CN112460024A

CN112460024A - Compressor housing and screw compressor

Info

Publication number: CN112460024A
Application number: CN202011489423.6A
Authority: CN
Inventors: 武晓昆; 孟强军; 龙忠铿; 刘志华; 唐晗
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-03-09

Abstract

The present disclosure provides a compressor housing and a screw compressor. The compressor housing has a chamber for the passage of a gaseous working medium, the compressor housing comprising: the shell wall main body is internally provided with at least one silencing cavity; and at least one partition wall which is respectively arranged corresponding to the at least one silencing cavity, is connected with the shell wall main body and is configured to partition the accommodating cavity and the corresponding silencing cavity, at least one communication hole which is communicated with the accommodating cavity and the corresponding silencing cavity is arranged on the partition wall, and the communication hole is configured to allow gas in the accommodating cavity to enter and exit the corresponding silencing cavity. The compressor housing and the screw compressor provided by the disclosure are beneficial to reducing the noise of the compressor.

Description

Compressor housing and screw compressor

Technical Field

The disclosure relates to the technical field of compression equipment, in particular to a compressor shell and a screw compressor.

Background

In the compression process of the screw compressor, the generated noise is mainly divided into mechanical noise and airflow noise. With the improvement of the processing precision and the assembly process of the compressor, the mechanical noise of the compressor is effectively controlled step by step. However, because the compression cavity is periodically communicated with the air suction cavity and the air exhaust cavity, the air flows unstably, the air flow pulsation of the air suction cavity and the air exhaust cavity is caused, and the vibration noise in the air suction cavity and the air exhaust cavity is aggravated.

Disclosure of Invention

The first aspect of the present disclosure provides a compressor housing having a receiving chamber for passage of a gas working medium, the compressor housing comprising:

a shell wall body having at least one sound-deadening chamber disposed therein; and

the partition wall is connected with the shell wall main body and is configured to partition the accommodating chamber and the corresponding sound-deadening chamber, the partition wall is provided with at least one communication hole which is communicated with the accommodating chamber and the corresponding sound-deadening chamber, and the communication hole is configured to allow gas in the accommodating chamber to enter and exit the corresponding sound-deadening chamber.

In some embodiments, the communicating holes have a diameter of 3mm to 6mm.

In some embodiments, the partition wall is further provided with at least one oil discharge port located below the communication hole and configured to discharge oil in the corresponding sound attenuation chamber.

In some embodiments, the diameter of the oil outlet is 5mm to 6mm.

In some embodiments, the partition wall is integrally formed with or removably attached to the housing wall body.

In some embodiments, the accommodating chamber comprises a discharge chamber for discharging air from the compressor, and a chamber wall of the discharge chamber comprises the partition wall and the corresponding sound-deadening chamber.

In some embodiments, the compressor housing includes a block for receiving a compression section and a discharge end bearing housing connected to the block, the discharge cavity being located within the discharge end bearing housing, wherein the at least one muffling cavity includes at least one block muffling cavity located on the block and/or at least one bearing housing muffling cavity located on the discharge end bearing housing.

In some embodiments, the exhaust end bearing housing includes an axial end wall and a radial side wall connected to the axial end wall, and the at least one housing sound attenuation chamber includes at least one end wall sound attenuation chamber located on the axial end wall and/or at least one side wall sound attenuation chamber located on the radial side wall.

A second aspect of the present disclosure provides a screw compressor including the compressor housing of the first aspect of the present disclosure and a screw compression portion disposed in the accommodation chamber of the compressor housing.

Based on this compressor housing and compressor that openly provide, embedded amortization chamber in compressor housing's the conch wall main part, form resonance when amortization chamber natural frequency reaches unanimity with the flowing gas working medium noise frequency that holds the intracavity, strengthen the air current vibration in the amortization intracavity, consume the sound energy to reach noise reduction effect.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

fig. 1 is a schematic sectional view of a compressor according to an embodiment of the present disclosure.

Fig. 2 is a schematic perspective view of a compressor body of the embodiment shown in fig. 1.

Fig. 3 is a schematic view showing a structure of a detachable partition wall of the compressor of the embodiment shown in fig. 1.

Fig. 4 is a sectional view schematically illustrating a discharge end bearing housing of the compressor of the embodiment shown in fig. 1.

Fig. 5 is an axial structural view of a part of the structure of the exhaust end bearing housing shown in fig. 4.

Fig. 6 is a side view schematically showing a partial structure of the exhaust end bearing housing shown in fig. 4.

Fig. 7 is a schematic diagram of a helmholtz resonator structure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present disclosure, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present disclosure.

In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are presented only for the convenience of describing and simplifying the disclosure, and in the absence of a contrary indication, these directional terms are not intended to indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the disclosure; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

As shown in fig. 1 to 6, an embodiment of the present disclosure provides a compressor housing and a screw compressor including the compressor housing and a screw compression portion located in a receiving cavity of the housing.

The compressor housing has a receiving space for the passage of a gas medium, comprising a housing wall body and at least one partition wall. At least one sound-deadening chamber is arranged in the shell wall main body. At least one partition wall is arranged corresponding to at least one sound deadening chamber respectively. The partition wall is connected with the shell wall main body and is configured to partition the accommodating cavity and the corresponding sound attenuation cavity, at least one communication hole for communicating the accommodating cavity and the corresponding sound attenuation cavity is formed in the partition wall, and the communication hole is configured to allow gas in the accommodating cavity to enter and exit the corresponding sound attenuation cavity.

The silencing cavity is embedded in the shell wall main body of the compressor shell, when the natural frequency of the silencing cavity is consistent with the noise frequency of the flowing gas working medium in the containing cavity, resonance is formed, the vibration of air flow in the silencing cavity is enhanced, sound energy is consumed, and therefore the noise reduction effect is achieved.

In some embodiments, the partition wall is further provided with at least one oil discharge port, and the oil discharge port is located below the communication hole and configured to discharge oil in the corresponding sound attenuation chamber. This setting does benefit to and maintains the volume of amortization chamber unchangeably, does benefit to and guarantees the noise cancelling effect.

In some embodiments, the dividing wall is integrally formed with or removably connected to the housing wall body.

In some embodiments, the containment chamber comprises a discharge chamber for discharge of the compressor, the wall of the discharge chamber comprising a partition wall and a corresponding sound-deadening chamber.

Because the exhaust pressure is high, the problem of over-compression or under-compression exists at the exhaust end pressure, and the problem of noise caused by airflow pulsation in the exhaust cavity is particularly serious. The wall of the exhaust cavity is provided with the silencing cavity, which is beneficial to reducing the airflow pulsation noise generated by the periodic exhaust of the compressor and effectively reducing the noise of the exhaust position.

In some embodiments, as shown in fig. 1 to 6, the compressor housing includes a machine body 1 for accommodating a compression part and a discharge end bearing housing 3 connected to the machine body 1, and a discharge chamber 31 is located in the discharge end bearing housing 3. Wherein the at least one muffling chamber comprises at least one engine block muffling chamber 11 located on the engine block 1 and/or at least one bearing block muffling chamber located on the exhaust end bearing block 3.

In some embodiments, as shown in fig. 1, 4-6, the discharge end bearing housing 3 includes an axial end wall and a radial side wall connected to the axial end wall, and the at least one housing sound-deadening chamber includes at least one end wall sound-deadening chamber 33 located on the axial end wall and/or at least one side wall sound-deadening chamber 34 located on the radial side wall.

The compressor of the embodiment of the disclosure comprises the compressor shell of the embodiment of the disclosure and a compression part arranged in a containing cavity of the compressor shell. The compressor of the disclosed embodiment has the same advantages as the compressor housing of the disclosed embodiment.

The compression section includes, for example, a screw compression section. After the compressor comprising the screw compression part adopts the compressor shell of the embodiment of the disclosure, the airflow pulsation noise of the screw compressor is favorably reduced. The silencing cavity is arranged in the cavity wall of the exhaust cavity, so that the reduction of airflow pulsation noise generated by periodic exhaust of the screw compressor is facilitated. For the simplified semi-closed screw compressor, the built-in oil content and the oil storage cylinder are removed, the secondary wrapping of an oil content barrel is avoided, the exhaust noise is transmitted outwards, the compressor shell adopts the compressor shell of the embodiment, the exhaust noise is effectively reduced, and therefore the problem of high noise of the exhaust position of the simplified screw compressor without an oil content structure in the current market is solved.

The compressor housing and the screw compressor having the same according to some embodiments of the present disclosure will be described in more detail with reference to fig. 1 to 7.

As shown in fig. 1, the screw compressor includes a compressor housing and a screw compression portion 2 located in a receiving chamber of the compressor housing. The compressor housing includes a machine body 1 for accommodating a compression part and a discharge end bearing housing 3 connected to the machine body 1. The discharge end bearing block 3 has a discharge chamber 31 therein, and high-pressure gas output from the screw compression section 2 enters the discharge chamber 31 and is discharged from a discharge port 32 in the compressor housing. The exhaust port 32 is provided on the exhaust end bearing housing 3.

As shown in fig. 1 to 6, the compressor housing includes a plurality of muffling chambers. The plurality of muffling chambers include a plurality of engine block muffling chambers 11 located on the engine block 1 and a plurality of bearing block muffling chambers located on the exhaust end bearing block 3.

As shown in fig. 1 and 2, in some embodiments, three body muffling cavities 11 are provided on the body 1. Three are arranged side by side on the shell wall main body on the machine body 1 below the screw compression part 2. As shown in fig. 1 and 3, the housing 1 further includes a cover plate 12 mounted on the main body of the housing wall, and the cover plate 12 covers the three housing silencing chambers 11 simultaneously, so that three partition walls are disposed on the cover plate 12, and the three partition walls are disposed corresponding to the three housing silencing chambers 11 respectively. That is, the partition wall provided corresponding to the body sound-deadening chamber 11 is a partition wall detachably connected to the housing wall main body.

As shown in fig. 3, the cover plate 12 is provided with a connection hole 121, and a screw can be screwed on the wall body of the machine body 1 through the connection hole 121 to fix the cover plate 12 on the machine body 1. The cover plate 12 is further provided with a communication hole 122 and an oil discharge hole 123. The three partition walls of the cover plate 12 each include a set of communication holes 122 (three in each set) and an oil discharge port 123. Thus, each of the three body noise-deadening chambers 11 is provided with a partition wall and the communication hole 122 and the oil discharge port 123 on the partition wall correspondingly. The communicating hole 122 is used for gas working medium in the exhaust cavity 31 to enter and exit the engine body silencing cavity 11, and the oil outlet 123 is used for discharging oil liquid in the engine body silencing cavity 11. The diameter of the communication hole 122 is, for example, 3 to 6mm. The diameter of the oil outlet 123 is, for example, 5 to 6mm.

As shown in fig. 1, 4 to 6, the discharge end bearing housing 3 includes an axial end wall and a radial side wall connected to the axial end wall, and the plurality of housing sound-deadening chambers include a plurality of end wall sound-deadening chambers 33 on the axial end wall and a plurality of side wall sound-deadening chambers 34 on the radial side wall.

End wall sound-deadening chambers 33 and side wall sound-deadening chambers 34 are provided in the casing wall main body on the discharge end bearing housing 3, with partition walls 35 being provided between them and the discharge chamber 31, respectively. Wherein each partition wall 35 is formed integrally with the wall body of the discharge-end bearing housing 33. Each partition wall 35 is provided with a set of communication holes 351 (three in each set) and one oil drain 352. The communication hole 351 is used for enabling gas working media in the exhaust cavity 31 to enter and exit the bearing seat silencing cavity, and the oil discharge hole 352 is used for discharging oil in the bearing seat silencing cavity. The diameter of the communication hole 351 is, for example, 3 to 6mm. The diameter of the oil drain 352 is, for example, 5 to 6mm.

Fig. 7 shows a schematic diagram of the structure of a helmholtz resonator. The principle of noise reduction and noise reduction of the compressor housing with the sound-absorbing chamber will be described with reference to fig. 7.

The helmholtz resonator is composed of a vessel with a volume V and a short tube with a diameter d, the gas column in the short tube generates strong vibrations when the frequency of the incident sound waves approaches the natural frequency of the gas column in the resonator, and during the vibrations, the sound energy is dissipated by overcoming the frictional resistance.

As shown in fig. 1, the screw compressor is a simplified screw compressor without an oil separation structure, and a gas working medium is compressed by a compression cavity formed by a screw compression part 2 and a machine body 1, then discharged into a discharge cavity 31, and then directly discharged from a discharge port 32. In the discharge position of the screw compressor, the periodic connection and disconnection between the compression chamber and the discharge chamber 31 causes the discharge position to generate high-pressure air flow pulsation, thereby generating large air flow noise. For the oil-free sub-barrel of the simplified screw compressor, the bearing seat 3 at the exhaust end is wrapped outside, so that the exhaust noise is larger.

In the foregoing embodiment, in order to reduce noise at the discharge position, a sound-deadening chamber is fitted into the compressor housing, and the container and short pipe structure of the helmholtz resonator are fitted into the housing 1 and the discharge end bearing housing 3 at positions corresponding to the discharge chamber 31 by utilizing the principle of the helmholtz resonator. A cover plate 12 is attached to an end surface of the body sound-deadening chamber 11 facing the exhaust chamber 31. The cover plate 12 is provided with a communicating hole 122 for the gas working medium in the exhaust cavity 31 to enter and exit the body silencing cavity 11. The communication hole 122 serves as a short tube structure of the helmholtz resonator. In order to prevent the engine body silencing cavities 11 from storing oil, oil outlets 123 are respectively arranged at the corresponding positions of the lowest point of the bottom of each engine body silencing cavity 11 on the cover plate 12. The oil discharge port 123 can prevent the oil stored in the body sound-deadening chamber 11 from influencing the volume of the sound-deadening chamber. A plurality of end wall sound-deadening chambers 33 and side wall sound-deadening chambers 34 are provided around the air discharge chamber 31 on the air discharge end bearing housing 3, and a communication hole 351 and an oil discharge port 352 are provided in the partition plate 35 of each bearing housing sound-deadening chamber. The communication hole 351 functions similarly to the communication hole 122, and the drain hole 352 functions similarly to the drain hole 123.

The volume sizes of the multiple sound-absorbing cavities on the shell of the compressor can be consistent to strengthen noise reduction and noise elimination of the same frequency, and the volume sizes of the multiple sound-absorbing cavities can also be inconsistent to reduce noise and eliminate noise aiming at different frequencies.

In addition, the noise elimination model of the noise elimination structure can be changed by changing the size and/or the number of the communication holes on the cover plate 12 or the partition wall 35, and the noise reduction effect can be enhanced by calculation assistance and experimental test effects.

The shape of the sound-deadening cavity is not limited, and the sound-deadening cavity can be, for example, a rectangular parallelepiped, a cylinder, a cone, a polyhedron, or the like.

According to the above description, the compressor housing and the screw compressor of the embodiments of the present disclosure utilize the helmholtz resonance principle, and the silencing structure including the silencing cavity and the communication hole is embedded in the compressor housing, so that resonance is formed when the natural frequency of the silencing structure is consistent with the exhaust airflow noise frequency, thereby enhancing the airflow vibration in the silencing cavity, consuming sound energy, and achieving the noise reduction effect.

When the screw compressor is a simple semi-closed screw compressor, the problem of high airflow pulsation noise generated by periodic exhaust of the screw compressor can be solved.

Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the embodiments of the disclosure or equivalent replacements of parts of the technical features may be made, which are all covered by the technical solution claimed by the disclosure.

Claims

1. A compressor housing having a receiving chamber for the passage of a gaseous working medium, said compressor housing comprising:

2. The compressor housing according to claim 1, wherein a diameter of the communication hole is 3mm to 6mm.

3. The compressor housing as claimed in claim 1, wherein the partition wall is further provided with at least one oil discharge port located below the communication hole and configured to discharge oil in the corresponding sound-deadening chamber.

4. The compressor housing of claim 3 wherein the oil discharge port has a diameter of 5mm to 6mm.

5. The compressor housing of claim 1, wherein the dividing wall is integrally formed with or removably connected to the casing wall body.

6. The compressor housing according to any one of claims 1 to 5, wherein the accommodation chamber comprises a discharge chamber for compressor discharge, a chamber wall of the discharge chamber comprising the partition wall and the corresponding sound-deadening chamber.

7. Compressor housing according to claim 6, characterized in that it comprises a machine body (1) for accommodating a compression section and a discharge end bearing seat (3) connected to the machine body (1), the discharge cavity (31) being located in the discharge end bearing seat (3), wherein the at least one muffling cavity comprises at least one machine body muffling cavity (11) located on the machine body (1) and/or at least one bearing seat muffling cavity located on the discharge end bearing seat (3).

8. Compressor housing according to claim 7, wherein the discharge end bearing housing (3) comprises an axial end wall and a radial side wall connected to the axial end wall, the at least one bearing housing sound-deadening chamber comprising at least one end wall sound-deadening chamber (33) located on the axial end wall and/or at least one side wall sound-deadening chamber (34) located on the radial side wall.

9. Screw compressor, characterized by comprising a compressor housing according to any one of claims 1 to 8 and a screw compression portion disposed in the receiving cavity of the compressor housing.