CN114508558A - Be used for aircraft undercarriage attenuator wire seal structure - Google Patents
Be used for aircraft undercarriage attenuator wire seal structure Download PDFInfo
- Publication number
- CN114508558A CN114508558A CN202210064179.1A CN202210064179A CN114508558A CN 114508558 A CN114508558 A CN 114508558A CN 202210064179 A CN202210064179 A CN 202210064179A CN 114508558 A CN114508558 A CN 114508558A
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- sealing
- sealing ring
- damper
- hole
- wire
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 164
- 238000013016 damping Methods 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 230000001681 protective effect Effects 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 210000001503 joint Anatomy 0.000 claims description 18
- 238000009434 installation Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 230000002940 repellent Effects 0.000 claims 1
- 239000005871 repellent Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 15
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- F16F9/36—Special sealings, including sealings or guides for piston-rods
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a wire sealing structure for a damper of an aircraft landing gear, which comprises a damper shell, wherein a piston block moving along an inner cavity of the damper shell is arranged in the damper shell, a permanent magnet is arranged at the bottom of the piston block, a protective substrate is arranged at the bottom of the permanent magnet, an electromagnet magnetically repulsive to the permanent magnet is arranged at the bottom of the inner cavity of the damper shell, a protective plate is arranged on the surface of the electromagnet, a sealing strip is arranged between the protective plate and the inner wall of the permanent magnet, a lead hole for a wire on the electromagnet to penetrate out is formed in the damper shell, and a positive pressure sealing mechanism is arranged at the lead hole of the damper shell. The hydraulic damping structure, the spring damping and the electromagnetic damping are combined together in the damper shell, so that the damping effect is effectively improved, and the positive pressure sealing mechanism for sealing the lead on the electromagnet is arranged on the damper shell, so that the damping liquid of the damper shell cannot overflow.
Description
Technical Field
The invention relates to the technical field of dampers, in particular to a wire sealing structure for a damper of an aircraft landing gear.
Background
Low frequency brake induced vibrations of the main landing gear of an aircraft are also referred to as buffeting and the buffeting vibration frequency is typically below 30 Hz. In the whole sliding brake process after the wheels of the main landing gear of the airplane are grounded, under the action of a brake system, the ground binding force caused by the excitation of the brake force changes, the flexibility of the strut of the main landing gear, the joint of the main landing gear and the airplane body are factors such as non-rigid connection and the elasticity of tires, the buffeting phenomenon can occur when the landing gear is subjected to the changed ground tire force, the damper is needed to absorb and damp, the existing damper is combined with electromagnetic damping and hydraulic damping, but the sealing performance of the lead-out end is poor, and the phenomenon of damping fluid leakage exists. We have therefore developed this and propose a wire seal arrangement for an aircraft landing gear damper.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a wire sealing structure of a damper for an aircraft landing gear, which comprises a damper shell, wherein a piston block moving along the inner cavity of the damper shell is arranged in the damper shell, the bottom of the piston block is provided with a permanent magnet, the bottom of the permanent magnet is provided with a protective base plate, the piston block, the permanent magnet and the protective base plate are all provided with damping holes, damping liquid is filled in the inner cavity of the damper shell, an electromagnet which is magnetically repelled from the permanent magnet is arranged at the bottom of the inner cavity of the damper shell, the surface of the electromagnet is provided with a protective plate, a sealing strip is arranged between the protective plate and the inner wall of the permanent magnet, the damper shell is provided with a lead hole for a lead wire on the electromagnet to penetrate through, the damper shell is provided with a positive pressure sealing mechanism at the lead hole, and a damping spring is arranged between the protection plate and the protection substrate, and a piston rod penetrating out of the damper shell is arranged on the piston block.
As a preferred technical scheme of the present invention, the positive pressure sealing mechanism includes a butt joint pipe disposed on the damper housing and located at the periphery of the lead hole, an installation cavity is formed between the butt joint pipe and the outer wall of the damper housing, a first sealing ring block located at the periphery of the lead hole is disposed on the outer wall of the damper housing, a sealing block embedded in the installation cavity is disposed on the lead, a first sealing ring groove for the first sealing ring block to be embedded in is disposed on the sealing block, a sealing cover is disposed on the butt joint pipe, and a positive pressure sealing ring in contact with the first sealing ring block is disposed inside the sealing cover.
As a preferable technical solution of the present invention, the first seal ring block is integrally formed with the lead.
As a preferred technical scheme of the present invention, the positive pressure seal ring includes a seal ring main body, a through hole through which a lead wire passes is provided on the seal ring main body, an annular air chamber provided around the through hole is provided on the seal ring main body, an air inlet pipe communicated with the annular air chamber is provided on the seal ring main body, a check valve is provided on the air inlet pipe, and a through hole through which the air inlet pipe passes is provided on the seal cover.
As a preferable technical solution of the present invention, a second sealing ring groove is formed on a side of the sealing block contacting the positive pressure sealing ring, and a second sealing ring block embedded in the second sealing ring groove is formed on the sealing ring main body.
As a preferable technical scheme of the invention, a locking mechanism is arranged between the sealing cover and the butt joint pipe.
As a preferred technical scheme of the invention, the anti-loosening mechanism comprises a first positioning flange arranged at the port of the sealing cover, a second positioning flange matched with the first positioning flange is arranged on the butt joint pipe, a first arc-shaped through hole is formed in the first positioning flange, a second arc-shaped through hole matched with the first arc-shaped through hole is formed in the second positioning flange, a positioning bolt penetrates through the first arc-shaped through hole and the second arc-shaped through hole, a locking nut group is arranged at the end part of the positioning bolt, and a locking nut at the outermost end of the locking nut group is welded with the positioning bolt.
As a preferred technical solution of the present invention, the first positioning flange and the sealing cover are integrally formed, and the butt pipe and the second positioning flange are integrally formed.
1. The hydraulic damping structure, the spring damping and the electromagnetic damping are combined together in the damper shell, so that the damping effect is effectively improved, the positive pressure sealing mechanism for sealing the wire on the electromagnet is arranged in the damper shell, a sealing block embedded into an installation cavity is mainly arranged on the wire, a first sealing ring groove for embedding the first sealing ring block is formed in the sealing block, a sealing cover is arranged on a butt joint pipe, a positive pressure sealing ring which is in contact with the first sealing ring block in a squeezing mode is arranged in the sealing cover, air is injected into an annular air cavity through an air inlet pipe after the positive pressure sealing ring is installed, so that the positive pressure sealing ring is expanded, the positive pressure sealing ring is tightly attached to the sealing block, a good sealing effect is achieved, and a second sealing ring groove is formed in one side of the sealing block, which is in contact with the positive pressure sealing ring, the sealing ring main body is provided with a second sealing ring block embedded into a second sealing ring groove, so that the sealing block and the positive pressure sealing ring have a good sealing effect, and damping liquid of the damper shell cannot overflow.
2. This kind be arranged in aircraft landing gear attenuator wire seal structure sealed lid and be equipped with locking mechanism between the pipe to having played the effect of location, avoid sealed lid and to take place not hard up between the pipe to drop, mainly be through wear to be equipped with positioning bolt between first arc through-hole and the second arc through-hole, positioning bolt's tip is equipped with lock nut group, the lock nut and the positioning bolt welding of outer end in the lock nut group to sealed lid and to having played the effect of location to the pipe to having guaranteed to have better sealed effect to the wire.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a wire seal structure for an aircraft landing gear damper according to the present invention;
FIG. 2 is a schematic structural view of a positive pressure sealing mechanism for an aircraft landing gear damper wire sealing structure according to the present invention;
FIG. 3 is a schematic structural view of a first seal ring block of the wire seal structure for an aircraft landing gear damper of the present invention;
FIG. 4 is a schematic structural view of a positive pressure seal ring for an aircraft landing gear damper wire seal structure according to the present invention;
fig. 5 is a structural schematic diagram of a looseness-preventing mechanism for a wire sealing structure of an aircraft landing gear damper.
In the figure: 1. a damper housing; 2. a piston block; 3. a permanent magnet; 4. a protective substrate; 5. a damping hole; 6. an electromagnet; 7. a protection plate; 8. a sealing strip; 9. a wire hole; 10. a positive pressure sealing mechanism; 11. butt-joint pipes; 12. a mounting cavity; 13. a first seal ring block; 14. a sealing block; 15. a first seal ring groove; 16. a sealing cover; 17. a positive pressure sealing ring; 18. a seal ring main body; 19. a through hole; 20. an annular air cavity; 21. an air inlet pipe; 22. a one-way valve; 23. perforating; 24. a second seal ring groove; 25. a second seal ring block; 26. a locking mechanism; 27. a first positioning flange; 28. a second positioning flange; 29. a first arcuate through-hole; 30. a second arcuate through hole; 31. positioning the bolt; 32. a lock nut set; 33. a piston rod; 34. a damping spring.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in fig. 1-5, the invention relates to a wire sealing structure for a damper of an aircraft landing gear, which comprises a damper shell 1, wherein a piston block 2 moving along an inner cavity of the damper shell 1 is arranged inside the damper shell 1, a permanent magnet 3 is arranged at the bottom of the piston block 2, a protective substrate 4 is arranged at the bottom of the permanent magnet 3, damping holes 5 are respectively arranged on the piston block 2, the permanent magnet 3 and the protective substrate 4, damping liquid is filled in the inner cavity of the damper shell 1, an electromagnet 6 magnetically repelling the permanent magnet 3 is arranged at the bottom of the inner cavity of the damper shell 1, a protective plate 7 is arranged on the surface of the electromagnet 6, a sealing strip 8 is arranged between the protective plate 7 and the inner wall of the permanent magnet 3, a lead hole 9 for a wire on the electromagnet 6 to penetrate through is arranged on the damper shell 1, and a positive pressure sealing mechanism 10 is arranged at the lead hole of the damper shell 1, a damping spring 34 is arranged between the protection plate and the protection substrate 4, and a piston rod 33 penetrating out of the damper shell 1 is arranged on the piston block 2.
The positive pressure sealing ring 17 comprises a sealing ring main body 18, a through hole 19 for a lead to pass through is formed in the sealing ring main body 18, an annular air cavity 20 arranged around the through hole 19 is formed in the sealing ring main body 18, an air inlet pipe 21 communicated with the annular air cavity 20 is formed in the sealing ring main body 18, a one-way valve 22 is arranged on the air inlet pipe 21, and a through hole 23 for the air inlet pipe 21 to penetrate through is formed in the sealing cover 16.
Through combining the hydraulic damping structure, the spring damping and the electromagnetic damping three together in the damper shell 1, the damping effect is effectively improved, the positive pressure sealing mechanism 10 for sealing the lead on the electromagnet is arranged in the damper shell 1, the sealing block 14 embedded in the installation cavity 12 is mainly arranged on the lead, the first sealing ring groove 15 for embedding the first sealing ring block 13 is arranged on the sealing block 14, the butt joint pipe 11 is provided with the sealing cover 16, the sealing cover 16 is internally provided with the positive pressure sealing ring 17 which is extruded and contacted by the first sealing ring block 13, after the positive pressure sealing ring 17 is installed, air is injected into the annular air cavity 20 through the air inlet pipe 21, so that the positive pressure sealing ring 17 expands, the positive pressure sealing ring 17 is tightly attached to the sealing block 14, a good sealing effect is achieved, and the second sealing ring groove 24 is arranged on one side of the sealing block 14, which is contacted with the positive pressure sealing ring 17, the sealing ring main body 18 is provided with a second sealing ring block 25 embedded into the second sealing ring groove 24, so that the sealing block 14 and the positive pressure sealing ring 17 have a good sealing effect, and the damping liquid of the damper shell 1 cannot overflow.
One side that sealing block 14 and malleation sealing washer 17 contact is equipped with second seal ring groove 24, be equipped with the second seal ring piece 25 of embedding in second seal ring groove 24 on the sealing washer main part 18.
The sealing cover 16 is connected with the butt joint pipe 11 in a threaded mode.
The anti-loosening mechanism 26 is arranged between the sealing cover 16 and the butt joint pipe 11, the positioning effect is achieved, and loosening and falling between the sealing cover and the butt joint pipe are avoided. Locking mechanism 26 is including setting up the first flange 27 in sealed 16 ports department of lid, be equipped with on the butt joint pipe 11 with first flange 27 complex second flange 28, be equipped with first arc through-hole 29 on the first flange 27, be equipped with on the second flange 28 with first arc through-hole 29 matched with second arc through-hole 30, wear to be equipped with positioning bolt 31 between first arc through-hole 29 and the second arc through-hole 30, positioning bolt 31's tip is equipped with lock nut group 32, the lock nut and the positioning bolt 31 welding of outer end in the lock nut group 32. The first positioning flange 27 and the sealing cover 16 are integrally formed, and the butt joint pipe 11 and the second positioning flange 28 are integrally formed, so that the sealing cover and the butt joint pipe are positioned, and a good sealing effect on a lead is ensured.
The working principle is as follows: through combining the hydraulic damping structure, the spring damping and the electromagnetic damping three together in the damper shell 1, the damping effect is effectively improved, the positive pressure sealing mechanism 10 for sealing the lead on the electromagnet is arranged in the damper shell 1, the sealing block 14 embedded in the installation cavity 12 is mainly arranged on the lead, the first sealing ring groove 15 for embedding the first sealing ring block 13 is arranged on the sealing block 14, the butt joint pipe 11 is provided with the sealing cover 16, the sealing cover 16 is internally provided with the positive pressure sealing ring 17 which is extruded and contacted by the first sealing ring block 13, after the positive pressure sealing ring 17 is installed, air is injected into the annular air cavity 20 through the air inlet pipe 21, so that the positive pressure sealing ring 17 expands, the positive pressure sealing ring 17 is tightly attached to the sealing block 14, a good sealing effect is achieved, and the second sealing ring groove 24 is arranged on one side of the sealing block 14, which is contacted with the positive pressure sealing ring 17, the sealing ring main body 18 is provided with a second sealing ring block 25 embedded into the second sealing ring groove 24, so that the sealing block 14 and the positive pressure sealing ring 17 have a good sealing effect, and the damping liquid of the damper shell 1 cannot overflow.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A be used for aircraft landing gear attenuator wire seal structure which characterized in that: comprises a damper shell (1), a piston block (2) moving along an inner cavity of the damper shell (1) is arranged in the damper shell (1), a permanent magnet (3) is arranged at the bottom of the piston block (2), a protective substrate (4) is arranged at the bottom of the permanent magnet (3), damping holes (5) are formed in the piston block (2), the permanent magnet (3) and the protective substrate (4), damping liquid is filled in an inner cavity of the damper shell (1), an electromagnet (6) which is magnetically repellent to the permanent magnet (3) is arranged at the bottom of the inner cavity of the damper shell (1), a protective plate (7) is arranged on the surface of the electromagnet (6), a sealing strip (8) is arranged between the inner walls of the protective plate (7) and the permanent magnet (3), and a lead hole (9) through which a lead on the damper shell (1) is penetrated by a lead wire on the power supply magnet (6), a positive pressure sealing mechanism (10) is arranged at the lead hole of the damper shell (1), and a damping spring (34) is arranged between the protection plate and the protection base plate (4); and a piston rod (33) penetrating out of the damper shell (1) is arranged on the piston block (2).
2. A damper wire sealing structure for an aircraft landing gear according to claim 1, it is characterized in that the positive pressure sealing mechanism (10) comprises a butt joint pipe (11) which is arranged on the damper shell (1) and is positioned at the periphery of the lead hole (9), an installation cavity (12) is formed between the butt joint pipe (11) and the outer wall of the damper shell (1), a first sealing ring block (13) positioned at the periphery of the lead hole (9) is arranged on the outer wall of the damper shell (1), a sealing block (14) embedded into the installation cavity (12) is arranged on the lead, the sealing block (14) is provided with a first sealing ring groove (15) for the first sealing ring block (13) to be embedded into, be equipped with sealed lid (16) on butt joint pipe (11), the internally mounted of sealed lid (16) has first sealing ring piece (13) to crowd malleation sealing washer (17) that touches mutually.
3. A wire sealing structure for aircraft landing gear dampers according to claim 2, characterized in that the first sealing ring block (13) is integrally formed with the wire.
4. The wire sealing structure for the aircraft landing gear damper according to claim 2, wherein the positive pressure sealing ring (17) comprises a sealing ring main body (18), a through hole (19) for a wire to pass through is formed in the sealing ring main body (18), an annular air cavity (20) arranged around the through hole (19) is formed in the sealing ring main body (18), an air inlet pipe (21) communicated with the annular air cavity (20) is formed in the sealing ring main body (18), a one-way valve (22) is arranged on the air inlet pipe (21), and a through hole (23) for the air inlet pipe (21) to pass through is formed in the sealing cover (16).
5. A wire sealing structure for an aircraft landing gear damper according to claim 4, characterized in that a second sealing ring groove (24) is formed in the side of the sealing block (14) contacting the positive pressure sealing ring (17), and a second sealing ring block (25) embedded in the second sealing ring groove (24) is formed on the sealing ring main body (18).
6. A damper wire sealing structure for aircraft landing gear according to claim 2, characterised in that the sealing cover (16) is screwed to the butt pipe (11).
7. A wire sealing structure for an aircraft landing gear damper according to claim 6, characterized in that a locking mechanism (26) is provided between the sealing cover (16) and the butt pipe (11).
8. The wire sealing structure for the aircraft landing gear damper is characterized in that the anti-loosening mechanism (26) comprises a first positioning flange (27) arranged at a port of a sealing cover (16), a second positioning flange (28) matched with the first positioning flange (27) is arranged on the butt joint pipe (11), a first arc-shaped through hole (29) is formed in the first positioning flange (27), a second arc-shaped through hole (30) matched with the first arc-shaped through hole (29) is formed in the second positioning flange (28), a positioning bolt (31) is arranged between the first arc-shaped through hole (29) and the second arc-shaped through hole (30) in a penetrating mode, a locking nut group (32) is arranged at the end of the positioning bolt (31), and the locking nut at the outermost end in the locking nut group (32) is welded with the positioning bolt (31).
9. A damper wire sealing structure for aircraft landing gear according to claim 8, characterised in that the first locating flange (27) is integrally formed with the sealing cover (16) and the interface tube (11) is integrally formed with the second locating flange (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210064179.1A CN114508558B (en) | 2022-01-20 | 2022-01-20 | Wire sealing structure for aircraft landing gear damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210064179.1A CN114508558B (en) | 2022-01-20 | 2022-01-20 | Wire sealing structure for aircraft landing gear damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114508558A true CN114508558A (en) | 2022-05-17 |
| CN114508558B CN114508558B (en) | 2024-03-12 |
Family
ID=81550545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210064179.1A Active CN114508558B (en) | 2022-01-20 | 2022-01-20 | Wire sealing structure for aircraft landing gear damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114508558B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4002188A1 (en) * | 1989-10-04 | 1991-04-11 | Sasse Eugen Gmbh Co Kg Dr | Screened cable entry into electrical or electronic equipment - passes cable core through two tapered inserts which grip braid and compress seal against outward traction |
| US20090084646A1 (en) * | 2007-09-28 | 2009-04-02 | Gm Global Technology Operations, Inc. | Bi-fold valve-type magnetorheological fluid energy absorbing device |
| CN103016599A (en) * | 2012-12-13 | 2013-04-03 | 浙江师范大学 | Integrated type self-powered hydraulic damper |
| CN108167371A (en) * | 2018-02-02 | 2018-06-15 | 山东科技大学 | A kind of new permanent-magnet formula MR damper |
| KR101973696B1 (en) * | 2017-11-03 | 2019-04-30 | 인하대학교 산학협력단 | Mr fluid damper using permanent magnet |
| CN209213609U (en) * | 2018-12-27 | 2019-08-06 | 荣朗防爆科技有限公司 | A kind of explosion suppression type explosion-preventing lamp |
| CN110513431A (en) * | 2019-09-05 | 2019-11-29 | 安徽理工大学 | A kind of magnetoelectricity mix suspending formula hydraulic damper |
| CN211629101U (en) * | 2020-05-25 | 2020-10-02 | 上海润璋智能科技股份有限公司 | Power transistor with protective housing structure |
-
2022
- 2022-01-20 CN CN202210064179.1A patent/CN114508558B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4002188A1 (en) * | 1989-10-04 | 1991-04-11 | Sasse Eugen Gmbh Co Kg Dr | Screened cable entry into electrical or electronic equipment - passes cable core through two tapered inserts which grip braid and compress seal against outward traction |
| US20090084646A1 (en) * | 2007-09-28 | 2009-04-02 | Gm Global Technology Operations, Inc. | Bi-fold valve-type magnetorheological fluid energy absorbing device |
| CN103016599A (en) * | 2012-12-13 | 2013-04-03 | 浙江师范大学 | Integrated type self-powered hydraulic damper |
| KR101973696B1 (en) * | 2017-11-03 | 2019-04-30 | 인하대학교 산학협력단 | Mr fluid damper using permanent magnet |
| CN108167371A (en) * | 2018-02-02 | 2018-06-15 | 山东科技大学 | A kind of new permanent-magnet formula MR damper |
| CN209213609U (en) * | 2018-12-27 | 2019-08-06 | 荣朗防爆科技有限公司 | A kind of explosion suppression type explosion-preventing lamp |
| CN110513431A (en) * | 2019-09-05 | 2019-11-29 | 安徽理工大学 | A kind of magnetoelectricity mix suspending formula hydraulic damper |
| CN211629101U (en) * | 2020-05-25 | 2020-10-02 | 上海润璋智能科技股份有限公司 | Power transistor with protective housing structure |
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| Publication number | Publication date |
|---|---|
| CN114508558B (en) | 2024-03-12 |
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