CN215890588U

CN215890588U - Fan blade for cooling tower

Info

Publication number: CN215890588U
Application number: CN202122326811.9U
Authority: CN
Inventors: 李喜妹; 陈志刚; 贾广华
Original assignee: Shanghai Haoqiang Agricultural Machinery Co ltd
Current assignee: Shanghai Haoqiang Agricultural Machinery Co ltd
Priority date: 2021-09-25
Filing date: 2021-09-25
Publication date: 2022-02-22
Anticipated expiration: 2031-09-25

Abstract

The application relates to the technical field of cooling, in particular to a fan blade for a cooling tower, which comprises a fixed box and a plurality of blades, wherein the end parts of the blades are fixedly provided with connecting columns, the fixed box is provided with a plurality of through holes with the connecting columns and the like, and each end of the connecting column deviating from the blades is rotatably connected in the through hole on the fixed box, a power output device is arranged in the fixed box and is connected with a plurality of telescopic devices, each telescopic device comprises a telescopic block, each connecting column is provided with a blind hole along the axial direction of the connecting column, the open end of the blind hole faces the inside of the fixed box, the telescopic block is slidably connected in the blind hole and slides along the axial direction of the blind hole, and a blade rotating structure for converting the telescopic motion of the telescopic block into the rotating motion of the connecting column is further arranged in the blind hole, this application has the effect that makes the flabellum of cooling tower fan carry out the angle regulation and control automatically.

Description

Fan blade for cooling tower

Technical Field

The application relates to the technical field of cooling, in particular to a fan blade for a cooling tower.

Background

A cooling tower is an evaporative heat sink for dissipating waste heat generated in industry or in a refrigeration air conditioner to reduce water temperature. Cooling towers typically use water as a circulating coolant to absorb heat from the system and reject it to the atmosphere to reduce the temperature of the system.

The application requirement of the cooling tower fan in the cooling equipment is higher and higher, the cooling tower fan plays the most basic role in the gas circulation in the cooling tower, the vaporized cooling medium is timely discharged in the cooling tower, the temperature in the tower can be reduced to the maximum extent, and the refrigeration effect of the cooling medium is guaranteed.

The fan is when handling different operating condition, and the angle of accessible adjustment blade is in order to change the air feed volume, but traditional cooling tower fan's flabellum angle can't carry out automatic adjustment, and manual regulation or the flabellum of changing different specifications after need demolising usually waste time and energy.

SUMMERY OF THE UTILITY MODEL

In order to make the flabellum of cooling tower fan carry out angle regulation and control voluntarily, the fan flabellum that this application provided for cooling tower used adopts following technical scheme:

the utility model provides a fan flabellum that cooling tower was used, includes fixed box and a plurality of flabellum, each the flabellum tip is all fixed and is provided with the spliced pole, fixed box is last seted up with the through-hole of numbers such as spliced pole, each the spliced pole deviates from the one end of flabellum rotate respectively connect in each through-hole on the fixed box, be provided with power take off in the fixed box, power take off is connected with a plurality of telescoping devices, the telescoping device includes flexible piece, each the blind hole has all been seted up along its axis direction to the spliced pole, blind hole open end orientation the inside of fixed box, flexible piece sliding connection in the blind hole and follow blind hole axial direction slides, still be provided with in the blind hole and be used for trunning into the concertina movement of flexible piece the flabellum revolution mechanic of spliced pole rotational movement.

Through adopting above-mentioned technical scheme, a plurality of flabellums pass through the spliced pole and are connected with fixed box rotation, form holistic fan flabellum structure, the power take off who sets up in fixed box, telescoping device and flabellum revolution mechanic play respectively provide power and give the telescoping device with power transmission, realize the flexible of flexible piece, change the flexible volume of flexible piece into the effect of spliced pole rotation amount, spliced pole and flabellum fixed connection, through power take off, the angular adjustment of flabellum is realized in telescoping device and flabellum revolution mechanic's linkage, avoid demolising the flabellum when carrying out angular adjustment to the flabellum.

Optionally, the fan blade rotating structure includes a spiral groove, the spiral groove is formed in the side wall of the blind hole, and the telescopic block portion is tightly attached to the side wall of each spiral groove.

Through adopting above-mentioned technical scheme, through setting up the helicla flute with flexible piece looks gomphosis, under the effect of telescoping device, flexible piece carries out concertina movement, and indirect flexible piece that makes slides along the helicla flute, because flexible piece does not rotate, so the spliced pole is rotatory along the helicla flute direction, and the rotation of spliced pole is realized to indirect, finally realizes the adjustment of flabellum angle.

Optionally, a compression spring is arranged in the blind hole, one end of the compression spring is fixedly connected to the bottom of the blind hole, the other end of the compression spring is fixedly connected with a gasket, and one end of the telescopic block tightly abuts against the gasket.

Through adopting above-mentioned technical scheme, the compression spring and the gasket that set up are used for restricting the flexible displacement of flexible piece, prevent that flexible piece displacement is too much and the rotation angle that indirectly leads to the flabellum surpasss safety requirement's adjustment range, and the compression spring who sets up has the cushioning effect, plays the protection to flexible piece.

Optionally, the power output device includes a driving motor and a driving bevel gear, the driving motor is fixedly connected in the fixed box, a rotating shaft of the driving motor is coaxially and fixedly connected with the driving bevel gear, the driving bevel gear is engaged with driven bevel gears with the same number as the fan blades, the number of teeth of each driven bevel gear is equal, each driven bevel gear is provided with the expansion device, and the shape and the length of the spiral groove in each blind hole are completely the same.

Through adopting above-mentioned technical scheme, the output of power can be realized to the driving motor and the drive bevel gear that set up, the number of teeth on the driven bevel gear that sets up is the same and all with the drive bevel gear meshing, and the spiral groove specification that sets up is also the same, can realize that the rotation amount of each driven bevel gear output is all the same, when making each telescoping device give the volume of advancing the same, can indirectly realize that the angular adjustment of each flabellum is synchronous, prevent that partial flabellum angular adjustment from appearing the deviation, make the flabellum atress inhomogeneous, cause the destruction to the flabellum.

Optionally, the telescopic device includes a lead screw, the lead screw is coaxially and fixedly connected with the driven bevel gear, the telescopic block is provided with a threaded blind hole along the axis direction of the blind hole, the lead screw is in threaded connection with the threaded blind hole, the lead screw is always located in the threaded blind hole, a plurality of support frames provided with through holes are further fixedly arranged in the fixed box, and each telescopic block passes through the through hole of each support frame respectively.

By adopting the technical scheme, the telescopic block can realize telescopic motion through the rotation of the screw rod.

Optionally, a limiting device is further arranged in the fixing box and comprises a driven gear, a rotating shaft is arranged between the driven gear and the driving bevel gear, the driven gear and the driving bevel gear are both fixedly connected with the rotating shaft in a coaxial mode, and the driven gear is connected with a clamping mechanism.

Through adopting above-mentioned technical scheme, stop device is including being used for the driven gear of giving screens mechanism transfer kinetic energy, on transmitting drive motor's kinetic energy to driven gear through the transmission shaft to carry out work through driven gear indirect drive screens mechanism.

Optionally, two clamping grooves are formed in the driving bevel gear, the clamping mechanism comprises two lifting shafts which are respectively inserted into the two clamping grooves, two external threads are arranged at one ends of the lifting shafts, two external threads of the lifting shafts are opposite in spiral direction, each lifting shaft is provided with a shaft gear, the shaft gear is meshed with the driven gear and is always meshed with the driven gear, two threaded holes are formed in the fixed box, two lifting shafts are provided with one ends of the external threads which are respectively in threaded connection with the two threaded holes, the lifting shafts are always connected with the threaded holes, and one end of each lifting shaft is far away from the corresponding external thread and is inserted into the tooth groove of the driving bevel gear.

Through adopting above-mentioned technical scheme, the screens mechanism that sets up carries out limit control through two lift axles, when driving motor drive lift axle carries out to rotate along its axis direction, because two epaxial external screw thread direction of rotation of lifting are opposite, consider that the lift axle that has indirectly realized both sides is in the motion state that rises and descend respectively, when the angle that the flabellum was rotated closes on the threshold value, a lift axle just can insert the tooth's socket of drive cone gear, prevent driving motor to rotate, it is spacing to realize, the same when driving motor reverses.

Optionally, the part of the telescopic block, which is tightly attached to the spiral groove, is a spherical block.

Through adopting above-mentioned technical scheme, flexible piece is spherical piece with the one end of helicla flute gomphosis, and spherical piece is littleer with helicla flute area of contact, and the frictional resistance that reducible flexible piece received at flexible in-process for the holistic feedback speed of mechanism is faster. .

In summary, the present application includes at least one of the following beneficial technical effects:

1. through power take off, telescoping device and the flabellum revolution mechanic that sets up in the fixed block, realize through the indirect flabellum of rotating to connect on the fixed block of spliced pole and carry out angular adjustment automatically, avoid demolising the adjustment with the flabellum, labour saving and time saving.

2. The synchronous adjustment of the angles of the fan blades is realized by the engagement of the driven gears and the driving bevel gear.

Drawings

FIG. 1 is an overall schematic diagram of an embodiment of the present application;

FIG. 2 is a sectional view of the fixing case in the embodiment of the present application;

FIG. 3 is an enlarged view of a portion of the embodiment of the present application at A in FIG. 2;

fig. 4 is a front sectional view of the fixing case according to the embodiment of the present application.

Description of reference numerals:

1. a fixing box; 11. a threaded hole; 2. a fan blade; 3. connecting columns; 31. blind holes; 4. a power take-off; 41. a drive motor; 42. a drive bevel gear; 43. a driven bevel gear; 5. a telescoping device; 51. a telescopic block; 52. a screw rod; 53. a threaded blind hole; 54. a support frame; 6. a fan blade rotating structure; 61. a helical groove; 62. a compression spring; 63. a gasket; 7. a limiting device; 71. a driven gear; 72. a rotating shaft; 73. a clamping mechanism; 731. a lifting shaft; 732. an external thread; 733. a shaft gear; 74. a card slot; 8. a spherical block.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a fan blade 2 for a cooling tower, referring to fig. 1 and 2, the fan blade 2 for the cooling tower comprises a cylindrical fixed box 1 and three rectangular and horizontally arranged fan blades 2, the axis of the fixed box 1 is arranged along the vertical direction, the end part of each fan blade 2 is fixedly provided with a cylindrical connecting column 3, the fixed box 1 is provided with circular through holes with the same number as the connecting columns 3, the circular through holes are distributed at equal intervals along the circumferential direction of the axis of the fixed box 1, and the axis of each circular through-hole is located same horizontal plane, and the one end that each spliced pole 3 deviates from flabellum 2 all rotates through the bearing and connects in each circular through-hole on fixed box 1, and spliced pole 3 has seted up blind hole 31 with the same number of flabellum 2 along its axis direction, and blind hole 31 communicates with each other with the inside of fixed box 1, is provided with power take off 4 in the fixed box 1, and power take off 4 is connected with three groups of identical telescoping devices 5.

Referring to fig. 2 and 3, telescoping device 5 includes scalable motion and is long banding flexible piece 51, flexible piece 51 is in blind hole 31 along blind hole 31 axial sliding connection, still be provided with in the blind hole 31 and be used for turning into the concertina movement of flexible piece 51 spliced pole 3 rotary motion's flabellum revolution mechanic 6, power take off 4 and telescoping device 5 and flabellum revolution mechanic 6 that set up in the fixed box 1 play respectively and provide power and transmit power for telescoping device 5, realize the concertina movement of flexible piece 51, change the flexible volume of flexible piece 51 into the effect of spliced pole 3 rotation volume, spliced pole 3 and flabellum 2 fixed connection, through power take off 4, the angular adjustment of flabellum 2 is realized in telescoping device 5 and the linkage of flabellum 2 revolution mechanic three.

Flabellum revolution mechanic 6 includes helicla flute 61, the lateral wall at blind hole 31 is seted up to helicla flute 61, the one end that flexible piece 51 is close to flabellum 2 is spherical piece 8, spherical piece 8 hugs closely each other with each lateral wall of helicla flute 61, blind hole 31 hole bottom is provided with compression spring 62, compression spring 62 one end fixed connection is at the hole bottom of blind hole 31, other end fixedly connected with gasket 63, spherical piece 8 tightly supports on gasket 63, concertina movement through flexible piece 51, make spherical piece 8 move along helicla flute 61, because spherical piece 8 hugs closely each other with each lateral wall of helicla flute 61, spherical piece 8 making concertina movement will drive spliced pole 3 rotatory along helicla flute 61 helical direction, indirectly realize the rotation of flabellum 2.

Referring to fig. 4 and 2, the power output device 4 includes a driving motor 41 and a driving bevel gear 42, the driving motor 41 is fixedly connected to the bottom of the fixing box 1, a rotating shaft of the driving motor 41 is coaxially and fixedly connected with the driving bevel gear 42, an axis of the rotating shaft of the driving motor 41 is vertically arranged and passes through the center of the fixing box 1, driven bevel gears 43 with the same number as the fan blades 2 are arranged on the driving bevel gear 42 in a meshed manner, the number of teeth of each driven bevel gear 43 is equal, and axes of each driven bevel gear 43 are located on the same horizontal plane. All be provided with telescoping device 5 on each driven bevel gear 43, telescoping device 5 includes lead screw 52, the coaxial fixed connection of lead screw 52 and driven bevel gear 43, flexible piece 51 has seted up threaded blind hole 53 along blind hole 31 axis direction, lead screw 52 and threaded blind hole 53 threaded connection, and lead screw 52 is located threaded blind hole 53 all the time, fixed box 1 bottom still fixes being provided with three support frame 54 of seting up the through-hole, each flexible piece 51 passes the through-hole of each support frame 54 respectively, and the through-hole of support frame 54 is the same with the cross-section of flexible piece 51.

The fixing box 1 is also internally provided with a limiting device 7, the limiting device 7 comprises a driven gear 71, a vertical rotating shaft 72 is arranged between the driven gear 71 and the driving bevel gear 42, the driven gear 71 and the driving bevel gear 42 are both coaxially and fixedly connected with the rotating shaft 72, and a clamping mechanism 73 is arranged on the driven gear 71.

The clamping mechanism 73 comprises two lifting shafts 731 which are inserted into tooth grooves of the driving bevel gear 42 and are vertically arranged, wherein one ends of the two lifting shafts 731 are provided with external threads 732, the directions of the external threads 732 of the two lifting shafts 731 are opposite, each lifting shaft 731 is provided with a straight-tooth shaft gear 733, each shaft gear 733 is meshed with the driven gear 71, the top cover of the fixing box 1 is provided with two threaded holes 11, one ends of the two lifting shafts 731 provided with the external threads 732 are respectively in threaded connection with the two threaded holes 11, the lifting shafts 731 are always connected with the threaded holes 11, the driving motor 41 drives the driven gear 71 to rotate, the two shaft gears 733 meshed with the driven gear 71 rotate, so that the lifting shafts 731 with the opposite directions of the two external threads 732 respectively realize ascending and descending, the driving bevel gear 42 is provided with two clamping grooves 74, and the two clamping grooves 74 are respectively corresponding to the positions of the lower end parts of the two lifting shafts 731, the clamping groove 74 can enable the lifting shaft 731 to be embedded into the clamping groove 74, when the driving motor 41 rotates for a certain angle, the descending lifting shaft 731 is just embedded into the clamping groove 74, the driving motor 41 is prevented from continuing to rotate, the telescopic motion of the telescopic block 51 is indirectly stopped, the fan blade 2 stops rotating and reaches the maximum rotation angle at the moment, the driving motor 41 reversely rotates still, and therefore the rotating range of the fan blade 2 is limited.

The implementation principle of the fan blade 2 for the cooling tower in the embodiment of the application is as follows: the top cover of the fixed box 1 is opened, the screw rod 52 is connected with the telescopic block 51 and penetrates through a through hole in a support frame 54 arranged in the fixed box 1, the fan blade 2 with the connecting column 3 is connected with a through hole arranged in the fixed box 1 through a bearing, the spherical block 8 on the telescopic block 51 is aligned to and installed in the spiral groove 61 in the connecting column 3, the power output device 4 is installed inside the fixed box 1, the driven bevel gear 43 is meshed with the driving bevel gear 42, the driven gear 71 is installed, the lifting shaft 731 is installed on the top cover and then matched with the driven gear 71, the top cover and the box body are fixed and then installed, when the angle of the fan blade 2 is adjusted, the driving motor 41 rotates to drive the telescopic block 51 of the telescopic device 5 to perform telescopic motion, and the adjustment of the angle of the fan blade 2 is indirectly controlled through the spiral groove 61.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A fan blade for a cooling tower, comprising: the fan blade fixing device comprises a fixing box (1) and a plurality of fan blades (2), wherein connecting columns (3) are fixedly arranged at the end parts of the fan blades (2), through holes with the same number as the connecting columns (3) are formed in the fixing box (1), one ends of the connecting columns (3) deviating from the fan blades (2) are respectively and rotatably connected into the through holes in the fixing box (1), a power output device (4) is arranged in the fixing box (1), the power output device (4) is connected with a plurality of telescopic devices (5), each telescopic device (5) comprises a telescopic block (51), each connecting column (3) is respectively provided with a blind hole (31) along the axial direction of the connecting column, the opening end of the blind hole (31) faces the inside of the fixing box (1), the telescopic blocks (51) are slidably connected into the blind hole (31) and slide along the axial direction of the blind hole (31), the blind hole (31) is also internally provided with a fan blade rotating structure (6) for converting the telescopic motion of the telescopic block (51) into the rotary motion of the connecting column (3).

2. A fan blade for a cooling tower as claimed in claim 1, wherein: the fan blade rotating structure (6) comprises a spiral groove (61), the spiral groove (61) is formed in the side wall of the blind hole (31), and the telescopic block (51) is partially tightly attached to the side wall of each spiral groove (61).

3. A fan blade for a cooling tower as claimed in claim 2, wherein: the blind hole (31) is internally provided with a compression spring (62), one end of the compression spring (62) is fixedly connected to the bottom of the blind hole (31), the other end of the compression spring (62) is fixedly connected with a gasket (63), and one end of the telescopic block (51) is tightly abutted to the gasket (63).

4. A fan blade for a cooling tower as claimed in claim 2, wherein: the power output device (4) comprises a driving motor (41) and a driving bevel gear (42), the driving motor (41) is fixedly connected in the fixing box (1), a rotating shaft of the driving motor (41) is coaxially and fixedly connected with the driving bevel gear (42), driven bevel gears (43) with the same number as the fan blades (2) are arranged on the driving bevel gear (42) in a meshed mode, the number of teeth of each driven bevel gear (43) is equal, the telescopic devices (5) are arranged on each driven bevel gear (43), and the shape and the length of the spiral grooves (61) in the blind holes (31) are completely the same.

5. The fan blade for a cooling tower of claim 4, wherein: the telescopic device (5) comprises a screw rod (52), the screw rod (52) is coaxially and fixedly connected with the driven bevel gear (43), a threaded blind hole (53) is formed in the telescopic block (51) along the axis direction of the blind hole (31), the screw rod (52) is in threaded connection with the threaded blind hole (53), the screw rod (52) is always located in the threaded blind hole (53), a plurality of supporting frames (54) with through holes are fixedly arranged in the fixing box (1), and each telescopic block (51) penetrates through the through hole of each supporting frame (54) respectively.

6. The fan blade for a cooling tower of claim 4, wherein: still be provided with stop device (7) in fixed box (1), stop device (7) include driven gear (71), driven gear (71) with be provided with axis of rotation (72) between drive bevel gear (42), driven gear (71) with drive bevel gear (42) both with axis of rotation (72) coaxial fixed connection, driven gear (71) are connected with screens mechanism (73).

7. The fan blade for a cooling tower of claim 6, wherein: two clamping grooves (74) are formed in the driving bevel gear (42), the clamping mechanism (73) comprises two lifting shafts (731) which are respectively inserted into the two clamping grooves (74), external threads (732) are arranged at one ends of the two lifting shafts (731), the external threads (732) of the two lifting shafts (731) are opposite in spiral direction, a shaft gear (733) is arranged on each lifting shaft (731), the shaft gear (733) is meshed with the driven gear (71), the shaft gear (733) is always meshed with the driven gear (71), two threaded holes (11) are formed in the fixing box (1), one end of each lifting shaft (731) provided with the external thread (732) is respectively in threaded connection with the two threaded holes (11), and the lifting shafts (731) are always connected with the threaded holes (11), one end of the lifting shaft (731), which is far away from the external thread (732), is inserted into the tooth grooves of the driving bevel gear (42).

8. A fan blade for a cooling tower as claimed in claim 2, wherein: the part of the telescopic block (51) clinging to the spiral groove (61) is a spherical block (8).