An axially fastened connection structure between an axial flow pump impeller and a guide cap

Abstract

This utility model relates to an axial fastening connection structure between an axial flow pump impeller and a guide cap. The structure includes a guide cap, an impeller, and a screw. The guide cap and impeller are fitted with a stop joint. The impeller is fixed to the pump shaft. The guide cap has a screw hole for mounting the screw, and the pump shaft has an internal threaded hole for mounting the screw. One end of the screw engages with the internal threaded hole of the pump shaft, and the other end passes through the screw hole and is secured by a lock nut. This utility model discloses an axial fastening connection structure between an axial flow pump impeller and a guide cap, achieving a direct connection between the impeller seat and the guide cap through a single axial screw, replacing the traditional circumferential multi-bolt structure. It has the technical advantages of quick assembly and convenient maintenance, and is suitable for high-power axial flow pump units.

Description

Technical Field

[0001] This utility model relates to a connection structure, specifically a structure for axial flow pump impeller and water guide cap that is quick to assemble and disassemble, easy to maintain, and suitable for axial fastening connection of high-power axial flow pump units. Background Technology

[0002] Traditional axial flow pumps typically use multiple sets of circumferentially distributed bolts (e.g., 3-6 bolts) to fix the impeller and guide cap, which has the following drawbacks:

[0003] 1. A large number of bolts leads to low assembly efficiency and makes metal fatigue more likely due to stress concentration;

[0004] 2. Each bolt of the water guide cap has a corresponding cast hole to facilitate bolt disassembly and assembly, but this will create water flow resistance, increase hydraulic loss, and affect pump efficiency.

[0005] 3. Due to the use of multiple sets of bolts, the manufacturing cost is relatively high, and the difficulty of balancing the entire impeller is increased;

[0006] 4. Disassembly and maintenance require removing each bolt individually, resulting in high maintenance costs. Utility Model Content

[0007] To address the aforementioned problems, the main objective of this utility model is to provide a structure for the axial flow pump impeller and guide cap that is quick to assemble and disassemble, easy to maintain, and suitable for axial fastening connection of high-power axial flow pump units.

[0008] This utility model solves the above-mentioned technical problems through the following technical solution: an axial flow pump impeller and a water guide cap axial fastening connection structure, the axial flow pump impeller and water guide cap axial fastening connection structure includes: a water guide cap, an impeller, and a screw, the water guide cap and the impeller are fitted by a stop joint.

[0009] The impeller is fixed on the pump shaft. The water guide cap is provided with a screw hole for mounting the screw. The pump shaft is provided with an internal thread hole for mounting the screw. One end of the screw is screwed into the internal thread hole of the pump shaft, and the other end passes through the screw hole and is fixed by a lock nut.

[0010] In a specific embodiment of this utility model, the water guide cap and the impeller are installed together by means of a stop and screws.

[0011] In a specific embodiment of this utility model, the water guide cap includes a bowl-shaped water guide cap body, and the junction of the water guide cap and the impeller has an inwardly folded edge. The edge is provided with a positioning protrusion stop and a screw hole that cooperate with the impeller.

[0012] In a specific embodiment of this utility model, a spring washer is provided between the locking nut and the water guide cap.

[0013] In a specific embodiment of this utility model, the spring washer is a disc-shaped spring washer.

[0014] In a specific embodiment of this utility model, the screw diameter is 1.2-1.5 times the wall thickness of the water guide cap.

[0015] In a specific embodiment of this utility model, the screw is a double-ended stud.

[0016] The significant advantages of this invention are as follows: The axial fastening connection structure between the impeller and the guide cap of the axial flow pump provided by this invention has the following benefits: improved assembly efficiency (compared to the traditional multi-bolt structure); maintenance requires only the removal of a single nut, reducing assembly and disassembly time by 60%. This invention achieves a direct connection between the impeller seat and the guide cap through a single axial screw, replacing the traditional circumferential multi-bolt structure. This invention has the technical advantages of quick assembly and convenient maintenance, and is suitable for high-power axial flow pump units. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of this utility model.

[0018] The following are the names corresponding to the reference numerals in this utility model:

[0019] In the diagram: pump shaft 1, impeller 2, water guide cap 3, screw 4, spring washer 5, lock nut 6; internal threaded hole 101, screw hole 301. Detailed Implementation

[0020] 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.

[0021] Figure 1 A schematic diagram of the overall structure of this utility model is shown below. Figure 1 As shown: This utility model proposes an axial fastening connection structure between an axial flow pump impeller and a water guide cap. This structure includes a water guide cap 3, an impeller 2, and a screw 4. The water guide cap 3 and the impeller 2 are fitted together via a stop. The impeller 2 is fixed to the pump shaft 1. The water guide cap 3 has a screw hole 301 for mounting the screw 4, and the pump shaft 1 has an internal threaded hole 101 for mounting the screw 4. One end of the screw 4 is screwed into the internal threaded hole 101 of the pump shaft 1, and the other end passes through the screw hole 301 and is fixed by a locking nut 6. The water guide cap 3 and the impeller 2 are installed together via a stop and screw fit. The water guide cap 3 includes a bowl-shaped body. The junction of the water guide cap 3 and the impeller 2 has an inwardly folded edge, on which a positioning protrusion stop and a screw hole are provided for fitting with the impeller 2.

[0022] In the specific implementation process, a spring washer 5 is provided between the locking nut 6 and the water guide cap 3 in this utility model. The spring washer 5 can generally be selected as a disc spring washer.

[0023] In the specific implementation process, the diameter of the screw in this utility model is 1.2-1.5 times the wall thickness of the water guide cap; the screw can generally be selected as a double-ended stud.

[0024] The axial fastening component of this utility model is a screw rod, which passes through the axial through hole of the water guide cap. One end of the screw rod is screwed into the internal threaded hole of the pump shaft, and the other end is fixed by a lock nut.

[0025] The front end face of the water guide cap of this utility model is provided with a positioning step that matches the impeller.

[0026] The anti-loosening structure of this utility model is to add a spring washer between the locking nut and the water guide cap.

[0027] This new invention improves assembly efficiency by more than 40% (compared to traditional multi-bolt structures); during maintenance, only a single nut needs to be removed, reducing disassembly and assembly time by 60%.

[0028] This invention achieves a direct connection between the impeller seat and the guide cap using a single axial screw, replacing the traditional circumferential multi-bolt structure. This invention offers advantages such as quick assembly and convenient maintenance, and is suitable for high-power axial flow pump units.

[0029] 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. An axially fastened connection structure between an axial flow pump impeller and a guide cap, characterized in that: The axial flow pump impeller and guide cap axial fastening connection structure includes: guide cap, impeller, and screw, with the guide cap and impeller fitted by a stop joint; The impeller is fixed on the pump shaft. The water guide cap is provided with a screw hole for mounting the screw. The pump shaft is provided with an internal thread hole for mounting the screw. One end of the screw is screwed into the internal thread hole of the pump shaft, and the other end passes through the screw hole and is fixed by a lock nut.

2. The axial flow pump impeller and guide cap axial fastening connection structure according to claim 1, characterized in that: The water guide cap and impeller are installed together by means of a stop and screws.

3. The axial flow pump impeller and guide cap axial fastening connection structure according to claim 1 or 2, characterized in that: The water guide cap includes a bowl-shaped water guide cap body, and the water guide cap and impeller are joined by an inwardly folded edge. The edge is provided with a positioning protrusion stop and screw holes that cooperate with the impeller.

4. The axial flow pump impeller and guide cap axial fastening connection structure according to claim 1, characterized in that: A spring washer is provided between the locking nut and the water guide cap.

5. The axial flow pump impeller and guide cap axial fastening connection structure according to claim 4, characterized in that: The spring washer is a disc spring washer.

6. The axial flow pump impeller and guide cap axial fastening connection structure according to claim 1, characterized in that: The screw diameter is 1.2-1.5 times the wall thickness of the water guide cap.

7. The axial flow pump impeller and guide cap axial fastening connection structure according to claim 1 or 6, characterized in that: The screw is a double-ended stud.

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