The device comprises a shielded outer cylinder (2), a shaft member (3) installed pivotally within, the cylinder (2), fins (4, 5) either of which are connected with the cylinder (2) or the shaft member (3) by means of base ends (4a, 5a) with edge ends (4b, 5b) thereof being slide contacted onto the other, and a fluid material (6) filled within the outer cylinder (2), wherein the outer cylinder (2) or the shaft member (3) is connected with a stationary member or a rotary member.