Elastomeric shock absorber

FIELD: machine building.

SUBSTANCE: shock absorber consists of hollow body filled with elastomer, of rod and of movable packing of rod. The rod is designed to perform axial movements. The movable packing of the rod is made in form of successively arranged sections separated with circular grooves. Step plungers are installed in the body. The steps of the plungers of smaller diameter are conjugated with the cavity of the body. The steps of the plungers of bigger diameter are conjugated with circular grooves separating the sections of the movable packing of the rod.

EFFECT: there is achieved increased reliability and increased service life of shock absorber.

5 cl, 3 dwg

 

The invention relates to the field of engineering, in particular can be used in buffers on railway transport.

Known for absorbing device (Patent RU 2078706 C1, 6 F16F 5/00. Absorbing device / Debt V.I.; N. Goryunov. No. 95105306/11; Claimed 1995.05.10)containing double chamber cylinder, the piston and seal. When the device is a pulse pressure of the working environment, resulting in cavities of the cylinder, acting directly on the movable stem seal, which leads to their rapid deterioration and reduce the reliability and life of the device.

The closest in technical essence is elastomeric shock absorber (Patent RU 2150620 C1, 7 F16F 5/00. Elastomeric shock absorber / Andrzej Chmielewski and D.R. (PL) No. 98103295/28; Claimed 1998.02.26; Published 2000.06.10), containing a hollow body filled with elastomer, the piston and movable stem seal. When the device is a pulse pressure of the elastomer, resulting in the housing cavity during compression of shock absorber, acting directly on the movable stem seal, which leads to its rapid deterioration and reduce the reliability and life of the shock absorber.

The claimed invention is directed to improving the reliability and increase the service life of the shock absorber by reducing the loads acting on the movable stem seal and stem.

The decision of the post which certain tasks can be accomplished by in the absorber, containing a hollow body filled with elastomer, a rod mounted for axial movement, and a movable rod seal, movable stem seal made in the form of consecutive sections, separated by annular grooves, and installed in the housing stepped plungers, and stage plungers smaller diameter communicated with the cavity of the body, and the step of larger diameter are communicated with the annular grooves separating section movable stem seal. Stepped plungers supplied with springs. The plungers are made integral so that the axis of the stages can be shifted relative to each other. Case in areas adjacent to the speed of the plungers, equipped with cameras, filled with elastomer. The camera is highly compressible, for example, gas-filled, elastic elements.

The shock absorber shown in figure 1, figure 2 shows the extension element And with figure 1, figure 3 shows the extension element B of figure 2, where 1 is the case with lid; 2 - stem; 3, 4 and 5 - section movable stem seal; 6 and 7 - speed plungers; 8 and 9 - springs 10 - camera; 11 - elastic elements; 12 - cavity of the body.

The rod 2 is installed in the housing 1 with the possibility of axial movement. In the front cover 1 is installed sections 3, 4 and 5 of the rolling rod seals. Stepped plungers 6 and 7 ll is the Plac CE with the possibility of axial movement in both directions in the front cover 1 and are held in high positions by the springs 8 and 9. Stage of smaller diameter stepped plungers 6 and 7 are communicated with the cavity 12 of the housing 1. A stepped plunger 6 has a smaller diameter greater degree to the diameter of the lower stage, and the step of larger diameter communicates with the groove separating sections 3 and 4 of the rolling rod seals. The step of larger diameter of the stepped plunger 7 having a greater ratio of diameters, communicates with the groove separating sections 4 and 5 of the rolling rod seals. To enable the self-speed of the plungers 6 and 7 in the holes of the housing 1, the plungers 6 and 7 are sectional. In the areas of housing 1 adjacent to the joints of the speed of the plungers 6 and 7, the camera 10 equipped with a highly compressible elastic elements 11.

When the shock absorber rod 2 moves, compressing the elastomer into the cavity 12 of the housing 1. Increasing the pressure of the elastomer affects the speed of the smaller diameter of the plungers 6 and 7 and section 3 of the rolling rod seals. Elastic deformation sections 3 and 4 of the rolling rod seals, and possible leakage of the elastomer through sections 3 and 4 of the rolling rod seals lead to compression of the elastomer in the grooves separating the sections 3, 4 and 5 of the rolling rod seals. Because the grooves are communicated with steps larger diameter plungers 6 and 7, and the plungers 6 and 7 are axial p is motion in both directions, the grooves will be pressure, defined as a fraction of the pressure in the cavity 12 mainly by the ratio of the squares of the degrees of communicating with them plungers. The influence of the springs 8 and 9 at pressures of hundreds of megapascals in the elastomeric shock absorbers, shocks, is peripheral. Impact forces in place of the joints of the speed of the plungers 6 and 7 also small, because the relative change of the volume chambers 10, caused by the displacement of the plungers 6 and 7, is negligible. In addition, the volume change of the camera 10 does not result in a significant change in the pressure due to the presence in them of a highly compressible elastic elements 11. When you return the rod 2 in its initial position, the pressure in the cavity of the housing 1 is reduced to the charger, and manual plungers 6 and 7 under the action of the springs 8 and 9 seek to return to the middle position. Because during the double stroke of the piston rod 2, the elastomer due to leakage through the partition seals 3 and 4 and the gaps in the planting stepped plungers 6 and 7 is redistributed between the cavities, the return speed of the plungers 6 and 7 in the middle position occurs gradually restore the original distribution of the elastomer. Since the restoration of the original distribution of the elastomer is significantly slower than its violation, to ensure the normal operation of the shock absorber necessary power reserve of plunge the s 6 and 7, sufficient for the perception of pressure when several double moves rod 2 (strikes).

In the proposed absorber pressure pulses that occur within the body when the shock is distributed between the sections 3, 4 and 5 of the rolling seal rod 2 in increments of pressure in the cavity of the housing 1, defined by the ratio of the squares of the degrees of the respective plungers. The selection of the ratio between the squares of the degrees of the plungers 6 and 7 can, for example, to unload the outer section of the seal 5, which determines the leakage of the elastomer shock absorber, and the remainder of the pressure evenly between the other sections.

1. The elastomeric shock absorber, containing a hollow body filled with elastomer, a rod mounted for axial movement, and a movable rod seal, characterized in that the movable rod seal made in the form of consecutive sections, separated by annular grooves, and installed in the housing stepped plungers, and stage plungers smaller diameter communicated with the cavity of the housing, and level of plungers larger diameter communicate with annular grooves separating section movable stem seal.

2. The shock absorber according to claim 1, characterized in that the stepped plungers provided with a spring.

3. The shock absorber according to claim 1, characterized in that the plungers made ostalnymi thus, that the axis of the stages can be shifted relative to each other.

4. The shock absorber according to claim 1, characterized in that the housing areas adjacent to the joints of the speed of the plungers, equipped with cameras, filled with elastomer.

5. The shock absorber according to claim 4, characterized in that the camera is highly compressible, for example, gas-filled, elastic elements.



 

Same patents:

FIELD: mechanical engineering.

SUBSTANCE: shock-absorber comprises hollow housing that is provided with lids and filled with elastomer, rod, movable seal for the rod, and baffle with ports for the rod . The baffle separates the housing space from the shock absorbing chamber arranged in the vicinity of the seal. The baffle port and appropriate section of the rod are step-wise and define a compression chamber. The rod is provided with the passage that connects the shock absorbing chamber, compression chamber, and the space of the hosing. The check valve is mounted in the passage section interposed between the compression chamber and housing space.

EFFECT: enhanced reliability and prolonged service life.

1 cl, 1 dwg

The invention relates to shock absorbers and can find application in many fields of engineering, where necessary to protect structures from the effects of intense shock and dynamic loads and, in particular, as the energy-absorbing elements, ensure the connection of the bumper cars

Damping device // 2179271
The invention relates to mechanical engineering and for the creation of damping devices for protecting electronic equipment from seismogenic effects of high amplitude and duration, transmitted through the base in the horizontal and vertical planes

Elastic damper // 2156899
The invention relates to the field of mechanical engineering

The invention relates to shock absorbers, the principle of which is based on the use of a combination of elastic and plastic deformation of the material, and can find application in many fields of engineering, where necessary to protect structures from the effects of intense shock and dynamic loads, in particular, as the energy-absorbing means mounting bumper car

The shock absorber // 2057974

The absorber pipe // 2040717

FIELD: machine building.

SUBSTANCE: invention refers to the sphere of machine building immediately dealing with design of devices providing for absorption of vibrations generated in the course of power units operation. The hydraulic mounting support is composed of a pot (1) with a lid (2). Between the pot and the lid, attached to the former and to the latter with the help of threaded fasteners (13) there is a deflector positioned (4) consisting of plates (5, 6). In the plates there is a throttle channel (7) arranged that connects the fluid-containing cavities (8 and 9) positioned opposite sides of the deflector (4) between the diaphragms (10 and 11). A rod (18) is connected to the diaphragm (11) and the diaphragm seat. Both sides of the pot (1) bottom there are O-ring resilient elements mounted (16 and 17) fabricated of a polymer material. The resilient elements encircle the rod (18) between the diaphragm (11) seat and the nut (22) screwed onto the rod.

EFFECT: enhanced reliability and adaptability of the hydraulic mounting support as manufactured on a small-batch basis for equipment of specialised-purpose vehicles.

4 cl, 2 dwg

FIELD: transportation.

SUBSTANCE: pneumatic suspension comprises rubber-cord casing with cover forming work space, additional capacity located between them and baffle with valve unit. Valve unit includes cylinder installed along suspension axis, radial bypass holes, piston and rod fitted in cover. Valve unit is made in the form of damping unit self-regulating by amplitude and direction of vibrations. In valve unit body the cylinder with piston is installed forming circular cavity together with body. Circular cavity is connected with additional capacity space and with rubber-cord casing space via radial bypass holes closed by flexible elements attached to outer surface of body. Circular cavity is also connected with cylinder space via radial channels made in the centre part of cylinder at distance equal to piston height. Piston is connected with rod made as resilient core and forms together with cylinder the over-piston space communicating with rubber-cord casing space and under-piston space communicating with additional capacity space.

EFFECT: improvement of vehicle soft riding over roads of any types, operation reliability improvement, reduction of energy losses and suspension heating.

2 dwg

Hydraulic damper // 2339856

FIELD: transportation.

SUBSTANCE: hydraulic damper comprises operating cylinder and installed in it movably piston with valves. Piston and a pair of ring-shaped retainers are rigidly fixed on rod. In the space between retainers the piston spring-loaded from two butt-ends by compression springs is movably fitted on cotter. The piston is provided with vertical channels going into horizontal position. Channels contact with varying in width vertical recessions. Recessions are made on circumferential generatix of rod surface and are interconnected with horizontal sections of vertical channels which are located in the rod and then go into horizontal sections. Longitudinal axes of the latter are positioned above ring-shaped retainers in over-piston and under-piston chambers of operating cylinder.

EFFECT: design simplification and enhancement of usage efficiency.

3 dwg

FIELD: machine building.

SUBSTANCE: hydro-pneumatic flexible element incorporates the main cylinder with a piston and a con-rod and the additional cylinder. The main cylinder head end accommodates a pneumatic chamber, while the rod end has a hydraulic chamber. The additional cylinder is arranged in a barrel and filled with fluid. The main cylinder con-rod free end is furnished, in the hydraulic chamber, with and end face piston. The two-wall additional cylinder inner wall is furnished with a channel, the said inner wall end being provided with an additional piston. At that the aforesaid barrel is fitted with a servo element designed to interact with the additional cylinder inner wall.

EFFECT: reduced impact loads on bearing structure, high anti-vibration strength, automatic adjustment of rigidity in response to impact loads, automatic adjustment of flexible element length, simple design and ease of manufacture.

3 cl, 10 dwg

FIELD: transportation.

SUBSTANCE: facility for transport vehicle antihunting contains absorber, outfitted by piston, separating its internal part for top and bottom interstices. There are additionally implemented two passages in absorber. Top passage connects top interstice of absorber with main line, which is connected to the first electromagnetic valve, and with main line, connected to control unit and to sliding valve thought the passage, implemented in sliding valve body. The first electromagnetic valve is connected to main line which is connected to sliding valve thought the passage, implemented in sliding valve body. Bottom passage connects bottom absorber interstice with main line which is connected to the second electromagnetic valve and with main line connected to the control unit and sliding valve thought the passage, implemented in sliding valve body. The second electromagnetic valve is connected to main line which is connected to sliding valve thought the passage implemented in sliding valve body. Sliding valve is outfitted by plunger located in midposition due to springs and by floating electromagnet geared by control unit. It is a main line which connects two passages implemented in sliding valve body with input to hydraulic motor. Also it is a main line connecting two passages implemented in sliding valve body with hydraulic motor output. Hydraulic motor is drive of peripherals.

EFFECT: fuel consumption and heating of damping fluid reduction and improving of free draft force at movement of vehicle on irregularity.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to hydraulic shock-absorbing struts, particularly, to the strut adjustment devices, primarily to such devices that allow stabilising the automotive suspension shock struts at ambient temperature varying from +40°C to -40°C irrespective of the used oil type. The hydraulic shock-absorber incorporates a hydraulic cylinder with drain ports communicating the piston and rod spaces, a rod, a drain port spring and drain port plate with one or several holes for oil to pass through. A part of one or several holes is constantly above the drain port or piston holes. The drain port twisted spring one end is rigidly attached to the plate, its second end being coupled with the rod. The said plate can rotate driven by the spring when the length of the latter varies at temperature variation. The said spring can be cylindrical connected to the plate via a sleeve rigidly linked with the plate and spring. Invention can be used, for example, in the VAZ-type car front suspension shock strut.

EFFECT: hydraulic shock strut featuring constant performances at whatever ambient temperature irrespective of the used oil type.

2 cl, 2 dwg

Damper // 2327067

FIELD: mechanics.

SUBSTANCE: invention relates to devices designed to reduce vibration and shock effects, and may be used in designing anti-vibration and anti-shock protection of whatever engineering systems and structures. The damper incorporates a rod, damping elements and plates. The rod is a multi-layer design, the layers featuring different acoustic susceptibility. Every layer is fabricated as a thin-wall cylinder supported by a leg and having a thread made on the cylinder inner surface and the leg outer surface. The damper is provided with tight casing filled with a liquid and fitted on the rod. The damping elements are made in the form of split plates forming the petals, every petal featuring a different intrinsic frequency of elastic oscillations. Higher rigidity of coupling is provided.

EFFECT: higher rigidity of couplings.

2 cl, 3 dwg

Damper // 2324090

FIELD: engineering industry.

SUBSTANCE: damper consists of working cylinder in which two-piece piston is placed. Piston parts are rigidly fixed on hollow and continuous rods, accordingly ring and continuous round section, and supplied by channels for pass on them a hydraulic fluid. Both parts of the piston are executed in the form of sleeves, supplied trimmed among themselves by the pair radially located partitions, and rigidly fixed on a hollow rod of ring section. In internal space of sleeves between their radial partitions the mobile lobe is placed. It rigidly connected to a rod of continuous round section. Throttle channels of various diameters are executed in the bottoms of sleeves.

EFFECT: increasing of damping abilities of a damper is reached.

6 dwg

Hydraulic damper // 2324089

FIELD: engineering industry.

SUBSTANCE: hydraulic damper consists of working cylinder in which two-piece piston is movably placed. Piston parts are rigidly fixed on hollow and continuous rods of ring and continuous round section, and supplied by channels for hydraulic fluid transiting. In the lower part of a continuous rod the channel is executed. This channel is linked, at least with two open coaxial holes located in its diametrical plane. Walls of a hollow rod lay in a horizontal plane of these holes, and are supplied with open slots varying on height of rods. Each of slots is directed on an external and internal generatrix of a hollow rod to each other by the ends having their least height.

EFFECT: operational efficiency upgrading of a damper due to improvement of its damping performances.

2 dwg

FIELD: engineering industry.

SUBSTANCE: suppressor of oscillations, mainly of rail crews, consists of working cylinder in which the piston is movably placed. Piston consists of two parts fixed on hollow and continuous rods of ring and round section. Piston parts are supplied on the surfaces by radial edges and protuberances with the channels bent under a right angle. Radial edges are movably placed in a vertical plane of a suppressor in corresponding slots. Slots are executed on external surfaces of each of piston parts. Edges are spring-bias concerning slots by springs of the compression having various magnitude of linear rigidity. The maximum course of edges is equal to height of the protuberances supplied with channels bent under a right angle.

EFFECT: operation possibilities increasing of hydraulic suppressors of oscillations.

2 dwg

Hydraulic damper // 2247269

FIELD: mechanical engineering.

SUBSTANCE: hydraulic damper comprises piston provided with axial passages and working cylinder filled with fluid. The piston is connected with the rod. The inner side of the cylinder and outer side of the cylinder, which is in a contact with the piston side, are provided with thread. The piston is mounted on the rod for permitting rotation around the rod. The piston is provided with radial passages whose longitudinal axes intersect with the longitudinal axes of the axial passages of the piston. The diameters of the axial passages decrease from the longitudinal axis of symmetry of the piston to its periphery. The radial passages receive movable spring-loaded slide valves whose diameters exceed these of axial passages of the piston.

EFFECT: expanded functional capabilities.

3 dwg

Up!