A wear-resistant ball

Abstract

The present invention discloses a high-strength wear-resistant ball, which relates to the technical field of ball mills. The high-strength wear-resistant ball comprises a central base ball, the outer surface of which has a plurality of ridges, which are arranged in an alternating manner along the longitudinal and latitudinal directions of the central base ball so that a plurality of recesses are formed on the surface of the central base ball, and elastic buffers are built into the recesses. The outer surface of the central base ball is covered with a spherical shell, and a plurality of protrusions are provided on the inner side of the spherical shell. The protrusions are correspondingly embedded in the recesses and abut against the elastic buffers. The high-strength wear-resistant ball proposed by the present invention can prevent deformation and cracks caused by collision of the wear-resistant ball from being directly transmitted to the interior thereof, thereby affecting the overall strength of the wear-resistant ball, and thus can withstand stronger collisions.

Description

Technical Field

[0001] The present invention relates to the technical field of ball mills, in particular to a wear-resistant ball. Background Art

[0002] Wear-resistant balls are a type of crushing medium used in ball mills. They flip and collide with the rotation of the ball mill cylinder, thereby crushing the material in the cylinder. At present, wear-resistant balls are generally cast in one piece from alloy cast iron or ductile iron materials, so they have good integrity. However, the problems that come with it are also more obvious. Since the wear-resistant balls are solid and integrated, the deformation and cracks on the surface of the wear-resistant balls caused by long-term collisions will directly extend and spread into the interior, eventually resulting in a decrease in the strength of the wear-resistant balls and an inability to meet usage requirements. Summary of the Invention

[0003] In order to solve the technical problems existing in the background technology, the present invention provides a wear-resistant ball.

[0004] A wear-resistant ball includes a central base ball. The outer surface of the central base ball has multiple ridges. The ridges are staggered along the longitudinal and latitudinal directions of the central base ball to form a plurality of recesses on the surface of the central base ball. The recesses have elastic buffers built into them. The central base ball is covered with a spherical shell. The inner side of the spherical shell is provided with a plurality of protrusions. The protrusions are correspondingly embedded in the recesses and abut the elastic buffers.

[0005] As a further optimization of the above solution, the elastic buffer is a metal wire mesh that is suspended and laid in the recess and tensioned.

[0006] As a further optimization of the above solution, the metal wire meshes in two adjacent notches are independent of each other.

[0007] As a further optimization of the above solution, the spherical shell has an inner cushion layer and an outer reinforcement layer, the protrusion and the inner cushion layer are integrally formed, and the thickness of the outer reinforcement layer is not less than the thickness of the inner cushion layer.

[0008] As a further optimization of the above solution, the inner cushion layer and the central base ball are clearance-matched.

[0009] As a further optimization of the above scheme, the composition of the outer reinforcement layer of the spherical shell includes, by weight percentage: C: 2.0-3.3%; Si: ≤1.2%; Mn: 0.3-1.5%; Cr: 18.0-23.0%; Mo: ≤3.0%; P: ≤1.0%; S: ≤0.06%; and the balance is Fe.

[0010] 1. The wear-resistant ball proposed in the present invention is divided into two parts: a central base ball and a spherical shell. An elastic buffer is provided between the central base ball and the spherical shell to relieve part of the force during collision, thereby preventing the deformation and cracks caused by the collision of the wear-resistant ball from being directly transmitted to its interior, affecting the overall strength of the wear-resistant ball.

[0011] 2. The wear-resistant ball proposed in the present invention has a shell composed of two layers, the inner and outer layers. Even if the surface of the wear-resistant layer is deformed or damaged due to collision, the impact on the inner layer will be greatly weakened.

[0012] 3. The wear-resistant ball proposed in the present invention has a clearance fit between the central base ball and the spherical shell, so that the central base ball has a certain movable space in the spherical shell. When the wear-resistant balls collide, the central base ball can further exert force under the action of inertia, thereby improving the crushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A perspective schematic diagram of a wear-resistant ball proposed by the present invention;

[0014] Figure 2 This is a schematic cross-sectional view of the spherical shell of a wear-resistant ball proposed by the present invention. DETAILED DESCRIPTION

[0015] A wear-resistant ball proposed in this embodiment, referring to Figure 1 and Figure 2 , including a central base ball 1, the outer surface of the central base ball 1 has a plurality of ridges 2, the ridges 2 are equivalent to reinforcing ribs, which can improve the impact resistance of the central base ball 1, and in addition, the ridges 2 are staggered along the longitudinal and latitudinal directions of the central base ball 1 so that a plurality of recesses 100 are formed on the surface of the central base ball 1, and elastic buffers are built into the recesses 100. The outside of the central base ball 1 is covered with a spherical shell 4, and a plurality of protrusions 5 are provided on the inner side of the spherical shell 4. The protrusions 5 are correspondingly embedded in the recesses 100 and abut against the elastic buffers to unload part of the collision force when the wear-resistant balls collide. At the same time, the split design of the central base ball 1 and the spherical shell 4 can prevent the deformation and cracks caused by the collision of the wear-resistant balls from being directly transmitted to the interior thereof, affecting the overall strength of the wear-resistant balls.

[0016] More specifically, the elastic buffer is a metal mesh 3 suspended and laid in the recess 100 and tensioned. Since the metal mesh 3 itself has a certain toughness, the force generated during the collision will not have too much impact on its structure.

[0017] Furthermore, the metal meshes 3 in two adjacent notches 100 are independent of each other because the wear-resistant balls make single-point contact during collision. Only part of the metal mesh 3 is deformed by force during each collision. Therefore, they are independent of each other to avoid mutual interference.

[0018] The central base ball 1 is distributed inside and outside the spherical shell 4 and has a clearance fit, so that the central base ball 1 has a certain activity space in the spherical shell 4. When the wear-resistant balls collide, the central base ball 1 can further exert force under the action of inertia, thereby improving the crushing effect.

[0019] Furthermore, the spherical shell 4 is divided into an inner cushion layer 41 and an outer reinforcement layer 42, wherein the protrusion 5 and the inner cushion layer 41 are integrally formed, and the components of the outer reinforcement layer 42 include, by weight percentage: C: 2.0-3.3%; Si: ≤1.2%; Mn: 0.3-1.5%; Cr: 18.0-23.0%; Mo: ≤3.0%; P: ≤1.0%; S: ≤0.06%; the remainder is Fe. The outer reinforcement layer 42 prepared according to this raw material ratio has good hardness, and the thickness of the outer reinforcement layer 42 is not less than the thickness of the inner cushion layer 41.

[0020] In this embodiment, the wear-resistant ball is divided into a central base ball 1 and a spherical shell 4, and an elastic buffer is provided between the central base ball 1 and the spherical shell 4 to relieve part of the force during the collision, thereby preventing the deformation and cracks caused by the collision of the wear-resistant ball from being directly transmitted to its interior, affecting the overall strength of the wear-resistant ball.

[0021] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A wear-resistant ball, characterized in that: The central base ball (1) comprises a central base ball (1), wherein the outer surface of the central base ball (1) has a plurality of ridges (2), and the ridges (2) are arranged in a staggered manner along the longitudinal and latitudinal directions of the central base ball (1) so that a plurality of recesses (100) are formed on the surface of the central base ball (1), and elastic buffers are built into the recesses (100). The central base ball (1) is covered with a spherical shell (4), and a plurality of protrusions (5) are provided on the inner side of the spherical shell (4), and the protrusions (5) are correspondingly embedded in the recesses (100) and abut against the elastic buffers. The elastic buffer is a metal wire mesh (3) which is suspended and laid in the recess (100) and is tensioned.

2. The wear-resistant ball according to claim 1, characterized in that: The metal wire meshes (3) in two adjacent notches (100) are independent of each other.

3. The wear-resistant ball according to claim 1, characterized in that: The spherical shell (4) comprises an inner cushion layer (41) and an outer reinforcement layer (42); the protrusion (5) and the inner cushion layer (41) are integrally formed, and the thickness of the outer reinforcement layer (42) is not less than the thickness of the inner cushion layer (41).

4. The wear-resistant ball according to claim 3, characterized in that: The inner cushion layer (41) is clearance-matched with the central base ball (1).

5. The wear-resistant ball according to claim 3, characterized in that: The outer reinforcement layer (42) of the spherical shell (4) comprises the following components by weight percentage: C: 2.0-3.3%; Si: ≤1.2%; Mn: 0.3-1.5%; Cr: 18.0-23.0%; Mo: ≤3.0%; P: ≤1.0%; S: ≤0.06%; and the balance is Fe.

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