JP2532688Y2 - Steel plate base for pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a pump for fixing a support driven by a prime mover, mounting a pump integrated with the prime mover, and reducing noise caused by vibration generated by the prime mover and the pump. Related to steel plate base.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional steel plate base of this type is formed by bending or drawing a steel plate. In the figure, reference numeral 10 denotes a conventional steel plate base, 11 denotes a bent portion, 12 denotes a mounting hole, and the surface of the steel base is constituted by a single plane as shown in the figure. In such a conventional configuration base, vibrations generated by a prime mover or a pump supported on the steel plate base 10 are transmitted to the support portion of the pump and concentrated at a specific portion of the steel base. However, it has a drawback that it becomes a noise source and generates noise.

FIG. 5 shows a state of vibration on a conventional steel plate base 10, and the vibration propagates on the steel base and is concentrated at a specific location.

[0004]

According to the present invention, in order to solve the above-mentioned drawbacks, the support portion of a pump driven by a motor is fixed, and a steel plate base on which the pump is mounted is mounted on the steel plate base. A steel plate base for a pump that reduces the noise by making a hole at the point where the generated vibration is concentrated and generating a noise, thereby uniformly dispersing the vibration on the base surface and attenuating it. It is the one that got the news.

[0005]

FIG. 1 shows an embodiment of a steel plate base for a pump according to the present invention.
Has an electric motor-integrated pump 30 in which a prime mover and a pump are combined. In the figure, a motor-integrated pump 30 is indicated by a two-dot chain line, 31 denotes a pump unit, and 32 denotes a motor unit. Reference numerals 33, 33 denote legs for fixing the pump section 31 on the steel plate base 20, and 34 are columns for supporting the motor section. Reference numeral 21 indicates a bent portion.

FIG. 2 is a plan view of the steel plate base 20, and a hole 22 having a size that does not change the natural frequency of the steel plate base is formed between the legs 33, 33. Open. In this way, there is no place where the vibrations of the pump and the prime mover transmitted through the support parts such as the legs 33 and the struts 34 are concentrated on the steel plate base. No source is formed.

Further, in addition to the hole 22, a steel plate base is placed on a line (indicated by a two-dot chain line in FIG. 2) connecting the center of the hole 22 to the corner 24 on the prime mover side of the steel base 20. If the holes 23, 23 having such a size as not to change the natural frequency of the source, there will be no more vibration concentrated points as noise sources, which is effective for noise suppression. In this way, the present invention is to make a hole between the support parts so as not to change the natural frequency of the steel base, eliminate the noise source by preventing the vibration from being concentrated, and suppress the generation of noise. It does not prevent resonance between the pump and the steel plate base.

The resonance occurs because the vibration of the pump and the natural frequency of the steel plate base coincide with each other. In such a case, the natural frequency of the steel plate base may be changed. This can be easily performed by changing the thickness of the steel sheet or adding a rib to the steel sheet base. Fig. 3 shows the steel plate base 20 of the present invention with holes at locations where noise is generated.
Since the openings 23 and 23 are left open, the vibrations cannot be concentrated and are uniformly dispersed and reduced.

[0009]

[Effect of the Invention] The steel plate base for a pump according to the present invention has the above-mentioned structure. By drilling a hole at a specific portion of the base, the concentration of vibration is prevented and the generation of noise sources is eliminated. Can be suppressed, noise can be reduced without using a damping steel plate or a steel plate having a large thickness, which is generally considered to have a noise reduction effect, and cost reduction and weight reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a steel plate base of the present invention.

FIG. 2 is a plan view showing the same.

FIG. 3 is an explanatory view of a vibration state.

FIG. 4 is a view showing a conventional steel plate base.

FIG. 5 is an explanatory view of the vibration state.

[Explanation of symbols]

 10 Conventional steel plate base 11 Bend portion 12 Mounting hole 20 Steel plate base of the present invention 21 Bend portion 22 holes 23 holes 24 Base corner 30 Pump integrated with motor 31 Pump 32 Drive unit 33 Pump Legs 34 Motive column

Claims (2)

(57) [Scope of request for utility model registration] 1. A pump of a motor-integrated pump 30 driven by a motor in a steel plate base for a pump.
A pair of pump legs 33, 33 for supporting the section 31 and the motor section 32
The three supporting columns 34 that support the
In a steel plate base for a pump equipped with a pump , the natural frequency of the steel base is located between the pump legs 33 and 33.
It is characterized by having a hole 22 of a size that does not change
Steel base for pumps. 2. In the steel plate base for a pump, the hole 22 and a corner portion of a motor-side base which are flush with the hole 22 are provided.
The natural frequency of the steel base changes on the straight line connecting
It is characterized by having holes 23, 23 of a size that is not large
Steel base for pump.