A synchronous drive device applied to a reverse thrust test bench

Abstract

The present invention relates to a synchronous drive device applied to a thrust reverser test bench, which comprises a fixed frame, guide rails, a rigid moving frame, a driving electric cylinder, a driving rod assembly and a first bearing support; the fixed frame is arranged on the bottom plate of the thrust reverser test bench; the rigid moving frame spans above the fixed frame; the guide rails are symmetrically arranged in the middle and rear regions on the left and right sides of the fixed frame and are parallel to the movement direction of the moving outer cover of the test bench; the middle part of the rigid moving frame is correspondingly slidably connected to the guide rails on both sides; the driving electric cylinder is arranged on the front side of the fixed frame; the output end of the driving electric cylinder is connected to the middle part of the rigid moving frame through a hinge support; the driving rod assembly is circumferentially connected between the rigid moving frame and the moving outer cover of the test bench. The present invention has the advantages of strong practicability, simple structure, convenient installation, etc., can effectively solve the problem of uneven force on the left and right moving outer covers, and meet the synchronous drive requirements of the thrust reverser test bench.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine test equipment, and in particular to a synchronous drive device applied to a reverse thrust test bench. Background Art

[0002] The existing reverse thrust device is mainly driven by a synchronous reverse thrust actuator. The reverse thrust actuator synchronously drives the deployment of the moving outer cover of the reverse thrust device to ensure the synchronous movement of the left and right moving outer covers. Currently, the synchronous movement of the reverse thrust actuator is mainly realized by a hydraulic control device. The working principle of the synchronous reverse thrust actuator is as follows: Each reverse thrust actuator mainly consists of a cylinder body, a piston, a lead screw, a worm gear and a worm. The lead screw adopts a trapezoidal lead screw. Two or three hydraulic actuators of each moving outer cover are arranged circumferentially along the engine. In order to ensure the synchronous movement of each actuator, a synchronous flexible shaft is connected between each hydraulic actuator. The synchronous flexible shaft is connected to the worm, and the worm is connected to the lead screw through the worm gear. The nut cooperating with the lead screw is fixed on the piston. During the deployment or retraction of the reverse thrust system, when there is a displacement difference between two adjacent hydraulic actuators due to inconsistent pneumatic loads, a torsional angle will be formed on the synchronous flexible shaft, thereby generating a synchronous torque on the synchronous flexible shaft. At this time, for the actuator with a faster movement, the synchronous torque becomes a load force; while for the actuator with a slower movement, the synchronous torque becomes a driving force. Finally, under the action of the synchronous mechanism composed of the lead screw, the nut, the worm gear, the worm and the synchronous flexible shaft, the synchronous movement of the reverse thrust actuator is realized. For the synchronous drive device of the reverse thrust device test bench, if a hydraulic synchronous reverse thrust actuator system is adopted, multiple reverse thrust actuators need to be arranged circumferentially and connected by flexible shafts, and synchronous control is realized by using hydraulic pipelines. The overall structure is relatively complex and the installation requirements are high.

[0003] Chinese Patent CN 201820956863.X discloses a synchronous drive device, which is mainly used for a workpiece conveying device to ensure the synchronous movement of both ends of the same workpiece through two lifting plates. This synchronous drive device is applied to a conveying mechanism and mainly ensures the synchronous movement of both ends of the workpiece through two lifting plates. This device is not suitable for the synchronous drive of multiple independent components, and the horizontal moving plate in the mechanism is guided to move through a lifting curve guide groove, and a jamming force is likely to be generated in the direction of the vertical guide groove. In addition, since the cylinder providing the power mechanism is installed on one side of the moving plate, it will cause uneven forces at both ends of the horizontal plate, and when a large driving force is provided, the overall mechanism is likely to be deformed.

[0004] Chinese Patent CN 201620812254.8 discloses a driven mechanical synchronization device, which includes two sets of driving devices, and controls the synchronous driving of the motors in the two sets of driving devices through a synchronous gear transmission mechanism. This device is mainly applied to the dual-motor driving device of a mechanical parking equipment. The mechanical synchronization device uses a synchronous gear mechanism to connect two motors to ensure the synchronous driving of the two motors. This device mainly ensures the synchronization of the two motors through a mechanical structure. When the connection distance is large, the transmission errors of gears and sprockets will become larger. Moreover, the said dual-motor driving device is generally applicable to lifting motors and not applicable to the synchronous driving of horizontal devices, making it difficult to meet the driving requirements for the unfolding movement of a planar mechanism. Summary of the Invention

[0005] In view of the above problems, the purpose of the present invention is to provide a synchronous driving device applied to a reverse thrust test bench. Aiming at the driving requirements of the reverse thrust device experiment, it changes the existing complex hydraulic synchronous reverse thrust actuator system, and provides a simplified synchronous driving device for the reverse thrust test bench to meet the synchronous movement requirements of the moving cover of the test bench.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A synchronous driving device applied to a reverse thrust test bench proposed by the present invention includes a fixed frame, guide rails, a rigid moving frame, driving electric cylinders, driving rod assemblies, and first bearing supports; the fixed frame is arranged on the bottom plate of the reverse thrust test bench and corresponds to the movement direction of the moving outer cover of the test bench; the rigid moving frame spans above the fixed frame; the guide rails are symmetrically arranged in the middle and rear regions on the left and right sides of the fixed frame and are parallel to the movement direction of the moving outer cover of the test bench; the front and rear ends of the guide rails are respectively connected to the fixed frame through the first bearing supports; the left and right sides in the middle of the rigid moving frame are respectively slidably connected to the corresponding guide rails; the driving electric cylinders are arranged on the front side of the fixed frame and on the central axis between the two guide rails; the output end of the driving electric cylinder is connected to the middle of the rigid moving frame through a hinge support; the driving rod assemblies are respectively circumferentially connected between the rigid moving frame and the moving outer cover of the test bench.

[0008] Further, the driving electric cylinder includes an electric cylinder base, a trunnion-type electric cylinder, and a second bearing support; the electric cylinder base is arranged on the front side of the fixed frame and on the extension line of the central axis between the two guide rails; the trunnion-type electric cylinder is arranged in the middle of the electric cylinder base; the output end of the trunnion-type electric cylinder is connected to the middle of the rigid moving frame through a hinge support; the trunnions of the trunnion-type electric cylinder are arranged inside the output end of the electric cylinder, and the two ends of the trunnions are respectively connected to the electric cylinder base through the second bearing supports, enabling the trunnion-type electric cylinder to swing up and down around its trunnions.

[0009] Further, the driving rod assembly includes a two-force rod and a ball pair; the ball pairs are respectively arranged at both ends of the two-force rod; both ends of the two-force rod are respectively connected to the moving outer cover of the test bench and the rigid moving frame through the ball pairs.

[0010] Further, the guide rail is a cylindrical guide rail.

[0011] Further, a linear bearing is arranged at the connection between the rigid moving frame and the guide rail.

[0012] Further, the rigid moving frame is welded by two steel plates spaced at a certain distance.

[0013] Further, the bottom end of the fixed machine frame is respectively fixedly connected to the bottom plate of the thrust reverser test bench through bolts.

[0014] The present invention has the following beneficial effects compared with the prior art:

[0015] The present invention simplifies the complex hydraulic synchronous actuation system in the original thrust reverser device. According to the driving requirements and installation requirements of the thrust reverser test bench, a synchronous driving device with a simple structure and strong applicability is provided. The synchronous driving device is provided with an independent fixed machine frame and is installed in the moving direction of the test bench. The overall synchronous driving device provides driving force through a single trunnion-type electric cylinder, and then evenly transmits the driving force to the left and right moving outer covers through the rigid moving frame on the cylindrical guide rail to achieve the synchronous driving of the thrust reverser test bench. Compared with the existing hydraulic synchronous actuation system, the present invention can simplify the synchronous connection mechanism between multiple actuators, reduce the installation complexity, and greatly save the manufacturing cost on the premise of meeting the synchronous driving requirements of the thrust reverser test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the use effect of a synchronous driving device applied to a thrust reverser test bench proposed by the present invention;

[0017] Figure 2 is a top view structural schematic diagram of the present invention;

[0018] Figure 3 is Figure 2 a partial enlarged structural schematic diagram in

[0019] Among them, reference numerals: 1-bottom plate; 2-fixed machine frame; 21-first bearing support; 3-electric cylinder base; 4-trunnion-type electric cylinder; 41-trunnion; 5-second bearing support; 6-guide rail; 7-rigid moving frame; 71-linear bearing; 72-second hinge support; 73-first hinge support; 8-two-force rod; 81-ball pair; 9-moving outer cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating that the device or component must have a specific orientation, be constructed and operated in a specific orientation.

[0022] See the attached Figures 1 to 3 , which shows the specific structure of an embodiment of a synchronous drive device applied to a reverse thrust test bench proposed by the present invention. The device includes a fixed frame 2, a guide rail 6, a rigid moving frame 7, a driving electric cylinder, a driving rod assembly, and a first bearing support 21; the bottom end of the fixed frame 2 is fixed to the bottom plate 1 of the existing reverse thrust test bench by bolts and corresponds to the movement direction of the moving outer cover 9 on the test bench; the rigid moving frame 7 spans above the fixed frame 2; in this embodiment, the rigid moving frame 7 is welded by two steel plates spaced a certain distance to ensure the overall stiffness of the moving frame; the guide rail 6 adopts a cylindrical structure; the guide rail 6 is symmetrically arranged between the middle and rear regions on the left and right sides of the upper surface of the fixed frame 2 and is parallel to the movement direction of the moving outer cover 9 of the test bench; the front and rear ends of the guide rail 6 are respectively connected to the upper surface of the fixed frame 2 through the first bearing support 21; the left and right sides of the middle part of the rigid moving frame 7 are respectively slidably connected to the corresponding guide rails 6 on both sides, and the rigid moving frame 7 is slidably connected to the guide rail 6 through a linear bearing 71, converting sliding friction into rolling friction and greatly reducing the friction between the rigid moving frame 7 and the guide rail 6; the driving electric cylinder is arranged on the front side of the upper surface of the fixed frame 2 and on the extension line of the central axis in the middle of the two guide rails 6; the output end of the driving electric cylinder is vertically fixedly connected to the axisymmetric center position of the rigid moving frame 7 through a first hinge support 73; the driving rod assembly is circumferentially connected between the left end face of the rigid moving frame 7 and the right end faces of the moving outer covers 9 on the left and right sides of the test bench.

[0023] Among them, the driving rod assembly includes a two-force rod 8 and a ball pair 81; the ball pairs 81 are respectively arranged at both ends of the two-force rod 8; both ends of the two-force rod 8 are respectively connected to the moving outer cover 9 of the test bench and the rigid moving frame 7 through the ball pairs 81; in this embodiment, four groups of driving rod assemblies are provided. At the upper and lower 45-degree angle positions on the right end faces of the moving outer covers 9 on the left and right sides of the thrust reverser test bench, second hinge supports 72 are respectively fixedly installed. The four second hinge supports 72 are circumferentially evenly distributed. Correspondingly, four second hinge supports 72 are also circumferentially arranged at the corresponding positions on the left end face of the rigid moving frame 7. The four second hinge supports 72 on the left end face of the rigid moving frame 7 respectively correspond to the second hinge supports 72 on the moving outer covers 9 on the left and right sides of the test bench one by one; both ends of the two-force rod 8 are ball-joint connected to the corresponding second hinge supports 72 on the rigid moving frame 7 and the moving outer cover 9; through the four circumferentially connected two-force rods 8, the force received during the movement of the moving outer cover 9 is ensured to be uniform.

[0024] The driving electric cylinder includes an electric cylinder base 3, an ear-shaft type electric cylinder 4 and a second bearing support 5; the electric cylinder base 3 is installed on the front side of the fixed frame 2 through bolt connection and is located on the extension line of the central axis between the two side guide rails 6; the ear-shaft type electric cylinder 4 is arranged in the middle of the electric cylinder base 3; the output end of the ear-shaft type electric cylinder 4 is connected to the first hinge support 73 through a spherical bearing, and the first hinge support 73 is vertically fixed in the middle of the rigid moving frame 7; the ear shaft 41 of the ear-shaft type electric cylinder 4 is arranged inside the output end of the electric cylinder, and both ends of the ear shaft 41 are respectively rotatably connected to the second bearing support 5. The bottom of the second bearing support 5 is fixedly connected to the electric cylinder base 3, so that the front side of the ear-shaft type electric cylinder 4 can swing up and down around its ear shaft 41; this design is mainly to eliminate the assembly error, ensure that the driving force direction of the electric cylinder is always consistent with the movement direction of the rigid moving frame 7, and prevent driving jamming.

[0025] The driving force is provided by the ear-shaft type electric cylinder 4 to push the rigid moving frame 7 to move horizontally along the circular guide rail 6. Then, the rigid moving frame 7 drives the four two-force rods 8 to move simultaneously. The driving force is transmitted to the moving outer covers 9 on the left and right sides of the thrust reverser test bench through the two-force rods 8, realizing the synchronous drive of the moving outer covers 9 on the left and right sides.

[0026] The above-described embodiments are only used to describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A synchronous drive device applied to a reverse thrust test bench, characterized in that: The device includes a fixed frame, guide rails, a rigid moving frame, a driving electric cylinder, a driving rod assembly, and a first bearing support; the fixed frame is arranged on the bottom plate of the thrust reverser test bench and corresponds to the movement direction of the moving outer cover of the test bench; the rigid moving frame spans above the fixed frame; the guide rails are symmetrically arranged in the middle and rear regions on the left and right sides of the fixed frame and are parallel to the movement direction of the moving outer cover of the test bench; the front and rear ends of the guide rails are respectively connected to the fixed frame through the first bearing supports; the left and right sides in the middle of the rigid moving frame are respectively connected to the corresponding guide rails in a sliding manner; the driving electric cylinder is arranged on the front side of the fixed frame and on the central axis between the two guide rails; the output end of the driving electric cylinder is connected to the middle of the rigid moving frame through a hinge support; the driving rod assembly is circumferentially connected between the rigid moving frame and the moving outer cover of the test bench. The driving electric cylinder includes an electric cylinder base, a trunnion type electric cylinder, and a second bearing support; the electric cylinder base is arranged on the front side of the fixed frame and on the extension line of the central axis between the two guide rails; the trunnion type electric cylinder is arranged in the middle of the electric cylinder base; the output end of the trunnion type electric cylinder is connected to the middle of the rigid moving frame through a hinge support; the trunnions of the trunnion type electric cylinder are arranged inside the output end of the electric cylinder, and the two ends of the trunnions are respectively connected to the electric cylinder base through the second bearing supports, so that the trunnion type electric cylinder can swing up and down around its trunnions.

2. The synchronous drive device applied to the reverse thrust test bench according to claim 1, wherein: The driving rod assembly includes a two-force rod and spherical pairs; the spherical pairs are respectively arranged at both ends of the two-force rod; both ends of the two-force rod are respectively connected to the moving outer cover of the test bench and the rigid moving frame through the spherical pairs.

3. The synchronous drive device applied to the reverse thrust test bench according to claim 1, wherein: The guide rails are cylindrical guide rails.

4. The synchronous drive device applied to the reverse thrust test bench according to claim 1, characterized in that: Linear bearings are arranged at the connection between the rigid moving frame and the guide rails.

5. The synchronous drive device applied to a reverse thrust test bench according to claim 1, characterized in that: The rigid moving frame is welded by two steel plates spaced at a certain distance.

6. The synchronous drive device applied to the reverse thrust test bench according to claim 1, wherein: The bottom end of the fixed frame is respectively fixedly connected to the bottom plate of the thrust reverser test bench through bolts.

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