CN105804905A

CN105804905A - Electric spraying filter

Info

Publication number: CN105804905A
Application number: CN201610316067.5A
Authority: CN
Inventors: 胡新林; 张海涛; 田苗法; 施雨; 荣泽龙; 王雪熠
Original assignee: Anhui Technical College of Mechanical and Electrical Engineering
Current assignee: Anhui Technical College of Mechanical and Electrical Engineering
Priority date: 2016-05-13
Filing date: 2016-05-13
Publication date: 2016-07-27
Anticipated expiration: 2036-05-13
Also published as: CN105804905B

Abstract

The invention discloses an electric spraying filter. An oil inlet pipe and an oil outlet pipe are arranged on a filter shell; a filter element is fixed in the filter shell between the oil inlet pipe and the oil outlet pipe through upper and lower filter element end covers; a center pipe is fixed in the filter element between the upper and lower filter element end cover; an upper electric conducting rod and a lower electric conducting rod are respectively inserted from the oil inlet pipe and the oil outlet pipe; the upper electric conducting rod is contacted with the center pipe; the center pipe is connected with the lower filter element end cover; the lower filter element end cover is connected with the lower electric conducting rod; and the upper electric conducting rod and the lower electric conducting rod form an electric conducting circuit through the center pipe and the lower filter element end cover. The filter is simple in structure and low in manufacturing cost, and reliably guarantees outputting of electrostatic charges to prevent accidents caused by aggregation of the charges.

Description

EFI cleaner

Technical field

The present invention relates to automobile filter, particularly relate to conductive structure spiral-flow type EFI gasoline filter.

Background technology

Triboelectrification is ubiquitous physical phenomenon, and this phenomenon also takes place in fuel system.Ionizable impurity in fuel and other ion band positive and negative charge, positive and negative charge is had different affinitys by pipeline material, big just being attracted by inner-walls of duct and adsorb of affinity.When fuel oil is in resting state, negative ions forms even electric layer (quantity of electric charge is equal), is gathered in the near interface between pipeline, is close on a solid surface the ion that (internal layer) be and claims fixed layer；Outer layer ion is movable title mobile layer or diffusion layer.During fuel flow, paired ion is separated, and the charged particle of diffusion layer forms streaming current with liquid flowing, and opposite sex charged particle stays in the duct, and such as pipeline conduction ground connection, the charges of different polarity then flow into the earth.If discharged not in time, very easily producing electric spark, causing fuel oil to burn, even can cause serious explosion accident.Therefore control the generation of electrostatic in fuel oil and eliminate electrostatic, avoiding the existence of this potential burning things which may cause a fire disaster as far as possible, the generation preventing automobile contingency on fire is most important.

Specifically, there are four kinds of states in fuel system in electric charge: separates, transmit, accumulate and scatters and disappears.Separation of charge refers to due to the fuel-system components difference to the affinity of electric charge, and under fuel flow dynamic action, the positive and negative charge of on fuel oil surface, around surface or fuel oil internal turbulence boundary region separates.The transmission of electric charge refers to that separated electric charge is mainly inside flow fuel oil, moves to another part from a system part, produces streaming current in the flowable state.Charge accumulation refers to that separated electric charge is in the accumulation of transmission position, can form partial charge unbalance, and this unbalanced state can continue until electric charge and scatters and disappears speed equal to or more than cumulative speed, it is possible to make the constant minimizing of the quantity of electric charge by forms such as electric discharge, neutralizations.Electric charge scatter and disappear the electric charge referring to lack of equilibrium by ground connection or neutralization opposite charges the process that reduces.

Fuel oil is when fuel tank stores, and when remaining static, will not produce positive and negative charge and separate；Being in driving process, the inwall of fuel oil and fuel tank produces friction, and the fuel oil speed that flows relative to fuel tank is low, and the positive and negative charge of separation is relatively fewer.When fuel oil is by oil filling device eck inflow fuel tank, flow velocity is higher, can produce substantial amounts of electric charge, and electric charge enters fuel tank along with the inflow of fuel oil and accumulates.Generally, major part electric charge can scatter and disappear due to moistening air or fuel tank ground connection.When fuel oil flows in oil transfer pump, injection pump, fuel injector, owing to flow velocity is fast, positive and negative charge separates many, but the electric conductivity of pump and fuel injector material is strong so that lacking of charge accumulation.For some pipelines and connector, owing to diameter is kept substantially relative stable with fuel flow rate, therefore positive and negative charge is separated gradually, transmits, and the mobile charge of generation is gradually increased；If the material of pipeline and connector has good electric conductivity, electric charge also has a degree of scattering and disappearing.For cleaner, the diameter of the filtration fraction of cleaner is much larger than its oil inlet and outlet position diameter, fuel oil produces very big change at cleaner medium velocity, and owing to the impact of structure can produce the internal collision mutually of fuel oil, fuel oil increases with outside contact area simultaneously, these all can cause the sharply separation of electric charge, the charges of different polarity of fixed layer are at cleaner inner accumulation, if the material of cleaner is non-conductive, can not be scattered and disappeared electric charge in time, the electric field that the charges of different polarity stayed produce exceedes the electric potential difference that charge accumulated place material can bear, will be breakdown, produce spark discharge, the accident causing fuel oil is burnt.

At present, EFI gasoline filter housing majority adopts metal material such as iron and steel and aluminum, and only a few luxury car adopts conductive plastics housing, and because conductive plastics price and conductive material compositions control strict, therefore price is relatively costly.Though the cleaner price of metal shell is relatively cheap, but mould input cost is big, and manufacturing process relative complex, weight ratio plastics to weigh.In addition traditional type plastic casing EFI gasoline filter structure, gasoline flows to as shown in Figure 1, when entering cleaner, has part fuel oil directly to spray to end cap, returns backflow, causes turbulent flow phenomenon, increase the pressure loss.

Summary of the invention

The technical problem to be solved is to realize a kind of structure to simplify, use safe cleaner.

To achieve these goals, the technical solution used in the present invention is: EFI filter case is provided with oil inlet pipe and flowline, by upper in filter box body between described oil inlet pipe and flowline, lower filter end cap is fixed with filter element, on described, it is fixed with central canal in filter element between lower filter end cap, upper conducting rod and lower conducting rod it is inserted with respectively by described oil inlet pipe and flowline, described upper conducting rod contact central canal, described central canal connects lower filter end cap, described lower filter end cap connects lower conducting rod, described upper conducting rod and lower conducting rod pass through central canal, lower filter end cap constitutes conducting channel.

Described oil inlet pipe is connected with cyclone ring by central canal, and described central canal is connected with cyclone ring and is placed in the middle of filter element, and oil plant, from described oil inlet pipe entrance cleaner, flow to flowline through the gap of central canal, cyclone ring, filter element, lower filter end cap and inner walls successively.

It is oil-in that described cyclone ring is connected one end with central canal, and the other end is oil-out, is provided with a plurality of pipeline mutually spiraled and constitutes between described oil-in and oil-out, and the direction of described oil-out is towards filter element inwall.

Described filter element filter paper hair side is inside.

Described filter case is plastic casing, and is made up of upper shell and lower house.

Cleaner structure of the present invention is simple, and cost of manufacture is cheap, the output of reliable guarantee electrostatic charge, it is to avoid because of the accident that accumulation causes.

Accompanying drawing explanation

Labelling in the content below every width accompanying drawing in description of the present invention expressed and figure is briefly described:

Fig. 1 is traditional type plastic casing EFI gasoline filter structural representation；

Fig. 2 is EFI cleaner structure schematic diagram；

Fig. 3 is that EFI cleaner gasoline flows to schematic diagram；

Labelling in above-mentioned figure is: 1, upper shell；2, oil inlet pipe；3, upper conducting rod；4, upper filter end cap；5, lower house；6, flowline；7, lower conducting rod；8, lower filter end cap；9；Filter element；10, central canal；11, cyclone ring.

Detailed description of the invention

As shown in Figure 2, EFI filter case is plastic casing, namely common highstrenghtpiston's housing, housing is made up of upper shell 1 and lower house 5, upper shell 1 is provided with oil inlet pipe 2, lower house 5 is provided with flowline 6, produces assembling by upper-lower casing structure is convenient and changes filter element 9, using (nonconductive) common plastics housing can reduce production cost.

nullIt is fixed with filter element 9 by upper filter end cap 4 and lower filter end cap 8 in filter box body between oil inlet pipe 2 and flowline 6，Filter element 9 is hollow columnar structures，It is fixed with central canal 10 in filter element 9 between upper filter end cap 4 and lower filter end cap 8，Introduced by oil-in and have upper conducting rod 3，Introduced by oil-out and have lower conducting rod 7，Upper conducting rod 3 contacts central canal 10，Central canal 10 connects lower filter end cap 8，Lower filter end cap 8 connects lower conducting rod 7，So go up conducting rod 3 and lower conducting rod 7 by central canal 10、Lower filter end cap 8 constitutes conducting channel，Upper conducting rod 3、Lower conducting rod 7、Central canal 10 and lower filter end cap 8 adopt conductive metal material to make，Electric charge within cleaner can be drawn out to the external world by above-mentioned conducting channel，Can the output of reliable guarantee electrostatic charge，Avoid the accident caused when using plastic casing because of accumulation.

Oil inlet pipe 2 is connected with cyclone ring 11 by central canal 10, central canal 10 is connected with cyclone ring 11 and is placed in the middle of filter element 9, oil plant enters cleaner from oil inlet pipe 2, it flow to flowline 6 successively as shown in Figure 3 through the gap of central canal 10, cyclone ring 11, filter element 9, lower filter end cap 8 and inner walls, it is internal that such gasoline directly sprays to filter element 9 central canal 10, through cyclone ring 11, the vertical flow direction turns to effluent, gasoline is guided to flow into the filter paper of sidewall, impurity in fuel oil is scatter uniformly simultaneously, improve the filter efficiency of cleaner, reduce the pressure loss.

It is oil-in that cyclone ring 11 is connected one end with central canal 10, the other end is oil-out, it is provided with a plurality of pipeline mutually spiraled between oil-in and oil-out to constitute, the direction of oil-out is towards filter element 9 inwall, its effect produces eddy flow exactly, changing the circulating direction of gasoline, the oil-out direction of a plurality of pipeline that mutually spirals differs, and so can improve the utilization rate of filter element 9.When filter element 9 is installed, filter element 9 filter paper hair side is inside, it is ensured that filter effect.

Above in conjunction with accompanying drawing, the present invention is exemplarily described; the obvious present invention implements and is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that the design of the method for the present invention carries out with technical scheme; or the not improved design by the present invention and technical scheme directly apply to other occasion, all within protection scope of the present invention.

Claims

1. EFI cleaner, filter case is provided with oil inlet pipe and flowline, by upper in filter box body between described oil inlet pipe and flowline, lower filter end cap is fixed with filter element, it is characterized in that: on described, it is fixed with central canal in filter element between lower filter end cap, upper conducting rod and lower conducting rod it is inserted with respectively by described oil inlet pipe and flowline, described upper conducting rod contact central canal, described central canal connects lower filter end cap, described lower filter end cap connects lower conducting rod, described upper conducting rod and lower conducting rod pass through central canal, lower filter end cap constitutes conducting channel.

2. EFI cleaner according to claim 1, it is characterized in that: described oil inlet pipe is connected with cyclone ring by central canal, described central canal is connected with cyclone ring and is placed in the middle of filter element, oil plant enters cleaner from described oil inlet pipe, flow to flowline through the gap of central canal, cyclone ring, filter element, lower filter end cap and inner walls successively.

3. EFI cleaner according to claim 2, it is characterized in that: it is oil-in that described cyclone ring is connected one end with central canal, the other end is oil-out, is provided with a plurality of pipeline mutually spiraled and constitutes between described oil-in and oil-out, and the direction of described oil-out is towards filter element inwall.

4. EFI cleaner according to claim 3, it is characterised in that: described filter element filter paper hair side is inside.

5. the EFI cleaner according to claim 1,2,3 or 4, it is characterised in that: described filter case is plastic casing, is made up of upper shell and lower house.