A cylinder head and small aero-engine

Abstract

The utility model discloses a cylinder head and small -size aero -engine, cylinder head includes cylinder body and end portion heat abstractor, and the axial one end of cylinder body is provided with first mounting hole, end portion heat abstractor is connected in the axial one end of cylinder body, and end portion heat abstractor is provided with first heat dissipation mechanism and second mounting hole, and second mounting hole is along its axial with first mounting hole corresponding and intercommunication, and first heat dissipation mechanism is set up around second mounting hole, and first heat dissipation mechanism is provided with first avoiding part, and second mounting hole sets up in first avoiding part. Small -size aero -engine has applied above -mentioned a kind of cylinder head, and is provided with first avoiding part, and the spark plug cap installation and disassembly of spark plug module are provided with sufficient avoiding space, to improve the installation, overhaul and maintenance efficiency to cylinder head.

Description

Technical Field

[0001] This utility model relates to the field of small aircraft engine manufacturing technology, and in particular to a cylinder head and a small aircraft engine. Background Technology

[0002] In the field of small aviation, fuel-powered aircraft are a type of aircraft that uses fuel as its power source. Compared with the currently widely used small electric aircraft, fuel-powered aircraft have irreplaceable advantages in many application scenarios with high requirements for operating time and carrying capacity, due to their significantly longer endurance and larger payload capacity. Typical examples include long-distance logistics transportation, wide-area geographic mapping, large-scale agricultural and forestry plant protection, and long-term continuous reconnaissance missions. The power plant of these aircraft mainly relies on small aero engines, which are usually two-stroke or four-stroke spark-ignition piston engines. In the components of a small aero engine, the cylinder is the key component for converting thermal energy into mechanical energy. It not only provides the combustion site for the fuel-air mixture, but also forms a periodically variable sealed working volume by cooperating with the top of the piston. Currently, small aero engine cylinders generally use spark plugs as the core component for igniting the air-fuel mixture. To optimize ignition performance, the spark plug is usually located on the axial side of the cylinder away from the piston. At the same time, to enhance the cooling efficiency of the cylinder, an end cooling device with cooling fins is usually installed on this side. Spark plugs are usually installed directly on the end heat sink, which makes it particularly difficult to arrange and fix the spark plugs among the dense heat sink fins. This not only limits the installation space, but also makes daily maintenance, inspection and replacement inconvenient, affecting the efficiency of small aircraft engine maintenance. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a cylinder head and a small aero engine, wherein the small aero engine utilizes a cylinder head provided in this application. The cylinder head is provided with a first clearance portion, which not only provides ample clearance space for the installation and removal of the spark plug cap, but also creates spacious and convenient conditions for manual or robotic arm operation, facilitating rapid and stable connection or removal between the spark plug cap and the spark plug, significantly improving assembly efficiency; furthermore, the first clearance portion effectively prevents collisions with the first heat dissipation mechanism during the installation of the spark plug cap and spark plug.

[0004] In a first aspect, a cylinder head according to an embodiment of the present utility model includes: The cylinder block has a first mounting hole at one axial end. An end cooling device is connected to one axial end of the cylinder body. The end cooling device is provided with a first cooling mechanism and a second mounting hole. The second mounting hole corresponds to and communicates with the first mounting hole along its axial direction. The first cooling mechanism is arranged around the second mounting hole. The first cooling mechanism is provided with a first clearance part. The second mounting hole is located in the first clearance part.

[0005] A cylinder head according to an embodiment of the present utility model has at least the following beneficial effects: After the spark plug in the spark plug module is installed into the second mounting hole, it is also located within the space of the first clearance section. When it is necessary to install the spark plug cap of the spark plug module to the end of the spark plug away from the cylinder block, the operator can use the first clearance section to smoothly insert the spark plug cap and accurately align it with the end of the spark plug. The first clearance section not only provides ample clearance space for the installation of the spark plug cap, but also creates spacious and convenient conditions for manual or robotic arm operation, which helps to achieve a quick and stable connection of the spark plug cap, thereby significantly improving assembly efficiency. In addition, the first clearance section can effectively prevent the first heat dissipation mechanism from rubbing against each other during the installation of the spark plug cap and the spark plug. This prevents damage to the heat dissipation structure and reduces the adhesion of dust and impurities to the surface of the heat dissipation mechanism due to contact, which is conducive to maintaining the long-term stability of the heat dissipation performance of the first heat dissipation mechanism. On the other hand, the first clearance section also plays an important role in the disassembly process, providing operating space for the safe and convenient removal of the spark plug cap from the spark plug, improving the efficiency of cylinder inspection and maintenance.

[0006] According to an embodiment of the present invention, a cylinder head has a first heat dissipation mechanism recessed towards a second mounting hole to form a first clearance portion.

[0007] According to an embodiment of the present invention, a cylinder head includes a first clearance portion comprising two inclined portions, which are respectively disposed on both radial sides of a second mounting hole.

[0008] According to an embodiment of the present invention, a cylinder head includes a first heat dissipation mechanism comprising a plurality of first heat dissipation fins and a plurality of second heat dissipation fins, wherein the plurality of first heat dissipation fins are arranged in parallel with each other, and the plurality of second heat dissipation fins are arranged in parallel with each other.

[0009] According to an embodiment of the present invention, a cylinder head has multiple first heat dissipation fins recessed to form a first clearance portion.

[0010] According to an embodiment of the present invention, a cylinder head has multiple second heat dissipation fins that are recessed to form a second clearance portion.

[0011] According to an embodiment of the present invention, a cylinder head has a first heat dissipation fin and a second heat dissipation fin arranged parallel to each other.

[0012] According to an embodiment of the present invention, a cylinder head has a second heat dissipation mechanism provided on the periphery of the cylinder body.

[0013] According to an embodiment of the present invention, a cylinder head has a second heat dissipation mechanism arranged around the cylinder body along its periphery.

[0014] Secondly, a small aero engine according to an embodiment of the present invention utilizes the aforementioned cylinder head.

[0015] After the spark plug from the spark plug module is installed into the second mounting hole, the spark plug is also located within the space of the first clearance portion. When it is necessary to install the spark plug cap of the spark plug module to the end of the spark plug away from the cylinder block, the operator can use the first clearance portion to smoothly insert the spark plug cap and accurately align it with the end of the spark plug. The first clearance portion not only provides ample clearance space for the installation of the spark plug cap, but also creates spacious and convenient conditions for manual or robotic arm operation, which helps to achieve a quick and stable connection of the spark plug cap, thereby significantly improving assembly efficiency. In addition, the first clearance portion can effectively prevent the first heat dissipation mechanism from rubbing against each other during the installation of the spark plug cap and the spark plug. This prevents damage to the heat dissipation structure and reduces the adhesion of dust and impurities to the surface of the heat dissipation mechanism due to contact, which is conducive to maintaining the long-term stability of the heat dissipation performance of the first heat dissipation mechanism. On the other hand, the first clearance section also plays an important role in the disassembly process, providing operating space for the safe and convenient removal of the spark plug cap from the spark plug, improving the efficiency of cylinder inspection and maintenance, and thus improving the efficiency of the installation, inspection and maintenance of the entire small aero engine.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a cylinder head according to an embodiment of the present utility model; Figure 2 This is a left view of a cylinder head according to an embodiment of the present utility model; Figure 3 This is a right view of a cylinder head according to an embodiment of the present utility model; Figure 4 This is a structural schematic diagram of a cylinder head and spark plug module according to an embodiment of the present utility model.

[0018] Explanation of reference numerals in the attached figures: Cylinder block 100; First mounting hole 110; Second cooling mechanism 120; Third cooling mechanism 130; Exhaust port 140; End heat dissipation device 200; first heat dissipation mechanism 210; first heat dissipation fin 211; second heat dissipation fin 212; second mounting hole 220; first clearance part 230; inclined part 231; second clearance part 240; Spark plug module 300. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] Currently, spark plugs are commonly used as the core component for igniting the air-fuel mixture in the cylinders of small aircraft engines. To optimize ignition performance, spark plugs are typically positioned on the axial side of the cylinder head away from the piston. Simultaneously, to enhance the heat dissipation efficiency of the cylinder head, an end cooling device 200 with cooling fins is generally installed on this side. The spark plug and spark plug cap together form a spark plug module 300. The spark plug is usually directly installed on the axial end of the cylinder block 100 near the cooling fins, and references... Figure 3The spark plug protrudes at least partially from the cylinder block 100 cavity; the spark plug cap needs to pass through the dense end cooling devices 200 and connect to the end of the spark plug away from the cylinder block 100. This makes the arrangement and fixation of the spark plug cap among the dense end cooling devices 200 particularly difficult, not only limiting installation space but also causing inconvenience for daily maintenance, inspection, and replacement, thus affecting the efficiency of small aircraft engine maintenance. In actual use, the spark plug is electrically connected to the power control device via a power cord, and the power control device controls the spark plug to ignite.

[0024] Reference Figures 1 to 4 This utility model provides a cylinder head, including a cylinder body 100 and an end heat dissipation device 200. The cylinder body 100 has a first mounting hole 110 at one axial end. The end heat dissipation device 200 is connected to the axial end of the cylinder body 100. The end heat dissipation device 200 is provided with a first heat dissipation mechanism 210 and a second mounting hole 220. The second mounting hole 220 corresponds to and communicates with the first mounting hole 110 along its axial direction. The first heat dissipation mechanism 210 is arranged around the second mounting hole 220. The first heat dissipation mechanism 210 is provided with a first clearance portion 230. The second mounting hole 220 is disposed in the first clearance portion 230.

[0025] Specifically, the end heat dissipation device 200 is used for heat dissipation of the cylinder 100, and the end heat dissipation device 200 is detachably connected to one axial end of the cylinder 100. Preferably, the end heat dissipation device 200 is provided with a through hole, and the cylinder 100 is provided with a threaded hole. A screw is threaded into the threaded hole after passing through the through hole, so as to realize the detachable connection between the end heat dissipation device 200 and the cylinder 100.

[0026] Specifically, refer to Figures 1 to 4 The first mounting hole 110 and the second mounting hole 220 are used to install the spark plug in the spark plug module 300. After aligning the second mounting hole 220 with the first mounting hole 110, the end heat dissipation device 200 is installed on one axial end of the cylinder block 100. At this time, the first mounting hole 110 and the second mounting hole 220 together form a through hole structure, allowing one end of the spark plug in the spark plug module 300 to pass through the second mounting hole 220 and the first mounting hole 110 from left to right, extending into the cylinder block 100. Then, the spark plug is matched and sealed with the first mounting hole 110 for installation. Figure 3 The spark plug protrudes at least partially from the cavity of the cylinder block 100.

[0027] When it is necessary to install the spark plug cap of the spark plug module 300 to the end of the spark plug away from the cylinder block 100, the operator can use the first clearance part 230 to smoothly insert the spark plug cap and accurately fit it onto the end of the spark plug. The installed spark plug module 300 is referenced. Figure 4 .

[0028] Since the second mounting hole 220 is located within the first clearance portion 230, after the spark plug in the spark plug module 300 is installed in the second mounting hole 220, the spark plug is also located within the space of the first clearance portion 230. The operator can use the first clearance portion 230 to smoothly insert the spark plug cap and accurately fit it onto the end of the spark plug. The first clearance portion 230 not only provides ample clearance space for the installation of the spark plug cap but also creates spacious and convenient conditions for manual or robotic arm operation, helping to achieve a quick and stable connection of the spark plug cap, thereby significantly improving assembly efficiency. Furthermore, the first clearance portion 230 effectively prevents friction between the spark plug cap and the first heat dissipation mechanism 210 during the installation process, preventing damage to the heat dissipation structure and reducing dust and impurities adhering to the surface of the heat dissipation mechanism due to contact, thus helping to maintain the long-term stability of the heat dissipation performance of the first heat dissipation mechanism 210. On the other hand, the first clearance section 230 also plays an important role in the disassembly process, providing operating space for the safe and convenient removal of the spark plug cap from the spark plug, and improving the efficiency of cylinder inspection and maintenance.

[0029] According to some embodiments of this application, refer to Figure 1 The first heat dissipation mechanism 210 is recessed toward the second mounting hole 220 to form a first clearance part 230.

[0030] Furthermore, the first clearance portion 230 includes two inclined portions 231, which are respectively disposed on both radial sides of the second mounting hole 220. Specifically, the two inclined portions 231 are arranged opposite to each other to allow a worker's fingers or a robotic arm to pinch the spark plug cap for installation or removal. (See reference...) Figure 1 and Figure 4 Two inclined portions 231 are provided on both sides of the second mounting hole 220 in the front-back direction.

[0031] According to some embodiments of this application, refer to Figure 1 and Figure 4 The first heat dissipation mechanism 210 includes multiple first heat dissipation fins 211 and multiple second heat dissipation fins 212. The multiple first heat dissipation fins 211 are arranged parallel to each other, and the multiple second heat dissipation fins 212 are also arranged parallel to each other. Specifically, heat dissipation channels are formed between the multiple parallel first heat dissipation fins 211, and heat dissipation channels are also formed between the multiple parallel second heat dissipation fins 212. Specifically, there are two sets of second heat dissipation fins 212 and one set of first heat dissipation fins 211. The two sets of second heat dissipation fins 212 are respectively arranged on opposite sides in a direction perpendicular to the direction of the first heat dissipation fins 211. Figure 1 , Figure 2 and Figure 4 Two sets of second heat dissipation fins 212 are respectively disposed on the upper and lower sides of a set of first heat dissipation fins 211.

[0032] In some embodiments, the first heat dissipation fin 211 and the second heat dissipation fin 212 have the same thickness in the vertical direction. In other embodiments, the first heat dissipation fin 211 and the second heat dissipation fin 212 have different thicknesses in the vertical direction to meet specific heat dissipation requirements.

[0033] Furthermore, referring to Figure 1 and Figure 4 Multiple first heat dissipation fins 211 are recessed to form a first clearance portion 230. Specifically, each first heat dissipation fin 211 is recessed to form the first clearance portion 230, which facilitates the rapid manufacturing of the first heat dissipation fins 211 and the first clearance portion 230.

[0034] Furthermore, referring to Figure 1 and Figure 4 Multiple second heat dissipation fins 212 are recessed to form a second clearance portion 240. The second clearance portion 240 is used to avoid the placement of the spark plug cap. Specifically, each second heat dissipation fin 212 is recessed to form the second clearance portion 240, which facilitates the rapid manufacturing of the second heat dissipation fins 212 and the second clearance portion 240.

[0035] Specifically, refer to Figure 1 , Figure 2 and Figure 4 The extension direction of the second clearance portion 240 is perpendicular to the direction of the line connecting the two inclined portions 231. That is, the second clearance portion 240 extends in the vertical direction, and the two inclined portions 231 are arranged opposite each other in the front-back direction. The spark plug cap can extend in the vertical direction, and the two inclined portions 231 are arranged in the front-back direction, which makes it easier for workers to pinch the spark plug cap with their fingers or robotic arms for installation or removal, thus improving installation efficiency.

[0036] It is understood that, in some other embodiments, reference is made to... Figure 1 and Figure 4 There are two second clearance portions 240, which are positioned opposite each other on the upper and lower sides of the second mounting hole 220. This allows the spark plug cap to exit the wire either upwards or downwards.

[0037] According to some embodiments of this application, refer to Figure 1 , Figure 2 and Figure 4 The first heat dissipation fin 211 and the second heat dissipation fin 212 are arranged parallel to each other. The two heat dissipation channels formed by the first heat dissipation fin 211 and the second heat dissipation fin 212 are also parallel to each other, which is conducive to the flow of heat dissipation air and improves the heat dissipation effect.

[0038] According to some embodiments of this application, refer to Figure 1 and Figure 4A second heat dissipation mechanism 120 is provided around the cylinder block 100. Specifically, the second heat dissipation mechanism 120 also includes multiple heat dissipation fins. The second heat dissipation mechanism 120 is used to improve the heat dissipation effect of the cylinder block 100.

[0039] Furthermore, referring to Figure 1 and Figure 4 The second heat dissipation mechanism 120 is arranged around the cylinder 100 along its periphery. The second heat dissipation mechanism 120 arranged around the cylinder 100 along its periphery further improves the heat dissipation effect of the cylinder 100.

[0040] It is understood that, in some other embodiments, reference is made to... Figure 1 and Figure 4 The cylinder block 100 is also provided with an exhaust port 140 and a third heat dissipation mechanism 130 on its periphery. The third heat dissipation mechanism 130 also includes multiple heat dissipation fins. Along the axial direction of the cylinder block 100, the exhaust port 140 and the third heat dissipation mechanism 130 are located at the same position; along the periphery of the cylinder block 100, the exhaust port 140 and the third heat dissipation mechanism 130 are respectively located at different positions on the periphery of the cylinder block 100. The third heat dissipation mechanism 130 can further improve the heat dissipation effect of the cylinder block 100.

[0041] This application also provides a small aircraft engine with a cylinder head that utilizes this application, which further includes a piston, a connecting rod transmission mechanism, a power supply mechanism, a fuel control mechanism, and an intake and exhaust mechanism.

[0042] Since the second mounting hole 220 is located within the first clearance portion 230, after the spark plug in the spark plug module 300 is installed in the second mounting hole 220, the spark plug is also located within the space of the first clearance portion 230. When it is necessary to install the spark plug cap of the spark plug module 300 to the end of the spark plug away from the cylinder block 100, the operator can use the first clearance portion 230 to smoothly insert the spark plug cap and accurately align it with the end of the spark plug. The first clearance portion 230 not only provides ample clearance space for the installation of the spark plug cap, but also creates spacious and convenient conditions for manual or robotic arm operation, which helps to achieve a quick and stable connection of the spark plug cap, thereby significantly improving assembly efficiency. In addition, the setting of the first clearance portion 230 can also effectively prevent the first heat dissipation mechanism 210 from rubbing against each other during the installation of the spark plug cap and the spark plug, which not only prevents damage to the heat dissipation structure, but also reduces the adhesion of dust and impurities to the surface of the heat dissipation mechanism due to contact, which is conducive to maintaining the long-term stability of the heat dissipation performance of the first heat dissipation mechanism 210. On the other hand, the first clearance section 230 also plays an important role in the disassembly process, providing operating space for the safe and convenient removal of the spark plug cap from the spark plug, improving the efficiency of cylinder inspection and maintenance, and thus improving the efficiency of the installation, inspection and maintenance of the entire small aero engine.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cylinder head, characterized in that, include: A cylinder body (100) is provided with a first mounting hole (110) at one axial end. An end heat dissipation device (200) is connected to one axial end of the cylinder (100). The end heat dissipation device (200) is provided with a first heat dissipation mechanism (210) and a second mounting hole (220). The second mounting hole (220) corresponds to and communicates with the first mounting hole (110) along its axial direction. The first heat dissipation mechanism (210) is arranged around the second mounting hole (220). The first heat dissipation mechanism (210) is provided with a first clearance part (230). The second mounting hole (220) is located in the first clearance part (230).

2. A cylinder head according to claim 1, characterized in that, The first heat dissipation mechanism (210) is recessed toward the second mounting hole (220) to form the first clearance portion (230).

3. A cylinder head according to claim 2, characterized in that, The first clearance portion (230) includes two inclined portions (231), which are respectively disposed on the radial sides of the second mounting hole (220).

4. A cylinder head according to claim 1, characterized in that, The first heat dissipation mechanism (210) includes a plurality of first heat dissipation fins (211) and a plurality of second heat dissipation fins (212). The plurality of first heat dissipation fins (211) are arranged in parallel with each other, and the plurality of second heat dissipation fins (212) are arranged in parallel with each other.

5. A cylinder head according to claim 4, characterized in that, Multiple first heat dissipation fins (211) are recessed to form the first clearance portion (230).

6. A cylinder head according to claim 5, characterized in that, Multiple second heat dissipation fins (212) are recessed to form a second clearance portion (240).

7. A cylinder head according to claim 4, characterized in that, The first heat dissipation fin (211) and the second heat dissipation fin (212) are arranged parallel to each other.

8. A cylinder head according to claim 1, characterized in that, A second heat dissipation mechanism (120) is provided on the periphery of the cylinder (100).

9. A cylinder head according to claim 8, characterized in that, The second heat dissipation mechanism (120) is arranged around the cylinder (100) along the periphery of the cylinder (100).

10. A small aircraft engine, characterized in that, Includes a cylinder head as described in any one of claims 1 to 9.

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