CN201802809U

CN201802809U - Anti-torque vibration isolation and damping device for viscoelastic damping

Info

Publication number: CN201802809U
Application number: CN201020523911XU
Authority: CN
Inventors: 徐赵东; 朱俊涛; 郭一峰
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2010-09-09
Filing date: 2010-09-09
Publication date: 2011-04-20
Anticipated expiration: 2020-09-09

Abstract

The utility model discloses an anti-torque vibration isolation and damping device for viscoelastic damping, which comprises an inner barrel, a bearing, a bottom connecting plate and an outer barrel. The bearing is connected with the inner barrel, the bottom connecting plate is connected with the bearing, the outer barrel is connected with the bottom connecting plate, a torsional rigidity reducing layer is arranged between the inner barrel and the outer barrel, the inner barrel is welded with an inner ring of the bearing, an outer ring of the bearing is welded with an inner ring of the bottom connecting plate, and an outer ring of the bottom connecting plate is welded with the outer barrel. The anti-torque vibration isolation and damping device has lower torque rigidity and fine energy utilization ability, can effectively isolate high and medium frequency pumping and further can effectively reduce pumping amplitude of low frequency about 1Hz.

Description

Viscoelastic damping is antitorque every vibration damping equipment

Technical field

The utility model relate to a kind of be used for field precision type instrument platforms such as machinery, Aeronautics and Astronautics, military project and building antitorque every vibration damping equipment, viscoelastic damping specifically is antitorque every vibration damping equipment.

Background technique

Vibration is a common phenomena in the engineering, and its harm mainly refers to the influence of vibration to equipment and carrier generation thereof, and excessive vibration reaction may cause influences such as instrument and equipment can not normally use, carrier structure destruction.Therefore must take measures to these vibrations, the amplitude of its vibration is controlled in the permissible range, eliminating harm, vibration isolation is one of effective means wherein.Passive vibration isolation has the outside resources of not needing, apparatus structure is fairly simple, be easy to realize, advantage such as Economy and good reliability more particularly has the environment (as: not allowing the environment of magnetic field, electric field and the environment of energy supply anxiety) of specific (special) requirements, needs to adopt the passive vibration isolation measure.Owing to above characteristics and reason, the passive vibration isolation technology is used widely.

Because the system design of the little vibration vibration-isolating platform of precision type instrument generally need be considered the little vibration interference of various complex environments, it considers that frequency range is little vibration of 0～100Hz.General rubber passive vibration isolation device can only be isolated the frequency of certain limit, and only medium-high frequency is had good vibration isolating effect; In addition, general rubber passive vibration isolation device does not also have damping capacity.What therefore, model utility can wideband work has certain effectiveness in vibration suppression simultaneously has very big using value every vibration damping equipment.

The model utility content

The model utility purpose: at above-mentioned prior art problems and deficiency, the purpose of this utility model provide a kind ofly have less torsional stiffness, good energy dissipation capacity, can effectively isolate the medium-high frequency excitation and also can effectively reduce the viscoelastic damping of its excitation amplitude the low frequency about 1Hz antitorque every vibration damping equipment.

Technological scheme: for achieving the above object, the technical solution of the utility model is that a kind of viscoelastic damping is antitorque every vibration damping equipment, the bearing that comprises inner core, joins with inner core, the end connecting plate that joins with bearing and the urceolus that joins with end connecting plate, wherein be provided with torsional stiffness between inner core and the urceolus and reduce layer, the interior ring of inner core and bearing adopts and is welded to connect, and the interior ring employing of the outer shroud of bearing and end connecting plate is welded to connect, the outer shroud and the urceolus employing of end connecting plate are welded to connect.

It is sheet high damping low modulus viscoelastic material layer that described torsional stiffness reduces layer.

Described torsional stiffness reduces layer and adopts vulcanization to be filled between inner core and the urceolus.

Described bearing is arranged at interior tube bottom.

Beneficial effect: the utlity model has less torsional stiffness, and have good energy dissipation capacity.Find through test: the utility model can effectively be isolated the medium-high frequency excitation, and also can effectively reduce its excitation amplitude to the low frequency about 1Hz.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model A-A sectional drawing.

Embodiment

Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiments only be used to the utility model is described and be not used in the restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present utility model.

As depicted in figs. 1 and 2, a kind of viscoelastic damping is antitorque every vibration damping equipment, comprise inner core 1, be provided with bearing 4 in the bottom of inner core 1, be provided with end connecting plate 5 in the outside of bearing 4, the outer urceolus 2 that is equipped with at end connecting plate 5, between inner core 1 and urceolus 2, be provided with the torsional stiffness of filling sheet high damping low modulus viscoelastic material and reduce layer 3 by vulcanization, and between the outer shroud of the interior ring of the outer shroud of the interior ring of inner core 1 and bearing 4, bearing 4 and end connecting plate 5, end connecting plate 5 and the urceolus 2 all the employing mode of welding be connected.

Fill sheet high damping low modulus viscoelastic material between the inside and outside tube of this device, it is directly vulcanized on inner core and urceolus, the antitorque torsional stiffness every vibration damping equipment of viscoelastic damping is reduced, its effective operating frequency range is increased; And has good energy dissipation capacity; Inner core and bearing inner ring welding should be fastenedly connected; End connecting plate links together urceolus, bearing.

Viscoelastic damping is antitorque when vibration damping equipment is connected with the external world, and its inner core is connected with the external world respectively with urceolus.When being connected with the external world, inner core can institute's welding steel and the extraneous bolt that adopts be connected at its welded top steel plate; Also can make inner core directly and the external world be welded to connect.Urceolus and the extraneous same inner core of connecting means.The vertical load of the system that is connected with inner core passes to bearing by inner core like this, and bearing passes to following bearing by end connecting plate again.But the vertical displacement of inner core is restrained, promptly can not produce vertical displacement.And provide by the high damping low modulus viscoelastic material of sulfuration between inside and outside tube along the constraint of tube hoop direction.When system is subjected to reversing excitation, owing to being attached thereto, inner core connects, so the excitation that system will be subjected to passes to inner core; Owing to be filled with sheet high damping low modulus viscoelastic material between inner core and the urceolus, make inner core obtain effective isolation and weaken to the excitation of urceolus transmission.

Claims

1. a viscoelastic damping is antitorque every vibration damping equipment, the bearing (4) that comprises inner core (1), joins with inner core (1), the end connecting plate (5) that joins with bearing (4) and the urceolus (2) that joins with end connecting plate (5), it is characterized in that: be provided with torsional stiffness between described inner core (1) and the urceolus (2) and reduce layer (3), inner core (1) is welded to connect with the interior ring employing of bearing (4), and the interior ring employing of the outer shroud of bearing (4) and end connecting plate (5) is welded to connect, the outer shroud and urceolus (2) employing of end connecting plate (5) are welded to connect.

2. antitorque every vibration damping equipment according to the described viscoelastic damping of claim 1, it is characterized in that: described torsional stiffness reduces layer (3) and is sheet high damping low modulus viscoelastic material layer.

3. antitorque every vibration damping equipment according to claim 1 or 2 described viscoelastic dampings, it is characterized in that: described torsional stiffness reduces layer (3) and adopts vulcanization to be filled between inner core (1) and the urceolus (2).

4. antitorque every vibration damping equipment according to the described viscoelastic damping of claim 1, it is characterized in that: described bearing (4) is arranged at inner core (1) bottom.