CN217129957U - Parallel hydraulic system - Google Patents
Parallel hydraulic system Download PDFInfo
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- CN217129957U CN217129957U CN202220815879.5U CN202220815879U CN217129957U CN 217129957 U CN217129957 U CN 217129957U CN 202220815879 U CN202220815879 U CN 202220815879U CN 217129957 U CN217129957 U CN 217129957U
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Abstract
The utility model provides a parallel hydraulic system, it includes: a hydraulic pump; the first hydraulic cylinder group comprises two or more first hydraulic cylinders which need to run synchronously; the hydraulic control system comprises a first main oil way and a second main oil way, wherein the first main oil way is connected with a first oil way interface of a hydraulic pump, the second main oil way is connected with a second oil way interface of the hydraulic pump, a control valve module is arranged on the first main oil way, and the control valve module comprises a main oil way opening and closing valve and a plurality of stages of flow dividing valves; each first branch oil way is communicated to a corresponding first oil inlet and outlet of each first hydraulic cylinder from the last-stage flow divider valve on the first main oil way, and each second branch oil way is communicated to a second main oil way from a second oil inlet and outlet of each first hydraulic cylinder; and a plurality of first branch oil paths and a plurality of second branch oil paths are used for connecting each first hydraulic cylinder of the first hydraulic cylinder group in parallel.
Description
Technical Field
The utility model relates to a hydraulic system especially relates to a parallel hydraulic system.
Background
The jacking and reversing control of the four-way vehicle supporting plate in the current market adopts a serial hydraulic structure, the machining precision requirement of a mechanical structure is high, and the assembly and debugging are difficult; the tandem type hydraulic structure has high use pressure, a plurality of assembly oil pipes, and more space occupied by the limited space of the four-way vehicle, so that the assembly and the debugging are difficult.
SUMMERY OF THE UTILITY MODEL
In view of the above, embodiments of the present invention provide a parallel hydraulic system to obviate or mitigate one or more of the disadvantages of the prior art.
The technical scheme of the utility model as follows:
the parallel hydraulic system includes:
a hydraulic pump having a first oil passage interface and a second oil passage interface;
the first hydraulic cylinder group comprises two or more first hydraulic cylinders which need to run synchronously;
the hydraulic control system comprises a first main oil way and a second main oil way, wherein the first main oil way is connected with a first oil way interface of a hydraulic pump, the second main oil way is connected with a second oil way interface of the hydraulic pump, a control valve module is arranged on the first main oil way, the control valve module comprises a main oil way opening and closing valve and a plurality of stages of flow dividing valves, and the stage arrangement of the flow dividing valves is matched with the number of first hydraulic cylinders of a first hydraulic cylinder group, so that the main oil way can branch oil ways with the same number as the first hydraulic cylinders;
each first branch oil way is communicated to a corresponding first oil inlet and outlet of each first hydraulic cylinder from the last-stage diverter valve on the first main oil way, and each second branch oil way is communicated to the second main oil way from a second oil inlet and outlet of each first hydraulic cylinder; and a branch oil path opening and closing valve is arranged on each first branch oil path or each second branch oil path, and the first branch oil paths and the second branch oil paths connect the first hydraulic cylinders of the first hydraulic cylinder group in parallel.
In some embodiments, each of the branch oil passage opening and closing valves of the first hydraulic cylinder group is controlled in a coordinated manner so that the first hydraulic cylinders of the first hydraulic cylinder group are operated in a synchronous motion.
In some embodiments, the parallel hydraulic system comprises a second hydraulic cylinder group, a plurality of third branch oil passages and a plurality of fourth branch oil passages;
the second hydraulic cylinder group comprises two or more second hydraulic cylinders which need to run synchronously;
each third branch oil way is communicated to the corresponding first oil inlet and outlet of each second hydraulic cylinder from the last-stage flow divider valve on the first main oil way, and each fourth branch oil way is communicated to the second main oil way from the second oil inlet and outlet of each second hydraulic cylinder; and a branch oil path on-off valve is arranged on each third branch oil path or each fourth branch oil path, and the plurality of third branch oil paths and the plurality of fourth branch oil paths connect the second hydraulic cylinders of the second hydraulic cylinder group in parallel.
In some embodiments, each branch oil path opening and closing valve of the second hydraulic cylinder group is controlled in a linkage mode, so that the second hydraulic cylinders of the second hydraulic cylinder group run in a synchronous movement mode.
In some embodiments, the first hydraulic cylinder group comprises four first hydraulic cylinders which need to run synchronously, and the control valve module on the first main oil way comprises two stages of flow dividing valves; one first-stage flow divider valve is arranged to divide the first main oil way into two ways; the second-stage flow divider is provided with two oil passages so as to divide the oil passages divided into two passages by the first-stage flow divider into four passages.
In some embodiments, the control valve module on the first main oil passage is provided with one main oil passage on-off valve, and the second main oil passage is also provided with one main oil passage on-off valve.
In some embodiments, the first main oil passage and the second main oil passage are both provided with unloading oil passages communicated with the oil tank, the connection nodes of the unloading oil passages and the main oil passages are positioned on the oil passages between the hydraulic pump and the main oil passage opening and closing valve, and the unloading oil passages are both provided with overflow valves.
In some embodiments, the first main oil passage and the second main oil passage are both provided with oil supplementing oil passages communicated with an oil tank, and the oil supplementing oil passages are both provided with one-way valves.
In some embodiments, the main oil passage opening-closing valve is a two-position two-way solenoid valve.
In some embodiments, the diverter valve is a proportional diverter valve.
The utility model discloses in, this hydraulic system adopts parallel hydraulic structure, and is synchronous by the flow divider control, and the oil pipe that the oil circuit needs is less, and assembly, debugging and maintenance etc. are all comparatively easy.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the following detailed description.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. For convenience in illustrating and describing some portions of the present invention, corresponding parts of the drawings may be exaggerated, i.e., may be larger, relative to other components in an exemplary device actually manufactured according to the present invention. In the drawings:
fig. 1 is a schematic structural diagram of a parallel hydraulic system according to an embodiment of the present invention.
Reference numerals are as follows:
1. an oil tank; 2. a hydraulic pump; 3. a first hydraulic cylinder group; 4. a second hydraulic cylinder group; 10. a first main oil passage; 20. a second main oil passage; 30. a control valve module; 31. a main oil path opening/closing valve; 32. a first stage diverter valve; 33. a second stage diverter valve; 34. an overflow valve; 40. a first branch oil path; 50. a second branch oil path; 60. a third branch oil path; 70. a fourth branch oil path; 80. an unloading oil way; 90. an oil supplementing oil way; 91. a one-way valve;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and/or process steps that are closely related to the solution according to the invention are shown in the drawings, while other details that are not relevant to the invention are omitted.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.
It is also noted herein that the term "coupled," if not specifically stated, may refer herein to not only a direct connection, but also an indirect connection in which an intermediate is present.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.
The utility model provides a parallel hydraulic system to reduce its assembly oil pipe and for parallel hydraulic system greatly reduced service pressure.
As shown in fig. 1, in some embodiments, the parallel hydraulic system may include an oil tank 1, a hydraulic pump 2, at least one hydraulic cylinder group, and an oil circuit.
The hydraulic pump 2 may be a bidirectional pump having a first oil passage and a second oil passage. The utility model discloses the system can provide power for one or more pneumatic cylinder group, and a plurality of pneumatic cylinders in every hydraulic cylinder group are parallelly connected to be arranged. For example, the first hydraulic cylinder group 3 includes two or more first hydraulic cylinders to be operated in synchronization.
The utility model discloses the oil circuit can include main oil circuit and branch oil circuit. The main oil passages may include a first main oil passage 10 and a second main oil passage 20, which are oil passages directly connected to the hydraulic pump 2. The first main oil path 10 is connected to a first oil path interface of the hydraulic pump 2, the second main oil path 20 is connected to a second oil path interface of the hydraulic pump 2, the first main oil path 10 is provided with a control valve module 30, the control valve module 30 includes a main oil path opening and closing valve 31 and a plurality of stages of diverter valves, and the number of the stages of the diverter valves is matched with the number of the first hydraulic cylinders of the first hydraulic cylinder group 3, so that the main oil path can branch oil paths with the same number as the first hydraulic cylinders.
The branch oil passages may include a plurality of first branch oil passages 40 and a plurality of second branch oil passages 50 for connecting the hydraulic cylinders in the hydraulic cylinder group in parallel. For example, each of the first branch oil passages 40 is communicated from the last-stage flow divider valve on the first main oil passage 10 to the corresponding first oil inlet and outlet of each of the first hydraulic cylinders, and each of the second branch oil passages 50 is communicated from the second oil inlet and outlet of each of the first hydraulic cylinders to the second main oil passage 20; a branch oil path on-off valve is provided in each of the first branch oil paths 40 or each of the second branch oil paths 50, and the first hydraulic cylinders of the first hydraulic cylinder group 3 are connected in parallel by the plurality of first branch oil paths 40 and the plurality of second branch oil paths 50.
In the embodiment, the hydraulic system adopts a parallel hydraulic structure, is controlled by the flow dividing valve to be synchronous, requires fewer oil pipes for an oil path, and is easy to assemble, debug, maintain and the like.
In some embodiments, each of the branch oil passage opening and closing valves of the first hydraulic cylinder group 3 is controlled in a coordinated manner so that the first hydraulic cylinders of the first hydraulic cylinder group 3 are operated in a synchronous motion.
In some embodiments, the parallel hydraulic system may further include a second hydraulic cylinder group 4, a plurality of third branch oil passages 60, and a plurality of fourth branch oil passages 70. Wherein the second hydraulic cylinder group 4 comprises two or more second hydraulic cylinders which need to run synchronously. The second hydraulic cylinders may be connected in parallel by a plurality of third branch oil passages 60 and a plurality of fourth branch oil passages 70. Specifically, each third branch oil passage 60 is communicated from the last-stage flow divider valve on the first main oil passage 10 to the corresponding first oil inlet and outlet of each second hydraulic cylinder, and each fourth branch oil passage 70 is communicated from the second oil inlet and outlet of each second hydraulic cylinder to the second main oil passage 20; a branch oil passage on-off valve is provided in each of the third branch oil passages 60 or each of the fourth branch oil passages 70, and the plurality of third branch oil passages 60 and the plurality of fourth branch oil passages 70 connect the second hydraulic cylinders of the second hydraulic cylinder group 4 in parallel. Similarly, the opening and closing valves of the respective oil passages of the second hydraulic cylinder group 4 are controlled in an interlocking manner so that the second hydraulic cylinders of the second hydraulic cylinder group 4 operate in a synchronous motion.
In some embodiments, the parallel hydraulic system may further include a third hydraulic cylinder group and the like, and each hydraulic cylinder group may operate independently or jointly.
In some embodiments, as shown in fig. 1, the first hydraulic cylinder group 3 may include four first hydraulic cylinders (S11/S12/S13/S14) which need to be operated synchronously, and correspondingly, there are four branch passage opening and closing valves; that is, the first cylinder S11 is controlled by the branch passage opening/closing valve SV11, the first cylinder S12 is controlled by the branch passage opening/closing valve SV12, the first cylinder S13 is controlled by the branch passage opening/closing valve SV13, and the first cylinder S14 is controlled by the branch passage opening/closing valve SV 14. The control valve module 30 on the first main oil path 10 can comprise a two-stage flow dividing valve; the first-stage flow dividing valve 32 is provided with one to divide the first main oil path 10 into two paths; the second-stage diverter valves are provided in two to divide the oil path divided into two paths by the first-stage diverter valve 32 into four paths.
Similarly, the second hydraulic cylinder group 4 may include four second hydraulic cylinders (S21/S22/S23/S24) which need to be operated synchronously, and four branch oil passage on-off valves (SV21/SV22/SV23/SV24) for controlling the operation thereof are provided.
In some embodiments, the control valve module 30 on the first main oil passage 10 is provided with one main oil passage on-off valve 31, and the second main oil passage 20 is also provided with one main oil passage on-off valve 31. The two main oil passage opening/closing valves 31 may be of a one-way type and may be in opposite flow directions, and when one of the main oil passage opening/closing valves 31 is communicated, the other main oil passage opening/closing valve 31 is closed.
In some embodiments, the first main oil passage 10 and the second main oil passage 20 are each provided with an unloading oil passage 80 communicating with the oil tank 1, a connection node of the unloading oil passage 80 and the main oil passage is located on an oil passage between the hydraulic pump 2 and the main oil passage opening and closing valve 31, and the unloading oil passages 80 are each provided with a relief valve 34. The relief oil passage 80 of the first main oil passage 10 and the relief valve 34 of the relief oil passage 80 of the second main oil passage 20 flow in opposite directions. The relief valve 34 provides safety protection. Accidents caused by overload of the hydraulic system and the connected moving parts are avoided. In this case, the relief valve 34 is normally closed, and is opened only when the load exceeds a predetermined limit. For example, the set pressure of the relief valve 34 may be adjusted to be 10-20% higher than the maximum operating pressure of the system.
In the above embodiment, the main oil passage opening-closing valve 31 on the first main oil passage 10, the respective-stage selector valves, the main oil passage opening-closing valve 31 on the second main oil passage 20, and the relief valves 34 on the two relief oil passages 80 may be integrally disposed on one valve block to reduce the installation space.
In some embodiments, the first main oil path 10 and the second main oil path 20 are both provided with an oil supply path 90 communicated with the oil tank 1, and the oil supply path 90 is provided with a check valve 91, so that the oil supply path 90 can only transmit the hydraulic oil in the oil tank 1 to the hydraulic pump 2, but cannot return the hydraulic oil in the main oil paths to the oil tank 1.
In some embodiments, the main oil path opening/closing valve 31 on each main oil path may be a two-position two-way solenoid valve, the branch oil path opening/closing valve on each branch oil path may be a two-position two-way solenoid valve, and the flow dividing valve may be a proportional flow dividing valve. The proportional flow divider valve can be provided with 1:1 proportional regulation flow and pressure and is suitable for the same hydraulic cylinder, but the set proportion is not limited to the flow and can be adjusted at any time by changing signals of a controller in the using process according to different using scenes.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A parallel hydraulic system, comprising:
a hydraulic pump having a first oil passage interface and a second oil passage interface;
the first hydraulic cylinder group comprises two or more first hydraulic cylinders which need to run synchronously;
the hydraulic control system comprises a first main oil way and a second main oil way, wherein the first main oil way is connected with a first oil way interface of a hydraulic pump, the second main oil way is connected with a second oil way interface of the hydraulic pump, a control valve module is arranged on the first main oil way, the control valve module comprises a main oil way opening and closing valve and a plurality of stages of flow dividing valves, and the stage arrangement of the flow dividing valves is matched with the number of first hydraulic cylinders of a first hydraulic cylinder group, so that the main oil way can branch oil ways with the same number as the first hydraulic cylinders;
each first branch oil way is communicated to a corresponding first oil inlet and outlet of each first hydraulic cylinder from the last-stage diverter valve on the first main oil way, and each second branch oil way is communicated to the second main oil way from a second oil inlet and outlet of each first hydraulic cylinder; and a branch oil path opening and closing valve is arranged on each first branch oil path or each second branch oil path, and the first branch oil paths and the second branch oil paths connect the first hydraulic cylinders of the first hydraulic cylinder group in parallel.
2. A parallel hydraulic system according to claim 1, wherein opening and closing valves of the branch oil passages of the first hydraulic cylinder group are controlled in a coordinated manner so that the first hydraulic cylinders of the first hydraulic cylinder group are operated in a synchronized motion.
3. A parallel hydraulic system according to claim 1, wherein the parallel hydraulic system includes a second cylinder bank, a plurality of third branch oil passages and a plurality of fourth branch oil passages;
the second hydraulic cylinder group comprises two or more second hydraulic cylinders which need to run synchronously;
each third branch oil way is communicated to the corresponding first oil inlet and outlet of each second hydraulic cylinder from the last-stage flow divider valve on the first main oil way, and each fourth branch oil way is communicated to the second main oil way from the second oil inlet and outlet of each second hydraulic cylinder; and a branch oil path on-off valve is arranged on each third branch oil path or each fourth branch oil path, and the plurality of third branch oil paths and the plurality of fourth branch oil paths connect the second hydraulic cylinders of the second hydraulic cylinder group in parallel.
4. A parallel hydraulic system according to claim 3, wherein the on-off valves of the hydraulic paths of the second hydraulic cylinder group are controlled in conjunction to operate the second hydraulic cylinders of the second hydraulic cylinder group in a synchronized motion.
5. A parallel hydraulic system according to claim 1, wherein the first hydraulic cylinder group comprises four first hydraulic cylinders to be operated synchronously, and the control valve module on the first main oil path comprises two stages of flow dividing valves; one first-stage flow divider valve is arranged to divide the first main oil way into two ways; the second-stage flow divider is provided with two oil passages so as to divide the oil passages divided into two passages by the first-stage flow divider into four passages.
6. A parallel hydraulic system according to claim 1 or 5, wherein the control valve module on the first main circuit is provided with one said main circuit on-off valve, and the second main circuit is also provided with one main circuit on-off valve.
7. A parallel hydraulic system according to claim 6, wherein the first and second main oil paths are each provided with an unloading oil path communicating with an oil tank, a connection node of the unloading oil path and the main oil path is located on an oil path between the hydraulic pump and an on-off valve of the main oil path, and each unloading oil path is provided with an overflow valve.
8. A parallel hydraulic system according to claim 1 or 7, wherein the first and second main oil circuits are each provided with an oil supply circuit communicating with an oil tank, and the oil supply circuits are each provided with a check valve.
9. A parallel hydraulic system according to claim 6, wherein the main oil path open-close valve is a two-position, two-way solenoid valve.
10. A parallel hydraulic system according to claim 1, wherein the diverter valve is a proportional diverter valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220815879.5U CN217129957U (en) | 2022-04-08 | 2022-04-08 | Parallel hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220815879.5U CN217129957U (en) | 2022-04-08 | 2022-04-08 | Parallel hydraulic system |
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| Publication Number | Publication Date |
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| CN217129957U true CN217129957U (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220815879.5U Active CN217129957U (en) | 2022-04-08 | 2022-04-08 | Parallel hydraulic system |
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| CN (1) | CN217129957U (en) |
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