CN106641074A - Intelligent feedback type variable throttling buffering system and method - Google Patents

Intelligent feedback type variable throttling buffering system and method Download PDF

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Publication number
CN106641074A
CN106641074A CN201710119902.0A CN201710119902A CN106641074A CN 106641074 A CN106641074 A CN 106641074A CN 201710119902 A CN201710119902 A CN 201710119902A CN 106641074 A CN106641074 A CN 106641074A
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CN
China
Prior art keywords
cushion dashpot
control valve
valve block
cylinder
buffering
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710119902.0A
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Chinese (zh)
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CN106641074B (en
Inventor
王成龙
邱志伟
曾庆良
陈萌
刘志海
马凡凡
孟昭胜
冯鹏超
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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Priority to CN201710119902.0A priority Critical patent/CN106641074B/en
Publication of CN106641074A publication Critical patent/CN106641074A/en
Priority to CA3002263A priority patent/CA3002263C/en
Priority to PCT/CN2017/095573 priority patent/WO2018157549A1/en
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Publication of CN106641074B publication Critical patent/CN106641074B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
    • F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
    • F16F9/461—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall characterised by actuation means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/3405—Throttling passages in or on piston body, e.g. slots
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
    • F16F9/5123—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity responsive to the static or steady-state load on the damper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
    • F16F9/5126—Piston, or piston-like valve elements

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention provides an intelligent feedback type variable throttling buffering system and a control method thereof and belongs to a variable throttling buffering system and method. According to the buffering system, one end of a direct driving cylinder is connected with a linear motor and the other end of the direct driving cylinder is connected with a stroke control valve block; the stroke control valve block is connected with a buffering cylinder through a pipeline; one end of the buffering cylinder is connected with a throttling control valve block and the other end of the buffering cylinder is connected with a cylinder cover of the buffering cylinder; the cylinder cover of the buffering cylinder is connected with a speed sensor and a displacement sensor; the throttling control valve block is connected with a controller and a pressure sensor; and the throttling control valve block is connected with a stepping motor which is coaxial with the buffering cylinder. The intelligent feedback type variable throttling buffering system has the advantages that the buffering capacity is changed along the change of impact load, so that efficient buffering is realized; a closed loop control system is adopted so that automatic adjustment of a buffering stroke and a throttling area is realized; the buffering of the impact load in a relatively large range is realized; the buffering of the uncertain impact load is realized through an automatic detection control system; the volume of a power source is effectively reduced; and the hydraulic oil leakage problem of a hydraulic buffer can be compensated.

Description

A kind of intelligent feedback variable throttling buffer system and its way to play for time
Technical field
The present invention relates to a kind of variable throttling buffer system and its way to play for time, particularly a kind of intelligent feedback variable throttling delays Flushing system and its way to play for time.
Background technology
Buffer device is one of indispensable part of all kinds of machines, and existing buffer can only be in less scope Buffer capacity is adjusted manually, automaticity is low, it is impossible to according to the capacity and stroke of shock loading real-time regulation buffer, for The buffering of overloading load cannot be completed, it is impossible to reliably protect machine；Buffer capacity can only be used below in specified buffer capacity, The damping of shocks and uncertain buffering of large span cannot be met.
Chinese patent discloses a kind of hydraulic bjuffer for automatically adjusting cushion effect, publication number CN202251621, main knot Structure includes piston, piston rod, cylinder barrel, sponge, sealing ring, fairlead and valve block, the course of work：Drain path is set on piston And the fluid flow of drain path is flowed through by valve block control, when foreign impacts power increases suddenly, the edge of valve block can be adjacent to work Plug, the fluid flow for flowing through drain path reduces, therefore cushion effect increases, when foreign impacts power reduces, the edge meeting of valve block Slowly restore to the original state, flow through the fluid flow increase of drain path, cushion effect reduces therewith, be achieved in that cushion effect with punching Hit automatically adjusting for power size.The shortcoming of presence:Buffer capacity cannot realize adjust, for overload operating mode under shock loading without Method effectively enters row buffering, can not realize that, with the Automatic adjusument of operating mode, intelligence degree is not high.
The content of the invention
The invention aims to provide a kind of intelligent feedback variable throttling buffer system, solving existing buffer can only It is used below in its specified buffer capacity, it is impossible to meet the damping of shocks of large span and the problem of uncertain buffering.
The object of the present invention is achieved like this：The intelligent feedback variable throttling of the present invention includes buffer system and buffering side Method；
Buffer system by the closed-loop control of velocity sensor and pressure sensor realize interior buffer capacity on a large scale from Dynamic adjustment, specific structure includes：Linear electric motors, direct acting cylinder, stroke control valve block, stepper motor, throttling control valve block, collection Processor, controller, pressure sensor, cushion dashpot, cushion dashpot cylinder cap, velocity sensor, displacement transducer；
One end of direct acting cylinder is connected with linear electric motors, and the other end is connected with stroke control valve block, and stroke control valve block passes through Pipeline is connected with cushion dashpot；One end of cushion dashpot is connected with throttling control valve block, and the other end is connected with cushion dashpot cylinder cap；In buffering Velocity sensor and displacement transducer are connected with cylinder cylinder cap；Acquisition Processor, controller are connected with throttling control valve block And pressure sensor；The stepper motor coaxial with cushion dashpot is connected with throttling control valve block；The output end of controller respectively with Each proportional control valve, stepper motor and linear electric motors；The output end of pressure sensor, velocity sensor and displacement transducer is equal It is connected with the input of Acquisition Processor, the input signal of controller foundation Acquisition Processor, respectively to each valve or motor Implement control.
Described controller is singlechip controller；Or PLC.
Described cushion dashpot includes：It is support bar, buffering cylinder piston rod, cushion dashpot rod chamber pipeline, fuel tank, replenishing valve, slow Rush cylinder rodless cavity pipeline, oil returning tube, cushion dashpot outer shell, back-moving spring, cushion dashpot inner casing, cushion dashpot piston and cushion dashpot to reset Piston；
The outer inner cylinder sleeve of cushion dashpot has cushion dashpot inner casing, there is back-moving spring, silk between cushion dashpot outer shell and cushion dashpot inner casing Bar and cushion dashpot return piston；There is cushion dashpot cylinder cap one end of cushion dashpot outer shell and cushion dashpot inner casing, and support bar passes through cushion dashpot Cylinder cap is connected to cushion dashpot outer shell and cushion dashpot inner casing on throttling control valve block；There is cushion dashpot piston in cushion dashpot inner casing, One end of buffering cylinder piston rod is connected with cushion dashpot piston, and the other end for buffering cylinder piston rod passes cushion dashpot cylinder cap；In buffering There is fuel tank the outer side of cylinder outer shell, and between fuel tank and stroke control valve block oil returning tube is connected；In stroke control valve block and throttling Cushion dashpot rodless cavity pipeline is connected between control valve block；Cushion dashpot is connected between stroke control valve block and cushion dashpot cylinder cap Rod chamber pipeline and replenishing valve.
Described throttling control valve block includes：Plug, throttle orifice, shaft coupling, screw mandrel and valve element；
Throttling control valve block is connected the center of one end with stepper motor and is linked in sequence shaft coupling, screw mandrel and valve element；Throttling One end for being connected with cushion dashpot of control valve block is linked in sequence and has plug and throttle orifice, and described throttle orifice side and cushion dashpot are without bar Chamber communicates, and opposite side is communicated with cushion dashpot reseting cavity.
Described direct acting cylinder includes：Three two-way proportioning valves of rod chamber, three two-way proportioning valves of rodless cavity, direct acting cylinder cylinder Lid, direct acting cylinder piston, stroke control valve block oil circuit, direct acting cylinder piston rod and passage；
Three two-way proportioning valves of rod cavity and rodless cavity three two are connected with the stroke control valve block being connected with direct acting cylinder Logical proportioning valve；There is stroke control valve block oil circuit in stroke control valve block；Direct acting cylinder cylinder cap is connected with the other end of direct acting cylinder, Direct acting cylinder cylinder cap is located between direct acting cylinder and linear electric motors；Passage is provided with direct acting cylinder cylinder cap；There is direct acting cylinder in direct acting cylinder Piston, is connected with direct acting cylinder piston rod on direct acting cylinder piston, and direct acting cylinder piston rod is connected with linear electric motors；Described stroke control The oil circuit of valve block processed is communicated with fuel tank, cushion dashpot rod chamber oil duct, cushion dashpot rodless cavity oil duct and direct acting cylinder.
Velocity sensor is arranged on the top of cushion dashpot, way to play for time：
(1), velocity sensor detects the speed of alluvium, by stroke control valve block real-time adjustment cushion stroke and first pressing Power；
(2), when impact body touches piston rod head, the speed of velocity sensor real-time detection impacted object, pressure are passed The pressure of sensor real-time detection cushion chamber, the rate signal and pressure signal for measuring is input into Acquisition Processor, Acquisition Processor Data are changed and calculated, by the data transfer after process to controller, controller output control signal, by throttling Control valve block controls the orifice size of buffer unit.
Comprise the following steps that：
Velocity sensor detects speed v of present percussion thing2, the pressure sensor detection of cushion chamber in buffer It is p to cushion dashpot internal pressure2, both are input to Acquisition Processor jointly, and Acquisition Processor is calculated and completes current slow automatically Optimal orifice size s of punching2, current buffer orifice size is s3, Acquisition Processor calculates s automatically2-s3Between difference, By the data transfer after process to controller, controller output control signal.
Work as s2>s3When, that is, the most pre- orifice size needed for Current buffer is completed more than current orifice size, controller control Stepper motor, stepper motor drives valve element rectilinear movement by leading screw, reduces throttle orifice and has been reached by the region that valve element is covered Into optimal pre- orifice size s of Current buffer2；
Work as s2<s3When, that is, the optimal orifice size needed for Current buffer is completed less than current orifice size, controller control Stepper motor, stepper motor drives valve element rectilinear movement by leading screw, increases throttle orifice and has been reached by the region that valve element is covered Into optimal pre- orifice size s of Current buffer2；
Because the mobile rod chamber of cushion dashpot piston needs fluid to supplement, therefore replenishing valve is set, cylinder piston rod is fast when buffering When speed is mobile, replenishing valve is opened and carries out repairing to cushion dashpot rod chamber.
Beneficial effect and advantage：
1st, buffer capacity follows shock loading to change and change, and realizes high efficiency buffer；
2nd, automatically adjusting for cushion stroke and orifice size is realized using closed-loop control system；
3rd, the larger buffering of shock loading excursion is realized, little shock loading can either be buffered, favourable opposition can be buffered again Hit load；
4th, by automatic detection and control system, the buffering of uncertain shock loading is realized
5th, drive direct acting cylinder to provide the power for adjusting stroke using linear electric motors, effectively reduce power volume source；
Description of the drawings：
Fig. 1 is the structure chart of the present invention.
Fig. 2 is cushion dashpot structure chart of the present invention.
Fig. 3 is the direct acting cylinder structure figure of the present invention.
In figure, 1, linear electric motors；2nd, direct acting cylinder；3rd, stroke control valve block；4th, three two-way proportioning valves of rod chamber；5th, without bar Three, chamber two-way proportioning valve；6th, stepper motor；7th, throttling control valve block；8th, Acquisition Processor；9th, controller, 10, pressure sensing Device；11st, cushion dashpot；12nd, support bar；13rd, cushion dashpot cylinder cap；14th, velocity sensor；15th, cylinder piston rod is buffered；16th, displacement is passed Sensor；17th, cushion dashpot rod chamber pipeline；18th, fuel tank；19th, replenishing valve；20th, cushion dashpot rodless cavity pipeline；21st, oil returning tube； 22nd, direct acting cylinder cylinder cap；23rd, cushion dashpot outer shell；24th, back-moving spring；25th, cushion dashpot inner casing；26th, cushion dashpot piston；27th, plug； 28th, throttle orifice；29th, shaft coupling；30th, screw mandrel；31st, valve element；32nd, cushion dashpot return piston；33rd, direct acting cylinder piston, 34, stroke control Valve block oil circuit processed；35th, direct acting cylinder piston rod；36th, passage.
Specific embodiment
The intelligent feedback variable throttling of the present invention includes buffer system and way to play for time；
Buffer system by the closed-loop control of velocity sensor and pressure sensor realize interior buffer capacity on a large scale from Dynamic adjustment, specific structure includes：Linear electric motors 1, direct acting cylinder 2, stroke control valve block 3, stepper motor 6, throttling control valve block 7th, Acquisition Processor 8, controller 9, pressure sensor 10, cushion dashpot 11, cushion dashpot cylinder cap 13, velocity sensor 14, displacement are passed Sensor 16；
One end of direct acting cylinder 2 is connected with linear electric motors 1, and the other end is connected with stroke control valve block 3, stroke control valve block 3 It is connected with cushion dashpot 11 by pipeline；One end of cushion dashpot 11 is connected with throttling control valve block 7, and the other end is connected with cushion dashpot cylinder Lid 13；Velocity sensor 14 and displacement transducer 16 are connected with cushion dashpot cylinder cap 13；It is connected with throttling control valve block 7 Acquisition Processor 8, controller 9 and pressure sensor 10；The stepping electricity coaxial with cushion dashpot 11 is connected with throttling control valve block 7 Machine 6；The output end of controller 9 respectively with each proportional control valve, stepper motor and linear electric motors 1；Pressure sensor 9, speed The output end of sensor 13 and displacement transducer 15 is connected with the input of Acquisition Processor 8, controller 9 according to collection at The input signal of reason device 8, implements control to each valve or motor respectively；
Described controller is singlechip controller；Or PLC.
Described cushion dashpot includes：Support bar 12, buffering cylinder piston rod 15, cushion dashpot rod chamber pipeline 17, fuel tank 18, fill It is liquid valve 19, cushion dashpot rodless cavity pipeline 20, oil returning tube 21, cushion dashpot outer shell 23, back-moving spring 24, cushion dashpot inner casing 25, slow Rush cylinder piston 26 and cushion dashpot return piston 32；
Cushion dashpot inner casing 25 is cased with cushion dashpot outer shell 23, has reset between cushion dashpot outer shell 23 and cushion dashpot inner casing 25 Spring 23, screw mandrel 29 and cushion dashpot return piston 32；There is cushion dashpot cylinder cap one end of cushion dashpot outer shell 23 and cushion dashpot inner casing 54 13, support bar 12 is connected to cushion dashpot outer shell 23 and cushion dashpot inner casing 25 on throttling control valve block 7 by cushion dashpot cylinder cap 13； There is cushion dashpot piston 26 in cushion dashpot inner casing 25, the one end for buffering cylinder piston rod 15 is connected with cushion dashpot piston 26, cushion dashpot The other end of piston rod 15 passes cushion dashpot cylinder cap 13；There is fuel tank 18 in the outer side of cushion dashpot outer shell 23, in fuel tank 18 and stroke Connect oil returning tube 21 between control valve block 3；Be connected between stroke control valve block 3 and throttling control valve block 7 cushion dashpot without Rod cavity pipeline 20；Cushion dashpot rod chamber pipeline 17 and replenishing valve are connected between stroke control valve block 3 and cushion dashpot cylinder cap 13 19。
Described throttling control valve block 7 includes：Plug 27, throttle orifice 28, shaft coupling 29, screw mandrel 30 and valve element 31；
The center that throttling control valve block 7 is connected one end with stepper motor 6 is linked in sequence shaft coupling 29, screw mandrel 30 and valve element 31；One end that throttling control valve block 7 is connected with cushion dashpot 11 is linked in sequence plug 27 and throttle orifice 28, described throttle orifice one Side communicates with cushion dashpot rodless cavity, and opposite side is communicated with cushion dashpot reseting cavity.
Described plug is that valve block is isolated from the outside in the oil circuit that process is externally formed, and makes oil body not leak.
Described direct acting cylinder 2 includes：Three two-way proportioning valves 4 of rod chamber, three two-way proportioning valves 5 of rodless cavity, direct acting cylinder Cylinder cap 22, direct acting cylinder piston 33, stroke control valve block oil circuit 34, direct acting cylinder piston rod 35 and passage 36；
Three two-way proportioning valves 4 of rod cavity and rodless cavity three are connected with the stroke control valve block 3 being connected with direct acting cylinder 2 Two-way proportioning valve 5；There is stroke control valve block oil circuit 34 in stroke control valve block 3；Direct acting is connected with the other end of direct acting cylinder 2 Cylinder cylinder cap 22, direct acting cylinder cylinder cap 22 is located between direct acting cylinder 2 and linear electric motors 1；Passage 36 is provided with direct acting cylinder cylinder cap；Straight Have direct acting cylinder piston 33 in dynamic cylinder 2, be connected with direct acting cylinder piston rod 35 on direct acting cylinder piston 33, direct acting cylinder piston rod 35 with it is straight Line motor 1 connects；The oil circuit of described stroke control valve block 34 is with fuel tank 18, cushion dashpot rod chamber oil duct 17, cushion dashpot without bar Chamber oil duct 20 and direct acting cylinder 2 are communicated.
Velocity sensor 14 be arranged on cushion dashpot top, way to play for time：
(1), velocity sensor detects the speed of alluvium, by stroke control valve block real-time adjustment cushion stroke and first pressing Power；
(2), when impact body touches piston rod head, the speed of velocity sensor real-time detection impacted object, pressure are passed The pressure of sensor real-time detection cushion chamber, the rate signal and pressure signal for measuring is input into Acquisition Processor, Acquisition Processor Data are changed and calculated, by the data transfer after process to controller, controller output control signal, by throttling Control valve block controls the orifice size of buffer unit.
Comprise the following steps that：
Velocity sensor 14 at the top of cushion dashpot detects speed v of present percussion thing2, buffer in buffer The pressure sensor 10 in chamber detects cushion dashpot internal pressure for p2, both are input to Acquisition Processor 8, Acquisition Processor jointly 8 calculate optimal orifice size s for completing Current buffer automatically2, current buffer orifice size is s3, Acquisition Processor 8 is automatic Calculate s2-s3Between difference, by the data transfer after process to controller 9, the output control signal of controller 9.
Work as s2>s3When, that is, the most pre- orifice size needed for Current buffer is completed more than current orifice size, controller 9 is controlled Stepper motor 6, stepper motor 6 drives valve element 31 to move linearly by leading screw 30, makes throttle orifice 28 reduce the area covered by valve element Domain reaches optimal pre- orifice size s for completing Current buffer2；
Work as s2<s3When, that is, the optimal orifice size needed for Current buffer is completed less than current orifice size, controller 9 is controlled Stepper motor 6, stepper motor 6 drives valve element 31 to move linearly by leading screw 30, makes throttle orifice 28 increase the area covered by valve element Domain reaches optimal pre- orifice size s for completing Current buffer2；
Because the mobile rod chamber of cushion dashpot piston 26 needs fluid to supplement, therefore replenishing valve 19 is set, when cushion dashpot piston When bar 15 is quickly mobile, replenishing valve 19 is opened carries out repairing to cushion dashpot rod chamber.
Embodiment 1：Velocity sensor 14 at the top of cushion dashpot detects speed v of present percussion thing2, positioned at buffering The pressure sensor 9 of cushion chamber detects cushion dashpot internal pressure for p in device2, both are input to Acquisition Processor 8, adopt jointly Set processor 8 calculates optimal orifice size s for completing Current buffer automatically2, current buffer orifice size is s3, at collection Reason device 8 calculates s automatically2-s3Between difference,
Work as s2>s3When, that is, the most pre- orifice size needed for Current buffer is completed more than current orifice size, controller 9 is controlled Stepper motor 6, stepper motor 6 drives valve element 31 to move linearly by leading screw 30, makes throttle orifice 28 reduce the area covered by valve element Domain reaches optimal pre- orifice size s for completing Current buffer2；
Work as s2<s3When, that is, the optimal orifice size needed for Current buffer is completed less than current orifice size, controller 9 is controlled Stepper motor 6, stepper motor 6 drives valve element 31 to move linearly by leading screw 30, makes throttle orifice 28 increase the area covered by valve element Domain reaches optimal pre- orifice size s for completing Current buffer2；
Because the mobile rod chamber of cushion dashpot piston 26 needs fluid to supplement, therefore replenishing valve 19 is set, when cushion dashpot piston When bar 15 is quickly mobile, replenishing valve 19 is opened carries out repairing to cushion dashpot rod chamber.
The specific course of work：
First, cushion stroke is adjusted
The speed of the real-time detection alluvium of velocity sensor 14 at the top of cushion dashpot, by rate signal collection is passed to Rate signal is changed and calculated by processor 8, Acquisition Processor 8, and result of calculation is passed to controller by Acquisition Processor 8 8, controller 9 drives linear electric motors 1, the direct drive direct acting cylinder of linear electric motors 1 piston 33 to move, and the pressure oil output of direct acting cylinder 2 is led to The flow that three two-way proportioning valves 4 of three two-way proportioning valves 5 of rodless cavity and rod chamber adjust output hydraulic pressure oil is crossed, output is adjusted slow Cylinder 11 is rushed to the speed of hydraulic oil, so as to adjust the stroke of cushion dashpot 11, concrete regulation process is as follows：Velocity sensor 14 is detected Rate signal is passed to Acquisition Processor 8 by alluvium speed, velocity sensor 14, and Acquisition Processor 8 carries out rate signal Result of calculation is passed to controller 8 by conversion and calculating, Acquisition Processor 8, and controller 9 calculated and currently complete required for buffering Cushion stroke x, at the top of cushion dashpot displacement transducer 15 detection current buffer stroke x1, Acquisition Processor 8 is automatic Calculate x-x1Between difference.
If x>x1, that is, the stroke of Current buffer is completed more than current buffer stroke, need to increase the buffering row of cushion dashpot 11 Pressure oil is accessed the rodless cavity of cushion dashpot 11 by journey, three two-way proportioning valves 5 of rodless cavity, and three two-way proportioning valves 4 of rod chamber will be slow The rod chamber for rushing cylinder 11 accesses fuel tank 18, therefore pressure oil is pushed outwardly cylinder piston rod 15 is buffered, until displacement transducer 16 Detection reaches the stroke s that can complete Current buffer, and at this moment controller 8 will send signal, make three two-way ratios of rodless cavity Three two-way proportioning valves 4 of valve 5 and rod chamber return to middle position, and the stop motion of linear electric motors 1 completes stroke adjustment effect；
If s<s1, that is, the stroke of Current buffer is completed less than current buffer stroke, need to reduce the buffering row of cushion dashpot 11 Pressure oil is accessed fuel tank 18 by journey, three two-way proportioning valves 5 of rodless cavity, and three two-way proportioning valves 4 of rod chamber are by cushion dashpot 11 Rod chamber accesses the rodless cavity of cushion dashpot 11, therefore pressure oil is retracted cylinder piston rod 15 is buffered inwards, until displacement transducer inspection Measure and reach the stroke s that can complete Current buffer, at this moment controller will send signal, make three two-way proportioning valves 5 of rodless cavity Middle position is returned to three two-way proportioning valves 4 of rod chamber, linear electric motors stop motion completes stroke adjustment effect；All control valves Median Function be it is O-shaped.
2nd, initial pressure setting
The speed of the real-time detection alluvium of velocity sensor 14 at the top of cushion dashpot, by rate signal collection is passed to Rate signal is changed and calculated by processor 8, Acquisition Processor 8, and result of calculation is passed to controller by Acquisition Processor 8 8, controller 9 according to the speed of present percussion thing calculate complete Current buffer needed for optimal initial pressure p, the pressure inside cushion dashpot Force snesor 10 detects Current buffer cylinder interior pressure value for p1, Acquisition Processor 8 calculates p-p automatically1Between difference.
Work as p>p1When, that is, optimal initial pressure p for completing Current buffer needs is more than internal pressure p of Current buffer cylinder 111, need The internal pressure of cushion dashpot 11 is improved, so as to Current buffer, the control linear electric motors 1 of controller 9, straight line most effective could be completed The direct drive direct acting cylinder of motor 1 piston 33 is moved, the pressure oil output of direct acting cylinder 2, three cut-in pressures of two-way proportioning valve 5 of rodless cavity Oil, three two-way proportioning valves 4 of rod chamber are in middle position state, and the pressure oil of cushion dashpot rodless cavity compresses back-moving spring 32, directly Monitor that reaching the internal pressure of cushion dashpot 11 completes optimal needed for Current buffer to the internal pressure sensor 10 of cushion dashpot 11 Initial pressure p, controller 9 sends signal makes linear electric motors 1 return to middle position with all control valves；
Work as p>p1When, that is, optimal initial pressure p for completing Current buffer needs is less than internal pressure p of Current buffer cylinder 111, need The internal pressure of cushion dashpot 11 is reduced, so as to Current buffer, the control linear electric motors 1 of controller 9, straight line most effective could be completed The direct drive direct acting cylinder of motor 1 piston 33 is moved, and direct acting cylinder 2 is accessed directly from cushion dashpot oil suction, three two-way proportioning valves 5 of rodless cavity Dynamic cylinder, three two-way proportioning valves 4 of rod chamber are in middle position state, and the pressure oil of cushion dashpot rodless cavity is released back-moving spring 32 Put, until the internal pressure sensor 10 of cushion dashpot 11 monitors that reaching the internal pressure of cushion dashpot 11 completes needed for Current buffer Optimal initial pressure p, controller sends signal makes linear electric motors 1 return to middle position with all control valves；
3rd, orifice size is adjusted
(1) alluvium is not in contact with to buffering cylinder piston rod
The speed of the real-time detection alluvium of velocity sensor 14 at the top of cushion dashpot, by rate signal collection is passed to Rate signal is changed and calculated by processor 8, Acquisition Processor 8, and result of calculation is passed to controller by Acquisition Processor 8 8, Acquisition Processor 8 calculates optimal pre- orifice size s completed required for Current buffer, and the orifice size of current buffer is s1, Acquisition Processor 8 calculates s-s automatically1Between difference, controller 9 control stepper motor 6, stepper motor 6 pass through leading screw 30 driving valve elements 31 move linearly, and make the area of throttle orifice 28 reach optimal pre- orifice size s for completing Current buffer, it is to avoid moment Regulated quantity is excessive during impact.
Work as s>s1When, that is, the optimal pre- orifice size needed for Current buffer is completed more than current orifice size, controller 9 is controlled Stepper motor processed 6, stepper motor 6 drives valve element 31 to move linearly by leading screw 30, makes throttle orifice 28 reduce what is covered by valve element Region reaches optimal pre- orifice size s for completing Current buffer；
Work as s<s1When, that is, the optimal pre- orifice size needed for Current buffer is completed less than current orifice size, controller 9 is controlled Stepper motor processed 6, stepper motor 6 drives valve element 31 to move linearly by leading screw 30, makes throttle orifice 28 increase what is covered by valve element Region reaches optimal pre- orifice size s for completing Current buffer；
(2) alluvium touches buffering cylinder piston rod
When alluvium touches buffering cylinder piston rod 15, the pressure in the speed and cushion chamber of alluvium all can be sent out constantly Changing, and the key factor for affecting to buffer efficiency is pressure in the speed and cushion chamber of alluvium, by detecting impact Pressure in the speed and cushion chamber of thing, so as to control throttleng surface, the buffering efficiency that can make buffer reaches highest.

Claims (6)

1. a kind of intelligent feedback variable throttling buffer system, is characterized in that：Buffer system includes：Linear electric motors, direct acting cylinder, stroke Control valve block, stepper motor, throttling control valve block, Acquisition Processor, controller, pressure sensor, cushion dashpot, cushion dashpot cylinder Lid, velocity sensor, displacement transducer；Interior buffering on a large scale is realized by the closed-loop control of velocity sensor and pressure sensor The adjust automatically of capacity；
One end of the direct acting cylinder is connected with linear electric motors, and the other end is connected with stroke control valve block, and stroke control valve block passes through Pipeline is connected with cushion dashpot；One end of cushion dashpot is connected with throttling control valve block, and the other end is connected with cushion dashpot cylinder cap；Described Velocity sensor and displacement transducer are connected with cushion dashpot cylinder cap；Acquisition process is connected with described throttling control valve block Device, controller and pressure sensor；The stepper motor coaxial with cushion dashpot is connected with throttling control valve block；The controller Output end respectively with each proportional control valve, stepper motor and linear electric motors；The pressure sensor, velocity sensor and displacement The output end of sensor is connected with the input of Acquisition Processor, and controller divides according to the input signal of Acquisition Processor It is other that control is implemented to each valve or motor；Described controller is singlechip controller；Or PLC.
2. a kind of intelligent feedback variable throttling buffer system according to claim 1, is characterized in that：Described cushion dashpot bag Include：Support bar, buffering cylinder piston rod, cushion dashpot rod chamber pipeline, fuel tank, replenishing valve, cushion dashpot rodless cavity pipeline, oil return pipe Road, cushion dashpot outer shell, back-moving spring, cushion dashpot inner casing, cushion dashpot piston and cushion dashpot return piston；
The outer inner cylinder sleeve of the cushion dashpot has cushion dashpot inner casing, there is back-moving spring, silk between cushion dashpot outer shell and cushion dashpot inner casing Bar and cushion dashpot return piston；There is cushion dashpot cylinder cap one end of cushion dashpot outer shell and cushion dashpot inner casing, and support bar passes through cushion dashpot Cylinder cap is connected to cushion dashpot outer shell and cushion dashpot inner casing on throttling control valve block；There is cushion dashpot piston in cushion dashpot inner casing, One end of buffering cylinder piston rod is connected with cushion dashpot piston, and the other end for buffering cylinder piston rod passes cushion dashpot cylinder cap；In buffering There is fuel tank the outer side of cylinder outer shell, and between fuel tank and stroke control valve block oil returning tube is connected；In stroke control valve block and throttling Cushion dashpot rodless cavity pipeline is connected between control valve block；Cushion dashpot is connected between stroke control valve block and cushion dashpot cylinder cap Rod chamber pipeline and replenishing valve.
3. a kind of intelligent feedback variable throttling buffer system according to claim 1, is characterized in that：Described throttling control Valve block includes：Plug, throttle orifice, shaft coupling, screw mandrel and valve element；
The center that the throttling control valve block is connected one end with stepper motor is linked in sequence and has shaft coupling, screw mandrel and valve element；Throttling One end for being connected with cushion dashpot of control valve block is linked in sequence and has plug and throttle orifice, and described throttle orifice side and cushion dashpot are without bar Chamber communicates, and opposite side is communicated with cushion dashpot reseting cavity.
4. a kind of intelligent feedback variable throttling buffer system according to claim 1, is characterized in that：Described direct acting cylinder bag Include：Three two-way proportioning valves of rod chamber, three two-way proportioning valves of rodless cavity, direct acting cylinder cylinder cap, direct acting cylinder piston, stroke control valve Block oil circuit, direct acting cylinder piston rod and passage；
Three two-way ratios of three two-way proportioning valves of rod cavity and rodless cavity are connected with the stroke control valve block being connected with direct acting cylinder Example valve；There is stroke control valve block oil circuit in stroke control valve block；Direct acting cylinder cylinder cap, direct acting are connected with the other end of direct acting cylinder Cylinder cylinder cap is located between direct acting cylinder and linear electric motors；Passage is provided with direct acting cylinder cylinder cap；There is direct acting cylinder piston in direct acting cylinder, Direct acting cylinder piston rod is connected with direct acting cylinder piston, direct acting cylinder piston rod is connected with linear electric motors；Described stroke control valve The oil circuit of block is communicated with fuel tank, cushion dashpot rod chamber oil duct, cushion dashpot rodless cavity oil duct and direct acting cylinder.
5. a kind of intelligent feedback variable throttling way to play for time, is characterized in that：Velocity sensor is arranged on the top of cushion dashpot, buffering Method includes：
(1) velocity sensor detects the speed of alluvium, by stroke control valve block real-time adjustment cushion stroke and initial pressure；
(2) when impact body touches piston rod head, the speed of velocity sensor real-time detection impacted object, pressure sensor reality When detect the pressure of cushion chamber, the rate signal and pressure signal for measuring is input into Acquisition Processor, and Acquisition Processor is by data Changed and calculated, by the data transfer after process to controller, controller output control signal, by throttling control valve Block controls the orifice size of buffer unit.
6. a kind of intelligent feedback variable throttling way to play for time according to claim 5, is characterized in that：Velocity sensor is detected To speed v of present percussion thing2, the pressure sensor of cushion chamber detects cushion dashpot internal pressure for p in buffer2, two Person is input to Acquisition Processor jointly, and Acquisition Processor calculates optimal orifice size s for completing Current buffer automatically2, currently Buffer orifice size is s3, Acquisition Processor calculates s automatically2-s3Between difference, the data transfer after process is given Controller, controller output control signal；
Work as s2>s3When, that is, the most pre- orifice size needed for Current buffer is completed more than current orifice size, controller control stepping Motor, stepper motor drives valve element rectilinear movement by leading screw, throttle orifice reduction is reached by the region that valve element is covered and completes to work as Optimal pre- orifice size s of front buffering2；
Work as s2<s3When, that is, the optimal orifice size needed for Current buffer is completed less than current orifice size, controller control stepping Motor, stepper motor drives valve element rectilinear movement by leading screw, throttle orifice increase is reached by the region that valve element is covered and completes to work as Optimal pre- orifice size s of front buffering2；
Cushion dashpot piston is moved, and rod chamber needs fluid to supplement, therefore arranges replenishing valve, when buffering cylinder piston rod is quickly moved, Replenishing valve is opened and carries out repairing to cushion dashpot rod chamber.
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