CN202088514U - Hydraulic circuit of large-size hydraulic machine comprising novel supercharger - Google Patents
Hydraulic circuit of large-size hydraulic machine comprising novel supercharger Download PDFInfo
- Publication number
- CN202088514U CN202088514U CN2011201066510U CN201120106651U CN202088514U CN 202088514 U CN202088514 U CN 202088514U CN 2011201066510 U CN2011201066510 U CN 2011201066510U CN 201120106651 U CN201120106651 U CN 201120106651U CN 202088514 U CN202088514 U CN 202088514U
- Authority
- CN
- China
- Prior art keywords
- reversal valve
- main pump
- hydraulic circuit
- valve
- new type
- Prior art date
- 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
Links
Images
Landscapes
- Control Of Presses (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The utility model discloses a hydraulic circuit of a large-size hydraulic machine comprising a novel supercharger, which comprises a main pump, the supercharger, a main cylinder and a return cylinder. The main pump converts oil pressure into high pressure by the aid of the supercharger, the high pressure is transmitted into the main cylinder via a first reversing valve so as to drive a press machine to descend to form a first stroke, the main pump supplies oil to the return cylinder by the aid of a second reversing valve to drive the press machine to ascend to form a return stroke, functions of the supercharger are mainly realized by means of driving a coaxial constant-displacement pump via a constant-displacement motor, the displacement of the constant-displacement motor is higher than that of the constant-displacement pump, and the first reversing valve and the second reversing valve are directional valves with high frequency response ratios. The hydraulic circuit realizes continuous uninterrupted supercharging of oil pressure by the aid of the high-constant-displacement motor driving the coaxial low-constant-displacement pump, realizes stable output oil pressure without impact, adjusts motion of a working slider and pressure of a hydraulic cylinder by the aid of the high-frequency-response-ratio valves with position feedback functions, is low in impact and high in efficiency and can guarantee sufficient position precision and control precision.
Description
Technical field
The utility model relates to a kind of large hydraulic press hydraulic circuit that adopts new type pressurized device.
Background technology
At present, hydraulic machinery is good because of security, and power is big, and characteristics such as efficient height make it be widely used in engineering reality, and the hydraulic circuit technology is one of key technology that realizes modernized transmission and control in hydraulic machinery.In the large hydraulic press course of work, the execution driving force that needs requires very high, therefore need make master cylinder obtain high driving force with this oil pressure pressurization of main pump confession, the pressurized cylinder of the traditional booster that uses will be realized the necessary supporting a plurality of direction valves of continuous supercharging at present, complex structure, and in the pressurized cylinder commutation, can occur impacting the output oil pressure instability; Realize the holding function requirement of hydraulic system for combination by valve, electrodeless automatic speed regulation by both forward and reverse directions, realize accurate position control, the most frequently used scheme has electrohydraulic servo valve at present, or proportional velocity regulating valve and solenoid directional control valve combination realization, succinct for the electrohydraulic servo valve loop, control performance and control accuracy height, but cost price height, service condition and environment for use aspect also are subjected to certain limitation, and be very strict as the fluid filtering accuracy is required, and must select high accuracy for use, performers such as highly sensitive servo-cylinder just can be given full play to the advantage of servo valve, have increased the cost of whole system; The mode that the combination of proportional velocity regulating valve and solenoid directional control valve approaches realizes servo-actuated location, but the hydraulic circuit complexity, because of the reason of flow speed control valve, in the pipeline and the pressure loss on the hydraulic valve also bigger, FAQs such as hydraulic pressure such as leakages grade is many relatively, and the zero-bit dead band is arranged.
The utility model content
At above-mentioned the deficiencies in the prior art part, the utility model provides a kind of large hydraulic press hydraulic circuit that adopts new type pressurized device, drives the supercharging that coaxial constant displacement pump is realized oil pressure, supercharging uninterruptedly by big discharge capacity fixed displacement motor, output pressure is stable, does not have and impacts; And the motion and the cylinder pressure of high frequency response proportioning valve adjusting work slide block by the band position feedback, impact for a short time, the efficient height can guarantee enough positional precisions and control accuracy.
To achieve these goals, the technical solution adopted in the utility model is: the large hydraulic press hydraulic circuit that adopts new type pressurized device, comprise main pump, booster, master cylinder, kicker cylinder, main pump is through booster, oil pressure is become high pressure, enter master cylinder through first reversal valve again, drive descending formation first process of press with this; Main pump is given the kicker cylinder fuel feeding through second reversal valve, drive the up formation backhaul of press, described booster mainly drives coaxial constant displacement pump by fixed displacement motor and realizes that wherein the discharge capacity of fixed displacement motor is greater than quantitative pump delivery, and described first reversal valve, second reversal valve are high frequency response proportion directional valve.
Preferably, also comprise second process, it is in parallel with first process.
Further preferred, described second process gives first reversal valve to master cylinder by the main pump DFF Direct Fuel Feed.
Further preferred, establish the 3rd reversal valve between the described main pump and first reversal valve.
Preferably, be provided with the 4th reversal valve between described main pump and the booster.
As one of preferred, described the 3rd reversal valve, the 4th reversal valve are the 2/2-way magnetic valve.
As one of preferred, on the oil-out of described main pump, be provided with overflow valve.
Preferably, on the described master cylinder by be connected with a upper oil cylinder towards the liquid valve.
Compared with prior art, the beneficial effect of this utility model: the utility model drives the continuously uninterrupted supercharging that coaxial float amount constant displacement pump is realized oil pressure by big discharge capacity fixed displacement motor, makes output oil pressure stable, does not have and impacts; And the motion and the cylinder pressure of high frequency response proportioning valve adjusting work slide block by the band position feedback, impact for a short time, the efficient height can guarantee enough positional precisions and control accuracy.
Description of drawings
Fig. 1 is the theory diagram of the utility model embodiment.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments.
Embodiment:
Referring to Fig. 1, this adopts the large hydraulic press hydraulic circuit of new type pressurized device to comprise main pump 1, booster, master cylinder 11, kicker cylinder 13, main pump 1 is through booster, low pressure oil is become hydraulic oil, be that main pump 1 mainly is by the 4th reversal valve 3 fuel feeding, drive big discharge capacity fixed displacement motor 7 and drive coaxial float amount constant displacement pump 6, the discharge capacity of this fixed displacement motor 7 is greater than the discharge capacity of constant displacement pump 6, produce hydraulic oil, enter master cylinder 11 through first reversal valve 8 again, drive press slide 12 descending formation first processes with this;
Also include second process, described second process is in parallel with first process, and main pump 1 gives first reversal valve 8 to master cylinder 11 by the 3rd reversal valve 4 fuel feeding low pressure oil, drives press slide 12 descending formation second processes with this.
On master cylinder 11 by be provided with a upper fuel tank 9 towards liquid valve 10, make 12 fast following times of press slide, when the hydraulic oil in first process or second process has little time to replenish master cylinder 11, make in the master cylinder 11 than 9 one-tenth negative pressure of upper fuel tank, the hydraulic oil of upper fuel tank 9 can be by giving master cylinder 11 repairings towards liquid valve 10, in the time of on press slide 12 is fast, hydraulic oil on the master cylinder 11 has little time when first process or second process are returned, can alleviate oil-feed or recirculating oil quantity in first process or second process by hydraulic oil being flow in the upper fuel tank 9 towards liquid valve 10.
In the utility model, described first reversal valve 8, second reversal valve 5 are for being with the high frequency response proportion directional valve of position feedback; The 3rd reversal valve 4, the 4th reversal valve 3 are the 2/2-way magnetic valve.On the oil-out of main pump 1, that is to say all to be provided with the overflow valve 2 that prevents system overload in first process, second process and the backhaul.
Operation principle of the present utility model: optionally drive press slide 12 descending formation processes to master cylinder 11 supply low pressure oil, hydraulic oil by the 3rd reversal valve 4, the 4th reversal valve 3, during backhaul, main pump 1 passes through second reversal valve 5 to kicker cylinder 13 fuel feeding, drive press slide 12 up formation, the process backhaul repeats back and forth, form the continuous operation of hydraulic press, upper fuel tank 9 is by giving master cylinder 11 repairings or oil return, the hydraulic pressure oil mass in the alleviation process towards liquid valve 10.
Drive the continuously uninterrupted supercharging that coaxial float amount constant displacement pump 6 is realized oil pressure by big discharge capacity fixed displacement motor 7, make output oil pressure stable, do not have and impact; And the motion and the cylinder pressure of high frequency response proportioning valve adjusting work slide block by the band position feedback, impact for a short time, the efficient height can guarantee enough positional precisions and control accuracy.
The above only is the detailed description of the utility model preferred embodiment and graphic, is not to be used for limiting the utility model, and the embodiment or the approximate construction of all similar variations of doing according to creation spirit of the present utility model all should be contained among the utility model.
Claims (8)
1. adopt the large hydraulic press hydraulic circuit of new type pressurized device, comprise main pump, booster, master cylinder, kicker cylinder, main pump becomes high pressure through booster with oil pressure, enters master cylinder through first reversal valve again, drives descending formation first process of press with this; Main pump is given the kicker cylinder fuel feeding through second reversal valve, drive the up formation backhaul of press, it is characterized in that: described booster mainly drives coaxial constant displacement pump by fixed displacement motor and realizes, wherein the discharge capacity of fixed displacement motor is greater than quantitative pump delivery, and described first reversal valve, second reversal valve are high frequency response proportion directional valve.
2. the large hydraulic press hydraulic circuit of the new type pressurized device of employing according to claim 1 is characterized in that: also comprise second process, it is in parallel with first process.
3. the large hydraulic press hydraulic circuit of the new type pressurized device of employing according to claim 2 is characterized in that: described second process gives first reversal valve to master cylinder by the main pump DFF Direct Fuel Feed.
4. the large hydraulic press hydraulic circuit of the new type pressurized device of employing according to claim 3 is characterized in that: establish the 3rd reversal valve between the described main pump and first reversal valve.
5. the large hydraulic press hydraulic circuit of the new type pressurized device of employing according to claim 1 is characterized in that: be provided with the 4th reversal valve between described main pump and the booster.
6. according to the large hydraulic press hydraulic circuit of claim 4 or the new type pressurized device of 5 described employings, it is characterized in that: described the 3rd reversal valve, the 4th reversal valve are the 2/2-way magnetic valve.
7. according to the large hydraulic press hydraulic circuit of claim 1 or the new type pressurized device of 4 described employings, it is characterized in that: on the oil-out of described main pump, be provided with overflow valve.
8. the large hydraulic press hydraulic circuit of the new type pressurized device of employing according to claim 1 is characterized in that: on the described master cylinder by be connected with a upper oil cylinder towards the liquid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201066510U CN202088514U (en) | 2011-04-13 | 2011-04-13 | Hydraulic circuit of large-size hydraulic machine comprising novel supercharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201066510U CN202088514U (en) | 2011-04-13 | 2011-04-13 | Hydraulic circuit of large-size hydraulic machine comprising novel supercharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202088514U true CN202088514U (en) | 2011-12-28 |
Family
ID=45363603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201066510U Expired - Fee Related CN202088514U (en) | 2011-04-13 | 2011-04-13 | Hydraulic circuit of large-size hydraulic machine comprising novel supercharger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202088514U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661157A (en) * | 2012-05-09 | 2012-09-12 | 凯盛重工有限公司 | Anchoring lock rise pressurizer for excavator |
| CN103486097A (en) * | 2013-10-10 | 2014-01-01 | 西安天宇重工有限公司 | Piston-type supercharger of large hydraulic machine |
| CN103511360A (en) * | 2013-09-06 | 2014-01-15 | 天津优瑞纳斯液压机械有限公司 | Hydraulic cylinder fast feeding system based on hydraulic servo closed-loop control |
| CN103522584A (en) * | 2013-10-22 | 2014-01-22 | 严培义 | Quantitative oil supply system of undershoot springback device of powder forming machine |
| CN104439005A (en) * | 2014-10-27 | 2015-03-25 | 燕山大学 | Power recovery matching type pump-controlled hydraulic control system of oil press |
| CN105665475A (en) * | 2016-04-25 | 2016-06-15 | 太原科技大学 | Thick plate pressing machine hydraulic system |
| CN106903284A (en) * | 2017-03-17 | 2017-06-30 | 重庆江东机械有限责任公司 | Response charging device and its control method high of large-scale high speed hydraulic press |
| CN114483712A (en) * | 2022-02-04 | 2022-05-13 | 浙江大学 | Hydraulic cylinder micro-internal leakage detection test bed and detection method thereof |
-
2011
- 2011-04-13 CN CN2011201066510U patent/CN202088514U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661157A (en) * | 2012-05-09 | 2012-09-12 | 凯盛重工有限公司 | Anchoring lock rise pressurizer for excavator |
| CN102661157B (en) * | 2012-05-09 | 2015-09-30 | 凯盛重工有限公司 | Development machine anchor lock rises and draws supercharging device |
| CN103511360A (en) * | 2013-09-06 | 2014-01-15 | 天津优瑞纳斯液压机械有限公司 | Hydraulic cylinder fast feeding system based on hydraulic servo closed-loop control |
| CN103511360B (en) * | 2013-09-06 | 2015-08-19 | 天津优瑞纳斯液压机械有限公司 | The quick feeding system of oil hydraulic cylinder based on hydraulic servo closed loop control |
| CN103486097A (en) * | 2013-10-10 | 2014-01-01 | 西安天宇重工有限公司 | Piston-type supercharger of large hydraulic machine |
| CN103522584A (en) * | 2013-10-22 | 2014-01-22 | 严培义 | Quantitative oil supply system of undershoot springback device of powder forming machine |
| CN103522584B (en) * | 2013-10-22 | 2015-05-13 | 宁波汇众粉末机械制造有限公司 | Quantitative oil supply system of undershoot springback device of powder forming machine |
| CN104439005A (en) * | 2014-10-27 | 2015-03-25 | 燕山大学 | Power recovery matching type pump-controlled hydraulic control system of oil press |
| CN105665475A (en) * | 2016-04-25 | 2016-06-15 | 太原科技大学 | Thick plate pressing machine hydraulic system |
| CN106903284A (en) * | 2017-03-17 | 2017-06-30 | 重庆江东机械有限责任公司 | Response charging device and its control method high of large-scale high speed hydraulic press |
| CN114483712A (en) * | 2022-02-04 | 2022-05-13 | 浙江大学 | Hydraulic cylinder micro-internal leakage detection test bed and detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202088514U (en) | Hydraulic circuit of large-size hydraulic machine comprising novel supercharger | |
| CN201769389U (en) | Hydraulic press | |
| CN201580012U (en) | Hydraulic control system for hydraulic press | |
| CN109139583B (en) | Hydraulic control system for forklift | |
| CN108383039B (en) | A kind of energy-saving stepping type lifter structure hydraulic control system | |
| CN105058554A (en) | Oil cylinder assembly and full-automatic two-way pressurizing hydraulic brick press with same | |
| CN103161190A (en) | Hybrid power full hydraulic loading machine hydraulic system based on pressure common rail system | |
| CN201304418Y (en) | A reversal stepping cold bed hydraulic synchronization control device | |
| CN102562686A (en) | Hydraulic system for double-acting supercharger | |
| CN201747684U (en) | Rapidly hydraulic driving system | |
| CN105206167A (en) | Multifunctional comprehensive experimental platform device | |
| CN101564893B (en) | Hydraulic drive unit for high-speed continuous hollow blow molding machine | |
| CN204985169U (en) | Energy -conserving comprehensive experimental platform device of hydraulic pressure | |
| CN201446692U (en) | Hydraulic driving device in high-speed continuous hollow blow-molding machine | |
| CN203308812U (en) | Pump station control hydraulic system | |
| CN109797798A (en) | A kind of excavator swing arm potential energy recycle and reuse system | |
| CN201390647Y (en) | Constant pressure oiling device of oiling nozzle | |
| CN201807953U (en) | Hydraulic transmission system of small plane grinding machine working platform | |
| CN204082721U (en) | A kind of fluid pressure drive device of lifting machine | |
| CN202764155U (en) | Servo valve control injection oil path system of large injection molding machine | |
| CN2215516Y (en) | Free falling impact type hydraulic hammer | |
| CN2747388Y (en) | Gas-liquid converting driving device | |
| CN202833391U (en) | Top drive type drilling machine power head linear motion hydraulic control system | |
| CN203949839U (en) | A kind of flow graph | |
| CN201361927Y (en) | Pressure adjusting and speed adjusting circuit for pressure-flow composite proportion in concrete block machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20120413 |