CN107575432B - Hydraulic loading device with a variety of loading force output modes - Google Patents
Hydraulic loading device with a variety of loading force output modes Download PDFInfo
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- CN107575432B CN107575432B CN201710908809.8A CN201710908809A CN107575432B CN 107575432 B CN107575432 B CN 107575432B CN 201710908809 A CN201710908809 A CN 201710908809A CN 107575432 B CN107575432 B CN 107575432B
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Abstract
The present invention provides a kind of hydraulic loading device with a variety of loading force output modes, including the load cylinder that two strokes are different and piston effective area is different；Two load cylinders are sequentially coaxially connected, and share a counter-force bracket；Wherein the load cylinder positioned at one end as static loading oil cylinder is asymmetric servo cylinder, and the cylinder body of the asymmetric servo cylinder is connected with counter-force bracket；The load cylinder of the other end is double outlet-rod hydraulic cylinders as dynamically load oil cylinder, and piston rod goes out oil cylinder and is connected with test specimen to be loaded；Each load cylinder, which is provided with, prevents for locking its piston rod its piston rod from the locking device that moves axially relative to cylinder body；When needing using one of load cylinder, which is unlocked, the locking of remaining load cylinder.The device can meet big load static strength test request, and can meet Dynamic High-accuracy vibration fatigue test requirement by simple switching.
Description
Technical field
The present invention relates to material science researchs to apply true part experimental technique field, and in particular to one kind has a variety of loading forces
The hydraulic loading device of output mode.
Background technique
Material science research application field under prior art conditions, General Proper part (product) MATERIALS ' DYNAMIC vibrating fatigue
Test and static test of pressure generally use two kinds of special purpose test equipments and complete.The reason is that: static test of pressure, load is big,
Amplitude is big, of less demanding to loading velocity；The test of dynamic vibration fatigue loading, load is small, and amplitude is small, and exciting loading velocity is high
(frequency is high).If two kinds of tests are placed on a special equipment and are completed using a kind of big specification load cylinder, hydraulic fuel feeding
Flow system flow will be configured by the oil cylinder of big load, big specification, and the load of static test of pressure is big, i.e. piston area
× pressure × η is the effective output of oil cylinder, and static loading speed is not high, but load stroke is very big, that is, cavity is very big.And
Dynamic test load is small, and load stroke (amplitude) is small, and speed is fast, needs the oil cylinder of small dimension.It is such as that the oil cylinder of big specification is simultaneous
Be used as dynamic vibration fatigue test, it is clear that be provided for it power oil supply system flow configuration it is very big, energy loss is huge
, it will result in very big power consumption in this way, i.e., it is not energy-efficient, it will also result in the increase of test run cost.And vibrating fatigue
Test period is very long, is all m × 10nIt calculates, up to ten million times or several thousands of times, are transported in the case where huge energy consumption easily
Row, test operation cost are high.And vibrating fatigue exciting is also served as with the big stroke of big specification (amplitude) oil cylinder load cylinder
Oil cylinder does side crops industry, small magnitude, high-frequency vibration fatigue test, since its cavity is excessive, by the elastic modulus change of its medium
It influences, intrinsic frequency characteristic is very low, directly affects and dynamic property is greatly reduced.Thus dedicated with side crops industry, small magnitude
Dynamic oil cylinder will also be greatly reduced compared to Measure Precision.Along with big load oil cylinder is as dynamic/quiet two kinds of functions, tension and compression sensing
Device can only be selected by maximum, and since its range is excessive, in side crops industry vibration fatigue test, feedback accuracy is also corresponding to reduce.
Summary of the invention
In view of this, the present invention provides a kind of hydraulic loading device with a variety of loading force output modes, device warp
Simple switching is crossed, big load static strength test request can be met, and Dynamic High-accuracy vibration fatigue test can be met and wanted
It asks.
The hydraulic loading device with a variety of loading force output modes, including more than two strokes are different and living
Fill in the different load cylinder of effective area；More than two load cylinders are sequentially coaxially connected, and share a counter-force bracket；Its
In to be located at the load cylinder of one end be asymmetric servo cylinder, the cylinder body of the asymmetric servo cylinder is connected with counter-force bracket；The other end
Load cylinder be double outlet-rod hydraulic cylinders, piston rod goes out oil cylinder and is connected with test specimen to be loaded；Load cylinder positioned at middle part
It is double outlet-rod hydraulic cylinders；
Each load cylinder is provided with for locking its piston rod, prevents its piston rod from carrying out relative to cylinder body
The locking device of axial movement；When needing using one of load cylinder, which is unlocked, remaining load cylinder
Locking.
As a kind of preferred embodiment of the invention: the locking device is to be arranged in load cylinder excircle along piston rod
Symmetrical opposite sides, the rigid connection plate that both ends are detachably connected with the cylinder body of the load cylinder and piston rod respectively；
When the both ends of the rigid connection plate, which are fixedly connected with block with the cylinder body of the load cylinder and piston rod rod end respectively, to be connected, institute
Load cylinder is stated to be in the lock state；When it is described rigid connection plate both ends respectively with the cylinder body and piston rod of the load cylinder
When disconnecting, the load cylinder is in the unlocked state.
As a kind of preferred embodiment of the invention:: each load cylinder is provided with the drawing for measuring loading force
Pressure sensor.
As a kind of preferred embodiment of the invention: each load cylinder is provided with for measuring piston rod displacement
Displacement sensor.
When for testing equipment with dynamic vibration fatigue and static strength binomial trial function, the hydraulic loaded
Device includes two load cylinders, respectively dynamically load oil cylinder and static loading oil cylinder；The dynamically load oil cylinder is small rule
Double outlet-rod hydraulic cylinders of the small stroke of lattice, dynamically load cylinder piston rod one end pass through rod end earrings after stretching out dynamically load cylinder body
It is fixedly connected with block and connects test specimen to be loaded, cylinder body end connects being total to for static loading cylinder piston rod by dynamic cylinder tail portion earrings
With being fixedly connected with block；
Static loading oil cylinder be the big stroke of big specification asymmetric servo cylinder, the piston rod extension end of static loading oil cylinder with
The dynamically load cylinder body is opposite, and the other end connects counter-force bracket by tail portion earrings；Static loading cylinder piston rod stretches out
Block is fixedly connected with and dynamic cylinder tail portion earrings is affixed by sharing after static loading cylinder body；In the static loading oil cylinder
The end of piston rod extension end be provided with cylinder head and be fixedly connected with block；
The dynamically load cylinder body excircle be provided with more than one rigid connection plate A, it is described rigid connection plate A one
End is fixedly connected with block A with rod end earrings and is detachably connected, and the other end is fixedly connected with block and is detachably connected with shared；In the static state
Load cylinder piston rod excircle is provided with more than one rigid connection plate B, and one end of the connecting plate B is fixedly connected with shared
Block is detachably connected, and the other end is fixedly connected with block with cylinder head and is detachably connected.
The utility model has the advantages that
(1) static servo loading oil cylinder and dynamic servo load cylinder head and the tail are connected the device on the same axis, share
One fixed counter-force bracket, by simply switching, the big stroke load cylinder of static loading test high standard, dynamically load examination
It tests and uses the small stroke of small dimension (amplitude) oil cylinder, stroke does not interfere, unrestricted；The test of big load static strength can be met to want
It asks, and high frequency, Dynamic High-accuracy vibration fatigue test requirement can be met, and flow only need to, load that cavity small small according to load
The dynamic indicator of oil cylinder configures, and had not only met dynamic test measuring accuracy in this way but also had reduced the flow configuration of system fuel feeding, especially
It is to reduce power consumption, while also reducing experimentation cost when dynamic fatigue is tested for a long time.Realize to be guarantee test
Measure Precision, and can significantly save the energy.
(2) dynamic/static test measuring accuracy is high: the big specification static loading servo-cylinder of static test, while to dynamic
State load servo-cylinder, which applies symmetry rigid fixed link plate, to be fixed；Dynamic test small dimension dynamically load servo-cylinder is right simultaneously
Static loading servo-cylinder, which applies symmetry rigid fixed link plate, to be fixed.Applying the fixed purpose of fixed link plate is effectively to avoid medium
The influence of elastic modulus change improves control measuring accuracy.
(3) it realizes and completes dynamic/static test on a testing equipment, reduce test specimen repeated clamping, improve test
Efficiency.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the hydraulic loading device；
Use state diagram when Fig. 2 is for dynamic vibration test；
Use state diagram when Fig. 3 is for static test of pressure.
Wherein: 1- rod end earrings is fixedly connected, 2- rigid connection plate A, 3- pull pressure sensor A, 4- dynamically load oil cylinder
Piston rod, 5- dynamically load cylinder body, 6- dynamically load oil cylinder transition sleeve, 7- dynamically load cylinder displacement sensor, 8- are dynamic
State cylinder tail portion earrings, 9-, which are shared, is fixedly connected with block, 10- rigid connection plate B, 11- pull pressure sensor B, 12- static loading oil cylinder
Piston rod, 13- cylinder head are fixedly connected with block, 14- static loading cylinder body, 15- static loading cylinder displacement sensor, the tail portion 16-
Earrings, 17- counter-force bracket.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention is described in further detail.
The present embodiment provides a kind of for the hydraulic of two kinds of functions of dynamic vibration fatigue test and static test of pressure
Servo-cylinder loading device can meet big load static strength test request, but can meet high frequency, Dynamic High-accuracy vibration it is tired
Labor test requirements document.
As shown in Figure 1, the hydraulic loading device includes: dynamically load component and static loading component, wherein dynamically load
Component includes；Dynamically load oil cylinder, the pressure being made of dynamically load cylinder body 5 and dynamically load cylinder piston rod 4 sense
Device A3, dynamically load oil cylinder transition sleeve 6 and dynamically load cylinder displacement sensor 7；Static loading component includes being added by static state
Static loading oil cylinder, pull pressure sensor B11 and static state that cylinder piston rod 12 and static loading cylinder body body 14 form is carried to add
Carry cylinder displacement sensor 15.
Wherein dynamically load oil cylinder is small dimension (cylinder diameter is small, stroke is short) small stroke (amplitude) oil cylinder, dynamically load oil cylinder
Piston rod 4 is double rods, and one end stretches out 5 rear connecting rod end earrings of dynamically load cylinder body and is fixedly connected with block 1, while at the end
Dynamically load cylinder piston rod 4 on be provided with pull pressure sensor A3 for measuring dynamically load power；Dynamically load oil cylinder
The other end of piston rod 4 is affixed by dynamically load oil cylinder transition sleeve 6 and dynamic cylinder tail portion earrings 8, adds for measuring dynamic
It is after the dynamically load oil cylinder transition sleeve 6 and dynamic to carry the dynamically load cylinder displacement sensor 7 that cylinder piston rod 4 is displaced
State load cylinder piston rod 4 is connected.
Static loading oil cylinder is high standard (cylinder diameter is big, stroke is long) big stroke oil cylinder, and static loading cylinder piston rod 12 is
The piston rod extension end of single rod, static loading oil cylinder is opposite with dynamically load component, and the other end is connected by tail portion earrings 16
Counter-force bracket 17.Static loading cylinder piston rod 12 stretches out after static loading cylinder body 14 to be fixedly connected with block 9 and is connected with shared, together
When pull pressure sensor B11 for measuring loading force is provided on the static loading cylinder piston rod 12 at the end；It shares solid
Determine link block 9 and dynamic cylinder tail portion earrings 8 is affixed.Cylinder head is fixed in the end of static loading cylinder piston rod extension end to fix
Link block 13.The static loading oil for measuring the displacement of static loading cylinder piston rod 12 is provided on static loading oil cylinder 14
Cylinder displacement sensor 15.
It is respectively arranged with rigid connection plate A2 in the two opposite sides of 5 excircle of dynamically load oil cylinder, rigid connection plate A2's
One end is fixedly connected with block A1 with rod end earrings and is detachably connected, and the other end is fixedly connected with block 9 and is detachably connected with sharing.In static state
The two opposite sides of 12 excircle of load cylinder piston rod be respectively arranged with rigid connection plate B10, be rigidly connected plate B10 one end with
It shares and is fixedly connected with block 9 and is detachably connected, the other end is fixedly connected with block 13 with cylinder head and is detachably connected.
Dynamically load oil cylinder is connect preceding with test specimen, and static loading oil cylinder is connect rear with counter-force bracket 17.As high frequency
When dynamic vibration is tested, static loading oil cylinder is placed in middle position by dynamically load component operation, the plate A2 of removal rigid connection at this time
(servoBcylinder, which loads, is mostly ± it loads, zero-bit, the zero-bit of the zero-location control of cylinder of valve, the zero-bit unification of sensor, therefore
It is easier that middle position applies rigid connection plate), and locked with rigid connection plate B10, the piston rod of static loading oil cylinder is not at this time
Can be mobile, static loading oil cylinder is as stiff member, and effect only plays rigid counter force wall, as shown in Figure 2.As static state
When intensity load test, static loading component removes rigid connection plate B10 at this time, and dynamically load oil cylinder is placed in middle position and by rigid
Property connecting plate A2 is fixed, and the piston rod of dynamically load oil cylinder is immovable at this time, dynamically load oil cylinder as a stiff member,
It, which is acted on, only plays the role of power transmitting, as shown in Figure 3.
Its principle are as follows: effective work area of static loading oil cylinder piston is by loading static force size to test specimen and for oil pressure
Power codetermines.Since when static loading is tested, dynamically load oil cylinder becomes rigid body via rigid connection plate A2 locking.
Therefore, the precision of static loading amplitude and loading force control or position control is unaffected, and be can satisfy test specimen and is really become
Shape requirement；Effective work area of dynamically load oil cylinder is codetermined by loading alternating force size and charge oil pressure to test specimen, by
In locking in dynamic test to static loading oil cylinder, rigid counter-force body, intracavitary oil liquid medium, in height are formed it into
When frequency dynamic test, flexible deformation will not be generated, dynamic loading test precision is unaffected.
Preferably, dynamically load oil cylinder is double rod constant speed structure types, and static loading oil cylinder is single rod difference structure
Form, dynamically load cylinder piston rod are connect with test specimen, and static loading cylinder piston rod and dynamically load oil cylinder tail earrings connect
It connects, static loading oil cylinder tail is connect with the fixed bracket of counter-force.When doing the static and dynamic experiment, it is equipped with symmetry rigid fixed link plate,
Black box constitutes dynamic/static loading device.
Preferably, dynamically load oil cylinder rod end cylinder head and cylinder tail cylinder cap earrings, which are equipped with, is connected and fixed keyway and fixing bolt
Hole can apply rigid connection plate in static loading cylinder efficient, so that dynamic cylinder be made to form rigid connection body, effect becomes
The carrier of rigid power；Cylinder head is equipped with fixed keyway and fixing bolt before static loading oil cylinder rod end earrings link block and oil cylinder
Hole can apply rigid connection plate in dynamically load cylinder efficient, so that static loading oil cylinder be made to form rigid connection counter-force part.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (6)
1. the hydraulic loading device with a variety of loading force output modes, it is characterised in that: different and living including two strokes
Fill in the different load cylinder of effective area；Two load cylinders are coaxially connected, and share a counter-force bracket；
Two load cylinders are respectively dynamically load oil cylinder and static loading oil cylinder；Wherein the dynamically load oil cylinder is small
Double outlet-rod hydraulic cylinders of the small stroke of specification, dynamically load cylinder piston rod (4) one end pass through after stretching out dynamically load cylinder body (5)
Rod end earrings is fixedly connected with block (1) and connects test specimen to be loaded, and cylinder body end connects static loading by dynamic cylinder tail portion earrings (8)
The shared of cylinder piston rod (12) is fixedly connected with block (9)；
Static loading oil cylinder be the big stroke of big specification asymmetric servo cylinder, the piston rod extension end of static loading oil cylinder with it is described
Relatively, the other end passes through tail portion earrings (16) connection counter-force bracket (17) to dynamically load cylinder body (5)；Static loading oil cylinder piston
Bar (12) stretches out static loading cylinder body (14) and is fixedly connected with block (9) and dynamic cylinder tail portion earrings (8) admittedly by sharing afterwards
It connects；The end of the piston rod extension end of the static loading oil cylinder is provided with cylinder head and is fixedly connected with block (13)；
Each load cylinder is provided with for locking its piston rod, keeps its piston rod axial from carrying out relative to cylinder body
Mobile locking device；When needing using one of load cylinder, which is unlocked, remaining load cylinder lock
It is fixed.
2. as described in claim 1 with the hydraulic loading device of a variety of loading force output modes, it is characterised in that: the lock
Determine device for setting in load cylinder excircle along the symmetrical opposite sides of piston rod, both ends respectively with the load cylinder
Cylinder body and the rigid connection plate that is detachably connected of piston rod；When it is described rigid connection plate both ends respectively with the load cylinder
Cylinder body when being fixedly connected with block with piston rod rod end and being connected, the load cylinder is in the lock state；When the rigid connection plate
Both ends when being disconnected respectively with the cylinder body of the load cylinder and piston rod, the load cylinder is in the unlocked state.
3. as described in claim 1 with the hydraulic loading device of a variety of loading force output modes, it is characterised in that: Mei Gesuo
It states load cylinder and is provided with pull pressure sensor for measuring loading force.
4. as described in claim 1 with the hydraulic loading device of a variety of loading force output modes, it is characterised in that: Mei Gesuo
It states load cylinder and is provided with the displacement sensor being displaced for measuring piston rod.
5. the hydraulic loading device with a variety of loading force output modes as described in claim 1,2,3 or 4, feature exist
In:
Dynamically load cylinder body (5) excircle is provided with more than one rigid connection plate A (2), the rigid connection plate A
(2) one end is fixedly connected with block A (1) with rod end earrings and is detachably connected, and the other end is fixedly connected with block (9) and detachably connects with sharing
It connects；Static loading cylinder piston rod (12) excircle is provided with more than one rigid connection plate B (10), the connecting plate
One end of B (10) is fixedly connected with block (9) and is detachably connected with sharing, and the other end is fixedly connected with block (13) with cylinder head and detachably connects
It connects.
6. as claimed in claim 5 with the hydraulic loading device of a variety of loading force output modes, it is characterised in that: described
Dynamically load oil cylinder (5) excircle two opposite sides are each provided with a rigid connection plate A (2)；It is living in the static loading oil cylinder
Stopper rod (12) excircle two opposite sides are each provided with a rigid connection plate B (10).
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| WO2021046985A1 (en) * | 2019-09-12 | 2021-03-18 | 清华大学 | Electro-hydraulic servo actuator for implementing long-path and high-frequency loading, and control method |
| CN110940578A (en) * | 2019-12-24 | 2020-03-31 | 南京理工大学 | True triaxial loading test device for large-size frozen soil |
| CN117147278B (en) * | 2023-08-31 | 2024-03-22 | 广西大学 | Long-term load impact coupling loading method, system, equipment and medium |
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| CN107575432A (en) | 2018-01-12 |
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