CN218717811U - Hydraulic control system and excavator with same - Google Patents
Hydraulic control system and excavator with same Download PDFInfo
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- CN218717811U CN218717811U CN202222985515.4U CN202222985515U CN218717811U CN 218717811 U CN218717811 U CN 218717811U CN 202222985515 U CN202222985515 U CN 202222985515U CN 218717811 U CN218717811 U CN 218717811U
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Abstract
The utility model provides a hydraulic control system and have its excavator, include: a first pump body and a second pump body; the bypass cut-off valve is communicated with the second pump body, the first pump body and the second pump body are both communicated with the reversing valve, the length of a pipeline between the second pump body and the reversing valve is greater than that between the first pump body and the reversing valve, and the oil cylinder is communicated with the reversing valve; the linear traveling valve and the bypass cut-off valve are both connected with the controller; when the first pump body provides oil to the oil cylinder through the reversing valve, a piston rod in the oil cylinder extends out, and the controller controls the bypass cut-off valve to be closed and controls the linear traveling valve to be opened according to the extension information of the piston rod, so that the oil output by the second pump body is converged with the oil flowing out of the first pump body after passing through the linear traveling valve and enters the oil cylinder. Through the utility model provides a technical scheme can solve the technical problem that has great pressure loss among the confluence in-process among the prior art.
Description
Technical Field
The utility model relates to a hydraulic control technical field particularly, relates to a hydraulic control system and have its excavator.
Background
At present, in a hydraulic system of a positive flow excavator in the prior art, by closing a bypass cut-off valve, the confluence of two pump bodies is realized to control the action of a bucket, so as to accelerate the speed of the single action of the bucket.
However, in the merging process of two pump bodies in the prior art, because the tube passes of the two pump bodies are different, the tube pass of one pump body is often too long, so that the pressure loss of the corresponding pump body is too large. Therefore, the efficiency of the hydraulic system is not improved when the bucket is in single action, and the oil consumption of the whole machine is increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a hydraulic control system and have its excavator to there is the technical problem of great pressure loss in the confluence in-process among the solution prior art.
In order to achieve the above object, the present invention provides a hydraulic control system, including:
a first pump body and a second pump body;
the pump comprises a linear walking valve, a bypass cut-off valve, a reversing valve, an oil cylinder and a controller, wherein a first pump body and a second pump body are communicated with the linear walking valve; the linear traveling valve and the bypass cut-off valve are both connected with the controller;
when the first pump body provides oil to the oil cylinder through the reversing valve, a piston rod in the oil cylinder extends out, and the controller controls the bypass cut-off valve to be closed and controls the linear traveling valve to be opened according to the extension information of the piston rod, so that the oil output by the second pump body is converged with the oil flowing out of the first pump body after passing through the linear traveling valve and enters the oil cylinder.
Further, the hydraulic control system further includes:
the detection piece is used for detecting the motion condition of the piston of the oil cylinder and is connected with the controller, so that the detection piece transmits the detected motion condition of the piston to the controller.
Further, the straight line walking valve is a two-position two-way reversing valve.
Furthermore, the reversing valve is a three-position four-way reversing valve.
Further, the hydraulic control system further includes:
the fluid import of the first pump body and the fluid import of the second pump body all communicate with the oil tank, the fluid export and the oil tank intercommunication of bypass trip valve.
Further, the hydraulic control system further includes:
and the check valve is arranged on a communication pipeline between the second pump body and the linear traveling valve, so that oil flowing out of the oil outlet of the second pump body flows to the linear traveling valve through the check valve.
Further, the hydraulic control system further includes:
one end of the first confluence branch is communicated with the first pump body, and the other end of the first confluence branch is communicated with the reversing valve;
one end of the second confluence branch is communicated with the second pump body, and the other end of the second confluence branch is communicated with the first confluence branch, so that the oil liquid flowing out of the second pump body is converged into the first confluence branch after passing through the second confluence branch;
the pipeline length of the first confluence branch is smaller than that of the second confluence branch.
Further, the hydraulic control system further includes:
and one end of the third flow combining branch is communicated with the linear walking valve, and the other end of the third flow combining branch is communicated with the first flow combining branch.
Further, the hydraulic control system further includes:
the oil inlet one-way valve is arranged on the first confluence branch, and is positioned between one end of the first confluence branch and a communication point of the first confluence branch and the second confluence branch; and/or the presence of a gas in the gas,
and the confluence one-way valve is arranged on the second confluence branch.
According to the utility model discloses an on the other hand provides an excavator, adopts the hydraulic control system that the aforesaid provided.
Use the technical scheme of the utility model, through the fluid with the output of the second pump body confluence with the fluid that the first pump body flows out behind sharp walking valve, like this, can reduce the direct confluence through longer pipeline of fluid of the output of the second pump body, the fluid that has also reduced the output of the second pump body causes great pressure loss problem when the one-way valve body structure on longer pipeline to the pressure loss of the fluid that has reduced the outflow of the second pump body improves hydraulic system efficiency, reduces the complete machine oil consumption.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the scope of the invention. In the drawings:
fig. 1 shows a schematic structural diagram of a hydraulic control system provided according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
1. a first pump body; 2. a second pump body; 3. a controller; 4. a bypass cut-off valve; 5. a confluence check valve; 6. a one-way valve; 7. a reversing valve; 8. an oil cylinder; 9. an oil inlet one-way valve; 10. a linear travel valve;
11. an oil tank;
12. a first converging branch; 13. a second converging branch; 14. and the third flow combining branch.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, an embodiment of the present invention provides a hydraulic control system, which includes: the pump comprises a first pump body 1, a second pump body 2, a linear traveling valve 10, a bypass cut-off valve 4, a reversing valve 7, an oil cylinder 8 and a controller 3, wherein the first pump body 1 and the second pump body 2 are both communicated with the linear traveling valve 10, the bypass cut-off valve 4 is communicated with the second pump body 2, the first pump body 1 and the second pump body 2 are both communicated with the reversing valve 7, the length of a pipeline between the second pump body 2 and the reversing valve 7 is greater than that between the first pump body 1 and the reversing valve 7, and the oil cylinder 8 is communicated with the reversing valve 7; the linear traveling valve 10 and the bypass cut-off valve 4 are both connected with the controller 3. When the first pump body 1 supplies oil to the oil cylinder 8 through the reversing valve 7, a piston rod in the oil cylinder 8 extends out, the controller 3 controls the bypass cut-off valve 4 to be closed and controls the linear traveling valve 10 to be opened according to the extension information of the piston rod, so that the oil output by the second pump body 2 is converged with the oil flowing out of the first pump body 1 through the linear traveling valve 10 and enters the oil cylinder 8.
Adopt the hydraulic control system that this embodiment provided, through the fluid with the output of the second pump body 2 behind the straight line walking valve 10 with the fluid of the 1 outflow of the first pump body confluence, like this, can reduce the direct pipeline through longer confluence of fluid of the output of the second pump body 2, the fluid that has also reduced the output of the second pump body 2 causes great pressure loss problem when the check valve body structure on the longer pipeline, thereby the pressure loss of the fluid of the 2 outflow of the second pump body has been reduced, hydraulic system efficiency is improved, the oil consumption of the complete machine is reduced.
Specifically, the confluence control of the single action of the bucket is realized through the confluence of the first pump body 1 and the second pump body 2, the efficiency of a hydraulic system is improved when the bucket is in the single action, and the oil consumption of the whole machine is reduced.
In this embodiment, the hydraulic control system further includes a detecting member for detecting the movement of the piston of the cylinder 8, and the detecting member is connected to the controller 3 so that the detecting member transmits the detected movement of the piston to the controller 3. By adopting the structure, the movement condition of the piston can be conveniently and accurately detected, so that the control precision of the controller 3 on the bypass cut-off valve 4 and the linear traveling valve 10 is improved, and the smooth proceeding of the corresponding flow is conveniently ensured.
Specifically, the straight traveling valve 10 in the present embodiment may be a two-position two-way selector valve.
In this embodiment, the selector valve 7 may be a three-position, four-way selector valve.
Specifically, hydraulic control system still includes oil tank 11, and the fluid import of the first pump body 1 and the fluid import of the second pump body 2 all communicate with oil tank 11, and the fluid export of bypass trip valve 4 communicates with oil tank 11. By adopting the structure, oil can be conveniently provided for the first pump body 1 and the second pump body 2 through the oil tank 11, and the oil of the bypass cut-off valve 4 can smoothly flow back to the oil tank 11.
In this embodiment, the hydraulic control system further includes a check valve 6, and the check valve 6 is disposed on a communication pipeline between the second pump body 2 and the linear traveling valve 10, so that the oil flowing out from the oil outlet of the second pump body 2 flows to the linear traveling valve 10 through the check valve 6.
Specifically, the hydraulic control system in the present embodiment further includes a first merging branch 12 and a second merging branch 13, one end of the first merging branch 12 communicates with the first pump body 1, and the other end of the first merging branch 12 communicates with the selector valve 7. One end of the second merging branch 13 communicates with the second pump body 2, and the other end of the second merging branch 13 communicates with the first merging branch 12, so that the oil flowing out of the second pump body 2 passes through the second merging branch 13 and then merges into the first merging branch 12. Wherein the length of the first merging branch 12 is smaller than the length of the second merging branch 13. Specifically, the length of the pipe of the second converging branch 13 corresponds to the length of the pipe between the second pump body 2 and the reversing valve 7, and the length of the pipe of the first converging branch 12 corresponds to the length of the pipe between the first pump body 1 and the reversing valve 7.
In this embodiment, the hydraulic control system further includes a third confluence branch 14, one end of the third confluence branch 14 is communicated with the straight traveling valve 10, and the other end of the third confluence branch 14 is communicated with the first confluence branch 12. By adopting the structure, the oil liquid flowing into the linear traveling valve 10 from the second pump body 2 can flow into the reversing valve 7 through the third confluence branch 14, so that the pressure loss caused by the long pipe stroke of the second confluence branch 13 is reduced.
Specifically, the hydraulic control system further comprises an oil inlet one-way valve 9, the oil inlet one-way valve 9 is arranged on the first confluence branch 12, and the oil inlet one-way valve 9 is located between one end of the first confluence branch 12 and a communication point of the first confluence branch 12 and the second confluence branch 13. Adopt such structure setting, can be through the flow direction of oil feed check valve 9 restriction fluid to make fluid can only flow to 7 in the switching-over valve.
In the present embodiment, the hydraulic control system further includes a confluence check valve 5, and the confluence check valve 5 is provided on the second confluence branch 13. With this arrangement, the pressure loss due to the merging check valve 5 on the second merging branch 13 is reduced by allowing the oil that has flowed into the straight traveling valve 10 from the second pump body 2 to flow into the selector valve 7 through the third merging branch 14.
The working principle in this embodiment is as follows: when the reversing valve 7 works at a left position, the first pump body 1 provides hydraulic oil for the action of the oil cylinder 8 through the oil inlet one-way valve 9 and the reversing valve 7, oil is returned from a large cavity of the oil cylinder 8 through an oil inlet small cavity, a piston rod stretches out, and meanwhile, when the controller 3 detects a stretching action instruction of the piston rod of the oil cylinder 8, the controller 3 controls the bypass cut-off valve 4, the electromagnet of the linear walking valve 10 is electrified, the bypass cut-off valve 4 and the linear walking valve 10 work at a right position, the hydraulic oil output by the second pump body 2 is closed through an oil return tank channel of the bypass cut-off valve 4, the hydraulic oil output by the second pump body 2 can only flow together through the confluence one-way valve 5 and the hydraulic oil output by the linear walking valve 10 and the first pump body 1 and enter the large cavity of the oil cylinder 8, so that the action speed of the piston rod of the oil cylinder 8 is improved.
The embodiment two of the utility model provides an excavator adopts the hydraulic control system that above-mentioned embodiment one provided.
It is to be noted that; the confluence refers to a working condition that the first pump body 1 and the second pump body 2 supply oil to a certain actuating mechanism at the same time. The straight traveling valve 10 functions as: when the crawler excavator walks and gets on the bus simultaneously, the bus can normally act. The bypass cut-off valve 4 has the functions of: the neutral position is unloaded in the standby state, and the confluence of the bucket or the standby single-action functional union is realized in the working state.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: when the pump is not in motion during walking, the linear walking valve 10 is opened to realize the confluence of the upper vehicle moving arm and the bucket rod single-motion first pump body 1 and the second pump body 2, and the linear walking valve 10 is opened and the bypass cut-off valve 4 is closed to realize the confluence of the bucket and the standby function first pump body 1 and the second pump body 2; by adopting the technical scheme of opening the linear traveling valve 10 to realize bucket confluence, the second pump body 2 is additionally provided with a confluence channel for realizing confluence by utilizing the linear traveling valve 10, the on-way pressure loss and the local pressure loss are reduced, and the pressure of the first pump body 1 and the pressure of the second pump body 2 are consistent through bench test and complete machine verification, so that the problem that the on-way pressure loss and the local pressure loss are large when the second pump body 2 is opened is solved, and the aim of efficiently saving energy of the complete machine is fulfilled.
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 application 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 one 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, it need not be discussed further in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown 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 … …" may include both orientations 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 protection of the present application is not to be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 hydraulic control system, comprising:
a first pump body (1) and a second pump body (2);
the pump comprises a straight line walking valve (10), a bypass cut-off valve (4), a reversing valve (7), an oil cylinder (8) and a controller (3), wherein the first pump body (1) and the second pump body (2) are communicated with the straight line walking valve (10), the bypass cut-off valve (4) is communicated with the second pump body (2), the first pump body (1) and the second pump body (2) are communicated with the reversing valve (7), the pipeline length between the second pump body (2) and the reversing valve (7) is larger than that between the first pump body (1) and the reversing valve (7), and the oil cylinder (8) is communicated with the reversing valve (7); the linear traveling valve (10) and the bypass cut-off valve (4) are both connected with the controller (3);
wherein, work as first pump body (1) passes through switching-over valve (7) to when hydro-cylinder (8) provided fluid, the piston rod in hydro-cylinder (8) stretches out, controller (3) basis is according to the information control that stretches out of piston rod bypass trip valve (4) are closed, are controlled sharp walking valve (10) are opened, so that by the fluid warp of second pump body (2) output with behind the sharp walking valve (10) with the fluid confluence entering that first pump body (1) flowed out in hydro-cylinder (8).
2. The hydraulic control system of claim 1, further comprising:
the detection piece is used for detecting the motion condition of the piston of the oil cylinder (8), and the detection piece is connected with the controller (3) so that the detection piece can transmit the detected motion condition of the piston to the controller (3).
3. The hydraulic control system of claim 1, wherein the straight travel valve (10) is a two-position, two-way reversing valve.
4. The hydraulic control system according to claim 1, characterized in that the reversing valve (7) is a three-position, four-way reversing valve.
5. The hydraulic control system of claim 1, further comprising:
oil tank (11), the fluid import of the first pump body (1) with the fluid import of the second pump body (2) all with oil tank (11) intercommunication, the fluid export of bypass trip valve (4) with oil tank (11) intercommunication.
6. The hydraulic control system of claim 1, further comprising:
the check valve (6) is arranged on the second pump body (2) and the communicating pipeline of the straight line walking valve (10), so that oil flowing out of the oil outlet of the second pump body (2) flows to the straight line walking valve (10) through the check valve (6).
7. The hydraulic control system of claim 1, further comprising:
a first confluence branch (12), one end of the first confluence branch (12) is communicated with the first pump body (1), and the other end of the first confluence branch (12) is communicated with the reversing valve (7);
a second merging branch (13), one end of the second merging branch (13) being communicated with the second pump body (2), and the other end of the second merging branch (13) being communicated with the first merging branch (12), so that the oil liquid flowing out of the second pump body (2) passes through the second merging branch (13) and then merges into the first merging branch (12);
wherein the length of the pipeline of the first confluence branch (12) is less than that of the second confluence branch (13).
8. The hydraulic control system of claim 7, further comprising:
one end of the third flow combining branch (14) is communicated with the linear traveling valve (10), and the other end of the third flow combining branch (14) is communicated with the first flow combining branch (12).
9. The hydraulic control system of claim 7, further comprising:
the oil inlet one-way valve (9) is arranged on the first confluence branch (12), and the oil inlet one-way valve (9) is positioned between one end of the first confluence branch (12) and a communication point of the first confluence branch (12) and the second confluence branch (13); and/or the presence of a gas in the gas,
and a confluence check valve (5) arranged on the second confluence branch (13).
10. An excavator characterized in that the hydraulic control system of any one of claims 1 to 9 is employed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222985515.4U CN218717811U (en) | 2022-11-09 | 2022-11-09 | Hydraulic control system and excavator with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222985515.4U CN218717811U (en) | 2022-11-09 | 2022-11-09 | Hydraulic control system and excavator with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218717811U true CN218717811U (en) | 2023-03-24 |
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ID=85613006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222985515.4U Active CN218717811U (en) | 2022-11-09 | 2022-11-09 | Hydraulic control system and excavator with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218717811U (en) |
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2022
- 2022-11-09 CN CN202222985515.4U patent/CN218717811U/en active Active
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