An oil mist collector based on the Coanda effect

Abstract

The utility model discloses an oil mist collector based on the conda effect, including the shell structure, be equipped with the air inlet port and the exhaust port on this shell structure, install the filter cartridge at the exhaust port outer port, in the shell structure inside, along the air inlet direction of mixed gas, be provided with the first filter mechanism and the secondary filter mechanism for carrying out filter processing to mixed gas, centrifugal separation mechanism for carrying out centrifugal separation operation to the oil mist in mixed gas and the driving motor of power supply in proper order, wherein, the output shaft of driving motor is coaxial connection secondary filter mechanism and centrifugal separation mechanism, and through driving motor can drive secondary filter mechanism and centrifugal separation mechanism and rotate. The utility model has realized the synergistic effect of multistage filtration, centrifugal separation and airflow optimization, formed " inhale rough filter precision filter centrifugal separation equal flow purification " complete processing link, has guaranteed to mixed gas high efficiency, stable processing.

Description

Technical Field

[0001] This utility model belongs to the field of oil mist separation equipment, specifically, it relates to an oil mist collector based on the Coanda effect. Background Technology

[0002] In industrial settings such as machining and spraying, the direct emission of oil mist mixtures generated during equipment operation can not only pollute the working environment and endanger the health of operators, but may also cause equipment malfunctions due to oil mist deposition.

[0003] In the traditional structure of existing oil mist collectors, most devices place the filter screen in front of the centrifugal separator, intending to intercept large oil mist particles first. However, this design has significant drawbacks: single-layer filters, due to their large pore size and lack of a staged filtration mechanism, are ineffective at filtering submicron-sized oil mist particles. Especially when large impurities adhere, the filter screen becomes clogged rapidly, leading to a sharp increase in the processing load of the subsequent centrifugal separation module. Secondly, devices using traditional structures also face the problem of unreasonable airflow organization: due to the lack of a scientifically designed flow guide between the air inlet and the filter components, the gas flow after entering the device is turbulent, not only causing excessive filtration load on local filters but also allowing some oil mist to escape short-circuit with the airflow without being fully treated. In addition, although centrifugal separators can separate oil mist by generating centrifugal force through rotation, direct contact with impurities in the mixed gas easily leads to impeller wear and rapid oil accumulation; and traditional filters, due to their limited filtration efficiency, require frequent replacement of consumables, further increasing maintenance costs and operational complexity. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model aims to provide an oil mist collector based on the Coanda effect to optimize the gas flow field and combine it with an integrated suction and filtration structure to improve the efficiency of oil mist collection, reduce the frequency of consumable replacement, and thus achieve efficient oil mist treatment and low maintenance costs.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] An oil mist collector based on the Coanda effect includes a housing structure with an air inlet and an exhaust port for the entry and exit of a mixed gas. A filter cartridge is installed at the outer port of the exhaust port to filter the gas discharged through the exhaust port. Inside the housing structure, along the air inlet direction of the mixed gas, a primary filtration mechanism and a secondary filtration mechanism for filtering the mixed gas, a centrifugal separation mechanism for centrifugally separating oil mist in the mixed gas, and a drive motor for providing power are arranged sequentially. The output shaft of the drive motor is coaxially connected to the secondary filtration mechanism and the centrifugal separation mechanism, and the drive motor can drive the secondary filtration mechanism and the centrifugal separation mechanism to rotate.

[0007] Furthermore, the shell structure adopts a modular structure, which includes a main box, sub-boxes and flow equalization box, and the main box, the sub-boxes and the flow equalization box are detachably connected by corresponding bolts.

[0008] Furthermore, the interior of the sub-box is formed with an oil collecting chamber, and an observation window is provided in the oil collecting chamber to observe its interior.

[0009] Furthermore, the sub-box is equipped with an oil drain valve that communicates with the oil collection chamber.

[0010] Furthermore, the drive motor is fixed inside the flow equalization box by a shock-absorbing base, and the output shaft of the drive motor extends into the main box and is connected to the secondary filtration mechanism and the centrifugal separation mechanism.

[0011] Furthermore, the primary filtration mechanism is composed of a conical filter screen and a cylindrical filter cartridge.

[0012] Furthermore, both the conical filter screen and the cylindrical filter cartridge adopt a metal mesh structure with a pore size of 2-5 mm.

[0013] Furthermore, the secondary filtration mechanism is composed of a series of funnel-shaped filter screens.

[0014] Furthermore, multiple funnel-shaped filter screens all adopt a metal pore structure with a pore size of 0.1 to 0.5 mm.

[0015] Furthermore, the filter media of the filter cartridge is activated carbon or glass fiber.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. This utility model realizes the synergistic effect of multi-stage filtration, centrifugal separation and airflow optimization, forming a complete treatment chain of "inhalation → coarse filtration → fine filtration → centrifugal separation → uniform flow purification", which ensures efficient and stable treatment of mixed gases;

[0018] 2. The drive motor, secondary filtration mechanism, and centrifugal separation mechanism of this utility model are designed to work together on the same axis, realizing the integrated function of "power supply - airflow drive - oil mist separation - equipment protection". This significantly improves the oil mist collection efficiency, equipment operation stability, and maintenance convenience. The secondary filtration mechanism is arranged at the front end of the centrifugal separator to form a front barrier. This design not only accelerates the flow of mixed gas through negative pressure effect, but more importantly, it can intercept larger impurities in the mixed gas, preventing them from directly impacting the centrifugal separator's drum and blades, thereby reducing mechanical wear and oil adhesion, and extending the maintenance cycle of the centrifugal separator.

[0019] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 This is a front view of the collector of this utility model;

[0022] Figure 2 This is a side view of the collector of this utility model;

[0023] Figure 3 This is a cross-sectional view of the collector of this utility model;

[0024] Figure 4 This is a schematic diagram of the present invention after removing the shell structure and filter cartridge;

[0025] Figure 5 This is a schematic diagram of the power transmission structure of this utility model.

[0026] The following are the labels in the diagram: 1. Shell structure; 2. Filter cartridge; 3. Primary filtration mechanism; 4. Secondary filtration mechanism; 5. Centrifugal separation mechanism; 6. Drive motor; 7. Oil drain valve; 11. Main housing; 12. Sub-housing housing; 13. Flow equalization box; 31. Conical filter screen; 32. Cylindrical filter cartridge; 111. Air inlet port; 121. Oil collection chamber; 122. Observation window; 131. Exhaust port. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] See Figure 1-5 As shown, an oil mist collector based on the Coanda effect includes a housing structure 1. The housing structure 1 adopts a modular structure, comprising a main housing 11, a sub-housing 12, and a flow equalization box 13, which are detachably connected by corresponding bolts to form a modular structure. The main housing 11 has an air inlet port 111, and the flow equalization box 13 has an exhaust port 131, through which the mixed gas enters and exits. Inside the main housing 11, along the air inlet direction of the mixed gas, a primary filter mechanism 3 and a secondary filter mechanism 4 for filtering the mixed gas are arranged sequentially, as well as a centrifugal separator for centrifugal separation of oil mist in the mixed gas. The separation mechanism 5 includes a primary filtration mechanism 3 with a metal bracket fixed inside the main housing 11. A drive motor 6 is fixedly installed inside the flow equalization box 13 via a shock-absorbing base 8. The output shaft of the drive motor 6 extends into the main housing 11 and is coaxially connected to the secondary filtration mechanism 4 and the centrifugal separation mechanism 5, forming a power transmission assembly. This coaxial design significantly improves working efficiency, reliability, and ease of maintenance. A filter cartridge 2 is fixedly installed at the outer port of the exhaust port 131 on the flow equalization box 13 via a flange connection. This cartridge is used for final purification of the discharged gas, ensuring that the oil mist content in the discharged gas meets environmental standards while preventing external impurities from entering the collector in reverse.

[0030] During operation, the drive motor 6 drives the secondary filtration mechanism 4 and the centrifugal separation mechanism 5 to rotate at high speed, creating a negative pressure environment within the main housing 11. This causes the mixed gas containing oil mist particles to be continuously drawn in through the air inlet 111. After entering the main housing 11, the mixed gas passes through the primary filtration mechanism 3 and the secondary filtration mechanism 4 in sequence, and then enters the centrifugal separation mechanism 5 for oil mist separation. The separated clean gas flows towards the axis and is guided by the flow equalization box 13 to the filter cartridge 2 for final filtration and discharge. Thus, through the synergistic effect of multi-stage filtration, centrifugal separation, and airflow optimization, a complete processing chain of "inhalation → coarse filtration → fine filtration → centrifugal separation → flow equalization purification" is formed, ensuring the efficient and stable operation of the oil mist collector.

[0031] In this embodiment, the primary filtration mechanism 3 is composed of a conical filter screen 31 and a cylindrical filter cartridge 32. Both the conical filter screen 31 and the cylindrical filter cartridge 32 adopt a metal mesh structure with a pore size of 2-5 mm, which can intercept larger oil mist particles, metal debris, dust and other impurities, initially reducing the concentration of pollutants in the mixed gas, reducing the load on subsequent filtration components, and playing a guiding role. The secondary filtration mechanism 4 is composed of four consecutive trumpet-shaped filter screens, and the multiple trumpet-shaped filter screens adopt a metal pore structure with a pore size of 0.1-0.5 mm, which can capture smaller oil mist particles in the gas. The centrifugal separation mechanism 5 generates a strong centrifugal force field through high-speed rotation, causing the remaining submicron-sized oil mist particles to aggregate and settle towards the inner wall of the drum due to centrifugal force. The filter cartridge 2 is filled with a high-efficiency filter material, preferably activated carbon or glass fiber, to achieve final precision filtration of the gas.

[0032] Furthermore, it should be noted that the aforementioned secondary filtration mechanism 4, composed of four consecutive trumpet-shaped filter screens, is only one embodiment and is not intended to limit the scope of this application. In actual installation, the specific number of trumpet-shaped filter screens can be set according to the design and actual needs. The secondary filtration mechanism 4 plays a dual role during equipment operation. Specifically, the rotation of the secondary filtration mechanism 4 generates axial airflow, which pre-accelerates the gas entering the centrifugal separation mechanism 5, enhances the movement speed of oil mist particles in the centrifugal force field, and improves separation efficiency. At the same time, the secondary filtration mechanism 4 acts as a pre-barrier, blocking fine impurities in the mixed gas that have not been completely filtered, preventing them from directly impacting the drum and blades of the centrifugal separation mechanism 5, reducing mechanical wear, and its uniform air delivery characteristics can also eliminate airflow pulsation, ensuring that the gas enters the flow equalization box 13 smoothly.

[0033] Furthermore, the oil mist particles that coalesce during the gas-mixture separation process will drip downwards under the influence of gravity. Therefore, in this embodiment, please refer to [the specific details]. Figure 2-3 As shown, the interior of the sub-box 12 forms an oil collection chamber 121, through which dripping oil mist particles are collected; an observation window 122 is provided at the oil collection chamber 121 to observe its interior, through which the amount of oil collected inside the oil collection chamber 121 can be observed; and an oil drain valve 7 is provided on the sub-box 12, which communicates with the oil collection chamber 121, through which the oil collected in the oil collection chamber 121 can be discharged, thereby realizing the recovery and treatment of oil mist.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An oil mist collector based on the Coanda effect, comprising a housing structure (1), wherein the housing structure (1) is provided with an air inlet port (111) and an exhaust port (131) for the entry and exit of a mixed gas; a filter cartridge (2) is installed at the outer port of the exhaust port (131), and the gas discharged through the exhaust port (131) is filtered through the filter cartridge (2), characterized in that: Inside the housing structure (1), along the gas inlet direction of the mixed gas, a primary filter mechanism (3) and a secondary filter mechanism (4) for filtering the mixed gas, a centrifugal separation mechanism (5) for centrifugally separating oil mist in the mixed gas, and a drive motor (6) for providing power are arranged in sequence. The output shaft of the drive motor (6) is coaxially connected to the secondary filter mechanism (4) and the centrifugal separation mechanism (5), and the drive motor (6) can drive the secondary filter mechanism (4) and the centrifugal separation mechanism (5) to rotate.

2. The oil mist collector based on the Coanda effect according to claim 1, characterized in that: The shell structure (1) adopts a modular structure, which includes a main box (11), a sub-box (12) and a flow equalization box (13). The main box (11), the sub-box (12) and the flow equalization box (13) are detachably connected by corresponding bolts.

3. The oil mist collector based on the Coanda effect according to claim 2, characterized in that: The interior of the compartment (12) is formed with an oil collecting chamber (121), and an observation window (122) is provided in the oil collecting chamber (121) for observing its interior.

4. The oil mist collector based on the Coanda effect according to claim 3, characterized in that: An oil drain valve (7) is provided on the sub-box (12) and is connected to the oil collection chamber (121).

5. The oil mist collector based on the Coanda effect according to claim 2, characterized in that: The drive motor (6) is fixed inside the flow equalization box (13) by the shock-absorbing base (8), and the output shaft of the drive motor (6) extends into the main box (11) and is connected to the secondary filtration mechanism (4) and the centrifugal separation mechanism (5).

6. The oil mist collector based on the Coanda effect according to claim 1, characterized in that: The primary filtration mechanism (3) is composed of a conical filter screen (31) and a cylindrical filter cylinder (32).

7. The oil mist collector based on the Coanda effect according to claim 6, characterized in that: Both the conical filter screen (31) and the cylindrical filter cylinder (32) adopt a metal mesh structure with a pore size of 2 to 5 mm.

8. The oil mist collector based on the Coanda effect according to claim 1, characterized in that: The secondary filtration mechanism (4) is composed of a series of funnel-shaped filter screens.

9. The oil mist collector based on the Coanda effect according to claim 8, characterized in that: Multiple horn-shaped filter screens all adopt a metal pore structure with a pore size of 0.1 to 0.5 mm.

10. The oil mist collector based on the Coanda effect according to claim 8, characterized in that: The filter material of the filter cartridge (2) is activated carbon or glass fiber.

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