CN111473001B - Anti-surge durable efficient mining fan - Google Patents
Anti-surge durable efficient mining fan Download PDFInfo
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- CN111473001B CN111473001B CN202010361850.XA CN202010361850A CN111473001B CN 111473001 B CN111473001 B CN 111473001B CN 202010361850 A CN202010361850 A CN 202010361850A CN 111473001 B CN111473001 B CN 111473001B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/002—Axial flow fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0246—Surge control by varying geometry within the pumps, e.g. by adjusting vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
- F04D29/362—Blade mountings adjustable during rotation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/60—Control system actuates means
- F05D2270/65—Pneumatic actuators
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
An anti-surge durable high-efficiency mine fan belongs to the field of mine fan equipment. The device is characterized in that the current collector part, the main machine part, the blade fin part, the first diffuser and the second diffuser are coaxially arranged together in a forward and backward sequence; the upper part of the main machine part is provided with a junction box, and a driving motor is arranged in the main machine part through a motor bracket; the blade wing part comprises a hollow hub outer shell with an inverted T-shaped cross section, and the hub outer shell comprises a large diameter part and a small diameter part; a motor shaft insertion hole is formed in the front end face of the large-diameter part, a motor shaft of the driving motor is inserted and fixed in the motor shaft insertion hole, a plurality of blade fin insertion holes are formed in the periphery of the large-diameter part in an annular mode, and a plurality of blade fins are radially arranged in each blade fin insertion hole; an automatic adjusting device for the angle of the blade fin is arranged in the small diameter part. The invention can prevent the fan from surging in the operation process and can adjust the fan after surging occurs.
Description
Technical Field
The invention belongs to the field of mining fan equipment, and particularly relates to an anti-surge durable efficient mining fan.
Background
Surge is a phenomenon in which when a fan having a "hump" -shaped Q-H performance curve is operated at a curve critical point on the left side, i.e., in an unstable region, the flow rate and the energy head of the fan are periodically and repeatedly changed in an instable manner in a moment. The maximum energy head generated by the fan is smaller than the resistance in the pipeline, the fluid starts to flow backwards in the opposite direction and flows back into the fan from the pipeline (negative flow occurs), because the fan continues to operate, when the pressure in the pipeline is reduced, the fan restarts outputting the flow, and as long as the flow required by the outside is kept smaller than the flow at the critical point, the process is repeated, namely surging occurs.
In surge, the flow, full pressure and power of the fan produce pulsations or substantial pulsations with accompanying significant noise, sometimes even high decibels. The vibration during surge is sometimes severe, damaging the fan and the piping system. Therefore, when surging occurs, the fan can hardly operate normally.
In view of this, the applicant has devised the device to prevent the fan from surging during operation and to enable regulation after surging.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anti-surge durable high-efficiency mine fan, which can prevent the fan from generating surge in the operation process and can adjust the fan after the fan generates the surge.
In order to solve the technical problems, the technical scheme of the invention is as follows: the anti-surge durable high-efficiency mining fan comprises a current collector part, a main machine part, a blade fin part, a first diffuser and a second diffuser, wherein the current collector part, the main machine part, the blade fin part, the first diffuser and the second diffuser are sequentially and coaxially mounted together from front to back; the upper part of the main machine part is provided with a junction box, and a driving motor is arranged in the main machine part through a motor bracket; the blade wing part comprises a hollow hub outer shell with an inverted T-shaped cross section, and the hub outer shell comprises a large diameter part and a small diameter part; a motor shaft insertion hole is formed in the front end face of the large-diameter part, a motor shaft of the driving motor is inserted and fixed in the motor shaft insertion hole, a plurality of blade fin insertion holes are formed in the periphery of the large-diameter part in an annular mode, and a plurality of blade fins are radially arranged in each blade fin insertion hole; an automatic adjusting device for the angle of the blade fin is arranged in the small diameter part.
Preferably, the first diffuser comprises a first diffuser outer cylinder and a first core cylinder, and the first core cylinder is fixedly installed along the central axis of the first diffuser outer cylinder; the second diffuser comprises a second diffuser outer cylinder and a second core cylinder, and the second core cylinder is fixedly installed along the central axis of the second diffuser outer cylinder; the inner cylinder diameter of the front end of the second diffuser outer cylinder is equal to the inner cylinder diameter of the rear end of the first diffuser outer cylinder, and the two are mutually connected and mounted to form a horn-shaped inner cylinder structure with a small front part and a large rear part; the outer cylinder diameter of the front end of the second mandrel is equal to the inner cylinder diameter of the rear end of the first mandrel, and the outer cylinder diameter and the inner cylinder diameter are mutually connected and installed to form a frustum-shaped structure with a large front part and a small rear part; the small diameter portion of the hub outer case is inserted into the first cartridge of the first diffuser.
Preferably, a circular boss is arranged on the inner wall of the front end of the large-diameter part of the outer shell of the hub along the central axis, top-mounted spring mounting holes corresponding to the number and the positions of the blades are arranged on the periphery of the circular boss in an annular array mode, fixed ends of top-mounted springs are respectively inserted into the top-mounted spring mounting holes, and the extending ends of the top-mounted springs abut against the end faces of the blade shafts of the blades;
the fin shaft of the blade fin is coaxially provided with a self-locking circular table and an angle adjusting bevel gear from outside to inside in sequence; the small diameter ends of the self-locking circular truncated cone and the angle adjusting bevel gear face the blade direction of the blade fin; the outer peripheral surface of the self-locking circular truncated cone is provided with a frosting surface or a friction raised line along an outer bus; the shaft section of the blade-fin insertion hole is in a round table shape, and a frosting surface is arranged on the inner hole wall of the blade-fin insertion hole or a strip-shaped friction groove is arranged along an inner bus; when the fan is in a rotating state, the self-locking round table of the fin shaft and the blade fin insertion hole are tightly attached through the frosting surface or the frosting raised line and the frosting groove under the elastic action of the top-mounted spring, so that self-locking is realized.
Preferably, the automatic blade-fin angle adjusting device comprises a speed-adjusting gear disc, a speed-adjusting gear disc lifting control device, a gear disc guide post, a speed reduction transmission set and a speed-adjusting switch device;
the speed regulation gear disc is arranged in the large-diameter part of the hub outer shell, the front end of the speed regulation gear disc is provided with an inwards concave annular inner tooth surface, the middle part of the speed regulation gear disc is provided with a fluted disc through hole, and the speed regulation gear disc is sleeved at the front part of the gear disc guide post through the fluted disc through hole; a non-circular slot is formed in the lower portion of the speed regulation gear disc around the gear disc through hole, a non-circular insert block matched with the non-circular slot in shape and size is arranged at the front end of the gear disc guide post penetrating through the speed regulation gear disc, and when the speed regulation gear disc slides to the foremost end along the gear disc guide post, the non-circular insert block can be inserted into the non-circular slot; the front end of the gear disc guide post is arranged in the large-diameter part of the hub outer shell, and the rear end of the gear disc guide post is arranged in the small-diameter part of the hub outer shell; the inner wall of the front end of the small-diameter part is provided with an installation baffle ring, the inner wall of the small-diameter part at the rear end of the installation baffle ring is provided with a transmission bearing, and a gear disc guide post is inserted and fixed in the transmission bearing; a compression spring is sleeved on the gear disc guide post, the rear end of the compression spring is connected with an inner magnetic ring, the inner magnetic ring is arranged at the front end of the mounting baffle ring, and the front end of the compression spring is connected with the rear end face of the speed regulating gear disc; the lifting control device of the speed regulating fluted disc comprises an outer magnetic ring, a lifting driving support and a lifting magnetic ring driving cylinder, wherein the outer magnetic ring is sleeved on the outer wall of the small-diameter part of the outer hub shell, the outer magnetic ring is connected with the lifting magnetic ring driving cylinder through the lifting driving support, the lifting magnetic ring driving cylinder is fixed in a first core barrel, the lifting magnetic ring driving cylinder can drive the outer magnetic ring to slide up and down along the outer peripheral wall of the small-diameter part through the lifting driving support, meanwhile, the outer magnetic ring can drive the inner magnetic ring to move up and down along the guide post of the gear disc so as to drive the speed regulating gear disc to move to the front end of the guide post of the gear disc, the annular inner tooth surface of the speed regulating gear disc moves downwards and is contacted with angle regulating bevel gears on each blade fin shaft at the same time, each blade fin shaft is driven to contract inwards along the central axis in the downwards moving process, when the speed regulating gear disc moves downwards to the lower limit, and releasing the self-locking fixing mode of the leaf fin.
Preferably, the speed regulation switch device comprises a lifting sliding plug and a lifting sliding plug driving cylinder, a sliding plug insertion hole is formed in the rear end face of the small-diameter part along the central axis, and the middle part of the lifting sliding plug is arranged in the sliding plug insertion hole; the lifting sliding plug comprises a front barrel shaft, a rear barrel shaft and a transmission plug head, the rear end of the rear barrel shaft is connected with a lifting sliding plug driving cylinder, and the lifting sliding plug driving cylinder is fixed in the first core barrel; the front end of the rear barrel shaft is provided with a barrel shaft inserting hole, and the rear end of the front barrel shaft is arranged in the barrel shaft inserting hole through a barrel shaft mounting bearing; a cylinder shaft transmission bevel gear is coaxially fixed on the front cylinder shaft; a barrel shaft transmission conical inner tooth groove is formed in the rear end face of the small-diameter portion, and the barrel shaft transmission conical inner tooth groove and the sliding plug insertion hole are coaxially arranged; the front end of the transmission plug head is provided with a non-circular transmission groove;
the speed reduction transmission set is arranged in the small-diameter part of the hub outer shell and comprises a support frame body, the rear end of the support frame body is symmetrically provided with a first support arm and a second support arm along the central axis, the first support arm and the second support arm respectively comprise a vertical rod and a horizontal rod, the inner side of the horizontal rod is vertically connected with the rear end of the vertical rod, and the front end of the vertical rod is fixedly connected to the support frame body; more than one spherical roller is arranged on the rear side surface of the cross rod, and a support frame stop inner magnetic block is embedded in the cross rod; the vertical rod is a rod body which can elastically stretch out and draw back along a straight line; an annular slide rail cavity with a pi-shaped cross section is formed in the rear end face of the small-diameter part, and cross rods of the first support arm and the second support arm are symmetrically arranged in the annular slide rail cavity; the annular slide rail cavity and the slide plug insertion hole are coaxially arranged;
the rear end of the lifting driving support is respectively provided with a first stop outer magnetic block and a second stop outer magnetic block through a first stop magnetic block connecting rod and a second stop magnetic block connecting rod, and when the first stop outer magnetic block and the second stop outer magnetic block move forwards along with the lifting driving support, the first stop outer magnetic block and the second stop outer magnetic block can attract the supporting frame stop inner magnetic blocks in the first supporting arm and the second supporting arm to enable the supporting frame body to keep a static state;
a sliding plug guide insertion hole with an opening at the rear end is formed in the rear end of the support frame body between the first support arm and the second support arm, a driving gear shaft through hole is formed in the bottom of the sliding plug guide insertion hole, a driving gear shaft penetrates through the driving gear shaft through hole, a non-circular transmission insertion block is fixed at one end, penetrating through the sliding plug guide insertion hole, of the driving gear shaft in the axial direction, and a first driving gear is fixed at one end, penetrating through the sliding plug guide insertion hole, of the driving gear shaft in the axial direction;
when the lifting sliding plug drives the telescopic shaft of the air cylinder to push the lifting sliding plug to move forwards until the transmission plug head is inserted into the sliding plug guide jack, the barrel shaft transmission bevel gear is inserted into a barrel shaft transmission conical inner tooth groove on the rear end face of the small-diameter part, the non-circular transmission insertion block at the rear end of the driving gear shaft is inserted into the non-circular transmission groove at the front end of the transmission plug head, the small-diameter part drives the front barrel shaft to synchronously rotate, the transmission plug head and the driving gear shaft are further driven to synchronously rotate, and meanwhile, the support frame body is kept in a static state.
Preferably, the first driving gear is meshed with and drives an Nth driving gear through at least three stages of intermediate speed reduction driving gear sets; the first driving gear, the intermediate speed reduction transmission gear set and the Nth driving gear are all arranged on the support frame body; the upper end face of the gear disc guide column is provided with a guide column driving inner tooth groove, and the Nth driving gear is arranged in the guide column driving inner tooth groove and is in meshed transmission with the guide column driving inner tooth groove, so that the gear disc guide column is driven to rotate around the central axis of the gear disc at a low speed.
Preferably, the intermediate speed reduction transmission gear set comprises an upper connecting rod, an upper gear shaft, a lower connecting rod and a lower gear shaft, the upper end of the upper connecting rod is mounted at the upper part of the support frame body, the lower end of the upper connecting rod is inserted with the upper gear shaft, the upper gear shaft is horizontally arranged and can rotate along the central axis of the upper gear shaft, and a front gear and an upper rear gear are respectively mounted at the front end and the rear end of the upper gear shaft; the lower end of the lower connecting rod is arranged at the lower part of the support frame body, a lower gear shaft is inserted at the upper end of the lower connecting rod, the lower gear shaft is horizontally arranged and can rotate along the central axis of the lower gear shaft, and a lower front gear and a lower rear gear are respectively arranged at the front end and the rear end of the lower gear shaft; the upper rear gear of the intermediate speed reduction transmission gear set is meshed with the first driving gear or the lower front gear of the previous intermediate speed reduction transmission gear set, and the upper front gear of the intermediate speed reduction transmission gear set is meshed with the lower rear gear of the same set; the transmission ratio of each stage of intermediate speed reduction transmission gear set is i = 60-120: 1.
preferably, an air volume adjusting device is arranged on the rear end face of the second diffuser outer cylinder, and comprises a front air net and a rear air net;
the front wind net comprises a front outer ring net frame and a front inner ring net frame, the front outer ring net frame and the front inner ring net frame are coaxially and coplanarly arranged, and the front outer ring net frame and the front inner ring net frame are connected and fixed into a whole through four net frame connecting rods; a net-shaped inner wind filtering net is arranged in the front inner ring net rack, and a plurality of straight strip-shaped front wind baffles are radially and annularly arrayed between the front outer ring net rack and the front inner ring net rack;
the rear wind net comprises a rear outer ring net frame and a rear inner ring net frame, the rear outer ring net frame and the rear inner ring net frame are coaxially and coplanarly arranged, and the rear outer ring net frame and the rear inner ring net frame are connected and fixed into a whole through four net frame connecting rods; a plurality of straight strip-shaped rear wind shields are radially and annularly arrayed between the rear outer ring net rack and the rear inner ring net rack;
each front wind shield plate and each rear wind shield plate correspond to each other in a front-to-back one-to-one manner, and the corresponding single front wind shield plate and the corresponding single rear wind shield plate are connected through a flexible wind shield film;
the opposite surfaces of the front outer ring net rack and the rear outer ring net rack are inserted and combined into a whole through an annular guide rail slot and an annular guide rail inserting block; the periphery of the front outer ring net rack is annularly arrayed with at least three fixing pieces, and the fixing pieces are provided with outer threaded holes; an inner threaded hole is formed in the outer peripheral wall of the rear end of the second diffuser outer cylinder, and screws are mounted in the inner threaded hole and the outer threaded hole; set up the manual handle of dialling in the periphery of back outer loop rack, rotatory manual handle of dialling can rotate back air screen, makes preceding deep bead and back deep bead stagger relatively, adjusts the intake then.
Compared with the prior art, the invention has the beneficial effects that:
the anti-surge durable high-efficiency mining fan solves the surge principle by adopting a blade angle adjusting mode for the axial flow fan, reduces the installation angle of the axial flow fan when the flow required by the system is reduced, moves the performance curve downwards, moves the critical point to the left and downwards, correspondingly reduces the output flow, and further avoids the occurrence of surge.
In addition, this patent is provided with air regulation device, can directly regulate and control the air output of fan, realizes then effective regulation and control of delivery flow, further avoids the emergence of surge.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a wing of a leaf;
FIG. 3 is a schematic structural view of the automatic adjusting device for the angle of the blade fin (non-angle adjusting state);
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is an enlarged view of portion B of FIG. 3;
FIG. 6 is an enlarged view of section C of FIG. 3;
FIG. 7 is a schematic structural view of the automatic adjusting device for the angle of the wing (angle adjusting state);
FIG. 8 is an enlarged view of section D of FIG. 7;
FIG. 9 is a schematic structural view of a speed-adjusting gear plate;
FIG. 10 is a schematic view of the structure of the front wind net;
FIG. 11 is a schematic structural view of a rear wind net;
FIG. 12 is a schematic view of the connection of a single front wind deflector, rear wind deflector and flexible wind-shielding film therebetween (front wind deflector, rear wind deflector in a superposed state);
FIG. 13 is a schematic view of the connection of a single front wind deflector, rear wind deflector and flexible wind-shielding film therebetween (front wind deflector, rear wind deflector staggered);
in the figure: 1. a current collector portion;
2. a host portion; 2.1, driving a motor; 2.2, a motor bracket;
3. a leaf wing portion; 3.1, inserting a hole in a motor shaft; 3.2, leaf fin; 3.3, a wing shaft; 3.4, a large diameter part; 3.5, mounting a spring mounting hole in a jacking mode; 3.6, mounting a spring on the top; 3.7, a shaft body supporting plate; 3.8, an angle adjusting bevel gear; 3.9, self-locking round tables; 3.10, inserting the leaf fin into the hole; 3.11, a speed regulation gear disc; 3.12, an external magnetic ring; 3.13, a small diameter part; 3.14, lifting the driving bracket; 3.15, supporting the frame body; 3.16, driving the inner tooth groove by the guide pillar; 3.17, a transmission bearing; 3.18, a gear disc guide post; 3.19, an inner magnetic ring;
3.20, a rear cylinder shaft; 3.21, a front barrel shaft; 3.22, a cylinder shaft transmission bevel gear; 3.23, a cone-shaped inner tooth groove is driven by the cylinder shaft; 3.24, cross bars; 3.25, an annular slide rail cavity; 3.26, a spherical roller; 3.27, a first support arm; 3.28, a transmission plug head; 3.29, stopping the inner magnetic block by the support frame; 3.30, a first stop outer magnet; 3.31, a first stop magnetic block connecting rod; 3.32, mounting a bearing on a cylinder shaft; 3.33, sliding plug guiding jack; 3.34, a driving gear shaft; 3.35, non-circular transmission insert blocks; 3.36, non-circular transmission grooves; 3.37, a second support arm; 3.38, a sliding plug through hole; 3.39, a first driving gear; 3.40, an upper rear gear; 3.41, an upper gear shaft; 3.42, an upper connecting rod; 3.43, an upper front gear; 3.44, lower front gear; 3.45, a lower gear shaft; 3.46, lower rear gear; 3.47, a lower connecting rod; 3.48, an Nth driving gear; 3.49, installing a baffle ring; 3.50, pressing a spring; 3.51, non-circular slot; 3.52, non-circular insertion blocks; 3.53, annular inner tooth surface; 3.54, perforating the fluted disc; 3.55, a second stop magnetic block connecting rod; 3.56, a second stop outer magnetic block;
4. a first diffuser; 4.1, a first core barrel; 4.2, a first diffuser outer cylinder;
5. a second diffuser; 5.1, a second core barrel; 5.2, a second diffuser outer cylinder;
6. an air volume adjusting device; 6.1, manually shifting a handle; 6.2, a rear air net; 6.3, a front wind net; 6.4, screws; 6.5, fixing sheets; 6.6, a front outer ring net rack; 6.7, a front wind shield; 6.8, a net rack connecting rod; 6.9, a front inner ring net rack; 6.10, a mesh-shaped inner air filtering net; 6.11, a rear wind shield; 6.12, a rear outer ring net rack; 6.13, a net rack connecting rod; 6.14, a rear inner ring net rack; 6.15, flexible wind shielding film.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example one
As shown in fig. 1, the anti-surge durable high-efficiency mining fan comprises a current collector part, a main machine part, a blade fin part, a first diffuser and a second diffuser, wherein the current collector part, the main machine part, the blade fin part, the first diffuser and the second diffuser are coaxially installed together in a forward and backward sequence; the upper part of the main machine part is provided with a junction box, and a driving motor is arranged in the main machine part through a motor bracket; the blade wing part comprises a hollow hub outer shell with an inverted T-shaped cross section, and the hub outer shell comprises a large diameter part and a small diameter part; and a motor shaft insertion hole is formed in the front end face of the large-diameter part, and a motor shaft of the driving motor is inserted and fixed in the motor shaft insertion hole. As shown in fig. 2, a plurality of blade fin insertion holes are annularly formed in the outer periphery of the large-diameter portion, and a plurality of blade fins are radially arranged in each blade fin insertion hole; an automatic adjusting device for the angle of the blade fin is arranged in the small diameter part.
The first diffuser comprises a first diffuser outer cylinder and a first core cylinder, and the first core cylinder is fixedly installed along the central axis of the first diffuser outer cylinder; the second diffuser comprises a second diffuser outer cylinder and a second core cylinder, and the second core cylinder is fixedly installed along the central axis of the second diffuser outer cylinder; the inner cylinder diameter of the front end of the second diffuser outer cylinder is equal to the inner cylinder diameter of the rear end of the first diffuser outer cylinder, and the two are mutually connected and mounted to form a horn-shaped inner cylinder structure with a small front part and a large rear part; the outer cylinder diameter of the front end of the second mandrel is equal to the inner cylinder diameter of the rear end of the first mandrel, and the outer cylinder diameter of the front end of the second mandrel and the inner cylinder diameter of the rear end of the first mandrel are connected and installed to form a frustum-shaped structure with a large front part and a small rear part. The small diameter portion of the hub outer case is inserted into the first cartridge of the first diffuser.
As shown in fig. 3 and 4, a circular boss is arranged on the inner wall of the front end of the large-diameter part of the hub outer shell along the central axis, top-mounted spring mounting holes corresponding to the number and positions of the blades are arranged on the periphery of the circular boss in an annular array, fixed ends of top-mounted springs are respectively inserted into the top-mounted spring mounting holes, and the extending ends of the top-mounted springs abut against the end faces of the blade shafts of the blades.
The fin shaft of the blade fin is coaxially provided with a self-locking circular table and an angle adjusting bevel gear from outside to inside in sequence; the small diameter ends of the self-locking circular truncated cone and the angle adjusting bevel gear face the blade direction of the blade fin; the outer peripheral surface of the self-locking circular truncated cone is provided with a frosting surface or a friction raised line along an outer bus; the shaft section of the blade-fin insertion hole is in a round table shape, and a frosting surface is arranged on the inner hole wall of the blade-fin insertion hole or a strip-shaped friction groove is arranged along an inner bus; when the fan is in a rotating state, the self-locking round table of the fin shaft and the blade fin insertion hole are tightly attached through the frosting surface or the frosting raised line and the frosting groove under the elastic action of the top-mounted spring, so that self-locking is realized.
The automatic blade-fin angle regulating device comprises a speed regulating gear disc, a speed regulating fluted disc lifting control device, a gear disc guide post, a speed reducing transmission set and a speed regulating switch device.
As shown in fig. 3 and 6, the speed-adjusting gear plate is arranged in the large-diameter portion of the outer casing of the hub, the front end of the speed-adjusting gear plate is provided with an inner concave annular tooth surface, the middle of the speed-adjusting gear plate is provided with a fluted disc through hole, and the speed-adjusting gear plate is sleeved on the front portion of the gear plate guide post through the fluted disc through hole; a non-circular slot is formed in the lower portion of the speed regulation gear disc around the gear disc through hole, a non-circular insert block matched with the non-circular slot in shape and size is arranged at the front end of the gear disc guide post penetrating through the speed regulation gear disc, and when the speed regulation gear disc slides to the foremost end along the gear disc guide post, the non-circular insert block can be inserted into the non-circular slot; the front end of the gear disc guide post is arranged in the large-diameter part of the hub outer shell, and the rear end of the gear disc guide post is arranged in the small-diameter part of the hub outer shell; the inner wall of the front end of the small-diameter part is provided with an installation baffle ring, the inner wall of the small-diameter part at the rear end of the installation baffle ring is provided with a transmission bearing, and a gear disc guide post is inserted and fixed in the transmission bearing; a compression spring is sleeved on the gear disc guide post, the rear end of the compression spring is connected with an inner magnetic ring, the inner magnetic ring is arranged at the front end of the mounting baffle ring, and the front end of the compression spring is connected with the rear end face of the speed regulating gear disc; the lifting control device of the speed regulating fluted disc comprises an outer magnetic ring, a lifting driving support and a lifting magnetic ring driving cylinder, wherein the outer magnetic ring is sleeved on the outer wall of the small-diameter part of the outer hub shell, the outer magnetic ring is connected with the lifting magnetic ring driving cylinder through the lifting driving support, the lifting magnetic ring driving cylinder is fixed in a first core barrel, the lifting magnetic ring driving cylinder can drive the outer magnetic ring to slide up and down along the outer peripheral wall of the small-diameter part through the lifting driving support, meanwhile, the outer magnetic ring can drive the inner magnetic ring to move up and down along the guide post of the gear disc so as to drive the speed regulating gear disc to move to the front end of the guide post of the gear disc, the annular inner tooth surface of the speed regulating gear disc moves downwards and is contacted with angle regulating bevel gears on each blade fin shaft at the same time, each blade fin shaft is driven to contract inwards along the central axis in the downwards moving process, when the speed regulating gear disc moves downwards to the lower limit, and releasing the self-locking fixing mode of the leaf fin.
As shown in fig. 3 and 4, the speed-regulating switch device includes a lifting sliding plug and a lifting sliding plug driving cylinder, a sliding plug insertion hole is formed in the rear end surface of the small-diameter portion along the central axis, and the middle portion of the lifting sliding plug is arranged in the sliding plug insertion hole; the lifting sliding plug comprises a front barrel shaft, a rear barrel shaft and a transmission plug head, the rear end of the rear barrel shaft is connected with a lifting sliding plug driving cylinder, and the lifting sliding plug driving cylinder is fixed in the first core barrel; the front end of the rear barrel shaft is provided with a barrel shaft inserting hole, and the rear end of the front barrel shaft is arranged in the barrel shaft inserting hole through a barrel shaft mounting bearing; a cylinder shaft transmission bevel gear is coaxially fixed on the front cylinder shaft; a barrel shaft transmission conical inner tooth groove is formed in the rear end face of the small-diameter portion, and the barrel shaft transmission conical inner tooth groove and the sliding plug insertion hole are coaxially arranged; the front end of the transmission plug head is provided with a non-circular transmission groove.
The speed reduction transmission set is arranged in the small-diameter part of the hub outer shell and comprises a support frame body, the rear end of the support frame body is symmetrically provided with a first support arm and a second support arm along the central axis, the first support arm and the second support arm respectively comprise a vertical rod and a horizontal rod, the inner side of the horizontal rod is vertically connected with the rear end of the vertical rod, and the front end of the vertical rod is fixedly connected to the support frame body; more than one spherical roller is arranged on the rear side surface of the cross rod, and a support frame stop inner magnetic block is embedded in the cross rod; the vertical rod is a rod body which can elastically stretch out and draw back along a straight line; an annular slide rail cavity with a pi-shaped cross section is formed in the rear end face of the small-diameter part, and cross rods of the first support arm and the second support arm are symmetrically arranged in the annular slide rail cavity; the annular slide rail cavity and the slide plug insertion hole are coaxially arranged.
The rear end of the lifting driving support is respectively provided with a first stop outer magnetic block and a second stop outer magnetic block through a first stop magnetic block connecting rod and a second stop magnetic block connecting rod, and when the first stop outer magnetic block and the second stop outer magnetic block move forwards along with the lifting driving support, the first stop outer magnetic block and the second stop outer magnetic block can attract the supporting frame stop inner magnetic blocks in the first supporting arm and the second supporting arm to enable the supporting frame body to keep a static state; the first locking outer magnetic block and the second locking outer magnetic block are both electromagnets, and the magnetic attraction of the first locking outer magnetic block and the second locking outer magnetic block can be controlled by adjusting the electromagnet power supply circuit, so that the situation of insufficient attraction is avoided. However, the first locking outer magnetic block and the second locking outer magnetic block are not contacted with the rear end face of the small diameter portion all the time in the moving process, and the manufacturing material of the rear end face of the small diameter portion is a non-magnetic material so as to avoid resistance brought to rotation of the hub.
The rear end of the support frame body between the first support arm and the second support arm is provided with a sliding plug guide insertion hole with an open rear end, the bottom of the sliding plug guide insertion hole is provided with a driving gear shaft through hole, a driving gear shaft penetrates through the driving gear shaft through hole, the driving gear shaft penetrates into one end of the sliding plug guide insertion hole in the axial direction to form a fixed non-circular transmission insertion block, and the driving gear shaft penetrates out of one end of the sliding plug guide insertion hole in the axial direction to form a fixed first driving gear.
When the lifting sliding plug drives the telescopic shaft of the air cylinder to push the lifting sliding plug to move forwards until the transmission plug head is inserted into the sliding plug guide jack, the barrel shaft transmission bevel gear is inserted into a barrel shaft transmission conical inner tooth groove on the rear end face of the small-diameter part, the non-circular transmission insertion block at the rear end of the driving gear shaft is inserted into the non-circular transmission groove at the front end of the transmission plug head, the small-diameter part drives the front barrel shaft to synchronously rotate, the transmission plug head and the driving gear shaft are further driven to synchronously rotate, and meanwhile, the support frame body is kept in a static state.
As shown in fig. 3 and 5, the first driving gear is meshed with and drives the nth driving gear through at least three stages of intermediate speed reduction transmission gear sets; the first driving gear, the intermediate speed reduction transmission gear set and the Nth driving gear are all arranged on the support frame body; the upper end face of the gear disc guide column is provided with a guide column driving inner tooth groove, and the Nth driving gear is arranged in the guide column driving inner tooth groove and is in meshed transmission with the guide column driving inner tooth groove, so that the gear disc guide column is driven to rotate around the central axis of the gear disc at a low speed.
The middle speed reduction transmission gear set comprises an upper connecting rod, an upper gear shaft, a lower connecting rod and a lower gear shaft, the upper end of the upper connecting rod is mounted at the upper part of the support frame body, the lower end of the upper connecting rod is inserted with the upper gear shaft, the upper gear shaft is horizontally arranged and can rotate along the central axis of the upper gear shaft, and a front gear and an upper rear gear are respectively mounted at the front end and the rear end of the upper gear shaft; the lower end of the lower connecting rod is arranged at the lower part of the support frame body, a lower gear shaft is inserted at the upper end of the lower connecting rod, the lower gear shaft is horizontally arranged and can rotate along the central axis of the lower gear shaft, and a lower front gear and a lower rear gear are respectively arranged at the front end and the rear end of the lower gear shaft; the upper rear gear of the intermediate speed reduction transmission gear set is meshed with the first driving gear or the lower front gear of the previous intermediate speed reduction transmission gear set, and the upper front gear of the intermediate speed reduction transmission gear set is meshed with the lower rear gear of the same set; the transmission ratio of each stage of intermediate speed reduction transmission gear set is i = 60-120: 1.
the principle of the device for solving the surge is that a mode of adjusting the angle of the blade is adopted for the axial flow fan, when the flow required by the system is reduced, the installation angle is reduced, the performance curve moves downwards, the critical point moves towards the left lower side, the output flow is correspondingly reduced, and then the surge is avoided.
When the device is used, if surging or abnormal sound movement occurs, the automatic blade fin angle adjusting device can be started to achieve the purpose of adjusting the angle of the blade fin, and then the ratio of air inlet to air outlet is adjusted. The specific adjusting method comprises the following steps: the method comprises the steps that firstly, a lifting magnetic ring driving cylinder is started, a telescopic rod of the lifting magnetic ring driving cylinder can drive an outer magnetic ring to slide up and down along the outer peripheral wall of a small-diameter part through a lifting driving support, meanwhile, the outer magnetic ring can drive an inner magnetic ring to move up and down along a gear disc guide post, then, a speed regulating gear disc is driven to move to the front end of the gear disc guide post, an annular inner tooth surface of the speed regulating gear disc moves downwards and is simultaneously contacted with angle regulating bevel gears on all blade fin shafts, all the blade fin shafts are driven to contract inwards along a central axis in the downward moving process, when the speed regulating gear disc moves downwards to a lower limiting position, the blade fin shafts contract inwards until self-locking round tables of the blade fin shafts are separated from contact with inner hole walls of blade. When the lifting magnetic ring is started to drive the cylinder, the first stop outer magnetic block and the second stop outer magnetic block move forwards along with the lifting driving support, the support frame in the first support arm and the second support arm can be attracted to stop the inner magnetic block, and the support frame body is kept in a static state.
Then, the lifting sliding plug driving cylinder is started, when the telescopic shaft of the lifting sliding plug driving cylinder pushes the lifting sliding plug to move forwards until the transmission plug head is inserted into the sliding plug guide jack, the barrel shaft transmission bevel gear is inserted into the barrel shaft transmission conical inner tooth groove on the rear end face of the small-diameter part, the non-circular transmission insertion block at the rear end of the driving gear shaft is inserted into the non-circular transmission groove at the front end of the transmission plug head, and the small-diameter part drives the front barrel shaft to synchronously rotate so as to drive the transmission plug head and the driving gear shaft to synchronously rotate. The first driving gear is meshed with and drives an Nth driving gear through at least three stages of intermediate speed reduction transmission gear sets, after multi-stage speed reduction, a driving gear disc guide column and a speed regulation gear disc synchronously rotate at a low speed, and then the annular inner tooth surface is meshed with angle regulation bevel gears on all the wing shafts, so that all the wing shafts rotate around the central axis of the wing shafts, and the mounting angles of the wing shafts are regulated until the surging phenomenon disappears. And then the lifting sliding plug driving cylinder and the lifting magnetic ring driving cylinder are reset. The lifting sliding plug driving cylinder and the lifting magnetic ring driving cylinder can control the stopping process through a wireless-connected remote controller.
In order to facilitate the rotation of each blade-fin shaft, an arc shaft body supporting plate made of a self-lubricating material can be padded below each blade-fin shaft, or a plurality of universal spherical rollers are pre-embedded on an inner arc surface of the arc shaft body supporting plate, which is in contact with the blade-fin shaft, so as to facilitate the steering of the shaft body.
Example two
In the embodiment, an air volume adjusting device is arranged on the rear end surface of the second diffuser outer cylinder, and the air volume adjusting device comprises a front air net and a rear air net.
As shown in fig. 10, the front wind net comprises a front outer ring net frame and a front inner ring net frame, the front outer ring net frame and the front inner ring net frame are coaxially and coplanarly arranged, and the front outer ring net frame and the front inner ring net frame are connected and fixed into a whole through four net frame connecting rods; a reticular inner air filtering net is arranged in the front inner ring net frame, and a plurality of straight strip-shaped front wind shields are radially and annularly arrayed between the front outer ring net frame and the front inner ring net frame.
As shown in fig. 11, the rear wind net comprises a rear outer ring net rack and a rear inner ring net rack, the rear outer ring net rack and the rear inner ring net rack are coaxially and coplanarly arranged, and the rear outer ring net rack and the rear inner ring net rack are connected and fixed into a whole through four net rack connecting rods; a plurality of straight strip-shaped rear wind shields are radially and annularly arrayed between the rear outer ring net rack and the rear inner ring net rack.
As shown in fig. 12, each front windshield plate and each rear windshield plate correspond to each other one by one, and the corresponding single front windshield plate and the corresponding single rear windshield plate are connected by a flexible wind shielding film.
As shown in fig. 1, the front outer ring net rack and the rear outer ring net rack are inserted and combined into a whole through annular guide rail slots and annular guide rail insertion blocks in opposite directions; the periphery of the front outer ring net rack is annularly arrayed with at least three fixing pieces, and the fixing pieces are provided with outer threaded holes; an inner threaded hole is formed in the outer peripheral wall of the rear end of the second diffuser outer cylinder, and screws are mounted in the inner threaded hole and the outer threaded hole; set up the manual handle of dialling in the periphery of back outer loop rack, rotatory manual handle of dialling can rotate back air screen, makes preceding deep bead and back deep bead stagger relatively, adjusts the intake then.
The rest of the structure and the using mode of the embodiment are the same as those of the first embodiment.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention, without departing from the technical solution of the present invention, still belong to the protection scope of the technical solution of the present invention.
Claims (4)
1. The utility model provides a high-efficient mining fan of anti-surge durable type which characterized in that: the device comprises a current collector part, a main machine part, a blade fin part, a first diffuser and a second diffuser, wherein the current collector part, the main machine part, the blade fin part, the first diffuser and the second diffuser are sequentially and coaxially arranged together from front to back; the upper part of the main machine part is provided with a junction box, and a driving motor is arranged in the main machine part through a motor bracket; the blade wing part comprises a hollow hub outer shell with an inverted T-shaped cross section, and the hub outer shell comprises a large diameter part and a small diameter part; a motor shaft insertion hole is formed in the front end face of the large-diameter part, a motor shaft of the driving motor is inserted and fixed in the motor shaft insertion hole, a plurality of blade fin insertion holes are formed in the periphery of the large-diameter part in an annular mode, and a plurality of blade fins are radially arranged in each blade fin insertion hole; a leaf fin angle automatic adjusting device is arranged in the small diameter part;
the first diffuser comprises a first diffuser outer cylinder and a first core cylinder, and the first core cylinder is fixedly installed along the central axis of the first diffuser outer cylinder; the second diffuser comprises a second diffuser outer cylinder and a second core cylinder, and the second core cylinder is fixedly installed along the central axis of the second diffuser outer cylinder; the inner cylinder diameter of the front end of the second diffuser outer cylinder is equal to the inner cylinder diameter of the rear end of the first diffuser outer cylinder, and the two are mutually connected and mounted to form a horn-shaped inner cylinder structure with a small front part and a large rear part; the outer cylinder diameter of the front end of the second mandrel is equal to the inner cylinder diameter of the rear end of the first mandrel, and the outer cylinder diameter and the inner cylinder diameter are mutually connected and installed to form a frustum-shaped structure with a large front part and a small rear part; the small diameter part of the hub outer shell is inserted into the first core barrel of the first diffuser;
a circular boss is arranged on the inner wall of the front end of the large-diameter part of the hub outer shell along the central axis, top-mounted spring mounting holes corresponding to the number and the positions of the blade wings are arranged on the periphery of the circular boss in an annular array mode, fixed ends of top-mounted springs are respectively inserted into the top-mounted spring mounting holes, and the extending ends of the top-mounted springs abut against the end faces of the blade wings;
the fin shaft of the blade fin is coaxially provided with a self-locking circular table and an angle adjusting bevel gear from outside to inside in sequence; the small diameter ends of the self-locking circular truncated cone and the angle adjusting bevel gear face the blade direction of the blade fin; the outer peripheral surface of the self-locking circular truncated cone is provided with a frosting surface or a friction raised line along an outer bus; the shaft section of the blade-fin insertion hole is in a round table shape, and a frosting surface is arranged on the inner hole wall of the blade-fin insertion hole or a strip-shaped friction groove is arranged along an inner bus; when the fan is in a rotating state, the self-locking round table of the fin shaft and the blade fin insertion hole are tightly attached through a frosting surface or the frosting raised lines and the frosting grooves under the elastic action of the top-mounted spring, so that self-locking is realized;
the automatic blade-fin angle adjusting device comprises a speed-adjusting gear disc, a speed-adjusting gear disc lifting control device, a gear disc guide post, a speed reduction transmission set and a speed-adjusting switch device;
the speed regulation gear disc is arranged in the large-diameter part of the hub outer shell, the front end of the speed regulation gear disc is provided with an inwards concave annular inner tooth surface, the middle part of the speed regulation gear disc is provided with a fluted disc through hole, and the speed regulation gear disc is sleeved at the front part of the gear disc guide post through the fluted disc through hole; a non-circular slot is formed in the lower portion of the speed regulation gear disc around the gear disc through hole, a non-circular insert block matched with the non-circular slot in shape and size is arranged at the front end of the gear disc guide post penetrating through the speed regulation gear disc, and when the speed regulation gear disc slides to the foremost end along the gear disc guide post, the non-circular insert block can be inserted into the non-circular slot; the front end of the gear disc guide post is arranged in the large-diameter part of the hub outer shell, and the rear end of the gear disc guide post is arranged in the small-diameter part of the hub outer shell; the inner wall of the front end of the small-diameter part is provided with an installation baffle ring, the inner wall of the small-diameter part at the rear end of the installation baffle ring is provided with a transmission bearing, and a gear disc guide post is inserted and fixed in the transmission bearing; a compression spring is sleeved on the gear disc guide post, the rear end of the compression spring is connected with an inner magnetic ring, the inner magnetic ring is arranged at the front end of the mounting baffle ring, and the front end of the compression spring is connected with the rear end face of the speed regulating gear disc; the lifting control device of the speed regulating fluted disc comprises an outer magnetic ring, a lifting driving support and a lifting magnetic ring driving cylinder, wherein the outer magnetic ring is sleeved on the outer wall of the small-diameter part of the outer hub shell, the outer magnetic ring is connected with the lifting magnetic ring driving cylinder through the lifting driving support, the lifting magnetic ring driving cylinder is fixed in a first core barrel, the lifting magnetic ring driving cylinder can drive the outer magnetic ring to slide up and down along the outer peripheral wall of the small-diameter part through the lifting driving support, meanwhile, the outer magnetic ring can drive the inner magnetic ring to move up and down along the guide post of the gear disc so as to drive the speed regulating gear disc to move to the front end of the guide post of the gear disc, the annular inner tooth surface of the speed regulating gear disc moves downwards and is contacted with angle regulating bevel gears on each blade fin shaft at the same time, each blade fin shaft is driven to contract inwards along the central axis in the downwards moving process, when the speed regulating gear disc moves downwards to the lower limit, and releasing the self-locking fixing mode of the leaf fin.
2. The anti-surge durable high-efficiency mining fan according to claim 1, characterized in that: the speed regulation switch device comprises a lifting sliding plug and a lifting sliding plug driving cylinder, wherein a sliding plug insertion hole is formed in the rear end face of the small-diameter part along the central axis, and the middle part of the lifting sliding plug is arranged in the sliding plug insertion hole; the lifting sliding plug comprises a front barrel shaft, a rear barrel shaft and a transmission plug head, the rear end of the rear barrel shaft is connected with a lifting sliding plug driving cylinder, and the lifting sliding plug driving cylinder is fixed in the first core barrel; the front end of the rear barrel shaft is provided with a barrel shaft inserting hole, and the rear end of the front barrel shaft is arranged in the barrel shaft inserting hole through a barrel shaft mounting bearing; a cylinder shaft transmission bevel gear is coaxially fixed on the front cylinder shaft; a barrel shaft transmission conical inner tooth groove is formed in the rear end face of the small-diameter portion, and the barrel shaft transmission conical inner tooth groove and the sliding plug insertion hole are coaxially arranged; the front end of the transmission plug head is provided with a non-circular transmission groove;
the speed reduction transmission set is arranged in the small-diameter part of the hub outer shell and comprises a support frame body, the rear end of the support frame body is symmetrically provided with a first support arm and a second support arm along the central axis, the first support arm and the second support arm respectively comprise a vertical rod and a horizontal rod, the inner side of the horizontal rod is vertically connected with the rear end of the vertical rod, and the front end of the vertical rod is fixedly connected to the support frame body; more than one spherical roller is arranged on the rear side surface of the cross rod, and a support frame stop inner magnetic block is embedded in the cross rod; the vertical rod is a rod body which can elastically stretch out and draw back along a straight line; an annular slide rail cavity with a pi-shaped cross section is formed in the rear end face of the small-diameter part, and cross rods of the first support arm and the second support arm are symmetrically arranged in the annular slide rail cavity; the annular slide rail cavity and the slide plug insertion hole are coaxially arranged;
the rear end of the lifting driving support is respectively provided with a first stop outer magnetic block and a second stop outer magnetic block through a first stop magnetic block connecting rod and a second stop magnetic block connecting rod, and when the first stop outer magnetic block and the second stop outer magnetic block move forwards along with the lifting driving support, the first stop outer magnetic block and the second stop outer magnetic block can attract the supporting frame stop inner magnetic blocks in the first supporting arm and the second supporting arm to enable the supporting frame body to keep a static state;
a sliding plug guide insertion hole with an opening at the rear end is formed in the rear end of the support frame body between the first support arm and the second support arm, a driving gear shaft through hole is formed in the bottom of the sliding plug guide insertion hole, a driving gear shaft penetrates through the driving gear shaft through hole, a non-circular transmission insertion block is fixed at one end, penetrating through the sliding plug guide insertion hole, of the driving gear shaft in the axial direction, and a first driving gear is fixed at one end, penetrating through the sliding plug guide insertion hole, of the driving gear shaft in the axial direction;
when the lifting sliding plug drives the telescopic shaft of the air cylinder to push the lifting sliding plug to move forwards until the transmission plug head is inserted into the sliding plug guide jack, the barrel shaft transmission bevel gear is inserted into a barrel shaft transmission conical inner tooth groove on the rear end face of the small-diameter part, the non-circular transmission insertion block at the rear end of the driving gear shaft is inserted into the non-circular transmission groove at the front end of the transmission plug head, the small-diameter part drives the front barrel shaft to synchronously rotate, the transmission plug head and the driving gear shaft are further driven to synchronously rotate, and meanwhile, the support frame body is kept in a static state.
3. The anti-surge durable high-efficiency mining fan according to claim 2, characterized in that: the first driving gear is meshed with and drives an Nth driving gear through at least three stages of intermediate speed reduction driving gear sets; the first driving gear, the intermediate speed reduction transmission gear set and the Nth driving gear are all arranged on the support frame body; the upper end face of the gear disc guide column is provided with a guide column driving inner tooth groove, and the Nth driving gear is arranged in the guide column driving inner tooth groove and is in meshed transmission with the guide column driving inner tooth groove, so that the gear disc guide column is driven to rotate around the central axis of the gear disc at a low speed.
4. The anti-surge durable high-efficiency mining fan according to claim 3, characterized in that: the middle speed reduction transmission gear set comprises an upper connecting rod, an upper gear shaft, a lower connecting rod and a lower gear shaft, the upper end of the upper connecting rod is mounted at the upper part of the support frame body, the lower end of the upper connecting rod is inserted with the upper gear shaft, the upper gear shaft is horizontally arranged and can rotate along the central axis of the upper gear shaft, and a front gear and an upper rear gear are respectively mounted at the front end and the rear end of the upper gear shaft; the lower end of the lower connecting rod is arranged at the lower part of the support frame body, a lower gear shaft is inserted at the upper end of the lower connecting rod, the lower gear shaft is horizontally arranged and can rotate along the central axis of the lower gear shaft, and a lower front gear and a lower rear gear are respectively arranged at the front end and the rear end of the lower gear shaft; the upper rear gear of the intermediate speed reduction transmission gear set is meshed with the first driving gear or the lower front gear of the previous intermediate speed reduction transmission gear set, and the upper front gear of the intermediate speed reduction transmission gear set is meshed with the lower rear gear of the same set; the transmission ratio of each stage of intermediate speed reduction transmission gear set is i = 60-120: 1.
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| CN113482978B (en) * | 2021-08-12 | 2024-03-19 | 浙江东方机电有限公司 | High-stability fan power system |
| CN117536920B (en) * | 2024-01-10 | 2024-04-02 | 辽宁中厨联智能厨房设备有限公司 | Kitchen summer heater with adjustable blowing angle |
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| GB1480872A (en) * | 1975-01-14 | 1977-07-27 | Berry Sa Ets | Fans comprising a rotor having pivotally mounted blades |
| US4140435A (en) * | 1977-05-26 | 1979-02-20 | Huber Herman L | Reversible fan |
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