Low-resistance multi-layer composite oil-gas separator

Abstract

The invention relates to the technical field of oil-gas separators, and discloses a low-resistance multilayer composite oil-gas separator which comprises a main body piece, the main body piece comprises a barrel body, a filter element is installed on the inner side of the barrel body, the side wall of the upper portion of the barrel body communicates with a gas inlet pipe, and an oil discharge pipe is arranged on the inner side of the lower portion of the barrel body; the oil discharge pipe penetrates through the side wall of the barrel body and is communicated with an oil discharge nozzle on the outer side; a filter element is arranged in the barrel body, a flow guide part is arranged on the outer side of the filter element and installed on the inner side of the barrel body, an oil collecting part is fixedly connected to the lower side of the filter element, the center of the filter element and the center of the oil collecting part are communicated with an oil return part, and an outer side exhaust cavity and an inner side exhaust cavity are formed in the inner side of the filter element. Through the special material and structural design of the multi-layer composite filter element and the optimized flow guide device, the resistance of oil gas flowing in the separator is greatly reduced, compared with a traditional oil-gas separator, the resistance can be reduced by 30%-50%, and the energy consumption of an air compressor is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of oil-gas separator technology, specifically a low-resistance multilayer composite oil-gas separator. Background Technology

[0002] Oil-gas separators are key components in power machinery such as internal combustion engines and air compressors, as well as hydraulic systems. Their function is to separate oil droplets from the gas mixture, ensuring the cleanliness of the discharged gas, while reducing oil consumption and emissions.

[0003] In air compressor systems, traditional oil-gas separators suffer from high resistance, which not only increases energy consumption but can also affect overall performance and lifespan. Traditional oil-gas separators often employ cyclone separation, baffle impact, or single-media filtration, resulting in limited separation efficiency, high flow resistance, susceptibility to clogging, and short maintenance cycles. Especially under high-flow, high-oil-content conditions, single-layer or simple separators struggle to balance efficient separation with low pressure drop, leading to increased compressor back pressure and impacting power and economy. Furthermore, existing separators often lack real-time monitoring and control capabilities for separation status, making them unsuitable for variable operating conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a low-resistance multilayer composite oil-gas separator to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-resistance multilayer composite oil-gas separator, comprising a main body, the main body including a barrel, a filter element installed on the inner side of the barrel, an air inlet pipe connected to the upper side wall of the barrel, and an oil drain pipe provided on the lower inner side of the barrel, the oil drain pipe passing through the side wall of the barrel and connected to an oil drain nozzle on its outer side; A flow guide is provided on the outside of the filter element, and the flow guide is installed on the inside of the barrel. An oil collection component is fixedly connected to the lower side of the filter element. An oil return component is connected to the center of the filter element and the oil collection component. An outer exhaust chamber and an inner exhaust chamber are provided on the inside of the filter element. A control component and a detection component are connected to the upper side of the outer exhaust chamber and the inner exhaust chamber.

[0006] Furthermore, the main body includes a bracket and a lid. The bracket is fixedly connected to the lower outer side of the barrel body, and the lid is fixedly connected to the upper side of the barrel body. The upper edge of the filter element is snapped between the lid and the barrel body.

[0007] Furthermore, the filter element includes a coarse filter layer, a medium filter layer, a high-efficiency filter layer, and an inner mesh layer. The inner mesh layer is snapped between the lid and the body, and a sealing ring is provided at the contact points between the upper edge of the inner mesh layer and the lid and body. A high-efficiency filter layer is fixedly connected to the outside of the inner mesh layer, a medium filter layer is fixedly connected to the outside of the high-efficiency filter layer, a mesh layer is fixedly connected to the outside of the medium filter layer, a coarse filter layer is provided on the outside of the mesh layer, and the coarse filter layer is fixedly connected to the inner mesh layer.

[0008] Furthermore, the mesh layer and the coarse filter layer form an outer exhaust chamber, and the inner side of the coarse filter layer forms an inner exhaust chamber.

[0009] Furthermore, the coarse filter layer is made of a large-pore fiber material. Gas first passes through this layer, intercepting larger oil droplets. This material has a high porosity, allowing the oil-gas mixture to pass through quickly, initially intercepting larger oil droplets and particulate impurities. Its unique fiber arrangement forms a tortuous channel, enabling sufficient collisions between the oil and gas as they flow, promoting the aggregation of large oil droplets. Large oil droplets and particulate impurities are initially intercepted and aggregated, while larger oil droplets fall to the bottom of the container under gravity. The medium-efficiency filter layer is made of glass fiber material. Its structure features a gradient pore size, with larger pores near the coarse filter layer that gradually decrease in size towards the interior. The medium-efficiency filter layer (glass fiber, with pores gradually decreasing in size from the outside in) then enters the final layer. The glass fiber material has a finer fiber diameter, enabling further filtration of smaller oil droplets. The glass fiber is treated with an oleophobic coating, making it less prone to oil droplet adhesion and reducing resistance. The gradient pore size design allows for progressively finer filtration of oil and gas as they pass through. The high-efficiency filter layer is made of small-pore glass fiber material, with a pore size smaller than that of the medium-efficiency filter layer. Finally, the filter undergoes ultimate fine filtration through the high-efficiency filter layer (small-pore oil-absorbing glass fiber material). Under the combined action of gravity, centrifugal force, diffusion, interception, and inertial impaction coagulation, tiny oil droplets are further separated, achieving the coagulation and retention of ultrafine oil mist. It also possesses excellent self-cleaning properties, preventing oil droplets from easily remaining on its surface, significantly reducing filtration resistance and ensuring structural stability.

[0010] Furthermore, the flow guide includes a spiral blade and a flow guide cover. The flow guide cover is fixedly installed on the inner upper wall of the barrel through a connecting block. The flow guide cover corresponds to the air inlet pipe. The spiral blade is fixedly connected to the inner side of the barrel. The spiral blade surrounds the outer side of the filter element and has a gap with the filter element.

[0011] The oil-gas mixture enters the upper part of the filter cartridge through the inlet pipe. The airflow first impacts the guide shroud, diffusing and slowing down; then, guided by the spiral blades, it forms a rotating downward flow field on the inner wall of the cartridge. This ensures uniform flow on the outside of the filter element, guiding the oil-gas mixture evenly through the filter element and avoiding excessively fast or slow flow rates in certain areas, thereby reducing overall flow resistance. The size and shape of the guide channel are optimized to maintain a stable flow velocity and pressure within it. Furthermore, the oil collecting component includes an oil collecting shell, a baffle one, a baffle two, a partition one, a partition two, a baffle three, and a baffle four. The oil collecting shell is fixedly connected to the lower side of the coarse filter layer, a partition one is fixedly connected to the lower side of the mesh layer, a baffle one is fixedly connected to the inner side of the oil collecting shell, a baffle two is fixedly connected to the outer side of the partition one, a partition two is fixedly connected to the lower side of the inner mesh layer, a baffle three is fixedly connected to the inner side of the partition one, and a baffle four is fixedly connected to the outer side of the partition two. Serrated grooves are provided between baffle one and baffle two, and between baffle three and baffle four.

[0012] Oil droplets condensed in the medium-efficiency and high-efficiency filter layers flow downwards through the serrated grooves between baffle one and baffle two, or through the serrated grooves between baffle two and baffle four, and accumulate at the bottom of the oil collection tank. Baffle one, baffle two, and baffle four prevent the upper gas from agitating the oil collected at the bottom. The oil collected at the bottom returns to the air compressor's lubrication system through the oil return pipe; the oil at the bottom of the oil collection tank can also return to the air compressor's lubrication system through the oil drain pipe. Furthermore, the control assembly includes an exhaust nozzle 1, an exhaust nozzle 2, a solenoid valve 1, a connecting pipe 1, a connecting pipe 2, a solenoid valve 2, and an exhaust main pipe. The upper side of the bucket lid is connected to the exhaust nozzle 1, and the upper side of the exhaust nozzle 1 is connected to the connecting pipe 1. The exhaust nozzle 1 is connected to the inner exhaust chamber. The upper side of the bucket lid is connected to the exhaust nozzle 2, and the upper side of the exhaust nozzle 2 is connected to the connecting pipe 2. The exhaust nozzle 2 is connected to the outer exhaust chamber. A solenoid valve 1 is installed on the connecting pipe 1, and a solenoid valve 2 is installed on the connecting pipe 2. The upper sides of the connecting pipe 1 and the connecting pipe 2 are connected to the exhaust main pipe.

[0013] Furthermore, the oil return component includes an oil return nozzle and an oil return pipe. The oil return nozzle is connected to the upper side of the barrel cover, and an oil return pipe is provided inside the oil return nozzle. The lower end of the oil return pipe extends into the bottom of the oil collection shell, and the oil return pipe and the oil return nozzle are connected by threads.

[0014] Furthermore, the detection component includes pressure sensor one and pressure sensor two. Pressure sensor one and pressure sensor two are respectively connected to the upper side of the bucket lid. Pressure sensor one is connected to the outer exhaust chamber, and pressure sensor two is connected to the inner exhaust chamber.

[0015] The filtered clean gas enters the inner exhaust chamber through the high-efficiency filter layer, flows into the exhaust main pipe and is discharged outward through exhaust nozzle 1, connecting pipe 1, and solenoid valve 1. When pressure sensor 1 detects a large pressure in the outer exhaust chamber and pressure sensor 2 detects a small pressure in the inner exhaust chamber, it can be determined that the filtration capacity of the medium-efficiency filter layer and the high-efficiency filter layer is saturated. At this time, solenoid valve 2 opens, and some of the oil-gas separated gas, after being separated by the high-efficiency filter layer, enters the exhaust main pipe from the outer exhaust chamber through exhaust nozzle 2 and connecting pipe 2 and is discharged outward.

[0016] Solenoid valve one and solenoid valve two can automatically adjust the two exhaust channels based on the pressure difference signal between pressure sensor one (monitoring the outer exhaust side chamber) and pressure sensor two (monitoring the inner exhaust chamber), balance the filter element load, and maintain low resistance operation.

[0017] Compared with the prior art, the present invention provides a low-resistance multilayer composite oil-gas separator, which has the following beneficial effects: 1. This low-resistance multi-layer composite oil-gas separator, through the special material and structural design of its multi-layer composite filter element and optimized flow guiding device, significantly reduces the resistance of oil and gas flow within the separator. Compared to traditional oil-gas separators, its resistance can be reduced by 30%-50%, effectively reducing the energy consumption of the air compressor. High-efficiency separation: Through multi-layer filtration, it can achieve efficient separation of oil droplets of different sizes, reducing the oil content in compressed air to an extremely low level, meeting the compressed air quality requirements of most industrial production. Good stability: The high-strength and stable filter element structure ensures the stability and reliability of the separator during long-term operation, reducing the probability of failure.

[0018] 2. This low-resistance, multi-layer composite oil-gas separator, through a combination of a guide shroud and spiral blades, creates a uniform and stable rotating flow field for the oil-gas mixture before it enters the filter element. This avoids airflow short-circuiting or localized erosion, creating low-resistance and high-efficiency flow conditions for subsequent filtration. Employing a three-layer composite filter element structure (coarse, medium, and high efficiency) with gradually varying pore sizes and oleophobic treatment, it achieves step-by-step interception and coalescence separation of oil droplets from large to small. This design, while ensuring high separation accuracy (effectively handling ultrafine oil mist), significantly reduces the overall airflow resistance of the filter element by optimizing airflow distribution and material surface properties, thereby helping to reduce the overall energy consumption of the air compressor system.

[0019] 3. This low-resistance multi-layer composite oil-gas separator, by incorporating sensors that monitor the pressure in the outer and inner chambers of the filter element and linking them to control the solenoid valves on the parallel exhaust pipe, allows the system to sense the filter element's clogging status (load) in real time. When an increase in local resistance of the filter element is detected, the bypass can be automatically opened to guide part of the airflow, thereby intelligently balancing the throughput load of each filter layer and preventing abnormal increases in resistance. This proactive adjustment mechanism not only helps maintain the relative stability of the system's operating resistance over a longer period but also slows down the clogging process of the filter element, extends its overall service life, and reduces maintenance frequency. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another angle; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a three-dimensional structural diagram of the barrel body after sectional cutting. Figure 5 This is a three-dimensional structural diagram of the flow guide of the present invention; Figure 6 This is a three-dimensional structural diagram of the flow guide of the present invention from another angle; Figure 7 This is a cross-sectional three-dimensional structural diagram of the oil collecting component of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle; Figure 9 This is a three-dimensional structural diagram of the oil collection component of the present invention, cut from another angle. Figure 10 This is a schematic diagram of the planar cross-section structure of the present invention; Figure 11 This is a schematic diagram of the planar cross-sectional structure of the filter element of the present invention.

[0021] In the diagram: 1. Main body; 11. Bracket; 12. Barrel body; 13. Barrel lid; 2. Air inlet pipe; 3. Oil outlet pipe; 4. Filter element; 41. Coarse filter layer; 42. Medium filter layer; 43. High efficiency filter layer; 44. Inner mesh layer; 5. Flow guide; 51. Spiral blade; 52. Flow guide cover; 6. Oil collection component; 61. Oil collection shell; 62. Baffle one; 63. Baffle two; 64. Partition one; 65. Partition two; 66. Baffle three; 67. Baffle four; 7. Oil return component; 71. Oil return nozzle; 72. Oil return pipe; 8. Control component; 81. Exhaust nozzle one; 82. Exhaust nozzle two; 83. Solenoid valve one; 84. Connecting pipe one; 85. Connecting pipe two; 86. Solenoid valve two; 87. Exhaust main pipe; 9. Detection component; 91. Pressure sensor one; 92. Pressure sensor two. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0023] Please see Figures 1-11 A low-resistance multi-layer composite oil-gas separator includes a main body 1, which includes a barrel 12. A filter element 4 is installed on the inner side of the barrel 12. An air inlet pipe 2 is connected to the upper side wall of the barrel 12. An oil drain pipe 3 is provided on the lower inner side of the barrel 12. The oil drain pipe 3 passes through the side wall of the barrel 12 and is connected to the oil drain nozzle on its outer side.

[0024] A flow guide 5 is provided on the outside of the filter element 4. The flow guide 5 is installed on the inside of the barrel 12. An oil collection component 6 is fixedly connected to the lower side of the filter element 4. An oil return component 7 is connected to the center of the filter element 4 and the oil collection component 6. An outer exhaust chamber and an inner exhaust chamber are provided on the inside of the filter element 4. An adjustment component 8 and a detection component 9 are connected to the upper side of the outer exhaust chamber and the inner exhaust chamber.

[0025] Furthermore, the main body 1 includes a bracket 11 and a lid 13. The bracket 11 is fixedly connected to the lower outer side of the barrel body 12, and the lid 13 is fixedly connected to the upper side of the barrel body 12. The upper edge of the filter element 4 is snapped between the lid 13 and the barrel body 12.

[0026] Furthermore, the filter element 4 includes a coarse filter layer 41, a medium filter layer 42, a high-efficiency filter layer 43, and an inner mesh layer 44. The inner mesh layer 44 is snapped between the lid 13 and the body 12, and a sealing ring is provided at the contact points between the upper edge of the inner mesh layer 44 and the lid 13 and the body 12. The high-efficiency filter layer 43 is fixedly connected to the outside of the inner mesh layer 44, the medium filter layer 42 is fixedly connected to the outside of the high-efficiency filter layer 43, the mesh layer is fixedly connected to the outside of the medium filter layer 42, and a coarse filter layer 41 is provided on the outside of the mesh layer. The coarse filter layer 41 is fixedly connected to the inner mesh layer 44.

[0027] Furthermore, the mesh layer and the coarse filter layer 41 form an outer exhaust chamber, and the inner side of the coarse filter layer 41 forms an inner exhaust chamber.

[0028] Furthermore, the coarse filter layer 41 is made of a large-pore fiber material. The gas first passes through the coarse filter layer 41 (large-pore fiber material), intercepting the remaining larger oil droplets. This material has a large porosity, which allows the oil-gas mixture to pass through quickly, initially intercepting larger oil droplets and particulate impurities. Its special fiber arrangement forms tortuous channels, allowing the oil and gas to collide fully when flowing through them, promoting the aggregation of large oil droplets. Large oil droplets and particulate impurities are initially intercepted and aggregated, while larger oil droplets fall to the bottom of the barrel 12 under the action of gravity.

[0029] The medium-efficiency filter layer 42 is made of glass fiber material. Its structure features a gradient pore size, with larger pores near the coarse filter layer 41 that gradually decrease in size towards the interior. The glass fiber material, with its finer fiber diameter, further filters smaller oil droplets. The glass fiber is treated with an oleophobic coating, making it less prone to oil droplet adhesion and reducing resistance. This gradient pore design, with larger pores near the coarse filter layer and gradually decreasing in size towards the interior, allows for progressively finer filtration of oil and gas as they pass through.

[0030] The high-efficiency filter layer 43 is made of small-pore glass fiber material, with a pore size smaller than that of the medium-efficiency filter layer 42. Finally, the high-efficiency filter layer 43 (small-pore oil-absorbing glass fiber material) performs ultimate fine filtration. Under the combined action of gravity, centrifugal force, diffusion, interception, and inertial impaction coagulation, tiny oil droplets are further separated, achieving the coagulation and retention of ultra-fine oil mist. It also possesses excellent self-cleaning properties, preventing oil droplets from easily remaining on its surface, greatly reducing filtration resistance and ensuring structural stability.

[0031] Furthermore, the flow guide 5 includes a spiral blade 51 and a flow guide shroud 52. The flow guide shroud 52 is fixedly installed on the inner upper wall of the barrel 12 through a connecting block. The flow guide shroud 52 corresponds to the air inlet pipe 2. The spiral blade 51 is fixedly connected to the inner side of the barrel 12. The spiral blade 51 surrounds the outer side of the filter element 4 and there is a gap between the spiral blade 51 and the filter element 4.

[0032] The oil-gas mixture enters the upper part of the barrel 12 through the inlet pipe 2. The airflow first impacts the guide shroud 52, diffusing and slowing down; then it is guided along the spiral blades 51 to form a rotating downward flow field on the inner wall of the barrel. This achieves uniform flow on the outside of the filter element 4, guiding the oil-gas mixture evenly through the filter element 4, avoiding excessively fast or slow local flow velocities, thereby reducing overall flow resistance. The size and shape of the guide channel are optimized to maintain a stable flow velocity and pressure when the oil and gas flow within it.

[0033] Furthermore, the oil collecting component 6 includes an oil collecting shell 61, a first baffle 62, a second baffle 63, a first partition 64, a second partition 65, a third baffle 66, and a fourth baffle 67. The oil collecting shell 61 is fixedly connected to the lower side of the coarse filter layer 41, the first partition 64 is fixedly connected to the lower side of the mesh layer, the first baffle 62 is fixedly connected to the inner side of the oil collecting shell 61, the second baffle 63 is fixedly connected to the outer side of the first partition 64, the second partition 65 is fixedly connected to the lower side of the inner mesh layer 44, the third baffle 66 is fixedly connected to the inner side of the first partition 64, and the fourth baffle 67 is fixedly connected to the outer side of the second partition 65.

[0034] Serrated grooves are provided between baffle 1 62 and baffle 2 63, and between baffle 3 66 and baffle 4 67.

[0035] Oil droplets condensed in the medium-efficiency filter layer 42 and the high-efficiency filter layer 43 flow downwards through the serrated grooves between baffle 1 62 and baffle 2 63, or through the serrated grooves between baffle 2 63 and baffle 4 67, and accumulate at the bottom of the oil collection tank 61. Baffle 1 62, baffle 2 63, baffle 2 63, and baffle 4 67 prevent the upper gas from agitating the oil collected at the bottom. The oil collected at the bottom returns to the air compressor's lubrication system through the oil return pipe 72; the oil at the bottom of the oil collection tank 61 can also return to the air compressor's lubrication system through the oil drain pipe 3.

[0036] Furthermore, the control component 8 includes an exhaust nozzle 1 81, an exhaust nozzle 2 82, a solenoid valve 1 83, a connecting pipe 1 84, a connecting pipe 2 85, a solenoid valve 2 86, and an exhaust main pipe 87. The upper side of the bucket lid 13 is connected to the exhaust nozzle 1 81, and the upper side of the exhaust nozzle 1 81 is connected to the connecting pipe 1 84. The exhaust nozzle 1 81 is connected to the inner exhaust chamber. The upper side of the bucket lid 13 is connected to the exhaust nozzle 2 82, and the upper side of the exhaust nozzle 2 82 is connected to the connecting pipe 2 85. The exhaust nozzle 2 82 is connected to the outer exhaust chamber. A solenoid valve 1 83 is installed on the connecting pipe 1 84, and a solenoid valve 2 86 is installed on the connecting pipe 2 85. The upper side of the connecting pipe 1 84 and the connecting pipe 2 85 is connected to the exhaust main pipe 87.

[0037] Furthermore, the oil return component 7 includes an oil return nozzle 71 and an oil return pipe 72. The oil return nozzle 71 is connected to the upper side of the barrel cover 13, and the oil return pipe 72 is provided inside the oil return nozzle 71. The lower end of the oil return pipe 72 extends into the bottom of the oil collection shell 61, and the oil return pipe 72 is connected to the oil return nozzle 71 by threads.

[0038] Furthermore, the detection component 9 includes pressure sensor 1 91 and pressure sensor 2 92. Pressure sensor 1 91 and pressure sensor 2 92 are respectively connected to the upper side of the lid 13. Pressure sensor 1 91 is connected to the outer exhaust chamber, and pressure sensor 2 92 is connected to the inner exhaust chamber.

[0039] The filtered clean gas enters the inner exhaust chamber through the high-efficiency filter layer 43, passes through the exhaust nozzle 81 and connecting pipe 84, and flows into the exhaust main pipe 87 for discharge.

[0040] When pressure sensor 191 detects a large pressure in the outer exhaust chamber and pressure sensor 292 detects a small pressure in the inner exhaust chamber, it can be determined that the filtration capacity of the medium-efficiency filter layer 42 and the high-efficiency filter layer 43 is saturated. At this time, solenoid valve 286 opens, and some of the oil-gas separated gas, after being separated by the high-efficiency filter layer 43, enters the exhaust main pipe 87 from the outer exhaust chamber through the exhaust nozzle 282 and the connecting pipe 285 and is discharged outward.

[0041] Solenoid valve 1 83 and solenoid valve 2 86 can automatically adjust the two exhaust channels based on the pressure difference signal between pressure sensor 1 91 (monitoring the outer exhaust side chamber) and pressure sensor 2 92 (monitoring the inner exhaust chamber), balance the filter element load, and maintain low resistance operation.

[0042] In air compressor systems, maintaining a low pressure differential (i.e., a small pressure difference between the inlet and outlet) offers numerous benefits to overall system performance, operating costs, and lifespan. 1. Reduced Energy Consumption: Air compressors need to overcome system pressure differences to compress air. Lower pressure differentials reduce the driving force required by the compressor. According to the law of conservation of energy, the electrical energy or other energy consumed by the compressor will also decrease accordingly. For example, in a large industrial air compressor system, reducing the pressure differential from 0.5 bar to 0.2 bar can reduce compressor energy consumption by 10%-15%, significantly saving operating costs. 2. Improved Energy Efficiency: A low pressure differential means smoother air flow within the system, reducing energy loss during flow. This allows the energy input to the compressor to be more effectively converted into the potential energy of the compressed air, improving the overall energy efficiency of the air compressor system. 3. Enhanced Equipment Performance and Stable Supply Pressure: A low pressure differential helps maintain stable supply pressure. In some production processes that require high air pressure stability, such as electronic chip manufacturing and precision instrument processing, stable air pressure ensures the normal operation of production equipment and improves product quality and yield. If the pressure difference is too large, the supply pressure will fluctuate, potentially leading to unstable equipment operation and affecting product quality. 4. Increased exhaust volume: When the system pressure difference decreases, the compressor can output more compressed air at the same power. This is because a lower pressure difference reduces airflow resistance, allowing the compressor to more easily compress and deliver air to the system, thereby increasing the system's exhaust volume and meeting the needs of more air-consuming equipment. 5. Extended equipment life and reduced component wear: In a low-pressure-difference environment, the pressure and load on various components of the air compressor are relatively smaller. For example, the wear rate of moving parts such as compressor pistons, valves, and bearings is slower when operating under a lower pressure difference. This reduces the frequency of component replacement, lowers equipment maintenance costs, and extends the overall service life of the equipment. 6. Reduced heat load: When the pressure difference is too large, air generates more heat during compression, leading to an increased heat load on the equipment. A low pressure difference reduces heat generation during compression, lowering the operating temperature of the equipment. Lower temperatures help protect equipment seals and lubricants, preventing them from aging and being damaged by high temperatures, thus further extending the equipment's lifespan. 7. Ensuring system reliability and reducing the probability of failure: A stable low-pressure-difference environment makes the air compressor system operate more stably, reducing failures caused by pressure fluctuations and excessively high pressure differentials. For example, excessive pressure differentials can lead to loose pipe connections, valve damage, and other problems, while low pressure differentials can reduce the probability of these failures, improving system reliability and stability. 8. Facilitating system maintenance and management: Low-pressure-difference systems are easier to monitor and maintain during operation.Because of the smaller pressure fluctuations, the system's parameters are more stable, allowing maintenance personnel to more accurately judge the equipment's operating status, promptly identify and address potential problems, and ensure the system's normal operation.

[0043] The specific usage and function of this embodiment are as follows: The oil-gas mixture enters the upper part of the barrel 12 through the inlet pipe 2. The airflow first impacts the guide shroud 52, diffusing and slowing down; then it is guided along the spiral blades 51 to form a rotating downward flow field on the inner wall of the barrel. This achieves uniform flow on the outside of the filter element 4, guiding the oil-gas mixture evenly through the filter element 4, avoiding excessively fast or slow local flow velocities, thereby reducing overall flow resistance. The size and shape of the guide channel are optimized to maintain a stable flow velocity and pressure when the oil and gas flow within it.

[0044] The gas first passes through the coarse filter layer 41 (large-pore fiber material), which intercepts the remaining larger oil droplets. This material has a large porosity, allowing the oil-gas mixture to pass through quickly, initially intercepting larger oil droplets and particulate impurities. Its special fiber arrangement forms tortuous channels, allowing the oil and gas to collide fully as they flow, promoting the aggregation of large oil droplets. Large oil droplets and particulate impurities are initially intercepted and aggregated, while the larger oil droplets fall to the bottom of the tank 12 under the action of gravity. The oil then enters the medium-efficiency filter layer 42 (glass fiber, with pores gradually decreasing in size from the outside to the inside). Using glass fiber material, its finer fiber diameter allows for further filtration of smaller oil droplets. The glass fiber undergoes an oleophobic treatment, making it less prone to oil droplet adsorption on its surface, thus reducing oil droplet adhesion to the filter layer and consequently decreasing resistance. This filter layer is designed with a gradient pore size, with larger pores near the coarse-efficiency filter layer and gradually decreasing in size towards the interior. This allows for progressively finer filtration of oil and gas as they pass through.

[0045] Finally, the oil undergoes ultimate filtration through high-efficiency filter layer 43 (small-pore oil-absorbing glass fiber material). Under the combined action of various forces, including gravity, centrifugal force, diffusion, blocking, and inertial collision coagulation, tiny oil droplets are further separated, achieving the coagulation and retention of ultrafine oil mist. It also possesses excellent self-cleaning properties, preventing oil droplets from easily remaining on its surface, thus significantly reducing filtration resistance and ensuring structural stability.

[0046] Oil droplets condensed in the medium-efficiency filter layer 42 and the high-efficiency filter layer 43 flow downwards through the serrated grooves between baffle 1 62 and baffle 2 63, or through the serrated grooves between baffle 2 63 and baffle 4 67, and accumulate at the bottom of the oil collection tank 61. Baffle 1 62, baffle 2 63, baffle 2 63, and baffle 4 67 prevent the upper gas from agitating the oil collected at the bottom. The oil collected at the bottom returns to the air compressor's lubrication system through the oil return pipe 72; the oil at the bottom of the oil collection tank 61 can also return to the air compressor's lubrication system through the oil drain pipe 3.

[0047] The filtered clean gas enters the inner exhaust chamber through the high-efficiency filter layer 43, passes through the exhaust nozzle 81 and connecting pipe 84, and flows into the exhaust main pipe 87 for discharge.

[0048] When pressure sensor 191 detects a large pressure in the outer exhaust chamber and pressure sensor 292 detects a small pressure in the inner exhaust chamber, it can be determined that the filtration capacity of the medium-efficiency filter layer 42 and the high-efficiency filter layer 43 is saturated. At this time, solenoid valve 286 opens, and some of the oil-gas separated gas, after being separated by the high-efficiency filter layer 43, enters the exhaust main pipe 87 from the outer exhaust chamber through the exhaust nozzle 282 and the connecting pipe 285 and is discharged outward.

[0049] Solenoid valve 1 83 and solenoid valve 2 86 can automatically adjust the two exhaust channels based on the pressure difference signal between pressure sensor 1 91 (monitoring the outer exhaust side chamber) and pressure sensor 2 92 (monitoring the inner exhaust chamber), balance the filter element load, and maintain low resistance operation.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-resistance multilayer composite oil-gas separator, comprising a main body (1), the main body (1) including a barrel (12), wherein a filter element (4) is installed on the inner side of the barrel (12), characterized in that: The upper side wall of the barrel (12) is connected to an air inlet pipe (2), and the lower inner side of the barrel (12) is provided with an oil drain pipe (3). The oil drain pipe (3) passes through the side wall of the barrel (12) and is connected to the oil drain nozzle on its outer side. The filter element (4) is provided with a flow guide (5) on the outside. The flow guide (5) is installed on the inside of the barrel (12). The filter element (4) is fixedly connected to the lower side with an oil collection component (6). The filter element (4) and the oil collection component (6) are connected to the center with an oil return component (7). The filter element (4) is provided with an outer exhaust chamber and an inner exhaust chamber on the inside. The upper side of the outer exhaust chamber and the inner exhaust chamber is connected to a control component (8) and a detection component (9).

2. The low-resistance multilayer composite oil-gas separator according to claim 1, characterized in that: The main body (1) includes a bracket (11) and a bucket lid (13). The bracket (11) is fixedly connected to the lower outer side of the bucket body (12), and the bucket lid (13) is fixedly connected to the upper side of the bucket body (12). The upper edge of the filter element (4) is snapped between the bucket lid (13) and the bucket body (12).

3. The low-resistance multilayer composite oil-gas separator according to claim 2, characterized in that: The filter element (4) includes a coarse filter layer (41), a medium filter layer (42), a high-efficiency filter layer (43), and an inner mesh layer (44). The inner mesh layer (44) is snapped between the lid (13) and the body (12). A sealing ring is provided at the contact points between the upper edge of the inner mesh layer (44) and the lid (13) and the body (12). The high-efficiency filter layer (43) is fixedly connected to the outside of the inner mesh layer (44). The medium filter layer (42) is fixedly connected to the outside of the high-efficiency filter layer (43). A mesh layer is fixedly connected to the outside of the medium filter layer (42). A coarse filter layer (41) is provided on the outside of the mesh layer. The coarse filter layer (41) is fixedly connected to the inner mesh layer (44).

4. The low-resistance multilayer composite oil-gas separator according to claim 3, characterized in that: The mesh layer and the coarse filter layer (41) form an outer exhaust chamber, and the inner side of the coarse filter layer (41) forms an inner exhaust chamber.

5. A low-resistance multilayer composite oil-gas separator according to claim 3, characterized in that: The coarse filter layer (41) is made of large-pore fiber material, the medium filter layer (42) is made of glass fiber material, the structure of the medium filter layer (42) is designed with a gradient pore size, the pore size is larger on the side near the coarse filter layer (41) and gradually becomes smaller towards the inside, and the high-efficiency filter layer (43) is made of small-pore glass fiber material and is smaller than the pore size of the medium filter layer (42).

6. The low-resistance multilayer composite oil-gas separator according to claim 1, characterized in that: The flow guide (5) includes a spiral blade (51) and a flow guide shroud (52). The flow guide shroud (52) is fixedly installed on the inner upper wall of the barrel (12) by a connecting block. The flow guide shroud (52) corresponds to the air inlet pipe (2). The spiral blade (51) is fixedly connected to the inner side of the barrel (12). The spiral blade (51) surrounds the outer side of the filter element (4) and there is a gap between it and the filter element (4).

7. A low-resistance multilayer composite oil-gas separator according to claim 3, characterized in that: The oil collecting component (6) includes an oil collecting shell (61), a first baffle (62), a second baffle (63), a first partition (64), a second partition (65), a third baffle (66), and a fourth baffle (67). The lower side of the coarse filter layer (41) is fixedly connected to the oil collecting shell (61). The lower side of the mesh layer is fixedly connected to the first partition (64). The inner side of the oil collecting shell (61) is fixedly connected to the first baffle (62). The outer side of the first partition (64) is fixedly connected to the second baffle (63). The lower side of the inner mesh layer (44) is fixedly connected to the second partition (65). The inner side of the first partition (64) is fixedly connected to the third baffle (66). The outer side of the second partition (65) is fixedly connected to the fourth baffle (67). Serrated grooves are provided between baffle one (62) and baffle two (63), and between baffle three (66) and baffle four (67).

8. A low-resistance multilayer composite oil-gas separator according to claim 2, characterized in that: The control component (8) includes an exhaust nozzle 1 (81), an exhaust nozzle 2 (82), a solenoid valve 1 (83), a connecting pipe 1 (84), a connecting pipe 2 (85), a solenoid valve 2 (86), and an exhaust main pipe (87). The upper side of the bucket lid (13) is connected to the exhaust nozzle 1 (81), and the upper side of the exhaust nozzle 1 (81) is connected to the connecting pipe 1 (84). The exhaust nozzle 1 (81) is connected to the inner exhaust chamber. The upper side of the bucket lid (13) is connected to the exhaust nozzle 2 (82), and the upper side of the exhaust nozzle 2 (82) is connected to the connecting pipe 2 (85). The exhaust nozzle 2 (82) is connected to the outer exhaust chamber. A solenoid valve 1 (83) is installed on the connecting pipe 1 (84), and a solenoid valve 2 (86) is installed on the connecting pipe 2 (85). The upper sides of the connecting pipe 1 (84) and the connecting pipe 2 (85) are connected to the exhaust main pipe (87).

9. A low-resistance multilayer composite oil-gas separator according to claim 7, characterized in that: The oil return component (7) includes an oil return nozzle (71) and an oil return pipe (72). The upper side of the barrel cover (13) is connected to the oil return nozzle (71), and the inner side of the oil return nozzle (71) is provided with an oil return pipe (72). The lower end of the oil return pipe (72) extends into the bottom of the oil collection shell (61), and the oil return pipe (72) and the oil return nozzle (71) are connected by threads.

10. A low-resistance multilayer composite oil-gas separator according to claim 2, characterized in that: The detection component (9) includes pressure sensor one (91) and pressure sensor two (92). Pressure sensor one (91) and pressure sensor two (92) are respectively connected to the upper side of the bucket lid (13). Pressure sensor one (91) is connected to the outer exhaust chamber, and pressure sensor two (92) is connected to the inner exhaust chamber.

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