Compressor oil separation structure and screw compressor

Abstract

A compressor oil separation structure and a screw compressor. The compressor oil separation structure comprises: an oil separation barrel body (10), having a separation cavity (S); an exhaust pipe (20), extending into the separation cavity (S) and used to discharge an oil-gas mixture into the separation cavity (S); and a buffer structure (30), disposed in the separation cavity (S) and having at least one buffer chamber (31), the at least one buffer chamber (31) being in communication with the separation cavity (S). A part of a high-pressure pulsation oil-gas mixture fluid discharged into the separation cavity (S) from the exhaust pipe (20) can enter the buffer chamber (31), and part of an acoustic wave brought by the oil-gas mixture that is consistent with the resonance frequency of the buffer chamber (31) can be converted into heat energy by the buffer chamber (31), so that the compressor oil separation structure reduces exhaust noise while implementing oil separation.

Description

Compressor oil separation structure and screw compressor

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the application with CN application number 202311570193.X and application date November 23, 2023, and claims its priority. The disclosed content of the CN application is hereby introduced as a whole into this application. Technical Field

[0003] The present disclosure relates to the field of compressors, and in particular to a compressor oil separation structure and a screw compressor. Background Art

[0004] Oil-injected screw compressors use lubricating oil to lubricate and cool the support bearings during operation. The oil also acts as a seal for leakage between the male and female rotors. Because lubricating oil is miscible with the compressed working fluid, an oil separator is typically installed before the compressed working fluid exits the compressor to initially separate the miscible lubricating oil and working fluid, ensuring the reliability of the compressor's oil circulation.

[0005] Summary of the Invention

[0006] After research, the inventor found that during the operation of the screw compressor in the related technology, the compression chamber and the suction and exhaust chamber are periodically connected, resulting in unstable gas flow, causing air flow pulsation in the suction and exhaust chambers, and leading to vibration noise in the suction and exhaust chambers. Considering that the exhaust high pressure and the exhaust end pressure are over-compressed or under-compressed, the air flow pulsation in the exhaust chamber will induce more serious noise problems.

[0007] In view of this, embodiments of the present disclosure provide a compressor oil separation structure and a screw compressor, which can improve the exhaust noise problem.

[0008] In one aspect of the present disclosure, a compressor oil separation structure is provided, comprising:

[0009] The oil separator barrel has a separation chamber;

[0010] an exhaust pipe extending into the separation chamber and used for discharging the oil-gas mixture into the separation chamber;

[0011] A buffer structure is provided in the separation chamber and has at least one buffer chamber.

[0012] Wherein, the at least one buffer chamber is communicated with the separation chamber.

[0013] In some embodiments, the resonance frequency of the at least one buffer chamber is configured to be the same as a partial vibration frequency of the sound waves of the oil-air mixture discharged from the exhaust pipe into the separation chamber.

[0014] In some embodiments, the at least one buffer chamber includes a plurality of buffer chambers, and the plurality of buffer chambers are all in communication with the separation chamber.

[0015] In some embodiments, at least two of the plurality of buffer chambers have different volumes.

[0016] In some embodiments, the buffer structure comprises:

[0017] a partition member, disposed on the inner wall of the separation chamber, and separating the inner wall of the separation chamber into a plurality of grids that are not connected to each other; and

[0018] The orifice plate is arranged on the partition member and encloses the multiple buffer chambers together with the multiple grids and the inner wall of the separation chamber. The orifice plate has through holes connecting the separation chamber with each buffer chamber.

[0019] In some embodiments, the orifice plate has multiple through-hole groups, each through-hole group includes at least one through-hole arranged on the surface of the orifice plate, the multiple through-hole groups correspond to the multiple buffer chambers respectively, and each buffer chamber is connected to the separation chamber through the corresponding through-hole group.

[0020] In some embodiments, the through-hole groups corresponding to at least two buffer chambers with different volumes have different numbers of through-holes and / or different through-hole cross-sectional areas.

[0021] In some embodiments, the plurality of grids include at least two circles of grids arranged radially, and each circle of grids includes at least one grid arranged circumferentially.

[0022] In some embodiments, the partition member includes a plurality of concentric annular partitions and a plurality of radial partitions cross-connected to the plurality of concentric annular partitions, the plurality of concentric annular partitions and the plurality of radial partitions respectively surround at least two circles of radially arranged grids, and the volume of each grid in each circle of grids gradually decreases from the outside to the inside along the radial direction of the plurality of concentric annular partitions.

[0023] In some embodiments, the orifice plate is detachably disposed on the partition member.

[0024] In some embodiments, the partition member is detachably disposed on or formed on the inner wall of the separation chamber.

[0025] In some embodiments, the oil separator barrel has a barrel body and a barrel bottom, the barrel bottom is detachably arranged on the barrel body, and the buffer structure is arranged on the inner wall of the barrel bottom.

[0026] In some embodiments, the compressor oil separation structure further comprises:

[0027] The oil filter is arranged in the barrel body and surrounds the separation cavity with the inner wall of the barrel bottom.

[0028] In some embodiments, the exhaust pipe includes a first exhaust pipe and a second exhaust pipe, the first exhaust pipe extends into the separation chamber and has a first exhaust end, the second exhaust pipe extends into the separation chamber and has a second exhaust end.

[0029] In some embodiments, a port sidewall of at least one of the first exhaust end and the second exhaust end has a plurality of exhaust holes arranged circumferentially.

[0030] In some embodiments, the compressor oil separation structure further comprises:

[0031] An oil separator filter is disposed in the oil separator barrel and surrounds the separation chamber together with a portion of the inner wall of the oil separator barrel;

[0032] The first exhaust pipe and the second exhaust pipe pass through the oil filter respectively, and the first exhaust end and the second exhaust end are both inclined toward the axis of the oil filter.

[0033] In one aspect of the present disclosure, a screw compressor is provided, comprising: the aforementioned compressor oil separation structure.

[0034] Therefore, according to the disclosed embodiment, a buffer structure is provided in the separation chamber of the oil separator barrel, and the buffer structure has at least one buffer chamber connected to the separation chamber. This allows a portion of the high-pressure, pulsating oil-gas mixture discharged from the exhaust pipe into the separation chamber to enter the buffer chamber. The portion of the sound waves generated by the oil-gas mixture that coincides with the resonant frequency of the buffer chamber can be converted into heat energy by the buffer chamber, thereby enabling the compressor oil separator structure to achieve its oil separation function while reducing exhaust noise. Furthermore, the buffer structure can enhance the oil-gas separation effect of the oil-gas mixture through the buffer chamber, thereby improving separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0036] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0037] FIG1 is a partial cross-sectional view of the installation structure of some embodiments of the compressor oil separation structure according to the present disclosure;

[0038] FIG2 is a schematic diagram of an exhaust pipe and a buffer structure in a separation cavity according to some embodiments of the compressor oil separation structure disclosed herein;

[0039] FIG3 is a schematic diagram of the installation of an oil separator barrel with a buffer structure installed in some embodiments of the compressor oil separator structure according to the present disclosure;

[0040] FIG4 is an exploded schematic diagram of the embodiment shown in FIG3 .

[0041] It should be understood that the size of each part shown in the drawings is not drawn according to the actual proportional relationship.In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0042] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure, its application, or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions, and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0043] The terms "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The terms "include" or "comprises" and similar terms mean that the elements before the term include the elements listed after the term, and do not exclude the possibility of also including other elements. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] In the present disclosure, when a specific device is described as being located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a specific device is described as being connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be not directly connected to the other device but with an intervening device.

[0045] All terms (including technical or scientific terms) used in this disclosure have the same meaning as those understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined herein.

[0046] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0047] In some related technologies, screw compressors employ an oil separation mechanism to initially separate the miscible lubricating oil and working fluid within the compressor before the compressed working fluid is discharged, ensuring the reliability of the compressor's oil circulation. However, during operation, the compression chamber and the suction and discharge chambers periodically connect, causing unstable gas flow and pulsating airflow within the suction and discharge chambers, leading to vibration and noise in the suction and discharge chambers. Furthermore, given the potential for over-compression or under-compression at the exhaust high pressure and final exhaust pressure, pulsating airflow within the discharge chamber can lead to even more severe noise issues.

[0048] In view of this, embodiments of the present disclosure provide a compressor oil separation structure and a screw compressor, which can improve the exhaust noise problem.

[0049] Figure 1 is a partial cross-sectional view of the installation structure of some embodiments of the compressor oil separation structure according to the present disclosure. Figure 2 is a schematic diagram of the exhaust pipe and the buffer structure in the separation chamber according to some embodiments of the compressor oil separation structure according to the present disclosure.

[0050] With reference to Figures 1 and 2, an embodiment of the present disclosure provides a compressor oil separation structure, comprising: an oil separation barrel 10, an exhaust pipe 20, and a buffer structure 30. The oil separation barrel 10 has a separation chamber S. The exhaust pipe 20 extends into the separation chamber S and is used to discharge the oil-air mixture into the separation chamber S. The buffer structure 30 is disposed within the separation chamber S and has at least one buffer chamber 31. The at least one buffer chamber 31 is in communication with the separation chamber S.

[0051] In this embodiment, a buffer structure 30 is provided in the separation chamber S of the oil separator barrel 10, and the buffer structure 30 has at least one buffer chamber 31 connected to the separation chamber S. This allows a portion of the high-pressure, pulsating oil-gas mixture discharged from the exhaust pipe 20 into the separation chamber S to enter the buffer chamber 31. The portion of the sound waves generated by the oil-gas mixture that coincides with the resonant frequency of the buffer chamber 31 can be converted into heat energy by the buffer chamber 31, thereby enabling the compressor oil separator structure to achieve its oil separation function while reducing exhaust noise. Furthermore, the buffer structure 30 can enhance the oil-gas separation effect of the oil-gas mixture through the buffer chamber 31, thereby improving separation efficiency.

[0052] The oil separator barrel 10 can be connected to the compressor body in a screw compressor. An exhaust connector can be provided on the oil separator barrel 10 to receive the high-pressure oil-gas mixture compressed by the compressor body. An exhaust pipe 20 can be connected to the exhaust connector to discharge the oil-gas mixture from the exhaust connector into a separation chamber S. Within the separation chamber S, the oil-gas mixture is separated. This oil-gas mixture can include a mixture of lubricating oil and gaseous refrigerant. The separated lubricating oil can be returned to the compressor body for lubrication.

[0053] The buffer structure 30 can be arranged in the separation chamber S in various forms, such as installing a fixed buffer structure 30 on the inner wall surface of the separation chamber S, or setting up the buffer structure 30 on the inner wall of the separation chamber S through a bracket, or forming the buffer structure 30 integrally on the inner wall of the separation chamber S, etc.

[0054] The buffer chamber 31 has a certain volume and is connected to the separation chamber S, so that the oil-gas mixture can enter the buffer chamber 31 from the separation chamber S, and can also enter the separation chamber S from the buffer chamber 31. The buffer structure 30 may include a single buffer chamber 31 or multiple buffer chambers 31. The buffer chamber 31 can be configured in various shapes and sizes as needed.

[0055] In some embodiments, the resonance frequency of the at least one buffer chamber 31 is configured to be the same as a partial vibration frequency of the sound waves of the oil-air mixture discharged into the separation chamber S by the exhaust pipe 20 .

[0056] For the buffer chamber 31 of a specific structure and size, when the resonance frequency achieved is the same as the partial vibration frequency of the sound waves of the oil-gas mixture discharged from the exhaust pipe 20 into the separation chamber S, it can achieve targeted noise reduction for the sound waves of these frequencies and convert the sound energy into heat energy.

[0057] For the embodiment in which the buffer structure 30 has multiple buffer chambers 31, the multiple buffer chambers 31 can all be connected to the separation chamber S. The buffer structure 30 uses multiple buffer chambers 31 to achieve more resonance frequencies, so that more frequency parts of the sound waves brought by the oil-gas mixture can be converted into heat energy by the multiple buffer chambers 31, further reducing the exhaust noise. Designers can determine some major sound wave frequencies based on the collection of exhaust noise, and then specifically set up multiple buffer chambers that can achieve corresponding resonance frequencies, so that the exhaust noise can be more suppressed and the noise reduction effect is improved. In addition, the multiple buffer chambers 31 connected to the separation chamber S can also achieve auxiliary oil and gas separation for the received oil and gas mixture, thereby improving the oil and gas separation efficiency of the compressor oil separation structure.

[0058] In some embodiments, at least two of the multiple buffer chambers 31 have different volumes. This can include embodiments in which each buffer chamber 31 has a different volume from the other buffer chambers 31, or embodiments in which some buffer chambers 31 have the same volume but a different volume from another portion of the buffer chambers 31. Considering that the volume of a buffer chamber 31 is related to the resonant frequency achieved by the buffer chamber 31, having at least two of the multiple buffer chambers 31 have different volumes can achieve multiple resonant frequencies. In this way, the multiple chambers 31 can convert the sound waves of the oil-gas mixture discharged from the exhaust pipe 20 into the separation chamber S with the same vibration frequency into heat energy, thereby improving the noise reduction effect.

[0059] Figure 3 is a schematic diagram of the installation of an oil separator barrel with a buffer structure installed in some embodiments of the compressor oil separator structure according to the present disclosure. Figure 4 is an exploded schematic diagram of the embodiment shown in Figure 3.

[0060] 3 and 4 , in some embodiments, the buffer structure 30 includes a partition member 32 and a perforated plate 33. The partition member 32 is disposed on the inner wall of the separation chamber S and separates the inner wall of the separation chamber S into a plurality of interconnected grids 321. The perforated plate 33 is disposed on the partition member 32 and, together with the plurality of grids 321 and the inner wall of the separation chamber S, encloses the plurality of buffer chambers 31. The perforated plate 33 has through holes 331 that connect the separation chamber S with each buffer chamber 31.

[0061] When the oil-gas mixture reaches the orifice plate 33, it disperses the oil-gas mixture discharged from the exhaust pipe 20, thereby improving oil separation efficiency. The partition member 32 can include multiple intersecting partitions, such as flat plates, arc-shaped plates, or cylindrical plates. The grid 321 is enclosed by the intersecting partitions. For example, in Figure 4, three concentric cylindrical partitions intersect with multiple flat plate partitions radiating outward from the center to form multiple grids 321. Each grid is isolated from the others by the isolation of the partitions.

[0062] The orifice plate 33 is disposed on the partition member 32 and, together with the multiple grids 321 and the inner wall of the separation chamber S, encloses the multiple buffer chambers 31. In this case, the two opposing surfaces of the buffer chamber are the inner surface of the orifice plate 33 and the inner wall surface of the separation chamber S, respectively. The grids 321, together with the inner surface of the orifice plate 33 (the side adjacent to the partition member 32) and the inner wall surface of the separation chamber S, enclose the buffer chamber 31.

[0063] The orifice plate 33 has through-holes 331 for connecting the separation chamber S with each buffer chamber 31. The oil-gas mixture that reaches the outer surface of the orifice plate 33 (the side facing away from the partition member 32) is partially dispersed by the orifice plate 33, while another portion enters the buffer chamber 31 through the through-holes 331. The sound waves that enter along with the oil-gas mixture resonate with the gas within each buffer chamber, converting the sound energy into heat and being absorbed, thereby reducing the pulsation noise of the exhaust gas flow. The noise-reduced exhaust gas then flows out through the through-holes 331 in the orifice plate 33 and enters the separation chamber S.

[0064] Referring to Figure 4, in some embodiments, the orifice plate 33 has a plurality of through hole groups 331G, each through hole group 331G includes at least one through hole 331 arranged on the surface of the orifice plate 33, and the plurality of through hole groups 331G respectively correspond to the plurality of buffer chambers 31, and each buffer chamber 31 is connected to the separation chamber S through the corresponding through hole group 331G.

[0065] In Figure 4 , through-hole groups 331G correspond one-to-one with buffer chambers 31, i.e., each buffer chamber 31 corresponds to a through-hole group 331G. Each through-hole group 331 may include multiple through-holes 331, which are arranged on the surface of the orifice plate 33. In other embodiments, some or all through-hole groups 331 may include only one through-hole 331.

[0066] Through hole group 331G allows the oil-gas mixture to flow between the corresponding buffer chamber 31 and separation chamber S, achieving noise reduction and oil-gas separation. Furthermore, designers can customize the number, size, and distribution of the through holes in through hole group 331G to meet the needs of different application scenarios.

[0067] Referring to Figure 4 , in some embodiments, at least two buffer chambers 31 of different volumes each correspond to a through-hole group 331G having a different number of through-holes and / or a different through-hole cross-sectional area. By using through-hole groups 331G with different numbers of through-holes and / or cross-sectional areas for buffer chambers 31 of different volumes, the desired resonant frequency can be achieved to the greatest extent possible, further enhancing the noise reduction effect.

[0068] The through holes 331 included in each through hole group 331G can have the same cross-sectional area. However, depending on the location and size of the buffer chamber 31, through hole groups 331G with different numbers of through holes can be provided. For example, in FIG4 , through hole groups 331G closer to the center have fewer through holes, while through hole groups 331G farther from the center have more through holes. Alternatively, the through hole groups 331G can have the same number of through holes 331, but with different cross-sectional areas.

[0069] In some embodiments, the plurality of grids 321 may include at least two radially arranged circles of grids 321, each circle of grids 321 including at least one circumferentially arranged grid 321. As described above, the partition members 32 are used to divide the grids 321 radially and circumferentially. For example, in FIG4 , the plurality of grids 321 include three radially arranged circles of grids 321, wherein the grid 321 closest to the center includes one grid 321, while the two circles of grids 321 farther from the center each include eight grids 321.

[0070] Referring to FIG4 , in some embodiments, the baffle member 32 includes a plurality of concentric annular baffles 32a and a plurality of radial baffles 32b cross-connected to the plurality of concentric annular baffles 32a. The plurality of concentric annular baffles 32a and the plurality of radial baffles 32b respectively enclose at least two radially arranged circles of grids 321. The volume of each grid 321 in each circle of grids 321 gradually decreases from the outside to the inside along the radial direction of the plurality of concentric annular baffles. The plurality of concentric annular baffles 32a and the plurality of radial baffles 32b can be integrally formed and can also be integrally formed with or mounted on the oil separator barrel 10.

[0071] By cross-linking multiple concentric annular baffles and multiple radial baffles, a grid volume is created that gradually decreases radially from the outside to the inside. This not only facilitates structural formation but also enhances noise reduction by increasing resonant frequencies. Furthermore, this structure also improves oil and gas separation.

[0072] For the orifice plate 33, its through holes 331 can be arranged according to the distribution of the grid 321 to meet the need for communication between the buffer chamber 31 and the separation chamber S. Moreover, this grid distribution is relatively uniform, which can achieve flow balancing and enhance the separation of the oil-gas mixture.

[0073] For the compressor oil separation structure, the orifice plate 33 can be replaced and repaired as needed, or it can be replaced to adapt to the application environment. Therefore, in some embodiments, the orifice plate 33 is detachably mounted on the partition member 32. For example, in Figures 3 and 4, the orifice plate 33 is provided with a plurality of first mounting holes 332, and the partition member 32 also has a plurality of second mounting holes 322. When the orifice plate 33 is positioned on the partition member 32, the plurality of first mounting holes 332 are aligned one by one with the plurality of second mounting holes 322, and the connecting members (such as screws) are passed through the first mounting holes 332 and fixed in the second mounting holes 322.

[0074] 1 and 4 , in some embodiments, the partition member 32 is detachably disposed on or formed on the inner wall of the separation chamber S. The partition member 32 can form multiple grids 321. To meet the requirements for denoising exhaust sound waves of different frequencies, the partition member 32 can be replaced with a different grid pattern. The grid pattern here may include the shape, size, and positional relationship of the grid.

[0075] With reference to FIG1 , in some embodiments, the oil separator barrel 10 comprises a barrel body 11 and a barrel bottom 12, wherein the barrel bottom 12 is detachably mounted on the barrel body 11, and the buffer structure 30 is disposed on the inner wall of the barrel bottom 12. Compared to some related oil separator barrels, in which the barrel bottom and barrel body are integrally formed and cannot be separated, in this embodiment, the buffer structure 30 is disposed on the inner wall of the barrel bottom 12, and the barrel bottom 12 is detachably mounted on the barrel body 11. In this way, the barrel bottom of the oil separator barrel 10 can be replaced according to various forms of the barrel bottom 12 provided with the buffer structure 30 (e.g., having multiple buffer chambers 31 corresponding to different resonant frequencies), so as to address the exhaust noise problems of different frequencies generated in different application scenarios.

[0076] 1 , in some embodiments, the compressor oil separation structure further includes an oil filter 40. The oil filter 40 is disposed in the barrel body 11 and encloses the separation chamber S with the inner wall of the barrel bottom 12.

[0077] In this embodiment, after the oil-gas mixture discharged from the exhaust pipe enters the separation chamber, it collides with the inner wall of the separation chamber and the surface of the orifice plate 33 to achieve preliminary separation of the oil-gas mixture. A part of the oil-gas mixture can be separated from the oil by the oil filter (which may also include a flow equalizing plate located between the oil filter and the orifice plate), and the separated gas is discharged from the compressor, and the other part enters each buffer chamber 31 through the orifice plate 33 to achieve noise reduction and oil-gas separation, thereby effectively improving the oil-gas separation effect. The separated lubricating oil flows out from the bottom of the oil separator barrel 10 under the action of gravity.

[0078] 1 and 2 , in some embodiments, the exhaust pipe 20 includes a first exhaust pipe 21 and a second exhaust pipe 22 . The first exhaust pipe 21 extends into the separation chamber S and has a first exhaust end 211 . The second exhaust pipe 22 extends into the separation chamber S and has a second exhaust end 221 .

[0079] The number of the first exhaust pipe 21 and the second exhaust pipe 22 can be one or more. Depending on the structural layout and airflow pressure loss requirements, in some embodiments, the number of the first exhaust pipe 21 and the second exhaust pipe 22 is one to make the structure more compact and reduce airflow pressure loss.

[0080] The exhaust pipe 20 can be set to a one-to-two structure, that is, the exhaust joint of the compressor is split into two paths before extending into the separation chamber S through the exhaust pipe, namely the first exhaust pipe 21 and the second exhaust pipe 22, so that the oil-gas mixture can be discharged from the first exhaust end 211 and the second exhaust end 221 through the first exhaust pipe 21 and the second exhaust pipe 22 respectively, which can enhance the collision of the oil-gas mixture with the pipe wall and improve the oil-gas separation effect.

[0081] Referring to Figure 1, in some embodiments, a plurality of exhaust holes 23 are circumferentially arranged on the port sidewall of at least one of the first exhaust end 211 and the second exhaust end 221. The port sidewalls of the first exhaust end 211 and the second exhaust end 221 correspond to the tail portions of the first exhaust pipe 21 and the second exhaust pipe 22. The provision of the plurality of circumferentially arranged exhaust holes 23 on the port sidewalls further enhances the uniform flow of the oil-gas mixture and improves the oil-gas separation effect.

[0082] For the compressor oil separation structure embodiment further including an oil filter 40, the oil filter 40 is disposed within the oil separator barrel 10 and, together with a portion of the inner wall of the oil separator barrel 10, encloses the separation chamber S. The first exhaust pipe 21 and the second exhaust pipe 22 respectively pass through the oil filter 40, and the first exhaust end 211 and the second exhaust end 221 are both inclined toward the axis of the oil filter 40.

[0083] There is a certain angle between the first exhaust end 211 and the second exhaust end 221 , both of which are inclined toward the axis of the oil filter 40 , which helps to make the two exhaust ends more evenly distributed on the cross section of the oil separator barrel, enhance the utilization of the cross-sectional area, and thus further enhance the oil separation efficiency.

[0084] The above compressor oil separation structure can be applied to a screw compressor and can reduce the exhaust noise during operation of the screw compressor. Therefore, in one aspect of the present disclosure, a screw compressor is provided, comprising the compressor oil separation structure of any of the above embodiments.

[0085] Thus far, various embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0086] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A compressor oil separation structure, comprising: The oil separation barrel (10) has a separation chamber (S); an exhaust pipe (20), extending into the separation chamber (S) and used for discharging the oil-gas mixture into the separation chamber (S); and A buffer structure (30) is arranged in the separation chamber (S) and has at least one buffer chamber (31). Wherein, the at least one buffer chamber (31) is communicated with the separation chamber (S).

2. The compressor oil separation structure according to claim 1, wherein: The resonance frequency of the at least one buffer chamber (31) is configured to be the same as a partial vibration frequency of the sound wave of the oil-gas mixture discharged from the exhaust pipe (20) into the separation chamber (S).

3. The compressor oil separation structure according to claim 1 or 2, wherein: The at least one buffer chamber (31) comprises a plurality of buffer chambers (31), and the plurality of buffer chambers (31) are all in communication with the separation chamber (S).

4. The compressor oil separation structure according to claim 3, wherein: At least two of the plurality of buffer chambers (31) have different volumes.

5. The compressor oil separation structure according to any one of claims 1 to 4, wherein: The buffer structure (30) comprises: a partition member (32) disposed on the inner wall of the separation chamber (S) and separating a plurality of grids (321) that are not connected to each other on the inner wall of the separation chamber (S); and The orifice plate (33) is arranged on the partition member (32), and together with the multiple grids (321) and the inner wall of the separation chamber (S), encloses the multiple buffer chambers (31), and the orifice plate (33) has a through hole (331) connecting the separation chamber (S) and each buffer chamber (31).

6. The compressor oil separation structure according to claim 5, wherein: The orifice plate (33) has a plurality of through hole groups (331G), each through hole group (331G) includes at least one through hole (331) arranged on the surface of the orifice plate (33), the plurality of through hole groups (331G) respectively correspond to the plurality of buffer chambers (31), and each buffer chamber (31) is connected to the separation chamber (S) through the corresponding through hole group (331G).

7. The compressor oil separation structure according to claim 6, wherein: The through hole groups (331G) corresponding to at least two buffer chambers (31) of different volumes respectively contain different numbers of through holes and / or different through hole cross-sectional areas.

8. The compressor oil separation structure according to any one of claims 5 to 7, wherein: The plurality of grids (321) include at least two circles of grids (321) arranged radially, and each circle of grids (321) includes at least one grid (321) arranged along the circumferential direction.

9. The compressor oil separation structure according to claim 8, wherein: The partition member (32) comprises a plurality of concentric annular partitions (32a) and a plurality of radial partitions (32b) cross-connected to the plurality of concentric annular partitions (32a), wherein the plurality of concentric annular partitions (32a) and the plurality of radial partitions (32b) respectively surround at least two circles of grids (321) arranged radially, and the volume of each grid (321) in each circle of grids (321) gradually decreases from outside to inside along the radial direction of the plurality of concentric annular partitions.

10. The compressor oil separation structure according to any one of claims 5 to 9, wherein: The orifice plate (33) is detachably arranged on the partition member (32).

11. The compressor oil separation structure according to any one of claims 5 to 10, wherein: The partition member (32) is detachably arranged on the inner wall of the separation chamber (S) or formed on the inner wall of the separation chamber (S).

12. The compressor oil separation structure according to any one of claims 1 to 11, wherein: The oil separator barrel (10) comprises a barrel body (11) and a barrel bottom (12), wherein the barrel bottom (12) is detachably arranged on the barrel body (11), and the buffer structure (30) is arranged on the inner wall of the barrel bottom (12).

13. The compressor oil separation structure according to claim 12, further comprising: The oil filter (40) is arranged in the barrel body (11) and encloses the separation chamber (S) together with the inner wall of the barrel bottom (12).

14. The compressor oil separation structure according to any one of claims 1 to 13, wherein: The exhaust pipe (20) comprises a first exhaust pipe (21) and a second exhaust pipe (22), wherein the first exhaust pipe (21) extends into the separation chamber (S) and has a first exhaust end (211), and the second exhaust pipe (22) extends into the separation chamber (S) and has a second exhaust end (221).

15. The compressor oil separation structure according to claim 14, wherein: A plurality of exhaust holes (23) are arranged along the circumferential direction on a port side wall of at least one of the first exhaust end (211) and the second exhaust end (221).

16. The compressor oil separation structure according to claim 14 or 15, further comprising: An oil filter (40) is disposed in the oil separator barrel (10) and surrounds the separation chamber (S) together with a portion of the inner wall of the oil separator barrel (10); The first exhaust pipe (21) and the second exhaust pipe (22) respectively pass through the oil filter (40), and the first exhaust end (211) and the second exhaust end (221) are both inclined toward the axis of the oil filter (40).

17. A screw compressor, comprising: The compressor oil separation structure according to any one of claims 1 to 16.

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