JPS6019997Y2 - Rotary diffuser type centrifugal blower - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotary diffuser type centrifugal blower.

Conventionally, in this kind of rotary diffuser type centrifugal blower, as shown in FIGS. 3 and 4, the side plate portion 5a exists at the suction port 8 of the impeller 2, and therefore contains highly adhesive dust at a high concentration. When gas is handled, the dust is subjected to centrifugal force, and as shown by diagonal lines in FIG.
It often adheres and accumulates on the inner circumferential surface, disrupting the rotational balance of the impeller 2 and causing vibrations, and also causes problems such as a decrease in air blowing efficiency.

As a measure to solve this problem, water was also injected to prevent the adhesion and accumulation of dust, but this conventional method could not be used in cases where mixing of moisture into the handled gas was avoided.

In the above case, when dust accumulated, the operation of the blower was stopped and the dust was scraped off manually.

In order to solve the above-mentioned conventional problems, the present invention was developed by focusing on the fact that it is sufficient to remove the side plate part of the suction port where impeller dust tends to adhere, thereby improving the rotational balance of the impeller. The purpose is to completely eliminate the adhesion of dust that causes vibrations.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is an inlet bell mouth fixed to a suction part of a housing (not shown).

Reference numeral 2 denotes an impeller, which is composed of a main plate 3, blades 4, side plates 5, and a boss 6. The impeller 2 is attached to a shaft 7 at the boss 6 and is disposed within the spiral chamber of the housing.

A suction port 8 is provided at the inlet of the impeller 2, and a diffuser 9 is provided at the outlet.

In the present invention, in such a rotary diffuser type blower, the blade portion 4a of the suction port 8 of the impeller 2 is attached to the side plate 5.
It is characterized in that the exposed blade portion 4a is covered with the extending portion 1a of the fixed side inlet bell mouth 1.

According to this configuration, the side plate portion 5a of the suction port 8 is eliminated and the extension portion 1a of the fixed side inlet bell mouth 1 having the same function is provided, so that the impeller is driven by the drive device via the shaft 7. 2 is rotated, the dust-containing gas can be sucked in from the inlet bell mouth 1 and sent through the diffuser 9 to the volute chamber and pumped under pressure, as in the conventional case.

Further, since there is no side plate portion 5a on the suction port 8 of the impeller 2 to which dust adheres, the dust contained in the gas does not adhere to the impeller 2.

Therefore, according to the present invention, even when applied to gas containing highly adhesive dust, since the dust does not adhere to the impeller, the rotational balance is not disturbed, and stable continuous operation can be performed.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the main parts of the centrifugal blower of the present invention, Figure 2
The figure is a perspective view showing an impeller of the same centrifugal blower. FIG. 3 is a sectional view showing the main parts of the conventional centrifugal blower, and FIG. 4 is a perspective view showing the impeller of the centrifugal blower. 1... Inlet bell mouth, 2...
Impeller, 3...Main plate, 4...Blade, 4
a...Blade part, 5...Side plate, 5a.
...Side plate part, 6...Boss, 7...
・・Shaft, end・・Suction port, 9・・・Diffuser.

Claims (1)

[Scope of utility model registration request] A feature of the rotary diffuser type centrifugal blower is that the blade portion 4a of the suction port 8 of the impeller 2 is exposed from the side plate 5, and the exposed blade portion 4a is covered with the extending portion 1a of the fixed side inlet bell mouth 1. Rotary diffuser type centrifugal blower.