Mounting structure for wear ring of first-stage double-suction shell

Abstract

The utility model discloses a first-stage double-suction shell wear ring installation structure which comprises a pump body, a main shaft, a suction box body, a first cover and a first-stage impeller, the first cover is packaged in a left opening of the pump body, the suction box body is pressed in the pump body, the impeller is arranged in the suction box body in a matched mode and is in transmission connection with the main shaft, and the corresponding main shaft penetrates through the first cover and the suction box body and is in transmission connection with the first-stage impeller. The centrifugal pump is characterized in that a cover plate is integrated on the inner side of the first cover, a first-stage front pump body wear ring is installed on the cover plate, a first-stage rear pump body wear ring is installed on the suction box, a first-stage front impeller wear ring and a first-stage rear impeller wear ring are installed on the first-stage impeller, the first-stage front pump body wear ring is sleeved on the first-stage front impeller wear ring in a matched mode, and the first-stage rear impeller wear ring is sleeved on the first-stage rear pump body wear ring in a matched mode. The first-stage rear pump body wear ring is arranged on the first-stage rear impeller wear ring in a matched and sleeved mode. The first-stage double-suction impeller is easy to machine and convenient to install, the number of installed parts can be reduced, the suction performance can be improved, the pump is easy to disassemble and assemble, and the first-stage double-suction impeller is particularly suitable for being used in a multi-stage pump with the first-stage double-suction impeller.

Description

Technical Field

[0001] This utility model relates to an improved invention of a primary double-suction pump, and more particularly to an improved invention of a primary double-suction housing port ring mounting structure. Background Technology

[0002] Double-suction pumps are widely used in user installations with low net positive suction head (NPSH) to prevent vaporization of the inlet medium. Because the impeller outer diameter is much larger than the inlet ring diameter, normal installation involves covering the impeller with a cover plate after installation, then securing the cover plate to the suction chamber with a ring of screws. Additionally, some guide plates need to be welded onto the cover plate. This method adds several components, increases the number of machining steps, and complicates disassembly and installation. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a first-stage double suction shell inlet ring mounting structure that is easy to disassemble and simplify the components.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: The first-stage double-suction housing inlet ring mounting structure includes a pump body, a main shaft, a suction chamber, a first cover, and a first-stage impeller. The first cover is encapsulated in the left opening of the pump body, the suction chamber is press-fitted into the pump body, and the impeller is disposed within the suction chamber and drivenly connected to the main shaft. The corresponding main shaft passes through the first cover and the suction chamber. The first-stage impeller is characterized by: a cover plate integrated inside the first cover, a first-stage front pump body inlet ring mounted on the cover plate, a first-stage rear pump body inlet ring mounted on the suction chamber, a first-stage front impeller inlet ring and a first-stage rear impeller inlet ring mounted on the first-stage impeller, the first-stage front pump body inlet ring being fitted onto the first-stage front impeller inlet ring, and the first-stage rear pump body inlet ring being fitted onto the first-stage rear impeller inlet ring.

[0005] The diameter D1 of the inlet ring of the first-stage pump body is slightly larger than the diameter D2 of the inlet ring of the first-stage pump body.

[0006] The interior of the intake chamber is provided with several first guide plates distributed vertically; between the head cover and the cover plate, there are several second guide plates distributed vertically, and the first guide plates and the second guide plates are arranged symmetrically.

[0007] The first-stage front pump body inlet ring and the first-stage rear pump body inlet ring are spot-welded to the cover plate and the suction box body, respectively. The first-stage front impeller inlet ring and the first-stage rear impeller inlet ring are spot-welded to the first-stage impeller, respectively.

[0008] The beneficial effects of this utility model are: an improved first-stage double-suction housing inlet ring mounting structure, which is easy to assemble and disassemble: the cover plate for mounting the first-stage front impeller inlet ring is integrated into the first cover, reducing the number of parts to be disassembled and assembled; the structure has stable suction performance: the impeller has symmetrical structures on both sides, and the suction box and the guide plate at the first cover are symmetrically designed to ensure balanced suction performance on both sides; the structure is stable in use: the diameter of the inlet ring on the left side of the impeller is slightly larger, creating a slight axial force to the left, preventing the impeller from moving to the right, and a circular retaining ring is designed on the left side of the impeller to prevent movement to the left; the structure has a wide range of applications: this structure can be used for pumps with first-stage double suction, meeting the usage requirements. Attached Figure Description

[0009] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the inhalation chamber of this utility model.

[0012] Figure 3 This utility model Figure 2 BB cross-sectional view.

[0013] Figure 4 This is a schematic diagram of the top cover of this utility model.

[0014] Figure 5 This utility model Figure 4 AA sectional view. Detailed Implementation

[0015] The accompanying drawings illustrate the structure of this utility model, and further details will be described below with reference to the drawings. In this embodiment, see the attached drawings. Figure 1-5 The first-stage double-suction housing inlet ring mounting structure includes a pump body 8, a main shaft 1, a suction box 7, a first cover 3, and a first-stage impeller 6. The first cover 3 is encapsulated in the left opening of the pump body 8. The suction box 7 is press-fitted into the pump body 8. The impeller is disposed in the suction box 7 and is drivenly connected to the main shaft 1. The impeller rotates together with the main shaft 1 via a flat key 12, and the left side of the impeller is fixed by an impeller retainer 11 to prevent the impeller from moving axially to the left. Correspondingly, the main shaft 1 passes through the first cover 3 and the suction box 7, and the first cover 3 and the main shaft... A mechanical seal 2 is provided between the main shaft and the suction box 7. A sealing ring is provided between the main shaft and the suction box 7. A cover plate 13 is integrated on the inner side of the first cover 3. A first-stage front pump body inlet ring 5 is installed on the cover plate 13. A first-stage rear pump body inlet ring 9 is installed on the suction box 7. A first-stage front impeller inlet ring 4 and a first-stage rear impeller inlet ring 10 are installed on the first-stage impeller 6. The first-stage front pump body inlet ring 5 is fitted onto the first-stage front impeller inlet ring 4, and the first-stage rear pump body inlet ring 9 is fitted onto the first-stage rear impeller inlet ring 10.

[0016] This utility model features a cover plate 13 on the first cover 3 for mounting the first-stage front pump body inlet ring 5. The first cover 3 is integrally cast without additional welding or assembly steps. After normal machining, it can be installed in the left opening of the pump body 8, completing the connection between the first-stage front pump body inlet ring 5 and the first-stage front impeller inlet ring 4. It features easy disassembly and assembly, optimized fluid dynamics performance, and ultimately achieves efficient, stable, and low-noise operation of the pump.

[0017] As a further improved implementation, the diameter D1 of the first-stage front pump body inlet ring 5 is slightly larger than the diameter D2 of the first-stage rear pump body inlet ring 9, so that the axial force on the impeller during operation is directed to the left, preventing the impeller from moving to the right.

[0018] As a further improved specific implementation, the inside of the suction box 7 is provided with a plurality of vertically distributed first guide plates 14 to optimize the inlet medium flow state and ensure that the medium enters the impeller smoothly; between the first cover 3 and the cover plate 13, there are a plurality of vertically distributed second guide plates 15, the first guide plates 14 and the second guide plates 15 are symmetrically arranged to balance the medium state on both sides of the first impeller 6.

[0019] As a further improved specific implementation, the first-stage front pump body inlet ring 5 and the first-stage rear pump body inlet ring 9 are spot welded to the cover plate 13 and the suction box 7, respectively, and the first-stage front impeller inlet ring 4 and the first-stage rear impeller inlet ring 10 are spot welded to the first-stage impeller 6, respectively.

[0020] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A first-stage double-suction housing inlet ring mounting structure, comprising a pump body, a main shaft, a suction chamber, a first cover, and a first-stage impeller, wherein the first cover is encapsulated in the left opening of the pump body, the suction chamber is press-fitted into the pump body, the impeller is disposed within the suction chamber and is drivenly connected to the main shaft, and the corresponding main shaft passes through the first cover and the suction chamber, characterized in that: The inner side of the first cover is integrated with a cover plate, and a first-stage front pump body inlet ring is installed on the cover plate. A first-stage rear pump body inlet ring is installed on the suction box. A first-stage front impeller inlet ring and a first-stage rear impeller inlet ring are installed on the first-stage impeller. The first-stage front pump body inlet ring is fitted onto the first-stage front impeller inlet ring, and the first-stage rear pump body inlet ring is fitted onto the first-stage rear impeller inlet ring.

2. The first-stage double-suction housing inlet ring mounting structure as described in claim 1, characterized in that: The diameter D1 of the inlet ring of the first-stage pump body is slightly larger than the diameter D2 of the inlet ring of the first-stage pump body.

3. The first-stage double-suction housing inlet ring mounting structure as described in claim 1, characterized in that: The interior of the intake chamber is provided with several first guide plates distributed vertically; between the head cover and the cover plate, there are several second guide plates distributed vertically, and the first guide plates and the second guide plates are arranged symmetrically.

4. The first-stage double-suction housing inlet ring mounting structure as described in claim 1, characterized in that: The first-stage front pump body inlet ring and the first-stage rear pump body inlet ring are spot-welded to the cover plate and the suction box body, respectively. The first-stage front impeller inlet ring and the first-stage rear impeller inlet ring are spot-welded to the first-stage impeller, respectively.

Images