JPS59196901A - Sealed impeller made of ceramics - Google Patents

Abstract

PURPOSE:To improve the strength of an impeller by forming such impeller by combining a main plate having blades and a side plate having a groove in the shape in conformance with that of blades. CONSTITUTION:A main plate 1 which integrally has a blade 2 and a side plate 3 which has a groove 4 in the shape in conformance with that of the blade 2 are made separately, and thereafter are joined together by embedding the blade 2 into the groove 4 with an adhesive intervening. In this manner, a sealed impeller can be manufactured with materials such as ceramics that are normally difficult to be machined, and the strength of the impeller can be improved.

Description

[Detailed description of the invention] The present invention relates to a closed ceramic impeller.

The impellers used in rotating machinery have complex shapes, and although open-type impellers can be manufactured using materials that are difficult to mold, such as ceramics, closed-type impellers are extremely difficult to mold in one piece, so they are rarely used. It has not been manufactured.

This invention provides a sealed impeller made of ceramic that is strong enough to withstand practical use.The main plate and side plate of the impeller are separate parts, and the blades are formed on one of them, and the blades are formed on the other. Cut a groove wider than the thickness of the blade according to the shape,
A blade is embedded in the groove, a ceramic adhesive is filled in the gap, and heated, so that the main plate and the side plate are integrated with the blade of either side. There is.

Referring to the drawings, FIG. 1 shows a first embodiment of the present invention, in which <A) shows a side plate 6 and @) a main plate 1 having a blade 2. As shown in FIG. As shown in (door), a groove 4 matching the shape of the blade 2 is cut in the side plate 6. (Q shows the main plate 10 blades 2 combined with the grooves 4 and the impeller 5 assembled. Q) shows a cutaway view of the impeller along the blades,
The relationship among the main plate 1, the blades 2 attached to the main plate, the side plates 6, and the grooves 4 cut in the side plates is shown.

FIG. 2 shows another embodiment, in which the slope shows the side plate 6 having the blades 2, and (B) shows the main plate 1. The main plate 1 has a groove 4 cut in the same shape as the blade 2. be.

(C) shows an impeller 5 in which blades 2 are combined with grooves 4.

(D) shows a diagram in which the impeller 5 is cut along the blades, and shows the relationship among the main plate 1, the blades 2, the side plate 6 having the blades, and the groove 4 in the main plate.

Figure 6 shows the relationship between the blade, groove, and adhesive, and (A)
indicates where the blade is separated from the groove, 0 indicates where the blade is embedded in the groove, and blade 2 indicates where the blade is located in the main plate 1 (or side plate 3).
), and the opposite plate 6 (or 1) is cut with a groove 4 having a width T slightly larger than the wall thickness t of the blade.

The blades are then assembled into the grooves, and the gaps are filled with ceramic adhesive 6. The assembly is then heated to cure the adhesive and form a sealed impeller.

FIG. 4 shows another example of the relationship between the blade 2 and the groove 4, (
In the example shown in Figure 4, the tip of the blade 2 with a wall thickness t is a slightly thicker part 21 at t', and the width of the groove 4 is slightly larger than t'. Let it be T.

As shown in (c), combine the tip 21 of the blade 2 with the groove 4,
Adhesive 6 is filled into the gap and cured by heating. Note that since the connecting portion 22 between the tip 21 and other parts of the blade 2 is rounded, the stress applied thereto is reduced. Also, since the thickness of the tip is increased, the bonding area is large and the bonding strength is increased.

The present invention has such a structure, and the impeller is composed of a main plate and a side, and has blades on one side and grooves on the other side. into the grooves, fill with adhesive, harden, and attach the main plate.
This is achieved by combining the side plates and blades into one piece.

[Brief explanation of drawings]

Figure 1(c) is a perspective view of the side plate, Figure 1(c) is a perspective view of the main plate with blades, Figure 1(c) is a perspective view of the assembled impeller, and Figure 1) is a perspective view of the 1100th blade. Figure 2 (8) is a perspective view of the side plate with blades, Figure 2 (8) is a perspective view of the main plate, Figure 2 υ is a perspective view of the assembled impeller, Figure 2 ) is a cross-sectional view along the blade in Figure 2 (G), Figure 6 (~ is a diagram showing where the blade and groove are separated, and Figure 3 (B) is a view where the blade and groove are glued together. Figure 4 (A) is a diagram showing where the blade and groove of Example 7 are separated (1), and Figure 4 (B) is a diagram showing where the blade and groove are bonded together. Explanation of symbols 1...Main plate, 2...Blade, 6...Side plate, 4...
Groove, 5... Impeller, 6... Adhesive, 21... Tip, (3 others) Figure 1 Figure 2 Figure 3 (A) (B) Figure 4 (A) ( B)

Claims (2)

[Claims] (1) In a ceramic sealed impeller, each impeller consists of a separate main plate and side plates, one of which has an integral blade, and the other plate has a blade wall that matches the blade shape. A groove with a width slightly larger than the thickness is cut, a blade is embedded in the groove, and by filling the gap with ceramic adhesive and heating it, the main plate and the side plate can be attached to either side. A sealed ceramic impeller characterized by the fact that both the blades and the blades are integrated. (2) The ceramic sealed impeller according to claim 1, wherein the bonded portion of the blade that engages with the groove is thicker than the wall thickness of the blade.