CN112943679A - Rotating shaft transmission structure, air compression device, fan, cutting machine and airplane blade - Google Patents
Rotating shaft transmission structure, air compression device, fan, cutting machine and airplane blade Download PDFInfo
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- CN112943679A CN112943679A CN202110097648.5A CN202110097648A CN112943679A CN 112943679 A CN112943679 A CN 112943679A CN 202110097648 A CN202110097648 A CN 202110097648A CN 112943679 A CN112943679 A CN 112943679A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 100
- 230000006835 compression Effects 0.000 title claims abstract description 67
- 238000007906 compression Methods 0.000 title claims abstract description 67
- 238000005520 cutting process Methods 0.000 title claims abstract description 16
- 239000012530 fluid Substances 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/02—Hub construction
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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
- F04D19/00—Axial-flow pumps
- F04D19/007—Axial-flow pumps multistage 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
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage 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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
-
- 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
- F04D29/056—Bearings
- F04D29/0563—Bearings cartridges
-
- 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
- F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
- F04D29/324—Blades
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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
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a rotating shaft transmission structure, which comprises a support, a rotating shaft and N hollow shafts, wherein the diameters of the N hollow shafts are sequentially reduced, the N hollow shafts are sequentially sleeved and can rotate relatively, and the rotating shaft penetrates through an inner hole of the hollow shaft at the innermost layer; the bearing is connected with the outmost hollow shaft, the hollow shafts are connected with the hollow shaft, and the rotating shaft is connected with the innermost hollow shaft through the bearing, and the rotating speeds of the N hollow shafts and the rotating shaft are sequentially increased from outside to inside. The rotating shaft transmission structure provided by the invention has the advantages that through the relative movement of the hollow shaft and the rotating shaft, even if the rotating shaft rotates at an ultrahigh speed, the bearing still bears the rotating shaft to rotate at a low speed, so that the common rolling bearing can realize the supporting transmission of the rotating shaft, and the bearings in the air compression device, the cutting machine, the fan and the airplane blade applying the rotating shaft transmission structure cannot generate heat and deform due to high-speed rotation, so that good working conditions are kept.
Description
Technical Field
The invention relates to the field of power transmission, in particular to a rotating shaft transmission structure, an air compression device, a fan, a cutting machine and an airplane blade.
Background
Along with the rapid development of scientific technology, in the mechanical field, a rotating shaft transmission structure is more and more commonly applied, the diameter of a rotating shaft often influences the numerical value of high-speed rotating speed, the rotating shafts with smaller diameters exceed 10000 rpm and are high-speed rotating speed, the rotating shafts with larger diameters reach 1000 rpm and are high-speed rotating speed, and common rolling bearings in the market are difficult to bear ultrahigh rotating speed, are easy to generate heat and deform to cause damage, and are short in service life. Therefore, a high-speed bearing is generally selected for the rotating shaft transmission mechanism, the high-speed bearing is expensive, and high-pressure lubricating oil is injected during working to enable the rotating shaft to be suspended in the high-speed bearing, so that a high-pressure oil injection device is required to be arranged in a common rotating shaft device, and a common rolling bearing can work only by injecting normal-pressure lubricating oil, but cannot be used for supporting the rotating shaft.
It is seen that improvements and enhancements to the prior art are needed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a rotating shaft transmission structure, an air compression device, a fan and a cutting machine, and aims to solve the technical problem that a common rolling bearing cannot bear a rotating shaft.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rotating shaft transmission structure comprises a support, a rotating shaft and N hollow shafts, wherein the diameters of the N hollow shafts are sequentially reduced, the N hollow shafts are sequentially sleeved and can rotate relatively, and the rotating shaft penetrates through an inner hole of the hollow shaft at the innermost layer; the bearing is connected with the outmost hollow shaft, the hollow shafts are connected with the hollow shaft, the rotating shaft is connected with the innermost hollow shaft through the bearing, the outmost hollow shaft is the first hollow shaft, the rotating speeds of the N hollow shafts and the rotating shaft sequentially increase from outside to inside, and N is an integer greater than or equal to 1.
Two ends of the hollow shaft of the innermost layer are respectively connected with the rotating shaft through at least one bearing; two ends of the hollow shaft at the outermost layer are respectively connected with the support through at least one bearing; two ends of the hollow shaft at the outermost layer are respectively connected with the adjacent hollow shafts through at least one bearing. And the rotating shaft and the N hollow shafts are synchronously driven by a second driving device.
The rotating shaft is driven by a first driving device and drives the hollow shaft of the innermost layer to rotate through a transmission assembly; the transmission assembly comprises a driving impeller sleeved on the rotating shaft and a driven impeller fixedly arranged on the innermost hollow shaft, and the driving impeller and the driven impeller are symmetrically arranged and drive the driven impeller to rotate through a fluid medium.
And the rotating shaft and the N hollow shafts are synchronously driven by a second driving device.
The second driving device comprises a second driving motor, a transmission shaft in transmission connection with an output shaft of the second driving motor and a plurality of groups of transmission assemblies; each hollow shaft and each rotating shaft are connected with a transmission shaft through a group of transmission assemblies, each transmission assembly comprises a driving wheel sleeved on the transmission shaft, a driven wheel sleeved on the tail part of the corresponding hollow shaft/rotating shaft and a transmission belt; the driving wheel and the driven wheel are in transmission connection through a transmission belt, and the transmission ratios of the transmission assemblies corresponding to the N hollow shafts and the rotating shaft are sequentially decreased progressively according to the sleeving sequence from outside to inside.
The utility model provides an use pivot transmission structure's air compression device, still including the air compression room of the air inlet and the gas outlet of seting up mutual intercommunication, the cross sectional area of air compression room is reduced gradually to the gas outlet by the air inlet, the head end of every hollow shaft and pivot all stretches into the inside of air compression room and is connected with the fan blade from the air inlet of air compression room, every hollow shaft and pivot all include the working section that stretches into the inside of air compression room and set up the transmission section in the air compression room outside, the working section length of N root hollow shaft and pivot increases in proper order and is close to towards the gas outlet direction of air compression room, the head end of pivot is closest to the gas outlet of air compression room.
The air compression chamber is in a truncated cone shape, the air inlet and the air outlet are respectively arranged at two ends of the air compression chamber, and the diameter of the air inlet is larger than that of the air outlet; the diameters of the N hollow shafts and the blades on the rotating shaft are sequentially reduced, and the diameter of the blades on the rotating shaft is the minimum; the distance between the outer circumference of each fan blade and the inner wall of the air compression chamber is equal; the fan blade comprises a shaft sleeve and a plurality of blades fixed on the outer wall of the shaft sleeve.
The fan with the rotating shaft transmission structure further comprises blades arranged on the head end of the rotating shaft.
The utility model provides an use cutting machine of pivot transmission structure, still includes the cutting blade of setting on the pivot head end.
The aircraft blade applying the rotating shaft transmission structure further comprises a blade arranged on the head end of the rotating shaft.
Has the advantages that:
compared with the prior art, the rotating shaft transmission structure provided by the invention has the advantages that through the relative movement of the hollow shaft and the rotating shaft, even if the rotating shaft rotates at an ultrahigh speed, the bearing still bears the rotating shaft to rotate at a low speed, so that the common rolling bearing can realize the supporting transmission of the rotating shaft, and the bearings in the air compression device, the cutting machine and the fan which are applied with the rotating shaft transmission structure cannot generate heat and deform due to high-speed rotation to cause clamping damage, so that a good working condition is kept, and the service life is long.
Drawings
Fig. 1 is a schematic diagram of the sleeve connection between the rotating shaft and the hollow shaft in the rotating shaft transmission structure provided by the present invention.
Fig. 2 is a schematic view showing the assembly of a transmission assembly in the rotating shaft transmission structure provided by the invention.
Fig. 3 is a second schematic view of the assembly of the transmission assembly in the rotating shaft transmission structure provided by the invention.
Fig. 4 is a schematic structural diagram of an air compression device provided by the present invention.
Fig. 5 is a schematic structural diagram of the fan provided by the present invention.
Fig. 6 is a schematic structural diagram of the cutting machine provided by the present invention.
Fig. 7 is a schematic structural view of an aircraft blade provided by the present invention.
Description of the main element symbols: 1-support, 2-rotating shaft, 4-bearing, 5-second driving device, 51-second driving motor, 52-transmission shaft, 6-transmission component, 61-driving wheel, 62-driven wheel, 63-transmission belt, 7-air compression chamber, 72-air inlet, 73-air outlet, 81-first fan blade, 82-second fan blade, 83-third fan blade, 84-first compression cavity, 85-second compression cavity and 86-third compression cavity.
Detailed Description
The invention provides a rotating shaft transmission structure, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
Referring to fig. 1, the present invention provides a rotating shaft transmission structure, which includes a support 1, a rotating shaft 2, N hollow shafts with sequentially reduced diameters, which are sequentially sleeved and can rotate relatively, wherein the rotating shaft 2 penetrates through an inner hole of the hollow shaft at the innermost layer; the bearing 1 is connected with the outmost hollow shaft, the hollow shafts are connected with the hollow shaft, the rotating shaft 2 is connected with the innermost hollow shaft through the bearing 4, the outmost hollow shaft is the first hollow shaft, the rotating speeds of the N hollow shafts and the rotating shaft 2 are sequentially increased from outside to inside, and N is an integer greater than or equal to 1.
For convenience of explaining the working principle, in this embodiment, N is 2, the first hollow shaft 31 is the outermost hollow shaft, and when the device works, the rotating speeds of the two hollow shafts and the rotating shaft 2 are sequentially increased, assuming that the rotating speed of the first hollow shaft 31 is 3600 rpm, the rotating speed of the second hollow shaft 32 is 7200 rpm, and the rotating speed of the rotating shaft 2 is 10800 rpm; it can be understood that the support 1 is stationary and the first hollow shaft 31 moves at 3600 rpm relative to the support 1, i.e. the bearing 4 arranged between the support 1 and the first hollow shaft 31 is subjected to 3600 rpm; since the moving speed of the second hollow shaft 32 relative to the first hollow shaft 31 is 3600 rpm (the difference between the second hollow shaft and the first hollow shaft 31), that is, the bearing 4 disposed between the first hollow shaft 31 and the second hollow shaft 32 bears the rotation speed of 3600 rpm; the rotating speed of the rotating shaft 2 relative to the second hollow shaft 32 is 3600 revolutions per minute (the difference between the rotating speed of the rotating shaft 2 and the rotating speed of the second hollow shaft 32), namely the bearing 4 arranged between the second hollow shaft 32 and the rotating shaft 2 bears the rotating speed of 3600 revolutions per minute; therefore, the rotating speed of each bearing 4 is the same, even if the rotating shaft 2 rotates at an ultrahigh speed and exceeds 10000 rpm, the bearing 4 still bears low-speed rotation, so that the bearing 4 is completely a common rolling bearing, the heating deformation caused by high-speed rotation cannot occur, the clamping damage is avoided, a good working condition is kept, and the service life is long.
Specifically, two ends of the hollow shaft at the innermost layer are respectively connected with the rotating shaft 2 through at least one bearing 4. The two ends of the hollow shaft on the outermost layer are respectively connected with the support 1 through at least one bearing 4. The two ends of the hollow shaft on the outermost layer are respectively connected with the support 1 through at least one bearing 4. Through the arrangement, each hollow shaft and each rotating shaft rotate stably in the working process, and the working reliability of the rotating shaft is ensured.
In a preferred embodiment, as shown in fig. 2 and 3, the rotating shaft 2 is driven by a first driving device, and the rotating shaft 2 drives the hollow shaft 33 at the innermost layer to rotate through a transmission assembly; the transmission assembly comprises a driving impeller 21 sleeved on the rotating shaft 2 and a driven impeller 22 fixedly arranged on the innermost hollow shaft, wherein the driving impeller 21 and the driven impeller 22 are symmetrically arranged and drive the driven impeller 22 to rotate through a fluid medium. In practical application, the driving impeller 21 has a plurality of driving flaps 211 arranged circumferentially, the driven impeller 22 is also provided with a plurality of driven flaps 221 arranged circumferentially, and fluid media (such as gas and liquid) are located between the driving flaps 211 and the driven flaps 221, and because the driving impeller 21 and the driven impeller 22 are symmetrically arranged, when the driving flaps 211 are driven by the rotating shaft 2 to rotate, the driving flaps 211 disturb the fluid media to generate fluid driving force, so that the fluid media apply the fluid driving force to the driven flaps 221, and the hollow shaft at the innermost layer rotates in the same direction as the rotating shaft 2. The rotating speed of the hollow shaft 33 at the innermost layer can be controlled by adjusting the stress area of each driven flap, and the larger the stress area of the driven flap is, the larger the rotating speed of the hollow shaft at the innermost layer is.
The rotating shaft transmission mechanism can also be applied to development and manufacturing of equipment with a large rotating shaft diameter and multilayer conjoined bearings, such as a crusher or an airplane blade, and the rotating shaft rotates at a high speed when the rotating shaft exceeds 1000 revolutions per minute. For example, the first driving device drives the large rotating shaft to rotate at a high speed of 1000 rpm, that is, the driving impeller on the large rotating shaft also rotates at a speed of 1000 rpm, the driving impeller 21 drives the driven impeller 22 to rotate through a fluid medium, so that the driven impeller and the hollow shaft connected with the driven impeller rotate at a speed of 750 rpm, the difference between the outer ring and the inner ring of the bearing 4 is the actual working speed of the bearing, that is, the bearing 4 arranged between the hollow shaft 33 at the innermost layer and the large rotating shaft bears a speed of 250 rpm, and the bearing only needs to bear a low speed of 250 rpm, and the bearing is a common rolling bearing, so that a good working condition can be maintained, seizure damage is avoided, and the service life is long.
When N is more than or equal to 2 integers, the transmission assembly is also arranged between the hollow shaft and the hollow shaft, and through the arrangement, the rotating speeds of the N hollow shafts and the rotating shaft 2 are sequentially decreased from inside to outside, so that the bearing 4 arranged between the hollow shaft and the hollow shaft rotates at a low speed, and the bearing can still keep a good working condition by using a common rolling bearing, thereby avoiding the clamping damage and having long service life.
Therefore, the first driving device in the embodiment only needs to directly drive the rotating shaft to rotate, and drives the hollow shaft to synchronously and unidirectionally rotate by means of the transmission assembly, the structure is simple and ingenious, the power loss is small, the first driving device comprises a first driving motor, and the first driving motor can drive the hollow shaft to rotate by the gear transmission assembly, the belt transmission assembly or the coupling.
As shown in fig. 7, an aircraft blade applying the rotating shaft transmission structure provided in this embodiment further includes a blade 93 disposed at the head end of the rotating shaft, the blade 93 (such as a propeller or an aircraft engine blade) is fixedly or detachably mounted on the rotating shaft, at least two simplified sets of rotating shaft transmission structures are disposed on the rotating shaft 2, the rotating shaft transmission structures can replace a conventional high-speed bearing to support the rotating shaft, the rotating shaft transmission structure includes a hollow shaft sleeved on the rotating shaft, the rotating shaft drives the hollow shaft to rotate through the transmission assembly, the hollow shaft is connected with the rotating shaft through a bearing 4, the hollow shaft is connected with the housing through the bearing 4, so that the rotating shaft is rotatably disposed in the housing 94, the rotor engine 95 is disposed in the housing 94 and surrounds the rotating shaft, the rotating shaft 2 and the blade 93 rotate at a high speed under the driving of the rotor engine 95, the rotating shaft 2 drives the, the driving flap 211 on the rotating shaft drives the driven flap 221 on the hollow shaft to rotate through air flow, so that the rotating speed of a bearing between the rotating shaft and the hollow shaft is greatly reduced, and the bearing 4 in the rotating shaft transmission structure can be a common rolling bearing 4, so that the manufacturing cost is greatly saved. The aircraft blade that this embodiment provided can be applied to the production of unmanned aerial vehicle or large-scale passenger aircraft.
In another preferred embodiment, the shafts 2 and the N hollow shafts are driven synchronously by a second drive 5.
Preferably, referring to fig. 4, the second driving device 5 includes a second driving motor 51, a transmission shaft 52 in transmission connection with an output shaft of the second driving motor 51, and a plurality of sets of transmission assemblies 6; each hollow shaft and the rotating shaft 2 are connected with a transmission shaft 52 through a group of transmission components 6, and each transmission component 6 comprises a driving wheel 61 sleeved on the transmission shaft 52, a driven wheel 62 sleeved on the tail part of the corresponding hollow shaft/rotating shaft 2 and a transmission belt 63; the driving wheel 61 and the driven wheel 62 are in transmission connection through a transmission belt 63. Here, the driving pulley 61 and the driven pulley 62 are preferably synchronous pulleys, and the transmission belt 63 is preferably a synchronous belt, which has advantages of high transmission efficiency, smooth transmission, and no slip.
In order to ensure that the rotating speeds of the N hollow shafts and the rotating shaft 2 are sequentially increased, and the rotating speed of the rotating shaft 2 is the highest, the transmission ratios of the transmission assemblies 6 corresponding to the N hollow shafts and the rotating shaft 2 are sequentially decreased according to the sleeving sequence from outside to inside, the transmission ratios can be understood as the value of the rotating speed of the driving wheel 61 divided by the rotating speed of the driven wheel 62, and as the driving wheel 61 of each group of transmission assemblies 6 is arranged on the transmission shaft 52, the rotating speed of each driving wheel 61 is the same, the smaller the transmission ratio is, the higher the driven wheel 62 is, and the transmission ratios can be obtained by specifically adjusting the number.
Referring to fig. 4, the present invention provides an air compression device using the above-mentioned rotating shaft transmission structure, further including an air compression chamber 7 having an air inlet 72 and an air outlet 73, the cross-sectional area of the air compression chamber 7 gradually decreases from the air inlet 72 to the air outlet 73, the head ends of each of the hollow shafts and the rotating shafts 2 extend into the air compression chamber 7 from the air inlet 72 of the air compression chamber 7 and are connected with blades, each of the hollow shafts and the rotating shafts 2 includes a working section extending into the air compression chamber 7 and a transmission section disposed outside the air compression chamber 7, the lengths of the working sections of the N hollow shafts and the rotating shafts 2 sequentially increase and approach toward the air outlet 73 of the air compression chamber 7, and the head end of the rotating shaft 2 is closest to the air outlet 73 of the air compression chamber 7.
For convenience of explaining the working principle, in this embodiment, N is 2, the first hollow shaft 31 is the outermost hollow shaft, the fan blades on the first hollow shaft 31 are located at the air inlet 72 of the air compression chamber 7, the fan blades on the first hollow shaft 31 are defined as first fan blades 81, the fan blades on the second hollow shaft 32 are defined as second fan blades 82, and the fan blades on the rotating shaft 2 are defined as third fan blades 83; the area between the first fan blade 81 and the second fan blade 82 is defined as a first compression cavity 84, the area between the second fan blade 82 and the third fan blade 83 is defined as a second compression cavity 85, the area between the third fan blade 83 and the air outlet 73 of the air compression chamber 7 is defined as a third compression cavity 86, and as the cross-sectional area of the air compression chamber 7 is gradually reduced from the air inlet 72 to the air outlet 73, the volume of the first compression cavity 84 is larger than that of the second compression cavity 85, and the volume of the second compression cavity 85 is larger than that of the third compression cavity 86.
When the device works, the second driving device 5 drives the two hollow shafts and the rotating shaft 2 to synchronously rotate and the rotating speed is increased progressively, and if the rotating speed of the first hollow shaft 31 is 3600 r/min, the rotating speed of the second hollow shaft 32 is 7200 r/min, and the rotating speed of the rotating shaft 2 is 10800 r/min; air outside the air compression chamber 7 is sucked into the first compression cavity 84 through the first fan blades 81, the pressure at the second fan blades 82 is lower than the pressure at the first fan blades 81 due to the fact that the rotating speed of the second fan blades 82 is higher than that of the first fan blades 81, the air is pushed into the second compression cavity 85 to be compressed, then the pressure at the third fan blades 83 is lower than that of the second fan blades 82 due to the fact that the rotating speed of the third fan blades 83 is higher than that of the second fan blades 82, the air is pushed into the third compression cavity 86 to be further compressed, and finally the compressed air is discharged from the air outlet 73 of the air compression chamber 7.
Specifically, the air compression chamber 7 is in a truncated cone shape, the air inlet 72 and the air outlet 73 are respectively arranged at two ends of the air compression chamber 7, the diameter of the air inlet 72 is larger than that of the air outlet 73, that is, the air inlet 72 is arranged at a large-diameter end of the air compression chamber 7, and the air outlet 73 is arranged at a small-diameter end of the air compression chamber 7.
Furthermore, in order to enable each fan blade to be matched with the inner wall of the truncated cone-shaped air compression chamber 7, the diameters of the N hollow shafts and the fan blades on the rotating shaft 2 are sequentially reduced, and the diameter of the fan blade on the rotating shaft 2 is the smallest; the distance between the outer circumference of each fan blade and the inner wall of the air compression chamber 7 is equal; compact structure and good air flow convergence performance.
Preferably, the fan blade comprises a shaft sleeve and a plurality of blades fixed on the outer wall of the shaft sleeve. The shaft sleeves are sleeved on the corresponding hollow shafts and are fixedly connected with the hollow shafts (such as locked by locking screws). The arrangement is convenient for the detachable connection between the fan blade and the hollow shaft/rotating shaft 2, and the fan blade is convenient to replace even if damaged.
Referring to fig. 5, a fan using the above-mentioned rotating shaft transmission structure further includes a blade 91 disposed at the head end of the rotating shaft 2. The fan can select the above-mentioned drive mode, and the blade of this fan is fixed or detachably installs on pivot 2 to can rotate at a high speed along with pivot 2, form powerful amount of wind, because the bearing 4 of pivot transmission structure the inside chooses ordinary antifriction bearing 4 also can accomplish work smoothly for use, long service life uses the ordinary pressure lubricating oil can maintain, so low in manufacturing cost.
Referring to fig. 6, a cutting machine using the above-mentioned transmission structure of the rotating shaft further includes a cutting blade 92 disposed at the head end of the rotating shaft 2. The fan can select foretell drive mode in an alternative, and the cutting blade of this cutting machine is fixed or detachably installs on pivot 2 to can rotate at a high speed along with pivot 2, realize the cutting to the work piece, because the bearing 4 of pivot transmission structure the inside chooses ordinary antifriction bearing 4 also can accomplish work smoothly for use, long service life uses normal pressure lubricating oil to maintain, so low in manufacturing cost.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.
Claims (10)
1. A rotating shaft transmission structure is characterized by comprising a support, a rotating shaft and N hollow shafts, wherein the diameters of the N hollow shafts are sequentially reduced, the N hollow shafts are sequentially sleeved and can rotate relatively, and the rotating shaft penetrates through an inner hole of the hollow shaft at the innermost layer; the bearing is connected with the outmost hollow shaft, the hollow shafts are connected with the hollow shaft, the rotating shaft is connected with the innermost hollow shaft through the bearing, the outmost hollow shaft is the first hollow shaft, the rotating speeds of the N hollow shafts and the rotating shaft sequentially increase from outside to inside, and N is an integer greater than or equal to 1.
2. The spindle transmission according to claim 1, wherein both ends of the innermost hollow shaft are connected to the spindle through at least one bearing; two ends of the hollow shaft at the outermost layer are respectively connected with the support through at least one bearing; two ends of the hollow shaft at the outermost layer are respectively connected with the adjacent hollow shafts through at least one bearing.
3. The spindle drive of claim 1, wherein the spindle is driven by a first drive means, and the spindle drives the innermost hollow shaft to rotate by a drive assembly; the transmission assembly comprises a driving impeller sleeved on the rotating shaft and a driven impeller fixedly arranged on the innermost hollow shaft, and the driving impeller and the driven impeller are symmetrically arranged and drive the driven impeller to rotate through a fluid medium.
4. The spindle drive according to claim 1, wherein the spindles and the N hollow shafts are synchronously driven by a second drive.
5. The spindle transmission structure according to claim 4, wherein the second driving device includes a second driving motor, a transmission shaft in transmission connection with an output shaft of the second driving motor, and a plurality of sets of transmission components; each hollow shaft and each rotating shaft are connected with a transmission shaft through a group of transmission assemblies, each transmission assembly comprises a driving wheel sleeved on the transmission shaft, a driven wheel sleeved on the tail part of the corresponding hollow shaft/rotating shaft and a transmission belt; the driving wheel and the driven wheel are in transmission connection through a transmission belt, and the transmission ratios of the transmission assemblies corresponding to the N hollow shafts and the rotating shaft are sequentially decreased progressively according to the sleeving sequence from outside to inside.
6. The air compression device with the rotating shaft transmission structure is characterized by further comprising an air compression chamber, wherein the air compression chamber is provided with an air inlet and an air outlet which are communicated with each other, the cross section area of the air compression chamber is gradually reduced from the air inlet to the air outlet, the head end of each hollow shaft and the head end of each rotating shaft extend into the air compression chamber from the air inlet of the air compression chamber and are connected with fan blades, each hollow shaft and each rotating shaft respectively comprise a working section extending into the air compression chamber and a transmission section arranged outside the air compression chamber, the length of the working sections of the N hollow shafts and the rotating shafts is sequentially increased and is close to the direction of the air outlet of the air compression chamber, and the head end of the rotating shaft is closest to the air outlet of the air compression.
7. The air compression device as claimed in claim 6, wherein the air compression chamber is in the shape of a truncated cone, the air inlet and the air outlet are respectively arranged at two ends of the air compression chamber, and the diameter of the air inlet is larger than that of the air outlet; the diameters of the N hollow shafts and the blades on the rotating shaft are sequentially reduced, and the diameter of the blades on the rotating shaft is the minimum; the distance between the outer circumference of each fan blade and the inner wall of the air compression chamber is equal; the fan blade comprises a shaft sleeve and a plurality of blades fixed on the outer wall of the shaft sleeve.
8. An aircraft blade using the rotating shaft transmission structure as claimed in claim 3, further comprising a blade arranged at the head end of the rotating shaft.
9. A fan using the rotating shaft transmission structure of any one of claims 3 to 5, further comprising a blade disposed on the head end of the rotating shaft.
10. A cutting machine using the spindle drive structure according to any one of claims 3 to 5, further comprising a cutting blade provided on the head end of the spindle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020219928018 | 2020-09-11 | ||
| CN202021992801 | 2020-09-11 |
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| Publication Number | Publication Date |
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| CN112943679A true CN112943679A (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110097648.5A Pending CN112943679A (en) | 2020-09-11 | 2021-01-25 | Rotating shaft transmission structure, air compression device, fan, cutting machine and airplane blade |
Country Status (1)
| Country | Link |
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| CN (1) | CN112943679A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113832814A (en) * | 2021-10-22 | 2021-12-24 | 郑州东辰科技有限公司 | Sand spreading device for calibrating structural depth by sand spreading method |
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Application publication date: 20210611 |