above.

[0054] As shown in Figure 11 and Figure 12 In the embodiment, the upper part of the balance block assembly is further provided with a static scroll 4 and an upper bracket 5, wherein the lower end of the upper bracket 5 can be matched with the extension block formed in a semicircular structure to realize fixed assembly. When the scroll compressor is in operation, the balance block assembly and the orbiting scroll are respectively arranged on both sides of the crankshaft body 2, and the balance block assembly can generate centrifugal force.

[0055] Finally, it should be noted that the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit the same, and the protection scope of the present application is not limited thereto. Although the present 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 make modifications or easily think of changes to the technical solutions recorded in the foregoing embodiments within the technical scope disclosed by the present application, or make equivalent replacements to some technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-order balancing block, characterized in that, The multi-stage balance block includes a connecting bottom and an extension. The extension is disposed at one end of the connecting bottom and includes multiple extension blocks. The multiple extension blocks are arranged sequentially along the axial direction of the connecting bottom, and the outer diameter of the multiple extension blocks arranged sequentially along the axial direction of the connecting bottom gradually increases.

2. The multi-stage balancing block according to claim 1, characterized in that, The bottom of the connection includes a support block and a connecting block connected to each other. The support block is connected to the extension, and a first mating hole is provided at the connection between the support block and the connecting block.

3. The multi-stage balancing block according to claim 2, characterized in that, The multiple extension blocks are all formed into a semi-circular structure.

4. A balance block assembly, characterized in that, The balance block assembly includes a multi-stage balance block, a crankshaft, and a balance block cover as described in any one of claims 1 to 3, wherein the multi-stage balance block is fitted onto the crankshaft, and the balance block cover is fitted onto the multi-stage balance block.

5. The balance block assembly according to claim 4, characterized in that, The balance block cover is provided with a receiving groove, and the multi-stage balance block is received in the receiving groove; The bottom of the receiving groove is provided with a second mating hole for connection with the crankshaft.

6. The balance block assembly according to claim 5, characterized in that, The receiving groove includes multiple stepped portions, which are arranged sequentially along the axial direction of the bottom of the receiving groove, and each stepped portion protrudes outward along the radial direction of the receiving groove. The plurality of stepped portions are provided in a one-to-one correspondence with the plurality of extended blocks.

7. The balance block assembly according to claim 6, characterized in that, All of the aforementioned stepped portions are formed into a ring structure.

8. The balance block assembly according to claim 5, characterized in that, Multiple guide holes are also provided on the periphery of the second mating hole.

9. The balance block assembly according to claim 5, characterized in that, The outer wall of the crankshaft is provided with a shoulder portion that mates with the second mating hole, and the shoulder portion protrudes outward from the outer wall of the crankshaft along the radial direction of the crankshaft.

10. A scroll compressor, characterized in that, The scroll compressor includes the balance block assembly as described in any one of claims 4 to 9.

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