CN215772844U - Ventilation and heat dissipation system for collector ring of generator - Google Patents

Abstract

The utility model relates to a ventilation and heat dissipation system for a collector ring of a generator. At present, because the air outlet of the collecting ring chamber is led outdoors, in order to prevent sundries and small animals from entering, a layer of stainless steel filter screen is arranged at the air outlet, and the filter screen is easily blocked due to outdoor sand wind. A ventilation and heat dissipation system for a generator collecting ring comprises: can dismantle filter screen (1), ventilation shutter (2), fan (3), air inlet duct (4) and air-out wind channel (5), the air inlet duct is connected with the fan, the fan is connected with the air-out wind channel, the ventilation shutter is installed to slant 30 degrees down in the wind channel of the outdoor department in air-out wind channel, install in the wind channel of the indoor department in air-out wind channel and to dismantle the filter screen, the position department of cuting in air-out wind channel installs track (6) for fixing, be connected with through the hasp mode in the track for fixing and can dismantle the filter screen. The method is applied to the technical field of basic engineering.

Description

Ventilation and heat dissipation system for collector ring of generator

Technical Field

The utility model relates to a ventilation and heat dissipation system for a collector ring of a generator.

Background

The electric generator of the elm transverse power plant is a 660MW water-hydrogen-cooled electric generator manufactured by the eastern electrical machinery plant, and a collecting ring system of the electric generator utilizes an excitation seal nut as an air inlet channel, and a special air outlet channel is led to the outside. The air inlet is opened on 7.1m platform, on the excitation seal mother of generator foundation roof beam below, sets up 1 air inlet of 2560 1130, installs 10 blocks of 500 double-deck area filter pulp stainless steel filter screens of crossing.

Cooling air enters the excitation seal mother air duct from the air inlet of 7.1 meters into the collector ring chamber, passes through the cooling air duct on the collector ring under the action of the cooling air duct in the collector ring chamber, is discharged to the air outlet, and is led to the outside through the air outlet duct. The cooling air has three main functions:

(1) carbon powder abraded by the carbon brush is cleaned and blown to the outside, so that the collector ring or the carbon brush is prevented from being grounded through the carbon powder due to the fact that the carbon powder is gathered on the insulating plate, and the rotor is prevented from being grounded.

(2) The collector ring or the brush holder is cooled, and the collector ring is prevented from being over-heated.

(3) The cooling air filter screen filters the cooling air, and prevents dust from entering the collecting ring chamber and damaging the collecting ring.

Because the air outlet of the collecting ring chamber is led to the outside, in order to prevent sundries and small animals from entering, the air outlet is provided with a layer of stainless steel filter screen, and because the outdoor wind sand is large, and in addition, the air outlet is provided with carbon powder to be discharged, the carbon powder and sand soil are stuck on the filter screen when meeting the wet weather of rain, snow and the like, the filter screen is blocked after a long time, and the ventilation capability is reduced. The environment temperature of the peak-facing degree in summer is high, the load of a unit is high, the reactive power is high, the exciting current is large (about 4000A), the temperature of a collector ring and a brush holder is high, the highest temperature is 100-100 ℃, the maximum temperature is close to the limit value of 120 ℃, the expansion amount of a carbon brush can be increased due to overhigh temperature, the possibility that the carbon brush is clamped in the brush holder is increased, the characteristic of the carbon brush can be changed due to overhigh temperature, the resistance and the contact resistance of the carbon brush can be increased, the heating is serious, vicious circle is caused, the surface of the collector ring can be discolored due to overhigh temperature, the conductivity of the collector ring is changed, the collector ring is easily ignited, and the collector ring can be seriously burnt. The safe and stable operation of the unit is seriously influenced, the unit is not stopped, and huge economic loss is brought.

Disclosure of Invention

The utility model aims to provide a ventilation and heat dissipation system for a collector ring of a generator, so as to prevent an air outlet duct of the collector ring from being blocked and solve the problem of high temperature of the collector ring.

The above purpose is realized by the following technical scheme:

a ventilation and heat dissipation system for a generator collecting ring comprises: can dismantle filter screen, ventilation shutter, fan, air inlet duct and air-out wind channel, the air inlet duct with the fan connect, the fan with the air-out wind channel connect, the wind channel of outdoor department in air-out wind channel in the slant 30 degrees down install ventilation shutter, the wind channel of indoor department in air-out wind channel in install and to dismantle the filter screen, the position department that cuts in air-out wind channel install fixed track of using, fixed track of using in be connected with through the hasp mode can dismantle the filter screen.

The generator is ventilation cooling system for collecting ring, the filter screen that can dismantle adopt the stainless steel filter screen, the bracket and the air outlet duct side of dismantling the filter screen be connected.

The ventilation and heat dissipation system for the generator collecting ring is characterized in that 5-6 round holes are formed in the louver of the ventilation louver.

The utility model has the beneficial effects that:

1. the utility model optimizes the collector ring ventilation system of the generator, effectively improves the working condition of the collector ring ventilation system, improves the running reliability of the collector ring of the generator and simultaneously provides safety guarantee for the long-period running of the generator.

According to the utility model, the original stainless steel wire protective net is replaced by the aluminum alloy perforated shutter at the outdoor part of the air outlet, so that the ventilation air quantity of the air outlet is increased, the air outlet cannot be blocked, and the temperature of the collecting ring is reduced by about 10 ℃.

According to the utility model, the stainless steel wire protective net capable of being replaced online is additionally arranged at the indoor air outlet, the filter net can be checked and cleaned periodically in the operation process of the equipment, the work of ascending a height and the work of erecting a scaffold are avoided, and the maintenance cost of the equipment is reduced.

The design of the louver with the holes and the steel wire gauze can more reliably prevent external small animals and sand dust from entering the inside of the collecting ring, improve the running environment of the collecting ring and ensure the safe and reliable running of the collecting ring.

Description of the drawings:

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of the connection between a ventilation louver and an air outlet duct;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a schematic structural view of a fixing rail;

FIG. 5 is a schematic illustration of a removable screen;

FIG. 6 is a schematic view of an original slip ring ventilation and heat dissipation system;

FIG. 7 is a schematic structural view of the original outer screen of FIG. 6;

in the figure: 1. can dismantle filter screen, 2, ventilation shutter, 3, fan, 4, air inlet duct, 5, air outlet duct, 6, fixed track, 7, round hole, 8, former outer filter screen.

The specific implementation mode is as follows:

example 1:

a ventilation and heat dissipation system for a generator collecting ring comprises: can dismantle filter screen 1, ventilation shutter 2, fan 3, air inlet duct 4 and air outlet duct 5, the air inlet duct with the fan connect, the fan with the air outlet duct connect, the wind channel of outdoor department in the air-out duct in the slant 30 degrees down install ventilation shutter, the wind channel of indoor department in air outlet duct in install and to dismantle the filter screen, the position department of cutting in air outlet duct install fixed track 6 of using, fixed track for use in be connected with through the hasp mode can dismantle the filter screen.

Example 2:

according to embodiment 1 ventilation cooling system for generator collecting ring, the filter screen that can dismantle adopt the stainless steel filter screen, the bracket of the filter screen that can dismantle be connected with air outlet duct side. The stainless steel filter screen bracket adopts a mode of being installed on the side face of the air duct, the bracket of the filter screen is fixed with the air outlet air duct by adopting a lock catch, the site disassembly and assembly are convenient, the periphery of the filter screen is welded with a stainless steel edge strip, and a rubber sealing gasket is wrapped outside the edge strip.

Example 3:

according to the ventilation and heat dissipation system for the generator collecting ring in the embodiment 1 or 2, 5 to 6 circular holes 7 are formed in the louver of the ventilation louver. (can adjust according to actual conditions), both guaranteed the stability of shutter like this, do not influence the air volume in air-out wind channel again, can also effectual resistance outside foreign matter get into.

Example 4:

cutting off a part of the original air outlet duct chamber 30cm away from a wall body, welding flanges on two sides of the cut-off part, wherein the size of the flange is manufactured according to the size of an installation flange of an outdoor filter screen of the original air outlet duct, and manufacturing a rubber sealing gasket according to the size of the flange;

example 5:

a fixing rail (double rails) for mounting the indoor detachable filter screen is mounted at the cut-off position of the air outlet duct, and the indoor air outlet duct, the filter screen mounting and fixing rail and the outdoor air outlet duct are firmly connected;

the detachable filter screen is installed in a special track for installing the filter screen, and the lock catch is well buckled;

replacing a stainless steel filter screen at the outlet of an air outlet duct of the original room with a ventilation shutter;

and (4) checking that the ventilation and heat dissipation system is connected, checking that all parts are normal, and fastening by screws.

Claims (3)

1. A ventilation and heat dissipation system for a generator collecting ring comprises: can dismantle filter screen, ventilation shutter, fan, air inlet duct and air-out wind channel, characterized by: the air inlet wind channel with the fan connect, the fan with the air-out wind channel connect, the wind channel of outdoor department in air-out wind channel in the slant 30 degrees down install the ventilation shutter, the wind channel of indoor department in air-out wind channel in install and to dismantle the filter screen, the position department of cutting in air-out wind channel install fixed track of using, fixed track of using in be connected with through the hasp mode can dismantle the filter screen.

2. The ventilation and heat dissipation system for the generator collecting ring as claimed in claim 1, wherein: the detachable filter screen adopts a stainless steel filter screen, and the bracket of the detachable filter screen is connected with the side face of the air outlet duct.

3. The ventilation and heat dissipation system for the generator collecting ring as claimed in claim 1, wherein: 5-6 round holes are arranged on the louver blades of the ventilation louver.

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