CN106438515B - Pressurized strut class cold performance test platform hydraulic system - Google Patents
Pressurized strut class cold performance test platform hydraulic system Download PDFInfo
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- CN106438515B CN106438515B CN201611078080.8A CN201611078080A CN106438515B CN 106438515 B CN106438515 B CN 106438515B CN 201611078080 A CN201611078080 A CN 201611078080A CN 106438515 B CN106438515 B CN 106438515B
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/022—Installations or systems with accumulators used as an emergency power source, e.g. in case of pump failure
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/62—Cooling or heating means
Abstract
A kind of a kind of pressurized strut class cold performance test platform hydraulic system disclosed by the invention, it is desirable to provide the cold performance test platform hydraulic system that refrigeration is rapid, can accurately simulate assigned temperature cold oil moment enters product situation.The technical scheme is that：In flush cycle system, the rodless cavity high-pressure ball valve in parallel two-by-two of the first of tested pressurized strut oil inlet and outlet parallel pipeline, rod chamber high-pressure ball valve and its concatenated second logical oily high pressure needle valve of rodless cavity in parallel two-by-two of going the same way, the logical oily high pressure needle valve of rod chamber passes through the O-shaped solenoid directional control valve of parallel transistor connection test of going the same way, the experiment cooling position solenoid directional control valve in Y types of O-shaped solenoid directional control valve series connection, cooling cycle is connected to refrigeration system, formed oil circuit where being fully cooled rod chamber and rodless cavity from cooling circuit, it will when position solenoid directional control valve is for cooling cycle in Y types, pipeline unicom where rod chamber high-pressure ball valve, oil circuit where being fully cooled the logical oily high pressure needle valve of rodless cavity and the logical oily high pressure needle valve of rod chamber.
Description
Technical field
The present invention relates in hydraulic machinery field, simulation ultralow temperature fluid moment enters actuator cylinder oil pocket situation
Pressurized strut class cold performance test platform hydraulic system, pressurized strut class cold performance test platform are according to pressurized strut class hydraulic pressure oil stream
The key technical indexes such as amount/pressure/servo valve, working media temperature and test ambient temperature etc. require and the special low temperature of design
Performance detection apparatus.Its main feature is that easy to operate, it can greatly shorten fluid cooling time, accurately.
Background technology
Hydraulic actuator is the key component of plane hydraulic system, by the parts group such as lid, outer barrel, piston rod, rubber seal
At the assembling of component will cover and outer barrel is combined.Hydraulic actuator is being obtained as a kind of powered actuation mechanism
It is widely applied.Pressurized strut reliability test bench is the reliability test completed pressurized strut and loaded under different operating environment, is needed
Simulate working condition of the pressurized strut under high/low temperature and different load conditions.One critical index of testing stand is exactly
Ensure that product is tested within the specified temperature range.In testing stand work, one 54 DEG C of hydraulic pressure transfer performance temperature in use
To+135 DEG C.Refrigerating capacity test requirements document oil temperature within 2 hours drops to one 48 DEG C by room temperature, also has at one 48 DEG C or so very low
Evaporating temperature.Evaporating temperature is lower, and compressor pressure ratios are bigger, and circularly cooling amount is lower, and compressor power consumption is bigger, coefficient of refrigerating performance
It is poorer to decline refrigeration cycle economy.Since the low temperature Hydraulic Elements especially low temperature pumping source source of goods is in great shortage and expensive, meanwhile,
Element manipulation environmental condition deteriorates under low temperature, substantially reduces the service life of Hydraulic Elements, therefore take using a large amount of low temperature Hydraulic Elements
It is very uneconomic method to build hydraulic test bench.In addition, system work is at low ambient temperatures, and due to expanding with heat and contract with cold, system pipes
Road length and impulse stroke all can respective change, especially experimental table oil path is longer, these problems in hydraulic actuator load characteristic,
In the experiment of the fatigue resistances such as vibration, fatigue, due to the frequency of start is high, stroke is long, load is big etc., the load of hydraulic actuator
Characteristic is had different manifestations by the influence degree of compressibility and the graphic characteristics of load curve of oil.Accumulator, that is, piston type stores
It can device.Hydraulic Test Technique will adequately test hydraulic system and Hydraulic Elements, be necessarily required to a large amount of data into
Row acquisition and processing, Hydraulic Test Technique and information technology combine closely and can just meet the needs of Modern hydraulic measuring technology.Liquid
The automation control of pressure system is inseparable with hydraulic test, and hydraulic system closed loop feedback control inevitable requirement joins hydraulic system
Number is measured and is fed back, and in hydraulic test, needs the detection of a variety of physical quantitys.In the prior art, pressurized strut class low temperature properties
Energy testing stand hydraulic system is mainly by parts groups such as room temperature hydraulic energy source, cryogenic refrigerating unit and working state control units
At.In the prior art, hydraulic system works under low temperature, high pressure, big flow operating condition can make many problems become to compare
Complexity, the design of system are also required to constantly improve, to improve the performance and used life of system.In design experiment platform due to
Systematic comparison is big, and pressure is also very high, needs careful consideration there are many more problem.Currently, domestic existing simulation ultralow temperature oil
The low-temperature test platform that liquid moment enters actuator cylinder oil pocket situation is all to drive fluid to pass through repeatedly by the working cycles of product
Refrigeration system is crossed, achievees the purpose that reduce oil temperature, the working cycles of product must shift to an earlier date when fluid is not cooled to assigned temperature
The problems such as progress, it is slow that there is cooling rates, and system control is complicated, simulated environment and inconsistent imagination, efficiency is very low, to manpower
Resource, the energy and time loss are big.
It needs to do limiting temperature experiment, the experiment of low-temperature working cycle life before pressurized strut class and accumulator class product export.
The life experiment process of pressurized strut is mainly made of static pressure experiment, circulation experiment, emergent experiment three parts.One work of pressurized strut
Cycle includes that pressurized strut stretches out, stretches out four pressurize, retraction, retraction pressurize work steps.By the requirement of current technology, low-temperature working follows
Ring needs hydraulic oil with specified low temperature (generally at -55 DEG C or so), and moment enters product, carries out working cycles.According to subject
The requirement of the main liquid element of working condition and life test rack of pressurized strut, it is past can be divided into room temperature by life test rack
Multiple adjustable hydraulic, cryopumps, oil temperature refrigeration unit, low temperature fuel tank (containing overflow valve, service tank etc.), low temperature valve group, subject
The each sections such as pressurized strut form, and brief operation principle is the driving source using room temperature hydraulic power source as low-temperature test platform, automatically controlled
Room temperature driving cylinder processed is reciprocating, and low temperature HYDRAULIC CONTROL SYSTEM is tested pressurized strut and makees reciprocal fortune.Low temperature some refrigerant is steaming
The heat for drawing the object that is cooled in device is sent out, and this heat is transmitted to the refrigerant of high-temperature part, then again by high-temperature part
Heat is transmitted to cooling medium by refrigerant.Since frictional heat, system and the external heat exchange etc. that are generated when power loss, movement are drawn
The experimental bench system oil liquid temperature raising risen is cooled down by cascade refrigeration unit.By in each working cycles of pressurized strut, it is desirable that
It is retracting and pressurize certain time (3 to 5s) on extended position, pressure is 21Mpa or 28Mpa, and system is operated in low temperature ring
Under border, due to expanding with heat and contract with cold, the length of pipe and impulse stroke of system can all change, and especially testing stand oil circuit is long, heat
Effect can be protruded more.One critical index of testing stand seeks to ensure that product carries out reality within the specified temperature range
It tests, and the operating pressure of system is higher, operating temperature is relatively low (- 55 DEG C), and hydraulic oil will become very at such lower temperatures
Thick, and move back and forth under high pressure, friction will be extremely serious, along with being drawn due to power loss, system and external heat exchange etc.
The system oil liquid temperature risen increases so that temperature problem is more prominent.In relation to experiment it can be seen that Wen Sheng after work one hour
At least in l0 or more, the waste heat of each cycle must be siphoned away by refrigeration measure thus, to ensure experiment in regulation temperature
Degree is lower to be completed, the vaporization chamber of refrigeration system must be low -60 DEG C by cold ambient temperature, with reference to existing folding type cooling system
Refrigerating capacity, this fixed temperature is -65 DEG C, for there are bigger leeway.The specific implementation of refrigeration oil temperature unit is by evaporator
It is made the container of the intermediate cooling medium with special nature, refrigerant vaporizes refrigeration intermediate medium, is in heat exchanger pipeline
Cooled hydraulic oil, it is immersed in container, and intermediate medium, which leads to heat transfer, makes hydraulic oil cool down.Refrigeration machine in actual use
The volume of group has current conditions limitation, system, in order to allow refrigeration unit to be fully cooled hydraulic oil, to make system again in design
Tubing length in cold group is not too long, and the oil pipe in refrigeration unit is typically designed to cascade, and doing so can increase
Add the generation of frictional heat, pipeline, which is connected, can also increase the pressure loss of system.To speed when the adjusting product experiment of system speed
It has higher requirements, it is therefore desirable to which the speed of system is adjusted.The speed control of subject pressurized strut is once placed on low temperature side, low
Warm side has reformed into a valve control throttling speed control circuit, spill losses plus restriction loss will make working media temperature drastically on
It rises, is very in this way if the loss of this two parts will have to further increase the refrigeration work consumption of refrigeration unit if taking into account
It is uneconomic, and the rising of refrigeration work consumption is also limited.The also very difficult choosing of the element of low temperature side proportioning valve, and approach of supplying
It has any problem.Doing so may make product rate controlling precision be affected because of reasons such as internal leakages.
Currently, pressurized strut class product and accumulator class product may be implemented in traditional product humid test platform low temperature hydraulic system
Working cycles or static pressure test etc..Oil circulation gets up to generate test requirements document of the lasting heat exchange to reach us,
Therefore there are two types of the modes of former low temperature hydraulic system realization product low-temperature working cycle：
1, the test tools such as external ball valve, pipeline, make fluid in a small range from fuel tank to refrigeration system again to fuel tank shape
At flush cycle, the high pressure needle valve with static pressure test before corresponding product is during which closed.After fluid is cooled to assigned temperature, then
The high pressure needle valve for opening corresponding product send fluid into product.Since high pressure needle valve physical location is in testing stand operation panel
On, product also has longer fluid pressure line in cryogenic box between high pressure needle valve and cryogenic box, remaining in these pipelines and pipeline
Oil is not engaged in small range flush cycle, will not be cooled.After opening needle-valve, pipeline that fluid was not cooled with these and remaining
Oil temperature difference is very big, will produce secondary heat exchange.The fluid of injection product is not actually the fluid of assigned temperature for the first time.
2, it selects a similar-type products in parallel with test products as tooling, passes through tooling pressurized strut or the work of accumulator
It recycles, fluid is driven to pass through refrigeration system, realize heat exchange.Pressurized strut or accumulator oil inlet and outlet need to increase a kind of shut-off valve
When tooling, tooling pressurized strut or accumulator work, such shut-off valve tooling is closed；After fluid is cooled to assigned temperature, this
Kind shut-off valve tooling is opened, and cold oil liquid moment is made to enter pressurized strut, starts product low-temperature working cycle.This mode can be accurate
Simulation ultralow temperature fluid moment enters the case where pressurized strut class or accumulator class product, but there are two apparent disadvantages：One
It is to commutate simply by work since there is no the continuous flushings for realizing fluid for tooling pressurized strut and drive fluid oil inlet oil return, because
The flow of this fluid once-through refrigeration system is very low, needs long time that could fluid be cooled to assigned temperature；Second is that
It needs to increase very complicated tooling, occupies various human and material resources, increase the workload of early-stage preparations and later stage dismounting.
Invention content
The purpose of the present invention is being directed to shortcoming existing for existing humid test platform low temperature hydraulic system, a kind of system is provided
It is cold rapid, easy to operate, it can accurately simulate the pressurized strut class cold performance test that assigned temperature cold oil moment enters product situation
Platform hydraulic system.
The present invention solve technical problem the technical solution adopted is that：A kind of pressurized strut class cold performance test platform hydraulic pressure system
System, including cryopumps, oil temperature refrigeration unit, low temperature fuel tank, low temperature valve group, subject pressurized strut and load pressurized strut constitute follow
Ring refrigeration system 20, and from fuel tank 17 to refrigeration system 20 again to the flush cycle system of the formation of fuel tank 17, it is characterised in that：
In flush cycle system, tested pressurized strut oil inlet and outlet parallel pipeline first two-by-two rodless cavity high-pressure ball valve 25 in parallel,
Rod chamber high-pressure ball valve 26 and its the concatenated second logical oily high pressure needle valve 11 of rodless cavity in parallel, logical oily high pressure of rod chamber two-by-two of going the same way
Needle-valve 12, by the O-shaped solenoid directional control valve of parallel transistor connection test of going the same way, experiment uses Y types with the series connection of O-shaped solenoid directional control valve is cooling
Middle position solenoid directional control valve 30, cooling cycle are connected to refrigeration system 20, form oil circuit where being fully cooled rod chamber and rodless cavity
From cooling circuit, first, rodless cavity high-pressure ball valve 25 in parallel, rod chamber high-pressure ball valve 26 are in parallel two-by-two with second two-by-two
It is parallel with unicom system temperature respectively between the parallel pipeline of the logical oily high pressure needle valve of the logical oily high pressure needle valve 11 of rodless cavity, rod chamber 12
Rod chamber cooling high pressure needle valve 27 in parallel, rodless cavity cool down high pressure needle valve 28 to the third of the parallel pipeline of sensor 15 two-by-two, the
One rodless cavity high-pressure ball valve 25 in parallel, rod chamber high-pressure ball valve 26 by triple valve are connected to third rod chamber in parallel are high two-by-two two-by-two
Pressing valve 27, rodless cavity cooling high pressure needle valve 28 form the channel of fluid cooling cycle；Rod chamber high pressure needle valve 27, rodless cavity are cold
But the hydraulic pressure signal that high pressure needle valve 28 generates is sent by system temperature sensor 15 in operation panel；Position electromagnetic switch in Y types
By 25, rod chamber high-pressure ball valve, 26 place pipeline unicom when valve 30 is for cooling cycle, it is fully cooled the logical oily high pressure needle of rodless cavity
Valve 11 and rod chamber 12 place oil circuit of logical oily high pressure needle valve.
The present invention's has the advantages that compared with the prior art.
Refrigeration is rapid.The present invention tested pressurized strut oil inlet and outlet parallel pipeline first two-by-two parallel high voltage ball valve 25,
26 and its concatenated second parallel high voltage needle-valve 11,12 two-by-two of going the same way, pass through the O-shaped electromagnetic switch of parallel transistor connection test of going the same way
Valve, experiment are connected to refrigeration system 20 with solenoid directional control valve 30 cooling cycle in position in position Y types in O-shaped solenoid directional control valve series connection Y types, can
It is communicated with T mouthfuls with A, B mouth using position in position switching valve in Y types, the lasting temperature difference generates the principles such as lasting heat exchange, disobeys
The case where self-loopa cooling of bad external tooling, accurate simulation process requires, it highly shortened cooling time.Electricity is not interfered with
Pressure holding function when magnetic reversal valve 10 must not be electric, will not cause high pressure oil to enter static pressure fluid column.
It is easy to operate.The present invention is in the first parallel high voltage needle-valve 11,12 two-by-two of parallel high voltage ball valve 25,26 and second two-by-two
Parallel pipeline between be parallel with the parallel pipeline third of unicom temperature sensor 15 parallel high voltage needle-valve 27,28 two-by-two respectively,
First two-by-two parallel high voltage ball valve 25,26 pass through triple valve be connected to third two-by-two parallel high voltage needle-valve 27,28 form fluid cooling
The channel of cycle facilitates operation.
Can accurately simulate assigned temperature cold oil moment enters product situation.The present invention is using the first parallel high voltage ball valve two-by-two
25,26 by triple valve be connected to third two-by-two parallel high voltage needle-valve 27,28 form fluid cooling cycle channel；High pressure needle valve
27,28 generate hydraulic pressure signals by temperature sensor 15 be sent into operation panel can accurately simulate assigned temperature cold oil moment into
Enter product situation.
The present invention increases high-pressure ball valve 25,26,29 on the basis of original hydraulic system, position in high pressure needle valve 27,28, Y types
Solenoid directional control valve 30 makes original hydraulic system have controllable from cooling circulatory function, can be suitble to pressurized strut class product and pressure accumulation
Fluid cooling before device class product low-temperature working cycle.
Description of the drawings
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is pressurized strut class cold performance test platform hydraulic system principle figure.
In figure：1 rodless cavity temperature sensor, 2 rod chamber temperature sensors, 3 rodless cavity static pressure high pressure needle valves, 4 tested works
Dynamic cylinder, 5 rod chamber static pressure high pressure needle valves, 6 static pressure fluid columns, 7 static pressure pressure sensors, 8 accumulator static pressure high pressure needle valves, 9 is tested
Accumulator, 10 test O-shaped solenoid directional control valve, the logical oily high pressure needle valve of 11 rodless cavities, the logical oily high pressure needle valve of 12 rod chambers, 13 pressure accumulations
The logical oily high pressure needle valve of device, 14 check valves, 15 system temperature sensors, 16 accumulator release high pressure needle valves, 17 fuel tanks, 18 static pressure unload
Press high pressure needle valve, 19 system pressure sensors, 20 refrigeration systems, 21 overflow valves, 22 accumulator low voltage electromagnetic ball valves, 23 accumulators
High-voltage electromagnetic ball valve, 24 heat exchangers, 25 rodless cavity high-pressure ball valves, 26 rod chamber high-pressure ball valves, 27 rod chambers cool down high pressure needle valve,
28 rodless cavities cool down high pressure needle valve, 29 accumulator high-pressure ball valves, 30 cooling position solenoid directional control valves in Y types.
Specific implementation mode
It further illustrates the present invention with reference to the accompanying drawings and examples.
Refering to fig. 1.A kind of pressurized strut class cold performance test platform hydraulic system, including cryopumps, oil temperature refrigeration unit,
Low temperature fuel tank, low temperature valve group, subject pressurized strut and the cycle refrigeration system 20 for loading pressurized strut composition, and from fuel tank 17 to system
Cooling system 20 arrives the flush cycle system of the formation of fuel tank 17 again, it is characterised in that：In flush cycle system, in tested pressurized strut
The first of oil inlet and outlet parallel pipeline rodless cavity high-pressure ball valve 25 in parallel, rod chamber high-pressure ball valve 26 and its is gone the same way concatenated two-by-two
The second logical oily high pressure needle valve 11 of rodless cavity in parallel, the logical oily high pressure needle valve 12 of rod chamber two-by-two, passes through parallel transistor connection test of going the same way
With O-shaped solenoid directional control valve, the experiment cooling position solenoid directional control valve 30 in Y types of O-shaped solenoid directional control valve series connection, cooling cycle connection
Refrigeration system 20, formed oil circuit where being fully cooled rod chamber and rodless cavity from cooling circuit, it is in parallel two-by-two first
The logical oily high pressure needle valve 11 of rodless cavity in parallel, rod chamber are logical two-by-two with second for rodless cavity high-pressure ball valve 25, rod chamber high-pressure ball valve 26
The third of the parallel pipeline of unicom system temperature sensor 15 is parallel between the parallel pipeline of oily high pressure needle valve 12 respectively two-by-two
Rod chamber in parallel cooling high pressure needle valve 27, rodless cavity cool down high pressure needle valve 28, first two-by-two rodless cavity high-pressure ball valve 25 in parallel, have
Rod cavity high-pressure ball valve 26 is connected to third rod chamber high pressure needle valve 27 in parallel, rodless cavity cooling high pressure needle valve 28 two-by-two by triple valve
Form the channel of fluid cooling cycle；The hydraulic pressure signal that rod chamber high pressure needle valve 27, rodless cavity cooling high pressure needle valve 28 generate is logical
System temperature sensor 15 is crossed to be sent into operation panel；By 25, rod chamber when position solenoid directional control valve 30 is for cooling cycle in Y types
26 place pipeline unicom of high-pressure ball valve is fully cooled the logical oily high pressure needle valve 11 of rodless cavity and logical 12 place of oily high pressure needle valve of rod chamber
Oil circuit.
Pressure oil port flows through the fluid of refrigeration system by refrigeration system 20 and refrigeration system generates heat exchange.
Experiment changes 30 connection refrigeration systems 20 with the 10 a-road-through supercooling of O-shaped solenoid directional control valve with position electromagnetism in Y types, another
Road connects heat exchanger 24 and static pressure release high pressure needle valve 18 by pipeline.
Heat exchanger 24 connects overflow valve 21 by the bypass duct on pipeline, and overflow valve 21 is connected in parallel on check valve 14 and pressure accumulation
Between device low voltage electromagnetic ball valve 22, accumulator low voltage electromagnetic ball valve 22 passes through the accumulator low voltage electromagnetic ball valve in parallel of check valve 14
22, composition leads to the shunt circuit of tested accumulator 9 by the logical oily high pressure needle valve 13 of accumulator and accumulator high-pressure ball valve.
Overflow valve 21, accumulator low voltage electromagnetic ball valve 22 pass through simultaneously interface pipe connection system pressure sensor 19.
Experiment passes through parallel cartridges rodless cavity 11 concatenated rodless cavity of logical oily high pressure needle valve respectively with O-shaped solenoid directional control valve 10
Logical oily high pressure needle valve 12 concatenated rod chamber high-pressure ball valve 26 connection of high-pressure ball valve 25, rod chamber is tested the rodless cavity of pressurized strut 4
And rod chamber, driving rodless cavity oil inlet push pressurized strut piston rod to stretch out, rod chamber oil inlet pushes pressurized strut piston rod to retract.Examination
It tests quiet by the rod chamber of rod chamber logical oily high pressure needle valve 12 pipeline bypass connection with the oil return opening of O-shaped middle position solenoid directional control valve 10
High pressure needle valve 5 is pressed, connects heat exchanger 24 through static pressure release high pressure needle valve 18, system oil return pipeline oil is high by rod chamber static pressure
The accumulator static pressure high pressure needle valve 8 of take over road connection, accumulator release high pressure needle 16 return to fuel tank 17 by 5 output end of pressing valve.
Experiment changes 30 connections and pressure-adjustable oil sources P phases with the 10 a-road-through supercooling of O-shaped solenoid directional control valve with position electromagnetism in Y types
Logical refrigeration system 20, another way connect heat exchanger 24 and static pressure release high pressure needle valve 18 by pipeline, and heat exchanger 24 passes through pipe
Bypass duct connection overflow valve 21 on road passes through check valve 14 between check valve 14 and accumulator low voltage electromagnetic ball valve 22
Accumulator low voltage electromagnetic ball valve 22 in parallel, composition are led to tested by the logical oily high pressure needle valve 13 of accumulator and accumulator high-pressure ball valve
The shunt circuit of accumulator 9.Overflow valve 21, accumulator low voltage electromagnetic ball valve 22 are passed by simultaneously interface pipe connection system pressure
Sensor 19.The outlet of accumulator low voltage electromagnetic ball valve 22 sets a check valve 14 and passes through parallel connection accumulator high pressure in take over road by check valve 14
Solenoid ball valve 23,23 input terminal of accumulator high-voltage electromagnetic ball valve are connected through 22 input terminal of accumulator low voltage electromagnetic ball valve and interface
System pressure sensor 19 is connected on the side take over road between the outlet of accumulator low voltage electromagnetic ball valve 22 and check valve 14 and is connected with
One is separately connected the adjustable overflow that experiment O-shaped solenoid directional control valve 10 and static pressure release high pressure needle valve 18, heat exchanger 24 connect
Valve 21, overflow valve 21 lead to the low-temp low-pressure working cycles of system oil return pipeline control accumulator class product, accumulator low tension
Working cycles under magnetic ball valve 22,23 shunt circuit of accumulator high-voltage electromagnetic ball valve control accumulator class product systems pressure.It stores
Depressor high-voltage electromagnetic ball valve 23 and check valve 14 lead to oily high pressure needle valve 13 by accumulator together and are connected into tested accumulator 9.Simultaneously
Fuel tank 17 is connected by system temperature sensor 15 and accumulator release high pressure needle valve 16, is fed back by system temperature sensor 15
Oil liquid temperature.
It is parallel with no bar between the high 12 pressing valve 11 of the logical oil of rodless cavity and the logical oily high pressure needle valve output end pipeline of rod chamber
Chamber static pressure high pressure needle valve 3,3 one end of rodless cavity static pressure high pressure needle valve connect rodless cavity temperature sensor 1, and the other end connects static pressure liquid
Column 6, static pressure fluid column 6 connect system oil return pipeline by static pressure release high pressure needle valve 18.When static pressure test, it is tested 9 quilt of accumulator
Measuring pressure is provided by static pressure fluid column 6；When non-static pressure test, all valves for being directly connected to static pressure fluid column are closed, and pass through connection
In 7 feedback pressure signal of static pressure pressure sensor of rod chamber static pressure high pressure needle valve 5 and static pressure release high pressure needle valve 18.In system
In oil return line, accumulator release high pressure needle valve 16 leads to 13 phase of oily high pressure needle valve by system temperature sensor 15 and with accumulator
The contact being even tested between accumulator 9, the rod chamber being connected with rod chamber temperature sensor 2 through accumulator static pressure high pressure needle valve 8
Static pressure high pressure needle valve 5, rodless cavity static pressure high pressure needle valve 3 pass through between rod cavity static pressure high pressure needle valve 5 and rod chamber temperature sensor 2
Channels in series connection rodless cavity high-pressure ball valve 25, rod chamber high-pressure ball valve 26 enter the rodless cavity for being tested pressurized strut 4.
Increase rodless cavity high-pressure ball valve 25, rod chamber high-pressure ball valve 26, rod chamber cools down high pressure needle valve 27, rodless cavity cooling
High pressure needle valve 28, accumulator high-pressure ball valve 29, cooling position solenoid directional control valve 30 in Y types.Enter in the rodless cavity of tested pressurized strut 4
Mouth and rod chamber entrance increase separately rodless cavity high-pressure ball valve 25, rod chamber high-pressure ball valve 26, and fluid is prevented to be cooled to specified temperature
Degree (generally -55 DEG C) advances into tested pressurized strut 4 and pressurized strut is caused to act.Increase in 9 oil inlet inlet of tested accumulator and stores
Depressor high-pressure ball valve 29 prevents fluid to be cooled to assigned temperature (generally -55 DEG C) and advance into tested accumulator 9 and causes accumulator
Action.Increase threeway simultaneously in the rodless cavity and rod chamber of tested pressurized strut 4, being separately connected rodless cavity by threeway cools down high pressure
Needle-valve 28 and rod chamber cool down high pressure needle valve 27, in flush cycle the rodless cavity of tested pressurized strut cooling simultaneously 4,
Two external pipelines of rod chamber, and on/off function is provided.In refrigeration system 20 and experiment between O-shaped solenoid directional control valve 10
Increase cooling position solenoid directional control valve 30 in Y types, for realizing cutting between flush cycle quickly cooling and working cycles both of which
It changes.
By taking the fluid cooling before pressurized strut class low-temperature working cyclic test as an example, in flush cycle system, according to subject
Cylinder diameter, bar diameter and the working cycles requirement of pressurized strut, according to " volume variation is equal " principle, by pressurized strut class cold performance test
Platform design of Hydraulic System is to include the fast-refrigerating cycle of the compositions such as cryopumps, fluid refrigeration system, fuel tank, low temperature valve group
System, the flush cycle system formed again to fuel tank 17 from fuel tank 17 to refrigeration system 20.In rodless cavity smash in parallel two-by-two
Under valve 25 and rod chamber high-pressure ball valve 26,29 closed state of accumulator high-pressure ball valve, it is high to close the relevant rodless cavity static pressure of static pressure
Pressing valve 3, rod chamber static pressure high pressure needle valve 5, accumulator static pressure high pressure needle valve 8 close the accumulator release high pressure of release oil return
Needle-valve 16, static pressure release high pressure needle valve 18 open the logical oily high pressure needle valve 11 of rodless cavity, the logical oil of rod chamber on flush cycle access
The logical oily high pressure needle valve 13 of high pressure needle valve 12, accumulator, rod chamber cooling high pressure needle valve 27, rodless cavity cool down high pressure needle valve 28.It adjusts
Low system pressure opens testing stand, and since three high-pressure ball valves are closed, fluid cannot be introduced into tested pressurized strut 4 and tested accumulator
9, fluid enters pressurized strut class cold performance test platform hydraulic system from oil sources P；Accumulator high-voltage electromagnetic ball valve 23 must conduct,
22 dead electricity of accumulator low voltage electromagnetic ball valve disconnects；Fluid passes through the logical oily high pressure of accumulator high-voltage electromagnetic ball valve 23, accumulator successively
Needle-valve 13, then pass through rod chamber cooling high pressure needle valve 27 respectively, rodless cavity cooling high pressure needle valve 28 flows into and is tested pressurized strut and 4 has bar
Pipeline before pipeline and rodless cavity before chamber；Experiment obtains electric, cooling position solenoid directional control valve in Y types with 10 left end of O-shaped solenoid directional control valve
30 electric must not be in middle position.Two-way fluid flows through solenoid directional control valve 10 through high pressure needle valve 11 and 12 respectively, and cooling in Y types
Converge at the solenoid directional control valve 30 of position, while fuel tank 17 is flowed back to through oil return line.Fluid, which so moves in circles, generates very big stream
Amount, greatly improves the efficiency of heat exchange, lasting temperature difference generates lasting heat exchange, and fluid is cooled rapidly；Work as fluid
When being cooled to assigned temperature, then carries out by current technology regulation the low-temperature circulating of tested pressurized strut 4 and test.At this point, closing has bar
Chamber cools down high pressure needle valve 27, rodless cavity cools down high pressure needle valve 28, opens rodless cavity high-pressure ball valve 25, rod chamber high-pressure ball valve 26,
23 dead electricity of accumulator high-voltage electromagnetic ball valve disconnects, and cooling is obtained electric (being equivalent to access) with position solenoid directional control valve left end in Y types, opens
Pressurized strut low-temperature working cyclic program carries out working cycles at this temperature.
By taking the fluid cooling before accumulator class low-temperature working cyclic test as an example, it is tested accumulator flush cycle fast-refrigerating
Method is identical with tested pressurized strut.Tested accumulator 9 is carried out when fluid is cooled to assigned temperature, then by current technology regulation
Low-temperature working cyclic test.
The above, the preferred embodiment only invented, is not intended to limit the scope of the present invention, all in the present invention
Spirit and principle within made by all any modification, equivalent and improvement etc., should be included in the bright protection domain of the present invention
Within.
Claims (10)
1. a kind of pressurized strut class cold performance test platform hydraulic system, including from fuel tank（17）To refrigeration system（20）Fuel tank is arrived again
（17）The flush cycle system of formation, it is characterised in that：In flush cycle system, in tested pressurized strut oil inlet and outlet parallel transistor
The rodless cavity high-pressure ball valve in parallel two-by-two of the first of road（25）, rod chamber high-pressure ball valve（26）And its go the same way concatenated second two-by-two simultaneously
Join the logical oily high pressure needle valve of rodless cavity（11）, the logical oily high pressure needle valve of rod chamber（12）, pass through the O-shaped electricity of parallel transistor connection test of going the same way
Magnetic reversal valve, the experiment cooling position solenoid directional control valve in Y types of O-shaped solenoid directional control valve series connection（30）, cooling cycle connection refrigeration
System（20）, formed oil circuit where being fully cooled rod chamber and rodless cavity from cooling circuit, in the first nothing in parallel two-by-two
Rod cavity high-pressure ball valve（25）, rod chamber high-pressure ball valve（26）With the second logical oily high pressure needle valve of rodless cavity in parallel two-by-two（11）, have bar
The logical oily high pressure needle valve of chamber（12）Parallel pipeline between be parallel with unicom system temperature sensor respectively（15）Parallel pipeline
Rod chamber in parallel cools down high pressure needle valve to third two-by-two（27）, rodless cavity cool down high pressure needle valve（28）, the first rodless cavity in parallel two-by-two
High-pressure ball valve（25）, rod chamber high-pressure ball valve（26）It is connected to third rod chamber high pressure needle valve in parallel two-by-two by triple valve（27）,
Rodless cavity cools down high pressure needle valve（28）Form the channel of fluid cooling cycle；Rod chamber high pressure needle valve（27）, rodless cavity cooling it is high
Pressing valve（28）The hydraulic pressure signal of generation passes through system temperature sensor（15）It is sent into operation panel；Position electromagnetic switch in Y types
Valve（30）When for cooling cycle, by rodless cavity high-pressure ball valve（25）, rod chamber high-pressure ball valve（26）Place pipeline unicom, fully
The cooling logical oily high pressure needle valve of rodless cavity（11）With the logical oily high pressure needle valve of rod chamber（12）Place oil circuit.
2. pressurized strut class cold performance test platform hydraulic system as described in claim 1, it is characterised in that：Pressure oil port is passed through
Refrigeration system（20）The fluid and refrigeration system for flowing through refrigeration system generate heat exchange.
3. pressurized strut class cold performance test platform hydraulic system as described in claim 1, it is characterised in that：Test O-shaped electricity
Magnetic reversal valve（10）A-road-through supercooling position solenoid directional control valve in Y types（30）It is connected to refrigeration system（20）, another way passes through pipe
Road connects heat exchanger（24）With static pressure release high pressure needle valve（18）.
4. pressurized strut class cold performance test platform hydraulic system as claimed in claim 3, it is characterised in that：Heat exchanger（24）It is logical
Bypass duct on piping connects overflow valve（21）, overflow valve（21）It is connected in parallel on check valve（14）With accumulator low voltage electromagnetic ball
Valve（22）Between, accumulator low voltage electromagnetic ball valve（22）Sequentially pass through check valve（14）The logical oily high pressure needle valve of accumulator of connecting（13）
With accumulator high-pressure ball valve（29）Lead to tested accumulator（9）.
5. pressurized strut class cold performance test platform hydraulic system as described in claim 1, it is characterised in that：Test O-shaped electricity
Magnetic reversal valve（10）Pass through the logical oily high pressure needle valve of parallel cartridges rodless cavity respectively（11）Concatenated rodless cavity high-pressure ball valve（25）, have
The logical oily high pressure needle valve of rod cavity（12）Concatenated rod chamber high-pressure ball valve（26）Connection is tested pressurized strut（4）Rodless cavity and have bar
Chamber, driving rodless cavity oil inlet push pressurized strut piston rod to stretch out, and rod chamber oil inlet pushes pressurized strut piston rod to retract.
6. pressurized strut class cold performance test platform hydraulic system as described in claim 1, it is characterised in that：Experiment is in O-shaped
Position solenoid directional control valve（10）Oil return opening pass through the logical oily high pressure needle valve of rod chamber（12）The rod chamber static pressure of pipeline bypass connection is high
Pressing valve（5）, through static pressure release high pressure needle valve（18）Connect heat exchanger（24）, system oil return pipeline oil passes through rod chamber static pressure
High pressure needle valve（5）The accumulator static pressure high pressure needle valve that take over road connects by output end（8）, accumulator release high pressure needle valve（16）It returns
To fuel tank（17）.
7. pressurized strut class cold performance test platform hydraulic system as described in claim 1, it is characterised in that：Test O-shaped electricity
Magnetic reversal valve（10）A-road-through supercooling position solenoid directional control valve in Y types（30）It is connected to the refrigeration system communicated with pressure-adjustable oil sources P
System（20）, another way connects heat exchanger by pipeline（24）With static pressure release high pressure needle valve（18）, heat exchanger（24）Pass through pipeline
On bypass duct connect overflow valve（21）.
8. pressurized strut class cold performance test platform hydraulic system as described in claim 1, it is characterised in that：Accumulator low tension
Magnetic ball valve（22）Outlet sets a check valve（14）, pass through check valve（14）Side take over road parallel connection accumulator high-voltage electromagnetic ball valve
（23）, accumulator high-voltage electromagnetic ball valve（23）Input terminal is through accumulator low voltage electromagnetic ball valve（22）Input terminal and interface connection system
System pressure sensor（19）.
9. pressurized strut class cold performance test platform hydraulic system as claimed in claim 4, it is characterised in that：It is connected to accumulator
Low voltage electromagnetic ball valve（22）Outlet and check valve（14）Between side take over road on be connected with one be separately connected experiment changed with O-shaped electromagnetism
To valve（10）With static pressure release high pressure needle valve（18）, heat exchanger（24）The adjustable overflow valve of connection（21）, overflow valve（21）It is logical
The low-temp low-pressure working cycles of accumulator class product, accumulator low voltage electromagnetic ball valve are controlled to system oil return pipeline（22）, pressure accumulation
Device high-voltage electromagnetic ball valve（23）Shunt circuit controls the working cycles under accumulator class product systems pressure.
10. pressurized strut class cold performance test platform hydraulic system as described in claim 1, it is characterised in that：Accumulator high pressure
Solenoid ball valve（23）And check valve（14）Pass through the logical oily high pressure needle valve of accumulator together（13）It is connected into tested accumulator（9）, simultaneously
Pass through system temperature sensor（15）With accumulator release high pressure needle valve（16）Connect fuel tank（17）, pass through system temperature sensor
（15）Feed back oil liquid temperature.
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| CN108332954A (en) * | 2017-12-14 | 2018-07-27 | 西安益翔航电科技有限公司 | A kind of pressurized strut low temperature environment, cryogenic media experiment experimental rig |
| CN114441180B (en) * | 2020-11-02 | 2023-10-13 | 中国航发商用航空发动机有限责任公司 | Low-temperature endurance test system and test method |
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| CN102954051B (en) * | 2012-10-23 | 2014-12-10 | 中国重型机械研究院股份公司 | Accumulator system capable of automatically regulating inflation pressure |
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