阅读说明：本技术 一种带拉杆加强结构的对开式异型喷管 (Split type special-shaped spray pipe with pull rod reinforcing structure ) 是由 李环 邓洁 张琪 黄标 于 2021-08-19 设计创作，主要内容包括：一种带拉杆加强结构的对开式异型喷管,包括管体,在管体的内部设置有至少一根拉杆,所述拉杆的上端与管体的上壁连接,下端与管体的下壁连接；所述管体为分体式结构,包括沿YZ平面对称设置的左管体和右管体,在所述左管体、右管体相对的边缘上分别设置有对开法兰加强边,所述左管体和右管体通过对开法兰加强边连接。本发明采用拉杆连接管体的上壁与下壁,以控制异型喷管应力和变形,避免了传统异形喷管采用加强环结构或是密布网格状加强筋结构带来的重量问题；管体采用为分体式结构分为左管体和右管体,降低加工难度,便于异形结构成型加工。(The split type special-shaped spray pipe with the pull rod reinforcing structure comprises a pipe body, wherein at least one pull rod is arranged inside the pipe body, the upper end of the pull rod is connected with the upper wall of the pipe body, and the lower end of the pull rod is connected with the lower wall of the pipe body; the pipe body is of a split type structure and comprises a left pipe body and a right pipe body which are symmetrically arranged along a YZ plane, opposite edges of the left pipe body and the right pipe body are respectively provided with split flange reinforcing edges, and the left pipe body and the right pipe body are connected through the split flange reinforcing edges. According to the invention, the pull rod is adopted to connect the upper wall and the lower wall of the pipe body so as to control the stress and deformation of the special-shaped spray pipe, so that the weight problem caused by the adoption of a reinforcing ring structure or a structure of densely distributing latticed reinforcing ribs in the traditional special-shaped spray pipe is avoided; the body adopts and divide into left body and right body for split type structure, reduces the processing degree of difficulty, the special-shaped structure contour machining of being convenient for.)

1. The utility model provides a take pull rod additional strengthening's open heterotypic spray tube, includes body (10), its characterized in that: at least one pull rod (50) is arranged in the tube body (10), the upper end of the pull rod (50) is connected with the upper wall of the tube body (10), and the lower end of the pull rod is connected with the lower wall of the tube body (10).

2. The split profiled nozzle with the tie-bar reinforcement structure of claim 1, wherein: the pipe body (10) is of a split structure and comprises a left pipe body (101) and a right pipe body (102) which are symmetrically arranged along a YZ plane, opposite edges of the left pipe body (101) and the right pipe body (102) are respectively provided with split flange reinforcing edges (20), and the left pipe body (101) and the right pipe body (102) are connected through the split flange reinforcing edges (20).

3. The split type special-shaped spray pipe with the pull rod reinforcing structure as claimed in claim 2, wherein: a front flange reinforcing edge (30) is arranged at the front end of the pipe body (10), and a rear flange reinforcing edge (40) is arranged at the rear end of the pipe body (10); one end of the split flange reinforcing edge (20) is connected with the front flange reinforcing edge (30), and the other end of the split flange reinforcing edge is connected with the rear flange reinforcing edge (40).

4. The split type special-shaped spray pipe with the pull rod reinforcing structure as claimed in claim 2, wherein: when the left pipe body (101) is connected with the right pipe body (102), the split flange reinforcing edges (20) are connected through bolts or rivets.

5. The split type special-shaped spray pipe with the pull rod reinforcing structure as claimed in claim 2, wherein: when the left pipe body (101) is connected with the right pipe body (102), a sealing strip is arranged between the split flange reinforcing edges (20).

6. The split type special-shaped spray pipe with the pull rod reinforcing structure as claimed in claim 3, wherein: the front flange reinforcing edge (30), the rear flange reinforcing edge (40) and the pipe body (10) are connected in a welding mode; the split flange reinforcing edges (20) are respectively connected with the left pipe body (101) and the right pipe body (102) in a welding mode.

7. The split type special-shaped spray pipe with the pull rod reinforcing structure as claimed in claim 2, wherein: the number of the pull rods (50) is four, the pull rods (50) are arranged at the intersection positions of 60mm on two sides of a YZ symmetrical plane of the pipe body (10) and trisection sections along the Z direction, two of the pull rods are arranged on the left pipe body (101), and the other two pull rods are arranged on the right pipe body (102).

8. The split profiled nozzle with the tie-bar reinforcement structure of claim 1, wherein: a base plate (60) is arranged at the position where the pipe body (10) is connected with the pull rod (50), and the base plate (60) is welded on the outer surface of the pipe body (10).

9. The split profiled nozzle with the tie-bar reinforcement structure of claim 1, wherein: the diameter of the pull rod (50) is phi 4 mm-phi 16 mm.

10. The split profiled nozzle with the tie-bar reinforcement structure of claim 1, wherein: the shape of the pipe body (10) is as follows: along the positive direction of the Z axis, the section shape gradually transits from an ellipse to an inverted trapezoid.

Technical Field

The invention relates to the technical field of jet pipes of aero-engines, in particular to a split type special-shaped jet pipe with a pull rod reinforcing structure.

Background

The thrust-weight ratio is an important index of the aircraft engine, and the lighter the same thrust and the lighter the mass, the better the engine. Compared with the conventional circular spray pipe, the special-shaped spray pipe has lower pressure-bearing capacity, the stress and deformation of the special-shaped spray pipe are obviously larger under the same load condition, and a proper reinforcing structure is required to be designed to control the maximum stress and the maximum deformation.

The conventional reinforcing structure of the special-shaped spray pipe is that a large rectangular reinforcing ring structure or a densely-distributed latticed reinforcing rib structure is arranged outside the spray pipe, so that great weight cost is usually paid for the maximum stress and the maximum deformation in a proper range; in addition, the special-shaped spray pipe structure is a special-shaped structure, and the integral pipe body structure is troublesome to process and manufacture.

Disclosure of Invention

The invention mainly aims to provide a split type special-shaped spray pipe with a pull rod reinforcing structure, and aims to solve the technical problem.

In order to achieve the purpose, the invention provides a split type special-shaped spray pipe with a pull rod reinforcing structure, which comprises a pipe body, wherein at least one pull rod is arranged inside the pipe body, the upper end of the pull rod is connected with the upper wall of the pipe body, and the lower end of the pull rod is connected with the lower wall of the pipe body.

Preferably, the pipe body is of a split structure and comprises a left pipe body and a right pipe body which are symmetrically arranged along a YZ plane, opposite edges of the left pipe body and the right pipe body are respectively provided with a split flange reinforcing edge, and the left pipe body and the right pipe body are connected through the split flange reinforcing edges.

Preferably, a front flange reinforcing edge is arranged at the front end of the pipe body, and a rear flange reinforcing edge is arranged at the rear end of the pipe body; one end of the split flange reinforcing edge is connected with the front flange reinforcing edge, and the other end of the split flange reinforcing edge is connected with the rear flange reinforcing edge; the front flange reinforcing edge and the rear flange reinforcing edge are respectively used for being connected with adjacent spray pipes, and connecting holes are formed in the front flange reinforcing edge, the rear flange reinforcing edge and the split flange reinforcing edge.

Preferably, when the left pipe body and the right pipe body are connected, the split flange reinforcing edges are connected through bolts or rivets.

Preferably, when the left pipe body and the right pipe body are connected, a sealing strip is arranged between the reinforcing edges of the split flanges.

Preferably, the front flange reinforcing edge and the rear flange reinforcing edge are connected with the pipe body in a welding mode; the split flange reinforcing edges are respectively connected with the left pipe body and the right pipe body in a welding mode. And the welding mode is adopted for connection, which is beneficial to ensuring the air tightness of the spray pipe.

Preferably, the number of the pull rods is four, the pull rods are arranged at the intersection positions of 60mm on two sides of a YZ symmetrical plane of the pipe body and a trisection cross section along the Z direction, two of the pull rods are arranged on the left pipe body, and the other two pull rods are arranged on the right pipe body. Four pull rods are uniformly distributed on the pipe body, so that the stress uniformity of the whole pipe body can be better ensured, and the deformation of the pipe body is avoided.

Preferably, a base plate is arranged at the position where the pipe body is connected with the pull rod, the base plate is welded on the outer surface of the pipe body, and two ends of the pull rod extend out of the outer surface of the base plate and are welded with the base plate. Through setting up the backing plate for increase the lifting surface area between pull rod and the body, play the intensity of reinforcing body and pull rod junction, avoid the pull rod direct action to take place to warp on the body wall.

Preferably, the diameter of the pull rod is phi 4 mm-phi 16 mm.

Preferably, the shape of the tube body is: along the positive direction of the Z axis, the section shape gradually transits from an ellipse to an inverted trapezoid.

The invention has the following beneficial effects:

(1) according to the invention, the pull rod is adopted to connect the upper wall and the lower wall of the pipe body so as to control the stress and deformation of the special-shaped spray pipe, so that the weight problem caused by the adoption of a reinforcing ring structure or a structure of densely distributing latticed reinforcing ribs in the traditional special-shaped spray pipe is avoided; the special-shaped jet pipe structure of the aircraft engine, which is light in weight and meets the strength requirement, is obtained by adopting a pull rod structure and using smaller weight cost and smaller pneumatic loss.

(2) According to the invention, the front flange reinforcing edge, the rear flange reinforcing edge and the split flange reinforcing edge play a connecting role, and simultaneously, after the left pipe body and the right pipe body are assembled, the front flange reinforcing edge, the rear flange reinforcing edge and the split flange reinforcing edge form a frame structure, so that the rigidity of the special-shaped spray pipe is further effectively improved.

(3) The body is the dysmorphism structure, adopts for split type structure to divide into left body and right body, reduces the processing degree of difficulty, the special-shaped structure contour machining of being convenient for.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of a split type special-shaped nozzle with a tie-bar reinforcing structure according to the present invention;

FIG. 2 is a schematic structural view of a left pipe body of the split type special-shaped nozzle with the pull rod reinforcing structure according to the present invention;

FIG. 3 is a schematic structural view of a right pipe body of the split type special-shaped nozzle with the tie-bar reinforcing structure according to the present invention;

description of reference numerals: 10-a tube body; 101-a left tube body; 102-a right tube body; 20-split flange reinforcing edges; 30-a front flange reinforcing edge; 40-a rear flange reinforcing edge; 50-a pull rod; 60-backing plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

As shown in fig. 1 to 3, a split type special-shaped nozzle with a tie-bar reinforcing structure comprises a tube body 10, wherein the tube body 10 is in the shape of: along Z axle positive direction, the cross-sectional shape is from oval gradual transition for falling trapezoidal, is provided with four pull rods 50 in the inside of body 10, the upper end of pull rod 50 is connected with the upper wall of body 10, and the lower extreme is connected with the lower wall of body 10, the diameter of pull rod 50 is phi 4mm ~ phi 16 mm. If the diameter of the pull rod 50 is less than phi 4mm, the requirement on strength cannot be met, and if the diameter is greater than phi 16mm, the ventilation area of the spray pipe is reduced, and the flow direction of air flow is influenced.

In this embodiment, the pipe 10 is a split structure, and includes a left pipe 101 and a right pipe 102 symmetrically disposed along a YZ plane, opposite edges of the left pipe 101 and the right pipe 102 are respectively provided with a split flange reinforcing edge 20, the left pipe 101 and the right pipe 102 are connected by the split flange reinforcing edges 20, the split flange reinforcing edges 20 are connected by bolts or rivets, and a sealing strip is disposed between the split flange reinforcing edges 20.

In the present embodiment, four tie rods 50 are respectively disposed at the intersection positions of 60mm on both sides of the YZ symmetry plane and the trisection cross section along the Z direction in the pipe 10, two of which are disposed on the left pipe 101, and the other two of which are disposed on the right pipe 102.

In this embodiment, a front flange reinforcing rim 30 is provided at the front end of the pipe body 10, and a rear flange reinforcing rim 40 is provided at the rear end of the pipe body 10; one end of the split flange reinforcing rim 20 is connected to the front flange reinforcing rim 30, and the other end is connected to the rear flange reinforcing rim 40. The front flange reinforcing edge 30 and the rear flange reinforcing edge 40 are connected with the pipe body 10 in a welding mode; the split flange reinforcing edges 20 are respectively connected with the left pipe body 101 and the right pipe body 102 in a welding mode.

In this embodiment, a pad 60 is provided at a position where the pipe body 10 is connected to the tension rod 50, and the pad 60 is welded on the outer surface of the pipe body 10. The two ends of the pull rod 50 respectively extend out of the outer surface of the backing plate 60 and are welded with the backing plate 60.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.