CN112696366A - Rotation speed self-detection anti-self-explosion axial flow fan - Google Patents
Rotation speed self-detection anti-self-explosion axial flow fan Download PDFInfo
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- CN112696366A CN112696366A CN201911007883.8A CN201911007883A CN112696366A CN 112696366 A CN112696366 A CN 112696366A CN 201911007883 A CN201911007883 A CN 201911007883A CN 112696366 A CN112696366 A CN 112696366A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/002—Axial flow fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of explosion-proof axial fans, and particularly relates to a rotation speed self-detection explosion-proof axial fan which comprises support plates, wherein the surfaces of the support plates are fixedly connected with a fan shell, the two support plates are symmetrically distributed by taking the axis of the fan shell as the center, the surfaces of the support plates are L-shaped, the surface of the fan shell is circular, the inner wall of the fan shell is fixedly connected with a fixing frame, and an explosion-proof motor is fixedly arranged on the surface of the fixing frame. This rotational speed is from detecting explosion-proof axial-flow fan, through setting up rotational speed detection device, at explosion-proof axial-flow fan during operation, when the rotational speed of pivot is too fast, the pressure grow of second function incasement portion promotes first electrical contact and second electrical contact electric connection, and first pilot lamp lights and warns, and the suggestion pivot rotational speed is too fast to the main shaft rotational speed of having solved explosion-proof axial-flow fan is too fast, arouses axial-flow fan explosion easily, has caused the problem of potential safety hazard.
Description
Technical Field
The invention relates to the technical field of explosion-proof axial flow fans, in particular to a self-detection explosion-proof axial flow fan with a rotation speed.
Background
The axial flow fan has a very wide application, namely, the axial flow fan and the fan blade have the same direction of air flow, such as an electric fan, and an air conditioner outer machine fan is an axial flow type running fan. The "axial flow" is so called because the gas flows parallel to the fan axis. Axial flow fans are typically used in applications where flow requirements are high and pressure requirements are low. The axial fan fixes the position and moves the air. The axial flow fan mainly comprises a fan impeller and a casing, and is simple in structure but high in data requirement.
The explosion-proof axial flow fan is suitable for conveying inflammable, explosive and non-corrosive gas, has an environmental temperature not exceeding 60 ℃, is widely applied to ventilation or strong heating radiation in general factories, warehouses, offices and houses, can also be installed in series in a longer exhaust pipeline at intervals to improve the pressure in the pipeline, and can be used as a free fan when a motor is dismounted. The anticorrosion axial flow fan (FT35-11 type) is processed by coating anticorrosion material with epoxy paint, and the motor adopts a special anticorrosion motor for conveying corrosive gas. Explosion-proof axial fans (model BT 35-11) for the transport of flammable and explosive gases. The method is suitable for the environment with the temperature group of T1-T4; the impeller is made of aluminum alloy to prevent sparks from being caused in operation, and the motor is an explosion-proof motor.
The rotating speed of a main shaft of an existing explosion-proof axial flow fan is controlled to be 1450r/min and 1400r/min, if the rotating speed of the main shaft is too high and the fan is used for a long time, the output shaft of a driving motor can jump radially to cause the impeller to jump radially, so that the impeller can be in contact with the inner wall of a fan cylinder, and the impeller is easy to catch fire due to friction after being in contact with the inner wall of the fan cylinder, so that the axial flow fan explodes and potential safety hazards are caused.
Disclosure of Invention
Based on the fact that the rotating speed of a main shaft of an existing explosion-proof axial flow fan is controlled to be 1450r/min and 1400r/min, if the rotating speed of the main shaft is too high, the axial flow fan is prone to explosion, and the technical problem of potential safety hazards is caused.
The invention provides a rotating speed self-detection anti-self-explosion axial flow fan which comprises supporting plates, wherein the surfaces of the supporting plates are fixedly connected with a fan shell, the two supporting plates are symmetrically distributed by taking the axis of the fan shell as the center, the surfaces of the supporting plates are L-shaped, the surface of the fan shell is circular, the inner wall of the fan shell is fixedly connected with a fixing frame, the surface of the fixing frame is fixedly provided with an anti-explosion motor, the output shaft of the anti-explosion motor is fixedly connected with a rotating shaft through a coupler, and one end of the rotating shaft is fixedly connected with an impeller;
the one end fixedly connected with mounting panel of explosion proof machine, the through-hole has been seted up to the fixed surface of mounting panel, the inner wall of through-hole cup joints with explosion proof machine's output shaft, the fixed surface of mounting panel is connected with rotation speed detection device, rotation speed detection device includes first bearing, first bearing fixed mounting is on the surface of mounting panel.
Preferably, the surface of the rotating shaft is fixedly sleeved with a driving gear, an inner ring of the first bearing is fixedly connected with a first connecting shaft, and one end of the first connecting shaft is fixedly connected with a driven gear.
Preferably, the surface of the driving gear is engaged with the surface of the driven gear, the diameter of the driving gear is the same as that of the driven gear, a first transmission gear is fixedly connected to the surface of the first connecting shaft, and the diameter of the first transmission gear is smaller than that of the driven gear.
Preferably, a second bearing is fixedly mounted on the surface of the mounting plate, a second connecting shaft is fixedly connected to an inner ring of the second bearing, a first reduction gear is fixedly connected to one end of the second connecting shaft, the surface of the first reduction gear is meshed with the surface of the first transmission gear, and the gear ratio of the first reduction gear to the first transmission gear is 1: 14.
Preferably, the surface of the second connecting shaft is fixedly connected with a second transmission gear, the surface of the mounting plate is fixedly provided with a third bearing, an inner ring of the third bearing is fixedly connected with a third connecting shaft, the surface of the third connecting shaft is fixedly connected with a second reduction gear, the surface of the second reduction gear is meshed with the surface of the second transmission gear, and the gear ratio of the second reduction gear to the second transmission gear is 1: 10.
Preferably, the fixed surface of mounting panel is connected with the fixed plate, the fixed surface of fixed plate is fixedly connected with first function case and second function case respectively, the fixed surface of first function case and second function case is connected, the fixed surface of first function case is connected with the fixed surface of mounting panel, the fixed surface of second function case is connected with the locating plate, the fixed bearing is all fixedly installed on the surface of locating plate and the surface of mounting panel, the inner circle fixedly connected with bent axle of fixed bearing, the one end fixedly connected with connecting gear of bent axle, the table of connecting gear and the surface meshing of second reduction gear, the gear ratio of connecting gear and second reduction gear is 1: 1.
Preferably, the inner wall sliding connection of first function case has first piston, the fixed surface of first piston is connected with the fixed block, the fixed surface of fixed block has seted up the turn trough, the inner wall sliding connection of turn trough has the ball that changes, the fixed surface of ball is connected with the connecting rod, the movable groove has been seted up to the fixed surface of first function case, the one end of connecting rod extends to the surface of first function case through the movable groove, the one end of connecting rod is articulated with the surface of bent axle.
Preferably, the fixed intercommunication of the interior roof of first function case has the intake pipe, the one end of intake pipe runs through and extends to the surface of fixed plate, the inner wall of intake pipe is the first solid fixed ring of fixedly connected with and first sealing ring respectively, the first fixed ring's fixed surface is connected with first spring, the first ball sealer of one end fixedly connected with of first spring, the surface of first ball sealer is pegged graft with the inner wall of first sealing ring.
Preferably, the fixed intercommunication of inner wall of first function case has the control tube, the one end of control tube runs through and extends to the inner wall of second function case, the inner wall of control tube is the solid fixed ring of fixedly connected with second and second sealing ring respectively, the solid fixed surface of the solid fixed ring of second is connected with the second spring, the one end fixedly connected with second ball sealer of second spring, the inner wall of second ball sealer is pegged graft with the inner wall of second sealing ring, the inner wall of second function case is fixed and has been seted up the exhaust hole, the one end in exhaust hole runs through and extends to the surface of second function case.
Preferably, a second piston is fixedly connected to the inner wall of the second function box in a sliding manner, a third spring is fixedly connected to the lower surface of the second piston, one end of the third spring is fixedly connected to the inner bottom wall of the second function box, a first electrical contact and a second electrical contact are fixedly mounted on the lower surface of the second piston and the inner bottom wall of the second function box respectively, a third electrical contact is fixedly mounted on the inner wall of the second function box, the surface of the third electrical contact is in a circular ring shape, a fourth electrical contact is fixedly mounted on the upper surface of the second piston, the surface of the fourth electrical contact is in a cylindrical shape, the surface of the fourth electrical contact is matched with the inner wall of the third electrical contact, a threading pipe is fixedly connected to the inner wall of the second function box, one end of the threading pipe penetrates and extends to the surface of the blower housing, and a first indicator light and a second indicator light are fixedly mounted on the surface of the blower housing respectively, the first indicator light is electrically connected with the first electric contact and the second electric contact through electric wires respectively, and the second indicator light is electrically connected with the third electric contact and the fourth electric contact through electric wires respectively.
The beneficial effects of the invention are as follows:
1. through setting up rotational speed detection device, at explosion-proof axial fan during operation, when the rotational speed of pivot was too fast, the pressure grow of second function incasement portion promoted first electric contact and second electric contact electric connection, and first pilot lamp lights and warns, and the suggestion pivot rotational speed is too fast to the main shaft rotational speed of having solved explosion-proof axial fan is too fast, arouses axial fan explosion easily, has caused the problem of potential safety hazard.
Drawings
Fig. 1 is a schematic view of a rotational speed self-detecting anti-self-explosion axial flow fan provided by the present invention;
fig. 2 is a sectional view of a fan casing structure of a rotational speed self-detection self-explosion-proof axial flow fan provided by the invention;
fig. 3 is a sectional view of a fan casing structure of a rotational speed self-detection self-explosion-proof axial flow fan according to the present invention;
fig. 4 is an enlarged view of a structure at a position a in fig. 3 of the rotational speed self-detection self-explosion-proof axial flow fan provided by the present invention;
fig. 5 is a structural sectional view of a first functional box of the rotational speed self-detection self-explosion-proof axial flow fan provided by the invention;
fig. 6 is a perspective view of a first piston structure of the rotational speed self-detecting anti-self-explosion axial flow fan according to the present invention.
In the figure: 1. a support plate; 2. a fan housing; 3. a fixed mount; 4. an explosion-proof motor; 5. a rotating shaft; 6. an impeller; 7. mounting a plate; 8. a through hole; 9. a first bearing; 10. a driving gear; 11. a first connecting shaft; 12. a driven gear; 13. a first drive gear; 14. a second bearing; 15. a second connecting shaft; 16. a first reduction gear; 17. a second transmission gear; 18. a third bearing; 19. a third connecting shaft; 20. a second reduction gear; 21. a fixing plate; 22. a first functional box; 23. a second functional box; 24. positioning a plate; 25. fixing the bearing; 26. a crankshaft; 27. a connecting gear; 28. a first piston; 29. a fixed block; 30. rotating the groove; 31. rotating the ball; 32. a connecting rod; 33. a movable groove; 34. an air inlet pipe; 35. a first retaining ring; 36. a first seal ring; 37. a first spring; 38. a first sealing ball; 39. a control tube; 40. a second retaining ring; 41. a second spring; 42. a second sealing ball; 43. an exhaust hole; 44. a second piston; 45. a third spring; 46. a first electrical contact; 47. a second electrical contact; 48. a third electrical contact; 49. a fourth electrical contact; 50. a first indicator light; 51. and a second indicator light.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-6, a rotational speed self-detecting anti-self-explosion axial flow fan, as shown in fig. 1-3, includes support plates 1, the surface of the support plate 1 is fixedly connected with a fan housing 2, the two support plates 1 are symmetrically distributed with the axis of the fan housing 2 as the center, the surface of the support plate 1 is in an L shape, the surface of the fan housing 2 is in a circular shape, the inner wall of the fan housing 2 is fixedly connected with a fixed mount 3, the surface of the fixed mount 3 is fixedly provided with an anti-explosion motor 4, the output shaft of the anti-explosion motor 4 is fixedly connected with a rotating shaft 5 through a coupling, and one end of the rotating;
one end of the explosion-proof motor 4 is fixedly connected with a mounting plate 7, a through hole 8 is fixedly formed in the surface of the mounting plate 7, the inner wall of the through hole 8 is sleeved with an output shaft of the explosion-proof motor 4, the surface of the mounting plate 7 is fixedly connected with a rotating speed detection device, the rotating speed detection device comprises a first bearing 9, and the first bearing 9 is fixedly mounted on the surface of the mounting plate 7;
as shown in fig. 4, a driving gear 10 is fixedly sleeved on the surface of a rotating shaft 5, a first connecting shaft 11 is fixedly connected to the inner ring of a first bearing 9, a driven gear 12 is fixedly connected to one end of the first connecting shaft 11, the surface of the driving gear 10 is meshed with the surface of the driven gear 12, the diameter of the driving gear 10 is the same as that of the driven gear 12, a first transmission gear 13 is fixedly connected to the surface of the first connecting shaft 11, the diameter of the first transmission gear 13 is smaller than that of the driven gear 12, a second bearing 14 is fixedly installed on the surface of a mounting plate 7, a second connecting shaft 15 is fixedly connected to the inner ring of the second bearing 14, a first reduction gear 16 is fixedly connected to one end of the second connecting shaft 15, the surface of the first reduction gear 16 is meshed with the surface of the first transmission gear 13, the gear ratio of the first reduction gear 16 to the first transmission gear 13 is 1:14, a second transmission gear 17 is fixedly, a third bearing 18 is fixedly mounted on the surface of the mounting plate 7, a third connecting shaft 19 is fixedly connected to the inner ring of the third bearing 18, a second reduction gear 20 is fixedly connected to the surface of the third connecting shaft 19, the surface of the second reduction gear 20 is meshed with the surface of the second transmission gear 17, and the gear ratio of the second reduction gear 20 to the second transmission gear 17 is 1: 10;
as shown in fig. 4-6, a fixed plate 21 is fixedly connected to the surface of the mounting plate 7, a first function box 22 and a second function box 23 are fixedly connected to the surface of the fixed plate 21, respectively, the surfaces of the first function box 22 and the second function box 23 are fixedly connected, the surface of the first function box 22 is fixedly connected to the surface of the mounting plate 7, the surface of the second function box 23 is fixedly connected to a positioning plate 24, a fixed bearing 25 is fixedly mounted to both the surface of the positioning plate 24 and the surface of the mounting plate 7, a crankshaft 26 is fixedly connected to the inner ring of the fixed bearing 25, a connecting gear 27 is fixedly connected to one end of the crankshaft 26, the surface of the connecting gear 27 is engaged with the surface of the second reduction gear 20, the gear ratio of the connecting gear 27 to the second reduction gear 20 is 1:1, a first piston 28 is slidably connected to the inner wall of the first function box 22, a fixed block 29 is fixedly, a rotating groove 30 is fixedly formed in the surface of the fixing block 29, a rotating ball 31 is connected to the inner wall of the rotating groove 30 in a sliding mode, a connecting rod 32 is fixedly connected to the surface of the rotating ball 31, a movable groove 33 is fixedly formed in the surface of the first function box 22, one end of the connecting rod 32 extends to the surface of the first function box 22 through the movable groove 33, and one end of the connecting rod 32 is hinged to the surface of the crankshaft 26;
as shown in fig. 5, an air inlet pipe 34 is fixedly communicated with an inner top wall of the first functional box 22, one end of the air inlet pipe 34 penetrates through and extends to the surface of the fixing plate 21, a first fixing ring 35 and a first sealing ring 36 are fixedly connected to the inner wall of the air inlet pipe 34 respectively, a first spring 37 is fixedly connected to the surface of the first fixing ring 35, a first sealing ball 38 is fixedly connected to one end of the first spring 37, and the surface of the first sealing ball 38 is inserted into the inner wall of the first sealing ring 36;
as shown in fig. 5, a control tube 39 is fixedly communicated with the inner wall of the first function box 22, one end of the control tube 39 penetrates through and extends to the inner wall of the second function box 23, a second fixing ring 40 and a second sealing ring are respectively fixedly connected to the inner wall of the control tube 39, a second spring 41 is fixedly connected to the surface of the second fixing ring 40, a second sealing ball 42 is fixedly connected to one end of the second spring 41, the inner wall of the second sealing ball 42 is inserted into the inner wall of the second sealing ring, an exhaust hole 43 is fixedly formed in the inner wall of the second function box 23, and one end of the exhaust hole 43 penetrates through and extends to the surface of the second function box 23;
as shown in fig. 5, a second piston 44 is fixedly connected to an inner wall of the second function box 23 in a sliding manner, a third spring 45 is fixedly connected to a lower surface of the second piston 44, one end of the third spring 45 is fixedly connected to an inner bottom wall of the second function box 23, a first electrical contact 46 and a second electrical contact 47 are fixedly mounted on a lower surface of the second piston 44 and the inner bottom wall of the second function box 23, a third electrical contact 48 is fixedly mounted on an inner wall of the second function box 23, a surface of the third electrical contact 48 is in a circular ring shape, a fourth electrical contact 49 is fixedly mounted on an upper surface of the second piston 44, a surface of the fourth electrical contact 49 is in a cylindrical shape, a surface of the fourth electrical contact 49 is matched with an inner wall of the third electrical contact 48, a threading pipe is fixedly connected to the inner wall of the second function box 23, one end of the threading pipe penetrates and extends to a surface of the blower housing 2, a first indicator lamp 50 and a second indicator lamp 51 are fixedly mounted on a surface of the blower housing 2, the first indicator light 50 is electrically connected with the first electrical contact 46 and the second electrical contact 47 through wires, and the second indicator light 51 is electrically connected with the third electrical contact 48 and the fourth electrical contact 49 through wires;
through setting up rotational speed detection device, at explosion-proof axial fan during operation, when the rotational speed of pivot 5 was too fast, the inside pressure grow of second function case 23 promoted first electrical contact 46 and 47 electric connection of second electrical contact, and first pilot lamp 50 lights and warns, and the suggestion 5 rotational speeds of pivot are too fast to the main shaft rotational speed of having solved explosion-proof axial fan is too fast, arouses axial fan explosion easily, has caused the problem of potential safety hazard.
The working principle is as follows: when the explosion-proof motor works, an output shaft of the explosion-proof motor 4 drives a rotating shaft 5 and an impeller 6 to rotate through a coupler, the rotating shaft 5 drives a driving gear 10 to rotate, the driving gear 10 drives a driven gear 12 to rotate, the diameter of the driving gear 10 is consistent with that of the driven gear 12, one rotation of the driving gear 10 drives the driven gear 12 to rotate for one rotation, the driven gear 12 drives a first connecting shaft 11 to rotate for one rotation, the first connecting shaft 11 drives a first transmission gear 13 to rotate for one rotation, the first transmission gear 13 rotates for fourteen turns to drive a first reduction gear 16 and a second connecting shaft 15 to rotate for one rotation, one rotation of the second connecting shaft 15 drives a second transmission gear 17 to rotate for one rotation, ten rotations of the second transmission gear 17 drives a second reduction gear 20 and a third connecting shaft 19 to rotate for one rotation, and one rotation of the;
when the rotating speed of the rotating shaft 5 is 1400r/min, the rotating shaft 5 rotates for one minute, the crankshaft 26 rotates for ten cycles, the crankshaft 26 rotates to drive the connecting rod 32 to move, the connecting rod 32 drives the first piston 28 to move up and down ten times, the first piston 28 moves up and down once in the first function box 22, the first piston 28 moves up to push and extrude the air in the first function box 22, the air in the first function box 22 is pushed to push the second sealing ball 42 to separate from the second sealing ring, the air enters the second function box 23 through the control tube 39, when the first piston 28 moves down, negative pressure is generated in the first function box 22 to drive the first sealing ball 38 to separate from the first sealing ring 36, the external air enters the first function box 22 through the air inlet tube 34, when the internal air pressure of the first function box 22 is consistent with the external air pressure, the first sealing ball 38 is inserted and sealed with the first sealing ring 36 under the action force of the first spring 37, meanwhile, air enters the inside of the second functional box 23 to push the second piston 44 to move downwards, the second piston 44 drives the fourth electrical contact 49 to be separated from the third electrical contact 48, and the air in the inside of the second functional box 23 is slowly exhausted through the exhaust hole 43 under the acting force of the third spring 45 and the second piston 44;
if the rotating speed of the rotating shaft 5 is too high, the air in the first functional box 22 entering the second functional box 23 is increased, the air pressure in the second functional box 23 is increased, the second piston 44 is pushed to move downwards to drive the first electric contact 46 and the second electric contact 47 to be electrically connected, and the first indicator lamp 50 is turned on to warn after the first electric contact 46 and the second electric contact 47 are electrically connected;
if the rotation speed of the rotating shaft 5 is too low, the air entering the second functional box 23 from the air inside the first functional box 22 decreases, the air pressure inside the second functional box 23 decreases, the third spring 45 pushes the second piston 44 to move upwards, the fourth electrical contact 49 is electrically connected with the third electrical contact 48, and the second indicator light 51 lights up to give an alarm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a rotational speed self test is explosion-proof axial fan, includes backup pad (1), its characterized in that: the surface of each supporting plate (1) is fixedly connected with a fan shell (2), the two supporting plates (1) are symmetrically distributed by taking the axis of the fan shell (2) as the center, the surface of each supporting plate (1) is L-shaped, the surface of each fan shell (2) is round, the inner wall of each fan shell (2) is fixedly connected with a fixing frame (3), the surface of each fixing frame (3) is fixedly provided with an explosion-proof motor (4), the output shaft of each explosion-proof motor (4) is fixedly connected with a rotating shaft (5) through a coupler, and one end of each rotating shaft (5) is fixedly connected with an impeller (6);
the one end fixedly connected with mounting panel (7) of explosion-proof machine (4), through-hole (8) have been seted up to the fixed surface of mounting panel (7), the inner wall of through-hole (8) cup joints with the output shaft of explosion-proof machine (4), the fixed surface of mounting panel (7) is connected with rotational speed detection device, rotational speed detection device includes first bearing (9), first bearing (9) fixed mounting is on the surface of mounting panel (7).
2. The rotational speed self-detecting anti-self-explosion axial flow fan according to claim 1, characterized in that: the surface of the rotating shaft (5) is fixedly sleeved with a driving gear (10), the inner ring of the first bearing (9) is fixedly connected with a first connecting shaft (11), and one end of the first connecting shaft (11) is fixedly connected with a driven gear (12).
3. The rotational speed self-detecting anti-self-explosion axial flow fan according to claim 2, characterized in that: the surface of the driving gear (10) is meshed with the surface of the driven gear (12), the diameter of the driving gear (10) is the same as that of the driven gear (12), a first transmission gear (13) is fixedly connected to the surface of the first connecting shaft (11), and the diameter of the first transmission gear (13) is smaller than that of the driven gear (12).
4. The rotational speed self-detecting anti-self-explosion axial flow fan according to claim 3, characterized in that: the surface of the mounting plate (7) is fixedly provided with a second bearing (14), an inner ring of the second bearing (14) is fixedly connected with a second connecting shaft (15), one end of the second connecting shaft (15) is fixedly connected with a first reduction gear (16), the surface of the first reduction gear (16) is meshed with the surface of the first transmission gear (13), and the gear ratio of the first reduction gear (16) to the first transmission gear (13) is 1: 14.
5. The rotational speed self-detecting anti-self-explosion axial flow fan according to claim 4, characterized in that: the surface of the second connecting shaft (15) is fixedly connected with a second transmission gear (17), the surface of the mounting plate (7) is fixedly provided with a third bearing (18), an inner ring of the third bearing (18) is fixedly connected with a third connecting shaft (19), the surface of the third connecting shaft (19) is fixedly connected with a second reduction gear (20), the surface of the second reduction gear (20) is meshed with the surface of the second transmission gear (17), and the gear ratio of the second reduction gear (20) to the second transmission gear (17) is 1: 10.
6. The rotational speed self-detecting anti-self-explosion axial flow fan according to claim 5, characterized in that: the surface of the mounting plate (7) is fixedly connected with a fixing plate (21), the surface of the fixing plate (21) is fixedly connected with a first functional box (22) and a second functional box (23) respectively, the surfaces of the first functional box (22) and the second functional box (23) are fixedly connected, the surface of the first functional box (22) is fixedly connected with the surface of the mounting plate (7), the surface of the second functional box (23) is fixedly connected with a positioning plate (24), the surface of the positioning plate (24) and the surface of the mounting plate (7) are both fixedly provided with a fixed bearing (25), the inner ring of the fixed bearing (25) is fixedly connected with a crankshaft (26), one end of the crankshaft (26) is fixedly connected with a connecting gear (27), the surface of the connecting gear (27) is meshed with the surface of the second reduction gear (20), the gear ratio of the connecting gear (27) to the second reduction gear (20) is 1: 1.
7. The rotational speed self-detecting anti-self-explosion axial flow fan according to claim 6, characterized in that: the inner wall sliding connection of first function case (22) has first piston (28), the fixed surface of first piston (28) is connected with fixed block (29), rotary groove (30) have been seted up to the fixed surface of fixed block (29), the inner wall sliding connection of rotary groove (30) has changes ball (31), the fixed surface of changing ball (31) is connected with connecting rod (32), movable groove (33) have been seted up to the fixed surface of first function case (22), the surface that extends to first function case (22) is passed through movable groove (33) to the one end of connecting rod (32), the one end of connecting rod (32) is articulated with the surface of bent axle (26).
8. The rotational speed self-detecting anti-self-explosion axial flow fan according to claim 7, characterized in that: the fixed intercommunication of the interior roof of first function case (22) has intake pipe (34), the one end of intake pipe (34) runs through and extends to the surface of fixed plate (21), the inner wall of intake pipe (34) is the first solid fixed ring of fixedly connected with (35) and first sealing ring (36) respectively, the fixed surface of first solid fixed ring (35) is connected with first spring (37), the first ball sealer (38) of one end fixedly connected with of first spring (37), the surface of first ball sealer (38) is pegged graft with the inner wall of first sealing ring (36).
9. The axial flow fan with the rotation speed self-detection and the self-explosion prevention functions as claimed in claim 8, wherein: the fixed intercommunication of inner wall of first function case (22) has control tube (39), the one end of control tube (39) runs through and extends to the inner wall of second function case (23), the inner wall difference fixedly connected with second of control tube (39) is the solid fixed ring of (40) and the second sealing ring, the fixed surface of second solid fixed ring (40) is connected with second spring (41), the one end fixedly connected with second ball sealer (42) of second spring (41), the inner wall of second ball sealer (42) is pegged graft with the inner wall of second sealing ring, exhaust hole (43) have been seted up to the fixed inner wall of second function case (23), the one end of exhaust hole (43) runs through and extends to the surface of second function case (23).
10. The axial flow fan with the rotation speed self-detection and the self-explosion prevention functions as claimed in claim 9, wherein: a second piston (44) is fixedly connected to the inner wall of the second function box (23) in a sliding manner, a third spring (45) is fixedly connected to the lower surface of the second piston (44), one end of the third spring (45) is fixedly connected to the inner bottom wall of the second function box (23), a first electric contact (46) and a second electric contact (47) are respectively and fixedly mounted on the lower surface of the second piston (44) and the inner bottom wall of the second function box (23), a third electric contact (48) is fixedly mounted on the inner wall of the second function box (23), the surface of the third electric contact (48) is in a circular ring shape, a fourth electric contact (49) is fixedly mounted on the upper surface of the second piston (44), the surface of the fourth electric contact (49) is in a cylindrical shape, and the surface of the fourth electric contact (49) is matched with the inner wall of the third electric contact (48), the inner wall fixedly connected with threading pipe of second function case (23), the one end of threading pipe runs through and extends to the surface of fan shell (2), the surface of fan shell (2) is fixed mounting respectively has first pilot lamp (50) and second pilot lamp (51), first pilot lamp (50) pass through the electric wire respectively with first electrical contact (46) and second electrical contact (47) electric connection, second pilot lamp (51) pass through the electric wire respectively with third electrical contact (48) and fourth electrical contact (49) electric connection.
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| CN113217434A (en) * | 2021-06-10 | 2021-08-06 | 深圳市缚火龙机电实业有限公司 | Explosion-proof fire-fighting fan |
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