Balance block assembly and scroll compressor

Abstract

The utility model relates to the technical field of compressors, in particular to a balance block assembly and a scroll compressor. The balance block assembly comprises a balance block and a whole circle block, the balance block comprises a balance block body, the balance block body and the whole circle block are in a sector ring shape and can be spliced into an annular structural part, the annular structural part formed through splicing can be arranged on an eccentric shaft of the scroll compressor in a sleeving mode, and meanwhile the balance block body and the whole circle block have different weights. Therefore, an annular structural part formed by splicing the balance block main body and the whole circle block can eliminate the rotation inertia force and inertia moment generated when the eccentric shaft and the movable scroll plate rotate; meanwhile, a traditional balance block cover is replaced with the whole circle block, stirring on airflow in the scroll compressor and influence on the oil discharge rate of the compressor when the balance block rotates are reduced, and compared with the traditional balance block cover, the whole circle block is more stable in structure, higher in reliability and not prone to deformation during high-speed rotation.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a balancing block assembly and a scroll compressor. Background Art

[0002] Due to the presence of a moving scroll disk and an eccentric shaft, a scroll compressor has unbalanced rotational inertia force and inertia moment during movement. Therefore, a balancing block is usually provided on the eccentric shaft of the scroll compressor to eliminate the unbalanced inertia force and inertia moment and ensure the overall dynamic balance of the compressor. The balancing block is also usually equipped with a balancing block cover to reduce the agitation of the airflow near the exhaust port inside the compressor when the balancing block rotates with the eccentric shaft, as well as the impact on the oil discharge rate of the compressor.

[0003] As the requirements for the speed of the compressor unit continue to increase, the weight of the movable scroll disk continues to increase, and the weight and height of the balance block also continue to increase, which makes the height of the balance block cover also increase. However, the thickness of the plate of the balance block cover is usually thin, and the increase in its height also increases the risk of deformation of the balance block cover; if the thickness of the balance block cover is simply increased, not only the weight of the ineffective part will be increased, but the deformation of the balance block cover will also reduce the insulation distance between it and the terminal inside the compressor. Utility Model Content

[0004] The utility model aims to provide a balancing block assembly and a scroll compressor, which can reduce the influence of the balancing block rotation on the airflow and oil discharge rate in the compressor when the balancing block cover is eliminated.

[0005] The utility model provides a balancing block assembly, comprising a balancing block and a full-circle block;

[0006] The balancing weight comprises a balancing weight body, and the balancing weight body is in a sector ring shape;

[0007] The full circular block is also in a sector ring shape and can be engaged with the balancing block body to form an annular structure and sleeved on the eccentric shaft of the scroll compressor. The full circular block and the balancing block body have different weights.

[0008] Furthermore, a mounting hole is formed between the annular structure formed by the balancing block body and the whole circular block, and the mounting hole is adapted to the eccentric shaft, so that the annular structure formed by the balancing block body and the whole circular block is mounted on the eccentric shaft in an interference fit manner.

[0009] Furthermore, a mounting portion is provided on the inner side of the balancing weight body in the radial direction, and the mounting portion is provided with a center hole, which is adapted to the eccentric shaft, so that the balancing weight body is fitted onto the eccentric shaft through the mounting portion in an interference fit manner.

[0010] Furthermore, the balancing weight body is connected to the full circular weight by welding;

[0011] Alternatively, the balancing weight body includes a first side portion and a second side portion, and the full circular block includes a third side portion and a fourth side portion. When the balancing weight body and the full circular block are engaged with each other, the first side portion is opposite to the third side portion, the second side portion is opposite to the fourth side portion, and the first side portion and the third side portion, as well as the second side portion and the fourth side portion, are connected by fixing pins.

[0012] Furthermore, the axial height of the mounting portion is less than or equal to the axial height of the balancing weight.

[0013] Furthermore, there are multiple balancing blocks, and the multiple balancing blocks are spaced apart along the axial direction of the eccentric shaft;

[0014] There are also multiple full-circle blocks, and the multiple full-circle blocks correspond one-to-one to the multiple balancing blocks.

[0015] Furthermore, the eccentric shaft is provided with a shaft shoulder portion for limiting the installation positions of the balancing block and the full-circular block on the eccentric shaft.

[0016] Furthermore, an annular groove is provided on the eccentric shaft, and a retaining spring is provided in the annular groove, so that the mounting positions of the balancing block and the full-circular block on the eccentric shaft are limited by the retaining spring.

[0017] Furthermore, the whole circular block is made of at least one material selected from polytetrafluoroethylene, polyetheretherketone, polyphenylene sulfide and polyamide through sintering or injection molding.

[0018] The utility model also provides a scroll compressor, comprising any one of the balancing block components described above.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The balancing block assembly provided by the present invention includes a balancing block and a full-circle block, wherein the balancing block includes a balancing block body, which is in a fan-shaped ring shape; the full-circle block is also in a fan-shaped ring shape, and the full-circle block is adapted to the balancing block body so that the full-circle block can be assembled with the balancing block to form an annular structure. The annular structure formed by the balancing block body and the full-circle block can be sleeved on the eccentric shaft of the scroll compressor, and the balancing block body and the full-circle block have different weights, so that the annular structure formed by the balancing block body and the full-circle block can eliminate the rotational inertia force and inertia moment generated when the eccentric shaft and the orbiting scroll disk rotate; at the same time, the full-circle block replaces the traditional balancing block cover, thereby reducing the agitation of the air flow inside the scroll compressor when the balancing block rotates, and reducing the impact on the oil discharge rate of the compressor; at the same time, the full-circle block is more stable and reliable than the traditional balancing block cover structure, and is not easily deformed during high-speed rotation.

[0021] The utility model also provides a scroll compressor comprising the balancing block assembly, so that the scroll compressor also has the beneficial effects of the balancing block assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the assembly of a balancing weight assembly in a scroll compressor provided by an embodiment of the present utility model;

[0024] Figure 2 An exploded schematic diagram of a balancing hole assembly including a balancing weight provided in an embodiment of the present utility model;

[0025] Figure 3 This is another structural schematic diagram of the balancing weight provided in an embodiment of the present utility model.

[0026] Reference numerals:

[0027] 1-Balance block assembly, 11-Balance block body, 12-Full circle block, 13-Mounting part, 2-Eccentric shaft, 3-Orbiting scroll. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0030] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] Refer to the following Figures 1 to 3 A balancing weight assembly and a scroll compressor according to some embodiments of the present application are described.

[0034] The present application provides a balancing block assembly 1 for installation on the eccentric shaft 2 of a scroll compressor to eliminate the rotational inertia force and inertia moment when the eccentric shaft 2 and the movable scroll plate 3 connected to the eccentric shaft 2 rotate, thereby ensuring the overall dynamic balance of the compressor.

[0035] like Figure 1 and Figure 2 As shown, the balancing weight assembly 1 includes a balancing weight and a full-circular weight 12, wherein the balancing weight includes a balancing weight body 11, which is in a fan-shaped ring shape; the full-circular weight 12 is also in a fan-shaped ring shape, and the full-circular weight 12 is adapted to the balancing weight body 11, so that the full-circular weight 12 can be assembled with the balancing weight to form an annular structural component.

[0036] The annular structure formed by the balancing block main body 11 and the whole circular block 12 can be mounted on the eccentric shaft 2 of the scroll compressor, and the balancing block main body 11 and the whole circular block 12 have different weights, so that the annular structure formed by the balancing block main body 11 and the whole circular block 12 can eliminate the rotational inertia force and inertia moment generated when the eccentric shaft 2 and the movable scroll plate 3 rotate; at the same time, the whole circular block 12 also replaces the traditional balancing block cover, thereby reducing the agitation of the air flow inside the scroll compressor when the balancing block rotates, and reducing the impact on the oil discharge rate of the compressor; at the same time, the whole circular block 12 is more stable and reliable than the traditional balancing block cover structure, and is not easy to deform during high-speed rotation.

[0037] In one embodiment of the present application, preferably, a mounting hole is formed between the annular structure formed by the balancing block main body 11 and the whole circular block 12, and the mounting hole is adapted to the eccentric shaft 2, so that the annular structure formed by the balancing block main body 11 and the whole circular block 12 can be installed on the eccentric shaft 2 in an interference fit manner through the mounting hole, so that it can rotate synchronously with the eccentric shaft 2 and eliminate the rotational inertia force and inertia moment generated when the movable scroll 3 rotates.

[0038] In another embodiment of the present application, preferably, a mounting portion 13 is provided on the inner side of the balancing weight body 11 in the radial direction, and the mounting portion 13 is provided with a center hole. For example, the mounting portion 13 is an annular body with a center hole. The axis of the center hole of the mounting portion 13 is collinear with the axis of the sector-shaped balancing weight body 11, and the center hole is adapted to the eccentric shaft 2, so that the balancing weight body 11 can be inserted into the eccentric shaft 2 through the center hole of the mounting portion 13 in an interference fit manner, and then the full-circular mass 12 is connected to the balancing weight body 11, thereby achieving fixed installation of the balancing weight and the full-circular mass 12 on the eccentric shaft 2.

[0039] Regarding the connection between the full circular block 12 and the balancing block body 11 , in one embodiment of the present application, preferably, the full circular block 12 and the balancing block body 11 are connected by welding.

[0040] Alternatively, the balancing weight body 11 and the full-circle weight 12 are fixedly connected via a fixing pin.

[0041] Specifically, the balancing block body 11 includes a first side portion and a second side portion, and the whole circular block 12 includes a third side portion and a fourth side portion. When the balancing block body 11 and the whole circular block 12 are assembled together to form an annular structure, the first side portion of the balancing block body 11 is arranged to face the third side portion of the whole circular block 12, and the second side portion of the balancing block body 11 is arranged to face the fourth side portion of the whole circular block 12.

[0042] Sockets for inserting fixing pins are provided at positions opposite to each other of the first side portion and the third side portion, so that the first side portion and the third side portion can be fastened together by the fixing pins; similarly, sockets for inserting fixing pins are provided at positions opposite to the second side portion and the fourth side portion, so that the second side portion and the fourth side portion can also be fastened together by the fixing pins, thereby stably installing the full circular block 12 and the balancing block body 11 together.

[0043] In this embodiment, preferably, a plurality of fixing pins are provided at intervals between the first side portion and the third side portion, and between the second side portion and the fourth side portion, so as to improve the stability of the connection between the full circular block 12 and the balancing weight body 11 .

[0044] In one embodiment of the present application, preferably, a shoulder portion is provided on the eccentric shaft 2 to limit the axial installation position of the balancing weight and the full-circular weight 12 on the eccentric shaft 2 through the circumferential shoulder portion.

[0045] Alternatively, an annular groove is provided on the outer side wall of the eccentric shaft 2 for installing a retaining spring, and the retaining spring is used to limit the axial installation position of the balancing weight and the full-circular weight 12 on the eccentric shaft 2.

[0046] In this facility, preferably, for the balancing weight including the mounting portion 13, the balancing weight body 11 and the mounting portion 13 have the same axial height, or as shown in FIG. Figure 3 As shown, the axial height of the mounting portion 13 is less than the axial height of the balancing weight body 11. The axial height is the height of a component along its own axial direction.

[0047] like Figure 2 As shown, when the balancing weight body 11 and the mounting portion 13 have the same axial height, both ends of the mounting portion 13 in the axial direction are flush with both ends of the balancing weight body 11 .

[0048] like Figure 3 As shown, when the axial height of the mounting portion 13 is less than the axial height of the balancing weight body 11, one axial end of the mounting portion 13 is flush with one axial end of the balancing weight body 11, and the other axial end of the mounting portion 13 is lower than the other axial end of the balancing weight body 11. Alternatively, both ends may not be flush.

[0049] In this embodiment, preferably, the balancing hole body and the mounting portion 13 are integrally formed.

[0050] In one embodiment of the present application, preferably, there are multiple balancing blocks, and the multiple balancing blocks are spaced apart along the axial direction of the eccentric shaft 2 , and each balancing block is correspondingly configured with a full-circular block 12 .

[0051] In one embodiment of the present application, preferably, the whole circular block 12 is made of a lightweight polymer material so that the whole circular block 12 has a lighter weight, has a different weight than the balance block body 11, and reduces the weight of the ineffective part.

[0052] Preferably, the full-circle block 12 is made of at least one material selected from polytetrafluoroethylene, polyetheretherketone, polyphenylene sulfide and polyamide by sintering or injection molding.

[0053] The present application also provides a scroll compressor, comprising the balancing block assembly 1 of any one of the above embodiments.

[0054] In this embodiment, the scroll compressor includes the balancing mass assembly 1 , and thus the scroll compressor has all the beneficial effects of the balancing mass assembly 1 , which will not be described in detail here.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A balancing weight assembly, characterized in that: Including balancing weights and full circle weights; The balancing weight comprises a balancing weight body, and the balancing weight body is in a sector ring shape; The full circular block is also in a sector ring shape and can be engaged with the balancing block body to form an annular structure and sleeved on the eccentric shaft of the scroll compressor. The full circular block and the balancing block body have different weights.

2. The balancing weight assembly according to claim 1, characterized in that: A mounting hole is formed between the annular structure formed by the balancing block body and the full circular block, and the mounting hole is adapted to the eccentric shaft so that the annular structure formed by the balancing block body and the full circular block is sleeved on the eccentric shaft in an interference fit manner.

3. The balancing weight assembly according to claim 1, characterized in that: A mounting portion is provided on the radial inner side of the balancing weight body. The mounting portion is provided with a center hole. The center hole is adapted to the eccentric shaft so that the balancing weight body is fitted onto the eccentric shaft through the mounting portion in an interference fit manner.

4. The balancing weight assembly according to claim 1, characterized in that: The balancing block body is connected to the full-circle block by welding; or, The balancing weight body includes a first side portion and a second side portion, and the full circular block includes a third side portion and a fourth side portion. When the balancing weight body and the full circular block are buckled with each other, the first side portion is opposite to the third side portion, the second side portion is opposite to the fourth side portion, and the first side portion and the third side portion, as well as the second side portion and the fourth side portion, are connected by fixing pins.

5. The balancing weight assembly according to claim 3, characterized in that: The axial height of the mounting portion is less than or equal to the axial height of the balancing weight.

6. The balancing weight assembly according to claim 1, characterized in that: There are multiple balancing blocks, and the multiple balancing blocks are spaced apart along the axial direction of the eccentric shaft; There are also multiple full-circle blocks, and the multiple full-circle blocks correspond one-to-one to the multiple balancing blocks.

7. The balancing weight assembly according to claim 1, characterized in that: The eccentric shaft is provided with a shaft shoulder portion for limiting the installation positions of the balancing block and the full-circular block on the eccentric shaft.

8. The balancing weight assembly according to claim 1, wherein: An annular groove is provided on the eccentric shaft, and a retaining spring is provided in the annular groove so as to limit the installation positions of the balancing block and the full-circular block on the eccentric shaft through the retaining spring.

9. A scroll compressor, characterized in that: A balancing weight assembly comprising the balancing weight assembly according to any one of claims 1 to 8.

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