Oil bath type air filter capable of reducing backflow oil stains and reducing oil consumption of air filter

Abstract

The utility model relates to an oil bath type air filter capable of reducing backflow oil stains and reducing oil consumption of an air filter, and relates to the technical field of engine air inlet systems in dynamic compactors. According to the oil bath type air filter, improvement is carried out on the basis of a traditional straight-through type oil bath type air filter, a traditional straight-through type air inlet pipe is improved into the spiral air inlet pipe, and therefore the length and the bending degree of a backflow channel are increased, the speed of inflow backflow can be effectively reduced, backflow air can conveniently flow back to an oil pool in time, and the service life of the oil bath type air filter is prolonged. The contact area of oil mist carried in inlet gas backflow and the pipe wall is increased, so that the oil mist is more easily adhered to the pipe wall, the backflow gas and the oil mist overflowing from the gas inlet pipe are greatly reduced, the oil contamination area of a vehicle is effectively reduced, the cleanliness of the vehicle is greatly improved, the maintenance cost is greatly reduced, the oil consumption of an air filter is reduced, and the service life of the air filter is prolonged. And meanwhile, the vehicle using feeling is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of engine intake system in dynamic compaction machine, and more specifically to an oil bath air filter that can reduce backflow oil sludge and reduce air filter oil consumption. Background Technology

[0002] Currently, in the field of dynamic compaction machine construction, the working environment contains a lot of dust, impurities, and sand in the air. To improve the filtration efficiency of the engine intake system and extend the service life of the paper filter element, air filters are installed at the front end of the engine intake system. Among them, the most common air filter is the oil bath air filter. Oil bath air filters have a very good filtration effect on dust and sand in the air, and can further prevent larger particles from directly entering the paper air filter and damaging the filter element. However, the intake pipes of existing oil bath air filters in the industry are basically straight-through, and the distance between the air inlet and the oil surface is very short. When backflow occurs, oil mist will escape from the intake pipe with the backflowing gas. The escaped oil mist easily falls on the surface of the air filter and surrounding objects, forming oil stains. This not only increases the oil stain area on the vehicle, reduces vehicle cleanliness, and increases maintenance costs, but also increases air filter oil consumption. At the same time, it is easy to attract mosquitoes and insects, affecting the driving experience. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the existing technology by providing an oil bath air filter that reduces backflow oil contamination and lowers air filter oil consumption. The spiral intake pipe of this invention increases the length and curvature of the backflow channel, effectively slowing down the speed of intake backflow and facilitating timely return of the backflowing gas to the oil sump. It also increases the contact area between the oil mist carried in the backflow and the pipe wall, making it easier for the oil mist to adhere to the pipe wall. This significantly reduces the backflowing gas and oil mist overflowing from the intake pipe, effectively reducing the oil contamination area on the vehicle, greatly improving vehicle cleanliness, significantly reducing maintenance costs, lowering air filter oil consumption, and greatly enhancing the user experience.

[0004] The objective of this utility model can be achieved through the following technical measures:

[0005] This utility model discloses an oil bath air filter that reduces backflow oil contamination and lowers air filter oil consumption. It includes a cylindrical body with a closed inner cavity (providing a mounting base for other components and a sealed exhaust channel for the filtered gas), an oil sump (containing engine oil and providing an oil bath for the air to be filtered) shaped like a basin at the bottom of the body, a lower oil cake placed above the oil sump (for secondary filtration of the mainstream gas after oil bath filtration, adsorbing fine dust particles and oil mist carried in the mainstream gas; and as a limiting support block for the upper oil cake, limiting the height of the intake pipe), an intake pipe vertically inserted into the inner cavity of the body with its bottom end embedded in the center hole of the lower oil cake, a mushroom-shaped rain cap fixed to the top of the intake pipe (connecting the inner cavities of the two), and an upper oil cake fixed in a ring-like manner at the lower part of the intake pipe (working with the lower oil cake to perform secondary filtration of the mainstream gas after oil bath filtration). It adsorbs fine dust particles and oil mist carried in the mainstream gas; on the other hand, it acts as a baffle to limit the height of the intake pipe in conjunction with the lower oil cake; an air inlet (as the inlet for the air to be filtered) is opened on the bottom surface of the rain cap, and an air outlet (as the outlet for the filtered gas) is opened on the upper side wall of the cylinder; the characteristic is that the intake pipe is a spiral intake pipe formed by welding the upper and lower straight pipe sections together with the middle spiral pipe section (the spiral intake pipe increases the length and curvature of the backflow channel, which can not only effectively slow down the speed of the intake backflow and facilitate the timely return of the backflow gas to the oil sump, but also increase the contact area between the oil mist carried in the intake backflow and the pipe wall, making the oil mist more likely to adhere to the pipe wall, thereby greatly reducing the backflow gas and oil mist overflowing from the intake pipe, effectively reducing the oil stain area of ​​the vehicle, greatly improving the cleanliness of the vehicle, significantly reducing maintenance costs, reducing air filter oil consumption, and greatly improving the driving experience).

[0006] In this invention, the distance from the bottom end of the intake pipe extending downwards beyond the upper oil cake is no greater than the thickness of the lower oil cake (ensuring that the intake pipe maintains a certain gap with the oil surface, so as not to obstruct the contact between the impact airflow and the oil bath); the spiral section in the intake pipe has at least two turns of spiral (ensuring the increased length and curvature of the reflux channel).

[0007] The upper and lower oil cakes described in this utility model have the same structure. They are both double-layer screen structures with limiting holes in the center, which are formed by concentric inner and outer cylindrical rings that are vertically supported and welded between the inner and outer edges of the upper and lower filter screen rings. (The inner and outer cylindrical rings support the upper and lower filter screen rings and provide support rigidity; the upper and lower filter screen rings are used for secondary filtration of the mainstream gas after oil bath filtration, adsorbing fine dust particles and oil mist carried in the mainstream gas.)

[0008] The cylinder described in this utility model is an assembly structure consisting of an upper cylinder and a lower cylinder connected by snap-fit ​​joints (facilitating the installation of internal components); a split-type bucket lid is snapped onto the top of the upper cylinder (facilitating the installation of the air inlet pipe); an air outlet connector is inserted into the air outlet on the upper side wall of the upper cylinder (facilitating quick connection with an external air pipe); a contoured support matching the shape of the bottom of the oil tank is provided at the bottom of the lower cylinder (for supporting and limiting the oil tank); a horizontal outward flange is provided on the upper edge of the lower cylinder (facilitating the snap-fit ​​joints and the hanging of the oil tank); the upper side wall of the oil tank has three layers of outward flanges, the upper layer of outward flanges is used to hang the oil tank on the horizontal outward flange on the upper edge of the lower cylinder, the middle layer of outward flanges is used to support the lower oil cake, and the lower layer of outward flanges is attached to the horizontal surface of the contoured support.

[0009] The design principle of this utility model is as follows:

[0010] This invention improves upon the traditional straight-through oil bath air filter by replacing the straight-through intake pipe with a spiral intake pipe. When the air to be filtered, containing dust and sand, enters the spiral intake pipe at high speed through the intake port on the bottom of the rain cap, it rotates downwards along the spiral intake pipe, impacting the oil surface in the oil sump. This causes the oil surface to ripple and the airflow to stir up oil droplets, thus providing an oil bath for the air. Most of the dust and impurities in the air are trapped in the oil. The stirred-up oil mist flows with the main airflow to the lower and upper oil cakes, where it and fine dust particles are absorbed by the upper and lower filter screens for secondary filtration. The filtered airflow rises along the inner cavity of the cylinder to the outlet, and finally exits through the outlet connector and external gas pipe embedded in the upper side wall of the upper cylinder before entering the engine. Some of the agitated oil mist flows upward along the intake pipe with the backflowing gas. Since this invention uses a spiral intake pipe instead of a traditional straight intake pipe, the spiral intake pipe increases the length and curvature of the backflow channel. This not only effectively slows down the speed of the intake backflow, making it easier for the backflowing gas to return to the oil sump in time, but also increases the contact area between the oil mist carried in the intake backflow and the pipe wall, making the oil mist more likely to adhere to the pipe wall. This greatly reduces the backflowing gas and oil mist overflowing from the intake pipe, effectively reducing the oil stain area on the vehicle, greatly improving vehicle cleanliness, significantly reducing maintenance costs, reducing air filter fuel consumption, and greatly improving the driving experience.

[0011] The technical effects of this utility model are as follows:

[0012] The spiral intake pipe of this invention increases the length and curvature of the reflux channel, which not only effectively slows down the speed of intake reflux and facilitates the timely return of refluxed gas to the oil sump, but also increases the contact area between the oil mist carried in the intake reflux and the pipe wall, making the oil mist more likely to adhere to the pipe wall. This greatly reduces the amount of refluxed gas and oil mist overflowing from the intake pipe, effectively reducing the oil stain area on the vehicle, greatly improving vehicle cleanliness, significantly reducing maintenance costs, reducing air filter oil consumption, and greatly improving the driving experience. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] The numbers in the diagram are explained as follows: 1. Rain cap; 2. Air inlet pipe, 2-1. Straight pipe section, 2-2. Spiral pipe section; 3. Cylinder body, 3-1. Upper cylinder body, 3-1-1. Split-type barrel cover, 3-1-2. Air outlet connector, 3-2. Lower cylinder body, 3-2-1. Contouring support, 3-3. Buckle; 4. Upper oil cake; 5. Oil sump, 5-1. Upper outer folded edge, 5-2. Middle outer folded edge, 5-3. Lower outer folded edge; 6. Lower oil cake; 7. Inner cylindrical ring; 8. Outer cylindrical ring; 9. Upper filter screen ring; 10. Lower filter screen ring. Detailed Implementation

[0015] This utility model will be further described in conjunction with the accompanying drawings:

[0016] like Figure 1As shown, this utility model discloses an oil bath air filter that reduces backflow oil contamination and lowers air filter oil consumption. It includes a cylindrical body 3 with a closed inner cavity (providing a mounting base for other components and a sealed exhaust channel for the filtered gas), an oil sump 5 (containing engine oil and providing an oil bath for the air to be filtered) with a basin-like structure built into the bottom of the body 3, and a lower oil cake 6 placed above the oil sump (used to filter the main air stream after oil bath filtration). The body undergoes secondary filtration to adsorb fine dust particles and oil mist carried in the mainstream gas; on the other hand, it serves as a limiting support block for the upper oil cake 4, limiting the height of the air inlet pipe 2. The air inlet pipe 2, which is vertically inserted into the inner cavity of the cylinder 3 and whose bottom end is embedded in the center hole of the lower oil cake 6, is fixed to the top of the air inlet pipe 2. The inner cavities of the two are connected. The mushroom-shaped rain cap 1 is fixed to the upper oil cake 4 in the lower part of the air inlet pipe 2 in a ring manner (on the one hand, it works with the lower oil cake 6 to filter the mainstream gas after oil bath filtration). The system performs secondary filtration to adsorb fine dust particles and oil mist carried in the mainstream gas; on the other hand, it acts as a baffle to limit the height of the intake pipe 2 in conjunction with the lower oil cake 6. An air inlet (as the inlet for the air to be filtered) is provided on the bottom surface of the rain cap 1, and an air outlet (as the outlet for the filtered gas) is provided on the upper side wall of the cylinder 3. The intake pipe 2 is a spiral intake pipe formed by welding two straight pipe sections 2-1 to the middle spiral pipe section 2-2. The spiral intake pipe increases the length and curvature of the backflow channel, which can not only effectively slow down the speed of the backflow of the intake air and facilitate the timely return of the backflow gas to the oil sump, but also increase the contact area between the oil mist carried in the backflow of the intake air and the pipe wall, making the oil mist more likely to adhere to the pipe wall, thereby greatly reducing the backflow gas and oil mist overflowing from the intake pipe, effectively reducing the oil stain area of ​​the vehicle, greatly improving the cleanliness of the vehicle, significantly reducing maintenance costs, reducing air filter oil consumption, and greatly improving the driving experience.

[0017] In this invention, the distance from the bottom end of the intake pipe 2 extending downwards out of the upper oil cake 4 is not greater than the thickness of the lower oil cake 6 (ensuring that the intake pipe 2 maintains a certain gap with the oil surface, so as not to block the contact between the impact airflow and the oil bath); the spiral section in the intake pipe 2 has at least two turns of spiral (ensuring the increased length and curvature of the reflux channel).

[0018] The upper oil cake 4 and lower oil cake 6 described in this utility model have the same structure. They are both double-layer screen structures with limiting holes in the center, which are formed by the concentric inner cylindrical ring 7 and outer cylindrical ring 8 being vertically supported and welded between the inner and outer edges of the upper filter screen ring surface 9 and the lower filter screen ring surface 10. (The inner cylindrical ring 7 and outer cylindrical ring 8 are used to support the upper filter screen ring surface 9 and the lower filter screen ring surface 10, providing support rigidity; the upper filter screen ring surface 9 and the lower filter screen ring surface 10 are used to perform secondary filtration on the mainstream gas after oil bath filtration, adsorbing the fine dust particles and oil mist carried in the mainstream gas.)

[0019] In this invention, the cylinder 3 is an assembly structure consisting of an upper cylinder 3-1 and a lower cylinder 3-2 connected by a snap fastener 3-3 (facilitating the installation of internal components); a split-type bucket lid 3-1-1 is fastened to the top of the upper cylinder 3-1 (facilitating the installation of the air inlet pipe 2); an air outlet connector 3-1-2 is inserted into the air outlet on the upper side wall of the upper cylinder 3-1 (facilitating quick connection with an external air pipe); and a basin bottom matching the shape of the oil sump 5 is provided at the bottom of the lower cylinder 3-2. The matching contour support 3-2-1 (used to support and limit the oil tank 5) has a horizontal outward flange on the upper edge of the lower cylinder 3-2 (to facilitate the fastening of the buckle 3-3; to facilitate the hanging of the oil tank 5); the upper side wall of the oil tank 5 has three layers of outward flanges. The upper outward flange 5-1 is used to hang the oil tank 5 on the horizontal outward flange on the upper edge of the lower cylinder 3-2, the middle outward flange 5-2 is used to support the lower oil cake 6, and the lower outward flange 5-3 is attached to the horizontal surface of the contour support 3-2-1.

[0020] The specific usage of this utility model is as follows:

[0021] First, assemble the present invention according to the structure and positional relationships described above, in conjunction with the attached drawings. Then, connect the present invention to the intake system end of the engine in the dynamic compaction machine. Start the engine's intake system and begin working. Under negative pressure, the air to be filtered, containing dust and sand, enters at high speed from the air inlet on the bottom surface of the rain cap 1 into the spiral intake pipe. It rotates down along the spiral intake pipe and impacts the oil surface of the oil sump 5, causing the oil surface to ripple and the airflow to stir up oil foam. The air is given an oil bath here, and most of the dust and impurities contained in the air are adsorbed into the oil. Most of the stirred-up oil mist flows with the main airflow to the lower oil cake 6 and the upper oil cake 4. The oil mist and fine dust particles are adsorbed by the upper filter screen ring 9 and the lower filter screen ring 10 in the lower oil cake 6 and the upper oil cake 4 for secondary filtration. The filtered airflow rises along the inner cavity of the cylinder 3 to the outlet, and finally flows along the outlet connector 3 inserted on the upper cylinder side wall of the upper cylinder 3-1. -1-2 and the external gas pipelines discharge into the engine of the dynamic compaction machine; some of the agitated oil mist flows upward along the intake pipe 2 with the backflow gas. Since this utility model uses a spiral intake pipe to replace the traditional straight intake pipe, the spiral intake pipe increases the length and curvature of the backflow channel, which can not only effectively slow down the speed of the intake backflow and facilitate the timely return of the backflow gas to the oil sump, but also increase the contact area between the oil mist carried in the intake backflow and the pipe wall, making the oil mist more likely to adhere to the pipe wall. This greatly reduces the backflow gas and oil mist overflowing from the intake pipe, effectively reduces the oil stain area of ​​the vehicle, greatly improves the cleanliness of the vehicle, significantly reduces maintenance costs, and reduces air filter oil consumption, while also greatly improving the user experience.

Claims

1. An oil bath air filter that reduces backflow oil contamination and lowers air filter oil consumption, comprising a cylindrical body (3) with a cylindrical closed inner cavity, an oil sump (5) with a basin-shaped structure built into the bottom of the cavity of the body (3), a lower oil cake (6) placed above the oil sump, an air inlet pipe (2) vertically inserted into the inner cavity of the body (3) and with its bottom end embedded in the center hole of the lower oil cake (6), a rain cap (1) fixed to the top of the air inlet pipe (2) with the inner cavities of the two connected and shaped like a mushroom head, and an upper oil cake (4) fixed in a ring-like manner to the lower part of the air inlet pipe (2); wherein an air inlet is provided on the bottom surface of the rain cap (1) and an air outlet is provided on the upper side wall of the body (3); characterized in that: The intake pipe (2) is a spiral intake pipe formed by welding two straight pipe sections (2-1) at the top and bottom and a spiral pipe section (2-2) in the middle.

2. The oil bath air filter according to claim 1, which can reduce backflow oil sludge and lower air filter oil consumption, is characterized in that: The distance from the bottom end of the intake pipe (2) to the upper oil cake (4) is not greater than the thickness of the lower oil cake (6); the spiral section in the intake pipe (2) has at least two spiral turns.

3. The oil bath air filter according to claim 1, which can reduce backflow oil sludge and lower air filter oil consumption, is characterized in that: The upper oil cake (4) and the lower oil cake (6) have the same structure. They are both double-layer screen structures with a central limiting hole, formed by the concentric inner cylindrical ring (7) and outer cylindrical ring (8) vertically supported and welded between the inner and outer edges of the upper filter screen ring (9) and the lower filter screen ring (10).

4. The oil bath air filter according to claim 1, which can reduce backflow oil sludge and lower air filter oil consumption, is characterized in that: The cylinder (3) is an assembly structure consisting of an upper cylinder (3-1) and a lower cylinder (3-2) connected by a snap fastener (3-3); a split-type bucket lid (3-1-1) is fastened to the top of the upper cylinder (3-1), and an air outlet connector (3-1-2) is inserted into the air outlet on the upper side wall of the upper cylinder (3-1); a contoured support matching the shape of the bottom of the oil tank (5) is provided at the bottom of the lower cylinder (3-2). The upper edge of the lower cylinder (3-2) is provided with a horizontal outward flange; the upper side wall of the oil tank (5) is provided with three layers of outward flanges. The upper outward flange (5-1) is used to hang the oil tank (5) on the upper horizontal outward flange of the lower cylinder (3-2), the middle outward flange (5-2) is used to support the lower oil cake (6), and the lower outward flange (5-3) is attached to the horizontal surface of the contour support (3-2-1).

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