A quay crane counterweight energy-saving system with vibration reduction function

Abstract

The present invention discloses an energy-saving counterweight system for a quay crane with a vibration-reduction function. The system comprises a motor, a reduction gearbox, and a hoisting drum, each connected in a sequential transmission manner. One end of the hoisting wire rope is wound around the hoisting drum, while the other end passes over a hoisting redirecting pulley and extends to a trolley pulley assembly, which is fixed to one end of the quay crane beam. One end of the counterweight wire rope is wound around the hoisting drum, while the other end passes over a balancing movable pulley assembly and is fixed to the quay crane structure via oil and gas damping. The winding direction of the counterweight wire rope on the hoisting drum is opposite to that of the hoisting wire rope. The balancing movable pulley assembly is fixed above the counterweight. The present invention utilizes a counterweight to reduce the operating energy consumption of the quay crane by 25%. It also controls the vibration of the counterweight, preventing excessive tension on the counterweight wire rope and collision with the quay crane structure. This improves the stability of the energy-saving system and the quay crane structure, thereby protecting the quay crane structure.

Description

Technical Field

[0001] The present invention relates to the technical field of port loading and unloading equipment, in particular to a quay crane counterweight energy-saving system with a vibration reduction function. Background Art

[0002] Ports and terminals are distribution centers for waterborne cargo and play a vital role in driving the development of international logistics. Over the past six years, global container throughput has grown at an annual rate of 3.3%, with major Chinese ports maintaining a 6% growth rate. Ocean shipping volumes are growing rapidly. In this rapidly developing environment, shipping companies are placing increasing demands on port and terminal loading and unloading efficiency. While developing new technologies to improve port loading and unloading efficiency, they also need to focus on controlling port and terminal operating costs.

[0003] At present, large port terminals mainly use quay cranes for container loading and unloading. Quay cranes are large equipment installed on the terminal, which directly affects the container loading and unloading efficiency of the port terminal. At the same time, the energy consumption cost of the quay cranes is also related to the operating costs of the port terminal. Reducing the energy consumption of the quay cranes can effectively save the operating costs of the port terminal.

[0004] On the same day, the applicant submitted a counterweight energy-saving system for a quay crane, which uses a counterweight to offset part of the energy consumption of the quay crane in lifting containers. However, during actual operation, the movement of the counterweight is not stable, and longitudinal or lateral vibrations will occur, increasing the tension on the counterweight wire rope. At the same time, it may also collide with the quay crane structure, posing a hidden danger to the safe operation of the quay crane. Therefore, it is necessary to develop a quay crane energy-saving system that can effectively control the counterweight to improve the safety and stability of the quay crane operation. Summary of the Invention

[0005] The purpose of the present invention is to provide a quay crane counterweight energy-saving system with a vibration reduction function, which uses the counterweight to reduce the energy consumption during the operation of the quay crane, while controlling the vibration generated by the counterweight during movement, thereby improving the stability and safety of the energy-saving system and the quay crane structure.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solution: A quay crane counterweight energy-saving system with a vibration reduction function includes a motor, a reduction gear, a lifting drum, a lifting wire rope, a counterweight wire rope, a balancing movable pulley set, a counterweight, a lifting redirecting pulley, a trolley pulley set and an oil-gas damper. The motor, reduction gear and lifting drum are sequentially connected in transmission, one end of the lifting wire rope is wound around the lifting drum, and the other end of the lifting wire rope passes around the lifting redirecting pulley and extends to the trolley pulley set, and the lifting redirecting pulley set is fixedly installed at one end of the quay crane beam. The lifting drum rotates under the action of the motor, driving the lifting wire rope to move, realizing the vertical movement of the sling, and completing the lifting and placement of the container.

[0007] One end of the counterweight steel wire rope is wound around the hoisting drum, and the other end of the counterweight steel wire rope is fixed to the quay crane structure after passing through the balancing movable pulley group. The winding direction of the counterweight steel wire rope on the hoisting drum is opposite to the winding direction of the lifting steel wire rope on the hoisting drum. The oil and gas damping can act as a spring. When the counterweight vibrates up and down due to starting or braking, the oil and gas damping provides a buffer, gradually reducing the vibration amplitude of the counterweight and protecting the counterweight steel wire rope. The balancing movable pulley group is fixed above the counterweight, and the counterweight can move up and down under the action of the counterweight steel wire rope. The winding direction of the counterweight steel wire rope on the hoisting drum is opposite to the winding direction of the lifting steel wire rope on the hoisting drum. The movement direction of the counterweight is opposite to that of the quay crane trolley hoist. The downward movement of the counterweight can offset part of the energy consumption of the quay crane trolley hoist in lifting the container, thereby achieving energy saving and consumption reduction.

[0008] To facilitate the arrangement of the counterweight wire rope, the present invention also includes a fixed balancing pulley assembly, which is fixed to the quay crane structure and located above the movable balancing pulley assembly. The counterweight wire rope is drawn from the hoist drum, passes around the fixed balancing pulley assembly, and then extends to the movable balancing pulley assembly. The movable balancing pulley assembly and the fixed balancing pulley assembly can adjust the travel of the counterweight according to different needs, improving the stability of the energy-saving system.

[0009] The external environment of a port terminal can interfere with the movement of the counterweight, and in severe cases, even affect the safe operation of the quay crane. To avoid this, the present invention installs the counterweight inside the quay crane leg column, and the balancing fixed pulley assembly is fixed to the top of the quay crane leg column. The counterweight needs to be placed at a high position, which is greatly affected by external factors such as port crosswinds. If the counterweight shakes, it is not conducive to the stability of the quay crane. Placing the counterweight in a closed environment can minimize the impact of external factors on the counterweight.

[0010] The aforementioned energy-saving quay crane counterweight system with vibration damping is designed with a counterweight positioned within the quay crane leg column. To prevent the counterweight from colliding with the inner wall of the leg column due to lateral vibration, the present invention also includes vibration-damping rollers located outside the counterweight. When the counterweight vibrates laterally, the vibration-damping rollers act as a buffer between the counterweight and the inner wall of the leg column, preventing direct impact. Furthermore, the vibration-damping rollers convert sliding friction between the counterweight and the inner wall of the leg column into rolling friction, reducing resistance to the counterweight's upward and downward movement.

[0011] The balancing movable pulley assembly described in the aforementioned quay crane counterweight energy-saving system with a vibration reduction function includes a number of movable pulleys arranged in parallel, and the axis direction of the movable pulleys is parallel to the direction of the quay crane beam. The number of fixed pulleys in the balancing fixed pulley assembly is equal to the number of movable pulleys in the balancing movable pulley assembly, and the axis of the fixed pulleys in the balancing fixed pulley assembly is parallel to the axis of the movable pulleys in the balancing movable pulley assembly. After the balancing weight wire rope is drawn out from the lifting drum, it repeatedly passes around the fixed pulleys in the balancing fixed pulley assembly and the movable pulleys in the balancing movable pulley assembly in sequence and is then fixed to the quay crane structure. The balancing movable pulley assembly and the balancing fixed pulley assembly cooperate with each other to control the stroke of the counterweight. Reducing the moving distance of the counterweight is beneficial to the stability of the quay crane structure and the energy-saving system.

[0012] The torque exerted by the counterweight on the lifting drum through the counterweight steel wire rope described in the present invention is equal in magnitude to the torque exerted on the lifting drum by the quay crane hoist and the empty container through the lifting steel wire rope, but opposite in direction. The torque exerted by the counterweight on the lifting drum can offset the torque exerted on the lifting drum by the quay crane trolley hoist and the empty container. When the quay crane trolley lifts the empty container, it only needs to overcome mechanical friction, thereby reducing some energy consumption of the quay crane in lifting the container.

[0013] The winding range of the counterweight steel wire rope described in the present invention on the hoisting drum overlaps with the winding range of the hoisting steel wire rope on the hoisting drum. In order to prevent the counterweight steel wire rope and the hoisting steel wire rope from interfering with each other, they are generally arranged at different positions on the hoisting drum. This arrangement method will cause the hoisting drum to be too long and the strength to be reduced. In the present invention, the winding direction of the counterweight steel wire rope on the hoisting drum is opposite to the winding direction of the hoisting steel wire rope on the hoisting drum, avoiding the problem of mutual interference between the counterweight steel wire rope and the hoisting steel wire rope. The overlapping winding range can ensure the strength of the hoisting drum.

[0014] The present invention includes two motors, hoist drums, and hoisting wire ropes, each positioned on either side of the reduction gearbox. The counterweight wire ropes, movable balance pulleys, counterweights, and fixed balance pulleys are each provided in pairs and symmetrically arranged on either side of the quay crane girder axis. This symmetrical arrangement optimizes the load on the quay crane structure and prevents overloading on one side, which could cause deflection.

[0015] Compared with the existing technology, the benefits of the present invention are: providing a quay crane counterweight energy-saving system with a vibration reduction function, using the counterweight to reduce the operating energy consumption of the quay crane by 25%, and at the same time effectively controlling the vibration of the counterweight, preventing the counterweight from exerting excessive tension on the counterweight wire rope, and preventing the counterweight from colliding with the quay crane structure, thereby improving the stability of the energy-saving system and the quay crane structure and protecting the quay crane structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the balanced fixed pulley group and the balanced movable pulley group in the present invention;

[0018] Figure 3 It is a schematic diagram of the arrangement of the vibration-damping rollers in the present invention.

[0019] The meaning of the accompanying numbers: 1-motor, 2-reduction gearbox, 3-lifting drum, 4-lifting wire rope, 5-balance weight wire rope, 6-balance movable pulley set, 7-balance weight, 8-lifting redirecting pulley, 9-trolley pulley set, 10-oil and gas damping, 11-balance fixed pulley set, 12-vibration damping roller.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0021] Embodiment 1 of the present invention: Figure 1 As shown, a quay crane counterweight energy-saving system with a vibration reduction function includes a motor 1, a reduction gearbox 2, a hoisting drum 3, a hoisting wire rope 4, a counterweight wire rope 5, a balancing pulley block 6, a counterweight 7, a hoisting redirecting pulley 8, a trolley pulley block 9, and an oil-gas damper 10. The motor 1, reduction gearbox 2, and hoisting drum 3 are sequentially connected in a transmission manner. One end of the hoisting wire rope 4 is wound around the hoisting drum 3, and the other end of the hoisting wire rope 4 passes around the hoisting redirecting pulley 8 and extends to the trolley pulley block 9. The hoisting redirecting pulley block 8 is fixed to one end of the quay crane girder. The motor 1 drives the hoisting drum 3 to rotate, and the hoisting wire rope 4 wound around the hoisting drum 3 moves with the rotation of the hoisting drum 3, realizing the vertical movement of the quay crane trolley hoist and lifting the container.

[0022] like Figure 1 As shown, one end of the counterweight steel wire rope 5 is wound around the hoisting drum 3. The other end of the counterweight steel wire rope 5 passes through the balancing movable pulley block 6 and is fixed to the quay crane structure via an oil-gas damper 10. The winding direction of the counterweight steel wire rope 5 on the hoisting drum 3 is opposite to the winding direction of the hoisting wire rope 4 on the hoisting drum 3. The oil-gas damper 10 is a gas spring. When the counterweight 7 vibrates vertically, the oil-gas damper 10 acts as a spring, slowly reducing the vibration amplitude of the counterweight 7, reducing the load on the counterweight steel wire rope 5 by the counterweight 7, and protecting the counterweight steel wire rope 5 and the hoisting drum 3. The balancing movable pulley block 6 is fixed above the counterweight 7, which can move up and down under the action of the counterweight steel wire rope 5. The winding direction of the counterweight wire rope 5 on the lifting drum 3 is opposite to the winding direction of the lifting wire rope 4 on the lifting drum 3. The movement directions of the counterweight 7 and the quay crane trolley hoist are opposite. When the quay crane trolley hoist rises, the counterweight 7 falls.

[0023] like Figure 2 As shown, this embodiment also includes a balancing fixed pulley group 11, which is fixedly mounted on the quay crane structure and located above the balancing movable pulley group 6. The counterweight steel wire rope 5 is drawn from the hoisting drum 3, passes around the balancing fixed pulley group 10, and then extends to the balancing movable pulley group 6. The provision of the balancing movable pulley group 11 can facilitate the arrangement of the counterweight steel wire rope 5, and can also cooperate with the balancing movable pulley group 6 to reduce the moving distance of the counterweight 7, thereby improving the stability of the quay crane structure and energy-saving system. The balancing movable pulley group 6 described in this embodiment includes four movable pulleys arranged with parallel axes, and the axis direction of the movable pulleys is parallel to the direction of the quay crane beam. The balancing fixed pulley group 11 includes four fixed pulleys arranged with parallel axes, and the axes of the fixed pulleys in the balancing fixed pulley group 11 are parallel to the axes of the movable pulleys in the balancing movable pulley group 6. After the counterweight steel wire rope 5 is led out from the hoisting drum 3, it is repeatedly passed around the fixed pulley in the balancing fixed pulley group 10 and the movable pulley in the balancing movable pulley group 6 in sequence and then fixed to the quay crane structure.

[0024] Embodiment 2 of the present invention: Figure 1 As shown, a quay crane counterweight energy-saving system with a vibration reduction function includes a motor 1, a reduction gearbox 2, a hoisting drum 3, a hoisting wire rope 4, a counterweight wire rope 5, a balancing pulley block 6, a counterweight 7, a hoisting redirecting pulley 8, a trolley pulley block 9, and an oil-gas damper 10. The motor 1, reduction gearbox 2, and hoisting drum 3 are sequentially connected in a transmission manner. One end of the hoisting wire rope 4 is wound around the hoisting drum 3, and the other end of the hoisting wire rope 4 passes around the hoisting redirecting pulley 8 and extends to the trolley pulley block 9. The hoisting redirecting pulley block 8 is fixed to one end of the quay crane girder. The motor 1 drives the hoisting drum 3 to rotate, and the hoisting wire rope 4 wound around the hoisting drum 3 moves with the rotation of the hoisting drum 3, realizing the vertical movement of the quay crane trolley hoist and lifting the container.

[0025] like Figure 1As shown, one end of the counterweight steel wire rope 5 is wound around the hoisting drum 3. The other end of the counterweight steel wire rope 5 passes through the balancing movable pulley block 6 and is fixed to the quay crane structure via an oil-gas damper 10. The winding direction of the counterweight steel wire rope 5 on the hoisting drum 3 is opposite to the winding direction of the hoisting wire rope 4 on the hoisting drum 3. The oil-gas damper 10 is a gas spring. When the counterweight 7 vibrates vertically, the oil-gas damper 10 acts as a spring, slowly reducing the vibration amplitude of the counterweight 7, reducing the load on the counterweight steel wire rope 5 by the counterweight 7, and protecting the counterweight steel wire rope 5 and the hoisting drum 3. The balancing movable pulley block 6 is fixed above the counterweight 7, which can move up and down under the action of the counterweight steel wire rope 5. The winding direction of the counterweight wire rope 5 on the lifting drum 3 is opposite to the winding direction of the lifting wire rope 4 on the lifting drum 3. The movement directions of the counterweight 7 and the quay crane trolley hoist are opposite. When the quay crane trolley hoist rises, the counterweight 7 falls.

[0026] like Figure 2 As shown, this embodiment also includes a balancing fixed pulley group 11, which is fixedly mounted on the quay crane structure and located above the balancing movable pulley group 6. The counterweight steel wire rope 5 is drawn from the hoisting drum 3, passes around the balancing fixed pulley group 10, and then extends to the balancing movable pulley group 6. The provision of the balancing movable pulley group 11 can facilitate the arrangement of the counterweight steel wire rope 5, and can also cooperate with the balancing movable pulley group 6 to reduce the moving distance of the counterweight 7, thereby improving the stability of the quay crane structure and energy-saving system. The balancing movable pulley group 6 described in this embodiment includes four movable pulleys arranged with parallel axes, and the axis direction of the movable pulleys is parallel to the direction of the quay crane beam. The balancing fixed pulley group 11 includes four fixed pulleys arranged with parallel axes, and the axes of the fixed pulleys in the balancing fixed pulley group 11 are parallel to the axes of the movable pulleys in the balancing movable pulley group 6. After the counterweight steel wire rope 5 is led out from the hoisting drum 3, it is repeatedly passed around the fixed pulley in the balancing fixed pulley group 10 and the movable pulley in the balancing movable pulley group 6 in sequence and then fixed to the quay crane structure.

[0027] like Figure 2 As shown, the torque exerted by the counterweight 7 on the lifting drum 3 through the counterweight wire rope 5 in this embodiment is equal in magnitude to the torque exerted by the quay crane hoist and the empty container on the lifting drum 3 through the lifting wire rope 4, but opposite in direction. The torque provided by the counterweight 7 and the torque provided by the quay crane trolley hoist and the empty container offset each other, which can reduce the energy consumption of the quay crane in lifting containers.

[0028] Embodiment 3 of the present invention: Figure 1As shown, a quay crane counterweight energy-saving system with a vibration reduction function includes a motor 1, a reduction gearbox 2, a hoisting drum 3, a hoisting wire rope 4, a counterweight wire rope 5, a balancing pulley block 6, a counterweight 7, a hoisting redirecting pulley 8, a trolley pulley block 9, and an oil-gas damper 10. The motor 1, reduction gearbox 2, and hoisting drum 3 are sequentially connected in a transmission manner. One end of the hoisting wire rope 4 is wound around the hoisting drum 3, and the other end of the hoisting wire rope 4 passes around the hoisting redirecting pulley 8 and extends to the trolley pulley block 9. The hoisting redirecting pulley block 8 is fixed to one end of the quay crane girder. The motor 1 drives the hoisting drum 3 to rotate, and the hoisting wire rope 4 wound around the hoisting drum 3 moves with the rotation of the hoisting drum 3, realizing the vertical movement of the quay crane trolley hoist and lifting the container.

[0029] like Figure 1 As shown, one end of the counterweight steel wire rope 5 is wound around the hoisting drum 3. The other end of the counterweight steel wire rope 5 passes through the balancing movable pulley block 6 and is fixed to the quay crane structure via an oil-gas damper 10. The winding direction of the counterweight steel wire rope 5 on the hoisting drum 3 is opposite to the winding direction of the hoisting wire rope 4 on the hoisting drum 3. The oil-gas damper 10 is a gas spring. When the counterweight 7 vibrates vertically, the oil-gas damper 10 acts as a spring, slowly reducing the vibration amplitude of the counterweight 7, reducing the load on the counterweight steel wire rope 5 by the counterweight 7, and protecting the counterweight steel wire rope 5 and the hoisting drum 3. The balancing movable pulley block 6 is fixed above the counterweight 7, which can move up and down under the action of the counterweight steel wire rope 5. The winding direction of the counterweight wire rope 5 on the lifting drum 3 is opposite to the winding direction of the lifting wire rope 4 on the lifting drum 3. The movement directions of the counterweight 7 and the quay crane trolley hoist are opposite. When the quay crane trolley hoist rises, the counterweight 7 falls.

[0030] like Figure 3 As shown, the counterweight 7 described in this embodiment is arranged inside the quay crane leg column, and the balancing fixed pulley set 11 is fixedly arranged on the top of the quay crane leg column. The counterweight 7 is arranged inside the quay crane leg column, which can prevent the crosswind of the port from interfering with the counterweight 7, thereby improving the stability of this embodiment. The lateral vibration of the counterweight 7 is reduced but still occurs. This embodiment also provides a vibration-damping roller 12, which is arranged on the outside of the counterweight 7 to prevent the counterweight 7 from directly colliding with the inner wall of the quay crane leg column and damaging the quay crane structure. At the same time, the vibration roller 12 can also convert the sliding friction between the counterweight 7 and the inner wall of the quay crane leg column into rolling friction, thereby reducing the resistance of the counterweight to the up and down movement.

[0031] like Figure 2As shown, this embodiment also includes a balancing fixed pulley group 11, which is fixedly mounted on the quay crane structure and located above the balancing movable pulley group 6. The counterweight steel wire rope 5 is drawn from the hoisting drum 3, passes around the balancing fixed pulley group 10, and then extends to the balancing movable pulley group 6. The provision of the balancing movable pulley group 11 can facilitate the arrangement of the counterweight steel wire rope 5, and can also cooperate with the balancing movable pulley group 6 to reduce the moving distance of the counterweight 7, thereby improving the stability of the quay crane structure and energy-saving system. The balancing movable pulley group 6 described in this embodiment includes four movable pulleys arranged with parallel axes, and the axis direction of the movable pulleys is parallel to the direction of the quay crane beam. The balancing fixed pulley group 11 includes four fixed pulleys arranged with parallel axes, and the axes of the fixed pulleys in the balancing fixed pulley group 11 are parallel to the axes of the movable pulleys in the balancing movable pulley group 6. After the counterweight steel wire rope 5 is led out from the hoisting drum 3, it is repeatedly passed around the fixed pulley in the balancing fixed pulley group 10 and the movable pulley in the balancing movable pulley group 6 in sequence and then fixed to the quay crane structure.

[0032] like Figure 2 As shown, the torque exerted by the counterweight 7 on the lifting drum 3 through the counterweight wire rope 5 in this embodiment is equal in magnitude to the torque exerted by the quay crane hoist and the empty container on the lifting drum 3 through the lifting wire rope 4, but opposite in direction. The torque provided by the counterweight 7 and the torque provided by the quay crane trolley hoist and the empty container offset each other, which can reduce the energy consumption of the quay crane in lifting containers.

[0033] Embodiment 4 of the present invention: Figure 1 As shown, a quay crane counterweight energy-saving system with a vibration reduction function includes a motor 1, a reduction gearbox 2, a hoisting drum 3, a hoisting wire rope 4, a counterweight wire rope 5, a balancing pulley block 6, a counterweight 7, a hoisting redirecting pulley 8, a trolley pulley block 9, and an oil-gas damper 10. The motor 1, reduction gearbox 2, and hoisting drum 3 are sequentially connected in a transmission manner. One end of the hoisting wire rope 4 is wound around the hoisting drum 3, and the other end of the hoisting wire rope 4 passes around the hoisting redirecting pulley 8 and extends to the trolley pulley block 9. The hoisting redirecting pulley block 8 is fixed to one end of the quay crane girder. The motor 1 drives the hoisting drum 3 to rotate, and the hoisting wire rope 4 wound around the hoisting drum 3 moves with the rotation of the hoisting drum 3, realizing the vertical movement of the quay crane trolley hoist and lifting the container.

[0034] like Figure 1As shown, one end of the counterweight steel wire rope 5 is wound around the hoisting drum 3. The other end of the counterweight steel wire rope 5 passes through the balancing movable pulley block 6 and is fixed to the quay crane structure via an oil-gas damper 10. The winding direction of the counterweight steel wire rope 5 on the hoisting drum 3 is opposite to the winding direction of the hoisting wire rope 4 on the hoisting drum 3. The oil-gas damper 10 is a gas spring. When the counterweight 7 vibrates vertically, the oil-gas damper 10 acts as a spring, slowly reducing the vibration amplitude of the counterweight 7, reducing the load on the counterweight steel wire rope 5 by the counterweight 7, and protecting the counterweight steel wire rope 5 and the hoisting drum 3. The balancing movable pulley block 6 is fixed above the counterweight 7, which can move up and down under the action of the counterweight steel wire rope 5. The winding direction of the counterweight wire rope 5 on the lifting drum 3 is opposite to the winding direction of the lifting wire rope 4 on the lifting drum 3. The movement directions of the counterweight 7 and the quay crane trolley hoist are opposite. When the quay crane trolley hoist rises, the counterweight 7 falls.

[0035] like Figure 3 As shown, the counterweight 7 described in this embodiment is arranged inside the quay crane leg column, and the balancing fixed pulley set 11 is fixedly arranged on the top of the quay crane leg column. The counterweight 7 is arranged inside the quay crane leg column, which can prevent the crosswind of the port from interfering with the counterweight 7, thereby improving the stability of this embodiment. The lateral vibration of the counterweight 7 is reduced but still occurs. This embodiment also provides a vibration-damping roller 12, which is arranged on the outside of the counterweight 7 to prevent the counterweight 7 from directly colliding with the inner wall of the quay crane leg column and damaging the quay crane structure. At the same time, the vibration roller 12 can also convert the sliding friction between the counterweight 7 and the inner wall of the quay crane leg column into rolling friction, thereby reducing the resistance of the counterweight to the up and down movement.

[0036] like Figure 2 As shown, this embodiment also includes a balancing fixed pulley group 11, which is fixedly mounted on the quay crane structure and located above the balancing movable pulley group 6. The counterweight steel wire rope 5 is drawn from the hoisting drum 3, passes around the balancing fixed pulley group 10, and then extends to the balancing movable pulley group 6. The provision of the balancing movable pulley group 11 can facilitate the arrangement of the counterweight steel wire rope 5, and can also cooperate with the balancing movable pulley group 6 to reduce the moving distance of the counterweight 7, thereby improving the stability of the quay crane structure and energy-saving system. The balancing movable pulley group 6 described in this embodiment includes four movable pulleys arranged with parallel axes, and the axis direction of the movable pulleys is parallel to the direction of the quay crane beam. The balancing fixed pulley group 11 includes four fixed pulleys arranged with parallel axes, and the axes of the fixed pulleys in the balancing fixed pulley group 11 are parallel to the axes of the movable pulleys in the balancing movable pulley group 6. After the counterweight steel wire rope 5 is led out from the hoisting drum 3, it is repeatedly passed around the fixed pulley in the balancing fixed pulley group 10 and the movable pulley in the balancing movable pulley group 6 in sequence and then fixed to the quay crane structure.

[0037] like Figure 2As shown, the torque exerted by the counterweight 7 on the lifting drum 3 through the counterweight wire rope 5 in this embodiment is equal in magnitude to the torque exerted by the quay crane hoist and the empty container on the lifting drum 3 through the lifting wire rope 4, but opposite in direction. The torque provided by the counterweight 7 and the torque provided by the quay crane trolley hoist and the empty container offset each other, which can reduce the energy consumption of the quay crane in lifting containers.

[0038] To save space on the hoisting drum 3 and avoid a decrease in the strength of the hoisting drum 3 due to its extension, the winding range of the counterweight steel wire rope 5 on the hoisting drum 3 in this embodiment overlaps the winding range of the hoisting wire rope 4 on the hoisting drum 3. The winding direction of the counterweight steel wire rope 5 on the hoisting drum 3 in this embodiment is opposite to the winding direction of the hoisting wire rope 4 on the hoisting drum 3, which can prevent interference between the hoisting wire rope 4 and the counterweight steel wire rope 5.

[0039] like Figure 1 As shown, in this embodiment, two motors 1, two hoist drums 3, and two hoist wire ropes 4 are each provided, arranged on either side of the reduction gearbox 2. Two counterweight wire ropes 5, two balancing movable pulleys 6, two counterweights 7, and two balancing fixed pulleys 10 are each provided and symmetrically arranged on either side of the quay crane girder axis. This symmetrical arrangement promotes structural stability and prevents uneven loads on the quay crane.

[0040] Working Principle: This invention provides a quay crane counterweight energy-saving system with vibration reduction capabilities. This system utilizes a counterweight 7 to reduce energy consumption when lifting containers. An oil-gas damper 10 is also provided to reduce the vertical vibration amplitude of the counterweight 7, thereby reducing the additional load on the counterweight wire rope 5 caused by starting or braking the counterweight 7, ensuring safe operation of the counterweight wire rope 5. Furthermore, a vibration-damping roller 12 is provided on the outside of the counterweight 7. This damping pulley 12 prevents the counterweight 7 from colliding with and potentially damaging the quay crane structure.

Claims

1. A quay crane counterweight energy-saving system with a vibration reduction function, characterized by: The invention comprises a motor (1), a reduction gear box (2), a lifting drum (3), a lifting wire rope (4), a counterweight wire rope (5), a balancing pulley block (6), a counterweight (7), a lifting redirection pulley block (8), a trolley pulley block (9) and an oil-gas damper (10). The motor (1), the reduction gear box (2) and the lifting drum (3) are sequentially connected in transmission. One end of the lifting wire rope (4) is wound around the lifting drum (3), and the other end of the lifting wire rope (4) is wound around the lifting redirection pulley block (8). The lifting and redirecting pulley group (8) is fixedly arranged at one end of the quayside bridge beam; one end of the counterweight steel wire rope (5) is wound on the lifting drum (3), and the other end of the counterweight steel wire rope (5) is fixed on the quayside bridge structure after passing through the balance movable pulley group (6) and the oil-gas damping (10), and the winding direction of the counterweight steel wire rope (5) on the lifting drum (3) is opposite to the winding direction of the lifting steel wire rope (4) on the lifting drum (3); the balance movable pulley group (6) is fixed The balancing weight (7) is fixedly arranged above the balancing weight (7), and the balancing weight (7) can move up and down under the action of the balancing weight wire rope (5); it also includes a balancing fixed pulley group (11), which is fixedly arranged on the quay crane structure and is located above the balancing movable pulley group (6), and the balancing weight wire rope (5) is led out from the lifting drum (3), bypasses the balancing fixed pulley group (11) and then extends to the balancing movable pulley group (6); the balancing movable pulley group (6) includes a plurality of movable pulleys arranged in parallel with each other, and The axis direction of the movable pulley is parallel to the direction of the quay crane beam; the number of fixed pulleys in the balanced fixed pulley group (11) is equal to the number of movable pulleys in the balanced movable pulley group (6), and the axis of the fixed pulley in the balanced fixed pulley group (11) is parallel to the axis of the movable pulley in the balanced movable pulley group (6); after the counterweight steel wire rope (5) is led out from the lifting drum (3), it is repeatedly passed around the fixed pulley in the balanced fixed pulley group (11) and the movable pulley in the balanced movable pulley group (6) in sequence and then fixed to the quay crane structure.

2. The quay crane counterweight energy-saving system with vibration reduction function according to claim 1 is characterized in that: The counterweight (7) is arranged inside the quay crane door leg column, and the balancing fixed pulley group (11) is fixedly arranged on the top of the quay crane door leg column.

3. The quay crane counterweight energy-saving system with vibration reduction function according to claim 2 is characterized in that: It also includes a vibration-damping roller (12), which is arranged outside the balancing weight (7).

4. The quay crane counterweight energy-saving system with vibration reduction function according to claim 1 is characterized in that: The torque exerted by the counterweight (7) on the lifting drum (3) through the counterweight steel wire rope (5) is equal in magnitude and opposite in direction to the torque exerted by the quay crane spreader and the empty container on the lifting drum (3) through the lifting steel wire rope (4).

5. The quay crane counterweight energy-saving system with vibration reduction function according to claim 1 is characterized in that: The winding range of the counterweight steel wire rope (5) on the lifting drum (3) coincides with the winding range of the lifting steel wire rope (4) on the lifting drum (3).

6. The quay crane counterweight energy-saving system with vibration reduction function according to claim 1 is characterized in that: The motor (1), the lifting drum (3) and the lifting wire rope (4) are each provided with two, and are respectively arranged on both sides of the reduction box (2); the counterweight wire rope (5), the balancing movable pulley group (6), the counterweight (7) and the balancing fixed pulley group (11) are each provided with two, and are symmetrically arranged on both sides of the axis of the quay crane beam.

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