CN202659303U - Oil return line of turbosupercharger - Google Patents

Abstract

The utility model discloses an oil return line of a turbosupercharger. The oil return line comprises a supercharger oil return pipe and a supercharger oil return degassing pipe with one end connected to the middle upper part of the supercharger oil return pipe; the upper end inlet of the supercharger oil return pipe is connected with the oil return flange of the turbosupercharger, while the lower end outlet of the supercharger oil return pipe is connected with the oil return opening of an engine body; the oil return opening is formed in a position under the engine oil level of an oil pan; the other end of the supercharger oil return degassing pipe is communicated with a degassing opening formed on the engine body; and when the engine is inclined at the maximal angle, the degassing opening is higher than the engine oil level of the oil pan in position. The oil return line of the turbosupercharger is simple and rational in structure; the engine oil lubricating and cooling the supercharger is capable of smoothly returning through the additional of the degassing function; as a result, the pressure of the oil return chamber of the supercharger is kept in an acceptable range; and therefore, oil pumping of the supercharger is prevented.

Description

Turbocharger oil return line

technical field

The utility model relates to the field of engines, in particular to an oil return pipeline of a turbocharger.

Background technique

Turbochargers have been widely used in engines because of their effectiveness in increasing engine power, reducing fuel consumption, and improving emissions. The turbocharger is lubricated and cooled by the engine oil, and most of the turbocharger oil return types are gravity return, that is, the oil flows out along the pipeline by the gravity of the oil itself.

The existing oil inlet and return methods of the turbocharger: The oil inlet of the turbocharger is connected to the main oil passage of the engine, and the oil inlet pressure is generally between (70-500) kPa. The oil return port of the turbocharger is connected to the oil return port of the engine body (such as the oil return port of the body, the oil return port of the crankcase or the oil return port of the oil pan) through the oil return pipe, and the oil return port of the engine body is located in the engine The oil pan is above the liquid level of the oil (to facilitate the discharge of gas in the oil return pipe, preventing the gas from blocking the oil return pipe and hindering the oil return), and lower than the oil return port of the turbocharger, and there is a sufficient drop. The oil under its own gravity Back to the oil.

The existing turbocharger oil return method does not have a degassing pipeline, and the position of the oil return port of the engine body must be above the oil level of the engine oil pan to facilitate the discharge of the gas in the oil return pipe and prevent the gas from blocking the oil return pipe and hindering the oil return. Oil. At this time, the pressure of the oil return chamber inside the seal ring of the supercharger is lower than the back air pressure of the impeller outside the seal ring. But this turbocharger oil return mode has following shortcoming: 1, be not suitable for the little engine of the oil return port height drop of turbocharger oil return port and engine body. If the position of the oil return port of the engine body is above the liquid level of the oil pan, but the height drop is small and the oil return pressure is insufficient, then when the car goes uphill or downhill, the engine will lean forward or backward, and when the height difference is further reduced, It will lead to poor oil return or oil pouring into the supercharger, causing oil leakage in the supercharger. 2. It is especially not suitable for engines where the oil return port of the engine body is below the oil level of the oil pan. Since the existing turbocharger oil return method does not have a degassing pipeline, if the oil return port of the engine body is below the oil level of the oil pan, the gas in the oil return pipe of the turbocharger cannot be discharged, hindering the oil return. As a result, the pressure in the oil return chamber of the supercharger is too large, and the oil escapes from the opening of the seal ring to the compressor end or turbine end of the supercharger under the action of the excessive pressure in the oil return chamber, that is, the oil in the supercharger escapes. At this time, with the existing turbocharger oil return method, the engine oil cannot flow out smoothly.

Utility model content

The utility model is to overcome the defects in the above-mentioned prior art and provides a simple and reasonable structure. oil in the turbocharger return line.

In order to achieve the above purpose, according to the utility model, a turbocharger oil return pipeline is provided, including: a supercharger oil return pipe and a supercharger oil return and degassing pipe connected to the middle and upper part of the supercharger oil return pipe; The upper inlet of the oil return pipe of the turbocharger is connected to the oil return flange of the turbocharger, and the lower outlet is connected to the oil return port of the engine body, and the oil return port is opened below the oil level of the oil pan; the oil return and degassing pipe of the turbocharger The other end communicates with the degassing port provided on the engine body; when the engine is at the maximum tilt angle, the position of the degassing port is higher than the oil level of the oil sump.

In the above technical solution, the degassing port is provided on the crankcase, the body or the cylinder head cover.

In the above technical solution, the oil return and degassing pipe of the supercharger includes: an inverted U-shaped rubber hose and a degassing pipe; the air inlet of the inverted U-shaped rubber hose is connected with the oil return pipe of the supercharger, and the air outlet is connected with the air inlet of the degassing pipe. The gas outlet of the trachea communicates with the degassing port.

In the above technical solution, the two ports of the inverted U-shaped hose are tightened and sealed by hoops.

In the above technical solution, the oil return pipe of the supercharger is also provided with an expansion joint, and is fixed to the engine body through a bracket.

Compared with the prior art, the utility model has the following beneficial effects: the structure of the oil return pipeline of the turbocharger is simple and reasonable, and by increasing the degassing function, the engine oil for lubricating and cooling the supercharger can return to the oil smoothly, so that the supercharger The pressure in the oil return chamber of the supercharger is kept within an acceptable range, thereby preventing oil blow-by of the supercharger. At the same time, the oil return port is opened below the oil level of the oil pan, which greatly reduces the requirement for a large height difference between the oil return port of the turbocharger and the oil return port of the engine body, and the turbocharger can be arranged at the bottom of the engine. Low position, oil can be returned smoothly when the height difference is small, and it can also effectively prevent the engine from being tilted too much when the car goes uphill or downhill, resulting in poor oil return, ineffective lubrication and cooling of the supercharger, and damage to the supercharger. In addition, it is especially suitable for the oil return of the turbocharger of the horizontal engine. Because the height of the horizontal engine is limited, the location of the supercharger cannot be arranged high enough, resulting in a too small height difference between the oil return port of the turbocharger and the oil return port of the engine body, resulting in poor oil return of the supercharger and oil leakage. . After adopting this device, the position of the turbocharger can be arranged at a low position, as long as the position of the oil return port of the turbocharger is slightly higher than the oil level of the oil pan.

Description of drawings

Fig. 1 is the application state structure diagram of the turbocharger oil return line of the utility model;

Fig. 2 is the structural representation of the oil return pipeline of the turbocharger of the present utility model;

Fig. 3 is a structural schematic diagram of a supercharger oil return pipe of a turbocharger oil return line of the present invention;

Explanation of reference signs:

1-supercharger oil return pipe, 11-first bracket, 12-upper inlet, 13-lower outlet, 14-degassing joint, 15-expansion joint, 2-supercharger oil return and degassing pipe, 21-inverted U-shaped Rubber hose, 22-degassing pipe, 23-second bracket, 24-ring hoop, 25-right port, 3-turbocharger, 4-engine body.

Detailed ways

A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment. It should be understood that the "upper", "lower", "left", "right", "front" and "reverse" mentioned in the following embodiments of the present utility model are all based on the directions shown in the figures , These words used to limit directions are only for convenience of description, and do not represent limitations on the specific technical solutions of the present utility model.

As shown in FIG. 1 and FIG. 2 , the oil return pipeline of the turbocharger of the present invention includes: a supercharger oil return pipe 1 and a supercharger oil return and degassing pipe 2 . The oil return pipe 1 of the supercharger is fixed on the engine body 4 by the first support 11 to prevent the oil return pipe from being damaged due to excessive vibration.

Wherein, as shown in Figure 3, the upper end inlet 12 of the turbocharger oil return pipe 1 is connected with the oil return flange of the turbocharger 3, and is sealed with a gasket; the lower end outlet 13 of the supercharger oil return pipe 1 is connected to the engine body 4 is connected to the oil return port and sealed with a gasket or an O-ring. The oil return port of the engine body 4 is opened at the position below the oil level of the oil sump. The upper part of the supercharger oil return pipe 1 is welded with a degassing joint 14, and the head of the degassing joint 14 is designed with a flange structure. The position of the degassing joint 14 is higher than the position of the oil level of the oil sump, so as to discharge the gas in the oil return pipe, and prevent the gas from blocking the oil return pipe and hindering the oil return. An expansion joint 15 is also arranged between the degassing joint 14 and the lower end outlet 13 , and the upper end of the bracket 11 is welded and fixed between the expansion joint 15 and the lower end outlet 13 .

As shown in FIG. 1 and FIG. 2 , the oil return and degassing pipe 2 of the supercharger includes: an inverted U-shaped rubber hose 21 and a degassing pipe 22 , and the degassing pipe 22 is fixed to the engine body 4 through a second bracket 23 . The left port of the inverted U-shaped rubber hose 21 communicates with the degassing joint 14 of the supercharger oil return pipe 1, and is tightly sealed with a hoop 24. The right port of the inverted U-shaped rubber hose 21 communicates with the left port of the degassing pipe 22, and is tightly sealed with a hoop. The right port 25 of the degassing pipe 22 communicates with the degassing port provided on the engine body 4. The position of opening should be as high as possible, and can be set on the crankcase, body or cylinder head cover, so that when the engine is at the maximum inclination angle (such as when the car goes uphill or downhill), the position of the degassing port of the engine body 4 must be higher than Oil pan oil level. The degassing port of the engine body 4 is connected with the crankcase ventilation device or the oil-gas separation ventilation device of the cylinder head cover (connecting the cylinder head cover with the atmosphere), so that the pressure of the degassing port of the engine body 4 is equal to or slightly greater than the atmospheric pressure, generally at 2kPa (relative pressure), and then ensure that the air pressure of the degassing port of the engine body 4 is not greater than 2kPa (relative pressure), so as to discharge the gas in the oil return pipe, prevent the gas from blocking the oil return pipe, hinder the oil return, and effectively prevent oil leakage. The inverted U-shaped design of the inverted U-shaped hose 21 enables gas to pass through the inverted U-shaped hose 21 and enter the degassing port of the engine body 4, while preventing oil from flowing into the degassing pipe 22 for oil return.

When the turbocharger 3 returns oil, the machine oil flows to the oil return port of the engine body 4 along the supercharger oil return pipe 1 under the effect of its own gravity, and then enters the engine oil pan. When the turbocharger returns oil, the engine oil is not full of the turbocharger oil return pipe 1, and generally only accounts for half of the oil return pipe diameter. The gas carried out from the turbocharger 3 (including the gas that enters the oil return chamber of the turbocharger from the compressor end and the turbine end of the turbocharger, and the air bubbles contained in the lubricating oil) enters along the inverted U-shaped hose 21 The degassing pipe 22 enters the degassing port of the engine body 4 again. And the degassing port of the engine body 4 links to each other with the crankcase ventilation device or the cylinder head cover oil-gas separation ventilation device (the cylinder head cover is communicated with the atmosphere). Therefore, the pressure of the degassing port of the engine body 4 is equal to or slightly greater than the atmospheric pressure, generally within 2kPa (relative pressure), and the pressure of the oil return chamber of the turbocharger 3 communicates with the degassing port of the engine body 4, and the pressure is the same, within 2kPa It can effectively prevent oil leakage.

The oil return pipeline of the turbocharger has a simple and reasonable structure. By adding the degassing function, the oil for lubricating and cooling the supercharger can return to the oil smoothly, so that the pressure in the oil return chamber of the supercharger can be kept within an acceptable range, thereby preventing Supercharger leaking oil. At the same time, the oil return port is opened below the oil level of the oil pan, which greatly reduces the requirement for a large height difference between the oil return port of the turbocharger and the oil return port of the engine body, and the turbocharger can be arranged at the bottom of the engine. Low position, oil can be returned smoothly when the height difference is small, and it can also effectively prevent the engine from being tilted too much when the car goes uphill or downhill, resulting in poor oil return, ineffective lubrication and cooling of the supercharger, and damage to the supercharger. In addition, it is especially suitable for the oil return of the turbocharger of the horizontal engine. Because the height of the horizontal engine is limited, the location of the supercharger cannot be arranged high enough, resulting in a too small height difference between the oil return port of the turbocharger and the oil return port of the engine body, resulting in poor oil return of the supercharger and oil leakage. . After adopting this device, the position of the turbocharger can be arranged at a low position, as long as the position of the oil return port of the turbocharger is slightly higher than the oil level of the oil pan.

The above disclosures are only a few specific embodiments of the utility model, but the utility model is not limited thereto, and any changes conceivable by those skilled in the art should fall within the protection scope of the utility model.

Claims (5)

1. A turbocharger oil return pipeline is characterized in that it comprises: a supercharger oil return pipe and an end connected to the supercharger oil return and degassing pipe in the upper part of the supercharger oil return pipe; the supercharger The upper inlet of the oil return pipe is connected to the oil return flange of the turbocharger, and the lower outlet is connected to the oil return port of the engine body, and the oil return port is opened below the oil level of the oil pan; the turbocharger return The other end of the oil degassing pipe communicates with the degassing port provided on the engine body; when the engine is at the maximum tilt angle, the position of the degassing port is higher than the oil level of the oil sump. 2. The oil return pipeline of the turbocharger according to claim 1, characterized in that: the degassing port is opened on the crankcase, the machine body or the cylinder head cover. 3. The turbocharger oil return pipeline according to claim 1, characterized in that: the supercharger oil return and degassing pipe comprises: an inverted U-shaped rubber hose and a degassing pipe; the air inlet of the inverted U-shaped rubber hose It communicates with the oil return pipe of the supercharger, the gas outlet communicates with the air inlet of the degassing pipe, and the gas outlet of the degassing pipe communicates with the degassing port. 4. The oil return pipeline of the turbocharger according to claim 3, characterized in that: the two ports of the inverted U-shaped hose are tightened and sealed by hoops. 5. The turbocharger oil return pipe according to any one of claims 1 to 4, characterized in that: the turbocharger oil return pipe is also provided with an expansion joint, and is fixed to the engine body through a bracket.

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