CN112648320A - High-frequency response damping-adjustable semi-active shock absorber - Google Patents
High-frequency response damping-adjustable semi-active shock absorber Download PDFInfo
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- CN112648320A CN112648320A CN202011602314.0A CN202011602314A CN112648320A CN 112648320 A CN112648320 A CN 112648320A CN 202011602314 A CN202011602314 A CN 202011602314A CN 112648320 A CN112648320 A CN 112648320A
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- valve
- shock absorber
- oil path
- frequency response
- piston
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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
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
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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
-
- 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
- F16F9/3214—Constructional features of pistons
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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
- F16F9/3235—Constructional features of cylinders
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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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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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
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
- F16F9/466—Throttling control, i.e. regulation of flow passage geometry
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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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/04—Frequency effects
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to a high-frequency response damping adjustable semi-active shock absorber which comprises an oil storage cylinder, a working cylinder, a piston rod and a bypass oil path, wherein a conduction one-way valve is arranged between the working cylinder and the oil storage cylinder, two ends of the conduction one-way valve are respectively communicated to the lower end of the working cylinder and the interior of the oil storage cylinder, a piston body is provided with a conduction hole and a piston one-way valve which enable an upper cavity and a lower cavity to be communicated, the bypass oil path comprises a first branch oil path, a second branch oil path and a third branch oil path which are arranged in parallel, a first switch valve and a first pilot valve are connected in series on the first branch oil path, a second switch valve is arranged on the second branch oil path, and a. The invention aims to solve or at least reduce the problem that the traditional passive oil pressure shock absorber cannot be adjusted in real time according to the load and the line condition of a vehicle, and provides a high-frequency response damping adjustable semi-active shock absorber.
Description
Technical Field
The invention relates to the technical field of shock absorbers, in particular to a high-frequency response damping adjustable semi-active shock absorber.
Background
With the high-speed development of railway scale and mileage in China, the requirements of high-speed rail vehicles on riding comfort and running stability are higher and higher. At present, the traditional passive oil pressure shock absorbers are adopted in the shock absorbers of the railway vehicles, the damping characteristics of the shock absorbers are fixed damping coefficients or damping curves which are set by factories, and the shock absorbers cannot be adjusted in real time according to the load of the vehicles and the line conditions. When the line condition, the vehicle speed and the load change, the damping coefficient required by the track bogie system for the shock absorber can change continuously, the damping curve set by the traditional passive shock absorber can only take the compromise value of multiple working conditions, the problem that the damping coefficient cannot meet the damping coefficient required under the actual working conditions due to the setting of the damping coefficient can occur in the actual operation, the comfort and the stability of the vehicle are reduced, and therefore the semi-active shock absorber capable of adjusting the damping force in real time at high frequency is used as the inevitable trend of high-speed track vehicles.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, solve or at least reduce the problem that the traditional passive oil pressure shock absorber cannot be adjusted in real time according to the load and the line condition of a vehicle, and provide a high-frequency response damping adjustable semi-active shock absorber.
The invention is realized by the following technical scheme:
a high-frequency response damping adjustable semi-active shock absorber comprises an oil storage cylinder, a working cylinder, a piston rod and a bypass oil way, wherein the working cylinder is sealed and fixedly sleeved in the oil storage cylinder, the lower end of the piston rod is positioned in the working cylinder and is fixedly provided with a piston body, the piston body is sealed and longitudinally sleeved in the working cylinder in a sliding manner, the working cylinder is divided into an upper cavity and a lower cavity by the piston body, one end of the bypass oil way is communicated with the lower part of the oil storage cylinder, the other end of the bypass oil way is communicated with the upper part of the working cylinder and is positioned above the piston body, the flow direction of the bypass oil way is that the working cylinder flows to the oil storage cylinder, a conduction one-way valve is arranged between the working cylinder and the oil storage cylinder, two ends of the;
the piston body is provided with a conducting hole and a piston one-way valve which enable the upper cavity and the lower cavity to be communicated, and the conducting direction of the piston one-way valve is that the lower cavity flows to the upper cavity;
the bypass oil way comprises a first branch oil way, a second branch oil way and a third branch oil way which are arranged in parallel, a first switch valve and a first pilot valve are sequentially connected in series on the first branch oil way according to the flow direction, a second switch valve is arranged on the second branch oil way, and a first overflow valve is arranged on the third branch oil way.
In order to further implement the present invention, the following technical solutions may be preferably selected:
preferably, the leading-through hole of the piston body is provided with a piston throttle valve.
Preferably, a first throttling valve is further arranged on the third branch oil path, and the first throttling valve is located behind the first overflow valve.
Preferably, the high-frequency response damping adjustable semi-active shock absorber comprises a stretching stage and a compressing stage when working, when the piston rod drives the piston body to move upwards in the stretching stage, the piston rod drives the piston body to move downwards in the compressing stage.
Preferably, when the high-frequency response damping adjustable semi-active shock absorber is in a stretching stage, the energizing current of the first pilot valve is 0.3A-1.6A;
when the high-frequency response damping adjustable semi-active shock absorber is in a compression stage, the electrifying current of the first pilot valve is not more than 2A.
Through the technical scheme, the invention has the beneficial effects that:
the invention relates to a semi-active high-frequency response shock absorber with a bypass control oil way and oil single circulation. Through the high-frequency action control to first ooff valve, second ooff valve and first pilot valve in the bypass oil circuit, adjust shock absorber fluid restriction area in real time, realized that shock absorber damping force is adjustable with three kinds of modes high frequency fast, promptly: extreme fast response mode, continuously adjustable mode, passive mode. The first switch valve, the second switch valve and the first pilot valve can realize the quick response of the damping force less than or equal to 50 ms; the redundant backup design of the control oil way throttling system can ensure that the shock absorber can normally run in a passive mode with a proper fixed damping curve when the electrical control fails.
Drawings
FIG. 1 is a hydraulic schematic of the present invention;
FIG. 2 is a hydraulic schematic of the invention in a compressed state with minimal damping;
FIG. 3 is a hydraulic schematic diagram of the present invention with adjustable damping in the compressed state;
FIG. 4 is a hydraulic schematic of the maximum damping of the present invention in a compressed state;
FIG. 5 is a hydraulic schematic of the intermediate damping of the present invention in a compressed state;
FIG. 6 is a hydraulic schematic of the invention in tension with minimal damping;
FIG. 7 is a hydraulic schematic diagram of the present invention with adjustable damping in tension;
FIG. 8 is a hydraulic schematic of the maximum damping of the present invention in tension;
FIG. 9 is a hydraulic schematic of the intermediate damping of the present invention in tension;
wherein: 1-oil storage cylinder; 2-a working cylinder; 3-a piston rod; 4-bypass oil circuit; 5-a piston body; 6-an upper chamber; 7-a lower cavity; 8-conducting one-way valve; 9-piston check valve; 10-piston throttle valve; 11-a first on-off valve; 12-a first pilot valve; 13-a second on-off valve; 14-a first overflow valve; 15-a first throttle valve; 401 — a first branch oil path; 402-second branch oil path; 403-third branch oil path.
Detailed Description
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 1-9, the high-frequency response damping adjustable semi-active shock absorber comprises an oil storage cylinder 1 and a working cylinder 2, the working cylinder 2 is hermetically and fixedly sleeved in the oil storage cylinder 1, the lower end of the piston rod 3 is positioned in the working cylinder 2 and is fixedly provided with a piston body 5, the piston body 5 is hermetically and longitudinally sleeved in the working cylinder 2 in a sliding manner, the working cylinder 2 is divided into an upper cavity 6 and a lower cavity 7 by the piston body 5, one end of the bypass oil way 4 is communicated with the lower part of the oil storage cylinder 1, the other end of the bypass oil way is communicated with the upper part of the working cylinder 2 and is positioned above the piston body 5, the flow direction of the bypass oil way 4 is that the working cylinder 2 flows to the oil storage cylinder 1, a conduction one-way valve 8 is arranged between the working cylinder 2 and the oil storage cylinder 1, two ends of the conduction one-way valve 8 are respectively communicated to the lower end of the;
the piston body 5 is provided with a conducting hole and a piston one-way valve 9 which enable the upper cavity 6 and the lower cavity 7 to be communicated, the conducting direction of the piston one-way valve 9 is that the lower cavity 7 flows to the upper cavity 6, and the conducting hole of the piston body 5 is provided with a piston throttle valve 10;
the bypass oil path 4 includes a first branch oil path 401, a second branch oil path 402, and a third branch oil path 403 that are arranged in parallel, the first branch oil path 401 is sequentially connected in series with a first open/close valve 11 and a first pilot valve 12 in a flow direction, the second branch oil path 402 is provided with a second open/close valve 13, and the third branch oil path 403 is sequentially connected in series with a first relief valve 14 and a first throttle valve 15 in a flow direction.
The work of the invention can be divided into two motion processes of compression and stretching, and the implementation mode of the damping force adjustment of the shock absorber in the two processes is as follows:
and (3) stretching: the piston body 5 moves upwards, the piston one-way valve 9 is closed, the space of the upper cavity 6 of the working cylinder 2 is reduced, and the oil liquid flows into the oil storage cylinder 1 through the bypass oil path 4. Meanwhile, the space of the lower cavity 7 of the working cylinder 2 is expanded to generate negative pressure, the oil storage cylinder 1 is communicated with the one-way valve 8 to be opened, and oil which flows back to the oil storage cylinder 1 flows into the space of the lower cavity 7 of the working cylinder 2 to compensate the expansion through the communicated one-way valve 8. When the first switch valve 11 is opened, the second switch valve 13 is opened, and the first pilot valve 12 is not electrified, the oil flows back to the oil storage cylinder 1 through the first branch oil path 401 and the second branch oil path 402 in parallel, the oil path throttling area is the largest, and the shock absorber is in the minimum damping state; when the first on-off valve 11 is closed and the second on-off valve 13 is closed, oil in the upper chamber 6 of the working cylinder 2 can only flow into the lower piston chamber 7 through the piston throttle 10. Meanwhile, the upper cavity 6 has a part of volume occupied by the piston rod 3, so that the volume of oil flowing into the lower cavity 7 from the upper cavity 6 is smaller than the enlarged volume of the lower cavity 7, the oil storage cylinder 1 is communicated with the one-way valve 8 to be opened, the oil in the oil storage cylinder 1 flows into the lower cavity 7 to compensate the equivalent volume of the piston rod 3, the throttling area of the oil path is only the piston throttle valve 10 in the state, and the shock absorber is in the maximum damping force state; when the first switch valve 11 is opened, the second switch valve 13 is closed, and the first pilot valve 12 is electrified (current is 0.3A-1.6A), the oil in the piston upper chamber 6 flows into the oil storage chamber through the first switch valve 11 and the first pilot valve 12 by the first branch oil path 401, the oil path throttling area is controlled by the opening degree of the first pilot valve 12, and the shock absorber is in a damping adjustable state at the moment; when the first switch valve 11 is opened, the second switch valve 13 is closed, and the pilot valves are not powered on, the oil in the upper chamber 6 flows into the oil storage cylinder 1 through the first branch oil path 401, at this time, the throttle area of the oil path is the maximum throttle area of the first pilot valve 12, the damping force is not adjustable and is an intermediate value, and at this time, the shock absorber is in an intermediate damping passive mode.
A compression stage: the piston body 5 moves downwards, the piston check valve 9 is opened, the oil in the lower cavity 7 flows into the upper cavity 6 through the piston check valve 9, and as a part of the volume of the upper cavity 6 is occupied by the piston rod 3, the volume of the oil flowing into the upper cavity 6 in the lower cavity 7 is larger than the expanded volume of the upper cavity 6, and the oil equivalent to the section volume of the piston rod 3 flows back to the oil storage cylinder 1 through the bypass oil path 4. When the first switch valve 11 is opened, the second switch valve 13 is opened, and the first pilot valve 12 is not electrified, the oil directly flows back to the oil storage cylinder 1 through the first branch oil path 401 and the second branch oil path 402 in parallel, the oil path throttling area is the largest, and the shock absorber is in the minimum damping state; when the first switch valve 11 is closed and the second switch valve 13 is closed, the redundant oil flowing into the upper chamber 6 can only flow into the third branch oil path 403, when the oil pressure is greater than the spring pre-tightening force of the first overflow valve 14, the oil flows through the first overflow valve 14, the first throttle valve 15 flows back to the oil storage cylinder 1, at this time, the throttle area is only the throttle area of the first throttle valve 15, the throttle area is the minimum, and the throttle area is the maximum damping state; when the first switch valve 11 is opened, the second switch valve 13 is closed, and the first pilot valve 12 is electrified (the current is less than or equal to 2A), the redundant oil flowing into the upper chamber 6 flows back to the oil storage cylinder 1 through the first branch oil path 401 and the first switch valve 11 and the first pilot valve 12, the oil path throttling area is controlled by the opening degree of the first pilot valve 12, and the shock absorber is in a damping continuously adjustable state; when the first switch valve 11 is opened, the second switch valve 13 is closed, and the first pilot valve 12 is not electrified, the oil in the upper chamber 6 directly flows into the oil storage cylinder 1 through the first branch oil path 401, at this time, the oil path throttling area is the maximum throttling area of the first pilot valve 12, the damping force is not adjustable, the damping force is an intermediate value, and at this time, the shock absorber is in an intermediate damping passive mode.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. A high-frequency response damping adjustable semi-active shock absorber comprises an oil storage cylinder (1), a working cylinder (2), a piston rod (3) and a bypass oil way (4), wherein the working cylinder (2) is hermetically and fixedly sleeved in the oil storage cylinder (1), the lower end of the piston rod (3) is positioned in the working cylinder (2) and is fixedly provided with a piston body (5), the piston body (5) is hermetically and longitudinally sleeved in the working cylinder (2) in a sliding manner, the working cylinder (2) is divided into an upper cavity (6) and a lower cavity (7) by the piston body (5), one end of the bypass oil way (4) is communicated with the lower part of the oil storage cylinder (1), the other end of the bypass oil way is communicated with the upper part of the working cylinder (2) and is positioned above the piston body (5), and the circulation direction of the bypass oil way (4) is that the working cylinder (2) flows to the oil storage cylinder (1), and is characterized in that a conduction one, two ends of the conduction one-way valve (8) are respectively communicated to the lower end of the working cylinder (2) and the interior of the oil storage cylinder (1), and the conduction direction of the conduction one-way valve (8) is that the oil storage cylinder (1) flows to the working cylinder (2);
the piston body (5) is provided with a conducting hole and a piston one-way valve (9) which enable the upper cavity (6) to be communicated with the lower cavity (7), and the conducting direction of the piston one-way valve (9) is that the lower cavity (7) flows to the upper cavity (6);
the bypass oil path (4) comprises a first branch oil path (401), a second branch oil path (402) and a third branch oil path (403) which are arranged in parallel, the first branch oil path (401) is sequentially connected with a first switch valve (11) and a first pilot valve (12) in series according to the flowing direction, the second branch oil path (402) is provided with a second switch valve (13), and the third branch oil path (403) is provided with a first overflow valve (14).
2. A high frequency response damping tunable semi-active shock absorber according to claim 1, characterized in that the leading through of the piston body (5) is provided with a piston throttle (10).
3. A high frequency response damping tunable semi-active shock absorber according to claim 1, wherein the third branch oil path (403) is further provided with a first throttle valve (15), and the first throttle valve (15) is located behind the first overflow valve (14).
4. The high frequency response damping adjustable semi-active shock absorber according to claim 1, wherein the operation of the high frequency response damping adjustable semi-active shock absorber comprises a stretching stage and a compressing stage, in the stretching stage, the piston rod (3) drives the piston body (5) to move up, and in the compressing stage, the piston rod (3) drives the piston body (5) to move down.
5. The high frequency response damping tunable semi-active shock absorber according to claim 4, wherein when the high frequency response damping tunable semi-active shock absorber is in a stretching stage, the energizing current of the first pilot valve (12) is 0.3A-1.6A;
when the high-frequency response damping adjustable semi-active shock absorber is in a compression stage, the electrifying current of the first pilot valve (12) is not more than 2A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011602314.0A CN112648320A (en) | 2020-12-29 | 2020-12-29 | High-frequency response damping-adjustable semi-active shock absorber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011602314.0A CN112648320A (en) | 2020-12-29 | 2020-12-29 | High-frequency response damping-adjustable semi-active shock absorber |
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| CN112648320A true CN112648320A (en) | 2021-04-13 |
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| CN202011602314.0A Pending CN112648320A (en) | 2020-12-29 | 2020-12-29 | High-frequency response damping-adjustable semi-active shock absorber |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237645A (en) * | 2021-05-08 | 2021-08-10 | 苏克执行器(宁波)有限公司 | Multifunctional testing machine for electric actuator |
| CN113586645A (en) * | 2021-06-08 | 2021-11-02 | 合肥工业大学 | Multistage adjusting damping valve, shock absorber using damping valve and suspension system |
| CN113719482A (en) * | 2021-08-30 | 2021-11-30 | 湖南三一中益机械有限公司 | Hydraulic system and paver |
| CN114704588A (en) * | 2022-01-26 | 2022-07-05 | 陈昱洲 | Damping vibration attenuation device with parallel damping branches |
| WO2023202021A1 (en) * | 2022-04-19 | 2023-10-26 | 中车青岛四方机车车辆股份有限公司 | Yaw damper, yaw damper system and control method therefor, and railway vehicle |
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2020
- 2020-12-29 CN CN202011602314.0A patent/CN112648320A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237645A (en) * | 2021-05-08 | 2021-08-10 | 苏克执行器(宁波)有限公司 | Multifunctional testing machine for electric actuator |
| CN113237645B (en) * | 2021-05-08 | 2022-11-18 | 苏克执行器(宁波)有限公司 | Multifunctional testing machine for electric actuator |
| CN113586645A (en) * | 2021-06-08 | 2021-11-02 | 合肥工业大学 | Multistage adjusting damping valve, shock absorber using damping valve and suspension system |
| CN113586645B (en) * | 2021-06-08 | 2022-08-12 | 合肥工业大学 | Multistage adjusting damping valve, shock absorber using damping valve and suspension system |
| CN115234598A (en) * | 2021-06-08 | 2022-10-25 | 合肥工业大学 | Multi-stage pilot valve and multi-stage adjusting damping valve with same |
| CN115263976A (en) * | 2021-06-08 | 2022-11-01 | 合肥工业大学 | Actuator with multi-stage adjusting damping valve |
| CN115263976B (en) * | 2021-06-08 | 2024-05-28 | 合肥工业大学 | Multistage regulating damping valve |
| CN115234598B (en) * | 2021-06-08 | 2024-05-28 | 合肥工业大学 | Multistage pilot valve and multistage regulating damping valve with same |
| CN113719482A (en) * | 2021-08-30 | 2021-11-30 | 湖南三一中益机械有限公司 | Hydraulic system and paver |
| CN114704588A (en) * | 2022-01-26 | 2022-07-05 | 陈昱洲 | Damping vibration attenuation device with parallel damping branches |
| CN114704588B (en) * | 2022-01-26 | 2024-01-09 | 陈昱洲 | Parallel damping branch damping vibration attenuation device |
| WO2023202021A1 (en) * | 2022-04-19 | 2023-10-26 | 中车青岛四方机车车辆股份有限公司 | Yaw damper, yaw damper system and control method therefor, and railway vehicle |
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