CN110594186A - Operation monitoring method of axial flow fan with adjustable moving blades - Google Patents
Operation monitoring method of axial flow fan with adjustable moving blades Download PDFInfo
- Publication number
- CN110594186A CN110594186A CN201911041623.2A CN201911041623A CN110594186A CN 110594186 A CN110594186 A CN 110594186A CN 201911041623 A CN201911041623 A CN 201911041623A CN 110594186 A CN110594186 A CN 110594186A
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- Prior art keywords
- axial flow
- flow fan
- movable blade
- adjustable axial
- blade adjustable
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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
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an operation monitoring method of an axial flow fan with adjustable moving blades, which comprises the following steps: a. the EPLD device detects the pulse frequency output by the movable blade adjustable axial flow fan; b. the central processing unit judges whether the pulse frequency value is zero or not; c. if the pulse frequency value is zero, judging that the movable blade adjustable axial flow fan stops rotating; d. if the pulse frequency value is not zero, comparing the detected pulse frequency with a set threshold value; e. if the rotating speed of the movable blade adjustable axial flow fan is reduced as a result of the comparison, continuously counting the rotating speed abnormity of the movable blade adjustable axial flow fan, and controlling the operation of the movable blade adjustable axial flow fan by a movable blade adjustable axial flow fan control circuit after the number of times exceeds a set threshold value; f. the temperature sensor detects the temperature of the gas output by the movable blade adjustable axial flow fan; g. the central processing unit judges whether the detected temperature is higher than a preset threshold value or not, and if the detected temperature is higher than the preset threshold value, a fault alarm is started.
Description
Technical Field
The invention relates to the technical field of axial flow fans, in particular to an operation monitoring method of an axial flow fan with adjustable moving blades.
Background
The blades of the axial flow fan can be adjusted in two forms, and the static blades and the movable blades can be adjusted. The static blade is adjustable, namely the blade angle is statically adjusted after the fan stops running, and the movable blade is adjustable, namely the blade angle is dynamically adjusted during the running of the fan.
The adjustable axial-flow fan of movable vane is usually used in the higher and lower occasion of pressure requirement of flow requirement, the ventilation blower is when using for a long time, will cause the power supply high temperature of ventilation blower, if not in time dispel the heat, will damage the power supply motor on the ventilation blower, seriously influence the normal use of ventilation blower, traditional ventilation blower heat abstractor is then the louvre that enlarges on the motor itself, or increase motor body volume, and then increase the heat radiating area of motor, the heat that nevertheless the motor produced is still on the motor itself, therefore the radiating effect is not good, in order to guarantee the operational reliability of the adjustable axial-flow fan of movable vane, thereby need detect the various states of the adjustable axial-flow fan of movable vane.
Disclosure of Invention
The invention aims to provide an operation monitoring method of an axial flow fan with adjustable moving blades, aiming at the problems in the prior art.
The purpose of the invention can be realized by the following technical scheme: an operation monitoring method of an axial flow fan with an adjustable moving blade comprises the following steps: a. the EPLD device detects the pulse frequency output by the movable blade adjustable axial flow fan; b. the central processing unit judges whether the pulse frequency value is zero or not; c. if the pulse frequency value is zero, judging that the movable blade adjustable axial flow fan stops rotating; d. if the pulse frequency value is not zero, comparing the detected pulse frequency with a set threshold value; e. if the rotating speed of the movable blade adjustable axial flow fan is reduced as a result of the comparison, continuously counting the rotating speed abnormity of the movable blade adjustable axial flow fan, and controlling the operation of the movable blade adjustable axial flow fan by a movable blade adjustable axial flow fan control circuit after the number of times exceeds a set threshold value; f. the temperature sensor detects the temperature of the gas output by the movable blade adjustable axial flow fan; g. the central processing unit judges whether the detected temperature is higher than a preset threshold value or not, and if the detected temperature is higher than the preset threshold value, a fault alarm is started;
the movable blade adjustable axial flow fan comprises a fan, an EPLD device, a central processing unit, a temperature sensor and an alarm device, wherein the EPLD device is used for detecting the pulse frequency output by the fan body, the temperature sensor is used for detecting the temperature of the gas output by the fan body, the central processing unit is respectively in communication connection with the EPLD device and the temperature sensor, the central processing unit is electrically connected with the alarm device, the fan comprises a fan body, a base, a moving part and a support, the fan body is rotatably connected with the support, the fan body comprises a casing, a driving motor and a fan impeller, a mounting frame used for fixing the driving motor is arranged in the fan body, a heat dissipation device is arranged on the driving motor, and the heat dissipation device can adjust the heat dissipation effect according to the power of the driving motor.
The method of the invention forces other movable blade adjustable axial flow fans without faults to rotate at full speed after finding the fault of the movable blade adjustable axial flow fan by more comprehensively monitoring the state of the movable blade adjustable axial flow fan, thereby ensuring the operation reliability of the movable blade adjustable axial flow fan and improving the operation reliability of equipment or a system. The method is preferably realized in the EPLD device, so that the characteristic that the EPLD device has enough general input and output pins is utilized, more than four movable blade adjustable axial flow fans can be simultaneously monitored for the state, the resources of a central processing unit of equipment are not occupied, and the design is flexible; the fan can move more conveniently through the moving part, manual carrying is not needed, and time and labor are saved; through the arrangement of the heat dissipation device, the heat dissipation effect of the driving motor is improved, the shutdown caused by overheating of the driving motor is prevented, and the reliability of the driving motor is ensured; and the heat dissipation device can adjust the heat dissipation effect according to the power of the driving motor, so that when the power of the driving motor is increased, the heat dissipation device can simultaneously improve the heat dissipation effect, and the reliability of the driving motor in high-power driving is ensured.
The heat dissipation device comprises a rotating shaft, a monitoring impeller, a centrifugal fan and a heat dissipation part, wherein the rotating shaft is rotatably connected to the back side of the driving motor, the monitoring impeller is fixedly arranged at the tail end of the rotating shaft, the centrifugal fan comprises a centrifugal shell and a centrifugal impeller, the centrifugal shell is fixed to the back side of the driving motor and sleeved outside the rotating shaft, an air inlet of the centrifugal shell and the rotating shaft are coaxially arranged, an air outlet pipe of the centrifugal shell is arranged upwards, an air box is connected above the air outlet pipe, the middle part of the air box is provided with an air inlet communicated with the air outlet pipe, two sides of the air box are respectively provided with a telescopic structure, the telescopic structure comprises a first hollow telescopic pipe and a second hollow telescopic pipe, the first hollow telescopic pipe is sleeved outside the second hollow telescopic pipe, the outer ends of the first hollow telescopic pipe and the second hollow telescopic pipe are respectively provided with a heat, the first hollow telescopic pipe is arranged at the inner end part of the air box and is provided with a limiting part, the limiting part is elastically connected with the air box through a plurality of elastic pieces, the second hollow telescopic pipe is inserted into the end part of the first hollow telescopic pipe and is evenly provided with a plurality of air outlet grooves along the circumferential direction, the air outlet grooves are axially arranged along the second hollow telescopic pipe, and the air box, the first hollow telescopic pipe and the second hollow telescopic pipe are all made of heat conduction materials.
The step e is followed by the steps of: h. continuously counting faults that the movable blade adjustable axial flow fan stops rotating or the rotating speed of the movable blade adjustable axial flow fan is reduced; i; judging whether the continuous count of faults exceeds a specified value; j. and if the continuous counting number of the faults exceeds a specified value, corresponding fault processing is carried out.
In the step a, the pulse frequency is detected by the following method: counting pulse signals output by the movable blade adjustable axial flow fan within a preset time period; the pulse frequency is calculated using the following formula: and the pulse frequency value of the movable blade adjustable axial flow fan is equal to the threshold value of a pulse counter value/timer.
The step e of controlling the operation of the movable blade adjustable axial flow fan comprises the following steps: and performing fault alarm and/or enabling other movable blade adjustable axial flow fans on cooling object equipment of the movable blade adjustable axial flow fan with the fault to run at full speed.
The utility model discloses a fan impeller, including driving motor output, install bin, fan impeller, regulating shaft, driving motor output is equipped with the install bin that is used for fixed fan impeller, the regulation chamber has in the install bin, fan impeller one end is inserted to the regulation intracavity and is connected with driven bevel gear, the install bin rotates with driving motor output shaft axle center department and is connected with the regulating shaft, be provided with the initiative bevel gear with a plurality of driven bevel gear meshing simultaneously on the regulating shaft, be equipped with on the regulating shaft and be used for controlling regulating shaft pivoted control unit.
The control part comprises a control shaft, a control cavity communicated with the outside is arranged in the adjusting shaft, the control shaft can slide back and forth in the control cavity and is matched with the adjusting shaft in a rotation stopping manner, the control shaft is elastically connected with the bottom wall of the control cavity through a reset part, the reset part is used for pulling the control shaft into the control cavity, the outer end of the control shaft is provided with a pulling part, a plurality of positioning holes are uniformly formed in the outer side of the installation box along the circumferential direction of the installation box, and positioning columns matched with the positioning holes in a rotation stopping manner are arranged on two sides of the pulling part respectively.
The air inlet structure is characterized in that sealing plates for opening and closing air outlets at two ends of the casing are respectively inserted into two ends of the casing, a handle is arranged at the upper ends of the sealing plates, a holding groove is arranged in the handle, holding groove insertion parts are respectively arranged at the upper parts of two ends of the casing, and the sealing plates can be horizontally fixed to the upper part of the casing through the holding groove insertion parts to form a guide plate.
The base is also provided with a fixed part below, the fixed part comprises a plurality of telescopic support legs arranged below the base, suckers are connected below the telescopic support legs, telescopic cavities are arranged in the telescopic support legs, the telescopic support legs comprise fixed rods and telescopic rods, the telescopic rods are elastically connected with the bottom of the base through elastic reset pieces, top cylinders are connected in the fixed rods in a sliding and sealing mode, a gas storage box is arranged above the base, the telescopic support legs are respectively communicated with the gas storage box through gas guide pipes, the gas storage box is communicated with the casing close to the air outlet end through a gas inlet pipe, the movable part comprises a wheel rod and wheels, the upper end of the wheel rod can move up and down to be inserted into the base, pressing plates and supporting plates are arranged at intervals up and down at the upper end of the wheel rod, the supporting plates are used for supporting the base, gas storage cavities are arranged in the base, and the pressing plates are, the air guide pipe is communicated with the telescopic cavity through the movable cavity, one side of the movable cavity is communicated with the air storage cavity, the movable cavity is provided with a sealing plate in a sliding sealing mode, the pressing plate moves up and down in the air storage cavity to drive the air storage cavity to open and close the communication between the air guide pipe and the telescopic cavity, and the plurality of wheel rods are fixedly connected in pairs through connecting rods.
And the two adjacent radiating fins are connected through a plurality of heat conducting rubbers.
Compared with the prior art, the movable blade adjustable axial flow fan monitoring system has the advantage of more comprehensively monitoring the state of the movable blade adjustable axial flow fan.
Drawings
FIG. 1 is a flow chart of the steps of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a front view of the present invention.
Fig. 4 is a partial schematic view at a in fig. 3.
Fig. 5 is a rear view of the present invention.
Fig. 6 is a schematic view of the internal structure of the heat dissipation device of the present invention.
Fig. 7 is a schematic view of the internal structure of the mounting box of the present invention.
Fig. 8 is a schematic view showing the internal structure of the telescopic leg in the present invention.
Fig. 9 is a partial schematic view at B in fig. 8.
In the figure, 1, a fan body; 2. a base; 3. a moving member; 4. a support; 5. a housing; 6. a drive motor; 7. a fan impeller; 8. a mounting frame; 9. a rotating shaft; 10. monitoring the impeller; 11. a centrifugal fan; 111. a centrifuge housing; 112. a centrifugal impeller; 1111. an air inlet; 1112. an air outlet pipe; 12. a gas tank; 121. an air inlet; 13. a first hollow extension tube; 14. a second hollow telescopic tube; 141. an air outlet groove; 15. a heat sink; 16. a limiting part; 17. an elastic member; 18. installing a box; 181. an adjustment chamber; 19. driven bevel gears; 20. an adjustment shaft; 21. driving bevel gears; 22. a control shaft; 23. a control chamber; 24. a reset member; 25. a pulling part; 26. positioning holes; 27. a positioning column; 28. closing the plate; 29. a handle; 30. a holding groove; 31. a holding groove insertion part; 32. a telescopic leg; 321. a telescoping chamber; 322. fixing the rod; 323. a telescopic rod; 33. a suction cup; 34. a top cylinder; 35. a gas storage tank; 36. an air duct; 37. an air inlet pipe; 38. a wheel lever; 39. a wheel; 40. pressing a plate; 41. a support plate; 42. an air storage cavity; 43. a movable cavity; 44. a sealing plate; 45. a connecting rod; 46. heat conducting rubber; 47. an anti-slip portion; 3231. an elastic reset piece.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 9, an operation monitoring method for an axial flow fan with adjustable moving blades includes the following steps:
a. the EPLD device detects the pulse frequency output by the movable blade adjustable axial flow fan; b. the central processing unit judges whether the pulse frequency value is zero or not; c. if the pulse frequency value is zero, judging that the movable blade adjustable axial flow fan stops rotating; d. if the pulse frequency value is not zero, comparing the detected pulse frequency with a set threshold value; e. if the rotating speed of the movable blade adjustable axial flow fan is reduced as a result of the comparison, continuously counting the rotating speed abnormity of the movable blade adjustable axial flow fan, and controlling the operation of the movable blade adjustable axial flow fan by a movable blade adjustable axial flow fan control circuit after the number of times exceeds a set threshold value; f. the temperature sensor detects the temperature of the gas output by the movable blade adjustable axial flow fan; g. the central processing unit judges whether the detected temperature is higher than a preset threshold value or not, and if the detected temperature is higher than the preset threshold value, a fault alarm is started; h. continuously counting faults that the movable blade adjustable axial flow fan stops rotating or the rotating speed of the movable blade adjustable axial flow fan is reduced; i; judging whether the continuous count of faults exceeds a specified value; j. and if the continuous counting number of the faults exceeds a specified value, corresponding fault processing is carried out.
Preferably, the pulse frequency is detected in step a by: counting pulse signals output by the movable blade adjustable axial flow fan within a preset time period; the pulse frequency is calculated using the following formula: and the pulse frequency value of the movable blade adjustable axial flow fan is equal to the threshold value of a pulse counter value/timer.
Preferably, the step e of controlling the operation of the axial flow fan with the adjustable moving blades comprises: and performing fault alarm and/or enabling other movable blade adjustable axial flow fans on cooling object equipment of the movable blade adjustable axial flow fan with the fault to run at full speed.
Further, said in detail, the adjustable axial fan of movable vane in above-mentioned step includes the fan, the EPLD device, central processing unit, temperature sensor and alarm device, the EPLD device is used for detecting the pulse frequency of fan body output, temperature sensor is used for detecting the temperature of fan body output gas, central processing unit respectively with EPLD device and temperature sensor communication connection, central processing unit is connected with the alarm device electricity, the fan includes fan body 1, base 2, moving part 3 and support 4, fan body 1 rotates with support 4 to be connected, fan body 1 includes casing 5, driving motor 6 and fan impeller 7, be equipped with mounting bracket 8 that is used for fixed driving motor 6 in the fan body 1, be equipped with heat abstractor on driving motor 6, heat abstractor can adjust the radiating effect according to driving motor 6's power.
Preferably, the alarm device 05 adopts an audible and visual alarm, so that a better alarm effect can be still achieved in a noisy working environment, and operators can find the alarm in time.
In more detail, the heat dissipation device includes a rotation shaft 9, a monitoring impeller 10, a centrifugal fan 11 and a heat dissipation component, the rotation shaft 9 is rotatably connected to the back side of the driving motor 6, the monitoring impeller 10 is fixedly disposed at the tail end of the rotation shaft 9, the centrifugal fan 11 includes a centrifugal casing 111 and a centrifugal impeller 112, the centrifugal casing 111 is fixed at the back side of the driving motor 6 and is sleeved outside the rotation shaft 9, an air inlet 1111 of the centrifugal casing 111 is coaxially disposed with the rotation shaft 9, an air outlet pipe 1112 of the centrifugal casing 111 is disposed upward, an air box 12 is connected above the air outlet pipe 1112, an air inlet 121 communicated with the air outlet pipe 1112 is disposed in the middle of the air box 12, two sides of the air box 12 are respectively provided with a telescopic structure, the telescopic structure includes a first hollow telescopic pipe 13 and a second hollow telescopic pipe 14, the first hollow telescopic pipe 13 is sleeved outside the second hollow telescopic pipe 14, the, the radiating fins 15 are parallel to the flowing direction of the air in the fan body 1, the first hollow telescopic pipe 13 is arranged at the inner end part of the air box 12 and is provided with a limiting part 16, the limiting part 16 is elastically connected with the air box 12 through a plurality of elastic pieces 17, the second hollow telescopic pipe 14 is inserted into the end part of the first hollow telescopic pipe 13 and is uniformly provided with a plurality of air outlet grooves 141 along the circumferential direction, the air outlet grooves 141 are axially arranged along the second hollow telescopic pipe 14, and the air box 12, the first hollow telescopic pipe 13 and the second hollow telescopic pipe 14 are all made of heat conducting materials; when the driving motor 6 drives the fan impeller 7 to rotate, air enters the casing 5 from the end of the heat dissipation device and is exhausted from the other end to realize the flow of the air, when the air enters the casing 5, the monitoring impeller 10 is driven to rotate, the monitoring impeller 10 drives the centrifugal impeller 112 to rotate together through the driving rotating shaft 9, a part of the air is sucked from the air inlet 1111 by the centrifugal impeller 112 and is exhausted from the air outlet pipe 1112 and enters the air box 12 through the air inlet 121, the air pressure in the air box 12 is continuously enhanced to drive the second hollow extension pipe 14 to slide outwards, so that the heat radiating fins on the second hollow extension pipe 14 move outwards, heat is transferred to a position far away from the driving motor 6, the heat dissipation efficiency is improved, when the second hollow extension pipe 14 moves outwards to the air outlet groove 141 and the first hollow extension pipe 13 to be separated, the air in the air box 12 is exhausted through the air outlet groove 141, and the air in the air box 12 drives the heat on, therefore, the heat dissipation effect on the driving motor is improved, the air outlet groove 141 is axially arranged along the second hollow telescopic tube 14, and the opening of the air outlet groove 141 is gradually increased along with the increase of the moving distance of the second hollow telescopic tube 14, so that the passing rate of the air is increased; when the power of the driving motor 6 is increased, the air flowing speed in the casing 5 is increased to increase the rotating speed of the monitoring impeller 10, so that the rotating speed of the centrifugal impeller 112 is synchronously increased, the instantaneous air output of the air outlet pipe 1112 is increased, the pressure in the air box 12 is increased, and the air in the air box 12 cannot be discharged from the air outlet groove 141 in time, the air pressure in the air box 12 drives the first hollow extension pipe 13 to move outwards, so that the radiating fins 15 at the end part of the first hollow extension pipe 13 are driven to move outwards to be away from the driving motor 6; the distance that the fin 15 in this embodiment can freely adjust outwards to move according to the power of driving motor 6 to realize different radiating effects, and gas is from gas tank 12, second hollow flexible pipe 14 and first hollow flexible pipe 13 through taking away its inside heat in time, thereby improves the heat conduction effect to driving motor 6.
Preferably, two adjacent radiating fins 15 are connected through a plurality of heat conducting rubbers 46, when two adjacent radiating fins 15 are separated, the heat conducting rubbers 46 are stretched, the contact area between the stretched heat conducting rubbers 46 and air is increased, the heat dissipation effect is improved, and when the driving motor 6 stops working, the two adjacent radiating fins 15 are close to each other under the resetting effect of the heat conducting rubbers 46.
Preferably, the gas tank 12, the second hollow extension tube 14 and the first hollow extension tube 13 are all made of a nano aluminum alloy composite material, and the nano aluminum alloy composite material has the effects of light weight, high strength, high rigidity, high shear strength, small thermal expansion, high thermal stability, excellent electric conduction, heat conduction, wear resistance, corrosion resistance and the like.
In more detail, the output end of the driving motor 6 is provided with an installation box 18 for fixing the fan impeller 7, the installation box 18 is internally provided with an adjusting cavity 181, one end of the fan impeller 7 is inserted into the adjusting cavity 181 and is connected with a driven bevel gear 19, the installation box 18 is rotatably connected with an adjusting shaft 20 at the position of the axle center of the output shaft of the driving motor 6, the adjusting shaft 20 is provided with a driving bevel gear 21 which is meshed with the driven bevel gears 19 at the same time, the adjusting shaft 20 is provided with a control component for controlling the adjusting shaft 20 to rotate, when the angle of the fan impeller 7 needs to be adjusted, the adjusting shaft 20 and the driving bevel gear 21 are controlled to rotate by the control component, the rotation of the driven bevel gears 19 can be realized, and the angles of all blades can be adjusted, so that the performance value of the fan impeller 7 is changed, the requirement of the change of the working condition is met, the adjustment is quick, convenient, the purpose of saving working time.
In more detail, the control component comprises a control shaft 22, a control cavity 23 communicated with the outside is arranged in the adjusting shaft 20, the control shaft 22 can slide back and forth in the control cavity 23 and is in rotation-stopping fit with the adjusting shaft 20, the control shaft 22 is elastically connected with the bottom wall of the control cavity 23 through a resetting piece 24, the resetting piece 24 is used for pulling the control shaft 22 into the control cavity 23, a pulling part 25 is arranged at the outer end of the control shaft 22, a plurality of positioning holes 26 are uniformly arranged on the outer side of the installation box 18 along the circumferential direction of the installation box, and positioning columns 27 in rotation-stopping fit with the positioning holes 26 are respectively arranged on two sides of the pulling part 25; when the control component is used, the pulling part 25 is pulled outwards to draw part of the control shaft 22 out of the control cavity 23, so that the positioning column 27 and the positioning hole 26 are separated to unlock the control shaft 22, then the control shaft 22 can be controlled to rotate by rotating the pulling part 25, the adjusting shaft 20 is controlled to rotate through rotation stopping matching, when the control fan impeller 7 rotates to a required angle, the pulling part 25 is loosened to enable the positioning column 27 to be inserted into the positioning hole 26 to realize rotation stopping of the control shaft 22, so that the frequency when the installation box 18 rotates is consistent with the rotation frequency of the control shaft 22, no speed difference is generated between the control shaft and the control shaft, through the arrangement of the resetting part 24, the control shaft 22 can move into the control cavity 23 under the action of the elastic force of the resetting part 24 when the control shaft is not subjected to external force, the angle of the fan impeller 7 cannot change when the control shaft is used, and the reliability is improved.
Preferably, the return member 24 is a spring.
In more detail, sealing plates 28 for opening and closing air ports at two ends of the casing 5 are respectively inserted at two ends of the casing 5, a handle 29 is arranged at the upper end of each sealing plate 28, a holding groove 30 is arranged in each handle 29, holding groove insertion parts 31 are respectively arranged at the upper parts of the two ends of the casing 5, the sealing plates 28 can be horizontally fixed with the upper part of the casing 5 through the holding groove insertion parts 31 to form a guide plate, the sealing plates 28 can play a dustproof effect on the casing 5, dust is prevented from entering the casing 5 when the fan body 1 is not used, and the effect is ensured when the fan body; and shrouding 28 takes off the back accessible and holds groove grafting portion 31 horizontal fixation and form the guide plate with casing 5 top, has solved shrouding 28 deposit the problem, avoids losing, and the guide plate is through the form that changes casing 5 frame, improves the performance of fan, and it is more even along fan axial wind speed, has enlarged the scope of effective wind speed.
In more detail, a fixing component is further arranged below the base 2, the fixing component comprises a plurality of telescopic support legs 32 arranged below the base 2, suction cups 33 are connected below the telescopic support legs 32, telescopic cavities 321 are arranged in the telescopic support legs 32, the telescopic support legs 32 comprise fixing rods 322 and telescopic rods 323, the telescopic rods 323 are elastically connected with the bottom of the base 2 through elastic reset pieces 3231, top cylinders 34 are connected with the fixing rods 321 in a sliding and sealing mode, air storage boxes 35 are arranged above the base 2, the plurality of telescopic support legs 32 are respectively communicated with the air storage boxes 35 through air guide pipes 36, the air storage boxes 35 are communicated with the air outlet ends of the machine shell 5 close to the air outlet ends through air inlet pipes 37, the moving component 3 comprises wheel rods 38 and wheels 39, the upper ends of the wheel rods 38 can be inserted into the base 2 in an up-and down action mode, pressing plates 40 and supporting plates 41 are arranged at intervals above and below the upper ends of the wheel, the pressure plate 40 is in sealing fit with the air storage cavity 42, the air guide pipe 36 is communicated with the telescopic cavity 321 through the movable cavity 43, one side of the movable cavity 43 is communicated with the air storage cavity 42, the movable cavity 43 is provided with a sealing plate 44 in a sliding seal mode, the pressure plate 40 moves up and down in the air storage cavity 42 to drive the air storage cavity 42 to open and close the communication between the air guide pipe 36 and the telescopic cavity 321, the plurality of wheel rods 38 are fixedly connected in pairs through the connecting rods 45, when the movable blade adjustable axial flow fan moves to a proper distance, the movable blade adjustable axial flow fan can be fixed at the position through the fixing part, displacement is not easily generated in the using process, and the stability of; when in use, the air outlet side of the casing 5 is blocked by the sealing plate 28 to prevent air from being exhausted, then the driving motor 6 is started, the air pressure in the casing 5 is continuously increased, part of the air enters the air storage tank 35 through the air inlet pipe 37 and respectively enters the telescopic cavity 321 through the air duct 36 to drive the top cylinder 34 to move downwards, the top cylinder 34 continuously moves downwards after abutting against the top of the suction cup 33 to drive the telescopic rod 323 to move downwards and abut against the ground, then the top cylinder 34 continuously moves downwards to press the air in the suction cup 33 to the outside, the suction cup 33 is adsorbed on the ground under negative pressure, finally the suction cup 33 continuously ventilates after being adsorbed on the ground to drive the fixed rod 322 to move upwards to jack the base 2 upwards, after the base 2 is lifted to a required height, one of the wheel rods 38 is pulled downwards to drive the pressure plate 40 to move downwards in the air storage cavity 42 to drive the air pressure in the air storage cavity 42 to enter the movable cavity 43 to drive the sealing plate 44 to transversely slide towards the joint of the, then, the fan can work at a fixed height by opening the closing plate 28; when the fan needs to be moved, the wheel rod 38 is pushed upwards to enable the pressure plate 40 to move upwards in the air storage cavity 42, a negative pressure state is formed in the air storage cavity 42, the sealing plate 44 can be sucked away from the joint of the air guide pipe 36 and the telescopic cavity 321, the telescopic supporting feet 32 can be contracted under the pressure of the fan with the base under the condition that the telescopic cavity 321 is not continuously filled with air, and after the wheels 39 abut against the ground, the telescopic supporting feet 32 can be continuously contracted under the action of the elastic resetting piece 3231 to be separated from the ground; the fan can be fixed at different heights through the extension and retraction of the telescopic supporting feet 32, so that the applicability of the fan is expanded; in the moving process, the telescopic supporting feet 32 are telescopic to enable the suction cup 33 to be away from the ground, so that the suction cup 33 is prevented from being abraded with the ground in the moving process to influence the subsequent adsorption effect; when the blower is moved to a desired height, the sealing plate 44 is moved laterally to close the connection passage between the air duct 36 and the telescopic cavity 321, so as to prevent gas protection and ensure the height of the telescopic legs 32 to be fixed.
Preferably, the bottom of the inner wall of the suction cup 33 is provided with a non-slip part 47, when the suction cup 33 is adsorbed on a smooth surface such as a ceramic tile, the non-slip part 47 plays a non-slip role, so that the suction cup 33 is prevented from sliding relatively after being adsorbed on the smooth surface such as the ceramic tile, and the stability after being fixed is further improved; when the fan need use on rough ground such as cement, the sucking disc can't adsorb, and antiskid 47 can contradict in subaerial this moment, realizes supporting, helps avoiding sucking disc 33 to be crushed when guaranteeing the supporting effect, guarantees the life of sucking disc 33, has enlarged movable blade adjustable axial fan's suitability.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although terms are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. The operation monitoring method of the movable blade adjustable axial flow fan is characterized in that: the method comprises the following steps:
a. the EPLD device detects the pulse frequency output by the movable blade adjustable axial flow fan;
b. the central processing unit judges whether the pulse frequency value is zero or not;
c. if the pulse frequency value is zero, judging that the movable blade adjustable axial flow fan stops rotating;
d. if the pulse frequency value is not zero, comparing the detected pulse frequency with a set threshold value;
e. if the rotating speed of the movable blade adjustable axial flow fan is reduced as a result of the comparison, continuously counting the rotating speed abnormity of the movable blade adjustable axial flow fan, and controlling the operation of the movable blade adjustable axial flow fan by a movable blade adjustable axial flow fan control circuit after the number of times exceeds a set threshold value;
f. the temperature sensor detects the temperature of the gas output by the movable blade adjustable axial flow fan;
g. the central processing unit judges whether the detected temperature is higher than a preset threshold value or not, and if the detected temperature is higher than the preset threshold value, a fault alarm is started;
wherein, the movable blade adjustable axial flow fan in the above steps comprises a fan, an EPLD device, a central processing unit, a temperature sensor and an alarm device, the EPLD device is used for detecting the pulse frequency output by the fan body, the temperature sensor is used for detecting the temperature of the gas output by the fan body, the central processing unit is respectively in communication connection with the EPLD device and the temperature sensor, the central processing unit is electrically connected with the alarm device, the fan comprises a fan body (1), a base (2), a moving part (3) and a bracket (4), the fan body (1) is rotatably connected with the bracket (4), the fan body (1) comprises a casing (5), a driving motor (6) and a fan impeller (7), a mounting rack (8) for fixing the driving motor (6) is arranged in the fan body (1), and a heat dissipation device is arranged on the driving motor (6), the heat dissipation device can adjust the heat dissipation effect according to the power of the driving motor (6).
2. The operation monitoring method of the movable blade adjustable axial flow fan according to claim 1, characterized in that: the heat dissipation device comprises a rotating shaft (9), a monitoring impeller (10), a centrifugal fan (11) and a heat dissipation part, the rotating shaft (9) is rotatably connected to the back side of a driving motor (6), the monitoring impeller (10) is fixedly arranged at the tail end of the rotating shaft (9), the centrifugal fan (11) comprises a centrifugal casing (111) and a centrifugal impeller (112), the centrifugal casing (111) is fixed at the back side of the driving motor (6) and is sleeved on the outer side of the rotating shaft (9), an air inlet (1111) of the centrifugal casing (111) and the rotating shaft (9) are coaxially arranged, an air outlet pipe (1112) of the centrifugal casing (111) is upwards arranged, an air box (12) is connected above the air outlet pipe (1112), the middle part of the air box (12) is provided with an air inlet (121) communicated with the air outlet pipe (1112), two sides of the air box (12) are respectively provided with a telescopic structure, and the telescopic structure comprises a first hollow telescopic pipe (13) and a, the first hollow extension tube (13) is sleeved outside the second hollow extension tube (14), the outer ends of the first hollow extension tube (13) and the second hollow extension tube (14) are both provided with radiating fins (15), the radiating fins (15) are parallel to the flowing direction of the air in the fan body (1), the first hollow extension tube (13) is arranged at the inner end part of the air box (12) and is provided with a limit part (16), the limiting part (16) is elastically connected with the air box (12) through a plurality of elastic pieces (17), a plurality of air outlet grooves (141) are uniformly arranged at the end part of the second hollow extension pipe (14) inserted into the first hollow extension pipe (13) along the circumferential direction, the air outlet groove (141) is axially arranged along the second hollow telescopic pipe (14), and the air tank (12), the first hollow telescopic pipe (13) and the second hollow telescopic pipe (14) are all made of heat conduction materials.
3. The operation monitoring method of the movable blade adjustable axial flow fan according to claim 1, characterized in that: the step e is followed by the steps of:
h. continuously counting faults that the movable blade adjustable axial flow fan stops rotating or the rotating speed of the movable blade adjustable axial flow fan is reduced;
i. judging whether the continuous count of faults exceeds a specified value;
j. and if the continuous counting number of the faults exceeds a specified value, corresponding fault processing is carried out.
4. The operation monitoring method of the movable blade adjustable axial flow fan according to claim 1, characterized in that: in the step a, the pulse frequency is detected by the following method: counting pulse signals output by the movable blade adjustable axial flow fan within a preset time period; the pulse frequency is calculated using the following formula: and the pulse frequency value of the movable blade adjustable axial flow fan is equal to the threshold value of a pulse counter value/timer.
5. The operation monitoring method of the movable blade adjustable axial flow fan according to claim 1, characterized in that: the step e of controlling the operation of the movable blade adjustable axial flow fan comprises the following steps: and performing fault alarm and/or enabling other movable blade adjustable axial flow fans on cooling object equipment of the movable blade adjustable axial flow fan with the fault to run at full speed.
6. The operation monitoring method of the movable blade adjustable axial flow fan according to claim 2, characterized in that: the utility model discloses a fan impeller, including driving motor (6), fan impeller (7), install bin (18), regulation chamber (181) have in the install bin (18), fan impeller (7) one end is inserted and is connected with driven umbrella tooth (19) in regulation chamber (181), install bin (18) is connected with regulating spindle (20) with driving motor (6) output shaft axle center department rotation, be provided with initiative umbrella tooth (21) with a plurality of driven umbrella tooth (19) meshing simultaneously on regulating spindle (20), be equipped with on regulating spindle (20) and be used for controlling regulating spindle (20) pivoted control unit.
7. The operation monitoring method of the movable blade adjustable axial flow fan according to claim 6, characterized in that: control unit includes control shaft (22), control chamber (23) that are linked together with the outside have in regulating spindle (20), control shaft (22) can make a round trip to slide and only rotate the cooperation with regulating spindle (20) in control chamber (23), through resetting piece (24) elastic connection between control shaft (22) and control chamber (23) diapire, reset piece (24) are used for drawing control shaft (22) into in control chamber (23), control shaft (22) outer end is equipped with draws portion (25), install bin (18) outside evenly is equipped with a plurality of locating holes (26) along its circumferential direction, draw portion (25) both sides and be equipped with respectively and only rotate complex reference column (27) with locating hole (26).
8. The operation monitoring method of the movable blade adjustable axial flow fan according to claim 1, characterized in that: the air inlet device is characterized in that sealing plates (28) used for opening and closing air outlets at two ends of the casing (5) are respectively inserted into two ends of the casing (5), a handle (29) is arranged at the upper end of each sealing plate (28), a holding groove (30) is arranged in each handle (29), holding groove insertion parts (31) are respectively arranged on the upper portions of two ends of the casing (5), and the sealing plates (28) can be horizontally fixed with the upper portion of the casing (5) through the holding groove insertion parts (31) to form a guide plate.
9. The operation monitoring method of the axial flow fan with the adjustable moving blades according to claim 8, characterized in that: the base (2) below still is equipped with fixed part, fixed part is including locating a plurality of flexible stabilizer blades (32) of base (2) below, flexible stabilizer blade (32) below is connected with sucking disc (33), flexible chamber (321) have in flexible stabilizer blade (32), flexible stabilizer blade (32) include dead lever (322) and telescopic link (323), through elasticity reset piece (3231) elastic connection between telescopic link (323) and base (2) bottom, sliding seal connects with top tube (34) in dead lever (321), base (2) top is equipped with gas storage box (35), a plurality of flexible stabilizer blades (32) are linked together with gas storage box (35) through air duct (36) respectively, gas storage box (35) are close to the air-out end with casing (5) and are linked together through intake pipe (37), moving part (3) include wheel pole (38) and wheel (39), but in wheel pole (38) upper end up-and-down motion grafting and base (2), the interval is provided with clamp plate (40) and backup pad (41) from top to bottom in wheel pole (38) upper end, backup pad (41) are used for supporting base (2), air storage chamber (42) have in base (2), clamp plate (40) and air storage chamber (42) sealed cooperation, air duct (36) and flexible chamber (321) communicate through activity chamber (43), activity chamber (43) one side is linked together with air storage chamber (42), activity chamber (43) sliding seal is provided with closing plate (44), clamp plate (40) up-and-down motion is opened and close the intercommunication of air duct (36) and flexible chamber (321) with drive air storage chamber (42) in air storage chamber (42), through two liang of fixed connection of connecting rod (45) between a plurality of wheel poles (38).
10. The operation monitoring method of the movable blade adjustable axial flow fan according to claim 2, characterized in that: the adjacent two radiating fins (15) are connected through a plurality of heat conducting rubbers (46).
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| CN110594186B CN110594186B (en) | 2020-05-22 |
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| CN110594186B (en) | 2020-05-22 |
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Address after: 312300 No. 1818, Renmin West Road, Dongguan Street, Shangyu District, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Shangfeng high tech special wind industry Co.,Ltd. Address before: 312300 No. 1818 Renmin West Road, Shangyu District, Zhejiang, Shaoxing Patentee before: ZHEJIANG SHANGFENG HI-TECH SPECIALIZED WIND INDUSTRIAL Co.,Ltd. |