Angular momentum correction system of crane

Abstract

The invention relates to an angular momentum deviation correction system of a crane. The angular momentum deviation correction system comprises a deviation detection device and a deviation correction device, the deviation detection device is mounted below a walking wheel at the bottom of a supporting leg of the crane, and the deviation correction device is mounted in the middle of the supporting leg of the crane; the supporting leg supports a main beam of the crane through a pivotal bearing; the deviation detection device comprises a spring, a telescopic rod, a pulley and a supporting structure. The deviation correcting device comprises a first rotating shaft, a shell, a flywheel and a second rotating shaft. According to the angular momentum deviation rectifying system of the crane, through rotation of the first rotating shaft and the second rotating shaft, the crane support is driven to rotate according to the angular momentum conservation principle, and then deviation rectifying is achieved; the deviation of the current crane bracket is detected in real time through a movement amount sensor; the design of the pivotal bearing is adopted to ensure that the main beam is kept still in the deviation rectifying process, so that goods cannot be influenced even if the supporting legs rotate, and the operation stability is ensured.

Description

Technical Field

[0001] This invention relates to an angular momentum correction system for a crane, belonging to the field of loading machinery technology. Background Technology

[0002] Bridge and gantry cranes are widely used in industrial production, representing the most extensive and numerous type of lifting machinery. These cranes are characterized by their large span and high efficiency. However, due to their structural features, such as large span, low horizontal stiffness, and complex transmission mechanisms, bridge and gantry cranes often experience varying degrees of misalignment or rail wear during operation. This phenomenon not only affects the normal operation of the crane but can also cause serious damage to the equipment itself, increasing operating and maintenance costs and reducing production safety and efficiency. Especially after prolonged operation, the service life of the traveling wheels and rails is significantly reduced. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned technology and provide a system that can correct the deviation of the traveling wheels of a crane by utilizing the conservation of angular momentum when the traveling wheels of the crane deviate from the track.

[0004] To solve the above-mentioned technical problems, the present invention proposes the following technical solution: an angular momentum correction system for a crane, comprising: an offset detection device and a correction device; the offset detection device is installed below the traveling wheel at the bottom of the crane's outriggers, and the correction device is installed in the middle of the crane's outriggers; The offset detection device includes: a spring, a telescopic rod, a pulley, and a support structure; one end of the support structure is connected to the outriggers of the crane, and the other end extends to below the traveling wheels at the bottom of the outriggers of the crane; one end of the telescopic rod is connected to the support structure, and the other end is fitted with the pulley; the pulley contacts a track that mates with the traveling wheels at the bottom of the outriggers of the crane; the spring is sleeved on the telescopic rod and has a tendency to cause the movable end of the telescopic rod to move toward the track; the telescopic rod is connected to a movement sensor; the movement sensor outputs to a control device; The correction device includes: a first rotating shaft, a housing, a flywheel, and a second rotating shaft; the first rotating shaft is connected to the outriggers of the crane and the housing, and the first rotating shaft can drive the housing to rotate; the flywheel is placed inside the housing and supported by the second rotating shaft; the second rotating shaft can drive the flywheel to rotate; the control device controls the rotation angle and speed of the housing and the flywheel.

[0005] A further improvement to the above solution is that the movement sensor is a pressure sensor placed between the spring and the fixed end of the telescopic rod.

[0006] A further improvement to the above solution is that the movement sensor is a distance sensor placed between the movable end and the fixed end of the telescopic rod.

[0007] A further improvement to the above scheme is that the offset detection device is symmetrically arranged on both sides of the track.

[0008] The crane angular momentum correction system provided by this invention rotates the crane support by rotating the first and second shafts, based on the principle of conservation of angular momentum, thereby achieving correction. A motion sensor detects the current offset of the crane support in real time, effectively preventing the crane from deviating from its track and reducing the risk of overturning or other safety accidents caused by deviation. The use of a slewing bearing design ensures that the main beam remains stationary during the correction process, so even if the outriggers rotate, the cargo will not be affected, thus guaranteeing operational stability. This crane angular momentum correction system provided by this invention can be applied not only to gantry cranes but also to other heavy machinery, exhibiting excellent functional expandability. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0010] Figure 2 This is a schematic diagram of the offset detection device in a preferred embodiment of the present invention.

[0011] Figure 3 This is a schematic diagram of the correction device in a preferred embodiment of the present invention.

[0012] The labels in the diagram are as follows: 10-Main beam, 20-Slewing bearing, 30-Crane outrigger, 40-Correction device, 41-First shaft, 42-Outer shell, 43-Flywheel, 44-Second shaft, 50-Crane traveling wheel, 60-Offset detection device, 61-Spring, 62-Telescopic rod, 63-Pulley, 64-Support, 65-Pressure sensor, 70-Railway. Detailed Implementation

[0013] Example: The angular momentum correction system of the crane in this example, such as Figure 1 As shown, there is a correction device 40 and an offset detection device 60.

[0014] The crane comprises: a main beam 10, a slewing bearing 20, crane outriggers 30, and crane wheels 50. The main beam 10 is the key component of the crane, used for loading and moving goods during operations. It is mounted above the slewing bearing 20, ensuring smooth movement and rotation of goods during operation. The slewing bearing 20, located below the main beam 10, not only supports the main beam 10 but also allows it to rotate freely horizontally relative to the crane outriggers 30. This design allows the main beam 10 to operate at different angles while maintaining its vertical stability. The crane outriggers 30 form the foundation of the entire crane structure; they are in direct contact with the ground and connected to the main beam 10 via the slewing bearings 20.

[0015] A correction device 40 is installed at the center of the crane outrigger 30; this is the core component for automatic correction. The correction device 40 utilizes the principle of conservation of angular momentum in physics to correct any detected deviation. A deviation detection device 60 is located below the crane outrigger 30 and in contact with the track 70. The deviation detection device 60 monitors the positional changes of the crane's traveling wheels 50 in real time. When the deviation detection device 60 detects a deviation in the crane's traveling wheels 50, the control structure immediately controls the correction device 40 to adjust accordingly.

[0016] like Figure 2 As shown, the offset detection device 60 includes a spring 61, a telescopic rod 62, a pulley 63, and a support 64. The support 64 is connected to the crane outrigger 30, providing an installation position for the offset detection device 60. The telescopic rod 62 is arranged at the bottom end of the support 64, and the spring 61 is sleeved on the telescopic rod 62. The two ends of the spring 61 are respectively connected to the fixed end and the movable end of the telescopic rod 62. The pulley 63 is installed at the movable end of the telescopic rod 62 and is flush against the track 70. A pressure sensor 65 is arranged between the spring 61 and the fixed end of the telescopic rod 62.

[0017] The offset detection device 60 is the eye of the entire correction system. As the crane moves on the track 70, the pulley 63 always remains in contact with the track. A spring 61 provides a spring force to the telescopic rod 62 towards the track 70, allowing the pulley 63 to fit tightly against the surface of the track 70. This design ensures that even if the track has slight unevenness or curvature, the pulley 63 can adjust its position to follow the changes in track shape. When the crane's traveling wheels 50 deviate from the centerline, the distance between the two sides of the track 70 changes. A pressure sensor 65 mounted on the telescopic rod 62 accurately measures this pressure change and transmits the data to the control structure. Based on this information, the control structure determines whether to initiate a correction operation and, if so, the direction and extent of the correction.

[0018] In this embodiment, the offset detection devices are symmetrically arranged on both sides of the track. Depending on the actual needs, the left and right sides can be detected independently, or one side can be detected and the other side can be verified, etc.

[0019] Depending on the actual needs, the pressure sensor 65 can be replaced with other motion detection sensors, such as displacement sensors, distance sensors, etc.

[0020] like Figure 3 As shown, the correction device 40 is a key component designed based on the principle of conservation of angular momentum, used to automatically correct the crane's deviation during operation. The correction device 40 includes: a first rotating shaft 41, a housing 42, a flywheel 43, and a second rotating shaft 44. The first rotating shaft 41 is located outside the housing 42 and is directly connected to the crane's outriggers 30. This connection allows the first rotating shaft 41 to transfer the rotational angular momentum of the flywheel to the entire correction device 40. The housing 42 is the main frame of the entire correction device 40, enclosing and protecting the internal flywheel 43 and the second rotating shaft 44. The flywheel 43 is a component with a large moment of inertia. The second rotating shaft 44 is located in the middle of the interior of the housing 42 and is coaxially connected to the flywheel 43. The first rotating shaft 41 and the second rotating shaft 44 are driven by necessary power.

[0021] The principle behind this embodiment is the law of conservation of angular momentum, which states that in a system without external torque, the total angular momentum of the system remains constant. This can be expressed mathematically as follows: ; This means that the angular momentum L does not change over time. Angular momentum L is a vector used to describe the rotational motion of an object. For a point mass m rotating with velocity v about a fixed point O, its angular momentum relative to point O can be expressed as , where r is the position vector from O to the point mass, and p is the linear momentum of the point mass. In a more general case, especially for rigid bodies or continuously distributed masses, angular momentum can be defined by the moment of inertia I and the angular velocity ω, i.e. Moment of inertia (I) is a measure of an object's ability to resist changes in its rotational state. Its value depends on the object's mass distribution and its position relative to the axis of rotation.

[0022] In this embodiment, the flywheel 43 has a large moment of inertia I and can rotate on the second shaft 44, storing a large amount of angular momentum during rotation. When the crane traveling wheel 50 deviates due to external factors, the deviation detection device 60 detects this deviation and sends it to the control structure. The control structure changes the angular momentum of the flywheel 43 by adjusting its rotational speed. Since the flywheel 43 and the second shaft 44 form a closed system without external torque, the change in the angular momentum of the flywheel 43 will cause the angular momentum of the entire system, as well as that of the flywheel 43 and the crane outrigger 30, to rotate in the opposite direction to satisfy the condition of conservation of angular momentum. The design of the slewing bearing can prevent the main beam from tilting during the correction process, thus avoiding any impact on the goods being lifted.

[0023] The crane using this embodiment operates as follows: Step 1: System initialization, power on, crane ready, and goods to be moved suspended on main beam 10.

[0024] Step 2: The crane begins to move along track 70.

[0025] Step 3: The offset detection device 60 continuously monitors the status of the traveling wheels 50. If an offset is detected, the correction process begins. If no offset is detected, the process continues.

[0026] Step 4, Deviation Occurs: Activate the correction device 40. The control structure adjusts the rotational speed of the flywheel 43. By rotating the second shaft 44, the first shaft 41 is rotated according to the direction of the deviation, thus achieving deviation correction.

[0027] Step 5, No deviation occurred: Continue as planned.

[0028] Step Six: Gantry Crane Unloads Goods and Resets: After completing the handling task, the gantry crane returns to its initial position.

[0029] Step 7: Once the workflow is complete, turn off the power and the system will stop working. In summary, the crane's angular momentum correction system in this embodiment combines advanced sensing technology with the principle of conservation of angular momentum in physics to achieve precise control over the crane's operating state, providing reliable protection for complex lifting operations.

[0030] This invention is not limited to the products described above. All technical solutions derived using equivalent substitutions fall within the scope of protection claimed by this invention.

Claims

1. An angular momentum correction system for a crane, characterized by, The application relates to a deviation detection device and a deviation rectifying device. The deviation detection device is arranged below the walking wheel at the bottom of the supporting leg of the crane, and the deviation rectifying device is arranged at the middle of the supporting leg of the crane. The supporting leg supports the main beam of the crane through a rotary bearing. The deviation detection device comprises a spring, an extension rod, a pulley and a supporting structure. One end of the supporting structure is connected to the supporting leg of the crane, and the other end extends below the walking wheel at the bottom of the supporting leg of the crane.

2. The angular momentum correction system for a crane of claim 1, wherein: One end of the extension rod is connected to the supporting structure, and the other end is arranged with the pulley.

3. The angular momentum correction system for a crane of claim 1, wherein: The pulley contacts the track matched with the walking wheel at the bottom of the supporting leg of the crane.

4. The angular momentum correction system for a crane of claim 1, wherein: The spring is sleeved on the extension rod and has a tendency to move the movable end of the extension rod towards the track. The extension rod is connected with a moving amount sensor. The moving amount sensor is output to a control device. The deviation rectifying device comprises a first rotating shaft, a shell, a flywheel and a second rotating shaft. The first rotating shaft is connected to the supporting leg of the crane and the shell respectively. The first rotating shaft can drive the shell to rotate. The flywheel is arranged in the shell and is supported by the second rotating shaft. The second rotating shaft can drive the flywheel to rotate. The control device controls the rotating angle and speed of the shell and the flywheel. The moving amount sensor is a pressure sensor arranged between the spring and the fixed end of the extension rod. The moving amount sensor is a distance sensor arranged between the movable end and the fixed end of the extension rod. The deviation detection devices are symmetrically arranged on both sides of the track.

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