CN107655698A - A kind of hydraulic power unit for the experiment of explosion-proof wet brake - Google Patents
A kind of hydraulic power unit for the experiment of explosion-proof wet brake Download PDFInfo
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- CN107655698A CN107655698A CN201710759690.2A CN201710759690A CN107655698A CN 107655698 A CN107655698 A CN 107655698A CN 201710759690 A CN201710759690 A CN 201710759690A CN 107655698 A CN107655698 A CN 107655698A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The present invention relates to anti-explosion diesel engine vehicle technical field, specially a kind of hydraulic power unit for the experiment of explosion-proof wet brake, solve the problems, such as that anti-explosion diesel engine vehicle can not carry out effective checking to the performance of wet brake before installation and cause its easily failure or even initiation accident in use, include the motor and oil pump of shaft coupling connection, also include low pressure chamber pressure dwelling loop, load cylinder loop, parking braking releases loop, high pressure chest pressure dwelling loop and retardation test loop, the oil inlet of oil pump is connected with hydraulic oil container, the oil-out of oil pump is connected with unloading valve, motor drives oil pump to provide hydraulic oil to each loop by shaft coupling, the hydraulic oil of oil pump output simultaneously flows to accumulator by high pressure filter.A variety of key performances that the present invention realizes wet brake by multiple test loops are tested, while realize the detection of wet brake multiple performance parameter, improve the efficiency of brake experiment.
Description
Technical field
The present invention relates to anti-explosion diesel engine vehicle technical field, specially a kind of liquid for the experiment of explosion-proof wet brake
Press pump station.
Background technology
It is mining due to operating condition of the underground coal mine work with the special more water of the more mud of requirement of explosion proof and underworkings
Vehicle employs the wet brake of closing mostly.At present because market uses the negligible amounts of wet brake vehicle, wet type
Brake producer not yet forms scale, therefore does not have perfect inspection equipment before dispatching from the factory, and is only imitated by the use after user's entrucking
Fruit judges the quality of brake, so that brake often occur occurs as soon as oil leak once entrucking, adds the work of repetition dismounting
Amount；Simultaneously as the braking ability test detection means for the wet brake not being molded so as to wet braking before installation
The performance of device lacks effective checking, can not reduce the oil leakage fault during use, cause in actual use, wet type system
Easily there is oil leak in dynamic device, loses the failures such as coolant carrier, even results in brake(-holder) block sintering until failure, serious can also cause
Security incident.
The content of the invention
The present invention can not carry out effect before installation in order to solve anti-explosion diesel engine vehicle to the performance of wet brake
The problem of card causes it easily to break down in use or even trigger accident, there is provided one kind is used for explosion-proof wet brake
The hydraulic power unit of experiment.
The present invention is achieved through the following technical solutions：A kind of hydraulic power unit for the experiment of explosion-proof wet brake,
Include the motor and oil pump of shaft coupling connection, in addition to low pressure chamber pressure dwelling loop, load cylinder loop, parking braking releasing
Loop, high pressure chest pressure dwelling loop and retardation test loop, the oil inlet of oil pump are connected with hydraulic oil container, the oil-out connection of oil pump
There is unloading valve, motor drives oil pump to provide hydraulic oil, while the hydraulic oil warp of oil pump output to each loop by shaft coupling
Cross high pressure filter and flow to accumulator；
Low pressure chamber pressure dwelling loop is the cooling loop of wet brake friction plate, including pressure-reducing valve III, two solenoid directional control valves
IV, Solenoid ball valve II and pressure sensor VI, pressure-reducing valve III P mouths are connected with the oil-out of accumulator, pressure-reducing valve III A
Mouth communicates with two solenoid directional control valve IV P mouths, and two solenoid directional control valve IV T mouths are connected with the oil-feed of return filter
Mouthful, two solenoid directional control valve IV A mouths are connected with Solenoid ball valve II A mouths, and Solenoid ball valve II B mouths are connected with pressure sensing
Device VI；
Load cylinder loop includes electric proportional pressure-reducing valve II, pressure sensor V and three-position electromagnetic reversal valve, electric proportional pressure-reducing valve II
P mouths be connected with the oil-out of accumulator, be connected with pressure sensor V at electric proportional pressure-reducing valve II A mouths while be connected to three
The P mouths of position solenoid directional control valve, electric proportional pressure-reducing valve II T mouths are connected with the T mouths of three-position electromagnetic reversal valve and are connected with oil return
The oil inlet of filter, A, B mouth of three-position electromagnetic reversal valve are connected to quick connector；
Parking braking, which releases loop, includes pressure-reducing valve II, two solenoid directional control valve III and pressure sensor IV, pressure-reducing valve II P
Mouth is connected with the oil-out of accumulator, and pressure-reducing valve II A mouths are connected with two solenoid directional control valve III P mouths, two electromagnetism
Reversal valve III T mouths are connected with the oil inlet of return filter, and pressure biography is connected with two solenoid directional control valve III A mouths
Sensor IV；
High pressure chest pressure dwelling loop includes pressure-reducing valve I, two solenoid directional control valve II, Solenoid ball valve I and pressure sensor III, decompression
Valve I P mouths are connected with the oil-out of accumulator, and pressure-reducing valve I A mouths communicate with two solenoid directional control valve II P mouths, two electricity
Magnetic reversal valve II T mouths connect with the oil inlet of return filter, two solenoid directional control valve II A mouths and Solenoid ball valve I A mouths
It is connected, Solenoid ball valve I B mouths are connected with pressure sensor III；
Retardation test loop includes electric proportional pressure-reducing valve I, two solenoid directional control valve I and pressure sensor II, electric proportional pressure-reducing valve I
P mouths be connected with the oil-out of accumulator, electric proportional pressure-reducing valve I A mouths are connected with two solenoid directional control valve I P mouths, electricity
Proportional pressure-reducing valve I T mouths are connected with two solenoid directional control valve I T mouths and are connected with the oil inlet of return filter, two electricity
Pressure sensor II is connected with magnetic reversal valve I A mouths.
The hydraulic oil of oil pump output is flowed in accumulator after high pressure filter filters, and high pressure filter can prevent oil
Particulate matter in case enters in system.When the pressure value of the hydraulic oil in accumulator reaches the setting value of unloading valve, oil pump goes out
The hydraulic oil of mouth passes through unloading valve off-load, fuel tank is back to, when needing pressure oil in system, by the high pressure stored in accumulator
Oil provides oil mass to system, and only when the pressure oil in accumulator is reduced to a certain extent, unloading valve is re-closing off, and oil pump is to storage
Makeup oil liquid can be continued in device so that oil pump is operated in less pressure environment in most cases, greatly reduces energy consumption.
Low pressure chamber refers to the cavity where the friction plate of wet brake, and it is internal to be full of hydraulic oil, main function be by
Caused heat is taken away in braking procedure, and the inside cavity does not have pressure under normal circumstances, and pressure can be appropriate after oil temperature rises
Increase, to ensure that seal can bear certain pressure without producing leakage, it is therefore necessary to carry out the pressurize experiment of low pressure chamber；
Load cylinder loop, be by oil cylinder loading can with the radial load during simulating brake device loading operation, oil cylinder working-pressure can
Adjusted with continuously linear, due to cylinder force and pressure positive correlation, it is achieved thereby that the consecutive variations of radial loaded power；Part
Wet brake employs parking braking and the mode of braking of service brake one, therefore before the test, to pass through parking braking
Loop is released to release parking braking；High pressure chest is brake piston chamber, is the cavity of service brake pressure effect, if the cavity
Leak, may result in service brake failure, therefore to carry out high pressure chest pressurize；Retardation test loop refers to that brake is trying
After testing the speed for being operated on stand and reaching certain, implement the loop of braking to brake.
Hydraulic oil container is provided with liquid level gauge, and hydraulic oil container top is provided with air cleaner.The liquid stored in hydraulic oil container
Force feed as the oil sources of oil pump, can be also equipped with the liquid level of liquid level gauge real-time display hydraulic oil container on fuel tank, and liquid level is reduced to
When below liquid level gauge, hydraulic oil should be supplemented in time into fuel tank.Air cleaner is also equipped with above hydraulic oil container, can conduct
The air-vent of hydraulic oil container, while when supplementing hydraulic oil into hydraulic oil container, can also play a role in filtering.
One kind is used for explosion-proof wet brake experiment hydraulic power unit, and its test method includes low pressure chamber pressurize experiment side
Method, high pressure chest pressurize test method and retardation test method.
Low pressure chamber pressurize test method includes：Before experiment, by low pressure chamber in the case of two solenoid directional control valve IV dead electricity
The design of pressure of pressure-reducing valve III in pressure dwelling loop is 0.2Mpa；During experiment, the low pressure chamber of brake is passed through into quick connector
It is connected in the low pressure chamber pressure dwelling loop of pumping plant；Start motor, it is ensured that Solenoid ball valve II dead electricity, control two electromagnetic switch
Valve IV obtains electric, and when the pressure value that pressure sensor VI is detected is more than 0.2Mpa, control Solenoid ball valve II obtains electric, while two electricity
Magnetic reversal valve IV dead electricity, start low pressure chamber pressurize experiment, pressurize 5min；If the pressure value that pressure sensor VI is detected is all the time
More than 0.2Mpa, then test successfully, control Solenoid ball valve II dead electricity, carry out low pressure chamber pressure release.
High pressure chest pressurize test method includes：Before experiment, by low pressure chamber pressurize in the case of solenoid directional control valve II dead electricity
The design of pressure of pressure-reducing valve I in loop is 8Mpa；During experiment, the high pressure chest that the high pressure chest of brake is connected to pumping plant is protected
Push back in road；Start motor, it is ensured that Solenoid ball valve I dead electricity, control two solenoid directional control valve II to obtain electric, work as pressure sensor
When the pressure value that III is detected is more than 8Mpa, Solenoid ball valve I is controlled to obtain electric, while two solenoid directional control valve II dead electricity, start high
Press chamber pressurize experiment, pressurize 5min；If the pressure value that pressure sensor detects is consistently greater than 8Mpa, test successfully, control
Solenoid ball valve I dead electricity processed, carry out high pressure chest pressure release.
Before experiment, confirm that electric proportional pressure-reducing valve I is in power failure state, while pressure sensor II pressure value is zero；It is logical
Overtesting platform drives brake to accelerate to setting speed；Control two solenoid directional control valve I to obtain electric, control electric proportional pressure-reducing valve I moulds
Intend brake pedal output pressure value and complete braking；The performance of brake ginseng is analyzed using the numerical value of every sensor of record
Number.
Before retardation test, the radial load that the load-carrying of loop analog difference acts on Lower brake, loading need to be loaded by oil cylinder
When, need to obtain the loading electromagnet of three-position electromagnetic reversal valve electric, and required loading force is inputted in host computer, can by conversion
To obtain the output pressure needed for electric proportional pressure-reducing valve II, electric proportional pressure-reducing valve II pressure value can continuously adjust；Pressure passes
Sensor V is used for detecting the output pressure value for loading electric proportional pressure-reducing valve II, feeds back in host computer, realizes the closed loop of output pressure
Radial loaded power is constant during control and experiment.
Retardation test method includes：When carrying out retardation test, parking braking need to be first released, by controlling two electromagnetic switch
Valve II obtains electric, the pressure of pressure sensor IV display releasing parking brakings, will solution parking braking pressure by adjusting pressure-reducing valve II
Adjust to rational scope.
The present invention is a kind of corollary equipment of the testing stand for wet brake Test And Checkout, contains multiple experiments
Loop, in that context it may be convenient to realize a variety of key performances experiment of wet brake, the hydraulic power unit can realize wet braking simultaneously
The detection of device multiple performance parameter, the efficiency of brake experiment is improved, further, the hydraulic power unit realizes oneself of height
Dynamicization controls, the actual braking procedure of the good simulating brake device of energy, to shortening the R＆D cycle of wet brake and improving production
Moral character can be significant, has filled up the blank in the domestic and international field.
Brief description of the drawings
Fig. 1 is the schematic diagram of the present invention；
Fig. 2 is low pressure chamber pressure dwelling loop schematic diagram of the present invention；
Fig. 3 is load cylinder circuit theory figure of the present invention；
Fig. 4 is that parking braking of the present invention releases circuit theory figure；
Fig. 5 is high pressure chest pressure dwelling loop schematic diagram of the present invention；
Fig. 6 is retardation test circuit theory figure of the present invention.
In figure：S1- low pressure chamber pressure dwelling loops, S2- load cylinders loop, S3- parking brakings release loop, S4- high pressure chests
Pressure dwelling loop, S5- retardation tests loop, 1- hydraulic oil containers, 2- motors, 3- shaft couplings, 4- oil pumps, 5- liquid level gauges, 6- are empty
Air cleaner, 7- return filters, 8- unloading valves, 9- accumulators, 10-1- electricity proportional pressure-reducing valve I, 10-2- electricity proportional pressure-reducing valves
Two solenoid directional control valve III, 11-4- two of II, 11-1- two solenoid directional control valve I, 11-2- two solenoid directional control valve II, 11-3-
Position solenoid directional control valve IV, 12-1- pressure sensor I, 12-2- pressure sensor II, 12-3- pressure sensor III, 12-4- pressure
Force snesor IV, 12-5- pressure sensor V, 12-6- pressure sensor VI, 13-1- pressure-reducing valve I, 13-2- pressure-reducing valve II, 13-
3- pressure-reducing valves III, 14-1- Solenoid ball valve I, 14-2- Solenoid ball valve II, 15- quick connector, 16- three-position electromagnetic reversal valves, 17-
High pressure filter.
Embodiment
1~Fig. 6 of reference picture is further elaborated to the present invention, a kind of hydraulic pump for the experiment of explosion-proof wet brake
Stand, include the motor 2 and oil pump 4 of the connection of shaft coupling 3, the hydraulic oil stored in hydraulic oil container 1 can be as the oil of oil pump 4
Source, is also equipped with liquid level gauge 5 on hydraulic oil container 1, the liquid level of real-time display hydraulic oil container 1, when liquid level is reduced to below liquid level gauge,
Hydraulic oil should be supplemented into hydraulic oil container 1 in time.Air cleaner 6 is also equipped with the top of hydraulic oil container 1, as hydraulic oil container
Air-vent, while into hydraulic oil container supplement hydraulic oil when, can also play a role in filtering；Motor 2 passes through shaft coupling
Device 3 drives oil pump 4 to provide hydraulic oil into system.
Further, the hydraulic oil that oil pump 4 exports is flowed in accumulator 9 after the filtering of high pressure filter 17, and height presses through
Filter 17 can prevent the particulate matter in hydraulic oil container 1 from entering in system.Unloaded when the pressure value of the hydraulic oil in accumulator 9 reaches
During the setting value of lotus valve 8, the hydraulic oil pumped out from oil pump 4 passes through the off-load of unloading valve 8, is back to hydraulic oil container 1, when being needed in system
When wanting pressure oil, the hydraulic oil stored from accumulator 9 provides oil mass to system, only when the pressure oil in accumulator 9 reduces
To a certain degree, unloading valve 8 is re-closing off, and oil pump 4 continues makeup oil liquid into accumulator 9, and such oil pump 4 is in most cases
Only it is operated under the pressure of very little, reduces energy consumption.
Also include low pressure chamber pressure dwelling loop S1, load cylinder loop S2, parking braking releasing loop in hydraulic power unit system
S3, high pressure chest pressure dwelling loop S4 and retardation test loop S5, the oil inlet of oil pump 4 are connected with hydraulic oil container 1, oil pump 4 it is fuel-displaced
Mouth is connected with unloading valve 8, and motor 2 drives oil pump 4 to provide hydraulic oil to each loop by shaft coupling 3, while oil pump 4 exports
Hydraulic oil flow to accumulator 9 by high pressure filter 17.
Low pressure chamber pressure dwelling loop S1 be wet brake friction plate cooling loop, including pressure-reducing valve III 13-3, two
Solenoid directional control valve IV11-4, Solenoid ball valve II 14-2 and pressure sensor VI 12-6, pressure-reducing valve III 13-3 P mouths and accumulation of energy
The oil-out of device 9 is connected, and pressure-reducing valve III 13-3 A mouths communicate with two solenoid directional control valve IV 11-4 P mouths, two electricity
Magnetic reversal valve IV 11-4 T mouths are connected with the oil inlet of return filter 7, two solenoid directional control valve IV 11-4 A mouths and electricity
Magnetic ball valve II14-2 A mouths are connected, and Solenoid ball valve II14-2 B mouths are connected with pressure sensor VI12-6.
Before low pressure chamber pressurize experiment, by low pressure chamber pressure dwelling loop in the case of two solenoid directional control valve IV11-4 dead electricity
Pressure-reducing valve III13-3 design of pressure be 0.2Mpa, when pressurize is tested, the low pressure chamber of brake is passed through into quick connector 15
It is connected in the low pressure chamber pressure dwelling loop of pumping plant.Start motor 2, it is ensured that Solenoid ball valve II14-2 dead electricity, control two electricity
Magnetic reversal valve IV11-4 obtain it is electric, when the pressure value that pressure sensor VI12-6 is detected is more than 0.2Mpa, control Solenoid ball valve
II14-2 obtains electric, while two solenoid directional control valve IV 11-4 dead electricity, starts low pressure chamber pressurize experiment, pressurize 5min, if pressure
The pressure value that sensor VI12-6 is detected is consistently greater than 0.2Mpa, then tests successfully, controls Solenoid ball valve II14-2 dead electricity, enters
Row low pressure chamber pressure release.
Load cylinder loop S2 includes electric proportional pressure-reducing valve II10-2, pressure sensor V12-5 and three-position electromagnetic reversal valve
16, electric proportional pressure-reducing valve II10-2 P mouths are connected with the oil-out of accumulator 9, connect at electric proportional pressure-reducing valve II10-2 A mouths
It is connected to pressure sensor V12-5 while is connected to the P mouths of three-position electromagnetic reversal valve 16, electric proportional pressure-reducing valve II10-2 T mouths and three
The T mouths of position solenoid directional control valve 16 are connected and are connected with the oil inlet of return filter 7, A, B mouth of three-position electromagnetic reversal valve 16
It is connected to quick connector 15.
Before retardation test, the radial load that loop analog difference load-carrying acts on Lower brake need to be loaded by oil cylinder, during loading
The loading electromagnet of three-position electromagnetic reversal valve 16 need to be obtained electric, required loading force is inputted in host computer, can by conversion
To obtain the output pressure needed for electric proportional pressure-reducing valve II10-2, electric proportional pressure-reducing valve II10-2 pressure value can be adjusted continuously
Section, so as to ensure that the consecutive variations of radial loaded power.Pressure sensor V12-5 is used for detecting the electric proportional pressure-reducing valve of loading
II10-2 output pressure value, feeds back in host computer, it is possible to the closed-loop control of output pressure is realized, so as to guarantee test mistake
Radial direction loading force is constant in journey.
Parking braking, which releases loop S3, includes pressure-reducing valve II13-2, two solenoid directional control valve III11-3 and pressure sensor
IV12-4, pressure-reducing valve II13-2 P mouths are connected with the oil-out of accumulator 9, and pressure-reducing valve II13-2 A mouths change with two electromagnetism
It is connected to valve III11-3 P mouths, two solenoid directional control valve III11-3 T mouths are connected with the oil inlet of return filter 7,
Pressure sensor IV12-4 is connected with two solenoid directional control valve III11-3 A mouths.
When carrying out retardation test, parking braking need to be first released, two solenoid directional control valve II 11-3 of control obtain electric, pressure biography
Sensor IV12-4 display release parking braking pressure, by adjusting pressure-reducing valve II13-2, will solution parking braking pressure adjust to
Rational scope, it is only necessary to debugged when testing for the first time.
High pressure chest pressure dwelling loop S4 include pressure-reducing valve I13-1, two solenoid directional control valve II11-2, Solenoid ball valve I14-1 and
Pressure sensor III12-3, pressure-reducing valve I13-1 P mouths are connected with the oil-out of accumulator 9, pressure-reducing valve I13-1 A mouths with
Two solenoid directional control valve II11-2 P mouths communicate, two solenoid directional control valve II11-2 T mouths and the oil inlet of return filter 7
Connection, two solenoid directional control valve II11-2 A mouths are connected with Solenoid ball valve I14-1 A mouths, and Solenoid ball valve I14-1 B mouths connect
It is connected to pressure sensor III12-3.
Before high pressure chest pressurize experiment, by subtracting in low pressure chamber pressure dwelling loop in the case of solenoid directional control valve II11-2 dead electricity
Pressure valve I13-1 design of pressure is 8Mpa, and when pressurize is tested, the high pressure chest of brake is connected to the high pressure chest pressurize of pumping plant
In loop.Start motor 2, it is ensured that Solenoid ball valve I14-1 dead electricity, control two solenoid directional control valve II11-2 to obtain electric, work as pressure
When the pressure value that force snesor III12-3 is detected is more than 8Mpa, Solenoid ball valve I14-1 is controlled to obtain electric, while two electromagnetism change
To valve II 11-2 dead electricity, start high pressure chest pressurize experiment, pressurize 5min, if the pressure value that pressure sensor detects is all the time
More than 8Mpa, then test successfully, control Solenoid ball valve I14-1 dead electricity, carry out high pressure chest pressure release.
Retardation test loop S5 includes electric proportional pressure-reducing valve I10-1, two solenoid directional control valve I11-1 and pressure sensor II
12-2, electric proportional pressure-reducing valve I10-1 P mouths are connected with the oil-out of accumulator 9, electric proportional pressure-reducing valve I10-1 A mouths and two
Position solenoid directional control valve I11-1 P mouths are connected, electric proportional pressure-reducing valve I10-1 T mouths and two solenoid directional control valve I 11-1 T
Mouth is connected and is connected with the oil inlet of return filter 7, and pressure sensing is connected with two solenoid directional control valve I 11-1 A mouths
Device II12-2.
Confirm that electric proportional pressure-reducing valve I 10-1 are in power failure state, while pressure sensor II 12-2 pressure before experiment
Value is zero.After confirmation, after driving brake to accelerate to setting speed by testing stand, it is possible to carry out retardation test, control two
Position solenoid directional control valve I 11-1 obtain electric, control electric proportional pressure-reducing valve I 10-1 simulating brakes pedal output pressure value, it is possible to complete
Into braking, to record the numerical value of every sensor, the final performance parameter for analyzing brake.
After off-test, off-load operation need to be carried out.The loading electromagnet dead electricity of control three-position electromagnetic reversal valve 16, unload it is charged
Magnet obtains electric, after load cylinder is withdrawn completely, further controls the off-load electromagnet dead electricity of three-position electromagnetic reversal valve 16, control
Electric proportional pressure-reducing valve I 10-1 and electric proportional pressure-reducing valve II 10-2 dead electricity, while control two solenoid directional control valve I 11-1 and two
Position solenoid directional control valve III 11-3 dead electricity.
Claims (8)
1. a kind of hydraulic power unit for the experiment of explosion-proof wet brake, including shaft coupling（3）The motor of connection（2）And oil
Pump（4）, it is characterised in that also including low pressure chamber pressure dwelling loop（S1）, load cylinder loop（S2）, parking braking release loop
（S3）, high pressure chest pressure dwelling loop（S4）And retardation test loop（S5）, oil pump（4）Oil inlet be connected with hydraulic oil container（1）, oil
Pump（4）Oil-out be connected with unloading valve（8）, motor（2）Pass through shaft coupling（3）Drive oil pump（4）There is provided to each loop
Hydraulic oil, while oil pump（4）The hydraulic oil of output passes through high pressure filter（17）Flow to accumulator（9）；
Low pressure chamber pressure dwelling loop（S1）For the cooling loop of wet brake friction plate, including pressure-reducing valve III（13-3）, two electricity
Magnetic reversal valve IV（11-4）, Solenoid ball valve II（14-2）With pressure sensor VI（12-6）, pressure-reducing valve III（13-3）P mouths with
Accumulator（9）Oil-out be connected, pressure-reducing valve III（13-3）A mouths and two solenoid directional control valve IV（11-4）P mouth phases
It is logical, two solenoid directional control valve IV（11-4）T mouths be connected with return filter（7）Oil inlet, two solenoid directional control valve IV
（11-4）A mouths and Solenoid ball valve II（14-2）A mouths be connected, Solenoid ball valve II（14-2）B mouths be connected with pressure sensor
VI （12-6）；
Load cylinder loop（S2）Including electric proportional pressure-reducing valve II（10-2）, pressure sensor V（12-5）Commutated with three-position electromagnetic
Valve（16）, electric proportional pressure-reducing valve II（10-2）P mouths and accumulator（9）Oil-out be connected, electric proportional pressure-reducing valve II（10-
2）A mouths at be connected with pressure sensor V（12-5）It is connected to three-position electromagnetic reversal valve simultaneously（16）P mouths, electric proportional pressure-reducing valve
II（10-2）T mouths and three-position electromagnetic reversal valve（16）T mouths be connected and be connected with return filter（7）Oil inlet, three
Position solenoid directional control valve（16）A, B mouth be connected to quick connector（15）；
Parking braking releases loop（S3）Including pressure-reducing valve II（13-2）, two solenoid directional control valve III（11-3）And pressure sensing
Device IV（12-4）, pressure-reducing valve II（13-2）P mouths and accumulator（9）Oil-out be connected, pressure-reducing valve II（13-2）A mouths with
Two solenoid directional control valve III（11-3）P mouths be connected, two solenoid directional control valve III（11-3）T mouths and return filter
（7）Oil inlet be connected, two solenoid directional control valve III（11-3）A mouths at be connected with pressure sensor IV（12-4）；
High pressure chest pressure dwelling loop（S4）Including pressure-reducing valve I（13-1）, two solenoid directional control valve II（11-2）, Solenoid ball valve I（14-
1）With pressure sensor III（12-3）, pressure-reducing valve I（13-1）P mouths and accumulator（9）Oil-out be connected, pressure-reducing valve I
（13-1）A mouths and two solenoid directional control valve II（11-2）P mouths communicate, two solenoid directional control valve II（11-2）T mouths with return
Oil strainer（7）Oil inlet connection, two solenoid directional control valve II（11-2）A mouths and Solenoid ball valve I（14-1）A mouths be connected
It is logical, Solenoid ball valve I（14-1）B mouths be connected with pressure sensor III（12-3）；
Retardation test loop（S5）Including electric proportional pressure-reducing valve I（10-1）, two solenoid directional control valve I（11-1）And pressure sensor
II（12-2）, electric proportional pressure-reducing valve I（10-1）P mouths and accumulator（9）Oil-out be connected, electric proportional pressure-reducing valve I（10-
1）A mouths and two solenoid directional control valve I（11-1）P mouths be connected, electric proportional pressure-reducing valve I（10-1）T mouths and two electromagnetism
Reversal valve I（11-1）T mouths be connected and be connected with return filter（7）Oil inlet, two solenoid directional control valve I（11-1）'s
Pressure sensor II is connected with A mouths（12-2）.
A kind of 2. hydraulic power unit for the experiment of explosion-proof wet brake according to claim 1, it is characterised in that liquid
Press oil case（1）It is provided with liquid level gauge（5）, hydraulic oil container（1）Top is provided with air cleaner（6）.
3. one kind is used for explosion-proof wet brake experiment hydraulic power unit, it is characterised in that the test method of hydraulic power unit includes
Low pressure chamber pressurize test method, high pressure chest pressurize test method and retardation test method.
4. one kind according to claim 3 is used for explosion-proof wet brake experiment hydraulic power unit, it is characterised in that low pressure
Chamber pressurize test method includes：Before experiment, in two solenoid directional control valve IV（11-4）Low pressure chamber pressurize is returned in the case of dead electricity
Pressure-reducing valve III in road（13-3）Design of pressure be 0.2Mpa；During experiment, the low pressure chamber of brake is passed through into quick connector
（15）It is connected in the low pressure chamber pressure dwelling loop of pumping plant；Start motor（2）, it is ensured that Solenoid ball valve II（14-2）Dead electricity, control
Make two solenoid directional control valve IV（11-4）Obtain electric, pressure sensor VI（12-6）When the pressure value detected is more than 0.2Mpa, control
Solenoid ball valve II processed（14-2）Must be electric, while two solenoid directional control valve IV（11-4）Dead electricity, start low pressure chamber pressurize experiment, pressurize
5min；If pressure sensor VI（12-6）The pressure value detected is consistently greater than 0.2Mpa, then tests successfully, controls electromagnetic ball
Valve II（14-2）Dead electricity, carry out low pressure chamber pressure release.
5. one kind according to claim 3 is used for explosion-proof wet brake experiment hydraulic power unit, it is characterised in that high pressure
Chamber pressurize test method includes：Before experiment, in solenoid directional control valve II（11-2）By in low pressure chamber pressure dwelling loop in the case of dead electricity
Pressure-reducing valve I（13-1）Design of pressure be 8Mpa；During experiment, the high pressure chest that the high pressure chest of brake is connected to pumping plant is protected
Push back in road；Start motor（2）, it is ensured that Solenoid ball valve I（14-1）Dead electricity, control two solenoid directional control valve II（11-2）
Electricity, as pressure sensor III（12-3）When the pressure value detected is more than 8Mpa, Solenoid ball valve I is controlled（14-1）Must be electric, simultaneously
Two solenoid directional control valve II（11-2）Dead electricity, start high pressure chest pressurize experiment, pressurize 5min；What if pressure sensor detected
Pressure value is consistently greater than 8Mpa, then tests successfully, control Solenoid ball valve I（14-1）Dead electricity, carry out high pressure chest pressure release.
6. one kind according to claim 3 is used for explosion-proof wet brake experiment hydraulic power unit, it is characterised in that braking
Test method includes：Before experiment, electric proportional pressure-reducing valve I is confirmed（10-1）In power failure state, while pressure sensor II（12-
2）Pressure value be zero；Brake is driven to accelerate to setting speed by testing stand；Control two solenoid directional control valve I（11-1）
Must be electric, control electric proportional pressure-reducing valve I（10-1）Simulating brake pedal output pressure value completes braking；Sensed using the items of record
The numerical value of device analyzes the performance parameter of brake.
7. one kind according to claim 3 or 6 is used for explosion-proof wet brake experiment hydraulic power unit, it is characterised in that
Before retardation test, the radial load that loop analog difference load-carrying acts on Lower brake need to be loaded by oil cylinder, need to be by three during loading
Position solenoid directional control valve（16）Loading electromagnet obtain electric, required loading force is inputted in host computer, can obtains by converting
To electric proportional pressure-reducing valve II（10-2）Required output pressure, electric proportional pressure-reducing valve II（10-2）Pressure value can continuously adjust
Section；Pressure sensor V（12-5）For detecting the electric proportional pressure-reducing valve II of loading（10-2）Output pressure value, feed back to host computer
In, realize the constant of radial loaded power during the closed-loop control and experiment of output pressure.
8. one kind according to claim 3 or 6 is used for explosion-proof wet brake experiment hydraulic power unit, it is characterised in that
When carrying out retardation test, parking braking need to be first released, by controlling two solenoid directional control valve II（11-3）Obtain electric, pressure sensor
IV（12-4）Display releases the pressure of parking braking, by adjusting pressure-reducing valve II（13-2）, will solution parking braking pressure adjust to
Rational scope.
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| CN112304497A (en) * | 2020-10-22 | 2021-02-02 | 吉林大学 | Inertia test stand for wet brake of mine car |
| 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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| CN107655698B (en) | 2020-06-23 |
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