JPH044544U

JPH044544U -

Info

Publication number: JPH044544U
Application number: JP4546790U
Authority: JP
Priority date: 1990-04-26
Filing date: 1990-04-26
Publication date: 1992-01-16

Description

[Brief explanation of the drawing]

第１図〜第７図はこの考案を具体化した第１実
施例の図面であつて、第１図は防振装置を示す側
断面図、第２図はオリフイスの部分を拡大して示
す正断面図、第３図は同じくオリフイスの部分を
拡大して示す平断面図、第４図及び第５図はオリ
フイスの部分の一連の作用を説明する正断面図、
第６図はコンピユータが実行する抵抗値制御の処
理を説明するフローチヤート、第７図はオリフイ
スにおける磁界強度に対する発生差圧の違いを説
明する図である。第８図はこの考案を具体化した
第２実施例におけるオリフイスの部分を拡大して
示す正断面図、第９図はこの考案を具体化した第
３実施例におけるオリフイスの部分を拡大して示
す正断面図である。第１０図は従来例における防
振装置の示す側断面図、第１１図は同じく従来例
におけるオリフイスの部分の作用を説明する正断
面図である。図中、１……マウント容器、１１，１２……室
、１３……オリフイス、１４……磁性流体、１４
ａ……微粉、１５……第１ヨーク、１６……第２
ヨーク、１７……第１電磁コイル、１８……第２
電磁コイル（１５，１７及び１６，１８はそれぞ
れ電磁石を構成している）、３１，３３〜３９…
…ヨーク、３２，４０……電磁コイル（３１，３
２及び３３〜４０はそれぞれ電磁石を構成してい
る）である。 Figures 1 to 7 are drawings of a first embodiment embodying this invention, in which Figure 1 is a side sectional view showing the vibration isolator, and Figure 2 is an enlarged view of the orifice. A sectional view, FIG. 3 is a plan sectional view showing an enlarged view of the orifice portion, and FIGS. 4 and 5 are front sectional views illustrating a series of actions of the orifice portion.
FIG. 6 is a flowchart illustrating the resistance value control process executed by the computer, and FIG. 7 is a diagram illustrating the difference in the differential pressure generated with respect to the magnetic field strength in the orifice. FIG. 8 is a front sectional view showing an enlarged orifice portion in a second embodiment embodying this invention, and FIG. 9 is an enlarged front sectional view showing an orifice portion in a third embodiment embodying this invention. FIG. FIG. 10 is a side sectional view showing a vibration isolator in a conventional example, and FIG. 11 is a front sectional view illustrating the action of an orifice portion in the conventional example. In the figure, 1...mount container, 11, 12...chamber, 13...orifice, 14...magnetic fluid, 14
a... Fine powder, 15... First yoke, 16... Second
Yoke, 17...first electromagnetic coil, 18...second
Electromagnetic coils (15, 17 and 16, 18 each constitute an electromagnet), 31, 33 to 39...
... Yoke, 32, 40 ... Electromagnetic coil (31, 3
2 and 33 to 40 each constitute an electromagnet).

Claims

[Claims for Utility Model Registration] An orifice provided between two adjacent chambers inside a container filled with magnetic fluid, and an electromagnet that applies a magnetic field to the orifice, and by controlling energization of the electromagnet. In the magnetic fluid type vibration damping device, the magnetic fluid is aggregated in the orifice to provide flow resistance, wherein the electromagnet is provided to aggregate the magnetic fluid sequentially from the middle part to both ends of the orifice. A magnetic fluid type vibration isolator characterized by: