Scroll compressor balancing mechanism and scroll compressor assembly
By installing asymmetrical fan-shaped balance blocks on both ends of the rotor core of the scroll compressor, combined with the design of the eccentric pin and the counterweight balance block, the problem that the existing technology cannot effectively balance the imbalance force in the horizontal plane is solved, and a full-dimensional moment balance with simple structure and low cost is achieved.
Patent Information
- Application Number
- CN202420749273.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The existing scroll compression motor dynamic balance design structure cannot effectively balance the imbalance force and imbalance torque in the vertical horizontal plane of the vertical symmetrical plane, resulting in complex design, difficult calculation, and high cost.
By installing the first sector balance block and the second sector balance block at both ends of the rotor core and designing them into an asymmetric structure, combining the design of the eccentric pin and the counterweight balance block, the imbalance force and imbalance moment of the vertical and horizontal symmetric surfaces are achieved.
The design structure is simplified, the manufacturing difficulty and cost are reduced, and all unbalanced forces and unbalanced moments generated during the operation of the scroll compressor are effectively balanced.
Smart Images
Figure CN222731735U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of compressors, and in particular to a scroll compressor balancing mechanism and a scroll compressor assembly. Background Art
[0002] The dynamic balance design structure of the scroll compressor includes parts such as a movable scroll assembly, a counterweight balance block, an upper rotor balance block, a lower rotor balance block, a rotor core, a motor shaft assembly, a main bearing, and a secondary bearing. During the operation of the scroll compressor, the movable scroll assembly, driven by the motor shaft assembly, eccentrically moves around the center of the motor shaft. During this period, the movable scroll assembly will generate a large centrifugal force, which will cause the entire rotating motion component to be subjected to a large unbalanced force and unbalanced torque. In the prior art, in order to balance the unbalanced force and unbalanced torque generated by the eccentric movement of the movable scroll assembly, an adaptive counterweight balance block, an upper rotor balance block, and a lower rotor balance block are set at the corresponding position of the compressor.
[0003] The inventors have found that the existing scroll compressor dynamic balance design structure has at least the following disadvantages:
[0004] The combination design of the rotor upper balancing block, rotor lower balancing block and counterweight balancing block in the prior art can only balance the unbalanced force and unbalanced moment on the vertical symmetry plane, but cannot balance the unbalanced force and unbalanced moment in the horizontal plane perpendicular to the vertical symmetry plane. In order to achieve the unbalanced force and unbalanced moment in the horizontal plane, it is necessary to adjust the weight and shape of a large number of parts such as the counterweight balancing block and the motor shaft assembly. This method has a complex design process, involves many parts, is difficult to calculate, and requires repeated iterative calculations, which is not convenient for the force balance and torque balance design of the entire rotary motion component. Utility Model Content
[0005] The purpose of the utility model is to provide a scroll compressor balancing mechanism and a scroll compressor assembly, which can simultaneously balance the unbalanced forces and unbalanced moments on the vertical symmetry plane and balance the unbalanced forces and unbalanced moments in the horizontal plane perpendicular to the vertical symmetry plane, and have a simple structure, convenient processing and manufacturing, and low cost.
[0006] The embodiment of the utility model is achieved as follows:
[0007] In a first aspect, the utility model provides a scroll compressor balancing mechanism, comprising:
[0008] A motor shaft, a rotor core, a first sector-shaped balancing block, a second sector-shaped balancing block, an eccentric pin, a counterweight balancing block and a movable scroll unit; the rotor core is mounted outside the motor shaft, the first sector-shaped balancing block and the second sector-shaped balancing block are respectively mounted at two ends of the rotor core, and the counterweight balancing block is fixed to the motor shaft through the eccentric pin; the movable scroll unit is rotatably matched with the counterweight balancing block;
[0009] The first angular bisector of the first sector-shaped balancing block and the second angular bisector of the second sector-shaped balancing block are parallel and perpendicular to the axis of the motor shaft, and the first angular bisector, the second angular bisector and the axis cooperate to determine a first symmetry plane; the first sector-shaped balancing block is an asymmetric structure relative to the first symmetry plane, and the second sector-shaped balancing block is an asymmetric structure relative to the first symmetry plane.
[0010] In an optional embodiment, a first notch is provided on the first sector-shaped balancing block, and the first notch is asymmetrically arranged relative to the first symmetry plane.
[0011] In an optional embodiment, the first notch is provided on the outer peripheral surface of the first sector-shaped balancing block.
[0012] In an optional embodiment, a first counterweight portion is disposed on the first sector-shaped balancing block, and the first counterweight portion is asymmetrically disposed relative to the first symmetry plane.
[0013] In an optional embodiment, a second notch is provided on the second sector-shaped balancing block, and the second notch is asymmetrically arranged relative to the first symmetry plane.
[0014] In an optional embodiment, the second notch is provided on the outer peripheral surface of the second sector-shaped balancing block.
[0015] In an optional embodiment, a second counterweight portion is disposed on the second sector-shaped balancing block, and the second counterweight portion is asymmetrically disposed relative to the first symmetry plane.
[0016] In an optional embodiment, the first sector-shaped balancing block or the second sector-shaped balancing block is fixedly connected to the rotor core via a fastener.
[0017] In an optional implementation, the first sector-shaped balancing weight and the second sector-shaped balancing weight are respectively located on two sides of the motor shaft.
[0018] In a second aspect, the utility model provides a scroll compressor assembly, the scroll compressor assembly comprising:
[0019] A scroll compressor balancing mechanism according to any one of the aforementioned embodiments.
[0020] The beneficial effects of the embodiments of the utility model are:
[0021] In summary, the scroll compressor balancing mechanism provided in this embodiment, during the operation of the scroll compressor, the movable scroll unit, driven by the motor shaft, eccentrically moves in a circular motion around the axis of the motor shaft, during which the movable scroll unit will generate a large centrifugal force, which will cause the entire rotary motion component to bear a large unbalanced force and unbalanced torque. In order to improve this situation, by arranging the first fan-shaped balancing block and the second fan-shaped balancing block at both ends of the rotor core, the unbalanced force and unbalanced torque in the vertical symmetry plane, that is, the first symmetry plane, can be balanced. At the same time, by setting the first fan-shaped balancing block and the second fan-shaped balancing block to an asymmetric structure, the unbalanced force and unbalanced torque in the horizontal symmetry plane perpendicular to the vertical symmetry plane can be balanced. In other words, in order to balance the unbalanced force and unbalanced torque generated during the operation of the scroll compressor, the structure of the first fan-shaped balancing block and the second fan-shaped balancing block can be adjusted and designed, which can reduce or even eliminate the need to improve the structure of other components such as the counterweight balancing block and the motor shaft assembly, reduce the difficulty of processing and manufacturing, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 A schematic diagram of a scroll compressor balancing mechanism according to an embodiment of the utility model;
[0024] Figure 2 It is a cross-sectional schematic diagram of a scroll compressor balancing mechanism according to an embodiment of the utility model;
[0025] Figure 3 for Figure 2 Schematic diagram of the middle AA direction;
[0026] Figure 4 for Figure 2 Schematic diagram of the BB direction.
[0027] icon:
[0028] 001-first symmetry plane; 002-second symmetry plane; 003-front end bearing; 004-rear end bearing; 005-mounting bearing; 100-motor shaft; 200-rotor core; 300-first sector-shaped balancing block; 310-first notch; 320-first fixing hole; 400-second sector-shaped balancing block; 410-second notch; 420-second fixing hole; 500-eccentric pin; 600-counterweight balancing block; 700-moving scroll unit. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0032] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0033] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only 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.
[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] In the prior art, when the scroll compressor is in operation, due to the existence of centrifugal force, the entire rotary motion component is subjected to large unbalanced force and unbalanced torque. In order to balance the unbalanced force and unbalanced torque, a symmetrically arranged balancing block is generally provided on the rotor core 200. However, the inventor has found through research that the structural design of the existing symmetrically arranged balancing blocks can only improve the unbalanced force and unbalanced torque in the vertical symmetry plane, but cannot improve the unbalanced force and unbalanced torque in the horizontal symmetry plane perpendicular to the vertical symmetry plane. In order to improve the unbalanced force and unbalanced torque in the horizontal symmetry plane, it is necessary to improve the design of other components except the balancing block, which has a high manufacturing cost.
[0036] In view of this, the designer provides a scroll compressor balancing mechanism, which can improve the unbalanced force and unbalanced torque in the vertical symmetry plane and the horizontal symmetry plane at the same time by improving the structure of the balancing block installed on the rotor core 200, with low manufacturing difficulty and low manufacturing cost.
[0037] Please combine Figure 1 and Figure 2 In this embodiment, the scroll compressor balancing mechanism includes a motor shaft 100, a rotor core 200, a first sector balancing block 300, a second sector balancing block 400, an eccentric pin 500, a counterweight balancing block 600 and a movable scroll unit 700. The rotor core 200 is installed outside the motor shaft 100, the first sector balancing block 300 and the second sector balancing block 400 are respectively installed at both ends of the rotor core 200, and the counterweight balancing block 600 is fixed to the motor shaft 100 through the eccentric pin 500. The movable scroll unit 700 is rotatably matched with the counterweight balancing block 600. The first angular bisector of the first sector balancing block 300 and the second angular bisector of the second sector balancing block 400 are parallel and perpendicular to the axis of the motor shaft 100, and the first angular bisector, the second angular bisector and the axis cooperate to determine the first symmetry plane 001. The first sector-shaped balancing block 300 is an asymmetric structure relative to the first symmetric plane 001 , and the second sector-shaped balancing block 400 is an asymmetric structure relative to the first symmetric plane 001 .
[0038] As described above, the working principle of the scroll compressor balancing mechanism provided in this embodiment is as follows:
[0039] The motor shaft 100 rotates under the drive of the rotor core 200, thereby driving the eccentric pin 500 to rotate, and the counterweight balancing block 600 is driven to move through the eccentric pin 500, and finally the movable scroll unit 700 is driven to move. During this movement process, the movable scroll unit 700, driven by the motor shaft 100, eccentrically moves around the axis of the motor shaft 100, during which the movable scroll unit 700, the counterweight balancing block 600, the eccentric pin 500 and other components will generate a large centrifugal force, which will cause the entire rotary motion component to bear a large unbalanced force and unbalanced torque. In order to improve this situation, by arranging the first sector balancing block 300 and the second sector balancing block 400 at both ends of the rotor core 200, the unbalanced force and unbalanced moment in the vertical symmetry plane, that is, the first symmetry plane 001, can be balanced. At the same time, by setting the first sector balancing block 300 and the second sector balancing block 400 as an asymmetric structure, the unbalanced force and unbalanced moment in the second symmetry plane 002 perpendicular to the first symmetry plane 001, that is, the horizontal symmetry plane, can be balanced. In other words, in order to balance the unbalanced force and unbalanced moment generated during the operation of the scroll compressor, the structure of the first sector balancing block 300 and the second sector balancing block 400 can be adjusted and designed, which can reduce or even eliminate the need to improve the structure of other components such as the counterweight balancing block 600 and the motor shaft assembly, thereby reducing the difficulty of processing and manufacturing and reducing costs.
[0040] The details of the scroll compressor balancing mechanism of the embodiment of the present application are described below by way of examples.
[0041] Please combine Figure 1 and Figure 2 In this embodiment, the scroll compressor balancing mechanism includes a motor shaft 100, a front bearing 003, a rear bearing 004, a rotor core 200, a first sector balancing block 300, a second sector balancing block 400, an eccentric pin 500, a counterweight balancing block 600, a mounting bearing 005 and a movable scroll unit 700. The motor shaft 100 is rotatably matched with the compressor housing through the front bearing 003 and the rear bearing 004. The rotor core 200 is mounted outside the motor shaft 100, and the two rotate synchronously. The first sector balancing block 300 and the second sector balancing block 400 are respectively mounted on the two end faces of the rotor core 200 in the axial direction of the motor shaft 100, and the first sector balancing block 300 and the second sector balancing block 400 rotate with the rotor core 200. The counterweight balancing block 600 is fixed to the end of the motor shaft 100 near the rear bearing 004 through the eccentric pin 500. The movable scroll unit 700 and the counterweight balancing block 600 are rotatably matched by mounting bearings 005. The motor shaft 100 rotates under the drive of the rotor core 200, and drives the movable scroll unit 700 to perform circumferential translation through the eccentric pin 500 and the counterweight balancing block 600.
[0042] At the same time, the first angular bisector of the first sector balancing block 300 and the second angular bisector of the second sector balancing block 400 are parallel and perpendicular to the axis of the motor shaft 100. The first angular bisector, the second angular bisector and the axis cooperate to determine the first symmetry plane 001, which can also be called a vertical symmetry plane. The first sector balancing block 300 is an asymmetric structure relative to the first symmetry plane 001, and the second sector balancing block 400 is an asymmetric structure relative to the first symmetry plane 001. After assembly, the first sector balancing block 300 and the second sector balancing block 400 are located on both sides of the motor shaft 100.
[0043] Please combine Figure 3 Optionally, two first fixing holes 320 are provided on the first sector balancing block 300, each of which is a cylindrical hole, and a first fastener is inserted into each of the first fixing holes 320, and the first fastener can be a bolt or a screw, etc., and the first sector balancing block 300 can be fixed on the end surface of the rotor core 200 close to the front end bearing 003 through the first fastener. The first sector balancing block 300 can be disassembled and assembled by screwing the first fastener, and the operation is convenient.
[0044] At the same time, a first notch 310 is provided on the outer circumferential surface of the first sector-shaped balancing block 300. The first notch 310 may be an arc-shaped notch. The radius of the first notch 310 and the specific position on the first sector-shaped balancing block 300 are designed according to requirements.
[0045] Please combine Figure 4 Optionally, two second fixing holes 420 are provided on the second sector balancing block 400, each of which is a cylindrical hole, and a second fastener is inserted into each second fixing hole 420, and the second fastener can be a bolt or a screw, etc., and the second sector balancing block 400 can be fixed on the end face of the rotor core 200 close to the rear end bearing 004 through the second fastener. The second sector balancing block 400 can be disassembled and assembled by screwing the second fastener, and the operation is convenient.
[0046] Meanwhile, a second notch 410 is provided on the outer circumferential surface of the second sector-shaped balancing block 400 . The second notch 410 may be an arc-shaped notch. The radius of the second notch 410 and the specific position on the second sector-shaped balancing block 400 are designed according to requirements.
[0047] In the present embodiment, it should be noted that, in order to balance the unbalanced forces and unbalanced moments in the first symmetry plane 001 and the second symmetry plane 002, the first sector balancing block 300 and the second sector balancing block 400 are designed to be left-right asymmetric structures by respectively setting a notch structure in pairs at asymmetric positions of the first sector balancing block 300 and the second sector balancing block 400, that is, the first sector balancing block 300 and the second sector balancing block 400 are designed to be asymmetric structures relative to the first symmetry plane 001. At the same time, by designing the notch structure position and size of the first sector balancing block 300 and the second sector balancing block 400, as well as the thickness, sector angle, inner and outer circle radius and other dimensions of the first sector balancing block 300 and the second sector balancing block 400, the weight and center of mass position of the first sector balancing block 300 and the second sector balancing block 400 are adjusted to appropriate values. The force balance and moment balance of the entire rotary motion component in the horizontal and vertical planes can be achieved without changing the weight, shape and installation position of other parts, which is convenient for processing and manufacturing and has low cost.
[0048] It should be understood that in other embodiments, a first counterweight portion may be provided on the first sector-shaped balance block 300, and the first counterweight portion may be a protrusion protruding from the first sector-shaped balance block 300; or a second counterweight portion may be provided on the second sector-shaped balance block 400, and the second counterweight portion may be a protrusion protruding from the second sector-shaped balance block 400.
[0049] In addition, in other embodiments, a notch may be provided on the first sector-shaped balancing block 300, and a counterweight portion may be provided on the second sector-shaped balancing block 400. Similarly, a counterweight portion may be provided on the first sector-shaped balancing block 300, and a notch may be provided on the second sector-shaped balancing block 400, and the like, which are not listed one by one in this embodiment.
[0050] In this embodiment, the scroll compressor balancing mechanism can improve the unbalanced force and unbalanced torque existing in the first symmetry plane 001 and the second symmetry plane 002 by adjusting the structure of the first fan-shaped balancing block 300 and the second fan-shaped balancing block 400, thereby reducing the manufacturing and processing difficulty and reducing the manufacturing and processing cost.
[0051] This embodiment also provides a scroll compressor assembly, including the scroll compressor balancing mechanism of the above embodiment, which has the advantages of simple structure and low processing and manufacturing cost.
[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A scroll compressor balancing mechanism, characterized in that: include: A motor shaft (100), a rotor core (200), a first sector-shaped balancing block (300), a second sector-shaped balancing block (400), an eccentric pin (500), a counterweight balancing block (600) and a movable scroll unit (700); the rotor core (200) is mounted outside the motor shaft (100); the first sector-shaped balancing block (300) and the second sector-shaped balancing block (400) are respectively mounted at two ends of the rotor core (200); the counterweight balancing block (600) is fixed to the motor shaft (100) through the eccentric pin (500); the movable scroll unit (700) is rotatably matched with the counterweight balancing block (600); The first angular bisector of the first sector-shaped balancing block (300) and the second angular bisector of the second sector-shaped balancing block (400) are parallel and perpendicular to the axis of the motor shaft (100); the first angular bisector, the second angular bisector and the axis cooperate to define a first symmetry plane (001); the first sector-shaped balancing block (300) is an asymmetric structure relative to the first symmetry plane (001), and the second sector-shaped balancing block (400) is an asymmetric structure relative to the first symmetry plane (001).
2. The scroll compressor balancing mechanism according to claim 1, characterized in that: The first sector-shaped balancing block (300) is provided with a first notch (310), and the first notch (310) is asymmetrically arranged relative to the first symmetry plane (001).
3. The scroll compressor balancing mechanism according to claim 2, characterized in that: The first notch (310) is provided on the outer peripheral surface of the first sector-shaped balancing block (300).
4. The scroll compressor balancing mechanism according to claim 1, characterized in that: The first sector-shaped balancing block (300) is provided with a first counterweight portion, and the first counterweight portion is asymmetrically arranged relative to the first symmetry plane (001).
5. The scroll compressor balancing mechanism according to claim 1, characterized in that: The second sector-shaped balancing block (400) is provided with a second notch (410), and the second notch (410) is asymmetrically arranged relative to the first symmetry plane (001).
6. The scroll compressor balancing mechanism according to claim 5, characterized in that: The second notch (410) is provided on the outer peripheral surface of the second sector-shaped balancing block (400).
7. The scroll compressor balancing mechanism according to claim 1, characterized in that: The second sector-shaped balancing block (400) is provided with a second counterweight portion, and the second counterweight portion is asymmetrically arranged relative to the first symmetry plane (001).
8. The scroll compressor balancing mechanism according to claim 1, characterized in that: The first sector-shaped balancing block (300) or the second sector-shaped balancing block (400) is fixedly connected to the rotor core (200) via a fastener.
9. The scroll compressor balancing mechanism according to claim 1, characterized in that: The first sector-shaped balancing block (300) and the second sector-shaped balancing block (400) are respectively located on two sides of the motor shaft (100).
10. A scroll compressor assembly, characterized in that: The scroll compressor assembly comprises: The scroll compressor balancing mechanism according to any one of claims 1 to 9.