JPS58137634A - Anti-vibration supporting apparatus - Google Patents

Abstract

PURPOSE:To reduce the propagation of vibration to a support bed, by interposing a damping plate between a vibrational machine and a support bed by the intermediary of spacers or vibration-damping rubber, and thereby absorbing the vibrational energy produced by the vibrational machine by the damping plate. CONSTITUTION:A damping plate 3 is interposed between a vibrational machine 1 and a support bed 2 by the intermediary of spacers 4, 4. The vibrational machine 1, the support bed 2 and the damping plate 3 are fixed together by means of bolts 5. Here, it is preferable that the damping plate 3 is made of two vibration-damping steel plates 3b bonded together by a synthetic resin 3a. With such an arrangement, the vibrational energy produced by the vibrational machine 1 can be absorbed by the damping plate 3, so that the propagation of vibration to the support bed 2 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention attempts to absorb vibrations of the equipment by sandwiching a vibration-absorbing plate between the vibrating equipment and the installation base.

Rotating machines such as engines and pumps not only generate noise themselves, but also vibrate the structures in which they are installed, which also becomes a source of noise. As a measure to block the propagation of vibrations, the machine is often mounted on a mounting stand via anti-vibration rubber. Flexible couplings are used to connect such rotating machines to other rotating machines, but relative motion between the two sides of the coupling due to vibrations often reduces the life characteristics of the coupling. Therefore, the present invention does not rely on anti-vibration rubber to isolate the vibrations of vibrating machines.

It was decided to attach it to the installation stand by inserting a vibration-damping steel plate or a steel plate with damping material (hereinafter referred to collectively as a damping plate) through a rigid spacer. In this way, by changing the vibrating machine from a so-called floating support using anti-vibration rubber to a fixed support. A spacer is sandwiched between the vibration machine 1 and the installation base 2 from both sides, and 5 is an installation bolt. The damping steel plate used for the damping plate is a commercially available product made by bonding two steel plates 5b with a synthetic resin 3a, as shown in the cross section in FIG. If this is installed as shown in FIG. 1, the vibration-damping steel plate receives the vibrations of the vibrating machine and absorbs the vibration energy, thereby reducing the propagation of vibrations to the installation base 2. A similar effect can be obtained by applying a damping material such as synthetic resin to one side of a steel plate. Considering the vertical vibration of the vibrating machine 1, the damping effect becomes particularly large when the natural frequency of the out-of-plane vibration of the damping plate 50 is placed in a resonance relationship with the above-mentioned vibration.

In FIG. 3, the spacer 4 in FIG. 1 is replaced with a vibration isolating rubber, which emphasizes the effect of vibration isolation rather than the effect on the coupling as described above.

The structure shown in FIGS. 1 and 3 has the effect of preventing the secondary solid sound caused by the air generated from the lower part of the machine to vibrate the floor of the news gathering area.

FIG. 4 shows a damping plate 3 having a large number of holes 8 in plan view, and also utilizes viscous damping due to the flow of air through the holes 8 due to vibration of the plate.

The spacer 4 is for freeing the vibration of the damping plate 3, and may be a steel block, vibration-proof rubber as described above, or a protrusion of a machine or a mounting base. Further, the vibration source is effective not only for rotating machines as described above but also for general machines that have vibrations.

[Brief explanation of drawings]

Fig. 1 is a side view of a vibration damping support device in which a damping plate is sandwiched between the vibration machine of the present invention and its installation base via a spacer, and Fig. 2 is a sectional view of a vibration damping steel plate used for the damping plate.
FIG. 3 is a side view of the spacer in FIG. 1 made of anti-vibration rubber, and FIG. 4 is a plan view of a damping plate with a large number of holes. 1. Vibration machine 2. Installation base 3, damping plate 3a synthetic resin 3b steel plate 4, spacer 4 for sandwiching the damping plate from both sides of the vibrating machine and installation base/vibration isolating rubber 8 Hole drilled in the damping plate Applicant: Mitsui Engineering & Shipbuilding Co., Ltd. Agent Shigeo Kawata

Claims (1)

[Claims] 1) A vibration isolating support device in which a damping plate is sandwiched between a vibrating device and its installation base via a spacer or vibration isolating rubber. 2) A vibration isolation support device in which a damping plate with a large number of holes is sandwiched between the vibration equipment and its installation base via a spacer or vibration isolation rubber.