33results about How to "Improve pressure regulation performance" patented technology

The invention relates to a series-parallel connection comprehensive compensation device for power distribution network low-voltage treatment. The series-parallel connection comprehensive compensation device comprises a series connection compensating module, a parallel connection compensating module, and a controller. The series connection compensating module is disposed in a main loop circuit and is connected with a rapid vacuum switch in the main loop circuit. The parallel connection compensating module is connected with the main loop circuit through a vacuum contactor. The controller is connected with the rapid vacuum switch and the vacuum contactor and is used for controlling the operation of the series connection compensating module and the parallel connection compensating module via the rapid vacuum switch and the vacuum contactor according to the voltage and the load at the tail end of a power distribution network system. Compared with a product in the prior art, the series-parallel connection comprehensive compensation device is simultaneously provided with the series connection compensating module and the parallel connection compensating module, comprehensively controls a series capacitor loop circuit and a parallel capacitor loop circuit according to a system requirement, may change circuit reactance and system reactive power flow, and may absorb harmonic waves so as to greatly enhance the voltage regulating capability and range of a device.

The invention discloses a tank typed large flow pressure adjuster suitable for a low pressure drip irrigation system belonging to the technical field of agricultural water-saving irrigation. The technical proposal includes a tank typed shell, a water inlet and a water outlet respectively arranged on a front side wall and a back side wall of the shell. The invention is characterized in that the shell is provided with a lifting frame with a floating ball floating up and down, wherein, the lifting frame includes an upstream baffle and a downstream baffle respectively near the front inner wall and back inner wall of the shell, and the upstream baffle and the downstream baffle are respectively provided with a water inlet through opening and a water outlet through opening corresponding to the water inlet and the water outlet. The invention has the advantages of good pressure adjusting performance, convenient installation and use, equal starting regulation pressure and outlet pressure (the outlet pressure is designed by the height of a water level in a water tank), simple structure, convenient manufacture, low cost, convenient maintenance, etc.

The invention provides a transformer on-load capacity-regulating voltage-regulating tap changer comprising a T-shaped support. The T-shaped support is composed of a horizontal part and a vertical part. An on-load regulation mechanism and an on-load voltage-regulating spindle barrel are disposed on two sides of a support plate of the horizontal part respectively. Two motors are disposed on the on-load regulation mechanism side of the support plate. An on-load capacity-regulating contact system of the tap changer comprises a capacity-regulating fixed contact, a capacity-regulating transition resistor and a capacity-regulating moving contact. An on-load voltage-regulating contact system of the tap changer comprises a voltage-regulating fixed contact, a voltage-regulating transition resistor and a voltage-regulating moving contact. Compared with the prior art, the transformer on-load capacity-regulating voltage-regulating tap changer is small in size and meets the requirement for large-range voltage regulation for 3-9 tap positions.

The invention relates to an axial flow pressure regulator. The axial flow pressure regulator comprises a valve body consisting of an upper shell with an air inlet and a lower shell with an air outlet, and a controller connected with the air inlet and the air outlet; an air accommodating cavity is formed in the valve body, and a balance membrane for separating the air accommodating cavity into an upper cavity and a lower cavity is arranged in the valve body; the upper cavity is communicated with the air outlet; the lower cavity is communicated with the controller; a sleeve is arranged in the valve body; the bottom of the sleeve is provided with a connected valve clack; the sleeve is connected with the valve body through a spring; the controller consists of a director for controlling air pressure and a pressure stabilizer matched with the director. The axial flow pressure regulator has the characteristics of simple structure, stable output pressure, good pressure control and regulation performance and the like.

The invention discloses a vacuum interrupter aging device based on real-time voltage regulation, including a base. The top of the base is fixedly connected with a case. A partition board is fixedly connected between the two sides of the inner wall of the case. The top of the partition board is fixedly connected with a voltage regulation box. A resistance coil rod and a guide copper bar are fixedlyconnected in sequence from top to bottom between the two sides of the inner wall of the voltage regulation box. The outer surface of the resistance coil rod is connected in a sliding manner with a first conductive copper sleeve. The outer surface of the guide copper bar is connected in a sliding manner with a second conductive copper sleeve. The invention relates to the technical field of electric power facilities. By using the vacuum interrupter aging device based on real-time voltage regulation, the precision of voltage regulation is greatly improved, the effect of voltage regulation is enhanced, high-precision mechanical voltage regulation on aging equipment is realized, the voltage of aging equipment can be regulated quickly and conveniently, and great convenience is brought to peoplein vacuum interrupter aging.

The invention discloses a gas pressure regulator. The gas pressure regulator comprises a valve body; the valve body comprises a gas inlet, a gas outlet and diversion cavity bodies, a cutting device and a pressure regulating device are arranged on valve body, and a first valve seat and a second valve seat are arranged on the valve body; the first diversion cavity body is formed in the position, located between the gas inlet and the first valve seat, of the valve body, the second diversion cavity body is formed in the position, located between the first valve seat and the second valve seat, andthe third diversion cavity body is formed in the position, located between the second valve seat and the gas outlet; a first connecting opening is formed in the valve body, the cutting device is detachably connected to the first connecting opening, the cutting valve rod of the cutting device is arranged in the first diversion cavity body in a penetrating mode, a cutting valve clack of the cuttingdevice is arranged at the front end of the cutting valve rod, and a second connecting opening is formed in the valve body; and the pressure regulating device is detachably connected to the second connecting opening, the pressure regulating valve rod of the pressure regulating device is arranged in the second diversion cavity body in a penetrating mode, and a pressure regulating valve clack of thepressure regulating device is arranged at the front end of the pressure regulating valve rod. The gas pressure regulator is simple in structure, convenient to assemble and sensitive in cutting action.

The invention relates to an inverse proportion pressure reduction electromagnetic valve of a stop iron and pole shoe integrated spherical piston structure. The inverse proportion pressure reduction electromagnetic valve comprises yoke iron, a gasket, a main spring, an armature, a connector, a film, a lower magnetic circuit board, a valve body, a piston, a reset spring, a valve seat, a coil and stop iron. The inverse proportion decompression electromagnetic valve of the stop iron and pole shoe integrated spherical piston structure is high in adjusting precision, small in pressure fluctuation, long in service life, high in anti-pollution capacity and good in manufacturing manufacturability.

The invention provides an ultra-wide gain range adjusting method of an L-LLC resonant converter, and is suitable for the fields of flexible direct current transmission, power distribution networks, new energy grid connection, storage battery energy storage and the like which use the wide voltage range L-LLC resonant converter. According to the method for adjusting the ultra-wide gain range of theL-LLC resonant converter, the wide-range voltage adjusting capacity is given to the L-LLC resonant converter, the good soft switching characteristic of the L-LLC resonant converter is guaranteed, andthe bridge arm control is optimized and the magnetic bias phenomenon introduced by the auxiliary inductor is eliminated according to the ultra-wide gain range adjusting method.

The invention relates to a controller, in particular to a novel controller for a gas pressure regulator, which comprises a gas inlet (1), a shell (2), a pressure stabilizer (A) and a director (B), wherein the pressure stabilizer (A) and the director (B) are arranged in the shell (2); the pressure stabilizer (A) comprises a pressure stabilizer valve port gasket (A5) and a pressure stabilizer valve port (A6); the director (B) comprises a third gas guide hole (B11), a director valve port (B4), a director valve port gasket (B5) and a director membrane (B7); the pressure stabilizer (A) is also provided with a first gas guide hole (A2) and a first channel (A11); one end of the first gas guide hole (A2) is communicated with the gas inlet (1); and the other end of the first gas guide hole (A2) is communicated with the pressure stabilizer valve port gasket (A5) through the first channel (A11). By adopting the technical scheme, the novel controller is stable in control output pressure and is better in control pressure regulating property.

The invention provides an LLC resonant converter with improved light load performance. The primary side of a topology based on a light load performance improvement technology comprises four switch tubes S1 to S4, a secondary side comprises four diodes D1 to D4, and the secondary side is connected with a load R through an output capacitor, wherein the diode D1 and the diode D3 are located on a same bridge arm, and the diode D2 and the diode D4 are located on the other bridge arm. The LLC resonant converter is characterized in that the secondary side further comprises a four-quadrant switch S5. In order to improve the light-load performance technology of the LLC resonant converter, a working mode suitable for a light-load condition is added through a circuit reconstruction method on the basis of a traditional LLC circuit, so that the problems of voltage regulation capability and low efficiency of the circuit under the light-load condition are solved, and the high-efficiency power transmission under different load conditions is realized.

The invention discloses a voltage regulator, which comprises a circuit part. The circuit part is respectively connected with a transistor and a central control unit. The central control unit is connected with a protecting circuit, the protecting circuit is connected with the transistor, and the central control unit is also connected with an excitation current controller; the circuit part comprises a voltage setting part, and a reference voltage set value is set; and a controlled transfer function is adopted by the central control unit after being optimized.

The invention relates to a stop iron and pole shoe integrated overflow type inverse proportion decompression electromagnetic valve with an unloading function. The stop iron and pole shoe integrated overflow type inverse proportion decompression electromagnetic valve comprises an adjusting screw, a gasket, stop iron, a film, an armature, a valve body, a bearing, an ejector rod, a valve seat, a steel ball, a ball valve body, a mounting valve body, an outlet filter screen, a ball valve seat, an inlet filter screen, an O-shaped ring, a coil, an adjusting spring, yoke iron and a connector. The stop iron and pole shoe integrated overflow type inverse proportion decompression electromagnetic valve with the unloading function is high in adjusting precision, small in pressure fluctuation, long in service life, good in anti-pollution capacity and good in manufacturing manufacturability.

The invention relates to a series pressure regulating chamber for a hydropower station. On the basis of a conventional pressure regulating chamber, pressure regulating chamber bodies are connected inseries, the cross sections of the pressure regulating chamber bodies are increased, the pressure regulating performance is improved, the water flow effect due to the water hammer inertia circulates between the pressure regulating chamber bodies and a connecting cylinder, and due to the narrowing effect of the different cross sections, energy consumption is reduced, the water hammer pressure is reduced, and the pressure regulating and stabilizing work of the pressure regulating chamber bodies is facilitated. The series pressure regulating chamber can be increased or decreased as needed, so thatthe pressure regulating chamber bodies with different adjusting performance can be arranged, the distance between the pressure regulating chamber bodies arranged in series can further be adjusted asneeded to improve the regulating performance of the pressure regulating chamber.

The invention relates to a stop iron and pole shoe integrated direct proportion pressure reduction electromagnetic valve of a spherical piston structure. The stop iron and pole shoe integrated direct proportion pressure reduction electromagnetic valve comprises an adjusting screw, a gasket, stop iron, a film, an armature, a valve body, a bearing, an ejector rod, a valve seat, a steel ball, a ball valve body, a mounting valve body, an outlet filter screen, a ball valve seat, an inlet filter screen, an O-shaped ring, a coil, an adjusting spring, a yoke, a connector and the like. The stop iron and pole shoe integrated direct proportion pressure reduction electromagnetic valve of the spherical piston structure is high in adjusting precision, small in pressure fluctuation, long in service life, high in anti-pollution capacity and good in manufacturing manufacturability.

The invention discloses a light load control method for energy feedback of a Buck-Boost LLC two-stage converter, and belongs to the technical field of power generation, power transformation or power distribution. In each light-load working period, the microcontroller configures a timer to enter an energy feedback control mode, generates a group of primary and secondary side switching signals withphase difference, and further respectively drives a primary side switching tube and a secondary side rectifying tube, so that the terminal voltage of the secondary side is turned over, and the energyof the load is transmitted back to the source through a resonance circuit. Therefore, the output voltage is reduced. After entering the energy feedback control mode, the energy in each period is partially fed back to the primary side. By adding phase adjustment, the problem of excessive output energy in a light load state is solved, the stability of output voltage is ensured, and the voltage regulation capability of the two-stage converter in the light load state is improved.

The invention discloses a double-EPR electric control system for a gas generator set, which comprises a gas pressure reducing system, a gas adjusting system and an electric control unit and sensor assembly. The gas pressure reducing system comprises a gas cylinder group (1), a gas filter (2) and a gas pressure adjusting valve (3) which are sequentially connected through a pipeline. The gas adjusting system comprises a fuel electromagnetic valve (4), a gas pressure stabilizer (5), a first EPR electric control pressure regulator (6), a second EPR electric control pressure regulator (7), a first mixer (8), a second mixer (9) and an engine supercharger (11). The electronic control unit and sensor assembly comprise an ECU (electronic control unit) (15). The double-EPR electric control system for the gas generator set has the beneficial effects that high-responsiveness and high-precision closed-loop regulation control on the gas pressure and the gas inflow of the inlet of the gas engine can be realized, so that stable operation of the gas generator set under different application conditions is ensured.

The invention discloses a transformer convenient for voltage regulation. The transformer comprises a shell, a transformer body, a moving rod and a regulating assembly, the transformer body comprises a first iron core, a second iron core, a primary coil and a secondary coil, the adjusting assembly comprises a conductive pulley, a spring, a first connecting rod, a second connecting rod and a sliding seat, the sliding seat is slidably connected with the moving rod, one end of the first connecting rod is fixedly connected to the sliding seat, and the second connecting rod is hollow to form a sliding through hole; the other end of the first connecting rod is sleeved with the sliding through hole, the first connecting rod comprises a first connecting part connected with the sliding seat through a spring and a second connecting part rotationally connected with the conductive pulley, and the wire penetrates through the first connecting rod, the second connecting rod and the sliding seat to form a fourth wiring part; according to the technical scheme, by arranging the conductive pulley and the spring, damage to the secondary coil during voltage adjustment is reduced, and tight connection between the conductive pulley and the secondary coil is achieved.

Provided is a fuel supplying device which can regulates pressure for each voltage regulator with a cheap structure and has excellent noise silencing performance. A fuel passage 14d and a return passage 80 are arranged in a flange portion 50, wherein the fuel passage 14d sends fuel to the outside of a fuel tank 2, and the return passage 80 returns fuel flowing by the fuel passage 14d back to the fuel tank 2. A support 16d is arranged on the voltage regulator in the return passage 80, and retains an elastic supported spring 16c on a fuel inlet of the return passage 80. The support can be retained on the flange portion 50 of the return passage 80 on a movable area E along the telescoping direction of the spring 16c.

The present invention provides a fuel pressure adjusting device, capable of implementing small-diameter resinification of fuel piping without a design problem of laying the fuel piping, and reducing cost. The fuel pressure adjusting device (40) is arranged on a fuel piping (30) for supplying fuel compressed by a fuel pump (29) to a fuel injection device (26), wherein at least a part of the fuel piping (30) is telescopic in a fuel passage direction or in a direction that is vertical to the fuel passage direction, so as to increase or decrease a volume of the fuel passage in the telescopic part to restrain the pressure of the fuel piping (30) from fluctuation.