CN111441887A

CN111441887A - Oil bath type air filter

Info

Publication number: CN111441887A
Application number: CN202010385360.3A
Authority: CN
Inventors: 杨俊�; 卢英义; 陈洪凯
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Sany Heavy Machinery Ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-07-24

Abstract

The invention provides an oil bath type air filter, and relates to the technical field of filtering devices. The oil bath type air filter comprises a pre-filtering device, a middle cylinder, a lower cylinder and an air inlet channel; the pre-filtering device is provided with an air inlet; a filter element structure is arranged in the middle barrel, and an air outlet is arranged on the barrel wall of the middle barrel; an oil chassis is arranged on the lower cylinder body; the air inlet end of the air inlet channel is communicated with the air inlet, and the air outlet end of the air inlet channel is exhausted towards the oil chassis and is communicated with the air outlet; the pre-filtering device is connected with one end of the middle cylinder through an air inlet channel; the lower cylinder body is detachably connected with the other end of the middle cylinder body. The invention solves the technical problem of great difficulty in the conventional oil bath type air filter maintenance.

Description

Oil bath type air filter

Technical Field

The invention relates to the technical field of filtering devices, in particular to an oil bath type air filter.

Background

The oil bath type air filter is used for filtering particulate matters in intake air, provides clean air for the engine, protects parts such as a cylinder, a piston and the like of the engine and prolongs the service life of the engine. The oil bath type air filter has a simple structure, can achieve more than 90% of filtering precision, and takes oil and metal wires as main filter materials. The air containing impurities passes through the oil pan, so that the impurities in the air are in contact with the oil and are attached to an oil film. The air then passed through a wire filter layer. So that the impurities wrapped by the oil film are adhered in the metal wire. The air is filtered at the first stage, and the air after rough filtration enters a main filter element (paper) of a filter for fine filtration and then enters an engine. Because of its high filtration precision, the most granule in the air admission is filtered in the empty machine oil that strains of oil bath formula, leads to the machine oil to become thick, and especially under the adverse conditions, the fatlute that has the dust is adhered to the wire filter, makes the maintenance cycle shorten by a wide margin.

The inside two metal wire filter layers that are equipped with of current oil bath formula air filter, wherein the metal wire filter layer on upper portion generally can't take out the maintenance, perhaps takes out the maintenance of being particularly difficult, the maintenance's of the oil bath formula air filter degree of difficulty that increases.

Disclosure of Invention

The invention aims to provide an oil bath type air filter which can improve the convenience of maintenance.

The technical scheme of the invention is realized as follows:

an oil bath type air filter comprises a pre-filtering device, a middle cylinder, a lower cylinder and an air inlet channel;

the pre-filtering device is provided with an air inlet; a filter element structure is arranged in the middle barrel, and an air outlet is formed in the wall of the middle barrel; an oil chassis is arranged on the lower cylinder; the air inlet end of the air inlet channel is communicated with the air inlet, and the air outlet end of the air inlet channel is discharged towards the oil chassis and is communicated with the air outlet;

the pre-filtering device is connected with one end of the middle cylinder through the air inlet channel; the lower cylinder body is detachably connected with the other end of the middle cylinder body.

In a preferred embodiment of the present invention, the air inlet passage of the oil bath type air filter includes a first pipe and a second pipe;

the first pipeline is arranged at the bottom of the pre-filtering device, a first end of the first pipeline extends along the top of the filtering device, and a second end of the first pipeline extends along the inside of the middle cylinder;

the second pipeline is arranged in the middle cylinder, the first end of the second pipeline is connected with the second end of the first pipeline, and the second end of the second pipeline faces the oil pan.

In a preferred embodiment of the present invention, in the oil bath type air filter, a first seal is provided at a position where the first pipe and the second pipe are connected.

In a preferred technical scheme of the invention, the oil bath type air filter comprises a middle cylinder body and a middle cylinder body, wherein the middle cylinder body comprises a cylinder body upper cover and a middle cylinder body;

the upper cover of the barrel body covers one end of the middle barrel body and is clamped with the middle barrel body.

In a preferred technical scheme of the invention, in the oil bath type air filter, a second sealing element is arranged at the position where the upper cover of the cylinder body is clamped with the middle cylinder body.

In a preferred technical scheme of the invention, the lower cylinder and the middle cylinder are clamped and connected with each other in the oil bath type air filter.

In a preferred technical scheme of the invention, in the oil bath type air filter, a third sealing element is arranged at the position where the lower cylinder and the middle cylinder are clamped.

In a preferred embodiment of the present invention, the oil bath type air filtration device includes an upper cylinder;

the air inlet is arranged at one end of the upper cylinder body, which is far away from the middle cylinder body; guide vanes are arranged inside the air inlet; and a dust leakage opening is formed in the end face of one end, close to the middle cylinder body, of the upper cylinder body.

In a preferred technical scheme of the invention, the oil bath type air filter comprises a filter element structure and a metal wire filter layer arranged inside the filter element structure.

In a preferred technical scheme of the invention, the oil bath type air filter is characterized in that the oil chassis is provided with an oil filtering hole.

The invention has the beneficial effects that: the oil bath type air filter provided by the invention comprises a pre-filtering device, a middle cylinder, a lower cylinder and an air inlet channel; the pre-filtering device is provided with an air inlet; a filter element structure is arranged in the middle barrel, and an air outlet is arranged on the barrel wall of the middle barrel; an oil chassis is arranged on the lower cylinder body; the air inlet end of the air inlet channel is communicated with the air inlet, and the air outlet end of the air inlet channel is exhausted towards the oil chassis and is communicated with the air outlet; the pre-filtering device is connected with one end of the middle cylinder through an air inlet channel; the lower cylinder body is detachably connected with the other end of the middle cylinder body. According to the oil bath type air filter provided by the invention, air enters the pre-filtering device from the air inlet on the pre-filtering device, enters from the air inlet end of the air inlet channel after being pre-filtered, and then is exhausted from the air outlet end of the air inlet channel towards the oil chassis, and impurities in the air are contacted with oil in the oil chassis through the oil chassis and are attached with an oil film; the gas continuously runs towards the gas outlet on the middle cylinder, and impurities attached with the oil film are blocked by the filter element structure arranged in the middle cylinder, so that the purified air is discharged from the gas outlet; through long-term use, by the impurity that the filter core structure separation got off fall into the lower part barrel, and be connected for dismantling between middle part barrel and the lower part barrel, made things convenient for taking out of filter core structure in the barrel of middle part to and the clearance of machine oil in the barrel of lower part, thereby improved the convenience of maintenance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of an oil bath type air filter according to an embodiment of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is an enlarged view at B of FIG. 1;

fig. 4 is an enlarged view at C in fig. 1.

In the figure:

100-a pre-filtration device; 101-an upper barrel; 102-an air inlet; 103-guide vanes; 104-dust leakage port; 200-middle cylinder; 201-upper cover of cylinder; 202-middle barrel body; 203-a second seal; 204-gas outlet; 205-upper snap; 206-lower snap; 207-a first oil cake; 208-a second oil cake; 209-support plate; 210-an air filter mounting limiting block; 300-lower cylinder; 301-oil pan; 302-oil filter holes; 303-a third seal; 400-an intake passage; 401-a first conduit; 402-a second conduit; 403-first seal.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

First embodiment

Referring to fig. 1, the present embodiment provides an oil bath type air filter, which includes a pre-filtering device 100, a middle cylinder 200, a lower cylinder 300 and an air inlet passage 400;

the pre-filtering device 100 is provided with an air inlet 102; a filter element structure is arranged in the middle barrel 200, and an air outlet 204 is arranged on the barrel wall; an oil pan 301 is arranged on the lower barrel 300; the air inlet end of the air inlet channel 400 is communicated with the air inlet 102, and the air outlet end of the air inlet channel 400 is discharged towards the oil pan 301 and is communicated with the air outlet 204;

the pre-filtering device 100 is connected with one end of the middle cylinder 200 through the air inlet channel 400; the lower cylinder 300 is detachably connected to the other end of the middle cylinder 200.

In the oil bath type air filter provided by this embodiment, air enters the pre-filter device 100 through the air inlet 102 on the pre-filter device 100, enters through the air inlet end of the air inlet channel 400 after being pre-filtered, and then exits toward the oil pan 301 through the air outlet end of the air inlet channel 400, and impurities in the air contact with oil in the oil pan 301 through the oil pan 301 and adhere to an oil film; the gas continues to run towards the gas outlet 204 on the middle cylinder 200, and impurities attached with the oil film are blocked by the filter element structure arranged inside the middle cylinder 200, so that the gas outlet 204 discharges the purified air; through long-term use, by the impurity that the separation of filter core structure got off fall into lower part barrel 300 in, and be connected for dismantling between middle part barrel 200 and the lower part barrel 300, made things convenient for taking out of filter core structure in the middle part barrel 200 to and the clearance of machine oil in the barrel 300 of lower part, thereby improved the convenience of maintenance.

In an alternative of the present embodiment, the intake passage 400 includes a first duct 401 and a second duct 402;

the first pipe 401 is arranged at the bottom of the pre-filtering device 100, a first end of the first pipe 401 extends along the top of the filtering device, and a second end of the first pipe 401 extends along the inside of the middle cylinder 200;

the second pipe 402 is disposed in the middle cylinder 200, and a first end of the second pipe 402 is connected to a second end of the first pipe 401, and the second end of the second pipe 402 faces the oil pan 301.

Referring to fig. 2, the air inlet channel 400 is composed of a first pipeline 401 and a second pipeline 402, wherein the first pipeline 401 is fixed in the pre-filtering device 100, the second pipeline 402 is arranged in the middle cylinder 200, and the pre-filtering device 100 is connected with the middle cylinder 200 by sleeving the first pipeline 401 and the second pipeline 402, so that the pre-filtering device 100 is convenient to disassemble and assemble.

In the above technical solution, a first sealing member 403 is further disposed at a position where the first pipe 401 is connected to the second pipe 402.

In order to ensure the filtering precision and prevent the unfiltered gas from overflowing between the two pipes, the first sealing member 403 is provided at the position where the first pipe 401 and the second pipe 402 are sleeved. Specifically, the first sealing element 403 is annular, an inner ring of the annular first sealing element 403 is sleeved on the second pipeline 402, a sealing groove is arranged on an end face of the first sealing element 403 close to the first pipeline 401, the first pipeline 401 is sleeved on the second pipeline 402, and an outer edge of an end of the first pipeline 401 is matched with the sealing groove.

In the alternative of this embodiment, the middle cylinder 200 includes a cylinder upper cover 201 and a middle cylinder 202;

the barrel upper cover 201 covers one end of the middle barrel body 202 and is clamped with the middle barrel body 202.

Referring to fig. 3, the structure of the upper cover 201 and the middle body 202 of the middle cylinder facilitates the filter element structure inside the middle cylinder 200 to be taken out and put in from above the middle cylinder 200, thereby improving the convenience of maintaining the filter element structure. Specifically, a plurality of upper portion buckles 205 are arranged along the circumferential direction and evenly distributed on the edge covered by the middle barrel body 202 and the barrel upper cover 201, a plurality of protrusions are arranged at positions corresponding to the plurality of upper portion buckles 205 on the barrel upper cover 201, and the plurality of buckles are buckled on the plurality of protrusions in a one-to-one correspondence manner.

In the above technical solution, further, a second sealing member 203 is disposed at a position where the cylinder upper cover 201 and the middle cylinder 202 are clamped.

In order to ensure the air tightness of the middle cylinder 200 and prevent the filtered air from overflowing from the upper cylinder cover 201 and the middle cylinder 202, a second sealing member 203 is arranged at the position where the upper cylinder cover 201 and the middle cylinder 202 are clamped.

In an alternative of this embodiment, the lower cylinder 300 is engaged with the middle cylinder 200.

Referring to fig. 4, the lower cylinder 300 and the middle cylinder 200 are clamped together, so that the filter element structure inside the middle cylinder 200 can be conveniently taken out and put in from the lower side of the middle cylinder 200, and the convenience of maintaining the filter element structure is improved. Specifically, the body of middle part barrel 200 sets up a plurality of lower part buckles 206 along the circumference equipartition on the border that lower part barrel 300 lid closed, and the position that corresponds a plurality of lower part buckles 206 on the barrel 300 of lower part sets up a plurality of archs, and a plurality of buckle one-to-one lock are on a plurality of archs.

In the above technical solution, further, a third sealing element 303 is disposed at a position where the lower cylinder 300 and the middle cylinder 200 are clamped.

In order to ensure the air tightness of the middle cylinder 200 and prevent the filtered air from overflowing from the joint of the lower cylinder 300 and the middle cylinder 200, a third sealing element 303 is disposed at the joint of the lower cylinder 300 and the middle cylinder 202.

In an alternative of this embodiment, the pre-filter device 100 comprises an upper shaft 101;

the air inlet 102 is arranged at one end of the upper cylinder body 101 far away from the middle cylinder body 200; a guide vane 103 is arranged in the air inlet 102; and a dust leakage port 104 is formed in the end surface of one end of the upper barrel 101, which is close to the middle barrel 200.

The outer wall of the upper barrel 101, which is far away from the middle barrel 200, is provided with a plurality of air inlets 102, and the plurality of air inlets 102 are uniformly distributed along the circumferential direction. The air inlet 102 has a guide vane 103 therein, and the bottom of the upper cylinder 101 is provided with two dust leakage ports protruding toward the inside of the upper cylinder 101. Unfiltered air enters from the air inlet 102 and then forms a rotational flow, large particles fall to the bottom of the upper barrel body 101 under the action of centrifugal force and are discharged from a dust leakage, a pre-filtering effect is achieved, and therefore part of dust is directly discharged out of the oil bath type air filter, and the maintenance period of the oil bath type air filter is prolonged.

In the alternative of this embodiment, the filter core structure is including filtering the oil cake, filter the inside wire filter layer that is provided with of oil cake.

The filter element arrangement includes at least one filter cake supported by a support plate 209. In this embodiment, the filter element structure includes a first filter cake 207 and a second filter cake 208, wherein the first filter cake 207 is supported by a support plate 209 provided in the middle cylinder 200, and the second filter cake 208 is supported by an oil pan 301 provided in the lower cylinder 300. An air outlet 204 is arranged above the filtering oil cake, and the air outlet 204 is used for discharging clean air filtered by the oil bath type air filter to a next-stage filter or the engine air inlet 102. And a metal wire filtering layer is arranged in the filtering oil cake, and metal wires are woven into a steel wire mesh and used for intercepting oil mist with dust.

In an alternative of this embodiment, the oil pan 301 is provided with an oil filter hole 302.

An oil chassis 301 is arranged in the lower cylinder 300, the outer edge of the oil chassis 301 is fixed on the lower cylinder 300, 8 oil filtering holes 302 are uniformly distributed on the outer edge of the oil chassis 301, and 4 oil filtering holes 302 are also uniformly distributed on the disc surface of the oil chassis 301. The lower cylinder 300 and the oil chassis 301 are used for containing engine oil, and the engine oil can freely pass through 8 oil filtering holes 302 uniformly distributed on the outer edge of the oil chassis 301 and 4 oil filtering holes 302 uniformly distributed on the disc surface of the oil chassis 301, so that the two outer surface spaces of the oil chassis 301 are communicated. The oil pan 301 may also support the filter cake directly thereon.

The air that has been pre-filtered enters from one end of the air intake passage 400 and is discharged from the other end of the air intake passage 400, and collides against the oil contained in the oil pan 301 to form oil mist, and dust adheres to the oil mist. The oil mist with dust is intercepted by the filtering oil cake, and the impurities wrapped by the oil film are adhered in the metal wire, continuously adhered to form oil drops and fall off in the oil chassis 301. The dust is precipitated and enters the bottom of the lower cylinder 300 through 8 oil filtering holes 302 at the outer edge of the oil pan 301 and 4 oil filtering holes 302 on the disc surface. The cleaned air after the multiple stage filtration exits the air outlet 204 and enters the next stage filter or engine air intake 102. An air filter installation limiting block 210 is arranged on the outer wall of the middle cylinder body 200 so as to facilitate installation of the oil bath type air filter.

In summary, the oil bath type air filter provided by the present invention has the pre-filter 100, primarily filters dust in dirty air by centrifugal force, and discharges the dust to the oil bath type air filter, thereby improving the maintenance period of the oil bath type air filter. The pre-filtering device 100 and the lower cylinder 300 can be directly disassembled, and the filtering oil cake in the middle cylinder 200 can be taken out for maintenance and cleaning, so that the maintenance convenience and the maintenance period of the oil bath type air filter can be improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil bath type air filter is characterized by comprising a pre-filtering device, a middle cylinder, a lower cylinder and an air inlet channel;

2. The oil bath air filter according to claim 1, wherein the air inlet passage includes a first conduit and a second conduit;

3. The oil bath air filter according to claim 2, wherein a first seal is provided at a position where the first pipe is connected to the second pipe.

4. The oil bath air filter according to claim 1, wherein the middle cylinder comprises a cylinder upper cover and a middle cylinder body;

5. The oil bath type air filter according to claim 4, wherein a second sealing element is arranged at the position where the upper cylinder cover is clamped with the middle cylinder body.

6. The oil bath air filter according to claim 1, wherein the lower cylinder is snap-fitted with the middle cylinder.

7. The oil bath air filter according to claim 6, wherein a third seal is provided at the position where the lower cylinder is clamped with the middle cylinder.

8. The oil bath air filter according to claim 1, wherein the pre-filter arrangement comprises an upper barrel;

9. The oil bath type air filter according to claim 1, wherein the filter element structure comprises a filter oil cake, and a metal wire filter layer is arranged inside the filter oil cake.

10. The oil bath type air filter according to claim 1, wherein the oil pan is provided with an oil filter hole.