High-temperature-resistant high-load full-motion control surface connecting mechanism

Abstract

The invention provides a high-temperature-resistant high-load full-motion control surface connecting mechanism which comprises an inner connecting mechanism and an outer connecting mechanism, the outer connecting mechanism comprises an outer lock washer, a temperature-resistant self-lubricating washer and a heatproof sleeve, the inner side of the outer lock washer is fixedly connected with the outer surface of a shell, the outer side of the outer lock washer is connected with the inner side of the temperature-resistant self-lubricating washer, and the heatproof sleeve is fixedly connected with the outer surface of the shell. The outer side of the temperature-resistant self-lubricating gasket is connected with the inner side of the heat-proof sleeve, and the outer side of the heat-proof sleeve is fixedly installed on the control plane. The inner connecting mechanism comprises an inner bearing, an inner ring of the inner bearing is fixedly installed outside the other end of the rudder shaft, and an outer ring of the inner bearing is fixedly connected with the inner side of the shell. The heat-proof sleeve can effectively block high-temperature airflow on the outer side of the shell, the temperature-resistant self-lubricating gasket can reduce friction resistance between the moving heat-proof sleeve and the outer lock washer, meanwhile, the high-temperature airflow can be blocked, and the problem that heat prevention and insulation and smooth movement of a full-motion control surface of a high-speed aircraft are difficult to achieve in the high-temperature and high-load environment is solved. And a technical support is provided for the design of a full-motion control surface connecting mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft structures, and in particular to a high-temperature-resistant and high-load fully-movable control surface connection mechanism. Background Art

[0002] The rudder is the main control surface of the aircraft, which can adjust the aircraft's attitude and is directly related to the flight safety and performance of the aircraft. In high-speed and long-duration flight conditions, aerodynamic heating is severe, and anti-heat insulation measures must be taken on the rudder, rudder shaft and shell to prevent heat flow from entering the shell and affecting the normal operation of temperature-sensitive equipment; at the same time, the rudder is subjected to aerodynamic forces, and there is a large friction between the rudder shaft and the shell, which affects the normal movement of the rudder and even causes the rudder to rotate and become stuck, affecting flight safety.

[0003] The patent document disclosed as CN103640689B discloses an aircraft full-movable rudder installation structure, in which the inner diameter of the first bearing is conical, one end of the conical clamp has an external thread, the rotating shaft is sequentially installed with a retaining ring, a first bearing, a conical clamp, a clamp nut, and a rudder rocker arm, the second bearing, a washer, and a stop washer are set at the end of the rotating shaft, the end of the rotating shaft is provided with a screw hole to install the end bolt, the rotating shaft and the rudder rocker arm are provided with four groups of conical through holes matching the hollow conical bushings, the hollow conical bushings are installed in the conical through holes of the rotating shaft and the rudder rocker arm, the screw passes through the hollow conical bushings at both ends and the rotating shaft through nuts to fasten the rudder rocker arm to the rotating shaft. This design reduces the gap between the movable rudder and the body and the control rocker arm, and facilitates the disassembly and assembly of the rudder, but does not meet the use requirements of the rudder to prevent heat insulation and reduce friction.

[0004] Therefore, it is necessary to develop a high-temperature and high-load resistant full-moving rudder surface connection mechanism to solve the problems of heat insulation and smooth movement of the full-moving rudder surface under high temperature and high load environment. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide a high temperature resistant and high load fully movable rudder surface connection mechanism.

[0006] The high temperature resistant and high load full-movable rudder surface connection mechanism provided by the present invention comprises an inner connection mechanism and an outer connection mechanism, wherein the outer connection mechanism is arranged between the outer side of the housing and one end of the rudder shaft connected to the rudder surface, and the inner connection mechanism is arranged between the inner side of the housing and the other end of the rudder shaft;

[0007] The external connection mechanism comprises an external stop washer, a temperature-resistant self-lubricating washer and a heat-proof sleeve, and the external stop washer, the temperature-resistant self-lubricating washer and the heat-proof sleeve are sequentially sleeved on the outside of one end of the rudder shaft connected to the rudder surface from the inside to the outside;

[0008] The inner side of the outer stop washer is fixedly connected to the outer surface of the shell, the outer side of the outer stop washer is connected to the inner side of the temperature-resistant self-lubricating washer, the outer side of the temperature-resistant self-lubricating washer is connected to the inner side of the heat-proof sleeve, and the outer side of the heat-proof sleeve is fixedly installed on the rudder surface;

[0009] The inner connection mechanism comprises an inner bearing, the inner ring of the inner bearing is fixedly mounted on the outside of the other end of the rudder shaft, and the outer ring of the inner bearing is fixedly connected to the inner side of the shell.

[0010] Preferably, the outer side of the heat protection sleeve is glued to the side of the rudder surface connected to the rudder shaft.

[0011] Preferably, one end of the rudder shaft connected to the rudder surface is provided with a radially protruding step structure, and a mounting position is formed between the outer side surface of the step structure and the rudder surface;

[0012] The heat-proof sleeve is installed in the installation position, and the inner side of the heat-proof sleeve abuts against the outer side surface of the step structure.

[0013] Preferably, the heat protection sleeve is made of glass fiber reinforced phenolic resin-based composite material or aramid fiber reinforced phenolic resin-based composite material.

[0014] Preferably, the outer surface of the shell is provided with a mounting groove, and the outer stop washer, the temperature-resistant self-lubricating washer and the heat-proof sleeve are all arranged in the mounting groove;

[0015] The inner side of the outer stop washer is fixedly connected to the groove bottom of the mounting groove.

[0016] Preferably, it also includes a stop nut, wherein the stop nut is sleeved on the threaded section of the rudder shaft located inside the housing;

[0017] The outer side of the stop nut overlaps the inner ring of the inner bearing to apply a preload.

[0018] Preferably, the external connection mechanism further comprises an external bearing, and the external bearing is arranged in a bearing seat provided at one end of the rudder shaft connected to the rudder surface;

[0019] The inner ring of the outer bearing is fixedly connected to the rudder shaft, and the outer ring of the outer bearing is fixedly connected to the outer side of the shell through an outer stop washer.

[0020] Preferably, the inner connection mechanism further comprises an inner stop washer, which is sleeved on the outside of the other end of the rudder shaft and fixedly mounted on the inner surface of the housing;

[0021] The inner stop washer is fixedly connected to the outer ring of the inner bearing.

[0022] Preferably, the inner stop washer and the outer stop washer are respectively fixedly mounted on the inner surface and the outer surface of the shell by a plurality of countersunk screws arranged along the circumference.

[0023] Preferably, the temperature-resistant self-lubricating gasket is made of graphite.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention has a simple structure and adopts the technical means of sequentially arranging an outer stop washer, a temperature-resistant self-lubricating washer and a heat-proof sleeve between the outside of the shell and the rudder shaft. The heat-proof sleeve can effectively block the high-temperature airflow outside the shell, and the temperature-resistant self-lubricating washer can avoid direct contact between the moving heat-proof sleeve and the outer stop washer, thereby reducing friction resistance and blocking the high-temperature airflow. This solves the problem that the full-moving rudder surface of a high-speed aircraft is difficult to achieve heat insulation and smooth movement under high temperature and high load environments, and provides technical support for the design of a full-moving rudder surface connection mechanism for a high-speed aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of Example 2 of the present invention.

[0029] The figure shows:

[0030] Rudder shaft 1 Outer bearing 6

[0031] Lock nut 2 External lock washer 7

[0032] Internal stop washer 3 Heat resistant self-lubricating washer 8

[0033] Inner bearing 4 Heat protection sleeve 9

[0034] Shell 5 Control surface 10 DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0036] The present invention discloses a high-temperature and high-load resistant fully movable rudder surface connection mechanism, which solves the problem that the fully movable rudder surface of a high-speed aircraft is difficult to achieve heat insulation and smooth movement under a high-temperature and high-load environment, and provides technical support for the design of a fully movable rudder surface connection mechanism for a high-speed aircraft.

[0037] The high temperature resistant and high load full-moving rudder surface connection mechanism provided by the present invention comprises a rudder surface 10, a rudder shaft 1, a heat-proof sleeve 9, a temperature-resistant self-lubricating washer 8, an outer stop washer 7, an outer bearing 6, an inner bearing 4, an inner stop washer 3, and a stop nut 8. The outer bearing 6 and the inner bearing 4 are respectively mounted on both ends of the rudder shaft 1 to distribute the aerodynamic load transmitted by the rudder surface 10 and reduce the friction resistance between the rudder shaft 1 and the housing 5; the outer stop washer 7 and the inner stop washer 3 are mounted on the housing 5 through threaded fasteners and are used to lock the outer ring of the bearing.

[0038] The stop nut 2 is installed on one side of the tiller handle. When the stop nut 2 is tightened, the axial clearance of each moving part is reduced, and the stop nut 2 and the rudder shaft 1 cooperate to lock the inner ring of the bearing; the heat-proof sleeve 9 is located at the outer end of the rudder shaft 1 to block the high-temperature airflow outside the shell 5; the temperature-resistant self-lubricating gasket 8 is placed between the heat-proof sleeve 9 and the outer stop gasket 7 to avoid direct contact between the moving heat-proof sleeve 9 and the outer stop gasket 7, thereby reducing friction resistance and blocking the high-temperature airflow.

[0039] Preferably, the stop nut 2 is installed on the thread at one end of the rudder shaft 1, and the outer envelope of the stop nut 2 is smaller than the inner diameter of the outer ring of the inner bearing 4. When tightened, the stop nut 2 has and only contacts with the inner ring of the inner bearing 4 and locks the inner ring of the bearing. When the rudder surface 10 rotates, the heat-proof sleeve 8, the rudder shaft 1, the inner ring of the outer bearing 6, the inner ring of the inner bearing 4 and the stop nut 2 are stationary relative to the rudder surface and do not affect the movement of the rudder surface.

[0040] Preferably, the heat-proof sleeve 9 is glued to the rudder shaft 1. The material of the heat-proof sleeve 9 is a glass fiber reinforced phenolic resin-based composite material or an aramid fiber reinforced phenolic resin-based composite material. The temperature-resistant self-lubricating gasket 8 has a small friction coefficient and can reduce the rotation friction of the rudder surface 1; at the same time, it has excellent high temperature resistance and can block high-temperature airflow. The material of the temperature-resistant self-lubricating gasket 8 is graphite. The rudder shaft 1 has a circular boss on the side close to the rudder surface 10, which cooperates with the stop nut 2 to lock the outer bearing 6 and the inner ring of the inner bearing 4. For a shorter rudder shaft, the outer bearing 6 can be omitted, and the rudder shaft boss cooperates with the stop nut 2 to lock the inner ring of the inner bearing 4.

[0041] Example 1

[0042] This embodiment discloses a high temperature resistant and high load fully movable rudder surface connection mechanism, which is applied to a rudder shaft 1 with a long length, such as Figure 1As shown, a deep groove ball outer bearing 6 is placed in the bearing seat outside the housing 5, and the outer stop washer 7 is screwed to the outer side of the housing 5 by 4 M4 countersunk screws to lock the outer ring of the outer bearing 6. A deep groove ball inner bearing 4 is placed in the bearing seat inside the housing 5, and the inner stop washer 3 is screwed to the inner side of the housing 5 by 4 M6 countersunk screws to lock the outer ring of the inner bearing 4. A graphite temperature-resistant self-lubricating washer 8 is placed on the surface of the outer stop washer 7. The rudder shaft 1 is glued with the aramid fiber reinforced phenolic resin-based composite material heat-resistant sleeve 9 and then fixedly connected to the rudder surface 10, passing through the temperature-resistant self-lubricating washer 8, the outer stop washer 7, the outer bearing 6, the housing 5, the inner bearing 4, and the inner stop washer 3 in sequence. The stop nut 2 is installed on the inner side of the housing 5. When the stop nut 2 is tightened, the axial clearance of each moving part is reduced, and the stop nut 2 and the rudder shaft 1 cooperate to lock the outer bearing 6 and the inner ring of the inner bearing 4. When the rudder surface 10 rotates, the heat shield 9, the rudder shaft 1, the inner ring of the outer bearing 6, the inner ring of the inner bearing 4 and the stop nut 2 are stationary relative to the rudder surface and do not affect the movement of the rudder surface. The outer bearing 6 and the inner bearing 4 reduce the friction resistance between the rudder shaft 1 and the housing 5, and the graphite temperature-resistant self-lubricating gasket 8 reduces the friction resistance between the heat shield 9 and the outer stop gasket 7; the heat shield 9 and the graphite temperature-resistant self-lubricating gasket 8 block the high-temperature airflow outside the housing 5 to prevent the heat flow from entering the housing 5 and affecting the normal operation of temperature-sensitive equipment.

[0043] Example 2

[0044] This embodiment discloses a high temperature resistant and high load fully movable rudder surface connection mechanism, which is applied to a rudder shaft 1 with a shorter length, such as Figure 2 As shown, compared with the long rudder shaft rudder surface, the short rudder shaft rudder surface can be installed without the outer bearing 6. A tapered roller bearing 4 is placed in the bearing seat inside the housing 5, and the inner stop washer 3 is screwed to the inner side of the housing 5 by 4 M6 countersunk screws to lock the outer ring of the inner bearing 4. The outer stop washer 7 is placed in the rudder shaft installation groove outside the housing 5, and the graphite temperature-resistant self-lubricating washer 8 is placed on the surface of the outer stop washer 7. The rudder shaft 1 is glued with the glass fiber reinforced phenolic resin-based composite material heat-resistant sleeve 9 and then fixedly connected to the rudder surface 10, passing through the temperature-resistant self-lubricating washer 8, the outer stop washer 7, the housing 5, the inner bearing 4, and the inner stop washer 3 in sequence. The stop nut 2 is installed on the inner side of the housing 5. When the stop nut 2 is tightened, the axial clearance of each moving part is reduced, and the stop nut 2 and the rudder shaft 1 cooperate to lock the inner ring of the inner bearing 4. When the rudder surface 10 rotates, the heat shield 9, the rudder shaft 1, the inner ring of the inner bearing 4 and the stop nut 2 are stationary relative to the rudder surface and do not affect the movement of the rudder surface. The inner bearing 4 reduces the friction resistance between the rudder shaft 1 and the housing 5, and the graphite temperature-resistant self-lubricating gasket 8 reduces the friction resistance between the heat shield 9 and the outer stop gasket 7; the heat shield 9 and the graphite temperature-resistant self-lubricating gasket 8 block the high-temperature airflow outside the housing 5, preventing the heat flow from entering the housing 5 and affecting the normal operation of temperature-sensitive equipment.

[0045] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A high temperature resistant and high load fully movable rudder surface connection mechanism, characterized in that: It comprises an inner connection mechanism and an outer connection mechanism, wherein the outer connection mechanism is arranged between the outer side of the housing (5) and one end of the rudder shaft (1) connected to the rudder surface (10), and the inner connection mechanism is arranged between the inner side of the housing (5) and the other end of the rudder shaft (1); The external connection mechanism comprises an external stop washer (7), a temperature-resistant self-lubricating washer (8) and a heat-proof sleeve (9), wherein the external stop washer (7), the temperature-resistant self-lubricating washer (8) and the heat-proof sleeve (9) are sequentially sleeved on the outside of one end of the rudder shaft (1) connected to the rudder surface (10) from the inside to the outside; The inner side of the outer stop washer (7) is fixedly connected to the outer surface of the housing (5), the outer side of the outer stop washer (7) is connected to the inner side of the temperature-resistant self-lubricating washer (8), the outer side of the temperature-resistant self-lubricating washer (8) is connected to the inner side of the heat-proof sleeve (9), and the outer side of the heat-proof sleeve (9) is fixedly mounted on the rudder surface (10); The inner connection mechanism comprises an inner bearing (4), the inner ring of the inner bearing (4) is fixedly mounted on the outside of the other end of the rudder shaft (1), and the outer ring of the inner bearing (4) is fixedly connected to the inner side of the housing (5).

2. The high temperature resistant and high load fully movable rudder surface connection mechanism according to claim 1, characterized in that: The outer side of the heat protection sleeve (9) is glued to the side of the rudder surface (10) connected to the rudder shaft (1).

3. The high temperature resistant and high load fully movable rudder surface connection mechanism according to claim 1, characterized in that: One end of the rudder shaft (1) connected to the rudder surface (10) is provided with a step structure protruding in the radial direction, and a mounting position is formed between the outer side surface of the step structure and the rudder surface (10); The heat protection sleeve (9) is installed in the installation position, and the inner side of the heat protection sleeve (9) abuts against the outer side surface of the step structure.

4. The high temperature resistant and high load fully movable rudder surface connection mechanism according to claim 1, characterized in that: The heat protection sleeve (9) is made of a glass fiber reinforced phenolic resin-based composite material or an aramid fiber reinforced phenolic resin-based composite material.

5. The high temperature and high load resistant fully movable rudder surface connection mechanism according to claim 1, characterized in that: The outer surface of the shell (5) is provided with a mounting groove, and the outer stop washer (7), the temperature-resistant self-lubricating washer (8) and the heat-proof sleeve (9) are all arranged in the mounting groove; The inner side of the outer stop washer (7) is fixedly connected to the bottom of the installation groove.

6. The high temperature resistant and high load fully movable rudder surface connection mechanism according to claim 1, characterized in that: It also comprises a stop nut (2), wherein the stop nut (2) is sleeved on a threaded section of the rudder shaft (1) located inside the housing (5); The outer side of the stop nut (2) overlaps the inner ring of the inner bearing (4) to apply a preload force.

7. The high temperature and high load resistant fully movable rudder surface connection mechanism according to claim 1, characterized in that: The external connection mechanism further comprises an external bearing (6), wherein the external bearing (6) is arranged in a bearing seat provided at one end of the rudder shaft (1) connected to the rudder surface (10); The inner ring of the outer bearing (6) is fixedly connected to the rudder shaft (1), and the outer ring of the outer bearing (6) is fixedly connected to the outer side of the housing (5) via an outer stop washer (7).

8. The high temperature resistant and high load fully movable rudder surface connection mechanism according to claim 1, characterized in that: The inner connection mechanism further comprises an inner stop washer (3), which is sleeved on the outside of the other end of the rudder shaft (1) and fixedly mounted on the inner surface of the housing (5); The inner stop washer (3) is fixedly connected to the outer ring of the inner bearing (4).

9. The high temperature resistant and high load fully movable rudder surface connection mechanism according to claim 8, characterized in that: The inner stop washer (3) and the outer stop washer (7) are respectively fixedly mounted on the inner surface and the outer surface of the housing (5) by means of a plurality of countersunk screws arranged along the circumference.

10. The high temperature resistant and high load fully movable rudder surface connection mechanism according to claim 1, characterized in that: The temperature-resistant self-lubricating gasket (8) is made of graphite.

Images