JPS62260397A - Hermetic electric machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to the improvement of gas-sealed electrical equipment, which is a pressure vessel housing equipment inside and has a high sealing degree and sufficient internal pressure strength. .

[Conventional technology]

In conventional electrical equipment of this kind, the container that houses the built-in equipment is basically made of thick steel plates that meet the required strength, and four blank plates formed into the required shape are welded together to form the original shape of the container, and the opening, etc. was formed by cutting into the shape required for the sealed structure.

[Problem that the invention seeks to solve]

Since conventional electrical equipment is configured as described above, complex welding deformations and dimensional changes occur at various locations during welding of the blank plates that make up the original form. For this reason, it is necessary to use a thick plate that allows these distortions and perform cutting, which increases material and processing costs. On the other hand, constructing a highly sealed container by welding together requires advanced welding and management techniques, both of which lead to higher costs. In addition, since a thicker plate than necessary is used, the weight increases, and heavy equipment is required for handling, transportation, and transportation, among other problems.

This invention was made in order to solve the above-mentioned problems, and aims to provide a low-cost sealed electrical device that minimizes the number of welds (four welds), eliminates cutting work, and is significantly lighter in weight. purpose.

[Means for solving problems]

Sealed electricity according to this invention 8! In this method, the lid of a sealed container that houses equipment is formed into a double structure consisting of an inner jacket and an outer jacket, and the shape required for the sealing structure is formed in the inner jacket mainly by plastic working, while the outer jacket itself has a shape required for the sealing structure. It has strength and is combined with the inner jacket to share the mechanical strength necessary for the sealed container.

[Effect]

The sealed container according to the present invention is composed of an inner jacket and an outer jacket, and the inner jacket mainly includes a plastically worked sealing structure.
Since the jacket is constructed as a strength structure and sealing welding and cutting are omitted, containers with high sealing reliability can be produced with reduced weight.

〔Example〕 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the main body 1 has a cylindrical shape with openings 2 on both sides for loading and unloading equipment, and a disk-shaped frame 3 is formed at both ends of the main body 1. In FIG. Reference numeral 4 denotes a lid body, which is composed of an inner cover 5 and an outer cover 6. The inner cover 5 has a concave packing Flt5m formed on the outer periphery by plastic working (for example, press working), and this packing groove 5a has the above-mentioned A packing 7 is fitted between the frame 3 and the picture frame 3. Manako's inner sheath 5 is provided with a plurality of reinforcing protrusions (5b) that strengthen the surface strength and integrate the inner sheath 5 and the outer sheath 6 at the same height as the gap between the inner sheath 5 and the outer sheath 6.
is installed. The outer sheath 6 has a substantially disk shape, and has a planar shape near the center to which an external device 8 can be easily attached, and correspondingly, the outer sheath 6 is provided with taps to which bolts are connected, as necessary. Further, the outer periphery of the outer cover 6 is provided with a necessary number of holes for connecting it to the body 1 with bolts or the like. Reference numeral 9 denotes an internal housing device, which operates by being mechanically connected to the external container 8 by communicating with the lid 4. Note that a sealed bearing 1 is installed in this communication part.
0 is set.

〔Effect of the invention〕

As described above, according to the present invention, the container body constituting the sealed container is overlapped with the sealing member mainly formed of a thin plate member on the inside with a gap in order to provide the necessary mechanical strength. Since the shape required for sealing is formed on the sealing member side by plastic processing, a lightweight container that does not require machining can be obtained at a low cost.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of section 2 in FIG. 1. In the figure, 1 is the body, 2 is the opening, 3 is the frame, 4 is the lid, 5 is the inner cover, 5& is the packing groove, 5b is the reinforcing convex part, 6 is the outer cover,
7 is a packing, and 9 is a storage device.

Claims (2)

[Claims] (1) In an electrical device equipped with a container that houses equipment inside and seals an insulating gas, the lid of the container has a double structure of an inner cover and a flat outer cover, and the outer periphery of the inner cover A sealed electrical device characterized in that a concave packing groove is formed by plastic working, and a reinforcing convex portion is provided inside the groove. (2) Claim 1, wherein a packing is fitted between a concave packing groove provided on the outer periphery of the inner cover and a disc-shaped frame formed at the end of the container body. sealed electrical equipment.