A reduction gearbox counterweight energy-saving system for a crossing quay crane

Abstract

The present invention discloses a reduction gearbox counterweight energy-saving system for a crossing quay crane, comprising an upper trolley energy-saving system and a lower trolley energy-saving system, wherein the lifting mechanisms in the upper trolley energy-saving system and the lower trolley energy-saving system are connected to the energy-saving mechanism in a transmission manner. One end of the lifting wire rope is led out of the lifting mechanism, and the other end of the lifting wire rope is connected to the trolley hoist. One end of the counterweight wire rope is led out of the energy-saving mechanism, and the other end of the counterweight wire rope is fixed to the quay crane structure after passing through the counterweight movable pulley. The counterweight movable pulley is fixed to the counterweight. The present invention saves 25% of the energy consumption of the quay crane without reducing the performance of the quay crane. The counterweight is controlled by the energy-saving mechanism, and the length of the lifting drum does not need to be extended, thereby ensuring the strength of the lifting drum. The winding of the counterweight wire rope in the present invention is simple, does not interfere with other wire ropes in the operation of the quay crane, and has a stable structure. The present invention also provides vibration reduction measures to further improve the stability of 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 reduction gearbox counterweight energy-saving system for a crossing quay crane. Background Art

[0002] International logistics has a significant impact on the prosperity and development of the global economy. Port shipping is the most important form of international logistics, accounting for over two-thirds of total international trade volume. 90% of my country's total import and export freight flows through port shipping. With the development of international logistics, port shipping has also seen an increase in volume. To accommodate this growing volume and reduce transportation costs, container ships are becoming larger and larger. Currently, Triple-E container ships with a capacity of up to 24,000 TEUs have entered service, increasing the pressure on port terminals to handle loading and unloading. As handling volumes increase, port terminal operating costs also rise, particularly due to the increasing energy consumption of loading and unloading equipment at ports.

[0003] Quay cranes are the most important container handling equipment at ports. Traditional quay cranes are equipped with only one trolley, resulting in low loading and unloading efficiency and difficulty in adapting to the increasing volume of loading and unloading tasks. Cross-type quay cranes, equipped with two upper and lower trolleys, are the future development direction of quay cranes. Cross-type quay cranes operate both trolleys simultaneously, improving efficiency while significantly increasing energy consumption.

[0004] Traditional quay cranes primarily employ two energy-saving measures. The first involves reducing the number of quay cranes used and lowering their operating parameters. While this approach can reduce energy consumption, it significantly impacts the crane's operational performance and loading and unloading efficiency, hindering port terminal operations. A second energy-saving approach involves utilizing a counterweight to offset some of the energy consumed by the crane lifting containers. The counterweight is controlled by a counterweight wire rope. There are two main methods for winding the counterweight wire rope: one is directly connected to the quay crane's spreader. Multiple wire ropes are arranged on the spreader, which can interfere with each other, making the winding of the counterweight wire rope complex and challenging. The other method involves winding the counterweight wire rope around a hoisting drum. This method requires a longer hoisting drum, which reduces its strength and reduces the quay crane's load capacity. Cross-type quay cranes, equipped with two upper and lower trolleys, have a more complex wire rope arrangement. To prevent interference between the equipment and reduce energy consumption, an energy-saving system for cross-type quay cranes is needed. Summary of the Invention

[0005] The purpose of the present invention is to provide a reduction gearbox counterweight energy-saving system for a crossing-type quay crane, which utilizes the counterweight to reduce the energy consumption of the upper and lower trolleys in the crossing-type quay crane without affecting the operating parameters and working efficiency of the quay crane, while simplifying the wire rope arrangement and avoiding interference between the equipment and the wire rope.

[0006] To address the above-mentioned technical problems, the present invention adopts the following technical solution: a reduction gearbox counterweight energy-saving system for a traversing quay crane includes an upper trolley energy-saving system and a lower trolley energy-saving system, each designed to reduce the lifting energy consumption of the upper trolley sling and the lower trolley sling, respectively. The upper trolley energy-saving system and the lower trolley energy-saving system are similar in composition, each including a lifting mechanism, an energy-saving mechanism, a lifting wire rope, a counterweight wire rope, a counterweight movable pulley, and a counterweight. The lifting mechanism is transmission-connected to the energy-saving mechanism, and movement of the lifting mechanism drives movement of the energy-saving mechanism. One end of the lifting wire rope is led out of the lifting mechanism, and the other end is connected to the trolley sling. The lifting mechanism uses the lifting wire rope to achieve vertical movement of the upper trolley sling or the lower trolley sling. One end of the counterweight wire rope is led out of the energy-saving mechanism, and the other end of the counterweight wire rope passes through the counterweight movable pulley and is fixed to the quay crane structure. The counterweight movable pulley is fixed to the counterweight. The energy-saving mechanism uses the counterweight wire rope and the counterweight movable pulley to realize the vertical movement of the counterweight, offsetting part of the energy consumption of the trolley spreader, spreader rack and container up and down movement, thus playing a role in energy saving and consumption reduction.

[0007] The lifting mechanism in the upper trolley energy-saving system of the present invention differs in structure from the lifting mechanism in the lower trolley energy-saving system. The lifting mechanism in the upper trolley energy-saving system includes an electric motor, a lifting reduction gearbox, and two lifting drums. The electric motor is in transmission connection with the lifting reduction gearbox, and the two lifting drums are both in transmission connection with the lifting reduction gearbox. The two lifting drums are respectively arranged on both sides of the lifting reduction gearbox to ensure that the lifting and lowering distances on both sides of the upper trolley hoist are consistent and prevent lateral deviation. One end of the lifting wire rope is wound around the lifting drum. As the lifting drum rotates, the lifting wire rope is retracted and released, driving the upper trolley hoist to move up and down.

[0008] In the through-type quay crane, the lower trolley runs on the outside of the quay crane beam, and the width in the middle of the lower trolley is relatively large. Therefore, the lifting mechanism in the lower trolley energy-saving system described in the present invention is divided into two parts, namely the left lifting mechanism and the right lifting mechanism. The left lifting mechanism and the right lifting mechanism include an electric motor, a lifting reduction box and a lifting drum. The electric motor, the lifting reduction box and the lifting drum are connected in sequence. One end of the lifting wire rope is wound around the lifting drum to realize the vertical movement of the lower trolley hoist.

[0009] The lower trolley energy-saving system described in the aforementioned reduction gearbox counterweight energy-saving system for a traversing quay crane also includes a floating coupling, the ends of which are respectively connected to two lifting reduction gearboxes. Because the lifting mechanism in the lower trolley energy-saving system is divided into two parts, to prevent the difference in speed between the motors in the left and right lifting mechanisms, which would lead to asynchronous lifting and lowering of the two ends of the lower trolley spreader, the present invention provides a floating coupling. The floating coupling is respectively connected to the lifting reduction gearbox in the left and right lifting mechanisms, ensuring that the two parts rotate at the same speed, and the two ends of the lower trolley spreader rise and fall synchronously.

[0010] The energy-saving mechanism described in the present invention includes a balancing reduction gearbox and a balancing drum, which are sequentially connected in a transmission manner. One end of the counterweight wire rope is wound around the balancing drum. The torque exerted on the balancing drum by the counterweight via the balancing weight wire rope is in the opposite direction to the torque exerted on the hoist drum by the trolley hoist and container via the hoist wire rope. That is, when the trolley hoist rises, the counterweight descends, and when the trolley hoist descends, the counterweight ascends. Furthermore, by providing a movable pulley for the counterweight and adjusting the reduction ratio of the balancing reduction gearbox, the travel distance of the counterweight can be reduced to that of the trolley hoist, thereby improving system stability.

[0011] There are two balancing reduction gearboxes and balancing drums described in the present invention. Each lifting drum is sequentially connected to a balancing reduction gearbox and a balancing drum for transmission. The structure is symmetrical. Balance weights are arranged on both sides of the same quay crane beam, which is beneficial to the stability of the quay crane structure.

[0012] The torque exerted by the counterweight on the balancing drum through the counterweight steel wire rope in the present invention is equal in magnitude to the torque exerted by the trolley spreader, the spreader frame and the empty container on the lifting drum through the lifting steel wire rope, and they cancel each other out. When the trolley spreader lifts the empty container, it only needs to overcome the mechanical friction resistance, thus saving energy consumption when lifting the trolley spreader and the empty container.

[0013] The lifting and energy-saving mechanisms in the upper and lower trolley energy-saving systems described in this invention are both located within the quay crane machine room. The quay crane machine room also houses the pitching mechanism, upper trolley travel mechanism, and lower trolley travel mechanism. The addition of a lower trolley to a traversing quay crane requires additional equipment necessary for its operation, and the newly added energy-saving mechanisms in this invention also need to be uniformly located within the machine room.

[0014] The present invention arranges the counterweight inside the leg column of the quay crane. The counterweight is located in a closed space, which can prevent the interference of port crosswinds and the like on the counterweight and the counterweight wire rope, and prevent additional load from being caused, which affects the safety of the quay crane.

[0015] The counterweight will vibrate during the process of starting and stopping, generating additional force on the energy-saving mechanism, which is not conducive to the stability of the energy-saving system. Therefore, the present invention also provides an oil-gas damper and a vibration-damping roller in the upper trolley energy-saving system and the lower trolley energy-saving system. One end of the oil-gas damper is connected to the end of the counterweight wire rope away from the balancing mechanism, and the other end of the oil-gas damper is fixedly connected to the quay crane structure. When the counterweight vibrates up and down, the oil-gas damper can act as a spring, gradually weakening the vibration of the counterweight and reducing the additional force generated on the energy-saving system. The vibration-damping roller is arranged on the outside of the counterweight. When the counterweight vibrates laterally, the vibration-damping roller forms a pad between the counterweight and the inner wall of the quay crane leg column to prevent the counterweight from hitting the quay crane leg column. At the same time, the vibration-damping roller can also avoid direct friction between the counterweight and the quay crane leg column, reducing the resistance to the up and down movement of the counterweight.

[0016] Compared with existing technologies, the present invention offers advantages in providing a reduction gearbox counterweight energy-saving system for a quay crane, saving 25% of the crane's energy consumption without compromising its performance. Furthermore, the system incorporates an energy-saving mechanism that controls the counterweight, eliminating the need to extend the hoist drum and ensuring its strength. The present invention also simplifies the winding of the counterweight wire rope, preventing interference with other wire ropes in the quay crane's operation and resulting in a stable structure. Furthermore, the present invention incorporates vibration reduction measures to further enhance the stability of the quay crane structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a structural diagram of the energy-saving system of the upper trolley in the present invention;

[0019] Figure 3 It is a structural diagram of the energy-saving system of the lower trolley in the present invention;

[0020] Figure 4 It is a structural diagram of the lifting mechanism and energy-saving mechanism in the upper trolley energy-saving system of the present invention;

[0021] Figure 5 It is a structural diagram of the lifting mechanism and energy-saving mechanism in the lower trolley energy-saving system of the present invention;

[0022] Figure 6 This is a top view of the quay crane room in the present invention;

[0023] Figure 7 It is a schematic diagram of the arrangement of the oil-gas damping and vibration-reducing rollers in the present invention.

[0024] The meaning of the accompanying figures: 1-upper trolley energy-saving system, 2-lower trolley energy-saving system, 3-lifting mechanism, 4-energy-saving mechanism, 5-lifting wire rope, 6-balance weight wire rope, 7-balance weight movable pulley, 8-balance weight, 9-motor, 10-lifting reduction gearbox, 11-lifting drum, 12-left lifting mechanism, 13-right lifting mechanism, 14-floating coupling, 15-balance reduction gearbox, 16-balance drum, 17-shore crane machine room, 18-oil and gas damping, 19-vibration damping roller, 20-door leg column, 21-upper trolley hoist, 22-lower trolley hoist.

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0026] Embodiment 1 of the present invention: Figure 1 As shown, a reduction gearbox counterweight energy-saving system for a through-type quay crane includes an upper trolley energy-saving system 1 and a lower trolley energy-saving system 2, which are respectively used to realize the lifting of the upper trolley sling 21 and the lower trolley sling 22, and reduce the energy consumption of lifting containers. The upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are similar in structure, both including a lifting mechanism 3, an energy-saving mechanism 4, a lifting wire rope 5, a counterweight wire rope 6, a counterweight movable pulley 7 and a counterweight 8. The lifting mechanism 3 is connected to the energy-saving mechanism 4 in a transmission manner. The function of the lifting mechanism 3 is to realize the lifting and lowering of the upper trolley sling 21 or the lower trolley sling 22 in the vertical direction. At the same time, the lifting mechanism 3 also drives the energy-saving mechanism 4 to move. One end of the lifting wire rope 5 is led out from the lifting mechanism 3, and the other end of the lifting wire rope 5 is connected to the trolley sling. One end of the counterweight steel wire rope 6 is led out of the energy-saving mechanism 4, and the other end of the counterweight steel wire rope 6 is fixed to the quay crane structure after passing through the counterweight movable pulley 7. The counterweight movable pulley 7 is fixed to the counterweight 8. The energy-saving mechanism 4 uses the counterweight steel wire rope 6 and the counterweight movable pulley 7 to control the vertical movement of the counterweight 8. The counterweight 8 can offset some of the energy consumption of the up and down movement of the container, thereby saving energy and reducing consumption. The installation of the energy-saving mechanism 4 eliminates the need for contact between the counterweight steel wire rope 6 and the steel wire rope arranged on the trolley hoist, and there is no interference, which simplifies the winding method of the counterweight steel wire rope 6.

[0027] In this embodiment, the structures of the lifting mechanism 3 in the upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are different. Figure 2 or Figure 4As shown, the lifting mechanism 3 in the upper trolley energy-saving system 1 in this embodiment includes a motor 9, a lifting reduction box 10 and two lifting drums 11. The motor 9 is transmission-connected to the lifting reduction box 10, and the two lifting drums 11 are both transmission-connected to the lifting reduction box 10. The two lifting drums 11 are respectively arranged on both sides of the lifting reduction box 10 to ensure that the lifting and lowering amplitudes of both ends of the upper trolley hoist 21 are consistent. One end of the lifting wire rope 5 is wound around the lifting drum 11, and the lifting drum 11 rotates, driving the lifting wire rope 5 to tighten or loosen, thereby realizing the vertical movement of the upper trolley hoist 21.

[0028] like Figure 3 As shown in FIG5 , the lifting mechanism 3 in the lower trolley energy-saving system 2 in this embodiment includes a left lifting mechanism 12 and a right lifting mechanism 13. The left lifting mechanism 12 and the right lifting mechanism 13 each include a motor 9, a lifting reduction gearbox 10, and a lifting drum 11. The motor 9, the lifting reduction gearbox 10, and the lifting drum 11 are sequentially connected in a transmission manner. One end of the lifting wire rope 5 is wound around the lifting drum 11. The left lifting mechanism 12 and the right lifting mechanism 13 respectively control the movement of the two ends of the lower trolley hoist 22. In order to prevent the inconsistent rotation speed of the motor 9 in the left lifting mechanism 12 and the right lifting mechanism 13 or the inconsistent transmission of the lifting reduction box 10, which leads to inconsistent lifting amplitudes at the two ends of the lower trolley hoist 22, lifting difficulties or even safety accidents, this embodiment also provides a floating coupling 14. The two ends of the floating coupling 14 are respectively connected to the two lifting reduction boxes 10 to ensure that the rotation speed of the lifting reduction boxes 10 in the left lifting mechanism 12 and the right lifting mechanism 13 is the same, and the two ends of the lower trolley hoist 22 rise and fall synchronously.

[0029] like Figure 2 or Figure 3 As shown, the energy-saving mechanism 4 described in this embodiment includes a balancing reduction gearbox 15 and a balancing drum 16. The hoisting drum 11, balancing reduction gearbox 15, and balancing drum 16 are sequentially connected in a transmission manner. Rotation of the hoisting drum 11 drives the balancing reduction gearbox 15 and balancing drum 16. One end of the counterweight wire rope 6 is wound around the balancing drum 16. The torque exerted on the balancing drum 16 by the counterweight wire rope 6 is in the opposite direction to the torque exerted on the hoisting drum 11 by the trolley spreader and the container via the hoisting wire rope 5. When the trolley spreader rises, the counterweight 8 descends; when the quay crane trolley descends, the counterweight 8 ascends. The torque exerted on the balancing drum 16 by the counterweight wire rope 6 partially offsets the torque exerted on the hoisting drum 11 by the trolley spreader and the container via the hoisting wire rope 5. This arrangement achieves energy savings for the quay crane. At the same time, the balancing weight movable pulley 7 can make the moving distance of the balancing weight 8 half of the moving distance of the trolley hoist, which is convenient for the arrangement of the balancing weight 8 and beneficial to the stability of the quay crane structure.

[0030] like Figure 1As shown, the energy-saving mechanism 4 described in this embodiment comprises two balancing reduction gearboxes 15 and two balancing drums 16. Each hoisting drum 11 is sequentially connected to a balancing reduction gearbox 15 and a balancing drum 16. The energy-saving mechanisms 4 in the upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are symmetrically arranged on either side of the hoisting mechanism 3. Similarly, the counterweights 8 are also symmetrically arranged to prevent uneven force on the quay crane, which could affect the stability of the quay crane structure.

[0031] Embodiment 2 of the present invention: Figure 1 As shown, a reduction gearbox counterweight energy-saving system for a through-type quay crane includes an upper trolley energy-saving system 1 and a lower trolley energy-saving system 2, which are respectively used to realize the lifting of the upper trolley sling 21 and the lower trolley sling 22, and reduce the energy consumption of lifting containers. The upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are similar in structure, both including a lifting mechanism 3, an energy-saving mechanism 4, a lifting wire rope 5, a counterweight wire rope 6, a counterweight movable pulley 7 and a counterweight 8. The lifting mechanism 3 is connected to the energy-saving mechanism 4 in a transmission manner. The function of the lifting mechanism 3 is to realize the lifting and lowering of the upper trolley sling 21 or the lower trolley sling 22 in the vertical direction. At the same time, the lifting mechanism 3 also drives the energy-saving mechanism 4 to move. One end of the lifting wire rope 5 is led out from the lifting mechanism 3, and the other end of the lifting wire rope 5 is connected to the trolley sling. One end of the counterweight steel wire rope 6 is led out of the energy-saving mechanism 4, and the other end of the counterweight steel wire rope 6 is fixed to the quay crane structure after passing through the counterweight movable pulley 7. The counterweight movable pulley 7 is fixed to the counterweight 8. The energy-saving mechanism 4 uses the counterweight steel wire rope 6 and the counterweight movable pulley 7 to control the vertical movement of the counterweight 8. The counterweight 8 can offset some of the energy consumption of the up and down movement of the container, thereby saving energy and reducing consumption. The installation of the energy-saving mechanism 4 eliminates the need for contact between the counterweight steel wire rope 6 and the steel wire rope arranged on the trolley hoist, and there is no interference, which simplifies the winding method of the counterweight steel wire rope 6.

[0032] In this embodiment, the structures of the lifting mechanism 3 in the upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are different. Figure 2 or Figure 4 As shown, the lifting mechanism 3 in the upper trolley energy-saving system 1 in this embodiment includes a motor 9, a lifting reduction box 10 and two lifting drums 11. The motor 9 is transmission-connected to the lifting reduction box 10, and the two lifting drums 11 are both transmission-connected to the lifting reduction box 10. The two lifting drums 11 are respectively arranged on both sides of the lifting reduction box 10 to ensure that the lifting and lowering amplitudes of both ends of the upper trolley hoist 21 are consistent. One end of the lifting wire rope 5 is wound around the lifting drum 11, and the lifting drum 11 rotates, driving the lifting wire rope 5 to tighten or loosen, thereby realizing the vertical movement of the upper trolley hoist 21.

[0033] like Figure 3As shown in FIG5 , the lifting mechanism 3 in the lower trolley energy-saving system 2 in this embodiment includes a left lifting mechanism 12 and a right lifting mechanism 13. The left lifting mechanism 12 and the right lifting mechanism 13 each include a motor 9, a lifting reduction gearbox 10, and a lifting drum 11. The motor 9, the lifting reduction gearbox 10, and the lifting drum 11 are sequentially connected in a transmission manner. One end of the lifting wire rope 5 is wound around the lifting drum 11. The left lifting mechanism 12 and the right lifting mechanism 13 respectively control the movement of the two ends of the lower trolley hoist 22. In order to prevent the inconsistent rotation speed of the motor 9 in the left lifting mechanism 12 and the right lifting mechanism 13 or the inconsistent transmission of the lifting reduction box 10, which leads to inconsistent lifting amplitudes at the two ends of the lower trolley hoist 22, lifting difficulties or even safety accidents, this embodiment also provides a floating coupling 14. The two ends of the floating coupling 14 are respectively connected to the two lifting reduction boxes 10 to ensure that the rotation speed of the lifting reduction boxes 10 in the left lifting mechanism 12 and the right lifting mechanism 13 is the same, and the two ends of the lower trolley hoist 22 rise and fall synchronously.

[0034] like Figure 2 or Figure 3 As shown, the energy-saving mechanism 4 described in this embodiment includes a balancing reduction gearbox 15 and a balancing drum 16. The hoisting drum 11, balancing reduction gearbox 15, and balancing drum 16 are sequentially connected in a transmission manner. Rotation of the hoisting drum 11 drives the balancing reduction gearbox 15 and balancing drum 16. One end of the counterweight wire rope 6 is wound around the balancing drum 16. The torque exerted on the balancing drum 16 by the counterweight wire rope 6 is in the opposite direction to the torque exerted on the hoisting drum 11 by the trolley spreader and the container via the hoisting wire rope 5. When the trolley spreader rises, the counterweight 8 descends; when the quay crane trolley descends, the counterweight 8 ascends. The torque exerted on the balancing drum 16 by the counterweight wire rope 6 partially offsets the torque exerted on the hoisting drum 11 by the trolley spreader and the container via the hoisting wire rope 5. This arrangement achieves energy savings for the quay crane. At the same time, the balancing weight movable pulley 7 can make the moving distance of the balancing weight 8 half of the moving distance of the trolley hoist, which is convenient for the arrangement of the balancing weight 8 and beneficial to the stability of the quay crane structure.

[0035] like Figure 1 As shown, the energy-saving mechanism 4 described in this embodiment comprises two balancing reduction gearboxes 15 and two balancing drums 16. Each hoisting drum 11 is sequentially connected to a balancing reduction gearbox 15 and a balancing drum 16. The energy-saving mechanisms 4 in the upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are symmetrically arranged on either side of the hoisting mechanism 3. Similarly, the counterweights 8 are also symmetrically arranged to prevent uneven force on the quay crane, which could affect the stability of the quay crane structure.

[0036] In order to further improve the accuracy of this embodiment, the torque applied by the counterweight 8 to the counterweight drum 16 through the counterweight wire rope 6 is equal in magnitude and opposite in direction to the torque applied by the trolley sling, the sling rack and the empty container to the lifting drum 11 through the lifting wire rope 5, and can offset each other. When the trolley sling lifts the empty container, it only needs to overcome the mechanical friction resistance, thereby saving energy consumption when lifting the trolley sling and the empty container.

[0037] Embodiment 3 of the present invention: Figure 1 As shown, a reduction gearbox counterweight energy-saving system for a through-type quay crane includes an upper trolley energy-saving system 1 and a lower trolley energy-saving system 2, which are respectively used to realize the lifting of the upper trolley sling 21 and the lower trolley sling 22, and reduce the energy consumption of lifting containers. The upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are similar in structure, both including a lifting mechanism 3, an energy-saving mechanism 4, a lifting wire rope 5, a counterweight wire rope 6, a counterweight movable pulley 7 and a counterweight 8. The lifting mechanism 3 is connected to the energy-saving mechanism 4 in a transmission manner. The function of the lifting mechanism 3 is to realize the lifting and lowering of the upper trolley sling 21 or the lower trolley sling 22 in the vertical direction. At the same time, the lifting mechanism 3 also drives the energy-saving mechanism 4 to move. One end of the lifting wire rope 5 is led out from the lifting mechanism 3, and the other end of the lifting wire rope 5 is connected to the trolley sling. One end of the counterweight steel wire rope 6 is led out of the energy-saving mechanism 4, and the other end of the counterweight steel wire rope 6 is fixed to the quay crane structure after passing through the counterweight movable pulley 7. The counterweight movable pulley 7 is fixed to the counterweight 8. The energy-saving mechanism 4 uses the counterweight steel wire rope 6 and the counterweight movable pulley 7 to control the vertical movement of the counterweight 8. The counterweight 8 can offset some of the energy consumption of the up and down movement of the container, thereby saving energy and reducing consumption. The installation of the energy-saving mechanism 4 eliminates the need for contact between the counterweight steel wire rope 6 and the steel wire rope arranged on the trolley hoist, and there is no interference, which simplifies the winding method of the counterweight steel wire rope 6.

[0038] In this embodiment, the structures of the lifting mechanism 3 in the upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are different. Figure 2 or Figure 4 As shown, the lifting mechanism 3 in the upper trolley energy-saving system 1 in this embodiment includes a motor 9, a lifting reduction box 10 and two lifting drums 11. The motor 9 is transmission-connected to the lifting reduction box 10, and the two lifting drums 11 are both transmission-connected to the lifting reduction box 10. The two lifting drums 11 are respectively arranged on both sides of the lifting reduction box 10 to ensure that the lifting and lowering amplitudes of both ends of the upper trolley hoist 21 are consistent. One end of the lifting wire rope 5 is wound around the lifting drum 11, and the lifting drum 11 rotates, driving the lifting wire rope 5 to tighten or loosen, thereby realizing the vertical movement of the upper trolley hoist 21.

[0039] like Figure 3As shown in FIG5 , the lifting mechanism 3 in the lower trolley energy-saving system 2 in this embodiment includes a left lifting mechanism 12 and a right lifting mechanism 13. The left lifting mechanism 12 and the right lifting mechanism 13 each include a motor 9, a lifting reduction gearbox 10, and a lifting drum 11. The motor 9, the lifting reduction gearbox 10, and the lifting drum 11 are sequentially connected in a transmission manner. One end of the lifting wire rope 5 is wound around the lifting drum 11. The left lifting mechanism 12 and the right lifting mechanism 13 respectively control the movement of the two ends of the lower trolley hoist 22. In order to prevent the inconsistent rotation speed of the motor 9 in the left lifting mechanism 12 and the right lifting mechanism 13 or the inconsistent transmission of the lifting reduction box 10, which leads to inconsistent lifting amplitudes at the two ends of the lower trolley hoist 22, lifting difficulties or even safety accidents, this embodiment also provides a floating coupling 14. The two ends of the floating coupling 14 are respectively connected to the two lifting reduction boxes 10 to ensure that the rotation speed of the lifting reduction boxes 10 in the left lifting mechanism 12 and the right lifting mechanism 13 is the same, and the two ends of the lower trolley hoist 22 rise and fall synchronously.

[0040] like Figure 2 or Figure 3 As shown, the energy-saving mechanism 4 described in this embodiment includes a balancing reduction gearbox 15 and a balancing drum 16. The hoisting drum 11, balancing reduction gearbox 15, and balancing drum 16 are sequentially connected in a transmission manner. Rotation of the hoisting drum 11 drives the balancing reduction gearbox 15 and balancing drum 16. One end of the counterweight wire rope 6 is wound around the balancing drum 16. The torque exerted on the balancing drum 16 by the counterweight wire rope 6 is in the opposite direction to the torque exerted on the hoisting drum 11 by the trolley spreader and the container via the hoisting wire rope 5. When the trolley spreader rises, the counterweight 8 descends; when the quay crane trolley descends, the counterweight 8 ascends. The torque exerted on the balancing drum 16 by the counterweight wire rope 6 partially offsets the torque exerted on the hoisting drum 11 by the trolley spreader and the container via the hoisting wire rope 5. This arrangement achieves energy savings for the quay crane. At the same time, the balancing weight movable pulley 7 can make the moving distance of the balancing weight 8 half of the moving distance of the trolley hoist, which is convenient for the arrangement of the balancing weight 8 and beneficial to the stability of the quay crane structure.

[0041] like Figure 1 As shown, the energy-saving mechanism 4 described in this embodiment comprises two balancing reduction gearboxes 15 and two balancing drums 16. Each hoisting drum 11 is sequentially connected to a balancing reduction gearbox 15 and a balancing drum 16. The energy-saving mechanisms 4 in the upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are symmetrically arranged on either side of the hoisting mechanism 3. Similarly, the counterweights 8 are also symmetrically arranged to prevent uneven force on the quay crane, which could affect the stability of the quay crane structure.

[0042] In order to further improve the accuracy of this embodiment, the torque applied by the counterweight 8 to the counterweight drum 16 through the counterweight wire rope 6 is equal in magnitude and opposite in direction to the torque applied by the trolley sling, the sling rack and the empty container to the lifting drum 11 through the lifting wire rope 5, and can offset each other. When the trolley sling lifts the empty container, it only needs to overcome the mechanical friction resistance, thereby saving energy consumption when lifting the trolley sling and the empty container.

[0043] like Figure 6 As shown, the lifting mechanism 3 and energy-saving mechanism 4 of the upper trolley energy-saving system 1 and lower trolley energy-saving system 2 described in this embodiment are both arranged in parallel within the quay crane machine room 17, without interfering with each other. The quay crane machine room 17 also houses other equipment required for the normal operation of the quay crane, such as the pitch mechanism, upper trolley travel mechanism, and lower trolley travel mechanism. Placing key operating equipment within the quay crane machine room 17 facilitates unified management and maintenance.

[0044] like Figure 1 As shown, the counterweight 8 described in this embodiment is installed inside the portal leg column 20 of the quay crane. Placing the counterweight 8 in a closed space prevents the external environment from interfering with the up and down movement of the counterweight 8, and avoids excessive shaking of the counterweight 8 causing additional load on the equipment mechanism of this embodiment, thereby preventing safety hazards.

[0045] Embodiment 4 of the present invention: Figure 1 As shown, a reduction gearbox counterweight energy-saving system for a through-type quay crane includes an upper trolley energy-saving system 1 and a lower trolley energy-saving system 2, which are respectively used to realize the lifting of the upper trolley sling 21 and the lower trolley sling 22, and reduce the energy consumption of lifting containers. The upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are similar in structure, both including a lifting mechanism 3, an energy-saving mechanism 4, a lifting wire rope 5, a counterweight wire rope 6, a counterweight movable pulley 7 and a counterweight 8. The lifting mechanism 3 is connected to the energy-saving mechanism 4 in a transmission manner. The function of the lifting mechanism 3 is to realize the lifting and lowering of the upper trolley sling 21 or the lower trolley sling 22 in the vertical direction. At the same time, the lifting mechanism 3 also drives the energy-saving mechanism 4 to move. One end of the lifting wire rope 5 is led out from the lifting mechanism 3, and the other end of the lifting wire rope 5 is connected to the trolley sling. One end of the counterweight steel wire rope 6 is led out of the energy-saving mechanism 4, and the other end of the counterweight steel wire rope 6 is fixed to the quay crane structure after passing through the counterweight movable pulley 7. The counterweight movable pulley 7 is fixed to the counterweight 8. The energy-saving mechanism 4 uses the counterweight steel wire rope 6 and the counterweight movable pulley 7 to control the vertical movement of the counterweight 8. The counterweight 8 can offset some of the energy consumption of the up and down movement of the container, thereby saving energy and reducing consumption. The installation of the energy-saving mechanism 4 eliminates the need for contact between the counterweight steel wire rope 6 and the steel wire rope arranged on the trolley hoist, and there is no interference, which simplifies the winding method of the counterweight steel wire rope 6.

[0046] In this embodiment, the structures of the lifting mechanism 3 in the upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are different. Figure 2 or Figure 4 As shown, the lifting mechanism 3 in the upper trolley energy-saving system 1 in this embodiment includes a motor 9, a lifting reduction box 10 and two lifting drums 11. The motor 9 is transmission-connected to the lifting reduction box 10, and the two lifting drums 11 are both transmission-connected to the lifting reduction box 10. The two lifting drums 11 are respectively arranged on both sides of the lifting reduction box 10 to ensure that the lifting and lowering amplitudes of both ends of the upper trolley hoist 21 are consistent. One end of the lifting wire rope 5 is wound around the lifting drum 11, and the lifting drum 11 rotates, driving the lifting wire rope 5 to tighten or loosen, thereby realizing the vertical movement of the upper trolley hoist 21.

[0047] like Figure 3 As shown in FIG5 , the lifting mechanism 3 in the lower trolley energy-saving system 2 in this embodiment includes a left lifting mechanism 12 and a right lifting mechanism 13. The left lifting mechanism 12 and the right lifting mechanism 13 each include a motor 9, a lifting reduction gearbox 10, and a lifting drum 11. The motor 9, the lifting reduction gearbox 10, and the lifting drum 11 are sequentially connected in a transmission manner. One end of the lifting wire rope 5 is wound around the lifting drum 11. The left lifting mechanism 12 and the right lifting mechanism 13 respectively control the movement of the two ends of the lower trolley hoist 22. In order to prevent the inconsistent rotation speed of the motor 9 in the left lifting mechanism 12 and the right lifting mechanism 13 or the inconsistent transmission of the lifting reduction box 10, which leads to inconsistent lifting amplitudes at the two ends of the lower trolley hoist 22, lifting difficulties or even safety accidents, this embodiment also provides a floating coupling 14. The two ends of the floating coupling 14 are respectively connected to the two lifting reduction boxes 10 to ensure that the rotation speed of the lifting reduction boxes 10 in the left lifting mechanism 12 and the right lifting mechanism 13 is the same, and the two ends of the lower trolley hoist 22 rise and fall synchronously.

[0048] like Figure 2 or Figure 3As shown, the energy-saving mechanism 4 described in this embodiment includes a balancing reduction gearbox 15 and a balancing drum 16. The hoisting drum 11, balancing reduction gearbox 15, and balancing drum 16 are sequentially connected in a transmission manner. Rotation of the hoisting drum 11 drives the balancing reduction gearbox 15 and balancing drum 16. One end of the counterweight wire rope 6 is wound around the balancing drum 16. The torque exerted on the balancing drum 16 by the counterweight wire rope 6 is in the opposite direction to the torque exerted on the hoisting drum 11 by the trolley spreader and the container via the hoisting wire rope 5. When the trolley spreader rises, the counterweight 8 descends; when the quay crane trolley descends, the counterweight 8 ascends. The torque exerted on the balancing drum 16 by the counterweight wire rope 6 partially offsets the torque exerted on the hoisting drum 11 by the trolley spreader and the container via the hoisting wire rope 5. This arrangement achieves energy savings for the quay crane. At the same time, the balancing weight movable pulley 7 can make the moving distance of the balancing weight 8 half of the moving distance of the trolley hoist, which is convenient for the arrangement of the balancing weight 8 and beneficial to the stability of the quay crane structure.

[0049] like Figure 1 As shown, the energy-saving mechanism 4 described in this embodiment comprises two balancing reduction gearboxes 15 and two balancing drums 16. Each hoisting drum 11 is sequentially connected to a balancing reduction gearbox 15 and a balancing drum 16. The energy-saving mechanisms 4 in the upper trolley energy-saving system 1 and the lower trolley energy-saving system 2 are symmetrically arranged on either side of the hoisting mechanism 3. Similarly, the counterweights 8 are also symmetrically arranged to prevent uneven force on the quay crane, which could affect the stability of the quay crane structure.

[0050] In order to further improve the accuracy of this embodiment, the torque applied by the counterweight 8 to the counterweight drum 16 through the counterweight wire rope 6 is equal in magnitude and opposite in direction to the torque applied by the trolley sling, the sling rack and the empty container to the lifting drum 11 through the lifting wire rope 5, and can offset each other. When the trolley sling lifts the empty container, it only needs to overcome the mechanical friction resistance, thereby saving energy consumption when lifting the trolley sling and the empty container.

[0051] like Figure 6 As shown, the lifting mechanism 3 and energy-saving mechanism 4 of the upper trolley energy-saving system 1 and lower trolley energy-saving system 2 described in this embodiment are both arranged in parallel within the quay crane machine room 17, without interfering with each other. The quay crane machine room 17 also houses other equipment required for the normal operation of the quay crane, such as the pitch mechanism, upper trolley travel mechanism, and lower trolley travel mechanism. Placing key operating equipment within the quay crane machine room 17 facilitates unified management and maintenance.

[0052] like Figure 1As shown, the counterweight 8 described in this embodiment is installed inside the portal leg column 20 of the quay crane. Placing the counterweight 8 in a closed space prevents the external environment from interfering with the up and down movement of the counterweight 8, and avoids excessive shaking of the counterweight 8 causing additional load on the equipment mechanism of this embodiment, thereby preventing safety hazards.

[0053] like Figure 7 As shown, this embodiment also includes an oil-gas damper 18 and a vibration-damping roller 19. One end of the oil-gas damper 18 is connected to the end of the counterweight wire rope 6 away from the balancing mechanism 4, and the other end is fixedly connected to the quay crane structure. The vibration-damping roller 19 is located outside the counterweight 8. As the counterweight 8 moves up and down, it generates vibrations that can affect the normal operation of the equipment. Therefore, the vibration of the counterweight 8 needs to be controlled. The oil-gas damper 18 can reduce the vertical vibration of the counterweight 8 and lower its amplitude. The vibration-damping roller 19 is fixedly mounted outside the counterweight 8. When the counterweight 8 vibrates laterally, it forms a cushion between the counterweight 8 and the inner wall of the quay crane leg column 20, preventing the counterweight 8 from colliding with the quay crane leg column 20. The vibration-damping roller 19 also prevents direct friction between the counterweight 8 and the quay crane leg column 20, reducing the resistance to the counterweight 8's vertical movement. In this embodiment, the vibration-damping roller 19 is made of rubber.

[0054] Working Principle of the Invention: The present invention provides a reduction gearbox and counterweight energy-saving system for a quay crane that utilizes a counterweight 8 to reduce the crane's energy consumption. A counterweight reduction gearbox 15 is also provided, eliminating the need to directly connect the counterweight wire rope 6 to the trolley spreader or the hoisting drum 11. The rotation of the hoisting drum 11, while simultaneously raising and lowering the trolley spreader, also affects the rotation of the counterweight drum 16. During the descent of the counterweight 8, the torque exerted on the counterweight wire rope 6 on the counterweight drum 16 partially offsets the torque exerted on the hoisting drum 11 by the trolley spreader and container via the hoisting wire rope 5, thereby achieving energy savings for the quay crane.

[0055] The counterweight steel wire rope 6 in the present invention is not directly connected to the trolley sling, avoiding interference with the steel wire rope on the trolley sling, simplifying the winding method of the steel wire rope. At the same time, the counterweight steel wire rope 6 is wound on the balancing drum 16. Compared with the traditional method of winding it on the lifting drum 11, the present invention does not need to extend the length of the lifting drum 11, thereby ensuring the strength of the lifting drum 11, which is beneficial to the stability of the quay crane structure and normal operation.

Claims

1. A reduction gearbox counterweight energy-saving system for a traversing quay crane, characterized by: The utility model comprises an upper trolley energy-saving system (1) and a lower trolley energy-saving system (2), wherein the upper trolley energy-saving system (1) and the lower trolley energy-saving system (2) both comprise a lifting mechanism (3), an energy-saving mechanism (4), a lifting steel wire rope (5), a counterweight steel wire rope (6), a counterweight movable pulley (7) and a counterweight (8), wherein the lifting mechanism (3) is transmission-connected to the energy-saving mechanism (4); one end of the lifting steel wire rope (5) is led out from the lifting mechanism (3), and the other end of the lifting steel wire rope (5) is connected to the trolley hoist; one end of the counterweight steel wire rope (6) is led out from the energy-saving mechanism (4), and the other end of the counterweight steel wire rope (6) is fixed to the quay crane structure after passing through the counterweight movable pulley (7); the counterweight movable pulley (7) is fixed to the counterweight (8); The lifting mechanism (3) in the upper trolley energy-saving system (1) includes an electric motor (9), a lifting reduction gearbox (10) and two lifting drums (11); the electric motor (9) in the upper trolley energy-saving system (1) is connected to the lifting reduction gearbox (10) in a transmission manner; the two lifting drums (11) in the upper trolley energy-saving system (1) are connected to the lifting reduction gearbox (10) in the upper trolley energy-saving system (1), and the two lifting drums (11) in the upper trolley energy-saving system (1) are respectively arranged on both sides of the lifting reduction gearbox (10); one end of the lifting wire rope (5) is wound around the lifting drum (11) in the upper trolley energy-saving system (1); The lifting mechanism (3) in the lower trolley energy-saving system (2) includes a left lifting mechanism (12) and a right lifting mechanism (13), and the left lifting mechanism (12) and the right lifting mechanism (13) both include an electric motor (9), a lifting reduction gearbox (10) and a lifting drum (11), and the electric motor (9), the lifting reduction gearbox (10) and the lifting drum (11) in the left lifting mechanism (12) and the right lifting mechanism (13) are sequentially connected by transmission from the inside to the outside; the lower trolley energy-saving system (2) also includes a floating coupling (14), and the two ends of the floating coupling (14) are respectively connected to the two corresponding lifting reduction gearboxes (10) in the left lifting mechanism (12) and the right lifting mechanism (13); The energy-saving mechanism (4) includes a balancing reduction gearbox (15) and a balancing drum (16), and the hoisting drum (11), the balancing reduction gearbox (15) and the balancing drum (16) are sequentially connected in transmission; one end of the balancing weight wire rope (6) is wound on the balancing drum (16), and the torque exerted by the balancing weight (8) on the balancing drum (16) through the balancing weight wire rope (6) is opposite in direction to the torque exerted by the trolley hoist and the container on the hoisting drum (11) through the lifting wire rope (5); The upper trolley energy-saving system (1) and the lower trolley energy-saving system (2) both further include an oil-gas damper (18) and a vibration-damping roller (19), one end of the oil-gas damper (18) is connected to the end of the counterweight steel wire rope (6) away from the energy-saving mechanism (4), and the other end of the oil-gas damper (18) is fixedly connected to the quay crane structure; the vibration-damping roller (19) is arranged on the outside of the counterweight (8).

2. The reduction gearbox counterweight energy-saving system for a quay crane according to claim 1 is characterized in that: The lifting mechanism (3) and the energy-saving mechanism (4) in the upper trolley energy-saving system (1) and the lower trolley energy-saving system (2) are both arranged in the quay crane machine room (17).

3. The reduction gearbox counterweight energy-saving system for a quay crane according to claim 1 is characterized in that: The counterweight (8) is located inside the portal leg column (20) of the quay crane.

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