阅读说明：本技术 新型减振及缓冲一体化装置 (Novel vibration reduction and buffering integrated device ) 是由 董小闵 李彪 王陶 席军 宋现宇 于 2019-10-21 设计创作，主要内容包括：本发明公开了一种新型减振及缓冲一体化装置,包括变截面的缸筒、设置于缸筒内的第一活塞、与第一活塞连接设置的第一活塞杆、与第一活塞连接设置的第二活塞杆、设置于第二活塞杆端部的第二活塞以及分别设置于缸筒端部的上端盖和下端盖；缸筒包括减振段和缓冲段,第一活塞与缸筒内壁之间设置间隙；第二活塞设置于缓冲段内且第二活塞可沿缸筒轴向方向运动,缓冲段内填充有铁磁颗粒小球,本技术方案的装置利用磁流变阻尼器的性能,可适应多种外界工况,具有良好的减振性能；在缓冲时利用颗粒阻尼器性能,输出力值稳定,且可通过调整线圈电流来改变磁场,调节第二活塞与颗粒的摩擦系数,可适应多种缓冲工况；且本发明结构紧凑,安装形式简单。(The invention discloses a novel vibration reduction and buffering integrated device which comprises a variable-section cylinder barrel, a first piston arranged in the cylinder barrel, a first piston rod arranged in connection with the first piston, a second piston arranged at the end part of the second piston rod, an upper end cover and a lower end cover which are respectively arranged at the end part of the cylinder barrel, wherein the first piston is arranged in the cylinder barrel; the cylinder barrel comprises a vibration reduction section and a buffer section, and a gap is formed between the first piston and the inner wall of the cylinder barrel; the second piston is arranged in the buffer section and can move along the axial direction of the cylinder barrel, and the buffer section is filled with the small ferromagnetic particle balls; the performance of the particle damper is utilized during buffering, the output force value is stable, the magnetic field can be changed by adjusting the current of the coil, and the friction coefficient between the second piston and the particles is adjusted, so that the buffer device can adapt to various buffering working conditions; the invention has compact structure and simple installation form.)

1. The utility model provides a novel damping and buffering integration device which characterized in that: the piston type hydraulic cylinder comprises a cylinder barrel with a variable cross section, a first piston arranged in the cylinder barrel, a first piston rod connected with the first piston, a second piston arranged at the end part of the second piston rod, and an upper end cover and a lower end cover which are respectively arranged at the end part of the cylinder barrel; the cylinder barrel comprises a vibration reduction section and a buffer section, the first piston rod and the second piston rod are coaxially arranged, the first piston is arranged in the vibration reduction section, and a gap is formed between the first piston and the inner wall of the cylinder barrel; the second piston is arranged in the buffer section and can move along the axial direction of the cylinder barrel, and the buffer section is filled with small ferromagnetic particle balls.

2. The novel integrated vibration damping and buffering device as claimed in claim 1, wherein: the first piston is provided with a vibration reduction excitation coil and a mounting groove for mounting the two piston rods, and magnetorheological fluid is filled in the vibration reduction section.

3. The novel integrated vibration damping and buffering device as claimed in claim 2, wherein: the first piston rod penetrates through the upper end cover and can drive the first piston to move along the axial direction, and a positioning ring and a guide ring matched with the positioning ring are arranged in the vibration reduction section and used for guiding the first piston rod.

4. The novel integrated vibration damping and buffering device as claimed in claim 3, wherein: a first oil seal is arranged between the upper end cover and the guide ring, and a nitrogen air bag is arranged between the positioning ring and the first piston.

5. The novel integrated vibration damping and buffering device as claimed in claim 1, wherein: the end part of the buffer section is fixedly provided with a pressing plate, one end of the second piston rod is fixedly connected with the first piston, and the other end of the second piston rod penetrates through the pressing plate and is fixedly connected with the second piston.

6. The novel integrated vibration damping and buffering device as claimed in claim 5, wherein: the second piston comprises a mounting section of a cylindrical structure and an impact section of a conical structure, and a buffering magnet exciting coil is arranged on the mounting section.

7. The novel integrated vibration damping and buffering device as claimed in claim 6, wherein: and a second oil seal is arranged at the bottom end of the vibration reduction section.

8. The novel integrated vibration damping and buffering device as claimed in claim 7, wherein: the first piston rod, the first piston, the second piston rod and the second piston are provided with wire holes which are communicated with each other and used for leading out the coil.

Technical Field

The invention relates to the field of mechanical vibration reduction, in particular to a novel vibration reduction and buffering integrated device.

Background

The existing devices capable of damping vibration and buffering mainly comprise a particle damper, a magnetorheological damper and the like. The particle damper has the advantages of simple structure, small size, low cost, no need of external energy input and the like, utilizes the friction among particles and the friction energy consumption between the piston head and the particles, has stable output force value and large output force in a buffer stroke, belongs to a passive energy absorber, and can only be suitable for a single working condition; the magneto-rheological damper is used as a semi-active energy absorber, can realize the change of output force only by inputting a small amount of external energy, has failure safety protection, can generate different output forces by adjusting input current under the action of a control algorithm, and can cope with external working conditions with complicated changes, but the output force of the magneto-rheological damper is greatly influenced by speed, has high requirement on the control algorithm under the buffer working condition and has poor controllability.

Therefore, a new type of vibration damping device is needed to overcome the above-mentioned drawbacks and meet the use requirements.

Disclosure of Invention

In view of the above, the patent discloses a vibration damping buffer device combining a particle damper and a double-extension rod type magnetorheological damper, which mainly utilizes the performance of the magnetorheological damper during vibration damping, can adapt to various external working conditions and has good vibration damping performance; the performance of the particle damper is utilized during buffering, the output force value is stable, the magnetic field can be changed by adjusting the current of the coil, and the friction coefficient between the piston and the particles is adjusted, so that the buffer device can adapt to various buffering working conditions; the invention has compact structure and simple installation form.

A novel vibration reduction and buffering integrated device comprises a variable-section cylinder barrel, a first piston arranged in the cylinder barrel, a first piston rod connected with the first piston, a second piston arranged at the end part of the second piston rod, an upper end cover and a lower end cover which are respectively arranged at the end part of the cylinder barrel; the cylinder barrel comprises a vibration reduction section and a buffer section, the first piston rod and the second piston rod are coaxially arranged, the first piston is arranged in the vibration reduction section, and a gap is formed between the first piston and the inner wall of the cylinder barrel; the second piston is arranged in the buffer section and can move along the axial direction of the cylinder barrel, and the buffer section is filled with small ferromagnetic particle balls.

Furthermore, be provided with damping excitation coil on the first piston, be provided with the mounting groove that is used for installing two piston rods on the first piston, the filling has magnetorheological suspensions in the damping section.

Furthermore, the first piston rod penetrates through the upper end cover and can drive the first piston to move along the axial direction, and a positioning ring and a guide ring matched with the positioning ring are arranged in the vibration reduction section and used for guiding the first piston rod.

Furthermore, a first oil seal is arranged between the upper end cover and the guide ring, and a nitrogen airbag is arranged between the positioning ring and the first piston.

Furthermore, the end part of the buffering section is fixedly provided with a pressing plate, one end of the second piston rod is fixedly connected with the first piston, and the other end of the second piston rod penetrates through the pressing plate and is fixedly connected with the second piston.

Further, the second piston comprises a mounting section of a cylindrical structure and an impact section of a conical structure, and a buffering magnet exciting coil is arranged on the mounting section.

Further, the bottom end of the vibration reduction section is provided with a second oil seal.

Further, the first piston rod, the first piston, the second piston rod and the second piston are provided with wire holes which are communicated with each other and used for leading out the coil.

The invention has the beneficial effects that:

1. the damping function of the device is mainly realized by the movement of the first piston in the cylinder barrel. In the vibration reduction process, the piston moves up and down with small displacement, so that the magnetorheological fluid flows between the inner wall of the cylinder barrel and the first piston, the current applied to the vibration reduction magnet exciting coil is changed according to the change of external working conditions, and semi-active control is realized. At this time, the second piston is not in contact with the ferromagnetic particle pellet, and the buffer portion does not function.

2. The buffering function of the device is mainly realized by the friction between the ferromagnetic particle ball and the second piston. In the buffering process, the second piston moves downwards with large displacement, impacts on the ferromagnetic particle ball, and rubs with the ball to consume energy to generate stable output force, and the friction coefficient of the second piston and the ball is changed by adjusting the current applied to the buffering magnet exciting coil according to the change of external working conditions, so that the stable output force is changed, and semi-active control is realized.

3. The second piston of the buffer part is designed as a conical head, the diameter of the second piston is larger, the diameter of the ferromagnetic particle ball is not larger than 6mm, the output force-displacement curve of the whole device is approximate to a rectangle in the buffer process, the output force value is stable, the peak value of the output force is reduced, and the mechanical property is excellent.

4. In the working process of the device, the volume of the magnetorheological fluid is changed due to the temperature rise, and the annular air bag filled with nitrogen is adopted for volume compensation.

5. The magneto-rheological damper is used as a novel shock absorber, takes a magneto-rheological liquid novel material as a medium, has the advantages of high reaction speed, large yield moment and the like, and is proved by experiments to have good control effect and low energy consumption.

6. In order to improve the response speed of the vibration reduction mechanism, the piston iron core of the magneto-rheological damper is made of materials such as ferrite and the like which need shorter excitation time, so that the response time of the mechanism is effectively improved, the control precision is improved, and the control complexity is reduced.

7. Because the damping part and the damping part have different clearances with the interior of the piston and the cylinder barrel, the cylinder barrel adopts a variable cross section design, the diameter of the cylinder barrel is small during damping, the diameter of the cylinder barrel is large during damping, and the volume of the large-diameter part cannot be filled with the small ferromagnetic particle balls.

8. The damping and buffering device has good effects under vibration damping and buffering working conditions, the advantages of the particle damper and the magnetorheological damper are well combined, the particle damper and the magnetorheological damper are separately controlled under the two working conditions, the coupling effect is avoided, and the damping and buffering device is suitable for various working conditions and is beneficial to control.

Drawings

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

FIG. 1 is a schematic structural diagram of the present invention.

Reference numerals

A first piston rod 1; an upper end cover 2; a first oil seal 3; a guide ring 4; a positioning ring 5; a nitrogen gas bag 6; a cylinder barrel 7; a seal ring 8; a first piston 9; 10 of magnetorheological fluid; a connecting bolt 11; a platen 12; a second piston rod 13; a second piston 14; ferromagnetic particle globules 15; a lower end cap 16.

Detailed Description

FIG. 1 is a schematic structural view of the present invention; as shown in the figure, the novel vibration damping and buffering integrated device comprises a cylinder 7 with a variable cross section, a first piston 9 arranged in the cylinder, a first piston rod 1 connected with the first piston 9, a second piston rod 13 connected with the first piston 9, a second piston 14 arranged at the end part of the second piston rod 13, and an upper end cover 2 and a lower end cover 16 which are respectively arranged at the end parts of the cylinder; the cylinder barrel 1 comprises a vibration reduction section and a buffer section, the first piston rod 1 and the second piston rod 13 are coaxially arranged, the first piston 9 is arranged in the vibration reduction section, and a gap is formed between the first piston 9 and the inner wall of the cylinder barrel; the second piston 14 is arranged in the buffer section, the second piston 14 can move along the axial direction of the cylinder barrel 7, and the buffer section is filled with ferromagnetic particle balls 15 (the vertical direction in the figure is the axial direction); the performance of the particle damper is utilized during buffering, the output force value is stable, the magnetic field can be changed by adjusting the current of the coil, and the friction coefficient between the piston and the particles is adjusted, so that the buffer device can adapt to various buffering working conditions; the invention has compact structure and simple installation form.

In this embodiment, be provided with damping excitation coil on the first piston 9, be provided with the mounting groove that is used for installing two piston rods on the first piston 9, the filling has magnetorheological suspensions 10 in the damping section, and first piston 9 is provided with two mounting grooves that communicate each other for install two piston rods, and of course the piston rod is provided with sealing washer 8 with the tip, prevents that magnetorheological suspensions 10 from getting into inside, and magnetorheological suspensions 10 can flow in its inside through the clearance between first piston 9 and the cylinder inner wall, carries out the regulation of electric current size after the circular telegram to damping excitation coil, realizes the function of damping.

In this embodiment, the first piston rod 1 penetrates through the upper end cover 2, the first piston rod 1 can drive the first piston 9 to move freely along the axial direction, and the vibration reduction section is internally provided with a positioning ring 5 and a guide ring 4 which is used for guiding the first piston rod 1 and is matched with the positioning ring 5; the cylinder inner wall is provided with a plurality of stair structures, and the convenience is in the installation of part, and 5 assembly of holding ring are in the inside step department of cylinder, and guide ring 4 and 5 coaxial arrangement of holding ring, guide ring one end cartridge are in the holding ring, and the other end is provided with the protruding edge structure that is used for installing first oil blanket 3, and overall structure is simple, and simple to operate does benefit to the assembly.

In this embodiment, be provided with first oil blanket 3 between upper end cover 2 and the guide ring 4, be provided with nitrogen gas gasbag 6 between holding ring 5 and the first piston 9, first oil blanket 3 one end is installed in the protruding edge department of holding ring 5, and the other end realizes compressing tightly through upper end cover 2, and in the device working process, the temperature rise leads to magnetorheological suspensions volume change, adopts the annular gasbag that is filled with nitrogen gas to carry out volume compensation.

In this embodiment, the bottom of damping section is provided with the second oil blanket, the fixed clamp plate 12 that is provided with of buffering section end, 13 one end of second piston rod and first piston 9 fixed connection, the second piston rod 13 other end pass clamp plate 12 and with second piston 14 fixed connection, the lower extreme of damping section also is provided with guide ring and holding ring, the same mounting structure is adopted with damping section upper end to its mounting means, do not do too much repeated description here, clamp plate 12 and cylinder fixed connection seal through the second oil blanket for the damping section forms an inclosed cavity.

In this embodiment, the second piston 14 includes the installation section of cylindrical structure and the impact section of conical structure, be provided with buffering excitation coil on the installation section, be provided with the mounting groove that is used for installing second piston rod 13 on the installation section, buffering excitation coil twines on the installation section of cylindrical structure, and be provided with the mounting hole with the mounting groove intercommunication on the second piston, of course, wire installation back mounting hole department takes sealing device to seal, in the buffering process, second piston 14 moves down with big displacement, strike on ferromagnetic granule bobble 15, consume energy with bobble friction, produce the steady output power, and can change according to external operating mode, through adjusting the electric current size of applying to buffering excitation coil, make the friction coefficient of second piston 14 and bobble change, change the magnitude of steady output power, realize semi-active control, second piston 14 is the design of conical head and the great diameter is great, and can be according to external operating mode change, change, The diameter of the small ferromagnetic particle ball is not more than 6mm, so that the output force-displacement curve of the whole device is approximately rectangular in the buffer process, the output force value is stable, the peak value of the output force is reduced, the mechanical property is excellent, the iron ball can smoothly move along the outer contour of the conical head in the impact process by adopting the design mode of the conical head, and the buffer effect is further improved.

In this embodiment, the first piston rod 1, the first piston 9, the second piston rod 13, and the second piston 14 are provided with wire holes that are communicated with each other and used for leading out coils (damping excitation coils and buffering excitation coils), as shown in the figure, the wires can be smoothly led out through the wire holes that are communicated with each other, and the trouble that the wire holes need to be opened additionally is avoided.

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.