12results about How to "Reduce assembly stress" patented technology

The invention relates to the technical field of helicopter body structure assembly, and discloses a flexible reconfigurable tool for helicopter body structure assembly. The movable cross beam is mounted at the top of the frame; the movement module is mounted on the movable cross beam; a positioner and a drill jig are mounted on the movement module; the modularized bracket and all the sections of the fuselage are kept in a positioning state after the frame is taken off in the previous working procedure; the digital positioners are used for bearing the modularized brackets, and the multiple digital positioners can be linked to complete butt joint of all sections of the machine body; and the AGV is used for unloading and transferring all the sections of the machine body. The frame for general assembly of the fuselage solves the problems that a traditional frame for general assembly of the fuselage is complex in structure and low in flexibility and automation degree, can be quickly used for general assembly of fuselage structures of different models, effectively improves the utilization rate of tools, and has good market prospects and economic benefits.

The present invention discloses an array pressure measuring device, including: a piezoresistive sensitive chip, which is used to apply a reference pressure on its front side and an external gas pressure on its back side to generate a pressure difference; a circuit system, which is used to convert the generated pressure difference into an electrical signal output proportional to the pressure change and process and calculate; and a gas path system, which is used to provide gas pressure and act on both sides of the piezoresistive sensitive chip to generate the pressure difference. In the present invention, the alloy substrate and the piezoresistive sensitive chip are directly bonded with a packaging sealant, and the PCB board is located on both sides of the piezoresistive sensitive chip for electrical interconnection, which can reduce assembly stress and provide support for the precise control of the stress and temperature state of the piezoresistive sensitive chip, facilitate the disassembly and individual replacement of the piezoresistive sensitive chip or related circuit system components, and the multi-layer circuit chips are stacked and integrated. The internal integrated gas path system is conducive to the miniaturization of the entire pressure measuring device assembly.

The invention belongs to the technical field of aviation structure design, and particularly relates to a fixed covering cap structure with an adjustable outer edge step difference for an airplane and a mounting method thereof. The structure comprises a covering cap skin; the first covering cap supporting plate is provided with a turned-over edge, the first covering cap supporting plate is connected with an on-machine fixing structure through the turned-over edge, and a first mounting hole is formed in the first covering cap supporting plate; a flange is arranged on the second covering cap supporting plate, the second covering cap supporting plate is connected with an on-machine fixing structure through the flange, a second mounting hole is formed in the second covering cap supporting plate, and the second mounting hole is an oblong hole; one end of the main connecting angle sheet is connected with the covering cap skin, and the other end is connected with a second mounting hole of the second covering cap supporting plate; one end of the auxiliary connecting angle sheet is connected with the covering cap skin, and the other end is connected with the first mounting hole of the first covering cap supporting plate. The pneumatic outer edge tolerance requirements of gaps, step differences and the like between the covering cap and the peripheral structure can be met through rapid adjustment in the fixed covering cap installation process.

This disclosure provides a disassembly and assembly fixture, comprising: a connector having a first connecting end and a second connecting end; an assembly component disposed at the first connecting end, the assembly component having a first bearing structure, the first bearing structure including: a first positioning interface for bearing and positioning parts or parts combinations during assembly; and a disassembly component disposed at the second connecting end, the disassembly component having a second bearing structure, the second bearing structure including: a second positioning interface for bearing and positioning the assembly to be disassembled. The disassembly and assembly fixture of this application integrates disassembly and assembly auxiliary tools, and corresponding components can be replaced according to different transmission models or process requirements.

The invention provides a micro-channel heat exchange device based on high-entropy alloy connection and a preparation method and application of the micro-channel heat exchange device. According to the micro-channel heat exchange device, the connection quality of the joints of all layers of the micro-channel heat exchange device is improved, the tensile strength, the corrosion resistance and the hydrogen embrittlement resistance are improved, and the compactness, the corrosion resistance and the hydrogen embrittlement resistance of the fluid contact surface in the micro-channel heat exchange device are improved; the strength, the corrosion resistance and the hydrogen embrittlement resistance of the micro-channel heat exchange device are integrally improved, so that the micro-channel heat exchange device based on high-entropy alloy connection is suitable for places with high requirements for the space utilization rate and the reliability such as a hydrogen refueling station, and is particularly applied as a micro-channel heat exchanger of a hydrogen cooling system of the hydrogen refueling station.

This invention discloses a stator and a method for adjusting the stator's circular shape. The stator includes a stator support plate, a stator block, a stator adjusting block, and a positioning element. Each stator block is equipped with a circular stator adjusting block. During the process of the positioning element being inserted into the corresponding positioning hole of the stator support plate and the adjusting hole of the stator adjusting block, the circular stator adjusting block pushes the stator block to move, making the positioning hole and the adjusting hole coaxial. After the positioning element is inserted into the corresponding positioning hole and adjusting hole, the circular stator adjusting block can rotate within the corresponding receiving hole. In addition to moving with the stator block as a whole, the circular stator adjusting block can also rotate itself. Through its own rotation, the position of the center of the adjusting hole of the circular stator adjusting block remains unchanged during the overall movement of the stator block. Even if the adjustment direction and / or adjustment amount on both sides of the stator block are inconsistent, the center of the adjusting hole of the circular stator adjusting block always corresponds to the center of the positioning hole on the stator support plate, thereby reducing the assembly stress on the stator.

The invention discloses a high-precision low-stress assembly method for a space camera separation type truss, which comprises the following steps: carrying out multi-point support on an optical platform, integrally placing the optical platform on a marble platform, and carrying out high-precision positioning installation on the lower end surface of a truss rod and the optical platform; the gravity unloading force of the truss is calculated, a gravity unloading tool is designed and built, gravity unloading is conducted on the upper end of the truss, and gravity deformation of the truss in the state is compensated; a high-precision truss positioning tool is designed to position and install the separated truss, the gravity unloading force of the top end of the truss is monitored in the installation process, and it is guaranteed that the change of the force is within the allowance range; detecting and grinding a mounting surface formed at the top end of the truss to ensure that the planeness and parallelism of the mounting surface meet the design requirements; and the truss top plate and the top end face of the truss are installed, and the high-precision positioning tool is taken down. According to the technical scheme, the problem of residual stress deformation caused by the influence of gravity and assembly precision when the separated truss of the space camera is assembled and adjusted is solved.

This application provides a beamless direct-connection prefabricated energy storage cabin foundation structure, including multiple prefabricated piles, each prefabricated pile having an adjustable height seat at its upper end, a bottom frame at the lower end of the energy storage cabin, multiple connecting plates at the lower end of the bottom frame, and a base assembly at the lower end of each connecting plate. Each base assembly docks with each adjustable height seat, the adjustable height seat having a docking seat with an inner conical surface in the center of the docking seat, and the base assembly including a docking plate with an outer conical surface, the outer conical surface engaging with the inner conical surface. This solves the problems of complex structure, long force transmission path, long construction period, and difficulty in disassembly and assembly in traditional three-stage energy storage cabin foundation structures.

The utility model belongs to the technical field of screw drilling tools, and particularly relates to a high-speed transmission shaft assembly which comprises a transmission shaft, a transmission shaft sleeve and a transmission shaft sleeve. The upper TC bearing static sleeve is in interference fit with the transmission shaft; the lower TC bearing static sleeve is in clearance fit with the transmission shaft; the sealing oil injection device comprises a sealing piston located at the upper end of the transmission shaft and a U-shaped sealing ring; the V-shaped sealing ring, the spring and the pressurizing ring are positioned at the lower end of the transmission shaft; lubricating agents are injected into the transmission shaft assembly. According to the utility model, the reliability and the service life of the screw drill are obviously improved and prolonged through structural innovation. Firstly, a traditional upper TC bearing movable sleeve is omitted, a wear-resistant alloy layer is overlaid on the surface of the transmission shaft, the number of kinematic pairs is reduced, the failure problem caused by abrasion of the movable sleeve is avoided, and meanwhile the manufacturing cost is reduced.

This invention provides an assembly structure and method for a spherical tank, employing a combination of fixed support at the tank's waist with a planar flange and a simply supported top end, thus achieving freedom of movement along the tank's length. A planar flange is added to the waist of the spherical tank, which is then fixedly connected to the lower compartment of the spacecraft's transverse main structure, connecting the spherical tank to the spacecraft cabin. The simply supported top end installation involves an end cap bushing assembly fitted onto the top end of the spherical tank. This end cap bushing assembly connects to the upper compartment of the spacecraft's transverse main structure, constraining the lateral freedom of the spherical tank's top, while allowing for longitudinal freedom. This assembly structure offers advantages such as simple structure, light weight, ease of operation, and low assembly and structural internal stress.

The utility model discloses a hanging assembly applied to respiratory therapy equipment and the respiratory therapy equipment, the hanging assembly comprises a fixing part and a hanging part, the fixing part can be detachably installed on the respiratory therapy equipment, the hanging part is provided with a rotating part and a hanging part connected with the rotating part, and the hanging part is connected with the rotating part. The rotating part is rotatably mounted on the fixing part, so that the hanging part is provided with a storage position close to the respiratory therapy equipment and a hanging position far away from the respiratory therapy equipment, and when the hanging part is located at the hanging position, the hanging part can be connected with an external supporting structure to hang the respiratory therapy equipment. According to the hanging assembly, the breathing treatment equipment can be flexibly hung on non-planar supporting structures such as sickbed handrails and wall hooks through the rotatable hanging piece design, the breathing treatment equipment can be hung at a proper position in an environment without a placement condition, and the use convenience of a user is improved.

This utility model belongs to the field of clutch outer hub technology, and particularly relates to a high-strength outer hub. The outer hub body is provided with internal teeth for meshing with the friction plate assembly. The internal teeth can restrict the position of the friction plate assembly, ensuring that the friction plate assembly will not rotate during torque transmission. A connecting plate is inserted into one side of the outer hub body, adopting a split design. An insertion part is provided on the side of the outer hub body near the connecting plate, and a snap-fit ​​part is provided on the side wall of the connecting plate. The snap-fit ​​part is adapted to the insertion part, thereby realizing the fixed snap-fit ​​between the outer hub body and the connecting plate. Compared with the traditional one-piece structure, it can reduce weight, avoid stress concentration, improve torque transmission capacity, and enhance structural strength.