CN201568437U

CN201568437U - Large-size long axis

Info

Publication number: CN201568437U
Application number: CN2009203189607U
Authority: CN
Inventors: 马林
Original assignee: DEYANG ZHONGHENG HEAVY INDUSTRY MACHINERY Co Ltd
Current assignee: Deyang Zhongheng Heavy Industry Machinery Co., Ltd.
Priority date: 2009-12-30
Filing date: 2009-12-30
Publication date: 2010-09-01
Anticipated expiration: 2019-12-30

Abstract

The utility model discloses a large-size long axis and belongs to the field of axle machinery. The large-size long axis is divided into two axis bodies and a welding groove is arranged between the axis bodies. Due to the sub-sectional forging, the manufacturing period is shortened about 70%, the forging cost is saved about 40%, the demand on the forging equipment is decreased, the development of small and medium size forging enterprises is promoted, the social resource is optimized, the supply and demand contradiction is relieved and the natural gas resource is saved.

Description

A kind of large-scale long shaft

Technical field

The utility model relates to a kind of part, particularly a kind of big profile shaft spare.

Background technique

Both at home and abroad energy demand is increased day by day at present, especially the clean environment firendly energy, such as water power, wind-powered electricity generation etc., and the also corresponding increaseization of the parts of generator set, such as rotor, main shaft single-piece weight is all about 100 tons, and whole axle is an integral body, need carry out overall time forges, referring to Fig. 1, but produce the large-scale like this forged shaft more than 100 tons, under present market condition, has only a Chinese weight, China's two-fold, on heavily wait large enterprise of several family to have such forging ability rare owing to forge the apparatus expensive of this large-scale long shaft, cause apparent availability few, and the forging manufacture cycle is very long, usually need about 1 year while manufacture cost height, big energy-consuming.And at present middle-size and small-size about 4000 tons forging equipment is a lot, but does not possess the ability of forging this large-scale long shaft, causes the wasting of resources.

The model utility content

Goal of the invention of the present utility model is: at the problem of above-mentioned existence, provide a kind of novel large major axis that does not use large-sized forging equipment just can reach the purpose of manufacturing large-scale long shaft and can shorten the manufacturing cycle significantly.

The technical solution adopted in the utility model is such: this large-scale long shaft, whole main shaft is divided at least two sections axis bodies, is processed with bevel for welding between section and the section.

As preferably: whole main shaft is divided into three sections axis bodies.

As preferably: the tilt angle of described bevel for welding is less than 3 degree.

In sum, owing to adopted technique scheme, the beneficial effects of the utility model are:

1, adopts setting down, shortened the manufacturing cycle 70%;

2, saved 40% forging expense;

3, do not rely on main equipment, reduced requirement, driven middle-size and small-size development of forging enterprise, optimized social resources, alleviated imbalance between supply and demand equipment;

4, saved natural gas energy resource.

Description of drawings

Fig. 1 is the utility model prior art constructions schematic representation;

Fig. 2 is the utility model embodiment's a structural representation;

Fig. 3 is the partial enlarged drawing among Fig. 2.

Mark among the figure: 1 is one-piece rotor shaft, and 2 is axis body, and 3 is bevel for welding.

Embodiment

Below in conjunction with accompanying drawing, the utility model is done detailed explanation.

In order to make the purpose of this utility model, technological scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

As shown in Figure 2, a kind of large-scale long shaft, one-piece rotor shaft 1 are divided into three sections axis bodies 2, are provided with bevel for welding 3 between the axis body 2, are convenient to welding, and the tilt angle of bevel for welding 3 is 2 degree.

Its manufacture method is:

A, setting down: whole main shaft 1 is divided into three sections axis bodies 2 and carries out the axis body blank forging, and whole main shaft 1 length is 8000mm, and three sections axis body 2 length that are divided into are respectively 2000mm, 4000mm and 2000mm, and wall thickness is 400mm;

B, processing bevel for welding: every section blank is carried out roughing see light, reach the flaw detection requirement, roughness reaches 3.2, and every section is detected a flaw, processing bevel for welding 3 between every section axis body then, and the angle of inclination of bevel for welding 3 is 2 to spend;

C, assembly welding: connect equipment with narrow gap welding every section axis body 2 is welded combination; Weld seam is less than 25mm, and the depth of weld is 500mm during welding, the rifle mouth of the welding gun of the narrow gap welding machine of use, conductive plate, electric conductor and all corresponding prolongation of flux hopper transporting system 160mm, and adopt corronil to prolong described conductive plate as material;

D, disappear and answer dehydrogenation to handle: disappear after the welding and answer dehydrogenation to handle, it disappears, and to answer temperature be between 560 ℃～600 ℃, and holding time is 12 hours, and the dehydrogenation temperature is 350 ℃.Handle butt welded seam surface, back and carry out polishing grinding, carry out carrying out flaw detection then, obtain the main shaft finished product at last.Disappearing when answering dehydrogenation to handle, adopting that support roller is auxiliary to rotate main shaft, is having additional speed reducer, speed-adjustable motor and stepless speed regulation controllable device on the support body of support roller, and adopting the electronic induction heater to anneal to disappear and answer dehydrogenation to handle.Owing to adopt setting down, shortened the manufacturing cycle 70%; Saved 40% forging expense; Reduced requirement, driven middle-size and small-size development of forging enterprise, optimized social resources, alleviated imbalance between supply and demand equipment; Saved natural gas energy resource simultaneously.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. large-scale long shaft, it is characterized in that: whole main shaft is divided at least two sections axis bodies, is provided with bevel for welding between the axis body.

2. a kind of large-scale long shaft according to claim 1 is characterized in that: whole main shaft is divided into three sections axis bodies.

3. a kind of large-scale long shaft according to claim 1 and 2 is characterized in that: the tilt angle of described bevel for welding is less than 3 degree.