Disassembling the bearing from the shaft and the device for its implementation

 

(57) Abstract:

Usage: Assembly work. The inventive device includes a source of electrical energy, a Converter of electrical energy into thermal energy. The Converter is implemented in the form of pairs of contacts. The source is designed as a group of separate sources connected with the contacts and made in the form of-winding step-down transformer. 2 S. and 2 C. p. F.-ly, 2 Il.

The invention relates to mechanical work, in particular to methods of Dismounting of rolling bearings with the shaft journal, and can be used in the manufacture of repair work.

Known disassembling the bearing, whereby heating of the movable bearing to the appropriate temperature is induction [2]

The disadvantage of this method is that this method due to stray fields is heated and the shaft that requires high power source and increase overheating of the bearing race.

Closest to the present invention is a method of removal of the bearings from the shaft [1] which consists in heating the inner ring of the bearing by rotating one of the rings with remote lubrication.overhasty balls and the raceways of the rings. Additionally, the simultaneous heating of both rings requires a higher installed capacity device Dismounting of bearings.

Closest to the present invention is a device consisting of a heater of the bearing and puller.

The disadvantage of this device is the increased power consumption due to the fact that part of the energy is used for compensation of stray fields. In addition, this unit has high safety requirements due to the strong electromagnetic fields of high frequency.

The purpose of the invention to reduce power consumption and improve safety.

The objective is achieved by the fact that the heated first outer ring, and inner, and heating is carried out by the electric-contact method.

In the device to implement the method that contains the electric power source and a Converter of electrical energy into heat; the Converter is implemented in the form of pairs of contacts to communicate with the sleeves of the bearings connected to the poles of a source of electrical energy. Another distinctive feature of the device is performing an energy source in the form of a group of individual sources with polyson step-down transformer, the primary winding of which is connected to the network, and the secondary winding are connected with contacts.

In Fig.1 shows a diagram of the device for disassembly of the bearing from the shaft; Fig.2 is an electric wiring diagram of the source with the bearing bracket.

Device for removal of the bearings from the shaft includes a source 1 of electrical energy, which may be in the form of the transformer (Fig.2), a pair of contacts inner race 2 and outer casing 3 is connected to the power wires 4, and the stripper 5. The transformer 1 has a primary winding 6 and n of the secondary winding 7 connected wires of the pairs of contacts of the clamps 2 and 3. Contacts inner race 2 is separated from the shaft by insulating spacers 8.

The method is as follows.

The shaft with the bearing mounted on the stripper, clamps, bearings connected pair of contact clips 2 and 3, and the outer ferrule is connected pairs of contacts, and only the first internal contacts. The energy source is connected to the network and give a time delay of about 30 for heating the upper clip, then disconnect the pins from the top of the cage 3, is connected to the second contacts to the inner holder 2 and, after a period of time, NEOU and inner race of the bearings during removal. This, in turn, by half will reduce the installed power source, and accordingly the current consumed from the network.

The operation of the heating of the bearing is equal to the total heating energy of each of the rings. Since the power source is determined by dividing the work on time, with separate heating clamps the maximum power will be determined by the work to heat a large ring, divided by the heating time. Therefore, if the bearing consists of two rings, with separate heating rings of power will drop by almost two times.

The proposed device increases the efficiency of removal of the bearings from the shaft by eliminating the deformation of the shaft journal and the bearing. In addition, the exclusion of induction heating reduces the risk of installation for health personnel.

1. Disassembling the bearing from the shaft, including heat, rings, characterized in that, to reduce power consumption, is first heated by the outer ring, then heat the inner ring, and heating is carried out by the electric-contact method.

2. The device for disassembly of the bearing from the shaft containing a source of electrical energy, changes the user made in the form of pairs of contacts to communicate with the sleeves of the bearings, connected to the poles of a source of electrical energy.

3. The device according to p. 2, characterized in that, to increase the uniformity of heating of the bearing and speed of dismantling, the energy source is designed as a group of separate sources poles associated with a separate pair of contacts each.

4. The device according to p. 3, characterized in that the source made in the form of-winding step-down transformer, the primary winding of which is connected to the network, and the secondary winding are connected with contacts.

 

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