JPS61231319A - Diffuser vane body of burner device - Google Patents

Abstract

PURPOSE:To improve the wear resistance and the heat resistance of the vane so as to prevent the damage of the device by providing a mounting base portion radially on a ring, and mechanically mounting a split type ceramic liner so that the mounting base is included thereby to constitute a vane body. CONSTITUTION:The diffuser vane body is composed of a ring as an ejecting port for ejecting gas, oil, pulverized coal and the like, and a plurality of diffuser vanes 2 provided n the outer peripheral surface of the ring 1 and revolving air. The vanes 2 are radially provided upright around the outer periphery of the ring 1 and have flat mounting bases 3 fixed to the outer tube. This mounting base 3 and the ring 1 are integrally formed of a metal having a heat resistance and a wear resistance. Split type ceramic liners 5 and 6 are mounted on the outer surface of the mounting base 3 via a clearance sheet 4 so that the ceramic liners 5 and 6 include the peripheral surface of the mounting base 3. Since the split type ceramic liners 5 and 6 are mechanically mounted on the outer peripheral part, the vanes 2 can evade any thermal strain and further can afford the heat resistance and wear resistance of the ceramic material itself.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a diffuser blade of a burner device which is attached to a large-capacity burner device and swirls air.

[Go to L11 Conventionally, as illustrated in FIG.
The blades P of the diffuser blade attached near B are fixed to an outer tube T and an inner tube t made of heat-resistant cast steel or heat-resistant steel.

Then, air is fed at high speed into the flow path F1 between the lower outer tube and the inner tube t, and fuel such as gas, oil, powdered coal, etc. is fed into the flow path F2 inside the inner tube. By swirling the air, fuel and air are mixed and burnt by burner B.

This blade P is made of heat-resistant metal ring R in multiple stages, but since it is made of heat-resistant cast steel or heat-resistant steel, it is susceptible to hot abrasion and close distance from the flame of burner B. Due to the radiant heat, its lifespan is extremely short, 1 to 3 months.

Therefore, I
One possibility is to adopt IP.

However, this type of blade is susceptible to failure due to structural distortion.

R'J and IJL Therefore, it is an object of the present invention to provide a diffuser blade body for a burner device that has the highest air flow velocity, prevents damage to the stomach which is subject to wear and prolongs its life.

Therefore, in order to achieve this object, the gist of the present invention is that, in a diffuser blade made of gold that is attached to a burner device, the blade has a mounting base provided radially on the ring, and a mounting base formed on the ring. A diffuser wing body for a burner device, comprising: a split ceramic liner mechanically attached to a mounting base so as to encompass the diffuser blade body of the burner device.

11LL1E1L Maruhige 11 The blade 2 of the diffuser blade body made of metal, which has the highest air flow velocity and is subject to severe wear, has a ceramic liner 5.6 divided into parts for the mounting base 3 provided radially on the ring 1. It is mechanically attached and includes the attachment base 3.

This not only improves the abrasion resistance and heat resistance of the stomach 2 but also prevents breakage and extends the life of the stomach 112.

Support i1 The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 shows an embodiment of the invention. FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1 of the diffuser blade body.

The diffuser blade shown in the figure includes a ring 1 as a spout for gas, oil, powdered coal, etc., and a plurality of diffuser blades (hereinafter referred to as 8 in the example) provided on the outer peripheral surface of this ring 1 to swirl the air. It consists of two parts (referred to as wings).

As shown in FIGS. 2 and 3, this 112 has a flat mounting base 3 that stands radially on the outer periphery of the ring 1 and is fixed to the outer tube as shown in FIG. ing.

The mounting base 3 and the ring 1 are integrally made of nine metals having heat resistance and wear resistance, such as steel 5US304.

A gap sheet 4 made of ceramic fiber is attached to the outer surface of the mounting base 3. Then, through this gap sheet 4, a ceramic liner 5.6 of a two-piece type in the embodiment is inserted.
is attached so as to encompass the periphery of the attachment base 3.

This ceramic liner 5.6 has contact surfaces 5a 16a that are in close contact with the side end surfaces 3a and 3b of the mounting base 3, and left and right end surfaces 3c 13d 1. : Close contact surfaces 5b, 6b
have.

A cover portion 5d that covers the upper end surface of the mounting base 3 is formed on the ceramic liner 5.

This ceramic liner 5.6 is made, for example, of SiC or S(3N4).

To install Ceramic Lychee 5.6 to the mounting base 3,
This is done by means of bolts 7 and nuts 8 made of metal or preferably ceramic. That is, the ceramic liner 5.6 has a bolt insertion hole 5C and a nut insertion hole 6C, respectively.
The mounting base 3 is provided with an insertion hole 3e, and the mounting is performed by inserting and screwing a bolt 7 and a nut 8, respectively.

Thin ceramic lids 9 and 10 are fixed to the head of the bolt 7 and the nut 8 through ceramic cement 11, respectively.

The mating surfaces of the parts of the ceramic liners 5.6 that are in close contact with each other are fixed with ceramic cement 11.

Note that better results can be obtained if the bolt 7 and nut 8 are made of ceramic.

By the way, when the ceramic liner 5.6 is attached, as shown in FIG.
6 is mounted in the direction L2-12, which is the longitudinal direction L of the mounting base 3.
It is swung at a predetermined angle θ with respect to l-11.

The blade 2 with this structure has a split ceramic liner 5.6 mechanically attached to the outer periphery, so thermal distortion can be avoided, and it also has the heat resistance and abrasion resistance inherent to ceramic materials. can do.

By the way, the present invention is not limited to the embodiments described above, and various modifications can be made. For example, the ceramic liner is not limited to two parts, but may be three or more parts. Also,
The cover portion 5d may be eliminated and the mounting base 3 may be extended so that the upper end surface of the mounting base 3 and each upper end surface of the ceramic liner 5.6 are flush with each other.

As is clear from the above explanation, since the split ceramic liner is mechanically attached to the diffuser,
It has the highest air flow velocity and has the excellent effect of preventing damage to the blades, which are rapidly wearing out, and extending their lifespan.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the invention, and FIG. 2 is a perspective view showing an embodiment of the invention.
A sectional view taken along line A-A in Fig. 1, Fig. 3 an exploded perspective view,
FIG. 4 is a sectional view showing a burner device equipped with a conventional diffuser bullet. i, Ring 2, Diffuser blade 3, Mounting base

Claims (1)

[Claims] In a metal diffuser blade attached to a burner device, the blade has a mounting base provided radially on the ring, and is mechanically attached to the mounting base so as to encompass the mounting base. A split ceramic liner,
A diffuser wing body for a burner device, characterized in that the diffuser wing body comprises: