CN205260716U - Magneto rheological damper with two -stage damping force output control - Google Patents
Magneto rheological damper with two -stage damping force output control Download PDFInfo
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- CN205260716U CN205260716U CN201620006403.1U CN201620006403U CN205260716U CN 205260716 U CN205260716 U CN 205260716U CN 201620006403 U CN201620006403 U CN 201620006403U CN 205260716 U CN205260716 U CN 205260716U
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- end cap
- damper
- piston
- piston head
- cavity volume
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Abstract
The utility model discloses a magneto rheological damper with two -stage damping force output control mainly comprises piston rod, attenuator end cover, attenuator cylinder body, piston head, piston head end cover, piston sleeve, an excitation coil, the 2nd excitation coil and spring etc.. When switching on for an excitation coil and the 2nd excitation coil respectively, flow channel leads to entirely, seals to hold chamber I and seal the pressure differential that holds chamber II little, and the output damping force is also little, and this is first kind of operating condition of attenuator. When excitation coil circular telegram, when the 2nd excitation coil cut off the power supply, the flow channel part was stopped up, sealed and held chamber I and the closed pressure differential increase of holding chamber II, and the output damping force also increases thereupon, and this is the second kind operating condition of attenuator. The utility model discloses under the prerequisite that does not increase overall dimension, circular telegram through the 2nd excitation coil and outage can effectively realize the output of two -stage damping force, trade damping system such as specially adapted automobile, building.
Description
Technical field
The utility model relates to a kind of MR damper, relates in particular to a kind of MR damper that the output of two-stage damping force is controlled that has.
Background technology
The feature of the Millisecond response speed that MR damper has, large control range and large damping force output, makes it become half outstanding active actuators part of industrial application. At present, MR damper has been widely used in the aspects such as the vibration damping of vibration damping antidetonation system, rail vehicles and the automobile suspension system of building and bridge.
When MR damper work, often the runner of magnetic flow liquid is arranged on the closed-loop path of controllable magnetic field, in the time of damper piston and cylinder body generation relative motion, magnetic flow liquid flows in runner, excitation field by control action on flux circuit just can change the shear stress of magnetic flow liquid, realizes the step-less adjustment of damper output damping force.
Traditional MR damper, the magnetic flow liquid runner that an annular is normally set on piston head carries out damping force control, this is for the occasion of low speed, such as the suspension system of car or train, can meet the demands at aspects such as controllable damping force, controllable damping ratio and controllable speed scopes. but along with the increase of the speed (movement velocity of piston) encouraging, the viscous damping force of traditional MR damper is quadratic power ratio and rises. the increase of piston speed will significantly reduce controllable damping ratio and the controlled speed scope of MR damper, for (piston speed > 1m/s) application scenario at a high speed, such as panzer pilot set suspension, offroad vehicle impact energy absorb system and other vehicular traffics, and CAS and the aircraft landing system etc. of helicopter, viscous damping force will be very large, this can cause the controllable damping ratio of MR damper to approximate 1, because now viscous damping force approximates total power output of MR damper, so in order to meet the application requirements of high-speed applications, generally realize by sacrificing the controllable damping force of MR damper and the operating efficiency of flux circuit, this is because the viscous damping force of traditional MR damper can be realized reduction by the efficiency that reduces the total power output of MR damper and field circuit.
Therefore, need to design a kind of Novel magneto-rheological damper, not only be applicable to high speed situation but also can control low speed vibration, thus the performance of raising MR damper.
Summary of the invention
In order to overcome the problem existing in background technology and to meet MR damper actual operation requirements, the utility model proposes a kind of MR damper that the output of two-stage damping force is controlled that has. Piston head right end cap is installed in conventional damper piston head, has been milled out an annular groove in the right side of piston head, for laying the second magnet exciting coil; On piston head right end cap, mill out three counterbore grooves that are connected with magnetic flow liquid passage, for magnetic flow liquid circulation; Be equipped with spring and spring movable block at piston head right end cap notch near piston head direction. At the first magnet exciting coil normal power-up and electrical current constant in the situation that, in the time of the second magnet exciting coil energising, spring contraction, spring movable block is drawn and near the second magnet exciting coil, now, fluid course is all-pass to piston head direction, be not subject to any obstruction, in the time that piston rod stretches, magnetic flow liquid can flow to sealing cavity volume II from sealing cavity volume I, and sealing cavity volume I can be very not large with the pressure differential of sealing cavity volume II, therefore output damping force is also little; At this moment the damping force of output is applicable to control low speed vibration occasion. In the time of the second magnet exciting coil power-off, spring will no longer shrink, and spring movable block can be pushed to piston head right end cap direction, and fluid course part is blocked. In the time that piston rod stretches, magnetic flow liquid flows to sealing cavity volume II by restricted from sealing cavity volume I, sealing cavity volume I has increased many with the pressure differential of sealing cavity volume II before, therefore can export very large damping force, at this moment the damping force of output is applicable to slow down the vibratory impulse occasion causing at a high speed. This structural design provides the output of two-stage damping force by the circulation passage of restriction magnetic flow liquid. Do not increasing under the prerequisite of damping clearance length and electric current, larger output damping force can be provided, be specially adapted to the industry such as automobile, building vibration insulating system.
The utility model solves the technical scheme that its technical problem adopts and comprises: piston rod (1), sealing ring I (2), screw I (3), piston head left end cap (4), sealing ring II (5), piston head (6), the second magnet exciting coil (7), spring (8), spring movable block (9), floating piston (10), sealing ring III (11), sealing ring IV (12), right hanger (13), damper right end cap (14), screw II (15), damper cylinder body (16), piston head right end cap (17), screw III (18), the first magnet exciting coil (19), piston sleeve (20), screw IV (21), screw V (22), sealing ring V (23), damper left end cap (24) and left hanger (25), piston rod (1) is connected by screw threads for fastening with left hanger (25), in the middle of damper left end cap (24), be processed with manhole, piston rod (1) coordinates with damper left end cap (24) manhole internal surface gaps, piston rod (1) seals by sealing ring I (2) with damper left end cap (24) manhole inner surface, damper left end cap (24) and damper cylinder body (16) left side matched in clearance, damper left end cap (24) is fixedly connected with by screw I (3) with damper cylinder body (16), between damper left end cap (24) and damper cylinder body (16), seal by sealing ring V (23), piston head left end cap (4) is fixedly connected with by screw IV (21) with piston sleeve (20), piston head left end cap (4) is fixedly connected with by screw V (22) with piston head (6), piston head right end cap (17) is fixedly connected with by screw III (18) with piston sleeve (20), piston rod (1) right-hand member is processed with external screw thread, piston head left end cap (4) center is processed with through hole, piston head (6) center, left side is processed with internal thread hole, piston rod (1) and piston head left end cap (4) interference fit, piston rod (1) is connected by screw threads for fastening with piston head (6), piston sleeve (20) seals by sealing ring II (5) with damper cylinder body (16), between piston head (6) outer surface and piston sleeve (20) inner surface, be provided with the annular fluid course passing through for magnetic flow liquid, the first magnet exciting coil (19) is wrapped in the groove of piston head (6) outer surface, two lead-in wires of the first magnet exciting coil (19) are drawn by the wire lead slot of piston head (6) outer surface and the fairlead of piston rod (1), the second magnet exciting coil (7) is wrapped in the groove of piston head (6) right side, mutually vertical with the canoe of the first magnet exciting coil (19), the lead-in wire of the second magnet exciting coil (7) is drawn by the fairlead in the middle of piston head (6) and the fairlead of piston rod (1), piston head right end cap (17) is provided with three counterbore grooves that are axially evenly arranged, and spring movable block (9) is placed in piston head right end cap (17) counterbore groove, spring (8) is placed in spring movable block (9) counterbore groove, floating piston (10) outer surface coordinates with damper cylinder body (16) internal surface gaps, floating piston (10) seals by sealing ring III (11) with damper cylinder body (16), damper right end cap (14) and damper cylinder body (16) right side matched in clearance, damper right end cap (14) is fixedly connected with by screw II (15) with damper cylinder body (16), damper right end cap (14) seals by sealing ring IV (12) with damper cylinder body (16), damper right end cap (14) right-hand member is fixedly connected with by screw thread with right hanger (13). between damper left end cap (24), piston head left end cap (4) and damper cylinder body (16), surround sealing cavity volume I, between piston head right end cap (17), damper cylinder body (16) and floating piston (10), surround sealing cavity volume II, between floating piston (10), damper cylinder body (16) and damper right end cap (14), surround sealing cavity volume III, in sealing cavity volume I and sealing cavity volume II, fill magnetic flow liquid, in sealing cavity volume III, fill Compressed Gas, when piston rod (1) is in axial direction when Tensile, the magnetic flow liquid in sealing cavity volume I enters sealing cavity volume II through fluid course, when piston rod (1) is in axial direction by compression time, the magnetic flow liquid in sealing cavity volume II enters sealing cavity volume I through fluid course, when piston rod (1) in axial direction moves, can there is respective change in the volume of sealing cavity volume I and sealing cavity volume II, and now floating piston (10) can float to realize volume compensation by the left and right of axial direction.
The utility model is compared with background technology, and the beneficial effect having is:
(1), the utility model MR damper is at the first magnet exciting coil normal power-up and electrical current constant in the situation that, in the time of the second magnet exciting coil energising, spring contraction, spring movable block is drawn and near the second magnet exciting coil to piston head direction, now, fluid course is not subject to any obstruction, what when piston rod stretches, magnetic flow liquid can be unimpeded flows to sealing cavity volume II from sealing cavity volume I, sealing cavity volume I is little with the pressure differential of sealing cavity volume II, therefore output damping force is also large, now the damping force of output can be controlled low speed vibration. In the time of the second magnet exciting coil power-off, spring will no longer shrink, and spring movable block can be pushed to piston head right end cap direction, and fluid course part is blocked. Now, when piston rod stretches, magnetic flow liquid is restricted flows to sealing cavity volume II from sealing cavity volume I, the pressure reduction of sealing cavity volume I and sealing cavity volume II has increased many, therefore exportable larger damping force is now exported damping force and is applicable to slow down the vibratory impulse occasion causing at a high speed. This structural design can effectively provide the output of two-stage damping force by the circulation of restriction magnetic flow liquid.
(2), compared with traditional MR damper, the utility model damper adopts in piston head right side and piston head right end cap is installed second magnet exciting coil, can control output two-stage damping force constant in the situation that at the first magnet exciting coil electric current. Do not increasing under the prerequisite of damping clearance length and electric current, a larger output damping force can be provided, be specially adapted to the industry such as automobile, building vibration insulating system.
(3), the utility model MR damper part piston head used left end cap (4), piston head (6), spring movable block (9), piston sleeve (20) and piston head right end cap (17) are made up of mild steel permeability magnetic material respectively; Remaining parts is made by non-magnet_conductible material. The effect of vertical magnetic field to magnetic flow liquid given full play in this design, also can allow the second magnet exciting coil make easily spring contraction, and spring movable block (9) is inhaled toward the second magnet exciting coil direction, makes damper can export accurately two-stage damping force.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is that the utility model magnetic line of force distributes and effective damping gap schematic diagram.
Fig. 3 is the utility model the first duty.
Fig. 4 is the utility model the second duty.
Fig. 5 is the right view of the utility model spring movable block.
The magnetic flow liquid fluid course schematic diagram of flowing through when Fig. 6 is the utility model piston rod Tensile.
Fig. 7 is the side view of the utility model piston head left end cap.
Fig. 8 is the side view of the utility model piston head right end cap.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail:
As shown in Figure 1, the utility model comprises: piston rod (1), sealing ring I (2), screw I (3), piston head left end cap (4), sealing ring II (5), piston head (6), the second magnet exciting coil (7), spring (8), spring movable block (9), floating piston (10), sealing ring III (11), sealing ring IV (12), right hanger (13), damper right end cap (14), screw II (15), damper cylinder body (16), piston head right end cap (17), screw III (18), the first magnet exciting coil (19), piston sleeve (20), screw IV (21), screw V (22), sealing ring V (23), damper left end cap (24) and left hanger (25).
Fig. 2 is that the utility model magnetic line of force distributes and effective damping gap schematic diagram. Wherein, annular fluid course left end and piston head left end cap (4) waist through hole form first paragraph effective damping gap IV; Annular fluid course right-hand member and piston head right end cap (17) waist through hole form second segment effective damping gap V.
Fig. 3 is the utility model the first duty. In the time that the second magnet exciting coil (7) is switched on, spring (8) shrinks, spring movable block (9) is drawn and near the second magnet exciting coil (7) to piston head (6) direction, now, fluid course all-pass and be not subject to any obstruction, magnetic flow liquid flows to sealing cavity volume II from sealing cavity volume I, and sealing cavity volume I is little with the pressure reduction of sealing cavity volume II, therefore output damping force is also little, this is the first duty of damper.
Fig. 4 is the utility model the second duty. In the time of the second magnet exciting coil (7) power-off, spring (8) will no longer shrink, and spring movable block (9) can be pushed to piston head right end cap (17) direction, and fluid course part is blocked. Now, magnetic flow liquid is restricted flows to sealing cavity volume II from sealing cavity volume I, and the pressure reduction of sealing cavity volume I and sealing cavity volume II has increased many, therefore exportable larger damping force, this is the second duty of damper.
Fig. 5 is the right view of the utility model spring movable block (9). Wherein, be processed with 3 waist through hole that are circumferentially evenly arranged in spring movable block (9) position corresponding with fluid course. In the time that damper is operated in the second duty, this design can make spring movable block (9) that fluid course part is blocked.
The magnetic flow liquid fluid course schematic diagram of flowing through when Fig. 6 is the utility model piston rod Tensile. When piston rod (1) is in axial direction when Tensile, the magnetic flow liquid in sealing cavity volume I enters sealing cavity volume II through fluid course.
Fig. 7 is the side view of the utility model piston head left end cap. Wherein, the position corresponding with fluid course is processed with 2 waist through hole that are circumferentially evenly arranged; Two waist through hole form magnetic flow liquid access way.
Fig. 8 is the side view of the utility model piston head right end cap. Wherein, the position corresponding with fluid course is processed with 2 waist through hole mouths that are circumferentially evenly arranged; Be milled with two counterbore grooves at piston head right end cap, one horizontal one vertical, horizontal counterbore groove is used for placing spring movable block (9) and as magnetic flow liquid access way, vertical little counterbore groove and horizontal counterbore groove are interconnective, for the circulation passage of magnetic flow liquid turnover; Go out a counterbore groove at two waist through hole opposite positions from the oblique groove milling in left surface of piston head right end cap and enter piston head right end cap, be then connected with horizontal counterbore groove.
The utility model operation principle is as follows:
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, at the first magnet exciting coil (19) normal power-up and electrical current constant in the situation that, in the time that the second magnet exciting coil (7) is switched on, spring (8) shrinks, spring movable block (9) is drawn to piston head (6) direction, now, fluid course all-pass, magnetic flow liquid flows to sealing cavity volume II from sealing cavity volume I, sealing cavity volume I is little with the pressure reduction of sealing cavity volume II, therefore output damping force is also little, this is the first duty of damper. In the time of the second magnet exciting coil (7) power-off, spring (8) will no longer shrink, and spring movable block (9) can be pushed to piston head right end cap (17) direction, and fluid course part is blocked. Now magnetic flow liquid is restricted seals cavity volume II from the sealing cavity volume I flow direction, and the pressure reduction of sealing cavity volume I and sealing cavity volume II increases many before, therefore exportable larger damping force, this is the second duty of damper. By controlling the second magnet exciting coil (7), can make damper effectively export two-stage damping force.
Claims (2)
1. one kind has the MR damper that the output of two-stage damping force is controlled, it is characterized in that comprising: piston rod (1), sealing ring I (2), screw I (3), piston head left end cap (4), sealing ring II (5), piston head (6), the second magnet exciting coil (7), spring (8), spring movable block (9), floating piston (10), sealing ring III (11), sealing ring IV (12), right hanger (13), damper right end cap (14), screw II (15), damper cylinder body (16), piston head right end cap (17), screw III (18), the first magnet exciting coil (19), piston sleeve (20), screw IV (21), screw V (22), sealing ring V (23), damper left end cap (24) and left hanger (25), piston rod (1) is connected by screw threads for fastening with left hanger (25), in the middle of damper left end cap (24), be processed with manhole, piston rod (1) coordinates with damper left end cap (24) manhole internal surface gaps, piston rod (1) seals by sealing ring I (2) with damper left end cap (24) manhole inner surface, damper left end cap (24) and damper cylinder body (16) left side matched in clearance, damper left end cap (24) is fixedly connected with by screw I (3) with damper cylinder body (16), between damper left end cap (24) and damper cylinder body (16), seal by sealing ring V (23), piston head left end cap (4) is fixedly connected with by screw IV (21) with piston sleeve (20), piston head left end cap (4) is fixedly connected with by screw V (22) with piston head (6), piston head right end cap (17) is fixedly connected with by screw III (18) with piston sleeve (20), piston rod (1) right-hand member is processed with external screw thread, piston head left end cap (4) center is processed with through hole, piston head (6) center, left side is processed with internal thread hole, piston rod (1) and piston head left end cap (4) interference fit, piston rod (1) is connected by screw threads for fastening with piston head (6), piston sleeve (20) seals by sealing ring II (5) with damper cylinder body (16), between piston head (6) outer surface and piston sleeve (20) inner surface, be provided with the annular fluid course passing through for magnetic flow liquid, the first magnet exciting coil (19) is wrapped in the groove of piston head (6) outer surface, two lead-in wires of the first magnet exciting coil (19) are drawn by the wire lead slot of piston head (6) outer surface and the fairlead of piston rod (1), the second magnet exciting coil (7) is wrapped in the groove of piston head (6) right side, mutually vertical with the canoe of the first magnet exciting coil (19), the lead-in wire of the second magnet exciting coil (7) is drawn by the fairlead in the middle of piston head (6) and the fairlead of piston rod (1), piston head right end cap (17) is provided with three counterbore grooves that are axially evenly arranged, and spring movable block (9) is placed in piston head right end cap (17) counterbore groove, spring (8) is placed in spring movable block (9) counterbore groove, floating piston (10) outer surface coordinates with damper cylinder body (16) internal surface gaps, floating piston (10) seals by sealing ring III (11) with damper cylinder body (16), damper right end cap (14) and damper cylinder body (16) right side matched in clearance, damper right end cap (14) is fixedly connected with by screw II (15) with damper cylinder body (16), damper right end cap (14) seals by sealing ring IV (12) with damper cylinder body (16), damper right end cap (14) right-hand member is fixedly connected with by screw thread with right hanger (13).
2. a kind of MR damper that the output of two-stage damping force is controlled that has according to claim 1, is characterized in that: between damper left end cap (24), piston head left end cap (4) and damper cylinder body (16), surround sealing cavity volume I; Between piston head right end cap (17), damper cylinder body (16) and floating piston (10), surround sealing cavity volume II; Between floating piston (10), damper cylinder body (16) and damper right end cap (14), surround sealing cavity volume III; In sealing cavity volume I and sealing cavity volume II, fill magnetic flow liquid; In sealing cavity volume III, fill Compressed Gas; When piston rod (1) is in axial direction when Tensile, the magnetic flow liquid in sealing cavity volume I enters sealing cavity volume II through fluid course; When piston rod (1) is in axial direction by compression time, the magnetic flow liquid in sealing cavity volume II enters sealing cavity volume I through fluid course; When piston rod (1) in axial direction moves, can there is respective change in the volume of sealing cavity volume I and sealing cavity volume II, and now floating piston (10) can float to realize volume compensation by the left and right of axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620006403.1U CN205260716U (en) | 2016-01-04 | 2016-01-04 | Magneto rheological damper with two -stage damping force output control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620006403.1U CN205260716U (en) | 2016-01-04 | 2016-01-04 | Magneto rheological damper with two -stage damping force output control |
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| Publication Number | Publication Date |
|---|---|
| CN205260716U true CN205260716U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620006403.1U Expired - Fee Related CN205260716U (en) | 2016-01-04 | 2016-01-04 | Magneto rheological damper with two -stage damping force output control |
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| CN (1) | CN205260716U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402256A (en) * | 2016-11-29 | 2017-02-15 | 哈尔滨工业大学 | Multichannel magnetorheological damper with built-in parallel coils |
| CN108757816A (en) * | 2018-07-23 | 2018-11-06 | 重庆理工大学 | It is a kind of to recycle thermal energy and the raw electric MR damper of chemistry under power failure state |
| CN110778636A (en) * | 2019-11-26 | 2020-02-11 | 重庆大学 | Bidirectional independent controllable magneto-rheological damper |
-
2016
- 2016-01-04 CN CN201620006403.1U patent/CN205260716U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402256A (en) * | 2016-11-29 | 2017-02-15 | 哈尔滨工业大学 | Multichannel magnetorheological damper with built-in parallel coils |
| CN108757816A (en) * | 2018-07-23 | 2018-11-06 | 重庆理工大学 | It is a kind of to recycle thermal energy and the raw electric MR damper of chemistry under power failure state |
| CN110778636A (en) * | 2019-11-26 | 2020-02-11 | 重庆大学 | Bidirectional independent controllable magneto-rheological damper |
| CN110778636B (en) * | 2019-11-26 | 2021-04-06 | 重庆大学 | Bidirectional independent controllable magneto-rheological damper |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 Termination date: 20170104 |
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| CF01 | Termination of patent right due to non-payment of annual fee |