Petrochemical process pump bearing

Abstract

The utility model relates to the technical field of a bearing body of a centrifugal pump for a petrochemical process, in particular to a bearing of a petrochemical process pump, which comprises a movable ring which is tightly held with a main shaft body through a movable ring O-shaped ring and is positioned on the periphery of the main shaft body; the static ring is mounted on the bearing cavity through a positioning step, and a static ring O-shaped ring is arranged at the outer diameter of the static ring and is sealed with the bearing cavity; the bearing body and the bracket are cast into a whole, a whole-circle flange structure is adopted, spigot positioning is omitted, machining procedures are reduced, the rigidity of the bearing body is improved, vibration and stress of a pump set are effectively reduced, meanwhile, it is guaranteed that heat generated by the bearing can be diffused in time, and the structure of the bearing body is optimized and improved; the design that sealing cavities are different in shaft diameter and have the same installation size, quick-wear parts and bearing bodies are universalized is completed, modular design and production of products are achieved, the old-fashioned bearing body structure is changed according to the standard uniformity requirement, reasonable design is conducted, and therefore a series of cost of the technology, machining and maintaining is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pump bearing bodies for petrochemical processes, in particular to a petrochemical process pump bearing. Background Art

[0002] With the development and growth of my country's national economy, the standards have been seriously implemented and implemented by relevant enterprises. We are ready to grasp the connotation and construction of new standardization work, and improve the quality of standardized research and development. Our development goal is to improve quality, continuously optimize the construction of the standard system, and improve the quality of products and services. In order to adapt to the replacement of energy-saving equipment as soon as possible, based on the design project of the constant bottom pump for the distillation unit of Jiangsu Jingong Technology Group Co., Ltd., the bearing body of the petrochemical process pump with BB2 structure in the API610 standard is now designed. Although the performance after design needs to meet user needs, stable operation is the fundamental concern of users. The structural design of the bearing body is one of the most important links to ensure the stable operation of the product, and it is also an important factor to ensure stable operation, which provides basic guarantee for the stable operation of the pump. At present, the structure of the bearing body for the pump is multi-faceted and complex, which makes the product very complicated, and the cost of the old-fashioned bearing body structure process, processing and maintenance is high. For this reason, we propose the bearing of the petrochemical process pump. Utility Model Content

[0003] Aiming at the problems in the prior art, the utility model provides a petrochemical process pump bearing.

[0004] The technical solution adopted by the utility model to solve the technical problem is a petrochemical process pump bearing, including

[0005] The dynamic ring is tightly held with the spindle body through the dynamic ring O-ring and is located outside the spindle body;

[0006] The stationary ring is installed on the bearing cavity by the positioning step, and there is a stationary ring O-ring on the outer diameter to seal with the bearing cavity;

[0007] The lubricating oil catching groove is preset on the inner wall of the stationary ring and is connected to the lubricating oil return port, so that the lubricating oil circulates on both sides of the bearing under the pumping effect of the dynamic ring;

[0008] The lubricating oil return port is preset in the stationary ring and is connected with the lubricating oil capture groove;

[0009] A bearing body is sleeved and installed on the outer periphery of the main shaft;

[0010] Preferably, the outer periphery of the stationary ring is integrally formed with a square shoulder;

[0011] Preferably, a dynamic-static ring interface is provided between the dynamic ring and the static ring;

[0012] Preferably, a foreign matter discharge port is provided on the outer periphery of the static ring;

[0013] Preferably, a special O-ring is installed between the dynamic ring and the static ring.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The technical solution of the present application increases the rigidity of the bearing body and the bracket by casting the bearing body and the bracket into one piece, adopts a full-circle flange structure, eliminates the stopper positioning, reduces the processing steps, and effectively reduces the vibration and stress of the pump group. At the same time, it ensures that the heat generated by the bearing can be dissipated in time, and optimizes and improves the structure of the bearing body, completes the design of different shaft diameters and sealing cavities with the same installation dimensions, wearing parts, and universal bearing bodies, realizes modular design and production of products, and according to the requirements of standardization and uniformity, changes the old bearing body structure and conducts a rational design, thereby reducing a series of costs such as process, processing and maintenance.

[0016] 2. The technical solution of the present application adopts a replaceable bearing isolator for sealing, which effectively keeps the lubricating oil in the bearing chamber and prevents debris from entering the bearing chamber. The isolator is a bearing protection product. It integrates dynamic sealing theory on the basis of ordinary labyrinth bearing seals. During the operation of the bearing, it dynamically balances the pressure inside and outside the cavity, while taking into account spatial isolation to prevent the leakage of lubricating oil and external contaminants from entering the bearing body, thereby effectively extending the bearing life, reducing wear, and avoiding abnormal shutdown.

[0017] 3. The design of the bearing components of the technical solution of this application is fully in line with the API610 standard and the Sinopec material procurement technical standard. The new bearing component structure forms a series of three shaft diameters and formulates a new standard code. The components have high versatility and the proportion of standard parts is as high as 92% or more, which effectively improves the versatility and standardization of parts, reduces procurement costs, shortens delivery cycles, and increases market competitiveness. At the same time, standardized and modular design and production will create prerequisites for improving tooling utilization, improving production efficiency and product quality, and reducing processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the connection structure between the bearing body and the main shaft body of the utility model;

[0020] Figure 2 This is a schematic diagram of the shaft seal structure of the utility model;

[0021] In the figure: 1. Dynamic ring; 2. Static ring; 3. Special O-ring; 4. Dynamic ring O-ring; 5. Static ring O-ring; 6. Foreign matter discharge port; 7. Lubricating oil capture groove; 8. Lubricating oil return port; 9. Square shoulder; 10. Dynamic and static ring interface; 11. Main shaft body; 12. Bearing body. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figure 1-2 , the embodiment of the utility model provides a technical solution: a petrochemical process pump bearing, comprising a moving ring 1, which is tightly held with a main shaft body 11 through a moving ring O-ring 4 and is located at the outer periphery of the main shaft body 11;

[0024] The stationary ring 2 is installed on the bearing cavity by the positioning step, and there is a stationary ring O-ring 5 at the outer diameter to seal with the bearing cavity;

[0025] The lubricating oil catching groove 7 is preset on the inner wall of the stationary ring 2 and is connected to the lubricating oil return port 8, so that the lubricating oil circulates on both sides of the bearing under the pumping effect of the dynamic ring 1;

[0026] The lubricating oil return port 8 is preset in the stationary ring 2 and is connected to the lubricating oil catching groove 7;

[0027] A bearing body 12 is sleeved and installed on the outer periphery of the main shaft body 11;

[0028] When in use, the moving ring 1 is tightly held with the main shaft body 11 by the moving ring O-ring 4, and it rotates with the main shaft body 11. The moving ring O-ring 4 does not produce axial displacement, so it is only a static sealing point, which works efficiently and operates reliably. The static ring 2 is partially installed on the bearing cavity by the positioning step, and the static ring O-ring 5 is provided at the outer diameter to seal with the bearing cavity. A lubricating oil capture groove 7 is specially designed on the static ring 2, and a lubricating oil return channel is designed at the corresponding position, so that the lubricating oil can circulate on both sides of the bearing under the pumping effect of the moving ring 1, so that the bearing body can be lubricated.

[0029] like Figure 2 As shown, the outer periphery of the stationary ring 2 is integrally constructed with a square shoulder 9; a stationary ring interface 10 is provided between the dynamic ring 1 and the stationary ring 2; a foreign matter discharge port 6 is provided on the outer periphery of the stationary ring 2; and a special O-ring 3 is installed between the dynamic ring 1 and the stationary ring 2.

[0030] When in use, the dynamic ring O-ring 4 and the static ring O-ring 5 are made of nitrile rubber, and the special O-ring 3 is a "VBX" special O-ring 3. The square shoulder 9 is convenient for providing a certain limiting performance, so that the static ring 2 is easy to disassemble and assemble, and the foreign matter discharge port 6 is convenient for the discharge of debris generated by the friction between the static ring 2 and the dynamic ring 1.

[0031] The working principle and use process of the utility model are as follows: when the shaft seal structure is installed on the bearing body 12, the moving ring 1 is tightly held with the moving ring O-ring 4 and the main shaft body 11, and it rotates with the main shaft body 11. The moving ring O-ring 4 does not produce axial displacement, so it is only a static sealing point, which works efficiently and operates reliably, and the static ring 2 is partially installed on the bearing cavity by the positioning step, and a static ring O-ring 5 is provided at the outer diameter to seal with the bearing cavity. A lubricating oil catching groove 7 is specially designed on the static ring 2, and a lubricating oil return channel is designed at the corresponding position, so that the lubricating oil can circulate on both sides of the bearing under the pumping effect of the moving ring 1, so that the bearing part in the bearing body 12 is lubricated, thereby effectively extending the bearing life, reducing wear, and avoiding abnormal shutdown. At the same time, since the bearing body and the bracket are cast as one body and a full-circle flange structure is adopted, the stop positioning is cancelled, the processing steps are reduced, the rigidity of the bearing body is increased, and the vibration and stress of the pump group are effectively reduced.

[0032] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. Petrochemical process pump bearings, characterized in that: include The moving ring (1) is tightly held by the main shaft body (11) through the moving ring O-ring (4) and is located on the outer periphery of the main shaft body (11); The stationary ring (2) is mounted on the bearing cavity by the positioning step, and has a stationary ring O-ring (5) at the outer diameter to seal with the bearing cavity; The lubricating oil catching groove (7) is preset on the inner wall of the stationary ring (2) and is connected to the lubricating oil return port (8), so that the lubricating oil circulates on both sides of the bearing under the pumping effect of the dynamic ring (1); The lubricating oil return port (8) is preset in the stationary ring (2) and is connected to the lubricating oil catching groove (7); A bearing body (12) is sleeved and installed on the outer periphery of the main shaft body (11).

2. The petrochemical process pump bearing according to claim 1, characterized in that: The outer circumference of the stationary ring (2) is integrally formed with a square shoulder (9).

3. The petrochemical process pump bearing according to claim 1, characterized in that: A dynamic and static ring interface (10) is provided between the dynamic ring (1) and the static ring (2).

4. The petrochemical process pump bearing according to claim 1, characterized in that: A foreign matter discharge port (6) is arranged on the outer periphery of the stationary ring (2).

5. The petrochemical process pump bearing according to claim 1, characterized in that: A special O-ring (3) is installed between the dynamic ring (1) and the static ring (2).

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