Hydraulic damper

FIELD: machine building.

SUBSTANCE: hydraulic damper consists of a working cylinder coupled with a housing via rolling bodies. A piston is made from magnetic material. A magnetic ring rigidly fixed on the housing is in contact with the piston through an air gap. A splined pin made from resilient material is mounted inside the working cylinder. The splined pin is interconnected with mating splines of the piston. The piston is equipped with vertical throttle channels. The channels pass into L-shaped channels on the end face surfaces. The outlet holes of the channels adjoin plates with a gap. The plates are rigidly fixed on the piston.

EFFECT: change of damping characteristics.

1 dwg

 



 

Same patents:

FIELD: transport.

SUBSTANCE: proposed damper comprises body, cylinder, rod with piston and extra piston to divide said cylinder to three chambers. Different-stiffness spring is fitted in every said chamber. Said chambers are communicated by pipelines via controlled throttles and solenoid valves. Pipeline is connected with feed main and discharge line. Throttles and valves are controlled by control unit in response to signals fed by the driver.

EFFECT: wider adjustment band, simplified design.

3 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: hydraulic shock absorber comprises a reservoir with an operating cylinder filled with a working fluid. Inside the cylinder there is a piston installed movably with valves. The piston is rigidly fixed on the stem interconnected with the protective jacket. The working cylinder and the protective jacket are made of diamagnetic material. The protective jacket contacts with its inner circular surface with the responsive surface of the working cylinder via a row of revolution solids. In the space between rows of solids of revolutions inside the specified protective jacket there is a ring rigidly fixed, made of a permanent magnet. The ring interacts with its magnetic field via an air gap and a wall of a working cylinder with a cylindrical circular generatrix surface of a magnetoconductive piston of a shock absorber.

EFFECT: increased reliability and simplified design of hydraulic shock absorbers.

3 dwg

FIELD: machine building.

SUBSTANCE: shock-absorbing device consists of an operating cylinder, in which two dividing pistons forming three operating chambers are located. There is one spring in each chamber. A nut of the operating cylinder, through which a stock passes, is screwed on both ends of the operating cylinder. One side of the stock is attached to the dividing piston to transfer forces to it, and its other side is provided with an eye lug for attachment to a car frame and a suspended lever. A stock cuff is installed between the stock and the nut of the operating cylinder. A high pressure pipeline, in which systems of compression and rebound valves and adjustable throttles are located, is provided from the upper operating chamber to the lower operating chamber. There is a branch between two adjustable throttles, which leads to the intermediate operating chamber. One more high pressure pipeline for supply of working liquid is connected to the upper and lower operating chambers, on each of which one control valve and one check valve is installed. One more pipeline is connected to the intermediate operating chamber for discharge of working liquid, on which a control valve and a check valve is installed as well.

EFFECT: wide range of change of elastic damping characteristics of the shock-absorbing device.

1 dwg

Damper // 2426921

FIELD: machine building.

SUBSTANCE: damper consists of cylinder 1 and of rod 2 with piston 3 installed in cylinder. Throttle 12 is installed in piston 3 and communicates above-piston 4 and sub-piston 5 cavities between them. The damper is equipped with safety valves of compression strokes 13 and rebound stroke 14 set in piston 3. Compensation chamber 15 is located in a lower part of cylinder 1. Inside upper ring 17 there is made groove 20 communicated with over-piston cavity 4 through back valve 8. Inside lower ring 18 there is made groove 21 communicated with sub-piston cavity 5 through back valve 9. Inside middle ring 19 there are made upper 22 and lower 23 grooves. Upper groove 22 of middle ring 19 is communicated with over-piston cavity 4 through orifices 6 in the middle part of cylinder 1 and is connected with groove 21 of lower ring 18 by means of left hydraulic valve 24. Lower groove 23 of middle ring 19 is communicated with sub-piston cavity 20 of upper ring 17 by means of right hydraulic valve 25.

EFFECT: simplified design and reduced dimensions and weight of damper at simultaneous raise of its vibro-protecting properties and reliability of operation.

3 dwg

Hydraulic damper // 2413887

FIELD: machine building.

SUBSTANCE: inside cylinder tube and hydraulic damper there are arranged inter-communicating piston cavity and controlled cavity. Both cavities are filled with oil in a pressurised state. Additionally, there is installed a piston travelling in axial direction in the piston cavity and a rod connected to the piston. A flexible element is installed in the control cavity in a position forming a reservoir in the control cavity by means of compression of oil with pressurising force; impact effect is damped so, that the flexible element is forced to elongate and contract when oil flows in/out of the reservoir due to travels of the rod.

EFFECT: simplicity and reduced dimension of design of hydraulic damper, retaining constant amount of oil in piston cavity.

10 cl, 3 dwg

Damper // 2408804

FIELD: machine building.

SUBSTANCE: damper consists of cylinder chamber filled with fluid, of piston installed inside cylinder chamber, of rod connected to piston and of accumulator. The accumulator facilitates generation of damping force produced by the piston rod due to fluid flow from the side of compression in the cylinder chamber. One coil of spiral damping groove is formed on internal periphery of the cylinder chamber within the ranges of piston stroke. Width of the damping groove is constant along its whole length. Depth of the damping groove is gradually diminishes along the spiral in the direction whereto the piston rod is pushed out. The length of the piston along axial line is less, than pitch of the damping groove.

EFFECT: simplified design and more efficient control of damping force of damper.

6 cl, 7 dwg

FIELD: machine building.

SUBSTANCE: tuning to required damping frequency is performed. Dynamic rigidity or transfer factor dip is experimentally determined at first breadboard specimen. Then on increasing damper slit width, tuning frequency is increased along with increasing damping. Thereafter, tuning frequency is decreased by decreasing damper slit width. Aforesaid reduction is performed by increasing the number of slit pairs. Proposed device comprises interconnected pendulums pivoted to protected object. Each pendulum comprises weight suspended to aforesaid object. One object is located above the points of attachment of its suspension to the object, the others being located below aforesaid points. Tight cylindrical barrel is covered with cap and filled with hydraulic fluid. Movable modular hollow piston is arranged inside aforesaid cylindrical barrel fixed between two cylindrical springs. There is a system of channels inside aforesaid piston. It consists of top and bottom covers and uneven number of round plates. Aforesaid slits are formed by flat round rings arranged between aforesaid covers and plates. Former and latter comprise central bores, while even plates have peripheral orifices arranged nearby inner cylindrical surfaces of round rings.

EFFECT: higher efficiency.

2 cl, 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: single-pipe shock absorber comprises housing (1), piping hollow rod (3) with unmovable piston (5) that separates hydraulic space (A) into two compartments. Space (B) in the rod is connected with the hydraulic space through openings (7). The rod space receives flexible hollow balls (6) made of a flexible synthetic material. The shank of the rod is provided with screw (4) that bears balls to exclude cavitation at high speed of the working piston.

EFFECT: enhanced reliability.

1 dwg

Hydraulic damper // 2234013
The invention relates to the field of mechanical engineering

Hydraulic damper // 2551866

FIELD: machine building.

SUBSTANCE: hydraulic damper consists of a working cylinder coupled with a housing via rolling bodies. A piston is made from a magnetic material. A magnetic ring rigidly fixed on the housing is in contact with the piston through an air gap. Two splined pins made from resilient materials are mounted inside the working cylinder coaxially. The splined pins are interconnected with mating splines of the piston halves. Each of the piston halves is spring-loaded in respect to the working cylinder and is fitted with vertical throttle channels. The channels pass into L-shaped channels on the outer surfaces. The outlet holes of the channels adjoin plates with a gap. The plates are rigidly fixed on the piston halves.

EFFECT: change of damping characteristics.

3 dwg

FIELD: machine building.

SUBSTANCE: controlled magneto-liquid shock absorber contains a casing with magnetic liquid, in which a rod with piston is installed, magnetizing coil installed in the enclosure. Poles out of the ferromagnetic material are arranged in the enclosure outside the casing, on them the magnetizing coils are installed. The piston contains alternating plates made out of the material with high magnetic conductance, and plates made out of the material with low magnetic conductance. The piston plates are oriented along the poles axis. In the plates out of the material with high magnetic conductance the throttle channels are made.

EFFECT: increased range of power characteristic of the magneto-liquid absorber.

1 dwg

Shock absorber // 2537088

FIELD: machine building.

SUBSTANCE: invention refers to the machine building industry. A shock absorber consists of a shell (1) and a puncheon (2), which are connected by a rubber-cord diaphragm (3). Solenoids (4, 5) with a common movable core (7) rigidly fixed on the shell (1) are installed in the puncheon (2). A core (7) consists of two magnetic parts (8) connected to each other by a non-magnetic insert (9). The magnetic parts (8) are equal as to the length to the solenoids (4, 5) and are located at an equal distance between them. Two rows of separators (10) with balls (11) are rigidly fixed on the puncheon (2) and housing (6).

EFFECT: improvement of oscillation and vibration damping efficiency.

2 cl, 1 dwg

FIELD: transport.

SUBSTANCE: control system comprises shock absorber connected with stator with phase windings. Armatures are composed of permanent magnets to reciprocate inside said phase windings. Transfer elements connect phase windings in circuit with consumers and storage battery. Acceleration transducers are mounted at sprung mass and unsprung mass with relative displacement transducer arranged there between. Suspension damping control unit comprises differentiating and integrating links and sprung mass oscillation permissible level setter. Transfer elements between phase windings and storage elements are composed of interconnected rectifiers, power switches, load resistors, reservoir capacitors, step-down-step-up converters, storage battery charge control unit, voltage and current transducers. Suspension damping control unit is connected with power switches of every phase while storage battery charge control unit is connected with step-down-step-up converters of every phase.

EFFECT: control over damping parameters and power transfer to storage battery.

2 dwg

FIELD: machine building.

SUBSTANCE: shock absorber has base (1) and two elastic tight shells (2) arranged in mirror symmetry and with clearance relative to each other. Every elastic tight shell is furnished with the damper composed by electromagnetic motor (8). Fixed inductor is arranged inside case (9) and comprises outer and inner cylindrical magnetic cores (10) and (11), respectively, to carry four windings (12, 13). Moving armature is arranged between said windings and consists of nonmagnetic straps (14) with permanent magnets (15) fitted thereon.

EFFECT: control over shock absorber in with range of displacement, better damping properties.

2 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: invention refers to machine building industry. A shock absorber includes a cylindrical housing with a compensating chamber, which is filled with magnetic liquid. A hollow stock with a piston assembly is arranged in the housing. The piston consists of two parts put one into another, installed with gaps and forming a system of alternating poles. Each part of the piston includes a pole disc with pole pins. The value of gaps between end faces of pole pins and pole discs of opposite parts of the piston is larger by 3-4 times than the value of gaps between pole pins. A magnetising coil is equipped with a sealed non-magnetic cylindrical casing and located in a cavity formed with a stock and pole discs with pole pins. The housing is made from non-magnetic material. The piston is installed in the housing with a gap.

EFFECT: enlarging the range of changes of power characteristic and increasing service life of a shock absorber.

2 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: device includes a housing, working bodies from alloy with shape memory effect and a fixed constant magnet installed on the housing. A movable armature is connected to the housing by means of working bodies. The movable constant magnet is installed on the armature carrying a protected object. Sequences of location of magnet poles in two extreme positions of the armature have different alternation.

EFFECT: improving device functioning stability.

3 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: proposed damper comprises holder 1 and punch 2 interconnected by elastic resilient element 3. Solenoids 4, 5 are arranged coaxially therewith and with each other. Composite core 6 is rigidly connected with holder. Two magnetic parts 7, 8 of said core are arranged at equal distance between solenoid coils in the position of static equilibrium. Nonmagnetic spacer 9 is arranged between solenoid magnetic parts. Solenoid coils are connected to power supply via control units power switches 10. Windings 11, 12 of object displacement transducer arranged inside solenoid coils and aligned therewith are connected to control unit.

EFFECT: higher efficiency of damping and smooth run.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: mount includes support plates, a damper, springs in the form of threads and thread tensioning means. The damper consists of constant magnets. Threads are rigidly fixed on one of the support plates and rigidly attached to another support plate by means of thread tensioning means. Distance between support plates is not less than 0.5 of the distance between constant magnet poles. The magnets fixed on one support plate face with their opposite poles the magnet(s) fixed on the other support plate. The magnets fixed on the support plate in a circumferential direction are equally spaced from each other to the distance of not less than 0.5 of the distance between constant magnet poles. As per the first version, the damper of the mount is formed at least with four magnets. At least three magnets are fixed on one of the support plates in a circumferential direction. On the other support plate there fixed is one constant magnet, the axis of which passes through the centre of circle. As per the second version, the damper of the mount is formed at least with six constant magnets. At least three magnets are fixed on each of the support plates in a circumferential direction. Centres of those circles are located on one axis, and difference of their diameters is at least 1.0 of the distance between poles of constant magnet.

EFFECT: improving vibration damping efficiency of the mount.

2 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: pneumatic magnet suspension consists of rubber cord casing (2) with cover (3) forming main working cavity (4) located in cylinder case (1), of additional reservoir (5) of partition (6) between them with electro-magnetic valve (7) controlled with control system (8). Opposite and in pairs permanent magnets (11, 12) with magnetic poles of one polarity facing each other are arranged inside main working cavity (4) on cover (3) and on partition (6). Stops (9, 10) colliding at a pressure stroke are set on cylinder case (1) and on external surface of additional reservoir (5). When stops (9) of cylinder case (1) contact stops (10) of additional reservoir (5) at the compression stroke, an air gap between magnetic poles of opposite located permanent magnets (11, 12) is within ranges of 0-10 mm.

EFFECT: reduced probability of breakdown due to sharp increase of rigidity characteristics of pneumatic magnet suspension.

3 cl, 2 dwg

Magnetic damper // 2244178

FIELD: .mechanical engineering

SUBSTANCE: magnetic damper has vibration dampers provided with movable magnetic platform. The magnets are secure to the base.

EFFECT: enhanced efficiency.

13 cl, 11 dwg

FIELD: mechanical engineering, in particular, equipment for elimination of spurious vibrations of rotating bodies.

SUBSTANCE: torque vibration damper has casing mounted on rotating shaft and provided with annular cavity to be filled with working fluid, and permanent magnets made in the form of axially magnetized plates radially laid in pairs on cavity bases in opposed relation with respect to one another, with opposite poles facing one another with minimal distance from one another in circumferential direction, said distance exceeding height of cavity. Working fluid is combination of ferromagnetic liquid and high-viscosity liquid immiscible with ferromagnetic liquid.

EFFECT: increased damping effectiveness, simplified construction and reduced power losses in the process of rotation of bodies.

2 dwg

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