SU1372402A1 - Disconnector - Google Patents

Abstract

The invention relates to a high-voltage electrical apparatus and can be used in designs of rotary-type disconnectors at voltages up to 110 kV. The purpose of the invention is to improve the weight and dimensions and simplify the design of the disconnector. A rotary type disconnecting device is proposed in which the lower part 4 of the rotary insulator 5 is provided with an internal cavity 6 in which a bearing 8 is located mounted on an axis 3 fixed to the frame 1. In addition, the internal cavity can be made in the form of a sliding bearing. 1 ep 3 il. five

Description

Fig 2

The invention relates to electrical engineering, specifically to high-voltage isolators.

The purpose of the invention is to reduce mass and size and simplify the design.

Figure 1 shows the disconnector, General view; Figure 2 shows the lower part of the rotary insulator with a bearing; Fig. 3 shows the lower part of the rotary insulator with a sliding bearing;

The disconnector consists of frame 1, on which bracket 2 is fixed, with an axis 3 directly attached to frame 1 (for example, electric welding) without an intermediate plate or another known method (for example, fixed in a frame). In the lower part 4 of the rotary insulator 5 there is a cavity 6 in which a sleeve (cup) 7 is mounted. In the sleeve 7 bearings 8 are pressed in, on which the rotary insulator 5 rotates. For a connection with the drive (or another column tori) to the sleeve 7 is attached to the lever 9. In one embodiment (.fig.z) disconnector wall 10 of the inner cavity 6 is made in the form of a sliding bearing for which they are covered with a material with a low coefficient of friction, such as fluoroplastic.

Disconnector works as follows.

When switching is performed, rotation from the drive is transmitted by means of the lever 9 and the sleeve 7 to the rotary isolator 5, which leads to the closing or opening of the contacts of the disconnector.

The disconnector allows to reduce the height of the rotary insulator 5 because the flange of the insulator 5 is absent, the bearing is recessed into the lower part 4 of the insulator 5, in addition, the bracket 2 has a small height. Metal

The capacitance of the disconnector also decreases, since in this case there is no metal-intensive flange, and the mass of bracket 2 and axis 3 due to v decrease in bending moment (due to decreasing height of insulator 5 to flange height) also decreases. Installation of the bearing in the inner cavity of the lower part of the insulator provides good bearing protection against precipitation and does not require special protection devices. The bearing 8 practically does not increase the radial size of the lower part 4 of the insulator 5, since bearings with a small radial size can be used (for example, needle-shaped or metal fluoroplastic, in which the wall is 1.0-4 mm), and the outer flange is Isolator is excluded. Instead of the sleeve 7 and the bearing 8, one element can be used - a metal-fluoroplastic sliding bearing.

In addition, the material of the insulator is more efficiently used, since the inner part of the known insulators practically does not work for the mechanical load.

F o rmula of the invention

Claims (2)

1. A disconnector containing a frame, at least one rotary insulator, an axis and a rotation bearing, T such that, in order to reduce weight and dimensions and to simplify the design, the lower part of the rotary insulator is provided with an internal cavity in which the bearing is located mounted on an axis fixed to the frame. 2. Disconnector according to claim 1, about tl and - due to the fact that the internal cavity of the rotary insulator is sealed in the form of a sliding bearing. YAZIG.1 Fig.z