CN212839102U

CN212839102U - Airborne vibration isolator

Info

Publication number: CN212839102U
Application number: CN202021390371.2U
Authority: CN
Inventors: 季凡渝
Original assignee: Jiangsu Xinjienuo Environmental Engineering Technology Co ltd
Current assignee: Jiangsu Xinjienuo Environmental Engineering Technology Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-03-30
Anticipated expiration: 2030-07-15

Abstract

The utility model relates to an airborne vibration isolator belongs to damping vibration isolation facility technical field. The center of the rectangular bottom plate boss of the vibration isolator is provided with a vertical hole; a damping ring is embedded in the vertical hole, a damping cover is pressed on the damping ring, the periphery of the damping cover is provided with a clamping groove embedded in the support frame, and two sides of the support frame extend downwards and are bent towards the two sides to form a joint plane; conical springs are respectively arranged in holes in the middle of the attaching planes on the two sides, and the spring pressing plates penetrate through the lower parts of the conical springs and are fixed on the attaching planes of the supporting frame; a vertical central shaft is inserted into a central through hole of the damping cover, and the lower end of the central shaft is fixedly connected with a damping ring positioned in the damping ring; the upper thread section of the central shaft penetrates through a central step hole of the connecting plate, and the nut presses the flexible pad positioned at the step of the central step hole; the upper part of the conical spring is lined with a spring cushion block, the lower end of a locking bolt is screwed in a threaded hole of the spring cushion block, and an upper spring seat is arranged on the locking bolt. The utility model discloses buffering damping performance is good, and can eliminate the stress of junction.

Description

Airborne vibration isolator

Technical Field

The utility model relates to a isolator, especially an airborne vibration isolator belongs to damping vibration isolation facility technical field.

Background

Applicants have searched for the following relatively close prior art:

the Chinese patent application with the application number of 201510039464.8 discloses a low-rigidity heavy-load low-frequency double-wire steel wire rope vibration isolator which comprises a negative-rigidity vibration reduction mechanism and a double-wire steel wire rope vibration reduction mechanism, wherein the negative-rigidity vibration reduction mechanism and the double-wire steel wire rope vibration reduction mechanism are connected in parallel. According to the introduction, the natural frequency of the vibration isolation system can be effectively reduced, and a good vibration reduction effect is achieved on low-frequency vibration.

The Chinese patent application with the application number of 201811204222x discloses a steel wire rope vibration isolator with a limiting structure, which comprises an upper clamping unit, a lower clamping unit, a connecting piece, a vibration isolating block, an aluminum plate and a fixing piece; the upper clamping unit and the lower clamping unit are consistent in structure and respectively comprise an upper clamping plate and a lower clamping plate; the steel wire rope is placed between the upper clamping plate and the lower clamping plate, and two ends of the steel wire rope in the diameter direction are respectively clamped in the upper clamping unit and the lower clamping unit; an upper clamping plate of the lower clamping unit is provided with a vibration isolation block, and an aluminum plate is embedded in the center of the interior of the vibration isolation block; the aluminum plate is connected with the shock insulation block through the fixing piece. The vibration isolator is simple in structure and convenient to process; the relative displacement in three directions can be effectively limited, and a certain limiting effect on torsion is achieved; the stability of the system can be effectively improved, and the safety of equipment and operators can be protected.

However, the applicant researches and tests show that the prior art has poor position degree, cannot keep level when the gravity center of the equipment is shifted, and is difficult to level; the damping can not be adjusted, and the defects of large three-dimensional rigidity deviation and the like exist.

Disclosure of Invention

The utility model discloses a first aim at: aiming at the defects in the prior art, the airborne vibration isolator which is good in vibration reduction and buffering effects, good in balance position degree and convenient to adjust is provided.

In order to achieve the above purpose, the utility model discloses the basic technical scheme of machine carries isolator does: the middle part of the base plate is provided with a boss, and the center of the boss is provided with a vertical hole with a rubber pad embedded at the bottom; an annular damping ring is embedded in the vertical hole, the damping ring presses a damping cover of which the edge of the bottom surface extends to the periphery of the top surface of the boss, the periphery of the damping cover is provided with a clamping groove embedded into an upper flanging of the supporting frame, and two sides of the supporting frame extend downwards to touch the upper surface of the bottom plate and then are respectively bent towards two sides to form a joint plane positioned on the upper surface of the bottom plate; conical springs with bottom surfaces attached to the bottom plate are respectively arranged in the middle holes of the attachment planes on the two sides, and the spring pressing plates penetrate through the lower parts of the conical springs and are fixed on the attachment planes of the supporting frame;

the center through hole of the damping cover is inserted with a vertical center shaft in movable fit with the center through hole, and the lower end of the center shaft is fixedly connected with a damping ring positioned in the damping ring; the upper threaded section of the central shaft penetrates through a central step hole of the connecting plate, and a fastening nut sinking into the central step hole is used for pressing a flexible pad positioned at a step of the central step hole;

the upper portion inside lining of conical spring has the spring cushion that the cross-section is the shape of falling T, passes the locking bolt lower extreme of connecting plate one side and screws in the screw hole of spring cushion soon, be equipped with the lock nut who is located the connecting plate below on the locking bolt and press the upper spring seat on the spring cushion.

When the vibration isolation device is used, the bottom plate is positioned above a vibration source, and the connecting plate supports and is connected to upper equipment needing vibration absorption or vibration isolation. The impact vibration is buffered and elastically limited due to the damping ring and the damping ring structure; meanwhile, the flexible pads at the central shaft and the upper connecting plate can coordinate, dislocate and deform, stress at the connecting part is eliminated, and shearing damage is avoided.

The utility model discloses further perfect is: the upper end and the lower end of the damping ring are respectively retracted inwards to form a concave structure in the middle and a convex structure in the upper part and the lower part of the central hole.

The utility model discloses further perfect is: and a radial damping gap is reserved between the excircle of the damping ring and the damping ring.

The utility model discloses further perfection is again: the two ends of the cross section of the damping ring are arc-shaped.

The utility model discloses further perfection is again: the upper spring seat is provided with a central threaded hole, and the periphery of the upper spring seat is provided with a lower flanging; the central threaded hole is screwed on the locking bolt, and the lower flanging clamps the upper periphery of the conical spring.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic perspective view of fig. 1.

Fig. 4 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 5 is a top view of fig. 4.

Fig. 6 is a schematic perspective view of fig. 5.

Detailed Description

Example one

The airborne vibration isolator of the embodiment is shown in figures 1 to 3 and comprises a rectangular bottom plate 10 with a boss 10-1 in the middle, wherein a vertical hole 10-2 with a rubber pad 8 embedded at the bottom is formed in the center of the boss 10-1, an annular damping ring 3 is embedded in the vertical hole 10-2, and the upper end and the lower end of the damping ring 3 are respectively retracted to form a middle concave structure and an upper convex structure and a lower convex structure of the central hole. The damping ring 3 presses a damping cover 12 with the edge of the bottom surface extending to the periphery of the top surface of the boss 10-1, the periphery of the damping cover 12 is provided with a clamping groove embedded with an upward flange 14-2 of a supporting frame 14, and two sides of the supporting frame 14 extend downwards to touch the upper surface of the bottom plate 10 and then bend towards two sides to form a joint plane 14-1 positioned on the upper surface of the bottom plate 10 respectively. Conical springs 7 with bottom surfaces attached to the bottom plate 10 are respectively arranged in holes in the middle parts of the attachment planes 14-1 on the two sides, and the spring pressing plates 9 penetrate through the lower parts of the conical springs 7 and are fixed on the attachment planes 14-1 of the supporting frames 14. Specifically, the spring pressing plate 9, the supporting frame 14 and the bottom plate 10 are fixedly connected through fastening screws at two ends of the spring pressing plate 9, and the rest four holes on the rectangular bottom plate 10 are used for being connected with a vibration source.

The center through hole of the damping cover 12 is inserted with a vertical central shaft 2 which is movably matched with the central shaft, the lower end of the central shaft 2 is fixedly connected with a damping ring 11 which is positioned in the damping ring 3, the two ends of the section of the damping ring 11 are arc-shaped, and a radial damping gap is reserved between the two ends of the damping ring 11 and the damping ring 3. The upper thread section of the central shaft 2 penetrates through a central step hole 1-1 of the rectangular connecting plate 1, and presses a flexible pad 15 positioned at the step of the central step hole 1-1 by a fastening nut 16 sunk into the central step hole 1-1.

The upper portion inside lining of conical spring 7 has spring cushion 6 that the cross-section is the shape of falling T, passes the countersunk head locking bolt 13 lower extreme of connecting plate one side and screws in the screw hole of spring cushion 6 soon, is equipped with lock nut 4 that is located under connecting plate 1 and presses upper spring seat 5 on spring cushion 6 on countersunk head locking bolt 13, specifically, upper spring seat 5 has central screw hole, and the periphery has turn-down edge, and central screw hole twists and twists at countersunk head locking bolt 13, and turn-down edge blocks conical spring 7's upper periphery.

When the vibration damping and isolating device is used, the bottom plate is arranged on a vibration source, and the connecting plate supports and is connected to equipment needing vibration damping or isolating. When the damping ring is impacted and vibrated, the vertical upper and lower displacements are buffered and elastically limited due to the contact of the damping ring and the upper and lower inward shrinkage structures of the damping ring, and the horizontal impact is limited due to the radial matching of the damping ring and the damping shaft; meanwhile, the flexible pads at the central shaft and the upper connecting plate can coordinate the dislocation deformation during horizontal movement, eliminate the stress at the connecting part and avoid shearing damage.

Example two

The airborne vibration isolator of the present embodiment is substantially the same as the embodiment in the basic structure as shown in fig. 4 to 6, except that the rectangular bottom plate 10 has two bosses 10-1 arranged side by side in the width direction at the middle part in the length direction, and thus has two vertical central shafts 2 arranged side by side, and the fastening nuts 16 at the upper ends of the two vertical central shafts 2 are covered under the elastic cover plate 17 fixed on the connecting plate 1, thereby preventing the upper ends of the vertical central shafts 2 from interfering with the vibration isolation device.

Two middle holes which are arranged side by side in the width direction are respectively arranged on two sides of the attaching plane 14-1 of the supporting frame 14, and conical springs 7 with bottom surfaces attached to the bottom plate 10 are arranged in the middle holes, so that four conical springs 7 are arranged in total, and the stability of shock absorption or vibration isolation is better.

Practice shows that the airborne vibration isolator of the embodiment has the following advantages:

1) the decoupling purpose of the vibration isolation system can be achieved by optimal arrangement measures such as rigidity adjustment, change of support positions and support quantity and the like according to different gravity center positions of the upper equipment;

2) the middle concave and upper and lower convex structures of the damping ring can be used for meeting the requirements of vibration damping and can also be used for meeting the requirement of impact resistance;

3) because the excircle of the damping ring is in a circular arc section and a radial damping gap is reserved, the matching relation can be designed as required, and the required friction damping force is generated;

4) the lower flanging at the periphery of the upper spring seat clamps the upper periphery of the conical spring, so that the balance position degree can be kept, namely, when the equipment generates a deflection trend due to the deviation of bearing capacity after loading, the support height of the spring can be adjusted by adjusting the upper spring seat, and the integral levelness of the equipment is kept;

5) the creep resistance is good, and the equilibrium position can be kept for a long time.

In addition to the above embodiments, the present invention may have other embodiments. For example, the elastic element can be changed according to the starting vibration frequency, the frequency range and the excitation type of the airborne equipment, and different forms such as a cylindrical spring, a conical spring, a rubber spring, an air spring and the like are adopted; the middle part of the vibration isolator can be provided with an oil cylinder to generate oil damping besides the friction damping of metal and rubber; and so on. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. An airborne vibration isolator, characterized in that: comprises a rectangular bottom plate (10) with a boss (10-1) in the middle, wherein the center of the boss is provided with a vertical hole (10-2) with a rubber pad (8) embedded at the bottom; an annular damping ring (3) is embedded in the vertical hole (10-2), the damping ring presses a damping cover (12) with the edge of the bottom surface extending to the periphery of the top surface of the boss, a clamping groove embedded in an upper flanging (14-2) of a support frame (14) is formed in the periphery of the damping cover, and two sides of the support frame extend downwards to touch the upper surface of the bottom plate and then are bent towards two sides to form a joint plane (14-1) on the upper surface of the bottom plate; conical springs (7) with bottom surfaces attached to the bottom plate are respectively arranged in the middle holes of the attachment planes on the two sides, and spring pressing plates (9) penetrate through the lower parts of the conical springs and are fixed on the attachment planes of the supporting frame;

a vertical central shaft (2) in movable fit with the damping cover is inserted into a central through hole of the damping cover, and the lower end of the central shaft is fixedly connected with a damping ring (11) positioned in the damping ring; the upper threaded section of the central shaft penetrates through a central step hole (1-1) of the connecting plate (1), and is pressed on a flexible pad (15) positioned at the step of the central step hole by means of a fastening nut (16) sunk into the central step hole;

the upper portion inside lining of conical spring has spring cushion (6) that the cross-section is the shape of falling T, and the screw hole of screwing in spring cushion (6) is twisted to the locking bolt (13) lower extreme that passes connecting plate one side, be equipped with on the locking bolt and be located the locking nut (4) under the connecting plate and press upper spring seat (5) on spring cushion.

2. The airborne isolator of claim 1 wherein: the upper end and the lower end of the damping ring are respectively retracted inwards to form a concave structure in the middle and a convex structure in the upper part and the lower part of the central hole.

3. The airborne isolator of claim 2 wherein: and a radial damping gap is reserved between the excircle of the damping ring and the damping ring.

4. The airborne isolator of claim 3 wherein: the two ends of the cross section of the damping ring are arc-shaped.

5. The airborne isolator of claim 4 wherein: the upper spring seat is provided with a central threaded hole, and the periphery of the upper spring seat is provided with a lower flanging; the central threaded hole is screwed on the locking bolt, and the lower flanging clamps the upper periphery of the conical spring.