CN105545838A - Balance valve oil hydraulic circuit - Google Patents
Balance valve oil hydraulic circuit Download PDFInfo
- Publication number
- CN105545838A CN105545838A CN201510996432.7A CN201510996432A CN105545838A CN 105545838 A CN105545838 A CN 105545838A CN 201510996432 A CN201510996432 A CN 201510996432A CN 105545838 A CN105545838 A CN 105545838A
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- CN
- China
- Prior art keywords
- valve
- hydraulic circuit
- hydraulic
- equilibrium
- port
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
Abstract
The invention relates to the field of hydraulic pressure and discloses a balance valve oil hydraulic circuit. The balance valve oil hydraulic circuit comprises an actuating element provided with a first operating oil port and a second operating oil port, and n balance valves (11). The n balance valves (11) are in parallel connection with one another and connected with the first operating oil port of the actuating element in series. All control oil ports of the n balance valves (11) communicate with the second operating oil port of the actuating element, and n is a natural number which is greater than or equal to two. According to the technical scheme of the balance valve oil hydraulic circuit, on the occasion of large flow working condition, balance valves with larger through-flow areas do not need to be designed and manufactured, the system pressure does not need to be increased or the operating speed of the actuating element does not need to be decreased; the good working effect can also be achieved on the premise that machining and manufacturing are convenient.
Description
Technical field
The present invention relates to Hydraulic Field, particularly, relate to a kind of balance valve hydraulic circuit.
Background technique
Equilibrium valve is hydraulic element important in Hydraulic Field, has a wide range of applications.
Such as, Figure 1 shows that a kind of typical balance valve hydraulic circuit.As shown in Figure 1, this balance valve hydraulic circuit comprises oil hydraulic cylinder 10, and the rodless cavity of this oil hydraulic cylinder 10 is in series with an equilibrium valve 11.In FIG, equilibrium valve 11 has the first hydraulic fluid port 111 and the second hydraulic fluid port 112 and control port 113, and wherein, the first hydraulic fluid port 111 is connected to oil sources, and the second hydraulic fluid port 112 is connected to the rodless cavity of oil hydraulic cylinder 10, and control port 113 is connected to rod chamber by oil circuit.
When needs hydraulic rod stretches out, equilibrium valve 11 is in the first hydraulic fluid port 111 unilaterally connected in the primary importance left position of equilibrium valve 11 (namely in Fig. 1) of the second hydraulic fluid port 112, and pressure oil-source P1 enters rodless cavity by the first hydraulic fluid port 111 through the second hydraulic fluid port 112; Meanwhile, the hydraulic oil in rod chamber flows back to fuel tank.
When needs hydraulic rod bounces back, pressure oil-source P2 enters rod chamber, act on the control port 113 of equilibrium valve 11 simultaneously, thus the second place making equilibrium valve be in the first hydraulic fluid port 111 to be communicated with the second hydraulic fluid port 112 right position of equilibrium valve 11 (namely in Fig. 1), the hydraulic oil in rodless cavity flows back to fuel tank by the second hydraulic fluid port 112, first hydraulic fluid port 111 successively.
Along with the development of engineering machinery, in order to obtain desirable running stability and response rapidity under more harsh working condition, the requirement for the hydraulic element in engineering machinery is also more and more higher.Such as, for hoist, lifting weight and package size become increasing, thus require that its flow as oil hydraulic cylinder or oil hydraulic motor as Hydraulic power units is increasing, simultaneously with it with the use of the flow of equilibrium valve also increasing, and then also more and more higher to the requirement of the structure of equilibrium valve, oil circuit design and spool action.
But, at present for the equilibrium valve that large discharge requires, be mostly realized by the larger flow area of design, or realized by the working pressure of increase equilibrium valve or the motion speed of reduction executive component (as oil hydraulic cylinder).But this will cause the manufacture cost of equilibrium valve significantly to rise on the one hand, be also difficult on the other hand obtain good working effect, such as working pressure rises and system temperature will be caused to raise, and the motion speed reducing executive component will reduce working efficiency.
Therefore, for the equilibrium valve that large discharge requires, how can obtain good balance between good working effect and manufacturing becomes the technical issues that need to address.
Summary of the invention
The object of this invention is to provide a kind of balance valve hydraulic circuit being applicable to the executive component of large discharge, this balance valve hydraulic circuit is convenient to manufacture and can obtain good working effect.
To achieve these goals, the invention provides a kind of balance valve hydraulic circuit, this balance valve hydraulic circuit comprises: executive component, and this executive component has the first actuator port and the second actuator port; N equilibrium valve, this n equilibrium valve be connected in parallel to each other arrange and be connected in series with the first actuator port of described executive component, the control port of a described n equilibrium valve is all communicated with the second actuator port of described executive component, n be more than or equal to 2 natural number.
Preferably, described executive component is oil hydraulic cylinder, and this oil hydraulic cylinder has the first actuator port being communicated in rodless cavity and the second actuator port being communicated in rod chamber.
Preferably, each equilibrium valve comprises the first hydraulic fluid port and the second hydraulic fluid port and control port, first hydraulic fluid port of each described equilibrium valve is all connected to oil sources, second hydraulic fluid port of each described equilibrium valve is all connected to the first actuator port of described oil hydraulic cylinder, and the described control port of each described equilibrium valve is all communicated in the second actuator port of described oil hydraulic cylinder.
Preferably, a described n equilibrium valve is formed as single integrated valve group.
Preferably, described balance valve hydraulic circuit also comprises the flow control valve be arranged in parallel with a described n equilibrium valve.
Preferably, described flow control valve is that only authorized pressure hydraulic oil flows to the one-way valve of described first actuator port of described executive component from oil sources.
Preferably, described one-way valve is n, and each one-way valve corresponds to respective equilibrium valve.
Preferably, described flow control valve is electrically switchable grating valve or hydraulic-controlled switch valve.
Preferably, described balance valve hydraulic circuit also comprises the safety overflow valve be arranged in parallel with a described n equilibrium valve.
Preferably, a described n equilibrium valve has identical specifications parameter, and the rated flow of described executive component is not less than the n of the rated flow of single equilibrium valve doubly.
Pass through technique scheme, for the operating mode occasion of large discharge, without the need to manufacturing and designing the equilibrium valve of larger flow area, also without the need to increasing the motion speed of system pressure or reduction executive component, thus under the prerequisite being convenient to manufacturing, good working effect can be obtained equally.
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 traditional balance valve hydraulic circuit;
Fig. 2 is that equilibrium valve constrains the schematic diagram in loop according to the preferred embodiment of the present invention.
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.
The invention provides a kind of balance valve hydraulic circuit, this balance valve hydraulic circuit comprises: executive component, and this executive component has the first actuator port and the second actuator port; With n equilibrium valve 11, this n equilibrium valve 11 be connected in parallel to each other arrange and be connected in series with the first actuator port of described executive component, the control port 113 of n equilibrium valve 11 is all communicated with the second actuator port of executive component, n be more than or equal to 2 natural number.
In Hydraulic Field, executive component can comprise oil hydraulic motor and oil hydraulic cylinder.Therefore, technological scheme of the present invention is applicable to oil hydraulic motor, the oil hydraulic motor adopted in such as hoisting system.Be applicable to oil hydraulic cylinder 10 as depicted in figs. 1 and 2 too.In the balance valve hydraulic circuit shown in Fig. 1 and Fig. 2, oil hydraulic cylinder 10 has the first actuator port 101 being communicated in rodless cavity and the second actuator port 102 being communicated in rod chamber.
In the preferred embodiment of the present invention shown in Fig. 2, oil hydraulic cylinder 10 is applied to the operating mode of large discharge, and therefore in order to be adapted to the requirement of large discharge operating mode, the equilibrium valve 10 being series at the first actuator port 101 of oil hydraulic cylinder 10 has the multiple and setting that is connected in parallel to each other.And according to different duty requirements, the quantity of equilibrium valve 10 can be selected design, can be 2 (as shown in Figure 2) or more.Therefore, compared with the situation shown in Fig. 1, when adopting the equilibrium valve of substantially identical or similar regulation, owing to being provided with multiple equilibrium valve, thus the hydraulic oil of more large discharge can be supplied to executive component, to be applicable to the operating mode occasion of large discharge.
Thus, according to technological scheme of the present invention, without the need to manufacturing and designing the equilibrium valve of larger flow area, also without the need to increasing the motion speed of system pressure or reduction executive component, thus under the prerequisite being convenient to manufacturing, good working effect can be obtained equally, to realize object of the present invention.
Specifically, as shown in Figure 2, each equilibrium valve 11 comprises the first hydraulic fluid port 111 and the second hydraulic fluid port 112 and control port 113, first hydraulic fluid port 111 of each equilibrium valve 11 is all connected to oil sources (according to different operating mode, oil sources can be fuel tank or pressure oil-source), second hydraulic fluid port 112 of each equilibrium valve 11 is all connected to the first actuator port 101 of oil hydraulic cylinder 10, and the control port 113 of each equilibrium valve 11 is all communicated in the second actuator port 102 of oil hydraulic cylinder 10.
The working method of each equilibrium valve 11 is identical with traditional equilibrium valve or similar, in the present invention multiple equilibrium valve is arranged in parallel, thus define the equilibrium valve group that set has the through-current capability of the plurality of equilibrium valve, obviously more can be adapted to the operating mode occasion compared with large discharge.
The plurality of equilibrium valve 11 can be connected to each other by hydraulic pipe line, but in the preferred case, n equilibrium valve is formed as single integrated valve group.Thus the first hydraulic fluid port 111 of multiple equilibrium valve 11 is integrated into a hydraulic fluid port, the second hydraulic fluid port 112 of multiple equilibrium valve 11 is integrated into another hydraulic fluid port, the control port 113 of multiple equilibrium valve 11 is integrated into a control port.
The working procedure of this balance valve hydraulic circuit is described in detail below with reference to Fig. 2.
As shown in Figure 2, when needing the hydraulic rod of oil hydraulic cylinder 10 to stretch out, pressure oil-source flows to the first hydraulic fluid port 111 of each equilibrium valve 11 under the control of a control valve, now because each equilibrium valve is in left position, therefore pressurized hydraulic oil so that be pooled in the rodless cavity of oil hydraulic cylinder 10 by each second hydraulic fluid port 112 and the first actuator port 101.Meanwhile, the hydraulic oil in the rod chamber of oil hydraulic cylinder 10 is back to fuel tank by the second actuator port 102.
When needing the hydraulic rod of oil hydraulic cylinder 10 to shrink, pressure oil-source flows in the rod chamber of oil hydraulic cylinder 10 by the second actuator port 102 under the control of a control valve, pressure oil-source is applied to the control port 113 of each equilibrium valve 11 simultaneously, and makes each equilibrium valve 11 be in right position.Hydraulic oil in the rodless cavity of oil hydraulic cylinder 10 flows to the second hydraulic fluid port 112 of each equilibrium valve by the first actuator port 101, and then is back to oil sources (as fuel tank) by each first hydraulic fluid port 111.
When needing the hydraulic rod of oil hydraulic cylinder 10 to keep motionless, without pressure oil-source supply, now each equilibrium valve 11 is in left position, and the hydraulic oil in the rodless cavity of oil hydraulic cylinder 10 cannot be flowed out by each equilibrium valve 11, and therefore each equilibrium valve 11 is in lockup state.
As mentioned above, the control port 113 of each equilibrium valve 11 is subject to the control of the hydraulic oil of the second actuator port 102 of executive component.In order to enable balance valve hydraulic circuit at the working condition requirement being adapted to large discharge to a greater extent, the equilibrium valve 11 designing varying number can be selected.Further preferably, as shown in Figure 2, balance valve hydraulic circuit also comprises the flow control valve be arranged in parallel with n equilibrium valve.
By arranging this flow control valve, when the large discharge that a said n equilibrium valve still can not meet the first actuator port 101 leading to executive component requires, this flow control valve can be opened or the flow area of this flow control valve is continued to tune up.Therefore, the existence of this flow control valve, expands technical solution of the present invention further for the adaptive capacity of large discharge executive component and scope.
Flow control valve can select the various suitable valve element that can regulate flow.As shown in Figure 2, described flow control valve can be that only authorized pressure hydraulic oil flows to the one-way valve 12 of described first actuator port of described executive component from oil sources; Also can be electrically switchable grating valve or hydraulic-controlled switch valve.
Further preferably, one-way valve 12 is n, and each one-way valve 12 corresponds to respective equilibrium valve 11, thus obtains more meticulous Flow-rate adjustment ability.
In addition, as shown in Figure 2, balance valve hydraulic circuit also comprises the safety overflow valve 13 be arranged in parallel with n equilibrium valve, in case locking system overpressure.Between the control port 113 and the second actuator port 102 of executive component of each equilibrium valve 11, be provided with at least one filter, with the control port 113 preventing pollutant from entering equilibrium valve, thus ensure equilibrium valve reliability of operation.
As mentioned above, for the working condition requirement of the executive component of large discharge, utilize multiple equilibrium valves with good manufacturing to be arranged in parallel, thus obtain good working effect with less manufacture cost.Under normal circumstances, n equilibrium valve 11 has identical specifications parameter, thus obtains better interchangeability, and the rated flow Q of executive component is not less than the n of the rated flow q of single equilibrium valve doubly simultaneously.Further preferably, executive component rated flow Q slightly larger than or equal single equilibrium valve rated flow q n doubly.
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. balance valve hydraulic circuit, is characterized in that, this balance valve hydraulic circuit comprises:
Executive component, this executive component has the first actuator port and the second actuator port; With
N equilibrium valve (11), this n equilibrium valve (11) is connected in parallel to each other and arranges and be connected in series with the first actuator port of described executive component, the control port of a described n equilibrium valve (11) is all communicated with the second actuator port of described executive component, n be more than or equal to 2 natural number.
2. balance valve hydraulic circuit according to claim 1, it is characterized in that, described executive component is oil hydraulic cylinder (10), and this oil hydraulic cylinder (10) has the first actuator port (101) being communicated in rodless cavity and the second actuator port (102) being communicated in rod chamber.
3. balance valve hydraulic circuit according to claim 2, it is characterized in that, each equilibrium valve (11) comprises the first hydraulic fluid port (111) and the second hydraulic fluid port (112) and control port (113), first hydraulic fluid port (111) of each described equilibrium valve (11) is all connected to oil sources, second hydraulic fluid port (112) of each described equilibrium valve (11) is all connected to first actuator port (101) of described oil hydraulic cylinder (10), the described control port (113) of each described equilibrium valve (11) is all communicated in second actuator port (102) of described oil hydraulic cylinder (10).
4. according to the balance valve hydraulic circuit in claim 1-3 described in any one, it is characterized in that, a described n equilibrium valve is formed as single integrated valve group.
5. according to the balance valve hydraulic circuit in claim 1-3 described in any one, it is characterized in that, this balance valve hydraulic circuit also comprises the flow control valve be arranged in parallel with a described n equilibrium valve.
6. balance valve hydraulic circuit according to claim 5, is characterized in that, described flow control valve is that only authorized pressure hydraulic oil flows to the one-way valve (12) of described first actuator port of described executive component from oil sources.
7. balance valve hydraulic circuit according to claim 6, is characterized in that, described one-way valve (12) is n, and each one-way valve (12) is corresponding to respective equilibrium valve (11).
8. balance valve hydraulic circuit according to claim 5, is characterized in that, described flow control valve is electrically switchable grating valve or hydraulic-controlled switch valve.
9. balance valve hydraulic circuit according to claim 1, is characterized in that, this balance valve hydraulic circuit also comprises the safety overflow valve (13) be arranged in parallel with a described n equilibrium valve.
10. balance valve hydraulic circuit according to claim 1, is characterized in that, a described n equilibrium valve (11) has identical specifications parameter, and the rated flow of described executive component is not less than the n of the rated flow of single equilibrium valve doubly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510996432.7A CN105545838A (en) | 2015-12-28 | 2015-12-28 | Balance valve oil hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510996432.7A CN105545838A (en) | 2015-12-28 | 2015-12-28 | Balance valve oil hydraulic circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105545838A true CN105545838A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510996432.7A Pending CN105545838A (en) | 2015-12-28 | 2015-12-28 | Balance valve oil hydraulic circuit |
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| CN (1) | CN105545838A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194336A (en) * | 2017-12-27 | 2018-06-22 | 湖南响箭重工科技有限公司 | Pressure control valve group for debugging pumping equipment, automatic debugging system, pumping equipment and automatic debugging method |
| CN114412855A (en) * | 2022-01-25 | 2022-04-29 | 徐州重型机械有限公司 | Crane telescopic control system and crane |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002061607A (en) * | 2000-08-17 | 2002-02-28 | Shin Caterpillar Mitsubishi Ltd | Hydraulic circuit of working machine |
| CN201502576U (en) * | 2009-09-09 | 2010-06-09 | 南京晨光集团有限责任公司 | Balance valve unit for large-load main oil cylinder |
| EP2474746A1 (en) * | 2009-09-02 | 2012-07-11 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive device for hydraulic working machine |
| CN202402386U (en) * | 2012-01-05 | 2012-08-29 | 中联重科股份有限公司 | Balance valve, hydraulic cylinder control circuit and crane |
| US8430016B2 (en) * | 2009-06-09 | 2013-04-30 | Husco International, Inc. | Control valve assembly with a workport pressure regulating device |
| CN203384145U (en) * | 2013-07-09 | 2014-01-08 | 山东华辰重型机床有限公司 | Hydraulic system for clamping and loosening working table |
| CN204140521U (en) * | 2014-09-26 | 2015-02-04 | 长沙中联消防机械有限公司 | Hydraulic control circuit, side ladder device and fire-fighting truck |
| CN204664029U (en) * | 2015-05-18 | 2015-09-23 | 钟爱生 | A kind of hydraulic balance system with emergency loop |
-
2015
- 2015-12-28 CN CN201510996432.7A patent/CN105545838A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002061607A (en) * | 2000-08-17 | 2002-02-28 | Shin Caterpillar Mitsubishi Ltd | Hydraulic circuit of working machine |
| US8430016B2 (en) * | 2009-06-09 | 2013-04-30 | Husco International, Inc. | Control valve assembly with a workport pressure regulating device |
| EP2474746A1 (en) * | 2009-09-02 | 2012-07-11 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive device for hydraulic working machine |
| CN201502576U (en) * | 2009-09-09 | 2010-06-09 | 南京晨光集团有限责任公司 | Balance valve unit for large-load main oil cylinder |
| CN202402386U (en) * | 2012-01-05 | 2012-08-29 | 中联重科股份有限公司 | Balance valve, hydraulic cylinder control circuit and crane |
| CN203384145U (en) * | 2013-07-09 | 2014-01-08 | 山东华辰重型机床有限公司 | Hydraulic system for clamping and loosening working table |
| CN204140521U (en) * | 2014-09-26 | 2015-02-04 | 长沙中联消防机械有限公司 | Hydraulic control circuit, side ladder device and fire-fighting truck |
| CN204664029U (en) * | 2015-05-18 | 2015-09-23 | 钟爱生 | A kind of hydraulic balance system with emergency loop |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194336A (en) * | 2017-12-27 | 2018-06-22 | 湖南响箭重工科技有限公司 | Pressure control valve group for debugging pumping equipment, automatic debugging system, pumping equipment and automatic debugging method |
| CN114412855A (en) * | 2022-01-25 | 2022-04-29 | 徐州重型机械有限公司 | Crane telescopic control system and crane |
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Application publication date: 20160504 |