External oil-gas separation device

Abstract

An external oil-gas separation device comprises a shell, a gas distribution pipe and an oil baffle plate, and is characterized in that the shell is provided with a gas inlet pipe, the gas inlet pipe is connected with a cylinder head cover, an oil-gas storage cavity is formed in the shell, the gas distribution pipe is connected with the shell, and the oil baffle plate is installed between the oil-gas storage cavity and the gas distribution pipe. The shell is provided with an oil outlet pipe, the oil outlet pipe is connected with the engine oil chamber, the gas distribution pipe is provided with an exhalation channel, and the exhalation channel is connected with a carburetor. The oil-gas separation device is simple in structure, low in cost and convenient to operate and maintain, and a user can maintain the oil-gas separation device under the condition that the oil-gas separation device is not disassembled.

Description

Technical Field

[0001] The utility model relates to the field of gasoline engines, in particular to an external oil-gas separation device for a small four-stroke gasoline engine. Background Art

[0002] Small four-stroke gasoline engines are widely used in the fields of lawn mowers. During operation, the engine provides power, which is transmitted through the gear box to drive the cutter to rotate at high speed, and the high-speed rotation of the cutter is used to achieve mowing.

[0003] The oil-gas separation device of a traditional gasoline engine is mainly installed in the cylinder head cover. When the engine is running, the oil-gas mixture is separated inside the cylinder head cover. The oil returns to the oil chamber through the oil passage, and the gas is exhaled into the air filter through the breathing tube and enters the combustion chamber through the intake duct for combustion. This structure requires the oil-gas separation device to be integrated inside the cylinder head cover, resulting in a large cylinder head cover, and the components used must withstand high temperatures. In order to ensure the reliability of the connection, the oil-gas separation device is usually fixed by riveting, resulting in high costs and troublesome maintenance. Summary of the invention

[0004] In order to overcome the above problems, the purpose of the present invention is to provide an external oil-gas separation device, which has the advantages of simple structure, low cost, easy operation and maintenance, and enables users to maintain the oil-gas separation device without disassembling the cylinder head cover.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] An external oil-gas separation device comprises a shell, an air distribution pipe and an oil baffle plate, and is characterized in that: the shell is provided with an intake pipe, the intake pipe is connected to a cylinder head cover, an oil-gas storage chamber is provided in the shell, the air distribution pipe is connected to the shell, an oil baffle plate is installed between the oil-gas storage chamber and the air distribution pipe, the shell is provided with an oil outlet pipe, the oil outlet pipe is connected to an engine oil chamber, the air distribution pipe is provided with an exhalation channel, and the exhalation channel is connected to a carburetor.

[0007] With this arrangement, after the oil-gas mixture is exhaled through the cylinder head cover, it enters the oil-gas storage chamber through the intake pipe. After being cooled by the oil-gas separation block, the oil is gradually separated to form oil droplets, which flow into the oil outlet pipe under the action of gravity. The oil outlet pipe is connected to the oil chamber of the gasoline engine, and the oil droplets are sucked into the oil chamber by negative pressure; the separated gas enters the air distribution pipe through the oil baffle, and is then exhaled from the air distribution pipe, enters the carburetor together with the air, and finally enters the combustion chamber for combustion.

[0008] As a preferred solution of the utility model, a one-way valve is installed in the air intake pipe.

[0009] This arrangement ensures that the oil-gas mixture can only flow in one direction and cannot flow back.

[0010] This arrangement ensures that the oil-gas mixture and the separated oil droplets move in one direction and cannot flow back.

[0011] As a preferred solution of the utility model, an oil-gas separation block is provided in the oil-gas storage cavity, and the oil-gas separation block needs to be press-fitted into the oil-gas storage cavity.

[0012] Such an arrangement ensures the reliability of the oil-gas separation block after installation and prevents it from falling off due to the vibration of the machine.

[0013] As a preferred solution of the utility model, the oil baffle plate is provided with an exhalation hole, and the exhalation hole is arranged at an upper center position of the oil baffle plate.

[0014] Such an arrangement ensures the cooling of the oil baffle, the separation of oil and gas, and the separated gas enters the distribution pipe through the exhalation hole and enters the carburetor.

[0015] As a preferred solution of the utility model, a one-way valve is installed in the oil outlet pipe.

[0016] This arrangement ensures that the separated oil droplets can only flow in one direction and cannot flow back.

[0017] As a preferred solution of the utility model, the connection between the gas distribution pipe and the shell is sealed.

[0018] Such an arrangement ensures the sealing pressure and gas fluidity of the oil-gas separation device.

[0019] The beneficial effects of the utility model are as follows: the utility model has a simple structure, low cost, and convenient operation and maintenance, and enables the user to perform maintenance on the oil-gas separation device without disassembling the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiment and its description are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 This is a schematic diagram of the internal structure of the external oil-gas separation device of the utility model.

[0022] Description of the serial numbers in the attached drawings:

[0023] 1. Intake pipe; 2. Oil outlet pipe; 3. One-way valve; 4. Oil-gas separation block; 5. Oil baffle plate; 6. Air distribution pipe; 7. Cylinder head cover; 8. Oil chamber; 9. Exhalation hole; 10. Carburetor; 11. Housing; 12. Exhalation channel; 13. Oil-gas storage chamber. DETAILED DESCRIPTION

[0024] It should be noted that the directional nouns that may be involved in the following paragraphs, including but not limited to "up, down, left, right, front, back, inside, outside", etc., are based on the viewing orientations shown in the corresponding drawings of the specification. Their purpose is only to facilitate technicians in this field to better understand the technical solution of the utility model, and they should not be regarded as limiting the protection scope or technical solution of the utility model.

[0025] It should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "assembly", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the invention of the utility model can be understood according to the specific circumstances.

[0026] The utility model will be further described below in conjunction with the accompanying drawings.

[0027] like Figure 1 As shown, an external oil-gas separation device includes a shell 11, an air distribution pipe 6, and an oil baffle plate 5. An intake pipe 1 is provided on the shell 11, and the intake pipe 1 is connected to the cylinder head cover 7. An oil-gas storage chamber 13 is provided in the shell 11, and the air distribution pipe 6 is connected to the shell 11. An oil baffle plate 5 is installed between the oil-gas storage chamber 13 and the air distribution pipe 6. An oil outlet pipe 2 is provided on the shell 11, and the oil outlet pipe 2 is connected to the engine oil chamber 8. The air distribution pipe 6 is provided with an exhalation channel 12, and the exhalation channel 12 is connected to the carburetor 10. A one-way valve 3 is installed in the intake pipe 1, and an oil-gas separation block 4 is installed in the oil-gas storage chamber 13. An exhalation hole 9 is provided on the oil baffle plate 5, and the exhalation hole 9 is arranged at the upper center of the oil baffle plate 5. A one-way valve 3 is installed in the oil outlet pipe 2, and the connection between the air distribution pipe 6 and the shell 11 is sealed.

[0028] Specifically, the oil-gas mixture exhaled by the cylinder head cover passes through the pipeline through the intake pipe 1 equipped with a one-way valve 3, and enters the oil-gas storage chamber 13 in the shell 11. After the cooling and separation action of the oil-gas separation block 4, oil droplets are formed. The oil droplets pass through the oil outlet pipe 2 equipped with a one-way valve 3. Due to the negative pressure of the gasoline engine, the oil droplets are sucked into the oil chamber 8. The separated gas enters the air distribution pipe 6 through the exhalation hole 9 on the oil baffle 5, and is then exhaled through the air distribution pipe 6, passes through the carburetor 10, and finally enters the combustion chamber for combustion.

[0029] The above drawings and descriptions only represent the preferred embodiments of the utility model and are not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model are included in the protection scope of the utility model.

Claims

1. An external oil-gas separation device, comprising a housing, an air distribution pipe, and an oil baffle, characterized in that: The shell is provided with an intake pipe, which is connected to the cylinder head cover; an oil and gas storage chamber is provided in the shell, the air distribution pipe is connected to the shell, an oil baffle is installed between the oil and gas storage chamber and the air distribution pipe; the shell is provided with an oil outlet pipe, which is connected to the engine oil chamber; the air distribution pipe is provided with an exhalation channel, which is connected to the carburetor.

2. The external oil-gas separation device according to claim 1, characterized in that: A one-way valve is installed in the air intake pipe.

3. The external oil-gas separation device according to claim 1, characterized in that: An oil-gas separation block is arranged in the oil-gas storage cavity, and the oil-gas separation block is press-fitted into the oil-gas storage cavity.

4. The external oil-gas separation device according to claim 1, characterized in that: The oil baffle plate is provided with an exhalation hole, and the exhalation hole is arranged at an upper center position of the oil baffle plate.

5. The external oil-gas separation device according to claim 1, characterized in that: A one-way valve is installed in the oil outlet pipe.

6. The external oil-gas separation device according to claim 1, characterized in that: The connection between the gas distribution pipe and the shell is sealed.

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