JPH08109924A - Underwater bearing - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To prevent the shaft of a submersible rotating machine from being damaged and to eliminate the risk of peeling due to temperature differences. In an underwater bearing used for an underwater rotating machine such as an underwater electric motor or an underwater pump, a first bearing material 5 having good slidability and a reinforcing material 6 such as carbon fiber or glass fiber are laminated to form a laminated portion 7 And a bearing material layer made of only the second bearing material having no sliding member and having good slidability is provided on the sliding surface of the laminated portion with the shaft of the underwater rotating machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater bearing used in an underwater rotating machine such as an underwater electric motor or an underwater pump, and in particular, it can prevent the shaft of the underwater rotating machine from being damaged and may cause peeling due to temperature difference. Not about submersible bearings.

[0002]

2. Description of the Related Art Generally, in a submersible bearing used in an underwater rotating machine such as an underwater electric motor or an underwater pump, conventionally, carbon, phenol resin,
Many non-metal materials such as rubber have been used.

Here, although carbon has good slidability, it is weak against impact force and bending and is likely to be chipped. Phenolic resins and rubbers have good slidability and impact resistance, but have low mechanical strength.

Therefore, recently, in order to make up for such a lack of mechanical strength, for example, as shown in FIGS. 3 (a) and 3 (b), a bearing material 1 and a reinforcing material such as carbon fiber or glass fiber. It has been used by laminating 2 and 3 (3 is a laminated portion), or by attaching the bearing material 1 to the metal plate 4 as shown in FIG.

However, in an underwater bearing in which the reinforcing material 2 is laminated on the bearing material 1, the bearing material 1 is worn during use and the reinforcing material 2 is exposed on the sliding surface, and as a result, the bearing material 1 and the shaft of the underwater rotating machine are exposed. There is a problem of rubbing and scratching the shaft.

On the other hand, in the underwater bearing in which the bearing material 1 is attached to the metal plate 4, since the linear expansion coefficient of the bearing material 1 and the metal plate 4 are different, the heat acting on the adhesive surface due to the temperature rise during the operation of the underwater rotating machine. There is a problem that the stress causes the bonded portion with the metal plate 4 to peel off.

[0007]

As described above, the conventional underwater bearing has a problem that the shaft of the underwater rotating machine is damaged or the bonded portion with the metal plate is peeled off. It is an object of the present invention to provide an underwater bearing which can prevent the shaft of a submersible rotating machine from being damaged and which is free from the risk of peeling due to a temperature difference.

[0008]

In order to achieve the above object, in an underwater bearing used in an underwater rotating machine such as an underwater electric motor or an underwater pump, first, the invention according to claim 1 has good slidability. The first bearing material and a reinforcing material such as carbon fiber or glass fiber are laminated to form a laminated portion, and the sliding surface of the laminated portion with the shaft of the underwater rotating machine does not have a reinforcing material. A bearing material layer made of only a good second bearing material.

Further, in the invention according to claim 2, the first bearing material having good slidability and the short piece-like reinforcing material such as carbon fiber or glass fiber are mixed to form a mixed portion, and the mixed portion is formed. A bearing material layer made of only the second bearing material having no reinforcing material and having a good slidability is provided on the sliding surface of the portion of the underwater rotating machine shaft.

In particular, the bearing material layer is provided to have a thickness of 1 to 5 mm based on the inspection cycle of the underwater bearing body. Further, the same material is used as the first bearing material and the second bearing material.

[0011]

Therefore, in the underwater bearing according to the present invention, by providing a bearing material layer made of only a bearing material having a good slidability without a reinforcing material on the sliding surface with the shaft of the underwater rotary machine, Even if the bearing surface is worn, the reinforcing material is not exposed and the shaft does not come into contact with the reinforcing material, so that the shaft is not damaged.

Further, by using only a composite material in which a bearing material having good slidability and a reinforcing material are laminated or mixed, unlike the above-mentioned reinforcement by the metal plate, there is no adhesive portion with the metal portion, There is no fear of peeling due to temperature difference. Further, by using the same material as the bearing material of the laminated portion or the mixed portion and the bearing material of the bearing material layer, there is no fear of peeling due to a temperature difference.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. (First Embodiment) FIG. 1 is a diagram showing a configuration example of an underwater bearing according to a first embodiment of the present invention. FIG. 1 (a) is a plan view and FIG. 1 (b) is FIG. 1 (a). ) Is a cross-sectional view taken along line BB of FIG.

That is, the underwater bearing of this embodiment is shown in FIG.
, A first bearing material 5 having a good slidability and a reinforcing material 6 are laminated to form a laminated portion 7, and a sliding surface of the laminated portion 7 with a shaft of an underwater rotating machine (not shown). In addition, the bearing material layer 8 made of only the second bearing material having no sliding member and good sliding property
Is provided.

Here, as the first bearing material 5 and the second bearing material of the bearing material layer 8, for example, a non-metal material such as carbon, phenol resin or rubber can be used. Further, as the reinforcing material 6, for example, carbon fiber or glass fiber can be used.

Further, it is preferable that the laminated portion 7 is provided with a thickness such that the stress of the laminated portion 7 is equal to or less than the allowable stress of the material based on the load applied to the bearing. Furthermore, the bearing material layer 8 is preferably provided with a thickness of, for example, 1 to 5 mm based on the inspection cycle of the submersible bearing body.

Next, in the underwater bearing of the present embodiment having the above-mentioned structure, the laminated portion 7 comprises the first bearing material 5 having good slidability and the reinforcing material 6 such as carbon fiber or glass fiber. It is a laminated composite material, and this part plays a role of supporting the load applied to the bearing. And this laminated portion 7
Has a thickness such that the stress of the laminated portion 7 is equal to or less than the allowable stress of the material due to the load applied to the bearing, so that the conventional bearing material having good slidability can be attached to the metal plate. Since it is integrally formed of the same material as that reinforced by means of, it does not peel off even if it expands due to temperature rise during operation of the underwater rotating machine, and does not break even under load.

Further, since the bearing material layer 8 does not have a reinforcing material as in the prior art, even if the bearing surface is worn during use, the reinforcing material is not exposed and the shaft does not come into contact with the reinforcing material. Will not be hurt.

Furthermore, since the bearing is composed only of the composite material in which the first bearing material 5 and the reinforcing material 6 having good slidability are laminated, unlike the above-mentioned reinforcement by the metal plate, Since there is no adhered part, there is no fear of peeling due to temperature difference.

Furthermore, the first bearing material 5 of the laminated portion 7
By using the same material as the second bearing material of the bearing material layer 8 and the second bearing material, there is no fear of peeling due to a temperature difference. The required material strength of the laminated portion 7 may be obtained by increasing the thickness of the composite material.

As described above, in the submersible bearing of this embodiment, the first bearing material 5 having good slidability and the reinforcing material 6 are laminated to form the laminated portion 7, and the laminated portion 7 is underwater. The bearing material layer 8 made of only the second bearing material having no sliding member and having good slidability is provided on the sliding surface with the shaft of the rotating machine.

Therefore, it is possible to prevent the shaft of the underwater rotating machine from being damaged, and it is possible to obtain an underwater bearing which is free from the risk of separation due to a temperature difference. (Second Embodiment) FIG. 2 is a diagram showing an example of the structure of an underwater bearing according to a second embodiment of the present invention. FIG. 2 (a) is a plan view and FIG. 2 (b) is FIG. 2 (a). ) Is a cross-sectional view taken along line CC of FIG.

That is, the underwater bearing of this embodiment is shown in FIG.
As shown in FIG. 1, the first bearing material 9 having good slidability and the short strip-shaped reinforcing material 10 are mixed to form the mixing portion 11, and the mixing portion 11 is used for an underwater rotating machine (not shown). A bearing material layer 12 made of only a second bearing material having no sliding member and having good slidability is provided on the sliding surface with the shaft.

Here, as the first bearing material 9 and the second bearing material of the bearing material layer 12, for example, a non-metal material such as carbon, phenol resin or rubber can be used.

As the reinforcing material 10, for example, carbon fiber or glass fiber can be used. further,
As the mixing unit 11, based on the load applied to the bearing,
It is preferable to provide the mixed portion 11 with a thickness such that the stress of the mixed portion 11 is equal to or less than the allowable stress of the material.

Furthermore, it is preferable that the bearing material layer 12 is provided with a thickness of, for example, 1 to 5 mm based on the inspection cycle of the submersible bearing body. Next, in the submersible bearing of the present embodiment configured as described above, the mixing portion 11 includes the first bearing material 9 having good slidability and the short piece-shaped reinforcing material 10 such as carbon fiber or glass fiber. As a mixed composite material,
This part plays a role of supporting the load applied to the bearing. The thickness of the mixing portion 11 is set such that the stress of the mixing portion 11 is equal to or less than the allowable stress of the material due to the load applied to the bearing, so that the conventional bearing material having good slidability can be obtained. Compared to those reinforced by sticking to a metal plate, it is integrally molded with the same material,
Even if it expands due to the temperature rise during the operation of the underwater rotating machine, there is no fear of peeling and it will not break even under load.

Further, since the bearing material layer 12 has no reinforcing material as in the prior art, even if the bearing surface is worn during use, the reinforcing material is not exposed and the shaft does not come into contact with the reinforcing material. Will not be hurt.

Further, since the bearing is composed only of the composite material in which the first bearing material 9 having good slidability and the reinforcing material 10 are mixed, unlike the above-described reinforcement by the metal plate, the metal portion and Since there is no adhered part, there is no fear of peeling due to temperature difference.

Furthermore, since the same material is used as the first bearing material 9 of the mixing section 11 and the second bearing material of the bearing material layer 12, there is no fear of peeling due to temperature difference.

For the required material strength of the mixing section 11, the thickness of the composite material should be increased before use. As described above, in the submersible bearing of this embodiment, the first bearing material 9 having good slidability and the short strip-shaped reinforcing material 10 are mixed to form the mixing portion 11, and the mixing portion 11 is formed. A bearing material layer 12 made of only a second bearing material having no sliding member and having good slidability is provided on the sliding surface of the shaft 11 of the underwater rotating machine (not shown).

Therefore, it is possible to prevent the shaft of the underwater rotating machine from being damaged, and it is possible to obtain an underwater bearing which is free from the risk of separation due to a temperature difference. The present invention is not limited to the above embodiments, but can be implemented in the same manner as described below.

(A) In each of the above embodiments, the same material is used as the first bearing material 5 and the second bearing material of the bearing material layer 8, but the present invention is not limited thereto. Not a thing. (B) In each of the above embodiments, the thickness of the bearing material layers 8 and 12 is not limited to the thickness of 1 to 5 mm.

[0033]

As described above, according to the present invention, in a submersible bearing used for an underwater rotating machine such as an underwater electric motor or an underwater pump, the first bearing material having good slidability and carbon fiber, glass fiber or the like is used. Bearing material formed of only the second bearing material having no sliding member and having no reinforcing material on the sliding surface of the laminated portion with the shaft of the underwater rotating machine. A layer is provided, or a first bearing material having good slidability and a reinforcing material in the form of a short piece such as carbon fiber or glass fiber are mixed to form a mixing portion, and the shaft of an underwater rotating machine of the mixing portion. Since the bearing material layer made of only the second bearing material having no sliding member and having good slidability is provided on the sliding surface of and, it is possible to prevent the shaft of the underwater rotating machine from being damaged, Moreover, it is possible to provide an underwater bearing that is free from the risk of peeling due to temperature differences.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a submersible bearing according to the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the underwater bearing according to the present invention.

FIG. 3 is a configuration diagram showing an example of a conventional underwater bearing.

FIG. 4 is a configuration diagram showing another example of a conventional underwater bearing.

[Explanation of symbols]

5 ... 1st bearing material, 6 ... Reinforcement material, 7 ... Laminated part, 8 ... Bearing material layer, 9 ... 1st bearing material, 10 ... Reinforcement material, 11 ... Mixing part, 12 ... Bearing material layer.

Claims (4)

[Claims] 1. In an underwater bearing used in an underwater rotating machine such as an underwater electric motor or an underwater pump, a first bearing material having good slidability and a reinforcing material such as carbon fiber or glass fiber are laminated to form a laminated portion. And a bearing material layer made of only a second bearing material having no sliding member and having good slidability is provided on the sliding surface of the laminated portion with respect to the shaft of the underwater rotating machine. Underwater bearing. 2. In an underwater bearing used for an underwater rotating machine such as an underwater electric motor or an underwater pump, a first bearing material having good slidability and a short piece-like reinforcing material such as carbon fiber or glass fiber are mixed. And a bearing material layer formed of only a second bearing material having no sliding member and having a good slidability is provided on a sliding surface of the mixing portion which is to slide on the shaft of the underwater rotating machine. Underwater bearing feature. 3. The underwater bearing according to claim 1, wherein the bearing material layer is provided to have a thickness of 1 to 5 mm based on an inspection cycle of the underwater bearing body. 4. The underwater bearing according to claim 1, wherein the same material is used as the first bearing material and the second bearing material.