CN104632770A - Supporting structure and method of large horizontal type heavy-load servo hydraulic cylinder - Google Patents
Supporting structure and method of large horizontal type heavy-load servo hydraulic cylinder Download PDFInfo
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- CN104632770A CN104632770A CN201410845093.8A CN201410845093A CN104632770A CN 104632770 A CN104632770 A CN 104632770A CN 201410845093 A CN201410845093 A CN 201410845093A CN 104632770 A CN104632770 A CN 104632770A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
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Abstract
The invention provides a supporting structure and method of a large horizontal type heavy-load servo hydraulic cylinder. The servo hydraulic cylinder comprises a cylinder block (2), a piston rod (1) and a piston (3), and the bottom of the front end of the cylinder block (2) is hinged to a workbench. The servo hydraulic cylinder comprises a supporting hydraulic cylinder (8) hinged to the bottom of the rear end of the cylinder block (2), and the bottom of the supporting hydraulic cylinder (8) is connected with a pressure sensor (4) which monitors and feeds back pressure of a non-rod end chamber of the supporting hydraulic cylinder (8) at any time. Because of the design of the supporting structure and method, the stress structure of the servo hydraulic cylinder is changed, all working condition reliable supporting of the horizontal type heavy-load servo hydraulic cylinder can be achieved, contact force between a guide sleeve and the piston rod and between the piston and a cylinder barrel is reduced or eliminated, lots of hazards caused by self weight of the cylinder block are greatly relieved or avoided, the stress condition of sealed parts is improved, the performance of the horizontal type heavy-load servo hydraulic cylinder is improved, the service life of the servo hydraulic cylinder is greatly prolonged, and the application working condition is widened.
Description
Technical field
The invention belongs to servo hydraulic cylinder field, be specifically related to the installation supporting of the high performance servo hydraulic cylinder of large-size horizontal heavy duty, it is applicable to the multiple occasion of the industries such as the large-scale metallurgical such as heavy duty, horizontal, hinged installation oil hydraulic cylinder equipment.
Background technique
In engineering practice, a lot of oil hydraulic cylinder adopts horizontally-mounted form, due to the impact of cylinder own wt and outer load characteristic, can cause there is larger contact force between piston and cylinder barrel.Horizontal servo oil hydraulic cylinder is commonly used in the situation of level or inclined work, due to some complex working conditions, also needs oil hydraulic cylinder operationally to have small size swing, therefore usually adopts hinged installation form.Under some operating modes such as metallurgy industry, large-scale heavy duty oil hydraulic cylinder need be adopted, cylinder barrel own wt often reaches several tons even heavier, make the contact forces of piston and cylinder barrel very large, because larger frictional force has a strong impact on the output characteristics of servocylinder, larger hidden danger is brought to the performance of equipment and reliable operation.The ouput force of horizontal servo cylinder needs very large, the volume of oil hydraulic cylinder is also very large, namely the deadweight of oil cylinder is just very large, need oil hydraulic cylinder to have the swing of certain amplitude when working in addition, namely the output terminal of piston rod is by certain curve ouput force, separately with a hinging structure will certainly produce scuffing of cylinder bore, sealing wear seriously, the phenomenon such as leakage of oil, servocylinder is done great damage, the properties of servo hydraulic cylinder seriously reduces, and causes the life-span of servo hydraulic cylinder greatly to shorten.
The heavily loaded horizontal servo oil hydraulic cylinder that tradition adopts hinging structure to install, cylinder barrel is as shown in Figure 2 stressed.F1 be oil hydraulic cylinder front cover guide sleeve place piston rod to the active force of oil hydraulic cylinder, F2 is the support force of cylinder barrel articulating point to oil hydraulic cylinder, and G is the deadweight of oil hydraulic cylinder itself, and F3 is the active force of piston to cylinder barrel; L1, L, L3 are respectively the moment of corresponding O point (i.e. the articulating point of cylinder barrel).Following equation can be obtained thus:
Equilibrium equation formula: F1+G=F2+F3
Torque equilibrium equation formula: F1*L1+F3*L3=G*L
From equilibrium equation formula, the deadweight G of oil hydraulic cylinder, the support force F2 that a part is provided by articulating point balances, the remaining force be not balanced will by the piston action bottom oil hydraulic cylinder on the upside of cylinder barrel, namely power F3 is produced, and act on oil hydraulic cylinder front end guide sleeve and piston rod joint, namely produce power F1.
Be constant according to torque equilibrium equation formula: G again, the weight of cylinder barrel, piston and piston rod is that constant is constant.Along with piston rod is done manual work, piston rod moves forward, because the weight of oil hydraulic cylinder mainly concentrates on cylinder body, because the change of the moment L of the caused G of piston reach is negligible, so G*L item can be considered as constant.So, when piston rod is done manual work, moment L3 can reduce, and L, L1 remain unchanged, thus equation is just known thus, because L3 reduces, set up to make equation, F3 so will be caused to increase, or F2 increases, or F3, F2 increases, namely add the active force between piston rod and cylinder body: the two increases, or namely one increase increases guide sleeve and piston rod, the frictional force of piston and cylinder barrel, like this will the ouput force of lossy oil hydraulic cylinder greatly, the seal arrangement of oil hydraulic cylinder is caused to damage, if cause power F2, F3 is very large, so also can produce guide sleeve wearing and tearing, leakage of sealing device, the phenomenons such as scuffing of cylinder bore, oil hydraulic cylinder can be made time serious to scrap.
Summary of the invention
In order to solve the problem, the invention provides the supporting structure of a kind of large-size horizontal heavy duty servo hydraulic cylinder, described servo hydraulic cylinder comprises cylinder body, piston rod and piston, front bottom end and the worktable of cylinder body are hinged, comprise supporting cylinder, be hinged on bottom horizontal servo cylinder rear end, Bonding pressure sensor bottom supporting cylinder, monitors and feeds back the pressure of supporting cylinder at any time.
Wherein, bottom supporting cylinder, connect pressure oil, by independently oil sources fuel feeding after proportional pressure-reducing valve regulates.
Wherein, oil sources comprises fuel tank and oil hydraulic pump, and proportional pressure-reducing valve is arranged on oil hydraulic pump output terminal.
The invention also discloses the bearing method of a kind of large-size horizontal heavy duty servo hydraulic cylinder, described servo hydraulic cylinder comprises cylinder body, piston rod and piston, wherein,
By the front bottom end of cylinder body and worktable hinged;
By hinged with supporting cylinder bottom the rear end of cylinder body;
At the bottom Bonding pressure sensor of supporting cylinder, monitor and feed back the pressure of supporting cylinder at any time.
Wherein, pressure transducer is monitored at any time and is fed back the rodless cavity pressure of supporting cylinder, and proportional pressure-reducing valve sets system liquid force feed parameter according to detecting the data obtained.
Wherein, when servo hydraulic cylinder bears load, supporting cylinder, according to the collapsing length of the size and Orientation adjustment piston rod of load, namely adjusts the size to the support force of horizontal servo cylinder and direction.
Wherein, when the load that servo hydraulic cylinder bears keeps substantially horizontal constant, supporting cylinder is according to the data detecting feedback, and make piston rod stretch out certain length, the support force exporting corresponding size carrys out the deadweight of balance hydraulic cylinder.
Wherein, when horizontal servo hydraulic cylinder works needs to rotate, piston rod acts on load, and when needing curve of output power, supporting cylinder is according to self piston rod collapsing length of the corresponding adjustment of feedback data, and namely adjustment exports the size of support force.
Design of the present invention changes the force structure of oil hydraulic cylinder, and automatically can adjust along with operating mode, the many unfavorable result that the piston rod greatly alleviated or avoid the deadweight because of horizontal servo oil hydraulic cylinder to cause contacts with cylinder body and causes, improve the stressing conditions at sealing position, improve the performance of heavily loaded horizontal servo cylinder and substantially prolongs life-span of servocylinder, having widened the application operating mode of servocylinder.
Accompanying drawing explanation
Fig. 1: the supporting structure schematic diagram of large-size horizontal heavy duty servo hydraulic cylinder of the present invention;
Fig. 2: the horizontal heavily loaded servo hydraulic cylinder cylinder barrel free-body diagram that tradition adopts hinging structure to install;
Fig. 3: the supporting structure cylinder barrel free-body diagram of large-size horizontal heavy duty servo hydraulic cylinder of the present invention.
Description of reference numerals:
1-piston rod; 2-cylinder body;
3-piston; 4-pressure transducer;
5-proportional pressure-reducing valve; 6-fuel tank;
7-oil hydraulic pump; 8-supporting cylinder;
A, B, C are revolute pair, and Placement is hinged.
Embodiment
Below in conjunction with accompanying drawing, the present invention is specifically described.
As shown in Figure 1, horizontal servo oil hydraulic cylinder of the present invention comprises cylinder body 2, piston rod 1, piston 3, also comprises supporting cylinder 8, is connected with pressure transducer 4 bottom supporting cylinder 8.
As shown in Figure 1, horizontal servo oil hydraulic cylinder cylinder body 2 front bottom end and worktable realize hinged after, cylinder body 2 rear end bottom-hinged one supporting cylinder 8.Pressure oil is connect, by independently oil sources fuel feeding after proportional pressure-reducing valve 5 regulates bottom this supporting cylinder 8.To parameter monitorings such as piston 3 displacements of horizontal servo oil hydraulic cylinder.Bonding pressure sensor 4 bottom supporting cylinder 8, monitoring and feedback hydraulic cylinder rodless cavity pressure at any time, proportional pressure-reducing valve 5 sets system liquid force feed parameter according to detecting the data obtained, the full working scope that can realize horizontal heavily loaded servocylinder thus reliably supports, and reduces or eliminates guide sleeve and piston rod, contact force between piston and cylinder barrel.
When horizontal servo oil hydraulic cylinder bears load, namely supporting cylinder 8 according to the collapsing length of self piston rod of size and Orientation adjustment of load, can export the support force of corresponding size.When the load that horizontal servo oil hydraulic cylinder bears keeps substantially horizontal constant, supporting cylinder 8 can according to the data detecting feedback, self piston rod is made to stretch out certain length, export the support force of corresponding size to balance the deadweight of horizontal servo oil hydraulic cylinder, and can protract along with the piston rod 1 of horizontal servo oil hydraulic cylinder, piston 3 moves forward, supporting cylinder 8 can according to the corresponding adjustment support force of pressure monitoring data, makes the line of A, B two between revolute pair concordant with axis all the time.When horizontal servo hydraulic cylinder works needs to rotate, piston rod 1 acts on load, and when needing curve of output power, supporting cylinder 8 understands the size according to self piston rod collapsing length of the corresponding adjustment of feedback data and ouput force.
Horizontal servo Barrel of Hydraulic Cylinders of the present invention is as shown in Figure 3 stressed.
Equilibrium equation formula: F1+G=F2+F3+F4
Torque equilibrium equation formula: F1*L1+F3*L3+F4*L4=G*L
From in Fig. 1 and Fig. 3, F4 is the support force that supporting cylinder 8 acts on oil hydraulic cylinder, and corresponding L4 is for supporting moment, the same Fig. 2 of other symbol implications.In whole working procedure, the length of L4 is constant.
From equilibrium equation formula, the deadweight G of horizontal servo oil hydraulic cylinder, the support force F4 that the support force F2 that a part is provided by articulating point and supporting cylinder 8 are supplied to horizontal servo oil hydraulic cylinder balances, namely will do not produced power F3 by the upside bottom cylinder barrel of the piston action bottom oil hydraulic cylinder by the remaining power of these two equilibrium of forces, and act on oil hydraulic cylinder front end guide sleeve and piston rod joint produces power F1.From above-mentioned equilibrium equation formula, if the support force F4 that supporting cylinder 8 provides is enough large, so the power F2 acting in conjunction that provides of F4 and servo hydraulic cylinder front end articulating point just can the deadweight of balance hydraulic cylinder, the directed force F 3 of piston and cylinder barrel thus, the directed force F 1 of oil hydraulic cylinder front end guide sleeve and piston rod all reduces, to such an extent as to this two power disappears.
Again according to torque equilibrium equation formula: owing to G*L item can be considered as constant, so, when piston rod is done manual work, moment L3 reduces, and L4, L, L1 are constant; When supporting cylinder 8 provides an enough large support force F4 for horizontal servo oil hydraulic cylinder, due to the reduction of L3, from momental equation, F4*L4 just can balance G*L item, if F4 is enough large, so F1 and F3 will be enough little along with the increase of F4, to such an extent as to this two power disappears.
In summary, design of the present invention, had both met power equation and had also met moment equation.The supporting force that additional supporting cylinder 8 provides for horizontal servo oil hydraulic cylinder is along with the size of the change passing ratio reduction valve adjustment supporting force of self piston stroke, make the piston rod of horizontal servo oil hydraulic cylinder and cylinder cap guide sleeve, active force between piston and cylinder barrel reduces greatly, to such an extent as to disappear, significantly reduce the stressed of sealing configuration thus, avoid oil leakage phenomenon, overcome the impact of frictional force, improve servocylinder Frequency Response, greatly can extend the life-span of servo hydraulic cylinder, widen application and the applying working condition of oil hydraulic cylinder.
Claims (9)
1. the supporting structure of a large-size horizontal heavy duty servo hydraulic cylinder, described servo hydraulic cylinder comprises cylinder body (2), piston rod (1) and piston (3), front bottom end and the worktable of cylinder body (2) are hinged, it is characterized in that: comprise supporting cylinder (8), be hinged on bottom cylinder body (2) rear end, supporting cylinder (8) bottom Bonding pressure sensor (4), monitors and feeds back the rodless cavity pressure of supporting cylinder (8) at any time.
2. supporting structure according to claim 1, is characterized in that: supporting cylinder (8) bottom connects pressure oil, by independently oil sources fuel feeding after proportional pressure-reducing valve (5) regulates.
3. supporting structure according to claim 2, is characterized in that: oil sources comprises fuel tank (6) and oil hydraulic pump (7), and proportional pressure-reducing valve (5) is arranged on oil hydraulic pump (7) output terminal.
4. a bearing method for large-size horizontal heavy duty servo hydraulic cylinder, described servo hydraulic cylinder comprises cylinder body (2), piston rod (1) and piston (3), it is characterized in that:
By the front bottom end of cylinder body (2) and worktable hinged;
By hinged with supporting cylinder (8) bottom the rear end of cylinder body (2);
In bottom Bonding pressure sensor (4) of supporting cylinder (8), monitor and feed back the rodless cavity pressure of supporting cylinder (8) at any time.
5. bearing method according to claim 4, is characterized in that: supporting cylinder (8) bottom connects pressure oil, by independently oil sources fuel feeding after proportional pressure-reducing valve (5) regulates.
6. bearing method according to claim 5, is characterized in that: pressure transducer (4) is monitored at any time and fed back the rodless cavity pressure of supporting cylinder, and proportional pressure-reducing valve (5) sets system liquid force feed parameter according to detecting the data obtained.
7. the bearing method according to any one of claim 4-6, it is characterized in that: when servo hydraulic cylinder bears load, supporting cylinder (8) is according to the collapsing length of self piston rod of size and Orientation adjustment of load, and namely adjustment exports size and the direction of support force.
8. the bearing method according to any one of claim 4-7, it is characterized in that: when the load that servo hydraulic cylinder (2) bears keeps substantially horizontal constant, supporting cylinder, according to the data detecting feedback, makes self piston rod stretch out certain length, balances the deadweight of servo hydraulic cylinder (2).
9. the bearing method according to any one of claim 4-7, it is characterized in that: when servo hydraulic cylinder (2) need of work rotates, piston rod (1) acts on load, when needing curve of output power, supporting cylinder (8), according to self piston rod collapsing length of the corresponding adjustment of feedback data, namely adjusts the size of ouput force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410845093.8A CN104632770A (en) | 2014-12-31 | 2014-12-31 | Supporting structure and method of large horizontal type heavy-load servo hydraulic cylinder |
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| CN201410845093.8A CN104632770A (en) | 2014-12-31 | 2014-12-31 | Supporting structure and method of large horizontal type heavy-load servo hydraulic cylinder |
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| CN104632770A true CN104632770A (en) | 2015-05-20 |
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| CN201410845093.8A Pending CN104632770A (en) | 2014-12-31 | 2014-12-31 | Supporting structure and method of large horizontal type heavy-load servo hydraulic cylinder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288944A (en) * | 2017-06-17 | 2017-10-24 | 无锡德林防务装备股份有限公司 | Fairlead float support hydraulic system |
| CN110173481A (en) * | 2019-05-29 | 2019-08-27 | 太原科技大学 | A kind of inclined load cooperates with the hydraulic test bench control system of compensation with self weight |
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| JP2002081404A (en) * | 2000-09-05 | 2002-03-22 | Mitsubishi Heavy Ind Ltd | Pneumatic-hydraulic speed adjusting mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288944A (en) * | 2017-06-17 | 2017-10-24 | 无锡德林防务装备股份有限公司 | Fairlead float support hydraulic system |
| CN110173481A (en) * | 2019-05-29 | 2019-08-27 | 太原科技大学 | A kind of inclined load cooperates with the hydraulic test bench control system of compensation with self weight |
| CN110173481B (en) * | 2019-05-29 | 2020-07-03 | 太原科技大学 | Hydraulic test bed control system with offset load and dead weight cooperative compensation |
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Application publication date: 20150520 |