79results about How to "Reduce radial stiffness" patented technology

A tolerance ring comprising a metallic band for spring features and a complementary low friction material for frictional considerations is disclosed. The tolerance ring is designed to operate within a precisely controlled torque or axial force band to provide a defined amount of resistance and sliding force control between components that move relative to each other. Isolated portions of the tolerance ring form regions of contact with adjacent ones of the components. Other surfaces of the tolerance ring comprise portions with spring features that have geometry suitable for their spring rate, rather than conforming to mating surfaces of the adjacent components.

Tubular baseball bats comprised of an elongated handle portion and a striking or barrel portion wherein the barrel portion has variable stiffness along its length. One such bat has a circumferential low cost, low weight stiffener generally located in the sweetspot area designed to increase radial stiffness in a controlled manner which results in decreasing the bat performance to meet a changed bat performance standard and can be applied at low cost to both used field returned bats and bats being newly manufactured. Further, new tubular polymer composite bats can be designed with increased radial stiffness generally located in the sweetspot area or with radial stiffness graduated from highest, generally in the sweetspot area, to lowest at the barrel ends. All bats of the present invention result in calculated bat performance to meet applicable regulatory standards while also increasing the sweetspot size.

The invention provides an aerial camera Cassegrain primary and secondary mirror supporting structure, belongs to the technical field of optical engineering, and aims at solving problems in the prior art that the supporting structure is complex, the processing and adjusting cycle is long and cost is high. A primary mirror base is fixedly connected with one end of a mirror cone. A primary mirror gasket is arranged between the primary mirror base and the mirror cone. A secondary mirror base is fixedly connected with a connecting frame. An axial gasket and an angular gasket are arranged between the secondary mirror base and the connecting frame. The connecting frame is fixedly connected with the other end of the mirror cone. A primary mirror and a secondary mirror are respectively fixed on the primary mirror base and the secondary mirror base. Flexible hinges are directly processed on the primary mirror base and flexible slots are processed on the secondary mirror base so that stress transmitted to the surface of a reflecting mirror in change of external environment temperature and the assembling process can be reduced and optical surface figure accuracy can be enhanced; and axial distance and relative angle of the primary mirror and the secondary mirror are adjustable so that the primary mirror and the secondary mirror are ensured to possess correct spatial position, and the assembling process is simple and short in the cycle.

A multi-axis spring damping element includes two spring damping cushion members received between caps on a bolt shaft, and an axial adjustment mechanism at a free end of the bolt shaft. The other end of the bolt shaft is connected to a support structure, and a load to be supported in a vibration-damped manner is carried by intermediate caps between the two spring damping cushion members. A plurality of such spring damping elements forms a spring damping system, for example for supporting a payload-carrying pallet on a load platform of a spacecraft.

An elastomer bush bearing, wherein the bearing body (2) is encapsulated through axial flanges (4, 4′) of the outer bearing sleeve (3), with the bush bearing having an elastomer bearing body (2) with a special profile in the axial direction. The bearing body (2) is employed in constructing the bush bearing of the invention, which is capable of supporting high radial loads even with low radial stiffness and without adversely affecting its stability and service life. The two axial end faces (5, 5′) of the bearing body (1) each have undulated contours which extend in the circumferential direction (u) in the same direction, both with respect to one another and also over the entire region of the material thickness (d) of the bearing body (2). The end faces (5, 5′) of the bearing body (2) thus have wave troughs (6, 6′, 7, 7′) and wave crests (8, 8′, 9, 9′), whereby the corresponding wave troughs (6, 6′, 7, 7′) of both end faces (5, 5′) and their wave crests (8, 8′, 9, 9′) are formed so as to face one another, and each extend radially over the entire material thickness (d) of the bearing body (2) in the respective circumferential segment.

The invention discloses a hybrid shock absorber based on a Stewart structure. The hybrid shock absorber comprises an upper top plate, a lower bottom plate and six shock absorption units obliquely arranged between the upper top plate and the lower bottom plate in the circumferential direction. The upper end of each shock absorption unit is connected with the upper top plate through an upper rod endjoint bearing, and the lower end of each shock absorption unit is connected with the lower bottom plate through a lower rod end joint bearing. Every two adjacent shock absorption units are mutually symmetrical, and the included angles between the shock absorption units and the upper top plate and the included angles between the shock absorption units and the lower bottom plate are all equal. Theshock absorption units comprise upper end covers, lower end covers, upper diaphragm springs, magnetic eddy current dampers and lower diaphragm springs, wherein the upper diaphragm springs, the magnetic eddy current dampers and the lower diaphragm springs are sequentially connected from top to bottom. The upper end covers and the upper diaphragm springs are fixed to the upper sides of the magneticeddy current dampers from top to bottom, and the lower diaphragm springs and the lower end covers are fixed to the lower sides of the magnetic eddy current dampers from top to bottom. Through matchedusing of the diaphragm springs and the eddy current dampers, the shock absorption effect is greatly enhanced, the whole hybrid shock absorber is a simple in structure, and six-degree-of-freedom shockabsorption can be achieved.

The invention discloses a method for forming a liquid rubber composite node with a pipe body flow passage and a node, wherein the forming method comprises the steps of additionally arranging a middlespacer sleeve between an outer sleeve and a core shaft, vulcanizing and bonding the middle spacer sleeve and the core shaft together through rubber, and assembling the middle spacer sleeve and the core shaft which are integrally formed into a whole into the outer sleeve; and arranging the pipe body flow passage in the core shaft, forming a plurality of spaces in the middle spacer sleeve by hollowing, after vulcanization, forming a plurality of liquid cavities independent of each other by the rubber and the plurality of spaces, arranging liquid in the plurality of liquid cavities, and the liquid cavities communicating with one another through the pipe body flow passage. The method for forming the liquid rubber composite node with the pipe body flow passage and the node can provide smaller radial rigidity and larger axial rigidity, and realize larger dynamic-static ratio, thereby optimizing the product performance of the liquid rubber composite node.

A primary mirror flexible support mechanism relates to a primary mirror flexible support mechanism. The mechanism is provided to solve the problem of the existing primary mirror support mechanism, namely, the existing mechanism cannot isolate outside temperature change and has alignment error, the axial support component mechanism and the radial support mechanism interfere with each other as the pitch angle changes, and thus, the surface shape of the primary mirror is affected. The primary mirror flexible support mechanism comprises a support base, an axial support component supporting a primary mirror, a tensile component glued onto the back of the primary mirror, a radial support component glued to the center of the primary mirror, and a protective component. The radial support component comprises a flexible mandrel adhered into the center hole of the primary mirror, a center cylinder installed in the middle of the support base through spigot fitting, and a flexible diaphragm arranged between the center cylinder and the flexible mandrel. The protective component comprises an O-shaped rubber ring and a protective ring. The problem that the primary mirror may be broken due to overturn after failure of the axial support is prevented. The protective device ensures that the primary mirror can be protected under certain amplitude of vibration.

The invention discloses a forming method of a liquid rubber composite joint with an inner groove flow channel and the joint. The forming method comprises the steps that a middle spacing sleeve is additionally arranged between an outer sleeve and a core shaft, the middle spacing sleeve and the core shaft are pasted together through rubber vulcanization, and the middle spacing sleeve and the core shaft which are integrated are assembled into the outer sleeve; and the inner groove flow passage is arranged in the core shaft, the middle spacing sleeve is hollowed out to form a plurality of spaces,after vulcanization is carried out, rubber and the multiple spaces form a plurality of independent liquid cavities, liquid exists in the multiple liquid cavities, and the multiple liquid cavities arein communication with each other through the inner groove flow channel. By means of the forming method and the joint, small radial stiffness and large axial stiffness can be provided, a large dynamicand static ratio is achieved, and the product performance of the liquid rubber composite joint is optimized.

The invention concerns a novel type of turbomachine. The stator of the turbomachine comprises a plurality of profiled members forming stiffeners arranged on the blade stage. The profiled members are distributed uniformly at periphery of the blade stage and individually between two consecutive blades. The stiffeners are fixed to the internal and external ferrules of the stator in order to uniformly increase the axial and radial stiffness of the stator in normal operation of the turbomachine and to allow the internal ferrules to have a limited displacement during the normal functioning of the turbomachine. This makes it possible to reduce the axial sizing of the turbomachine, and consequently its mass.

The invention concerns a novel type of turbomachine.According to the invention, the stator of the turbomachine comprises a plurality P of profiled members forming stiffeners arranged on the blade stage while being distributed uniformly at its periphery and individually between two consecutive blades, the stiffeners being fixed to the internal and external ferrules of the stator in order to uniformly increase the axial and radial stiffness of the stator in normal operation of the turbomachine and to allow to the internal ferrules to have.The invention makes it possible to reduce the axial sizing of the turbomachine, and consequently its mass.Application to aircraft engines, such as jet engines.

A vacuum pump comprises a housing, a drive shaft supported by a beating arrangement for rotation relative to the housing about an axis, and a pumping mechanism comprising a stator component mounted on the housing and a disk-shaped rotor component mounted on the drive shaft axially proximate the stator component. The bearing arrangement comprises a bearing supported in both radial and axial directions by a resilient support, comprising inner and outer annular portions connected by a plurality of flexible members, so that there is a fixed relation between the inner race of the bearing and the outer portion of the resilient support to determine the axial clearance between the rotor and stator components of the pumping mechanism.

Methods and apparatuses for improved damping in high-temperature superconducting levitation systems are disclosed. A superconducting element (e.g., a stator) generating a magnetic field and a magnet (e.g. a rotor) supported by the magnetic field are provided such that the superconducting element is supported relative to a ground state with damped motion substantially perpendicular to the support of the magnetic field on the magnet. Applying this, a cryostat housing the superconducting bearing may be coupled to the ground state with high damping but low radial stiffness, such that its resonant frequency is less than that of the superconducting bearing. The damping of the cryostat may be substantially transferred to the levitated magnetic rotor, thus, providing damping without affecting the rotational loss, as can be derived applying coupled harmonic oscillator theory in rotor dynamics. Thus, damping can be provided to a levitated object, without substantially affecting the rotational loss.

The invention discloses an air-free tire and an automobile. The air-free tire comprises a rubber tread and a wheel spoke, and the rubber tire face is arranged on the wheel spoke in a sleeving mode; the wheel spoke comprises a wheel spoke outer ring, a wheel spoke middle ring, a wheel spoke inner ring, inner spokes and outer spokes. The two ends of the outer spokes are fixedly connected with the wheel spoke outer ring and the wheel spoke middle ring correspondingly, the two ends of the inner spokes are fixedly connected with the wheel spoke middle ring and the wheel spoke inner ring correspondingly, and the outer spokes, the wheel spoke middle ring and the inner spokes form a fishbone-shaped structure. The automobile comprises the air-free tire. According to the air-free tire and the automobile, the phenomenon that tire burst occurs when the automobile travels at high speed is prevented, and safety and reliability of automobile driving are improved.

The invention discloses an airless tire and a car. The airless tire comprises a rubber tread and a spoke, the spoke is sleeved with the rubber tread and comprises a spoke outer ring, a spoke middle ring and a spoke inner ring, the spoke outer ring is fixedly connected with the spoke middle ring through outer wire spokes, and the spoke middle ring is fixedly connected with the spoke inner ring through inner wire spokes; any two adjacent outer wire spokes are symmetrically distributed with respect to the center line of the two outer wire spokes and any two adjacent inner wire spokes are symmetrically distributed with respect to the center line of the two outer wire spokes. The car comprises the above airless tire. By means of the airless tire and the car, tire bursting of the car during high-speed running can be prevented, and the car travelling safety and reliability are improved; the radial elastic performance and the buffer capacity of the airless tire are improved, and the car travelling smoothness is improved; and meanwhile, it is guaranteed that braking and acceleration are not lagged.

A winding machine (1) for a traversing application of a winding material (51) to a spool sleeve (27) comprises a spindle (8) which is supported for being rotated and for having a fixed axial position. The spindle (8) comprises an inner recess. The winding machine (1) comprises a drive driving the spindle (8) for a rotational movement and a traversing carriage (20). The traversing carriage (20) is supported on the spindle (8) for being movable with a traversing motion (18) in an axial direction relative to the spindle (8). A first coupling element serves for transmitting the rotational movement of the spindle (8) to the traversing carriage (20) and a second coupling element serves for transmitting the traversing motion (18) of the traversing carriage (20) to the spool sleeve (27). The winding machine (1) also comprises an actuation mechanism (30) executing the traversing motion (18). The actuation mechanism (30) is coupled to the traversing carriage (20) for transmitting the traversing motion (18) from the actuation mechanism (30) to the traversing carriage (20). The actuation mechanism (30) extends through the inner recess of the spindle (8).

The invention discloses a full-slot self-restoration frictional overrun clutch. The frictional overrun clutch is characterized in that when internal and external diameters of the clutch are the same, by arranging both friction surfaces of a roller or an inclined support and inner and outer rings into V-shaped slopes, the heights of sections of two rings are increased by the means of reducing a radial gap between the inner and outer rings so as to increase respective radial rigidity of the inner and outer rings on condition of greatly enlarging a wedge angle by increasing a friction coefficient of a friction pair; and finally, the frictional overrun clutch with higher rigidity and a greater wedge angle is obtained. Meanwhile, two radial sides of the roller or the inclined support are naturally provided with a self-keeping capability and a restoration capability for working postures / positions and a capability of axially connecting the inner and outer rings into a whole because of the restraint of two circumferentially-stretched V-shaped slots; and therefore, the requirements of the clutch on a retainer and the requirements on manufacturing and assembling precision of the clutch are greatly reduced so that the clutch is more reliable to work, greater in bearing capability and longer in service life.

A flexible structure and design method for rocket engine thrust fidelity measurement are provided. The flexible structure comprises an upper body of an elongated cylindrical structure, the lower end of the upper body is connected with the upper end of a transitional body; the transitional body is of a structure similar to a half spheroid; the lower end of the transitional body is connected with the upper end of the weak body; the weak body is a rotary structure formed by rotation of two circular arcs around the axis; the lower end of the weak body is connected with the top of the lower body; the lower body is a flat cylinder structure; the upper body, the transitional body, the weak body and the lower body are integrally cut and formed. The design method is to analyze the engineering situation and define the stress condition and boundary condition. Then the topology reduction optimization is carried out to determine the initial shape of the flexible structure and the topology reductionoptimization is carried out. Repeated iteration is performed to achieve the ideal value; then the three-dimensional structure is designed on the basis of two-dimensional images. The three-dimensionalfinite element simulation analysis is carried out; whether the structure is reasonable or not is judged and the structure is finally output. The flexible structure of the invention has less influenceon the force transmission effect, so that the experiment result is more accurate.

The invention discloses a method for forming a liquid cavity through adding of a multi-part middle spacing sleeve. Firstly, the multi-part middle spacing sleeve is additionally arranged between a mandrel and an outer sleeve; then, the multi-part middle spacing sleeve is hollowed to form multiple space; the multi-park middle spacing sleeve and the mandrel are bonded through rubber vulcanization; and multiple independent liquid cavities are formed by using rubber and the multi-part middle spacing sleeve. The method can provide lower radial rigidity and higher axial rigidity to realize a higher dynamic-static ratio to optimize the product performances of liquid rubber compound nodes.

The invention provides a piston assembly and a compressor with the same. The piston assembly is arranged in an air cylinder and comprises a piston, a drive rod mechanism and a flexible connection mechanism, wherein the drive rod mechanism is connected to the piston in a drive mode, and the flexible connection mechanism is connected between the piston and the drive rod mechanism for driving the drive rod mechanism to drive the piston to do reciprocating motion in the center direction of the air cylinder. The radial stiffness of the flexible connection mechanism is small, the piston can be concentric with the air cylinder when moving, the lateral force exerted on the piston from the air cylinder is lowered when the piston moves, frictional loss between the piston and the air cylinder is reduced, and the working performance is improved.

The invention discloses a multi-stage elastic cabin vibration isolating device realizing vibration damping based on a pneumatic tire. The multi-stage elastic cabin vibration isolating device comprisesa housing, two end part connecting parts, a vibration isolating component and two sealing parts, wherein the vibration isolating component and the two sealing parts all are arranged inside the housing; the outer wall of the housing is fixedly connected with the wall of a cabin; the sealing parts are symmetrically arranged by taking a vibration isolating component as the center; the sealing partsand the vibration isolating component are coaxially arranged on a pipeline in a sleeving manner, and the end faces of the sealing parts and the vibration isolating component are pressed closely; the two end part connecting parts are correspondingly arranged at the two ends of the housing and are connected with the sealing parts; the vibration isolating component comprises a first-stage vibration isolating group; the first-stage vibration isolating group comprises a plurality of first-stage pneumatic tires which are nested in the radial direction; and the outer circumferential surface of each first-stage pneumatic tire is provided with a plurality of circumferential saw-toothed slots. The multi-stage elastic cabin vibration isolating device disclosed by the invention has the beneficial effects that a plurality of layers of pneumatic tires are overlapped together to form a pneumatic tire structure having a cavity; the structure is deformed after being extruded; the air in the cavity alsohas certain rigidity; and thus multi-stage vibration isolation is realized in the radial direction.

The invention relates to a wheel. The wheel comprises a hub 2, a rim 4 and a plurality of springs 3 for connecting the hub 2 and the rim 4 and transmitting radial force, and is characterized in that: the hub 2 and the rim 4 are also connected through a two-dimensional zero angle displacement guide which is a two-stage four-connecting rod; the two ends of each spring 3 are fixed or hinged to the hub 2 and the rim 4; and a tension or compression spring 3 with initial tension or initial pressure also can be connected to the hub 2 and the rim 4 through a connecting piece with zero tension rigidity or zero compression rigidity. When the wheel runs on the flat ground and is not subjected to impact force, the stress of the spring 3 is lower than the initial tension or the initial pressure, and the rigidity of the wheel is equal to the radial rigidity of a tire; when the wheel is subjected to the impact force, the tension or compression spring 3 is further tensioned or compressed, and the rigidity of the wheel can be far lower than the radial rigidity of the tire, so a vehicle is not provided with a suspension; and the wheel is particularly suitable for an automobile using an integral axle or a two-wheel vehicle using an integral frame.

Various embodiments provide a rotating electrical machine (10) that includes an electrical supply coupled to a stator (13), a rotor (12), and a plurality of roller elements (or brushes) (15) for transferring electrical current from the stator (13) to the rotor (12). In one embodiment, each roller element (15) is compressed between the rotor (12) and the stator (13) so that outward forces resulting from expansive properties of each roller element (15) urge the roller element (15) into contact and maintain the roller element (15) in contact with the rotor (12) and the stator (13). For example, in one embodiment, each roller element (105) has a hollow, substantially cylindrical body formed of a conductive material that is elastically biased in a radially outward direction to maintain contact with the rotor (12) and the stator (13).

An elastic wheel for a rail traffic vehicle comprises a tire, a wheel core and elastic bodies, wherein the tire and the wheel core are radially separated to form radial clearances and are circumferentially separated to form circumferential clearances; N*2 circumferential clearances are circumferentially uniformly distributed, and N is not less than 3; each elastic body is compressed into the corresponding circumferential clearance; the elastic bodies are radially separated from the tire and the wheel core without contact; and the circumferential clearances are arranged parallel to two sides towhich the elastic bodies are clung. With the adoption of the elastic wheel for the rail traffic vehicle, the radial rigidity of the elastic wheel can be effectively reduced; the radial axis rigidityratio of the elastic wheel is reduced; the vibration condition of a lower part of a vehicle spring is reduced; the structure stability and reliability of the elastic wheel is improved; the rigidity demand of the lower part of the vehicle spring in a low-floor vehicle under different route conditions can be met; the use safety of the elastic wheel is improved; the production cost and the maintenance cost of the elastic wheel are low; and the practicability of the elastic wheel is improved. The invention also supplies an assembling method and a rigidity design method of the elastic wheel for therail traffic vehicle.