IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0309141
(2007-06-22)
|
등록번호 |
US-8136706
(2012-03-20)
|
우선권정보 |
DE-10 2006 033 219 (2006-07-13) |
국제출원번호 |
PCT/DE2007/001119
(2007-06-22)
|
§371/§102 date |
20090107
(20090107)
|
국제공개번호 |
WO2008/006335
(2008-01-17)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
3 |
초록
▼
Screw feeder (1) for transporting and/or metering pulverulent or granular material, having a rotatably mounted feeder screw (3) for the transport of material from a storage vessel (2) to a discharge opening (6), and having a variable-speed motor (4) for driving the feeder screw, characterized in tha
Screw feeder (1) for transporting and/or metering pulverulent or granular material, having a rotatably mounted feeder screw (3) for the transport of material from a storage vessel (2) to a discharge opening (6), and having a variable-speed motor (4) for driving the feeder screw, characterized in that the speed is controlled by a programmable regulating device (7) which regulates the speed of the motor as a function of the respectively determined rotary position of the feeder screw within one full worm revolution.
대표청구항
▼
1. A screw feeder preferably adapted for transporting and/or metering pulverulent or granular material comprising a feeder screw (3) seated for rotation for transporting material from a storage vessel (2) to a discharges opening (6), and a variable speed motor (4) for driving said feeder screw, said
1. A screw feeder preferably adapted for transporting and/or metering pulverulent or granular material comprising a feeder screw (3) seated for rotation for transporting material from a storage vessel (2) to a discharges opening (6), and a variable speed motor (4) for driving said feeder screw, said motor being characterized in that, that the rotational speed control is obtained by a programmable control unit (7) which controls the rotational speed of the motor in dependence on the respective detected rotational position of the feeder screw within one full screw revolution, wherein a reference sensor (9) is provided for detecting absolute rotational position of the feeder screw (3). 2. A screw feeder as claimed in claim 1, characterized in that an incremental selsyn (8) is provided at the feeder screw (3) or at the shaft of the latter to detect the rotational position. 3. A screw feeder as claimed in claim 1, characterized in that a reference sensor (9) is provided for detecting absolute rotational position of the feeder screw (3). 4. A screw feeder as claimed in claim 1, characterized in that an absolute measuring selsyn is provided at the feeder screw (3) or at the drive shaft of the latter for detecting the rotational position and/or the absolute rotational position. 5. A screw feeder as claimed in claim 1, characterized in that suitable measuring and displaying means (11) are provided to detect the characteristic values for the material throughput of the feeder screw (3) as well as for plotting a characteristic curve characterizing the material throughput. 6. A screw feeder as claimed in claim 1, characterized in that an incremental selsyn (8) is provided at the feeder screw (3) or at the shaft of the latter to detect the rotational position. 7. A screw feeder as claimed in claim 1, characterized in that an absolute measuring selsyn is provided at the feeder screw (3) or at the drive shaft of the latter for detecting the rotational position and/or the absolute rotational position. 8. A screw feeder preferably adapted for transporting and/or metering pulverulent or granular material comprising: a feeder screw (3) seated for rotational movements about its longitudinal axis for transporting material from a storage vessel (2) to a discharge opening (6), whereby said storage vessel (2) positioned adjacent to one longitudinal end of said screw feeder as input opening and said discharge opening being positioned adjacent to the other longitudinal end of said screw feeder, a variable speed motor (4), which is engaged with said rotatably seated feeder screw (3) for driving said feeder screw, and a programmable control unit (7), which is coupling with means for detecting of rotational position of the feeder screw (3) and connected with said variable speed motor (4), said programmable control unit controls the rotational speed of said motor in dependence on the respective detected rotational position of the feeder screw (3) within one full screw revolution. 9. A screw feeder as claimed in claim 8, characterized in that the rotational speed control is additionally controlled in dependence on the amount of the discharged material, detected by a weighing means, and/or in dependence on the preselected angle of inclination of the feeder screw (3). 10. A screw feeder as claimed in claim 8, characterized in that an electromotive drive is provided for driving the screw shaft of the feeder screw (3). 11. A screw feeder as claimed in claim 8, characterized in that an incremental selsyn (8) is provided at the feeder screw (3) or at the shaft of the latter to detect the rotational position. 12. A screw feeder as claimed in claim 8, characterized in that a reference sensor (9) is provided for detecting absolute rotational position of the feeder screw (3). 13. A screw feeder as claimed in claim 8, characterized in that an absolute measuring selsyn is provided at the feeder screw (3) or at the drive shaft of the latter for detecting the rotational position and/or the absolute rotational position. 14. A screw feeder as claimed in claim 8, characterized in that suitable measuring and displaying means (11) are provided to detect the characteristic values for the material throughput of the feeder screw (3) as well as for plotting a characteristic curve characterizing the material throughput. 15. A screw feeder as claimed in claim 8, characterized in that the rotational speed control is additionally controlled in dependence on the amount of the discharged material, detected by a weighing means, and/or in dependence on the preselected angle of inclination of the feeder screw (3). 16. A screw feeder as claimed in claim 8, characterized in that an electromotive drive is provided for driving the screw shaft of the feeder screw (3). 17. A screw feeder as claimed in claim 8, characterized in that an incremental selsyns (8) is provided at the feeder screw (3) or at the shaft of the latter to detect the rotational position. 18. A screw feeder as claimed in claim 8, characterized in that a reference sensor (9) is provided for detecting absolute rotational position of the feeder screw (3). 19. A screw feeder as claimed in claim 8, characterized in that an absolute measuring selsyn is provided at the feeder screw (3) or at the drive shaft of the latter for detecting the rotational position and/or the absolute rotational position. 20. A screw feeder as claimed in claim 8, characterized in that suitable measuring and displaying means (11) are provided to detect the characteristic values for the material throughput of the feeder screw (3) as well as for plotting a characteristic curve characterizing the material throughput.
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