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36 results about "Liquid resistor" patented technology
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A liquid resistor is an electrical resistor in which the resistive element is a liquid. Fixed-value liquid resistors are typically used where very high power dissipation is required. They are used in the rotor circuits of large slip ring induction motors to control starting current, torque and to limit large electrical fault currents (while other protection systems operate to clear or isolate the fault). They typically have electrodes made of welded steel plate (galvanised to reduce corrosion), suspended by insulated connections in a conductive chemical solution held in a tank - which may be open or enclosed. The tank body is normally solidly grounded or earthed. A typical unit can be rated for continuous use, or for short periods when used for current limitation in protection systems.
Pilot-operated type water hydraulic pressure digital proportional direction valve
InactiveCN102121487ANo pollution in the processSimple structureServomotor componentsCompliant mechanismEngineering
The invention discloses a pilot-operated type water hydraulic pressure digital proportional direction valve, which comprises a main valve and two pilot valves, wherein the pilot valves are positioned on the left side and the right side of the main valve respectively and are arranged on the main valve through an end face in a matching way; each pilot valve comprises a variable liquid resistor and a fixed liquid resistor which is connected in series with the variable liquid resistor; a control port communicated with the end face of a valve core of the main valve is positioned between the variable liquid resistor and the fixed liquid resistor; and the pressure of the control port can be changed by changing the resistance value of the variable liquid resistor so as to control the valve core of the main valve and control the direction and the flow rate of a liquid flow. In the invention, pulse code modulation (PCM) pilot control is adopted, so that the proportional direction valve can be simply and reliably controlled, and has high precision, high frequency and long service life; and the main valve has high flow rate. The pilot valves consist of a switching valve and a damping hole, have low leakage, high pollution resistance and high interference resistance and can be used in a marine environment containing a large number of solid impurities. The valve cores of the pilot valves are driven through piezoelectric ceramics, perform amplification displacement through a compliant mechanism and have simple driving mechanism structures, quick response and long service life.
Owner:HUAZHONG UNIV OF SCI & TECH
Hydraulic control device and control method thereof
InactiveCN102305223AMeet the requirements of the maximum deceleration ratePrevent overshootServomotorsFuel tankPosition control
The invention relates to a hydraulic control device and a control method thereof. The hydraulic control device comprises a quantitative oil pump (1) and an oil cylinder (3), wherein an outlet of the quantitative oil pump (1) is connected with an oil inlet way of the oil cylinder (3) and is also connected in parallel with an overflow valve (2) serving as a safety valve; an oil return way of the oil cylinder (3) is connected with an oil tank; a proportioning throttle valve (4) serving as an adjustable liquid resistor is connected in series on the oil return way of the oil cylinder (3); and the quantitative oil pump (1) is connected with a servo motor (5) for driving the quantitative oil pump to run. In the control method, the through-flow area of the proportioning throttle valve is adjusted automatically according to the change of actual flow in the speed reduction section of position control to ensure that the integral speed reduction section provides constant damping loads, so that the accuracy of the position control is not influenced by actual loads. The hydraulic control device has a simple structure and is low in cost, accurate in positioning, reasonable in design, convenient and practical; and the control method for the hydraulic control device is easy to operate and implement.
Owner:江门市蒙德电气股份有限公司
A rotor frequency conversion redundancy speed adjusting device
ActiveCN103368494ASimple structureHigh control precisionAC motor controlFrequency conversionEngineering
The invention discloses a rotor frequency conversion redundancy speed adjusting device. On the basis of the principles of a liquid resistor speed regulator and a rotor frequency converter, the liquid resistor speed regulator and the rotor frequency converter are improved and then are combined. The liquid resistor speed regulator is adjusted in order to achieve coordinate cooperative operation of the two speed adjusting devices. A PLC, an analog quantity I / O, and a revolution meter in the liquid resistor speed regulator are removed and then the liquid resistor speed regulator is controlled by an ordinary relay-contactor. The speed control power of the liquid resistor speed regulator is acquired by the rotor frequency converter so that a purpose of reliable redundancy speed adjustment is achieved. The rotor frequency conversion redundancy speed adjusting device has a wide application range and can be used for a common wire-wound asynchronous motor, an internal-feedback wire-wound asynchronous motor, a squirrel-cage brushless double-feed motor, a squirrel-cage feedback motor, and a novel brushless double-feed motor. The rotor frequency conversion redundancy speed adjusting device has characteristics of simple circuit structure, easy and convenient use, achieved remote monitoring and managing, high digitization degree, and energy conservation and environmental friendliness.
Owner:GUANGZHOU LONGZIAN ELECTRIC
Liquid resistor loading device
InactiveCN101957432AAdjust resistanceMeet the needs of electrical performance testingPower supply testingDynamo-electric machine testingElectrical resistance and conductanceElectricity
The invention relates to a high-voltage high-power liquid resistor loading device which comprises a liquid resistor box, a moving electrode plate, a fixed electrode plate, a position sensor, a pulling motor, a transmission screw rod, a sliding block and a controller. The device has the main characteristic that the lower ends of the moving electrode plate and the fixed electrode plate are both inserted into a resistance liquid in the liquid resistor box, the fixed electrode plate is fixedly installed, and the moving electrode plate can laterally move. The device adopts a simple transmission mechanism, the distance between the moving electrode plate and the fixed electrode plate is changed under the control of the position sensor and the controller, and the resistance of the liquid resistorcan be conveniently regulated through the change in the distance between the moving electrode plate and the fixed electrode plate; and the requirement on a high-voltage high-power generator or other high-voltage high-power power supply type devices for electrical performance tests can be satisfied. The continuity, the uniformity and the reliability of the high-voltage high-power generator or other high-voltage high-power power supply type devices for electrical performance tests are increased, meanwhile, the investment cost of the resistor loading device is reduced.
Owner:DAYU ELECTRIC
Pilot-operated type water hydraulic pressure digital proportional direction valve
InactiveCN102121487BNo pollution in the processSimple structureServomotor componentsCompliant mechanismEngineering
The invention discloses a pilot-operated type water hydraulic pressure digital proportional direction valve, which comprises a main valve and two pilot valves, wherein the pilot valves are positioned on the left side and the right side of the main valve respectively and are arranged on the main valve through an end face in a matching way; each pilot valve comprises a variable liquid resistor and a fixed liquid resistor which is connected in series with the variable liquid resistor; a control port communicated with the end face of a valve core of the main valve is positioned between the variable liquid resistor and the fixed liquid resistor; and the pressure of the control port can be changed by changing the resistance value of the variable liquid resistor so as to control the valve core of the main valve and control the direction and the flow rate of a liquid flow. In the invention, pulse code modulation (PCM) pilot control is adopted, so that the proportional direction valve can be simply and reliably controlled, and has high precision, high frequency and long service life; and the main valve has high flow rate. The pilot valves consist of a switching valve and a damping hole, have low leakage, high pollution resistance and high interference resistance and can be used in a marine environment containing a large number of solid impurities. The valve cores of the pilot valves are driven through piezoelectric ceramics, perform amplification displacement through a compliant mechanism and have simple driving mechanism structures, quick response and long service life.
Owner:HUAZHONG UNIV OF SCI & TECH
Hydraulic control one-way valve flow distribution radial plunger hydraulic device controlled by rotating shaft
ActiveCN113669318ACompact structureSimple drivePositive displacement pump componentsServomotor componentsOil distributionControl theory
The invention discloses a hydraulic control one-way valve flow distribution radial plunger hydraulic device controlled by a rotating shaft. The hydraulic control one-way valve flow distribution radial plunger hydraulic device comprises a shell, a plurality of plunger assemblies, a main shaft, the rotating shaft, first hydraulic control one-way valves and second hydraulic control one-way valves, wherein the number of the first hydraulic control one-way valves and the number of the second hydraulic control one-way valves are the same as that of the plunger assemblies, and the first hydraulic control one-way valves and the second hydraulic control one-way valves are in one-to-one correspondence with the plunger assemblies. The radial plunger hydraulic device is compact in structure, simple in transmission, capable of stably working under the high-pressure working condition and small in leakage amount. Meanwhile, external hydraulic source control is not needed, and oil connection is easy and convenient. The oil distribution pressure of the rotating shaft can be adjusted by a liquid resistor. Supporting is reliable, and work is stable. The main shaft and the rotating shaft are reliably supported and are not easy to deform, so that the shafts rotate more stably. A flow distribution pair is less in friction, working is stable, and the service life is long.
Owner:HUAQIAO UNIVERSITY
Conductivity sensor and manufacture method thereof
InactiveCN105548720ASimple structureEasy to prepareFluid resistance measurementsElectrical resistance and conductanceEngineering
The invention provides a conductivity sensor and a manufacture method thereof, relates to a liquid resistor detector and a manufacture method thereof, and aims at providing the conductive senor simple in structure, low in cost and small in size. The conductivity sensor comprises a cylindrical insulating shell, electrodes, insulating blocks and a circuit board, an installation hole is formed in the shell in the axial direction, the insulating blocks and at least two electrodes are arranged in the installation hole separately, corresponding axial through holes are formed in the insulating blocks and the electrodes respectively, the axial through holes are passed through to form a flow channel, an inlet joint and an outlet joint are fixed respectively at the two ends of the shell, channels in the inlet joint and the outlet joint are communicated with the flow channel in the shell, multiple lead holes communicated with the installation hole are formed in the outer wall of the shell, each lead hole corresponds to one electrode, leads are arranged in the lead holes, and the two ends of each lead are connected with the electrode and the circuit board respectively.
Owner:北京佰纯润宇生物科技有限公司
Water resistor capable of self-cyclically flowing and cooling for industry
ActiveCN107230538AGuaranteed to workImprove efficiencyResistor cooling/heating/ventillationLiquid resistorsAmbient pressureEngineering
The invention discloses a water resistor capable of self-cyclically flowing and cooling for industry. The distilled water and other liquid resistor are used as the resistor, so that the resistance liquid can cyclically flow in the system in the premise of not using a water pump by using the effects of the temperature field, the gas pressure and the gravity; the heat produced in the working process is immediately taken away by the resistance liquid and cooled through an external condensation pipe, thereby improving the radiating performance; and meanwhile, since the overall system is an opening system, the resistance liquid is limited by the saturated vapor pressure under the atmosphere, the highest internal temperature of the water resistor is only the boiling point, and the pressure intensity is the environment pressure; the design of the opening system avoids the problem that the water resistor structure cannot be continuously used for a long time since the water resistor structure is damaged by the internal high temperature and high pressured caused by the insufficient radiation in the traditional closed water resistor, the performance of the service life of the water resistor are guaranteed, and the normal operation of the high-power pulse equipment under high-frequency and long-time condition is guaranteed.
Owner:四川弘博新材科技股份有限公司
Liquid conductivity detection system
InactiveCN109188099ALow costEasy to detectElectrical measurement instrument detailsElectrical testingElectrical resistance and conductanceAlternating current
The invention discloses a liquid conductivity detection system. The liquid conductivity detection system comprises an alternating current signal excitation source, a reference resistor, a signal processing unit, a liquid resistor and a signal acquisition unit. The signal acquisition unit is connected with the signal processing unit, and the signal processing unit is further connected with the reference resistor, the liquid resistor and the alternating current signal excitation source. The other end of the liquid resistor is grounded, and the other end of the reference resistor is connected tothe alternating current signal excitation source. The liquid conductivity detection system does not need to detect an effective value of an alternating current signal, thereby simplifying the entire detection process and reducing the hardware cost.
Owner:湖南宝德机电设备有限公司
Electrohydraulic box for high voltage liquid resistor
ActiveCN101295571AReduce dosageReduce volumeStarter detailsResistor housing/enclosing/embeddingMiniaturizationEngineering
The invention discloses an electrohydraulic box used for a high pressure hydraulic resistance which is composed of a liquid storage box for holding the electrolyte, a fixed polar plate arranged in a box body and a dynamic polar plate; the invention is characterized in that the liquid storage box is internally provided with a plurality of cooling ventilating tubes that penetrate the upper box body and the lower box body; a shell which is preserved with a clearance and provided with an air inlet at the bottom part is sheathed on the periphery of the box body; an isolating supporter is arranged between the box body and the shell; the liquid storage box is made of a glass material; the box body for holding the electrolyte is designed to be a structure mode which is provided with the cooling ventilating tubes, and a shell body is additionally arranged outside the box body, therefore, not only the original use functions of the box body are maintained, but also the size of the box body is reduced, thus being capable of greatly reducing the size of the box body for holding the electrolyte and the use amount of the electrolyte; simultaneously conditions are created for the miniaturization of a soft start device of a whole set of high pressure AC electromotor.
Owner:博格华纳新能源(襄阳)有限公司
Pressure thermal insulating electric cooker
InactiveCN1527641ABoiling over preventionElectric heatingElectrical resistance and conductanceSolenoid valve
The present invention is one kind of simple heat insulating pressure rice cooker. The cover lock indicator lamp and the first resistor connected serially are mounted between two, the positive and the negative, power wires. The serial combination of cover lock switch, heating / temperature maintaining selecting switch, the second resistor and heating indicator lamp is connected parallelly with the cover lock indicator lamp and the first resistor. There are also divider resistor, normally closed AC solenoid valve connected serially to the divider resistor , one third resistor, temperature maintaining indicator lamp serially connected to the third resistor, thermostat, side heater and top heater connected serially, bottom heater connected serially to the heating indicator lamp. Increasing some elements can improve the quality of rice cooked and lower the cost of the cooker.
Owner:CUCKOO ELECTRONICS CO LTD
High pressure intelligent synthesis starting cabinet
InactiveCN101232153ASave materialGuaranteed uptimeBoards/switchyards circuit arrangementsSwitchgear arrangementsLow voltageEngineering
The invention relates to a high-voltage intelligent integrated starting box, which belongs to the field of high-voltage switch box and starting box technology, mainly solves the prior problems due to the separation of high-voltage switch box and starting box such as non-ideal switching, starting and even operating of a motor, complex operation and unstable effect. The high-voltage intelligent integrated starting box is characterized in comprising a box body, a water resisting box, a polar plate box, an isolation switch, a high-voltage vacuum contactor, a current transformer and a lightning arrester, a transmission motor and a transmission mechanism therein provided, wherein the isolation switch, the high-voltage vacuum contactor, a current transformer, the lightning arrester, a light resistor and a short-circuit contactor are electrically connected with each other to form a main circuit; the starting box further includes a control circuit for controlling the high-voltage switch and a low-voltage liquid resistor; Two isolated chambers of high-voltage and low-voltage are arranged in the upper part of the box body; and the isolation switch is disposed in the high-voltage chamber. The invention has the advantages of good starting effect, stable and convenient operation and less space, and can be widely used in metallurgic industry, building materials, chemical engineering industry, electric industry, etc.
Owner:XIANGYANG JINHENG ELECTRIC CO LTD
Starting speed regulator of liquid resistance in use for squirrel cage motor
InactiveCN100397771CTo achieve the purpose of cooling and coolingSolve insulation problemsLiquid resistorsPolyphase induction motor starterEngineeringOil water
Owner:何起军 +1
Liquid resistor load device for controlling resistance of liquid resistor through controller
InactiveCN105891550AControl resistance valueChange the contact areaElectrical measurement instrument detailsPower supply testingElectrical resistance and conductanceGas phase
The present invention relates to a liquid resistor load device for controlling the resistance of a liquid resistor through a controller. The device comprises a liquid resistance case, a liquid storage case, a liquid level sensor, a controller, a water pump, a motor, a gas-phase balance pipe, a liquid-phase connection pipe, a solenoid valve and the like. The resistance liquid is stored in the liquid resistance case and the liquid storage case, the two cases are integrated and are separated by the clapboard, an electrode and a position sensor are arranged at the liquid resistance case, and the electrode is inserted into the resistance liquid. The controller is connected with the liquid level sensor, the motor and the solenoid valve; the inlet of the water pump is connected with the resistance liquid at the resistance liquid supplement valve and the lower portion of the reservoir, and the outlet thereof is connected with the resistance liquid of the liquid resistance case and the resistance liquid gas phase of the liquid storage case. The liquid resistor load device for controlling the resistance of a liquid resistor through a controller employs a controller to regulate and control starting and closing of the solenoid valve and starting and stopping of the water pump, regulate and control the height of the resistance liquid level and regulate the resistance value so as to satisfy the requirement for the electrical performance test of various generators or other power devices with other powers.
Owner:HUBEI JEEN ELECTROMECHANICAL TECH
Liquid metal based flexible resistance micro heater
ActiveCN110392456AImprove flexibilityExtended service lifeHeating element materialsLiquid stateLiquid metal
The invention provides a liquid metal based flexible resistance micro heater. The micro heater includes an external flexible base material shell, a liquid metal resistor and lead wires; the external flexible base material shell completely or partially wraps the liquid metal resistor; the shell is provided with a liquid metal resistor flow path and / or air flow path, and the outer surface of the shell is a heating area; the liquid metal resistor is formed by single liquid metal or composite liquid metal; and the composite liquid metal consists of more than two kinds of metal, at least one kind of metal maintains a liquid state at normal temperature, and the metal is single metal or alloy. The liquid metal can be utilized to generate joule heat by being powered on, and the flexibility of themicro heater can be greatly enhanced by the external flexible shell and the liquid metal; through the improvement of the components or structures of the liquid metal, the operating temperature range and service life of the heater can be significantly prolonged; and the micro heater is easy to process and produce in batches, so that the micro heater can be applied to the fields of medical devices,biochemical instruments and high-end manufacturing equipment.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Assembly pole plate of super-power slip frequency regulator
ActiveCN106374782AImprove starting performanceOvercoming the large starting currentPolyphase induction motor starterElectrical resistance and conductancePower grid
The invention belongs to the field of soft starting of a motor liquid, belongs to the technical field of a super-power slip frequency regulator of a vertical winding asynchronous electromotor, and in particular relates to an assembly pole plate of a super-power slip frequency regulator. The interior of an insulation electrolyte box is loaded with a liquid resistor, a fixed electrode assembly is arranged at a position, near to the bottom, of the insulation electrolyte box, a movable electrode assembly is arranged right above the fixed electrode assembly, an external driving device can be used for driving the movable electrode assembly to vertically move in the insulation electrolyte box, and the movable electrode assembly can downwards move to be contacted and matched with the fixed electrode assembly; during the descending process of the movable electrode assembly, a stator current of a motor is used as a judgment criterion for a descending speed of the movable electrode assembly, the larger the current difference value is, the faster the descending speed is, and the current difference value is a difference value between a stator current actual value and a stator current set value; during the rising process, the movable electrode assembly is lifted to a predetermined position before the motor discharges, so that impact current of the electromotor to a power grid is avoided; and the predetermined position is set generally according to the descending amplitude of a rotational speed of the electromotor caused by the discharge of the motor.
Owner:SOUTHWESTERN INST OF PHYSICS +1
Conductivity measuring device capable of compensating environmental change and measuring method
InactiveCN112526212AAccurate measurementResistance/reactance/impedenceTemperature compensation modificationElectrical resistance and conductanceSignal processing circuits
The invention discloses a conductivity measuring device capable of compensating environmental change and a measuring method, the device comprises a conductivity sensor and a signal processing circuit,the conductivity sensor comprises a primary magnetic core, a secondary magnetic core and a liquid diversion pipe which are located in a sensor shell, a primary winding is wound on the primary magnetic core, a secondary winding is wound on the secondary magnetic core, the winding directions of the primary winding and the secondary winding are opposite; a liquid loop and a resistance loop are arranged between the primary magnetic core and the secondary magnetic core, a liquid resistor Rw exists on the liquid loop, wires of the resistance loop are respectively wound on the primary magnetic coreand the secondary magnetic core for one circle and are crossed at a gap between the two magnetic cores, and a loop resistor Rr and an analog switch S1 are connected in series in the resistance loop; and the signal processing circuit comprises an inverting amplifying circuit, an integrating circuit, a sampling holding circuit, an A / D module and an MCU which are connected in sequence. The device andthe method can compensate the measured value drift caused by external environment changes such as temperature and the like, and realize accurate measurement of the liquid conductivity.
Owner:SHANDONG UNIV OF SCI & TECH
High-voltage synchronous motor testing device and testing method
ActiveCN109001630AImprove test efficiencyShorten test timeDynamo-electric machine testingTest efficiencySynchronous motor
The invention discloses a high-voltage synchronous motor testing device, comprising a three-phase voltage regulator and a voltage monitoring device. An input end of the three-phase voltage regulator is connected with a power supply network, and an output end is connected with the input end of a microcomputer comprehensive protector. The voltage monitoring device is connected with two ends of a liquid resistor. Through adoption of the high-voltage synchronous motor testing device, a differential protection test and a liquid resistor resistance value test of a high-voltage synchronous motor canbe realized at the same time, so test efficiency of the high-voltage synchronous motor is improved, and test duration is reduced. The invention also discloses a method for carrying out a test throughutilization of the high-voltage synchronous motor testing device.
Owner:CHINA METALLURGICAL CONSTR ENG GRP
High-voltage capacitor quasi-constant-power discharging apparatus with adjustable discharging power
InactiveCN106653357AEasy to useThe use process is clearCapacitorsLiquid resistorsElectrical resistance and conductanceConstant power
The invention belongs to the technical field of a high-power discharging apparatus, and specifically relates to a high-voltage capacitor quasi-constant-power discharging apparatus with adjustable discharging power. The discharging apparatus comprises a high-voltage discharging end (1), an organic glass outer cylinder (2), a discharging resistor (3), a low-voltage discharging end (4), a temperature compensation gasbag (5), a metal movable pull rod (6), a liquid resistor sealing plate (7), a sealing ring pressing plate (8), a low-voltage discharging end grounding point (9), a movable insulating supporting part (10), a liquid resistor adjusting handle (11) and an insulating supporting cylinder (12). The discharging resistor of the apparatus adopts the liquid resistor with adjustable resistance value; the discharging process comprises several time stages; and the discharging resistor is adjusted to an appointed numerical value at the beginning of each stage, so that approximately unchanged discharging power in the whole discharging time frame can be realized, the discharging time is greatly shortened, and the working efficiency of the high-power capacitor system is improved.
Owner:NAT UNIV OF DEFENSE TECH
A liquid conductivity detection system
InactiveCN109188099BLow costEasy to detectElectrical measurement instrument detailsElectrical testingProcessing elementMechanical engineering
Owner:湖南宝德机电设备有限公司
Starting speed regulator of liquid resistance in use for squirrel cage motor
InactiveCN1917354ATo achieve the purpose of cooling and coolingSolve insulation problemsLiquid resistorsPolyphase induction motor starterOil waterEngineering
The invention is designed for solving the problem of which the liquid resistor currently used in the squirrel cage motor always carries high voltage so as to threaten the human safety. It comprises a cabinet, a liquid resistor tank located on the moving pole plate and the fixed pole plate, a driver mechanism for driving the pole plates to make up and down movement, and a cooling system. The liquid resistor tank is separated by a stick up plate into a liquid resistor chamber and a slack flow chamber. On the upper portion of the liquid resistor chamber, there is a filter layer, and on the upper portion of the slack flow chamber, there is an oil-water separator; the water outlet is connected to the liquid resistor chamber; the oil outlet is connected to the slack flow chamber. The input pipe and outlet pipe all are made of high pressure resistance materials, and are respectively connected to the entrance and the exit of cooling agent. The cooling system uses high pressure resistance cooling agent.
Owner:何起军 +1
Bidirectional silicon controlled rectifier adjusting type liquid resistance starter
InactiveCN104426428AReduce water vaporReduce the number of dosingPolyphase induction motor starterSilicon-controlled rectifierDIAC
The invention, which relates to the field of the electrical technology, provides a bidirectional silicon controlled rectifier adjusting type liquid resistance starter. Bidirectional silicon controlled rectifiers are connected in parallel to liquid resistors of a motor; and the conduction angles of the bidirectional silicon controlled rectifiers are controlled by a control unit. The control unit is composed of a time setting adjusting unit, an adjusting signal unit, and a synchronous triggering unit. According to preset starting time, the time setting adjusting unit outputs an adjusting signal with the current of 4 to 20mA after operation by using each second as the step length; on the basis of the adjusting signal, the trigger unit sends a trigger command out in real time when a synchronous signal is valid, the conduction angles of the bidirectional silicon controlled rectifiers are gradually increased until full conduction is realized, thereby completing the reduction process of the equivalent resistance to zero. According to the invention, no mechanical moving component is used; the size is reduced; and no noise is caused. The box body of the liquid resistor liquid can be processed into one in a sealed mode, so that the steam generated by starting of the liquid resistors and the number of times for liquid adding can be reduced and thus the maintenance workload and the production cost can be substantially reduced. The control circuits are reduced; and the operation becomes simple.
Owner:湖北鼎鼎电气有限公司
Heat dissipation device for SYQT intelligent dynamic liquid resistance speed regulator and using method
ActiveCN112700937AImprove cooling effectGuaranteed work efficiencyStarter detailsLiquid resistorsPlate heat exchangerCooling tower
The invention belongs to the technical field of electrical cabinets, relates to a heat dissipation device for an SYQT intelligent dynamic liquid resistance speed regulator and a using method.An existing liquid resistor generates heat due to the fact that large current passes through the existing liquid resistor, and as a result, the electro-hydraulic temperature rises too high and too fast. The invention just aims to solve the above problem. According to the technical schemes of the invention, a plurality of resistance speed regulation cabinets are arranged; a heat dissipation plate is arranged on the surface of the front side of each resistance speed regulation cabinet; a short-circuit cabinet is arranged on one side of each resistance speed regulation cabinet; a control cabinet is arranged on the other side of each resistance speed regulation cabinet; a cooling tower is connected to the outer side of the top of each resistance speed regulation cabinet; and an alkali liquor storage box is arranged on the surface of the rear side of each resistance speed regulation cabinet. The cooling towers, plate heat exchangers and water pumps are arranged; the plate heat exchangers cool alkali liquor through cooling water; the used cooling water enters the cooling towers through the water pumps, so that the recycling of the cooling water is achieved; the cooling effect of the cooling towers is good, the cooling water is free of loss, and circulating cooling work can be conducted for a long time.
Owner:湖北中盛电气有限公司
Hydraulic damping device for direct-drive bicycle riding platform
InactiveCN111760236AEfficient heat dissipationExtended service lifeMuscle exercising devicesMovement coordination devicesImpellerEngineering
The invention discloses a hydraulic damping device for a direct-drive bicycle riding platform, and relates to the technical field of physical training instruments. The damping device for the direct drive type bicycle riding platform is composed of a liquid resistor used for generating damping, a mechanical transmission mechanism used for driving the liquid resistor and a cooling device used for heat dissipation of the liquid resistor, wherein a casing, an O-shaped sealing ring, a resistance wheel shaft, an impeller, a bearing seat, a built-in flywheel, a resin plate and a fastening ring form the liquid resistor used for generating damping, damping oil is injected into the casing, the O-shaped sealing ring is placed in a casing sealing groove, and the fastening ring is connected with the casing through a bolt. According to the invention, a hydraulic damping technology is adopted; the connection of power supply is not needed, the device is wide in application range and free of electromagnetic noise, a transmission component capable of generating damping is sealed in a sealed oil cavity, the casing has the smooth characteristics of noise isolation, more silence and hydraulic damping,and due to the inertia effect of an internally-arranged external flywheel and the built-in flywheel, the riding feeling is smoother.
Owner:JINHUA TIANYU TOOLS
Liquid resistor loading device
InactiveCN101957432BAdjust resistanceMeet the needs of electrical performance testingPower supply testingDynamo-electric machine testingEngineeringHigh pressure
Owner:DAYU ELECTRIC
Soft start and compensation integrated device
PendingCN114005631AMove quicklyQuickly control movement speedDynamo-electric motors/converters startersStarter detailsControl theoryRapid response
The invention discloses a soft start and compensation integrated device, which comprises a main body module, a quick response module, a flow compensation module and an angle change module, and the main body module is used for adjusting the resistance value of a liquid resistor during soft start, and the quick response module is used for quickly adjusting the main body module according to the current change during soft start; the main body module comprises a liquid storage outer box and a liquid storage inner box, the liquid storage inner box is arranged in the liquid storage outer box, the front side and the rear side of the liquid storage inner box are fixedly connected with the inner wall of the liquid storage outer box, a movable pole plate and a fixed pole plate are arranged in the liquid storage inner box, and sliding grooves are formed in the front side and the rear side of the inner wall of the liquid storage inner box; and magnet blocks are fixedly connected to the middle parts of the front and rear sides of the movable pole plate. Through the main body module and the quick response module, the movable pole plate can be rapidly moved, and the control precision is higher.
Owner:襄阳赛克斯电气股份有限公司
High-temperature alloy smelting device
InactiveCN108731474AWide range of choicesGood symmetryCharge treatment typeCrucible furnacesSuperalloyProcessing cost
The invention discloses a high-temperature alloy smelting device and relates to the technical field of smelting devices of alloys. According to the device, a liquid melt is placed in a liquid resistorcarrier by means of a centrifugal force, and a liquid resistor is electrified in a movement condition through a rotary electrode, so that the liquid resistor heats; and then a directional freezing device is controlled by controlling the shape of the liquid resistor or movement of a crucible. According to the device and a method, the liquid melt which is high in boiling point is taken as the resistor, so that the heating temperature can be improved greatly, and meanwhile, the high boiling point liquid melt can be a metal melt and a non-metal melt, so that the selecting range of the liquid resistor is wide. The symmetry of a temperature field in the rotating condition is relatively high. The shape of the rotary liquid resistor can be changed at will according to the shape of the liquid resistor carrier, so that the processing difficulty and the processing cost of a solid resistor are reduced greatly.
Owner:孟静
Broadband liquid attenuator based on T-shaped resistance network
ActiveCN111883892ARealize self-circulation heat dissipationImprove cooling efficiencyWaveguide type devicesMicrowaveParallel plate
The invention discloses a broadband liquid attenuator based on a T-shaped resistance network, and the attenuator comprises a grounding plate, a T-shaped resistance attenuation network which consists of a second liquid resistor and symmetrical first liquid resistors located at the left and right sides of the second liquid resistor, a gradual change transmission line 4 connected with the first liquid resistors, a parallel plate transmission line located between a feed port and the gradual change transmission line, and a water outlet and a water inlet located in the side face and the bottom faceof a transparent overall container structure respectively. Based on the T-shaped resistance attenuation network, the broadband liquid attenuator with the attenuation amount of 12 dB and the working frequency of DC3 GHz is achieved, and the fluctuation of an attenuation value within 2 GHz is not larger than 2.6 dB. A liquid attenuation material is adopted, the heat dissipation efficiency of the attenuator can be improved through a self-circulation system, a compact attenuator structure is achieved through the direct action of microwaves and circulating liquid, and the design can be used for large-power microwave measurement in the future.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Liquid resistor starting device
InactiveCN104022691AReduce shockSmall starting currentPolyphase induction motor starterCrusherConductor Coil
The invention discloses a liquid resistor starting device, and relates to the technical field of electric equipment manufacture. The starting device comprises a high-voltage contactor, of which one end of a main contact head is connected with a power supply and the other end is connected with a main motor stator winding; a rotor reservation operation resistor; and a liquid resistor. One end of the rotor reservation operation resistor is connected with a main motor rotor winding, and the other end is electrically connected with a static pole plate at one end of the liquid resistor. A main contact head of a short circuit contactor is arranged on the connecting line between the rotor reservation operation resistor and the liquid resistor. A movable pole plate in the liquid resistor is connected with a lifting motor. One end of a junction box of the lifting motor is electrically connected with one end of the main contact head of a positive and negative rotation contactor. The other end of the main contact head of the positive and negative rotation contactor is connected with the power supply. The starting device can help to solve the problems that the starting current of a heavy load-starting high-voltage wingding-type AC motor of a mine crusher and the like is large, and big impact is caused to a power grid.
Owner:GUANGXI YUFENG GRP CEMENT CO LTD +1
Combined liqued resistance type digital hydraulic control technology
Owner:SHANDONG UNIV
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