A kind of air filter that can carry out oily vapour separation
Technical field
The present invention relates to a kind of air filter that can carry out oily vapour separation.
Background technology
Air filter base and the oily vapour separate mode of the general gasoline engines widely using at present mainly contain two kinds of knotsStructure: the first is crankcase waste gas and the machine separating through preliminary oily vapour in engine cowl hood or respiratorOil vapour and a certain amount of machine oil oil droplet are incorporated in the oily vapour admission passage of air filter base, and oily vapour entersEnter passage operated by rotary motion above the cylinder air inlet road of air filter base, the problem that this structure exists is,In the crankcase waste gas separating through preliminary oily vapour, contain proportional higher machine oil steam and machine oil oil droplet, machine oilSteam can alter or flow into cylinder air inlet road along oily vapour admission passage with machine oil oil droplet with crankcase waste gas,Can cause thus engine burn oil, silencer emits blue smoke, and exhaust emissions exceeds standard, contaminated environment; The second isBy the crankcase waste gas and machine oil steam and one that separate through preliminary oily vapour in engine cowl hood or respiratorQuantitative machine oil oil droplet is incorporated in the oily vapour admission passage of air filter base, and oily vapour admission passage is arranged onThe below in the cylinder air inlet road of air filter base arranges a back oil road simultaneously below oily vapour admission passageLead to crankcase, check valve be set in back oil road, the negative pressure of utilizing crankcase by unnecessary machine oil by oil returnRoad check valve sucks back crankcase, but the problem that this structure exists be oily vapour admission passage part setting tooMany---there are mazy composite guide air drain, oil baffle, oil-out check valve and valve seat, sealing ring etc., thisSample just causes complex structure, assembling is more complicated, cost is high, and because assembles zero in oily vapour admission passagePart is more, causes exhausted by crankcase resistance to increase, thereby has reduced the power stage of engine.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of air filter that can carry out oily vapour separation, bothCan effectively realize oily vapour and separate, the machine oil of avoiding waste, can reduce again the resistance in oily vapour admission passage, fromAnd reach the object that does not affect engine power output.
For solving above-mentioned existing technical problem, the present invention adopts following scheme: one can be carried out oily vapour and be dividedFrom air filter, comprise base, in base, be provided with You Qi separation chamber, base one side is provided with oily vapour admission passageAnd back oil road, oily vapour admission passage and back oil road are all communicated with You Qi separation chamber, and back oil road place is provided with and oil returnThe back oil road check valve that road fits tightly, base opposite side is provided with the outlet passageway being communicated with You Qi separation chamber,The position of oil vapour admission passage and outlet passageway is all higher than the position of back oil road.
As preferably, You Qi is provided with leakproof oil gluten in separation chamber, and leakproof oil gluten is positioned at oily vapour admission passage and gives vent to anger logicalBetween road, leakproof oil gluten is divided into You Qi separation chamber two parts of connection.
As preferably, the baffle plate that base comprises base body and fits tightly with base body, You Qi separation chamberFor the cavity between base body and baffle plate.
As preferably, base body is provided with a groove towards a side of baffle plate and the profile scope that is positioned at baffle plate,Baffle plate is one to cover the flat board at groove oral area, the cavity that You Qi separation chamber forms for baffle plate and groove, baseBody is provided with towards a side of baffle plate that one end is communicated with groove, the other end extends to the extraneous groove of baffle plate profileRoad, the cavity of outlet passageway for forming between baffle plate and its conduit part covering.
As preferably, the side that is positioned at baffle plate on base body is provided with the cylinder air inlet that is communicated with base body both sidesRoad, what cylinder air inlet road was a projection at base body towards the bulge loop of a side of baffle plate and its in this side is protrudingRise and be highly greater than the height of projection of baffle plate in this side, base body is provided with connection strap towards a side of baffle plate, connectsConnect bar one end and be connected with the lateral wall in cylinder air inlet road, a baffle plate part is closely pasted with cylinder air inlet road lateral wallClose, a part and connection strap fit tightly, and the part between these two parts, cylinder air inlet on baffle plateBetween road and connection strap three, surround a mesopore, conduit extends to mesopore place and is communicated with mesopore.
As preferably, base body has the location sealing muscle fitting tightly with baffle plate towards a side of baffle plate,Location sealing muscle is connected with connection strap.
As preferably, base body is positioned at baffle plate place side and has the location sealing muscle fitting tightly with baffle plate.
As preferably, base body is connected by securing member with baffle plate, on base body and baffle plate, is equipped with and makesThe through hole that securing member passes.
Beneficial effect:
A kind of air filter that can carry out oily vapour separation that the present invention adopts technique scheme to provide, air filterThe oily vapour admission passage of base is a unimpeded passage, does not assemble any part in it, can reduce oily vapour and enterEnter the resistance in passage---reduce exhausted by crankcase resistance, to reduce the impact on engine power output,Oil-gas Separation chamber can effectively be realized oily vapour separation, the machine oil of avoiding waste, reduces exhaust emissions, be alleviated environment dirtDye, simple in structure, reliable operation, cost be low, be convenient to assembling.
Brief description of the drawings
Fig. 1 is figure in bulk of the present invention;
Fig. 2 is the structural representation after assembling of the present invention completes;
Fig. 3 is the cutaway view at A-A place in Fig. 2;
Fig. 4 is the enlarged drawing at B place in Fig. 2;
Fig. 5 is a kind of structural representation of base body in the present invention.
Detailed description of the invention
As shown in Fig. 1 to 5, a kind of air filter that can carry out oily vapour separation, comprises base and is arranged on the endAir filter main body on seat, wherein base comprises base body 1 and baffle plate 3, air filter main body is arranged on baseOn body 1, be positioned at baffle plate 3 place one sides, baffle plate 3 and base body 1 fit tightly and the two between have oneHollow cavity, this place adopts and fits tightly is to seal to prevent in order to realize between baffle plate 3 and base body 1Between the two, leak gas, the cavity between baffle plate 3 and base body 1 as You Qi separation chamber 4 with to entering itIn the waste gas that is attaching oil vapour and machine oil oil droplet carry out coolingly making oily vapour separate that (preferably this cavity is oneFlat cavity, like this waste gas enter after cavity effective with contacting of cavity wall, cooling effect might as well),The side that base body 1 deviates from baffle plate 3 is provided with oily vapour admission passage 5 and back oil road 6, oily vapour admission passage oneEnd is directly communicated with You Qi separation chamber 4, the other end is communicated with engine cowl hood or respirator, and oily vapour enters logicalIn road 5, do not assemble any part, back oil road 6 Yu Youqi separation chambers, one end, 4 directly connections, the other end and songAxle box is communicated with, and is provided with back oil road check valve 2 (same being somebody's turn to do fitting tightly with back oil road 6 inwalls in back oil road 6Place adopts and fits tightly is to prevent gas leakage between back oil road 6 and back oil road check valve 2, can realize sealing),Between base body 1 and baffle plate 3, be provided with outlet passageway 7, outlet passageway 7 connection You Qi separation chambers 4, one end,The other end passes in air filter; Under normal operating condition, the preferably company of outlet passageway 7 and You Qi separation chamber 4Logical position is away from the position at oily vapour admission passage 5 places, the position of oily vapour admission passage 5 and outlet passageway 7All, higher than the position of back oil road 6, back oil road 6 is positioned at the lowermost end of You Qi separation chamber 4, and so oily vapour separatesThe fluid of chamber 4 interior separation can conflux and flow out to the lowermost end of You Qi separation chamber 4 and from back oil road 6; PreferablyBase body 1 is provided with a groove, baffle plate 3 towards a side of baffle plate 3 and the profile scope that is positioned at baffle plate 3Be one to cover the flat board at groove oral area, the cavity that You Qi separation chamber 4 forms for baffle plate 3 and groove, baseBody 1 is provided with towards a side of baffle plate 3 that one end is communicated with groove, the other end extends to baffle plate 3 profile scopesOuter conduit, the cavity of outlet passageway 7 for forming between baffle plate 3 and its conduit part covering; JustUnder normal use state, the lower orientation of the position of preferred oil vapour separation chamber 4 in cylinder air inlet road, oily vapour separatesThe position of chamber 4 and back oil road 6 is all lower than the position of outlet passageway 7, and back oil road check valve 2 fits closely overIn back oil road 6, prevent that back oil road check valve 2 is extruded being subject to the gases at high pressure effect of crankcase.
Back oil road check valve 2 is market general purpose accessory, and its operation principle is: can only rely on from a direction negativePressure overcomes check valve self elastic force effect and open closed gap reaches the object of logical oil or ventilation, and from the contraryDirection is obstructed, and when in the opposite direction check valve bears high pressure, pressure is higher, its closed gap pressurizedPower effect and self elastic force effect closure are tighter.
In You Qi separation chamber 4, be provided with leakproof oil gluten 41, leakproof oil gluten 41 is positioned at oily vapour admission passage 5 and outlet passagewayBetween 7, leakproof oil gluten 41 is divided into You Qi separation chamber 4 two parts of connection. On base body 1, be positioned at baffle plate3 side is provided with the cylinder air inlet road 8 that is communicated with base body 1 both sides, and the gas after air filter is filtered has at leastA part is to enter in cylinder through cylinder air inlet road 8, and preferably cylinder air inlet road 8 is that a projection is at base body 1Bulge loop and its height of projection H in this side towards a side of baffle plate 3 are greater than the projection of baffle plate 3 in this sideHeight h (as shown in Figure 3), base body 1 is provided with connection strap 13 towards a side of baffle plate 3, connection strap 13One end is connected with the lateral wall in cylinder air inlet road 8, and baffle plate 3 parts are tight with cylinder air inlet road 8 lateral walls(baffle plate 3 is by fitting tightly to realize this place's baffle plate 3 and base body 1 with cylinder air inlet road 8 in laminatingFit tightly), a part fits tightly with connection strap 13 that (baffle plate 3 is by fitting tightly with connection strap 13Realize fitting tightly of this place's baffle plate 3 and base body 1), and the portion between these two parts on baffle plate 3Point, surround a mesopore between cylinder air inlet road 8 and connection strap 13 threes, conduit extends to mesopore place alsoBe communicated with mesopore. It is close that base body 1 has towards a side of baffle plate 3 location fitting tightly with baffle plate 3Envelope muscle 12, location sealing muscle 12 is connected with connection strap 13. Base body 1 is positioned at baffle plate 3 place sides to be hadThe location sealing muscle 12 fitting tightly with baffle plate 3. Base body 1 is connected by securing member with baffle plate 3, the endOn seat body 1 and baffle plate 3, be equipped with the through hole 9 that securing member is passed, base body 1 and baffle plate 3 fill jointlyBe fitted on the installation site that engine is corresponding and use securing member fastening, preventing from coming off, ensureing sealing. The present embodimentIn, the profile that the appearance profile of baffle plate 3 and location sealing muscle and cylinder air inlet road and connection strap 13 surroundUnanimously, baffle plate 3 is by fitting tightly further with location sealing muscle and cylinder air inlet road and connection strap 13Ensure sealing.
The course of work is: after engine running, the waste gas in crankcase is in the descending process of engine cylinder pistonCompressed generation high pressure, it is logical that crankcase waste gas can attach machine oil steam and machine oil oil droplet with very fast speedPiping is entered in the oily vapour admission passage of base body 1 by cowl hood or the respirator of engine, then entersIn the You Qi separation chamber of base body 1, crankcase waste gas is attaching oil vapour and machine oil oil droplet is entering oilIn the process of vapour separation chamber, because making temperature start to reduce away from this thermal source of crankcase and Air Flow,Machine oil steam condensation becomes oil droplet, is subject to the leakproof oil gluten in baffle plate 3 and You Qi separation chamber 4 in You Qi separation chamber41 barrier effect, starts to flow downstream in the back oil road 6 of bottom, You Qi separation chamber along wall back oil roadBe communicated with crankcase by pipeline, in the time of piston stroking upward, form negative pressure in crankcase, this negative pressure overcomes oil returnThe closed gap of check valve 2 is opened in the elastic force effect of road check valve 2 self, now, and by You Qi separation chamberOpen completely with the passage of engine crankcase, by the negative pressure in crankcase, the machine oil in back oil road is sucked to bent axleIn case, prevent that machine oil steam or the oil droplet of in cowl hood or respirator, scurrying out from entering by cylinder thereby reachedAir flue enters cylinder and produces burn oil phenomenon. The crankcase waste gas that You Qi separation chamber scurries into is carrying out oily vapour separationAfter, discharge by You Qi separation chamber and the common outlet passageway forming of baffle plate 2, then pass through base body 1Cylinder air inlet road be inhaled into cylinder and again burn, prevent contaminated environment. By the waste gas of scurrying out in crankcase,In the situation that not stopping, enter You Qi separation chamber through oily vapour admission passage smoothly, therefore, to the merit of engineRate output does not impact and loses.