A propeller blade counterweight support

Abstract

The present invention discloses a propeller blade counterweight support, wherein the support body is a rotating body, and one end of the foam core close to the carbon tube is provided with two grooves and a mounting hole, and the support body is respectively inserted into the inner cavity of the carbon tube and the mounting hole of the foam core, and at the same time, a central counterweight hole and a plurality of edge counterweight holes are respectively provided on the support body along its axial direction, and the central counterweight hole is located at the center of the support body, and the plurality of edge counterweight holes are distributed in a circular array around the central counterweight hole, and one end of the central counterweight hole and the plurality of edge counterweight holes are both open ends, and the other ends are both closed ends. The present invention discloses a propeller blade counterweight support, which can adjust the large and small axis torques of the blade to ensure the balance of the propeller, and can avoid the problem of aerodynamic imbalance, thereby improving safety and reliability.

Description

Technical Field

[0001] The invention relates to the technical field of propellers, and more particularly to a propeller blade counterweight support. Background Art

[0002] At present, the propeller is composed of 6 composite blades. Since the center of gravity distribution of each blade is inconsistent, the eccentricity will cause imbalance of propeller mass force during rotation, causing propeller vibration. To solve this problem, it is necessary to control the torque value of each blade within a certain range by adjusting the center of gravity of the blade. Now, the method of adjusting the length and width of the blade is generally used to adjust the torque of the large and small axes of the blade to restore the balance of the propeller mass force. However, this method will cause aerodynamic imbalance of the blade, which will bring great safety hazards.

[0003] Therefore, how to provide a propeller blade counterweight support structure that can adjust the large and small axis torques of the blades to ensure the balance of the propeller and is safe and reliable is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] In view of this, the present invention provides a propeller blade counterweight support, which can adjust the large and small axis torques of the blades to ensure the balance of the propeller, while avoiding the problem of aerodynamic imbalance, thereby improving safety and reliability.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A propeller blade counterweight support, the propeller blade comprises, from outside to inside, a blade root jacket, a padding cloth and a carbon beam, the padding cloth is respectively connected to the blade root jacket and the carbon beam, and the carbon beam is respectively connected to a carbon tube and a foam core, the carbon tube is connected to the foam core, and the carbon tube is close to the blade root, and the foam core is close to the blade tip; comprising:

[0007] A support body, wherein the support body is a rotating body, and the foam core is provided with two grooves and a mounting hole at one end close to the carbon tube, and the support body is respectively inserted into the inner cavity of the carbon tube and the mounting hole of the foam core, and at the same time, a central counterweight hole and multiple edge counterweight holes are respectively provided on the support body along its axial direction, and the central counterweight hole is located at the center of the support body, and the multiple edge counterweight holes are distributed in a circular array around the central counterweight hole, and one end of the central counterweight hole and the multiple edge counterweight holes are both open ends, and the other ends are both closed ends.

[0008] Preferably, the closed ends of the central counterweight hole and the plurality of edge counterweight holes are provided with through-going air holes.

[0009] Preferably, the diameters of the plurality of edge counterweight holes are the same and are smaller than the diameter of the central counterweight hole.

[0010] Preferably, the support body comprises: a first shaft and a second shaft, the diameter of the first shaft is larger than the diameter of the second shaft, one end of the second shaft is fixed to one end of the first shaft, and the second shaft is coaxial with the first shaft;

[0011] The central counterweight hole is respectively opened on the first shaft and the second shaft along the central axis of the first shaft and the second shaft, and the plurality of edge counterweight holes are opened on the first shaft along the axial direction of the first shaft, and the open ends of the central counterweight hole and the plurality of edge counterweight holes are both located at the end of the first shaft away from the second shaft, the closed end of the central counterweight hole is located at the end of the second shaft away from the first shaft, and the closed ends of the plurality of edge counterweight holes are both located at the end of the first shaft connected to the second shaft;

[0012] The first shaft is located in the carbon tube, and both ends of the first shaft extend to the two tube openings of the carbon tube in a one-to-one correspondence. The first shaft is connected to one end of the second shaft, and the second shaft is inserted into the mounting hole of the foam core.

[0013] Preferably, a circle of annular limit platforms is fixed on the outer wall of the first shaft, and the annular limit platform is close to the end of the first shaft away from the second shaft, and the annular limit platform abuts against the end of the carbon tube away from the second shaft, and the end of the first shaft away from the second shaft abuts against one end of the carbon tube.

[0014] Preferably, two latches are fixed to one end of the first shaft connected to the second shaft, and the two latches are engaged and connected with two grooves on the foam core in a one-to-one correspondence.

[0015] Preferably, the support body is made of nylon material, and the wall thickness of the central counterweight hole and the plurality of edge counterweight holes is 5 mm.

[0016] Preferably, the support body is bonded to the carbon tube and the foam core respectively by sealant.

[0017] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a propeller blade counterweight support, which can achieve the following technical effects:

[0018] The present invention can adjust the large axis moment of the blade by installing a counterweight in the central counterweight hole, can adjust the small axis moment of the blade by installing a counterweight in the edge counterweight hole, and can also adjust the large axis moment of the blade by installing a counterweight in the symmetrical edge counterweight holes, thereby ensuring the balance of the propeller and avoiding the method of adjusting the length and width of the blade to adjust the balance of the blade. Therefore, the present invention can avoid the problem of aerodynamic imbalance, thereby improving the safety and reliability of the present invention;

[0019] The present invention exhausts air through the vent holes penetrating the closed ends of the central counterweight hole and the plurality of edge counterweight holes, thereby preventing the counterweight from being unable to be properly installed due to the inability to exhaust internal gas during the counterweight placement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A cross-sectional view of a propeller blade counterweight support connected to a propeller blade according to the present invention;

[0022] Figure 2 This is an overall structural diagram of a propeller blade counterweight support of the present invention;

[0023] Figure 3 The present invention is a side view of a propeller blade counterweight support (showing the opening end of the central counterweight hole and the edge counterweight hole).

[0024] Among them, 1-propeller root jacket; 2-pad cloth; 3-carbon beam; 4-carbon tube; 5-foam core; 6-support body; 601-center counterweight hole; 602-edge counterweight hole; 600-air vent; 61-first axis; 62-second axis; 611-annular limit platform; 612-pin. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The embodiment of the present invention discloses a propeller blade counterweight support, which includes, from outside to inside, a propeller root jacket 1, a padding cloth 2 and a carbon beam 3, the padding cloth 2 is respectively connected to the propeller root jacket 1 and the carbon beam 3, and the carbon beam 3 is respectively connected to a carbon tube 4 and a foam core 5, the carbon tube 4 and the foam core 5 are connected, and the carbon tube 4 is close to the propeller root, and the foam core 5 is close to the propeller tip; including:

[0027] The support body 6 is a rotating body, and two grooves and a mounting hole are provided at one end of the foam core 5 close to the carbon tube 4. The support body 6 is respectively inserted into the inner cavity of the carbon tube 4 and the mounting hole of the foam core 5. At the same time, a central counterweight hole 601 and multiple edge counterweight holes 602 are respectively provided on the support body 6 along its axial direction, and the central counterweight hole 601 is located at the center of the support body 6, and the multiple edge counterweight holes 602 are distributed in a circular array around the central counterweight hole 601, and one end of the central counterweight hole 601 and the multiple edge counterweight holes 602 are both open ends, and the other ends are both closed ends.

[0028] The present invention can adjust the large axis torque of the blade by installing a counterweight block in the central counterweight hole 601, and can adjust the small axis torque of the blade by installing a counterweight block in the edge counterweight hole 602. The large axis torque of the blade can also be adjusted by installing a counterweight block in the symmetrical edge counterweight hole 602, thereby ensuring the balance of the propeller and avoiding the use of the method of adjusting the length and width of the blade to adjust the balance of the blade. Therefore, the present invention can avoid the problem of aerodynamic imbalance, thereby improving the safety and reliability of the present invention.

[0029] In order to further optimize the above technical solution, the closed ends of the central counterweight hole 601 and the plurality of edge counterweight holes 602 are provided with through-going air holes 600 .

[0030] The present invention adopts the above technical solution, which can achieve the following beneficial effects: exhaust is discharged through the air vent 600, so as to prevent the counterweight block from being unable to be installed in place due to the inability to discharge internal gas during the placement of the counterweight block.

[0031] In order to further optimize the above technical solution, the apertures of the plurality of edge counterweight holes 602 are the same and are all smaller than the aperture of the central counterweight hole 601 .

[0032] The present invention adopts the above-mentioned technical scheme, and the beneficial effect that can be achieved is: a counterweight block with a larger volume and weight is installed in the center counterweight hole 601, and a counterweight block with a smaller volume and weight is installed in the aperture of the edge counterweight hole 602, so that according to actual needs, the center counterweight hole 601 and multiple edge counterweight holes 602 can be matched to achieve the effect of adjusting the axial torque of the blade.

[0033] In order to further optimize the above technical solution, the support body 6 includes: a first shaft 61 and a second shaft 62, the diameter of the first shaft 61 is larger than the diameter of the second shaft 62, and one end of the second shaft 62 is fixed to one end of the first shaft 61, and the second shaft 62 is coaxial with the first shaft 61;

[0034] The central counterweight hole 601 is respectively opened on the first shaft 61 and the second shaft 62 along the central axis of the first shaft 61 and the second shaft 62, and the plurality of edge counterweight holes 602 are opened on the first shaft 61 along the axial direction of the first shaft 61, and the open ends of the central counterweight hole 601 and the plurality of edge counterweight holes 602 are both located at an end of the first shaft 61 away from the second shaft 62, the closed end of the central counterweight hole 601 is located at an end of the second shaft 62 away from the first shaft 61, and the closed ends of the plurality of edge counterweight holes 602 are both located at an end of the first shaft 61 connected to the second shaft 62;

[0035] The first shaft 61 is located in the carbon tube 4 , and both ends of the first shaft 61 extend to the two tube openings of the carbon tube 4 in a one-to-one correspondence, and one end of the first shaft 61 connected to the second shaft 62 and the second shaft 62 are both inserted into the mounting hole of the foam core 5 .

[0036] The present invention adopts the above-mentioned technical scheme, and the beneficial effect that can be achieved is: the shape of the support body 6 is adapted to the shape and structure of the blade, so that the present invention can be stably installed on the propeller blade, so as to improve the stability of the installation of the counterweight block, thereby improving the stability and accuracy of the present invention in adjusting the large and small axis torque of the blade.

[0037] In order to further optimize the above technical solution, a circle of annular limit platform 611 is fixed on the outer wall of the first shaft 61, and the annular limit platform 611 is close to the end of the first shaft 61 away from the second shaft 62, and the annular limit platform 611 is abutted against the end of the carbon tube 4 away from the second shaft 62, and the end of the first shaft 61 away from the second shaft 62 is abutted against one end of the carbon tube 4.

[0038] The present invention adopts the above technical solution to achieve the following beneficial effects: the annular limit platform 611 abuts against the end of the carbon tube 4 away from the second axis 62, thereby preventing the present invention from moving toward the blade tip under the action of centrifugal force, thereby preventing the problem of propeller balance failure.

[0039] In order to further optimize the above technical solution, two latches 612 are fixed to one end of the first shaft 61 connected to the second shaft 62 , and the two latches 612 are engaged and connected with the two grooves on the foam core 5 in a one-to-one corresponding manner.

[0040] The present invention adopts the above technical solution, which can achieve the beneficial effect of improving the tightness and stability of the connection between the present invention and the propeller blade.

[0041] In order to further optimize the above technical solution, the support body 6 is made of nylon material, and the wall thickness of the central counterweight hole 601 and the plurality of edge counterweight holes 602 are both 5 mm.

[0042] The present invention adopts the above technical solution, which can achieve the following beneficial effects: the strength and rigidity of the present invention are ensured while the weight of the blade is reduced, and the friction coefficient of the counterweight block can be reduced at the same time.

[0043] In order to further optimize the above technical solution, the support body 6 is bonded to the carbon tube 4 and the foam core 5 respectively by means of sealant.

[0044] The present invention adopts the above technical solution, which can achieve the beneficial effects of: preventing the present invention from rotating during use, causing the propeller to fail to balance, and at the same time ensuring that the position of the counterweight support of each blade is basically consistent. Example 1

[0045] The embodiment of the present invention discloses a propeller blade counterweight support, which is fixed to the root of the propeller blade, so that the first shaft 61 is located in the carbon tube 4, and the two ends of the first shaft 61 extend to the outside of the two tube openings of the carbon tube 4 in a one-to-one correspondence, and the first shaft 61 is connected to one end of the second shaft 62 and the second shaft 62 is inserted into the mounting hole of the foam core 5, and at the same time, a circle of annular limiting platform 611 on the outer wall of the first shaft 61 abuts against the end of the carbon tube 4 away from the second shaft 62, and the first shaft 61 and the second shaft 62 are bonded to the carbon tube 4 and the foam core 5 by sealant.

[0046] The present invention can adjust the large axis moment of the blade by installing a counterweight in the central counterweight hole 601, and can adjust the small axis moment of the blade by installing a counterweight in the edge counterweight hole 602. The large axis moment of the blade can also be adjusted by installing a counterweight in the symmetrical edge counterweight holes 602, thereby ensuring the balance of the propeller and avoiding the method of adjusting the length and width of the blade to adjust the balance of the blade. Therefore, the present invention can avoid the problem of aerodynamic imbalance, thereby improving the safety and reliability of the present invention;

[0047] In addition, the present invention exhausts air through the vent holes 600 that penetrate the closed ends of the central counterweight hole 601 and multiple edge counterweight holes 602, thereby preventing the counterweight block from being unable to be installed in place due to the inability to exhaust internal gas during the placement of the counterweight block.

[0048] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0049] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A propeller blade counterweight support, wherein the propeller blades are arranged from outside to inside in order include: A blade root jacket (1), a padding cloth (2) and a carbon beam (3), wherein the padding cloth (2) is respectively connected to the blade root jacket (1) and the carbon beam (3), and the carbon beam (3) is respectively connected to a carbon tube (4) and a foam core (5), wherein the carbon tube (4) and the foam core (5) are connected, and the carbon tube (4) is close to the blade root and the foam core (5) is close to the blade tip; characterized in that it comprises: A support body (6), wherein the support body (6) is a rotating body, and the end of the foam core (5) close to the carbon tube (4) is provided with two grooves and a mounting hole, and the support body (6) is respectively inserted into the inner cavity of the carbon tube (4) and the mounting hole of the foam core (5), and the support body (6) is provided with a central counterweight hole (601) and a plurality of edge counterweight holes (602) along its axial direction, and the central counterweight hole (601) is located at the center of the support body (6), and the plurality of edge counterweight holes (602) are distributed in a circular array around the central counterweight hole (601), and the ends of the central counterweight hole (601) and the plurality of edge counterweight holes (602) away from the foam core (5) are both open ends, and the other ends are both closed ends; The closed ends of the central counterweight hole (601) and the plurality of edge counterweight holes (602) are each provided with a through-going air hole (600); The diameters of the plurality of edge counterweight holes (602) are the same and are all smaller than the diameter of the central counterweight hole (601); The support body (6) comprises: a first shaft (61) and a second shaft (62), the diameter of the first shaft (61) being larger than the diameter of the second shaft (62), one end of the second shaft (62) being fixed to one end of the first shaft (61), and the second shaft (62) being coaxial with the first shaft (61); The central counterweight hole (601) is respectively opened on the first shaft (61) and the second shaft (62) along the central axis of the first shaft (61) and the second shaft (62); the plurality of edge counterweight holes (602) are opened on the first shaft (61) along the axial direction of the first shaft (61); the open ends of the central counterweight hole (601) and the plurality of edge counterweight holes (602) are both located at an end of the first shaft (61) away from the second shaft (62); the closed end of the central counterweight hole (601) is located at an end of the second shaft (62) away from the first shaft (61); and the closed ends of the plurality of edge counterweight holes (602) are both located at an end of the first shaft (61) connected to the second shaft (62).

2. A propeller blade counterweight support according to claim 1, It is characterized in that The first shaft (61) is located in the carbon tube (4), and two ends of the first shaft (61) extend one-to-one to the outside of two tube openings of the carbon tube (4), and the first shaft (61) is connected to one end of the second shaft (62), and the second shaft (62) is inserted into the mounting hole of the foam core (5), and one end of the first shaft (61) away from the second shaft (62) abuts against one end of the carbon tube (4).

3. A propeller blade counterweight support according to claim 2, It is characterized in that A ring-shaped limit platform (611) is fixed on the outer wall of the first shaft (61), and the ring-shaped limit platform (611) is close to an end of the first shaft (61) away from the second shaft (62), and the ring-shaped limit platform (611) abuts against an end of the carbon tube (4) away from the second shaft (62).

4. A propeller blade counterweight support according to claim 2, It is characterized in that Two latches (612) are fixed to one end of the first shaft (61) connected to the second shaft (62), and the two latches (612) are engaged and connected with two grooves on the foam core (5) in a one-to-one corresponding manner.

5. A propeller blade counterweight support according to claim 1, It is characterized in that The support body (6) is made of nylon material, and the wall thickness of the central counterweight hole (601) and the plurality of edge counterweight holes (602) are both 5 mm.

6. A propeller blade counterweight support according to claim 1, It is characterized in that The support body (6) is respectively bonded to the carbon tube (4) and the foam core (5) by means of a sealant.

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