A fluidic device mounting structure

Abstract

The application belongs to the technical field of aero-engines, and particularly relates to a jet device mounting structure. The application provides a jet device mounting structure, which comprises a jet device including a fixed mounting end fixedly connected with a wall surface of an air inlet channel and an auxiliary mounting end flexibly connected with another wall surface of the air inlet channel; the other wall surface of the air inlet channel has a boss at the auxiliary mounting end, a spring is sleeved on the boss, the auxiliary mounting end of the jet device has a positioning hole accommodating the spring, and the spring is installed in a compressed state between the positioning hole and the boss. The spring 2 of the application is in a compressed state, and a certain initial force is given to the jet device. When the jet device works, the jet device can freely contract, so that excessive stress caused by uncoordinated thermal expansion is avoided.

Description

Technical Field

[0001] This application belongs to the field of aero-engine technology, and specifically relates to a jet device mounting structure. Background Technology

[0002] The background of this invention is the design of a jet atomization cooling structure under high temperature conditions.

[0003] When an engine operates at high temperatures, there is a risk of insufficient temperature rise margin, resulting in inadequate thrust. An effective solution is to inject coolant into the engine intake manifold to pre-cool the air to a temperature suitable for engine operation. This requires designing a jetting device within the engine intake manifold to achieve this function while ensuring high reliability.

[0004] When the engine is running, the jet is fixed to the intake duct wall. The jet mainly bears the thermal stress caused by thermal deformation incompatibility, the aerodynamic force caused by the impact of incoming gas, and the vibration stress caused by engine vibration. It requires a reliable fixed structure for support to prevent destructive failures.

[0005] Existing jet ejectors are often fixed by means of fixing both ends or fixing one end and cantilevering the other, which are all unreliable.

[0006] The air intake expands due to the heat of the incoming hot air, increasing its diameter or height; while the jet injector contracts due to the cooling caused by the delivery and spraying of coolant. If a structure with fixed ends is used, the jet injector will be subjected to enormous tensile force and is easily damaged. Summary of the Invention

[0007] To address the aforementioned problems, this application provides a jet device mounting structure, comprising: The jet device includes a fixed mounting end that is fixedly connected to the wall of the air intake and an auxiliary mounting end that is flexibly connected across the air intake and to the other wall of the air intake. The other wall of the air intake has a boss at the auxiliary mounting end, and a spring is fitted on the boss. The auxiliary mounting end of the jet device has a positioning hole to accommodate the spring, and the spring is installed in a compressed state between the positioning hole and the boss.

[0008] Preferably, the boss has a mounting groove formed by a recess in the other wall of the air intake, the total height of the boss and the spring is less than the height of the mounting groove, and part of the jet device is placed in the mounting groove.

[0009] Preferably, the mounting groove includes at least two bosses distributed along the airflow direction.

[0010] Preferably, a wear-resistant plate is provided between the contact surface of the spring and the positioning hole, and the wear-resistant plate is clearance-fitted with the positioning hole.

[0011] Preferably, the boss includes a bottom mounting section and a top guide section, the wall of the mounting section having a helical groove into which the spring is screwed, and the spring is fixed to the boss by screwing into the helical groove.

[0012] Preferably, the boss includes a cylindrical block and a bolt. The bottom end of the cylindrical block has an internal threaded hole. The bolt extends from the outside of the air intake through the wall of the air intake to the inside of the air intake and is threadedly connected to the cylindrical block.

[0013] Preferably, one end of the spring is fixedly connected to the positioning hole and the other end overlaps with the boss, or one end of the spring overlaps with the positioning hole and the other end is fixedly connected to the boss.

[0014] Preferably, the wear-resistant sheet is coaxially welded to the spring.

[0015] The advantages of this application include: the spring is in a compressed state, providing the ejector with a certain initial force. When the ejector is working, it can freely contract, avoiding excessive stress due to thermal expansion mismatch; the spring will provide some auxiliary support, reducing the amplitude of the ejector's vibration with the engine; when the ejector bends or twists, the spring will deform further, providing a reverse force to the ejector and reducing the degree of deformation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation structure of the jet device according to a preferred embodiment of this application; Figure 2 yes Figure 1 Schematic diagram of the jet device installation structure in the aa direction; Figure 3 This is a partial structural diagram of the auxiliary mounting end of a preferred embodiment of the jet device mounting structure of this application; Figure 4 This application presents a preferred embodiment of a jet device in a schematic diagram of its external shape changing to the limit state. Figure 5 This is a partial structural diagram of the auxiliary installation end of the jet device in a preferred embodiment of this application, showing the device in a state of extreme shape change. Figure 6 This is a schematic diagram of the inward deformation limit state of the jet device according to a preferred embodiment of this application; Figure 7 This is a partial structural diagram of the auxiliary installation end of the jet device in the inward deformation limit state according to a preferred embodiment of this application. Figure 8 This is a schematic diagram of the traditional jet device's two ends fixing method; Figure 9 This is a schematic diagram of a traditional jet device with one end fixed and the other end cantilevered. Detailed Implementation

[0017] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0018] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., used in this application description to indicate relative direction or positional relationship are used only to indicate relative orientation or positional relationship, and do not imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, and therefore should not be construed as a limitation on this application. The terms "first," "second," "third," and similar terms used in this application description are used only for descriptive purposes to distinguish different components, and should not be construed as indicating or implying relative importance. The terms "a," "one," or "the," etc., used in this application description should not be construed as an absolute limitation on quantity, but should be construed as indicating the existence of at least one. The terms "including," "comprising," etc., used in this application description mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0019] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, terms such as “installation,” “connection,” and “linkage” used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0020] To address the aforementioned problems, this application provides a jet device mounting structure, comprising: The jet device includes a fixed mounting end that is fixedly connected to the wall of the air intake C, and an auxiliary mounting end that is flexibly connected across the air intake C to the other wall of the air intake C; The other wall of the air intake C has a boss 1 at the auxiliary mounting end, and a spring 2 is fitted on the boss 1. The auxiliary mounting end of the jet device has a positioning hole 4 to accommodate the spring 2. The spring 2 is installed in a compressed state between the positioning hole and the boss 1.

[0021] In some alternative embodiments, the boss 1 has a mounting groove B formed by a recess in the other wall of the air intake C. The total height of the boss 1 and the spring 2 is less than the height of the mounting groove B. Part of the jet device is placed in the mounting groove B. The outer diameter of the spring 2 is 1-2 mm smaller than the diameter of the positioning hole 4.

[0022] In some alternative embodiments, the mounting groove B includes at least two bosses 1 distributed along the airflow direction.

[0023] In some alternative embodiments, a wear-resistant plate 3 is provided between the contact surface of the spring 2 and the positioning hole 4. The wear-resistant plate 3 is clearance-fitted with the positioning hole 4 or the wear-resistant plate 3 is coaxially welded to the spring 2. The diameter of the wear-resistant plate 3 is the same as the inner diameter of the positioning hole 4. There is a 2-5mm gap between the bottom end face of the jet injector and the bottom end face of the mounting base B.

[0024] In some alternative embodiments, the boss 1 includes a bottom mounting section and a top guide section, the wall of which has a helical groove into which the spring 2 is screwed, and the spring 2 is fixed to the boss 1 by screwing into the helical groove.

[0025] In some alternative embodiments, the boss 1 includes a cylindrical block and a bolt, the bottom end of the cylindrical block having an internal threaded hole, and the bolt extending from the outside of the air intake C through the wall of the air intake C to the inside of the air intake C and threadedly connected to the cylindrical block. In addition, one end of the spring can be welded to the ejector; the other end can be welded to a threaded cylindrical block. When fixed, one end of the ejector is secured to the air intake C with bolts, and the other end is connected to the cylindrical block and the mounting base with bolts. This is equivalent to a rigid connection at one end and a flexible connection at the other, which reduces stress caused by thermal expansion mismatch and also limits deformation and vibration.

[0026] In some alternative embodiments, one end of the spring 2 is fixedly connected to the positioning hole 4 and the other end overlaps with the boss 1, or one end of the spring 2 overlaps with the positioning hole 4 and the other end is fixedly connected to the boss 1.

[0027] The advantages of this application include: the spring 2 is in a compressed state, providing the ejector with a certain initial force. When the ejector is working, it can freely contract, avoiding excessive stress due to thermal expansion incompatibility; the spring 2 will provide some auxiliary support, reducing the amplitude of the ejector's vibration with the engine; when the ejector bends or twists, the spring 2 will deform further, providing a reverse force to the ejector and reducing the degree of deformation.

[0028] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A jet device mounting structure, characterized in that, include: The jet device (A) includes a fixed mounting end that is fixedly connected to the wall of the air intake (C) and an auxiliary mounting end that is flexibly connected across the air intake (C) and to the other wall of the air intake (C); The other wall of the air intake (C) has a boss (1) at the auxiliary mounting end, on which a spring (2) is fitted. The auxiliary mounting end of the jet device (A) has a positioning hole (4) for accommodating the spring (2), and the spring (2) is installed in a compressed state between the positioning hole and the boss (1). The boss (1) has a mounting groove (B) formed by the recess of the other wall of the air intake (C). The total height of the boss (1) and the spring (2) is less than the height of the mounting groove (B). Part of the jet device (A) is placed in the mounting groove (B).

2. The jet device mounting structure as described in claim 1, characterized in that, The mounting groove (B) includes at least two bosses (1) distributed along the airflow direction.

3. The jet device mounting structure as described in claim 1, characterized in that, There is a wear-resistant plate (3) between the contact surface of the spring (2) and the positioning hole (4), and the wear-resistant plate (3) and the positioning hole (4) are in clearance fit.

4. The jet device mounting structure as described in claim 1, characterized in that, The boss (1) includes a mounting section at the bottom and a guide section at the top. The wall of the mounting section has a spiral groove into which the spring (2) is screwed. The spring (2) is fixed to the boss (1) by screwing into the spiral groove.

5. The jet device mounting structure as described in claim 1, characterized in that, The boss (1) includes a cylindrical block and a bolt. The bottom end of the cylindrical block has an internal threaded hole. The bolt extends from the outside of the air intake (C) through the wall of the air intake (C) to the inside of the air intake (C) and is threadedly connected to the cylindrical block.

6. The jet device mounting structure as described in claim 1, characterized in that, One end of the spring (2) is fixedly connected to the positioning hole (4), and the other end overlaps with the boss (1), or one end of the spring (2) overlaps with the positioning hole (4), and the other end is fixedly connected to the boss (1).

7. The jet device mounting structure as described in claim 3, characterized in that, The wear-resistant sheet (3) is coaxially welded with the spring (2).

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