CN117028473A - Built-in magneto-rheological valve type damper - Google Patents
Built-in magneto-rheological valve type damper Download PDFInfo
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- CN117028473A CN117028473A CN202310967713.4A CN202310967713A CN117028473A CN 117028473 A CN117028473 A CN 117028473A CN 202310967713 A CN202310967713 A CN 202310967713A CN 117028473 A CN117028473 A CN 117028473A
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- Prior art keywords
- piston
- valve block
- magnetorheological
- valve
- damper
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000012530 fluid Substances 0.000 claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 27
- 239000010724 circulating oil Substances 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 8
- 239000000306 component Substances 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 6
- 239000008358 core component Substances 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 239000002775 capsule Substances 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims description 2
- 238000013016 damping Methods 0.000 abstract description 16
- 238000007906 compression Methods 0.000 abstract description 6
- 230000006835 compression Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- WKPSFPXMYGFAQW-UHFFFAOYSA-N iron;hydrate Chemical compound O.[Fe] WKPSFPXMYGFAQW-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
-
- 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
- F16F9/537—Magnetorheological [MR] fluid dampers specially adapted valves therefor
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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
The invention discloses a built-in magnetorheological valve type damper which comprises a cylinder barrel, a piston head mechanism, a cylinder barrel end cover and a piston rod, wherein the cylinder barrel is matched with a cylinder bottom, the piston head mechanism is arranged, and the piston rod is penetrated through the cylinder barrel end cover and matched with the piston head mechanism to be connected and arranged; the piston head mechanism comprises a piston outer cylinder, an iron core assembly arranged in the piston outer cylinder, a valve plate assembly arranged at the end part of the piston outer cylinder and a rubber bag assembly arranged in the piston outer cylinder and used for being matched with the valve plate assembly, and the valve plate assembly is used for controlling the flow of hydraulic oil in the cylinder barrel and forming different circulating oil paths; according to the built-in magneto-rheological valve type damper, hydraulic oil is used as a working medium, a small amount of magneto-rheological fluid is used as a control medium, and compared with the magneto-rheological fluid, the density of the hydraulic oil is smaller, so that the weight of the damper is reduced; a small amount of magnetorheological fluid is used as a control medium, so that the manufacturing cost of the damper is saved, and the damping force of the stretching working condition and the compression working condition of the damper can be independently regulated, so that the damping effect of the damper is better.
Description
Technical Field
The invention relates to the field of magnetorheological vibration reduction, in particular to a built-in magnetorheological valve type damper.
Background
The magneto-rheological fluid is a magneto-sensitive intelligent material, the rheological behavior of the magneto-rheological fluid is controllable, and the yield stress of the magneto-rheological fluid monotonically increases along with the increase of the magnetic induction intensity. The magnetorheological fluid is composed of ferromagnetic particles and a carrier fluid, and various additives are usually added for improving the physical and chemical properties of the magnetorheological fluid, wherein the ferromagnetic particles are usually nanoscale hydroxy iron powder, the carrier fluid is usually silicone oil, and the prepared magnetorheological fluid is high in price due to high price of the hydroxy iron powder. The magnetorheological fluid has quick response and response time of less than 10ms, so that an interface with compact structure, quick response, energy conservation and environmental protection can be provided between an electronic control system and a mechanical system through the magnetorheological technology. At present, the magnetorheological fluid is widely applied to various technical fields including dampers, valves, brakes and the like.
The magneto-rheological damper is used as a semi-active intelligent device, and the output damping force of the magneto-rheological damper is adjustable and controllable. The vibration damper is applied to vibration damping of equipment, can directly replace an original passive damper, does not need to change the existing layout of the equipment, saves the installation and use cost, can achieve the effect similar to active vibration damping by matching with a proper control algorithm, and is widely focused by students at home and abroad. The existing magnetorheological damper can be generally divided into: flow, squeeze, shear, and mixed mode. However, in any working mode, the magnetorheological fluid is used as a working medium, so that the magnetorheological damper is high in quality and price. Under the action of ferromagnetic particles in the magnetorheological fluid, the sealing element of the magnetorheological damper is severely worn, so that the sealing problem of the magnetorheological damper is difficult to effectively solve.
For this reason, a new built-in magnetorheological valve type damper is required for solving the above-mentioned problems.
Disclosure of Invention
In view of the above, the built-in magnetorheological valve type damper of the technical scheme uses hydraulic oil as a working medium and uses a small amount of magnetorheological fluid as a control medium, so that compared with the magnetorheological fluid, the density of the hydraulic oil is smaller, and the weight of the damper is reduced; a small amount of magnetorheological fluid is used as a control medium, so that the manufacturing cost of the damper is saved, and the damping force of the stretching working condition and the compression working condition of the damper can be independently regulated, so that the damping effect of the damper is better.
A damper with a built-in magnetorheological valve comprises a cylinder barrel, a piston head mechanism, a cylinder barrel end cover and a piston rod, wherein the cylinder barrel is matched with a cylinder bottom, the piston head mechanism can slide back and forth along the axis direction of the cylinder barrel, the cylinder barrel end cover is arranged at the right end of the cylinder barrel, and the piston rod is arranged through the cylinder barrel end cover in a penetrating manner and matched with the piston head mechanism in a connecting manner; the piston head mechanism comprises a piston outer cylinder which can be slidably arranged in the cylinder barrel, an iron core assembly which is arranged in the piston outer cylinder, a valve plate assembly which is arranged at the end part of the piston outer cylinder and a rubber bag assembly which is arranged in the piston outer cylinder and is used for being matched with the valve plate assembly, and the valve plate assembly is used for controlling hydraulic oil in the cylinder barrel to flow and forming different circulating oil paths.
Further, the valve block subassembly includes cooperation piston urceolus fixed mounting's piston end cover, installs the check valve block on the piston end cover, laminating low pressure valve block and the high pressure valve block of piston end cover installation, the low pressure valve block is arranged between check valve block and high pressure valve block, be provided with the one-way runner that the cooperation check valve block used, the low pressure runner that the cooperation low pressure valve block used and the high pressure runner that the cooperation high pressure valve block used on the piston end cover, check valve block, low pressure valve block and high pressure valve block all pass through retaining member fixed mounting on the piston end cover.
Further, the rubber bag component comprises a rubber bag, a rubber bag fixing plate, a magnetorheological valve plate and a valve plate fixing plate, wherein the rubber bag fixing plate is arranged in the rubber bag and matched with the iron core component to be fixedly installed, the magnetorheological valve plate is installed on the surface of the rubber bag, the valve plate fixing plate is arranged in the rubber bag and matched with the magnetorheological valve plate to be fixedly installed, the reset spring is sleeved on the outer circumferential surface of the rubber bag and used for being quickly reset, and magnetorheological fluid matched with the iron core component to be used is filled in the rubber bag.
Further, the magnetorheological valve block is outwards protruded along the axial direction to form a valve block protruding ball matched with the low-pressure valve block, the valve block protruding ball is propped against the surface of the low-pressure valve block, and the rubber bag is matched with the valve block protruding ball of the magnetorheological valve block to apply elastic pretightening force to the low-pressure valve block. The outer circular surface of the magneto-rheological valve plate is contacted with the inner wall of the piston outer cylinder to play a supporting and guiding role. The magnetorheological valve plate is provided with a gap, and hydraulic oil flows through the gap when flowing through the gap.
Further, the iron core assembly comprises an iron core arranged in the outer piston cylinder and an excitation coil wound on the iron core, a positioning step used for installing the iron core is formed in the outer piston cylinder, and an iron core positioning block matched with the positioning step is formed in an outward protruding mode of the outer circumference of the iron core along the radial direction.
Further, the whole drum-shaped structure that is big in middle part of the piston urceolus is little at both ends, be provided with the positioning sleeve of cooperation inner core location installation in the piston urceolus, piston end cover cooperation piston urceolus fixed mounting and support the tight iron core through the positioning sleeve.
Further, the valve block components are installed at two ends of the piston outer cylinder, the diameter of the low-pressure valve block is larger than that of the high-pressure valve block, the unidirectional flow channel and the low-pressure flow channel are arranged on the same circumference of the piston end cover, and the diameter of the piston end cover where the high-pressure flow channel is arranged is smaller than that of the piston end cover where the low-pressure flow channel is arranged.
Further, the rubber capsule is provided with a magnetorheological fluid plug, the valve block convex balls are a plurality of and are uniformly distributed on the magnetorheological valve block, and the valve block convex balls are abutted against the low-pressure valve block and are not in contact with the high-pressure valve block.
Further, a floating piston is mounted between the cylinder bottom and the piston head mechanism.
The beneficial effects of the invention are as follows:
1. the built-in magneto-rheological valve type damper uses hydraulic oil as a working medium and uses a small amount of magneto-rheological liquid as a control medium. Compared with magnetorheological fluid, the hydraulic oil has smaller density, and the hydraulic oil is used as a working medium, so that the weight of the damper is reduced; the magnetorheological fluid is high in price, only a small amount of magnetorheological fluid is used as a control medium, and the manufacturing cost of the damper is saved;
2. the conventional magnetorheological damper uses magnetorheological fluid as a working medium, so that the sealing piece of the magnetorheological damper is seriously worn, the problem of liquid leakage is difficult to effectively solve, and the conventional magnetorheological damper uses common hydraulic oil as the working medium, so that the sealing is easier, and the service life of the damper is prolonged;
3. the maximum damping force and the minimum damping force of the built-in magneto-rheological valve type damper can be adjusted by replacing the internal high-pressure valve plate and the low-pressure valve plate, so that the built-in magneto-rheological valve type damper is suitable for the requirements of different working conditions, and has a wider application range;
4. the damping force of the stretching working condition and the compression working condition of the damper with the built-in magneto-rheological valve can be independently adjusted, so that the damping effect of the damper is better.
Drawings
The invention is further described below with reference to the accompanying drawings and examples:
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic end view of a piston head mechanism;
FIG. 3 is a cross-sectional view A-A;
FIG. 4 is a schematic view of a bladder assembly installation;
FIG. 5 is a schematic diagram of a piston end cap;
fig. 6 is a schematic diagram of a core structure;
FIG. 7 is a schematic view of a valve plate fixing plate;
FIG. 8 is a schematic diagram of a magneto-rheological valve sheet;
fig. 9 is a schematic view of the piston outer cylinder.
Detailed Description
FIG. 1 is a schematic diagram of the overall structure of the present invention; FIG. 2 is a schematic end view of a piston head mechanism; FIG. 3 is a cross-sectional view A-A; FIG. 4 is a schematic view of a bladder assembly installation; FIG. 5 is a schematic diagram of a piston end cap; fig. 6 is a schematic diagram of a core structure; FIG. 7 is a schematic view of a valve plate fixing plate; FIG. 8 is a schematic diagram of a magneto-rheological valve sheet; fig. 9 is a schematic view of a piston outer cylinder, as shown in the drawing, a damper with a built-in magnetorheological valve, which comprises a cylinder barrel 26 mounted in cooperation with a cylinder bottom 1, a piston head mechanism capable of sliding back and forth along the axial direction of the cylinder barrel (i.e. the horizontal direction in fig. 1), a cylinder barrel end cover 13 mounted at the right end of the cylinder barrel (the cylinder barrel end cover is provided with a sealing groove for mounting a sealing element), and a piston rod 14 penetrating the cylinder barrel end cover and mounted in cooperation with the piston head mechanism; the piston head mechanism comprises a piston outer cylinder 21 slidably arranged in a cylinder barrel, an iron core assembly arranged in the piston outer cylinder 21, a valve plate assembly arranged at the end part of the piston outer cylinder 21 and a rubber bag assembly arranged in the piston outer cylinder and used for being matched with the valve plate assembly, wherein the valve plate assembly is used for controlling the flow of hydraulic oil in the cylinder barrel and forming different circulating oil paths (the cylinder barrel 26 is filled with hydraulic oil, and the hydraulic oil is compressed and restored through the piston head mechanism so that different circulating channels exist when the hydraulic oil passes through the piston head mechanism); according to the built-in magneto-rheological valve type damper, hydraulic oil is used as a working medium, a small amount of magneto-rheological fluid is used as a control medium, and compared with the magneto-rheological fluid, the density of the hydraulic oil is smaller, so that the weight of the damper is reduced; a small amount of magnetorheological fluid is used as a control medium, so that the manufacturing cost of the damper is saved, and the damping force of the stretching working condition and the compression working condition of the damper can be independently regulated, so that the damping effect of the damper is better.
In this embodiment, the valve block subassembly includes cooperation piston urceolus 21 fixed mounting's piston end cover 6, installs the check valve block 5 on piston end cover 6, laminating low pressure valve block 7 and the high pressure valve block 24 of piston end cover 6 installation, low pressure valve block 7 arranges between check valve block 5 and high pressure valve block 24, be provided with the one-way runner 27 that cooperation check valve block 5 used, the low pressure runner 28 that cooperation low pressure valve block 7 used and the high pressure runner 29 that cooperation high pressure valve block 24 used on the piston end cover, check valve block, low pressure valve block and high pressure valve block all pass through retaining member fixed mounting on the piston end cover. The left valve plate assembly of the piston head mechanism is fixedly arranged on the piston outer cylinder 21 through the piston end cover 6, the one-way valve plate 5 is attached to the left end part of the piston end cover 6, the low-pressure valve plate 7 and the high-pressure valve plate are arranged in a cavity between the piston end cover 6 and the rubber bag assembly, the three valve plates are locked through the fastening bolts 4 at the left end (the right end is locked through the fastening bolts matched with the piston rod), in order to prevent the valve plates from rotating, the positioning keys 25 are correspondingly arranged, valve plate holes are correspondingly formed in the three valve plates and are correspondingly matched with the one-way flow passage 27, the low-pressure flow passage 28 and the high-pressure flow passage 29, the piston rod drives the piston head mechanism to reciprocate, so that hydraulic oil can realize control and adjustment through different flow passages in the movement process (when the piston rod 14 moves leftwards, the cylinder barrel is compressed, otherwise, the piston rod returns).
In this embodiment, the rubber bag assembly includes a rubber bag 10, a rubber bag fixing plate 12 disposed in the rubber bag 10 and fixedly mounted with the iron core assembly, a magnetorheological valve sheet 17 mounted on the surface of the rubber bag 10, and a valve sheet fixing plate 18 disposed in the rubber bag 10 and fixedly mounted with the magnetorheological valve sheet 17, wherein magnetorheological fluid 30 used with the iron core assembly is filled in the rubber bag. The rubber bag component is arranged at the end part of the iron core, the rubber bag 10 is fixedly connected with the iron core 11 through the rubber bag fixing plate 12 and the fastening screw 19, the other end of the rubber bag 10 is fixedly connected with the magnetorheological valve plate 17 (the magnetorheological valve plate 17 is provided with a plurality of positioning hole structures and is matched with the positioning parts of the fixing plate) through the positioning screw 8 through the valve plate fixing plate 18 (the valve plate fixing plate 18 is provided with three fixing plate positioning parts for positioning and mounting by matching with other parts), the magnetorheological fluid 30 is filled in the rubber bag 10 and used for controlling and adjusting the supporting performance of the whole rubber bag component so as to realize the control and adjustment of the valve opening pressure of the low-pressure valve plate, the opening or closing of the low-pressure channel 28 is realized, the reset spring 22 is sleeved on the outer circumferential surfaces of the rubber bag and the iron core, the upper end and the lower end of the reset spring 22 are respectively abutted between the magnetorheological valve plate 17 and the iron core 11, and the reset spring 22 is used for quickly resetting the rubber bag component.
In this embodiment, the magnetorheological valve 17 is formed with a valve block convex ball 171 protruding outwards along the axial direction, the valve block convex ball 171 is propped against the surface of the low-pressure valve block 7, and the rubber bag is used for applying elastic pre-tightening force to the low-pressure valve block 7 in cooperation with the valve block convex ball 171 of the magnetorheological valve block. The magnetorheological valve sheet 17 is pressed on the low-pressure valve sheet by the valve sheet convex ball 171 under the elastic force of the rubber bag, and when the exciting coil 20 is not electrified, the valve opening pressure of the low-pressure valve sheet is small, and the output damping force of the damper is small. Along with the increase of current, the exciting magnetic field is gradually enhanced, the force required by the magnetorheological valve block to move and squeeze the magnetorheological fluid is increased, namely the valve opening pressure of the low-pressure valve block is also increased, the output damping force of the damper is also increased, when the current is increased to a certain extent, the low-pressure valve block 7 cannot flush the magnetorheological valve block 17, namely the magnetorheological valve block 17 closes the low-pressure flow channel 28 at the moment, the magnetorheological valve block 17 is provided with a valve block notch 172, and hydraulic oil flows through the valve block notch 172 when flowing through the valve block notch 172.
In this embodiment, the iron core assembly includes an iron core 11 installed in a piston outer cylinder 21 and an exciting coil 20 wound on the iron core 11, a positioning step for installing the iron core 11 is formed in the piston outer cylinder 21, and an iron core positioning block 111 installed in cooperation with the positioning step is formed to bulge outwards in the radial direction of the outer circumference of the iron core 11. The iron core 11 is formed with iron core locating piece 111 in the circumferencial direction, cooperates the inside location step of piston urceolus to realize location installation, and exciting coil is around locating on the iron core and be used for outwards drawing forth through the opening of seting up on the iron core (exciting coil around establishing and drawing forth and be belonging to prior art, and this is not repeated the description here), is formed with the clearance between iron core 11 and the piston urceolus 21 for hydraulic oil reciprocating flow.
In this embodiment, the whole piston outer cylinder 21 is a drum-shaped structure with small ends and large middle parts, a positioning sleeve 9 matched with the inner iron core for positioning and mounting is arranged in the piston outer cylinder 21, and the piston end cover is matched with the piston outer cylinder 21 for fixed mounting and is abutted against the iron core 11 through the positioning sleeve 9. The outer surface of the outer cylinder 21 of the piston outer cylinder is of a drum-shaped structure as a whole, so that a small gap between the piston and the inner wall of the cylinder 26 is ensured, and leakage amount generated in the process of the damper movement is small enough to be negligible, so that the use of a sealing element is omitted.
In this embodiment, the valve plate assemblies are installed at two ends of the piston outer cylinder 21, the diameter of the low-pressure valve plate 7 is larger than that of the high-pressure valve plate 24, the unidirectional flow passage 27 and the low-pressure flow passage 28 are formed on the same circumference of the piston end cover, and the formed diameter of the piston end cover 6 where the high-pressure flow passage 29 is located is smaller than that of the piston end cover 6 where the low-pressure flow passage 28 is located. Valve plate assemblies are mounted at the left end and the right end of the piston outer cylinder 21, so that different circulation loops can be formed conveniently, and as shown in fig. 3, corresponding valve plate holes are formed in the three valve plates and are used for being matched with different flow passages formed in the piston end cover 6.
In this embodiment, the magnetorheological fluid plug 23 is disposed on the rubber bladder 10, the valve block convex balls 171 are multiple and the valve block convex balls 171 are uniformly distributed on the magnetorheological valve block 17, and the valve block convex balls are abutted against the low-pressure valve block and do not contact with the high-pressure valve block. Preferably, three valve plate convex balls 171 are arranged and all abut against the low-pressure valve plate 7 and are not contacted with the high-pressure valve plate 24, so that the valve plate convex balls only control the opening or closing of the low-pressure valve plate. The outer circular surface of the magneto-rheological valve plate is contacted with the inner wall of the piston outer cylinder to play a supporting and guiding role. The magneto-rheological valve plate gap 172 is used for circulation of hydraulic oil.
In this embodiment, a floating piston 2 is installed between the cylinder bottom 1 and the piston head mechanism. The floating piston 2 is provided with the sealing groove for installing the sealing element, so that the sealing performance is ensured, the floating piston 2 is used for carrying out volume compensation in the working process of the damper, the compensation structure can ensure that the magnetorheological damper has no damping force value mutation at the compression and recovery turning points, the stable transition is realized, and the equipment operation is more stable.
When the damper piston rod moves rightwards, the pressure of a restoring cavity (namely, a cavity between the piston head mechanism and the cylinder end cover 13) is increased, the low-pressure valve plate in the right valve plate assembly of the piston head mechanism is elastically deformed under the action of high-pressure hydraulic oil, the low-pressure flow passage 28 is opened into the piston assembly, the one-way valve plate is in a closed state under the action of hydraulic pressure (when exciting coil current is smaller, hydraulic oil flows through the low-pressure flow passage 28, when exciting coil current is large enough, the low-pressure valve plate is too large to be opened by the acting force from the magnetorheological valve plate, so that the high-pressure valve plate is elastically deformed, the high-pressure flow passage 29 is opened, hydraulic oil does not flow through the low-pressure flow passage, the flowing route of hydraulic oil is controlled by the size of exciting coil current), and the hydraulic oil reaches the left valve plate assembly along a gap between the outer surface of the iron core and the inner wall of the piston outer cylinder (at the moment, the high-pressure flow passage and the low-pressure flow passage in the left valve plate in the left valve mechanism are in a closed state), and then flows through the left one-way flow passage and pushes open the one-way valve plate in the left valve plate mechanism to enter the compression cavity (namely, the cavity between the piston head mechanism and the floating piston 2). When the damper piston rod moves to the left, the operating situation is now the opposite to the situation described above.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (9)
1. A built-in magneto-rheological valve type damper is characterized in that: the cylinder comprises a cylinder barrel, a piston head mechanism, a cylinder barrel end cover and a piston rod, wherein the cylinder barrel is matched with a cylinder bottom, the piston head mechanism can slide back and forth along the axis direction of the cylinder barrel, the cylinder barrel end cover is arranged at the right end of the cylinder barrel, and the piston rod is penetrated through the cylinder barrel end cover and matched with the piston head mechanism to be connected and arranged; the piston head mechanism comprises a piston outer cylinder which can be slidably arranged in the cylinder barrel, an iron core assembly which is arranged in the piston outer cylinder, a valve plate assembly which is arranged at the end part of the piston outer cylinder and a rubber bag assembly which is arranged in the piston outer cylinder and is used for being matched with the valve plate assembly, and the valve plate assembly is used for controlling hydraulic oil in the cylinder barrel to flow and forming different circulating oil paths.
2. The built-in magnetorheological valve damper of claim 1, wherein: the valve block subassembly includes cooperation piston urceolus fixed mounting's piston end cover, installs the check valve block on the piston end cover, laminating piston end cover installation low pressure valve block and high pressure valve block, the low pressure valve block is arranged between check valve block and high pressure valve block, be provided with the one-way runner that the cooperation check valve block used on the piston end cover, the low pressure runner that the cooperation low pressure valve block used and the high pressure runner that the cooperation high pressure valve block used, check valve block, low pressure valve block and high pressure valve block are all through retaining member fixed mounting on the piston end cover.
3. The built-in magnetorheological valve damper of claim 2, wherein: the rubber bag component comprises a rubber bag, a rubber bag fixing plate, a magnetorheological valve sheet and a valve sheet fixing plate, wherein the rubber bag fixing plate is arranged in the rubber bag and matched with the iron core component to be fixedly installed, the magnetorheological valve sheet is installed on the surface of the rubber bag, the valve sheet fixing plate is arranged in the rubber bag and matched with the magnetorheological valve sheet to be fixedly installed, and magnetorheological fluid matched with the iron core component to be used is filled in the rubber bag.
4. A built-in magnetorheological valve damper according to claim 3, wherein: the magnetorheological valve block is outwards protruded along the axial direction to form a valve block convex ball matched with the low-pressure valve block, the valve block convex ball is propped against the surface of the low-pressure valve block, and the rubber bag is matched with the valve block convex ball of the magnetorheological valve block to apply elastic pretightening force to the low-pressure valve block.
5. The built-in magnetorheological valve damper of claim 4, wherein: the iron core assembly comprises an iron core arranged in the outer piston cylinder and an excitation coil wound on the iron core, a positioning step used for installing the iron core is formed in the outer piston cylinder, and an iron core positioning block matched with the positioning step is formed on the outer circumference of the iron core in an outward protruding mode along the radial direction.
6. The built-in magnetorheological valve damper of claim 5, wherein: the piston outer cylinder is integrally of a drum-shaped structure with small two ends and large middle part, a positioning sleeve matched with the inner iron core for positioning and mounting is arranged in the piston outer cylinder, and the piston end cover is matched with the piston outer cylinder for fixed mounting and compresses the iron core through the positioning sleeve.
7. The built-in magnetorheological valve damper of claim 2, wherein: the valve plate assemblies are arranged at two ends of the piston outer cylinder, the diameter of the low-pressure valve plate is larger than that of the high-pressure valve plate, the unidirectional flow passage and the low-pressure flow passage are arranged on the same circumference of the piston end cover, and the diameter of the piston end cover where the high-pressure flow passage is arranged is smaller than that of the piston end cover where the low-pressure flow passage is arranged.
8. The built-in magnetorheological valve damper of claim 4, wherein: the rubber capsule is provided with a magnetorheological fluid plug, the valve block convex balls are a plurality of and uniformly distributed on the magnetorheological valve block, and the valve block convex balls are abutted against the low-pressure valve block and are not contacted with the high-pressure valve block.
9. The built-in magnetorheological valve damper of claim 1, wherein: a floating piston is mounted between the cylinder bottom and the piston head mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310967713.4A CN117028473A (en) | 2023-07-31 | 2023-07-31 | Built-in magneto-rheological valve type damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310967713.4A CN117028473A (en) | 2023-07-31 | 2023-07-31 | Built-in magneto-rheological valve type damper |
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| CN117028473A true CN117028473A (en) | 2023-11-10 |
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| CN202310967713.4A Pending CN117028473A (en) | 2023-07-31 | 2023-07-31 | Built-in magneto-rheological valve type damper |
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| Country | Link |
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| CN (1) | CN117028473A (en) |
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