RU2271982C1 - Tensioning device - Google Patents

Abstract

FIELD: mechanical engineering; materials handling facilities.

SUBSTANCE: invention can be used in wire rope production. Proposed tensioning device of rope-twisting machine has reel and brake. Brake is made in form of disk with permanent ring magnets and iron powder rigidly coupled with inner surface of reel, and pressure disk rigidly coupled with fixed axle on which nut with thread is fitted. Cores of magnets are mechanically coupled with levers of centrifugal governor hinge-secured on shaft of gear wheel of planetary mechanism. Sun gear shaft is rigidly coupled with disk and ring magnets, and carrier is rigidly coupled with fixed axle.

EFFECT: provision of constant tension of wire in tensioning device of rope-twisting machine.

1 dwg

Description

The invention relates to hoisting and transport machinery and can be used in cable production.

Developed to date, the design of the tensioning devices of rope machines in some cases do not provide the specified tension of its elements, while in others they have great complexity and low reliability during operation. Therefore, they did not find wide application in cable production [1, 2, 3, 4].

Closest to the claimed technical solution is the shoe brake of charging coils [5]. It contains a brake disc located on the charging coil. The brake pad is pressed against the brake disc due to the force of clamping the spring acting through the lever.

As the material of the brake pads, rubber or leather is usually used.

This tensioning device does not provide uniform technological tension of the rope elements, since the coefficient of sliding friction changes during operation when the friction pairs wear, increase in temperature or the ingress of contaminants.

The purpose of the invention is the provision of a constant tension of the wire in the tensioning device of the rope machine.

This goal is achieved by the fact that the tension device containing the coil and brake, made in the form of a disk with permanent ring magnets and iron powder, is rigidly connected to the inner surface of the coil and the pressure disk connected to the fixed axis through a threaded nut connection that contains a stopper that prevents spontaneous unscrewing, and the cores of the magnets are kinematically connected with the levers of a centrifugal regulator, pivotally mounted on the gear shaft of the planetary gear. The shaft of the solar wheel is rigidly connected to the disk and ring magnets, and the carrier is rigidly connected to the fixed axis. Satellites create a kinematic chain between the sun wheel and the gear of the planetary gear.

Significant differences of the alleged invention is:

- the use of a centrifugal regulator kinematically connected with the cores of ring magnets;

- the use of a scaffold with permanent ring magnets, rigidly connected with the inner surface of the coil;

- the clamping disk allows you to adjust the gaps in the powder clutch.

The device comprises a coil 1 and a brake. The brake is made in the form of a disk 2 with permanent ring magnets 3, iron powder 4 and a clamping disk 5. The disk 2 with permanent ring magnets 3 is rigidly connected to the inner surface of the coil 1, and the clamping disk 5 is connected to the fixed axis 6 through a threaded connection of the nut 7, which contains a stopper against spontaneous unscrewing. The cores of the magnets 8 are kinematically connected with the levers 9 of the centrifugal regulator 10, pivotally mounted on the shaft of the gear wheel 11 of the planetary mechanism. The shaft of the sun wheel 12 is rigidly connected to the disk 2, and the carrier 13 is rigidly connected to the fixed axis 6. The satellites 14 create a kinematic chain between the sun wheel 12 and the gear wheel 11 of the planetary mechanism.

With a decrease in the radius of the coil winding, its rotation frequency increases. This increases the speed of the centrifugal controller 10, which by means of levers 9 moves the core of the magnets 8 in the direction of the pressure disk 5. At the same time, the magnetic field in the contact zone is amplified, and therefore the interaction between the particles of the metal powder is increased. This leads to an increase in braking torque, and the wire tension will not change and will be equal to the specified value of the coil 1.

The use of iron powder located in the magnetic field of permanent magnets allows us to obtain stable values of the friction forces and to eliminate wear of rubbing surfaces.

Literature

1. Bukstein M.A. Production and use of steel ropes. - M.: Metallurgy, 1973. - 359 p.

2. Sergeev S.T. Steel ropes. K., Technique, 1974, p. 279

3. Koganovsky I.K. To the question of the method of the equation of tension in strands (wires) when twisting wire ropes (strands). In the book: Hardware Production, Metallurgizdat, 1956.

4. Nesterov P.P., Abakumov V.I. The influence of the rotational speed of the knitting part of the machine on the accuracy of the auto-regulation of the strand tension during rope manufacturing In: Lifting-and-transport equipment, vol. No. 7, 1976, p. 65.

5. Kozyuberda N.I. On the tension of wires and strands during the lay of steel ropes. In: Proceedings of the Institute of Mining. Vol. No. 9, 1960.

Claims (1)

Tensioning device of a rope machine, containing a coil and brake, characterized in that, in order to ensure constant tension of the wire, the brake is made in the form of a disk with permanent ring magnets and iron powder, rigidly connected with the inner surface of the coil and the pressure disk, rigidly connected with the fixed axis on which a threaded nut is mounted, and the cores of the magnets are kinematically connected with the levers of a centrifugal regulator pivotally mounted on the gear shaft of the planetary gear, m shaft sun gear is rigidly connected with the disc and the ring magnets and the guide is rigidly connected with the stationary axle.