Single-action shock-absorber with controlled power consumption
FIELD: machine building.
SUBSTANCE: shock-absorber contains a housing and energy absorbing element with cutters. The housing is designed as a notched wheel with radial slots in which "П"-shaped cutters with preset width of a slot are fixed. On a pawl which axis is fixed outside of the notched wheel, on the base of the shock-absorber housing there installed is a micro switch of the notched wheel tooth touching by the pawl fixation. The notched wheel axis is connected to the shaft of step motor. Energy absorbing element is designed as a metal plate with constant width passing through the slot of "П"-shaped cutter.
EFFECT: improving accuracy of shock absorber power consumption control.
The invention relates to a device for damping the kinetic energy of a moving object and can be used to secure the lower shock load when landing seat with the pilot to the value transferred by the pilot.
Known shock absorber, comprising a housing and an energy-absorbing element with cutters (copyright certificate №989197 priority 02.07.1981 year).
The disadvantage of the shock absorber is that it has poor accuracy of controlling the intensity of the shock absorber due to the error of moving cutters and possible operator error during manual tuning of the shock absorber on the various efforts required for individual reduce congestion for pilots with different body mass.
The objective of the invention is to improve the accuracy of controlling the intensity of the shock absorber.
The problem is solved by the absorber represented by the figures 1, 2, 3, 4.
Figure 1 represents the installation of the shock absorber on a chair with a man.
Figure 2 is a General view of the shock absorber.
Figure 3 presents a diagram of the operation of the shock absorber.
Figure 4 represents the diagram of the system configuration of the shock absorber to the desired intensity.
The proposed absorber consists of a ratchet wheel 1 with radial grooves, the U-shaped incisors 2 with a predetermined width of the groove, mounted in a radial groove of the ratchet wheel, dogs 3, the axis of which is fixed outside of the ratchet wheel at the base of the shock absorber, the microswitch 4 fixation touch the dog tooth ratchet wheel mounted on the pawl 3, the stepper motor 5. The shock absorber is mounted on the seat 6. Energy-absorbing element 7, made in the form of a metal plate of constant width, held in the grooves of the U-shaped incisors 2, is fixed on the housing of the cabin 8. The number of the U-shaped incisors corresponds to the number of adjustment ranges of the intensity of the shock absorber. In figure 2 the number of cutters is 5, which corresponds to their use in the mass range of pilots from 50 to 120 kg Width of the groove is a U-shaped cutter is selected so that the chip thickness corresponded to the desired intensity.
To control the movement of the cutters used stepper motor 5 and the control unit 9, which sets the required number of steps and the angle of rotation of the ratchet wheel, and thereby setting the desired cutting tool in a working position.
Works as a shock absorber as follows.
First is the setting of the shock absorber to the desired energy intensity, which is a function of the mass of the pilot. When the larger mass requires more energy, which is achieved by increasing the thickness of the cutting by the cutter shavings with energy-absorbing element. Tothis remote control 9 of the stepper motor 5 is set to the number of steps of the motor shaft, turning the axis of the ratchet wheel 1 at the angle required for the installation of a U-shaped cutter 2 required width relative to the energy absorbing element 7, thereby the chip thickness. When turning the ratchet wheel 1 dog 3 monitors the teeth of the ratchet wheel, and when the rotation shaft of the stepper motor 5 to the desired angle, the dog falls in required to install a U-shaped cutter with the selected width of the groove in the depression between the teeth, thereby locking the hard setting of the cutter. Due to the existing uncertainty of the stepper motor 5 dog 3 may not reach all the way into the tooth ratchet wheel, and thereby to provide the required precision cutter. The microswitch 4 fixation touch the dog tooth ratchet wheel in this case does not work, and stepper motor 5 continues to rotate the shaft until the actuation of the microswitch 4, after which the stepper motor stops the rotation of the shaft, and thus the rotation of the ratchet wheel 1. The thickness of the cutting by the cutter chips is provided by the difference of the width of the energy-absorbing element 7 and the groove chosen when installing a U-shaped cutter 2.
Due to the presence of a U-shaped cutter with fixed thickness of the chip with energy-absorbing element, providing clearly fixed angle of rotation of the ratchet wheel, and thereby ensure the required installation of the cutter to the energy-absorbing element, exception error device move the cutter through the use of stepper motor significantly increases the accuracy of controlling the intensity of the shock absorber.
After adjustment by the pilot damper is ready for operation. Upon impact of an object on the ground together with the chair and placed it by the pilot, the load is transmitted to the damper casing, which together with the selected cutter moves relative to the energy absorbing element, and the edges of the U-shaped cutter cut chips on the edges of the energy absorbing element, thereby absorbing the energy of the blows.
The absorber unilateral action with adjustable intensity, comprising a housing, an energy-absorbing element with blades, characterized in that the damper casing is made in the form of a ratchet wheel with radial slots in which the fixed U-shaped incisors with a predetermined width of the groove, further introduced the dog, the axis of which is fixed outside of the ratchet wheel at the base of the shock absorber, a microswitch fixing touch the dog tooth ratchet wheel, and the axis of the ratchet wheel connected with the shaft of the stepper motor, and the energy-absorbing element is designed in the form of a metal plate of constant width, passing through the groove of a U-shaped cutter.
SUBSTANCE: invention relates to railway transport. Proposed module consists of casing to be mounted on vehicle and energy damping element with, at least, one bead made on element outer diameter to interact with casing front end. Said bead represents a multifilar helix. Plug-in insert with cutting edge facing said bead is arranged at casing front end. Said energy damping element is secured axially, on one side, jointly with plug-in insert at casing front end and, on the other side, is mounted in moving plate. Plug-in inserts has cutters arranged on cutting edge side extending beyond cutting edge and inner diameter of multifilar helix by magnitude exceeding their design wear. Quantity of cutters, their width and quantity of energy damping elements and their length are defined by design parameters of energy damping.
EFFECT: simplified manufacture, higher efficiency and reliability.
SUBSTANCE: invention relates to railway transport. Proposed module consists of three plates: moving, intermediate and fixed with energy damping elements arranged there between. Fixed plate is jointed with vehicle, moving and intermediate plates are arranged to displace and shear material from said damping elements arranged between moving and intermediate plates and between intermediate and fixed plates. Maximum first damping element shearing force is smaller than that of second damping elements. Damping element sheared surface presents rings with outer multistart spiral and at least two lengthwise grooves. Damping elements are secured, on one side, by bushes with cutting edges, locating bushes, washers with fasteners on intermediate and fixed plates and coupled, on the other side, with moving and intermediate plate to shear preset thickness of material of ring multistart spiral material.
EFFECT: expanded operating performances, simplified design, higher efficiency.
FIELD: engines and pumps.
SUBSTANCE: gas turbine engine fan comprises blades attached to rotor discs and blade feet. Said feet comprises radial flanges secured at rotor disc flanges by means of stud bolts. Stud bolts are fitted into positioning bushes arranged in foot flange holes. Every bush comprises, at least, one deformable part arranged in transverse position between stud bolt fitted in said bush and edge of hole wherein the bush is fitted. Aforesaid deformable part serves to allow turn of blade foot at clash of the blade against foot and absorb a portion of said clash energy. Foot flange attachment bush comprises stiff part and deformable part including two parallel semi-cylinders coupled by deformable webs. Said webs are concaved in one direction. Both said semi-cylinders are arranged on one line with cylindrical ends of said stiff part, in fact, to rest thereon.
EFFECT: sufficient absorption of blade-to-foot clash energy.
15 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: damper comprises hollow twin torsion made from alloy with memory effect. Said torsion is coupled with equipment and pipelines attachment bracket lever. Nuclear power station reactor floor bed accommodates vibration transducer connected with control unit and power supply. Smaller feed pipelines are connected with torsion and filled with heat carrier and communicated with heat and cold heat carrier bypass valves. Bypass valves are communicated via cable lines with control unit. Hot heat carrier bypass valve of the main circulation circuit is communicated via small feed pipeline with nuclear power station reactor outlet circuit. Cold heat carrier bypass valve is communicated with main circulation pump outlet circuit. Temperature transducer thermocouple is secured on torsion, connected with control unit by cable line.
EFFECT: high thermal capacity, efficient damping, reusability.
SUBSTANCE: invention relates to machine building. Proposed damper comprises main plate, force transfer element with clamp, deformable energy absorbing tube with its first end jointed with main plate, and connection element for coupling force transfer element with deformable tube second end. Connection element is coupled by screw joint with structural frame rigidly connected with main plate to press on clamp so that deformable tube is clamped without clearance between said clamp and main plate.
EFFECT: higher reliability in damping impacts.
21 cl, 18 dwg
FIELD: machine building.
SUBSTANCE: proposed damper 1 comprises hollow lengthwise part 2 to be deformed, part 3 coiling backward and attached to the end of aforesaid hollow lengthwise part. In compliance with first version, extending part is connected with coiling back part while hollow lengthwise part 2 is inclined to extending part. In compliance with second version, lengthwise axis of hollow lengthwise part 2 is inclined to lengthwise axis of transport facility. Coiling back part 3 is providing with mount 4. Perpendicular to plane 5 of mount attachment is inclined to lengthwise axis of hollow lengthwise part 2. Transport facility comprising described power damper comprises lining that forms guide surface for hollow lengthwise part 2. Method of fabrication of power damper includes the following operation: varying cross sectional width in some sections of tube from first cross sectional width to second one by forming hollow lengthwise parts with first and second widths, and contracting the tube.
EFFECT: simplified design, higher efficiency of damping.
17 cl, 16 dwg
FIELD: mechanical engineering.
SUBSTANCE: invention refers to the energy absorbing device, as well as its use in the quality of impact force protective device for the main frame of track vehicles or in the quality of impact force protective device for the permanent items of equipment, particularly, buffer stop. The energy absorbing device comprises absorbing element (10) and mating member (20). Provided the exceedance of the impact force, applicable to the energy absorbing device, the mating member (20) and absorbing element (10) are shifted in the direction to each other. Simultaneously absorption of at least some part of impact energy, applied to the energy absorbing device, takes place. The mating member (20) constitutes a hollow body, open from one end and situated adjacent to the absorbing element (10) for the purpose of forming at least one energy absorbing section (11), produced out of composite material with fibre filler. Fragments of energy absorbing section (11), produced out of composite material with fibre filler, may get inside a hollow body.
EFFECT: dissipation of high impact energy and energy absorbing device construction simplification.
24 cl, 5 dwg
SUBSTANCE: jointing brace (10, 10') comprises two elements (20, 21, 20', 21') of the brace, two end thrusts, as well as damping appliances (30, 31, 30') to damp displacement of brace elements (20, 21, 20', 21') for them to reach end thrusts in case particular tolerable displacement is reached. Brace elements (20, 21, 20', 21') are arranged coaxially to displace relative to each in lengthwise direction (L) of jointing brace (10, 10'). Damping appliances (30, 31, 30') are made from material that undergoes plastic deformation in the range of originating loads and het contracted in said direction (L) for damping said displacement. In contraction of damping appliances (30, 31, 30'), their cross section increases radially inward and radially outward in direction perpendicular to direction (L).
EFFECT: simple design and reduced weight.
15 cl, 4 dwg
SUBSTANCE: invention relates to power-absorbing assembly 10 to be used integrated with UIC-buffer or side buffer 100. Said power-absorbing assembly 10 has main plate 2 to joint assembly 10 to support frame or chassis 101 of the main structure and, preferably, to allow its detachment, connection plate 1 whereto UIC buffer 110 may be connected, and protective power-absorbing element 3 to be arranged between main plate 2 and connection plate 1 to thrust there against, and with no play.
EFFECT: reliable dissipation of shock power.
14 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: case of damper is made as cylinder cartridge with cover and bottom. The bottom of the case has a hole for securing a rod. End external surface of the bottom is equipped with a circular relieving groove. The rod is made in form of a cylinder rod whereon there are mounted a cutting section, a deforming element and an additional damping element. The deformed unit interacts with the deforming unit and internal wall of the case. The deformed unit is made in form of a set of coaxially arranged metal washers alternating so, that generatrix of internal surface of the set corresponds to a stepped curvilinear line equidistant to a profile of the deforming unit. The additional damping element is made in form of a cylinder casing enveloping core of the rod. The cylinder casing is equipped with circular flanges and with grooves arranged on its external surface.
EFFECT: increased specific power absorption and raised reliability and efficiency of damper.
4 cl, 4 dwg
FIELD: transport engineering; car protective devices.
SUBSTANCE: invention relates to device aimed at protecting cars in case of collisions, and it can used in form and rear bumpers of cars, microbuses and other vehicles. Buffer is divided into central and side sections, the latter being turned backwards at preset angle, and it includes bumper and energy-absorbing devices connected to bumper and arranged uniformly lengthwise at a distance from each other. Two central energy-absorbing devices of buffer, being mirror reflection of each other, are installed adjoining each other. Each energy-absorbing device includes definite number of adjoining energy-absorbing members, each being mirror reflection of adjacent one, is made integral from cut of round metal rod and it includes base, jumper and brace, all arranged in relatively perpendicular planes. Bases of energy-absorbing members are connected to outer surface of bumper, jumpers of energy-absorbing members are arranged coaxially for interaction with outer surface of bumper. Bases and braces and braces of energy-absorbing members are arranged horizontally, and jumpers, vertically. Each energy-absorbing device is provided with leaf springs and movable base plate, braces of all energy-absorbing devices of left-hand and, accordingly, right-hand halves of buffer are pointed to different sides at preset angle in directions from middle to edges of bumper. Buffer includes outer sheath provided with metal strip sections connected to its inner surface which guarantees regulated destruction of sheath in preset places. Invention provides protection at high energy-absorbing capacity and stability of shock-absorbing characteristics of car at collision with obstacle or other car.
EFFECT: improved protection of cars.
3 cl, 9 dwg
FIELD: transport engineering; car protective devices.
SUBSTANCE: invention relates to devices aimed at protection of cars in case of collisions and it can be used to protect side surfaces of cars, microbuses and other vehicles together with front and rear bumpers. Proposed buffer contains two protective sections arranged at one level with bumpers, each being connected to car body load-carrying members and provided with support surface in form of U-shaped section, and energy-absorbing devices connected to U-shaped section being uniformly arranged over its length at a distance from each other. Each energy-absorbing device includes definite number of adjoining energy-absorbing members, each being mirror reflection of adjacent one, made integral from cut of round metal rod and includes base, jumper and brace located in relatively perpendicular planes. Bases of energy-absorbing members are connected to outer surface of U-shaped section. Jumpers of energy-absorbing members are arranged coaxially and they interact with outer surface of section. Bases and braces of energy-absorbing members are arranged horizontally, and jumpers, vertically. Each energy-absorbing device is furnished with movable base plate made integral with leaf spring. Braces of all energy-absorbing devices of buffer sections are tilted at preset angle, respectively, in direction from front to rear bumper. Each section of buffer includes also foamed shock-absorbing material units placed in spaces between adjacent energy-absorbing devices, and outer sheath connected to bent off parts of U-shaped section and it can be additionally provided with safety strip connected to its outer surface. Invention provides protection of car body side surface at collision with obstacle to other car. It provides high energy-absorbing capacity and stability of shock-absorbing characteristics of car.
EFFECT: improved protection of cars.
3 cl, 7 dwg
FIELD: mechanical engineering.
SUBSTANCE: damper comprises flexible members and bearing plates assembled in a structure with interference. The flexible members are made of a system of flexible half-rings and flexible damper interposed between the bearing plates and clamped with at least one guiding column and threaded joint, which allows the value of interference and rigidity of the damper to be adjusted. The ends of the flexible half-rings abut against the bearing plates. The cylindrical surface of the half-rings faces toward the interior of the damper and abut against the flexible damper.
EFFECT: enhanced damping capabilities.
13 cl, 7 dwg
FIELD: rail vehicles and different industries.
SUBSTANCE: proposed device contains energy absorbing part, movable and stationary support plates. Energy absorbing part can be made up of metal plate members, thickness from 2 to 10 mm, extreme ones being secured on support plates with flat section and camber section and forming cellular structure in section consisting of great number of hexahedrons in section by planes passing through vector of external resultant force with provision of impact energy absorbing owing to flexural strains in metal plate members mainly on chamber sections. Energy absorbing part can contain great number of cells, each formed by two flat metal plates, thickness from 2 to 10 mm, arranged square to external force vector, and two metal plates, thickness from 2 to 10 mm, placed in between, with initial camber in direction square to vector of external force and thrusting against middle of flat metal plates of adjacent cells. Extreme metal plates are secured to support plates with provision of absorption of impact energy owing to flexible strains of metal plates in places of maximum camber and flexural strains of flat metal plates in places of butt-joining of metal plates. Energy absorbing part can be made in form of cellular structure consisting of great number of rectangles made up of metal plate members, thickness from 2 to 10 mm, extreme ones being secured on support plates. Some metal plate members coincide with direction of external force and thrust against middle of metal plate members of adjacent cells arranged square to vector of external force with provision of impact energy absorbing owing to flexural strains in units of intersection of metal plate members. Device provides absorption of impact energy of the order of 0.5-2.5 MJ.
EFFECT: provision of effective absorption if impact energy at relatively uniform overloads to which passengers are subjected.
4 cl, 3 dwg
FIELD: mechanical engineering.
SUBSTANCE: ring damper comprises flexible cylindrical rings secured to the housing. The housing is made of panel whose face grooves receive cylindrical rings fitted with interference so that the projecting parts of the flexible cylindrical rings from both sides of the panel define flexible bearing arcs of the damper which are in a contact with the surfaces of the object to be damped and bearing surfaces of the vehicle or construction structure, or foundation. The heights of the flexible bearing arcs are controlled by means of flexible semirings that are set with interference in the space between the flexible bearing arcs of the flexible cylindrical rings and panel surfaces. The peripheral planks secured to the panel prevent the flexible cylindrical rings and flexible semirings against falling out of the face grooves.
EFFECT: improved and simplified structure and expanded functional capabilities.
15 cl, 12 dwg
FIELD: transport engineering; trucks.
SUBSTANCE: proposed energy-absorbing buffer of truck relates to collision protective means of vehicles and it can be used in front and rear bumpers of trucks, buses and other vehicles of different types. Buffer connected to front of rear bumper is arranged lower than bumper and includes energy-absorbing devices united into sections arranged at a distance from each other. Energy-absorbing devices in each section are butt-joined and connected to each other. Each energy absorbing device consists of two energy-absorbing members, being mirror-like relative to each other, made integral of tubular blank cut and including bases, bridges and main and additional struts located in relatively perpendicular planes. Bases of energy-absorbing members are connected to outer surface of bumper, bridges of energy-absorbing members are arranged coaxially relative to each other, some engaging with outer surface of bumper, and others, with support plate. Each energy-absorbing device is furnished with leaf-springs and members made of elastic material arranged around additional struts which are united in each section by C-shaped section. Invention prevents getting of passenger car under truck frame, thus providing passive safety. It is reusable device featuring high energy-absorbing properties and stability of shock-absorbing characteristics which can be set within wide ranges. It has simple design and reduced aerodynamic drag which provides economy of fuel.
EFFECT: improved safety, reduced aerodynamic drag and fuel consumption.
3 cl, 7 dwg
FIELD: mechanical engineering; seismic protection.
SUBSTANCE: proposed device contains deformable plastic member. Said member is made in form of frame made of channel elements connected, with flanges outwards, with formation of upper and lower support planes furnished with fastening units arranged on opposite sides of each plane. Fastening units are provided with cone-like elements, for instance, cone-like washers adjoining support plane and orientated towards each other by narrow part.
Fastening units of one support plane are displaced relative to fastening units of other plane through 90°.
EFFECT: protection of equipment from seismic shocks of 15-20 g and higher in any direction.
FIELD: transport engineering; automobile protection means.
SUBSTANCE: proposed bumper connected to load-bearing structure of automobile includes two sections arranged at a distance from each other and energy-absorbing device adjoining each other. Each energy-absorbing device consists of two interconnected energy-absorbing members, each being mirror image of the other and made as integral part from cut of round metal bar including base, additional base, near, additional and far bridges interconnected by main and additional braces and located in relatively perpendicular planes. Bases of energy-absorbing members are arranged vertically and connected to support surface, bridges of energy-absorbing members are arranged horizontally coaxially relative to each other, main and additional braces of energy-absorbing members of each section are arranged lower than support surface being inter connected by rigid plates. Each section of bumper is provided with guard made up of interconnected vertical and horizontal tubular members connected to additional bases of energy-absorbing devices and shock-absorbing devices connected to tubular members of guard and load-bearing structure of automobile and made integral of two leaf springs. Bumper includes outer sheathing with thinning sections to provide order destruction in preset places and elastic resilient members in form of cylinders connected to tubular members of guard.
EFFECT: simplified design, provision of high energy-absorbing properties and stability of shock absorbing, possibility of repeated use of structure.
3 cl; 6 dwg
FIELD: mechanical engineering.
SUBSTANCE: shock-absorbing device comprises housing made of a closed chamber filled with deformable members. The deformable members are made of hollow unclosed members whose strength is less or equal to that of the housing and glass hollow microscopic spheres. The inner spaces of the closed chamber and hollow members are filler with the glass hollow microscopic spheres.
EFFECT: enhanced efficiency.
FIELD: transport engineering.
SUBSTANCE: invention relates to collision protective devices and it can be used as front and rear bumpers of different passenger cars, minibuses and other vehicles. proposed buffer to be connected to bearing structure of car has common outer sheathing and central and side sections whose support surfaces are connected to each other through connecting energy-absorbing devices with leaf springs. Main energy-absorbing devices are connected to support surfaces of sections being uniformly spaced and including definite number of interconnected absorbing mirror-like members. Each energy-absorbing member is made integral from section of round metal bar and provided with base, bridge and brace arranged in relatively perpendicular planes. Braces of main energy-absorbing devices are arranged horizontally, being connected to plates of movable bases made integral with leaf springs. Braces of main energy-absorbing devices of left-hand and right-hand parts of buffer are pointed to different sides, respectively, in directions from middle to edges of buffer. Buffer is furnished additionally with energy-absorbing devices made in similar manner, connected to bearing structure of car and interacting through braces with rear surface of corresponding side section of buffer.
EFFECT: high energy absorbing capacity and stability of shock absorbing characteristics with possibility of repeated use.
3 cl, 8 dwg