阅读说明：本技术 基于电动推拉门原理的tbcc进气道调节机构设计方法 (TBCC air inlet channel adjusting mechanism design method based on electric sliding door principle ) 是由 穆瑞 张凯瑞 林晓鹰 尤延铖 朱呈祥 于 2020-12-31 设计创作，主要内容包括：基于电动推拉门原理的TBCC进气道调节机构设计方法,涉及TBCC进气道。步骤：1)实现门体在运动过程中沿指定轨迹平移,在设计门体以及主进气道外壁时,设计出门体的平移运动导轨,使得通过电机启动齿轮齿条传动机构时,驱动门体沿导轨平移至指定位置；2)在闭合时保证通风口的密闭特性；3)在门体打开过程中实现连续调节、随时启停；4)将整体调节机构按照主进气道内壁轮廓进行设计。改变驱动件的施力方向,提高调节机构的运动性能与效率。解决基于百叶窗原理的叶片在开启时,其轴部仍存在遮挡支气道通风口并对气流产生诸多负面影响的问题。方便控制,实现在开合过程中对支气道通风面积的连续调节、随时启停,和在闭合时完全密闭。(A design method of a TBCC air inlet channel adjusting mechanism based on the principle of an electric sliding door relates to a TBCC air inlet channel. The method comprises the following steps: 1) the translation of the door body along a specified track is realized in the motion process, and when the door body and the outer wall of the main air inlet channel are designed, a translation motion guide rail of the door body is designed, so that when the gear rack transmission mechanism is started through a motor, the door body is driven to translate to a specified position along the guide rail; 2) ensuring the sealing property of the vent when closed; 3) the door body is continuously adjusted and started and stopped at any time in the opening process; 4) the integral adjusting mechanism is designed according to the contour of the inner wall of the main air inlet channel. The force application direction of the driving piece is changed, and the movement performance and efficiency of the adjusting mechanism are improved. The problem of when the blade based on shutter principle was opened, its axial part still had to shelter from the gas vent of bronchus and produce a lot of negative effects to the air current is solved. The control is convenient, the continuous adjustment of the ventilation area of the branch air passage in the opening and closing process, the starting and the stopping at any time are realized, and the sealing is completely realized when the air passage is closed.)

1. A design method of a TBCC air inlet channel adjusting mechanism based on the principle of an electric sliding door is characterized by comprising the following steps of:

1) the translation of the door body along a specified track is realized in the motion process, and when the door body and the outer wall of the main air inlet channel are designed, a translation motion guide rail of the door body is designed, so that when the gear rack transmission mechanism is started through a motor, the door body is driven to translate to a specified position along the guide rail;

2) ensuring the sealing property of the vent when closed;

3) the door body is continuously adjusted and started and stopped at any time in the opening process;

4) the integral adjusting mechanism is designed according to the contour of the inner wall of the main air inlet channel.

2. The method for designing a TBCC air inlet adjusting mechanism based on the electric sliding door principle as claimed in claim 1, wherein in step 2), the specific method for ensuring the air-tight characteristic of the air vent when closing is as follows: with the aid of the guide rail designed in the step 1), the fixing in the direction vertical to the door body is realized when the door body is completely closed; the shape of the contact surface of the door body and the inner wall of the main air inlet channel is designed to be matched with the shape of the inner wall of the main air inlet channel, so that the door body is always attached to the wall of the main air inlet channel in the whole process of movement of the door body along the guide rail, namely, the door body is attached to the inner wall of the main air inlet channel when the door body is closed.

3. The method for designing the TBCC air inlet duct adjusting mechanism based on the electric sliding door principle as claimed in claim 1, wherein in step 3), the specific method for realizing continuous adjustment and starting and stopping at any time in the opening process of the door body is as follows: the area of the vent of the branch air channel can be continuously adjusted based on the principle of an electric sliding door; based on the principle of an electric sliding door, the displacement, the speed and the acceleration can be adjusted in real time in the whole process of the movement of the door body along the guide rail, so that the door body can be continuously adjusted and started and stopped at any time.

4. The method for designing the TBCC air inlet duct adjusting mechanism based on the electric sliding door principle as claimed in claim 1, wherein in step 4), the specific method for designing the overall adjusting mechanism according to the inner wall profile of the main air inlet duct is as follows: the shape of the contact surface of the door body and the inner wall of the main air inlet channel is designed to be matched with the shape of the inner wall of the main air inlet channel, so that the sealing characteristic of the door body in the movement process is improved; the shape of the surface of the door body, which is not in contact with the inner wall of the main air inlet channel, is designed to be similar to the shape of the inner wall of the main air inlet channel; meanwhile, under the condition of meeting the requirements on strength and rigidity, the thickness of the door body is designed as thin as possible so as to reduce the negative influence of the door body on the air flow in the main air inlet channel.

Technical Field

The invention relates to the technical field of TBCC air inlets, in particular to a design method of a TBCC air inlet adjusting mechanism based on the principle of an electric sliding door.

Background

The hypersonic aircraft has become the main research direction of future aircraft research and has extremely strong strategic development significance. The hypersonic aircraft has a wide flight range, and the requirement on an engine of the hypersonic aircraft is higher in order that the hypersonic aircraft can normally fly at subsonic speed, quartic speed and supersonic speed.

However, the flight range supported by the aviation turbine engine is Mach number 0-3, the flight range supported by the sub-combustion ramjet is Mach number 2-6, and the super-combustion ramjet can support the flight range with the flight Mach number larger than 6. Therefore, any single air suction type engine cannot support normal flight of the hypersonic speed aircraft in a full speed region, so that researchers carry out extensive and intensive research on combined power.

The Combined engine comprises two main types of RBCC (rocket-Based Combined Cycle) engines and TBCC (Turbine-Based Combined Cycle) engines; the TBCC engine is developed by combining two technologies of a turbine engine (including a turbojet engine and a turbofan engine) and a ramjet engine (including a sub-combustion ramjet engine, a super-combustion ramjet engine and a dual-mode combustion ramjet engine), integrates the advantages of the turbine engine and the ramjet engine in respective applicable flight ranges, has the advantages of conventional take-off and landing, repeated use, high reliability, good low-speed performance, small technical risk and the like, and has good engineering application prospect.

The air intake duct is an important component of the TBCC engine, and how to improve the aerodynamic performance of the air intake duct and the utility under different flight conditions has been considered as one of the key technologies of the TBCC engine. Huebner L D et al studied the adjustment mechanism with the mode of rotating the lip, and this mechanism seals the intake duct in the boosting process, can improve the reliability and the stability of boosting, and the intake duct can realize the regulation of internal contraction ratio by closing to the process of opening, can make the intake duct of over-compression realize starting and there are too big scheduling problems of adjusting moment in the past scheme that single plate adjusted intake duct draught area, but it has the problem that the lip can produce certain impact force to the aircraft in the opening process. In a TBCC parallel tail nozzle adjusting mechanism embedded in a partition plate, the adjusting mechanism adjusts a branch air channel vent by using a single partition plate, so that the problems of overlarge adjusting torque and the like are solved. In the design method of the TBCC air inlet channel adjusting mechanism based on the shutter principle, when the blades are opened, the shaft part still has the problems of shielding the ventilation opening of the branch air channel and generating a plurality of negative influences on the air flow; meanwhile, when the TBCC air inlet adjusting mechanism adopting the shutter principle is adopted, the problem that the area of the vent of the branch air channel cannot be fully utilized exists. Therefore, it is necessary to provide a design method of TBCC air inlet adjusting mechanism based on the principle of electric sliding door to improve and increase the efficiency of TBCC engine during the whole flight.

Disclosure of Invention

The invention mainly aims to overcome the defects in the prior art, and provides a design method of a TBCC (TBCC) air inlet channel adjusting mechanism based on the electric sliding door principle, which solves the problems that the required moment is overlarge due to the fact that a single plate rotates around a central shaft to adjust the area of an air vent of a branch air channel, the shaft part of a blade based on the shutter principle still shields the air vent of the branch air channel and generates a plurality of negative influences on air flow when the blade is opened, is convenient to control, and realizes continuous adjustment, start and stop of the air vent area of the branch air channel at any time in the opening and closing process and complete sealing in the closing process.

The invention comprises the following steps:

1) the translation of the door body along a specified track is realized in the motion process, and when the door body and the outer wall of the main air inlet channel are designed, a translation motion guide rail of the door body is designed, so that when the gear rack transmission mechanism is started through a motor, the door body is driven to translate to a specified position along the guide rail;

2) ensuring the sealing property of the vent when closed;

3) the door body is continuously adjusted and started and stopped at any time in the opening process;

4) the integral adjusting mechanism is designed according to the contour of the inner wall of the main air inlet channel.

In step 2), the specific method for ensuring the sealing property of the vent during closing is as follows: with the aid of the guide rail designed in the step 1), the fixing in the direction vertical to the door body is realized when the door body is completely closed; the shape of the contact surface of the door body and the inner wall of the main air inlet channel is designed to be matched with the shape of the inner wall of the main air inlet channel, so that the door body is always attached to the wall of the main air inlet channel in the whole process of movement of the door body along the guide rail, namely, the door body is attached to the inner wall of the main air inlet channel when the door body is closed.

In step 3), the specific method for realizing continuous adjustment and starting and stopping at any time in the opening process of the door body comprises the following steps: the area of the vent of the branch air channel can be continuously adjusted based on the principle of an electric sliding door; based on the principle of an electric sliding door, the displacement, the speed and the acceleration can be adjusted in real time in the whole process of the movement of the door body along the guide rail, so that the door body can be continuously adjusted and started and stopped at any time.

In step 4), the specific method for designing the overall adjusting mechanism according to the contour of the inner wall of the main air inlet channel comprises the following steps: the shape of the contact surface of the door body and the inner wall of the main air inlet channel is designed to be matched with the shape of the inner wall of the main air inlet channel, so that the sealing characteristic of the door body in the movement process is improved; the shape of the surface of the door body, which is not in contact with the inner wall of the main air inlet channel, is designed to be similar to the shape of the inner wall of the main air inlet channel; meanwhile, under the condition of meeting the requirements on strength and rigidity, the thickness of the door body is designed as thin as possible so as to reduce the negative influence of the door body on the air flow in the main air inlet channel.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention optimizes the original scheme of the 'rotating door' into the scheme of the 'sliding door', so that the door body rotates around the central shaft originally, the optimization is changed into the translation along the guide rail, the force application direction of the driving piece is changed, and the motion performance and the efficiency of the adjusting mechanism are improved.

2. The invention realizes the continuous adjustment of the area of the vent hole of the branch air passage and the sealing characteristic when the vent hole is opened, closed and started at any time.

3. The shape of the contact surface of the door body and the inner pipe wall of the main air inlet channel is designed to be matched with the shape of the inner pipe wall of the main air inlet channel; the shape of the surface of the door body, which is not in contact with the inner wall of the main air inlet channel, is designed to be similar to the shape of the inner wall of the main air inlet channel; meanwhile, under the condition of meeting the requirements on strength and rigidity, the thickness of the door body is designed as thin as possible, the negative influence of the door body on the air flow in the main air inlet channel is reduced, and meanwhile, the sealing characteristic of the door body in the motion process is improved.

4. The design idea and the functional principle of the invention are suitable for the main air inlet channel with fixed geometry along the axial direction of the pipeline, such as a cylindrical pipeline, a prismatic pipeline and the like, and are independent of the shape of the air vent, namely under the condition of meeting the shape of the pipe wall of the main air inlet channel, if the air vent of the branch air channel is in an irregular shape, the scheme is still effective.

Drawings

Fig. 1 is a schematic view of a TBCC air inlet duct adjusting mechanism (half open time), an outside view (fig. 1 upper) and an inside view (fig. 1 lower) based on the principle of an electric sliding door.

Fig. 2 is a schematic diagram of the TBCC air inlet duct adjusting mechanism based on the principle of an electric sliding door, when the TBCC air inlet duct adjusting mechanism is opened, in a state of being parallel to the axial direction of the branch air duct, an inner side view (on fig. 2) and an outer side view (under fig. 2).

Fig. 3 is a schematic diagram of the TBCC air inlet adjustment mechanism based on the principle of an electric sliding door, at the time of closing, in a direction parallel to the axial direction of the branch air passage, at an inner viewing angle (in fig. 3), and at an outer viewing angle (in fig. 3).

Fig. 4 is an exploded view at half open of a TBCC air inlet adjustment mechanism based on the principle of an electric sliding door (fig. 4).

Detailed Description

The invention is further described below by means of specific embodiments.

The invention provides a TBCC air inlet channel adjusting mechanism based on the principle of an electric sliding door, and in order to make the purpose, the design scheme and the effect of the invention clearer and more clear, the attached drawings of the invention are further explained in detail. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

The invention comprises the following steps:

1) the translation of the door body along a specified track is realized in the motion process, and when the door body and the outer wall of the main air inlet channel are designed, a translation motion guide rail of the door body is designed, so that when the gear rack transmission mechanism is started through a motor, the door body is driven to translate to a specified position along the guide rail;

2) ensuring the sealing property of the vent when closed; the specific method for ensuring the sealing property of the vent during closing comprises the following steps: with the aid of the guide rail designed in the step 1), the fixing in the direction vertical to the door body is realized when the door body is completely closed; the shape of the contact surface of the door body and the inner wall of the main air inlet channel is designed to be matched with the shape of the inner wall of the main air inlet channel, so that the door body is always attached to the wall of the main air inlet channel in the whole process of movement of the door body along the guide rail, namely, the door body is attached to the inner wall of the main air inlet channel when the door body is closed.

3) The door body is continuously adjusted and started and stopped at any time in the opening process; the specific method for realizing continuous adjustment and starting and stopping at any time in the door body opening process comprises the following steps: the area of the vent of the branch air channel can be continuously adjusted based on the principle of an electric sliding door; based on the principle of an electric sliding door, the displacement, the speed and the acceleration can be adjusted in real time in the whole process of the movement of the door body along the guide rail, so that the door body can be continuously adjusted and started and stopped at any time.

4) The integral adjusting mechanism is designed according to the contour of the inner wall of the main air inlet channel. The specific method for designing the integral adjusting mechanism according to the contour of the inner wall of the main air inlet channel comprises the following steps: the shape of the contact surface of the door body and the inner wall of the main air inlet channel is designed to be matched with the shape of the inner wall of the main air inlet channel, so that the sealing characteristic of the door body in the movement process is improved; the shape of the surface of the door body, which is not in contact with the inner wall of the main air inlet channel, is designed to be similar to the shape of the inner wall of the main air inlet channel; meanwhile, under the condition of meeting the requirements on strength and rigidity, the thickness of the door body is designed as thin as possible so as to reduce the negative influence of the door body on the air flow in the main air inlet channel.

The electric sliding door adopts the principle of an electric sliding door, and the mechanism drives the transmission shaft 5 through the motor, so as to drive the gear rack transmission mechanism and further drive the door body to translate to a specified position along the guide rail. Therefore, the door body is optimized from the original rotation around the central shaft to the translation along the guide rail, and the force application direction of the driving part is changed, as shown in fig. 1, fig. 1 is a schematic diagram of the outer side visual angle of the TBCC air inlet channel adjusting mechanism based on the electric sliding door principle when the TBCC air inlet channel adjusting mechanism is half opened; fig. 1 is a schematic diagram of an inner side view angle of the TBCC air inlet duct adjusting mechanism when the TBCC air inlet duct adjusting mechanism is half opened based on the principle of an electric sliding door.

As shown in fig. 2, fig. 2 is a schematic view of an inside view parallel to an axial direction of the branch air duct when the TBCC air inlet duct adjusting mechanism based on the principle of the electric sliding door is opened, and fig. 2 is a schematic view of an outside view.

As shown in fig. 3, fig. 3 is a schematic view of an inside view parallel to an axial direction of the branch air passage when the TBCC air inlet adjustment mechanism based on the principle of the electric sliding door is closed, and fig. 3 is a schematic view of an outside view.

As shown in fig. 4, fig. 4 is an exploded view of a TBCC air inlet adjustment mechanism based on the principle of an electric sliding door when it is half opened. The mechanism consists of a door body 2, a rack 3, a transmission shaft 5, a gear 6, an outer cover 7 and a guide rail 8. Fig. 4 shows the guide rail in a partial view i and a partial view ii, and fig. 4 also includes a main air inlet duct 1 and a branch air duct 4.

The movement steps of the adjusting mechanism are as follows: when the exhaust branch air duct is closed, the motor drives the transmission shaft 5 to rotate, so that the gear 6 rotates to drive the rack 3 to move in a translation mode, the rack 3 is fixed on the door body 2, and the rack-and-pinion mechanism drives the door body 2 to move in a translation mode along the guide rail 8, and therefore opening of an exhaust branch air duct vent is achieved. When the air inlet is opened, the movement principle is the same, and the continuous adjustment and the start and stop of the branch air passage air inlet can be realized at any time.

As can be seen from fig. 2 and 3, in order to realize that the shape of the adjusting mechanism is more matched with the shape of the pipeline to ensure the sealing property of the adjusting mechanism, the shape of the surface of the door body 2, which is contacted with the inner wall of the main air inlet channel 1, is designed to be matched with the shape of the inner wall of the main air inlet channel 1; the shape of the surface of the door body 2, which is not in contact with the inner wall of the main air inlet channel 1, is designed to be similar to the shape of the inner wall of the main air inlet channel 1; meanwhile, under the condition of meeting the requirements of strength and rigidity, the thickness of the door body 2 is designed as thin as possible.

The TBCC air inlet channel adjusting mechanism based on the electric sliding door principle achieves the effect that the area of an air vent is not shielded when the TBCC air inlet channel adjusting mechanism is opened. This adjustment mechanism passes through the motor and starts gear rack drive mechanism to the drive door body is along guide rail translation to the assigned position, realizes opening and shutting of vent. The mechanism solves the problem that the required moment is too large in the scheme of adjusting the area of the vent of the branch air channel based on the rotation of the single plate around the central shaft; and the problem that when the blades based on the shutter principle are opened, the shaft parts of the blades still shield the branch air channel ventilation openings and have a plurality of negative effects on airflow is solved. The device is convenient to control, realizes continuous adjustment of the ventilation area of the branch air passage in the opening and closing process, can be started and stopped at any time, and can be completely closed in the closing process.

The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.