CN219509878U - Moving blade adjusting structure suitable for blower of power station with lower load - Google Patents

Abstract

The utility model provides a be applicable to and contain movable vane regulation structure of lower load power station forced draught blower, solves the unit low load operation condition that prior art exists under, and the too big, unable aperture regulation and the energy-conserving requirement when low load operation of output of fan, and the too high problem of complete machine replacement cost. The fan comprises a plurality of groups of fan blades arranged in a main body air duct, wherein the end parts of the fan blades are movably arranged on the outer circumference of a blade hub through blade adjusting rotating shafts, and the blade adjusting rotating shafts are also connected with driving ends of movable blade adjusting mechanisms respectively; the axis of rotation in blade wheel hub middle part passes through the bearing box and links to each other with the output of main motor, and fan blade and blade wheel hub's both sides are provided with inlet box and diffuser respectively. The device has reasonable design and compact structure, can meet various load condition working conditions of the unit, can particularly meet the low load working condition operation requirement of the unit, has wider adjusting range, good adjusting and energy-saving effects and low changing cost.

Description

Moving blade adjusting structure suitable for blower of power station with lower load

Technical Field

The utility model belongs to the technical field of axial flow fans, and particularly relates to a movable blade adjusting structure which can meet various load condition working conditions of a unit, can be particularly suitable for low-load working condition operation requirements of the unit, has wider adjusting range, good adjusting performance and energy-saving effect and low changing cost, and is suitable for a blower of a power station with lower load.

Background

At present, most of movable blade regulating axial flow blowers and primary blowers used in power stations in China are basically foreign introduction technologies, and positive similar design calculation methods are adopted for model selection in the fan design stage of large fan manufacturers. In general, the dynamic air-conditioning fan has high efficiency, good adjustable performance, wide range, stable operation and excellent performance. However, with the wide application of the dynamic fan adjusting technology, more and more users reflect that the actual parameters of equipment and the theoretical design parameters have larger deviation, so that the problem of 'large maraca' exists in a unit, particularly under the condition of low-load operation of the unit, the output of the fan is overlarge, a certain movable blade opening adjustment interval is not available, the adjustment performance is poor, the energy consumption is high, the additional investment is increased, and the opening adjustment and energy saving requirements during low-load operation cannot be met; meanwhile, if the whole machine is replaced, the cost is too high. There is a need for improvements in prior art bucket conditioning system arrangements and buckets.

Disclosure of Invention

Aiming at the problems, the utility model provides the movable blade adjusting structure which can meet various load condition working conditions of the unit, can be particularly suitable for low-load working condition operation requirements of the unit, has wider adjusting range, good adjusting performance and energy-saving effect and low changing cost, and is suitable for the blower of the power station with lower load.

The technical scheme adopted by the utility model is as follows: this movable vane adjustment structure suitable for contain lower load power station forced draught blower is including setting up a plurality of fan blade of group inside main part dryer, its characterized in that: the end parts of the fan blades are movably arranged on the outer circumference of the blade hub through blade adjusting rotating shafts arranged in the radial direction respectively, and the blade adjusting rotating shafts are connected with the driving ends of the movable blade adjusting mechanisms respectively; and the rotation shaft in the middle of the blade hub is connected with the output end of the main motor through a bearing box, and the two sides of the fan blade and the blade hub are respectively provided with an air inlet box and a diffuser.

The movable blade adjusting mechanism comprises a movable adjusting disc, the middle part of the movable adjusting disc is connected with the telescopic end of an adjusting disc shifting hydraulic cylinder which is axially arranged, and the outer circumference of the movable adjusting disc is connected with the end part of the blade adjusting rotating shaft through adjusting crank arms which are rotatably arranged; the fixed end of the adjusting disk shifting hydraulic cylinder is provided with a slide valve driving rod for controlling a slide valve in the hydraulic cylinder, the outer end part of the slide valve driving rod is provided with a liquid supply connector, the liquid supply connector is hinged with one end of an adjusting pull fork, the other end of the adjusting pull fork is hinged with the swinging end of an adjusting swing arm, the swinging end of the adjusting swing arm is connected with one end of an adjusting driving long shaft, and the other end of the adjusting driving long shaft is connected with the output end of a servo driving device through a coupler. The servo driving device is used for driving the adjusting driving long shaft to rotate, and further the adjusting pull fork is driven to move through the swinging of the adjusting swing arm, so that the slide valve driving rod controls the slide valve in the adjusting disc shifting hydraulic cylinder, and the telescopic end of the adjusting disc shifting hydraulic cylinder extends or retracts to drive the moving adjusting disc to move forwards and backwards along the axial direction; and the blade adjusting rotating shaft and the fan blade on the blade adjusting rotating shaft are driven by the adjusting crank arm which is rotationally arranged on the circumference of the outer side of the movable adjusting disc to rotate at a certain angle together.

The adjusting crank arm comprises a crank arm main body which is obliquely arranged, one end of the crank arm main body is provided with an adjusting disc hinge shaft, the other end of the crank arm main body is provided with a blade rotating shaft connecting part, a rotating shaft connecting hole is further formed in the blade rotating shaft connecting part, a connecting key groove is formed in the inner wall of the rotating shaft connecting hole, and a fixing key pin hole is further formed in the side portion of the connecting key groove. The lower end of the adjusting crank arm is hinged on a crank arm hinge part arranged on the circumference of the outer side of the movable adjusting disc through an adjusting disc hinge shaft; the upper end of the adjusting crank arm is fixedly connected with the lower end of the blade adjusting rotating shaft by utilizing a rotating shaft connecting hole on the blade rotating shaft connecting part and a connecting key arranged in the connecting key groove, and further the blade adjusting rotating shaft and a fan blade on the blade adjusting rotating shaft are driven to rotate on a blade hub by utilizing the adjusting crank arm which moves forwards and backwards along with the moving adjusting disc and is arranged in a rotating oblique way, so that the running requirement of a low-load working condition of a unit is met by adjusting the blade pitch angle.

The movable adjusting disc is provided with a guide column at one side which is not provided with an adjusting disc shifting hydraulic cylinder, and the guide column is axially inserted and arranged at the end part of the middle rotating shaft of the blade hub. In order to move the adjusting disk and shift the flexible in-process of pneumatic cylinder along with the adjusting disk, move the direction through the guide post, and then do benefit to the steady removal of removing the adjusting disk.

The angle display disc is arranged at one end of the adjusting driving long shaft, which is connected with the servo driving device, and comprises a fixed sector dial, an angle pointer is rotatably arranged on the sector dial, and a pointer rotating shaft of the angle pointer is connected with the end part of the adjusting driving long shaft. The fan blade rotary switch angle is indicated on the sector dial by the angle pointer which can swing reciprocally along with the rotation of the adjusting driving long shaft, so that the fan can be conveniently adjusted.

The adjusting driving long shaft is horizontally arranged along the radial direction of the diffuser and sequentially passes through the diffusion inner cylinder and the diffusion outer cylinder of the diffuser. So as to facilitate the driving of the servo driving device to the adjusting swing arm and improve the use reliability of the device.

The fan blade includes the blade main part, and the lower extreme of blade main part is provided with the blade chassis, and the downside on blade chassis is provided with the blade pivot spread groove that is used for linking to each other with blade regulation pivot upper end, and still is provided with a plurality of groups of fixed connection holes on the blade chassis. The lower end of the fan blade is fixedly arranged at the upper end part of the blade adjusting rotating shaft through the connecting bolts arranged in the fixed connecting holes of the blade chassis, and the blade rotating shaft bearing is arranged between the blade adjusting rotating shaft and the blade hub, so that when the running condition parameters change, the formed blade main body is manufactured by utilizing a new distortion rule based on the specific parameters, and the blade adjusting rotating shaft is matched to realize the opening and closing action of the angle of the movable blade, so that the fan blade has a wider angle adjusting range.

The utility model has the beneficial effects that: because the utility model adopts a plurality of groups of fan blades arranged in the main body wind barrel, the end parts of the fan blades are respectively and movably arranged on the outer circumference of the blade hub through the blade adjusting rotating shafts, and the blade adjusting rotating shafts are respectively connected with the driving ends of the movable blade adjusting mechanisms; the rotation axis at blade wheel hub middle part passes through the bearing box and links to each other with the output of main motor, and fan blade and blade wheel hub's both sides set up the structural style of inlet box and diffuser respectively, so its reasonable in design, compact structure to a mode that has less change cost and be effective has solved puzzlement user's big malar dolly ' problem effectively, can satisfy the various load condition operating modes of unit, especially can adapt to the low load operating mode operation requirement of unit, has wider accommodation, and adjustability and energy-conserving effect are good.

Drawings

Fig. 1 is a schematic view of a structure of the present utility model.

Fig. 2 is a cross-sectional view taken along line B-B of fig. 1.

Fig. 3 is an enlarged structural cross-sectional view at a in fig. 1.

Fig. 4 is a D-view of fig. 3.

Fig. 5 is a sectional view taken along line C-C of fig. 2 (a schematic view of a structure of the angle display disc).

Fig. 6 is a cross-sectional view of fig. 3 taken along line E-E.

Fig. 7 is a schematic view of a structure of the adjusting lever of fig. 6.

Fig. 8 is a bottom view of fig. 7.

FIG. 9 is a schematic view of a configuration of the fan blade of FIG. 3.

Fig. 10 is a top view of fig. 9.

Fig. 11 is a cross-sectional view of fig. 9 taken along line F-F.

The serial numbers in the figures illustrate: 1 air inlet box, 2 bearing box, 3 fan blade, 4 main body dryer, 5 diffuser, 6 movable vane adjustment mechanism, 7 servo drive, 8 shaft coupling, 9 angle display disc, 10 adjustment drive major axis, 11 diffusion urceolus, 12 diffusion inner tube, 13 adjustment swing arm, 14 adjustment pull fork, 15 liquid feed connector, 16 slide valve driving rod, 17 adjustment disc shift hydraulic cylinder, 18 movement adjustment disc, 19 adjustment crank arm, 20 blade adjustment pivot, 21 guide post, 22 blade hub, 23 counter weight, 24 fan scale disc, 25 angle pointer, 26 pointer pivot, 27 crank arm articulated part, 28 blade pivot bearing, 29 crank arm main body, 30 adjustment disc articulated shaft, 31 blade pivot connecting part, 32 pivot connecting hole, 33 connecting key groove, 34 fixed key pin hole, 35 blade main body, 36 blade chassis, 37 blade pivot connecting groove, 38 fixed connecting hole.

Detailed Description

The specific structure of the present utility model will be described in detail with reference to fig. 1 to 11. This movable vane adjustment structure suitable for contain lower load power station forced draught blower includes a plurality of groups of fan blade 3 that set up inside main part dryer 4, and the tip of fan blade 3 is respectively through the blade regulation pivot 20 that arranges along radial, activity setting on the outer circumference of blade wheel hub 22. The fan blade 3 is composed of a blade main body 35, and a circular blade chassis 36 is arranged at the lower end of the blade main body 35; the lower side of the blade chassis 36 is provided with a blade rotating shaft connecting groove 37 for connecting with the upper end of the blade adjusting rotating shaft 20, and the blade chassis 36 is also provided with four groups of fixed connecting holes 38 arranged along the same circumference. Thus, the lower ends of the fan blades 3 are respectively fixedly arranged at the upper end parts of the corresponding blade adjusting rotating shafts 20 through connecting bolts arranged in the fixed connecting holes 38 of the blade chassis 36; meanwhile, a blade rotation shaft bearing 28 is provided between the blade adjustment rotation shaft 20 and the blade hub 22. When the operating condition parameters change, the blade main body 35 which is manufactured based on the new distortion rule under the specific parameters, has small geometric dimension and high working efficiency is utilized to cooperate with the blade adjusting rotating shaft 20 to realize the opening and closing actions of the angles of the movable blades, so that the fan blades have wider angle adjusting range.

The blade adjusting rotating shafts 20 connected with the lower end parts of the fan blades 3 are also respectively connected with the driving ends of the movable blade adjusting mechanisms 6. The movable blade adjusting mechanism 6 comprises a movable adjusting disc 18 arranged on one side of the middle part of a blade hub 22, and the middle part of the movable adjusting disc 18 is connected with the telescopic end of an adjusting disc shifting hydraulic cylinder 17 arranged along the axial direction; the outer circumference of the movable adjusting disk 18 is connected with the lower end of the blade adjusting rotating shaft 20 through the adjusting crank arms 19 which are rotatably arranged. And, on the removal regulating plate 18, do not set up the regulating plate and shift the one side of pneumatic cylinder 17 and be provided with guide post 21, guide post 21 peg graft along the axial and set up the tip at blade wheel hub 22 middle part axis of rotation, and then at the in-process that the removal regulating plate 18 is flexible along with regulating plate shift pneumatic cylinder 17, carry out the removal direction through guide post 21 to do benefit to the steady removal of removal regulating plate 18.

The adjusting crank arm 19 is composed of a crank arm main body 29 which is obliquely arranged, one end of the crank arm main body 29 is provided with an adjusting disc hinge shaft 30, and the other end of the crank arm main body 29 is provided with a blade rotating shaft connecting part 31; the blade rotating shaft connecting portion 31 is further provided with a rotating shaft connecting hole 32, the inner wall of the rotating shaft connecting hole 32 is provided with a connecting key groove 33, and the side part of the connecting key groove 33 is further provided with a fixed key pin hole 34. Thus, the lower end of the adjusting crank arm 19 is hinged on the crank arm hinge part 27 arranged on the outer circumference of the movable adjusting plate 18 through the adjusting plate hinge shaft 30, and the upper end of the adjusting crank arm 19 is fixedly connected with the lower end of the blade adjusting rotary shaft 20 through the rotary shaft connecting hole 32 on the blade rotary shaft connecting part 31 and the connecting key arranged in the connecting key groove 33, and the connecting key is fastened through the fixing pin arranged in the fixing key pin hole 34. The blade adjusting rotating shaft 20 and the fan blade 3 on the blade adjusting rotating shaft are driven to rotate on the blade hub 22 by utilizing the obliquely arranged adjusting crank arm 19 which moves forwards and backwards along with the moving adjusting disc 18, so that the operation requirement of the low-load working condition of the unit is adapted through blade pitch angle adjustment.

In addition, the fixed end of the adjusting disk shifting hydraulic cylinder 17 is also provided with a slide valve driving rod 16 for controlling a slide valve in the hydraulic cylinder, the outer end part of the slide valve driving rod 16 is provided with a liquid supply connector 15 with a rotary oil seal, and the liquid supply connector 15 is hinged with one end of the adjusting pull fork 14; the other end of the adjusting pull fork 14 is hinged with the swing end at the upper part of the adjusting swing arm 13, and the swing end at the lower part of the adjusting swing arm 13 is connected with one end of the adjusting driving long shaft 10; the adjustment swing arm 13 is further provided with a weight 23 for preventing the adjustment drive long shaft 10 from rattling. The adjusting driving long shaft 10 is arranged along the radial direction and the horizontal direction of the diffuser 5 and sequentially passes through the diffusion inner cylinder 12 and the diffusion outer cylinder 11 of the diffuser 5; so as to facilitate the driving of the adjusting swing arm 13 by the servo driving device 7 and improve the use reliability of the device. At the same time, the other end of the adjusting drive long shaft 10 is also connected with the output end of the servo drive device 7 fixed on the outer shell of the diffuser 5 through a coupler 8. Further, the servo driving device 7 is utilized to drive the adjusting driving long shaft 10 to rotate, so that the adjusting pull fork 14 is driven to move by adjusting the swing of the swing arm 13, the slide valve driving rod 16 controls the slide valve in the adjusting disc shifting hydraulic cylinder 17, the telescopic end of the adjusting disc shifting hydraulic cylinder 17 extends or retracts, and the moving adjusting disc 18 is driven to move forwards and backwards along the axial direction; and the blade adjusting rotating shaft 20 and the fan blade 3 thereon are driven to rotate together by a certain angle by utilizing the adjusting crank arm 19 which is rotatably arranged on the circumference of the outer side of the movable adjusting disk 18.

An angle display disk 9 is arranged on one end of the adjustment drive long shaft 10, which is connected with the servo drive device 7. The angle display disc 9 comprises a fixed sector dial 24, an angle pointer 25 is rotatably arranged on the sector dial 24, and a pointer rotating shaft 26 at the lower end of the angle pointer 25 is connected with the end part of the adjusting driving long shaft 10, so that the angle of the fan blade 3 rotating switch can be indicated on the sector dial 24 through the angle pointer 25 which can reciprocate along with the rotation of the adjusting driving long shaft 10, and the adjustment of the fan is facilitated. Moreover, the rotation shaft in the middle of the blade hub 22 is connected with the output end of the main motor through a bearing box 2, and the two sides of the fan blade 3 and the blade hub 22 are respectively provided with an air inlet box 1 and a diffuser 5.

When the movable blade adjusting structure suitable for the blower of the power station with lower load is used, firstly, the output shaft of the servo driving device 7 outputs clockwise/anticlockwise rotation with a certain angle and transmits the clockwise/anticlockwise rotation to the adjusting swing arm 13 through the adjusting driving long shaft 10; subsequently, the adjusting swing arm 13 pulls/pushes the adjusting pull fork 14, and then the slide valve driving rod 16 drives the adjusting disc to shift the slide valve in the hydraulic cylinder 17 to open, so that hydraulic oil enters or flows out of the hydraulic cylinder through the oil inlet and the oil outlet of the liquid supply connector 15, and retraction/extension actions of the hydraulic cylinder are realized until the slide valve oil port is closed again to stop actions. Meanwhile, the straight travel motion of the retraction/extension of the adjusting disc displacement hydraulic cylinder 17 is transmitted to each adjusting crank arm 19 through the moving adjusting disc 18 connected with the telescopic end of the adjusting disc displacement hydraulic cylinder 17, so that the adjusting crank arm 19 and the blade adjusting rotating shaft 20 connected with the upper end of the adjusting crank arm rotate clockwise/anticlockwise around the axis of the adjusting rotating shaft together, and each fan blade 3 is driven to make an on/off angle motion, and the adjustment of the blade pitch angle is realized. The movable blade adjusting structure with the novel fan blade 3 can effectively solve the defect that the original design cannot be improved according to actual working condition parameters and limited by existing conditions, can conveniently design the blade and the adjusting system of the novel movable blade adjusting axial flow fan, and enables the improved fan to fully meet the operation requirements of the working conditions of each load condition of the unit by means of lower transformation cost and no whole machine replacement, particularly in a low-load working condition area, compared with the fan in the prior art, the fan output can be continuously adjusted down, and further energy conservation and emission reduction are realized; further, the opening degree adjustment section is sufficient, and the operability is good.

Claims (7)

1. The utility model provides a movable vane adjusting structure suitable for contain lower load power station forced draught blower, includes a plurality of fan blade (3) of group that set up inside main part dryer (4), its characterized in that: the end parts of the fan blades (3) are movably arranged on the outer circumference of the blade hubs (22) through blade adjusting rotating shafts (20) which are arranged along the radial direction respectively, and the blade adjusting rotating shafts (20) are also connected with the driving ends of the movable blade adjusting mechanisms (6) respectively; and the rotation shaft in the middle of the blade hub (22) is connected with the output end of the main motor through a bearing box (2), and the two sides of the fan blade (3) and the blade hub (22) are respectively provided with an air inlet box (1) and a diffuser (5).

2. The blade conditioning structure for a blower for a power station having a lower load according to claim 1, wherein: the movable blade adjusting mechanism (6) comprises a movable adjusting disc (18), the middle part of the movable adjusting disc (18) is connected with the telescopic end of an adjusting disc shifting hydraulic cylinder (17) which is axially arranged, and the outer circumference of the movable adjusting disc (18) is connected with the end part of the blade adjusting rotating shaft (20) through adjusting crank arms (19) which are rotatably arranged; the fixed end of the adjusting disc shifting hydraulic cylinder (17) is provided with a slide valve driving rod (16) for controlling a slide valve in the hydraulic cylinder, the outer end part of the slide valve driving rod (16) is provided with a liquid supply connector (15), the liquid supply connector (15) is hinged with one end of the adjusting pull fork (14), the other end of the adjusting pull fork (14) is hinged with the swinging end of the adjusting swing arm (13), the swinging end of the adjusting swing arm (13) is connected with one end of the adjusting driving long shaft (10), and the other end of the adjusting driving long shaft (10) is connected with the output end of the servo driving device (7) through a coupler (8).

3. The blade conditioning structure for a blower for a power station having a lower load according to claim 2, wherein: the adjusting crank arm (19) comprises a crank arm main body (29) which is obliquely arranged, one end of the crank arm main body (29) is provided with an adjusting disc hinge shaft (30), the other end of the crank arm main body (29) is provided with a blade rotating shaft connecting part (31), the blade rotating shaft connecting part (31) is further provided with a rotating shaft connecting hole (32), the inner wall of the rotating shaft connecting hole (32) is provided with a connecting key groove (33), and the side part of the connecting key groove (33) is further provided with a fixed key pin hole (34).

4. The blade conditioning structure for a blower for a power station having a lower load according to claim 2, wherein: the movable adjusting disc (18) is provided with a guide column (21) at one side which is not provided with an adjusting disc shifting hydraulic cylinder (17), and the guide column (21) is axially inserted and arranged at the end part of the middle rotating shaft of the blade hub (22).

5. The blade conditioning structure for a blower for a power station having a lower load according to claim 2, wherein: an angle display disc (9) is arranged at one end, connected with the servo driving device (7), of the adjusting driving long shaft (10), the angle display disc (9) comprises a fixed sector dial (24), an angle pointer (25) is rotatably arranged on the sector dial (24), and a pointer rotating shaft (26) of the angle pointer (25) is connected with the end of the adjusting driving long shaft (10).

6. The blade conditioning structure for a blower for a power station having a lower load according to claim 2, wherein: the adjusting driving long shaft (10) is horizontally arranged along the radial direction of the diffuser (5) and sequentially penetrates through the diffusion inner cylinder (12) and the diffusion outer cylinder (11) of the diffuser (5).

7. The blade conditioning structure for a blower for a power station having a lower load according to claim 1, wherein: the fan blade (3) comprises a blade main body (35), a blade chassis (36) is arranged at the lower end of the blade main body (35), a blade rotating shaft connecting groove (37) used for being connected with the upper end of the blade adjusting rotating shaft (20) is arranged at the lower side of the blade chassis (36), and a plurality of groups of fixed connecting holes (38) are further formed in the blade chassis (36).