CN2311606Y

CN2311606Y - Turbogenerator casing

Info

Publication number: CN2311606Y
Application number: CN 96246414
Authority: CN
Inventors: 芦长喜; 刘上椿; 任传发; 戴雪康
Original assignee: HARBIN XUNDA GLASS REINFORCED
Current assignee: HARBIN XUNDA GLASS REINFORCED
Priority date: 1996-12-28
Filing date: 1996-12-28
Publication date: 1999-03-24
Anticipated expiration: 2006-12-28

Abstract

The utility model relates to a turbogenerator end cover, which is made of high-intensity glass-reinforced plastic material. An end cover of a hydrogen cooled turbogenerator is an annular end cover. An end cover of an air-cooled turbogenerator is composed of an inner end cover, an outer end cover and a lower end cover which adopt vertical types. Because the shaft sectional areas of the end covers of large and medium hydrogen cooled turbogenerators and the inner end cover and the outer end cover of the air-cooled turbogenerator are large, the end covers can be made into left-right symmetry half types. A reinforcing rib is added on the outer surface of the end cover. A stainless steel sleeve embedded on a joint face is penetrated by screws among the end covers and a generator base or the end covers for fixing. The end cover overcomes the problems of corruption, electromagnetic loss, and windage loss and problems in manufacture of the existing aluminum alloy casting end cover.

Description

The steam turbine generator end cap

A kind of steam turbine generator end cap belongs to the parts on the steam turbine generator equipment.

No matter be that hydrogen-cooled or its end cap of air-cooling type all adopt the manufacturing of diamagnetism aluminium alloy castings, though they have reduced the leakage field that produces greatly because of specific electric load, still still there are stray losses such as eddy current in existing large, medium and small type steam turbine generator at present.And aluminium alloy castings is prone to sand holes, crack and distortion in fabrication and processing, is difficult for repairing, correcting the reject rate height.Also have the complex-shaped of various end caps, all can not carry out machining except that the mating face, casting surface is coarse, and the wind abrasion is big.Have again for fear of the generator unit stator winding being beaten when withstand voltage,, enlarged the distance between stator winding end, nose and the end cap, consumed more material like this end cap discharge.The Aluminum Alloy Cover soundproof effect is bad, and vibrations in the generator and noise are spread out of.

The purpose of this utility model is in order to overcome the problem that above Aluminum Alloy Cover exists, to design the steam turbine generator end cap of a kind of new material, structure.

This novel steam turbine generator end cap, replace aluminium alloy castings with the high strength glass steel, and it is lower at the Young's modulus of glass fibre reinforced plastic material, the problem of rigidity deficiency is on the outer surface of frp end caps, according to stressing conditions and structure shape, increase stiffening rib with a setting line, and in the middle of stiffening rib, embed the high strength glass fabric swatch of solidifying, and improve its rigidity, reduce to shrink and deformation.

Because steam turbine generator is divided into hydrogen-cooled and air-cooling type, according to the different types of cooling, the structure shape difference of its end cap, the end cap of perhydro cold-peace water hydrogen is the end cap of a circular shape, and the end cap of water-air cooling and full air-cooled steam turbine generator is made up of three vertical inner end cap, outer end cap and lower end caps.Shaft section for large and medium-sized hydrogen end cap and the inside and outside end cap of air-cooled steam turbine generator is long-pending bigger, can be made into symmetrical branch half formula, locate to give to bury a plurality of stainless steel sleeves on the mating face of two halves, the two halves end cap is fixed into one closing by screw.The inside and outside end cap of the end cap of small-sized hydrogen and air-cooled steam turbine generator can be made one.

This frp end caps is an electrical insulator, and it has overcome the leakage field of existing Aluminum Alloy Cover and has had eddy current stray loss problem; Shortened stator end length, reduced the loss of material, avoided stator winding insulation to beat when withstand voltage, the electric discharge phenomena of end cap; Eliminated the electrochemical corrosion on the mating face between end cap and support, especially more remarkable to hydrogen cooled generator; Its process is to mould compression and moulding, curing, and smooth surface has reduced wind moussing loss, and amount of finish is minimum, can repair, and no waste product, in light weight, easily installing/dismounting is aesthetic in appearance; The damping constant of glass fibre reinforced plastic material is big, makes the very fast decay of machine internal vibration, noise, can shockproof sound insulation.This frp end caps has great economic benefit and social benefit.

Description of drawings:

The plan view of Fig. 1 hydrogen end cap

Fig. 2 hydrogen end cap at A-A to sectional view

Fig. 3 hydrogen end cap at B-B to sectional view

The plan view of Fig. 4 air-cooled steam turbine generator inner end cap

Fig. 5 air-cooled steam turbine generator inner end cap at A-A to sectional view

The plan view of Fig. 6 air-cooled steam turbine generator outer end cap

Fig. 7 air-cooled steam turbine generator outer end cap at A-A to sectional view

The plan view of Fig. 8 air-cooled steam turbine generator lower end cap

Fig. 9 air-cooled steam turbine generator lower end cap at A-A to sectional view

The attached view of Figure 10 air-cooled steam turbine generator lower end cap

Among the figure 1, hydrogen end cap 2, stainless steel sleeve

3, viewing window oral pore 4, lifting device joint hole 5, stiffening rib

6, air-cooled steam turbine generator inner end cap

7, air-cooled steam turbine generator outer end cap

8, air-cooled steam turbine generator lower end cap

9, explosionproof hole

Embodiment:

The hydrogen end cap is the end cap 1 of a ring, and it is by the positioning hole on the mating face, puts together on an end of generator pit with screw, as shown in Figure 1, 2, 3.This end cap 1 is by bilateral symmetry dimidiation radially, and the place, mating face half and half gives and buries a plurality of stainless steel sleeves 2, and the stainless steel sleeve about passing with screw on two end caps makes their be fixed into one closing.On the end cap face, by radial and axial increase stiffening rib 5, and between stiffening rib, be center line with minute half line, that makes two groups of symmetries uses joint hole 4 for lifting, and makes 4 symmetrical circular viewing window oral pores 3, and the viewing window oral pore also can be other shape.

The air-cooled steam turbine generator end cap is made up of three vertical inner end cap 6, outer end cap 7 and lower end cap 8, and wherein an end of inner end cap axial engagement face and generator pit is fixed, and lower end cap is assemblied in the lower end of inner end cap, and outer end cap is assemblied in the outside of inner end cap.Shown in Fig. 4,5, this inner end cap 6 is by radially being divided into symmetrical two halves, place, mating face half and half, give and bury a plurality of stainless steel sleeves 2, so that two halves are fixed into one closing, on the end cap face, press stressing conditions and structure shape, be center line with minute half line, left and right symmetrically increases stiffening rib 5, and makes the difform inspection hole oral pore 3 of two groups of symmetries.Outer end cap also is symmetrical branch half formula shown in Fig. 6,7, gives at the place, mating face of two halves and buries a plurality of stainless steel sleeves 2, so that be fixed into one closing.Lower end cap is whole trapezium structure shown in Fig. 8,9,10, make the explosionproof hole of two circles on its outer surface, and this hole also can be other shape.

This glass fibre reinforced plastic material can be used on the various end caps such as making the AC and DC motor.

Claims

1. steam turbine generator end cap, it is characterized in that making with the high strength glass steel, wherein, the hydrogen end cap is the end cap of a ring, and the end cap of air-cooled steam turbine generator is made up of three vertical inner end cap, outer end cap and lower end caps, on the outer surface of hydrogen end cap and air-cooled steam turbine generator inner end cap, according to stressing conditions and structure shape separately, increase stiffening rib, and in the middle of stiffening rib, embed the high strength glass fabric swatch of solidifying with a setting line.

2. two kinds of steam turbine generator end caps according to claim 1, it is characterized in that for the shaft section of the inside and outside end cap of the end cap of large and medium-sized hydrogen and air-cooled steam turbine generator end cap long-pending bigger, can be made into symmetrical branch half formula, locate to give to bury a plurality of stainless steel sleeves on the mating face of half and half end cap, by screw they are fixed into one closing, the end cap of small-sized hydrogen, and the inside and outside end cap of air-cooled steam turbine generator can be made one.

3. a kind of steam turbine generator end cap according to claim 1 is characterized in that on hydrogen end cap and air-cooled steam turbine generator inner end cap, also has a plurality of difform viewing window oral pores.

4. a kind of steam turbine generator end cap according to claim 1 is characterized in that on the hydrogen end cap face, also has two groups of joint holes that lifting device is used.

5. a kind of steam turbine generator end cap according to claim 1 is characterized in that on the outer surface of air-cooled steam turbine generator lower end cap two explosionproof holes being arranged.