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33results about How to "Change drive" patented technology

Self-adaptive sectional driving DC-DC (Direct Current to Direct Current) converter

InactiveCN103401423ASimple and easy to control structureChange driveDc-dc conversionElectric variable regulationEngineeringFeedback control
The invention relates to an integrated circuit technology, in particular to a load self-adaptive sectional driving circuit with a mode switching function. A self-adaptive sectional driving DC-DC (Direct Current to Direct Current) converter which is disclosed by the invention comprises a conversion unit, a driving unit and a feedback control unit and is characterized in that the conversion unit comprises a switching circuit and a filtering circuit; the switching circuit comprises a plurality of PMOS (P-channel Metal Oxide Semiconductor) power tubes which are connected in parallel and a plurality of NMOS (N-channel metal oxide semiconductor) power tubes which are connected in parallel; the PMOS power tubes are divided into PM groups; the NMOS power tubes are divided into NM groups; and the driving unit can be used for respectively controlling on-off of each group of PMOS tubes and NMOS tubes. The self-adaptive sectional driving DC-DC converter has the beneficial effects that a driving mode of the power tubes is changed; the effect of working in a PSM (Pulse Skipping Modulation) control mode under a light load is improved; the number of the started power tubes is changed by detecting variation of a load current so as to minimize the sum of conduction loss and driving loss of the power tubes, thereby improving efficiency of the DC-DC converter and particularly efficiency under the light load. The self-adaptive sectional driving DC-DC converter is particularly suitable for the DC-DC converter.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Thermomagnetic sliding bush stop sealing device for nuclear reactor coolant pump

A thermomagnetic sliding bush stop sealing device for a nuclear reactor coolant pump comprises a sliding bush base and a sliding bush. The sliding bush base and a shaft are in interference fit, the sliding bush and the shaft are in clearance fit, the sliding bush is sleeved in the sliding bush base, a first seal ring, a second seal ring and a third seal ring are arranged on the sliding bush which is made of metal materials, and the sliding bush base is made of magnetic materials. The sliding bush is internally provided with two symmetric spring cavities, springs are arranged in the spring cavities, and the sliding bush base is provided with a hole. The sliding bush base and the sliding bush are attracted to compress the springs while the hole is sealed by the sliding bush. When a primary seal of the nuclear reactor coolant pump fails, high-temperature process fluid makes the sliding bush base lose magnetism, magnetic force between the sliding bush and the sliding bush base disappears, the sliding bush moves to the primary seal until being tightly pressed on the wall of a pump cavity under the action of spring force and pressure of the high-temperature fluid in the pump cavity, and the high-temperature process fluid in the pump cavity is prevented from leaking outwards. The thermomagnetic sliding bush stop sealing device is passive and free of external gas supply.
Owner:TSINGHUA UNIV

Anti-shock electronic control lock

The invention discloses an anti-shock electronic control lock. The anti-shock electronic control lock comprises a lock shell corresponding to a lock hook of a door body and a hook clamping lever rotationally arranged in the lock shell through a return torsion spring; the hook clamping lever is provided with a clamping groove corresponding to the lock hook and a hook clamping lever motion stoppingface; a power source module and a circuit board are arranged in the lock shell; the hook clamping lever motion stopping face is provided with a transition arc-shaped face, an unlocking motion stoppingportion and a locking motion stopping portion, and the unlocking motion stopping portion and the locking motion stopping portion are respectively located at the two ends of the transition arc-shapedface; a first limiting elastic assembly and a second limiting elastic assembly are further arranged in the lock shell; one end of the first limiting elastic assembly corresponds to the unlocking motion stopping portion and the locking motion stopping portion; the other end of the first limiting elastic assembly is in limiting cooperation with one end of the second limiting elastic assembly; the other end of the second limiting elastic assembly is connected with one end of a shape memory alloy part; the other end of the shape memory alloy part is a fixed end; the power source module is electrically connected with the shape memory alloy part; and the circuit board is connected with the power source module.
Owner:深圳市星河泉新材料有限公司

A thermal magnetic sliding sleeve parking sealing device for nuclear main pump

A thermomagnetic sliding bush stop sealing device for a nuclear reactor coolant pump comprises a sliding bush base and a sliding bush. The sliding bush base and a shaft are in interference fit, the sliding bush and the shaft are in clearance fit, the sliding bush is sleeved in the sliding bush base, a first seal ring, a second seal ring and a third seal ring are arranged on the sliding bush which is made of metal materials, and the sliding bush base is made of magnetic materials. The sliding bush is internally provided with two symmetric spring cavities, springs are arranged in the spring cavities, and the sliding bush base is provided with a hole. The sliding bush base and the sliding bush are attracted to compress the springs while the hole is sealed by the sliding bush. When a primary seal of the nuclear reactor coolant pump fails, high-temperature process fluid makes the sliding bush base lose magnetism, magnetic force between the sliding bush and the sliding bush base disappears, the sliding bush moves to the primary seal until being tightly pressed on the wall of a pump cavity under the action of spring force and pressure of the high-temperature fluid in the pump cavity, and the high-temperature process fluid in the pump cavity is prevented from leaking outwards. The thermomagnetic sliding bush stop sealing device is passive and free of external gas supply.
Owner:TSINGHUA UNIV

Chain belt transmission vehicle driving device

The invention provides a chain belt transmission vehicle driving device which comprises a supporting bridge, two first bearings are arranged on the supporting bridge, inner rings of the first bearings are connected with an inner shaft installed in the supporting bridge, one side of the inner shaft is a stepped shaft section, the stepped shaft section is connected with a belt wheel, and a shaft sleeve connected to the stepped shaft section in a sleeving mode is arranged on the outer side of the belt wheel. The stepped shaft section outside the shaft sleeve is connected with a first gear disc, and the other side of the inner shaft is connected with a second gear disc; the outer side of the first bearing is connected with a support, the support is connected with a vehicle bottom plate, the two sides of the vehicle bottom plate are connected with a first beam plate and a second beam plate respectively, through holes are formed in the first beam plate and the second beam plate respectively, second bearings are fixedly connected into the through holes, inner rings of the second bearings are connected with supporting columns, the supporting columns are connected with a fluted disc body, and a driving fluted disc is arranged on the fluted disc body. The first gear disc and the second gear disc are connected with driving fluted discs corresponding to the first beam plate and the second beam plate through transmission chains respectively, and the driving fluted discs are connected with wheel assemblies.
Owner:海汇新能源汽车有限公司

Variable shaft height wheel

The invention relates to a variable shaft height wheel which comprises a rim, a central shaft, a support system and a driving system, wherein the central shaft, the support system and the driving system are fixedly connected with an axle; the support system comprises two hydraulic support structures which are positioned on diameters perpendicular to the rim on an automobile chassis; the two hydraulic support systems are symmetrically and fixedly connected with the central shaft; the inner ring of the rim is divided into two half circles by the two hydraulic support structures; at least one hydraulic support structure which is fixedly connected with the central shaft is uniformly distributed in each half circle; the driving system comprises driving wheels and a full-disc motor; two motor shafts of the full-disc motor are connected with lugs of the hydraulic support structures through bearings; the driving wheel is arranged on the full-disc motor in a sleeving manner; outer teeth are arranged on the outer circumference of the driving wheel; inner teeth in transmission matched with the outer teeth on the driving wheel are arranged on the inner ring of the rim. The variable shaft height wheel has the advantages of being compact in structure, high in security, good in stability, relatively low in cost, easy in precise control, and the like.
Owner:JILIN UNIV

An Adaptive Segment Drive dc-dc Converter

InactiveCN103401423BSimple and easy to control structureChange driveDc-dc conversionElectric variable regulationEngineeringFeedback control
The invention relates to an integrated circuit technology, in particular to a load self-adaptive sectional driving circuit with a mode switching function. A self-adaptive sectional driving DC-DC (Direct Current to Direct Current) converter which is disclosed by the invention comprises a conversion unit, a driving unit and a feedback control unit and is characterized in that the conversion unit comprises a switching circuit and a filtering circuit; the switching circuit comprises a plurality of PMOS (P-channel Metal Oxide Semiconductor) power tubes which are connected in parallel and a plurality of NMOS (N-channel metal oxide semiconductor) power tubes which are connected in parallel; the PMOS power tubes are divided into PM groups; the NMOS power tubes are divided into NM groups; and the driving unit can be used for respectively controlling on-off of each group of PMOS tubes and NMOS tubes. The self-adaptive sectional driving DC-DC converter has the beneficial effects that a driving mode of the power tubes is changed; the effect of working in a PSM (Pulse Skipping Modulation) control mode under a light load is improved; the number of the started power tubes is changed by detecting variation of a load current so as to minimize the sum of conduction loss and driving loss of the power tubes, thereby improving efficiency of the DC-DC converter and particularly efficiency under the light load. The self-adaptive sectional driving DC-DC converter is particularly suitable for the DC-DC converter.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

A thermal flow-driven elastic cone parking sealing device for nuclear main pumps

The invention relates to a heat flow driving type elastic cone parking sealing device for a nuclear main pump. The heat flow driving type elastic cone parking sealing device comprises a sealing support and an elastic cone, wherein a triangular heat expansion layer is welded on the elastic cone; a rectangular heat expansion layer is welded on the sealing support; the elastic cone is sleeved on a main shaft, and a sealing gap is formed between the elastic cone and the sealing support; the elastic cone and the main shaft are in interference fit; a sealing ring is arranged between the elastic cone and the main shaft; when primary seal of the nuclear main pump is in failure, under the effect of a fluid force, the elastic cone is pressed to the sealing support; moreover, under the heat effect of a hot flow, the triangular expansion layer is expanded by heat, and the elastic cone is further compressed; the rectangular expansion layer on the sealing support is expanded by heat, the elastic cone is compressed radially; under the fluid force and the pressing forces of the triangular expansion layer and the rectangular expansion layer, the top end of the elastic cone is deformed, and surface contact of the elastic cone and the sealing support is realized, thus a flow leakage passage is blocked, and leakage of radioactive sealing fluid is prevented; the device changes the driving manner of parking sealing work, an external air source is not required, and the device has nonmotility.
Owner:TSINGHUA UNIV

Active magnetic suspension transport vehicle and application thereof

The invention relates to an active magnetic suspension transport vehicle and an application thereof. The active magnetic suspension transport vehicle comprises a vehicle body and magnetic rails, wherein a main driver is arranged on the vehicle body, the main driver comprises a motor, magnetic wheels, a storage battery and a power supply comprehensive management control system, the storage batteryand the power supply comprehensive management control system are connected with the motor, the motor is connected with the magnetic wheels at two sides, the magnetic wheels at two sides are correspondingly positioned above the magnetic rails, a plurality of magnetic wheel magnets with different polarities from the magnetic rails are arranged on the outer circumference of each magnetic wheel, the vehicle body is placed on the magnetic rails, the magnetic wheels and the magnetic rails repel each other in the same polarity, so that the vehicle body is in a suspension state, the motor drives the magnetic wheels at two sides, so that driving force is generated between the magnetic wheels and the magnetic rails, and the vehicle body is driven to move forward. According to the active magnetic suspension transport vehicle and the application thereof, the driving mode of a traditional magnetic suspension vehicle is changed, passive driving is changed to active driving, only the main driver is arranged on the vehicle body, a plurality of drivers are not arranged on a track, so that more accurate control can be realized; and the structure design is scientific and reasonable, the constructionis simpler, and the cost is lower.
Owner:JINAN SHANGHAI FLUID CONTROL EQUIP CO LTD

Forward and backward motion type center shaft transmission mechanism

The invention discloses a forward and backward motion type center shaft transmission mechanism. The forward and backward motion type center shaft transmission mechanism comprises a center shaft cylinder, a circular cross, occlusion small gears and fracture-surface gears, wherein the circular cross, the occlusion small gears and the fracture-surface gears are located in the center shaft cylinder. The occlusion small gears are installed on the periphery of the circular cross, a fracture-surface gear center shaft penetrates through the middle of the circular cross, and the fracture-surface gearsare installed at the two ends of the fracture-surface gear center shaft correspondingly in a sleeving mode; and the gear ends of the fracture-surface gears are installed at the two ends of the fracture-surface gear center shaft in a sleeving mode and engaged with the occlusion small gears, the rotary shaft ends of the fracture-surface gears extend out of the center shaft cylinder, the portions, inthe center shaft cylinder, of the rotary shaft ends are sequentially sleeved with bearings and center shaft locking covers, and the fracture-surface gears are fixed to the two ends of the center shaft cylinder through the center shaft locking covers. According to the forward and backward motion type center shaft transmission mechanism, the transmission efficiency is improved, the invalid processin the transmission process is reduced, the forward and backward motion type center shaft transmission mechanism can be applied to different fields, the cost of the transmission efficiency can be maximally reduced, and the number of complex mechanisms needing to achieve reciprocating motion in the transmission process is decreased.
Owner:刘永安
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