CN2613921Y - End copper shielded double-water internal cooling turbine generator - Google Patents

Abstract

The utility model relates to a copper shield turbo-generator with inner water cooled stator and rotor for the end portion, comprising a stator core, a stator winding bar, a clamping ring, a clamping ring cooling water pipe and a rotor, and is characterized in that the clamping ring cooling water pipe is demolished, the outsides of the two end clamping rings of the stator core are provided with the copper shield, and a bracket is provided in the outside of the copper shield. The utility model has the advantages that the temperature of the stator end constructional element is reduced, the nominal output of the airturbine generator is enhanced, the wasting is reduced, and the radial runnability and efficiency are enhanced.

Description

The end turbo-generator with inner water-cooled stator and rotor of copper shield

Technical field

The utility model relates to the turbo-generator with inner water-cooled stator and rotor of a kind of end with copper shield, is mainly used in 125MW, 300MW generating set, belongs to 125MW, 300MW turbo-generator with inner water-cooled stator and rotor capacity increasing technique field.

Background technology

Early stage 125MW, the 300MW turbo-generator with inner water-cooled stator and rotor of producing of my company exerted oneself when reaching 135MW and 330MW, and the end construction spare temperature of turbo-generator with inner water-cooled stator and rotor surpasses the national standard requirement, can not full power advance to 0.95 long-time running.

Summary of the invention

The purpose of this utility model is a kind of reduction generator end loss of invention, improves the turbo-generator with inner water-cooled stator and rotor of the end of generator rated output with copper shield.

For realizing above purpose, the technical solution of the utility model provides the turbo-generator with inner water-cooled stator and rotor of a kind of end with copper shield, it comprises stator core, stator bar, trim ring and end trim ring cooling water pipe, rotor, its characteristics are, remove end trim ring cooling water pipe, outside the trim ring of stator core two ends, be equipped with copper shield, be placed on outside the copper shield.

Copper shield is circle basin shape, and hollow copper tubing places the inner ring of copper shield, and the inside water flowing is connected with former end cooling water outer water tube, strengthens the end cooling, and the copper shield race diameter is 2250mm-3080mm, and inner ring diameter is 1500mm-1600mm.

Outside the trim ring of turbo generator iron core two ends, load onto copper shield, when the alternation leakage flux is passed through copper shield, produce eddy current therein, and eddy current magnetism and stray field equal and opposite in direction that eddy current produces, direction is opposite, flow to stator end thereby suppressed leakage flux, force a part of leakage flux under the hierarchic structure effect of end, radially to enter stator end simultaneously, therefore trim ring and stator core yoke portion are played shielding action by axially changing into.

The utility model has the advantages that:

1. reduced the temperature of stator end structural member;

2. make the rated output of 125MW and 300MW turbo generator bring up to 135MW and 330MW, full power is advanced to 0.95 long-time running.

3. reduce the wastage, two ends reduce 90KW approximately, have improved efficient like this, make the efficient of 125MW and 300MW turbo generator reach 98.4% and 98.72% respectively.

Description of drawings

Fig. 1 is the turbo-generator with inner water-cooled stator and rotor structural representation of end with copper shield;

Fig. 2 is the copper shield structural representation;

Fig. 3 is a copper shield A-A profile.

Embodiment

As shown in Figure 1, be the turbo-generator with inner water-cooled stator and rotor structural representation of end with copper shield, it comprises stator core 1, stator bar 2, trim ring 3, support 4, copper shield 5, rotor 9.

Select for use the red copper material to be pressed into copper shield 5 with mould, shown in Fig. 2,3, copper shield 5 is shaped as round basin shape, race diameter is 2290mm, and inner ring diameter is 1516mm, 18 copper cushion blocks 7 of evenly burn-oning in the outer ring of copper shield 5, at inner ring 7 cushion blocks 8 of burn-oning, hollow copper tubing 6 is welded in the inner ring of copper shield 5.

Remove end trim ring cooling water pipe, copper shield 5 is installed in outside the trim ring 3 at stator core 1 two ends, support 4 is by being contained in copper shield 5 usefulness bolts on the trim ring 3.

Claims (3)

1. an end is with the turbo-generator with inner water-cooled stator and rotor of copper shield, it comprises stator core (1), stator bar (2), trim ring (3) and end trim ring cooling water pipe, rotor (9), it is characterized in that, remove end trim ring cooling water pipe, be equipped with copper shield (5) outside stator core (1) two ends trim rings (3), support (4) places outside the copper shield (5).

2. the end according to claim 1 turbo-generator with inner water-cooled stator and rotor of copper shield, it is characterized in that, described copper shield (5) is circle basin shape, evenly be equipped with several piece copper cushion block (7) in the outer ring of copper shield (5), inner ring evenly is equipped with several piece cushion block (8), and hollow copper tubing (6) places the inner ring of copper shield (5).

3. use the turbo generator of copper shield according to claim 1,2 described ends, it is characterized in that described copper shield (5) race diameter is 2250mm-3080mm, inner ring diameter is 1500mm-1600mm.

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