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CN-224211254-U - Rotor blade with high balance performance

CN224211254UCN 224211254 UCN224211254 UCN 224211254UCN-224211254-U

Abstract

The utility model belongs to the technical field of aircrafts, and particularly relates to a rotor wing with high balance performance, which comprises a rotor wing body with a sheet-shaped structure, wherein the rotor wing body comprises a skin, a supporting girder filled in the skin and a foam piece, the supporting girder is a D-shaped girder with a hollow cavity formed in the supporting girder, one end of the supporting girder, which is far away from the foam piece, is provided with a metal balancing weight, the end face of the metal balancing weight, which is far away from the foam piece, is a matched cambered surface matched with the front edge of the rotor wing body.

Inventors

  • SHEN BENZHONG

Assignees

  • 常州中联飞机制造有限公司

Dates

Publication Date
20260508
Application Date
20250519

Claims (7)

  1. 1. The rotor wing with the high balance performance is characterized by comprising a rotor wing body (100) with a sheet-shaped structure, wherein the rotor wing body (100) comprises a skin (1), a supporting girder (2) filled in the skin (1) and a foam piece (3), the supporting girder (2) is a D-shaped girder with a hollow cavity (201) formed inside, one end of the supporting girder (2) deviating from the foam piece (3) is provided with a metal balancing weight (4), and the end face of one end of the metal balancing weight (4) deviating from the foam piece (3) is a matched cambered surface (401) matched with the front edge of the rotor wing body (100).
  2. 2. A rotor blade with high balance performance according to claim 1, wherein the cross-sectional area of the hollow chamber (201) gradually increases from the front edge to the rear edge, and the front end is a cambered surface and the rear end is a plane to form a D-shaped structure.
  3. 3. The rotor blade with high balance performance of claim 1, wherein the supporting girder (2) protrudes towards the direction of the metal balancing weight (4) to form a first protruding part (202), the metal balancing weight (4) is concavely formed with a first concave part (402) for embedding the first protruding part (202), and the matching surface of the first protruding part (202) and the first concave part (402) is a first cambered surface.
  4. 4. The rotor blade with high balance performance according to claim 1, wherein the supporting girder (2) is provided with a second protruding part (203) protruding towards the direction of the foam piece (3), the foam piece (3) is provided with a second recessed part (301) in a recessed mode, the second protruding part (203) is embedded in the second recessed part, and the matching surface of the second protruding part (203) and the second recessed part (301) is a second cambered surface.
  5. 5. A rotor blade with high balance performance according to claim 1, wherein the rotor body (100) has an upper airfoil surface (101) and a lower airfoil surface (102) with an arc-shaped structure, and the curvature of the upper airfoil surface (101) is larger than the curvature of the lower airfoil surface (102).
  6. 6. A rotor blade with high balancing properties according to claim 1, characterized in that the end of the foam piece (3) facing away from the support girder (2) is fitted with a trailing edge strip (5).
  7. 7. A rotor blade with high balance performance according to claim 1, characterized in that the metal counter weight (4) is a lead block.

Description

Rotor blade with high balance performance Technical Field The utility model belongs to the technical field of aircrafts, and particularly relates to a rotor wing with high balance performance. Background Chinese patent publication No. CN201971156U discloses a front edge counterweight of helicopter rotor blade, which comprises a skin, a front edge counterweight filled in the skin, a girder and foam, the front edge counterweight is formed by connecting a plurality of front edge counterweight, each front edge counterweight is a cylindrical slender rod, the section of the front edge counterweight is circular, the front edge counterweight is different from the front edge of the blade in shape, and cannot be completely attached, so that the weight distribution is uneven, and the strength and balance of the whole blade are reduced. Disclosure of utility model The utility model aims to solve the technical problems that the weight of the front edge of a rotor wing is uneven due to uneven weight distribution caused by the fact that the front edge of the rotor wing is different from the front edge of the blade in shape and the section of the front edge of the rotor wing is circular, and the strength and balance of the whole blade are reduced in the prior art, and provides a rotor wing with high balance performance. The rotor wing with the high balance performance comprises a rotor wing body with a sheet-shaped structure, wherein the rotor wing body comprises a skin, a supporting girder and a foam piece, the supporting girder is a D-shaped girder, a hollow cavity is formed in the supporting girder, a metal balancing weight is arranged at one end, away from the foam piece, of the supporting girder, and the end face, away from the foam piece, of the metal balancing weight is a matched cambered surface matched with the front edge of the rotor wing body. Further, the cross-sectional area of the hollow cavity gradually increases from the front edge to the rear edge, the front end of the hollow cavity is an arc surface, and the rear end of the hollow cavity is a plane to form a D-shaped structure. Further, the supporting girder protrudes towards the direction of the metal balancing weight to form a first protruding portion, the metal balancing weight is sunken to form a first recessed portion for the first protruding portion to be embedded, and the matching surfaces of the first protruding portion and the first recessed portion are all first cambered surfaces. Further, the supporting girder protrudes towards the foam piece to form a second protruding portion, the foam piece is concavely formed with a second recessed portion for the second protruding portion to be embedded in, and the matching surfaces of the second protruding portion and the second recessed portion are second cambered surfaces. Further, the rotor blade is provided with an upper airfoil surface and a lower airfoil surface with arc structures, and the curvature of the upper airfoil surface is larger than that of the lower airfoil surface. Further, the end of the foam piece facing away from the supporting girder is provided with a trailing edge strip. Further, the metal balancing weight is a lead block. The utility model has the beneficial effects that the supporting girder with the D-shaped structure is used for replacing the supporting girder with the C-shaped structure in the prior art, the integral structural strength of the rotor wing is improved, the gravity center is adjusted by utilizing the metal balancing weight, the front end of the metal balancing weight is mutually attached to the front edge of the rotor wing, the positioning effect of the metal balancing weight is improved, the consistency of weight distribution is improved, and the balance of the whole rotor wing is improved. Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the application, which proceeds with reference to the accompanying drawings. Drawings The utility model will be further described with reference to the drawings and examples. FIG. 1 is a cross-sectional view of the present utility model; FIG. 2 is a top view of the present utility model; In the figure: 100. A rotor body; 1. A skin; 101, upper airfoil surface, 102, lower airfoil surface; 2. Support girder, 201, hollow chamber, 202, first bulge, 203, second bulge; 3. 301, second concave part; 4. The metal balancing weight is 401, matched with the cambered surface, 402 and the first concave part; 5. A trailing edge strip; 6. And a mounting end. Detailed Description The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only those features which are relevant to the utility model, and orientation and reference (e.g., up, down, left, right, etc.) may