KR20190075289A - Propeller varied the pitch of blade and the radius of gvration - Google Patents

Abstract

According to one embodiment of the present invention, a propeller in which a pitch and a rotation radius of a blade are variable includes: a hub; and a plurality of blades which are installed on the hub through a rotation member and in which a blade tip is rotated in a vertical direction. An axis of the rotation member is provided to deviate from a tangential direction of a rotation direction of the blade, so that the pitch and the rotation radius of the blade can be changed at the same time.

Description

PROPELLER VARIED THE PITCH OF BLADE AND THE RADIUS OF GVRATION < RTI ID = 0.0 >

A propeller is disclosed wherein the pitch and radius of rotation of the blades are variable. Specifically, a propeller is disclosed in which the pitch and the turning radius of the blades are variable, which can turn the blades downward in accordance with the driving mode to vary the pitch and the turning radius of the blades.

A propeller is a mechanism that generates thrust or lift through the rotation of a motor or a plurality of blades connected to the central axis of the engine, and is used for the flight and movement of airplanes, ships, and special types of vehicles.

The basic shape of such a propeller is a fixed propeller in which the blade is disposed radially from the central axis and fixed to the central shaft, and a variable pitch propeller is used to adjust the blade pitch in the form of a fixed propeller.

In general, the fixed propeller is advantageous in that the structure is simple and the manufacturing cost is economical. The variable pitch propeller is a propeller capable of freely adjusting the angle of the feather, that is, the pitch, And thus, the performance of the airplane can be improved. In particular, a variable pitch propeller can improve the efficiency by reducing the pitch of the propeller when the take-off speed is slow and increasing the pitch of the propeller when cruising or flying at high speed.

Such a variable pitch propeller is disclosed in Korean Patent Registration No. 10-1675250 entitled " Variable pitch type unmanned aerial vehicle ".

An object according to an embodiment is to provide a propeller in which the pitch and the turning radius of the blade are variable, which can improve the efficiency by varying the shape of the propeller in accordance with the drive mode.

Another object of the present invention is to provide a propeller in which the pitch of the blades and the turning radius are variable, which can simultaneously change the pitch of the blades and the turning radius of the blades.

Another object of the present invention is to provide a propeller in which the pitch and the turning radius of the blade are variable, which can be implemented with a simple structure and a low cost.

According to an aspect of the present invention, there is provided a propeller having a pitch and a turning radius varying in accordance with an exemplary embodiment of the present invention may include a plurality of blades mounted on the hub through a hub and a rotating member, And the axis of the rotating member is disposed so as to be shifted from the tangential direction of the rotating direction of the blade so that the pitch and the turning radius can be simultaneously changed in conjunction with the turning of the blade.

Further, according to an embodiment of the present invention, a propeller having a variable pitch and a turning radius may further include an adjustment unit that is raised and lowered on the hub, and the plurality of blades are disposed in a direction opposite to the blade tip And an engaging member that extends beyond the rotating member and is disposed on the adjusting unit. The engaging member and the plurality of blades are brought into contact with each other. By the raising and lowering of the adjusting unit, And the tips of the blades can be pivoted upward or downward according to the rising and falling of the latching member.

In order to achieve the above object, according to an embodiment of the present invention, there is provided a propeller in which a pitch and a turning radius of a blade are variable, the propeller may further include a control unit for controlling the upward and downward movement of the adjustment unit, And a thrust increasing mode in which the blades are not folded by lowering the adjusting unit. In the thrust increasing mode, the blades are horizontally disposed to increase the total turning radius of the blades, The pitch of the blades can be reduced and in the speed increasing mode an angle is formed between the blades so that the total turning radius of the blades is reduced and the pitch of the blades is increased, have.

According to another aspect of the present invention, there is provided a propeller having a hub rotatable about its axis, the hub having a pitch and a turning radius varying in accordance with an embodiment of the present invention, The angle can be adjusted.

According to another aspect of the present invention, there is provided a hub of a propeller in which a pitch and a turning radius of a blade are variable, the hub being connected to the center element, A connecting element for relatively rotating one side of the center element and a connecting element for connecting the other side of the centering element to the other side of the blade fixing table and expanding and contracting, The axis angle of the rotating member with respect to the central element can be varied.

According to another aspect of the present invention, there is provided a propeller for a turbine, the propeller having a pitch and a turning radius varying according to an embodiment of the present invention includes an adjustment shaft passing through a center of the hub, So that the latching member can be pivoted.

According to another aspect of the present invention, there is provided a propeller having a blade pitch and a turning radius, wherein the rotating member is tilted in an up-and-down direction of the hub, The amount of change in the pitch of the blade can be increased.

According to the propeller in which the pitch and the turning radius of the blades are variable according to the embodiment, the shape of the propeller can be changed according to the driving mode to improve the efficiency.

Further, according to the propeller in which the pitch and the turning radius of the blade are variable according to the embodiment, the pitch of the blades and the turning radius of the blades can be changed at the same time.

In addition, according to one embodiment, the pitch and the turning radius of the blades can be varied, and the pitch and the turning radius of the blades can be varied with a simple structure and a low cost.

FIG. 1A is a plan view of a propeller in which the pitch and radius of rotation of a blade are variable according to one embodiment. FIG.
1B is a side view of a propeller in which the pitch and radius of rotation of the blades are variable according to one embodiment.
2 is a plan view of a propeller in which the blade fixing connection angle is changed such that the pitch and the turning radius of the blade are changed according to an embodiment.
FIG. 3A is a plan view of the hub shown in FIGS. 1A and 1B. FIG.
3B is a plan view of the hub shown in FIG.
4A shows a state in which the expansion and contraction elements of the propeller in which the pitch and the turning radius of the blade are varied according to the embodiment are shown.
Fig. 4B shows a state in which the expansion and contraction elements of the propeller vary in pitch and radius of rotation of the blades according to an embodiment.
FIG. 5A is a side view showing a variation of a blade and an adjustment portion of a propeller in which the pitch and the turning radius of the blade are variable according to an embodiment. FIG.
5B is a cross-sectional view showing a variation of a blade of a propeller in which a pitch and a turning radius of the blade are varied according to an embodiment.
FIG. 5C is a plan view showing a change in the blade of the propeller in which the pitch and the turning radius of the blade are varied according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments, detailed description of known functions and configurations incorporated herein will be omitted when it may make the best of an understanding clear.

In describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

FIG. 1 is a plan view and a side view of a propeller 100 in which a pitch and a turning radius of a blade 120 according to an embodiment are variable, and FIG. 2 is a cross-sectional view of a blade 120 according to an embodiment, 3 is a plan view of the hub 110 of the propeller 100 in which the pitch and radius of rotation of the blade 120 according to one embodiment are variable .

1A is a plan view of a propeller 100 in which a pitch and a turning radius of a blade 120 according to an embodiment are variable, and FIG. 1B is a view showing a pitch and a turning radius of the blade 120 according to an embodiment, FIG. 3A is a plan view of the hub 110 shown in FIGS. 1A and 1B, and FIG. 3B is a plan view of the hub 110 shown in FIG. 2. FIG.

1A through 3B, a propeller 100 in which a pitch and a turning radius of a blade 120 according to an embodiment are variable may include a hub 110, a blade 120, and an adjustment unit 130 .

The hub 110 may be connected to a shaft of a motor or an engine provided in a ship or a flying object, and may be rotated together with the rotation of the shaft of the motor or the engine. The hub 120 and the blade 120 are connected so that the blade 120 can be pivoted around the center of the hub 110 as the hub 110 rotates and the blade 120 is rotated or lifted Can be generated.

The hub 110 may include an angle adjusting member 112 and a rotating member 114 and the shaft of the rotating member 114 may be rotated in the direction of rotation defined by the rotation of the hub 110 with reference to Figures 4A and 4B, As shown in Fig. The angle between the axis of the rotating member 114 and the tangential direction of the rotating direction may be fixed with reference to Figs. 1A, 1B and 3A, and may be varied with reference to Figs. 2 and 3B. The angle between the axis of the rotating member 114 and the tangential direction of the rotating direction will be described in more detail below with reference to Figs. 4A and 4B.

A plurality of blades 120 may be provided, and a plurality of blades 120 may be radially arranged around the hub 110. The plurality of blades 120 are moved past the rotary member 114 in the direction opposite to the blade tip 122 (the end portion of the blade collar) (the direction from the blade tip 122 to the hub 110) As shown in FIG. The plurality of blades 120 may be pivoted about the rotary member 114 so that the blade tip 122 selectively faces the hub 110 in the up-down direction. That is, the blade 120 can be folded downward with respect to the hub 110. The pitch and the radius of rotation of the propeller 100 can be changed at the same time in conjunction with the folding of the blade 120.

The adjusting unit 130 may be in contact with the engaging member 124 of the plurality of blades 120 and may be moved up and down on the hub 110. [

Specifically, the adjustment section 130 may include an adjustment shaft 132 passing through the hub 110, and the adjustment shaft 132 may be formed to penetrate the center of the hub 110. One end of the adjustment shaft 132 is located at the bottom of the hub 110 and can be lifted up and down by an engine, motor, or other means. The other end of the adjustment shaft 132 may extend in the upper direction of the hub 110. The adjustment unit 130 may be disposed at the other end of the adjustment shaft 132 that is positioned in the upper direction.

The engaging member 124 of the blade 120 extending beyond the rotating member 114 can be arranged to be in contact with the adjusting unit 130 on the adjusting unit 130 and can be moved to the adjusting unit 130 130 can be raised and lowered with respect to the hub 110. That is, the adjustment unit 130 can pivot the locking member 124 up and down with the rotary member as the axis moves up and down according to the upward and downward movement of the adjusting shaft 132, The blade tip 122 is pivoted downward when the latch member 124 is pivoted upward relative to the hub 110 and the blade tip 122 is pivoted upward when the latch member 124 is pivoted downward ). ≪ / RTI > This will be described in more detail below with reference to FIG. 5A.

The engaging member 124 may be formed in a convex shape in an upward direction with reference to Fig. Therefore, the lower surface of the engaging member 124 can also be formed to bend (concave) upward.

Specifically, when the propeller 100 is rotated, the blade 120 may receive a centrifugal force. 5A, when the adjusting unit 130 is raised in the upward direction to pivot the engaging member 124 in the upward direction and the blade 120 is moved in the downward direction, the shape of the blade 120 is maintained The blade 120 is held in a folded state with respect to the hub 110. However, when the adjustment portion 130 is lowered in the downward direction, the blades 120 are adjusted to a horizontal state (unfolded state) by centrifugal force .

When the blade tip 122 is pivoted downward and the latching member 124 is pivoted upwardly and the adjustment portion 130 is lifted upward, the lower surface of the latching member 124 contacts the upper surface of the adjustment portion 130 So that the force due to the centrifugal force of the blade 120 attached to the adjustment unit 130 can be dispersed and transmitted on the adjustment unit 130.

Therefore, when the blade 120 is rotated horizontally and the adjustment member 130 is raised, the bent tip 122 is rotated in the downward direction. 130 and the engaging member 124 can be increased and the position of the blade 120 can be stably fixed.

4 illustrates a variation of the hub 110 of the propeller 100 with varying pitch and radius of rotation of the blade 120 according to one embodiment.

More specifically, FIG. 4A illustrates a state in which the expansion and contraction elements 1128 of the propeller 100 are varied in pitch and turning radius of the blade 120 according to one embodiment, and FIG. 4B is a cross- The expansion and contraction element 1128 of the propeller 100, in which the pitch and the turning radius of the blade 120 are variable, is elongated.

4A and 4B, a hub 110 of a propeller 110 having a pitch and a turning radius of a blade 120 according to an embodiment is rotatable about the axis of the rotating member 114 and the rotation of the blade 120 And the angle adjustment member 112 may include a central element 1122, a blade fixture 1124, a connecting element 1126, and a telescopic element (not shown) 1128).

The center element 1122 may be provided with a through hole through which the adjustment shaft 132 of the adjustment part 130 passes, and the adjustment part 130 may be installed.

A plurality of blade fixing rods 1124 may be disposed on the symmetrical side of the center element 1122 and a rotating member 114 may be provided on the blade fixing rods 1124 to allow axial rotation of the blades 120.

The coupling element 1126 can couple the blade fixture 1124 and the center element 1122 such that the blade fixture 1124 is pivoted horizontally relative to the center element 1122. [

Likewise, the telescopic element 1128 can couple the blade fixture 1124 and the central element 1122. This stretching element 1128 may be a linear motor.

Referring to Figs. 4A and 4B, for example, the blade mount 1124 can be moved coplanar with the central element 1122. Fig. The central element 1122 may be provided with a telescopic element 1128 and a connecting element 1126.

The elastic element 1128 at one side of the blade fixture 1124 can be pivotably disposed relative to the blade fixture 1124 and the elastic component 1128 is pivotally connected to one side of the center element 1122 , The blade fixing base 1124 and the center element 1122 can be connected. A connecting element 1126 may be disposed on the other side of the blade fixture 1124 (shown in Figures 3 and 4b, spaced apart from the telescopic element 1128), and the connecting element 1126 may be disposed on the center element 1122 ). ≪ / RTI >

The blade fixture 1124 and the central element 1122 can allow horizontal rotation about the linking element 1126 and can be rotated about the axis of rotation of the blade fixture 1124 and the center element 1122 may be rotated apart from each other.

That is, the blade fixing base 1124 can be moved (rotated in the horizontal direction) with respect to the center element 1122, and the rotary member 114 provided on the blade fixing base 1124 can be moved in the tangential direction The angles that deviate from the angles can be changed.

5 illustrates a variation of the blade 120 and the adjustment unit 130 according to the driving mode of the propeller 100 in which the pitch and the turning radius of the blade 120 according to an embodiment are variable.

5A is a side view showing a variation of the blade 120 and the adjustment unit 130 of the propeller 100 in which the pitch and the turning radius of the blade 120 according to one embodiment are variable, 5C is a sectional view showing a variation of the pitch of the blades 120 and a turning radius of the blades 120 of the propeller 100 according to an embodiment of the present invention. (120) of the blade (100).

5A to 5C, the propeller 100 having the pitch and the turning radius of the blade 120 according to one embodiment may further include a control unit.

The control unit can control the upward and downward movement of the adjustment unit 130 and also adjust the angle of the rotary member 114 with respect to the center element 1122 by controlling the expansion and contraction of the expansion and contraction element 1128. [

Specifically, the control unit may control the adjusting unit 130 to drive the propeller 100 in the thrust increasing mode and the speed increasing mode.

The thrust increasing mode is a mode in which the adjusting unit 130 is lowered so that the blades 120 are disposed horizontally (unfolded) to each other. In the thrust increasing mode, the blades 120 are horizontally So that the total radius of rotation of the blades 120 is increased and the pitch of the blades 120 is reduced. 5A to 5C, the plurality of blades 120 of the thrust increasing mode and the adjusting unit 130 are indicated by a solid line M1.

The speed increasing mode is a mode which is advantageous for high-speed movement and is arranged such that an angle is formed (collapsed) between the blades 120 by raising and lowering the adjusting unit 130. In the speed increasing mode, In which the total radius of rotation of the blades 120 is reduced and the pitch of the blades 120 is increased. 5A to 5C, the plurality of blades 120 in the speed increasing mode and the adjusting unit 130 are indicated by a dotted line M2.

5A and 5C, the solid line M1 and the broken line M2 show the change in the radius of rotation of the propeller 100 in the thrust increasing mode and the speed increasing mode, and in FIGS. 5A and 5C, (M2) shows the change of the pitch of the blade 120 and the rotation of the blade tip 122 and the engaging member 124. Fig.

The axis of the rotating member 114 disposed on the blade fixing base 1124 of the hub 110 is adjusted so as to adjust the pitch and the turning radius of the blades 120 through the upward and downward movement of the adjusting unit 130 And can be positioned in a direction that is offset from the tangential direction of the rotational direction of the propeller 100, as shown in Figs. 4A and 4B, in a horizontal state with the hub 110. [

Alternatively, the axis of the rotating member 114 may be formed obliquely on the hub 110.

Specifically, the rotary member 114 is installed such that the height of one end and the other end of the rotary member with respect to the hub 110 are different from each other such that the axis of the rotary member 114 is tilted up and down on the hub 110 . Accordingly, the position of the blade tip 112 of the blade 120 pivoted about the rotary member 114 can be changed.

The control unit can control the expansion and contraction of the expansion and contraction element 1128 and the blade fixing base 1124 is moved in accordance with the expansion and contraction of the expansion and contraction element 1128 such that the axis of the rotation member 114 is parallel to the tangential direction of the rotation direction of the propeller 100 Can be controlled to be shifted. Since the pitch of the blade 120 due to the rising and falling of the blade tip 122 is increased as the axis of the rotating member 114 deviates from the tangential direction of the direction of rotation of the propeller 100 The control unit can control the amount of pitch change of the blade 120 through the expansion and contraction of the elastic member 1128 of the blade 120. In this case,

According to the above description, the propeller in which the pitch and the turning radius of the blade are varied according to the embodiment can change the shape of the propeller according to the driving mode to improve the efficiency, and the pitch of the blade and the turning radius of the blade Can be changed. In addition, according to one embodiment, the pitch and the turning radius of the blades can be varied, and the pitch and the turning radius of the blades can be varied with a simple structure and a low cost.

Although the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And various modifications and changes may be made thereto without departing from the scope of the present invention. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

100: Propeller
110: Hub
112: Angle adjusting member
1122: center element
1124: blade fixture
1126: Connection Element
1128: elastic element
114: rotating member
120: blade
122: blade tip
124:
130:
132: adjusting shaft

Claims (7)

Herb; And
A plurality of blades installed on the hub via a rotating member, the blade tips being pivoted up and down;
/ RTI >
Wherein a pitch of the blades and a turning radius of the blades are varied at the same time so that the pitch and the turning radius of the blades are variable.
The method according to claim 1,
Further comprising an adjustment unit that is raised and lowered on the hub,
The plurality of blades including an engagement member extending past the rotary member in an opposite direction of the blade tip and disposed above the adjustment member,
The engaging member and the adjusting portion are brought into contact with each other so that the engaging member ascends and descends with respect to the rotating member by raising and lowering the adjusting portion,
Wherein a tip of the blade is pivoted upward or downward as the latching member ascends and descends, and the pitch and radius of rotation of the blade are variable.
3. The method of claim 2,
Further comprising a control unit for controlling the rise and fall of the adjustment unit,
Wherein,
A speed increasing mode in which the adjusting unit is raised and lowered to fold the blades; And
A thrust increasing mode in which the adjustment unit is lowered so that the blades do not collapse;
Lt; / RTI >
In the thrust increasing mode, the blades are horizontally arranged so that the total turning radius of the blades is increased, the pitch of the blades is reduced,
Wherein in the speed increasing mode an angle is formed between the blades so that the total radius of rotation of the blades is reduced and the pitch of the blades is increased, the pitch and radius of rotation of the blades varying.
The method according to claim 1,
Wherein the hub includes an angle adjusting section that adjusts an angle between an axis of the rotating member and a tangential direction of the rotating direction of the blade, wherein the pitch and the turning radius of the blade are variable.
5. The method of claim 4,
The angle adjusting unit
Center element;
A blade holder connected to the center element and having the rotary member installed therein;
A connecting element for relatively rotating one side of the blade fixing table and one side of the center element; And
A stretchable element that connects the other side of the blade fixing table and the other side of the center element, and is stretchable and contractible;
Lt; / RTI >
Wherein a pitch and a turning radius of the blade are variable, in which an axial angle of the rotary member with respect to the central element is variable as the expansion and contraction of the expansion and contraction element is varied.
3. The method of claim 2,
The adjustment portion includes an adjustment shaft passing through the center of the hub,
Wherein the adjustment shaft is linearly moved so as to raise and lower the adjustment portion and to pivot the engagement member, wherein the pitch and the turning radius of the blade are variable.
The method according to claim 1,
Wherein the rotating member is configured such that the axis of the rotating member is tilted in an up and down direction of the hub to increase a pitch variation amount of the blades as the blade tip moves up and down.

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