Flexible connection load applying device under high-speed movement

Abstract

The invention belongs to the technical field of airplane structure strength tests, and relates to a flexible connection load applying device under high-speed movement. The device comprises a position control actuating cylinder (1), two anti-rotation lugs (2) and a multi-stage lever (8), wherein the position control actuating cylinder (1) is configured to synchronously move along with a pulley in the horizontal direction; the anti-rotation double-lug (2) is fixed on an output shaft of the position control actuator cylinder (1) and is provided with a double-lug piece (21) and channel steel (22); each last-stage structure of the multi-stage lever (8) is connected with a pulley through an adhesive tape (7), a first-stage connector structure is connected with a steel wire rope (4), the steel wire rope (4) is steered through the pulley (3) of the anti-rotation double-lug (2), then vertically extends downwards along a guide groove of the channel steel (22) and is connected with a weight balance weight piece (6), and a specified flexible connection load is applied to the sliding rail through the weight balance weight piece (6). The parallelism of the axis of the pulley and the ground during movement is guaranteed, and the risk that the steel wire rope is separated from the pulley is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft structure strength testing, and in particular relates to a flexible connection load applying device under high-speed motion. Background Art

[0002] Wear failure is a common failure mode of aircraft slide rail mechanism components. Motion wear test is a necessary condition to ensure the engineering design and verification of such mechanisms. In the reciprocating motion test of the slide rail, in addition to the reciprocating motion load applied to it by the driving mechanism, it is usually necessary to apply a fixed load on its surface. For example, after the first actuator is connected to the left side of the slide rail, the second actuator is also connected to the right side. The first actuator drives the slide rail to reciprocate, and the second actuator continuously applies a constant tensile load to the slide rail. This constant tensile load is achieved by the follow-up motion of the second actuator. The second actuator is a conventional hydraulic pressure-controlled actuator. Obviously, it is difficult to apply a constant tensile load to a moving part such as a slide rail through a hydraulic pressure-controlled actuator, especially when the slide rail moves from static to start moving. Its movement speed is too fast. The hydraulic valve must ensure that the force loading value is accurate, and the piston rod movement speed must be consistent with the movement speed of the slide. In fact, it is difficult to achieve consistency between the two. Therefore, this test is prone to problems such as difficulty in test control and excessive load tolerance, which makes the slide rail surface at risk of damage. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present application provides a flexible connection load applying device under high-speed motion, which is used to apply a flexible connection load to a pulley under a wear failure test, and the flexible connection load applying device includes:

[0004] A position control actuator is fixed on the column, and the position control actuator is configured so that its output shaft performs synchronous telescopic movement in the horizontal direction with the pulley;

[0005] The anti-rotation double ears are fixed on the output shaft of the position control actuator. The anti-rotation double ears have double ear plates and channel steel fixed between the double ear plates. A pulley is connected between the double ear plates, and the channel steel has a vertical downward guide groove;

[0006] A multi-stage lever, each of the final-stage structures of the multi-stage lever is connected to the pulley through a tape, and the first-stage joint structure of the multi-stage lever is connected to the wire rope. After the wire rope is turned by the pulley, it extends vertically downward along the guide groove of the channel steel and is connected to the suspended weight counterweight. The specified soft connection load is applied to the slide rail through the weight counterweight.

[0007] Preferably, the columns are fixed on a load-bearing floor.

[0008] Preferably, the column has a vertical track rail, a mounting joint is slidably connected in the vertical track groove, the mounting joint is fixed at a specified height of the vertical track rail of the column by a tightening bolt, and the position control actuator is fixedly connected to the mounting joint.

[0009] Preferably, the double-ear piece is connected to the channel steel by bolts.

[0010] Preferably, the pulley is connected to the double-ear piece via a pin.

[0011] Preferably, a force sensor is provided between the first-stage joint structure of the multi-stage lever and the steel wire rope.

[0012] The present application can meet the demand for precise application of soft-connection load on the surface of the lower rail mechanism during high-speed movement, ensure the parallelism of the pulley axis with the ground during movement, and avoid the risk of the wire rope detaching from the pulley. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the soft connection load applying device under high-speed movement of the present application.

[0014] Figure 2 For this application Figure 1 Schematic diagram of the cooperation between the anti-rotation ears and the steel wire rope in the illustrated embodiment.

[0015] Among them, 1-position-controlled actuator, 2-anti-rotation double ears, 21-double ear plates, 22-channel steel, 3-pulley, 4-wire rope, 5-force sensor, 6-weight counterweight, 7-tape, 8-lever main joint, 9-column, 10-load-bearing floor. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0017] The present application provides a flexible connection load application device under high-speed motion, which is used to apply a flexible connection load to a pulley under a wear failure test, such as Figure 1 and Figure 2As shown, the flexible connection load applying device mainly includes:

[0018] The position control actuator 1 is fixed on the column 9, and the position control actuator 1 is configured so that its output shaft performs synchronous telescopic movement in the horizontal direction with the pulley;

[0019] The anti-rotation double ears 2 are fixed on the output shaft of the position control actuator 1. The anti-rotation double ears 2 have double ear pieces 21 and a channel steel 22 fixed between the double ear pieces. A pulley 3 is connected between the double ear pieces 21. The channel steel 22 has a vertical downward guide groove.

[0020] A multi-stage lever 8, each final-stage structure of the multi-stage lever 8 is connected to the pulley through a tape 7, and the first-stage joint structure of the multi-stage lever 8 is connected to the wire rope 4. After the wire rope 4 is turned by the pulley 3, it extends vertically downward along the guide groove of the channel steel 22 and is connected to the suspended weight counterweight 6, and a specified soft connection load is applied to the slide rail through the weight counterweight 6.

[0021] The present application adopts the combined movement mode of "position-controlled actuator 1 + pulley 3 + weight counterweight 6" to provide a real-time and accurate method for applying soft-connection load on the surface of the slide rail, avoiding the risk of damaging the test piece due to excessive overshoot of load when the test piece moves from static to moving. That is, during the movement of the position-controlled actuator 1 with the slide rail, the slide rail is continuously subjected to a fixed-size tensile load applied by the weight counterweight 6, and collision damage to the surface of the slide rail will not occur due to the inconsistent movement speed of the position-controlled actuator 1 and the slide rail. At the same time, when the slide rail moves at high speed, the displacement signal of the slide rail movement is fed back to the position-controlled actuator 1, thereby driving the weight counterweight 6 to run at the same speed, realizing the follow-up property of the load. At this time, the wire rope 4 will not slide up and down with the movement of the test piece, avoiding the variable load generated by the deadweight and displacement of the weight when it moves up and down from being applied to the slide rail test piece, reducing the overshoot effect caused by the untimely response of the controller, and improving the accuracy of load application.

[0022] The weight counterweight 6 of the present application is a structural member used to apply load to the surface of the slide rail, connected to a multi-stage lever 8 through a steel wire rope, and the multi-stage lever 8 is softly connected to the surface of the slide rail through a plurality of adhesive tapes 7, and the direction of the steel wire rope is along the force direction of the slide rail surface. The staff manually adds weights before starting the test, and when the load value reaches the task requirement, the weight counterweight is configured.

[0023] On the other hand, the present application ensures that the axis of the pulley 3 is parallel to the ground during movement by jointly designing the anti-rotation ears 2 and the weight counterweight 6. Specifically, the self-rotation of the actuator piston rod is prevented by the combined action of the channel steel 22 and the weight counterweight 6. That is, when the actuator piston rod rotates, the deadweight of the weight and the channel steel can prevent its rotation or twist it to its initial state, thereby avoiding the risk of the wire rope escaping from the pulley groove.

[0024] The present application can be applied to the design of high-speed motion fatigue tests of slide rail mechanisms, effectively reducing the risk of test operation and improving the test loading and control accuracy.

[0025] In some optional embodiments, the column 9 is fixed on the load-bearing floor 10. The column 9 can be fixed on the load-bearing floor 10 by means of a mounting track on the load-bearing floor 10 and bolts.

[0026] In some optional embodiments, the column 9 has a vertical track rail, and a mounting joint is slidably connected in the vertical track groove. The mounting joint is fixed at a specified height of the vertical track rail of the column 9 by a tightening bolt, and the position control actuator 1 is fixedly connected to the mounting joint.

[0027] This embodiment can adjust the installation height of the position control actuator 1 so that the output shaft axis of the position control actuator 1 coincides with the load center line of the slide rail test piece. In addition to being used to fix the position control actuator 1, the column 9 is also used to fix the slideway. The slideway here refers to a structural part that cooperates with the slide rail test piece to complete the wear fault test. During the test, the slideway is fixed differently, and the slide rail reciprocates on the slideway under multiple forces.

[0028] In some optional embodiments, the double-ear piece 21 is connected to the channel steel 22 by bolts. In this embodiment, the channel steel 22 is installed on the conventional double-ear piece 21 by bolts, and its installation position is determined by the position of the wire rope after the turn, ensuring that the wire rope is in the guide groove of the channel steel.

[0029] In some optional embodiments, the pulley 3 is connected to the double-ear piece 21 via a pin.

[0030] In some optional embodiments, a force sensor 5 is provided between the first-stage joint structure of the multi-stage lever 8 and the steel wire rope 4 .

[0031] The force sensor 5 of this embodiment is used during the initial weighting of the weight counterweight 6. When the staff performs the initial weighting on the weight counterweight 6, they can monitor the weight of the weight. After removing the friction of the wire rope turning through the pulley, it can ensure consistency with the soft connection load, thereby achieving precise application of the soft connection load.

[0032] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A flexible connection load applying device under high-speed motion, used to apply a flexible connection load to a pulley under a wear failure test, characterized in that: The device includes: A position control actuator (1) is fixed on the column (9), and the position control actuator (1) is configured so that its output shaft performs synchronous telescopic movement in the horizontal direction along with the pulley; The anti-rotation double ears (2) are fixed on the output shaft of the position control actuator (1), the anti-rotation double ears (2) have double ear plates (21) and channel steel (22) fixed between the double ear plates, a pulley (3) is connected between the double ear plates (21), and the channel steel (22) has a vertical downward guide groove; A multi-stage lever (8), each end-stage structure of the multi-stage lever (8) is connected to a pulley via a tape (7), the first-stage joint structure of the multi-stage lever (8) is connected to a steel wire rope (4), the steel wire rope (4) is turned by the pulley (3), extends vertically downward along the guide groove of the channel steel (22), and is connected to a suspended weight counterweight (6), and a specified soft connection load is applied to the slide rail via the weight counterweight (6).

2. The flexible connection load applying device under high-speed motion according to claim 1, characterized in that: The upright column (9) is fixed on the load-bearing floor (10).

3. The flexible connection load applying device under high-speed motion according to claim 1, characterized in that: The column (9) has a vertical track rail, and a mounting joint is slidably connected in the vertical track groove. The mounting joint is fixed at a specified height of the vertical track rail of the column (9) by a clamping bolt, and the position control actuator (1) is fixedly connected to the mounting joint.

4. The flexible connection load applying device under high-speed motion according to claim 1, characterized in that: The double ear piece (21) is connected to the channel steel (22) by bolts.

5. The flexible connection load applying device under high-speed motion according to claim 1, characterized in that: The pulley (3) is connected to the double-ear piece (21) via a pin.

6. The flexible connection load applying device under high-speed motion according to claim 1, characterized in that: A force sensor (5) is arranged between the first-stage joint structure of the multi-stage lever (8) and the steel wire rope (4).

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