CN-224200876-U - First-stage double-suction shell mouth ring mounting structure

CN224200876UCN 224200876 UCN224200876 UCN 224200876UCN-224200876-U

Abstract

The utility model discloses a first-stage double-suction casing mouth ring mounting structure which comprises a pump body, a main shaft, a suction box body, a head cover and a first-stage impeller, wherein the head cover is packaged on 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 and is in transmission connection with the main shaft, the corresponding main shaft penetrates through the head cover and the suction box body. The utility model has simple processing and convenient installation, can reduce the number of installed parts and improve the suction performance, so that the pump is easy to disassemble and assemble, and is particularly suitable for the multistage pump with the first-stage double-suction impeller.

Inventors

JIN LIFEI
CAI WANG
XU QINWEI
Yu Feiteng
CHEN YUN
Zou Wangyin
TANG SHUAI
CHEN XIAOYU

Assignees

浙江科尔泵业股份有限公司

Dates

Publication Date: 20260505
Application Date: 20250526

Claims (4)

1. The first-stage double-suction casing mouth ring mounting structure comprises a pump body, a main shaft, a suction box body, a first cover and a first-stage impeller, wherein the first cover is packaged on 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 and is connected with the main shaft in a transmission manner, and the corresponding main shaft penetrates through the first cover and the suction box body.
2. The first-stage double-suction casing collar mounting structure of claim 1, wherein the first-stage front pump body collar diameter D1 is slightly larger than the first-stage rear pump body collar diameter D2.
3. The first-stage double-suction shell mouth ring mounting structure of claim 1, wherein a plurality of first guide plates distributed up and down are arranged in the suction box body, a plurality of second guide plates distributed up and down are arranged between the head cover and the cover plate, and the first guide plates and the second guide plates are symmetrically arranged.
4. The first-stage double-suction casing mouth ring mounting structure of claim 1, wherein the first-stage front pump body mouth ring and the first-stage rear pump body mouth ring are respectively connected with the cover plate and the suction box body through spot welding, and the first-stage front impeller mouth ring and the first-stage rear impeller mouth ring are respectively connected with the first-stage impeller through spot welding.

Description

First-stage double-suction shell mouth ring mounting structure Technical Field The utility model relates to an improved utility model of a first-stage double-suction pump, in particular to an improved utility model of a first-stage double-suction shell mouth ring mounting structure. Background When the cavitation allowance of the user device is low, the first-stage double-suction pump is widely applied to preventing the medium at the inlet of the pump from vaporizing, and as the outer diameter of the impeller is quite large relative to the diameter of the mouth ring, the impeller is normally installed and then covered by a cover plate, the cover plate is fixed on the suction box body by a circle of screws, and a plurality of guide plates are welded on the cover plate. In this way, a plurality of parts are added, the parts processing procedures are more, and the disassembly and the assembly are complex. Disclosure of utility model The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing a first-stage double-suction shell mouth ring mounting structure which is convenient to assemble and disassemble and simplifies components. The utility model aims to solve the technical problems, and the technical scheme is that the first-stage double-suction casing mouth ring mounting structure comprises a pump body, a main shaft, a suction box body, a first cover and a first-stage impeller, wherein the first cover is packaged on 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 and is in transmission connection with the main shaft, the corresponding main shaft penetrates through the first cover and the suction box body, and the first-stage double-suction casing mouth ring mounting structure is characterized in that a cover plate is integrated on the inner side of the first cover, a first-stage front pump mouth ring is mounted on the cover plate, a first-stage rear pump mouth ring is mounted on the suction box body, the first-stage front pump mouth ring and the first-stage rear impeller mouth ring are matched and sleeved on the first-stage front impeller mouth ring, and the first-stage rear pump mouth ring is matched and sleeved on the first-stage rear impeller mouth ring. The diameter D1 of the front pump body mouth ring of the first stage is slightly larger than the diameter D2 of the rear pump body mouth ring of the first stage. The suction box body is internally provided with a plurality of first guide plates which are distributed up and down, a plurality of second guide plates which are distributed up and down are arranged between the head cover and the cover plate, and the first guide plates and the second guide plates are symmetrically arranged. The first-stage front pump body mouth ring and the first-stage rear pump body mouth ring are respectively connected with the cover plate and the suction box body through spot welding, and the first-stage front impeller mouth ring and the first-stage rear impeller mouth ring are respectively connected with the first-stage impeller through spot welding. The improved first-stage double-suction shell mouth ring mounting structure has the advantages that the structure is easy to mount and dismount, a cover plate for mounting the first-stage front impeller mouth ring is integrated on a head cover, the number of mounted and dismounted parts is reduced, the structure is stable in suction performance, the structures on two sides of an impeller are symmetrical, a suction box body and a guide plate at the head cover are symmetrically designed, left-right suction performance balance is ensured, the structure is stable in use, the diameter of the left-side mouth ring of the impeller is slightly large, slight axial force towards the left is caused, the impeller is prevented from moving towards the right, a circular retainer ring is designed at the left side of the impeller, and the structure is prevented from moving towards the left side. Drawings The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings. Fig. 1 is a schematic structural view of the present utility model. FIG. 2 is a schematic diagram of an inhalation function according to the present utility model. Fig. 3 is a cross-sectional view of fig. 2B-B in accordance with the present utility model. Fig. 4 is a schematic view of a head cover according to the present utility model. Fig. 5 is a cross-sectional view A-A of fig. 4 in accordance with the present utility model. Detailed Description The drawings illustrate the structure of the present utility model, and details thereof are further described below with reference to the drawings. In this embodiment, referring to fig. 1-5, this first-stage double suction casing mouth ring mounting structure, including pump body 8, main shaft 1, suction letter body 7, head cap 3 and first-