Sealing body structure of axially split pump

Abstract

A sealing body structure of an axially split pump relates to the technical field of water pumps and comprises a pump body and a pump cover fixed with the pump body in an up-down covering mode, a pump cavity is enclosed between the pump body and the pump cover, an impeller is arranged in the pump cavity, the axis of the impeller is fixedly connected with a rotating shaft, and sealing bodies are arranged at the two ends of the pump cavity and are coaxial with the rotating shaft. The sealing body, the pump cover and the pump body are of a split assembly structure. Efficient and stable operation of the pump is achieved, meanwhile, machining, overhauling and maintaining are convenient, the overall performance of the pump is improved, and the service life of the pump is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, specifically to a sealing structure for a split-case pump. Background Technology

[0002] In traditional pump equipment, especially in split-case pump designs, the sealing body is typically cast directly as a single unit with the pump body and cover, lacking a separate sealing body assembly. While this integrated casting method simplifies the assembly process, it introduces numerous inconveniences in manufacturing. Specifically, because the sealing body is not an independent component, a sealing cavity matching the mechanical seal must be directly machined into the pump body and cover. This process is not only technically demanding but also difficult to manufacture, often leading to increased manufacturing costs and reduced production efficiency.

[0003] Furthermore, in traditional integrated casting structures, due to limitations in the casting process, it is usually impossible to cast a baffle structure on the back of the sealing body. As an important fluid guiding and buffering element, the baffle is often overlooked or cannot be implemented in traditional designs. Utility Model Content

[0004] The purpose of this invention is to propose a sealing structure for a split-case pump, in order to solve the shortcomings of traditional split-case pumps in sealing design, which not only increases processing difficulty and manufacturing cost, but also limits the improvement of pump performance and the extension of service life.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A sealing structure for a split-case pump includes a pump body and a pump cover that is fixedly fitted to the pump body from the top and bottom. The pump body and the pump cover enclose a pump cavity, in which an impeller is disposed. The impeller shaft is fixedly connected to a rotating shaft. Sealing bodies are disposed at both ends of the pump cavity and coaxially with the rotating shaft. The sealing bodies are assembled separately from the pump cover and the pump body.

[0007] Furthermore, the sealing body is recessed with several pin holes, and the inner sides of the pump body and pump cover are correspondingly provided with positioning pins that are positioned and matched with the pin holes.

[0008] Furthermore, the sealing body is recessed with a sealing groove, and during assembly, an O-ring is fitted onto the sealing groove.

[0009] Furthermore, a pressure cap is coaxially fixed to the outer side of the sealing body.

[0010] Furthermore, a baffle is integrally provided on the inner side of the sealing body, which is used to convert radially flowing liquid into axial flow.

[0011] Furthermore, the pump body and pump cover are provided with locking slots on both sides to prevent the sealing body from shifting.

[0012] Furthermore, the rotating shaft is rotatably mounted on both sides of the pump body via bearings and bearing sleeves.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model proposes a sealing body structure for a split-case pump. By combining the sealing body, which is assembled separately with the pump body and pump cover, and utilizing the positioning fit of pin holes and locating pins, O-rings to enhance sealing performance, glands to fix the sealing body, baffles to change the liquid flow direction, bayonet to prevent the sealing body from moving, and bearings and bearing sleeves to support the rotation of the shaft, the pump achieves efficient and stable operation. At the same time, it is easy to process, inspect and maintain, thus improving the overall performance and service life of the pump. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the sealing body of this utility model. Detailed Implementation

[0018] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] like Figure 1-2 As shown, a split-case pump sealing structure includes a pump body 1 and a pump cover 5 that is fixedly fitted to the pump body 1. The pump body 1 and the pump cover 5 enclose a pump cavity, in which an impeller 10 is disposed. The shaft of the impeller 10 is fixedly connected to a rotating shaft 7. Sealing bodies 3 are coaxially disposed at both ends of the pump cavity with the rotating shaft 7. The sealing bodies 3 are separately assembled from the pump cover 5 and the pump body 1. The sealing bodies 3 are recessed with a plurality of pin holes 14. The inner sides of the pump body 1 and the pump cover 5 are correspondingly provided with positioning pins 2 that are positioned and engaged with the pin holes 14. The sealing bodies 3 are recessed with a sealing groove 13. During assembly, an O-ring seal 4 is fitted onto the sealing groove 13.

[0023] The sealing body 3 is positioned and engaged with the locating pins 2 inside the pump body 1 and pump cover 5 via the pin hole 14 on it, ensuring the correct position of the sealing body 3 between the pump body 1 and pump cover 5. Then, the O-ring 4 is fitted onto the sealing groove 13 of the sealing body 3 to provide additional sealing effect and prevent liquid leakage in the pump cavity.

[0024] Specifically, as shown in the figure, a pressure cap 6 is coaxially fixed to the outer side of the sealing body 3. The pressure cap 6 is fixedly connected to the pump body 1 or pump cover 5 by bolts or other fasteners, further ensuring the stability and sealing performance of the sealing body 3.

[0025] Specifically, as shown in the figure, a baffle 11 is integrally provided on the inner side of the sealing body 3. The baffle 11 is used to change the radial flow of liquid into axial flow. The function of the baffle is to change the flow pattern of the radially flowing liquid from radial to axial, which guides the liquid and acts as a buffer; at the same time, it makes the fluid flow without rotation, reducing the losses caused by the formation of vortices due to liquid rotation, which helps to improve the efficiency and stability of the pump, reduces the possibility of pump cavitation, and thus further effectively protects the flow-through components and improves the service life of the components.

[0026] Specifically, as shown in the figure, the pump body 1 and the pump cover 5 are provided with slots 12 on both sides to prevent the sealing body 3 from moving.

[0027] Specifically, as shown in the figure, the rotating shaft 7 is rotatably mounted on both sides of the pump body 1 via bearing 8 and bearing sleeve 9.

[0028] The sealing body 3 is cast separately from the pump body 1 and pump cover 5. This split assembly structure allows the three parts to be machined independently, improving processing efficiency and flexibility. Furthermore, when maintenance or replacement of the sealing body is required, only the relevant fasteners need to be removed, greatly simplifying the maintenance process. The O-ring 4 and locating pin 2 work together to ensure a tight connection between the sealing body 3 and the pump body 1 and pump cover 5, effectively preventing leakage of liquid within the pump chamber. The baffle 11 alters the radial flow pattern of the liquid, reducing vortex losses caused by liquid rotation, thereby improving pump efficiency and stability. This design also helps reduce the likelihood of pump cavitation, further protecting flow components and extending their service life. The bayonet 12 ensures that the sealing body 3 does not shift during pump operation, maintaining its stable position and guaranteeing normal pump operation.

[0029] This utility model proposes a sealing body structure for a split-case pump. By combining the sealing body, which is assembled separately with the pump body and pump cover, and utilizing the positioning fit of pin holes and locating pins, O-rings to enhance sealing performance, glands to fix the sealing body, baffles to change the liquid flow direction, bayonet to prevent the sealing body from moving, and bearings and bearing sleeves to support the rotation of the shaft, the pump achieves efficient and stable operation. At the same time, it is easy to process, inspect and maintain, thus improving the overall performance and service life of the pump.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sealing body structure for a split-case pump, characterized in that, The pump includes a pump body and a pump cover that is fixedly fitted to the pump body. The pump body and the pump cover enclose a pump cavity. An impeller is installed in the pump cavity. The impeller shaft is fixedly connected to a rotating shaft. Sealing bodies are installed at both ends of the pump cavity and coaxially with the rotating shaft. The sealing bodies are assembled separately from the pump cover and the pump body. The sealing body is recessed with several pin holes, and the inner sides of the pump body and pump cover are respectively provided with positioning pins that are positioned and matched with the pin holes. The sealing body is recessed with a sealing groove, and an O-ring is fitted onto the sealing groove during assembly. A pressure cap is coaxially fixed to the outer side of the sealing body; A baffle is integrally provided on the inner side of the sealing body, which is used to convert the radially flowing liquid into an axial liquid; The pump body and pump cover are provided with locking slots on both sides to prevent the sealing body from moving. The rotating shaft is rotatably mounted on both sides of the pump body via bearings and bearing sleeves.

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