RU169135U1 - OIL SEPARATOR FOR COOLING VENTILATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - Google Patents

Abstract

The inventive oil separator of the ventilation system of the crankcase of an internal combustion engine comprises a housing (1) having an inlet (2) for receiving a gas-oil mixture from the engine and an outlet (3) for discharging separated gases, as well as a drain pipe (4) for oil. A central axial element (5) is mounted inside the housing (1), on which two partitions (7) are fixed through a spacer (6). Partitions (7) are made with through holes uniformly distributed over the surface. Between the partitions (7) is placed oil precipitation grid (8). The problem was solved to improve the operational characteristics of the device by increasing the efficiency of oil separation.

Description

The utility model relates to the field of mechanical engineering, namely, devices for separating gases from liquid from a dispersed two-phase stream, and can be used to separate oil from crankcase gases in the crankcase ventilation system of an internal combustion engine.

Known oil separator, in the housing of which a movable spiral wall is formed, forming a channel for gas flow between the inlet and outlet, a movable part of the diaphragm forming a closed volume that is open towards the intake manifold is connected to the wall (US patent No. 7140358, F02M 25/06, publ. . 11.28.2006).

The principle of operation of the device is based on the fact that as a result of a change in pressure, a corresponding displacement of the wall occurs, which entails a change in the height of the channel. The disadvantage of this device is that with sharp pressure surges, the spiral wall does not have time to form a channel of the desired height, which negatively affects the quality of oil separation.

A known oil separator comprising a housing having an inlet for receiving a gas-oil mixture from the engine and an outlet for discharging separated gases, as well as an oil outlet installed in the housing is a spiral wall that directs gases from the entrance of the housing to its exit, while the spiral path for gases constantly decreases between input and output (US patent No. 7246612, IPC F02M 25/06, publ. 24.07.07).

A disadvantage of the known device is that with an increase in the amount of oil in the crankcase gases at the outlet of the assembly, a significant increase in hydraulic resistance is observed, which leads to a decrease in the efficiency of the oil deposition process.

A device is known for separating liquid from gas, mainly for separating oil from crankcase gases of internal combustion engines, comprising a housing with a coaxial cylinder and a mesh separating element installed therein, nozzles for supplying a gas-liquid mixture, venting gases and draining the separated oil, the housing being provided with a cavity for the circulation of coolant, covering the mesh separating element, which is made in the form of a pipe with transverse corrugations and is tightly placed between the cooled wall of the housing CA and a cylinder (patent RU No. 2052640, IPC6 F01M 11/08, 13/04, publ. 01.20.1996).

A disadvantage of the known device is that it does not provide sufficient separation of the gas-oil mixture, has a complex structure.

Also known is an oil separator of the crankcase ventilation system of an internal combustion engine, selected as a prototype in terms of the set of essential features and the claimed technical result, comprising a housing having an inlet for receiving a gas-oil mixture from the engine and an outlet for discharging separated gases, as well as an oil drain pipe installed in the casing has a spiral wall directing the flow from the inlet to the outlet, while the channel formed by the spiral wall is made to increase in width between the inlet and the outlet , the entrance is located in the lower part tangentially to the inner surface of the cylindrical casing, in addition, the device is equipped with an oil grid placed in the center of the casing, as well as along its inner surface and spiral wall (patent RU No. 111583, IPC F01M 13/04 (2006.01), publ. 12/20/2011).

This device works quite efficiently with crankcase gas flow rates of up to 250 l / min, then the deposition efficiency of the oil in the system deteriorates, because as the flow of crankcase gases increases, the amount of oil in the form of fine droplets also increases, which evaporates with the incident flow of crankcase gases.

The task to which the claimed technical solution is directed is to improve the operational characteristics of the device by increasing the efficiency of oil separation and ensuring the operation of the unit with high performance in a wide range.

To solve the problem, the oil separator of the ventilation system of the crankcase of an internal combustion engine, comprising a housing having an input for receiving a gas-oil mixture from the engine and an outlet for discharging separated gases, as well as a drain pipe for oil, an oil settling grid, further comprises a central axial element on which, through a spacer, fixed two partitions having through holes, while the oil grid is placed between the said partitions. In the particular case of execution, the housing consists of two parts, one of which is made in the form of a cover.

The set of distinctive features, namely, that the device additionally contains a Central axial element, on which two partitions having through holes are fixed through a spacer, while the oil separation grid is placed between the said partitions, allows changing the geometry of the crankcase gas flow in the oil separator, improving coalescence, ensuring operation of the unit with high performance in a wide range.

The applicant is not aware of the oil separators of the crankcase ventilation system of the internal combustion engine with the indicated combination of essential features, and the claimed combination of essential features does not follow explicitly from the state of the art, therefore, the claimed technical solution meets the patentability condition “novelty”.

The claimed technical solution is illustrated by the following drawings:

FIG. 1 - oil separator, a General view in section;

FIG. 2 - the same, arrows show the movement of crankcase gases.

The oil separator of the crankcase ventilation system of the internal combustion engine comprises a housing 1 having an inlet 2 for receiving a gas-oil mixture from the engine and an outlet 3 for discharging the separated gases, as well as a drain pipe 4 for oil.

Inside the housing 1, a central axial element 5 is installed, on which two partitions are fixed via a spacer 6. Partitions 7 are made with through holes uniformly distributed over the surface. Between the partitions 7 there is an oil precipitation net 8. Such an arrangement of an oil precipitation grid helps to increase the efficiency of oil deposition, as well as to reduce the hydraulic resistance of the moving stream.

The housing is closed on top by a cover 9.

The device operates as follows.

When the crankcase gases pass through the partitions 7 and the oil precipitation grid 8, the oil, which is suspended in the crankcase gases, adheres to them upon impact of the flow, and gradually coarsens to drops. The grid 8, placed between the two partitions, allows you to increase the effect of oil deposition in the oil separator, because the basic principle of separating oil using an oil precipitation grid is directly related to the concept of coalescence. As a result of which, volumetric drops of oil, under the action of gravity, flow down from the oil sieve net, through the openings of the baffle plate and then through the drain pipe 4 and fall back into the engine crankcase.

Particle enlargement and deposition on surfaces occur due to surface tension forces and intermolecular interaction. Thus, the separation of the two-phase flow of a mixture of gas and liquid. Precipitated and coarse particles of oil are prevented from penetrating back into the stream, while partially moving both under the influence of the stream in the direction of its movement and gravity. In the end result, the precipitated oil moves down, and subsequently goes to drain.

The proposed technical solution meets the requirements of industrial applicability and is possible for implementation on standard processing equipment.

Claims (2)

1. The oil separator of the ventilation system of the crankcase of an internal combustion engine, comprising a housing having an inlet for receiving a gas-oil mixture from the engine and an outlet for discharging separated gases, as well as a drain pipe for oil, an oil settling net, characterized in that it further comprises a central axial element on which two partitions having through holes are fixed through the spacer, while the oil-deposition net is placed between the said partitions. 2. The oil separator according to claim 1, characterized in that the housing consists of two parts, one of which is made in the form of a cover.

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