Air suction disc for cooling inner duct of aero-engine

Abstract

The utility model discloses an air suction disc for cooling an inner duct of an aero-engine, which is constructed on the basis of a planar annular bottom plate, a variable cross-section air duct is arranged on the bottom plate and is made of aluminum alloy, the outer edge and the inner edge of the bottom plate are wrapped with high-temperature-resistant elastomer rubber, and three-point retaining claws are arranged on the bottom plate. The device can be tightly attached to the end face of a nozzle of the inner duct of the aero-engine in the working process, has certain self-sealing performance, can form a closed space with the inner duct, is small in flow loss, and can remarkably improve cooling efficiency. The device is integrally simple, light and easy to operate, and the risk of damage to the aero-engine and a surrounding fuselage is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to cooling equipment technical field, especially relate to an aero-engine cooling device. BACKGROUND

[0002] Civil aviation aircraft as the fastest modern traffic carrier has become one of the main traffic modes of people's travel. The gradually increasing flight volume is accompanied by the increasing pressure of aircraft maintenance. The aero-engine is the power source of civil aviation aircraft, and during the post-flight maintenance, the hole detection inspection of the engine is an important inspection method to ensure the safe operation of the civil aviation aircraft.

[0003] However, the engine just finished work is still in a high temperature state. In a high temperature environment, not only the probe of the hole detector will be damaged, but also the operator will be injured, which is not conducive to the post-flight maintenance. It often takes 3-4 hours to wait for the aero-engine to drop to the working temperature under the condition of natural cooling, which greatly prolongs the maintenance time of the civil aviation aircraft by the maintenance personnel, and such waiting time forces the civil aviation aircraft to be in an unnecessary idle state, thereby affecting the utilization rate of the civil aviation aircraft and the flight volume. How to speed up the cooling speed of the aero-engine has become a problem that we must seriously treat.

[0004] At present, when the civil aircraft operator needs to perform engine hole detection inspection, there are mainly three cooling methods besides natural cooling. The first method is engine cold start cooling. This method will affect the service life of the engine, and needs to be operated by a specially certified personnel, and needs to be approved by the tower and cleared. The whole process is complex and time-consuming, and cannot effectively improve the efficiency. The second method is to use a blowing device to blow external air into the engine from the engine air inlet to cool the engine. This method cannot achieve good cooling effect due to air flow dissipation. The third method is to use a device to extract air from the tail of the engine. The existing air extraction device usually has the disadvantages of large volume, heavy weight, complex fixing method and cumbersome operation, occupies more operating personnel, and increases the risk of damaging the engine and the fuselage. SUMMARY

[0005] The utility model discloses a purpose in at safe and effective fastly reduce aero-engine temperature and whole device portable easy operation, not easy to cause damage to engine and surrounding fuselage. To achieve the purpose, provide a kind of for aero-engine inner channel cooling Suction disc, can realize higher sealing, generate negative pressure at inner channel end, to organize normal temperature airflow from the front end of engine and suck into inner channel and take out heat, to achieve the purpose of effective cooling.

[0006] The utility model discloses a scheme for:

[0007] An air suction disc for the internal duct cooling of an aero-engine, characterized in that the air suction disc comprises a flat ring bottom plate (1), an air duct (2), an air suction port (3), a front handle (4), a rear handle (5), a fixed retaining claw (6), a movable retaining claw (7), an outer rubber ring (10) and an inner rubber ring (11).

[0008] The flat ring bottom plate (1) is provided with the air duct (2), the cross section of the air duct (2) increases from top to bottom in the rear view of the engine, so that the negative pressure covers the cross section of the internal duct outlet. The air suction port (3) is a quick connector for connecting an external air suction device. The outer edge of the bottom plate (1) is provided with the elastic outer rubber ring (10), and the outer rubber ring (10) forms a planar seal with the end surface of the internal duct nozzle of the aero-engine. The inner edge of the bottom plate (1) is provided with the elastic inner rubber ring (11), and the inner rubber ring (11) is deformed to form a seal against the tail cone of the aero-engine.

[0009] The air suction disc for the internal duct cooling of the aero-engine is characterized in that the bottom plate (1) and the air duct (2) are made of aluminum alloy.

[0010] The air suction disc for the internal duct cooling of the aero-engine is characterized in that the retaining claws are three, including one fixed retaining claw (6) and two movable retaining claws (7), and each retaining claw is uniformly spaced by 120 degrees on the flat ring bottom plate.

[0011] The above-mentioned scheme has at least one of the following beneficial effects:

[0012] 1. The utility model establishes on simple flat ring bottom plate, and the structure is simple, so that the whole is quite light, and can be easily lifted by an adult. Compared with the mode that the air suction device is pre-installed on a support and is adjusted to be aligned with the internal duct by adjusting the parameters of the support, the operation of the present scheme is more convenient.

[0013] 2. The utility model is close to the end surface of the internal duct nozzle of the engine, has small sealing difficulty, can be fully sealed, has small cooling flow loss, and increases the cooling efficiency.

[0014] 3. The utility model sets a variable cross-section air duct, maximally guarantees the ventilation volume in a narrow working space, can uniformly reduce the temperature of the whole engine, and increases the cooling efficiency.

[0015] 4. The utility model sets retaining claws, ensures that the device will not fall off from the end of the internal duct of the engine during starting and stopping, and avoids the risk of damaging the engine or the fuselage. DETAILED DESCRIPTION

[0016] The utility model will be further described in connection with the drawings and examples;

[0017] Figure 1The utility model relates to an equiaxed side schematic view of a suction disc for the convection cooling of an aero-engine inner duct,

[0018] Figure 2 The utility model relates to a bottom surface structure schematic view of a suction disc for the convection cooling of an aero-engine inner duct,

[0019] Figure 3 The utility model relates to a top view structure schematic view of a suction disc for the convection cooling of an aero-engine inner duct,

[0020] Figure 4 The utility model relates to a sealing principle schematic view of a suction disc for the convection cooling of an aero-engine inner duct,

[0021] Legend:

[0022] 1 - plane ring bottom plate, 2 - air duct, 3 - suction port, 4 - front handle, 5 - rear handle, 6 - fixed retaining claw, 7 - movable retaining claw, 8 - retaining claw handle, 9 - air inlet, 10 - outer rubber ring, 11 - inner rubber ring. Specific embodiment

[0023] This part will describe the specific embodiment of the utility model in detail, and the preferred embodiment of the utility model is shown in the attached drawings, and the function of the attached drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it can not be understood as the limitation of the protection scope of the utility model.

[0024] Reference Figure 1 、 2 , 3, the utility model embodiment provides a suction disc for the convection cooling of an aero-engine inner duct, including plane ring bottom plate 1, air duct 2, suction port 3, handle 4, 5, retaining claw 6, 7, retaining claw handle 8, outer rubber ring 10, inner rubber ring 11.

[0025] In the embodiment, a simple plane ring bottom plate 1 is arranged according to the size of the end of the engine inner duct, the air duct 2 is arranged on the plane ring bottom plate 1, and the ring-shaped air inlet 9 gradually transitions to the circular tube-shaped suction port 3 to facilitate the air extraction device to extract air.The outer circle of the plane ring bottom plate 1 is the bottom plate outer edge, and the inner circle is the bottom plate inner edge.The outer edge of the plane ring bottom plate 1 is in contact with the end surface of the inner duct nozzle by the outer rubber ring 10 to ensure sealing, and the inner edge of the plane ring bottom plate 1 is in contact with the outer wall of the tail cone to form a seal by the inner rubber ring 11, when negative pressure is generated in the air duct 2, the space formed by the device and the inner duct can be organized to form directional air flow movement.Finally, the high-temperature gas is extracted by the air extraction equipment through the suction port and discharged.

[0026] The two handles are symmetrical in the embodiment, the front handle 4 is parallel to the bottom plate 1, and the rear handle 5 forms an obvious angle with the bottom plate 1, which is convenient for the operator to carry the device and improves the structural strength of the device.

[0027] The rivet is adopted between the bottom plate 1 and the outer rubber ring 10 and the inner rubber ring 11 in the embodiment, so that the risk of falling of the parts into the aero-engine during use is reduced.

[0028] The three retaining claws are arranged as one fixed retaining claw 6 and two movable retaining claws 7 in the embodiment, the retaining claws are uniformly distributed on the plane ring bottom plate 1 at intervals of 120°, the retaining claw handle 8 can be rotated to make the retaining claw 7 contact the inner wall of the inner channel after the device is placed at the inner channel nozzle of the engine, so that the friction force is generated to make the device adhere to the inner channel of the engine and not to fall off.

[0029] Working principle: the plane ring bottom plate 1, the outer edge rubber ring 10 and the inner edge rubber ring 11 form a closed space with the inner channel. When the air suction port 3 starts to suck air, the negative pressure is formed in the air duct 2, the negative pressure difference makes the device adhere to the inner channel nozzle, and the device can suck the external air into the inner channel from the front part of the aero-engine during work, the external air passes through the core area including the combustion chamber and each hole probe, absorbs heat and is discharged from the air suction port 3 of the device, so that the temperature of each point of the inner channel is effectively reduced.

[0030] The embodiment of the utility model is described in detail above in combination with the drawings, but the utility model is not limited to the above embodiment, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A suction disc for cooling the internal ducts of an aero-engine, characterized in that... The suction plate includes a flat ring base plate (1); an air duct (2); an exhaust port (3); a front handle (4); a rear handle (5); a fixed retaining claw (6); a movable retaining claw (7); an outer rubber ring (10); and an inner rubber ring (11), wherein... The planar ring bottom plate (1) is provided with an air duct (2), and the cross section of the air duct increases from top to bottom from the rear view of the engine, so that the negative pressure can cover the inner duct outlet cross section; The exhaust vent (3) is a quick interface for connecting external exhaust equipment; The outer edge of the base plate is provided with an elastic rubber outer ring (10), and the outer ring forms a planar seal with the end face of the nozzle of the inner duct of the aero-engine. The inner edge of the base plate has an elastic rubber inner ring (11), which adaptively deforms to form a seal for the tail cone of the aircraft engine.

2. The suction disc for cooling the internal duct of an aero-engine according to claim 1, characterized in that: The base plate (1) and the air duct (2) are made of aluminum alloy.

3. The suction disc for cooling the internal duct of an aero-engine according to claim 1, characterized in that: There are three retaining claws, including one fixed retaining claw (6) and two movable retaining claws (7), and each retaining claw is evenly distributed on the planar ring bottom plate at a 120° interval.

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