阅读说明：本技术 挖掘机节能控制系统 (Energy-saving control system of excavator ) 是由 董志强 董竞仪 于 2019-10-25 设计创作，主要内容包括：本发明涉及一种动臂尾部设有重力抵消配重的挖掘机节能控制系统。包括挖掘机状态检测组件、控制器、液压节能调节装置,液压节能调节装置包括动臂油缸卸载控制阀、配重位置调节油缸控制阀,动臂油缸卸载控制阀连接动作臂油缸油路,配重位置调节油缸控制阀输出端连接配重位置调节油缸,配重位置调节油缸控制阀输入端连接挖掘机液压主压力油路与回油路,控制器的控制信号输出端与动臂油缸卸载控制阀、配重位置调节油缸控制阀电连接。本发明安全性高,维护成本低,易于实现自动化控制,能够满足动臂机构提升及下降的全工况节能需求,且节能效果明显。(The invention relates to an excavator energy-saving control system with a gravity counteracting balance weight arranged at the tail part of a movable arm. The hydraulic energy-saving adjusting device comprises a movable arm oil cylinder unloading control valve and a counterweight position adjusting oil cylinder control valve, wherein the movable arm oil cylinder unloading control valve is connected with an action arm oil cylinder oil way, the output end of the counterweight position adjusting oil cylinder control valve is connected with a counterweight position adjusting oil cylinder, the input end of the counterweight position adjusting oil cylinder control valve is connected with an excavator hydraulic main pressure oil way and an oil return way, and the control signal output end of the controller is electrically connected with the movable arm oil cylinder unloading control valve and the counterweight position adjusting oil cylinder control valve. The invention has high safety, low maintenance cost, easy realization of automatic control, capability of meeting the energy-saving requirement of the full working condition of lifting and descending of the movable arm mechanism and obvious energy-saving effect.)

1. The utility model provides an excavator energy-saving control system, includes excavator state detection subassembly, controller, the energy-conserving adjusting device of hydraulic pressure, and excavator state detection subassembly is used for detecting excavator operating condition's information to the detection information input controller that will acquire, the controller carries out energy-conserving control, its characterized in that to the energy-conserving adjusting device of hydraulic pressure according to detection information: the hydraulic energy-saving adjusting device comprises a movable arm oil cylinder unloading control valve and a counterweight position adjusting oil cylinder control valve, wherein the movable arm oil cylinder unloading control valve is connected with an action arm oil cylinder oil way, the output end of the counterweight position adjusting oil cylinder control valve is connected with a counterweight position adjusting oil cylinder, the input end of the counterweight position adjusting oil cylinder control valve is connected with an excavator hydraulic main pressure oil way and an oil return way, and the control signal output end of a controller is electrically connected with the movable arm oil cylinder unloading control valve and the counterweight position adjusting oil cylinder control valve.

2. The excavator energy saving control system of claim 1, wherein: the excavator state detection assembly comprises an inclination angle sensor and a displacement sensor, and the inclination angle sensor and the displacement sensor are used for detecting an excavator body inclination angle, a working arm inclination angle and an energy-saving counterweight position coordinate.

3. The excavator energy saving control system of claim 1, wherein: the excavator state detection assembly comprises a pressure sensor, and the pressure sensor is used for detecting the pressure of an excavator system.

4. The excavator energy saving control system of claim 1, wherein: the excavator state detection assembly comprises a speed sensor, and the speed sensor is used for detecting the position change speed and acceleration of the excavator working arm and the energy-saving counterweight.

5. The excavator energy saving control system of claim 1, wherein: the hydraulic energy-saving adjusting device also comprises a movable arm pilot control electromagnetic valve which is connected in a movable arm pilot control oil way of the excavator and is used for controlling the pilot control pressure of the movable arm of the excavator by a controller.

6. The excavator energy saving control system of claim 1, wherein: the unloading control valve of the movable arm oil cylinder in the hydraulic energy-saving adjusting device is a pilot type electromagnetic valve, and the control valve of the counterweight position adjusting oil cylinder is a pilot type electromagnetic valve.

7. The excavator energy saving control system of claim 1, wherein: the hydraulic energy-saving adjusting device further comprises an energy-saving counterweight pilot electromagnetic valve which is connected in a counterweight position adjusting oil cylinder control valve pilot control oil way and used for the controller to more stably and accurately control the excavator counterweight position adjusting oil cylinder control valve.

8. The excavator energy saving control system of claim 1, wherein: the hydraulic energy-saving adjusting device further comprises a movable arm oil cylinder unloading pilot electromagnetic valve which is connected in a pilot control oil path of a movable arm oil cylinder unloading control valve and used for controlling the movable arm oil cylinder unloading control valve of the excavator more stably and accurately by a controller.

9. The excavator energy saving control system of claim 1, wherein: the hydraulic energy-saving adjusting device also comprises a throttle valve, wherein the throttle valve is connected in series in a control oil path of the actuating arm oil cylinder and is used for limiting the maximum movement speed of the actuating arm oil cylinder and increasing the working back pressure when the actuating arm oil cylinder is unloaded.

10. The excavator energy saving control system of claim 1, wherein: the hydraulic energy-saving adjusting device also comprises an explosion-proof valve, wherein the explosion-proof valve is connected with the oil cylinder oil path of the actuating arm and the oil path of the counterweight position adjusting oil cylinder and is used for safety control after the working oil path of the excavator bursts.

Technical Field

The invention relates to an energy-saving excavator, in particular to an excavator energy-saving control system with a movable arm tail part provided with a gravity counteracting balance weight.

Background

The excavator is an important construction engineering machine, and is widely applied to various engineering projects such as engineering construction, mine excavation and the like, when the excavator works, the excavator is arranged for preventing the excavator from overturning and increasing the stability of the whole excavator, the tail part of a rotary platform of the excavator is provided with a counterweight for the stability of the whole excavator, and the current application purpose of the counterweight of the excavator is single and is only arranged for the purpose of improving the stability and the safety of the excavator, for example, the invention discloses an engineering mechanical device, a movable counterweight system and a control method in CN 103046606B, wherein although the counterweight position can be adjusted, the invention aims to improve the working stability and the safety of the engineering mechanical device by adjusting the counterweight position.

When the excavator works, the movable arm mechanism needs to be lifted and lowered continuously to realize working conditions of excavation, unloading and the like. The excavator's actuator is very massive in its own right, which requires a lot of extra energy to overcome the extra gravity, and thus a lot of energy is consumed. In order to reduce such energy consumption, a novel excavator having an energy-saving counterweight at the tail of a boom has been known in the prior art, and the energy-saving counterweight of the novel excavator is used for the purpose of offsetting the dead weight of the boom mechanism to generate excessive energy consumption, but a specific energy-saving control system is not disclosed in the excavator.

Disclosure of Invention

The invention aims to provide an energy-saving control system of an excavator, which realizes the optimal energy-saving effect of the excavator by controlling an energy-saving counterweight and a movable arm mechanism of the excavator.

The technical scheme adopted for solving the technical problem is as follows:

the excavator energy-saving control system comprises an excavator state detection assembly, a controller and a hydraulic energy-saving adjusting device, wherein the excavator state detection assembly is used for detecting the information of the working state of an excavator and inputting the obtained detection information into the controller, and the controller performs energy-saving control on the hydraulic energy-saving adjusting device according to the detection information; the hydraulic energy-saving adjusting device comprises a movable arm oil cylinder unloading control valve and a counterweight position adjusting oil cylinder control valve, wherein the movable arm oil cylinder unloading control valve is connected with an action arm oil cylinder oil way, the output end of the counterweight position adjusting oil cylinder control valve is connected with a counterweight position adjusting oil cylinder, the input end of the counterweight position adjusting oil cylinder control valve is connected with an excavator hydraulic main pressure oil way and an oil return way, and the control signal output end of a controller is electrically connected with the movable arm oil cylinder unloading control valve and the counterweight position adjusting oil cylinder control valve.

Compared with the prior art, the invention adopting the technical scheme has the beneficial effects that:

the safety is high, the maintenance cost is low, the automatic control is easy to realize, the energy-saving requirements of the full working condition of lifting and descending of the movable arm mechanism can be met, and the energy-saving effect is obvious.

Preferably, the further technical scheme of the invention is as follows:

the excavator state detection assembly comprises an inclination angle sensor and a displacement sensor, and the inclination angle sensor and the displacement sensor are used for detecting an excavator body inclination angle, a working arm inclination angle and an energy-saving counterweight position coordinate.

The excavator state detection assembly comprises a pressure sensor, and the pressure sensor is used for detecting the pressure of an excavator system.

The excavator state detection assembly comprises a speed sensor, and the speed sensor is used for detecting the position change speed and acceleration of the excavator working arm and the energy-saving counterweight.

The hydraulic energy-saving adjusting device also comprises a movable arm pilot control electromagnetic valve which is connected in a movable arm pilot control oil way of the excavator and is used for controlling the pilot control pressure of the movable arm of the excavator by a controller.

The unloading control valve of the movable arm oil cylinder in the hydraulic energy-saving adjusting device is a pilot type electromagnetic valve, and the control valve of the counterweight position adjusting oil cylinder is a pilot type electromagnetic valve.

The hydraulic energy-saving adjusting device further comprises an energy-saving counterweight pilot electromagnetic valve which is connected in a counterweight position adjusting oil cylinder control valve pilot control oil way and used for the controller to more stably and accurately control the excavator counterweight position adjusting oil cylinder control valve.

The hydraulic energy-saving adjusting device further comprises a movable arm oil cylinder unloading pilot electromagnetic valve which is connected in a pilot control oil path of a movable arm oil cylinder unloading control valve and used for controlling the movable arm oil cylinder unloading control valve of the excavator more stably and accurately by a controller.

The hydraulic energy-saving adjusting device also comprises a throttle valve, wherein the throttle valve is connected in series in a control oil path of the actuating arm oil cylinder and is used for limiting the maximum movement speed of the actuating arm oil cylinder and increasing the working back pressure when the actuating arm oil cylinder is unloaded.

The hydraulic energy-saving adjusting device also comprises an explosion-proof valve, wherein the explosion-proof valve is connected with the oil cylinder oil path of the actuating arm and the oil path of the counterweight position adjusting oil cylinder and is used for safety control after the working oil path of the excavator bursts.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

fig. 2 is a schematic diagram of a hydraulic control system of embodiment 1 of the invention;

FIG. 3 is a schematic structural view of embodiment 2 of the present invention;

fig. 4 is a schematic diagram of a hydraulic control system of embodiment 2 of the invention;

FIG. 5 is a schematic view of the explosion proof valve of the present invention;

FIG. 6 is a schematic diagram of another hydraulic control system according to embodiment 2 of the invention;

FIG. 7 is a schematic structural view of embodiment 3 of the present invention;

FIG. 8 is a schematic view of a hydraulic control system according to embodiment 3 of the invention;

FIG. 9 is a schematic view showing the control principle of a proportional pressure reducing solenoid valve applied in embodiment 3 of the present invention;

FIG. 10 is a schematic structural view of embodiment 4 of the present invention;

fig. 11 is a schematic diagram of a hydraulic control system of embodiment 4 of the invention;

FIG. 12 is a schematic diagram of another hydraulic control system according to embodiment 4 of the invention;

FIG. 13 is a schematic view of an excavator with a gravity-counteracting counterweight at the boom tail;

in the figure: 1-a hydraulic distributor; 2-a boom cylinder unloading control valve; 3-counterweight position adjusting oil cylinder control valve; 4-an overload valve; 5-an action arm oil cylinder; 6-counterweight position adjusting oil cylinder; 7-a boom pilot control solenoid valve; 8-an action arm pilot control valve; 9-a pilot pump; 10-an explosion-proof valve; 11-a throttle valve; 12-a small arm oil cylinder; 13-a boom forearm; 14-a bucket cylinder; 15-a bucket; 16-boom big arm; 17-a cab; 18-energy-saving counterweight; 19-a slide; 20-a tilt sensor; 21-a displacement sensor; 22-a counterweight support arm; 23-counterweight support arm cylinder; 24-a running gear; 25-a vehicle body; 26-a controller; 27-a pressure sensor; 28-speed sensor; 29-a boom mechanism support arm cylinder; 30-a boom mechanism support arm; 31-action arm king pin shaft; 32-energy-saving counterweight pilot electromagnetic valve; 33-boom cylinder unloading pilot solenoid valve.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings and examples.

For better details and understanding of the embodiment, the excavator shown in fig. 13 is taken as an example for explanation. In the figure, the actuator comprises a large arm 16 of the actuator, a small arm 13 of the actuator and a bucket 15, the energy-saving counterweight mechanism comprises an energy-saving counterweight 18, a counterweight position adjusting oil cylinder 6 and the like, the energy-saving counterweight mechanism and the actuator form a lever type structure by taking an actuator arm main pin shaft 31 as a fulcrum, the position of the energy-saving counterweight 18 is adjusted to balance the weight of the actuator under different working conditions of the actuator, and the position of the energy-saving counterweight 18 is adjusted by the counterweight position adjusting oil cylinder 6 to achieve the purpose of saving energy of the excavator.