A composite load simulation system for an actuator

Abstract

The application provides a composite load simulation system of an actuator, and relates to the technical field of aircraft part testing equipment, which comprises a rack, a radial loading unit and an axial loading unit; the rack is provided with an actuator fixing part and a sliding seat; the radial loading unit is used for applying a radial loading force to an output shaft; the axial loading unit comprises a second linear power output unit and a force transmission unit; the telescopic end of the second linear power output unit is connected with the sliding seat so as to be capable of pushing the sliding seat to slide; the force transmission unit comprises a force sensor arranged on the sliding seat, a first support or a first rolling part connected with the force sensor, and a corresponding first rolling part or first support arranged on the output shaft of the linear actuator; the first rolling part abuts against the first support and is capable of rolling along the radial direction of the output shaft relative to the first support. The composite load simulation system of the actuator can avoid the coupling of the radial loading force and the axial loading force to affect the testing precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aircraft part testing equipment, and particularly relates to a composite load simulation system of an actuator. BACKGROUND

[0002] An actuator is an execution mechanism for an aircraft, and can be divided into a linear actuator and a rotary actuator according to a motion form. The composite load simulation system of the linear actuator is mainly used for functional testing of the linear actuator, and can simulate various forces and torques that the linear actuator receives in an actual working process, so as to verify the structural strength, control system performance and reliability of the linear actuator.

[0003] The existing load simulation system mainly applies loading forces in the axial and radial directions of the linear actuator to simulate the actual working conditions of the linear actuator. However, when the radial loading is applied to the linear actuator, the axial loading and the radial loading are coupled. Specifically, when the output shaft of the linear actuator is subjected to the radial loading, the output shaft will have a certain radial deformation, and the deformation will affect the force sensor for measuring the axial loading force, thereby reducing the loading accuracy of the axial loading and reducing the restoration degree of the simulated load. SUMMARY

[0004] Therefore, the present application provides a composite load simulation system of an actuator to at least partially avoid the coupling between the radial loading and the axial loading and affect the simulation accuracy.

[0005] The technical scheme of the present application is as follows:

[0006] A composite load simulation system of an actuator comprises:

[0007] A rack is provided with an actuator fixing portion and a sliding seat. The actuator fixing portion is used for fixing a linear actuator to be tested. The sliding seat can slide on the rack along the axial direction of the output shaft of the linear actuator.

[0008] A radial loading unit comprises a first linear power output unit arranged on the sliding seat. The output rod of the first linear power output unit is perpendicular to the output shaft, and is used for applying a radial force to the output shaft.

[0009] The axial loading unit comprises a fixed seat, a second linear power output unit and a force transmission unit; the fixed seat is arranged on the rack, the second linear power output unit is arranged between the fixed seat and the sliding seat and can push the sliding seat to slide; the force transmission unit comprises a force sensor fixedly arranged on the sliding seat, a first support or a first rolling element connected with a pressure bearing part of the force sensor, and a corresponding first rolling element or first support arranged on the output shaft, the first rolling element abuts against the first support and can roll along the radial direction of the output shaft relative to the first support.

[0010] Further, the end of the output rod is provided with a second support or a second rolling element, and the output shaft is correspondingly provided with a second rolling element or a second support; the second rolling element abuts against the second support and can roll along the axial direction of the output shaft relative to the second support.

[0011] Further, the end of the output shaft is fixedly provided with a connecting body, and the connecting body is rotatably provided with a rotating ring; the first rolling element is fixedly arranged on the connecting body, and the second support is fixedly arranged on the rotating ring; the sliding seat is provided with a bracket, the first linear power output unit is mounted on the bracket, and the fixed position of the bracket on the sliding seat can rotate around the axis of the output shaft.

[0012] Further, the connecting body comprises a base, a connecting part and an elastic element; the base is fixedly arranged on the output shaft, the connecting part can slide along the axial direction of the output shaft on the base, the elastic element abuts between the base and the connecting part and applies a pushing force to the connecting part to make the connecting part away from the base; the rotating ring is arranged on the base, and the first rolling element is fixedly arranged on the connecting part; when the axial loading unit applies an axial loading force to the output shaft, the connecting part can slide close to the base to clamp the rotating ring with the base.

[0013] Further, the base is provided with a plurality of insertion holes, the connecting part is fixedly provided with a plurality of insertion rods, the insertion rods are slidably inserted into the insertion holes, and the elastic element is a spring arranged in the insertion hole, the spring abuts between the bottom surface of the insertion hole and the insertion rod.

[0014] Further, two long holes are formed in the sliding seat, the center lines of the two long holes are circular arcs, and the centers of the center lines are located on the axis of the output shaft; at least one screw rod is fixedly arranged on the bracket corresponding to each long hole, the screw rod can pass through the corresponding long hole and be screwed with a nut to form the fixation of the bracket on the sliding seat.

[0015] Further, the first support is connected with the input end of the force sensor, and a through hole is arranged on the first support in a length direction perpendicular to the axial direction of the output shaft, and a through hole is arranged on the side wall of the linear actuator close to the through hole; a connecting rod is arranged on the output shaft and can be inserted into the through hole through the through hole, and the first rolling element is rotatably arranged on the end of the connecting rod.

[0016] Further, two parallel and spaced guide rails are arranged on the rack, and a sliding block capable of sliding on the two guide rails is arranged on the sliding seat.

[0017] Further, a displacement sensor is arranged on the rack and located on one side of the sliding seat, and the sliding seat is connected with the signal input end of the displacement sensor.

[0018] The working principle and beneficial effects of the present application are as follows:

[0019] The actuator composite load simulation system provided by the present application sets a first support or a first rolling element on the input end of the force sensor, and correspondingly sets a first rolling element or a first support on the output shaft, wherein the first rolling element abuts against the first support and can roll along the radial direction of the output shaft relative to the first support; when the radial load is applied to the output shaft, the first rolling element can slide relative to the first support, thereby avoiding the influence of the deformation of the output shaft along its radial direction on the accuracy of the axial load. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0021] Figure 1 The perspective view of the actuator composite load simulation system provided by the embodiment of the present application;

[0022] Figure 2 The perspective view of the actuator composite load simulation system provided by the embodiment of the present application from another angle;

[0023] Figure 3 The partial enlarged view of A in the middle; Figure 1

[0024] Figure 4 The exploded view of the connecting body provided by the embodiment of the present application;

[0025] Figure 5 The exploded view of the connecting body provided by the embodiment of the present application from another angle;

[0026] Figure 6 The exploded view of the bracket and the sliding seat provided by the embodiment of the present application;​

[0027] In the diagram: 100, stand; 110, actuator fixing part; 120, sliding seat; 121, bracket; 122, screw; 130, guide rail; 200, radial loading unit; 210, first linear power output unit; 211, tension / compression sensor; 212, output rod; 213, second rolling element; 214, second support element; 201, elongated hole; 300, axial loading unit; 310, fixing seat; 320, second linear power output unit; 330, force transmission unit; 331, force sensor; 332, first support element; 333, first rolling element; 400, linear actuator; 401, insertion hole; 410, output shaft; 420, connecting body; 421, base; 422, connecting part; 423, insertion rod; 424, elastic element; 430, rotating ring; 500, displacement sensor. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] This embodiment provides a composite load simulation system for an actuator, which will be referred to as a load simulation system below. Reference Figure 1 and Figure 2 As shown, the load simulation system includes a test bench 100, a radial loading unit 200, and an axial loading unit 300. An actuator fixing part 110 and a sliding seat 120 are provided on the test bench 100. The actuator fixing part 110 is used to fix the linear actuator 400 to be tested; the sliding seat 120 is slidably mounted on the test bench 100, and the sliding direction of the sliding seat 120 is parallel to the axial direction of the output shaft 410 of the linear actuator 400.

[0030] refer to Figure 1 As shown, the radial loading unit 200 includes a first linear power output unit 210 disposed on the sliding seat 120. The output rod 212 of the first linear power output unit 210 is perpendicular to the output shaft 410 of the linear actuator 400. The first linear power output unit 210 is used to apply a loading force along the radial direction of the output shaft 410 to the output shaft 410.

[0031] refer to Figures 1 to 3As shown, the axial loading unit 300 comprises a fixed seat 310, a second linear power output unit 320 and a force transmission unit 330; the fixed seat 310 is fixedly arranged on the rack 100, the telescopic end of the second linear power output unit 320 is connected with the sliding seat 120, the other end is connected with the fixed seat 310, and the sliding seat 120 can be pushed to slide.

[0032] The force transmission unit 330 comprises a force sensor 331 fixedly arranged on the sliding seat 120, a first support 332 or a first rolling member 333 connected with the pressure bearing part of the force sensor 331, and a corresponding first rolling member 333 or first support 332 arranged on the output shaft 410, the first rolling member 333 abuts against the first support 332 and can roll along the radial direction of the output shaft 410 relative to the first support 332.

[0033] Based on the above structure, in use, the load simulation system of the embodiment can push the sliding seat 120 by the second linear power output unit 320 to apply an axial loading force to the output shaft 410. And the output shaft 410 can be pushed along the radial direction of the output shaft 410 by the first linear power output unit 210 to apply a radial loading force to the output shaft 410, so as to complete the load simulation of the linear actuator 400. In the load simulation system of the embodiment, when the radial loading force is applied to the output shaft 410, the deformation of the output shaft 410 caused by the radial loading force will drive the first rolling member 333 to slide along the radial direction of the output shaft 410 relative to the first support 332, avoiding affecting the measurement result of the force sensor 331 and avoiding affecting the test accuracy.

[0034] Specifically, referring to Figure 1 and Figure 2 As shown, the rack 100 of the embodiment is a base for mounting other components, which can be arranged as needed, and will not be described in detail here. The actuator fixing part 110 of the embodiment comprises a base fixedly arranged on the rack 100, and the linear actuator 400 to be tested is fixed on the base.

[0035] Referring to Figure 1 and Figure 2 As shown, in the embodiment, two parallel and spaced guide rails 130 are fixedly arranged on the rack 100, the two guide rails 130 are respectively located on the two sides of the base, and the length direction of the two guide rails 130 is parallel to the axial direction of the output shaft 410 of the linear actuator 400. The sliding seat 120 is fixedly arranged with sliding blocks which can respectively slide on the two guide rails 130. That is, in the embodiment, the sliding of the sliding seat 120 on the rack is guided by the cooperation of the guide rails 130 and the sliding blocks, so that the sliding seat 120 can slide on the rack 100 along the axial direction of the output shaft 410.

[0036] In some embodiments, two guide rods can also be fixedly arranged on the bench 100, and linear bearings respectively sleeved on the guide rods are fixedly arranged on the sliding seat 120 to guide the sliding of the sliding seat 120.

[0037] In the embodiment, the first linear power output unit 210 is a voice coil motor arranged on the sliding seat 120. The voice coil motor can adopt an existing product, and the structure and working principle thereof will not be described here. In some embodiments, the first linear power output unit 210 can also be a pneumatic cylinder, a hydraulic cylinder, or an electric telescopic cylinder.

[0038] Referring to FIGS. 1 and 2, Figure 1 and Figure 3 In the embodiment, a tension and pressure sensor 211 is arranged on the telescopic end of the voice coil motor, and the output rod 212 is connected to the pressure bearing part of the tension and pressure sensor 211. A second rolling part 213 is arranged on the end of the output rod 212, and a second support part 214 is fixedly arranged on the output shaft 410 of the linear actuator 400. The second rolling part 213 abuts against the second support part 214 and can roll along the axial direction of the output shaft 410 relative to the second support part 214.

[0039] A specific structure of the second support part 214 can be referred to FIG. 3. Figure 3 As shown in FIG. 3, the second support part 214 is in the shape of a cuboid, and a long strip-shaped through hole is formed on the second support part 214, and the length direction of the through hole is parallel to the axial direction of the output shaft 410. A through hole is formed on the side wall of the through hole away from the output shaft 410, and the end of the output rod 212 away from the tension and pressure sensor 211 is inserted into the through hole through the through hole. The second rolling part 213 is rotatably arranged on the end of the output rod 212 located in the through hole.

[0040] By arranging the second support part 214 and the second rolling part 213, the first linear power output unit 210 can only exert a radial loading force on the output shaft 410. Specifically, if the output rod 212 is fixedly connected or hinged to the output shaft 410, it is difficult to make the output rod 212 and the output shaft 410 perpendicular because the connecting point of the output rod 212 and the output shaft 410 is fixed. If the output rod 212 and the output shaft 410 are not perpendicular, the output rod 212 will exert an axial component force on the output shaft 410, affecting the test results. By arranging the second support part 214 and the second rolling part 213, it is easier to make the output rod 212 and the output shaft 410 perpendicular because the connecting point of the output rod 212 and the output shaft 410 is not fixed, so that the output rod 212 only exerts a radial loading force on the output shaft 410, avoiding affecting the test results.

[0041] In some embodiments, the second rolling member 213 can also be arranged on the output shaft 410, and the second support member 214 can be arranged on the output rod 212; they have the same principle, which will not be described in detail here.

[0042] Referring to Figure 1 and Figure 2 , the fixed seat 310 is located on the other side of the sliding seat 120 relative to the side provided with the base. The second linear power output unit 320 of the present embodiment is an electric telescopic cylinder, one end of which is hinged to the fixed seat 310, and the telescopic end is hinged to the sliding seat 120, so that the sliding seat 120 can be driven by the telescopic end of the electric telescopic cylinder to exert an axial loading force on the output shaft 410. In some embodiments, the second linear power output unit 320 can also be a gas cylinder or a hydraulic cylinder, etc.

[0043] Referring to Figure 1 and Figure 2 , the force sensor 331 is fixedly arranged on the sliding seat 120, and the first support member 332 is connected to the input end of the force sensor 331. The first rolling member 333 is fixedly arranged on the output shaft 410 of the linear actuator 400, the first rolling member 333 abuts against the first support member 332, and the first rolling member 333 can slide along the radial direction of the output shaft 410 relative to the first support member 332. It should be noted that the first rolling member 333 has the same structure as the second rolling member 213, and the first support member 332 and the second support member 214 have the same structure and working principle, only the installation direction is different, which will not be described here.

[0044] In the present embodiment, by arranging the first rolling member 333 and the first support member 332; when the first linear power unit exerts a radial loading force on the output shaft 410, the deformation of the output shaft 410 will drive the first rolling member 333 to slide relative to the first support member 332, so that the first support member 332 is still only subjected to an axial force along the output shaft 410, so that the measurement result of the force sensor 331 is more accurate. Compared with the scheme of the present embodiment, if the output shaft 410 is fixedly connected to the input end of the force sensor 331, the radial deformation of the output shaft 410 will also affect the detection result of the force sensor 331, so that the data measured by the force sensor 331 is distorted, affecting the test accuracy.

[0045] In some embodiments, the first rolling member 333 can also be connected to the input end of the force sensor 331, and the first support member 332 can be fixedly connected to the output shaft 410. They have the same working principle, which will not be described here.

[0046] In some embodiments, as Figure 4 , Figure 5 and Figure 6As shown in the figure, a connecting body 420 is fixed on the end of the output shaft 410, and a rotating ring 430 is rotatably arranged on the connecting body 420. The first rolling member 333 is fixed on the connecting body 420, and the second support member 214 is fixed on the rotating ring 430. A bracket 121 is arranged on the sliding seat 120, and the first linear power output unit 210 is fixedly installed on the bracket 121. The fixed position of the bracket 121 on the sliding seat 120 is arranged to be able to rotate around the axis of the output shaft 410.

[0047] By enabling the bracket 121 to rotate around the axis of the output shaft 410, that is, enabling the first linear power output unit 210 to rotate around the axis of the output shaft 410, different directions of radial loading force can be applied to the output shaft 410. For example, by enabling the bracket 121 to rotate within a range of 180°, and cooperating with the first linear power output unit 210 to apply a pushing force or a pulling force to the output shaft 410, radial loading force can be applied to the output shaft 410 within a range of 360°.

[0048] Specifically, referring to Figure 6 As shown in the figure, two long holes 201 are constructed on the sliding seat 120, and the center lines of the two long holes 201 are circular arcs, and the centers of the center lines are located on the axis of the output shaft 410. A plurality of threaded rods 122 are fixed on the bracket 121, and each threaded rod 122 can pass through the long hole 201 and be screwed with a nut, so as to fix the bracket 121 on the sliding seat 120. The fixed position of the bracket 121 on the sliding seat 120 can be adjusted around the axis of the output shaft 410 by adjusting the position of the threaded rod 122 in the long hole 201.

[0049] Referring to Figure 4 and Figure 6 As shown in the figure, the connecting body 420 of the embodiment includes a base 421, a connecting portion 422, and an elastic member 424. The base 421 is fixed on the output shaft 410, and a plurality of insertion holes 401 parallel to the axis of the output shaft 410 are arranged on the base 421. The connecting portion 422 is provided with an insertion rod 423 which can slide in each insertion hole 401. By sliding the insertion rod 423 in the insertion hole 401, the connecting portion 422 can slide on the base 421 along the axis of the output shaft 410. The elastic member 424 is installed in the insertion hole 401 to apply a pushing force to the connecting portion 422 to move the connecting portion 422 away from the base 421. The rotating ring 430 is rotatably arranged on the base 421, and the first rolling member 333 is fixedly arranged on the connecting portion 422.

[0050] Based on the above structure, when the axial loading unit 300 applies an axial loading force to the output shaft 410 through the first rolling member 333, the connecting portion 422 will first push the elastic member 424 to compress, so as to make the connecting portion 422 close to the base portion 421, thereby clamping the rotating ring 430 with the base portion 421 to limit the rotation of the rotating ring 430, so as to avoid the rotating ring 430 from rotating unexpectedly. Specifically, by arranging the rotating ring 430, when it is necessary to adjust the position of the support 121, i.e. the first linear power output unit 210, the first support member 332 on the rotating ring 430 can rotate with the support 121, so as to conveniently adjust the position of the support 121, i.e. the first linear power output unit 210. When the adjustment of the position of the support 121 is completed, if the rotating ring 430 is not fixed, when the first support member 332 is subjected to unbalanced force from the first linear power output unit 210, the first support member 332 will drive the rotating ring 430 to rotate, thereby affecting the radial loading force applied to the output shaft 410.

[0051] By arranging the above base portion 421 and connecting portion 422, when the test load test is performed, after the support 121 is adjusted to the appropriate position, the axial loading unit 300 can first apply an axial loading force to the output shaft 410 of the linear actuator 400, and the rotating ring 430 is fixed, and then the radial loading unit 200 can apply a radial loading force to the output shaft 410, which will not be affected by the rotation of the rotating ring 430.

[0052] Reference Figure 2 As shown in the figure, the load simulation system of the embodiment further comprises a displacement sensor 500 arranged on the rack 100 and located on one side of the sliding seat 120, and the sliding seat 120 is connected with the signal input end of the displacement sensor 500, so as to measure the displacement of the sliding seat 120 by the displacement sensor 500.

[0053] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A composite load simulation system for an actuator, characterized in that, include: A test bench (100) is provided with an actuator fixing part (110) and a sliding seat (120); the actuator fixing part (110) is used to fix the linear actuator (400) to be tested; the sliding seat (120) can slide on the test bench (100) along the axial direction of the output shaft (410) of the linear actuator (400); The radial loading unit (200) includes a first linear power output unit (210) disposed on the sliding seat (120), wherein the output rod (212) of the first linear power output unit (210) is perpendicular to the output shaft (410) and is used to apply radial force to the output shaft (410); The axial loading unit (300) includes a fixed base (310), a second linear power output unit (320), and a force transmission unit (330). The fixed base (310) is mounted on the platform (100), and the second linear power output unit (320) is located between the fixed base (310) and the sliding base (120), and is capable of pushing the sliding base (120) to slide. The force transmission unit (330) includes a force sensor (331), a first support member (332), and a first rolling member. (333) The force sensor (331) is fixed on the sliding seat (120). One of the first support member (332) and the first rolling member (333) is connected to the pressure-bearing part of the force sensor (331), and the other is disposed on the output shaft (410). The first support member (332) and the first rolling member (333) abut against each other, and the first rolling member (333) can roll radially relative to the first support member (332) along the output shaft (410).

2. The composite load simulation system for the actuator according to claim 1, characterized in that, It also includes a second support member (214) and a second rolling member (213); one of the second support member (214) and the second rolling member (213) is disposed on the end of the output rod (212), and the other is disposed on the output shaft (410); the second rolling member (213) abuts against the second support member (214), and the second rolling member (213) is capable of rolling relative to the second support member (214) along the axial direction of the output shaft (410).

3. The composite load simulation system for the actuator according to claim 2, characterized in that, A connecting body (420) is fixedly provided on the end of the output shaft (410), and a rotating ring (430) is rotatably provided on the connecting body (420); the first rolling element (333) is fixedly provided on the connecting body (420), and the second support element (214) is fixedly provided on the rotating ring (430); a bracket (121) is provided on the sliding seat (120), the first linear power output unit (210) is installed on the bracket (121), and the bracket (121) can rotate around the axis of the output shaft (410) at the fixed position on the sliding seat (120).

4. The composite load simulation system for the actuator according to claim 3, characterized in that, The connecting body (420) includes a base (421), a connecting portion (422), and an elastic member (424); the base (421) is fixed to the output shaft (410), the connecting portion (422) is slidable on the base (421) along the axial direction of the output shaft (410), and the elastic member (424) abuts against the base (421) and the connecting portion (422), and applies force to the connecting portion (422) to make the connecting portion (422) slide. The connecting part (422) is away from the thrust of the base (421); the rotating ring (430) is disposed on the base (421), and the first rolling element (333) is fixed on the connecting part (422); when the axial loading unit (300) applies an axial loading force to the output shaft (410), the connecting part (422) can slide close to the base (421) to clamp the rotating ring (430) with the base (421).

5. The composite load simulation system for the actuator according to claim 4, characterized in that, The base (421) is provided with a plurality of insertion holes (401), and the connecting part (422) is fixedly provided with a plurality of insertion rods (423). The insertion rods (423) are slidably inserted into the insertion holes (401). The elastic element (424) is a spring installed in the insertion holes (401). The spring abuts against the bottom surface of the insertion holes (401) and the insertion rods (423).

6. The composite load simulation system for the actuator according to claim 3, characterized in that, The sliding seat (120) has two elongated holes (201), the center lines of the two elongated holes (201) are arc-shaped, and the center of the center line is located on the axis of the output shaft (410); corresponding to each elongated hole (201), at least one screw (122) is fixed on the bracket (121), the screw (122) can pass through the corresponding elongated hole (201) and be screwed with a nut to fix the bracket (121) on the sliding seat (120).

7. The composite load simulation system for the actuator according to claim 1, characterized in that, The first support member (332) is connected to the input end of the force sensor (331), and the first support member (332) has a through hole whose length direction is perpendicular to the axial direction of the output shaft (410). The through hole has a through hole on the side wall near the linear actuator (400). The output shaft (410) is provided with a connecting rod that can be inserted into the through hole through the through hole. The first rolling member (333) is rotatably disposed on the end of the connecting rod.

8. The composite load simulation system for the actuator according to claim 1, characterized in that, The platform (100) is fixed with two parallel and spaced guide rails (130), and the sliding seat (120) is fixed with a slider that can slide on the two guide rails (130).

9. The composite load simulation system for the actuator according to claim 1, characterized in that, It also includes a displacement sensor disposed on the platform (100) and located on one side of the sliding seat (120), the sliding seat (120) being connected to the signal input terminal of the displacement sensor.

Images