40results about How to "Achieve buck" patented technology

The invention relates to a low-temperature hydraulic residual pressure power generation technology, in particular to an integrated totally-closed low-temperature hydraulic power generation device. Inorder to solve the technical problem that only energy can be recycled by an existing low-temperature hydraulic power generation device and energy conversion cannot be achieved, the integrated totally-closed low-temperature hydraulic power generation device provided by the invention comprises a turbine enclosure, a power generation enclosure, a main shaft, a liquid inlet runner and a liquid outletrunner, wherein one end of the power generation enclosure is connected with the turbine enclosure by an intermediate segment enclosure, the other end of the power generation enclosure is connected with an enclosure end cover, a support segment is further arranged in the intermediate segment enclosure, the main shaft penetrates through the support segment and is arranged between the turbine enclosure and the enclosure end cover, a turbine is arranged on the main shaft, a guide vane is fixedly connected with an inner wall of the turbine enclosure, an excitation machine stator winding and a powergenerator stator winding are arranged in the power generation enclosure, a excitation machine rotor winding and a power generator rotor winding are arranged on the main shaft, and the power generation enclosure communicates with a liquid outlet runner by a backflow pipe. By the device, leakage is prevented, and meanwhile, mechanical energy can be converted to electric energy to be output.

The invention provides a tool for reducing the equivalent circulating density. The tool comprises an outer cylinder, a one-way check valve assembly, an inner shell and a piston rod, wherein the outercylinder is put in a borehole, and a first annulus is formed between the outer cylinder and the borehole; the outer cylinder is sleeved with a sealing mechanism sealed on the inner wall of the borehole, and the first annulus is separated into an upper annulus and a lower annulus; the sidewall close to the upper end of the outer cylinder is provided with jet holes communicating with the upper annulus, and the sidewall close to the lower end of the outer cylinder is provided with inflow holes communicating with the lower annulus; the one-way check valve assembly is arranged in the outer cylinder, the inner shell is connected with the lower end of the one-way check valve assembly , and a second annulus is formed between the inner shell and the outer cylinder; the sidewall of the inner shell is provided with pressure relief holes, and the bottom wall of the inner shell is provided with a through hole; the piston rod is arranged in the inner shell, the lower end of the piston rod is arranged in the through hole in a penetrating manner, and a piston is arranged at the upper end of the piston rod; and a first flow channel is arranged in the piston, and a second flow channel communicatingwith the first flow channel in a butt joint manner is arranged in the piston rod. The tool for reducing the equivalent circulating density can reduce the equivalent circulating density, realizes the purpose of depressurization and guarantees safe and efficient well drilling.

The invention provides a pull-out folding storage device for textile cloth transportation, which relates to the technical field of folding storage, comprising: a box body, an inner bottom of the box body is integrally provided with an air plate in the middle, and the sides of the air plate are provided with an air plate. Radial through holes are provided; guide grooves are fixedly arranged at the rear ends of the inner walls on both sides of the box body, and the top of the guide groove is set as a limit structure; the lifting bar and the pressing link according to the various embodiments of the present invention are provided for the storage device. In order to assist the folding and unfolding effect, the fabric or textile product is wound through the hinge shafts of different connecting rods in turn, and the connecting rod is pressed to form a folded state, and the fabric or textile product is stored in a folded state inside the box to achieve storage. , and the cloth or textile product can be unfolded while pulling out the clothespin, which solves the problem that the currently used storage device mainly rolls or stacks the fabric to realize storage, and does not have an auxiliary folding structure for convenient combing and unfolding.

The invention discloses a parallel structure hybrid excitation brushless motor and its power generation system, comprising a parallel structure hybrid excitation brushless motor, a power converter, a power supply, an uncontrollable rectifier, a DC electrical load and an AC electrical load. The parallel structure hybrid excitation brushless motor includes a permanent magnet synchronous motor and an electric excitation synchronous reluctance motor arranged in parallel with a common rotating shaft; the permanent magnet synchronous motor includes an armature stator, a synchronous rotor and a permanent magnet; the armature stator is wound with an armature winding 1. The electric excitation synchronous reluctance motor includes an excitation stator and a reluctance rotor; the excitation stator is wound with two armature windings and an AC excitation winding, and the first and two phases of the armature winding are connected in series to form the total armature winding; the poles of the synchronous rotor are The number of pole pairs is equal to that of the reluctance rotor. By adjusting the magnitude and direction of the direct axis excitation current in the excitation winding, the voltage regulation of the total armature winding can be achieved. The invention has the advantages of high power density, adjustable magnetic field and no coupling between the excitation magnetic field and the permanent magnetic field.

The invention provides novel electric heating equipment capable of efficiently saving energy. The novel electric heating equipment comprises a working box, a liquid delivery mechanism, an energy-saving auxiliary mechanism, a heating mechanism, a temperature display mechanism and a pressure relieving mechanism; a liquid draining pipe is installed on the lower portion of the working box, an exhaust outlet is formed in the top of the working box, and multiple condensing nets are installed on the upper portion of the working box; the liquid delivery mechanism comprises a liquid delivery device and a spray head, the liquid delivery device is installed on the upper portion of the working box, and the spray head is installed on the liquid delivery device and located over the condensing nets; the heating mechanism is installed on the lower portion of the working box; the temperature display mechanism comprises a transparent liquid storing pipe and a first sliding block, the transparent liquid storing pipe is partially located in the working box, and the first sliding block is movably installed in the transparent liquid storing pipe and matched with the transparent liquid storing pipe in a liquid sealing mode; the pressure relieving mechanism comprises multiple moving rods, multiple first reset parts and an obstruction block. The novel electric heating equipment is convenient to use, good in energy saving effect and high in safety.

The invention discloses a vehicle evaporation emission system desorption flow failure detection device, method and vehicle. The device includes: ECU, pressure sensor, throttle hole, switching valve, first vacuum pipeline, second vacuum pipeline and third vacuum tube The diameter of the orifice is smaller than the inner diameter of the second vacuum pipeline, one end of the first vacuum pipeline is connected to the atmosphere, the other end of the first vacuum pipeline is connected to the first end of the switching valve, and the orifice is set on the first vacuum pipeline , one end of the second vacuum line is connected to the atmosphere, the other end of the second vacuum line is connected to the second end of the switching valve, one end of the third vacuum line is connected to the third end of the switching valve, and the other end of the third vacuum line is connected to the The atmospheric communication port of the activated carbon tank of the vehicle is connected, or connected with the air inlet of the desorption control valve of the vehicle, and the pressure sensor is arranged on the third vacuum pipeline. This device improves the detection accuracy of the desorption flow failure of the vehicle evaporative emission system. sex.

The invention belongs to the technical field of refrigeration, and particularly relates to a refrigerant compressor oil circulation rate measuring and testing device based on intermiscibility. The device comprises an oil separation assembly which is provided with an oil outlet end and a refrigerant outlet end, the refrigerant outlet end is at least communicated with a compressor air suction port end at least through a condenser, a liquid storage device and an evaporator to form a refrigerant loop, the oil outlet end is communicated with a compressor air suction oil return port to form an oil circulation loop, and flow meters are arranged on the oil circulation loop and the refrigerant loop. The device further comprises a refrigeration assembly, and liquid supply temperature of the refrigeration assembly is lower than the highest two-phase separation temperature of a refrigerant and refrigerator oil. The device improves work efficiency of a whole oil circulation system, meanwhile, values measured by the flow meters on the loops are more accurate, and finally precision of oil circulation flow rate measurement data of a refrigerant compressor is guaranteed.

The invention relates to a parallel type advection plunger pump, which comprises a drive transmission module (1), a cylinder body plunger module (2) and a complete machine support (3). The parallel type advection plunger pump provided by the invention can be used for accurately and quantitatively conveying a required liquid, and a liquid flow is not influenced by backward-stage pressure fluctuation, so that the liquid is ensured to be output continuously and stably. The device provided by the invention is mainly used in a water purification system in an environmental control and life support subsystem in a space station, provides current-rated water to be treated to a purifier, can ensure the output accuracy to be unaffected when the pressure in the purifier is changed, and has the characteristics of accuracy in supplying, capability of being unaffected by backward-stage pressure, high output efficiency and output continuousness. The device provided by the invention adopts a novel series seal structure, so that the product processing difficulty is reduced, the product accuracy is ensured, the requirements on sealing reliability and long service life of the plunger pump are met, thereliable operation of a water purification system is ensured, and a special working condition demand can be met.

The invention discloses a three-phase isolated AC-DC converter, which includes three parts: a primary side, a secondary side and a resonant network. The upper and lower bridge arms of each phase on the primary side adopt a group of common-source anti-series switch tubes with the same structure, the resonant network adopts an LLC series resonant structure, and the rectifier side of the secondary side adopts a rectifier circuit. The power device of the primary circuit of this topology can realize zero-voltage soft turn-on (ZVS), and can realize the function of power factor correction technology (PFC) at the same time. The converter combines power factor correction technology and resonant soft switching technology, so that the input current of the converter follows the input voltage well and realizes the PFC function; the converter realizes stable DC voltage output by controlling the output voltage; at the same time, the The converter has a high-frequency transformer for electrical isolation.