CN103683709A - Quick lifting method for online drawing rotor of large motor - Google Patents

Abstract

The invention relates to the field of maintenance of steel equipment, in particular to a quick lifting method for online drawing a rotor of a large motor. The quick lifting method comprises the steps as follows: dismantling a cardan shaft of the motor; dismantling an upper tile of a bearing base of the motor, an outer cover of the motor and a foundation bolt of a stator of the motor; dismantling an encoder of the motor and a thrust bearing. The quick lifting method is characterized in that a lifting beam of the rotor is lifted by a traveling crane and arranged at the top of the stator of the motor; chain blocks and steel cables are hung at the two ends of the lifting beam of the rotor; the rotor of the motor is lifted through the chain blocks, and is not contacted with the interior of the stator of the motor; electric hydraulic jacks are erected at the four corners of the stator of the motor and used for synchronously lifting the stator of the motor and the rotor, fixed through the lifting beam of the rotor, of the motor; when the electric hydraulic jacks are lifted to the lowest position of the rotor of the motor beyond the plane of the bearing base, the lifting beam of the rotor is lifted by the traveling crane, and the rotor of the motor is drawn out. The quick lifting method can quickly and safely lift the large motor and finish the rotor drawing operation, and overcomes the defects in the traditional large motor lifting operation.

Description

Large-size machine is taken out the fast servo method of rotor online

Technical field

The present invention relates to steel rolling equipment area of maintenance, be specially a kind of fast servo method that large-size machine is taken out rotor online.

Background technology

At current smelter, large motor is taken out online rotor and is generally adopted motor jacking---take out the method for rotor, jack-block is that the driving rated load weight based in workshop, rolling mill main motor place is generally less than motor total weight, can not hook block electrizer rotor and a stator, therefore, must utilize driving and jack using rotor and stator as separating component simultaneously, by the principle repeatedly alternately hoisting, realize.The general thought that the method realizes is to utilize traveling crane to hang rotor, by mechanic jacks, be distributed in four footing of stator and withstand stator, then use lifting of travelling crane rotor, lifting altitude is less than the air gap value between rotor and stator, after rotor hoists and puts in place, four mechanic jacks of stator footing have been shaken, synchronization of jacking up stator, the rising height of stator is less than 2 times of air gap values, this is a jacking, then adopting uses the same method carries out repeatedly repeatedly, can realize the synchronization of jacking up of rotor and stator.

Above-mentioned motor jacking---take out the method for rotor, mainly there is following problem: 1, the air gap value of rotor and stator is generally very little, the 7000KW synchronous motor that Shanghai motor group manufactures of take is example, air gap value is only 15mm, the lifting altitude maximum of hence one can see that each motor can not surpass 30mm, according to total lifting altitude 900mm calculating, altogether needs 900mm ÷ 30mm/ time=30 time motor could be pushed up to the position of taking out rotor, often, the time is long in jacking; 2, each jacking need to be replaced and coordinate realization with mechanic jacks timed delivery by driving, and mechanic jacks operates by artificial mode, and synchronism is difficult to ensure card, and slightly deviation will cause rotor and stator to collide, and the risk of scraping is large; 3, in said method, must adopt mechanic jacks, definitely can not replace by hydraulic jack, once because hydraulic jack occurs to leak or be asynchronous, stator contacts with rotor, cause total weight to act on driving upper, the serious accident that driving lifting capacity transfinites occurs most probably; 4, mechanic jacks jacking stator is realized by manual type, and inefficiency is long in time limit, and cost is high.

Summary of the invention

The object of the invention is to overcome the existing defect of existing lifting Large Rotor method, provide a kind of required construction operation time short, save manpower, the online fast servo method of large-size machine safe, that can guarantee operation quality.

In order to achieve the above object, the present invention is achieved in that

Large-size machine is taken out a fast servo method for rotor online, and it comprises the steps:

Step 1, motor cardan are removed and hang;

Step 2, electric wiring and instrument are removed;

Step 3, motor two end axles bearing tears upper cover open and upper watt dismounting hangs, and outsides cover of electric machinery and annex are removed and hung, and motor stator anchor bolt is removed;

Step 4, motor encoder, thrust bearing and annex are removed and are hung;

Step 5, the assembling of motor expanded shaft;

It is characterized in that: also comprise a roots rotor hanging beam, jack, wirerope and following steps,

Step 6, with traveling crane, play rotor hanging beam, hanging beam is arranged to motor stator top leveling, then at rotor hanging beam two ends, hang jack, wirerope, and by jack, rotor is mentioned, rotor does not contact with motor stator inside;

Step 7, at motor stator quadrupod, establish one group of electric hydraulic lifting jack, the synchronous jack-up motor stator of described electric hydraulic lifting jack and by the fixing rotor of rotor hanging beam;

Step 8, electric hydraulic lifting jack is risen to rotor lowest order exceed bearing pedestal plane, then play rotor hanging beam with traveling crane, extract rotor out.

The present invention adopts above-mentioned operational method, can be fast, effectively, safely by large-size machine jacking and complete and take out rotor operation, thereby overcome the existing defect of existing traditional large-size machine lifting operation.

Accompanying drawing explanation

Fig. 1 is the front view of syndeton of the present invention.

Fig. 2 is the left view of syndeton of the present invention.

Embodiment

By specific embodiment, further illustrate the present invention below.

As shown in Figure 1 and Figure 2:

Large-size machine is taken out a fast servo method for rotor online, and it comprises the steps:

Step 1, motor cardan are removed and hang;

Step 2, electric wiring and instrument are removed;

Step 3, motor two end axles bearing tears upper cover open and upper watt dismounting hangs, and outsides cover of electric machinery and annex are removed and hung, and motor stator anchor bolt is removed;

Step 4, motor encoder, thrust bearing and annex are removed and are hung;

Step 5, the assembling of motor expanded shaft;

Also comprise a roots rotor hanging beam 1, jack 6, wirerope 7 and following steps,

Step 6, with traveling crane, play rotor hanging beam 1, rotor hanging beam 1 is arranged to motor stator 3 tops leveling, then at rotor hanging beam 1 two ends, hang 6 jacks, wirerope 7, and by jack 6, rotor 2 is mentioned, rotor 2 does not contact with motor stator 3 inside;

Step 7, at motor stator 3 quadrupods, establish one group of electric hydraulic lifting jack 4, the synchronous jack-up motor stator 3 of described electric hydraulic lifting jack 4 and by the fixing rotor 2 of rotor hanging beam 1;

Step 8, electric hydraulic lifting jack 4 is risen to rotor 2 lowest orders exceed bearing pedestal plane, then play rotor hanging beam 1 with traveling crane, extract rotor 2 out, so far, rotor lifting operation is complete.

The present invention adopts above-mentioned operational method, when carrying out taking out online repairing rotor or installing such as rolling mill main motor, can realize rolling mill main motor online fast, effectively, jacking complete and take out rotor operation safely, thereby overcome the existing defect of existing traditional large-size machine lifting operation.

Claims (1)

1. large-size machine is taken out a fast servo method for rotor online, and it comprises the steps:

Step 1, motor cardan are removed and hang;

Step 2, electric wiring and instrument are removed;

Step 3, motor two end axles bearing tears upper cover open and upper watt dismounting hangs, and outsides cover of electric machinery and annex are removed and hung, and motor stator anchor bolt is removed;

Step 4, motor encoder, thrust bearing and annex are removed and are hung;

Step 5, the assembling of motor expanded shaft;

It is characterized in that: also comprise a roots rotor hanging beam, jack, wirerope and following steps,

Step 6, with traveling crane, play rotor hanging beam, hanging beam is arranged to motor stator top leveling, then at rotor hanging beam two ends, hang jack, wirerope, and by jack, rotor is mentioned, rotor does not contact with motor stator inside;

Step 7, at motor stator quadrupod, establish one group of electric hydraulic lifting jack, the synchronous jack-up motor stator of described electric hydraulic lifting jack and by the fixing rotor of rotor hanging beam;

Step 8, electric hydraulic lifting jack is risen to rotor lowest order exceed bearing pedestal plane, then play rotor hanging beam with traveling crane, extract rotor out.

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