GB2110113A - Impeller bar for hammer type mill - Google Patents
Impeller bar for hammer type mill Download PDFInfo
- Publication number
- GB2110113A GB2110113A GB08222295A GB8222295A GB2110113A GB 2110113 A GB2110113 A GB 2110113A GB 08222295 A GB08222295 A GB 08222295A GB 8222295 A GB8222295 A GB 8222295A GB 2110113 A GB2110113 A GB 2110113A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impeller
- impeller bar
- bar
- inserts
- hammer type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/28—Shape or construction of beater elements
- B02C13/2804—Shape or construction of beater elements the beater elements being rigidly connected to the rotor
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
An impeller bar 1 for a hammer type mill incorporates a plurality of peripherally located, hard material inserts 7, preferably located in axially extending rows 6. Each insert is brazed in a blind hole. <IMAGE>
Description
SPECIFICATION
Impeller bar for hammer type mill
This invention relates to an impeller bar for a hammer type mill, for the pulverising of minerals, refuse etc., and to a hammer type mill provided with such an impeller bar.
Conventionally, impeller bars of hammer type mills have fixed or swingable hammers attached to a rotor, which is conventionally rotatable about a horizontal axis, the impeller bars cooperating with one or more fixed anviis to produce the desired pulverising effect. The service conditions inevitably produce substantial wear on the impeller bars, resulting in relatively frequent replacement and hence down time of the mill. Attempts to extend the service life of impeller bars have included such techniques as hard face welding, and the industry has hitherto accepted the relatively short service life even of bars incorporating hard face welding. In other industrial applications, such as mineral cutting tools, whether for mineral winning operations, or for road planing operations, hard material inserts e.g.
of tungsten carbide, have been fitted to the tools involved to provide a lengthened service life, and although such mineral cutting tools have been known for many years, they have not influenced the design of hammer mills nor the impeller bars thereof.
According to the present invention there is provided an impeller bar for a hammer type mill incorporating a plurality of peripherally located, hard material inserts.
The invention also includes a hammer type mill provided with an impeller bar as defined above.
Conveniently, the inserts are of tungsten carbide, but other hard metal carbides may be employed. It is preferred for the inserts to be located along the full axial length of the impeller bar and conveniently each insert is constructed from a plurality of insert pieces located together end-to-end. With this last mentioned construction it may be arranged for the inserts to extend continuously from endto-end of the impeller bar, or alternatively for gaps to be provided between adjacent ends of adjacent insert pieces. Alternatively, the inserts may taken the form of relatively small studs secured e.g. by brazing, in axially spaced apart apertures. In one preferred construction two peripherally spaced rows of inserts are provided on each impeller bar.
The invention will now be described in greater detail, by way of example, with reference to the accompanying drawing, which is an isometric view of one end of an impeller bar in accordance with the invention.
An elongate impeller bar is indicated generally at 1 and a plurality of such bars are secured, in the known manner, axially along the periphery of a rotor (not shown) of a hammer type mill, with a rear face 2 of the impeller bar 1 being provided with a tongue and groove profile 3 for location purposes on the rotor. An outer periphery 4 of the impeller bar 1 is located, in service, remote from the rotor and is provided, along peripherally spaced chamfered edges 5, with a row 6 of axially spaced apart tungsten carbide inserts 7 of circular section, each insert 7 being brazed in a blind hole 8.The rows 6 are provided at locations on the impeller bar 1 where a major part of the pulverising action of the mill will be effected and hence where extensive wear would normally be expected, the extreme wear resistant properties of the inserts protecting the adjacent material of the impeller bar 1 ànd hence extending the service life thereof.
1. An impeller bar for a hammer type mill incorporating a plurality of peripherally located, hard material inserts.
2. An impeller bar as claimed in Claim 1, wherein the inserts are of tungsten carbide.
3. An impeller bar as claimed in Claim 1 or Claim 2, wherein the inserts are located along the full axial length of the impeller bar.
4. An impeller bar as claimed in any preceding Claim, wherein each insert is constructed from a plurality of insert pieces located together end-to-end.
5. An impeller bar as claimed in Claim 4, wherein the inserts extend continuously from end-to-end of the impeller bar.
6. An impeller bar as claimed in Claim 4, wherein gaps are provided between adjacent ends of adjacent insert pieces.
7. An impeller bar as claimed in any one of Claims 1 to 3, wherein the inserts take the form of relatively small studs.
8. An impeller bar as claimed in Claim 7, wherein the studs are secured in axially spaced apart apertures.
9. An impeller bar as claimed in Claim 8, wherein the studs are secured by brazing.
10. An impeller bar as claimed in any preceding Claim, wherein two peripherally spaced rows of inserts are provided on each impeller bar.
11. An impeller bar substantially as hereinbefore desribed with reference to the accompanying drawing.
1 2. A hammer type mill provided with an impeller bar as defined in any preceding
Claim.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (11)
1. An impeller bar for a hammer type mill incorporating a plurality of peripherally located, hard material inserts.
2. An impeller bar as claimed in Claim 1, wherein the inserts are of tungsten carbide.
3. An impeller bar as claimed in Claim 1 or Claim 2, wherein the inserts are located along the full axial length of the impeller bar.
4. An impeller bar as claimed in any preceding Claim, wherein each insert is constructed from a plurality of insert pieces located together end-to-end.
5. An impeller bar as claimed in Claim 4, wherein the inserts extend continuously from end-to-end of the impeller bar.
6. An impeller bar as claimed in Claim 4, wherein gaps are provided between adjacent ends of adjacent insert pieces.
7. An impeller bar as claimed in any one of Claims 1 to 3, wherein the inserts take the form of relatively small studs.
8. An impeller bar as claimed in Claim 7, wherein the studs are secured in axially spaced apart apertures.
9. An impeller bar as claimed in Claim 8, wherein the studs are secured by brazing.
10. An impeller bar as claimed in any preceding Claim, wherein two peripherally spaced rows of inserts are provided on each impeller bar.
11. An impeller bar substantially as hereinbefore desribed with reference to the accompanying drawing.
1 2. A hammer type mill provided with an impeller bar as defined in any preceding
Claim.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08222295A GB2110113A (en) | 1981-11-12 | 1982-08-02 | Impeller bar for hammer type mill |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8134101 | 1981-11-12 | ||
GB08222295A GB2110113A (en) | 1981-11-12 | 1982-08-02 | Impeller bar for hammer type mill |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2110113A true GB2110113A (en) | 1983-06-15 |
Family
ID=26281245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08222295A Withdrawn GB2110113A (en) | 1981-11-12 | 1982-08-02 | Impeller bar for hammer type mill |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2110113A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0209757A2 (en) * | 1985-07-17 | 1987-01-28 | Hermann Schrödl | Impact bar for an impact crusher rotor |
EP0224836A2 (en) * | 1985-12-03 | 1987-06-10 | Hermann Schrödl | Impact bar for impact crushers or similar crushers |
US5497950A (en) * | 1993-07-12 | 1996-03-12 | Schroedl; Hermann | Rotor for a disintegrating machine |
WO2002028535A1 (en) * | 2000-10-02 | 2002-04-11 | Sandvik Ab; (Publ) | Striker bar for disintegrating breakable materials |
CN102397805A (en) * | 2011-12-21 | 2012-04-04 | 常熟市电力耐磨合金铸造有限公司 | Ultrahigh-manganese cast hammer head |
CN102407179A (en) * | 2011-12-21 | 2012-04-11 | 常熟市电力耐磨合金铸造有限公司 | Ultrahigh-manganese cast-in board hammer |
CN102430452A (en) * | 2011-12-21 | 2012-05-02 | 常熟市电力耐磨合金铸造有限公司 | Ultra-high manganese rod-imbedded clinker crushing hammer |
CN103240401A (en) * | 2013-04-19 | 2013-08-14 | 陕西理工学院 | Production method of high alloy steel bimetal combined hammerhead |
WO2015192908A1 (en) * | 2014-06-19 | 2015-12-23 | Sandvik Intellectual Property Ab | A hammer for a horizontal shaft impact crusher |
-
1982
- 1982-08-02 GB GB08222295A patent/GB2110113A/en not_active Withdrawn
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0209757A2 (en) * | 1985-07-17 | 1987-01-28 | Hermann Schrödl | Impact bar for an impact crusher rotor |
EP0209757A3 (en) * | 1985-07-17 | 1987-09-02 | Fried. Krupp Gesellschaft Mit Beschrankter Haftung | Impact bar for an impact crusher rotor |
EP0224836A2 (en) * | 1985-12-03 | 1987-06-10 | Hermann Schrödl | Impact bar for impact crushers or similar crushers |
EP0224836A3 (en) * | 1985-12-03 | 1988-08-03 | Fried. Krupp Gesellschaft Mit Beschrankter Haftung | Impact bar for impact crushers or similar crushers |
US5497950A (en) * | 1993-07-12 | 1996-03-12 | Schroedl; Hermann | Rotor for a disintegrating machine |
AT402371B (en) * | 1993-07-12 | 1997-04-25 | Schroedl Hermann | ROTOR FOR A CRUSHING MACHINE |
WO2002028535A1 (en) * | 2000-10-02 | 2002-04-11 | Sandvik Ab; (Publ) | Striker bar for disintegrating breakable materials |
CN102397805A (en) * | 2011-12-21 | 2012-04-04 | 常熟市电力耐磨合金铸造有限公司 | Ultrahigh-manganese cast hammer head |
CN102407179A (en) * | 2011-12-21 | 2012-04-11 | 常熟市电力耐磨合金铸造有限公司 | Ultrahigh-manganese cast-in board hammer |
CN102430452A (en) * | 2011-12-21 | 2012-05-02 | 常熟市电力耐磨合金铸造有限公司 | Ultra-high manganese rod-imbedded clinker crushing hammer |
CN103240401A (en) * | 2013-04-19 | 2013-08-14 | 陕西理工学院 | Production method of high alloy steel bimetal combined hammerhead |
WO2015192908A1 (en) * | 2014-06-19 | 2015-12-23 | Sandvik Intellectual Property Ab | A hammer for a horizontal shaft impact crusher |
CN105195264A (en) * | 2014-06-19 | 2015-12-30 | 山特维克知识产权股份有限公司 | A Hammer For A Horizontal Shaft Impact Crusher |
US10695768B2 (en) | 2014-06-19 | 2020-06-30 | Sandvik Intellectual Property Ab | Hammer for a horizontal shaft impact crusher |
CN105195264B (en) * | 2014-06-19 | 2021-03-09 | 山特维克知识产权股份有限公司 | Hammer head for horizontal shaft impact crusher |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6382277B1 (en) | Stump grinding wheel and cutting assemblies therefor | |
US4519551A (en) | Replaceable protective caps for spider arms of a reversible hammer mill | |
US6042035A (en) | Crushing machine with rotor | |
CA2352788C (en) | Field replaceable helical flight | |
GB2110113A (en) | Impeller bar for hammer type mill | |
US7607601B2 (en) | Wear tip for rotary mineral breaker | |
US6260780B1 (en) | Paper shredder shaft | |
SE450259B (en) | TOOLING OR CUTTING OF SOLID MATERIALS, AS ASPHALT | |
EP1455962B1 (en) | Segmented ring guide for rolling mill laying head | |
US4343438A (en) | Ring hammer | |
CN105636747B (en) | Cutting tool | |
US4290545A (en) | Method of attaching a protective cap to a shredder component | |
US4015783A (en) | Reversible grate bar and support for crushers | |
US3612420A (en) | Striking bar for cage mill | |
AU7824894A (en) | Accessory for mineral breaker | |
US1420355A (en) | Bar cage for grinders | |
GB2402146A (en) | Drilling tool | |
FI86514C (en) | Mill chamber for a counter-jet mill | |
DE102015205012A1 (en) | Hammer for shredding materials, especially rocks | |
CN111867733A (en) | Impact tool for use in high speed pulverizer | |
USRE28368E (en) | Grate bar assembly for a rock crusher | |
US3617007A (en) | Grate bar assembly for a rock crusher | |
US730503A (en) | Crusher and pulverizer. | |
EP0246775A2 (en) | Mineral breaker | |
GB2110954A (en) | Tool-holding mounting ring for crushing machine rotor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |