Multi-dimensional eddy current tuned mass damper

Abstract

The present invention discloses a multi-dimensional eddy current tuned mass damper, which belongs to the technical field of structural vibration control. A main body of the multi-dimensional eddy current tuned mass damper is composed of two hollow cylinders, wherein an inner hollow cylinder is located in an outer hollow cylinder, ball grooves are formed in the opposite upper and lower walls of the inner and outer hollow cylinders, rolling balls are installed in the ball grooves, and the inner hollow cylinder is rotated in the outer hollow cylinder through the rolling balls; the inner hollow cylinder is provided with an inner cover plate, and the outer hollow cylinder is provided with an outer cover plate, forming a relatively closed box body structure; an orthogonal bidirectional mass element, a stiffness element and an eddy current damping element are arranged in the inner hollow cylinder, and a torsional stiffness element and an eddy current damping element are arranged between the inner hollow cylinder and the outer hollow cylinder. The multi-dimensional eddy current tuned mass damper of the present invention is not only convenient to adjust in terms of mass, stiffness and damping parameters, but also has regular and beautiful appearance, simple structure, and very simple connection with a main structure.

Claims

1. A multi-dimensional eddy current tuned mass damper, comprising hollow cylinders, cover plates, rolling balls, a copper ring (2), connecting plates (4), permanent magnets (5), mass blocks (8), limiting angle steels (9), copperplates (10), vertical poles (11), horizontal poles (12), tension springs (13) and torsion springs (15); a main body of the multi-dimensional eddy current tuned mass damper is composed of two hollow cylinders, wherein an inner hollow cylinder (3) is located in an outer hollow cylinder (1), ball grooves a (19) are formed in the opposite upper and lower walls of the inner and outer hollow cylinders, rolling balls a (6) are installed in the ball grooves a (19), and the inner hollow cylinder (3) is rotated in the outer hollow cylinder (1) through the rolling balls a (6); the inner hollow cylinder (3) is provided with an inner cover plate (18), and the outer hollow cylinder (1) is provided with an outer cover plate (17), forming a relatively closed box body structure; an orthogonal bidirectional mass element, a stiffness element and an eddy current damping element are arranged in the inner hollow cylinder (3), and a torsional stiffness element and an eddy current damping element are arranged between the inner hollow cylinder (3) and the outer hollow cylinder (1); the orthogonal bidirectional mass element is mainly composed of the connecting plates (4) and the mass blocks (8), two connecting plates (4) are horizontal and perpendicular to each other to form a cross, and both ends of each connecting plate are fixedly connected with the mass blocks (8); ball grooves b (7) are formed in the mass blocks (8) and the opposite upper and lower walls of the inner hollow cylinder (3), rolling balls b (14) are installed in the ball grooves b (7), the mass blocks (8) slide in the inner hollow cylinder (3) through the rolling balls b (14), and the limiting angle steels (9) are arranged on both ends of each mass block (8) along the moving direction to avoid collision between adjacent mass blocks (8); the stiffness element is mainly composed of the vertical poles (11), the horizontal poles (12) and the tension springs (13), each horizontal pole (12) penetrates through a pore canal preformed in the connecting plates (4), and the horizontal poles (12) are parallel to the motion track of each corresponding mass block (8); the tension springs (13) are sheathed on both ends of each horizontal pole (12) and limited between the connecting plates (4) and the vertical poles (11); both ends of each vertical pole (11) are respectively in rigid connection with the horizontal poles (12) and the bottom surface of the inner hollow cylinder (3); the eddy current damping element in the inner hollow cylinder (3) is mainly composed of the permanent magnets (5) and the copperplates (10), the permanent magnets (5) are embedded in pore spaces preformed in a side wall of the inner hollow cylinder (3), and the copperplates (10) are fixed on one side of each mass block (8); the torsional stiffness element is composed of the torsion springs (15) which are respectively fixed between the inner cover plate (18) and the outer cover plate (17) and between the bottom of the inner hollow cylinder (3) and the bottom of the outer hollow cylinder (1); the eddy current damping element in the outer hollow cylinder (1) is mainly composed of the permanent magnets (5) and the copper ring (2), and the copper ring (2) is fixed on an inner wall of the outer hollow cylinder (1).

2. The multi-dimensional eddy current tuned mass damper according to claim 1, wherein the outer hollow cylinder (1), the inner hollow cylinder (3), the connecting plates (4) and the mass blocks (8) are all made of magnetic conductive materials; and the rolling balls are spherical steel balls.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a global three-dimensional diagram of a multi-dimensional eddy current tuned mass damper provided in embodiments of the present invention;

(2) FIG. 2 is an A-A sectional view of a multi-dimensional eddy current tuned mass damper provided in embodiments of the present invention;

(3) FIG. 3 is a B-B sectional view of a multi-dimensional eddy current tuned mass damper provided in embodiments of the present invention;

(4) FIG. 4 is a C-C sectional view of a multi-dimensional eddy current tuned mass damper provided in embodiments of the present invention;

(5) In the drawings: 1 outer hollow cylinder; 2 copper ring; 3 inner hollow cylinder; 4 connecting plate; 5 permanent magnet; 6 rolling ball a; 7 ball groove b; 8 mass block; 9 limiting angle steel; 10 copperplate; 11 vertical pole; 12 horizontal pole; 13 tension spring; 14 rolling ball b; 15 torsion spring; 16 bolt; 17 outer cover plate; 18 inner cover plate; and 19 ball groove a;

DETAILED DESCRIPTION

(6) To make a purpose, characteristics and advantages of the present invention more clear and legible, the technical solution in the embodiments of the present invention will be clearly and fully described below in combination with the drawings in the embodiments of the present invention. Apparently, the described embodiments are merely part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those ordinary skilled in the art without contributing creative labor will belong to the protection scope of the present invention.

(7) Refer to FIG. 1 to FIG. 4, an embodiment of a multi-dimensional eddy current tuned mass damper provided in embodiments of the present invention, comprising an outer hollow cylinder 1, a copper ring 2, an inner hollow cylinder 3, connecting plates 4, permanent magnets 5, rolling balls a 6, ball grooves b 7, mass blocks 8, limiting angle steels 9, copperplates 10, vertical poles 11, horizontal poles 12, tension springs 13, rolling balls b 14, torsion springs 15, bolts 16, an outer cover plate 17, an inner cover plate 18 and ball grooves a 19.

(8) In the embodiment, the outer hollow cylinder 1 and the outer cover plate 17 are connected by bolts 16 to form an outer box body, the inner hollow cylinder 3 and the inner cover plate 18 are connected by bolts 16 to form an inner box body, and the inner box body is rotated in the ball grooves a 19 formed in upper and lower inner walls of the outer box body through the rolling balls a 6;

(9) The connecting plates 4 are placed horizontally and perpendicular to each other to form a cross, both ends of each connecting plate are fixedly connected with the mass blocks 8, the mass blocks 8 slide in the ball grooves b 7 formed in upper and lower inner walls of the inner box body through the rolling balls b 14, and the limiting angle steels 9 are arranged on both ends of each mass block 8 along the moving direction to avoid collision between adjacent mass blocks 8;

(10) The permanent magnets 5 are embedded in pore spaces preformed in a side wall of the inner box body, the copperplates 10 are fixed on one side of each mass block 8, and the copper ring 2 is fixed on an inner wall of the outer box body;

(11) The horizontal poles 12 penetrate through pore canals preformed in the connecting plates 4 and are parallel to the motion tracks of the mass blocks 8, the tension springs 13 are sheathed on the horizontal poles 12 and arranged on both sides of each connecting plate 4, and both ends of each vertical pole 11 are respectively in rigid connection with the horizontal poles 12 and the bottom surface of the inner box body;

(12) One torsion spring 15 is fixed between the inner cover plate 18 and the outer cover plate 17, and the other torsion spring 15 is fixed between the bottom of the outer hollow cylinder 1 and the bottom of the inner hollow cylinder 3;

(13) The outer hollow cylinder 1, the inner hollow cylinder 3, the outer cover plate 17, the inner cover plate 18, the mass blocks 8 and the connecting plates 4 are all made of magnetic conductive materials; and the rolling balls a 6 and the rolling balls b 14 are spherical steel balls.

(14) In the embodiment, the mass element is composed of the mass blocks 8 and the connecting plates 4; the stiffness element is composed of the horizontal poles 12, the vertical poles 11 and the tension springs 13; the eddy current damping element in the inner box body is composed of the permanent magnets 5 and the copperplates 10; the torsional stiffness element is composed of the torsion springs 15; and the eddy current damping element in the outer box body is composed of the permanent magnets 5 and the copper ring 2. When the structure is subject to multi-dimensional vibration, the horizontal vibration component can be controlled by the mass element, the stiffness element and the eddy current damping element in the inner box body, and the torsional vibration component can be controlled by the torsional stiffness element and the eddy current damping element in the outer box body. The multi-dimensional eddy current tuned mass damper of the present invention is convenient to adjust in terms of mass, stiffness and damping parameters. the mass parameter of the damper can be controlled by adjusting the mass of the mass blocks 8; the stiffness parameter of the damper can be controlled by adjusting the tension springs 13 and the torsion springs 15; and the damping parameter can be adjusted by adjusting the distance between the permanent magnets 5 and the copper ring 2 or copperplates 10, or adjusting the magnetic field intensity of the permanent magnets 5.

(15) It should be noted during the design of the present invention that: first, the limiting angle steels 9 should have sufficient strength and stiffness to prevent the mass blocks 8 from colliding with the limiting angle steels and being damaged, and the limiting angle steels can also be covered with rubber pads on the surface for protection and energy dissipation; second, the rolling balls a 6 and the rolling balls b 14 are respectively embedded in the ball grooves a 19 and the ball grooves b 7, lubricating oil is appropriately applied in the ball grooves a 19 and the ball grooves b 7 to facilitate ball rolling, and the size and quantity of the rolling balls can be adjusted as required since the rolling balls a 6 bear the weight of the whole inner box body; and third, the layout position of the present invention in an engineering structure should be reasonably arranged according to the corresponding vibration reduction scheme and control objective.

(16) The above embodiments are only used for describing the technical solution of the present invention rather than limiting the same. Although the present invention is described in detail by referring to the above embodiments, those ordinary skilled in the art should understand that: the technical solution recorded in each of the above embodiments can be still amended, or some technical features therein can be replaced equivalently. However, these amendments or replacements do not enable the essence of the corresponding technical solution to depart from the spirit and the scope of the technical solution of various embodiments of the present invention.