Pipe support structure

Patent metadata

Field	Value
Publication number	US-9851023-B2
Application number	US-201414513786-A
Country	US
Kind code	B2
Filing date	Oct 14, 2014
Priority date	Oct 1, 2010
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A pipe support structure which is constructed to utilize the Coriolis force and the reaction force caused, thereby making it possible to suppress the hose compliance amount in the high temperature area while maintaining the degree of freedom of mountability specific for the resin pipe and to realize the above suppressing effect by the simple construction and at a low cost.

First claim

The invention claimed is:

1. A method for assembling a pipe support structure for supporting a pipe supported at a first clamp position and a second clamp position, the pipe having a fluid passage formed therein to allow a fluid at a high temperature to pass therethrough, and made of a resilient material, the pipe support structure including a retaining member for resiliently retaining the outer peripheral portion at, at least one of the first clamp position and the second clamp position, the pipe having an inclined portion inclined with respect to a horizontal plane perpendicular to the gravity direction, and a bent portion having a predetermined radius of curvature, the inclined portion and the bent portion being disposed between the first clamp position and the second clamp position, wherein the retaining member has a predetermined spring constant and a predetermined attenuation coefficient, the pipe is subjected to a Coriolis force and having a heat expansion amount caused by the Coriolis force when the fluid passage allows the fluid at the high temperature, and the retaining member having a reaction force acting against the Coriolis force, the method comprising:
providing the retaining member, which is set to have such the spring constant and such the attenuation coefficient, at such a position of at least one of the first clamp position and the second clamp position and providing the bent portion having such a shape such that the reaction force of the retaining member generated in response to the Coriolis force generated on the pipe acts to suppress the heat expansion amount caused by the Coriolis force from being increased when the fluid passage allows the fluid at the high temperature, wherein:
when the Coriolis force is represented by F c , the fluid angular speed of the fluid passing through the fluid passage is represented by ω , and the time is represented by t, the Coriolis coercive force f c temporally varying in response to the vibration of the pipe is given by f c (t)=F c sin ωt,
when the reaction force caused on the retaining member against the Coriolis force F c is represented by F r , and the clamp reaction force caused on the retaining member and temporally varying in response to the Coriolis coercive force f c (t) is represented by f r (t), the clamp reaction force f r (t) is given by f r (t)=Fr sin(ω−φ), and
when the coefficient to be determined in response to the ratio of the clamp reaction force f r (t) with respect to the Coriolis coercive force f c (t) is “k”, the first clamp position, the second clamp position, the shape of the bent portion, the spring constant, and the attenuation coefficient are set to have the coefficient “k” in the following equation (1) approach the number of 1
f c ( t )=− kf r ( t )  (1).

2. The method as set forth in claim 1 , in which when the fluid mass of the fluid passing through the fluid passage between the first clamp position and the second clamp position is represented by “m”, and the fluid speed passing through the fluid passage is represented by “V”, the Coriolis force is given by the following equation (2),
F c =2m ωV  (2)

when the fluid density of the fluid is represented by “ρ”, the fluid speed passing through the fluid passage between the first clamp position and the second clamp position is represented by “v”, and the radius of curvature of the bent portion is represented by “r”, the fluid mass “m” and the fluid angular speed w in the above equation (2) are given by the following equations (3) and (4), respectively,

m
=

ρ
·
v

(
3
)

ω
=

V
r

(
4
)

adjusting at least one of the first clamp position and the second clamp position, and adjusting the fluid mass “m” indicated in the above equation (3) to adjust the Coriolis force F c indicative of the amplitude of vibration in the above Coriolis coercive force f c (t), and
adjusting the radius of curvature “r” of the bent portion to adjust the fluid anular speed ω.

3. The method as set forth in claim 1 , in which
when the inherent vibration number of the retaining member is represented by ω n , the damping ratio is represented by ζ, and the spring constant is represented by “k”, the reaction force F r and the phase difference φ indicative of the amplitude in the clamp reaction force f r (t) are given by the following equations (5) and (6),

F
r

=

F
c

/
k

{

1
-

(

ω

ω
n

)

2

}

2

+

(

2
⁢
ζ
⁢

ω

ω
n

)

2

(
5
)

ϕ
=

tan

-
1

Assignees

• Miki Hironori
• Toyota Motor Co Ltd

Inventors

• Miki Hironori

Classifications

• Y10T29/49959

  Nonresilient fastener · CPC title

• F16L11/08

  with reinforcements embedded in the wall (F16L11/11 takes precedence) · CPC title

• F16L3/16 Primary

  with special provision allowing movement of the pipe (F16L3/01 takes precedence; supporting pipes or cables inside other pipes or sleeves F16L7/00) · CPC title

• F16L55/035 Primary

  in the form of specially adapted hangers or supports · CPC title

• F16D2048/0224

  Details of conduits, connectors or the adaptors therefor specially adapted for clutch control · CPC title