Split type double-suction impeller structure

Abstract

The utility model designs a split type double-suction impeller structure, which comprises a shaft and an impeller, and is characterized in that the impeller consists of an upper half and a lower half to form a half-split impeller, a key is arranged at the position of the shaft for installing the impeller, external threads are arranged on two outer sides of the key on the shaft, an axial key slot is arranged on the inner side surface of one hub of the two half-split impellers, and the outer threads are arranged on the outer sides of the key on the shaft. The middle planes of the two half-split impellers face each other, the outer side ends of the two half-split impellers are respectively provided with an impeller fixing sleeve sleeved on the shaft, the impeller fixing sleeves are pressed and sleeved on hubs of the half-split impellers, and the outer side ends of the two impeller fixing sleeves are respectively provided with an impeller lock nut screwed on an external thread on the shaft for fastening. The impeller has the advantages that compared with a traditional integral impeller type, the impeller is divided into two half structures and is fixed on the shaft through the impeller fixing sleeve, the impeller lock nut and the key, when the impeller needs to be disassembled and replaced, the half impeller can be disassembled only by loosening the impeller lock nut and the impeller fixing sleeve, and great convenience is achieved.

Description

Technical Field

[0001] The utility model relates to a split double-suction impeller structure and an assembly and fixing method thereof, which includes both the structural form of the double-suction impeller and the fixed connection method between the impeller and a shaft. Background Art

[0002] Double suction pumps have the characteristics of large flow, high efficiency, stable operation, and wide application. However, in certain specific occasions, for example, the flow may change seasonally, requiring variable frequency operation or regular replacement of the impeller; the impeller is seriously damaged and needs to be replaced frequently. Variable frequency operation requires the addition of variable frequency equipment, which not only increases costs, but also adds an unstable factor of variable frequency equipment; due to the structural characteristics of traditional impellers, replacing the impeller requires disassembling and assembling mechanical seals, bearings, sleeves, and sleeve lock nuts (see attached Figure 1 :The traditional double-suction pump impeller structure and fixing method, in the figure, 11 is the bearing, 12 is the mechanical seal, 13 is the impeller, 14 is the shaft, 15 is the sleeve, and 16 is the sleeve lock nut), this will cause damage to the mechanical seal and bearing, increase the maintenance cost and maintenance time, and even due to site conditions, personnel skill level and lack of tools, it will lead to difficulties in disassembly and assembly, and the operation stability of the original equipment cannot be fully reproduced after assembly, which will cause damage to the equipment and affect the normal use of the site. Summary of the invention

[0003] The purpose of the utility model is to solve the problems that the traditional double-suction impeller is inconvenient to disassemble and assemble, the bearing and mechanical seal are easily damaged, the cost and maintenance time are increased, and the on-site use is affected. The utility model provides a split double-suction impeller structure. The utility model designs a split double-suction impeller structure, including a shaft and an impeller, characterized in that the impeller is composed of two halves, the impeller is installed at the shaft with a key, and the two outer sides of the key on the shaft are provided with external threads. An axial keyway is opened on the inner side of the hub of one of the two half-impellers, and the keyway is engaged with the key provided on the shaft. The middle planes of the two half-impellers face each other, and the outer ends of the two half-impellers are each provided with an impeller fixing sleeve mounted on the shaft and pressed on the hub of the half-impeller. The outer ends of the two impeller fixing sleeves are both screwed on the external threads on the shaft to tighten the impeller lock nuts. The split double-suction impeller is made of a complete impeller that has been processed, and the upper and lower halves are made by wire cutting. The advantage of the utility model is that compared with the traditional integral impeller type, the impeller is split into two halves, which are fixed to the shaft by an impeller fixing sleeve, an impeller locking nut and a key. When the impeller needs to be disassembled and replaced, it is only necessary to loosen the impeller locking nut and the impeller fixing sleeve to remove the half impeller, which is quite convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Figure 1 It is a structural schematic diagram of the prior art.

[0005] Figure 2It is a structural schematic diagram of the utility model.

[0006] Figure 3 It is a three-dimensional schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0007] The figure shows a split double-suction impeller structure, including a shaft 1 and an impeller 5, characterized in that the impeller is composed of two halves, a key 4 is provided at the impeller installation position of the shaft, and external threads 6 are provided on both outer sides of the key on the shaft. An axial keyway 7 is provided on the inner side of the hub of one of the two half-impellers, and the keyway is engaged with the key provided on the shaft. The middle planes of the two half-impellers face each other, and the outer ends of the two half-impellers are respectively provided with an impeller fixing sleeve 3 mounted on the shaft and pressed on the hub 8 of the half-impeller. The outer ends of the two impeller fixing sleeves are both tightened with an impeller lock nut 2 screwed on the external thread on the shaft. The split double-suction impeller is made of a complete impeller that has been processed into a structure of upper and lower halves by wire cutting.

[0008] During assembly, the two half impellers are mounted on the shaft through key clamps, the impeller fixing sleeves on both sides are fitted and pressed onto the hubs of the two half impellers, and the impeller lock nuts on both sides are screwed onto the shaft and the impeller fixing sleeves are pressed. During disassembly, first unscrew the impeller lock nuts on both sides away from the impeller, then push the impeller fixing sleeves that are fitted and clamped onto the shaft toward the impeller nut until the hubs of the half impellers are completely exposed, and then remove the half impellers.

[0009] Compared with the traditional integral impeller type, the utility model splits the impeller into two halves. The two halves of the impeller are combined into one by an impeller fixing sleeve and an impeller locking nut, and are fixed to the shaft by the impeller fixing sleeve, the impeller locking nut and a key. Therefore, one key drives the two halves of the combined impeller to rotate. When the impeller needs to be disassembled and replaced, it is only necessary to loosen the impeller locking nut and the impeller fixing sleeve to remove the half impeller, which is quite convenient.

Claims

1. A split double-suction impeller structure, comprising a shaft and an impeller, characterized in that: The impeller is composed of two halves, an upper halves and an lower halves, a key is provided at the impeller mounting position of the shaft, external threads are provided on both outer sides of the key on the shaft, an axial keyway is provided on the inner side surface of the hub of one of the two half impellers, the keyway is engaged with the key provided on the shaft, the middle planes on the inner sides of the two half impellers face each other, the outer ends of the two half impellers are respectively provided with an impeller fixing sleeve mounted on the shaft and pressed onto the hub of the half impeller, and the outer ends of the two impeller fixing sleeves are fastened with impeller lock nuts screwed onto the external threads on the shaft.

2. A split double-suction impeller structure according to claim 1, characterized in that: The two half impellers are made from a complete impeller by wire cutting.

Images