33results about How to "Reduce mechanical deformation" patented technology

A device is disclosed for superposed magnetic resonance imaging and positron emission tomography imaging. The device includes a magnetic resonance imaging magnet which defines a longitudinal axis (z); a magnetic resonance imaging gradient coil (2) arranged radially within the magnetic resonance imaging magnet; a magnetic resonance imaging HF coil (3) arranged radially within the magnetic resonance imaging gradient coil (2); and a multiplicity of positron emission tomography detection units arranged in pairs opposite one another about the longitudinal axis (z). The many positron emission tomography detection units (5) are arranged radially within the magnetic resonance imaging gradient coil (2) and can be inserted into the device and can be removed from the device along the longitudinal axis (z). A carrier tube (7) is preferably provided having a multiplicity of pockets (4), which in each case extend along the longitudinal axis, for accommodating at least one positron emission tomography detection unit (5).

A variable rotating capacitor or RotCo 5 that can be connected via a transmission line 3 to the dee 2 of a synchrocyclotron 1 so as to adjust a resonant frequency of the synchrocyclotron as a function of time and which comprises a cylindrical rotor 10 and a cylindrical stator 20 that are coaxial with the Z axis. The rotor comprises a plurality of circumferentially-distributed rotor electrodes 11 extending parallel to its rotation axis Z. The stator comprises a plurality of circumferentially-distributed stator electrodes 21 extending parallel to the rotation axis Z. Each stator electrode 21 consists of a single metal plate and all said plates are distributed over one and the same stator circumference 25. This makes it possible for the RF currents in the electrodes to be better distributed and thus reduces the local overheating.

The present invention also relates to a synchrocyclotron comprising such a RotCo.

A liquid crystal display device is provided in which, even when divided light guide plate blocks are thermally expanded or contracted as a result of a temperature change, the generation of clearances and mechanical deformations between such divided light guide plate blocks is prevented, making it possible to reduce the brightness unevenness of the liquid crystal display device. To realize the above feature, light guide plate blocks are arranged such that one or two of them are arranged in each horizontal row with only an upper side of each light guide plate block fixed to a chassis and, furthermore, such that the upper side fixed to the chassis of each light guide plate block is based on a center in the horizontal direction of the liquid crystal display panel so as to reduce the effects of thermal expansion and contraction of each light guide plate block.

In sophisticated semiconductor devices, the initial strain component of a globally strained semiconductor layer may be substantially preserved during the formation of shallow trench isolations by using a rigid mask material, which may efficiently avoid or reduce a deformation of the semiconductor islands upon patterning the isolation trenches. Consequently, selected regions with high internal stress levels may be provided, irrespective of the height-to-length aspect ratio, which may limit the application of globally strained semiconductor layers in conventional approaches. Furthermore, in some illustrative embodiments, active regions of substantially relaxed strain state or of inverse strain type may be provided in addition to the highly strained active regions, thereby enabling an efficient process strategy for forming complementary transistors.

The invention discloses a novel active air foil bearing. The bearing comprises a shaft sleeve, the PZTs, the flexible hinges, rigid push rods, precompression exertion devices, wave foil and top foil; the shaft sleeve is machined through wire cutting, three PZT mounting through grooves circumferentially and evenly distributed, the corresponding flexible hinges and the corresponding rigid push rods are obtained, the top ends of the rigid push rods are flush with the inner cylindrical face of the shaft sleeve, the PZTs are mounted in the through grooves, the corresponding precompression exertion devices are designed for the PZTs, the wave foil is formed by pressing of elastic materials, and is arranged on the shaft sleeve and the inner cylindrical faces of the rigid push rods, one end of the wave foil is welded to the inner round face of the shaft sleeve, and the other end of the wave foil is free. The top foil is arranged on the wave foil in a covering manner. Through control over power supply signals of the PZTs, the PZTs mechanically deform, the flexible hinges are enlarged to deform, and are supported through the rigid push rods to be attached to the wave foil on the push rods and the inner wall of the shaft sleeve, a gap between a bearing and a supporting rotor is changed, the wedge space is increased, the crossed coupling effect is weakened, the bearing dynamic pressure effect is enhanced, the rigid characteristic of the bearing is improved, and finally the aims of actively controlling the rigidity characteristics of the bearing and improving the stability of the bearing are achieved.

The invention discloses a rotary cutoff device for an evaporating pipe. The rotary cutoff device comprises a motor, a rotary guide body, a blade, a pneumatic radial pushing mechanism, a cutting supporting mechanism and a rotary air supply mechanism. The rotary guide body is of an integral structure composed of a pipe body and an annular disc, and a pipe hole is formed in the axial direction of the center. The rotary guide body can be driven by the motor to rotate. The pneumatic radial pushing mechanism, the cutting supporting mechanism and the blade are arranged on the rotary guide body and can rotate along with the rotary guide body. The pneumatic radial pushing mechanism is used for driving the blade to move on the annular disc in the radial direction. The rotary air supply mechanism is used for providing compressed air for work of an air cylinder when the air cylinder rotates along with the rotary guide body. When the rotary cutoff device works, the blade rotates around the axis of the evaporating pipe, the evaporating pipe is cut off, and therefore when the evaporating pipe is cut off, a cutting opening is flat. The blade is pushed to the center of the evaporating pipe and faces the inner side of the evaporating pipe even though burrs are generated, and connecting and mounting cannot be influenced after and before evaporation.

This invention relates to one magnetic socket device, which comprises socket, supportive bar and micro adjuster and is characterized by the following: the micro adjust probe is set on beam with two parts fixed on one slide cover with each one covered on supportive bar top end and two down end fixed on one socket; the base socket is composed of seat, spiral coil, aluminum coils skeleton and connection screw nail; the spiral coil is around aluminum skeleton on the skeleton chamber fixed by connection nail with two ends connected to wire through wire hole and power.

An axial passive magnet bearing system utilizes the friction-less characteristic of non-contact type permanent magnet bearing to minimize the disadvantages induced by frictions. For example, both the energy and material loses of the mechanical bearing. Two permanents magnet are made of permanent magnet materials and positioned over two opposite surfaces of two mechanical structures, where mechanical bearing(s) is located therebetween. Hence, the magnetic force between the two magnets can improve some disadvantages among the two mechanical structures and the mechanical bearings, such as friction and energy loss.

A tire assembly with integrated electronic components includes a tire structure and an integrated electronics assembly, which preferably includes at least a radio frequency (RF) device and a multi-frequency antenna that enables wireless communication in at least first and second resonant frequency bands. Such multi-frequency antenna further comprises at least first and second antenna wires connected to the RF device, thus facilitating the transmission of RF signals which may include information such as tire identification information or measured condition information such as tire temperature, pressure, and other characteristics. The first and second antenna wires preferably function together as at least two dipole antennas, for example, two half-wave dipole antennas or one half-wave dipole antenna and one three-half-wave dipole antenna.

The invention relates to vacuum equipment for vacuum welding or annealing of a semiconductor chip, and the equipment comprises a vacuum cabin and a vacuum cabin upper cover, and further comprises a translation mechanism, wherein the translation mechanism is connected with the vacuum cabin upper cover and can drive the vacuum cabin upper cover to horizontally move relative to the vacuum cabin; Theequipment also comprises a lifting mechanism which is connected with the vacuum cabin upper cover and can drive the vacuum cabin upper cover to move up and down relative to the vacuum cabin. The vacuum chamber upper cover can move up and down and horizontally relative to the vacuum chamber, the opening and closing door does not occupy the position of an input port, robot automatic feeding is moreconvenient, products can be vertically and automatically input, the top space of a welding area in the vacuum chamber can be increased, robot or mechanical arm automatic feeding and discharging are convenient, and the problem that horizontal input of heavy-load products easily causes scratching of the jig carrying table is effectively solved.

The invention relates to an arc-shaped double-clamp system required by high-frequency vibration of a steel pipe pile. A cross beam is fixedly connected to a vibrating hammer through a bolt, two arc-shaped clamps are embedded into a cross beam slot and can move bidirectionally in the cross beam slot to adjust the separation distance for meeting the clamping demands of steel pipe piles with different diameters, the two arc-shaped clamps with the adjusted separation distance are fixedly connected to the cross beam through bolts, and the two arc-shaped clamps are in reinforced connection to through a steel connecting plate and a bolt, so that the adjusted arc-shaped double clamps do not generate displacement when the vibrating hammer vibrates at a high frequency. The system provided by the invention is simple to operate. As an arc-shaped fixed clamp piece and the steel pipe pile are tightly laminated, a hydraulic retractable clamp piece can move freely to clamp and loosen the steel pipe pile, and the double clamps are locked in relative positions through a limiting steel plate and the bolt, so that the mechanical deformation at the end port of the steel pipe pile during high-frequency pile sinking is greatly reduced, and therefore, the steel pipe pile butt joint quality is effectively ensured, and meanwhile, the field construction steps and labor force investment are reduced, and the construction cost is lowered.

The invention relates to the technical field of sock production, and discloses an efficient multifunctional sock turning machine. The machine comprises a main body; an inner cavity is formed in the main body; a low-speed motor is installed in the inner cavity; a collecting box is fixedly connected to the driving end of the low-speed motor; sock placing sleeve pipes are fixedly connected to the side edge of the top of the collecting box at equal intervals; a box door is installed on the side surface of the collecting box; a first limiting ring and a second limiting ring are fixedly connected to the upper surface of the main body; the interiors of the first limiting ring and the second limiting ring are jointly connected with a sock turning rod in a sliding mode; an air blowing pump is installed in the main body; a transmission mechanism is arranged above the low-speed motor; a sock turning mechanism is installed in inner cavity; and a sock taking-off mechanism is arranged above the air blowing pump. According to the invention, the effect of rapidly turning socks is achieved; an operator is far away from a pipeline opening of the air blowing pump when placing the socks, so that the dangerousness to the operator is reduced; and during rotation, the relatively thin sock turning rod does not make contact with a sock placing sleeve, so that the mechanical friction of equipment is reduced.

The invention relates to the technical field of machining, in particular to a material breaking device of a punching machine for round steel workpieces. The material breaking device of the punching machine comprises a base and an upper die cavity arranged above the base, an adjusting seat and a lower die cavity with an inner circular tool are arranged on the base, and the lower die cavity is fixed on the base through locking bolts. A tool is arranged in the upper die cavity. The material breaking device of the punching machine is simple in structure, convenient to operate, high in machining precision, and not prone to causing deformation of workpieces, and when mass processing is carried out, work efficiency can be effectively improved, and labor intensity of workers can be reduced.

The invention provides a method for manufacturing a real coal two-dimensional microfluid model. The method comprises the following steps of: 1, scanning a columnar coal sample by using a CT (Computed Tomography) instrument to obtain a real fracture network; 2, a wire cutting machine is adopted, and blocky coal rock of 7.2 * 7.2 * 1.5 cm is cut on the large coal sample; 3, placing the real coal rock block on a silica gel grinding tool with the inner wall size of 8 cm * 8 cm * 2 cm, and pouring the epoxy resin glue until the epoxy resin glue is solidified; step 4, inputting the real fracture network or the simplified fracture into a laser marking machine, and etching the fracture on the surface of the blocky coal sample; and step 5, manufacturing a PET film of 7.2 * 7.2 cm, adding a silica gel coating with a nanometer thickness on one surface of the PET film through a coating process, and then bonding the PET film with the coal rock through the silica gel coating, so that the accuracy and controllability of the experiment are ensured, and the PET film and the nanometer silica gel coating have excellent light transmittance, so that the research on the basic theory of coal bed gas migration is facilitated. The method has important significance in improving the coal bed gas recovery ratio.

The invention discloses a preparation process of a copper-based powder contact. The preparation process comprises the following steps: S1, performing primary powder mixing; S2, performing filtering and drying; S3, performing primary pressing; S4, performing primary sintering; S5, performing cooling: after the primary sintering is finished, introducing room-temperature rare gas into a furnace for 30-40 minutes, then changing the temperature of the rare gas filled into the furnace, gradually reducing the temperature of the rare gas to 20 DEG C from 100 DEG C in an equal difference manner at a difference value of 10 DEG C, maintaining the filling time of the rare gas at each temperature gradient for 5 minutes, then taking out a blank ingot after the primary sintering, and cooling the blank ingot through a cooling device; S6, performing secondary pressing; S7, carrying out secondary sintering; and S8, performing rolling, wiredrawing and blanking. The invention also discloses a relay formed by the contact prepared by the preparation process. According to the method, the professional cooling step is added in the traditional metal powder metallurgy process, so that the blank ingot subjected to primary sintering can be completely cooled after the cooling step, and the blank ingot is prevented from generating cracks during secondary pressing to influence the property of the contact.

The invention discloses a modular hot-pressing shaping mechanism, which comprises a fixed frame, wherein a lifting channel is formed in the vertical direction of the fixed frame; a hot-pressing upperdie structure is located above the lifting channel; a hot-pressing lower die structure comprises a hot-pressing lower die assembly, a lower die mounting base plate and a lifting oil cylinder; the hot-pressing lower die assembly is located on the lower portion of the lifting channel; and the lifting oil cylinder drives the hot-pressing lower die assembly to ascend or descend in the vertical direction, so that die assembly or die opening is achieved between the lower die core and the upper die core. Modular manufacturing and mounting can be achieved, the difficulty of machining, manufacturing, mounting, debugging and maintaining can be effectively lowered, and the comprehensive cost of manufacturing and using can be effectively lowered. As a complete and independent hot-pressing shaping working module with excellent performance, the hot-pressing shaping working module not only can automatically, integrally and independently complete the hot-pressing shaping process of pulp molding, but also can be flexibly integrated into various sets of large multi-station pulp molding production equipment according to actual requirements by serially and parallelly combining a plurality of modular units.