CN219711621U - Diesel engine oil-gas separator for non-road - Google Patents

Abstract

The utility model discloses an oil-gas separator of a diesel engine for a non-road, which structurally comprises an upper cover, an oil-gas mixing inlet, a baffle, a fixing screw, a shell, a filtering air outlet, an oil return port, a high-position air outlet, an umbrella-shaped valve and a valve cover.

Description

Diesel engine oil-gas separator for non-road

Technical Field

The utility model relates to the field of forced crankcase ventilation systems of diesel engines, in particular to an oil-gas separator of a diesel engine for non-roads.

Background

With the increasing strictness of the national emission regulations of the road diesel engine, the road diesel engine has implemented the national six-stage emission standard, and with the rapid development of the application of various non-road mobile machines in markets and life along with the urban construction and agricultural development, the requirement of pollutant emission control on the non-road mobile machines is also more and more urgent.

When the engine works, a part of combustible mixed gas and waste gas always flow into the crankcase through the piston ring, and gasoline vapor flowing into the crankcase is condensed to dilute the engine oil, so that the performance is poor. The exhaust gas contains water vapor and carbon dioxide, and the water vapor condenses in the engine oil to form foam, which damages the engine oil supply. The sulfur dioxide generates sulfurous acid when meeting water, the sulfurous acid generates sulfuric acid when meeting oxygen in the air, and the acidic substances not only deteriorate engine oil, but also corrode parts. Because the combustible mixture and the exhaust gas are blown into the crankcase, the pressure in the crankcase will become large, and the engine oil will leak out from the crankshaft oil seal and the like and run off. The pressure in the crankcase becomes larger, so that the resistance is increased when the piston moves, the power loss of the engine is caused, and the engine is provided with the crankshaft ventilation device, so that the phenomenon can be avoided or lightened, and the crankshaft ventilation device has the following functions: 1. preventing the engine oil from deteriorating; 2. Preventing leakage of a crankshaft oil seal and a crankshaft box gasket; 3. reducing engine power losses.

The oil-gas separator is used for separating engine oil from gas when the crankcase is ventilated. Because of the strict requirements of the emission regulations of road vehicles, the design of oil-gas separation devices by road vehicle diesel engines is common. However, in the case of an off-road diesel engine, since it is only necessary to meet the emission requirements of state four, for example, the use of an oil-gas separator for a road vehicle diesel engine, the use of a relatively complex structure (including a bypass valve, a pressure regulating valve, and other components, and the need of connection with a supercharger, etc.) tends to result in an increase in the use cost. Therefore, the development of an oil-gas separation device suitable for a national four-way off-road diesel engine is required.

Disclosure of Invention

In order to overcome the defects of the prior art, a non-road diesel engine oil-gas separator is provided to solve the problem that the requirements of the emission regulations of road vehicles are strict, so that the condition of designing an oil-gas separation device by a road vehicle diesel engine is common, but for the non-road diesel engine, the requirements of national fourth emission are only required to be met, for example, the oil-gas separator of the road vehicle diesel engine is used, and the problem of increasing the cost is caused due to the fact that the structure of the non-road diesel engine is complex (the oil-gas separator comprises a bypass valve, a pressure regulating valve and other components and needs to be connected with a supercharger).

The utility model is realized by the following technical scheme: the utility model provides a diesel engine oil-gas separator for non-road, comprising

The upper end opening of the shell is connected with an upper cover through a fixing screw, an integrally formed baffle is arranged at the joint of the upper cover and the shell, the baffle is obliquely arranged and is arranged at the bottom end in an arc shape, and protruding platforms are arranged at two sides of the baffle;

the bottom end of the shell is respectively provided with an oil return port and a filtering air outlet, the top end of the rear end face of the shell is provided with a high-position air outlet, and the high-position air outlet is positioned at the rear end of the baffle;

the upper cover top is equipped with the oil gas mixing air inlet that runs through, and oil gas mixing air inlet is located the baffle middle part.

Furthermore, an umbrella-shaped valve is fixed inside the oil return port through a valve cover.

Further, the two sides of the bottom end surface inside the upper cover are provided with inward fixing columns.

Further, the top end of the filtering air outlet is positioned at the lower end of the baffle plate.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the oil-gas mixing air inlet is connected with the crankcase, the filtering air outlet is communicated with the atmosphere, the oil return port is connected with the oil pan, the crankcase blowby gas entering from the oil-gas mixing air inlet enters the separator and then hits the baffle plate, engine oil in the blowby gas hit on the baffle plate is gathered and then drips downwards along with the baffle plate along with gravity, the drifted engine oil is gathered at the bottom of the shell, namely the umbrella-shaped valve, the umbrella-shaped valve is opened due to the gravity of the engine oil, and the engine oil returns to the oil pan along the through hole of the valve cover to continue lubrication, so that the oil-gas separator is simple in integral structure, is suitable for the oil-gas separator used by non-road national four diesel engines, does not need bypass valves, pressure regulating valves and other components, meets national four-emission standards, and is low in cost.

According to the utility model, the umbrella-shaped valve is adopted, so that separated engine oil is conveniently collected, and the engine oil is prevented from reversely flowing into the oil-gas separator (under the condition of high pressure of the oil pan).

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of an explosive structure according to the present utility model;

FIG. 3 is a schematic view of the internal structure of the present utility model;

FIG. 4 is a schematic view of the umbrella valve of the present utility model;

in the figure: the device comprises an upper cover-1, an oil-gas mixing air inlet-11, a baffle-2, a fixing screw-3, a shell-4, an oil return port-41, a filtering air outlet-42, a high-position air outlet-43, an umbrella-shaped valve-5 and a valve cover-6.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1-4, the utility model provides a diesel engine oil-gas separator for non-road, comprising an upper cover 1 connected with an opening at the upper end of a casing 4 through a fixing screw 3, wherein the casing 4 can be provided with a rectangular shape, a baffle plate 2 integrally formed is arranged at the joint of the upper cover 1 and the casing 4, the baffle plate 2 prevents liquid from entering a filtering air outlet 42 or a high-position air outlet 43 to play a role in preventing, the two sides of the bottom end surface inside the upper cover 1 are provided with inward fixing columns, so that the fixing screw 3 can be stressed and fixed, the baffle plate 2 is obliquely arranged to facilitate the downward outflow of oil, and is arranged at the bottom end in an arc shape, so that the prevention of the filtering air outlet 42 or the high-position air outlet 43 is increased, and the two sides of the baffle plate 2 are provided with convex platforms to increase the fixing effect, make set screw 3 more convenient when fixed, the casing 4 bottom is equipped with oil return port 41 respectively and filters gas outlet 42 and make things convenient for oil and exhaust, and filter gas outlet 42 top and be in baffle 2 lower extreme, avoid fluid to get into inside the filtration gas outlet 42, oil return port 41 is inside to be fixed with umbrella valve 5 through valve gap 6, through umbrella valve design, make the engine oil that conveniently collect the separation out, prevent that engine oil from reverse inflow oil and gas separator, casing 4 rear end face top is equipped with high-order gas outlet 43 and conveniently discharges the gas channeling, and high-order gas outlet 43 is located baffle 2 rear end, prevented the entering of liquid, upper cover 1 top is equipped with the oil gas mixture air inlet 11 that runs through and conveniently gets into oil and gas, and oil gas mixture air inlet 11 is located baffle 2 middle part, make things convenient for baffle 2 to transmit.

Working principle: when the oil-gas mixing device is used, the oil-gas mixing air inlet 11 at the upper end of the upper cover 1 is connected with a crankcase, the filtering air outlet 42 at the lower end of the shell 4 is communicated with the atmosphere, the oil return port 41 is connected with the oil pan, crankcase blowby gas entering from the oil-gas mixing air inlet 11 enters the shell 4 and then hits the baffle 2, engine oil in blowby gas hit on the baffle 2 is gathered and then drips downwards along with the baffle 2 along with gravity, the leached engine oil is gathered at the bottom of the shell 4, namely, the umbrella valve 5 is opened by the gravity of the engine oil, the engine oil returns to the oil pan along the through hole of the valve cover 6 to continue lubrication, after the blowby gas hits the baffle 2, bypasses the baffle 2, part of large-particle engine oil can be filtered out through the centrifugal force generated when the baffle 2 is located at a lower position in the upper end of the shell 4 and flows around, wherein the umbrella valve 5 is assembled at the oil return passage of the shell 4, the umbrella valve 5 is opened downwards by the pressure when the engine oil is piled up or the separator is located at a positive pressure, the filtered engine oil flows to the oil pan through the oil return port 41, and the umbrella valve is sealed reversely when the inside the separator is located at a negative pressure or positive pressure and the oil pan.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (4)

1. The utility model provides a diesel engine oil and gas separator for non-road which characterized in that includes

The device comprises a shell (4), wherein an upper cover (1) is connected to an opening at the upper end of the shell (4) through a fixing screw (3), an integrally formed baffle (2) is arranged at the joint of the upper cover (1) and the shell (4), the baffle (2) is obliquely arranged, the bottom end of the baffle is arc-shaped, and convex platforms are arranged on two sides of the baffle (2);

an oil return port (41) and a filtering air outlet (42) are respectively arranged at the bottom end of the shell (4), a high-position air outlet (43) is arranged at the top end of the rear end surface of the shell (4), and the high-position air outlet (43) is positioned at the rear end of the baffle (2);

the top of the upper cover (1) is provided with a penetrating oil-gas mixing air inlet (11), and the oil-gas mixing air inlet (11) is positioned in the middle of the baffle plate (2).

2. The non-road diesel oil-gas separator according to claim 1, wherein: an umbrella-shaped valve (5) is fixed in the oil return port (41) through a valve cover (6).

3. The non-road diesel oil-gas separator according to claim 1, wherein: the two sides of the bottom end surface inside the upper cover (1) are provided with inward fixing columns.

4. The non-road diesel oil-gas separator according to claim 1, wherein: the top end of the filtering air outlet (42) is positioned at the lower end of the baffle plate (2).