30results about How to "Fix running stability issues" patented technology

This invention discloses a bi-directional air intake pulse tube refrigerator, which contains compressor, heat exchanger at heat end of heat regenerator, cold heat, pulse tube, pulse tube heat end exchanger, small hole valve, air reservoir, corrugated pipe dc block structure in heat end of pulse tube, and capillary set between air inlet of heat regenerator and heat end of pulse tube. Said invention eliminates the influence of dc to refrigeration temperature and quantity, and operation stability.

The invention discloses a modular medium-voltage waveform generator loss equalization control method and system. The method comprises the steps: taking each bridge arm of a modular medium-voltage waveform generator as a control target, building a model prediction control evaluation function comprising input, output and internal control variables, taking the optimal tracking performance as a control target, and selecting the optimal level number of each bridge arm; and for each full-bridge sub-module in one bridge arm, when a switching signal is configured, configuring the switching state of apower switching device in a balanced manner by taking equal action times of a left bridge arm and a right bridge arm of the sub-module as a target, so that on the premise of ensuring accurate trackingof input current, output current and internal circulation and sub-module capacitor voltage balance control, the effect of balanced distribution of internal losses of the modular medium-voltage waveform generator is achieved, and the operation reliability of the modular medium-voltage waveform generator is improved.

The invention relates to the field of household electrical appliances, and discloses a lighting fixture and a control method for the lighting fixture. The lighting fixture is powered by commercial power, comprising: a lighting switch; a power conversion circuit; a power monitoring circuit; a load regulation circuit; When the lighting fixture is turned on, a power-on reminder signal is sent to the load regulation circuit, and the load regulation circuit does not respond to the received load regulation signal within a preset time after receiving the power-on reminder signal. A lighting fixture using a lighting fixture control method can prevent loop problems caused by momentary load fluctuations.

The invention provides an immersion oil processing apparatus for power transmission of a single-point mooring system. The apparatus comprises an oil inlet valve for controlling oil to flow out of an oil chamber; an online monitoring device for the monitoring micro-water, chromatogram and granularity of the oil in a pipeline; a water removal filter for filtering seawater in the oil; a self-cooling radiator for performing heat dissipation and cooling on the oil in the pipeline; a particle removal high-efficiency filter for filtering metal grindings carried by oil blocks aggregated in the pipeline and oil circulation; a motor for controlling an oil pump to realize cyclic flow of the oil in a whole work system; and oil outlet valve for controlling the oil to flow into the oil chamber from the circulating pipeline. The apparatus provided by the invention ensures high voltage withstanding and breakdown resisting performance, high corrosion resisting performance and high safety performance of the single-point mooring system.

The invention relates to a pumping chamber of a centrifugal pump, and aims to improve the operation stability and wear resistance of the centrifugal pump. The pumping chamber comprises a pumping chamber shell (1), a pumping chamber outlet (2) and a pumping chamber partition tongue (3), wherein a groove (4) is formed in the pumping chamber along the longitudinal direction and extends along the direction from the partition tongue (3) to the pumping chamber outlet (2). The inner wall of the pumping chamber is of unequal thickness, rectangular section grooves are longitudinally formed in the innerwall of the pumping chamber, and therefore, the structure can improve flow stability of a flow field, influence the movement state of solid particles in the centrifugal pump, improve the operation stability of the pump, inhibit the abrasion of the inner wall of the pumping chamber, and prolong the service life of the centrifugal pump. The pumping chamber is suitable for the fields such as electric power pumping irrigation engineering, petrochemical industry and mine metallurgy.

The invention discloses an expander refrigeration low-temperature cooling nano-particle jet micro-lubrication supply system, including an expander, which performs approximately isentropic expansion and cooling of the compressed gas passing into it to form low-temperature cold air; a nano-fluid micro-lubrication supply system, which includes a pump Body, camshaft and piston, the camshaft is connected with the electromagnetic speed-regulating motor; the electromagnetic speed-regulating motor is used to drive the camshaft to rotate and then drive the pump body and the piston to periodically move relative to each other, and then transport the nanofluid into the oil pipeline; external mixing The nozzle includes a nozzle gas inlet pipe and a nozzle needle. The oil delivery pipe extends into the nozzle gas inlet pipe. An insulation pipe is arranged between the oil delivery pipe and the nozzle gas inlet pipe. Low-temperature cold air is introduced between the insulation pipe and the nozzle gas inlet pipe; the nozzle needle One end is connected to the oil delivery pipe, and the other end of the nozzle needle extends outward to the outside of the outer mixing nozzle; the nanofluid in the oil delivery pipe is sprayed out from the nozzle needle, and then mixed with the low-temperature cold air sprayed out of the outer mixing nozzle and then atomized.

The invention relates to a pumping chamber of a centrifugal pump, and aims to improve the operation stability and wear resistance of the centrifugal pump. The pumping chamber comprises a pumping chamber shell (1), a pumping chamber outlet (2) and a pumping chamber partition tongue (3), wherein a groove (4) is formed in the pumping chamber along the longitudinal direction and extends along the direction from the partition tongue (3) to the pumping chamber outlet (2). The inner wall of the pumping chamber is of unequal thickness, rectangular section grooves are longitudinally formed in the innerwall of the pumping chamber, and therefore, the structure can improve flow stability of a flow field, influence the movement state of solid particles in the centrifugal pump, improve the operation stability of the pump, inhibit the abrasion of the inner wall of the pumping chamber, and prolong the service life of the centrifugal pump. The pumping chamber is suitable for the fields such as electric power pumping irrigation engineering, petrochemical industry and mine metallurgy.

The invention relates to an apparatus for automatically detecting insulating properties of an electric power transmission line. The apparatus is characterized by including an apparatus main body, a walking module, a measuring module, an outer expansion module, a secondary opening module, a power supply module, a control module and a wireless communication module. The control module, the power supply module, and the wireless communication module are mounted inside the apparatus main body. The power supply module and the other modules are connected so as to supply power to the other modules. The control module is connected to the walking module, the measuring module, the outer expansion module, the secondary opening module, and the wireless communication module so as to realize detection control function. According to the invention, the apparatus main body is moving on the electric power transmission line, and a temperature sensor and an electric field sensor are used individually for collecting temperature values and electric field intensity values at different positions of the electric power transmission line, and malfunction points are determined by the temperature values and the electric field intensity values in combination with a counter on a drive wheel. The apparatus of the invention guarantees timeliness of detection of the insulating properties of the electric power transmission line, effectively prevents unnecessary trouble brought by current method of artificial detection, and substantially increases detection efficiency.

The invention relates to an air energy injection enthalpy-increasing ultra-low temperature cascade dryer comprising a first circulating system and a second circulating system. The first circulating system is a refrigeration system, and the second circulating system is a heating system; refrigerant gas evaporating in the first circulating system exchanges heat with liquid refrigerants condensing in the second circulating system, so that the refrigerant gas provides heat to the second circulating system through an intermediate heat exchanger via a compressor after heat in air is absorbed through evaporation in the first circulating system; the first circulating system and the second circulating system are connected through the intermediate heat exchanger, and the refrigerant gas evaporatingin the first circulating system exchanges heat with the liquid refrigerants condensing in the second circulating system, so that the refrigerant gas evaporating in the circulating system provides heat to the second circulating system; and the first circulating system is provided with an auxiliary enthalpy-increasing system which comprises an enthalpy-increasing valve and an enthalpy-increasing electronic expansion valve, and the enthalpy-increasing valve and the enthalpy-increasing electronic expansion valve are installed on the first circulating system through auxiliary pipelines. Accordingto the air energy injection enthalpy-increasing ultra-low temperature cascade dryer, the problem of the operation stability of an air source heat pump at a severe cold area is solved effectively; andthe dryer has the advantages of high efficiency, energy saving, emission reduction, safety and reliability, long service life, simple operation and the like.

The invention discloses an expander-driven refrigeration low-temperature cooling nanoparticle jet micro-lubrication supply system, comprising a low-temperature gas generating device, the low-temperature gas generating device is connected to a nano-fluid micro-lubrication supply system after being decelerated by a harmonic gear reducer, and the low-temperature gas The generating device is connected with the gas distribution control valve, the nanofluid micro-lubrication supply system is also connected with the external mixing nozzle, and the gas distribution control valve is used to control the gas flow; the system device can effectively reduce the thermal damage of grinding and improve the efficiency of the grinding process. The surface integrity and machining accuracy of the machined workpiece have stronger cooling performance and excellent tribological characteristics, and the surface can realize low-carbon green and clean production with high efficiency, low consumption, environmental friendliness and resource saving.

The invention discloses a loss equalization control method and system of a modularized medium-voltage waveform generator. Each bridge arm of the modularized medium-voltage waveform generator is used as a control target, and a model prediction including input, output and internal control variables is established. Control the evaluation function, with the optimal tracking performance as the control target, select the optimal level number of each bridge arm; for each full-bridge sub-module in a bridge arm, when configuring the switch signal, use the left bridge of the sub-module The goal is to equalize the number of actions of the right bridge arm and the right bridge arm, and balance the switching states of the power switching devices to achieve a modularized medium voltage under the premise of ensuring accurate tracking of the input current, output current, internal circulation current and sub-module capacitor voltage balance control. The effect of balanced distribution of losses inside the waveform generator improves the operational reliability of the modular medium voltage waveform generator.

The embodiment of the invention provides a method for determining IO-BUS time sequence parameters of an input / output bus, which relates to the field of communication. The method comprises the steps: aThe embodiment of the invention provides a method for determining IO-BUS time sequence parameters of an input / output bus, which relates to the field of communication. The method comprises the steps: agroup of IO-BUS time sequence parameters is selected, initial values of the group of time sequence parameters are used as center values of dynamic scan, the initial values are regulated to a standard group of IO-BUS time sequence parameters is selected, initial values of the group of time sequence parameters are used as center values of dynamic scan, the initial values are regulated to a standard boundary, the time sequence parameter values of other groups of the IO-BUS are fixed, the IO-BUS time sequence parameters are configured by values of the initial values which are regulated to the staboundary, the time sequence parameter values of other groups of the IO-BUS are fixed, the IO-BUS time sequence parameters are configured by values of the initial values which are regulated to the standard boundary and the time sequence parameter values of other groups, the IO-BUS with the configured time sequence parameters accesses at least two addresses as standard time, and if the addresses arndard boundary and the time sequence parameter values of other groups, the IO-BUS with the configured time sequence parameters accesses at least two addresses as standard time, and if the addresses are successfully accessed in the standard time, the current values of the selected group of sequence parameters are used as determining values of the selected group of sequence parameters. The embodimene successfully accessed in the standard time, the current values of the selected group of sequence parameters are used as determining values of the selected group of sequence parameters. The embodiment of the invention also provides a corresponding device and can select proper IO-BUS time sequence parameters according to different individual differences and operating environments of single plates,t of the invention also provides a corresponding device and can select proper IO-BUS time sequence parameters according to different individual differences and operating environments of single plates, and consequently, the conflict between the operating efficiency and the operating stability can be effectively solved.and consequently, the conflict between the operating efficiency and the operating stability can be effectively solved.