Piston lubricating system of annularly arranged diesel engine

Abstract

The invention relates to the technical field of diesel engines, and discloses a piston lubricating system of an annularly-arranged diesel engine, which comprises an annularly-arranged diesel engine body and an oil supply unit, an output shaft of the annularly-arranged diesel engine body is hollow, an oil inlet hole is radially formed in the output shaft, and an annular oil groove is formed in the position, corresponding to the oil inlet hole, of the output shaft; an annular channel is formed between the annular oil groove and a machine body of the annularly-arranged diesel engine body, the oil supply unit communicates with the annular channel, and a lubricating oil way communicating with an inner cavity of the output shaft is arranged in a rotary disc of the annularly-arranged diesel engine body. The end, away from the output shaft, of the lubricating oil way communicates with a notch formed in a piston of the annularly-arranged diesel engine body. A cavity where the rotary disc is located communicates with the oil return way. Lubricating oil supplied by the oil supply unit sequentially passes through the annular passage, the inner cavity of the output shaft and the lubricating oil way to be sprayed to the notch of the piston, so that the piston is lubricated, and the service life of the annularly-arranged diesel engine is prolonged.

Description

Technical Field

[0001] This invention relates to the field of diesel engine technology, and in particular to a piston lubrication system for a diesel engine with an annular arrangement. Background Technology

[0002] A traditional piston diesel engine consists of components such as a cylinder, piston, cylinder head, intake valve, exhaust valve, piston pin, connecting rod, crankshaft, bearings, and flywheel. The piston completes four strokes during its movement: intake stroke, compression stroke, combustion and power stroke, and exhaust stroke.

[0003] The working principle of a traditional piston diesel engine is as follows: When the piston moves downward, the intake valve opens, and fresh air filtered by the air filter enters the cylinder to complete the intake stroke; when the piston moves upward, both the intake and exhaust valves are closed, the air is compressed, and the temperature and pressure increase, completing the compression process; when the piston is about to reach its highest point, the injector sprays filtered fuel in a mist into the combustion chamber, mixes with the high-temperature and high-pressure air, and immediately ignites and burns. The resulting high pressure pushes the piston downward to do work, driving the crankshaft to rotate, completing the power stroke; after the power stroke ends, the piston moves upward, the exhaust valve opens, and exhausts the air, completing the exhaust stroke; after several working cycles, the piston diesel engine gradually accelerates under the inertia of the flywheel until it can operate independently.

[0004] In certain fields using piston diesel engines, such as the automotive industry, to increase output power, multiple cylinders are often required to work together to achieve power output while minimizing space occupation. Therefore, a specific annular arrangement diesel engine is needed to achieve power output. The power principle of an annular arrangement diesel engine is the same as that of a traditional piston diesel engine, where the piston performs work to drive the output shaft. However, the structure differs. In an annular arrangement diesel engine, multiple cylinders are arranged around the output shaft, with the cylinder axes parallel to the output shaft axis. A rotating disk with a smoothly transitioning wave shape is installed on the output shaft. The piston inside the cylinder cooperates with the disk, thereby driving the output shaft. Although this type of annular arrangement diesel engine can achieve multi-cylinder collaborative work while reducing space occupation, there is no relevant lubrication technology to provide lubrication for the piston movement. The piston rubs against the cylinder wall during movement, reducing the piston's service life.

[0005] Therefore, there is an urgent need for a ring-arranged piston diesel engine that can lubricate the piston and improve its service life. Summary of the Invention

[0006] The purpose of this invention is to provide a piston lubrication system for a ring-shaped diesel engine to solve the problems existing in the prior art. By designing the internal passage of the ring-shaped diesel engine, lubrication is provided to the piston, thereby improving the service life of the ring-shaped diesel engine.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a piston lubrication system for a ring-shaped diesel engine, comprising a ring-shaped diesel engine body and an oil supply unit. The output shaft of the ring-shaped diesel engine body is hollow, and an oil inlet hole is radially provided on the output shaft. An annular oil groove is provided on the output shaft corresponding to the position of the oil inlet hole. An annular passage is formed between the annular oil groove and the engine body of the ring-shaped diesel engine body. The oil supply unit is connected to the annular passage. A lubricating oil passage is provided inside the turntable of the ring-shaped diesel engine body, which is connected to the inner cavity of the output shaft. The end of the lubricating oil passage away from the output shaft is connected to the notch provided on the piston of the ring-shaped diesel engine body. The cavity where the turntable is located is connected to the return oil passage.

[0008] Preferably, the annular diesel engine body includes an engine block, an output shaft, a piston, an injector, and a valve train for intake and exhaust. The output shaft is rotatably mounted in the engine block, which contains a plurality of cylinders. The axes of the cylinders are parallel to the axis of the output shaft, and the cylinders are evenly distributed around the output shaft. The piston is axially slidably mounted in the cylinder. A rotating disk with a smoothly transitioning wave shape is fixedly mounted on the output shaft corresponding to the position of the cylinder. A notch is provided in the middle of the piston to slide with the rotating disk. The intake and exhaust passages of the valve train, as well as the injector, are all connected to the end of the cylinder. The valve train is located at the axial end of the cylinder.

[0009] Preferably, the oil supply unit includes an oil tank and an oil pump, the oil pump is disposed in the oil tank, and the output end of the oil pump is connected to the annular passage through an oil inlet passage.

[0010] Preferably, the cavity containing the turntable is connected to the oil tank through the oil return passage.

[0011] Preferably, the fuel tank is located at the bottom of the annular diesel engine body, and the fuel inlet passage is provided on the engine body of the annular diesel engine body.

[0012] Preferably, the engine body of the annularly arranged diesel engine body is provided with a clearance groove corresponding to the position of the turntable, and the clearance groove is the oil return passage.

[0013] Preferably, the output shaft is driven by an idler wheel, and the idler wheel is driven by an oil pump.

[0014] Preferably, the idler wheel is connected to the output shaft via a gear transmission.

[0015] Preferably, a filter is provided between the oil pump and the oil inlet passage.

[0016] Preferably, the oil tank is provided with an oil drain port and an oil filler port.

[0017] The present invention achieves the following main technical effects compared to the prior art:

[0018] The lubricating oil supplied by the oil supply unit enters the inner cavity of the output shaft through the annular passage, and then enters the lubricating oil passage of the turntable from the inner cavity of the output shaft. It is then sprayed from the lubricating oil passage onto the notch of the piston, so that the notch of the piston is covered with lubricating oil. The notch will move with the movement of the piston, and the lubricating oil at the notch will be transferred to the movement path of the piston, thereby achieving lubrication of the piston and improving the service life of the annular diesel engine. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments 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.

[0020] Figure 1 This is a schematic diagram of the piston lubrication system of a ring-shaped diesel engine in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the piston, turntable and output shaft of the diesel engine body arranged in a ring according to an embodiment of the present invention;

[0022] Among them, 1. Circular arrangement of diesel engine body; 2. Engine body; 3. Output shaft; 4. Piston; 5. Cylinder; 6. Turntable; 7. Notch; 8. Circumferential groove; 9. Fuel tank; 10. Oil pump; 11. Oil inlet passage; 12. Circular passage; 13. Oil inlet hole; 14. Lubricating oil passage; 15. Idler wheel. Detailed Implementation

[0023] 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.

[0024] The purpose of this invention is to provide a piston lubrication system for a ring-shaped diesel engine to solve the problems existing in the prior art. By designing the internal passage of the ring-shaped diesel engine, lubrication is provided to the piston, thereby improving the service life of the ring-shaped diesel engine.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Please refer to the following: Figure 1 , Figure 2 As shown, a piston lubrication system for a ring-shaped diesel engine is provided, including a ring-shaped diesel engine body 1 and an oil supply unit. The output shaft 3 of the ring-shaped diesel engine body 1 is hollow, and an oil inlet hole 13 is radially provided on the output shaft 3. An annular oil groove is provided on the output shaft 3 at the position corresponding to the oil inlet hole 13. The inner diameter of the engine body 2 of the ring-shaped diesel engine body 1 at the annular oil groove matches the outer diameter of the output shaft 3 at that position. An annular passage 12 is formed between the annular oil groove and the engine body 2 of the ring-shaped diesel engine body 1. The oil supply unit is connected to the annular passage 12. The turntable 6 of the ring-shaped diesel engine body 1 has an internal cavity that communicates with the inner cavity of the output shaft 3. The lubricating oil passage 14 has one end away from the output shaft 3 connected to the notch 7 of the piston 4 of the annular diesel engine body 1. The cavity where the turntable 6 is located is connected to the return oil passage. The lubricating oil supplied by the oil supply unit enters the inner cavity of the output shaft 3 from the annular passage 12, and then enters the lubricating oil passage 14 of the turntable 6 from the inner cavity of the output shaft 3. The lubricating oil is sprayed from the lubricating oil passage 14 onto the notch 7 of the piston 4, so that the notch 7 of the piston 4 is contaminated with lubricating oil. The notch 7 moves with the movement of the piston 4, and the lubricating oil at the notch 7 is transferred to the movement path of the piston 4, thereby achieving lubrication of the piston 4 and improving the service life of the annular diesel engine.

[0027] In this embodiment, the annular diesel engine body 1 includes an engine block 2, an output shaft 3, a piston 4, an injector, and a valve train for intake and exhaust. The output shaft 3 is rotatably mounted in the engine block 2. Several cylinders 5 are mounted in the engine block 2, with the axes of the cylinders 5 parallel to the axis of the output shaft 3. The cylinders 5 are evenly distributed around the output shaft 3. The piston 4 is axially slidably mounted in the cylinders 5. A rotating disk 6 with a smoothly transitioning wave-like surface is fixedly mounted on the output shaft 3 corresponding to the position of the cylinder 5. A notch 7 is provided in the middle of the piston 4 to slide with the rotating disk 6. The intake passage of the valve train is... The exhaust port and fuel injector are all connected to the end of cylinder 5. The valve train is located at the axial end of cylinder 5. Its working principle is as follows: the axial movement of piston 4 in cylinder 5 will squeeze the turntable 6 to move. Since the rotating surface of turntable 6 unfolds into a smooth transition wave shape, piston 4 will actually squeeze turntable 6 to rotate around the axis of output shaft 3, thereby driving output shaft 3 to move. It should be noted that the strokes in multiple cylinders 5 are not synchronized. When a power stroke is performed in one cylinder 5, the movement generated drives the intake stroke, compression stroke, or exhaust stroke in another cylinder 5.

[0028] In this embodiment, the oil supply unit includes an oil tank 9 and an oil pump 10. The oil pump 10 is installed in the oil tank 9. The output end of the oil pump 10 is connected to the annular passage 12 through the oil inlet passage 11. The oil pump 10 pumps the lubricating oil from the oil tank 9 into the oil inlet passage 11.

[0029] The cavity containing the turntable 6 is connected to the oil tank 9 through the oil return passage, so that the lubricating oil flows back into the oil tank 9 for reuse, thus saving lubricating oil resources.

[0030] In some embodiments, the fuel tank 9 can be located at the bottom of the annular diesel engine body 1, and the top of the fuel tank 9 has an open structure. The opening at the top of the fuel tank 9 can be blocked by the body 2 of the annular diesel engine body 1. At this time, the fuel inlet passage 11 can be directly opened on the body 2 of the annular diesel engine body 1.

[0031] The engine body 2 of the circularly arranged diesel engine body 1 is provided with a clearance groove 8 at the position corresponding to the turntable 6. The clearance groove 8 can avoid the rotation of the turntable 6 and avoid interference with the turntable 6. Based on the clearance groove 8, the clearance groove 8 can be used as an oil return passage. The lubricating oil falls directly back to the oil tank 9 at the bottom through the clearance groove 8, saving the need to open an additional oil return passage and reducing costs.

[0032] In some embodiments, since the output shaft 3 is driven to rotate by the piston 4 in the cylinder 5, an idler wheel 15 can be rotatably installed on the engine body 2 of the annularly arranged diesel engine body 1. The output shaft 3 is connected to the idler wheel 15, and the idler wheel 15 is connected to the oil pump 10. The movement of the output shaft 3 drives the oil pump 10 to work, saving the need for additional drive equipment.

[0033] The idler wheel 15 can be installed in the clearance groove 8 opened at the position of the turntable 6 on the engine body 2 of the annular diesel engine body 1, making full use of the space of the clearance groove 8 and improving the space utilization rate.

[0034] The idler wheel 15 can be connected to the output shaft 3 via gear transmission. The output shaft 3 can be directly or indirectly connected to the idler wheel 15. When directly connected, the idler wheel 15 is directly fixedly connected to the input shaft of the oil pump 10. When indirectly connected, the idler wheel 15 is equipped with a transmission shaft, and the transmission shaft and the input shaft of the oil pump 10 are connected by belt transmission or gear transmission.

[0035] In some embodiments, a filter is provided between the oil pump 10 and the oil inlet passage 11 to filter the pumped lubricating oil and prevent lubricating oil containing impurities from clogging the oil passage or affecting the normal movement of the piston 4.

[0036] The oil tank 9 is equipped with an oil drain port and an oil filling port. Waste lubricating oil can be discharged through the oil drain port and new lubricating oil can be added through the oil filling port. Both the oil drain port and the oil filling port are equipped with plugs to seal them when not in use.

[0037] A groove can be opened on the piston 4 near the output shaft 3. The groove and the inner wall of the cylinder 5 form a chamber that can hold some lubricating oil, thereby increasing the amount of lubricating oil when the piston 4 moves and improving the lubrication effect on the piston 4.

[0038] In actual use, the movement of piston 4 drives output shaft 3 to rotate via turntable 6. Output shaft 3 drives oil pump 10 to work via idler wheel 15. Oil pump 10 pumps lubricating oil from oil tank 9 through oil inlet passage 11, annular passage 12, oil inlet hole 13, inner cavity of output shaft 3 and lubricating oil passage 14 to the notch 7 of piston 4, thereby achieving lubrication of piston 4.

[0039] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0040] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A piston lubrication system for a diesel engine with an annular arrangement, characterized in that, The device includes a ring-shaped diesel engine body and a fuel supply unit. The output shaft of the ring-shaped diesel engine body is hollow, and an oil inlet hole is radially provided on the output shaft. An annular oil groove is provided on the output shaft corresponding to the position of the oil inlet hole. The annular oil groove and the engine body of the ring-shaped diesel engine body form an annular passage. The fuel supply unit is connected to the annular passage. The turntable of the ring-shaped diesel engine body has a lubricating oil passage inside that is connected to the inner cavity of the output shaft. The end of the lubricating oil passage away from the output shaft is connected to a notch provided on the piston of the ring-shaped diesel engine body. The cavity where the turntable is located is connected to the return oil passage.

2. The piston lubrication system of the annular diesel engine according to claim 1, characterized in that, The annular diesel engine body includes an engine block, an output shaft, a piston, an injector, and a valve train for intake and exhaust. The output shaft is rotatably mounted in the engine block, which contains a plurality of cylinders. The axes of the cylinders are parallel to the axis of the output shaft, and the cylinders are evenly distributed around the output shaft. The piston is axially slidably mounted in the cylinder. A rotating disk with a smoothly transitioning wave shape is fixedly mounted on the output shaft corresponding to the position of the cylinder. A notch is provided in the middle of the piston to slide with the rotating disk. The intake and exhaust passages of the valve train, as well as the injector, are all connected to the end of the cylinder. The valve train is located at the axial end of the cylinder.

3. The piston lubrication system of the annular diesel engine according to claim 1, characterized in that, The oil supply unit includes an oil tank and an oil pump. The oil pump is installed in the oil tank, and the output end of the oil pump is connected to the annular passage through an oil inlet passage.

4. The piston lubrication system of the annular diesel engine according to claim 3, characterized in that, The cavity containing the turntable is connected to the oil tank through the oil return passage.

5. The piston lubrication system of the annular diesel engine according to claim 3, characterized in that, The fuel tank is located at the bottom of the annular diesel engine body, and the fuel inlet passage is provided on the engine body of the annular diesel engine body.

6. The piston lubrication system of the annular diesel engine according to claim 5, characterized in that, The engine body of the circularly arranged diesel engine is provided with a clearance groove corresponding to the position of the turntable, and the clearance groove is the oil return passage.

7. The piston lubrication system of the annular diesel engine according to claim 3, characterized in that, The output shaft is connected to the idler wheel, and the idler wheel is connected to the oil pump.

8. The piston lubrication system of the annular diesel engine according to claim 7, characterized in that, The idler wheel is connected to the output shaft via gear transmission.

9. The piston lubrication system of the annular diesel engine according to claim 3, characterized in that, A filter is installed between the oil pump and the oil inlet passage.

10. The piston lubrication system of the annular diesel engine according to claim 3, characterized in that, The oil tank is equipped with an oil drain port and an oil filler port.

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