38results about How to "Accurate pressure regulation" patented technology

The invention provides a pressure control device and a pressure increasing and decreasing control method. The pressure control device comprises a power assembly, a transmission assembly and a pressureregulating valve connected in sequence, wherein under the condition that a bidirectional clutch in the transmission assembly is in a first transmission state, when the power assembly moves in the first direction, the bidirectional clutch is engaged to drive the pressure regulating valve to carry out pressurization action, and when the power assembly is reversely reset in the second direction, thebidirectional clutch is separated; under the condition that the bidirectional clutch is in a second transmission state, when the power assembly moves in the second direction, the bidirectional clutchis engaged to drive the pressure regulating valve to perform pressure reduction action, and when the power assembly is reversely reset in the first direction, the bidirectional clutch is separated. By the adoption of the bidirectional clutch, the process of increasing and reducing the pressure of a hydraulic system is realized, the structural assemblies are simplified, and the equipment utilization rate is high; and the pressure control device has the advantages that pressure regulating operation is simple and convenient, occupied mounting space is small, the structural cost is low and energyconsumption is low.

The invention discloses a fluid-structure interaction analog simulation test device, which comprises a rack, a simulation box body, a vertical direction hydraulic loading system and a horizontal direction hydraulic loading system, wherein the rack comprises a base, an upright post, a cross beam and a guide rail; the base is glidingly arranged on the guide rail through the lower surface; the vertical direction hydraulic loading system comprises a first telescopic pressurization device and an upper pressurizing plate; the first telescopic pressurization device performs vertical pressure loading on the simulation box body through the upper pressurization plate; the horizontal direction hydraulic loading system comprises a second telescopic pressurization device, a pressure resistant plate and a lateral pressurization plate; the pressure resistant plate and the side pressurization plate are respectively arranged at the two ends of the second telescopic pressurization device; the second telescopic pressurization device performs the lateral pressure loading on the simulation box body through the butt joint with the simulation box body through the lateral pressurization plate. The test device has the advantages that the horizontal hydraulic loading is modularized; each module can realize the single pressure control; the precise pressure regulation is realized; the top vertical pressurization is controllable; different depth load of the stratum is simulated; non-uniform pressure can be exerted.

The invention provides a pressure adjusting spring. The spring comprises a spring body, a pressure adjusting mechanism is arranged above the spring body, the pressure adjusting mechanism comprises a base plate, the bottom end of the base plate is fixedly connected with the top end of the spring body, a movable bin is formed in the top of the base plate, a ring groove is formed in the side edge of the base plate, an extension rod vertically penetrates through the interior of the base plate, a rotary cover is fixedly connected to the position, located above the base plate, of the top end of the extension rod, the outer surface of the base plate is connected with the rotary cover in a sleeving mode, a limiting ring is fixedly connected to the lower end of the inner surface of the rotary cover, one end, located in the movable bin, of the extension rod penetrates through the rotary cover to be connected with an output shaft of a motor, the extension rod and the limiting rod fixed to the bottom end of the extension rod can be driven when the motor is started, in the limiting rod rotating process, the upper end of the spring body is folded and extruded between the limiting rod and the base plate, and therefore pressure adjusting of the spring is achieved, and accurate pressure adjusting can be achieved by folding the spring bodies of different lengths.

The invention discloses a speed regulation control method of air conditioner outdoor fan. The method uses the temperature of conditioner outdoor coil pipe to reflect the system pressure. The RPM regulation and control strategy of the outdoor fan is designed base on the combinational factors of changes of the outdoor environmental temperature and the outdoor coil pipe temperature. Through the control of outdoor fan RPM the outdoor coil pipe temperature can be regulated. Through controlling the outdoor coil pipe temperature within the set range of temperature the system pressure can be stabilized within the scope of the reliable operation of the compressor, therefore the safe operation of the compressor can be guaranteed. Because the precise regulation of the PRM of the outdoor fan can be achieved without the unnecessary pressure sensor installation in the air conditioner system for collecting the system pressure, so the accruement of hardware cost of the product can be avoided. At the same time the stepless speed regulation is used in the outdoor fan to enhance the stability of the system pressure control, and improve the air conditioning system work performance. The method is especially useful for the base station air conditioner to enhance the system operation reliability of the base station air conditioner.

The invention discloses a high-voltage adjustable transformer with an over-travel protection function.The high-voltage adjustable transformer comprises a rotor shaft, a first reduction gearbox, a second reduction gearbox and a voltage collector.The rotor shaft is led out of the upper end of a body of the transformer, and a rotor gear is arranged at the upper end of the rotor shaft.A motor is arranged on the first reduction gearbox, and an output shaft of the motor is connected with an input shaft of the first reduction gearbox.The second reduction gearbox is erected at the upper end of the rotor gear, an electromagnetic clutch is arranged on the second reduction gearbox and connected with the input end of the second reduction gearbox, an input end gear of the second reduction gearbox is selectively connected with an output shaft of the first reduction gearbox, and the output end of the second reduction gearbox is provided with a linkage plate connected with the rotor gear in an engaged mode.The voltage collector is arranged at the output end of the transformer.The technical problem that output voltages cannot be precisely controlled due to over-rotation of the rotor shaft is solved through the transformer.

The invention belongs to the technical field of power voltage regulation, and specifically relates to an automatic voltage regulation device for a substation, which is suitable for a substation. The voltage regulation device includes a sampling and storage unit for sampling voltage information connected to a substation. The sampling and storage unit samples the output voltage of the substation transformer main body voltage output terminal through the sampling circuit, and transmits the information to the processing unit, and the processing unit transmits the information to the control unit, and the control unit compares the received information with the set voltage reference value The parameters are compared, and when the output voltage is not within the range of the voltage reference value, the control unit controls the drive module of the on-load tap changer to drive the motor to perform forward and reverse motions to realize the lifting of the switch gear. The device realizes the automatic, fast and accurate pressure regulation of the station transformer.