Aero-engine

Abstract

The utility model discloses an aero-engine which comprises a cylinder head, the cylinder head is connected with a spark plug, one end, located on the outer side of the cylinder head, of the spark plug is connected with a high-voltage damping wire shielding cap, the cylinder head is detachably connected with an auxiliary fixing piece, and the auxiliary fixing piece is connected with the high-voltage damping wire shielding cap in a hooking mode. According to the scheme, the problem that in the prior art, poor contact is prone to occurring between the spark plug and the high-voltage damping wire of an aero-engine is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an aero-engine. BACKGROUND

[0002] When the aero-engine is working, the fuel in the cylinder combustion chamber is mainly ignited by the spark plug fixed on the cylinder head. The part of the spark plug located outside the cylinder head is connected with a high-pressure damping line. In actual design, the end of the high-pressure damping line is provided with a shielding cap. In the prior art, a clasp spring type connection structure or a clamping type connection structure is mainly used to connect and fix the shielding cap and the spark plug, so as to realize the connection and fixation between the high-pressure damping line and the spark plug. However, in actual use, the high-pressure damping line and the spark plug are prone to poor contact with each other as the use time of the aero-engine accumulates. In particular, when the cylinder body of the aero-engine is horizontally and transversely arranged and the spark plug is downwardly and obliquely arranged, the problem of poor contact between the high-pressure damping line and the spark plug is particularly prominent.

[0003] Chinese patent document CN220869558U discloses a spark plug anti-disengagement device suitable for a piston type two-stroke aero-engine, which comprises an engine cylinder body. The top of the engine cylinder body is provided with a spark plug high-pressure cap, and the spark plug high-pressure cap is provided with a spark plug. Two anti-disengagement buckle fixing screw holes are formed in the top of the engine cylinder body, and the two anti-disengagement buckle fixing screw holes are located on the two sides of the spark plug high-pressure cap, respectively. Each of the two anti-disengagement buckle fixing screw holes is threadedly connected with a double-headed screw, and the outer surface of the end of each double-headed screw away from the engine cylinder body is movably sleeved with an anti-disengagement buckle. The two ends of the anti-disengagement buckle are both provided with a fixing hole. The beneficial effects of the prior art are as follows: the spark plug anti-disengagement device suitable for the piston type two-stroke aero-engine is provided with two anti-disengagement buckle fixing screw holes on the engine cylinder body, and the two anti-disengagement buckle fixing screw holes are fixed together with the two double-headed screws. The anti-disengagement buckle is placed above the spark plug high-pressure cap, and the two fixing holes on the anti-disengagement buckle are respectively threaded on the two double-headed screws and locked by M5 lock nuts. At this time, the spark plug high-pressure cap can be reliably crimped below the anti-disengagement buckle, thereby playing a role of preventing the spark plug high-pressure cap from disengaging and avoiding the risk of loosening of the spark plug high-pressure cap.

[0004] Although the above-mentioned prior art solution solves the problem of loosening of the spark plug high-pressure cap of the aero-engine, the technical means adopted requires the anti-disengagement buckle to be connected with two M5 lock nuts and double-headed screws, so as to press the anti-disengagement buckle against the spark plug high-pressure cap. In this way, the engine cylinder body needs to have a relatively large space for installing the anti-disengagement buckle, and the volume of the anti-disengagement buckle also needs to be designed to be relatively large to press the spark plug high-pressure cap. Such a setting not only increases the difficulty of setting the spark plug high-pressure cap, but also greatly increases the weight of the aero-engine. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of different from prior art's selectable spark plug and high pressure damping wire between easily occurring contact bad aviation engine.

[0006] To achieve the above object, the basic scheme of the utility model provides an aviation engine, including cylinder head, the cylinder head is connected with spark plug, the spark plug is connected with high pressure damping wire shield cap at one end outside cylinder head, the cylinder head is detachably connected with auxiliary fixing part, and the auxiliary fixing part is hooked connection with high pressure damping wire shield cap.

[0007] The beneficial effects of the basic scheme are that: high pressure damping wire shield cap is fixed by the mode that cylinder head is hooked connection with high pressure damping wire shield cap by auxiliary fixing part, the installation space required by auxiliary fixing part is small, so that the aviation engine with smaller cylinder head space can also prevent the problem that spark plug and high pressure damping wire are easily contacted and bad, and further provide a selectable technical means different from prior art.

[0008] Preferably, the auxiliary fixing part is hooked connection with the end of high pressure damping wire shield cap. With such arrangement, connection is made at the end of high pressure damping wire shield cap with auxiliary fixing part, which can reduce the adverse effects of the force of hooked connection on the overall structure of high pressure damping wire shield cap.

[0009] Preferably, the auxiliary fixing part is provided with hooking part, and the end of high pressure damping wire shield cap close to cylinder body is provided with hanging hole matched with hooking part. With such arrangement, hooked connection is realized by the cooperation of hooking part and hanging hole, so that hanging hole can be machined on the basis of the structure of existing high pressure damping wire shield cap, without the need to make great adjustment to the structure of existing high pressure damping wire shield cap, which is conducive to reducing cost. At the same time, the volume of auxiliary fixing part can be small, so as to reduce the impact on the weight of aviation engine.

[0010] Preferably, the auxiliary fixing part is connected with cylinder head by bolt. With such arrangement, the assembly operation of auxiliary fixing part is facilitated.

[0011] Preferably, the auxiliary fixing member is made of a wire, and the auxiliary fixing member is provided with a connecting hole matched with the bolt and formed by helically bending the wire by at least 540 degrees. With such an arrangement, the auxiliary fixing member can be made by bending the wire, so as to reduce the weight of the auxiliary fixing member as much as possible, thereby reducing the influence on the weight of the aero-engine; meanwhile, the connecting hole matched with the bolt is formed by helically bending the wire by at least 540 degrees, so as to utilize the spring-like elastic force formed after the wire is helically bent to assist in enhancing the connecting effect between the bolt and the cylinder head, thereby achieving the anti-loosening effect of the bolt in the vibration environment, and improving the reliability of the auxiliary fixing member in fixing the high-pressure damping wire shielding cap.

[0012] Preferably, the auxiliary fixing member is provided with two hooking parts. With such an arrangement, the fixing effect of the auxiliary fixing member on the high-pressure damping wire shielding cap can be further improved.

[0013] The utility model has the following beneficial effects:

[0014] 1. By adopting the utility model, the problem of poor contact between the spark plug and the high-pressure damping wire can be effectively prevented even when the cylinder head space is small, and the reliability of the aero-engine is improved.

[0015] 2. Compared with the pressing and fixing mode of the anti-loosening buckle in the prior art, the hooking connection mode adopted by the utility model can greatly reduce the volume and weight of the auxiliary fixing member, thereby reducing the influence of the auxiliary fixing member on the weight of the aero-engine. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of an embodiment of the utility model of an aero-engine;

[0017] Figure 2 is Figure 1 is a schematic view of the cooperation between the auxiliary fixing member and the high-pressure damping wire shielding cap;

[0018] Figure 3 is Figure 2 is a top view. DETAILED DESCRIPTION

[0019] The following will be further described in detail through specific embodiments:

[0020] The reference signs in the drawings of the specification include: cylinder head 1, bolt 2, auxiliary fixing member 3, hooking part 31, connecting hole 32, high-pressure damping wire shielding cap 4, and spark plug 5.

[0021] The embodiment is basically as shown in the accompanying drawings Figure 1 , Figure 2 and Figure 3The aero-engine comprises a cylinder head 1, a spark plug 5 connected to the cylinder head 1, and a high-voltage damping wire shielding cap 4 connected to one end of the spark plug 5 outside the cylinder head 1. In the embodiment, the cylinder head 1 is horizontally arranged, and the spark plug 5 is arranged at the lower side of the end of the cylinder head 1 in an inclined manner. The cylinder head 1 is detachably connected with an auxiliary fixing member 3, and the auxiliary fixing member 3 is hookingly connected with the high-voltage damping wire shielding cap 4.

[0022] In the embodiment, the auxiliary fixing member 3 is hookingly connected with the end of the high-voltage damping wire shielding cap 4. Specifically, the auxiliary fixing member 3 is provided with a hooking part 31, and the high-voltage damping wire shielding cap 4 is provided with a hanging hole matched with the hooking part 31 at the end close to the cylinder body, and the auxiliary fixing member 3 hooks the high-voltage damping wire shielding cap 4 by passing through the hanging hole through the hooking part 31.

[0023] In the embodiment, the auxiliary fixing member 3 is connected with the cylinder head 1 through a bolt 2. Specifically, the cylinder head 1 is provided with a threaded hole matched with the bolt 2, and the auxiliary fixing member 3 is provided with a connecting hole 32 through which the bolt 2 passes to be connected with the cylinder body, so as to realize the connection and fixation of the auxiliary fixing member 3 with the cylinder body.

[0024] In the embodiment, the auxiliary fixing member 3 is made of a metal wire, and the connecting hole 32 matched with the bolt 2 is formed by at least spiral bending the metal wire by 540°, so that when the bolt 2 passes through the connecting hole 32 and presses the auxiliary fixing member 3 on the cylinder head 1, the spiral bending part formed around the connecting hole 32 of the auxiliary fixing member 3 forms a structure similar to a spring, so that the auxiliary fixing member 3 exerts a greater elastic force on the bolt 2, thereby enhancing the connection between the bolt 2 and the cylinder head 1 under the vibration of the engine, so as to achieve the effect of preventing the bolt 2 from loosening. In the embodiment, the hooking part 31 of the auxiliary fixing member 3 is provided with two parts, which are formed by bending the two ends of the metal wire. Correspondingly, the hanging hole of the high-voltage damping wire shielding cap 4 is also provided with two parts, so that the hanging hole and the hooking part 31 are connected one by one.

[0025] The scheme of the present application can effectively prevent the spark plug 5 from being in poor contact with the high-voltage damping wire under the condition that the space of the cylinder head 1 is small, and improve the reliability of the aero-engine.

[0026] The above is only an embodiment of the present application, and the well-known specific structures and properties in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be regarded as the protection scope of the present application, and these will not affect the effect and practicability of the present application.

Claims

1. An aero-engine comprising a cylinder head, a spark plug connected to the cylinder head, a high-voltage damping wire shield cap connected to one end of the spark plug outside the cylinder head, and an auxiliary fixing member detachably connected to the cylinder head. The auxiliary fixing member is hook-connected with the high-pressure damping wire shielding cap.

2. An aeroengine as claimed in claim 1, characterised in that: The auxiliary fixing member is hook-connected with the end of the high-pressure damping wire shielding cap.

3. An aeroengine as claimed in claim 2, characterised in that: The auxiliary fixing member is provided with a hooking part, and the high-pressure damping wire shielding cap is provided with a hanging hole matched with the hooking part at one end close to the cylinder body.

4. An aircraft engine according to claim 1, 2 or 3, characterized in that: The auxiliary fixing member is connected with the cylinder head through a bolt.

5. An aeroengine as claimed in claim 4, characterised in that: The auxiliary fixing member is made of a metal wire, and the auxiliary fixing member is provided with a connecting hole matched with the bolt, which is formed by at least spiral bending the metal wire by 540 degrees.

6. An aeroengine as claimed in claim 5, characterised in that: The auxiliary fixing member is provided with two hooking parts.

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