JPH0314970A - Rotary bearing device for gas insulation opening/closing device - Google Patents

Abstract

PURPOSE:To suppress friction and to reduce drive power by inseting a disc-like partitioning board set on a spindle in a groove orthogonal to a shaft having a filler therein. CONSTITUTION:On the atmospheric side of opening 9a at part of vessel 9 having insulation gas therein, a housing having a through hole 10 at its center is hermetically set. In a groove 10f formed vertical to the axial direction on the inner circumferential face of a hermetical condition retaining member 10e, a filler 12 such as grease is poured. Generally insulation gas with several values of atmospheric pressure is filled in the vessel 9, and a partitioning board 16 formed of thin plate is pressed against the atomospheric side of the groove 10f in response to gas pressure. At this time, the filler 12 is normally between the board 16 and the member 10e, whereby no sticking of both members prevents gas leakage. The friction generated at the time of rotation of a spindle 15 being only the viscous resistance of filler as well as the contact resistance of bearing part, the drive power is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a rotary bearing device for a gas-insulated switchgear that provides gas sealing.

(Prior Art) Generally, a gas insulated switchgear has a contact section housed in a container filled with an insulating gas such as SF or gas, and the contact section is driven by an operating device provided outside the container. A bearing device with an insulating gas sealing function is used in a portion that transmits the driving force into the container.

Here, the structure of a conventional rotary bearing device will be explained using FIG. 6. That is, an opening 1a is provided in a part of a container 1 filled with an insulating gas. A housing 2 having a through hole 2a in the center is airtightly attached to this frontage 1a via a packing 3. In addition, a bearing 4 is provided in the through hole 2a.
A main shaft 6, which is rotatably supported at , 5 and transmits driving force, is inserted therethrough.

Further, two Y-shaped packings 7 and 8 are installed in the through hole 2a to maintain airtightness between the housing 2 and the main shaft 6.

By the way, circuit breakers, disconnectors, etc. that make up gas-insulated switchgear generally operate extremely infrequently. Therefore, the lubricant on the lips of the packings 7 and 8 is removed, and the
8 may stick to the main shaft 6.

As a result, a phenomenon is observed in which the frictional force when rotating the soil shaft 6 increases. Therefore, an operating device that takes this frictional force into consideration is required. However, if the frictional force is small, excessive force will act on each part, damaging the components. Furthermore, there may be cases where airtightness cannot be maintained due to abrasion and deterioration of the packings 7 and 8.

(Problems to be Solved by the Invention) As described above, in the conventional rotary bearing device, airtightness is maintained by packing, which may lead to an increase in driving force and a decrease in reliability against gas leakage. be.

The present invention has been developed in consideration of the above points, and an object of the present invention is to provide a rotary bearing device for a gas-insulated switchgear that is highly reliable against gas leakage and does not increase driving force.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, the present invention has a through hole in the center through which the main shaft is inserted, and is shaped perpendicularly to the axial direction on the inner circumferential surface. A housing provided with a groove is airtightly attached to the opening of the container, a bearing is provided in the through hole to rotatably support the main shaft in the housing, and a filler is injected into the groove, and a circle whose outer periphery is inserted into the groove is provided. A plate-shaped partition plate is attached to the main shaft.

(Function) With this configuration, the partition plate that forms the gas seal part is in contact with the housing via the filler, so the gas seal part does not stick and has high reliability against gas leakage, and rotation with low driving force. A bearing device can be provided.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. As shown in FIG. 1, a container 9 filled with insulating gas
An opening 9a is provided in a part of the. On the atmosphere side of this opening 9a, there is a housing IO having a through hole 10a in the center.
is installed airtight. The housing 10 includes a pair of hollow disk-shaped support members 10c and 10d that have an outwardly protruding convex portion 10b and are arranged opposite each other, and this support member 1.
An airtight retaining member 10e is provided airtightly installed between 0c and 10d with a packing l1 interposed therebetween. A groove 10f consisting of a gap is formed in the inner circumferential surface of the airtight member 10a so as to be orthogonal to the axial direction. A deformable filler 12 such as grease is injected into the groove 10f.

Note that the supporting members 10c, 10d and the airtight maintaining member 10e may be integrally constructed.

In addition, a bearing 13 is attached to the convex portion 10b of the support member in the through hole 10a. A main shaft 15 that is rotatably supported by 14 and transmits driving force is inserted through the main shaft 14 .

At a portion of the main shaft 15 facing the groove 10f of the airtight maintenance member, a disk-shaped partition plate 16 whose outer periphery is inserted into the groove 10f is provided.
is fixed. As shown in FIG. 2, this partition plate 16 has a plurality of recesses 16a formed therein for storing the filler 12 at the portion inserted into the groove 10f. Incidentally, the partition plate 16 may be formed with a plurality of holes 16b as shown in FIG. 3 instead of the recesses.

Next, the functions and effects of the structure of this embodiment will be explained. Generally, the container 9 is filled with an insulating gas of several atmospheres, so if the partition plate 16 is formed of a thin plate, the partition plate 16 will be pressed toward the atmosphere side of the groove 10f depending on the gas pressure. At this time, since the filler l2 is always present between the partition plate l6 and the airtight member 10a, the two members do not stick together, and gas leakage can be prevented.

Moreover, the frictional force generated when rotating the main shaft 15 is
The contact resistance of the bearing part and the viscous resistance of the filler can be kept low. Therefore, the driving force can be made as small as possible.

In this embodiment, one seal portion is provided, but a multi-stage structure such as a two-stage structure as shown in FIG. 5 may also be used.

〔Effect of the invention〕

As explained above, in the present invention, a housing having a through hole in the center through which the main shaft is inserted and a groove formed on the inner peripheral surface perpendicular to the axial direction is airtightly attached to the opening of the container.
A bearing that rotatably supports the main shaft in the housing is provided in the through hole, and a filler is injected into the groove and a disk-shaped partition plate, in which the outer sleeve is inserted into the groove, is attached to the main shaft. It is possible to provide a rotary bearing device for a gas insulated switchgear that is free from sticking, has high reliability against gas leakage, and has low driving force.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a rotary bearing device showing an embodiment of the present invention, FIGS. 2 and 3 are partial sectional views of different shapes of the partition plate shown in FIG. 1, and FIG. FIG. 5 is a partial cross-sectional view of a rotary bearing device showing another embodiment of the present invention, and FIG. 6 is a partial cross-sectional view of a conventional rotary bearing device. be. 9...Container 9a...Opening IO...Housing 10g...Through hole 10b...Protrusion
10c, 10d...Supporting member 10e...Airtight maintenance member 10f...Groove l1...Packing 1
2... Filler 13. 14... Bearing 15.
... Main shaft l6 ... Partition plate 16a ... Recess 1
6b...hole 2nd figure 3rd figure

Claims (1)

[Claims] A main shaft that is inserted into an opening provided in a container filled with insulating gas and transmits driving force is airtightly supported, the main shaft being airtightly attached to the opening of the container and having a through hole in the center through which the main shaft is inserted. a housing including a groove formed on an inner circumferential surface perpendicular to the axial direction; a bearing located in the through hole and rotatably supporting the main shaft in the housing; and a filler injected into the groove. A rotary bearing device for a gas insulated switchgear, comprising a disk-shaped partition plate attached to the main shaft and having an outer periphery inserted into the groove.