CN116943332A

CN116943332A - Fuel multistage filtering device

Info

Publication number: CN116943332A
Application number: CN202211099005.5A
Authority: CN
Inventors: 程建彬; 张宇; 邓青林; 应晓渭; 陈旭
Original assignee: Zhejiang Weitai Automobile Parts Co ltd
Current assignee: Zhejiang Weitai Automobile Parts Co ltd
Priority date: 2022-04-14
Filing date: 2022-09-09
Publication date: 2023-10-27
Also published as: CN116950822A

Abstract

The application discloses a fuel multistage filtering device. The fuel oil multistage filtering device comprises a shell, a first-stage filtering body and a second-stage filtering body which are respectively arranged in and outside the shell, wherein the shell is provided with a first channel for fuel oil to flow in and at least two hollowed-out surfaces; the first-stage filter body comprises a supporting fence, a particulate filter medium sleeved on the periphery of the supporting fence and end covers connected with two ends of the particulate filter medium, a non-filtering side dirt containing cavity is formed, the non-filtering side dirt containing cavity is communicated with the first channel, and a filtering side cleaning cavity is formed by the first-stage filter body and the shell; the secondary filter body is provided with a second channel for fuel to flow out to the outside of the secondary filter body so as to block water and lead oil. The fuel multistage filtering device can ensure that more particulate matter filtering media and water collecting media are arranged in a limited space, the effective filtering area of the fuel multistage filtering device is increased, and the filtering capacity and the service life of a filter element in a unit volume are improved.

Description

Fuel multistage filtering device

Technical Field

The application relates to the technical field of fuel filtration, in particular to a fuel multistage filtration device of a fuel supply system of an internal combustion engine.

Background

Water and particulate impurities in fuel are extremely detrimental to the fuel supply system of an internal combustion engine: the existence of water can cause poor lubrication, so that the oil nozzle and the high-pressure pump are worn and corroded; particulate impurities (e.g., dust, metal powder, etc.) can accelerate wear of the high pressure pump and cause clogging of the fuel injector.

A fuel filter having an oil-water separation function is generally provided in a fuel supply system to clean fuel and remove water and particulate impurities in the fuel. With the progress of technology, the development of the internal combustion engine to the high efficiency and energy saving direction requires that the filter meet the light weight design and have higher filtering performance and service life.

Current fuel filters mostly use cylindrical filters to filter particulate matter within a tubular housing and water separators, which reduce particulate matter and moisture in the fuel prior to delivery to the engine, are typically positioned in a concentric orientation relative to the filter media in a central portion of the tubular housing. However, the use of such cylindrical filter spaces in flat and narrow space arrangements for vehicles is not efficient, and the filter volume is usually made relatively small, which makes it difficult to meet the long life, efficient filtration performance requirements of modern engine fuel filters.

In the prior art, patent US10253738B2 discloses a filter assembly for filtering diesel fuel for use in a diesel engine, which is shaped to have a relatively flat cuboid configuration and utilizes one side of the cuboid for fuel filtration. The filter designed by the scheme is characterized in that the filter media are not arranged on other surfaces of the cuboid for filtering, so that the filtering area is not maximized in a limited space, the unit area flow rate, the resistance and the filtering area of fuel passing through the filter media are in a strong negative correlation as known by hydrodynamics and filtering knowledge, under the condition that the fuel flow rate is fixed, the unit area flow rate and the flow resistance are increased by reducing the filtering area, the filtering capacity of the filter is directly reduced by increasing the unit area flow rate and the flow resistance, and meanwhile, the capacity of intercepting and containing impurities and the oil-water separation efficiency of the filter are reduced by reducing the filtering area.

Disclosure of Invention

The application provides a fuel multistage filtering device, which aims to solve the technical problems of poor filtering performance and short service life of a filter element in unit volume.

The technical purpose of the application is achieved by the following technical scheme.

A fuel multi-stage filtration device disposed within an external assembly, comprising:

the shell is provided with a first channel into which fuel flows and at least two hollowed-out surfaces;

the first-stage filter body comprises a supporting fence, a particulate filter medium sleeved on the periphery of the supporting fence and end covers connected with two ends of the particulate filter medium, a non-filtering side dirt containing cavity is formed, the non-filtering side dirt containing cavity is communicated with the first channel, and a filtering side cleaning cavity is formed by the first-stage filter body and the shell; the method comprises the steps of,

the secondary filter body is arranged on the outer side of the shell and used for blocking water and oil, and the secondary filter body is provided with a second channel for enabling fuel oil to flow out to the outer side of the secondary filter body.

Optionally, the housing includes a cover plate and a base, the base is provided with an opening, and the opening is closed by the cover plate.

Optionally, each hollowed-out surface is arranged on the cover plate and the base;

the hollowed-out surface is inlaid with and covered by a water collecting medium for coalescing water and filtering out fuel oil in the cleaning cavity of the filtering side.

Optionally, one end cover of the first-stage filter body is provided with an oil through port communicated with the first channel.

Optionally, the sealing mode of the cover plate and the base comprises one or a combination of welding, adhesive, buckling and clamping.

Optionally, a fastening piece is arranged at the edge of the cover plate, a fastening piece is arranged at the opening of the base, and the fastening piece is correspondingly fastened with the fastening piece, so that the cover plate is sealed on the base.

Optionally, the supporting fence has a plurality of transverse ribs, and each transverse rib is staggered at intervals.

Optionally, the secondary filter body comprises a tubular water blocking medium and a pipe rack for fixing the water blocking medium, wherein the pipe rack is installed on an installation clamping piece on one side of the shell.

Optionally, the installation fastener is the clamp, the pipe support card is established on the clamp.

According to the technical scheme, a first-stage filter body is arranged in a shell with at least two hollowed-out surfaces, and particulate filter media of the first-stage filter body are shaped through a supporting fence and an end cover, so that a non-filtering side dirt containing cavity is formed; during filtration, fuel enters a non-filtration side dirt holding cavity from a first channel connected with the outside, enters a filtration side cleaning cavity after passing through a particulate matter filter medium, completes filtration of particulate pollutants of fuel, coalesces fine particulate water in the fuel through a water collecting medium inlaid on a hollowed-out surface of the shell, enters a secondary filter body, and finally, the clean fuel is sent to an engine injection system by utilizing the water collecting medium to form interception of water and separation of water in the fuel, wherein the separation of water in the fuel is completed by natural sedimentation of water in the fuel. According to the fuel multistage filtering device, more particulate matter filtering media and water collecting media can be arranged in a limited space, the effective filtering area is increased, the unit area flow rate of fuel passing through the filter element can be reduced, the resistance (energy consumption) of the fuel passing through the filter element is reduced, the particulate matter filtering efficiency is improved, more particulate matter impurities can be contained, meanwhile, the unit area flow rate of the fuel passing through the filter element is reduced, the coalescence of water in the fuel is facilitated, the oil-water separation efficiency of the filter element is improved, and the double-lifting effect of the filtering capacity and the service life of the filter element in unit volume is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of one embodiment of a fuel multi-stage filtration device provided by the present application;

FIG. 2 is a perspective view of an embodiment of a fuel multistage filter device according to the present application;

FIG. 3 is a perspective view of the cover plate and the water coalescing media of FIG. 1;

FIG. 4 is a perspective view of the primary filter of FIG. 1;

FIG. 5 is an exploded view of the primary filter of FIG. 1;

FIG. 6 is a perspective view of the support fence of FIG. 5;

FIG. 7 is an exploded view of the secondary filter of FIG. 1;

fig. 8 is a cross-sectional view of the A-A plane of fig. 2.

In the figure: the fuel oil multi-stage filter device comprises a shell body-1, a first channel-11, a hollowed surface-12, a water collecting medium-121, a cover plate-13, a clamping piece-131, a first clamping foot-131 a, a base-14, an opening-141, a buckling piece-142, a second clamping foot-142 a, an installation clamping piece-15, an electric connector-16, a primary filter body-2, a supporting fence-21, a transverse rib-211, a vertical rib-212, a particulate matter filter medium-22, a non-filtration test-221, a filtration side-222, an end cover-23, an oil port-231, a non-filtration side dirt accommodating cavity-24, a filtration side cleaning cavity-25, a secondary filter body-3, a second channel-31, a water blocking medium-32 and a pipe rack-33.

The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

For a better description and illustration of embodiments of the application, reference should be made to one or more of the accompanying drawings, but the additional details or examples used to describe the drawings should not be construed as limiting the scope of any of the inventive, presently described embodiments or preferred modes of carrying out the application.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are positional relationships based on the drawings, are merely for convenience of describing the present application, and do not indicate that the apparatus referred to must have a specific orientation or operate in a specific orientation, and thus should not be construed as limiting the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In view of this, the present application provides a fuel multistage filtering device, and fig. 1-8 show an embodiment of the fuel multistage filtering device according to the present application, referring to fig. 1-8, the fuel multistage filtering device 100 includes a housing 1, a primary filter 2 and a secondary filter 3.

Specifically, referring to fig. 1, the housing 1 is square, a first channel 11 for fuel to flow into the housing 1 is formed on the surface of the housing 1, and two side surfaces of the housing 1 are symmetrically provided with hollowed-out surfaces 12; the primary filter body 2 is installed inside the casing 1, the primary filter body 2 includes a support fence 21, a particulate filter medium 22 sleeved on the periphery of the support fence 21, and end caps 23 connected to two ends of the particulate filter medium 22, where the end caps 23 are used to seal the open sides of the particulate filter medium 22 to form a non-filtration-side dirt-containing chamber 24 inside, and in this embodiment, the non-filtration-side dirt-containing chamber 24 is communicated with the first channel 11 through an opening on the cover plate 13. And the outer periphery of the primary filter body 2, that is, between the filter side 222 and the housing 1, forms a filter side cleaning chamber 25; the secondary filter body 3 is mounted on the outer side of the housing 1 for blocking moisture and passing fuel, and the secondary filter body 3 is provided with a second passage 31 through which fuel flows out to the outside thereof into the engine. The particulate filter medium 22 is a filter paper, and the inside of the particulate filter medium 22 is a non-filtration test 221, and the outside is a filtration side 222.

In filtering, referring to fig. 8, the fuel oil containing impurities enters the non-filtering-side dirt holding cavity 24 from the first channel 11, is filtered out into the filtering-side cleaning cavity 25 after the impurities are removed by the particulate filter medium 22, enters the outer side of the secondary filter body 3 through the hollowed-out surface 12, and is finally pumped into the engine after water blocking. It should be noted that, the hollowed-out surface 12 may have a plurality of hollowed-out surfaces 12 according to the design of the housing 1, and in this embodiment, the housing 1 is square, and at most 6 hollowed-out surfaces may be disposed.

In the technical scheme of the application, a first-stage filter body 2 is arranged in a shell 1 with at least two hollowed-out surfaces, and particulate matter filter media 22 of the first-stage filter body are shaped through a supporting fence 21 and an end cover 23, so that a non-filtering side dirt holding cavity 24 with a plurality of non-filtering sides 221 is formed; during filtration, the fuel enters the filter side cleaning chamber 25 from a plurality of filter sides, enters the secondary filter body 3 through the hollowed-out surfaces 12, and is finally pumped into the engine.

According to the fuel multistage filtering device, more particulate matters filtering medium 22 and water collecting medium 121 can be arranged in a limited space, the effective filtering area is increased, the unit area flow rate of fuel passing through the filter element can be reduced, the resistance of fuel passing through the filter element (the energy consumption required by pumping oil is reduced) is reduced, the particulate matters filtering efficiency is improved, more particulate matters impurities can be contained, meanwhile, the unit area flow rate of fuel passing through the filter element is reduced, the coalescence of water in fuel is facilitated, the oil-water separation efficiency of the filter element is improved, and the double-lifting effect of the filtering capacity and the service life of the filter element in unit volume is achieved.

In some embodiments of the present application, the housing 1 includes at least one cover 13 and a base 14, the base 14 is provided with at least one opening 141 on a side surface thereof, the opening 141 is closed by the cover 13, and the first channel 11 is provided on the base 14. In this embodiment, 1 cover plate 13 is provided, and 1 opening 141 is provided on one side of the base 14; of course, according to the assembly mode of the housing 1, the number of the cover 13 and the number of the openings 141 may be 2 or more, and detailed description thereof will be omitted.

Referring to fig. 1 and 3, each of the hollow surfaces 12 is respectively disposed on the cover 13 and the base 14. In this embodiment, the surfaces of the cover 13 and the base 14 opposite to the cover 13 are hollowed-out surfaces 12, and of course, up to 6 hollowed-out surfaces 12 can be provided on the casing 1 with a square structure, and in this embodiment, 2 are preferable; the hollow surface 12 is provided with a water collecting medium 121, the water collecting medium 121 covers the hollow surface 12 and seals the hollow part of the hollow surface 12, and the water collecting medium 121 can coalesce water and filter out fuel in the filter side cleaning cavity 25. It should be noted that, the water collecting medium 121 may be a nonwoven fabric material, or may be another material capable of absorbing moisture, and the water collecting medium 121 may be integrated with the hollowed-out surface 12 by injection molding, inlay-in-one molding, welding, or glue bonding, where injection molding, inlay-in-one molding may be preferably adopted, so that the structure is more compact.

Referring to fig. 4, one end cap 23 of the primary filter body 2 is provided with an oil through port 231 communicating with the first channel 11, so that fuel enters the non-filtering-side dirt holding chamber 24 from the oil through port 231.

In some embodiments of the present application, the sealing manner between the cover 13 and the base 14 is one of welding, adhesive, fastening, and clamping, or a combination thereof. It should be noted that, the cover 13 and the base 14 are plastic parts. Among them, ultrasonic welding can be preferably used as the welding method.

In some embodiments of the present application, referring to fig. 1, 3 and 8, the edge of the cover 13 is provided with a fastening portion 131, the opening 141 of the base 14 is provided with a fastening portion 142, and the fastening portion 131 is correspondingly fastened to the fastening portion 142, so that the cover 13 is sealed to the base 14. Of course, the fastening portion 131 and the fastening portion 142 may be directly fastened or welded by ultrasonic to achieve sealing, or sealant or sealing element may be added between the fastening portion 131 and the fastening portion 142, refer to fig. 1 and 3, and in order to increase the connection strength between the cover 13 and the base 14, the cover 13 and the base 14 are respectively provided with a plurality of first fastening pins 131a and second fastening pins 142a that are mutually used for fastening, and the first fastening pins 131a and the second fastening pins 142a may be disposed on the inner side or the outer side of the base, so as to form an inner fastening or an outer fastening at this time, refer to fig. 1, and preferably use the inner fastening for more reliable connection and more aesthetic appearance. Referring to fig. 8, the end caps 23 and the two ends of the particulate filter medium 22 may be welded, glued, and heat-cured to seal the openings at the two ends. The preferential use of hot melt welding has higher production efficiency. In addition, the supporting fence 21 is mutually abutted with the end cover 23 in the non-filtering side dirt holding cavity 24; considering that the particulate filter medium 22 is softened under a long-term soaking so as to collapse, the support fence 21 can function as a support.

In an embodiment of the present application, referring to fig. 5, the supporting fence 21 has a plurality of transverse ribs 211, and each transverse rib 211 is staggered and spaced in the vertical direction. In this embodiment, the transverse ribs 211 are parallel to each other and have the same length, and support the particulate filter medium 22 in a flat rectangular structure, which allows the particulate filter medium 22 to have the largest contact area in the limited non-filtering-side dirt holding chamber 24. It should be noted that the supporting fence 21 further has a plurality of vertical ribs 212 integrally formed with each of the transverse ribs 211, and each of the transverse ribs 211 is staggered and distributed on the vertical ribs 212 at intervals to form the supporting fence 21.

In one embodiment of the present application, referring to fig. 5, an end of each of the transverse ribs 211 abuts the particulate filter medium 22 to form a non-filtering-side dirt holding chamber 24. The fuel diffuses into the cavity after entering. Of course, the embodiment of the present application is not limited thereto, and in other embodiments, the transverse ribs 211 on the supporting fence 21 may be disposed to intersect each other, or the particulate filter medium 22 may be stretched into a rectangular parallelepiped structure.

In some embodiments of the present application, referring to fig. 7, the secondary filter 3 includes a tubular water blocking medium 32 and a pipe rack 33, the water blocking medium 32 is an oil-water separation mesh fabric, the pipe rack 33 and the water blocking medium 32 are integrally injection molded, one side of the housing 1 is provided with a mounting clip 15, the pipe rack 33 is mounted on the mounting clip 15, and in this embodiment, the mounting clip 15 is a clip. In addition, the second channel 31 is communicated with the water-blocking medium 32 to send the fuel with water removed into the engine, the second channel 31 comprises a sealing sleeve 311 and a fuel pipe 312, the sealing sleeve 311 is used for being connected with the outside, the fuel pipe 312 is arranged inside the water-blocking medium 32 and is in sealing connection with the pipe frame 33, and the sealing sleeve 311 is buckled with an oil outlet of the fuel pipe 312.

The fuel multistage filtering device 100 is placed in an assembly filter chamber (not shown in the figure) and is connected to the assembly filter chamber by the first passage 11 and the second passage 31, and fuel is pumped to the engine after flowing out from the first passage 11 connected to the assembly filter chamber through the non-filtering side dirt holding chamber 24, the particulate matter filter medium 22, the filtering side cleaning chamber 25, the water collecting medium 121, the secondary filter body 3, and the second passage 31 connected to the assembly filter chamber in this order.

In addition, the assembly filter chamber is provided with a grounding wire and a water level sensor for conducting static electricity. The grounding wire is electrically connected with the electrical connector 16 on the base 14, the electrical connector 16 is electrically connected with one end cover 23 of the primary filter body 2, so as to conduct static electricity generated by fuel oil in the particulate filter medium 22 to the outside, and the end cover 23 is made of conductive material; in addition, the assembly filter chamber is also provided with a valve for draining water, and the valve is arranged in an interlocking manner with the water level sensor so as to deposit water in fuel oil to a certain height and send out a draining alarm for draining treatment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A fuel multi-stage filtration device comprising:

the shell (1) is provided with a first channel (11) into which fuel flows and at least two hollowed-out surfaces (12);

the first-stage filter body (2) is arranged in the shell (1), the first-stage filter body (2) comprises a supporting fence (21), a particulate filter medium (22) sleeved on the periphery of the supporting fence (21), and end covers (23) connected with two ends of the particulate filter medium (22), a non-filtering side dirt containing cavity (24) is formed, the non-filtering side dirt containing cavity (24) is communicated with the first channel (11), and the first-stage filter body (2) and the shell (1) form a filtering side cleaning cavity (25); the method comprises the steps of,

the secondary filter body (3) is arranged on the outer side of the shell (1) and used for blocking water and oil, and the secondary filter body (3) is provided with a second channel (31) for enabling fuel to flow out to the outside of the secondary filter body.

2. The fuel multistage filtration device according to claim 1, wherein the housing (1) comprises a cover plate (13) and a base (14), the base (14) being provided with an opening (141), the opening (141) being closed by the cover plate (13).

3. The fuel multistage filtering device according to claim 2, characterized in that each hollowed-out surface (12) is provided on the cover plate (13) and the base (14);

the hollowed-out surface (12) is inlaid with and covered by a water collecting medium (121) for coalescing water and filtering out fuel oil in the filter side cleaning cavity (25).

4. A fuel multistage filtering device according to claim 2, characterized in that one of the end caps (23) of the primary filtering body (2) is provided with an oil through port (231) communicating with the first passage (11).

5. The fuel multistage filtering device according to claim 2, wherein the sealing of the cover plate (13) and the base (14) comprises one or a combination of welding, gluing, buckling and clamping.

6. The fuel multistage filtering device according to any one of claims 2 to 5, wherein a snap (131) is provided at an edge of the cover plate (13), a snap (142) is provided at an opening (141) of the base (14), and the snap (131) is correspondingly snapped with the snap (142) so that the cover plate (13) is sealed to the base (14).

7. The fuel multistage filter device according to claim 1, wherein the support rail (21) has a plurality of transverse ribs (211), each of the transverse ribs (211) being staggered at intervals.

8. The fuel multistage filtering device according to claim 1, characterized in that the secondary filtering body (3) comprises a tubular water-blocking medium (32) and a pipe rack (33) for fixing the water-blocking medium (32), wherein the pipe rack (33) is mounted on a mounting clamp (15) on one side of the housing (1).