JPS60144923A - Condenser unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a capacitor device.

In a capacitor device, multiple capacitor elements are assembled by winding a sheet-like electrical shield between pairs of foil-like electrodes to form an element block, and this is combined with insulating oil. It is known that the device is configured by being stored in a tank. It is known that in a capacitor device having such a superior configuration, KM noise is generated during energization. This noise is generated by electrostatic force caused by the voltage applied between the electrodes of the capacitor element. This electrostatic force causes the capacitor element to vibrate, which causes the element block to vibrate and is swept into the tank. The resulting vibrations in the tank vibrate the surrounding air, creating noise.

Conventionally, in order to suppress such noise, the strength of the side walls of each tank was increased, and the side walls were made with a double vacuum structure. However, either method has the disadvantage that the tank becomes larger and heavier.

An object of the present invention is to suppress noise caused by vibrations on the tank side wall by suppressing vibration propagation from the element block to the tank. - This invention is characterized by interposing a damping steel plate within the element block to suppress the propagation of vibrations from the element block to the outside due to vibrations of the capacitor element.

There are two types of split steel plates: composite type and alloy type. The composite type includes a non-constraint type that uses a damping material bonded to a steel plate and utilizes viscoelastic hysteresis caused by elongation deformation of the polymer material, and a non-constraint type that uses a viscoelastic polymer resin with high damping performance between two steel plates. There is a restraint type that utilizes viscoelastic hysteresis caused by pinching and sliding deformation of polymeric materials. The polymer materials used are:
Polymers such as acidophilic vinyl, 1:'nyl chloride, and copolymers of vinyl-ethylene or acrylic-styrene.

Thermoplastic resins such as low molecular weight polyamides and low molecular weight polyamides are generally known. In any case, when vibration is applied to the steel plate, the polymer resin layer undergoes elongation deformation or abrasion deformation, resulting in a large vibration damping effect.

In addition, as alloy type, dislocation type (Ml, Ml-Zτ)
, twin type (MW-Cu, Cu-Al-Ni
, T1Ni), etc. These can also be used according to the invention.

In either case, it is desirable that the loss coefficient is 0.05 or more.

Embodiments of the invention will be described with reference to the drawings. 1#'i capacitor elements, a plurality of which are arranged in parallel and assembled. Then, the collecting plates 2 are applied to both sides thereof, and these are tightened with the collecting metal fittings 6 to form the element body block 4. SFi
It is a bracket. This element block 4 is housed in a tank 6 together with insulating oil. It is fixed to the tank 6 by means of a fixing fitting 7. These structures are no different from conventional ones.

According to this invention, a damping copper plate 8 is interposed within the element block. In the configuration shown in FIGS. 1 and 2, the damping copper plate 8
are arranged in parallel and interposed between the outermost capacitor element of the assembled capacitor elements and the collecting plate 2. Further, in FIG. 3, the capacitor elements are further arranged in parallel and interposed between the assembled capacitor elements.

In the above configuration, when a voltage is applied to the capacitor element,
Although each capacitor element 1 vibrates, this vibration is suppressed by the damping steel plate 8. Therefore, the vibration Fi of the capacitor element 1 is not directly propagated to the collecting plate 2, but is spread in a suppressed state.

As a result, the vibration of the collecting plate 2 is reduced, so that the vibration of the side wall of the tank 6 is also reduced, and thereby the noise generated toward the outside is also reduced. According to the inventor's experiments, a restrained vibration damping steel plate with a thickness of 3.2W7 (loss coefficient of 0.1
) was used as shown in Figure 1, it was confirmed that the vibration amplitude of the tank side wall was reduced by half.

In the configuration shown in Fig. 6, if the capacitor element 1 is divided into three parts as shown in the figure, and the divided steel plate 8 is interposed between each divided block, each divided block can be used as a capacitor for each phase of a three-phase capacitor. can be used. Further, in this case, each feeding mending board 8 may be connected to ground. In addition, if the damping steel plate 8 is installed in parallel with the collection plate 2, 1
It is convenient for the steel plate 8 to be applied so as to reinforce the aggregate plate 2.

As detailed above, according to the present invention, the vibration of the capacitor element block is suppressed, and therefore the tank does not become larger or heavier.
In addition, since it is sufficient to simply insert a damping steel plate, there is no need for a compound structure.

In carrying out the present invention, in order to further reduce noise, part of the side wall of the tank, for example, the side wall facing the peripheral flat part of the cloth-shaped capacitor element, may be made into a double structure. Of course.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a front view of an element block, and FIG. 3 is a front view of an element block showing another embodiment of the invention.

Claims (1)

[Scope of Claims] (1) In a capacitor device in which a plurality of capacitor elements are assembled and tightened with metal fittings and an element block is housed in a tank, a damping steel plate is interposed in the element pull. Capacitor device (2) A damping steel plate is interposed between the assembly plate of the element block and the capacitor element.
A capacitor device (3) according to claim 1, wherein the distributed steel plate is interposed between capacitor elements.