CN111456948A - Drum-type conical air pump and drum impeller machining method - Google Patents

Drum-type conical air pump and drum impeller machining method Download PDF

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Publication number
CN111456948A
CN111456948A CN202010354396.5A CN202010354396A CN111456948A CN 111456948 A CN111456948 A CN 111456948A CN 202010354396 A CN202010354396 A CN 202010354396A CN 111456948 A CN111456948 A CN 111456948A
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China
Prior art keywords
rotating shaft
hub
blades
roller
frame
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CN202010354396.5A
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Chinese (zh)
Inventor
张建辉
陈晓生
陈震林
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Individual
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Priority to CN202010354396.5A priority Critical patent/CN111456948A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • 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
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/053—Shafts
    • 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
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/326—Rotors specially for elastic fluids for axial flow pumps for axial flow fans comprising a rotating shroud
    • 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
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • 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
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • 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
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • 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
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans
    • 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
    • F04D29/663—Sound attenuation
    • 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
    • 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
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/17—Alloys
    • F05D2300/173—Aluminium alloys, e.g. AlCuMgPb
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/21—Oxide ceramics
    • F05D2300/2102—Glass
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/614—Fibres or filaments

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to a roller type conical air pump and a roller impeller machining method. The novel roller pump comprises a pump body, a hub pump cover, a roller impeller and a driving motor, wherein a conical hole is formed in the pump body, an inner support frame is arranged in the conical hole, the roller impeller is assembled between the hub pump cover and the inner support frame in a rotating mode, the roller impeller is in a frustum shape and comprises a front hub frame, a rear hub frame and a frustum cylinder wall, a plurality of blades are arranged on the frustum cylinder wall, the diameter of the front hub frame is smaller than that of the rear hub frame, the front hub frame faces one side of the inner support frame, a first rotating shaft is arranged between the front hub frame and the inner support frame, one end of the first rotating shaft is fixedly connected with the front hub frame, the other end of the first rotating shaft is assembled with the inner support frame in a rotating mode, a second rotating shaft is arranged between the rear hub frame and the hub pump cover, the first rotating shaft. By adopting the roller type conical air pump, the condition that the volumetric air pump cannot continuously and stably output air flow is avoided.

Description

Drum-type conical air pump and drum impeller machining method
Technical Field
The invention relates to the technical field of air pumps, in particular to a drum-type conical air pump and a processing method of a drum impeller.
Background
The air pump is also called as an air pump and is widely applied to the occasions of air inflation, sewage treatment, electroplating air blowing, methane tank aeration, tunnel ventilation and the like. The existing air pump is mainly a positive displacement pump, the air pump mainly realizes the pumping of fluid by periodically adjusting the volume in a pump cylinder, and a hydraulic pump in daily life belongs to the positive displacement pump.
① the pump cavity needs to have better sealing property in order to improve the efficiency, which makes the manufacturing cost of the air pump higher, ② the air pump reduces the working efficiency of the air pump and generates noise easily because it does work in the pump cavity, ③ the output air flow of the air pump is limited by the size of the pump cavity, ④ the output air is intermittently output because the volumetric air pump has cycle of suction and discharge, ⑤ the air flow can not be stably and stably output, ⑤ the air pump is not easy to suck the outside impurities into the pump cavity for the working condition of sewage treatment, electroplating air blowing, aeration, tunnel ventilation and other with low air quality, which easily causes the oxidation, deterioration and odor of the residue in the pump cavity, and on the other hand, the friction resistance of the inner surface of the pump cavity is increased, which is not easy to be used for a long time, ⑥ the air pump also needs to overcome the pressure pulse in the process of the cycle movement, which easily accelerates the fatigue damage of the air pump.
Disclosure of Invention
The invention aims to provide a drum-type cone-shaped air pump, which is used for solving the technical problem that the air pump of a volume device in the prior art cannot stably output air flow. The invention also provides a processing method for processing the roller impeller in the roller type conical air pump.
In order to achieve the purpose, the invention provides a drum-type conical air pump, which adopts the following technical scheme:
a drum-type cone-shaped air pump comprises a pump body, a hub pump cover, a drum impeller and a driving motor, wherein a cone-shaped hole is formed in the pump body, an inner support frame is arranged in the cone-shaped hole, the hub pump cover is arranged on one side of a large hole of the cone-shaped hole, the inner support frame is arranged on one side of a small hole of the cone-shaped hole, the drum impeller is rotatably assembled between the hub pump cover and the inner support frame and is in a frustum shape, the drum impeller comprises a front hub frame, a rear hub frame and a frustum cylinder wall clamped between the front hub frame and the rear hub frame, a plurality of blades are arranged on the frustum cylinder wall, and the blades are distributed at intervals along the inner peripheral surface or the outer peripheral surface of the frustum cylinder wall; the diameter of the front hub frame is smaller than that of the rear hub frame, the front hub frame faces one side of the inner support frame, a first rotating shaft is arranged between the front hub frame and the inner support frame, one end of the first rotating shaft is fixedly connected with the front hub frame, the other end of the first rotating shaft is rotatably assembled with the inner support frame, a second rotating shaft is arranged between the rear hub frame and the hub pump cover, one end of the second rotating shaft is fixedly connected with the rear hub frame, the other end of the second rotating shaft is rotatably assembled with the hub pump cover, the first rotating shaft and the second rotating shaft are coaxially arranged, and the driving motor is in transmission connection with the second rotating shaft.
Furthermore, the hub pump cover and the inner support are both provided with vent holes for air flow to pass through.
Further, the blades are arranged on the inner circumferential surface of the frustum cylinder wall, and through holes for air flow to pass through are formed in the front hub frame and the rear hub frame.
Further, the blades are streamline, the height of each blade is increased and then decreased along the direction from back to front, and the distance between the highest point of each blade and the rear end of each blade is smaller than the distance between the highest point of each blade and the front end of each blade.
Further, a first stepped hole used for being rotatably assembled with the first rotating shaft is formed in the inner support frame, and a large hole of the first stepped hole faces to the rear side; the hub pump cover is provided with a second stepped hole which is rotatably assembled with the second rotating shaft, and a large hole of the second stepped hole faces the front side.
Furthermore, the blades are made of glass fiber, and the cone frustum cylinder wall is made of aluminum alloy.
Furthermore, the hub pump cover is provided with an annular step groove used for being in interference fit with the rear side of the pump body, the hub pump cover and the pump body are fixedly connected through a threaded connecting piece, the pump body is provided with an air faucet, and the air faucet is communicated with a small hole of the conical hole.
Further, the cone vertex angle corresponding to the conical hole is equal to the cone vertex angle corresponding to the cone frustum cylinder wall, and the angle of the cone vertex angle is 60-90 degrees.
The roller impeller processing method adopts the following technical scheme:
a method for processing a roller impeller comprises the following steps:
s1: cutting a sheet material according to the development of the wall of the frustum;
s2: marking the positions of a plurality of blades and the shapes of the blades on a sheet material at intervals according to a certain distance, and cutting each blade on the sheet material;
s3: turning over a plurality of blades towards one end of the sheet material at a certain angle;
s4: two generatrices of the sheet material are connected and combined together to form a circular truncated cone shape, and meanwhile, the blades are ensured to face towards the inner side of the roller impeller.
The roller impeller processing method adopts the following technical scheme:
a method for processing a roller impeller comprises the following steps:
s1: cutting a sheet material according to the development of the wall of the frustum;
s2: marking the positions of the blades on the sheet material at intervals according to a certain distance, and cutting a plurality of gaps at the marked positions;
s3: obtaining a plurality of blades through a processing technology of injection molding, 3D printing or three-dimensional curved surface processing;
s4: inserting the blades obtained in the previous step into a plurality of gaps of the sheet material towards the same side and fixing the blades;
s5: two generatrices of the sheet material are connected and combined together to form a circular truncated cone shape, and meanwhile, the blades are ensured to face towards the inner side of the roller impeller.
Compared with the prior art, the roller type conical air pump provided by the embodiment of the invention has the beneficial effects that: by adopting the roller type conical air pump, when air flow needs to be pumped, the driving motor can drive the second rotating shaft to rotate by starting the driving motor, so that the roller impeller is driven to rotate, and each blade on the roller impeller can generate a thrust effect on the air flow, so that the air flow can be stably output from the small hole opening of the conical hole, and the condition that the volumetric air pump cannot continuously and stably output the air flow is avoided.
Drawings
Fig. 1 is a schematic view of the overall structure of a roller cone type air pump according to an embodiment of the present invention;
FIG. 2 is a rear view schematically illustrating a drum impeller of the drum type taper type air pump according to the embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken at A-A in FIG. 2;
FIG. 4 is a schematic view showing a vane structure of a roller cone type air pump according to an embodiment of the present invention;
fig. 5 is an expanded view of the frustum wall of the roller cone type air pump according to the embodiment of the present invention.
In the figure, 1-driving motor, 2-pump body, 3-taper hole, 4-roller impeller, 5-hub pump cover, 6-inner support frame, 7-threaded connector, 8-air nozzle, 9-blade, 10-rear hub frame, 11-cone frustum cylinder wall, 12-front hub frame, 13-second rotating shaft, and 14-first rotating shaft.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1 to 5, a roller type cone air pump according to a preferred embodiment of the present invention. The drum-type cone-shaped air pump comprises a pump body 2, a hub pump cover 5, a drum impeller 4 and a driving motor 1, wherein a cone-shaped hole is formed in the pump body 2, an inner support frame 6 is arranged in the cone-shaped hole, the hub pump cover 5 is arranged on one side of a large hole opening of the cone-shaped hole, the inner support frame 6 is arranged on one side of a small hole opening of the cone-shaped hole, the drum impeller 4 is rotatably assembled between the hub pump cover 5 and the inner support frame 6, the drum impeller 4 is in a cone frustum shape, the drum impeller 4 comprises a front hub frame 12, a rear hub frame 10 and a cone frustum cylinder wall 11 clamped between the front hub frame 12 and the rear hub frame 10, a plurality of blades 9 are arranged on the cone frustum cylinder wall 11, and the blades 9 are arranged at intervals along the inner peripheral surface or the outer; the diameter of the front hub frame 12 is smaller than that of the rear hub frame 10, the front hub frame 12 faces one side of the inner support frame 6, a first rotating shaft 14 is arranged between the front hub frame 12 and the inner support frame 6, one end of the first rotating shaft 14 is fixedly connected with the front hub frame 12, the other end of the first rotating shaft 14 is rotatably assembled with the inner support frame 6, a second rotating shaft 13 is arranged between the rear hub frame 10 and the hub pump cover 5, one end of the second rotating shaft 13 is fixedly connected with the rear hub frame 10, the other end of the second rotating shaft 13 is rotatably assembled with the hub pump cover 5, the first rotating shaft 14 and the second rotating shaft 13 are coaxially arranged, and the driving motor 1 is in transmission connection with the second rotating shaft 13.
Specifically, in this embodiment, the pump body 2 is in a frustum shape, the pump body 2 is internally provided with a tapered hole 3 for assembling the roller impeller 4, the roller impeller 4 is also in a frustum shape in this embodiment, a cone vertex angle corresponding to the roller impeller 4 is the same as a cone vertex angle corresponding to the tapered hole 3, both the cone vertex angle corresponding to the roller impeller 4 and the cone vertex angle corresponding to the tapered hole 3 in this embodiment are located at 60 °, and angles of the cone vertex angles in other embodiments may be any values between 60 ° and 90 °, such as 65 °, 70 °, 75 °, 80 °, 85 °, 90 °, and the like.
In this embodiment, the hub pump cover 5 and the pump body 2 are detachably mounted, the hub pump cover 5 is mounted on one side of the large hole of the tapered hole 3, the hub pump cover 5 is in a hub shape in this embodiment, the hub pump cover 5 comprises a circular ring frame and a support rod, an annular step groove is formed in the inner side of the circular ring frame in this embodiment, a circular ring flanging is arranged at the rear end of the pump body 2, the end face of the circular ring flanging is used for being stopped and limited with the step face of the annular step groove, and the outer peripheral face of the circular ring flanging is used for being in interference fit with the inner groove wall of. In order to enhance the structural strength, the hub pump cover 5 and the pump body 2 are fixedly connected through a plurality of threaded connectors 7 in the embodiment. In this embodiment, the threaded connecting member 7 is a bolt, as shown in fig. 1, a plurality of threaded holes are disposed at equal intervals on the ring frame in this embodiment, and a plurality of blind threaded holes are correspondingly disposed on the ring flange, and when the ring is fixed, the threaded connecting member 7 is screwed into the corresponding threaded holes and blind threaded holes.
The bracing piece has threely in this embodiment, and three bracing piece forms "people" style of calligraphy, and three bracing piece all extends along the radius of ring frame promptly and arranges, and the intersection position department of three bracing piece is provided with a ring post, and the one end of three bracing piece all with the outer peripheral face fixed connection of ring post, the other end all with ring frame fixed connection. The inner ring of the bearing and the second rotating shaft 13 are in interference fit in the embodiment, the outer ring of the bearing and the large hole wall of the second stepped hole are in interference fit, in other embodiments, in order to avoid the situation that the bearing is separated from the second stepped hole, an annular cover used for plugging the bearing in the second stepped hole is further arranged on one side of the large hole opening of the second stepped hole, and a through hole for the second rotating shaft 13 to pass through is formed in the annular cover. In this embodiment, one end of the second rotating shaft 13 is in transmission connection with the output shaft of the driving motor 1, the transmission connection mode is coupling connection, and the other end of the second rotating shaft 13 is fixedly connected with the drum impeller 4.
In this embodiment, an inner support frame 6 is further disposed in the tapered hole 3, the inner support frame 6 is also in a shape of a Chinese character 'ren', the overall structure of the inner support frame 6 is the same as the structures of the three support rods and the circular column, and detailed description is omitted in this embodiment. It should be noted that, in the present embodiment, a first stepped hole for rotationally assembling with the first rotating shaft 14 is provided in the circular column of the inner support frame 6, and a large orifice of the first stepped hole also faces the drum impeller 4 side in the present embodiment, that is, the large orifice of the first stepped hole and the large orifice of the second stepped hole are oppositely arranged. Similarly, in this embodiment, a bearing is also installed in the first stepped hole, the bearing is also a deep groove ball bearing, and the assembly method of the bearing is the same as that of the bearing in the second stepped hole, which is not described herein again. In this embodiment, one end of the first rotating shaft 14 is interference-fitted with the bearing inner ring in the first stepped hole, and the other end is fixedly connected with the drum impeller 4. In this embodiment, the first rotating shaft 14 and the second rotating shaft 13 are coaxially and collinearly arranged, so that when the driving motor 1 drives the second rotating shaft 13 to rotate, the first rotating shaft 14 and the drum impeller 4 rotate synchronously. In this embodiment, because wheel hub pump cover 5 and inner support frame 6 are "herringbone" support body, the space in wheel hub pump cover 5 and the inner support frame 6 constitutes the ventilation hole that supplies the air current to pass through in this embodiment promptly, and the ventilation hole is fan-shaped in this embodiment, and the fan-shaped central angle that the ventilation hole corresponds is 120. Because the air flow in the embodiment flows in from the side of the hub pump cover 5 and then flows out from the side of the small hole of the tapered hole 3, the structural design reduces the backflow of the external fluid into the pump body 2 to a certain extent, and is beneficial to the unidirectional pumping of the fluid from the input port to the output port.
As shown in fig. 2 and 3, the drum impeller 4 in this embodiment includes a front hub frame 12, a rear hub frame 10, and a frustum tube wall 11 clamped between the front hub frame 12 and the rear hub frame 10, each of the front hub frame 12 and the rear hub frame 10 includes an annular ring and straight rods fixed in the annular ring, the annular ring in this embodiment is annular, three straight rods are provided in each annular ring, the three straight rods are provided at equal intervals along the circumferential direction, namely, any two adjacent straight rods are spaced by 120 degrees, a fixed cylinder is arranged at the center intersection of the three straight rods and is used for being fixedly connected with a first rotating shaft 14 or a second rotating shaft 13, in the embodiment, the first rotating shaft 14 and the second rotating shaft 13 are fixedly connected with the fixed cylinder in a threaded connection mode, namely, the outer peripheries of the first rotating shaft 14 and the second rotating shaft 13 are both provided with external threads, and the corresponding fixed cylinder is internally provided with internal threads. In other embodiments, the first rotating shaft 14 and the second rotating shaft 13 may also be directly welded or fixed to the fixed cylinder by bolts or pins. In this embodiment, the annular ring is further provided with an annular step groove, the annular step groove is used for inserting the corresponding end of the frustum cylinder wall 11, in order to make the annular step groove contact with the outer surface of the frustum cylinder wall 11 in an attaching manner, the cross section of the annular step groove of the rear hub carrier 10 in this embodiment is an acute angle structure, and the cross section of the annular step groove of the front hub carrier 12 is an obtuse angle structure. Since the structures of the front hub carrier 12 and the rear hub carrier 10 are similar to the structure of the hub pump cover 5 in the present embodiment, detailed descriptions of the structures of the front hub carrier 12 and the rear hub carrier 10 will be omitted. It should be noted that, since any two adjacent straight rods of the front hub frame 12 and the rear hub frame 10 in this embodiment enclose a fan-shaped hole, which forms a through hole for the air flow to flow into the frustum cylinder wall 11 in this embodiment, as shown in fig. 2, the angle of the center of the circle corresponding to the fan-shaped hole is 120 degrees,
in this embodiment, a plurality of vanes 9 are provided on the frustum tube wall 11, each vane 9 is provided on the inner tube wall of the frustum tube wall 11, and the vanes 9 are provided at equal intervals in the circumferential direction. In other embodiments the vanes 9 may also be arranged on the outer surface of the cone wall 11. As shown in fig. 4, each of the blades 9 in this embodiment is streamlined, that is, the height of the blade 9 is increased and then decreased along the direction from the back to the front, and the distance between the highest point of the blade 9 and the back end of the blade 9 in this embodiment is smaller than the distance from the front end of the blade 9, that is, the front of the blade 9 has a smaller gradient of inclination than the rear of the blade 9. The structural design enables the vanes 9 to play two roles, wherein one role is that the torsional angle of the vanes 9 generates thrust force to air flow along the pumping direction, and the other role is that the front surface and the rear surface of the vanes 9 generate pressure difference to provide aerodynamic force to fluid along the pumping direction. In addition, due to the wall attachment effect of the jet flow of the fluid on the blades 9, the pressure difference between the front and the back of the blades 9 is increased, the aerodynamic force towards the pumping direction is increased, and therefore the pumping efficiency of the air pump can be improved more remarkably. Under the combined action of the two, the air pump generates unidirectional pumping airflow from the input end to the output end, the flow field velocity vector of the pumping airflow is in a spiral streamline shape, and the air pump can fully stir and mix fluid entering from the input port and continuously pump the fluid to the external environment. Each blade 9 is spatially helical in the present embodiment, and each blade 9 may be linear in other embodiments.
In this embodiment, the pump body 2 is further integrally provided with an air faucet 8, the air faucet 8 is arranged on one side of the small hole opening of the tapered hole 3, the air faucet 8 is in a circular tube shape, and in other embodiments, the air faucet 8 may also be in a tapered tube shape.
In this embodiment, the material of the cone-shaped cylinder wall 11 is aluminum alloy, the material of the blade 9 is glass fiber, and in other embodiments, the blade 9 may be made of other fiber composite materials. Because the air pump is in operation, the inner wall surface of the roller impeller 4 and the blades 9 are both in direct contact with the pumped fluid, the blades 9 of the roller impeller 4 need to have certain hardness and certain oxidation resistance and corrosion resistance, the chemical corrosion of the surface caused by the contact of the fluid with the metal roller and the blades 9 is avoided, and the service life of the air pump is prolonged. The glass fiber is an inorganic non-metallic material with excellent performance, good insulativity, strong heat resistance, good corrosion resistance and high mechanical strength. Therefore, the blades 9 are made of glass fiber materials to meet the working condition requirement of the air pump. In addition, the connecting part of the blade 9 and the cylinder wall of the material can be adhered in a gap of the cylinder wall of the cylinder in a hot adhesion mode at the melting temperature without other connecting pieces, the structure is simple, the blade 9 and the cylinder can be approximately considered as a whole in the hot adhesion mode, the connection is stable and reliable, the noise generated during rotation is reduced, the vibration energy transmission loss of energy is reduced, the pumping efficiency of the air pump is improved, meanwhile, the phenomenon that the unnecessary vibration is caused due to the unreliable connection of other connecting modes is reduced, the roller impeller 4 is subjected to fatigue wear, and the service life of the air pump is prolonged. In addition, because the aluminum alloy has low density but higher strength which is close to or exceeds high-quality steel, the weight of the roller impeller 4 is reduced to a certain extent on the premise that the roller impeller 4 is not easy to generate fatigue damage when the air pump works, and the energy loss is reduced when the roller does the rotary motion. In addition, the aluminum alloy material has good plasticity, is convenient for secondary processing, and is beneficial to manufacturing the roller and the blade 9; the anti-corrosion air pump has excellent anti-corrosion performance, reduces the possibility of chemical corrosion caused by contacting with the aromatherapy essential oil to a certain extent, and prolongs the service life of the air pump.
As shown in fig. 5, the frustum cylinder wall 11 in this embodiment is formed by rolling a sheet material, and the blades 9 in this embodiment have a triangular shape, and the number of the blades 9 is six, and the blades are attached to the cylinder wall inside the drum. The drum impeller 4 with the blades 9 according to the preferred embodiment of the present invention is a combined structure, i.e., the frustum cylinder wall 11 and the blades 9 are independent components, and in other embodiments, the frustum cylinder wall 11 and the blades 9 may be an integral body.
The combined machining mode of the cone frustum cylinder wall 11 and the blades 9 in the embodiment is as follows: designing the size of a required frustum cylinder wall 11, and cutting a sheet material according to a size development drawing of the frustum cylinder wall 11; marking the position of the blade 9 on the sheet material at the same distance interval, as shown in fig. 5, wherein the solid line of the blade 9 is the position of the blade 9, and cutting a plurality of gaps at the marked position (namely the position of the solid line) by utilizing a laser cutting or machining process; step three, according to the designed size of the blade 9, taking the material of the blade 9 as glass fiber, and obtaining a plurality of blades 9 through a processing technology of injection molding, 3D printing or three-dimensional curved surface processing; step four, heating the connecting part of the blade 9 and the cylinder wall (namely the position of the blade 9 in a solid line in fig. 5) obtained in the last step to a melting temperature, thermally adhering the blade 9 in a plurality of gaps of the sheet material and fixing the blade according to the shape position shown in fig. 5, wherein the front surface of the blade 9 faces to the same side; and step five, connecting and combining two generatrices (namely sidelines on two sides of the graph 5) of the sheet material together to form a circular truncated cone shape, and simultaneously ensuring that the blades 9 face the inner side of the cone frustum cylinder wall 11 and the front faces of the blades 9 face a large port of the cone frustum cylinder wall 11.
In other embodiments, the vane 9 and the frustum cylinder wall 11 may also be of an integral structure, and may be integrally injection-molded or 3D-printed on the frustum cylinder wall 11, or may be obtained by machining, and the frustum cylinder wall 11 and the vane 9 are machined as follows: designing the size of a required frustum cylinder wall 11, and cutting a sheet material according to an expansion drawing of the size of the frustum cylinder wall 11; marking the positions of a plurality of blades 9 and the shapes of the blades 9 on the sheet material at the same distance intervals, and cutting the blades 9 on the sheet material by a machining process of a three-dimensional curved surface; step three, turning over a plurality of blades 9 at a certain angle towards the same side of the sheet material at the same time; and step four, connecting and combining two generatrices of the sheet material together to form a circular truncated cone shape, and simultaneously ensuring that the blades 9 face the inner side of the circular truncated cone wall 11.
The working process of the invention is as follows: when the air flow needs to be pumped, the driving motor 1 is started, the driving motor 1 can drive the first rotating shaft 14 and the second rotating shaft 13 to rotate, the roller impeller 4 is driven, and the air flow is blown to the air nozzle 8 by the blades 9 rotating on the roller impeller 4, so that the air flow is pumped.
Example 1 of the method for processing a drum impeller of the present invention: the method for processing the roller impeller is the same as the method for processing the combined type of the roller cone type air pump, and the detailed description thereof is omitted in this embodiment.
Example 2 of the method for processing a drum impeller of the present invention: the method for processing the roller impeller is the same as the method for processing the integral roller cone type air pump, and the detailed description thereof is omitted in this embodiment.
To sum up, the embodiment of the present invention provides a roller type conical air pump, which enables an air flow to be stably output from a small hole of the conical hole 3 by using the roller type conical air pump of the present invention, thereby avoiding a situation that a volumetric air pump cannot continuously and stably output the air flow. In addition, the air pump has the advantages of simple structure, convenience and simplicity in manufacturing, capability of pumping air more efficiently, reduction in fatigue loss of the air pump, prolongation of the service life of the air pump and reduction in backflow of air flow of the air pump to a certain extent.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (10)

1. A drum-type cone-shaped air pump is characterized in that: the roller impeller is rotatably assembled between the hub pump cover and the inner support frame, the roller impeller is frustum-shaped, the roller impeller comprises a front hub frame, a rear hub frame and a frustum cylinder wall clamped between the front hub frame and the rear hub frame, a plurality of blades are arranged on the frustum cylinder wall, and the blades are distributed at intervals along the inner peripheral surface or the outer peripheral surface of the frustum cylinder wall; the diameter of the front hub frame is smaller than that of the rear hub frame, the front hub frame faces one side of the inner support frame, a first rotating shaft is arranged between the front hub frame and the inner support frame, one end of the first rotating shaft is fixedly connected with the front hub frame, the other end of the first rotating shaft is rotatably assembled with the inner support frame, a second rotating shaft is arranged between the rear hub frame and the hub pump cover, one end of the second rotating shaft is fixedly connected with the rear hub frame, the other end of the second rotating shaft is rotatably assembled with the hub pump cover, the first rotating shaft and the second rotating shaft are coaxially arranged, and the driving motor is in transmission connection with the second rotating shaft.
2. The roller cone type air pump as claimed in claim 1, wherein: and the hub pump cover and the inner support are both provided with ventilation holes for air flow to pass through.
3. The roller cone type air pump as claimed in claim 1, wherein: the blades are arranged on the inner circumferential surface of the cone frustum cylinder wall, and through holes for air flow to pass through are formed in the front hub frame and the rear hub frame.
4. The roller cone type air pump as claimed in claim 1, wherein: the blades are streamline, the height of each blade is increased and then reduced along the direction from back to front, and the distance between the highest point of each blade and the rear end of each blade is smaller than the distance between the highest point of each blade and the front end of each blade.
5. The roller cone type air pump as claimed in claim 1, wherein: the inner support frame is provided with a first stepped hole which is used for being rotatably assembled with the first rotating shaft, and a large hole of the first stepped hole faces to the rear side; the hub pump cover is provided with a second stepped hole which is rotatably assembled with the second rotating shaft, and a large hole of the second stepped hole faces the front side.
6. The roller cone type air pump as claimed in claim 1, wherein: the blade is made of glass fiber, and the cone wall is made of aluminum alloy.
7. The roller cone type air pump as claimed in claim 1, wherein: the hub pump cover is provided with an annular step groove used for being in interference fit with the rear side of the pump body, the hub pump cover and the pump body are fixedly connected through a threaded connecting piece, the pump body is provided with an air faucet, and the air faucet is communicated with a small hole of the conical hole.
8. The roller cone type air pump as claimed in claim 1, wherein: the cone vertex angle corresponding to the conical hole is equal to the cone vertex angle corresponding to the cone frustum cylinder wall, and the angle of the cone vertex angle is 60-90 degrees.
9. A roller impeller machining method is characterized by comprising the following steps:
s1: cutting a sheet material according to the development of the wall of the frustum;
s2: marking the positions of a plurality of blades and the shapes of the blades on a sheet material at intervals according to a certain distance, and cutting each blade on the sheet material;
s3: turning over a plurality of blades towards one end of the sheet material at a certain angle;
s4: two generatrices of the sheet material are connected and combined together to form a circular truncated cone shape, and meanwhile, the blades are ensured to face towards the inner side of the roller impeller.
10. A roller impeller machining method is characterized by comprising the following steps:
s1: cutting a sheet material according to the development of the wall of the frustum;
s2: marking the positions of the blades on the sheet material at intervals according to a certain distance, and cutting a plurality of gaps at the marked positions;
s3: obtaining a plurality of blades through a processing technology of injection molding, 3D printing or three-dimensional curved surface processing;
s4: inserting the blades obtained in the previous step into a plurality of gaps of the sheet material towards the same side and fixing the blades;
s5: two generatrices of the sheet material are connected and combined together to form a circular truncated cone shape, and meanwhile, the blades are ensured to face towards the inner side of the roller impeller.
CN202010354396.5A 2020-04-28 2020-04-28 Drum-type conical air pump and drum impeller machining method Pending CN111456948A (en)

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Application publication date: 20200728