70results about How to "Guaranteed thrust" patented technology

The invention relates to an electric-propulsion-field microthrust transient measurement system based on a dynamic photoelastic method. In the invention, according to a thrust characteristic of electric propulsion, based on the dynamic photoelastic method, an optical elastic component is taken as a core so as to construct an optical path system; and through measuring real-time changes of an optical stripe image under a stress, instantaneous stress size and change conditions are displayed. The system comprises a laser, the optical elastic component, a high-speed transient image collector and a necessary image processing technology. The system is mainly used for collecting transient thrusts which are continuously changed along with time and are generated by a pulse-type propulsion system. The system is based on a stress-optical law. A photoelastic special material and a high-speed photography device are used to visualize the thrusts generated by a thruster, and a change process of the thrusts is especially recorded so as to research a change mechanism of the thrusts of an electric propulsion thruster.

The invention discloses an electric control power device with real-time controllable thrust and capable of repeatedly igniting and extinguishing. The electric control power device comprises a combustion chamber shell, a spray pipe, an electrode fixing sleeve, an electrode, an electric control solid propellant grain, a spring, a lead end insulating plate, an electrode fixing device, a thermal protection layer, an insulating layer, a resistance monitor, a voltage controller, a fixed sealing end and an electrode contact pin. According to the electric control power device, the voltage required byfirst ignition is reduced by changing the electrode structures of the initial combustion surface and the combustion surface of the propellant grain, and meanwhile, the stable combustion of the same end surface can be guaranteed through the electrode contact and end surface combustion modes; the resistance monitor is matched with the voltage controller, and the applied voltage is adjusted, so thatthe magnitude of the generated thrust is ensured to be certain; and the electrode contact pin is matched with the fixed sealing end for use, so that the sealing effect on a combustion chamber can be achieved, the electric control power device can be easily assembled with an external missile or an aircraft, and the purposes of rapid installation and disassembly are achieved.

The invention relates to a variable diameter screw propeller, which comprises propeller blades (3) and propeller hubs (4), and further comprises a rod connection mechanism (1), a drive mechanism (2), a propeller cap (5), a slide support mechanism (6) and a locking releasing mechanism (7), wherein the propeller cap (5) is arranged on the propeller hub (4), and provides installation spaces and top supports for the rod connection mechanism (1), the drive mechanism (2), the slide support mechanism (6) and the locking releasing mechanism (7), the drive mechanism (2) and the slide support mechanism (6) are fixed on the propeller hub (4), an output shaft of the drive mechanism (2) is connected with the rod connection mechanism (1), the propeller blades (3) are fixed on a guide outlet end of the rod connection mechanism (1), the bottom of the guide outlet end of the rod connection mechanism (1) is connected with the slide support mechanism (6), the slide support mechanism (6) provides support and guide for the rod connection mechanism (1), the drive mechanism (2) drives the rod connection mechanism (1) to drive the propeller blades (3) along the slide support mechanism (6) to stretch along a diameter direction of the screw propeller so as to change a diameter of the whole screw propeller disc, and the rod connection mechanism (1) is locked through the locking releasing mechanism (7) after the propeller blades (3) stretch in place.

The invention discloses a hydraulic hole opener and a hole opening method. The hydraulic hole opener comprises an upper connector 1, the upper connector is connected with the upper end of a body 7 through threads, the lower end of the body is connected with a lower connector 22, an upper ball seat 4 is arranged in the upper connector and is connected with the upper connector through a dowel pin 3, three cutter wing grooves distributed in 120 degrees are formed in the body, a cutter wing 11 is arranged in each cutter wing groove, a mandrel 9 is arranged in the body, a piston 15 sleeves the bottom of the mandrel, a retainer ring 12 is arranged at the top of the piston, and hole opening operation is finished by pushing the cutter wings to expand outwards through the retainer ring. The hole opener is simple in structure, convenient to disassemble and capable of folding the unfolded cutter wings forcedly. Reliability of the cutter wings can be improved by changing a mud channel, cutter wing blocking possibility is reduced, cutter wing deformation is small, and the service life of the cutter wings and the body are prolonged. The safety of the hole opener is greatly improved, and the drill blocking problem caused by the fact that the cutter wings cannot be folded due to fault is solved.

The invention belongs to the field of wave energy driven marine aircrafts, and particularly relates to a hydrofoil with a wing plate limiting angle adjusting control device and a wave driven unmannedship. The wave driven unmanned ship is characterized in that hull pitching motion energy capturing and converting devices are located at the head and the tail and used for capturing hull pitching motion energy for limiting adjustment, the wing plate limiting angle adjusting control device is located in a support between a left wing plate and a right wing plate, the rotating angle amplitude is limited through the wing plate limiting angle adjusting control device when the hydrofoil rotates, a corner control device is controlled by an electric push rod, a control system gives a required rotationangle amplitude according to the sensed wave motion, and the rotation angle of a limiting device is controlled through stretching and retracting of the electric push rod. When a wave energy aircraftsails in sea waves with different wave heights and wavelengths, the limiting angle amplitude of the rotating motion of the hydrofoil is adjusted according to the preset rotating angle requirement, thewave energy aircraft can adapt to different sea conditions, it is guaranteed that the hydrofoil provides thrust under various sea conditions, and the comprehensive utilization efficiency of wave energy is greatly improved.

The invention relates to a paper adding device for a printer. The device comprises a paper tank; a processor and a driving board connected with the processor are fixedly mounted on the front side of the lower part of the paper tank; an extension arm is fixed on each of the left side and the right side of the front end surface of the paper tank; a shaft is fixed at front ends of the extension arms; the middle of the shaft is sleeved with a paper rubbing wheel; the right end of the shaft is fixedly connected with a motor; the motor is connected with the driving board; a clamping block is fixed on each of the left side and the right side of the middle of the lower end surface of the paper tank; clamping grooves are formed in the clamping blocks; a No.1 compression spring is fixedly connected onto the inner wall of a back end board of the paper tank; and a push plate is fixed at the front end of the No.1 compression spring. The device for adding spare paper is provided for the existing printer, when the printer is mounted in a protecting frame in a sealed manner, paper can be fed to the printer by the aid of the paper adding device, the service cycle of the printer can be prolonged, the frequency for opening the protecting frame to add paper can be reduced, the user experience can be improved, and operation of a print requester can be facilitated.

The invention relates to a mechanical transmission device, in particular to an electric cylinder. The electric cylinder comprises an electric cylinder body, an electric cylinder screw rod, a screw rod cap fixing sleeve a, and an electric cylinder main rod; a front end fixing block and a tail end fixing block are arranged at the two ends of the electric cylinder body; the screw rod cap fixing sleeve a sleeves the electric cylinder screw rod; a screw rod cap fixing sleeve guiding block is arranged on the outer wall in the middle of the screw rod cap fixing sleeve a, and clamped in a vertical clamping groove in the electric cylinder body; one end of the electric cylinder main rod is connected with the screw rod cap fixing sleeve a, and the other end of the electric cylinder main rod penetrates through the front end fixing block; the tail end of the electric cylinder screw rod penetrates through a bearing structure. The mechanical transmission device has the benefits that the design is simple, the structure is novel, the use is convenient, and the noise is low.

The invention provides a dumper for unloading a material on two sides by lifting the middle of a bottom plate of a carriage. The dumper comprises a bottom plate longitudinal beam, a left movable bottom plate, a right movable bottom plate, a left cover plate and a right cover plate which are positioned on left and right sides of the bottom plate longitudinal beam, and a lifting mechanism, wherein the lifting mechanism comprises an ejector rod which can freely stretch to lift, and is fixed on an auxiliary frame and positioned under the bottom plate longitudinal beam; the dumper is characterizedin that: a transverse beam which is transversely arranged in the left and right direction is fixed on the auxiliary frame; the left side of the left movable bottom plate and the right side of the right movable bottom plate are hinged with left and right sides of the transverse beam respectively; the right side of the left cover plate is hinged with the bottom plate longitudinal beam; the lower surface of the left cover plate is lapped with the upper surface of the left movable bottom plate; the left side of the right cover plate is hinged with the bottom plate longitudinal beam; the lower surface of the right cover plate is lapped with the upper surface of the right movable bottom plate; the top end of the ejector rod of the lifting mechanism is fixedly connected with the lower side face of the bottom plate longitudinal beam; the dumper also comprises a loading and unloading mechanism comprising one or more groups of structures of supporting arms, left side arms and right side arms which are arranged in the longitudinal direction and are in profile distribution; the supporting arms are positioned under the bottom plate longitudinal beam and the upper ends of the supporting arms are fixed on the lower side face of the bottom plate longitudinal beam; and the left ends of the left side arms are hinged with the right side of the left movable bottom plate.

The invention provides a bionic jellyfish robot which comprises a mounting end body, a transparent cover body is fixedly mounted on the outer wall of the top of the mounting end body, the mounting end body is specifically a circular plate, an inner mounting end block is fixedly mounted at the circle center of the outer wall of the top of the mounting end body, a rotating direction adjusting mechanism is mounted on the outer wall of the top of the inner mounting end block, and a shooting mechanism is fixedly mounted on one side of the outer wall of the top of the rotating direction adjusting mechanism. By arranging the rotating direction adjusting mechanism, a low-speed motor can be utilized to drive a driving gear to rotate, and an inner tooth groove is matched to drive a sleeve disc to rotate, so that the direction of the shooting mechanism can be adjusted; and through an arranged first small electric telescopic rod, an extension rod of the first small electric telescopic rod can be controlled to stretch out, so that pressure is evenly applied to the cross rod ring, cross inclined rods are folded towards the circle center of the cross rod ring, then lamp beads are gathered together, spotlighting operation is achieved, and the better shooting and lighting effect is achieved.

The invention relates to the field of shipboard aircraft engine design, in particular to a control method for improving aerodynamic stability of a shipboard aircraft engine during takeoff, which comprises the following steps of: determining whether an aircraft is on the ground and thrust augmentation oil reaches a maximum state, and if so, executing control logic on the aircraft; using the engine outlet total pressure for reconstructing the engine inlet total temperature, using the reconstructed engine inlet total temperature for obtaining the rotating speed, the temperature, the thrust augmentation oil and the nozzle control plan value of the engine in the maximum state, and using the reconstructed engine inlet total temperature for obtaining the relative conversion rotating speed of a high-pressure rotor; using the relative conversion rotating speed of the high-temperature rotor for obtaining the angle control plan value of the adjustable blade of the gas compressor, and controlling the shipboard aircraft; and determining the state of the aircraft, and if the aircraft starts to slide forwards, quitting the aircraft control logic. The method has the technical effect of simultaneously ensuring the stability of the take-off state of the shipboard aircraft and the thrust demand.

The invention discloses an auxiliary stocking propelling device and a propelling method thereof. Stockings are conveyed from a starting end to a tail end on a transmission belt, and are about to stride on a static working panel. The stockings gain forward inertia force under the transmission of the transmission belt. Friction force exists between the stockings and the working panel, so that the own inertia force of the stockings is reduced gradually along with striding of the stockings on the working surface, and most stockings are clamped at the critical point. After the propelling device disclosed by the invention is arranged, thrust force for assisting the stockings in moving forwards is provided through a contact point between a roller and the transmission belt by using the inertial force gained by a roller on the transmission belt, so that certain acceleration is provided for the stockings, and the stockings can stride on the working surface smoothly.

The invention relates to a solid vector thruster multi-valve cooperative control method, device and system. The solid vector thruster comprises a plurality of thruster valves, the input ends of the multiple thruster valves share a gas generator channel, and output thrust of the multiple thruster valves is used for achieving aircraft attitude control. The control method comprises the following steps: establishing a linear relation between control forces required by pitching, yawing and rolling channels and valve opening degrees of thruster valves corresponding to the channels, and enabling the sum of the valve opening degrees of the plurality of thruster valves to be a fixed value during working; and the output thrust of the corresponding thruster valve is controlled according to the valve opening degree. The multi-valve synergistic effect is achieved while it is guaranteed that the pressure intensity of the system is stable, and vector thrust is continuously adjustable.

The invention provides a TBM operation parameter optimization method and system suitable for various rock mass conditions. The method comprises the steps of obtaining rock mass parameters and TBM tunneling data corresponding to the rock mass parameters are obtained; building a first change rule by taking the compressive strength and the penetration of the rock mass as input and the thrust of the cutter head as output; building a second change rule by taking the compressive strength and penetration of the rock mass as input and the torque of the cutterhead as output; taking the rock mass parameters and the operation parameters as inputs, taking the corresponding performance parameters as outputs, taking the first change rule and the second change rule as constraint conditions, and establishing a dual-drive mapping relation between the input data and the output data; establishing a TBM operation parameter optimization model by taking construction cost including tunneling speed and hob service life as a comprehensive optimization target and taking thrust, torque and belt conveyor conveying capacity as multivariate constraint indexes; using the TBM operation parameter optimization model for calculating operation parameters under the known rock mass condition when all the constraint indexes are within the rated range and the construction cost is minimum.

The invention relates to the technical field of pipe machining, and discloses a large-curvature small-curvature one-time forming device for pipes. The device comprises a mounting plate, a cover shellis fixedly connected to the top of the mounting plate, a power box is fixedly connected to the bottom of the mounting plate, a motor which is vertically arranged is fixedly connected to the inner bottom of the power box, an output shaft of the motor is located at the upper end of the motor, and the tail end of the output shaft of the motor is fixedly connected with a rotating rod in a sleeved modethrough a coupler; and the rotating rod penetrates through the side wall of the mounting plate and extends into the interior of the cover shell, the rotating rod is rotationally connected with the mounting plate, a push-bending die is fixedly connected to the top of the rotating rod, a fixing block corresponding to the push-bending die is fixedly connected to the inner top of the cover shell, oneside, close to the push-bending die, of the fixing block is provided with a gear groove, and the inner wall of the gear groove is rotationally connected with two fixed roller wheels corresponding tothe push-bending die through bearings. According to the large-curvature small-curvature one-time forming device for the pipes, large-curvature forming and small-curvature forming of the pipes can be completed without replacing machining equipment and a machining process.

The invention discloses an active-passive combined upper limb power-assisting robot, and belongs to the technical field of robots. The active-passive combined upper limb power-assisting robot comprises a waist mechanism, a back mechanism and shoulder mechanisms, and the waist mechanism and the back mechanism are located on the back waist and the back of a human body respectively; the robot further comprises the shoulder mechanisms and passive power-assisting mechanisms; the lower ends of the shoulder mechanisms are connected with the back mechanism, the upper ends of the shoulder mechanisms are located above the back mechanism, and shoulder joints are assisted in abduction / constriction, inward rotation / outward rotation and forward flexion / backward extension movement through driving force; the lower ends of the passive power-assisting mechanisms are connected with the back mechanism, the upper ends of the passive power-assisting mechanisms are connected with the shoulder mechanisms, and the passive power-assisting mechanisms are used for providing multi-directional boosting force and supporting force for a user and the shoulder mechanisms; and the shoulder mechanisms have six degrees of freedom, not only provide supporting force for the shoulders, but also provide assistance in three degrees of freedom directions of abduction / convergence, inward rotation / outward rotation and forward flexion / backward extension of the shoulder joints by utilizing the passive power-assisting mechanisms and torsion springs, and effectively provide multidirectional assistance for a human body to carry and lift goods.

According to the rocket vertical landing guidance method considering the discontinuous instant adjustable engine thrust, the thrust instruction considering the engine thrust characteristic limitation can be planned in real time, and model prediction control of the landing point, the landing angle and the landing speed of a rocket body can be accurately controlled. The invention provides a rocket vertical landing guidance algorithm considering discontinuous and instant adjustment of engine thrust, a decoupling control strategy of tangential speed control and normal drop point and drop angle control is established, and an engine thrust instruction which is designed by utilizing an impulse conservation principle and meets actual thrust adjustment limitation is provided. According to the method, introduction of multiple complex and difficult-to-process nonlinear constraints is effectively avoided, the efficiency, convergence and reliability of convex optimization solution are improved, the guidance precision and robustness are remarkably enhanced, and higher engineering applicability is achieved.

The invention discloses a wearable carrying power-assisted exoskeleton, and belongs to the field of material carrying and logistics support. The wearable carrying power-assisted exoskeleton comprises a waist and back mechanism, a shoulder mechanism, a hip crossing mechanism, a thigh mechanism, a knee joint mechanism, a shank mechanism, an ankle mechanism and a foot plate; the lower end of the shoulder mechanism is connected with the back mechanism, and the upper end of the shoulder mechanism is located above the back mechanism; and the shoulder joint is assisted by driving force to do outward extension / inward contraction, inward rotation / outward rotation and forward bending / backward stretching motion. The hip crossing mechanism, the thigh mechanism, the knee joint mechanism, the shank mechanism, the ankle mechanism and the foot plate correspond to the hip, the thigh, the knee joint, the shank, the ankle and the foot of the human body from top to bottom. The extremely high supporting capacity is provided through a mechanical structure; multi-freedom-degree motion assistance of the upper limbs is provided through a servo motor and a spring; and the wearable carrying power-assisted exoskeleton is light, flexible and easy to dismount and mount.

The invention discloses a wide velocity domain variable geometry air inlet. The start mach number of a hypersonic velocity air inlet is greatly lowered through a rotary hypersonic velocity air inlet lip and a third-stage top plate. A good traffic capture capacity can be guaranteed when the mach number of the hypersonic velocity air inlet is small, and in other words, motor power is guaranteed.

The invention discloses an unmanned aerial vehicle with a quick detaching double-propeller structure and belongs to the technical field of unmanned aerial vehicles. The unmanned aerial vehicle comprises a first rotor wing, a second rotor wing, two quick detaching assemblies, a vehicle body, a first detaching assembly and a signal positioning assembly. The first rotor wing is rotationally fixed to a rotor wing shaft through one quick detaching assembly, and the second rotor wing is rotationally fixed to a rotor wing shaft through the other quick detaching assembly; and the diameter of the first rotor wing is larger than that of the second rotor wing. The first detaching assembly is fixed to the vehicle body and connected with a cradle head in a sliding manner. The signal positioning assembly is fixed to a vehicle shell. By the adoption of the unmanned aerial vehicle with the quick detaching double-propeller structure, the technical defect that a multi-rotor-wing unmanned aerial vehicle is low in flight efficiency in the prior art is overcome.

The invention discloses a drilling tool, and belongs to the field of drilling and production. The drilling tool comprises an upper connector, a shell, a first piston, a first piston rod and an outputshaft, wherein the upper connector is connected with the shell, the first piston is fixed in the shell, a first through hole is formed in the first piston, a first step is arranged between the head segment and the tail segment of the first piston rod, the tail segment of the first piston rod penetrates through the first through hole and is connected with one end of the output shaft, and the otherend of the output shaft is connected with a drill bit; the first piston rod is capable of driving the output shaft to move when the end face of the head segment bears pressure of mud flowing from theupper connector until the first step of the first piston rod makes contact with the first piston. Thrust exerted on the drill bit is ensured by the drilling tool comprising the first piston rod, the first piston and the output shaft, and therefore drilling speed and drilling operation efficiency are ensured.