CN205633018U - Screw propeller - Google Patents
Screw propeller Download PDFInfo
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- CN205633018U CN205633018U CN201620146847.5U CN201620146847U CN205633018U CN 205633018 U CN205633018 U CN 205633018U CN 201620146847 U CN201620146847 U CN 201620146847U CN 205633018 U CN205633018 U CN 205633018U
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Abstract
The utility model provides a there is a gin pole at the center of screw propeller, at the base. The two sets of reducing pitch -changing mechanism and the two sets of lazytongss are located the base of propeller hub respectively, and wherein the one end of dead axle is connected with the extension spring's that is located the horizontal hole on the gin pole both ends respectively among each reducing pitch -changing mechanism. Each dead axle other end links firmly with the connecting axle respectively. The other end of each connecting axle is located each moving axis respectively. The other end of each moving axis is connected with each paddle root respectively. Two paddles symmetry install the both ends at the propeller hub. Two ball sleeve respectively the suit on each paddle root and the paddle between to form the translation vice. The utility model discloses the induced draft fan is in the self -driven principle of centrifugal force, complete realization change oar footpath feather, will become the positive effect maximize that the oar produced, use the ingenious rotation that prevents the displacement of decoupling zero function simultaneously and produce the extension spring pulling force and disturb, realized simultaneously moving with the feather in screw propeller's change oar footpath. The utility model has the characteristics of and simple structure, light in weight.
Description
Technical field
The present invention relates to a kind of aircraft propulsion variant propeller mechanism, a kind of change oar footpath based on blade centrifugal force feather propeller mechanism.
Background technology
Because the atmospheric density in 20-30km high-altitude is the 1/14-1/70 on sea level, propeller load operating mode excursion when high-altitude and low latitude is the biggest, electric system is difficult to keep total power to mate with propeller load in the operating mode of wide variation, there is the dynamical system poor-performing when low latitude according to high altitude environment design, according to dynamical system phenomenon of poor performance when high-altitude of low latitude Environment Design.The reason causing this present situation is the propeller that propulsion system all uses that blade is fixed, under peak torque limits, the high-altitude maximum (top) speed of propeller is 3-8 times of sea level maximum (top) speed, causes propulsion system low latitude thrust the least, the power wretched insufficiency when low altitude flight.
Feather and change oar footpath propeller propulsion system are the technological approaches of a kind of good this problem of solution, use little oar footpath and little pitch, use big oar footpath and big pitch during high-altitude, at utmost absorb power of motor, increase thrust during low latitude.Feather Propeller technology develops comparative maturity in helicopter field, but such as aerostatics research field, tilting rotor research field, wind power generation field etc. are due to the restriction of range of travel in some field, propeller cannot be allowed all to reach higher efficiency under different mode of operations only by the pitch changing propeller.Use variable oar footpath propeller simultaneously can extend the range of accommodation of propeller in these research fields, improve propeller efficiency.
Northwestern Polytechnical University proposes a kind of change oar footpath pitch propeller being applied to aircraft in the national defence innovation and creation of Application No. 201418000448.4, displacement motor transfers torque to propeller shank by bevel gear system and realizes displacement, rotation is converted to translation by rack and pinion steering gear by reducing motor, is achieved in the reducing motion of blade.This mechanism provides the benefit that displacement motion and the reducing motion being simultaneously achieved propeller, and is accurately controlled, and however it is necessary that increase servo control system, and the weight cost paid for this is the biggest.
Northwestern Polytechnical University proposes a kind of propeller that can become oar footpath in the innovation and creation of Application No. 2015102062859.These innovation and creation are to be centrifuged power-actuated diameter-variable propeller mechanism based on blade self, in rotary course, the centrifugal force size of foundation blade self controls the oar footpath size of propeller, overcome active variable oar footpath propeller and compensate the shortcoming that weight is the biggest, but this mechanism can only become oar footpath, it is impossible to realize becoming oar footpath and feather to reach more preferable using effect simultaneously.
Summary of the invention
Can not realize present in prior art becoming oar footpath and the deficiency of feather for overcoming, the present invention proposes a kind of propeller simultaneously.
The present invention includes that a pair blade, propeller hub, gin pole, two set reducing pitch-changing mechanisms and two overlap lazy-tongs.Described propeller hub is described reducing pitch-changing mechanism and the carrier of lazy-tongs, including upper cover and base, has gin pole at the center of base.Described two set reducing pitch-changing mechanisms and two set lazy-tongs lay respectively in the base of propeller hub, and wherein, one end of the dead axle in two set reducing pitch-changing mechanisms is connected with the two ends stretching spring in the lateral aperture on centrally located column respectively.The end face of described each dead axle other end is connected with connecting shaft respectively.The other end of described each connecting shaft lays respectively in each moving axis.The other end of described each moving axis is connected with each propeller shank respectively.Two blades are symmetrically installed on the two ends of described propeller hub.Two ball sleeves are set on a propeller shank and are positioned at one end of this blade.
The outer ring of described ball sleeve is connected by jump ring and propeller hub are fixing, and the inner ring of this ball sleeve is enclosed within propeller shank, makes to form translation between described ball sleeve and blade secondary.
The circumferential surface of described each propeller shank has helicla flute；This spiral fluted anglec of rotation is identical with the feather angle of propeller, to realize the feather motion of propeller.
Circumferential surface at described each dead axle all has the limited block of radially protruding；Circumferential surface at the dead axle symmetrical with this limited block all has the shoulder hole for installing the limit spring decorative pearl on top of an official cap.The described limit spring decorative pearl on top of an official cap coordinates with the limited impression of bedplate upper surface, to realize the restriction to described dead axle position.What circumferential surface at described dead axle was also symmetrical is distributed a pair for the auricle fixing lazy-tongs；Angle between the pair of auricle and described limited block and the limit spring decorative pearl on top of an official cap is 90 degree.On described auricle, distribution is fixed with the slide block coordinated with guide rail.
Described gin pole is positioned at the groove at base center；Have in the both sides of this groove and have bedplate respectively, each bedplate has pair of guide rails respectively；It is evenly equipped with limited impression between each pair of guide rail.The bearing pin for installing pulley is had respectively in the outer end of described both sides bedplate.
Described lazy-tongs have two sets.Laying respectively on the bedplate of groove both sides, wherein, one end of the rope in the lazy-tongs of side is held within the auricle of the same side, and the other end walks around the pulley being positioned at this wing base plate outer end, and is held within the auricle of the dead axle on opposite side bedplate；Equally, one end of the rope in opposite side lazy-tongs is held within the auricle of this side, and the other end walks around the pulley being positioned at this wing base plate outer end, and is held within the auricle to the dead axle on the bedplate of side.Two described ropes are isometric.
Two thrust ball bearings are included respectively in described reducing pitch-changing mechanism.Two described thrust ball bearings are sleeved in the connecting shaft of this end, and are positioned at the inner of this connecting shaft.It is respectively installed with baffle plate in the outer end of connecting shaft, and makes to be slidably matched between this baffle plate and connecting shaft.It is respectively installed with spring in the outer end of each connecting shaft, and makes the inner face of this spring fit with described baffle plate.Described thrust ball bearing, baffle plate and spring are positioned at each moving axis respectively.
The present invention is that one utilizes propeller blade centrifugal force to change, it is automatically obtained diameter of propeller blade increase or reduce the mechanism that simultaneously can be automatically obtained again airscrewpiston regulation, utilize propeller blade centrifugal force to change, be automatically obtained diameter of propeller blade and increase or reduce the regulation that simultaneously can be automatically obtained again airscrewpiston.
In the present invention, gin pole is positioned at propeller hub center, is fixed with spring in it, and the two ends of spring are connected with dead axle respectively, and the auricle of dead axle is connected by bolt with slide block, and slide block can be along the slide being fixed on propeller hub bedplate.The end face of the dead axle other end is connected with connecting shaft, and the other end of connecting shaft is positioned at moving axis.The moving axis other end is threaded by female thread propeller shank.Opposite side at propeller shank is cased with ball sleeve, and ball sleeve outer ring is fixed with propeller hub by parts such as jump rings.The pulley of lazy-tongs is fixed on base, the auricle that pulley walked around by rope and two ends are separately fixed on dead axle.Limited impression is symmetrically distributed on propeller hub, and the limit spring decorative pearl on top of an official cap is arranged on dead axle, and the limit spring decorative pearl on top of an official cap and limited impression cooperate the position limiting blade in propeller hub.Secondary by being sleeved between the ball sleeve of propeller shank and blade formation translation.The pulley of rope lazy-tongs is fixed on base, and rope is wound around with pulley, and the auricle that rope ends is stretched out with both sides displacement decoupling mechanism respectively is connected.
In work, when propeller is static, under stretching initial tension of spring effect, propeller is in little oar footpath and little pitch state, along with rotating speed is gradually increased, the centrifugal force acted on blade is gradually increased, when centrifugal force is more than stretching initial tension of spring and inner side limiting-position draw-in groove and when making a concerted effort of limit spring decorative pearl on top of an official cap active force, reducing pitch-changing mechanism moves along propeller radial direction with blade, until the limit spring decorative pearl on top of an official cap snaps in the spacing draw-in groove in outside, dead axle keeps translation along guide rail in this process, propeller shank is under ball sleeve and spiral fluted act on jointly, along propeller radially translation, simultaneously along own axis.It is achieved in propeller and becomes big oar footpath big pitch state from little oar footpath little pitch state.When rotating speed declines, stretching spring tension overcomes blade centrifugal force to make a concerted effort with limit spring decorative pearl on top of an official cap active force with the spacing draw-in groove in outside, the limit spring decorative pearl on top of an official cap is made to slide in inner side limiting-position draw-in groove, it is achieved propeller becomes little oar footpath little pitch state from big oar footpath big pitch state.
The present invention achieves following beneficial effect:
1, application decoupling function prevents the rotation of displacement from stretching spring tension producing interference cleverly, and is simultaneously achieved change oar footpath and the feather motion of propeller.
2, blade pitch device based on the design of blade centrifugal force, simple in construction, decrease servomotor and controller than general active control mechanism, alleviate the weight of mechanism.
3, one side realizes becoming oar footpath and feather the most simultaneously, and another aspect applies self-driven principle based on centrifugal force, did not increase the most complete the achieving of weight and becomes oar footpath feather, and the combination of the two will become the good effect maximization that oar produces.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the partial enlarged drawing of Fig. 1；
Fig. 3 is the B-B sectional view of Fig. 2；
Fig. 4 is propeller hub superstructure schematic diagram, wherein: Fig. 4 a is upper cover front view, and Fig. 4 b is upper cover left view, and Fig. 4 c is upper cover top view；
Fig. 5 is propeller hub base and gin pole structural representation, and wherein Fig. 5 a is front view, and Fig. 5 b is left view, and Fig. 5 c is top view, and Fig. 5 d is the sectional view of aminoacyl site in Fig. 5 a；
Fig. 6 is paddle blade structure schematic diagram；
Fig. 7 is limit spring decorative pearl on top of an official cap schematic diagram；
Fig. 8 is the structural representation of dead axle, and wherein Fig. 8 a is front view, and Fig. 8 b is left view, and Fig. 8 c is top view；
Fig. 9 is the connection diagram of moving axis, dead axle；
Figure 10 is the scheme of installation of lazy-tongs.In figure:
1. blade；2. upper cover；3. base；4. limit sliding chutes；5. gin pole；6. limited impression；7. propeller shank；8. blade shank；9. helicla flute；10. rope；11. pulleys；12. auricles；13. slide blocks；14. guide rails；15. ball sleeves；16. stretching springs；17. dead axles；18. connecting shafts；19. moving axis；The 20. limit spring decorative pearls on top of an official cap；21. limited blocks；22. baffle plates；23. thrust ball bearings；24. springs；25 bedplates.
Detailed description of the invention
The present embodiment is a kind of propeller that can become oar footpath pitch, overlaps lazy-tongs including a pair blade 1, propeller hub, gin pole 5, two set reducing pitch-changing mechanism and two.The described propeller that can become oar footpath pitch is symmetrical structure.
Described propeller hub is described reducing pitch-changing mechanism and the carrier of lazy-tongs, is bolted is formed by upper cover 2 and base 3.The center of described base 3 is circular groove, and there is the gin pole 5 protruding this base inner surface at the center in this groove.At the bedplate 25 having symmetry of the both sides of groove, each both sides bedplate there is pair of guide rails 14 respectively；Limited impression 6 it is evenly equipped with between each pair of guide rail.The bearing pin for installing pulley 11 is had respectively in the outer end of described both sides bedplate 25.Two blades 1 are symmetrically installed on the two ends of described propeller hub.
Described two set reducing pitch-changing mechanisms and two set lazy-tongs lay respectively in the base 3 of propeller hub, and wherein, one end of the dead axle 17 in two set reducing pitch-changing mechanisms is connected with the two ends stretching spring 16 in the lateral aperture on centrally located column 5 respectively.The end face of described each dead axle other end is connected with connecting shaft 18 respectively.The other end of described each connecting shaft 18 lays respectively in each moving axis 19.The other end of described each moving axis 19 is threadeded with each propeller shank 7 respectively by female thread.Described each propeller shank 7 is circular rod-shaped, and the circumferential surface at each propeller shank has helicla flute；This spiral fluted anglec of rotation is identical with the feather angle of propeller, to realize the feather motion of propeller.Two ball sleeves 15 are set on a propeller shank and are positioned at one end of this blade 1, and the outer ring of this ball sleeve is connected by jump ring and propeller hub are fixing, and the inner ring of this ball sleeve is enclosed within propeller shank 7, make to form translation between described ball sleeve and blade secondary.Circumferential surface at described each dead axle all has the limited block 21 of radially protruding；The shoulder hole for installing the limit spring decorative pearl on top of an official cap 20 is all had at the circumferential surface with the dead axle of this limited block 21 symmetry.The described limit spring decorative pearl on top of an official cap 20 coordinates with the limited impression 6 of bedplate 25 upper surface, to realize the restriction to described dead axle position.
Described limited block 21 coordinates with the limit sliding chutes 4 of upper cover 2 inner surface of propeller hub, to prevent blade abjection or excess shrinkage.The described limit spring decorative pearl on top of an official cap 20 and the circumferential surface being distributed in described dead axle of limited block 21 symmetry.What circumferential surface at described dead axle was also symmetrical is distributed a pair for the auricle 12 fixing lazy-tongs；Angle between the pair of auricle 12 and described limited block 21 and the limit spring decorative pearl on top of an official cap 20 is 90 degree.On described auricle 12, distribution is fixed with the slide block 13 coordinated with guide rail.
Described lazy-tongs have two sets.Lay respectively on the bedplate of both sides, wherein, one end of rope 10 in the lazy-tongs of side is held within the auricle 12 of the same side, and the other end walks around the pulley 11 being positioned at this wing base plate 25 outer end, and is held within the auricle of the dead axle on opposite side bedplate；Equally, one end of the rope 10 in opposite side lazy-tongs is held within the auricle 12 of this side, and the other end walks around the pulley 11 being positioned at this wing base plate 25 outer end, and is held within the auricle to the dead axle on the bedplate of side.Two described ropes are isometric.When the dead axle being positioned on the bedplate of side moves to the blade direction of homonymy, the rope being fixed on this dead axle is fixed on dead axle on opposite side bedplate by pulley driving and moves to the blade direction of this dead axle side；In like manner, when on opposite side bedplate, dead axle moves to the blade direction of homonymy, the rope being fixed on this dead axle is fixed on by pulley driving and moves dead axle on bedplate to the blade direction of this dead axle side.Being synchronized with the movement of both sides blade is realized by described lazy-tongs.
Two thrust ball bearings 23 are included respectively in the reducing pitch-changing mechanism at two ends.Two described thrust ball bearings are sleeved in the connecting shaft 18 of this end, and are positioned at the inner of this connecting shaft.It is respectively installed with baffle plate 22 in the outer end of connecting shaft, and makes to be slidably matched between this baffle plate and connecting shaft.It is respectively installed with spring 24 in the outer end of each connecting shaft 18, and makes the inner face of this spring fit with described baffle plate 22.Described thrust ball bearing 23, baffle plate 22 and spring 24 are positioned at each moving axis respectively.
The described limit spring decorative pearl on top of an official cap is made up of the decorative pearl on top of an official cap and spring.During installation, place the spring in described in the shoulder hole installing the limit spring decorative pearl on top of an official cap, then one end of the decorative pearl on top of an official cap is loaded this shoulder hole, and fit with described spring, enable this decorative pearl on top of an official cap to this ladder contract when by External Force Acting.
Pass through the present embodiment, it is possible to realize blade oar footpath pitch from minimum to maximum change:
During minimum oar footpath pitch:
Time static, spacing spring top bead 20 snaps among the limited impression 6 of inner side.When the rotating speed of propeller starts to increase, the centrifugal force that blade produces causes having between the limited impression 6 of the limit spring decorative pearl on top of an official cap 20 and inner side mutual effect, and then the compression limit spring decorative pearl on top of an official cap 20.When revolution speed of propeller is less than certain threshold values, the limit spring decorative pearl on top of an official cap 20 is not compressed to the shortest, cannot eject from the limited impression 6 of inner side yet, therefore blade keeps little oar footpath little pitch state.
When oar footpath pitch becomes big:
When the rotating speed of propeller reaches certain threshold values, blade centrifugal force is made a concerted effort more than stretching initial tension of spring and limited impression 6 and limit spring decorative pearl on top of an official cap active force, the limit spring decorative pearl on top of an official cap 20 is compressed into the shortest and limited impression 6 from inner side and ejects, reducing pitch-changing mechanism moves along propeller radial direction with blade, until the limit spring decorative pearl on top of an official cap 20 snaps in the limited impression in outside, dead axle 17 keeps translation along guide rail 14 in this process, propeller shank 7 is under the common effect of ball sleeve 15 and helicla flute 9, not only along propeller radially translation and along own axis.It is achieved in propeller and becomes big oar footpath big pitch state from little oar footpath little pitch state.
During maximum oar footpath pitch:
After completing to become big oar footpath big pitch state, blade gets rid of to the big pitch position in big oar footpath, and the limit spring decorative pearl on top of an official cap 20 snaps in the limited impression in outside, and now blade keeps big oar footpath big pitch state.Now stopper slot 4 limits limited block 21 moving along direction, propeller oar footpath, and before failure mechanisms, no matter how centrifugal force increases diameter of propeller blade also will not become big.
When oar footpath pitch diminishes:
When the rotating speed of propeller is reduced to certain threshold values, the limit spring decorative pearl on top of an official cap 20 is compressed to the shortest, and eject from the limited impression in outside, stretching spring tension overcomes making a concerted effort of blade centrifugal force and outside limited impression and limit spring decorative pearl on top of an official cap active force, and blade shrinks along the direction of guide rail 14.Any one in two blades has oar footpath all another can be driven to produce identical movement tendency by rope lazy-tongs with the trend that pitch changes, until mechanism just starts reducing and displacement when another blade reaches reducing displacement condition.The limit spring decorative pearl on top of an official cap 20 snaps in the limited impression of inner side, and blade recovers to little oar footpath little pitch state.
Claims (7)
1. a propeller, it is characterised in that include that a pair blade, propeller hub, gin pole, two set reducing pitch-changing mechanisms and two overlap lazy-tongs；Described propeller hub is described reducing pitch-changing mechanism and the carrier of lazy-tongs, including upper cover and base, has gin pole at the center of base；Described two set reducing pitch-changing mechanisms and two set lazy-tongs lay respectively in the base of propeller hub, and wherein, one end of the dead axle in two set reducing pitch-changing mechanisms is connected with the two ends stretching spring in the lateral aperture on centrally located column respectively；The end face of described each dead axle other end is connected with connecting shaft respectively；The other end of described each connecting shaft lays respectively in each moving axis；The other end of described each moving axis is connected with each propeller shank respectively；Two blades are symmetrically installed on the two ends of described propeller hub；Two ball sleeves are set on a propeller shank and are positioned at one end of this blade.
2. propeller as claimed in claim 1, it is characterised in that the outer ring of described ball sleeve is connected by jump ring and propeller hub are fixing, and the inner ring of this ball sleeve is enclosed within propeller shank, makes to form translation between described ball sleeve and blade secondary.
3. propeller as claimed in claim 1, it is characterised in that the circumferential surface of described each propeller shank has helicla flute；This spiral fluted anglec of rotation is identical with the feather angle of propeller, to realize the feather motion of propeller.
4. propeller as claimed in claim 1, it is characterised in that the circumferential surface at described each dead axle all has the limited block of radially protruding；Circumferential surface at the dead axle symmetrical with this limited block all has the shoulder hole for installing the limit spring decorative pearl on top of an official cap；The described limit spring decorative pearl on top of an official cap coordinates with the limited impression of bedplate upper surface, to realize the restriction to described dead axle position；What circumferential surface at described dead axle was also symmetrical is distributed a pair for the auricle fixing lazy-tongs；Angle between the pair of auricle and described limited block and the limit spring decorative pearl on top of an official cap is 90 degree；On described auricle, distribution is fixed with the slide block coordinated with guide rail.
5. propeller as claimed in claim 1, it is characterised in that described gin pole is positioned at the groove at base center；There is bedplate respectively in the both sides of this groove, each bedplate has pair of guide rails respectively；It is evenly equipped with limited impression between each pair of guide rail；The bearing pin for installing pulley is had respectively in the outer end of described both sides bedplate.
6. propeller as claimed in claim 1, it is characterised in that described lazy-tongs have two sets；Laying respectively on the bedplate of groove both sides, wherein, one end of the rope in the lazy-tongs of side is held within the auricle of the same side, and the other end walks around the pulley being positioned at this wing base plate outer end, and is held within the auricle of the dead axle on opposite side bedplate；Equally, one end of the rope in opposite side lazy-tongs is held within the auricle of this side, and the other end walks around the pulley being positioned at this wing base plate outer end, and is held within the auricle to the dead axle on the bedplate of side；Two described ropes are isometric.
7. propeller as claimed in claim 1, it is characterised in that include two thrust ball bearings in described reducing pitch-changing mechanism respectively；Two described thrust ball bearings are sleeved in the connecting shaft of this end, and are positioned at the inner of this connecting shaft；It is respectively installed with baffle plate in the outer end of connecting shaft, and makes to be slidably matched between this baffle plate and connecting shaft；It is respectively installed with spring in the outer end of each connecting shaft, and makes the inner face of this spring fit with described baffle plate；Described thrust ball bearing, baffle plate and spring are positioned at each moving axis respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620146847.5U CN205633018U (en) | 2016-02-26 | 2016-02-26 | Screw propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620146847.5U CN205633018U (en) | 2016-02-26 | 2016-02-26 | Screw propeller |
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| Publication Number | Publication Date |
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| CN205633018U true CN205633018U (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620146847.5U Active CN205633018U (en) | 2016-02-26 | 2016-02-26 | Screw propeller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105620728A (en) * | 2016-02-26 | 2016-06-01 | 西北工业大学 | Propeller with variable propeller diameter and variable propeller pitch |
| CN107472514A (en) * | 2017-09-20 | 2017-12-15 | 上海歌尔泰克机器人有限公司 | Variable-pitch propeller and unmanned plane |
| CN110254694A (en) * | 2019-07-25 | 2019-09-20 | 埃游科技（深圳）有限公司 | A kind of propeller automatic torque-changing mechanism |
-
2016
- 2016-02-26 CN CN201620146847.5U patent/CN205633018U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105620728A (en) * | 2016-02-26 | 2016-06-01 | 西北工业大学 | Propeller with variable propeller diameter and variable propeller pitch |
| CN105620728B (en) * | 2016-02-26 | 2017-08-11 | 西北工业大学 | It is a kind of to become the propeller of oar footpath pitch |
| CN107472514A (en) * | 2017-09-20 | 2017-12-15 | 上海歌尔泰克机器人有限公司 | Variable-pitch propeller and unmanned plane |
| CN107472514B (en) * | 2017-09-20 | 2024-03-08 | 上海歌尔泰克机器人有限公司 | Variable pitch propeller and unmanned aerial vehicle |
| CN110254694A (en) * | 2019-07-25 | 2019-09-20 | 埃游科技（深圳）有限公司 | A kind of propeller automatic torque-changing mechanism |
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