CN209244634U - A kind of filter board type voltage adaptive controlling oil-gas separating device of engine - Google Patents

Abstract

The utility model provides a kind of filter board type voltage adaptive controlling oil-gas separating device of engine, it include: the filter opening formula separator and primary separating device that mounting groove in valve mechanism cover is set, the mounting groove offers the air inlet for receiving gas mixture in crankcase, the mounting groove is additionally provided with the gas vent for the exhaust gas discharge after separating, and the valve mechanism cover, filter opening formula separator and primary separating device combine to form curved gas channel；The filter board type voltage adaptive controlling oil-gas separating device of engine can accelerate gas mixture, and isolated oil droplet is flowed out by oil back chamber, and separative efficiency is high, be able to satisfy six engine emission standard of state.

Description

A kind of filter board type voltage adaptive controlling 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 filter board type voltage adaptive controlling engine oil gas Separator.

Background technique

The oil gas that engine generates at work enters combustion chamber and participates in burning, and the machine oil contained in this part of oil gas is logical It often can't burn completely, but scurried into crankcase together with exhaust gas through piston ring, after entering crankcase, the part machine oil Steam condensation is thinning, performance decline, and combustion mixture and exhaust gas enter in crankcase and can also crankcase pressure be increased Greatly, machine oil increases the pollution in engine operation process to atmosphere, therefore, it is necessary to pass through from crankshaft oil seal, liner etc. leakage It integrates gs-oil separator in valve mechanism cover to separate come the oil gas for excluding engine, traditional valve mechanism cover can only carry out Single separation, 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 in the prior art the core of valve mechanism cover oil gas pre-separation be lateral partitions with The mazy gas channel formed between longitudinal baffle, but its single layer structure Oil-gas Separation ability is poor, low separation efficiency.

Utility model content

The purpose of the utility model is to overcome the defects of the above-mentioned prior art, provide the new filter board type of one kind and adaptively adjust Hydraulic motor gas and oil separating plant can efficiently separate the oil droplet of air-fuel mixture species, and separative efficiency is high, does not need periodically Maintenance replacement filter core, 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 filter board type voltage adaptive controlling oil-gas separating device of engine, comprising: is arranged in gas The filter opening formula separator and primary separating device of mounting groove in cylinder head cover, the mounting groove offer oily in crankcase for receiving The air inlet of gas mixture, the mounting groove be additionally provided with for after separating exhaust gas discharge gas vent, the valve mechanism cover, Filter opening formula separator and primary separating device combine to form curved gas channel, and gas mixture is flowed into from air inlet, first flow Preliminary Oil-gas Separation is carried out through primary separating device, filter opening formula separator is then flowed through and carries out oil gas acceleration separation；It is described just to divide Include: the first shaped form baffle being arranged on bottom plate, the second shaped form baffle from device and is arranged in parallel on bottom plate First partition, second partition, third partition, the 4th partition, the 5th partition and the 6th partition；The filter opening formula separator packet It includes: coarse filtration orifice plate, coarse filtration baffle and the check valve being arranged on coarse filtration orifice plate being arranged in parallel on bottom plate；Due to check valve Setting, when air pressure inside is smaller, check valve is not turned on, and air pressure inside guarantee point is alleviated in check valve conducting when air pressure inside is excessive From effect, so that filter opening formula separator has the characteristic of voltage adaptive controlling.

In one embodiment, the first oil back chamber, the second oil back chamber, third oil back chamber, are additionally provided on the bottom plate Four oil back chambers and the 5th oil back chamber；Gas mixture is after air inlet entrance, and part oil droplet is divided under the action of first partition From the oil droplet after separation is discharged through the first oil back chamber, solves the problems, such as oil extraction；Gas mixture flows through second partition and third partition Afterwards, under the influence of the impact force, the oil droplet being partially separated out is discharged through the second oil back chamber；Gas mixture flow through the 4th partition and After 5th partition, under the influence of the impact force, the oil droplet being partially separated out is discharged through third oil back chamber；Gas mixture flows through After six partitions, under the influence of the impact force, the oil droplet being partially separated out is discharged through the 4th oil back chamber；Then, air-fuel mixture logistics Through filter opening formula separator, under the influence of the impact force, the oil droplet being partially separated out is discharged through the 5th oil back chamber, has reached discharge The effect of oil droplet after separation.

It is provided on coarse filtration orifice plate in the filter opening formula separator for carrying out acceleration coarse filtration to gas mixture Hole；In one embodiment, it is provided on the coarse filtration baffle for colliding separation oil droplet and water conservancy diversion to the one of the 5th oil back chamber Filter rib is provided on the coarse filtration baffle for increasing the needle-shaped convex of oil gas making contact area In yet another embodiment The portion of rising, the needle-shaped lug boss can effectively prevent oil droplet since high velocity impact causes second-time breakage, improve oil-gas separation efficiency； The coarse filtration baffle is the hatch frame (flowing convenient for gas mixture) of non-close, and the 5th oil back chamber is arranged in coarse filtration hole The lower section of plate and coarse filtration baffle is for being discharged the oil droplet being collected into.

In one embodiment, the filter opening formula separator further includes being arranged on bottom plate for colliding separation oil droplet Curved plates and for the 6th oil back chamber for collecting oil droplet to be discharged, the curved plates are additionally provided with for by oil droplet water conservancy diversion to the 6th Two filter ribs of oil back chamber.

In one embodiment, the spacing of the coarse filtration orifice plate and coarse filtration baffle is 2~5mm, according to the air inlet of air inlet Size is measured, the aperture in the coarse filtration hole is 3~6mm, and the number in the coarse filtration hole is 10~45, is made through coarse filtration hole The flow control of plate flows through coarse filtration orifice plate gas mixture and separates in the flow rates with the shock of coarse filtration baffle in 5~8m/s The effect of larger oil droplet is good.

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

The filter board type voltage adaptive controlling oil-gas separating device of engine can accelerate gas mixture, by just dividing Larger oil droplet can be separated from device, filter opening formula separator can further promote separative efficiency；In addition, the filter board type is adaptive Pressure regulation oil-gas separating device of engine can also preset specification (including pore size and the filter in coarse filtration hole according to the size of air inflow Hole number), the flow velocity after gas mixture acceleration is ensured with this, promotes the efficiency for hitting separation oil droplet.

Detailed description of the invention

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

Fig. 1 is the knot according to the filter board type voltage adaptive controlling oil-gas separating device of engine of the utility model one embodiment Structure schematic diagram；

Fig. 2 is according to the pre- filter board type voltage adaptive controlling oil-gas separating device of engine (bottom of the utility model one embodiment Plate is not shown) three dimensional structure diagram；

Fig. 3 is according to the structural schematic diagram of the coarse filtration orifice plate of the utility model one embodiment, coarse filtration baffle and check valve；

Fig. 4 is the structural schematic diagram that fine filtering hole is covered according to the outlet end of the check valve of the utility model one embodiment；

Fig. 5 is the three-dimensional structure signal that needle-shaped lug boss is equipped with according to the coarse filtration baffle of the utility model one embodiment Figure；

Fig. 6 is according to the working principle diagram under the check valve on state of the utility model one embodiment.

In figure, 100 be cylinder head casing, and 101 be mounting groove, and 102 be air inlet, and 103 be venthole, and 201 be bottom plate, 202 For the first shaped form baffle, 203 be the second shaped form baffle, and 204 be first partition, and 205 be second partition, 206 for third every Plate, 207 be the 4th partition, 208 be the 5th partition, 209 be the 6th partition, 210 be coarse filtration orifice plate, 211 be coarse filtration baffle, 212 It is the second oil back chamber for the first oil back chamber, 213,214 be third oil back chamber, and 215 be the 4th oil back chamber, and 216 be the 5th oil back chamber, 217 be the 6th oil back chamber, and 218 be curved plates, and 219 be check valve, and 220 be coarse filtration hole, and 221 filter rib for one, and 222 be needle-shaped convex The portion of rising.

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 filter board type voltage adaptive controlling oil-gas separating device of engine in an embodiment of the present invention, there is provided, should Filter board type voltage adaptive controlling oil-gas separating device of engine includes the filter opening formula separator that mounting groove in valve mechanism cover is arranged in And primary separating device, primary separating device can flow through just in gas mixture charging stage separate section oil droplet, gas mixture Enter filter opening formula separator after separator, carries out accelerating collision separation in filter opening formula separator, and oil droplet is passed through Oil return pipe discharge.As depicted in figs. 1 and 2, valve mechanism cover 100 is equipped with the installation of installation primary separating device and filter opening formula separator Slot 101, the mounting groove 101 offer the air inlet 102 for receiving gas mixture in engine crankcase and are used for By the gas vent 103 of the exhaust gas discharge after separation, the valve mechanism cover 100, filter opening formula separator and primary separating device combination Curved gas channel is formed, the primary separating device includes the first shaped form baffle 202, second being arranged on bottom plate 201 It shaped form baffle 203 and is arranged in parallel on bottom plate 201 and separates the first partition 204 of oil droplet, second partition for collide 205, third partition 206, the 4th partition 207, the 5th partition 208 and the 6th partition 209, the first shaped form baffle 202, Two shaped form baffles 203, first partition 204, second partition 205, third partition 206, the 4th partition 207,208 and of the 5th partition 6th partition 209 surrounds curved gas channel jointly, and gas mixture flows through primary separating device from after the inflow of air inlet 102, Part oil droplet has been come out by initial gross separation under spacer function；Then, gas mixture flows into filter opening formula separator, the filter Cellular type separator includes being arranged in parallel in the coarse filtration orifice plate 210 on bottom plate 201 being used to accelerate gas mixture, being used for The coarse filtration baffle 211 of collision separation oil droplet and the check valve 219 (as shown in Figure 3) being arranged on coarse filtration orifice plate 210, air-fuel mixture When logistics is through filter opening formula separator, gas mixture is accelerated by coarse filtration orifice plate 210, then with coarse filtration baffle 211 into Row collision separation, check valve 219 reaches better separating effect for adjusting air pressure inside, after separating after the completion of separation Exhaust gas is discharged through gas vent 103.

In one embodiment, the first oil back chamber for collected oil droplet to be discharged is additionally provided on the bottom plate 201 212, the second oil back chamber 213, third oil back chamber 214, the 4th oil back chamber 215 and the 5th oil back chamber 216；Gas mixture is from air inlet After hole 102 enters, part oil droplet is separated under the action of first partition 204 first, and the oil droplet after separation is through the first oil back chamber 212 discharges；After subsequent gas mixture flows through second partition 205 and third partition 206, under the influence of the impact force, part point The oil droplet separated out is discharged through the second oil back chamber 213；After subsequent gas mixture flows through the 4th partition 207 and the 5th partition 208, Under the influence of the impact force, the oil droplet being partially separated out is discharged through third oil back chamber 214；Finally, gas mixture flows through the 6th After partition 209, under the influence of the impact force, the oil droplet being partially separated out is discharged through the 4th oil back chamber 215；Then, air-fuel mixture Logistics is accelerated through filter opening formula separator, gas mixture by coarse filtration orifice plate 210, is then carried out with coarse filtration baffle 211 Collision separation, the oil droplet being partially separated out are discharged through the 5th oil back chamber 216.It is provided on the coarse filtration orifice plate 210 for oil The coarse filtration hole 220 that gas mixture is once accelerated.In one embodiment, as shown in figure 3, being set on the coarse filtration baffle 211 It is equipped with for colliding a separation larger oil droplet simultaneously filter rib 221 of the water conservancy diversion larger oil droplet to the 5th oil back chamber 216；In another embodiment In, as shown in figure 5, the needle-shaped lug boss 222 for increasing oil gas making contact area is provided on the coarse filtration baffle 211, The needle-shaped lug boss 222 can effectively adsorb the larger oil droplet of high velocity impact coarse filtration baffle 211 and by oil droplet water conservancy diversion to the 5th time Oil pocket 216 prevents larger oil droplet since high velocity impact causes second-time breakage (larger oil droplet collision is easy to produce splashing), improves oil gas Separative efficiency；Coarse filtration orifice plate 210 is arranged in 5th oil back chamber 216 and the lower section of coarse filtration baffle 211 is collected into for being discharged Oil droplet, the coarse filtration baffle 211 be non-close hatch frame (convenient for forming gas channel), the check valve 219 go out Mouth end is fixed on coarse filtration orifice plate 210, since coarse filtration orifice plate 210 is equipped with coarse filtration hole 220, the outlet end of check valve 219 Meeting covering part coarse filtration hole 220 (as shown in Figure 3, Figure 4), it is smaller in the air pressure that gas mixture flows through filter opening formula separator When (gas mixture flow velocity be less than 8m/s), air pressure, which is not enough to impact, opens check valve 219, and gas mixture can be by unidirectional The unlapped coarse filtration hole 220 of valve 219 is accelerated, air pressure greatly to a certain extent when (gas mixture flow velocity be greater than 8m/s When), air pressure, which is enough to impact, opens check valve 219, and part gas mixture can flow through the coarse filtration hole 220 of the covering of check valve 219, reach The effect for having arrived automatic adjusument internal pressure has ensured the stability of internal impact separation；The principle of the check valve 214 is Under original state, top cover withstands arrival end by spring force, only after inlet port pressure is greater than to a certain degree, top cover pressure Contracting spring makes check valve that (as shown in Figure 6) be connected, and medium can enter the coarse filtration hole covered from outlet end through arrival end and flow out at this time. Gas mixture flows through after coarse filtration orifice plate 210 accelerates to be hit with coarse filtration baffle 211, and oil droplet will be flowed by a filter rib 221 Enter the 5th oil back chamber 216, remaining gas mixture flows through opening portion (gas channel) outflow of coarse filtration baffle 211.

In one embodiment, as the air inflow of air inlet 102 be 60L/min, the aperture in the coarse filtration hole 220 is set as 3mm, the number in the coarse filtration hole 220 is set as 22, and (wherein the outlet end of check valve 219 covers 4, not by check valve 219 Outlet end be covered with 18, gas mixture can pass through 18 uncovered coarse filtration holes 220), the coarse filtration orifice plate 210 It is set as 2mm with the spacing of coarse filtration baffle 211, makes to flow through the flow control of coarse filtration orifice plate 210 by gas mixture about 7.9m/s, air pressure inside is insufficient to allow check valve 219 to be connected at this time, flow through 210 gas mixture of coarse filtration orifice plate in the flow velocity and Larger oil droplet is separated with the shock of coarse filtration baffle 211 under the setting of spacing, preferable separating effect can be obtained；When air inlet 102 When air inflow is promoted to 78L/min from 60L/min, the flow velocity that gas mixture flows through coarse filtration orifice plate 210 is promoted to 10.2m/s, (gas mixture can pass through 22 coarse filtration holes 220) is connected under gas pressure impact in check valve 219, makes gas mixture The flow velocity for flowing through coarse filtration orifice plate 210 is down to 8.4m/s, flows through 210 gas mixture of coarse filtration orifice plate in the setting of the flow velocity and spacing Lower and coarse filtration baffle 211 is hit, and can obtain preferable separating effect；In yet another embodiment, such as the air inlet of air inlet 102 Amount is 105L/min, and the aperture in the coarse filtration hole 220 is set as 6mm, and the number in the coarse filtration hole 220 is set as 10 (wherein The outlet end of check valve 219 covers 2, is not covered with 8 by the outlet end of check valve 219, gas mixture can be by not 8 capped coarse filtration holes 220), the spacing of the coarse filtration orifice plate 210 and coarse filtration baffle 211 is set as 3mm, makes to pass through oil gas Flow control of the mixture flow through coarse filtration orifice plate 210 is in about 7.7m/s, and air pressure inside is insufficient to allow check valve 219 to be connected at this time, It flows through 210 gas mixture of coarse filtration orifice plate and separates larger oil droplet with the shock of coarse filtration baffle 211 under the setting of the flow velocity and spacing, it can To obtain preferable separating effect；When the air inflow of air inlet 102 is promoted to 140L/min from 105L/min, gas mixture The flow velocity for flowing through coarse filtration orifice plate 210 is promoted to 10.3m/s, and (gas mixture can for conducting under gas pressure impact for check valve 219 To pass through 10 coarse filtration holes 220), the flow velocity for making gas mixture flow through coarse filtration orifice plate 210 is down to 8.3m/s, flows through coarse filtration hole 210 gas mixture of plate is hit under the setting of the flow velocity and spacing with coarse filtration baffle 211, can obtain preferable separation effect Fruit；In yet another embodiment, as the air inflow of air inlet 102 be 180L/min, the aperture in the coarse filtration hole 220 is set as 5mm, the number in the coarse filtration hole 220 is set as 24, and (wherein the outlet end of check valve 219 covers 4, not by check valve 219 Outlet end be covered with 20, gas mixture can pass through 20 uncovered coarse filtration holes 220), the coarse filtration orifice plate 210 and the spacing of coarse filtration baffle 211 be set as 5mm, so that the flow control for flowing through coarse filtration orifice plate 210 by gas mixture is existed About 7.6m/s, air pressure inside is insufficient to allow check valve 219 to be connected at this time, flows through 210 gas mixture of coarse filtration orifice plate in the flow velocity And larger oil droplet is separated with the shock of coarse filtration baffle 211 under the setting of spacing, preferable separating effect can be obtained；When air inlet 102 Air inflow when being promoted to 240L/min from 180L/min, the flow velocity that gas mixture flows through coarse filtration orifice plate 210 is promoted to 10.2m/s, check valve 219 are connected (gas mixture can pass through 24 coarse filtration holes 220) under gas pressure impact, make oil gas Mixture flow is down to 8.5m/s through the flow velocity of coarse filtration orifice plate 210, flow through 210 gas mixture of coarse filtration orifice plate the flow velocity and Away from setting under with coarse filtration baffle 211 hit, preferable separating effect can be obtained；In yet another embodiment, such as air inlet 102 air inflow is 200L/min, and the aperture in the coarse filtration hole 220 is set as 6mm, and the number in the coarse filtration hole 220 is set as 20 (wherein the outlet end of check valve 219 covers 4, is not covered with 16 by the outlet end of check valve 219, gas mixture 16 uncovered coarse filtration holes 220 can be passed through), the spacing of the coarse filtration orifice plate 210 and coarse filtration baffle 211 is set as 4mm, Make the flow control for flowing through coarse filtration orifice plate 210 by gas mixture in about 7.4m/s, air pressure inside is insufficient to allow unidirectionally at this time Valve 219 is connected, and flows through 210 gas mixture of coarse filtration orifice plate and hits under the setting of the flow velocity and spacing with coarse filtration baffle 211 and divides From larger oil droplet, preferable separating effect can be obtained；When the air inflow of air inlet 102 is promoted to 270L/min from 200L/min When, the flow velocity that gas mixture flows through coarse filtration orifice plate 210 is promoted to 9.9m/s, and check valve 219 is connected under gas pressure impact (gas mixture can pass through 20 coarse filtration holes 220), the flow velocity for making gas mixture flow through coarse filtration orifice plate 210 is down to 8m/s, It flows through 210 gas mixture of coarse filtration orifice plate to hit under the setting of the flow velocity and spacing with coarse filtration baffle 211, can obtain preferably Separating effect；In yet another embodiment, if the air inflow of air inlet 102 is 230L/min, the aperture in the coarse filtration hole 220 It is set as 4mm, the number in the coarse filtration hole 220 is set as 45, and (wherein the outlet end of check valve 219 covers 5, not unidirectional The outlet end of valve 219 is covered with 40, and gas mixture can pass through 40 uncovered coarse filtration holes 220), the coarse filtration hole The spacing of plate 210 and coarse filtration baffle 211 is set as 4mm, and the flow control for flowing through coarse filtration orifice plate 210 by gas mixture is made to exist About 8m/s, air pressure inside is insufficient to allow check valve 219 to be connected at this time, flow through 210 gas mixture of coarse filtration orifice plate in the flow velocity and Larger oil droplet is separated with the shock of coarse filtration baffle 211 under the setting of spacing, preferable separating effect can be obtained；When air inlet 102 When air inflow is promoted to 300L/min from 230L/min, the flow velocity that gas mixture flows through coarse filtration orifice plate 210 is promoted to 9.9m/ S, check valve 219 are connected (gas mixture can pass through 45 coarse filtration holes 220) under gas pressure impact, make gas mixture The flow velocity for flowing through coarse filtration orifice plate 210 is down to 8.8m/s, flows through 210 gas mixture of coarse filtration orifice plate in the setting of the flow velocity and spacing Lower and coarse filtration baffle 211 is hit, and can obtain preferable separating effect.

In one embodiment, please continue to refer to Fig. 1 and Fig. 2, the filter opening formula separator further includes being arranged in bottom plate It is described curved for colliding the curved plates 218 of separation oil droplet and for the 6th oil back chamber 217 for collecting oil droplet to be discharged on 201 Plate 218 is additionally provided with for colliding separation oil droplet simultaneously two filter rib (not shown)s of the water conservancy diversion to the 6th oil back chamber 217；Oil Gas mixture hits curved plates 218, and oil droplet flows into the 6th oil back chamber 217, remaining gas mixture by two filter ribs The top (gas channel) for flowing through curved plates 218 enters gas vent 103, completes the pre-separation to gas mixture in crankcase.

From above-described embodiment as can be seen that compared with prior art, filter board type according to an embodiment of the present application is adaptive Pressure regulation oil-gas separating device of engine can accelerate gas mixture, separate oil droplet and flowed out by oil back chamber, separation It is high-efficient；The specification (including pore size and filter opening number) that coarse filtration hole can also be preset according to the size of air inflow, is protected with this Flow velocity after barrier acceleration, promotes the efficiency for hitting separation oil droplet, is finally able to satisfy the standard of the discharge of state six.

For the ginseng of " each embodiment ", " some embodiments ", " one embodiment " or " embodiment " etc. in this specification Examine reference is that the special characteristic in conjunction with described in the embodiment, structure or property are included at least one embodiment.Cause This, phrase " in various embodiments ", " in some embodiments ", " in one embodiment " or " in embodiment " etc. exists The appearance of each place not necessarily refers to identical embodiment in the whole instruction.In addition, special characteristic, structure or property can To combine in any way as suitable in one or more embodiments.Therefore, in conjunction with shown in one embodiment or description Special characteristic, structure or property can wholly or partly with the feature, structure or property of one or more other embodiments It unlimitedly combines, as long as the combination is not non-logicality or cannot work.In addition, each element in illustrations is only Only for schematically illustrate, 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 (5)

1. a kind of filter board type voltage adaptive controlling oil-gas separating device of engine, comprising: the filter of mounting groove in valve mechanism cover is arranged in Cellular type separator and primary separating device, the mounting groove offer air inlet and gas vent, the valve mechanism cover, filter opening formula point It combines to form gas channel from device and primary separating device, it is characterised in that:

The primary separating device includes: the first shaped form baffle, the second shaped form baffle and parallel cloth being arranged on bottom plate Set first partition, second partition, third partition, the 4th partition, the 5th partition and the 6th partition on bottom plate；The filter opening formula Separator includes: the coarse filtration orifice plate, coarse filtration baffle and the check valve being arranged on coarse filtration orifice plate being arranged in parallel on bottom plate.

2. filter board type voltage adaptive controlling oil-gas separating device of engine as described in claim 1, it is characterised in that: the bottom plate On be additionally provided with the first oil back chamber, the second oil back chamber, third oil back chamber, the 4th oil back chamber and the 5th oil back chamber.

3. filter board type voltage adaptive controlling oil-gas separating device of engine as claimed in claim 2, it is characterised in that: the filter opening It is provided with coarse filtration hole on coarse filtration orifice plate in formula separator, a filter rib or needle-shaped protrusion are provided on the coarse filtration baffle Portion, the coarse filtration baffle are the hatch frame of non-close, and the outlet end of the check valve is fixed on coarse filtration orifice plate, the described 5th The lower section of coarse filtration orifice plate and coarse filtration baffle is arranged in oil back chamber.

4. filter board type voltage adaptive controlling oil-gas separating device of engine as described in claim 1, it is characterised in that: the filter opening Formula separator further includes the curved plates being arranged on bottom plate and the 6th oil back chamber, and the curved plates are additionally provided with two filter muscle Item.

5. filter board type voltage adaptive controlling oil-gas separating device of engine as claimed in claim 3, it is characterised in that: the coarse filtration The spacing of orifice plate and coarse filtration 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.