CN105738100B - A kind of hydro-pneumatic spring performance test system and test method - Google Patents
A kind of hydro-pneumatic spring performance test system and test method Download PDFInfo
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- CN105738100B CN105738100B CN201610256693.XA CN201610256693A CN105738100B CN 105738100 B CN105738100 B CN 105738100B CN 201610256693 A CN201610256693 A CN 201610256693A CN 105738100 B CN105738100 B CN 105738100B
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Abstract
The application discloses a kind of hydro-pneumatic spring performance test system and test method, including：Test-bed, servo motor, servo-driver, fuel tank, kinetic energy hydraulic energy conversion element, 22 logical reversal valves, loading hydraulic cylinder, force snesor, displacement sensor and switch boards.The application drives kinetic energy hydraulic energy conversion element by using servo motor, kinetic energy hydraulic energy conversion element drive load hydraulic cylinder implements the load to hydro-pneumatic spring, solves the energy loss caused by ratio/servo valve throttling, realize loading hydraulic cylinder without throttling motion control, improve the working efficiency of system.And the energy of hydro-pneumatic spring is converted to electric energy by the present invention by loading hydraulic cylinder, kinetic energy hydraulic energy conversion element, servo motor and servo-driver, then electric energy is returned into system power supply power grid, realize the recycling to the energy of hydro-pneumatic spring.Work efficiency is high for system, has significant energy-saving effect, can be effectively prevented from fluid Wen Sheng.
Description
Technical field
This application involves hydraulic testing platform technical fields, more particularly to a kind of hydro-pneumatic spring performance test system and examination
Proved recipe method.
Background technology
Hydro-pneumatic spring is that the non-linear elastic element of power transmission is carried out with fluid using gas as elastic fluid, is had excellent
Good damping behavior is more and more applied to various vehicles, and especially more bridges, heavy carrier vehicle can as vehicle suspension component
Ensure that vehicle can have good ride performance under various loads.The performance quality of hydro-pneumatic spring performance will directly affect
The normally travel of vehicle, superior and inferior evaluating are usually evaluated by two characteristic index：First, resistance is advised with the variation of operating rate
Rule, referred to as speed characteristics；Second is that changing rule of the resistance with stroke, referred to as indicator card.The performance for testing hydro-pneumatic spring must
Subject hydro-pneumatic spring must be given to be loaded as required.Ratio/servo hydraulic cylinder is the load side mainly used at present to top load
Method.
For ratio/servo hydraulic cylinder to pushing up loading method, control method is ripe, but the problem of being primarily present has：Ratio/servo
The oil sources of hydraulic cylinder needs to be determined according to the hydro-pneumatic spring maximum output and maximum stream flow of subject, and the flow of ratio/servo valve
It is related with valve pressure difference, since the restriction loss of ratio/servo valve results in the efficiency of load ratio/servo hydraulic cylinder system itself
It is relatively low；For hydro-pneumatic spring, although there are elastic-nonlinear characteristic, its key property or a spring performance, i.e.,
Energy is absorbed and stored by deforming, and subject oil gas bullet is given by loading ratio/servo hydraulic cylinder in hydro-pneumatic spring experiment
Spring applies pumping signal, absorbs and store energy from load ratio/servo hydraulic cylinder when hydro-pneumatic spring compresses, oil gas bullet when stretching, extension
Spring releases energy to load ratio/servo hydraulic cylinder and is changed to the thermal energy of hydraulic oil by ratio/servo valve warp knuckle circulation and is consumed,
This rapid increase for not only resulting in energy loss and also resulting in oil temperature.
Invention content
The purpose of the application is to provide a kind of hydro-pneumatic spring performance test system and test method, to solve above-mentioned existing skill
Art there are the problem of, so that system is carried out static, dynamic and continuous load to hydro-pneumatic spring, moreover, in loading procedure, nothing
Restriction loss, energy when hydro-pneumatic spring stretches can realize recycling, substantially reduce the restriction loss of system, reduce fluid temperature
It rises, improves system energy utilization rate, accomplish energy-efficient.
To achieve the above object, this application provides following schemes：The application provides a kind of hydro-pneumatic spring performance test system
System comprising：Test-bed, servo motor, servo-driver, fuel tank, kinetic energy-hydraulic energy conversion element, 22 logical reversal valves,
Loading hydraulic cylinder, force snesor, displacement sensor and switch board；
There is the servo-driver feeding function, the servo-driver to be electrically connected with the servo motor；It is described to watch
Taking motor has the function of to rotate forward dragging and reversion load, the output shaft of the servo motor and the kinetic energy-hydraulic energy conversion member
The driving axis connection of part；The inlet port of the kinetic energy-hydraulic energy conversion element is connected to fuel tank, the kinetic energy-hydraulic energy conversion
The delivery outlet of element is connect by described 22 logical reversal valves with the rodless cavity hydraulic fluid port of the loading hydraulic cylinder；The load hydraulic pressure
Cylinder is arranged on the test-bed；Described 22 logical reversal valves are controlled by the switch board and are commutated；
The force snesor is arranged on the piston rod of the loading hydraulic cylinder；Institute's displacement sensors are embedded in load liquid
Inside cylinder pressure, or, institute's displacement sensors are arranged on the test-bed；The force snesor and displacement sensor are by signal
The switch board is fed back to, the switch board passes through the servo according to the feedback signal of the force snesor and displacement sensor
Steering, rotating speed and the torque of servo motor described in driver control.
As a preferred embodiment, the hydro-pneumatic spring performance test system further includes：Small flow auxiliary feed-oil circuit, institute
Stating small flow auxiliary feed-oil circuit includes：Auxiliary feed-oil hydraulic pump, 23 logical reversal valves, the first safety valve and pressure sensors；
The inlet port of the auxiliary feed-oil hydraulic pump is connected to the fuel tank, and the delivery outlet of the auxiliary feed-oil hydraulic pump passes through described 2
3 logical reversal valves of position are connect with the rod chamber hydraulic fluid port of the loading hydraulic cylinder；The pressure sensor is arranged in the load hydraulic pressure
Signal is fed back to the switch board by the rod chamber oil port of cylinder, the pressure sensor；First safety valve is arranged in institute
State on the pipeline between 23 logical reversal valves and the loading hydraulic cylinder rod chamber hydraulic fluid port, the drain tap of first safety valve with
Fuel tank connection, the signal that the safety value of first safety valve is fed back by the switch board according to the pressure sensor into
Row setting；Described 23 logical reversal valves are controlled by the switch board and are commutated.
As a preferred embodiment, the hydro-pneumatic spring performance test system further includes boosting circuit, the kinetic energy-hydraulic pressure
The inlet port of energy conversion element is connected to the fuel tank by the boosting circuit；The boosting circuit includes：Second safety valve,
Check valve and boosting hydraulic pump；The inlet port of the boosting hydraulic pump is connected to the fuel tank, the output of the boosting hydraulic pump
Mouth is connect by the check valve with the inlet port of the kinetic energy-hydraulic energy conversion element；Second safety valve is arranged in institute
It states on the pipeline between check valve and the kinetic energy-hydraulic energy conversion element, the drain tap of the safety valve connects with the fuel tank
It connects.
As a preferred embodiment, the hydro-pneumatic spring performance test system further includes third safety valve, the third peace
Full valve is arranged on the pipeline between the delivery outlet and 22 logical reversal valves of the kinetic energy-hydraulic energy conversion element, the third
The drain tap of safety valve is connect with the fuel tank, and the safety value of the third safety valve is set by the switch board.
Further, the kinetic energy-hydraulic energy conversion element is the arbitrary of hydraulic pump, hydraulic motor or hydraulic secondary component
One.
Further, the loading hydraulic cylinder is single rod asymmetrical cylinder.
Further, the servo motor be AC servo motor, alternating-current variable frequency motor or DC servo motor, it is described to watch
Take driver and the servo motor type matching.
Using a kind of hydro-pneumatic spring method for testing performance of above-mentioned hydro-pneumatic spring performance test system, include the following steps：
Pilot system starts：Switch board powers on, and 22 logical reversal valves are in power failure state, starts servo-driver, setting
The rotating speed of servo motor is 0 rev/min；
Compress hydro-pneumatic spring：Switch board controls 22 logical reversal valves and obtains electric, and switch board controls servo by servo-driver
Motor rotates forward, and servo motor drives kinetic energy-hydraulic energy conversion element to rotate forward, and kinetic energy-hydraulic energy conversion element driving fluid passes through 2
2 logical reversal valves of position to loading hydraulic cylinder rodless cavity, loading hydraulic cylinder drives piston rod to rise, and piston rod makes hydro-pneumatic spring be compressed to
Setting position, in this course system convert electrical energy into the potential energy of hydro-pneumatic spring, force snesor and displacement sensor will be surveyed
Amount signal feeds back to switch board；
Stretch hydro-pneumatic spring：Switch board controls 22 logical reversal valves and obtains electric, and loading hydraulic cylinder piston rod is in hydro-pneumatic spring
Pressure effect is lower to be declined, and fluid turns by 22 logical reversal valve driving kinetic energy-hydraulic energy conversion element reversions, kinetic energy-hydraulic energy
It changes element driving servo motor reversion power generation at the same time to be required according to the rate of stretch of hydro-pneumatic spring, switch board passes through servo
The rotating speed of driver control servo motor, in this course system by the potential energy of hydro-pneumatic spring be electric energy by servo-drive
Device feeds back to power grid, and measuring signal is fed back to switch board by force snesor and displacement sensor；
Circulating pressure is tested：Switch board is according to the mode of operation of compression hydro-pneumatic spring and stretching, extension hydro-pneumatic spring, Repeated Compression
With stretching, extension hydro-pneumatic spring；Switch board does back and forth movement with 3-4 beats/min of FREQUENCY CONTROL hydro-pneumatic spring, and switch board is passed according to power
The measuring signal of sensor feedback carries out power closed-loop control, ensures the output valve of force snesor in the first specified value and the second specified value
Between rule change；Test period is 30 minutes；
Pressurize is tested：Switch board controls loading hydraulic cylinder and compresses hydro-pneumatic spring according to the mode of operation of compression hydro-pneumatic spring,
Force snesor output valve is set to reach setting value；Then switch board controls 22 logical reversal valve dead electricity, is kept for 10 minutes；Then it controls
For cabinet according to the mode of operation control servomotor of stretching, extension hydro-pneumatic spring with permanent torque reversal, permanent torque value is maintained at 0Nm, and protects
The piston rod of card hydro-pneumatic spring freely declines, and measures and records hydro-pneumatic spring and restores to the time of the fully extended state；It repeats to protect
Pressure experiment 5 times；
Dynamic characteristic test：Switch board passes displacement according to the mode of operation of compression hydro-pneumatic spring and stretching, extension hydro-pneumatic spring
The measuring signal of sensor constitutes outer shroud control loop as feedback signal, using servo motor rotating speed as inner ring control loop, with
Centered on setting position, control hydro-pneumatic spring does back and forth movement with the displacement of the frequency and setting that set, and switch board measures and remembers
The positional value curve for recording the output valve and displacement sensor of force snesor, obtains the speed characteristics and indicator card of hydro-pneumatic spring.
According to specific embodiment provided by the present application, this application discloses following technique effects：The application is by using watching
Motor driving kinetic energy-hydraulic energy conversion element is taken, kinetic energy-hydraulic energy conversion element drive load hydraulic cylinder is implemented to hydro-pneumatic spring
Load, solve in the hydraulic cylinder loading method using ratio/servo valve control, caused by the throttling of ratio/servo valve
Energy loss, realize loading hydraulic cylinder without throttling motion control, improve the working efficiency of system.And the present invention is by adding
The energy of hydro-pneumatic spring is converted to hydraulic energy by carrier fluid cylinder pressure, then is converted to hydraulic energy by kinetic energy-hydraulic energy conversion element
Kinetic energy, then electric energy is converted kinetic energy by servo motor and servo-driver, then electric energy is returned into system power supply power grid,
Realize the recycling to hydro-pneumatic spring energy.Compared with ratio/servo valve control cylinder mode loading method, the system under declared working condition
Efficiency can be improved 80% or more, have significant energy-saving effect, can effectively avoid system fluid Wen Sheng.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is embodiment system schematic provided by the present application；
Wherein, 1 is test-bed, and 2 be hydro-pneumatic spring, and 3 be force snesor, and 4 be loading hydraulic cylinder, and 5 be displacement sensor,
6 be the first safety valve, and 7 be 23 logical reversal valves, and 8 be auxiliary feed-oil hydraulic pump, and 9 turn for boosting circuit, 10 for kinetic energy-hydraulic energy
Element is changed, 11 be third safety valve, and 12 be 22 logical reversal valves, and 13 be servo motor, and 14 be servo-driver, and 15 pass for pressure
Sensor, 16 cabinets in order to control.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
The purpose of the application is to provide a kind of hydro-pneumatic spring performance test system and test method, to solve above-mentioned existing skill
Art there are the problem of, so that system is carried out static, dynamic and continuous load to hydro-pneumatic spring 2, moreover, in loading procedure,
Without restriction loss, energy when hydro-pneumatic spring 2 stretches can realize recycling, substantially reduce the restriction loss of system, reduce fluid
Wen Sheng improves system energy utilization rate, accomplishes energy-efficient.
In order to make the above objects, features, and advantages of the present application more apparent, below in conjunction with the accompanying drawings and it is specific real
Applying mode, the present application will be further described in detail.
This application provides a kind of hydro-pneumatic spring performance test systems comprising：Test-bed 1, servo motor 13, servo
Driver 14, fuel tank, kinetic energy-hydraulic energy conversion element 10,22 logical reversal valves 12, loading hydraulic cylinder 4, force snesor 3, displacement
Sensor 5 and switch board 16；
There is the servo-driver 14 feeding function, the servo-driver 14 to be electrically connected with the servo motor 13；
The servo motor 13 has the function of to rotate forward dragging and reversion load, the output shaft of the servo motor 13 and the kinetic energy-liquid
The driving axis connection of pressure energy conversion element 10；The inlet port of the kinetic energy-hydraulic energy conversion element 10 is connected to fuel tank, described dynamic
The delivery outlet of energy-hydraulic energy conversion element 10 is oily by the rodless cavity of described 22 logical reversal valves 12 and the loading hydraulic cylinder 4
Mouth connection；The loading hydraulic cylinder 4 is arranged on the test-bed 1；Described 22 logical reversal valves 12 are by the switch board 16
Control commutation；
The force snesor 3 is arranged on the piston rod of the loading hydraulic cylinder 4；Institute's displacement sensors 5, which are embedded in, to be added
Inside carrier fluid cylinder pressure 4, or, institute's displacement sensors 5 are arranged on the test-bed 1；The force snesor 3 and displacement sensing
Signal is fed back to the switch board 16 by device 5, and the switch board 16 is according to the feedback of the force snesor 3 and displacement sensor 5
Signal controls steering, rotating speed and the torque of the servo motor 13 by the servo-driver 14.
The application drives kinetic energy-hydraulic energy conversion element 10, kinetic energy-hydraulic energy conversion element by using servo motor 13
10 drive load hydraulic cylinders 4 implement the load to hydro-pneumatic spring 2, solve the hydraulic cylinder load using ratio/servo valve control
In method, the energy loss caused by the throttling of ratio/servo valve, realize loading hydraulic cylinder 4 without the motion control that throttles, carry
The high working efficiency of system.And the energy of hydro-pneumatic spring 2 is converted to hydraulic energy by the present invention by loading hydraulic cylinder 4, then lead to
It crosses kinetic energy-hydraulic energy conversion element 10 and hydraulic energy is converted into kinetic energy, then will by servo motor 13 and servo-driver 14
Kinetic energy is converted to electric energy, then electric energy is returned to system power supply power grid, realizes the recycling of the energy to hydro-pneumatic spring 2.With than
Example/servo hydraulic cylinder loading method is compared, and the efficiency of system can be improved 80% or more under declared working condition, is had significant energy saving
Effect can effectively avoid system fluid Wen Sheng.
When hydro-pneumatic spring 2 carries out pressurize experiment, switch board 16 is commutated by operating 22 logical reversal valves 12, is realized and is added
The rodless cavity of carrier fluid cylinder pressure 4 is closed, and then meets 2 long-time pressurize test requirements document of hydro-pneumatic spring.It can be cut off in this case
The power of servo motor 13, to further decrease the energy consumption of system.
Such as：Assuming that the power of the application and the system of traditional ratio/servo hydraulic cylinder loading method is 500KW,
When carrying out cyclic test under declared working condition, traditional ratio/servo hydraulic cylinder loading method is in compression hydro-pneumatic spring 2 and stretching, extension
When hydro-pneumatic spring 2, the energy of 500KWh is consumed in the unit interval respectively, consumes the energy of 1000KWh altogether.And the application
The efficiency of servo-driver 14 be generally not less than 96%, the efficiency of servo motor 13 is generally not less than 95%, kinetic energy-hydraulic energy
The efficiency of conversion element 10 is generally not less than 90%, and pipeline loss is generally not more than 1%, and the efficiency of loading hydraulic cylinder 4 is generally not
Less than 96%, calculate it is found that the total working efficiency of the application is not less than 96% × 95% × 90% × (1-1%) × 96%=
78%.It calculates it is found that the application passes the no less than energy of 500KWh × 78%=390KWh when compressing hydro-pneumatic spring 2
It has passed hydro-pneumatic spring 2 and has been used as potential energy storage, and will no less than 390KWh × 78%=when upholding hydro-pneumatic spring 2
The energy of 304KWh is converted to electric energy and returns to system power supply power grid, and working unit time total energy consumption is 500KWh-
304KWh=196KWh.The application reduces at least relative to traditional ratio/servo hydraulic cylinder loading method
The energy expenditure of (1000KWh-196KWh)/1000KWh=80.4%.So with ratio/servo hydraulic cylinder load side
Method is compared, and the application efficiency of system under declared working condition can be improved 80% or more.
As a preferred embodiment, the hydro-pneumatic spring performance test system further includes：Small flow auxiliary feed-oil circuit, institute
Stating small flow auxiliary feed-oil circuit includes：8,23 logical reversal valves 7 of auxiliary feed-oil hydraulic pump, the first safety valve 6 and pressure sensing
Device 15；The inlet port of the auxiliary feed-oil hydraulic pump 8 is connected to the fuel tank, the delivery outlet warp of the auxiliary feed-oil hydraulic pump 8
Described 23 logical reversal valves 7 are crossed to connect with the rod chamber hydraulic fluid port of the loading hydraulic cylinder 4；The pressure sensor 15 is arranged in institute
The rod chamber oil port of loading hydraulic cylinder 4 is stated, signal is fed back to the switch board 16 by the pressure sensor 15；Described first
Safety valve 6 is arranged on the pipeline between 4 rod chamber hydraulic fluid port of described 23 logical reversal valves 7 and the loading hydraulic cylinder, and described
The drain tap of one safety valve 6 is connect with the fuel tank, and the safety value of first safety valve 6 is by the switch board 16 according to described
The signal that pressure sensor 15 is fed back is set；Described 23 logical reversal valves 7 are controlled by the switch board 16 and are commutated.It is described small
Flow auxiliary feed-oil circuit is mainly used for：When loading hydraulic cylinder 4 can not voluntarily retract, the retraction of secondary load hydraulic cylinder 4 is grasped
Make；When carrying out 2 Dynamic performance examination of hydro-pneumatic spring, 2 undercapacity of hydro-pneumatic spring is compensated, to improve the dynamic response speed of system
Degree.
As a preferred embodiment, the hydro-pneumatic spring performance test system further includes boosting circuit 9, the kinetic energy-liquid
The inlet port of pressure energy conversion element 10 is connected to the fuel tank by the boosting circuit 9；The boosting circuit 9 includes：Second
Safety valve, check valve and boosting hydraulic pump；The inlet port of the boosting hydraulic pump is connected to the fuel tank, the boosting hydraulic pump
Delivery outlet connect with the inlet port of the kinetic energy-hydraulic energy conversion element 10 by the check valve；Second safety valve
Be arranged on the pipeline between the check valve and the kinetic energy-hydraulic energy conversion element 10, the drain tap of the safety valve with
The fuel tank connection.For improving oil suction state of the kinetic energy-hydraulic energy conversion element 10 in pump condition, to prevent kinetic energy-hydraulic pressure
Energy conversion element 10 is emptied.
As a preferred embodiment, the hydro-pneumatic spring performance test system further includes third safety valve 11, the third
Safety valve 11 is arranged on the pipeline between the delivery outlet and 22 logical reversal valves 12 of the kinetic energy-hydraulic energy conversion element 10,
The drain tap of the third safety valve 11 is connect with the fuel tank；The safety value of the third safety valve 11 is by the switch board 16
It is set according to the feedback signal of the force snesor 3 and displacement sensor 5.The third safety valve 11 is for protecting kinetic energy-liquid
Pressure energy conversion element 10 is operated within the scope of safe pressure.
Further, the kinetic energy-hydraulic energy conversion element 10 is appointing for hydraulic pump, hydraulic motor or hydraulic secondary component
Meaning one.
Further, the loading hydraulic cylinder 4 is single rod asymmetrical cylinder.
Further, the servo motor 13 is appointing for AC servo motor, alternating-current variable frequency motor or DC servo motor
Meaning one, the servo-driver 14 and 13 type matching of the servo motor.
Using a kind of hydro-pneumatic spring method for testing performance of above-mentioned hydro-pneumatic spring performance test system, include the following steps：
Pilot system starts：Switch board 16 powers on, and 22 logical reversal valves 12 are in power failure state, starts servo-driver
14, the rotating speed of servo motor 13 is set as 0 rev/min；
Compress hydro-pneumatic spring：Switch board 16 controls 22 logical reversal valves 12 must be electric, and switch board 16 passes through servo-driver 14
Control servomotor 13 rotates forward, and servo motor 13 drives kinetic energy-hydraulic energy conversion element 10 to rotate forward, kinetic energy-hydraulic energy conversion member
Part 10 drives fluid by 22 logical reversal valves 12 to 4 rodless cavity of loading hydraulic cylinder, and loading hydraulic cylinder 4 drives piston rod to rise,
Piston rod makes hydro-pneumatic spring 2 be compressed to setting position, and system converts electrical energy into the potential energy of hydro-pneumatic spring 2 in this course,
Measuring signal is fed back to switch board 16 by force snesor 3 and displacement sensor 5；
Stretch hydro-pneumatic spring：Switch board 16 controls 22 logical reversal valves 12 must be electric, and 4 piston rod of loading hydraulic cylinder is in oil gas bullet
The pressure effect of spring 2 is lower to be declined, and fluid drives kinetic energy-hydraulic energy conversion element 10 to invert by 22 logical reversal valves 12, kinetic energy-
Hydraulic energy conversion element 10 drives the reversion power generation of servo motor 13 at the same time to be required according to the rate of stretch of hydro-pneumatic spring 2,
Switch board 16 is by the rotating speed of 14 control servomotor 13 of servo-driver, and system is by the potential energy of hydro-pneumatic spring 2 in the process
It is converted into electric energy and feeds back to power grid, servo motor 13 stops operating when hydro-pneumatic spring 2 is stretched over setting position, force snesor
3 and displacement sensor 5 measuring signal is fed back into switch board 16, for hydro-pneumatic spring 2 position and pressure control；
Circulating pressure is tested：Switch board 16 is pressed repeatedly according to the mode of operation of compression hydro-pneumatic spring and stretching, extension hydro-pneumatic spring
Contracting and stretching, extension hydro-pneumatic spring 2；Switch board 16 does back and forth movement, switch board 16 with 3-4 beats/min of FREQUENCY CONTROL hydro-pneumatic spring 2
According to force snesor 3 feed back measuring signal carry out power closed-loop control, ensure force snesor 3 output valve the first specified value with
Rule changes between second specified value；Test period is 30 minutes；
Pressurize is tested：Switch board 16 is according to the mode of operation of compression hydro-pneumatic spring, the control compression oil gas bullet of loading hydraulic cylinder 4
Spring 2 makes 3 output valve of force snesor reach setting value；Then switch board 16 controls 22 logical reversal valve, 12 dead electricity, makes force snesor
3 output valve is maintained at setting value 10 minutes；Then switch board 16 is electric according to the mode of operation control servo of stretching, extension hydro-pneumatic spring
For machine 13 with permanent torque reversal, permanent torque value is maintained at 0Nm and is subject to as possible ensures that the piston rod of hydro-pneumatic spring 2 freely declines,
It measures and records hydro-pneumatic spring 2 and restore to the time of the fully extended state；Pressurize is repeated to test at least 5 times；
Dynamic characteristic test：Switch board 16 is according to compression hydro-pneumatic spring and the mode of operation for stretching hydro-pneumatic spring, by displacement
The measuring signal of sensor 5 constitutes outer shroud control loop as feedback signal, is controlled back using 13 rotating speed of servo motor as inner ring
Road, centered on setting position, control hydro-pneumatic spring 2 with defined frequency, usually between 0.1-2Hz, and regulation displacement away from
From back and forth movement is done, switch board 16 measures and records the output valve of force snesor 3 and the shift value curve of displacement sensor 16；
To the speed characteristics and indicator card of hydro-pneumatic spring 2.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For system disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is said referring to method part
It is bright.
Specific examples are used herein to illustrate the principle and implementation manner of the present application, and above example is said
It is bright to be merely used to help understand the present processes and its core concept；Meanwhile for those of ordinary skill in the art, foundation
The thought of the application, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as the limitation to the application.
Claims (1)
1. a kind of hydro-pneumatic spring method for testing performance is carried out, the hydro-pneumatic spring performance using hydro-pneumatic spring performance test system
Pilot system includes：Test-bed, servo motor, servo-driver, fuel tank, kinetic energy-hydraulic energy conversion element, 22 logical commutations
Valve, loading hydraulic cylinder, force snesor, displacement sensor and switch board；
There is the servo-driver feeding function, the servo-driver to be electrically connected with the servo motor；The servo electricity
Machine has the function of to rotate forward dragging and reversion load, the output shaft of the servo motor and the kinetic energy-hydraulic energy conversion element
Drive axis connection；The inlet port of the kinetic energy-hydraulic energy conversion element is connected to fuel tank, the kinetic energy-hydraulic energy conversion element
Delivery outlet connect with the rodless cavity hydraulic fluid port of the loading hydraulic cylinder by described 22 logical reversal valves；The loading hydraulic cylinder is set
It sets on the test-bed；Described 22 logical reversal valves are controlled by the switch board and are commutated；
The force snesor is arranged on the piston rod of the loading hydraulic cylinder；Institute's displacement sensors are embedded in loading hydraulic cylinder
Inside, or, institute's displacement sensors are arranged on the test-bed；The force snesor and displacement sensor feed back signal
To the switch board, the switch board passes through the servo-drive according to the feedback signal of the force snesor and displacement sensor
Device controls steering, rotating speed and the torque of the servo motor；
The hydro-pneumatic spring performance test system further includes：Small flow auxiliary feed-oil circuit, the small flow auxiliary feed-oil circuit
Including：Auxiliary feed-oil hydraulic pump, 23 logical reversal valves, the first safety valve and pressure sensors；The auxiliary feed-oil hydraulic pump
Inlet port is connected to the fuel tank, and the delivery outlet of the auxiliary feed-oil hydraulic pump is by described 23 logical reversal valves and the load
The rod chamber hydraulic fluid port of hydraulic cylinder connects；The rod chamber oil port in the loading hydraulic cylinder is arranged in the pressure sensor, described
Signal is fed back to the switch board by pressure sensor；The first safety valve setting adds in described 23 logical reversal valves with described
On pipeline between carrier fluid cylinder pressure rod chamber hydraulic fluid port, the drain tap of first safety valve is connect with the fuel tank, and described first
The safety value of safety valve is set by the switch board according to the signal that the pressure sensor is fed back；Described 23 logical commutations
Valve is controlled by the switch board and is commutated；
The hydro-pneumatic spring performance test system further includes boosting circuit, and the inlet port of the kinetic energy-hydraulic energy conversion element is logical
It crosses the boosting circuit and is connected to the fuel tank；The boosting circuit includes：Second safety valve, check valve and boosting hydraulic pump；
The inlet port of the boosting hydraulic pump is connected to the fuel tank, and the delivery outlet of the boosting hydraulic pump passes through the check valve and institute
State the inlet port connection of kinetic energy-hydraulic energy conversion element；Second safety valve is arranged in the check valve and the kinetic energy-liquid
On pipeline between pressure energy conversion element, the drain tap of the safety valve is connect with the fuel tank；
The hydro-pneumatic spring performance test system further includes third safety valve, and the third safety valve is arranged in the kinetic energy-liquid
On pipeline between the delivery outlet of pressure energy conversion element and 22 logical reversal valves, drain tap and the oil of the third safety valve
Case connects, and the safety value of the third safety valve is by the switch board according to the feedback letter of the force snesor and displacement sensor
Number setting；
The kinetic energy-hydraulic energy conversion element is any one of hydraulic pump, hydraulic motor or hydraulic secondary component；
The loading hydraulic cylinder is single rod asymmetrical cylinder；
The servo motor is AC servo motor, alternating-current variable frequency motor or DC servo motor, the servo-driver and institute
State servo motor type matching；
It is characterized in that：Include the following steps：
Pilot system starts：Switch board powers on, and 22 logical reversal valves are in power failure state, starts servo-driver, sets servo
The rotating speed of motor is 0 rev/min；
Compress hydro-pneumatic spring：Switch board controls 22 logical reversal valves and obtains electric, and switch board passes through servo-driver control servomotor
It rotates forward, servo motor drives kinetic energy-hydraulic energy conversion element to rotate forward, and kinetic energy-hydraulic energy conversion element driving fluid passes through 22
Logical reversal valve to loading hydraulic cylinder rodless cavity, loading hydraulic cylinder drives piston rod to rise, and piston rod makes hydro-pneumatic spring be compressed to set
Positioning is set, and system converts electrical energy into the potential energy of hydro-pneumatic spring in this course, and force snesor and displacement sensor will measure
Signal feeds back to switch board, is used for the control of hydro-pneumatic spring position and pressure；
Stretch hydro-pneumatic spring：Switch board controls 22 logical reversal valves and obtains electric, pressure of the loading hydraulic cylinder piston rod in hydro-pneumatic spring
Effect is lower to be declined, and fluid is by 22 logical reversal valve driving kinetic energy-hydraulic energy conversion element reversions, kinetic energy-hydraulic energy conversion member
Part drives servo motor reversion power generation at the same time to be required according to the rate of stretch of hydro-pneumatic spring, and switch board passes through servo-drive
The rotating speed of device control servomotor, the potential energy of hydro-pneumatic spring is electric energy and to feed back to power grid by system in the process, when
Servo motor stops operating when hydro-pneumatic spring is stretched over setting position, and force snesor and displacement sensor feed back to measuring signal
Switch board is used for the control of hydro-pneumatic spring position and pressure；
Circulating pressure is tested：Switch board is according to compression hydro-pneumatic spring and stretches the mode of operation of hydro-pneumatic spring, Repeated Compression and stretches
Open up hydro-pneumatic spring；Switch board does back and forth movement with 3-4 beats/min of FREQUENCY CONTROL hydro-pneumatic spring, and is fed back according to force snesor
Measuring signal carry out power closed-loop control, ensure the output valve of the force snesor rule between the first specified value and the second specified value
Variation；Test period is 30 minutes；
Pressurize is tested：Switch board controls loading hydraulic cylinder and compresses hydro-pneumatic spring, make power according to the mode of operation of compression hydro-pneumatic spring
Sensor output value reaches setting value；Then switch board controls 22 logical reversal valve dead electricity, is kept for 10 minutes；Then switch board is pressed
According to stretching, extension hydro-pneumatic spring mode of operation control servomotor with permanent torque reversal, permanent torque value is maintained at 0Nm, and ensures oil
The piston rod of gas spring freely declines, and measures and records hydro-pneumatic spring and restores to the time of the fully extended state；Repeat pressurize examination
It tests 5 times；
Dynamic characteristic test：Switch board is according to compression hydro-pneumatic spring and the mode of operation for stretching hydro-pneumatic spring, by displacement sensor
Measuring signal as feedback signal constitute outer shroud control loop, using servo motor rotating speed be used as inner ring control loop, with set
Centered on position, control hydro-pneumatic spring does back and forth movement with the displacement of the frequency and setting that set, and switch board measures and records power
The output valve of sensor and the positional value curve of displacement sensor, obtain the speed characteristics and indicator card of hydro-pneumatic spring.
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| CN107356442B (en) * | 2017-07-17 | 2019-11-19 | 集美大学 | A kind of experimental rig of hydro-pneumatic suspension system |
| CN107907319A (en) * | 2017-11-29 | 2018-04-13 | 山东省产品质量检验研究院 | A kind of fire-fighting opens performance automatic test equipment with door opener |
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