阅读说明：本技术 轨道用减振支座 (Vibration damping support for track ) 是由 郝笑甜 王海龙 于 2020-07-06 设计创作，主要内容包括：本发明公开了一种轨道用减振支座,包括基座、轨道支座、支撑于所述基座与轨道支座之间的减振弹簧以及设置于所述基座内用于对轨道支座的振动施加阻尼作用的阻尼器；所述阻尼器包括外缸筒、同轴设置于所述外缸筒内的内缸筒、与所述内缸筒滑动配合的活塞体以及连接于所述活塞体与轨道支座之间的活塞杆；所述活塞体包括下部开口且由导磁材料制作的筒状外壳、同轴一体成型于筒状外壳内的中心柱,缠绕于所述中心柱的励磁线圈以及用于封闭筒状壳体底部的底盖；油液需通过横向过油孔流经活塞体；所述横向过油孔的内壁固定设有磁致伸缩材料制作的节流体；本发明的减振支座中的阻尼器的阻尼强度可根据需要进行主动调节,进而满足轨道的减振需要。(The invention discloses a vibration reduction support for a track, which comprises a base, a track support, a vibration reduction spring supported between the base and the track support and a damper arranged in the base and used for applying a damping effect on the vibration of the track support; the damper comprises an outer cylinder barrel, an inner cylinder barrel coaxially arranged in the outer cylinder barrel, a piston body in sliding fit with the inner cylinder barrel and a piston rod connected between the piston body and a track support; the piston body comprises a cylindrical shell with an opening at the lower part and made of a magnetic conductive material, a central column coaxially and integrally formed in the cylindrical shell, an excitation coil wound on the central column and a bottom cover used for closing the bottom of the cylindrical shell; oil liquid needs to flow through the piston body through the transverse oil passing hole; a throttle body made of magnetostrictive material is fixedly arranged on the inner wall of the transverse oil passing hole; the damping intensity of the damper in the vibration damping support can be actively adjusted according to the requirement, so that the vibration damping requirement of the track is met.)

1. A damping support for track which characterized in that: the damping device comprises a base, a track support, a damping spring supported between the base and the track support and a damper arranged in the base and used for damping the vibration of the track support;

the damper comprises an outer cylinder barrel, an inner cylinder barrel coaxially arranged in the outer cylinder barrel, a piston body in sliding fit with the inner cylinder barrel and a piston rod connected between the piston body and a track support; the piston body divides the inner cavity of the inner cylinder barrel into an upper oil cavity and a lower oil cavity;

the piston body comprises a cylindrical shell with an opening at the lower part and made of a magnetic conductive material, a central column coaxially and integrally formed in the cylindrical shell, an excitation coil wound on the central column and a bottom cover used for closing the bottom of the cylindrical shell; the central column is provided with two longitudinal oil passing holes arranged along the axial direction and a plurality of transverse oil passing holes communicated between the two longitudinal oil passing holes; the end part of the longitudinal oil passing hole is provided with a plug so that oil liquid needs to flow through the piston body through the transverse oil passing hole; and a throttling body made of magnetostrictive material is fixedly arranged on the inner wall of the transverse oil passing hole.

2. The vibration-damping mount for a rail according to claim 1, wherein: the throttle body is fixedly arranged in a mounting seat made of rigid materials, and the mounting seat is embedded in the inner wall of the transverse oil passing hole.

3. The vibration-damping mount for a rail according to claim 2, wherein: the base comprises a base body and an installation cylinder fixedly arranged in the base body; the inside of the mounting cylinder is divided into an upper cylinder and a lower cylinder by a partition plate in the middle; the damper is fixedly arranged in the lower cylinder; a guide pillar is fixed at the bottom of the track support; the guide post penetrates through the partition plate and is connected with a piston rod of the damper.

4. The vibration-damping mount for a rail according to claim 3, wherein: a plurality of guide post belleville springs are sleeved outside the upper barrel of the mounting barrel in a stacking mode.

5. The vibration-damping mount for a rail according to claim 4, wherein: and a sound insulation material is filled between the mounting cylinder and the base.

Technical Field

The invention relates to the field of vibration reduction equipment, in particular to a vibration reduction support for a track.

Background

In recent years, urban rail transit in China is rapidly developed, and the problem of environmental vibration generated by subway operation is becoming more serious. At present, the vibration reduction measures adopted aiming at the track structure mainly comprise a vibration reduction fastener, a vibration reduction sleeper and a vibration reduction track bed. Wherein, the steel spring floating slab track is the track structure with the best damping effect at present. However, in the prior art, the damping strength of the damper with the built-in steel spring cannot be adjusted according to actual needs, if the damping action of the damper is small, the floating plate vibrates near the fundamental frequency of 10Hz to generate an obvious amplification phenomenon, and meanwhile, the damping effect in the frequency range (4-10 Hz) with the greatest harm to human bodies is not as good as possible. The main frequency of the track vibration of the floating plate is located at the fundamental frequency of the floating plate, and if the vibration of the fundamental frequency can be reduced by increasing the damping ratio of the vibration isolation system, the vibration reduction effect of high frequency will be affected accordingly.

Disclosure of Invention

In view of this, the present invention provides a vibration damping mount for a rail, where the damping strength of a damper in the vibration damping mount can be actively adjusted according to needs, so as to meet the vibration damping needs of the rail.

Damping support for track, its characterized in that: the damping device comprises a base, a track support, a damping spring supported between the base and the track support and a damper arranged in the base and used for damping the vibration of the track support;

the damper comprises an outer cylinder barrel, an inner cylinder barrel coaxially arranged in the outer cylinder barrel, a piston body in sliding fit with the inner cylinder barrel and a piston rod connected between the piston body and a track support; the piston body divides the inner cavity of the inner cylinder barrel into an upper oil cavity and a lower oil cavity;

the piston body comprises a cylindrical shell with an opening at the lower part and made of a magnetic conductive material, a central column coaxially and integrally formed in the cylindrical shell, an excitation coil wound on the central column and a bottom cover used for closing the bottom of the cylindrical shell; the central column is provided with two longitudinal oil passing holes arranged along the axial direction and a plurality of transverse oil passing holes communicated between the two longitudinal oil passing holes; the end part of the longitudinal oil passing hole is provided with a plug so that oil liquid needs to flow through the piston body through the transverse oil passing hole; and a throttling body made of magnetostrictive material is fixedly arranged on the inner wall of the transverse oil passing hole.

Further, the throttle body is fixedly arranged in a mounting seat made of rigid materials, and the mounting seat is embedded in the inner wall of the transverse oil passing hole.

Further, the base comprises a base body and an installation cylinder fixedly arranged in the base body; the inside of the mounting cylinder is divided into an upper cylinder and a lower cylinder by a partition plate in the middle; the damper is fixedly arranged in the lower cylinder; a guide pillar is fixed at the bottom of the track support; the guide post penetrates through the partition plate and is connected with a piston rod of the damper.

Furthermore, a plurality of guide post belleville springs are sleeved outside the upper barrel of the mounting barrel in a stacking mode.

Further, a sound insulation material is filled between the mounting cylinder and the base.

The invention has the beneficial effects that: according to the vibration reduction support for the track, when the track support moves in a vehicle, the track support is forced to vibrate up and down, and the piston rod and the piston body are driven to slide up and down along the cylinder barrel; when the piston body moves downwards, part of oil in the lower oil cavity flows to the upper oil cavity through the oil through hole in the piston body, and meanwhile, the other part of oil flows into the oil storage cavity through the oil return opening; when the piston body moves upwards, oil in the upper oil cavity flows to the lower oil cavity through the oil through hole in the piston body, and meanwhile, oil in the oil storage cavity flows into the lower oil cavity through the oil return port; the oil liquid forms damping force when flowing through the oil hole, so that the vibration of the rail support can be quickly attenuated; the strength of the damping strength depends on the size of the flow cross section of the oil passing hole; when the excitation coil is electrified, a magnetic field is formed in the piston body, and the whole piston body is made of a magnetic conductive material, so that the magnetic leakage phenomenon can be effectively weakened; because the direction of the magnetic field in the range of the central column is along the axial direction of the piston, the throttling body made of magnetostrictive materials extends along the axial direction, so that the minimum flow cross section of the transverse oil passing hole is reduced, the resistance of oil flowing through is improved, and the damping strength of the damper is improved; of course, the magnetic field intensity can be adjusted by controlling the current intensity of the excitation coil, and then the damping intensity of the damper is adjusted; the invention skillfully takes the piston as the iron core of the electromagnet, greatly improves the action of the magnetic field borne by the magnetostrictive material and can effectively improve the stretching amount of the magnetostrictive material.

Drawings

The invention is further described below with reference to the figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the damper of the present invention;

FIG. 3 is a schematic view of a piston body according to the present invention;

fig. 4 is a schematic diagram of the distribution of magnetic lines in the piston body according to the present invention.

Detailed Description

Fig. 1 is a schematic structural view of the present invention, as shown in the figure: the vibration damping support for the track comprises a base 2, a track support 6, a vibration damping spring 5 supported between the base 2 and the track support 6, and a damper 1 arranged in the base 2 and used for damping vibration of the track support 6;

as shown in the figure, the base 2 comprises a base body with height equal to that of the foundation and a mounting cylinder 4 fixedly arranged in the base body; the damping spring 5 is supported between the upper end of the seat body and the bottom of the track support 6; the inside of the mounting cylinder 4 is divided into an upper cylinder and a lower cylinder by a partition plate in the middle; the damper 1 is fixedly arranged in the lower cylinder; the rail support 6 is integrally formed with a guide pillar which is vertically arranged; the guide post passes through the partition plate and is connected with a piston rod 13 of the damper 1.

As shown in fig. 2, the damper 1 includes an outer cylinder 15, an inner cylinder 14 coaxially disposed in the outer cylinder 15, a piston body 12 slidably engaged with the inner cylinder 14, and a piston rod 13 connected between the piston body 12 and a rail support 6; the piston body 12 divides the inner cavity of the inner cylinder 14 into an upper oil cavity and a lower oil cavity; an oil storage cavity is formed between the outer wall of the inner cylinder barrel 14 and the inner wall of the outer cylinder barrel 15; the upper ends of the inner cylinder barrel 14 and the outer cylinder barrel 15 are sealed through an upper sealing plug, and the piston rod 13 is in sliding sealing fit with the upper sealing plug; the lower end of the inner cylinder 14 is sealed by a lower sealing plug; the lower sealing plug is provided with an oil return hole; the piston body 12 is provided with an oil passing hole; when a train passes by, the rail support 6 is forced to vibrate up and down, and the piston rod 13 and the piston body 12 are driven to slide up and down along the cylinder barrel; when the piston body 12 descends, part of oil in the lower oil cavity flows to the upper oil cavity through the oil through hole in the piston body 12, and meanwhile, the other part of oil flows into the oil storage cavity through the oil return port 11; when the piston body 12 moves upwards, oil in the upper oil cavity flows to the lower oil cavity through the oil through hole in the piston body 12, and meanwhile, oil in the oil storage cavity flows into the lower oil cavity through the oil return port 11; the oil liquid forms damping force when flowing through the oil hole, so that the vibration of the track support 6 can be quickly attenuated; the strength of the damping strength depends on the size of the flow cross section of the oil passing hole.

As shown in fig. 3, the piston body 12 includes a cylindrical outer shell 126 with an opening at the lower part and made of a magnetic conductive material, a central column coaxially and integrally formed in the cylindrical outer shell 126, an excitation coil 127 wound around the central column, and a bottom cover for closing the bottom of the cylindrical shell; the bottom cover can be fixed at the bottom of the cylindrical shell 126 by welding and the like, and the central column is provided with two longitudinal oil passing holes 125 arranged along the axial direction and a plurality of transverse oil passing holes 121 communicated between the two longitudinal oil passing holes 125; the end of the longitudinal oil passing hole 125 is provided with a plug so that oil needs to flow through the piston body 12 through the transverse oil passing hole 121; as shown in fig. 3, a plug is arranged at the upper end of the left longitudinal oil passing hole 125, and a plug is arranged at the lower end of the right longitudinal oil passing hole 125; therefore, oil can only flow through the piston body 12 through the path of the longitudinal oil passing hole 125, the transverse oil passing hole 121 and the longitudinal oil passing hole 125; and a throttle body 123 made of magnetostrictive material is fixedly arranged on the inner wall of the transverse oil passing hole 121.

As shown in fig. 4, when the exciting coil 127 is energized, a magnetic field is formed in the piston body 12, and since the entire piston body 12 is made of a magnetic conductive material, the magnetic leakage phenomenon can be effectively reduced; because the direction of the magnetic field in the range of the central column is along the axial direction of the piston, the throttle body 123 made of magnetostrictive material extends along the axial direction, so that the minimum flow cross section of the transverse oil passing hole 121 is reduced, the resistance of oil flowing is improved, and the damping strength of the damper 1 is improved; of course, the magnetic field intensity can be adjusted by controlling the current intensity of the exciting coil 127, and then the damping intensity of the damper 1 is adjusted; the piston is ingeniously used as the iron core of the electromagnet, the magnetic field effect on the magnetostrictive material is greatly improved, and the stretching amount of the magnetostrictive material can be effectively improved.

In this embodiment, 3 pairs of outer sleeves of the guide post disc springs 7 are stacked in the upper barrel of the mounting barrel 4, each pair of disc springs are oppositely arranged, the elastic force of the disc springs is nonlinear, and when the rail support 6 descends to form an overlarge rail support, the disc springs generate a great elastic supporting force to support the rail supports, so that the damper 1 is prevented from being damaged.

In this embodiment, it has acoustic material 3 to fill between installation section of thick bamboo 4 and the base 2, and attenuator 1 is in the course of the work, and fluid passes through the oilhole with the high-frequency current, and then produces the hydraulic noise, and acoustic material 3 can effectively obstruct the noise of attenuator 1 during operation.

In this embodiment, the throttle body 123 is fixedly mounted in a mounting seat 122 made of a rigid material (such as ceramic), and the mounting seat 122 is embedded in the inner wall of the transverse oil passing hole 121; the rigid mounting seat 122 restricts the expansion and contraction of the throttle body 123 in the lateral direction, and since the magnetic field within the throttle body 123 does not substantially completely extend in the axial direction of the piston body 12, the rigid mounting seat 122 restrains the throttle body 123 from extending in the axial direction of the piston body 12 even when the direction of the extension tendency of the throttle body 123 deviates.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.