CN111594358A

CN111594358A - Oil bath type air filter

Info

Publication number: CN111594358A
Application number: CN202010493773.3A
Authority: CN
Inventors: 史忠可; 田传宝
Original assignee: Hebei Yili Group Co ltd; Wuxi Yili Environmental Protection Technology Co Ltd
Current assignee: Hebei Yili Group Co ltd; Wuxi Yili Environmental Protection Technology Co Ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-08-28

Abstract

The invention discloses an oil bath type air filter, wherein a clapboard is arranged in an inner shell to divide the interior of the inner shell into an air inlet channel and an air outlet channel, and an oil feeding wire assembly is arranged in the air outlet channel; the upper part of the clapboard inclines a certain angle towards the direction of the air outlet channel to form an inclined part and a vertical part at the lower part, and the inclined part is just opposite to the air inlet; the lower shell is internally provided with a lower oil silk assembly. The baffle of the inner shell of the invention forms an inclined part and a vertical part, the inclined part is just opposite to the air inlet of the upper shell, the air flow enters the airflow diversion accelerating cavity from the air inlet and collides with the inclined surface of the inclined part of the baffle, a part of impurities with larger particles and heavier gravity in the air flow are initially intercepted and filtered on the inclined surface, and slide down along the inclined surface and fall to the bottom of the inner cavity of the lower shell under the action of the self gravity or the airflow pressure, the collided and reversed air flow is accelerated to enter the lower part of the air inlet channel, thus being more beneficial to adsorbing and filtering the impurities in the air flow by the engine oil and having higher filtering efficiency.

Description

Oil bath type air filter

Technical Field

The invention relates to the field of air filters of air inlet systems of internal combustion engines, in particular to an oil bath type air filter.

Background

Oil bath air cleaners are commonly used in the intake system of internal combustion engines to pre-filter the air entering the engine and to filter out impurities in the air. The oil bath type air filter mainly takes oil and a metal wire filter layer as main filter materials, air is used for impacting engine oil, the engine oil absorbs impurities in the air, the air carrying oil mist is filtered by the metal wire filter layer, relatively clean air is discharged, and then the air is input into a next-stage fine filter.

The utility model discloses a chinese utility model 201520534028.3 discloses an oil bath formula air cleaner, including last casing and lower casing, go up casing and separate inlet channel and the casing inner chamber that forms mutual independence, the internal filter core assembly that is provided with down of inferior valve, the internal filter core assembly that is provided with of casing, it is provided with the gas outlet to go up the casing lateral wall, and the air gets into the internal chamber of inferior valve and filters the back through last filter core assembly again from gas outlet department through gas outlet takeover discharge after the inlet channel gets into the internal process of inferior valve filter core assembly. The air inlet channel of the oil bath type air filter is a vertical channel, air directly and vertically rushes into engine oil from the vertical air inlet channel, the speed of air flow cannot be greatly changed, impurities which are large in particles and heavy in gravity and carried in the air are likely to enter a next-stage fine filter along with the air flow, are not adsorbed and filtered due to insufficient viscosity of the oil, the filtering efficiency is influenced, and the filtering efficiency is low; especially, under the working condition of low temperature and low flow, more impurities with larger particles and heavier gravity flow away along with the air flow without being thoroughly filtered due to lower air flow and flow speed, so that the influence on the filtering efficiency is larger, and the filtering efficiency is greatly reduced.

After the existing oil bath type air filter is used for a long time, more oil drops can be deposited at the bottom of a grating of a chassis of an oil discharge wire assembly, so that the oil filtering efficiency of the oil discharge wire assembly is reduced, and the integral filtering efficiency of the oil bath type air filter is further influenced.

Disclosure of Invention

The oil bath type air filter is reasonable in structure, high in filtering efficiency, small in influence of the filtering efficiency, free of oil drop deposition and capable of guaranteeing oil filtering efficiency, and the oil silk feeding assembly is high in filtering efficiency, and especially overcomes the defects that the filtering efficiency is greatly influenced when the existing oil bath type air filter is used at low temperature and low flow, oil drops are deposited on a base plate of the oil silk feeding assembly after the oil silk feeding assembly is used for a long time, and the oil filtering efficiency is reduced.

The technical scheme adopted by the invention is as follows:

an oil bath type air filter comprises an inner shell and a lower outer shell which are communicated with each other, wherein a partition plate is arranged in the inner shell and divides the interior of the inner shell into an air inlet channel and an air outlet channel, the air inlet channel is communicated with an air inlet, and the air outlet channel is communicated with an air outlet; an oil feeding assembly is arranged in the air outlet channel; the upper part of the clapboard inclines a certain angle towards the direction of the air outlet channel to form an inclined part and a vertical part at the lower part, and the inclined part is just opposite to the air inlet; and a lower oil silk assembly is arranged in the lower shell and below the upper oil silk assembly.

The upper part of a partition plate of the inner shell of the invention inclines rightwards for a certain angle towards the direction of the air outlet channel to form an inclined part and a vertical part at the lower part, the inclined part is opposite to the air inlet of the upper shell, an airflow direction-changing acceleration cavity is formed at the upper part of the air inlet channel, the air flow enters the airflow direction-changing acceleration cavity from the air inlet and collides with the inclined surface of the inclined part of the partition plate, a part of impurities with larger particles and heavier gravity in the air flow are initially intercepted and filtered on the inclined surface, slide down along the inclined surface and fall to the bottom of the inner cavity of the lower shell under the action of self gravity or airflow pressure, the collided and reversed air flow enters the lower part of the air inlet channel, the velocity of the air flow is increased because the overflowing area of the lower part of the air inlet channel is reduced, namely the air flow can be accelerated to rush into the, the initial speed increase that the air current rushed into machine oil can get into the deeper of machine oil, more does benefit to the impurity adsorption filtration of machine oil in with the air current, and filtration efficiency is higher, especially when low temperature low discharge operating mode, obtains sufficient initial speed after the air current accelerates and rushes into machine oil for machine oil can filter the impurity in the air current, and is less to holistic filtration efficiency influence, and filtration efficiency is higher.

As a further improvement of the above technical solution:

a filter layer and a rotational flow disk are arranged in a chassis of the oil feeding wire assembly; a plurality of first openings are formed in a bottom plate of the chassis, and the outer side face of the bottom plate and the corresponding first openings respectively extend downwards to form convex edges.

According to the oil drop wire assembly, the outer side surface of the bottom plate of the chassis of the oil drop wire assembly and the first openings of the corresponding grids respectively extend downwards to form a circle of convex edges, oil drops separated by the filtering layer can slide to the lower edges of the convex edges along the first openings of the grids and the inner wall surfaces of the convex edges under the action of surface tension, the oil drops are accumulated to a certain weight and then fall downwards and fall back to an oil pan of the lower shell under the action of gravity, the oil drops are prevented from being deposited on the chassis, the oil filtering efficiency of the oil drop wire assembly is guaranteed, and the integral filtering efficiency of the oil bath type air filter is further guaranteed.

A rotational flow fan is arranged on a rotational flow disk of the oil silk feeding assembly, and a plurality of blades of the rotational flow fan are inclined downwards by a certain angle; one side of the blade at the low position is provided with a bending part; the adjacent blades have a certain gap in the horizontal direction.

The blades of the cyclone fan are inclined downwards by a certain angle, airflow turns to form cyclone after passing through the blades, oil drops in the airflow are further separated under the action of rotating centrifugal force, the oil filtering efficiency of the oil feeding wire assembly is ensured, and the integral filtering efficiency of the oil bath type air filter is further ensured; one side of the oil drop separator positioned at the oblique lower side of the adjacent blade is bent downwards to form a bent part, and the oil drop separated by the blade can slide along the bent part, so that the oil drop deposition is avoided. The adjacent blades have certain gaps in the horizontal direction, so that the resistance is reduced while the rotational flow effect of the rotational flow fan is ensured, and the overlarge back pressure of air flow is avoided.

The inner shell overcoat is equipped with the outer shell, goes up outer shell and lower shell fixed connection, goes up to set up vertical air inlet and the gas outlet of slope on the outer shell.

A sleeve piece is sleeved between the upper outer shell and the inner shell, and the lower end part of the sleeve piece is bent to form a third lower flanging and a transverse straight part; the lower end part of the upper shell is provided with a first lower flanging and a first concave part; a flange is formed at the lower end part of the inner shell; the upper end of the lower shell is provided with an upper flanging and a second concave part.

A first sealing element is arranged among the external member, the inner shell and the lower oil silk assembly, a groove is formed in the inner side face of the first sealing element, an upper convex strip and a lower convex strip are respectively protruded on the upper end face and the lower end face, a flange of the inner shell is clamped and embedded in the groove, the upper convex strip and the lower convex strip are respectively compressed on the bottom face of the transverse straight part of the external member and the top face of the chassis of the lower oil silk assembly, and sealing among the external member, the inner shell and the lower oil silk assembly is achieved.

The second sealing element is arranged between the upper shell, the sleeve piece and the lower shell, the outer side surface of the second sealing element is attached to the inner wall surface of the first lower flanging of the upper shell, the upper flanging of the lower shell is pressed on the lower end surface of the second sealing element, and the upper end surface of the second sealing element is pressed on the inner wall surface corresponding to the upper shell, so that sealing among the upper shell, the sleeve piece and the lower shell is realized.

The thickness of the upper oiling wire assembly is at least twice that of the lower oiling wire assembly.

The pole setting is worn to be equipped with between the silk assembly that oils and the silk assembly that down, and it is fixed through the fastener respectively between silk assembly, the silk assembly that down oils and the pole setting, and the upper portion of pole setting is worn out and is stretched into the mounting hole that the inner shell corresponds from the silk assembly that oils.

An oil pan is fixed in the lower shell and below the lower oil wire assembly; and engine oil is placed at the bottom of the inner cavity of the lower shell and below the oil pan.

The invention has the following beneficial effects:

A plurality of second openings are formed between a plurality of spokes of the inner ring and the outer ring of the swirl disk of the oil drop wire assembly and are used for guiding a part of air flow, increasing the air outlet flow area of the air flow and avoiding the increase of air outlet back pressure caused by the over-small air outlet flow area. The blades of the cyclone fan are inclined downwards by a certain angle, airflow turns to form cyclone after passing through the blades, oil drops in the airflow are further separated under the action of rotating centrifugal force, the oil filtering efficiency of the oil feeding wire assembly is guaranteed, and the integral filtering efficiency of the oil bath type air filter is further guaranteed; one side of the oil drop separator positioned at the oblique lower side of the adjacent blade is bent downwards to form a bent part, and the oil drop separated by the blade can slide along the bent part, so that the oil drop deposition is avoided. The adjacent blades have certain gaps in the horizontal direction, so that the resistance is reduced while the rotational flow effect of the rotational flow fan is ensured, and the overlarge back pressure of air flow is avoided.

Drawings

Fig. 1 is an exploded view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a perspective view of the inner case.

Fig. 5 is a cross-sectional view of fig. 4.

Fig. 6 is an exploded view of the lower wick assembly.

Fig. 7 is a perspective view of the bottom pan of the lower wick assembly.

Fig. 8 is a top view of fig. 7.

Fig. 9 is a sectional view of B-B in fig. 8.

Fig. 10 is an enlarged view of a portion C in fig. 9.

FIG. 11 is a top view of a spinning disk.

FIG. 12 is a cross-sectional view taken along line D-D of FIG. 11.

In the figure: 1. an upper housing; 11. an air inlet; 12. an air outlet; 13. a first lower flanging; 14. a first recessed portion;

2. an inner shell; 21. an air intake passage; 22. an air outlet channel; 23. a flange; 24. a partition plate; 241. an inclined portion; 242. a vertical portion; 25. a first rib plate; 26. enclosing plates; 27. a first upright post; 28. erecting ribs; 29. second lower flanging;

3. oiling a silk assembly;

4. a oiling wire assembly; 41. a chassis; 410. a base plate; 411. a second upright post; 412. a first opening; 413. a vent hole; 414. a second rib plate; 415. a convex edge; 42. a filtering layer; 43. a spinning disk; 430. a swirl fan; 431. a vertical plate; 432. a blade; 433. an outer ring; 434. spokes; 435. an inner ring; 436. a second opening; 437. a bending section; 438. a gap;

5. a lower housing; 51. upward flanging; 52. a second recessed portion;

6. a first seal member; 61. a groove; 62. upward convex strips; 63. a lower convex strip;

7. erecting a rod; 8. an oil pan; 9. a kit; 91. third lower flanging; 92. a transverse straight portion; 10. a second seal member; 100. and (4) engine oil.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 and 2, the upper housing 1 of the present invention is fixed to the lower housing 5 by snap-fit connection; the upper outer shell 1 is provided with a vertical air inlet 11 and an air outlet 12 which inclines outwards for a certain angle, the inner shell 2 is fixedly arranged in the upper outer shell 1 through a fastener, and a sealing element is arranged between the inner shell 2 and the upper outer shell 1, so that the influence of air leakage in a gap between the inner shell 2 and the upper outer shell 1 on the filtering effect is avoided; the inner shell 2 is internally provided with a partition plate 24 which partitions the inside of the inner shell 2 into an air inlet channel 21 and an air outlet channel 22, the air inlet channel 21 is communicated with the air inlet 11, the air outlet channel 22 is communicated with the air outlet 12, the air inlet channel 21 and the air outlet channel 22 are communicated with the inner cavity of the lower outer shell 5, the air outlet channel 22 is internally provided with the upper oil silk assembly 3, the lower oil silk assembly 4 is arranged in the lower outer shell 5 and positioned right below the upper oil silk assembly 3, the thickness of the upper oil silk assembly 3 is at least twice that of the lower oil silk assembly 4, and the risk of oil loss is reduced; an upright rod 7 penetrates between the upper oiled silk assembly 3 and the lower oiled silk assembly 4, the upper oiled silk assembly 3, the lower oiled silk assembly 4 and the upright rod 7 are fixed through fasteners respectively, and the upper part of the upright rod 7 penetrates out of the upper oiled silk assembly 3 and extends into a corresponding mounting hole of the inner shell 2; a porous oil pan 8 is fixed in the lower shell 5 and below the lower oil wire assembly 4, the engine oil 100 is placed at the bottom of the inner cavity of the lower shell 5 and below the oil pan 8, and the liquid level of the engine oil 100 is lower than the oil pan 8 under the normal condition.

As shown in fig. 1, the upper outer shell 1, the inner shell 2, the lower outer shell 5 and the lower oil filament assembly 4 are sealed by a first sealing element 6 and a second sealing element 10; as shown in fig. 3, the lower end of the upper shell 1 is bent to form a first lower flange 13 and a first concave portion 14; the lower end of the inner shell 2 protrudes outwards to form a flange 23; a sleeve 9 is sleeved between the upper outer shell 1 and the inner shell 2, the lower end part of the sleeve 9 is bent to form a third lower flanging 91 and a horizontal straight part 92, and the top surface of the horizontal straight part 92 is tightly attached to the bottom surface of the first concave part 14 of the upper outer shell 1; the upper end part of the lower shell 5 is bent to form an upper flanging 51 and a second concave part 52, and the chassis 41 of the lower oil silk assembly 4 is placed on the top surface of the second concave part 52; the first sealing element 6 is arranged among the external member 9, the inner shell 2 and the lower oil silk assembly 4, a groove 61 is formed in the inner side surface of the first sealing element inwards, two upper convex strips 62 and two lower convex strips 63 are respectively protruded on the upper end surface and the lower end surface of the first sealing element, the flange 23 of the inner shell 2 is clamped and embedded in the groove 61, the upper convex strips 62 and the lower convex strips 63 are respectively pressed on the bottom surface of the horizontal straight part 92 of the external member 9 and the top surface of the chassis 41 of the lower oil silk assembly 4, and the sealing among the external member 9, the inner shell 2 and the lower oil silk assembly; the second sealing element 10 is a sealing strip with a square cross section and is arranged between the upper shell 1, the external member 9 and the lower shell 5, the outer side surface of the second sealing element 10 is tightly attached to the inner wall surface of the first lower flanging 13 of the upper shell 1, the upper flanging 51 of the lower shell 5 is extruded and tightly attached to the lower end surface of the second sealing element 10, the upper end surface of the second sealing element 10 is extruded and tightly attached to the corresponding inner wall surface of the upper shell 1, sealing among the upper shell 1, the external member 9 and the lower shell 5 is realized, and the sealing reliability is high.

As shown in fig. 4 and 5, the height of the left side wall surface of the inner casing 2 corresponding to the air inlet channel 21 is greater than the height of the right side wall surface of the corresponding air outlet channel 22, the upper portion of the partition plate 24 is inclined to the right by a certain angle toward the direction of the air outlet channel 22 to form an inclined portion 241 and a vertical portion 242 at the lower portion, the height of the vertical portion 242 is equivalent to the height of the front, rear and right side wall surfaces of the inner casing 2, an air outlet corresponding to the inclined air outlet 12 is formed in the air outlet channel 22, as shown in fig. 2, the inclined portion 241 is opposite to the air inlet 11 of the upper outer casing 1, an air flow direction changing acceleration chamber is formed at the upper portion of the air inlet channel 21, the air flow enters the air flow direction changing acceleration chamber from the air inlet 11 and impinges on the inclined surface of the inclined portion 241 of the partition plate 24, a part, glide along the inclined plane, fall to the bottom of 5 inner chambers of shell under, the air current that the striking becomes backward gets into the lower part of inlet channel 21, because the flow area of inlet channel 21 lower part reduces, therefore the speed of air current increases, the air current passes through the air current diversion after accelerating the chamber, can rush into in machine oil 100 with higher speed, and the oil pressure of machine oil 100, viscosity increases along with the degree of depth increase, the initial velocity increase of machine oil 100 is rush into to the air current, can get into the deeper of machine oil 100, more do benefit to machine oil 100 and filter the impurity absorption in the air current, the filtration efficiency is higher, especially when low temperature low flow operating mode, the air current obtains sufficient initial velocity after accelerating and rush into machine oil 100, make machine oil 100 can filter the impurity in the air current, influence less to holistic filtration efficiency, the filtration efficiency is higher. As shown in fig. 5, the included angle α between the inclined portion 241 of the partition plate 24 and the horizontal plane is in the range of 30 to 50 degrees, so that while the air flow is effectively primarily intercepted and filtered and sufficiently accelerated, the sufficient air outlet flow area of the air outlet channel 22 can be ensured, and the increase of the air outlet back pressure due to the excessively small air outlet flow area is avoided; as shown in fig. 4 and 5, a plurality of first rib plates 25 are vertically arranged between the vertical portion 242 of the partition plate 24 and the corresponding inner wall surface of the inner shell 2, so that the supporting strength between the inner shell 2 and the partition plate 24 is increased, and the collapse deformation between the inner shell 2 and the partition plate 24 is avoided. A circle of coamings 26 are vertically arranged at the top end of the inner shell 2 and above the inclined part 241 upwards to form a square air flow inlet so as to guide the air in the air inlet 11 to enter an air flow direction-changing accelerating cavity of the air inlet channel 21; a plurality of first upright posts 27 are respectively vertically arranged on the left outer side and the right outer side of the enclosing plate 26, and mounting holes are formed in the first upright posts 27 and used for mounting fasteners and fixedly connecting the inner shell 2 with the upper outer shell 1; vertical ribs 28 are respectively arranged between the adjacent first upright columns 27 and between each first upright column 27 and the wall surface of the enclosing plate 26, so that the strength is increased, and the deformation is avoided. As shown in fig. 5, the top end of the vertical portion 242 of the partition plate 24 and the top ends of the front and rear wall surfaces and the right side wall surface of the inner casing 2 corresponding to the air outlet channel 22 are bent downward to form a second turned-down edge 29 for pressing the sealing member between the inner casing 2 and the top surface of the upper wire assembly 3 to seal therebetween.

As shown in fig. 2 and 6, a filter layer 42 and a swirl disk 43 are sequentially arranged in a bottom plate 41 of the lower oil silk assembly 4 from inside to outside; the internal structure of filtering layer 42 is the tiny net of the crisscross maze form of winding of oil silk, and when the air current passed through filtering layer 42, the oil drop in the air current received the effect of surface tension, was blockked at a plurality of tiny net surfaces, received gravity and surface tension effect, by the big oil drop of little oil collection, big oil drop is dropped downwards under the effect of gravity. As shown in fig. 6 to 8, the left side of the chassis 41 corresponding to the air intake channel 21 has a plurality of vent holes 413, and a second rib plate 414 is arranged between adjacent vent holes 413 to increase the strength and avoid deformation; as shown in fig. 7, the right side of the chassis 41 is in the shape of a flat square box with an open top, and two second upright columns 411 are erected upward on the inner side of the bottom plate 410, as shown in fig. 6, the filter layer 42 and the cyclone disk 43 are arranged on the second upright columns 411 in a penetrating manner, and a through hole is formed in the center of the second upright columns 411 for the upright column 7 to penetrate; as shown in fig. 7, 9, and 10, a plurality of grid first openings 412 are uniformly formed in a bottom plate 410 of a chassis 41, the outer side surface of the bottom plate 410 and each grid first opening 412 respectively extend downwards to form a circle of convex edge 415, the height of the downward extension of the convex edge 415 is greater than or equal to 3mm, oil drops separated by a filter layer 42 can slide down to the lower edge of the convex edge 415 along the inner wall surfaces of the grid first openings 412 and the convex edge 415 under the action of surface tension, and the oil drops accumulate to a certain weight and then drop down and return to an oil pan 8 of a lower housing 5 under the action of gravity, so that oil drops are prevented from being deposited on the chassis 41, the oil filtering efficiency of a lower oil wire assembly 4 is ensured, and the overall filtering efficiency of an oil bath type air cleaner is further ensured.

As shown in fig. 11, at least one swirl fan 430 is arranged in the swirl disk 43 of the oil drop wire assembly 4 in the approximately square outer frame along the length direction, in this embodiment, a pair of swirl fans 430 is symmetrically arranged, a vertical plate 431 is erected between the two swirl fans 430, a plurality of blades 432 of each swirl fan 430 are fixedly arranged on the outer wall surface of the outer ring 433 at the center along the circumferential direction, and the outer end portions of the blades 432 are fixed on the inner wall surface of the outer frame and the wall surface of one side corresponding to the vertical plate 431; the outer ring 433 is connected with an inner ring 435 through a plurality of spokes 434 which are uniformly arranged, and a central through hole of the inner ring 435 is used for penetrating the second upright column 411 and the upright rod 7; a plurality of second openings 436 are formed between the outer ring 433 and the spokes 434 of the inner ring 435 for guiding a part of the air flow to increase the air outlet flow area of the air flow, thereby preventing the air outlet back pressure from increasing due to the excessively small air outlet flow area. As shown in fig. 12, the blades 432 of the cyclone fan 430 are inclined downward by a certain angle, the airflow turns to form a cyclone after passing through the blades 432, oil drops in the airflow are further separated under the action of a rotating centrifugal force, the oil filtering efficiency of the oil feeding yarn assembly 4 is ensured, and the overall filtering efficiency of the oil bath type air filter is further ensured; the vanes 432 are positioned obliquely below the adjacent vanes 432, and one side of the vanes 432 positioned at a lower position is bent downwards to form a bent part 437, so that oil droplets separated by the vanes 432 can slide down along the bent part 437, and the oil droplets are prevented from being deposited; as shown in FIG. 11, a certain gap 438 is formed between adjacent blades 432 in the horizontal direction, and the width D of the gap 438 is not less than 7mm and not more than 10mm, so that the resistance is reduced while the swirling effect of the swirling fan 430 is ensured, and the excessive back pressure of the airflow is avoided.

When the invention is in practical use, air flow enters the air flow diversion acceleration cavity at the upper part of the air inlet channel 21 from the air inlet 11, collides with the inclined surface of the inclined part 241 of the partition plate 24, enters the lower part of the air inlet channel 21 after being subjected to primary filtration and acceleration diversion, passes through the vent hole 413 on the chassis 41 of the lower oiling thread assembly 4 and is flushed into the engine oil 100 below the oil pan 8, particles with the particle size of more than 1000 micrometers in the air flow are adsorbed and filtered in the engine oil 100, and oil drops are stripped and filtered by the lower oiling thread assembly 4 and the upper oiling thread assembly 3 which are turned upwards and sequentially pass through the air outlet channel 22 and are discharged from the air outlet 12.

The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, as the invention may be modified in any manner without departing from the spirit thereof.

Claims

1. An oil bath air cleaner, includes inside inner shell (2) and lower shell (5) that switches on, its characterized in that: a partition plate (24) is arranged in the inner shell (2) and divides the interior of the inner shell (2) into an air inlet channel (21) and an air outlet channel (22), the air inlet channel (21) is communicated with the air inlet (11), and the air outlet channel (22) is communicated with the air outlet (12); an oil feeding assembly (3) is arranged in the air outlet channel (22);

the upper part of the clapboard (24) inclines a certain angle towards the direction of the air outlet channel (22) to form an inclined part (241) and a vertical part (242) at the lower part, and the inclined part (241) is opposite to the air inlet (11);

a lower oil silk assembly (4) is arranged in the lower shell (5) and below the upper oil silk assembly (3).

2. The oil bath air cleaner of claim 1, wherein: a filtering layer (42) and a rotational flow disk (43) are arranged in a base plate (41) of the oil feeding assembly (4); a bottom plate (410) of the chassis (41) is provided with a plurality of first openings (412), and the outer side surface of the bottom plate (410) and corresponding to each first opening (412) respectively extend downwards to form a convex edge (415).

3. The oil bath air cleaner according to claim 1 or 2, wherein: a rotational flow fan (430) is arranged on a rotational flow disc (43) of the oil outlet wire assembly (4), and a plurality of blades (432) of the rotational flow fan (430) are inclined downwards by a certain angle; a bending part (437) is formed on one side of the blade (432) at the lower position; adjacent blades (432) have a gap (438) in the horizontal direction.

4. The oil bath air cleaner of claim 1, wherein: an upper outer shell (1) is sleeved outside the inner shell (2), the upper outer shell (1) is fixedly connected with the lower outer shell (5), and a vertical air inlet (11) and an inclined air outlet (12) are formed in the upper outer shell (1).

5. The oil bath air cleaner of claim 4, wherein: an external member (9) is sleeved between the upper outer shell (1) and the inner shell (2), and the lower end part of the external member (9) is bent to form a third lower flanging (91) and a transverse straight part (92); a first lower flanging (13) and a first concave part (14) are formed at the lower end part of the upper shell (1); a flange (23) is formed at the lower end part of the inner shell (2); an upper flange (51) and a second recessed portion (52) are formed at the upper end of the lower housing (5).

6. The oil bath air cleaner of claim 5, wherein: external member (9), inner shell (2), set up first sealing member (6) down between oil silk assembly (4), recess (61) are seted up to the medial surface of first sealing member (6), it has last sand grip (62) to go up, lower terminal surface is protruding respectively, lower sand grip (63), flange (23) inlay card of inner shell (2) is in recess (61), the bottom surface of the horizontal straight portion (92) of external member (9), the top surface of chassis (41) of oil silk assembly (4) compresses tightly respectively sand grip (62) down, lower sand grip (63), realize external member (9), inner shell (2), down sealed between oil silk assembly (4).

7. The oil bath air cleaner of claim 5, wherein: go up shell (1), external member (9), set up second sealing member (10) between lower shell (5), the lateral surface of second sealing member (10) pastes the internal face that tightly goes up first turn-ups (13) of last shell (1), the last turn-ups (51) of lower shell (5) compress tightly at the lower terminal surface of second sealing member (10), the up end of second sealing member (10) compresses tightly on the internal face that last shell (1) corresponds, realize going up shell (1), external member (9), seal between lower shell (5).

8. The oil bath air cleaner of claim 1, wherein: the thickness of the upper oiling wire assembly (3) is at least twice of that of the lower oiling wire assembly (4).

9. The oil bath air cleaner of claim 1, wherein: an upright rod (7) penetrates between the upper oiling wire assembly (3) and the lower oiling wire assembly (4), the upper oiling wire assembly (3), the lower oiling wire assembly (4) and the upright rod (7) are fixed through fasteners respectively, and the upper portion of the upright rod (7) penetrates out of the upper oiling wire assembly (3) and extends into a mounting hole corresponding to the inner shell (2).

10. The oil bath air cleaner of claim 1, wherein: an oil pan (8) is fixed in the lower shell (5) and positioned below the lower oil wire assembly (4); the engine oil (100) is placed at the bottom of the inner cavity of the lower shell (5) and below the oil pan (8).