An oil and gas separation sheet and an oil and gas separator

Abstract

The application discloses an oil-gas separation sheet and an oil-gas separator. The oil-gas separation sheet comprises a disc made of metal, and at least two sub-zones are arranged on the disc. Each sub-zone comprises a plurality of identical gap forming structures, and the gap forming structures in different sub-zones are arranged in a staggered manner on the disc. The oil-gas separation disc has an inner surface and an outer surface arranged oppositely. The gap forming structures form a protruding structure or a groove structure on the inner surface, and the gap forming structures form a corresponding groove structure or a protruding structure on the outer surface. The staggered arrangement is that the positions are offset in the circumferential direction and / or the radial direction. When adjacent discs are stacked by rotating at a preset angle, the upper disc and the lower disc are at least partially in contact, and a separation gap is formed between the adjacent discs. The technical problem of low oil-gas separation efficiency caused by the fact that the discs are too tightly attached to each other due to the flatness of the end surface of the disc or the structural design problem when the discs are stacked is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil-gas automatic separation, and more particularly relates to an oil-gas separation sheet and an oil-gas separator. BACKGROUND

[0002] At present, the structural forms of oil-gas separators are various, but the design standards and specifications are not unified. Under the background of the increasingly high separation efficiency requirement, most researchers at home and abroad tend to two-stage or multi-stage separators.

[0003] The working principle of the active centrifugal oil-gas separator is to form a rotating vortex in the separator by relying on external input energy, and the particles in the mixed gas flow are separated out under the action of centrifugal force. A commonly used active centrifugal separator is in the form of a cone, and a plurality of conical discs are installed on the rotating shaft of the cone. A small hole is opened on the position of the disc close to the rotating shaft, which is the flow passage of the mixed gas. An arc-shaped blade group is arranged on each disc. When the rotating shaft moves, the mixed gas will be thrown out along the annular space between the conical discs under the action of centrifugal force, so as to achieve the purpose of oil-gas separation.

[0004] However, since the disc works in a high-temperature environment for a long time, the existing plastic disc is prone to softening, and the disc is too tightly attached to each other due to the flatness or structural design problem of the end face of the disc, the gap is uneven or even disappears, resulting in low oil-gas separation efficiency. In addition, the existing metal disc is usually formed after the disc surface is formed, and then the partition is welded on the disc surface, which has a complex process and high cost. SUMMARY

[0005] In view of the problem that the existing disc is prone to being too tightly attached to each other, the gap is uneven or even disappears when the disc is stacked, resulting in low oil-gas separation efficiency, the purpose of the present application is to provide an oil-gas separation sheet. The oil-gas separation sheet comprises a disc made of metal, and at least two partitions are arranged on the disc. Each partition comprises a plurality of identical gap forming structures, and the gap forming structures in different partitions are arranged in a staggered manner on the disc. The oil-gas separation disc has an inner surface and an outer surface arranged oppositely. The gap forming structure forms a protruding structure or a groove structure on the inner surface, and the gap forming structure forms a corresponding groove structure or a protruding structure on the outer surface. The staggered arrangement is that the positions are offset in the circumferential direction and / or the radial direction. When the adjacent discs are stacked by rotating at a predetermined angle, the protruding structure of the upper disc at least partially contacts the outer surface of the lower disc or the protruding structure of the lower disc at least partially contacts the inner surface of the upper disc, and a separation gap is formed between the adjacent discs.

[0006] Compared with the prior art, the technical effects achieved by the technical scheme are: because the disc is provided with at least two subareas, each subarea includes a plurality of same gap forming structures, and the gap forming structures in different subareas are arranged in a staggered manner on the disc, when the discs are stacked at a relative rotation angle, the gap forming structures of the upper disc contact the gap forming structures of another subarea of the lower disc. However, because the gap forming structures in different subareas are arranged in a staggered manner on the disc, the protruding structures and the groove structures between adjacent discs cannot be completely fitted, the protruding structures of the upper disc at least partially contact the outer surface of the lower disc or the protruding structures of the lower disc at least partially contact the inner surface of the upper disc, thereby forming a uniform separation gap between adjacent discs, and the uniformity and stability of the disc gap are ensured through the staggered gap forming structures, and the oil-gas separation efficiency and reliability of the disc under the high-temperature and high-speed engine oil-gas separation environment are improved.

[0007] It should be noted that, in order to pursue light weight, the disc is often made very thin. The injection molded plastic disc is prone to problems such as thermal deformation, aging, even melting, insufficient structural strength, etc., which causes the gap between the discs to change or disappear, the separation efficiency to sharply decrease, or the risk of disc rupture. The disc is made of metal material in the present application, so the disc has excellent high-temperature resistance and structural strength, making the oil-gas separation disc have higher separation efficiency, longer service life and better reliability. In addition, the protruding structure and the groove structure of the gap forming structure can play the role of a reinforcing rib, thereby further improving the structural strength of the disc while ensuring the uniformity and stability of the disc gap.

[0008] Further, the disc includes a bottom surface and a disc surface; the bottom surface includes a connecting ring and connecting ribs, the connecting ring is provided with a mounting hole, and a plurality of connecting ribs are arranged at intervals on the side of the connecting ring, and the connecting ring is connected to the disc surface through the connecting ribs; wherein, a hollow area is arranged between adjacent two connecting ribs.

[0009] Compared with the prior art, the technical effects achieved by the technical scheme are: the transmission shaft drives the oil-gas separation disc to rotate through the mounting hole, and oil-gas separation is realized through the centrifugal force of rotation. The hollow area constitutes an inlet of the separation gap formed between the discs for the gas-liquid mixture.

[0010] Further, the gap forming structure continuously extends from the disc surface to the connecting rib; wherein, the gap forming structure includes a first partition on the disc surface and a second partition on the connecting rib; wherein, the first partition and the second partition are an integral molding structure.

[0011] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the first partition piece can form a separation gap between the disc surfaces of two adjacent disc pieces when the disc pieces are stacked; and the second partition piece can form a separation gap between the bottom surfaces of two adjacent disc pieces when the disc pieces are stacked. By arranging the first partition piece and the second partition piece in an integrated structure, the first partition piece and the second partition piece can be processed on the disc piece by one-time stamping during production and processing, thereby simplifying the production process, reducing the manufacturing cost, and ensuring the consistency of product quality. By arranging the gap forming structure to continuously extend from the disc surface to the connecting rib instead of extending in a bent manner, the effect of guiding flow and reducing flow resistance can be achieved, so that the fluid flows more smoothly, which helps to improve the efficiency of centrifugal separation and possibly reduce flow noise.

[0012] Further, the gap forming structure comprises: at least two second partition pieces with different widths, and different sizes of hollow regions are arranged between the second partition pieces with different widths.

[0013] Further, the first partition piece extends from the outer edge of the disc surface to the connection between the disc surface and the connecting rib; wherein the first partition piece extends along the generatrix direction of the disc surface.

[0014] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the generatrix is the shortest path between the inner edge and the outer edge of the disc surface. By arranging the first partition piece to extend along the generatrix direction of the disc surface, the most direct and least resistant flow channel is provided for the oil-gas mixture. The fluid does not need to flow in a complex bending path, thereby greatly reducing the flow resistance and energy loss. If the partition piece is arranged to extend in a curved or non-radial manner, the fluid will be forced to change direction, which is easy to produce vortex and turbulent flow. The straight channel arranged along the generatrix direction can avoid unnecessary flow turbulence, and ensure the stability and efficiency of the separation process.

[0015] It can be understood that the core principle of centrifugal separation is to use the centrifugal force generated by high-speed rotation to throw out the liquid droplets with larger density. When the first partition piece forming the separation gap is arranged along the generatrix direction, the movement direction of the fluid particles is highly consistent with the direction of the centrifugal force, thereby maximizing the use of the centrifugal force, making the oil-gas separation process more rapid and complete, and thereby significantly improving the oil-gas separation efficiency.

[0016] Further, the first partition piece comprises a first partition structure and a second partition structure; the first partition structure is a strip-shaped partition piece extending from the outer edge of the disc surface to the connection between the disc surface and the connecting rib, and the second partition structure comprises at least one block-shaped partition piece arranged along the extension direction of the strip-shaped partition piece; wherein the distance between the block-shaped partition piece of each gap forming structure and the outer edge of the disc surface is different.

[0017] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: by setting block-shaped separators on the strip-shaped separators, a composite structure of "main reinforcing ribs + secondary reinforcing ribs" can be formed, which greatly enhances the local stiffness and bending and torsional resistance of the long strip-shaped separators, effectively suppresses the harmful vibrations that may be generated during high-speed rotation, and ensures the stability of the separation gap.

[0018] Furthermore, the second partition structure includes two block partitions spaced apart along the extension direction of the strip partition; wherein the shape of the block partitions is rectangular; and the spacing between the two block partitions is different for each gap forming structure.

[0019] Compared with existing technologies, the technical advantages of this solution are as follows: multiple block-shaped separators provide multiple support points for the contact between the upper and lower discs, better ensuring the uniformity of the gap height across the entire contact surface and preventing the discs from warping due to uneven stress. Rectangles are among the easiest shapes to process, readily achievable with high precision during stamping, which is beneficial for mass production.

[0020] Furthermore, it also includes at least two reinforcing ribs, spaced apart around the periphery of the mounting hole.

[0021] Compared with existing technologies, the technical effects achieved by adopting this technical solution are: improving the structural strength of the periphery of the mounting hole and preventing deformation.

[0022] Furthermore, it also includes: a positioning component, which is set on the side of the connecting ring near the hollowed-out area and extends into the hollowed-out structure.

[0023] Compared with existing technologies, the technical effect achieved by this technical solution is that when discs are stacked in a rotating manner, the insertion direction of the discs can be identified and determined based on the position of the positioning component.

[0024] Furthermore, the present invention provides an oil-gas separator, which is formed by stacking any of the oil-gas separation plates as described above; wherein, the discs are provided with n kinds of staggered gap forming structures, and when the discs are stacked, the upper disc is rotated 360 / n degrees relative to the lower disc before being inserted.

[0025] The technical effects and advantages of this invention are as follows:

[0026] 1. Since at least two misaligned gap forming structures are provided on the disc, when the discs are stacked at a relative rotation angle, the gap forming structure of the upper disc will contact the other gap forming structure of the lower disc. However, since the gap forming structures are misaligned, the protrusion structure and the groove structure between adjacent discs cannot be completely fitted, and the protrusion structure of the upper disc at least partially contacts the outer surface of the lower disc or the protrusion structure of the lower disc at least partially contacts the inner surface of the upper disc, thereby forming a uniform separation gap between adjacent discs, and further ensuring the uniformity and stability of the disc gap through the misaligned gap forming structures, thereby improving the oil-gas separation efficiency and reliability of the disc in the high-temperature and high-speed engine oil-gas separation environment.

[0027] 2. In order to pursue lightweight, the disc is often made very thin. The injection molded plastic disc is prone to heat deformation, aging, even melting, insufficient structural strength and other problems, which leads to changes or disappearance of the gap between the discs, a sharp decline in separation efficiency, or risks such as disc rupture. The disc is made of metal material in the present application, so the disc has excellent high-temperature resistance and structural strength, making the oil-gas separation disc have higher separation efficiency, longer service life and better reliability. In addition, the protrusion structure and the groove structure of the gap forming structure can play the role of a reinforcing rib, thereby further improving the structural strength of the disc while ensuring the uniformity and stability of the disc gap.

[0028] 3. The generatrix is the shortest path between the inner edge and the outer edge of the disc surface. The first partition is arranged to extend along the generatrix direction of the disc surface, providing the most direct and minimum resistance flow channel for the oil-gas mixture. The fluid does not need to flow in a complex bending path, greatly reducing the flow resistance and energy loss. If the partition is extended in a curved or non-radial manner, it will force the fluid to change direction, which is prone to vortex and turbulent flow. The straight channel arranged along the generatrix direction can avoid unnecessary flow disorder and ensure the stability and efficiency of the separation process. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective structural schematic diagram of an oil-gas separation disc provided by the present application;

[0030] Figure 2 is Figure 1 a top view of the oil-gas separation disc in

[0031] Figure 3 is Figure 1 a stack diagram of the oil-gas separation disc in

[0032] Figure 4 is a perspective structural schematic diagram of another oil-gas separation disc provided by the present application;

[0033] Figure 5 is Figure 4 a top view of the oil-gas separation sheet;

[0034] Figure 6 is Figure 4 a stack diagram of the oil-gas separation sheet;

[0035] Figure 7 is Figure 1 a partition diagram of the oil-gas separation sheet;

[0036] Figure 8 is Figure 1 a top view of the oil-gas separation sheet Figure Two ;

[0037] Figure 9 is Figure 8 an A-A sectional view of the oil-gas separation sheet;

[0038] Figure 10 is Figure 8 an enlarged view of B in the oil-gas separation sheet;

[0039] Figure 11 is Figure 9 an enlarged view of C in the oil-gas separation sheet.

[0040] In the drawings:

[0041] 100, disc; 10, bottom surface; 11, mounting hole; 12, connecting ring; 13, reinforcing rib; 14, connecting rib; 15, hollowed-out area; 16, positioning member; 17, flow guide surface; 20, disc surface; 30, gap forming structure; 31, first partition; 32, second partition. DETAILED DESCRIPTION

[0042] The present application will be further described in conjunction with the drawings and specific embodiments. The embodiments of the present application are given for illustrative and descriptive purposes only and are not intended to be all inclusive or to limit the present application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application to thereby enable others skilled in the art to best utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated.

[0043] Referring to Figure 1 , which is a perspective structural diagram of an oil-gas separation sheet provided by the present application. In combination with Figures 1 to 11The oil-gas separation disc includes a disc 100 made of metal. The disc 100 is provided with at least two types of gap forming structures 30 arranged in a staggered manner. Specifically, the oil-gas separation disc 100 includes an inner surface and an outer surface arranged oppositely. The gap forming structure 30 forms a protruding structure or a groove structure on the inner surface, and the gap forming structure 30 forms a corresponding groove structure or protruding structure on the outer surface. For example, the gap forming structure 30 forms a groove structure on the upper end surface of the disc 100, and the gap forming structure 30 forms a corresponding protruding structure on the lower end surface of the disc 100. Of course, the gap forming structure 30 can also form a groove structure on the lower end surface of the disc 100, and the gap forming structure 30 forms a corresponding protruding structure on the upper end surface of the disc 100, which is not limited here.

[0044] In one specific embodiment, when the discs 100 are stacked, the protruding structure of the upper disc 100 at least partially contacts the groove structure of the lower disc 100, and a separation gap is formed between the adjacent discs 100. Such staggered arrangement ensures that when a plurality of discs 100 are stacked along the axial direction, the protruding structure of the upper disc 100 does not completely fall into the groove structure of the lower disc 100, but is in contact with the side wall of the groove structure or the flat area of the outer surface of the lower disc 100, thereby forming a stable and uniform axial gap between the adjacent discs 100. The axial separation gap is a key channel for the oil-gas mixture to pass through and be centrifugally separated. For example, the thickness of the disc 100 is 0.5 mm, and the size of the separation gap is 0.7 mm.

[0045] Further, the disc 100 is provided with n types of gap forming structures 30 arranged in a staggered manner, and the upper disc 100 is loaded after being rotated by a preset angle relative to the lower disc 100 when the discs 100 are stacked; wherein the preset angle is 360 / n degrees; n≥2. Further, the disc 100 is provided with n partitions, and each partition corresponds to one type of gap forming structure. The gap forming structures in different partitions are arranged in a staggered manner on the disc, that is, the positions of the gap forming structures in different partitions on the disc are offset in the circumferential direction and / or the radial direction. Wherein, a plurality of same gap forming structures are arranged in each partition, and the number of gap forming structures can be adjusted according to specific use requirements.

[0046] For example, when assembling and stacking, the first disc 100 is loaded at an arbitrary angle; when installing the second disc 100, it is rotated by 360 / n degrees around the central axis, and then stacked with the first disc 100; when installing the third disc 100, it is rotated by 360 / n degrees relative to the second disc 100, and then stacked and loaded; when installing the fourth disc 100, it is rotated by 360 / n degrees relative to the third disc 100, and then stacked and loaded. At this time, the installation angle of the n+1th disc 100 is the same as that of the first disc 100. The same is true for the subsequent discs.

[0047] Since the gap forming structures 30 are misaligned on the discs 100, when the discs 100 are stacked in a rotary manner, due to the offset in the circumferential and / or radial directions, or the size deviation, the protruding structure of the upper disc 100 cannot be completely fitted with the groove structure of the lower disc 100, so that stable support is achieved through the "protrusion-to-protrusion" or "wide-to-narrow" contact mode, thereby forming a highly uniform separation gap between adjacent discs 100.

[0048] In one specific embodiment, three misaligned gap forming structures 30 are provided on the disc 100. When assembling the stack, the first disc 100 is loaded at an arbitrary angle; when installing the second disc 100, it is rotated by 120 degrees around the central axis before being stacked with the first disc 100; when installing the third disc 100, it is rotated by 120 degrees relative to the second disc 100 before being stacked; when installing the fourth disc 100, it is rotated by 120 degrees relative to the third disc 100 before being stacked. At this time, the installation angle of the fourth disc 100 is the same as that of the first disc 100. The same applies to the subsequent discs.

[0049] For example, the disc 100 includes a bottom surface 10 and a disc surface 20, the bottom surface 10 is provided with a connecting ring 12, a hexagonal mounting hole 11 is formed in the middle of the connecting ring 12, and the mounting hole 11 cooperates with the transmission shaft to realize circumferential fixation and power transmission. The transmission shaft drives the oil-gas separation disc 100 to rotate through the mounting hole 11, and the oil-gas separation is realized through the centrifugal force of rotation. Specifically, the disc surface 20 is a circular truncated cone structure.

[0050] The connecting ring 12 is connected to the disc surface 20 through a plurality of connecting ribs 14. The plurality of connecting ribs 14 are arranged at intervals, and a hollow area 15 is arranged between adjacent two connecting ribs 14, which constitutes an entrance for the oil-gas mixture to enter the separation gap formed between the discs 100. Preferably, the hollow area 15 is partially formed on the disc surface 20.

[0051] In one specific embodiment, the gap forming structure 30 continuously extends from the disc surface 20 to the connecting rib 14. The gap forming structure 30 can not only form a separation gap between adjacent discs 100, but also serve as a reinforcing rib to improve the structural strength of the disc surface 20 and the connecting rib 14, preventing deformation of the connecting rib 14 and the disc surface 20 under high temperature and high speed rotation, which may cause uneven or even disappearance of the separation gap between the discs 100, affecting the separation efficiency. The material of the disc 100 is a metal piece, and the preferred material is aluminum.

[0052] It should be noted that the oil-gas separator is often arranged near the exhaust pipe and the turbocharger, and works in a high-temperature environment for a long time. The plastic disc 100 is prone to thermal deformation, aging, melting and other problems, which changes or disappears the gap between the discs 100, and causes the separation efficiency to decrease sharply, and even causes the entire separator to fail. In addition, in order to pursue lightweight, the disc 100 is often made very thin, and the plastic material has poor creep resistance and impact resistance, and may be broken due to insufficient structural strength under high-speed rotation. As can be seen, the disc 100 made of plastic material has the significant shortcomings of insufficient high-temperature resistance and poor structural strength.

[0053] The disc 100 is made of aluminum material in the present application, which can realize the perfect combination of lightweight, high strength and excellent high-temperature resistance, so that the oil-gas separation disc has higher separation efficiency, longer service life and better reliability.

[0054] Further, the gap forming structure 30 includes a first partition 31 on the disc surface 20 and a second partition 32 on the connecting rib 14. The first partition 31 can form a separation gap between the disc surfaces 20 of two adjacent discs 100 when the discs 100 are stacked; and the second partition 32 can form a separation gap between the connecting ribs 14 of two adjacent discs 100 when the discs 100 are stacked.

[0055] Further, the connecting ring 12 further has a reinforcing rib 13 on the side close to the mounting hole 11, and the reinforcing rib 13 is distributed around the mounting hole 11; the reinforcing rib 13 forms a convex structure on the upper end surface of the disc 100, and forms a groove structure on the lower end surface. In one specific embodiment, the mounting hole 11 is hexagonal, and the connecting ring 12 has three reinforcing ribs 13 evenly arranged on the side close to the mounting hole 11. For example, the reinforcing rib 13 includes a long side of an integral structure and short sides bent and connected at both ends of the long side, and the short sides of two adjacent reinforcing ribs 13 have a gap therebetween. For example, the end of the reinforcing rib 13 and the bent connection between the short side and the long side are both rounded to avoid stress concentration.

[0056] When the discs 100 are stacked in the form of sequentially rotating 120 degrees, the three reinforcing ribs 13 of two adjacent discs 100 are aligned.

[0057] Further, the bottom surface 10 further has a positioning member 16. When the discs 100 are stacked in the form of rotating and stacking, the stacking direction of the disc 100 can be identified and determined according to the position of the positioning member 16.

[0058] For example, the positioning member 16 is a protruding member arranged on one side of the connecting ring 12 close to the hollowed area 15. When the two adjacent dishes 100 are stacked in the form of sequentially rotating 120 degrees, the positioning members 16 between the two adjacent dishes 100 form an included angle of 120 degrees. For example, the end of the positioning member 16 and the joint between the positioning member 16 and the connecting ring 12 are both rounded to avoid stress concentration.

[0059] For example, the gap forming structure 30 is a partition strip extending from the disc surface 20 to the connecting rib 14. A flow guide surface 17 is further arranged between the end of the gap forming structure 30 and the outer edge of the disc surface 20.

[0060] In one embodiment, the partition strip is provided with two rectangular partition members along its length direction. According to the different spacing D between the two rectangular partition members, three different gap forming structures 30 are formed. In this embodiment, the disc surface 20 is divided into three 120-degree sectors, i.e., three partition areas, which are of the same shape. The spacing D1, D2, D3 between the two rectangular partition members arranged on the partition strip are all different.

[0061] For example, there are twelve partition strips evenly distributed on the dish 100, and four partition strips are arranged in each of the three partition areas. The spacing between the two rectangular partition members of the four partition strips in the first partition area is D1; the spacing between the two rectangular partition members of the four partition strips in the second partition area is D2; and the spacing between the two rectangular partition members of the four partition strips in the third partition area is D3. Among them, D1>D2>D3.

[0062] In one embodiment, there are twelve partition strips evenly distributed on the dish 100, and the dish is divided into four partition areas, and each partition area corresponds to a first partition strip, a second partition strip, and a third partition strip of different widths. Among them, the width of the first partition strip is W1, the width of the second partition strip is W2, and the width of the third partition strip is W3, W1W2W3. Further, the partition strip continuously extends from the outer edge of the disc surface 20 to the connecting rib 14. For example, the twelve partition strips are arranged in the order of first width, second width, third width, first width, and so on on the dish 100.

[0063] For example, the width W1 of the first partition strip is 3.2 mm; the width W2 of the second partition strip is 3.3 mm; and the width W3 of the third partition strip is 3.5 mm. The width of the connecting rib where the first partition strip is located is 5.2 mm; the width of the connecting rib where the second partition strip is located is 5.2 mm; and the width of the connecting rib where the third partition strip is located is 5.5 mm.

[0064] Further, the hollowed areas 15 arranged between two adjacent connecting ribs 14 also have three sizes, so that the hollowed areas 15 are staggered in the circumferential direction and / or the radial direction when the discs 100 are stacked, thereby further improving the oil-gas separation effect.

[0065] In the description of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0066] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the scope of protection of the present application. The structures, devices and operation methods not specifically described and explained in the present application, if not specially stated and limited, are implemented according to the conventional means in the art.

Claims

1. An oil-gas separator, characterized in that, The oil-gas separator includes a metal disc with at least two partitions. Each partition contains multiple identical gap-forming structures, and the gap-forming structures in different partitions are staggered on the disc. The oil-gas separator disc has an inner surface and an outer surface that are positioned opposite each other. The gap-forming structures form protrusions or grooves on the inner surface and corresponding grooves or protrusions on the outer surface. The staggered arrangement is characterized by a positional offset in the circumferential and / or radial directions. When adjacent discs are stacked at a preset angle, the protrusions of the upper disc are at least partially in contact with the outer surface of the lower disc, or the protrusions of the lower disc are at least partially in contact with the inner surface of the upper disc, and a separation gap is formed between adjacent discs. The disc includes a bottom surface and a plate surface; the bottom surface includes a connecting ring and connecting ribs, the connecting ring has mounting holes, and multiple connecting ribs are spaced apart around the connecting ring, the connecting ring is connected to the plate surface through the connecting ribs; wherein, a hollow area is provided between two adjacent connecting ribs; a gap forming structure extends continuously from the plate surface to the connecting ribs; wherein, the gap forming structure includes a first partition on the plate surface and a second partition on the connecting ribs; wherein, the first partition and the second partition are integrally formed.

2. The oil-gas separator according to claim 1, characterized in that, The gap-forming structure includes: at least two second partitions of different widths, and a hollow area of ​​different size is provided between the second partitions of different widths.

3. The oil-gas separator according to claim 1, characterized in that, The first separator extends from the outer edge of the disc to the junction of the disc and the connecting rib; wherein the first separator extends along the generatrix of the disc.

4. The oil-gas separator according to claim 1, characterized in that, The first partition includes a first partition structure and a second partition structure; the first partition structure is a strip-shaped partition extending from the outer edge of the disc surface to the connection between the disc surface and the connecting rib, and the second partition structure includes at least one block-shaped partition disposed along the extending direction of the strip-shaped partition; wherein, for each gap forming structure, the distance between the block-shaped partition and the outer edge of the disc surface is different.

5. The oil-gas separator according to claim 4, characterized in that, The second partition structure includes two block partitions spaced apart along the extension direction of the strip partition; wherein the shape of the block partitions is rectangular; and the spacing between the two block partitions is different for each type of gap forming structure.

6. The oil-gas separator according to claim 1, characterized in that, Also includes: At least two reinforcing ribs are spaced apart around the mounting hole.

7. The oil-gas separator according to claim 1, characterized in that, Also includes: The positioning component is located on the side of the connecting ring near the hollowed-out area and extends into the hollowed-out structure.

8. An oil-gas separator, characterized in that, The oil-gas separator is formed by stacking oil-gas separation plates as described in any one of claims 1-7; wherein, the discs are provided with n kinds of staggered gap forming structures, and when the discs are stacked, the upper disc is rotated 360 / n degrees relative to the lower disc before being inserted; n≥2.

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