CN103291685A - Low-load high speed/heavy-load low speed cylinder - Google Patents
Low-load high speed/heavy-load low speed cylinder Download PDFInfo
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- CN103291685A CN103291685A CN2013101825647A CN201310182564A CN103291685A CN 103291685 A CN103291685 A CN 103291685A CN 2013101825647 A CN2013101825647 A CN 2013101825647A CN 201310182564 A CN201310182564 A CN 201310182564A CN 103291685 A CN103291685 A CN 103291685A
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Abstract
The invention relates to a low-load high speed/heavy-load low speed cylinder comprising a cylinder body, a piston, seal rings, a hollow first piston rod, a hollow second piston rod, and a control circuit for controlling telescoping of the cylinder. One end of the second piston rod is connected with the piston inside the cylinder body, and the other end of the second piston penetrates out of the cylinder body. One end of the first piston rod is connected with the cylinder body, and the other end of the first piston rod penetrates the second piston rod. One seal ring is arranged between the second piston rod and the piston, another seal ring is arranged between the second piston rod and the cylinder body, and the remaining seal ring is arranged between the first piston rod and the second piston rod. A piston cavity is formed between the cylinder body and the piston. A piston rod cavity is formed among the cylinder body, the second piston rod and the piston. A complex cavity is formed between the first piston rod and the second piston rod. One end of the first piston rod, connected with the cylinder body, is provided with a third oil hole, the cavity wall of the piston cavity is provided with a first oil hole, and the cavity wall of the piston rod cavity is provided with a second oil hole. The low-load high speed/heavy-load low speed cylinder has the advantages that while no additional input is added, operating cycle is shortened, production efficiency is improved and energy waste is reduced.
Description
Technical field
The present invention relates to a kind of little load high speed, heavy load low speed cylinder.
Background technique
The master cylinder stroke that relates to equipment such as similar packer or Cinder Machine at present is long, time cycle is long in the process of advancing and withdrawing, energy waste is big, be example with the Cinder Machine, suppose long 4 meters of master cylinder, movement velocity is pressed V=100mm/S and is calculated, the retraction speed of supposing to advance equates, then get off need be nearly 80 seconds for dust cycle, real effectively time of acting is about 40 seconds (returning skims is effective acting) during this, wherein 50% time is to do no recruitment, and the time cycle is long, manufacturing efficiency is low, and energy waste is big.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of little load high speed, heavy load low speed cylinder, to overcome the defective that exists in the prior art.Traditional oils cylinder structure and control mode are improved, under the situation of additionally not increasing input, shorten the operation cycle, boost productivity, reduce energy waste.
Technological scheme of the present invention is:
A kind of little load at a high speed, heavy load low speed cylinder, it is characterized in that: comprise cylinder body, piston, seal ring, hollow shape first piston bar, hollow shape second piston rod and in order to control the flexible control loop of oil cylinder; Wherein, the piston in second piston rod, one end and the cylinder body is connected, and the other end passes cylinder body; First piston bar one end is connected with cylinder body, and the other end penetrates second piston rod; Between second piston rod and the piston, between second piston rod and the cylinder body, and be provided with seal ring between first piston bar and second piston rod; Form piston cavity between cylinder body and the piston, form rod end chamber between cylinder body, second piston rod and the piston, form Compound Cavity between first piston bar and second piston rod; The end that first piston bar and cylinder body join is provided with the 3rd hydraulic fluid port, and the chamber wall of piston cavity is provided with first hydraulic fluid port, and the chamber wall of rod end chamber is provided with second hydraulic fluid port.
Described control loop comprises selector valve, sequence valve, one-way valve and Pilot operated check valve; Wherein, selector valve directly links to each other with second hydraulic fluid port with the 3rd hydraulic fluid port respectively, and selector valve links to each other with first hydraulic fluid port with Pilot operated check valve by sequence valve, one-way valve.
Described second piston rod is connected with piston by second attaching nut; The first piston bar is connected with cylinder body by first attaching nut.
Technique effect of the present invention is:
1, improves cylinder structure, increase a Compound Cavity and part pipeline fittings and just can make conventional cylinder into composite cylinder;
2, improve control loop, increase valve member and just control loop can be made into the control loop supporting with composite cylinder;
Solved the energy distribution un-reasonable phenomenon after 3 improvement, oil cylinder is obtained under little load at a high speed, the speed before keeping again improving under heavy load is boosted productivity, and does not influence normal technological action simultaneously again;
4, at prior art, structure and the control loop of the present invention by improving master cylinder makes in this oil cylinder working procedure energy distribution more reasonable under the situation of additionally not increasing input: in idle stroke (perhaps crying little load) time, advance at utmost speed, save time in the process of advancing is 27 seconds, do not shorten about 8 seconds before effectively acting (withdrawal) time ratio improves, through calculating: just saving time at a dust cycle is 8+27=35 second, the real work cycle is 80-35=45 second, working efficiency improves about 80/45=1.8 times, because time operation cycle shortens, the restriction loss of hydraulic system in a dust cycle reduces greatly, boosts productivity, reduce energy waste.
Description of drawings
Fig. 1 is existing cylinder structure schematic representation;
Fig. 2 is the structural representation of composite cylinder of the present invention;
Fig. 3 is existing oil cylinder control loop schematic diagram;
Fig. 4 is the control loop schematic diagram of composite cylinder of the present invention.
Reference character is:
1-selector valve, 2-sequence valve, 3-one-way valve, 4-Pilot operated check valve, 5-first piston bar, 6-the first attaching nut, 7-cylinder body, 8-the second attaching nut, 9-piston, 10-seal ring, 11-the second piston rod, a1-first hydraulic fluid port, a2-second hydraulic fluid port, a3-the 3rd hydraulic fluid port, the piston cavity of A1-traditional oil cylinder, A2-rod end chamber, A3-Compound Cavity, A4-piston cavity, S-stretch out, C-withdrawal.
Embodiment
The present invention relates to the field of energy-saving technology of equipment such as similar packer or Cinder Machine, be specially not increasing under the extra big situation about dropping into, by existing equipment oil cylinder and control loop are done the purpose that a little improvement reaches the shortening operation cycle, boosts productivity, reduces energy waste.
Referring to Fig. 2, Fig. 4, a kind of little load high speed that the present invention relates to, the concrete structure of heavy load low speed cylinder are:
Comprise cylinder body 7, piston 9, seal ring 10, hollow shape first piston bar 5, hollow shape second piston rod 11 and in order to control the flexible control loop of oil cylinder; Wherein,
Piston 9 in second piston rod, 11 1 ends and the cylinder body 7 is connected, and the other end passes cylinder body 7; First piston bar 5 one ends are connected with cylinder body 7, and the other end penetrates second piston rod 11;
Between second piston rod 11 and the piston 9, between second piston rod 11 and the cylinder body 7, and be provided with seal ring 10 between first piston bar 5 and second piston rod 11;
Form piston cavity A4 between cylinder body 7 and the piston 9, form rod end chamber A2 between cylinder body 7, second piston rod 11 and the piston 9, form Compound Cavity A3 between first piston bar 5 and second piston rod 11;
Control loop among the present invention specifically can comprise selector valve 1, sequence valve 2, one-way valve 3 and Pilot operated check valve 4; Wherein, selector valve 1 directly links to each other with the second hydraulic fluid port a2 with the 3rd hydraulic fluid port a3 respectively, and selector valve 1 links to each other with the first hydraulic fluid port a1 with Pilot operated check valve 4 by sequence valve 2, one-way valve 3.Its function is respectively:
Selector valve 1: in control loop by left and right sides electromagnet gets, dead electricity the is controlled oil cylinder shown in Figure 2 action of stretching, contract.
Sequence valve 2: setting its pressure in control loop is P1, suppose that oil cylinder does to stretch out action as shown in Figure 4 from left to right, the induced pressure that need overcome when system is during less than P1, get through selector valve 1 right position, system pressure oil does not enter piston cavity A4 from sequence valve 2 by hydraulic fluid port a1, but directly enter Compound Cavity A3 from hydraulic fluid port a3, and promoting piston fast and stretch out, this moment, piston cavity A4 passed through hydraulic fluid port a1 from the fuel tank oil suction; The induced pressure that need overcome when system is during greater than P1, system pressure oil directly enters power that Compound Cavity A3 produces when being not enough to promote piston and stretching out from hydraulic fluid port a3, when system oil pressure is increased to greater than P1 gradually, pressure oil not only still from hydraulic fluid port a3 enter Compound Cavity A3 and simultaneously opening sequence valve 2 enter piston cavity A4 by hydraulic fluid port a1, the common piston that promotes stretches out, but this moment, the piston speed of stretching out can reduce.
One-way valve 3: when position, selector valve 1 left side electric, fluid enters hydraulic fluid port a2 and promotes piston-retraction, the oil return of piston cavity A4 by one-way valve 3 and Pilot operated check valve 4 oil sump tanks, realizes oil cylinder fast retractile function through hydraulic fluid port a1.
Pilot operated check valve 4: when position, selector valve 1 left side electric, fluid enters hydraulic fluid port a2 and promotes piston-retraction, the oil return of piston cavity A4 by one-way valve 3 and Pilot operated check valve 4 oil sump tanks, realizes oil cylinder fast retractile function through hydraulic fluid port a1.
The piston cavity useful area of tradition oil cylinder is A11, and bar chamber useful area is A21, and this system is constant-voltage system, and the system pressure of setting up departments is P, and stroke is S, and speed is V1, and the flow by valve 1 is Q, A11=2A21,
Then oil cylinder maximum load force that can overcome in the process of advancing is:
F1=P*A11 (supposing that back oil cavity pressure is 0) ⑴
Then oil cylinder maximum load force that can overcome in the withdrawal process is:
F2=P*A21 (supposing that back oil cavity pressure is 0) ⑵
Because A11=2A21, F1=2F2 then, from the above: oil cylinder is not do useful work in the process of advancing, or approximately thinks that load is 0, but actual its load capacity that can overcome is enough big, does not give full play to its ability,
Forward velocity is:
V1=Q/A11 ⑶
The time that needs in the process of advancing is:
t1=S/V1=S*A11/Q ⑷
The piston cavity useful area of oil cylinder of the present invention is A41, and the rod end chamber useful area is A21, and the Compound Cavity useful area is that the vestibule that the tentative piston rod of A31(extends out is Compound Cavity) the system pressure of setting up departments is P, stroke is S, and speed is V2, and the flow by valve 1 is Q, A11=2A21
Oil cylinder maximum load force that can overcome in the process of advancing with Compound Cavity A3 oil-feed is:
F2=P*A31 (supposing that back oil cavity pressure is 0) ⑸
Forward velocity is:
V2=Q/A31 ⑹
The time that needs in the process of advancing is:
t2=S/V2 =S*A31/Q ⑺
Equate owing to enter the flow Q of piston cavity A1 and Compound Cavity A3, then ⑷, ⑺ two formulas are compared:
t2/t1=A31/A11＜1 ⑻
By formula ⑼ as can be known: promote oil cylinder by Compound Cavity A3 oil-feed and advance time of needing less than promoting the time that oil cylinder advances to be needed by piston cavity A1 oil-feed, suppose A31/A11=1/4(since sealing that piston rod is moved top speed is restricted, generally can not select too for a short time) namely illustrate and can advancement stage can save for 75% time, in addition because the process of advancing is idle stroke, load is approximately equal to 0, only overcoming the seal friction resistance gets final product, so by the ⑸ formula as can be known, also can promote oil cylinder fully by the oil-feed of A3 chamber advances.
Even in addition through after one section idle stroke, load has increased, and F2＜load, so being not enough to promote oil cylinder by Compound Cavity A3 oil-feed advances, as shown in Figure 4: pressure oil is except continuing to act on the Compound Cavity useful area A31, pressure oil enters piston cavity useful area A41 by sequence valve 2 via hydraulic fluid port a1 simultaneously, because A41 is than big many of A31, so can produce the load force that much bigger thrust is enough to overcome increase under the same oil pressure, still can promote oil cylinder and advance, can not influence normal manufacturing process.
In the withdrawal process, because selector valve 1 oil sump tank is partly passed through in the oil return of piston cavity, part is by Pilot operated check valve 4 direct oil sump tanks, so retraction speed does not increase before improving control loop, the used time is also than originally lacking in the withdrawal process accordingly.
In sum: traditional oil cylinder and control loop thereof in the process of advancing ability and efficient between be unmatched, by changing cylinder structure and improving control loop, not only do not influence the normal manufacturing process of oil cylinder, and can save the periodic duty cycle greatly, boost productivity, reduce energy waste.
Existing oil cylinder is improved:
Cylinder structure is modified into composite piston and piston rod construction by traditional oil cylinder (piston and piston rod construction).
As can be seen from Figure 1: the piston cavity useful area of traditional oil cylinder is A11, bar chamber useful area is A21, pressure oil enters piston cavity A1 from the first hydraulic fluid port a1 and promotes piston rod and stretch out when advancing, and pressure oil enters bar chamber A2 from the second hydraulic fluid port a2 and promotes the piston rod withdrawal during withdrawal.
As can be seen from Figure 2: it is A41 that oil cylinder of the present invention can be divided into the piston cavity useful area, bar chamber useful area is A21, the Compound Cavity useful area is A31, be combined into the control loop shown in Figure 4 that adapts to this oil cylinder, pressure oil earlier enters Compound Cavity A3 from the 3rd hydraulic fluid port a3 and promotes second piston rod 11 and piston 9 fast and advance when stretching out, this moment piston cavity A4 by one-way valve 3 and Pilot operated check valve 4 from the fuel tank repairing, load increases in the process of advancing, when entering Compound Cavity A3 and promote fast power that second piston rod 11 and piston 9 advance and be not enough to overcome load from the 3rd hydraulic fluid port a3, the pressure oil oil pressure continues to increase, when oil pressure is increased to the pressure of sequence valve 2 settings, high-pressure oil not only from the 3rd hydraulic fluid port a3 enter Compound Cavity A3 but also from the first hydraulic fluid port a1 enter piston cavity A4 simultaneously high thrust promote second piston rod 11 and piston 9 overcomes the load low-speed forward, pressure oil enters bar chamber A2 from the second hydraulic fluid port a2 and promotes the piston rod withdrawal during withdrawal, the fluid of piston cavity A4 is by selector valve 1 and Pilot operated check valve 4 oil sump tanks during the withdrawal, the compare low-speed forward low speed withdrawal of Fig. 1 and traditional oil cylinder shown in Figure 3 and control loop, realized that low load advances at utmost speed, the desirable energy-conservation operating mode of heavy load low-speed forward.This high, low speed transfer process of the present invention is along with the variation of external loading is carried out automatically, does not need human intervention.
Working principle of the present invention is:
As shown in Figure 4, when not needing oil cylinder to overcome heavy load, selector valve 1 commutation, pressure oil acts on the Compound Cavity useful area A31 via hydraulic fluid port a3, under same flow and pressure, promoting oil cylinder with less power and higher speed advances, oil cylinder advances in the process, piston cavity A4 passes through Pilot operated check valve 4 oil suctions via hydraulic fluid port a1, rod end chamber A2 arrives fuel tank via hydraulic fluid port a2 by selector valve 1 oil extraction, when load in the process of advancing increases gradually or suddenly, when pressure oil acts on power that Compound Cavity useful area A31 produces and is not enough to overcome load force, pressure oil is except continuing to act on the Compound Cavity useful area A31, and pressure oil enters piston cavity useful area A41 by sequence valve 2 via hydraulic fluid port a1 simultaneously, because A41 is than big many of A31, so can produce the load force that much bigger thrust is enough to overcome increase under the same oil pressure, the speed of only advancing can reduce, but because this period proportion in whole work period is very little, so total operation cycle still shortens much.
When oil cylinder is withdrawn, the fluid of piston cavity is through one-way valve 3 and Pilot operated check valve 4 oil sump tanks, because one-way valve 3 and Pilot operated check valve 4 flow-rate ratios are bigger, the very fast oil sump tank of the fluid of piston cavity, so retraction speed does not increase before improving control loop, the used time is also than originally lacking in the withdrawal process accordingly.
The parts that present embodiment is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (3)
- One kind little load at a high speed, heavy load low speed cylinder, it is characterized in that: comprise cylinder body (7), piston (9), seal ring (10), hollow shape first piston bar (5), hollow shape second piston rod (11) and in order to control the flexible control loop of oil cylinder; Wherein, the piston (9) in second piston rod (11) one ends and the cylinder body (7) is connected, and the other end passes cylinder body (7); First piston bar (5) one ends are connected with cylinder body (7), and the other end penetrates second piston rod (11); Between second piston rod (11) and the piston (9), between second piston rod (11) and the cylinder body (7), and be provided with seal ring (10) between first piston bar (5) and second piston rod (11); Form piston cavity (A4) between cylinder body (7) and the piston (9), form rod end chamber (A2) between cylinder body (7), second piston rod (11) and the piston (9), form Compound Cavity (A3) between first piston bar (5) and second piston rod (11); First piston bar (5) is provided with the 3rd hydraulic fluid port (a3) with the end that cylinder body (7) joins, and the chamber wall of piston cavity (A4) is provided with first hydraulic fluid port (a1), and the chamber wall of rod end chamber (A2) is provided with second hydraulic fluid port (a2).
- 2. according to the described little load high speed of claim 1, heavy load low speed cylinder, it is characterized in that: described control loop comprises selector valve (1), sequence valve (2), one-way valve (3) and Pilot operated check valve (4); Wherein, selector valve (1) directly links to each other with second hydraulic fluid port (a2) with the 3rd hydraulic fluid port (a3) respectively, and selector valve (1) links to each other with first hydraulic fluid port (a1) with Pilot operated check valve (4) by sequence valve (2), one-way valve (3).
- According to claim 1 or 2 described little loads at a high speed, heavy load low speed cylinder, it is characterized in that: described second piston rod (11) is connected with piston (9) by second attaching nut (8); First piston bar (5) is connected with cylinder body (7) by first attaching nut (6).
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| CN201310182564.7A CN103291685B (en) | 2013-05-17 | 2013-05-17 | A kind of little load high speed, heavy load low speed cylinder |
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| CN201310182564.7A CN103291685B (en) | 2013-05-17 | 2013-05-17 | A kind of little load high speed, heavy load low speed cylinder |
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| CN103291685B CN103291685B (en) | 2015-09-16 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452949A (en) * | 2013-09-16 | 2013-12-18 | 大连宏远气动液压船舶辅机有限公司 | Energy-saving double-speed hydraulic compression composite oil cylinder |
| CN103671344A (en) * | 2013-12-18 | 2014-03-26 | 中联重科股份有限公司 | Pumping oil cylinder and pumping equipment provided with pumping oil cylinder |
| CN103934425A (en) * | 2014-04-18 | 2014-07-23 | 中国重型机械研究院股份公司 | Hydraulic dynamic secondary cooling water width cut control system |
| CN104235115A (en) * | 2014-09-17 | 2014-12-24 | 青特集团有限公司 | Running buffer type hydraulic oil cylinder |
| CN104653542A (en) * | 2015-03-11 | 2015-05-27 | 江苏大道机电科技有限公司 | Mold opening and closing oil cylinder structure for large hollow blow molding machine |
| CN105927611A (en) * | 2016-07-12 | 2016-09-07 | 中国重型机械研究院股份公司 | Double-plunger type compound hydraulic cylinder device |
| CN107442611A (en) * | 2016-05-31 | 2017-12-08 | 小松产机株式会社 | Plate bending machine and bending method |
| CN108050123A (en) * | 2017-11-29 | 2018-05-18 | 重庆维庆液压机械有限公司 | Two-way Hydraulic Cylinder |
| CN116175717A (en) * | 2022-11-29 | 2023-05-30 | 苏州艾维科斯园林设备有限公司 | Bidirectional rapid energy-saving efficient hydraulic log splitter |
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| CN2937586Y (en) * | 2006-08-16 | 2007-08-22 | 天津市天锻压力机有限公司 | Compound hydraulic cylinder with quick driving device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452949A (en) * | 2013-09-16 | 2013-12-18 | 大连宏远气动液压船舶辅机有限公司 | Energy-saving double-speed hydraulic compression composite oil cylinder |
| CN103671344A (en) * | 2013-12-18 | 2014-03-26 | 中联重科股份有限公司 | Pumping oil cylinder and pumping equipment provided with pumping oil cylinder |
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| CN103934425A (en) * | 2014-04-18 | 2014-07-23 | 中国重型机械研究院股份公司 | Hydraulic dynamic secondary cooling water width cut control system |
| CN104235115A (en) * | 2014-09-17 | 2014-12-24 | 青特集团有限公司 | Running buffer type hydraulic oil cylinder |
| CN104653542A (en) * | 2015-03-11 | 2015-05-27 | 江苏大道机电科技有限公司 | Mold opening and closing oil cylinder structure for large hollow blow molding machine |
| CN107442611B (en) * | 2016-05-31 | 2021-06-01 | 小松产机株式会社 | Plate bending machine |
| CN107442611A (en) * | 2016-05-31 | 2017-12-08 | 小松产机株式会社 | Plate bending machine and bending method |
| CN105927611A (en) * | 2016-07-12 | 2016-09-07 | 中国重型机械研究院股份公司 | Double-plunger type compound hydraulic cylinder device |
| CN108050123B (en) * | 2017-11-29 | 2019-04-12 | 重庆维庆液压机械有限公司 | Two-way Hydraulic Cylinder |
| CN108050123A (en) * | 2017-11-29 | 2018-05-18 | 重庆维庆液压机械有限公司 | Two-way Hydraulic Cylinder |
| CN116175717A (en) * | 2022-11-29 | 2023-05-30 | 苏州艾维科斯园林设备有限公司 | Bidirectional rapid energy-saving efficient hydraulic log splitter |
| CN116175717B (en) * | 2022-11-29 | 2023-11-14 | 苏州艾维科斯园林设备有限公司 | Bidirectional rapid energy-saving efficient hydraulic log splitter |
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