52results about How to "Achieve a soft landing" patented technology

The present invention relates to a control method of air conditioner safety shutdown. Said method includes the following steps: when the turn-off signal of indoor machine is received by outdoor machine, the compressor is in low-frequency operation, when it is used for refrigeration, the control system can forcedly close the electronic expansion valve of indoor machine, when it is used for heat production, the control system can forcedly close the electronic expansion valve of outdoor machine; then the cooling agent from electronic expansion valve to suction line of compressor can be discharged from exhaust hole by compressor; when the exhaust temperature of compressor is risen or low-pressure pressure is lowered to defined value, then control system can be used for controlling compressor and making it stop safety shutdown process of air conditioner. Said invention can utilize said control method to ensure normal operation of said system.

The invention discloses a carrier rocket sub-stage recycling system and method. The carrier rocket sub-stage recycling system comprises a recycling box body, a probe device, a signal transceiver, a plurality of airbags, an inflation device, moving mechanisms and a ground control system. The recycling box body is of a U-shaped box body structure with the top end being not closed; the probe device,the signal transceiver and the inflation device are arranged on the recycling box body; the multiple airbags are arranged at the bottom and on the side faces of the recycling box body correspondingly;the inflation device is connected with the multiple airbags; the moving mechanisms are arranged at the bottom of the recycling box body; and the ground control system makes remote communication withthe carrier rocket sub-stage recycling system through the signal transceiver. Based on a carrier rocket in active service, recycling of a sub-stage part is completed while the carrier rocket sub-stagepart is less changed.

The invention discloses an automatic receiving and transferring device for a pneumatic material conveying system. The automatic receiving and transferring device is connected to a pneumatic conveying pipeline unit used for conveying objects to be conveyed and comprises a cabinet body, and a receiving and transferring pipeline, a supporting and lifting platform unit and a manipulator unit are arranged inside the cabinet body; the upper end of the receiving and transferring pipeline is used for communicating with the pneumatic conveying pipeline unit; the supporting and lifting platform unit is matched with the receiving and transferring pipeline, does lifting motion below the receiving and transferring pipeline and is used for lifting the objects to be conveyed upwards, conveying the objects to be conveyed into the receiving and transferring pipeline for pneumatic conveyance and used for falling down after receiving the objects to be conveyed from the receiving and transferring pipeline; and the manipulator unit is arranged on one side of the lifting platform unit and is used for placing the objects to be conveyed from the exterior of the cabinet body on the lifting platform unit for lifting the objects and conveying the objects pneumatically and used for placing the objects to be conveyed on the lifting platform unit outside the cabinet body. The automatic receiving and transferring device has the advantages that the structure is simple and compact and the automation degree is high.

The invention provides a printed circuit board semi-finished product conveying and partition plate feeding integrated device. The printed circuit board semi-finished product conveying and partition plate feeding integrated device comprises a conveying roller set, a pair of adjustable guide assemblies, a pair of limiting supporting assemblies arranged in a spaced manner, a partition plate storage rack, a partition plate grabbing mechanism and a pair of partition plate bearing assemblies arranged in a spaced manner. Each limiting supporting assembly comprises a row of limiting supporting columns arranged in a spaced manner, wherein the limiting supporting columns are arranged in the gap between two adjacent roller bodies of the conveying roller set, the bottom ends of the row of limiting supporting columns are connected with the same connecting plate, the connecting plate is connected to the movable ends of a pair of first lifting air cylinders, the first lifting air cylinders are arranged on a base, and the base is arranged at the movable end of a first transverse linear mechanism. According to the printed circuit board semi-finished product conveying and partition plate feeding integrated device, conveying of printed circuit boards of different sizes is collimated and limited, the printed circuit boards can be normally overturned when conveyed to an overturning area, partition plate feeding is conducted on the printed circuit boards in the conveying process, partition plates are arranged between the overturned and stacked printed circuit boards, and protection on metal circuits on the two faces of a semi-finished product is formed.

The invention relates to an artificial knee joint prosthesis which comprises a patella prosthesis and a femur prosthesis, wherein the patella prosthesis is made of metal and is 3-4mm, preferably 3.5mm in thickness; the femur prosthesis is provided with a tackle part which is made of metal; a polyethylene joint surface is arranged on the surface of the tackle part; and the polyethylene joint surface is gradually thickened from a near end to a far end and no gap exists between the polyethylene joint surface and the tackle part. The artificial knee joint has the following advantages: the patella prosthesis is made of metal, so that the wear resisting property is good, the thickness is thin, the patella cut amount is decreased, then the application scope of the existing knee joint prosthesis is enlarged, the postoperative fracture occurrence rate is reduced, benefit is brought to overhauling and the problem of uneven patella stress distribution is solved at the same time; the tackle part of the femur prosthesis is covered by a layer of ultra-high molecular polyethylene joint surface, so that the abrasion is reduced and the 'soft landing' of femur quadriceps tendon is realized; and no gap exists between the polyethylene joint surface and the metal backing and the polyethylene joint surface and the metal backing are integrally pressed and shaped, so that a polyethylene/metal friction surface is not added.

The invention relates to a variable cross-section heavy piston compressor. The variable cross-section heavy piston compressor comprises a high-pressure air chamber, a heavy piston, a compression pipe and a film clamping mechanism, wherein the high-pressure air chamber is used for driving the heavy piston; the compression pipe is composed of a thick compression pipe section and a thin compression pipe section at a diameter ratio of 2.0-3.5; the heavy piston is driven by the high-pressure air chamber to move inside the thick compression pipe section; the film clamping mechanism clamps a film inside the thin compression pipe section. The variable cross-section heavy piston compressor can effectively relieve shock wave attenuation caused by reflective rarefaction waves, greatly improve the stability of wave tunnel enthylpy value and nozzle chamber pressure and prolong effective wind tunnel testing time.

The invention relates to an air valve seating control device for a hydraulic drive air valve mechanism of an engine, which mainly comprises a hydraulic piston, a hydraulic oil channel, a one-way valve, a hydraulic piston cavity, a variable throttling channel and the like. The hydraulic piston cavity is provided with a main oil channel of the variable throttling channel and a bypass oil channel with the one-way valve and is communicated with a hydraulic system; and the hydraulic piston is used for driving an air valve to move. The air valve seating control device adopts the one-way valve to lead the hydraulic drive air valve mechanism to have different hydraulic circulation areas in the opening and closing process of the air valve; with the adoption of the variable throttling channel, the throttling circulation areas can be changed along with the air valve lift in the closing process of the air valve, and the air valve seating speed of the hydraulic drive air valve mechanism of the engine is furthermore controlled to realize the soft landing of the air valve.

The invention relates to a safety life-saving chamber capable of being used in usual time and emergency and automatically escaping, opening a parachute and landing softly. Inverted caret-shaped slopes formed by tops and bottoms of octagonal spherical chambers of the safety life-saving chamber and a fuselage form the fitting channel type relationship, thick flanges at the upper, the lower, the left and the right parts of a chamber body and two bracket-shaped channel type fasteners at the upper and the lower parts of the fuselage form the fitting relationship, the planar anti-rotation relationship is formed between the fronts and the backs of all the octagonal spherical chambers which are arranged along a longitudinal line, and a concave table folding side at the bottom of the chamber can be used for positioning for the lower part and loading for the above part. An upper lining plate, a lower lining plate, four hollow screw rods and screws for penetrating the chamber top and the chamber bottom and three butterfly-shaped shelves lead the chamber to constitute a life-saving device with good integrity and impact resistance. The parachute is fastened on an annular handle at the chamber top, foam plastic partition boards are arranged among the various chamber tops for preventing the parachutes at the various chamber tops from winding, and big and small conical springs are arranged at the chamber bottom, so that the safety life-saving chamber can not only prevent the imbalance of gravity generated during the up-and-down tilts and the left-and-right tilts during the flight of a plane, but also realize the automatic rapid escape, parachute opening and soft landing in emergency; furthermore, the safety life-saving chamber can separate the chamber and the parachute when falling into the sea and use a sealing cover with a vent pipe for inputting oxygen into the chamber.

The invention discloses a constant-pressure and constant-torque tool for fluid well drilling. The constant-pressure and constant-torque tool comprises an upper joint, an upper shell, a middle shell, a lower shell, a lower joint, a compensation joint, a mandrel, a limiting baffle ring, a piston, a nut, a first disc spring group, a second disc spring group and a third disc spring group, the mandrel is provided with an inner through hole, a mandrel bypass hole and a limiting step, the first disc spring group and the second disc spring group are mounted in the upper shell, the third disc spring group is mounted in the compensation joint, a multi-head thread groove and an oil injection hole are formed in the middle shell, a multi-head thread groove is formed in the outer portion of the lower joint, a combined sealing groove and an oil injection hole are formed in the lower shell, and a combined sealing groove is formed in the piston. The multi-head thread groove of the middle shell is engaged with the multi-head thread groove of the lower joint, so that compression torsion replacement is achieved, the energy storage function of the disc spring groups is combined, the purpose of constant pressure and constant torque is achieved, the tool is compact in structure and powerful in function, different drilling tools can be protected according to different mounting positions, and the purpose of stable drilling is achieved.

The invention discloses a safe landing airplane, which is characterized in that an airplane head separation part, an airplane tail separation part and an airplane seat separation part are arranged among an airplane head, a passenger cabin, an airplane tail and an airplane seat, so that the passenger cabin can be separated from other parts of the airplane in emergency; an engine and a grid wing are arranged on the peripheral side of the passenger cabin, the engine and the grid wing are controlled through a control system, the grid wing is responsible for buffering and decelerating, and the engine is responsible for steering of the passenger cabin, so that the posture of the airplane is adjusted, and the passenger cabin has a stable and appropriate landing posture and a slow descent balance speed. A passenger cabin parachute part is arranged at the tail of the passenger cabin so as to decelerate the passenger cabin in a landing state through a parachute; a landing buffer system comprising a buffer bracket and a buffer airbag is arranged at the head part of the passenger cabin so as to realize soft landing of the passenger cabin; safety landing of the passenger cabin is achieved by setting various safeguard measures, so that safety of passengers in the passenger cabin is guaranteed.

The invention relates to a power outage self-protection method of an industrial robot. The power outage self-protection method comprises the following steps that an inverter converts the electrical energy of a power storage device into the normal power supply after an external power source of a system is disconnected, and a motor drives a manipulator and a parking and storing mechanism to move until the tail end of the manipulator is moved to the parking and storing mechanism. The invention further relates to the industrial robot achieving the power outage self-protection method. The industrial robot includes a machine body and an electrical cabinet which are connected with a bracket; the machine body comprises the manipulator and the servo motor; the electrical cabinet comprises a servo motor driver and a controller; the servo motor is connected with the controller through the servo motor driver; the industrial robot further includes the parking and storing mechanism connected to thebracket, the power storage device and the inverter, wherein the power storage device and the inverter are arranged in the electrical cabinet; and the inverter converts the electrical energy of the power storage device into the normal power supply after the external power source of the system is disconnected, so that the tail end of the manipulator is moved to the parking and storing mechanism. Bymeans of the power outage self-protection method and the industrial robot, the cost is reduced, and the manipulator is prevented from hitting a platform in the event of power outage.

The invention provides a spacecraft recycling linear electromagnetic damping device, relates to the field of spacecraft recycling, and aims at solving disadvantages of parachute landing systems that are conventionally used as spacecraft recycling devices, like large diameter and large weight of the parachute surface, and occupying spacecraft load resources. When preparing recycling, a plurality ofevenly arranged support frames support recycling nets, and net corners of the recycling nets are respectively connected with linear electromagnetic damper movers of the support frames. When the spacecraft falls into the recycling nets, the linear electromagnetic damper movers are pulled downward; meanwhile, permanent magnets on stators cut third conductor plates on the movers to generate magneticfields; and braking forces are generated to buffer the descent process of the spacecraft falling into the recycling nets and control the falling speed of the spacecraft. After the recycling process is completed, the movers and the recycling nets are lifted by drive coils integrated in the linear electromagnetic dampers to prepare for a next spacecraft recycling. The device is used for recycling aspacecraft.

The invention provides a device for ensuring soft landing and overload alarm of hooks. The device comprises two sets of eudipleural units, wherein the two sets of symmetric units are connected by an upper guide sleeve (104) and a lower guide sleeve (104) and are respectively fixed on a travelling vehicle by an upper fixed plate (105) and a lower fixed plate (105); the unit comprises an expansion link (101), two anti-drop guide rods (102), an elastic part (103), a flange (110), an adjustable screw (111) and a circuit control subunit; a circular hole is formed at one end of the expansion link (101) for a steel wire rope (109) to pass, and the adjustable screw (111) is connected with the other end of the expansion link (101); the flange (110) sleeves the expansion link (101), the elastic part (103) is located between the guide sleeve (104) and the flange (110), the two anti-drop guide rods (102) respectively pass through two ends of the two guide sleeves (104) and the flange (110), and the circuit control subunit is arranged on the guide sleeve (104) so as to be used for controlling a hook motor.

The invention relates to the technical field of an unmanned aerial vehicle and discloses a crash-preventing unmanned aerial vehicle. The crash-preventing unmanned aerial vehicle comprises a machine body, a safe airbag system and a processor, wherein the safe airbag system comprises a collision sensor, a plurality of safe airbags and an air charging device; the processor is connected with the collision sensor and the air charging device; and the processor is used for receiving a collision signal transmitted by the collision sensor and controlling the air charging device to perform air inflationon a plurality of safe airbags. The crash-preventing unmanned aerial vehicle provided by the execution mode of the invention is provided with the safe airbag system and the processor, the collision sensor of the safe airbag system transmits the collision signal to the processor when foreign body collision occurs, and the processor receives the collision signal and controls the air charging deviceto perform air inflation on a plurality of safe airbags according to the collision signal, so that a plurality of safe airbags are opened, the crash-preventing unmanned aerial vehicle can realize soft landing and comminuted crash is avoided.

The invention provides an impact resisting check valve. The impact resisting check valve is composed of a valve body, a valve seat, a valve clack, an elastic piece and a valve cover. The valve clack is arranged on the valve seat in a vertical moving mode. The elastic piece is arranged on the valve clack in a sleeving mode to make the valve clack have the tendency of being closed to the valve seat. A guide sleeve and a fixing plug are fixedly arranged above a middle cavity of the valve body. The fixing plug is located in the middle of the guide sleeve and extends downwards. The upper portion of the valve clack is arranged in the guide sleeve in a vertical sliding fit mode. A receding space is arranged above the valve clack and located on the guide sleeve. A piston hole for the fixing plug to be inserted therein is formed in the valve clack. A through hole communicated with the middle cavity is formed in the bottom of the side wall of the piston hole. A buffering structure hole communicated with the piston hole and the middle cavity is formed above the through hole. The buffering structure hole vertically extends in the length direction of the buffering structure hole. The buffering structure hole is provided with an upper section and a lower section which are communicated. The moving speed of the valve clack is controlled through the relative position relation of the fixing plug and the buffering structure hole. Impact force produced between the valve clack and the valve seat when the valve clack is closed is prevented, and therefore the service life of the valve is prolonged.