CN104879348A - Hydraulic pipeline vibration test simulation experiment platform - Google Patents
Hydraulic pipeline vibration test simulation experiment platform Download PDFInfo
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- CN104879348A CN104879348A CN201510142179.9A CN201510142179A CN104879348A CN 104879348 A CN104879348 A CN 104879348A CN 201510142179 A CN201510142179 A CN 201510142179A CN 104879348 A CN104879348 A CN 104879348A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/007—Simulation or modelling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic pipeline vibration test simulation experiment platform which comprises a vibration exciting unit, a hydraulic power unit, a sensor detection system, a control unit and a signal collecting and processing unit. The vibration exciting unit comprises a workbench and an industrial control computer, two vibration platforms are placed on the workbench, a to-be-tested pipeline is fixed on the vibration platforms, an accelerometer, a strain gauge and an optical fiber grating sensor are mounted in the to-be-tested pipeline, the hydraulic power unit is provided with a proportional flow valve, a proportional overflow valve and a digital switch valve, the sensor detection system comprises a temperature sensor and a pressure sensor which are both arranged on the vibration platforms, and the signal collecting and processing unit is connected with the sensor detection system and a sensor in the hydraulic power unit. The hydraulic pipeline vibration test simulation experiment platform can simulate vibration of a hydraulic pipeline mounting base and changing of temperature, flow and pressure of fluid in a pipeline, and has wide application prospect in the field of petrochemical industry, water conservancy, machinery and aerospace.
Description
Technical field
The present invention relates to hydraulic pipe line vibration-testing simulation experiment platform, particularly relate to the experiment porch that matrix vibration and internal flow exciting are installed by the simulation slim pipe diameter hydraulic pipe line external world.
Background technique
Hydraulic pipe line vibration-testing simulation experiment platform is a kind of experimental facilities slim pipe diameter hydraulic pipe line being carried out to vibration simulation, comprise and matrix vibration and flow induced vibrations are installed, can the vibration performance of analysis of pipeline by such vibration experiment, the vibration mechanism of research pipeline, provides rational basis for analyzing hydraulic pipe line vibration fault.Therefore, this experiment porch will be with a wide range of applications in fields such as machinery, chemical industry, water conservancy and Aero-Space.
At present, existing fluid hydraulic pipe line vibration testing device, or only by regulating the parameters such as the pressure of fluid in pipeline and flow, obtaining different laboratory datas, carrying out pipeline vibration specificity analysis; Or only vibrated by analog basis, and the pressure ignored fluid in pipeline and the isoparametric adjustment of flow, this reduced form can not embody the indeed vibrations situation of fluid hydraulic pipe line completely.
At present, electrical measuring method, comprises accelerometer, resistance strain gauge etc., is the main method of fluid hydraulic pipe line monitoring.And electrical measuring method also exists the narrow limitation such as poor anti jamming capability, distributed arrangement is difficult, signal transmission distance is limited, be difficult to realize the multi-parameter of fluid piping system, multiple physical field, distributions detect, seriously constrain the development of the reliability analysis of pipe-line system, dynamic optimization design and security maintenance technology, therefore need the sensing detection techniques and methods adopting some new.
Summary of the invention
The problem of the indeed vibrations situation of fluid hydraulic pipe line can not be embodied completely for existing fluid hydraulic pipe line vibration testing device, and the narrow limitation of current pipeline detecting method, the present invention is according to the actual working environment of fluid hydraulic pipe line, propose a kind of experimental setup that more truly can reflect the analog stream body hydraulic pipe line vibration environment of tested pipeline vibration performance, with the research needs of the vibration mechanism and vibration fault feature that meet convection cell hydraulic pipe line.
The technical solution adopted for the present invention to solve the technical problems is:
There is provided a kind of hydraulic pipe line vibration-testing simulation experiment platform, involving vibrations exciting unit, hydraulic power unit, sensing and detecting system, control unit and signal acquisition process unit;
Described vibrational excitation unit comprises worktable and process control machine, two vibrating tables is placed by worktable, vibrating table is fixed pipeline to be tested, be provided with accelerometer, resistance strain gauge and fiber-optic grating sensor in described pipeline to be tested; Described process control machine is connected with described signal acquisition process unit;
Described hydraulic power unit is provided with proportional flow control valve and proportional pressure control valve, for regulating flow and the pressure parameter of liquid in pipeline to be measured; This hydraulic power unit is also provided with number switch valve, for simulating the hydraulic pulsation in pipeline under different pressures; Described proportional flow control valve, described proportional pressure control valve are all connected with control unit with described number switch valve;
Described sensor detecting system comprises temperature transducer and pressure transducer, all arranges on a vibration table;
Described signal acquisition process unit, is connected with the sensor in described sensor detecting system, described hydraulic power unit.
In hydraulic pipe line vibration-testing simulation experiment platform of the present invention, described vibrating table is provided with accelerometer and resistance strain gauge, all be connected by data signal line with described signal acquisition process unit, described accelerometer is for measuring the acceleration signal of pipeline to be measured, and described resistance strain gauge and fiber-optic grating sensor are for measuring the dynamic strain signal of pipeline to be measured.
In hydraulic pipe line vibration-testing simulation experiment platform of the present invention, described hydraulic power unit also comprises motor, plunger pump, cooler and fuel tank, motor is connected with plunger pump, oil absorption filter is provided with between the filler opening and inlet port of plunger pump, the oil outlet of plunger pump is connected with accumulator switch, accumulator and pressure transducer, and is connected with the filler opening of an one-way valve; The oil outlet of cooler is connected with fuel tank.
In hydraulic pipe line vibration-testing simulation experiment platform of the present invention, heater and temperature transducer are installed in described fuel tank.
In hydraulic pipe line vibration-testing simulation experiment platform of the present invention, described control unit comprises touch screen and PLC, and the input end of PLC is connected with the output terminal of touch screen.
Described hydraulic pipe line vibration-testing simulation experiment platform, it is characterized in that, described signal acquisition process unit comprises data collecting card, fiber Bragg grating (FBG) demodulator and current transducer, sensor in hydraulic power unit is connected with the input end of current transducer respectively by data signal line, and the input end of data collecting card is connected with the output terminal of current transducer; Fiber-optic grating sensor is connected with the input end of fiber Bragg grating (FBG) demodulator by optical fiber.
In hydraulic pipe line vibration-testing simulation experiment platform of the present invention, described vibrational excitation unit also comprises signal source and power amplifier, the input end of signal source is connected with the output terminal of process control machine, the output terminal of signal source is connected with the input end of power amplifier, and the output terminal of power amplifier is connected with the input end of vibrating table.
In hydraulic pipe line vibration-testing simulation experiment platform of the present invention, described worktable is T stage.
The beneficial effect that the present invention produces is: fluid hydraulic pipe line vibration-testing simulation experiment platform of the present invention, by the output waveform simulation pipeline controlling vibrating table, matrix vibration performance is installed, the mounting characteristic of analog stream body hydraulic pipe line simultaneously, the flow of passing ratio Flow valve and proportional overflow valve regulation feed line and pressure, utilize the fluid pulsation in number switch valve simulation pipeline, using optical fibre grating measures the dynamic strain of pipeline simultaneously.The present invention can the vibration environment of analog stream body hydraulic pipe line well, is further investigation fluid hydraulic pipe line Vibrations and fault diagnosis, and pipeline detection technique and method provide experimental condition.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of experimental apparatus for testing of the present invention;
Fig. 2 is the schematic diagram of hydraulic power unit in the present invention;
Fig. 3 is the schematic diagram of control unit in the present invention;
Fig. 4 is the schematic diagram of signal acquisition process unit in the present invention;
In Fig. 1: 1, hydraulic power unit, 2, hydraulic hose, 3, T stage, the 4, first temperature transducer, 5, the first pressure transducer, 6, small vibrating platform, 7, accelerometer on vibrating table, 8, pipe collar, 9, accelerometer on tested pipeline, 10, fiber-optic grating sensor, 11, tested pipeline, 12, resistance strain gauge, 13, the second pressure transducer, 14, flow transducer, 15, base, 16, signal acquisition process unit, 17, process control machine, 18, signal source, 19, power amplifier, 20, data signal line;
In Fig. 2: 21, heater, 22, oil absorption filter, 23, fuel tank, 24, level meter, 25, air filter, 26, second temperature transducer, 27, plunger pump, 28, 3rd pressure transducer, 29, one-way valve, 30, accumulator switch, 31, accumulator, 32, relief valve, 33, high pressure filter, 34, solenoid directional control valve, 35, first pressure meter switch, 36, first pressure gauge, 37, first electromagnet cut off valve, 38, second electromagnet cut off valve, 39, proportional flow control valve, 40, number switch valve, 41, 3rd electromagnet cut off valve, 42, 4th electromagnet cut off valve, 43, second pressure meter switch, 44, second pressure gauge, 45, proportional pressure control valve, 46, cooler,
In Fig. 3: 47, PLC, 48, touch screen;
In Fig. 4: 49, current transducer, 50, data collecting card, 51, netting twine, 52, fiber Bragg grating (FBG) demodulator, 53, optical fiber.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, the fluid hydraulic pipe line vibration-testing simulation experiment platform of present pre-ferred embodiments, comprises hydraulic power unit 1, vibrational excitation unit, signal acquisition process unit 16 and control unit.Wherein, vibrational excitation unit comprises process control machine 17, signal source 18, power amplifier 19 and two vibrating table 6(can adopt small vibrating platform), the output terminal of process control machine 17 is connected with the input end of signal source 18, the output terminal of signal source 18 is connected with power amplifier 19 input end, the output terminal of power amplifier 19 is connected with the input end of small vibrating platform 6, small vibrating platform 6 is provided with the pipe collar 8 of accelerometer 7 and the tested pipeline of installation, is fixed on T stage 3 bottom small vibrating platform 6; Described tested pipeline is provided with accelerometer 9, fiber-optic grating sensor 10 and resistance strain gauge 12; On described vibrating table, on accelerometer 7, measured tube, accelerometer 9, fiber-optic grating sensor 10 and resistance strain gauge 12 are connected respectively by the input end of data signal line with signal acquisition process unit 16, and the output terminal of signal acquisition process unit 16 is connected with the input end of process control machine 17;
By regulating the relative position of vibrating table 6, the change of tested pipeline fixed position can be realized; By the pipe collar regulating the relative position of two vibrating tables 6 different with design, the installation of the tested pipeline of difformity different size can be realized; By designing different pipe collars, the embodiment of the present invention can install and measure many tested pipelines simultaneously.
As shown in Figure 2, described hydraulic power unit 1 comprises motor, plunger pump 27, one-way valve 29, accumulator 31, relief valve 32, high pressure filter 33, solenoid directional control valve 34, first electromagnet cut off valve 37, second electromagnet cut off valve 38, the 3rd electromagnet cut off valve 41, the 4th electromagnet cut off valve 42, proportional flow control valve 39, number switch valve 40, proportional pressure control valve 45, first pressure transducer 5, second pressure transducer 13, the 3rd pressure transducer 28, flow transducer 14, first temperature transducer 4 and the second temperature transducer 26 etc.
Motor is connected with plunger pump 27, oil absorption filter 22 is provided with between the filler opening and inlet port of plunger pump 27, the oil outlet of plunger pump 27 is connected with accumulator switch 30, accumulator 31 and the 3rd pressure transducer 28, and is connected with the filler opening of one-way valve 29; The oil outlet of one-way valve 29 is connected with the filler opening of high pressure filter 33 with relief valve 32, and the oil outlet of relief valve 32 is connected with cooler 46 filler opening, and the oil outlet of cooler 46 is connected with fuel tank 23; The oil outlet of high pressure filter 33 is connected with the filler opening of solenoid directional control valve 34, and the oil outlet of solenoid directional control valve 34 is connected with cooler 46 filler opening; Actuator port on the left of solenoid directional control valve 34 is connected with the hydraulic hose in left side, in in-line, be connected with the first pressure meter switch 35, first pressure gauge 36, first electromagnet cut off valve 37, second electromagnet cut off valve 38, the 3rd electromagnet cut off valve 41, the 4th electromagnet cut off valve 42, number switch valve 40, proportional flow control valve 39, first temperature transducer 4 and the first pressure transducer 5, number switch valve 40 and proportional throttle valve 39 parallel connection, and the filler opening of two valves and oil outlet are respectively connected an electromagnet cut off valve; The actuator port on the right side of solenoid directional control valve 34 is connected with the hydraulic hose on right side, in return line, is connected with flow transducer 14, second pressure transducer 13, second pressure meter switch 43, second pressure gauge 44 and proportional pressure control valve 45; On fuel tank 23, heater 21 and the second temperature transducer 26 are installed; The first pressure transducer 5, second pressure transducer 13 in described hydraulic power unit 1, the 3rd pressure transducer 28, flow transducer 14, first temperature transducer 4 are connected respectively by the input end of data signal line with signal acquisition process unit 16 with the second temperature transducer 26; The heater 21 of described hydraulic power unit 1, solenoid directional control valve 34, first electromagnet cut off valve 37, second electromagnet cut off valve 38, the 3rd electromagnet cut off valve 41, the 4th electromagnet cut off valve 42, proportional flow control valve 39, number switch valve 40 are connected with control unit respectively by data signal line 20 with proportional pressure control valve 45.
As shown in 3 figure, described control unit comprises touch screen 48, PLC 47.The heater 21 of hydraulic power unit 1, solenoid directional control valve 34, first electromagnet cut off valve 37, second electromagnet cut off valve 38, the 3rd electromagnet cut off valve 41, the 4th electromagnet cut off valve 42, proportional flow control valve 39, number switch valve 40 and proportional pressure control valve 45, be connected with the output terminal of the PLC 47 of control unit respectively, the input end of PLC 47 is connected with the output terminal of touch screen 48.
As shown in Figure 4, described signal acquisition process unit 16 comprises data collecting card 50, fiber Bragg grating (FBG) demodulator 52 and current transducer 49.Accelerometer 7 on vibrating table 6, accelerometer 9 on tested pipeline and resistance strain gauge 12, and the first pressure transducer 5, second pressure transducer 13, the 3rd pressure transducer 28 of hydraulic power unit 1, flow transducer 14, first temperature transducer 4 and the second temperature transducer 26, be connected respectively by the input end of data signal line 20 with the current transducer 49 of signal acquisition process unit, the output terminal of current transducer 49 is connected with the input end of data collecting card 50; Optical fiber grating sensing 10 is connected by the input end of optical fiber 53 with fiber Bragg grating (FBG) demodulator 52, and the output terminal of fiber Bragg grating (FBG) demodulator 52 is connected by the input end of netting twine 51 with process control machine 17.
Before test, first, according to the installation form of fluid hydraulic pipe line, determine the position of two small vibrating platforms, and by the pipe collar on vibration table, tested pipeline is fixed, then the hydraulic hose of hydraulic power unit is connected with tested pipeline by quick release coupling.In test process, utilize process control machine control signal generator to simulate the oscillating signal of pipeline installation matrix, and use accelerometer measures vibrating table on vibrating table to export to the oscillating signal of tested pipeline.Accelerometer on tested pipeline is for measuring the acceleration signal of pipeline, and the resistance strain gauge on tested pipeline and fiber-optic grating sensor are for measuring the dynamic strain signal of pipeline.
Hydraulic power unit of the present invention is two-way control loop, has been installed in parallel number switch valve and proportional flow control valve, in return line, is provided with proportional pressure control valve in in-line.When proportional flow control valve access in-line, by PLC control ratio Flow valve, regulate the fluid flow entering tested pipeline, by PLC control ratio relief valve, regulate the hydrodynamic pressure entering tested oil pipe; When number switch valve access in-line, by PLC control figure switch valve and proportional pressure control valve, realize the hydraulic pulsation under different pressures.
The present invention is according to the vibration fault pattern of fluid hydraulic pipe line reality, namely pipeline installation matrix and pipeline coupled vibrations cause pipeline excessive, the Coupling effect of seepage rock deformation that channel interior hydraulic pulsation causes causes pipeline vibration excessive, and pipe collar to loosen the pipeline vibration caused excessive etc., vibration fault reproduction and the vibration performance analysis of above-mentioned three kinds of pipelines can be simulated by the present invention.
(1) waveform of vibrating table is input to by process control machine control signal source, make Research on Shaking Table for Simulating pipeline that the vibration performance of matrix is installed, because tested pipeline is fixed on vibration table by pipe collar, just make tested pipeline possess the vibration performance of vibrating table simultaneously.By the fluid pressure of tested pipeline and the adjustment of flow parameter, make vibrating table exciting simultaneously, thus realize the coupled vibrations between tested pipeline and vibrating table, namely simulate the coupled vibrations between pipeline installation matrix and hydraulic pipe line;
(2) when vibrating table encourages tested pipeline, by PLC control figure switch valve and proportional pressure control valve, complete the impact of the hydraulic pulsation under different pressures on pipeline, realize the fluid structurecoupling of tested pipeline and pipeline inner fluid;
(3) when vibrating table encourages tested pipeline, by controlling the pretightening force of connecting bolt on pipe collar, the loosening situation of simulation pipe collar.By the fluid pressure of tested pipeline and the adjustment of flow parameter, realize pipe collar and loosen the pipeline vibration caused.
Fluid hydraulic pipe line vibration-testing simulation experiment platform involved in the present invention, by the output waveform simulation pipeline controlling vibrating table, matrix vibration performance is installed, the mounting characteristic of analog stream body hydraulic pipe line simultaneously, the flow of passing ratio Flow valve and proportional overflow valve regulation feed line and pressure, utilize the fluid pulsation in number switch valve simulation pipeline, apply the dynamic strain of resistance strain gauge and fiber-optic grating sensor measurement pipeline simultaneously.The present invention is intended to the vibration environment of analog stream body hydraulic pipe line, is further investigation fluid hydraulic pipe line Vibrations and fault diagnosis, and pipeline detection technique and method provide experimental condition.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (7)
1. a hydraulic pipe line vibration-testing simulation experiment platform, is characterized in that, involving vibrations exciting unit, hydraulic power unit, sensing and detecting system, control unit and signal acquisition process unit;
Described vibrational excitation unit comprises worktable and process control machine, two vibrating tables is placed by worktable, vibrating table is fixed pipeline to be tested, be provided with accelerometer, resistance strain gauge and fiber-optic grating sensor in described pipeline to be tested; Described process control machine is connected with described signal acquisition process unit;
Described hydraulic power unit is provided with proportional flow control valve and proportional pressure control valve, for regulating flow and the pressure parameter of liquid in pipeline to be measured; This hydraulic power unit is also provided with number switch valve, for simulating the hydraulic pulsation in pipeline under different pressures; Described proportional flow control valve, described proportional pressure control valve are all connected with control unit with described number switch valve;
Described sensor detecting system comprises temperature transducer and pressure transducer, all arranges on a vibration table;
Described signal acquisition process unit, is connected with the sensor in described sensor detecting system, described hydraulic power unit.
2. hydraulic pipe line vibration-testing simulation experiment platform according to claim 1, it is characterized in that, described vibrating table is provided with accelerometer and resistance strain gauge, all be connected by data signal line with described signal acquisition process unit, described accelerometer is for measuring the acceleration signal of pipeline to be measured, and described resistance strain gauge and fiber-optic grating sensor are for measuring the dynamic strain signal of pipeline to be measured.
3. hydraulic pipe line vibration-testing simulation experiment platform according to claim 1, it is characterized in that, described hydraulic power unit also comprises motor, plunger pump, cooler and fuel tank, motor is connected with plunger pump, oil absorption filter is provided with between the filler opening and inlet port of plunger pump, the oil outlet of plunger pump is connected with accumulator switch, accumulator and pressure transducer, and is connected with the filler opening of an one-way valve; The oil outlet of cooler is connected with fuel tank.
4. hydraulic pipe line vibration-testing simulation experiment platform according to claim 3, is characterized in that, is provided with heater and temperature transducer in described fuel tank 23.
5. hydraulic pipe line vibration-testing simulation experiment platform according to claim 1, it is characterized in that, described control unit comprises touch screen and PLC, and the input end of PLC is connected with the output terminal of touch screen.
6. hydraulic pipe line vibration-testing simulation experiment platform according to claim 1, it is characterized in that, described signal acquisition process unit comprises data collecting card, fiber Bragg grating (FBG) demodulator and current transducer, sensor in hydraulic power unit is connected with the input end of current transducer respectively by data signal line, and the input end of data collecting card is connected with the output terminal of current transducer; Fiber-optic grating sensor is connected with the input end of fiber Bragg grating (FBG) demodulator by optical fiber.
7. hydraulic pipe line vibration-testing simulation experiment platform according to claim 1, it is characterized in that, described vibrational excitation unit also comprises signal source and power amplifier, the input end of signal source is connected with the output terminal of process control machine, the output terminal of signal source is connected with the input end of power amplifier, and the output terminal of power amplifier is connected with the input end of vibrating table.
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| CN105784396A (en) * | 2016-03-03 | 2016-07-20 | 吉林大学 | Hydraulic system component reliability test device and method including environment field |
| CN106124031A (en) * | 2016-07-08 | 2016-11-16 | 大连理工大学 | Pipe-line system vibration distribution formula home position testing method based on fiber grating |
| CN106225908A (en) * | 2016-07-08 | 2016-12-14 | 大连理工大学 | Pipe-line system vibration fault monitoring method based on fiber grating |
| CN106482953A (en) * | 2016-11-25 | 2017-03-08 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of aeroengine pipeline vibration-testing apparatus and method |
| CN106931898A (en) * | 2017-05-18 | 2017-07-07 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of strain measurement method under the hot environment based on Fibre Optical Sensor |
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