CN216343107U - Hydraulic system of loader - Google Patents
Hydraulic system of loader Download PDFInfo
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- CN216343107U CN216343107U CN202122390398.2U CN202122390398U CN216343107U CN 216343107 U CN216343107 U CN 216343107U CN 202122390398 U CN202122390398 U CN 202122390398U CN 216343107 U CN216343107 U CN 216343107U
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Abstract
The utility model discloses a hydraulic system of a loader, which comprises a manual reversing valve, an electromagnetic reversing valve, a controller, a rotating speed sensor and an air pressure sensor, wherein the manual reversing valve is arranged on the controller; the manual reversing valve is arranged on an oil inlet oil way between the hydraulic oil tank and the hydraulic oil cylinder, and the electromagnetic reversing valve is arranged on the oil inlet oil way between the hydraulic oil tank and an oil inlet of the manual reversing valve; the rotating speed sensor and the air pressure sensor are connected with the controller, and the controller is connected with the control end of the electromagnetic reversing valve; the rotation speed sensor is used for detecting the rotation speed of the engine, the air pressure sensor is used for detecting the atmospheric pressure, and the controller is configured to control the action of the electromagnetic directional valve according to the rotation speed of the engine and the atmospheric pressure. The loader hydraulic system provided by the embodiment can avoid the problem that the rotating speed of an engine cannot be adjusted in time when an actuating mechanism is controlled manually, so that the loader always works in a low-efficiency interval.
Description
Technical Field
The embodiment of the utility model relates to the technology of loaders, in particular to a hydraulic system of a loader.
Background
The loader is a kind of earth and stone construction machinery widely used in road, railway, building, water and electricity, port and mine, and is mainly used for shoveling and loading bulk materials such as soil, gravel, lime and coal, and also for light shoveling and digging of ore and hard soil.
With the increase of the altitude, the oxygen content is reduced, particularly, the air in plateau areas is thin, the atmospheric pressure is low, and as the domestic loader is generally provided with a turbocharged engine system, the rotating speed of the engine is related to the air inflow, when the loader works in the plateau areas, the lower rotating speed of the engine can cause the oxygen content to be too low, so that the fuel oil of the engine can not be fully combusted, and the loader further operates at lower working efficiency.
The hydraulic system in the existing loader usually adopts a manual control mode, and cannot automatically realize the control of the hydraulic system according to the working environment of the loader so as to ensure the working efficiency of the loader.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hydraulic system of a loader, which can achieve the aim of automatically controlling the hydraulic system according to the working environment so as to ensure the working efficiency of the loader.
The embodiment of the utility model provides a hydraulic system of a loader, which comprises a manual reversing valve, an electromagnetic reversing valve, a controller, a rotating speed sensor and an air pressure sensor, wherein the manual reversing valve is arranged on the controller;
the manual reversing valve is arranged on an oil inlet oil way between the hydraulic oil tank and the hydraulic oil cylinder, and the electromagnetic reversing valve is arranged on an oil inlet oil way between the hydraulic oil tank and an oil inlet of the manual reversing valve;
the rotating speed sensor and the air pressure sensor are connected with the controller, and the controller is connected with the control end of the electromagnetic directional valve;
the rotation speed sensor is used for detecting the rotation speed of the engine, the air pressure sensor is used for detecting the atmospheric pressure, and the controller is configured to control the action of the electromagnetic directional valve according to the rotation speed of the engine and the atmospheric pressure.
Furthermore, the manual reversing valve adopts a multi-path manual reversing valve;
and oil outlets of the multi-path manual reversing valves are connected with a specified hydraulic oil cylinder.
The controller is connected with the control end of the electromagnetic reversing valve through the relay;
the controller controls the action of the electromagnetic directional valve by controlling the relay.
Further, the device also comprises a relay controller;
the controller is connected with the relay through the relay controller, and the controller controls the action of the relay through the relay controller so as to control the action of the electromagnetic directional valve.
Furthermore, the hydraulic oil tank is provided with an oil pump, and the oil pump is used for enabling hydraulic oil in the hydraulic oil tank to enter an oil inlet oil way where the electromagnetic directional valve is located.
And the oil inlet of the overflow valve is connected with an oil inlet oil path between the hydraulic oil tank and the oil inlet of the electromagnetic directional valve.
The hydraulic oil cylinder is characterized by further comprising a filter, wherein the filter is arranged on an oil return oil path between the hydraulic oil cylinder and the hydraulic oil tank.
Furthermore, the hydraulic oil tank further comprises a one-way valve, the one-way valve is connected with the filter in parallel, and an oil outlet of the one-way valve is connected with the hydraulic oil tank.
Further, the electromagnetic directional valve is a normally closed electromagnetic directional valve, and the normally closed electromagnetic directional valve is in a normal state and cuts off an oil inlet oil path between the hydraulic oil tank and the hydraulic oil cylinder.
Further, the controller adopts an ECU controller.
Compared with the prior art, the utility model has the beneficial effects that: the loader hydraulic system that this embodiment provided includes hand-operated direction valve, solenoid directional valve, controller, speed sensor and baroceptor, and wherein, hand-operated direction valve sets up on the oil feed oil circuit between hydraulic tank and hydraulic cylinder, and the solenoid directional valve sets up on the oil feed oil circuit between hydraulic tank and hand-operated direction valve oil inlet, and overall structure is simple. In the loader hydraulic system provided by the embodiment, the manual reversing valve is used for cutting off, communicating and reversing an oil path in the hydraulic oil cylinder, the controller is used for controlling the electromagnetic reversing valve to act according to the engine speed acquired by the speed sensor and the atmospheric pressure acquired by the air pressure sensor, and further controlling the communication and the cutting off of the oil path input into the hydraulic oil cylinder.
Drawings
FIG. 1 is a block diagram of a hydraulic system of a loader in an embodiment;
fig. 2 is a schematic structural diagram of another loader hydraulic system in the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a block diagram of a hydraulic system of a loader in an embodiment, and referring to fig. 1, the hydraulic system of the loader includes a manual directional valve 1, an electromagnetic directional valve 2, a controller 3, a rotation speed sensor 4, and an air pressure sensor 5.
The manual reversing valve 1 is arranged on an oil inlet oil path between the hydraulic oil tank 100 and the hydraulic oil cylinder 200, and the electromagnetic reversing valve 2 is arranged on the oil inlet oil path between the hydraulic oil tank 100 and an oil inlet of the manual reversing valve 1.
The rotation speed sensor 4 and the air pressure sensor 5 are connected with a controller, and the controller 3 is connected with the control end of the electromagnetic directional valve 2.
The revolution speed sensor 4 is used for detecting the revolution speed of the engine, the air pressure sensor 5 is used for detecting the atmospheric pressure, and the controller 3 is configured to control the action of the electromagnetic directional valve 2 according to the revolution speed of the engine and the atmospheric pressure.
In the present embodiment, the hydraulic oil tank 100 stores hydraulic oil, the hydraulic oil cylinder 200 serves as a transmission between the engine and the actuator of the loader, and the hydraulic oil cylinder 200 transmits force, torque or torque to the actuator through the hydraulic oil.
In the present embodiment, for example, the electromagnetic directional valve 2 is used for cutting off or communicating an oil inlet path between the hydraulic oil tank 100 and the hydraulic oil cylinder 200, and when the oil inlet path between the hydraulic oil tank 100 and the hydraulic oil cylinder 200 is communicated, the manual directional valve 1 is used for cutting off, communicating or reversing an oil path in the hydraulic oil cylinder 200.
For example, in the present embodiment, the electromagnetic directional valve 2 is a controlled device, and the controller 3 controls the electromagnetic directional valve 2 to operate according to the rotation speed of the engine and the atmospheric pressure.
Illustratively, the atmospheric pressure and the oxygen content of the air have a certain relationship, and when the oxygen content of the air changes, the corresponding rotating speed of the engine is different when the engine outputs the same power;
when the flow of the hydraulic oil in the hydraulic oil cylinder is fixed, the actuating mechanism of the loader can work in a normal working efficiency range only when the output power of the engine reaches a certain value, so that when the oxygen content in the air changes, if the actuating mechanism can be in the normal working efficiency range, the rotating speed of the engine needs to be correspondingly changed.
In the present embodiment, the controller 3 controls the electromagnetic directional valve 2 in accordance with the engine speed and the atmospheric pressure to: when the rotating speed of the engine reaches a certain value, the oil way connected with the hydraulic oil cylinder 200 is communicated, and the situation that the loader works in an inefficient interval all the time to influence the operation progress is avoided.
The loader hydraulic system proposed in the present embodiment does not involve the improvement of the program, and the program preset in the controller 3 may be executed to implement:
acquiring atmospheric pressure detected by an atmospheric pressure sensor 5, and determining a preset rotating speed threshold value of the engine according to the current atmospheric pressure;
the engine rotating speed detected by the rotating speed sensor 4 is obtained, whether the engine rotating speed reaches a rotating speed threshold value or not is judged, and when the engine rotating speed reaches the rotating speed threshold value, the electromagnetic directional valve 2 is controlled to act so as to communicate an oil inlet oil way between the hydraulic oil tank 100 and the hydraulic oil cylinder 200.
The loader hydraulic system provided by the embodiment comprises a manual reversing valve, an electromagnetic reversing valve, a controller, a rotating speed sensor and an air pressure sensor, wherein the manual reversing valve is arranged on an oil inlet oil way between a hydraulic oil tank and a hydraulic oil cylinder, the electromagnetic reversing valve is arranged on the oil inlet oil way between the hydraulic oil tank and an oil inlet of the manual reversing valve, and the whole structure is simple;
in the loader hydraulic system provided by the embodiment, the manual reversing valve is used for cutting off, communicating and reversing an oil path in the hydraulic oil cylinder, the controller is used for controlling the electromagnetic reversing valve to act according to the engine speed acquired by the speed sensor and the atmospheric pressure acquired by the air pressure sensor, and further controlling the communication and the cutting off of the oil path input into the hydraulic oil cylinder.
Fig. 2 is a schematic structural diagram of another loader hydraulic system in an embodiment, and referring to fig. 2, as an implementation scheme, the loader hydraulic control system comprises a multi-way manual directional valve 11 and an electromagnetic directional valve 2.
The multi-path manual reversing valve 11 is arranged on an oil inlet oil path between the hydraulic oil tank 100 and the hydraulic oil cylinder 200, and the electromagnetic reversing valve 2 is arranged on the oil inlet oil path between the hydraulic oil tank 100 and an oil inlet of the multi-path manual reversing valve 11.
In the scheme, the multi-path manual reversing valve 11 is used for cutting off, communicating or reversing oil paths of different actuators on the loader.
Optionally, a plurality of hydraulic oil cylinders may be configured on the loader, oil outlets of the multiple manual directional control valves 11 are connected with designated hydraulic oil cylinders, and the multiple manual directional control valves 11 realize control of corresponding execution mechanisms by cutting off, communicating or reversing oil passages of one hydraulic oil cylinder.
Referring to fig. 2, in the present scheme, the hydraulic oil tank 100 is provided with an oil pump 101, and the oil pump 101 is used for making hydraulic oil in the hydraulic oil tank 100 enter an oil inlet oil path where the electromagnetic directional valve 2 is located at a certain pressure.
The hydraulic oil tank is characterized by further comprising an overflow valve 6, and an oil inlet of the overflow valve 6 is connected to an oil inlet oil path between the hydraulic oil tank 100 and an oil inlet of the electromagnetic directional valve 2.
Illustratively, an oil outlet of the overflow valve 6 may be connected to the hydraulic oil tank 100, and the overflow valve 6 is configured to, when the pressure at the oil inlet of the electromagnetic directional valve 2 is too high, introduce a portion of hydraulic oil back to the hydraulic oil tank 100, so as to ensure that the pressure at the oil inlet of the electromagnetic directional valve 2 is constant.
The hydraulic oil cylinder is characterized by further comprising a filter 7 and a one-way valve 8, wherein the filter 7 is arranged on an oil return oil path between the hydraulic oil cylinder 200 and the hydraulic oil tank 100, the one-way valve 8 is connected with the filter 7 in parallel, and an oil outlet of the one-way valve 8 is connected with the hydraulic oil tank 100.
Illustratively, the filter 7 is used for filtering the hydraulic oil flowing back to the hydraulic oil tank 100, and the check valve 8 is used for normally flowing back the hydraulic oil to the hydraulic oil tank 100 when the filter 7 is clogged.
Illustratively, in this scheme, the controller adopts an ECU controller, and correspondingly, the loader hydraulic system further includes a relay, the ECU controller is connected with the control end of the electromagnetic directional valve through the relay, and the ECU controller controls the electromagnetic directional valve 2 to act through the relay, so as to realize that the small voltage signal controls the electromagnetic directional valve 2 with large working voltage.
Optionally, the loader hydraulic system may further include a relay controller, and the ECU controller is connected to the relay through the relay controller.
For example, the ECU controller controls the relay to act through the relay controller to control the electromagnetic directional valve 2 to act, and by arranging the relay controller, the configuration content for the ECU controller can be reduced, and the design flow can be reduced.
Optionally, in this scheme, the electromagnetic directional valve 2 is a normally closed electromagnetic directional valve, and the normally closed electromagnetic directional valve cuts off the oil inlet passage between the hydraulic oil tank 100 and the hydraulic oil cylinder 200 in a normal state.
In this scheme, the ECU controller is connected with speed sensor and baroceptor, and the working process of ECU controller includes:
acquiring atmospheric pressure detected by an atmospheric pressure sensor, and determining a preset rotating speed threshold value of the engine according to the current atmospheric pressure;
the method comprises the steps of obtaining the rotating speed of an engine detected by a rotating speed sensor, judging whether the rotating speed of the engine reaches a rotating speed threshold value, and generating a control instruction when the rotating speed of the engine reaches the rotating speed threshold value;
the relay controller controls the relay to act according to the control instruction, and further controls the electromagnetic directional valve 2 to act so as to communicate an oil inlet channel between the hydraulic oil tank 100 and the hydraulic oil cylinder 200.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A hydraulic system of a loader is characterized by comprising a manual reversing valve, an electromagnetic reversing valve, a controller, a rotating speed sensor and an air pressure sensor;
the manual reversing valve is arranged on an oil inlet oil way between the hydraulic oil tank and the hydraulic oil cylinder, and the electromagnetic reversing valve is arranged on an oil inlet oil way between the hydraulic oil tank and an oil inlet of the manual reversing valve;
the rotating speed sensor and the air pressure sensor are connected with the controller, and the controller is connected with the control end of the electromagnetic directional valve;
the rotation speed sensor is used for detecting the rotation speed of the engine, the air pressure sensor is used for detecting the atmospheric pressure, and the controller is configured to control the action of the electromagnetic directional valve according to the rotation speed of the engine and the atmospheric pressure.
2. The loader hydraulic system of claim 1 wherein said manual directional control valve is a multi-way manual directional control valve;
and oil outlets of the multi-path manual reversing valves are connected with a specified hydraulic oil cylinder.
3. The loader hydraulic system of claim 1 further comprising a relay through which the controller is connected to a control end of the electromagnetic directional valve;
the controller controls the action of the electromagnetic directional valve by controlling the relay.
4. The loader hydraulic system of claim 3 further comprising a relay controller;
the controller is connected with the relay through the relay controller, and the controller controls the action of the relay through the relay controller so as to control the action of the electromagnetic directional valve.
5. The loader hydraulic system of claim 1 wherein the hydraulic reservoir is provided with an oil pump for admitting hydraulic oil from the hydraulic reservoir to an oil inlet passage in which the electromagnetic directional valve is located.
6. The hydraulic system of the loader according to claim 1 further comprising an overflow valve, wherein an oil inlet of the overflow valve is connected to an oil inlet path between the hydraulic oil tank and an oil inlet of the electromagnetic directional valve.
7. The loader hydraulic system of claim 1 further comprising a filter disposed on a return oil path between the hydraulic ram and the hydraulic tank.
8. The hydraulic system of the loader of claim 7 further comprising a check valve, said check valve being connected in parallel with said filter, an oil outlet of said check valve being connected to said hydraulic oil tank.
9. The hydraulic system of the loader according to claim 1 wherein the electromagnetic directional valve is a normally closed electromagnetic directional valve, and the normally closed electromagnetic directional valve is in a normal state to cut off an oil inlet passage between the hydraulic oil tank and the hydraulic oil cylinder.
10. The loader hydraulic system of claim 1 wherein said controller is an ECU controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122390398.2U CN216343107U (en) | 2021-09-29 | 2021-09-29 | Hydraulic system of loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122390398.2U CN216343107U (en) | 2021-09-29 | 2021-09-29 | Hydraulic system of loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216343107U true CN216343107U (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122390398.2U Active CN216343107U (en) | 2021-09-29 | 2021-09-29 | Hydraulic system of loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216343107U (en) |
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2021
- 2021-09-29 CN CN202122390398.2U patent/CN216343107U/en active Active
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