Balancing block cover for compressor and compressor

Abstract

The utility model relates to the technical field of compressor noise reduction, in particular to a balance block cover for a compressor and the compressor, the balance block cover for the compressor structurally comprises a balance block cover body which covers the outside of a main balance block of the compressor, and a crankshaft of the compressor is arranged on the balance block cover body in a penetrating mode. The main balance block can rotate relative to the balance block cover main body; and the positioning part is arranged on the side part, close to a rack of the compressor, of the balance block cover main body, and the positioning part is mounted on the rack. According to the balance block cover for the compressor and the compressor, the problems that power loss and noise are generated due to the fact that a main balance block of an existing compressor bears large resistance in the rotating process can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the compressor noise reduction technical field, especially to a balance block cover for compressor and the compressor. BACKGROUND

[0002] In the current compressor design, due to the structural limitation, the main balance block is usually installed outside the compressor frame and fixedly connected to the crankshaft. When the motor starts, the crankshaft rotates and drives the main balance block to rotate around its axis. In order to reduce the airflow disturbance generated by the main balance block during rotation, a balance block cover is usually fixedly assembled on the main balance block, so that the balance block cover rotates with the main balance block.

[0003] However, the space where the balance block cover and the main balance block are located is surrounded by the shell, the frame and the motor, and there is a large amount of high-speed flowing refrigerant gas in this space, which makes the main balance block be affected by the airflow resistance during rotation, thereby causing performance loss. Especially in the horizontal compressor, the main balance block will stir the refrigeration oil pool in the compressor cavity during rotation, which further increases the resistance borne by the main balance block during movement, significantly increases the energy loss, and generates additional noise. CONTENT

[0004] Therefore, the purpose of the present application is to provide a balance block cover for compressor and a compressor, which can solve the problem that the main balance block of the existing compressor is subjected to large resistance during rotation, resulting in power loss and noise.

[0005] According to the first aspect of the present application, a balance block cover for compressor is provided, wherein the balance block cover for compressor comprises: a balance block cover main body, which is arranged outside a main balance block of the compressor, a crankshaft of the compressor is arranged through the balance block cover main body, and the main balance block can rotate relative to the balance block cover main body; and a positioning part, which is arranged on a side of the balance block cover main body close to a frame of the compressor, and the positioning part is installed on the frame.

[0006] Preferably, a gap is formed between the inner wall of the balance block cover main body and the movement track of the main balance block.

[0007] Preferably, the width of the gap is 3-6mm.

[0008] Preferably, an opening is formed in an end of the balance block cover main body close to the frame, the positioning part is arranged in the opening, and a through hole for the crankshaft is arranged in the center of an end of the balance block cover main body away from the frame.

[0009] Preferably, the balance weight cover body comprises: a first cylindrical portion, the opening being provided at an end of the first cylindrical portion close to the frame, the first cylindrical portion being mounted to the frame through the positioning portion; and a second cylindrical portion, a diameter of the second cylindrical portion being smaller than that of the first cylindrical portion, the second cylindrical portion being connected to an end of the first cylindrical portion away from the frame, the through opening being provided at an end of the second cylindrical portion away from the first cylindrical portion.

[0010] Preferably, the first cylindrical portion comprises: a first annular plate portion, a plate surface of the first annular plate portion being parallel to an axis of the crankshaft, the positioning portion being provided at an end of the first annular plate portion close to the frame; and a first annular end plate, an outer ring of the first annular end plate being connected to an end of the first annular plate portion away from the frame, a plate surface of the first annular end plate being perpendicular to the axis of the crankshaft.

[0011] Preferably, the second cylindrical portion comprises: a second annular plate portion, a plate surface of the second annular plate portion being parallel to the axis of the crankshaft, an end of the second annular plate portion close to the frame being connected to an inner ring of the first annular end plate; and a second annular end plate, an outer ring of the second annular end plate being connected to an end of the second annular plate portion away from the frame, an inner ring of the second annular end plate being the through opening, a plate surface of the second annular end plate being perpendicular to the axis of the crankshaft.

[0012] Preferably, the positioning portion is an annular bottom plate, a plurality of positioning holes are provided on the annular bottom plate at intervals in a circumferential direction, a side of the frame facing a motor of the compressor is formed with an annular mounting surface, the annular bottom plate is parallel to the mounting surface, and the annular bottom plate is connected to the mounting surface through bolts.

[0013] Preferably, the positioning portion is an annular side plate, a side of the frame facing a tube shell of the compressor is formed with an annular positioning surface, the annular side plate is parallel to the positioning surface, and the annular side plate is in interference fit with the positioning surface.

[0014] According to the second aspect of the present application, a compressor is provided, wherein the compressor comprises the balance weight cover for the compressor as described above.

[0015] The balance block cover main body of the balance block cover is fixed to the support through the positioning portion.

[0016] In order to make the above objects, features and advantages of the present application more apparent, the following preferred embodiments are specifically described below with reference to the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] 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. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 is a schematic view of a first embodiment of the compressor according to the present application.

[0019] Figure 2 is a schematic view of a first embodiment of the balance block cover for the compressor according to the present application.

[0020] Figure 3 is a schematic view of a second embodiment of the compressor according to the present application.

[0021] Figure 4 is a schematic view of a second embodiment of the balance block cover for the compressor according to the present application.

[0022] Figure 5 is a schematic view of another angle of the second embodiment of the balance block cover for the compressor according to the present application.

[0023] Reference numerals: 1 - balance weight cover main body; 10 - opening; 100 - through hole; 11 - first cylindrical portion; 111 - first annular plate portion; 112 - first annular end plate; 12 - second cylindrical portion; 121 - second annular plate portion; 122 - second annular end plate; 21 - annular bottom plate; 210 - positioning hole; 22 - annular side plate; 3 - main balance weight; 4 - crankshaft; 5 - frame; 51 - positioning surface; 52 - mounting surface; 6 - motor; 7 - tube; 8 - oil pool; 9 - space; 90 - gap. DETAILED DESCRIPTION

[0024] The following detailed description is presented to aid the reader in gaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents can be used, and the

[0025] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples have been provided so that this disclosure will be thorough and complete, and will fully convey the scope of the methods, apparatuses, and / or systems to those skilled in the art. Accordingly, the features described herein should not be construed as limiting, but merely as illustrative.

[0026] Throughout the specification, when an element (such as a layer, region, or substrate) is referred to as being "on" another element, "connected to" another element, "coupled to" another element, "adjacent to" another element, or "covering" another element, it can be directly on, connected, coupled, adjacent to, or covering the other element or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to," "directly adjacent to," or "directly covering" another element, there are no other elements interposed therebetween.

[0027] As used herein, the term "and / or" includes any one of the listed items and any combination of two or more of the listed items.

[0028] Although terms such as "first" and "second" and "third" can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, terms of a first element, component, region, layer or section described herein could also be termed a second element, component, region, layer or section without departing from the teachings of the examples.

[0029] For ease of description, spatial relationship terms, such as "on", "upper", "under", and "lower", can be used herein to describe the relationship between one element and another element as shown in the drawings. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, an element described as on "upper" or "upper" relative to another element would then be oriented "under" or "lower" relative to the other element. Accordingly, the term "on" encompasses both an "on" and "under" orientation based on the spatial orientation of the device. The device can be positioned in other ways (e.g., rotated 90 degrees or at other orientations) and an appropriate recitation of the spatial relationship terms will be made accordingly.

[0030] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of examples. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has", "having" and "contains", "containing" are inclusive and do not exclude other

[0031] Variations in shapes that are shown in the drawings can occur as a result of manufacturing processes and / or tolerances. Thus, the examples described herein are not limited to the precise shapes shown in the drawings, but include variations in shapes that occur as a result of manufacturing processes.

[0032] Features of the examples described herein can be combined with one another as would be apparent to one of ordinary skill in the art after understanding the disclosure provided herein. Furthermore, although examples are described herein with various configurations, other configurations are possible as would be apparent to one of ordinary skill in the art after understanding the disclosure provided herein.

[0033] As Figures 1 to 5 As shown, a balance block cover for a compressor according to a first aspect of the present application includes a balance block cover main body 1 and a positioning portion.

[0034] In the following description, reference will be made to Figures 1 to 5 The specific structure of the aforementioned components of the balance block cover for the compressor and the connection relationship of the aforementioned components are described in detail.

[0035] like Figures 1 to 5 As shown, in this embodiment, the balance block cover body 1 can cover the outside of the compressor's main balance block 3, and the compressor's crankshaft 4 can pass through the balance block cover body 1. During the rotation of the main balance block 3 driven by the crankshaft 4, the main balance block 3 can rotate relative to the balance block cover body 1. A positioning part can be provided on the side of the balance block cover body 1 near the compressor's frame 5. The balance block cover body 1 is mounted to the frame 5 via the positioning part. This arrangement ensures that the main balance block 3 moves only within the space 9 formed by the balance block cover body 1 and the frame 5, thereby separating the main balance block 3 from the refrigerant flow and oil sump 8, thus reducing the resistance and noise generated by the main balance block 3 during rotation.

[0036] Preferred, such as Figures 1 to 4 As shown, in this embodiment, the balance weight cover body 1 is mounted at the end of the frame 5 to enclose a space 9 for accommodating the main balance weight 3. A circular opening 10 may be formed at the end of the balance weight cover body 1 near the frame 5. A positioning part may be provided at the opening 10, and the positioning part may be integrally formed with the balance weight cover body 1. A circular passage 100 may be provided at the center of the end of the balance weight cover body 1 away from the frame 5. The passage 100 is used for the crankshaft 4 to pass through the balance weight cover body 1.

[0037] Preferred, such as Figures 1 to 5 As shown, in this embodiment, the outer periphery of the main balance block 3 may have a stepped portion. To allow the balance block cover body 1 to adapt to the shape of the main balance block 3, the balance block cover body 1 may include a first cylindrical portion 11 and a second cylindrical portion 12. The first cylindrical portion 11 and the second cylindrical portion 12 may be coaxially arranged with the crankshaft 4. The second cylindrical portion 12 can be connected to the frame 5 via the first cylindrical portion 11. Specifically, an opening 10 may be provided at the end of the first cylindrical portion 11 near the frame 5, and a positioning portion may be provided at the opening 10. The first cylindrical portion 11 can be mounted to the frame 5 via the positioning portion. The second cylindrical portion 12 may be connected to the end of the first cylindrical portion 11 away from the frame 5, and the second cylindrical portion 12 may be integrally formed with the first cylindrical portion 11. An opening 100 may be provided at the end of the second cylindrical portion 12 away from the first cylindrical portion 11. Preferably, the diameter of the second cylindrical portion 12 is smaller than the diameter of the first cylindrical portion 11.

[0038] Furthermore, preferably, such as Figures 1 to 5As shown in the embodiment, the first cylindrical portion 11 can include a first annular plate portion 111 and a first annular end plate 112. The plate surface of the first annular plate portion 111 can be arranged parallel to the axis of the crankshaft 4. The positioning portion can be arranged at the end of the first annular plate portion 111 close to the frame 5 to connect the first annular plate portion 111 and the frame 5. The plate surface of the first annular end plate 112 can be arranged perpendicular to the axis of the crankshaft 4. The outer ring of the first annular end plate 112 can be connected to the end of the first annular plate portion 111 away from the frame 5, and the first annular end plate 112 can be integrally formed with the first annular plate portion 111.

[0039] Further preferably, as shown in the embodiment, Figures 1 to 5 As shown in the embodiment, the second cylindrical portion 12 can include a second annular plate portion 121 and a second annular end plate 122. The plate surface of the second annular plate portion 121 can be arranged parallel to the axis of the crankshaft 4. The end of the second annular plate portion 121 close to the frame 5 can be connected to the inner ring of the first annular end plate 112, and the second annular plate portion 121 can be integrally formed with the first annular end plate 112. The plate surface of the second annular end plate 122 can be arranged perpendicular to the axis of the crankshaft 4. The outer ring of the second annular end plate 122 can be connected to the end of the second annular plate portion 121 away from the frame 5, and the second annular end plate 122 can be integrally formed with the second annular plate portion 121. The inner ring of the second annular end plate 122 can be the through hole 100.

[0040] Further preferably, as shown in the embodiment, Figure 1 and Figure 2 As shown in the embodiment, the positioning portion can be an annular side plate 22. The annular side plate 22 is parallel to the axis of the crankshaft 4 and integrally formed with the first annular plate portion 111. The annular side plate 22 can be regarded as an extension of the first annular plate portion 111. The side of the frame 5 facing the compressor shell 7 can be formed with an annular positioning surface 51. The annular side plate 22 is parallel to the positioning surface 51. The annular side plate 22 can be in interference fit with the positioning surface 51, thereby fixing the balance block cover main body 1 to the frame 5.

[0041] Not limited thereto, preferably, as shown in the embodiment, Figures 3 to 5In the shown embodiment, the positioning portion can be a ring-shaped bottom plate 21. The ring-shaped bottom plate 21 is perpendicular to the axis of the crankshaft 4 and is integrally formed with the first ring-shaped plate portion 111. Preferably, a circular arc transition portion can be formed at the joint of the ring-shaped bottom plate 21 and the first ring-shaped plate portion 111. A plurality of positioning holes 210 can be provided on the plate surface of the ring-shaped bottom plate 21 at intervals in the circumferential direction, and the positioning holes 210 are used for passing threaded fasteners. An annular mounting surface 52 can be formed on the side of the frame 5 facing the motor 6 of the compressor. The ring-shaped bottom plate 21 is parallel to the mounting surface 52. The ring-shaped bottom plate 21 can be connected to the mounting surface 52 by bolts, thereby fixing the balance weight cover main body 1 to the frame 5.

[0042] Preferably, as shown in the embodiment, Figure 1 and Figure 3 In the embodiment, the main balance weight 3 can be fixedly installed on the crankshaft 4. During operation of the compressor, the motor 6 of the compressor drives the crankshaft 4 to rotate and drives the main balance weight 3 to rotate synchronously around the axis of the crankshaft 4. During this process, the motion trajectory of the main balance weight 3 forms a solid of revolution. Since the balance weight cover main body 1 is installed on the frame 5 by the positioning portion, during operation of the compressor, the balance weight cover main body 1 remains relatively stationary, and the main balance weight 3 rotates inside the balance weight cover main body 1. In order to avoid interference and friction between the balance weight cover main body 1 and the main balance weight 3 during operation of the compressor, a gap 90 can be formed between the inner wall of the balance weight cover main body 1 and the motion trajectory of the main balance weight 3. More preferably, the width of the gap 90 can be 3mm-6mm, so as to avoid the size of the balance weight cover main body 1 being too large.

[0043] In addition, according to the second aspect of the present application, a compressor is provided, which comprises a main balance weight 3, a frame 5, and a balance weight cover for a compressor as described above. The balance weight cover for a compressor is installed on the frame 5. The main balance weight 3 moves in the space 9 enclosed by the balance weight cover for a compressor and the frame 5.

[0044] During use, the balance weight cover for a compressor can separate the main balance weight 3 from the refrigerant gas flow and the oil pool 8, thereby reducing the resistance experienced by the main balance weight 3 during rotation. In turn, it can effectively reduce the power loss of the main balance weight 3 due to the resistance of the refrigerant gas flow and the oil pool 8, and can significantly reduce the noise, thereby improving the overall performance of the compressor.

[0045] 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. 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, it should be understood by those skilled in the art that any skilled person in the art can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features, within the technical scope disclosed by the present application. The 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 balance weight cover for a compressor, provided in a compressor, characterized by, The balance weight cover for the compressor comprises: a balance weight cover body, which covers the outside of a main balance weight of the compressor, a crankshaft of the compressor passes through the balance weight cover body, and the main balance weight is rotatable relative to the balance weight cover body; and a positioning portion, which is arranged on the side of the balance weight cover body close to a frame of the compressor and is mounted on the frame.

2. The balance weight cover for a compressor according to claim 1, characterized by A gap is formed between the inner wall of the balance weight cover body and the movement track of the main balance weight.

3. The balance weight cover for a compressor according to claim 2, characterized by The width of the gap is 3-6 mm.

4. The balance weight cover for a compressor as set forth in claim 1, characterized by An opening is formed on the end of the balance weight cover body close to the frame, the positioning portion is arranged in the opening, and a through hole for the crankshaft is formed in the center of the end of the balance weight cover body away from the frame.

5. The balance weight cover for a compressor as set forth in claim 4, characterized by The balance weight cover body comprises: a first cylindrical portion, the opening is arranged on the end of the first cylindrical portion close to the frame, and the first cylindrical portion is mounted on the frame through the positioning portion; and a second cylindrical portion, the diameter of the second cylindrical portion is smaller than that of the first cylindrical portion, the second cylindrical portion is connected to the end of the first cylindrical portion away from the frame, and the through hole is formed on the end of the second cylindrical portion away from the first cylindrical portion.

6. The balance weight cover for a compressor as set forth in claim 5, characterized by The first cylindrical portion comprises: a first annular plate portion, the plate surface of the first annular plate portion is parallel to the axis of the crankshaft, and the positioning portion is arranged on the end of the first annular plate portion close to the frame; and a first annular end plate, the outer ring of the first annular end plate is connected to the end of the first annular plate portion away from the frame, and the plate surface of the first annular end plate is perpendicular to the axis of the crankshaft.

7. The balance weight cover for a compressor as set forth in claim 6, characterized by The second cylindrical portion comprises: a second annular plate portion, the plate surface of the second annular plate portion is parallel to the axis of the crankshaft, and the end of the second annular plate portion close to the frame is connected to the inner ring of the first annular end plate; and a second annular end plate, the outer ring of the second annular end plate is connected to the end of the second annular plate portion away from the frame, the inner ring of the second annular end plate is the through hole, and the plate surface of the second annular end plate is perpendicular to the axis of the crankshaft.

8. The balance weight cover for a compressor according to any one of claims 1 to 7, characterized by, The positioning portion is an annular bottom plate, a plurality of positioning holes are arranged on the annular bottom plate at intervals in the circumferential direction, the side of the frame facing the motor of the compressor is provided with an annular mounting surface, the annular bottom plate is parallel to the mounting surface, and the annular bottom plate is connected to the mounting surface through bolts.

9. The balance weight cover for a compressor according to any one of claims 1 to 7, characterized by, The positioning portion is an annular side plate, the side of the frame facing the tube shell of the compressor is provided with an annular positioning surface, the annular side plate is parallel to the positioning surface, and the annular side plate is in interference fit with the positioning surface.

10. A compressor characterized by, The compressor comprises a main balance weight, a frame, and the balance weight cover for the compressor according to any one of claims 1-9, the balance weight cover for the compressor is mounted on the frame, and the main balance weight moves in the space surrounded by the balance weight cover for the compressor and the frame.

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