Novel connecting structure for blades and hub of axial flow pump

Abstract

The utility model relates to a novel connecting structure of a blade and a hub of an axial flow pump, which comprises the blade, the hub and a locking device, and the blade and the hub are fixedly connected together through a pair of locking nuts. Each blade comprises a blade body, a body connecting block and a body connecting rod; the hub comprises a hub body, a body concave platform and a body through hole; the body concave platform is formed in the hub body, and the body through hole is formed in the body concave platform; the body connecting block is installed in a body concave table of the hub, the body connecting rod is installed in a body through hole of the hub, the body connecting block is a spherical surface, the body concave table and the body connecting block are connected to form a concave table matched with the spherical surface, and the body concave table and the body connecting block are combined to form a complete spherical surface. According to the utility model, the spherical surface of the blade shaft does not need to be punched, so that the integrity of the spherical surface and the coherence and smoothness of the water flow state are ensured, and the impeller efficiency can be improved; the strength of the blade shaft is ensured; the fine threads are adopted, the locking effect is better than that of the coarse threads, and the effect of a pair of locking nuts is better than that of a single locking nut.

Description

Technical Field

[0001] This utility model relates to a connection structure between a blade and a hub, specifically a novel connection structure between an axial flow pump blade and a hub that ensures the integrity of the spherical surface, the continuity and smoothness of the water flow, improves impeller efficiency, ensures the strength of the blade shaft, and provides good fixing effect. Background Technology

[0002] Axial flow pumps are widely used in municipal engineering, sewage treatment, large-scale water conservancy projects, river management, and farmland irrigation. The impeller is the core component of an axial flow pump; the rotation of the blades in the impeller lifts water to the required head. In axial flow pumps, because the blades need to adjust their relative angle with the hub according to different flow rates, the blades cannot be cast as a single piece with the hub. They are designed as two separate parts and need to be fastened together by connectors.

[0003] First, let me briefly introduce the blade structure of axial flow pumps commonly used in existing technologies. Figure 1 This is a schematic diagram of a commonly used blade structure. Figure 2 This is a schematic diagram of a commonly used wheel hub (the four screw holes are not shown). Figure 3 This is a schematic diagram (two-dimensional diagram) of a common blade-hub connection method. Figure 4 This is a structural diagram (3D model) of a common blade-hub connection method, such as... Figure 1-4 As shown: The lower part of blade 1' is the blade shaft, and the connecting part between them is spherical. Screw holes for mounting screws are drilled on the spherical surface. The surface of hub 3' is also spherical, and hub 3' has a recessed platform and a through hole. For details on the connection between the blade and the hub, see [link to details]. Figure 3 The blade shaft at the bottom of blade 1' is installed into the hub recess, and the spherical surface of the blade shaft fits into the spherical surface of the hub. There are 4 internal hex bolts 2.

[0004] After the blade shaft of blade 1' is installed into the recess of hub 3', the blade and hub are fixed together by four hex socket screws 2' and a connecting plate 4'.

[0005] from Figure 3 and Figure 4 As can be seen, installing screws requires drilling holes in the spherical surface of the blade shaft; installing four screws requires drilling four holes in the spherical surface. This leads to two problems:

[0006] 1. Without drilling, the spherical surfaces of the blade shaft and the hub are perfectly aligned, allowing water to flow smoothly over them. However, drilling disrupts the spherical surface, affecting the flow pattern as the water passes over it, because the hole is close to the blade, directly impacting blade efficiency.

[0007] 2. The blade shaft was weakened after four holes were drilled. Utility Model Content

[0008] To address the aforementioned problems, the main objective of this invention is to provide a novel connection structure between the blades and hub of an axial flow pump that ensures the integrity of the spherical surface, the continuity and smoothness of the water flow, improves impeller efficiency, and guarantees the strength and fixing effect of the blade shaft.

[0009] The present invention solves the above-mentioned technical problems through the following solution: a novel connection structure between an axial flow pump blade and a hub, the novel connection structure between the axial flow pump blade and the hub includes: blade, hub, and locking device, wherein the blade and the hub are fixedly connected together by the locking device.

[0010] The blade includes a blade body, a body connecting block, and a body connecting rod; the body connecting block is located between the blade body and the body connecting rod.

[0011] The wheel hub includes a wheel hub body, a body recess, and a body through hole; the body recess is located inside the wheel hub body, and the body through hole is located inside the body recess.

[0012] The main body connecting block is installed into the main body recess of the wheel hub, and the main body connecting rod is installed into the main body through hole of the wheel hub. The main body connecting block is spherical, and the main body recess is connected to the main body connecting block to form a recess that fits the spherical surface. After the two are combined, they form a complete spherical surface.

[0013] In a specific embodiment of this utility model, the locking device is a pair of locking nuts.

[0014] In a specific embodiment of this utility model, a locking nut is fitted onto the main body connecting rod, and a washer is fixedly provided between the locking nut and the hub body of the wheel hub.

[0015] In a specific embodiment of this utility model, the main connecting rod is a cylinder with fine thread.

[0016] In a specific embodiment of this utility model, the entire blade is integrally formed.

[0017] In a specific embodiment of this utility model, the entire wheel hub is integrally formed.

[0018] The positive and progressive effects of this utility model are as follows: Compared with common similar technologies, the novel connection structure between the axial flow pump blade and hub provided by this utility model does not require drilling holes on the spherical surface of the blade shaft, ensuring the integrity of the spherical surface, the continuity and smoothness of the water flow, and improving the impeller efficiency; the new connection method does not require drilling holes on the spherical surface of the blade shaft, ensuring the strength of the blade shaft; the new connection method uses fine thread, which has a better locking effect than coarse thread, and a pair of locking nuts is more effective than a single locking nut. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a commonly used blade.

[0020] Figure 2 This is a schematic diagram of a common wheel hub structure (the four screw holes are not shown).

[0021] Figure 3 This is a schematic diagram (two-dimensional diagram) of the common connection method between blades and hubs.

[0022] Figure 4 This is a structural diagram (3D view) of a common method for connecting blades and hubs.

[0023] Figure 5 This is a structural schematic diagram (two-dimensional diagram) of the connection method between the blade and the hub in this utility model.

[0024] Figure 6 This is a structural schematic diagram (3D view) of the connection method between the blade and the hub in this utility model.

[0025] Figure 7 This is a schematic diagram of the blade structure in this utility model.

[0026] The following are the names corresponding to the reference numerals in this utility model:

[0027] Figure 1-4 In the middle: blade 1', screw 2', hub 3', connecting plate 4'.

[0028] Figure 5-7 In the middle: blade 1, hub 2, gasket 3, locking device 4; blade body 101, body connecting block 102, body connecting rod 103; hub body 201, body recess 202, body through hole 203. Detailed Implementation

[0029] 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.

[0030] Figure 5 This is a structural schematic diagram (two-dimensional view) of the connection method between the blade and the hub in this utility model. Figure 6 This is a structural schematic diagram (3D view) of the connection method between the blade and the hub in this utility model. Figure 7 This is a schematic diagram of the blade structure in this utility model. As shown in the figure above: This utility model proposes a novel connection structure between an axial flow pump blade and a hub. The novel connection structure between the axial flow pump blade and the hub includes: a blade 1, a hub 2, and a locking device 3. The blade 1 and the hub 2 are fixedly connected together by the locking device 4.

[0031] The blade 1 in this utility model includes: blade body 101, body connecting block 102, and body connecting rod 103; the body connecting block 102 is located between the blade body 101 and the body connecting rod 103.

[0032] The wheel hub 2 of this utility model includes: a wheel hub body 201, a body recess 202, and a body through hole 203; the body recess 202 is opened inside the wheel hub body 201, and the body through hole 203 is located inside the body recess 202.

[0033] The main body connecting block 102 is installed into the main body recess 202 of the hub 2, and the main body connecting rod 103 is installed into the main body through hole 203 of the hub 2. The main body connecting block 102 is spherical, and the main body recess 202 and the main body connecting block 102 are connected to form a recess that fits the spherical surface. After the two are combined, they form a complete spherical surface.

[0034] In the specific implementation process, the locking device 4 in this utility model is a pair of locking nuts.

[0035] A locking nut is fitted onto the main body connecting rod 103, and a washer 3 is fixedly installed between the locking nut and the wheel hub body 201 of the wheel hub 2.

[0036] The entire blade 1 of this utility model is integrally formed, and the hub 2 has a recessed platform and a through hole, and the entire hub 2 is integrally formed.

[0037] The blade body 101 of this utility model has a complete spherical shaft without drilling, and the lower body connecting rod 103 is a cylinder with fine thread machined on the lower part of the cylinder.

[0038] Compared with the original blade structure, the blade in this embodiment does not have screw holes drilled in the spherical part of the blade shaft, and fine threads are machined on the lower cylinder for tightening the lock nut.

[0039] like Figure 5 and 6 As shown, the blade shaft of blade 1 is installed into the recess of hub 2. The spherical surface of the blade shaft fits into the spherical surface of the hub. The lower part of the blade shaft passes through a through hole, and a washer 3 is placed on it. Then, a pair of lock nuts 4 are used to tightly lock the blade to the hub. No holes are drilled on the blade shaft to ensure the integrity of the entire spherical surface, allowing water to flow smoothly, improving impeller efficiency, and ensuring the strength of the blade shaft. Compared with coarse threads, fine threads have a better locking effect. Therefore, the lower part of the blade shaft in this embodiment is machined with fine threads, and a pair of lock nuts with fine threads are used to match it. Compared with a single lock nut, the locking effect is better.

[0040] The connection method of this invention does not require drilling holes on the spherical surface of the blade shaft, thus ensuring the integrity of the spherical surface, the continuity and smoothness of the water flow, and improving the impeller efficiency.

[0041] The connection method of this utility model adopts fine thread, which has a better locking effect than coarse thread, and a pair of locking nuts is more effective than a single locking nut.

[0042] This invention features a more efficient impeller, stronger blade shafts, and a better locking effect between the blades and the hub.

[0043] 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 novel connection structure between the blades and hub of an axial flow pump, characterized in that: The novel connection structure between the axial flow pump blade and the hub includes: blade (1), hub (2), and locking device (4), wherein the blade (1) and hub (2) are fixedly connected together by the locking device (4); The blade (1) includes: a blade body (101), a body connecting block (102), and a body connecting rod (103); the body connecting block (102) is located between the blade body (101) and the body connecting rod (103); The hub (2) includes: hub body (201), body recess (202), and body through hole (203); the body recess (202) is opened in the hub body (201), and the body through hole (203) is located in the body recess (202); The main body connecting block (102) is installed into the main body recess (202) of the hub (2), and the main body connecting rod (103) is installed into the main body through hole (203) of the hub (2). The main body connecting block (102) is a spherical surface, and the main body recess (202) and the main body connecting block (102) are connected to form a recess that fits the spherical surface. After the two are combined, they form a complete spherical surface. The locking device (4) is a pair of locking nuts; A locking nut is fitted onto the main body connecting rod (103), and a washer (3) is fixedly provided between the locking nut and the hub body (201) of the hub (2). The main connecting rod is a cylinder with fine threads. The entire blade (1) is molded as a single piece; The entire wheel hub (2) is integrally formed.

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