CN209925053U

CN209925053U - Oil-gas separation device of filter plate oil-driven engine

Info

Publication number: CN209925053U
Application number: CN201821531088.XU
Authority: CN
Inventors: 韦福观; 朱雄; 覃星念; 赵宁宁; 叶双超; 余晓强
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2020-01-10
Anticipated expiration: 2028-09-14

Abstract

The utility model provides a filter plate oil drives formula engine oil-gas separation device, include: the device comprises a cylinder head cover, a filtering hole type separating device and a primary separating device, wherein the filtering hole type separating device and the primary separating device are arranged in a mounting groove in the cylinder head cover, the mounting groove is provided with an air inlet used for receiving an oil-gas mixture in a crankshaft box, the mounting groove is also provided with an exhaust hole used for exhausting separated waste gas, and the cylinder head cover, the filtering hole type separating device and the primary separating device are combined to form a bent oil-gas channel; the oil-gas separation device of the filter plate oil-drive engine can accelerate oil-gas mixture, separated oil drops flow out through the oil return cavity, the separation efficiency is high, and the emission standard of the national six-engine can be met.

Description

Oil-gas separation device of filter plate oil-driven engine

Technical Field

The utility model belongs to the technical field of the oil-gas separation, concretely relates to filter plate oil drives formula engine oil-gas separation device.

Background

Oil gas generated during the operation of an engine enters a combustion chamber to participate in combustion, oil contained in the oil gas cannot be completely combusted, but flows into a crankcase together with waste gas through a piston ring, after the oil gas enters the crankcase, the oil vapor of the part of the oil gas is condensed and diluted, the performance is reduced, the pressure in the crankcase is increased when combustible mixed gas and the waste gas enter the crankcase, the oil leaks from a crankshaft oil seal, a gasket and the like, and the pollution to the atmosphere in the operation process of the engine is increased, so that the oil gas removed by the engine is separated by integrating an oil-gas separator in a cylinder head cover, the traditional cylinder head cover can only be separated once, and the effect cannot be expected.

Chinese utility model patent as publication No. CN205559013U "a cylinder head cover", including the cylinder head cover body, cylinder head cover body inboard is formed with oil gas preseparation cavity, and this oil gas preseparation cavity is equipped with preseparation air inlet and preseparation gas outlet in advance, follows in the oil gas preseparation cavity the preseparation air inlet arrives the preseparation gas outlet is equipped with in proper order along vertical direction interval arrangement's a plurality of transverse partition plate and is labyrinth interval arrangement's a plurality of longitudinal baffle along the horizontal direction, forms the labyrinth oil gas passageway of intercommunication preseparation air inlet and preseparation gas outlet between transverse partition plate and the longitudinal baffle to it has oil and gas separator to integrate at the cylinder head cover lateral wall.

For example, the active oil-gas separator in the patent of chinese invention with publication number CN104265402B is driven by high-pressure lubricating oil, and is an oil-driven active separator, which can actively separate the oil-gas mixture in the crankcase, but only the active separation device has low separation efficiency and cannot meet the emission standard of six countries.

Through the above, the core of the oil-gas pre-separation of the cylinder head cover in the prior art is the labyrinth oil-gas channel formed between the transverse partition plate and the longitudinal partition plate, but the oil-gas separation capability of the single-layer structure is poor, and the separation efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art's defect, provide a new filter plate oil drive formula engine oil-gas separation device, can effectively separate oil drop of oil-gas mixture species, separation efficiency is high moreover, does not need the periodic maintenance renew cartridge, can satisfy six engine requirements in the country.

The utility model aims at realizing through the following technical scheme:

the utility model provides a filter plate oil drives formula engine oil-gas separation device, include: the oil-gas separator comprises a filter hole type separating device and a primary separating device which are arranged in an installation groove in the cylinder head cover, and an oil-gas driven type oil-gas separator arranged outside the cylinder head cover; the mounting groove is provided with an air inlet used for receiving an oil-gas mixture in the crankcase, the mounting groove is also provided with an exhaust hole used for exhausting separated waste gas, and the exhaust hole is connected to the oil-drive oil-gas separator through a pipeline; the oil-gas mixture flows in from the air inlet, firstly flows through the primary separation device for primary oil-gas separation, and then flows through the filter hole type separation device for oil-gas accelerated separation; the cylinder head cover, the filter hole type separating device and the primary separating device are combined to form a bent oil-gas channel, and the primary separating device comprises: the baffle plate comprises a first curved baffle plate, a second curved baffle plate, a first partition plate, a second partition plate, a third partition plate, a fourth partition plate, a fifth partition plate and a sixth partition plate, wherein the first curved baffle plate and the second curved baffle plate are arranged on a bottom plate; the filter-hole type separation device comprises: a coarse filtering orifice plate and a coarse filtering baffle plate which are arranged on the bottom plate in parallel.

In one embodiment, a first oil return cavity, a second oil return cavity, a third oil return cavity, a fourth oil return cavity and a fifth oil return cavity are further arranged on the bottom plate; after the oil-gas mixture enters from the air inlet, part of oil drops are separated under the action of the first partition plate, and the separated oil drops are discharged through the first oil return cavity; after the oil-gas mixture flows through the second partition plate and the third partition plate, under the action of impact force, part of separated oil drops are discharged through the second oil return cavity; after the oil-gas mixture flows through the fourth partition plate and the fifth partition plate, under the action of impact force, part of separated oil drops are discharged through the third oil return cavity; after the oil-gas mixture flows through the sixth partition plate, under the action of impact force, part of separated oil drops are discharged through the fourth oil return cavity; and then, the oil-gas mixture flows through the filtering hole type separating device, and under the action of impact force, part of separated oil drops are discharged through the fifth oil return cavity.

A coarse filtering hole plate in the filtering hole type separating device is provided with a coarse filtering hole for accelerating oil-gas mixture; in one embodiment, the rough filtering baffle is provided with a filtering rib for colliding and separating oil drops and guiding the oil drops to the fifth oil return cavity, and in another embodiment, the rough filtering baffle is provided with a needle-shaped projection part for increasing the contact area of oil and gas collision, and the needle-shaped projection part can effectively prevent the oil drops from being secondarily crushed due to high-speed collision, so that the oil and gas separation efficiency is improved; the coarse filtration baffle is non-confined open structure (the oil-gas mixture of being convenient for flows), the fifth returns oil chamber and sets up the oil droplet that is used for discharging the collection in the below of coarse filtration orifice plate and coarse filtration baffle.

In one embodiment, the filter hole type separation device further comprises a curved plate arranged on the bottom plate and used for collision separation of oil drops and a sixth oil return cavity used for discharging and collecting the oil drops, and the curved plate is further provided with two filter ribs used for guiding the oil drops to the sixth oil return cavity.

In one embodiment, the interval of coarse filtration orifice plate and coarse filtration baffle is 2 ~ 5mm, according to the air input size of inlet port, the aperture of coarse filtration hole is 3 ~ 6mm, the number of coarse filtration hole is 10 ~ 45, makes the velocity of flow control through the coarse filtration orifice plate at 5 ~ 8m/s, and the coarse filtration orifice plate oil gas mixture that flows through is effectual with coarse filtration baffle striking separation oil drops at this velocity of flow within range.

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

the oil-gas separation device of the filter plate oil-driven engine can accelerate oil-gas mixture, large oil drops can be separated through the primary separation device, and the separation efficiency can be further improved through the filter hole type separation device; in addition, this filter plate oil-drive engine oil-gas separation device can also predetermine the specification (including aperture size and filtration pore number) of thick filtration pore according to the size of air input to this velocity of flow after the guarantee oil-gas mixture accelerates promotes the efficiency that the striking separation drips.

Drawings

Embodiments of the invention are further described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a filter plate oil-driven engine oil-gas separation device according to an embodiment of the present invention;

fig. 2 is a schematic three-dimensional structure diagram of a filter plate oil-driven engine oil-gas separation device (a bottom plate is not shown) according to an embodiment of the invention;

FIG. 3 is a schematic view of the construction of a coarse strainer plate and baffle according to one embodiment of the present invention;

fig. 4 is a schematic structural diagram of an oil-driven oil-gas separator according to an embodiment of the present invention;

fig. 5 is a schematic three-dimensional structure of a coarse filtration baffle with needle-like protrusions according to an embodiment of the present invention.

In the drawing, 100 is a cylinder head cover, 101 is a mounting groove, 102 is an air inlet, 103 is an air outlet, 201 is a bottom plate, 202 is a first curved baffle, 203 is a second curved baffle, 204 is a first partition, 205 is a second partition, 206 is a third partition, 207 is a fourth partition, 208 is a fifth partition, 209 is a sixth partition, 210 is a coarse filter hole plate, 211 is a coarse filter baffle, 212 is a first oil return chamber, 213 is a second oil return chamber, 214 is a third oil return chamber, 215 is a fourth oil return chamber, 216 is a fifth oil return chamber, 217 is a sixth oil return chamber, 218 is a curved plate, 220 is a coarse filter hole, 221 is a filter rib, 222 is a needle-shaped protrusion, 400 is an oil-driven oil-gas separator, 402 is an exhaust gas inlet, 401, 403 is a mixed gas outlet, and 404 is an oil return port.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail by the following embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The embodiment of the utility model provides a filter plate oil-drive type engine oil-gas separation device, which comprises a filter hole type separation device and a primary separation device which are arranged in a mounting groove in a cylinder head cover, and an oil-drive type oil-gas separator which is arranged outside the cylinder head cover; the primary separation device can separate part of oil drops at the air inlet stage of the oil-gas mixture, the oil-gas mixture flows through the primary separation device and then enters the filter hole type separation device, the oil drops are discharged through the oil return pipe after accelerated collision separation is carried out in the filter hole type separation device, and the separated waste gas is conveyed to the oil-drive oil-gas separator through the exhaust hole to carry out active oil-gas separation. As shown in fig. 1 and 2, the cylinder head cover 100 is provided with a mounting groove 101 for mounting a primary separating device and a filtering hole type separating device, the mounting groove 101 is provided with an air inlet 102 for receiving an oil-air mixture in a crank case of an engine and an air outlet 103 for discharging separated exhaust gas, the air outlet 103 is connected to an exhaust gas inlet 401 of an oil-driven oil-gas separator 400 through a pipeline, the cylinder head cover 100, the filtering hole type separating device and the primary separating device are combined to form a curved oil-gas channel, the primary separating device comprises a first curved baffle 202 and a second curved baffle 203 which are arranged on a bottom plate 201, and a first partition 204, a second partition 205, a third partition 206, a fourth partition 207, a fifth partition 208 and a sixth partition 209 which are arranged on the bottom plate 201 in parallel for collision separation of oil drops, and the first curved baffle 202, the second curved baffle 203, the fifth partition 208 and the sixth partition 209, The first baffle plate 204, the second baffle plate 205, the third baffle plate 206, the fourth baffle plate 207, the fifth baffle plate 208 and the sixth baffle plate 209 enclose a curved oil-gas channel together, and when an oil-gas mixture flows through the primary separation device, part of oil drops are primarily separated under the action of the baffle plates; the filtering hole type separation device comprises a coarse filtering hole plate 210 and a coarse filtering baffle 211, wherein the coarse filtering hole plate 210 is arranged on a bottom plate 201 in parallel and used for accelerating oil-gas mixture, and the coarse filtering baffle 211 is used for colliding and separating oil drops; after being separated by the filter hole type separation device and the primary separation device, the oil-gas mixture is conveyed to a waste gas inlet 401 of an oil-drive oil-gas separator 400 through an exhaust hole 103, the oil-drive oil-gas separator 400 adopts the existing conventional equipment, and as shown in fig. 4, the oil-drive oil-gas separator 400 is further provided with an oil inlet 402, a mixed gas outlet 403 and an oil return opening 404; the oil inlet 402 is used for injecting high-pressure engine oil into a main oil gallery of the engine to push a rotor of the oil-driven oil-gas separator 400 to rotate at a high speed so as to generate a centrifugal force of 2500G, oil drops are further separated from the oil-gas mixture entering from the waste gas inlet 401 under the action of a huge centrifugal force, the separated oil drops flow back to an oil pan of the engine through the oil return port 404, the separated waste gas is introduced into an air inlet pipe of the engine through the mixed gas outlet 403 to enter a combustion chamber for combustion, and finally passive and active separation of the oil-gas mixture in the crankcase is achieved, so that the separation effect reaches the emission standard of the national.

In one embodiment, the bottom plate 201 is further provided with a first oil return chamber 212, a second oil return chamber 213, a third oil return chamber 214, a fourth oil return chamber 215 and a fifth oil return chamber 216 for discharging collected oil drops; after the oil-gas mixture enters from the air inlet 102, part of oil drops are separated under the action of the first partition plate 204, and the separated oil drops are discharged through the first oil return cavity 212; after the oil-gas mixture flows through the second partition 205 and the third partition 206, under the action of impact force, part of separated oil drops are discharged through the second oil return cavity 213; then after the oil-gas mixture flows through the fourth partition 207 and the fifth partition 208, under the action of impact force, part of separated oil drops are discharged through the third oil return cavity 214; finally, after the oil-gas mixture flows through the sixth partition 209, under the action of impact force, part of separated oil drops are discharged through the fourth oil return cavity 215; subsequently, the oil-gas mixture flows through the filter hole type separating device, the oil-gas mixture is accelerated through the coarse filter hole plate 210 and then collides and separates with the coarse filter baffle 211, and part of separated oil drops are discharged through the fifth oil return cavity 216, so that the separated oil drops are treated.

The coarse filter hole plate 210 is provided with a coarse filter hole 220 for performing primary acceleration on the oil-gas mixture. In one embodiment, as shown in fig. 3, the coarse filter baffle 211 is provided with a filter rib 221 for separating large oil droplets by collision and guiding the large oil droplets to the fifth oil return chamber 216; in yet another embodiment, as shown in fig. 5, a needle-shaped protrusion 222 for increasing the contact area of oil-gas collision is arranged on the coarse filtration baffle 211, and the needle-shaped protrusion 222 can effectively adsorb large oil drops colliding with the coarse filtration baffle 211 at a high speed and guide the oil drops to the fifth oil return chamber 216, so that secondary crushing of the large oil drops due to high-speed collision (splashing is easily generated by the collision of the large oil drops) is prevented, and the oil-gas separation efficiency is improved; fifth returns oil chamber 216 sets up and is used for discharging the oil droplet of collecting in the below of coarse filtration orifice plate 210 and coarse filtration baffle 211, coarse filtration baffle 211 is non-confined open structure (be convenient for form oil gas passageway), and the oil gas mixture flows through behind the acceleration of coarse filtration orifice plate 210 and collides with coarse filtration baffle 211, and the oil droplet will flow into fifth returns oil chamber 216 through one strain rib 221, and remaining oil gas mixture flows through the opening part (oil gas passageway) outflow of coarse filtration baffle 211.

In one embodiment, if the air intake amount of the air intake hole 102 is 60L/min, the aperture of the coarse filter hole 220 is set to 3mm, the number of the coarse filter holes 220 is set to 27, and the distance between the coarse filter hole plate 210 and the coarse filter baffle 211 is set to 2mm, so that the flow rate passing through the coarse filter hole plate 210 is controlled to be about 5.2m/s, and at this time, the oil-gas mixture flowing through the coarse filter hole plate 210 has a good effect of colliding with the coarse filter baffle 211 to separate large oil droplets under the setting of the flow rate and the distance; in another embodiment, if the air intake amount of the air intake hole 102 is 100L/min, the aperture of the coarse filter hole 220 is set to 6mm, the number of the coarse filter holes 220 is set to 10, and the distance between the coarse filter hole plate 210 and the coarse filter baffle 211 is set to 3mm, so that the flow rate passing through the coarse filter hole plate 210 is controlled to be about 5.3m/s, and at this time, the oil-gas mixture flowing through the coarse filter hole plate 210 has a good effect of colliding with the coarse filter baffle 211 to separate large oil droplets under the setting of the flow rate and the distance; in another embodiment, if the intake air amount of the intake hole 102 is 150L/min, the aperture of the coarse filter hole 220 is set to 5mm, the number of the coarse filter holes 220 is set to 25, and the distance between the coarse filter hole plate 210 and the coarse filter baffle 211 is set to 5mm, so that the flow rate passing through the coarse filter hole plate 210 is controlled to be about 5.1m/s, and at this time, the oil-gas mixture flowing through the coarse filter hole plate 210 has a good effect of colliding with the coarse filter baffle 211 to separate large oil droplets under the setting of the flow rate and the distance; in another embodiment, if the air intake amount of the air intake hole 102 is 270L/min, the aperture of the coarse filter hole 220 is set to 6mm, the number of the coarse filter holes 220 is set to 20, and the distance between the coarse filter hole plate 210 and the coarse filter baffle 211 is set to 4mm, so that the flow rate passing through the coarse filter hole plate 210 is controlled to be about 8m/s, and at this time, the oil-gas mixture flowing through the coarse filter hole plate 210 has a good effect of colliding with the coarse filter baffle 211 to separate large oil droplets under the setting of the flow rate and the distance; in another embodiment, if the intake air amount of the intake hole 102 is 270L/min, the aperture of the coarse filter hole 220 is set to 4mm, the number of the coarse filter holes 220 is set to 45, and the distance between the coarse filter hole plate 210 and the coarse filter baffle 211 is set to 4mm, so that the flow rate passing through the coarse filter hole plate 210 is controlled to be about 8m/s, and at this time, the oil-gas mixture flowing through the coarse filter hole plate 210 has a good impact on the coarse filter baffle 211 to separate large oil droplets under the setting of the flow rate and the distance.

In an embodiment, with continuing reference to fig. 1 and 2, the perforated strainer separator further includes a curved plate 218 disposed on the bottom plate 201 for separating oil droplets by collision and a sixth oil return chamber 217 for discharging collected oil droplets, wherein the curved plate 218 is further provided with two filter ribs (not shown) for separating oil droplets by collision and guiding the oil droplets to the sixth oil return chamber 217; the oil-gas mixture impacts the curved plate 218, oil drops flow into the sixth oil return cavity 217 through the two filter ribs, and the rest of the oil-gas mixture flows into the exhaust hole 103 through the upper part (oil-gas channel) of the curved plate 218, so that pre-separation of the oil-gas mixture in the crankcase is completed.

Compared with the prior art, the oil-gas separation device of the filter plate oil-driven engine can accelerate oil-gas mixture, separated oil drops flow out through the oil return cavity, and separation efficiency is high; the specifications of the coarse filter holes (including the pore size and the number of the filter holes) can be preset according to the air inflow, so that the accelerated flow rate is guaranteed, the efficiency of separating oil drops by impact is improved, and finally the national emission standard can be met.

Reference in the specification to "various embodiments," "some embodiments," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with a feature, structure, or characteristic of one or more other embodiments without limitation, as long as the combination is not logical or operational. Additionally, the various elements of the drawings of the present application are merely schematic illustrations and are not drawn to scale.

Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be within the spirit and scope of the invention.

Claims

1. A filter plate oil-driven engine oil-gas separation device comprises: the oil-gas separator comprises a filter hole type separating device and a primary separating device which are arranged in an installation groove in the cylinder head cover, and an oil-gas driven type oil-gas separator arranged outside the cylinder head cover; the mounting groove has been seted up inlet port and exhaust hole, the exhaust hole is connected to oil-drive formula oil-gas separator through the pipeline, cylinder head cover, filtration pore formula separator and primary separator make up and form oil gas passageway, its characterized in that:

the preliminary separation device comprises: the baffle plate comprises a first curved baffle plate, a second curved baffle plate, a first partition plate, a second partition plate, a third partition plate, a fourth partition plate, a fifth partition plate and a sixth partition plate, wherein the first curved baffle plate and the second curved baffle plate are arranged on a bottom plate; the filter-hole type separation device comprises: a coarse filtration pore plate and a coarse filtration baffle plate which are arranged on the bottom plate in parallel; the bottom plate is also provided with a first oil return cavity, a second oil return cavity, a third oil return cavity, a fourth oil return cavity and a fifth oil return cavity; a coarse filtering hole is formed in a coarse filtering hole plate in the filtering hole type separating device, a filtering rib is arranged on a coarse filtering baffle, the coarse filtering baffle is of a non-closed opening structure, and a fifth oil return cavity is arranged below the coarse filtering hole plate and the coarse filtering baffle; the filter hole type separation device further comprises a curved plate and a sixth oil return cavity, wherein the curved plate is arranged on the bottom plate, and the curved plate is further provided with two filter ribs.