1. A control method for a land leveling mode of an energy storage excavator is characterized by comprising the following steps: the method comprises the following steps:

sending a command for entering a land leveling mode to a controller and an engine controller through an instrument;

after receiving the land leveling mode instruction, the controller outputs a fixed target current value to the proportional pressure reducing valve, and simultaneously sends a land leveling mode rotating speed value set by the engine to the engine controller through the CAN bus, and the engine controller outputs a signal to control the rotating speed of the engine to be fixed at the land leveling mode rotating speed value; the proportional pressure reducing valve reduces the pilot pressure for controlling the lifting of the movable arm, and further controls the lifting speed of the movable arm.

2. The method of claim 1, wherein the method comprises: and after receiving the flat ground mode instruction, the controller detects whether the actual current value of the proportional pressure reducing valve reaches the target current value or not by self, and outputs the target current value by calculation and adjustment if the actual current value is inconsistent with the target current value.

3. The control method for the grading mode of the energy storage excavator according to claim 1 or 2, wherein: and the engine controller receives the value from the engine speed sensor and compares the value with the set land leveling mode speed value, and if the value is not consistent with the set land leveling mode speed value, the engine controller continuously adjusts the engine speed to enable the actual engine speed value to reach the set land leveling mode speed value.

4. The utility model provides a control system of energy storage excavator level land mode which characterized in that: the system comprises a proportional pressure reducing valve, a power supply, a controller, a fuse, a starting switch, an instrument, an engine controller and a rotating speed sensor; the positive pole of the power supply is connected with a starting switch through a fuse, and the starting switch connects the power supply with the controller, the instrument and the engine controller; the instrument is connected with the controller and the engine controller; the controller is connected with the power supply cathode through a proportional pressure reducing valve, the engine controller is connected with the power supply cathode through a rotating speed sensor, and the rotating speed sensor is used for detecting the rotating speed of the engine.

5. The energy storage excavator land leveling mode control system of claim 4, wherein: the control system of the energy storage excavator in the flat ground mode further comprises a hydraulic handle, a movable arm oil cylinder I, a movable arm oil cylinder II and a multi-way valve; the hydraulic handle comprises an oil inlet, an oil return port and an oil outlet, the oil outlet of the hydraulic handle is connected with the proportional pressure reducing valve through a pipeline, pressure oil at the oil outlet of the hydraulic handle is reduced by the proportional pressure reducing valve and then is connected to the multi-way valve movable arm oil cylinder control valve core through the proportional pressure reducing valve, and the multi-way valve movable arm oil cylinder control valve core is communicated with the movable arm oil cylinder I and the movable arm oil cylinder II.

6. The energy storage excavator land leveling mode control system of claim 4 or 5, wherein: the working modes of the control system comprise a cyclic switching heavy-load mode, an economy mode and a land leveling mode.

7. The method of claim 6, wherein the method further comprises: the instrument is provided with a key, and the instrument is switched to a flat ground mode through the key.

8. The control method for land leveling mode of energy storage excavator according to claim 4 or 5 or 7, characterized by: the power supply is a storage battery.

9. The control method for land leveling mode of energy storage excavator according to claim 4 or 5 or 7, characterized by: the proportional pressure reducing valve is an electromagnetic proportional pressure reducing valve.

Background

At present, the energy storage excavator is more and more widely applied, and the excavator is widely applied to various working conditions such as mining, earthwork excavation, ground leveling and the like; the excavator is also known as a manipulator, can realize a plurality of operations with high difficulty, the more powerful the function of the excavator is, the higher the difficulty of the actual operation is, and the land leveling operation is the basis for examining the operation proficiency of the excavator. The land leveling work can be well finished only by simultaneously coordinating the movable arm, the bucket rod and the bucket; any small link cannot well finish the land leveling operation due to improper operation, which brings great trouble to the ordinary excavator hand in the land leveling operation. Particularly, the energy storage excavator is additionally provided with the energy storage oil cylinder, so that the lifting speed of the movable arm is high, the lifting controllability of the movable arm is slightly poorer than that of a common excavator, and the working difficulty of the energy storage excavator for finishing the land leveling operation is higher.

Disclosure of Invention

The invention aims to provide a control method and a control system for a land leveling mode of an energy storage excavator, which aim to solve the problem that the conventional energy storage excavator is difficult to finish the land leveling operation.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a control method for a land leveling mode of an energy storage excavator comprises the following steps:

sending a command for entering a land leveling mode to a controller and an engine controller through an instrument;

after receiving the land leveling mode instruction, the controller outputs a fixed target current value to the proportional pressure reducing valve, and simultaneously sends a land leveling mode rotating speed value set by the engine to the engine controller through the CAN bus, and the engine controller outputs a signal to control the rotating speed of the engine to be fixed at the land leveling mode rotating speed value; the proportional pressure reducing valve reduces the pilot pressure for controlling the lifting of the movable arm, and further controls the lifting speed of the movable arm.

And after receiving the flat ground mode instruction, the controller detects whether the actual current value of the proportional pressure reducing valve reaches the target current value or not by self, and outputs the target current value by calculation and adjustment if the actual current value is inconsistent with the target current value.

And the engine controller receives the value from the engine speed sensor and compares the value with the set land leveling mode speed value, and if the value is not consistent with the set land leveling mode speed value, the engine controller continuously adjusts the engine speed to enable the actual engine speed value to reach the set land leveling mode speed value.

The invention also provides another technical scheme:

a control system of an energy storage excavator in a land leveling mode comprises a proportional pressure reducing valve, a power supply, a controller, a fuse, a starting switch, an instrument, an engine controller and a rotating speed sensor; the positive pole of the power supply is connected with a starting switch through a fuse, and the starting switch connects the power supply with the controller, the instrument and the engine controller; the instrument is connected with the controller and the engine controller; the controller is connected with the power supply cathode through a proportional pressure reducing valve, the engine controller is connected with the power supply cathode through a rotating speed sensor, and the rotating speed sensor is used for detecting the rotating speed of the engine.

The control system of the energy storage excavator in the flat ground mode further comprises a hydraulic handle, a movable arm oil cylinder I, a movable arm oil cylinder II and a multi-way valve; the hydraulic handle comprises an oil inlet, an oil return port and an oil outlet, the oil outlet of the hydraulic handle is connected with the proportional pressure reducing valve through a pipeline, pressure oil at the oil outlet of the hydraulic handle is reduced by the proportional pressure reducing valve and then is connected to the multi-way valve movable arm oil cylinder control valve core through the proportional pressure reducing valve, and the multi-way valve movable arm oil cylinder control valve core is communicated with the movable arm oil cylinder I and the movable arm oil cylinder II.

The invention has the technical effects that:

compared with the prior art, the control method of the flat ground mode of the energy storage excavator directly switches to the flat ground mode through the key of the instrument, in the flat ground mode, the instrument sends a mode instruction to the controller, the controller sends a target rotating speed value of the engine to the engine controller, the engine controls the rotating speed of the engine to be stabilized at the target rotating speed value, meanwhile, the controller outputs a fixed current value to the electromagnetic proportional pressure reducing valve, the electromagnetic proportional pressure reducing valve controls the pilot pressure of the lifting of the movable arm, the lifting speed of the movable arm oil cylinder is further controlled, the flat ground mode of the energy storage excavator is easily achieved, and the labor intensity of an operator and the skill requirement on the excavator are reduced.

Drawings

FIG. 1 is a block diagram of the electrical structure of the present invention;

FIG. 2 is a block diagram of the hydraulic configuration of the present invention;

FIG. 3 is an electrical schematic of the present invention;

fig. 4 is a hydraulic schematic of the present invention.

In the figure, 1, a proportional pressure reducing valve; 2. a power source; 3. a controller; 4. a fuse; 5. starting a switch; 6. a meter; 7. an engine controller; 8. a rotational speed sensor; 9. a hydraulic handle; 10. a first movable arm oil cylinder; 11. a movable arm oil cylinder II; 12. a multiway valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

Example (b):

as shown in fig. 1 and 3, the control system for the land leveling mode of the energy storage excavator according to the present embodiment includes a proportional pressure reducing valve 1, a power supply 2, a controller 3, a fuse 4, a starting switch 5, a meter 6, an engine controller 7 and a rotation speed sensor 8; the positive pole of the power supply 2 is connected with a terminal B of a starting switch 5 through a fuse 4, when the starting switch 5 is in an ON position, the terminal B of the starting switch 5 is communicated with an ACC terminal, and the starting switch 5 is used for communicating the power supply 2 with a controller 3, an instrument 6 and an engine controller 7; the instrument 6 is connected with the controller 3 and the engine controller 7; the controller 3 is connected with the cathode of the power supply 2 through the proportional pressure reducing valve 1, the engine controller 7 is connected with the cathode of the power supply 2 through the rotating speed sensor 8, and the rotating speed sensor 8 is used for detecting the rotating speed of the engine.

As shown in fig. 2 and 4, the control system for the land leveling mode of the energy storage excavator further comprises a hydraulic handle 9, a first boom cylinder 10, a second boom cylinder 11 and a multi-way valve 12; the hydraulic handle 9 comprises an oil inlet P1 port, an oil return port T1 port and an oil outlet A1 port, the A1 port of the hydraulic handle 9 is connected with the P2 port of the proportional pressure reducing valve 1 through a pipeline, after the hydraulic handle 9 is broken to the maximum stroke, pressure oil at the A1 port of the hydraulic handle 9 is reduced in pressure through the proportional pressure reducing valve 1 and is connected to the A end of the boom cylinder control valve core of the multi-way valve 12 through the A2 port of the proportional pressure reducing valve 1, and the boom cylinder control valve core of the multi-way valve 12 is communicated with the boom cylinder I10 and the boom cylinder II 11.

As shown in fig. 3, the meter 6 is provided with an F5 button, and the F5 button is switched to the flat ground mode for easy operation, but the mode is not limited to the button mode.

The working modes of the control system comprise a cyclic switching heavy-load mode, an economic mode, a land leveling mode and the like, preferably, the mode when the excavator is started is defaulted to the economic mode, and when the mode is switched to the land leveling mode, the excavator enters the land leveling mode for control.

The power supply 2 is a storage battery; the proportional pressure reducing valve 1 is an electromagnetic proportional pressure reducing valve.

In this embodiment, based on the control system for the energy storage excavator in the land leveling mode, the control method for realizing the land leveling mode includes:

as shown in fig. 1-4, meter 6 sends a land leveling mode command to controller 3 and engine controller 7 via CAN buses CAN + and CAN-by switching the F5 button of meter 6 to land leveling mode. When the controller 3 receives the ground leveling mode command, the target current value M is output to the electromagnetic proportional pressure reducing valve through the PWM output port, and the controller 3 self-detects whether the actual current M1 of the electromagnetic proportional pressure reducing valve reaches the target value M through the PWM port, and adjusts the output current M by calculation if the actual current M1 is not consistent with the target value M. At the same time, the controller 3 sets the engine speed to the rotation speed N of the land leveling mode, the controller 3 sends the rotation speed setting value N to the engine controller 7, and the engine controller 7 controls the engine speed to N. The engine controller 7 receives the value N1 from the rotation speed sensor 8, compares the value with the set value N, and if the set value N is inconsistent with the actual value N1, the engine controller 7 continues to adjust the rotation speed of the engine to enable the actual rotation speed value N1 of the engine to reach the set value N;

after a hydraulic handle 9 for controlling the lifting of the movable arm is broken to the maximum stroke, pressure oil at an A1 port of the hydraulic handle 9 is decompressed through an electromagnetic proportional pressure reducing valve 13, and is connected to an A end of a movable arm cylinder control valve core of a multi-way valve 12 through an A2 port of the electromagnetic proportional pressure reducing valve 13, the movable arm cylinder control valve core of the multi-way valve 12 is pushed, hydraulic oil at a P3 port enters large cavities of a movable arm cylinder I10 and a movable arm cylinder II 11 through the multi-way valve, and the movable arm is lifted according to a set speed.

The fixed current value M output by the proportional pressure reducing valve by the controller can be set through an instrument menu, and a more appropriate current value is adjusted according to different vehicle types and different proportional pressure reducing valves, so that the lifting speed of the moving arm and the recovery speed of the bucket rod are matched to the optimal position, and the control method of the flat ground mode is ensured to be universally applicable to various machine types.

The invention can control the lifting speed of the movable arm to be optimally matched with the speed of the bucket rod to be recovered, so that the handle for controlling the recovery of the bucket rod and the handle for controlling the lifting of the movable arm are broken to the maximum stroke under the condition that the bucket is not moved, and the bucket is divided into a plane from front to back.