JPS60188662A - Leading device of sealed receptacle - Google Patents

Abstract

PURPOSE:To show seal effect even under conditions such as high pressure or high temperature by providing a metallic bushing and a ceramic cylinder and fixing the joining portion between the bushing and the cylinder through a Kovar ring by brazing. CONSTITUTION:A hollow bushing 7 formed by material which can be welded or brazed is threaded on an opening portion 6 of a receptacle 1. A bar-like piercing body 9 formed by a conductor and provided with a flange portion 8 is inserted in the hollow portion of the bushing 7 in such a manner as to project into the interior and the exterior of the receptacle 1. The flange portion 8 is positioned in the interior of the receptacle 1, and a cylinder 10 formed by ceramic material of alumina ceramics for surrounding the piercing body 9 is interposed between the flange portion 8 and the bushing 7. The piercing body 9 is insulated by the cylinder 10. Kovar rings 11, 12 are fitted to each outer peripheral portion of butt portion of the cylinder 10, the bushing 7 and the flange portion 8 and these three members are airtightly fixed by brazing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an opening device for a sealed container in which a high-pressure or high-temperature fluid or gas is sealed.

[Technical Background of the Invention and Problems thereof] Among electrical equipment, especially in the electric motor used for pump operation, a cooling liquid such as oil or water is used as a cooling medium to cool the windings of the rotating electric machine. Some are enclosed within a frame, and are usually called liquid-sealed rotating electric machines.

In such a liquid-sealed rotating electric machine, high reliability is required for sealing of the sealed liquid and heat resistance at the frame penetration portion of the lead wire.

Conventionally, a lead-out device for electrical equipment such as a liquid-sealed rotating electric machine has been used to attach a metal seal ring to a part of a conductor that has a flange that passes through the opening of the frame through a rubber/plastic insulation coating. An insulating ring interposed between the ring and the flange is integrally molded, and an O-ring made of Piton, ethylene propylene rubber, silicone rubber, etc. is inserted into the O-ring groove of the metal seal ring,
This O-ring is deformed so as to be in close contact with the metal seal ring and the frame. (Unexamined Japanese Patent Publication No. 59-2124
7) and the sealed liquid is at several atmospheres to several tens of atmospheres, and further 1
It is designed to withstand operating temperatures of around 00°C.

However, in recent years, it has become necessary to seal the high-pressure water as high as 2QQKfcxl that enters the pump under the conditions of use of the pump.

Under such harsher conditions, conventional sealed liquid seals in which an insulating ring is molded onto a conductor with rubber or plastic insulation material deform the insulating ring due to the pressure of the filled liquid, causing the mold material to deform. The disadvantage is that the adhesive surface peels off and pressure sealing cannot be performed.

In addition, since the sealing material with the frame is a rubber O-ring as described above, its deterioration is accelerated by the heat of the electric machine and the pressure of the filled liquid, and the sealing performance is lost, causing the electric machine to stop operating. There was a serious problem in that the O-ring had to be replaced.

[Object of the invention] Eye of the invention! One object of the present invention is to provide an opening device for a sealed container that can exhibit a sufficient sealing effect almost permanently even under conditions of high pressure or high temperature of the fluid or gas sealed in the container.

[Summary of the invention]

In order to achieve the above object, the outlet device of the present invention includes a hollow metal bushing that is airtightly fixed by welding or brazing to the mouth of a container that stores high-pressure fluid or gas inside, and A rod-shaped penetrating body that penetrates the hollow part from the outside to the inside of the container, a ceramic cylinder that is interposed between the penetrating body and the inside of the container of the bushing and surrounding the penetrating body, and this cylinder. It consists of a ring made of Conocool that surrounds each joint of the above-mentioned member and is airtightly fixed by brazing, and the sealing part is mechanically (i. It is something.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a configuration diagram of a spouting part of an electric motor showing an embodiment of a spouting device for a sealed container according to the present invention. Enclosed water 2 is inside a stator frame or container 1 of a liquid-sealed motor, and an outlet device 5 is shown that connects a stator coil 3 to an external cable 4 through the container 1 in an airtight manner. .

FIG. 2 is an enlarged sectional view of the opening device, in which a hollow bushing 7 made of a material that can be welded or brazed, such as copper alloy, aluminum alloy, or stainless steel, is attached to the opening 6 of the container 1. Attach the screws. A rod-shaped penetrating body 9 made of a conductor and provided with a flange 8 is inserted into the hollow portion of the bushing 7 so as to protrude into the inside and outside of the container 1.

The 6 parts 8 are located inside the container 1, and a cylinder 10 made of a ceramic material of alumina porcelain surrounding the penetrating body 9 is interposed between the collar part 8 and the bushing 7. The penetrating body 9 is insulated by. A ring 11 made of Kovar is attached to the outer periphery of each of the abutting portion between the cylindrical body 1O and the bushing 7 and the abutting portion between the cylindrical body 1O and the collar portion 8.
, 12 and by brazing between these three members,
Fix tightly.

Further, a cylindrical insulator 13 is inserted into the gap between the bushing 7, the cylindrical body 10, and the penetrating body 9 to securely fix these members together and to insulate the space between the bushing 7 and the penetrating body 9. do. Then, on the outside of the container 1, the container 1 and the bushing 7 are hermetically fixed by welding or brazing to form a sealing portion 14.

A connecting wire 3a of the stator coil 3 is connected to the end of the penetrating body 9.
to be electrically connected by brazing or soldering.

Next, the operation of the above embodiment will be described. Even if the pressure of the sealed liquid 2 is high, the seal portion is fixed by a strong member, so it will not deform or deteriorate and exhibits extremely reliable sealing performance.

That is, the seal portion is the butt portion between the bushing 7 and the cylinder 10,
and at the abutting portion between the collar portion 8 of the penetrating body 9 and the cylindrical body 10.

Since these abutting portions are brazed and fixed by metal rings 11 and 12, even if a strong force is applied to the core portion by the high-pressure sealed liquid 2, the core portion will not be deformed and the sealing performance will not be impaired.

Further, one seal portion is located at the contact portion between the container 1 and the bushing 7. This contact portion is strongly sealed between the container 1 and the bushing 7 on the outer circumferential surface 1 of the container 1 by a sealing portion 14 made by welding or brazing, so that the contact portion can also sufficiently withstand strong internal pressure. be able to.

As mentioned above, this device has 200 times less leakage than the conventional sealing device that uses a rubber O-ring.
The leakage of the filled liquid is completely prevented even when the filled liquid is at a high pressure of up to 100 mt.

In addition, the connection wire 3 of the stator coil is connected to the through body 9 where the electric machine generates electricity.
It can be fully compared to the heat during brazing, and in general, the pressure resistance and side heat resistance can be said to be permanent.

The present invention is not limited to the above-described embodiments, but can also be applied to a penetrating portion of a sensing element in a measuring device or the like that obtains information on the inside of a container. Figure 3 shows high pressure water 2 inside container 1.
1, and a water detector 22 is attached to the container 1 in order to know the amount of gas 20 such as air accumulated in the upper part of the container 1. In this embodiment, a flange portion 8 in the middle of a penetrating body 9 which is an element portion is shown.
In addition, a water detector 22 having a threaded portion at its base end is prepared. This penetrating body 9 is passed through the cylindrical body 10 and the bushing 7. The cylindrical body 10 is then brazed to the through body 9 and the bushing 7 at their abutting portions using Kovar rings 11 and 12, as described in the above embodiment. A nut 15 is screwed into the threaded portion of the penetrating body 9 to firmly support the bushing 7. Then, the moxibustion device configured as described above is inserted into the opening 6t of the container 1, and the bushing 7 and the container 1 are hermetically welded to form a sealing portion 14.

Furthermore, in the above-mentioned embodiments, the explanation has been made assuming that the through body 9 is provided with the flange 8, but as shown in FIG. 10
The structure may be modified in various ways, such as brazing through the ring 12, or brazing by inserting an intermediate Kovar material into the gap between the two.

[Effects of the Invention] According to the present invention, since the bushing is made of metal, it can be welded or brazed with the container, and the cylindrical body is made of ceramic and the joint portion is brazed through a Kovar ring. Since the seals can be fixed together, all the seal parts are strong and have the effect of being able to exhibit permanent reliability even under high pressure or high temperature.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the opening portion of a liquid-sealed motor showing an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of the pick-out device shown in FIG. 1, and FIGS. 3 and 4 are cross-sectional views of the pick-out device showing other embodiments of the present invention. 1 container 4... outlet device 6... opening 7... bushing 9... penetrating body 10... cylindrical body 11.12... ring. Agent Patent attorney Kensuke Chika (and 1 other person) Figure 1

Claims (1)

[Claims] A hollow metal bushing that is airtightly fixed by welding or brazing to the opening of a container that stores high-pressure fluid or gas inside, and a rod-shaped penetrating body that penetrates the hollow part of the bushing from the outside to the inside of the container. A ceramic cylindrical body is interposed between the penetrating body and the inside of the container of the bushing and surrounds the negative connection body, and the respective joints of this cylindrical body and the above member are surrounded and hermetically sealed by brazing. An opening device for sealed containers consisting of a Kovar ring fixed to the container.