Maintenance-free integrated oil and gas separator

Abstract

This invention relates to a maintenance-free integrated oil-gas separator, comprising a housing and an oil filter assembly and an oil-gas separator assembly integrated on the housing. The oil-gas separator assembly includes an outer shell and an inner shell, with an air inlet chamber formed between the outer and inner shells. The air inlet chamber has an air inlet port, and an air outlet pipe is provided in the upper middle part of the inner shell. The bottom of the inner shell is connected to an oil return groove. The inner shell wall has a plurality of nozzle holes communicating with its internal cavity. A nail plate is disposed in the internal cavity of the inner shell corresponding to the nozzle holes. This invention integrates the nail plate onto the inner shell of the oil-gas separator, using an impact-type oil-gas separation method for efficient oil-gas separation without the need for maintenance.

Description

Technical Field

[0001] This invention relates to an oil-gas separation device, specifically to a maintenance-free integrated oil-gas separator. Background Technology

[0002] With increasingly stringent emission regulations, oil consumption and exhaust emissions are receiving more and more attention in automotive design. To reduce oil carryover in crankcase blow-by, designing an efficient crankcase ventilation system is crucial. Currently, many closed-loop crankcase ventilation systems exist on the market, characterized by high integration, primarily consisting of a plastic cylinder head cover, a labyrinth oil-gas separator, and a diaphragm pressure regulating valve. However, the shape and size of the cover and the structure of the diaphragm can functionally affect the cover's sealing and the internal system pressure, leading to gas leakage. Furthermore, given the numerous sealing elements in engine design, and the need for lightweight, integrated systems to reduce maintenance costs, designing a maintenance-free, integrated oil-gas separator is essential. Summary of the Invention

[0003] The purpose of this invention is to solve the above problems by providing a maintenance-free integrated oil-gas separator. This invention integrates the oil filter assembly and the oil-gas separator assembly on the same housing, reducing size and saving space. At the same time, the nail plate is integrated on the inner housing of the oil-gas separator, and the impact-type oil-gas separation method is used to achieve efficient oil-gas separation without the need for maintenance.

[0004] The specific technical solution of the present invention is as follows:

[0005] A maintenance-free integrated oil-gas separator includes a housing and an oil filter assembly and an oil-gas separator assembly integrated on the housing. The oil-gas separator assembly includes an outer shell and an inner shell, with an air inlet chamber formed between the outer shell and the inner shell. The air inlet chamber has an air inlet port. An air outlet pipe is provided in the upper middle part of the inner shell, and the bottom of the inner shell is connected to an oil return groove. The inner shell wall has a plurality of nozzle holes communicating with its internal cavity. A nail plate is provided in the internal cavity of the inner shell corresponding to the nozzle holes.

[0006] Furthermore, the nail plate includes a base plate and a plurality of nail teeth structures arranged perpendicular to the base plate.

[0007] Furthermore, the spike structure has a trapezoidal top.

[0008] Furthermore, a bypass valve is provided on the inner shell. The bypass valve includes a valve body, a spring, and a valve seat. The valve body and the spring are installed on the valve seat. In normal operation, the valve body keeps the bypass valve in a sealed state under the action of the spring. Under high pressure in the intake chamber, the valve body is opened.

[0009] Furthermore, the outer shell and inner shell of the oil-gas separator are rotatably installed into the main body of the oil-gas separator through a snap-fit ​​structure with a self-locking function, and are sealed at the top and bottom by using O-rings.

[0010] Furthermore, a heat insulation plate is installed on the outside of the oil-gas separator assembly.

[0011] Furthermore, the oil-gas separator assembly and the oil filter assembly are made of high-temperature resistant plastic.

[0012] Furthermore, the oil filter assembly includes a housing and a filter element installed within the housing.

[0013] Furthermore, the vent pipe has a certain length, with its lower end located in the middle of the inner shell cavity and its upper end opening to the outside.

[0014] The specific working principle of this invention is as follows: The filter housing has two sets of pipelines, corresponding to the oil filter assembly and the oil-gas separator assembly respectively. The oil filter assembly filters the oil, and the oil-gas mixture flows through the air inlet of the oil-gas separator assembly and through the swirl vanes of the inner shell of the oil-gas separator. Large oil droplets are separated first by inertia and gravity. The remaining gas then flows through multiple nozzle holes on the inner shell of the oil-gas separator and accelerates to collide with the nail plate. The surface of the nail plate is arranged with a large number of conical structures to increase the diffusion of the mixed gas, so that the oil particles in the oil-gas mixture are separated a second time. The separated clean gas flows out through the air outlet pipe, achieving the purpose of efficient oil-gas separation and avoiding maintenance.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Lightweight design: The oil filter and crankcase ventilation system are integrated into one unit. The oil filter assembly and oil-gas separator assembly are integrated into the same housing, reducing size and saving space; at the same time, the use of high-temperature resistant materials effectively reduces product weight redundancy.

[0017] 2. Maintenance: The impact-type nail plate structure integrates the nail plate into the inner shell of the oil-gas separator, using an impact-type oil-gas separation method to achieve efficient oil-gas separation without the need for maintenance.

[0018] 3. Safe and reliable: The self-locking internal snap-fit ​​structure prevents accidental operation during installation, which could lead to improper installation of the product.

[0019] 4. Safe and reliable: Effectively reduces the sealing area and lowers the possibility of sealing performance failure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an integrated oil-gas separator.

[0021] Figure 2 This is a cross-sectional structural diagram of an integrated oil-gas separator.

[0022] Figure 3 This is a schematic diagram of the oil-gas separator assembly.

[0023] Figure 4 This is a schematic diagram of an oil-gas separator assembly with a heat insulation plate.

[0024] Figure 5 , 6 This is a cross-sectional structural diagram of the oil-gas separator assembly;

[0025] Figure 7 , 8 This is a schematic diagram of the inner shell structure of the oil-gas separator assembly;

[0026] Figure 9 , 10 This is a cross-sectional structural diagram of the oil-gas separator assembly;

[0027] In the diagram: 100-oil-gas separator assembly, 200-oil filter assembly, 3-heat insulation plate, 101-outer shell; 102-inner shell; 103-nail plate; 104-air outlet pipe; 105-nozzle orifice; 106-bypass valve; 107-O-ring; 201-oil filter housing; 202-filter element. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 , 2 A maintenance-free integrated oil-gas separator includes a housing and an oil filter assembly 200 and an oil-gas separator assembly 100 integrated on the housing. The oil-gas separator assembly 100 and the oil filter assembly 200 are made of high-temperature resistant plastic. The oil filter assembly 200 includes an oil filter housing 201 and a filter element 202 installed in the oil filter housing 201. A heat insulation plate 300 is provided on the outside of the oil-gas separator assembly 100. By integrating the oil filter assembly and the oil-gas separator assembly on the same housing, the size of the device can be reduced and space can be saved.

[0030] like Figure 3-5The oil-gas separator assembly 100 includes an outer shell 101 and an inner shell 102. The outer shell 101 and the inner shell 102 are rotatably installed to form the main body of the oil-gas separator via a self-locking snap-fit ​​structure, and are sealed at the top and bottom by O-rings 107. An air inlet chamber is formed between the outer shell 101 and the inner shell 102, and the air inlet chamber has an air inlet. An air outlet pipe 104 is provided on the upper part of the inner shell 102. The air outlet pipe 104 has a certain length, with its lower end located in the middle of the cavity of the inner shell 102 and its upper end opening to the outside. The bottom of the inner shell 102 is connected to the oil return groove. Figure 6 , 7 The inner shell 102 has several nozzle holes 105 communicating with its internal cavity on its wall surface. The inner shell 102 has a nail plate 103 corresponding to the nozzle holes 105 in its internal cavity. The nail plate 103 includes a base plate and multiple nail tooth structures arranged perpendicular to the base plate. The nail tooth structure has a trapezoidal top, which helps to separate the gas and liquid of high pressure and high speed airflow.

[0031] During operation, the filter housing has two sets of pipelines, corresponding to the oil filter assembly and the oil-gas separator assembly respectively. The oil filter assembly filters the engine oil, and the oil-gas mixture flows through the air inlet of the oil-gas separator assembly and through the swirl vanes of the inner shell of the oil-gas separator. Large oil droplets are separated first by inertia and gravity. The remaining gas then flows through multiple nozzle holes 105 on the inner shell of the oil-gas separator and is accelerated to collide with the nail plate 103. The surface of the nail plate 103 is arranged with a large number of conical structures to increase the diffusion of the mixed gas, so that the oil particles in the oil-gas mixture are separated a second time. The separated clean gas flows out through the air outlet pipe, achieving the purpose of efficient oil-gas separation and avoiding maintenance.

[0032] like Figure 8 , 9 10. A bypass valve 106 is provided on the inner shell 102. The bypass valve 106 includes a valve body, a spring and a valve seat. The valve body and the spring are installed on the valve seat. Under normal working conditions, the valve body keeps the bypass valve 106 in a sealed state under the action of the spring. When the air inlet chamber is under high pressure, the valve body is opened and the high pressure gas flows to the outlet pipe through the bypass valve. The bypass valve 106 ensures the safety of use under ultra-high pressure conditions.

[0033] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A maintenance-free integrated oil-gas separator, characterized in that, Includes a housing and an oil filter assembly (200) and an oil-gas separator assembly (100) integrated on the housing. The oil-gas separator assembly (100) includes an outer shell (101) and an inner shell (102). An air intake chamber is formed between the outer shell (101) and the inner shell (102). The air intake chamber is provided with an air inlet. An air outlet pipe (104) is provided on the upper part of the inner shell (102). The bottom of the inner shell (102) is connected to the oil return groove. The inner shell (102) has a plurality of nozzle holes (105) communicating with its internal cavity on its wall surface, and nail plates (103) are provided in the internal cavity of the inner shell (102) corresponding to the nozzle holes (105). The nail plate (103) includes a base plate and a plurality of nail teeth structures arranged perpendicular to the base plate; The spike-tooth structure has a trapezoidal top, which helps in the gas-liquid separation of high-pressure, high-speed airflow. During operation, the filter housing has two sets of pipelines, corresponding to the oil filter assembly (200) and the oil-gas separator assembly (100) respectively. The oil is filtered through the oil filter assembly (200), and the oil-gas mixture flows through the air inlet of the oil-gas separator assembly (100) and through the swirl plate of the inner shell (102) of the oil-gas separator. Large oil droplets are separated first by inertia and gravity, and the remaining gas flows through multiple nozzle holes (105) on the inner shell (102) of the oil-gas separator and accelerates to collide with the nail plate (103). The surface of the nail plate (103) is arranged with a large number of conical structures to increase the diffusion of the mixed gas, so that the oil particles in the oil-gas mixture are separated a second time. The separated clean gas flows out through the air outlet pipe (104), achieving the purpose of efficient oil-gas separation and avoiding maintenance.

2. The maintenance-free integrated oil-gas separator according to claim 1, characterized in that, A bypass valve (106) is provided on the inner shell (102). The bypass valve (106) includes a valve body, a spring and a valve seat. The valve body and the spring are installed on the valve seat. In normal operation, the valve body keeps the bypass valve (106) sealed under the action of the spring. Under high pressure in the air inlet chamber, the valve body is opened.

3. The maintenance-free integrated oil-gas separator according to claim 1, characterized in that, The outer shell (101) and inner shell (102) of the oil-gas separator are rotated and installed into the main body of the oil-gas separator through a self-locking snap-fit ​​structure, and are sealed at the top and bottom by using O-rings (107).

4. The maintenance-free integrated oil-gas separator according to claim 1, characterized in that, The oil-gas separator assembly (100) is provided with a heat insulation plate (300).

5. The maintenance-free integrated oil-gas separator according to claim 1, characterized in that, The oil-gas separator assembly (100) and the oil filter assembly (200) are made of high-temperature resistant plastic.

6. The maintenance-free integrated oil-gas separator according to claim 1, characterized in that, The oil filter assembly (200) includes an oil filter housing (201) and a filter element (202) installed in the oil filter housing (201).

7. The maintenance-free integrated oil-gas separator according to claim 1, characterized in that, The vent pipe (104) has a certain length, with its lower end located in the middle of the cavity of the inner shell (102) and its upper end leading to the outside.

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