CN100479298C

CN100479298C - New type ventilation system of vertical hydraulic gengrator

Info

Publication number: CN100479298C
Application number: CNB021445753A
Authority: CN
Inventors: 陈季平; 陈亚林
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-11-05
Filing date: 2002-11-05
Publication date: 2009-04-15
Anticipated expiration: 2022-11-05
Also published as: CN1416200A

Abstract

The invention aims at providing a new type structure of the ventilation system for reconstructing the old type hydraulic generator. The new type structure possesses the advantages of the simple structure, the safe operation, the easy of amaintenance, the high heat dispersion efficiency and the low axial height of the generator. The characteristics of the invention are that the relevant air flue is formed in the traditional generator through the following special structures. The revolving wind catcher is installed around the disc of the rotor yoke. The gap structure is formed among the ring plate, the pressboard and the coil of the stator. There is the blowhole on the wall at the end part of the stator, forming the inlet air opening of the cooling blast. The radial pressurizing spoke plates increase the blowing effect of the spider.

Description

The ventilating system of vertical hydrogenerator

Technical field

The invention belongs to the innovation of the ventilating system of vertical full air-cooled hydrogenerator, belong to technical field of motors.

Background technology

During the vertical hydrogenerator operation, because the alternation of electromagnetic field and windage produce loss in the machine, these losses change into heat, cause temperature rising in the motor, for the insulation operate as normal in the temperature limit of regulation that guarantees motor, must take certain measure during design of electrical motor, manage these heats are led to loose to distribute, as adopting water-cooled, half water-cooled, the mode of air cooling entirely to the outside of motor.Full air cooling mode is exactly to utilize the effect of motor rotation, structurally additional diversion components, make the air in the motor mobile in motor according to the circuit of appointment, the heat that produces in the motor is constantly led the outside of loosing to motor, pass through heat exchanger then, as aerial cooler, these heat conduction feedwater are taken away.Alleged " ventilating system " means the glide path of air cooling motor when operation air and along the general name of the additional guide flow structure parts of journey.The quality of ventilating system is made a world of difference to the comfort level of the radiating efficiency of motor height and security of operation and maintenance, maintenance.Existing vertical full air-cooled hydrogenerator ventilating system, as shown in Figure 1: after the cooling blast of cooling motor comes out from cooler 3, enter lower air duct respectively by upper air duct air intake vent 1 and lower air duct air intake vent 2, upper air duct is made up of horizontal deep bead 5 on upper cover plate 4 and the stator; Lower air duct is made up of basic plane 9 under horizontal deep bead 10 reaches under the stator.Outlet 27,28 by last lower air duct enters motor again.When entering motor, respectively be divided into two-way up and down, air intake vent 29,30 enters the space of rotor field spider two formers 24 and

rack plate

19,23 compositions about the one route rotor field spider, under the effect of rotor rotation, air radially enters the yoke ventilation ducts 20 that 21 groups in magnetic yoke core builds up, and enters the space that two magnetic poles 22 are formed again; Another road enters fan up and down, and behind bucket type fan or

centrifugal fan

17 and 18, under the effect of fan, the one tunnel axially enters the space that two magnetic poles 22 are formed, with the air interflow that is radially entered by rotor field spider.Two strands of air-flows are after entering this space, because magnetic pole 22 rotations, air is quickened again, and forced air is radially passed air gap 31, pass the stator core 14 folded stator ventilation ductss of making 32, enter the hot blast chamber 26 at stator core 14 backs.The air of this moment has become hot blast owing to absorbed the heat of stator and rotor surface.Hot-air in the hot blast chamber 26 is undertaken becoming cold wind after the heat exchange by cooler 3 and water again, repeats above circulation.Flow path is fan 17 and another strand air of 18 up and down, after passing the slit of 33,34 of stator upper and lower end parts coils, ad hoc ventilation hole on upper ring plate 25 and the lower ring plate 16 enters hot blast chamber 26 again, after equally also becoming hot blast and carrying out heat exchange, reenter motor by aerial cooler 3.

Summary of the invention

The present invention seeks to disclose a kind of ventilating system of vertical hydrogenerator.Order is the design of hydraulic generator and the transformation of old-fashioned hydraulic generator, and a ventilating system structure is provided.Guaranteeing to cancel radial fan and corresponding deep bead in the former ventilating system on the generator basic structure basis of invariable, changing former machine is the end air intake by last lower air duct air intake, and the shutoff upper and lower end parts is leaked out.Air inlet through hollow shaft for the magnetic pole two ends changes the static pressure air intake that is formed the stator upper and lower side by former machine with the centrifugal action of radial fan, in order to utilize the total head air intake of rotation wind scoop rotation wind-guiding effect, rotor field spider makes the oblique air intake of disc type into, and between the two stands former, install radially supercharging disc additional, adjust the capacity and the resistance of cooler, so that mate with new ventilation circuit.Its advantage is: aeration structure is simple, security of operation, and repair and maintenance is convenient, the radiating efficiency height, draft loss is little, and the axial height of whole motor reduces.

The present invention is made up of the air channel of cooler that is installed on generator unit stator external hot air chamber outlet end and generator inside, it is characterized in that: generator forms corresponding air channel by following structure, the rotation wind scoop 42 and 44 of forming a circle is equipped with at place, lower disc outer on the rotor yoke 21 of generator, the air intake vent of wind scoop is opened in the windward side of rotor direction of rotation, forms the air inlet duct of rotor two magnetic poles 22 axial spaces that enter generator.

The shutoff stator upper and lower end parts hole of respectively leaking out, the stator upper and lower side of generator and top and bottom, hot blast chamber form the sealing surface that airless leaks, and cooling air is at the return air air-flow of the stator upper and lower end parts coil cooling of the paired generator of sealing surface profile.

The last lower support wall 7 and 8 of the stator end of generator has ventilation hole 35 and 36, forms the cooling blast inlet of cooler to generator.

Disk cover plate 50 and 51 are stamped in rotor field spider former top and bottom at generator, have

oblique air port

48 and 49 on the cover plate, the rotation of generator amature forms negative pressure, and cold wind sucks the rotor field spider space by

oblique air port

48 and 49, forms the gas channel of secondary rotor yoke.

Between two generator rotor support formers 24, being equipped with the former space segmentation is two-part radially supercharging former 47, strengthens the fanning action of rotor field spider former 24.

Description of drawings

Fig. 1 is a prior art ventilating system schematic diagram of the present invention;

Fig. 2 is that the A of Fig. 1 is to view;

Fig. 3 is an embodiment of the invention system schematic;

Fig. 4 is that the B of Fig. 3 is to view;

Fig. 5 is that the C of Fig. 4 is to view.

Embodiment

As shown in Figure 3, the present invention is guaranteeing to cancel former ventilating system on the motor basic structure basis of invariable.As the fan up and down 17 and 18 among Fig. 1, and corresponding

deep bead

5,6,10,11; On the screw rod of former machine fan attachment, respectively install a circle rotation wind scoop 42 and 44 up and down additional; The shutoff stator upper and lower end parts hole of respectively leaking out; The cancellation fan-shaped deep bead 19 of rotor field spider and 23 makes disk deep bead 50,51 into, and according to the flow performance of rotor field spider air intake, oblique support

air intake vent

48,49 is set; 24 of rotor field spider two formers, install supercharging former 47 additional.Adopt new and effective cooler 3, improve the thermal transmission coefficient of cooler, reduce the stator windage of motor, improve the total blast volume of motor.

The circulation of the cooling air of ventilating system of the present invention is: after cooling air comes out from cooler 3, at first pass the ventilation hole of opening on the lower support wall 7 and 8 on the stator 35 and 36 and enter motor, after cooling off stator upper and lower end parts coil 33 and 34 earlier, one road quilt wind scoop 42,44 up and down sucks and axially enters the space of two magnetic poles, 22 compositions and enters air gap 31; Another road is under the effect of rotor rotation, enter the

oblique air port

48,49 on the disk cover plate 50,51, enter the space of rotor field spider former 24 compositions in twos again, under the fanning action of support former 24 and supercharging former 47, air passes the air channel 20 of 21 of yokes, radially enters the space and the air gap 31 of 22 of two magnetic poles.More than two strands of air-flows form the footpath and axially be connected in parallel on air gap 31 places between rotor, form high static pressure, force air-flow to pass the stator ventilation ducts 32 of 14 of stator core segment, enter hot blast chamber 26 behind cooling stator coil and the iron core, undertaken becoming cooling blast after the heat exchange by cooler 3 then, reenter motor.The shutoff 46,37,38,25,39,16 that the stator upper and lower end parts is respectively leaked out and located, purpose are the Hot air quilt wind scoop suctions up and down in the solar heat protection air compartment 26, reflux and form cold and hot wind.

12 is last tooth support among the figure, and 15 are following tooth support.

Advantage of the present invention:

1, the total blast volume of cooling motor at first passes stator end, concentrates hot spot--rotor pole surface and the stator core pass motor then.Make the wind speed on stator and rotor coil and iron core surface improve 20%, strengthened the surperficial heat release of motor, make motor under the situation of same total blast volume, the rotor temperature reduces 10--15 ℃ more, add the adjustment of cooler, motor temperature can reduce 15--30 ℃, finally makes exerting oneself of motor unit volume improve more than 15%.

2, simplify the ventilation circuit of motor, eliminate the upper and lower end parts of motor and the trip whirlpool in the space, rotor field spider porch, make draft loss reduce by 30% than former machine, electric efficiency can improve 0.3-0.5%.

3, cancelled original motor various deep beads up and down, made the motor security of operation, repair and maintenance is convenient greatly.

4, newly-designed motor of the present invention, can lower air duct be set specially, utilize the support wall perforate air intake in upper and lower side chamber, thereby reduce the motor height that is accounted for that is provided with owing to last lower air duct, reduce the engineering excavation amount, reduced the construction cost in power station.

The present invention is as to old motor reconstruct, implements very conveniently, is on motor basic structure basis of invariable, carries out with process as follows:

1, lower air duct 1 and 2 is gone up in

fan

17,18 and corresponding

deep bead

5,6 and 10,11 cancellations about among the former machine figure of cancellation;

2, on stator upper and lower end parts support wall 7 and 8, open 35,36 among fresh air inlet such as Fig. 3;

3, utilize the screw rod up and down of former machine fan attachment, load onto down wind scoop and support 41,43, simultaneously the fixing wind scoop 42,44 that rotates up and down on the screw rod of support and fan attachment.The every utmost point of rotation wind scoop is each a slice up and down, links to each other in twos, forms full circle up and down;

4, at the outer rim place of stator end coil root, one between upper notch cushion block 45 and the last tooth support 12 circle slit and bottom notch cushion block 40 enclose the slit with one of 52 of lower ring plates, with after washing cloth rope 46,39 and filling up, and the shutoff of brush ring epoxy resins;

5, stator is gone up the slit between the tooth support 12 in twos, with pasting shutoff behind the thick terylene blanket bar epoxy resin dipping of 8-10mm;

6, one between tooth support 12 outer rims and the upper ring plate 53 encloses the slit on the stator, with washing the brush ring epoxy resins shutoff of being honored as a queen of cloth rope plug;

7, the fan-

shaped cover plate

19,23 on the former machine rotor support of cancellation.Dress disc-type bracing frame disk cover plate 50,51.The fresh air inlet of rack plate, the characteristics according to rotor field spider rotation air intake are arranged on the inner edge of rack plate, the front side of direction of rotation, form

oblique air port

48,49;

8, at rotor field spider 24 of formers in twos, install radially supercharging former 47 additional, its outer rim is close to yoke 21, is connected with disk cover plate 50,51 up and down respectively up and down;

9, hole, the garden cancel all of opening on the lower ring plate 53,52 on the stator or block;

10,, suitably increase the capacity of cooler 3, and adopt efficient low windage heat exchanger tube according to the calculating of system.

Claims

1. the ventilating system of a vertical hydrogenerator is made up of the air channel of cooler that is installed on generator unit stator outer hot blast chamber outlet end and generator inside, and it is characterized in that: generator forms corresponding air channel by following structure:

Rotor yoke (21) at generator goes up the rotation wind scoop (42,44) that composition one circle is equipped with at place, lower disc outer, and the air intake vent of wind scoop is opened in the windward side of rotor direction of rotation, forms the air inlet duct of rotor two magnetic poles (22) axial space that enters generator;

The shutoff stator upper and lower end parts hole of respectively leaking out, the stator upper and lower side of generator and top and bottom, hot blast chamber form the sealing surface that airless leaks, and cooling air is at the return air air-flow of the stator upper and lower end parts coil cooling of the paired generator of sealing surface profile;

The last lower support wall (7,8) of the stator end of generator has ventilation hole (35,36), forms the cooling blast inlet of cooler to generator;

Disk cover plate (50,51) is stamped in rotor field spider former top and bottom at generator, has oblique air port (48,49) on the cover plate, and the rotation of generator amature forms negative pressure, and cold wind sucks the rotor field spider space by oblique air port (48,49);

Between two generator rotor support formers (24), being equipped with the former space segmentation is radially supercharging former (47) of two-part dispersion shape, strengthens the fanning action of rotor field spider former (24).