JP4364518B2 - Pump impeller - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pump impeller.
[0002]
[Prior art]
As is well known, a pump impeller has conventionally been provided with a recess that is countersunk by drilling shallowly with a drill or by cutting it into a concave groove, etc., at the plate surface of a rotating disk (shroud). Therefore, the weight balance is generally adjusted (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP 2002-202092 A (page 4, column 5, lines 13-15, Fig. 3-4)
[0004]
[Problems to be solved by the invention]
Since the hollowed-out recess as seen in Patent Document 1 becomes a cause of occurrence of accumulation, abnormal wear, vibration, noise, and the like due to entanglement of foreign matter during rotation as it is, it is blocked by resin filling and filled with resin. It is common practice to scrape off the swell of the resin so that the surface becomes flat after curing, but it takes time to harden the filled resin as well as these operations. The workability is extremely poor.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a pump impeller that solves the above-described problems and does not require resin filling in a recessed recess.
[0006]
[Means for solving problems]
In an impeller for a pump in which an annular recess is formed on an end face of a rotating disk (shroud) according to the present invention and a flat concave surface is held, the pump impeller is seated on the concave surface to adjust the weight balance of the impeller. The annular masking plate is overlapped with the concave surface so that the end face of the rotating disk (shroud) is flush with the annular recess so as to close the recess, and the masking plate is fitted and closed in the annular recess. The peripheral part of the pump is fixed on the concave surface by screws , and foreign matter is prevented from accumulating in the annular recess during pump rotation, thereby providing a pump impeller that prevents abnormal wear, vibration, and noise .
[0007]
【Example】
This will be described below with reference to the embodiment shown in FIGS.
[0008]
1 is a rotating disk (shroud), 2... 2 is a blade, 3 is an impeller boss part having a shaft hole 4 provided vertically in the center, and 5... 5 are annular recesses on the end surface of the rotating disk (shroud). It is a recess that is seated on a flat concave surface, and the weight balance of the impeller is adjusted by, for example, drilling shallowly with a drill or cutting into a fan-shaped concave groove shape. . Reference numeral 6 denotes a masking plate which is formed in an annular shape so as to be closed and fitted into an annular recess so that the end surface of the rotating disk (shroud) 1 is flush with the concave surface. It is fixed by screwing or the like in the closed state.
[0009]
If the recesses 5... 5 are provided on the concave surface of the upper rotating disk, they are fixed to the concave surface of the upper rotating disk, and the recesses 5... 5 are provided on the concave surface of the lower rotating disk. If it is present, it is fixed to the concave surface of the lower rotating disk, and the recesses 5 and 5 are respectively provided on the concave surface of the upper rotating disk and the concave surface of the lower rotating disk as in the embodiment of FIG. If it is, the masking plate 6 is fixed to the concave surface of the upper rotating disk and the concave surface of the lower rotating disk, respectively. 7... 7 are screws for fixing the masking plate 6.
[0010]
【The invention's effect】
According to the impeller for a pump of the present invention, the filling of the resin into the recess seated on the concave surface of the rotating disk (shroud) and the swell after the filling are scraped off become unnecessary.
[0011]
Furthermore, when the impeller in which the upper surface of the rotating disk (shroud) is inevitably formed in a deep annular recess due to structural characteristics, such as a non-clog type impeller, the above-mentioned setting is performed. Since the deep annular recess is also closed simultaneously with the closing of the recess, a secondary effect of preventing the accumulation of foreign matters in the deep annular recess is also produced.
[Brief description of the drawings]
FIG. 1 is a plan view of a pump impeller according to the present invention.
FIG. 2 is a longitudinal side view of a pump impeller according to the present invention.
[Explanation of symbols]
1 Rotating disc (shroud)
5 Recessed seat 6 Recessed masking plate

Claims (1)

In an impeller for a pump, in which an annular recess is formed on the end surface of the rotating disk (shroud) and a flat concave surface is retained, the recess seated on the concave surface is closed to adjust the weight balance of the impeller. As described above, the peripheral portion of the masking plate is screwed in a state where the annular masking plate is overlapped with the concave surface so that the end surface of the rotating disk (shroud) is flush and is fitted and closed in the annular recess. A pump impeller characterized in that it is fixed on the concave surface by a stop , prevents foreign matter from accumulating in the annular recess during pump rotation, and prevents abnormal wear, vibration and noise .

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