Folded plate centrifugal oil mist separator

Abstract

This invention belongs to the technical field of oil mist separation devices, specifically relating to a folded-plate centrifugal oil mist separator. During operation, the oil mist gas, under the influence of inertia and the negative pressure of the fan, enters from the oil mist gas inlet on the outer periphery of the separation disc assembly. This causes large liquid particles to be forcibly adhered to the inner wall of the first guide cavity, and then ejected from the first oil-throwing hole under centrifugal force. Smaller, more responsive liquid particles, under negative pressure, flow sequentially through the first connecting opening, the second guide cavity, the second connecting opening again, and the third guide cavity, achieving vortex separation through multiple guide protrusions. The separated oil is ejected from the second oil-throwing hole, and the oil mist gas then undergoes final separation by passing through a filter element installed in the third guide cavity. This invention, by forming a folded-plate guide path inside the separation disc assembly and integrating the filter element inside the separation disc, results in a more compact overall structure, easier integration with mechanical equipment, and improved separation efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of oil mist separation devices, specifically relating to a folding plate centrifugal oil mist separator. Background Technology

[0002] Centrifugal oil mist separators are mainly suitable for various mechanical equipment that generate oil mist exhaust gas. They are used to capture micron-sized oil mist particles in the air to achieve exhaust gas purification and oil recovery.

[0003] For example, Chinese patent document CN201551940U discloses an oil mist separator, including a cyclone separator and an active centrifugal separator connected in series to the exhaust port of the cyclone separator. The exhaust port of the active centrifugal separator is connected to a terminal separation chamber through a filter screen. This constitutes a four-stage separation structure consisting of the cyclone separator, the active centrifugal separator, the filter screen, and the terminal separation chamber. The active centrifugal separator includes a motor and a cylinder with an oil drain pipe coaxially mounted on the motor output shaft. Blades are located at the end of the motor output shaft corresponding to the cylinder. An exhaust port is located at one end of the cylinder corresponding to the motor, and an air inlet is located at the other end. The oil drain pipe is located downwards at the lower end of the cylinder. The motor drives the blades to rotate within the cylinder. Oil mist entering the cylinder from the air inlet collides with the blades and accumulates, then flows to the inner wall of the cylinder under centrifugal force, and finally exits along the inner wall of the cylinder through the oil drain pipe. Its active centrifugal separator has a relatively simple structure, using only conventional blades for simple separation, resulting in a relatively poor separation effect. Therefore, it usually requires a multi-stage separation structure. For example, it uses a four-stage separation structure consisting of a cyclone separator, an active centrifugal separator, a filter screen, and a terminal separation chamber connected in series, making the overall structure quite complex.

[0004] Chinese patent document CN207734770U discloses a rotary centrifugal oil mist separation device, including a horizontal separation cylinder. Inside the separation cylinder, from the inlet pipe end to the outlet pipe end, are sequentially installed a metal baffle oil separator, an oil mist separation net, a dry filter, an activated carbon adsorption layer, and a photo-oxidation purification layer. The metal baffle oil separator is used to retain large oil droplets on the metal baffles. The oil mist separation net has several parabolic guide strips, with oil guide holes at the ends of the guide strips. One end of the oil mist separation net has an oil collection cup. The rotation of the oil mist separation net causes oil mist to flow along the parabolic guide strips through the oil guide holes into the oil collection cup. The dry filter uses a metal mesh frame, with a filter layer sandwiched inside the metal mesh frame. The photo-oxidation purification layer includes a catalyst and UV ultraviolet light beams. The metal baffle oil separator, oil mist separation net, dry filter, and photo-oxidation purification layer are each connected to a motor. Its centrifugal rotary filter body is an oil mist separation net, which also has the problem of relatively poor separation effect. In addition, it also needs to design a multi-stage filtration structure in series in the axial direction, making the overall structure more complex. For example, it needs to be equipped with metal baffle oil separator, oil mist separation net and dry filter at least at intervals along the axial direction. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a folding plate centrifugal oil mist separator that makes its overall structure more compact, easier to integrate with mechanical equipment, and improves separation efficiency.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a baffle centrifugal oil mist separator, comprising a separation disk assembly capable of rotating around its own axis, the separation disk assembly having an outer circular main body surface arranged around its own axis, and the separation disk assembly having a plurality of first guide cavities evenly spaced along the circumferential direction in the region near the outer circular main body surface, the first guide cavities being located on the side of the outer circular main body surface near the axis of the separation disk assembly, and the length direction of the first guide cavity being consistent with the circumferential direction of the outer circular main body surface, the first guide cavity having an inner ring sidewall located on the side near the axis of the separation disk assembly and an outer ring sidewall located on the side near the outer circular main body surface; the outer circular main body surface is provided with An oil mist airflow inlet is provided, which is connected to the first guide cavity one by one. The oil mist airflow inlet divides the outer ring sidewall of the first guide cavity into a first outer sidewall and a second outer sidewall. The length of the first outer sidewall is less than the length of the second outer sidewall. The direction of the second outer sidewall pointing to the oil mist airflow inlet is the rotation direction of the baffle centrifugal oil mist separator during operation. The separation disk assembly is provided with a second guide cavity and a third guide cavity arranged at intervals along its axial direction. The second guide cavity and the third guide cavity are respectively corresponding to the first guide cavity. The second guide cavity is located on the side of the first guide cavity closer to the axis of the separation disk assembly. The length direction of the second guide cavity is consistent with the length direction of the first guide cavity. The inner annular sidewall of the first guide cavity and the second guide cavity are connected by a first connecting opening, which is located at one end of the length direction of the first guide cavity and is arranged opposite to the first outer sidewall. The second guide cavity and the third guide cavity share a common guide base plate, and a second connecting opening is provided on the common guide base plate to connect the second guide cavity and the third guide cavity. The second connecting opening is located at the end of the second guide cavity away from the first connecting opening along its length direction. An annular flange is coaxially fixed at one end of the separation disk assembly. The third guide cavity is connected to the central shaft hole of the annular flange through a guide structure. The annular flange is used to connect with the separator seal. A sealed fit is formed so that the airflow entering from the oil mist airflow inlet passes sequentially through the first guide cavity, the first connecting opening, the second guide cavity, the second connecting opening, and the third guide cavity, and is finally discharged through the air outlet structure of the separator seal. A filter is installed in the third guide cavity along its guide path. Adjacent first guide cavities are connected by a first oil-throwing hole. The first, second, and third guide cavities, which are sequentially connected through the first and second connecting openings, belong to the same group of guide cavities. The end of the third guide cavity with the second connecting opening is connected to the first guide cavity of another sequentially adjacent group of guide cavities through the second oil-throwing hole. In a preferred embodiment, multiple guide protrusions are spaced along the protrusion distribution line on the side of the second connecting opening near the first connecting opening. The protrusion distribution line is consistent with the airflow guiding direction from the second guide cavity to the third guide cavity. The width direction of the guide protrusions is consistent with the width direction of the second guide cavity, and the thickness of the guide protrusions decreases from the top to the root.

[0007] A further preferred embodiment is that the outer ring sidewall of the first guide cavity is an arc surface arranged coaxially with respect to the outer circular main body surface, and the inner ring sidewall of the first guide cavity is a straight surface arranged perpendicularly to the diameter direction of the separation disk assembly.

[0008] A further preferred embodiment is: the separator disk assembly includes a separator disk, a first cover plate, and a second cover plate coaxially fixedly assembled together. The separator disk has a first end along its axial direction near the separator seal and a second end away from the separator seal. The first cover plate is correspondingly disposed at the first end of the separator disk, and the second cover plate is correspondingly disposed at the second end of the separator disk. The annular flange portion of the separator disk assembly is disposed on the separator disk or on the first cover plate. The first guide cavity is formed by the end face of the first cover plate, the end face of the second cover plate, and a first guide flow hole disposed on the separator disk. The oil mist airflow inlet passes through the two end faces of the first guide flow hole along its axial direction. The second guide cavity is formed by the end face of the first cover plate and a second guide groove disposed on the separator disk, or by the end face of the second cover plate and a second guide groove disposed on the separator disk. When the second guide cavity is formed by the end face of the first cover plate and a second guide groove disposed on the separator disk... The third flow guiding cavity is formed by combining the end face of the second cover plate and the third flow guiding groove on the separation plate. The first oil slinger hole is formed by combining the end face of the second cover plate and the first oil slinger groove on the separation plate. The second oil slinger hole is formed by combining the end face of the second cover plate and the second oil slinger groove on the separation plate. The first connection opening is formed by combining the end face of the first cover plate and the first connection notch on the separation plate. When the second flow guiding cavity is formed by combining the end face of the second cover plate and the second flow guiding groove on the separation plate, the third flow guiding cavity is formed by combining the end face of the first cover plate and the third flow guiding groove on the separation plate. The first oil slinger hole is formed by combining the end face of the first cover plate and the first oil slinger groove on the separation plate. The second oil slinger hole is formed by combining the end face of the first cover plate and the second oil slinger groove on the separation plate. The first connection opening is formed by combining the end face of the second cover plate and the first connection notch on the separation plate.

[0009] Depending on the installation positions of the second and third guide cavities, one preferred embodiment is as follows: the separation disc assembly includes a separation disc, a first cover plate, and a second cover plate coaxially fixed together. The separation disc has a first end along its axial direction close to the separator seal and a second end away from the separator seal. The first cover plate is correspondingly disposed at the first end of the separation disc, and the second cover plate is correspondingly disposed at the second end of the separation disc. The first guide cavity is composed of the end face of the first cover plate, the end face of the second cover plate, and a first guide flow hole disposed on the separation disc. The second guide cavity is composed of the end face of the first cover plate and a second guide flow hole disposed on the separation disc. The third flow guiding cavity is composed of the end face of the second cover plate and the third flow guiding groove on the separation disk. The annular flange of the separation disk assembly is a first annular flange on the separation disk, and the first cover plate is sleeved on the outer periphery of the first annular flange. The separation disk has a central mounting post and a separation disk flow guiding shaft hole coaxially arranged relative to its own axis. The axis of the central mounting post is used to coaxially connect to the rotating power shaft. The inner wall of the separation disk flow guiding shaft hole near the second cover plate is fixedly connected to the outer peripheral surface of the central mounting post through several connecting spokes. The end of the separation disk flow guiding shaft hole away from the second cover plate has a... A flow-guiding conical surface is connected to the central shaft hole of the first annular flange. The diameter of the flow-guiding conical surface near the first annular flange is smaller than the diameter of the flow-guiding conical surface near the connecting spoke. The side surface of the connecting spoke is part of the inner wall of the third flow-guiding groove. The third flow-guiding cavity is connected to the flow-guiding shaft hole of the separation disk through the first intermediate flow-guiding hole provided in the bottom wall of the third flow-guiding groove. The filter element is fitted into the third flow-guiding groove, and the side of the filter element near the second connecting opening has a flow-guiding gap space relative to the inner wall of the third flow-guiding groove. The filter element is composed of a filter cotton retainer and a filter cotton assembly. The retainer has a relatively closed filter cotton mounting cavity. The side of the filter cotton mounting cavity facing the second cover plate has a filter cotton mounting opening for inserting the filter cotton into the filter cotton mounting cavity. The side of the filter cotton mounting cavity that connects to the second connecting opening is provided with a first mounting sidewall. The side of the filter cotton mounting cavity that connects to the first intermediate guide hole is provided with a second mounting sidewall. The first mounting sidewall is provided with a plurality of first oil discharge holes that connect the filter cotton mounting cavity and the guide space. The second mounting sidewall is provided with a plurality of second oil discharge holes that connect the filter cotton mounting cavity and the first intermediate guide hole.

[0010] A further preferred embodiment is as follows: the present invention further includes a separator seal for fixing to the air outlet end of the oil mist separator; the central shaft hole of the first annular flange and the outer peripheral surface of the separator seal form a sealing fit; a bearing mounting seat is fixedly provided at the axial center of the end of the separator seal near the central mounting post, the bearing mounting seat is used to form a rotational fit with the rotating power shaft by installing the bearing, and a plurality of seal guide holes are provided in the outer peripheral area of ​​the bearing mounting seat at the end of the separator seal near the central mounting post, the seal guide holes connecting the central shaft hole of the separator seal and the guide shaft hole of the separator disk; the central mounting post has a separator disk mounting shaft hole for the rotating power shaft to pass through, and the inner wall of the separator disk mounting shaft hole is provided with a transmission keyway at the end near the separator seal.

[0011] A further preferred embodiment is: the separator seal includes a sealing cylinder for mating with the first annular flange, the outer diameter of the bearing mounting seat is smaller than the inner diameter of the sealing cylinder, the bearing mounting seat and the sealing cylinder are connected by a plurality of inner end connecting blocks arranged at intervals along the circumference of the sealing cylinder, the side of two adjacent inner end connecting blocks facing each other is used to form the inner sidewall of the seal guide hole, the air outlet structure of the separator seal is composed of the seal guide hole and the central shaft hole of the sealing cylinder; the sealing mating structure between the central shaft hole of the first annular flange and the sealing cylinder includes a first spiral seal and a labyrinth seal, the first spiral seal is disposed on the first annular flange, the labyrinth seal is disposed on the sealing cylinder, the outer circumferential surface of the sealing cylinder is provided with an annular oil guide groove, the annular oil guide groove is disposed on the side of the labyrinth seal near the guide cone surface, and during assembly, the annular oil guide groove is located in the inner region of the small diameter end of the guide cone surface.

[0012] Depending on the installation positions of the second and third guide cavities, another preferred embodiment is as follows: The separation disc assembly includes a separation disc, a first cover plate, and a second cover plate coaxially fixed together. The separation disc has a first end close to the separator seal along its axial direction and a second end away from the separator seal. The first cover plate is correspondingly disposed at the first end of the separation disc, and the second cover plate is correspondingly disposed at the second end of the separation disc. The first guide cavity is composed of the end face of the first cover plate, the end face of the second cover plate, and a first guide flow hole disposed on the separation disc. The second guide cavity is composed of the end face of the second cover plate and a second guide groove disposed on the separation disc. The third guide cavity is composed of the end face of the first cover plate and a third guide groove disposed on the separation disc. The annular flange portion of the separation disc assembly is a second annular flange disposed on the first cover plate. The first cover plate has an annular extension in the inner circumferential region of the second annular flange for covering the third guide groove. A first center positioning protrusion is located at the axial center of the first end of the separation disc. The filter element is fitted around the outer periphery of the first central positioning protrusion. The third flow guiding cavity is connected to the central shaft hole of the second annular flange through the second intermediate flow guiding hole provided on the annular extension. The filter element is snapped into the third flow guiding groove, and the side of the filter element near the second connecting opening has a flow guiding interval space relative to the inner sidewall of the third flow guiding groove. The filter element is composed of a filter cotton retainer and a filter cotton assembly. The filter cotton retainer has a relatively closed filter cotton mounting cavity. The side of the filter cotton mounting cavity facing the second cover plate has a filter cotton mounting opening for inserting the filter cotton into the filter cotton mounting cavity. The side of the filter cotton mounting cavity that connects to the second connecting opening is provided with a first mounting sidewall. The side of the filter cotton mounting cavity that connects to the second intermediate flow guiding hole is provided with a second mounting sidewall. The first mounting sidewall is provided with a plurality of first oil discharge holes that connect the filter cotton mounting cavity and the flow guiding interval space. The second mounting sidewall is provided with a plurality of second oil discharge holes that connect the filter cotton mounting cavity and the second intermediate flow guiding hole.

[0013] A further preferred embodiment is that the present invention further includes a separator seal for fixing to the air outlet end of the oil mist separator; the separator seal includes a sealing cylinder for forming a sealing fit with the second annular flange, and the air outlet structure of the separator seal is the central shaft hole of the sealing cylinder; the sealing fit structure between the central shaft hole of the second annular flange and the sealing cylinder includes a second spiral seal and a labyrinth seal, the second spiral seal is disposed on the second annular flange, and the labyrinth seal is disposed on the sealing cylinder.

[0014] A further preferred embodiment is that the inner circumferential surface of the second annular flange includes a second conical surface located near the annular extension, the diameter of the second conical surface near the annular extension is larger than the diameter of its other end, and an annular oil guide groove is provided on the outer circumferential surface of the sealing cylinder, the annular oil guide groove is located on the side of the labyrinth seal near the second conical surface, and during assembly, the annular oil guide groove is located in the inner region of the small diameter end of the second conical surface.

[0015] A further preferred embodiment is: the second end of the separator disc has a second central positioning protrusion at the shaft center, and the second cover plate is sleeved on the outer periphery of the second central positioning protrusion.

[0016] A further preferred embodiment is: a mounting shaft hole for the rotating power shaft to pass through is provided at the center of the separation disc, and a transmission keyway is provided on the inner wall of the mounting shaft hole near the outer end face of the second center positioning protrusion.

[0017] The beneficial effects of this invention are as follows: During operation, the oil mist gas enters from the oil mist gas inlet on the outer periphery of the separation disc assembly under the action of inertia and the negative pressure of the fan. The guide channel formed by the first guide cavity, the first connecting opening, the second guide cavity, the second connecting opening, and the third guide cavity is relatively independent of the external gas flow field of the baffle centrifugal oil mist separator. This allows large liquid particles to be forcibly attached to the inner wall of the first guide cavity under the action of inertia and negative pressure, and then thrown out from the first oil throwing hole under the action of centrifugal force. Liquid particles with small inertia and strong following ability flow through the first connecting opening, the second guide cavity, the second connecting opening, and the third guide cavity in sequence under the action of negative pressure, and achieve vortex separation through multiple guide protrusions set on the path from the second guide cavity to the third guide cavity. The oil mist gas then completes the final separation through the filter installed at the third guide cavity. The separated oil is thrown out from the second oil throwing hole, and the gas is finally discharged through the air outlet structure of the separator seal. This invention creates a folded flow path inside the separation disc assembly and integrates the filter element inside the separation disc, resulting in a more compact overall structure that is easier to integrate with mechanical equipment while improving separation efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the first embodiment of the present invention (including the separation disk assembly and the separator seal). Figure 2 for Figure 1 The front view of the embodiment shown; Figure 3 for Figure 2 AA section view; Figure 4 for Figure 3 BB section view; Figure 5 for Figure 3 CC section view; Figure 6 for Figure 1 The illustrated embodiment is a three-dimensional structural diagram after removing the first cover plate and the separator seal; Figure 7 for Figure 1 A three-dimensional structural diagram of the embodiment after removing the second cover plate; Figure 8 for Figure 1 A three-dimensional structural diagram of the separation disk in the illustrated embodiment; Figure 9 for Figure 1 A three-dimensional structural diagram of the separation disk in the illustrated embodiment from another angle; Figure 10 for Figure 1 Side view of the separation disk in the illustrated embodiment; Figure 11 for Figure 10 DD sectional view; Figure 12 for Figure 1 A three-dimensional structural schematic diagram of the filter cotton retainer in the illustrated embodiment; Figure 13 for Figure 1 A three-dimensional structural schematic diagram of the separator seal in the illustrated embodiment; Figure 14 for Figure 1 The illustrated embodiment is a three-dimensional structural diagram of its application implementation. Figure 15 for Figure 14 The front view of the embodiment shown; Figure 16 for Figure 15 EE sectional view; Figure 17 for Figure 16 A magnified view of a portion at point F; Figure 18 This is a front view of a second embodiment of the present invention (including a separator disk assembly and a separator seal). Figure 19 for Figure 18 GG cross-sectional view; Figure 20 for Figure 18 The illustrated embodiment is a three-dimensional structural diagram after removing the first cover plate and the separator seal; Figure 21 for Figure 18 A three-dimensional structural diagram of the separation disk in the illustrated embodiment; Figure 22 for Figure 18 A three-dimensional structural diagram of the separation disk in the illustrated embodiment from another angle; Figure 23 for Figure 18 A three-dimensional structural schematic diagram of the first cover plate in the illustrated embodiment; Figure 24 for Figure 18 The illustrated embodiment is shown in a cross-sectional view (front view) during application. Figure 25for Figure 24 A magnified view of a portion at point H; Figure 26 This is a cross-sectional view (front view) of the third embodiment of the present invention during application. Figure 27 for Figure 26 A magnified view of part J.

[0019] Component markings in the diagram: Separator disc 1, Filter element 2, First cover plate 3, Second cover plate 4, Separator seal 5, Rotary power shaft 6, Bearing 7, Separator body 8; First guide cavity 101, First guide flow hole 101a, Oil mist airflow inlet 102, Second guide cavity 103, Second guide groove 103a, Third guide cavity 104, Third guide groove 104a, First connecting opening 105, First connecting notch 105a, Common guide base plate 106, Second connecting opening 107, Guide protrusion 108, First oil throwing hole 109, First oil throwing groove 109a, Second oil throwing hole 110, Second oil throwing groove 110a, First annular flange 111, Guide conical surface 112, Central mounting post 113, Connecting spoke 114. First intermediate guide hole 115, first spiral seal 116, first central positioning protrusion 117, second central positioning protrusion 118; filter cotton retainer 201, filter cotton 202, filter cotton installation opening 203, first installation side wall 204, second installation side wall 205, first oil drain hole 206, second oil drain hole 207; second annular flange 301, annular extension 302, second intermediate guide hole 303, second spiral seal 304, second conical surface 305; bearing mounting seat 501, sealing guide hole 502, sealing cylinder 503, labyrinth seal 504, annular oil guide groove 505, inner end connecting block 506; equipment air outlet 801, equipment air inlet 802, turbine 803, locking nut 804, positioning sleeve 805. Detailed Implementation

[0020] 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 embodiments of the present invention, and not all embodiments. 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.

[0021] Please see Figures 1 to 17The present invention includes a separating disk assembly capable of rotating around its own axis. The separating disk assembly has an outer circular main body surface arranged around its own axis. A plurality of first guide cavities 101 are evenly spaced along the circumferential direction in a region near the outer circular main body surface. The first guide cavities 101 are located on the side of the outer circular main body surface near the axis of the separating disk assembly, and the length direction of the first guide cavities 101 is consistent with the circumferential direction of the outer circular main body surface. The first guide cavity 101 has an inner ring sidewall located near the axis of the separating disk assembly and an outer ring sidewall located near the outer circular main body surface. An oil mist airflow inlet 102 is provided on the outer circular main body surface, communicating with each of the first guide cavities 101. The oil mist airflow inlet 102 divides the outer ring sidewall of the first guide cavity 101 into a first outer sidewall and a second outer sidewall. The length of the first outer sidewall is less than the length of the second outer sidewall, meaning that the outer surface of the outer ring sidewall of the first guide cavity 101 is the aforementioned outer circular main body surface, and the second outer sidewall points towards the oil mist airflow inlet 102. The direction of 2 is the rotation direction of the centrifugal oil mist separator during operation; the separation disk assembly is provided with a second guide cavity 103 and a third guide cavity 104, which are arranged axially and correspond one-to-one with the first guide cavity 101. The second guide cavity 103 is located on the side of the first guide cavity 101 near the axis of the separation disk assembly, and its length direction is consistent with the length direction of the first guide cavity 101; the inner ring sidewall of the first guide cavity 101 and the second guide cavity 103 are connected by a first connecting opening 105. The first connecting opening 105 is located at one end of the length direction of the first guide cavity 101 and is arranged opposite to the first outer sidewall; the second guide cavity 103 and the third guide cavity 104 have a common guide base plate 106, and a second connecting opening 107 is provided on the common guide base plate 106 to connect the second guide cavity 103 and the third guide cavity 104. The second connecting opening 107 is located at the end of the second guide cavity 103 away from the first connecting opening 105 along its length direction. An annular flange is coaxially fixed at one end of the separator assembly. The third guide cavity 104 is connected to the central shaft hole of the annular flange through a guide structure. The annular flange is used to form a sealing fit with the separator seal 5, so that the airflow flowing in from the oil mist airflow inlet 102 passes sequentially through the first guide cavity 101, the first connecting opening 105, the second guide cavity 103, the second connecting opening 107, and the third guide cavity 104, and can finally be discharged through the air outlet structure of the separator seal 5; the third guide cavity A filter element 2 is installed on the flow path of 104; two adjacent first flow guide chambers 101 are connected by a first oil-throwing hole 109; the first flow guide chamber 101, the second flow guide chamber 103 and the third flow guide chamber 104 are connected in sequence by a first connecting opening 105 and a second connecting opening 107 and are the same group of flow guide chambers. The third flow guide chamber 104 is connected to the first flow guide chamber 101 of another group of flow guide chambers in sequence by a second oil-throwing hole 110 at the end where the second connecting opening 107 is provided.That is, the first oil-throwing hole 109 and the second oil-throwing hole 110 are both used to connect two adjacent sets of guide cavities.

[0022] The length direction of the first guide cavity 101 is consistent with the circumferential direction of the outer circular main body surface, and the length direction of the second guide cavity 103 is consistent with the length direction of the first guide cavity 101. This should be interpreted broadly, taking the radial section of the separation disk assembly as a reference plane. The length direction of the first guide cavity 101 is set as the first direction line, and the length direction of the second guide cavity 103 is set as the second direction line. The first direction lines corresponding to multiple first guide cavities 101 can form a circle or regular polygon arranged coaxially with respect to the outer circular main body surface. Similarly, the second direction lines corresponding to multiple second guide cavities 103 can also form a circle or regular polygon arranged coaxially with respect to the outer circular main body surface.

[0023] In some preferred embodiments, a plurality of guide protrusions 108 are provided at intervals along the protrusion distribution line on the side of the second connecting opening 107 near the first connecting opening 105. The protrusion distribution line is consistent with the airflow guiding direction from the second guiding cavity 103 to the third guiding cavity 104. The width direction of the guide protrusions 108 is consistent with the width direction of the second guiding cavity 103. The thickness of the guide protrusions 108 decreases in the direction from their top to their root. The area where the guide plate 108 is set should be interpreted broadly. The inner wall of the opening on the side of the second connecting opening 107 closest to the first connecting opening 105 is designated as the first arrangement surface of the guide plate. One large surface of the shared guide base plate 106 (corresponding to the inner wall of the second guide cavity 103) is designated as the second arrangement surface of the guide plate, and the other large surface (corresponding to the inner wall of the third guide cavity 104) is designated as the third arrangement surface of the guide plate. "The side of the second connecting opening 107 closest to the first connecting opening 105" refers to any one or more of the following areas: the area where the first arrangement surface of the guide plate is located, the area located on the second arrangement surface of the guide plate and close to the first arrangement surface of the guide plate, and the area located on the third arrangement surface of the guide plate and close to the first arrangement surface of the guide plate. In the preferred embodiment shown in the attached figures, the guide plate 108 is provided in both the area where the first arrangement surface of the guide plate is located and the area located on the second arrangement surface of the guide plate and close to the first arrangement surface of the guide plate. The distribution line of the guide plates is preferably an arc shape. The purpose of the guide plate 108 is to adjust the density of oil mist particles with low inertia and strong following ability that reach the third guide cavity 104. If it is too high, it will not only consume more negative pressure power, but also significantly reduce the filtration effect of the oil mist airflow in the filter element 2. If it is too low, the probability of solid particles in the filter element 2 being washed away by oil will be reduced, and they will easily adhere, dry and condense, shortening the service life of the filter element 2 and the disassembly and maintenance cycle. It is impossible to completely eliminate the oil mist particles with low inertia and strong following ability that reach the third guide cavity 104. In this case, if the other parameters of the separation disk 1 remain unchanged, the guide plate 108 can be omitted or the cross-sectional area of ​​the guide path of the first connecting opening 105 and the second connecting opening 107 can be adjusted and increased to make the density of oil mist particles with low inertia and strong following ability in the third guide cavity 104 reach our design standard and ensure the expected durability of the filter cotton function.

[0024] To facilitate manufacturing and effectively ensure oil mist separation, in a preferred embodiment of the present invention, the outer ring sidewall of the first guide cavity 101 is an arc surface arranged coaxially with respect to the outer circular main body surface. This minimizes the influence of the external gas flow field of the baffle centrifugal oil mist separator on the gas flow field within the guide cavity, and also minimizes the influence of the baffle centrifugal oil mist separator on the external gas flow field. The inner ring sidewall of the first guide cavity 101 is a straight surface perpendicular to the diameter direction of the separation disk assembly. This facilitates oil slinging and minimizes the influence of the guide protrusion 108 on the gas flow field within the guide cavity. In this embodiment, both the first direction line and the second direction line can be considered as straight lines arranged parallel to the inner ring sidewall of the first guide cavity 101.

[0025] To facilitate manufacturing and effectively ensure oil mist separation, in a preferred embodiment of the present invention, the separating disc assembly includes a separating disc 1, a first cover plate 3, and a second cover plate 4 coaxially fixed together. The separating disc 1 has a first end along its axial direction near the separator seal 5 and a second end away from the separator seal 5. The first cover plate 3 is correspondingly disposed at the first end of the separating disc 1, and the second cover plate 4 is correspondingly disposed at the second end of the separating disc 1. The annular flange portion of the separating disc assembly is disposed on the separating disc 1 or on the first cover plate 3. In this embodiment, apart from the necessary connecting screws, the separating disc assembly mainly consists of the separating disc 1, the filter element 2, the first cover plate 3, and the second cover plate 4. For easy repeated assembly and disassembly, the separating disc 1 and the first cover plate 3, and the separating disc 1 and the second cover plate 4, can generally be fixedly connected by connecting screws. Of course, in some alternative embodiments, various other conventional fixing connection methods can also be used.

[0026] Accordingly, the first guide cavity 101 is preferably composed of the end face of the first cover plate 3, the end face of the second cover plate 4, and the first guide hole 101a provided on the separation disk 1, with the oil mist airflow inlet 102 passing through the two end faces of the first guide hole 101a in the axial direction; the second guide cavity 103 is composed of the end face of the first cover plate 3 and the second guide groove 103a provided on the separation disk 1, or it is composed of the end face of the second cover plate 4 and the second guide groove 103a provided on the separation disk 1. Since the separator seal 5 is used to fix it at the air outlet of the oil mist separation device, the configuration of the second guide cavity 103 determines its installation method in specific application scenarios, and also determines the configuration of functional parts such as the third guide cavity 104, the first oil slinger hole 109, and the second oil slinger hole 110.

[0027] When the second guide cavity 103 is formed by combining the end face of the first cover plate 3 and the second guide groove 103a provided on the separation plate 1, the third guide cavity 104 is formed by combining the end face of the second cover plate 4 and the third guide groove 104a provided on the separation plate 1, and the first oil-throwing hole 109 is formed by combining the end face of the second cover plate 4 and the first oil-throwing groove 109a provided on the separation plate 1, the second oil-throwing hole 110 is formed by combining the end face of the second cover plate 4 and the second oil-throwing groove 110a provided on the separation plate 1, and the first connecting opening 105 is formed by combining the end face of the first cover plate 3 and the first connecting notch 105a provided on the separation plate 1; When the second guide cavity 103 is formed by combining the end face of the second cover plate 4 and the second guide groove 103a provided on the separation plate 1, the third guide cavity 104 is formed by combining the end face of the first cover plate 3 and the third guide groove 104a provided on the separation plate 1, and the first oil-throwing hole 109 is formed by combining the end face of the first cover plate 3 and the first oil-throwing groove 109a provided on the separation plate 1, the second oil-throwing hole 110 is formed by combining the end face of the first cover plate 3 and the second oil-throwing groove 110a provided on the separation plate 1, and the first connecting opening 105 is formed by combining the end face of the second cover plate 4 and the first connecting notch 105a provided on the separation plate 1.

[0028] The configuration of the second flow guide cavity 103 determines its installation method in specific application scenarios, and also determines the flow guide structure between the third flow guide cavity 104 and the separator seal 5.

[0029] In some preferred embodiments, the separator assembly includes a separator 1, a first cover plate 3, and a second cover plate 4 coaxially fixed together. The separator 1 has a first end along its axial direction near the separator seal 5 and a second end away from the separator seal 5. The first cover plate 3 is correspondingly disposed at the first end of the separator 1, and the second cover plate 4 is correspondingly disposed at the second end of the separator 1. The first guide cavity 101 is composed of the end face of the first cover plate 3, the end face of the second cover plate 4, and a first guide flow hole 101a disposed on the separator 1. The second guide cavity 103 is composed of the end face of the first cover plate 3 and a second guide flow groove 103a disposed on the separator 1. The third guide cavity 104 is composed of the end face of the second cover plate 4 and a second guide flow groove 103a disposed on the separator 1. The third guide groove 104a on the separator disk 1 is assembled; the annular flange of the separator disk assembly is a first annular flange 111 provided on the separator disk 1, and the first cover plate 3 is sleeved on the outer periphery of the first annular flange 111; the separator disk 1 has a central mounting post 113 and a separator disk guide shaft hole coaxially arranged relative to its own axis, the axis of the central mounting post 113 is used to coaxially connect the rotating power shaft 6, the inner wall of the separator disk guide shaft hole near the second cover plate 4 is fixedly connected to the outer peripheral surface of the central mounting post 113 through a number of connecting spokes 114, and the end of the separator disk guide shaft hole away from the second cover plate 4 has a guide cone surface 112 for colliding with the central shaft hole of the first annular flange 111. The diameter of the guide cone 112 near the first annular flange 111 is smaller than the diameter of the guide cone 112 near the connecting spoke 114; the side surface of the connecting spoke 114 is part of the inner wall of the third guide groove 104a; the third guide cavity 104 is connected to the separation disk guide shaft hole through the first intermediate guide hole 115 provided on the bottom wall of the third guide groove 104a; the filter element 2 is snapped into the third guide groove 104a, and the side of the filter element 2 near the second connecting opening 107 has a guide gap space relative to the inner wall of the third guide groove 104a; the filter element 2 is composed of a filter cotton holder 201 and filter cotton 202, and the filter cotton holder 201 has... The filter cotton installation cavity is relatively closed. The side of the filter cotton installation cavity facing the second cover plate 4 has a filter cotton installation opening 203. The filter cotton installation opening 203 is used to install the filter cotton 202 into the filter cotton installation cavity. The side of the filter cotton installation cavity that is connected to the second connecting opening 107 is provided with a first installation sidewall 204. The side of the filter cotton installation cavity that is connected to the first intermediate guide hole 115 is provided with a second installation sidewall 205. The first installation sidewall 204 is provided with a plurality of first oil discharge holes 206 that connect the filter cotton installation cavity and the guide space. The second installation sidewall 205 is provided with a plurality of second oil discharge holes 207 that connect the filter cotton installation cavity and the first intermediate guide hole 115.

[0030] The filter cotton holder 201 has a relatively closed filter cotton mounting cavity, meaning it only has the necessary opening structures such as the filter cotton mounting opening 203, the first oil discharge hole 206, and the second oil discharge hole 207. The filter cotton 202 can be any existing conventional material suitable for the separator's operating conditions. The closed side wall of the filter cotton mounting cavity containing the second oil discharge hole 207 can increase the flow field path for filtering oil mist particles. The first oil discharge hole 206 and the second oil discharge hole 207 can be set according to the mounting method and the rotation direction of the separation disc 1. The outer side wall of the filter cotton holder 201 and the inner side wall of the third flow guide groove 104a are usually clearance fit. During assembly, the filter element 2 is integrally fitted and snapped into the third flow guide groove 104a. More specifically, during assembly, the area around the outer side where the second oil discharge hole 207 is located is scraped smooth and a layer of sealant with a composition suitable for the working conditions is applied and dried for assembly, or a layer of rubber with a material suitable for the working conditions is pasted on, so that the fit between the filter cotton retainer 201 and the end face of the cover plate is optimized from a clearance fit to a small interference fit, thereby achieving the assembly standard while reducing the processing difficulty and precision of the bottom wall of the third guide groove 104a.

[0031] To facilitate repeated disassembly and assembly, the present invention also includes a separator seal 5 for fixing to the air outlet end of the oil mist separator. In some alternative embodiments, the separator seal 5 can also be integrated with the housing of the separator body 8. The central shaft hole of the first annular flange 111 and the outer peripheral surface of the separator seal 5 form a sealing fit. A bearing mounting seat 501 is fixedly provided at the axial center of the end of the separator seal 5 near the central mounting post 113. The bearing mounting seat 501 is used to form a rotational fit with the rotating power shaft 6 by mounting the bearing 7. A plurality of seal guide holes 502 are provided in the outer peripheral area of ​​the bearing mounting seat 501 at the end of the separator seal 5 near the central mounting post 113. The seal guide holes 502 connect the central shaft hole of the separator seal 5 and the separator disk guide shaft hole. The axial center of the central mounting post 113 has a separator disk mounting shaft hole through which the rotating power shaft 6 passes. The inner wall of the separator disk mounting shaft hole is provided at the end near the separator seal 5. The transmission keyway is used to form a key connection with the rotating power shaft 6. In some further preferred embodiments, the bearing mounting base 501 may adopt a central through-hole structure, and the bearing 7 can be limited and installed in the central through-hole of the bearing mounting base 501 by the positioning sleeve 805. In specific installation, the rotating power shaft 6 passes through the separation disc mounting shaft hole of the central mounting column 113, and the separation disc 1 is locked and fixed by the locking nut 804 and the locking washer, so that the separation disc assembly and the rotating power shaft 6 rotate synchronously as a whole. The installation position of the bearing 7 is close to the separation disc assembly and the position of the separator seal 5, which can achieve a stable and reliable rotational fit structure.

[0032] The separator seal 5 includes a sealing cylinder 503 for mating with the first annular flange 111. The outer diameter of the bearing mounting seat 501 is smaller than the inner diameter of the sealing cylinder 503. The bearing mounting seat 501 and the sealing cylinder 503 are connected by a plurality of inner end connecting blocks 506 spaced apart along the circumference of the sealing cylinder. The side of two adjacent inner end connecting blocks 506 facing each other forms the inner sidewall of the seal guide hole 502. The air outlet structure of the separator seal 5 is formed by the combination of the seal guide hole 502 and the central shaft hole of the sealing cylinder 503; the first annular flange 111 The sealing structure between the central shaft hole and the sealing cylinder 503 includes a first spiral seal 116 and a labyrinth seal 504. The first spiral seal 116 is disposed on the first annular flange 111, and the labyrinth seal 504 is disposed on the sealing cylinder 503. The sealing cylinder 503 has an annular oil guide groove 505 on the outer circumferential surface of the labyrinth seal 504 near the guide cone surface 112. During assembly, the annular oil guide groove 505 is located in the inner region of the small diameter end of the guide cone surface 112, which is the end of the guide cone surface 112 near the first annular flange 111. The oil separated by the labyrinth seal 504 can flow into the guide cone surface 112 from the annular oil guide groove 505 under the action of gravity and centrifugal force, pass through the second oil drain hole 207 of the filter cotton, and finally be thrown out from the second oil throwing hole 110, without being sucked away by negative pressure, further improving the separation efficiency.

[0033] Further reading Figures 18 to 27In some other preferred embodiments, the separator assembly includes a separator 1, a first cover plate 3, and a second cover plate 4 coaxially fixed together. The separator 1 has a first end along its axial direction near the separator seal 5 and a second end away from the separator seal 5. The first cover plate 3 is correspondingly disposed at the first end of the separator 1, and the second cover plate 4 is correspondingly disposed at the second end of the separator 1. The first guide cavity 101 is composed of the end face of the first cover plate 3, the end face of the second cover plate 4, and a first guide flow hole 101a disposed on the separator 1. The second guide cavity 103 is composed of the end face of the second cover plate 4 and... The second flow guide groove 103a on the separation disk 1 is combined to form the third flow guide cavity 104, which is composed of the end face of the first cover plate 3 and the third flow guide groove 104a on the separation disk 1. The annular flange of the separation disk assembly is the second annular flange 301 on the first cover plate 3. The first cover plate 3 has an annular extension 302 in the inner circumferential region of the second annular flange 301 for covering the third flow guide groove 104a. The first end of the separation disk 1 has a first central positioning protrusion 117 at the axial center. The annular extension 302 is sleeved on the outer circumference of the first central positioning protrusion 117. The third flow guiding cavity 104 is connected to the second intermediate flow guiding hole 303 and the central shaft hole of the second annular flange 301 provided on the annular extension 302. The filter element 2 is snapped into the third flow guiding groove 104a, and the side of the filter element 2 near the second connecting opening 107 has a flow guiding interval space relative to the inner wall of the third flow guiding groove 104a. The filter element 2 is composed of a filter cotton retainer 201 and a filter cotton 202. The filter cotton retainer 201 has a relatively closed filter cotton mounting cavity, and the side of the filter cotton mounting cavity facing the second cover plate 4 has a filter cotton mounting opening. The filter cotton installation opening 203 is used to insert the filter cotton 202 into the filter cotton installation cavity. The filter cotton installation cavity is provided with a first installation sidewall 204 on one side for connecting the second connecting opening 107. The filter cotton installation cavity is provided with a second installation sidewall 205 on one side for connecting the second intermediate guide hole 303. The first installation sidewall 204 is provided with a plurality of first oil discharge holes 206 connecting the filter cotton installation cavity and the guide space. The second installation sidewall 205 is provided with a plurality of second oil discharge holes 207 connecting the filter cotton installation cavity and the second intermediate guide hole 303.

[0034] Similarly, in the above embodiments, the present invention also includes a separator seal 5 for fixing to the air outlet end of the oil mist separator; the separator seal 5 includes a sealing cylinder 503 for forming a sealing fit with the second annular flange 301, and the air outlet structure of the separator seal 5 is the central shaft hole of the sealing cylinder 503; the sealing fit structure between the central shaft hole of the second annular flange 301 and the sealing cylinder 503 includes a second spiral seal 304 and a labyrinth seal 504, the second spiral seal 304 is disposed on the second annular flange 301, and the labyrinth seal 504 is disposed on the sealing cylinder 503.

[0035] The inner circumferential surface of the second annular flange 301 includes a second conical surface 305 located near the end of the annular extension 302. The diameter of the second conical surface 305 near the end of the annular extension 302 is larger than the diameter of its other end. An annular oil guide groove 505 is provided on the outer circumferential surface of the sealing cylinder 503. The annular oil guide groove 505 is located on the side of the labyrinth seal 504 near the second conical surface 305. During assembly, the annular oil guide groove 505 is located in the inner region of the small diameter end of the second conical surface 305. The small diameter end of the second conical surface 305 is the end of the second conical surface 305 away from the annular extension 302.

[0036] In the implementation of the above embodiments, the axis of the separation disc assembly can be set horizontally (allowing for slight tilt) or vertically (allowing for slight tilt). Figure 24 and Figure 25 In the application scenario shown, the axis of the separation disc assembly is vertically arranged, and the annular oil guide groove 505 can be omitted from the sealing cylinder 503, and the second conical surface 305 can be omitted from the inner circumferential surface of the second annular flange 301. Figure 26 and Figure 27 In the application scenario shown, the axis of the separation disc assembly is set in the horizontal direction, the sealing cylinder 503 is provided with both a labyrinth seal 504 and an annular oil guide groove 505, and the inner circumferential surface of the second annular flange 301 is provided with a second conical surface 305 and a second spiral seal 304.

[0037] To facilitate processing and assembly, in some embodiments, the second end of the separating disc 1 has a second center positioning protrusion 118 at its shaft center, and the second cover plate 4 is sleeved on the outer periphery of the second center positioning protrusion 118. The separating disc 1 has a separating disc mounting shaft hole at its shaft center for the rotating power shaft 6 to pass through. The inner wall of the separating disc mounting shaft hole has a transmission keyway at the end near the outer end face of the second center positioning protrusion 118, which is used to form a key connection with the rotating power shaft 6.

[0038] Figures 14 to 17 The illustrated embodiment corresponds to application scenario one. Figure 25 and Figure 26 The illustrated embodiment corresponds to application scenario two. Figure 26 and Figure 27The illustrated embodiment corresponds to application scenario three. In scenarios one, two, and three, when separating anti-oxidative emulsified lubricating oils, the appropriately sized baffle centrifugal oil mist separator, within a suitable negative pressure power and separator speed range, can separate liquid oil mist particles in the oil mist gas to meet national and international standards. When separating water mist containing abrasives, the gap between the baffle centrifugal oil mist separator and a certain part of the separator body can be designed to be relatively small. Utilizing the gas flow field generated by the rotation of the baffle centrifugal oil mist separator under negative pressure, the water mist containing abrasives can be effectively intercepted from being drawn in by the negative pressure at the joint between the annular flange and the sealing cylinder, thereby increasing the disassembly and maintenance cycle of the baffle centrifugal oil mist separator. Furthermore, before shutdown, it should be cleaned with clean water mist for a certain period of time to prevent the attached abrasive particles from drying and condensing. The baffle centrifugal oil mist separator described in this invention is not recommended for separating easily oxidized and solidified oil mist gases such as cooking fumes. In scenarios two and three, while ensuring the functionality and expected lifespan of other components, negative pressure can be avoided, and the oil mist gas can be allowed to overflow from the baffle-type guide cavity of the separator assembly.

Claims

1. A centrifugal oil mist separator with baffle plates, comprising a separation disc assembly capable of rotating about its own axis, characterized in that: The separator assembly has an outer circular main body surface arranged around its own axis. Multiple first guide cavities (101) are evenly spaced along the circumference in the region near the outer circular main body surface. The first guide cavities (101) are located on the side of the outer circular main body surface near the axis of the separator assembly, and the length direction of the first guide cavity (101) is consistent with the circumferential direction of the outer circular main body surface. The first guide cavity (101) has an inner ring sidewall located near the axis of the separator assembly and an outer ring sidewall located near the outer circular main body surface. An oil mist airflow inlet (102) is provided on the outer circular main body surface, communicating with each of the first guide cavities (101). The outer ring sidewall of the first guide cavity (101) is divided into a first outer sidewall and a second outer sidewall, the length of the first outer sidewall being less than the length of the second outer sidewall; the separation disk assembly is provided with a second guide cavity (103) and a third guide cavity (104) arranged axially at intervals, the second guide cavity (103) and the third guide cavity (104) corresponding one-to-one with the first guide cavity (101), the second guide cavity (103) being located on the side of the first guide cavity (101) near the axis of the separation disk assembly, the length direction of the second guide cavity (103) being consistent with the length direction of the first guide cavity (101); the inner ring sidewall of the first guide cavity (101) and the second guide cavity (104) are separated by a first outer sidewall and a second outer sidewall. The first flow guide cavity (103) and the third flow guide cavity (104) are connected by a first connecting opening (105), which is located at one end of the length direction of the first flow guide cavity (101) and is arranged opposite to the first outer wall; the second flow guide cavity (103) and the third flow guide cavity (104) have a common flow guide base plate (106), and a second connecting opening (107) is provided on the common flow guide base plate (106) to connect the second flow guide cavity (103) and the third flow guide cavity (104). The second connecting opening (107) is located at one end of the second flow guide cavity (103) away from the first connecting opening (105) along its length direction; an annular ring is coaxially fixed at one end of the separation disk assembly in the axial direction. The flange portion and the third guide cavity (104) are connected to the central shaft hole of the annular flange portion through the guide structure. The annular flange portion is used to form a sealing fit with the separator seal (5) so that the airflow flowing in from the oil mist airflow inlet (102) passes through the first guide cavity (101), the first connecting opening (105), the second guide cavity (103), the second connecting opening (107) and the third guide cavity (104) in sequence, and can finally be discharged through the air outlet structure of the separator seal (5); the third guide cavity (104) is equipped with a filter (2) on its guide path; two adjacent first guide cavities (101) are connected through the first oil slinger hole (109);The first guide cavity (101), the second guide cavity (103), and the third guide cavity (104), which are sequentially connected through the first connecting opening (105) and the second connecting opening (107), belong to the same group of guide cavities. The third guide cavity (104) at the end where the second connecting opening (107) is located is connected to the first guide cavity (101) of another sequentially adjacent group of guide cavities via a second oil-throwing hole (110).

2. The folding plate centrifugal oil mist separator as described in claim 1, characterized in that: The outer ring sidewall of the first flow guide cavity (101) is an arc surface arranged coaxially with respect to the outer circular main body surface, and the inner ring sidewall of the first flow guide cavity (101) is a flat surface arranged perpendicular to the diameter direction of the separation disk assembly.

3. The folding plate centrifugal oil mist separator as described in claim 1, characterized in that: The separation disc assembly includes a separation disc (1), a first cover plate (3), and a second cover plate (4) that are coaxially fixed together. The separation disc (1) has a first end that is close to the separator seal (5) along its axial direction and a second end that is far away from the separator seal (5). The first cover plate (3) is correspondingly disposed at the first end of the separation disc (1), and the second cover plate (4) is correspondingly disposed at the second end of the separation disc (1). The annular flange portion of the separation disc assembly is disposed on the separation disc (1) or on the first cover plate (3). The first guide cavity (101) is composed of the end face of the first cover plate (3), the end face of the second cover plate (4) and the first guide hole (101a) provided on the separation disk (1), and the oil mist airflow inlet (102) passes through the two end faces of the first guide hole (101a) in the axial direction; the second guide cavity (103) is composed of the end face of the first cover plate (3) and the second guide groove (103a) provided on the separation disk (1), or it is composed of the end face of the second cover plate (4) and the second guide groove (103a) provided on the separation disk (1); When the second guide cavity (103) is formed by combining the end face of the first cover plate (3) and the second guide groove (103a) provided on the separation plate (1), the third guide cavity (104) is formed by combining the end face of the second cover plate (4) and the third guide groove (104a) provided on the separation plate (1), and the first oil-throwing hole (109) is formed by combining the end face of the second cover plate (4) and the first oil-throwing groove (109a) provided on the separation plate (1), the second oil-throwing hole (110) is formed by combining the end face of the second cover plate (4) and the second oil-throwing groove (110a) provided on the separation plate (1), and the first connecting opening (105) is formed by combining the end face of the first cover plate (3) and the first connecting notch (105a) provided on the separation plate (1); When the second guide cavity (103) is formed by the end face of the second cover plate (4) and the second guide groove (103a) provided on the separation plate (1), the third guide cavity (104) is formed by the end face of the first cover plate (3) and the third guide groove (104a) provided on the separation plate (1), and the first oil-throwing hole (109) is formed by the end face of the first cover plate (3) and the first oil-throwing groove (109a) provided on the separation plate (1), the second oil-throwing hole (110) is formed by the end face of the first cover plate (3) and the second oil-throwing groove (110a) provided on the separation plate (1), and the first connecting opening (105) is formed by the end face of the second cover plate (4) and the first connecting notch (105a) provided on the separation plate (1).

4. The folding plate centrifugal oil mist separator as described in claim 1, characterized in that: The separation disk assembly includes a separation disk (1), a first cover plate (3), and a second cover plate (4) that are coaxially fixed together. The separation disk (1) has a first end that is close to the separator seal (5) along its axial direction and a second end that is far away from the separator seal (5). The first cover plate (3) is correspondingly disposed at the first end of the separation disk (1), and the second cover plate (4) is correspondingly disposed at the second end of the separation disk (1). The first guide cavity (101) is composed of the end face of the first cover plate (3), the end face of the second cover plate (4), and a first guide flow hole (101a) disposed on the separation disk (1). The second guide cavity (103) is composed of the end face of the first cover plate (3) and a second guide groove (103a) disposed on the separation disk (1). The third guide cavity (104) is composed of the end face of the second cover plate (4) and a third guide groove (104a) disposed on the separation disk (1). The annular flange of the separator assembly is a first annular flange (111) provided on the separator (1), and a first cover plate (3) is sleeved on the outer periphery of the first annular flange (111). The separator (1) has a central mounting post (113) and a separator guide shaft hole coaxially arranged relative to its own axis. The axis of the central mounting post (113) is used to coaxially connect the rotating power shaft (6). The inner wall of the separator guide shaft hole near the second cover plate (4) is fixedly connected to the outer periphery of the central mounting post (113) through several connecting spokes (114). The end of the separator guide shaft hole away from the second cover plate (4) has a guide cone surface (112) for contacting the central shaft hole of the first annular flange (111). The diameter of the guide cone surface (112) near the first annular flange (111) is smaller than the diameter of the guide cone surface (112) near the connecting spokes (114). The side surface of the connecting spoke (114) is part of the inner wall of the third flow guide groove (104a). The third flow guide cavity (104) is connected to the flow guide shaft hole of the separation disk through the first intermediate flow guide hole (115) provided on the bottom wall of the third flow guide groove (104a). The filter element (2) is snapped into the third flow guide groove (104a), and the side of the filter element (2) near the second connecting opening (107) has a flow guide interval space relative to the inner wall of the third flow guide groove (104a). The filter element (2) is composed of a filter cotton retainer (201) and filter cotton (202). The filter cotton retainer (201) has a relatively closed filter cotton mounting cavity. The filter cotton mounting cavity faces the first intermediate flow guide hole (115) of the separation disk (104a). The second cover plate (4) has a filter cotton installation opening (203) on one side. The filter cotton installation opening (203) is used to install the filter cotton (202) into the filter cotton installation cavity. The filter cotton installation cavity is provided with a first installation sidewall (204) on one side for connecting the second connection opening (107). The filter cotton installation cavity is provided with a second installation sidewall (205) on one side for connecting the first intermediate guide hole (115). The first installation sidewall (204) is provided with a plurality of first oil discharge holes (206) connecting the filter cotton installation cavity and the guide space. The second installation sidewall (205) is provided with a plurality of second oil discharge holes (207) connecting the filter cotton installation cavity and the first intermediate guide hole (115).

5. The folding plate centrifugal oil mist separator as described in claim 4, characterized in that: It also includes a separator seal (5) for fixing to the air outlet of the oil mist separator; the central shaft hole of the first annular flange (111) and the outer peripheral surface of the separator seal (5) form a sealing fit; a bearing mounting seat (501) is fixedly provided at the axial center of the separator seal (5) near the central mounting post (113), the bearing mounting seat (501) is used to form a rotational fit with the rotating power shaft (6) by mounting the bearing (7), and a number of seal guide holes (502) are provided in the outer peripheral area of ​​the bearing mounting seat (501) at the end of the separator seal (5) near the central mounting post (113), the seal guide holes (502) are connected to the central shaft hole of the separator seal (5) and the separator disk guide shaft hole; the central mounting post (113) has a separator disk mounting shaft hole for the rotating power shaft (6) to pass through, and the inner wall of the separator disk mounting shaft hole is provided with a transmission keyway at the end near the separator seal (5).

6. The folding plate centrifugal oil mist separator as described in claim 5, characterized in that: The separator seal (5) includes a sealing cylinder (503) for mating with the first annular flange (111). The outer diameter of the bearing mount (501) is smaller than the inner diameter of the sealing cylinder (503). The bearing mount (501) and the sealing cylinder (503) are connected by a plurality of inner end connecting blocks (506) spaced apart along the circumference of the sealing cylinder. The side of two adjacent inner end connecting blocks (506) facing each other forms the inner wall of the seal guide hole (502). The air outlet structure of the separator seal (5) is composed of the seal guide hole (502) and the central shaft hole of the sealing cylinder (503). The sealing fit structure between the central shaft hole of the first annular flange (111) and the sealing cylinder (503) includes a first spiral seal (116) and a labyrinth seal (504). The first spiral seal (116) is disposed on the first annular flange (111), and the labyrinth seal (504) is disposed on the sealing cylinder (503). The outer circumferential surface of the sealing cylinder (503) is provided with an annular oil guide groove (505). The annular oil guide groove (505) is disposed on the side of the labyrinth seal (504) close to the flow guide cone surface (112), and during assembly, the annular oil guide groove (505) is located in the inner region of the small diameter end of the flow guide cone surface (112).

7. The folding plate centrifugal oil mist separator as described in claim 1, characterized in that: The separation disk assembly includes a separation disk (1) coaxially fixedly assembled with a first cover plate (3) and a second cover plate (4). The separation disk (1) has a first end close to the separator seal (5) along its axial direction and a second end away from the separator seal (5). The first cover plate (3) is correspondingly disposed at the first end of the separation disk (1), and the second cover plate (4) is correspondingly disposed at the second end of the separation disk (1). The first guide cavity (101) is composed of the end face of the first cover plate (3), the end face of the second cover plate (4), and a first guide flow hole (101a) disposed on the separation disk (1). The second guide cavity (103) is composed of the end face of the second cover plate (4) and a second guide groove (103a) disposed on the separation disk (1). The third guide cavity (104) is composed of the end face of the first cover plate (3) and a third guide groove (104a) disposed on the separation disk (1). The annular flange of the separation disc assembly is a second annular flange (301) provided on the first cover plate (3). The first cover plate (3) has an annular extension (302) in the inner circumferential region of the second annular flange (301) for covering the third flow guide groove (104a). The first end of the separation disc (1) has a first central positioning protrusion (117) at the axial center. The annular extension (302) is sleeved on the outer circumference of the first central positioning protrusion (117). The third flow guide cavity (104) is connected through the second intermediate flow guide hole (303) provided on the annular extension (302) and the central shaft hole of the second annular flange (301). The filter element (2) is fitted into the third flow guide groove (104a), and the side of the filter element (2) near the second connecting opening (107) has a flow guide interval space relative to the inner sidewall of the third flow guide groove (104a). The filter element (2) is filtered by the filter The filter cotton holder (201) and the filter cotton (202) are combined. The filter cotton holder (201) has a relatively closed filter cotton installation cavity. The side of the filter cotton installation cavity facing the second cover plate (4) has a filter cotton installation opening (203). The filter cotton installation opening (203) is used to put the filter cotton (202) into the filter cotton installation cavity. The side of the filter cotton installation cavity that is used to connect to the second connection opening (107) is provided with a first installation sidewall (204). The side of the filter cotton installation cavity that is used to connect to the second intermediate guide hole (303) is provided with a second installation sidewall (205). The first installation sidewall (204) is provided with a plurality of first oil discharge holes (206) that connect the filter cotton installation cavity and the guide space. The second installation sidewall (205) is provided with a plurality of second oil discharge holes (207) that connect the filter cotton installation cavity and the second intermediate guide hole (303).

8. The folding plate centrifugal oil mist separator as described in claim 7, characterized in that: It also includes a separator seal (5) for fixing to the air outlet of the oil mist separator; the separator seal (5) includes a sealing cylinder (503) for forming a sealing fit with the second annular flange (301), and the air outlet structure of the separator seal (5) is the central shaft hole of the sealing cylinder (503); the sealing fit structure between the central shaft hole of the second annular flange (301) and the sealing cylinder (503) includes a second spiral seal (304) and a labyrinth seal (504), the second spiral seal (304) is disposed on the second annular flange (301), and the labyrinth seal (504) is disposed on the sealing cylinder (503).

9. The folding plate centrifugal oil mist separator as described in claim 8, characterized in that: The inner circumferential surface of the second annular flange (301) includes a second conical surface (305) located near the end of the annular extension (302). The diameter of the second conical surface (305) near the end of the annular extension (302) is larger than the diameter of its other end. The outer circumferential surface of the sealing cylinder (503) is provided with an annular oil guide groove (505). The annular oil guide groove (505) is located on the side of the labyrinth seal (504) near the second conical surface (305). During assembly, the annular oil guide groove (505) is located in the inner region of the small diameter end of the second conical surface. The second end of the separation disc (1) has a second center positioning protrusion (118) at the shaft center. The second cover plate (4) is sleeved on the outer circumference of the second center positioning protrusion (118). The shaft center of the separation disc (1) is provided with a separation disc mounting shaft hole for the rotating power shaft (6) to pass through. The inner wall of the separation disc mounting shaft hole is provided with a transmission keyway at the end near the outer end face of the second center positioning protrusion (118).

10. The baffle centrifugal oil mist separator according to any one of claims 1 to 9, characterized in that: On the side of the second connecting opening (107) near the first connecting opening (105), a plurality of guide protrusions (108) are provided at intervals along the protrusion distribution line. The protrusion distribution line is consistent with the airflow guiding direction from the second guide cavity (103) to the third guide cavity (104). The width direction of the guide protrusions (108) is consistent with the width direction of the second guide cavity (103). The thickness of the guide protrusions (108) decreases in the direction from its top to its root.

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