CN117589437A - Test device for testing multidirectional loading force of hydraulic damper - Google Patents
Test device for testing multidirectional loading force of hydraulic damper Download PDFInfo
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- CN117589437A CN117589437A CN202311801651.6A CN202311801651A CN117589437A CN 117589437 A CN117589437 A CN 117589437A CN 202311801651 A CN202311801651 A CN 202311801651A CN 117589437 A CN117589437 A CN 117589437A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
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- B64F5/60—Testing or inspecting aircraft components or systems
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Abstract
The invention discloses a test device for testing multidirectional loading force of a hydraulic damper, and relates to the technical field of damper testing. The method can be realized by the following technical scheme: the damper to be tested is connected with the load sensor through an elastic band thereof, is fixedly connected with the displacement sensor and the vertical actuating electric cylinder on the beam bracket bearing platform, and is used for realizing the fixation and loading of the damper to be tested in the vertical direction by feeding back corresponding displacement and load signals to the vertical direction adjustment of the force application point and the real-time parameter output, and respectively carrying out corresponding adjustment load and position adjustment in the horizontal direction and the vertical direction according to different test requirements together with the horizontal actuating electric cylinder; based on the displacement of the damper to be tested and the direct measurement of the loading force load of the displacement sensor, the working condition of the damper to be tested in the running process of the aircraft rotor system is simulated, a multidirectional loading force test is carried out on the damper to be tested, and the dynamic performance test and the durability test of the hydraulic damper are completed.
Description
Technical Field
The invention relates to the technical field of damper testing. In particular to a test device which is mainly used for testing the mechanical properties such as the work performance, the endurance fatigue, the fatigue life, the fatigue strength, the durability and the like in the endurance fatigue life test process of a hydraulic damper and is used for simulating centrifugal force load generated when a rotor wing rotates.
Background
The damper is a vibration control device sensitive to speed response, and is widely applied to pipelines and equipment of nuclear power plants, thermal power plants, chemical plants, steel plants and the like, and is used for controlling impact fluid vibration (such as impact disturbance of main valve quick closing, safety valve discharging, water hammer, pipe breaking and the like) and earthquake disturbance pipe system vibration. The damper is only one component, and has different damping effects when used in different places or in different working environments. Among the various applications currently exist: spring dampers, hydraulic dampers, pulse dampers, rotary dampers, wind dampers, viscous dampers, and the like. In the aeronautics industry, the damper is a key component of a helicopter structural system and is mainly used for providing damping for the shimmy motion of rotor blades, so that ground resonance and air resonance are prevented, and the margin of normal operation of a rotor is ensured. Helicopter rotor systems mainly employ two forms of dampers. One is a viscoelastic damper; the other is a hydraulic damper. The viscoelastic damper mainly absorbs the shimmy energy of the system by rubber elasticity, and has the defects that the natural frequency is related to the damping coefficient, different damping requirements are required to be adjusted by changing the structure of the viscoelastic damper, the rotating natural frequency of a rotor wing of a large helicopter is large, and if the viscoelastic damper is adopted, the large structure and the large volume are unacceptable.
The hydraulic damper mainly converts external vibration energy into heat energy to dissipate by using the orifice (gap) throttling principle, so that the purpose of damping is achieved, and different damping requirements can be adjusted by changing the size of the damping orifice (gap) without changing the external structure of the hydraulic damper. When the paddle swings back and forth about the vertical hinge, a reciprocating motion is generated between the shimmy damper housing and the piston rod. At this time, the oil in the shell flows into the gap between the shell and the piston or the throttle hole on the piston at a high speed, and the left and right sides of the piston generate pressure difference, so that the shimmy damping force is formed. Because the hydraulic damper rotates along with the propeller hub continuously in operation, the load is complex, and vibration is unavoidable. The reliability of the damper is critical to the operational stability of the overall rotor system. Therefore, the performance of the hydraulic damper must be checked before the hydraulic damper is connected with the impact vibration prevention device so as to ensure that the hydraulic damper with qualified performance is used for the device. However, in order to do so, a corresponding test stand needs to be studied. In order to detect the technical performance index of the hydraulic damper and the manufacturing quality of the hydraulic damper, a hydraulic damper test system must be built to perform performance test and quality detection on the hydraulic damper. In addition, in the development and production stage of the damper, endurance and fatigue tests are required to be carried out to verify the reliability and performance index of the damper in the design theory and optimize the structure of the damper. The current test of the hydraulic damper mainly comprises the following steps:
(1) The hydraulic damper runs at a low speed under a set speed to detect movement resistance. Namely: setting a speed, and drawing a low-speed movement resistance-time curve;
(2) And (5) testing the release speed of the hydraulic damper. Under the rated load, after the hydraulic damper control valve is in a closed state, the piston moving speed of the hydraulic damper control valve is detected. Namely: setting a load and drawing a speed-time curve;
(3) And (5) testing the dynamic rigidity of the hydraulic damper. Selecting a frequency in the frequency range of 1-33 Hz, setting the maximum load as the rated load, measuring the relation between the load and displacement, and drawing a curve.
(4) Durability and fatigue test. Detecting whether oil leakage exists in the piston rod dynamic seal of the hydraulic damper in N reciprocating motions, and evaluating the tightness and performance stability of the hydraulic damper;
the endurance test process is to apply a loading test with rated frequency and amplitude to the damper through a mechanical structure and hydraulic equipment on the ground, and to perform an accelerated life test of the full life cycle of the damper. Because the ground test conditions are limited, the flight condition can not be completely simulated when the endurance test of the damper is carried out, and especially, the eccentric load factors such as the centrifugal force generated when the damper is installed in the rotor system along with the high-speed rotation of the rotor system are not completely considered, so that a certain deviation exists between the test result and the actual situation. The existing test equipment has the defects that firstly, the analysis of the stress condition of the load of the damper is inaccurate, and the loading process is inconsistent with the actual working condition; secondly, the structure is complex, the installation and debugging process is complex, and the operation difficulty is high; thirdly, the system is unstable in operation, and the test equipment is poor in force loading operation reliability and frequent in fault; fourth, the force loading mechanism has poor compatibility and does not have the function of convenient adjustment and installation aiming at different damper tests. The hydraulic cylinder of the traditional direction-finding force loading test mechanism needs to be mechanically adjusted through a disassembly and assembly loading tool, and the hydraulic cylinder is controlled by a mechanical limiting mechanism, so that the hydraulic cylinder has the defect that a single-position lateral force loading mechanism can be realized only.
It should be noted that: the foregoing background and the description of the invention disclosed in this section of this application are only for the purpose of aiding in the understanding of the inventive concepts and technical solutions of the present invention and are not necessarily prior art to the present application, and should not be used to evaluate the novelty and creativity of the present application without explicit evidence that such content is already disclosed at the filing date of the present application.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the test device for testing the multidirectional loading force of the hydraulic damper, which is convenient to install and debug, strong in general compatibility and high in control precision, more accurately simulates the actual working condition of the hydraulic damper when an aircraft rotor system rotates, and can realize that the application point required by the endurance test process of the hydraulic damper applies the corresponding load lateral force loading test by controlling the hydraulic damper loading cylinder and horizontally and vertically actuating the electric cylinder.
The technical scheme adopted for solving the technical problems is as follows: a test device for testing a hydraulic damper for multidirectional loading force, comprising: the upper axial force loading fork ear joint 1 of the loading cylinder 14 and the lower axial force loading fork ear joint 4 fixed on the test bed are connected through four-column gantry top beam, and the clamping cylinders 8 fixedly connected to two ends of the beam bracket bearing platform 9 are characterized in that: the device comprises an axial constraint fixed seat 12 fixed on the vertical direction of a test bench guide post, a horizontal acting electric cylinder 7 is connected to a middle beam bracket bearing platform 9 through a horizontal loading hinge joint 13, the horizontal acting electric cylinder 7 is connected with a load sensor 5 through a horizontal loading hinge joint 6 on an electric push rod screw rod, the damper 2 to be tested is driven and regulated in the horizontal direction, the damper 2 to be tested is connected with the load sensor 5 through an elastic band 3 of the damper 2 to be tested, a displacement sensor 11 and a vertical acting electric cylinder 10 fixedly connected to the beam bracket bearing platform 9, and corresponding displacement and load signals are fed back to the vertical direction adjustment of a force application point and the output of real-time parameters, so that the fixation and loading of the damper 2 to be tested in the vertical direction are realized, and the corresponding adjustment load and position adjustment of the horizontal direction and the vertical direction are respectively carried out with the horizontal acting electric cylinder 7 according to different test requirements; based on the direct measurement of the displacement and loading force load of the to-be-measured damper 2 by the load sensor 5 and the displacement sensor 11, the working condition of the to-be-measured damper 2 in the running process of the aircraft rotor system is simulated, a multidirectional loading force test is carried out on the to-be-measured damper 2, and the dynamic performance test and the durability test of the hydraulic damper are completed.
Compared with the prior art, the invention has the following beneficial effects:
the installation and the debugging are simple and convenient. The invention aims at the problem that the damper is not provided with the functions of different damper tests and convenient adjustment and installation. The four-column gantry top beam is adopted to connect the upper axial force loading fork ear joint 1 of the loading cylinder 14, the lower axial force loading fork ear joint 4 fixed on the test bed, and the clamping cylinders 8 fixedly connected to the two ends of the beam bracket bearing platform 9 to carry out loading experiments on the damper to be tested, so that the structure is few, the installation is simple, quick and convenient. The axial restraint fixing seat 12 fixed on the test bench can drive and adjust the vertical direction of the vertical actuating cylinder 10, the beam bracket bearing platform 9 fixed on the test bench can drive and adjust the horizontal direction of the horizontal actuating cylinder 7 fixedly connected on the beam bracket bearing platform 9, and the device is convenient to install and debug, small in operation difficulty and high in reliability. When the hydraulic damper test is to be performed, the hydraulic damper is only required to be mounted on the test stand and adjusted to the required position for the test. And the load and the position adjustment in the horizontal direction and the vertical direction can be realized on the premise of not disassembling the clamping cylinder assembly tool.
According to the invention, the elastic band 3 is installed and connected to the tested liquid damper 2 by the axial connecting mechanism, and the clamping cylinders 8 are fixedly connected to the two ends of the beam bracket bearing platform 9, so that the defect that the hydraulic cylinder of the traditional direction finding force loading test mechanism needs to be subjected to mechanical position adjustment through the dismounting loading tool and is subjected to position control by the mechanical limiting mechanism, and the lateral force loading mechanism can only be realized at a single position because the dismounting loading tool is not needed for connecting the test piece is overcome.
The invention combines the axial connecting mechanism to connect the test piece, and ensures the consistency of the loading process and the actual working condition through the real-time data display of the load sensor 5 and the displacement sensor 11. The inaccuracy of the analysis of the load stress condition of the damper is overcome.
The universal compatibility is strong. Aiming at the problem of poor compatibility of the force loading mechanism in the prior art, the invention adopts two electric cylinders to respectively carry out corresponding adjustment in the horizontal direction and the vertical direction according to different test requirements, the stroke of the electric cylinders meets the adjustment range of a test bed, the requirement of the loading of the measuring force of different hydraulic dampers can be realized, the adjustment range is wide, the compatibility is strong, and the defect that the traditional lateral force loading mechanism can only realize the adjustment in the horizontal direction and the tool is required to be frequently replaced according to the disassembly and the assembly of different hydraulic dampers is overcome.
The control precision is high. According to the invention, the displacement sensor 11 and the vertical actuating electric cylinder 10 which are fixedly connected to the beam bracket bearing platform 9 are adopted, corresponding displacement and load signals are fed back to the vertical direction adjustment of the force application point and the real-time parameter output, so that the damper 2 to be tested is fixed and loaded in the vertical direction, and the damper and the horizontal actuating electric cylinder 7 can respectively carry out corresponding adjustment load and position adjustment in the horizontal direction and the vertical direction according to different test requirements; such vertically actuated and horizontally actuated cylinders 10, 7 more accurately simulate the damper operating conditions during operation of the aircraft rotor system.
The invention adopts the displacement sensor 11 and the load sensor 5 to directly measure the displacement and the load of the loading force, thereby avoiding the inaccuracy of indirect measurement of the traditional lateral force loading mechanism by adopting the vernier caliper in the debugging process. The method not only realizes the lateral force loading in the test process of the damper, but also ensures that the displacement and loading force load comprehensive control precision is within 3 percent. And the loading mode of converting the output force of the hydraulic cylinder into the lateral force is not needed.
The invention considers the eccentric load factors such as eccentric force generated by the damper installed in the rotor system along with the high-speed rotation of the rotor system. The method is characterized in that the load sensor 5 and the displacement sensor 11 are adopted to directly measure the displacement and the loading force load of the to-be-measured damper 2, the working condition of the to-be-measured damper 2 in the running process of an aircraft rotor system is simulated, a multidirectional loading force test is carried out on the to-be-measured damper 2, and the dynamic performance test and the durability test of the hydraulic damper are completed. The high-low speed large tonnage shaft pressure test and high-low speed shaftless pure shear test working conditions can be simultaneously met, and the high-low speed shaftless pure shear test working conditions can bear horizontal dynamic load and axial force load of 4000 kN. The problem of system operation instability, test equipment force loading operation reliability poor fault frequency is solved. Experimental results show that the bending moment load and the axial force load borne by the damper metal piece in the experimental simulation process are highly consistent with the loading values expected by theory, the load curve is smooth and smooth, no obvious quick return exists, the fatigue test loading of the damper metal piece meets the design requirement of mechanical movement, and the actual stress state of the test piece can be simulated more accurately.
The invention is suitable for the mechanical performance test of the durability, the fatigue strength, the fatigue life, the load fatigue, the reciprocating fatigue and the like of the damping shock absorber.
The present invention is further described below with reference to the drawings and examples, wherein the examples are provided as a few, but not all, examples of the present invention.
FIG. 1 is a front view of a multi-directional loading force testing mechanism of the present invention;
fig. 2 is a rear view of fig. 1.
FIG. 3 is a schematic diagram of the hydraulic principle of the test system;
in the figure: the hydraulic shock absorber comprises an upper axial force loading fork lug connector, a damper to be tested, an elastic band, a lower axial force loading fork lug connector, a load sensor, a lead screw horizontal loading hinge joint, a horizontal actuating electric cylinder, a clamping cylinder, a beam bracket bearing platform, a displacement sensor, an electric cylinder, a vertical actuating electric cylinder, an axial restraining fixed seat, a horizontal loading hinge joint, a loading cylinder, a hydraulic oil source, a servo valve group, a hydraulic vibration exciter, an energy accumulator group and a hydraulic vibration exciter, wherein the axial force loading fork lug connector is arranged on the upper axial force loading fork lug connector, the damper to be tested, the elastic band is arranged on the lower axial force loading fork lug connector, the axial force loading fork lug connector is arranged on the lower axial force limiting fixed seat, the axial force limiting fork lug connector is arranged on the lower axial force limiting fork lug connector is arranged on the upper axial force limiting fork lug connector, the lower axial force limiting fork connector is arranged on the lower axial force.
Description of the embodiments
See fig. 1-2. In a preferred embodiment described below, a test apparatus for testing a hydraulic damper for multidirectional loading force, comprising: the method comprises the steps that an upper axial force loading fork ear joint 1 of a loading cylinder 14 and a lower axial force loading fork ear joint 4 fixed on a test bed are connected through a top beam of a four-column gantry rack, and clamping cylinders 8 are fixedly connected to two ends of a beam bracket bearing platform 9, an axial constraint fixed seat 12 is fixed on the vertical direction of a test bed guide post, a horizontal actuating electric cylinder 7 is connected to a middle beam bracket bearing platform 9 through a horizontal loading hinge joint 13, the horizontal actuating electric cylinder 7 is connected with a load sensor 5 through a horizontal loading hinge joint 6 on an electric push rod screw rod, driving adjustment of the damper 2 to be tested in the horizontal direction is carried out, the damper 2 to be tested is connected with the load sensor 5 through an elastic belt 3 of the damper to be tested, corresponding displacement and load signals are fed back to the vertical direction adjustment and real-time parameter output of a force application point, so that the damper 2 to be tested is fixed and loaded in the vertical direction, and the corresponding adjustment load and position adjustment of the horizontal direction are respectively carried out according to different test requirements; based on the direct measurement of the displacement and loading force load of the to-be-measured damper 2 by the load sensor 5 and the displacement sensor 11, the working condition of the to-be-measured damper 2 in the running process of the aircraft rotor system is simulated, a multidirectional loading force test is carried out on the to-be-measured damper 2, and the dynamic performance test and the durability test of the hydraulic damper are completed.
In the embodiment, the horizontal electric cylinder 7 is connected with the load sensor 5 and the elastic band 3 fixedly connected with the load sensor 5 through the horizontal loading hinge joint 6, and the elastic band 3 is connected with the tested liquid damper 2, so that the horizontal direction adjustment and measurement of the lateral force are realized.
Based on the above embodiment, after the installation of the damper 2 to be tested for the test object is completed, the elastic band 3 is adjusted to the required position, the horizontal electric cylinder 7 is adjusted to the lateral force measuring point required by the hydraulic damper to be tested, and the vertical actuating electric cylinder 11 is adjusted to the force applying point required by the hydraulic damper to be tested, so as to realize the horizontal direction adjustment and measurement of the lateral force.
And the loading mode of converting the output force of the hydraulic cylinder into the lateral force is adopted to finish the current lateral force test. Meanwhile, the load sensor 5 and the displacement sensor 11 record and display the dynamic process of signals in real time, analyze data to obtain corresponding performance test results of the damper 2 to be tested, feed back corresponding displacement and load signals to an electrohydraulic servo control device of a hydraulic damper test system, and ensure the rapidness and accuracy of the test follow-up system through real-time data display of the load sensor 5.
The electrohydraulic servo system outputs a load force of at least 1000kN, the horizontal electric cylinder 7 and the vertical actuating electric cylinder 10 are utilized to drive the damper 2 to be tested, the load sensor 5 and the displacement sensor 11 perform real-time parameter feedback, the centrifugal force load generated by the hydraulic damper in the running process of the rotor wing system of the aircraft is accurately simulated, various fault conditions of the tested product in the structure tightness, mechanical deformation, fatigue fracture and the like are checked to the greatest extent, and therefore the accelerated life test process is realized.
In an alternative embodiment, in order to make the system have higher frequency response and control precision, according to the test requirement of the hydraulic damper and the specific technical index of the test system, the problems that the highest speed required by the test of the hydraulic damper is 314mm/s and the speed in the low-speed test is only 2-10 mm/s are considered, and the two problems are far apart. The electric control system can be considered to switch and control the two electrohydraulic servo valves according to the size, the tests are divided into a dynamic test and a static test, the dynamic test is used for a high-speed test, the static test is used for a low-speed test, and the large-flow electrohydraulic servo valve is used for completing the dynamic test; the small-flow electrohydraulic servo valve completes static test and can perform feedback closed-loop control by force or displacement.
Based on the embodiment, a large-flow electrohydraulic servo valve is selected in a dynamic test, a small-flow electrohydraulic servo valve is selected in a static test, the obtained current control signal is subjected to motor conversion, flow pressure which is proportional to the current control signal is output to drive a piston shaft in an actuating element of the hydraulic vibration exciter 17, the same motion or force output as the command signal is generated, and the position and force are respectively controlled through two feedback control loops to output force, displacement, speed and acceleration motion parameters. The high-flow electrohydraulic servo valve adopts a standard nozzle/baffle type two-stage servo valve to drive a three-stage electrohydraulic servo valve formed by a power amplifying stage, and the oil supply pressure of a pilot stage of the high-flow servo valve is regulated through a pressure reducing valve. The small-flow electrohydraulic servo valve selects a two-stage electrohydraulic servo valve with a spray-blocking structure of 40L/min under the pressure drop of 7MPa, and in order to isolate the large-flow electrohydraulic servo valve from the small-flow electrohydraulic servo valve and the hydraulic vibration exciter 17, hydraulic control one-way valves which control oil ports through electromagnetic directional valves and communicate oil paths between the selected servo valve and the hydraulic vibration exciter are respectively arranged.
The test device for controlling and testing the multidirectional loading force of the hydraulic damper can be adopted and comprises: the hydraulic damper test system comprises a test bed, a hydraulic vibration exciter 17 containing a displacement sensor and a force sensor, a hydraulic oil source 15, a hydraulic oil source energy accumulator group 18, a servo valve group 16 formed by a dynamic test high-flow electrohydraulic servo valve and a static test low-flow electrohydraulic servo valve, and a simulation control, numerical control, data acquisition, power supply and the like. The hydraulic pump supplies oil to the accumulator group 18 when the hydraulic vibration exciter 17 moves at a low speed, the hydraulic pump and the accumulator group 18 are combined to supply oil to the hydraulic vibration exciter 17 when the hydraulic vibration exciter 17 moves at a high speed, and the accumulator group 18 returns the oil through an oil return pipeline oil return filter, a low-pressure element-cooler communicated with the oil return pipeline and a connected hydraulic oil return tank.
In the electric control system, a hydraulic oil source 15 provides hydraulic energy, flow and pressure for an electrohydraulic servo valve, the oil source is controlled by a PLC (programmable logic controller), the start and stop of a hydraulic pump unit, the pressure adjustment, the selection of a test loop, the monitoring, alarming and safety protection of oil temperature, liquid level, oil pollution of a test system and the like are controlled, an alarm and safety protection are realized, a computer generates a control command signal to control, acquire and process the displacement and force output by a hydraulic vibration exciter, a displacement signal is processed into a speed signal or an acceleration signal is converted into a speed signal, the voltage command signal generated by the signal source or the computer is compared with a feedback signal in an adder to obtain an error signal, and the error signal is converted into a driving current signal after passing through a power amplifier and is applied to the electrohydraulic servo valve.
While the foregoing is directed to the preferred embodiment of the present invention, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (10)
1. A test device for testing a hydraulic damper for multidirectional loading force, comprising: the upper axial force loading fork ear joint (1) of the loading cylinder (14) and the lower axial force loading fork ear joint (4) fixed on the test bed are connected through four-column gantry top beam, and the clamping cylinders (8) are fixedly connected to two ends of the beam bracket bearing platform (9), and are characterized in that: the device comprises an axial constraint fixed seat (12) fixed on the vertical direction of a test bench guide post, a horizontal actuation electric cylinder (7) is connected to a middle beam bracket bearing platform (9) through a horizontal loading hinge joint (13), the horizontal actuation electric cylinder (7) is connected with a load sensor (5) through a horizontal loading hinge joint (6) on an electric push rod screw rod, the damper (2) to be tested is driven and regulated in the horizontal direction, the damper (2) to be tested is connected with the load sensor (5) through an elastic band (3) of the damper, a displacement sensor (11) and a vertical actuation electric cylinder (10) fixedly connected to the beam bracket bearing platform (9) are used for realizing the vertical direction adjustment of a force application point and the feedback of corresponding displacement and load signals of real-time parameters, and the fixation and loading of the damper (2) to be tested in the vertical direction are realized together with the horizontal actuation electric cylinder (7), and the corresponding adjustment load and position adjustment in the horizontal direction and the vertical direction are respectively carried out according to different test requirements; based on the direct measurement of the displacement and loading force load of the damper (2) to be tested by the load sensor (5) and the displacement sensor (11), the working condition of the damper (2) to be tested in the running process of the aircraft rotor system is simulated, the multidirectional loading force test is carried out on the damper (2) to be tested, and the dynamic performance test and the durability test of the hydraulic damper are completed.
2. The test device for testing the multidirectional loading force of a hydraulic damper according to claim 1, wherein: the horizontal electric cylinder (7) is connected with the load sensor (5) through the horizontal loading articulated joint (6) and the elastic band (3) fixedly connected with the load sensor (5), and the elastic band (3) is connected with the tested liquid damper (2) to realize the horizontal direction adjustment and measurement of the lateral force.
3. The test device for testing the multidirectional loading force of a hydraulic damper according to claim 1, wherein: after the installation of the damper (2) to be tested of the tested product is completed, the elastic band (3) is adjusted to a required position, the horizontal electric cylinder (7) is adjusted to a lateral force measuring point required by the hydraulic damper to be tested, and the vertical actuating electric cylinder (11) is adjusted to a force applying point required by the hydraulic damper to be tested, so that the horizontal direction adjustment and measurement of the lateral force are realized.
4. The test device for testing the multidirectional loading force of a hydraulic damper according to claim 1, wherein: the loading mode of converting the output force of the hydraulic cylinder into the side force is adopted to complete the current side force test, meanwhile, the load sensor (5) and the displacement sensor (11) record and display the dynamic process of signals in real time, data are analyzed to obtain the corresponding performance test result of the to-be-tested damper (2), the corresponding displacement and load signals are fed back to the electrohydraulic servo control device, and the speed and the accuracy of the test follow-up system are displayed through the real-time data of the load sensor (5).
5. The test device for testing the multidirectional loading force of a hydraulic damper according to claim 1, wherein: the electrohydraulic servo system outputs a load force of at least 1000kN, the horizontal electric cylinder (7) and the vertical actuating electric cylinder (10) are utilized to drive the damper (2) to be tested, the load sensor (5) and the displacement sensor (11) carry out real-time parameter feedback, the centrifugal force load generated by the hydraulic damper in the running process of the rotor system of the aircraft is accurately simulated, and various fault conditions of the tested object such as structural tightness, mechanical deformation, fatigue fracture and the like are examined to the greatest extent, so that the accelerated life test process is realized.
6. The test device for testing the multidirectional loading force of a hydraulic damper according to claim 1, wherein: the electric control system performs switching control according to the two electro-hydraulic servo valves, the test is divided into a dynamic test and a static test, the dynamic test is used for a high-speed test, the static test is used for a low-speed test, and the large-flow electro-hydraulic servo valve completes the dynamic test; the small-flow electrohydraulic servo valve completes static test, the dynamic test selects the large-flow electrohydraulic servo valve, the static test selects the small-flow electrohydraulic servo valve, the obtained current control signal is subjected to motor conversion, the flow pressure proportional to the current control signal is output, a piston shaft in an actuating element of the hydraulic vibration exciter (17) is driven, the same motion or force output as the command signal is generated, the position and force are respectively controlled through two feedback control loops, the force and displacement, the speed and acceleration motion parameters are output, and the force or displacement is subjected to feedback closed-loop control.
7. The test device for testing the multidirectional loading force of a hydraulic damper as recited in claim 6, wherein: the high-flow electrohydraulic servo valve adopts a standard nozzle/baffle type two-stage servo valve to drive a three-stage electrohydraulic servo valve formed by a power amplifying stage, the oil supply pressure of a pilot stage of the high-flow servo valve is regulated through a pressure reducing valve, the low-flow electrohydraulic servo valve adopts a two-stage electrohydraulic servo valve with a spray baffle structure with a rated flow rate under 7MPa valve pressure drop and 40L/min, and in order to isolate the high-flow electrohydraulic servo valve from the low-flow electrohydraulic servo valve from a hydraulic vibration exciter (17), hydraulic control one-way valves for controlling oil ports through electromagnetic reversing valves and communicating oil paths between the selected servo valve and the hydraulic vibration exciter are respectively arranged.
8. The test device for testing the multidirectional loading force of a hydraulic damper according to claim 1, wherein: the test device for controlling and testing the multidirectional loading force of the hydraulic damper comprises: the hydraulic damper test system comprises a test bed, a hydraulic vibration exciter (17) with a displacement sensor and a force sensor, a hydraulic oil source (15), a hydraulic oil source energy accumulator group (18), a servo valve group (16) formed by a dynamic test high-flow electrohydraulic servo valve and a static test low-flow electrohydraulic servo valve, and a hydraulic damper test system formed by analog control, numerical control, data acquisition and a power supply.
9. The test device for testing the multidirectional loading force of a hydraulic damper according to claim 1, wherein: the hydraulic pump supplies oil to the energy accumulator group (18) when the hydraulic vibration exciter (17) moves at a low speed, the hydraulic pump and the energy accumulator group (18) supply oil to the hydraulic vibration exciter (17) in a combined way when the hydraulic vibration exciter (17) moves at a high speed, and the energy accumulator group (18) returns the oil through an oil return pipeline oil return filter, a low-pressure element-cooler communicated with the oil return pipeline oil return filter and a connected hydraulic oil return tank.
10. The test device for testing the multidirectional loading force of a hydraulic damper according to claim 1, wherein: in the electric control system, a hydraulic oil source (15) provides hydraulic energy, flow and pressure for an electrohydraulic servo valve, the oil source is controlled by a PLC (programmable logic controller), the start and stop of a hydraulic pump unit, the pressure adjustment, the selection of a test loop, the monitoring of oil temperature, liquid level and oil pollution of a test system, the alarm and the safety protection are controlled, a computer generates a control command signal to control, collect and process the displacement and force output by a hydraulic vibration exciter, a displacement signal is processed into a speed signal or an acceleration signal is converted into a speed signal, the voltage command signal generated by the signal source or the computer is compared with a feedback signal in an adder to obtain an error signal, and the error signal is converted into a driving current signal after passing through a power amplifier and is applied to the electrohydraulic servo valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311801651.6A CN117589437A (en) | 2023-12-25 | 2023-12-25 | Test device for testing multidirectional loading force of hydraulic damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202311801651.6A CN117589437A (en) | 2023-12-25 | 2023-12-25 | Test device for testing multidirectional loading force of hydraulic damper |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118329429A (en) * | 2024-06-13 | 2024-07-12 | 烟台航空液压控制有限责任公司 | Dynamic test device for hydraulic damper |
| CN118464421A (en) * | 2024-07-11 | 2024-08-09 | 江苏鼎吉能源工程技术有限公司 | A damper loading force test tool |
| CN118669392A (en) * | 2024-08-22 | 2024-09-20 | 武汉理工大学 | Compression ratio consistency testing device and testing method for each cylinder of marine low-speed machine |
| CN118905636A (en) * | 2024-10-10 | 2024-11-08 | 四川中志融创科技有限公司 | Damper assembly system |
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2023
- 2023-12-25 CN CN202311801651.6A patent/CN117589437A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118329429A (en) * | 2024-06-13 | 2024-07-12 | 烟台航空液压控制有限责任公司 | Dynamic test device for hydraulic damper |
| CN118464421A (en) * | 2024-07-11 | 2024-08-09 | 江苏鼎吉能源工程技术有限公司 | A damper loading force test tool |
| CN118464421B (en) * | 2024-07-11 | 2024-09-13 | 江苏鼎吉能源工程技术有限公司 | Damper loading force test tool |
| CN118669392A (en) * | 2024-08-22 | 2024-09-20 | 武汉理工大学 | Compression ratio consistency testing device and testing method for each cylinder of marine low-speed machine |
| CN118905636A (en) * | 2024-10-10 | 2024-11-08 | 四川中志融创科技有限公司 | Damper assembly system |
| CN118905636B (en) * | 2024-10-10 | 2024-12-06 | 四川中志融创科技有限公司 | A damper assembly system |
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