Method for realizing pressure P-displacement characteristic of bellows vacuum capsule

A technology of vacuum bellows and bellows, applied in the direction of elastic deformation gauge type fluid pressure measurement, etc., can solve problems such as lack of

Pending Publication Date: 2019-07-16
CHENGDU KAITIAN ELECTRONICS
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pressure P-displacement W characteristics required by the current design of the welded bellows vacuum bellows adopts an empirical method, that is, the size and structure of the vacuum bellows with the existing pressure P-displacement W characteristics are compared, and the parameters of the welded bellows with close dimensions are adjusted. The performance obtai

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
  • Method for realizing pressure P-displacement characteristic of bellows vacuum capsule
  • Method for realizing pressure P-displacement characteristic of bellows vacuum capsule
  • Method for realizing pressure P-displacement characteristic of bellows vacuum capsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] refer to figure 1 , figure 2 . According to the present invention, with a single welded bellows as the elastic sensitive element, through K` P =P / W, convert the pressure P-displacement W characteristic required by the vacuum bellows into the uniform force stiffness K` of the vacuum bellows P , determine the material and elastic modulus E, and according to the external dimensions that the vacuum bellows needs to meet, design the outer circle radius R of the wave plate and the radius r of the inner hole of the wave plate, and preliminarily give and try to calculate the thickness h of the wave plate and the wave number Value n, wave height value H, determine wave depth coefficient k by k=R / r, by k 1 =H / h determines the wave height coefficient k 1 , check and other arc-shaped bellows f 0 , Graph to obtain dimensionless stiffness Dimensionless effective area f 0 ,Depend on Calculation of the effective area A of the welded bellows vacuum bellows 0 , by K f = π...

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

PropertyMeasurementUnit
Circle radiusaaaaaaaaaa
Radiusaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for realizing the pressure P-displacement characteristic of a bellows vacuum capsule, and aims to provide a method for realizing the pressure P-displacement characteristic of the bellows vacuum capsule, which has high structural strength and reliability and is suitable for higher environment working temperature. The invention is realized by the following technicalscheme: a single welding bellows is used as an elastic sensitive element, the pressure P-displacement W characteristic required by the vacuum capsule is converted into the uniform distribution force rigidity K'P of the vacuum capsule, the material and the elastic modulus E are determined, a dimensionless effective area is obtained, the effective area of the welding bellows vacuum capsule and the concentrated force rigidity of the welding bellows are calculated, and compared with the concentrated force rigidity of the welding bellows, the design of the welding bellows vacuum capsule is checkedto judge whether the pressure P-displacement W characteristic requirement of the vacuum capsule of the valve is met, and otherwise, according to the difference of the concentrated force rigidity Kf ofthe welding bellows vacuum capsule, the values of the wave plate thickness H, the wave number n and the wave height H are adjusted, and the calculation is redesigned.

Description

technical field [0001] The invention relates to a valve vacuum bellows applied to aircraft engine regulators, in particular to a method for realizing the pressure P-displacement W characteristic of the vacuum bellows and high-altitude valve vacuum bellows with certain internal specific structures by using welded bellows. Background technique [0002] The fuel system is an important working system of the engine. Whether it works normally will directly affect the reliability and safety of the engine and the helicopter. As the core accessory of the fuel system, the fuel regulator is the most basic flow regulator that directly regulates the fuel flow to the combustion chamber, and it is a mechanism that realizes the adjustment of the fuel supply in various states of the engine to reasonably match the working state of the engine . It is also an area with a high incidence of failure. Fuel delivery of an aeroengine fuel flow regulator under failure modes of bellows aging and vari...

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
IPC IPC(8): G01L7/10
CPCG01L7/10
Inventor 穆强
Owner CHENGDU KAITIAN ELECTRONICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap