Crusher

Abstract

To provide a crusher in which the hammer discs and hammer plates are easy to manufacture, repair, and replace, and which reduces weight and manufacturing and repair costs. [Solution] The device comprises a roughly regular octagonal frustum-shaped housing 10, which is roughly a regular polygon with a cross-sectional area that decreases from top to bottom in the vertical direction, and a rotor 20 whose central axis is the axis of rotation 21. The rotor comprises a plurality of first hammer members 24 that project radially in the horizontal direction from the axis of rotation, and a plurality of hammer discs 23 arranged in the vertical direction. On the inner surface of each side wall 11 constituting the housing, there are hammer plates 30A and 30B, each equipped with a second hammer member 32 that faces the hammer disc. The hammer plate consists of a wide base plate 31 that is flat and made of Swedish steel plate with high rigidity and toughness, and one or more second hammer members 32 that are fixed to one surface of the base plate, made of the same steel plate as the base plate, and are narrower than the base plate.

Claims

1. A crusher comprising a housing that is a roughly regular polygonal frustum with a horizontal cross-section of five or more sides and whose cross-sectional area decreases from top to bottom in the vertical direction, and a rotor whose axis of rotation is the central axis of the horizontal cross-section of the housing, The rotor comprises a plurality of first hammer members projecting radially horizontally from the rotation axis, and a plurality of hammer discs arranged vertically. Each side wall constituting the housing is provided with a hammer plate on its inner surface, which faces the multiple hammer discs. The crusher is characterized in that the hammer plate comprises a wide base plate made of a flat, rigid and tough steel plate, and one or more second hammer members fixed to one surface of the base plate, made of the same steel plate as the base plate, and narrower than the base plate.

2. The crusher according to claim 1, characterized in that the base plate of the hammer plate and the second hammer member are fixed together by welding or bolting.

3. A flange member is attached to the lowest section of the base plate of the hammer plate at an angle that makes it horizontal when the hammer plate is attached to the inner surface of the side wall, and a third hammer member, which is arc-shaped in plan view, is fixed to the flange member. The crusher according to claim 1, characterized in that when the flange members and hammer members of the hammer plate provided on the inner surfaces of all the side walls forming the regular polygon are connected, a perfect circle is formed on the inner circumference of the third hammer member.

4. The crusher according to claim 1 or 2, characterized in that the thickness of the steel plate of the second hammer member of two vertically adjacent hammer plates among the multiple hammer plates is set to be different.

5. The crusher according to claim 1, characterized in that the first hammer member and the third hammer member of the hammer disc are formed of the same highly rigid and tough steel plate as the base plate and the second hammer member of the hammer plate.

6. The crusher according to claim 5, characterized in that Swedish steel HARDOX (trade name) is used as the steel plate with high rigidity and toughness.

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