Air cylinder head of aero-engine

Abstract

The utility model discloses an aero-engine cylinder head which comprises a cylinder head body, two sparking plug mounting holes are symmetrically formed in the middle of the cylinder head body, two fuel gas nozzle mounting holes are formed in the cylinder head body, and the two sparking plug mounting holes are symmetrically formed in the middle of the cylinder head body. And the two fuel gas nozzle mounting holes are symmetrically arranged relative to a symmetric plane between the two spark plug mounting holes. According to the scheme, the problem that in the prior art, a cylinder head cannot adapt to a double-ignition and double-oil-injection aero-engine is solved.

Description

TECHNICAL FIELD

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

[0002] The main function of the aero-engine cylinder head is to carry spark plugs, jet nozzles or oil nozzles. The existing aero-engine cylinder head generally only has one spark plug mounting hole and one jet nozzle mounting hole, thereby realizing single ignition and single oil injection functions. In a good working environment, the design of single ignition and single oil injection generally meets the working needs of the engine. However, when the aero-engine works in a harsh environment such as high altitude and low temperature, abnormal ignition and insufficient oil injection may cause insufficient overall power of the engine or abnormal stop of the engine.

[0003] Chinese patent document CN216044067U discloses a heavy oil unmanned aerial vehicle engine and a cylinder head provided with two spark plugs, which are symmetrically arranged on the cylinder head. The prior art scheme increases the ignition energy by arranging two spark plugs on the cylinder head, thereby reducing the starting time of the heavy oil unmanned aerial vehicle engine.

[0004] Chinese patent document CN205876529U discloses a crankcase scavenging two-stroke water-cooled engine cylinder and a cylinder head provided with two spark plug mounting holes. The prior art scheme realizes the function of double ignition.

[0005] Chinese patent document CN216811991U discloses an engine for an aircraft and a throttle valve, which comprises: a throttle valve body provided with an inner cavity and comprising an inlet end and an outlet end in communication with the inner cavity; a plurality of oil injection nozzles, each of which is arranged on the throttle valve body and can inject oil into the inner cavity of the throttle valve body; an air filter arranged on the throttle valve body and in communication with the inlet end; a damper which can rotate in the inner cavity to communicate or block the inlet end and the outlet end; and a damper driving part connected with the damper and controlling the rotation of the damper.

[0006] The cylinder head in the above-mentioned prior art is mainly suitable for aero-engines with double ignition and single oil injection. Moreover, the double oil injection aero-engine in the prior art mainly realizes the function of double oil injection by arranging two oil injection nozzles at the throttle valve. However, the pipeline of the throttle valve is relatively small, and arranging two oil injection nozzles simultaneously greatly increases the processing difficulty and affects the product quality. UTILITY MODEL CONTENTS

[0007] The utility model aims to provide an aero-engine cylinder head to solve the problem that the cylinder head in the prior art cannot adapt to aero-engines with double ignition and double oil injection.

[0008] To achieve the above object, the basic scheme of the utility model provides an aero-engine cylinder head, including cylinder head body, the middle part of the cylinder head body is provided with two spark plug mounting holes, the cylinder head body is provided with fuel gas nozzle mounting hole, the fuel gas nozzle mounting hole is provided with two, two the fuel gas nozzle mounting hole is symmetrically arranged with the symmetry plane between two spark plug mounting holes.

[0009] The beneficial effects of the basic scheme are that: by setting two fuel gas nozzle mounting holes on the cylinder head, and cooperating with two spark plug mounting holes, the cylinder head is used to support two spark plugs and two fuel gas nozzles to realize the function of double ignition and double oil injection of the aero-engine, compared with setting two oil nozzles on the throttle valve in the prior art, the difficulty of machining two fuel gas nozzle mounting holes on the cylinder head is lower, which is beneficial to ensure product quality and reduce maintenance cost in later period.

[0010] Preferably, each spark plug mounting hole is arranged towards the area between the two fuel gas nozzle mounting holes. With such an arrangement, after installing spark plugs in the two spark plug mounting holes respectively, each spark plug can perform ignition operation on the fuel gas sprayed by the two fuel gas nozzles, which is beneficial to improve ignition reliability.

[0011] Preferably, the two fuel gas nozzle mounting holes and the two spark plug mounting holes are in rectangular distribution. With such an arrangement, positioning and machining operation of the four mounting holes is facilitated, which is beneficial to further reduce machining difficulty.

[0012] Preferably, three oil injector skeleton interfaces are arranged around the two fuel gas nozzle mounting holes on the cylinder head body, and the three oil injector skeleton interfaces are in triangular distribution. With such an arrangement, installation and positioning operation of the oil injector skeleton during later assembly is facilitated, which improves assembly convenience. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the front view of the utility model aero-engine cylinder head embodiment;

[0014] Figure 2 It is Figure 1 rear view. DETAILED DESCRIPTION

[0015] The following will be further described in detail through specific embodiments:

[0016] The reference signs in the drawings of the specification include: cylinder head body 1, fuel gas nozzle mounting hole 2, oil injector skeleton interface 3, spark plug mounting hole 4.

[0017] The embodiment is basically as shown in the accompanying Figure 1 and Figure 2As shown: an aero-engine cylinder head, including cylinder head body 1, the middle part of cylinder head body 1 is provided with two spark plug mounting holes 4. The cylinder head body 1 is provided with fuel gas nozzle mounting hole 2. In the embodiment, the fuel gas nozzle mounting hole 2 is provided with two, and the two fuel gas nozzle mounting holes 2 are symmetrically arranged with the symmetry plane between the two spark plug mounting holes 4.

[0018] In the embodiment, each spark plug mounting hole 4 is preferably arranged towards the region between the two fuel gas nozzle mounting holes 2, so that the spark plug mounted in each spark plug mounting hole 4 can ignite the fuel gas sprayed at the two fuel gas nozzle mounting holes 2, thereby improving the ignition efficiency.

[0019] In the embodiment, the two fuel gas nozzle mounting holes 2 and the two spark plug mounting holes 4 are in rectangular distribution, thereby facilitating the positioning and machining operation of the four mounting holes.

[0020] In the embodiment, three oil injector skeleton interfaces 3 are arranged around the periphery of the two fuel gas nozzle mounting holes 2 on the cylinder head body 1, and the three oil injector skeleton interfaces 3 are in triangular distribution. With such an arrangement, the installation and positioning operation during the later assembly of the oil injector skeleton is facilitated, thereby improving the assembly convenience.

[0021] In use, by arranging two fuel gas nozzle mounting holes 2 on the cylinder head and cooperating with the two spark plug mounting holes 4, the cylinder head supports the two spark plugs and the two fuel gas nozzles to realize the functions of double ignition and double oil injection of the aero-engine. Compared with the prior art of arranging two oil injection nozzles on the throttle valve, the difficulty of machining the two fuel gas nozzle mounting holes 2 on the cylinder head is lower, which is conducive to ensuring the product quality and reducing the later maintenance cost.

[0022] 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 noted 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 considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application.

Claims

1. An aeroengine cylinder head comprising a cylinder head body, a middle portion of the cylinder head body being symmetrically provided with two spark plug mounting holes, the cylinder head body being provided with a fuel gas nozzle mounting hole, characterized in that: The fuel gas nozzle mounting holes are provided with two, two said fuel gas nozzle mounting holes are symmetrically arranged with the symmetry plane between two spark plug mounting holes.

2. An aeroengine gas cylinder head as claimed in claim 1, characterised in that: Each said spark plug mounting hole is arranged towards the area between two fuel gas nozzle mounting holes.

3. An aeroengine gas cylinder head as claimed in claim 2, characterised in that: Two said fuel gas nozzle mounting holes are distributed in a rectangular shape with two spark plug mounting holes.

4. An aeroengine gas cylinder head according to claim 3, characterised in that: Three injector skeleton interfaces are arranged around the periphery of two fuel gas nozzle mounting holes on the cylinder head body, and the three injector skeleton interfaces are distributed in a triangular shape.

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