Pump body assembly, compressor and refrigerating system
By setting concave and convex surfaces on the inner wall of the silencer and the second bearing, the turbulent boundary layer is disrupted and diffuse reflection is achieved, thus solving the noise problem of the pump body assembly, achieving better noise reduction and reducing production costs.
Patent Information
- Application Number
- CN202423174206.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-19
AI Technical Summary
The existing pump assembly is prone to turbulent boundary layer pressure pulsation after the muffler is installed, resulting in noise problems.
The inner wall surfaces of the muffler and the second bearing are provided with concave and convex surfaces to form vortices to disrupt the turbulent boundary layer and to reduce noise through diffuse reflection. At least one of the inner wall surfaces of the muffler and the second bearing is a concave and convex surface to reduce airflow pressure pulsation and noise.
It effectively reduces airflow noise, improves the soundproofing effect, and simplifies the processing steps to reduce production costs.
Smart Images
Figure CN223459515U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to refrigeration equipment technical field, specifically, a kind of pump body assembly, compressor and refrigeration system. BACKGROUND
[0002] Pump body assembly is the core component of compressor, mainly including crankshaft, bearing component, compression cylinder and muffler and the like structure. Among them, the role of main bearing in bearing component is: for sealing cylinder and forming compression cavity;For connecting with compressor shell to fix pump body assembly;For cooperating with muffler to form sound attenuation cavity.
[0003] In related art, after installing muffler on main bearing, turbulent boundary layer pressure pulsation is easily generated in sound attenuation cavity, and then noise is generated, and the use comfort of pump body assembly. UTILITY MODEL CONTENT
[0004] The main purpose of the utility model is to provide a kind of pump body assembly, compressor and refrigeration system, to at least solve the problem of big noise of pump body assembly in related art.
[0005] According to one aspect of the utility model, a kind of pump body assembly is provided, comprising:
[0006] Crankshaft, the eccentric part is provided on the crankshaft;
[0007] Compression cylinder, the compression cylinder is sleeved on the crankshaft and located at the outer circumferential side of the eccentric part;
[0008] First bearing, the first bearing is sleeved on the crankshaft and located at the first side of the compression cylinder, and the first bearing is fixedly connected with the compression cylinder;
[0009] Second bearing, the second bearing is sleeved on the crankshaft and located at the second side of the compression cylinder opposite to first side, the second bearing is fixedly connected with the compression cylinder, the second bearing, the first bearing and the compression cylinder are surrounded to form compression cavity, and the second bearing is provided with exhaust hole communicated with the compression cavity;
[0010] Muffler, the muffler is fixed on the side of the second bearing away from the compression cylinder and is surrounded to form sound attenuation cavity with the second bearing, and the exhaust end of the exhaust hole is located in the sound attenuation cavity;
[0011] Wherein, at least one of the surface of the sound attenuation cavity inner wall surface formed on the muffler and the surface of the sound attenuation cavity inner wall surface formed on the second bearing is concave-convex surface.
[0012] Further, the second bearing comprises a main body and a shaft handle, the main body is arranged against the compression cylinder, the main body is provided with the exhaust hole, and the shaft handle is arranged on the side of the main body away from the compression cylinder and is sleeved on the crankshaft;
[0013] The muffler is sleeved on the shaft handle and covers the side of the main body away from the compression cylinder, and the side of the shaft handle facing the sound-absorbing cavity and the side of the main body facing the sound-absorbing cavity are both provided with the concave-convex surface.
[0014] Further, the side of the shaft handle facing the sound-absorbing cavity and the side of the main body facing the sound-absorbing cavity are partially or entirely provided with the concave-convex surface.
[0015] Further, the surface of the main body away from the compression cylinder is provided with the concave-convex surface, the concave-convex surface is a circular surface, and the circular surface is coaxially arranged with the shaft handle.
[0016] Further, the diameter D of the circular surface satisfies the relationship: 30mm≤D≤100mm.
[0017] Further, the muffler is provided with a mounting hole, the muffler is sleeved on the shaft handle through the mounting hole, and an exhaust gap is arranged between the mounting hole, the inner wall surface and the outer peripheral surface of the shaft handle.
[0018] Further, the roughness of the concave-convex surface is greater than or equal to Rz12.5.
[0019] Further, the concave-convex surface comprises a sand casting surface.
[0020] In another aspect, the application further provides a compressor comprising the pump body assembly.
[0021] In a third aspect, the application further provides a refrigeration system comprising the compressor.
[0022] In the utility model, in the sound-absorbing cavity, at least one of the surface of the muffler forming the inner wall surface of the sound-absorbing cavity and the surface of the second bearing forming the inner wall surface of the sound-absorbing cavity is a concave-convex surface, when the airflow passes through the concave-convex surface, vortex is formed, the turbulent boundary layer is destroyed, the pressure pulsation of the airflow is reduced, and the noise generated by the airflow flow is reduced.At the same time, when the sound wave in the sound-absorbing cavity is transmitted to the concave-convex surface, diffuse reflection is generated, the sound wave can be reflected in different directions, the mutual offset of sound waves in different directions can be realized, and the sound-absorbing effect of the sound-absorbing cavity is further improved.
[0023] In addition, in the application, at least one of the surface forming the inner wall surface of the sound attenuation cavity on the muffler and the surface forming the inner wall surface of the sound attenuation cavity on the second bearing is a concave-convex surface, so that the concave-convex surface can be obtained without machining the blank surface of the second bearing and the muffler during actual machining of the second bearing and the muffler, the machining process during production of the pump body assembly can be reduced, and the production cost of the pump body assembly can be reduced. BRIEF DESCRIPTION OF DRAWINGS
[0024] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:
[0025] Figure 1 A sectional view of the compressor disclosed in the embodiments of the present application is shown in FIG. 2.
[0026] Figure 2 A perspective view of the second bearing disclosed in the embodiments of the present application is shown in FIG. 3.
[0027] Figure 3 A top view of the second bearing in FIG. 3 is shown in FIG. 4. Figure 2
[0028] A perspective view of another second bearing disclosed in the embodiments of the present application is shown in FIG. 5. Figure 4
[0029] A top view of the second bearing in FIG. 5 is shown in FIG. 6. Figure 5 Figure 4 A sectional view of the muffler installed on the second bearing in FIG. 5 is shown in FIG. 7.
[0030] Figure 6 A sectional view of the muffler installed on the second bearing in FIG. 5 is shown in FIG. 7. Figure 2
[0031] In the above drawings, the following reference signs are used:
[0032] 10, pump body assembly; 11, crankshaft; 111, eccentric part; 12, compression cylinder; 13, first bearing; 14, second bearing; 141, main body; 142, shaft handle; 1411, exhaust hole; 1412, concave-convex surface; 15, muffler; 151, mounting hole; 16, exhaust gap; 17, compression cavity; 18, sound attenuation cavity; 19, piston; 20, motor; 30, exhaust pipe; 40, shell. DETAILED DESCRIPTION
[0033] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.
[0034] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. 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. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.
[0035] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of providing an understanding of the example embodiments. Technical, methods, and apparatuses known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered part of the specification as appropriate. In all examples shown and discussed herein, any specific value is to be interpreted as merely an example, and not as a limitation. Thus, other examples of example embodiments can have different values. It is noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further discussion regarding a part illustrated in a figure will be "further discussed" in a subsequent figure.
[0036] Referring to Figures 1 to 6 As shown, according to the embodiments of the present application, a pump body assembly 10 is provided, which is a pump body assembly 10 of a compressor. Specifically, the pump body assembly 10 comprises a crankshaft 11, a compression cylinder 12, a first bearing 13, and a second bearing 14.
[0037] The crankshaft 11 is provided with an eccentric portion 111; the compression cylinder 12 is sleeved on the crankshaft 11 and located at the outer peripheral side of the eccentric portion 111; the first bearing 13 is sleeved on the crankshaft 11 and located at the first side of the compression cylinder 12, and the first bearing 13 is fixedly connected with the compression cylinder 12; the second bearing 14 is sleeved on the crankshaft 11 and located at the second side of the compression cylinder 12 opposite to the first side, the second bearing 14 is fixedly connected with the compression cylinder 12, and the second bearing 14, the first bearing 13, and the compression cylinder 12 form a compression cavity 17; the second bearing 14 is provided with an exhaust hole 1411 communicating with the compression cavity 17; the muffler 15 is fixed to the side of the second bearing 14 away from the compression cylinder 12 and forms a muffling cavity 18 with the second bearing 14, and the exhaust end of the exhaust hole 1411 is located in the muffling cavity 18; wherein at least one of the surface of the muffler 15 constituting the inner wall surface of the muffling cavity 18 and the surface of the second bearing 14 constituting the inner wall surface of the muffling cavity 18 is a concave-convex surface 1412.
[0038] After assembling the pump body assembly 10 in this embodiment, the two sides of the compression cylinder 12 are fixed and limited by the first bearing 13 and the second bearing 14 respectively. During actual connection, the first bearing 13 and the second bearing 14 are fixedly connected to the compression cylinder 12 by screws, bolts and other structures.
[0039] During operation, the crankshaft 11 is driven to rotate by a drive structure such as the motor 20. The rotation of the crankshaft 11 drives the eccentric portion 111 to drive the piston 19 of the compression cylinder 12, thereby compressing the refrigerant entering the compression cylinder 12. The compressed refrigerant is then discharged into the muffler chamber 18 through the exhaust hole 1411 on the second bearing 14. Within the muffler chamber 18, at least one of the surfaces of the muffler 15 forming the inner wall of the muffler chamber 18 and the surfaces of the second bearing 14 forming the inner wall of the muffler chamber 18 is a concave-convex surface 1412. When the airflow passes through the concave-convex surface 1412, vortices are formed, destroying the turbulent boundary layer, reducing the pressure pulsation of the airflow, and reducing the noise generated by the airflow. At the same time, when the sound waves within the muffler chamber 18 are transmitted to the concave-convex surface 1412, diffuse reflection occurs. The sound waves can be reflected in different directions, which can achieve mutual cancellation of sound waves in different directions, further improving the muffler effect of the muffler chamber 18.
[0040] In addition, in this embodiment, by making at least one of the surface of the silencer 15 constituting the inner wall of the silencer chamber 18 and the surface of the second bearing 14 constituting the inner wall of the silencer chamber 18 a concave-convex surface 1412, when the second bearing 14 and the silencer 15 are actually processed, the concave-convex surface 1412 can be obtained without processing the blank surfaces of the second bearing 14 and the silencer 15, which can reduce the processing steps in the production process of the pump body assembly 10 and reduce the production cost of the pump body assembly 10.
[0041] Furthermore, the pump assembly 10 in this embodiment further includes a piston 19, which is sleeved around the outer periphery of the eccentric portion 111. During operation, the eccentric portion 111 rotates to drive the piston 19 to drive the piston on the compression cylinder 12, i.e., the sliding vane, to compress the refrigerant in the compression chamber 17. The provision of the piston 19 can reduce friction during operation of the pump assembly, thereby increasing the service life and stability of the pump assembly.
[0042] See also Figures 2 to 6As shown, the second bearing 14 in the embodiment includes a main body 141 and a shaft handle 142, wherein the main body 141 is arranged against the compression cylinder 12 and fixedly connected with the compression cylinder 12 through structural members such as bolts or screws, and the main body 141 is provided with the above-mentioned exhaust hole 1411, and the shaft handle 142 is arranged on the side of the main body 141 away from the compression cylinder 12 and is sleeved on the crankshaft 11. In actual production, the shaft handle 142 is integrally formed with the main body 141. The muffler 15 is sleeved on the shaft handle 142 and covers the side of the main body 141 away from the compression cylinder 12 to form the sound insulation cavity 18, and the side of the shaft handle 142 facing the sound insulation cavity 18 and the side of the main body 141 facing the sound insulation cavity 18 both have a concave-convex surface 1412. Through the action of the concave-convex surface 1412, the sound waves in the sound insulation cavity 18 can be diffusely reflected, and the turbulent boundary layer of the airflow can be destroyed, thereby effectively improving the noise reduction effect of the muffler 15.
[0043] Of course, in other embodiments of the present application, the concave-convex surface 1412 can also be arranged on the side wall surface of the muffler 15 facing the sound insulation cavity 18. Exemplarily, the muffler 15 in the present application is arranged in a cover body structure, which is sleeved on the shaft handle 142 and covers the side of the main body 141 away from the compression cylinder 12. In actual design, the inner surface of the cover body structure can be arranged as the concave-convex surface 1412.
[0044] Further, the side of the shaft handle 142 facing the sound insulation cavity 18 and the side of the main body 141 facing the sound insulation cavity 18 can be partially or entirely arranged as the concave-convex surface 1412, that is, the side of the shaft handle 142 close to the muffler 15 and the side of the main body 141 close to the sound insulation cavity 18 can all be the concave-convex surface 1412, or can be partially the concave-convex surface 1412. The specific selection and use are based on actual use and processing difficulty.
[0045] In some embodiments of the present application, the surface of the main body 141 away from the compression cylinder 12 has the concave-convex surface 1412, which is a circular surface coaxially arranged with the shaft handle 142. In this way, when the outer surface of the second bearing 14 is processed, only the outer peripheral rough surface of the second bearing 14 needs to be smoothed, which is simple in structure and convenient to process. Of course, in other embodiments of the present application, the concave-convex surface 1412 can also be arranged as a square surface, an elliptical surface, or a petal-shaped surface. As long as it is other deformation modes under the concept of the present application, it is within the protection scope of the present application.
[0046] Exemplarily, the diameter D of the circular face in the present application satisfies the relationship: 30mm≤D≤100mm, for example, the diameter D of the circular face can be 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm or 100mm, etc. By making the diameter D of the circular face satisfy the relationship: 30mm≤D≤100mm in the present embodiment, not only can the turbulent boundary layer of the airflow entering the sound damping cavity 18 be well improved, but also the sound waves can be effectively diffused and reflected, and the processing is facilitated.
[0047] Further, in order to facilitate installation and use, the muffler 15 is provided with a mounting hole 151, the muffler 15 is sleeved on the shaft handle 142 through the mounting hole 151, and an exhaust gap 16 is arranged between the inner wall surface of the mounting hole 151 and the outer peripheral surface of the shaft handle 142. Through the action of the exhaust gap 16, the compressed gas can be easily discharged to the outside of the pump body assembly 10.
[0048] Optionally, the roughness of the concave-convex face 1412 in the present embodiment is greater than or equal to Rz12.5. The "roughness" generally refers to the opposite expression of the smoothness of a surface. In the present application, the "roughness" is a quantitative index used to describe the microscopic unevenness degree of the surface of a part. The roughness of the concave-convex face 1412 in the present embodiment greater than or equal to Rz12.5 means that the distance between the peaks and valleys of the concave-convex face 1412 is not less than 12.5 microns. By making the roughness of the concave-convex face 1412 greater than or equal to 12.5 in the present embodiment, the turbulent boundary layer of the airflow in the sound damping cavity 18 can be well destroyed, the sound waves can be diffused and reflected, and at the same time, the roughness of the concave-convex face 1412 can generally meet the blank surface, without the need for other processing procedures.
[0049] Exemplarily, the concave-convex face 1412 in the present embodiment includes a sand casting face, that is, the concave-convex face 1412 in the present embodiment can be formed when the second bearing 14 or the muffler 15 is cast, without the need for a specific processing procedure, which can reduce the manufacturing cost of the pump body assembly 10.
[0050] On the other hand, in combination with the above Figures 1 to 6As shown, the embodiment of the present application further provides a compressor, the compressor in the embodiment includes a compressor shell 40, a pump body assembly 10 arranged inside the shell 40, and a motor 20 drivingly connected with a crankshaft 11 of the pump body assembly 10. The motor 20 drives the crankshaft 11 to rotate, which can drive the eccentric part 111 to drive the piston of the compression cylinder 12 to move, so as to compress the refrigerant entering the compression cylinder 12. The compressed refrigerant is discharged to the muffling cavity 18 through the exhaust hole 1411 on the second bearing 14, and is discharged from the exhaust gap 16 into the shell 40 after the sound attenuation treatment by the muffler 15, and finally discharged from the exhaust pipe 30 on the shell 40. In the muffling cavity 18, at least one of the surface constituting the inner wall surface of the muffling cavity 18 on the muffler 15 and the surface constituting the inner wall surface of the muffling cavity 18 on the second bearing 14 is a concave-convex surface 1412. When the airflow passes through the concave-convex surface 1412, the vortex is formed, the turbulent boundary layer is destroyed, the pressure pulsation of the airflow is reduced, and the noise generated by the airflow is reduced. At the same time, when the sound wave in the muffling cavity 18 is transmitted to the concave-convex surface 1412, the diffuse reflection is generated, the sound wave can be reflected in different directions, the mutual cancellation of sound waves in different directions can be realized, and the sound attenuation effect of the muffling cavity 18 is further improved.
[0051] In addition, in the embodiment, by making at least one of the surface constituting the inner wall surface of the muffling cavity 18 on the muffler 15 and the surface constituting the inner wall surface of the muffling cavity 18 on the second bearing 14 a concave-convex surface 1412, the concave-convex surface 1412 can be obtained without machining the blank surface of the second bearing 14 and the muffler 15 during actual machining of the second bearing 14 and the muffler 15, the machining process in the production process of the pump body assembly 10 can be reduced, and the production cost of the pump body assembly 10 and the compressor can be reduced.
[0052] Referring to Figure 1As shown, in order to facilitate assembly, the shell 40 in the embodiment comprises a ring-shaped shell part and cover structures arranged at the top and bottom of the ring-shaped shell part, and the ring-shaped shell part and the shell arranged at the top and bottom of the ring-shaped shell part form a closed space. In actual installation, the pump body assembly 10 is installed in the closed space, the axis of the crankshaft 11 of the pump body assembly 10 coincides with the center of the ring-shaped shell part, the outer diameter of the second bearing 14 on the pump body assembly 10 is matched with the inner cavity of the ring-shaped shell part, so as to facilitate the limitation of the pump body assembly 10 inside the shell 40, and the bottom of the shell 40 has an oil pool, so as to facilitate the provision of lubricating oil for the pump body assembly 10. In operation, the refrigerant enters the compression cylinder 12 from the external pipeline, the motor 20 rotates to drive the rotation of the crankshaft 11, and then the eccentric part 111 and the piston 19 can compress the refrigerant in the compression cylinder 12, the compressed refrigerant is discharged to the sound attenuation cavity 18 through the exhaust hole 1411 on the second bearing 14, is discharged to the outside of the pump body assembly 10 after sound attenuation treatment through the exhaust gap 16, and is finally discharged out of the compressor through the exhaust pipe 30.
[0053] In a third aspect, the embodiments of the present application also provide a refrigeration system, which comprises the compressor described above, and therefore, the refrigeration system comprises all the technical effects of the compressor, and since the technical effects of the compressor have been described in detail above, no further description is given here.
[0054] For the convenience of description, spatial relative terms such as "above", "upper", "top", "up", etc. can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The devices can also be positioned in other different ways (rotated by 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.
[0055] In addition, it should be noted that the use of the terms "first", "second", etc. to define parts only facilitates the differentiation of the corresponding parts, and the above terms have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the protective scope of the utility model.
[0056] The above are only preferred embodiments of the present application, and are not used to limit the present application, and for those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A pump body assembly, characterized by, The application relates to a crankshaft (11) provided with an eccentric part (111); a compression cylinder (12) sleeved on the crankshaft (11) and located at the outer periphery of the eccentric part (111); a first bearing (13) sleeved on the crankshaft (11) and located at a first side of the compression cylinder (12), and fixedly connected with the compression cylinder (12); a second bearing (14) sleeved on the crankshaft (11) and located at a second side opposite to the first side of the compression cylinder (12), fixedly connected with the compression cylinder (12), and surrounded by the second bearing (14), the first bearing (13) and the compression cylinder (12) to form a compression cavity (17), and provided with an exhaust hole (1411) communicating with the compression cavity (17); and a muffler (15) fixed to the side of the second bearing (14) away from the compression cylinder (12) and surrounded by the second bearing (14) to form a muffling cavity (18), and the exhaust end of the exhaust hole (1411) is located in the muffling cavity (18); wherein at least one of the surface of the muffler (15) forming the inner wall surface of the muffling cavity (18) and the surface of the second bearing (14) forming the inner wall surface of the muffling cavity (18) is a concave-convex surface (1412). The second bearing (14) comprises a main body (141) and a shaft handle (142), the main body (141) is arranged against the compression cylinder (12), the exhaust hole (1411) is arranged on the main body (141), and the shaft handle (142) is arranged on the side of the main body (141) away from the compression cylinder (12) and is sleeved on the crankshaft (11). The muffler (15) is sleeved on the shaft handle (142) and covers the side of the main body (141) away from the compression cylinder (12), the side of the shaft handle (142) facing the muffling cavity (18) and the side of the main body (141) facing the muffling cavity (18) are provided with the concave-convex surface (1412). The side of the shaft handle (142) facing the muffling cavity (18) and the side of the main body (141) facing the muffling cavity (18) are partially or entirely provided with the concave-convex surface (1412). The surface of the main body (141) away from the compression cylinder (12) is provided with the concave-convex surface (1412), the concave-convex surface (1412) is a circular surface, and the circular surface is coaxially arranged with the shaft handle (142). The diameter D of the circular surface satisfies the relationship 30mm<=D<=100mm. The muffler (15) is provided with a mounting hole (151), the muffler (15) is sleeved on the shaft handle (142) through the mounting hole (151), and an exhaust gap (16) is arranged between the mounting hole (151), the inner wall surface and the outer periphery of the shaft handle (142).
2. The pump body assembly of claim 1, wherein, 3. The pump body assembly of claim 2, wherein, 4. The pump body assembly of claim 2, wherein, 5. The pump body assembly of claim 4, wherein, 6. The pump body assembly of claim 2, wherein, 7. The pump body assembly of any one of claims 1 to 6, wherein, The roughness of the concave-convex surface (1412) is greater than or equal to Rz 12.
5.
8. The pump body assembly of any one of claims 1 to 6, wherein, The concave-convex surface (1412) comprises a sand-cast surface.
9. A compressor characterized by, The compressor comprises the pump body assembly of any one of claims 1 to 8.
10. A refrigeration system characterized by, The refrigeration system comprises the compressor of claim 9.