Electric shovel bucket opening kinetic energy recovery device

Abstract

The invention discloses an electric shovel bucket opening kinetic energy recovery device, which relates to the technical field of mining electric shovels and comprises a bucket, a bucket rod joint, a bucket door, a first rotating arm, a second rotating arm, a third rotating arm, a kinetic energy collection unit and an energy storage module. According to the electric shovel bucket opening kinetic energy recovery device, on one hand, bucket door turning kinetic energy originally dissipated in a heat energy mode through bearing friction and mechanical damping in the traditional electric shovel discharging process is successfully captured and converted into available electric energy to be stored, the energy utilization efficiency of an electric shovel is improved, dependence on an external power source is reduced, and the energy cost is saved; and on the other hand, all the components are connected stably, transmission is smooth, the normal operation process of the electric shovel cannot be affected, installation and maintenance are convenient, the service life is long, and the device can adapt to complex working conditions of electric shovel operation. Meanwhile, through energy recovery and secondary utilization, energy waste is reduced, and the development trend of energy conservation and environmental protection is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric shovels for mining, and particularly relates to a device for recovering the kinetic energy of a shovel opening. BACKGROUND

[0002] After the electric shovel completes the material transfer to the unloading area, the opening motor starts the electric shovel gate opening program. After the opening motor is powered on, power is transmitted to the unlocking assembly of the shovel pin, which usually includes a fork and a return spring. The motor driving force will overcome the spring pre-tightening force and the friction resistance of the pin and the locking hole. After the pin is unlocked, the dozens of tons of ore or slag loaded in the shovel will form a continuous downward pressure on the inside of the gate due to its own gravity. At this time, the cargo gravity will decompose into a downward component along the shovel wall, which directly acts on the gate stress point, pushing the gate to turn outward around the cylindrical shaft connected to the bucket body. After unloading, the gate remains open due to its own weight, and the opening motor is powered off and stops running after the pin is completely unlocked. The conventional electric shovel kinetic energy recovery scheme does not pay attention to the energy potential of this process: when the gate is driven to turn over by the cargo gravity after the pin is unlocked, the connecting shaft will rotate synchronously with the gate, generating stable rotational kinetic energy, but this part of kinetic energy is mostly dissipated in the form of heat energy through bearing friction at the connecting shaft and mechanical damping when the gate turns over, neither captured and stored nor converted into usable energy, failing to form an effective recovery closed loop. SUMMARY

[0003] To solve some or all of the technical problems existing in the prior art, the application provides a device for recovering the kinetic energy of an electric shovel opening.

[0004] The application provides a device for recovering the kinetic energy of an electric shovel opening, comprising a bucket, a bucket arm joint, a gate, a first rotating arm, a second rotating arm, a kinetic energy collection unit and an energy storage module. The bucket arm joint is fixed on the shovel arm of the electric shovel, and side seats are fixedly connected to the two sides of the bucket arm joint. The first rotating arm and the second rotating arm are provided in two groups, and the two groups of first rotating arms and second rotating arms are symmetrically arranged on the two sides of the bucket. One end of the first rotating arm and one end of the second rotating arm are rotatably connected to the same side of the bucket, the other end of the first rotating arm is rotatably connected to the side seat, and the other end of the second rotating arm is rotatably connected to the bucket arm joint. The gate is rotatably connected to the bottom opening end of the bucket through a connecting shaft. The kinetic energy collection unit is in transmission connection with the connecting shaft, for converting the mechanical kinetic energy generated by the linkage of the connecting shaft and the gate into electrical energy. The energy storage module is in electrical connection with the kinetic energy collection unit, for storing the converted electrical energy.

[0005] Preferably, the kinetic energy collecting unit is a generator, which is arranged outside the bucket, the connecting shaft is fixedly connected with the bucket door, and the input shaft of the generator is coaxially connected with the connecting shaft.

[0006] Preferably, the connecting shaft extends outward from the side of the bucket to form an exposed section, and the connecting shaft exposed section and the generator input shaft are connected through a shaft sleeve to realize fixed connection and synchronous rotation.

[0007] Preferably, the first hinge seat and the second hinge seat are fixedly connected on the vertical side wall of the bucket close to the bucket rod joint.

[0008] Preferably, the first rotating arm is hinged with the first hinge seat, and the second rotating arm is hinged with the second hinge seat.

[0009] Preferably, the third rotating arm is further included, the third hinge seat is fixedly connected on the side bottom of the bucket door close to the rotating shaft, one end of the third rotating arm is hinged with the third hinge seat, and the other end of the third rotating arm is hinged with the bucket rod joint.

[0010] Preferably, the upper end of the bucket is fixedly connected with a steel rope connecting part.

[0011] Preferably, the energy storage module is a rechargeable battery pack.

[0012] The electric shovel opening bucket kinetic energy recovery device of the present application has the following advantages and positive effects: (1) The turning kinetic energy of the bucket door in the traditional electric shovel unloading process, which is originally dissipated in the form of heat energy through bearing friction and mechanical damping, is successfully captured, converted into usable electric energy and stored, the energy utilization efficiency of the electric shovel is improved, the dependence on external power supply is reduced, and the energy cost is saved.

[0013] (2) The connection of each component is stable and smooth, which will not affect the normal operation process of the electric shovel, and the installation and maintenance are convenient, the service life is long, and the complex working conditions of the electric shovel operation can be adapted. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only used to further understand the embodiments of the present application and constitute a part of the present application. For those skilled in the art, other drawings can also be obtained without creative labor. In the drawings: Figure 1 is a structural schematic diagram of the electric shovel opening bucket kinetic energy recovery device of the present application; Explanation of reference signs: 1-Bucket, 11-First hinge seat, 12-Second hinge seat, 2-Stick joint, 21-Side seat, 3-Bucket gate, 31-Third hinge seat, 4-Generator, 5-First boom, 6-Second boom, 7-Third boom, 8-Steel rope connection. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0016] like Figure 1 As shown, the electric shovel bucket opening kinetic energy recovery device of this application includes a bucket 1, a boom joint 2, a bucket gate 3, a first rotating arm 5, a second rotating arm 6, a third rotating arm 7, a kinetic energy harvesting unit, and an energy storage module. The boom joint 2 is fixed on the boom of the electric shovel. Side seats 21 are fixedly connected to both sides of the boom joint 2. The first rotating arm 5 and the second rotating arm 6 are each provided in two sets. The two sets of first rotating arms 5 and second rotating arms 6 are symmetrically arranged on both sides of the bucket 1. One end of the first rotating arm 5 and the second rotating arm 6 are rotatably connected to the same side of the bucket 1. The other end of the first rotating arm 5 is rotatably connected to the side seat 21, and the other end of the second rotating arm 6 is rotatably connected to the boom joint 2. A first hinge seat 11 and a second hinge seat 12 are vertically arranged and fixedly connected on the outer wall of the bucket 1 near the boom joint 2. The first hinge seat 11 is located near the upper bucket opening of the bucket 1. The first rotating arm 5 is hinged to the first hinge seat 11, and the second rotating arm 6 is hinged to the second hinge seat 12. The first rotating arm 5 and the second rotating arm 6 can work together to control the tilting posture of the bucket 1, ensuring the stability of the bucket 1 during unloading.

[0017] The gantry 3 is rotatably connected to the bottom opening of the bucket 1 via a connecting shaft. The function of the gantry 3 is to seal the bottom of the bucket 1, maintaining a closed state during loading to prevent material leakage, and rotating around the connecting shaft during unloading to allow the material to fall. A third hinge seat 31 is fixedly connected to the bottom side of the gantry 3 near the rotating shaft. One end of the third rotating arm 7 is hinged to the third hinge seat 31, and the other end of the third rotating arm 7 is hinged to the boom joint 2. The third rotating arm 7 provides limiting and guiding for the gantry 3, ensuring accurate rotation trajectory and preventing swaying.

[0018] The kinetic energy harvesting unit is a generator 4, which is located on the outside of the bucket 1. The connecting shaft is fixedly connected to the bucket gate 3. The input shaft of the generator 4 is coaxially connected to the connecting shaft. The kinetic energy harvesting unit is driven by the connecting shaft and is used to convert the mechanical kinetic energy generated by the linkage between the connecting shaft and the bucket gate 3 into electrical energy. Preferably, the outer casing of the generator 4 is waterproof and dustproof to adapt to the harsh mining environment.

[0019] Preferably, the connecting shaft extends outward from the side of the bucket 1 to form an exposed section, and the exposed section of the connecting shaft and the input shaft of the generator 4 are connected by a bushing to achieve a fixed connection and synchronous rotation between the two.

[0020] The energy storage module is a rechargeable battery pack, electrically connected to the kinetic energy harvesting unit, used to store converted electrical energy. Preferably, the entire energy storage module can be encapsulated in an impact-resistant housing and equipped with overcharge, over-discharge, and short-circuit protection devices.

[0021] A steel cable connector 8 is fixedly connected to the upper end of the bucket 1.

[0022] Furthermore, under the action of the whole machine lifting mechanism, the bucket 1 is tilted downwards. At this time, the bucket gate 3 is located above the bucket 1. Under the influence of its own weight, the bucket gate 3 rotates around the connecting shaft and seals the bottom of the bucket 1, which can also charge the energy storage module.

[0023] The specific operating procedure is as follows: After the electric shovel has finished loading the ore, the full bucket 1 is smoothly lifted and transported to the designated unloading area via the steel cable connection 8 at the upper end of the bucket 1 in conjunction with the overall lifting mechanism. At this time, the electric shovel's bucket opening motor starts, and the driving force is transmitted to the pin unlocking assembly of the bucket 1. This assembly overcomes the preload of the internal spring and the frictional resistance between the pin and the locking hole, completing the unlocking action of the bucket 1. After unlocking, the ore loaded in the bucket 1 exerts a continuous downward pressure on the inside of the bucket gate 3 under its own weight. This pressure is decomposed into a component force that acts downward along the bucket wall of the bucket 1. This component force acts directly on the force point of the bucket gate 3, pushing the bucket gate 3 to rotate outward around the connecting shaft connected to the bucket 1. During the rotation of the bucket gate 3, the connecting shaft fixedly connected to it rotates synchronously. The exposed section of the connecting shaft is rigidly linked to the input shaft of the generator 4 through the bushing, driving the input shaft of the generator 4 to rotate together. The generator 4 then starts working, efficiently converting the stable mechanical kinetic energy generated by the rotation of the bucket gate 3 into electrical energy. The electrical energy generated by generator 4 is transmitted to the energy storage module, where it is safely stored by a rechargeable battery pack. During storage, the battery pack's protection device monitors the voltage and current in real time to prevent safety hazards such as overcharging. When the electric shovel needs power again, such as to restart the bucket motor for unloading and unlocking, to power lighting equipment in the work area, or to provide power for other auxiliary electrical components, the energy storage module can release the stored electrical energy as needed, realizing the secondary use of recovered electrical energy and forming a complete energy recovery and recycling system.

[0024] This device, on the one hand, successfully captures the kinetic energy of the bucket gate 3 turning over during the unloading process of a traditional electric shovel, which would normally be dissipated as heat through bearing friction and mechanical damping. It converts this energy into usable electrical energy and stores it, improving the energy utilization efficiency of the electric shovel, reducing dependence on external power sources, and saving energy costs. On the other hand, the device's structural design is scientifically sound, with stable connections between components and smooth transmission, ensuring it does not affect the normal operation of the electric shovel. It is also easy to install and maintain, has a long service life, and can adapt to the complex working conditions of electric shovel operations. Simultaneously, through energy recovery and reuse, it reduces energy waste, aligning with the development trend of energy conservation and environmental protection, and providing a new direction for the technological upgrading of electric shovel equipment.

[0025] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A device for recovering kinetic energy from an electric shovel bucket opening, characterized in that, The device includes a bucket (1), a boom joint (2), a bucket gate (3), a first boom (5), a second boom (6), a kinetic energy harvesting unit, and an energy storage module. The boom joint (2) is fixed to the boom of the electric shovel. Side seats (21) are fixedly connected to both sides of the boom joint (2). The first boom (5) and the second boom (6) are each provided with two sets. The two sets of the first boom (5) and the second boom (6) are symmetrically arranged on both sides of the bucket (1). One end of the first boom (5) and the second boom (6) can rotate. Connected to the same side of the bucket (1), the other end of the first rotating arm (5) is rotatably connected to the side seat (21), the other end of the second rotating arm (6) is rotatably connected to the stick joint (2), the bucket gate (3) is rotatably connected to the bottom opening end of the bucket (1) through a connecting shaft, the kinetic energy harvesting unit is drivenly connected to the connecting shaft, and is used to convert the mechanical kinetic energy generated by the linkage between the connecting shaft and the bucket gate (3) into electrical energy, and the energy storage module is electrically connected to the kinetic energy harvesting unit, and is used to store the converted electrical energy.

2. The electric shovel bucket opening kinetic energy recovery device according to claim 1, characterized in that, The kinetic energy harvesting unit is a generator (4). The generator (4) is located on the outside of the bucket (1). The connecting shaft is fixedly connected to the bucket door (3). The input shaft of the generator (4) is coaxially connected to the connecting shaft.

3. The electric shovel bucket opening kinetic energy recovery device according to claim 2, characterized in that, The connecting shaft extends outward from the side of the bucket (1) to form an exposed section. The exposed section of the connecting shaft and the input shaft of the generator (4) are connected by a bushing to achieve a fixed connection and synchronous rotation between the two.

4. The electric shovel bucket opening kinetic energy recovery device according to claim 1, characterized in that, The bucket (1) has a first hinge seat (11) and a second hinge seat (12) vertically arranged and fixedly connected on the outer side wall near the stick joint (2). The first hinge seat (11) is located near the upper end of the bucket (1).

5. The electric shovel bucket opening kinetic energy recovery device according to claim 4, characterized in that, The first rotating arm (5) is hinged to the first hinge seat (11), and the second rotating arm (6) is hinged to the second hinge seat (12).

6. The electric shovel bucket opening kinetic energy recovery device according to claim 1, characterized in that, It also includes a third rotating arm (7), and a third hinge seat (31) is fixedly connected to the bottom of the side of the bucket gate (3) near the rotating shaft. One end of the third rotating arm (7) is hinged to the third hinge seat (31), and the other end of the third rotating arm (7) is hinged to the bucket rod joint (2).

7. The electric shovel bucket opening kinetic energy recovery device according to claim 1, characterized in that, The upper end of the bucket (1) is fixedly connected to a steel rope connector (8).

8. The electric shovel bucket opening kinetic energy recovery device according to claim 1, characterized in that, The energy storage module is a rechargeable battery pack.

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