Oil-gas separation device of agricultural engine

Abstract

The agricultural engine oil-gas separation device comprises an inner cylinder, an outer cylinder and spiral blades, two sliding grooves are formed in the outer side wall of the inner cylinder, the two sliding grooves spirally surround the outer side wall of the inner cylinder, the spiral directions of the two sliding grooves are the same, and the upper ends and the lower ends of the two sliding grooves are communicated through communicating parts; the spiral conveyor further comprises a scraping plate and a driving part, the scraping plate is arranged in the direction parallel to the radius of the outer barrel, the lower end of the scraping plate abuts against the surface of the spiral blade, one end of the scraping plate is slidably connected into the sliding groove, and the driving part is used for driving the end of the scraping plate to move along the sliding groove. According to the oil-gas separation device of the agricultural engine, liquid on the spiral blade is pushed to flow by arranging the scraper, so that the liquid flows more smoothly, dust and impurities staying on the spiral blade can be scraped off, the situation that the spiral blade is corroded due to long-term scale deposition is reduced to a certain extent, and therefore the service life of the oil-gas separation device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to an oil-gas separation device for an agricultural engine. Background Art

[0002] Agricultural machinery refers to various machines used in the production processes of crop planting and animal husbandry, as well as in the primary processing and treatment of agricultural, forestry and livestock products. Agricultural machinery includes agricultural power machinery, plant protection machinery, crop harvesting machinery, agricultural product processing machinery, animal husbandry machinery and agricultural transport machinery.

[0003] Chainsaws, as small agricultural machines, are often used for pruning foliage in agriculture and forestry due to their easy start-up and flexible operation. They quickly clear dense branches and improve ventilation and light transmission for crops. Small agricultural engines are a crucial component of chainsaws, serving as their primary power source. Professional-grade chainsaw engines typically feature a built-in oil-gas separation module, which separates oil vapor through a crankcase ventilation system to reduce oil consumption and emissions. This is a core component of their environmentally friendly design.

[0004] The vortex oil-gas separator is a dynamic device that uses centrifugal force to achieve efficient oil and gas separation. By passing oil and gas into a barrel equipped with spiral blades, the oil and gas are continuously turned during the flow, thereby forming centrifugal force. The heavier oil droplets collide with the barrel wall along the outside of the oil and gas to form oil droplets and flow along the barrel wall to the lower part of the oil-gas separator. The lighter gas is discharged from the upper part of the oil-gas separator, thereby achieving oil and gas separation.

[0005] However, since chainsaws are often used in environments with high humidity and high dust, the dust generated by the cut and broken branches and leaves or those that fall to the ground in the environment where the chainsaw is used can easily be inhaled by the engine in the chainsaw, causing the engine crankcase to inhale a large amount of dust-containing air when in use, resulting in the high temperature and high pressure environment in the crankcase producing a mixed exhaust gas containing oil particles containing a large amount of dust. Since the oil-gas separator in the current agricultural engine does not have a cleaning structure inside the oil-gas separator, the dust-containing exhaust gas accumulates in the oil-gas separator, blocks it, or corrodes the spiral blades, which can easily cause the oil-gas separator to fail and reduce the service life of the oil-gas separator. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an agricultural engine oil-gas separation device to solve the problem in the prior art that, since chainsaws are often used in high-humidity and high-dust environments, the dust formed by the cut and broken branches and leaves or the dust falling on the ground in the use environment of the chainsaw is easily inhaled by the engine in the chainsaw, causing the engine crankcase to inhale a large amount of dust-containing air when in use, thereby causing the high-temperature and high-pressure environment in the crankcase to produce a mixed exhaust gas containing oil particles containing a large amount of dust. Since the oil-gas separator in the current agricultural engine does not have a cleaning structure inside the oil-gas separator, the dust-containing exhaust gas accumulates in the oil-gas separator and clogs or corrodes the spiral blades, which easily causes the oil-gas separator to fail and reduces the service life of the oil-gas separator.

[0007] The present invention is achieved through the following technical solutions: The exhaust gas fan of the present invention is connected with the exhaust gas fan of the present invention, and the exhaust gas fan of the present invention is connected with the exhaust gas fan of the present invention to the evaporation drying process.

[0008] Furthermore, the driving part includes a fan, a reciprocating screw and an annular magnet. The fan is rotatably connected to the lower end of the inner cylinder. The reciprocating screw is vertically arranged and connected to the rotating shaft of the fan. A connecting rod is provided in the middle of the annular magnet, and the connecting rod is threadedly connected to the reciprocating screw. The outer peripheral wall of the annular magnet abuts against the inner wall of the inner cylinder, and the end of the scraper located in the slide groove is connected to a magnetic block.

[0009] Furthermore, a plurality of baffles are provided on the inner wall of the outer cylinder, and the plurality of baffles are arranged vertically and in a circular array with the axis of the inner cylinder as the center line.

[0010] Furthermore, the flow-facing surface of the deflector is recessed inward to form an arc-shaped surface, and the outer cylinder wall is recessed inward to form a groove. There are multiple grooves, and multiple deflectors are slidably connected to the grooves in a one-to-one correspondence. The grooves match the shape of the deflectors, and the two side walls of the grooves resist the two side surfaces of the deflectors. It also includes a linkage part, which is used to drive the deflector to slide into the groove when the scraper rotates to the corresponding deflector.

[0011] Furthermore, the cross-sections of the baffles and the grooves are concentric arcs of the same radius, and the linkage part includes a gear, a rotating shaft, an arc-shaped tooth portion and a spring. There are multiple rotating shafts, and the multiple rotating shafts are all connected to the upper end of the outer cylinder and are located one-to-one on the axis where the center of a semicircle formed by the cross-sections of the multiple baffles and the grooves is located. There are multiple gears, and the centers of the multiple gears are rotatably connected to the rotating shaft one-to-one. The multiple gears are all connected to push rods, and the ends of the multiple push rods away from the gears are all connected to the upper ends of the multiple baffles one-to-one. The arc-shaped tooth portion is connected to the upper end of the reciprocating screw and meshes with the gear. There are multiple springs, and the multiple springs are all correspondingly sleeved on the outer circumference of the multiple rotating shafts, and the two ends of the springs are respectively connected to the outer cylinder and the corresponding gears.

[0012] Furthermore, the other end of the scraper is connected to a cleaning brush, which is vertically arranged and slidably connected to the other end of the scraper, and the side of the cleaning brush facing the inner wall of the outer cylinder presses against the inner wall of the outer cylinder.

[0013] Furthermore, the other end of the scraper is connected to a cleaning brush, which is vertically arranged and slidably connected to the other end of the scraper, and the side of the cleaning brush facing the inner wall of the outer cylinder presses against the inner wall of the outer cylinder.

[0014] Furthermore, a connecting portion connecting the upper and lower ends of the two chutes is provided with a magnetic block, and the magnetic block has the same magnetic pole as the magnetic block connected to one end of the scraper.

[0015] The beneficial effects of the present invention are: 1. This agricultural engine oil-gas separation device is equipped with a scraper, which is moved periodically along the spiral blade to promote the flow of liquid on the spiral blade, making the liquid flow smoother. At the same time, it can also scrape away dust and impurities remaining on the spiral blade, preventing the blade from being blocked by scale accumulation and affecting the flow of oil and thus affecting the normal use of the oil-gas separator. At the same time, it reduces the corrosion of the spiral blade due to long-term scale accumulation to a certain extent, thereby extending the service life of the oil-gas separation device to a certain extent.

[0016] 2. By setting up the baffle, the impact area between the peripheral oil and gas and the outer cylinder is increased during the flow of oil and gas, so that the oil mist in the oil and gas can stay more on the wall of the outer cylinder, further enhancing the separation efficiency of the oil and gas separation device, so that more oil can be separated and enter the oil tank for recycling during the oil and gas separation process, saving energy to a certain extent.

[0017] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the present invention; Figure 2 It is a longitudinal structural cross-sectional view of the present invention; Figure 3 This is a schematic structural diagram of the present invention after removing the outer cylinder; Figure 4 This is a cross-sectional view of the upper end structure of the outer cylinder of the present invention; Figure 5 For the present invention Figure 4 A partial enlarged view of middle A; Figure 6 It is a structural schematic diagram of the connection between the gear and the baffle of the present invention.

[0019] In the figure: 1. Inner cylinder; 11. Slide groove; 12. Connecting part; 2. Outer cylinder; 21. Baffle; 22. Groove; 23. Gear; 24. Rotating shaft; 25. Arc-shaped tooth portion; 26. Spring; 27. Air inlet; 28. Air outlet; 29. ​​Push rod; 3. Spiral blade; 4. Scraper; 41. Magnetic block; 42. Cleaning brush; 43. Filter plate; 44. Dust collecting part; 5. Driving part; 51. Fan; 52. Reciprocating screw; 53. Ring magnet; 531. Connecting rod. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0021] See also Figure 1-6The present invention provides a technical solution for an oil-gas separation device for an agricultural engine: an oil-gas separation device for an agricultural engine, comprising an inner cylinder 1, an outer cylinder 2 and a spiral blade 3, wherein the inner cylinder 1 and the outer cylinder 2 are coaxially arranged, and the spiral blade 3 is arranged between the inner cylinder 1 and the outer cylinder 2, and an air outlet 28 is provided at the upper end of the outer cylinder 2 and an air inlet 27 is provided on the upper side wall, and the air inlet 27 and the air outlet 28 are separated from each other; the upper and lower ends of the inner cylinder 1 are both open and the upper end is connected to the upper part of the outer cylinder 2; the outer wall of the inner cylinder 1 is provided with a slide groove 11, and there are two slide grooves 11, and both of the two slide grooves 11 spirally surround the inner cylinder 1 outer wall, the two chutes 11 have the same spiral direction and are connected by connecting portions 12 at both upper and lower ends of the two chutes 11; it also includes a scraper 4 and a driving portion 5, the scraper 4 is arranged in a direction parallel to the radius of the outer cylinder 2, and the lower end of the scraper 4 abuts the surface of the spiral blade 3, one end of the scraper 4 is slidably connected to the chute 11, and the driving portion 5 is used to drive the one end of the scraper 4 to move along the chute 11; the lower end of the spiral blade 3 is connected to a filter plate 43 and a dust collecting portion 44, and the positions of the filter plate 43 and the dust collecting portion 44 correspond to the positions of the connecting portions 12 at the lower ends of the two chutes 11.

[0022] When using an agricultural engine oil-gas separation device of the present invention to separate oil and gas, the oil-gas mixture enters between the outer cylinder 2 and the inner cylinder 1 through the inlet at the upper end of the outer cylinder 2 and flows along the spiral blade 3. The liquid part in the oil and gas collides with the inner wall of the outer cylinder 2 due to its own gravity to form oil droplets, which flow along the outside of the spiral blade 3 to the lower end of the inner cylinder 1 and then drip into the lower end of the outer cylinder 2. The gas part flows upward from the lower end of the inner cylinder 1 and is discharged from the upper part, thereby separating the oil and gas.

[0023] In the process of separating oil and gas by an agricultural engine oil-gas separation device of the present invention, the driving part 5 simultaneously drives the scraper 4 to slide along the slide groove 11. Since the lower end of the scraper 4 is against the surface of the spiral blade 3, the scraper 4 can promote the flow of liquid on the spiral blade 3 and scrape off the dust on the spiral blade 3 to make the liquid flow smoother. At the same time, the dust and impurities remaining on the spiral blade 3 can also be scraped off, which reduces the corrosion of the spiral blade 3 due to long-term fouling to a certain extent, thereby increasing the service life of the oil-gas separation device.

[0024] After the scraper 4 scrapes the oil and impurities off the spiral blade 3, the lower end of the spiral blade 3 is connected to a filter plate 43 and a dust collecting section 44, which are positioned corresponding to the positions of the connecting sections 12 at the lower ends of the two chutes 11. The oil and impurities are filtered through the filter plate 43, thereby improving the cleanliness of the oil flowing into the lower end of the outer cylinder 2 and reducing the formation of carbon deposits when the engine circulates the oil. The scraper 4 continues to rotate, scraping the dust and impurities remaining on the filter plate 43 into the dust collecting section 44. The dust is then transferred from one chute 11 to the other through the connecting section 12 between the two chute 11, sliding upward to the upper end of the spiral blade 3. The dust then passes through the connecting section 12 between the two chute 11 at the upper end to clean the spiral blade 3 again. With this structure, the scraper 4 can periodically clean the spiral blade 3.

[0025] In this embodiment, the driving part 5 includes a fan 51, a reciprocating screw 52 and an annular magnet 53. The fan 51 is rotatably connected to the lower end of the inner cylinder 1. The reciprocating screw 52 is vertically arranged and connected to the rotating shaft 24 of the fan 51. A connecting rod 531 is provided in the middle of the annular magnet 53, and the connecting rod 531 is threadedly connected to the reciprocating screw 52. The outer peripheral wall of the annular magnet 53 abuts against the inner wall of the inner cylinder 1, and the end of the scraper 4 located in the slide groove 11 is connected to the magnetic block 41.

[0026] When the separated gas flows upward from the lower end of the inner cylinder 1, the airflow pushes the fan blades to rotate. Since the reciprocating screw 52 is vertically arranged and connected to the rotating shaft 24 of the fan 51, the rotation of the fan blades can drive the reciprocating screw 52 to rotate. Since a connecting rod 531 is provided in the middle of the annular magnet 53, the connecting rod 531 is threadedly connected to the reciprocating screw 52, ​​and the annular magnet 53 can move up and down driven by the rotation of the reciprocating screw 52. Since the outer peripheral wall of the annular magnet 53 abuts against the inner wall of the inner cylinder 1, the end of the scraper 4 located in the slide groove 11 is connected to the magnetic block 41, and the up and down movement of the annular magnet 53 can attract and drive the magnetic block 41 to move up and down. With this structure, the driving part 5 can drive the one end of the scraper 4 to slide along the slide groove 11.

[0027] In this embodiment, a plurality of baffles 21 are provided on the inner wall of the outer cylinder 2 . The baffles 21 are vertically arranged in a circular array with the axis of the inner cylinder 1 as the center line.

[0028] When the oil and gas flow along the spiral blade 3, the oil mist on the outside of the oil and gas collides with the deflector 21 due to inertia and stays on the deflector 21 to form oil droplets. After the oil droplets gather to a certain extent, they flow downward along the deflector 21 to the spiral blade 3. The oil then flows downward along the spiral blade 3 under the push of the scraper 4 until it flows into the bottom of the outer cylinder 2. With this structure, the oil and gas can collide with the outer cylinder 2 more often, so that more oil mist can stay on the wall of the outer cylinder 2 in liquid form, further enhancing the separation efficiency of the oil and gas separation device, so that more oil can be separated and enter the oil tank for recycling during the oil and gas separation process, saving energy to a certain extent.

[0029] In this embodiment, the facing surface of the baffle 21 is recessed inward to form an arc-shaped surface, and the side of the baffle 21 that receives the impact of oil and gas is the facing surface of the baffle 21. The wall of the outer cylinder 2 is recessed inward to form a groove 22. The groove 22 is multiple and multiple baffles 21 are slidably connected to the groove 22 in a one-to-one correspondence. The groove 22 matches the shape of the baffle 21, and the two side walls of the groove 22 resist the two side surfaces of the baffle 21; it also includes a linkage part, which is used to drive the baffle 21 to slide into the groove 22 when the scraper 4 rotates to the corresponding baffle 21.

[0030] When the scraper 4 rotates to the position corresponding to the deflector 21, the linkage part pushes the deflector 21 to slide into the groove 22, so that the deflector 21 will not resist the rotation of the scraper 4. At the same time, since the two side walls of the groove 22 press against the two side surfaces of the deflector 21, the side walls of the groove 22 can scrape off the oil droplets and dust gathered on the two side surfaces of the deflector 21, so that the oil can gather into oil droplets faster and flow downward with the scraping of the scraper 4 into the bottom of the outer cylinder 2.

[0031] In this embodiment: the cross-sections of the baffle 21 and the groove 22 are concentric arcs of the same radius, and the linkage part includes a gear 23, a rotating shaft 24, an arc-shaped tooth portion 25 and a spring 26. There are multiple rotating shafts 24, and multiple rotating shafts 24 are all connected to the upper end of the outer cylinder 2 and are located one-to-one on the axis where the center of a semicircle formed by the cross-sections of multiple baffles 21 and the groove 22 is located. There are multiple gears 23 and the centers of multiple gears 23 are rotatably connected to the rotating shaft 24. Multiple gears 23 are connected to a push rod 29, and the ends of multiple push rods 29 away from the gear 23 are all connected to the upper ends of multiple baffles 21 in a one-to-one manner. The arc-shaped tooth portion 25 is connected to the upper end of the reciprocating screw 52 and meshes with the gear 23. There are multiple springs 26, and multiple springs 26 are all correspondingly sleeved on the outer circumference of multiple rotating shafts 24, and the two ends of the spring 26 are respectively connected to the outer cylinder 2 and the corresponding gear 23.

[0032] In this embodiment, the other end of the scraper 4 is connected to a cleaning brush 42 , which is vertically arranged and slidably connected to the other end of the scraper 4 . The cleaning brush 42 is pressed against the inner wall of the outer tube 2 on the side facing the inner wall of the outer tube 2 .

[0033] With this structure, when the scraper 4 rotates, it also drives the cleaning brush 42 to move along the inner wall of the outer cylinder 2 to clean the inner wall of the outer cylinder 2, further accelerating the condensation of the oil mist attached to the inner wall of the outer cylinder 2 into oil droplets, and at the same time cleaning the inner wall of the outer cylinder 2, to a certain extent reducing the possibility of impurities adhering to the inner wall of the outer cylinder 2 and accumulating dirt, causing corrosion of the inner wall of the outer cylinder 2, thereby affecting the oil and gas separation efficiency of the oil and gas separation device.

[0034] In this embodiment, a magnetic block is provided at the connecting portion 12 connecting the upper and lower ends of the two chutes 11 . The magnetic block has the same magnetic pole as the magnetic block 41 connected to one end of the scraper 4 .

[0035] When the scraper 4 rotates to the upper or lower end of the chute 11 and needs to move to another chute 11, the push of the magnetic block can make the magnetic block 41 connected to one end of the scraper 4 pass the corner position more easily, thereby reducing the possibility of the scraper 4 being stuck when moving from one chute 11 to another chute 11 to a certain extent.

[0036] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An agricultural engine oil-gas separation device, comprising an inner cylinder, an outer cylinder, and a spiral blade, the inner cylinder and the outer cylinder being coaxially arranged, the spiral blade being disposed between the inner cylinder and the outer cylinder, the outer cylinder having an air outlet at its upper end and an air inlet at its upper sidewall, the air inlet and the air outlet being isolated from each other; the inner cylinder having openings at both upper and lower ends, and the upper end being connected to the upper portion of the outer cylinder; characterized in that: The outer wall of the inner cylinder is provided with a slide groove, and there are two slide grooves, and both slide grooves are spirally wrapped around the outer wall of the inner cylinder, the spiral directions of the two slide grooves are the same, and the upper and lower ends of the two slide grooves are connected by connecting parts; it also includes a scraper and a driving part, the scraper is arranged in a direction parallel to the radius of the outer cylinder and the lower end of the scraper abuts the surface of the spiral blade, one end of the scraper is slidably connected to the slide groove, and the driving part is used to drive the one end of the scraper to move along the slide groove; the lower end of the spiral blade is connected to a filter plate and a dust collecting part, and the positions of the filter plate and the dust collecting part correspond to the positions of the connecting parts at the lower ends of the two slide grooves.

2. The oil-gas separation device for an agricultural engine according to claim 1, characterized in that: The driving part includes a fan, a reciprocating screw and an annular magnet. The fan is rotatably connected to the lower end of the inner cylinder. The reciprocating screw is vertically arranged and connected to the rotating shaft of the fan. A connecting rod is provided in the middle of the annular magnet, and the connecting rod is threadedly connected to the reciprocating screw. The outer peripheral wall of the annular magnet abuts against the inner wall of the inner cylinder, and the end of the scraper located in the slide groove is connected to a magnetic block.

3. The oil-gas separation device for an agricultural engine according to claim 2, characterized in that: The inner wall of the outer cylinder is provided with a plurality of baffles, which are arranged vertically and arranged in a circular array with the axis of the inner cylinder as the center line.

4. The oil-gas separation device for an agricultural engine according to claim 3, characterized in that: The flow-facing surface of the deflector is concave inward to form an arc-shaped surface, and the outer cylinder wall is concave inward to form a groove. There are multiple grooves, and multiple deflectors are slidably connected to the grooves in a one-to-one manner. The grooves match the shape of the deflectors, and the two side walls of the grooves resist the two side surfaces of the deflectors; it also includes a linkage part, which is used to drive the deflector to slide into the groove when the scraper rotates to the corresponding deflector.

5. The oil-gas separation device for an agricultural engine according to claim 4, characterized in that: The cross-sections of the baffle and the groove are concentric arcs of the same radius, and the linkage part includes a gear, a rotating shaft, an arc-shaped tooth portion and a spring. There are multiple rotating shafts, and the multiple rotating shafts are all connected to the upper end of the outer cylinder and are located one-to-one on the axis where the center of a semicircle formed by the cross-sections of the multiple baffles and the grooves is located. There are multiple gears, and the centers of the multiple gears are rotatably connected to the rotating shaft one-to-one. The multiple gears are all connected to push rods, and the ends of the multiple push rods away from the gears are all connected to the upper ends of the multiple baffles one-to-one. The arc-shaped tooth portion is connected to the upper end of the reciprocating screw and meshes with the gear. There are multiple springs, and the multiple springs are all correspondingly sleeved on the outer circumference of the multiple rotating shafts, and the two ends of the springs are respectively connected to the outer cylinder and the corresponding gears.

6. The oil-gas separation device for an agricultural engine according to claim 5, characterized in that: The other end of the scraper is connected with a cleaning brush, which is vertically arranged and slidably connected to the other end of the scraper, and the side of the cleaning brush facing the inner wall of the outer cylinder is against the inner wall of the outer cylinder.

7. The oil-gas separation device for an agricultural engine according to claim 6, characterized in that: The other end of the scraper is connected with a cleaning brush, which is vertically arranged and slidably connected to the other end of the scraper, and the side of the cleaning brush facing the inner wall of the outer cylinder is against the inner wall of the outer cylinder.

8. The oil-gas separation device for an agricultural engine according to claim 7, characterized in that: A magnetic block is provided at a connecting portion connecting the upper and lower ends of the two chutes, and the magnetic block has the same magnetic pole as the magnetic block connected to one end of the scraper.

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