CN106122186B - A kind of hydraulic system for realizing the stepless accurate speed governing of hydraulic press - Google Patents
A kind of hydraulic system for realizing the stepless accurate speed governing of hydraulic press Download PDFInfo
- Publication number
- CN106122186B CN106122186B CN201610744844.6A CN201610744844A CN106122186B CN 106122186 B CN106122186 B CN 106122186B CN 201610744844 A CN201610744844 A CN 201610744844A CN 106122186 B CN106122186 B CN 106122186B
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- Prior art keywords
- way valve
- adjusting module
- speed adjusting
- mouths
- wide range
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a kind of hydraulic systems for realizing the accurate speed governing of hydraulic press large-scale stepless, mainly include main pump source, auxiliary pumping source, a wide range of speed adjusting module, small range speed adjusting module, the first two-way valve, the second two-way valve, third two-way valve, main hydraulic cylinder and sliding block.The combination application in ratio variable-flow main pump source, a wide range of speed adjusting module and small range speed adjusting module so that the present invention has three-step timing function, and speed adjustable range is wide, precision is high, is fully able to the various work requirements for meeting hydraulic press；The restriction loss of hydraulic system is few, has preferable energy conservation characteristic.
Description
Technical field
The present invention relates to a kind of liquid for the hydraulic system, particularly great tonnage hydraulic machine for realizing the stepless accurate speed governing of hydraulic press
Press governing system.
Background technology
The hydraulic press of hydraulic press, particularly large-tonnage, due to its specific operating mode, it usually needs stepless in very wide range
How accurate speed governing accomplishes that the speed adjusting in accurate, a wide range of is must take into consideration in the design of Hydraulic System of hydraulic press
One key factor.
Invention content
Hydraulic press stepless accurate speed governing can be effectively realized in order to solve the above technical problem, the present invention provides a kind of
Hydraulic system.
The technical solution adopted by the present invention to solve the technical problems is as follows：
A kind of hydraulic system for realizing the stepless accurate speed governing of hydraulic press of the present invention, it is characterized in that：Including main pump source, auxiliary pump
Source, a wide range of speed adjusting module, small range speed adjusting module, the first two-way valve, the second two-way valve, third two-way valve, main liquid
Cylinder pressure and sliding block, the oil outlet in main pump source are connected with the A mouths of the first two-way valve and the P mouths of third two-way valve, and the three or two
The A mouths of pass ball valve are connected with the A mouths and main hydraulic cylinder of the second two-way valve, assist the oil outlet of pumping source and a wide range of speed governing mould
The P mouths of block and the P mouths connection of small range speed adjusting module, the A mouths of a wide range of speed adjusting module connect with the P mouths of the first two-way valve
Logical, the A mouths of small range speed adjusting module are connected with the P mouths of the second two-way valve, the T mouths and small range tune of a wide range of speed adjusting module
The T mouths of fast module connect fuel tank, and main hydraulic cylinder is mechanically coupled together with sliding block.
Further, the main pump source has ratio variable-flow function, can be AC asynchronous motor band ratio pump group,
Servomotor band quantifies pump group or servomotor band ratio pump group.
Further, a wide range of speed adjusting module of the present invention can be big flow ratio valve group, big flow servo valve group
Or big flow servo ratio valve group.
Further, small range speed adjusting module of the present invention can be small flow proportional valve group, small flow servo valve group
Or small flow servo ratio valve group.
Further, the first two-way valve of the present invention, the second two-way valve, third two-way valve can be with phase
The inserting valve group of congenerous.
Further, pressure sensor on the connecting line of main hydraulic cylinder of the present invention is housed, is filled on main hydraulic cylinder
There is displacement sensor, realize that the hydraulic system of the stepless accurate speed governing of hydraulic press further includes PLC control system, PLC control system is led to
Cross signal wire respectively with main pump source, a wide range of speed adjusting module, small range speed adjusting module, the first two-way valve, the second two-way valve,
Third two-way valve, pressure sensor are connected with displacement sensor.
Compared with prior art, beneficial effects of the present invention are as follows：
1st, the combination application of ratio variable-flow main pump source, a wide range of speed adjusting module and small range speed adjusting module so that this hair
Bright to have three-step timing function, i.e., pump controls speed-regulating function, large-scale valve controlled velocity modulation function and small-scale valve controlled velocity modulation work(
Can, speed adjustable range is wide, precision is high, is fully able to the various work requirements for meeting hydraulic press.
2nd, three-step timing function of the invention, not only so that hydraulic tools are for the accurate speed-regulating function of large-scale stepless, and
And the restriction loss of hydraulic system also substantially reduces, energy conservation characteristic greatly improves.
Description of the drawings
Fig. 1 is the principle of the present invention figure.
Fig. 2 is a kind of realization principle figure of a wide range of speed adjusting module.
Fig. 3 is a kind of realization principle figure of small range speed adjusting module.
Fig. 4 is the schematic diagram using a kind of electrohydraulic control system of the present invention.
Fig. 5 is for the present invention in low speed work into the speed control schematic diagram in stage.
In Fig. 1：1. main pump source, 2. auxiliary pumping sources, 3. a wide range of speed adjusting modules, 4. small range speed adjusting modules, 5. the 1st
Pass ball valve, 6. second two-way valves, 7. third two-way valves, 8. main hydraulic cylinders, 9. sliding blocks.
In Fig. 4：1. main pump source, 2. auxiliary pumping sources, 3. big orifice servo proportions, 4. small latus rectum servo proportions, 5. the
One two-way valve, 6. second two-way valves, 7. third two-way valves, 8. main hydraulic cylinders, 9. sliding blocks, 10. pressure sensors, 11.
Displacement sensor, 12. man-machine interfaces, 13.PLC control systems.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
Referring to Fig. 1, the invention mainly comprises：Main pump source 1, auxiliary pumping source 2, a wide range of speed adjusting module 3, small range speed governing mould
Block 4, the first two-way valve 5, the second two-way valve 6, third two-way valve 7, main hydraulic cylinder 8 and sliding block 9, main pump source 1 it is fuel-displaced
Mouth is connected with the A mouths of the first two-way valve 5 and the P mouths of third two-way valve 7, A mouths and the second two-way of third two-way valve 7
The A mouths and main hydraulic cylinder 8 of ball valve 6 connect, and assist the oil outlet of pumping source 2 and the P mouths and small range of a wide range of speed adjusting module 3
The P mouths connection of speed adjusting module 4, the A mouths of a wide range of speed adjusting module 3 are connected with the P mouths of the first two-way valve 5, small range speed governing mould
The A mouths of block 4 are connected with the P mouths of the second two-way valve 6, the T mouths of a wide range of speed adjusting module 3 and the T mouths of small range speed adjusting module 4
Fuel tank is connected, main hydraulic cylinder 8 and sliding block 9 are mechanically coupled together.
Referring to Fig. 2, a wide range of speed adjusting module 3 of the present invention can be realized by a big orifice servo proportion, such as
Using 25 latus rectum 4WRVE type servo proportions of German Rexroth companies.
Referring to Fig. 3, small range speed adjusting module 4 of the present invention can be realized by one small latus rectum servo proportion, such as
Using 6 latus rectum 4WRREH type servo proportions of German Rexroth companies.
Latus rectum servo proportion small shown in big orifice servo proportion shown in Fig. 2 and Fig. 3 is applied to the present invention,
A kind of schematic diagram of typical electrohydraulic control system is as shown in Figure 4.
Referring to Fig. 4, the pressure in main hydraulic cylinder 8 of the present invention can be surveyed by the pressure sensor 10 being mounted on pipeline
, the displacement of main hydraulic cylinder 8 can be as measured by the displacement sensor 11 being mounted on main hydraulic cylinder 8, and man-machine interface 12 is mainly negative
Duty input and some basic parameters of display hydraulic press, it is communicated between PLC control system 13 by bus, PLC controls
System 13 processed be mainly responsible for the action control of hydraulic press, data acquisition etc. work, PLC control system 13 by AI modules acquire come
From the pressure signal of pressure sensor 10 and the displacement signal from displacement sensor 11, PLC control system 13 pass through DO moulds
Block controls the magnet switching of the first two-way valve 5, the second two-way valve 6 and third two-way valve 7, and PLC control system 13 is logical
Cross flow, the opening of big orifice servo proportion 3 and the opening of small latus rectum servo proportion 4 in AO modules control main pump source 1.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, operation principle of the invention is as follows：
In low speed work into the stage, PLC control system 13 controls the first two-way valve 5, the second two-way valve by DO modules
6th, the electromagnet of third two-way valve 7 obtains electric or power-off：The defeated of main pump source 1 is depended on by the flow of third two-way valve 7
Outflow and the flow by big orifice servo proportion 3, the two are controlled by PLC control system 13；Pass through the two or two
The flow of pass ball valve 6 is determined by the flow of small latus rectum servo proportion 4, which is equally controlled by PLC control system 13
System；Total driving flow is used as by the resultant flow of 7 and second two-way valve 6 of third two-way valve and enters main hydraulic cylinder 8, is driven
Dynamic main hydraulic cylinder 8 is run down；So that hydraulic press is run according to preset displacement-rate curve.
Referring to Fig. 5, the present invention low speed work into speed control principle it is as follows：
PLC control system 13 passes through AI modules displacement signal of the acquisition from displacement sensor 11, and calculate phase in real time
The speed signal answered tables look-up to obtain current speed command according to current displacement signal and preset displacement-rate curve,
Gained speed command obtains present speed deviation compared with present speed, and controller receives speed command and velocity deviation simultaneously,
And flow instruction, open order 3 and open order 4 are calculated according to certain control algolithm, the output in main pump source 1 is controlled respectively
The opening of flow, the opening of big orifice servo proportion 3 and small latus rectum servo proportion 4, the output flow in main pump source 1 lead to
Cross the flow of big orifice servo proportion 3 and the flow of small latus rectum servo proportion 4 goes driving to lead as total driving flow
Hydraulic cylinder 8 so that hydraulic press is run according to preset displacement-rate curve.
It should be noted that：It is shown in fig. 5 the present invention low speed work into the stage speed control schematic diagram and on state
It is bright to be all based on electrohydraulic control system shown in Fig. 4.
Claims (1)
1. a kind of hydraulic system for realizing the stepless accurate speed governing of hydraulic press, it is characterized in that：Including main pump source (1), auxiliary pumping source
(2), a wide range of speed adjusting module (3), small range speed adjusting module (4), the first two-way valve (5), the second two-way valve (6), third
Two-way valve (7), main hydraulic cylinder (8) and sliding block (9), the oil outlet of main pump source (1) and the A mouths of the first two-way valve (5) and
The P mouths connection of third two-way valve (7), A mouths and the A mouths of the second two-way valve (6) and the main hydraulic pressure of third two-way valve (7)
Cylinder (8) connects, oil outlet and the P mouths of a wide range of speed adjusting module (3) and the P of small range speed adjusting module (4) of auxiliary pumping source (2)
Mouth connection, the A mouths of a wide range of speed adjusting module (3) are connected with the P mouths of the first two-way valve (5), the A of small range speed adjusting module (4)
Mouth is connected with the P mouths of the second two-way valve (6), the T mouths of a wide range of speed adjusting module (3) and the T mouths of small range speed adjusting module (4)
Fuel tank is connected, main hydraulic cylinder (8) and sliding block (9) are mechanically coupled together；The main pump source (1) has ratio variable-flow work(
Can, it is that AC asynchronous motor quantifies one of pump group or servomotor with ratio pump group with ratio pump group, servomotor band
Kind；The a wide range of speed adjusting module (3) is big flow servo ratio valve group；The small range speed adjusting module (4) is that small flow is watched
Take ratio valve group；First two-way valve (5), the second two-way valve (6), third two-way valve (7) are with identical function
Inserting valve group；It is equipped on (8) equipped with pressure sensor (10), main hydraulic cylinder on the connecting line of the main hydraulic cylinder (8)
Displacement sensor (11) realizes that the hydraulic system of the stepless accurate speed governing of hydraulic press further includes PLC control system (13), PLC controls
System (13) by signal wire respectively with main pump source (1), a wide range of speed adjusting module (3), small range speed adjusting module (4), the one or two
Pass ball valve (5), the second two-way valve (6), third two-way valve (7), pressure sensor (10) and displacement sensor (11) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744844.6A CN106122186B (en) | 2016-08-29 | 2016-08-29 | A kind of hydraulic system for realizing the stepless accurate speed governing of hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744844.6A CN106122186B (en) | 2016-08-29 | 2016-08-29 | A kind of hydraulic system for realizing the stepless accurate speed governing of hydraulic press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106122186A CN106122186A (en) | 2016-11-16 |
| CN106122186B true CN106122186B (en) | 2018-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610744844.6A Active CN106122186B (en) | 2016-08-29 | 2016-08-29 | A kind of hydraulic system for realizing the stepless accurate speed governing of hydraulic press |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107120328A (en) * | 2017-04-26 | 2017-09-01 | 天津市天锻压力机有限公司 | The process control system and control method of isothermal forging hydropress |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006132031A1 (en) * | 2005-06-06 | 2006-12-14 | Shin Caterpillar Mitsubishi Ltd. | Drive device for rotation, and working machine |
| CN202579475U (en) * | 2012-05-22 | 2012-12-05 | 三河沃达液压控制***有限公司 | Hydraulic servo unit |
| CN103286250B (en) * | 2013-05-22 | 2017-11-03 | 天津市天锻压力机有限公司 | The control system and its control method of hydraulic forging press pump group flow |
| CN204591851U (en) * | 2015-04-30 | 2015-08-26 | 南京埃尔法电液技术有限公司 | Multistage flow pressure compound control system |
| CN204658877U (en) * | 2015-06-03 | 2015-09-23 | 周建红 | Digital ratio equation many closed loops electrohydraulic servo-controlling system |
| CN104999695B (en) * | 2015-06-15 | 2016-09-28 | 浙江大学 | A kind of electrohydraulic control system realizing hydraulic press Ultra-Low Speed stable operation |
| CN206530575U (en) * | 2016-08-29 | 2017-09-29 | 南通锻压设备股份有限公司 | A kind of hydraulic system for realizing the stepless accurate speed governing of hydraulic press |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180814 Address after: 226503 Jiangsu Nantong Rugao North Road Park North Road (economic and Technological Development Zone Forging Industry Park) Patentee after: Nantong forging equipment Rugao Co., Ltd. Address before: 226500 Jiangsu Nantong Rugao Economic Development Zone Forging Industry Park Patentee before: Nantong Forging Equipment Co., Ltd. |
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