CN219119411U - Double-cylinder compressor pump body and compressor - Google Patents
Double-cylinder compressor pump body and compressor Download PDFInfo
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- CN219119411U CN219119411U CN202320308257.8U CN202320308257U CN219119411U CN 219119411 U CN219119411 U CN 219119411U CN 202320308257 U CN202320308257 U CN 202320308257U CN 219119411 U CN219119411 U CN 219119411U
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Abstract
The utility model relates to a double-cylinder compressor pump body and a compressor, wherein the double-cylinder compressor pump body comprises an upper bearing, a first cylinder, a middle plate, a second cylinder and a lower bearing which are fixed in sequence in a detachable manner, two independent refrigerant compression working spaces are formed, the upper silencing cover and the lower silencing cover are respectively arranged on one side of the upper bearing, which is opposite to the lower bearing, and enclose to form a silencing cavity, the lower silencing cover and the lower bearing are in clearance fit, the acting force can be reduced under the condition of being installed, the radial acting force between the lower silencing cover and the lower bearing is eliminated, the deformation of the outer peripheral surface of the lower bearing and the inner wall surface of the lower silencing cover caused by interference pressing can be greatly improved, the problem of pump body blocking caused by the deformation of the lower bearing is further solved, and sound waves in the silencing cavity are reflected and refracted by the clearance, so that the sound waves are mutually interfered, and the noise reduction effect is achieved, and the test noise improvement effect is obvious.
Description
Technical Field
The utility model relates to the technical field of compressors, in particular to a double-cylinder compressor pump body and a compressor.
Background
The compressor is generally composed of an upper cover, a lower cover, a housing, a motor fixed inside to provide rotational power, and a pump body to compress refrigerant. Generally, the pump body includes an upper bearing, a lower bearing, a cylinder assembly, a piston, a crankshaft, and the like. The noise, vibration and reliability requirements on the existing single-cylinder compressor in the market are higher and higher, and as the common single-cylinder compressor increases along with the increase of the exhaust gas, the design eccentric quantity of the common single-cylinder compressor increases, so that the noise, the vibration height and the reliability of the existing single-cylinder compressor are reduced, and the market and the use requirements cannot be met, therefore, the double-cylinder compressor is gradually widely applied.
The double-cylinder compressor pump body comprises two cylinders and two bearings, an intermediate plate (or called an intermediate baffle plate) is arranged between the two cylinders, and each cylinder is detachably fixed with the intermediate plate and the two bearings through bolts and encloses to form two independent refrigerant compression spaces. In order to reduce working noise, an upper and a lower silencing covers are usually arranged outside an upper bearing and a lower bearing in the related design, the upper and the lower silencing covers are respectively enclosed with the upper bearing and the lower bearing to form a silencing cavity, the silencing cavity is communicated with the refrigerant compression space through an exhaust hole formed in the upper bearing and the lower bearing, the principle of a expansion chamber type silencer in resistance silencing is utilized, acoustic energy is reflected or consumed by means of section mutation (expansion or shrinkage) in the airflow circulation process and acoustic impedance change caused by a resonant cavity, or noise in the silencer is counteracted by acoustic wave phase difference caused by acoustic path difference.
In the prior art, referring to fig. 1-2, fig. 1 is a schematic diagram of the cooperation between a lower bearing and a lower silencing cover of a compressor in the prior art, fig. 2 is an enlarged schematic diagram of an area a shown in fig. 1, as shown in the drawing, the lower bearing 1 and the lower silencing cover 2 are installed in an interference fit, and compressed refrigerant gas in a refrigerant compression space is discharged from an exhaust port of the lower bearing into a silencing cavity between the lower bearing and the lower silencing cover; because the lower silencing cover and the lower bearing are in interference fit, no gap exists between the lower silencing cover and the outer peripheral surface of the lower bearing, gas cannot be discharged from the space between the lower silencing cover and the outer peripheral surface of the lower bearing, an opening is required to be arranged at the lower bearing, the gas reaches the upper bearing through a specific channel, and finally the gas is discharged; the space formed by the upper cover, the lower cover and the shell of the compressor is generally filled with refrigerating machine oil for lubrication, and for the vertical compressor, the oil surface of the refrigerating machine oil is generally arranged on the lower end surface of the upper bearing, so that gas refrigerant is discharged from the upper bearing, the oil surface is not stirred, the stability of the oil surface is ensured, and meanwhile, the lower oil discharge amount is ensured.
However, the following problems exist with the manner of mounting with an interference fit: when the compressor is installed, the interference cannot be too small due to the fact that sealing is required to be ensured, but the end face of the lower bearing or the inner diameter face of the lower bearing can be obviously deformed due to the fact that the interference is too large, so that the compressor is excessively high in force or is blocked; in addition, the interference fit needs to adopt a press-fitting procedure, and because of interference, the problem of foreign matter risk can be generated in the press-fitting process.
In addition, as the two refrigerant compression spaces of the double-cylinder compressor work alternately, the compressed refrigerants are respectively discharged from the exhaust holes of the two bearings, and mutual interference exists between the alternately discharged gases, so that the noise of 600-1500Hz frequency band is increased, the frequency band is just a human ear sensitive area, and the inhibition effect of the conventional noise reduction method on the frequency band is not obvious for the compressor.
Disclosure of Invention
Accordingly, an object of the present utility model is to provide a dual cylinder compressor pump body having advantages of simple structure and effective reduction of exhaust noise of the compressor.
The double-cylinder compressor pump body comprises an upper bearing, a lower bearing, a first cylinder, a second cylinder, a middle plate, an upper silencing cover and a lower silencing cover, wherein the upper bearing, the first cylinder, the middle plate, the second cylinder and the lower bearing are detachably fixed in sequence and are enclosed into two independent refrigerant compression working spaces;
the upper silencing cover and the lower silencing cover are respectively arranged on one sides of the upper bearing and the lower bearing, the upper silencing cover and the lower silencing cover are respectively enclosed with the upper bearing and the lower bearing to form a silencing cavity, the silencing cavity is correspondingly communicated with the refrigerant compression working space, and the lower silencing cover is in clearance fit with the lower bearing.
According to the pump body of the double-cylinder compressor, the existing interference fit is changed into clearance fit by improving the lower bearing and the lower silencing cover, so that the radial acting force between the lower silencing cover and the lower bearing can be eliminated during assembly, the deformation of the outer peripheral surface of the lower bearing and the inner wall surface of the lower silencing cover caused by interference press-in can be greatly improved, the problem of pump body locking caused by deformation of the lower bearing is solved, the acting force can be reduced, and the pump body is convenient to install; in addition, based on the existence of a gap between the lower bearing and the lower silencing cover, and due to the limitation of a processing technology, the shape and the width of the gap are not uniform along the circumferential direction in an actual product, so that sound waves with smaller wavelength generated by air flow in a silencing cavity between the lower bearing and the lower silencing cover can be reflected and refracted when passing through the gap, and all the sound waves interfere with each other, thereby having the effect of reducing noise, and the noise improvement effect is obvious through testing.
Further, the lower bearing comprises a bearing handle and a bearing flange arranged at one end of the bearing handle in a ring-shaped protruding mode, the lower silencing cover comprises a silencing cover body and a connecting portion connected to the edge of the silencing cover body, the connecting portion is sleeved outside the bearing flange, and the inner side face of the connecting portion is in clearance fit with the outer peripheral face of the bearing flange.
Further, the total displacement of the first cylinder and the second cylinder is VCC, and the unit is cm 3 The connecting part comprises a cylindrical structure, the inner diameter of which is D, and the units are cm 3 The outer diameter of the bearing handleD is in cm 3 Wherein
And 17000, wherein the clearance between the lower bearing and the lower silencing cover can have obvious noise inhibition effect and obvious low reduction.
Further, the outer side edge of the connecting portion has a flange bent along a direction away from the bearing flange so as to facilitate fitting between the lower bearing and the lower noise reduction cover.
Further, the silencing cover body is provided with a central hole in a penetrating mode, the central hole is coaxial with the inner hole of the lower bearing and is communicated with the inner hole of the lower bearing, the inner side surface of the silencing cover body is provided with annular convex ribs, the annular convex ribs encircle the central hole, the annular convex ribs are abutted to the end face, away from the bearing flange, of one side of the bearing handle portion, sealing performance of the silencing cavity is guaranteed, and sound waves are effectively reflected and refracted in the gap.
Further, the upper silencing cover, the upper bearing, the first cylinder, the middle plate, the second cylinder, the lower bearing and the lower silencing cover are fixedly installed through threaded fasteners in a matched mode, the threaded fasteners comprise threaded matched bolts and nuts, the fixing stability is good, and the installation operation is simple and convenient.
Further, the number of the threaded fasteners is at least 2, so that the structural stability of the equipment is ensured.
In addition, the embodiment of the utility model also provides a compressor, which comprises an upper cover, a lower cover, a shell, a liquid reservoir and the double-cylinder compressor pump body, wherein the shell is of a through tubular structure, and the upper cover and the lower cover are respectively arranged at two ends of the shell and are enclosed to form a containing cavity; the double-cylinder compressor pump body is arranged in the accommodating cavity; the liquid storage device is arranged on the outer side of the shell and is communicated with two refrigerant compression working spaces of the double-cylinder compressor pump body through connecting pipes respectively.
According to the compressor disclosed by the embodiment of the utility model, the lower bearing and the lower silencing cover of the pump body are improved, so that the noise problem can be effectively solved, and the noise problem caused by the fact that two refrigerant compression working spaces alternately work in the pump body of the double-cylinder compressor so that the gas exhausted by the two exhaust holes interfere with each other is avoided.
For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of a prior art compressor lower bearing mated with a lower muffler cover;
FIG. 2 is an enlarged schematic view of the area A shown in FIG. 1;
FIG. 3 is a schematic diagram of a pump body of a dual cylinder compressor according to embodiment 1 of the present utility model;
FIG. 4 is a schematic diagram illustrating the cooperation between the lower bearing and the lower muffler cover according to embodiment 1 of the present utility model;
FIG. 5 is an enlarged schematic view of area B of FIG. 2;
FIG. 6 is a schematic view of the lower bearing structure of embodiment 1 of the present utility model;
FIG. 7 is a schematic view of the structure of the lower muffler cover according to embodiment 1 of the present utility model;
FIG. 8 is a graph showing the results of the noise test in example 1 of the present utility model;
fig. 9 is a schematic view of a compressor according to embodiment 2 of the present utility model.
Detailed Description
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Example 1
Referring to fig. 3-5, fig. 3 is a schematic diagram of a pump body structure of a dual-cylinder compressor according to embodiment 1 of the present utility model, fig. 4 is a schematic diagram of a cooperation between a lower bearing and a lower muffler cover according to embodiment 1 of the present utility model, fig. 5 is an enlarged schematic diagram of a region B shown in fig. 2, and as shown in the drawings, embodiment 1 of the present utility model provides a pump body of a dual-cylinder compressor, which includes an upper bearing 1, a lower bearing 2, a first cylinder 3, a second cylinder 4, an intermediate plate 5, an upper muffler cover 6 and a lower muffler cover 7, wherein the upper bearing 1, the first cylinder 3, the intermediate plate 5, the second cylinder 4 and the lower bearing 2 are detachably fixed in sequence and enclose two independent refrigerant compression working spaces;
the upper silencing cover 6 and the lower silencing cover 7 are respectively arranged on one side of the upper bearing 1 and one side of the lower bearing 2, the upper silencing cover 6 and the lower silencing cover 7 are respectively enclosed with the upper bearing 1 and the lower bearing 2 to form a silencing cavity, the silencing cavity is correspondingly communicated with the refrigerant compression working space, the lower silencing cover 7 is in clearance fit with the lower bearing 2, and the silencing cavity is communicated with the outside of the pump body of the double-cylinder compressor through the clearance.
The double-cylinder compressor pump body changes the existing interference fit into clearance fit by improving the lower bearing 2 and the lower silencing cover 7, can eliminate the radial acting force between the lower silencing cover 7 and the lower bearing 2 during assembly, can greatly improve the deformation of the outer peripheral surface of the lower bearing 2 and the inner wall surface of the lower silencing cover 7 caused by interference press-in, further solves the problem of pump body clamping caused by deformation of the lower bearing 2, and can reduce the pressure entering acting force so as to facilitate assembly.
Specifically, referring to fig. 6-7, fig. 6 is a schematic view of a lower bearing structure shown in embodiment 1 of the present utility model, fig. 7 is a schematic view of a lower silencing cover structure shown in embodiment 1 of the present utility model, as shown in the drawings, the lower bearing 2 includes a bearing handle 21 and a bearing flange 22 disposed at one end of the bearing handle 21 in an annular protruding manner, the lower silencing cover 7 includes a silencing cover body 71 and a connecting portion 72 connected to an edge of the silencing cover body 71, the connecting portion 72 is sleeved outside the bearing flange 22, and a clearance fit is formed between an inner side surface of the connecting portion 72 and an outer peripheral surface of the bearing flange 22.
Because of the existence of the gap between the lower bearing 2 and the lower silencing cover 7 and the limitation of the processing technology, such as in the current production, the silencing cover adopts a stamping forming technology, in the silencing cover obtained by the actual processing, the actual roundness of the cylindrical connecting part 72 is not high, the shape and the width of the gap formed after the cylindrical connecting part is matched with the bearing flange 22 are not uniform along the circumferential direction, so that the sound wave with smaller wavelength generated by the air flow in the silencing cavity between the lower bearing 2 and the lower silencing cover 7 can be reflected and refracted when passing through the gap, and the sound waves interfere with each other, thereby the noise reduction effect is achieved.
The total displacement of the first cylinder 3 and the second cylinder 4 is V CC In cm 3 The connecting portion 72 comprises a cylindrical structure with an inner diameter D and an outer diameter D of the bearing shank 21, wherein D and D are both in mm, i.e
In the process of obtaining the technical solution of the present application, it is found that the noise improvement effect of the embodiment of the present utility model is defined in relation to the gap between the outer peripheral surface of the lower bearing 2 and the inner wall surface of the connecting portion 72, and in this embodiment, the noise actual measurement is performed on different gap widths, specifically including the overall noise of the compressor and the exhaust synthetic noise of the exhaust holes of the upper and lower bearings 2, and the test data are as shown in fig. 8, and the test data show that the noise improvement effect on the 600-1500Hz frequency band is obvious, the overall noise of the compressor is improved by 1.5-2.5dB, and the synthetic noise is improved by 2.0-3.0dB, so that when the gap meets the above definition, the gap between the lower bearing 2 and the lower silencing cover 7 can have obvious noise suppression effect, and the low noise is obvious.
Further, the outer edge of the connecting portion 72 has a flange 75 bent along a direction facing away from the bearing flange 22, wherein the outer side is defined as a side of the connecting portion 72 away from the muffler cover body 71, so as to increase the inner diameter of the opening of the cylindrical structure of the connecting portion 72, so as to facilitate the installation and installation between the lower bearing 2 and the lower muffler cover 7.
The silencing cover body 71 is provided with a central hole 73 in a penetrating mode, the central hole 73 is coaxial with and communicated with the inner hole of the lower bearing 2, the inner side surface of the silencing cover body 71 is provided with an annular convex rib 74, the annular convex rib 74 is arranged around the central hole 73, the annular convex rib 74 is abutted to the end face of one side, far away from the bearing flange 22, of the bearing handle 21, tightness of a silencing cavity is guaranteed, and sound waves are effectively reflected and refracted in the gap.
As an alternative embodiment, in this embodiment, the upper noise reduction cover 6, the upper bearing 1, the first cylinder 3, the intermediate plate 5, the second cylinder 4, the lower bearing 2, and the lower noise reduction cover 7 are mounted and fixed in a matched manner by the threaded fastener 8, specifically, the threaded fastener 8 includes a bolt and a nut in a threaded fit, so that the fixing stability is good, and the mounting operation is simple.
Further, the number of threaded fasteners 8 is at least 2, ensuring the structural stability of the device.
Example 2
Referring to fig. 9, fig. 9 is a schematic diagram of a compressor according to embodiment 2 of the present utility model, as shown in the schematic diagram, embodiment 2 of the present utility model provides a compressor, which includes an upper cover 10, a lower cover 20, a housing 30, a liquid reservoir 40, and a pump body of the dual-cylinder compressor according to embodiment 1, wherein the housing 30 has a through cylindrical structure, and the upper cover 10 and the lower cover 20 are respectively mounted at two ends of the housing 30 and enclose to form a receiving cavity; the double-cylinder compressor pump body is arranged in the accommodating cavity; the accumulator 40 is installed outside the housing 30 and communicates with two refrigerant compression working spaces of the double cylinder compressor pump body through connection pipes 50, respectively.
According to the compressor disclosed by the embodiment of the utility model, the lower bearing 2 and the lower silencing cover 7 of the pump body are improved, so that the noise problem can be effectively solved, and the noise problem caused by the mutual interference between gases exhausted from the two exhaust holes due to the alternate working of the two refrigerant compression working spaces in the pump body of the double-cylinder compressor is avoided.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (8)
1. A double cylinder compressor pump body, its characterized in that: the device comprises an upper bearing, a lower bearing, a first cylinder, a second cylinder, a middle plate, an upper silencing cover and a lower silencing cover, wherein the upper bearing, the first cylinder, the middle plate, the second cylinder and the lower bearing are detachably fixed in sequence and are enclosed into two independent refrigerant compression working spaces;
the upper silencing cover and the lower silencing cover are respectively arranged on one sides of the upper bearing and the lower bearing, the upper silencing cover and the lower silencing cover are respectively enclosed with the upper bearing and the lower bearing to form a silencing cavity, the silencing cavity is correspondingly communicated with the refrigerant compression working space, the lower silencing cover is in clearance fit with the lower bearing, and the silencing cavity is communicated with the outside of the pump body of the double-cylinder compressor through the clearance.
2. The dual cylinder compressor pump as set forth in claim 1, wherein: the lower bearing comprises a bearing handle and a bearing flange arranged at one end of the bearing handle in a ring-shaped protruding mode, the lower silencing cover comprises a silencing cover body and a connecting portion connected to the edge of the silencing cover body, the connecting portion is sleeved outside the bearing flange, and the inner side face of the connecting portion is in clearance fit with the outer peripheral face of the bearing flange.
3. The dual cylinder compressor pump as set forth in claim 2 wherein: the total displacement of the first air cylinder and the second air cylinder is V CC In cm 3 The connecting part comprises a cylindrical structure, the inner diameter of the cylindrical structure is D, the unit is mm, the outer diameter of the bearing handle is D, the unit is mm, and the connecting part comprises a cylindrical structure, wherein
4. The dual cylinder compressor pump as set forth in claim 2 wherein: the outer side edge of the connecting part is provided with a convex edge which is bent back to the bearing flange.
5. The dual cylinder compressor pump as set forth in claim 2 wherein: the silencing cover body is provided with a central hole in a penetrating mode, the central hole is coaxial with the inner hole of the lower bearing and is communicated with the inner hole of the lower bearing, the inner side surface of the silencing cover body is provided with an annular convex rib, the annular convex rib surrounds the central hole, and the annular convex rib is abutted to one side end face, away from the bearing flange, of the bearing handle portion.
6. The dual cylinder compressor pump as set forth in claim 1, wherein: the upper silencing cover, the upper bearing, the first cylinder, the middle plate, the second cylinder, the lower bearing and the lower silencing cover are fixedly installed through threaded fasteners in a matched mode, and the threaded fasteners comprise bolts and nuts in threaded fit.
7. The dual cylinder compressor pump as set forth in claim 6, wherein: the number of threaded fasteners is at least 2.
8. A compressor, characterized in that: the double-cylinder compressor pump body comprises an upper cover, a lower cover, a shell, a liquid reservoir and the double-cylinder compressor pump body according to any one of claims 1-7, wherein the shell is of a through tubular structure, and the upper cover and the lower cover are respectively arranged at two ends of the shell and enclose to form a containing cavity; the double-cylinder compressor pump body is arranged in the accommodating cavity; the liquid storage device is arranged on the outer side of the shell and is communicated with two refrigerant compression working spaces of the double-cylinder compressor pump body through connecting pipes respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320308257.8U CN219119411U (en) | 2023-02-23 | 2023-02-23 | Double-cylinder compressor pump body and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320308257.8U CN219119411U (en) | 2023-02-23 | 2023-02-23 | Double-cylinder compressor pump body and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219119411U true CN219119411U (en) | 2023-06-02 |
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ID=86520594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320308257.8U Active CN219119411U (en) | 2023-02-23 | 2023-02-23 | Double-cylinder compressor pump body and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219119411U (en) |
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2023
- 2023-02-23 CN CN202320308257.8U patent/CN219119411U/en active Active
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