A hydraulic actuator seal side load applying device

Abstract

This invention provides a sealing side load application device for a hydraulic actuator, comprising: a base plate (1), a pin (2), a slider support (3), a nut (4), a hydraulic actuator (5), a pin shaft (6), a nut (7), a support (8), a clamping block (9), a clamping block (10), a pin (11), a coupling block (12), a torque sensor (13), a torque loader (14), and a friction plate (15). When the hydraulic actuator (5) reciprocates, the torque loader (14) generates torque, driving the torque sensor (13), coupling block (12), clamping block (10), pin shaft (6), and clamping block (9) to rotate. The torque sensor (13) detects the torque applied to the hydraulic actuator (5). Adjusting the torque and the displacement of the reciprocating motion can achieve the application of sealing side loads of different magnitudes. It has the function of simulating the reciprocating motion side load effect of the hydraulic actuator and can realize quantitative and controllable loading of the sealing side load of the hydraulic actuator.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic sealing technology, specifically relating to a hydraulic actuator sealing side load application device. Background Technology

[0002] Hydraulic actuators are important execution components in aircraft flight control systems. They are connected to the fuselage and control surfaces at both ends, respectively. Driven by hydraulic pressure, they achieve reciprocating linear motion and power output, serving as support points and motion driving components for the aircraft wings.

[0003] Common hydraulic actuators and aircraft structures typically employ a point-to-point hinge at both ends. Ideally, the force or load operates along the line connecting the two hinge points and coincides with the actuator piston rod axis. However, in actual operation, factors such as manufacturing and assembly precision leading to deviations and angles between the force and the piston rod axis, frictional resistance at the hinge points, and the actuator's own gravity and inertia can generate lateral forces perpendicular to the piston rod axis in the actuator's reciprocating motion structure. These lateral forces can cause bending and torsion on the actuator structure and eccentric loading on the reciprocating sealing structure, significantly impacting the actuator's sealing performance and lifespan.

[0004] However, existing ground testing devices for hydraulic actuators often lack the function of applying lateral loads, or the applied lateral loads cannot be dynamically adjusted and controlled, failing to effectively simulate real-world operating conditions. This results in insufficient seal verification and difficulty in guaranteeing product service quality. Therefore, a device is needed that can dynamically and controllably apply lateral loads to the sealing structure of hydraulic actuators to achieve a more comprehensive and effective verification and evaluation of sealing characteristics. Summary of the Invention

[0005] This invention provides a hydraulic actuator sealing side load application device, which has the function of simulating the reciprocating motion side load effect of a hydraulic actuator and can realize quantitative and controllable loading of the hydraulic actuator sealing side load.

[0006] This invention provides a hydraulic actuator sealing side load application device, comprising: a base plate 1, a first pin 2, a slider support 3, a first nut 4, a hydraulic actuator 5, a pin shaft 6, a second nut 7, a support 8, a first clamping block 9, a second clamping block 10, a second pin 11, a coupling block 12, a torque sensor 13, a torque loader 14, and a friction plate 15; wherein:

[0007] The hydraulic actuator 5 is hinged to the slider support 3 by the first pin 2 and fastened by the first nut 4. The slider support 3 is connected to the base plate 1 and can move freely back and forth in a straight line.

[0008] The hydraulic actuator 5 is located between the first clamping block 9 and the second clamping block 10;

[0009] Friction plates 15 are embedded on the end faces of the first clamping block 9 and the second clamping block 10 facing the hydraulic actuator 5;

[0010] The pin 6 passes through the second clamping block 10, the hydraulic actuator 5, and the first clamping block 9 in sequence, and is fastened by the second nut 7;

[0011] The first clamping block 9 and the second clamping block 10 are mounted on the support 8, and the first clamping block 9 and the second clamping block 10 can rotate relative to the support 8;

[0012] Support 8 is fixedly connected to base plate 1;

[0013] The coupling block 12 is coaxially connected with the second clamping block 10 and is limited by the second pin 11 to prevent it from detaching;

[0014] The torque sensor 13 is located between the coupling block 12 and the torque loader 14. The torque sensor 13 is connected to the coupling block 12 via a flange, and the torque sensor 13 is connected to the torque loader 14 via a flange.

[0015] Torque loader 14 is fixedly connected to base plate 1;

[0016] When the hydraulic actuator 5 reciprocates under external control, the torque loader 14 generates torque, which drives the torque sensor 13, coupling block 12, second clamping block 10, pin 6, and first clamping block 9 to rotate. The torque sensor 13 detects the torque applied to the hydraulic actuator 5 through the friction plate 15. The adjustment of torque and reciprocating displacement enables the application of different sizes of sealing side load.

[0017] Optionally, there is a first mating plane 16 between the pin 6 and the first clamping block 9, a second mating plane 17 between the pin 6 and the second clamping block 10, and a third mating plane 18 between the coupling block 12 and the second clamping block 10.

[0018] Optionally, support 8 can be a two-ear structure;

[0019] The first clamping block 9 and the second clamping block 10 are respectively fitted into the holes of the two support lug structures;

[0020] One end of the second clamping block 10 is fitted onto the outside of the pin 6, and the other end is fitted onto the outside of the coupling block 12.

[0021] Optionally, the two friction plates 15 contact the two sides of the single-ear structure of the hydraulic actuator 5;

[0022] Furthermore, the inner diameter of the friction plate 15 is larger than the outer diameter of the bearing in the single-ear structure of the hydraulic actuator 5.

[0023] Optionally, the axes of slider support 3 and support 8 are parallel to each other and located on the same horizontal plane.

[0024] Optionally, the friction plate 15 is made of copper.

[0025] Optionally, the torque loader 14 is a torque motor.

[0026] Optionally, the hydraulic actuator 5 includes: a cylinder 19, a piston head seal 20, a piston rod seal 21, and a piston rod 22, wherein:

[0027] The piston rod 22 is coaxial with the cylinder 19, and the piston rod 22 and the cylinder 19 reciprocate relative to each other;

[0028] The piston head seal 20 is installed in the sealing groove of the piston rod 22, and has sealing contact and relative movement with the inner hole of the cylinder 19;

[0029] The piston rod seal 21 is installed in the sealing groove of the cylinder 19 and has sealing contact and relative movement with the outer circle of the piston rod 22.

[0030] The present invention provides a hydraulic actuator sealing side load application device. By controlling the bending torsion applied by the torque loader 14 and the reciprocating position of the hydraulic actuator 5, the sealing side load of the hydraulic actuator can be applied quantitatively and controllably as needed, thereby simulating the reciprocating side load effect of the hydraulic actuator. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a hydraulic actuator sealing side load application device according to the present invention;

[0032] Figure 2 This is a cross-sectional view of a partial connection structure of the hydraulic actuator of the present invention;

[0033] Figure 3 This is a schematic diagram of the hydraulic actuator of the present invention;

[0034] Explanation of reference numerals in the attached figures:

[0035] Base plate-1, first pin-2, slider support-3, first nut-4, hydraulic actuator-5, pin-6, second nut-7, support-8, first clamping block-9, second clamping block-10, second pin-11, coupling block-12, torque sensor-13, torque loader-14, friction plate-15, first mating plane-16, second mating plane-17, third mating plane-18, cylinder-19, piston head seal-20, piston rod seal-21, piston rod-22. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0038] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 1-3 As shown, the present invention provides a hydraulic actuator sealing side load application device, comprising: a base plate 1, a first pin 2, a slider support 3, a first nut 4, a hydraulic actuator 5, a pin shaft 6, a second nut 7, a support 8, a first clamping block 9, a second clamping block 10, a second pin 11, a coupling block 12, a torque sensor 13, a torque loader 14, a friction plate 15, a first mating plane 16, a second mating plane 17, and a third mating plane 18; wherein:

[0041] The hydraulic actuator 5 is hinged to the slider support 3 by the first pin 2 and fastened by the first nut 4;

[0042] The slider support 3 is connected to the base plate 1 and can move freely back and forth along a straight line.

[0043] The hydraulic actuator 5 is located between the first clamping block 9 and the second clamping block 10;

[0044] A friction plate 15 is installed between the hydraulic actuator 5 and the first clamping block 9;

[0045] A friction plate 15 is installed between the hydraulic actuator 5 and the second clamping block 10;

[0046] The pin 6 passes through the second clamping block 10, the hydraulic actuator 5, and the first clamping block 9 in sequence, and is fastened by the second nut 7;

[0047] There is a first mating plane 16 between the pin 6 and the first clamping block 9;

[0048] There is a second mating plane 17 between the pin 6 and the second clamping block 10;

[0049] There is a third mating plane 18 between the coupling block 12 and the second clamping block 10;

[0050] The first clamping block 9 and the second clamping block 10 are mounted on the support 8, and the first clamping block 9 and the second clamping block 10 can rotate relative to the support 8;

[0051] Support 8 is fixedly connected to base plate 1;

[0052] The coupling block 12 is coaxially connected with the second clamping block 10 and is limited by the second pin 11 to prevent it from detaching;

[0053] The torque sensor 13 is located between the coupling block 12 and the torque loader 14. The torque sensor 13 is connected to the coupling block 12 via a flange, and the torque sensor 13 is connected to the torque loader 14 via a flange.

[0054] Torque loader 14 is fixedly connected to base plate 1;

[0055] The hydraulic actuator 5, torque sensor 13, and torque loader 14 have external connection interfaces;

[0056] The hydraulic actuator 5 includes a cylinder 19, a piston head seal 20, a piston rod seal 21, and a piston rod 22, wherein:

[0057] The piston rod 22 is coaxial with the cylinder 19, and the piston rod 22 can reciprocate relative to the cylinder 19.

[0058] The piston head seal 20 is installed in the sealing groove of the piston rod 22, and has sealing contact and relative movement with the inner hole of the cylinder 19;

[0059] The piston rod seal 21 is installed in the sealing groove of the cylinder 19, and has sealing contact and relative movement with the outer circle of the piston rod 22;

[0060] The torque loader 14 is specifically a torque motor, but is not limited to a torque motor. It can also be a drive device with controllable torque output to provide the torque required for loading.

[0061] The friction plate 15 is made of copper, but is not limited to copper. It can also be other friction materials with low hardness and high coefficient of friction to ensure reliable transmission of friction torque in the connection structure while avoiding scratching other parts.

[0062] In this invention, the sealing structure of the hydraulic actuator 5 includes a piston head seal 20 and a piston rod seal 21. Under ideal working conditions, the sealing structure is subjected to balanced forces, and the sealing contact force is symmetrical along the axes of the cylinder 19 and the piston rod 22. Under actual working conditions, due to factors such as fitting precision and hinge friction, the hydraulic actuator may generate an equivalent bending torsion when reciprocating to drive the load, which will cause the sealing surfaces of the piston head seal 20 and the piston rod seal 21 to be subjected to a resultant lateral load perpendicular to the axes of the cylinder 19 and the piston rod 22. This invention provides a hydraulic actuator sealing lateral load application device that can simulate this equivalent bending torsion and realize the application of the hydraulic actuator sealing lateral load.

[0063] like Figure 1 As shown, in this invention, the hydraulic actuator 5 and the slider support 3 are hinged together by the first pin 2 and tightened by the first nut 4 at one end of the first pin. The slider support 3 is mounted on the base plate 1 and can move freely back and forth in a straight line. The connection formed between the hydraulic actuator 5 and the slider support 3 allows for free rotation and free reciprocating linear motion, and this connection end exerts no bending or torsional force on the hydraulic actuator 5.

[0064] In this invention, the hydraulic actuator 5 forms a fastening connection structure with the pin 6, the second nut 7, the first clamping block 9, and the second clamping block 10. The pin 6 passes through the second clamping block 10, the hydraulic actuator 5, and the first clamping block 9 in sequence, and the end of the pin 6 is threadedly connected to the second nut 7.

[0065] The pin 6 has a milled flat surface on its cylindrical surface, and the inner hole of the first clamping block 9 has a corresponding mating plane. The pin 6 and the first clamping block 9 form a shaft-hole fit, and the mating contact portion forms a mutually fitting first mating plane 16, which restricts the relative rotation of the pin 6 and the first clamping block 9. The large end of the pin 6 also has a milled flat surface, and the inner hole of the second clamping block 10 has a corresponding mating plane. The pin 6 and the second clamping block 10 form a shaft-hole fit, and the mating contact portion forms a mutually fitting second mating plane 17, which restricts the relative rotation of the pin 6 and the second clamping block 10. The structure of the first mating plane 16 and the second mating plane 17 ensures that the pin 6, the first clamping block 9, and the second clamping block 10 form a connection that prevents relative rotation.

[0066] After the end of the pin 6 is threadedly connected and tightened to the second nut 7, the hydraulic actuator 5 will form a squeezing friction with the first clamping block 9 and the second clamping block 10 respectively. The torque can be transmitted to the hydraulic actuator 5 through the friction force between the second clamping block 10 and the first clamping block 9. Friction plates 15 are also installed between the hydraulic actuator 5 and the first clamping block 9, and between the hydraulic actuator 5 and the second clamping block 10. The friction plates can ensure reliable and stable transmission of frictional torque while avoiding scratching other parts.

[0067] The first clamping block 9 and the second clamping block 10 are mounted on the support 8 and can rotate freely relative to the support 8. The support 8 is fixedly connected to the base plate 1. The hydraulic actuator 5, the pin 6, the second nut 7, the first clamping block 9, and the second clamping block 10 form a fastening connection structure with the support 8, which constitutes a hinge with a fixed hinge point, allowing relative rotation. The outer shafts of the first clamping block 9 and the second clamping block 10 both have shoulder structures to restrict axial movement.

[0068] In this invention, the torque loader 14 is fixedly connected to the base plate 1. The torque loader 14 and the torque sensor 13 are fixedly connected via a flange. The torque sensor 13 and the coupling block 12 are fixedly connected via a flange. The coupling block 12 and the second clamping block 10 are coaxially mated together and are limited and prevented from detaching by the second pin 11. The cylindrical surface of the coupling block 12 shaft has a milled flat surface, and the inner hole of the second clamping block 10 has a corresponding mating plane. The coupling block 12 and the second clamping block 10 form a mutually fitting third mating plane 18 to restrict relative rotation.

[0069] In this invention, the torque loader 14 has an external connection interface, which can generate the required rotational torque through external control. The generated rotational torque is transmitted sequentially through the torque sensor 13 and the coupling block 12 to a fastened connection structure formed by the pin 6, the second nut 7, the first clamping block 9, and the second clamping block 10, and then applied to the hydraulic actuator 5 through the friction plate 15, generating a bending moment on the hydraulic actuator 5. The torque sensor 13 can measure the applied torque, serving as feedback for external control adjustment.

[0070] The hydraulic actuator 5 has an external connection interface. When a bending moment is applied to the hydraulic actuator 5, the hydraulic actuator 5 can perform reciprocating linear motion through external control.

[0071] When the hydraulic actuator 5 is subjected to applied bending and torsion, the cylinder 19 and piston head seal 20 will generate a lateral load interaction force perpendicular to the axial direction, and the piston rod 22 and piston rod seal 21 will generate a lateral load interaction force perpendicular to the axial direction. Simultaneously, the hydraulic actuator 5 can be controlled to perform reciprocating linear motion, and the relative positions of the piston head seal 20 and piston rod seal 21 can be changed. Under the structural constraints of this device, the hydraulic actuator can only reciprocate linearly and is always in torque balance. According to the definition of torque, the applied torque is proportional to the lateral load force perpendicular to the axial direction generated by the sealing part and the axial distance of the sealing part. Therefore, by using the hydraulic actuator sealing lateral load application device of this invention, by controlling the bending and torsion applied by the torque loader 14 and the reciprocating position of the hydraulic actuator 5, the sealing lateral load of the hydraulic actuator can be quantitatively and controllably applied as needed, simulating the lateral load effect of the reciprocating motion of the hydraulic actuator.

[0072] The above-described embodiments are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be included within the scope of protection of the present invention.

Claims

1. A hydraulic actuator sealing side load application device, characterized in that, include: Base plate (1), first pin (2), slider support (3), first nut (4), hydraulic actuator (5), pin shaft (6), second nut (7), support (8), first clamping block (9), second clamping block (10), second pin (11), coupling block (12), torque sensor (13), torque loader (14), friction plate (15); wherein: The hydraulic actuator (5) and the slider support (3) are hinged by the first pin (2) and fastened by the first nut (4). The slider support (3) is connected to the base plate (1) and can move freely back and forth in a straight line. The hydraulic actuator (5) is located between the first clamping block (9) and the second clamping block (10); Friction plates (15) are embedded on the end faces of the first clamping block (9) and the second clamping block (10) facing the hydraulic actuator (5); The pin (6) passes through the second clamping block (10), the hydraulic actuator (5), and the first clamping block (9) in sequence, and is fastened by the second nut (7); The first clamping block (9) and the second clamping block (10) are mounted on the support (8), and the first clamping block (9) and the second clamping block (10) can rotate relative to the support (8); The support (8) is fixedly connected to the base plate (1); The coupling block (12) is coaxially connected with the second clamping block (10) and is limited by the second pin (11) to prevent it from detaching; The torque sensor (13) is located between the coupling block (12) and the torque loader (14). The torque sensor (13) is connected to the coupling block (12) through a flange, and the torque sensor (13) is connected to the torque loader (14) through a flange. Torque loader (14) is fixedly connected to base plate (1); When the hydraulic actuator (5) reciprocates under external control, the torque loader (14) generates torque, which drives the torque sensor (13), coupling block (12), second clamping block (10), pin (6), and first clamping block (9) to rotate. The torque sensor (13) detects the torque applied to the hydraulic actuator (5) through the friction plate (15). The adjustment of torque and displacement of reciprocating motion realizes the application of different sizes of sealing side load.

2. The hydraulic actuator sealing side load application device according to claim 1, characterized in that, There is a first mating plane (16) between the pin (6) and the first clamping block (9), a second mating plane (17) between the pin (6) and the second clamping block (10), and a third mating plane (18) between the coupling block (12) and the second clamping block (10).

3. The hydraulic actuator sealing side load application device according to claim 1, characterized in that, The support (8) has two lugs; The first clamping block (9) and the second clamping block (10) are respectively fitted into the holes of the two support lug structures; One end of the second clamping block (10) is fitted on the outside of the pin (6), and the other end is fitted on the outside of the coupling block (12).

4. The hydraulic actuator sealing side load application device according to claim 1, characterized in that, The two friction plates (15) are in contact with the two sides of the single-ear structure of the hydraulic actuator (5); Furthermore, the inner diameter of the friction plate (15) is larger than the outer diameter of the bearing in the single-ear structure of the hydraulic actuator (5).

5. The hydraulic actuator sealing side load application device according to claim 1, characterized in that, The axes of the slider support (3) and the support (8) are parallel to each other and are located on the same horizontal plane.

6. The hydraulic actuator sealing side load application device according to claim 1, characterized in that, The friction plate (15) is made of copper.

7. The hydraulic actuator sealing side load application device according to claim 1, characterized in that, The torque loader (14) is a torque motor.

8. The hydraulic actuator sealing side load application device according to claim 1, characterized in that, The hydraulic actuator (5) includes: a cylinder (19), a piston head seal (20), a piston rod seal (21), and a piston rod (22), wherein: The piston rod (22) is coaxial with the cylinder (19), and the piston rod (22) and the cylinder (19) reciprocate relative to each other; The piston head seal (20) is installed in the sealing groove of the piston rod (22) and has sealing contact and relative movement with the inner hole of the cylinder (19); The piston rod seal (21) is installed in the sealing groove of the cylinder (19) and has sealing contact and relative movement with the outer circle of the piston rod (22).

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