CN110454470A - The central hydraulic source shared based on more hydraulic terminal device networkings and its hydraulic configuration method - Google Patents
The central hydraulic source shared based on more hydraulic terminal device networkings and its hydraulic configuration method Download PDFInfo
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- CN110454470A CN110454470A CN201910767021.9A CN201910767021A CN110454470A CN 110454470 A CN110454470 A CN 110454470A CN 201910767021 A CN201910767021 A CN 201910767021A CN 110454470 A CN110454470 A CN 110454470A
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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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
- 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
- F15B21/0423—Cooling
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/62—Cooling or heating means
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
A kind of central hydraulic source shared based on more hydraulic terminal device networkings and its hydraulic configuration method, including central pumping station, it is connected in parallel on the multiple terminal devices branch of central pumping station output end, flow sensor is arranged in each fuel feeding pump group output end of the central pumping station, each terminal device branch respectively includes sequentially connected normally closed first solenoid valve, speed governing valve, pressure reducing valve, second solenoid valve and terminal device, and the first solenoid valve of each terminal device branch is connected in parallel on the output end of the central pumping station, it is directly connect with the oil return opening of fuel tank after the oil return line confluence of each terminal device, central pumping station output end total flow is greater than the sum of the metered flow of each terminal device, the pressure of central pumping station output end is greater than the rated pressure of each terminal device；The control terminal of first and second solenoid valve of each terminal device branch, flow sensor are separately connected the input terminal of pumping plant PLC, and the output end of pumping plant PLC connects the variable-frequency motor of each fuel feeding pump group by frequency converter.
Description
Technical field
The present invention relates to the hydraulic power unit of hydraulic system, it is especially a kind of based on more hydraulic terminal device networkings share
Central hydraulic source and its hydraulic configuration method.
Background technique
In every case hydraulic system, is both needed to be equipped with pumping plant, purposes be as to hydraulic device provide rated pressure, flow it is dynamic
Power source.Hydraulic power unit is usually by hydraulic pump, fuel tank, hydraulic services (overflow valve, filter, accumulator, ball valve etc.), cooling system
Deng composition.
By configuration mode, hydraulic power unit can be divided into dedicated pumping plant sum aggregate two kinds of pumping plant.Dedicated pumping plant be a pumping plant with
One one-to-one configuration mode of hydraulic device, suitable for the condition that hydraulic device works independently, use is most universal.Its advantage is that
There is no the coupled interference of the factors such as pressure between terminal device, flow, performance is stablized.
Central pumping station is that a pumping plant provides the configuration mode of oil sources to more hydraulic terminal devices, is suitable for hydraulic device
The condition of networking work, using more under conditions of multinomial hydraulic device concentrates networking.Its advantage is that pumping plant utilization rate is high, throws
Money is few, takes up little area, low energy consumption.
Traditional central pumping station is made of the part such as oil pump group, control element, cooling device.As shown in Figure 1, the concentration pumps
It stands and uses two pieces (practical number of packages combines on demand, not specific) fuel feeding pump group 3.1~3.2 as dynamical element, fuel feeding pump group 3.1
After the two-way pressure oil of~3.2 outputs flows through high pressure filter 4.1~4.2, check valve 6.1~6.2, it is merged into all the way；Merge
Pressure oil after high pressure filter 4.3 again be divided into two-way, respectively enter two terminal device 11.1~11.2(physical end parts
Number is not on demand, specific), complete respective function.The two-way oil return of terminal device 11.1~11.2 is merged into all the way, through unidirectional
Fuel tank 1 is returned to after valve, low-pressure filter 2.3, cooler 14.Such cycle operation.Within the system, accumulator 7 absorbs hydraulic
The pressure fluctuation of system.Level-one overflow valve 5.1~5.2 is used to be respectively set the rated pressure phase of two pieces fuel feeding pump group 3.1~3.2
Deng second level overflow valve 5.3 plays safeguard protection.
It follows that there are following drawbacks for traditional central pumping station:
1, coupling, interference phenomenon are inevitable between each terminal device hydraulic system
It is reported that under prior art conditions, although the outer Lian Duotai terminal device 11.1~11.2 of central pumping station, cannot support
More terminal devices work at the same time.When terminal device 11.1 just at work, while opening/when stopping terminal device 11.2, moment produces
Raw pressure, flowed fluctuation are larger, and coupling, interference phenomenon are inevitable between each terminal device hydraulic system, so that entire pump
The system of station is unable to steady operation.If terminal device applies dynamic/static load, then the fluctuation of load is big, low precision.
2, pumping plant opens/stops control mode and cannot adaptively carry out flow matches
Traditional central pumping station is using artificial matching flow mode, it may be assumed that before use, being prejudged by operator according to flow demand
The demand number of oil pump group, the quantity for correspondingly opening/stopping the Oil pump electrical machinery group of central pumping station carries out flow add drop, so that concentrating pump
The flow demand for the total flow and terminal device that provide of standing is adapted.The control mode cannot adaptively carry out the stream of central pumping station
It is flux matched.
3, filter, cooler mounting means cause oil return resistance larger
Low-pressure filter 2.3 is arranged in traditional central pumping station on oil return line, causes oil return resistance larger；Its cooler 14
It is typically also on oil return line, this more increases oil return resistance.Its drawback is to reduce the effective of hydraulic system to make effect
Rate, and easily cause oil return resistance exceeded.
It is reported that currently, either theoretical or practice aspect, domestic central pumping station does not have that " pumping plant is opened
Open, multiple devices parallel connection share " function.Hydraulic Industry there is no the solution generally accepted to the composition and principle of central hydraulic power source
Certainly scheme.
Summary of the invention
The technical problem to be solved by the present invention is to, it overcomes the deficiencies of the prior art and provide one kind and is based on setting up hydraulic network,
It is suitable for the shared central hydraulic source of more hydraulic terminal device parallel connections.
In order to solve the above technical problems, the invention adopts the following technical scheme: a kind of be based on more hydraulic terminal device groups
The shared central hydraulic source of net, including composed in parallel by N number of fuel feeding pump group central pumping station, be connected in parallel on central pumping station output end
M terminal device branch, N, M are the natural number greater than 1, and the fuel feeding pump group is the constant displacement pump of variable-frequency motor driving, the collection
The output end of middle each fuel feeding pump group of pumping plant is respectively provided with flow sensor, and each terminal device branch respectively includes sequentially connected first
Solenoid valve, speed governing valve, pressure reducing valve, second solenoid valve and terminal device, the first and second solenoid valve is all normally close valve, and each terminal is set
First solenoid valve of standby branch is connected in parallel on the output end of the central pumping station, the oil return line of each terminal device directly with fuel tank
Oil return opening connection, the output end total flow of the central pumping station are Q0, the metered flow of each terminal device is Q1、Q2…Qm, Q0>
Q1+Q2…+Qm, the rated pressure of the fuel feeding pump group is P0, the rated pressure of each terminal device is P2、P3…Pm+1, P0> P2、
P3…Pm+1；The control terminal of first and second solenoid valve of each terminal device branch, each flow sensor are separately connected pumping plant PLC
Input terminal, the output end of the pumping plant PLC connects the variable-frequency motor of each fuel feeding pump group by frequency converter.
The present invention at least has following three different compared with prior art:
1, the selection of flow is different from matching way
The pressure oil of central pumping station output end of the present invention will first pass through the first normally closed electromagnetism before entering each terminal device
Valve, when the moment for opening/stopping the first solenoid valve, the signal that opens/stop of the first solenoid valve is sent to pumping plant PLC, presses pre-terminated by pumping plant PLC
Enter the flow configuration of each fuel feeding pump group of metered flow adjust automatically central pumping station of terminal device, and by each fuel feeding pump group output end
The flow sensor real-time monitoring fuel feeding pump group output end rate of discharge, and be sent to pumping plant PLC and add up, calculate collection
The output end total flow of middle pumping plant, pumping plant PLC make comparisons the output end total flow of central pumping station with aggregate demand flow, go forward side by side one
Step passes through the variable-frequency motor revolving speed (add drop fuel feeding pump group number when necessary) of frequency converter adjust automatically fuel feeding pump group, to adapt to each end
The total flow demand of end equipment.In this way, the present invention automatically configures central pumping station output end flow according to the aggregate demand of terminal device,
So that the flow demand of each terminal device is consistent with the fuel supply flow rate of central pumping station, closed-loop control is realized automatically.
2, it is mutually shielded between the hydraulic system of each terminal device, no coupling, interference phenomenon.
In prior art condition, though there is the case where outer Lian Duotai terminal device of central pumping station works at the same time, such as static(al), fatigue
Coordinated multi-point loads in test, but more terminal devices are servo valve loading method in the prior art, and this mode is to terminal
The Hydraulic Elements of equipment configure and contamination level of oil liquid requires height, do not have versatility.
Also there is central pumping station to connect the reality of terminal device by bang-bang control valve or discrete control valve in the prior art
Apply mode, but this connection type does not support more terminal devices to work at the same time, especially when first terminal device just at work,
When opening/stop second terminal device simultaneously, the pressure of moment generation, flowed fluctuation are larger, coupled between each terminal device hydraulic system,
Interference phenomenon is inevitable, prevent entire pumping station system is from steady operation.
The first solenoid valve is arranged in the front end of terminal device branch of the invention, and speed governing valve is arranged later and carries out flow and pressure
It adjusts.Speed governing valve is selected herein rather than throttle valve, its advantage is that speed governing valve is taken into account, flow is adjusted and pressure is adjusted, so that terminal is not
It is influenced by load variation, terminal device operating rate is kept to stablize.After speed governing valve, pressure oil enters pressure reducing valve, decompression
Hydraulic oil is further adjusted to the rated pressure of terminal device by valve, using check valve, by the storage in parallel with second solenoid valve
After the energy further pressure stabilizing of device, it is configured with pressure and flow on demand for terminal device, provides necessary operating condition, finally
Opening normally closed second solenoid valve can be to terminal device supply hydraulic fluid.The unlatching of the first solenoid valve is used for as eventually in the present invention
End equipment provides necessary operating condition, is the operating upstream of second solenoid valve, and the starting of the first solenoid valve indicates central pumping station pair
Terminal device is ready；First solenoid valve is closed, and indicates that central pumping station shuts down end to terminal device.Second solenoid valve is eventually
Directly opening/stop for end equipment operates, and is the downstream process of the first solenoid valve, indicates that terminal device is in work or closed state.
First and second solenoid valve completes the electrichydraulic control to terminal device jointly.
3, central pumping station has been carried out Combined design, integrated cloth with each terminal device by the present invention in terms of principle and composition
It sets.
The present invention with the demand of terminal device be guiding, by central pumping station be terminal equipment configuration rated pressure, flow,
It opens/stops the setting of protection level, oil liquid cooling and filter the aggregate measures such as integrated configuration, terminal device is reduced to functional module.
For terminal device, only need to by the necessary subsystem of its functional configuration can, without consider pressure, flow, oil liquid
The periphery such as temperature, oil filtrating work system, has thus reached central pumping station and the Combined design of terminal device, integrated cloth
It sets.
4, fuel feeding pump group of the present invention is the combination of constant displacement pump (clino-axis type high-pressure plunger pump) and variable-frequency motor.Its flow
Adjustment mode is: carrying out the flow of control oil pump group by adjusting the revolving speed of variable-frequency motor.It reorders with variable pump the combination of speed motor
Mode is compared, the advantage is that: variable-frequency motor adjustment pump group flow is carried out under conditions of hydraulic system pressure is constant, no
The influence of pressure oscillation can be generated to terminal device.And the flow adjustment between variable pump influences pressure perseverance with pressure oscillation
It is fixed.
Further, the periphery configuration oil liquid cooling filtering device of the central pumping station, terminal device branch.The oil liquid
Cooling filtering device includes the cooling oil pump group that hydraulic input terminal is connect with fuel tank, and the hydraulic output end of cooling oil pump group is through thick mistake
Filter, fine filter, cooler connect fuel tank.In this way, oil filtrating and cooling two functions of oil temperature are integrated arrangement by the present invention,
When work, cooling oil pump group is opened, and hydraulic oil successively passes through coarse filter, fine filter, enters back into cooler, in cooler
In, external room temperature cooling water circulates, and carries out heat exchange to the high-temperature oil liquid of fuel tank, takes away high temperature heat, reach cooling
Function.Compared with traditional central pumping station is by oil filtrating and the cooling mode being arranged on main line of oil temperature, its advantage is that
The oil return resistance for reducing central hydraulic source improves the efficiency of hydraulic energy acting.
Further, level-one overflow valve, the output end setting of the central pumping station is arranged in the output end of the fuel feeding pump group
Second level overflow valve, and the pressure set points of level-one overflow valve are the rated pressure P of fuel feeding pump group0, the pressure of second level overflow valve sets
Definite value is P1, P1- P0=0.5 ~ 1MPa.The level-one overflow valve is proportional pressure control valve, and end is arranged in the pressure of proportional pressure control valve
Connect the output end of the pumping plant PLC.It is set with two layers of meaning in this way:
First layer is meant that: level-one overflow valve is used to set the rated pressure P of fuel feeding pump group0；Second level overflow valve is protected for safety
Shield effect.In central pumping station, the rated pressure P of each fuel feeding pump group outlet0Constant and numerical value is equal, each terminal device it is specified
Pressure P2、P3…Pm+1The respectively less than rated pressure P of pumping plant0, it may be assumed that P0> P2、P3…Pm+1。
The second layer is meant that: level-one overflow valve uses proportional pressure control valve, when opening/stop fuel feeding pump group, the pressure of proportional pressure control valve
Power setting is controlled by pumping plant PLC, so that can be opened under zero-pressure/stop oil pump, avoid compression shock from damaging oil pump.
Further, the output end of the central pumping station and the input terminal of second solenoid valve are separately connected accumulator, with into
The pressure of one step stabilizing solution pressure oil.
Based on the same inventive concept, it above-mentioned is shared based on more hydraulic terminal device networkings the present invention provides a kind of
Entreat the hydraulic configuration method of hydraulic power source comprising:
The rated pressure and metered flow of each terminal device are prestored in pumping plant PLC；
When first terminal equipment works under the hydraulic oil effect for the metered flow and rated pressure that the first fuel feeding pump group provides, the
When two terminal devices need to work at the same time, pumping plant PLC detects the enabling signal of second terminal equipment, and controls the first oil feed pump
The variable-frequency motor of group increases revolving speed, so that the output flow of central pumping station is greater than the sum of the metered flow of the first and second terminal device, together
When, the output flow of each each fuel feeding pump group of flow sensor real-time detection, and be sent to pumping plant PLC and add up, it calculates and concentrates
The output end total flow of pumping plant cannot still make central pumping station if the variable-frequency motor revolving speed of the first fuel feeding pump group reaches maximum value
Output end total flow be greater than the first and second terminal device the sum of metered flow, then open the second fuel feeding pump group, until concentrate pump
The output end total flow stood is greater than the sum of the metered flow of the first and second terminal device；So constantly adjusts and open new fuel feeding
Pump group, until the output end total flow of central pumping station is greater than the sum of the metered flow of required starting terminal device；
When first terminal equipment is working, and second terminal equipment needs to shut down, pumping plant PLC detects stopping for second terminal equipment
Stop signal, and the variable-frequency motor for controlling the first fuel feeding pump group reduces revolving speed, and the output end total flow of central pumping station is made to be greater than first
The metered flow of terminal device, meanwhile, the output flow of each each fuel feeding pump group of flow sensor real-time detection, and it is sent to pumping plant
PLC adds up, and calculates the output end total flow of central pumping station, if the variable-frequency motor revolving speed for reducing the first fuel feeding pump group still cannot
When reaching the metered flow of first terminal equipment, the variable-frequency motor that pumping plant PLC controls the second fuel feeding pump group stops working, until collection
The output end total flow of middle pumping plant is greater than the metered flow of first terminal equipment；So constantly adjusts and close new oil feed pump
Group, until the output end total flow of central pumping station is greater than the sum of the metered flow of required starting terminal device.
Further, the fuel feeding pump group opens the/stopping time, first by the pressure of its corresponding proportional pressure control valve by rated value gradually
It is down to 0, to avoid the pressure difference impact failure oil pump generated suddenly.
Further, when the terminal device starts, the first solenoid valve of its counterpart terminal equipment branch road is first opened, and
Flow is adjusted to equal with the metered flow of the terminal device by speed governing valve, by pressure reducing valve pressure is adjusted to later and
The rated pressure of the terminal device is equal, finally opens second solenoid valve.In this way, ensuring that each terminal device in volume
Constant flow and the lower starting of the hydraulic oil of rated pressure effect, when other terminal devices being avoided to start caused by instantaneous pressure, flow
Fluctuation avoids coupling, interference phenomenon between each terminal device hydraulic system.
Compared with the prior art, the advantages of the present invention are as follows:
The present invention has carried out technological innovation to traditional central pumping station, mainly using adaptive pumping plant flow matches technology, to end
The technologies such as the constant flow constant pressure control of end equipment, under the conditions of foring various factors coupling, each terminal device and central pumping station collection
At networking, central hydraulic source technology is formd, its advantage is that: central pumping station not only provides specified pressure current to terminal device
Amount, and pumping plant is subjected to function with the terminal device of each branch and is merged, modular terminal device is imbedded into central pumping station, group
It shared at multiple terminals parallel connection, resistance to crosstalk, shield strong central hydraulic source network, and have adaptive progress pumping plant flow matches
Ability, thus the present invention is to improve the reliability of hydraulic power unit, expand capacity of equipment, improve service performance, improve service efficiency
Aspect has played positive effect.
Detailed description of the invention
Fig. 1 is the hydraulic principle schematic diagram of existing typical central pumping station.
Fig. 2 is the hydraulic principle of one embodiment of central hydraulic source shared the present invention is based on more hydraulic terminal device networkings
Schematic diagram.
Fig. 3 is that (arrow indicates that the input of pumping plant PLC and each section, output are closed to control system schematic diagram of the invention in figure
System).
In figure: 1. fuel tanks；2.1~2.3. low-pressure filter；3.1~3.2. oil pump group；3.3 cooling oil pump groups；4.1~
4.2. high pressure filter；4.4. coarse filter；4.5. fine filter；5.1~5.2. level-one overflow valve；5.3. second level overflow valve；
5.4~5.5. proportional pressure control valve；6.1~6.4. check valve；7. accumulator；7.1~7.3. accumulator；The first electricity of 8.1~8.2.
Magnet valve；8.3~8.4. second solenoid valve；9.1~9.2. speed governing valve；10.1~10.2. pressure reducing valve；11.1~11.2. terminal is set
It is standby；12.1~12.2. flow sensor；13. oil liquid cooling filtering device；14. cooler.
Specific embodiment
Below in conjunction with specific preferred embodiment, the invention will be further described, but not thereby limiting the invention
Protection scope.
For ease of description, the description of the relative positional relationship (such as: upper and lower, left and right) of each component is according to explanation
Restriction effect is not played to the structure of this patent come what is be described in the Butut direction of book attached drawing.
Embodiment 1:
As shown in Fig. 2, the present invention is based on the hydraulic pressure systems that more hydraulic terminal device networkings share to unify embodiment, including with fuel tank
The central pumping station of connection, the multiple terminal devices branch for being connected in parallel on central pumping station output end and setting are in central pumping station and multiple ends
The oil liquid cooling filtering device 13 of end equipment branch periphery.
Using two pieces fuel feeding pump group 3.1~3.2, as dynamical element, (practical number of packages combines central pumping station on demand, not special
It is fixed), through low-pressure filter 2.1~2.2 from 1 oil suction of fuel tank, the two-way pressure oil that fuel feeding pump group 3.1~3.2 exports is pressed through through height
Central pumping station output end is merged into after filter 4.1~4.2, flow sensor 12.1~12.2, check valve 6.1~6.2.Height presses through
The output end Set scale overflow valve 5.4~5.5 of filter 4.1~4.2 is used as level-one overflow valve, central pumping station output end and accumulation of energy
Device 7.1 connects, and second level overflow valve 5.3 is arranged between central pumping station output end and fuel tank 1.In this process, proportional pressure control valve 5.4
~5.5 are respectively set the rated pressure P of two pieces fuel feeding pump group 3.1~3.20, the pressure set points P of second level overflow valve 5.31Compare P0
High 0.5 ~ 1MPa, plays safeguard protection；The pressure fluctuation of the absorption central pumping station output end of accumulator 7.1；Flow sensor
The actual flow of 12.1~12.2 real-time measurement fuel feeding pump group, 3.1~3.2 output end, and be sent to pumping plant PLC and add up, it calculates
The output end total flow of central pumping station out.Fuel feeding pump group 3.1~3.2 is selected constant displacement pump (clino-axis type high-pressure plunger pump) respectively and is become
The combination of frequency motor, flow adjustment mode is: adjusting the flow of fuel feeding pump group by changing the revolving speed of variable-frequency motor.
Terminal device branch includes that the practical number of packages of 8.1~8.2(of sequentially connected first solenoid valve combines on demand, not special
Calmly), speed governing valve 9.1~9.2, pressure reducing valve 10.1~10.2, second solenoid valve 8.3~8.4 and terminal device 11.1~11.2.Collection
The pressure oil of middle pumping plant output end respectively through the first solenoid valve 8.1~8.2, speed governing valve 9.1~9.2, pressure reducing valve 10.1~10.2,
Enter terminal device 11.1~11.2 after check valve 6.3~6.4, second solenoid valve 8.3~8.4.Terminal device 11.1~11.2
Two-way oil return line merge into a total oil return line, and connect through check valve with fuel tank 1.So carry out cycle operation.
Oil liquid cooling filtering device 13 is configured with the cooling oil pump group 3.3 that connect with fuel tank 1, cooling oil pump group 3.3 it is defeated
Outlet sequence setting coarse filter 4.4, fine filter 4.5 and cooler 14, the oil liquid that cooling oil pump group 3.3 is got, by thick
After filter 4.4,4.5 double-filtration of fine filter, it is cooling that oil liquid is carried out into cooler 14.The advantage that: 1, it simplifies
Equipment composition, reduces equipment occupation space, improves the efficiency of oil liquid cold filtration；2, the mistake on total oil return line is omitted
Filter advantageously reduces oil return resistance.
As shown in figure 3, the control terminal of the first and second solenoid valve, flow sensor connect pump through Ethernet respectively in the present invention
It stands the input terminal of PLC, the output end of pumping plant PLC connects the variable-frequency motor of each fuel feeding pump group, each terminal device by frequency converter
11.1~11.2 carry out data exchange through industrial switch and pumping plant PLC.Pumping plant PLC is the SIEMENS PLC of model S7-1515.
Pumping plant PLC is to the opening/stop of each fuel feeding pump group 3.1 ~ 3.2, low-pressure filter 2.1 ~ 2.3, high pressure filter 4.1 ~ 4.2, coarse filtration
Device 4.4, the blocking of fine filter 4.5, liquid level transfinites, oil temperature transfinites etc. is acquired, and pressure, flow, oil liquid temperature are believed
The host computer for number being uploaded to each terminal device 11.1 ~ 11.2 is shown.Pumping plant PLC and inverter communication, by frequency converter frequency
Change adjust the revolving speed of fuel feeding pump group variable-frequency motor, and then adjust the flow of each fuel feeding pump group 3.1 ~ 3.2.
The present invention is in use, the pressure oil of central pumping station output end before entering each terminal device, will first pass through normal
The first solenoid valve 8.1~8.2 closed.When the moment for opening/stopping the first solenoid valve 8.1~8.2, the first solenoid valve 8.1~8.2
It opens/stops signal and be sent to pumping plant PLC, while 12.1 ~ 12.2 real-time monitoring of flow sensor, two fuel feeding pump groups 3.1 ~ 3.2 export
The flow at end, by pumping plant PLC by the stream of the metered flow adjust automatically fuel feeding pump group 3.1~3.2 of terminal device 11.1~11.2
Amount configuration.Pumping plant PLC is cumulative by the measured discharge of flow sensor 12.1 ~ 12.2, calculates the output end total flow of central pumping station
Q0, make comparisons with the sum of the preset metered flow of terminal device 11.1~11.2, and feed back to pumping plant PLC, pumping plant PLC according to than
Relatively result issues instructions to frequency converter, (necessary by the variable-frequency motor revolving speed of frequency converter adjust automatically fuel feeding pump group 3.1~3.2
When add drop fuel feeding pump group number), to adapt to the total flow demand of each terminal device.
For example: terminal device 11.1 is in running order in Fig. 2, and demand volume is A liters/min, is provided by fuel feeding pump group 3.1
The flow.When terminal device 11.2 needs to work at the same time, start the first solenoid valve 8.2, the starting letter of first solenoid valve 8.2
Number it is sent to pumping plant PLC, increases the variable-frequency motor of fuel feeding pump group 3.1 by revolving speed, flow on total output circuit is made to be greater than (A+
) liter/min B (note: the metered flow of terminal device 11.1 is A；The metered flow of terminal device 11.2 is B), by each fuel feeding pump group
The output flow of each fuel feeding pump group of 12.1 ~ 12.2 real-time detection of flow sensor of output end, and be sent to pumping plant PLC carry out it is tired
Add, calculates the output end total flow Q of central pumping station0, pumping plant PLC is by the output end total flow Q of central pumping station0With terminal device
The sum of 11.1~11.2 metered flow is made comparisons, and according to circumstances adjustment in real time.When the variable-frequency motor for improving fuel feeding pump group 3.1
When revolving speed is still not enough to reach the flow of (A+B) liter/min, pumping plant PLC starts fuel feeding pump group 3.2 and supplements flow, makes central pumping station
Output end total flow be greater than (A+B) liter/min, realize the closed-loop control of flow.When starting, the ratio in 3.2 exit of fuel feeding pump group
The pressure of example overflow valve 5.2 is first adjusted to 0, after variable-frequency motor normal operation, then edges up to rated pressure P0.It is opened under zero-pressure
Dynamic fuel feeding pump group 3.2, the purpose protection oil pump done so, avoids instantaneous pressure difference excessive.
When terminal device 11.1 is still working, and terminal device 11.2 needs to shut down, the first solenoid valve 8.2 is closed, it should
The signal that opens/stop of first solenoid valve is sent to pumping plant PLC, reduces the frequency converter of fuel feeding pump group 3.1 by revolving speed, makes its flow
A liters/min is dropped to, by flow sensor 12.1 ~ 12.2 real-time detection flow Q of each fuel feeding pump group output end1、Q2, and be sent to
Pumping plant PLC adds up, and calculates the output end total flow Q of central pumping station0, pumping plant PLC is by the output end total flow Q of central pumping station0
It is compared with A liters/min of flow of 11.1 demand of terminal device, adjusts in real time；It is still not enough to when frequency converter reduces motor speed
When reaching A liters/min of flow, pumping plant PLC shuts down fuel feeding pump group 3.2 and further decreases flow, keeps the output end of central pumping station total
Flow meets the requirements, and realizes the closed-loop control of flow.When shutting down, the pressure of the proportional pressure control valve 5.2 in 3.2 exit of fuel feeding pump group
First gradually it is down to 0, then power failure machine.Oil feed pump group 3.2 is shut down under zero-pressure, purpose is equally protection oil pump.
The present invention when it is implemented, can be adjusted as follows:
1, about combination, fuel feeding pump group shown in Fig. 2 and terminal device are respectively two, but are not limited to when actual implementation
This can be 2 or N platform fuel feeding pump groups corresponding 2 or M platform terminal device (N, M are the natural number greater than 1), and combination is pressed
Shown in Fig. 2.
2, about flow set, the output end total flow of central pumping station is set as Q0, each terminal device shunt volume is Q1、
Q2…Qn, then, Q0It should be greater than the sum of each terminal device shunt volume, it may be assumed that Q0> Q1+Q2…+Qm。
3, it is arranged about pressure, sets the rated pressure of central pumping station output end as P0, the rated pressure of each terminal device
For P2、P3…Pm+1, then, P0It should be greater than the rated pressure of each terminal device, it may be assumed that P0> P2、P3…Pm+1。
The above is only the preferred embodiment of the application, not does any type of limitation to the application, although this Shen
Please disclosed as above with preferred embodiment, however not to limit the application, any person skilled in the art is not taking off
In the range of technical scheme, a little variation or modification are made using the technology contents of the disclosure above and is equal to
Case study on implementation is imitated, is belonged in technical proposal scope.
Claims (9)
1. it is a kind of based on more hydraulic terminal device networkings share central hydraulic source, including by N number of fuel feeding pump group (3.1~
3.2) central pumping station that composes in parallel, M terminal device branch for being connected in parallel on central pumping station output end, N, M are the nature greater than 1
Number, which is characterized in that the fuel feeding pump group be variable-frequency motor driving constant displacement pump, the central pumping station fuel feeding pump group (3.1~
3.2) output end is respectively set flow sensor (12.1~12.2), and each terminal device branch respectively includes sequentially connected first
Solenoid valve (8.1~8.2), speed governing valve (9.1~9.2), pressure reducing valve (10.1~10.2), second solenoid valve (8.3~8.4) and end
End equipment, the first and second solenoid valve is all normally close valve, and the first solenoid valve of each terminal device branch is connected in parallel on the central pumping station
Output end, each terminal device oil return line confluence after directly connect with the oil return opening of fuel tank, the output of the central pumping station
End total flow is Q0, the metered flow of each terminal device is Q1、Q2…Qm, Q0> Q1+Q2…+Qm, the specified pressure of the fuel feeding pump group
Power is P0, the rated pressure of each terminal device is P2、P3…Pm+1, P0> P2、P3…Pm+1；The of each terminal device branch
One, the control terminal of two solenoid valves, each flow sensor are separately connected the input terminal of pumping plant PLC, and the output end of the pumping plant PLC is logical
Cross the variable-frequency motor that frequency converter connects each fuel feeding pump group.
2. the central hydraulic source according to claim 1 shared based on more hydraulic terminal device networkings, which is characterized in that
The periphery configuration oil liquid cooling filtering device (13) of the central pumping station, terminal device branch.
3. the central hydraulic source according to claim 1 shared based on more hydraulic terminal device networkings, which is characterized in that
The oil liquid cooling filtering device includes the cooling oil pump group (3.3) that hydraulic input terminal is connect with fuel tank, the liquid of cooling oil pump group
Output end is pressed to connect fuel tank through coarse filter (4.4), fine filter (4.5), cooler (14).
4. the central hydraulic source according to claim 1 shared based on more hydraulic terminal device networkings, which is characterized in that
Level-one overflow valve is arranged in the output end of the fuel feeding pump group, and second level overflow valve, and level-one is arranged in the output end of the central pumping station
The pressure set points of overflow valve are the rated pressure P of fuel feeding pump group0, the pressure set points of second level overflow valve are P1, P1- P0=
0.5~1MPa。
5. the central hydraulic source according to claim 4 shared based on more hydraulic terminal device networkings, which is characterized in that
The level-one overflow valve is proportional pressure control valve, and the pressure setting end of proportional pressure control valve connects the output end of the pumping plant PLC.
6. the central hydraulic source according to claim 1 shared based on more hydraulic terminal device networkings, which is characterized in that
The output end of the central pumping station and the input terminal of the second solenoid valve are separately connected accumulator.
7. the liquid in the central hydraulic source shared described in a kind of any one of claim 1-6 based on more hydraulic terminal device networkings
Press configuration method, characterized by comprising:
The rated pressure and metered flow of each terminal device are prestored in pumping plant PLC；
When first terminal equipment works under the hydraulic oil effect for the metered flow and rated pressure that the first fuel feeding pump group provides, the
When two terminal devices need to work at the same time, pumping plant PLC detects the enabling signal of second terminal equipment, and controls the first oil feed pump
The variable-frequency motor of group increases revolving speed, so that the output flow of central pumping station is greater than the sum of the metered flow of the first and second terminal device, together
When, the output flow of each each fuel feeding pump group of flow sensor real-time detection, and be sent to pumping plant PLC and add up, it calculates and concentrates
The output end total flow of pumping plant cannot still make central pumping station if the variable-frequency motor revolving speed of the first fuel feeding pump group reaches maximum value
Output end total flow be greater than the first and second terminal device the sum of metered flow, then open the second fuel feeding pump group, until concentrate pump
The output end total flow stood is greater than the sum of the metered flow of the first and second terminal device；So constantly adjusts and open new fuel feeding
Pump group, until the output end total flow of central pumping station is greater than the sum of the metered flow of required starting terminal device；
When first terminal equipment is working, and second terminal equipment needs to shut down, pumping plant PLC detects stopping for second terminal equipment
Stop signal, and the variable-frequency motor for controlling the first fuel feeding pump group reduces revolving speed, and the output end total flow of central pumping station is made to be greater than first
The metered flow of terminal device, meanwhile, the output flow of each each fuel feeding pump group of flow sensor real-time detection, and it is sent to pumping plant
PLC adds up, and calculates the output end total flow of central pumping station, if the variable-frequency motor revolving speed for reducing the first fuel feeding pump group still cannot
When reaching the metered flow of first terminal equipment, the variable-frequency motor that pumping plant PLC controls the second fuel feeding pump group stops working, until collection
The output end total flow of middle pumping plant is greater than the metered flow of first terminal equipment；So constantly adjusts and close new oil feed pump
Group, until the output end total flow of central pumping station is greater than the sum of the metered flow of required starting terminal device.
8. the hydraulic configuration side in the central hydraulic source shared according to claim 7 based on more hydraulic terminal device networkings
Method, which is characterized in that the fuel feeding pump group opens the/stopping time, first gradually drops the pressure of its corresponding proportional pressure control valve by rated value
To 0.
9. the hydraulic configuration side in the central hydraulic source shared according to claim 7 based on more hydraulic terminal device networkings
Method, which is characterized in that when the terminal device starts, first open the first solenoid valve of its counterpart terminal equipment branch road, and lead to
It crosses speed governing valve to adjust flow to equal with the metered flow of the terminal device, is later adjusted to pressure and this by pressure reducing valve
The rated pressure of terminal device is equal, finally opens second solenoid valve.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727813A (en) * | 2020-11-19 | 2021-04-30 | 宣化钢铁集团有限责任公司 | Parallel operation pump set and use method |
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| CN110454470B (en) | 2021-01-01 |
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