70results about How to "Reduce connection links" patented technology

The invention discloses a beam and column connecting member which comprises an integrally-formed beam and column connecting member body, upright splicing heads and a horizontal support joint, wherein the beam and column connecting member is formed through casting; and a building frame structure comprises the beam and column connecting member, an upright spliced and fixed with the upright splicinghead, and a beam supported and fixed with the horizontal support joint. An installing method comprises the steps of: installing the upright spliced and fixed with the lower upright splicing head, installing the beam and column connecting member, and installing the beam. The invention has the advantages of greatly reducing connecting links of fastening connection or welding of bolts and the like, greatly reducing defects of poor stress and weak connection of connecting positions, caused when stress is excessively concentrated on beams and column or connecting positions among the beams, therebygreatly increasing installing efficiency and seismic resistance function, service life and use safety of a building frame structure. The beam and column connecting member can be massively pre-produced in a standardized manner.

The invention provides a power supply system of a partial discharge test used for an extra-high voltage transformer. The power supply system comprises an electromotor 1, an intermediate frequency generator 2, a control cabinet 3, a power supply wire inlet 4, a generator wire outlet 5, a protective cabinet 6, a low-voltage compensating reactor 8, an intermediate transformer 9, a compensating reactor 10, a test object 11, and the like; and all the device are integrally arranged in a container cabinet made of metal. The system provides the stable and reliable power supply system with little background interference for an on-site induced voltage test and the partial discharge test of the extra-high voltage transformer, and guarantees to meet the requirement for testing the test object of the extra-high voltage transformer.

The invention relates to a differential electric driver and belongs to the technical field of differential electric drivers. A split turbocharged speed reducer differential electric driver comprises a motor shell and a motor shaft, and is characterized in that: the driver also comprises a shell of a reduction booster; a shell of a differential mechanism in the shell is fixedly connected with the shell of the reduction booster through a bearing; the periphery of the motor shaft is provided with a main driving gear fixedly connected therewith; the main driving gear is in transmission connection with a main driving planetary gear arranged on the periphery of the main driving gear through a main driving planetary gear shaft; the main driving planetary gear is meshed with a turbine main reduction gear fixedly connected with the shell of the differential mechanism; and the turbine main reduction gear is connected to a speedometer gear sensor through a speedometer driving ring gear arranged on one side thereof. The differential electric driver improves the output torque of an axle shaft of the differential mechanism, greatly improves climbing capacity of an electrocar, changes the phenomenon that the prior electrocar has high power consumption when starting, decreases multiple connecting links, reduces the noise of the electrocar, and leads the development direction of future electrocars.

The invention discloses a gas insulated switchgear, including at least two isolation units and two earth units, breaker units connect with the isolation units and the earth units, and a shell contains insulating air and the breaker units, and the axis of the shell is in horizontal direction. The described two isolation units and the earth units are set on both sides of the breaker unit, which are the composite isolation-earth switch base on isolation function and earth function, and it achieves a mechanical interlock about the isolation function and earth function. The two isolation-earth switches are placed on each side of the two isolation-earth switch containers, and the top of each container vertically connects a metal airtight container and an insulation sleeve, and the insulation sleeve is set vertically. The isolation-earth switch connects to a conductor overhead through the insulation sleeve on the left and connects to a bus conductor of electricity overhead through the insulation sleeve on the right.

The present invention relates to a high stability multi-angle and multi-freedom satellite releasing and bearing apparatus of a space remote sensing camera. According to the present invention, a clamped connection point is arranged on an installation foot position for installing an optical remote sensing camera and a satellite, other connection points are provided with slice type flexible hinge structures according to line connecting directions of the connection points and the clamped connection point, such that a quasi-static clamped support manner of the remote sensing camera relative to a satellite installation plate is formed, the deformation and the uninstallation of the satellite installation plate by the remote sensing camera are realized, the slice type flexible hinge has high structure rigidity in the in-plane direction of the slice. With the present invention, the coupling effect of the camera structure and the thermal deformation of the satellite large base plate is effectively reduced, the sufficient whole support rigidity can be provided for the camera, such that the problem of imaging quality of the space remote sensing camera due to the thermal deformation of the satellite base plate is solved so as to ensure the imaging quality and the imaging stability of the space remote sensing camera after the space remote sensing camera enters the orbit; the method has characteristics of simple structure design, compact configuration, less connection steps and high reliability.

A beam-column connecting component comprises an integrally formed beam-column connecting component body, an upright socket which needs to be inserted and fixed to an end portion of an upright in a direction perpendicular to the horizontal plane and protrudes from the beam-column connecting component body in the vertical direction, and a horizontal supporting joint which directly supports a cross beam parallel to the horizontal plane and protrudes from the beam-column connecting component body in the horizontal direction. The upright socket comprises two symmetrical U-shaped blocks vertically protruding from the beam-column connecting component body and having openings toward two sides, round tables are formed on the bottom planes of U-shaped grooves of the two U-shaped blocks; a reinforcing rib is connected between the round tables; and a threaded through hole is formed in each round table. The beam-column connecting component has the advantages that fastening connection or welding and the like are greatly reduced, and the defects of poor stress and weak connection at the connection position due to overconcentration of stress on the connection position between the beam and the column or between the beams are greatly reduced, so that the mounting efficiency, the anti-vibration function and the use safety of the building frame structure are greatly improved, and the service lifeof the building frame structure is prolonged; and the beam-column connecting components can be produced in advance on a large scale and in a standardized manner.

A top beam connecting component comprises a top beam connecting component body, two top-beam oblique sockets projecting from the top beam connecting component body slantwise and downwards and in an inversed V form, and a horizontal supporting joint horizontally projecting from one side face or two opposing side faces of the top beam connecting component body. Each top-beam oblique socket is provided with a side propping face which is propped against a top beam inserted into the top-beam oblique socket up and down and back and forth; and the horizontal supporting joint is provided with a crossbeam-supporting horizontal plane for directly supporting a cross beam. The top beam connecting component has the following advantages that: no upright is needed for supporting at the connection positions of the top beam, the cross beam and the top beam connecting component, so that the connection links of fastening connection or welding by means of a bolt and the like can be greatly reduced and the defects of poor stress and weak connection at the connection position due to over concentration of stress on the connection position between the beam and the column or between the beams are greatlyreduced; therefore, the mounting efficiency, the anti-vibration function and the use safety of a building frame structure are greatly improved, and the service life of the building frame structure isprolonged; and the beam-column connecting components can be produced in advance on a large scale and in a standardized manner.

The invention discloses a method for manufacturing a lithium ion battery lug, and the method comprises the following steps: 1) manufacturing a positive pole; 2) manufacturing a negative pole; 3) stacking up pole cores; 4) carrying out thermocompression bonding on a lug; 5) carrying out thermocompression recoatin on the lug; and 6) packaging the obtained product. By using the method disclosed by the invention, the internal connection resistance of the lug can be effectively reduced from 1.2 m ohm (an original internal resistance) to 0.85 m ohm; and meanwhile, the rate discharge performance of the lug is greatly improved, through taking a discharge capacity of 0.5 C as a standard capacity, 1 C discharge capacity is increased to 100% from 99.6%, 5 C discharge capacity is increased to 99.6% from 97.3%, and 10 C discharge capacity is increased to 99.4% from 92.1%.

The invention provides a drive joint suitable for deep-space high-low-temperature environment. The drive joint is characterized by comprising a step motor, a short cup type harmonic reducer, a rotary transformer, a housing end cover, a housing, an output shaft, an angular contact bearing, a disc spring, an inner shaft sleeve, an outer shaft sleeve, a stop nut and a bearing end cover. After being amplified by the reducer, motor torque drives a performing mechanism to rotate through the output shaft, the rotary transformer is mounted on the output shaft for directly detecting an output angle of the drive joint, the torque transmission path is the shortest and connecting links are fewest, so that the drive joint has the advantages of being wide in applicable temperature range, high in reliability, small in return difference, small in axial jump, great in transmitted torque and the like.

The invention discloses a rotational locking joint, which comprises a fixed hinge joint (1), a movable hinge joint (2) and a connection release mechanism. The inner sides of the fixed hinge joint (1) is connected with the inner side of the movable hinge joint (2) through a fixed connecting axle (6), and the outer sides are connected through the connection release mechanism; a chip-type actuator spring (5) is connected with the outer side of the fixed hinge joint (1) through a lower connecting axle (7), and the other end of the chip-type actuator spring (5) is connected with the outer side of the movable hinge joint (2) through an upper connecting axle (8); when the rotational locking joint is locked, the chip-type actuator spring (5) is in a bent strained condition, and after being unfolded to a destination operating condition, the chip-type actuator spring (5) is in a stretching condition. When the rotational locking joint is locked and unfolded, the strained condition of the chip-type actuator spring (5) is reasonably utilized, compared with the prior product, the connection links during the executive process are reduced, the structural weight is reduced, the system reliability is enhanced, and simultaneously the component has large bearing capacity.

The invention relates to the improvement of a speed-increasing gearbox of a wind driven generator, which is characterized in that: a gear transmission has 3 to 4 stages, wherein the last stage is a planetary gear transmission; the former stages are all double-circular-arc cylinder herringbone spiral gear transmissions. Compared with the conventional generally-used speed-increasing gearbox which mainly uses the planetary gear transmission, because the low-speed stages (1 to 3 stages) adopt double-circular-arc cylinder herringbone spiral gears with high transmission efficiency and a subsequent stage adopts the planetary gear transmission, the advantages of the double-circular-arc cylinder herringbone spiral gear transmission and the planetary gear transmission are combined together, thus the effective one-off life is long, the transmission efficiency is high and the volume is small; and moreover, the double-circular-arc cylinder herringbone spiral gear is used for the speed-increasing gearbox of the wind driven generator for the first time.

An airplane body wallboard pressurizing test device relates to the technical field of airplane strength test device designing. Long bottom beams are parallely and fixedly arranged on a same plane. Short bottom beams are fixedly arranged on the long bottom beams and are perpendicular with the long bottom beams; a square steel frame is fixed on the short bottom beams and furthermore the shape of the square steel frame matches a supporting bottom box. Each connecting part comprises a small pulling plate, a middle pulling plate, a large pulling plate, a long pulling plate, double ears, a load equalizer and a single ear; wherein the small pulling plate, the middle pulling plate, the large pulling plate, the long pulling plate, the double ears, the load equalizer and the single ear are successively connected. A tested member covers and presses the supporting bottom box, and furthermore the tested member is connected with a supporting part through the connecting part. The tested member is connected with a hydraulic servo control device and inflates the tested member for realizing a pressurizing test on the airplane body wallboard. The airplane body wallboard pressurizing test device provided by the invention has advantages of saving testing space, reducing weight of the test device; effectively ensuring uniform load bearing in an adaptive loading manner; reducing a connecting process, effectively increasing loading frequency, realizing uniform boundary load, saving space and realizing repeated use.

The present invention relates to a transformer leakage testing device, belonging to the field of the transformer production testing technology. The transformer leakage testing device comprises a tee-junction pipeline, an attachment joint and a sealing washer; a rotary valve is arranged at the upper channel of the tee-junction pipeline; a pressure gage is installed at the left channel of the tee-junction pipeline, and a thread air gap connected with an air compressor is arranged at the right channel of the tee-junction pipeline; and the lower end of the tee-junction pipeline is connected with the pressure testing port of a transformer box through the attachment joint. The transformer leakage testing device is simple in connection structure and good in sealing performance, is able to accurately control the testing pressure, and is easy to inject air pressure and exhaust gases by connecting a tee-junction pipeline structure with a rotary valve, a pressure gage and a thread air gap. Besides, the thread air gap and the tee-junction pipeline are integrated to form a one-body structure, so that the connection links are decreased, the airtight of the leakage testing device itself is ensured, the accuracy of the sealing test is greatly improved, and phenomenon is avoided that erroneous judgements are easy to occur in the prior art, therefore the production efficiency is improved.

The invention discloses a multi-channel high-pressure gas mechanical reversing mechanism. The multi-channel high-pressure gas mechanical reversing mechanism comprises a valve casing with a cylindrical through cavity, and a cylinder valve element plugged in the cylindrical through cavity of the valve casing in an interval mode, wherein multiple air outlets are evenly formed in the upper portion of the valve casing in the circumferential direction; each air outlet is fixedly connected with an air outlet pipe; an air inlet is formed in the lower portion of the peripheral surface of the valve casing; three annular grooves are formed in the peripheral surface of the cylinder valve element at intervals from top to bottom; an air outlet channel is formed at the position, between the first annular groove and the second annular groove, of the peripheral surface of the cylinder valve element and located at the height position of the air outlets; the air outlet channel extends to the axis position of the cylinder valve element; an air guide annular groove is formed in the position, between the second annular groove and the third annular groove, of the peripheral surface of the cylinder valve element and located at the height position of the air inlet; air inlet channels are formed in the bottom of the air guide annular groove in the radial direction; an air guide channel communicated with the air outlet channel is upwards formed in the junction of the air inlet channels. The multi-channel high-pressure gas mechanical reversing mechanism has the advantage that the purely mechanical structure is adopted, so that the fault problems that a traditional solenoid valve needs to be supplied with power and is switched uninterruptedly are solved.

The invention discloses a semiconductor strain balance applied to a pulse wind tunnel. The balance sequentially comprises a model connecting section, a first combined measuring element, an axial forcemeasuring element, a second combined measuring element, an accelerometer mounting section, a balance supporting rod and a supporting section from front to back. Aiming at the characteristic of shorteffective time of a pulse wind tunnel, the balance adopts a semiconductor strain balance form, and meanwhile, the balance and the supporting rod are designed into a whole, so that middle parts are reduced, and the rigidity of the balance is enhanced. According to the balance, on the basis of a three-piece beam type combined measuring element, a side piece beam is divided into an upper piece beam and a lower piece beam which are respectively used for measuring a lateral force, a yawing moment and a rolling moment, so that the sensitivity and the measuring precision of the rolling moment are improved.

The invention discloses a beam and column connecting member which comprises an integrally-formed beam and column connecting member body, upright splicing heads convexly arranged on the beam and column connecting member body along a vertical direction, and a horizontal supporting joint convexly arranged on the beam and column connecting member body along the horizontal direction, wherein each upright splicing head comprises two symmetrical parallel U-shaped blocks vertically and convexly arranged on the beam and column connecting member body and provided with openings towards two sides, round tables are arranged on planes at the bottoms of U-shaped grooves of the U-shaped blocks, reinforcing ribs are connected between the round tables, and threaded through holes are arranged in each round table. The invention has the advantages of greatly reducing fastening connection or welding and the like, and greatly reducing the defects of poor stress and weak connection of connecting positions, caused when stress is excessively concentrated on beams and column or connecting positions among the beams, thereby greatly increasing installing efficiency and seismic resistance function, service life and use safety of a building frame structure. The beam and column connecting member can be massively pre-produced in a standardized manner.

The invention relates to a safety early warning system and particularly relates to a safety early warning system capable of rapid deployment. The system includes a crowd early warning front end, a fire detection front end, a face identification front end and a background monitoring terminal. The crowd early warning front end, the fire detection front end and the face identification front end are integrated on corresponding support-type bases respectively. The background monitoring terminal is an integrated all-in-one machine which is connected with the crowd early warning front end, the fire detection front end and the face identification front end wirelessly. The system integrates the crowd early warning front end, the fire detection front end and the face identification front end on the support-type bases and at the same time, integrates the background monitoring terminal on the all-in-one machine so that deployment can be completed without relying on hardware such as walls of the field and electric poles and the like and the early warning system also adopts a wireless connection method to substitute the prior wired connection method so that the installation and deployment time of the hardware of the early warning system is saved significantly and rapid deployment of the early warning system is further realized.

The invention relates to a connecting element for building framework structures, which comprises an integrally formed connecting element body and a plug head convexly arranged on the connecting element body, wherein the plug head comprises two symmetrical side-by-side U-shaped convex parts convexly arranged on the connecting element body, openings of the U-shaped convex parts are opposite, and the distance between corresponding surfaces of the two position limiting convex parts is matched with the vertical part of H-shaped steel or I-shaped steel with the end part being processed into a T shape. The connecting element for the building framework structures has the advantages that the fastening connection or the welding and the like are greatly reduced, and the defects of poor stress and weak connection of connecting positions caused by excessive stress concentration in the connecting positions between beams and columns or between beams are greatly reduced, so the installation efficiency, the earthquake resistance function and the use safety of the building framework structures are greatly improved, the service lives of the building framework structures are greatly prolonged, and beam and column connecting elements can be produced in a standardized mass production way in advance.

The invention belongs to engines technical field, particularly an engine multi-oil channel split type machine body structure, comprising a cylinder block, a crankshaft case and a bearing cap. The cylinder block and the crankshaft case are positioned by a cylindrical pin and connected by bolts. The crankshaft case and the bearing cap are positioned by a rabbet and connected by bolts. The cylinder block is an integral structure, including a distribution column compartment, a cylinder hole and a water chamber, which are linked by an integral casting mode. The crankshaft case is fastened at the support end A plane under the cylinder hole of the cylinder block. The bearing cap is connected with the crankshaft case. Three longitudinal oil passages including an auxiliary oil passage, a distribution auxiliary oil passage and a cooling jet oil supply passage are arranged on the cylinder block. The structure has small volume, good casting process and large material selectivity. The complete structure is with great stiffness; the cylinder sealing reliability is high; multi-oil channels have good lubrication and cooling effect.

The invention relates to the technical field of pump equipment, in particular to an intelligent permanent magnet zero-leakage pump. The intelligent permanent magnet zero-leakage pump comprises a zero-leakage pump body, wherein the bottom of the zero-leakage pump body is equipped with a base; a permanent magnet synchronous motor stator and an intelligent variable-frequency controller are mounted inthe zero-leakage pump body; the zero-leakage pump body comprises a flow radiator, an isolating sleeve, a synchronous rotor, a bearing, a rotary shaft, an impeller and a pump shell; the permanent magnet synchronous motor stator comprises a heat dissipation housing and a stator which is embedded with three groups of coils; the intelligent variable-frequency controller comprises a control box; and aheat dissipation fan and a plurality of heat dissipation fins are mounted on the control box. The intelligent permanent magnet zero-leakage pump is simple in integral structure, cancels a magnetic shaft coupler needed for a conventional magnetic pump, adopts an intelligent control module of the intelligent variable-frequency controller to safely monitor a working state of the motor and the pump,upgrades original switch type control to be intelligent protection type control, reduces a connecting link, adopts a permanent magnet synchronous motor to improve work efficiency, improves integral system efficiency, and saves energy consumption of a power grid.

The scalable chip architecture of tile-type TR component millimeter wave proposed by the invention aims to provide the universal, reliable, flexibly extensible and low-cost chip architecture with highfunctional density and channel integration density. The invention is realized by the following technical solutions: four paths of amplitude-phase modulation channels of the amplitude-phase modulationchip are bilaterally symmetric, the one-divide-into-four power distribution synthesis network disposed in the center of the amplitude-phase modulation chip is connected to the amplitude-phase modulation unit corresponding to the four paths of amplitude-phase modulation channels, the one-divide-into-four power distribution synthesis network is connected to the radio frequency port of the docked common port of the antenna beamforming network by the connected common channel gain compensation unit, the opposite sides of the radio frequency port are provided with digital function units, and the four symmetric amplitude-phase modulation units are symmetrically connected to the low-noise / power amplification unit in the multifunctional chip respectively through the four-channel radio frequency ports correspondingly connected at left and right sides of the amplitude-phase modulation chip, thereby forming an expandable basic unit that communicates with respectively corresponding sub-array antenna interconnecting radio frequency interfaces.

The invention discloses a double-oil-outlet speed variable gear pump, which belongs to the technical field of hydraulic pumps. The problem to be solved is to provide a low-pressure double-oil-outlet speed variable gear pump which is suitable for a bulldozer, is provided with two oil outlets and an oil inlet and has high flow. The technical scheme is that: a front pump assembly and a rear pump assembly are connected with each other through a front pump body; an internal spline is arranged on the connection part between a rear pump driving gear and a front pump driving gear, and is used together with an external spline of the front pump driving gear in a matching way; a front and rear pump shared general oil inlet is formed on the front pump body; and a front pump oil outlet and a rear pump oil outlet are formed on the end face of a front cover assembly respectively. The pump can be widely applied to speed-variable gear pumps.

The invention provides a connector for building frame structures. The connector comprises an integrally formed connector body and a support joint arranged on the connector body in a protruding manner, wherein the support joint comprises a side convex part protruding along the horizontal direction from the side of the connector body; two symmetrical limiting convex parts parallel with each other horizontally extend upwards from the top surface of the side convex part and then are bent outwards; and the distance between the opposite surfaces of the two limiting convex parts is matched with the vertical part of H section steel or I section steel with T-shaped ends. The connector has the following advantages: fastening connection or welding is greatly reduced and the defects that the connection position between a beam and a column or between beams has poor stress effect and poor connection because the stress is excessively concentrated on the connection position are greatly reduced, thus greatly improving the installation efficiency, seismic resistance function, service life and use safety of the building frame structures; and the connector can be produced in mass in advance in a standard manner.

The invention relates to a high-speed helicopter transmission system, which belongs to the field of space flight and aviation, comprises a main rotor transmission subsystem and a propeller transmission subsystem, adopts a pure bevel gear train in structure, and consists of a propeller horizontal reversing bevel gear pair, a main rotor vertical reversing bevel gear pair and a two-wing horizontal reversing bevel gear pair. Power is input through a helicopter main reduction shaft. Power is transmitted through two paths to drive the main rotor and the two-wing propellers respectively, wherein onepath is transmitted from the main reduction shaft to the propeller horizontal reversing bevel gear pair and the two-wing propeller bevel gear pair and then horizontally reverses through the two-wing propeller bevel gear pair to drive the propeller, and the other path is transmitted from the main reduction shaft to the main rotor vertical reversing bevel gear pair and then drives the main rotor torealize power output. While two functions of driving the main rotor wing by vertical reversing of power and driving the propeller by horizontal reversing are realized, the structure is compact, the weight is light, the transmission efficiency is high, the stability is good, the stable driving capability is realized, and the medium-high speed transmission is realized.

The invention relates to a test head used for testing performance of a radio frequency coaxial connector. The test head solves the technical problems that an existing connector is complex in structure, multiple in connecting link, large in size, high in cost and the like. The test head is characterized by comprising an outer shell (4), two insulators (2 and 3) are arranged in an inner cavity of the outer shell (4), concentric through holes are formed in the centers of the insulators, a double-headed inserting needle (1) is arranged in the through holes, one head of the inserting needle (1) is connected with the radio frequency coaxial connector to be tested, the other head of the inserting needle (1) is connected with test equipment; a wire thread insert (5) is sleeved on an outer wall of the outer shell (4), an annular groove is formed in the outer wall of the outer shell (4), an annular groove corresponding to the annular groove formed in the outer wall of the outer shell (4) is formed in an inner wall of the wire thread insert (5), and a clamping ring (6) is arranged between the annular groove formed in an inner wall of the wire thread insert (5) and the annular groove formed in the outer wall of the outer shell (4). The test head is simple in structure, few in connecting link and convenient to use. Meanwhile, due to the fact that the test head has a little effect on a test process, error is minimum and obtained test results are closest to actual work technical parameters of the radio frequency coaxial connector when the technical performance of the radio frequency coaxial connector is tested.

The present invention relates to a high stability multi-angle and multi-freedom satellite releasing and bearing apparatus of a space remote sensing camera. According to the present invention, a clamped connection point is arranged on an installation foot position for installing an optical remote sensing camera and a satellite, other connection points are provided with slice type flexible hinge structures according to line connecting directions of the connection points and the clamped connection point, such that a quasi-static clamped support manner of the remote sensing camera relative to a satellite installation plate is formed, the deformation and the uninstallation of the satellite installation plate by the remote sensing camera are realized, the slice type flexible hinge has high structure rigidity in the in-plane direction of the slice. With the present invention, the coupling effect of the camera structure and the thermal deformation of the satellite large base plate is effectively reduced, the sufficient whole support rigidity can be provided for the camera, such that the problem of imaging quality of the space remote sensing camera due to the thermal deformation of the satellite base plate is solved so as to ensure the imaging quality and the imaging stability of the space remote sensing camera after the space remote sensing camera enters the orbit; the method has characteristics of simple structure design, compact configuration, less connection steps and high reliability.

The invention discloses an electromagnetic braking cooperation mechanism self-locking navigation inertial unit transposition locking mechanism, and belongs to the technical field of space navigation control, and aims to solve the problems in the prior art that a mechanism toothed disc is stuck and cannot be tested continuously, the failure rate is high, the mechanism test error is large, the mechanism state cannot be freely switched, and the test efficiency is low. The electromagnetic braking cooperation mechanism self-locking navigation inertial unit transposition locking mechanism comprises: a mechanism frame; a transmission shaft system positioned in the mechanism frame and in running fit relative to the mechanism frame, wherein the transmission shaft system at least comprises a first transmission locking shaft, a hollow shaft and a second transmission locking shaft which are coaxially arranged in sequence; a driving self-locking device connected with the end portion of the first transmission locking shaft, wherein driving self-locking and rotation driving of the transmission shaft system are realized through the driving self-locking device; an electronic braking device connected with the end portion of the second transmission locking shaft and used for braking the transmission shaft system; and a high-precision split testing device used for measuring the angle change of a navigation inertial unit in the hollow shaft.

The invention provides an integral forming die design method for a complex carbon fiber stiffener for a satellite. The integral forming die design method comprises the following steps of an outer siderib grid limiting step, in which an outer rigid enclosing strip is adopted for limiting to form a peripheral rib grid; a central rib grid positioning step, in which a rigid core mold is arranged in each grid box rib for positioning and limiting; and a soft die arrangement step, in which an expansion soft die is arranged in each rib grid to ensure that the rigid die and the expansion soft die arearranged in the left side and the right side of each stiffener respectively, wherein the interior of each grid box rib refers to the interior of a grid box area formed by the sealed portion in the stiffener in an enclosing manner, and each rigid die comprises an outer rigid enclosing strip and a rigid core die.

The invention discloses a short-circuit current self-driven quick switch. The switch comprises an upper wire outlet busbar, a lower wire outlet busbar, a contact system arranged between the upper wire outlet busbar and the lower wire outlet busbar, a repulsive force coil integrated on the lower wire outlet busbar, a repulsive force disc arranged under the repulsive force coil, an insulation connecting shaft with the top end fixed to the repulsive force disc, a holding mechanism and a buffer. The bottom end of the insulation connecting shaft penetrates through the holding mechanism and is arranged to correspond to the buffer, and the repulsive force coil is connected into a main loop in series and forms a through-flow loop together with the upper outgoing line busbar and the lower outgoing line busbar. The repulsive force coil is connected into the main loop in series, the rapid repulsive force opening is achieved through the short-circuit current self-driving under the fault working condition, a driving capacitor bank and a charging and discharging component thereof are omitted, the mechanism is simpler, waiting for an external instruction is not needed, and the opening response is faster and more reliable; and the repulsive force disc can be directly connected with the moving contact, thereby reducing connection links, further shortening response time delay, reducing stress of the insulation pull rod, and prolonging service life of the mechanism.

The present invention relates to a butterfly valve. It is made up by using valve body, valve plate, rotating shaft, shaft sleeve, positioning pin, seal ring, sealing gland, filling material, stuffing ring, upper flange, connection support and end cover. Said invention also provides their connection mode and the concrete structure of said butterfly valve. The above-mentioned elastic seal ring is made up by adopting teflon or modified teflon material.