CN113464474A

CN113464474A - Direct current jet fan for tunnel

Info

Publication number: CN113464474A
Application number: CN202110935299.XA
Authority: CN
Inventors: 董梁峰; 董钺
Original assignee: Zhejiang Hanfeng Fans Co ltd
Current assignee: Zhejiang Hanfeng Fans Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2021-10-01
Anticipated expiration: 2041-08-16
Also published as: CN113464474B

Abstract

The invention belongs to the field of tunnel fans, and particularly relates to a direct-current jet fan for a tunnel, which comprises a wind cylinder, a nozzle module, a direct-current permanent magnet motor, guide rails, slide bars, a synchronizing rod, a semi-ring A, a servo motor A, a semi-ring B, a servo motor B, a ring sleeve, a rotating shaft, a universal joint module, helical blades, a servo motor C and a servo motor D, wherein two guide rails are symmetrically arranged in the circular wind cylinder, and the two guide rails are respectively provided with the slide bars driven by the servo motor C in a sliding manner along the axial direction of the wind cylinder; the direct current permanent magnet motor has the advantages of small starting current, no need of soft start, quick start and low configuration cost. The power cable required to be configured for the direct current permanent magnet motor has the advantages of low manufacturing cost, low running current, low power consumption cost and low energy consumption. When the direct current permanent magnet motor needs to be maintained, the direct current permanent magnet motor can axially slide out of the air cylinder by removing the position fixation of the two screw rods B, and the direct current permanent magnet motor is convenient to disassemble.

Description

Direct current jet fan for tunnel

Technical Field

The invention belongs to the field of tunnel fans, and particularly relates to a direct-current jet fan for a tunnel.

Background

All need install the efflux fan in the tunnel, tunnel efflux fan in the extra-long tunnel is large-scale motor drive air supply, and at present, the motor of conventional tunnel efflux fan adopts conventional three-phase asynchronous machine, and the drawback of normality is: 1. the large motor has huge starting current, needs soft start, has long starting time and high configuration cost; 2. the power cable to be configured is three-phase four-core, the number of the cables is large, the cable is thick, and the cost of the cable is high; 3. the large three-phase asynchronous motor has large running current, high power consumption cost and large energy consumption.

Moreover, the motor in the jet fan is difficult to disassemble, so that the motor is inconvenient to maintain.

In addition, the general tunnel has imperfect waterproof measures, and when a fire breaks out in the tunnel, the fire cannot be automatically extinguished. If the automatic fire extinguishing is to be realized, automatic fire extinguishing equipment needs to be added in the tunnel, so that the equipment installation cost is high.

The invention designs a direct current jet fan for a tunnel to solve the problems.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention discloses a direct current jet fan for a tunnel, which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The direct current jet fan for the tunnel comprises an air duct, a nozzle module, a direct current permanent magnet motor, guide rails, slide bars, a synchronizing bar, a semi-ring A, a servo motor A, a semi-ring B, a servo motor B, a ring sleeve, a rotating shaft, a universal joint module, helical blades, a servo motor C and a servo motor D, wherein two guide rails are symmetrically arranged in the circular air duct, and the two guide rails are respectively provided with the slide bars driven by the servo motor C in a sliding manner along the axial direction of the air duct; a detachable direct current permanent magnet motor is arranged between two sliding rods which are fixedly connected through a synchronizing rod; the air duct is provided with a structure for fixing the working position of the DC permanent magnet motor therein, and the structure is synchronously driven by two servo motors D symmetrically arranged on the outer side of the air duct.

A semi-ring A is hinged between the two sliding rods through a round pin A, and the servo motor A drives the semi-ring A to rotate around the round pin A relative to the sliding rods; a semi-ring B is hinged in the semi-ring A through a round pin B, and the servo motor B drives the semi-ring B to rotate around the round pin B relative to the semi-ring A; and a cross universal joint structure is formed between the semi-ring B and the semi-ring A and between the semi-ring B and the two sliding rods.

The semi-ring B is provided with a ring sleeve with the same central axis through two support rods; a rotating shaft is rotationally matched in the ring sleeve; one end of the rotating shaft is in disconnectable transmission connection with an output shaft of the direct current permanent magnet motor through the universal joint module, and the other end of the rotating shaft is provided with a helical blade; the center of a cross shaft of the universal joint module coincides with the intersection point of the central axes of the round pin A and the round pin B.

Two thermal inductance nozzle modules which spray water inwards are arranged near the spiral blade end of the air duct, and the nozzle modules do not interfere with the movement of the semi-ring A, the semi-ring B and the spiral blade.

As a further improvement of the present technology, the dc permanent magnet motor is a dc permanent magnet motor; the magnetic steel material in the magnetic steel rotor component in the direct current permanent magnet motor is a Ru Fe B rare earth permanent magnet material, so that the magnetic energy and the coercive force are extremely high, and meanwhile, the energy density is high, and the cost performance is high; the rotor punching sheet in the magnetic steel rotor component in the direct current permanent magnet motor is a 35WW300 silicon steel sheet, and plastic package processing is performed after the rotor punching sheet and the magnetic steel are combined, so that the stability and reliability of an electromagnetic field are ensured.

As a further improvement of the technology, the enameled wire of the stator of the direct current permanent magnet motor is a polyesterimide enameled round copper wire, so that the heat generated by the motor is reduced, and the high temperature resistance of the motor is ensured; a thermal resistance sensor is arranged in the direct current permanent magnet motor to monitor the temperature of a motor coil.

As a further improvement of the technology, the magnetic steel material in the magnetic steel rotor component in the direct current permanent magnet motor comprises samarium cobalt material and other metal rare earth materials, the samarium cobalt material and the other metal rare earth materials are proportioned, melted into alloy, and crushed, pressed and sintered to prepare the magnetic material, the magnetic material has high magnetic energy product and extremely low temperature coefficient, the maximum working temperature can reach 350 ℃, and when the working temperature is over 180 ℃, the magnetic material and the temperature stability and the chemical stability thereof exceed those of the neodymium iron boron permanent magnet material.

As a further improvement of the technology, a protective net for preventing foreign matters from entering is arranged in the non-spiral blade end of the air duct; annular grooves A are formed in the inner walls of the two ends of the air duct, and sound insulation cotton is filled in each annular groove A. The soundproof cotton carries out the active absorption to the produced noise of dryer both ends because of the air flow. An annular net sleeve for fixing the soundproof cotton in the corresponding annular groove A is arranged in the air duct; two mounting frames which are axially distributed at intervals are mounted on the outer side of the air duct, and the air duct is hung on the top of the tunnel through bolts by the mounting frames; the two sliding rods are fixedly arranged in the air duct through two fixed seats respectively; the shell of the direct current permanent magnet motor is cylindrical with the same central axis as the air duct; an internal thread sleeve B with the central axis perpendicular to the central axis of the air duct is rotatably matched in the circular groove B of each slide rod; the two internal thread sleeves B are the same with the central axis; a screw A matched with a fixed sleeve arranged on the shell of the direct current permanent magnet motor is screwed in each internal thread sleeve B; each sliding rod is provided with a trapezoidal guide strip which slides in a trapezoidal guide groove on the corresponding guide rail. The trapezoidal guide strip and the trapezoidal guide groove are matched to play a role in positioning and guiding the sliding of the sliding rod on the guide rail.

As a further improvement of the technology, two opposite circular grooves A on the wall of the air duct cylinder are respectively in threaded fit with screws B of which the central axes are vertically intersected with the central axis of the shell of the direct current permanent magnet motor, and the two screws B are respectively driven by two servo motors D to rotate; one end of the screw B is rotatably matched with a pressing arc plate matched with the shell of the direct-current permanent magnet motor, and the other end of the screw B is provided with a gear E meshed with a gear D arranged on the output shaft of the corresponding servo motor; each abutting arc plate is connected with the inner wall of the air duct through two telescopic rods which are symmetrical in parallel and stretch along the axial direction of the screw rod B. The telescopic rod plays a guiding role in the axial movement of the corresponding screw B.

As a further improvement of the technology, a circular ring B is arranged on the outer side of the internal thread sleeve B, and the circular ring B rotates in a circular groove B on the inner wall of the corresponding circular groove B. The circular ring B is matched with the circular groove B to ensure that the internal thread sleeve B only rotates in the corresponding circular groove B. One end of the screw B rotates in the circular groove C on the corresponding abutting arc plate, and the circular ring E arranged on the screw B rotates in the circular groove D on the inner wall of the corresponding circular groove C. The matching of the circular ring E and the circular groove D ensures that one end of the screw B only rotates in the circular groove C of the corresponding abutting arc plate.

As a further improvement of the technology, the servo motor C is mounted on the end face of the spiral blade end of the air duct; a gear C arranged on an output shaft of the servo motor C is meshed with a rack arranged on one sliding rod; a circular ring D for limiting the axial sliding amplitude of the helical blade on the rotating shaft is fixedly arranged on the rotating shaft, and a nut for tightly pressing the helical blade on the circular ring D is in threaded fit with the rotating shaft; the ring C arranged on the rotating shaft rotates in the ring groove C on the inner wall of the ring sleeve. The matching of the circular ring C and the circular groove C ensures that the ring sleeve only rotates on the rotating shaft.

As a further improvement of the technology, the rotating shaft is connected with a hexagonal shaft through the tail end of a universal joint. The nested external screw thread cover that has on the hexagonal axle, the interior hexagonal groove B and the hexagonal axle axial sliding fit of external screw thread cover inner wall guarantee only to produce relative endwise slip between hexagonal axle and the external screw thread cover for the external screw thread cover is with the rotation synchronization of hexagonal axle. The end of the hexagonal shaft is provided with a limiting block for preventing the external thread sleeve from axially slipping. The inner hexagonal groove A on the inner wall of the external thread sleeve is in inserting fit with the hexagonal boss on the output shaft of the direct current permanent magnet motor, so that the direct current permanent magnet motor can drive the hexagonal shaft to rotate synchronously through the external thread sleeve. An internal thread sleeve A matched with the external thread sleeve is nested on an output shaft of the direct current permanent magnet motor, and anti-skid threads convenient for a manual knob are arranged on the outer side of the internal thread sleeve A; and a circular ring A for preventing the internal thread sleeve A from axially slipping is arranged on the direct current permanent magnet motor.

As a further improvement of the technology, one end of the semi-ring A is hinged with one sliding rod through a round pin A, and the other end of the semi-ring A is in transmission connection with an output shaft of a servo motor A arranged on the other sliding rod; the output shaft of the servo motor A and the round pin A are the same as the central axis; the servo motor B is arranged on the semi-ring A; a gear A mounted on an output shaft of the servo motor B is meshed with a gear B mounted on a round pin B.

Compared with the traditional tunnel fan, the direct-current permanent magnet motor has the advantages of small starting current, no need of soft start, quick start and low configuration cost. The power cable required to be configured for the direct current permanent magnet motor has the advantages of low manufacturing cost, low running current, low power consumption cost and low energy consumption.

When the direct current permanent magnet motor needs to be maintained, the direct current permanent magnet motor can axially slide out of the air cylinder by removing the position fixation of the two screw rods B, and the direct current permanent magnet motor is convenient to disassemble.

When a fire disaster happens nearby, the invention is installed in a tunnel, two screws B for fixing the position of a direct current permanent magnet motor in an air duct are respectively released from fixing the position of the direct current permanent magnet motor under the synchronous drive of a corresponding servo motor D, a running helical blade is driven by a servo motor C to rapidly slide out of the air duct and swing towards the direction of a fire disaster generation place under the common drive of the servo motor A and the servo motor B, two nozzle modules spray water into the air duct simultaneously, and the running helical blade guides the water flow sprayed into the air duct by the two nozzle modules to a fire disaster point in the tunnel, so that the invention can realize timely extinguishing of the fire disaster generated nearby in the tunnel, prevent the fire disaster from further spreading and expanding, and has better fire prevention and extinguishing functions.

The invention has simple structure and better use effect.

Drawings

Fig. 1 is an overall schematic view of the present invention from two perspectives.

FIG. 2 is a schematic side sectional view of the present invention.

Fig. 3 is a schematic cross-sectional view of the dc permanent magnet motor, an internal thread bushing a, an external thread bushing, a hexagonal shaft, a universal joint module, a rotating shaft, a bushing, a support rod, a semi-ring B, a semi-ring a, a round pin a, a servo motor a, and a slide rod.

Fig. 4 is a schematic cross-sectional view of the air duct, the dc permanent magnet motor, the pressing arc plate, the screw B, the rack, and the servo motor C.

Fig. 5 is a schematic cross-sectional view of the air duct, the guide rail, the slide bar, the internal thread sleeve a, the screw a, the fixed sleeve, the dc permanent magnet motor, the abutting arc plate, the screw B, and the servo motor D.

Fig. 6 is a schematic cross-sectional view of the wind tunnel, the telescopic rod, the dc permanent magnet motor, the pressing arc plate, the screw B, the gear E, the gear D, and the servo motor D.

Fig. 7 is a schematic cross-sectional view of the combination of an air duct, a guide rail, a trapezoidal guide bar, a slide bar, an internal thread sleeve A, a screw A, a pressing arc plate and a DC permanent magnet motor.

Fig. 8 is a schematic cross-sectional view of the nozzle module, the helical blade, the rotating shaft, the universal joint module, the hexagonal shaft, the external thread sleeve, the internal thread sleeve a, and the dc permanent magnet motor.

Fig. 9 is a schematic sectional view of an air duct.

Fig. 10 is a cross-sectional view of the guide rail and the slide bar.

Fig. 11 is a schematic cross-sectional view of the dc permanent magnet motor in cooperation with the internal thread bushing a.

Figure 12 is a cross-sectional view of the pressing arc plate.

FIG. 13 is a schematic cross-sectional view of an externally threaded sleeve and a portion thereof.

FIG. 14 is a schematic view of the rotation shaft, the universal joint module, the hexagonal shaft and the limiting block.

FIG. 15 is a schematic cross-sectional view of the servo motor A, the half ring A, the round pin B, the gear A, the servo motor B, the half ring B, the support rod and the ring sleeve.

Number designation in the figures: 1. an air duct; 2. a ring groove A; 3. a circular groove A; 4. a mounting frame; 5. a bolt; 6. a protective net; 7. a nozzle module; 8. sound insulation cotton; 9. a net cover; 10. a direct current permanent magnet motor; 11. a hexagonal boss; 13. a circular ring A; 14. an internal thread sleeve A; 15. anti-skid lines; 16. fixing a sleeve; 17. a fixed seat; 18. a guide rail; 19. a trapezoidal guide groove; 20. a slide bar; 21. a circular groove B; 22. a ring groove B; 23. a trapezoidal conducting bar; 24. a synchronization lever; 25. an internal thread sleeve B; 26. a circular ring B; 27. a screw A; 28. a semi-ring A; 29. a round pin A; 30. a servo motor A; 31. a half ring B; 32. a round pin B; 33. a gear B; 34. a gear A; 35. a servo motor B; 36. a support bar; 37. sleeving a ring; 38. a ring groove C; 39. a rotating shaft; 40. a circular ring C; 41. a gimbal module; 42. a hexagonal shaft; 43. a limiting block; 44. an external thread sleeve; 45. an inner hexagonal groove A; 46. an inner hexagonal groove B; 47. a circular ring D; 48. a helical blade; 49. a nut; 50. a rack; 51. a gear C; 52. a servo motor C; 53. a screw B; 54. a circular ring E; 55. pressing the arc plate; 56. a circular groove C; 57. a ring groove D; 58. a gear E; 59. a gear D; 60. a servo motor D; 61. a telescopic rod.

Detailed Description

The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1, 2 and 4, the air duct comprises an air duct 1, a nozzle module 7, a direct current permanent magnet motor 10, guide rails 18, slide bars 20, a synchronization rod 24, a half ring a28, a servo motor a30, a half ring B31, a servo motor B35, a ring sleeve 37, a rotating shaft 39, a universal joint module 41, a helical blade 48, a servo motor C52 and a servo motor D60, wherein as shown in fig. 2 and 5, two guide rails 18 are symmetrically installed in the circular air duct 1, and the two guide rails 18 are respectively provided with a slide bar 20 driven by the servo motor C52 in an axial direction of the air duct 1; a detachable direct current permanent magnet motor 10 is arranged between two sliding rods 20 fixedly connected through a synchronous rod 24; as shown in fig. 4, 5 and 6, the air duct 1 has a structure for fixing the operating position of the dc permanent magnet motor 10 therein, and the structure is synchronously driven by two servo motors D60 symmetrically installed outside the air duct 1.

As shown in fig. 1, 3 and 15, a half ring a28 is hinged between the two slide bars 20 through a round pin a29, and a servo motor a30 drives the half ring a28 to rotate around the round pin a29 relative to the slide bars 20; a half ring B31 is hinged in the half ring A28 through a round pin B32, and a servo motor B35 drives the half ring B31 to rotate around a round pin B32 relative to the half ring A28; the half ring B31 and the half ring A28 form a cross universal joint structure with the two slide bars 20.

As shown in fig. 3 and 15, the half ring B31 is provided with a ring sleeve 37 with concentric axes through two support rods 36; the ring sleeve 37 is internally matched with a rotating shaft 39 in a rotating way; one end of the rotating shaft 39 is in disconnectable transmission connection with an output shaft of the direct current permanent magnet motor 10 through the universal joint module 41, and the other end of the rotating shaft is provided with a helical blade 48; the cross-axis center of gimbal module 41 coincides with the intersection of the central axes of round pin a29 and round pin B32.

As shown in fig. 1, 4 and 8, two thermal nozzle modules 7 for spraying water inwards are installed near the ends of the spiral blades 48 of the air duct 1, and the nozzle modules 7 do not interfere with the movement of the half ring a28, the half ring B31 and the spiral blades 48.

As shown in fig. 2, 3 and 11, the dc permanent magnet motor 10 is a dc permanent magnet motor; the magnetic steel material in the magnetic steel rotor assembly in the direct current permanent magnet motor 10 is a Ru iron boron rare earth permanent magnet material, so that the magnetic energy and the coercive force are extremely high, and meanwhile, the energy density is high, and the cost performance is high; the rotor punching sheet in the magnetic steel rotor component in the direct current permanent magnet motor 10 is a 35WW300 silicon steel sheet, and plastic package processing is performed after the rotor punching sheet and the magnetic steel are combined, so that the stability and reliability of an electromagnetic field are ensured.

As shown in fig. 2, 3 and 11, the enameled wire of the stator of the dc permanent magnet motor 10 is a polyester-imide enameled round copper wire, so that the heat generated by the motor is reduced, and the high temperature resistance of the motor is ensured; a thermal resistance sensor is arranged in the direct current permanent magnet motor 10 to monitor the temperature of a motor coil.

As shown in fig. 2, 3, and 11, the magnetic steel material in the magnetic steel rotor assembly in the dc permanent magnet motor 10 includes samarium cobalt material, and other metal rare earth material, which are proportioned, melted into an alloy, and then pulverized, pressed, and sintered to obtain a magnetic material, which has high magnetic energy product and extremely low temperature coefficient, the maximum working temperature can reach 350 ℃, and when the working temperature is above 180 ℃, the temperature stability and chemical stability thereof exceed those of the neodymium iron boron permanent magnet material.

As shown in fig. 1, 2 and 4, a protective net 6 for preventing foreign matters from entering is installed in the end of the non-helical blade 48 of the air duct 1; as shown in fig. 2, 4 and 9, the inner walls of the two ends of the air duct 1 are respectively provided with a ring groove a2, and sound insulation cotton 8 is filled in each ring groove a 2. The soundproof cotton 8 effectively absorbs the noise generated by the air flow at the two ends of the air duct 1. An annular net sleeve 9 for fixing the soundproof cotton 8 in the corresponding annular groove A2 is arranged in the air duct 1; as shown in fig. 1 and 2, two mounting frames 4 are axially arranged at intervals outside the air duct 1, and the air duct 1 is hung on the top of the tunnel by the mounting frames 4 through bolts 5; as shown in fig. 2, two sliding rods 20 are respectively and fixedly installed in the air duct 1 through two fixing seats 17; as shown in fig. 5, the casing of the dc permanent magnet motor 10 is cylindrical with the same central axis as the air duct 1; as shown in fig. 2, 7 and 10, an internal thread sleeve B25 with a central axis perpendicular to the central axis of the air duct 1 is rotatably matched in the circular groove B21 of each slide rod 20; the two internal thread sleeves B25 are concentric with the central axis; a screw A27 matched with a fixed sleeve 16 arranged on the shell of the direct current permanent magnet motor 10 is screwed in each internal thread sleeve B25; as shown in fig. 5 and 10, each slide rod 20 is mounted with a trapezoidal bar 23, and the trapezoidal bar 23 slides in the trapezoidal groove 19 of the corresponding guide rail 18. The cooperation of the trapezoidal bar 23 and the trapezoidal groove 19 plays a positioning and guiding role for the sliding of the slide bar 20 on the guide rail 18.

As shown in fig. 5, 6 and 9, two opposite circular grooves a3 on the wall of the air duct 1 are respectively in threaded fit with screws B53 whose central axes are perpendicular to the central axis of the housing of the dc permanent magnet motor 10, and the two screws B53 are respectively driven by two servo motors D60 to rotate; one end of the screw B53 is rotatably matched with a pressing arc plate 55 matched with the shell of the direct current permanent magnet motor 10, and the other end of the screw B53 is provided with a gear E58 meshed with a gear D59 arranged on the corresponding servo motor output shaft; each pressing arc plate 55 is connected with the inner wall of the air duct 1 through two parallel symmetrical telescopic rods which extend and retract along the axial direction of the screw B53. The telescopic rods guide the axial movement of the respective screw B53.

As shown in fig. 7 and 10, a ring B26 is mounted on the outside of the internal thread bush B25, and a ring B26 is rotated in a ring groove B22 on the inner wall of the corresponding ring groove B21. The ring B26 cooperates with the ring groove B22 to ensure that the internally threaded bush B25 only rotates within the corresponding ring groove B21. As shown in fig. 6 and 12, one end of the screw B53 rotates in the circular groove C56 of the corresponding pressing arc plate 55, and the circular ring E54 mounted on the screw B53 rotates in the circular groove D57 on the inner wall of the corresponding circular groove C56. The engagement of ring E54 with groove D57 ensures that only rotation of one end of screw B53 occurs within the corresponding circular groove C56 of the retaining arc 55.

As shown in fig. 1, 2 and 4, the servo motor C52 is mounted on the end face of the end of the spiral blade 48 of the air duct 1; a gear C51 arranged on an output shaft of the servo motor C52 is meshed with a rack 50 arranged on one sliding rod 20; as shown in fig. 3, a ring D47 for limiting the axial sliding amplitude of the helical blade 48 on the rotating shaft 39 is fixedly mounted on the rotating shaft 39, and a nut 49 for tightly pressing the helical blade 48 against the ring D47 is in threaded fit with the rotating shaft 39; the ring C40 mounted on the shaft 39 rotates in the groove C38 on the inner wall of the ring 37. The engagement of the ring C40 with the groove C38 ensures that the ring 37 only rotates on the shaft 39.

As shown in fig. 3, 13 and 14, the rotating shaft 39 is connected to a hexagonal shaft 42 through a joint end. The hexagonal shaft 42 is nested with the external thread sleeve 44, and the internal hexagonal groove B46 of the internal wall of the external thread sleeve 44 is in axial sliding fit with the hexagonal shaft 42, so that only relative axial sliding is generated between the hexagonal shaft 42 and the external thread sleeve 44, and the external thread sleeve 44 and the hexagonal shaft 42 rotate synchronously. The end of the hexagonal shaft 42 is provided with a stopper 43 for preventing the external thread sleeve 44 from axially slipping. As shown in fig. 3, 11 and 13, the hexagonal socket a45 on the inner wall of the external thread sleeve 44 is in insertion fit with the hexagonal boss 11 on the output shaft of the dc permanent magnet motor 10, so as to ensure that the dc permanent magnet can drive the hexagonal shaft 42 to rotate synchronously through the external thread sleeve 44. An internal thread sleeve A14 matched with the external thread sleeve 44 is nested on an output shaft of the direct current permanent magnet motor 10, and anti-skid threads 15 convenient for manual knob are arranged on the outer side of the internal thread sleeve A14; the direct current permanent magnet motor 10 is provided with a circular ring A13 which prevents the internal thread sleeve A14 from slipping axially.

As shown in fig. 3 and 15, one end of the half ring a28 is hinged with one sliding rod 20 through a round pin a29, and the other end of the half ring a28 is in transmission connection with an output shaft of a servo motor a30 mounted on the other sliding rod 20; the output shaft of the servo motor A30 and the round pin A29 are coaxial; the servo motor B35 is arranged on the half ring A28; a gear a34 mounted on the output shaft of the servomotor B35 meshes with a gear B33 mounted on a round pin B32.

The servo motor A30, the servo motor B35, the servo motor C52 and the servo motor D60 all adopt the prior art. The universal joint module 41 and the nozzle module 7 in the present invention are both of the prior art.

The working process of the invention is as follows: in an initial state, the dc permanent magnet motor 10 is located in the middle of the interior of the air duct 1, the two screws a27 are respectively and tightly pressed against the corresponding fixing sleeves 16, and the two screws B53 are respectively and tightly pressed against the outer shell of the dc permanent magnet motor 10 through the corresponding pressing arc plates 55 to fix the position of the dc permanent magnet motor 10 in the middle of the interior of the air duct 1. The helical blade 48 is located at the working position in one end of the air duct 1, and the central axes of the half ring A28 and the half ring B31 are coincident with the central axis of the air duct 1. The internal thread sleeve A14 is screwed with the external thread sleeve 44, the external thread sleeve 44 is tightly pressed against the circular ring A13, and the output shaft of the direct current permanent magnet motor 10 is in transmission connection with the hexagonal shaft 42.

When the invention is installed at the top of a tunnel and needs to operate, the control system controls the direct current permanent magnet motor 10 to operate, the direct current permanent magnet motor 10 drives the rotating shaft 39 to rotate rapidly in the ring sleeve 37 through the external thread sleeve 44, the hexagonal shaft 42 and the universal joint module 41, the rotating shaft 39 drives the helical blade 48 installed on the rotating shaft to rotate rapidly, and the helical blade 48 rotating rapidly enables air in the tunnel to enter from one end of the protective screen 6 of the air duct 1 and exit from the end of the helical blade 48 of the air duct 1, so that the effective flow of the air in the tunnel is realized.

In practical application, compared with a conventional tunnel jet fan adopting a three-phase asynchronous motor, the tunnel jet fan adopting the direct-current permanent magnet motor 10 has the following advantages:

1. when the direct current permanent magnet motor 10 does not work, the magnetic brake between the rotor assembly and the stator is automatic, so that the spiral blade 48 cannot slowly rotate disorderly due to the self-flowing air in the tunnel, after the direct current permanent magnet motor 10 works by electrifying, the magnetic brake is automatically released, so that the spiral blade 48 starts to rotate and ventilate, and under the same application condition, the service life of a bearing of the direct current permanent magnet motor 10 is greatly prolonged.

2. The direct current permanent magnet motor 10 adopts a two-phase three-core cable, so that the manufacturing cost is reduced, and the configuration cost is reduced.

3. The direct current permanent magnet motor 10 has small starting current, can be directly started without soft start and corresponding matching equipment, reduces the configuration cost and synchronously reduces the failure rate.

4. The direct current permanent magnet motor 10 of the invention has small working and operating current, saves electricity cost, reduces energy consumption, saves energy and protects environment,

5. when the direct current permanent magnet motor 10 is accidentally locked, the current is 50% less than the multiple of the locked rotor current of the three-phase asynchronous motor, the locked rotor current of the three-phase asynchronous motor is mostly 8 times of the rated current, and the locked rotor current of the direct current permanent magnet motor 10 is 3.5-4 times of the rated current, so that the accidental burning probability is greatly reduced, and the hidden danger probability of high-temperature fire is reduced.

6. The weight of the whole direct current permanent magnet motor 10 is reduced by 50% compared with that of a three-phase asynchronous motor with the same specification, so that the whole weight of the direct current permanent magnet motor is greatly reduced, and the accidental hidden danger caused by the whole load after installation is improved.

The invention applied to tunnel ventilation is driven by the direct current permanent magnet motor 10, is an ultra-efficient motor product, is energy-saving and environment-friendly, and the highest efficiency of the direct current permanent magnet motor 10 reaches a 1-level energy efficiency limit value which can reach 95.0%. Compared with the similar products, the efficiency is improved by about 2 percent, the cost is reduced by more than 20 percent, the weight of the direct current permanent magnet motor 10 is reduced by about 10 to 60 percent, and the direct current permanent magnet motor is in a technology leading position in the similar products in the industry, thereby being beneficial to promoting the adjustment of the product structure of the driving motor in the industry and promoting the development of the energy-saving technology of the motor.

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 changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

When a certain position near the tunnel is ignited for some reasons in the tunnel, an operator in a control room controls two servo motors D60 to synchronously operate through a control system, the two servo motors D60 drive screws B53 on corresponding sides to rotate through corresponding gears D59 and E58 respectively, the two screws B53 drive the pressing arc plates 55 on corresponding sides to be separated from the shell of the direct current permanent magnet motor 10 in the radial direction and release the fixation of the direct current permanent magnet motor 10 on the working position of the air duct 1, and two telescopic rods for guiding the movement of each pressing arc plate 55 shrink simultaneously.

Then, the control system controls the two servo motors D60 to stop running and simultaneously controls the servo motor C52 to run, and the servo motor C52 drives the two sliding rods 20 to axially and synchronously move in the air duct 1 through the gear C51 and the rack 50. The two sliding rods 20 connected by the synchronizing rod 24 drive the dc permanent magnet motor 10 to axially move in the wind tunnel 1 through the screw a27 and the two internal thread sleeves a14 which are in abutting press fit with the two fixing sleeves 16. Meanwhile, the two slide bars 20 drive a rotating shaft 39 which is in transmission connection with the output shaft of the direct current permanent magnet motor 10 to synchronously move through a cross universal joint structure formed by the half ring A28 and the half ring B31, the two support rods 36 and the ring sleeve 37, and the rotating shaft 39 drives the helical blade 48 which keeps rotating to axially move towards the outside of the wind barrel 1.

When the helical blade 48 axially moves to the outside of the air duct 1 and the cross universal joint structure formed by the half ring a28 and the half ring B31 is just located in the air duct 1, the control system controls the servo motor C52 to stop running and controls the servo motor a30 and the servo motor B35 to simultaneously run, so that the central axis of the half ring a28 swings around the round pin a29 in the direction pointing to the ignition point, the central axis of the half ring B31 swings around the round pin B32 in the direction pointing to the ignition point, and finally the two support rods 36 drive the rotating shaft 39 to swing around the center of the cross shaft of the universal joint module 41 in the direction pointing to the ignition point in the tunnel through the ring sleeve 37, and the rotating shaft 39 drives the central axis of the helical blade 48 to point to the ignition point in the tunnel.

When the central axis of the spiral blade 48 just points to the ignition point in the tunnel, the control system controls the servo motor A30 and the servo motor B35 to stop running, and simultaneously, the control system controls the two nozzle modules 7 to spray water into the air duct 1, and the water flow sprayed into the air duct 1 by the two nozzle modules 7 is dragged by the spiral blade 48 rotating at high speed to spray and extinguish the fire to the ignition point in the tunnel, so that the fire extinguishing and preventing functions of the invention are realized.

During the swinging of the rotating shaft 39 around the universal joint module 41, since the center of the cross shaft of the universal joint module 41 coincides with the intersection of the central axes of the round pin a29 and the round pin B32, the swinging of the rotating shaft 39 does not interfere with the operation and position of the hexagonal shaft 42.

After the fire extinguishing is finished, the control system controls the servo motor A30 and the servo motor B35 to run in the reverse direction, the rotating shaft 39 is driven by the servo motor A30 and the servo motor B35 to rapidly swing back and reset around the center of the cross shaft of the universal joint module 41, and the rotating shaft 39 drives the helical blades 48 to rapidly swing back and reset. When the central axis of the rotating shaft 39 coincides with the central axis of the air duct 1, the control system controls the servo motor A30 and the servo motor B35 to stop running, and the control system controls the servo motor C52 to drive the two sliding rods 20 to drive the helical blades 48 and the direct current permanent magnet motor 10 to axially reset towards the interior of the air duct 1.

After the helical blade 48 and the dc permanent magnet motor 10 complete the axial reset in the air duct 1, the control system controls the servo motor C52 to stop running and controls the two servo motors D60 to synchronously and reversely run, the two servo motors D60 respectively drive the corresponding screws B53 to reversely rotate, and the two screws B53 respectively drive the corresponding pressing arc plates 55 to tightly press the outer side of the dc permanent magnet motor 10 again and complete the fixation of the dc permanent magnet motor 10 at the working position of the air duct 1.

When the direct current permanent magnet motor 10 breaks down and needs to be maintained or replaced, the control system controls the two servo motors D60 to run synchronously, the two servo motors D60 drive the corresponding screws B53 to rotate rapidly respectively, and the two screws B53 drive the corresponding pressing arc plates 55 to axially and rapidly separate from the shell of the direct current permanent magnet motor 10 and release the fixation of the direct current permanent magnet motor 10 on the working position of the air duct 1. When the fixing of the direct current permanent magnet motor 10 at the working position of the air duct 1 is completely released, the control system controls the two servo motors D60 to stop running simultaneously and controls the servo motor C52 to run, the servo motor C52 drives the two slide bars 20 to axially move towards the outside of the air duct 1 through a series of transmission, and the two slide bars 20 drive the direct current permanent magnet motor 10 and all other parts mounted on the slide bars 20 to synchronously axially move towards the outside of the air duct 1.

When the direct current permanent magnet motor 10 completely moves out of the air duct 1, the control system controls the servo motor C52 to stop running. The internal thread sleeve A14 is axially separated from the external thread sleeve 44 by manually rotating the internal thread sleeve A14, and then the external thread sleeve 44 is axially moved to be separated from the hexagonal boss 11 of the output shaft of the direct current permanent magnet motor 10, so that the transmission connection between the direct current permanent magnet motor 10 and the hexagonal shaft 42 is disconnected.

Then, the two internal thread sleeves B25 are manually and respectively rotated, so that the two internal thread sleeves B25 respectively drive the corresponding screws a27 to radially contract by a small amplitude along the air duct 1, so that the two screws a27 do not tightly press the corresponding fixed sleeves 16, and the direct-current permanent magnet motor 10 can freely swing around the central axis of the two screws a 27. The direct current permanent magnet motor 10 freely swings around the central axis of the two screws A27 outside the air duct 1, so that maintenance personnel can conveniently carry out all-directional maintenance on the direct current permanent magnet motor. If the direct current permanent magnet motor 10 needs to be replaced, the direct current permanent magnet motor 10 needs to be kept at the same height through a hoisting device through a hanging strip, then the two internal thread sleeves B25 are rotated to enable the two screws a27 to be completely separated from the corresponding fixed sleeves 16 respectively, and when the two screws a27 are separated from the corresponding fixed sleeves 16 respectively, the direct current permanent magnet motor 10 is hoisted to the ground by the hoisting device. And a new direct current permanent magnet motor 10 is lifted to the air duct 1 through the lifting equipment and is reinstalled, so that the direct current permanent magnet motor 10 can be replaced.

After the maintenance or replacement of the dc permanent magnet motor 10 is finished, the dc permanent magnet motor 10 is swung back around the central axis of the two screws a27 to be reset, and the position of the dc permanent magnet motor 10 relative to the two sliding rods 20 is fixed again by reversely rotating the two internal thread sleeves B25. After the dc permanent magnet motor 10 swings back and is reset and re-fixed, the external thread sleeve 44 slides axially, so that the external thread sleeve 44 is axially sleeved on the hexagonal boss of the output shaft of the dc permanent magnet motor 10, and the internal thread sleeve a14 is rotated reversely, so that the internal thread sleeve a14 is finally tightly screwed with the external thread sleeve 44 and the transmission connection of the dc permanent magnet motor 10 and the hexagonal shaft 42 is completed.

After the transmission connection between the hexagonal shaft 42 and the output shaft of the direct current permanent magnet motor 10 is reestablished, the control system controls the servo motor C52 to run reversely, the servo motor C52 drives the two slide bars 20 to slide back into the air duct 1 for resetting through a series of transmission, and the two slide bars 20 drive the direct current permanent magnet motor 10 and the helical blades 48 to synchronously move into the air duct 1 for resetting.

In conclusion, the beneficial effects of the invention are as follows: the direct current permanent magnet motor 10 has the advantages of small starting current, no need of soft start, quick start and low configuration cost. The power cable required to be configured for the direct current permanent magnet motor 10 has the advantages of low manufacturing cost, low running current, low power consumption cost and low energy consumption.

When the direct current permanent magnet motor 10 needs to be maintained, the direct current permanent magnet motor 10 can be conveniently detached by removing the position fixing of the two screws B53 to the direct current permanent magnet motor and axially sliding out the wind cylinder 1.

When a fire disaster nearby the tunnel is caused, two screws B53 for fixing the position of the direct current permanent magnet motor 10 in the air duct 1 are respectively driven by the corresponding servo motors D60 synchronously to release the fixation of the position of the direct current permanent magnet motor 10, the operating helical blade 48 is driven by the servo motor C52 to slide out of the air duct 1 rapidly and swing towards the direction of a fire disaster generating place under the common drive of the servo motor A30 and the servo motor B35, the two nozzle modules 7 spray water into the air duct 1 simultaneously, and the operating helical blade 48 guides the water flow sprayed into the air duct 1 by the two nozzle modules 7 to a fire disaster point in the tunnel, so that the fire disaster generated in the place nearby the tunnel in the tunnel can be extinguished in time, the fire disaster is prevented from further spreading and expanding, and the fire-fighting function is good.

Claims

1. A direct current efflux fan for tunnel, its characterized in that: the device comprises an air duct, a nozzle module, a direct current permanent magnet motor, guide rails, slide bars, a synchronous rod, a semi-ring A, a servo motor A, a semi-ring B, a servo motor B, a ring sleeve, a rotating shaft, a universal joint module, helical blades, a servo motor C and a servo motor D, wherein two guide rails are symmetrically arranged in the circular air duct, and the slide bars driven by the servo motor C are respectively arranged on the two guide rails in a sliding manner along the axial direction of the air duct; a detachable direct current permanent magnet motor is arranged between two sliding rods which are fixedly connected through a synchronizing rod; the air duct is provided with a structure for fixing the working position of the DC permanent magnet motor therein, and the structure is synchronously driven by two servo motors D symmetrically arranged on the outer side of the air duct;

a semi-ring A is hinged between the two sliding rods through a round pin A, and the servo motor A drives the semi-ring A to rotate around the round pin A relative to the sliding rods; a semi-ring B is hinged in the semi-ring A through a round pin B, and the servo motor B drives the semi-ring B to rotate around the round pin B relative to the semi-ring A; a cross universal joint structure is formed among the semi-ring B, the semi-ring A and the two sliding rods;

the semi-ring B is provided with a ring sleeve with the same central axis through two support rods; a rotating shaft is rotationally matched in the ring sleeve; one end of the rotating shaft is in disconnectable transmission connection with an output shaft of the direct current permanent magnet motor through the universal joint module, and the other end of the rotating shaft is provided with a helical blade; the center of a cross shaft of the universal joint module is superposed with the intersection point of the central axes of the round pin A and the round pin B;

2. The direct current jet fan for a tunnel of claim 1, wherein: the direct-current permanent magnet motor is a direct-current permanent magnet motor; the magnetic steel material in the magnetic steel rotor component in the direct current permanent magnet motor is a Ru Fe B rare earth permanent magnet material, so that the magnetic energy and the coercive force are extremely high, and meanwhile, the energy density is high, and the cost performance is high; the rotor punching sheet in the magnetic steel rotor component in the direct current permanent magnet motor is a 35WW300 silicon steel sheet, and plastic package processing is performed after the rotor punching sheet and the magnetic steel are combined, so that the stability and reliability of an electromagnetic field are ensured.

3. The direct current jet fan for a tunnel of claim 1, wherein: the enameled wire of the direct current permanent magnet motor stator is a polyesterimide enameled copper round wire, so that the heat generated by the motor is reduced, and the high-temperature resistance of the motor is ensured; a thermal resistance sensor is arranged in the direct current permanent magnet motor to monitor the temperature of a motor coil.

4. The direct current jet fan for a tunnel of claim 1, wherein: the magnetic steel material in the magnetic steel rotor component in the direct current permanent magnet motor contains samarium cobalt material and other metal rare earth materials, and is prepared by proportioning, smelting into alloy, crushing, profiling and sintering, and the magnetic material has high magnetic energy product and extremely low temperature coefficient, the highest working temperature can reach 350 ℃, and when the working temperature is over 180 ℃, the temperature stability and the chemical stability of the magnetic steel material exceed those of the neodymium iron boron permanent magnet material.

5. The direct current jet fan for a tunnel of claim 1, wherein: a protective net for preventing foreign matters from entering is arranged in the non-spiral blade end of the air duct; annular grooves A are formed in the inner walls of the two ends of the air duct, and sound insulation cotton is filled in each annular groove A; an annular net sleeve for fixing the soundproof cotton in the corresponding annular groove A is arranged in the air duct; two mounting frames which are axially distributed at intervals are mounted on the outer side of the air duct, and the air duct is hung on the top of the tunnel through bolts by the mounting frames; the two sliding rods are fixedly arranged in the air duct through two fixed seats respectively; the shell of the direct current permanent magnet motor is cylindrical with the same central axis as the air duct; an internal thread sleeve B with the central axis perpendicular to the central axis of the air duct is rotatably matched in the circular groove B of each slide rod; the two internal thread sleeves B are the same with the central axis; a screw A matched with a fixed sleeve arranged on the shell of the direct current permanent magnet motor is screwed in each internal thread sleeve B; each sliding rod is provided with a trapezoidal guide strip which slides in a trapezoidal guide groove on the corresponding guide rail.

6. The direct current jet fan for a tunnel of claim 1, wherein: two opposite circular grooves A on the wall of the air duct are respectively in threaded fit with screws B of which the central axis is vertically intersected with the central axis of the shell of the direct-current permanent magnet motor, and the two screws B are respectively driven by two servo motors D to rotate; one end of the screw B is rotatably matched with a pressing arc plate matched with the shell of the direct-current permanent magnet motor, and the other end of the screw B is provided with a gear E meshed with a gear D arranged on the output shaft of the corresponding servo motor; each abutting arc plate is connected with the inner wall of the air duct through two telescopic rods which are symmetrical in parallel and stretch along the axial direction of the screw rod B.

7. The direct current jet fan for a tunnel according to claim 5 or 6, wherein: a circular ring B is arranged on the outer side of the internal thread sleeve B and rotates in a circular groove B on the inner wall of the corresponding circular groove B; one end of the screw B rotates in the circular groove C on the corresponding abutting arc plate, and the circular ring E arranged on the screw B rotates in the circular groove D on the inner wall of the corresponding circular groove C.

8. The direct current jet fan for a tunnel of claim 1, wherein: the servo motor C is arranged on the end surface of the spiral blade end of the air duct; a gear C arranged on an output shaft of the servo motor C is meshed with a rack arranged on one sliding rod; a circular ring D for limiting the axial sliding amplitude of the helical blade on the rotating shaft is fixedly arranged on the rotating shaft, and a nut for tightly pressing the helical blade on the circular ring D is in threaded fit with the rotating shaft; the ring C arranged on the rotating shaft rotates in the ring groove C on the inner wall of the ring sleeve.

9. The direct current jet fan for a tunnel of claim 1, wherein: the rotating shaft is connected with a hexagonal shaft through the tail end of a universal joint; an external thread sleeve is nested on the hexagonal shaft, and an inner hexagonal groove B in the inner wall of the external thread sleeve is in axial sliding fit with the hexagonal shaft; the end of the hexagonal shaft is provided with a limiting block for preventing the external thread sleeve from axially slipping; an inner hexagonal groove A on the inner wall of the external thread sleeve is in inserting fit with a hexagonal boss on the output shaft of the direct current permanent magnet motor; an internal thread sleeve A matched with the external thread sleeve is nested on an output shaft of the direct current permanent magnet motor, and anti-skid threads convenient for a manual knob are arranged on the outer side of the internal thread sleeve A; and a circular ring A for preventing the internal thread sleeve A from axially slipping is arranged on the direct current permanent magnet motor.

10. The direct current jet fan for a tunnel of claim 1, wherein: one end of the semi-ring A is hinged with one sliding rod through a round pin A, and the other end of the semi-ring A is in transmission connection with an output shaft of a servo motor A arranged on the other sliding rod; the output shaft of the servo motor A and the round pin A are the same as the central axis; the servo motor B is arranged on the semi-ring A; a gear A mounted on an output shaft of the servo motor B is meshed with a gear B mounted on a round pin B.