An oil-gas separator for use in the crankcase of marine diesel engines

Abstract

This invention discloses an oil-gas separator for use in the crankcase of a marine diesel engine, comprising an oil-gas separation structure, an intake airflow structure, an outlet airflow structure, and a lubricating oil recovery structure. The oil-gas separation structure is located at the vent of the diesel engine crankcase. The intake port of the intake airflow structure is connected to the vent of the diesel engine crankcase, and the outlet of the intake airflow structure is connected to the intake port of the oil-gas separation structure. The outlet of the outlet airflow structure is connected to the intake port of the exhaust system. The oil inlet of the lubricating oil recovery structure is connected to the oil outlet of the oil-gas separation structure, and the oil outlet of the lubricating oil recovery structure is connected to the oil inlet of the intake airflow structure. This invention can separate water from the lubricating oil and then recover the lubricating oil, reducing the lubricating oil consumption rate. It can effectively separate water vapor from the lubricating oil, greatly facilitating the oil-gas separation operation at the vent of the diesel engine crankcase.

Description

Technical Field

[0001] This invention relates to the field of oil-gas separation technology in marine diesel engine crankcases, and particularly to an oil-gas separator for use in marine diesel engine crankcases. Background Technology

[0002] An oil-gas separator is a device that separates crude oil and associated natural gas produced from an oil well. The oil-gas separator is placed between the submersible centrifugal pump and the protector, separating free gas from the well fluid. The liquid is sent to the submersible centrifugal pump, while the gas is released into the annular space between the tubing and casing.

[0003] An oil-gas separator is a device installed on the upper side of the crankcase vent of a diesel engine to separate the oil and gas escaping from the crankcase. During diesel engine operation, the high temperature of the crankcase causes the lubricating oil to vaporize into a large amount of oil and gas, resulting in oil loss and environmental pollution. Therefore, an oil-gas separator needs to be installed at the crankcase vent of the diesel engine.

[0004] Currently, the oil-gas separator located at the vent of the diesel engine crankcase has a relatively complex overall structure, is bulky, and has high manufacturing costs. In addition, the existing oil-gas separator is difficult to effectively separate water vapor from lubricating oil, which causes some lubricating oil to be discharged, bringing great difficulties to the oil-gas separation work at the vent of the diesel engine crankcase. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention aims to provide an oil-gas separator for use in the crankcase of a marine diesel engine. This oil-gas separator has a reasonable overall design, simple structure, convenient operation, and reduced manufacturing costs. It can effectively separate water vapor from lubricating oil, preventing lubricating oil from being discharged from the exhaust system, and bringing great convenience to the oil-gas separation work at the vent of the diesel engine crankcase.

[0006] To solve the above technical problems, the present invention adopts the following technical solution:

[0007] An oil-gas separator for use in the crankcase of a marine diesel engine, characterized in that it includes:

[0008] An oil-gas separation structure capable of effectively separating the oil-gas mixture discharged from the vent of the diesel engine crankcase, wherein the oil-gas separation structure is located at the vent of the diesel engine crankcase.

[0009] An intake flow structure is provided that can introduce the oil-gas mixture discharged from the vent of the diesel engine crankcase into the interior of the oil-gas separation structure. The intake port of the intake flow structure is connected to the vent of the diesel engine crankcase, and the outlet of the intake flow structure is connected to the intake port of the oil-gas separation structure.

[0010] An exhaust drainage structure is provided that can introduce water vapor separated by the oil-gas separation structure into the exhaust system. The air inlet of the exhaust drainage structure is connected to the air outlet of the oil-gas separation structure, and the air outlet of the exhaust drainage structure is connected to the air inlet of the exhaust system.

[0011] An oil recovery structure is provided that can recover the lubricating oil separated by the oil-gas separation structure and return it to the crankcase of the diesel engine. The oil inlet of the oil recovery structure is connected to the oil outlet of the oil-gas separation structure, and the oil outlet of the oil recovery structure is connected to the oil inlet of the intake air diversion structure.

[0012] In a preferred embodiment of the present invention, the oil-gas separation structure includes an oil-gas separation box, a separation air inlet connected to an air inlet drainage structure is provided at the lower end of the oil-gas separation box, a separation air outlet connected to an air outlet drainage structure is provided at the upper end of the oil-gas separation box, and a separation curved plate structure capable of completely separating oil and gas is provided inside the oil-gas separation box.

[0013] In a preferred embodiment of the present invention, the oil-gas separator includes an upper plate, a lower plate, a left side plate, a right side plate, a front side plate, and a rear side plate. The upper plate, lower plate, left side plate, right side plate, front side plate, and rear side plate are welded together to form an integral oil-gas separator with a box structure. The separation air inlet is located at the center of the lower plate, and the separation air outlet is located at the center of the upper plate.

[0014] In a preferred embodiment of the present invention, the separation bending plate structure includes a first bending plate and a second bending plate with an overall U-shaped cross-section and a width smaller than the overall width of the oil-gas separation box. The first bending plate is bent downwards and is generally inclined at the upper part of the oil-gas separation box. One end of the first bending plate is welded to the left side plate and the other end is welded to the right side plate. The second bending plate is bent downwards and is generally inclined at the lower part of the oil-gas separation box. One end of the second bending plate is welded to the left side plate and the other end is welded to the right side plate.

[0015] In a preferred embodiment of the present invention, the separation bending plate structure further includes a pair of third bending plates with an overall L-shaped cross-section. The third bending plates are symmetrically arranged at the middle position of the oil-gas separation box in an inclined manner. One end of the third bending plate is welded to the left side plate and the other end is welded to the right side plate. The straight side of one third bending plate is welded to the front side plate, and the straight side of the other third bending plate is welded to the rear side plate. The bending sides of the two third bending plates face downwards, and a gap is formed between them for water vapor to pass through.

[0016] In a preferred embodiment of the present invention, the intake drainage structure includes an intake steel pipe and an intake flange. The intake flange is welded to the intake end of the intake steel pipe and is connected to the vent of the diesel engine crankcase through the intake flange. The outlet of the intake steel pipe is welded to the separation intake port of the oil-gas separation structure.

[0017] In a preferred embodiment of the present invention, the gas outlet drainage structure includes a gas outlet steel pipe and a gas outlet flange. The gas outlet flange is welded to the gas outlet end of the gas outlet steel pipe and is connected to the gas inlet of the exhaust system through the gas outlet flange. The gas inlet of the gas outlet steel pipe is welded to the gas outlet of the oil-gas separation structure.

[0018] In a preferred embodiment of the present invention, the lubricating oil recovery structure includes an overall U-shaped lubricating oil recovery pipe. The oil inlet of the lubricating oil recovery pipe is connected to the lubricating oil outlet located at a corner of the lower plate via a vertical lubricating oil recovery pipe. The oil outlet of the lubricating oil recovery pipe is connected to the lubricating oil outlet located on one side of the upper part of the air intake steel pipe via a horizontal lubricating oil recovery pipe.

[0019] Compared with the prior art, the oil-gas separator of this invention has a reasonable overall design, simple structure, convenient operation, and reduced manufacturing cost. It can separate water from lubricating oil and then recover the lubricating oil, reducing the lubricating oil consumption rate. It can effectively separate water vapor from lubricating oil, preventing lubricating oil from being discharged from the exhaust system, and bringing great convenience to the oil-gas separation work at the crankcase vent of diesel engines. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the internal structure of the oil-gas separation structure of the present invention.

[0023] Figure 3 This is a longitudinal sectional view of one side of the present invention.

[0024] Figure 4 This is a longitudinal sectional view of the other side of the invention. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0026] Reference Figures 1-4 As shown in the figure, an oil-gas separator for use in the crankcase of a marine diesel engine is provided, including an oil-gas separation structure 100, an intake air diversion structure 200, an outlet air diversion structure 300, and a lubricating oil recovery structure 400.

[0027] The oil-gas separation structure 100 is an oil-gas separation structure that can effectively separate the oil-gas mixture discharged from the vent of the diesel engine crankcase. The oil-gas separation structure is located at the vent of the diesel engine crankcase.

[0028] The intake manifold structure 200 can introduce the oil-gas mixture discharged from the vent of the diesel engine crankcase into the oil-gas separation structure. The intake port of the intake manifold structure 200 is connected to the vent of the diesel engine crankcase 100, and the outlet of the intake manifold structure is connected to the intake port of the oil-gas separation structure.

[0029] The exhaust drainage structure 300 can introduce the water vapor separated by the oil-gas separation structure into the exhaust system. The air inlet of the exhaust drainage structure 300 is connected to the air outlet of the oil-gas separation structure 100, and the air outlet of the exhaust drainage structure 300 is connected to the air inlet of the exhaust system.

[0030] The lubricating oil recovery structure 400 can recover the lubricating oil separated by the oil-gas separation structure and return it to the crankcase of the diesel engine. The oil inlet of the lubricating oil recovery structure 400 is connected to the oil outlet of the oil-gas separation structure, and the oil outlet of the lubricating oil recovery structure 400 is connected to the oil inlet of the intake air diversion structure.

[0031] The oil-gas separation structure 100 includes an oil-gas separation box, a separation air inlet connected to the air inlet diversion structure at the lower end of the oil-gas separation box, a separation air outlet connected to the air outlet diversion structure at the upper end of the oil-gas separation box, and a separation curved plate structure inside the oil-gas separation box that can completely separate oil and gas.

[0032] The oil-gas separator includes an upper plate 110, a lower plate 120, a left side plate 130, a right side plate 140, a front side plate 150, and a rear side plate 160. The upper plate 110, lower plate 120, left side plate 130, right side plate 140, front side plate 150, and rear side plate 160 are welded together to form an integral oil-gas separator with a box-like structure. The separation air inlet is located at the center of the lower plate, and the separation air outlet is located at the center of the upper plate.

[0033] The separation bending plate structure 500 includes a first bending plate 510 and a second bending plate 520 with an overall U-shaped cross-section and a width smaller than the overall width of the oil-gas separation box. The first bending plate 510 is bent downwards and is set at the upper part of the oil-gas separation box. One end of the first bending plate 510 is welded to the left side plate 130 and the other end is welded to the right side plate 140. The second bending plate 520 is bent downwards and is set at the lower part of the oil-gas separation box. One end of the second bending plate 520 is welded to the left side plate 130 and the other end is welded to the right side plate 140. The first bending plate 510 and the second bending plate 520 form a 70° angle with the left side plate.

[0034] The separation bending plate structure also includes a pair of third bending plates 530 with an overall L-shaped cross-section. The third bending plates 530 are symmetrically arranged at the middle position of the oil-gas separation box in an inclined manner. One end of the third bending plate 530 is welded to the left side plate 130 and the other end is welded to the right side plate 140. The straight side of one of the third bending plates 530 is welded to the front side plate 150, and the straight side of the other third bending plate 530 is welded to the rear side plate 160. The bent sides of the two third bending plates face downwards and form a gap between them for water vapor to pass through. The third bending plate 530 forms a 70° angle with the left side plate.

[0035] The intake manifold structure 200 includes an intake steel pipe 210 and an intake flange 220. The intake flange 220 is welded to the intake end of the intake steel pipe 210 and is connected to the vent of the diesel engine crankcase through the intake flange. The outlet of the intake steel pipe is welded to the separation intake port of the oil-gas separation structure.

[0036] The exhaust drainage structure 300 includes an exhaust steel pipe 310 and an exhaust flange 320. The exhaust flange 320 is welded to the exhaust end of the exhaust steel pipe 310 and is connected to the exhaust system inlet through its exhaust flange. The exhaust inlet of the exhaust steel pipe is welded to the separation outlet of the oil-gas separation structure.

[0037] The lubricating oil recovery structure 400 includes an overall U-shaped lubricating oil recovery pipe 410. The oil inlet of the lubricating oil recovery pipe 410 is connected to the lubricating oil outlet located at a corner of the lower plate 120 via a vertical lubricating oil recovery pipe 430. The oil outlet of the lubricating oil recovery pipe 410 is connected to the lubricating oil outlet located on one side of the upper part of the air intake steel pipe 210 via a horizontal lubricating oil recovery pipe 420.

[0038] A cleaning hole is provided at the lowest point of the lubricating oil recovery pipe 410 for cleaning when blockage occurs, and a screw plug 440 is provided on the cleaning hole for sealing.

[0039] In summary, the present invention adopts the above-mentioned structural design, which is reasonable, simple, easy to operate, and reduces manufacturing costs. It can separate water from lubricating oil and then recover the lubricating oil, reducing the lubricating oil consumption rate. It can effectively separate water vapor from lubricating oil, preventing lubricating oil from being discharged from the exhaust system, and bringing great convenience to the oil-gas separation work at the crankcase vent of diesel engines.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An oil-gas separator for use in the crankcase of a marine diesel engine, characterized in that, include An oil-gas separation structure capable of effectively separating the oil-gas mixture discharged from the vent of the diesel engine crankcase, wherein the oil-gas separation structure is located at the vent of the diesel engine crankcase. An intake flow structure is provided that can introduce the oil-gas mixture discharged from the vent of the diesel engine crankcase into the interior of the oil-gas separation structure. The intake port of the intake flow structure is connected to the vent of the diesel engine crankcase, and the outlet of the intake flow structure is connected to the intake port of the oil-gas separation structure. An exhaust drainage structure is provided that can introduce water vapor separated by the oil-gas separation structure into the exhaust system. The air inlet of the exhaust drainage structure is connected to the air outlet of the oil-gas separation structure, and the air outlet of the exhaust drainage structure is connected to the air inlet of the exhaust system. An oil recovery structure is provided that can recover the lubricating oil separated by the oil-gas separation structure and return it to the crankcase of the diesel engine. The oil inlet of the oil recovery structure is connected to the oil outlet of the oil-gas separation structure, and the oil outlet of the oil recovery structure is connected to the oil inlet of the intake air diversion structure. The oil-gas separation structure includes an oil-gas separation box, a separation air inlet connected to the air inlet diversion structure at the lower end of the oil-gas separation box, a separation air outlet connected to the air outlet diversion structure at the upper end of the oil-gas separation box, and a separation bent plate structure that can completely separate oil and gas inside the oil-gas separation box. The oil-gas separator includes an upper plate, a lower plate, a left side plate, a right side plate, a front side plate, and a rear side plate. The upper plate, lower plate, left side plate, right side plate, front side plate, and rear side plate are welded together to form an integral oil-gas separator with a box structure. The separation air inlet is located at the center of the lower plate, and the separation air outlet is located at the center of the upper plate. The separation bending plate structure includes a first bending plate and a second bending plate with an overall U-shaped cross-section and a width smaller than the overall width of the oil-gas separation box. The first bending plate is bent downwards and is inclined overall at the upper position of the oil-gas separation box. One end of the first bending plate is welded to the left side plate and the other end is welded to the right side plate. The second bending plate is bent downwards and is inclined overall at the lower position of the oil-gas separation box. One end of the second bending plate is welded to the left side plate and the other end is welded to the right side plate. The separation bending plate structure also includes a pair of third bending plates with an overall L-shaped cross-section. The third bending plates are symmetrically arranged at the middle position of the oil-gas separation box in an inclined manner. One end of the third bending plate is welded to the left side plate and the other end is welded to the right side plate. The straight side of one third bending plate is welded to the front side plate, and the straight side of the other third bending plate is welded to the rear side plate. The bending sides of the two third bending plates face downwards, and a gap is formed between them for water vapor to pass through.

2. The oil-gas separator for use in the crankcase of a marine diesel engine as described in claim 1, characterized in that: The intake air intake structure includes an intake steel pipe and an intake flange. The intake flange is welded to the intake end of the intake steel pipe and is connected to the vent of the diesel engine crankcase through the intake flange. The outlet of the intake steel pipe is welded to the separation intake port of the oil-gas separation structure.

3. The oil-gas separator for use in the crankcase of a marine diesel engine as described in claim 1, characterized in that: The exhaust drainage structure includes an exhaust steel pipe and an exhaust flange. The exhaust flange is welded to the exhaust end of the exhaust steel pipe and is connected to the exhaust system inlet through the exhaust flange. The exhaust inlet of the exhaust steel pipe is welded to the separation outlet of the oil-gas separation structure.

4. The oil-gas separator for use in the crankcase of a marine diesel engine as described in claim 1, characterized in that: The lubricating oil recovery structure includes a lubricating oil recovery pipe that is U-shaped in overall. The oil inlet of the lubricating oil recovery pipe is connected to the lubricating oil outlet located at a corner of the lower plate through a vertical lubricating oil recovery pipe. The oil outlet of the lubricating oil recovery pipe is connected to the lubricating oil outlet located on one side of the upper part of the air intake steel pipe through a horizontal lubricating oil recovery pipe.

5. An oil-gas separator for use in the crankcase of a marine diesel engine as described in claim 4, characterized in that: A cleaning hole is provided at the lowest point of the lubricating oil recovery pipe for cleaning when blockage occurs, and a screw plug is provided on the cleaning hole for sealing.

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