Anti-swing hoisting device of marine engine room electric travelling crane

Abstract

The utility model discloses an anti-swing hoisting device of a marine engine room electric crane, which comprises a truss system and an electric hoist, the electric hoist is movably arranged on the truss system, and a pendulum bob type damping mechanism is arranged at the joint of a lifting hook and a sling of the electric hoist. The pendulum bob type damping mechanism comprises a pendulum bob capable of swinging freely and a damping bowl fixed relative to the lifting hook, and the pendulum bob counteracts load swinging through centrifugal force. According to the utility model, the pendulum bob type damping mechanism utilizes centrifugal force and frictional resistance to actively inhibit load swinging, so that the problem of swinging of a traditional shipborne electric hoisting system during hoisting operation is solved, and the hoisting stability and safety are improved.

Description

Technical Field

[0001] This utility model belongs to the field of shipboard engine room crane technology, and particularly relates to an anti-sway hoisting device for an electric crane in a ship's engine room. Background Technology

[0002] In cargo hoisting operations in ship engine rooms, the load swaying problem of electric trolley systems seriously threatens operational safety and efficiency. Traditional anti-sway technologies mostly rely on electronic control systems, which use sensors to detect swaying and adjust motor speeds to achieve dynamic balance. However, in the complex and special environment of ship engine rooms, such as high humidity, high vibration, and electromagnetic interference, electronic components are prone to failure, leading to a sharp drop in system reliability. In addition, some mechanical damping devices (such as spring shock absorbers or hydraulic buffers) can only passively absorb vertical vibrations, and their effect on suppressing horizontal swaying is limited. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides an anti-sway lifting device for an electric crane in the engine room of a ship. By using a pendulum damping mechanism to actively suppress load swaying through centrifugal force and frictional resistance, the swaying problem of traditional shipborne electric lifting systems during lifting operations is solved.

[0004] Technical solution: To achieve the above objectives, this utility model provides an anti-sway lifting device for an electric gantry crane in a ship's engine room, comprising a gantry system and an electric hoist. The electric hoist is movably mounted on the gantry system. A pendulum-type damping mechanism is provided at the connection between the hook and the sling of the electric hoist. The pendulum-type damping mechanism includes a freely swinging pendulum and a damping cup fixed relative to the hook. The pendulum counteracts the load swaying through centrifugal force.

[0005] Furthermore, the pendulum damping mechanism also includes a frame, with a sling connected to the top of the frame and a hook fixedly connected to the bottom of the frame; the damping cup is fixedly installed relative to the frame via mounting ears, and the pendulum is swung and suspended at the top of the frame via a movable joint on its own pendulum rod, so that the pendulum extends into the damping cup.

[0006] Furthermore, the connecting member is a ball joint structure.

[0007] Furthermore, the pendulum is a metal sphere, and the outer surface of the pendulum is in clearance fit with the inner surface of the damping cup, generating frictional resistance when swinging.

[0008] Furthermore, a friction pad is fitted to the inner wall of the damping cup, and the pendulum generates frictional resistance by sliding and contacting the friction pad and the damping cup when it swings.

[0009] Furthermore, a sling hook is provided at the top of the frame, and the sling of the electric hoist is hung on the sling hook.

[0010] Furthermore, the bottom of the frame is provided with a hook pin and a hook mounting hole, the top of the hook is provided with a threaded post, the threaded post passes through the hook mounting hole from bottom to top, the hook is positioned by the hook pin and fastened by a nut that mates with the threaded post.

[0011] Furthermore, the gantry system includes a main trolley traveling beam, a traveling trolley, a secondary trolley traveling beam, and a traveling trolley arranged sequentially from top to bottom. The main trolley traveling beam is welded to the inner top of the ship's engine room, and the electric hoist is installed on the frame of the traveling trolley. The electric hoist moves between the bow and stern via the traveling trolley and between the port and starboard sides via the traveling trolley, thereby realizing the movement and hoisting of objects within the engine room.

[0012] Beneficial effects: This utility model actively suppresses load swaying by using a pendulum-type damping mechanism to utilize centrifugal force and frictional resistance. By offsetting the swaying kinetic energy with centrifugal force and resisting the swaying force with friction, the load gradually returns to the equilibrium position, solving the swaying problem of traditional shipborne electric hoisting systems during hoisting operations and improving hoisting stability and safety. Attached Figure Description

[0013] Figure 1 This is a side view of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of a pendulum damping mechanism. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figure 1 As shown, an anti-sway lifting device for an electric gantry crane in a ship's engine room includes a gantry system and an electric hoist. The electric hoist is movably mounted on the gantry system. The gantry system includes, from top to bottom, a main trolley traveling beam 1, a traveling trolley 2, a secondary trolley traveling beam 3, and a secondary trolley 4. The main trolley traveling beam 1 is welded to the inner top of the ship's engine room. The electric hoist is mounted on the frame of the secondary trolley 4. The electric hoist moves between the bow and stern via the traveling trolley 2 and between the port and starboard sides via the secondary trolley 4, enabling the movement and lifting of objects within the engine room. Figure 1 and Figure 2As shown, a pendulum-type damping mechanism 6 is provided at the connection between the hook 7 and the sling 5 of the electric hoist. The pendulum-type damping mechanism 6 includes a freely swinging pendulum 61 and a damping cup 62 fixed relative to the hook 7. The pendulum 61 counteracts the load swaying through centrifugal force. More specifically, the pendulum 61 is a metal sphere, and the outer surface of the pendulum 61 is in clearance fit with the inner surface of the damping cup 62, generating frictional resistance during swaying. This utility model actively suppresses load swaying by utilizing centrifugal force and frictional resistance through the pendulum-type damping mechanism 6, solving the swaying problem of traditional shipborne electric hoisting systems during hoisting operations, and improving hoisting stability and safety.

[0017] like Figure 2 As shown, the pendulum-type damping mechanism 6 also includes a frame 63, with a sling 5 connected to the top of the frame 63 and a hook 7 fixedly connected to the bottom of the frame. The damping cup 62 is fixedly installed relative to the frame 63 via mounting ears. The pendulum 61 is swung and suspended inside the top of the frame 63 via a movable joint 65 on its own pendulum rod 64, allowing the pendulum 61 to extend into the damping cup 62. A friction pad 66 is fitted into the inner wall of the damping cup 62. When the pendulum 61 swings, it slides into contact with the friction pad 66 and the damping cup 62, generating frictional resistance. The friction pad 66 is made of a high-friction coefficient material, such as a rubber lining or a copper-based composite material.

[0018] The principle of how centrifugal force counteracts load sway in this invention is as follows:

[0019] 1) Swing Trigger: When the electric hoist is hoisting a load, if the load swings due to the start and stop of travel or the swaying of the ship, the hook 7 will be displaced laterally, and the pendulum 61 will lag behind the movement of the hook 7 due to inertia.

[0020] 2) Centrifugal force: During the swing of the hook 7, the pendulum 61 is driven by centrifugal force, causing the pendulum 61 to be thrown outward and come into contact with the friction pad 66 inside the damping cup 62.

[0021] 3) Energy dissipation: When the pendulum 61 comes into contact with the friction pad 66 inside the damping bowl 62, the frictional resistance converts the kinetic energy of the swing into heat energy, thereby suppressing the swing amplitude.

[0022] For example, when the load swings to the right, the hook 7 moves to the right accordingly, and the pendulum 61 shifts to the left due to inertia. At this time, the pendulum 61 is thrown outward by centrifugal force, thus contacting the friction pad 66 inside the damping cup 62. The friction force resists the kinetic energy of the swing, causing the load to gradually return to the equilibrium position.

[0023] To expand the swing adaptation range (360° all-round coverage), the live joint 65 is a ball joint structure.

[0024] like Figure 2As shown, a sling pin 67 is provided at the top of the frame 63, and the sling 5 of the electric hoist is hung on the sling pin 67. A hook pin 68 and a hook mounting hole 69 are provided at the bottom of the frame 63. A threaded post 70 is provided at the top of the hook 7, and the threaded post 70 passes through the hook mounting hole 69 from bottom to top. The hook 7 is positioned by the hook pin 68 and is fastened by the nut 71 that mates with the threaded post 70.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An anti-sway lifting device for an electric gantry crane in a ship's engine room, comprising a gantry system and an electric hoist, wherein the electric hoist is movably mounted on the gantry system, characterized in that: The electric hoist has a pendulum damping mechanism (6) at the connection between the hook (7) and the sling (5). The pendulum damping mechanism (6) includes a freely swinging pendulum (61) and a damping cup (62) fixed relative to the hook (7). The pendulum (61) counteracts the load swing by centrifugal force.

2. The anti-sway lifting device for a ship engine room electric trolley according to claim 1, characterized in that: The pendulum damping mechanism (6) also includes a frame (63), with a sling (5) connected to the top of the frame (63) and a hook (7) fixedly connected to the bottom of the frame; the damping cup (62) is fixedly installed relative to the frame (63) by mounting ears, and the pendulum (61) is swung and suspended in the top of the frame (63) by the movable joint (65) on its own pendulum rod (64), so that the pendulum (61) extends into the damping cup (62).

3. The anti-sway lifting device for a ship engine room electric trolley according to claim 2, characterized in that: The live joint (65) is a ball joint structure.

4. The anti-sway lifting device for a ship engine room electric trolley according to claim 2, characterized in that: The pendulum (61) is a metal sphere. The outer surface of the pendulum (61) is in clearance fit with the inner surface of the damping cup (62), generating frictional resistance when swinging.

5. The anti-sway lifting device for a ship engine room electric trolley according to claim 4, characterized in that: The inner wall of the damping cup (62) is fitted with a friction pad (66), and the pendulum (61) generates the frictional resistance by sliding and contacting the friction pad (66) and the damping cup (62) when it swings.

6. The anti-sway lifting device for a ship engine room electric trolley according to any one of claims 2 to 5, characterized in that: The top of the frame (63) is provided with a sling hook (67), and the sling (5) of the electric hoist is hung on the sling hook (67).

7. An anti-sway lifting device for a ship engine room electric crane according to any one of claims 2 to 5, characterized in that: The bottom of the frame (63) is provided with a hook pin (68) and a hook mounting hole (69). The top of the hook (7) is provided with a threaded post (70). The threaded post (70) passes through the hook mounting hole (69) from bottom to top. The hook (7) is positioned by the hook pin (68) and fastened by a nut (71) that mates with the threaded post (70).

8. The anti-sway lifting device for a ship engine room electric crane according to any one of claims 1 to 5, characterized in that: The gantry system includes a large trolley traveling beam (1), a traveling trolley (2), a small trolley traveling beam (3), and a traveling trolley (4) arranged sequentially from top to bottom. The large trolley traveling beam (1) is welded to the inner top of the ship's engine room, and the electric hoist is installed on the frame of the traveling trolley (4). The electric hoist moves between the bow and stern of the ship by being driven by the traveling trolley (2), and moves between the port and starboard sides by being driven by the traveling trolley (4), thereby realizing the movement and hoisting of objects in the engine room.

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