Energy recovery device for crane

Abstract

The energy recovery device comprises a power generation assembly and a loading plate, a prime motor, a speed reducer, a winding drum frame and a U-shaped fixing base are installed at the top of the loading plate, a crane winding drum is rotationally connected into the winding drum frame, and an output shaft of the prime motor is in transmission connection with an input shaft of the speed reducer; an output shaft of the speed reducer is in transmission connection with one end of the crane roller, the power generation assembly comprises a machine body shell and a supporting seat, and the supporting seat is fixedly connected to the bottom of the machine body shell. Through the arranged power generation assembly, gravitational potential energy generated when a heavy object is put down by the crane can be effectively converted into electric energy, recycling of energy is achieved, meanwhile, the power generation assembly is externally designed, when the power generation assembly breaks down or needs to be overhauled, an operator can easily detach the power generation assembly, and the power generation assembly is convenient to use. And the crane roller or other parts do not need to be disassembled complexly, so that the maintenance process is simplified, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and particularly relates to an energy recovery device for a crane. Background Art

[0002] During the operation of a crane, especially when lifting and lowering heavy objects, a large amount of energy conversion is involved. When lifting a heavy object, the prime mover generates energy to lift the heavy object, and the energy consumption in this process is obvious. However, for some cranes, such as port loading and unloading cranes, the working condition of frequently lowering heavy objects often occurs. At this time, the gravitational potential energy of the crane when lowering the heavy object is often converted into mechanical energy by the working mechanism and then into heat energy, which is consumed in the system. This energy conversion method is not only inefficient but also causes a large amount of energy waste. To solve this problem, the industry has begun to research energy recovery devices for cranes. The main goal of these devices is to convert the force generated when lowering a heavy object (i.e., gravitational potential energy) into mechanical energy, and further convert this mechanical energy into electrical energy or other forms of available energy, so as to achieve effective recovery and reuse of energy.

[0003] An energy recovery device for the hoisting mechanism of a tower crane disclosed in the patent with the publication number CN110230577B converts the gravitational potential energy generated by the lowering of the spreader into electrical energy for storage by means of the principle that a coil cuts magnetic lines of force in a magnetic field to generate current. When the load is released, the load descends and drives the drum to rotate together. At this time, the overrunning clutch frictionally engages, and the inner and outer rings of the overrunning clutch rotate synchronously, thereby transmitting the torque to the speed increasing gear train. The gear finally drives the stator magnetic pole to rotate, causing the coil group to cut the magnetic field lines to generate alternating current, which is converted into stable direct current by a rectifier and a voltage regulator and stored in a storage battery. The structure is simple and reliable, and there is no need to make major modifications to the original tower crane hoisting mechanism, which has a certain degree of advancement.

[0004] Although the above energy recovery device has significant energy-saving benefits and can recover the gravitational potential energy during the lowering process of the tower crane spreader and convert it into electrical energy for driving weak-current devices such as tower crane lighting and sensors, it still has some deficiencies in some aspects. The main components of this energy recovery device, such as the transmission control unit and the energy conversion unit, are all arranged inside the drum. This design increases the operational complexity when these components need to be disassembled or repaired. When a fault occurs in the device, since the components are encapsulated inside the drum, the difficulty of fault troubleshooting will increase significantly. The operator may need to spend more time and effort to determine the specific location of the fault, which may affect the normal operation and production efficiency of the tower crane.

[0005] Therefore, it is necessary to invent an energy recovery device for a crane to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide an energy recovery device for a crane to solve the problems in the above-mentioned technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an energy recovery device for a crane, including a power generation component and a loading plate. A prime mover, a reducer, a drum frame and a U-shaped fixing seat are installed on the top of the loading plate. A crane drum is rotatably connected inside the drum frame. The output shaft of the prime mover is drivingly connected to the input shaft of the reducer, and the output shaft of the reducer is drivingly connected to one end of the crane drum. The power generation component includes a body shell and a support seat. The support seat is fixedly connected to the bottom of the body shell. The bottom end of the support seat is slidably connected inside the U-shaped fixing seat. One first screw hole is opened at each of the four corners of the surface of the U-shaped fixing seat, and one second screw hole is opened at each of the four corners of the bottom end of the support seat. The four second screw holes are respectively arranged in one-to-one correspondence with the four first screw holes. One hand-tightening screw is arranged above each of the four corners of the surface of the U-shaped fixing seat. The bottom end of the hand-tightening screw penetrates through the first screw hole and is threadedly connected to the second screw hole. A rotating shaft is rotatably connected inside the body shell. One end of the rotating shaft extends outside the body shell and is drivingly connected to the other end of the crane drum through a coupling.

[0008] By externally designing the power generation component and using the U-shaped fixing seat to limit and fix it, it is convenient to quickly disassemble and repair the power generation component when a fault occurs.

[0009] Preferably, a stator is fixedly connected to the inner wall of the body shell, a rotor is sleeved on the surface of the rotating shaft, and the rotor is matched with the stator.

[0010] Through the design of the stator and the rotor, the basic working principle of power generation is realized, providing a key component for energy recovery and enabling the device to convert mechanical energy into electrical energy.

[0011] Preferably, a terminal block is installed on the surface of the body shell. One end of the terminal block extends into the body shell and is electrically connected to the winding on the surface of the stator.

[0012] The setting of the terminal block enables the electrical energy generated by the power generation component to be conveniently output, providing an interface for subsequent electrical energy processing and storage.

[0013] Preferably, a rectifier, a voltage regulator and a storage battery are installed on the top of the loading plate. The other end of the terminal block is electrically connected to the input end of the rectifier.

[0014] The setting of the storage battery realizes the storage of electrical energy and improves the energy utilization efficiency of the device.

[0015] Preferably, the output end of the rectifier is electrically connected to the input end of the voltage regulator, and the output end of the voltage regulator is electrically connected to the input end of the storage battery.

[0016] Through the settings of the rectifier and the voltage regulator, the stability of voltage and current during the transmission of electric energy from the power generation component to the storage battery is ensured, protecting the storage battery and extending its service life.

[0017] Preferably, a guiding frame is installed on the top of the loading plate. The guiding frame is arranged directly in front of the crane drum, and a guiding seat is arranged inside the guiding frame.

[0018] The settings of the guiding frame and the guiding seat provide additional support and guidance for the cable on the crane drum, improving the stability and safety of the device during operation.

[0019] Preferably, a ball screw is rotatably connected inside the guiding frame. The ball screw penetrates through the bottom end of the guiding seat and is in transmission connection with the guiding seat. A driving motor is installed on one side of the guiding frame, and the output shaft of the driving motor is in transmission connection with one end of the ball screw.

[0020] Through the transmission of the driving motor and the ball screw, the automatic adjustment of the guiding seat is realized, improving the automation degree and working efficiency of the device.

[0021] Preferably, a limiting slide bar is fixedly connected inside the guiding frame. The limiting slide bar penetrates through the top end of the guiding seat and is slidably connected with the guiding seat.

[0022] The setting of the limiting slide bar ensures the stability and accuracy of the guiding seat during movement.

[0023] Preferably, a guiding groove is formed in the middle of the guiding seat, and two guiding pulleys are rotatably connected inside the guiding groove. The two guiding pulleys are arranged parallel to each other vertically.

[0024] The two guiding pulleys are arranged parallel to each other vertically, forming a stable guiding channel, thus ensuring the stability of the cable during movement.

[0025] In the above technical solution, the technical effects and advantages provided by the present invention are as follows:

[0026] 1. Through the provided power generation component, the gravitational potential energy generated when the crane lowers heavy objects can be effectively converted into electric energy, realizing the reuse of energy, significantly reducing the energy consumption of the crane. At the same time, the power generation component adopts an external design. When the power generation component fails or needs to be repaired, the operator can easily disassemble the power generation component without complex disassembly of the crane drum or other components. This design not only simplifies the maintenance process but also reduces the maintenance cost;

[0027] 2. By setting components such as a guide frame, a guide seat, a ball screw, and a driving motor, precise guiding and stable operation of the cable on the crane drum are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure from the first perspective of the present invention;

[0029] Figure 2 It is a schematic diagram of the overall structure from the second perspective of the present invention;

[0030] Figure 3 It is a schematic diagram of the overall structure when the power generation component of the present invention is disassembled;

[0031] Figure 4 It is a schematic diagram of the power generation component of the present invention;

[0032] Figure 5 It is a sectional view of the structure of the power generation component of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the U-shaped fixing seat of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the guide frame of the present invention.

[0035] Description of the reference numerals:

[0036] 1. Power generation component; 2. Loading plate; 3. Prime mover; 4. Reducer; 5. Drum frame; 6. U-shaped fixing seat; 7. Crane drum; 8. Body shell; 9. Support seat; 10. First screw hole; 11. Second screw hole; 12. Hand-tightening screw; 13. Rotating shaft; 14. Coupling; 15. Stator; 16. Rotor; 17. Terminal; 18. Rectifier; 19. Voltage regulator; 20. Battery; 21. Guide frame; 22. Guide seat; 23. Ball screw; 24. Driving motor; 25. Limit slide bar; 26. Guide pulley. DETAILED DESCRIPTION OF THE INVENTION

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] The present invention provides as Figures 1-7An energy recovery device for a crane as shown includes a power generation assembly 1 and a loading plate 2. A prime mover 3, a speed reducer 4, a drum frame 5 and a U-shaped fixing seat 6 are installed on the top of the loading plate 2. A crane drum 7 is rotatably connected inside the drum frame 5. The output shaft of the prime mover 3 is drivingly connected to the input shaft of the speed reducer 4, and the output shaft of the speed reducer 4 is drivingly connected to one end of the crane drum 7. The power generation assembly 1 includes a machine body shell 8 and a support seat 9. The support seat 9 is fixedly connected to the bottom of the machine body shell 8. The bottom end of the support seat 9 is slidably connected inside the U-shaped fixing seat 6. One first screw hole 10 is provided at each of the four corners of the surface of the U-shaped fixing seat 6. One second screw hole 11 is provided at each of the four corners of the bottom end of the support seat 9. The four second screw holes 11 are respectively arranged in one-to-one correspondence with the four first screw holes 10. One hand-tightening screw 12 is provided above each of the four corners of the surface of the U-shaped fixing seat 6. The bottom end of the hand-tightening screw 12 penetrates through the first screw hole 10 and is threadedly connected to the second screw hole 11. A rotating shaft 13 is rotatably connected inside the machine body shell 8. One end of the rotating shaft 13 extends outside the machine body shell 8 and is drivingly connected to the other end of the crane drum 7 through a coupling 14.

[0039] In one aspect of this embodiment, a stator 15 is fixedly connected to the inner wall of the machine body shell 8. A rotor 16 is sleeved on the surface of the rotating shaft 13. The rotor 16 is matched with the stator 15. A terminal block 17 is installed on the surface of the machine body shell 8. One end of the terminal block 17 is electrically connected to the winding on the surface of the stator 15 that extends into the machine body shell 8. A rectifier 18, a voltage regulator 19 and a storage battery 20 are installed on the top of the loading plate 2. The other end of the terminal block 17 is electrically connected to the input end of the rectifier 18. The output end of the rectifier 18 is electrically connected to the input end of the voltage regulator 19. The output end of the voltage regulator 19 is electrically connected to the input end of the storage battery 20. A guide frame 21 is installed on the top of the loading plate 2. The guide frame 21 is arranged directly in front of the crane drum 7. A guide seat 22 is arranged inside the guide frame 21. A ball screw 23 is rotatably connected inside the guide frame 21. The ball screw 23 penetrates through the bottom end of the guide seat 22 and is drivingly connected to the guide seat 22. A driving motor 24 is installed on one side of the guide frame 21. The output shaft of the driving motor 24 is drivingly connected to one end of the ball screw 23. A limiting slide bar 25 is fixedly connected inside the guide frame 21. The limiting slide bar 25 penetrates through the top end of the guide seat 22 and is slidably connected to the guide seat 22. A guide groove is provided in the middle of the guide seat 22. Two guide pulleys 26 are rotatably connected inside the guide groove. The two guide pulleys 26 are arranged parallel to each other vertically.

[0040] The working principle of the present invention:

[0041] Referring to the attached Figures 1-7 description, when using the present invention, first, when the crane needs to lift a heavy object, the prime mover 3 starts to work. Its output shaft is transmitted to the crane drum 7 after being decelerated by the speed reducer 4, driving the crane drum 7 to rotate, and lifting the heavy object through the cable on it;

[0042] During the process of lowering the heavy object, the rotation of the crane drum 7 drives the shaft 13 connected to the other end thereof through the coupling 14 to rotate, and the rotation of the shaft 13 drives the rotor 16 sleeved on the surface thereof to rotate, so that the rotor 16 cuts the magnetic lines of force in the magnetic field generated by the stator 15, thereby generating induced currents, which are output to the rectifier 18 through the terminal 17, and the rectifier 18 converts the alternating current into direct current, and then outputs it to the voltage stabilizer 19, which stabilizes the direct current to ensure the stability of the output voltage, and the DC power after voltage stabilization is stored in the battery 20 for subsequent use;

[0043] When the power generation component 1 fails, first remove the coupling 14, disconnect the connection between the rotating shaft 13 and the crane drum 7, then cancel the connection between the terminal 17 and the rectifier 18, and then screw the hand screw 12 to make the hand screw 12 withdraw from the inside of the second screw hole 11. After that, the support seat 9 of the power generation component 1 can be slid out from the inside of the U-shaped fixing seat 6. Due to the external design of the power generation component 1, daily disassembly and maintenance become easy and convenient;

[0044] During the operation of the crane, the cable on the crane drum 7 needs to pass between two guide pulleys 26. The two guide pulleys 26 are arranged in parallel up and down to form a stable guide channel, thereby ensuring the stability of the cable during movement. When the drive motor 24 is started, it drives the ball screw 23 to rotate. Due to the transmission connection between the ball screw 23 and the guide seat 22, the rotational motion of the ball screw is converted into linear motion of the guide seat 22. By controlling the speed and direction of the drive motor 24, the sliding speed and direction of the guide seat 22 can be accurately controlled, and the cable can be guided during the process of lifting or lowering heavy objects, so that the cable can be wound or released in an orderly manner.

Claims

1. An energy recovery device for a crane, comprising a power generation assembly (1) and a loading plate (2), characterized in that: A prime mover (3), a reducer (4), a drum frame (5) and a U-shaped fixed seat (6) are installed on the top of the loading plate (2); a crane drum (7) is rotatably connected inside the drum frame (5); the output shaft of the prime mover (3) is drivingly connected to the input shaft of the reducer (4); the output shaft of the reducer (4) is drivingly connected to one end of the crane drum (7); the power generation assembly (1) comprises a machine body shell (8) and a support seat (9); the support seat (9) is fixedly connected to the bottom of the machine body shell (8); the bottom end of the support seat (9) is slidably connected to the inside of the U-shaped fixed seat (6); the surface of the U-shaped fixed seat (6) has four corners each opening A No. 1 screw hole (10) is provided, and a No. 2 screw hole (11) is provided at each of the four corners of the bottom end of the support seat (9). The four No. 2 screw holes (11) are respectively arranged in one-to-one correspondence with the four No. 1 screw holes (10). A hand screw (12) is respectively arranged above the four corners of the surface of the U-shaped fixing seat (6). The bottom end of the hand screw (12) passes through the No. 1 screw hole (10) and is threadedly connected to the No. 2 screw hole (11). A rotating shaft (13) is rotatably connected inside the body shell (8). One end of the rotating shaft (13) extends to the outside of the body shell (8) and is transmission-connected to the other end of the crane drum (7) through a coupling (14).

2. The energy recovery device for a crane according to claim 1, characterized in that: A stator (15) is fixedly connected to the inner wall of the machine body shell (8), a rotor (16) is sleeved on the surface of the rotating shaft (13), and the rotor (16) matches the stator (15).

3. The energy recovery device for a crane according to claim 2, characterized in that: A connection terminal (17) is installed on the surface of the machine housing (8), and one end of the connection terminal (17) is electrically connected to a winding extending into the interior of the machine housing (8) and to the surface of the stator (15).

4. The energy recovery device for a crane according to claim 3, characterized in that: A rectifier (18), a voltage stabilizer (19) and a storage battery (20) are installed on the top of the loading plate (2), and the other end of the connection terminal (17) is electrically connected to the input end of the rectifier (18).

5. The energy recovery device for a crane according to claim 4, characterized in that: The output end of the rectifier (18) is electrically connected to the input end of the voltage stabilizer (19), and the output end of the voltage stabilizer (19) is electrically connected to the input end of the battery (20).

6. The energy recovery device for a crane according to claim 1, characterized in that: A guide frame (21) is installed on the top of the loading plate (2), and the guide frame (21) is arranged in front of the crane drum (7). A guide seat (22) is arranged inside the guide frame (21).

7. The energy recovery device for a crane according to claim 6, characterized in that: A ball screw (23) is rotatably connected inside the guide frame (21), the ball screw (23) passes through the bottom end of the guide seat (22) and is transmission-connected to the guide seat (22), a drive motor (24) is installed on one side of the guide frame (21), and an output shaft of the drive motor (24) is transmission-connected to one end of the ball screw (23).

8. The energy recovery device for a crane according to claim 7, characterized in that: The guide frame (21) is internally fixedly connected to a limiting slide bar (25), and the limiting slide bar (25) passes through the top of the guide seat (22) and is slidably connected to the guide seat (22).

9. The energy recovery device for a crane according to claim 7, characterized in that: A guide groove is provided in the middle of the guide seat (22), and two guide pulleys (26) are rotatably connected inside the guide groove. The two guide pulleys (26) are arranged in parallel up and down.

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