CN119508419B - Damper with axial flow channel for position-sensitive characteristics - Google Patents
Damper with axial flow channel for position-sensitive characteristicsInfo
- Publication number
- CN119508419B CN119508419B CN202411723277.7A CN202411723277A CN119508419B CN 119508419 B CN119508419 B CN 119508419B CN 202411723277 A CN202411723277 A CN 202411723277A CN 119508419 B CN119508419 B CN 119508419B
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- CN
- China
- Prior art keywords
- piston
- damper
- axial flow
- outer cylinder
- flow channel
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
Abstract
本发明公开了具有轴向流道可实现位置敏感特性的阻尼器，阻尼器外筒，阻尼器外筒内滑动连接有活塞组件，通过活塞组件将阻尼器外筒的内腔分隔为上腔室和下腔室，活塞组件位于上腔室的一侧设置有活塞杆，活塞杆远离活塞组件的一端贯穿阻尼器外筒并位于阻尼器外筒的外侧，阻尼外筒和活塞组件之间还设置有轴向流道筒，轴向流道筒开有若干均匀分布的轴向流道，轴向流道在不同位置的宽度不同。本发明的阻尼器阻尼系数可以随活塞相对阻尼器筒的位置不同而实时改变，实现了单出杆结构阻尼器的位移敏感，且保证活塞不径向偏移。
The present invention discloses a damper having an axial flow channel that can realize position-sensitive characteristics, a damper outer tube, and a piston assembly slidably connected to the damper outer tube. The inner cavity of the damper outer tube is divided into an upper chamber and a lower chamber by the piston assembly. A piston rod is provided on one side of the piston assembly located in the upper chamber. The end of the piston rod away from the piston assembly passes through the damper outer tube and is located on the outside of the damper outer tube. An axial flow channel tube is also provided between the damper outer tube and the piston assembly. The axial flow channel tube has a plurality of evenly distributed axial flow channels, and the width of the axial flow channels varies at different positions. The damping coefficient of the damper of the present invention can change in real time with the position of the piston relative to the damper tube, thereby realizing the displacement sensitivity of the single-rod structure damper and ensuring that the piston does not deviate radially.
Description
Technical Field
The invention relates to the technical field of shock absorption, in particular to a damper with an axial flow channel and capable of realizing position sensitivity.
Background
With the continuous improvement of riding comfort requirements of people, the application of the variable damping coefficient damper in the automobile suspension is more and more widespread, wherein the application of the variable damping coefficient damper is more and more magneto-rheological damper with damping coefficient adjusted by adjusting magnetic field intensity and CDC damper with damping coefficient adjusted by adjusting flow passage size. However, since they have a delay of several tens to hundreds of milliseconds for the adjustment of the damping coefficient, they have poor suppression effects on high-frequency vibrations, particularly shocks.
The damping coefficient of the displacement sensitive damper and the relative position of the piston and the damper outer barrel can be changed along with the change of the position of the piston. Because no current is required for adjustment of the damping coefficient of the displacement sensitive damper, there is no response delay of the current and the magnetic field. Can achieve delay-free adjustment and has obvious inhibition effect on high-frequency vibration and impact.
However, the damping gap of the traditional displacement sensitive damper is an annular gap between the piston and the outer cylinder of the damper, and only a double-output rod mode can be adopted to ensure that the piston does not deviate radially. However, compared with a damper with a single-rod structure, the double-rod structure has the advantages that the stroke is shortened, the application scene is limited, and the requirements of the variable inner diameter cylinder and the double-rod structure on the machining precision are extremely high, so that the double-rod structure is difficult to popularize.
Disclosure of Invention
Based on the technical problems in the background art, the damper with the axial flow channel capable of realizing the position sensitivity characteristic is provided, the damping coefficient of the damper can be changed in real time along with the different positions of the piston relative to the damper cylinder, the displacement sensitivity of the damper with the single-rod structure is realized, and the piston is ensured not to deviate radially.
The damper with the axial flow passage capable of realizing the position sensitivity characteristic comprises a damper outer cylinder, wherein a piston assembly is connected in a sliding manner in the damper outer cylinder, an inner cavity of the damper outer cylinder is divided into an upper cavity and a lower cavity through the piston assembly, a piston rod is arranged on one side of the piston assembly, which is located in the upper cavity, one end of the piston rod, which is far away from the piston assembly, penetrates through the damper outer cylinder and is located on the outer side of the damper outer cylinder, an axial flow passage cylinder is further arranged between the damper outer cylinder and the piston assembly, a plurality of uniformly distributed axial flow passages are formed in the axial flow passage cylinder, and the widths of the axial flow passages at different positions are different.
Preferably, the width of the axial flow channel decreases from the middle to both ends.
Preferably, the piston assembly comprises a piston core, a groove for installing the exciting coil extends inwards from the outer circumference of the piston core, a piston core end cover is arranged on one side of the piston core, which is located in the lower cavity, and the piston core end cover is connected with the piston core through a fastener.
Preferably, a coil sealing ring is sleeved outside the exciting coil, the coil sealing ring completely covers the exciting coil, and the outer diameter of the coil sealing ring is not larger than the maximum outer diameter of the piston core.
Preferably, a wire outlet hole is arranged in the piston rod, an excitation coil lead wire is arranged in the wire outlet hole, and the excitation coil lead wire is connected with the excitation coil.
Preferably, the piston assembly comprises a piston core, a groove for installing an excitation coil is formed in the inner periphery of the outer periphery of the piston core, an annular flow channel is formed in the piston core, a piston upper cover and a piston lower cover are respectively arranged at two ends of the piston core, an upper magnetic conduction plate is arranged between the piston upper cover and the excitation coil, a lower magnetic conduction plate is arranged between the piston lower cover and the excitation coil, a piston outer cylinder is further sleeved on the piston core, the piston outer cylinder is in sliding connection with the axial flow channel cylinder, and the piston upper cover and the piston lower cover are positioned in the piston outer cylinder and are in butt joint with the piston core through the piston outer cylinder.
Preferably, a coil sealing ring is arranged between the exciting coil and the annular runner, and the coil sealing ring completely covers the exciting coil.
Preferably, a wire outlet hole is arranged in the piston rod, an excitation coil lead wire is arranged in the wire outlet hole, and the excitation coil lead wire passes through a piston core wire outlet and a wire outlet of the lower magnetic conduction plate to be connected with the excitation coil.
Preferably, a guide is further arranged in the upper chamber, and the piston rod penetrates through the guide.
Preferably, a floating piston is further arranged in the lower cavity, one side, away from the piston assembly, of the floating piston forms an air cavity, and the air cavity is provided with an air charging and discharging port.
The beneficial technical effects of the invention are as follows:
The axial flow channel is arranged on the damper outer cylinder, the widths of the axial flow channel at different positions are different, the position sensitivity characteristic is realized, the axial flow channel can use a single-output rod structure, the problem that a traditional displacement sensitive damper piston can deviate radially in the damper outer cylinder is solved, the effective stroke of the position sensitive damper is increased, in addition, the axial flow channel can be processed by cutting a cylindrical hollow cylinder through laser, compared with the traditional position sensitive damper, the processing difficulty is greatly reduced, the cost is obviously reduced, and the processing precision requirement is reduced.
Drawings
FIG. 1 is a schematic structural view of a damper with axial flow channel capable of realizing position sensitivity according to embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of an axial flow cartridge according to the present invention;
FIG. 3 is a schematic view showing the structure of a piston assembly according to embodiment 1 of the present invention;
FIG. 4 is a schematic structural view of a damper with axial flow channel capable of realizing position sensitivity according to embodiment 2 of the present invention;
fig. 5 is a schematic structural view of a piston assembly according to embodiment 2 of the present invention.
In the figure, a 1-exciting coil lead, a 2-piston rod, a 3-wire outlet, a 4-guider, a 5-damper outer cylinder, a 6-axial runner cylinder, a 7-upper chamber, an 8-piston assembly, a 801-piston core, an 802-exciting coil, a 803-coil sealing ring, a 804-piston core end cover, a 805-fastener, a 806-piston lower cover, a 807-piston core wire outlet, a 808-piston outer cylinder, a 809-lower magnetic conduction plate, a 810-upper magnetic conduction plate, a 811-piston upper cover, a 812-annular runner, a 9-axial runner, a 10-lower chamber, a 11-floating piston, a 12-air cavity and a 13-charging and discharging port.
Detailed Description
The invention is further illustrated below in connection with specific embodiments.
Example 1
Referring to fig. 1, the damper with the axial flow passage capable of realizing the position sensitivity characteristic provided by the invention comprises a damper outer cylinder 5, a piston assembly 8 is slidably connected in the damper outer cylinder 5, an inner cavity of the damper outer cylinder 5 is divided into an upper cavity 7 and a lower cavity 10 by the piston assembly 8, a piston rod 2 is arranged on one side of the piston assembly 8, one end of the piston rod 2, which is far away from the piston assembly 8, penetrates through the damper outer cylinder 5 and is positioned on the outer side of the damper outer cylinder 5, an axial flow passage cylinder 6 is further arranged between the damper outer cylinder 5 and the piston assembly 8, the axial flow passage cylinder 6 is provided with a plurality of uniformly distributed axial flow passages 9, the axial flow passages 9 are different in width at different positions, a guide 4 is further arranged in the upper cavity 7, the piston rod 2 penetrates through the guide 4, a sealing piece and a guide sleeve are arranged between the guide sleeve, a lower cavity 12 is further arranged in the lower cavity 10, an air cavity 12 is formed on one side of the floating piston 11, which is far away from the piston assembly, an air cavity 13 is formed, the floating piston moves up and down along with the up and down movement of a piston core to compensate for the volume of the damper outer cylinder moving up and down along with the piston core, the piston cylinder is capable of moving up and down, and the air is simultaneously a certain volume of the piston rod is provided with a certain air volume by the piston and is capable of moving up and down.
Referring to fig. 2, as a preferred embodiment of the present invention, the width of the axial flow channel 9 may be set to decrease from the middle to both ends, or may be an axial flow channel of other shapes, and the specific shape may be designed according to actual needs, and the axial flow channel cylinder is made of 304 stainless steel, and is non-magnetic, so as to prevent the magnetic field generated by the exciting coil from leaking through the axial flow channel cylinder.
Referring to fig. 3, as a preferred embodiment of the present invention, the piston assembly 8 includes a piston core 801, a groove for installing an exciting coil 802 is extended inward from the outer circumference of the piston core 801, a piston core end cap 804 is provided on one side of the piston core 801 located in the lower chamber 10, the piston core end cap 804 is connected to the piston core 801 by a fastening member (such as a fastening screw) 805, and magnetically conductive 20# steel materials can be used for the piston core and the piston core end cap.
In addition, a coil sealing ring 803 is sleeved outside the exciting coil 802, the coil sealing ring 803 completely covers the exciting coil 802, the outer diameter of the coil sealing ring 803 is not larger than the maximum outer diameter of the piston core 801, the coil sealing ring is in interference fit with the piston core and an end cover of the piston core, and sealing glue is coated at the fit position to prevent magnetorheological fluid from entering the exciting coil. A wire outlet hole 3 is arranged in the piston rod 2, an exciting coil lead 1 is arranged in the wire outlet hole 3, and the exciting coil lead 1 is connected with an exciting coil 802.
The damping channel in the scheme has only axial flow channels formed among the piston, the axial flow channel barrel and the damper outer barrel, the axial flow channels are distributed in the whole travel range, the flow channel area is largest in the middle area, and the flow channel area gradually decreases towards the two ends. And the intensity of the magnetic field flowing out of the axial flow channel can be regulated by regulating the current of the exciting coil in the piston, so that the viscosity of the magnetorheological fluid is changed. The damping size of the damper is regulated by controlling the position and the current, a magnetic field generated by the exciting coil forms a loop among the piston core, the piston core end cover, the axial flow passage and the damper outer cylinder, the damper outer cylinder is made of magnetic conduction materials, and the axial flow passage cylinder is made of non-magnetic conduction materials.
Example 2
Referring to fig. 4, the damper with the axial flow channel capable of realizing the position sensitivity characteristic provided by the invention comprises a damper outer cylinder 5, a piston assembly 8 is slidably connected in the damper outer cylinder 5, an inner cavity of the damper outer cylinder 5 is divided into an upper cavity 7 and a lower cavity 10 by the piston assembly 8, a piston rod 2 is arranged on one side of the piston assembly 8, which is positioned on the upper cavity 7, one end of the piston rod 2, which is far away from the piston assembly 8, penetrates through the damper outer cylinder 5 and is positioned on the outer side of the damper outer cylinder 5, an axial flow channel cylinder 6 is further arranged between the damper outer cylinder 5 and the piston assembly 8, a plurality of uniformly distributed axial flow channels 9 are formed in the axial flow channel cylinder 6, and the widths of the axial flow channels 9 at different positions are different. The upper chamber 7 is also internally provided with a guide 4, the piston rod 2 penetrates through the guide 4, the guide is provided with a dynamic sealing piece and a guide shaft sleeve between the piston rod and the guide, the lower chamber 10 is internally provided with a floating piston 11, one side of the floating piston 11, which is far away from the piston assembly, forms an air cavity 12, the air cavity 12 is provided with an air charging and discharging port 13, the floating piston moves up and down slightly along with the up and down movement of the piston core to compensate the change of the volume of the piston rod in the outer cylinder of the damper in the process of moving up and down the piston core, a non-magnetic aluminum alloy material can be used, and the air cavity provides a certain pre-pressure for the upper chamber and the lower chamber through filling gas with a certain pressure, and meanwhile, the volume of the piston rod in the process of moving up and down is compensated.
Referring to fig. 2, as a preferred embodiment of the present invention, the width of the axial flow channel 9 may be set to decrease from the middle to both ends, or may be an axial flow channel of other shapes, and the specific shape may be designed according to actual needs, and the axial flow channel cylinder is made of 304 stainless steel, and is non-magnetic, so as to prevent the magnetic field generated by the exciting coil from leaking through the axial flow channel cylinder.
Referring to fig. 5, the piston assembly 8 includes a piston core 801, a groove for mounting an exciting coil 802 extends inward from the outer circumference of the piston core 801, an annular flow passage 812 is provided on the piston core 801, a piston upper cover 811 and a piston lower cover 806 are provided at both ends of the piston core 801, an upper magnetic conductive plate 810 is provided between the piston upper cover 811 and the exciting coil 802, a lower magnetic conductive plate 809 is provided between the piston lower cover 806 and the exciting coil 802, the piston core 801 is further provided with a piston outer cylinder 808 in a sleeved manner, the piston outer cylinder 808 is slidably connected with the axial flow passage cylinder 6, the piston upper cover 811 and the piston lower cover 806 are located in the piston outer cylinder 808, and the piston upper cover 811 and the piston lower cover 806 are abutted against the piston core 801 by the piston outer cylinder 808.
A coil sealing ring 803 is arranged between the exciting coil 802 and the annular flow channel 812, the exciting coil 802 is completely covered by the coil sealing ring 803, the coil sealing ring is in interference fit with the upper magnetic conductive plate and the lower magnetic conductive plate, and sealing glue is coated at the fit position to prevent magnetorheological fluid from entering the exciting coil.
A wire outlet hole 3 is arranged in the piston rod 2, an exciting coil lead 1 is arranged in the wire outlet hole 3, and the exciting coil lead 1 passes through a piston core wire outlet 807 and a wire outlet of the lower magnetic conduction plate 809 to be connected with the exciting coil 801.
The axial flow channels on the axial flow channel cylinder are only distributed in the middle area of the damper stroke, and the piston is provided with an annular flow channel. In the middle region, the flow passage area of the damper is the area of the axial flow passage plus the area of the annular flow passage. At this time, the area of the damping channel is large, and the damping coefficient is small. When the piston moves to a region without an axial flow passage, only the annular flow passage in the piston serves as a damping passage. At this time, the damping channel area is small and the damping coefficient is large. The viscosity of the magnetorheological fluid at the annular flow passage can be regulated by regulating the current of the exciting coil in the piston in the whole stroke range, and the damping coefficient is regulated. The magnetic field generated by the exciting coil forms a loop among the lower magnetic conduction plate, the piston outer cylinder, the upper magnetic conduction plate, the annular flow passage, the piston core and the lower magnetic conduction plate, and the axial flow passage cylinder and the damper outer cylinder are made of non-magnetic conduction materials.
Claims (6)
1. The damper with the axial flow passage capable of realizing the position sensitivity characteristic is characterized by comprising a damper outer cylinder (5), wherein a piston assembly (8) is connected in the damper outer cylinder (5) in a sliding manner, an inner cavity of the damper outer cylinder (5) is divided into an upper cavity (7) and a lower cavity (10) through the piston assembly (8), a piston rod (2) is arranged on one side of the piston assembly (8) positioned in the upper cavity (7), one end of the piston rod (2) away from the piston assembly (8) penetrates through the damper outer cylinder (5) and is positioned on the outer side of the damper outer cylinder (5), an axial flow passage cylinder (6) is further arranged between the damper outer cylinder (5) and the piston assembly (8), a plurality of uniformly distributed axial flow passages (9) are formed in the axial flow passage cylinder (6), and the widths of the axial flow passages (9) at different positions are different;
The piston assembly (8) comprises a piston core (801), a groove for installing an excitation coil (802) is formed in the circumferential inner portion of the outer circumference of the piston core (801), an annular flow passage (812) is formed in the piston core (801), a piston upper cover (811) and a piston lower cover (806) are respectively arranged at two ends of the piston core (801), an upper magnetic conduction plate (810) is arranged between the piston upper cover (811) and the excitation coil (802), a lower magnetic conduction plate (809) is arranged between the piston lower cover (806) and the excitation coil (802), a piston outer cylinder (808) is further sleeved on the piston core (801), the piston outer cylinder (808) is in sliding connection with the axial flow passage cylinder (6), and the piston upper cover (811) and the piston lower cover (806) are arranged in the piston outer cylinder (808) and enable the piston upper cover (811) and the piston lower cover (806) to be in butt against the piston core (801).
2. Damper with axial flow channel realizable position sensitive property according to claim 1, characterized in that the width of the axial flow channel (9) decreases from the middle towards both ends.
3. Damper with axial flow channel realizable position sensitive property according to claim 1, characterized in that a coil sealing ring (803) is arranged between the excitation coil (802) and the annular flow channel (812), the coil sealing ring (803) completely covering the excitation coil (802).
4. The damper with the axial flow passage capable of realizing the position sensitivity characteristic according to claim 1, wherein a wire outlet hole (3) is arranged in the piston rod (2), an exciting coil lead (1) is arranged in the wire outlet hole (3), and the exciting coil lead (1) passes through a piston core wire outlet (807) and a wire outlet of a lower magnetic conduction plate (809) to be connected with the exciting coil (801).
5. Damper with axial flow channel realisable position sensitive characteristic according to claim 1, characterized in that in the upper chamber (7) there is also a guide (4), through which guide (4) the piston rod (2) passes.
6. Damper with axial flow channel realizable position sensitive property according to claim 1, characterized in that a floating piston (11) is also arranged in the lower chamber (10), the side of the floating piston (11) far from the piston assembly constitutes an air cavity (12), the air cavity (12) is provided with an air filling and discharging port (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411723277.7A CN119508419B (en) | 2024-11-28 | 2024-11-28 | Damper with axial flow channel for position-sensitive characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411723277.7A CN119508419B (en) | 2024-11-28 | 2024-11-28 | Damper with axial flow channel for position-sensitive characteristics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN119508419A CN119508419A (en) | 2025-02-25 |
| CN119508419B true CN119508419B (en) | 2025-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202411723277.7A Active CN119508419B (en) | 2024-11-28 | 2024-11-28 | Damper with axial flow channel for position-sensitive characteristics |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6386343B1 (en) * | 2001-04-30 | 2002-05-14 | Delphi Technologies, Inc. | Temperature compensating flux ring |
| CN216111892U (en) * | 2021-07-05 | 2022-03-22 | 郭怀宝 | Hydraulic vibration damping piston for preventing automobile from tilting and hydraulic vibration damper |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6318520B1 (en) * | 1999-09-13 | 2001-11-20 | Delphi Technologies, Inc. | Magnetorheological fluid damper tunable for smooth transitions |
| US6637557B2 (en) * | 2001-08-13 | 2003-10-28 | Delphi Technologies, Inc. | Magnetorheological strut piston with compression bypass |
| CN204985492U (en) * | 2015-10-11 | 2016-01-20 | 华东交通大学 | Flow channel establishes notched magneto rheological damper |
| CN107387651B (en) * | 2017-07-18 | 2019-05-10 | 福州大学 | A variable stiffness magnetorheological damper and its control method |
| CN108561486A (en) * | 2018-04-23 | 2018-09-21 | 福州大学 | A kind of novel anti-settling magnetic rheological liquid damper |
| CN109703762B (en) * | 2018-12-24 | 2020-09-22 | 中国海洋大学 | Helicopter crash-resistant seat based on magnetorheological damper |
| CN218152131U (en) * | 2022-07-19 | 2022-12-27 | 深圳职业技术学院 | Hybrid suspension actuator, suspension system and automobile |
-
2024
- 2024-11-28 CN CN202411723277.7A patent/CN119508419B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6386343B1 (en) * | 2001-04-30 | 2002-05-14 | Delphi Technologies, Inc. | Temperature compensating flux ring |
| CN216111892U (en) * | 2021-07-05 | 2022-03-22 | 郭怀宝 | Hydraulic vibration damping piston for preventing automobile from tilting and hydraulic vibration damper |
Also Published As
| Publication number | Publication date |
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| CN119508419A (en) | 2025-02-25 |
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