US1575452A - Pulverizer beater - Google Patents

Description

'W. H. SHAVE PULVE'RIZER BEATER' Filed June 23, 1922 March 2 1926 Patented Mar. 2, 1926.

UNITED STATES.

* 1,575,452? PATENT OFFICE.

WILLIAM H. SHAVE, or ERIE, PENNSYLVANIA, Assrenon, BY ivrnsnn ASSIGNMENTS,

T0 ERIE CITY IRON worms, A conronnrron or PENNSYLVANIA.

PULVERIZER BEA'IER.

Application filed June 23, 1922. Serial No. 570,445. g

i To all whom it may concern:

Be it'known that I, WILLIAM H. SHAVE, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Pulverizer Beaters, of whichthe following is a. specification.

This invention is intended to simplify the construction of rotary beaters for pulverizers, particularly such pulverizers as are used for pulverizing coal for immediate consumption at the furnace. WVith such pulverizers the coal is pulverized and the fuel carried through the pulverizer with the air for combustion.

These heaters are driven at a very high rate of speed and are consequently subjected to great strain and the blades are subjected to great wear so that they have to be renewed. With this invention the manner of sustaining the strains and the construction of the blades is simplified.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows a central vertical section.

Fig. 2 an end view, partly in section.

Fig. 8 a plan view of one of the support- 1 .ing bars and blades.

Fig. 4 a side elevation of the blades.

Fig. 5 an enlarged section of one of the blades and a portion of the supporting carmen 1 marks the shaft on which the carrier is mounted, and 2 hub members which are connected by a tube 8 forming a completed hub. The members 2 have the flanges 4 to which discs 5 are secured. The discs have the conical flanges, 6. "A drum 7 is secured to these flanges.

Securing bars 8 are secured to the flanges 6 by means of rivets 9. These bars are T- shaped and have parallel walls thus giving them a shape which can be readily formed by rolling. The bars form undercut grooves 10, the grooves being tapered by reason of the conical shape of the drum. Blades 11 have bases 12 which extend under the under cut portions of the bars thus securing the blades in place. The blades are sectional and ordinarily formed of cast metal and are tapered so as to conform to the taper of the groove 10. They are slid into the grooves and are provided with the extensions 14 for furnishin driving fans for functional purposes in t e pulverizer.

The tremendous strain to which the T bars are subjected by reason of the centrifugal forceand the impact on the blades is diflicult to sustain and this is increased by the overhanging ends. To better secure the bars, therefore, Iv provide the small shoulders 15 on the ends of the barsand at the, small end of the drum I provide a securing ring 16 which is secured to the disc 5 and has an inturned hook 17 which engages the shoulder 15 thus supplementing the rivets 9 in securing the bars in place. At the large end of the drumI provide a ring 18. This is secured by bolts 19 on the disc 5 and has an inturned annular hook 20 for engaging the shoulders l5at this end of the bars 8. The ring 18 is, therefore, removable to permit of the removal of the beater blades. At the same time it secures the bars as against centrifugal force and impact strains.

What I claim as new is 1. In a pulverizer beater, the combination of a rotary carrier having a conical periphery; blade supporting bars having parallel walls and undercut portions secured to the carrier and forming tapered blade securing grooves; and blades having bases extending under the undercut portions of the bars,'the blades being tapered.

2. In a pulverized beater, the combination of a rotary carrier having a conical pcriphery; blade supporting bars having parallel walls and undercut portions secured to the carrier and forming tapered, blade securing grooves; andblades having bases extending under the undercut portions of the bars, the blades being tapered and sew tional.

3. In a pulverizer beater, the combination of a carrier formed with a hub; flanged discs secured to the hub; blade supporting bars the bars; and a ring engaging the ends of no the blades and securing said bars.

5. In a pulverizer beater, the combination of a rotary carrier; bars having undercut portions secured to its periphery, said bars forming blade receiving grooves; blades havingbases arranged in said grooves and extending under the undercut, portions of the bars; and a removable ring engaging the ends of the blades and securing said bars. 7 y

6. In a pulverizer beater, the combination of aqrotary carrier;. blade securing bars havingundercut portions arrai'iged on the periphery of the carrier; blades arranged between and supported by the bars and extending under the undercut portions of-iho bars; and a ring at the end of the bars locking the blades against endWise movement and having a hook extending over the bars for securing the bars.

20 7. In a pulverizer beaten-the combination of a rotary carrier; undercut bars arranged on the periphery of. the carrier; bl'ades' arranged between the bars and supported thereby and rings at the ends of the carrier loelung the blades in place, said'rmgs having inturn'ed' hool'is' extending over the bars for securing the bars.

8. In a pulverizer beater, the combination of at vrotary carrier; undercut bars arranged on the periphery of the carrier;

blades arranged between the bars and sup- \VILLIAM I-I. SHAVE.

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