CN101260896B - Double-action plunger type reciprocating movement hydraulic cylinder - Google Patents
Double-action plunger type reciprocating movement hydraulic cylinder Download PDFInfo
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- CN101260896B CN101260896B CN2008100177148A CN200810017714A CN101260896B CN 101260896 B CN101260896 B CN 101260896B CN 2008100177148 A CN2008100177148 A CN 2008100177148A CN 200810017714 A CN200810017714 A CN 200810017714A CN 101260896 B CN101260896 B CN 101260896B
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- cylinder barrel
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Abstract
The invention relates to a hydraulic power device, in particular to a double-acting plunger-type reciprocating hydraulic cylinder which drives mechanic members to reciprocate, the hydraulic power device at least comprises a cylinder barrel, a plunger and a plunger sealing member (12), the hydraulic power device is characterized in that the cylinder barrel comprises an upper cylinder barrel and a lower cylinder barrel, the insides of which are provided with the plungers sealed by the plunger sealing member (12), two sides of the plungers are stretched with double-wing plates (6) which are connected with exterior mechanic parts through a frame (3) and a connection board (1); the upper cylinder barrel and the lower cylinder barrel as well as upper surface and lower surface of the plunger are formed into an upper closed oil cavity and a lower closed oil cavity which are respectively provided with a hydraulic oil inlet/outlet. The hydraulic power device has the advantages of excellent reliability, long service life and high sensibility.
Description
Technical field
The present invention relates to a kind of hydraulic power unit, the double-action plunger type reciprocating movement hydraulic cylinder that particularly a kind of driving device member moves back and forth.
Background technique
Hydraulic cylinder device consists of the following components usually: be contained in the piston of cylinder barrel inside, stretch out the piston rod of cylinder body outside, front and back cylinder cap, Sealing.Sealing has motive sealing and static seal.Static seal prevent liquid from cylinder cap to external leakage, the piston motive sealing prevents the leakage between two oil pockets of oil hydraulic cylinder, the piston rod motive sealing prevent liquid from piston rod to external leakage.Pistons reciprocating bar and Sealing produce the sassafras wearing and tearing that rub, and this sassafras wearing and tearing that rub are along with pressure surge and service time prolong and aggravates.Cause seal failure, the piston rod wearing and tearing, to external leakage, oil hydraulic cylinder can not continue to use liquid from piston rod.The static seal at cylinder cap place also can damage because of sealing part excesssive gap Sealing is extruded groove under change impacts pressure, and long-term use also can cause liquid to external leakage because of the Sealing aged deterioration damages.
Summary of the invention
The purpose of this invention is to provide a kind of good reliability, long service life, highly sensitive double-action plunger type reciprocating movement hydraulic cylinder.
For achieving the above object, technological scheme of the present invention is: double-action plunger type reciprocating movement hydraulic cylinder, which comprises at least cylinder barrel, plunger and plunger seal, it is characterized in that: cylinder barrel is cylinder barrel up and down, plunger by the plunger seal sealing is arranged in cylinder barrel inside up and down, two wing-shaped plates are stretched out in the plunger both sides, and two wing-shaped plates that stretch out both sides are connected with the exterior mechanical parts with connecting plate by framework; Cylinder barrel and plunger top and bottom form oil closed cavity up and down up and down, and oil closed cavity has the hydraulic oil manhole appendix up and down.
Described plunger both sides are stretched out two wing-shaped plates and are connected by framework with the exterior mechanical parts.
Two wing-shaped plates that described plunger stretches out and plunger are made an integral body.
Described plunger is connected as a whole with two wing-shaped plates by link.
Described Sealing comprises two cover primary seals, secondary sealing and dust sealing, and two cover sealings are set in two ends.
A control valve piece is installed on the described cylinder barrel, the servo control element electrohydraulic control is arranged on the valve piece, epicoele turnover oilhole A, the cavity of resorption turnover oilhole B of oil hydraulic cylinder and the output oil hole epicoele turnover oilhole A of electrohydraulic control, cavity of resorption turnover oilhole B directly are communicated with by the control valve piece, form the oil hydraulic circuit of Hydrauservo System proper functioning.
Described framework has two arms to be connected on two wing-shaped plates with screw and plunger moves together.
Two arms of described connecting plate and framework are connected with screw and follow plunger and move together.
Two cover guide bearings are installed on the arm of described framework.
Advantage of the present invention is: as piston, used the plunger motive sealing identical with the piston motive sealing with two plungers.Cancel piston rod and cylinder cap, do not had piston rod motive sealing cylinder cap static seal, avoided the sassafras wearing and tearing that rub of piston rod and piston rod motive sealing, avoided the inefficacy of cylinder cap static seal.Effectively prevent the leakage of hydraulic cylinder piston rod and cylinder cap place liquid, the reliability and the sensitivity that have improved oil hydraulic cylinder have prolonged oil hydraulic cylinder working life.
Description of drawings
The present invention will be further described below in conjunction with embodiment's accompanying drawing.
Fig. 1 is an embodiment of the invention structural front view schematic representation;
Fig. 2 is the plan view of Fig. 1.
Among the figure: 1, connecting plate; 2, cylinder barrel fastening flange; 3, framework; 4, guide bearing; 5, go up cylinder barrel; 6, two wing-shaped plates; 7, following cylinder barrel; 8, breathing pipe; 9, displacement transducer; 10, protective housing; 11, lower plunger; 12, plunger seal; 13, plunger guide ring; 14, upper plug; A, epicoele turnover oilhole; B, cavity of resorption turnover oilhole; CA, pore; M, control valve plate connect screw.
Embodiment
As shown in Figure 1, double-action plunger type reciprocating movement hydraulic cylinder, which comprises at least cylinder barrel, plunger and plunger seal 12, cylinder barrel is a cylinder barrel up and down, plunger by plunger seal 12 sealings is arranged in cylinder barrel inside up and down, two wing-shaped plates 6 are stretched out in the plunger both sides, and two wing-shaped plates 6 that stretch out both sides are connected with the exterior mechanical parts with connecting plate 1 by framework 3; Cylinder barrel and plunger top and bottom form oil closed cavity up and down up and down, and oil closed cavity has the hydraulic oil manhole appendix up and down.Hydraulic oil can be liquid medium.
Cylinder barrel fastening flange 2 is fixed on the basis, and is connected with last cylinder barrel 5 usefulness screws, and last cylinder barrel 5 usefulness screws are connecting to descend cylinder barrel 7.Plunger is in last cylinder barrel 5 and following cylinder barrel 7, and plunger can be connected and composed by upper plug 14 and lower plunger 11, and the plunger that is connected with wing plate is moving reciprocatingly in the cylinder barrel up and down.Upper plug 14, lower plunger 11 and double-vane plate 6 can be made an integral body or individual components connects as one.
Two wing-shaped plate 6 usefulness screws are connected with screw with two arms of framework 3, and 3 two arms of framework are connected with connecting plate 1 usefulness screw and follow plunger and move together.Do by driven mechanical component that is threaded at connecting plate 1 middle part and to pump.
When plunger piston fluid pressure cylinder moves reciprocatingly, in order to prevent that plunger (upper plug 14, lower plunger 11) from rotating, two cover guide bearings 4 (rolling bearing) are installed on an arm of framework 3, and frictional force was very little when bearing rolled on the Q plane of last cylinder barrel 5, had limited the degrees of freedom that plunger rotates.
Upper plug 14, lower plunger 11 are made up of plunger seal 12 (comprising primary seal, secondary sealing and dust sealing) and plunger guide ring 13 in the sealing of last cylinder barrel 5 and following cylinder barrel 7.Initial compression amount between design primary seal, secondary sealing and dust sealing and the plunger makes it to produce suitable initial contact stress.Such design method can make sealing stop the leakage of fluid, can avoid excessive frictional loss and too fast wearing and tearing again.The characteristics that this sealing system has servo hydraulic cylinder does not have leakage, frictional force is low, reliability is high, the life-span is long.
Displacement transducer 9 also can be contained in the oil hydraulic cylinder outside.On for example parallel another arm that is contained in framework (arm is equipped with rolling bearing) with plunger, the contact of discord fluid, reliable performance, demolition and maintenance are (promptly do not take oil hydraulic cylinder apart, just can install and remove displacement transducer and magnet ring) easily.
The present invention is used as servo-controlled oil hydraulic cylinder.Displacement transducer 9 can with the coaxial cylinder barrel bottom (as accompanying drawing) that is contained in of plunger.Breathing pipe 8 is used to transmit air protection displacement transducer 9.Protective housing 10 prevents displacement transducer 9 mechanical deteriorations.
When using as servo hydraulic cylinder, connect screw M by four control valve plates on the P plane control valve piece is installed, the servo control element electrohydraulic control is arranged on the valve piece, two cavity oil hole epicoele turnover oilhole A, the cavity of resorption turnover oilhole B of oil hydraulic cylinder and output oil hole epicoele turnover oilhole A, the cavity of resorption turnover oilhole B of electrohydraulic control directly are communicated with by the control valve piece, form the oil hydraulic circuit of Hydrauservo System proper functioning.Pore CA feeds compressed gas the position that last lower plunger exposes cylinder barrel is purged, and prevents that dust and dirt from entering lower plunger and cylinder barrel.
Oil hydraulic cylinder shown in the accompanying drawing is for being used as servo-controlled oil hydraulic cylinder.Cylinder barrel is fixed, the plunger frame movement.Two plungers are isometrical.Cylinder barrel head flanges formula is vertically installed.Displacement transducer can with the coaxial cylinder barrel bottom of being contained in down of plunger.
When oil hydraulic cylinder moves reciprocatingly, rotate in order to prevent plunger, two cover guide bearings 4 (rolling bearing) are installed on an arm of framework 3, frictional force was very little when bearing rolled on the Q plane of last cylinder barrel 5, had limited the degrees of freedom that plunger rotates.
Oil hydraulic cylinder shown in the accompanying drawing is for being used as servo-controlled oil hydraulic cylinder.Cylinder barrel is fixed, the plunger frame movement.Two plungers are isometrical.Cylinder barrel head flanges formula is vertically installed.Displacement transducer 9 can with the coaxial cylinder barrel bottom of being contained in of plunger.
Dynamic performance (sensitivity of response and rapidity) formula according to the reflection oil hydraulic cylinder:
In the formula
β
eThe comprehensive elastic feel quantity of liquid, Sealing, cylinder barrel material in the-oil closed cavity.
The effective active area of A-plunger.
The quality of M-plunger (piston) and connected element.
The effective volume of liquid in the V-oil closed cavity.
ω
h-power system natural frequency.
Same function area A and stroke S, the volume V of liquid in the oil closed cavity that the plunger of oil hydraulic cylinder of the present invention and cylinder barrel form is less than the volume V of the oil hydraulic cylinder oil closed cavity liquid with piston rod and cylinder cap.Because oil hydraulic cylinder of the present invention has only a sealing (plunger primary seal) to contact with liquid, and the oil hydraulic cylinder with piston rod and cylinder cap has 3 sealings (piston primary seal, piston rod primary seal and cylinder cap static seal) to contact with liquid.The distortion of Sealing can reduce comprehensive elastic feel quantity β
eComprehensive elastic feel quantity β in the oil hydraulic cylinder oil closed cavity of the present invention
eBe greater than the comprehensive elastic feel quantity β of oil hydraulic cylinder oil closed cavity liquid with piston rod and cylinder cap
eThese two factors all make the ω of the dynamic performance (sensitivity of response and rapidity) of reflection oil hydraulic cylinder
hIncrease.Therefore, the dynamic performance of oil hydraulic cylinder of the present invention (sensitivity of response and the rapidity) oil hydraulic cylinder that relatively has piston rod and a cylinder cap increases.
Oil hydraulic cylinder of the present invention has works fine performance and permanent working life, can be used as common reciprocating oil hydraulic cylinder, also can be used as servo-controlled oil hydraulic cylinder.Can work steady in a long-term in the higher environment that dust and steam arranged of temperature.
According to this oil hydraulic cylinder of the moving direction that is driven mechanical part can vertically install, level is installed or tilt to install and use.
Can fix by cylinder barrel the plunger frame movement according to motion mode; Also can the plunger frame fixation, the cylinder barrel motion.
Change outer portion connecting structure and can realize various Placements: cylinder barrel bottom-hinged formula; Cylinder barrel flange in the bottom formula; Cylinder barrel head flanges formula; Cylinder barrel middle part gudgeon formula; The cylinder barrel base type.According to the load request that is driven mechanical part, two plungers can be isometrical, also can be reducings.
Claims (1)
1. double-action plunger type reciprocating movement hydraulic cylinder, which comprises at least cylinder barrel, plunger and plunger seal (12), it is characterized in that: cylinder barrel is cylinder barrel up and down, plunger by plunger seal (12) sealing is arranged in cylinder barrel inside up and down, two wing-shaped plates (6) are stretched out in the plunger both sides, and two wing-shaped plates (6) that stretch out both sides are connected with the exterior mechanical parts with connecting plate (1) by framework (3); Cylinder barrel and plunger top and bottom form oil closed cavity up and down up and down, and oil closed cavity has the hydraulic oil manhole appendix up and down; Two wing-shaped plates (6) and plunger that described plunger stretches out are made an integral body; Described plunger is connected as a whole with two wing-shaped plates (6) by link; Described plunger seal (12) comprises two cover primary seals, secondary sealing and dust sealing, and two cover sealings are set in the plunger two ends; A control valve piece is installed on the described cylinder barrel, the servo control element electrohydraulic control is arranged on the control valve piece, epicoele turnover oilhole (A), the cavity of resorption turnover oilhole (B) of the output oil hole of epicoele turnover oilhole (A), cavity of resorption turnover oilhole (B) and the electrohydraulic control of oil hydraulic cylinder directly are communicated with by the control valve piece, form the oil hydraulic circuit of Hydrauservo System proper functioning; Described framework (3) has two arms to be connected on two wing-shaped plates (6) with screw and plunger moves together; Two arms of described framework (3) and two arms of connecting plate (1) are connected with screw and follow plunger and move together; Two cover guide bearings (4) are installed on the arm of described framework (3); The external stability of described oil hydraulic cylinder has displacement transducer (9), and it is parallel with plunger to be contained on another arm of framework (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100177148A CN101260896B (en) | 2008-03-14 | 2008-03-14 | Double-action plunger type reciprocating movement hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100177148A CN101260896B (en) | 2008-03-14 | 2008-03-14 | Double-action plunger type reciprocating movement hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101260896A CN101260896A (en) | 2008-09-10 |
| CN101260896B true CN101260896B (en) | 2010-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100177148A Expired - Fee Related CN101260896B (en) | 2008-03-14 | 2008-03-14 | Double-action plunger type reciprocating movement hydraulic cylinder |
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| CN (1) | CN101260896B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438048A (en) * | 2013-08-28 | 2013-12-11 | 无锡市长江液压缸厂 | Static pressure supporting high-frequency vibration servo hydraulic cylinder |
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- 2008-03-14 CN CN2008100177148A patent/CN101260896B/en not_active Expired - Fee Related
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| CN101260896A (en) | 2008-09-10 |
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Owner name: CHINA NATIONAL HEAVY MACHINERY RESEARCH INSTITUTE Free format text: FORMER NAME: CHINA HEAVY MACHINERY INSTITUTE |
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Address after: 710032 Shaanxi city in Xi'an province Xin Jiamiao Xi'an Heavy Machinery Research Institute Patentee after: CHINA NATIONAL HEAVY MACHINERY RESEARCH INSTITUTE Co.,Ltd. Address before: 710032 Shaanxi city in Xi'an province Xin Jiamiao Xi'an Heavy Machinery Research Institute Patentee before: China National Heavy Machinery Research Institute Co.,Ltd. Address after: 710032 Shaanxi city in Xi'an province Xin Jiamiao Xi'an Heavy Machinery Research Institute Patentee after: China National Heavy Machinery Research Institute Co.,Ltd. Address before: 710032 Shaanxi city in Xi'an province Xin Jiamiao Xi'an Heavy Machinery Research Institute Patentee before: China National Heavy Machinery Research Institute Co.,Ltd. |
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Granted publication date: 20100728 Termination date: 20160314 |
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| CF01 | Termination of patent right due to non-payment of annual fee |