CN104632735A - Telescopic control system and method for support oil cylinders and mechanical equipment - Google Patents
Telescopic control system and method for support oil cylinders and mechanical equipment Download PDFInfo
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- CN104632735A CN104632735A CN201410752205.5A CN201410752205A CN104632735A CN 104632735 A CN104632735 A CN 104632735A CN 201410752205 A CN201410752205 A CN 201410752205A CN 104632735 A CN104632735 A CN 104632735A
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- oil cylinder
- support oil
- vertical support
- flow control
- control valve
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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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)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a telescopic control system and method for support oil cylinders and mechanical equipment. The telescopic control system comprises the multiple vertical support oil cylinders. The vertical support oil cylinders (1a) comprise the first vertical support oil cylinders and the second vertical support oil cylinders with the telescopic action start speed lower than that of the first vertical support oil cylinders. Rod end chambers of the vertical support oil cylinders (1a) are connected with first work oil ways (2) respectively, non-rod chambers of the vertical support oil cylinders (1a) are connected with second work oil ways (3) respectively, and the first work oil ways (2) and the second work oil ways (3) of the vertical support oil cylinders (1a) are connected to a shared hydraulic oil supply element through corresponding reversing control valves. At least the first work oil ways (2) of the first vertical support oil cylinders or the second work oil ways (3) are provided with flow control valves, and the hydraulic oil conveying resistance of the first vertical support oil cylinders is adjusted through flow control over the flow control valves.
Description
Technical field
The present invention relates to the hydraulic control system of machinery, particularly, relate to a kind of telescopic control system of support oil cylinder.On this basis, the invention still further relates to the machinery of the telescopic control system with described support oil cylinder.In addition, the invention still further relates to a kind of telescopic control method of support oil cylinder of engineering machinery.
Background technique
For ensureing some large-tonnage engineering vehicle (such as hoist, high lifting kind fire-fighting truck etc.) and other machinery (such as concrete ground pump) operation with security and stability, need telescopic leg to be installed on its chassis to carry out supplemental support to this project vehicle.
Telescopic leg is driven by support oil cylinder usually.Be illustrated in figure 1 a kind of telescopic control system of support oil cylinder, comprise multiple support oil cylinders 1 with vertical support oil cylinder 1a and horizontal support legs oil cylinder 1b, support oil cylinder 1 described in each is connected to the first working oil path 2 and the second working oil path 3, with the oil-feed of the rod chamber and rodless cavity that are respectively used to support oil cylinder 1 and oil return.
In diagram telescopic control system, Hydraulic power units comprises main oil pump 7 and emergencypump 8, the two all can from fuel tank 11 oil suction and to the oil inlet P pumps hydraulic oil of support leg valve group 13, and shunk to drive supporting leg by the first working oil path 2 of being connected to the first actuator port A rod chamber fuel feeding to support oil cylinder 1, meanwhile, the hydraulic oil in rodless cavity is by oil return inlet T oil return; Or stretched out to drive supporting leg by the second working oil path 3 of being connected to the second actuator port B rodless cavity fuel feeding to support oil cylinder 1, meanwhile, the hydraulic oil in rod chamber is by oil return inlet T oil return.The one-way valve 12 be arranged on the oil feeding line of main oil pump 7 and emergencypump 8 can avoid influencing each other of the two.
In landing leg stretching process, the resistance making to act on multiple supporting leg and support oil cylinder 1 due to factors such as manufacture, uses is different, and the action moment of each supporting leg and movement speed can be variant.Particularly when main oil pump 7 breaks down, need to adopt emergencypump 8 fuel feeding to stretch to drive support oil cylinder 1.Because the discharge capacity of emergencypump 8 is usually less, the flow of its pumping is difficult to the needs meeting all support oil cylinders 1 at short notice, the first action of the support oil cylinder that resistance will be made less, the support oil cylinder action that resistance could be driven larger after pressure raises.If now machinery is on the ground of inclination, after the little support oil cylinder of resistance shrinks, machinery cannot keep stable, and the security incident such as therefore may to tumble.
In view of this, be necessary the telescopic control system that a kind of support oil cylinder is provided, to solve above-mentioned prior art Problems existing.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of telescopic control system of support oil cylinder, and this telescopic control system effectively can shorten the time difference of the action moment with different resistance support oil cylinder, to reduce the possibility that machinery is tumbled.
To achieve these goals, the invention provides a kind of telescopic control system of support oil cylinder, comprise multiple vertical support oil cylinder, described multiple vertical support oil cylinder comprises the second vertical support oil cylinder that the first vertical support oil cylinder and expanding-contracting action toggle speed are slower than the described first vertical support oil cylinder, described in each, the rod chamber of vertical support oil cylinder is connected to the first working oil path, described in each, the rodless cavity of vertical support oil cylinder is connected to the second working oil path, described first working oil path and second working oil path of vertical support oil cylinder described in each are connected to shared hydraulic pressure fuel feeding element via each self-corresponding reversing control valve, wherein, described first working oil path of at least described first vertical support oil cylinder or described second working oil path are provided with flow control valve, the hydraulic oil transporting resistance of the described first vertical support oil cylinder is regulated with the flow control by this flow control valve.
Preferably, described flow control valve is be arranged on the series flow control valve in described first working oil path, or described flow control valve is be arranged on the throttle valve in described second working oil path.
Preferably, described second working oil path of vertical support oil cylinder described in each is provided with described flow control valve; Or described first working oil path of vertical support oil cylinder is provided with described flow control valve described in each.
Preferably, described first working oil path at described flow control valve place or described second working oil path are provided with switching valve, can pass through the switching of this switching valve, optionally hydraulic control is oily by described flow control valve flow.
Preferably, described flow control valve is integrated in described switching valve; Or described switching valve can switch to connected state and blocking state, described flow control valve is in parallel with described switching valve, can be flowed by described flow control valve or described switching valve by hydraulic control oil by the switching of described switching valve.
Preferably, described telescopic control system comprises main oil pump and emergencypump, and in described emergencypump pumps hydraulic oil with under the state driving described vertical support oil cylinder contraction, described switching valve switches to and makes hydraulic oil by described flow control valve flow.
Preferably, described switching valve is pilot operated directional control valve, and the control mouth of this pilot operated directional control valve is communicated in the force feed mouth of described emergencypump by hydraulic control oil circuit.
Preferably, described switching valve is electric control reversing valve, described telescopic control system comprises the controller for controlling described emergencypump start and stop, and after described emergencypump starts, described controller controls described switching valve and switches to and make hydraulic oil by described flow control valve flow.
In addition, the present invention also provides a kind of machinery, comprises the telescopic outrigger driven by support oil cylinder, and described machinery also comprises the telescopic control system of described support oil cylinder provided by the invention.
In addition, the present invention also provides a kind of telescopic control method of support oil cylinder of engineering machinery, described engineering machinery comprises multiple vertical support oil cylinder, wherein, in described multiple vertical support oil cylinder telescopic process, hydraulic oil transporting resistance is applied to the oil-feed of the fast vertical support oil cylinder of the expanding-contracting action toggle speed in described multiple vertical support oil cylinder or oil return.
By technique scheme of the present invention, owing to being provided with flow control valve in the working oil path of the rodless cavity of vertical support oil cylinder or the oil inlet and oil return of rod chamber, along with the fluid flow flowed through is different, this flow control valve can produce different resistances, the oil inlet and oil return flow of the vertical support oil cylinder connected to regulate place working oil path, thus make the action moment of the vertical support oil cylinder with different resistance close to even identical, reduce the possibility that machinery is tumbled.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the schematic diagram of the telescopic control system of a kind of support oil cylinder in prior art;
Fig. 2 is the schematic diagram of the telescopic control system of support oil cylinder according to a kind of preferred implementation of the present invention;
Fig. 3 is the enlarged view of I part in Fig. 2;
Fig. 4 is for representing the schematic diagram of the expansion control loop of single support oil cylinder in Fig. 2;
Fig. 5 to Fig. 7 is the schematic diagram of the variant embodiment of the expansion control loop of single support oil cylinder in Fig. 4 respectively.
Description of reference numerals
The vertical support oil cylinder of 1 support oil cylinder 1a
1b horizontal support legs oil cylinder 2 first working oil path
3 second working oil path 4 series flow control valves
5 throttle valve 6 switching valves
7 main oil pump 8 emergencypumps
9 hydraulic control oil circuit 10 main reversing valves
11 fuel tank 12 one-way valves
13 support leg valve groups
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
With reference to shown in Fig. 2 to Fig. 7, according to the telescopic control system of the support oil cylinder of the specific embodiment of the invention, similarly to the prior art, multiple support oil cylinders 1 with vertical support oil cylinder 1a and horizontal support legs oil cylinder 1b can be comprised.In order to clearly illustrate, multiple vertical support oil cylinder 1a comprises again the second vertical support oil cylinder that the first vertical support oil cylinder and expanding-contracting action toggle speed are slower than the described first vertical support oil cylinder.Described in each, the rod chamber of vertical support oil cylinder 1a is connected to the first working oil path 2, described in each, the rodless cavity of vertical support oil cylinder 1a is connected to the second working oil path 3, first working oil path 2 and the second working oil path 3 are connected to shared hydraulic pressure fuel feeding element via each self-corresponding reversing control valve of each vertical support oil cylinder 1a, as main oil pump 7 or emergencypump 8, can be realized the oil inlet and oil return of each support oil cylinder 1 by the first working oil path 2 and the second working oil path 3, thus realize the expanding-contracting action of telescopic outrigger.Typically, as shown in Figure 2, each self-corresponding reversing control valve of above-mentioned vertical support oil cylinder 1a can be integrated into the support leg valve group 13 formed by multi-way valve.In the principle of carrying out the expansion control loop of single support oil cylinder below in conjunction with accompanying drawing 4 to accompanying drawing 7 illustrates, the main reversing valve 10 that this support leg valve group 13 will be split as reversing control valve.
Importantly, in the telescopic control system of support oil cylinder of the present invention, first working oil path 2 of at least described first vertical support oil cylinder or the second working oil path 3 are provided with flow control valve, this flow control valve is preferably series flow control valve 4 or throttle valve 5, the hydraulic oil transporting resistance of the first vertical support oil cylinder is regulated with the flow control by this flow control valve, thus shorten the time difference of the action moment of this first vertical support oil cylinder and the second vertical support oil cylinder, reduce the possibility that machinery is tumbled.
Specifically, all to arrange the mode of execution of throttle valve 5 in second working oil path 3 of each vertical support oil cylinder 1a, when to the rod chamber pumps hydraulic oil of vertical support oil cylinder 1a, because resistance difference causes from the first vertical support oil cylinder different with the hydraulic pressure oil mass that the rodless cavity of the second vertical support oil cylinder is discharged, make the hydraulic oil flow velocity flowing through throttle valve 5 also different, thus the hydraulic oil transporting resistance that the throttle valve 5 in the second working oil path 3 of the first vertical support oil cylinder produces is greater than the hydraulic oil transporting resistance that the throttle valve 5 in the second working oil path 3 of the second vertical support oil cylinder produces, consequently the oil return flow reduction of the rodless cavity of the second vertical support oil cylinder is greater than the oil return flow decrease of the rodless cavity of the first vertical support oil cylinder, with the object that the action moment reaching the vertical support oil cylinder 1a with different resistance is close.
Analyzed as can be seen from above, in the telescopic control system of support oil cylinder of the present invention, flow control valve can only be arranged in working oil path corresponding to the less vertical support oil cylinder 1a of resistance, also in first working oil path 2 of each vertical support oil cylinder 1a or the second working oil path 3, all can arrange flow control valve.Wherein, when flow control valve is chosen as series flow control valve 4, preferably be arranged in the first working oil path 2, so that pressure compensation effect can be produced by the load effect of vertical support oil cylinder 1a to the Fixed differential reducing valve in series flow control valve 4, in this embodiment, the speed governing effect of series flow control valve 4 can be utilized and make different vertical support oil cylinder movement speed consistent; When flow control valve is chosen as throttle valve 5, be preferably arranged in the second working oil path 3, its beneficial effect is, the withdrawal action of telescopic outrigger can be made more steady.
In addition, should be understood that, as shown in Figure 2, although the present invention only proposes hydraulic oil transporting resistance regulation scheme for the extension and contraction control of vertical support oil cylinder 1a, but also this technological scheme can be applied in the telescopic control system of horizontal support legs oil cylinder 1b, to make the expanding-contracting action of each horizontal support legs oil cylinder 1b closer to each other for opportunity.
When hydraulic oil is by flow control valve flow, need to consume portion of energy, this part energy will speed up hydraulic oil and goes bad.Therefore, according in the present invention comparatively preferred embodiment, first working oil path 2 at flow control valve place and the second working oil path 3 are also provided with switching valve 6, pass through flow control valve flow by the switching of this switching valve 6 so that optionally hydraulic control is oily.Particularly, when vertical support oil cylinder 1a stretches out, its toggle speed can not affect the safety of machinery, switching valve 6 therefore can be utilized to switch to and make the obstructed inflow-rate of water turbine control valve flowing of hydraulic oil; When vertical support oil cylinder 1a regains from the state of stretching out (namely telescopic outrigger is in holding state), utilize switching valve 6 to switch to and make hydraulic oil by flow control valve flow, shrink toggle speed to make each telescopic outrigger and reach unanimity.This optimal technical scheme has taken into account the energy consumption of system and the Security of equipment.
Whether above-mentioned switching valve 6 can pass through flow control valve by various ways hydraulic control oil.Such as, as shown in Figures 4 to 6, can series flow control valve 4 or throttle valve 5 be integrated in switching valve 6, switching valve 6 can have two working positions, wherein, during left position, filler opening is directly communicated with oil outlet, and during right position, filler opening is communicated with by series flow control valve 4 or throttle valve 5 with oil outlet.For another example, as illustrated in fig. 7, flow control valve (as series flow control valve 4 or throttle valve 5) can be made in parallel with the switching valve 6 with connected state and blocking state, switching valve 6 has two working positions, wherein, during left position, filler opening is directly communicated with oil outlet, and hydraulic oil flows mainly through switching valve 6; During right position, filler opening and oil outlet block, and hydraulic oil is by means of only flow control valve flow.
In addition, just as described abovely, switching valve 6 should switch according to actual needs, to take into account system energy consumption and device security.In machinery, be usually provided with main oil pump 7 and emergencypump 8, when main oil pump 7 breaks down, emergencypump 8 can be utilized to drive telescopic outrigger action.For avoiding the two to interact, one-way valve 12 can be set respectively on respective oil feeding line.The discharge capacity of main oil pump 7 is comparatively large, can meet the traffic demand of all support oil cylinders 1 fast, to drive each telescopic outrigger action, occur that the possibility that machinery is tumbled is less after startup.And the discharge capacity of emergencypump 8 is usually less, there is the relatively long time lag in the startup of the support oil cylinder 1 easily making resistance different, the possibility that machinery is tumbled is relatively large.Therefore, the telescopic control system of support oil cylinder can be set in emergencypump 8 pumps hydraulic oil, with under the state driving vertical support oil cylinder 1a and shrink, make hydraulic oil by flow control valve flow by the switching of switching valve 6.
As shown in Fig. 4, Fig. 5 and Fig. 7, switching valve 6 can be pilot operated directional control valve, and the hydraulic control mouth of this pilot operated directional control valve is communicated in the force feed mouth of emergencypump 8 by hydraulic control oil circuit 9, thus after emergencypump 8 starts, switching valve 6 commutates to making hydraulic oil by flow control valve flow under the Direct driver of emergencypump 8.
As another kind of Alternate embodiments, as shown in Figure 6, switching valve 6 also can be electric control reversing valve, emergencypump 8 start and stop by the control of controller (not shown), after emergencypump 8 starts, controller controls switching valve 6 and commutates to making hydraulic oil by flow control valve flow.
According to a further aspect in the invention, additionally provide a kind of machinery, this machinery comprises the telescopic control system of telescopic outrigger and the described support oil cylinder provided by the invention driven by support oil cylinder.Typically, described machinery is hoist, pump truck or fire-fighting truck.
In addition, the present invention also provides the telescopic control method of the support oil cylinder of engineering machinery, described engineering machinery comprises multiple vertical support oil cylinder, in the plurality of vertical support oil cylinder telescopic process, hydraulic oil transporting resistance is applied to the oil-feed of the fast vertical support oil cylinder of wherein expanding-contracting action toggle speed or oil return.Preferably, this transporting resistance can obtain by arranging flow control valve in first working oil path 2 or the second working oil path 3 of corresponding vertically support oil cylinder, but the present invention is not limited to this.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. the telescopic control system of a support oil cylinder, comprise multiple vertical support oil cylinder (1a), described multiple vertical support oil cylinder (1a) comprises the second vertical support oil cylinder that the first vertical support oil cylinder and expanding-contracting action toggle speed are slower than the described first vertical support oil cylinder, described in each, the rod chamber of vertical support oil cylinder (1a) is connected to the first working oil path (2), described in each, the rodless cavity of vertical support oil cylinder (1a) is connected to the second working oil path (3), described first working oil path (2) and second working oil path (3) of vertical support oil cylinder (1a) described in each are connected to shared hydraulic pressure fuel feeding element via each self-corresponding reversing control valve, it is characterized in that, described first working oil path (2) of at least described first vertical support oil cylinder or described second working oil path (3) are provided with flow control valve, the hydraulic oil transporting resistance of the described first vertical support oil cylinder is regulated with the flow control by this flow control valve.
2. the telescopic control system of support oil cylinder according to claim 1, it is characterized in that, described flow control valve is for being arranged on the series flow control valve (4) on described first working oil path (2), or described flow control valve is for being arranged on the throttle valve (5) on described second working oil path (3).
3. the telescopic control system of support oil cylinder according to claim 1, is characterized in that, described second working oil path (3) of vertical support oil cylinder (1a) described in each is provided with described flow control valve; Or described first working oil path (2) of vertical support oil cylinder (1a) is provided with described flow control valve described in each.
4. the telescopic control system of support oil cylinder as claimed in any of claims 1 to 3, it is characterized in that, described first working oil path (2) at described flow control valve place or described second working oil path (3) are provided with switching valve (6), and can pass through the switching of this switching valve (6), optionally hydraulic control is oily by described flow control valve flow.
5. the telescopic control system of support oil cylinder according to claim 4, is characterized in that, described flow control valve is integrated in described switching valve (6); Or
Described switching valve (6) can switch to connected state and blocking state, described flow control valve is in parallel with described switching valve (6), can be flowed by described flow control valve or described switching valve (6) by hydraulic control oil by the switching of described switching valve (6).
6. the telescopic control system of support oil cylinder according to claim 4, it is characterized in that, described telescopic control system comprises main oil pump (7) and emergencypump (8), in described emergencypump (8) pumps hydraulic oil with under the state driving described vertical support oil cylinder (1a) and shrink, described switching valve (6) switches to and makes hydraulic oil by described flow control valve flow.
7. the telescopic control system of support oil cylinder according to claim 6, it is characterized in that, described switching valve (6) is pilot operated directional control valve, and the control mouth of this pilot operated directional control valve is communicated in the force feed mouth of described emergencypump (8) by hydraulic control oil circuit (9).
8. the telescopic control system of support oil cylinder according to claim 6, it is characterized in that, described switching valve (6) is electric control reversing valve, described telescopic control system comprises the controller for controlling described emergencypump (8) start and stop, after described emergencypump (8) starts, described controller controls described switching valve (6) and switches to and make hydraulic oil by described flow control valve flow.
9. machinery, comprises the telescopic outrigger driven by support oil cylinder, it is characterized in that, described machinery also comprises the telescopic control system of support oil cylinder as claimed in any of claims 1 to 8.
10. the telescopic control method of the support oil cylinder of an engineering machinery, described engineering machinery comprises multiple vertical support oil cylinder (1a), it is characterized in that, in described multiple vertical support oil cylinder (1a) telescopic process, hydraulic oil transporting resistance is applied to the oil-feed of the fast vertical support oil cylinder of the expanding-contracting action toggle speed in described multiple vertical support oil cylinder (1a) or oil return.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410752205.5A CN104632735B (en) | 2014-12-09 | 2014-12-09 | Telescopic control system and method for support oil cylinders and mechanical equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410752205.5A CN104632735B (en) | 2014-12-09 | 2014-12-09 | Telescopic control system and method for support oil cylinders and mechanical equipment |
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| CN104632735A true CN104632735A (en) | 2015-05-20 |
| CN104632735B CN104632735B (en) | 2017-02-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107487736A (en) * | 2017-09-18 | 2017-12-19 | 沈阳农业大学 | A kind of high-altitude orchard operation assistance platform |
| CN108457326A (en) * | 2016-06-20 | 2018-08-28 | 黄雪峰 | A kind of working method towards excavator leg structure hydraulic control circuit |
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| JP2003239903A (en) * | 2002-02-18 | 2003-08-27 | Yaskawa Electric Corp | Actuator driving device |
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| CN104632735B (en) | 2017-02-01 |
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Address after: 410200 No. 997, Section 2, Tengfei Road, Wangcheng District, Changsha City, Hunan Province Patentee after: Hunan Zoomlion emergency equipment Co., Ltd Patentee after: Zoomlion Heavy Industry Co., Ltd Address before: 410200 No. 997, Jinxing Road, Wangcheng District, Changsha City, Hunan Province Patentee before: Changsha Zhonglian fire fighting Machinery Co., Ltd Patentee before: Zoomlion Heavy Industry Co., Ltd |
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