CN209586467U - A kind of strainer gas drive formula oil-gas separating device of engine - Google Patents

Abstract

The utility model provides a kind of strainer gas drive formula oil-gas separating device of engine, including the pre-separate device being arranged in valve mechanism cover, the pre-separate device offers air inlet and gas vent, the valve mechanism cover and pre-separate device combine to form gas channel, the pre-separate device includes: the sieve plate being arranged on bottom plate, it is arranged in parallel in crude separation device and thin separator on bottom plate, the thin separator is located at crude separation device rear, and the gas vent is arranged at thin separator rear；The strainer gas drive formula oil-gas separating device of engine can carry out secondary acceleration to gas mixture, separate larger oil droplet and small oil droplet respectively and flowed out by oil back chamber, separative efficiency is high；In the absorption of small oil droplet, filter core, there is no need to regularly replace filter core, is able to solve periodic replacement maintenance issues since the impact force of secondary acceleration does not have residue blocking.

Description

A kind of strainer gas drive formula oil-gas separating device of engine

Technical field

The utility model belongs to Oil-gas Separation technical field, and in particular to a kind of strainer gas drive formula engine oil gas separation dress It sets.

Background technique

The high-temperature fuel gas that engine generates at work can be scurried into crankcase by the gap between piston group and cylinder, Cause gas blowby.The ingredient of gas blowby is unburned fuel vapor, vapor and exhaust gas etc..Water vapor condensation dilutes machine in machine oil Oil reduces the service performance of machine oil；Sulfur dioxide in exhaust gas encounters air oxidation and generates sulfuric acid, and the oxidation of machine oil is accelerated to become Matter will lead to the corrosion and accelerated wear test of engine part；Gas blowby can also make the hypertonia of crankcase and destroy crankcase Sealing, is lost engine oil leakage；Accelerate the aging of machine oil, reduces reliability.Therefore, it is necessary to using crankcase ventilation system to altering Gas is controlled.Gas blowby can carry a large amount of oil gas, machine oil is caused to be lost, deteriorate simultaneously when flowing through crankcase ventilation system Discharge, it is therefore necessary to oil gas be separated, machine oil loss is reduced.By gs-oil separator being integrated in valve mechanism cover come to hair The oil gas that motivation excludes is separated, and traditional valve mechanism cover can only carry out single separation, and effect can not reach expected.

Such as a kind of Chinese utility model patent " valve mechanism cover " of Publication No. CN205559013U, including valve mechanism cover sheet Body, cylinder head cover body inside are formed with oil gas pre-separation chamber, and the oil gas pre-separation chamber is equipped with pre-separation air inlet and in advance Gas outlet is separated, is successively arranged from the pre-separation air inlet to the pre-separation gas outlet along vertical in oil gas pre-separation room The spaced multiple lateral partitions in direction and in the horizontal direction be in the spaced multiple longitudinal baffles of labyrinth type, lateral partitions The mazy gas channel for being connected to pre-separation air inlet and pre-separation gas outlet is formed between longitudinal baffle, and in cylinder head Cover lateral wall is integrated with gs-oil separator.By the above content it can be found that valve mechanism cover oil gas pre-separation in the prior art Core is the mazy gas channel formed between lateral partitions and longitudinal baffle, but its single layer structure Oil-gas Separation ability Difference, can not separate fine oil droplets, also cannot achieve passive type separation and active isolated combination, be unable to satisfy engine state six The requirement of discharge.

Such as the Chinese invention patent " independent external hanging type multistage gs-oil separator assembly " of Publication No. CN102705040B, it is A kind of gas drive formula active separator can carry out active separation to the gas mixture in crankcase, but only with active point It is unable to satisfy six discharge standard of state from device, can not also be classified processing super large oil droplet, larger oil droplet and fine oil droplets.

It is interior such as the Chinese invention patent application " oil and gas separating system built in valve mechanism cover " of Publication No. CN108049937A Set gs-oil separator, comprising: housing ontology and the labyrinth cavity and bottom cover that the housing ontology side is set, the labyrinth chamber One end of body is provided with the outgoing gas connection tube extended to outside housing, and top offers respirator socket；It is equipped in the labyrinth chamber body Coarse filtration orifice plate, winding type rectifier structure, refined filtration orifice plate and every position plate.By the above content it can be found that cylinder in the prior art Housing oil-gas pre-separation device is equipped with coarse filtration orifice plate and winding type rectifier structure, can be used for Oil-gas Separation, but super large oil droplet The oil droplet of 10um (diameter be greater than) is easy to mix with larger oil droplet (referring to that droplet diameter is 2~10um), and do not have oil droplet absorption with Diversion effect, the droplet diameter that will lead into refined filtration orifice plate is still very big, (refers to that droplet diameter is 0.1 for handling small oil droplet ~2um) there is very big influence；Winding type rectifier structure disclosed in the prior art can not solve gas mixture and touch at a high speed Oil droplet second-time breakage (collision is splashed) problem generated when hitting, oil droplet can not adsorb back after flowing through collision winding type rectifier structure It receives, can still be exported as gas mixture flows to, separative efficiency is low.

Utility model content

The purpose of the utility model is to overcome the defects of the above-mentioned prior art, provide the new partition gas drive formula of one kind and start Machine oil air separation can be classified separation super large oil droplet, larger oil droplet and fine oil droplets, and separative efficiency is high, moreover it is possible to solve Oil droplet adsorption recovery and collision splash the problem of, also do not need periodic maintenance replacement filter core, can be achieved at the same time passive type with Active separation is able to satisfy six engine calls of state.

The purpose of this utility model is achieved through the following technical solutions:

The utility model provides a kind of strainer gas drive formula oil-gas separating device of engine, comprising: is arranged in valve mechanism cover Interior pre-separate device, and the gas drive formula gs-oil separator outside valve mechanism cover is set；The pre-separate device offers For receiving the air inlet of gas mixture and the gas vent being discharged for the exhaust gas after separating, the gas vent in crankcase It is equipped with the escape pipe of connection gas drive formula gs-oil separator, the valve mechanism cover and pre-separate device combine to form gas channel； The pre-separate device includes: the sieve plate being arranged on bottom plate, and the air inlet is arranged in sieve plate, the oil in crankcase Gas mixture is flowed into from the air inlet in sieve plate, due to the effect of sieve plate, when gas mixture air inlet, and part larger oil droplet meeting It collides sieve plate and flows back；The first oil back chamber on the first filter opening plate being arranged in parallel on bottom plate and the first filter baffle, bottom plate With the crude separation device of the first oil return pipe composition under it, the crude separation device is located at sieve plate rear, for mixed to oil gas Object is closed to carry out accelerating collision further separation larger oil droplet；The second filter opening plate, filter core and the second filter gear being arranged in parallel on bottom plate The thin separator of the second oil back chamber on plate, bottom plate and the second oil return pipe composition under it, the thin separator is located at thick Separator rear further separates small oil droplet for again speed up colliding to gas mixture, the gas vent setting At thin separator rear, the exhaust gas after separation is delivered to gas drive formula gs-oil separator by escape pipe by the gas vent.

The coarse filtration hole for being accelerated to gas mixture is provided on the first filter opening plate in the crude separation device. In one embodiment, it is provided on the first filter baffle and filters rib for the one of water conservancy diversion oil droplet to the first oil back chamber；Again In one embodiment, the needle-shaped lug boss for increasing oil gas making contact area is provided on the first filter baffle, it is described Needle-shaped lug boss can effectively prevent oil droplet since high velocity impact causes second-time breakage, improve oil-gas separation efficiency.Described first The lower section of the first filter baffle is arranged in oil back chamber, and the first filter baffle is the hatch frame of non-close so as to gas mixture The bottom of the first oil back chamber is arranged in flowing, first oil return pipe.

In one embodiment, the second filter opening plate in the thin separator, filter core and the second filter baffle are snugly into each other Ground is arranged on bottom plate；The fine filtering hole for carrying out secondary acceleration to gas mixture, institute are provided on the second filter opening plate It states and is provided on the second filter baffle for colliding the small oil droplet of separation and the small oil droplet of water conservancy diversion to the two of the second oil back chamber filters ribs, it is described The setting of second oil back chamber filters baffle rear second, and the second filter baffle is the hatch frame of non-close, second oil return The bottom of the second oil back chamber is arranged in pipe.

In one embodiment, being additionally provided in first oil return pipe and the second oil return pipe prevents exhaust gas recoil from entering pre- point Umbrella shape oil return valve from device, can be effectively prevented influences oil gas pre-separation efficiency because of exhaust gas recoil.

In one embodiment, the material of the filter core is any in non-woven fabrics, felt, glass fibre and synthetic fibers It is a kind of.

In one embodiment, the spacing of the first filter opening plate and the first filter baffle is 2~5mm, according to the air inlet of air inlet Size is measured, the aperture in the coarse filtration hole can be set to 3~6mm, and the number in the coarse filtration hole is set as 10~45, makes to pass through The flow control of first filter opening plate flows through the first filter opening leaf fat gas mixture and filters in the flow rates with first in 5~8m/s The effect that baffle hits separation larger oil droplet is good.

In one embodiment, according to the air inflow size of air inlet, the aperture in the fine filtering hole can be set to 2~ The number of 3mm, the fine filtering hole are set as 8~54, make to flow through by the flow control of the second filter opening plate in 15~30m/s The effect that second filter opening leaf fat gas mixture separates small oil droplet with the second filter baffle shock in the flow rates is good.

Compared with the prior art, the advantages of the utility model are:

The strainer gas drive formula oil-gas separating device of engine is capable of the sucking of stop portions larger oil droplet in the charging stage, also Gas mixture can be accelerated twice, separate larger oil droplet and small oil droplet respectively and be flowed out by oil back chamber, separative efficiency It is high；In the absorption of small oil droplet, for filter core since the impact force of secondary acceleration does not have residue blocking, there is no need to regularly replace Filter core is able to solve periodic replacement maintenance issues；The strainer gas drive formula oil-gas separating device of engine can also be according to air inflow Size preset the specification (including pore size and filter opening number) in coarse filtration hole and fine filtering hole, with this ensure it is primary accelerate with it is secondary Flow velocity after acceleration promotes the efficiency for hitting separation oil droplet；In addition, the strainer gas drive formula oil-gas separating device of engine can incite somebody to action Passive type separation is combined with active separate, and realization oil droplet and exhaust gas are sufficiently separated.

Detailed description of the invention

The embodiments of the present invention are described further referring to the drawings, in which:

Fig. 1 is the valve mechanism cover schematic diagram of internal structure according to the utility model one embodiment；

Fig. 2 is the three dimensional structure diagram according to the pre-separate device of the utility model one embodiment；

Fig. 3 is the planar structure schematic diagram according to the pre-separate device of the utility model one embodiment；

Fig. 4 is the structural schematic diagram according to the sieve plate of the utility model one embodiment；

Fig. 5 is to be illustrated according to the three-dimensional structure of the first filter opening plate of the utility model one embodiment and the first filter baffle Figure；

Fig. 6 is that the three-dimensional structure for being equipped with needle-shaped lug boss according to the first of the utility model one embodiment the filter baffle is illustrated Figure；

Fig. 7 is the three-dimensional structure according to the second filter opening plate of the utility model one embodiment, filter core and the second filter baffle Schematic diagram；

Fig. 8 is the structural schematic diagram according to the valve mechanism cover escape pipe of the utility model one embodiment；

Fig. 9 is the structural schematic diagram according to the gas drive formula gs-oil separator of the utility model one embodiment.

In figure, 100 be valve mechanism cover, and 200 be pre-separate device, and 201 be bottom plate, and 202 be sieve plate, and 203 be the first filter Orifice plate, 204 be the first filter baffle, and 205 be the second filter opening plate, and 206 be filter core, and 207 filter baffle for second, and 208 be the first oil return Chamber, 209 first oil return pipes, 210 be the second oil back chamber, and 211 be the second oil return pipe, and 212 be air inlet, and 213 be gas vent, 215 It is a filter rib for coarse filtration hole, 216,217 be fine filtering hole, and 218 be two filter ribs, and 219 be escape pipe, and 400 be gas drive formula oil gas Separator, 401 be exhaust gas entrance, and 402 be compressed gas entrance, and 403 be mixed gas outlet, and 404 be oil return opening.

Specific embodiment

In order to make the purpose of this utility model, technical solution and advantage are more clearly understood, and pass through tool below in conjunction with attached drawing The utility model is further described in body embodiment.It should be appreciated that specific embodiment described herein is only to explain The utility model is not used to limit the utility model.

A kind of strainer gas drive formula oil-gas separating device of engine in an embodiment of the present invention, there is provided, including setting Pre-separate device in valve mechanism cover, and the gas drive formula gs-oil separator outside valve mechanism cover is set；The pre-separation Device offers air inlet and gas vent, which can be in gas mixture charging stage separate section oil droplet, so Accelerated collision to separate twice in pre-separate device afterwards, and oil droplet is discharged by oil return pipe；The gas drive formula oil gas point It is used for further Oil-gas Separation from device, promotes separative efficiency.Fig. 1 is to be used according to the valve mechanism cover of the utility model one embodiment It is set in the installation fixing position for providing pre-separate device, as shown in Figure 1, Figure 2 and Figure 3, which fills equipped with pre-separation 200 are set, the pre-separate device 200 includes:

The sieve plate 202 being arranged on bottom plate 201, the air inlet 212 are arranged in sieve plate 202 (such as Fig. 3, Fig. 4 institute Show) for sucking gas mixture in engine crankcase, gas mixture is when entering pre-separate device 200, due to strainer The effect of plate 202, part larger oil droplet (oil droplet that diameter is greater than 10um) can collide sieve plate 202 and flow back, remaining air-fuel mixture Object can enter pre-separate device 200 by air inlet 212；

The first oil return being arranged in parallel on the first filter opening plate 203 and the first filter baffle 204, bottom plate 201 on bottom plate 201 The crude separation device of chamber 208 and the first oil return pipe 209 composition under it, the crude separation device are located at 202 rear of sieve plate, use Larger oil droplet (referring to that droplet diameter is 2~10um) in processing gas mixture；The second filter opening being arranged in parallel on bottom plate 201 Plate 205, filter core 206 and the second filter baffle 207, the second oil back chamber 210 on bottom plate 201 and 211 groups of the second oil return pipe under it At thin separator, the thin separator is located at crude separation device rear, for handling the small oil droplet in gas mixture (referring to that droplet diameter is 0.1~2um)；The gas vent 213 be arranged in thin separator rear for be discharged separation oil droplet after Exhaust gas, the air inlet 212, thin separator, crude separation device and gas vent 213 constitute gas channel；The gas vent 213 On be additionally provided with escape pipe 219 (as shown in Figure 8) for gas mixture to be discharged, the escape pipe 219 connects gas vent 213 (not shown) is simultaneously pierced by valve mechanism cover 100, and the setting of the escape pipe 219 can lead the gas mixture after pre-separation Enter the exhaust gas entrance 401 of gas drive formula gs-oil separator 400, the gas drive formula gs-oil separator 400 is using existing routine Equipment (such as cyclone separator), as shown in figure 9, the gas drive formula gs-oil separator 400 be additionally provided with compressed gas entrance 402, Mixed gas outlet 403 and oil return opening 404, after gas mixture enters gas drive formula gs-oil separator 400 via exhaust gas entrance 401 High velocity impact is carried out, oil droplet is separated further out；The compressed gas entrance 402 is for sucking the pressure after engine booster Contracting gas overcomes collision to separate required resistance to push jet pump to generate negative pressure, and the oil droplet after separation passes through oil return opening 404 flow back into engine sump tank, and the exhaust gas after separating oil droplet passes through mixed gas with the gas for entering compressed gas entrance 402 Outlet 403 is introduced into engine air inlet tube and enters combustion chambers burn, is finally reached the passive type for crankcase oils gas mixture It is separated with active, separating effect is made to reach six engine emission standard of state.

As shown in figure 5, the first filter opening plate 203 and the first filter baffle 204 in the crude separation device are arranged in parallel in bottom (Fig. 3 is referred to) on plate 201；The coarse filtration for once being accelerated to gas mixture is provided on the first filter opening plate 203 Hole 215.In one embodiment, it is provided on the first filter baffle 204 and (refers to that droplet diameter is for colliding separation larger oil droplet 2~10um) simultaneously water conservancy diversion larger oil droplet is to a filter rib 216 of the first oil back chamber 208, and the setting of the first oil back chamber 208 is first Filter the lower section of baffle 204, the first filter baffle 204 is the hatch frame (convenient for forming gas channel) of non-close, described the The bottom of the first oil back chamber 208 is arranged in one oil return pipe 209；Gas mixture flows through after the acceleration of the first filter opening plate 203 with One filter baffle 204 is hit, and larger oil droplet will flow into the first oil back chamber 208, remaining gas mixture by a filter rib 216 Flow through opening portion (gas channel) outflow of the first filter baffle 204；In yet another embodiment, as shown in fig. 6, described first The needle-shaped lug boss 220 for increasing oil gas making contact area, needle-shaped 220 energy of lug boss are provided on filter baffle 204 Enough effectively absorption high velocity impacts first filter the larger oil droplet of baffle 204 and by oil droplet water conservancy diversion to the first oil back chamber 208, prevent larger oil droplet Since high velocity impact causes second-time breakage (larger oil droplet collision is easy to produce splashing), oil-gas separation efficiency is improved, larger oil droplet is logical It crosses needle-shaped lug boss 220 and flows into the first oil back chamber 208, remaining gas mixture flows through the opening portion of the first filter baffle 204 (gas channel) outflow.

In one embodiment, as the air inflow of air inlet 212 be 60L/min, the aperture in the coarse filtration hole 215 is set as 3mm, the number in the coarse filtration hole 215 are set as 27, the spacing setting of the first filter opening plate 203 and the first filter baffle 204 For 2mm, make through the flow control of the first filter opening plate 203 in about 5m/s, at this point, flowing through 203 gas mixture of the first filter opening plate The effect for separating larger oil droplet with the first filter shock of baffle 204 under the setting of the flow velocity and spacing is good；In yet another embodiment, If the air inflow of air inlet 212 is 100L/min, the aperture in the coarse filtration hole 215 is set as 6mm, in the coarse filtration hole 215 Number is set as 10, and the spacing of the first filter opening plate 203 and the first filter baffle 204 is set as 3mm, makes through the first filter opening plate 203 flow control is in about 6m/s, at this point, flowing through 203 gas mixture of the first filter opening plate under the setting of the flow velocity and spacing The effect for separating larger oil droplet with the first filter shock of baffle 204 is good；In yet another embodiment, as the air inflow of air inlet 212 is 150L/min, the aperture in the coarse filtration hole 215 are set as 5mm, and the number in the coarse filtration hole 215 is set as 25, and described first The spacing of filter opening plate 203 and the first filter baffle 204 is set as 5mm, makes through the flow control of the first filter opening plate 203 in about 5m/ S divides at this point, flowing through 203 gas mixture of the first filter opening plate and hitting under the setting of the flow velocity and spacing with the first filter baffle 204 Effect from larger oil droplet is good；In yet another embodiment, if the air inflow of air inlet 212 is 270L/min, the coarse filtration hole 215 Aperture be set as 6mm, the number in the coarse filtration hole 215 is set as 20, the first filter opening plate 203 and the first filter baffle 204 spacing is set as 4mm, makes through the flow control of the first filter opening plate 203 in about 8m/s, at this point, flowing through the first filter opening plate The effect that 203 gas mixtures separate larger oil droplet with the first filter shock of baffle 204 under the setting of the flow velocity and spacing is good；Again In one embodiment, if the air inflow of air inlet 212 is 270L/min, the aperture in the coarse filtration hole 215 is set as 3mm, described The number in coarse filtration hole 215 is set as 45, and the spacing of the first filter opening plate 203 and the first filter baffle 204 is set as 4mm, makes By the flow control of the first filter opening plate 203 in about 8m/s, at this point, flowing through 203 gas mixture of the first filter opening plate in the flow velocity And under the setting of spacing with first filter baffle 204 hit separate larger oil droplet effect it is good.

In one embodiment, the second filter opening plate 205, filter core 206 as shown in Fig. 3, Fig. 7, in the thin separator With second filter baffle 207 it is snugly into each other be arranged on bottom plate 201；It is provided on the second filter opening plate 205 for oil gas Mixture carries out the fine filtering hole 217 of secondary acceleration, effect when gas mixture flows through the second filter opening plate 205, in fine filtering hole 217 Lower gas mixture has carried out secondary acceleration, and gas mixture can carry out high speed impact, the filter core 206 to the filter core 206 Lower part is hatch frame convenient for forming gas channel, and the filter core 206 is for adsorbing the small oil after the secondary acceleration of gas mixture Drop (refers to that droplet diameter is 0.1~2um), and wherein the material of filter core 206 can be fine for non-woven fabrics, felt, glass fibre or synthesis Dimension, filter core 206 using these materials absorption oil droplet effect it is good, and filter core 206 secondary acceleration high speed impact effect under, Surface will not assemble residue, therefore can exempt periodic replacement maintenance and (directly adopt filter pulp in the prior art and carry out oil gas point From though efficiency is high, maintenance filter pulp need to be regularly replaced, and maintenance cost is higher)；It is arranged on the second filter baffle 207 Have for colliding the small oil droplet of separation and two filter ribs 218 of the small oil droplet of water conservancy diversion to the second oil back chamber 212, the second filter baffle 207 lower part is the hatch frame (forming gas channel) of non-close, and convenient for the flowing of gas mixture, gas mixture is flowed through After filter core 206 under the effect of impact of the second filter baffle 207, small oil droplet flows into the second oil back chamber by two filter ribs 218, remaining Gas mixture enters next stage separator by the hatch frame (gas channel) of the second filter baffle 207；Implement at one In example, if the air inflow of air inlet 212 is 60L/min, the aperture in the fine filtering hole 217 is set as 2mm, the fine filtering hole 217 Number be set as 18, make through the flow control of the second filter opening plate 205 in about 18m/s, at this point, flowing through the second filter opening plate 205 gas mixtures impact filter core 206 under the flow velocity, filter core 206 adsorb after small oil droplet gas mixture under the flow velocity after It is continuous to hit the second filter baffle 207, preferable small oil droplet separating effect can be obtained；In yet another embodiment, such as air inlet 212 Air inflow be 60L/min, the aperture in the fine filtering hole 217 is set as 3mm, and the number in the fine filtering hole 217 is set as 8, Make through the flow control of the second filter opening plate 205 in about 18m/s, at this point, flowing through 205 gas mixture of the second filter opening plate in the stream Speed is lower to impact filter core 206, and gas mixture continues to hit the second filter baffle 207 under the flow velocity after filter core 206 adsorbs small oil droplet, Preferable small oil droplet separating effect can be obtained；In yet another embodiment, as the air inflow of air inlet 212 be 120L/min, The aperture in the fine filtering hole 217 is set as 2.5mm, and the number in the fine filtering hole 217 is set as 20, makes through the second filter opening plate 205 flow control is in about 20m/s, at this point, flow through 205 gas mixture of the second filter opening plate impacts filter core 206 under the flow velocity, Gas mixture continues to hit the second filter baffle 207 under the flow velocity after filter core 206 adsorbs small oil droplet, can obtain preferable small Oil droplet separating effect；In yet another embodiment, if the air inflow of air inlet 212 is 180L/min, the hole in the fine filtering hole 217 Diameter is set as 2.5mm, and the number in the fine filtering hole 217 is set as 23, makes through the flow control of the second filter opening plate 205 about 27m/s, at this point, flow through 205 gas mixture of the second filter opening plate impacts filter core 206 under the flow velocity, filter core 206 adsorbs small oil droplet Gas mixture continues to hit the second filter baffle 207 under the flow velocity afterwards, can obtain preferable small oil droplet separating effect；Again In one embodiment, if the air inflow of air inlet 212 is 260L/min, the aperture in the fine filtering hole 217 is set as 3mm, described The number in fine filtering hole 217 is set as 24, makes through the flow control of the second filter opening plate 205 in about 27m/s, at this point, flowing through Two filter opening plates, 205 gas mixture impacts filter core 206 under the flow velocity, and gas mixture is at this after filter core 206 adsorbs small oil droplet Continue to hit the second filter baffle 207 under flow velocity, preferable small oil droplet separating effect can be obtained；In yet another embodiment, such as The air inflow of air inlet 212 is 270L/min, and the aperture in the fine filtering hole 217 is set as 2mm, the number in the fine filtering hole 217 54 are set as, is made through the flow control of the second filter opening plate 205 in about 30m/s, at this point, flowing through 205 oil gas of the second filter opening plate Mixture impacts filter core 206 under the flow velocity, and gas mixture continues shock under the flow velocity after filter core 206 adsorbs small oil droplet Two filter baffles 207, can obtain preferable small oil droplet separating effect.

In one embodiment, it with continued reference to Fig. 2, is additionally provided in first oil return pipe 209 and the second oil return pipe 211 anti- Only exhaust gas recoil enters the umbrella shape oil return valve (not shown) of pre-separate device 200, can be effectively prevented due to exhaust gas recoil Influence oil gas pre-separation efficiency.

From above-described embodiment as can be seen that compared with prior art, according to the strainer gas drive formula of the utility model embodiment Then oil-gas separating device of engine can carry out two to gas mixture in gas mixture charging stage separate section oil droplet Secondary acceleration separates larger oil droplet and small oil droplet respectively and is flowed out by oil back chamber, and separative efficiency is high；It can also be according to the big of air inflow The specification (including pore size and filter opening number) in small default coarse filtration hole and fine filtering hole ensures primary accelerate and secondary acceleration with this Flow velocity afterwards promotes the efficiency for hitting separation oil droplet；In addition, the strainer gas drive formula engine oil gas of the utility model embodiment point Gas drive formula gs-oil separator can also be combined from device, realizes the active separation of gas mixture, further promotes oil gas point From efficiency, it is finally able to satisfy the standard of the discharge of state six.

What the reference in this specification for " some embodiments ", " one embodiment " or " embodiment " etc. referred to is knot Special characteristic described in the embodiment, structure or property is closed to be included at least one embodiment.Therefore, phrase is " each In a embodiment ", " in some embodiments ", " in one embodiment " or " in embodiment " etc. throughout the specification The appearance of each place not necessarily refers to identical embodiment.In addition, special characteristic, structure or property can be at one or more It is combined in any way as suitable in a embodiment.Therefore, in conjunction with shown in one embodiment or description special characteristic, structure Or property wholly or partly can be combined unlimitedly with the feature of one or more other embodiments, structure or property, As long as the combination is not non-logicality or cannot work.In addition, each element in illustrations is just to illustrating It is bright, it is not necessarily drawn to scale.

It is thus described several aspects of at least one embodiment of the utility model, it will be understood that art technology Various changes, modification and improvement are easy to carry out for personnel.This changes, modifications and improvement are intended to the essence in the utility model In mind and range.

Claims (6)

1. a kind of strainer gas drive formula oil-gas separating device of engine, comprising: the pre-separate device in valve mechanism cover is set, and Gas drive formula gs-oil separator outside valve mechanism cover is set；The pre-separate device offers air inlet and gas vent, described Gas vent is equipped with the escape pipe of connection gas drive formula gs-oil separator, and the valve mechanism cover and pre-separate device combine to form oil gas Channel, which is characterized in that the pre-separate device includes:

The sieve plate being arranged on bottom plate, the air inlet are arranged in sieve plate；

The first filter opening plate being arranged in parallel on bottom plate and the first filter baffle, the first oil back chamber on bottom plate and first time under it The crude separation device of oil pipe composition, the crude separation device are located at sieve plate rear；The first filter opening in the crude separation device It is provided with coarse filtration hole on plate, needle-shaped lug boss is provided on the first filter baffle, the first oil back chamber setting is in the first filter The lower section of baffle, the first filter baffle are the hatch frame of non-close, and the first oil back chamber is arranged in first oil return pipe Bottom；

It is arranged in parallel in the second filter opening plate on bottom plate, under filter core and the second filter baffle, the second oil back chamber and its on bottom plate The thin separator of second oil return pipe composition, the thin separator are located at crude separation device rear, and the gas vent setting exists Thin separator rear.

2. strainer gas drive formula oil-gas separating device of engine as described in claim 1, it is characterised in that: the thin separator In the second filter opening plate, filter core and second filter baffle it is snugly into each other be arranged on bottom plate；It is provided on the second filter opening plate Fine filtering hole is provided with two filter ribs on the second filter baffle, and the second oil back chamber setting filters baffle rear second, described Second filter baffle is the hatch frame of non-close, and the bottom of the second oil back chamber is arranged in second oil return pipe.

3. strainer gas drive formula oil-gas separating device of engine as described in claim 1, it is characterised in that: the material of the filter core For any one in non-woven fabrics, felt, glass fibre or synthetic fibers.

4. strainer gas drive formula oil-gas separating device of engine as described in claim 1, it is characterised in that: in first oil return Pipe and the second oil return pipe are additionally provided with the umbrella shape oil return valve for preventing exhaust gas recoil from entering pre-separate device.

5. strainer gas drive formula oil-gas separating device of engine as described in claim 1, it is characterised in that: the first filter opening plate and The spacing of one filter baffle is 2~5mm, and the aperture in the coarse filtration hole is 3~6mm, and the number in the coarse filtration hole is 10~45.

6. strainer gas drive formula oil-gas separating device of engine as claimed in claim 2, it is characterised in that: the hole in the fine filtering hole Diameter is 2~3mm, and the number in the fine filtering hole is 8~54.