CN213921458U

CN213921458U - High-pneumatic-performance ducted propeller structure

Info

Publication number: CN213921458U
Application number: CN202022687579.7U
Authority: CN
Inventors: 郑伟
Original assignee: Shenyang Sitana Aviation Technology Co ltd
Current assignee: Shenyang Sitana Aviation Technology Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-08-10
Anticipated expiration: 2030-11-19

Abstract

The utility model discloses a high aerodynamic performance ducted propeller structure, which comprises a ducted ring body, a support arm, propeller blades, a protective cover and a central fixed ring; the propeller blades are fixed on the outer wall of the protective cover, a rotating shaft is arranged in the central fixing ring, and the protective cover is fixedly connected with the end part of the rotating shaft; the support arm is guide vanes, the number of the guide vanes is at least three, one end of each guide vane is fixed on the inner wall of the culvert ring body, and the other end of each guide vane is connected with the outer wall of the central fixing ring. The utility model discloses can offset the moment of torsion that the paddle produced, the tangential air current of correction production reduces thrust loss, compares in traditional isolated screw, has greatly reduced the consumption and the noise of power.

Description

High-pneumatic-performance ducted propeller structure

Technical Field

The utility model belongs to the technical field of the airport technique and specifically relates to high aerodynamic performance duct propeller structure.

Background

The ducted propeller has many advantages that the conventional aircraft does not have, such as vertical take-off and landing, hovering at fixed points in the air and the like, because the ducted propeller wraps the aerodynamic shape of the propeller. The combination of the duct and the propeller can improve the tip vortex of the propeller, the effective diameter of the propeller and the air flow of the duct become larger, and the duct can also change the slip flow state downstream of the propeller compared with the conventional propeller. Meanwhile, the lip of the duct can additionally provide tension, the pneumatic performance of the propeller system is greatly improved integrally, and the noise is greatly improved.

At present, detailed research is carried out on the bypass paddles abroad, but the bypass paddles are still lack of China. The utility model provides a duct screw can increase substantially the aerodynamic performance of screw, duct and paddle are whole all to adopt combined material to make simultaneously, the holistic intensity requirement has both been guaranteed, make screw oar point vortex improve again, the effective diameter of screw has still been increaseed, the slipstream state in screw low reaches has been improved, make holistic aerodynamic performance improve by a wide margin, duct screw has still carried out optimization and proprietary design to the aerodynamic performance of lip and oar point department and support arm simultaneously, it takes place to separate and then forms the circulation vortex to have avoided air current and protection casing, the phenomenon of the thrust loss of screw leads to the fact.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing high aerodynamic performance duct screw structure to the defect that prior art exists, can offset the moment of torsion that the paddle produced, rectify the tangential air current that produces, reduce thrust loss, compare in traditional isolated screw, greatly reduced the consumption and the noise of power.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the high-aerodynamic performance ducted propeller structure comprises a ducted ring body, support arms, propeller blades, a protective cover and a central fixing ring; the propeller blades are fixed on the outer wall of the protective cover, a rotating shaft is arranged in the central fixing ring, and the protective cover is fixedly connected with the end part of the rotating shaft;

the support arm is guide vanes, the number of the guide vanes is at least three, one end of each guide vane is fixed on the inner wall of the culvert ring body, and the other end of each guide vane is connected with the outer wall of the central fixing ring.

Furthermore, the front side edge of the guide vane is of an imitation airfoil structure, and the rear side edge of the guide vane is a sharp edge.

Further, the clearance between the tip of the propeller blade and the ducted ring is designed to be 5 mm.

Compared with the prior art, the utility model following beneficial effect has:

the ducted propeller is integrally made of composite materials, so that the strength of the system is greatly improved, and the noise problem of the propeller is avoided;

the design of the lip of the duct is optimized for multiple times through finite elements, so that the phenomenon that the thrust loss of the propeller is caused by the fact that the airflow is separated from the protective cover and then forms a circulating vortex is avoided;

the design of the support arm blades can offset the torque generated by the blades, correct the generated tangential airflow and reduce the thrust loss.

The ducted propeller can improve the tip vortex of the propeller, increase the effective diameter of the propeller, improve the slip flow state at the downstream of the propeller and greatly improve the overall aerodynamic performance.

Drawings

Fig. 1 is the structural schematic diagram of the high aerodynamic performance ducted propeller structure of the utility model.

FIG. 2 is a cross-sectional view of a mounting arm

In the figure: the self-adaptive propeller comprises a duct ring body 1, propeller blades 2, support arms 3, a central fixing ring 4, a protective cover 5, a lip 6, a front side edge 7 and a rear side edge 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 2, the present invention provides a technical solution:

the high-aerodynamic performance ducted propeller structure comprises a ducted ring body 1, support arms 3, propeller blades 2, a protective cover 5 and a central fixing ring 4; the propeller blades are fixed on the outer wall of the protective cover, a rotating shaft is arranged in the central fixing ring, and the protective cover is fixedly connected with the end part of the rotating shaft;

Furthermore, the front side edge 7 of the guide vane is of an imitation airfoil structure, and the rear side edge 8 of the guide vane is a sharp edge.

Through finite element calculation, the aerodynamic appearance of the protective cover and the mounting positions of the blades and the small support arms are perfected, and the phenomenon that the thrust loss of the propeller is caused by the fact that the airflow is separated from the protective cover and then forms a circulating vortex is avoided. Such optimization calculations will be clear to those skilled in the art.

The support arm is designed to have aerodynamic shape, chord length and torsion angle, and reduces thrust loss by correcting tangential airflow generated by the blades, namely the support arm is designed to be a guide vane, as shown in fig. 2.

the design of the lip of the duct is optimized for multiple times through finite elements, so that the phenomenon that the thrust loss of the propeller is caused by the fact that the airflow is separated from the protective cover and then forms a circulating vortex is avoided; where the design of the culvert lip is optimized multiple times by finite elements, such optimization calculations will be clear to those skilled in the art.

All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The high-aerodynamic performance ducted propeller structure comprises a ducted ring body, support arms, propeller blades, a protective cover and a central fixing ring; the propeller blades are fixed on the outer wall of the protective cover, a rotating shaft is arranged in the central fixing ring, and the protective cover is fixedly connected with the end part of the rotating shaft;

the supporting arm is provided with at least three guide vanes, one end of each guide vane is fixed on the inner wall of the culvert ring body, and the other end of each guide vane is connected with the outer wall of the central fixing ring.

2. The high aerodynamic performance ducted propeller structure of claim 1 wherein the guide vanes have a profile-like configuration on the front side and a sharp edge on the rear side.

3. The high aerodynamic performance ducted propeller structure of claim 1 or 2 wherein the propeller blade tip to ducted annulus clearance is designed to be 5 mm.