CN206681815U - A kind of gas and oil separating plant for engine PCV system - Google Patents

Abstract

The utility model discloses an oil-gas separation device for the forced ventilation system of the crankcase of the engine, which is used to connect the crankcase, the intake manifold and the oil-gas separation device. The air inlet is connected to the oil return port, and the intake manifold is connected to the air outlet of the oil-gas separation device; the oil-gas separation device includes a shell, and a vertical partition is arranged in the center of the shell, and the vertical partition divides the inside of the shell into an outer cavity and a Inner chamber, and the upper part of the vertical partition is provided with several air holes through the inner chamber and the outer chamber, the air inlet and the oil return port are respectively arranged on the lower side and the bottom of the outer chamber, the air outlet is arranged on the top of the inner chamber, and the inner chamber is arranged There is a filter element; an upper transverse partition and a lower transverse partition are arranged inside the outer cavity, and an upper curved guide plate bent downward is arranged at the front end of the upper transverse partition. The device can completely filter and separate oil and gas, and can quickly replace the filter element.

Description

A kind of oil and gas separation device used in engine crankcase forced ventilation system

technical field

The utility model relates to an engine crankcase forced ventilation system, in particular to an oil-gas separation device used in the engine crankcase forced ventilation system.

Background technique

When the engine is working, the high-pressure combustible mixture and burned gas in the combustion chamber will more or less leak into the crankcase through the gap between the piston group and the cylinder, causing blow-by. The components of blow-by gas are unburned fuel gas, water vapor and exhaust gas, etc., which will dilute the engine oil, reduce the performance of the engine oil, and accelerate the oxidation and deterioration of the engine oil. Moisture condenses in the engine oil, which will form sludge and block the oil circuit; the acid gas in the exhaust gas will be mixed into the lubrication system, which will cause corrosion and accelerated wear of engine parts; blow-by gas will also cause the pressure of the crankcase to be too high and damage the crankcase. Sealed so oil leaks can be searched for. In order to prevent excessive crankcase pressure, prolong the service life of engine oil, reduce wear and corrosion of parts, and prevent engine oil leakage, crankcase ventilation must be implemented.

CN201738984U discloses a kind of oil-gas separation device of engine, and this oil-gas separation device comprises housing, air inlet, gas outlet, oil return port, and wherein this oil-gas separation device also comprises baffle, and this baffle divides the inside of described housing Separated into an upper chamber and a lower chamber, the air inlet communicates with the upper part of the lower chamber, the air outlet communicates with the upper part of the upper chamber, the oil return port is located at the bottom of the lower chamber, the The lower side of the casing has a first pipe through which the upper chamber and the lower chamber communicate, and the upper chamber has a filter core. The separation device mainly separates and filters the oil and gas through the filter element, which can completely filter and separate the oil and gas, and can quickly replace the filter element.

Contents of the invention

The purpose of this utility model is to overcome the above-mentioned deficiencies of the prior art and provide an oil-gas separation device for the forced ventilation system of the crankcase of the engine. The filter element in the separation device requires low filtration capacity, and the filter element can be replaced quickly.

In order to achieve the above object, the technical solution of the present invention is: a kind of oil-air separation device for the engine crankcase forced ventilation system, comprising: crankcase, intake manifold and oil-gas separation device, the air vent of the crankcase and The oil pan is respectively connected with the air inlet and the oil return port of the oil-gas separation device, and the intake manifold is connected with the gas outlet of the oil-gas separation device; it is characterized in that: the oil-gas separation device includes a housing, and the housing A cylindrical vertical partition is arranged in the center of the interior, and the vertical partition divides the interior of the shell into an outer cavity and an inner cavity, and several air holes passing through the inner cavity and the outer cavity are arranged on the upper part of the vertical partition, and the air intake The outlet and the oil return port are respectively arranged on the lower side and the bottom of the outer chamber, the air outlet is arranged on the top of the inner chamber, and a filter element is arranged inside the inner chamber; The connected upper and lower transverse partitions, the front end of the upper transverse partition is provided with a downwardly curved upper arc-shaped guide plate, the front end of the lower transverse partition is provided with an upwardly curved lower arc-shaped guide plate, the upper The arc guide plate is positioned at the inner side of the lower arc guide plate.

Further, the air inlet of the oil-gas separation device is provided with an air inlet pipe in an inclined manner,

Specifically, after the oil gas enters the outer cavity from the air inlet, it will rise along the wall of the outer cavity, and the oil droplets will hit the arc-shaped guide plate, rebound downwards and flow into the oil return port.

Further, several oil return holes are opened on the vertical partition, and the oil return holes are located at the upper part of the connection between the vertical partition and the lower transverse partition.

Further, the bottom of the upper curved guide plate is lower than the top of the lower curved guide plate.

Further, the joints between both sides of the upper transverse partition and the inner wall of the casing are inwardly concave arc-shaped structures.

Further, a filter joint is connected to the oil return port, an annular boss is provided on the lower side of the filter joint, and a permanent magnetic filter is provided inside the filter joint.

Further, a detachable air outlet cap is arranged above the inner cavity, the air outlet is arranged on the air outlet cap, and the bottom of the air outlet cap is in contact with the filter element.

The beneficial effects of the utility model:

1. In this utility model, an oil-gas separation device is installed between the crankcase and the intake manifold, so that the exhaust gas sucked into the intake manifold will become clean, greatly reducing the generation of engine oil sludge and carbon deposits;

2. In the utility model, by setting a curved labyrinth-shaped air passage in the oil-gas separation device, the oil droplets in the oil and gas can be separated, thereby improving the oil-gas separation rate and reducing the use and consumption of the filter element.

Description of drawings

Fig. 1 - the structure schematic diagram of a kind of oil-gas separation device that is used for engine crankcase forced ventilation system of the present utility model.

In the figure: 1—air outlet, 2—air hole, 3—upper diaphragm, 4—upper arc guide plate, 5—lower arc guide plate, 6—lower diaphragm, 7—shell, 8—oil return port , 9—filter joint, 10—vertical partition, 11—intake pipe, 12—intake port, 13—oil return hole, 14—shrinking speed increase area, 15—expansion deceleration area, 16—filter element, 17—air outlet Cap; 91—annular boss, 92—permanent magnetic filter screen.

detailed description

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in the accompanying drawings: a forced ventilation system for engine crankcase with an oil-air separation device, including: a crankcase, an intake manifold and an oil-air separation device. The air inlet 12 is connected to the oil return port 8, and the air intake manifold is connected to the air outlet 1 of the oil-gas separation device; it is characterized in that: the oil-gas separation device includes a housing 7, and the center of the housing 7 is set There is a cylindrical vertical partition 10, which divides the interior of the housing 7 into an outer cavity and an inner cavity, and the upper part of the vertical partition 10 is provided with several air holes 2 passing through the inner cavity and the outer cavity, so The air inlet 12 and the oil return port 8 are respectively arranged on the lower side and the bottom of the outer cavity, the air outlet 1 is arranged on the top of the inner cavity, and a filter element 16 is arranged inside the inner cavity; The upper horizontal partition 3 and the lower horizontal partition 6 connected with the housing 7 and the vertical partition 10, the front end of the upper horizontal partition 3 is provided with an upper curved guide plate 4 bent downward, and the lower horizontal partition 6 The front end is provided with an upwardly curved lower arc guide plate 5 , the upper arc guide plate 4 is located inside the lower arc guide plate 5 , and the bottom of the upper arc guide plate 4 is lower than the top of the lower arc guide plate 5 .

The air inlet 12 of the oil-gas separation device is provided with an air inlet pipe 11 in an inclined manner. The included angle between the axis of the air inlet pipe 11 and the normal line of the casing is 60°.

Specifically, after the oil gas enters the outer cavity from the air inlet 12, it will spiral upward along the wall surface of the outer cavity, and the oil droplets will rebound after hitting the arc-shaped guide plate and flow into the oil return port 8.

Several oil return holes 13 are also opened on the vertical partition 10 , and the oil return holes 13 are located at the upper part of the joint between the vertical partition 10 and the lower transverse partition 6 . After the oil and gas pass through the labyrinth air passage formed by the lower diaphragm 6 and the upper diaphragm 3, a large number of oil droplets will fall on the walls of the lower diaphragm 6 and the lower diaphragm 6, and flow into the inner cavity from the oil return hole 13 and then Drop into oil return port 8.

The junctions between both sides of the upper transverse partition 3 and the inner wall of the housing 7 are inwardly concave arc-shaped structures. The concave arc structure on the lower side of the upper diaphragm 3 and the outer side of the lower diaphragm 6 form a constriction speed-up area 14, which can improve the entry of oil and gas into the labyrinth air passage formed by the lower diaphragm 6 and the upper diaphragm 3 speed, thereby increasing the attraction of oil and gas; the upper side of the upper horizontal partition 3 and the outer side of the vertical partition 10 will form an expansion deceleration zone, and the oil and gas will obviously decelerate in this area. After the decelerated oil and gas enter the filter element 16, It is possible to make the filter element 16 more thoroughly filter and separate the remaining oil in the oil and gas.

The oil return port 8 is connected with a filter joint 9 , the upper side and the lower side of the filter joint 9 are respectively provided with external threads and annular bosses 91 , and the inside of the filter joint 9 is provided with a permanent magnetic filter screen 92 . The permanent magnetic filter screen 92 can absorb the metal powder in the return oil, thereby ensuring the cleanliness of the oil flowing back into the oil pan.

An air outlet cap 17 is installed above the inner cavity in a threaded manner, the air outlet 1 is arranged on the air outlet cap 17 , and the bottom of the air outlet cap 17 is in contact with the filter element 16 . The air outlet cap 17 can fix the filter element 16 in the inner cavity, so as to ensure that the filter element 16 will not move during the running of the car, and after the air outlet cap 17 is unscrewed, the filter element 16 can be replaced.

The working principle of the oil-gas separation device in the utility model:

After the oil and gas enter the casing 7 from the air inlet 12, the oil and gas will spiral upward along the wall of the outer cavity, and the oil droplets will rebound after hitting the arc-shaped guide plate and flow into the oil return port 8; After the labyrinth airway formed by the diaphragm 6 and the upper diaphragm 3, it will collide with the upper arc-shaped guide plate 4 at the front end of the upper diaphragm 3, and under the guidance of the upper arc-shaped guide plate 4, it will collide with the lower arc-shaped guide plate 5 When the inner side of the baffle is hit, the oil and gas will generate strong centrifugal force twice in a row in the labyrinth air passage, and most of the oil droplets will be thrown to the walls of the lower diaphragm 6 and the upper diaphragm 3, and then flow from the oil return hole 13. Back; after the oil gas flows out of the labyrinth airway, after being decelerated by the expansion deceleration zone, it enters the filter element 16, and the oil droplets filtered by the filter element 16 will flow into the oil return port 8 from the outlet below the inner cavity.

The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present utility model. Equivalent changes or modifications made by the spirit of the present utility model shall be covered within the protection scope of the present utility model.

Claims (7)

1. A kind of oil-gas separation device for engine crankcase forced ventilation system, comprising: crankcase, intake manifold and oil-gas separation device, the air vent of described crankcase and the oil sump are connected with the intake air of oil-gas separation device respectively The inlet is connected to the oil return port, and the intake manifold is connected to the gas outlet of the oil-gas separation device; it is characterized in that: the oil-gas separation device includes a shell, and a cylindrical vertical partition is arranged in the center of the shell, The vertical partition divides the interior of the shell into an outer chamber and an inner chamber, and several air holes passing through the inner chamber and the outer chamber are arranged on the upper part of the vertical partition, and the air inlet and the oil return port are respectively arranged under the outer chamber. side and bottom, the air outlet is set on the top of the inner cavity, and the inner cavity is provided with a filter element; the outer cavity is equipped with an upper horizontal partition and a lower horizontal partition respectively connected with the shell and the vertical partition , the front end of the upper transverse partition is provided with a downwardly curved upper arc guide plate, the front end of the lower transverse partition is provided with an upwardly curved lower arc guide plate, and the upper arc guide plate is located inside the lower arc guide plate. 2. The oil-air separation device used in the engine crankcase forced ventilation system according to claim 1, characterized in that: the air inlet of the oil-air separation device is provided with an air intake pipe in an inclined manner. 3. The oil-gas separation device for forced ventilation system of engine crankcase as claimed in claim 1, characterized in that: several oil return holes are also provided on the vertical partition, and the oil return holes are located between the vertical partition and the lower The upper part of the diaphragm junction. 4 . The oil-air separation device used in the engine crankcase forced ventilation system according to claim 1 , wherein the bottom of the upper arc-shaped guide plate is lower than the top of the lower arc-shaped guide plate. 5 . The oil-gas separation device used in the engine crankcase forced ventilation system according to claim 1 , wherein the joints between both sides of the upper diaphragm and the inner wall of the housing are inwardly concave arc structures. 6 . 6. The oil-gas separation device used in the engine crankcase forced ventilation system according to claim 1, characterized in that: the oil return port is connected with a filter joint, and the lower side of the filter joint is provided with an annular boss, and the filter A permanent magnetic filter is arranged inside the joint. 7. The oil-gas separation device for the engine crankcase forced ventilation system as claimed in claim 1, characterized in that: a detachable air outlet cap is arranged above the inner cavity, and the air outlet is arranged on the air outlet cap. The bottom of the outlet cap is in contact with the filter element.