CN109773103A - Flow matching type hydraulic machine servo control system - Google Patents
Flow matching type hydraulic machine servo control system Download PDFInfo
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- CN109773103A CN109773103A CN201910203844.9A CN201910203844A CN109773103A CN 109773103 A CN109773103 A CN 109773103A CN 201910203844 A CN201910203844 A CN 201910203844A CN 109773103 A CN109773103 A CN 109773103A
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- 239000012530 fluid Substances 0.000 claims description 17
- 239000002828 fuel tank Substances 0.000 claims description 11
- 239000003921 oil Substances 0.000 abstract description 34
- 239000010729 system oil Substances 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 230000003749 cleanliness Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a flow matching type hydraulic machine servo control system, which comprises a flow matching type balance valve, a two-position two-way electromagnetic valve, a servo motor, a double gear pump and a hydraulic machine main cylinder, wherein the flow matching type balance valve is connected with the two-position two-way electromagnetic valve; an upper oil port of the flow matching type balance valve is connected with a rod cavity of the main cylinder, a lower oil port of the flow matching type balance valve is connected with an oil outlet of a small-flow gear pump of the duplicate gear pump, and a side oil outlet of the flow matching type balance valve is connected with a system oil tank; the double gear pump comprises a large-flow gear pump and a small-flow gear pump; one end of the two-position two-way electromagnetic valve is connected with an oil outlet of the double gear pump high-flow gear pump, and the other end of the two-position two-way electromagnetic valve is connected with a system oil tank; the oil outlet of the small flow gear pump of the duplicate gear pump is connected with one end of a two-position two-way electromagnetic valve through a one-way valve; the servo motor is connected with a double gear pump. The flow matching type hydraulic machine servo control system has the advantages of low modification or installation cost, reliability, stable control, environment-friendly use and insensitivity to oil temperature and cleanliness, and can effectively ensure the position precision and system safety of the slow descending of the hydraulic machine.
Description
Technical field
The invention belongs to technical field of hydraulic, are related specifically to a kind of flow matches formula hydraulic press SERVO CONTROL system
System.
Background technique
Hydraulic press is one kind of forging press, i.e., high using hydraulic power density, and system response is fast to wait special advantage to drive
Oil cylinder, and then pressing mold sliding block is driven to realize the forging and forming to workpiece.The high-precision modeling pressure to workpiece may be implemented in hydraulic press
System, in order to improve compacting efficiency while guarantee the compacting precision of workpiece, in pressing stage, hydraulic press generally has fast downlink and slowly
Two stages of fast downlink suppress the control mainly row order section completion at this slow speed of precision.
Existing hydraulic press, basic control principle be motor drive hydraulic pump, then by solenoid valve, proportional control valve or
Configuration overflow valve, speed governing valve, throttle valve etc. pump controlling the straight line of hydraulic press master cylinder and forge and press workpiece, master cylinder
Pressing position or precision, be all to be realized by the flow of control proportional control valve, to the higher of compacting required precision, then
The requirement of proportional control valve is higher, and cost is just high, and control method is complicated；Moreover, being easy to allow system using proportional control valve
Amount of heat is generated, when especially the precision of downlink is suppressed at a slow speed, fever is become apparent from, and efficiency waste is serious.
Summary of the invention
The invention proposes a kind of hydraulic motor servo-controlled system of flow matches formula, in hydraulic press descending phase at a slow speed, throw
Traditional proportional control valve is abandoned, using flow matches formula balance control valve, realizes the precision controlling of hydraulic press descending phase at a slow speed
It is run with stable, and energy utilization efficiency with higher.
In order to realize above-mentioned technical characterstic, the invention proposes a kind of hydraulic motor servo-controlled system of flow matches formula, packets
Include flow matches formula balanced valve, two-position two-way solenoid valve, servo motor, system fuel tank, duplex gear pump and hydraulic press master cylinder；
Duplex gear pump includes a big flow gear pump and one small flow gear pump, and big flow gear pump and small flow gear pump are equal
Equipped with oil outlet；Flow matches formula balanced valve (see patent CN 208474223U) is equipped with top hydraulic fluid port, lower part hydraulic fluid port and side
Oil outlet, the rod chamber of the top hydraulic fluid port connection master cylinder of flow matches formula balanced valve, lower part hydraulic fluid port are connected to small flow gear pump
Oil outlet, side oil outlet connect system fuel tank；Big flow gear pump oil outlet connects flow matches formula balanced valve through check valve
Lower part hydraulic fluid port；The oil outlet of small flow gear pump and one end of two-position two-way solenoid valve connect, and small flow gear pump and two
Check valve is equipped between two-way electromagnetic valve；The one of two-position two-way solenoid valve terminates the fuel-displaced of duplex gear pump big flow gear pump
Mouthful, another terminating systems fuel tank；Servo motor connects duplex gear pump.
As an embodiment, position sensor is installed on hydraulic press master cylinder.
As an embodiment, big flow gear pump is identical as the rated operating pressure of small flow gear pump.
As an embodiment, the revolving speed of servo motor is adjustable, is adjusted by adjusting the revolving speed of servo motor
Into the oil mass of flow matches formula balanced valve, to control position or the speed of hydraulic press master cylinder.
As an embodiment, during system fast downlink or fast uplink, this system motor and gear pump can
Partial discharge is contributed by other circuit.
The characteristics of flow matches formula balanced valve, is: guaranteeing that the aperture of throttle orifice is always same by the size of machining
Step, it is fully controllable to guarantee to pass in and out the flow of hydraulic oil of oil cylinder, it may be assumed that flow matches formula balanced valve is entered by control system
Oil mass, to control the fuel-displaced oil mass of oil cylinder, and hardly influenced by the external world.
Therefore, the beneficial effect of the present invention compared with prior art is:
1, it is based on this flow matches formula balanced valve hydraulic press control system, it is at low cost, it is reliable and stable, it can abandon original
To control the servo proportion of position precision, the cost of hydraulic press control system is substantially reduced；
2, the hydraulic press control system based on the design of this flow matches formula balanced valve, application are very flexible；Can directly it exist
On the basis of original hydraulic press system, increase, which is gone slowly, pushes subsystem, is effectively transformed to original hydraulic press system
Upgrade and cost is extremely low；
3, compared with traditional based on the hydraulic press system of servo proportion control precision, flow matches proposed by the present invention
Formula hydraulic press control system not only can be effectively controlled the position precision of hydraulic press master cylinder, and control method greatly simplifies, and only need to control
The revolving speed of system servo motor processed can control system flow, master cylinder position or speed can be accurately controlled.
4, flow matches formula balanced valve belongs to pump-controlling valve, and compared with proportional control valve, the calorific value of system can be effectively controlled
And temperature, improve system stability.
Detailed description of the invention
Fig. 1 is flow matches formula hydraulic press control system schematic diagram provided by the invention.
Specific embodiment
Below in conjunction with attached drawing, the technical characteristic and advantage above-mentioned and other to the present invention carry out clear, are fully described by, aobvious
So, described embodiment is only section Example of the invention, instead of all the embodiments.
As shown in Figure 1, being flow matches formula hydraulic press control system schematic diagram provided in an embodiment of the present invention, mainly by watching
Take motor 1, system fuel tank, duplex gear pump, two-position two-way solenoid valve 4, flow matches formula balanced valve 5, check valve 6 and stoste pressure
Machine system master cylinder 7 forms；Duplex gear pump is made of a big flow gear pump 2 and one small flow gear pump 3；Flow matches
What the top hydraulic fluid port of formula balanced valve 5 (specific structure and feature are referring to patent CN 208474223U) connect hydraulic press master cylinder 7 has bar
Chamber, lower part hydraulic fluid port connect the oil outlet of the small flow gear pump 3 of duplex gear pump, side oil outlet welding system fuel tank；Hydraulic press master cylinder 7
Rodless cavity connect the fast downlink pressure oil-in of stoste press system；The rod chamber of master cylinder 7 is also turned on stoste press system
The top hydraulic fluid port of fast downlink oil return opening and flow matches formula balanced valve 5, is respectively used to fast downlink oil return and downlink is returned at a slow speed
Oil；The oil outlet of one termination duplex gear pump big flow gear pump 2 of two-position two-way solenoid valve 4, another terminating systems fuel tank；It is double
Join 2 oil outlet of gear pump high volume gear pump and connects 5 lower part hydraulic fluid port of flow matches formula balanced valve through check valve 6；Duplex gear pump is small
The oil outlet of flow gear pump 3 connects one end of two-position two-way solenoid valve 4 through a check valve 6 simultaneously；Servo motor 1 connects duplicate gear
Pump.
Big flow gear pump 2 is identical as the rated operating pressure of small flow gear pump 3.
The revolving speed of servo motor 1 is adjustable, is balanced by adjusting the revolving speed of servo motor 1 to adjust into flow matches formula
The oil mass of valve 5, to control position or the speed of hydraulic press master cylinder 7.
Position sensor is installed on hydraulic press master cylinder 7.
Referring to Fig. 1, when system starts, by original system (see the hydraulic system in Fig. 1 in the dotted line frame of the right)
High pressure oil is provided to the rodless cavity of hydraulic press master cylinder 7, the rod chamber of hydraulic press master cylinder 7 also connects the oil return line of original system, system
Fast downlink starts pressing component；After pressing component is to certain distance, system issues instruction, is switched to descending phase at a slow speed.
At this point, the pressure oil circuit that original system is connected to 7 rodless cavity of hydraulic press master cylinder still remains up work, 7 rod chamber oil return oil of master cylinder
Road is switched in flow matches formula servo-system, and servo motor 1 is started to work simultaneously, and solenoid valve is in cut-off working position, double
The lower part hydraulic fluid port fuel feeding that connection gear pump is started to work to flow matches formula balanced valve 5, the oil stream amount that goes out for controlling 7 rod chamber of master cylinder are
The downstream rate of master cylinder is controlled, hydraulic press master cylinder 7 starts downlink at a slow speed；When having gone downwards to designated position at a slow speed, controller is again
Secondary sending instruction, solenoid valve 4 are switched to conducting position, duplicate gear pump high volume gear pump and system fuel tank are connected, big flow
Gear pump idle running, small flow gear pump 3 keep work, start to give flow matches formula servo-system small flow fuel feeding, hydraulic owner
Cylinder 7 continues with smaller speed downlink at a slow speed, and until reaching designated position, then system issues instruction, and servo motor 1 stops work
Make.
In the descending phase at a slow speed of hydraulic press master cylinder 7, when system needs only stop to flow in given position locking
Lower part hydraulic fluid port fuel feeding with formula balanced valve 5, the one-way locking inside flow matches formula balanced valve 5 can be by 7 rod chamber of master cylinder
Oil circuit is shut, to realize hydraulic press master cylinder 7 in the locking of current location.
When completing workpiece compacting, when 7 fast uplink of hydraulic press master cylinder being needed to reset, system issues instruction, is switched to former system
The fast uplink oil circuit of system, to the rod chamber fuel feeding of hydraulic press master cylinder 7, the rodless cavity welding system fuel tank of hydraulic press master cylinder 7, then liquid
Press master cylinder 7 can fast uplink.With this cycle operation.
Above specific embodiment has carried out the purpose of the present invention, technical scheme and beneficial effects further detailed
Explanation, it should be understood that the above is only specific embodiments of the present invention, are not intended to limit the scope of protection of the present invention.It is special
It does not point out, it is to those skilled in the art, all within the spirits and principles of the present invention, any modification for being made, equivalent
Replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of hydraulic motor servo-controlled system of flow matches formula, which is characterized in that including flow matches formula balanced valve, two two
Three-way electromagnetic valve, servo motor, system fuel tank, duplex gear pump and hydraulic press master cylinder；Duplex gear pump includes a big flow
Gear pump and one small flow gear pump, big flow gear pump and small flow gear pump are equipped with oil outlet；Flow matches formula is flat
The valve that weighs is equipped with top hydraulic fluid port, lower part hydraulic fluid port and side oil outlet, the top hydraulic fluid port connection master cylinder of flow matches formula balanced valve
Rod chamber, lower part hydraulic fluid port are connected to the oil outlet of small flow gear pump, and side oil outlet connects system fuel tank；Big flow gear pumps out
Hydraulic fluid port connects the lower part hydraulic fluid port of flow matches formula balanced valve through check valve；The oil outlet and two-position two-way solenoid valve of small flow gear pump
One end connection, and between small flow gear pump and two-position two-way solenoid valve be equipped with check valve；One end of two-position two-way solenoid valve
Connect the oil outlet of duplicate gear pump high volume gear pump, another terminating systems fuel tank；Servo motor connects duplex gear pump.
2. the hydraulic motor servo-controlled system of flow matches formula according to claim 1, which is characterized in that big flow gear pump with it is small
The rated operating pressure of flow gear pump is identical.
3. the hydraulic motor servo-controlled system of flow matches formula according to claim 1, which is characterized in that the revolving speed of servo motor can
It adjusts, the oil mass into flow matches formula balanced valve is adjusted by adjusting the revolving speed of servo motor, to control hydraulic press master cylinder
Position or speed.
4. according to the hydraulic motor servo-controlled system of flow matches formula of claims 1, which is characterized in that pacify on hydraulic press master cylinder
Equipped with position sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910203844.9A CN109773103A (en) | 2019-03-18 | 2019-03-18 | Flow matching type hydraulic machine servo control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910203844.9A CN109773103A (en) | 2019-03-18 | 2019-03-18 | Flow matching type hydraulic machine servo control system |
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| Publication Number | Publication Date |
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| CN109773103A true CN109773103A (en) | 2019-05-21 |
Family
ID=66488353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910203844.9A Pending CN109773103A (en) | 2019-03-18 | 2019-03-18 | Flow matching type hydraulic machine servo control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113294396A (en) * | 2021-05-27 | 2021-08-24 | 美通重工有限公司 | Diesel crank arm lifting platform operation hydraulic system |
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| CN202789784U (en) * | 2012-08-09 | 2013-03-13 | 郑州新大方重工科技有限公司 | Hydraulic system with fine adjustment function |
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| CN107152423A (en) * | 2017-06-17 | 2017-09-12 | 无锡德林防务装备股份有限公司 | Closed type hydraulic system with balanced valve |
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| CN209697934U (en) * | 2019-03-18 | 2019-11-29 | 杭州诺祥科技有限公司 | Flow matching type hydraulic machine servo control system |
| US20200230690A1 (en) * | 2017-02-23 | 2020-07-23 | Zhongkejuxin Clean Energy & Hot Forging Equipment Research and Development Co. Ltd. | Hydraulic Forging Machine And Method Of Replacing Upper Anvil Thereof |
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2019
- 2019-03-18 CN CN201910203844.9A patent/CN109773103A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030159599A1 (en) * | 2000-03-06 | 2003-08-28 | Nobuaki Ariji | Device and method for controlling stop of hydraulic press and device and method for detecting trouble of speed selector valve |
| CN101712207A (en) * | 2009-09-08 | 2010-05-26 | 广东工业大学 | High performance and energy-saving double-acting hydrostatic press driven by servo motor |
| CN102430680A (en) * | 2011-10-25 | 2012-05-02 | 中南大学 | Super-slow hydraulic system for synchro-driven die-forging hydraulic press |
| CN202789784U (en) * | 2012-08-09 | 2013-03-13 | 郑州新大方重工科技有限公司 | Hydraulic system with fine adjustment function |
| CN204914641U (en) * | 2015-09-06 | 2015-12-30 | 南京埃斯顿自动化股份有限公司 | Two -way pump control hydraulic system of electromechanical servo quick jar of liquid of oil pressure |
| WO2018090352A1 (en) * | 2016-11-20 | 2018-05-24 | 陈良娟 | Pressure relief device for hydraulic machine |
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| CN108488114A (en) * | 2018-05-04 | 2018-09-04 | 贵阳海之力液压有限公司 | A kind of pump control hydraulic transmission system applied to exoskeleton robot |
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| CN109356897A (en) * | 2018-11-30 | 2019-02-19 | 杭州诺祥科技有限公司 | Flow matching type balance and energy recovery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113294396A (en) * | 2021-05-27 | 2021-08-24 | 美通重工有限公司 | Diesel crank arm lifting platform operation hydraulic system |
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