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Linear and Non-Linear Integrated Ducting Gimbal

IP.com Disclosure Number: IPCOM000234780D
Publication Date: 2014-Feb-05
Document File: 4 page(s) / 1M

Publishing Venue

The IP.com Prior Art Database

Related People

Shawn Alstad: INVENTOR

Abstract

Piping used in areas such as aircraft duct systems requires flexible joints so as to transfer high and/ or low pressure air from the engine to other parts of the aircraft. Gimbals are required to absorb angular rotation in any plane between inlet and exit of high pressure/ temperature fluid without any leakage. The present gimbals are prone to choking the inner flow path of the fluid and their outer diameters are larger than what can be easily accommodated in many applications. The proposed gimbal design keeps the outside diameter at a minimum without choking the inner flow path. Further, the proposed gimbal design system allows the gimbal to exist in a straight or curved section of ducting. Furthermore, the proposed gimbal costs much less than the existing Gimbals.

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Linear and Non-Linear Integrated Ducting Gimbal

Shawn Alstad ABSTRACT

Piping used in areas such as aircraft duct systems requires flexible joints so as to transfer high and/ or low pressure air from the engine to other parts of the aircraft. Gimbals are required to absorb angular rotation in any plane between inlet and exit of high pressure/ temperature fluid without any leakage. The present gimbals are prone to choking the inner flow path of the fluid and their outer diameters are larger than what can be easily accommodated in many applications. The proposed gimbal design keeps the outside diameter at a minimum without choking the inner flow path. Further, the proposed gimbal design system allows the gimbal to exist in a straight or curved section of ducting. Furthermore, the proposed gimbal costs much less than the existing Gimbals.


1. Introduction

A jet engine comprises of a duct system that is used to transfer high/ low pressure air from the engine to other parts of the aircraft. In the industry this ducting system is referred as customer bleeds, environmental control supply, or engine bleeds. The air in the duct is used to power various pneumatic valves and controls. For example, it can power control valves that run heat exchangers, or even power the HVAC system inside the cabin. Currently, these Air Handling Systems use gimbals to allow motion essentially between the inlet and exit of a ducting system while preventing high pressure and/ or high temperature air from leaking.

The most important design consideration that goes into a gimbal design is to maximize the inner gimbal diameter while minimizing the outside diameter. The above design consideration is important to maximize the clearance to other components and to


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prevent flow and performance losses. The utility of already existing gimbal's is limited because they are heavy and are highly expensive.

Figure 1: Already Existing Universal Gimbal Joint

As shown in FIG. 1, the already existing Gimbal joints have a number of components such as flanges, pins, sliding that make the existing Gimbals bulky and expensive. Also, in order to reduce the bulkiness the design might have to compromise on inner diameter, making it narrower. Hence, there is a need of a gimbal system that is economical and is not bulky.


2. Solution

The proposed gimbal design of...