JPH0665621U - Sliding bearing device - Google Patents

Abstract

(57) [Abstract] [Purpose] While maintaining the self-lubricating property required during non-lubricated operation, it is excellent in impact resistance, wear resistance and toughness, and it is possible to expand the range of application as a sliding bearing device. . [Structure] The slidable member 2 on the entire inner peripheral surface of the bearing body 1 side
Is composed of a C / C composite material in which carbon and carbon fibers are intricately entangled with each other. Further, preferably, the rotation-side sleeve member 3 slidingly contacting the sliding member 2 is formed by welding a hard metal to the outer peripheral surface of the base material, thereby improving the wear resistance and toughness of the entire plain bearing device. It will be configured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slide bearing device, such as a vertical shaft pump, which requires a short-time non-lubrication operation, that is, a dry operation, when it is started.

[0002]

[Prior art]

 Conventionally, as a sliding bearing device capable of non-lubricated operation for a short time, the slidable member formed on the entire inner peripheral surface of the bearing body is composed of a single carbon material that itself has lubricity. A so-called carbon bearing is known. In addition to this, when extremely high wear resistance is required, a slide bearing device in which the bearing body is made of ceramic or a hard metal material is also known.

[0003]

[Problems to be solved by the device]

 Among the conventional plain bearing devices mentioned above, the carbon bearing composed of a simple carbon material has self-lubricating property, and therefore it is effective, for example, in a short non-lubricating operation at the time of starting the vertical pump. On the other hand, it tends to be damaged when used in locations subject to strong impacts. Also, bearings made of ceramics or hard metal materials have excellent impact resistance, wear resistance and toughness, but lack lubricity. In particular, it is not suitable for use where a short-time, non-lubricated operation is required.

The present invention has been made in view of the above circumstances, and provides a slide bearing device capable of improving impact resistance, wear resistance and toughness while maintaining excellent self-lubricating property. The purpose is to do.

[0005]

[Means for Solving the Problems]

 To achieve the above object, a sliding bearing device according to the present invention comprises a bearing main body, a sliding member formed on the entire inner peripheral surface of the bearing main body, and a sliding contact with the inner peripheral surface of the sliding member. In a sliding bearing device including a rotating sleeve member having an outer peripheral surface, the sliding member is made of a composite material of carbon and carbon fiber.

[0006]

[Action]

 According to the present invention, the sliding member on the bearing body side is made of a composite material in which carbon and carbon fibers are intricately entangled with each other, so that the self-lubricating property of the carbon itself is maintained. It is possible to remarkably expand the range of application as a slide bearing device by improving impact resistance, wear resistance and toughness.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing a plain bearing device according to an embodiment of the present invention. In the figure, reference numeral 1 is a bearing body made of a base material such as hard metal, and has a flange portion 1b at one axial end of the cylindrical base portion 1a. Reference numeral 2 denotes a slidable member formed on the entire inner peripheral surface of the bearing body 1 and is made of a C / C composite material in which carbon and carbon fibers are compounded. Reference numeral 3 denotes a rotary sleeve member having an outer peripheral surface that is in sliding contact with the inner peripheral surface of the slidable member 2 and into which the rotary shaft 4 is inserted and fixed, and is made of stainless steel.

In the sliding bearing device having the above-described structure, the sliding member 2 on the bearing body 1 side is made of a composite material composed of carbon having self-lubricating properties and carbon fiber. For example, when used as a bearing for a vertical shaft pump, it will not be damaged even when a strong impact is applied while maintaining lubricity during a short non-lubricating operation at the time of pump startup, and also improved wear resistance and toughness. The scope of application can be expanded.

FIG. 2 is a vertical sectional view showing a plain bearing device according to another embodiment of the present invention. In the figure, only the constituent material of the rotary sleeve member 3 is different from that of the embodiment shown in FIG. 1, and the other constituent members are the same as those of FIG. And their description is omitted.

That is, in the embodiment shown in FIG. 2, the rotary side sleeve member 3 is provided with nickel, titanium, tungsten carbide tool, on the outer peripheral surface of the stainless steel base material 3 a facing the slid member 2. The hard metal 3b containing one or more kinds of chromium carbide, niobium carbide, etc. is welded by overlay welding or the like. According to this embodiment, the sliding movement of the bearing body 1 side is made possible. The wear resistance of the rotary sleeve member 3 together with the member 2 is improved, and the wear resistance and toughness of the entire slide bearing device are improved, so that the durability thereof can be enhanced.

[0011]

[Effect of device]

 As described above, according to the present invention, the sliding member on the bearing body side is made of a composite material made of carbon and carbon fiber, so that the sliding member is made of a simple carbon material. As with the bearings of the above, the wear resistance, impact resistance and toughness can be remarkably improved while maintaining self-lubrication and enabling non-lubricated operation for a short time. As a result, not only vertical shaft pumps that require dry operation at startup, but also sliding bearing devices such as devices that receive a strong impact during operation can be applied to a wider range of applications.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a plain bearing device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a slide bearing device according to another embodiment of the present invention.

[Explanation of symbols]

 1 Bearing body 2 Slidable member 3 Rotating sleeve member

Claims (1)

[Scope of utility model registration request] 1. A bearing main body, a sliding member formed on the entire inner peripheral surface of the bearing main body, and a rotation-side sleeve member having an outer peripheral surface in sliding contact with the inner peripheral surface of the sliding member. In the sliding bearing device, the sliding member is made of a composite material made of a composite of carbon and carbon fiber.