301 results about "Radial compression" patented technology

A tertiary cooperative compression yielding and energy-absorbing support mechanism. The compression yielding and energy-absorbing anchor cables play a basic support role, and the circumferential compression yielding device can make the primary support compression yielding arch frame have a constant resistance deformation in the circumferential direction, while the primary support compression yielding arch frame and the secondary lining steel arch frame have a relative dislocation movement in the radial compression yielding device, and the tertiary compression yielding and energy-absorbing structures are cooperated with each other to adapt to the over-meter large deformation movement of the surrounding rock.

The thrombectomy device comprises a thrombectomy support, a connecting pipe and a traction wire, an inner cavity is formed in the thrombectomy support with the traction wire, the thrombectomy support with the traction wire comprises a cutting part located at the near end, and an opening which is communicated with the inner cavity of the traction wire and is closed in the circumferential direction is formed in the cutting part of the traction wire. The traction wire cutting part comprises a far-end end part and a near-end end part which have an axial distance; the connecting rod is connected with the near-end end part of the traction wire thrombectomy bracket; the far end of the traction wire is connected with the traction wire thrombectomy support, and when the traction wire is subjected to traction action pointing to the near end, the traction wire applies radial compression force to the traction wire thrombectomy support. The thrombus extraction efficiency of the thrombus extraction device is high.

Disclosed is a rupture disc assembly for use in making a temporary seal in a vessel such as a casing string. The rupture disc assembly may include a rupture disc having a side surface that has a shallow angle taper inward towards a bottom surface of the rupture disc, and a mounting apparatus to support the rupture disc so that the rupture disc forms the temporary seal. When a disc working pressure is applied to a top surface of the rupture disc, engagement / force transmission between the rupture disc and the mounting apparatus produces enough radial compression in the rupture disc due to the shallow angle taper to significantly mitigate or cancel tensile stresses thereby avoiding the rupture disc from breaking. The rupture disc may be configured to break when the rupture disc is subjected to a disc working pressure that is greater than the disc rupture pressure, thereby removing the temporary seal. An axial abutment surface feature may be provided which is configured and operable to limit downward axial movement of the rupture disc relative to said disc support mechanism and thus be operable to restrict the amount of compression said tapered wall surface of said disc support mechanism can exert on said at least a portion of said rupture disc when the top surface of the rupture disc is subjected to said hydraulic pressure within the well.

The invention belongs to the technical field of deep sea equipment, and particularly relates to a deep sea plugging device and a floating base radial pressing force adjusting method thereof. The device is located in a water injection type pressurization cabin, and a driving sliding table mechanism and a floating base are sequentially arranged along the same axis; the driving sliding table mechanism comprises a sliding rail, a sliding rail cabin, a lead screw assembly, a driving motor, a tension and compression sensor and a displacement sensor, the motor drives a lead screw to enable the sliding rail to do reciprocating linear motion through sealing, the two ends of the sliding rail cabin are sealed, and plugging force and displacement data are collected through the sensor; the floating base is composed of a fixing plate, a floating positioning sleeve, a pressing disc and circumferentially distributed elastic adjusting assemblies, the connector female end is installed in the floating positioning sleeve, the elastic adjusting assemblies are distributed along the periphery of the floating positioning sleeve, when axial eccentricity exists in plugging of the connector male end and the connector female end, the floating positioning sleeve is automatically centered under the elastic effect, and interference of eccentric force is eliminated. According to the invention, high-precision, repeatable and controllable testing of the plugging performance of the connector in a high-pressure, high-salt and high-corrosion environment is realized.

The invention discloses a railway overhead cable inspection robot, and relates to the technical field of overhead line inspection, the railway overhead cable inspection robot comprises an inspection box, the upper surface of the inspection box is fixedly connected with a working plate, the upper surface of the working plate is fixedly connected with a motor, and the upper surface of the working plate is rotatably connected with a rotating shaft; the outer side of the rotating shaft is fixedly connected with a rotating plate, and the upper end of the rotating shaft is fixedly connected with the output end of a motor. According to the railway overhead cable inspection robot, when the device moves to a cable butt joint part, two groups of rotating plates synchronously release radial extrusion on a first airbag, the volume of a second airbag is synchronously reduced, displacement generated by deformation of the second airbag can drive a driving plate to reversely rotate, and at the moment, two groups of laser detectors can synchronously move outwards under the driving action of a pulling plate; in view of the fact that the width of the cable butt joint part is obviously larger than that of a single overhead cable, the laser detector achieves more accurate coverage detection of the butt joint area through the design of enlarging the distance between the detection modules.

The invention relates to an axial compression spiral oil press. According to the technology provided by the invention, the original radial compression that the outer diameter of the main shaft outer sleeve is changed from thin to thick to change the volume is changed into the same outer diameter of the main shaft outer sleeve from beginning to end. And axial compression is adopted. Therefore, rotation friction resistance is greatly reduced, matching power can be saved by 40%, extrusion of oil residues is reduced due to the fact that axial compression is changed, and the phenomenon of paste squeezing is avoided. And labor is saved when the shaft is pulled outwards.

The bearing device comprises a bearing 10, which is provided with a first ring 12 and a second ring 14, which are rotatable relative to each other. The device comprises at least one insulating sleeve 26, which is attached to the second ring 14 of the bearing and is provided with a bushing 28 and an insulating insert 30, which is formed on at least one of the outer and inner surfaces of the second ring 14 and on at least one outer or inner surface of the bushing 28, which limit its radial thickness. The device also includes at least one elastically deformable element 32, which lies radially between the second ring 14 and the bushing 28 and is in radial contact with at least one of the surfaces of the first ring and the surface of the bushing 28 by being compressed in the radial direction.

Clamp suitable for joining two plain ends, with extra thickness on radially inner surfaces Clamp for joining two plain ends extending along a central axis, comprising: - a first half-collar (16A) and a second half-collar forming a strapping, - a sealing sleeve made of elastomeric material intended to surround the two plain ends and to be compressed radially between the two plain ends and the strapping, - systems for fixing the half-collars to each other. The collar is movable between a rest configuration and a clamped configuration. Each of the first half-collar and the second half-collar defines a radially outer surface (30) and a radially inner surface (32).In the rest configuration, the radially outer surface extends along a first arc of a circle (C1) having a first center (Ω1), and points (M) of the radially inner surface are located at a variable distance (D) from the first center due to at least one excess thickness (42). Figure for abstract: Figure 3.

This invention provides a pump body assembly, a compressor, and a refrigeration device. The pump body assembly includes a crankshaft, a pump body, a bearing, a piston, and connecting members. The bearing is sleeved on the crankshaft and located on one axial side of the pump body, forming a compression chamber with the pump body. The piston is sleeved on the crankshaft and located within the compression chamber. Multiple connecting members are arranged circumferentially along the pump body, passing through the bearing and connected to the pump body. Each connecting member includes a first connecting member and at least one second connecting member. The first connecting member is closer to the exhaust position of the compression chamber than the second connecting member, and is further away from the crankshaft axis than the second connecting member. The greater distance between the first connecting member and the crankshaft axis corresponding to the exhaust position significantly reduces the radial compression force exerted by the first connecting member on the inner wall of the compression chamber at the exhaust position, thereby reducing the localized protrusions formed on the inner wall of the compression chamber due to the first connecting member locking the pump body.

Provided is a downhole tool, a well system, and a method for forming a well system. The downhole tool, in one aspect, includes a latch collet including a collet body, the collet body having a collet body opening extending through a thickness (tcb) thereof and a plurality of collet fingers, as well as a mandrel positioned within the collet body, the mandrel having a mandrel slot therein. The downhole tool, according to this aspect, further includes a bore sensor positioned within the collet body opening and the mandrel slot, the bore sensor configured remain in a radially extended state when the latch collet is in too large size casing and configured to be pushed to a radially compressed state when the latch collet is in the correct size casing and thereby not prevent the collet body and the mandrel from sliding relative to one another.

The invention relates to an electricity taking device for electric power measurement and a use method thereof, and belongs to the technical field of electric power measurement. According to the electricity taking equipment for electric power measurement and the using method thereof, the electricity taking equipment for electric power measurement comprises a three-phase electricity meter and an installation frame, the installation frame is fixedly connected to the surface of the three-phase electricity meter, a safety module and an electromagnetic switch are installed in the installation frame, and a protection module fixedly connected with the installation frame is installed on the surface of the safety module; the protection module is fixedly connected between the safety module and the mounting frame through the rubber frame, and high elasticity and damping characteristics of the protection module form a first shock absorption barrier, so that low-frequency vibration can be effectively absorbed. The capsule ring is sleeved on the surface of the connection position of the terminal of the fuse module, and the capsule ring is tightly attached to provide continuous radial pressing force, so that the terminal is prevented from loosening due to vibration, the stability of electrical connection is ensured, and the problem of connection failure caused by vibration is fundamentally solved.

Systems and methods which provide a bulkhead anchor configuration in which an anchor body includes flexure finger members and a radial bulkhead operable in cooperation to impart a radial compressive force to a corresponding lead body are described. A first portion of a bulkhead anchor body may comprise a plurality of flexure finger members disposed in a corolla configuration forming an anchor lumen through which a lead body may be inserted. A second portion of the bulkhead anchor body may comprise a radial bulkhead having a flexure profile configured to operatively engage the flexure finger members. A locking mechanism may be used to retain the first and second portions of the bulkhead anchor in their relative positions such that the radial compressive force is maintained upon the lead body indefinitely.

The utility model relates to a valve frame and an artificial heart valve. The valve frame can be switched between a radial compression structure and a radial expansion structure; each of an inflow row grid, an outflow row grid and a middle row grid of the valve frame comprises two rows of wave rods which are oppositely arranged and connected with each other, each row of wave rods comprises a plurality of supporting rods, and the opposite ends of every two adjacent supporting rods are connected at a joint part; each joint part comprises a solid part and a vacant part radially penetrating through the solid part, the opposite ends of the two adjacent supporting rods are smoothly connected with the solid part on the two sides of the vacant part, the vacant part is also in a smooth shape, and an opening of the vacant part corresponding to the wave crest of the wave rod faces the wave trough in the axial direction; the opening of the vacant part corresponding to the wave trough of the wave rod faces the wave crest in the axial direction; the joint part is used for helping each grid to uniformly deform in the structure conversion process of the valve frame; the width of the solid part is larger than or equal to the sum of two times of the width of the supporting rod and the width of the vacant part. The heart valve prosthesis comprises the valve frame, a covering film and at least two artificial valve leaflets capable of being opened and closed oppositely.

To provide a favorable apparatus and the like.SOLUTION: An apparatus for delivering a vascular arteriovenous graft includes a tubular sleeve 44 defining an internal lumen adapted to be slidably disposed over a tunneling instrument 42. Upon advancement of the tunneling instrument to a desired subcutaneous anatomical location, a shaft is removed while the sleeve remains in a tissue. The sleeve has a linear slit 58 extending from a proximal end to a midpoint of the length of the sleeve. The lumen receives a distal end of the graft and at least a portion of a cannulation chamber. An end portion of the sleeve gradually expands along the slit, providing an enlarged diameter to accommodate the cannulation chamber. A longitudinal force applied to the sleeve from the tissue when the sleeve is removed from the tissue, fixes the graft within the sleeve by radial compression of the sleeve, and the graft and the sleeve are pulled through the tunnel to deploy the vascular graft.SELECTED DRAWING: Figure 8

This utility model relates to the field of rubber hose joint sealing technology, specifically a rubber hose joint sealing component, including a rubber sealing sleeve. A conical sealing sleeve is fixedly installed at one end of the rubber sealing sleeve, and a spiral compression ring is threadedly connected to the end of the conical sealing sleeve away from the rubber sealing sleeve. Multiple annular ridges are fixedly provided on the inner wall of the rubber sealing sleeve. When the spiral compression ring is rotated, the thread converts the axial displacement into radial compression. The conical surface of the conical sealing sleeve is compressed, generating an initial sealing force. When the fluid pressure inside the pipe increases, the rubber expands further under pressure, and the conical surface of the conical sealing sleeve engages more deeply with the thread of the spiral compression ring, forming a positive feedback seal. At the same time, the pipe and the annular ridges fit more tightly. Furthermore, when the spiral compression ring is rotated, its internal thread advances along the conical surface of the conical sealing sleeve, converting the axial force into radial compression force, forcing both the conical sealing sleeve and the rubber sealing sleeve to fit tightly against the pipe, thereby significantly improving the sealing performance of the rubber hose joint.

The utility model discloses a kind of paper sleeves for preventing metal coiled material from collapsing, comprising: main body cylinder, by multiple layers high-strength kraft paper adhesion;Radial reinforcement structure, is set to one end of the main body cylinder End, and it is distributed along circumference direction;Axial stiffener, along the axial extension of the main body cylinder, and it is set to the wall of the main body cylinder;Waterproof barrier layer, is set to the outer surface of the main body cylinder;Buffer layer, is set to the inner wall of the main body cylinder, the utility model relates to paper sleeve technical field.The paper sleeve for preventing metal coiled material from collapsing, radial compression strength is greatly promoted, can effectively resist the weight and external impact of heavy coiled material, the waterproof barrier layer of outer surface makes paper sleeve have waterproof capacity, effectively prevent inner circle indentation, scratch and other surface defects, improve the finished product quality of coiled material, embedded reinforcing ring or annular protruding portion is integrated with main body cylinder, stress is uniform, there is no risk of loosening and falling off.

A hose assembly includes an inner tube, a connector, a collar, and an outer metal conduit. The connector includes a stem portion inserted into a distal end of the inner tube and a body portion extending radially outward and axially rearward of the stem portion. The collar is substantially coaxial with and surrounds the distal end of the inner tube, with the collar being in radial compression against the inner tube. The outer metal conduit is substantially coaxial with and surrounds the inner tube and the collar, with the outer metal conduit terminating at a distal end welded to the body portion of the connector.

A delivery assembly constituted of: a prosthetic valve comprising a plurality of intersecting struts, and a delivery apparatus comprising: a handle; a delivery shaft extending distally from the handle; and a flex sensing assembly, comprising: at least one flex sensor coupled to at least one of the plurality of struts; and a control unit in communication with the at least one flex sensor, wherein the prosthetic valve is movable between a radially compressed configuration and a radially expanded configuration, and wherein, responsive to an output of the at least one flex sensor, the control unit is configured to generate a signal indicative of a diameter of the prosthetic valve.

When a spiral-wound gasket is fitted into the gasket housing groove and tightened, the sealing performance of the spiral-wound gasket is maintained even if there is a difference in compression in the radial direction. [Solution] The spiral gasket 30 comprises multiple types of hoop material, each consisting of a strip-shaped metal material wound in a spiral shape, and a filler material 33 made of a softer material than these hoop materials, interposed between the hoop materials in the radial direction. The multiple types of hoop material include a first hoop portion 31 made of a first metal material with a first Young's modulus and a second hoop portion 32 made of a second metal material with a second Young's modulus lower than the first Young's modulus. It is used in areas where the compression amount of the second hoop portion 32 is greater than the compression amount of the first hoop portion 31.

The invention discloses a composite material with longitudinally distributed basalt fibers as well as a preparation method and application of the composite material. The composite material comprises at least one layer of base plate, wherein the base plate is formed by closely paving a plurality of prismatic unit bodies which are consistent in thickness and have regular polygonal cross sections; the unit bodies in the composite material are fixed into a whole through an adhesive; the unit body is composed of a plurality of basalt fibers which are longitudinally arranged; the fiber direction of the basalt fibers in the unit bodies is the same as the axis direction of the unit bodies and is perpendicular to the plate face of the base plate obtained by tiling the unit bodies. The core of the bulletproof armor plate is that the distribution direction of basalt fibers is changed from the radial direction to the axial direction, so that the problem that the radial pressure resistance is insufficient when traditional fibers are transversely distributed is solved, and the prepared bulletproof armor plate can convert impact force of bullets into pressure on the axial direction of the fibers; the extremely high axial compressive strength of the basalt fibers is fully utilized, so that the bulletproof efficiency is remarkably improved, and the light weight of the armor is achieved.

Bearing damper systems for gas turbine engines include a bearing structure and, a housing arranged outward from the bearing structure and defining a plurality of axially extending recesses arranged circumferentially about the axis. A set of energy dissipating elements are arranged within the recesses and are axially constrained therein. The energy dissipating elements are arranged to receive a radial outward force from the bearing structure. Each energy dissipating element may be radially compressed while being axially constrained in response to a radial movement of the bearing structure and enter a loaded state with energy associated with the compression is absorbed into the material of the energy dissipating element. Each energy dissipating element is configured to convert at least a portion of the absorbed energy to heat and is configured to return to an unloaded state after removal of the load from the bearing structure.

A device is provided for securing a prosthetic valve at a native valve. The docking device can include a coil comprising a plurality of helical turns when in a deployed orientation. The docking device can include a compressible plug attached to the coil by being coupled to at least a portion of a helical turn thereof. The compressible plug is movable between a radially compressed state in a delivery orientation and a radially expanded state in the deployed orientation. The compressible plug includes: a compressible scaffold formed from a shape-memory material; and a plugging component operably coupled with the compressible scaffold to provide a liquid plugging function to the compressible plug.

The invention discloses a laser welding strong co-processing method and tool for a stranded conductor. The method sequentially executes five working procedures that radial compression force and axial pretension are applied to the stranded conductor to construct quasi-materialization constraint, and preheating is conducted; laser welding is executed in the local inert gas microenvironment, and the temperature of a molten pool is monitored; a sacrificial absorption layer is arranged, a deionized water restraint layer is injected, and a flexible anvil block loaded with liquid metal-based magnetorheological fluid is arranged on the back of a conductor; the magnetic field intensity is dynamically adjusted according to the material of a processing area, reflection is inhibited by using carrier liquid acoustic impedance matching in a low-impedance metal section, a backing is in a quasi-solidified state to absorb shock wave residual energy through magnetic particle chaining in a high-impedance metal section, and laser shock peening is executed; and after strengthening, the compression force is unloaded to recover micro-pores among the strands, so that the through-layer drying of stranding gaps is realized. According to the invention, multi-physical field cooperation of machinery, fluid, acoustics and thermodynamics is realized, and the process stability and service reliability of the joint are improved.

The invention relates to an adapter for connecting a actuator to a manually operable shut-off valve, in particular a ball valve, with a flange, with a fastening section formed on the flange for fastening the actuator and with a square adapter for transmitting a torque from the actuator to the control shaft of the shut-off valve. The flange has a flange ring and an insert arranged in the flange ring, the flange ring and the insert being arranged along the axis of the control shaft, in that the insert has an internal opening with an internal cross-section adapted to an external dimension of the shut-off valve, in that the insert is designed as a ring which is open in the azimuthal direction and can be compressed radially, that the flange ring and the insert have conical contact surfaces corresponding to one another and that screw means are provided for tightening the flange ring and the insert in the axial direction relative to one another in order to reduce the internal diameter of the internal opening. This solves the problem of specifying an adapter and a system of the type mentioned above, which extends existing installations and, in particular, is easy to position and assemble,

The utility model discloses an ultrasonic transducer. The ultrasonic transducer comprises a shell and a sealing assembly, the shell is provided with an accommodating cavity; the sealing assembly comprises a sealing piece and a locking part, the sealing piece is arranged in the containing cavity, and the locking part can be connected with the shell; in the state that the locking part is connected with the shell, the two opposite sides of the sealing piece abut against the locking part and the shell correspondingly, the locking part and the shell extrude the sealing piece in the axial direction, the sealing piece is subjected to compression deformation in the radial direction, and therefore the sealing piece can be locked. And the locking part extends in the radial direction of the shell to abut against the inner walls of the shell and the locking part.

The invention discloses a disposable safety syringe, which relates to the technical field of syringes, and comprises an empty cylinder, a push rod is arranged in the empty cylinder along the axial direction in a sliding manner, a piston attached to the inner wall of the empty cylinder is arranged at the end part of the push rod, and a nipple for connecting a needle is arranged at one end of the empty cylinder and is conical along the axial direction; an annular concave portion located in the middle is arranged on the inner wall of the nipple, an annular fixing piece is fixedly connected to the center of the end of the piston, a plugging piece is arranged in the annular fixing piece in a compressed mode, in the initial state, the plugging piece is stored in the annular fixing piece in the radial compression state, and the plugging piece is pushed to enter the annular concave portion after the piston abuts against the end of the hollow cylinder to be compressed. According to the disposable safety syringe, the movable plugging piece is arranged, and the plugging piece is pushed by the piston at the injection end stage of the syringe so as to enter the annular concave part and be unfolded, so that the interior of the nipple is plugged, the empty cylinder is prevented from being used for the second time, and the syringe is prevented from being reused.

The invention relates to a design method and device for a metal sealing structure of an underwater wellhead connector, a medium and equipment, and the method comprises the steps that S1, under the pre-tightening working condition, mechanical analysis is conducted on a driving piston, a locking block, a Christmas tree body and a metal sealing ring; s2, under the operation working condition, mechanical analysis is conducted on the wellhead connector body and the metal sealing ring; s3, according to the steps S1 and S2, obtaining a theoretical relationship between the operation contact stress of the metal sealing ring and the structural parameters, the radial compression amount and the working pressure; s4, establishing a sealing design criterion of the metal sealing ring according to the step S3; s5, establishing a strength design criterion of the metal sealing ring according to the step S3; s6, establishing a finite element simulation model of the sealing performance of the underwater wellhead connector; s7, analyzing the sealing performance of the metal sealing ring according to the finite element simulation model of the sealing performance of the underwater wellhead connector; and S8, obtaining the contact stress of the sealing surface of the metal sealing ring according to the steps S4, S5 and S7.

An integral motor pump (IMP) or turbine (IMT) applicable to a low temperature process liquid, such as liquid hydrogen, includes an impeller having an annular ring of permanent magnets attached thereto passing in axial proximity to a plurality of stator coils. The magnet ring is radially bounded by inner and outer compression sleeves having coefficients of expansion (CTEs) respectively less than and greater than the CTE of the magnets. Unequal thermal contraction of the compression sleeves, when cooled by the process liquid, applies radial compression to the magnet ring, overcoming centrifugal forces and maintains the magnets in radial compression, thereby preventing fracturing or pulverizing of the magnets. The magnet ring can be a monolithic ring with alternating magnetic regions, a ring of closely abutting magnets, or a ring of discrete magnets surrounded by a barrier material having a CTE equal to the magnet CTE.

The invention provides an interventional instrument adopting friction to assist positioning, the interventional instrument comprises a stent, the stent is of a frame structure with a hollow area, the stent has a loading state of radial compression and a release state of radial expansion, the interventional instrument further comprises a friction increasing component, an outer sealing film is arranged on the periphery of the stent, and the friction increasing component is arranged on the outer sealing film. The outer sealing film is a flexible skirt edge; in a loading state, the outer sealing film axially extends to shield the friction increasing component; and in the release state, the outer sealing film is axially stacked, and the friction increasing component is exposed. According to the interventional instrument, by arranging the friction increasing component and improving the mounting position of the friction increasing component, on one hand, a friction positioning mode is provided, on the other hand, adverse effects on loading are avoided, and potential safety hazards are eliminated as much as possible.

The utility model relates to the technical field of medical instruments, in particular to an artificial valve clamping piece and a conveying system. The artificial valve clamping piece comprises a clamping piece body, a connecting wire and a traction structure, the clamping piece body comprises a pipe body and a plurality of through holes formed in the pipe body, the pipe body is in a wave shape, and the two ends of the pipe body are closed to form a ring shape; the connecting wire penetrates into the tube body, and the end part of the connecting wire penetrates through the through hole in the tube body and then is suitable for being connected with the artificial valve; the traction structure comprises a traction wire, the traction wire is arranged in the pipe body in a penetrating mode through a through hole in the pipe body, and the traction wire is suitable for being connected with a conveying system. The clamping piece is of a periodic wave-shaped or fluctuating annular structure, can be fixed to the periphery of the outer surface of the artificial valve, can be radially compressed and expanded according to the size of the internal artificial valve, and is matched with the artificial valve to clamp the autologous valve leaflet, so that the artificial valve can be stably anchored at an accurate position without displacement, and meanwhile, the clamping piece can be used for clamping the autologous valve leaflet. The clamping device can reduce the occurrence risk of perivalvular leakage.