CN202571118U - Three-cylinder anisobaric large forging oil press - Google Patents
Three-cylinder anisobaric large forging oil press Download PDFInfo
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- CN202571118U CN202571118U CN 201220153699 CN201220153699U CN202571118U CN 202571118 U CN202571118 U CN 202571118U CN 201220153699 CN201220153699 CN 201220153699 CN 201220153699 U CN201220153699 U CN 201220153699U CN 202571118 U CN202571118 U CN 202571118U
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Abstract
The utility model discloses a three-cylinder anisobaric large forging oil press. A slide block is driven by three cylinders; the lower cavities of the three cylinders are connected through an oil pipe; the left and right cylinders in the upper cavities of the three cylinders are connected through the oil pipe; and the middle cylinder is independently connected. When the slide block of the oil press moves upwards, the three cylinders obtain hydraulic oil with the same pressure and flow from a hydraulic system, and when the slide block moves downwards, the upper cavities of the cylinders on the two sides and the middle cylinder are connected in the system under the control of a plurality of valves; during operation, when a mold on the slide block is in contact with a workpiece, due to the counter-force function in the pressing process, the system pressure is changed from a low pressure to a high pressure, the slide block has high speed under the low pressure, high-pressure oil is input into the middle cylinder, and low-pressure oil is input into the cylinders on the two sides; when the pressure reaches an intermediate value, the high-pressure oil is input into the cylinders on the two sides, and the low-pressure oil is input into the middle cylinder; and when the pressure reaches the highest value, the high-pressure oil is simultaneously input into the cylinders on the two sides and the middle cylinder. By the three-cylinder anisobaric large forging oil press, the system reliably operates, the forging speed is high, and the electricity can be saved by 60 percent.
Description
Technical field
The present invention relates to the forging equipment of mechanical manufacturing field, relate to a kind of large-sized forging hydraulic press in particular.
Background technology
The large-sized forging hydraulic press is modern equipment manufacture common equipment; Be mainly used in the forging of large-scale hardware; It is the key equipment of big machinery manufacturing, big aircraft, steamer manufacturing; In national defense industry, also played important function, so large-sized forging hydraulic press technical equipment even representing the national power of a country.The large-sized forging hydraulic press technical merit and the ability of current China have been in international most advanced level; But because hold on the historical edge short and industry technology of hydraulic press technology; Very right painstaking efforts and the application of computer technology in fields such as design and processing and control technologys through international and domestic colleague makes and should technology obtain developing rapidly in recent years, but the large-sized forging hydraulic press also exists a lot of technological deficiencies not solve.Basically to hydraulic system pumping plant now still adopt plunger displacement pump group, three cylinders or multi-cylinder hydraulic press oil cylinder epicoele be link to each other, a large amount of hydraulic oil supplies of slide block down (null) needs so conventional art be fuel feeding valve is installed at oil cylinder epicoele tubing interface place, is adopted the fuel feeding valve repairing; The continuity that this technological defective is hydraulic press work is bad, can not make full use of inertia force and realize the transformation speed changing function.Determine that thus the installed capacity of large-sized forging hydraulic press is huge.Large-sized forging hydraulic press agent structure mainly contains four-column type and planer type structure at present, and this structure technology is quite ripe, and current advanced technology is three piston cylinders or multi piston-cylinder structure, and the plunger case structure in past was replaced by piston cylinder in recent years basically.
Mainly there is following tripartite planar defect in the large-sized forging hydraulic press of prior art:
1, the machine power consumption is big, operation is discontinuous.
2, high, the reduction equipment manufacturing cost of equipment manufacturing cost.
Problem such as 3, occupation area of equipment is bigger.
Summary of the invention
The present invention is directed to the problems referred to above, provide a kind of low cost of manufacture, operation energy consumption low, easy to manufacture, save the forging equipment of resource.
In order to achieve the above object, the present invention provides a kind of three cylinder anisobaric large-sized forging hydraulic presses, comprises three hydraulic jacks in centre and both sides that drive the forge oil press slide, and three said oil cylinders are connected hydraulic oil container through oil pump with pipeline.Wherein, said oil pump comprises plunger displacement pump and centrifugal high pressure oil pump of three parallel connections; The plunger displacement pump of said parallel connection is connected to a main oil feed line.
Said main oil feed line is divided into three branch roads; Be respectively: the epicoele hydraulic fluid port of oil cylinder in the middle of first branch road is connected to through middle cylinder epicoele high pressure inlet valve; Second branch road is connected to the epicoele hydraulic fluid port of two side cylinders through both sides cylinder epicoele high pressure inlet valve, and the 3rd branch road is connected to the cavity of resorption hydraulic fluid port of three oil cylinders through cavity of resorption high pressure inlet valve, oil cylinder cavity of resorption oil pipe.
The 4th branch road and the 5th branch road are told in said centrifugal high pressure oil pump outlet, and wherein, said the 4th branch road is connected on the pipeline of said oil cylinder cavity of resorption oil pipe through the first plug-in check valve, cavity of resorption inlet valve successively; Said the 5th branch road is connected to the second plug-in check valve, and the oil-out of the said second plug-in check valve is communicated to respectively on the oil circuit between middle cylinder epicoele low pressure inlet valve, both sides cylinder epicoele low pressure inlet valve and said first plug-in check valve 7 and the said cavity of resorption inlet valve; The oil-out of said middle cylinder epicoele low pressure inlet valve is communicated to the epicoele hydraulic fluid port of said middle cylinder, and said both sides cylinder epicoele low pressure inlet valve is communicated to the epicoele hydraulic fluid port of said two side cylinders.The epicoele hydraulic fluid port of hydraulic fluid port has also connected middle cylinder epicoele draining valve through middle cylinder epicoele oil exit pipe in the middle of said; The epicoele hydraulic fluid port of said two side cylinders has connected a both sides cylinder epicoele draining valve through a both sides cylinder epicoele oil exit pipe; The cavity of resorption hydraulic fluid port pipeline of said three oil cylinders communicates and is connected to a cavity of resorption draining valve.
In order to guarantee the oil circuit operate as normal, be disposed with electromagnetic relief valve and check valve respectively on the oil-out pipeline of three plunger displacement pumps.
The cavity of resorption hydraulic fluid port of said three oil cylinders also is connected to a plug-in overflow valve parallelly connected with said cavity of resorption draining valve jointly.
The present invention is that agent structure is the large-sized forging hydraulic press new technology of inventing under the prerequisite situation with three piston cylinders or multi piston-cylinder large-sized forging hydraulic press.Difference is not to be communicated with, to have removed between each oil cylinder epicoele of hydraulic system fuel feeding valve, pumping plant and has adopted the centrifugal high pressure oil pump, removed reversal valve and directly adopt the 2/2-way inserted valve, can be directly by computer according to time, pressure and slide position and the workpiece technological parameter gauge tap realization work that will make.The multi-cylinder anisobaric large-sized forging hydraulic press, three cylinders (multi-cylinder) the anisobaric forge oil press design that the present invention relates to beyond the three cylinder anisobaric large-sized forging hydraulic presses are theoretical, and the theory and technology that on the large-sized hydraulic press hydraulic system, uses of high pressure centrifugal pump.
With a 50MN (5000 tons of forging abilities) forge oil press is example, traditional 50MN (5000 tons of forging abilities) forge oil press major parameter (seeing the traditional 50MN forge oil of table 1 press relevant parameter table):
Adopt the major parameter (seeing table 2 50MN forge oil of the present invention press parameter list) of 50MN of the present invention (5000 tons of forging abilities) forge oil press:
The traditional 50MN forge oil of table 1 press relevant parameter table
Table 2 50MN forge oil of the present invention press relevant parameter table
From the contrast of traditional 50MN forge oil press relevant parameter table and 50MN forge oil press relevant parameter table two table of the present invention, be not difficult to find out: the first, master slider descends different with the rate of climb under two basic identical situation of machine function; 50MN forge oil press master slider rising or falling speed of the present invention infinitely variable speeds; Speed automatic stepless descending, the slide block when mold on being installed in slide block soon touches workpiece slows down; Can keep a rational initial velocity spun work again to be unlikely to making mold and workpiece produce strong bump, inertia force is rationally utilized and has been saved the time; The speed of service up, slide block when slide block is up is earlier even to be quickened and the even motion process that slows down in back, the maximal rate of slide block is relevant with stroke, during big stroke its maximal rate greater than per second 500mm.This is because forge oil hydraulic system of press of the present invention has adopted big-flow high-pressure centrifugal oil pump and oil cylinder upper and lower cavity to design independent oil extraction pipeline and independent draining valve; The excursion of the pressure of centrifugal high pressure oil pump and flow is very big during operation; This performance is highly beneficial for the infinitely variable speeds of hydraulic press; And the efficient of centrifugal high pressure oil pump can reach 64 percent, when system pressure has surpassed centrifugal oil pump discharge opening pressure; Centrifugal high pressure oil pump automatic fuel cutoff, oil pump is near idling conditions, and the energy that this moment, the centrifugal high pressure oil pump consumed is minimum.When slide block down, the speed of service of slide block is the freely falling body process when beginning basically, the speed of service of slide block is even moderating process when the mold on the slide block soon touches workpiece; This also is because the present invention's three cylinder anisobaric forge oil hydraulic system of press have adopted big-flow high-pressure centrifugal oil pump and oil cylinder upper and lower cavity to design independent oil extraction pipeline and independent draining valve; And centrifugal high pressure oil pump intermediate pressure section has designed centre tap; Because centrifugal high pressure oil pump delivery flow is very big during slide block down; Because the viscosity influence of hydraulic oil makes the current of electric of centrifugal high pressure oil pump surpass the electric current when slide block is up, the increase of centrifugal high pressure oil pump flow has guaranteed that simultaneously current of electric is minimum under whole working condition when adopting centre tap.Research and practice show that three cylinder anisobaric large-sized forging hydraulic presses of this invention can also be practiced thrift a large amount of investments in fixed assets except can saving a large amount of electric energy and performance is superior to traditional large-sized forging hydraulic press.Wanting to be developed into the advanced large-sized forging hydraulic press of 26S Proteasome Structure and Function just must be designed to hydraulic press three cylinders or multi-cylinder anisobaric structure and adopt the centrifugal high pressure oil pump as the hydraulic press main oil pump.
Large-sized forging hydraulic press of the present invention; Comprise the ram cylinder that is installed on the hydraulic press main body, slide block is driven by three mill type cylinders, and the cavity of resorption of three oil cylinders is linked to each other by oil pipe; The epicoele of three oil cylinders wherein left and right sides oil cylinder is linked to each other by oil pipe, and middle oil cylinder is independently taken over.When the hydraulic press slide block was up, three oil cylinders obtained the identical pressure and the hydraulic oil of flow from hydraulic system, during slide block down two side cylinders under a plurality of valves are controlled in system with middle oil cylinder its epicoele also link to each other; After the mould on the slide block touched workpiece, because the counter-force effect of workpiece in pressing process, system pressure was changing from low to high during work, and the speed of slide block is fast during low pressure, middle oil cylinder input hydraulic oil, two side cylinders input low pressure oil; When pressure reaches median, two side cylinders input hydraulic oil, middle oil cylinder input low pressure oil; Both sides cylinder and middle cylinder are imported hydraulic oil simultaneously when pressure reaches peak; For the pressing speed that installed power is minimum and acquisition is maximum of hydraulic system, hydraulic system pump group of the present invention has adopted high-low pressure parallel-connected pumps group, and low-lift pump has adopted the high-pressure multi-stage centrifugal oil pump; This system of experiment proof is reliable, and forging speed is fast, can economize on electricity 60 percent.The present invention's three its superior performances of cylinder anisobaric large-sized forging hydraulic press invest 30% in can practicing thrift, and power consumption falls on a year-on-year basis more than 50～60%, easy to manufacture, saving resource.
Description of drawings
Fig. 1 is the hydraulic scheme of large-sized forging hydraulic press of the present invention;
Fig. 2 is the oil circuit figure of slide block down in the large-sized forging hydraulic press of the present invention;
Fig. 3 is the oil circuit figure of first class pressure in the large-sized forging hydraulic press of the present invention;
Fig. 4 is the oil circuit figure of secondary pressure in the large-sized forging hydraulic press of the present invention;
Fig. 5 is the oil circuit figure of three stage pressures in the large-sized forging hydraulic press of the present invention;
Fig. 6 is the oil circuit figure that slide block rises in the large-sized forging hydraulic press of the present invention.
Among the figure; Centrifugal high pressure oil pump 1, fuel tank 2, plunger displacement pump 3, electromagnetic relief valve 4, check valve 5, hydraulic oil house steward 6, plug-in check valve 7, centrifugal high pressure oil pump centre tap 8, plug-in check valve 9, low-voltage tube 10, centrifugal high pressure oil pump pipe 11 etc. have been formed the hydraulic system pumping plant and by plug-in overflow valve 12, cavity of resorption draining valve 13, cavity of resorption inlet valve 14, cavity of resorption high pressure oil inlet pipe 15, cavity of resorption high pressure inlet valve 16, both sides cylinder epicoele high pressure inlet valve 17, middle cylinder epicoele high pressure inlet valve 18, middle cylinder epicoele low pressure inlet valve 19, both sides cylinder epicoele low pressure inlet valve 20, both sides cylinder epicoele draining valve 21, middle cylinder epicoele draining valve 22, middle cylinder epicoele oil exit pipe 23, both sides cylinder epicoele oil exit pipe 24, both sides cylinder epicoele low pressure oil inlet pipe 25, middle cylinder epicoele low pressure oil inlet pipe 26, both sides cylinder epicoele oil inlet pipe 27, oil cylinder cavity of resorption oil pipe 28, right oil cylinder 29, cavity of resorption tube connector 30, middle oil cylinder 31, left oil cylinder 32, cavity of resorption oil exit pipe 33.
The specific embodiment
Fig. 1 is the present invention's three cylinder anisobaric large-sized forging hydraulic press hydraulic system principle assumption diagrams; Constitute 33 of the main parts size of this system, the operation of the hydraulic system of being made up of these parts and auxiliary piping, control piper, integrated oil path etc. drives the compaction procedure of up, the descending and workpiece of hydraulic press body runner.
Specifically; As shown in Figure 1; Three cylinder anisobaric large-sized forging hydraulic presses; The integrated oil path of having formed the hydraulic system pumping plant and having formed by centrifugal high pressure oil pump 1, fuel tank 2, plunger displacement pump 3 (many pump groups), electromagnetic relief valve 4 (every plunger displacement pump is joined), check valve 5 (every plunger displacement pump is joined), hydraulic oil house steward 6, plug-in check valve 7, centrifugal high pressure oil pump centre tap 8, plug-in check valve 9, low-voltage tube 10, centrifugal high pressure oil pump pipe 11 etc. by plug-in overflow valve 12, cavity of resorption draining valve 13, cavity of resorption inlet valve 14, cavity of resorption high pressure oil inlet pipe 15, cavity of resorption high pressure inlet valve 16, both sides cylinder epicoele high pressure inlet valve 17, middle cylinder epicoele high pressure inlet valve 18, middle cylinder epicoele low pressure inlet valve 19, both sides cylinder epicoele low pressure inlet valve 20, both sides cylinder epicoele draining valve 21, middle cylinder epicoele draining valve 22, middle cylinder epicoele oil exit pipe 23, both sides cylinder epicoele oil exit pipe 24, both sides cylinder epicoele low pressure oil inlet pipe 25, middle cylinder epicoele low pressure oil inlet pipe 26, both sides cylinder epicoele oil inlet pipe 27, oil cylinder cavity of resorption oil pipe 28, right oil cylinder 29, cavity of resorption tube connector 30, middle oil cylinder etc.; In addition, also comprise parts such as hydraulic press body.
Among Fig. 1, pumping plant is connected by hydraulic oil house steward 6, low-voltage tube 10, centrifugal high pressure oil pump outlet line 11 with the integrated oil path part; Be connected by middle cylinder epicoele oil exit pipe 23, both sides cylinder epicoele oil exit pipe 24, both sides cylinder epicoele low pressure oil inlet pipe 25, middle cylinder epicoele low pressure oil inlet pipe 26, both sides cylinder epicoele oil inlet pipe 27, oil cylinder cavity of resorption oil pipe 28, cavity of resorption oil exit pipe 33 between the oil cylinder on integrated oil path and the hydraulic press main body.For convenience of description, omit like hydraulic oil filtration system, heating and cooling system pressure and system for detecting temperature etc. among the figure, the control oil circuit be not elaborated, main body and electric-control system be not elaborated.
The hydraulic system pumping plant is made up of centrifugal high pressure oil pump 1, fuel tank 2, plunger displacement pump 3 (many pump groups), electromagnetic relief valve 4 (every plunger displacement pump is joined), check valve 5 (every plunger displacement pump is joined), hydraulic oil house steward 6, plug-in check valve 7, centrifugal high pressure oil pump centre tap 8, plug-in check valve 9, low-voltage tube 10, centrifugal high pressure oil pump pipe 11 etc.Design centrifugal high pressure oil pump centre tap 8, plug-in check valve 9 in the high pressure centrifugal pump stage casing.
Among Fig. 1,31 3 oil cylinder cavity of resorptions of oil cylinders oil pipe is communicated with in the middle of left oil cylinder 32, the right oil cylinder 29; Plug-in overflow valve 12, cavity of resorption draining valve 13, cavity of resorption inlet valve 14, cavity of resorption high pressure oil inlet pipe 15, cavity of resorption high pressure inlet valve 16 link to each other; Left side oil cylinder 32,29 two oil cylinder epicoeles of right oil cylinder oil pipe is connected and be connected with both sides cylinder epicoele oil exit pipe 24, both sides cylinder epicoele low pressure oil inlet pipe 25 both sides cylinder epicoele high pressure inlet valves 17, both sides cylinder epicoele low pressure inlet valve 20, both sides cylinder epicoele draining valve 21; Middle cylinder 31 epicoeles are not connected with left and right sides cylinder epicoele.Middle cylinder epicoele oil exit pipe 23, middle cylinder epicoele low pressure oil inlet pipe 26, middle cylinder epicoele high pressure inlet valve 18, middle cylinder epicoele low pressure inlet valve 19 are connected with middle cylinder 31 epicoeles.
The course of work of the present invention's three cylinder anisobaric large-sized forging hydraulic presses can be with reference to five kinds of duty explanations shown in Fig. 2-6.Among Fig. 2-6, show the valve, the pipeline that play useful effect under the duty respectively; And not shown other valves, pipeline are in disarmed state respectively under the duty of each figure expression, that is to say that valve is in closed condition, and pipeline is in the state of the hydraulic oil that do not circulate etc.The course of work below in conjunction with accompanying drawing 1-6 explanation hydraulic press of the present invention.
The plunger displacement pump group provides hydraulic oil to system, in the workpiece pressing process, makes workpiece obtain maximum press power; Centrifugal high pressure oil pump 1 provides big flow pressure lower hydraulic oil to system, and high pressure centrifugal pump 1 adds that pressure and the flow of the hydraulic oil that big flow pressure that the plunger displacement pump group provides to system is lower can be to promote the up drive hydraulic press of oil cylinder slide block move up fast (its maximal rate can reach 500mm/s); System is in the minute-pressure state during slide block down; A large amount of hydraulic oil gets into system through centrifugal high pressure oil pump centre tap pipe 11; The big or small mold of controlling slide block of aperture through adjustment cavity of resorption draining valve 13 when the mold on the slide block soon touches workpiece touches workpiece with suitable initial velocity; After mold touches workpiece; The plug-in check valve 9 that the oil cylinder upper cavity pressure improves rapidly, is installed on the centrifugal high pressure oil pump intervalve is closed; The hydraulic oil that centrifugal high pressure oil pump 1 pumps is all through centrifugal high pressure oil pump outlet line 11 entering systems, and when system pressure rose to centrifugal high pressure oil pump rated pressure, two side cylinder epicoele high pressure inlet valves 17 cut out; Cylinder epicoele low pressure inlet valve 20 continues to two side cylinder fuel feeding the alleged first class pressure of the present invention that Here it is (seeing Fig. 3 for details) to the hydraulic oil of the plunger displacement pump group low pressure oil that oil cylinder 31, high pressure centrifugal pump 1 pump in the middle of middle oil cylinder epicoele high pressure inlet valve 18 all gets into through both sides; Fig. 3 is first class pressure oil circuit figure, and the direction among the figure shown in the arrow is the flow direction of oil in the system, and all valves are in opening state, and the valve and the pipeline of closing are omitted; Make a concerted effort (the two low height that adds) of the high pressure that the first class pressure pressure that to be the both sides cylinder produced by the centrifugal high pressure oil pump is produced by the plunger displacement pump group with middle cylinder.
After pressure continue to raise, middle cylinder epicoele high pressure inlet valve 18 cuts out; Both sides cylinder epicoele high pressure inlet valve 17 is opened; Cylinder epicoele high pressure inlet valve 17 gets into two side cylinders through both sides from the high pressure oil of plunger displacement pump group; Low pressure oil from the centrifugal high pressure oil pump gets into middle cylinder, the secondary pressure (seeing Fig. 4 for details) that the present invention that Here it is is alleged through middle cylinder epicoele low pressure inlet valve 19; The making a concerted effort of the low-pressure that the secondary pressure high pressure that to be the both sides cylinder produced by the plunger displacement pump group is produced by high pressure centrifugal pump with middle cylinder (two-supremes add one low).
After pressure continues to raise again, middle cylinder epicoele high pressure inlet valve 18 opens; Both sides cylinder epicoele high pressure inlet valve 17 continues to open; Cylinder epicoele high pressure inlet valve 17,18 gets into three oil cylinder epicoeles through both sides from the high pressure oil of plunger displacement pump group; From the low pressure oil of centrifugal high pressure oil pump by closed check valve, three stage pressures (seeing Fig. 5 for details) that the present invention that Here it is is alleged; Three stage pressures get into three cylinders (two-supremes adds a height) simultaneously for the high pressure that the plunger displacement pump group produces.
When slide block accomplish press the program that computer sets after an i.e. suppression mission completion; Slide block upwards rise rapidly under computer instruction, both sides cylinder epicoele draining valve 21, middle cylinder epicoele draining valve 22 are opened; Epicoele hydraulic oil gets into fuel tank through the epicoele draining valve, and cavity of resorption high pressure inlet valve 16,14 unlatchings of cavity of resorption inlet valve, cavity of resorption draining valve 13 are closed simultaneously.Hydraulic oil from pumping plant gets into the oil cylinder cavity of resorption through cavity of resorption high pressure inlet valve 16, cavity of resorption inlet valve 14; Epicoele both sides cylinder draining valve 21, middle cylinder epicoele draining valve 22 are closed before the near desired location of slide block; Cavity of resorption high pressure inlet valve 16, cavity of resorption inlet valve 14 are closed; Up end sees Fig. 6 (the up oil circuit figure of slide block) for details.
Slide block down, entering continuous duty for the second time see Fig. 2 (slide block down oil circuit figure) for details; Here repeat no more about descending; Must explanation on hydraulic system cavity of resorption oil circuit of the present invention, design plug-in overflow valve 12 in addition; This valve is a system protection valve, and this valve is in closed condition all the time under the normal condition, has only the safety of when the cavity of resorption draining valve is malfunctioning, opening with protection system.This invention a plurality of positions in system are designed with pressure sensor in addition, and these sensors are connected the safety that at any time system is detected and controls with the assurance system with computer.
The above; Be merely the preferable specific embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any technical staff who is familiar with the present technique field is equal to replacement or change according to technical scheme of the present invention and inventive concept thereof in the technical scope that the present invention discloses, all should be encompassed within protection scope of the present invention.
Claims (3)
1. a cylinder anisobaric large-sized forging hydraulic press comprises three hydraulic jacks in centre and both sides that drive the forge oil press slide, and three said oil cylinders are connected hydraulic oil container (2) through oil pump with pipeline; It is characterized in that,
Said oil pump comprises the plunger displacement pump (3) and a centrifugal high pressure oil pump (1) of three parallel connections; The plunger displacement pump of said parallel connection (3) is connected to a main oil feed line; Said main oil feed line is divided into three branch roads; Be respectively: the epicoele hydraulic fluid port of oil cylinder in the middle of first branch road is connected to through middle cylinder epicoele high pressure inlet valve (18); Second branch road is connected to the epicoele hydraulic fluid port of two side cylinders through both sides cylinder epicoele high pressure inlet valves (17), and the 3rd branch road is connected to the cavity of resorption hydraulic fluid port of three oil cylinders through cavity of resorption high pressure inlet valve (16), oil cylinder cavity of resorption oil pipe (28);
The 4th branch road and the 5th branch road are told in said centrifugal high pressure oil pump (1) outlet, and wherein, said the 4th branch road is connected on the pipeline of said oil cylinder cavity of resorption oil pipe (28) through the first plug-in check valve (7), cavity of resorption inlet valve (14) successively; Said the 5th branch road is connected to the second plug-in check valve (9), and the oil-out of the said second plug-in check valve (9) is communicated to respectively on the oil circuit between middle cylinder epicoele low pressure inlet valve (19), both sides cylinder epicoele low pressure inlet valves (20) and said first plug-in check valve (7) and the said cavity of resorption inlet valve (14); The oil-out of said middle cylinder epicoele low pressure inlet valve (19) is communicated to the epicoele hydraulic fluid port of said middle cylinder, and said both sides cylinder epicoele low pressure inlet valves (20) are communicated to the epicoele hydraulic fluid port of said two side cylinders;
The epicoele hydraulic fluid port of hydraulic fluid port has also connected middle cylinder epicoele draining valve (22) through middle cylinder epicoele oil exit pipe (23) in the middle of said;
The epicoele hydraulic fluid port of said two side cylinders has connected both sides cylinder epicoele draining valves (21) through both sides cylinder epicoele oil exit pipes (24);
The cavity of resorption hydraulic fluid port pipeline of said three oil cylinders communicates and is connected to a cavity of resorption draining valve (13).
2. according to the said three cylinder anisobaric large-sized forging hydraulic presses of claim 1, it is characterized in that, be disposed with electromagnetic relief valve (4) and check valve (5) on the oil-out pipeline of said three plunger displacement pumps (3) respectively.
3. according to claim 1 or 2 said three cylinder anisobaric large-sized forging hydraulic presses, it is characterized in that the cavity of resorption hydraulic fluid port of said three oil cylinders also is connected to a plug-in overflow valve (12) parallelly connected with said cavity of resorption draining valve (13) jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220153699 CN202571118U (en) | 2012-04-12 | 2012-04-12 | Three-cylinder anisobaric large forging oil press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220153699 CN202571118U (en) | 2012-04-12 | 2012-04-12 | Three-cylinder anisobaric large forging oil press |
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| Publication Number | Publication Date |
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| CN202571118U true CN202571118U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220153699 Withdrawn - After Issue CN202571118U (en) | 2012-04-12 | 2012-04-12 | Three-cylinder anisobaric large forging oil press |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008520A (en) * | 2013-01-21 | 2013-04-03 | 天津市天重江天重工有限公司 | Pressure control device of large free forging hydraulic press |
| CN103372625A (en) * | 2012-04-12 | 2013-10-30 | 大连春洋重工机械制造有限公司 | Anisobaric-three-cylinder large forging oil press |
| CN108533560A (en) * | 2018-03-30 | 2018-09-14 | 天津市天锻压力机有限公司 | A kind of composite cylinder suitable for multi-cored forging press |
-
2012
- 2012-04-12 CN CN 201220153699 patent/CN202571118U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372625A (en) * | 2012-04-12 | 2013-10-30 | 大连春洋重工机械制造有限公司 | Anisobaric-three-cylinder large forging oil press |
| CN103372625B (en) * | 2012-04-12 | 2015-03-11 | 大连春洋重工机械制造有限公司 | Anisobaric-three-cylinder large forging oil press |
| CN103008520A (en) * | 2013-01-21 | 2013-04-03 | 天津市天重江天重工有限公司 | Pressure control device of large free forging hydraulic press |
| CN108533560A (en) * | 2018-03-30 | 2018-09-14 | 天津市天锻压力机有限公司 | A kind of composite cylinder suitable for multi-cored forging press |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20121205 Effective date of abandoning: 20150311 |
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| RGAV | Abandon patent right to avoid regrant |