Vibration propagation suppressing apparatus

Patent metadata

Field	Value
Publication number	US-11041538-B2
Application number	US-201816636140-A
Country	US
Kind code	B2
Filing date	May 2, 2018
Priority date	Sep 28, 2017
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

In a vibration propagation suppressing apparatus, each of fluid machine elements includes: a first volume chamber; a second volume chamber coupled to the first volume chamber through an orifice; an intermediate forming the orifice; and a coupling rod. A first end portion of a first volume chamber is connected to an intermediate adjacent thereto, an intermediate of the first volume chamber is connected to the intermediate of the adjacent fluid machine element through intermediation of an elastic body, and the first volume chamber and the second volume chamber are connected to each other so as to be alternately arranged in a vibration propagation direction. A fluid machine element on a first stage has an intermediate connected to the base surface, and each of the plurality of fluid machine elements has dispersion relationships matching with each other, and has a band gap on the dispersion relationships.

First claim

The invention claimed is:

1. A vibration propagation suppressing apparatus for supporting a support target with respect to a base surface, the vibration propagation suppressing apparatus comprising:
a plurality of fluid machine elements placed between the base surface that receives a forced displacement disturbance and the support target by being coupled in series to one another in a vibration propagation direction from the base surface to the support target,
wherein each of the plurality of fluid machine elements includes:
a first volume chamber filled with a fluid and having a first volume that chances with respect to a first internal pressure variation;
a second volume chamber coupled to the first volume chamber through an orifice, filled with the fluid and having a second volume that changes with respect to a second internal pressure variation;
an intermediate section forming the orifice and having an intermediate mass; and
a coupling rod configured to couple a first end portion of the first volume chamber, the first end portion being opposite with the orifice, and a second end portion of the second volume chamber, the second end portion being opposite with the orifice, to each other,

wherein, in the plurality of fluid machine elements,
a first end portion of a first volume chamber of one fluid machine element in the plurality of fluid machine elements is connected to an intermediate section of an adjacent fluid machine element in the plurality of fluid machine elements that is adjacent to the first end portion side of the first volume chamber of the one fluid machine element, an intermediate section of the one fluid machine element is connected to the intermediate section of the adjacent fluid machine element through intermediation of an elastic body, and the first volume chamber and the second volume chamber are connected to each other so as to be alternately arranged in the vibration propagation direction,

wherein a first fluid machine element in the plurality of fluid machine elements and arranged has an intermediate section connected to the base surface,
wherein a final fluid machine element in the plurality of fluid machine elements and arranged has a first end portion of a first volume chamber connected to the support target, and has an intermediate section connected to the support target through intermediation of an elastic body, and
wherein each of the plurality of fluid machine elements has dispersion relationships matching with each other, and has a band gap on the dispersion relationships.

2. The vibration propagation suppressing apparatus according to claim 1 ,
wherein, in each of the plurality of fluid machine elements, a pipe flow resistance value of the orifice is selected in accordance with Equation (1)
[Math. 1]

R
<

4
⁢

Lk
s

C
V

⁢

k
3

+

2
⁢

A
P
2

(
1
)

where

R
=

8
⁢

πρ
⁢
υ
⁢
1

4

:

pipe
⁢

⁢
flow
⁢

⁢
resistance
⁢

⁢
of
⁢

⁢

orifice
⁢

[

Pa
-

s
/

m
3

]

L
=

ρ1

A
o

:

equivalent
⁢

⁢
inertia
⁢

⁢
of
⁢

⁢
fluid
⁢

⁢
flowing
⁢

⁢
through
⁢

⁢

orifice
⁢

[

Pa
-

s
/

m
3

]

ρ
:

density
⁢

⁢
of
⁢

⁢

fluid
⁢

Assignees

• Mitsubishi Electric Corp

Inventors

• Yamazaki Tamon

Classifications

• F16F15/022 Primary

  using dampers and springs in combination · CPC title

• F16F9/0409 Primary

  characterised by the wall structure · CPC title

• F16F13/10

  the wall being at least in part formed by a flexible membrane or the like (F16F13/14 - F16F13/18 take precedence) · CPC title

• F16M11/22

  with approximately constant height, e.g. with constant length of column or of legs (F16M11/42 takes precedence) · CPC title

• F16M2200/08

  Foot or support base · CPC title