RU198420U1 - MAGNETIC BRAKE ROLLER FOR ROLLER GRAVITY CONVEYORS - Google Patents

Abstract

The utility model relates to industrial transport and can be used to regulate the speed of transportation of piece goods in roller gravity conveyors. The technical result of the proposed utility model is to improve the reliability of the roller by simplifying the design of the centrifugal device and eddy current brake. To achieve the technical result of increasing the reliability of the roller, it is proposed to simplify the design of the centrifugal device and the eddy current brake by making the conductive body of the eddy current brake in the form of levers, copper, gold, aluminum or brass, which, under the influence of centrifugal force arising from the action of an external load on the roller, diverge from center in the radial direction and enter the magnetic field of permanent magnets. 4 p.p. f-ly, 2 dwg

Description

Technical field

The utility model relates to industrial transport and can be used to control the speed of transportation of piece goods in roller gravity conveyors.

State of the art

The principle of operation of brake magnetic rollers is based on the laws of electromagnetic induction and involves the braking of a conductor moving in a magnetic field due to the interaction of eddy currents or Foucault currents that occur in the volume of the conductor with an external magnetic field.

Known brake magnetic roller [1], consisting of a shell, on the axis of which are a planetary multiplier, a centrifugal device containing centrifugal masses (balls) and discs, on one of which is a magnetic circuit and permanent magnets of an eddy current brake, and on the other - copper or brass a disk (conductive body), rigidly fixed to the side of the roller with the possibility of transmitting the moment to it. When the shell rotates under the action of the transported load, centrifugal masses act on one of the disks of the centrifugal device, shifting it towards the conductive body, which enters the magnetic field of the permanent magnets, thereby creating a braking moment and braking the shell.

The disadvantages of the described design are the complexity of the design of the centrifugal device and the eddy current brake, the significant response time (opening) of the brake roller, due to the acceleration time of the centrifugal masses (balls), as well as the rapid wear of the working surfaces of the disks on which centrifugal masses (balls) are run.

Also known is a brake magnetic roller [2] (prototype), consisting of a shell, on the axis of which there are a planetary multiplier, a centrifugal device containing centrifugal masses (balls) and discs, on one of which are permanent magnets and a magnetic circuit of the eddy current brake, and on the other - a copper or brass disk (conductive body), rigidly fixed to the side of the roller with the possibility of transmitting the moment to it. When the shell rotates under the action of the transported load, centrifugal masses act on one of the disks of the centrifugal device, shifting it toward the conductive body, which approaches the disk of permanent magnets, thereby creating a braking moment and braking the shell.

The disadvantages of the described design are the complexity of the design of the centrifugal device and the eddy current brake, the significant response time (opening) of the brake roller, due to the acceleration time of the centrifugal masses (balls), as well as the rapid wear of the working surfaces of the disks on which centrifugal masses (balls) are run.

Utility Model Disclosure

The objective of the utility model is to eliminate the disadvantages of the analogue and prototype. The technical result of the proposed utility model is to increase the reliability of the roller by simplifying the design of the centrifugal device and eddy current brake.

The problem is solved in that the magnetic brake roller for gravity roller conveyors contains a shell mounted on a fixed axis with a planetary multiplier inside and an eddy current brake with a conductive body, while the conductive eddy current brake body is made in the form of levers, which under the action of centrifugal force arising from the external load on the roller, diverge from the center in the radial direction and enter the magnetic field of permanent magnets.

In preferred embodiments of the utility model, the levers are made of brass, copper, gold or aluminum.

List of figures

In FIG. 1 shows a general view of a magnetic brake roller for roller gravity conveyors.

In FIG. 2 shows a cross section of a magnetic brake roller for roller gravity conveyors: a - the initial position of the levers; b - extended position of the levers.

Utility Model Implementation

Magnetic brake roller for gravity roller conveyors (Fig. 1) consists of a shell 4, on a fixed axis 5 of which a planetary multiplier 1 and a centrifugal eddy current brake 2 are installed. The stationary axis 5 of the shell with a bearing flange 3 is one of the two bearings of the roller. The second bearing of the roller is a bearing flange 3. A disk with permanent magnets 7 is mounted (for example, pressed) inside the shell 4. On the output rotating gear of the multiplier 1, which can rotate relative to the fixed axis 5, there is a hub 8 of a centrifugal eddy current brake 2, in the grooves 9 of which , are the fingers 10 of the conductive body, made in the form of levers 6, for example, copper, aluminum, gold or brass, and connected by springs 11 and axles 12 with the hub 8.

Magnetic brake roller for roller gravity conveyors refers to high-speed brakes (speed limiters) of a centrifugal type, the purpose of which is to prevent an increase in the speed of piece cargo, for example, pallets, beyond a predetermined limit. These brakes cannot stop the pallet.

Magnetic brake roller for roller gravity conveyors works as follows.

When pallets hit the roller, the shell 4 of the latter accelerates. The torque from the shell 4 through the multiplier 1 is transmitted to the hub 8 and then through the fingers 10 to the levers 6 (conductive body), which, under the action of the centrifugal force arising from the external load, diverge from the center of the roller in the radial direction relative to the axes 12 and occupy the working position (Fig. 2b).

The process of braking the roller begins when the levers 6 (conductive body) enter the magnetic field created by the permanent magnets 7. This causes a decrease in the speed of rotation of the shell 4 of the roller, and, consequently, the speed of the pallet. The brake system of the roller enters the constant braking mode, and the pallet enters the motion mode with a constant speed not exceeding the maximum speed.

At the exit of the pallets from the shell of the roller 4, the levers 6 (conductive body), under the action of the springs 11, return to their original (initial) position (Fig. 2a).

The proposed magnetic brake roller for roller gravity conveyors allows to achieve the claimed technical result, namely, to increase the reliability of the roller by simplifying the design of the centrifugal device and eddy current brake by executing the conductive body of the eddy current brake in the form of levers, which under the action of centrifugal force arising from the external load on the roller , diverge from the center in the radial direction and enter the magnetic field of permanent magnets.

Sources of information

1. US patent 8887898. Conveyor roller with centrifugal force-operated magnetic brake / Interroll Holding AG. Publ. 11/18/2014.

2. German patent 202011106752. Bremsfoerderrolle / Bito-Lagertechnik Bittmann Gmbh. Publ. 11/30/2011.

Claims (5)

1. Magnetic brake roller for gravity roller conveyors, comprising a shell mounted on a fixed axis with a planetary multiplier and an eddy current brake with a conductive body, characterized in that the conductive eddy current brake body is made in the form of levers, which under the action of centrifugal force arising from the action external load on the roller, diverge from the center in the radial direction and enter the magnetic field of permanent magnets. 2. A roller according to claim 1, characterized in that the levers are made of brass. 3. The roller according to claim 1, characterized in that the levers are made of copper. 4. The roller according to claim 1, characterized in that the levers are made of gold. 5. The roller according to claim 1, characterized in that the levers are made of aluminum.

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