Steel wire rope pre-tensioning mechanism

Abstract

The application provides a steel wire rope pre-tightening mechanism, belonging to the technical field of a tower crane hoisting mechanism steel wire rope, comprising a to-be-wound steel wire rope roller, an elastic brake mechanism, a magnetic electric wheel set, an electromagnetic wheel set, a guide wheel set, a hoisting mechanism and a steel wire rope, the to-be-wound steel wire rope roller is connected with the elastic brake mechanism and the magnetic electric wheel set respectively, the electromagnetic wheel set is connected with the magnetic electric wheel set and the guide wheel set respectively, the guide wheel set is connected with the hoisting mechanism, one end of the steel wire rope is fixedly wound on the to-be-wound steel wire rope roller, the other end of the steel wire rope is wound on the magnetic electric wheel set, the electromagnetic wheel set, the guide wheel set and the hoisting mechanism in sequence, and the other end of the steel wire rope is fixedly wound on the hoisting mechanism. The steel wire rope pre-tightening mechanism provided by the application converts mechanical friction type damping into non-contact type damping, and provides pre-tightening force in a non-contact mode instead of the existing mechanical friction mode, so that there is no easy-to-damage part and no noise pollution; potential energy conversion is realized by using a generator, and energy loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of wire rope technology for tower crane hoisting mechanisms, and more particularly to a wire rope pretensioning mechanism. Background Technology

[0002] The hoisting mechanism is a crucial component of a crane. When the hoisting mechanism of a tower crane winds the wire rope onto the drum, a certain preload is required to ensure neat and tight winding. Otherwise, the wire rope is prone to tangling, causing interlayer crossings, flattening the rope, and reducing its service life. Wire rope preload significantly improves winding quality, reduces wear between wire ropes, prevents flashovers and skipping, and ultimately extends the wire rope's lifespan. Existing patent CN102040173A proposes a method using two sets of pulleys, a force measuring device, and a hydraulically driven brake caliper to clamp the friction disc. The disadvantages of this preload method include:

[0003] 1. Clamping the friction disc with calipers will cause severe overheating;

[0004] 2. The linear speed should not be too high, as it can easily generate noise pollution;

[0005] 3. The brake disc wears out quickly and is prone to failure. Summary of the Invention

[0006] The purpose of this invention is to provide a wire rope pretensioning mechanism to solve the technical problems mentioned in the background art. This invention provides pretensioning force in a non-contact manner instead of the existing mechanical friction method, eliminating vulnerable parts and noise pollution. It also utilizes potential energy through a generator, reducing energy consumption.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A wire rope pretensioning mechanism includes a wire rope drum to be wound, an elastic brake mechanism, a magneto-electric wheel assembly, an electromagnetic wheel assembly, a guide wheel assembly, a lifting mechanism, and a wire rope. The wire rope drum to be wound is connected to the elastic brake mechanism and the magneto-electric wheel assembly, respectively. The electromagnetic wheel assembly is connected to the magneto-electric wheel assembly and the guide wheel assembly, respectively. The guide wheel assembly is connected to the lifting mechanism. One end of the wire rope is fixedly wound around the wire rope drum to be wound, and the other end of the wire rope is sequentially wound around the magneto-electric wheel assembly, the electromagnetic wheel assembly, the guide wheel assembly, and the lifting mechanism, with the other end of the wire rope being fixedly wound around the lifting mechanism.

[0009] Furthermore, the wire rope drum to be wound is connected to the magneto wheel assembly via a wire rope. A rotating shaft is fixedly installed inside the wire rope drum to be wound. Both ends of the rotating shaft are respectively mounted on the unwinding bracket, and the rotating shaft is rotatable on the unwinding bracket. One end of the rotating shaft is fixedly connected to the elastic brake mechanism.

[0010] Furthermore, the elastic brake mechanism is fixedly mounted on the unwinding bracket, and the elastic brake mechanism is equipped with a spring and a motor.

[0011] Furthermore, the magneto-electric wheel assembly is mounted on the wheel assembly frame, and a generator is fixedly connected to one end of the magneto-electric wheel assembly. A speed reducer is installed between the magneto-electric wheel assembly and the generator.

[0012] Furthermore, the low-speed end of the reducer is connected to the magneto-electric wheel assembly, and the high-speed end of the reducer is connected to the generator.

[0013] Furthermore, the electromagnetic wheel assembly is mounted on the wheel assembly frame and connected to the magnetoelectric wheel assembly via a steel wire rope. One end of the electromagnetic wheel assembly is fixedly connected to an iron wheel, and an electromagnet is mounted above the iron wheel. The electromagnet is fixedly connected to the wheel assembly frame and connected to the generator via a coil.

[0014] Furthermore, the guide wheel assembly is mounted on the wheel assembly frame. The guide wheel assembly includes a first guide wheel assembly and a second guide wheel assembly. The first guide wheel assembly is connected to the electromagnetic wheel assembly and the second guide wheel assembly respectively via steel wire ropes. The second guide wheel assembly is connected to the lifting mechanism via steel wire ropes. The lifting mechanism is fixedly mounted on the winding support.

[0015] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0016] 1. The present invention is configured with a magneto-electric wheel assembly connected to a generator and an electromagnetic wheel assembly connected to an iron core coil. The current generated by the generator supplies power to the iron core coil. According to the electromagnetic principle, when the iron core coil is energized, the electromagnetic wheel assembly will be subjected to a reverse rotating magnetic force, achieving the effect of a damping wheel assembly, thereby realizing the pre-tensioning of the wire rope. By adjusting the spring on the elastic brake mechanism, the wire rope drum has a damping effect and has a stop function during operation.

[0017] 2. The wire rope pretensioning mechanism of this invention transforms mechanical friction damping into non-contact damping, providing pretensioning force in a non-contact manner instead of the existing mechanical friction method. It has no vulnerable parts and no noise pollution; it also realizes the conversion and use of potential energy through a generator, reducing energy consumption. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the wire rope pretensioning mechanism of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the magnetoelectric wheel assembly, the electromagnetic wheel assembly, and the guide wheel assembly of the present invention.

[0020] In the attached diagram, 1-unwinding support, 2-wire rope drum to be wound, 3-elastic brake mechanism, 4-magnetic wheel assembly, 5-reducer, 6-generator, 7-electromagnetic wheel assembly, 8-electromagnet, 9-guide wheel assembly, 10-lifting mechanism, 11-wire rope, 12-rotating shaft, 13-spring, 14-first guide wheel assembly, 15-second guide wheel assembly, 16-motor, 17-iron wheel, 18-wheel assembly frame, 19-coil, 20-winding support. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the present invention, and these aspects of the invention can be implemented even without these specific details.

[0022] like Figure 1-2 As shown, a wire rope pretensioning mechanism includes a wire rope drum 2 to be wound, an elastic brake mechanism 3, a magneto-electric wheel assembly 4, an electromagnetic wheel assembly 7, a guide wheel assembly 9, a lifting mechanism 10, and a wire rope 11. The wire rope drum 2 is connected to the elastic brake mechanism 3 and the magneto-electric wheel assembly 4, respectively. The electromagnetic wheel assembly 7 is connected to the magneto-electric wheel assembly 4 and the guide wheel assembly 9, respectively. The guide wheel assembly 9 is connected to the lifting mechanism 10. One end of the wire rope 11 is fixedly wound on the wire rope drum 2 to be wound, and the other end of the wire rope 11 is sequentially wound on the magneto-electric wheel assembly 4, the electromagnetic wheel assembly 7, the guide wheel assembly 9, and the lifting mechanism 10, with the other end of the wire rope 11 also fixedly wound on the lifting mechanism 10. The wire rope pretensioning mechanism of this invention transforms mechanical friction damping into non-contact damping, providing pretensioning force in a non-contact manner instead of the existing mechanical friction method. It has no vulnerable parts and no noise pollution; potential energy is converted and utilized through a generator 6, reducing energy consumption.

[0023] like Figure 1As shown, the wire rope drum 2 is connected to the magnetowheel assembly 4 via a wire rope 11. A rotating shaft 12 is fixedly installed inside the wire rope drum 2. Both ends of the rotating shaft 12 are respectively mounted on the unwinding bracket 1, and the rotating shaft 12 is rotatable on the unwinding bracket 1. During operation, the rotating shaft 12 rotates together with the wire rope drum 2. One end of the rotating shaft 12 is fixedly connected to an elastic brake mechanism 3, which rotates along with the rotating shaft 12. The elastic brake mechanism 3 is fixedly mounted on the unwinding bracket 1 and includes a spring 13 and a motor 16. When the rotating shaft 12 does not require braking force, the elastic brake mechanism 3 is opened by the thrust of the motor 16. The rotating shaft 12 passes through the center of the wire rope drum 2 to be wound and supports the wire rope drum 2 on the unwinding bracket 1. The unwinding bracket is used to support the wire rope drum 2 to be wound and the elastic brake mechanism 3. The rotating shaft 12 is fixedly connected to the elastic brake mechanism 3. By adjusting the spring 13 on the elastic brake mechanism 3, the wire rope drum 2 to be wound has a rolling damping effect. When the lifting mechanism 10 stops, the wire rope drum 2 to be wound has a stop function.

[0024] like Figure 2 As shown, the magneto-electric wheel assembly 4 is mounted on the wheel assembly frame 18. A generator 6 is fixedly connected to one end of the magneto-electric wheel assembly 4. The generator 6 is preferably a synchronous generator with an operating speed preferably above 1300 rpm. A reducer 5 is installed between the magneto-electric wheel assembly 4 and the generator 6. The reducer 5 is preferably a gear reducer with a speed ratio of 10 or higher. The low-speed end of the reducer 5 is connected to the magneto-electric wheel assembly 4, and the high-speed end of the reducer 5 is connected to the generator 6. An electromagnetic wheel assembly 7 is mounted on the wheel assembly frame 18 and connected to the magneto-electric wheel assembly 4 via a steel wire rope 11. An iron wheel 17 is fixedly connected to one end of the electromagnetic wheel assembly 7. An electromagnet 8 is mounted above the iron wheel 17 and is fixedly connected to the wheel assembly frame 18. The electromagnet 8 is connected to the generator 6 via a coil 19, and the output winding of the generator 6 is connected to the electromagnet 8 via an AC / DC circuit. Guide wheel assembly 9 is mounted on wheel assembly frame 18. Guide wheel assembly 9 includes first guide wheel assembly 14 and second guide wheel assembly 15. First guide wheel assembly 14 is connected to electromagnetic wheel assembly 7 and second guide wheel assembly 15 respectively via steel wire rope 11.

[0025] The second guide wheel assembly 15 is connected to the lifting mechanism 10 via a wire rope 11. The lifting mechanism 10 is fixedly mounted on the winding support 20. The exit end of the wire rope 11 is first wound around a pair of parallel-installed magnetic...

[0026] On the electric wheel assembly 4 and the electromagnetic wheel assembly 7, the output terminal of the generator 6 generates alternating current. This current powers the electromagnet 8 through an AC-to-DC circuit. According to electromagnetic principles, when the electromagnet 8 is energized, the electromagnetic wheel assembly 7 experiences a reverse-rotating magnetic coupling, achieving the effect of a damping wheel assembly, thereby providing winding for the wire rope.

[0027] Around the tension, the iron wheel 17 at one end of the electromagnetic wheel assembly 7 can be in the form of a turbine to provide tangential suction with the electromagnet 8 and generate axial airflow to dissipate heat from the electromagnet 8. The guide wheel assembly 9 is set according to the specific site layout to guide the wire rope 11 towards the lifting mechanism 10.

[0028] Working principle

[0029] The exit end of the wire rope 11 is first wound around the parallel-installed magneto-electric wheel set and electromagnetic wheel set. The number of turns depends on the preload requirement, generally 2-3 turns. One end 5 of the wire rope 11 is then fastened to the lifting mechanism 10 through the guide wheel set 9, completing the wire rope 11 threading process. Then, the lifting mechanism 10 is energized.

[0030] The engine 6 pulls the wire rope 11 to perform a winding operation. Due to the winding resistance, the wire rope 11 drives the magneto-electric wheel assembly 4 and the electromagnetic wheel assembly 7 to rotate. According to the principle of magneto-electricity, the output terminal of the engine 6 generates alternating current. This current supplies power to the electromagnet 8 through an AC-to-DC circuit. According to the principle of electromagnetism, when the electromagnet 8 is energized...

[0031] The electromagnetic wheel assembly 7 is subjected to a counter-rotating magnetic coupling, achieving the effect of a damping wheel assembly and thus providing winding tension for the steel wire rope. The iron wheel of the electromagnetic wheel assembly 7 can be made in the form of a turbine to provide tangential force with the electromagnet.

[0032] The suction force and the axial airflow generated provide heat dissipation for the electromagnet 8; when the winding is completed, the hoist 10 is de-energized and stops working, and the wire rope drum 2 to be wound stops immediately due to the action of the elastic brake mechanism 3.

[0033] The above description is only a preferred embodiment of the present invention. 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 invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A wire rope pretensioning mechanism, characterized in that: The system includes a wire rope drum (2) to be wound, an elastic brake mechanism (3), a magneto-electric wheel group (4), an electromagnetic wheel group (7), a guide wheel group (9), a lifting mechanism (10), and a wire rope (11). The wire rope drum (2) to be wound is connected to the elastic brake mechanism (3) and the magneto-electric wheel group (4) respectively. The electromagnetic wheel group (7) is connected to the magneto-electric wheel group (4) and the guide wheel group (9) respectively. The guide wheel group (9) is connected to the lifting mechanism (10). One end of the wire rope (11) is fixedly wound on the wire rope drum (2) to be wound. The other end of the wire rope (11) is wound sequentially on the magneto-electric wheel group (4), the electromagnetic wheel group (7), the guide wheel group (9), and the lifting mechanism (10). The other end of the wire rope (11) is fixedly wound on the lifting mechanism (10). The magneto-electric wheel set (4) is mounted on the wheel set frame (18). One end of the magneto-electric wheel set (4) is fixedly connected to a generator (6). A speed reducer (5) is installed between the magneto-electric wheel set (4) and the generator (6). The electromagnetic wheel assembly (7) is set on the wheel assembly frame (18). The electromagnetic wheel assembly (7) is connected to the magnetoelectric wheel assembly (4) through the wire rope (11). One end of the electromagnetic wheel assembly (7) is fixedly connected to an iron wheel (17). An electromagnet (8) is set above the iron wheel (17). The electromagnet (8) is fixedly connected to the wheel assembly frame (18). The electromagnet (8) is connected to the generator (6) through a coil (19).

2. The wire rope pretensioning mechanism according to claim 1, characterized in that: The wire rope drum (2) to be wound is connected to the magneto wheel group (4) via the wire rope (11). The inside of the wire rope drum (2) to be wound is fixedly provided with a rotating shaft (12). The two ends of the rotating shaft (12) are respectively set on the unwinding bracket (1), and the rotating shaft (12) is set to be rotatable on the unwinding bracket (1). One end of the rotating shaft (12) is fixedly connected to the elastic brake mechanism (3).

3. The wire rope pretensioning mechanism according to claim 2, characterized in that: The elastic brake mechanism (3) is fixedly mounted on the unwinding bracket (1), and the elastic brake mechanism (3) is equipped with a spring (13) and a motor (16).

4. The wire rope pretensioning mechanism according to claim 1, characterized in that: The low-speed end of the reducer (5) is connected to the magneto-electrode assembly (4), and the high-speed end of the reducer (5) is connected to the generator (6).

5. The wire rope pretensioning mechanism according to claim 1, characterized in that: The guide wheel assembly (9) is set on the wheel assembly frame (18). The guide wheel assembly (9) includes a first guide wheel assembly (14) and a second guide wheel assembly (15). The first guide wheel assembly (14) is connected to the electromagnetic wheel assembly (7) and the second guide wheel assembly (15) respectively through a wire rope (11). The second guide wheel assembly (15) is connected to the lifting mechanism (10) through a wire rope (11). The lifting mechanism (10) is fixedly set on the winding support (20).

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