A rotary flow channel type oil mist separator

Abstract

The present application relates to the field of gas purification equipment, and particularly relates to a rotating flow channel type oil mist separation device. The device comprises a shell, a separation rotor, a descending pipeline and an impeller. The descending pipeline is communicated with the gas inlet of the shell and passes through the separation rotor, and guides the oil mist containing airflow downward to the impeller. The side of the impeller facing the descending pipeline is open, so that the airflow entering the impeller moves to the outer peripheral side, and the heavier impurities are deviated to the outer peripheral side by using the inertia difference between the solid particles and the liquid drops and the airflow. The second end plate of the separation rotor is provided with an air inlet opening facing the impeller, and the airflow is folded upward into the separation rotor after passing through the impeller. The separation rotor is provided with a folded oil mist separation flow channel formed by the first flow channel section, the second flow channel section and the third flow channel section in sequence, so that the oil mist liquid drops collide with the flow guide assembly during the flow direction change and are separated. The present application can separate the heavier impurities before the airflow enters the separation rotor, and further realize the efficient separation of the oil mist liquid drops.

Description

Technical Field

[0001] This invention relates to the field of gas purification equipment, and more specifically to a rotary flow channel type oil mist separator. Background Technology

[0002] Machine tools, especially CNC machining centers, turning equipment, and milling equipment, typically use cutting fluids and lubricating oils to cool and lubricate the machining area during processing. During machining, the cutting fluid or lubricating oil easily forms oil mist due to high-speed motion, spraying, and the high-speed rotation of the workpiece and cutting tool, creating an oil-mist-laden airflow. If this oil mist is not treated, it can easily diffuse into the environment surrounding the machine tool, affecting the working environment and potentially adhering to equipment surfaces and other facilities.

[0003] Currently, oil mist generated by machine tools is usually treated by installing oil mist treatment equipment near the machine tool or by connecting multiple machine tools to a centralized exhaust system.

[0004] The method of installing oil mist treatment equipment near machine tools typically involves placing a suction and oil mist treatment device near the oil mist generation area of ​​the machine tool. This allows the generated oil mist to enter the oil mist treatment equipment before spreading and be treated by appropriate filtration, interception, or separation structures. This method can treat oil mist near its generation location. However, the oil mist treatment equipment needs to continuously process the oil-mist-containing airflow generated during machine tool processing. When the amount of oil mist generated is large, the treatment structure can easily withstand a significant processing load.

[0005] Another approach is to use a centralized exhaust system. Multiple machine tools are connected to a centralized exhaust system via exhaust ducts. The centralized exhaust system generates negative pressure, which then transports the oil mist-laden airflow from the multiple machine tools to a central processing unit. This method allows for the unified collection and treatment of oil mist from multiple machine tools, making it widely applicable in production workshops with multiple machine tools.

[0006] However, the oil mist airflow generated during machine tool processing may contain not only oil mist droplets but also solid particles such as metal chips and dust produced during cutting. Especially during metal processing, fine metal chips generated by the cutting tool can easily enter the oil mist treatment equipment or exhaust duct with the airflow.

[0007] When solid particles and oil mist droplets enter the oil mist treatment structure together, the solid particles easily mix with the oil, gradually forming a highly adhesive sludge-like fouling. This sludge-like fouling readily adheres to the surfaces of the filter structure, interception structure, flow guiding structure, and other mechanical components inside the oil mist treatment equipment, accumulating over time. The continuous accumulation of fouling not only reduces the effective flow area and processing capacity of the oil mist treatment structure but may also increase the operating resistance of the mechanical structure, affecting the normal operation of related moving parts and increasing the workload of equipment cleaning and maintenance.

[0008] In machine tool production workshops that use centralized exhaust systems, airflow containing oil mist and solid particles may be transported along long exhaust ducts before entering the downstream centralized processing equipment. During this transport process, oil mist and solid particles easily deposit on the inner walls of the ducts, forming oil stains and sludge. This not only increases the difficulty of cleaning the exhaust ducts but also increases the maintenance costs of the centralized exhaust system.

[0009] Therefore, it is necessary to install an oil mist capture device for the oil mist-containing airflow generated by machine tools, which can effectively treat the oil mist and mixed solid particles in the airflow before it enters the subsequent oil mist treatment structure, so as to reduce the adverse effects of oil mist and solid particles on the subsequent treatment structure and exhaust system. Summary of the Invention

[0010] The present invention aims to provide a rotary flow channel type oil mist separation device to solve the problems that the oil mist airflow generated during machine tool processing may be mixed with solid particles and large droplets, and that the solid particles are easy to form mud-like dirt after mixing with oil and adhering to the oil mist treatment structure, as well as the difficulty in taking into account the pre-separation of impurities and the capture of oil mist in the existing oil mist treatment process.

[0011] To achieve the above objectives, the present invention provides a rotary flow channel type oil mist separator, including a housing, a separator rotor disposed inside the housing, a descending pipe, an impeller, and a drive assembly for driving the separator rotor and the impeller to rotate; The housing is provided with an air inlet and an air outlet. The descending pipe is connected to the air inlet and extends along the axial direction of the separating rotor and passes through the separating rotor. The impeller is located directly below the outlet of the downcomer pipe, and the side of the impeller facing the downcomer pipe has an open air intake space to allow the oil mist airflow flowing out of the downcomer pipe to enter the impeller; The separating rotor includes a first end plate and a second end plate disposed opposite to each other, and a plurality of flow guiding components disposed between the first end plate and the second end plate and distributed at intervals along the circumference of the separating rotor. The second end plate is located below the first end plate and is provided with an air inlet opening facing the impeller. An oil mist separation flow channel is formed between adjacent flow guiding components. The oil mist separation channel includes a first channel section, a second channel section, and a third channel section connected in sequence along the airflow direction. The first channel section extends from the inside to the outside of the separation rotor. The second channel section is connected to the first channel section and extends toward the center of the separation rotor. The third channel section is connected to the second channel section and extends toward the outside of the separation rotor.

[0012] In some embodiments, the flow guiding assembly includes a main flow guide, an inertial trapping plate, and a deflecting flow guide; The main flow element extends outward along the inner side of the separating rotor, and the oil mist separation channel is formed between adjacent main flow elements; The inertial trapping plate is connected to one side of the main flow guide and extends into the flow channel space between adjacent flow guide components; The deflecting guide is connected to the other side of the main guide and extends into the flow channel space between adjacent guide components; The inertial trapping plate and the deflecting guide together define the second flow channel section.

[0013] In some embodiments, the deflecting guide includes a guide plate body and a deflecting plate body; The guide plate is disposed on the side of the main flow element near the center of the separating rotor and extends along the flow direction of the airflow in the first flow channel section to guide the airflow into the second flow channel section. The deflection plate extends into the flow channel space between adjacent flow guiding components and is disposed opposite to the inertial trapping plate to jointly define the second flow channel segment; The flow guide plate and the deflection plate are connected to each other at the end away from the main flow element.

[0014] In some embodiments, the inertial trapping plate extends from the main flow guide to the flow channel space between adjacent flow guide components, and the extension direction of the inertial trapping plate is deflected toward the center side of the separating rotor relative to the radial direction of the separating rotor, so that the airflow in the second flow channel section has a tendency to flow from the outside to the inside. An oil collection area is formed between the inertial trapping plate and the main flow element. After the oil mist droplets collide with the inertial trapping plate, they move along the inertial trapping plate under the centrifugal force of the separating rotor and collect in the oil collection area.

[0015] In some embodiments, from the first end plate to the second end plate, the connection position between the inertial trapping plate and the main flow element gradually moves away from the center of the separating rotor, so that when the oil in the oil collection area is subjected to centrifugal force, an axial component force is generated that flows toward the second end plate. The second end plate is provided with a drain hole, which is connected to the oil collection area so that the oil collected in the oil collection area can be discharged from the separating rotor.

[0016] In some embodiments, the flow guiding assembly further includes a third flow guiding element; The third flow guide is connected to the end of the inertial trap plate away from the main flow guide and extends along the outer side of the separating rotor to guide the airflow after passing through the second flow channel section into the third flow channel section. The outer end of the main flow element is positioned corresponding to the connection position of the inertial trapping plate and is connected to the inertial trapping plate to reduce the formation of a suspended structure at the outer end of the main flow element. The main flow guide, the inertial trapping plate, and the third flow guide are integrated into one unit.

[0017] In some embodiments, the downcomer, the impeller, and the separating rotor are arranged coaxially; The impeller is an open impeller, which includes a disk and a plurality of blades spaced apart circumferentially along the disk; the outer periphery of the impeller extends beyond the projection range of the downcomer pipe on the plane of the impeller. The impeller is used to move the airflow entering the impeller toward the outer periphery of the impeller, and to cause solid particles and droplets in the airflow to deflect relative to the airflow toward the outer periphery of the impeller under inertia.

[0018] In some embodiments, the impeller and the separating rotor are driven by separate drive components to adjust the rotational speeds of the impeller and the separating rotor, respectively.

[0019] In some embodiments, the descending pipe is fixedly connected to the separating rotor and serves as a rotating connector for the separating rotor; The descending pipe is rotatably mounted on the housing, and the descending pipe and the separating rotor are driven to rotate together by a drive assembly.

[0020] In some embodiments, an oil collecting structure is provided inside the housing, the oil collecting structure being located on the outer periphery of the separating rotor, for collecting the oil ejected by the separating rotor; The oil collection structure includes an oil collection trough located at the bottom of the housing and an oil discharge port communicating with the oil collection trough.

[0021] The rotary flow channel oil mist separator of the present invention, which applies the above-mentioned technical solution, has the following effects: This invention utilizes a descending duct between the air inlet of the housing and the separating rotor, with an impeller positioned below the outlet of the descending duct. This allows the oil-mist-laden airflow entering the device to first flow downwards along the descending duct, then change its motion state upon entering the impeller, and subsequently enter the separating rotor through the air inlet located below. Thus, an airflow path with descent, deflection, and re-entry into the separating rotor is formed before the airflow enters, providing a difference in motion state for components with different inertial characteristics within the airflow.

[0022] Furthermore, the impeller applies a rotational force to the incoming airflow, causing it to move towards the outer periphery of the impeller. Larger, more inertial solid particles and droplets in the airflow are less likely to change their motion with the airflow, thus making them more likely to deflect towards the outer periphery of the impeller and move away from the air inlet of the separator rotor located above the impeller. Therefore, the proportion of heavier solid particles and larger droplets entering the separator rotor before the oil mist airflow enters the separator rotor can be reduced. This reduces the likelihood of solid particles mixing with oil inside the separator rotor to form dirt that adheres to the separation structure, thereby reducing operational instability caused by impurity accumulation during the separator rotor's operation.

[0023] Based on this, the separating rotor employs multiple circumferentially spaced flow guide components, forming sequentially connected first, second, and third flow channel sections between adjacent flow guide components. This causes the airflow entering the separating rotor to flow outward, inward, and then outward again. During the multiple changes in airflow direction, oil mist droplets, due to inertia, cannot completely follow the airflow's direction of motion, thus colliding with the flow guide components and separating from the airflow. Consequently, the downcomer and impeller form a preliminary separation process for heavier impurities, while the separating rotor further separates the oil mist that enters with the airflow, forming a staged separation process from front to back.

[0024] Therefore, by coordinating the downcomer, impeller, and separation rotor with a deflector-type oil mist separation channel, the present invention reduces the amount of heavier solid particles and droplets entering the oil mist-containing airflow before it enters the separation rotor, and the separation rotor further achieves oil mist separation. This reduces the impact of impurities on the internal structure of the separation rotor while improving the overall separation effect of the oil mist-containing airflow.

[0025] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0026] Figure 1 This is a half-sectional schematic diagram of the rotary flow channel oil mist separator of the present invention; Figure 2 It is a three-dimensional view of the separated rotor section; Figure 3 This is a side sectional view of the separated rotor section; Figure 4 This is a top sectional view of the separated rotor; Figure 5 This is a segmented schematic diagram of the oil mist separation flow channel; Figure 6 This is a simulation result diagram of the airflow in the oil mist separation channel; Figure 7 It is a 3D view of a single flow guide component. Explanation of reference numerals in the attached figures

[0027] 1-Shell, 11-Air inlet, 12-Air outlet, 13-Oil collection structure; 2-Separate rotor; 21-First end plate; 22-second end plate, 221-drain hole; 23-Flow guiding component; 231-Main flow guiding component; 232-Inertial trapping plate; 233-Deflecting flow guiding component; 2331-Flow guiding plate body; 2332-Deflecting plate body; 234-Third flow guiding component; 2a-Oil mist separation channel, 2a1-First channel section, 2a2-Second channel section, 2a3-Third channel section; 3- Descent pipe; 4-Impeller. Detailed Implementation

[0028] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0029] In this invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the orientation in the assembled and used state. "Inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself. Rotary flow channel type oil mist separator (see attached) Figure 1 )

[0030] This invention provides a rotary flow channel oil mist separator for separating oil-mist-containing airflow generated during machine tool processing. The oil-mist-containing airflow may contain, in addition to air, oil mist droplets, larger oil droplets, and solid particles generated during processing, such as metal shavings. In this embodiment, the rotary flow channel oil mist separator primarily uses an impeller 4 to perform pre-stage inertial separation of the airflow entering the device, and further separates the oil mist droplets through a rotating flow channel formed inside the separation rotor 2.

[0031] The rotary flow channel type oil mist separator includes a housing 1, a separating rotor 2 disposed inside the housing 1, a descending pipe 3, an impeller 4, and a drive assembly for driving the corresponding rotating components. The housing 1 serves as the external load-bearing structure of the entire device, and its interior forms an airflow channel for the flow of oil mist-containing air. An air inlet 11 is provided at the upper part of the housing 1 for receiving the oil mist-containing airflow to be treated; an air outlet is also provided on the housing 1 for discharging the separated airflow from the device.

[0032] The descending pipe 3 is connected to the air inlet 11 of the housing 1 and extends downward along the axial direction of the separating rotor 2. The descending pipe 3 passes through the central region of the separating rotor 2, and its lower end forms the descending pipe 3 outlet, which is located below the separating rotor 2. Thus, the oil mist airflow entering the housing 1 does not directly enter the separating rotor 2, but is first guided by the descending pipe 3 to the lower region of the separating rotor 2.

[0033] Impeller 4 is positioned below and opposite the outlet of downcomer 3. The side of impeller 4 facing downcomer 3 has an open intake space, allowing the oil-mist-laden airflow flowing downwards from downcomer 3 to directly enter impeller 4. As impeller 4 rotates, it acts on the incoming airflow, causing it to move towards the outer periphery of impeller 4. Because the solid particles and larger droplets carried in the airflow have greater mass and inertia relative to air, these impurities are deflected outwards relative to the airflow during impeller 4 rotation, thus partially separating the heavier solid particles and droplets before they enter separator rotor 2.

[0034] The separating rotor 2 is positioned above and corresponding to the impeller 4. The separating rotor 2 includes a first end plate 21 and a second end plate 22 arranged axially opposite each other, with the second end plate 22 located below the first end plate 21. The second end plate 22 has an air inlet facing downwards towards the impeller 4, allowing airflow in the impeller 4 region to enter the separating rotor 2 from below. The separating rotor 2 also contains multiple circumferentially spaced guide components 23, forming an oil mist separation channel 2a between adjacent guide components 23. The airflow entering the separating rotor 2 flows along the oil mist separation channel 2a towards the outer periphery of the separating rotor 2, changing its flow direction multiple times within the channel, thereby separating the oil mist droplets from the airflow.

[0035] In this embodiment, the downcomer 3, impeller 4, and separator rotor 2 are preferably coaxially arranged, so that the downcomer 3 can extend downward along the central area of ​​the separator rotor 2, the impeller 4 is located directly below the separator rotor 2, and the air inlet of the separator rotor 2 is opposite to the impeller 4. Thus, a relatively clear axial air intake path is formed inside the entire device: the oil mist-containing airflow enters the downcomer 3 through the air inlet 11 at the upper part of the housing 1 and flows downward, enters the impeller 4 at the outlet of the downcomer 3, changes its motion state after being acted upon by the impeller 4 and turns upward, then enters the separator rotor 2 through the air inlet on the second end plate 22, and then flows outward along the oil mist separation channel 2a inside the separator rotor 2, and finally is discharged from the air outlet of the housing 1.

[0036] The impeller 4 and the separating rotor 2 have different functional focuses. The impeller 4 is mainly positioned in the airflow path before the oil mist-laden airflow enters the separating rotor 2. Through rotation, it deflects solid particles and larger droplets in the airflow to the outer periphery, reducing the direct entry of heavier impurities into the separating rotor 2. The separating rotor 2 mainly utilizes the oil mist separation channel 2a formed during its rotation to further separate the oil mist droplets that enter with the airflow. Through the above structural coordination, the oil mist-laden airflow undergoes different separation processes before and after entering the separating rotor 2.

[0037] The driving methods of the impeller 4 and the separating rotor 2 can be configured according to the specific structure of the device. In one embodiment, the impeller 4 and the separating rotor 2 are driven by independent drive components, allowing the rotational speeds of the impeller 4 and the separating rotor 2 to be adjusted separately. In another embodiment, the descending pipe 3 is fixedly connected to the separating rotor 2, and the descending pipe 3 also serves as a rotational connection structure for the separating rotor 2; the rotation of the descending pipe 3 drives the rotation of the separating rotor 2. All of the above different driving methods can achieve the rotational movement of the separating rotor 2, and the specific structures will be further explained later.

[0038] The housing 1 can also be equipped with an oil collecting structure 13 for collecting the separated oil. The oil collecting structure 13 can be set on the outer periphery of the separating rotor 2 and the bottom of the housing 1, so that the oil thrown out by the rotating separating rotor 2 and some of the droplets moving to the outer periphery under the action of the impeller 4 can be collected inside the housing 1 and discharged through the oil discharge structure set at the bottom of the housing 1.

[0039] In summary, the rotary flow channel oil mist separator of this embodiment uses the housing 1 to form an integral housing space. The downcomer 3 guides the oil mist-containing airflow from the air inlet 11 of the housing 1 to below the separator rotor 2. The impeller 4, located at the outlet of the downcomer 3, performs pre-separation of heavier particles and droplets in the airflow. The separator rotor 2, which enters from below, further separates the oil mist, thus forming an airflow and separation path created by the sequential cooperation of the downcomer 3, impeller 4, and separator rotor 2. The specific structures and working processes of the housing 1, downcomer 3, impeller 4, and separator rotor 2 will be described in detail below. Casing 1 (see attached) Figure 1 )

[0040] The housing 1 serves as the external supporting structure of the rotary flow channel oil mist separator, accommodating components such as the separator rotor 2, the descending pipe 3, and the impeller 4, and forming corresponding installation and airflow spaces within it. The specific shape of the housing 1 can be set according to actual installation conditions, and is not specifically limited in this embodiment.

[0041] The housing 1 is provided with an air inlet 11 and an air outlet 12. The air inlet 11 is connected to the downcomer pipe 3 and is used to introduce the oil mist airflow to be treated into the device. The air outlet 12 is connected to the airflow space downstream of the separator rotor 2 and is used to discharge the airflow after separation treatment.

[0042] The housing 1 has an internal mounting space for installing the separator rotor 2, which is located in the central region of the housing 1. A descending pipe 3 extends downwards from the air inlet 11 of the housing 1, passes through the area where the separator rotor 2 is located, and extends its lower end below the separator rotor 2. The descending pipe 3 can be connected to the housing 1 via a rotating connection structure such as a bearing, allowing the descending pipe 3 to rotate relative to the housing 1.

[0043] An airflow space is formed between the outer periphery of the separating rotor 2 and the housing 1, allowing the airflow processed by the separating rotor 2 to flow towards the air outlet 12 of the housing 1. The bottom of the housing 1 may also be provided with an oil collection structure 13 for collecting oil and other deposits generated during the separation process. The oil collection structure 13 may include an oil collection tank and an oil discharge port connected to the oil collection tank, so as to facilitate the centralized discharge of the collected oil.

[0044] In one embodiment, the housing 1 can be configured to be easy to open and disassemble, so as to facilitate maintenance and cleaning of the internal separating rotor 2, impeller 4, downcomer 3 and oil collection area at the bottom of the housing 1. Downflow pipe 3 structure (see attached) Figure 1 )

[0045] The descending pipe 3 is located inside the housing 1 and is connected to the air inlet 11 of the housing 1. It is used to guide the oil mist airflow entering through the air inlet 11 to the area below the separator rotor 2.

[0046] The descending pipe 3 extends along the axial direction of the separating rotor 2 and passes through the central region of the separating rotor 2. Its upper end is connected to the air inlet 11 of the housing 1, and its lower end forms the outlet of the descending pipe 3. The outlet of the descending pipe 3 is located below the separating rotor 2 and faces the impeller 4 located below it. During operation, the descending pipe 3 is vertically arranged, and the pipe wall of the descending pipe 3 forms a continuous airflow channel, allowing the incoming oil mist airflow to flow downward along the descending pipe 3.

[0047] In this embodiment, the descending pipe 3 is preferably coaxially arranged with the separating rotor 2, so that the descending pipe 3 can pass through the central region of the separating rotor 2 without occupying the oil mist separation channel 2a arranged circumferentially on the separating rotor 2. The cross-section of the descending pipe 3 can be circular or other suitable shapes, and the specific dimensions are set according to the required air flow rate and the structural dimensions of the separating rotor 2.

[0048] In one embodiment, the descending pipe 3 is fixedly connected to the separating rotor 2 and serves as a rotating connector for the separating rotor 2. The descending pipe 3 is mounted to the housing 1 via a rotating connection structure such as bearings, thereby enabling it to rotate relative to the housing 1 and drive the separating rotor 2 connected to it to rotate synchronously under the action of the drive assembly. By combining the connection structure between the descending pipe 3 and the separating rotor 2, the rotational drive of the separating rotor 2 can be achieved by utilizing the space formed by the descending pipe 3 passing through the center of the separating rotor 2. Impeller 4 (see attached) Figure 1 )

[0049] Impeller 4 is disposed inside housing 1, below descending pipe 3 and separating rotor 2, and is coaxially arranged with descending pipe 3 and separating rotor 2. Impeller 4 rotates around its own axis under the action of drive assembly.

[0050] It includes a disc and multiple blades spaced circumferentially along the disc. The disc of the impeller 4 is located on the lower end face of the impeller 4, and its upper end face is an open structure. The disc can also be conical to improve its guiding ability. The inner ends of the multiple blades are connected to the disc, and the inner ends are located within the projection range of the descending pipe 3. The outer end of the impeller 4 extends beyond the projection range of the descending pipe 3; preferably, the outer end of the impeller 4 extends beyond the projection range of the inlet of the separating rotor 2, so that impurities entering the impeller 4 can be thrown outwards and leave the inlet range of the separating rotor 2.

[0051] During operation, the oil mist-containing airflow flows downward along the downcomer 3 and directly enters the open intake space of the impeller 4 from the outlet of the downcomer 3. When the impeller 4 rotates, the blades act on the airflow entering the impeller 4, causing the airflow to move towards the outer periphery of the impeller 4. Since the air, oil mist droplets, and solid particles in the oil mist-containing airflow have different densities and masses, their motion states after being acted upon by the impeller 4 are also different. Among them, the air has a smaller mass and is more easily affected by the pressure gradient at different locations to leave the impeller 4 range, directly shifting upward into the separation rotor 2, or moving outward and then turning back obliquely upward into the separation rotor 2; while solid particles such as metal scraps and larger droplets have greater mass and inertia, and in the impeller 4, inertia is the dominant force. They are less affected by the airflow, and the radial force exerted by the impeller 4 on them is much greater than the force of the airflow. Therefore, they are more likely to shift towards the outer periphery of the impeller 4 than the airflow, and are eventually thrown out of the impeller 4.

[0052] Solid particles and heavier liquid droplets that deflect towards the outer periphery of the impeller 4 can further impact the inner wall of the housing 1, and lose velocity after the collision, depositing at the bottom of the housing 1. This pre-removal of heavier impurities is achieved before the oil mist-containing airflow enters the separator rotor 2. In particular, for solid particles such as metal shavings, the rotational motion generated by the impeller 4 can move them away from the air inlet of the separator rotor 2 located above the impeller 4, reducing the number of solid particles that directly enter the interior of the separator rotor 2.

[0053] In this embodiment, the impeller 4 is not primarily intended to improve the overall airflow carrying capacity, but rather to utilize the inertial difference between air and solid particles / droplets to cause larger impurities to deflect more significantly to the outer periphery relative to the airflow. The rotational speed of the impeller 4 can be adjusted according to factors such as the content and size of solid particles and droplets in the actual oil mist airflow to alter the degree of separation of heavier impurities. Separate rotor 2 (see attached) Figure 2-4 )

[0054] The separating rotor 2 is the main separation component of the rotary flow channel oil mist separator. It is located inside the housing 1 and above the impeller 4. Under the action of the drive assembly, the separating rotor 2 rotates around its own axis to further separate the oil mist-containing airflow after passing through the impeller 4 area. The impeller 4 is mainly used to deflect solid particles and larger droplets in the airflow to the outer periphery, while the separating rotor 2 is mainly used to capture and separate the oil mist droplets that still enter with the airflow. The two form a front-to-back separation structure within the device.

[0055] The separating rotor 2 has a rotating structure arranged around a central axis. Its central region serves as the area where airflow enters the separating rotor 2, and its outer peripheral region serves as the area where the separated airflow flows out. In this embodiment, the separating rotor 2 is located in the central region inside the housing 1, and an impeller 4 is arranged below it. An appropriate distance is maintained between the impeller 4 and the separating rotor 2 to provide sufficient installation and rotation space for the impeller 4, while avoiding excessive suction force on the impeller 4, thereby drawing solid impurities into the separating rotor 2.

[0056] The separating rotor 2 and the impeller 4 are preferably coaxial. The central axis of the separating rotor 2 coincides with the axis of the descending pipe 3 and the rotation axis of the impeller 4. The descending pipe 3 passes through the central region of the separating rotor 2 and extends to the impeller 4 below the separating rotor 2.

[0057] The separating rotor 2 includes a first end plate 21, a second end plate 22, and a plurality of flow guiding components 23 disposed between the first end plate 21 and the second end plate 22. The first end plate 21 and the second end plate 22 are arranged opposite each other along the axial direction of the separating rotor 2, wherein the second end plate 22 is located below the first end plate 21. The first end plate 21 and the second end plate 22 can respectively form the upper and lower support structures of the separating rotor 2, and the plurality of flow guiding components 23 are connected between the first end plate 21 and the second end plate 22 and are distributed at intervals along the circumference of the separating rotor 2.

[0058] The second end plate 22 is provided with an air inlet, which is located near the center of the separating rotor 2 and faces downward toward the impeller 4. The airflow generated by the impeller 4 enters the air inlet from below the second end plate 22 and then enters the oil mist separation channel 2a formed between adjacent guide components 23. Thus, the separating rotor 2 in this embodiment adopts a bottom-inlet structure, that is, the airflow enters from below the separating rotor 2.

[0059] Multiple flow guiding components 23 are circumferentially distributed around the air intake opening. Oil mist separation channels 2a are formed between adjacent flow guiding components 23, and each oil mist separation channel 2a is connected to the central region and the outer peripheral region of the separator rotor 2, respectively. After the airflow enters the separator rotor 2, it enters each oil mist separation channel 2a under the guidance of the flow guiding components 23, and flows from the inside to the outside of the separator rotor 2 along the oil mist separation channel 2a.

[0060] In this embodiment, the oil mist separation channel 2a does not extend in a straight line in a single direction, but is configured as a reversible channel with multiple directional changes. Along the airflow direction, the oil mist separation channel 2a sequentially includes a first channel section 2a1, a second channel section 2a2, and a third channel section 2a3. The first channel section 2a1 extends from the inside to the outside of the separating rotor 2, the second channel section 2a2 connects to the first channel section 2a1 and extends towards the center of the separating rotor 2, and the third channel section 2a3 extends again towards the outside of the separating rotor 2. Thus, an oil mist separation channel 2a with a relatively long actual flow path is formed within a limited radial space.

[0061] The flow guiding component 23 includes a main flow guiding component 231, an inertial trapping plate 232, and a deflecting flow guiding component 233.

[0062] The main flow element 231 extends outward from the inner side of the separating rotor 2 and serves as the main separation structure between adjacent oil mist separation channels 2a. The inertial trapping plate 232 and the deflecting guide element 233 are respectively connected to the main flow element 231 and extend into the channel space between adjacent guide assemblies 23, thereby forming a deflecting structure inside the channel. The main flow element 231 may have a front angle or a rear angle, or be configured as an arc surface; in the embodiment shown in the figures, it is a planar structure along the radial direction.

[0063] The main collection area is used to form oil mist droplets. When the airflow changes direction along the second flow channel section 2a2, the oil mist droplets, due to their own inertia, cannot completely follow the airflow to change direction, thus colliding with the inertial collection plate 232. The collected oil then moves along the inertial collection plate 232 towards the main flow element 231 and converges under the centrifugal force generated by the rotation of the separating rotor 2, thereby achieving the separation of oil mist droplets from the airflow.

[0064] The deflector 233 works in conjunction with the inertial trapping plate 232 to form the second flow channel section 2a2 and guides the airflow to flow back through the complete second flow channel section 2a2 before flowing outwards again towards the outside of the separating rotor 2. Through the cooperation between the main flow guide 231, the inertial trapping plate 232, and the deflector 233, a continuous first flow channel section 2a1, a second flow channel section 2a2, and a third flow channel section 2a3 are formed inside the separating rotor 2.

[0065] A space is maintained between the outer periphery of the separator rotor 2 and the housing 1 for the flow of air after separation. After passing through the oil mist separation channel 2a, the airflow is discharged from the outer periphery of the separator rotor 2 and enters the outer periphery airflow space inside the housing 1, and then is discharged from the air outlet 12 of the housing 1. The captured oil can be discharged through the drainage structure provided inside the separator rotor 2 and further collected in the oil collection structure 13 at the bottom of the housing 1.

[0066] Regarding the installation of the separating rotor 2, the separating rotor 2 can be installed inside the housing 1 through an independent rotary connection structure and driven to rotate by an independent drive assembly; alternatively, the separating rotor 2 can be fixedly connected to the descending pipe 3, with the descending pipe 3 also serving as the rotary connection structure for the separating rotor 2, and the drive assembly driving the descending pipe 3 to rotate the separating rotor 2. When the latter structure is adopted, the descending pipe 3 passes through the central region of the separating rotor 2 and is fixedly connected to the first end plate 21, the second end plate 22, or a connection structure located in the central region of the separating rotor 2, thereby achieving the rotational drive of the separating rotor 2 without additionally occupying the central space of the separating rotor 2.

[0067] Furthermore, the rotational speed of the separating rotor 2 can be adjusted according to actual processing requirements. When the rotational speed of the separating rotor 2 increases, its internal oil mist separation channel 2a also has a higher rotational speed, which can enhance the oil collection and separation process on the inertial collection plate 232; when it is necessary to reduce the airflow capacity or reduce energy consumption, the rotational speed of the separating rotor 2 can be appropriately reduced. Therefore, the separating rotor 2 not only undertakes the function of oil mist collection, but its rotational state also participates in the formation of the airflow driving force inside the device.

[0068] Through the above structure, the separating rotor 2 simultaneously undertakes the functions of oil mist separation, airflow guidance, and airflow drive, and is the core working component of the rotary flow channel type oil mist separator in this embodiment. The specific structure of the oil mist separation channel 2a inside the separating rotor 2 and each flow guiding component 23 will be further described later. Airflow enters separator rotor 2 (see attached) Figure 1-3 )

[0069] In this embodiment, the air intake position of the separating rotor 2 is located on its lower side, that is, the second end plate 22 is provided with an air intake opening facing the impeller 4. The air intake opening is located in the central region of the separating rotor 2 and is axially opposite to the impeller 4. The impeller 4 is located below the second end plate 22, and the rotation center of the impeller 4 coincides with the rotation center of the separating rotor 2, so that the airflow generated by the impeller 4 can directly enter the air intake opening of the separating rotor 2 from below.

[0070] The oil mist-laden airflow enters the downcomer duct 3 through the inlet 11 of the housing 1, flows axially downward within the downcomer duct 3, and enters the impeller 4 through the outlet of the downcomer duct 3. Since the air inlet of the separator rotor 2 is located above the impeller 4, the airflow needs to change its original downward direction after passing through the impeller 4 and turn upward back to the air inlet of the second end plate 22.

[0071] During the operation of the separating rotor 2, the internal airflow generated by the rotation of the separating rotor 2 creates a relatively low-pressure area in its central intake region. Since the intake opening of the second end plate 22 is directly opposite the impeller 4, this low-pressure area can exert a suction effect on the airflow in the impeller 4 region, causing the airflow in the impeller 4 to enter the separating rotor 2 from bottom to top.

[0072] During the rotation of impeller 4, the airflow is driven towards the outer periphery of impeller 4 by the blades. Therefore, the actual airflow does not necessarily enter the inlet opening vertically upwards directly from the center of impeller 4. Instead, it can first move outwards from the center of impeller 4, then converge inwards and turn upwards under the pressure gradient formed in the inlet area of ​​separator rotor 2, finally entering the inlet opening on the second end plate 22. The specific airflow trajectory can vary depending on factors such as the rotational speed of impeller 4, the rotational speed of separator rotor 2, and the size of the inlet opening.

[0073] Meanwhile, due to their larger mass, the solid particles and larger droplets in impeller 4 are primarily affected by the direct contact force and inertia of impeller 4, with relatively weak airflow influence. When the airflow changes from downward to upward in the impeller 4 region, these impurities are less likely to completely follow the airflow back, but are more easily driven by impeller 4 and maintain their original motion trend, shifting towards the outer periphery of impeller 4. Therefore, the impeller 4 region not only completes the change in airflow direction, but also utilizes the inertial differences between different substances to keep heavier impurities away from the air inlet of the separator rotor 2.

[0074] After passing through the impeller 4, the airflow converges again towards the central region of the separator rotor 2 under the influence of the pressure gradient, and enters the separator rotor 2 through the air inlet on the second end plate 22. After entering the separator rotor 2, the airflow flows from the central region to the outer periphery and enters the subsequent oil mist separation channel 2a. Oil mist separation channel 2a structure (see attached) Figure 4-6 )

[0075] Multiple flow guiding components 23 of the separator rotor 2 are arranged at circumferential intervals, and an oil mist separation channel 2a is formed between adjacent flow guiding components 23. The oil mist separation channel 2a extends from the central region of the separator rotor 2 to the outer periphery and is used to guide the oil mist-containing airflow entering through the air inlet of the second end plate 22 to flow to the outside of the separator rotor 2.

[0076] Along the actual flow direction of the airflow, the oil mist separation channel 2a sequentially includes a first channel section 2a1, a second channel section 2a2, and a third channel section 2a3.

[0077] The first flow channel section 2a1 is located on the side of the oil mist separation flow channel 2a close to the center of the separation rotor 2. Its entire structure extends from the inside to the outside of the separation rotor 2, so that the airflow entering the separation rotor 2 first moves to the outer periphery along the first flow channel section 2a1.

[0078] The second flow channel section 2a2 connects to the first flow channel section 2a1 and extends towards the center of the separating rotor 2, causing the airflow to be reversed after passing through the first flow channel section 2a1, changing from outward to inward movement. The third flow channel section 2a3 further connects to the second flow channel section 2a2 and extends outward again, causing the airflow to move outward again after passing through the second flow channel section 2a2. Thus, a reversing flow path from outward to inward and then outward is formed within the limited radial dimension of the separating rotor 2.

[0079] When the oil mist-laden airflow enters the first flow channel section 2a1, the airflow moves outward along the flow channel under the rotation of the separating rotor 2. Due to the mass and inertia of the oil mist droplets, their motion lags behind the airflow. When the airflow enters the second flow channel section 2a2 and changes direction, the oil mist droplets cannot completely follow the airflow and turn inward synchronously, thus colliding with the inertial trapping structure located in the second flow channel section 2a2.

[0080] After the oil mist droplets collide with the flow guiding component 23, they move outward under the centrifugal force generated by the rotation of the separating rotor 2 and converge along the corresponding collecting surface. As the droplets continue to converge, the small droplets gradually form larger oil and separate from the airflow. After passing through the second flow channel section 2a2, the remaining airflow enters the third flow channel section 2a3 and flows outward again towards the outside of the separating rotor 2, finally being discharged from the outer periphery of the separating rotor 2.

[0081] By setting up the aforementioned reversible oil mist separation channel 2a, the actual flow path of the airflow can be increased within the limited space of the separation rotor 2. Furthermore, the inertial separation effect generated by the airflow changing direction multiple times increases the chance of oil mist droplets colliding with the guide component 23. Simultaneously, the rotation of the separation rotor 2 itself provides a continuous centrifugal force to the collected oil, enabling it to move from the collection area to the corresponding convergence area, rather than remaining stagnant in the airflow channel for an extended period.

[0082] In this embodiment, each oil mist separation channel 2a can adopt the same or substantially the same structure and be uniformly or non-uniformly distributed along the circumference of the separation rotor 2. Multiple channels simultaneously divert the airflow entering the separation rotor 2, allowing the airflow to enter different channels for oil mist separation, thereby making full use of the circumferential space of the separation rotor 2. Inertial trap plate 232 (see attached) Figure 5-7 )

[0083] An inertial trapping plate 232 is disposed on each flow guiding component 23 and extends into the flow channel space between adjacent flow guiding components 23. The inertial trapping plate 232 is mainly located on one side of the second flow channel section 2a2, forming the second flow channel section 2a2 for airflow reversal together with the deflecting flow guide 233. Its main function is to collect oil mist droplets that fail to follow the airflow change direction in time during the change of airflow direction, and to make the collected oil converge in a predetermined direction.

[0084] One end of the inertial trap plate 232 is connected to the main flow guide 231, and the other end extends into the flow channel space between adjacent flow guide components 23.

[0085] The inertial trapping plate 232 does not extend directly along the radial direction of the separating rotor 2, but rather is deflected relative to the radial direction of the separating rotor 2. The angle between the extending direction of the inertial trapping plate 232 and the radial direction of the separating rotor 2 from the inside out is greater than 90° (see attached figure). Figure 5 (The angle β is marked in the figure). In other words, when the inertial trapping plate 232 extends from the main flow guide 231 to the flow channel space between the adjacent flow guide components 23, its extension direction is inclined inward relative to the tangential direction of the separation rotor 2, so that the inertial trapping plate 232 as a whole tends to converge toward the center of the separation rotor 2.

[0086] On the one hand, the inertial trap plate 232 can participate in changing the flow direction of the airflow in the second flow channel section 2a2. When the airflow enters the second flow channel section 2a2 from the first flow channel section 2a1, under the combined action of the inertial trap plate 232 and the deflection guide 233, the airflow gradually changes from outward flow to inward flow, causing the airflow to flow along a predetermined deflection path.

[0087] On the other hand, the inward-sloping structure of the inertial trapping plate 232 is beneficial for receiving and collecting the trapped oil. Since the separating rotor 2 is rotating, the oil on the inertial trapping plate 232 will be subject to centrifugal force and tend to move towards the outer periphery of the separating rotor 2. If the inertial trapping plate 232 extends outward in the radial direction, the oil easily moves outward along the surface of the inertial trapping plate 232 and detaches from the edge of the inertial trapping plate 232, making it difficult to form a stable collection.

[0088] In this embodiment, the inertial trapping plate 232 is inclined toward the center of the separating rotor 2, so that the surface of the inertial trapping plate 232 has a certain angle with respect to the centrifugal direction. When the oil is subjected to centrifugal force, the centrifugal force forms a component force in the direction of the surface of the inertial trapping plate 232 that drives the oil to move, and at the same time forms a component force in the direction perpendicular to the surface of the inertial trapping plate 232 that causes the oil to adhere to the inertial trapping plate 232. This allows the oil to move along the surface of the inertial trapping plate 232 toward the main flow member 231, instead of directly detaching from the edge of the inertial trapping plate 232.

[0089] Specifically, an oil collection area is formed between the inertial trapping plate 232 and the main flow element 231. When the oil mist-containing airflow passes through the second flow channel section 2a2, the oil mist droplets, due to their own inertia, cannot completely follow the airflow to complete the directional change and will collide with the surface of the inertial trapping plate 232. After colliding with the inertial trapping plate 232, the oil mist droplets gradually gather on the surface of the inertial trapping plate 232 to form a liquid film or larger oil droplets. Subsequently, under the action of the centrifugal force generated by the rotation of the separating rotor 2, the collected oil moves along the surface of the inertial trapping plate 232 towards the side closer to the main flow element 231, and finally enters the oil collection area formed between the inertial trapping plate 232 and the main flow element 231.

[0090] Furthermore, to facilitate the axial discharge of oil, the connection position between the inertial trapping plate 232 and the main flow guide 231 is inclined along the axial direction of the separating rotor 2. Specifically, from the first end plate 21 to the second end plate 22, the connection position between the inertial trapping plate 232 and the main flow guide 231 gradually moves away from the center of the separating rotor 2 (see attached diagram). Figure 3 The angle α marked in the figure causes the oil collection area to tilt along the axial direction.

[0091] Due to the aforementioned inclined structure, when the oil is subjected to centrifugal force, in addition to generating a component force moving in the radial direction, it can also generate an axial component force toward the second end plate 22, so that the oil collected in the oil collection area can gradually move toward the second end plate 22.

[0092] When the oil moves to the vicinity of the second end plate 22, it can be discharged from the separator rotor 2 through the drain hole 221 provided on the second end plate 22 and enter the oil collection structure 13 inside the housing 1 to achieve continuous collection of oil.

[0093] The aforementioned inertial trapping plate 232 structure enables oil mist droplets to be effectively collected during the flow channel turning process. At the same time, the centrifugal force of the separation rotor 2 is used to achieve directional collection of oil, avoiding the oil that has been captured in the traditional interception structure from migrating with the airflow or detaching from the trapping surface again, thereby improving the stability of the oil mist capture process. 233 structure of deflector guide (see attached) Figure 5-7 )

[0094] The deflecting guide 233 is disposed in the guide assembly 23 and connected to the side of the main guide 231 away from the inertial trap plate 232. The deflecting guide 233 extends toward the flow channel space between adjacent guide assemblies 23 and together with the inertial trap plate 232 defines a second flow channel segment 2a2, which is used to guide the airflow to change direction within the oil mist separation flow channel 2a.

[0095] The main function of the deflecting guide 233 is to prevent the airflow entering from the first flow channel section 2a1 from flowing directly around the inertial trap plate 232 in the original direction. Instead, it is constrained by the deflecting guide 233 and enters the second flow channel section 2a2, completing the deflecting flow from the outside to the inside along the second flow channel section 2a2.

[0096] Specifically, the deflecting guide 233 includes a guide plate 2331 and a deflecting plate 2332.

[0097] Guide plate 2331: The guide plate 2331 is disposed on the side of the main flow element 231 near the center of the separating rotor 2, and extends along the flow direction of the airflow in the first flow channel section 2a1. Since the guide plate 2331 is located at the transition position between the first flow channel section 2a1 and the second flow channel section 2a2, when the oil mist-containing airflow enters the oil mist separation flow channel 2a, it is first guided by the guide plate 2331, causing the airflow to enter the starting area of ​​the second flow channel section 2a2.

[0098] The guide plate 2331 is not used to directly block the airflow, but to limit the transition position from the first flow channel section 2a1 to the second flow channel section 2a2, so that the airflow can enter the area between the inertial trapping plate 232 and the deflecting guide 233 according to the preset path, and avoid the airflow directly bypassing the inertial trapping area after entering the separation rotor 2.

[0099] Deflection plate 2332: The deflection plate 2332 is disposed on the side of the guide plate 2331 away from the center of the separating rotor 2, and extends into the flow channel space formed between adjacent guide components 23. The deflection plate 2332 is disposed opposite to the inertial trapping plate 232, and a second flow channel section 2a2 is formed between the two.

[0100] In this embodiment, the deflector plate 2332 and the inertial trapping plate 232 are arranged substantially parallel to each other, so that the second flow channel section 2a2 forms a relatively continuous flow channel structure. After the airflow enters the second flow channel section 2a2, it flows within the space jointly defined by the inertial trapping plate 232 and the deflector plate 2332, and moves in a direction from the outside to the inside.

[0101] Because the deflector plate 2332 is connected to the main flow element 231, and its connection position is closer to the center of the separating rotor 2 relative to the inertial trap plate 232, the deflector plate 2332 can form the guide wall near the inner side of the second flow channel section 2a2, while the inertial trap plate 232 forms the flow channel wall near the outer side of the second flow channel section 2a2. Through this positional relationship, the airflow must pass through the corresponding area of ​​the inertial trap plate 232 before it can continue flowing towards the third flow channel section 2a3.

[0102] Furthermore, the ends of the guide plate 2331 and the deflector plate 2332 furthest from the main flow element 231 are connected to each other, forming a continuous structure for the deflector guide element 233. This connection method can reduce the formation of a suspended structure at the end of the deflector guide element 233, improve the structural stability of the deflector guide element 233 under the action of high-speed rotating airflow, and reduce vibration and noise caused by airflow disturbance during operation.

[0103] During the oil mist separation process, the oil mist-laden airflow enters the first flow channel section 2a1 and then enters the second flow channel section 2a2 under the action of the guide plate 2331. Since the second flow channel section 2a2 is jointly defined by the deflection plate 2332 and the inertial trapping plate 232, the airflow flows along the second flow channel section 2a2 towards the center of the separation rotor 2. When the airflow direction changes, the oil mist droplets, due to inertia, cannot completely follow the airflow to complete the change of direction. Therefore, they collide with the inertial trapping plate 232 located outside the second flow channel section 2a2 and are captured by the inertial trapping plate 232.

[0104] After passing through the second flow channel section 2a2, the airflow continues into the third flow channel section 2a3 and flows towards the outside of the separator rotor 2, eventually leaving the oil mist separator flow channel 2a.

[0105] Through the aforementioned deflector 233 structure, on the one hand, the airflow can be continuously guided, so that the airflow forms a complete deflection path along the first flow channel section 2a1, the second flow channel section 2a2, and the third flow channel section 2a3; on the other hand, it can limit the airflow to pass through the corresponding area of ​​the inertial trapping plate 232, thereby increasing the contact probability between the oil mist droplets and the inertial trapping plate 232 and achieving effective capture of oil mist particles. Third guide component 234 (see attached) Figure 5-7 )

[0106] To further optimize the structural stability of the flow guiding component 23 under high-speed rotation, the flow guiding component 23 is also provided with a third flow guiding element 234.

[0107] The third guide member 234 is connected to the end of the inertial trap plate 232 away from the main flow member 231 and extends along the outer side of the separating rotor 2. The third guide member 234 is located at the transition position between the second flow channel section 2a2 and the third flow channel section 2a3, and is used to guide the airflow after passing through the second flow channel section 2a2 into the third flow channel section 2a3.

[0108] Specifically, the airflow after passing through the second flow channel section 2a2 has completed the directional change from outside to inside and needs to flow further towards the outside of the separation rotor 2. Since the flow direction of the third flow channel section 2a3 is different from that of the second flow channel section 2a2, a third guide member 234 is provided to form a continuous transition structure between the end of the second flow channel section 2a2 and the third flow channel section 2a3, so as to avoid large flow disturbances in the airflow at the flow channel connection position.

[0109] The third guide member 234 is connected to the inertial trapping plate 232, forming a closed or supported structure at the end of the inertial trapping plate 232 away from the main guide member 231. Compared to the structure where the end of the inertial trapping plate 232 is directly suspended, the third guide member 234 in this embodiment can provide support for the end of the inertial trapping plate 232, thereby improving the overall rigidity of the inertial trapping plate 232.

[0110] Since the separating rotor 2 rotates at high speed during operation, the flow guiding assembly 23 is continuously subjected to the aerodynamic force generated by the rotation. If the end of the inertial trapping plate 232 forms a long cantilever structure, it is prone to elastic vibration under the action of airflow disturbance, which will not only reduce the structural stability, but may also generate additional operating noise.

[0111] By setting a third guide member 234 at the end of the inertial trapping plate 232, a continuous connection structure is formed between the end of the inertial trapping plate 232 and the third guide member 234, thereby shortening the free overhang length of the inertial trapping plate 232 and improving the ability of the inertial trapping plate 232 to resist airflow disturbance.

[0112] Furthermore, to reduce the problem of the outer end of the main flow component 231 being suspended, the outer end of the main flow component 231 is provided at the connection position with the inertial trapping plate 232 and is connected to the inertial trapping plate 232.

[0113] Specifically, the main flow element 231 extends from the inside to the outside of the separating rotor 2, with its outer end close to the connection area between the inertial trapping plate 232 and the main flow element 231. By connecting the outer end of the main flow element 231 to the inertial trapping plate 232, the outer end of the main flow element 231 no longer forms a separate cantilever structure.

[0114] The aforementioned connections create a mutually supporting overall structure among the main flow guide 231, the inertial trap plate 232, and the third flow guide 234. On one hand, the inertial trap plate 232 provides support for the outer end of the main flow guide 231, reducing the swaying of the end of the main flow guide 231 under the action of rotating airflow; on the other hand, the third flow guide 234 enhances the structural strength of the end of the inertial trap plate 232, making the entire flow guide assembly 23 form a more stable frame structure.

[0115] Furthermore, the third flow guide 234 and the inertial trapping plate 232 can be integrally formed. For example, the third flow guide 234 and the inertial trapping plate 232 can be formed into a continuous plate structure by sheet metal bending, so that they can maintain a stable connection without additional connecting structures.

[0116] With the above structure, the flow guiding component 23 can not only continuously guide the airflow direction in the oil mist separation channel 2a, but also reduce the noise caused by structural vibration during high-speed rotation and improve the operational reliability of the separation rotor 2.

[0117] Furthermore, since multiple flow guiding components 23 are typically arranged along the circumferential direction of the separating rotor 2, and there is a repeating structure between adjacent flow guiding components 23, the structural stability of the entire separating rotor 2 can be improved simultaneously by performing the above-mentioned stability optimization on a single flow guiding component 23. Impurities discharge (see attached) Figure 1 )

[0118] The oil collected in the separator rotor 2: After being captured by the inertial collecting plate 232, the oil mist droplets gradually converge under the rotation of the separator rotor 2 and are discharged through the drainage structure set by the separator rotor 2 itself. At the same time, the oil that does not directly converge on the inertial collecting plate 232 but is thrown to the outer periphery by the separator rotor 2 is collected by the oil collecting structure 13 inside the housing 1.

[0119] Inside the separating rotor 2, an oil collection area is formed between the inertial trapping plate 232 and the main flow guide 231. Oil mist droplets adhere to the inertial trapping plate 232 and, under centrifugal force, move along the inertial trapping plate 232 towards the main flow guide 231, entering the oil collection area. To facilitate further discharge of oil towards the second end plate 22 of the separating rotor 2, the connection position between the inertial trapping plate 232 and the main flow guide 231 can gradually move away from the center of the separating rotor 2 from the first end plate 21 to the second end plate 22, causing the centrifugal force to form an axial component in this direction, thereby pushing the collected oil towards the second end plate 22.

[0120] The second end plate 22 is provided with a drain hole 221, which is connected to the oil collection area. The oil collected in the oil collection area flows to the second end plate 22 in the corresponding direction and is discharged from the separator rotor 2 through the drain hole 221. The discharged oil can further fall into the oil collection area at the bottom of the housing 1.

[0121] To prevent the oil ejected from the separator rotor 2 from being directly discharged through the exhaust port, the exhaust port is offset from the bottom of the separator rotor 2, and the lowest point of the exhaust port is higher than the bottom of the separator rotor 2.

[0122] Impeller 4 drives the ejected impurities; when the impeller 4 separates solid particles and heavier droplets in the oil mist gas flow, some impurities thrown towards the outer periphery of the impeller 4 can also impact the inner wall of the casing 1 and deposit at the bottom. Therefore, the oil collection tank at the bottom of the casing 1 can also collect some of the droplets and other deposits separated by the impeller 4. For applications with a large number of solid particles, a detachable structure for easy cleaning of deposits can be installed at the oil collection tank as needed.

[0123] An oil collecting structure 13 is provided inside the housing 1 on the outer periphery of the separating rotor 2 to collect the oil thrown out during the rotation of the separating rotor 2. The oil collecting structure 13 may include an oil collecting trough located at the bottom of the housing 1 and an oil drain port communicating with the oil collecting trough. The oil thrown out from the outer periphery of the separating rotor 2 adheres to the inner wall of the housing 1 and flows downward, eventually collecting in the oil collecting trough and being discharged through the oil drain port.

[0124] With the above configuration, a continuous drainage path is formed inside the device, where the oil inside the separator rotor 2 is collected and discharged, and the oil on the outer periphery of the housing 1 is collected. This allows the captured oil to be removed from the oil mist separation channel 2a in a timely manner, reducing the possibility of the oil re-entering the airflow. Drive method for separating rotor 2 and impeller 4 (see attached document) Figure 1 )

[0125] Both the impeller 4 and the separator rotor 2 are rotating components, and their driving methods can be either independent or linked, depending on the specific structure.

[0126] Independent Drive: The impeller 4 and the separating rotor 2 are each driven by an independent drive assembly. The impeller 4 is driven by a first drive assembly, and the separating rotor 2 is driven by a second drive assembly. The two drive assemblies are respectively connected to the impeller 4 and the separating rotor 2 for transmission. With this configuration, the rotational speeds of the impeller 4 and the separating rotor 2 can be adjusted separately, thereby adjusting the separation effect of the impeller 4 on solid particles and larger droplets, and the separation effect of the separating rotor 2 on oil mist droplets.

[0127] When using the aforementioned independent drive method, since the descending pipe 3 needs to pass through the separating rotor 2 along the axial direction of the separating rotor 2, the descending pipe 3 will occupy the central axial space of the separating rotor 2. Therefore, when the separating rotor 2 needs to be driven by the central drive shaft, the descending pipe 3 will cause spatial interference with the conventional central drive shaft.

[0128] To address the aforementioned issues, in one embodiment, the descending pipe 3 can be fixedly connected to the separating rotor 2, making the descending pipe 3 simultaneously a rotating connector of the separating rotor 2. In this case, the descending pipe 3 is mounted to the housing 1 via a rotating connection structure such as bearings, allowing the descending pipe 3 to rotate relative to the housing 1. It is then connected to the prime mover used to drive the separating rotor 2 via a transmission mechanism. When the prime mover drives the descending pipe 3 to rotate, the descending pipe 3 synchronously drives the separating rotor 2, which is fixedly connected to it, to rotate. Using this structure, the descending pipe 3, which would otherwise need to pass through the central region of the separating rotor 2, can directly undertake the rotational transmission function of the separating rotor 2, eliminating the need for a separate drive shaft penetrating the center of the separating rotor 2 inside the descending pipe 3.

[0129] In another embodiment, the separating rotor 2 can also be driven to rotate by a rotary connection structure and a corresponding transmission mechanism located at other positions of the separating rotor 2. For example, the drive connection structure can be provided on the outer periphery of the separating rotor 2, the end plate side, or other positions that do not spatially interfere with the descending pipe 3. In this case, the descending pipe 3 does not need to participate in the rotation of the separating rotor 2; the descending pipe 3 can be directly fixedly installed on the housing 1 and is only used to guide the oil mist gas flow downward.

[0130] Linkage Drive: The impeller 4 and the separating rotor 2 can be interconnected, enabling them to rotate synchronously. Both impeller 4 and separating rotor 2 are driven simultaneously by the same drive assembly. Specifically, a connecting member can be installed between the impeller 4 and the separating rotor 2, establishing a fixed rotational connection. The drive assembly is then connected to either the impeller 4 or the separating rotor 2 via a transmission connection. When the drive assembly drives one rotating component, the other is simultaneously driven to rotate via the connecting member. This structure reduces the number of prime movers and their associated drive structures, resulting in a more compact device structure.

[0131] In this embodiment, different drive structures can be selected according to actual needs: when it is necessary to adjust the speed of impeller 4 and separation rotor 2 separately, two independent drive components can be used; when separation rotor 2 is driven by the center position and the descending pipe 3 occupies the center position, the descending pipe 3 can be fixedly connected to separation rotor 2, and the descending pipe 3 can also serve as a rotating connector of separation rotor 2; when it is not necessary to adjust the speed of the two separately, the impeller 4 and separation rotor 2 can be connected to each other, and a single drive component can be used to drive the two synchronously. Work process

[0132] When the rotary flow channel oil mist separator is working, the airflow containing oil mist droplets and any solid particles that may be present first enters the downcomer pipe 3 through the air inlet 11 of the housing 1. The downcomer pipe 3 extends along the axial direction of the separator rotor 2 and guides the airflow into the device downward, so that the airflow continues to move downward after passing through the central area of ​​the separator rotor 2, and enters the impeller 4 located below it through the outlet of the downcomer pipe 3.

[0133] The airflow entering impeller 4 is rotated by the blades and tends to move towards the outer periphery of impeller 4. Because solid particles and larger droplets in the airflow have greater mass and inertia relative to air, their motion is primarily driven by the direct force and inertia of impeller 4, and they are not easily altered by the airflow. Therefore, during the rotation of impeller 4, solid particles and heavier droplets are deflected towards the outer periphery of impeller 4 relative to the airflow, and can collide with the inner wall of casing 1 in the outer periphery region of impeller 4, subsequently depositing towards the bottom of casing 1 under gravity. Thus, impeller 4 pre-separates heavier impurities before the airflow enters the separating rotor 2.

[0134] After passing through the impeller 4, the airflow is deflected upwards by the pressure gradient formed in the intake area of ​​the separator rotor 2, and enters the separator rotor 2 through the intake opening on the second end plate 22. Since the second end plate 22 is located on the lower side of the separator rotor 2 and the intake opening faces the impeller 4, the airflow undergoes downward flow guided by the descending pipe 3, rotational motion in the impeller 4 area, and upward deflection motion before entering the separator rotor 2.

[0135] After entering the separator rotor 2, the airflow enters the circumferentially distributed oil mist separation channel 2a from the central region of the separator rotor 2, and sequentially passes through the first channel section 2a1, the second channel section 2a2, and the third channel section 2a3. In the first channel section 2a1, the airflow moves outward from the separator rotor 2; in the second channel section 2a2, the flow direction changes and moves towards the center of the separator rotor 2; and then in the third channel section 2a3, it moves outward again, thus forming a reversible flow path.

[0136] When the airflow changes direction in the second flow channel section 2a2, the oil mist droplets remaining in the airflow cannot completely follow the airflow change direction due to inertia. As a result, some oil mist droplets collide with the inertial trap plate 232 and adhere to its surface. As the separating rotor 2 continues to rotate, the oil adhering to the inertial trap plate 232 is subjected to centrifugal force and moves along the inertial trap plate 232 towards the main flow element 231, gradually converging into the oil collection area.

[0137] The collected oil can continue to move towards the second end plate 22 along the inertial trapping plate 232 and related guide structures, and be discharged from the separator rotor 2 through the drain hole 221 on the second end plate 22. At the same time, some oil is carried to the outer periphery of the separator rotor 2 during the airflow process, and is thrown out to the inner wall of the housing 1 under the rotation of the separator rotor 2. Then it flows down along the inner wall of the housing 1 and collects in the oil collection tank at the bottom of the housing 1, and can finally be discharged through the drain port.

[0138] After being processed by the oil mist separation channel 2a, most of the solid particles, heavier droplets, and oil mist droplets contained in the airflow have been separated. The airflow flows out from the outer periphery of the separation rotor 2 and enters the outer periphery airflow space inside the housing 1, and is finally discharged from the air outlet 12 of the housing 1.

[0139] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A rotary flow channel type oil mist separator, characterized in that, It includes a housing (1), a separating rotor (2) disposed inside the housing (1), a descending pipe (3), an impeller (4), and a drive assembly for driving the separating rotor (2) and the impeller (4) to rotate; The housing (1) is provided with an air inlet (11) and an air outlet. The descending pipe (3) is connected to the air inlet (11) and extends along the axial direction of the separating rotor (2) and passes through the separating rotor (2). The impeller (4) is located directly below the outlet of the downcomer pipe (3). The side of the impeller (4) facing the downcomer pipe (3) has an open air intake space so that the oil mist airflow flowing out of the downcomer pipe (3) can enter the impeller (4). The separating rotor (2) includes a first end plate (21) and a second end plate (22) disposed opposite to each other, and a plurality of flow guiding components (23) disposed between the first end plate (21) and the second end plate (22) and distributed circumferentially along the separating rotor (2). The second end plate (22) is located below the first end plate (21), and the second end plate (22) is provided with an air inlet opening facing the impeller (4). An oil mist separation channel (2a) is formed between adjacent flow guiding components (23). The oil mist separation channel (2a) includes a first channel section (2a1), a second channel section (2a2), and a third channel section (2a3) connected in sequence along the airflow direction. The first channel section (2a1) extends from the inside to the outside of the separation rotor (2). The second channel section (2a2) is connected to the first channel section (2a1) and extends toward the center of the separation rotor (2). The third channel section (2a3) is connected to the second channel section (2a2) and extends toward the outside of the separation rotor (2).

2. The rotary flow channel oil mist separator according to claim 1, characterized in that, The flow guiding component (23) includes a main flow guiding component (231), an inertial trapping plate (232), and a deflecting flow guiding component (233). The main flow element (231) extends outward along the inner side of the separating rotor (2), and the oil mist separation channel (2a) is formed between adjacent main flow elements (231). The inertial trap plate (232) is connected to one side of the main flow guide (231) and extends into the flow channel space between adjacent flow guide components (23); The deflecting guide (233) is connected to the other side of the main guide (231) and extends into the flow channel space between adjacent guide components (23); The inertial trapping plate (232) and the deflecting guide (233) together define the second flow channel section (2a2).

3. The rotary flow channel type oil mist separator according to claim 2, characterized in that, The deflecting guide (233) includes a guide plate (2331) and a deflecting plate (2332); The guide plate (2331) is located on the side of the main flow element (231) near the center of the separation rotor (2) and extends along the flow direction of the airflow in the first flow channel section (2a1) to guide the airflow into the second flow channel section (2a2). The deflection plate (2332) extends into the flow channel space between adjacent flow guiding components (23) and is disposed opposite to the inertial trapping plate (232) to jointly define the second flow channel section (2a2). The flow guide plate (2331) and the deflection plate (2332) are connected to each other at the end away from the main flow guide (231).

4. The rotary flow channel oil mist separator according to claim 2, characterized in that, The inertial trapping plate (232) extends from the main flow element (231) into the flow channel space between adjacent flow guiding components (23), and the extension direction of the inertial trapping plate (232) is deflected toward the center side of the separation rotor (2) relative to the radial direction of the separation rotor (2), so that the airflow in the second flow channel section (2a2) has a tendency to flow from the outside to the inside; An oil collection area is formed between the inertial trapping plate (232) and the main flow element (231). After the oil mist droplets collide with the inertial trapping plate (232), they move along the inertial trapping plate (232) under the centrifugal force of the separating rotor (2) and collect in the oil collection area.

5. The rotary flow channel oil mist separator according to claim 4, characterized in that, From the first end plate (21) to the second end plate (22), the connection position of the inertial trapping plate (232) and the main flow element (231) gradually moves away from the center of the separating rotor (2), so that when the oil in the oil collection area is subjected to centrifugal force, an axial component force is generated flowing toward the second end plate (22); The second end plate (22) is provided with a drain hole (221), which is connected to the oil collection area so that the oil collected in the oil collection area is discharged from the separator rotor (2).

6. The rotary flow channel type oil mist separator according to claim 2, characterized in that, The flow guiding component (23) also includes a third flow guiding element (234); The third guide (234) is connected to the end of the inertial trap plate (232) away from the main guide (231) and extends along the outer side of the separating rotor (2) to guide the airflow after passing through the second flow channel section (2a2) into the third flow channel section (2a3). The outer end of the main flow element (231) is connected to the inertial trapping plate (232) at the corresponding connection position, and is connected to the inertial trapping plate (232) to reduce the formation of a suspended structure at the outer end of the main flow element (231). The main flow guide (231), the inertial trapping plate (232), and the third flow guide (234) are integrated into one unit.

7. The rotary flow channel type oil mist separator according to claim 1, characterized in that, The descending pipe (3), the impeller (4), and the separating rotor (2) are arranged coaxially; The impeller (4) is an open impeller (4), which includes a disk and a plurality of blades spaced apart along the circumference of the disk; the outer periphery of the impeller (4) extends beyond the projection range of the descending pipe (3) on the plane where the impeller (4) is located; The impeller (4) is used to move the airflow entering the impeller (4) toward the outer periphery of the impeller (4) and to cause solid particles and droplets in the airflow to deflect relative to the airflow toward the outer periphery of the impeller (4) under inertial action.

8. The rotary flow channel type oil mist separator according to claim 7, characterized in that, The impeller (4) and the separating rotor (2) are driven by independent drive components to adjust the rotational speed of the impeller (4) and the separating rotor (2) respectively.

9. The rotary flow channel type oil mist separator according to claim 1, characterized in that, The descending pipe (3) is fixedly connected to the separating rotor (2) and serves as a rotating connector of the separating rotor (2); The descending pipe (3) is rotatably mounted on the housing (1), and the descending pipe (3) and the separating rotor (2) are driven to rotate by the drive assembly.

10. The rotary flow channel type oil mist separator according to claim 1, characterized in that, The housing (1) is provided with an oil collection structure (13), which is located on the outer periphery of the separating rotor (2) and is used to collect the oil thrown out by the separating rotor (2). The oil collection structure (13) includes an oil collection trough located at the bottom of the housing (1) and an oil discharge port connected to the oil collection trough.

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