阅读说明：本技术 长流道阻尼力分级可调磁流变阻尼器 (Long-runner damping force graded adjustable magnetorheological damper ) 是由 田应飞 浮洁 梁惠君 李伟 余淼 卢胜 李剑 于 2021-09-28 设计创作，主要内容包括：本发明涉及阻尼减振器技术领域,具体涉及一种长流道阻尼力分级可调磁流变阻尼器,内缸筒、中缸筒和外缸筒从内至外依次套设,内缸筒的内部填充有磁流变液,内缸筒的底部具有通孔,并与中缸筒相通,活塞安置于内缸筒的内部,活塞杆的一端插入至内缸筒并与活塞固定连接,浮动活塞嵌套在内缸筒与外缸筒之间,且置于中缸筒内,外缸筒内置多级励磁线圈。通过上述结构设置,可以实现磁流变阻尼器阻尼力分级调控,提高其稳定性与工作效率,延长其使用寿命,扩大其使用范围与使用率。此外,该阻尼器结构简单、成本较低、使用范围广泛,减振性能出众。(The invention relates to the technical field of damping shock absorbers, in particular to a long-runner damping force graded adjustable magnetorheological damper. Through the structural arrangement, the damping force of the magneto-rheological damper can be regulated and controlled in a grading manner, the stability and the working efficiency of the magneto-rheological damper are improved, the service life of the magneto-rheological damper is prolonged, and the application range and the utilization rate of the magneto-rheological damper are enlarged. In addition, the damper has the advantages of simple structure, low cost, wide application range and outstanding vibration damping performance.)

1. The utility model provides a hierarchical adjustable magnetorheological damper of long runner damping force which characterized in that:

the magnetorheological fluid damper comprises an inner cylinder barrel, a middle cylinder barrel, an outer cylinder barrel, a piston rod, a piston, a floating piston and multistage magnet exciting coils, wherein the inner cylinder barrel, the middle cylinder barrel and the outer cylinder barrel are sequentially sleeved from inside to outside, magnetorheological fluid is filled in the inner cylinder barrel, a through hole is formed in the bottom of the inner cylinder barrel and communicated with the middle cylinder barrel, the piston is arranged in the inner cylinder barrel, one end of the piston rod is inserted into the inner cylinder barrel and fixedly connected with the piston, the floating piston is nested between the inner cylinder barrel and the outer cylinder barrel and arranged in the middle cylinder barrel, the floating piston divides the inner space of the middle cylinder barrel into an inner upper space and an inner lower space, the inner upper space is filled with inert gas, and the multistage magnet exciting coils are arranged in the outer cylinder barrel.

2. The long flow channel damping force graded adjustable magnetorheological damper of claim 1, wherein:

the magnetorheological damper with the adjustable long flow channel damping force in a grading mode further comprises an upper lifting ring, wherein the upper lifting ring is fixedly connected with the piston rod and is located at one end, far away from the piston, of the piston rod.

3. The long flow channel damping force graded adjustable magnetorheological damper of claim 2, wherein:

the magnetorheological damper with the adjustable long runner damping force in a grading mode further comprises a lower lifting ring, and the lower lifting ring is fixedly connected with the bottom of the outer cylinder barrel.

4. The long flow channel damping force graded adjustable magnetorheological damper of claim 3, wherein:

the long-flow-passage damping-force-graded adjustable magnetorheological damper further comprises an air inlet, and the air inlet is fixedly arranged on the outer wall of the middle cylinder barrel and communicated with the middle cylinder barrel.

5. The long flow channel damping force graded adjustable magnetorheological damper as in claim 4, wherein:

the magnetorheological damper with the adjustable graded long-runner damping force further comprises a bolt, and the bottoms of the inner cylinder barrel, the middle cylinder barrel and the outer cylinder barrel are connected through the bolt.

Technical Field

The invention relates to the technical field of damping shock absorbers, in particular to a magnetorheological damper with a long flow passage and a step-adjustable damping force.

Background

The non-road vehicle has a severe working environment, severe vibration is easily generated, the passive damper cannot meet the actual requirement, and under the background, the intelligent damper is applied. The magnetorheological fluid is distinguished in the field of intelligent vibration reduction by the specific rheological effect, and is widely concerned and researched. At present, a coil of a common magnetorheological damper is usually arranged in a piston head, and the size of the piston head is limited by the stroke of the damper, so that on one hand, the structure limits the length of a damping flow channel, the damper cannot realize the hierarchical regulation and control of a damping force value and cannot provide a wide damping force value, and the application range of the damper is greatly influenced; on the other hand, the damping flow channel moves along with the movement of the piston head, so that the risk of flow channel deformation is increased, the stable output of the damping force is further influenced, and the failure of the damper can be caused in severe cases. According to research, at present, no solution to the problems exists, so that the magnetorheological damper with the long flow passage and the high reliability and the adjustable grading of the damping force has great research significance.

Disclosure of Invention

In order to solve the problems mentioned in the background art, the invention provides a magnetorheological damper with a long flow passage and a step-adjustable damping force.

The invention provides a long-runner damping force graded adjustable magnetorheological damper, which comprises an inner cylinder barrel, a middle cylinder barrel, an outer cylinder barrel, a piston rod, a piston, a floating piston and a multi-level excitation coil, the inner cylinder barrel, the middle cylinder barrel and the outer cylinder barrel are sequentially sleeved from inside to outside, magnetorheological fluid is filled in the inner cylinder barrel, a through hole is formed in the bottom of the inner cylinder barrel, and is communicated with the middle cylinder, the piston is arranged inside the inner cylinder, one end of the piston rod is inserted into the inner cylinder and is fixedly connected with the piston, the floating piston is nested between the inner cylinder and the outer cylinder, and the floating piston divides the inner space of the middle cylinder into an inner upper space and an inner lower space, the inner upper space is filled with inert gas, and the outer cylinder is internally provided with the multi-stage excitation coil.

The magnetorheological damper with the graded and adjustable damping force of the long flow channel further comprises an upper lifting ring, and the upper lifting ring is fixedly connected with the piston rod and is positioned at one end, far away from the piston, of the piston rod.

The magnetorheological damper with the graded and adjustable damping force of the long runner further comprises a lower lifting ring, and the lower lifting ring is fixedly connected with the bottom of the outer cylinder barrel.

The magnetorheological damper with the graded and adjustable damping force of the long flow channel further comprises an air inlet, and the air inlet is fixedly installed on the outer wall of the middle cylinder barrel and communicated with the middle cylinder barrel.

The magnetorheological damper with the graded and adjustable damping force of the long flow channel further comprises a bolt, and the bottoms of the inner cylinder barrel, the middle cylinder barrel and the outer cylinder barrel are connected through the bolt.

The long-runner damping-force-graded adjustable magnetorheological damper is of a three-cylinder type, under the same external dimension of the damper, the exciting coils are arranged outside in a grading manner, a damping runner is greatly increased, the graded adjustment and control of a damping force value can be realized, a wide damping force value is provided, and the application range of the damper is widened. The damping flow channel is arranged in the middle cylinder barrel, so that the flow channel is changed from a motion state to a static state, the risk of flow channel deformation is reduced, and the stability of the damper is improved.

Drawings

FIG. 1 is a schematic structural diagram of a long-runner damping-force-staged adjustable magnetorheological damper of the invention.

1-hanging a ring; 2-a piston rod; 3-an inner cylinder barrel; 4-middle cylinder barrel; 5-a piston; 6-a floating piston; 7-an outer cylinder barrel; 8-multi-stage field coil; 9-lower lifting ring; 10-bolt; 11-magnetorheological fluid; 12-an inert gas; 13-air inlet.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

In the present embodiment, the terms "upper", "lower", "left", "right", "front", "rear", "upper end", "lower end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention.

Referring to fig. 1, the invention provides a long-flow-passage damping-force-graded adjustable magnetorheological damper, which comprises an inner cylinder 3, a middle cylinder 4, an outer cylinder 7, a piston rod 2, a piston 5, a floating piston 6 and a multi-level excitation coil 8, wherein the inner cylinder 3, the middle cylinder 4 and the outer cylinder 7 are sequentially sleeved from inside to outside, magnetorheological fluid 11 is filled in the inner cylinder 3, a through hole is formed in the bottom of the inner cylinder 3 and is communicated with the middle cylinder 4, the piston 5 is arranged in the inner cylinder 3, one end of the piston rod 2 is inserted into the inner cylinder 3 and is fixedly connected with the piston 5, the floating piston 6 is nested between the inner cylinder 3 and the outer cylinder 7 and is arranged in the middle cylinder 4, the floating piston 6 divides the inner space of the middle cylinder 4 into an inner upper space and an inner lower space, the inner upper space is filled with inert gas 12, and the multistage excitation coil 8 is arranged in the outer cylinder 7.

The magnetorheological damper with the adjustable long flow channel damping force in a grading mode further comprises an upper lifting ring 1, wherein the upper lifting ring 1 is fixedly connected with the piston rod 2 and is located at one end, far away from the piston 5, of the piston rod 2.

The magnetorheological damper with the adjustable long runner damping force in a grading mode further comprises a lower lifting ring 9, and the lower lifting ring 9 is fixedly connected with the bottom of the outer cylinder barrel 7.

The long-flow-passage damping-force-graded adjustable magnetorheological damper further comprises an air inlet 13, and the air inlet 13 is fixedly installed on the outer wall of the middle cylinder barrel 4 and communicated with the middle cylinder barrel 4.

The magnetorheological damper with the graded and adjustable damping force of the long flow passage further comprises a bolt 10, and the bottoms of the inner cylinder barrel 3, the middle cylinder barrel 4 and the outer cylinder barrel 7 are connected through the bolt 10.

And a sealing ring is embedded on the piston 5.

And the outer cylinder barrel 7 is provided with a plurality of half embedded grooves for placing the multistage excitation coils 8 along the axial direction of the wall barrel.

In the embodiment, the magnetorheological fluid 11 is filled in the inner cylinder 3, the through hole is formed in the center of the bottom of the inner cylinder and communicated with the middle cylinder 4, and the middle cylinder 4 is sleeved outside the inner cylinder; one end of the piston rod 2 is arranged outside the inner cylinder 3 and is fixedly connected with the upper lifting ring 1, and the other end of the piston rod 2 is arranged inside the inner cylinder 3 and is fixedly connected with the piston 5; the floating piston 6 is arranged in the middle cylinder barrel 4, the air inlet 13 is arranged above the outer part of the middle cylinder barrel 4, and the outer cylinder barrel 7 is sleeved outside the middle cylinder barrel 4; inert gas 12 is filled in the upper end, namely the inner upper space, of the floating piston 6, and magnetorheological fluid 11 is filled in the lower end, namely the inner lower space, of the floating piston 6; the multi-stage excitation coil 8 is arranged in the outer cylinder barrel 7, and the lower part of the outer cylinder barrel 7 is fixedly connected with the lower lifting ring 9; the inner cylinder barrel 3, the middle cylinder barrel 4 and the outer cylinder barrel 7 are fixedly connected at the bottom by the bolt 10 on the premise of ensuring the coaxiality. The magnetorheological fluid 11 can flow in the inner cylinder 3 and the middle cylinder 4; an inert gas 12 is filled in the upper portion inside the middle cylinder tube 4. The floating piston 6 is nested between the inner cylinder barrel 3 and the outer cylinder barrel 7, is arranged in the middle cylinder barrel 4, can move up and down along the axial direction of the inner cylinder barrel 3, and is used for dividing the inert gas 12 and the magnetorheological fluid 11. The number of the multi-stage magnet exciting coils 8 is multiple groups, and different groups and different current combination control are carried out on the multi-stage magnet exciting coils 8. The multi-stage magnet exciting coil 8 is arranged in the outer cylinder barrel 7 and does not move along with the movement of the piston 5, so that the resistance flow channel can be changed from a movable flow channel into a static flow channel, the deformation risk of the flow channel is reduced, and the resistance output stability is improved. The cylinder wall of the middle cylinder barrel 4 is made of magnetic conductive materials; and the air inlet 13 is fixedly arranged on the outer wall of the middle cylinder barrel 4, is communicated with the middle cylinder barrel 4 and ensures good air tightness.

The floating piston 6 is arranged in the middle cylinder barrel 4 and used for separating the inert gas 12 from the magnetorheological fluid 11, the floating piston, the inert gas 12 and the upper part of the middle cylinder barrel 4 form a compensation air cavity, and a long damping flow channel is formed by the floating piston and the lower part of the middle cylinder barrel 4. The air inlet door is fixedly arranged outside the middle cylinder barrel 4, is communicated with the middle cylinder barrel 4 and is used for filling inert gas 12.

The outer cylinder barrel 7 can be provided with a plurality of half embedded grooves along the axial direction of the wall barrel, and is provided with a plurality of stages of magnet exciting coils 8 for realizing the multi-stage control of the damping force output of the magnetorheological fluid 11. The cylinder barrels are fixedly connected at the bottom by bolts 10, and the axes of the cylinder barrels are ensured to be on the same straight line.

The realization principle of the invention is as follows: through the arrangement of a plurality of cylinder barrels, the multistage excitation coils 8 are arranged externally, so that the length of an effective flow channel of the damper magnetorheological fluid 11 is increased, the movable flow channel is changed into a static flow channel, the deformation risk of the flow channel is reduced, and the stability of the damper is improved; secondly, by the arrangement of the multi-stage magnet exciting coils 8, the stage regulation and control of the damping force can be realized, a larger damping force output range is provided, and the use field of the damper is widened.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and those skilled in the art should understand that the technical solutions of the present invention can be modified or substituted with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.