CN202811580U - Pressure servo controller of oil press - Google Patents

Pressure servo controller of oil press Download PDF

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Publication number
CN202811580U
CN202811580U CN 201220492669 CN201220492669U CN202811580U CN 202811580 U CN202811580 U CN 202811580U CN 201220492669 CN201220492669 CN 201220492669 CN 201220492669 U CN201220492669 U CN 201220492669U CN 202811580 U CN202811580 U CN 202811580U
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CN
China
Prior art keywords
valve
oil
pressure
way
fuel tank
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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.)
Expired - Fee Related
Application number
CN 201220492669
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Chinese (zh)
Inventor
刘力
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China and Canton Clutch Co Ltd
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China and Canton Clutch Co Ltd
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Priority to CN 201220492669 priority Critical patent/CN202811580U/en
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Publication of CN202811580U publication Critical patent/CN202811580U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a pressure servo controller of an oil press. The pressure servo controller of the oil press is capable of controlling the pressure, the flow and the direction of liquid stream continuously and proportionally according to a given input signal, and is used for continuous control or procedure control of a hydraulic pressure parameter and improving controllability and stability of an oil pressure system effectively. According to the pressure servo controller of the oil press, a proportional valve is arranged in the oil pressure system, a signal is input in the proportional valve according to practical work in an operation process, the proportional valve controls the pressure or the flow of the liquid stream in the system continuously and proportionally according to the given signal, and further extending or retracting of an oil cylinder piston is controlled effectively, and operability and stability of the whole system are good. The pressure servo controller of the oil press is widely used in the oil press servo control field.

Description

The pressure servo control of oil hydraulic press
Technical field
The utility model relates to a kind of pressure servo control of oil hydraulic press.
Background technique
At present, the action of a lot of machines (such as numerical control machine tool, punch press, forging bed etc.) all is by oil hydraulic press and hydraulic system, moves with the various process cycles of finishing press by the control of electrical system.Four post oil hydraulic presses be a kind of by specific hydraulic fluid as working medium, by oil hydraulic pump as power source, active force by pump makes hydraulic oil enter oil cylinder/piston by hydraulic plumbing system, then several groups of Sealings of working in coordination are arranged in oil cylinder/piston, the sealing of diverse location all is different, but all play the effect of sealing, hydraulic oil can not be revealed.It can be converted into mechanical energy with oil pressure, and hydraulic transmission is a kind of kind of drive of utilizing fluid pressure to come transferring power and control.
Hydraulic plumbing system under the prior art, flow and the direction of controlling hydraulic oil by general solenoid valve mostly, but the control response speed of general solenoid valve is slow, and the ability that does not have control hydraulic oil speed, when solenoid valve gets dead electricity, stretching out or bouncing back of cylinder piston rod just produces larger cushion effect easily, so cause easily working pressure not reach specified value, pressure stability is poor, finally causes technological action precision homogeneity of product and difficult quality low, that produce to satisfy production requirement.In addition, the manufacturer that also has adds accumulator in hydraulic plumbing system, although can improve to a certain extent the stability of oil circuit pressure, but still have the shortcoming of control accuracy deficiency.
The model utility content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, a kind of pressure servo control of oil hydraulic press is provided, can be by the continuous pressure of controlling pari passu liquid stream of given input signal, flow and direction, be used for and will carry out continuous control or program control to hydraulic parameter, effectively improve pressurized oil system can be handling and stability.
The technological scheme that the utility model adopts is: the utility model comprises fuel tank, oil pump, oil circuit control module and oil cylinder, and described oil pump connects described oil cylinder through described oil circuit control module; Described oil circuit control module comprises two logical cartridge valves, liquid-filling valve, two-bit triplet solenoid valve, 3-position-3-way solenoid valve I, three position four-way electromagnetic valve and the Proportional valve that is electrically connected with outer signals; Described oil pump connects described fuel tank through described two logical cartridge valves; Described 3-position-3-way solenoid valve is connected in parallel between described two logical cartridge valves and the described fuel tank, is connected with low pressure regulating pressure valve therebetween; Described two-bit triplet solenoid valve, described Proportional valve are connected in parallel respectively between the output and described fuel tank of described oil pump; The output of described oil pump and two logical cartridge valves connect respectively described three position four-way electromagnetic valve, described three position four-way electromagnetic valve also connects respectively epicoele and the cavity of resorption of described oil cylinder by one-way valve I, one-way valve II, the epicoele of described oil cylinder connects fuel tank by described liquid-filling valve, the cavity of resorption of described oil cylinder connects fuel tank by hydraulically-controlled one-way valve, described hydraulically-controlled one-way valve is connected with the two-bit triplet solenoid valve, also is connected in parallel to sutaining valve between the cavity of resorption of described oil cylinder and the described three position four-way electromagnetic valve.
Preferably, described Proportional valve comprises valve body and is arranged on described valve body interior spool, coil, spring, armature and push rod, described armature is arranged in the described coil by described spring, described push rod is fixedly connected with described armature, described spool is fixedly connected with described push rod by pin, and described outer signals is electrically connected with described coil.
Preferably, be provided with oil meter between described one-way valve I and the described cylinder upper cavity oil.
Preferably, described outer signals comprises voltage signal or current signal.
The beneficial effects of the utility model are: because the utility model comprises fuel tank, oil pump, oil circuit control module and oil cylinder, described oil pump connects described oil cylinder through described oil circuit control module; Described oil circuit control module comprises two logical cartridge valves, liquid-filling valve, two-bit triplet solenoid valve, 3-position-3-way solenoid valve I, three position four-way electromagnetic valve and the Proportional valve that is electrically connected with outer signals; Described oil pump connects described fuel tank through described two logical cartridge valves; Described 3-position-3-way solenoid valve is connected in parallel between described two logical cartridge valves and the described fuel tank, is connected with low pressure regulating pressure valve therebetween; Described two-bit triplet solenoid valve, described Proportional valve are connected in parallel respectively between the output and described fuel tank of described oil pump; The output of described oil pump and two logical cartridge valves connect respectively described three position four-way electromagnetic valve, described three position four-way electromagnetic valve also connects respectively epicoele and the cavity of resorption of described oil cylinder by one-way valve I, one-way valve II, the epicoele of described oil cylinder connects fuel tank by described liquid-filling valve, the cavity of resorption of described oil cylinder connects fuel tank by hydraulically-controlled one-way valve, described hydraulically-controlled one-way valve is connected with the two-bit triplet solenoid valve, also is connected in parallel to sutaining valve between the cavity of resorption of described oil cylinder and the described three position four-way electromagnetic valve; Described Proportional valve is a kind of output quantity and the proportional hydrovalve of input signal, in the oil hydraulic press working procedure, can be by given input voltage or current signal continuously in proportion pressure, flow or the direction of liquid stream in the oil circuit control system, realize thus hydraulic parameter in the oil-way system is carried out continuous control or hommization program control, effectively control the operability and stability of pressurized oil system.
Description of drawings
Fig. 1 is hydraulic schematic diagram of the present utility model;
Fig. 2 is the structural representation of Proportional valve in the utility model;
Fig. 3 is the fundamental diagram of Proportional valve in the utility model.
Embodiment
As shown in Figure 1, the utility model comprises fuel tank 1, oil pump 2, oil circuit control module and oil cylinder 3, and described oil pump 2 connects described oil cylinder 3 through described oil circuit control module, and the output terminal of described oil cylinder 3 is used for the objects such as control force, displacement and speed.Described oil circuit control module comprises two logical cartridge valves 4, two-bit triplet solenoid valve 5,3-position-3-way solenoid valve 6, three position four-way electromagnetic valve 7, liquid-filling valve 8 and the Proportional valve 9 that is electrically connected with outer signals; Described oil pump 2 connects described fuel tank through described two logical cartridge valves 4; Described 3-position-3-way solenoid valve 6 is connected in parallel between described two logical cartridge valves 4 and the described fuel tank 1, is connected with low pressure regulating pressure valve 10 therebetween, and described low pressure regulating pressure valve 10 is used for the pressure control to whole oil-way system; Described two-bit triplet solenoid valve 5, described Proportional valve 9 are connected in parallel respectively between the output and described fuel tank 1 of described oil pump 2, also are provided with one-way valve III 21 between the output of described oil pump 2 and the described two-bit triplet solenoid valve 5; The output of described oil pump 2, described two logical cartridge valves 4 connect respectively described three position four-way electromagnetic valve 7, described three position four-way electromagnetic valve 7 also connects respectively epicoele 31 and the cavity of resorption 32 of described oil cylinder 3 by one-way valve I 11, one-way valve II 12, the epicoele 31 of described oil cylinder 3 connects fuel tank 1 by described liquid-filling valve 8, the cavity of resorption 32 of described oil cylinder 3 connects described fuel tank 1 by hydraulically-controlled one-way valve 13, described hydraulically-controlled one-way valve 13 is connected with described two-bit triplet solenoid valve 5, also is connected in parallel to sutaining valve 14 between the cavity of resorption 32 of described oil cylinder 3 and the described three position four-way electromagnetic valve 7.Be provided with oil meter 20 between the epicoele 31 of described one-way valve I 11 and described oil cylinder.
As shown in Figure 2, described Proportional valve 9 is a kind of valve bodies according to the electromagnetic principle design, the mechanical energy of its generation is directly proportional with the size of the outer signals of input, the again displacement of continuous control hydraulic valve core, and then pressure, direction and the flow of realization continuous control hydraulic system, and described outer signals commonly used comprises voltage signal or current signal, and preferably between 0 to 10 volt, the ratio of current signal is preferably between 0 to 20 milliampere for the ratio of voltage signal.Described Proportional valve 9 comprises valve body and is arranged on described valve body interior spool, coil 15, spring 16, armature 17 and push rod 18, described armature 17 is arranged in the described coil 15 by described spring 16, described push rod 18 is fixedly connected with described armature 17, described spool is fixedly connected with described push rod 18 by pin 19, and described outer signals is electrically connected with described coil 15.When having current signal to input described coil 15, magnetic field in the described coil 15 is to described armature 17 generation effects, the size and Orientation of electric current is proportional in the displacement size and Orientation of described armature 17 and the magnetic field, form and transport continuously, drive described pin 19 motions by the described push rod 18 that is fixed together again, thereby control the motion of described spool, realized the efficient control to hydraulic fluid flow rate, thereby the hydraulic work of whole system is stablized more.
As shown in Figure 3, be the fundamental diagram of Proportional valve.Demand according to real work, be input voltage signal or current signal by input instruction 22 people, then through mechanical transducer 23 mechanical quantity that the Proportional valve 25 in the hydraulic system 24 can read is changed and be enlarged into to input signal, control thus the parameters such as pressure, direction and flow of fluid in the hydraulic system 24, and then with control oil cylinder or the control objects 27 such as motor 26 efficient control action power, displacement and speed.
Specific operation stroke of the present utility model is as follows:
Electric motor starting when pressing start button, the equal no electric circuit of all solenoid valves this moment, the fluid of described oil pump 2 outputs flows back to fuel tank by described two logical cartridge valves, and system is unloading condition.Both hands are by behind " compacting " button, electromagnet YA1, YA3, YA4 switch on simultaneously at this moment, the fluid of described oil pump output enters the epicoele 31 of described oil cylinder 3 through described three position four-way electromagnetic valve 7, one-way valve I 11, because electromagnet YA3 energising, so the cavity of resorption 31 of described oil cylinder 3 flows back to fuel tank 1 through described hydraulically-controlled one-way valve 13, rely on the slide block deadweight descending fast, the epicoele 31 of described oil cylinder 3 produced negative pressure and inhaled out described liquid-filling valve 8 this moment, and a large amount of fluid are filled up the epicoele 31 of described oil cylinder 3.After slide block down is met position limit switch SQ2, electromagnet YA3 outage, the abutment pressure that the fluid of the cavity of resorption 32 of described oil cylinder 3 overcomes described sutaining valve 14 overflows back fuel tank 1, makes slide block descending at a slow speed, forms slide block and presses down slowly the braking work.When the pressure rise of system oil-way sender in limited time to the pressure gauge 20, electromagnet YA1, electromagnet YA2 in the time of the YA4 dead electricity, the YA5 energising, this moment, system pressure was set up by described low pressure regulating pressure valve 10, described oil pump 2 output fluid are driven described liquid-filling valve 8 through band behind the three position four-way electromagnetic valve 7 and are carried out release, treat that the pressure drop of described cylinder upper cavity oil 31 is to the lower sender in limited time of pressure gauge 20, electromagnet YA2 outage is electromagnet YA1 simultaneously, the YA5 energising, the fluid of described oil pump 2 outputs is through described three position four-way electromagnetic valve 7, described one-way valve II 12 enters the cavity of resorption 32 of described oil cylinder 3, epicoele 31 oil extractions are flowed back to fuel tank through described liquid-filling valve 8, realize the fast backhaul action of words, sender when SQ3 is met in the slide block backhaul, all electromagnet outages, one time do action finishes.In whole operational stroke, the effect of described Proportional valve is: input a kind of signal according to real work in described Proportional valve 9, described Proportional valve 9 is according to given input signal continuously in proportion pressure or the flow of liquid stream in the control system, and then control efficiently stretching out or bouncing back of oil cylinder piston, so that whole system has good operability and stability.
The utility model is widely used in oil pressure servocontrol field.

Claims (4)

1. the pressure servo of oil hydraulic press control is characterized in that: comprise fuel tank, oil pump, oil circuit control module and oil cylinder, described oil pump connects described oil cylinder through described oil circuit control module; Described oil circuit control module comprises two logical cartridge valves, liquid-filling valve, two-bit triplet solenoid valve, 3-position-3-way solenoid valve I, three position four-way electromagnetic valve and the Proportional valve that is electrically connected with outer signals; Described oil pump connects described fuel tank through described two logical cartridge valves; Described 3-position-3-way solenoid valve is connected in parallel between described two logical cartridge valves and the described fuel tank, is connected with low pressure regulating pressure valve therebetween; Described two-bit triplet solenoid valve, described Proportional valve are connected in parallel respectively between the output and described fuel tank of described oil pump; The output of described oil pump and two logical cartridge valves connect respectively described three position four-way electromagnetic valve, described three position four-way electromagnetic valve also connects respectively epicoele and the cavity of resorption of described oil cylinder by one-way valve I, one-way valve II, the epicoele of described oil cylinder connects fuel tank by described liquid-filling valve, the cavity of resorption of described oil cylinder connects fuel tank by hydraulically-controlled one-way valve, described hydraulically-controlled one-way valve is connected with the two-bit triplet solenoid valve, also is connected in parallel to sutaining valve between the cavity of resorption of described oil cylinder and the described three position four-way electromagnetic valve.
2. the pressure servo of oil hydraulic press according to claim 1 control, it is characterized in that: described Proportional valve comprises valve body and is arranged on described valve body interior spool, coil, spring, armature and push rod, described armature is arranged in the described coil by described spring, described push rod is fixedly connected with described armature, described spool is fixedly connected with described push rod by pin, and described outer signals is electrically connected with described coil.
3. the pressure servo of oil hydraulic press according to claim 1 control is characterized in that: be provided with oil meter between described one-way valve I and the described cylinder upper cavity oil.
4. the pressure servo of oil hydraulic press according to claim 1 and 2 control, it is characterized in that: described outer signals comprises voltage signal or current signal.
CN 201220492669 2012-09-26 2012-09-26 Pressure servo controller of oil press Expired - Fee Related CN202811580U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220492669 CN202811580U (en) 2012-09-26 2012-09-26 Pressure servo controller of oil press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220492669 CN202811580U (en) 2012-09-26 2012-09-26 Pressure servo controller of oil press

Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105673590A (en) * 2016-03-10 2016-06-15 李阳 Pressing machine control method, oil way control system and pressing machine
CN106584914A (en) * 2016-12-08 2017-04-26 太原重型机械集团工程技术研发有限公司 Pressure applying equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105673590A (en) * 2016-03-10 2016-06-15 李阳 Pressing machine control method, oil way control system and pressing machine
CN106584914A (en) * 2016-12-08 2017-04-26 太原重型机械集团工程技术研发有限公司 Pressure applying equipment
CN106584914B (en) * 2016-12-08 2019-03-15 太原重型机械集团工程技术研发有限公司 Pressure application devices

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130320

Termination date: 20200926

CF01 Termination of patent right due to non-payment of annual fee