CN202673746U

CN202673746U - Pump shaft structure

Info

Publication number: CN202673746U
Application number: CN 201220322369
Authority: CN
Inventors: 徐阳; 罗研; 王玉心; 冯明兴
Original assignee: Shanghai Kaiquan Pump Group Co Ltd
Current assignee: Shanghai Kaiquan Pump Group Co Ltd
Priority date: 2012-07-04
Filing date: 2012-07-04
Publication date: 2013-01-16
Anticipated expiration: 2022-07-04

Abstract

The utility model discloses a pump shaft structure. The pump shaft structure is characterized by comprising an upper flange, a lower flange and a shaft body, all of which are forged separately, wherein the upper flange and the lower flange after being connected with the shaft body through cylindrical pins are welded. Compared with the prior art, the pump shaft structure, disclosed by the utility model, has the beneficial effects of a simple structure, cost reduction, speeded-up date of delivery of products, extreme convenience for operation and use, and capabilities of bearing various stresses under different work conditions, and improving service life of the pump shaft part; and therefore, the pump shaft is widely applied to big- or medium-scale key water conservancy projects.

Description

A kind of pump shaft structure

Technical field

The utility model relates to large-scale vertical axle (mixing) stream pump, relates in particular to the pump shaft structure of this pump.

Background technique

As everyone knows, large-scale vertical axle (mixing) stream pump is because match power is larger, pump shaft structure adopts flange to connect with motor shaft usually, it needs enough strength and stiffness to bear various stressed under the different operating modes, therefore whether the design of depending on to a great extent pump shaft structure working life of vertical-type axial-flow pump pump shaft is reasonable, and whether mechanical property is reliable and stable.

As seen from Figure 1: original pump shaft parts are the 45# Steel material, two

end flange

1,2 and axle body 3 be the solid forging structure, the often restriction because of forging time and technique causes local crackle to affect the life-span in the practical application.For above problem existing pump axle construction is improved, made its more lasting operation.

The model utility content

The utility model technical issues that need to address provide a kind of pump shaft structure of large-sized vertical-type axial-flow pump, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

A kind of pump shaft structure is characterized in that, comprises the upper and lower flange and the axle body that separately forge, welds after adopting straight pin to be connected between described upper and lower flange and the axle body.

Compare with original technology, the beneficial effects of the utility model are: simple in structure, cost, accelerate due date, and operation and use are extremely convenient, can bear various stressed under the different operating modes, the working life of having improved the pump shaft parts, therefore this pump shaft structure was widely used at large and medium-sized emphasis water resources projects.

Description of drawings

Fig. 1 is original pump shaft structure schematic representation;

Fig. 2 is the utility model structural representation.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

Referring to Fig. 2, the pump shaft structure that provides among the figure, its with upper and

lower flange

10,20 and axle body 30 adopt respectively high-quality 45# forging to make, the mechanical property of forging arbitrary section should keep evenly not allowing to exist the internal injuries such as white point, shrinkage cavity.

Consider the convenience of safety check and whole reliability, at upper and

lower flange

10,20 and that four straight pins 40 are set respectively is fixing in axle body 30 connection places, before welding, join and do in the axle body.

Upper and

lower flange

10,20 and axle body 30 open V-arrangement and U-shaped groove, both are preheating to respectively 150-200 ℃ before wrapping weldering, the 1-2 layer is manual welding, all the other are semiautomatic welding.Last welding bead of multi-layer welding plays pre-heat effect to a rear welding bead, and then a welding bead plays thermal processes act (annealing or slow cooling) to last welding bead, is conducive to improve plasticity and the toughness of weld metal.

Processings of detecting a flaw after pump shaft parts welding is finished, 570 ° of C of welding part tempering, strict control heating and the speed of cooling off.Through sand blast, surface quality reaches 1/2 grade of Sa2 to the pump shaft parts after heat treatment.Facts have proved and adopt split to forge the Novel pump shaft reasonable in design of rear welding, simple in structure, reliable, be used widely at large and medium-sized emphasis water resources projects.

Claims

1. a pump shaft structure is characterized in that, comprises the upper and lower flange and the axle body that separately forge, welds after adopting straight pin to be connected between described upper and lower flange and the axle body.