CN201096147Y - Floating slide bearing with lubricating medium storage function for perpendicular mounting rotating machinery - Google Patents

Abstract

A lubricating medium capable of maintaining a bearing outer ring with a small clearance during operation, a floating sliding bearing with a function of storing lubricating medium for a rotating machine installed vertically, including a shaft (3) and a bearing seat (1) of the rotating machine , Bearing (2). The outer ring of the designed floating sliding bearing has annular concentric circular grooves (4), and the diameter of the circular grooves (4) is smaller than the diameter of the surface of the outer ring. This concave annular circular groove (4) can store the lubricating medium, and can continuously supply or supplement the lubricating medium lost by the outer ring of the bearing (2) during work, and maintain the lubricating medium of the outer ring of the bearing (2) for a long time Good lubrication reduces friction and wear between the contact surfaces of the bearing (2) and the bearing housing (1), prolongs the life of the bearing and improves mechanical efficiency. This bearing is suitable for various vertically installed shafting structures using sliding bearings.

Description

Floating plain bearings with lubricant storage function for vertically mounted rotating machines

technical field

The utility model relates to a floating sliding bearing with the function of storing lubricating medium for a vertically installed rotating machine. Especially used in vertically installed rotating machines with heavy loads and frequent pressure fluctuations, so that the bearings can be automatically centered according to changes in working pressure during work, and a dynamic lubricating oil film can be formed on the working interface to reduce friction and wear on the mating surface , Extend bearing life.

Background technique

It is currently known that the working pressure of a rotating shaft working in a variable load environment fluctuates continuously, and this change is random. In order to improve the working life of the machine under variable load or rated working pressure, improving the bearing life is a problem that must be solved. Especially in the environment of high pressure, impact load and abrasive medium that may enter the lubricating medium, the working conditions of the bearing will deteriorate rapidly, which may lead to premature mechanical failure due to bearing damage. This phenomenon often occurs under harsh working environment conditions Petroleum and mining machinery.

The special structure of the floating slide bearing can improve the life of the bearing in the above environment. However, the working conditions require that the fit clearance of the bearing must be such that the inner ring is larger and the outer ring is smaller, which will inevitably lead to greater wear of the outer ring than the inner ring when the bearing is floating, and the asynchronous wear of the inner and outer rings of the bearing will cause It directly affects the working performance of floating sliding bearings and shortens the working life of vertically installed machinery (such as oil drill bits).

For rotating machines with variable loads, especially floating sliding bearings in vertically installed equipment such as drill bits and blowout preventers while drilling, the space for storing lubricating media is limited by the structure, and the lost lubricating oil or grease cannot be replenished. Therefore, how to make the floating bearing keep a lubricating oil film on the friction interface for a long time in the vertical installation environment, realize the automatic centering and dynamic pressure lubrication of the bearing, reduce the friction and wear between the working surfaces, and improve the life of the mating surface , is an urgent problem to be solved in the application of floating sliding bearings. The usual solution is to use external power to deliver pressure oil to achieve the purpose of dynamic pressure lubrication. This solution is limited to the space structure, and the equipment that cannot supplement the lubricating medium, such as the roller cone bit working in the downhole, is difficult to apply.

Contents of the invention

The utility model is to solve the problem of making the lubricating interface have a continuous lubricating oil film within a period of time, thereby improving the working life of the equipment.

The utility model proposes a lubricating medium that can maintain the bearing outer ring with a small gap during the working period to form an effective dynamic pressure oil film and reduce energy loss caused by friction and wear between the bearing outer ring and the bearing seat Non-locating bearings with early failure of the outer ring caused by damage to the bearing surface. Especially when there is an impact load, avoid direct contact between the outer ring of the bearing and the inner surface of the bearing housing as much as possible, reduce the friction and wear of the outer ring of the bearing, and increase the working life of the floating bearing.

The technical scheme adopted by the utility model solution technology is: the utility model includes a bearing seat 1, a floating sliding bearing 2 and a shaft 3, and is characterized in that the bearing 2 is processed with an annular circular groove, as shown in the accompanying drawings. The space between the bearing seat 1, the bearing 2 and the shaft 3 is filled with a lubricating medium at the initial stage of work, and the lubricating medium can be lubricating oil or lubricating grease. The outer ring of the designed floating sliding bearing 2 has one or more concentric annular circular grooves 4, as shown in accompanying drawings (2, 3) and accompanying drawings (5, 6). The diameter of the circular groove 4 is smaller than the diameter of the outer ring surface, and its value is 0.001 mm to 2.00 mm. This sunken annular circular groove 4 can store the lubricating medium, and can continuously supply or supplement the lubricating medium lost by the outer ring of the bearing 2 during operation.

Since the lubricating medium has a certain viscosity and adsorption performance, and has a certain adsorption effect with the metal surface, the lubricating medium can be gradually released from the recessed oil storage annular groove 4, supplementing the outer ring of the bearing 2 and the bearing seat Lubricating medium between 1 to maintain good lubrication of the outer ring of bearing 2 for a longer period of time, less friction and wear, and improve the working life of bearing 2. In the process of the gradual loss of the lubricating medium, the suction will be formed in the gap between the outer ring of the bearing 2 and the bearing seat 1 due to the pressure difference, forcing the lubricating medium stored in the annular groove 4 to be released gradually to supplement the work. The lack of lubricating medium between the interfaces makes the working interface of the outer ring have a lubricating oil film, so as to achieve the purpose of lubrication. When the shaft 3 rotates, this pressure oil film changes continuously in the radial section of the bearing 2, and finally reaches a dynamic balance, thereby automatically maintaining a certain lubricating medium between the outer ring of the bearing 2 and the surface of the bearing housing 1, and avoiding the friction between the two. Direct contact to achieve the purpose of reducing friction and wear between them, improving bearing life, and thus improving mechanical life.

The utility model advantage is:

(1) Make a continuous lubricating oil film between the lubrication interfaces for a period of time, thereby improving the working life of the equipment; (2) The bearing structure is simple, easy to process, install, maintain and replace; (3) The number of grooves in the outer ring of the bearing The width and width are designed according to the outer diameter of the bearing, the installation position and the requirements of the working parameters; (4) When working, the inner and outer surfaces can generate oil film pressure at the same time, which helps to improve the rotation accuracy of the shaft and the stability of the bearing.

Description of drawings

Fig. 1 is the assembly relationship diagram of the variable diameter floating sliding bearing of the present invention

Fig. 2 is a structural schematic diagram of the variable diameter floating sliding bearing of the present invention

Figure 3 is the left view of Figure 2

Fig. 4 is the assembly relationship diagram of the equal-diameter floating sliding bearing of the present invention

Fig. 5 is a schematic diagram of the structure of the equal-diameter floating sliding bearing of the present invention

Figure 6 is the left view of Figure 5

Detailed ways

A floating sliding bearing with the function of storing lubricating medium for a vertically installed rotating machine, including a shaft 3 of the rotating machine, a bearing seat 1, and a bearing 2, and the inner ring of the bearing 2 adopts a variable diameter (Fig. 1, 2, 3) or equal diameter (accompanying drawing 4,5,6), bearing 2 outer rings then are equal diameters. It is characterized in that an annular circular groove 4 for storing lubricating medium is processed on the outer ring surface of the bearing 2 .

Its working principle is as follows: when the rotating shaft 3 moves, the bearing 2 is driven to rotate relative to each other due to the friction force between the lubricating medium and the surface of the bearing 2 and the shear resistance between the molecules of the lubricating medium. At the same time, due to the particularity of the vertical installation of the bearing 2 and the difficulty of supplementing the lubricating medium, the outer ring of the bearing 2 will gradually lack the lubricating medium on the working interface after a certain period of time, resulting in increased friction and wear, which will seriously affect the bearing 2. Normal operation shortens the working life of the bearing 2, and then affects machinery, such as the life of the roller cone bit.

The utility model is suitable for various steering work equipment.

The influence of the load is related to the speed of the shaft 3, the viscosity of the lubricant and the matching of the gap formed between the bearing 2 and the housing 1.

Claims (4)

1. the vertical rotating machinery of installing comprises axle (3), bearing support (1), the bearing (2) of rotating machinery with containing the floating sliding bearing that stores the lubricant medium function, and it is characterized in that: the design of bearing (2) external diameter surface has ring-type circular groove (4).

2. vertical installation rotating machinery according to claim 1 is with containing the floating sliding bearing that stores the lubricant medium function, and it is characterized in that: bearing (2) is installed on the vertical axle (3).

3. vertical installation rotating machinery according to claim 1 is with containing the floating sliding bearing that stores the lubricant medium function, and it is characterized in that: the diameter of the ring-type circular groove (4) that designs on bearing (2) external diameter is less than the diameter on surface, outer ring.

4. vertical installation rotating machinery according to claim 1 is characterized in that with containing the floating sliding bearing that stores the lubricant medium function: bearing (2) inner ring adopts and becomes diameter or equal diameter.

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