Diesel engine with annularly arranged pistons

Abstract

The invention discloses a diesel engine with pistons arranged annularly, which relates to the technical field of diesel engines and comprises an engine body, an output shaft, the pistons, oil sprayers and a gas distribution mechanism, the output shaft is rotatably arranged in the engine body, a plurality of cylinders are uniformly arranged in the engine body around the output shaft, the axes of the cylinders are parallel to the axis of the output shaft, and the pistons are axially and slidably arranged in the cylinders. The position, corresponding to the air cylinder, of the output shaft is fixedly provided with a rotating disc with a smooth transition wave-shaped rotating face unfolded. A notch in sliding fit with the rotating disc is formed in the middle of the piston. A plurality of pistons capable of doing work are arranged in single equipment, namely, a plurality of air cylinders are integrated, the pistons in the air cylinders can be driven to move through the rotating disc on the output shaft, linkage of the pistons in the different air cylinders can be ensured through the structural design of the rotating disc, the structural compactness is high, and occupied space is effectively reduced; and meanwhile, the output power of equipment can be improved through multi-piston movement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of diesel engines, in particular to a ring-arranged piston diesel engine. BACKGROUND

[0002] A conventional piston diesel engine is composed of a cylinder, a piston, a cylinder head, an intake valve, an exhaust valve, a piston pin, a connecting rod, a crankshaft, a bearing and a flywheel, etc. The piston completes four strokes in the movement: an intake stroke, a compression stroke, a combustion and work stroke and an exhaust stroke.

[0003] The working principle of the conventional piston diesel engine is as follows: when the piston moves from top to bottom, the intake valve is opened, fresh air filtered through an air cleaner enters the cylinder to complete the intake stroke; the piston moves from bottom to top, the intake and exhaust valves are both closed, the air is compressed, the temperature and pressure are increased, and the compression process is completed; when the piston is about to reach the top dead center, the fuel filter is sprayed into the combustion chamber in the form of mist, mixed with high-temperature and high-pressure air, and immediately self-ignites and burns, the high pressure formed pushes the piston downward to do work, drives the crankshaft to rotate, and completes the work stroke; after the work stroke is completed, the piston moves from bottom to top, the exhaust valve is opened to exhaust, and the exhaust stroke is completed; after several working cycles, the piston diesel engine gradually accelerates to work by itself under the inertia of the flywheel.

[0004] In some fields using piston diesel engines, such as the automotive field, in order to improve the output power, it is often necessary to set up multiple parallel cylinders to cooperate to complete power output, but multiple parallel cylinders will cause the problem of excessive size of the overall engine.

[0005] Therefore, people urgently need a ring-arranged piston diesel engine with small space occupation and high output power. SUMMARY

[0006] The purpose of the present application is to provide a ring-arranged piston diesel engine to solve the problems existing in the prior art, integrate several cylinders, effectively reduce the space occupation, and the movement of multiple pistons can improve the output power of the equipment.

[0007] In order to achieve the above object, the present application provides the following scheme: the present application provides a ring arrangement piston diesel engine, comprising a body, an output shaft, a piston, an oil injector and a valve gear for intake and exhaust, the output shaft is rotationally arranged in the body, a plurality of cylinders are arranged in the body, the axis of the cylinder is parallel to the axis of the output shaft, a plurality of the cylinders are uniformly distributed around the output shaft, the piston is axially slidably arranged in the cylinder, the output shaft is fixedly arranged with a rotating surface which is developed into a round and smooth transition wave-shaped rotating disc corresponding to the position of the cylinder, a notch is arranged in the middle of the piston and slidably cooperates with the rotating disc, the intake and exhaust passages of the valve gear and the oil injector are all communicated with the end of the cylinder, and the valve gear is arranged at the axial end of the cylinder.

[0008] Preferably, the notch of the piston is arranged with a roller on the wall surface on both sides of the rotating disc, and the piston is slidably arranged with the rotating disc through the roller.

[0009] Preferably, the axial both ends of the cylinder are provided with the valve gear.

[0010] Preferably, the valve gear comprises a base body for buckling at the axial end of the cylinder, a plurality of valve groups and a double-overhead disc cam, the valve group is arranged corresponding to the cylinder, the valve group comprises an intake passage, an exhaust passage, an intake valve and an exhaust valve, the setting radius of the second protrusion of the double-overhead disc cam is smaller than that of the first protrusion, the second protrusion is arranged in a staggered manner with the first protrusion, the intake passage and the exhaust passage are arranged in the base body, the intake valve and the exhaust valve each comprise a valve and a return spring, the valve head of the valve is located at the air outlet of the intake passage or the air inlet of the exhaust passage, the valve rod of the valve penetrates through the base body and extends outward to form a control end, the end of the control end is provided with an annular retainer, the annular retainer and the base body are provided with the return spring therebetween, a plurality of the exhaust valves are arranged corresponding to the first protrusion, a plurality of the intake valves are arranged corresponding to the second protrusion, and the overhead disc cam is drivingly connected with a driving structure.

[0011] Preferably, the overhead disc cam is coaxially fixedly arranged on the output shaft.

[0012] Preferably, a plurality of the intake passages are all connected with the external gas supply pipeline through a main gas path.

[0013] Preferably, the bottom of the machine body is provided with an oil pan for holding lubricating oil, and an oil pump is provided inside the oil pan. The machine body is provided with an oil inlet passage. The output shaft is hollow and has an oil inlet hole 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 corresponds to the oil outlet of the oil inlet passage. The oil inlet of the oil inlet passage is connected to the oil pump. The turntable is provided with a lubricating oil passage 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 the notch. The cavity where the turntable is located is connected to the oil pan.

[0014] Preferably, the inner cavity of the output shaft is connected to the lubricating oil circuit inside the double-overhead disc cam through a branch passage, the outlet of the lubricating oil circuit inside the double-overhead disc cam is connected to the control end of the air valve, and the bottom of the cavity where the double-overhead disc cam is located is connected to the oil pan through a return oil passage.

[0015] Preferably, an idler wheel is provided inside the oil pan and is driven by the output shaft, and the idler wheel is driven by the oil pump.

[0016] Preferably, the outer periphery of the machine body corresponding to the cylinder is provided with an annular cooling chamber for circulating coolant.

[0017] The present invention achieves the following main technical effects compared to the prior art: The single unit contains several pistons that can perform work, which is equivalent to integrating several cylinders into one. The turntable on the output shaft can drive the pistons in several cylinders to move. The structural design of the turntable can ensure the linkage of pistons in different cylinders. The structure is highly compact and effectively reduces space occupation. At the same time, the movement of multiple pistons can improve the output power of the equipment. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is an external structural diagram of the annular piston diesel engine of the present invention; Figure 2 This is a schematic diagram of the internal structure of the annular piston diesel engine of the present invention; Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle; Figure 4The schematic view of the connecting structure of the output shaft and the piston of the present application is shown in the figure; Figure 5 The schematic view of the structure of the rotating disc of the present application is shown in the figure; Figure 6 The schematic view of the structure of the cylinder cover of the present application is shown in the figure; Figure 7 The schematic view of the structure of the inlet and outlet passages of the cylinder cover of the present application is shown in the figure; Figure 8 The schematic view of the structure of the double-overhead disc cam of the present application is shown in the figure; Figure 9 The schematic view of the structure of the valve train of the present application is shown in the figure; Figure 10 The exploded view of the ring-arranged piston diesel engine of the present application is shown in the figure; Figure 11 The exploded view of the engine block of the present application is shown in the figure; In the figure, 1 is the engine block, 2 is the output shaft, 3 is the piston, 4 is the fuel injector, 5 is the valve train, 6 is the cylinder, 7 is the rotating disc, 8 is the notch, 9 is the roller, 10 is the cylinder cover, 11 is the double-overhead disc cam, 12 is the inlet passage, 13 is the outlet passage, 14 is the inlet valve, 15 is the outlet valve, 16 is the first protrusion, 17 is the second protrusion, 18 is the return spring, 19 is the main air passage, 20 is the first mounting engine block, 21 is the second mounting engine block, 22 is the cover, 23 is the central through hole, 24 is the mounting through hole, 25 is the avoiding slot, 26 is the transverse tension bolt, 27 is the cylinder sleeve, 28 is the annular cooling cavity, 29 is the oil pan, 30 is the oil pump, 31 is the oil inlet passage, 32 is the oil inlet hole, 33 is the lubricating oil passage, 34 is the oil return passage, 35 is the idler, and 36 is the supporting leg. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0021] The purpose of the present application is to provide a ring-arranged piston diesel engine to solve the problems in the prior art, integrate several cylinders, effectively reduce the space occupation, and improve the output power of the equipment through the movement of multiple pistons.

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Please refer to the figures as Figures 1-11As shown, an annular arrangement piston diesel engine is provided, comprising a body 1, an output shaft 2, a piston 3, an oil injector 4 and a valve gear 5, the valve gear 5 is mainly used for intake in the intake stroke and exhaust in the exhaust stroke, the oil injector 4 is used for oil injection, the output shaft 2 is rotatably arranged in the body 1, a plurality of cylinders 6 are arranged in the body 1, the axis of the cylinder 6 is parallel to the axis of the output shaft 2, the plurality of cylinders 6 are uniformly distributed around the output shaft 2, the inner diameter of the cylinder 6 matches the outer diameter of the piston 3, the piston 3 is axially slidably arranged in the cylinder 6, the output shaft 2 is fixedly provided with a rotating surface which is developed into a round transition wave-shaped rotating disc 7 at the position corresponding to the cylinder 6, the wave shape can be cosine shape or multi-step triangular function, etc., a notch 8 is formed in the middle of the piston 3 and slidably matched with the rotating disc 7, the intake port 12 and the exhaust port 13 of the valve gear 5 are communicated with the end of the cylinder 6, the valve gear 5 is arranged at the axial end of the cylinder 6, and the single device has a plurality of pistons 3 that can do work, which is equivalent to integrating a plurality of cylinders 6 into one, the rotating disc 7 on the output shaft 2 can drive the pistons 3 in the plurality of cylinders 6 to move, and the wave-shaped structure design of the rotating surface of the rotating disc 7 can ensure the linkage of the pistons 3 in different cylinders 6 (the strokes of the plurality of cylinders 6 are not synchronized, and the movement generated when a certain cylinder 6 does work stroke drives another cylinder 6 to do intake stroke, compression stroke or exhaust stroke), the structure is compact, the space occupation is effectively reduced, and the output power of the device can be improved by the movement of the plurality of pistons 3.

[0024] In order to increase the service life of the device and reduce the friction between the piston 3 and the rotating disc 7, a roller 9 is arranged on the wall surface on both sides of the notch 8 of the piston 3, the piston 3 is slidably arranged with the rotating disc 7 through the roller 9, the axis of the roller 9 is perpendicular to the axis of the output shaft 2, and the specific arrangement mode of the roller 9 is that a groove is arranged on the wall surface of the notch 8 for embedding the roller 9, the roller 9 is fixed in the groove through a pin, the pin hole extends from the side of the piston 3 away from the notch 8 to the inner side wall of the groove close to the output shaft 2, and a stopper is arranged at the pin hole of the side of the piston 3 away from the notch 8 to block the pin from coming out, or the pin is replaced by a bolt and the pin hole is replaced by a threaded hole, and the position of the bolt corresponding to the roller 9 is a smooth surface, and the position of the bolt is fixed by thread connection at this time.

[0025] When the valve gear 5 is arranged only at one axial end of the cylinder 6, a gas port needs to be arranged at the other end to avoid the high pressure or negative pressure generated when the piston 3 moves, and to block the normal movement of the piston 3.

[0026] In order to further improve the output power of the device, the valve gear 5 is arranged at both axial ends of the cylinder 6, that is, the cylinders 6 appear in pairs and are oppositely arranged in the embodiment, and three sets of opposite cylinders 6 are arranged in the embodiment, that is, six cylinders 6 are equivalent.

[0027] When the number of single-side cylinder 6 is odd, the structure is suitable for four-stroke and two-stroke diesel engine; when the number of single-side cylinder 6 is even, the structure is suitable for four-stroke diesel engine.

[0028] The valve gear 5 comprises a base body for buckling on the axial end of the cylinder 6, a plurality of valve groups corresponding to the cylinder 6, and a double-overhead disc cam 11, the valve group comprises an intake port 12, an exhaust port 13, an intake valve 14 and an exhaust valve 15, the setting radius of the second protrusion 17 of the double-overhead disc cam 11 is smaller than that of the first protrusion 16, the second protrusion 17 is arranged in a staggered manner with the first protrusion 16, the intake port 12 and the exhaust port 13 are arranged in the base body, the intake valve 14 and the exhaust valve 15 each comprise a valve and a return spring 18, the valve comprises a valve stem and a valve head at the end of the valve body for sealing, the valve head is located at the gas outlet of the intake port 12 or the gas inlet of the exhaust port 13, one end of the valve stem is connected with the valve head, the other end penetrates through the base body and extends outward to form a control end, an annular retainer is arranged at the end of the control end, and the return spring 18 is arranged between the annular retainer and the base body, a plurality of exhaust valves 15 are arranged corresponding to the first protrusion 16, and a plurality of intake valves 14 are arranged corresponding to the second protrusion 17, the overhead disc cam is in transmission connection with the driving structure, the control of all exhaust valves 15 and intake valves 14 can be completed by using one double-overhead disc cam 11, without the intervention of electric valves and other single-point control structures, and integrated design is realized.

[0029] A rolling wheel can be arranged at the end of the control end corresponding to the first protrusion 16 or the second protrusion 17, so that the friction between the control end and the first protrusion 16 or the second protrusion 17 is converted from sliding friction to rolling friction.

[0030] The double-overhead disc cam 11 is coaxially fixed on the output shaft 2, and the output shaft 2 is used as the driving structure of the double-overhead disc cam 11, thereby saving the arrangement of other driving structures.

[0031] Since the arrangement of the double-overhead disc cam 11 will affect the arrangement of the fuel injector 4, the outer port of the fuel injector 4 is arranged obliquely towards the outer circumferential side of the double-overhead disc cam 11, so that the inner port of the fuel injector 4 is actually still located in the coverage range of the overhead disc cam, that is, the cylinder 6 is located in the coverage range of the overhead disc cam, compared with the case that the fuel injector 4 is arranged on the outer circumferential side of the overhead disc cam, the cylinder 6 is also arranged outward, which can effectively reduce the volume of the overall equipment.

[0032] The plurality of intake ports 12 are connected in communication with the external air supply pipeline through the main air path 19, the main air path 19 comprises a circular segment and a straight segment, the circular segment is arranged close to the output shaft 2, one end of the straight segment is connected in communication with the external air supply pipeline, and the other end is connected in communication with the circular segment, and the plurality of intake ports 12 are connected in communication with the circular segment.

[0033] The specific structure of the body 1 includes a first mounting body 20, a second mounting body 21, a cylinder cover 10, and a cover 22. The first mounting body 20 and the second mounting body 21 are both provided with a central through hole 23 and a plurality of mounting through holes 24 uniformly distributed around the central through hole 23. The output shaft 2 is rotationally arranged in the central through hole 23. The corresponding mounting through holes 24 of the first mounting body 20 and the second mounting body 21 are spliced to form the opposed cylinder 6. The end of the second mounting body 21 close to the first mounting body 20 is provided with an avoiding slot 25 for avoiding the rotating disc 7. The end of the first mounting body 20 away from the second mounting body 21 and the end of the second mounting body 21 away from the first mounting body 20 are both buckled with the cylinder cover 10. The cylinder cover 10 is the base body of the valve mechanism 5. The cylinder cover 10 is buckled with the cover 22 outside. The cover 22, the cylinder cover 10, the first mounting body 20, and the second mounting body 21 are connected through transverse tensioning bolts 26. The cylinder sleeve 27 can be arranged in the mounting through hole 24. The outer diameter of the cylinder sleeve 27 matches the inner diameter of the mounting through hole 24. The cylinder sleeve 27 is made of wear-resistant material and replaces the mounting through hole 24 to cooperate with the piston 3.

[0034] When the cylinder sleeve 27 is not arranged, the body 1 (i.e. the first mounting body 20 and the second mounting body 21) is provided with an annular cooling cavity 28 on the outer circumferential side corresponding to the cylinder 6 for circulating the cooling liquid. When the cylinder sleeve 27 is arranged, an annular groove can be arranged on the outer circumferential wall of the cylinder sleeve 27 or the inner circumferential wall of the mounting through hole 24. After the mounting through hole 24 is connected with the cylinder sleeve 27, an annular cavity is formed as the annular cooling cavity 28.

[0035] Since the lubricating oil needs to be supplied to the roller 9 at the gap 8 to reduce frictional loss during the operation of the equipment, an oil pan 29 for containing lubricating oil is arranged at the bottom of the body 1. The oil pump 30 is arranged in the oil pan 29. The oil inlet channel 31 is arranged in the body 1. The output shaft 2 is hollow. The oil inlet hole 32 is radially arranged on the output shaft 2. The annular oil groove is arranged on the output shaft 2 corresponding to the position of the oil inlet hole 32. The annular oil groove always corresponds to the oil outlet of the oil inlet channel 31 during the rotation of the output shaft 2. The oil inlet of the oil inlet channel 31 is connected with the oil pump 30 through the filter device and other filtering equipment in the external environment. The lubricating oil channel 33 is arranged in the rotating disc 7 and connected with the inner cavity of the output shaft 2. The end of the lubricating oil channel 33 away from the output shaft 2 is connected with the gap 8. The cavity where the rotating disc 7 is located is connected with the oil pan 29 for returning the lubricating oil to the oil pan 29. During the rotation of the output shaft 2, the annular oil groove always maintains the connection with the oil inlet channel 31. The oil in the annular oil groove enters the output shaft 2 through the oil inlet hole 32. The lubricating oil is sprayed into the gap 8 through the output shaft 2 and the rotating disc 7 to complete the lubrication.

[0036] The inner cavity of the output shaft 2 is communicated with the inner lubricating oil passage of the double-overhead disc cam 11 through a branch passage, the outlet of the inner lubricating oil passage of the double-overhead disc cam 11 is communicated with the position where the control end of the air valve is located, the bottom of the cavity where the double-overhead disc cam 11 is located is communicated with the oil pan 29 through an oil return passage 34, so as to realize the lubrication of the working surface of the double-overhead disc cam 11 and the end surface or the rolling wheel of the control end of the air valve in contact with the working surface.

[0037] In order to improve the compactness of the equipment and reduce the addition of other driving equipment, the idler gear 35 driven by the output shaft 2 is arranged in the oil pan 29, the idler gear 35 can be gear meshing transmission with the output shaft 2, the idler gear 35 is directly transmission connected or indirectly transmission connected with the oil pump 30, when directly transmission connected, the idler gear 35 is directly fixedly connected with the input shaft of the oil pump 30, when indirectly transmission connected, the transmission shaft is arranged on the idler gear 35, the transmission shaft is transmission connected with the input shaft of the oil pump 30 through the mode of belt transmission or gear transmission.

[0038] The idler gear 35 is rotatably installed in the avoiding groove 25 of the first mounting body 20 or the second mounting body 21.

[0039] A plurality of supporting legs 36 are arranged at the bottom of the first mounting body 20 and the second mounting body 21, so as to realize the support of the whole equipment.

[0040] In actual working engineering, taking the movement of the piston 3 in the single cylinder 6 of the four-stroke diesel engine as an example, the piston 3 in the single cylinder 6 performs two complete strokes, and the stroke sequence on both sides is: one side is intake stroke-compression stroke-power stroke-exhaust stroke, and the other side is compression stroke-power stroke-exhaust stroke-intake stroke; in the intake stroke, the second protrusion 17 drives the intake valve 14, the intake port 12 is opened, and the air is inhaled into the cylinder 6; in the compression stroke, the intake port 12 and the exhaust port 13 are closed, and the piston 3 moves to compress the cavity space; in the last stage of the compression stroke and the initial stage of the power stroke, the oil injector 4 sprays oil, the diesel engine pressure burns, and drives the piston 3 to move; in the exhaust stroke, the second cam drives the exhaust valve 15, the exhaust port 13 is opened, and the gas in the cylinder 6 is discharged; in the complete stroke, the movement of the piston 3 drives the rotating disc 7 to rotate, and then the rotation of the output shaft 2 is realized.

[0041] The adaptive changes according to actual needs are within the protection scope of the present application.

[0042] It is apparent that a person skilled in the art can, without departing from the scope of the application, make many modifications to the details of the above-described exemplary embodiments of the application. The application is therefore not limited to the details given hereinabove but can be implemented in other forms without departing from the spirit or essential characteristic of the application. The embodiments shall be considered demonstrative and shall not be considered limiting in any way. The scope of the application is defined by the appended claims rather than by the description given above and therefore all changes that come within the meaning and range of equivalents of the claims are to be embraced by the application. Any reference signs in the claims should not be construed as limiting the scope of the claims to the features

[0043] The above description of the application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form described. Many modifications and variations are possible in light of the above teaching. It is intended that the scope of the application be limited not with this detailed description, but rather by the claims appended hereto.

Claims

1. A ring-arranged piston diesel engine, characterized in that, The device includes a body, an output shaft, a piston, a fuel injector, and a valve train for intake and exhaust. The output shaft is rotatably mounted in the body, which contains several 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 fuel injector, are all connected to the end of the cylinder. The valve train is located at the axial end of the cylinder.

2. The annular piston diesel engine according to claim 1, characterized in that, The piston has a notch located on the walls on both sides of the turntable, where rollers are provided, and the piston slides on the turntable via the rollers.

3. The annular piston diesel engine according to claim 1, characterized in that, The cylinder is equipped with the valve distribution mechanism at both ends of its axial direction.

4. The annular piston diesel engine according to claim 1, characterized in that, The valve train includes a base for engaging with the axial end of the cylinder, several valve train assemblies, and a double overhead disc cam. Each valve train assembly corresponds to the cylinder and includes an intake manifold, an exhaust manifold, an intake valve assembly, and an exhaust valve assembly. The radius of the second protrusion of the double overhead disc cam is smaller than the radius of the first protrusion, and the second protrusion is offset from the first protrusion. Both the intake manifold and the exhaust manifold are located within the base. Both the intake valve assembly and the exhaust valve assembly include a valve and a return spring. The valve head of the valve is located at the outlet of the intake manifold or the inlet of the exhaust manifold. The valve stem of the valve passes through the base and extends outward to form a control end. An annular retaining ring is provided at the end of the control end, and the return spring is provided between the annular retaining ring and the base. Several exhaust valve assemblies correspond to the first protrusion, and several intake valve assemblies correspond to the second protrusion. The overhead disc cam is connected to a drive structure.

5. The annular piston diesel engine according to claim 4, characterized in that, The top-mounted disc cam is coaxially fixed on the output shaft.

6. The annular piston diesel engine according to claim 4, characterized in that, All of the aforementioned air intakes converge and connect to the external air supply pipeline via the main air passage.

7. The annular piston diesel engine according to claim 4, characterized in that, The bottom of the machine body is provided with an oil pan for holding lubricating oil. An oil pump is installed inside the oil pan. An oil inlet passage is provided inside the machine body. The output shaft is hollow and has an oil inlet hole radially arranged on it. An annular oil groove is provided on the output shaft corresponding to the position of the oil inlet hole. The annular oil groove corresponds to the oil outlet of the oil inlet passage. The oil inlet of the oil inlet passage is connected to the oil pump. The turntable 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 the notch. The cavity where the turntable is located is connected to the oil pan.

8. The annular piston diesel engine according to claim 7, characterized in that, The inner cavity of the output shaft is connected to the lubricating oil circuit inside the double-top disc cam through a branch passage. The outlet of the lubricating oil circuit inside the double-top disc cam is connected to the control end of the air valve. The bottom of the cavity where the double-top disc cam is located is connected to the oil pan through a return oil passage.

9. The annular piston diesel engine according to claim 7, characterized in that, An idler wheel, which is driven by the output shaft, is provided inside the oil pan and is connected to the oil pump.

10. The annular piston diesel engine according to claim 1, characterized in that, The machine body has an annular cooling chamber for circulating coolant on the outer periphery of the cylinder.

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