O-shaped ring sealing structure of axially split pump

Abstract

The utility model relates to an axially split pump O-shaped ring sealing structure which comprises a pump body O-shaped ring, a mechanical sealing O-shaped ring and a mechanical seal, a high-pressure area and a low-pressure area are arranged in a pump body, the pump body O-shaped ring is arranged between the high-pressure area and the low-pressure area, and the mechanical sealing O-shaped ring is arranged at the position matched with the mechanical seal. During assembly, the pump body and the pump cover are connected through a fastening bolt between the pump body and the pump cover, and the bolt tightly presses the O-shaped ring of the pump body in the horizontal direction. At the position matched with the mechanical seal, the O-shaped ring groove of the pump body rotates by 90 degrees and is changed into the direction perpendicular to the shaft, and then when the mechanical seal is assembled, the O-shaped ring of the mechanical seal is in the vertical direction at the middle opening face position, and the O-shaped ring of the pump body is in the horizontal direction at the position matched with the mechanical seal at the middle opening face position; and the mechanical sealing O-shaped ring and the pump body O-shaped ring are crossed. According to the utility model, the middle-open type pump can be designed to have higher pressure and temperature, and the reliability of equipment operation is ensured.

Description

Technical Field

[0001] This utility model relates to an O-ring sealing structure, specifically a split-case pump O-ring sealing structure that is simple in structure, easy to install, can effectively seal, and can be used in high temperature and high pressure conditions, with stable and leak-free operation. Background Technology

[0002] Traditional split-case pumps are suitable for media including clean water, sewage, corrosive liquids, and chemical media. Due to their relatively simple structure and convenient maintenance, the entire rotor can be removed simply by opening the pump cover. Therefore, they are widely used in applications involving the transportation of large quantities of liquids such as water and oil. However, traditional split-case pumps also have limitations. Due to their large sealing area, sealing the split surface has always been a challenge under high temperature and high pressure conditions.

[0003] Conventional split-case pump seals use gaskets, which have several drawbacks. For example, the compression of gaskets made of different materials cannot be precisely controlled, leading to inconsistent internal dimensional fits after pump body and cover assembly. Furthermore, insufficient preload in the high-pressure and low-pressure areas of the pump body and cover can cause gasket failure, resulting in significant internal flow loss and erosion of the pump body and cover, causing damage. Gasket seals require extremely high machining precision in the split-case design, especially for large split-case pumps. O-ring seals, on the other hand, provide metal-to-metal contact between the pump body and cover. The O-ring's elasticity and compressibility allow for some metal deformation. While some manufacturers use O-ring seals in existing split-case pumps, the O-ring is not a complete ring during sealing, leading to breakage at the mechanical seal location and making sealing difficult between the mechanical seal and the pump body / cover. To address this issue, a special split-case O-ring seal structure was designed, providing effective sealing, suitable for high-temperature and high-pressure conditions, and ensuring stable, leak-free operation. Utility Model Content

[0004] To address the aforementioned problems, the main objective of this utility model is to provide a split-case pump O-ring sealing structure that is simple in structure, easy to install, effectively seals, and can be used in high-temperature and high-pressure conditions, ensuring stability and no leakage.

[0005] The present invention solves the above-mentioned technical problems through the following solution: a split-case pump O-ring sealing structure, the split-case pump sealing structure comprising: a pump body O-ring (2), a mechanical seal O-ring (3), and a mechanical seal (4) located on the pump body (1), the pump body and the pump cover are fastened with vertical bolts, and the mechanical seal is fastened with horizontal bolts to the pump body and the pump cover; the pump body (1) is provided with a high-pressure area and a low-pressure area, and the pump body O-ring (2) is provided between the high-pressure area and the low-pressure area, and the mechanical seal O-ring (3) is provided at the position that cooperates with the mechanical seal.

[0006] In a specific embodiment of this utility model, during assembly, the pump body and the pump cover are connected by fastening bolts (7) between the pump body and the pump cover, and the fastening bolts (7) between the pump body and the pump cover press the pump body O-ring (2) in the horizontal direction.

[0007] In a specific embodiment of this utility model, at the position where it mates with the mechanical seal (4), the O-ring groove of the pump body (1) is rotated 90° to become perpendicular to the shaft. When the mechanical seal (4) is then assembled, the mechanical seal O-ring (3) is in the vertical direction at the open face position, and the pump body O-ring (2) is in the horizontal direction at the position where it mates with the mechanical seal (4) at the open face. After the fastening bolts of the mechanical seal are tightened, the mechanical seal O-ring (3) and the pump body O-ring (2) intersect in a cross shape.

[0008] The positive and progressive effects of this utility model are as follows: Compared with common similar technologies, the O-ring sealing structure for split-case pumps provided by this utility model breaks through the limitations of traditional gasket sealing, allowing split-case pumps to be designed for higher pressure and temperature, thus ensuring the reliability of equipment operation. Attached Figure Description

[0009] Figure 1 This is an overall cross-sectional view of the split-case pump in this utility model.

[0010] Figure 2 This is a schematic diagram of the O-ring groove in the pump body of this utility model.

[0011] Figure 3 This is a schematic diagram of the sealing structure in this utility model.

[0012] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0013] The following are the names corresponding to the reference numerals in this utility model:

[0014] Pump body (1), pump body O-ring (2), mechanical seal O-ring (3), mechanical seal (4), shaft (5), mechanical seal fastening bolt (6), and fastening bolt between pump body and pump cover (7). Detailed Implementation

[0015] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0016] Figure 1 This is an overall cross-sectional view of the split-case pump in this utility model. Figure 2 This is a schematic diagram of the O-ring slot in the pump body of this utility model. Figure 3 This is a schematic diagram of the sealing structure in this utility model, as shown below. Figure 1-3As shown: The split-case pump sealing structure is located between the low-pressure zone and the high-pressure zone of the pump body. The split-case pump sealing structure includes: a pump body O-ring 2, a mechanical seal O-ring 3, and a mechanical seal 4 located on the pump body 1. The pump body and the pump cover are fastened with vertical bolts, and the mechanical seal is fastened with horizontal bolts to the pump body and the pump cover. The pump body 1 is equipped with a pump body O-ring 2 located between the high-pressure zone and the low-pressure zone, which can effectively isolate backflow inside the pump. The mechanical seal O-ring 3 is located at the position where it mates with the mechanical seal. During use, the pump body O-ring 2 and the mechanical seal O-ring form a cross intersection.

[0017] During assembly, the pump body and pump cover are connected by fastening bolts 7 between the pump body and pump cover. The pump body O-ring 2 is pressed horizontally to create a seal. At the position where it mates with the mechanical seal 4, the O-ring groove in the pump body 1 (e.g., Figure 4 As shown, when the mechanical seal 4 is assembled, the mechanical seal O-ring 3 is vertical in the open face position, and the pump body O-ring 2 is horizontal in the open face position where it mates with the mechanical seal 4. After the fastening bolts of the mechanical seal are tightened, the mechanical seal O-ring 3 and the pump body O-ring 2 intersect in a cross shape. Since there is an O-ring groove of the pump body at point A, the pump body O-ring and the mechanical seal O-ring will be in close contact, forming a contact seal and completely isolating the medium from flowing out.

[0018] This utility model patent provides a split-case O-ring seal for a split-case pump, which breaks through the limitations of traditional gasket sealing and allows the split-case pump to be designed for higher pressure and temperature, ensuring the reliability of equipment operation.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A split-case pump O-ring seal structure, characterized in that: The split-case pump O-ring sealing structure includes: a pump body O-ring (2), a mechanical seal O-ring (3), and a mechanical seal (4) located on the pump body (1). The pump body and the pump cover are fastened with vertical bolts, and the mechanical seal is fastened with horizontal bolts to the pump body and the pump cover. The pump body (1) is provided with a pump body O-ring (2) in the high-pressure area and a low-pressure area, and a mechanical seal O-ring (3) is provided at the position where it mates with the mechanical seal.

2. The split-case pump O-ring seal structure according to claim 1, characterized in that: During assembly, the pump body and the pump cover are connected by fastening bolts (7) between the pump body and the pump cover. The fastening bolts (7) between the pump body and the pump cover press the pump body O-ring (2) in the horizontal direction.

3. The split-case pump O-ring seal structure according to claim 2, characterized in that: At the position where it mates with the mechanical seal (4), the O-ring groove of the pump body (1) is rotated 90° to become perpendicular to the shaft. When the mechanical seal (4) is assembled, the mechanical seal O-ring (3) is vertical when it is in the open face position, and the pump body O-ring (2) is horizontal when it mates with the mechanical seal (4) at the open face position. After the fastening bolts of the mechanical seal are tightened, the mechanical seal O-ring (3) and the pump body O-ring (2) intersect in a cross shape.

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