Grinding roller and mill

Patent metadata

Field	Value
Publication number	US-2018071745-A1
Application number	US-201515554561-A
Country	US
Kind code	A1
Filing date	Aug 31, 2015
Priority date	Mar 5, 2015
Publication date	Mar 15, 2018
Grant date	—

Abstract

A grinding roller is configured so that the fatigue strength of a roller housing can be ensured, and product life can thus be ensured. The grinding roller includes: a roller housing; a roller main body; a pressing plate; a tab hole; and a tab. A line at which fastening stress caused by the pressing plate is concentrated on a base portion of a fixing stopper part of the roller housing and a line at which stress caused by a grinding load received by the roller main body is concentrated on a base portion of the tab hole of the roller housing are disposed in an offset manner so as not to intersect each other.

First claim

1 - 6 . (canceled)

7 . A grinding roller comprising:
a roller housing including a roller supporter on an outer circumference thereof, the roller supporter including a fixing stopper part on an outer circumference of one end portion thereof; a roller main body mounted on the roller supporter provided on the outer circumference of the roller housing; a pressing plate fastened to an other end of the roller supporter and configured to fix the roller main body to the roller housing in an axial direction in cooperation with the fixing stopper part; a tab hole formed in both an outer circumference of one end of the roller supporter and an inner circumference of one end of the roller main body; and a tab disposed in each of the tab holes and fixed to the one end of the roller supporter, the tab being configured to fix the roller main body to the roller housing in a rotational direction, wherein a line at which fastening stress caused by the pressing plate is concentrated on a base portion of the fixing stopper part and a line at which stress caused by a grinding load received by the roller main body is concentrated on a base portion of the tab hole of the roller housing are disposed in an offset manner so as not to intersect each other.

8 . The grinding roller according to claim 7 , wherein
the tab hole and the tab include rotational direction surfaces that face each other in a roller rotational direction and are capable of coming into contact with each other, and a base portion of the rotational direction surface of the tab hole of the roller housing is disposed closer to a roller rotation center than a base portion of the fixing stopper part.

9 . The grinding roller according to claim 7 wherein
the tab hole and the tab include the rotational direction surfaces that face each other in the roller rotational direction and are capable of coming into contact with each other, and
a base portion of the rotational direction surface of the tab hole of the roller housing is formed in a curved surface shape to disperse stress.

10 . The grinding roller according to claim 8 , wherein
the tab hole and the tab include the rotational direction surfaces that face each other in the roller rotational direction and are capable of coming into contact with each other, and a base portion of the rotational direction surface of the tab hole of the roller housing is formed in a curved surface shape to disperse stress.

11 . A grinding roller comprising:
a roller housing including a roller supporter on an outer circumference thereof, the roller supporter including a fixing stopper part on an outer circumference of one end portion thereof; a roller main body mounted on the roller supporter provided on the outer circumference of the roller housing; a pressing plate fastened to an other end of the roller supporter and configured to fix the roller main body to the roller housing in an axial direction in cooperation with the fixing stopper part; a tab hole formed on one end of the roller main body; and a tab portion formed in the roller housing and disposed in the tab hole, the tab portion being configured to fix the roller main body to the roller housing in a rotational direction, wherein a line at which fastening stress caused by the pressing plate is concentrated on a base portion of the fixing stopper part and a line at which stress caused by a grinding load received by the roller main body is concentrated on a base portion of the tab portion of the roller housing are disposed in an offset manner so as not to intersect each other.

12 . The grinding roller according to claim 11 , wherein
the tab hole and the tab portion include rotational direction surfaces that face each other in a roller rotational direction and are capable of coming into contact with each other, the tab portion of the roller housing is provided protruding outward in a radial direction beyond the fixing stopper part, and a base portion of the rotational direction surface of the tab portion is formed in a curved surface shape to disperse stress.

13 . A mill comprising:
a housing formed in a hollow shape; a grinding table supported by a support shaft extending along a vertical direction in the housing to be capable of being driven to rotate; and a grinding roller according to claim 7 disposed above the grinding table and rotatably supported by a support shaft, the grinding roller being capable of rotating together with the grinding table as a result of an outer circumferential surface of the grinding roller coming into contact with a top surface of the grinding table.

14 . A mill comprising:
a housing formed in a hollow shape; a grinding table supported by a support shaft extending along a vertical direction in the housing to be capable of being driven to rotate; and a grinding roller according to claim 8 disposed above the grinding table and rotatably supported by a support shaft, the grinding roller being capable of rotating together with the grinding table as a result of an outer circumferential surface of the grinding roller coming into contact with a top surface of the grinding table.

15 . A mill comprising:
a housing formed in a hollow shape; a grinding table supported by a support shaft extending along a vertical direction in the housing to be capable of being driven to rotate; and a grinding roller according to claim 9 disposed above the grinding table and rotatably supported by a support shaft, the grinding roller being capable of rotating together with the grinding table as a result of an outer circumferential surface of the grinding roller coming into contact with a top surface of the grinding table.

16 . A mill comprising:
a housing formed in a hollow shape; a grinding table supported by a support shaft extending along a vertical direction in the housing to be capable of being driven to rotate; and a grinding roller according to claim 10 disposed above the grinding table and rotatably supported by a support shaft, the grinding roller being capable of rotating together with the grinding table as a result of an outer circumferential surface of the grinding roller coming into contact with a top surface of the grinding table.

17 . A mill comprising:
a housing formed in a hollow shape; a grinding table supported by a support shaft extending along a vertical direction in the housing to be capable of being driven to rotate; and a grinding roller according to claim 11 disposed above the grinding table and rotatably supported by a support shaft, the grinding roller being capable of rotating together with the grinding table as a result of an outer circumferential surface of the grinding roller coming into contact with a top surface of the grinding table.

18 . A mill comprising:
a housing formed in a hollow shape; a grinding table supported by a support shaft extending along a vertical direction in the housing to be capable of being driven to rotate; and a grinding roller according to claim 12 disposed above the grinding table and rotatably supported by a support shaft, the grinding roller being capable of rotating together with the grinding table as a result of an outer circumferential surface of the grinding roller coming into contact with a top surface of the grinding table.

Assignees

• Mitsubishi Hitachi Power Sys

Inventors

• Hirose Yuichi
• Tominaga Yoshimichi

Classifications

• B02C15/04

  Mills with pressed pendularly-mounted rollers, e.g. spring pressed · CPC title

• B02C15/005 Primary

  Rollers or balls of composite construction · CPC title

• B02C2015/002

  combined with a classifier · CPC title