CN219974904U - Be used for external adjustment mechanism of axial fan blade disc type - Google Patents
Be used for external adjustment mechanism of axial fan blade disc type Download PDFInfo
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- CN219974904U CN219974904U CN202321270933.3U CN202321270933U CN219974904U CN 219974904 U CN219974904 U CN 219974904U CN 202321270933 U CN202321270933 U CN 202321270933U CN 219974904 U CN219974904 U CN 219974904U
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- 230000007246 mechanism Effects 0.000 title claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000000338 in vitro Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model provides an external adjusting mechanism for a blade disc of an axial flow fan, which comprises the following components: the steel blade is provided with a blade handle shaft, and the blade handle shaft comprises a positioning shaft section and a fixing shaft section; the hub surface is provided with a shaft hole and a positioning hole, and a disc type blade handle sleeve is arranged on the inner side of the shaft hole of the hub surface; the disc type pressing plate is contacted with the disc type leaf handle sleeve, the disc type pressing plate is provided with an adjusting groove, and a stepped groove is formed in the round edge of the outer side of the other end of the disc type pressing plate; the poking piece is arranged on the stepped groove of the disc type pressing plate; a poking block provided with a threaded hole; the adjusting bolt penetrates through the hub surface, the disc type blade handle sleeve and the disc type pressing plate and is screwed by the poking block threaded hole; and the fastening nut is arranged on the fixed shaft section of the steel blade vane stem and comprises a first fastening nut and a second fastening nut. The utility model realizes the external adjustment of the blade angle and solves the problems that the blade root gap of the existing taper sleeve structure cannot be adjusted, the blade root gap is overlarge, the adjusting time is long and the like.
Description
Technical Field
The utility model relates to the field of axial flow fans for mines, in particular to a blade disc type in-vitro adjusting mechanism for an axial flow fan.
Background
In the mining axial flow fan industry, many customers require blade adjustment (external adjustment for short) without pulling the fan two-stage main machine apart. The existing steel blade adjusting technology in the fan industry is divided into two types, wherein the first type is that a steel blade is connected with a hub, and two large nuts are adopted to be screwed with blade handles at the lower ends of the blades, so that the fan is locked and fixed. The second is that the petiole of blade lower extreme does not take the screw thread, and the petiole inserts in the hub surface, and the inside welding of hub surface has interior taper type petiole cover, and the petiole passes through locking plate, outer taper sleeve and interior taper type petiole cover locking as an organic whole, has four bolts to screw up the back on the hub surface, can tightly be in the same place outer taper sleeve and petiole cover inner taper surface top that interior taper type petiole cover and petiole locking as an organic whole. When the fan is in operation, the blades are prevented from rotating and flying out.
In the prior art, the first steel blade fixing mode cannot realize external adjustment, while the second steel blade fixing mode can realize external adjustment, but has the defects that the gap between hub surfaces is increased, the gap between blade roots is increased for short, and the gap between blade roots cannot be adjusted once the blade roots are machined.
The utility model aims to solve the problems, and provides a blade disc type external adjusting mechanism for an axial flow fan, which can be used for adjusting the blade angle under the condition that a secondary main engine of the fan is not pulled open, and solves the problems that the blade root gap of the existing taper sleeve structure cannot be adjusted, the blade root gap is overlarge, the adjusting time is long and the like.
Disclosure of Invention
The utility model provides a blade disc type external adjusting mechanism for an axial flow fan, which changes the problems of the original taper sleeve structure, difficult processing and large space occupation of parts on the hub surface, can adjust the gap of a blade root, and has the advantages of simple manufacture, convenient adjustment, low cost compared with the prior art, and stable and reliable operation after practical application.
In order to achieve the above object, the present utility model provides an in vitro adjusting mechanism for a blade disc of an axial flow fan, comprising:
the steel blade is provided with a blade handle shaft which is in a ladder shape, the blade handle shaft comprises a positioning shaft section and a fixed shaft section, the diameter of the positioning shaft section is larger than that of the fixed shaft section, and threads are arranged at the tail part of the fixed shaft section;
the hub surface is a fan hub surface, the hub surface is provided with a shaft hole and a positioning hole, a disc type blade handle sleeve is arranged at the inner side of the shaft hole of the hub surface, one end of the disc type blade handle sleeve penetrates through the shaft hole of the hub surface and is fixed at the inner side surface of the hub surface, the disc type petiole sleeve is provided with a through hole, the petiole positioning shaft section is in contact with one end of the disc type petiole sleeve, the petiole fixing shaft section penetrates through the first through hole of the disc type petiole sleeve, and the disc type petiole sleeve is symmetrically provided with fixing holes along the circle center;
the disc type pressing plate is identical to the disc type petiole sleeve in size and shape, a second through hole is formed in the circle center of the disc type pressing plate, one end of the disc type pressing plate is in contact with the disc type petiole sleeve, the second through hole of the disc type pressing plate is corresponding to the first through hole of the disc type petiole sleeve in position and size, an adjusting groove is symmetrically formed in the disc type pressing plate along the circle center of the second through hole, the center of the adjusting groove of the disc type pressing plate is identical to the circle center of the fixing hole of the disc type petiole sleeve, the adjusting groove is arc-shaped, and a stepped groove is formed in the circle edge of the outer side of the other end of the disc type pressing plate;
the poking piece is arranged on the stepped groove of the disc type pressing plate, the poking piece and the adjusting groove are positioned on the same horizontal line, and the poking piece is arc-shaped;
the device comprises a poking block, wherein one end of the poking block is provided with a spherical surface, one end of the poking block is contacted with an arc-shaped part of the poking sheet, and the poking block is provided with a threaded hole;
the adjusting bolt passes through the positioning hole arranged on the hub surface, the fixing hole of the disc type blade handle sleeve and the adjusting groove of the disc type pressing plate and is screwed by the shifting block threaded hole; and
the fastening nut is arranged at the thread of the fixed shaft section of the steel blade vane stem, the disc type pressing plate is tightly pressed by the fastening nut, and the fastening nut comprises a first fastening nut and a second fastening nut.
Further, the first fastening nut is provided with a pin hole.
Further, the external adjusting mechanism for the axial flow fan blade disc type further comprises a pin shaft, the pin shaft is conical, and the pin shaft is arranged in the pin hole of the first fastening nut.
Preferably, the external adjusting mechanism for the axial flow fan blade disc type further comprises a gasket, the gasket comprises a flat pad and a spring pad, the fastening nut is provided with the spring pad, the adjusting bolt is provided with the spring pad, and the pin shaft is provided with the flat pad and the spring pad.
Compared with the prior art, the disc type external adjusting mechanism for the axial flow fan blade is provided with the disc type blade handle shaft sleeve, the disc type blade handle shaft sleeve is connected with the hub surface through the steel blade handle shaft and is positioned, the disc type blade handle sleeve is small in structure and size and easy to process, the occupied hub surface is small in space and low in processing cost, meanwhile, the blade root gap can be adjusted, the operation is stable and reliable, the disc type pressing plate is provided with the adjusting groove and the poking piece, the angle of the steel blade is adjusted at the later stage, and then the fixing nut, the adjusting bolt, the poking block and the pin shaft are used for fixing and locking, so that the stability of the blade is ensured, the autorotation of the blade is prevented, the risk of personnel attached to the axial flow fan is reduced, and the stability and the service life of the axial flow fan are improved.
Drawings
FIG. 1 is a schematic view of the overall structure of a disk-type in-vitro adjusting mechanism for an axial flow fan blade according to the present utility model;
FIG. 2 is a schematic top view of a single steel blade for an axial flow fan blade disc type in vitro adjusting mechanism;
FIG. 3 is a schematic cross-sectional view of a single steel blade for an axial flow fan blade disc type in vitro adjustment mechanism according to the present utility model;
FIG. 4 is a schematic view of a partial enlarged structure of a disk-type in-vitro adjusting mechanism for an axial flow fan blade according to the present utility model; and
fig. 5 is a schematic bottom view of an external adjusting mechanism for axial flow fan blade disc type.
Reference numerals:
1. steel blades; 101. a stem; 102. positioning the shaft section; 103. a stationary shaft section;
2. a hub surface; 201. a shaft hole; 202. positioning holes;
3. disc type leaf stalk sleeve; 301. a first through hole; 302. a fixing hole;
4. a disc-type pressing plate; 401. a second through hole 402; 403. a stepped groove;
5. a pulling piece; 6. a shifting block; 601. a threaded hole;
7. an adjusting bolt; 8. a fastening nut; 801. a first fastening nut; 802. a second fastening nut;
9. a pin hole; 10. a pin shaft; 11. and a gasket.
Detailed Description
For a further understanding of the objects, construction, features, and functions of the utility model, reference should be made to the following detailed description of the preferred embodiments.
Referring to fig. 1, 2, 3, 4 and 5, an in vitro adjusting mechanism for a blade disc of an axial flow fan according to an embodiment of the present utility model includes:
as shown in fig. 4, the steel blade 1 is provided with a handle shaft 101, the handle shaft 101 is in a step shape, the handle shaft 101 comprises a positioning shaft section 102 and a fixed shaft section 103, the diameter of the positioning shaft section 102 is larger than that of the fixed shaft section 103, and threads are arranged at the tail part of the fixed shaft section 103; the positioning shaft section is convenient for positioning the steel blade on the hub surface, and the fixing shaft section is used for fixing the steel blade;
the hub surface 2 is a fan hub surface, as shown in fig. 2 and 4, the hub surface 2 is provided with a shaft hole 201 and a positioning hole 202, a disc type blade sleeve 3 is arranged on the inner side of the shaft hole 201 of the hub surface, one end of the disc type blade sleeve 4 penetrates through the shaft hole 201 of the hub surface 2 and is fixed on the inner side surface of the hub surface 2, the disc type blade sleeve 3 is provided with a first through hole 301, the blade shaft positioning shaft section 102 is contacted with one end of the disc type blade sleeve 3, the blade shaft fixing shaft section 103 penetrates through the first through hole 301 of the disc type blade sleeve 3, and the disc type blade sleeve 3 is symmetrically provided with a fixing hole 302 along the circle center; the disc type blade stem sleeve adopts a disc type shape with the shaft sleeve, so that the whole structure and the volume are reduced, the blade root gap is adjusted, the structure is more compact, and the processing period is shortened;
the disc-type pressing plate 4 is as shown in fig. 5, the size and shape of the disc-type pressing plate 4 are the same as those of the disc-type petiole sleeve 3, a second through hole 401 is formed in the circle center of the disc-type pressing plate 4, one end of the disc-type pressing plate 4 is in contact with the disc-type petiole sleeve 3, the second through hole 401 of the disc-type pressing plate 4 corresponds to the first through hole 301 of the disc-type petiole sleeve 3 in size, an adjusting groove 402 is symmetrically formed in the circle center of the second through hole along the disc-type pressing plate 4, the position of the center of the adjusting groove 401 of the disc-type pressing plate 4 is the same as that of the circle center of the fixing hole 302 of the disc-type petiole sleeve 3, the adjusting groove 402 is arc-shaped, and a stepped groove 403 is formed in the circle edge of the outer side of the other end of the disc-type pressing plate 4; the disc type pressing plate is matched with the disc type blade handle shaft sleeve, so that the steel blade is stably fixed on the hub surface, a certain protection effect is achieved on the disc type blade handle shaft sleeve, and the service life is prolonged;
the poking plate 5 is arranged on the stepped groove 403 of the disc-type pressing plate 4, as shown in fig. 5, the poking plate 5 and the adjusting groove 402 are positioned on the same horizontal line, and the poking plate 5 is arc-shaped; the poking plate is arranged on the disc-type pressing plate and plays a certain limiting role;
the poking block 6, as shown in fig. 2, one end of the poking block 6 is provided with a spherical surface feature, one end of the poking block 6 is contacted with the arc-shaped part of the poking sheet 5, and the poking block 6 is provided with a threaded hole 601; the poking block is matched with the poking piece and the adjusting groove on the disc-type pressing plate, so that the angle of the steel blade can be adjusted;
the adjusting bolt 7, as shown in fig. 3, the adjusting bolt 7 passes through the positioning hole 202 arranged on the hub surface 2, the fixing hole 302 of the disc type blade stem sleeve 3 and the adjusting groove 402 of the disc type pressing plate 4 to be screwed by the screw hole 601 of the shifting block 6; the adjusting bolt and the shifting block with spherical surface feature fasten the disc type blade stem sleeve and the disc type pressing plate; and
the fastening nut 8, as shown in fig. 3, the fastening nut 8 is provided at the screw thread of the fixed shaft section 103 of the shank 101 of the steel blade 1, the fastening nut 8 compresses the disk platen 4, and the fastening nut 8 includes a first fastening nut 801 and a second fastening nut 802. The fastening nut is arranged at the fixed shaft section of the fastening blade stem to prevent the steel blade from rotating and loosening.
Further, as shown in fig. 3 and 4, the first fastening nut 801 is provided with a pin hole 9. For fixing the pin 10.
Further, as shown in fig. 3 and 4, the external adjusting mechanism for the axial flow fan blade disc type further comprises a pin shaft 10, the pin shaft 10 is conical, and the pin shaft 10 is arranged in the pin hole 9 of the first fastening nut 801. When the pin shaft is inserted into the pin hole of the first fastening nut, the first fastening nut is further locked, so that the centrifugal force generated when the blade rotates is overcome, and the blade is prevented from flying out.
Preferably, the external adjusting mechanism for the axial flow fan blade disc type further comprises a gasket 11, the gasket 11 comprises a flat gasket and a spring gasket, the fastening nut 8 is provided with the spring gasket, the adjusting bolt 7 is provided with the spring gasket, and the pin shaft 10 is provided with the flat gasket and the spring gasket. The washer relieves vibration and distributes the pressure of the nut after it is tightened.
According to the blade disc type external adjusting mechanism for the axial flow fan, through the matching of the blade stem shaft of the steel blade and the disc type blade stem shaft sleeve, the steel blade can be accurately positioned on the hub surface, the structure of the joint of the blade stem shaft of the steel blade is reduced by the disc type blade stem sleeve, the blade root gap is convenient to adjust, the structure of the joint is compact, the manufacturing of the disc type blade stem shaft sleeve is simple, and the processing period is short. In the utility model, the disc-type pressing plate is matched with the disc-type blade handle shaft sleeve, and the disc-type pressing plate is provided with the adjusting groove and the poking piece, so that the angle of the steel blade can be conveniently adjusted. According to the utility model, the hub surface is provided with two positioning bolts which respectively penetrate through the disc type blade handle shaft sleeve and the disc type pressing plate, and finally the adjusting bolts are screwed up through the threaded holes of the shifting blocks, so that the disc type blade handle sleeve, the disc type pressing plate and the shifting blocks are locked, the rotation of blades is prevented, the failure rate of the axial flow fan is reduced, the service life of the axial flow fan is prolonged, and the danger of personnel attached to the axial flow fan is reduced. In the utility model, when the fixing shaft section of the steel blade vane stem is fastened by using the fastening nut, the first fastening nut is provided with the pin hole and the pin shaft, so that the centrifugal force during rotation of the blade can be overcome, and the blade is prevented from flying out to cause accidents. The utility model has been practically tested on fans of FBCDZ No. 23, FBCDZ No. 24 and FBCDZ No. 26. The actual adjustment is carried out on the same machine number, and the machine adjustment time is shortened to 0.5 hour/station from 1.5 hour/station. The blade root gap is reduced to 1mm from 4mm of the original external blade root gap, and the expected requirement is completely met.
In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer" orientation or positional relationship are merely for convenience of description and to simplify the description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.
The present utility model has been described in terms of the above-described related embodiments, however, the above-described embodiments are merely examples of implementations of the utility model. It should be noted that the disclosed embodiments do not limit the scope of the utility model. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (4)
1. An in vitro adjustment mechanism for axial flow fan blade discs, comprising:
the steel blade is provided with a blade handle shaft which is in a ladder shape, the blade handle shaft comprises a positioning shaft section and a fixed shaft section, the diameter of the positioning shaft section is larger than that of the fixed shaft section, and threads are arranged at the tail part of the fixed shaft section;
the hub surface is a fan hub surface, the hub surface is provided with a shaft hole and a positioning hole, a disc type blade handle sleeve is arranged at the inner side of the shaft hole of the hub surface, one end of the disc type blade handle sleeve penetrates through the shaft hole of the hub surface and is fixed at the inner side surface of the hub surface, the disc type petiole sleeve is provided with a through hole, the petiole positioning shaft section is in contact with one end of the disc type petiole sleeve, the petiole fixing shaft section penetrates through the first through hole of the disc type petiole sleeve, and the disc type petiole sleeve is symmetrically provided with fixing holes along the circle center;
the disc type pressing plate is identical to the disc type petiole sleeve in size and shape, a second through hole is formed in the circle center of the disc type pressing plate, one end of the disc type pressing plate is in contact with the disc type petiole sleeve, the second through hole of the disc type pressing plate is corresponding to the first through hole of the disc type petiole sleeve in position and size, an adjusting groove is symmetrically formed in the disc type pressing plate along the circle center of the second through hole, the center of the adjusting groove of the disc type pressing plate is identical to the circle center of the fixing hole of the disc type petiole sleeve, the adjusting groove is arc-shaped, and a stepped groove is formed in the circle edge of the outer side of the other end of the disc type pressing plate;
the poking piece is arranged on the stepped groove of the disc type pressing plate, the poking piece and the adjusting groove are positioned on the same horizontal line, and the poking piece is arc-shaped;
the device comprises a poking block, wherein one end of the poking block is provided with a spherical surface, one end of the poking block is contacted with an arc-shaped part of the poking sheet, and the poking block is provided with a threaded hole;
the adjusting bolt passes through the positioning hole arranged on the hub surface, the fixing hole of the disc type blade handle sleeve and the adjusting groove of the disc type pressing plate and is screwed by the shifting block threaded hole; and
the fastening nut is arranged at the thread of the fixed shaft section of the steel blade vane stem, the disc type pressing plate is tightly pressed by the fastening nut, and the fastening nut comprises a first fastening nut and a second fastening nut.
2. The external adjusting mechanism for a blade disc of an axial flow fan according to claim 1, wherein the first fastening nut is provided with a pin hole.
3. The disc type external adjusting mechanism for the axial flow fan blade of claim 2, further comprising a pin shaft, wherein the pin shaft is tapered, and wherein the pin shaft is arranged in the pin hole of the first fastening nut.
4. The external adjusting mechanism for a blade disc of an axial flow fan according to claim 3, further comprising a washer, the washer comprising a flat pad and a spring pad, the fastening nut being provided with the spring pad, the adjusting bolt being provided with the spring pad, the pin being provided with the flat pad and the spring pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321270933.3U CN219974904U (en) | 2023-05-24 | 2023-05-24 | Be used for external adjustment mechanism of axial fan blade disc type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321270933.3U CN219974904U (en) | 2023-05-24 | 2023-05-24 | Be used for external adjustment mechanism of axial fan blade disc type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219974904U true CN219974904U (en) | 2023-11-07 |
Family
ID=88595298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321270933.3U Active CN219974904U (en) | 2023-05-24 | 2023-05-24 | Be used for external adjustment mechanism of axial fan blade disc type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219974904U (en) |
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2023
- 2023-05-24 CN CN202321270933.3U patent/CN219974904U/en active Active
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