CN209157021U - Accumulator flow and Pressure behaviour compensation control system - Google Patents
Accumulator flow and Pressure behaviour compensation control system Download PDFInfo
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- CN209157021U CN209157021U CN201821674387.9U CN201821674387U CN209157021U CN 209157021 U CN209157021 U CN 209157021U CN 201821674387 U CN201821674387 U CN 201821674387U CN 209157021 U CN209157021 U CN 209157021U
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Abstract
The utility model discloses accumulator flows and Pressure behaviour compensation control system, valve block is controlled including several mesohigh accumulators and accumulator, mesohigh accumulator includes several oil tanks and gas tank, tank outlet pipeline is directly connected to accumulator control valve block, and accumulator controls the compensating flowrate of valve block control oil tank output.Accumulator and accumulator control valve block can be by hydraulic press technical load curves, pass through the output of the motor-driven flow of high frequency sound proportional valve control oil tank, in a cycle period, the power dynamic compensation oil pump direct drive system flow needed for mesolow load stage for storing accumulator, so that master cylinder is reached defined operating rate requirement, and can be used as the pilot control oil sources of entire hydraulic system.Installation general power needed for each hydraulic press individually establishes pumping plant is greatly reduced in the utility model, and the idle or few function of accumulator is effectively reduced and consumes, improves operational efficiency, substantially reduces hydraulic system buying expenses, reduce project investment and production run cost.
Description
Technical field
The utility model relates to accumulator flows and Pressure behaviour compensation control system, belong to metal forming hydraulic press
Technical field.
Background technique
Hydraulic drive pumping plant is the power source of large-scale stamp forging hydraulic press, is the most important technology heart of equipment.When work, liquid
The huge power and operating rate that compressor operation cylinder issues are passed out by hydraulic power unit.Therefore, hydraulic power unit is had
Pressure energy and flow and power consumption, it is necessary to meet the characteristic requirements of various processes and the economy of equipment operation
It is required that.
Currently, Hydraulic Power Transmission System used by large-scale stamp forging hydraulic press, generally there is following two ways:
Traditional water pump-accumulator transmission system, when heavy reduction, can only generate 90% rated pressure, and pressure adjustment is tired
Difficulty, press stroke control accuracy difference, pressing speed are difficult to automatically adjust, and production technology characteristic is poor；Though the installed power of pump is lower,
But efficiency is lower than 74%, no matter payload size, each impulse stroke all consumes total power, and gross efficiency is low, and energy consumption is higher.For spy
Large-scale stamp forging hydraulic press then needs to increase working cylinder due to the limitation that ultra-high pressure high flow water pump and high pressure accumulator are applied
Area, or take supercharging technology.
Oil pump direct drive system can expire pressure continuous work, and pressing speed automatic control performance is good, the control of press stroke
Precision is high, and the efficiency of pump is greater than 93%, and compared with water pump-accumulator, low energy consumption 30%, and production technology characteristic adaptation is fine；But the dress of pump
Machine power is very high, 60 is reached if a 500MN stamp forging hydraulic press only the main pump quantity of 42MPa pressure, a 800MN die forging
The main pump quantity of hydraulic press reaches 68, also has 30 high pressure turbochargers, and pipe-line system is complicated, and pumping plant is built very huge
Greatly.The installed power of two hydraulic press main pumps is respectively in 24000kW and 27000kW or more.So high installed power, Homes Using TV
It is but very low with operational efficiency, cause project investment increase and production run cost to improve.
Utility model content
To solve the above problems, the utility model discloses a kind of accumulator flows and Pressure behaviour compensation control
System processed is as follows for large-scale stamp forging hydraulic press oil pump and accumulator hybrid-power hydraulic transmission system, specific technical solution:
Accumulator flow and Pressure behaviour compensation control system, including several mesohigh accumulators and accumulator control valve
Block, the mesohigh accumulator include several oil tanks and gas tank, and tank outlet pipeline is directly connected to accumulator control valve block,
Accumulator controls the compensating flowrate of valve block control oil tank output；
The accumulator control valve block includes high frequency sound proportioning valve, reversal valve, lowest liquid level valve, guide's two-stage pressure overflow
Valve, pressure reducing valve and manual gate valve, the output of the motor-driven flow of the high frequency sound proportional valve control oil tank；The reversal valve control is super
High-pressure plunger variable pump group operates in a cycle period to the repairing of oil tank, is allowed to restore the power of storage；It is described minimum
Liquid elevating valve is responsible for security control of the oil tank in minimum oil level；The operating pressure of guide's two-stage pressure overflow valve control oil tank
Conversion；The pressure reducing valve maintains pilot control oil sources of the pressure oil of oil tank as entire hydraulic system；Manually by several
The switching of gate valve successively connects oil tank oil circuit with the kicker cylinder of corresponding Main cylinder, being capable of hand under forced outage state
It is dynamic to realize mold die sinking and backhaul.
The mesohigh accumulator further includes the scene PSA nitrogen gas generating system, is mesohigh accumulator by the scene PSA nitrogen gas generating system
Oil tank and gas tank pressurising for the first time, and be allowed to store power.
Using the large-scale stamp forging hydraulic press hybrid-power hydraulic of above-mentioned accumulator flow and Pressure behaviour compensation control system
Transmission system, further include several super-pressure plunger variable pump groups, matrix form multiple-channel output integrated control valve block, low-pressure reservoir,
No pressure fuel tank, inflation system, the circulatory system and Duo Tai hydraulic press several master cylinders and auxiliary cylinders control valve block,
The master cylinder and auxiliary cylinders control valve block pass through pipeline and matrix form multiple-channel output integrated control valve block respectively, and super
High-pressure plunger variable pump group controls valve block with accumulator and mesohigh accumulator connects, the output of master cylinder and auxiliary cylinders control valve block
Pipeline is connected respectively to the master cylinder or auxiliary cylinders of controlled hydraulic press,
The super-pressure plunger variable pump group includes several variable pumps, the low-pressure reservoir to every variable oil pump feed and
For the master cylinder filling liquid of each hydraulic press, every variable pump discharge configures a check valve, and it is defeated to be respectively independently connected to matrix form multichannel
Integrated control valve block out；
Matrix form multiple-channel output integrated control valve block is used to control super-pressure plunger variable pump group and mesohigh accumulator
Flow is output and input；
Low-pressure reservoir is connect with inflation system and the circulatory system, and the gas in low-pressure reservoir is filled with or discharged by inflation system
Body pressure realizes heating, cooling and the filtration cycle of low-pressure reservoir by the circulatory system.
In the matrix form multiple-channel output integrated control valve block, the isolating valve of every longitudinal rows be respectively every variable pump and
Mesohigh accumulator provides input duct, and each input duct is respectively arranged with guide and recycles overflow valve；
It is respectively each independent master cylinder and auxiliary per horizontally-arranged isolating valve in matrix form multiple-channel output integrated control valve block
Cylinder controls valve block and provides the delivery channel of flow, and each delivery channel is respectively arranged with pipeline pressure release valve, makes to lead to each master cylinder
It being capable of independent pressure release with the pipeline of auxiliary cylinders control valve block and all variable pumps；
The input duct of every file is with corresponding horizontally-arranged delivery channel by isolating valve connection, and every road delivery channel is individually
It is connected to corresponding master cylinder and auxiliary cylinders control valve block.
Large-scale stamp forging hydraulic press hybrid-power hydraulic transmission system further includes no pressure fuel tank, and the no pressure fuel tank is used for
The internal leakage oil of super-pressure plunger variable pump group and master cylinder and auxiliary cylinders control valve block is collected, and after filtering by clean oil liquid
Back to low-pressure reservoir.
The low-pressure reservoir selects 0.3-0.5MPa pressure oil tank.
The working principle of the utility model is:
The utility model is applied in large-scale stamp forging hydraulic press hybrid-power hydraulic transmission system, when operating pressure is less than
25MPa, when speed is 25-30mm/s, by super-pressure plunger variable pump group oil pump power direct-drive；When operating pressure is greater than
25MPa is less than 32MPa, when speed is 50-60mm/s, by super-pressure plunger variable pump group oil pump power direct-drive, with
Mesohigh accumulator stores power and carries out dynamic compensation；When operating pressure is greater than 32MPa, less than 42MPa, speed 20-30mm/
When s, by super-pressure plunger variable pump group oil pump power direct-drive；Die forging operating condition after prefabricated blank, by super-pressure plunger variable
Pump group oil pump power direct-drive carries out dynamic compensation by mesohigh accumulator storage power, and final shaping stage is by super-pressure
Plunger variable pump group oil pump power direct-drive；The master cylinder of each auxiliary cylinders of one of hydraulic press and other hydraulic presses by
Super-pressure plunger variable pump group oil pump power direct-drive.
The beneficial effects of the utility model are:
(1) the characteristics of the utility model is according to multidirectional double acting compound hot extrusion process and contour forging technique, has drawn existing transmission
The advantages of system, the shortcomings that having evaded them, under the premise of fully meeting technique force-power parameter, a process cycles period
Interior, joint pumping plant can be more hydraulic press fuel feeding by technique load curve in different periods, and each hydraulic press can be greatly reduced
Installation general power needed for individually establishing pumping plant is effectively reduced the idle or few function of accumulator and consumes, improves operational efficiency, can be significant
Hydraulic system buying expenses are reduced, project investment and production run cost are reduced.
(2) when the liquid supply rate of pump direct drive accounts for about 50%, it can satisfy the flow of each 50% maximum operating speed of master cylinder
It needs, fully meets the flow needs of each master cylinder lost motion and other all cylinder maximum operating speeds.Accumulator compensation supplies
50% shared by liquid measure, dynamic flow compensation when can be used for master cylinder middle pressure can be adjusted to 25MPa according to process requirement
With two kinds of pressure rank work of 32MPa, it is also used as oil pump-accumulator transmission.
(3) using multidirectional double acting compound hot extrusion process and direct contour forging technique when, within 85% period, filling or upsetting
Thick load is less than 50% maximum load, using the 25MPa pressure rank of about 42MPa maximum working pressure 50%, directly passes with pump
The dynamic feed flow into cylinder together.The accumulator pressure rate of rise is fast, and energy can be made full use of, meanwhile, 50% is compensated for master cylinder
Liquid supply rate reaches maximum operating speed requirement.When load pressure is more than 25MPa, accumulator stops feed flow, by pumping with 50% most
The flow direct-drive of big operating rate, until work terminates.
(4) it using when contour forging technique, mold one contacts base, and quickly, curring time is shorter for upper pressure after prefabricated blank, uses
32MPa pressure rank, together with pump direct drive into cylinder feed flow.Accumulator energy can be made full use of, meanwhile, to master cylinder
50% liquid supply rate is compensated for, maximum operating speed requirement is reached.When load pressure is more than 32MPa, accumulator stops feed flow, by
Pump is with the flow direct-drive of 50% maximum operating speed, until work terminates.
Or in the license of any operating condition, oil pump direct drive can first be used to carry out jumping-up with 50% maximum operating speed or fill
Extruding is filled out, when load pressure rises to 20MPa, starting accumulator is flow-compensated, until load pressure is more than accumulator pressure
After power, accumulator stops feed flow, by pumping the flow direct-drive with 50% maximum operating speed, until work terminates.Therefore, it stores
Gesture device energy is just fully exploited, and efficiency is improved.
It can be seen that using the oil pump direct drive system of accumulator dynamic compensation, different from unrelated payload size, always
With traditional water pump of maximum pressure work-accumulator transmission, it is also different from the oil of maximum pressure and maximum stream flow, full power installation
Pump direct drive system.Accumulator storage power is intended merely to compensate oily oil pump direct drive in the stream of mesolow load stage
Insufficient section is measured, defined operating rate requirement is reached.
(5) matrix form multiple-channel output integrated valve block is relative to traditional independent, distributed pump head valve, so that entire power train
Road under the overall leadership is most short, and caliber is smaller, it is not necessary that the isolating valve of big orifice is arranged in systems, can effectively reduce pressure when isolation Vavle switching
Power impact；The flow that matrix form multiple-channel output integrated valve block can make each operating cylinder share every pump in different periods supplies
It gives, any pump breaks down in system, can be by any other online substitute work of pump.
The utility model will result directly in a kind of completely new super-huge multidirectional double acting combined precision extrusion molding hydraulic press of mould
Realization.Its hybrid power transmission principle and structure can be widely applied to the stamp forging hydraulic press of various tonnages, multi-ram forging liquid
Press, multidirectional mould hydraulic extrusion press, multidirectional hydralic stamping press etc., can carry out various heat ductile formings, ausforming technique.To band
Come many utility model has the advantages that can shape different directions band branch tooth shape from technological angle and cavity type is complicated integrally-built high-precision
Part is spent, flow of metal rate control is realized, enhances product performance and quality, greatly improve production efficiency and stock utilization,
Lower energy consumption, realizes low-carbon production, reduce cost；From engineering viewpoint, extremely it is intimately associated using process characteristic, rationally matches
Power resource is set, the function and performance requirement of hydraulic press are not only met, but also total installation of generating capacity and reactive loss is greatly reduced,
Energy consumption in basic charge expenditure and production to reduce customer power supply transformer capacity.Weight of equipment is reduced, reduction is set
Standby occupied area and melt pit depth, simplify Equipment Foundations, plant working area and height space are made to be fully used, and reduce dimension
Repair expense and investment cost etc..
Detailed description of the invention
Fig. 1 is the operation principle schematic diagram of the utility model,
Fig. 2 is the operation principle schematic diagram of the realistic application conditions of the utility model,
Fig. 3 is that the resistance of deformation of the multidirectional double acting compound hot extrusion process simulation of 5 1/8 〞 valve body of representative workpiece changes over time
Curve,
Reference signs list: 1-super-pressure plunger variable pump group, 2-mesohigh accumulators, 3-matrix form multiple-channel outputs
Integrated control valve block, 4-accumulators control valve block, 5-low-pressure reservoirs, 6-no pressure fuel tanks, 7-inflation systems, 8-circulations
System, 9-master cylinders and auxiliary cylinders control valve block, 10-pipelines, 11-check valves, 12-1-oil tank, 12-2-gas tank, 13-
The scene PSA nitrogen gas generating system, 14-isolating valves, 15-guides recycle overflow valve, 16-pipeline pressure release valves, 17-high frequency sound ratios
Valve, 18-reversal valves, 19-lowest liquid level valves, 20-guide's two-stage pressure overflow valves, 21-pressure reducing valves, 22-manual gate valves.
Specific embodiment
With reference to the accompanying drawings and detailed description, the utility model is furtherd elucidate.It should be understood that following specific embodiment parties
Formula is merely to illustrate the utility model rather than limitation the scope of the utility model.
Fig. 1 is the operation principle schematic diagram of the utility model, in conjunction with attached drawing as it can be seen that this accumulator flow and Pressure behaviour are mended
Repaying control system includes several mesohigh accumulators 2 and accumulator control valve block 4, and the mesohigh accumulator 2 includes several
Platform oil tank 12-1 and gas tank 12-2, tank outlet pipeline are directly connected to accumulator control valve block 4, and accumulator controls valve block 4 and controls
The compensating flowrate of liquefaction tank output.
The accumulator control valve block 4 includes high frequency sound proportioning valve 17, reversal valve 18, lowest liquid level valve 19, guide's twin-stage
Pressure relief valve 20, pressure reducing valve 21 and manual gate valve 22, the high frequency sound proportioning valve 17 control the motor-driven flow of oil tank 12-1
Output；The reversal valve 18 controls super-pressure plunger variable pump group 1 and operates in a cycle period to the repairing of oil tank 12-1,
It is allowed to restore the power of storage；The lowest liquid level valve 19 is responsible for security control of the oil tank 12-1 in minimum oil level；The elder generation
Lead the operating pressure conversion that two-stage pressure overflow valve 20 controls oil tank 12-1；The pressure reducing valve 21 maintains the pressure oil of oil tank 12-1
Pilot control oil sources as entire hydraulic system；By the switching of several manual gate valves 22, successively by oil tank 12-1 oil circuit
It is connected with the kicker cylinder of corresponding Main cylinder, it, being capable of manually implemented mold die sinking and backhaul under forced outage state.
In conjunction with Fig. 2, the utility model is applied to large-scale stamp forging hydraulic press hybrid-power hydraulic transmission system, main device packet
It includes: several super-pressure plunger variable pumps, several mesohigh accumulators, low-pressure reservoir and no pressure fuel tank and its cyclic system
System, matrix form multiple-channel output integrated control valve block, the scene PSA nitrogen gas generating system etc..By the pipeline of suitable flow rate by each device
It is organically connected, thus constitute one can satisfy multidirectional mould extruding, die forging, isothermal die forging process, etc. drafts forming, etc.
The requirement of the various metals plasticity flexible compound forming technology such as forging ratio forming, precision form, superplasticforming and prefabricated blank and punching
The shared joint pumping plant of the more hydraulic presses such as hole trimming, both can also independently be passed by pump direct drive by oil pump-accumulator
Hybrid power transmission that is dynamic, can also being compensated by pump direct drive+accumulator flow and Pressure behaviour.
The super-pressure plunger variable pump of large-scale stamp forging hydraulic press hybrid-power hydraulic transmission system is several variable pumps, work
Make pressure greater than 42MPa, output flow is greater than 635L/min, is its fuel feeding by low-pressure reservoir.Accumulator be several oil tanks and
Gas tank, according to production technology needs, operating pressure can adjust between 25-32 MPa, be that it is filled for the first time by the scene PSA nitrogen gas generating system
Pressure.
The maximum output flow of variable pump and the motorised volume of accumulator, by the speed of transmission condition and each Main cylinder
It determines.When operating pressure is less than 25MPa, and speed is 25-30mm/s, by variable pump direct drive；When operating pressure is less than
32MPa when speed is 50-60mm/s, is compensated by variable pump direct drive+accumulator dynamic；When operating pressure be greater than 32MPa,
To 42MPa, when speed is 20-30mm/s, by variable pump direct drive；Die forging operating condition after prefabricated blank is directly passed by variable pump
Dynamic+accumulator dynamic compensates, and final shaping stage is by variable pump direct drive；The master cylinder of 1# hydraulic press and each auxiliary cylinders and
The master cylinder of other hydraulic presses controls valve block with master cylinder and auxiliary cylinders by pipeline respectively and connect, by variable pump direct drive.
Accumulator also can be used as the pilot control oil sources of entire hydraulic system, including to each super-pressure plunger variable pump
Group, auxiliary pump, master cylinder and auxiliary cylinders control valve block, accumulator control the pilot control of valve block；Meanwhile in forced outage state
Down, it can be achieved that mold die sinking function and backhaul function.
The low-pressure reservoir operating pressure is 0.3-0.5MPa, has each Main cylinder idle running fortune for each hydraulic press
Dynamic filling liquid for super-pressure plunger variable pump group and assists the function of oil pump feed.When for Main cylinder filling liquid, using lower pressure
Power, when being super-pressure plunger variable pump group and auxiliary oil pump feed, using the pressure requirements for the oil sucting cavity for being suitable for different pumps, and must
It must be the oil liquid by circulatory system secondary filter and suitable oil temperature.
No pressure fuel tank is for the collection of normal leakage oil, mistake inside the oil return and hydraulic system of pilot control system
Filter and be recirculated back to low-pressure reservoir.
The matrix form multiple-channel output integrated control valve block, by pump head multiple-channel output integrated valve block and accumulator output control
Valve block is constituted.
Pump head multiple-channel output integrated valve block can integrate the motor-driven flow of the total flow of several variable pumps, accumulator input and
Output.The output oil of every variable pump high-pressure outlet oil and the motor-driven flow of accumulator, is input to by a check valve respectively
Integrated valve block.Respectively there is a guide to recycle overflow valve and several isolating valves on each input duct in integrated valve block.Collection
At the total input duct of valve block be equal to variable pump quantity and accumulator input duct and.The total delivery channel of integrated valve block is on-demand
The Main cylinder quantity to be driven determines, generally should be each independent Main cylinder setting delivery channel all the way, if one
When can be compatible in a cycle period, or delivery channel all the way is arranged in more than two Main cylinders altogether.Every road
Delivery channel is by an isolating valve and input duct connection, and the control valve for being connected to each Main cylinder is fast.Every road output stream
Road is respectively arranged with a pipeline pressure release valve.
After the manual gate valve of accumulator be arranged an accumulator output control valve block, by automatically controlled double pressure regulation relief valves,
The composition such as lowest liquid level valve, proportional reversing valve, high-pressure liquid-filling valve, pressure reducing valve.It is more that proportional reversing valve oil outlet pipeline leads to pump head
Road exports integrated valve block.
According to the control needs of each Main cylinder, matrix form multiple-channel output integrated valve block can be exported by the road isolating valve Shi Mei
Mouth shares the flow supply of every pump in different periods.I.e. each master cylinder can share the fuel feeding of all pumps, can both obtain
Single pump, dual stage pump, the more fuel feeding pumped, if it is desired, the flow supply of all pumps can also be obtained.Namely any main pump
With accumulator flow can be provided for any one Main cylinder.
The setting of high-pressure output port runner quantity, in addition to considering what each hydraulic press Main cylinder difference operating condition independently drove
It needs, should also take into account each Main cylinder combined running operating condition.For example, for 1# hydraulic press, it can be achieved that master cylinder 1 or master cylinder 2 are closing
Pressure maintaining, extruding, perforation, ejection (or perforation), die forging, isothermal die forging process, forging pressure classification, moved cross beam correction leveling after mould
Function, synchronization control function.
This oil pump direct drive+accumulator flow and the hybrid-power hydraulic of Pressure behaviour compensation are driven joint pumping plant, such as
Shown in attached drawing 2, including several super-pressure plunger variable pump groups 1, several mesohigh accumulators 2 and the scene PSA nitrogen gas generating system
13, matrix form multiple-channel output integrated control valve block 3, accumulator control valve block 4, low-pressure reservoir 5, no pressure fuel tank 6, inflation system
7, the circulatory system 8, main operating cylinder 9.Each device is connected as shown in schematic diagram by the pipeline 10 of suitable flow rate.
1) super-pressure plunger variable pump group 1
The utility model super-pressure plunger variable pump group 1, according to the process conditions of pump direct drive and deformation technique curve,
The variable pump of minimal number is configured, the operating pressure of variable pump is greater than 42MPa, and output flow is greater than 635L/min, using high frequency
The control of ratio volume variable displacement is rung, is its fuel feeding by low-pressure reservoir 5.Every variable pump discharge configures a check valve 11, respectively solely
It is vertical to be connected to matrix form multiple-channel output integrated control valve block 3.
It is configured relative to variable pump direct drive system by maximum stream flow, maximum pressure needed for technique maximum operating speed
The quantity of traditional design method, variable pump is greatly reduced, and can reduce by 50% or more installed power, effectively reduce reactive loss
With idle loop power loss, system heat generation is reduced.Variable pump outlet conduit independently arranges that caliber is small, liquid holds small, the rate of rise
Fastly, pressure release impact is small.
2) mesohigh accumulator 2 and the scene PSA nitrogen gas generating system 13
The utility model mesohigh accumulator 2 determines that mesohigh dynamic compensates according to process conditions and deformation technique curve
When motorised volume and flow, configure several oil tanks and gas tank 12.Operating pressure can adjust between 25-32 MPa, be showed by PSA
Field nitrogen gas generating system 13 is its pressurising for the first time, and is allowed to store power.Tank outlet pipeline is directly connected to accumulator control valve block
4, and it is controlled by it the compensating flowrate of oil tank output.
Traditional water pump-accumulator the transmission exported relative to unrelated payload size, always with maximum pressure and maximum stream flow
System provides the traditional design method of motorised volume by accumulator completely, and the quantity of required tank is greatly reduced, and can effectively reduce storage
Gesture device is idle or few function consumption, improves transmission efficiency.
3) matrix form multiple-channel output integrated control valve block 3
The utility model matrix form multiple-channel output integrated control valve block 3 is integrated with several super-pressure plunger variable pump groups 1
It is output and input with the flow of mesohigh accumulator 2.
The file of matrix is the input duct of each variable pump 1 and the motor-driven flow of accumulator 2, and the sum of input duct is equal to
The quantity of variable pump 1 and 2 input duct of accumulator and.The horizontally-arranged of matrix 1 is to control valve block 9 to each independent Main cylinder
The delivery channel of flow is provided, the Main cylinder quantity that the sum of delivery channel drives as needed determines, if recycled at one
When can be compatible in period, or delivery channel all the way is arranged in more than two Main cylinders altogether.
Respectively by m isolating valve 14 and m horizontally-arranged delivery channel connection in every file input duct；Every road delivery channel quilt
It is separately connected to m Main cylinder control valve block 9.
Every file input duct is always respectively set a guide and recycles overflow valve 15, both can be used as pump head safety valve,
Middle idle loop can be carried as pump to use；A pipeline pressure release valve 16 is respectively set in every road delivery channel, makes to lead to each master cylinder
Pipeline and all pumps can independent pressure releases.
The traditional design method an of independence, distributed pump head valve group is respectively set relative to every pump, avoids pump head
Circulating valve pressure release impact；Each pump can be in pumping plant individually upper pressure debugging, it is not necessary to worry the switch shape of each main valve block inlet valve
State；The isolating valve that setting big orifice is not needed in pumping plant or main valve block can effectively reduce compression shock when isolation Vavle switching；
The connecting pipe and connector quantity between pump and master cylinder control valve block are greatly reduced, so that entire transmission system pipeline is most short,
Caliber is smaller, and reduces the leakage link that thus may cause；Master cylinder that can be directly different by oil dispensing in pumping plant, institute
There is pump that can serve any one master cylinder.The flow for sharing every pump in different periods per each operating cylinder can be made to supply
It gives, any pump breaks down in system, can be by any other online substitute work of pump, it is not necessary to worry wherein one
Pump does not have oil sources problem after breaking down.
4) accumulator controls valve block 4
The accumulator of the utility model controls valve block 4, controls the motor-driven flow of oil tank 12-1 by high frequency sound proportioning valve 17
Output；Super-pressure plunger variable pump group 1 is controlled from reversal valve 18 to operate in a cycle period to the repairing of oil tank 12-1, is made
Recovery storage power；Security control of the oil tank 12-1 in minimum oil level is responsible for by lowest liquid level valve 19；By guide's twin-stage
Pressure relief valve 20 controls the operating pressure conversion of oil tank 12-1；By pressure reducing valve 21, oil tank 12-1 pressure oil can be made as whole
The pilot control oil sources of a hydraulic system；By the switching of several manual gate valves 22, by oil tank 12-1 oil circuit respectively with main work
The kicker cylinder of cylinder connects, can manually implemented mold die sinking and the certain stroke of backhaul under forced outage state.
Relative to traditional water pump-accumulator transmission system, accurate control is can be obtained in the flow output of oil tank 12-1, can be real
Existing pressure adjusts and eliminates compression shock, can be used as the pilot control oil sources of hydraulic system, including to each superelevation hydraulic plunger
Variable pump group, auxiliary pump, master cylinder and auxiliary cylinders control valve block, accumulator control the pilot control of valve block, reduce individual control
Make configuration and the installed power of pump.
5) low-pressure reservoir 5 and no pressure fuel tank 6
The low-pressure reservoir 5 of the utility model is a 0.3-0.5MPa pressure oil tank, has satisfaction low to each Main cylinder
The function of filling liquid is pressed, and has and provides the function of low pressure oil for each super-pressure pump.Fuel tank is filled with or discharged by inflation system 7
Gas pressure, pass through the circulatory system 8 realize fuel tank heating, cooling and filtration cycle.No pressure fuel tank 6 is connected by pipeline
The pilot control of valve block is controlled with collection super-pressure plunger variable pump group, auxiliary pump, master cylinder and auxiliary cylinders control valve block, accumulator
Normal internal leakage oil, returns to low-pressure reservoir 5 for clean oil liquid after filtering in the oil return of system, pump and system, to protect
Hold the balance of system oil liquid measure.
Relative to the design method of oil pump direct drive system conventional, the centrifugation of big flow, high power, poor efficiency is not used
Pump is Main cylinder filling liquid, does not use big flow, high-power screw pump to provide low pressure oil for super-pressure pump, greatly reduces dress
Machine power reduces operation power loss, has saved the energy.
6) the embodiments of the present invention are to develop a kind of oil pump direct drive+accumulator flow and Pressure behaviour is mended
The hybrid-power hydraulic transmission joint pumping plant repaid, it is hydraulic for the double acting combined precision extrusion molding of the multidirectional mould of seven Shaft and NC Machining Test of 350MN
The driving of machine and 30MN base hydraulic press and 20MN punching three equipment of trimming hydraulic machine.Compared with traditional design, project is thrown
Money is reduced and production cost reduces significantly: installation general power is reduced to 6081.5kW, transformer installation appearance by original design 19253kW
Amount is reduced to 8000kVA by 20000kVA, reduces 6,370,000 yuan of capacity basic charge year, year reduces 10,630,000 yuan of energy consumption cost；Become
Cost of power station, Equipment Foundations cost and hydraulic electric control buying expenses can reduce by more than 50.
Attached drawing 3 is that the resistance of deformation of the multidirectional double acting compound hot extrusion process simulation of 5 1/8 〞 valve body of representative workpiece changes over time
Curve, as seen from the figure, within a loaded cycle period, duration of load application less than 15%, non-duration of load application be greater than 85%, maximum become
Shape drag only accounts for the 15% of duration of load application, accounts for the 2% of entire cycle period.It is average to become even for the die forging operating condition after prefabricated blank
For shape drag also less than the 50% of nominal pressure, duration of load application is much smaller than 10%.
The dust cycle of above-mentioned multidirectional double acting extruding or die forging operating condition is longer, and impulse stroke is smaller, and rate of load condensate is lower,
If designing by pump direct drive system, installed power is very high；If by traditional water pump-accumulator transmission system, the quantity of water pump is pressed
The average value of required flow determines that the quantity of required pump is seldom, and is not able to satisfy a production line in one dust cycle
In the auxiliary cylinder of 350MN hydraulic press, 30MN hydraulic press and 20MN hydraulic press cylinder operating rate needs.Moreover, because
Accumulator maximum pressure is 32MPa, can not meet the requirement of 350MN hydraulic press system pressure 42MPa.
For this purpose, according to the characteristics of multidirectional double acting compound hot extrusion process and the transmission needs of Duo Tai hydraulic press, it is straight using oil pump
It connects transmission and accumulator dynamically compensates the mode combined, constitute hybrid power and combine pumping plant, it is direct oil pump can be given full play to
Be driven power consumption, hyperpressure and speed control, in terms of superiority, meanwhile, using accumulator in mesohigh
The technology of power stage dynamic compensating flowrate, power can be made full use of, and energy consumption is relatively low, reduce installation total work to the maximum extent
Rate, it is energy saving, project investment is reduced significantly and reduces production run cost.
Technological means disclosed in the utility model is not limited to the technical means disclosed in the above technical means, also
Including technical solution consisting of any combination of the above technical features.
It is enlightenment, through the above description, related work people with the above-mentioned desirable embodiment according to the utility model
Member can carry out various changes and amendments in the range of without departing from this item utility model technical idea completely.This item is real
It is not limited to the contents of the specification with novel technical scope, it is necessary to its technology is determined according to scope of the claims
Property range.
Claims (2)
1. accumulator flow and Pressure behaviour compensation control system, which is characterized in that including several mesohigh accumulators (2) and
Accumulator controls valve block (4), and the mesohigh accumulator (2) includes several oil tanks (12-1) and gas tank (12-2), and oil tank goes out
Mouth pipeline is directly connected to accumulator control valve block (4), and accumulator controls the compensating flowrate of valve block (4) control oil tank output；
Accumulator control valve block (4) includes high frequency sound proportioning valve (17), reversal valve (18), lowest liquid level valve (19), guide
Two-stage pressure overflow valve (20), pressure reducing valve (21) and manual gate valve (22), the high frequency sound proportioning valve (17) control oil tank (12-
1) output of motor-driven flow；The reversal valve (18) control super-pressure plunger variable pump group (1) in a cycle period to
The repairing of oil tank (12-1) operates, and is allowed to restore the power of storage；The lowest liquid level valve (19) is responsible for oil tank (12-1) most
Security control when low oil level；The operating pressure conversion of guide's two-stage pressure overflow valve (20) control oil tank (12-1)；Institute
It states pressure reducing valve (21) and maintains pilot control oil sources of the pressure oil of oil tank (12-1) as entire hydraulic system；Pass through several hands
The switching of dynamic gate valve (22) successively connects oil tank (12-1) oil circuit, in forced outage with the kicker cylinder of corresponding Main cylinder
It, being capable of manually implemented mold die sinking and backhaul under state.
2. accumulator flow according to claim 1 and Pressure behaviour compensation control system, which is characterized in that the middle height
Pressing accumulator (2) further includes the scene PSA nitrogen gas generating system (13), is mesohigh accumulator (2) by the scene PSA nitrogen gas generating system (13)
Oil tank (12-1) and gas tank (12-2) pressurising for the first time, and be allowed to store power.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821674387.9U CN209157021U (en) | 2018-10-16 | 2018-10-16 | Accumulator flow and Pressure behaviour compensation control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821674387.9U CN209157021U (en) | 2018-10-16 | 2018-10-16 | Accumulator flow and Pressure behaviour compensation control system |
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| CN209157021U true CN209157021U (en) | 2019-07-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109248981A (en) * | 2018-10-16 | 2019-01-22 | 南京迪威尔高端制造股份有限公司 | Accumulator flow and Pressure behaviour compensation control system |
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2018
- 2018-10-16 CN CN201821674387.9U patent/CN209157021U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109248981A (en) * | 2018-10-16 | 2019-01-22 | 南京迪威尔高端制造股份有限公司 | Accumulator flow and Pressure behaviour compensation control system |
| CN109248981B (en) * | 2018-10-16 | 2024-05-24 | 南京迪威尔高端制造股份有限公司 | Accumulator flow and pressure dynamic compensation control system |
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