Oil-gas pre-separation device arranged on gear chamber of diesel engine for vehicle

Abstract

The utility model relates to an oil-gas pre-separation device of a diesel engine, in particular to an oil-gas pre-separation device arranged on a gear chamber of an automotive diesel engine, which is characterized in that a cooling cavity (10) of the oil-gas pre-separation device is directly cast on the gear chamber (6); the baffle plate assembly (1) covers a sealing tape (9) coated with sealant on the edge of the cooling cavity (10) and is tightened by a fastening bolt (5); an inclined isolation rib plate (8) is arranged in the cooling cavity (10); the baffle assembly (1) is provided with an oil gas inlet (2) and an L-shaped reinforcing rib (4); an air outlet (7) is formed in the right upper part of the cooling cavity (10); two U-shaped bent pipes (3) are welded at the lower end of the baffle assembly (1); and the cooling cavity (10), the baffle assembly (1) and the inclined isolation rib plate (8) jointly form a zigzag labyrinth channel. Oil and gas can only flow towards an outlet along the labyrinth channel, and pre-separation of the oil and gas and waste gas is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of oil-gas pre-separation devices for vehicle diesel engine, in particular to a kind of oil-gas pre-separation devices arranged on the gear chamber of vehicle diesel engine. BACKGROUND

[0002] At present, the importance of environmental protection is increasing, and the standards for motor vehicle exhaust emissions are becoming more and more stringent. In order to meet the standards for automobile exhaust emissions, the combustion explosion pressure in the cylinder of vehicle diesel engine is continuously increasing. When the diesel engine is working, the high-pressure gas formed by the combustion of the mixture pushes the piston in the cylinder to move. During this process, the gap between the piston and the piston ring will cause a part of the high-pressure gas to flow into the spaces such as crankcase, gear chamber, oil pan, rocker chamber cover, etc. that are connected, resulting in an increase in gas pressure in these spaces. These high-temperature and high-pressure exhaust gases will cause sealing damage, oil deterioration, and pollution problems.

[0003] To solve the problem of exhaust gas in the crankcase, the diesel engine is equipped with a breather to reduce the pressure in the crankcase. The breather has strict requirements on the oil mist content, oil droplet size and density in the exhaust gas in the crankcase. When the oil droplet content of the oil vapor is greater than the separation capacity of the breather, a part of the oil mist cannot be separated and will be discharged to the atmosphere through the breather outlet. This not only increases the consumption of oil, but also pollutes the atmosphere. In order to meet the oil-gas separation effect, the size and volume of the diesel engine breather are generally large, which has certain requirements on the installation space. SUMMARY

[0004] The utility model aims at providing a kind of oil-gas pre-separation devices arranged on the gear chamber of vehicle diesel engine, the utility model oil-gas pre-separation device is arranged on the gear chamber of diesel engine, cooling cavity is directly integrated cast on gear chamber, prevent baffle deformation gas leakage;Prevent the exhaust gas of crankcase from flowing into condensing cavity through this passage, so that oil-gas can only flow to the outlet direction along the labyrinth passage, realize the pre-separation of oil-gas and exhaust gas.

[0005] The utility model aims at providing a kind of oil-gas pre-separation devices arranged on the gear chamber of vehicle diesel engine, the utility model oil-gas pre-separation device is arranged on the gear chamber of diesel engine, cooling cavity is directly integrated cast on gear chamber, prevent baffle deformation gas leakage;Prevent the exhaust gas of crankcase from flowing into condensing cavity through this passage, so that oil-gas can only flow to the outlet direction along the labyrinth passage, realize the pre-separation of oil-gas and exhaust gas.

[0006] The oil-gas pre-separation device arranged on the gear chamber of the diesel engine comprises a baffle assembly, an oil-gas inlet, a U-shaped bend, a reinforcing rib, a fastening bolt, a gear chamber, a cooling cavity gas outlet, a partition rib plate, a sealing strip and a cooling cavity.

[0007] The partition rib plate is at an angle of 30 degrees with the horizontal direction.

[0008] The oil-gas pre-separation device has the advantages and effects that:

[0009] The oil-gas pre-separation device is arranged on the gear chamber of the diesel engine and comprises a cooling cavity, a baffle assembly, a U-shaped bend, a fastening bolt and the like. The cooling cavity is directly integrated and cast on the gear chamber, so that the structure is compact, the arrangement is convenient and the manufacturing is convenient. An inclined partition rib plate is arranged in the cooling cavity. The baffle assembly covers the sealing strip at the edge of the cooling cavity and the top end of the partition rib plate, the sealing strip is glued and fastened by the bolt, a zigzag labyrinth passage is formed by the baffle, the cooling cavity and the partition rib plate, an L-shaped reinforcing rib structure is arranged on the baffle assembly to prevent the baffle from deforming and leaking, two U-shaped bends are arranged at the lower end of the baffle assembly, the U-shaped oil surface formed in the pipe is sealed to prevent the exhaust gas in the crankcase from flowing into the condensing cavity through the passage. An oil-gas inlet is arranged on the baffle assembly at the front end of the labyrinth passage, a gas outlet is arranged at the upper right of the cooling cavity, the pressure in the diesel engine crankcase and the gear chamber is higher than that outside, and the structure is sealed, so that the oil-gas can only flow to the outlet along the labyrinth passage. In the flowing process, the oil-gas is pre-separated from the exhaust gas by the adsorption of the cooling cavity and the partition rib plate and the gravity of the oil droplets. The baffle is made of a steel plate by stamping, which is mature in technology, easy to process and low in cost. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a structural schematic view of the oil-gas pre-separation device of the utility model;

[0011] Figure 2 is an assembly schematic view of the embodiment of the utility model.

[0012] Components in the drawing: baffle assembly 1, oil-gas inlet 2, U-shaped bend 3, reinforcing rib 4, fastening bolt 5, gear chamber 6, cooling cavity gas outlet 7, partition rib plate 8, sealing strip 9 and cooling cavity 10. DETAILED DESCRIPTION

[0013] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings.

[0014] This utility model relates to an oil-gas pre-separation device installed on the gear chamber of a diesel engine. It comprises a cooling chamber, a baffle assembly, U-shaped bends, and fastening bolts. The cooling chamber is directly integrated and cast onto the gear chamber, and an inclined isolation rib is installed inside the cooling chamber. The baffle assembly covers the sealing strip at the edge of the cooling chamber and the top of the isolation rib; the sealing strip is coated with adhesive and tightened with bolts. The baffle, cooling chamber, and isolation rib together form a zigzag labyrinthine channel. The baffle assembly has an oil-gas inlet and an L-shaped reinforcing rib structure to prevent deformation and leakage. An outlet is located on the upper right side of the cooling chamber. Two U-shaped bends are installed at the lower end of the baffle assembly.

[0015] like Figure 1 As shown in the diagram, the black shading represents the sealing strip, indicating the area of ​​the sealing adhesive. The cooling chamber 10 of the oil-gas pre-separation device is directly cast onto the gear chamber 6. The baffle assembly 1 covers the sealing strip 9 with sealant applied to the edge of the cooling chamber 10 and is tightened with fastening bolts 5. An inclined isolation rib 8 is provided inside the cooling chamber 10. The baffle assembly 1 has an oil-gas inlet 2 and an L-shaped reinforcing rib 4. An air outlet 7 is located on the upper right side of the cooling chamber 10. Two U-shaped bends 3 are welded to the lower end of the baffle assembly 1. The isolation rib 8 forms a 30-degree angle with the horizontal direction. The cooling chamber 10, the baffle assembly 1, and the inclined isolation rib 8 together form a zigzag labyrinthine channel.

[0016] The principle of this invention is as follows: When the diesel engine is working, the gas pressure in the crankcase and gear chamber is higher than that of the outside, and the structure is sealed, so that oil and gas can only enter the cooling chamber through the oil and gas inlet on the baffle, flowing towards the outlet along the formed zigzag labyrinth channel. During this flow, the oil and gas are pre-separated from the exhaust gas by the adsorption of the cooling chamber, baffle, and isolation ribs, as well as the gravity of the oil droplets. The oil droplets condensed in the upper cooling chamber will flow down the inclined isolation ribs into the lower cooling chamber. All the separated oil collects in the lower cooling chamber and flows back to the oil pan by gravity through two U-shaped bends; a U-shaped oil surface is formed in the bends to achieve a seal, preventing oil and gas from reversing into the cooling chamber through this channel, while the exhaust gas after oil and gas separation continues to flow and enters the external breather from the outlet.

[0017] like Figure 2As shown, it is the embodiment assembly schematic diagram of the utility model installed on diesel engine, the baffle assembly covers on the sealing band of the cooling cavity edge and the isolation rib top, the sealing band upper surface is coated with glue and is tightened with bolt, the sealing of the cooling cavity periphery is formed; in this way, the baffle assembly and the cooling cavity and the isolation rib form the zigzag labyrinth channel jointly. The lower end of the baffle assembly is welded with two U-shaped bent pipes, the U-shaped oil level in the pipe can realize the sealing of the cooling cavity, can prevent the exhaust gas of crankcase from flowing into the condensation cavity through the channel. Oil gas flows through the structure, realizes the pre-separation of oil gas and exhaust gas. The separated oil is collected in the lower cooling cavity, and flows back to the oil pan through the lower welded U-shaped bent pipe by gravity. And the exhaust gas after separating oil gas continues to flow, enters the external respirator from the air outlet.

Claims

1. An oil-gas pre-separation device installed on the gear chamber of a vehicle diesel engine, characterized in that, The device comprises a baffle assembly (1), an oil-gas inlet (2), a U-shaped bend pipe (3), a reinforcing rib (4), a fastening bolt (5), a gear chamber (6), a cooling cavity gas outlet (7), an isolation rib plate (8), a sealing strip (9), and a cooling cavity (10); the cooling cavity (10) of the oil-gas pre-separation device is directly cast on the gear chamber (6); the baffle assembly (1) is covered on the sealing strip (9) coated with sealing glue at the edge of the cooling cavity (10) and is fastened with the fastening bolt (5); an inclined isolation rib plate (8) is arranged in the cooling cavity (10); the baffle assembly (1) is provided with the oil-gas inlet (2) and an L-shaped reinforcing rib (4); the right upper portion of the cooling cavity (10) is provided with the gas outlet (7); the lower end of the baffle assembly (1) is welded with two U-shaped bend pipes (3); the cooling cavity (10), the baffle assembly (1) and the inclined isolation rib plate (8) jointly form a zigzag-shaped labyrinth channel.

2. The oil-gas pre-separation device disposed on the gear chamber of a diesel engine for a vehicle according to claim 1, characterized in that, The isolation rib plate (8) forms a 30-degree angle with the horizontal direction.

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