Valve plate type breather structure of double-cylinder v-type air-cooled diesel engine and oil-gas separation method

Abstract

The present application belongs to diesel engine technical field, and disclose a kind of double cylinder V type air-cooled diesel engine valve piece type breather structure and oil-gas separation method, including cylinder cover, the inside of the cylinder cover is equipped with breathing hole, the inside of the breathing hole is fixedly connected with blind head, the top of the cylinder cover is fixedly connected with the fixed sleeve that is communicated with breathing hole, further include: from switching anti-blocking breather.The present application carries out double-layer barrier filtration to oil-gas by concave cavity and filter cartridge, improves oil-gas separation effect, reduces diesel engine oil consumption and exhaust particulate emission, and alternating compression member can drive arc plate to alternately compress the two ends of double-end elastic sheet, to realize the alternating on-off work of two filter cartridges;When single filter cartridge performs filtration operation, the other filter cartridge is in static offline state, and the oil adhered in its interior can fully slide back and flow, reduce oil consumption, improve the stability and durability of breather full operating condition.

Description

Technical Field

[0001] This invention belongs to the field of diesel engine technology, specifically a valve plate breather structure and oil-gas separation method for a twin-cylinder V-type air-cooled diesel engine. Background Technology

[0002] In recent years, with the development of the diesel engine industry, aluminum alloy twin-cylinder V-type air-cooled diesel engines have been widely used in generator sets, agricultural machinery, construction machinery, fire emergency equipment and other industries due to their advantages of small size, light weight, compact structure and low cost. In particular, aluminum alloy twin-cylinder V-type air-cooled diesel engines with power in the range of 14 to 25 kW have gradually become the dominant products in the market.

[0003] Due to the small crankcase volume and the 45° V-shaped arrangement of the two cylinders, the total displacement of the twin-cylinder V-type air-cooled diesel engine is relatively large, which can easily lead to high crankcase pressure. Therefore, breather holes connected to the cylinder head intake manifold are usually provided on the cylinder head covers of the left and right cylinders to relieve the pressure in the crankcase through the negative pressure generated by the intake valves. However, the existing twin-cylinder V-type air-cooled diesel engines only have a simple labyrinth structure near the breather holes inside the cylinder head covers, with a small number of steel wool balls placed inside as oil-gas separators. The oil-gas separation effect of this structure is poor. It can only block a small amount of oil mist outside the breather holes and return to the crankcase through the openings on the side walls of the labyrinth. Most of the oil mist is still drawn into the cylinder through the breather holes and burned, which not only causes some economic losses, but also does not help reduce particulate PM emissions in diesel engine exhaust. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine, including a cylinder head cover, a breather hole inside the cylinder head cover, a plug fixedly connected inside the breather hole, and a fixing sleeve communicating with the breather hole fixedly connected to the top of the cylinder head cover, and further comprising: The self-switching anti-clogging breather is located inside the cylinder head cover to improve the oil-gas separation effect; The self-switching anti-clogging breather includes a concave cavity inside the cylinder head cover. A cover plate seat is fixedly installed inside the cylinder head cover by bolts. The top of the cover plate seat extends into the concave cavity. A valve plate seat is provided inside the cylinder head cover. Two filter cartridges are provided inside the cover plate seat. Two limiting rings are fixedly connected to the bottom of the valve plate seat and the inside of the cover plate seat. The limiting rings are sleeved on the filter cartridges. A one-way vent is provided at the top of the valve plate seat. An alternating pressing element is provided inside the fixing sleeve. An oil drain hole is provided on one side of the cover plate seat. The anti-clogging cleaning component is located inside the cover plate seat and is used to automatically clean and prevent clogging of the filter cartridge surface.

[0005] In the above technical solution, preferably, the alternating clamping component includes a double-hole sleeve fixedly installed inside the valve plate seat by bolts, and a double-ended elastic plate is fixedly connected to the double-hole sleeve by rivets. The bottom of the double-ended elastic plate is in contact with the top of the double-hole sleeve. An exhaust hole is opened at the bottom of the valve plate seat. A retaining sleeve is fixedly connected inside the cylinder head cover, and the inner wall of the retaining sleeve is in contact with the surface of the valve plate seat.

[0006] In the above technical solution, preferably, two concave rods are symmetrically fixedly connected to the double-hole sleeve. The concave rods are located at the top of the double-end elastic plates. The bottom of the filter cylinder is in contact with the bottom of the inner wall of the cover plate seat, and the top of the filter cylinder is in contact with the bottom of the valve plate seat.

[0007] In the above technical solution, preferably, the alternating clamping component includes a worm gear rod movably connected to the inside of the fixed sleeve via a bearing. Two eccentric wheels are fixedly connected to the worm gear rod, and a sliding sleeve is fitted on the eccentric wheels. An arc-shaped plate is fixedly connected to the bottom of the sliding sleeve. Four guide rods are vertically fixedly connected to the top of the inner wall of the fixed sleeve. Two guide sleeves are symmetrically fixedly connected to the sliding sleeve, and the guide sleeves are fitted on the guide rods. A transmission component connected to the worm gear rod is provided at the top of the fixed sleeve.

[0008] In the above technical solution, preferably, the transmission component includes a motor disposed on the top of the fixed sleeve, two support plates are fixedly connected to the motor, the support plates are fixedly installed on the fixed sleeve by bolts, a magnetic coupling disk one is fixedly connected to the output end of the motor, a worm gear meshing with a worm wheel is movably connected inside the valve plate seat through a bearing, a magnetic coupling disk two that cooperates with the magnetic coupling disk one is fixedly connected to the top of the worm gear, and a time control switch is fixedly connected to the fixed sleeve.

[0009] In the above technical solution, preferably, a circular groove is provided at the top of the inner wall of the fixed sleeve, the top of the magnetic coupling disk II extends into the interior of the circular groove, a buffer pad is fixedly connected to the bottom of the arc plate, and the bottom of the buffer pad contacts the top of the double-ended elastic sheet.

[0010] In the above technical solution, preferably, the anti-clogging cleaning component includes a gear fixedly connected to the worm gear, a ring movably connected to the limiting ring via a bearing, four scrapers vertically fixedly connected to the inner side of the ring, and toothed rings meshing on both sides of the gear, the toothed rings being fixedly connected to the ring.

[0011] In the above technical solution, preferably, the bottom of the worm gear is provided with a driven unblocking component, the driven unblocking component includes a commutator fixedly connected to the bottom of the worm gear, the output end of the commutator is fixedly connected to a rotating rod located inside the oil drain hole, and two inclined plates located inside the oil drain hole are fixedly connected to the rotating rod through a connecting rod.

[0012] In the above technical solution, preferably, a sealing ring is provided at the bottom of the retaining sleeve, the bottom of the sealing ring is in contact with the top of the valve plate seat, the bottom of the commutator is fixedly connected to the inside of the cover plate seat, a sleeve plate is fixedly connected to the inside of the cover plate seat, and the sleeve plate is sleeved on the rotating rod.

[0013] A method for oil-gas separation using a valve plate breather structure for a dual-cylinder V-type air-cooled diesel engine, comprising the aforementioned dual-cylinder V-type air-cooled diesel engine valve plate breather structure, and further comprising the following steps: S1: The oil and gas in the external crankcase rise into the concave cavity of the cylinder head cover. The concave cavity intercepts the large oil droplets of the oil mist through the cover plate seat, completing the initial filtration and separation of oil and gas. After the gas passes through the filter cartridge, the oil droplets in the oil mist are intercepted and attached by the pores of the filter cartridge, completing the fine filtration and separation of oil and gas.

[0014] S2: The filtered gas rises through the exhaust hole at the bottom of the valve seat and enters the inner cavity of the double-hole sleeve. When a negative pressure is generated inside the breather hole, the pressure difference pushes the double-end elastic plate to deform upward and open. The clean gas flows out through the double-hole sleeve and then flows into the breather hole. After the negative pressure disappears, the double-end elastic plate returns to its original position and fits against the top surface of the double-hole sleeve, blocking the reverse flow of air.

[0015] S3: Oil droplets condensed on the outer wall of the filter cartridge slide down under the influence of gravity, gather at the bottom of the inner cavity of the cover plate seat, and flow back to the crankcase through the oil drain hole to complete the oil recovery.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses a concave cavity and a filter cartridge to perform double-layer blocking filtration of oil and gas, improving the oil-gas separation effect, reducing diesel engine oil consumption and exhaust particulate matter emissions. The alternating clamping component can drive the arc plate to alternately clamp the two ends of the double-ended elastic sheet, realizing the alternating on and off operation of the two filter cartridges. When one filter cartridge is performing filtration, the other filter cartridge is in a static offline state, and the oil attached to its interior can fully slide off and flow back, preventing the filter cartridge from becoming clogged and causing poor oil-gas separation effect, reducing oil consumption, and improving the stability and durability of the breather under all working conditions.

[0017] Furthermore, relying solely on static placement to allow oil to slide off the filter cartridge is insufficient to remove stubborn sludge and carbon deposits from its surface. Long-term operation still leads to pore blockage, resulting in a continuous decline in oil-gas separation efficiency. However, by incorporating gears, rings, and scrapers in the anti-clogging cleaning components, the worm gear rotates synchronously with the gears, which in turn drive the rings to rotate along the limiting ring. The four scrapers inside the rings rotate simultaneously, scraping the oil from the filter cartridge surface and removing stubborn oil buildup. The scrapers and filter cartridge are fitted with a clearance, preventing contact wear caused by diesel engine vibration and rotation. This effectively slows down the clogging rate of the filter cartridge without shortening its lifespan, ensuring long-term stable oil-gas separation performance.

[0018] Furthermore, sludge and carbon particles easily accumulate in the drain hole, which can lead to blockage during long-term operation, resulting in poor oil return and affecting the oil-gas separation effect and crankcase pressure stability. However, through the structural design of the commutator, rotating rod, and inclined plate in the driven unblocking component, the worm gear rotates synchronously to drive the commutator, and the output end of the commutator drives the rotating rod to rotate inside the drain hole. The rotating rod drives the two inclined plates to rotate synchronously, continuously pushing out the oil and deposits in the drain hole, preventing sludge and carbon particles from clogging the drain hole. The inclined plate and the drain hole are fitted with a clearance fit, which can maintain the smooth oil return path for a long time and improve operational reliability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the fixing sleeve of the present invention; Figure 3 This is a cross-sectional schematic diagram of the cover plate seat of the present invention; Figure 4 This is a schematic diagram of the valve plate seat of the present invention; Figure 5 This is a schematic diagram of the worm gear of the present invention; Figure 6 This is a cross-sectional schematic diagram of the double-hole sleeve of the present invention; Figure 7 This is a schematic diagram of the eccentric wheel of the present invention; Figure 8 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Cylinder head cover; 2. Breathing port; 3. End cap; 4. Fixing sleeve; 5. Self-switching anti-clogging breather; 51. Concave cavity; 52. Cover plate seat; 53. Valve plate seat; 54. Filter cartridge; 55. Limiting ring; 56. One-way ventilation component; 561. Double-hole sleeve; 562. Double-end elastic plate; 563. Exhaust port; 564. Baffle sleeve; 57. Alternating clamping component; 571. Worm gear; 572. Eccentric wheel; 573. Sliding sleeve; 574. Arc plate; 575. Guide rod; 576. Guide sleeve 577. Transmission component; 5771. Motor; 5772. Support plate; 5773. Magnetic coupling disc one; 5774. Worm gear; 5775. Magnetic coupling disc two; 5776. Time control switch; 58. Oil drain hole; 6. Anti-clogging cleaning component; 61. Gear; 62. Ring; 63. Scraper; 64. Gear ring; 7. Concave rod; 8. Circular groove; 9. Buffer pad; 10. Driven unblocking component; 101. Commutator; 102. Rotating rod; 103. Inclined plate; 11. Sealing ring; 12. Sleeve plate. Detailed Implementation

[0021] 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.

[0022] Example 1: As Figures 1 to 4 As shown, this invention provides a valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine, including a cylinder head cover 1, a breather hole 2 inside the cylinder head cover 1, a plug 3 fixedly connected inside the breather hole 2, and a fixing sleeve 4 communicating with the breather hole 2 fixedly connected to the top of the cylinder head cover 1. The invention is characterized by further comprising: The self-switching anti-blockage breather 5 is located inside the cylinder head cover 1 to improve the oil-gas separation effect; The self-switching anti-clogging breather 5 includes a concave cavity 51 inside the cylinder head cover 1. A cover plate seat 52 is fixedly installed inside the cylinder head cover 1 by bolts. The top of the cover plate seat 52 extends into the concave cavity 51. A valve plate seat 53 is provided inside the cylinder head cover 1. Two filter cartridges 54 are provided inside the cover plate seat 52. Two limiting rings 55 are fixedly connected to the bottom of the valve plate seat 53 and the inside of the cover plate seat 52. The limiting rings 55 are sleeved on the filter cartridges 54. A one-way vent 56 is provided at the top of the valve plate seat 53. An alternating clamping member 57 is provided inside the fixing sleeve 4. An oil drain hole 58 is provided on one side of the cover plate seat 52. The anti-clogging cleaning component 6 is located inside the cover plate seat 52 and is used to automatically clean and prevent clogging of the surface of the filter cartridge 54.

[0023] Specifically, the bottom of the breather hole 2 is connected to the cylinder head intake passage; after the oil and gas enter the concave cavity 51, the concave cavity 51 and the cover plate seat 52 block the oil particles in the oil and gas, first completing the initial sedimentation, and then passing through the filter cartridge 54 for fine filtration, forming a double-layer barrier filtration structure, which effectively improves the oil and gas separation efficiency. The alternating clamping part 57 can control the two filter cartridges 54 to work alternately. When one filter cartridge 54 is performing filtration, the other filter cartridge 54 is in a static offline state, and the oil attached inside can fully slide back, avoiding the continuous accumulation of oil stains and clogging of the filter cartridge 54 pores. At the same time, it can stably maintain the crankcase pressure balance, reduce oil consumption and exhaust particulate matter emissions; the filter cartridge 54 is a copper sintered oil and gas filter element.

[0024] like Figures 4 to 6 As shown, the alternating clamping member 57 includes a double-hole sleeve 561 that is fixedly installed inside the valve plate seat 53 by bolts. A double-ended elastic piece 562 is fixedly connected to the double-hole sleeve 561 by rivets. The bottom of the double-ended elastic piece 562 is in contact with the top of the double-hole sleeve 561. An exhaust hole 563 is provided at the bottom of the valve plate seat 53. A retaining sleeve 564 is fixedly connected inside the cylinder head cover 1. The inner wall of the retaining sleeve 564 is in contact with the surface of the valve plate seat 53.

[0025] Specifically, the double-ended elastic sheet 562 is attached to the top surface of the double-hole sleeve 561. The filtered gas pushes the double-ended elastic sheet 562 upward through the exhaust hole 563 to open, realizing unidirectional exhaust. After the negative pressure disappears, the double-ended elastic sheet 562 automatically resets and closes, blocking the reverse flow of air. The retaining sleeve 564 is sleeved on the outside of the valve seat 53, which can form a precise radial limit on the valve seat 53, ensuring that all airflow is filtered. The structure is simple and reliable. The valve seat 53 is squeezed and fixed by the cover plate seat 52 and the filter cylinder 54, which is convenient for assembly.

[0026] like Figures 2 to 4 As shown, two concave rods 7 are symmetrically fixedly connected to the double-hole sleeve 561. The concave rods 7 are located at the top of the double-end elastic sheet 562. The bottom of the filter cylinder 54 is in contact with the bottom of the inner wall of the cover plate seat 52, and the top of the filter cylinder 54 is in contact with the bottom of the valve plate seat 53.

[0027] Specifically, the concave rod 7 is symmetrically arranged on the top of the double-hole sleeve 561, which can limit the maximum upward deformation of the double-end elastic sheet 562, prevent the double-end elastic sheet 562 from being over-bent and failing due to excessive negative pressure, and ensure the stability of the one-way ventilation function.

[0028] like Figures 2 to 4As shown, the alternating clamping component 57 includes a worm gear 571 movably connected to the inside of the fixed sleeve 4 via a bearing. Two eccentric wheels 572 are fixedly connected to the worm gear 571. A sliding sleeve 573 is fitted on the eccentric wheels 572. An arc-shaped plate 574 is fixedly connected to the bottom of the sliding sleeve 573. Four guide rods 575 are vertically fixedly connected to the top of the inner wall of the fixed sleeve 4. Two guide sleeves 576 are symmetrically fixedly connected to the sliding sleeve 573. The guide sleeves 576 are fitted on the guide rods 575. A transmission component 577 connected to the worm gear 571 is provided at the top of the fixed sleeve 4.

[0029] Specifically, when the worm gear 571 rotates, it drives two eccentric wheels 572 to rotate synchronously. One eccentric wheel 572 pushes one sliding sleeve 573 upward, while the other eccentric wheel 572 pushes the other sliding sleeve 573 downward. The guide sleeve 576 slides along the guide rod 575 to limit the direction of movement, ensuring that the sliding sleeve 573 drives the arc plate 574 to press down smoothly and vertically, accurately pressing the corresponding ends of the double-ended elastic plates 562. The rotation of the worm gear 571 can alternately drive the arc plates 574 on both sides to press down, realizing the switching of the two filter cylinders 54. The action transmission is smooth and the pressing position is accurate, which can ensure the sealing performance and smooth opening of the double-ended elastic plates 562.

[0030] like Figures 1 to 3 As shown, the transmission component 577 includes a motor 5771 mounted on the top of the fixed sleeve 4. Two support plates 5772 are fixedly connected to the motor 5771. The support plates 5772 are fixedly mounted on the fixed sleeve 4 by bolts. A magnetic coupling disk 5773 is fixedly connected to the output end of the motor 5771. A worm 5774 that meshes with the worm gear 571 is movably connected to the inside of the valve plate seat 53 through a bearing. A magnetic coupling disk 5775 that works with the magnetic coupling disk 5773 is fixedly connected to the top of the worm 5774. A time switch 5776 is fixedly connected to the fixed sleeve 4.

[0031] Specifically, the time control switch 5776 is a microcomputer time control switch 5776, and both magnetic coupling disk one 5773 and magnetic coupling disk two 5775 are high-temperature resistant magnetic coupling disks. Magnetic coupling disk one 5773 and magnetic coupling disk two 5775 form a magnetic coupling structure, which can transmit torque through the fixed sleeve 4 in a non-contact magnetic manner. There is no need to open a drive shaft through hole in the housing, nor is there a need for matching dynamic sealing components, thus avoiding the risk of seal wear and oil and gas leakage. The motor 5771 drives the worm 5774 and worm wheel 571 to rotate through magnetic non-contact transmission via magnetic coupling disk one 5773 and magnetic coupling disk two 5775. The time control switch 5776 can control the start and stop of the motor 5771 at timed intervals and complete the switching of filter cartridge 54 according to the set cycle, adapting to the anti-clogging requirements under different working conditions.

[0032] like Figure 4 and Figure 7As shown, a circular groove 8 is provided on the top of the inner wall of the fixed sleeve 4, the top of the magnetic coupling disk 5775 extends into the interior of the circular groove 8, and a buffer pad 9 is fixedly connected to the bottom of the arc plate 574. The bottom of the buffer pad 9 is in contact with the top of the double-ended elastic sheet 562.

[0033] Specifically, the circular groove 8 can accommodate the upper end of the second magnetic coupling disk 5775, optimizing the internal installation space layout, while ensuring the coaxiality of the first magnetic coupling disk 5773 and the second magnetic coupling disk 5775, thus improving the stability of the magnetic transmission; the buffer pad 9 is made of high-temperature resistant rubber material. When the arc plate 574 is pressed down, the buffer pad 9 can buffer the hard contact impact between the arc plate 574 and the double-end elastic sheet 562, reduce switching noise, avoid damage to the surface of the double-end elastic sheet 562, and effectively extend the service life of the double-end elastic sheet 562.

[0034] like Figures 3 to 5 As shown, the anti-clogging cleaning component 6 includes a gear 61 fixedly connected to the worm gear 571, a ring 62 movably connected to the limiting ring 55 via a bearing, four scrapers 63 vertically fixedly connected to the inner side of the ring 62, and toothed rings 64 meshing on both sides of the gear 61, with the toothed rings 64 fixedly connected to the ring 62.

[0035] Specifically, when the worm gear 571 rotates, it synchronously drives the gear 61 to rotate. Through the meshing of the gear ring 64, the ring 62 is driven to rotate along the limiting ring 55. The four scrapers 63 on the inner side of the ring 62 rotate together to scrape the oil off the surface of the filter cartridge 54, removing stubborn oil deposits. The scrapers 63 and the filter cartridge 54 are fitted with a clearance, so there will be no contact wear due to the vibration and rotation of the diesel engine. Without shortening the service life of the filter cartridge 54, the clogging rate of the filter cartridge 54 is effectively slowed down, ensuring the long-term stability of the oil-gas separation effect.

[0036] like Figures 3 to 5 As shown, a driven unblocking component 10 is provided at the bottom of the worm gear 571. The driven unblocking component 10 includes a commutator 101 fixedly connected to the bottom of the worm gear 571. The output end of the commutator 101 is fixedly connected to a rotating rod 102 located inside the oil drain hole 58. Two inclined plates 103 located inside the oil drain hole 58 are fixedly connected to the rotating rod 102 via a connecting rod.

[0037] Specifically, the commutator 101 is a bevel gear commutator; the worm gear 571 rotates synchronously to drive the commutator 101 to operate, and the output end of the commutator 101 drives the rotating rod 102 to rotate inside the oil drain hole 58. The rotating rod 102 drives the two inclined plates 103 to rotate synchronously, continuously pushing out the oil and deposits in the oil drain hole 58, avoiding the accumulation of sludge and carbon particles that clog the oil drain hole 58. The inclined plate 103 and the oil drain hole 58 are fitted with a clearance fit, which can maintain the smooth flow of oil return path for a long time and improve the reliability of operation.

[0038] like Figure 3 and Figure 8 As shown, a sealing ring 11 is provided at the bottom of the retaining sleeve 564. The bottom of the sealing ring 11 contacts the top of the valve plate seat 53. The bottom of the commutator 101 is fixedly connected to the inside of the cover plate seat 52. A sleeve plate 12 is fixedly connected to the inside of the cover plate seat 52. The sleeve plate 12 is sleeved on the rotating rod 102.

[0039] Specifically, the sealing ring 11 is set between the mating surfaces of the retaining sleeve 564 and the valve plate seat 53, which can fill the assembly gap, enhance the sealing performance, prevent unfiltered oil and gas from entering the exhaust side from the mating gap, and ensure the effectiveness of oil and gas separation; the sleeve plate 12 can form radial support and limit the rotating rod 102, avoid the rotating rod 102 from shaking and swaying when rotating, and ensure the smooth operation of the inclined plate 103.

[0040] Working principle and usage process of this invention: During operation, the diesel engine runs, and the oil vapor in the crankcase rises into the concave cavity 51 of the cylinder head cover 1. The airflow slows down in the concave cavity 51, and large oil droplets settle due to gravity and slide down along the cover plate seat 52, completing the initial filtration. Subsequently, the oil vapor enters the inner cavity of the cover plate seat 52 and passes through the filter cartridge 54 in the conduction position. The fine oil droplets in the oil mist are intercepted by the pores of the filter cartridge 54, completing the fine filtration and separation. The filtered clean gas enters the inner cavity of the double-hole sleeve 561 through the exhaust hole 563 at the bottom of the valve plate seat 53. When the breather hole 2 side generates negative pressure due to air intake, the pressure difference pushes the double-end elastic plate 562 to deform upward and open, and the clean gas flows into the breather hole 2 and is discharged. After the negative pressure disappears, the double-end elastic plate 562 returns to its original position and adheres to the top surface of the double-hole sleeve 561, blocking the reverse flow of airflow. The time control switch 5776 starts the motor 5771 according to the set cycle. The output end of the motor 5771 drives the magnetic coupling disk 1 5773 to rotate. Through magnetic coupling, the magnetic coupling disk 2 5775 inside the fixed sleeve 4 rotates synchronously, which in turn drives the worm 5774 to rotate. The worm 5774 drives the two eccentric wheels 572 to rotate synchronously through the worm wheel 571. The eccentric wheels 572 push the corresponding arc plate 574 and the buffer pad 9 to press one end of the double-ended elastic plate 562. The double-ended elastic plate 562 blocks the exhaust hole 563 on one side of the top of the double-hole sleeve 561, realizing the alternating on and off switching of the two filter cartridges 54. When one filter cartridge 54 is performing filtration, the other filter cartridge 54 is in a static state, and the oil attached to its inner wall slides off fully due to gravity.

[0041] While the worm gear 571 rotates to perform the switching, it simultaneously drives the gear 61 on its surface to rotate. The gear 61 drives the two rings 62 to rotate circumferentially along the corresponding limit rings 55 through meshing with the gear rings 64 on both sides. The four scrapers 63 fixed vertically inside the rings 62 rotate together to scrape the oil on the outer surface of the filter cartridge 54, removing the stubborn oil stains adhering to the surface, thereby achieving the effect of self-switching anti-clogging filtration.

[0042] Example 2: A method for oil-gas separation using a valve plate breather structure for a dual-cylinder V-type air-cooled diesel engine, comprising the aforementioned dual-cylinder V-type air-cooled diesel engine valve plate breather structure, and further comprising the following steps: S1: The oil and gas in the external crankcase rises and enters the concave cavity 51 of the cylinder head cover 1. The concave cavity 51 intercepts the large oil droplets of the oil mist through the cover plate seat 52, completing the initial filtration and separation of oil and gas. After the gas passes through the filter cartridge 54, the oil droplets in the oil mist are intercepted and attached by the pores of the filter cartridge 54, completing the fine filtration and separation of oil and gas.

[0043] S2: The filtered gas rises through the exhaust hole 563 at the bottom of the valve seat 53 and enters the inner cavity of the double-hole sleeve 561. When a negative pressure is generated inside the breath hole 2, the pressure difference pushes the double-end elastic plate 562 to deform upward and open. The clean gas flows out through the double-hole sleeve 561 and then flows into the breath hole 2. After the negative pressure disappears, the double-end elastic plate 562 returns to its original position and fits against the top surface of the double-hole sleeve 561, blocking the reverse flow of air.

[0044] S3: The oil droplets condensed on the outer wall of the filter cartridge 54 slide down under the action of gravity, gather at the bottom of the inner cavity of the cover plate seat 52, and flow back to the inside of the crankcase through the oil drain hole 58 to complete the oil recovery.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] 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 valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine, comprising a cylinder head cover (1), wherein a breather hole (2) is provided inside the cylinder head cover (1), a plug (3) is fixedly connected inside the breather hole (2), and a fixing sleeve (4) communicating with the breather hole (2) is fixedly connected to the top of the cylinder head cover (1), characterized in that, Also includes: The self-switching anti-blockage breather (5) is installed inside the cylinder head cover (1) to improve the oil-gas separation effect; The self-switching anti-blockage breather (5) includes a concave cavity (51) inside the cylinder head cover (1). A cover plate seat (52) is fixedly installed inside the cylinder head cover (1) by bolts. The top of the cover plate seat (52) extends into the concave cavity (51). A valve plate seat (53) is provided inside the cylinder head cover (1). Two filter cartridges (54) are provided inside the cover plate seat (52). Two limiting rings (55) are fixedly connected to the bottom of the valve plate seat (53) and the inside of the cover plate seat (52). The limiting rings (55) are sleeved on the filter cartridges (54). A one-way ventilation component (56) is provided at the top of the valve plate seat (53). An alternating pressing component (57) is provided inside the fixing sleeve (4). An oil drain hole (58) is opened on one side of the cover plate seat (52). The anti-clogging cleaning component (6) is located inside the cover plate seat (52) and is used to automatically clean and prevent clogging of the surface of the filter cartridge (54).

2. The valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine according to claim 1, characterized in that: The alternating clamping member (57) includes a double-hole sleeve (561) fixedly installed inside the valve plate seat (53) by bolts. A double-ended elastic plate (562) is fixedly connected to the double-hole sleeve (561) by rivets. The bottom of the double-ended elastic plate (562) is in contact with the top of the double-hole sleeve (561). An exhaust hole (563) is opened at the bottom of the valve plate seat (53). A retainer (564) is fixedly connected inside the cylinder head cover (1). The inner wall of the retainer (564) is in contact with the surface of the valve plate seat (53).

3. The valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine according to claim 2, characterized in that: Two concave rods (7) are symmetrically fixedly connected to the double-hole sleeve (561). The concave rods (7) are located at the top of the double-end elastic sheet (562). The bottom of the filter cylinder (54) is in contact with the bottom of the inner wall of the cover plate seat (52). The top of the filter cylinder (54) is in contact with the bottom of the valve plate seat (53).

4. The valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine according to claim 1, characterized in that: The alternating clamping member (57) includes a worm gear (571) movably connected to the inside of the fixed sleeve (4) via a bearing. Two eccentric wheels (572) are fixedly connected to the worm gear (571). A sliding sleeve (573) is fitted on the eccentric wheel (572). An arc plate (574) is fixedly connected to the bottom of the sliding sleeve (573). Four guide rods (575) are vertically fixedly connected to the top of the inner wall of the fixed sleeve (4). Two guide sleeves (576) are symmetrically fixedly connected to the sliding sleeve (573). The guide sleeves (576) are fitted on the guide rods (575). A transmission member (577) connected to the worm gear (571) is provided at the top of the fixed sleeve (4).

5. The valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine according to claim 4, characterized in that: The transmission component (577) includes a motor (5771) mounted on the top of the fixed sleeve (4). Two support plates (5772) are fixedly connected to the motor (5771). The support plates (5772) are fixedly mounted on the fixed sleeve (4) by bolts. A magnetic coupling disk one (5773) is fixedly connected to the output end of the motor (5771). A worm (5774) that meshes with the worm gear (571) is movably connected to the inside of the valve plate seat (53) through a bearing. A magnetic coupling disk two (5775) that works with the magnetic coupling disk one (5773) is fixedly connected to the top of the worm (5774). A time switch (5776) is fixedly connected to the fixed sleeve (4).

6. The valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine according to claim 5, characterized in that: The top of the inner wall of the fixed sleeve (4) is provided with a circular groove (8), the top of the magnetic coupling disk (5775) extends into the interior of the circular groove (8), and the bottom of the arc plate (574) is fixedly connected with a buffer pad (9), the bottom of the buffer pad (9) is in contact with the top of the double-ended elastic sheet (562).

7. The valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine according to claim 4, characterized in that: The anti-clogging cleaning component (6) includes a gear (61) fixedly connected to the worm gear (571), a ring (62) movably connected to the limiting ring (55) via a bearing, four scrapers (63) vertically fixedly connected to the inner side of the ring (62), and toothed rings (64) meshing on both sides of the gear (61), the toothed rings (64) being fixedly connected to the ring (62).

8. The valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine according to claim 4, characterized in that: The bottom of the worm gear (571) is provided with a driven unblocking component (10), which includes a commutator (101) fixedly connected to the bottom of the worm gear (571). The output end of the commutator (101) is fixedly connected to a rotating rod (102) located inside the oil drain hole (58). Two inclined plates (103) located inside the oil drain hole (58) are fixedly connected to the rotating rod (102) via a connecting rod.

9. The valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine according to claim 8, characterized in that: The bottom of the retaining sleeve (564) is provided with a sealing ring (11), the bottom of the sealing ring (11) is in contact with the top of the valve plate seat (53), the bottom of the commutator (101) is fixedly connected to the inside of the cover plate seat (52), and a sleeve plate (12) is fixedly connected to the inside of the cover plate seat (52), and the sleeve plate (12) is sleeved on the rotating rod (102).

10. A method for oil-gas separation using a valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine, characterized in that: Including the valve plate breather structure for a twin-cylinder V-type air-cooled diesel engine as described in any one of claims 1-9, and also Includes the following steps: S1: The oil and gas in the external crankcase rise into the concave cavity (51) of the cylinder head cover (1). The concave cavity (51) intercepts the large oil droplets of the oil mist through the cover plate seat (52), completing the initial filtration and separation of oil and gas. After the gas passes through the filter cylinder (54), the oil droplets in the oil mist are intercepted and attached by the pores of the filter cylinder (54), completing the fine filtration and separation of oil and gas. S2: The filtered gas enters the inner cavity of the double-hole sleeve (561) through the exhaust hole (563) at the bottom of the valve seat (53). When a negative pressure is generated inside the breathing hole (2), the pressure difference pushes the double-end elastic plate (562) to deform upward and open. The clean gas flows out through the double-hole sleeve (561) and flows into the breathing hole (2). After the negative pressure disappears, the double-end elastic plate (562) returns to its original position and fits against the top surface of the double-hole sleeve (561), blocking the reverse flow of air. S3: The oil droplets condensed on the outer wall of the filter cartridge (54) slide down under the action of gravity, gather at the bottom of the inner cavity of the cover plate seat (52), and flow back to the inside of the crankcase through the oil drain hole (58) to complete the oil recovery.

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