Horizontal Throat Block Driving Device of Semi-flexible Nozzle Guide Rail in Continuous Transonic Wind Tunnel

Abstract

The invention discloses a horizontal type throat block driving device of a semi-flexible nozzle guide rail of a continuous transonic wind tunnel, which realizes precise control of the position and posture of the nozzle section throat block. It includes a drive unit composed of a motor, a reducer, a screw, a slide table, a guide rail, and a slider arranged horizontally; an execution unit composed of a two-force rod and a joint bearing; and a support unit composed of a support platform. The invention has simple and compact structure; each drive is controlled independently, and the overall drive device has high stability; in the case of limited vertical travel, the spare space in the horizontal direction can be used to realize pose adjustment; the dislocation arrangement of guide rails realizes Space reuse saves space in the horizontal direction; all drive units are above the support platform, which greatly facilitates mechanism maintenance; six degrees of freedom can be adjusted to resist the influence of the lateral force of the throat block.

Description

technical field

[0001] The invention relates to a continuous transonic wind tunnel nozzle section semi-flexible wall guide rail horizontal throat block drive device, which belongs to the field of special equipment for wind tunnel testing, and is a semi-flexible device for precise adjustment of different Mach numbers of the nozzle section in the wind tunnel. Horizontal throat block drive for wall nozzle guides. Background technique

[0002] The wind tunnel is an important test device used to verify whether the aerodynamic shape of various types of aerospace vehicles and high-speed EMUs is reasonable. Its main principle is to simulate the external gas flow field characteristics (Mach number, Reynolds number, etc.) number, Prandtl number, etc.), and make a series of evaluations on the measured parameters of the tested object in the simulated flow field, so as to realize the prediction of its characteristics under real working conditions. Wind tunnels can be divided into subson...

Examples

Embodiment 1

[0028]The support platform (5) is a flat plate with slots placed horizontally, used for installing and precisely positioning the guide rail (702), and can fully bear the force of the guide rail (702) on it during work. Good rigidity is ensured by designing its structure, which will ensure the pose forming accuracy of the final throat block (1). Several drive units (7) are housed on the support platform (5), and each drive unit (7) includes: a servo motor (705) is connected with a right-angle reducer (706) to reduce the output speed of the motor, and the servo motor (705 ) and the reducer (706) are horizontally installed on the support platform (5) through the reducer support (709); The leading screw (703) is installed on the top of the support platform (5) by the leading screw support (701), the output of the reducer (706) drives the leading screw (703) to rotate through the shaft coupling (704), and the leading screw nut (707 ) converts the rotation of the leading screw (703...

Embodiment 2

[0030] The main structure of this embodiment is the same as that of Embodiment 1. Furthermore, in addition to bearing the weight of each component, the semi-flexible throat block of the nozzle section of the large-scale continuous transonic wind tunnel also needs to consider the complex and variable aerodynamic load. It is necessary to judge the layout of the guide rail slider according to the force of the specific mechanism. It is a double guide rail double slider arrangement or a multi guide rail multi slider arrangement, so as to ensure that the force is within the bearing range of the guide rail slider and make the guide rail slider normal. operation, and to ensure that it has a certain service life.

Embodiment 3

[0032] The main structure of this embodiment is the same as that of Embodiment 1. Furthermore, since the semi-flexible guide rail horizontal throat block driving device of the continuous transonic wind tunnel nozzle section will be subjected to lateral force, the guide rail horizontal throat block driving device is designed as A six-degree-of-freedom mechanism is used to obtain the ability to actively resist lateral forces, so the rotating hinge can choose a spherical hinge. However, since the displacement of the throat block in the longitudinal direction is very small, the space pose of the throat block is less than 5° at the lateral inclination angle, and since the joint bearing can rotate in three directions at a small angle, the joint bearing can also be used for the rotary hinge.

technical field

[0001] The invention relates to a continuous transonic wind tunnel nozzle section semi-flexible wall guide rail horizontal throat block drive device, which belongs to the field of special equipment for wind tunnel testing, and is a semi-flexible device for precise adjustment of different Mach numbers of the nozzle section in the wind tunnel. Horizontal throat block drive for wall nozzle guides. Background technique

[0002] The wind tunnel is an important test device used to verify whether the aerodynamic shape of various types of aerospace vehicles and high-speed EMUs is reasonable. Its main principle is to simulate the external gas flow field characteristics (Mach number, Reynolds number, etc.) number, Prandtl number, etc.), and make a series of evaluations on the measured parameters of the tested object in the simulated flow field, so as to realize the prediction of its characteristics under real working conditions. Wind tunnels can be divided into subson...

Examples

Embodiment 1

[0028]The support platform (5) is a flat plate with slots placed horizontally, used for installing and precisely positioning the guide rail (702), and can fully bear the force of the guide rail (702) on it during work. Good rigidity is ensured by designing its structure, which will ensure the pose forming accuracy of the final throat block (1). Several drive units (7) are housed on the support platform (5), and each drive unit (7) includes: a servo motor (705) is connected with a right-angle reducer (706) to reduce the output speed of the motor, and the servo motor (705 ) and the reducer (706) are horizontally installed on the support platform (5) through the reducer support (709); The leading screw (703) is installed on the top of the support platform (5) by the leading screw support (701), the output of the reducer (706) drives the leading screw (703) to rotate through the shaft coupling (704), and the leading screw nut (707 ) converts the rotation of the leading screw (703...

Embodiment 2

[0030] The main structure of this embodiment is the same as that of Embodiment 1. Furthermore, in addition to bearing the weight of each component, the semi-flexible throat block of the nozzle section of the large-scale continuous transonic wind tunnel also needs to consider the complex and variable aerodynamic load. It is necessary to judge the layout of the guide rail slider according to the force of the specific mechanism. It is a double guide rail double slider arrangement or a multi guide rail multi slider arrangement, so as to ensure that the force is within the bearing range of the guide rail slider and make the guide rail slider normal. operation, and to ensure that it has a certain service life.

Embodiment 3

[0032] The main structure of this embodiment is the same as that of Embodiment 1. Furthermore, since the semi-flexible guide rail horizontal throat block driving device of the continuous transonic wind tunnel nozzle section will be subjected to lateral force, the guide rail horizontal throat block driving device is designed as A six-degree-of-freedom mechanism is used to obtain the ability to actively resist lateral forces, so the rotating hinge can choose a spherical hinge. However, since the displacement of the throat block in the longitudinal direction is very small, the space pose of the throat block is less than 5° at the lateral inclination angle, and since the joint bearing can rotate in three directions at a small angle, the joint bearing can also be used for the rotary hinge.

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