CN107478531A - A kind of high speed and high pressure frictional wear experiment platform and its electrohydraulic control system - Google Patents
A kind of high speed and high pressure frictional wear experiment platform and its electrohydraulic control system Download PDFInfo
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- CN107478531A CN107478531A CN201710785494.2A CN201710785494A CN107478531A CN 107478531 A CN107478531 A CN 107478531A CN 201710785494 A CN201710785494 A CN 201710785494A CN 107478531 A CN107478531 A CN 107478531A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a kind of high speed and high pressure frictional wear experiment platform and its electrohydraulic control system, including experiment porch mechanism, hydraulic system and electric-control system, the experiment porch mechanism includes casing, the upper end of the casing is provided with casing upper end cover, hub bearing is equiped with the lateral wall of the opening of the casing upper end cover, the outer sheath of the hub bearing is provided with belt hub, and the outer sheath of the belt hub is provided with belt；The hydraulic system includes the flow speed control valve two being connected with main shaft cooling-part, and the other end of the flow speed control valve two is connected with pressure-reducing valve；The electric-control system includes main circuit and PLC control circuits.The friction and wear behavior test that the present invention not only may be implemented in different medium environment, the friction and wear behavior test that also may be implemented under different rotating speeds and different loads, as a result of hydraulic pressure cooling technology and variable-frequency control technique, the rotating speed of experiment porch and the adaptability of load are greatly increased.
Description
Technical field
The present invention relates to high speed and high pressure frictional wear experiment platform technology field, more particularly to a kind of high speed and high pressure friction mill
Damage experiment porch and its electrohydraulic control system.
Background technology
A kind of friction-wear test, testing of materials of measure material resistance wear resistance, can be compared by this experiment
The wearability of material is good and bad.Wear test is more complicated than the testing of materials of routine.Firstly the need of the specific works for considering parts
Condition simultaneously determines wear form, then selectes suitable test method, to make result of the test more be coincide with actual result, mill
Disfigurement formula has abrasive wear, adhesive wear, contact fatique wear, fretting wear, cavitation erosion etc..It is but past under the conditions of real-world operation
It is past to occur a kind of wear form incessantly, such as high-power diesel engine bearing shell may occur adhesive wear and cavitation erosion simultaneously.With other
Experiment is compared, and wear test is loaded, speed, temperature, surrounding medium, surface roughness, lubrication and the coupling factor such as material
Influence bigger.Experimental condition should be as consistent with physical condition as possible, the reliability of ability guarantee test result, current friction mill
The experimental facilities manufacturing cost of damage is high, it is even more important that the mode that upper friction member fixture is connected with main shaft is not used to transmit
Larger rotating speed, there is relative rotation between upper friction member and fixture, have certain influence for the measurement result of rotating speed；Except this it
Outside, it is usually the load mode using feed screw nut to commonly use frictional wear experiment platform, also less by the way of frequency control,
Thus, the adaptability of its rotating speed and load is not strong, it is impossible to adapts to the requirement of high speed and high pressure friction and wear behavior test.
The content of the invention
It is not good enough the invention aims to solve Detection results in the prior art, it is impossible to adapt to high speed and high pressure friction mill
The problem of damaging the requirement of performance test, and a kind of high speed and high pressure frictional wear experiment platform and its electrohydraulic control system proposed.
To achieve these goals, present invention employs following technical scheme：
A kind of high speed and high pressure frictional wear experiment platform and its electrohydraulic control system, including experiment porch mechanism, hydraulic pressure system
System and electric-control system, the experiment porch mechanism include casing, and the upper end of the casing is provided with casing upper end cover,
Two hub bearings are equiped with the lateral wall of the opening of the casing upper end cover, the outer sheath of the hub bearing is provided with skin
Band wheel hub, the outer sheath of the belt hub are provided with belt, and the one end of the belt away from belt hub is connected with the first motor,
First motor is provided with the pulley rotation axle with belt rotation connection, and the upper end of the belt hub is provided with sleeve, institute
The upside for stating sleeve is provided with fastening round nut, it is described have be inserted with main shaft in the middle part of fastening round nut, the main shaft through sleeve,
Belt hub and the inside for extending to casing, the junction of the casing upper end cover and casing pass through multiple fastenings six
The connection of angle nut, the madial wall of the casing opening are provided with the big bearing being connected with main shaft, under the big bearing
Side is provided with main shaft cooling-part, and sealing ring is provided between the main shaft cooling-part and big bearing, the main shaft cooling-part
Cooling-part fluid entrance and the outlet of cooling-part fluid are offered in side wall respectively, the lower end of the main shaft is provided with spanner mouth,
The downside of the spanner mouth is provided with upper friction member clamping device, and friction is provided with the downside of the upper friction member clamping device
Part, the upper friction member are in contact with lower friction member in the presence of loading system so as to produce friction, the lower friction member
On base, lubricant oil reservoir is also housed, the outside of the lubricant oil reservoir is equipped with heater, described on the base
The bottom of lubricant oil reservoir offers media outlet groove, fore-set is also equipped with the base, the fore-set is with being arranged on fuselage
Pressure sensor contact is produced during friction testing, the downside of the base is provided with multiple base alignment bearings, described
Connection support member is additionally provided with the downside of base, base spring bearing, the connection are provided between the connection support member and base
Base coupling spindle is equiped with the middle part of support member, the downside of the connection support member is provided with loading piston, and base coupling spindle
It is connected with loading piston, the lower surface of the casing is provided with casing bottom end cover, and the middle part of the casing bottom end cover is provided with liquid
Pressure loading fluid entrance；Lower friction member is not installed in below friction member, and both are usually discontiguous, are only in loading
In the presence of system, upper friction member just moves downward to be in contact with lower friction member, and then produces friction.
The hydraulic system includes the flow speed control valve two being connected with main shaft cooling-part, the other end connection of the flow speed control valve two
There is a pressure-reducing valve, the one end of the deceleration valve away from main shaft cooling-part is connected to fine filter, pressure gauge, overflow valve and suitable
Sequence valve, the one end of the sequence valve away from pressure-reducing valve are connected to 3-position-3-way solenoid directional control valve and 3-position 4-way electromagnetic switch
Valve, the described one end of 3-position-3-way solenoid directional control valve away from sequence valve are connected with flow speed control valve one, the 3-position 4-way electromagnetic switch
The one end of valve away from sequence valve is connected with pressure switch and hydraulic cylinder, and the one end of the fine filter away from pressure-reducing valve is provided with outer
Intermeshing gear pump, the external gear rotary pump are connected with the second motor by tooth form yielding coupling；
The electric-control system includes main circuit and PLC control circuits, and the main circuit includes motor M1, motor M2, three-phase
Inverter output filters, three phase mains electromagnetic interface filter, frequency converter, zero phase reactor and breaker, the motor M1 and first
Motor electrically connects, and the motor M2 electrically connects with the second motor.
Preferably, the casing upper end cover and casing bottom end cover are threadedly coupled by fastening bolt with casing.
Preferably, it is equiped with friction force sensor on the lateral wall of the cabinet shell.
Preferably, the pressure sensor is arranged on external fuselage.
Preferably, the oil absorption filter is connected to fuel tank, liquid level gauge and air cleaner.
Preferably, the one end of the external gear rotary pump away from fine filter is connected with oil absorption filter.
In the present invention, the improvement of mechanical, electrical, liquid integrated technology has been done to commonly using frictional wear experiment platform, not only can be real
Friction and wear behavior test in present different medium environment, the fretting wear that also may be implemented under different rotating speeds and different loads
Performance test, as a result of hydraulic pressure cooling technology and variable-frequency control technique, greatly increase the rotating speed of experiment porch and bear
The adaptability of load, its maximum speed up to 3000r/min, highest loading force up to 10kN, meanwhile, its automaticity obtains
Great raising.
Brief description of the drawings
Fig. 1 shows for the structure of a kind of high speed and high pressure frictional wear experiment platform proposed by the present invention and its electrohydraulic control system
It is intended to；
Fig. 2 is a kind of high speed and high pressure frictional wear experiment platform proposed by the present invention and its electrohydraulic control system electric-control system
Main circuit diagram；
Fig. 3 is a kind of high speed and high pressure frictional wear experiment platform proposed by the present invention and its electrohydraulic control system electric-control system
PLC electric operation control circuit figures；
Fig. 4 is a kind of high speed and high pressure frictional wear experiment platform proposed by the present invention and its electrohydraulic control system hydraulic system
Fundamental diagram.
In figure：1 fastening round nut, 2 main shafts, 3 sleeves, 4 belt hubs, 5 hub bearings, 6 belts, 7 casing upper end covers, 8
Fastening bolt, 9 casings, 10 main shaft cooling-parts, 11 cooling-part fluid entrances, friction member clamping device on 12, on 13
Friction member (explanation, be not upper friction member fixture), 14 friction force sensors, 15 base alignment bearings, 16 connection support members, 17 add
Carry piston, 18 casing bottom end covers, 19 hydraulic loaded fluid entrances, 20 base coupling spindles, 21 base spring bearings, 22 temperature surveys
Device, 23 bases, 24 fore-sets, 25 pressure sensors, 26 media outlet grooves, 27 times friction members (explanation, are not lower friction member folders
Tool), 28 heaters, 29 lubricant oil reservoirs, 30 spanner mouths, the outlet of 31 cooling-part fluid, 32 sealing rings, 33 big bearings, 34
Fasten hex nut, 35 pulley rotation axles, 36 first motors, 37 fuselages, 38 fuel tanks, 39 oil absorption filters, 40 liquid level gauges, 41
Air cleaner, 42 second motors, 43 tooth form yielding couplings, 44 external gear rotary pumps, 45 fine filters, 46 pressure gauges, 47
Overflow valve, 48 sequence valves, 49 pressure switches, 50 3-position-3-way solenoid directional control valves, 51 flow speed control valves one, 52 3-position 4-way electromagnetism change
To valve, 53 flow speed control valves two, 54 pressure-reducing valves, 55 hydraulic cylinders.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.
In the description of the invention, it is to be understood that term " on ", " under ", "front", "rear", "left", "right", " top ",
The orientation or position relationship of the instruction such as " bottom ", " interior ", " outer " are based on orientation shown in the drawings or position relationship, merely to just
In the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation, with
Specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Reference picture 1-4, a kind of high speed and high pressure frictional wear experiment platform and its electrohydraulic control system, including experiment porch machine
Structure, hydraulic system and electric-control system, experiment porch mechanism include casing 9, and the upper end of casing 9 is provided with casing upper end
Lid 7, two hub bearings 5 is equiped with the lateral wall of the opening of casing upper end cover 7, the outer sheath of hub bearing 5 is provided with skin
Band wheel hub 4, the outer sheath of belt hub 4 are provided with belt 6, and the one end of belt 6 away from belt hub 4 is connected with the first motor 36,
First motor 36 is provided with the pulley rotation axle 35 being rotatablely connected with belt 6, and the upper end of belt hub 4 is provided with sleeve 3, sleeve
3 upside is provided with fastening round nut 1, and the middle part for having fastening round nut 1 is inserted with main shaft 2, and main shaft 2 is through sleeve 3, belt hub
4 and the inside of casing 9 is extended to, the junction of casing upper end cover 7 and casing 9 passes through multiple fastening hex nuts 34
Connection, the madial wall of the opening of casing 9 are provided with the big bearing 33 being connected with main shaft 2, and the downside of big bearing 33 is provided with master
Axle cooling-part 10, is provided with sealing ring 32 between main shaft cooling-part 10 and big bearing 33, in the side wall of main shaft cooling-part 10
Cooling-part fluid entrance 11 and cooling-part fluid outlet 31 are offered respectively, and the lower end of main shaft 2 is provided with spanner mouth 30, spanner
The downside of mouth 30 is provided with upper friction member clamping device 12, and the downside of upper friction member clamping device 12 is provided with friction member 13, on
Friction member 13 is in contact with lower friction member 27 in the presence of loading system so as to produce friction, and lower friction member (27) is arranged on
On base 23, lubricant oil reservoir 29 is also housed on base 23, the outside of lubricant oil reservoir 29 is equipped with heater 28, and lubricating oil holds
The bottom of device 29 offers media outlet groove 26, and fore-set 24 is also equipped with base, and fore-set 24 passes with the pressure on fuselage
Sensor 25 produces contact during friction testing, and the downside of base 23 is provided with multiple base alignment bearings 15, under base 23
Side is additionally provided with connection support member 16, couples and base spring bearing 21 is provided between support member 16 and base 23, couples support member 16
Middle part be equiped with base coupling spindle 20, the downside of connection support member 16 is provided with loading piston 17, and base coupling spindle 20 also with
Loading piston 17 connects, and the lower surface of casing 9 is provided with casing bottom end cover 18, and the middle part of casing bottom end cover 18 adds provided with hydraulic pressure
Fluid entrance 19 is carried, casing upper end cover 7 and casing bottom end cover 18 are threadedly coupled by fastening bolt 8 with casing 9, casing
Friction force sensor 14 is equiped with the lateral wall of shell 9, pressure sensor 25 is arranged on external fuselage 37；
Hydraulic system includes the flow speed control valve 2 53 being connected with main shaft cooling-part 10, and the other end of flow speed control valve 2 53 is connected with
Pressure-reducing valve 54, the one end of deceleration valve 54 away from main shaft cooling-part 10 are connected to fine filter 45, pressure gauge 46, overflow valve
47 and sequence valve 48, the one end of sequence valve 48 away from pressure-reducing valve 54 be connected to 3-position-3-way solenoid directional control valve 50 and three four
Electric change valve 52, the one end of 3-position-3-way solenoid directional control valve 50 away from sequence valve 48 are connected with flow speed control valve 1, three four
The one end of electric change valve 52 away from sequence valve 48 is connected with pressure switch 49 and hydraulic cylinder 55, and fine filter 45 is remote to be subtracted
One end of pressure valve 54 is provided with external gear rotary pump 44, and external gear rotary pump 44 is connected with the second electricity by tooth form yielding coupling 43
Machine 42, oil absorption filter 39 are connected to fuel tank 38, liquid level gauge 40 and air cleaner 41, and external gear rotary pump 44 is away from essence
One end of filter 45 is connected with oil absorption filter 39；
Electric-control system includes main circuit and PLC control circuits, and it is defeated that main circuit includes motor M1, motor M2, three phase converter
Go out wave filter, three phase mains electromagnetic interface filter, frequency converter, zero phase reactor and breaker, motor M1 is electrically connected with the first motor 36
Connect, motor M2 electrically connects with the second motor 42.
In the present invention, the first motor 36 it is electric after, drive pulley rotation axle 35 to rotate, while drive belt 6 and main
Axle 2 is rotated, and main shaft 2 is fixed with belt hub 4 by a pair oppositely oriented round nuts 1 and sleeve 3；Casing upper end cover 7 is with
End cap 18 is fixed with casing 9 by fastening bolt 8.Due to main shaft 2, caused frictional heat is larger during running at high speed,
Therefore, spy employs main shaft cooling-part 10, the fluid of hydraulic system output enters in the cavity of the main shaft cooling-part 10, from
And the higher section of the submergence caloric value of main shaft 2 is surrounded, heat caused by main shaft is taken away by the Rapid Circulation of fluid, so as to reach
The effect of cooling.Cooling-part fluid entrance 11 and cooling-part fluid outlet 31 be respectively the cooling-part fluid entrance and
Outlet.Upper friction member clamping device 12 inserts the lower end of main shaft 2, by the ellipse around boss at the top of it, with opening for the lower end of main shaft 2
Groove coordinates, and can be separated upper friction member clamping device 12 together with upper friction member 13 and main shaft 2 by spanner mouth 30.In hub bearing
5 and big bearing 33 support under, main shaft 2 rotates at a high speed under the drive of belt 6, friction member clamping device 12 and is above rubbed in drive
Wipe part 13 to rotate at a high speed, so as to produce friction with lower friction member 27.Upper friction member 13 is arranged on clamping device 12 by pin, under
Friction member 27 is arranged on base 23 by pin.14 be friction force sensor, for measuring the friction between friction member in real time
Power；22 be temperature measuring equipment, for measuring the temperature of friction process in real time；25 is are fixed on the pressure sensor on fuselage,
For measuring the moment of torsion of rotary shaft, pressure sensor need to coordinate with fore-set 24 during measurement.Lubricant oil reservoir 29 can be used for containing not
Same lubricating oil, the top of base 23 is arranged on by external screw thread, for realizing the upper and lower friction member in differentiated friction media environment
Between friction.28 be heater, upper and lower in the friction media environment of different temperatures to realize for being heated to medium
Frictional experiment test between friction member, media outlet groove 26 are used to discharge friction media, and the hydraulic system is divided into two branch roads：
One is cooling branch road, is made up of pressure-reducing valve 17, flow speed control valve 16 and main shaft cooling-part 10；One flows through sequence valve 48
Load branch road, branch route sequence valve 48,3-position-3-way solenoid directional control valve 50, flow speed control valve 1, three-position four-way electromagnetic directional valve
52nd, pressure switch 49 and hydraulic cylinder 55 are formed.In order to prevent influencing each other for two branch roads, especially load branch road and be in
To the influence of cooling branch road during unloading condition, before fluid enters loading branch road, spy is provided with sequence valve 48.Whole hydraulic pressure system
System has been provided with the overflow valve 47 of safeguard protection effect in the outlet of gear pump by motor-driven gear oil pump feed；In order to protect
The cleaning of fluid is demonstrate,proved, oil absorption filter 39 and fine filter 45 are respectively arranged with into and out of hydraulic fluid port in gear pump；In order to monitor tooth
The outlet pressure of wheel pump, there is provided pressure gauge 46；Liquid level gauge 40 and air cleaner 41 are additionally provided with fuel tank, the former is used for
The liquid level of fuel tank inner fluid is monitored, the latter is used to prevent the debris in air from entering in the fluid of fuel tank, by cooling branch road institute
The oil pressure needed is not high, therefore, needing to depressurize the oil pressure for entering the branch road first, therefore, special be provided with pressure-reducing valve 54, works as oil
Liquid is after the decompression of pressure-reducing valve 54, and in entrance before main shaft cooling-part 10, the tune of flow need to be carried out by flow speed control valve 53
Section, so as to reach the purpose being controlled to cooling velocity, when 3-position-3-way solenoid directional control valve 50 is in middle position, pass through order
The hydraulic oil of valve 48 is directly entered fuel tank, i.e., the off-load shape in Median Function by the middle position of 3-position-3-way solenoid directional control valve 50
State, now, hydraulic cylinder 55 are in off working state；When the left side electromagnet of 3-position-3-way solenoid directional control valve 50 obtains electric and it is in left position
During working condition, if the left side electromagnet of three-position four-way electromagnetic directional valve 52 obtain it is electric and when being in left position working condition, hydraulic cylinder
The just motion upwards of 55 piston, implements loading function, now can be by adjusting the openings of sizes of flow speed control valve come controlled loading speed
(when the opening of flow speed control valve tunes up, increased by the flow of 3-position-3-way solenoid directional control valve 50 and flow speed control valve, then into three
The flow of four-way electromagnetic reversing valve 52 and hydraulic cylinder 55 is reduced by, and causes loading velocity to decline；Conversely, loading velocity rises)；When
When 3-position-3-way solenoid directional control valve 50 works in left position, if three-position four-way electromagnetic directional valve 52 works in right position, hydraulic cylinder 55
Piston just decline, i.e. depart from the upper friction member 13 shown in Fig. 1 and lower friction member 27, without frictional wear experiment, hydraulic pressure
The piston rotation perdurability of cylinder 55 can be also adjusted by flow speed control valve immediately；When 3-position-3-way solenoid directional control valve 50 works in right position
When, fluid is just ended into 3-position-3-way solenoid directional control valve 50, and now, three-position four-way electromagnetic directional valve 52 should pass through control
System controls it to be in middle position state, and (now three-position four-way electromagnetic directional valve 52 is operable with left position or right position, can also realize
The raising and lowering of the piston of hydraulic cylinder 55, but the adjustment control of the not modulated valve of its raising and lowering, thus do not recommend such a work
Make state), in the presence of the Median Function of three-position four-way electromagnetic directional valve 52, hydraulic cylinder 55 is ended into and out of oil circuit, in guarantor
Pressure condition, now, loading force maintain a definite value, that is, the fretting wear realized under certain definite value loading force is realized, now
Loading oil pressure monitored by pressure switch.Because the pressurizing features of the Median Function of three-position four-way electromagnetic directional valve 52 are by three
The structural behaviour of of four-way electromagnetic reversing valve 52 itself is come what is determined, and after a period of time, the pressure of hydraulic cylinder 55 is because of structure leakage
It will be gradually reduced, when being reduced to the pressure value of the setting of pressure switch 49, pressure switch 49 will send electric signal, to control
Three-position four-way electromagnetic directional valve 52 and 3-position-3-way solenoid directional control valve 50 it is electric (continue to test if necessary to intensified pressure,
It is electric that 3-position-3-way solenoid directional control valve 50 and three-position four-way electromagnetic directional valve 52 are all that left position obtains；If necessary to stop testing, three
50 left position of three-way solenoid valve obtains electric, and 52 right position of three-position four-way electromagnetic directional valve obtains electric), frequency converter timing circuit is mainly by becoming
The main circuit of frequency device, frequency control motor M, circuit breaker Q F, contactor KM etc. are formed.Motor M1 drive belt wheel shafts, then
Pass through V belt translation drive shaft；Motor M2 drives the motor of hydraulic pump, controls the keying of hydraulic circuit, and PLC uses with frequency converter
The mode of control terminal connection.PLC input terminal connection control button, alarm and power supply, the middle relay of lead-out terminal connection
Device coil, indicator lamp and power supply.Auxiliary reclay coil KA2, KA3 pass through its normally opened contact and the line of main circuit contact device respectively
Circle connection, and then control break-make and spindle motor, the start-stop of hydraulic pump motor of frequency converter main power source.The simulation input of frequency converter
Signal and PLC analog output module are connected with twisted-pair feeder shielded cable.After circuit breaker Q F is connected, upper indicator lamp is bright, KM1
With KM2 it is electric, KM2 get an electric shock closure, shaft rotating motor startup button SB1 connect when, KA2 obtain it is electric, while KA2 get an electric shock closure, become
Frequency device starts, while KM1 gets an electric shock closure, and motor M1 obtains electric, and spindle motor start indicator lamp is bright.After cage knob SB4 is connected, KA3 is obtained
Electricity, while KA3 gets an electric shock and closed, hydraulic pump motor M2 obtains electric, hydraulic pressure pump startup.The left position work of 3-position-3-way solenoid valve reversal valve
When, SB5 is connected, and KA4 obtains electric, and the left position relay indicating light of 3-position-3-way solenoid valve reversal valve is bright；3-position-3-way solenoid valve reversal valve
When left position is stopped, SB6 is connected, and KA4 power-off, the left position relay indicating light of 3-position-3-way solenoid valve reversal valve goes out；3-position-3-way
During the work of magnetic valve reversal valve right position, SB7 is connected, and KA5 obtains electric, and the right position relay indicating light of 3-position-3-way solenoid valve reversal valve is bright；
When the right position of 3-position-3-way solenoid valve reversal valve is stopped, SB8 is connected, KA5 power-off, the left position work of 3-position-3-way solenoid valve reversal valve
Gone out as indicator lamp；When the one of electric shocks of SB6 and SB8 are connected, 3-position-3-way solenoid valve reversal valve is at middle position state.Three
When the left position of four way solenoid valve reversal valve works, SB9 is connected, and KA6 obtains electric, the left position relay indicating light of three position four-way electromagnetic valve reversal valve
It is bright；When the left position of three position four-way electromagnetic valve reversal valve is stopped, SB10 is connected, KA6 power-off, and three position four-way electromagnetic valve reversal valve is left
Position relay indicating light goes out；When the right position of three position four-way electromagnetic valve reversal valve works, SB11 is connected, and KA7 obtains electric, three position four-way electromagnetic valve
The right position relay indicating light of reversal valve is bright；When the right position of three position four-way electromagnetic valve reversal valve is stopped, SB12 is connected, KA7 power-off, and three
The left position relay indicating light of position four-way solenoid valve reversal valve goes out；When the one of electric shocks of SB10 and SB12 are connected, 3-position 4-way electromagnetism
Valve reversal valve is at middle position state.
Control power supply auxiliary input terminals R0, T0 are connected to the outlet side of breaker, to prevent frequency converter defencive function from moving
Frequency converter switches off the control circuit dead electricity for making frequency converter when making.PLC input terminals control the energization of each solenoid directional control valve with
It is no, control corresponding position indicator lamp bright, while change the working position of reversal valve.Analog input mModule will run each sensor in scene
Signal and motor output speeds feedback signal carry out A/D conversions and deliver to host computer, realize closing for the shaft rotating motor speed of service
Ring controls and the real-time monitoring of running environment.Filter capacitor is connected to the input side of frequency converter, to reduce AM radio bandses
The noise of (below 1MHz).
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (6)
1. a kind of high speed and high pressure frictional wear experiment platform and its electrohydraulic control system, including experiment porch mechanism, hydraulic system
And electric-control system, the experiment porch mechanism include casing (9), it is characterised in that the upper end of the casing (9)
Provided with casing upper end cover (7), two hub bearings (5), institute are equiped with the lateral wall of the opening of the casing upper end cover (7)
The outer sheath for stating hub bearing (5) is provided with belt hub (4), and the outer sheath of the belt hub (4) is provided with belt (6), described
The one end of belt (6) away from belt hub (4) is connected with the first motor (36), and first motor (36) is provided with and belt
(6) the pulley rotation axle (35) of rotation connection, the upper end of the belt hub (4) are provided with sleeve (3), the sleeve (3)
Upside be provided with fastening round nut (1), it is described have main shaft (2) is inserted with the middle part of fastening round nut (1), the main shaft (2) is run through
Sleeve (3), belt hub (4) simultaneously extend to the inside of casing (9), the casing upper end cover (7) and casing (9)
Junction is connected by multiple fastening hex nuts (34), and the madial wall of casing (9) opening is provided with and main shaft
(2) the big bearing (33) of connection, the downside of the big bearing (33) is provided with main shaft cooling-part (10), the main shaft cooling-part
(10) sealing ring (32) is provided between big bearing (33), cooling is offered respectively in the side wall of the main shaft cooling-part (10)
Part fluid entrance (11) and cooling-part fluid outlet (31), the lower end of the main shaft (2) is provided with spanner mouth (30), described to pull
The downside of hand mouth (30) is provided with upper friction member clamping device (12), is provided with the downside of the upper friction member clamping device (12)
Friction member (13), the upper friction member (13) is in contact with lower friction member (27) in the presence of loading system to be rubbed so as to produce
Wipe, the lower friction member (27) is arranged on base (23), and lubricant oil reservoir (29), the profit are also housed on the base (23)
The outside of lube oil container (29) is equipped with heater (28), and the bottom of the lubricant oil reservoir (29) offers media outlet groove
(26) fore-set (24), is also equipped with the base, the fore-set (24) is being rubbed with the pressure sensor (25) on fuselage
Wipe and contact is produced in test process, the downside of the base (23) is provided with multiple base alignment bearings (15), the base (23)
Downside be additionally provided with connection support member (16), it is described connection support member (16) and base (23) between be provided with base spring bearing
(21) base coupling spindle (20), is equiped with the middle part of the connection support member (16), is set on the downside of the connection support member (16)
There is loading piston (17), and base coupling spindle (20) is also connected with loading piston (17), the lower surface of the casing (9) is set
There is casing bottom end cover (18), the middle part of the casing bottom end cover (18) is provided with hydraulic loaded fluid entrance (19)；
The hydraulic system includes the flow speed control valve two (53) that is connected with main shaft cooling-part (10), the flow speed control valve two (53) it is another
One end is connected with pressure-reducing valve (54), and the one end of the deceleration valve (54) away from main shaft cooling-part (10) is connected to smart filtering
Device (45), pressure gauge (46), overflow valve (47) and sequence valve (48), the sequence valve (48) one end away from pressure-reducing valve (54) point
3-position-3-way solenoid directional control valve (50) and three-position four-way electromagnetic directional valve (52), the 3-position-3-way solenoid directional control valve are not connected with
(50) one end away from sequence valve (48) is connected with flow speed control valve one (51), and the three-position four-way electromagnetic directional valve (52) is away from order
One end of valve (48) is connected with pressure switch (49) and hydraulic cylinder (55), the remote pressure-reducing valve (54) of the fine filter (45)
One end is provided with external gear rotary pump (44), and the external gear rotary pump (44) is connected with second by tooth form yielding coupling (43)
Motor (42)；
The electric-control system includes main circuit and PLC control circuits, and the main circuit includes motor M1, motor M2, three phase variable frequency
Device output filter, three phase mains electromagnetic interface filter, frequency converter, zero phase reactor and breaker, the motor M1 and the first motor
(36) electrically connect, the motor M2 electrically connects with the second motor (42).
2. a kind of high speed and high pressure frictional wear experiment platform according to claim 1 and its electrohydraulic control system, its feature
It is, the casing upper end cover (7) and casing bottom end cover (18) are threadedly coupled by fastening bolt (8) with casing (9).
3. a kind of high speed and high pressure frictional wear experiment platform according to claim 1 and its electrohydraulic control system, its feature
It is, friction force sensor (14) is equiped with the lateral wall of the cabinet shell (9).
4. a kind of high speed and high pressure frictional wear experiment platform according to claim 1 and its electrohydraulic control system, its feature
It is, the pressure sensor (25) is arranged on external fuselage (37).
5. a kind of high speed and high pressure frictional wear experiment platform according to claim 1 and its electrohydraulic control system, its feature
It is, the oil absorption filter (39) is connected to fuel tank (38), liquid level gauge (40) and air cleaner (41).
6. a kind of high speed and high pressure frictional wear experiment platform according to claim 1 and its electrohydraulic control system, its feature
It is, the one end of the external gear rotary pump (44) away from fine filter (45) is connected with oil absorption filter (39).
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| CN201710785494.2A CN107478531B (en) | 2017-09-04 | 2017-09-04 | High-speed high-pressure friction and wear experiment platform and electrohydraulic control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710785494.2A CN107478531B (en) | 2017-09-04 | 2017-09-04 | High-speed high-pressure friction and wear experiment platform and electrohydraulic control system thereof |
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| CN107478531B CN107478531B (en) | 2023-05-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142121A (en) * | 2018-09-30 | 2019-01-04 | 长沙学院 | A kind of shield cutter material wear test platform |
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| Publication number | Publication date |
|---|---|
| CN107478531B (en) | 2023-05-02 |
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