Hydraulic actuator cylinder on-load laboratory environment performance testing device and method

Abstract

The invention belongs to the technical field of hydraulic actuator cylinder performance test design, and particularly relates to a hydraulic actuator cylinder on-load performance test device and method.The hydraulic actuator cylinder on-load performance test device comprises a bottom plate, a force bearing plate, a supporting plate, a support, a connecting beam, a screw, a force bearing beam and a spring; the bearing plate is vertically connected to one end of the bottom plate; the supporting plate is vertically connected to the other end of the bottom plate; the support is connected to the bottom plate, located between the force bearing plate and the supporting plate and used for containing the hydraulic actuator cylinder. The root of the cylinder body of the hydraulic actuating cylinder is hinged to the force bearing plate; the connecting beam is hinged to the end of a hydraulic actuator cylinder piston rod. The two screws are connected to the supporting plate, and the two nuts are arranged at the two ends of each screw respectively.

Description

Technical Field

[0001] The present application belongs to the technical field of hydraulic actuator performance test design, and specifically relates to a hydraulic actuator load performance test device and method. Background Art

[0002] The actuator used in the aircraft flight control system is usually a hydraulic servo actuator, which is mainly used to achieve closed-loop position control of the aileron, elevator, and rudder main control surfaces. Its working principle is that the electro-hydraulic servo valve receives the control command signal, which is hydraulically amplified and the output flow drives the actuator to move.

[0003] Currently, due to the difficulty in applying load, the performance test of hydraulic actuators is only carried out by placing them in different low-temperature or high-temperature environments to test the performance of the hydraulic actuators in different temperature environments, such as driving efficiency, sticking conditions, etc. However, in reality, the hydraulic actuator moves under load, and load is also an important factor affecting the performance of the hydraulic actuator besides temperature. It is difficult to comprehensively and accurately evaluate the performance of the hydraulic actuator only by the no-load movement of the hydraulic actuator in different temperature environments.

[0004] This application is proposed in view of the above-mentioned technical defects. Summary of the invention

[0005] The purpose of the present application is to provide a hydraulic actuator load performance testing device and method to overcome or alleviate at least one aspect of the known technical defects.

[0006] The technical solution of this application is:

[0007] On the one hand, a hydraulic actuator belt load performance test device is provided, including a base plate, a load-bearing plate, a support plate, a support, a connecting beam, a screw rod, a load-bearing beam, and a spring;

[0008] The load-bearing plate is vertically connected to one end of the bottom plate, and the support plate is vertically connected to the other end of the bottom plate;

[0009] The support is connected to the bottom plate and is located between the load-bearing plate and the support plate, and is used to place the hydraulic actuator; the root of the hydraulic actuator body is hinged on the load-bearing plate;

[0010] The connecting beam is hinged to the end of the piston rod of the hydraulic actuator;

[0011] There are two screw rods connected to the support plate, and two nuts are respectively arranged at both ends.

[0012] The two ends of the load-bearing beam are sleeved on two screw rods through through holes and are located between two pairs of nuts;

[0013] The spring is connected between the connecting beam and the load-bearing beam so as to apply a load to the hydraulic actuator through elastic force.

[0014] According to at least one embodiment of the present application, in the above-mentioned hydraulic actuator load performance testing device, the root of the hydraulic actuator body and the load-bearing plate are hinged by a single-double-ear structure in combination with a pin shaft.

[0015] According to at least one embodiment of the present application, in the above-mentioned hydraulic actuator load performance testing device, the base plate, load-bearing plate, support plate and bearing are an integrated structure, wherein the middle of the support plate is hollowed out to form a rectangular frame structure, and the bearing is a rectangular support frame structure.

[0016] According to at least one embodiment of the present application, in the above-mentioned hydraulic actuator load performance testing device, the connecting beam and the end of the hydraulic actuator piston rod are hinged by a single-double-ear structure with a pin.

[0017] According to at least one embodiment of the present application, in the above-mentioned hydraulic actuator load performance testing device, two screws are threadedly connected to the support plate.

[0018] According to at least one embodiment of the present application, in the above-mentioned hydraulic actuator load performance testing device, both ends of the spring are hooked in through holes opened on the load-bearing beam and the connecting beam.

[0019] According to at least one embodiment of the present application, in the above-mentioned hydraulic actuator load performance testing device, there are multiple groups of through holes opened on the spring and its load-bearing beam and connecting beam.

[0020] On the other hand, a method for testing the load performance of a hydraulic actuator is provided, which is implemented based on the above-mentioned device for testing the load performance of a hydraulic actuator, and comprises:

[0021] Step 1: Place the hydraulic actuator with load performance test device in the environmental chamber, and install the hydraulic actuator on the hydraulic actuator with load performance test device;

[0022] Step 2: By screwing the two pairs of nuts, adjust the load-bearing beam to move axially along the two screws, change the distance between the load-bearing beam and the connecting beam, adjust the preload state of the spring, and apply the required load to the hydraulic actuator;

[0024] Step 3: Set the temperature of the environmental chamber to normal temperature and perform a load performance test on the hydraulic actuator;

[0025] Step 4: Control the hydraulic actuator to return to its original position, set the temperature of the environmental chamber to the required temperature, and perform a load performance test on the hydraulic actuator;

[0026] Step 5: Control the hydraulic actuator to return to its original position, set the temperature of the environmental chamber to normal temperature, and after stabilization, perform a load performance test on the hydraulic actuator;

[0027] According to at least one embodiment of the present application, in the above-mentioned method for testing the load performance of the hydraulic actuator, in step 1, a bottom plate of the hydraulic actuator load performance testing device is fixed in an environmental chamber with bolts.

[0028] According to at least one embodiment of the present application, in the above-mentioned method for testing the load performance of the hydraulic actuator, in step two, first find the origin of the two pairs of nuts on the bolt so that the spring is not subjected to force, and then apply the required load to the hydraulic actuator and the elastic coefficient of the spring to calculate the position of the two pairs of nuts to be adjusted, and then tighten the two pairs of nuts according to the position.

[0029] According to at least one embodiment of the present application, in the above-mentioned method for testing the performance of the hydraulic actuator under load, before the performance test of the hydraulic actuator is performed, the spring is selected, specifically:

[0030] Determine the maximum load applied to the hydraulic actuator;

[0031] Determine the maximum stroke of the hydraulic actuator;

[0032] According to the maximum load applied to the hydraulic actuator, the maximum stroke and length of the hydraulic actuator, and the expected installation position in the hydraulic actuator load performance test device, the required elastic coefficient of the spring is calculated and the spring is selected.

[0033] According to at least one embodiment of the present application, in the above-mentioned method for testing the load performance of the hydraulic actuator, after the performance test of the hydraulic actuator is performed, the effect of temperature on the performance of the loaded hydraulic actuator is analyzed by comparing the results of the load performance test of the hydraulic actuator in steps three, four, and five.

[0034] This application has at least the following beneficial technical effects:

[0035] Provided are a hydraulic actuator load performance test device and method, which can realize the loaded movement of the hydraulic actuator in different temperature environments, realize the load performance test of the hydraulic actuator in different temperature environments, and be applied to the performance test of the hydraulic actuator of the aircraft flight control system. It can well restore the real working environment of the hydraulic actuator, can comprehensively and accurately evaluate the performance of the hydraulic actuator, and guide the design and improvement of the hydraulic actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of a hydraulic actuator load performance testing device provided in an embodiment of the present application;

[0037] Figure 2 It is a partial schematic diagram of a hydraulic actuator load performance testing device provided in an embodiment of the present application.

[0038] 1-base plate; 2-load-bearing plate; 3-support plate; 4-support; 5-connecting beam; 6-screw; 7-load-bearing beam; 8-spring; 9-hydraulic actuator.

[0039] In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be construed as limitations on the present application. DETAILED DESCRIPTION

[0040] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be described in further detail in detail and in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design.

[0041] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall have the usual meanings understood by those of ordinary skill in the art to which this application belongs. The words used in the description of this application to indicate orientation are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. The word "include" used in the description of this application indicates that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0042] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installation", "connection" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Technical personnel in the field can understand its specific meaning in this application according to the specific circumstances.

[0043] A hydraulic actuator with load performance testing device, such as Figure 1 As shown, it includes a base plate 1, a load-bearing plate 2, a support plate 3, a support 4, a connecting beam 5, a screw rod 6, a load-bearing beam 7, and a spring 8.

[0044] The bearing plate 2 is vertically connected to one end of the bottom plate 1 , and the supporting plate 3 is vertically connected to the other end of the bottom plate 1 .

[0045] The support 4 is connected to the bottom plate 1, between the bearing plate 2 and the support plate 3, and is used to place the hydraulic actuator 9. The root of the hydraulic actuator 9 is hinged on the bearing plate 2, and can be specifically designed to be hinged through a single-ear and double-ear structure with a pin shaft.

[0046] The bottom plate 1, the load-bearing plate 2, the support plate 3 and the support 4 can be designed as an integrated structure, wherein the bottom plate 1 can be designed as a double-beam parallel structure for weight reduction, the support plate 3 is hollowed out in the middle to form a rectangular frame structure, and the support 4 is a rectangular support frame structure.

[0047] The connecting beam 5 is hinged to the end of the piston rod of the hydraulic actuator 9, and can be specifically designed to be hinged through a single-ear and double-ear structure in combination with a pin shaft.

[0048] There are two screw rods 6 connected to the support plate 3, specifically they can be threadedly connected to the support plate 3, and two nuts are respectively arranged at both ends, which are not shown in the figure.

[0049] The two ends of the load-bearing beam 7 are sleeved on the two screw rods 6 through through holes and are located between the two pairs of nuts.

[0050] The spring 8 is connected between the connecting beam 5 and the load-bearing beam 7 so as to apply a load to the hydraulic actuator 9 through elastic force, simulating the load actually borne by the hydraulic actuator 9, thereby being able to test the load-carrying performance of the hydraulic actuator under different temperature environments.

[0051] In the hydraulic actuator load performance testing device disclosed in the above embodiment, the load-bearing beam 7 can be adjusted to move axially along the two screw rods 6 by screwing two pairs of nuts, so as to change the distance between the load-bearing beam 7 and the connecting beam 5, so that the spring 8 is in different pre-tightening states, so as to be able to adjust the load applied to the hydraulic actuator 9, thereby adapting to the performance testing of various types of hydraulic actuators.

[0052] In addition, in order to facilitate the replacement of springs 8 of different types and to further adapt to the test of the performance of various types of hydraulic actuators, the two ends of the spring 8 can be designed to be hooked in the through holes opened on the load-bearing beam 7 and the connecting beam 5, and the spring 8 can be designed to have multiple roots, specifically three roots, such as Figure 2 shown.

[0053] The performance test device for the hydraulic actuator with load disclosed in the above embodiment is used to test the performance of the hydraulic actuator, and the following method for testing the performance of the hydraulic actuator with load is used.

[0054] Before testing the performance of the hydraulic actuator, it is necessary to select the spring 8. The specific selection can be referred to as follows:

[0055] Determine the maximum load applied to the hydraulic actuator;

[0056] Determine the maximum stroke of the hydraulic actuator;

[0057] According to the maximum load applied to the hydraulic actuator, the maximum stroke and length of the hydraulic actuator, and the expected installation position in the hydraulic actuator load performance test device, the required elastic coefficient of the spring is calculated and the spring 8 is selected.

[0058] Step 1: Place the hydraulic actuator with load performance test device in the environmental chamber, and install the hydraulic actuator 9 on the hydraulic actuator with load performance test device.

[0059] The hydraulic actuator load performance test device can be fixed in the environmental chamber through the base plate 1 by bolts.

[0060] Both ends of the hydraulic actuator 9 are hinged on the bearing plate 2 and the connecting beam 5 through a single-double ear structure with a pin shaft, which can simulate the actual installation state of the hydraulic actuator 9.

[0061] The hydraulic pipeline for driving the hydraulic actuator 9 and the cable for transmitting the control command can be connected from outside the environmental test box.

[0062] The environmental chamber can be temperature-adjusted to change the temperature at which the hydraulic actuator 9 is driven, so that the performance of the hydraulic actuator 9 can be tested at different temperatures.

[0063] Step 2: By screwing the two pairs of nuts, the load-bearing beam 7 is adjusted to move axially along the two screw rods 6, the distance between the load-bearing beam 7 and the connecting beam 5 is changed, the preload state of the spring 8 is adjusted, and the required load is applied to the hydraulic actuator 9.

[0064] First, find the origin of the two pairs of nuts on the bolts so that the spring 8 is not subjected to force, and then apply the required load to the hydraulic actuator 9 and the elastic coefficient of the spring 8 to calculate the position where the two pairs of nuts should be adjusted, and then tighten the two pairs of nuts according to this position.

[0065] Step 3: Set the temperature of the environmental box to normal temperature and perform a load performance test on the hydraulic actuator 9.

[0066] Step 4: Control the hydraulic actuator 9 to return to its original position, set the temperature of the environmental box to the required temperature, and perform a load performance test on the hydraulic actuator 9.

[0067] After the temperature of the environmental box is set to the required temperature, it can be maintained for a period of time to allow the environment and the hydraulic actuator 9 to fully transfer heat.

[0068] The temperature of the environmental chamber is set to a required temperature, which can be a high temperature, such as 50° C., or a low temperature of -20° C., and the load performance test of the hydraulic actuator 9 can be repeatedly performed at different temperatures.

[0069] Step 5: Control the hydraulic actuator 9 to return to its original position, set the temperature of the environmental box to normal temperature, and after stabilization, perform a load performance test on the hydraulic actuator 9.

[0070] The influence of temperature on the performance of the hydraulic actuator 9 with load can be analyzed by comparing the results of the load performance test of the hydraulic actuator 9 in step three, step four, and step five.

[0071] The hydraulic actuator load performance testing device and method disclosed in the above-mentioned embodiment can realize the loaded movement of the hydraulic actuator in different temperature environments, realize the load performance testing of the hydraulic actuator in different temperature environments, and be applied to the performance testing of the hydraulic actuator of the aircraft flight control system. It can well restore the real working environment of the hydraulic actuator, comprehensively and accurately evaluate the performance of the hydraulic actuator, and guide the design and improvement of the hydraulic actuator.

[0072] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A hydraulic actuator load performance testing device, characterized in that: It comprises a bottom plate (1), a load-bearing plate (2), a support plate (3), a support (4), a connecting beam (5), a screw rod (6), a load-bearing beam (7), and a spring (8); The load-bearing plate (2) is vertically connected to one end of the bottom plate (1), and the support plate (3) is vertically connected to the other end of the bottom plate (1); The support (4) is connected to the bottom plate (1) and is located between the bearing plate (2) and the support plate (3) for placing the hydraulic actuator (9); the root of the hydraulic actuator (9) is hinged on the bearing plate (2); The connecting beam (5) is hinged to the end of the piston rod of the hydraulic actuator (9); There are two screw rods (6), which are connected to the support plate (3), and two nuts are respectively arranged at both ends; The two ends of the load-bearing beam (7) are sleeved on the two screw rods (6) through through holes and are located between the two pairs of nuts; The spring (8) is connected between the connecting beam (5) and the load-bearing beam (7) so as to be able to apply a load to the hydraulic actuator (9) through elastic force.

2. The hydraulic cylinder load performance testing device according to claim 1 is characterized in that: The root of the hydraulic actuator cylinder (9) and the load-bearing plate (2) are hingedly connected by a pin through a single-double-ear structure.

3. The hydraulic cylinder load performance testing device according to claim 2, characterized in that: The bottom plate (1), the load-bearing plate (2), the support plate (3) and the support seat (4) are an integrated structure, wherein the support plate (3) is hollowed out in the middle and is a rectangular frame structure, and the support seat (4) is a rectangular support frame structure.

4. The hydraulic cylinder load performance testing device according to claim 3 is characterized in that: The connecting beam (5) and the end of the piston rod of the hydraulic actuator (9) are hingedly connected by a pin through a single-double-ear structure.

5. The hydraulic cylinder load performance testing device according to claim 4, characterized in that: The two screw rods (6) are threadedly connected to the support plate (3).

6. The hydraulic cylinder load performance testing device according to claim 5, characterized in that: The two ends of the spring (8) are hooked in through holes provided on the load-bearing beam (7) and the connecting beam (5).

7. The hydraulic cylinder load performance testing device according to claim 6, characterized in that: There are multiple groups of through holes formed on the spring (8) and its load-bearing beam (7) and the connecting beam (5).

8. A method for testing the load performance of a hydraulic actuator, implemented based on the hydraulic actuator load performance testing device according to claim 1, characterized in that: include: Step 1: placing the hydraulic actuator with load performance test device in an environmental chamber, and installing the hydraulic actuator (9) on the hydraulic actuator with load performance test device; Step 2: by screwing the two pairs of nuts, the load-bearing beam (7) is adjusted to move axially along the two screw rods (6), the spacing between the load-bearing beam (7) and the connecting beam (5) is changed, the preload state of the spring (8) is adjusted, and the required load is applied to the hydraulic actuator (9); Step 3: Set the temperature of the environmental chamber to normal temperature and perform a load performance test on the hydraulic actuator (9); Step 4: Control the hydraulic actuator (9) to return to its original position, set the temperature of the environmental chamber to a required temperature, and perform a load performance test on the hydraulic actuator (9); Step 5: Control the hydraulic actuator (9) to return to its original position, set the temperature of the environmental box to normal temperature, and after stabilization, perform a load performance test on the hydraulic actuator (9).

9. The method for testing the load performance of a hydraulic actuator according to claim 8, characterized in that: In step 1, the bottom plate (1) of the hydraulic actuator with load performance testing device is fixed in the environmental chamber with bolts.

10. The method for testing the load performance of a hydraulic actuator according to claim 9, characterized in that: In step 2, first find the origin of the two pairs of nuts on the bolts so that the spring (8) is not subjected to force, then apply the required load to the hydraulic actuator (9) and calculate the elastic coefficient of the spring (8) to obtain the position where the two pairs of nuts should be adjusted, and then tighten the two pairs of nuts according to the position.

11. The method for testing the load performance of a hydraulic cylinder according to claim 10, characterized in that: Before testing the performance of the hydraulic actuator, the spring (8) is selected, specifically: Determine the maximum load applied to the hydraulic actuator; Determine the maximum stroke of the hydraulic actuator; According to the maximum load applied to the hydraulic actuator, the maximum stroke and length of the hydraulic actuator, and the expected installation position in the hydraulic actuator load performance test device, the required spring coefficient is calculated and the spring (8) is selected.

12. The method for testing the load performance of a hydraulic cylinder according to claim 11, characterized in that: After the performance test of the hydraulic actuator is carried out, the influence of temperature on the performance of the hydraulic actuator (9) with load is analyzed by comparing the results of the performance test of the hydraulic actuator (9) with load in step three, step four and step five.

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