CN107061415B - A kind of multifunctional solution compression testing device - Google Patents
A kind of multifunctional solution compression testing device Download PDFInfo
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- CN107061415B CN107061415B CN201710426323.0A CN201710426323A CN107061415B CN 107061415 B CN107061415 B CN 107061415B CN 201710426323 A CN201710426323 A CN 201710426323A CN 107061415 B CN107061415 B CN 107061415B
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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 fields, disclose a kind of multifunctional solution compression testing device, including hydraulic test system, hydraulic test loading system and controller；Hydraulic test system includes open type experiment oil circuit and enclosed experiment oil circuit, and it includes that motor, open type variable pump, filter, test load sensitivity control valve group and test element are sequentially connected that open type, which tests oil circuit,；Hydraulic test loading system includes that frequency converter, motor, constant displacement pump, filter, offered load sensitivity control valve group, bridge-type combination valve and loading element are sequentially connected, experiment oil circuit is correspondingly connected 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 testing, single hydraulic element test, and 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.It is especially suitable
Research and development test for hydraulic construction machine.
Background technology
With continuous construction social in recent years and development, set in the construction of architectural engineering, tunnel, subway, highway etc.
In standby, the application of hydraulic construction machine occupies larger ratio.Especially hydraulic crawler excavator, hydraulic loader, hydraulic breaker
Almost at the indispensable hydraulic machinery of site construction.Novel hydraulic equipment 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, state at present
Hydraulic internal pressure test device is mostly the performance detection towards Hydraulic Elements, and a small number of multifunction hydraulic experiment dresses towards hydraulic system
It is single to set that there is also test functions, and application and research range are narrow, and test accuracy is low and not energy saving enough.
Invention content
The technical problem to be solved by the present invention is to：In view of the above problems, a kind of multifunction hydraulic examination is provided
Experiment device meets single loop experiment, multiloop while testing, 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 experiment oil circuit and enclosed experiment oil circuit, and the open type experiment oil circuit includes electricity
Machine, open type variable pump, filter, test load sensitivity control valve group 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 valve block entrance that controls is connect 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 tests branch oil circuit to form multichannel open type；The enclosed experiment oil circuit includes motor, enclosed variable pump and enclosed motor
It is connected in sequence, forms enclosed and test oil circuit；
The hydraulic test loading system includes frequency converter, motor, constant displacement pump, filter, offered load sensitivity control valve
Group, bridge-type combination valve and loading element are connected in sequence, and the offered load sensitivity control valve group includes multiple controls arranged side by side
Valve block processed, each valve block entrance that controls are connect with same filter, and multiple control valve block outlets individually connect a bridge
Formula combination valve, each bridge-type combination valve individually connect a loading element so that main loading oil circuit is divided into after the filters
Multiple branch oil circuits arranged side by side load branch oil circuit to form multichannel；
Each experiment oil circuit connection corresponding with each loading oil circuit, i.e. enclosed motor, test element respectively with loading element one
One is correspondingly connected with, and torque rotary speed sensor is provided between enclosed motor and loading element, between test element 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 connect with filter, its outlet is connect 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 connect with pressure-compensated valve and electric-hydraulic proportion commutation main valve respectively, right end
It is connect 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
It is connected to the left end of main valve with right end, electric proportional reversing valve right end entrance and control oil circuit connection；
In the hydraulic test system, the shuttle valve is connect 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
Overflow oil circuit is provided between offered load sensitivity control valve group, the oil overflow road is provided with constant difference overflow valve, the shuttle
Valve is connect with constant difference overflow valve, and pressure sensor is provided between shuttle valve and constant difference overflow valve, 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 load motor, load pump or load cylinder；Wherein, open type motor is correspondingly connected with load motor or load pump, oil
Cylinder is correspondingly connected with load cylinder.
A kind of multifunctional solution compression testing device of the present invention, open type motor are correspondingly connected with load motor or load pump
When, the sensor is torque rotary speed sensor；When oil cylinder is correspondingly connected with load cylinder, the sensor is power displacement sensing
Device.
A kind of multifunctional solution compression testing device of the present invention, the oil overflow pass, which goes out, is a little 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 further include repairing oil
Road, repairing oil circuit is sequentially connected repairing control valve block after being included in filter and pressure reducing valve, pressure reducing valve are connect with bridge-type combination valve.
A kind of multifunctional solution compression testing device of the present invention, further includes oil return cooling system, the oil return cooling system
System includes that filter, cooler and fuel tank are connected in sequence；The test element, loading element and constant difference overflow valve pass through pipe
Road is connect with filter, and the electricity proportional pressure control valve is connect by pipeline with fuel tank；The oil return cooling system further 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 connect by pipeline with fuel tank, and open type variable pump inlet connects with fuel tank
It connects, open type variable pump pumps out the oil return in fuel tank, and fuel tank is sent back to again after motor for cooling fan carries out cooling；The enclosed
Variable pump, open type variable pump and constant displacement pump are connect by pipeline with fuel tank.
A kind of multifunctional solution compression testing device of the present invention, in the enclosed tests oil circuit, motor becomes with enclosed
It is provided with torque rotary speed sensor between amount pump, enclosed variable pump discharge is disposed with pressure sensor and flowmeter；Institute
It states in open type experiment oil circuit, torque rotary speed sensor, the setting of open type variable pump discharge is provided between motor and open type variable pump
There are pressure sensor, filter outlet to be connected with flowmeter；It is each to control between valve block and test element in each branch tests oil circuit
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 electricity proportional pressure control valve inlet and bridge-type combination valve inlet are both 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, it can be achieved that all-hydraulic more times
Road while operating condition of test, single loop operating condition of test, single hydraulic element test.Realize that more hydraulic branch (or multiple Hydraulic Elements) can
It tests, and does not interfere with each other simultaneously mutually；It realizes 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 realize that the output flow of control pump reaches energy saving
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
It is loaded up to Hydraulic Power Transmission System, open type pump-to-cylinder Hydraulic Power Transmission System, load value is adjustable, completes preset hydraulic drive
With Control experiment.
(4) described device can be realized：All-hydraulic circuit is tested simultaneously, single loop is tested, single hydraulic element test.It realizes high
The work of efficiency, low power loss, short form test device.
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 of the invention connection diagram；
Fig. 4 is hydraulic test system structural schematic diagram in the present invention；
Fig. 5 is hydraulic test loading system structural schematic diagram in the present invention；
Fig. 6 is that-loading oil circuit connection diagram is tested in third road and the 4th road test 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 numeral：A1~A5 is torque, speed probe, and B1~B3 is power displacement sensor, and C1~C23 passes for pressure
Sensor, D1~D9 are flowmeter, and F1~F2 is filter, and T1~T2 is temperature sensor, and I~VII is oil circuit interface.
Specific implementation mode
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 experiment oil circuit and enclosed experiment oil circuit, and the open type experiment oil circuit includes electricity
Machine, open type variable pump, filter, test load sensitivity control valve group 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 valve block entrance that controls is connect 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 tests branch oil circuit to form multichannel open type；The enclosed experiment oil circuit includes motor, enclosed variable pump and enclosed motor
It is connected in sequence, forms enclosed and test oil circuit；
The hydraulic test loading system includes frequency converter, motor, constant displacement pump, filter, offered load sensitivity control valve
Group, bridge-type combination valve and loading element are connected in sequence, and the offered load sensitivity control valve group includes multiple controls arranged side by side
Valve block processed, each valve block entrance that controls are connect with same filter, and multiple control valve block outlets individually connect a bridge
Formula combination valve, each bridge-type combination valve individually connect a loading element so that main loading oil circuit is divided into after the filters
Multiple branch oil circuits arranged side by side load branch oil circuit to form multichannel；
Each experiment oil circuit connection corresponding with each loading oil circuit, i.e. enclosed motor, test element respectively with loading element one
One is correspondingly connected with, and torque rotary speed sensor is provided between enclosed motor and loading element, between test element 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 connect with filter, its outlet is connect 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 connect with pressure-compensated valve and electric-hydraulic proportion commutation main valve respectively, right end
It is connect 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
It is connected to the left end of main valve with right end, electric proportional reversing valve right end entrance and control oil circuit connection；
In the hydraulic test system, the shuttle valve is connect 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
Overflow oil circuit is provided between offered load sensitivity control valve group, the oil overflow road is provided with constant difference overflow valve, the shuttle
Valve is connect with constant difference overflow valve, forms pressure feedback oil circuit, and pressure sensor is provided between shuttle valve and constant difference overflow valve,
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 load motor, load pump or load cylinder；Its
In, open type motor is correspondingly connected with load motor or load pump, and oil cylinder is correspondingly connected with load cylinder.
When open type motor is correspondingly connected with load motor or load pump, the sensor is torque rotary speed sensor；Oil cylinder
When being correspondingly connected with load cylinder, the sensor is power displacement sensor.
The oil overflow pass goes out a little between constant displacement pump and filter.
The hydraulic test loading system further includes repairing oil circuit, and repairing oil circuit is sequentially connected repairing after being included in filter
Control valve block and pressure reducing valve, pressure reducing valve are connect with bridge-type combination valve.
Further include oil return cooling system, the oil return cooling system include filter, cooler and fuel tank be sequentially connected and
At；The test element, loading element and constant difference overflow valve are connect by pipeline with filter, and the electricity proportional pressure control valve passes through
Pipeline is connect with fuel tank；The oil return cooling system further 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 connect with fuel tank by pipeline, open type variable pump inlet is connect with fuel tank, and open type variable pump pumps out the oil return in fuel tank, is passed through
Motor for cooling fan sends fuel tank back to again after carrying out cooling；The enclosed variable pump, open type variable pump and constant displacement pump pass through pipeline
It is connect with fuel tank.
In the enclosed tests 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 the open type tests 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 tests oil circuit, each control respectively is disposed with flowmeter and pressure sensor between 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 electricity ratio
Overflow valve inlet and bridge-type combination valve inlet are both 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 tests 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 load working connection, and in flowmeter
After be specifically divided into 6 tunnels load 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 is connected by shaft coupling between motor 2, torque rotary speed sensor, open type variable pump, open type variable
Pass through piping connection between pump, pressure sensor, filter, flowmeter；Motor 2, torque rotary speed sensor, pressure sensor,
Filter and flowmeter are electrically connected with the controller, and open type variable pump inlet passes through piping connection with fuel tank；
Load working connection：Frequency converter, motor 3, constant displacement pump, pressure sensor, filter and flowmeter are sequentially connected,
In, it is connected by shaft coupling between motor 3, constant displacement pump, passes through pipeline 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 connects；There are overflow oil circuit, oil overflow road to be equipped with constant difference overflow valve by piping connection between constant displacement pump and filter.
First via experiment-loading oil circuit (enclosed tests oil circuit and the 1st tunnel load branch oil circuit is correspondingly connected with)：
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 by shaft coupling between motor 1, torque rotary speed sensor, enclosed variable pump, enclosed variable
Pass through piping connection between pump, pressure sensor, flowmeter, enclosed motor 1；Motor 1, torque rotary speed sensor, enclosed variable
Pump, pressure sensor, flowmeter are electrically connected with the controller；
1st tunnel loads branch oil circuit：It is logical to control valve block 1, pressure sensor, bridge-type combination valve, load motor 1 or load pump 1
It crosses pipeline to be sequentially connected, pressure sensor and electric proportional pressure control valve is connected in turn by pipeline on bridge-type combination valve；Pressure passes
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 load motor 1 or load pump 1
Speed probe is electrically connected with the controller.
- loading oil circuit is tested in second road test (the 1st tunnel open type experiment branch oil circuit and the 2nd tunnel load branch oil circuit are correspondingly connected with)：
1st tunnel open type tests 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：It is logical to control valve block 2, pressure sensor, bridge-type combination valve, load motor 2 or load pump 2
It crosses pipeline to be sequentially connected, pressure sensor and electric proportional pressure control valve is connected in turn by pipeline on bridge-type combination valve；Pressure passes
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 load motor 2 or load pump 2
Speed probe is electrically connected with the controller.
- loading oil circuit is tested in third road test (the 2nd tunnel open type experiment branch oil circuit and the 3rd tunnel load branch oil circuit are correspondingly connected with)：
2nd tunnel open type tests 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：It is logical to control valve block 3, pressure sensor, bridge-type combination valve, load motor 3 or load pump 3
It crosses pipeline to be sequentially connected, pressure sensor and electric proportional pressure control valve is connected in turn by pipeline on bridge-type combination valve；Pressure passes
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 load motor 3 or load pump 3
Speed probe is electrically connected with the controller.
- loading oil circuit is tested in 4th road test (the 3rd tunnel open type experiment branch oil circuit and the 4th tunnel load branch oil circuit are correspondingly connected with)：
3rd tunnel open type tests branch oil circuit：Control valve block 3, flowmeter, pressure sensor, oil cylinder 1 are connected successively by pipeline
It connects；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, load cylinder 1 pass through pipe
Road is sequentially connected, and pressure sensor and electric proportional pressure control valve are connected in turn by pipeline on bridge-type combination valve；Pressure sensor,
Electric proportional pressure control valve is electrically connected with the controller；
Strong displacement sensor, power displacement sensor and controller electricity are connected by shaft coupling between oil cylinder 1 and load cylinder 1
Connection.
- loading oil circuit is tested in 5th road test (the 4th tunnel open type experiment branch oil circuit and the 5th tunnel load branch oil circuit are correspondingly connected with)：
4th tunnel open type tests branch oil circuit：Control valve block 4, flowmeter, pressure sensor, oil cylinder 2 are connected successively by pipeline
It connects；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, load cylinder 2 pass through pipe
Road is sequentially connected, and pressure sensor and electric proportional pressure control valve are connected in turn by pipeline on bridge-type combination valve；Pressure sensor,
Electric proportional pressure control valve is electrically connected with the controller；
Strong displacement sensor, power displacement sensor and controller electricity are connected by shaft coupling between oil cylinder 2 and load cylinder 2
Connection.
- loading oil circuit is tested in 6th road test (the 5th tunnel open type experiment branch oil circuit and the 6th tunnel load branch oil circuit are correspondingly connected with)：
5th tunnel open type tests branch oil circuit：Control valve block 5, flowmeter, pressure sensor, oil cylinder 3 are connected successively by pipeline
It connects；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, load cylinder 3 pass through pipe
Road is sequentially connected, and pressure sensor and electric proportional pressure control valve are connected in turn by pipeline on bridge-type combination valve；Pressure sensor,
Electric proportional pressure control valve is electrically connected with the controller；
Strong displacement sensor, power displacement sensor and controller electricity are connected by shaft coupling between oil cylinder 3 and load cylinder 3
Connection.
The repairing oil circuit of loading system：Repairing control valve block, pressure reducing valve, pressure sensor, bridge-type combination valve pass sequentially through
Piping connection, pressure sensor are electrically connected with the controller, after each road loads branch oil circuit fuel cut-off, due to inertia force effect,
Each load motor, load pump will be rotated further, and each cylinder that loads will move on, and will not be stopped at once, and oil-feed port, which becomes, to be inhaled
Hydraulic fluid port generates hole, and when loading element is in working condition, pressure rises, and hole is crushed, and generates cavitation erosion, damage load member
Part, repairing oil circuit are exactly to play the role of repairing between each load 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 on 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 connect by oil 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 connect 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 connect by pipeline with fuel tank.Further 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 connect with fuel tank by pipeline, opens up variable pump inlet and connect with fuel tank, and open type variable pump is by fuel tank
In oil return pump out, by the motor for cooling fan on oil return cooling oil path carry out it is cooling after send fuel tank back to again so that in fuel tank
Oil reach suitable temperature.
(1) experiment of open type variable pump-motor and loading system (- loading oil circuit is tested in the second road and third road test)：Torque turns
Fast sensors A 5 is used for the output torque and rotating speed of measurement motor 2, A3, A4 for measure the second road respectively and third road test test-
The torque of loading oil circuit and rotating speed；Pressure sensor C22 measures the outlet pressure of open type variable pump, and pressure sensor C19 is measured
The outlet pressure of constant displacement pump, C13, C14 divide for measuring enclosed motor and open type motor inlet pressure, C3, C4, C5, C6 respectively
Load 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 for measuring the 1st road and the 2nd tunnel open type experiment branch oil respectively
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 movement；
2) the 2nd road and the 3rd tunnel load branch oil circuit control：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 load branch oil circuit
Fast, forward and reverse movement；
3) the closed loop load load of load branch oil circuit：From electric proportional overflow of the controller in " hydraulic test loading system "
Valve provides preset load electric signal, passes through the load torque of " electric proportional pressure control valve " adjusting " load motor/pump " output.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 load by preset loading curve system；
4) closed-loop drive of open type experiment 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 preset load electric signal, and each electric-hydraulic proportion commutation valve core of main valve is adjusted by each electric proportional reversing valve
Opening area realizes the flow control of enclosed motor and open type motor oil circuit, realizes and controls the rotating speed of each motor.It then will be real
Each experiment branch oil circuit motor rotary speed value surveyed is compared with given rotating speed of target value, using deviation value signal as input control
Signal is defeated by controller, calculates corresponding signal voltage value, is defeated by control valve block 1 and controls the electric proportional reversing valve in valve block 2,
Thus the opening area for controlling each electric-hydraulic proportion commutation valve core of main valve, realizes the flow of control enclosed motor and open type motor oil circuit
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, and torque rotary speed sensor A2 measures the rotating speed of 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 measure load branch oil circuit and electric proportional pressure control valve inlet pressure.Flowmeter D1 measures enclosed variable pump
Rate of discharge, flowmeter D3 measure 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, realizes oil
Startup, stopping, speed governing, forward and reverse movement on road；
2) the 1st tunnel load branch oil circuit control：Motor 3 in " hydraulic test loading system " is provided by controller with the 1st tunnel to add
The control command for controlling valve block 1 in branch oil circuit is carried, realizes startup, stopping, speed governing, the forward and reverse movement of oil circuit；
3) the closed loop load load of load branch oil circuit：From electric proportional overflow of the controller in " hydraulic test loading system "
Valve provides preset load electric signal, passes through the load torque of " electric proportional pressure control valve " adjusting " load motor/pump " output.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 load by preset loading curve system；
(3) open type variable pump-testing of oil cylinder and loading system (- loading oil circuit is tested in the 4th tunnel, the 5th road and the 6th road test)：
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, the 4th tunnel, the 5th tunnel open type experiment branch oil circuit flow are measured respectively, and pressure sensor C15, C16, C17 for measuring 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 measure load branch oil circuit and electric ratio
Example overflow valve inlet pressure.Power displacement sensor B1, B2, B3 are tested-are added for measuring the 4th tunnel, the 5th road and the 6th road test respectively
Carry the power of oil cylinder and load cylinder in oil circuit, displacement.
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：It is provided by controller electric in " open type experiment oil circuit "
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 6th tunnel load branch oil circuit control：It is provided by controller electric in " hydraulic test loading system "
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 load of load branch oil circuit：From electric proportional overflow of the controller in " hydraulic test loading system "
Valve provides preset load electric signal, passes through the loading force of " electric proportional pressure control valve " adjusting " load cylinder " output.It then will actual measurement
Load cylinder output force value be compared with default force value, be defeated by controller using deviation value signal as input control signal, 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 " adjusting " load cylinder " output, realizes and carries out closed loop load by preset loading curve system；
4) closed-loop drive of open type experiment 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 preset load electric signal, is adjusted by each electric proportional reversing valve each electro-hydraulic
The opening 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, using deviation value signal as input control signal
It is defeated by controller, calculates corresponding signal voltage value, be defeated by control valve block 3, control valve block 4 and controls the electric ratio in valve block 5
Thus reversal valve controls the opening area of each electric-hydraulic proportion commutation valve core of main valve, realizes the flow control for controlling each oil cylinder, realize
The output speed closed-loop control of each oil cylinder.
(4) repairing oil circuit：Flowmeter D3 is used to measure the outlet pressure of constant displacement pump for measuring constant displacement pump rate of discharge, C19
Power, C18 is for measuring decompression valve outlet pressure.
Test principle is as shown in Figure 3：Motor 3 and the control of repairing control valve block in " repairing oil circuit " are provided by controller to order
It enables, Fill valve is opened, and realizes oil circuit repairing.
Specific closed-loop drive, closed loop flow are adjusted, closed loop load load adjusting is 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, main control valve) basic performance test answered；HYDRAULIC CONTROL SYSTEM function and performance test.
(2) hydraulic test system realizes that the technical solution of all-hydraulic multiloop while operating condition of test is：Using " variable pump+
Load-sensitive ", " constant displacement pump+load-sensitive " control are, it can be achieved that all-hydraulic multiloop while operating condition of test, single loop experiment work
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 service life.When only needing a certain or a few branch circuits to test, the branch circuit for needing to test is opened,
All test loops need not be opened, realize energy-saving purpose.
" constant displacement pump+load-sensitive valve " realize hydraulic test loading system multimachine structure can work at the same time principle (such as Fig. 1,
Shown in Fig. 4)：Ioad-sensing control valve structure (mainly by electric-hydraulic proportion commutation main valve, electric proportional reversing valve, pressure-compensated valve,
The compositions such as shuttle valve) in shuttle valve the maximum pressure of load is passed to the constant difference overflow valve of quantitative pump discharge, to adjustment quantitative
The highest load pressure of pressure ratio for pumping output is slightly higher, to make multi-load work at the same time.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 spool, and F is the precompressed of spring
Power, therefore the outlet pressure pumped is higher by F/A than highest load pressure always.The speed of pressure-compensated valve proof load will not be because
The variation of the pressure and speed of another load and change.Realize that system energy consumption is low, precision is high, and can realize synchronize it is dynamic
The several hydraulic loaded executive components made are not interfere with each other during exercise.
(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 sensor) " closed-loop control.All-hydraulic circuit operating condition of test simultaneously can be achieved
Closed-loop drive, the closed-loop drive of single loop operating condition of test, single hydraulic element test operating mode closed-loop drive.
Be all made of on each experiment oil circuit " electric proportional reversing valve+electric-hydraulic proportion commutation main valve+speed probe (or position
Displacement sensor) " closed-loop drive controls by controller, and experiment branch oil circuit speed control principle is as shown in Figure 1：The horse that experiment branch oil circuit measures
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
Corresponding signal voltage value is calculated, thus the electric proportional reversing valve being defeated by control valve block controls electric-hydraulic proportion commutation valve core of main valve
Opening 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 difference be defeated by the control electric signal of electric proportional reversing valve as input signal to controller, make opening for spool
Open area increases, and so that electric-hydraulic proportion commutation valve core of main valve control hydraulic fluid flow rate is increased, acts on electric-hydraulic proportion commutation main valve valve
Core active force increases, and the opening area of valve core of main valve increases, and so that experiment oil circuit flow is increased, motor speed output increases；If real
Pressure measurement force value is higher than desired value, then the opening area of valve core of main valve reduces, and the reduction of experiment oil circuit flow, motor speed output is made to subtract
It is small.
(4) hydraulic test loading system realizes pressure closed loop flow-rate adjustment, realizes that the energy-efficient technical solution of hydraulic loaded is：
When the output flow of constant displacement pump is more than the working flow of system, system pressure will increase；Otherwise system pressure is pressed less than setting
Power.It is as shown in Figure 1 to load branch oil circuit pressure closed loop flow Principles of Regulation：The maximum pressure of load is passed to and is quantitatively pumped out by shuttle valve
The constant difference overflow valve of mouth, while the maximum pressure signal that pressure sensor measures is compared with given target pressure value, it 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
3 rotating speed of motor processed is realized by way of controlling 3 rotating speed of motor and is adjusted to load branch oil circuit closed loop flow.If observed pressure value
Less than desired value, then both difference exports as rotating speed control voltage signal to frequency converter as input signal to controller, makes electricity
3 raising speed of machine, flow system flow increase, and pressure rises；If observed pressure value is higher than desired value, 3 reduction of speed of motor, flow system flow subtracts
Small, pressure declines.
In summary：No matter total system simultaneously operating condition of test or one or several oil circuit operating condition of test, motor 3 turn
Speed can change with the variation of operating mode, realize pressure closed loop flow-rate adjustment, play the energy-saving effect of on-demand fuel feeding.
The rotating speed of motor 3 changes principle with the variation of load pressure：In hydraulic test loading system, constant displacement pump stream
It measures and is with the relationship of 3 rotating speed of motor
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：Formula (4.1), (4.2) are combined, be can be obtained by f-supply frequency, P-number of magnetic pole pairs
Q=60fq/p=kf (4.3)
K-proportionality coefficient in formula, k=60q/p, for each determination flow, by formula (4.3) can obtain one and
Corresponding frequency:
F=Q/k (4.4)
According to formula (4.4), so that it may the flow of each operation stage is converted to corresponding frequency, thus theoretically
Solves the problems, such as frequency determination.For constant displacement pump, flow is directly proportional to rotating speed, and shaft power and rotating speed cube at 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 it is cube directly proportional, motor speed reduces, and shaft power is greatly reduced.It can be seen that frequency conversion flow control
Fixture has fairly obvious energy-saving effect.
(5) hydraulic test loading system realizes that the technical solution of closed loop load Loading Control is：Load closed loop Loading Control
Principle by taking pump-motor experiment oil circuit load as an example as shown in Figure 1, introduce：Hydraulic test loading system operating mode and hydraulic test system
System Conditions Matching carries out closed loop load by preset loading curve system.The torque value size that torque, speed probe measure by
Unlatching (oil inlet) pressure of electric proportional pressure control valve determines in hydraulic test loading system, the unlatching (oil inlet of electric proportional pressure control valve
Mouthful) pressure determines by the preset loading curve of controller.The torque value of actual measurement is compared with preset torque value, and deviation is believed
Number controller is defeated by as input control signal, calculate the value of electrical signals to induction signal, be defeated by electric proportional pressure control valve to control
Its inlet pressure size；It is realized by preset loading curve system by way of controlling electric proportional pressure control valve inlet pressure
Carry out closed loop load.If surveying torque value is less than desired value, the two difference, to controller, exports as torque as input signal
Electric signal is controlled to electric proportional pressure control valve, increases electric proportional pressure control valve inlet pressure, the hydraulic loaded moment of resistance increases, experiment system
Torque value of uniting rises；If surveying torque value value is higher than desired value, electric proportional pressure control valve inlet pressure, hydraulic loaded resistance are reduced
Square reduces, and pilot system torque value reduces.
The principle that hydraulic test system torque value changes with the variation that hydraulic test loading system loads：
Enclosed or open type motor output torque value and the relationship of oil circuit pressure are in hydraulic test system：
In formula：T- motor reality output torques, ηmMotor mechanical efficiency, TLMotor theory output torque, V- motors row
Amount, p- motor operations pressure.
The equilibrium equation formula of spool：
In formula：F- proportion electro-magnet power outputs, d- diameters, the interior hydraulic coupling controlled of p- pilot valves valve chamber, the stream of C- valves
Coefficient of discharge, the displacement of x- spools,Poppet spool valve goes out Liu Jiao, FfThe kinetic friction force of the motion parts such as spool, 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 influences such as valve internal friction and valve flow, according to stress balance relationship, can obtain the pressure and control electricity of valve
Relationship 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., the quadratic power of valve pressure output control and input control electric current is at just
Than.The influence of the factors such as negligible friction then can be derived that valve input control size of current determines that its pressure output control is big
It is small.
According to formula (5.1~5.5), so that it may the torque of each operation stage is converted to corresponding electric current, thus from
Theoretically solves the problems, such as electric current determination.For motor, torque is directly proportional to current squaring, pressure and current squaring at
Direct ratio, i.e.,:
P∝I2, T ∝ I2 (5.6)
Similarly, the thrust of oil cylinder and the relationship 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 flat with electric current
Side is directly proportional, i.e.,：
P∝I2, F ∝ I2。
The invention is not limited in specific implementation modes above-mentioned.The present invention, which expands to, any in the present specification 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
Field technology personnel are altered or modified in the unsubstantiality that the spirit for not departing from the present invention is done, should belong to power of the present invention
The claimed range 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 experiment oil circuit and enclosed experiment oil circuit, open type experiment oil circuit include motor,
Open type variable pump, filter, test load sensitivity control valve group 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 valve block entrance that controls is connect 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
Branch oil circuit is tested in road to form multichannel open type；Enclosed experiment oil circuit include motor, enclosed variable pump and enclosed motor according to
It is secondary to be formed by connecting, it forms enclosed and tests oil circuit；
The hydraulic test loading system includes frequency converter, motor, constant displacement pump, filter, offered load sensitivity control valve group, bridge
Formula combination valve and loading element are connected in sequence, and the offered load sensitivity control valve group includes multiple control valves arranged side by side
Piece, each valve block entrance that controls are connect 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 loads branch oil circuit to form multichannel；
Each experiment oil circuit connection corresponding with each loading oil circuit, i.e. enclosed motor, test element are a pair of with loading element one respectively
It should connect, torque rotary speed sensor is provided between enclosed motor and loading element, is arranged between test element and loading element
There is sensor；
The control valve block includes that pressure-compensated valve, electric-hydraulic proportion commutation main valve, 2 electric proportional reversing valves and shuttle valve, pressure are mended
Repay valve inlet connect with filter, its outlet with electric-hydraulic proportion commutate main valve inlet connect；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
It is connected with corresponding loading element；Shuttle valve left end is connect with pressure-compensated valve and electric-hydraulic proportion commutation main valve respectively, and right end is under
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
The left end of valve is connected with right end, electric proportional reversing valve right end entrance and control oil circuit connection；
In the hydraulic test system, the shuttle valve is connect with open type variable pump；
In hydraulic test loading system, electric proportional pressure control valve, the constant displacement pump and load are connected on the bridge-type combination valve
Be provided with overflow oil circuit between Ioad-sensing control valve group, the oil overflow road is provided with constant difference overflow valve, the shuttle valve with
Constant difference overflow valve connects, and pressure sensor is provided between shuttle valve and constant difference overflow valve, 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 load motor, load pump or load cylinder；Wherein, open type motor with load motor or add
It carries pump to be correspondingly connected with, oil cylinder is correspondingly connected with load cylinder.
3. a kind of multifunctional solution compression testing device according to claim 2, it is characterised in that：Open type motor and load motor
Or load pump, when being correspondingly connected with, the sensor is torque rotary speed sensor；When oil cylinder is correspondingly connected with load cylinder, the sensing
Device is power displacement sensor.
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：Hydraulic test load system
System further 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 connects.
6. a kind of multifunctional solution compression testing device according to claim 1, it is characterised in that：It further include oil return cooling system
System, the oil return cooling system includes that filter, cooler and fuel tank are connected in sequence；The test element, loading element
It is connect with filter by pipeline with constant difference overflow valve, the electricity proportional pressure control valve is connect by pipeline with fuel tank；The oil return
Cooling system further include motor, open type variable pump, pressure sensor, motor for cooling fan by pipeline be connected in sequence return
Oily cooling oil path, motor, pressure sensor are electrically connected with the controller, and motor for cooling fan is connect by pipeline with fuel tank, open type
Variable pump inlet is connect with fuel tank, and open type variable pump pumps out the oil return in fuel tank, after motor for cooling fan carries out cooling
Send fuel tank back to again；The enclosed variable pump, open type variable pump and constant displacement pump are connect 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 the open type tests 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 tests oil circuit, valve block is respectively controlled
Flowmeter and pressure sensor are respectively disposed between test element；Filter outlet connects in the loading system
It is connected to flowmeter, constant difference overflow valve outlet is connected with flowmeter；The electricity proportional pressure control valve inlet and bridge-type combine valve inlet
Place is both provided with pressure sensor；And torque rotary speed sensor, pressure sensor and flowmeter are electrically connected with the controller.
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| CN107762995B (en) * | 2017-09-13 | 2023-12-22 | 江苏恒立液压科技有限公司 | Novel electric proportion overflow device |
| CN108035944B (en) * | 2017-12-22 | 2023-06-02 | 山东大学 | Variable-frequency hydraulic control loading system and method |
| CN108760321B (en) * | 2018-05-23 | 2024-01-02 | 杭州良丰动力设备有限公司 | Engine power loading test system |
| CN108730269A (en) * | 2018-08-29 | 2018-11-02 | 新疆农业大学 | Automatically controlled open and close type hydraulic test bench |
| CN109443823A (en) * | 2018-12-25 | 2019-03-08 | 上海电气液压气动有限公司 | A kind of depth tunnel domain experimental rig |
| CN109798283A (en) * | 2019-01-21 | 2019-05-24 | 江苏大学 | One kind remotely controlling more relay protective scheme function central pumping stations |
| CN112213958B (en) * | 2020-10-24 | 2022-12-02 | 济宁学院 | Electro-hydraulic control comprehensive simulation test platform |
| CN112412910B (en) * | 2020-11-06 | 2024-06-14 | 中色科技股份有限公司 | Hydraulic loading servo control system and control method for output shaft of speed reducer |
| CN112594178A (en) * | 2020-12-29 | 2021-04-02 | 中铁工程装备集团有限公司 | Comprehensive test system for hydraulic pump |
| CN113107917B (en) * | 2021-04-09 | 2023-05-23 | 三一重机有限公司 | Electrohydraulic control method and device and working machine |
| CN113532895A (en) * | 2021-06-26 | 2021-10-22 | 中国煤炭科工集团太原研究院有限公司 | Dynamic loading test bench for mining hydraulic control execution subsystem |
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| CN203809417U (en) * | 2014-03-14 | 2014-09-03 | 上海电气液压气动有限公司 | Multifunctional hydraulic test device |
| CN203784021U (en) * | 2014-04-28 | 2014-08-20 | 泸州沱江液压件有限公司 | Multifunctional comprehensive hydraulic experiment device |
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