CN216518909U - Machine hydraulic system - Google Patents
Machine hydraulic system Download PDFInfo
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- CN216518909U CN216518909U CN202123117349.8U CN202123117349U CN216518909U CN 216518909 U CN216518909 U CN 216518909U CN 202123117349 U CN202123117349 U CN 202123117349U CN 216518909 U CN216518909 U CN 216518909U
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Abstract
The utility model relates to a machine hydraulic system, which belongs to the technical field of engineering machinery and comprises: a hydraulic oil tank; the hydraulic pump is communicated with the hydraulic oil tank; a motor for driving the device in motion; a control valve in communication with the motor; the main valve is used for controlling a hydraulic system of the whole machine; and the shuttle valve is respectively connected with the hydraulic pump, the control valve and the main valve and used for comparing the outlet pressure of the control valve with the signal pressure of the main valve and feeding back the greater of the outlet pressure and the signal pressure to the hydraulic pump. The priority valve is respectively connected with the hydraulic pump, the control valve and the main valve and is used for controlling the hydraulic pump to supply oil to the motor and the main valve; wherein oil supplied from the hydraulic pump is preferentially flowed to the motor by the priority valve. The utility model can realize that the oil liquid of the hydraulic pump is distributed to the motor at a certain flow preferentially, and the redundant flow flows to the main valve, thereby avoiding the mutual influence of two hydraulic systems.
Description
Technical Field
The utility model relates to a machine hydraulic system, and belongs to the technical field of engineering machinery.
Background
Engineering machinery is more and more widely applied and has more and more functions, and different machines and tools are often equipped, so that different machine and tool hydraulic systems are needed to complete the function of driving a certain part.
In order to improve the fuel economy of the whole machine, engineering machinery increasingly adopts a variable pump as a hydraulic oil source. In order to simplify the system and reduce the cost, the machine hydraulic system generally does not adopt complex feedback control, but if a quantitative pump source is added on the whole machine, the whole system becomes complex, and the original whole machine hydraulic system is changed too much, so that the universality of system elements is reduced, and the difficulty of production and manufacturing is increased. If the original complete machine hydraulic pump source is used, the mutual influence of the machine hydraulic pressure and the original hydraulic system is required to be avoided.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a machine hydraulic system which is small in change of the original whole machine hydraulic system and can avoid the mutual influence of the original hydraulic system and the machine hydraulic system.
In order to achieve the technical problem, the utility model is realized by adopting the following technical scheme:
the utility model provides a machine hydraulic system, comprising:
a hydraulic oil tank;
the hydraulic pump is communicated with the hydraulic oil tank;
a motor for driving the device in motion;
a control valve in communication with the motor;
the main valve is used for controlling the hydraulic system of the whole machine;
and the shuttle valve is respectively connected with the hydraulic pump, the control valve and the main valve and used for comparing the outlet pressure of the control valve with the signal pressure of the main valve and feeding back the greater of the outlet pressure and the signal pressure to the hydraulic pump.
The priority valve is respectively connected with the hydraulic pump, the control valve and the main valve and is used for controlling the hydraulic pump to supply oil to the motor and the main valve;
wherein oil supplied from the hydraulic pump is preferentially flowed to the motor by the priority valve.
Further, the control valve is provided with an oil inlet P2, an oil outlet A and an oil return port T, the oil inlet P2 of the control valve is communicated with the oil outlet CF of the priority valve, the oil outlet A of the control valve is communicated with the oil inlet of the motor, and the oil return port T of the control valve is communicated with the oil outlet of the hydraulic oil tank;
when the control valve is in an upper position, an oil return port T of the control valve is communicated with an oil outlet A of the control valve, and an oil inlet P2 of the control valve is disconnected with the oil outlet A of the control valve;
when the control valve is in the lower position, the oil inlet P2 of the control valve is communicated with the oil outlet A of the control valve, and the oil return port T of the control valve is disconnected with the oil outlet A of the control valve.
Further, the shuttle valve is provided with a first oil inlet, a second oil inlet and an oil outlet, the first oil inlet of the shuttle valve is communicated with the oil outlet A of the control valve, the second oil inlet of the shuttle valve is communicated with the signal feedback oil port of the main valve, and the oil outlet of the shuttle valve is communicated with the control port of the hydraulic pump.
Further, the priority valve is provided with an oil inlet P1, an oil outlet CF, an oil outlet EF, an oil return port L and a control oil port LS, the oil inlet P1 of the priority valve is communicated with the oil outlet of the hydraulic pump, the oil outlet CF of the priority valve is communicated with the oil inlet P2 of the control valve, the oil outlet EF of the priority valve is communicated with the oil inlet of the main valve, the oil return port L of the priority valve is communicated with the oil outlet of the hydraulic oil tank, and the control oil port LS of the priority valve is communicated with the oil outlet A of the control valve;
when the priority valve is in the left position, the oil inlet P1 of the priority valve is communicated with the oil outlet CF of the priority valve;
when the priority valve is in the right position, the oil inlet P1 of the priority valve is communicated with the oil outlet EF of the priority valve;
when the priority valve is in the neutral position, the oil inlet P1 of the priority valve is in communication with both the oil outlet CF of the priority valve and the oil outlet EF of the priority valve.
Further, the priority valve is provided with a left control end and a right control end, one end of an oil outlet CF of the priority valve is communicated with the left control end of the priority valve, and the other end of the oil outlet CF of the priority valve is communicated with the right control end of the priority valve; and an oil outlet A of the control valve is communicated with the right control end of the priority valve.
Further, a first damper is installed in an oil path communicated between the oil outlet CF of the priority valve and the left control end of the priority valve, a second damper is installed in an oil path communicated between the oil outlet CF of the priority valve and the right control end of the priority valve, and a third damper is installed in an oil path communicated between the oil outlet A of the control valve and the right control end of the priority valve.
Furthermore, an adjustable overflow valve is installed in an oil way through which the right control end of the priority valve is communicated with the oil return port L of the priority valve.
Further, the control valve is an electromagnetic control solenoid valve.
Further, the control valve is a mechanically controlled manual valve.
Further, the control valve is a pilot-controlled pilot valve.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, the outlet pressure of the control valve is fed back to the control oil port of the priority valve to control the working position of the priority valve, so that the oil liquid of the hydraulic pump is distributed to the motor at a certain flow rate preferentially, and redundant flow flows to the main valve, thereby avoiding the mutual influence of two hydraulic systems; the utility model only adds the priority valve between the hydraulic pump and the main valve on the basis of the original hydraulic system, and connects the feedback signal of the main valve and the outlet pressure of the control valve to the hydraulic pump through the shuttle valve, so the change is small, and the system elements have good universality; the utility model keeps the control of the variable pump in the original system and has energy-saving property.
Drawings
FIG. 1 is a schematic diagram of an implement hydraulic system provided in the present example;
in the figure: 1: a hydraulic oil tank; 2: a hydraulic pump; 3: a priority valve; 4: a control valve; 5: a main valve; 6: a motor; 7: a shuttle valve.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1, the present embodiment provides a machine hydraulic system, which includes a hydraulic oil tank 1, a hydraulic pump 2, a priority valve 3, a control valve 4, a main valve 5, a motor 6, and a shuttle valve 7, wherein the hydraulic oil tank 1 is used for storing oil, an oil outlet of the hydraulic oil tank 1 is connected to an oil inlet of the hydraulic pump 2, and the hydraulic pump 2 can supply the oil in the hydraulic oil tank 1 to the outside.
The oil outlet of the hydraulic pump 2 is communicated with the oil inlet of the priority valve 3, the oil outlet of the priority valve 3 is respectively connected with the oil inlet of the control valve 4 and the oil inlet of the main valve 5, and the priority valve 3 can control the hydraulic pump 2 to supply oil to the control valve 4 and the main valve 5.
An oil outlet of the control valve 4 is communicated with an oil inlet of the motor 6, the control valve 4 can control the starting and stopping of the motor 6 through the on-off of the control valve 4, the motor 6 is used for driving equipment to move, and the main valve 5 is used for controlling a hydraulic system of the whole machine.
Specifically, the control valve 4 has an oil inlet P2, an oil outlet a and an oil return port T, the oil inlet P2 of the control valve 4 is communicated with the oil outlet CF of the priority valve 3, the oil outlet a of the control valve 4 is communicated with the oil inlet of the motor 6, and the oil return port T of the control valve 4 is communicated with the oil outlet of the hydraulic oil tank 1.
The control valve 4 has an upper position and a lower position, when the control valve 4 is in the upper position, the oil return port T of the control valve 4 is communicated with the oil outlet a of the control valve 4, the oil inlet P2 of the control valve 4 is disconnected with the oil outlet a of the control valve 4, that is, when the control valve 4 is in the valve position alone, the oil in the oil outlet CF of the priority valve 3 is blocked at the oil inlet P2 of the control valve 4, and cannot reach the motor 6, and at this time, the motor 6 stops the driving device from moving.
When the control valve 4 is in the lower position, the oil inlet P2 of the control valve 4 is communicated with the oil outlet a of the control valve 4, and the oil return port T of the control valve 4 is disconnected from the oil outlet a of the control valve 4, that is, when the control valve 4 is in the valve position alone, the oil in the oil outlet CF of the priority valve 3 smoothly reaches the motor 6 through the oil inlet P2 of the control valve 4, and at this time, the motor 6 drives the equipment to move.
In this embodiment, the shuttle valve 7 has a first oil inlet, a second oil inlet and an oil outlet, the first oil inlet of the shuttle valve 7 is communicated with the oil outlet a of the control valve 4, the second oil inlet of the shuttle valve 7 is communicated with the signal feedback oil port of the main valve 5, and the oil outlet of the shuttle valve 7 is communicated with the control port of the hydraulic pump 2.
Specifically, the outlet pressure of the control valve 4 is provided to the shuttle valve 7, the main valve 5 feeds back a pressure signal to the shuttle valve 7, and after the shuttle valve 7 compares the outlet pressure of the control valve 4 with the signal pressure of the main valve 5, the shuttle valve 7 outputs a larger value to the hydraulic pump 2, so that the hydraulic pump 2 outputs a corresponding flow rate according to a larger demand of the two systems.
In this embodiment, the priority valve 3 has an oil inlet P1, an oil outlet CF, an oil outlet EF, an oil return port L, and a control oil port LS, the oil inlet P1 of the priority valve 3 is communicated with the oil outlet of the hydraulic pump 2, the oil outlet CF of the priority valve 3 is communicated with the oil inlet P2 of the control valve 4, the oil outlet EF of the priority valve 3 is communicated with the oil inlet of the main valve 5, the oil return port L of the priority valve 3 is communicated with the oil outlet of the hydraulic oil tank 1, and the control oil port LS of the priority valve 3 is communicated with the oil outlet a of the control valve 4.
In the present embodiment, the priority valve 3 has a left control end and a right control end, one end of the oil outlet CF of the priority valve 3 is communicated with the left control end of the priority valve 3, and the other end is communicated with the right control end of the priority valve 3; the oil outlet A of the control valve 4 is communicated with the right control end of the priority valve 3.
In this embodiment, a first damper is installed in an oil path through which the oil outlet CF of the priority valve 3 communicates with the left control end of the priority valve 3, a second damper is installed in an oil path through which the oil outlet CF of the priority valve 3 communicates with the right control end of the priority valve 3, and a third damper is installed in an oil path through which the oil outlet a of the control valve 4 communicates with the right control end of the priority valve 3.
In this embodiment, an adjustable overflow valve is installed in an oil path through which the right control end of the priority valve 3 is communicated with the oil return port L of the priority valve 3, excess oil flowing into the priority valve 3 through the control oil port LS of the priority valve 3 drives the overflow valve to be conducted, and the excess oil flows back to the hydraulic oil tank 1 through the overflow valve and the oil return port L of the priority valve 3, so that overflow unloading is achieved.
In this embodiment, after the oil supplied by the hydraulic pump 2 flows into the priority valve 3, the oil may respectively flow into the motor 6 through the oil outlet CF of the priority valve 3 and flow into the main valve 5 through the oil outlet EF of the priority valve 3, wherein when the oil inlet P1 of the priority valve 3 is simultaneously communicated with the oil outlet CF of the priority valve 3 and the oil outlet EF of the priority valve 3, the oil supplied by the hydraulic pump 2 may preferentially flow to the motor 6 under the action of the priority valve 3, so as to preferentially meet the requirements on the oil pressure and the oil flow.
In particular, the priority valve 3 has a left position, a right position and a middle position:
when the priority valve 3 is in the left position, the oil inlet P1 of the priority valve 3 is communicated with the oil outlet CF of the priority valve 3, and the oil supplied by the hydraulic pump 2 flows to the control valve 4 through the priority valve 3 and supplies oil to the motor 6 through the control valve 4.
When the priority valve 3 is in the right position, the oil inlet P1 of the priority valve 3 is communicated with the oil outlet EF of the priority valve 3, and the oil supplied by the hydraulic pump 2 flows to the main valve 5 through the priority valve 3 to supply the oil to the main valve 5.
When the priority valve 3 is in the neutral position, the oil inlet P1 of the priority valve 3 is simultaneously communicated with the oil outlet CF of the priority valve 3 and the oil outlet EF of the priority valve 3, the oil supplied by the hydraulic pump 2 preferentially flows to the motor 6 under the action of the priority valve 3, and the rest of the oil flows into the main valve 5 again.
In the present embodiment, the control valve 4 may be an electromagnetic control solenoid valve, or may be replaced by a mechanical control manual valve, or may be replaced by a pilot control pilot valve.
The machines hydraulic system that this embodiment provided can be when a plurality of systems simultaneous operation, and the demand of 6 to hydraulic pressure power of motor and flow is satisfied to the priority to improve the fuel feeding efficiency to motor 6, accelerate hydraulic pump 2's response speed, be favorable to improving the efficiency of construction, be favorable to the energy saving simultaneously.
The working principle of the embodiment is as follows:
when the whole machine is started without action, the control valve 4 is powered off and is positioned at an upper position, in the valve position state, the oil inlet P2 of the control valve 4 is disconnected with the oil outlet A, and the oil return port T of the control valve 4 is communicated with the oil outlet A.
That is, when the control valve 4 is in this valve position, the oil in the oil outlet CF of the priority valve 3 is blocked from the oil inlet P2 of the control valve 4 and cannot reach the motor 6, and the control oil port LS of the priority valve 3 is communicated with the oil return port T of the control valve 4 through the oil outlet a of the control valve 4, that is, the hydraulic oil tank 11 is communicated.
The oil outlet A of the control valve 4 is communicated with oil in the first oil inlet of the shuttle valve 7, and is communicated with the oil return port T of the control valve 4 through the oil outlet A of the control valve 4, namely, the hydraulic oil tank 11 is communicated.
At the beginning of the start of the whole machine, the priority valve 3 is positioned at the right position under the action of the return spring, under the state of the valve position, oil output by the hydraulic pump 2 flows out of the oil outlet CF through the oil inlet P1 of the priority valve 3, meanwhile, the pressure of the oil outlet CF is transmitted to two ends of the priority valve 3, wherein the pressure at the spring end of the valve core is the pressure of the oil outlet CF after the oil pressure of the oil outlet CF is reduced through internal damping, and the pressure at the other end of the valve core is the pressure of the oil outlet CF.
Because the oil inlet P2 of the control valve 4 is closed, the pressure difference between the two ends of the valve core of the priority valve 3 is increased along with the gradual increase of the pressure until the force of the reset spring of the valve core is overcome, the valve core is reversed to the left position, the oil inlet P1 of the priority valve 3 is communicated with the oil outlet EF, and the oil supplied by the hydraulic pump 2 flows to the main valve 5.
If the main valve 5 is not operated, the signal feedback port of the main valve 5 does not feed back a pressure signal to the shuttle valve 7, and the shuttle valve 7 does not feed back to the control port of the hydraulic pump 2, and the hydraulic pump 2 is in a standby state.
When the main valve 5 is operated, the signal feedback oil port of the main valve 5 feeds back a pressure signal to the shuttle valve 7, the shuttle valve 7 feeds back to the control port of the hydraulic pump 2, and the hydraulic pump 2 outputs corresponding flow according to the feedback of the main valve 5, so that the normal work of the original hydraulic system is not influenced by the machine tool hydraulic system at the moment.
When the whole machine is started, the control valve 4 is connected, the control valve 4 works in the lower position, in the valve position state, the oil inlet P2 of the control valve 4 is communicated with the oil outlet A, and the oil return port T of the control valve 4 is disconnected with the oil outlet A.
That is, the oil outlet CF of the priority valve 3 is communicated with the motor 6 through the control valve 4, the control oil port LS of the priority valve 3 is not communicated with the hydraulic oil tank 1, the oil outlet a of the control valve 4 is communicated with the oil in the first oil inlet of the shuttle valve 7, and the oil outlet of the shuttle valve 7 is communicated with the control port of the hydraulic pump 2.
The pressure difference between two ends of the valve core of the priority valve 3 is reduced along with the increase of the pressure of the control oil port LS, meanwhile, under the action of the return spring, the valve core of the priority valve 3 moves to the right, oil output by the hydraulic pump 2 preferentially flows to the motor 6 through the oil outlet CF of the priority valve 3, and the rest oil flows to the main valve 5 through the oil outlet EF of the priority valve 3.
When oil flows through the control valve 4, pressure drop is generated, so that a certain pressure difference exists between the pressure fed back to the control port LS of the priority valve 3 from the outlet of the control valve 4 and the pressure at the oil outlet CF of the priority valve 3, the larger the flow passing through the control valve 4 is, the larger the pressure difference is, until the pressure difference just meets the balance requirements at two ends of the valve core of the priority valve 3, the valve core of the priority valve 3 does not move any more, and the stable flow flowing to the motor 6 is ensured.
If the main valve 5 is not operated, the outlet pressure of the control valve 4 is fed back to the control port of the hydraulic pump 2 through the shuttle valve 7, so that the hydraulic pump 2 outputs the corresponding flow according to the requirement of the hydraulic system of the machine tool without redundant energy loss.
If the main valve 5 is manipulated, the oil outlet a of the control valve 4 is communicated with the first oil inlet of the shuttle valve 7, the signal feedback oil port of the main valve 5 is communicated with the second oil inlet of the shuttle valve 7, the control valve 4 feeds back the outlet pressure to the shuttle valve 7, the main valve 5 feeds back a pressure signal to the shuttle valve 7, after the shuttle valve 7 compares the outlet pressure of the control valve 4 with the signal pressure of the main valve 5, the shuttle valve 7 outputs a larger value to the control port of the hydraulic pump 2 through the oil outlet of the shuttle valve 7, so that the hydraulic pump 2 outputs a corresponding flow according to a larger required value in the control valve 4 and the main valve 5.
The oil liquid supplied by the hydraulic pump 2 preferentially meets the flow of the hydraulic system of the machine tool under the action of the priority valve 3, the rest flow flows to the original hydraulic system, and the pressure of the oil outlet EF of the priority valve 3 does not control the position of the valve core of the priority valve 3, so the working pressure of the original hydraulic system is high or low, and the flow flowing to the hydraulic system of the machine tool is not influenced, therefore, the two systems can work simultaneously without mutual influence.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An implement hydraulic system, comprising:
a hydraulic oil tank (1);
the hydraulic pump (2) is communicated with the hydraulic oil tank (1);
a motor (6) for driving the device in motion;
a control valve (4) in communication with the motor (6);
the main valve (5) is used for controlling a hydraulic system of the whole machine;
a shuttle valve (7) respectively connected to the hydraulic pump (2), the control valve (4) and the main valve (5) for comparing an outlet pressure of the control valve (4) with a signal pressure of the main valve (5) and feeding back the greater of the outlet pressures to the hydraulic pump (2);
a priority valve (3) respectively connected to the hydraulic pump (2), the control valve (4) and the main valve (5) for controlling the hydraulic pump (2) to supply oil to the motor (6) and the main valve (5);
wherein the oil supplied by the hydraulic pump (2) flows preferentially to the motor (6) under the action of the priority valve (3).
2. Implement hydraulic system according to claim 1, characterized in that said control valve (4) has an oil inlet P2, an oil outlet a and an oil return T, the oil inlet P2 of said control valve (4) communicating with the oil outlet CF of said priority valve (3), the oil outlet a of said control valve (4) communicating with the oil inlet of said motor (6), the oil return T of said control valve (4) communicating with the oil outlet of said hydraulic tank (1);
when the control valve (4) is in an upper position, an oil return port T of the control valve (4) is communicated with an oil outlet A of the control valve (4), and an oil inlet P2 of the control valve (4) is disconnected with the oil outlet A of the control valve (4);
when the control valve (4) is in the lower position, the oil inlet P2 of the control valve (4) is communicated with the oil outlet A of the control valve (4), and the oil return port T of the control valve (4) is disconnected with the oil outlet A of the control valve (4).
3. The implement hydraulic system of claim 1, wherein the shuttle valve (7) has a first oil inlet, a second oil inlet and an oil outlet, the first oil inlet of the shuttle valve (7) is in communication with the oil outlet a of the control valve (4), the second oil inlet of the shuttle valve (7) is in communication with the signal feedback oil port of the main valve (5), and the oil outlet of the shuttle valve (7) is in communication with the control port of the hydraulic pump (2).
4. The implement hydraulic system according to claim 1, characterized in that said priority valve (3) has an oil inlet P1, an oil outlet CF, an oil outlet EF, an oil return L and a control oil port LS, the oil inlet P1 of said priority valve (3) communicates with the oil outlet of said hydraulic pump (2), the oil outlet CF of said priority valve (3) communicates with the oil inlet P2 of said control valve (4), the oil outlet EF of said priority valve (3) communicates with the oil inlet of said main valve (5), the oil return L of said priority valve (3) communicates with the oil outlet of said hydraulic oil tank (1), the control oil port LS of said priority valve (3) communicates with the oil outlet a of said control valve (4);
when the priority valve (3) is in the left position, the oil inlet P1 of the priority valve (3) is communicated with the oil outlet CF of the priority valve (3);
when the priority valve (3) is in the right position, the oil inlet P1 of the priority valve (3) is communicated with the oil outlet EF of the priority valve (3);
when the priority valve (3) is in the neutral position, the oil inlet P1 of the priority valve (3) is communicated with the oil outlet CF of the priority valve (3) and the oil outlet EF of the priority valve (3) simultaneously.
5. Implement hydraulic system according to claim 1, characterized in that the priority valve (3) has a left control end and a right control end, the oil outlet CF of the priority valve (3) communicating with the left control end of the priority valve (3) at one end and with the right control end of the priority valve (3) at the other end; an oil outlet A of the control valve (4) is communicated with the right control end of the priority valve (3).
6. An implement hydraulic system according to claim 5, characterized in that a first damping is installed in the oil path where the oil outlet CF of the priority valve (3) communicates with the left control end of the priority valve (3), a second damping is installed in the oil path where the oil outlet CF of the priority valve (3) communicates with the right control end of the priority valve (3), and a third damping is installed in the oil path where the oil outlet A of the control valve (4) communicates with the right control end of the priority valve (3).
7. An implement hydraulic system according to claim 6, characterized in that an adjustable relief valve is installed in the oil path where the right control end of the priority valve (3) communicates with the oil return port L of the priority valve (3).
8. Implement hydraulic system according to claim 1, characterized in that the control valve (4) is an electromagnetically controlled solenoid valve.
9. Implement hydraulic system according to claim 1, characterized in that the control valve (4) is a mechanically controlled manual valve.
10. Implement hydraulic system according to claim 1, characterized in that the control valve (4) is a pilot controlled pilot valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123117349.8U CN216518909U (en) | 2021-12-13 | 2021-12-13 | Machine hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123117349.8U CN216518909U (en) | 2021-12-13 | 2021-12-13 | Machine hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216518909U true CN216518909U (en) | 2022-05-13 |
Family
ID=81469848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123117349.8U Active CN216518909U (en) | 2021-12-13 | 2021-12-13 | Machine hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216518909U (en) |
-
2021
- 2021-12-13 CN CN202123117349.8U patent/CN216518909U/en active Active
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