jaw crusher machinery

30The present invention also provides a method of crushing material wherein material is introduced between the first rotary crushing blade and the second rotary crushing blade, and the second crushing blade is moved linearly reciprocate relative to the first crushing blade, and the axis of rotation of the crushing blades is parallel to the direction of linear motion, the reciprocation being substantially harmonic. 5The present invention also provides a method of controlling a crusher, the crusher including at least a first rotary crushing blade and a second crushing blade, further arranged to reciprocate along a linear path, and the rotating axes of the first crushing blade and the second crushing blade are parallel to the direction of linear motion of the second crushing blade, wherein the second crushing blade is arranged to move substantially harmonically along a linear path. 

The linear motion of the second crushing blade is essentially harmonic; that is, when the direction of motion is changed, the motion speed is accelerated under control to a maximum speed, then the speed is slowed down under control before the change in direction of motion. Harmonic motion imposes significantly less load on the structures than reciprocating motion 20 which is not slowed down before the change in direction of motion. 

This has an advantageous effect on the strength and/or dimensions of the crusher. In an advantageous embodiment, the linear and essentially harmonic motion 25 of the second crushing blade is performed by an eccentric. In one embodiment, the motion of the eccentric shaft is transmitted to the second crushing blade by means of a slide. In another embodiment, the motion of the eccentric shaft is transmitted to the second crushing blade by means of a connecting rod. 30 In an advantageous embodiment, the crushing blades are arranged such that the first crushing blade is above and the second crushing blade is below. 

Thus, the linear motion of the crusher changes the gap between the lower surface of the first crushing blade and the upper surface of the second crushing blade. The size of the gap changes in an essentially harmonic manner. 

The different embodiments of the embodiment described above, taken individually and in various combinations, provide various advantages. The advantage of one embodiment of the invention over a conventional crusher is the 4 to 5 times faster crushing function, which is achieved by increasing the acceleration of the material to be crushed in the cavity.

The flow of the material to be crushed between the crushing blades 1, 2 is also affected by the angles of the crushing blades. Advantageously, the surface of the first crushing blade 1 is at an angle 5 perpendicular to the rotation axis X and the linear crushing motion. The surface of the first crushing blade 1 may also be at another angle to the rotation axis X and the linear crushing motion. 

For example, it may be at an angle of approximately 75 to 90* to the rotation axis and the linear crushing motion, so that when viewed from the direction from which the material to be crushed is supplied, the perpendicular distance of the rotation axis from the surface of the crushing blade increases. The surface of the second crushing blade 2 may be at an angle perpendicular to the rotation axis X and the linear crushing motion, or the surface 15 may be at different angles to the rotation axis X and the linear crushing motion. 

The appropriate angle of the surface of the second crushing blade 2 is affected, inter alia, by the surface angle of the first crushing blade 1 and the rotation speed of the crushing blades 1, 2, as well as the desired path and speed of propagation of the material to be crushed. It is recommended that the angles of the crushing blades 1, 2 be selected according to the material to be crushed and the crushing speed. Preferably, the angle between the opposite surfaces of the first crushing blade 1 and the second crushing blade 2 is about 10 to 300. 25 In the example of FIG. 8, the conical surfaces of the crushing blades 1, 2 are at inclined angles in different directions with respect to the rotation axis X. The surface of the first crushing blade 1 is at an angle of about 750 with respect to the rotation axis X and the linear crushing motion. 

The surface of the second crushing blade is at an angle of about 750 with respect to the rotation axis X and the linear crushing motion. The centerline of the crushing chamber is substantially perpendicular to the rotation axis X in the example, and the angle between the first crushing blade 1 and the second crushing blade 2 is about 300 degrees. 

The inclination of the crushing blades 1, 2 shown in FIG. 8 is suitable, for example, for stone crusher applications where the rotation speed of the crushing blades is high, for example 100 to 200 revolutions per minute. In the example of FIG. 3, the conical surfaces of the crushing blades 1, 5 2 are at oblique angles in the same direction with respect to the rotation axis X. 

The surface of the first crushing blade 1 is at an angle of about 450 to the rotation axis X and the linear crushing motion. The surface of the second crushing blade is at an angle of about 700 to the rotation axis X and the linear crushing motion. The centerline of the crushing chamber 10 is at an angle of about 500 in the example, and the angle between the first crushing blade 1 and the second crushing blade 2 is about 200. Advantageously, the first crushing blade 1 is at an angle of about 45 to 700 to the rotation axis X, and the second crushing blade 2 is at an angle of about 55 to 800 to the rotation axis. At smaller angles and smaller rotational speeds, it is possible to increase the effect of gravity on the passage of the material flow, and accordingly, at larger angles and larger rotational speeds, the effect of centrifugal force on the passage of the material flow increases. 

The inclination of the crushing blades 1, 2 20 shown in Figure 3 is suitable, for example, for stone crushing applications where the rotational speed of the crushing blades is low, for example 60 to 100 revolutions per minute. In one embodiment, the surface of the first crushing blade 1 is at a right angle of 25 to the axis of rotation. The surface of the second crushing blade 2 is at an inclined angle to the axis of rotation X. The surface of the second crushing blade 2 is at an angle of approximately 700 to the axis of rotation X and the linear crushing movement. 

The distance of the first crushing blade 1 from the surface of the second crushing blade 2 in the direction of the axis of rotation X is greater near the material inlet than away from the material inlet. In other words, the distance of the first crushing blade 1 from the surface of the second crushing blade 2 in the X direction of rotation axis decreases when viewed from the feeding direction of the material to be crushed. The angle between the first crushing blade 1 and the second crushing blade 2 is about 200.