The motion form of square swinging screen equipment is introduced

The square swinging screen device is symmetrical in width direction structure, so when looking for the center of mass, the center of mass can be simplified to the vertical plane perpendicular to the screen surface. Because the square swinging screen bearing parts bear the force of the screen box, so it is necessary to maintain its original structure shape as far as possible, in order to truthfully reflect the actual force of the screen box, so the bearing parts can not be simplified or ignored. As for the process parts, their main function is not to improve the structural strength, they can be ignored in the construction of finite element model.

The beam, spring support beam and side plate of the square swinging screen box are mainly connected with the flange plate through rivets. To ensure the accuracy of the model, all the parts of the model must be joined together. The connection of each part of the swinging screen in the finite element model is realized through the common area. When the grid is divided, the nodes of these common areas automatically overlap to form common nodes.

The square swinging screen can be seen as a composite structure of space plate and beam, and many swinging screens can be shortened by counting the number of shell and beam elements. However, because the square swinging screen beam element is abstracted into a straight line in the finite element model, the contact surface between the beam and the side plate is also simplified to a point, resulting in a sharp increase in the stress value of the contact part, and the calculation results are inaccurate.

The motion form of the square swinging screen is plane motion. According to the force of the square swinging screen, the screen box should vibrate in a straight line along the direction of excitation. However, the oscillating screen in the working process will be affected by many uncertain factors, resulting in the screen box may produce three-dimensional space movement. Therefore, the finite element model should consider the lateral stiffness of the spring. Since the rubber spring and the support beam are connected through the hoop, the method of creating a rigid region is adopted when the spring unit is connected with the spring support beam.

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