阅读说明：本技术 一种曲轴箱通风的油气分离器 (Oil-gas separator ventilated by crankcase ) 是由 夏消消 张少华 雷刚勤 李俊峰 张宗磊 王国峰 于 2020-07-22 设计创作，主要内容包括：本申请公开一种曲轴箱通风的油气分离器,涉及汽车发动机技术领域,所述油气分离器包括：壳体,包括分离腔、进气口、出气口、回油口；多个分隔板,其在所述分离腔内沿竖直方向间隔分布,并与所述壳体的内壁均相连；所述分隔板为锥型结构,其顶部靠近所述出气口设置,所述分隔板的底部边缘开设有第一槽口和第二槽口,所述第一槽口的开口面积大于所述第二槽口,且相邻的两个所述分隔板上的第一槽口和第二槽口均错开分布。本申请提供的曲轴箱通风的油气分离器,在壳体中的分离腔内设置多个分隔板,以使得回油、出气的在壳体中实现,完成油气分离,且该油气分离器的结构简单、紧凑、工作可靠,能够提升混合油气的分离效率。(The application discloses oil and gas separator of crankcase ventilation relates to automobile engine technical field, oil and gas separator includes: the shell comprises a separation cavity, an air inlet, an air outlet and an oil return port; the separation plates are distributed in the separation cavity at intervals along the vertical direction and are connected with the inner wall of the shell; the division board is the tapered structure, and its top is close to the gas outlet sets up, first notch and second notch have been seted up at the bottom edge of division board, the open area of first notch is greater than the second notch, and adjacent two first notch and the equal distribution of staggering of second notch on the division board. The application provides an oil-gas separator of crankcase ventilation sets up a plurality of division boards in the separation intracavity in the casing to make the oil return, give vent to anger realize in the casing, accomplish oil-gas separation, and this oil-gas separator's simple structure, compactness, reliable operation can promote the separation efficiency of mixed oil gas.)

1. A crankcase ventilation oil and gas separator, characterized in that the oil and gas separator comprises:

the shell (1) comprises a separation cavity (10), an air inlet (11), an air outlet (12) and an oil return port (13);

the separation plates (2) are distributed in the separation cavity (10) at intervals along the vertical direction and are connected with the inner wall of the shell (1); division board (2) are the tapered structure, and its top is close to gas outlet (12) set up, first notch (21) and second notch (22) have been seted up at the bottom edge of division board (2), the open area of first notch (21) is greater than second notch (22), and adjacent two first notch (21) and second notch (22) on division board (2) are the distribution of staggering.

2. A crankcase ventilation oil and gas separator as claimed in claim 1 wherein the second slot (22) is located lower on the divider plate (2) than the first slot (21).

3. A crankcase ventilation oil and gas separator as claimed in claim 1 wherein the divider plate (2) is inclined and the second slot (22) is located at the lowest position of the divider plate (2).

4. A crankcase ventilation oil and gas separator as claimed in claim 1 wherein the divider plate (2) is a conical plate.

5. A crankcase ventilation oil and gas separator as claimed in claim 1 wherein the first notch (21) or the second notch (22) are each along a scalloped groove along the bottom edge of the divider plate (2).

6. A crankcase ventilation oil and gas separator as claimed in claim 5 wherein the first slot (21) corresponds to a central angle of not more than 90 ° on the divider plate (2) and the second slot (22) corresponds to a central angle of not more than 30 ° on the divider plate (2).

7. A crankcase ventilation oil gas separator as claimed in claim 1 wherein the distance separating adjacent two of said partitions (2) becomes progressively smaller along said gas inlet (11) to said gas outlet (12).

8. A crankcase ventilation oil and gas separator as claimed in claim 1 wherein, of two adjacent separator plates (2), the top of one separator plate (2) is located in the cavity of the other separator plate (2).

9. A crankcase ventilation gas oil separator as claimed in claim 1 wherein a cooling chamber (16) is provided in the housing (1).

10. A crankcase ventilation air-oil separator as claimed in claim 1, wherein the housing (1) further has an oil return storage chamber (14), the oil return storage chamber (14) is annularly arranged at the bottom of the separation chamber (10), and the bottom of the oil return storage chamber is provided with the oil return port (13).

Technical Field

The application relates to the technical field of automobile engines, in particular to an oil-gas separator for ventilation of a crankcase.

Background

The blow-by gas of the crankcase of the engine is one of the main causes of emission pollution of the automobile, and the effective measure for reducing the emission pollution is to carry out efficient oil-gas separation on the blow-by gas of the crankcase. With advances in engine technology, the oil droplet particle size of crankcase ventilation air mixtures is finer than conventional engines, resulting in a large number of oil particles carried by the crankcase ventilation air being ineffectively separated by currently used separation systems.

At present, the technical requirement of the engine is that the oil-gas separation efficiency of the blow-by gas of the crankcase at least reaches 90%, and the insufficient oil-gas separation efficiency can cause the severe loss of engine oil when the engine operates. Meanwhile, with the continuous and strict requirements of emission regulations, the open cycle crankcase ventilation system is adopted, and the lost engine oil enters an atmospheric system, so that the performance of the engine is influenced, and the atmospheric environmental pollution is caused; and the adoption of a closed-cycle crankcase ventilation system, the lost engine oil enters an air inlet system of the engine, and the risk of overproof engine emission also exists.

In order to improve the oil-gas separation efficiency, the oil-gas separator in the related technology has a complex structure, which results in high production cost, or the internal circulation channel is complex, which causes the pressure loss of gas passing through the oil-gas separator to be too large, which results in the pressure rise of the engine crankcase, and further causes the oil leakage of the engine sealing system, which affects the performance and reliability of the engine.

Disclosure of Invention

The embodiment of the application provides a crankcase ventilation's oil and gas separator, its simple structure, compactness, and can promote the separation efficiency of mixed oil gas.

The embodiment of the application provides a crankcase ventilation's oil and gas separator, oil and gas separator includes:

the shell comprises a separation cavity, an air inlet, an air outlet and an oil return port;

the separation plates are distributed in the separation cavity at intervals along the vertical direction and are connected with the inner wall of the shell; the division board is the tapered structure, and its top is close to the gas outlet sets up, first notch and second notch have been seted up at the bottom edge of division board, the open area of first notch is greater than the second notch, and adjacent two first notch and the equal distribution of staggering of second notch on the division board.

In the embodiment of the present application, preferably, the second notch is located lower than the first notch on the partition plate.

Preferably, the separation plate is disposed obliquely, and the second notch is located at the lowest position of the separation plate.

Preferably, the separation plate is a conical plate.

Preferably, the first notch or the second notch is along a scalloped groove of the bottom edge of the divider plate.

Preferably, the first notch has a corresponding central angle on the separation plate of not more than 90 °, and the second notch has a corresponding central angle on the separation plate of not more than 30 °.

Preferably, the distance between two adjacent partition plates is gradually reduced from the air inlet to the air outlet.

Preferably, in two adjacent separating plates, the top of one separating plate is positioned in the inner cavity of the other separating plate.

Preferably, a cooling chamber is provided in the housing.

Preferably, the shell is further provided with an oil return storage cavity, the oil return storage cavity is annularly arranged at the bottom of the separation cavity, and the bottom of the oil return storage cavity is provided with the oil return port.

The beneficial effect that technical scheme that this application provided brought includes:

(1) the embodiment of the application provides a crankcase ventilation oil-gas separator, wherein a plurality of layers of conical separation plates are arranged in a closed shell, the bottom edge of each separation plate is provided with two different notches, and the notches on two adjacent separation plates are distributed in a staggered manner; the mixed oil gas continuously rises and falls in the separation cavity to be separated step by step in the continuously rising process, and oil drops sink along the inclined plate wall of the separation plate under the action of gravity after being condensed until the oil drops sink step by step and flow back to the oil return port; gas rises step by step in the inner wall of separator plate and casing, and the oil gas that realizes after the separation is discharged through different exports to the gas outlet. The simple structure of this application embodiment is compact, can effectively promote the separation efficiency of mixed oil gas.

(2) In this embodiment, set up the cooling chamber on the casing, this cooling chamber is arranged in being full of the coolant liquid, gets into under the cooling of coolant liquid in the separation chamber from the air inlet when mixing oil gas, increases the radiating effect of the division board of conical, can further improve oil-gas separation efficiency.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a perspective view of a crankcase ventilation oil separator according to an embodiment of the present application;

FIG. 2 is a front view of a crankcase ventilation oil separator according to an embodiment of the present application;

FIG. 3 is a view from the direction A-A in FIG. 2;

FIG. 4 is a front view of a divider plate provided in an embodiment of the present application;

FIG. 5 is a top view of a divider plate provided in embodiments of the present application;

FIG. 6 is a view from the direction B-B in FIG. 5;

FIG. 7 is another view of A-A of FIG. 2;

in the figure: 1. a housing; 10. a separation chamber; 11. an air inlet; 12. an air outlet; 13. an oil return port; 14. an oil return storage chamber; 15. a liquid level meter; 16. a cooling chamber; 17. a cooling hole; 2. a partition plate; 21. a first notch; 22. a second notch.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 to 3, an embodiment of the present application provides a crankcase ventilation oil-gas separator, including:

the shell 1 comprises a separation cavity 10, an air inlet 11, an air outlet 12 and an oil return port 13;

a plurality of partition plates 2 which are distributed at intervals in the vertical direction in the separation chamber 10 and are connected with the inner wall of the shell 1; division board 2 is the tapered structure, and its top is close to gas outlet 12 sets up, first notch 21 and second notch 22 have been seted up at the bottom edge of division board 2, the open area of first notch 21 is greater than second notch 22, and adjacent two first notch 21 and the equal distribution of staggering of second notch 22 on the division board 2.

The embodiment of the application provides a crankcase ventilation's oil and gas separator, its theory of operation is:

the method comprises the steps that continuously mixed oil gas enters a separation cavity 10 from an air inlet 11 on a shell 1, the mixed oil gas moves upwards in the separation cavity 10, and when the mixed oil gas moves upwards and meets a partition plate 2 with the top close to an air outlet 12 on the shell 1, the mixed oil gas is blocked by the partition plate 2 and moves towards a first notch 21 and a second notch 22 on the partition plate 2 along the inclined side wall of the partition plate 2, so that in the process that the mixed oil gas moves towards the air outlet 12 from the air inlet 11, the mixed oil gas continuously climbs the partition plate 2 and is blocked by the partition plate 2 to move downwards to the first notch 21 or the second notch 22, and meanwhile, the notches on two adjacent partition plates 2 are distributed in a staggered mode, specifically, the first notch 21 in one partition plate 2 is staggered with the first notch 21 and the second notch 22 in the adjacent partition plate 2, and the second notch 22 in one partition plate 2 is staggered with the first notch 21 in the adjacent partition plate 2, The second notches 22 are staggered, so that the mixed oil gas is prevented from directly overflowing from the vertically opposite notches, the time of the mixed oil gas in the separation cavity 10 is prolonged, micro oil drops with different particle sizes continuously collide with the partition plate 2 and are condensed into large oil drops, the oil drops fall back to the oil return port 13 step by step along the side wall of the inclined partition plate 2 downwards mainly from the smaller notches, and the gas mainly flows through the larger notches and moves upwards to the gas outlet 12 step by step.

Meanwhile, the conical partition plate 2 is provided with an inclined side wall, and compared with a planar partition plate, the flow direction of mixed oil gas can be guided, and the separation efficiency of the mixed oil gas is improved.

Moreover, the number of the partition plates 2 is set according to the oil content of different engines so as to meet the requirements of different separation efficiencies.

As shown in fig. 4, further, the second notch 22 is positioned lower than the first notch 21 on the partition plate 2. The first notch 21 and the second notch 22 have a height difference, which is more beneficial to the sinking of oil from the second notch 22 with smaller opening.

Preferably, the partition plate 2 is disposed obliquely, and the second notch 22 is located at the lowest position of the partition plate 2. In this embodiment, the bottom edge of the partition plate 2 forms a downward inclined ramp with the inner wall of the housing 1, and the second notch 22 at the bottom of the ramp can smoothly receive oil falling on the side wall of the partition plate 2.

In practical applications, the cross section of the partition plate 2 may be any one of circular, elliptical, rectangular and triangular. Preferably, the partition plate 2 is a conical plate. In the simulation experiment, the separation efficiency of the partition plate 2 in the conical arrangement is the highest.

As shown in fig. 5 to 6, preferably, the first notch 21 or the second notch 22 is a fan-shaped groove along the bottom edge of the partition plate 2. The size of the opening of the fan-shaped groove can be conveniently compared according to the angle corresponding to the notch, and the fan-shaped groove is easy to manufacture and process.

Preferably, the first notch 21 has a corresponding central angle on the separation plate 2 of not more than 90 °, and the second notch 22 has a corresponding central angle on the separation plate 2 of not more than 30 °. When the maximum central angles of the first notch 21 and the second notch do not exceed 90 ° and 30 °, respectively, the partition plates 2 distributed up and down are more easily arranged so that the respective notches are staggered from each other. In the present embodiment, the first notch 21 corresponds to a central angle of 90 °, and the second notch 22 corresponds to a central angle of 20 °.

When the central angle that first notch 21 corresponds does when the triple of second notch 22 is more than, first notch 21 upwards gives vent to anger the effect of second notch 22 oil return downwards is more obvious, can effectively promote oil and gas separator's separation efficiency.

Further, the first notch 21 and the second notch 22 are distributed opposite to each other on the bottom edge of the partition plate 2.

Preferably, the distance between two adjacent partition plates 2 is gradually reduced from the air inlet 11 to the air outlet 12. The separation distance of two adjacent division boards 2 is less, and it more can improve the separation efficiency of mixture oil gas, but, if every two adjacent division boards 2 all set up very little distance, when a plurality of narrow and thin passageway of bending appear, also appear the pressure of air inlet 11 department and the pressure formation great pressure differential of gas outlet 12 department easily, lead to the gas circulation not smooth, reduce the separation efficiency of mixture oil gas, increase engine crankcase pressure simultaneously, be unfavorable for engine crankcase oil gas discharge. It can be seen that according to actual conditions, the interval distance of two adjacent division boards 2 is followed air inlet 11 to gas outlet 12 diminishes gradually and sets up, can effectively separate the mixture oil gas under the unobstructed prerequisite of air current.

More specifically, in two adjacent partition plates 2, the top of one partition plate 2 is located in the inner cavity of the other partition plate 2. When the top of division board 2 of downside was in the inner chamber of the division board 2 of upside, formed the airflow channel of a bending between two division boards 2 for mixed oil gas climbs and descends, can improve the separation efficiency of mixed oil gas.

Preferably, an oil return storage cavity 14 is further arranged in the housing 1, the oil return storage cavity 14 is annularly arranged at the bottom of the separation cavity 10, and the bottom of the oil return storage cavity is provided with the oil return port 13. The return oil storage chamber 14 collects all of the returned oil. In addition, an oil drain plug for plugging the oil return port 13 is arranged at the oil return port 13, so that oil drain operation can be performed when the oil collected in the oil-gas separator of the embodiment reaches the limit.

Further, a liquid level meter 15 is arranged on the shell 1, and the liquid level meter 15 is used for displaying the oil height in the oil return storage cavity 14. In this embodiment, set up the level gauge in order showing the interior fluid volume of collecting of oil and gas separator, when fluid volume exceeded the limit fluid volume, in time carried out fluid and discharged, avoided fluid to block the air inlet.

Specifically, the air inlet 11 is disposed at the bottom of the housing 1, and the air outlet 12 is disposed at the top of the housing 1. The level gauge 15 is the transparent liquid level observation pipe, is marked with the liquid level scale mark of draining on the observation pipe, when oil reached the liquid level scale mark of draining in oil separator's oil return storage chamber 14 collection, the operation of draining was carried out to the oil drain plug screw on the accessible oil return port 13, avoided oil in the oil return storage chamber 14 to stay to also setting up air inlet 11 in the bottom, leads to air inlet 11 to block up.

As shown in fig. 7, a cooling chamber 16 is preferably provided in the housing 1. And a cooling hole 17 for communicating the cooling cavity 16 with the outside of the housing 1 is formed in the housing 1. In this embodiment, the cooling chamber 16 is annularly arranged outside the separation chamber 10, and the cooling liquid is stored in the cooling chamber 16, when the mixed oil gas is in the separation chamber 10, under the cooling effect of the cooling liquid in the cooling chamber 16, the small oil liquid is condensed to form larger oil drops, the heat dissipation effect of the partition plate 2 is increased, and the oil-gas separator of this embodiment is further promoted to improve the separation efficiency. Meanwhile, due to the arrangement of the cooling holes 17, timely replacement of cooling liquid is facilitated.

According to the oil-gas separator ventilated by the crankcase, after mixed oil gas enters the oil-gas separator, the mixed oil gas continuously climbs and descends in the separation cavity to be separated step by step in the process of continuous ascending, and oil drops sink along the inclined plate wall of the separation plate under the action of gravity after being condensed until the oil drops sink step by step and flow back to the oil return opening; gas rises step by step in the inner wall of separator plate and casing, and the oil gas that realizes after the separation is discharged through different exports to the gas outlet. It can be seen that the mixed oil gas is cooled, and the oil gas separation is realized in the separation cavity 10 through the plurality of partition plates 2, so that the oil return and the gas outlet are realized in the shell 1, and the oil-gas separator has the advantages of simple and compact structure and reliable work. Through practical experiment tests, the oil-gas separation efficiency of the engine crankcase can reach 96% at most.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.