CN202484183U - Electromagnetic fluid damper - Google Patents

Abstract

The utility model relates to an electromagnetic fluid damper, comprising upper and lower parts independent of each other, the upper part includes: an upper disc flange (1), an electromagnet block (9), a first pressing block (4); the electromagnet block The first pressing block (4) is fixed in the flange of the upper disc; the lower part of the damper includes: a disc (10), a lower disc flange (19) opposite to the disc, connecting the disc to the lower part The hydraulic cylinder (11) connected to the disc flange without leakage, the lower disc flange, the disc and the hydraulic cylinder form a closed non-leakage space, and the damping fluid (12) fills the closed non-leakage space; the lower part of the damper The part also includes a piston (14), a round shaft (7), a first spring (8), a second spring (20), a permanent magnet block (17), and a second pressing block (13), and at the center of the piston (14) There is a round hole (21) at the center, which uses magnetic force and spring to push the piston in the damper to move. When the piston moves, the damping fluid flows through the small round through hole on the piston, and energy is consumed when the damping fluid flows through the small round through hole on the piston. .

Description

An electromagnetic fluid damper

technical field

The utility model provides an electromagnetic fluid damper, which belongs to the technical field of structural vibration control.

Background technique

The fluid damper is an effective structural damper, but during the working process of the fluid damper, there is a possibility of fluid leakage in the fluid damper. limit. The utility model provides an electromagnetic fluid damper, which is not prone to liquid leakage faults.

Contents of the invention

Technical problem: The purpose of this utility model is to create a non-leakage fluid damper, which is especially suitable for structural vibration control under the condition that no leakage is allowed.

Technical solution: The utility model selects non-magnetic material, damping liquid, electromagnet block and permanent magnet block as the basic materials of the electromagnetic fluid damper, and the damping liquid is filled in the closed hydraulic cylinder. Specifically, the spring and magnetic force are used to push the piston to move. When the piston moves, the damping fluid passes through the small hole (damping hole) on the piston to dissipate the structural vibration energy.

The damper includes upper and lower parts which are independent of each other. The upper part includes: an upper disc flange, an electromagnet block, and a first pressing block; the electromagnet block is fixed in the upper disc flange through the first pressing block;

The lower part of the damper includes: a disc, a lower disc flange opposite to the disc, a hydraulic cylinder connecting the disc to the lower disc flange without leakage, and the lower disc flange, disc and hydraulic cylinder A closed non-leakage space filled with damping fluid;

The lower part of the damper also includes a piston, a circular shaft, a first spring, a second spring, a permanent magnet block, and a second pressure block. A circular hole is arranged at the center of the piston, and the circular shaft passes through the circular hole of the piston. The lower end surface of the shaft is connected to the flange of the lower disc without leakage, and the upper end surface of the circular shaft is flush with the outer surface of the disc without leakage; the piston moves along the axial direction of the hydraulic cylinder, and the piston is placed between the first spring and the second spring. In the middle of the hydraulic cylinder, the lower end of the first spring is connected to the upper surface of the piston, the upper end of the first spring is connected to the upper part of the circular shaft, one end of the second spring is connected to the lower surface of the piston, and the other end of the second spring is connected to the upper surface of the piston. The lowermost ends of the circular shafts are connected; the permanent magnet block is fixed in the piston through the second pressing block, and a small round through hole is opened on the piston, and the line of action of the resultant force of the damping force generated when the damping fluid flows through the small round through hole is in line with the circle The shaft axes are coincident.

The distance between the upper end of the first spring and the upper end surface of the circular shaft is the thickness of the disk.

The axis of the upper disc flange, the axis of the disc, the axis of the hydraulic cylinder, and the axis of the piston coincide with the axis of the circular shaft; the line of action of the force of the first spring on the piston coincides with the axis of the piston; The line of action of the active force coincides with the axis of the piston; the line of action of the resultant force of the electromagnet block is coincident with the axis of the circular shaft; the line of action of the resultant force of the permanent magnet block is coincident with the axis of the circular shaft.

The electromagnet block achieves the purpose of changing the direction and strength of the electromagnetic field generated by the electromagnet block by adjusting the magnitude and direction of the current, and then actively adjusts the magnitude and direction of the magnetic force received by the permanent magnet block to achieve the purpose of active vibration control .

When in use, the upper disc flange (or the lower disc flange) is fixed on the vibration body by bolts, and the lower disc flange (or the upper disc flange) is fixed on the stationary foundation by bolts.

Beneficial effects: the hydraulic cylinder, the lower disc flange, and the disc form a leak-free airtight space, and the piston is pushed by magnetic force and springs to move along the circular axis in this airtight space. When the piston moves, the damping fluid flows through the small round channel on the piston. When the damping fluid flows through the small round hole on the piston, it consumes energy, which has the effect of suppressing vibration. Since the piston only moves in a leak-free airtight space and no dynamic seal is used, the electromagnetic fluid damper does not have liquid leakage in the vibration control process of a common electromagnetic fluid damper.

Description of drawings

Fig. 1 is a front view sectional structural schematic diagram of an electromagnetic fluid damper;

Fig. 2 is the bottom view of the upper disc flange 1;

Fig. 3 is a schematic structural view of the first T-shaped columnar groove 27 of the upper disc flange 1;

Fig. 4 is a schematic cross-sectional structure diagram of the A-A direction of the upper disc flange 1 in Fig. 2;

Fig. 5 is the A-A sectional view of the upper disc flange 1 with the electromagnet block 9 installed in Fig. 2;

Fig. 6 is the top view of piston 14 among Fig. 1;

FIG. 7 is a schematic structural view of the second T-shaped columnar groove 30 of the piston 14 in FIG. 6;

Figure 8 is a B-B cross-sectional view of the piston 14 in Figure 6;

Fig. 9 is the B-B direction sectional view of the piston 14 that columnar permanent magnet block 17 is installed among Fig. 6;

In the above figure, there are: upper disc flange 1, first bolt hole 2, first bolt 3, first pressure block 4, first light hole 5, first threaded hole 6, round shaft 7, first spring 8 , electromagnet block 9, disc 10, hydraulic cylinder 11, damping fluid 12, second column pressure block 13, piston 14, second light hole 15, second threaded hole 16, permanent magnet block 17, second bolt hole 18 , lower disc flange 19, second spring 20, round hole 21, small round through hole 22, second bolt 23, negative lead 24, positive lead 25, external power supply 26, first T-shaped columnar slot 27,

The first T-shaped columnar groove 27 top width is less columnar groove 28, the first T-shaped columnar groove 27 bottom width is larger columnar groove 29, the second T-shaped columnar groove 30, the second T-shaped columnar groove 30 upper width is smaller A large columnar groove 31 , a columnar groove 32 with a smaller width at the bottom of the second T-shaped columnar groove 30 , a third light hole 33 , and a fourth light hole 34 .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

The utility model proposes an electromagnetic fluid damper, which uses magnetic force and a spring to push the piston in the damper to move. When the piston moves, the damping fluid flows through the small round hole (damping hole) on the piston, and the damping fluid flows through the small round hole (damping hole) on the piston. Small round through holes (damping holes) dissipate energy while controlling vibration.

The following descriptions of embodiments of the invention are merely exemplary in nature, and are in no way intended to limit the application or uses of the invention.

The upper surface of the piston 14 on the electromagnetic fluid damper has a second T-shaped columnar groove 30, and the second T-shaped columnar groove 30 is composed of a columnar groove 32 with a lower width of the second T-shaped columnar groove 30 and a second T-shaped columnar groove 30. The columnar groove 31 that the upper width of the upper part of the T-shaped columnar groove 30 is wider is formed; The size of the smaller columnar groove 32 with the lower width of the second T-shaped columnar groove 30 is the same; The lower surface of 17 fits with the lower surface of the second T-shaped columnar groove 30, that is, the lower surface of the columnar permanent magnet block 17 fits with the lower surface of the lower columnar groove 32 of the lower width of the second T-shaped columnar groove 30; The magnetic pole of columnar permanent magnet block 17 is on two end faces up and down; The shape of the second columnar pressing block 13 is identical with the shape of the larger columnar slot 31 of the upper width of the second T-shaped columnar slot 30, and the size of the second columnar pressing block 13 The same size as the larger columnar groove 31 of the second T-shaped columnar groove 30; the second threaded holes 16 are evenly distributed along a circumferential line of the larger columnar groove 31 of the second T-shaped columnar groove 30; The second optical hole 15 is evenly distributed on a circumferential line of the second columnar pressing block 13; the second columnar pressing block 13 is placed in the larger columnar groove 31 of the upper part of the second T-shaped cylindrical groove 30, and the second columnar pressing block The lower surface of 13 is attached to the upper surface of columnar permanent magnet block 17, and the upper surface of second columnar pressing block 13 is flush with the upper surface of piston 14; The number of the second threaded holes 16 of the second T-shaped columnar groove 30 of the piston 14 is the same, and the axis of the second light hole 15 on the second columnar pressing block 13 is the same as the second screw thread of the second T-shaped columnar groove 30 of the piston 14. The axes of the holes 16 are coincident; the second threaded hole 16 can be screwed into the second threaded hole 16 through the second light hole 15 with the second bolt 23 end; the second columnar pressing block 13 can be compressed; Shaped columnar groove 27, the first T-shaped columnar groove 27 is made up of columnar groove 28 with the smaller width of the upper part of the first T-shaped columnar groove 27 and the larger columnar groove 29 of the bottom width of the first T-shaped columnar groove 27; The shape of the iron block 9 is identical to the shape of the smaller columnar groove 28 of the upper width of the first T-shaped columnar groove 27, and the size of the columnar electromagnet block 9 is less than the columnar groove 28 of the first T-shaped columnar groove 27. The same size; the columnar electromagnet block 9 is placed in the columnar groove 28 with a smaller upper width of the first T-shaped columnar groove 27, and the upper surface of the columnar electromagnet block 9 is attached to the upper surface of the first T-shaped columnar groove 27 , that is, the upper surface of the columnar electromagnet block 9 fits with the upper surface of the columnar groove 28 with a smaller upper width of the first T-shaped columnar slot 27; the two magnetic poles of the columnar electromagnet block 9 are on the upper and lower end faces; the first The shape of the columnar pressing block 4 is identical to the shape of the larger columnar groove 29 of the lower width of the first T-shaped columnar groove 27, and the size of the first columnar pressing block 4 is smaller than the lower width of the first T-shaped columnar groove 27. The size of the large columnar groove 29 is the same; the first threaded hole 6 is evenly distributed along a circumferential line of the larger columnar groove 29 of the bottom width of the first T-shaped columnar groove 27; Uniformly distribute the first optical holes 5; the first columnar pressing block 4 is placed in the larger columnar slot 29 of the lower part of the first T-shaped columnar slot 27, the upper surface of the first columnar pressing block 4 and the columnar electromagnet block 9 The lower surface is attached, and the lower surface of the first columnar pressing block 4 is flush with the lower surface of the upper disc flange 1; The number of the first threaded holes 6 of the first T-shaped columnar groove 27 is the same, and the axis of the first light hole 5 on the first columnar pressing block 4 is the same as the first T-shaped columnar groove 27 of the upper disc flange 1. The axes of the threaded holes 6 coincide; the first bolt 3 is screwed into the first threaded hole 6 through the first light hole 5, and the first columnar pressing block 4 can be compressed; the first columnar pressing block 4 is also provided with a third light Hole 33, the 4th optical hole 34, the negative wire 24 on the columnar electromagnet block 6 passes through the 3rd optical hole 34 and is connected with the negative pole of external power supply 26, the positive wire 25 on the columnar electromagnet block 6 passes through the 4th optical hole 33 is connected to the positive pole of the external power supply 26; the upper surface of the lower disc flange 19 is connected to the lower end surface of the hydraulic cylinder 11 without leakage, and the lower end surface of the disc 10 is connected to the upper end surface of the hydraulic cylinder 11 without leakage. The end face is connected to the lower disc flange 19 without leakage, the upper end face of the circular shaft 7 is flush with the upper end face of the disc 10 and is connected without leakage, and the lower disc flange 19 is connected to the hydraulic cylinder 11, the disc 10 and the circular shaft 7 A closed non-leakage space filled with damping fluid 12 is closed; the second bolt holes 18 are evenly distributed along a circumferential line on the lower disc flange 19, and the second bolt holes 18 are distributed outside the hydraulic cylinder 11; the circular shaft 7 passes through Piston 14, first spring 8 and second spring 20; piston 14 is located at the middle of hydraulic cylinder 11; Connected, the distance between the upper end of the first spring 8 and the upper end surface of the round shaft 7 is the thickness of the disc 10; one end of the second spring 20 is connected to the lower surface of the piston 14, and the other end of the second spring 20 is connected to the round shaft 7 The lowermost end of the cylindrical surface is connected; the vibration direction of the vibrating body coincides with the axis of the hydraulic cylinder 11 during use; the upper disc flange 1 is fixed on the vibrating body with bolts through the first bolt hole 2 on it, and the lower disc method The flange 19 is fixed on the stationary foundation with bolts through the second bolt hole 18 thereon, and the distance between the lower surface of the upper disk flange 1 and the upper surface of the disk 10 is greater than the maximum vibration displacement of the vibrating body relative to the foundation; Sometimes or the lower disc flange 19 is fixed on the vibrating body with bolts through the second bolt hole 18 thereon, and the upper disc flange 1 is fixed on the stationary foundation with bolts through the first bolt hole 2 thereon, The distance between the lower surface of the lower disc flange 19 and the upper surface of the upper disc flange 1 is greater than the maximum vibration displacement of the vibrating body relative to the foundation; the axis of the upper disc flange 1, the axis of the lower disc flange 19, Axis of hydraulic cylinder 11, axis of disc 10 , The axis of the piston 14 coincides with the axis of the circular shaft 7.

Except for the electromagnet block 9 and the permanent magnet block 17, each part of the damper is made of non-ferromagnetic metal or alloy material (such as aluminum alloy, stainless steel, etc.), and the electromagnet block 9 and the permanent magnet block 17 are both Columnar magnet block (as cylindrical electromagnet block 9, cylindrical permanent magnet block 17), all springs are selected circular spring form. A specific manufacturing process of the electromagnetic fluid damper can be carried out in the following steps:

The first step: according to the vibration control requirements, select the upper disc flange 1, the first columnar pressure block 4, the circular shaft 7, the first spring 8, the columnar electromagnet block 9, the disc 10, the hydraulic cylinder 11, the second Columnar pressing block 13, piston 14, columnar permanent magnet block 17, bottom disc flange 19, the second spring 20, the first T-shaped columnar groove 27, the size of the second T-shaped columnar groove 30 and circular hole 21; Silicone oil is used as the damping fluid 12; according to the vibration control requirements, select the first bolt hole 2, the first light hole 5, the first threaded hole 6, the second light hole 15, the second threaded hole 16, the second bolt hole 18 and the small The number, location and size of the round through holes 22. For example: according to the installation requirement that the piston 14 is located in the middle of the hydraulic cylinder 11 after the damper is installed, after the damper is installed, the piston 14 is in a state of force balance under the combined action of the magnetic force and the first spring 8 and the second spring 20 , the parameters of the first spring 8 and the second spring 20 are determined by conventional mechanical calculations. When the vibration is simple harmonic vibration, the height of the hydraulic cylinder 11 is not less than twice the maximum vibration displacement of the vibrating body.

Second step: the round shaft 7 passes through the round hole 21 of the piston 14, one end of the first spring 8 is welded on the upper surface of the piston 14, and the other end of the first spring 8 is welded on the top of the cylindrical surface of the round shaft 7, The distance between the upper end of the first spring 8 and the upper end surface of the circular shaft 7 is the thickness of the disc 10; one end of the second spring 20 is welded on the lower surface of the piston 14, and the other end of the second spring 20 is welded on the circular shaft 7. The lowest end of the cylindrical surface; before and after welding, the axis of the circular shaft 7, the axis of the piston 14, the axis of the first spring 8 and the axis of the second spring 20 must be coincident; after welding, the effect of the first spring 8 on the piston 14 must be ensured The line of action of the force coincides with the axis of the piston 14 ; the line of action of the force of the second spring 20 on the piston 14 coincides with the axis of the piston 14 .

The third step: the columnar permanent magnet piece 17 is placed in the columnar groove 32 with less width at the bottom of the second T-shaped columnar groove 30 of the piston 14, and the magnetic pole south pole of the columnar permanent magnet piece 17 faces upward and the north pole is downward; The lower surface of block 17 is bonded to the lower surface of the second T-shaped columnar groove 30, that is, the lower surface of the columnar permanent magnet block 17 is bonded to the lower surface of the lower columnar groove 32 of the lower width of the second T-shaped columnar groove 30 ; The second columnar briquetting block 13 is placed in the larger columnar groove 31 of the upper width of the second T-shaped columnar groove 30, the lower surface of the second columnar briquetting block 13 is bonded to the upper surface of the columnar permanent magnet block 17, the second The upper surface of two columnar pressing blocks 13 is flush with the upper surface of piston 14; The axes of 16 are coincident; the second bolt 23 is passed through the second light hole 15 and screwed into the second threaded hole 16 and tightened to compress the second columnar pressing block 13.

Step 4: Weld the lower end surface of the circular shaft 7 to the upper surface of the lower disc flange 19, and ensure that the axis of the lower disc flange 19 coincides with the axis of the circular shaft 7 before and after welding.

Step 5: Set the hydraulic cylinder 11 outside the piston 14, and weld the lower end surface of the hydraulic cylinder 11 to the upper surface of the lower disc flange 19. Before and after welding, the axis of the lower disc flange 19 and the position of the hydraulic cylinder 11 must be ensured. The axes coincide.

Step 6: Drill a circular hole a at the center of the disc 10, the diameter of the circular hole a is slightly larger than the diameter of the circular shaft 7 (take the specific value according to the conventional welding specification), and the axis of the circular hole a coincides with the axis of the disc 10 On the disc 10 about the axis symmetry of disc 10 drills small circular hole b and small circular hole c, the respective axes of small circular hole b and small circular hole c are equal to the distance of the axis of disc 10 from the axis of hydraulic cylinder 11 Half of the sum of the inner radius and the radius of the circular hole a, the half of the small circular hole b and the small circular hole c are less than one-half of the value of the inner radius of the hydraulic cylinder 11 minus the radius of the circular hole a.

The seventh step: then insert the top of the circular shaft 7 into the circular hole a drilled in the sixth step, and place the lower surface of the disc 10 on the upper end surface of the hydraulic cylinder 11 . Weld the upper end surface of the hydraulic cylinder 11 to the lower surface of the disc 10, and then weld the upper end surface of the circular shaft 7 and the disc 10 at the hole a drilled in the sixth step, and ensure the hydraulic cylinder 11 before and after welding. The axis, the axis of the disk 10, and the axis of the circular shaft 7 coincide.

Step 8: Use a funnel to use silicone oil as the damping fluid to fill the hydraulic cylinder 11 through the small round hole b drilled in the sixth step. After observing that the damping fluid has filled the hydraulic cylinder 11 through the small round hole b and the small round hole c, then Weld and block the small round hole b and c drilled in the sixth step.

Step 9: Place the columnar electromagnet block 9 in the columnar slot 28 with a smaller width on the upper part of the first T-shaped columnar slot 27 of the upper disc flange 1, and the magnetic pole of the columnar electromagnet block 9 faces up and the north pole faces down The upper surface of the columnar electromagnet block 9 fits with the upper surface of the first T-shaped columnar slot 27, that is, the upper surface of the columnar electromagnet block 9 and the less columnar slot 28 of the upper width of the first T-shaped columnar slot 27 The upper surface fits; the first columnar briquetting block 4 is placed in the larger columnar groove 29 of the bottom width of the first T-shaped columnar groove 27, the upper surface of the first columnar briquetting block 4 and the lower surface of the columnar electromagnet block 9 Fitting, the lower surface of the first columnar pressing block 4 is flush with the lower surface of the upper disc flange 1; The axes of the first threaded hole 6 of a T-shaped columnar groove 27 are aligned (coincident); the bolt is passed through the first light hole 5 and screwed into the first threaded hole 6 and tightened to compress the first columnar pressure block 4 .

Step 10: pass the positive lead 25 on the columnar electromagnet block 9 out of the third light hole 33 on the first columnar pressing block 4, and connect to the positive pole of the external power supply 26; connect the negative lead on the columnar electromagnet block 9 24 passes through the fourth optical hole 34 on the first columnar pressing block 4 and is connected to the negative pole of the external power supply 26 .

So far, the invention of this electromagnetic fluid damper can be realized.   

Claims (4)

1. an electromagnetic fluid damper is characterized in that this damper comprises separate two-part up and down, and top comprises: top disc flange (1), electromagnet block (9), first briquetting (4); Electromagnet block (9) is fixed in the top disc flange (1) through first briquetting (4);

This damper bottom comprises: disk (10), the lower disk flange (19) that is oppositely arranged with disk (10), disk (10) and lower disk flange (19) do not had leak the oil hydraulic cylinder (11) that is connected; Lower disk flange (19), disk (10) and oil hydraulic cylinder (11) are formed closed no leakage space, and damp liquid (12) is full of this closed no leakage space;

Said damper bottom also comprises piston (14), circular shaft (7), first spring (8), second spring (20), permanent magnetic iron block (17), second briquetting (13); Circle centre position at piston (14) is provided with circular hole (21); Circular shaft (7) passes the circular hole (21) of piston (14); Circular shaft (7) lower end surface does not have leakage with lower disk flange (19) and is connected, and the upper-end surface of circular shaft (7) flushes with the outer surface of disk (10) and do not have to leak and is connected; Piston (14) is along oil hydraulic cylinder (11) axial motion; Piston (14) places the middle part of oil hydraulic cylinder (11) through first spring (8) and second spring (20); Wherein the lower end of first spring (8) is connected with piston (14) upper surface; The upper end of first spring (8) is connected with the top of circular shaft (7), and an end of second spring (20) is connected with piston (14) lower surface, and the other end of second spring (20) is connected with circular shaft (7) bottom; Permanent magnetic iron block (17) is fixed in the piston (14) through second briquetting (13); Have little round tube hole (22) on the piston (14), and the line of action of making a concerted effort of the damping force that when damp liquid (12) flows through little round tube hole (22), produces and the dead in line of circular shaft (7).

2. a kind of electromagnetic fluid damper according to claim 1 is characterized in that: the distance that the upper-end surface of circular shaft (7) is left in the upper end of first spring (8) is the thickness of disk (10).

3. a kind of electromagnetic fluid damper according to claim 1 is characterized in that: the axis of the axis of the axis of top disc flange (1), disk (10), the axis of oil hydraulic cylinder (11), piston (14) and the dead in line of circular shaft (7); First spring (8) is to the dead in line of the effect line of action of force and the piston (14) of piston (14); Second spring (20) is to the dead in line of the effect line of action of force and the piston (14) of piston (14); The line of action of making a concerted effort of the suffered magnetic force of electromagnet block (9) and the dead in line of circular shaft (7); The line of action of making a concerted effort of the suffered magnetic force of permanent magnetic iron block (17) and the dead in line of circular shaft (7).

4. a kind of electromagnetic fluid damper according to claim 1; It is characterized in that: said electromagnet block (9); Size and Orientation through the adjustment electric current reaches the direction and strong and weak purpose that changes the electromagnetic field that electromagnet block (9) produced; And then the size and Orientation of the suffered magnetic force of active adjustment permanent magnetic iron block (17), reach the purpose of Active Vibration Control.

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