Check patentability & draft patents in minutes with Patsnap Eureka AI!

Ducts and Duct Components for Helicopters

A technology for helicopters and ducts, applied in the field of duct components, can solve the problems of low aerodynamic efficiency of ducts, achieve the effects of reducing redundant weight, optimizing design, and improving aerodynamic performance

Active Publication Date: 2017-08-25
珠海隆华直升机科技有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the parameter selection in the current duct design process is too simple, resulting in low aerodynamic efficiency of the duct, and there is still a huge room for improvement

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ducts and Duct Components for Helicopters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0017] A duct for a helicopter according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Such as figure 1 As shown, a duct for a helicopter according to an embodiment of the present invention includes: a duct cylinder.

[0019] Specifically, the duct cylinder is configured by an expansion section 11 with a right-angled trapezoidal cross-section and a lip section 12 with a semicircular cross-section located on the expansion section 11 .

[0020] Th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention proposes a duct for a helicopter and a duct assembly, including: a duct cylinder, the duct cylinder is configured by an expansion section with a right-angled trapezoidal cross section and a The lip section is a semicircle, the upper base of the right-angled trapezoid is longer than the lower base of the right-angled trapezoid, the right-angled side of the right-angled trapezoid is located on the outer periphery of the duct cylinder, and the expansion section The upper surface coincides with the lower surface of the lip section; where the minimum diameter of the expansion section is Dt, and the expansion angle of the expansion section is θd, then the height of the duct cylinder is Cs=0.6 Dt, the radius of the section of the lip section rlip=0.075Dt. According to the duct used for helicopters in the embodiment of the present invention, the key parameters of the duct are optimally designed, which can greatly improve the aerodynamic performance of the tail rotor of the helicopter and reduce the redundant weight caused by using the duct.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular to a duct for a helicopter and a duct assembly having the duct for a helicopter. Background technique [0002] Helicopter ducted tail rotor technology is one of the effective measures to solve the noise of helicopter tail rotor and improve safety. At the same time, an excellent duct design can also improve the aerodynamic efficiency of the tail rotor to compensate for the extra weight brought by the duct itself. However, the selection of parameters in the current duct design process is too simple, resulting in low aerodynamic efficiency of the duct, and there is still a huge room for improvement. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. [0004] To this end, an object of the present invention is to propose a duct for a helicopter. [0005] Another object of the present...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B64C27/04
Inventor 王浩文刘峰张玉文姜辰
Owner 珠海隆华直升机科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com