CN210674574U - Automatic cleaning type filtering air inlet device of excitation engine cover - Google Patents

Abstract

The utility model discloses an automatic clearance formula of excitation aircraft bonnet filters air intake device has dustproof brush in the aspiration channel upper end, and it has 3 ~ 8 to hold in the palm the net axle sleeve to have, also can hold in the palm net side pipe and hold up the flexible steel mesh that filters. There are left and right guide shaft sleeve on left and right guide shaft layer board, steel mesh winding arbor wheel and steel mesh storage arbor wheel are equipped with drive shaft and steel mesh arbor wheel support on left and right equipment layer board, and the drive shaft of steel mesh winding arbor wheel and steel mesh storage arbor wheel other end is connected with left speed reducer and right speed reducer respectively, has inverter motor on left and right speed reducer. One end of the flexible filtering steel mesh is wound on the steel mesh storage shaft wheel, and the other end of the flexible filtering steel mesh is fixed on the steel mesh winding shaft wheel through the right guide shaft sleeve, the dustproof brush, the net supporting shaft sleeve and the left guide shaft sleeve. The equipment supporting plate is provided with a dust collector with a dust hood and a dust collection pipe, and the dust collector and the variable frequency motor work synchronously. The device is connected with an air inlet pipe. This scheme will extensively be used for the dust removal field.

Description

Automatic cleaning type filtering air inlet device of excitation engine cover

The technical field is as follows:

the utility model discloses a be used in the filter equipment that has brush excitation turbogenerator excitation aircraft bonnet upper end air intake.

Background art:

at present, the excitation carbon brushes of the brush excitation turbonator are all placed in an exciter sealing cover, and air outside the sealing cover is sucked into the exciter sealing cover through a fan on a main shaft of the generator to cool the high-temperature carbon brushes. In order to prevent impurities or other foreign matters in the air from entering the sealing cover, a filter screen is arranged at an air inlet at the upper end of the sealing cover. The carbon brush needs tens of thousands of cubic meters of air to cool the carbon brush every hour, impurities in the air of tens of thousands of cubic meters every hour can be intercepted and captured by the air inlet filter screen, an impurity barrier layer can be formed after the air works for a period of time on the filter screen with a certain area, the impurity barrier layer not only causes the sucked air to be reduced to cause the temperature of the carbon brush to rise, but also can cause the negative pressure inside the sealing cover to rise, the turbine oil in the seat bearing inside the sealing cover can be sucked out due to the rise of the negative pressure, and after the turbine oil and the conductive dust ground by the carbon brush are mixed together, conductive oil sludge is formed, so that great potential safety hazards are brought to. Because the filter screen of air intake is in the upper end of sealed cowling, the filter screen structure itself in addition, maintainer's clearance filter screen is very difficult to also insecure. Therefore, a filtering device capable of automatically cleaning a filter screen is urgently needed in the field, so that a device which brings potential safety hazards to the operation of a generator due to negative pressure is eliminated.

The invention content is as follows:

the utility model provides a technical scheme is the scheme of solving this technical problem in the present field, clears up the impurity barrier layer on the filter screen automatically, makes the unobstructed phenomenon that passes through filter screen cooling carbon brush, elimination negative pressure risees of air. The main technical characteristics are as follows: 3-8 net supporting shaft sleeves are uniformly distributed in an air suction pipeline with a guide shaft supporting plate and an equipment supporting plate fixed on the left side and the right side through a supporting sleeve shaft and a supporting sleeve shaft fixing plate, and a flexible filtering steel mesh can be supported by a net supporting square tube; the dustproof brush is fixed outside the upper end of the air suction pipeline by a handle bolt through a brush fixing frame; fixing a left guide shaft sleeve on a left guide shaft supporting plate by using a combining bolt through a guide shaft and two guide shaft supports, and fixing a right guide shaft sleeve on a right guide shaft supporting plate by using a combining bolt through the guide shaft and the two guide shaft supports; the left speed reducer with the variable frequency motor and the right speed reducer with the variable frequency motor are symmetrically fixed on equipment supporting plates on the left side and the right side of an air suction pipeline by using a combining bolt, one end of a driving shaft fixed with a steel mesh winding shaft wheel by using a connecting key is fixed on the equipment supporting plates by using the combining bolt through a steel mesh shaft wheel bracket, the other end of the driving shaft with the steel mesh winding shaft wheel is fixed at the output end of the left speed reducer, one end of the driving shaft fixed with a steel mesh storage shaft wheel by using the connecting key is fixed on the equipment supporting plates by using the combining bolt through the steel mesh shaft wheel bracket, and the other end of the driving shaft with the; winding one end of a flexible filtering steel mesh with the length of tens of meters on a steel mesh storage shaft wheel, fixing the other end of the flexible filtering steel mesh on the steel mesh winding shaft wheel through a right guide shaft sleeve, a plurality of net supporting shaft sleeves, a dustproof brush and a left guide shaft sleeve with certain pretightening force, and ensuring that the lower surface of the flexible filtering steel mesh is in good contact with the upper end of the dustproof brush and the upper surface of the net supporting shaft sleeve; the dust hood is connected with a dust collector through a dust collection pipe and is placed on the outer side of the flexible filter steel mesh, and the distance between the dust hood and the flexible filter steel mesh is 1-3 cm; fixing the air suction pipeline on the air inlet pipe flange frame of the air inlet pipe of the sealing cover by using a fastening bolt through the air suction pipe flange frame; the variable frequency motor on the left speed reducer and the variable frequency motor on the right speed reducer are controlled to work at the same speed regulation direction through a negative pressure sensor or a working time controller in the negative pressure area, meanwhile, a dust collector on the outer side of the flexible filtering steel mesh also starts to work, and the action of the steel mesh storage shaft wheel and the action of the steel mesh winding shaft wheel are mutually converted under certain conditions. Along two fixed net side pipes such as flexible filtration steel mesh direction of motion and dust removal brush height also can hold up flexible filtration steel mesh, as shown in fig. 5, fig. 6, left side direction axle sleeve and right direction axle sleeve rotate freely on the guiding axle, and a left side, right direction axle sleeve surface is less than a little and holds in the palm net axle sleeve upper surface, the pretightning force that acts on flexible filtration steel mesh must make flexible filtration steel mesh level and smooth, flexible filtration steel mesh lower surface closely with the contact of dustproof brush and hold in the palm net axle sleeve surface well, it is nimble to hold in the palm the epaxial rotation of cover in support, hold in the palm net axle sleeve and hold in the palm net side pipe and hold up flexible filtration steel mesh with different structures, prevent that high.

The utility model provides a technical scheme the technological effect who reaches is realized like this: under the action of the fan on the main shaft, air containing impurities passes through the flexible filtering steel mesh, the impurities are blocked on the flexible filtering steel mesh, and clean air enters the sealing cover to cool the carbon brush. After working for a period of time, impurity accumulation will form the impurity barrier layer at flexible filter steel mesh upper surface, when the impurity barrier layer has certain thickness, the air that passes through will reduce, but the fan rotational speed is unchangeable, at this moment will produce the negative pressure in the sealed cowling, and the negative pressure constantly increases, when negative pressure sensor in the negative pressure district sent current negative pressure value and reaches the settlement negative pressure alarm value, or flexible filter steel mesh filters operating time and arrives, when sending the alarm signal, control system just controls inverter motor syntropy speed governing rotation on left speed reducer and the right speed reducer, make steel mesh winding shaft wheel and steel mesh storage shaft wheel linear velocity unanimous, with the flexible filter steel mesh that has the impurity barrier layer remove to the left, flexible filter steel mesh winding is on the steel mesh winding wheel simultaneously. At the moment, the dust collector on the left side starts to work, the impurity blocking layer on the outer surface of the flexible filter steel mesh in the non-air flow area is sucked away through the dust hood, the flexible filter steel mesh without the impurity blocking layer is wound on the steel mesh winding shaft wheel, and the flexible filter steel mesh is prepared to be used when moving from left to right. After the flexible filter steel mesh on the right steel mesh storage arbor wheel is completely used up and wound on the steel mesh winding arbor wheel, the steel mesh storage arbor wheel just becomes steel mesh winding arbor wheel, so that the flexible filter steel mesh moves at the same linear velocity from left to right, and the dust collector on the right side starts to work. No matter the flexible filter steel mesh moves from right to left or from left to right, the moving distance is the same as the length of the air suction pipeline and then the flexible filter steel mesh stops, and the flexible filter steel mesh waits for the next negative pressure alarm signal or the signal from the working time to arrive and starts to move. When the flexible filter steel mesh stops moving, the dust collector also stops working, namely the dust collector stops working and stops synchronously with the movement and stop of the flexible filter steel mesh. The total length of the flexible filtering steel mesh and the alarm period of the moving and replacing working time can be determined according to the amount of impurities in the air, and maintenance personnel can check the filter screen in the dust collector at regular intervals. Because the impurity barrier layer on the flexible filter steel mesh is constantly removed, air can smoothly enter the seal cover under the action of the fan on the main shaft, so that the seal cover has no negative pressure exceeding an alarm value, and the turbine oil in the bearing seat can not be sucked out by ultrahigh negative pressure and mixed with carbon powder to form conductive oil sludge, thereby eliminating potential safety hazards brought to the operation of the generator.

The utility model discloses the structure is brief ingenious, and technological effect is showing, has solved the technical problem in this field perfectly, has novelty, creativity and practicality, must be widely used for brush excitation turbonator field and other relevant fields.

Description of the drawings:

FIG. 1 is a front view of an automatic cleaning and filtering air inlet device of an exciter cover

FIG. 2 is a top view of an automatic cleaning and filtering air inlet device of an exciter cover

FIG. 3A-A view of an automatic cleaning and filtering air inlet device of an exciter cover

FIG. 4 is a B-B view of an automatic cleaning and filtering air inlet device of an exciter cover

FIG. 5 is a view of a square tube of a mesh supporting device for automatically cleaning and filtering an air inlet of an exciter cover

FIG. 6 is a C-C view of an automatic cleaning and filtering air inlet device of an exciter cover

Wherein:

1. dust collector 2, dust collection pipe 3 and dust collection cover

4. Flexible filter steel mesh 5, left guide shaft sleeve 6 and guide shaft

7. Guide shaft supporting plate 8, dustproof brush 9 and brush fixing frame

10. Supporting net shaft sleeve 11, supporting sleeve shaft 12 and supporting sleeve shaft fixing plate

13. Air flow area 14, air suction pipeline 15 and right guide shaft sleeve

16. Connecting key 17, driving shaft 18 and equipment supporting plate

19. Right speed reducer 20, steel mesh storage arbor wheel 21, aspiration channel flange frame

22. Air inlet pipe flange frame 23, handle bolt 24 and air inlet pipe of sealing cover

25. Negative pressure region 26, left speed reducer 27 and steel mesh winding shaft wheel

28. Variable frequency motor 29, guide shaft bracket 30 and steel mesh shaft wheel bracket

31. Net supporting square tube

The specific implementation mode is as follows:

a brush fixing frame 9 with a dustproof brush 8 is fixed at the outer side of the upper end of an air suction pipeline 14 with an air suction pipe flange frame 21 at the lower end, guide shaft supporting plates 7 are fixed at the symmetrical left and right sides of the upper part of the air suction pipeline 14, and equipment supporting plates 18 are fixed at the symmetrical left and right sides of the lower part of the air suction pipeline 14. 3-8 net supporting shaft sleeves 10 are uniformly distributed at the upper end inside an air suction pipeline 14 through a supporting sleeve shaft fixing plate 12 and a supporting sleeve shaft 11 by using a fastening bolt 23, and the height of the upper surface of each net supporting shaft sleeve 10 is consistent with that of a dustproof hairbrush 8; instead of the net supporting shaft sleeve 10, the supporting shaft 11 and the supporting shaft fixing plate 12, two net supporting square tubes 31 may be fixed at the upper end inside the air suction pipeline 14 along the moving direction of the flexible filter steel net 4. The left guide bush 5 is fixed to the left guide bush support plate 7 by the coupling bolt 23 via the guide shaft bracket 29 and the guide shaft 6, and the right guide bush 15 is fixed to the right guide bush support plate 7 by the coupling bolt 23 via the guide shaft bracket 29 and the guide shaft 6. A steel mesh winding shaft wheel 27 is fixed on a driving shaft 17 by a connecting key 16, one end of the driving shaft 17 is fixed on a left equipment supporting plate 18 by a combining bolt 23 through a steel mesh shaft wheel bracket 30, the other end of the driving shaft 17 is connected with the output end of a left speed reducer 26, and a variable frequency motor 28 is arranged on the left speed reducer 26; a steel mesh storage shaft wheel 20 is fixed on a driving shaft 17 through a connecting key 16, one end of the driving shaft 17 is fixed on a right equipment supporting plate 18 through a steel mesh shaft wheel bracket 30 through a combining bolt 23, the other end of the driving shaft 17 is connected with the output end of a right speed reducer 19, and a variable frequency motor 28 is arranged on the right speed reducer 19. After one end of the flexible filtering steel mesh 4 with the length of tens of meters is fixed and wound on the steel mesh storage arbor wheel 20, the other end is fixed on the steel mesh winding arbor wheel 27 through the right guide axle sleeve 15, the dustproof brush 8, the net supporting axle sleeve 10 and the left guide axle sleeve 5, the upper surface of the flexible filtering steel mesh 4 is an air flowing area 13 containing impurities, and the lower surface is a negative pressure area 25 without impurities. The dust collector 1 with the dust hood 3 and the dust collection pipe 2 is placed on the left and right equipment supporting plates 18, and the dust hood 3 keeps an effective dust collection distance with the outer surface of the flexible filter steel mesh 4. The air suction pipeline 14 is fixed on the air inlet pipe flange frame 22 of the air inlet pipe 24 of the sealing cover by a fastening bolt 23 through the air suction pipe flange frame 21. All the vacuum cleaners 3 and the variable frequency motor 28 are controlled by means of a negative pressure sensor or an on-time controller in the negative pressure region 25. And (5) finishing the implementation.

Claims (1)

1. An automatic cleaning type filtering air inlet device of an excitation machine cover is characterized in that 3-8 mesh supporting shaft sleeves are uniformly distributed in an air suction pipeline, wherein a guide shaft supporting plate and an equipment supporting plate are fixed on the left side and the right side of the air suction pipeline; the dustproof brush is fixed outside the upper end of the air suction pipeline by a handle bolt through a brush fixing frame; fixing a left guide shaft sleeve on a left guide shaft supporting plate by using a combining bolt through a guide shaft and two guide shaft supports, and fixing a right guide shaft sleeve on a right guide shaft supporting plate by using a combining bolt through the guide shaft and the two guide shaft supports; the left speed reducer with the variable frequency motor and the right speed reducer with the variable frequency motor are symmetrically fixed on equipment supporting plates on the left side and the right side of an air suction pipeline by using a combining bolt, one end of a driving shaft fixed with a steel mesh winding shaft wheel by using a connecting key is fixed on the equipment supporting plates by using the combining bolt through a steel mesh shaft wheel bracket, the other end of the driving shaft with the steel mesh winding shaft wheel is fixed at the output end of the left speed reducer, one end of the driving shaft fixed with a steel mesh storage shaft wheel by using the connecting key is fixed on the equipment supporting plates by using the combining bolt through the steel mesh shaft wheel bracket, and the other end of the driving shaft with the; winding one end of a flexible filtering steel mesh with the length of tens of meters on a steel mesh storage shaft wheel, fixing the other end of the flexible filtering steel mesh on the steel mesh winding shaft wheel through a right guide shaft sleeve, a plurality of net supporting shaft sleeves, a dustproof brush and a left guide shaft sleeve with certain pretightening force, and ensuring that the lower surface of the flexible filtering steel mesh is in good contact with the upper end of the dustproof brush and the upper surface of the net supporting shaft sleeve; the dust hood is connected with a dust collector through a dust collection pipe and is placed on the outer side of the flexible filter steel mesh, and the distance between the dust hood and the flexible filter steel mesh is 1-3 cm; fixing the air suction pipeline on the air inlet pipe flange frame of the air inlet pipe of the sealing cover by using a fastening bolt through the air suction pipe flange frame; the variable frequency motor on the left speed reducer and the variable frequency motor on the right speed reducer are controlled to work at the same speed regulation direction through a negative pressure sensor or a working time controller in the negative pressure area, meanwhile, a dust collector on the outer side of the flexible filtering steel mesh also starts to work, and the action of the steel mesh storage shaft wheel and the action of the steel mesh winding shaft wheel are mutually converted under certain conditions.

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