CN102371325B - A kind of oil pump accumulator dynamic transfer system of large and medium-sized forge oil press - Google Patents
A kind of oil pump accumulator dynamic transfer system of large and medium-sized forge oil press Download PDFInfo
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- CN102371325B CN102371325B CN201110356138.1A CN201110356138A CN102371325B CN 102371325 B CN102371325 B CN 102371325B CN 201110356138 A CN201110356138 A CN 201110356138A CN 102371325 B CN102371325 B CN 102371325B
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Abstract
A kind of " oil pump accumulator dynamic transfer system " of large and medium-sized forge oil press, comprise forge oil press, forge oil press is connected with high-pressure oil pump and hydraulic oil accumulator simultaneously, is reached through the object that high-pressure oil pump and hydraulic oil accumulator drive jointly; Or forge oil press is connected with high-pressure oil pump and hydraulic oil accumulator by two-bit triplet electricity liquid switching valve simultaneously, composition " dual dynamic transmission system ", i.e. " oil pump accumulator dynamic transfer system " and " oil pump direct driving force transmission system " deposit and can switch at any time, reach and both jointly drove by high-pressure oil pump and hydraulic oil accumulator, the object that high-pressure oil pump directly drives separately can be realized again.The present invention has the plurality of advantages such as first construction investment is low, installed capacity is little, energy resource consumption is low, pumping plant floor space is little, operating cost is low.The present invention both can lead large and medium-sized forge oil press dynamic transfer system to adopt the design direction of " oil pump accumulator dynamic transfer system ", the forge oil press of the numerous employings run now " oil pump direct driving force transmission system " is can be used for again to transform as " oil pump accumulator dynamic transfer system ", to obtain many-sided economic benefit.
Description
Technical field
The invention belongs to metal forming machinery technical field, be specifically related to a kind of oil pump accumulator dynamic transfer system of large and medium-sized forge oil press.
Background technology
Last century four, the fifties, the large and medium-sized hydraulic forging press overwhelming majority adopts " water pump accumulator dynamic transfer system ", therefore claims hydraulic forging press, and continuity uses so far.The dynamic transfer system of large and medium-sized hydraulic forging press can only be " water pump accumulator dynamic transfer system ", and such hydraulic forging press is mainly made up of three parts such as hydraulic press, high-pressure hydraulic pump, water under high pressure accumulators.Because high-pressure hydraulic pump needs decelerator to realize main shaft low (200r/min is upper and lower), weight, volume, floor space are all very large.If only use high-pressure hydraulic pump (without water under high pressure accumulator) to carry out the power transmission of hydraulic forging press, then for realizing identical press pressure operating rate, the high-pressure hydraulic pump floor space of required enough number of units is too large.In the 60 to 70's of last century, China had once succeeded in developing (decelerator-free) light high pressure water pump at a high speed, and efficiency is high, volume is little, floor space is little, made only to achieve the transmission of water pump direct driving force at the small-sized hydraulic forging press that 10MN is upper and lower.But due to reasons such as this pump maintenance capacity are large, limit it and promote, therefore just abandon the effort adopting " water pump direct driving force transmission system " in large and medium-sized hydraulic forging press." the water pump accumulator dynamic transfer system " of hydraulic forging press is widely used so far, and its major defect existed is as follows: construction investment is large first; Pumping plant floor space is larger; Installed capacity is larger; Because the gross efficiency of high-pressure hydraulic pump is low, the free-runing operation time is long, therefore it is many to waste energy; Automatic control forging ' s block dimension precision and the difficulty linked with forging manipulator larger; But transmission medium price is low, do not worry that the problems such as transmission medium burning are its advantages.
Since the second half in 20th century, along with the develop rapidly of hydraulic technology and element thereof, hydraulic forging press adopts " oil pump direct driving force transmission system " without hydraulic oil accumulator to get more and more, but due to multiple objective condition restriction in the past, various countries are showed no and adopt " oil pump accumulator dynamic transfer system " when depressing impulse stroke.The shortcoming of single " oil pump direct driving force transmission system " and the technical problem of existence as follows: each pressure impulse stroke and backhaul all need be built and be pressed through journey from supercharging pressure (0.4 ~ 0.8MPa), the pressure boosting to needs (is up to 31.5MPa or higher, determined by resistance), extend each circulation timei, waste electric energy, it accelerates the temperature rise of system after converting heat energy to; Pressure speed of working stroke is comparatively slow, and it depends on the total flow of high-pressure oil pump, generally can only reach 80mm/s upper and lower, want to improve the quantity that this speed must increase high-pressure oil pump; The high-pressure oil pump number of units of large discharge is many, high capacity motor no-load running, consumes electric energy large, wastes energy; Installed capacity is too large; Pumping plant floor space is large; The oil cylinder of travelling table also needs other low discharge direct driving force transmission system, not only add control difficulty, larger problem be press move beam pressure unbalance loading time produce side force, travelling table is shifted, increases difficulty to the operation of the operations such as cutting (chopping material), offsetting and torsion; Numerous high-pressure oil pump maintenance amount is large; Operating cost is high; Need practicable fire prevention measure during power failure, make provision against emergencies, but difficulty is very large.
In recent years along with the increase of pressure pan kind, technical maturity and price reduce; The reliability of high pressure oil level detection, display and automatic control technology is resolved (can accomplish that oily magnet steel floating drum never sinks in oil); The source nitrogens such as mini-series nitrogen making machine and liquid nitrogen are easily selected or obtain; Fill the technical development of ripe easy grade four aspect of nitrogen supercharging technology, for the popularization of " oil pump accumulator dynamic transfer system " provides material premise condition.
Summary of the invention
For overcoming above-mentioned existing nine aspect technical disadvantages and existing technical problem, the object of the present invention is to provide a kind of " oil pump accumulator dynamic transfer system " of forge oil press, it has the advantages such as construction investment is first low, installed capacity is little, pumping plant floor space is little, operating cost is low compared with " water pump accumulator dynamic transfer system "; The prior art defect of above-mentioned eight aspects and existing technical problem is then overcome compared with " oil pump direct driving force transmission system ".
In order to achieve the above object, the technical scheme that the present invention takes is:
A kind of " oil pump accumulator dynamic transfer system " of large and medium-sized forge oil press, comprise forge oil press (1), forge oil press (1) is connected with high-pressure oil pump (2) and hydraulic oil accumulator (3) simultaneously.
" the dual dynamic transmission system " of another kind of large and medium-sized forge oil press, comprise forge oil press (1), forge oil press (1) is connected with high-pressure oil pump (2) and hydraulic oil accumulator (3) by two-bit triplet electricity liquid switching valve (4) simultaneously, composition " dual dynamic transmission system ", i.e. " oil pump accumulator dynamic transfer system " and " oil pump direct driving force transmission system " deposit and can switch at any time.
The invention has the beneficial effects as follows:
The dynamic transfer system of hydraulic press adopts " dual dynamic transmission system ", integrates " oil pump accumulator dynamic transfer system " and " oil pump direct driving force transmission system " and the advantage of depositing:
1, installed capacity is little;
2, pumping plant floor space is little;
3, operating cost is low.
When being switched to " oil pump accumulator dynamic transfer system ":
4, depress impulse stroke and press through journey without building, pressure is decided by accumulator pressure, the circulation timei extended when avoiding each boosting and waste of energy;
5, depress operating rate fast, it depends on the resistance of forging, can reach more than 100mm/s;
6, high-pressure oil pump number of units is few, after press stops, first toward high-pressure oil-tank fuel feeding, until high-pressure oil-tank reach the highest oil level time, motor just no-load running, consumes electric energy few, economize energy;
7, the oil cylinder of travelling table does not need to set up low discharge direct driving force transmission system in addition, and when press moves beam pressure unbalance loading generation side force, travelling table is not shifted, and chops the operations such as material easy to operate;
8, high-pressure oil pump maintenance amount is few;
9, during grid power blackout, hot forging, as power, can be shifted out press, with fire-proof by hydraulic oil as early as possible that have because of high-pressure oil-tank;
When being switched to " oil pump direct driving force transmission system ":
10, the tonnage of press can bring up to the peak that hydraulic press body design allows, and concrete tonnage depends on the pressure set points of high-pressure oil pump;
11, depress operating rate constant, depend on the total flow dropping into high-pressure oil pump, be convenient to the automatic detection and control of forging ' s block dimension, reach forging ' s block dimension required precision.Meanwhile, create conditions for more accurate and forging manipulator link.
The present invention widely good effect is:
1, " oil pump accumulator dynamic transfer system " will lead the developing direction of large and medium-sized free-forging hydraulic dynamic transfer system, it was both better than " water pump accumulator dynamic transfer system ", overcome again the shortcoming of " oil pump direct driving force transmission system ", also can form " dual dynamic transmission system " if desired, effect is better.When the design of large and medium-sized free-forging hydraulic dynamic transfer system is selected and old press technique transforms, should pay the utmost attention to.
2, other process applications such as design of the dynamic transfer system of the large and medium-sized hydraulic presses such as die forging, extruding, punching press is selected, first majority also should be considered to adopt " oil pump accumulator dynamic transfer system " or " dual dynamic transmission system ", compare, substantially with the comparison in above-mentioned free-forging hydraulic with " oil pump direct driving force transmission system " and " water pump accumulator dynamic transfer system ".
3, numerous free forging oil press overwhelming majority employing just in use at present is " oil pump direct driving force transmission system ", therefore all there is shortcoming and the technical problem of aforementioned " oil pump direct driving force transmission system ".Only from economize energy, reduce operating cost, also should consider to increase hydraulic oil accumulator, system less only with 1 high-pressure oil-tank; Larger use 1 ~ 3 high-pressure oil-tank and multiple elevated pressure nitrogen gas tank.The feasibility and necessity they being transformed into " oil pump accumulator dynamic transfer system " or " dual dynamic transmission system " need be made a concrete analysis of according to hydraulic press concrete condition.
Accompanying drawing explanation
Fig. 1 is that forge oil press adopts " oil pump accumulator dynamic transfer system " schematic diagram.
Fig. 2 is that forge oil press adopts " dual dynamic transmission system " schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail:
With reference to Fig. 1, a kind of " oil pump accumulator dynamic transfer system " of large and medium-sized forge oil press, comprise forge oil press (1), forge oil press (1) is connected with high-pressure oil pump (2) and hydraulic oil accumulator (3) simultaneously.
Operation principle of the present invention is:
Forge oil press (1) adopts high-pressure oil pump (2) and hydraulic oil accumulator (3) jointly to drive, composition " oil pump accumulator dynamic transfer system ".
For three of 120MN free-forging hydraulic kinds of designs, two that carry out high-pressure pump and high pressure accumulator are compared, advantage of the present invention are described:
The equal 31.5MPa of system pressure, often forges number of times: 61/min, maximum functional stroke 275mm, maximum functional travel speed 100mm/s, backhaul 400mm, opening speed 250mm/s.
1,120MN hydraulic press for free forging adopts " water pump accumulator dynamic transfer system ":
The quantity of high-pressure hydraulic pump 8, every platform flow 1m
3/ min, power of motor 710KW, installed capacity 5680KVA, floor space 224m
2;
Water under high pressure accumulator needs 4m
3high-pressure water tank 4,4m
3high pressure gas holder 10, floor space 90m
2;
Two present price lattice about 9,800,000 yuan, two floor space 314m
2.
2,120MN free forging oil press adopts " oil pump direct driving force transmission system ":
The quantity of high-pressure oil pump 68, every platform flow 0.35m
3/ min, power of motor 200KW, installed capacity 13600KVA, present price lattice 4,080,000 yuan, floor space 660m
2;
3,120MN free forging oil press adopts " oil pump accumulator dynamic transfer system ":
The quantity of high-pressure oil pump 22, every platform flow 0.35m
3/ min, power of motor 200KW, installed capacity 4400KVA, floor space 213m
2;
Hydraulic oil accumulator needs 4m
3high-pressure oil-tank 4,4m
3high pressure gas holder 4, floor space 35m
2;
Two present price lattice 3,720,000 yuan, two floor space 248m
2.
In sum, under equivalent technology requires, carry out high-pressure pump and high pressure accumulator two are compared, and the price of the 3rd scheme and 120MN free forging oil press " oil pump accumulator dynamic transfer system " is minimum, floor space is minimum, installed capacity is minimum.With regard to three kinds of schemes hydraulic press in general, the cost performance of the program is the highest.
With reference to accompanying drawing 2, a kind of " dual dynamic transmission system " of large and medium-sized forge oil press, comprise forge oil press (1), forge oil press (1) is connected with high-pressure oil pump (2) and hydraulic oil accumulator (3) by two-bit triplet electricity liquid switching valve (4) simultaneously, composition " dual dynamic transmission system ", i.e. " oil pump accumulator dynamic transfer system " and " oil pump direct driving force transmission system " deposit and can switch at any time.
Operation principle of the present invention is:
Forge oil press (1) to be connected with high-pressure oil pump (2) and hydraulic oil accumulator (3) by two-bit triplet electricity liquid switching valve (4) simultaneously and jointly to drive, composition " oil pump accumulator dynamic transfer system ", and switch to " oil pump direct driving force transmission system " by two-bit triplet electricity liquid switching valve (4), driven separately by high-pressure oil pump (2).
With the dynamic transfer system of 60/80MN free forging oil press for successful examples, illustrate that the present invention is practicable.
The dynamic transfer system of 60/80MN free forging oil press have employed " dual dynamic transmission system ", i.e. " oil pump accumulator dynamic transfer system " and " oil pump direct driving force transmission system " deposit, two-bit triplet electricity liquid switching valve (4) can be controlled by press driver operation right handles arbitrarily change.
The parameter of " oil pump accumulator dynamic transfer system " is adopted when 60MN:
System pressure 28MPa, normal forging number of times 5 ~ 121/min, maximum functional stroke 80mm, maximum functional travel speed 100mm/s, backhaul 150mm, opening speed 250mm/s; Situ configuration: 4m
3high-pressure oil-tank 1, the quantity of high-pressure oil pump 11, every platform flow 0.35m
3/ min, power of motor 200KW, installed capacity 2200KVA.
The parameter of oil pump direct driving force transmission system is adopted when 80MN:
System pressure 35.8MPa, only for jumping-up operation, maximum functional travel speed is determined by the quantity of import high-pressure oil pump, and existing temporary two import high-pressure oil pumps, the later stage needs to increase import high-pressure oil pump again according to technique, finally determines maximum functional travel speed.
The overall floor space 540m of this pumping plant
2(24mX22.5m), on-the-spot only in this way little fixed-area, therefore also only has employing " oil pump accumulator dynamic transfer system " or " dual dynamic transmission system " just can hold.Fact proved that this press floor space is little, invest little, installed capacity is minimum, and operating cost is low, farthest meets the demand of user at the scene under multiple limited case.
Claims (2)
1. the oil pump accumulator dynamic transfer system of a large and medium-sized forge oil press, comprise forge oil press (1), it is characterized in that: forge oil press (1) is connected with high-pressure oil pump (2) and hydraulic oil accumulator (3) simultaneously;
Pressure impulse stroke presses through journey without building, and pressure is decided by accumulator pressure; Pressure operating rate is fast, and it depends on the resistance of forging, can reach more than 100mm/s.
2. the dual dynamic transmission system of a large and medium-sized forge oil press, it is characterized in that: comprise forge oil press (1), forge oil press (1) is connected with high-pressure oil pump (2) and hydraulic oil accumulator (3) by two-bit triplet electricity liquid switching valve (4) simultaneously, and wherein the switching of two-bit triplet electricity liquid switching valve (4) determines whether hydraulic oil accumulator (3) is connected with forge oil press (1) and high-pressure oil pump (2);
When switching to hydraulic oil accumulator (3) and not being connected with forge oil press (1) and high-pressure oil pump (2), it is oil pump direct driving force transmission system; The tonnage of press can bring up to the peak of hydraulic press body design permission, and concrete tonnage depends on the pressure set points of high-pressure oil pump; Pressure operating rate is constant, depends on the total flow dropping into high-pressure oil pump;
When switching to hydraulic oil accumulator (3) and being connected with forge oil press (1) and high-pressure oil pump (2), it is then oil pump accumulator dynamic transfer system, the two composition dual dynamic transmission system, i.e. oil pump accumulator dynamic transfer system and oil pump direct driving force transmission system deposit and can switch at any time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110356138.1A CN102371325B (en) | 2011-11-10 | 2011-11-10 | A kind of oil pump accumulator dynamic transfer system of large and medium-sized forge oil press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110356138.1A CN102371325B (en) | 2011-11-10 | 2011-11-10 | A kind of oil pump accumulator dynamic transfer system of large and medium-sized forge oil press |
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| Publication Number | Publication Date |
|---|---|
| CN102371325A CN102371325A (en) | 2012-03-14 |
| CN102371325B true CN102371325B (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110356138.1A Expired - Fee Related CN102371325B (en) | 2011-11-10 | 2011-11-10 | A kind of oil pump accumulator dynamic transfer system of large and medium-sized forge oil press |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927064A (en) * | 2012-11-08 | 2013-02-13 | 王佐栋 | Forging hydraulic press pump accumulator transmission system and pressure transformation method thereof |
| WO2018064564A1 (en) * | 2016-09-30 | 2018-04-05 | Apex Brands, Inc. | Portable hydraulic power tool |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4212185A (en) * | 1979-03-16 | 1980-07-15 | The Continental Group, Inc. | Hydraulic press system |
| CN101254519A (en) * | 2007-03-02 | 2008-09-03 | 张长龙 | Lower ram micromotion full-hydraulic counterblow hammer |
| CN201632573U (en) * | 2010-04-01 | 2010-11-17 | 德谦杭重锻造有限公司 | Free forging hydraulic power system |
| CN201880838U (en) * | 2010-12-06 | 2011-06-29 | 中国重型机械研究院有限公司 | Rapid return device of rapid forging oil press |
| CN201988666U (en) * | 2010-12-15 | 2011-09-28 | 上海重型机器厂有限公司 | Quick energy-saving return device of free forging oil press |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11197779A (en) * | 1998-01-14 | 1999-07-27 | Komatsu Ltd | Hydraulic pressure generating device for full enclosed die forging |
-
2011
- 2011-11-10 CN CN201110356138.1A patent/CN102371325B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4212185A (en) * | 1979-03-16 | 1980-07-15 | The Continental Group, Inc. | Hydraulic press system |
| CN101254519A (en) * | 2007-03-02 | 2008-09-03 | 张长龙 | Lower ram micromotion full-hydraulic counterblow hammer |
| CN201632573U (en) * | 2010-04-01 | 2010-11-17 | 德谦杭重锻造有限公司 | Free forging hydraulic power system |
| CN201880838U (en) * | 2010-12-06 | 2011-06-29 | 中国重型机械研究院有限公司 | Rapid return device of rapid forging oil press |
| CN201988666U (en) * | 2010-12-15 | 2011-09-28 | 上海重型机器厂有限公司 | Quick energy-saving return device of free forging oil press |
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| CN102371325A (en) | 2012-03-14 |
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