Unlock instant, AI-driven research and patent intelligence for your innovation.

Intermittently welded impeller and welding method thereof

A technology of intermittent welding and welding method, which is applied in the field of intermittent welding impeller and its welding, can solve the problems of reduced number of welding spots, limited welding strength, insufficient strength, etc., and achieves small dimensional changes, convenient operation and high mechanical strength. Effect

Active Publication Date: 2013-01-23
LEO GRP ZHEJIANG PUMP CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The energy-concentrated welding impeller has small deformation, but the welding strength is limited, and the number of welding spots is reduced. After welding, there are gaps between the front and rear cover plates and the blades. Not good enough, there are quality problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Intermittently welded impeller and welding method thereof
  • Intermittently welded impeller and welding method thereof
  • Intermittently welded impeller and welding method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] Implementation mode one: if figure 1 As shown, the intermittently welded impeller includes a back cover 1 and a plurality of arc-shaped blades 2, and the arc-shaped blades 2 are evenly welded on the back cover 1, and it is characterized in that: the arc-shaped blades 2 and the back cover The welding seam between 1 is divided into multi-section welding seam 6, and the welding seam 6 of each section is provided with broken welding spot 3.

[0029] The length of the broken welding spot 3 is ≤5 mm, and the length of each segmented weld 6 is 20-30 mm.

[0030] The welding method has the following steps:

[0031] 1. Fix the formed curved blade 2 on the rear cover 1;

[0032] 2. First, divide the trajectory line of the arc-shaped blade 2 in contact with the rear cover plate 1 into multi-segment segmented trajectories 8, and separate the solder joints 3 between each segmented trajectory 8, and then weld the head and tail ends of the arc-shaped blade 2 and the rear cover The ...

Embodiment approach 2

[0034] Implementation mode two: if figure 2 , 3 As shown: the intermittently welded impeller also includes a front cover 4, the arc-shaped blade 2 is clamped between the front cover 4 and the rear cover 1, the front cover 4 and the arc-shaped blade 2 are welded and fixed, and the front The welding seam between the cover plate 4 and the arc-shaped blade 2 is also divided into multi-section welding seams 6, and there is a broken welding spot 3 between each section of the welding seam 6. For its structure and welding method, refer to Embodiment 1, which is omitted here. .

[0035] The finished impeller with a diameter design standard of 260 mm adopts the intermittent welding of the present invention, and the actual size is 259.65-259.82 mm; the width of the impeller outlet is reduced by 0 to 0.1 mm between the blades and the front and rear cover plates, and between the blades, the front and rear cover plates Deformation is reduced from 0 to 0.2mm. After welding, there is no g...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a welded impeller, in particular to an intermittently welded impeller and a welding method thereof. The conventional stainless steel welded impeller has small size and mechanical strength before and after welding so as to be easy to break. Thus, the intermittently welded impeller comprises a rear cover plate and a plurality of cambered blades, wherein the cambered blades are uniformly welded on the rear cover plate; a welding seam between the cambered blades and the rear cover plate is partitioned into a plurality of sectioned welding seams; and intermittent welding points are arranged between every two of the sectioned welding seams. The intermittently welded impeller also comprises a front cover plate; and the cambered blades are sandwiched between the front cover plate and the rear cover plate. The invention also relates to the welding method corresponding to the intermittently welded impeller. The intermittently welded impeller of the invention has the advantages of simple structure, high mechanical strength and small change in size before and after welding and is an ideal substitute product for the conventional stainless steel welded impeller; and thewelding method of the impeller has simple steps and is convenient to operate.

Description

technical field [0001] The invention relates to a welding impeller, in particular to an intermittent welding impeller and a welding method thereof. Background technique [0002] Water pump impellers include cast impellers and impervious welded impellers. Among them, the cast impeller has high strength and small dimensional error, but it also has disadvantages such as rough flow path, many consumables, and heavy weight; [0003] Compared with cast impellers, impermeable steel welded impellers have outstanding advantages such as smooth flow passage, light weight, less consumables, corrosion resistance, long life, and less secondary pollution during use. They are used in food, brewing, pharmaceuticals, fine chemicals, Fire sprinkler systems and urban water supply and drainage have been widely used. [0004] The existing welded impellers of impermeable steel are all welded with continuous seams, and the welding methods include continuous laser welding and energy-concentrated we...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/22B23K31/02
Inventor 毛水平陈超
Owner LEO GRP ZHEJIANG PUMP CO LTD