CN113323932A - Double-pump confluence control system - Google Patents
Double-pump confluence control system Download PDFInfo
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- CN113323932A CN113323932A CN202110704888.7A CN202110704888A CN113323932A CN 113323932 A CN113323932 A CN 113323932A CN 202110704888 A CN202110704888 A CN 202110704888A CN 113323932 A CN113323932 A CN 113323932A
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- valve
- oil
- confluence
- valve core
- hydraulic pump
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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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- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
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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 belongs to the technical field of hydraulic control of engineering machinery, and relates to a double-pump confluence control system which comprises a first hydraulic pump, a second hydraulic pump, a confluence valve, a multi-way valve and a single union valve, wherein the first hydraulic pump can directly supply oil to the multi-way valve, the second hydraulic pump supplies oil to the confluence valve through the single union valve and can enable the confluence valve to supply auxiliary oil to the multi-way valve, a selection valve is further arranged between the multi-way valve and the confluence valve and can enable the confluence valve to control whether the second hydraulic pump is confluent with the first hydraulic pump or not, the confluence valve comprises a confluence valve first valve core, a confluence valve second valve core and a confluence valve third valve core, and oil inlets of the confluence valve first valve core and the confluence valve second valve core are connected with a first oil outlet of the single union valve. The invention can realize any action confluence according to the working condition requirement without influencing other actions, not only gives consideration to the slow movement of some mechanisms, but also can realize the quick movement of some mechanisms; the method has the advantages of low cost, high reliability, long service life and the like.
Description
Technical Field
The invention belongs to the technical field of hydraulic control of engineering machinery, and particularly relates to a double-pump confluence control system.
Background
The engineering machinery is characterized in that due to the working characteristics of the engineering machinery, a plurality of mechanisms act independently or jointly to achieve the intention of an operator. Each mechanism is controlled to move by one or more oil cylinders, and in order to meet the working efficiency and the operation comfort of an operator, each mechanism needs to set the movement speed according to the movement characteristics of the mechanism, so that some mechanisms need to move quickly, and some mechanisms need to move slowly. In order to enable some mechanisms to move rapidly and some mechanisms to move slowly, at present, many engineering machinery hydraulic systems adopt a method of preferentially ensuring the flow required by the rapid movement mechanism and adopting a flow dividing valve to divide part of the flow for some mechanisms requiring slow movement. Although the requirement of different mechanisms for quick and slow movement can be met, the part of the hydraulic oil which is branched off always flows back to the oil tank at the working pressure, and the part of energy is consumed in the form of heat. On the basis, a double-pump system appears, namely, a large-displacement pump is adopted by a plurality of mechanisms with close flow, and whether a small-displacement pump is combined with the large-displacement pump or not is controlled by an electromagnetic valve.
At present, the double-pump confluence is generally disclosed by a patent auxiliary joint control system for loader accessories, which comprises the following steps: CN211693001U discloses a technique that can achieve a certain action merge and improve work efficiency.
However, if the maximum pressure set by the system is reached during the confluence, the scheme will overflow, causing the system to generate heat, and at the same time, only a certain confluence flow is available, and the large chamber and the small chamber of the oil cylinder controlled by the confluence flow are confluent. When one of the large cavity and the small cavity of the oil cylinder is required to be combined, the other cavity is required to be not combined, and a sensor and a controller are required to be added.
Disclosure of Invention
The invention aims to solve the defects and shortcomings in the prior art, and provides a double-pump confluence control system which can realize arbitrary action confluence without influencing other actions according to working condition requirements and reduce system heating.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a double pump confluence control system, includes first hydraulic pump, second hydraulic pump, confluence valve, multiple unit valve and single union valve, first hydraulic pump can directly give the fuel feeding of multiple unit valve, the second hydraulic pump passes through the single union valve and gives the confluence valve fuel feeding and can make the confluence valve give the multiple unit valve supplementary fuel feeding, still be equipped with the selection valve between multiple unit valve and the confluence valve, the selection valve can make confluence valve control second hydraulic pump whether with first hydraulic pump confluence.
Preferably, the confluence valve comprises a first valve core of the confluence valve, a second valve core of the confluence valve and a third valve core of the confluence valve, oil inlets of the first valve core of the confluence valve and the second valve core of the confluence valve are both connected with a first oil outlet of the unilink valve, an oil return port of the first valve core of the confluence valve is connected with an oil tank, and an oil outlet of the second valve core of the confluence valve is connected with an oil inlet of the multi-way valve.
Preferably, an oil inlet of the third valve core of the confluence valve is connected with an oil outlet of the selection valve, an oil outlet of the third valve core of the confluence valve is connected with a control oil port of the first valve core of the confluence valve, and an oil return port of the third valve core of the confluence valve is connected with an oil tank.
Preferably, the multi-way valve comprises a first valve core of the multi-way valve and a second valve core of the multi-way valve, and control oil ports of the first valve core of the multi-way valve and the second valve core of the multi-way valve are respectively connected with two oil inlets of the selector valve.
Preferably, a first oil outlet of the first valve core of the multi-way valve is connected with an oil inlet of the second valve core of the multi-way valve, a second oil outlet and a third oil outlet of the first valve core of the multi-way valve are respectively connected with a rod cavity and a rodless cavity of the first oil cylinder, a first oil outlet of the second valve core of the multi-way valve is connected with an oil tank, and a second oil outlet and a third oil outlet of the second valve core of the multi-way valve are respectively connected with a rodless cavity and a rod cavity of the second oil cylinder.
Preferably, the second oil outlet and the third oil outlet of the single-connection valve are respectively connected with a rodless cavity and a rod cavity of the third oil cylinder.
Preferably, the oil outlets of the first hydraulic pump and the second hydraulic pump are both connected with overflow valves.
After the technical scheme is adopted, the double-pump confluence control system provided by the invention has the following beneficial effects:
the invention can realize any action confluence according to the working condition requirement without influencing other actions, not only gives consideration to the slow movement of some mechanisms, but also can realize the quick movement of some mechanisms; when the first oil source and the second oil source are converged and the pressure of the first oil source exceeds the set pressure, the oil of the second oil source is unloaded, the first oil source and the second oil source are converged, the second oil source returns to the oil tank without pressure, the hydraulic power is ensured not to exceed the power of an engine, and therefore low pressure, large flow and high pressure and small flow are achieved. The invention also has the advantages of low cost, high reliability, long service life and the like.
Drawings
FIG. 1 is a schematic diagram of a dual pump merge control system of the present invention.
Wherein: the hydraulic control system comprises a flow combining valve 1, a selector valve 2, multi-way valve first valve core control oil 3/9, a multi-way valve 4, multi-way valve second valve core control oil 5/7, a second oil cylinder 6, a first oil cylinder 8, a third oil cylinder 10, single-linkage valve core control oil 11/12 and a single-linkage valve 13.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings and detailed description, in which it is to be understood that the embodiments described are merely illustrative of some, but not all embodiments of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The invention discloses a double-pump confluence control system, which comprises a first hydraulic pump P1, a second hydraulic pump P2, a confluence valve 1, a multi-way valve 4 and a single-link valve 13, wherein the first hydraulic pump P1 can directly supply oil to the multi-way valve 4, the second hydraulic pump P2 supplies oil to the confluence valve 1 through the single-link valve 13 and can enable the confluence valve 1 to supply auxiliary oil to the multi-way valve 4, specifically, an oil outlet of the first hydraulic pump P1 is connected with an oil inlet of the multi-way valve 4, an oil outlet of the second hydraulic pump P2 is connected with an oil inlet of the single-link valve 13, a selector valve 2 is further arranged between the multi-way valve 4 and the confluence valve 1, and the selector valve 2 can enable the confluence valve 1 to control whether the second hydraulic pump P2 is confluent with the first hydraulic pump P1.
The flow merging valve 1 comprises a first valve core of the flow merging valve, a second valve core of the flow merging valve and a third valve core of the flow merging valve, oil inlets of the first valve core of the flow merging valve and the second valve core of the flow merging valve are connected with a first oil outlet of a single-connection valve 13, an oil return port of the first valve core of the flow merging valve is connected with an oil tank, an oil outlet of the second valve core of the flow merging valve is connected with an oil inlet of a multi-way valve 4, an oil inlet of the third valve core of the flow merging valve is connected with an oil outlet of a selection valve 2, an oil outlet of the third valve core of the flow merging valve is connected with a control oil port of the first valve core of the flow merging valve, and an oil return port of the third valve core of the flow merging valve is connected with the oil tank.
The multi-way valve 4 comprises a first multi-way valve spool and a second multi-way valve spool, control oil ports of the first multi-way valve spool and the second multi-way valve spool are respectively connected with two oil inlets of the selector valve 2, further, a first oil outlet of the first multi-way valve spool is connected with an oil inlet of the second multi-way valve spool, a second oil outlet and a third oil outlet of the first multi-way valve spool are respectively connected with a rod cavity and a multi-way rod-free cavity of the first oil cylinder 8, a first oil outlet of the second multi-way valve spool is connected with an oil tank, and a second oil outlet and a third oil outlet of the second multi-way valve spool are respectively connected with a rod-free cavity and a rod cavity of the second oil cylinder 6.
And a second oil outlet and a third oil outlet of the simply connected valve 13 are respectively connected with a rodless cavity and a rod cavity of the third oil cylinder 10.
Further, the oil outlets of the first hydraulic pump P1 and the second hydraulic pump P2 are both connected with overflow valves.
When the double-pump confluence control system works, when a certain valve core or a plurality of valve cores of the multi-way valve 4 need to be confluent, only control oil for controlling the certain valve core or the plurality of valve cores needs to be connected into the selector valve 2, so that the control oil for controlling the certain valve core or the plurality of valve cores can selectively enter the right side of the first valve core of the confluence valve 1 through the selector valve 2 when the valve core of the multi-way valve moves, and a first oil source and a second oil source flow to a valve plate needing to be confluent after being confluent; the valve core of the multi-way valve 3 which is not connected with the valve core of the selector valve 2 controls oil to only control the movement of the valve core of the multi-way valve 4, and the valve core of the confluence valve 1 cannot be controlled; in the present embodiment, the control oil liquid P1 and P2 is introduced into the selector valve 2, and the second cylinder 6 and the first cylinder 8 can be merged in one direction and not merged in the other direction as required.
In conclusion, the double-pump confluence control system provided by the invention can realize confluence of large and small oil cylinder cavities (openings of the motor A, B) controlled by one or more than one multi-way valve; the non-confluence of the large cavities (the ports A of the motors) and the small cavities (the ports B of the motors) of the oil cylinders controlled by one or more than one multi-way valve can also be realized; or the small cavities (the ports B of the motors) of the oil cylinders controlled by one or more than one multi-way valve are merged and the large cavities (the ports A of the motors) are not merged; the multi-way valve can also realize that the small oil cylinder cavity (the port B of the motor) controlled by one or more than one unit does not merge with the large oil cylinder cavity (the port A of the motor), and the large oil cylinder cavity (the port A of the motor) controlled by the other or more than one unit does not merge with the small oil cylinder cavity (the port B of the motor). In short, the n cylinder size chambers (ports A, B) that can be controlled by the multi-way valve may be individually merged or not, and may be set by the selector valve as required by the operation of the cylinder (port A, B).
Therefore, the invention can realize any action confluence according to the working condition requirement without influencing other actions, not only gives consideration to slow movement of some mechanisms, but also can realize quick movement of some mechanisms, has the advantages of lower cost, high reliability, long service life and the like, has great market value, and is worthy of wide popularization and application.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A dual pump confluence control system, characterized in that: including first hydraulic pump (P1), second hydraulic pump (P2), confluence valve (1), multiple unit valve (4) and simply connected valve (13), first hydraulic pump (P1) can directly give multiple unit valve (4) fuel feeding, second hydraulic pump (P2) give confluence valve (1) fuel feeding and can make confluence valve (1) give multiple unit valve (4) supplementary fuel feeding through simply connected valve (13), still be equipped with selector valve (2) between multiple unit valve (4) and confluence valve (1), selector valve (2) can make confluence valve (1) control second hydraulic pump (P2) whether with first hydraulic pump (P1) confluence.
2. A dual pump merge control system according to claim 1, wherein: the flow merging valve (1) comprises a first valve core of the flow merging valve, a second valve core of the flow merging valve and a third valve core of the flow merging valve, oil inlets of the first valve core of the flow merging valve and the second valve core of the flow merging valve are connected with a first oil outlet of the single-connection valve (13), an oil return port of the first valve core of the flow merging valve is connected with an oil tank, and an oil outlet of the second valve core of the flow merging valve is connected with an oil inlet of the multi-way valve (4).
3. A dual pump merge control system according to claim 2, wherein: an oil inlet of the third valve core of the confluence valve is connected with an oil outlet of the selection valve (2), an oil outlet of the third valve core of the confluence valve is connected with a control oil port of the first valve core of the confluence valve, and an oil return port of the third valve core of the confluence valve is connected with an oil tank.
4. A dual pump merge control system according to claim 1, wherein: the multi-way valve (4) comprises a first multi-way valve core and a second multi-way valve core, and control oil ports of the first multi-way valve core and the second multi-way valve core are respectively connected with two oil inlets of the selector valve (2).
5. The dual-pump merge control system of claim 4, wherein: the first oil outlet of the first valve core of the multi-way valve is connected with the oil inlet of the second valve core of the multi-way valve, the second oil outlet and the third oil outlet of the first valve core of the multi-way valve are respectively connected with the rod cavity and the rodless cavity of the first oil cylinder (8), the first oil outlet of the second valve core of the multi-way valve is connected with the oil tank, and the second oil outlet and the third oil outlet of the second valve core of the multi-way valve are respectively connected with the rodless cavity and the rod cavity of the second oil cylinder (6).
6. A dual pump merge control system according to claim 1, wherein: and a second oil outlet and a third oil outlet of the single-connection valve (13) are respectively connected with a rodless cavity and a rod cavity of the third oil cylinder (10).
7. A dual pump merge control system according to claim 1, wherein: the oil outlets of the first hydraulic pump (P1) and the second hydraulic pump (P2) are connected with overflow valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110704888.7A CN113323932A (en) | 2021-06-24 | 2021-06-24 | Double-pump confluence control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110704888.7A CN113323932A (en) | 2021-06-24 | 2021-06-24 | Double-pump confluence control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113323932A true CN113323932A (en) | 2021-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110704888.7A Pending CN113323932A (en) | 2021-06-24 | 2021-06-24 | Double-pump confluence control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113323932A (en) |
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2021
- 2021-06-24 CN CN202110704888.7A patent/CN113323932A/en active Pending
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