JPH09126128A - Enclosure of pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To block mechanical noise and fluid noise generated during operation of a pump from transmitting through a transmission pass, and to effectively reduce radial noise of the pump. SOLUTION: In an enclosure in which a pump body 1 is arranged in a cover 8, opening part 5 in which pipe lines 11, 12 connected to the pump body 1 are inserted, are sealed by elastic members 4 which creates a vibration mode having less acoustic radiation at a frequency of frequency noise generated from the pump body 1, and which have a heat transmissivity larger than that of the cover 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an enclosure used for noise prevention of a pump used for transporting air, water, etc., and provides an enclosure for insulating mechanical noise and fluid noise generated from a pump body during operation. It is something to do.

[0002]

2. Description of the Related Art Noise generated from a pump main body includes vibration of a mechanical structure and fluid noise such as impeller, cavitation and water hammer.

In order to prevent such noise, an enclosure that surrounds the pump body has been conventionally used.

However, in this type of conventional enclosure, the pump main body is installed on the bottom plate and is covered with a box-shaped cover.

[0005]

In such an enclosure, the noise and sound pressure inside the enclosure rises, the presence of solid propagating sound caused by the pump vibration directly vibrating the enclosure, heat dissipation measures for the pump, and piping. The current situation is that sufficient soundproofing (insulation) effects cannot be obtained due to noise leakage and radiation from the opening of the enclosure provided for joining, and resonance within the enclosure that occurs in the low frequency range.

The present invention has been made in view of the above points, and mechanical noise and fluid noise generated during the operation of the pump are blocked and insulated on the propagation path to effectively and effectively An enclosure is provided that reduces radiated noise.

[0007]

One of the enclosures for a pump according to the present invention is a pump enclosure in which a pump body 1 is arranged in a cover 8, and an opening for inserting a pipe 11.12 connected to the pump body 1. 5 is sealed with an elastic material 4 (which is appropriately selected by experiments or the like) that forms a vibration mode with less acoustic radiation with respect to the frequency of periodic noise generated from the pump body 1. The enclosure is a pump enclosure characterized in that the elastic material 4 has a heat permeability higher than that of the cover 8.

As the elastic member 4, a sheet of vibration-proof rubber, sponge or the like is formed and used, and the opening of the cover 8 and the pipe 1 are used.
It is generally used by pasting so as to fill the gap of 1.12.

The enclosure cover 8 is formed of a synthetic resin plate, a thin steel plate, or the like. Therefore, in consideration of this, the material of the elastic material 4 is determined to have a smaller heat permeability.

In the pump enclosure according to the present invention, therefore, the opening through which the pipe 11.12 connected to the pump main body 1 is inserted has less acoustic radiation with respect to the frequency of the periodic noise generated from the pump main body 1. By sealing with the elastic material 4 that forms the vibration mode, the noise generated by the pump body 1 is blocked on its propagation path.

[0011]

Embodiments of the present invention will be described below.

FIG. 1 shows one embodiment of the present invention, in which a pump is installed on a slab as a base 7.

This pump comprises a pump body 1 and an enclosure 9. The enclosure 9 includes a bottom plate 2 and a cover 8.

The pump body 1 has a water supply pipe 11 as a pipe.
And a water supply pipe 12 are connected to each other, and each penetrates through the opening 5 of the cover 8 of the enclosure 9 and is led out to the outside.

The enclosure 9 has a substantially rectangular bottom plate 2 on which the pump body 1 is mounted, and the pump body 1 and the bottom plate 2.
It consists of a box-shaped cover 8 that covers the entire body. The opening 5 is
The cover 8 is formed by forming a notch in the lower portion.

The bottom plate 2 is bent downward at its periphery to form a wall leg 14, and when installed on the base 7, a space 15 is formed on the lower surface side of the bottom plate 2.

The lower end of the peripheral wall of the cover 9 is directly mounted and fixed on the periphery of the bottom plate 2. The pump body 1 is provided with a pump support leg 3 made of an elastic material at the lower end.

Since the pump body 1 is a diaphragm type, as shown in the graph of FIG. 2 (a), the noise caused by electromagnetic action is radiated at 60 and 120 Hz, and the noise caused by pressure pulsation is radiated at 170 Hz. And, each periodic noise is dominant in the broadband noise component. Here, in FIG. 2A, the horizontal axis represents frequency and the vertical axis represents noise level. Therefore, the pipe 11.1 connected to the pump body 1
An opening 13 through which 2 is inserted is sealed with an elastic material 4 that forms a vibration mode with less acoustic emission with respect to the frequency of the periodic noise generated from the pump body 1. Specifically, a silicone rubber sheet is used as the elastic material 4, and the piping 11.1
The gap between 2 and the opening 5 through which this is inserted is sealed.
FIG. 2B shows a vibration mode of this elastic material 4,
The vibration level at 60, 120.170 Hz is small.

As is clear from the above description and FIGS. 2A and 2B, the acoustic power of the periodic noise radiated from the opening 5 of the enclosure 9 is gradually reduced.

Since the elastic material 4 for sealing the opening 5 of the enclosure 9 has a smaller heat permeability than that of the cover 8, it does not affect the heat dissipation of the pump.

[0021]

As described above, the pump enclosure according to the present invention includes the pipe 11.
Since the opening 13 through which 12 is inserted is sealed with the elastic member 4 that forms a vibration mode with less acoustic radiation with respect to the frequency of the periodic noise generated from the pump body 1, the vibration generated from the pump body is prevented. It blocks and insulates along the propagation path, effectively reducing pump radiation noise.

Further, if the heat permeability of the elastic member 4 for sealing the opening 5 of the enclosure 9 is smaller than that of the cover 8, the heat radiation of the pump will not be affected.

Therefore, by using the enclosure of the present invention, discomfort caused by pump noise can be reduced,
In addition, the pump can be used without disturbing the people in the surroundings even when it is silent such as at midnight.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating one embodiment of the present invention.

FIG. 2 is a graph showing the operation of the present invention.

[Explanation of symbols]

 1 Pump Main Body 2 Bottom Plate 3 Pump Support Leg 4 Elastic Material 5 Opening 7 Base 8 Cover 9 Enclosure 11 Piping 12 Piping

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area F04B 45/04 103A

Claims (2)

[Claims] 1. A pump enclosure in which a pump main body 1 is arranged in a cover 8, and an opening 5 for inserting a pipe 11.12 connected to the pump main body 1 is provided in the pump main body 1.
An enclosure for a pump, characterized in that it is sealed with an elastic material (4) that forms a vibration mode with less acoustic radiation at the frequency of the periodic noise generated from. 2. The pump enclosure according to claim 1, wherein the elastic material 4 has a heat permeability higher than that of the cover 8.