A vibration-proof system for the lifting pulley of a high-speed quay crane trolley

Abstract

This invention discloses a vibration damping system for a high-speed quay crane trolley lifting pulley. The quay crane trolley frame and the lifting pulley are separately configured, and the system includes several vibration damping devices. Each vibration damping device includes a connecting seat, a hydraulic damper, and a connecting rod. The connecting seat is fixedly mounted on the quay crane trolley frame, and the hydraulic damper is vertically arranged between the quay crane trolley frame and the lifting pulley. One end of the hydraulic damper is hinged to the connecting seat, and the other end is fixedly connected to the rotation shaft of the lifting pulley via the connecting rod. This invention effectively controls the vibration of the quay crane trolley and the quay crane structure, ensuring the safety of the quay crane trolley during high-speed operation. It further improves the lifting speed of the quay crane spreader and the running speed of the quay crane trolley. The lifting speed of the quay crane trolley when lifting containers can be increased to 130 m / min, and the speed of the quay crane trolley along the quay crane beam can be increased to 380 m / min, thereby improving the loading and unloading efficiency of the quay crane.

Description

Technical Field

[0001] The invention relates to the technical field of port terminal container loading and unloading equipment, in particular to a high-speed quay crane trolley lifting pulley vibration isolation system. Background Art

[0002] With the rapid development of the world economy and my country's vigorous promotion of economic internationalization, the total volume of my country's international freight has continued to increase in recent years, and ocean transportation, as the main mode of transportation for international freight, has also developed rapidly. Port terminals are transit stations for sea and land transportation. Containers are loaded and unloaded at port terminals. The loading and unloading efficiency of port terminals determines the operating efficiency of port terminals and affects the efficiency of international freight to a certain extent. At present, container ships are developing towards large-scale, and ultra-large container ships with a carrying capacity of 24,000 TEUs have been put into use, which poses a greater challenge to the loading and unloading efficiency of port terminals.

[0003] The quay crane is the most important container loading and unloading equipment at the port terminal. The quay crane trolley hoist moves in the vertical direction through the lifting wire rope and lifting pulley to complete the lifting and placement of the container. The movement of the quay crane trolley along the quay crane beam is used to realize the transfer of the container. Therefore, the lifting speed of the quay crane trolley hoist and the running speed of the quay crane trolley directly affect the loading and unloading efficiency of the quay crane. At present, the maximum lifting speed of the quay crane trolley hoist under heavy load is 75m / min, and the maximum running speed of the quay crane trolley along the quay crane beam is 240m / min, which has reached the limit speed to ensure the stability of the quay crane structure.

[0004] The quay crane trolley hoist is connected to the quay crane trolley through a lifting wire rope and a lifting pulley. The lifting wire rope is wound around the lifting pulley. In the traditional quay crane trolley structure, the lifting pulley is fixedly connected to the quay crane trolley frame. When the quay crane trolley hoist lifts the container at too fast a speed, the tension of the lifting wire rope changes too much when the quay crane trolley hoist starts braking, which will cause the pressure of the quay crane trolley on the quay crane beam to change, causing the quay crane trolley and the quay crane trolley hoist to vibrate, and even the quay crane trolley to bounce on the quay crane beam, seriously affecting the safe operation and structural stability of the quay crane. At the same time, when the quay crane trolley runs too fast along the quay crane beam, the quay crane trolley hoist and the container will pull the lifting pulley and the quay crane trolley structure through the lifting wire rope due to inertia, causing the quay crane trolley to vibrate or causing the container to collide with the quay crane structure, which is also not conducive to the safe operation of the quay crane. Therefore, it is very difficult to further increase the lifting speed of the quay crane trolley hoist and the running speed of the quay crane trolley along the shore bridge beam. It is necessary to develop a system that can effectively control the change of the tension of the lifting wire rope. Summary of the invention

[0005] The object of the present invention is to provide a high-speed quay crane trolley lifting pulley vibration isolation system, which can weaken the tension change of the lifting wire rope and the force change between the quay crane trolley frame and the lifting pulley when the quay crane trolley is running at high speed, weaken the vibration of the quay crane trolley and the quay crane structure, protect the structure of the quay crane, and provide conditions for increasing the lifting speed of the quay crane trolley hoist and the running speed of the quay crane trolley.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a high-speed quay crane trolley lifting pulley vibration isolation system, which is used to reduce the tension change of the lifting wire rope when the quay crane trolley is running at high speed, and reduce the force change between the quay crane trolley frame and the lifting pulley. The current quay crane trolley frame is fixedly connected to the lifting pulley, and the lifting wire rope and the lifting pulley cooperate to realize the vertical movement of the quay crane trolley hoist. In the high-speed quay crane trolley lifting pulley vibration isolation system, the quay crane trolley frame and the lifting pulley are separately arranged, and a number of vibration isolation devices are added between the quay crane trolley frame and the lifting pulley. The vibration isolation device includes a connecting seat, an oil-gas damper and a connecting rod. The connecting seat is fixedly arranged on the quay crane trolley frame, and the oil-gas damper is vertically arranged between the quay crane trolley frame and the lifting pulley. One end of the oil-gas damper is hinged to the connecting seat, and the other end of the oil-gas damper is fixedly connected to the rotating shaft of the lifting pulley through the connecting rod.

[0007] When the tension of the lifting wire rope changes, the force is buffered by the vibration isolation device, and the force transmission between the lifting pulley and the quay crane trolley frame changes slowly, avoiding rapid and frequent changes in pressure and supporting force between the quay crane trolley frame and the quay crane beam, making the running speed of the quay crane trolley more stable, and providing conditions for increasing the lifting speed of the quay crane trolley hoist and the running speed of the quay crane trolley.

[0008] The oil-gas damper described in the aforementioned high-speed quay crane trolley lifting pulley vibration isolation system includes a piston rod, a piston and a cylinder body. One end of the piston rod is hinged to the connecting seat, and the other end of the piston rod is connected to the piston, and the piston is arranged in the cylinder body. The cylinder body is fixedly connected to the rotating shaft of the lifting pulley via the connecting rod. The cylinder body includes an air-filling chamber and an oil-filling chamber. The air-filling chamber is located on one side of the piston connected to the piston rod, and the oil-filling chamber is located on the other side of the piston. When the lifting pulley and the quay crane trolley frame undergo relative motion, the oil-gas damper is stretched or squeezed, and the pressure in the air-filling chamber and the oil-filling chamber changes. The oil-gas damper generates a force to resist this relative motion, so that the lifting pulley and the quay crane trolley frame tend to be stable, and the vibration amplitude is reduced. Further, the movement of the quay crane trolley hoist and the quay crane trolley under the lifting pulley is smooth.

[0009] The vibration isolation device described in the present invention also includes a rubber vibration damper, which is arranged in parallel with the oil and gas damper, one end of the rubber vibration damper is hinged to the connecting seat, and the other end of the rubber vibration damper is fixedly connected to the rotating shaft of the lifting pulley via a connecting rod. The function of the rubber vibration damper is similar to that of the oil and gas damper, and both can limit the relative movement of the lifting pulley and the quay crane trolley frame, but the oil and gas damper will generate significant heat after short-term high-frequency compression or stretching, resulting in a decrease in the working performance of the oil and gas damper. The rubber vibration damper generates less heat during use, and can be used in conjunction with the oil and gas damper to improve the stability of the vibration isolation device.

[0010] In the aforementioned high-speed quay crane trolley lifting pulley vibration isolation system, the rubber shock absorber includes a spring rod, a rubber spring and a base, one end of the spring rod is hinged to the connecting seat, the other end of the spring rod is connected to the rubber spring, the rubber spring is connected to the base, the rubber spring is arranged in the base, and the base is fixedly connected to the rotating shaft of the lifting pulley via the connecting rod. When the lifting pulley and the quay crane trolley frame are relatively displaced, the rubber spring is compressed or stretched, generating an opposite force, so that the vibration amplitude of the quay crane trolley is reduced and the movement tends to be stable.

[0011] The vibration-proof device of the present invention is provided with both oil-gas damping and rubber shock absorber. In order to ensure that the oil-gas damping and rubber shock absorber can move synchronously and prevent the lifting pulley from tilting, and the stress in the oil-gas damping and rubber shock absorber changes repeatedly, it is necessary to connect the oil-gas damping and rubber shock absorber together by using a connecting rod. The connecting rod is a T-shaped structure, and the two horizontal ends of the T-shaped structure are respectively fixedly connected to the oil-gas damping and rubber shock absorber, and one vertical end of the T-shaped structure is fixedly connected to the rotating shaft of the lifting pulley.

[0012] In order to ensure the stable connection between the lifting pulley and the quay crane trolley frame, it is necessary to set vibration-isolating devices on both sides of the lifting pulley. In the present invention, the number of vibration-isolating devices is twice the number of lifting pulleys, and each set of vibration-isolating devices is provided on both sides of the rotating shaft of each set of lifting pulleys. In conventional designs, four sets of lifting pulleys need to be set in the quay crane trolley frame to ensure the stable operation of the quay crane trolley hoist. In this case, eight sets of vibration-isolating devices are required to ensure the stability of the structure of the four sets of lifting pulleys.

[0013] Compared with the prior art, the invention is beneficial in that it provides a high-speed quay crane trolley hoisting pulley vibration-proof system, which reduces the tension change of the hoisting wire rope and the force change between the quay crane trolley frame and the hoisting pulley when the quay crane trolley moves at high speed, effectively controls the vibration of the quay crane trolley and the quay crane structure, avoids the collision and bounce between the quay crane trolley and the quay crane structure, ensures the safety of the high-speed operation of the quay crane trolley, and further improves the lifting speed of the quay crane trolley hoisting device and the running speed of the quay crane trolley. The lifting speed of the quay crane trolley to lift the container can be increased to 130m / min, and the speed of the quay crane trolley along the quay crane beam can be increased to 380m / min, thereby improving the loading and unloading efficiency of the quay crane. At the same time, the mutual cooperation of oil-gas damping and rubber shock absorber is used to ensure the stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the present invention;

[0015] Figure 2 is a top view of the present invention;

[0016] Figure 3 It is a left side view of the present invention;

[0017] Figure 4 It is a structural schematic diagram of the oil-gas damping in the present invention;

[0018] Figure 5 It is a structural schematic diagram of the rubber vibration damper in the present invention;

[0019] Figure 6 It is a top view of the frame of the quay crane trolley in the present invention;

[0020] Figure 7 It is a front view of the quay crane trolley frame of the present invention.

[0021] The meaning of the accompanying numbers: 1-lifting wire rope, 2-shore crane trolley frame, 3-lifting pulley, 4-connecting seat, 5-oil and gas damping, 6-connecting rod, 7-piston rod, 8-piston, 9-cylinder body, 10-air filling chamber, 11-oil filling chamber, 12-rubber shock absorber, 13-spring rod, 14-rubber spring, 15-base.

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0023] Embodiment 1 of the present invention: A high-speed quay crane trolley hoisting pulley vibration-proof system is used to reduce the change in the tension of the hoisting wire rope 1 when the quay crane trolley is running at high speed, reduce the change in the force between the quay crane trolley frame 2 and the hoisting pulley 3, prevent the quay crane trolley and the quay crane structure from vibrating due to the frequency change of the force between the quay crane trolley frame 2 and the hoisting pulley 3, and improve the stability of the quay crane trolley when running at high speed. Figure 1 , Figure 2 or Figure 3 As shown, the quay crane trolley frame 2 and the lifting pulley 3 in this embodiment are separately arranged, and are connected and fixed by a vibration-proof device arranged between the quay crane trolley frame 2 and the lifting pulley 3, so that the rigid connection between the quay crane trolley frame 2 and the lifting pulley 3 is changed to an elastic connection. Figure 6 As shown, four groups of lifting pulleys 3 are arranged in the quay crane trolley frame 2 of the present embodiment. In order to ensure the stable connection of the four groups of lifting pulleys 3, a total of eight groups of vibration isolation devices are included in the present embodiment. The vibration isolation devices include a connecting seat 4, an oil-gas damper 5 and a connecting rod 6. The connecting seat 4 is fixed on the quay crane trolley frame 2, and the oil-gas damper 5 is vertically arranged between the quay crane trolley frame 2 and the lifting pulley 3. One end of the oil-gas damper 5 is hinged to the connecting seat 4, and the other end of the oil-gas damper 5 is fixedly connected to the rotating shaft of the lifting pulley 3 via the connecting rod 6.

[0024] like Figure 7 As shown, when the lifting speed of the quay crane trolley hoist is too fast or the running speed of the quay crane trolley is too fast, the quay crane trolley hoist will generate tension on the lifting pulley 3 through the lifting wire rope 1, and the vibration isolation device between the lifting pulley 3 and the quay crane trolley frame 2 can play a buffering role, so that the force between the lifting pulley 3 and the quay crane trolley frame 2 changes slowly, preventing the tension of the lifting wire rope 1 from changing frequently, causing the quay crane trolley to vibrate or bounce, and threatening the safe operation of the quay crane trolley, while providing conditions for increasing the lifting speed of the quay crane trolley hoist and the running speed of the quay crane trolley.

[0025] like Figure 4 As shown, the oil-gas damper 5 in this embodiment includes a piston rod 7, a piston 8 and a cylinder body 9. One end of the piston rod 7 is hinged to the connecting seat 3, and the other end of the piston rod 7 is connected to the piston 8. The piston 8 is arranged in the cylinder body 9; the cylinder body 9 is fixedly connected to the rotating shaft of the lifting pulley 3 through the connecting rod 6. The cylinder body 9 includes an air-filling chamber 10 and an oil-filling chamber 11. The air-filling chamber 10 is located on one side of the piston 8 connected to the piston rod 7, and the oil-filling chamber 11 is located on the other side of the piston 8. When the lifting pulley 3 and the quay crane trolley frame 2 move relative to each other, the piston rod 7 drives the piston 8 to move, compressing the air-filling chamber 10 or the oil-filling chamber 11, and the pressure in the air-filling chamber 10 and the oil-filling chamber 11 changes, generating a force to resist the movement of the piston 8, which is transmitted to the lifting pulley 3, so that the movement of the lifting pulley 3 gradually stabilizes and the vibration amplitude of the quay crane trolley gradually decreases.

[0026] Embodiment 2 of the present invention: A high-speed quay crane trolley hoisting pulley vibration-proof system is used to reduce the tension change of the hoisting wire rope 1 when the quay crane trolley is running at high speed, reduce the force change between the quay crane trolley frame 2 and the hoisting pulley 3, prevent the quay crane trolley and the quay crane structure from vibrating due to the frequency change of the force between the quay crane trolley frame 2 and the hoisting pulley 3, and improve the stability of the quay crane trolley when running at high speed. Figure 1 , Figure 2 or Figure 3 As shown, the quay crane trolley frame 2 and the lifting pulley 3 in this embodiment are separately arranged, and are connected and fixed by a vibration-proof device arranged between the quay crane trolley frame 2 and the lifting pulley 3, so that the rigid connection between the quay crane trolley frame 2 and the lifting pulley 3 is changed to an elastic connection. Figure 6 As shown, four groups of lifting pulleys 3 are arranged in the quay crane trolley frame 2 of this embodiment. In order to ensure the stable connection of the four groups of lifting pulleys 3, eight groups of vibration-isolating devices are included in this embodiment, and the vibration-isolating devices include a connecting seat 4, an oil-gas damper 5, a connecting rod 6 and a rubber shock absorber 12. The connecting seat 4 is fixedly arranged on the quay crane trolley frame 2, and the oil-gas damper 5 is vertically arranged between the quay crane trolley frame 2 and the lifting pulley 3. One end of the oil-gas damper 5 is hinged to the connecting seat 4, and the other end of the oil-gas damper 5 is fixedly connected to the rotating shaft of the lifting pulley 3 through the connecting rod 6. The rubber shock absorber 12 is arranged in parallel with the oil-gas damper 5, one end of the rubber shock absorber 12 is hinged to the connecting seat 4, and the other end of the rubber shock absorber 12 is fixedly connected to the rotating shaft of the lifting pulley 3 through the connecting rod 6.

[0027] like Figure 7 As shown, when the lifting speed of the quay crane trolley hoist is too fast or the running speed of the quay crane trolley is too fast, the quay crane trolley hoist will generate tension on the lifting pulley 3 through the lifting wire rope 1, and the vibration isolation device between the lifting pulley 3 and the quay crane trolley frame 2 can play a buffering role, so that the force between the lifting pulley 3 and the quay crane trolley frame 2 changes slowly, preventing the tension of the lifting wire rope 1 from changing frequently, causing the quay crane trolley to vibrate or bounce, and threatening the safe operation of the quay crane trolley, while providing conditions for increasing the lifting speed of the quay crane trolley hoist and the running speed of the quay crane trolley.

[0028] like Figure 4As shown, the oil-gas damper 5 in this embodiment includes a piston rod 7, a piston 8 and a cylinder body 9. One end of the piston rod 7 is hinged to the connecting seat 3, and the other end of the piston rod 7 is connected to the piston 8. The piston 8 is arranged in the cylinder body 9; the cylinder body 9 is fixedly connected to the rotating shaft of the lifting pulley 3 through the connecting rod 6. The cylinder body 9 includes an air-filling chamber 10 and an oil-filling chamber 11. The air-filling chamber 10 is located on one side of the piston 8 connected to the piston rod 7, and the oil-filling chamber 11 is located on the other side of the piston 8. When the lifting pulley 3 and the quay crane trolley frame 2 move relative to each other, the piston rod 7 drives the piston 8 to move, compressing the air-filling chamber 10 or the oil-filling chamber 11, and the pressure in the air-filling chamber 10 and the oil-filling chamber 11 changes, generating a force to resist the movement of the piston 8, which is transmitted to the lifting pulley 3, so that the movement of the lifting pulley 3 gradually stabilizes and the vibration amplitude of the quay crane trolley gradually decreases.

[0029] like Figure 5 As shown, the rubber vibration damper 12 in this embodiment includes a spring rod 13, a rubber spring 14 and a base 15, one end of the spring rod 13 is hinged to the connecting seat 3, the other end of the spring rod 13 is connected to the rubber spring 14, the rubber spring 14 is connected to the base 15, the rubber spring 14 is arranged in the base 15, and the base 15 is fixedly connected to the rotating shaft of the lifting pulley 3 through the connecting rod 6. The rubber vibration damper 12 realizes the function of buffering and vibration reduction through the compression or extension of the rubber spring 14.

[0030] Both the oil-gas damper 5 and the rubber shock absorber 12 can play a buffering role and limit the relative movement between the lifting pulley and the quay crane trolley frame, but both the oil-gas damper 5 and the rubber shock absorber 12 have certain defects. The oil-gas damper 5 will generate obvious heat after short-term high-frequency compression or stretching, resulting in a decrease in the working performance of the oil-gas damper 5 and a lack of stability. The rubber shock absorber 12 relies on the rubber spring 14 to achieve a buffering effect. As a coil spring, the rubber spring 14 will change its deformation after long-term use, and its stiffness and stability will decrease. Therefore, the oil-gas damper 5 and the rubber shock absorber 12 are used in combination in this embodiment to improve the stability of the vibration isolation device.

[0031] Embodiment 3 of the present invention: A high-speed quay crane trolley hoisting pulley vibration-proof system is used to reduce the change in the tension of the hoisting wire rope 1 when the quay crane trolley is running at high speed, reduce the change in the force between the quay crane trolley frame 2 and the hoisting pulley 3, prevent the quay crane trolley and the quay crane structure from vibrating due to the frequency change of the force between the quay crane trolley frame 2 and the hoisting pulley 3, and improve the stability of the quay crane trolley when running at high speed. Figure 1 , Figure 2 or Figure 3As shown, the quay crane trolley frame 2 and the lifting pulley 3 in this embodiment are separately arranged, and are connected and fixed by a vibration-proof device arranged between the quay crane trolley frame 2 and the lifting pulley 3, so that the rigid connection between the quay crane trolley frame 2 and the lifting pulley 3 is changed to an elastic connection. Figure 6 As shown, four groups of lifting pulleys 3 are arranged in the quay crane trolley frame 2 of this embodiment. In order to ensure the stable connection of the four groups of lifting pulleys 3, eight groups of vibration-isolating devices are included in this embodiment, and the vibration-isolating devices include a connecting seat 4, an oil-gas damper 5, a connecting rod 6 and a rubber shock absorber 12. The connecting seat 4 is fixedly arranged on the quay crane trolley frame 2, and the oil-gas damper 5 is vertically arranged between the quay crane trolley frame 2 and the lifting pulley 3. One end of the oil-gas damper 5 is hinged to the connecting seat 4, and the other end of the oil-gas damper 5 is fixedly connected to the rotating shaft of the lifting pulley 3 through the connecting rod 6. The rubber shock absorber 12 is arranged in parallel with the oil-gas damper 5, one end of the rubber shock absorber 12 is hinged to the connecting seat 4, and the other end of the rubber shock absorber 12 is fixedly connected to the rotating shaft of the lifting pulley 3 through the connecting rod 6.

[0032] like Figure 7 As shown, when the lifting speed of the quay crane trolley hoist is too fast or the running speed of the quay crane trolley is too fast, the quay crane trolley hoist will generate tension on the lifting pulley 3 through the lifting wire rope 1, and the vibration isolation device between the lifting pulley 3 and the quay crane trolley frame 2 can play a buffering role, so that the force between the lifting pulley 3 and the quay crane trolley frame 2 changes slowly, preventing the tension of the lifting wire rope 1 from changing frequently, causing the quay crane trolley to vibrate or bounce, and threatening the safe operation of the quay crane trolley, while providing conditions for increasing the lifting speed of the quay crane trolley hoist and the running speed of the quay crane trolley.

[0033] like Figure 4 As shown, the oil-gas damper 5 in this embodiment includes a piston rod 7, a piston 8 and a cylinder body 9. One end of the piston rod 7 is hinged to the connecting seat 3, and the other end of the piston rod 7 is connected to the piston 8. The piston 8 is arranged in the cylinder body 9; the cylinder body 9 is fixedly connected to the rotating shaft of the lifting pulley 3 through the connecting rod 6. The cylinder body 9 includes an air-filling chamber 10 and an oil-filling chamber 11. The air-filling chamber 10 is located on one side of the piston 8 connected to the piston rod 7, and the oil-filling chamber 11 is located on the other side of the piston 8. When the lifting pulley 3 and the quay crane trolley frame 2 move relative to each other, the piston rod 7 drives the piston 8 to move, compressing the air-filling chamber 10 or the oil-filling chamber 11, and the pressure in the air-filling chamber 10 and the oil-filling chamber 11 changes, generating a force to resist the movement of the piston 8, which is transmitted to the lifting pulley 3, so that the movement of the lifting pulley 3 gradually stabilizes and the vibration amplitude of the quay crane trolley gradually decreases.

[0034] like Figure 5As shown, the rubber vibration damper 12 in this embodiment includes a spring rod 13, a rubber spring 14 and a base 15, one end of the spring rod 13 is hinged to the connecting seat 3, the other end of the spring rod 13 is connected to the rubber spring 14, the rubber spring 14 is connected to the base 15, the rubber spring 14 is arranged in the base 15, and the base 15 is fixedly connected to the rotating shaft of the lifting pulley 3 through the connecting rod 6. The rubber vibration damper 12 realizes the function of buffering and vibration reduction through the compression or extension of the rubber spring 14.

[0035] Both the oil-gas damper 5 and the rubber shock absorber 12 can play a buffering role and limit the relative movement between the lifting pulley and the quay crane trolley frame, but both the oil-gas damper 5 and the rubber shock absorber 12 have certain defects. The oil-gas damper 5 will generate obvious heat after short-term high-frequency compression or stretching, resulting in a decrease in the working performance of the oil-gas damper 5 and a lack of stability. The rubber shock absorber 12 relies on the rubber spring 14 to achieve a buffering effect. As a coil spring, the rubber spring 14 will change its deformation after long-term use, and its stiffness and stability will decrease. Therefore, the oil-gas damper 5 and the rubber shock absorber 12 are used in combination in this embodiment to improve the stability of the vibration isolation device.

[0036] like Figure 2 or Figure 3 As shown, the connecting rod 6 in this embodiment is a T-shaped structure, the two lateral ends of the T-shaped structure are fixedly connected to the oil-gas damper 5 and the rubber shock absorber 12 respectively, and one vertical end of the T-shaped structure is fixedly connected to the rotating shaft of the lifting pulley 3. The connecting rod 6 of the T-shaped structure connects the oil-gas damper 5 and the rubber shock absorber 12 together to prevent the oil-gas damper 5 and the rubber shock absorber 12 from moving out of sync, causing the lifting pulley 3 to tilt and the trolley hoisting device of the quay crane to run unsteadily.

[0037] Working principle of the present invention: During the start-up or braking process of the quay crane trolley hoist or when the quay crane trolley hoist is running smoothly, due to the elasticity of the lifting wire rope 1, the quay crane trolley hoist will vibrate, and the tension of the lifting wire rope 1 will also change, causing the pressure of the quay crane trolley on the quay crane beam to change, resulting in vibration of the quay crane trolley and the quay crane beam, and even bouncing of the quay crane trolley, which seriously affects the normal operation of the quay crane. When the quay crane trolley moves along the quay crane beam, due to the inertia of the quay crane trolley hoist and the container, the quay crane trolley hoist will generate a pulling force in an inclined direction on the lifting pulley 3 through the lifting wire rope 1, and the direction of the pulling force gradually changes to the vertical direction. This change in the direction of the pulling force will also cause the quay crane trolley to vibrate, affecting the safe operation of the quay crane trolley. The faster the lifting speed of the quay crane trolley hoist and the running speed of the quay crane trolley, the greater the vibration amplitude of the quay crane trolley, which is the key reason for limiting the speed increase of the quay crane trolley.

[0038] The present invention arranges the lifting pulley 3 and the quay crane trolley frame 2 separately and connects them through a vibration isolation device in the middle, so as to buffer the tension change of the lifting wire rope 1 and reduce the movement amplitude of the lifting pulley 3 relative to the quay crane trolley frame 2, which can effectively limit the vibration of the quay crane trolley and make the movement of the quay crane trolley more stable, thus providing conditions for improving the lifting speed of the quay crane trolley hoist and the running speed of the quay crane trolley.

Claims

1. A high-speed quay crane trolley hoisting pulley vibration isolation system, used to reduce the tension change of the hoisting wire rope (1) when the quay crane trolley is running at high speed, and reduce the force change between the quay crane trolley frame (2) and the hoisting pulley (3), characterized by: The quay crane trolley frame (2) and the lifting pulley (3) are separately arranged, and the high-speed quay crane trolley lifting pulley vibration isolation system includes a plurality of vibration isolation devices, and the vibration isolation devices include a connecting seat (4), an oil-gas damper (5) and a connecting rod (6). The connecting seat (4) is fixedly arranged on the quay crane trolley frame (2), and the oil-gas damper (5) is vertically arranged between the quay crane trolley frame (2) and the lifting pulley (3). One end of the oil-gas damper (5) is hinged to the connecting seat (4), and the other end of the oil-gas damper (5) is fixedly connected to the rotating shaft of the lifting pulley (3) via the connecting rod (6); the oil-gas damper (5) includes a piston rod (7), a piston (8) and a cylinder body (9), and one end of the piston rod (7) is hinged to the connecting seat (3). The other end of the piston rod (7) is connected to the piston (8), and the piston (8) is arranged in the cylinder body (9); the cylinder body (9) is fixedly connected to the rotating shaft of the lifting pulley (3) via the connecting rod (6), and the cylinder body (9) includes an air filling chamber (10) and an oil filling chamber (11), the air filling chamber (10) is located on the side where the piston (8) is connected to the piston rod (7), and the oil filling chamber (11) is located on the other side of the piston (8); the vibration isolation device also includes a rubber shock absorber (12), the rubber shock absorber (12) is arranged in parallel with the oil and gas damping (5), one end of the rubber shock absorber (12) is hinged to the connecting seat (4), and the other end of the rubber shock absorber (12) is fixedly connected to the rotating shaft of the lifting pulley (3) via the connecting rod (6).

2. The high-speed quay crane trolley hoisting pulley vibration isolation system according to claim 1 is characterized by: The rubber vibration damper (12) comprises a spring rod (13), a rubber spring (14) and a base (15); one end of the spring rod (13) is hinged to the connecting seat (3); the other end of the spring rod (13) is connected to the rubber spring (14); the rubber spring (14) is connected to the base (15); the rubber spring (14) is arranged in the base (15); and the base (15) is fixedly connected to the rotating shaft of the lifting pulley (3) via a connecting rod (6).

3. The high-speed quay crane trolley hoisting pulley vibration isolation system according to claim 1 is characterized by: The connecting rod (6) is a T-shaped structure, the two horizontal ends of the T-shaped structure are fixedly connected to the oil and gas damper (5) and the rubber shock absorber (12) respectively, and the vertical end of the T-shaped structure is fixedly connected to the rotating shaft of the lifting pulley (3).

4. The high-speed quay crane trolley hoisting pulley vibration isolation system according to claim 1 is characterized by: The number of the vibration-isolating devices is twice the number of the lifting pulleys (3), and a group of vibration-isolating devices is respectively provided on both sides of the rotating shaft of each group of lifting pulleys (3).

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