JPH0272393U

JPH0272393U -

Info

Publication number: JPH0272393U
Application number: JP15133288U
Authority: JP
Priority date: 1988-11-22
Filing date: 1988-11-22
Publication date: 1990-06-01

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示した斜視図、第
２図は第１図の一部を拡大して示した斜視図、第
３図は第１図の切断線Ａ―Ａに沿う断面図、第４
図は上半分を断面で示した通常の軸流誘引通風機
の正面図、第５図は従来の技術の一例を示した斜
視図である。１……動翼本体、２……ノーズ部、３……縦溝
、４……ウエアリングノーズチツプ、５……最先
端のウエアリングノーズチツプ、６，７……凸条
、８……皿ボルト、９……ガス中の灰。 Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a perspective view showing a part of Fig. 1 on an enlarged scale, and Fig. 3 is taken along the cutting line A-A in Fig. 1. Cross section, 4th
The figure is a front view of an ordinary axial flow induced draft fan with the upper half shown in cross section, and FIG. 5 is a perspective view showing an example of the conventional technology. DESCRIPTION OF SYMBOLS 1... Moving blade body, 2... Nose part, 3... Vertical groove, 4... Wearing nose tip, 5... Cutting edge wear ring nose tip, 6, 7... Protrusion, 8... Disc. Bolt, 9...ash in the gas.

Claims

[Claims for Utility Model Registration] 1. The nose portion of the rotor blade body of an axial flow fan has a vertical groove extending from the tip to the root, and the cross-sectional shape of the nose portion is approximately Ω-shaped, and , a plurality of wear ring nose chips made of wear-resistant ceramics, each having an inner cross-sectional shape corresponding to the cross-sectional shape of the nose portion and having a protrusion on the inner side that fits into the longitudinal groove, are provided on the nose portion. The rotor blades of an axial flow fan are characterized by being installed from the root to the tip. 2. The wear ring nose chip inserted into the tip of the nose of the rotor blade body is made of a metal composite material of SUS and bolide.
The rotor blade of an axial flow fan according to claim 1, wherein the rotor blade is fixed with a countersunk bolt. 3. Only the wear ring nose tip that is inserted into the tip of the nose part of the rotor blade body is fixed with countersunk bolts, and the other wear ring nose tips are not fixed with bolts and are inserted and attached. A rotor blade for an axial flow fan according to claim 1. 4. The rotor blade for an axial flow fan according to claim 1, wherein a wear ring nose chip is inserted into the nose portion of the rotor blade body using a heat-resistant adhesive. 5. Claim 1, wherein the gas to be handled is exhaust gas from a coal-fired boiler that is high in temperature and contains a large amount of dust.
5. The rotor blade of the axial flow fan according to 2, 3 or 4. 6. The rotor blade of an axial flow fan according to claim 1, 2, 3, 4 or 5, wherein the axial flow fan is either an induced type or a boost type fan.