CN106224320A - Inbuilt displacement sensor integrated form list rod symmetrical hydraulic cylinder - Google Patents
Inbuilt displacement sensor integrated form list rod symmetrical hydraulic cylinder Download PDFInfo
- Publication number
- CN106224320A CN106224320A CN201610817463.6A CN201610817463A CN106224320A CN 106224320 A CN106224320 A CN 106224320A CN 201610817463 A CN201610817463 A CN 201610817463A CN 106224320 A CN106224320 A CN 106224320A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- lock chamber
- piston rod
- chamber
- displacement sensor
- Prior art date
Links
- 238000006073 displacement reactions Methods 0.000 title claims abstract description 46
- 239000007788 liquids Substances 0.000 claims abstract description 30
- 239000003570 air Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000007789 gases Substances 0.000 claims description 2
- 239000007787 solids Substances 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims 1
- 239000003921 oils Substances 0.000 description 6
- 239000010720 hydraulic oils Substances 0.000 description 3
- 238000000034 methods Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering processes Methods 0.000 description 1
- 230000002708 enhancing Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001360 synchronised Effects 0.000 description 1
Classifications
-
- 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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- 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
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
-
- 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
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
Abstract
Description
Technical field
The present invention relates to fluid pressure actuator, especially relate to inbuilt displacement sensor integrated form list rod symmetry liquid Cylinder pressure.
Background technology
Hydraulic cylinder is the executive component that hydraulic energy is converted to linear motion mechanical energy.Symmetrical hydraulic cylinder refers to hydraulic cylinder Two acting surface area equation, and asymmetric servo cylinder is due to the reason of rod chamber piston rod, two active areas are unequal, are Asymmetrical cylinder.The flow difference caused due to area difference in asymmetrical cylinder motor process can affect the controlling of hydraulic cylinder Energy.For pump-contrdled cylinder, directly change the rotating speed of pump and turn to movement velocity and the direction of motion controlling hydraulic cylinder, hydraulic pressure System avoids restriction loss, reduces system heat generation, improves system effectiveness.At present about the research ratio of integrated type hydraulic cylinder Relatively limited, integration degree is relatively low is common problem, how motor, oil pump, valve block, pipeline and hydraulic cylinder to be carried out Reasonably space is arranged is matter of utmost importance；And about the research of symmetrical hydraulic cylinder, maximum has a problem in that and cannot suitably arrange Displacement transducer and the spatial relationship of hydraulic cylinder, in order to ensure the service behaviour of symmetrical hydraulic cylinder, can only be by outside displacement transducer Fix outside being placed in cylinder body or by the magnet ring of displacement transducer.Outside the former makes sensor independent of system, resisting of sensor Interference performance and contamination resistance are affected, and whole system is not truly integrated；Although the latter will sense Device is built-in, but sensor main body is with piston rod associated movement, makes system become complicated heavy.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that a kind of inbuilt displacement sensor integrated form list rod Symmetrical hydraulic cylinder, this hydraulic cylinder Highgrade integration, inbuilt displacement sensor, simple in construction, Long travel, hydraulic cylinder two acting surface Effective area is equal, be not required to fuel tank, be applicable to closed circuit.
In order to achieve the above object, the technical solution used in the present invention is:
The inbuilt displacement sensor integrated form list rod symmetrical hydraulic cylinder of the present invention, including a magnetostrictive displacement sensing Device and a hydraulic cylinder, described hydraulic cylinder includes that cylinder body, the main body of described magnetostrictive displacement sensor pass through sealing ring Being fixed on cylinder bottom, described cylinder bottom is fixed on the right-hand member of described cylinder body, has sky on the sidewall of described cylinder body right-hand member Gas entrance, has first liquid passage on described cylinder bottom, has second liquid on the sidewall in the left side of described cylinder body Passage, the lock chamber of a tubular is arranged in cylinder body, is provided with one between described lock chamber outer wall and inboard wall of cylinder block The piston rod of hollow, the right-hand member of described lock chamber is fixed on cylinder bottom and compresses between other end outer wall and piston rod inwall Be provided with sealing ring with seal, the right-hand member at described piston rod is provided with the boss matched with inboard wall of cylinder block shape, described Boss outer wall and inboard wall of cylinder block between can be slidably matched and between the outer wall and inboard wall of cylinder block of described boss press Sealing ring is tightly installed to seal, the left end of described piston rod stretch out the opening on the left of cylinder body outer and be arranged on outside cylinder body Piston end cap be fixedly linked, can be slidably matched between the opening inwall on the left of the left end of described piston rod and described cylinder body And between opening inwall and the outer wall of piston rod on the left of described cylinder body compress be provided with sealing ring with seal, described Lock chamber in magnet ring lock chamber is installed, the left end of described magnet ring lock chamber is fixed on piston end cap, at described magnetic The magnet ring of magnetostrictive displacement sensor, the mangneto of described magnetostrictive displacement sensor it is fixed with on the right-hand member of ring lock chamber Expansion link is inserted in the hollow cavity of magnet ring lock chamber, the holding wire of described magnetostrictive displacement sensor and control system phase Even the displacement signal of digital quantity is exported to control system, structure between described cylinder bottom, lock chamber, piston rod and piston end cap Becoming the first chamber, the first described chamber to be connected with first liquid passage, the liquid in the first chamber described in inflow is being lived Squeezing action face on plug end cap is the first acting surface, constitutes the second chamber between described piston rod and cylinder body, described the Two fluid passages are connected with the second described chamber, the squeezing action on boss of the liquid in the second chamber described in inflow Face is the second acting surface, constitutes air cavity between described cylinder bottom, cylinder body, lock chamber and piston rod, and described air cavity passes through air Entrance is connected with air, and the first described acting surface and the area equation of the second acting surface, described cylinder body length, lock chamber are long The length of degree and piston rod reduces successively, and the length of described piston rod is less than the length of lock chamber, and described magnet ring is fixed The length in chamber is less than the length of piston rod.
The present invention compared with prior art, has the beneficial effect that and combines symmetrical hydraulic cylinder and asymmetric servo cylinder Plurality of advantages, solves in motor process the piston rod both sides work area problem such as not, it is ensured that pass in and out oil mass during hydraulic cylinder Equal, thus stablizing during maintaining hydraulic cylinder works, well solve the contradiction of hydraulic cylinder flow and stability；By magnetic Cause telescopic displacement sensor and be built in inside hydraulic cylinder, enhance the capacity of resisting disturbance of sensor, it is achieved that element integrated.This Structure have Long travel, single rod, hydraulic cylinder two acting surface effective area is equal, inbuilt displacement sensor, maintenance more Easily, it is applicable to the features such as closed circuit, can be widely applied in hydraulic system.
Accompanying drawing explanation
Fig. 1 is the front view of the inbuilt displacement sensor integrated form list rod symmetrical hydraulic cylinder of the present invention.
Detailed description of the invention
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.Following each embodiment is merely to illustrate this Invention and not limitation of the present invention.
As shown in drawings, inbuilt displacement sensor integrated form list rod symmetrical hydraulic cylinder of the present invention, stretch including a mangneto Condense displacement sensor and a hydraulic cylinder, and described hydraulic cylinder includes cylinder body 2, the master of described magnetostrictive displacement sensor 8 Body is fixed on cylinder bottom 1 by sealing ring 10.
Described cylinder bottom 1 is fixed on the right-hand member of described cylinder body 2, has air on the sidewall of described cylinder body 2 right-hand member Entrance T, has first liquid passage A on described cylinder bottom 1, has the second liquid on the sidewall in the left side of described cylinder body 2 Body passage B, the lock chamber 5 of a tubular is arranged in cylinder body 2, installs between described lock chamber 5 outer wall and cylinder body 2 inwall The piston rod 6 of a hollow, the right-hand member of described lock chamber 5 is had to be fixed on cylinder bottom 1 and in other end outer wall and piston rod 6 Between wall compress be provided with sealing ring with seal, the right-hand member at described piston rod 6 is provided with and matches with cylinder body 2 inner wall shape Boss, can be slidably matched between outer wall and cylinder body 2 inwall of described boss and at the outer wall of described boss and cylinder Compressing between body 2 inwall and be provided with sealing ring to seal, the left end of described piston rod 6 stretches out outside the opening on the left of cylinder body 2 also And be fixedly linked with the piston end cap 7 being arranged on outside cylinder body 2, opening on the left of the left end of described piston rod 6 and described cylinder body Can be slidably matched between mouthful inwall and compress between opening inwall and the outer wall of piston rod 6 on the left of described cylinder body and install Having sealing ring to seal, be provided with magnet ring lock chamber 4 in described lock chamber 5, the left end of described magnet ring lock chamber 4 is fixed On piston end cap 7, the right-hand member of described magnet ring lock chamber 4 is fixed with the magnet ring 3 of magnetostrictive displacement sensor 8.Institute The magnetostrictive bar of the magnetostrictive displacement sensor 8 stated is inserted in the hollow cavity of magnet ring lock chamber 4, described magnetostriction The holding wire of displacement transducer is connected with control system to export the displacement signal of digital quantity to control system.In figure, 9 is magnetic Cause the housing of telescopic displacement sensor 8, be fixed on cylinder bottom.
The first chamber a, the first described chamber is constituted between described cylinder bottom 1, lock chamber 5, piston rod 6 and piston end cap 7 Room a is connected with first liquid passage A, and the first described chamber indoor liquid, through fluid passage A and outside oil communication, flows into institute The liquid in the first chamber a stated squeezing action face on piston end cap 7 is the first acting surface I；Piston rod 6 and cylinder body 2 it Between constitute the second chamber b, described second liquid passage B and be connected with the second described chamber b, liquid warp in the second chamber b Fluid passage B and outside oil communication, the squeezing action face on boss of the liquid in the second chamber b described in inflow is second Acting surface II；Between cylinder bottom 1, cylinder body 2, lock chamber 5 and piston rod 6 constitute air cavity t, described air cavity t by air intake T with Air is connected.The first described acting surface I and area equation of the second acting surface II.
The length of described cylinder body 2 length, lock chamber 5 length and piston rod 6 reduces successively, and the length of piston rod 6 needs Being less than the length of lock chamber 5, during to ensure that piston rod 6 is fully retracted, the boss rightmost side of piston rod 6 is positioned at air intake T Left side.In like manner, the length of described magnet ring lock chamber 4 is also required to the length less than piston rod 6, complete to ensure piston rod 6 When stretching out, it is ensured that in the case of magnetostrictive displacement sensor 8 normally works, the boss leftmost side of piston rod 6 is positioned at the second liquid The right side of body passage B.
The magnet ring 3 of magnetostrictive displacement sensor connects firmly with magnet ring lock chamber 4 bolt, thus ensures that piston rod 6 is moved through Cheng Zhong, the magnetostrictive bar position of magnetostrictive displacement sensor fixes, and magnet ring 3 crosses that magnet ring lock chamber 4 is Tong Bu with piston rod 6 to be transported Dynamic.Preferably the resolution of magnetostrictive displacement sensor is 0.001mm, exhausted with 25 Gray code digital output piston rods To position.The absolute position values of described magnetostrictive displacement sensor output piston bar, it is also possible to the speed of output piston bar, Reliability is good, and stability is strong；Metering system is contactless, it is not necessary to consider the interference factors such as friction, abrasion；There is not signal The measurement error such as drift, do not affect data receiver under powering-off state.
Operation principle of the present invention is as follows:
Hydraulic cylinder has and only an actuating rod, i.e. piston rod 6, and two acting surfaces of hydraulic cylinder are respectively the first acting surface I and second acting surface II, appropriate design cylinder diameter so that the area equation of two acting surfaces, to realize the control of asymmetric cylinder Performance.Lock chamber 5 diameter will not directly affect hydraulic cylinder active area, therefore, and can be by straight for lock chamber 5 in design process Footpath suitably increases, and has the most both ensured the stability of hydraulic cylinder, and will not improve again flow required during hydraulic cylinder works.
During work, air intake T leads to air, and during piston rod 6 stretches out, first liquid passage A oil-feed, through cylinder bottom 1 oil Road flows into the first chamber a, acts on the first acting surface I, and to promote piston rod 6 to stretch out, passage B is fuel-displaced for second liquid, and second The hydraulic oil of chamber b second liquid passage B on cylinder body 2 flows out；During piston rod 6 is regained, second liquid passage B oil-feed, Hydraulic oil second liquid passage B on cylinder body 2 enters the second chamber b, acts on and promotes piston rod 6 to regain on face II, the first liquid Passage A is fuel-displaced for body, and the hydraulic oil of the first chamber a, through cylinder bottom 1 oil circuit, is discharged from first liquid passage A.
The magnetostrictive bar of the built-in magnetostrictive displacement sensor of hydraulic cylinder 8, be arranged on cylinder bottom 1, the piston rod 6 of hollow, Lock chamber 5 and the inside of magnet ring lock chamber 4, compact conformation.During hydraulic cylinder works, magnetostrictive displacement sensor 8 Magnet ring 3 connects firmly on the piston rod, is synchronized with the movement with piston rod 6, and the main body of magnetostrictive displacement sensor 8 is solid by sealing ring 13 It is scheduled on cylinder bottom 1, the displacement of real-time accurate feedback piston rod 6.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610817463.6A CN106224320A (en) | 2016-09-12 | 2016-09-12 | Inbuilt displacement sensor integrated form list rod symmetrical hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610817463.6A CN106224320A (en) | 2016-09-12 | 2016-09-12 | Inbuilt displacement sensor integrated form list rod symmetrical hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106224320A true CN106224320A (en) | 2016-12-14 |
Family
ID=58073968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610817463.6A CN106224320A (en) | 2016-09-12 | 2016-09-12 | Inbuilt displacement sensor integrated form list rod symmetrical hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106224320A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939910A (en) * | 2017-04-22 | 2017-07-11 | 新乡市新倍增自动化设备有限公司 | A kind of Electrical hydrostatic actuator single rod symmetrical hydraulic cylinder at a high speed |
| CN108223488A (en) * | 2016-12-21 | 2018-06-29 | 精工电子有限公司 | Fluid pressure cylinder |
| CN109058219A (en) * | 2018-08-30 | 2018-12-21 | 哈尔滨工业大学 | A kind of built-in sensors formula hydraulic cylinder device |
| CN110307207A (en) * | 2019-06-25 | 2019-10-08 | 同济大学 | A kind of hydraulic cylinder displacement sensor cooling flow control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3949650A (en) * | 1975-01-16 | 1976-04-13 | Blatt Leland F | Equal area displacement hydraulic cylinder |
| CN2539019Y (en) * | 2002-04-26 | 2003-03-05 | 无锡市长江液压缸厂 | High-pressure heavy hydraulic cylinder with linear displacement sensor |
| CN1546873A (en) * | 2003-11-29 | 2004-11-17 | 浙江大学 | Single rod double acting symmetrical hydraulic cylinder with built-in displacement sensor |
| CN1584350A (en) * | 2004-06-04 | 2005-02-23 | 浙江大学 | Single rod and rough symmetric double actuating surfaces hydraulic cylinder with internal displacement sensor |
| CN2903517Y (en) * | 2006-04-28 | 2007-05-23 | 韶关液压件厂有限公司 | Unconventional hydraulic cylinder displacement sensor |
| CN101089406A (en) * | 2006-06-16 | 2007-12-19 | 萱场工业株式会社 | Fluid pressure cylinder unit with stroke sensor |
| CN101243259A (en) * | 2005-09-09 | 2008-08-13 | 萱场工业株式会社 | Cylinder device |
| CN201714733U (en) * | 2010-06-25 | 2011-01-19 | 格力乐液压系统(常州)有限公司 | Servo hydraulic oil cylinder |
| CN103016447A (en) * | 2013-01-15 | 2013-04-03 | 无锡市三信传动控制有限公司 | Constant-pressure and constant-force hydraulic servo cylinder with single outlet rod |
| CN103775441A (en) * | 2014-01-26 | 2014-05-07 | 天津大学 | Electrical feedback large-scale servo hydraulic cylinder driven by double motors |
| CN104047912A (en) * | 2014-06-25 | 2014-09-17 | 天津大学 | Digital pump control differential motion hydraulic cylinder with power source |
-
2016
- 2016-09-12 CN CN201610817463.6A patent/CN106224320A/en not_active Application Discontinuation
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3949650A (en) * | 1975-01-16 | 1976-04-13 | Blatt Leland F | Equal area displacement hydraulic cylinder |
| CN2539019Y (en) * | 2002-04-26 | 2003-03-05 | 无锡市长江液压缸厂 | High-pressure heavy hydraulic cylinder with linear displacement sensor |
| CN1546873A (en) * | 2003-11-29 | 2004-11-17 | 浙江大学 | Single rod double acting symmetrical hydraulic cylinder with built-in displacement sensor |
| CN1584350A (en) * | 2004-06-04 | 2005-02-23 | 浙江大学 | Single rod and rough symmetric double actuating surfaces hydraulic cylinder with internal displacement sensor |
| CN101243259A (en) * | 2005-09-09 | 2008-08-13 | 萱场工业株式会社 | Cylinder device |
| CN2903517Y (en) * | 2006-04-28 | 2007-05-23 | 韶关液压件厂有限公司 | Unconventional hydraulic cylinder displacement sensor |
| CN101089406A (en) * | 2006-06-16 | 2007-12-19 | 萱场工业株式会社 | Fluid pressure cylinder unit with stroke sensor |
| CN201714733U (en) * | 2010-06-25 | 2011-01-19 | 格力乐液压系统(常州)有限公司 | Servo hydraulic oil cylinder |
| CN103016447A (en) * | 2013-01-15 | 2013-04-03 | 无锡市三信传动控制有限公司 | Constant-pressure and constant-force hydraulic servo cylinder with single outlet rod |
| CN103775441A (en) * | 2014-01-26 | 2014-05-07 | 天津大学 | Electrical feedback large-scale servo hydraulic cylinder driven by double motors |
| CN104047912A (en) * | 2014-06-25 | 2014-09-17 | 天津大学 | Digital pump control differential motion hydraulic cylinder with power source |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108223488A (en) * | 2016-12-21 | 2018-06-29 | 精工电子有限公司 | Fluid pressure cylinder |
| CN108223488B (en) * | 2016-12-21 | 2020-09-18 | 精工电子有限公司 | Fluid pressure cylinder |
| CN106939910A (en) * | 2017-04-22 | 2017-07-11 | 新乡市新倍增自动化设备有限公司 | A kind of Electrical hydrostatic actuator single rod symmetrical hydraulic cylinder at a high speed |
| CN109058219A (en) * | 2018-08-30 | 2018-12-21 | 哈尔滨工业大学 | A kind of built-in sensors formula hydraulic cylinder device |
| CN110307207A (en) * | 2019-06-25 | 2019-10-08 | 同济大学 | A kind of hydraulic cylinder displacement sensor cooling flow control device |
| CN110307207B (en) * | 2019-06-25 | 2020-07-07 | 同济大学 | Cooling flow control device of hydraulic cylinder displacement sensor |
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Application publication date: 20161214 |
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| WD01 | Invention patent application deemed withdrawn after publication |