CN107091255A - A kind of side valve type asymmetric cylinder bidirectional hydraulic balance system - Google Patents
A kind of side valve type asymmetric cylinder bidirectional hydraulic balance system Download PDFInfo
- Publication number
- CN107091255A CN107091255A CN201710023550.9A CN201710023550A CN107091255A CN 107091255 A CN107091255 A CN 107091255A CN 201710023550 A CN201710023550 A CN 201710023550A CN 107091255 A CN107091255 A CN 107091255A
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- Prior art keywords
- valve
- oil
- balanced
- hydraulic
- cylinder
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
-
- 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
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting output members
- F15B2211/7054—Having equal piston areas
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/76—Control of force or torque of the output member
- F15B2211/761—Control of a negative load, i.e. of a load generating hydraulic energy
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of side valve type asymmetric cylinder bidirectional hydraulic balance system, and based on this balanced valve, suitable for the hydraulic balance system of the double acting asymmetric cylinder with loading condition, it is intended to solve the influence of the loading condition that is likely to occur in hydraulic control system to hydraulic system.It includes a kind of balanced valve of the spool valve core type specially designed, and balanced valve is by valve body, valve core of the spool valve, and oil duct etc. is constituted and can used in pairs, and the load being likely to occur to both direction is all effective, the function with bidirectional locking, or oil-tank floating function.Restriction loss very little of this new hydraulic balance system when load does not occur.Balanced valve and balance system that the present invention is designed, structure are very simple, and cost of manufacture is very low, good reliability, insensitive to oil liquid temperature and cleannes, and the balance quality and security of system of hydraulic control system can be effectively ensured.
Description
Technical field
The invention belongs to hydraulic control component and system regions, it is related to a kind of hydraulically balanced valve of spool valve core type and double
To hydraulic balance system, more precisely, it is related to a kind of spool valve core type hydraulically balanced valve specially designed, and based on this
Balanced valve, it is adaptable to which the hydraulic balance system of loading condition occurs in both direction for double acting asymmetric cylinder.
Technical background
Hydraulic technique is using a kind of transmission widely and control technology in modern industrial technology, with power density
Many advantages, such as height, faster system response.And in actual applications, often there is so-called " load " in system, that is, by bearing
The active force of load promotes the motion of hydraulic jack (or motor).For example, during oil cylinder upwards rises weight, oil cylinder is in oil
Overcome load gravity to move upwards under pressure effect, load effect direction and cylinder movement it is in opposite direction this be normal load, typically
System can even running.But when oil cylinder is declining under loading Action of Gravity Field from eminence, the direction of motion and load weight of oil cylinder
The direction of power is identical, will now produce load.Now, to allow hydraulic system even running, it is typically necessary using balance
Valve, produces certain back pressure, or pass through other throttle grverning forms so that oil cylinder can be steadily descending in systems.Work as needs
It is just very high to the performance requirement of balanced valve when accurately controlling position or the speed of hydraulic system under loading condition, a lot
In the case of it is difficult to ensure that system control accuracy and stationarity.Once being added in system after back pressure, even in not having
When load occurs, throttling is still suffered from, resulting restriction loss is also larger.
Patent of the present invention proposes a kind of side valve type asymmetric cylinder bidirectional hydraulic balance system, it is intended to solve hydraulic control system
In the influence of the loading condition that is likely to occur to hydraulic system, and can use in pairs, what both direction was likely to occur is negative
All effective, the function with bidirectional locking is carried, and is not bearing restriction loss very little when load occurs.The cunning that the present invention is designed
Valve core formula balanced valve and balance system, structure are very simple, and cost of manufacture is very low, good reliability, to oil liquid temperature and cleaning
Degree is insensitive, and the balance quality and security of system of hydraulic control system can be effectively ensured.
The content of the invention
The present invention proposes a kind of side valve type asymmetric cylinder bidirectional hydraulic balance system, and its target is to realize hydraulic system each
Equal energy even running under loading condition is planted to lock with reliable.
In order to realize above-mentioned technical characterstic, the present invention is adopted the following technical scheme that：Balance system proposed by the present invention is based on
A kind of balanced valve of newly-designed spool valve core type, balanced valve is by valve body, valve core of the spool valve, the composition such as oil duct.
Valve opening is provided with described valve body, valve inner there are three oil ducts to link up outside valve opening and balanced valve.Two of which
Oil duct is provided with undercut groove at valve opening inwall.
Described valve core of the spool valve is designed to be formed by two piston in combination, in valve element upper piston, is provided with four oil ducts,
It is uniformly distributed circumferentially, the intermediate cavity for linking up hydraulic fluid port and two piston seals at the top of balanced valve；
The distance between lower edge of two pistons of the balance valve core, and in valve body；The lower edge of two undercut grooves it
Between distance it is exactly the same.When valve element is slided up and down in valve opening, the restriction of two synchronizations is constituted, the two restrictions are total
It is with identical aperture；
Described valve core of the spool valve can regard different need in the weaker end spring of both ends or one end installation, when valve element bottom
When hydraulic fluid pressure overcomes top oil pressure and spring force enough, valve element will be moved up.Vice versa；
Described bidirectional hydraulic balance system, by a pair of side valve type balanced valves, is constituted by specific connected mode.Two are put down
The top hydraulic fluid port of weighing apparatus valve connect with two chambers of oil cylinder respectively, and the bottom hydraulic fluid port of two balanced valves, respectively with pressure oil duct and time
Oil duct is connected；
Described bidirectional hydraulic balance system, the flow of system is entered by adjusting, you can the position of accurate control cylinder
And speed, whichever direction has load to occur, can ensure the hydraulic balance function of system, make system stable operation.
The present invention advantage be：
1, designed spool valve core type balancing valve structure is simple, and cost is low, and mounting means is also very convenient, and fluid is cleaned
Degree and temperature change require also not high；
2, the hydraulic balance system designed based on this balanced valve, using very flexible.In pairs in use, can ensure double
Go out that loading condition occurs in whichever direction of rod oil cylinder, can stable operation；
3, balanced valve is stable and reliable in work, and the realization of equilibrium function ensures valve port opening by maching dimension, from
And ensure that the flow of turnover oil cylinder is identical, thus hardly influenceed by other extraneous disturbing factors；
4, compared with traditional balanced valve based on overflow-type, spool valve core type balanced valve occurs without loading condition
When, the pressure loss of excessively stream is very small, and almost without the pressure loss, larger pressure is only just produced when there is loading condition
Drop, thus with very high energy utilization efficiency.
Brief description of the drawings
Fig. 1 is the structural representation (side valve type hydraulically balanced valve) of spool valve core type balanced valve proposed by the present invention,
Fig. 2 for based on this balanced valve it is double go out rod oil cylinder hydraulic balance system schematic diagram (the side valve type liquid of asymmetric cylinder
Flatten balance system).
Embodiment
Illustrate the design concept of the present invention below by schematic diagram.
It is the structural representation of side valve type balanced valve as shown in Figure 1, is mainly made up of valve body and valve element and connection oil duct.1
Position top hydraulic fluid port, 2 be end spring, and 3 be valve body, and 4 be the internal galleries in piston, and 5 be upper undercut groove.6 be side valve type valve element,
It is designed to be formed by connecting (upper piston 13 and lower piston 9) by two sections of pistons, the valve opening of valve element 6 and valve inner coordinates, can
Slided in valve opening, but prevent flowing of the hydraulic oil along fit clearance.The two ends of valve element 6 can install weaker end as needed
Spring 2, spring also can be individually arranged at one end.7 be lower undercut groove, and 8 be bottom hydraulic fluid port, and 9 be the lower piston of valve element, under 10 are
Portion's oil duct, is connected with lower undercut groove 7；11 intermediate cavities, 12 be middle oil duct, is connected with upper undercut groove 5；13 be the top of valve element 6
Piston, 14 be top oil duct.Between the distance between lower edge of two undercut grooves and the lower edge of two pistons on valve element
Apart from identical.
Be illustrated in figure 2 based on spool valve core type balanced valve it is double go out rod oil cylinder balance system schematic diagram.When left balance
When valve bottom hydraulic fluid port connects pressure oil, pressure oil overcomes hydraulic coupling at the top of valve element in the thrust that left balance valve core bottom is produced, and pushes away
Movable valve plug is lifted up.When valve element is raised to certain altitude, two undercut grooves for being balanced valve core covering will be by gradually
Open.Now, the pressure oil of bottom hydraulic fluid port enters right balanced valve by by the lower undercut groove and bottom oil duct of left balanced valve
Top hydraulic fluid port.Simultaneously as the upper undercut groove of left balanced valve synchronous with lower undercut groove can be opened, and therefore, the top of left balanced valve
Hydraulic fluid port, can also be connected by the internal galleries in upper piston through upper undercut groove with middle oil duct.Oil at the top of into right balanced valve
The pressure oil of mouth presses to right balance valve core the bottommost of valve opening, so that the bottom oil duct of right balanced valve and middle oil duct is equal
Close.Pressure oil enters the right side of oil cylinder, promotes oil cylinder lateral movement to the left.Now, due to left balanced valve top oil duct by
Close, the internal galleries that the hydraulic oil of oil cylinder left chamber can only be in the upper piston through left balanced valve, into the centre of left balanced valve
Chamber, then the upper undercut groove through left balanced valve and middle oil duct oil return box.
Obviously, during oil cylinder is promoted to left movement, in the case of ignoring interior leakage, into the pressure of right cavity of cylinder
Oil is exactly the excessively stream flow of the torus knot head piece at the lower undercut groove by left balanced valve, and the liquid of fuel tank is flowed back on the left of oil cylinder
Force feed, then be the inflow-rate of water turbine of the torus knot head piece at the upper undercut groove by same balanced valve.Due to the two ring-shaped throttlings
The aperture of mouth is always consistent, when pressure difference is identical, and it is strict equal that inflow-rate of water turbine, which is also,.Therefore, two are mechanically ensured
The aperture of individual restriction is exactly the same, thus ensure that the chamber of oil cylinder two to enter oil pump capacity identical.
Similarly, when right balanced valve bottom connects pressure oil, promotes oil cylinder lateral movement to the right, its course of work and above-mentioned mistake
Journey all fours, simply now the valve element of right balanced valve is pushed to top, and the valve element of left balanced valve is crushed on bottom.Now,
The torus knot head piece then matched completely by two in right balanced valve into the flow of the chamber of oil cylinder two is controlled, the two restrictions
Aperture is similarly to ensure synchronous by mechanical system.
When no loading condition occurs, the aperture of annular restriction is determined by required flow in balanced valve, oil
The pressure cavity pressure of cylinder differs very little with charge oil pressure, and oil cylinder back oil cavity pressure is also close to tank pressure, therefore whole system
Pressure loss very little.When there is loading condition, for example, oil cylinder is in low order end, it is necessary to left movement, and load effect is in oil
Power is also for from right to left on cylinder, as loading condition.Now, the pressure oil of left balanced valve bottom is still by left balanced valve
Lower undercut groove at torus knot head piece, the top hydraulic fluid port through right balanced valve enters right cavity of cylinder, the hydraulic oil of oil cylinder left chamber
It is still the torus knot head piece oil return box at the upper undercut groove by left balanced valve.Unlike, the now pressure of right cavity of cylinder
It is relatively low, a little higher than tank pressure, and the pressure of oil cylinder left chamber is higher, the slightly less than pressure that a little higher than load effect is produced, fuel feeding
Pressure.Now, the aperture of two torus knot head pieces is still identical, and the pressure difference of excessively stream is larger, when two restrictions pressure difference still
So it is identical, therefore excessively stream flow remain on it is identical.It is possible thereby to ensure even running of the oil cylinder under loading condition.Now,
The position of oil cylinder and speed are still accurately controlled by fuel supply flow rate, simply now because the pressure difference of restriction is larger, can be produced
Certain energy loss.To the hydraulic balance system with loading condition, energy loss is usually nothing caused by this throttling
What method was avoided.When negative load appears in another direction of motion, the working mechanism of balance system is identical.
When end spring being housed at the top of valve core of the spool valve, in not outside fuel feeding, the valve element of two balanced valves is in
The bottom of valve opening, now, the oil duct of oil cylinder both sides oil return box are closed, thus in locking state.But because guiding valve has one
Fixed interior leakage, thus the locking time will not be oversize.If balanced valve only valve element bottom is mounted with end spring, no outside
During fuel feeding, valve element is in close valve opening tip position, then the chamber of oil cylinder two connects fuel tank, and oil cylinder is in quick condition.
Technical scheme is not limited to the limitation of above-mentioned specific embodiment, and every technique according to the invention scheme is made
The technology deformation gone out, each falls within protection scope of the present invention.
Claims (5)
1. a kind of side valve type asymmetric cylinder bidirectional hydraulic balance system, is mainly matched somebody with somebody in pairs by the spool valve core type balanced valve specially designed
Set is combined, it is characterised in that：
The balanced valve specially designed is mainly made up of valve body and valve element and connection oil duct, and side valve type spool design is into by two sections of pistons
It is formed by connecting, valve element two ends can install weaker end spring as needed, the locking of oil cylinder or floating when realizing holding state
It is dynamic, be provided with three oil ducts in valve body, the oil duct of bottom two is provided with undercut groove in valve opening inwall intersection, two undercut grooves it is following
The distance between edge is identical with the distance between lower edge of two pistons on valve element, when valve element is slided in valve opening, and two
Two torus knot head pieces are formed at individual undercut groove, the aperture of the two torus knot head pieces is exactly the same, so as to realize turnover oil cylinder
Hydraulic fluid flow rate it is exactly the same.
2. the aperture of the family of two restrictions according to claim 1 is synchronous, by mechanical system strict guarantee.Valve core of the spool valve
In the distance between two piston lower edges, and the distance between two undercut groove lower edges in valve body are designed to be processed into
It is exactly the same.
3. balanced valve according to claim 1, during balance system applied to asymmetric cylinder, by two identical balances
Valve is used in pairs, and a balanced valve bottom oil duct is connected with the top oil duct of another balanced valve, the middle oil of two balanced valves
Road connects fuel tank.
4. valve element two ends according to claim 1 can install end spring as needed, in not outside fuel feeding, realize
The locking state of oil cylinder or in quick condition.
5. balanced valve according to claim 1, the oil mass of system is balanced by regulation, you can the position of accurate hydraulic cylinder
Put or speed, regardless of whether there is loading condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710023550.9A CN107091255A (en) | 2017-01-07 | 2017-01-07 | A kind of side valve type asymmetric cylinder bidirectional hydraulic balance system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710023550.9A CN107091255A (en) | 2017-01-07 | 2017-01-07 | A kind of side valve type asymmetric cylinder bidirectional hydraulic balance system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107091255A true CN107091255A (en) | 2017-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710023550.9A Pending CN107091255A (en) | 2017-01-07 | 2017-01-07 | A kind of side valve type asymmetric cylinder bidirectional hydraulic balance system |
Country Status (1)
| Country | Link |
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| CN (1) | CN107091255A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605826A (en) * | 2017-10-16 | 2018-01-19 | 杭州诺祥科技有限公司 | Spool valve core type balanced valve treadmill driving control system |
| CN108397437A (en) * | 2018-05-10 | 2018-08-14 | 安徽江淮汽车集团股份有限公司 | A kind of solenoid valve and cylinder control assembly |
| CN108661964A (en) * | 2018-06-29 | 2018-10-16 | 杭州诺祥科技有限公司 | A kind of side valve type asymmetric cylinder bidirectional hydraulic balance system |
| CN109050657A (en) * | 2018-09-18 | 2018-12-21 | 杭州诺祥科技有限公司 | A kind of matched flow control hydraulic steering system |
| CN109268328A (en) * | 2018-11-30 | 2019-01-25 | 杭州诺祥科技有限公司 | Asymmetric bidirectional hydraulic balance locking system |
| CN109356897A (en) * | 2018-11-30 | 2019-02-19 | 杭州诺祥科技有限公司 | Flow matching type balance and energy recovery system |
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| US4150686A (en) * | 1976-11-15 | 1979-04-24 | Textron Inc. | Electrohydraulic control module |
| US4930403A (en) * | 1989-01-13 | 1990-06-05 | Royce Husted | Directionally controlled hydraulic cylinder |
| CN101639133A (en) * | 2009-09-09 | 2010-02-03 | 四川神坤装备股份有限公司 | Automatic balancing valve |
| CN102588365A (en) * | 2012-03-13 | 2012-07-18 | 徐州重型机械有限公司 | Double-cylinder synchronous control hydraulic system and engineering machinery |
| CN202579416U (en) * | 2012-06-05 | 2012-12-05 | 济宁力科液压有限责任公司 | Two-way balancing valve for hydraulic motor |
| CN202833388U (en) * | 2012-10-15 | 2013-03-27 | 常德中联重科液压有限公司 | Load balancing valve and hydraulic load-bearing system |
| CN103291976A (en) * | 2013-07-01 | 2013-09-11 | 江苏鼎晟液压有限公司 | Energy-saving rotary two-way balancing valve |
| CN103398037A (en) * | 2013-08-08 | 2013-11-20 | 常德中联重科液压有限公司 | Load control balance valve and load control hydraulic system |
| CN204755443U (en) * | 2015-06-01 | 2015-11-11 | 泸州国邦机械有限公司 | Bidirectional balance valve |
-
2017
- 2017-01-07 CN CN201710023550.9A patent/CN107091255A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4150686A (en) * | 1976-11-15 | 1979-04-24 | Textron Inc. | Electrohydraulic control module |
| US4930403A (en) * | 1989-01-13 | 1990-06-05 | Royce Husted | Directionally controlled hydraulic cylinder |
| CN101639133A (en) * | 2009-09-09 | 2010-02-03 | 四川神坤装备股份有限公司 | Automatic balancing valve |
| CN102588365A (en) * | 2012-03-13 | 2012-07-18 | 徐州重型机械有限公司 | Double-cylinder synchronous control hydraulic system and engineering machinery |
| CN202579416U (en) * | 2012-06-05 | 2012-12-05 | 济宁力科液压有限责任公司 | Two-way balancing valve for hydraulic motor |
| CN202833388U (en) * | 2012-10-15 | 2013-03-27 | 常德中联重科液压有限公司 | Load balancing valve and hydraulic load-bearing system |
| CN103291976A (en) * | 2013-07-01 | 2013-09-11 | 江苏鼎晟液压有限公司 | Energy-saving rotary two-way balancing valve |
| CN103398037A (en) * | 2013-08-08 | 2013-11-20 | 常德中联重科液压有限公司 | Load control balance valve and load control hydraulic system |
| CN204755443U (en) * | 2015-06-01 | 2015-11-11 | 泸州国邦机械有限公司 | Bidirectional balance valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605826A (en) * | 2017-10-16 | 2018-01-19 | 杭州诺祥科技有限公司 | Spool valve core type balanced valve treadmill driving control system |
| CN108397437A (en) * | 2018-05-10 | 2018-08-14 | 安徽江淮汽车集团股份有限公司 | A kind of solenoid valve and cylinder control assembly |
| CN108661964A (en) * | 2018-06-29 | 2018-10-16 | 杭州诺祥科技有限公司 | A kind of side valve type asymmetric cylinder bidirectional hydraulic balance system |
| CN109050657A (en) * | 2018-09-18 | 2018-12-21 | 杭州诺祥科技有限公司 | A kind of matched flow control hydraulic steering system |
| CN109268328A (en) * | 2018-11-30 | 2019-01-25 | 杭州诺祥科技有限公司 | Asymmetric bidirectional hydraulic balance locking system |
| CN109356897A (en) * | 2018-11-30 | 2019-02-19 | 杭州诺祥科技有限公司 | Flow matching type balance and energy recovery system |
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Application publication date: 20170825 |
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