Oil-gas separation structure and compressor applying same

Abstract

The oil-gas separation structure is applied to a compressor, the compressor is provided with an exhaust passage, the oil-gas separation structure comprises an oil collecting piece and a separation piece, the oil collecting piece is arranged axially in the exhaust passage, the separation piece is arranged axially in the oil collecting piece and the separation piece can rotate axially relative to the oil collecting piece, a separation oil outlet is arranged on the separation piece and communicates with the oil collecting piece, and the separation oil outlet is used for discharging the separated oil of the separation piece to the oil collecting piece when the separation piece rotates.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to an oil-gas separation structure and a compressor using the same. Background Technology

[0002] A common problem in compressor operation is excessively high oil discharge rate, which can lead to various potential equipment failures. Specifically, when the compressor's oil discharge rate is too high, some lubricating oil is discharged along with the high-temperature, high-pressure refrigerant gas during compression, resulting in residual lubricating oil forming an oil-gas mixture throughout the compressor's refrigeration system. Due to the reduced return oil volume, the amount of lubricating oil inside the compressor becomes insufficient, causing the oil level to drop. Operating the compressor's moving parts without sufficient lubrication will result in excessive wear, further affecting the compressor's power consumption.

[0003] While existing compressor designs consider the lubrication system's requirements, they have not effectively addressed the problems caused by high oil discharge rates, particularly under high loads and continuous operation, where lubricant loss is especially significant. Therefore, a new solution is urgently needed to effectively reduce compressor oil discharge rates and improve the amount of lubricating oil in the compressor. Summary of the Invention

[0004] The purpose of this invention is to provide an oil-gas separation structure and a compressor using the same, aiming to solve the problem of high oil discharge rate in existing compressors.

[0005] To solve the above-mentioned technical problems, the objective of this invention is achieved through the following technical solution: providing an oil-gas separation structure applied to a compressor, wherein the compressor has an exhaust passage, the oil-gas separation structure includes an oil collecting component and a separating component, the oil collecting component being axially disposed within the exhaust passage, the separating component being axially disposed within the oil collecting component and the separating component being axially rotatable relative to the oil collecting component; the separating component is provided with an oil distribution port communicating with the oil collecting component, the oil distribution port being used to discharge the oil separated by the separating component during rotation onto the oil collecting component.

[0006] Furthermore, a gap is provided between the oil collecting component and the separating component, and the oil separating port communicates with the gap.

[0007] Furthermore, the inner wall of the oil collecting component is provided with multiple protrusions.

[0008] Furthermore, the surface of the protrusion is smoothly configured.

[0009] Furthermore, the oil separator is provided in multiple ways, and the multiple oil separators are arranged circumferentially on the separator.

[0010] Furthermore, the oil collecting component has a circumferentially oriented groove, and the separating component has a circumferentially oriented strip; or, the oil collecting component has a circumferentially oriented strip, and the separating component has a circumferentially oriented groove; the oriented strip can rotate along the oriented groove.

[0011] This invention also provides a compressor, including an exhaust passage and an oil-gas separation structure as described above.

[0012] Furthermore, the oil collecting component has an oil drain port, and the compressor has an oil guide groove communicating with the oil drain port. The oil guide groove is located at the bottom of the exhaust channel, and the oil drain port is oriented towards the oil guide groove.

[0013] Furthermore, the compressor has an oil drain hole that communicates with the oil guide groove, and the oil drain hole is connected to the oil supply point of the compressor.

[0014] Furthermore, the exhaust channel includes a first channel and a second channel, the diameter of the first channel is larger than the diameter of the second channel, the first channel and the second channel are connected and a step is formed at the connection, the oil collecting member is disposed in the first channel, and one end of the oil collecting member is located on the step, the oil-gas separation structure also includes a limiting member that covers the other end of the oil collecting member, and one end of the separating member is rotatably connected to the limiting member.

[0015] This invention provides an oil-gas separation structure and a compressor using the same. The oil-gas separation structure is applied to a compressor with an exhaust passage. The oil-gas separation structure includes an oil collecting element and a separating element. The oil collecting element is axially disposed within the exhaust passage, and the separating element is axially disposed within the oil collecting element and can rotate axially relative to the oil collecting element. The separating element has an oil distribution port communicating with the oil collecting element, which discharges the oil separated by the separating element during rotation onto the oil collecting element. By placing the oil-gas separation structure in the exhaust passage, when the oil-gas mixture passes through the oil-gas separation structure at high speed, it spirals inside the separating element, causing the separating element to rotate. The centrifugal force generated during rotation separates the oil and gas mixture, allowing oil droplets to flow back to the compressor, thus significantly reducing the compressor's oil discharge rate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1A schematic diagram of the structure of a compressor provided in an embodiment of the present invention;

[0018] Figure 2 A cross-sectional view of a compressor provided in an embodiment of the present invention. Figure 1 ;

[0019] Figure 3 A cross-sectional view of a compressor provided in an embodiment of the present invention. Figure 2 ;

[0020] Figure 4 for Figure 3 Enlarged view of section A;

[0021] Figure 5 An exploded view of the oil-gas separation structure provided in an embodiment of the present invention;

[0022] Figure 6 This is a cross-sectional view of an oil-gas separation structure provided in an embodiment of the present invention;

[0023] Figure 7 for Figure 6 Enlarged view of section B;

[0024] Figure 8 A cross-sectional view of a compressor provided in an embodiment of the present invention. Figure 3 ;

[0025] Figure 9 for Figure 8 Enlarged view of section C;

[0026] Figure 10 An exploded view of a compressor provided in an embodiment of the present invention.

[0027] Explanation of the markings in the image:

[0028] 10. Oil-gas separation structure; 11. Oil collecting component; 111. Protrusion; 112. Oil drain port; 12. Separator; 121. Oil dividing port; 13. Gap; 14. Limiting groove; 15. Limiting strip; 16. Limiting component;

[0029] 20. Compressor; 21. Exhaust passage; 211. First passage; 212. Second passage; 22. Oil guide groove; 23. Oil drain hole. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0032] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0034] Combination Figures 1 to 5 As shown, this embodiment of the invention provides an oil-gas separation structure 10, applied to a compressor 20. The compressor 20 has an exhaust passage 21. The oil-gas separation structure 10 includes an oil collecting component 11 and a separating component 12. The oil collecting component 11 is axially disposed within the exhaust passage 21, and the separating component 12 is axially disposed within the oil collecting component 11 and can rotate axially relative to the oil collecting component 11. The separating component 12 is provided with an oil dividing port 121 communicating with the oil collecting component 11. The oil dividing port 121 is used to discharge the oil separated by the separating component 12 during rotation onto the oil collecting component 11.

[0035] In this embodiment, the compressor 20 has an exhaust passage 21. The high-temperature, high-pressure gas compressed inside the compressor 20 carries oil droplets, forming an oil-gas mixture that passes through the exhaust passage 21. The oil-gas separation structure 10 includes an oil collecting component 11 and a separating component 12. The oil collecting component 11 is axially installed within the exhaust passage 21, serving to guide the oil and gas. The separating component 12 is located inside the oil collecting component 11 and is designed to rotate axially relative to it. This allows the separating component 12 to separate the oil from the oil-gas mixture through its rotation. The separating component 12 also has an oil separator 121, which communicates with the oil collecting component 11. The main function of the oil separator 121 is to guide the oil separated by centrifugal force to the oil collecting component 11 when the separating component 12 rotates. During compressor operation, the oil-gas separation structure 10 can continuously perform oil-gas separation and oil recovery, thereby reducing the oil discharge rate of the compressor 20 and simultaneously reducing the energy consumption of the compressor 20.

[0036] Specifically, in this embodiment, the inlet of the exhaust channel 21 is located at the compressor cylinder head, and the outlet of the exhaust channel 21 is connected to the exhaust muffler chamber. The high-temperature and high-pressure gas compressed in the compressor cylinder enters the cylinder head through the exhaust port. At this time, the high-temperature and high-pressure gas carries oil droplets, forming an oil-gas mixture. The oil-gas mixture then enters the exhaust channel inlet at the cylinder head from the cylinder head. When the oil-gas mixture enters the exhaust channel 21, the flow area of ​​the oil-gas mixture narrows, which makes the flow speed of the oil-gas mixture faster. The oil-gas mixture is in a vortex flow state when it enters the exhaust channel 21. The oil-gas mixture flows spirally inside the oil-gas separation structure 10, driving the separator 12 to rotate. During the rotation, the oil-gas mixture generates centrifugal force, which throws oil droplets with a density greater than that of gas through the separator 12 toward the oil collecting element 11. The oil droplets are captured after colliding with the oil collecting element 11, thus realizing the recycling of oil droplets. The gas continues to reach the exhaust muffler chamber through the exhaust channel 21 and is discharged through the exhaust pipe, thus realizing oil-gas separation.

[0037] Combination Figure 6 As shown, in one embodiment, a gap 13 is provided between the oil collecting member 11 and the separating member 12, and the oil separating port 121 is connected to the gap 13.

[0038] In this embodiment, a gap 13 is provided between the oil collecting component 11 and the separating component 12, allowing the separated oil droplets to flow into the gap 13 through the oil dividing port 121 under the rotation of the separating component 12. The existence of the gap 13 ensures sufficient space to accommodate the oil droplets discharged during the rotation of the separating component 12. This gap 13 design prevents the separating component 12 from rubbing against the oil collecting component 11 during rotation, while the oil droplets can be discharged through the oil dividing port 121 on the surface of the separating component 12 and enter the gap 13, and then flow towards the oil collecting component 11. Furthermore, through the communication design between the oil dividing port 121 and the gap 13, the oil droplets can be collected and redirected to the oil dividing port 121 when passing through the separating component 12, and then flow into the gap 13 from the position of the oil dividing port 121. The overall shape of the oil collecting component 11 and the separating component 12 can be a hollow cylindrical structure, and both ends of the cylindrical structure are open.

[0039] In one embodiment, the inner wall of the oil collecting member 11 is provided with a plurality of protrusions 111.

[0040] In this embodiment, the oil collecting element 11 of the oil-gas separation structure 10 has multiple protrusions 111 on its inner wall to improve the collection of oil droplets during the oil-gas separation process. The specific working principle is as follows: when the separator 12 rotates inside the oil collecting element 11, the oil droplets discharged from the separator 12 enter the oil collecting element 11. The protrusions 111 on the inner wall of the oil collecting element 11 effectively interrupt the flow path of the oil droplets, that is, they can change the splash angle after the oil droplets collide with the inner wall surface of the oil collecting element 11, preventing the oil droplets from splashing back into the separator 12. The protrusions 111 are also located in the gap 13, and they can promote the coagulation and downward movement of the oil droplets, making it easier for the oil collecting element 11 to collect the oil droplets.

[0041] The protrusions 111 can be arranged in a regular pattern, for example, multiple rows are spaced apart along the axial direction, and each row includes multiple protrusions 111 evenly distributed in the circumferential direction.

[0042] In one embodiment, the surface of the protrusion 111 is smoothly disposed.

[0043] In this embodiment, the design of the oil collecting element 11 in the oil-gas separation structure 10 was further optimized, especially the surface treatment of the protrusion 111. The surface of the protrusion 111 can be designed to be smooth. The smooth surface of the protrusion 111 reduces the frictional resistance between the oil droplets and the inner wall of the oil collecting element 11, allowing the oil droplets to flow more smoothly along the inner wall of the oil collecting element 11 during the oil-gas separation process. This smooth surface characteristic helps the oil droplets slide down rapidly under the action of gravity, avoiding the accumulation or retention of oil droplets on the inner wall, thereby effectively reducing the loss of separated oil droplets.

[0044] Furthermore, the protrusion 111 is typically semi-circular, but can also be set to other shapes. However, the corresponding surface is preferably a smooth structure with flowing lines, which can change the trajectory of the splashed oil droplets. When the oil droplets splash vertically towards the inner wall of the oil collecting component 11, it is necessary to ensure that the oil droplets do not hit the inner wall of the oil collecting component 11 and then splash back vertically along their original trajectory.

[0045] In one embodiment, multiple oil outlets 121 are provided and the multiple oil outlets 121 are arranged circumferentially on the separator 12.

[0046] In this embodiment, the separator 12 can be provided with multiple oil distribution ports 121, which are arranged circumferentially on the separator 12. This is to effectively increase the oil-gas separation area and improve the uniformity of oil-gas separation. The working principle is as follows: When the separator 12 rotates inside the oil collecting member 11, due to the centrifugal force, oil droplets are separated from the gas and thrown out through the oil distribution ports 121. Providing multiple oil distribution ports 121 ensures that regardless of whether the separator 12 rotates clockwise or counterclockwise, oil droplets can flow into the oil collecting member 11 along any one of the oil distribution ports 121, thereby increasing the oil droplet capture rate.

[0047] In addition, the circumferential arrangement of multiple oil separators 121 helps maintain the balance of airflow during the separation process, prevents the separation efficiency from decreasing due to the airflow deviating in one direction, and ensures that the separator 12 can continuously and stably perform oil-gas separation during operation.

[0048] The specific shape of the oil separator 121 can be designed as a strip gap, which is arranged along the axial direction of the separator 12.

[0049] Combination Figure 7 As shown, in one embodiment, the oil collecting member 11 has a circumferentially provided limiting groove 14, and the separating member 12 has a circumferentially provided limiting strip 15; or, the oil collecting member 11 has a circumferentially provided limiting strip 15, and the separating member 12 has a circumferentially provided limiting groove 14; the limiting strip 15 can rotate along the limiting groove 14.

[0050] In this embodiment, the limiting strip 15 can rotate along the limiting groove 14, thereby providing guidance for the rotational movement. The cooperation between the limiting strip 15 and the limiting groove 14 not only restricts the correct rotational position of the separator 12 inside the oil collecting member 11, but also allows the limiting strip 15 to rotate while maintaining a fixed axial position. Furthermore, the cooperation between the limiting strip 15 and the limiting groove 14 enhances the structural stability of the entire device, reducing mechanical offset or misalignment caused by high-speed rotation during the operation of the compressor 20. The limiting groove 14 and the limiting strip 15 can be located at the end of the oil-gas separation structure 10 or in the middle of the oil-gas separation structure 10, as long as they can guide the rotation of the oil collecting member 11 and the separator 12. The arrangement between the limiting groove 14 and the limiting strip 15 also serves as a limiting effect, keeping the separator 12 rotating within the oil collecting member 11.

[0051] Specifically, taking the example of the limiting strip 15 being set on the separator 12 and the limiting groove 14 being set on the oil collecting part 11, the limiting groove 14 and the limiting strip 15 are annular as a whole, and the cross-section of the limiting groove 14 and the limiting strip 15 is arc-shaped. The limiting strip 15 is set on the outer wall of one end (the first end, the same below) of the separator 12, and the limiting groove 14 is set on the inner wall of one end of the oil collecting part 11. The limiting strip 15 can slide in the limiting groove 14.

[0052] Combination Figure 8 As shown, this embodiment of the invention also provides a compressor 20, including an exhaust passage 21 and an oil-gas separation structure 10 as described above.

[0053] In this embodiment, during the operation of the compressor 20, the oil-gas mixture is guided to the oil-gas separation structure 10 through the exhaust passage 21. Within the oil-gas separation structure 10, the oil in the oil-gas mixture is separated by the rotation of the separator 12 and discharged through the oil separator port 121, returning to the oil collection member 11. This process not only purifies the gas from the compressor 20 but also recovers the oil, reducing the energy consumption of the compressor 20. Figure 8 The direction of the middle arrow indicates the flow direction of the oil-gas mixture, which flows from right to left. The separated oil droplets flow downwards from the oil-gas separation structure 10 due to gravity, while the separated gas continues to move to the left and enters other components of the compressor 20 (such as the silencer chamber).

[0054] Combination Figure 9 As shown, in one embodiment, the oil collecting component 11 has an oil drain port 112, and the compressor 20 has an oil guide groove 22 that communicates with the oil drain port 112. The oil guide groove 22 is located at the bottom of the exhaust channel 21, and the oil drain port 112 is positioned towards the oil guide groove 22.

[0055] In this embodiment, the oil-gas mixture discharged from the exhaust channel 21 is first processed by the oil-gas separation structure 10, wherein the oil in the oil-gas mixture is separated and collected into the oil collecting member 11. The oil outlet 112 on the oil collecting member 11 is configured to face the oil guide groove 22, which is located at the bottom of the exhaust channel 21, allowing the oil discharged from the oil outlet 112 to flow along the oil collecting member 11 into the oil guide groove 22. The oil collecting member 11 is not a completely circular shell; the hollow portion of the oil collecting member 11 (i.e., the oil outlet 112) faces the oil guide groove 22. The oil collecting member 11 is usually fixed and does not rotate within the exhaust channel 21, while the separator 12 rotates inside the oil collecting member 11, thereby throwing out oil droplets; the oil droplets then flow downwards along the inner wall of the oil collecting member 11 and are discharged from the oil outlet 112 to the outside of the oil collecting member 11, i.e., onto the oil guide groove 22.

[0056] In one embodiment, the compressor 20 has an oil drain hole 23 that communicates with the oil guide groove 22, and the oil drain hole 23 is connected to the oil consumption point of the compressor 20.

[0057] In this embodiment, the oil separated from the oil collecting unit 11 flows into the oil guiding groove 22 through the oil drain port 112, and then is discharged through the oil drain hole 23 located next to the oil guiding groove 22. The oil drain hole 23 is connected to the oil consumption point of the compressor 20, and the separated oil can be reused, reducing the need for new oil replenishment. Of course, the oil drain hole 23 can also be an oil drain pipe, with one end connected to the oil guiding groove 22 and the other end connected to the oil consumption point of the compressor 20, which can also achieve oil reuse. Through this integrated oil recovery and recycling method, the compressor 20 can provide stable operation.

[0058] Combination Figure 10As shown, in one embodiment, the exhaust channel 21 includes a first channel 211 and a second channel 212. The diameter of the first channel 211 is larger than the diameter of the second channel 212. The first channel 211 and the second channel 212 are connected and a step is formed at the connection. The oil collecting member 11 is disposed in the first channel 211, and one end of the oil collecting member 11 is located on the step. The oil-gas separation structure 10 also includes a limiting member 16 that covers the other end of the oil collecting member 11. One end of the separating member 12 is rotatably connected to the limiting member 16.

[0059] In this embodiment, the exhaust passage 21 of the compressor 20 can be divided into a first passage 211 and a second passage 212, wherein the diameter of the first passage 211 is larger than the diameter of the second passage 212, that is, the exhaust passage 21 is a two-stage stepped circular hole. The first passage 211 has a larger diameter and is closer to the cylinder head; the second passage 212 has a smaller diameter and is closer to the exhaust muffler chamber. The entire oil-gas separation assembly is installed in the exhaust passage near the cylinder head, that is, in the first passage 211. The two passages are connected, and a step is formed at the connection. The oil collector 11 is disposed in the first passage 211, and one end of the oil collector 11 abuts against the step, so that the oil collector 11 can move in the first passage 211 but cannot move into the second passage 212. The oil-gas separation structure 10 also includes a limiting member 16, which covers the other end of the oil collector 11. Thus, both ends of the oil collecting component 11 are limited, and the oil collecting component 11 is fixed within the exhaust channel 21. In actual working environment, the oil collecting component 11 will not easily fall out of the exhaust channel 21. The oil-gas separation structure 10 (specifically, the oil collecting component 11 and the limiting component 16) can be installed in the exhaust channel 21 by an interference fit. The exhaust channel 21 may also not have two-stage stepped circular holes, that is, the exhaust channel 21 is a single channel. In this case, the interference fit or other connection methods described above can also be used to fix the oil-gas separation structure 10 and achieve the effect of separating oil and gas using the oil-gas separation structure 10.

[0060] As for the connection method between the limiting member and the other end (the second end, opposite to the first end mentioned above) of the separating member 12, it can be referred to the connection method between the other end of the separating member 12 and the oil collecting member 11 (in combination with...). Figure 7 (This will not be elaborated upon here.)

[0061] Furthermore, the three parts of the oil-gas separation structure 10—the oil collecting component 11, the separating component 12, and the limiting component 16—can all be made of plastic and can be integrally injection molded from plastic.

[0062] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An oil-gas separation structure, applied to a compressor, wherein the compressor has an exhaust passage for receiving an oil-gas mixture, characterized in that, The oil-gas separation structure includes an oil collecting component and a separating component. The oil collecting component is axially disposed within the exhaust channel, and the separating component is axially disposed within the oil collecting component and is rotatable relative to the oil collecting component in the axial direction. The separating component is provided with an oil distribution port communicating with the oil collecting component, and the oil distribution port is used to discharge the oil separated by the separating component during rotation onto the oil collecting component. The exhaust channel includes a first channel and a second channel. The diameter of the first channel is larger than the diameter of the second channel. The first channel and the second channel are connected and a step is formed at the connection. The oil collecting component is disposed in the first channel, and one end of the oil collecting component is located on the step. The oil-gas separation structure also includes a limiting component that covers the other end of the oil collecting component. One end of the separating component is rotatably connected to the limiting component. When the oil-gas mixture enters the exhaust channel, the flow area of ​​the oil-gas mixture narrows, which increases the flow speed of the oil-gas mixture. The oil-gas mixture is in a vortex flow state when it enters the exhaust channel. The oil-gas mixture flows spirally inside the oil-gas separation structure, driving the separator to rotate.

2. The oil-gas separation structure according to claim 1, characterized in that, A gap is provided between the oil collecting component and the separating component, and the oil separating port communicates with the gap.

3. The oil-gas separation structure according to claim 1, characterized in that, The inner wall of the oil collecting component has multiple protrusions.

4. The oil-gas separation structure according to claim 3, characterized in that, The surface of the protrusion is smoothly configured.

5. The oil-gas separation structure according to claim 1, characterized in that, The oil separator is provided in multiple ways, and the multiple oil separators are arranged circumferentially on the separator.

6. The oil-gas separation structure according to claim 1, characterized in that, The oil collecting component has a circumferentially oriented groove, and the separating component has a circumferentially oriented strip; or, the oil collecting component has a circumferentially oriented strip, and the separating component has a circumferentially oriented groove. The limiting strip can rotate along the limiting groove.

7. A compressor, characterized in that, It includes an exhaust passage and an oil-gas separation structure as described in any one of claims 1-6.

8. The compressor according to claim 7, characterized in that, The oil collecting component has an oil drain port, and the compressor has an oil guide groove that communicates with the oil drain port. The oil guide groove is located at the bottom of the exhaust channel, and the oil drain port is oriented towards the oil guide groove.

9. The compressor according to claim 8, characterized in that, The compressor has an oil drain hole that communicates with the oil guide groove, and the oil drain hole is connected to the oil supply point of the compressor.

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