CN107061415A - A kind of multifunctional solution compression testing device - Google Patents
A kind of multifunctional solution compression testing device Download PDFInfo
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- CN107061415A CN107061415A CN201710426323.0A CN201710426323A CN107061415A CN 107061415 A CN107061415 A CN 107061415A CN 201710426323 A CN201710426323 A CN 201710426323A CN 107061415 A CN107061415 A CN 107061415A
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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
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
-
- 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
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to hydraulic testing apparatus technical field, a kind of multifunctional solution compression testing device, including hydraulic test system, hydraulic test loading system and controller are disclosed；Hydraulic test system includes open type and tests oil circuit and enclosed experiment oil circuit, and open type experiment oil circuit includes the sensitive control valve group of motor, open type variable pump, filter, test load and test element is sequentially connected；Hydraulic test loading system includes the sensitive control valve group of frequency converter, motor, constant displacement pump, filter, offered load, bridge-type combination valve and loading element and is sequentially connected, test oil circuit connection corresponding with each loading oil circuit, i.e. enclosed motor, test element connect one to one with loading element respectively, torque rotary speed sensor is set between enclosed motor and loading element, sensor is set between test element and loading element；The present invention meets single loop experiment, multiloop while experiment, single hydraulic element test, the efficiency and accuracy of hydraulic test process are high, and energy conservation and consumption reduction effects are good.
Description
Technical field
The present invention relates to hydraulic testing apparatus technical field, more particularly to a kind of multifunctional solution compression testing device.Especially fit
Research and development test for hydraulic construction machine.
Background technology
With social in recent years continuous construction and development, set in the construction of architectural engineering, tunnel, subway, highway etc.
In standby, the application of hydraulic construction machine occupies larger ratio.Particularly hydraulic crawler excavator, hydraulic loader, hydraulic breaker
Almost into the indispensable hydraulic machinery of site construction.Novel hydraulic equip or Hydraulic Elements research and development, existing hydraulic equipment or
The upgrading of Hydraulic Elements all be unable to do without corresponding hydraulic testing apparatus.Hydraulic testing apparatus is in hydraulic construction machine and hydraulic pressure
Very crucial effect is played in the research and development and detection of element.By being researched and analysed to domestic hydraulic testing apparatus, current state
Hydraulic internal pressure test device is generally the performance detection towards Hydraulic Elements, and a small number of multifunction hydraulics towards hydraulic system test dress
Put single there is also test function, using and research range it is narrow, test accuracy is low and inadequate energy-conservation.
The content of the invention
The technical problems to be solved by the invention are：Tried for above-mentioned problem there is provided a kind of multifunction hydraulic
Experiment device, meets single loop experiment, multiloop while experiment, single hydraulic element test, and the efficiency and essence of hydraulic test process
Exactness is high, and energy conservation and consumption reduction effects are good.
The technical solution adopted by the present invention is as follows：A kind of multifunctional solution compression testing device, including hydraulic test system, hydraulic pressure
Plate test loading system and controller；
The hydraulic test system includes open type and tests oil circuit and enclosed experiment oil circuit, and the open type experiment oil circuit includes electricity
The sensitive control valve group of machine, open type variable pump, filter, test load and test element are connected in sequence, the test load
Sensitive control valve group includes multiple control valve blocks arranged side by side, and each control valve block entrance is connected with same filter, multiple controls
Valve block outlet processed individually connects a test element so that master trip oil circuit is divided into multiple branch arranged side by side after the filters
Oil circuit, so as to form multichannel open type experiment branch oil circuit；The enclosed experiment oil circuit includes motor, enclosed variable pump and enclosed motor
It is connected in sequence, forms enclosed experiment oil circuit；
The hydraulic test loading system includes the sensitive control valve of frequency converter, motor, constant displacement pump, filter, offered load
Group, bridge-type combination valve and loading element are connected in sequence, and the sensitive control valve group of the offered load includes multiple controls arranged side by side
Valve block processed, each control valve block entrance is connected with same filter, and multiple control valve block outlets individually connect a bridge
Formula combination valve, each bridge-type combination valve individually connects a loading element so that main loading oil circuit is divided into after the filters
Multiple branch oil circuits arranged side by side, so as to form multichannel loading branch oil circuit；
Each experiment oil circuit is corresponding with each loading oil circuit to be connected, i.e., enclosed motor, test element respectively with loading element one
One correspondence connection, is provided with torque rotary speed sensor, between test element and loading element between enclosed motor and loading element
It is provided with sensor；
The control valve block includes pressure-compensated valve, electric-hydraulic proportion commutation main valve, 2 electric proportional reversing valves and shuttle valve, pressure
Force compensating valve inlet is connected with filter, its outlet is connected with electric-hydraulic proportion commutation main valve inlet；In hydraulic test system, electricity
Liquid proportional commutation Main valve outlet is connected with corresponding test element, in hydraulic test loading system, electric-hydraulic proportion commutation main valve
Outlet is connected with corresponding loading element；Shuttle valve left end is connected with pressure-compensated valve and electric-hydraulic proportion commutation main valve respectively, right-hand member
It is connected with the upper end of the shuttle valve in next control valve block；The left end outlet of 2 electric proportional reversing valves is changed with electric-hydraulic proportion respectively
Connected to the left end and right-hand member of main valve, electric proportional reversing valve right-hand member entrance is connected with control oil circuit；
In the hydraulic test system, the shuttle valve is connected with open type variable pump；
In hydraulic test loading system, be connected with electric proportional pressure control valve on the bridge-type combination valve, the constant displacement pump with
It is provided between offered load sensitivity control valve group on overflow oil circuit, the overflow oil circuit and is provided with constant difference overflow valve, the shuttle
Valve is connected with constant difference overflow valve, and is provided between shuttle valve and constant difference overflow valve pressure sensor, and the quantitative pump discharge is set
It is equipped with pressure sensor；
The torque rotary speed sensor, sensor, pressure sensor, motor, frequency converter, enclosed variable pump, filter, electricity
Proportional reversing valve and electric proportional pressure control valve are electrically connected with the controller.
A kind of multifunctional solution compression testing device of the present invention, the test element be open type motor or oil cylinder, it is described
Loading element is loading motor, load pump or loading cylinder；Wherein, the connection corresponding with loading motor or load pump of open type motor, oil
Cylinder connection corresponding with loading cylinder.
A kind of multifunctional solution compression testing device of the present invention, the connection corresponding with loading motor or load pump of open type motor
When, the sensor is torque rotary speed sensor；Oil cylinder with loading cylinder it is corresponding connection when, the sensor be power displacement sensing
Device.
A kind of multifunctional solution compression testing device of the present invention, oil overflow road leading point is located at constant displacement pump and filtering
Between device.
A kind of multifunctional solution compression testing device of the present invention, the hydraulic test loading system also includes repairing oil
Road, repairing oil circuit, which is included in after filter, is sequentially connected repairing control valve block and pressure-reducing valve, and pressure-reducing valve is connected with bridge-type combination valve.
A kind of multifunctional solution compression testing device of the present invention, in addition to oil return cooling system, the oil return cooling system
System includes filter, cooler and fuel tank and is connected in sequence；The test element, loading element and constant difference overflow valve pass through pipe
Road is connected with filter, and the electric proportional pressure control valve is connected by pipeline with fuel tank；The oil return cooling system also include motor,
The oil return cooling oil path that open type variable pump, pressure sensor, motor for cooling fan are connected in sequence by pipeline, motor, pressure
Force snesor is electrically connected with the controller, and motor for cooling fan is connected by pipeline with fuel tank, and open type variable pump inlet connects with fuel tank
Connect, open type variable pump pumps out the oil return in fuel tank, fuel tank is sent back to again after motor for cooling fan is cooled down；The enclosed
Variable pump, open type variable pump and constant displacement pump are connected by pipeline with fuel tank.
A kind of multifunctional solution compression testing device of the present invention, in enclosed experiment oil circuit, motor becomes with enclosed
Torque rotary speed sensor is provided between amount pump, enclosed variable pump discharge is disposed with pressure sensor and flowmeter；Institute
State in open type experiment oil circuit, torque rotary speed sensor is provided between motor and open type variable pump, open type variable pump discharge is set
There is pressure sensor, filter outlet is connected with flowmeter；In each branch experiment oil circuit, between each control valve block and test element
Respectively it is disposed with flowmeter and pressure sensor；Filter outlet is connected with flowmeter in the loading system, fixed
Poor overflow valve outlet is connected with flowmeter；The electric proportional pressure control valve porch and bridge-type combination valve porch are provided with pressure
Sensor；And torque rotary speed sensor, pressure sensor and flowmeter are electrically connected with the controller.
Compared with prior art, having the beneficial effect that using above-mentioned technical proposal：
(1) experimental rig uses " variable pump (constant displacement pump)+load-sensitive " control technology, can be achieved all-hydraulic many times
Road is while operating condition of test, single loop operating condition of test, single hydraulic element test.Realize that many hydraulic branch (or multiple Hydraulic Elements) can
Test, and do not interfere with each other simultaneously mutually；Realize energy-saving.
(2) hydraulic loading system uses " frequency converter+motor+constant displacement pump+load-sensitive valve " pressure closed loop Flow-rate adjustment skill
Art, the load pressure fed back by load-sensitive valve, the rotating speed of adjustment quantitative pump realizes that the output flow of controlling pump reaches energy-conservation
Purpose.
(3) hydraulic loading system closed loop load Loading Control, hydraulic test system closed-loop drive control, improves hydraulic test
Accuracy.Hydraulic test can simulate various working opposite opened pump-motor Hydraulic Power Transmission System, enclosed pump-horse with loading system
Loaded up to Hydraulic Power Transmission System, open type pump-to-cylinder Hydraulic Power Transmission System, its load value is adjustable, complete default hydraulic drive
With Control experiment.
(4) described device can be realized：All-hydraulic loop is tested simultaneously, single loop is tested, single hydraulic element test.Realize high
The work of efficiency, low power loss, short form test device.
Brief description of the drawings
Fig. 1 is hydraulic test loading system pressure closed loop Flow-rate adjustment, closed loop load Loading Control and hydraulic pressure in the present invention
Pilot system closed loop closed-loop drive schematic diagram；
Fig. 2 is electric proportional pressure control valve operation principle schematic diagram in the present invention；
Fig. 3 is structure connection diagram of the present invention；
Fig. 4 is hydraulic test system structural representation in the present invention；
Fig. 5 is hydraulic test loading system structural representation in the present invention；
Fig. 6 is that the 3rd road and the 4th the examination of road test-loading oil circuit connection diagram in the present invention；
Fig. 7 is the enlarged drawing of part A in Fig. 6；
Fig. 8 is the enlarged drawing of part B in Fig. 6.
Reference：A1~A5 is torque, speed probe, and B1~B3 is power displacement transducer, and C1~C23 passes for pressure
Sensor, D1~D9 is flowmeter, and F1~F2 is filter, and T1~T2 is temperature sensor, and I~VII is oil circuit interface.
Embodiment
The present invention is described further below in conjunction with the accompanying drawings.
As shown in figures 1-8, a kind of multifunctional solution compression testing device, including hydraulic test system, hydraulic test loading system
And controller；
The hydraulic test system includes open type and tests oil circuit and enclosed experiment oil circuit, and the open type experiment oil circuit includes electricity
The sensitive control valve group of machine, open type variable pump, filter, test load and test element are connected in sequence, the test load
Sensitive control valve group includes multiple control valve blocks arranged side by side, and each control valve block entrance is connected with same filter, multiple controls
Valve block outlet processed individually connects a test element so that master trip oil circuit is divided into multiple branch arranged side by side after the filters
Oil circuit, so as to form multichannel open type experiment branch oil circuit；The enclosed experiment oil circuit includes motor, enclosed variable pump and enclosed motor
It is connected in sequence, forms enclosed experiment oil circuit；
The hydraulic test loading system includes the sensitive control valve of frequency converter, motor, constant displacement pump, filter, offered load
Group, bridge-type combination valve and loading element are connected in sequence, and the sensitive control valve group of the offered load includes multiple controls arranged side by side
Valve block processed, each control valve block entrance is connected with same filter, and multiple control valve block outlets individually connect a bridge
Formula combination valve, each bridge-type combination valve individually connects a loading element so that main loading oil circuit is divided into after the filters
Multiple branch oil circuits arranged side by side, so as to form multichannel loading branch oil circuit；
Each experiment oil circuit is corresponding with each loading oil circuit to be connected, i.e., enclosed motor, test element respectively with loading element one
One correspondence connection, is provided with torque rotary speed sensor, between test element and loading element between enclosed motor and loading element
It is provided with sensor；
The control valve block includes pressure-compensated valve, electric-hydraulic proportion commutation main valve, 2 electric proportional reversing valves and shuttle valve, pressure
Force compensating valve inlet is connected with filter, its outlet is connected with electric-hydraulic proportion commutation main valve inlet；In hydraulic test system, electricity
Liquid proportional commutation Main valve outlet is connected with corresponding test element, in hydraulic test loading system, electric-hydraulic proportion commutation main valve
Outlet is connected with corresponding loading element；Shuttle valve left end is connected with pressure-compensated valve and electric-hydraulic proportion commutation main valve respectively, right-hand member
It is connected with the upper end of the shuttle valve in next control valve block；The left end outlet of 2 electric proportional reversing valves is changed with electric-hydraulic proportion respectively
Connected to the left end and right-hand member of main valve, electric proportional reversing valve right-hand member entrance is connected with control oil circuit；
In the hydraulic test system, the shuttle valve is connected with open type variable pump, forms pressure feedback oil circuit；
In hydraulic test loading system, be connected with electric proportional pressure control valve on the bridge-type combination valve, the constant displacement pump with
It is provided between offered load sensitivity control valve group on overflow oil circuit, the overflow oil circuit and is provided with constant difference overflow valve, the shuttle
Valve is connected with constant difference overflow valve, forms pressure feedback oil circuit, and is provided between shuttle valve and constant difference overflow valve pressure sensor,
The quantitative pump discharge is provided with pressure sensor；
The torque rotary speed sensor, sensor, pressure sensor, motor, frequency converter, enclosed variable pump, filter, electricity
Proportional reversing valve and electric proportional pressure control valve are electrically connected with the controller.
The test element is open type motor or oil cylinder, and the loading element is loading motor, load pump or loading cylinder；Its
In, the connection corresponding with loading motor or load pump of open type motor, oil cylinder connection corresponding with loading cylinder.
Open type motor with loading motor or load pump it is corresponding connection when, the sensor be torque rotary speed sensor；Oil cylinder
During connection corresponding with loading cylinder, the sensor is power displacement transducer.
Oil overflow road leading point is located between constant displacement pump and filter.
The hydraulic test loading system also includes repairing oil circuit, and repairing oil circuit, which is included in after filter, is sequentially connected repairing
Valve block and pressure-reducing valve are controlled, pressure-reducing valve is connected with bridge-type combination valve.
Also include oil return cooling system, the oil return cooling system be sequentially connected including filter, cooler and fuel tank and
Into；The test element, loading element and constant difference overflow valve are connected by pipeline with filter, and the electric proportional pressure control valve passes through
Pipeline is connected with fuel tank；The oil return cooling system also includes motor, open type variable pump, pressure sensor, motor for cooling fan
The oil return cooling oil path being connected in sequence by pipeline, motor, pressure sensor are electrically connected with the controller, motor for cooling fan
It is connected, open type variable pump inlet is connected with fuel tank, open type variable pump pumps out the oil return in fuel tank, is passed through with fuel tank by pipeline
Motor for cooling fan sends fuel tank back to again after being cooled down；The enclosed variable pump, open type variable pump and constant displacement pump pass through pipeline
It is connected with fuel tank.
In enclosed experiment oil circuit, torque rotary speed sensor is provided between motor and enclosed variable pump, enclosed becomes
Amount pump discharge is disposed with pressure sensor and flowmeter；In open type experiment oil circuit, motor and open type variable pump it
Between be provided with torque rotary speed sensor, open type variable pump discharge is provided with pressure sensor, and filter outlet is connected with flowmeter；
In each branch experiment oil circuit, flowmeter and pressure sensor are respectively disposed between each control valve block and test element；
Filter outlet is connected with flowmeter in the loading system, and constant difference overflow valve outlet is connected with flowmeter；The electric ratio
Overflow valve porch and bridge-type combination valve porch are provided with pressure sensor；And torque rotary speed sensor, pressure sensor
It is electrically connected with the controller with flowmeter.
Specifically, a kind of multifunctional solution compression testing device, including hydraulic test system, hydraulic test loading system and control
Device；Hydraulic test system includes 1 tunnel enclosed experiment oil circuit and 1 open type experiment working connection, and tests the stream of working connection in open type
5 tunnel open type experiment branch oil circuits are specifically divided into after gauge；Hydraulic test loading system includes 1 loading working connection, and in flowmeter
After be specifically divided into 6 tunnels loading branch oil circuit and 1 tunnel repairing oil circuit；
Open type tests working connection：Motor 2, torque rotary speed sensor, open type variable pump, pressure sensor, filter and stream
Gauge is sequentially connected, wherein, connected between motor 2, torque rotary speed sensor, open type variable pump by shaft coupling, open type variable
Connected between pump, pressure sensor, filter, flowmeter by pipeline；Motor 2, torque rotary speed sensor, pressure sensor,
Filter and flowmeter are electrically connected with the controller, and open type variable pump inlet is connected with fuel tank by pipeline；
Load working connection：Frequency converter, motor 3, constant displacement pump, pressure sensor, filter and flowmeter are sequentially connected, its
In, connected between motor 3, constant displacement pump by shaft coupling, pipeline is passed through between constant displacement pump, pressure sensor, filter, flowmeter
Connection；Frequency converter, pressure sensor, filter and flowmeter are electrically connected with the controller, and quantitative pump intake passes through pipe with fuel tank
Road is connected；Overflow oil circuit is connected with by pipeline between constant displacement pump and filter, overflow oil circuit is provided with constant difference overflow valve.
First via experiment-loading oil circuit (enclosed tests oil circuit connection corresponding with the 1st tunnel loading branch oil circuit)：
Enclosed tests oil circuit：Motor 1, torque rotary speed sensor, enclosed variable pump, pressure sensor, flowmeter, enclosed horse
It is sequentially connected up to 1, wherein, connected between motor 1, torque rotary speed sensor, enclosed variable pump by shaft coupling, enclosed variable
Connected between pump, pressure sensor, flowmeter, enclosed motor 1 by pipeline；Motor 1, torque rotary speed sensor, enclosed variable
Pump, pressure sensor, flowmeter are electrically connected with the controller；
1st tunnel loads branch oil circuit：Control valve block 1, pressure sensor, bridge-type combination valve, loading motor 1 or load pump 1 logical
Cross pipeline to be sequentially connected, pressure sensor and electric proportional pressure control valve are connected with turn by pipeline on bridge-type combination valve；Pressure is passed
Sensor, electric proportional pressure control valve are electrically connected with the controller；
Torque rotary speed sensor, torque are connected with by shaft coupling between enclosed motor 1 and loading motor 1 or load pump 1
Speed probe is electrically connected with the controller.
Second the examination of road tests-loading oil circuit (connection corresponding with the 2nd tunnel loading branch oil circuit of the 1st tunnel open type experiment branch oil circuit)：
1st tunnel open type experiment branch oil circuit：Control valve block 1, flowmeter, pressure sensor, open type motor 2 by pipeline successively
Connection；Flowmeter, pressure sensor are electrically connected with the controller；
2nd tunnel loads branch oil circuit：Control valve block 2, pressure sensor, bridge-type combination valve, loading motor 2 or load pump 2 logical
Cross pipeline to be sequentially connected, pressure sensor and electric proportional pressure control valve are connected with turn by pipeline on bridge-type combination valve；Pressure is passed
Sensor, electric proportional pressure control valve are electrically connected with the controller；
Torque rotary speed sensor, torque are connected with by shaft coupling between enclosed motor 2 and loading motor 2 or load pump 2
Speed probe is electrically connected with the controller.
3rd the examination of road tests-loading oil circuit (connection corresponding with the 3rd tunnel loading branch oil circuit of the 2nd tunnel open type experiment branch oil circuit)：
2nd tunnel open type experiment branch oil circuit：Control valve block 2, flowmeter, pressure sensor, open type motor 3 by pipeline successively
Connection；Flowmeter, pressure sensor are electrically connected with the controller；
3rd tunnel loads branch oil circuit：Control valve block 3, pressure sensor, bridge-type combination valve, loading motor 3 or load pump 3 logical
Cross pipeline to be sequentially connected, pressure sensor and electric proportional pressure control valve are connected with turn by pipeline on bridge-type combination valve；Pressure is passed
Sensor, electric proportional pressure control valve are electrically connected with the controller；
Torque rotary speed sensor, torque are connected with by shaft coupling between enclosed motor 3 and loading motor 3 or load pump 3
Speed probe is electrically connected with the controller.
4th the examination of road tests-loading oil circuit (connection corresponding with the 4th tunnel loading branch oil circuit of the 3rd tunnel open type experiment branch oil circuit)：
3rd tunnel open type experiment branch oil circuit：Control valve block 3, flowmeter, pressure sensor, oil cylinder 1 are connected successively by pipeline
Connect；Flowmeter, pressure sensor are electrically connected with the controller；
4th tunnel loads branch oil circuit：Control valve block 4, pressure sensor, hydraulic lock 1, bridge-type combination valve, loading cylinder 1 pass through pipe
Road is sequentially connected, and pressure sensor and electric proportional pressure control valve are connected with turn by pipeline on bridge-type combination valve；Pressure sensor,
Electric proportional pressure control valve is electrically connected with the controller；
Strong displacement transducer, power displacement transducer and controller electricity are connected by shaft coupling between oil cylinder 1 and loading cylinder 1
Connection.
5th the examination of road tests-loading oil circuit (connection corresponding with the 5th tunnel loading branch oil circuit of the 4th tunnel open type experiment branch oil circuit)：
4th tunnel open type experiment branch oil circuit：Control valve block 4, flowmeter, pressure sensor, oil cylinder 2 are connected successively by pipeline
Connect；Flowmeter, pressure sensor are electrically connected with the controller；
5th tunnel loads branch oil circuit：Control valve block 5, pressure sensor, hydraulic lock 2, bridge-type combination valve, loading cylinder 2 pass through pipe
Road is sequentially connected, and pressure sensor and electric proportional pressure control valve are connected with turn by pipeline on bridge-type combination valve；Pressure sensor,
Electric proportional pressure control valve is electrically connected with the controller；
Strong displacement transducer, power displacement transducer and controller electricity are connected by shaft coupling between oil cylinder 2 and loading cylinder 2
Connection.
6th the examination of road tests-loading oil circuit (connection corresponding with the 6th tunnel loading branch oil circuit of the 5th tunnel open type experiment branch oil circuit)：
5th tunnel open type experiment branch oil circuit：Control valve block 5, flowmeter, pressure sensor, oil cylinder 3 are connected successively by pipeline
Connect；Flowmeter, pressure sensor are electrically connected with the controller；
6th tunnel loads branch oil circuit：Control valve block 6, pressure sensor, hydraulic lock 3, bridge-type combination valve, loading cylinder 3 pass through pipe
Road is sequentially connected, and pressure sensor and electric proportional pressure control valve are connected with turn by pipeline on bridge-type combination valve；Pressure sensor,
Electric proportional pressure control valve is electrically connected with the controller；
Strong displacement transducer, power displacement transducer and controller electricity are connected by shaft coupling between oil cylinder 3 and loading cylinder 3
Connection.
The repairing oil circuit of loading system：Repairing control valve block, pressure-reducing valve, pressure sensor, bridge-type combination valve are passed sequentially through
Pipeline is connected, and pressure sensor is electrically connected with the controller, after each road loads branch oil circuit fuel cut-off, due to inertia force effect,
Each loading motor, load pump will be rotated further, and each loading cylinder will move on, and will not be stopped at once, and oil-feed port, which turns into, to be inhaled
Hydraulic fluid port produces hole, and when loading element is working condition, pressure rises, and hole produces cavitation erosion by conquassation, damages loading member
Part, repairing oil circuit is exactly to play a part of repairing between each loading branch oil circuit fuel cut-off and loading element are stopped.
The oil return cooling system of loading system：Oil return cooling system include filter, cooler and fuel tank by pipeline according to
It is secondary to be formed by connecting, temperature sensor is provided with cooler and fuel tank, temperature sensor is electrically connected with the controller；Test element,
Loading element, electric-hydraulic proportion commutation main valve and constant difference overflow valve are connected by return line with filter, and oil return passes through filter
Suitable temperature is cooled to by cooler again after filtering and returns to fuel tank, so that enclosed variable pump, open type variable pump and constant displacement pump make
With electric proportional pressure control valve is connected by pipeline with fuel tank, and the oil return of electric proportional pressure control valve directly returns to fuel tank；Enclosed variable pump,
The entrance of open type variable pump and constant displacement pump is connected by pipeline with fuel tank.Also include motor 4, open type variable pump, pressure sensing
The oil return cooling oil path that device, motor for cooling fan are connected in sequence by pipeline, motor 4, pressure sensor and controller electricity
Connection, motor for cooling fan is connected with fuel tank by pipeline, opens up variable pump inlet and be connected with fuel tank, and open type variable pump is by fuel tank
In oil return pump out, send fuel tank back to again after the motor for cooling fan on oil return cooling oil path is cooled down so that in fuel tank
Oil reach suitable temperature.
(1) experiment of open type variable pump-motor and loading system (the second road and the 3rd the examination of road test-loading oil circuit)：Torque turns
Fast sensors A 5 is used for the output torque and rotating speed of measurement motor 2, A3, A4 are used to measuring the second road respectively and the 3rd the examination of road test-
The torque of loading oil circuit and rotating speed；Pressure sensor C22 measures the outlet pressure of open type variable pump, pressure sensor C19 measurements
The outlet pressure of constant displacement pump, C13, C14 are used for measurement enclosed motor and open type motor inlet pressure respectively, C3, C4, C5, C6 points
Loading branch oil circuit and electric proportional pressure control valve inlet pressure Yong Yu not measured；Flowmeter D2 measures the rate of discharge of open type variable pump,
Flowmeter D3 measures the rate of discharge of constant displacement pump, and flowmeter D4, D5 are used for the 1st road of measurement respectively and the 2nd tunnel open type experiment branch oil
Road flow.
Test principle is as shown in Figure 3：
1) the 1st road and the 2nd tunnel open type experiment branch oil circuit control：By controller provide in " open type experiment oil circuit " motor 2 with
The control command of control valve block 1 and control valve block 2, realizes the startup of oil circuit, stops in 1st road and the 2nd tunnel open type experiment branch oil circuit
Only, speed governing, forward and reverse motion；
2) the 2nd road and the loading branch oil circuit control of the 3rd tunnel：By controller provide in " hydraulic test loading system " motor 3 with
The control command of control valve block 2 and control valve block 3, realizes the startup, stopping, tune of oil circuit in 2nd road and the 3rd tunnel loading branch oil circuit
Fast, forward and reverse motion；
3) the closed loop load loading of loading branch oil circuit：From electric proportional overflow of the controller in " hydraulic test loading system "
Valve provides default loading electric signal, the loading moment of torsion exported by " electric proportional pressure control valve " regulation " loading motor/pump ".Then
The motor torque values of actual measurement are compared with preset torque value, control is defeated by using deviation value signal as input control signal
Device, calculates the value of electrical signals to induction signal, is defeated by electric proportional pressure control valve to control its inlet pressure size；By controlling electricity
The mode of proportional pressure control valve inlet pressure is realized carries out closed loop loading by default loading curve system；
4) open type tests the closed-loop drive of branch oil circuit：The electricity of control valve block 1 and 2 in from controller to " open type experiment oil circuit "
Proportional reversing valve provides default loading electric signal, and each electric-hydraulic proportion commutation valve core of main valve is adjusted by each electric proportional reversing valve
Aperture area, realizes the flow control of enclosed motor and open type motor oil circuit, realizes and the rotating speed of each motor is controlled.Then will be real
Each experiment branch oil circuit motor rotary speed value surveyed is compared with given rotating speed of target value, regard deviation value signal as input control
Signal is defeated by controller, calculates correspondence signal voltage value, is defeated by the electric proportional reversing valve in control valve block 1 and control valve block 2,
Thus the aperture area of each electric-hydraulic proportion commutation valve core of main valve is controlled, the flow of control enclosed motor and open type motor oil circuit is realized
Control, realizes the speed closed loop control of motor.
(2) experiment of enclosed variable pump-motor and loading system (first via experiment-loading oil circuit)：Torque rotary speed sensor
A1 is used for the output torque and rotating speed of measurement motor 1, the rotating speed of torque rotary speed sensor A2 measurement first via experiment-loading oil circuit
With torque.Pressure sensor C23 measures the outlet pressure of enclosed variable pump, and pressure sensor C19 measures the outlet pressure of constant displacement pump
Power, C1, C2 are respectively used to measurement loading branch oil circuit and electric proportional pressure control valve inlet pressure.Flowmeter D1 measurement enclosed variable pumps
Rate of discharge, flowmeter D3 measures the rate of discharge of constant displacement pump,.
Test principle is as shown in Figure 3：
1) enclosed experiment oil circuit control：The control command of motor 1 in " enclosed experiment oil circuit " is provided by controller, oil is realized
Startup, stopping, speed governing, forward and reverse motion on road；
2) the 1st tunnel loading branch oil circuit control：Motor 3 in " hydraulic test loading system " is provided by controller with the 1st tunnel to add
The control command that valve block 1 is controlled in branch oil circuit is carried, startup, stopping, speed governing, the forward and reverse motion of oil circuit is realized；
3) the closed loop load loading of loading branch oil circuit：From electric proportional overflow of the controller in " hydraulic test loading system "
Valve provides default loading electric signal, the loading moment of torsion exported by " electric proportional pressure control valve " regulation " loading motor/pump ".Then
The motor torque values of actual measurement are compared with preset torque value, control is defeated by using deviation value signal as input control signal
Device, calculates the value of electrical signals to induction signal, is defeated by electric proportional pressure control valve to control its inlet pressure size；By controlling electricity
The mode of proportional pressure control valve inlet pressure is realized carries out closed loop loading by default loading curve system；
(3) open type variable pump-testing of oil cylinder and loading system (the 4th tunnel, the 5th road and the 6th the examination of road test-loading oil circuit)：
Pressure sensor C22 measures the outlet pressure of open type variable pump, and pressure sensor C19 measures the outlet pressure of constant displacement pump, flow
The rate of discharge that D2 measures open type variable pump is counted, flowmeter D3 measures the rate of discharge of constant displacement pump, and flowmeter D6, D7, D8 are used for
The 3rd tunnel of measurement, the 4th tunnel, the 5th tunnel open type test branch oil circuit flow respectively, and pressure sensor C15, C16, C17 are used to measure respectively
The inlet pressure of oil cylinder 1, oil cylinder 2 and oil cylinder 3, C7, C8, C9, C10, C11, C12 are respectively used to measurement loading branch oil circuit to be compared with electricity
Example overflow valve inlet pressure.Power displacement transducer B1, B2, B3 are used for the 4th tunnel of measurement, the 5th road and the 6th the examination of road respectively and test-add
Carry the power of oil cylinder and loading cylinder, displacement in oil circuit.
Test principle is as shown in Figure 3：
1) the 3rd tunnel, the 4th tunnel, the 5th tunnel open type experiment branch oil circuit control：Provide electric in " open type experiment oil circuit " by controller
Machine 2 and control valve block 3, control valve block 4, the control command for controlling valve block 5, realize the startup, stopping, displacement movement of oil circuit；
2) the 4th tunnel, the 5th tunnel, the loading branch oil circuit control of the 6th tunnel：Provide electric in " hydraulic test loading system " by controller
Machine 3 and control valve block 4, control valve block 5, the control command for controlling valve block 6, realize the startup, stopping, displacement movement of oil circuit；
3) the closed loop load loading of loading branch oil circuit：From electric proportional overflow of the controller in " hydraulic test loading system "
Valve provides default loading electric signal, the loading force exported by " electric proportional pressure control valve " regulation " loading cylinder ".Then will actual measurement
Loading cylinder output force value be compared with default force value, using deviation value signal as input control signal be defeated by controller, count
The value of electrical signals to induction signal is calculated, is defeated by electric proportional pressure control valve to control its inlet pressure size；Pass through " electric proportional overflow
The loading force of valve " regulation " loading cylinder " output, realizes and carries out closed loop loading by default loading curve system；
4) open type tests the closed-loop drive of branch oil circuit：Control valve block 3, control valve in from controller to " open type experiment oil circuit "
The electric proportional reversing valve of piece 4 and control valve block 5 provides default loading electric signal, adjusts each electro-hydraulic by each electric proportional reversing valve
The aperture area of ratio commutation valve core of main valve, adjusts the flow of each oil path in oil cylinder, realizes each oil cylinder output speed control.Then will
Each oil cylinder output speed value of actual measurement is compared with given rotating speed of target value, regard deviation value signal as input control signal
Controller is defeated by, correspondence signal voltage value is calculated, the electric ratio in control valve block 3, control valve block 4 and control valve block 5 is defeated by
Reversal valve, thus controls the aperture area of each electric-hydraulic proportion commutation valve core of main valve, realizes the flow control of each oil cylinder of control, realizes
The output speed closed-loop control of each oil cylinder.
(4) repairing oil circuit：Flowmeter D3 is used to measure constant displacement pump rate of discharge, and C19 is used for the outlet pressure for measuring constant displacement pump
Power, C18 is used to measure decompression valve outlet pressure.
Test principle is as shown in Figure 3：Provide motor 3 in " repairing oil circuit " by controller controls the control of valve block to order with repairing
Order, Fill valve is opened, and realizes oil circuit repairing.
Specific closed-loop drive, closed loop flow regulation, closed loop load loading regulation are as follows：
(1) Loadsensing control multifunction test device such as Fig. 3 shows：Be substantially carried out open type variable pump-motor hydraulic system,
The hydraulic drive and control performance test of enclosed variable pump-motor hydraulic system, open type variable pump-to-cylinder hydraulic system；Carry out phase
Hydraulic Elements (pump, motor, cylinder, major control valve) basic performance test answered；HYDRAULIC CONTROL SYSTEM function and performance test.
(2) hydraulic test system realizes all-hydraulic multiloop while the technical scheme of operating condition of test is：Using " variable pump+
Load-sensitive ", " constant displacement pump+load-sensitive " control, can be achieved all-hydraulic multiloop operating condition of test, single loop experiment work simultaneously
Condition, single hydraulic element test.Load sensitive system can reduce hydraulic system energy consumption simultaneously, improve system controllability and measurability, reduce system
Oil temperature, extends the hydraulic system life-span.When only needing a certain or a few loop test, the Zhi Huilu for needing to test is opened,
All test loops need not be opened, energy-saving purpose is realized.
" constant displacement pump+load-sensitive valve " realize many mechanisms of hydraulic test loading system can simultaneously operation principle (such as Fig. 1,
Shown in Fig. 4)：Ioad-sensing control valve structure (mainly by electric-hydraulic proportion commutate main valve, electric proportional reversing valve, pressure-compensated valve,
Shuttle valve etc. is constituted) in shuttle valve the maximum pressure of load is passed to the constant difference overflow valve of quantitative pump discharge so that adjustment quantitative
The pressure ratio highest load pressure of pump output is slightly higher, so that multi-load works simultaneously.The principle of constant difference overflow valve is：(Pp-
PL) A=F.In formula：PpIt is the outlet pressure of pump, PLIt is highest load pressure, A is the area of valve element, and F is the precompressed of spring
Power, therefore the outlet pressure of pump is higher by F/A than highest load pressure all the time.The speed of pressure-compensated valve proof load will not be because
The pressure of another load and the change of speed and change.Realize that system energy consumption is low, precision is high, and can realize synchronous dynamic
The several hydraulic loaded executive components made are not interfere with each other in motion.
(3) hydraulic test system realizes that closed-loop drive is specially：Used on each experiment oil circuit " electric proportional reversing valve+
Electric-hydraulic proportion commutation main valve+speed probe (displacement transducer) " closed-loop control.All-hydraulic loop operating condition of test simultaneously can be achieved
Closed-loop drive, the closed-loop drive of single loop operating condition of test, the closed-loop drive of single hydraulic element test operating mode.
Used on each experiment oil circuit " electric proportional reversing valve+electric-hydraulic proportion commutation main valve+speed probe (or position
Displacement sensor) " closed-loop drive is by controller control, and experiment branch oil circuit speed control principle is as shown in Figure 1：The horse that experiment branch oil circuit is measured
It is compared up to tachometer value with given rotating speed of target value, is defeated by controller using deviation value signal as input control signal, counts
Correspondence signal voltage value is calculated, the electric proportional reversing valve in control valve block is defeated by, electric-hydraulic proportion commutation valve core of main valve is thus controlled
Aperture area, realize control motor oil circuit flow control, realize the speed closed loop control of motor.If actual measurement tachometer value is less than
Desired value, then both differences be defeated by the control electric signal of electric proportional reversing valve as input signal to controller, make opening for valve element
Open area increases, and makes electric-hydraulic proportion commutation valve core of main valve control hydraulic fluid flow rate increase, acts on electric-hydraulic proportion commutation main valve valve
Core active force increases, the aperture area increase of valve core of main valve, makes the increase of experiment oil circuit flow, motor speed output increase；If real
Pressure measurement force value is higher than desired value, then the aperture area of valve core of main valve reduces, and subtracts the reduction of experiment oil circuit flow, motor speed output
It is small.
(4) hydraulic test loading system realizes pressure closed loop Flow-rate adjustment, realizes the technical scheme of hydraulic loaded energy-conservation and is：
When the output flow of constant displacement pump is more than the working flow of system, system pressure will be raised；Otherwise system pressure is pressed less than setting
Power.Load branch oil circuit pressure closed loop flow Principles of Regulation as shown in Figure 1：The maximum pressure of load is passed to and quantitatively pumped out by shuttle valve
The constant difference overflow valve of mouth, while the maximum pressure signal that pressure sensor is measured is compared with given target pressure value, will
Deviation value signal is defeated by controller as input control signal, calculates the value of electrical signals to induction signal, is defeated by frequency converter to control
The rotating speed of motor 3 processed, is realized by way of the rotating speed of controlled motor 3 to loading branch oil circuit closed loop flow regulation.If observed pressure value
Less than desired value, then both differences are output as rotating speed control voltage signal to frequency converter, make electricity as input signal to controller
The raising speed of machine 3, flow system flow increase, pressure rises；If observed pressure value is higher than desired value, the reduction of speed of motor 3, flow system flow subtracts
Small, pressure declines.
In summary：No matter total system is while operating condition of test or one or several oil circuit operating condition of test, turn of motor 3
Speed can change with the change of operating mode, realize pressure closed loop Flow-rate adjustment, play the energy-saving effect of fuel feeding on demand.
The rotating speed of motor 3 changes principle with the change of load pressure：In hydraulic test loading system, constant displacement pump stream
Amount and the relation of the rotating speed of motor 3 are
Q=nq (4.1)
N-motor speed in formula, the discharge capacity of q-constant displacement pump, the flow of Q-constant displacement pump, wherein motor speed are
N=60f/p (4.2)
In formula：F-supply frequency, P-magnetic pole logarithm combine formula (4.1), (4.2), can obtain
Q=60fq/p=kf (4.3)
K-proportionality coefficient in formula, k=60q/p, for the flow of each determination, by formula (4.3) can obtain one with
Corresponding frequency:
F=Q/k (4.4)
According to formula (4.4), it is possible to the flow of each operation stage is converted into corresponding frequency, thus theoretically
Solve the problem of frequency is determined.For constant displacement pump, flow is directly proportional to rotating speed, and shaft power and rotating speed cube into just
Than that is,:
Q ∝ n, P ∝ n3 (4.5)
According to above-mentioned relation, the flow of pump is directly proportional to rotating speed, and when system flow demand is reduced, then motor speed will drop
It is low；Shaft power and rotating speed cube are directly proportional, and motor speed reduction, its shaft power is greatly reduced.Frequency conversion flow control as can be seen here
Fixture has fairly obvious energy-saving effect.
(5) hydraulic test loading system realizes that the technical scheme of closed loop load Loading Control is：Load closed loop Loading Control
Principle by taking pump-motor experiment oil circuit loading as an example as shown in figure 1, introduce：Hydraulic test loading system operating mode and hydraulic test system
System Conditions Matching, closed loop loading is carried out by default loading curve system.The torque value size that torque, speed probe are measured by
Unlatching (oil inlet) pressure of electric proportional pressure control valve is determined in hydraulic test loading system, the unlatching (oil-feed of electric proportional pressure control valve
Mouthful) pressure determines by the default loading curve of controller.The torque value of actual measurement is compared with preset torque value, and deviation is believed
Number as input control signal be defeated by controller, calculate the value of electrical signals to induction signal, be defeated by electric proportional pressure control valve to control
Its inlet pressure size；Realized by way of controlling electric proportional pressure control valve inlet pressure by default loading curve system
Carry out closed loop loading.If surveying torque value is less than desired value, both differences, to controller, are output as torque as input signal
Electric signal is controlled to electric proportional pressure control valve, the electric proportional pressure control valve inlet pressure of rise, the increase of the hydraulic loaded moment of resistance, experiment system
Torque value of uniting rises；If surveying torque value value is higher than desired value, the electric proportional pressure control valve inlet pressure of reduction, hydraulic loaded resistance
Square reduces, and pilot system torque value reduces.
The principle that hydraulic test system torque value changes with the change that hydraulic test loading system is loaded：
Enclosed or open type motor output torque value and the relation of oil circuit pressure are in hydraulic test system：
In formula：T- motor reality output torques, ηm- motor mechanical efficiency, TL- motor theory output torque, V- motors row
Amount, p- motor operations pressure.
The equilibrium equation formula of valve element：
In formula：The hydraulic coupling controlled in F- proportion electro-magnet power outputs, d- diameters, p- pilot valves valve pocket, the stream of C- valves
Coefficient of discharge, the displacement of x- valve elements,- poppet spool valve goes out Liu Jiao, FfThe kinetic friction force of the motion parts such as-valve element, armature.
The suction equation formula F=F of proportion electro-magnetL+FB=CFI2 (5.3)
In formula：FLThe conical surface power of-proportion electro-magnet, FBThe bottom surface power of-proportion electro-magnet, CFThe suction of-proportion electro-magnet
Force coefficient, I—Control electric current.
Ignore the influence such as valve internal friction and valve flow, according to stress balance relation, the pressure and control electricity of valve can be drawn
Relation between stream is：
Simultaneous (5.1) is obtained with (5.4) formula:
Show the steady-state behaviour of electric proportional pressure control valve, i.e. valve pressure output control with the quadratic power of input control electric current into just
Than.The influence of the factors such as negligible friction, then can be derived that valve input control electric current size determines that its pressure output control is big
It is small.
According to formula (5.1~5.5), it is possible to which the torque of each operation stage is converted into corresponding electric current, thus from
The problem of electric current is determined is solved in theory.For motor, torque is directly proportional to current squaring, pressure and current squaring into
Direct ratio, i.e.,:
P∝I2, T ∝ I2 (5.6)
Similarly, the thrust of oil cylinder and the relation of oil circuit pressure are in hydraulic test system：F=π R2P (5.7)
In formula, the thrust of F- oil cylinders；R- oil cylinder radiuses；P- oil circuit pressures；
Simultaneous (5.4) is obtained with (5.7) formula:
Similarly, according to formula (5.7~5.8), for oil cylinder, thrust is directly proportional to current squaring, and pressure is put down with electric current
Side is directly proportional, i.e.,：
P∝I2, F ∝ I2。
The invention is not limited in foregoing embodiment.The present invention, which is expanded to, any in this manual to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.If this
Art personnel, the unsubstantiality done in the spirit for not departing from the present invention is altered or modified, and should all belong to power of the present invention
The claimed scope of profit.
Claims (7)
1. a kind of multifunctional solution compression testing device, it is characterised in that：Including hydraulic test system, hydraulic test loading system and control
Device processed；
The hydraulic test system includes open type and tests oil circuit and enclosed experiment oil circuit, open type experiment oil circuit include motor,
The sensitive control valve group of open type variable pump, filter, test load and test element are connected in sequence, and the test load is sensitive
Control valve group includes multiple control valve blocks arranged side by side, and each control valve block entrance is connected with same filter, multiple control valves
Piece outlet individually connects a test element so that master trip oil circuit is divided into multiple branch oil arranged side by side after the filters
Road, so as to form multichannel open type experiment branch oil circuit；Enclosed experiment oil circuit include motor, enclosed variable pump and enclosed motor according to
It is secondary to be formed by connecting, form enclosed experiment oil circuit；
The hydraulic test loading system includes the sensitive control valve group of frequency converter, motor, constant displacement pump, filter, offered load, bridge
Formula combination valve and loading element are connected in sequence, and the sensitive control valve group of the offered load includes multiple control valves arranged side by side
Piece, each control valve block entrance is connected with same filter, and multiple control valve block outlets individually connect a bridge-type group
Valve is closed, each bridge-type combination valve individually connects a loading element so that main loading oil circuit is divided into multiple after the filters
Branch oil circuit arranged side by side, so as to form multichannel loading branch oil circuit；
Each experiment oil circuit is corresponding with each loading oil circuit to be connected, i.e., enclosed motor, test element respectively with a pair of loading element 1
It should connect, torque rotary speed sensor is provided between enclosed motor and loading element, be set between test element and loading element
There is sensor；
The control valve block includes pressure-compensated valve, electric-hydraulic proportion commutation main valve, 2 electric proportional reversing valves and shuttle valve, and pressure is mended
Repay valve inlet be connected with filter, its outlet with electric-hydraulic proportion commutate main valve inlet be connected；In hydraulic test system, electro-hydraulic ratio
Example commutation Main valve outlet is connected with corresponding test element, in hydraulic test loading system, electric-hydraulic proportion commutation Main valve outlet
Connected with corresponding loading element；Shuttle valve left end is connected with pressure-compensated valve and electric-hydraulic proportion commutation main valve respectively, and right-hand member is with
The upper end connection of shuttle valve in one control valve block；The left end outlet of 2 electric proportional reversing valves commutates with electric-hydraulic proportion respectively to be led
Left end and the right-hand member connection of valve, electric proportional reversing valve right-hand member entrance are connected with control oil circuit；
In the hydraulic test system, the shuttle valve is connected with open type variable pump；
In hydraulic test loading system, electric proportional pressure control valve, the constant displacement pump and loading are connected with the bridge-type combination valve
Be provided between Ioad-sensing control valve group on overflow oil circuit, the overflow oil circuit and be provided with constant difference overflow valve, the shuttle valve with
Constant difference overflow valve is connected, and is provided between shuttle valve and constant difference overflow valve pressure sensor, and the quantitative pump discharge is provided with
Pressure sensor；
The torque rotary speed sensor, sensor, pressure sensor, motor, frequency converter, enclosed variable pump, filter, electric ratio
Reversal valve and electric proportional pressure control valve are electrically connected with the controller.
2. a kind of multifunctional solution compression testing device according to claim 1, it is characterised in that：The test element is open type
Motor or oil cylinder, the loading element are loading motor, load pump or loading cylinder；Wherein, open type motor is with loading motor or adding
Carry pump correspondence to connect, oil cylinder connection corresponding with loading cylinder.
3. a kind of multifunctional solution compression testing device according to claim 2, it is characterised in that：Open type motor and loading motor
Or during load pump correspondence connection, the sensor is torque rotary speed sensor；Oil cylinder with loading cylinder it is corresponding connect when, the sensing
Device is power displacement transducer.
4. a kind of multifunctional solution compression testing device according to claim 1, it is characterised in that：Oil overflow road leading point
Between constant displacement pump and filter.
5. a kind of multifunctional solution compression testing device according to claim 1, it is characterised in that：The hydraulic test loading system
System also includes repairing oil circuit, and repairing oil circuit, which is included in after filter, is sequentially connected repairing control valve block and pressure-reducing valve, pressure-reducing valve with
Bridge-type combination valve is connected.
6. a kind of multifunctional solution compression testing device according to claim 1, it is characterised in that：Also include oil return cooling system
System, the oil return cooling system is connected in sequence including filter, cooler and fuel tank；The test element, loading element
It is connected with constant difference overflow valve by pipeline with filter, the electric proportional pressure control valve is connected by pipeline with fuel tank；The oil return
Cooling system also includes motor, open type variable pump, pressure sensor, motor for cooling fan and passes through returning that pipeline is connected in sequence
Oily cooling oil path, motor, pressure sensor are electrically connected with the controller, and motor for cooling fan is connected by pipeline with fuel tank, open type
Variable pump inlet is connected with fuel tank, and open type variable pump pumps out the oil return in fuel tank, after motor for cooling fan is cooled down
Send fuel tank back to again；The enclosed variable pump, open type variable pump and constant displacement pump are connected by pipeline with fuel tank.
7. a kind of multifunctional solution compression testing device according to claim 1, it is characterised in that：Oil circuit is tested in the enclosed
In, torque rotary speed sensor is provided between motor and enclosed variable pump, enclosed variable pump discharge is disposed with pressure sensing
Device and flowmeter；In open type experiment oil circuit, torque rotary speed sensor, open type are provided between motor and open type variable pump
Variable pump discharge is provided with pressure sensor, and filter outlet is connected with flowmeter；In each branch experiment oil circuit, valve block is respectively controlled
Flowmeter and pressure sensor are respectively disposed between test element；Filter outlet connects in the loading system
Flowmeter is connected to, constant difference overflow valve outlet is connected with flowmeter；The electric proportional pressure control valve porch and bridge-type combination valve inlet
Place is provided with pressure sensor；And torque rotary speed sensor, pressure sensor and flowmeter are electrically connected with the controller.
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