71results about How to "Solve the problem of cavitation" patented technology

The invention discloses a serial axial-flow water jet propulsion pump which comprises a water suction elbow (1), a pump shaft (7), an impeller chamber (6), an inducer (2) and a main impeller (3), wherein the inducer (2) and the main impeller (3) are positioned in the impeller chamber (6); the pump shaft (7) is horizontally arranged; the inducer (2) and the main impeller (3) are fixed on the pump shaft (7) through keys; the outlet of the water suction elbow (1) is connected with the inlet of the inducer (2); the outlet of the main impeller (3) is orderly connected with a rectifier (4) and a jet pipe (5); and the area of the overflowing cross section gradually reduces along the central line of the flow channel to form a contracting flow channel. The invention avoids cavitation in the main impeller, solves the problems of cavitation under the operating conditions of large thrust and high speed of the water jet propulsion pump and reduces the axial size of the propulsion pump.

The invention relates to an MTP (methanol to propylene) separation device and a novel separation process adopted by the MTP device. The novel separation process comprises the steps that quenched reaction gas is pressurized by a compressor and undergoes washing and alkali wash treatment on a third compression section, a gas phase at the outlet of a fourth compression section goes to a depropanizer and a liquid phase goes to a debutanizer, water phases of separating tanks among the sections of the compressor return to a quench tower, and a hydrocarbon phase is sent to a separating tank at the outlet of the fourth compression section after being pressurized; the materials ejected from the debutanizer go to the depropanizer and the materials discharged from tower reactors enter a dehexanizer; a deethanizer compressor is arranged between a deethanizer and an oil absorption tower, the oil absorption tower adopts recycle propane or C4 as an absorbing solvent, fuel gas excluding C2 is obtained at the tower tops, the materials discharged from the tower reactors go to a stripping tower to recover the propane or C4 solvent, and the materials ejected from the stripping tower go to an ethylene rectification tower, thus obtaining the byproduct ethylene. The novel separation process has the effects that the process flow can be effectively optimized; the energy consumption of systems, the pipeline corrosion and the cost of investment can be effectively reduced.

The invention discloses a double-jet refrigerating system, belonging to the technical filed of energy and refrigeration. The system is characterized by replacing a mechanical pump with a steam-liquid injector on the basis of a traditional single jet refrigerating system. The outlet end of a generator 4 is respectively connected with the working steam inlet end of a steam-steam injector 5 and the working steam inlet end of the steam-liquid injector 2 through pipelines. The outlet end of a condenser 7 is divided into two paths to respectively connect with an expansion valve 8 and the injection port of the steam-liquid injector 2. The outlet of an evaporator 6 is connected with the injection port of the steam-steam injector 5. The fluid at the outlet of the steam-liquid injector 2 flows back to the generator 4 through pipelines. The invention has the effects and benefits of reducing moving parts, avoiding the cavitation corrosion problem of the mechanical pump and saving electric energy.

The invention provides an axial flow device comprising a shell and a transmission device. The shell is provided with the transmission device and is internally provided with a shell cavity; a vortex tube impeller is arranged in the shell cavity; the transmission device is connected with a vortex tube impeller; the vortex tube impeller is provided with a vortex tube which is provided with an impeller opening A and an impeller opening B and is internally provided with a wheel body, and the wheel body is provided with a guide blade; an inclined angle is formed between the guide blade and a rotating shaft of the vortex tube impeller; the guide blade is connected to the inner wall of the vortex tube; a shell cavity opening A is arranged at one end, which corresponds to the impeller opening A, of the shell cavity; and a shell cavity opening B is arranged at the other end of the shell cavity. The axial flow device is more energy-saving and can be used for pressurizing and conveying fluid. The axial flow device can serve as a water pump, vacuum equipment, air suction equipment, an air blower, a compressor, atomizing equipment, sprinkling equipment, a reactor, air blowing equipment, propelling equipment, a sewage processor, a dust remover, a dust collector, dressing equipment, a steam turbine, a water turbine, a wind turbine, a vortex pressurizing device utilizing residual heat of an engine, foam material manufacturing equipment, nano material manufacturing equipment and the like; and the axial flow device can be used for manufacturing a brand new foam material.

The invention provides a capsizing-resistant hydraulic power type ship elevator with a stable balanced hydraulic driving system. The ship elevator comprises a ship bearing compartment arranged in a lock chamber, a mechanical lifting system and the stable balanced hydraulic driving system, wherein the mechanical lifting system and the stable balanced hydraulic driving system are connected with the ship bearing compartment. The stable balanced hydraulic driving system comprises vertical shafts, float bowls arranged in the vertical shafts, a main water conveying pipe with a water conveying valve, and a plurality of branch water pipes with lower ends connected with the main water conveying pipe. Each branch water pipe is formed by a straight pipe of the lower portion, a corner pipe and/or a branch pipe in the middle, and a straight pipe of the upper portion, wherein the water outlet end of the straight pipe of the upper portion is arranged at the bottom of the corresponding vertical shaft, and an energy dissipater is arranged at the water outlet end of the straight pipe. All the vertical shafts are connected through a water level balance gallery. The ship elevator is characterized in that the stable balanced hydraulic driving system further comprises first resistance balancing parts arranged at the corners of the branch water pipes, or/and second resistance balancing parts arranged on the branch pipes, a circumferential direction reinforcing ventilating mechanism arranged in front of the water conveying valve of the main water conveying pipe, and a pressure stabilizing and vibration damping box arranged behind the water conveying valve of the main water conveying pipe. The ship elevator has a high capsizing-resistant ability.

The invention discloses an injection organic Rankine flash evaporation combined cooling and power supply system. The system comprises a gas-liquid separator, a high-pressure expansion machine, a low-pressure expansion machine, a power generator, a pressure reducing valve, a flash evaporation tank, an extraction regulating valve, a refrigeration ejector, an injection regenerator, a condenser, a low-pressure working medium pump, a high-pressure working medium pump, a generator, an evaporator and a throttle valve; low-grade heat energy is connected with the generator, and a circulating working medium in the generator is heated; the high-pressure expansion machine, the low-pressure expansion machine and the power generator are coaxially connected to drive the power generator to generate electricity; and the circulating working medium evaporates and absorbs heat in the evaporator to obtain cold energy. An organic Rankine flash evaporation system, an injection regenerative system and an injection refrigeration system are coupled, so that the power consumption of the working medium pumps is reduced, the energy utilization efficiency is improved, and the system has the advantages of beingsimple in structure, remarkable in energy saving effect, convenient to control and the like.

The invention discloses a sidestream shield pump for conveying a gas-liquid mixing medium, and relates to the technical field of shield pumps. The sidestream shield pump for conveying the gas-liquid mixing medium comprises a pump part and a motor, wherein the pump and the motor share one central shaft; a pump cavity communicates with a motor cavity; the pump part is provided with a suction section, a first stage impeller, a secondary stage impeller, a secondary guide vane and a discharging section; the suction section and the discharging section are located at the first end and the tail end ofthe pump part; and the secondary stage impeller and the secondary guide vane are fixedly arranged on the central shaft. The shield pump provided by the invention is provided with an impeller assemblycapable of conveying a liquid and conveying a gas, so that gas-liquid mixing conveying is realized; and meanwhile, a pressure flowing relationship of the gas and the liquid is utilized to enable theliquid to flow through the motor and be used as a circulating fluid for cooling the motor and lubricating a bearing.

The invention discloses a high-pressure water tunnel test device and a test method thereof. The high-pressure water tunnel test device comprises a water tunnel test section, a shaftless propelling device, an air supply pipeline, air supply equipment, a pressure-regulating cavitation-removing device, reducing and expanding sections and accelerating pipelines. The two ends of the water tunnel test section are respectively connected with a reducing pipeline and a expanding pipeline and are externally connected with the accelerating pipelines, and the pipelines form a closed loop. One or more shaftless propelling devices are dispersedly arranged on the water tunnel acceleration pipeline. If there are a plurality of shaftless propelling devices, the multiple shaftless propelling devices are dispersed and distributed in the whole course of the acceleration pipeline. The air supply equipment and the air supply pipeline are arranged outside a water tunnel pipeline to provide a power working medium for the shaftless propelling devices. According to the system, the flow and the flow speed of an existing water tunnel system can be remarkably improved, the energy supply problem of high-power equipment is solved, input energy is efficiently converted into the water flow speed, meanwhile, the high-pressure state under the deep sea condition can be simulated, and the cavitation problem caused by high-speed water flow is effectively solved.

The invention provides a swirler. The swirler comprises a shell and a transmission shaft, wherein the transmission shaft is arranged in the shell; at least one swirling wheel is arranged in the shell; the transmission shaft is connected with the swirling wheel; a swirling chamber is arranged in the swirling wheel; the middle part of the swirling chamber is provided with a swirling chamber inlet; the periphery of the swirling chamber is provided with a plurality of guide vanes; and the shell is provided with an inlet. The swirler makes full use of circumferential motion and fluid motion, causes fluid to be automatically sucked into eddy current from an eddy current central region by using the eddy current of which a rotational speed is steadily increased from a center to the periphery, produces a suction force by the center of the eddy current, produces high pressure at the periphery of the eddy current by the eddy current of which the rotational speed is gradually decreased from the center to the periphery, can be widely applied in the fields of fluid pressurizing, delivering and the like, can be used as a water pump, a vacuum pump, air suction equipment, a fan, a compressor and the like, and also can be used as spraying equipment, an atomizer, a reactor and the like.

The invention discloses an eddy current supercharger. The eddy current supercharger comprises a shell and a transmission shaft, wherein a shell cavity is formed in the shell; the transmission shaft is arranged in the shell; an eddy current wheel is arranged in the shell cavity; the transmission shaft is connected with the eddy current wheel in which an eddy current chamber is formed; the middle part of the eddy current chamber is provided with an eddy current chamber inlet; the periphery of the eddy current chamber is provided with an eddy current chamber outlet; the shell cavity is provided with a shell cavity inlet; the eddy current chamber inlet is formed opposite to the shell cavity inlet; and the shell cavity is provided with a shell cavity outlet. In the eddy current supercharger, completely new supercharging principle and method are adopted, circular motion and fluid motion can be fully utilized, fluid is automatically sucked into an eddy current from an eddy current central region by using the eddy current of which the rotation speed gradually increases from the center to the periphery, super-high suction is produced by using the center of the eddy current, and super-high pressure is produced by using the periphery of the eddy current. The eddy current supercharger can be widely used in the fields such as fluid pressurizing, fluid conveying, air suction and the like, can be used as a water pump, a fan, a compressor, a vacuum machine and the like, and can also be used as spray equipment, a nanomaterial atomizer, purification equipment for processing carbon dioxide, sulfur oxide and nitric oxide, a special reactor, an air conditioner and the like.

The invention relates to an aqueous medium mining electromagnetic unloading valve. The aqueous medium mining electromagnetic unloading valve comprises a valve body, a pressure increasing valve elementand an unloading valve element, wherein one side of the valve body is provided with a liquid inlet, and the other side of the valve body is provided with a liquid outlet and an unloading port; the valve body is internally provided with a first cavity communicating with the liquid inlet, a second cavity communicating with the first cavity and the liquid outlet and a third cavity communicating withthe first cavity and the unloading port; the pressure increasing valve element is arranged in the second cavity and is pushed by pressure of a medium in the first cavity to move to communicate with or close the liquid outlet; the unloading valve element is arranged in the third cavity; when the unloading valve element is in an opening state, the unloading valve element is pushed by the pressure of the medium in the first cavity to move to communicate with or close the unloading port; and the medium flowing in the valve body is water. The working medium of the aqueous medium mining electromagnetic unloading valve is water. On the one hand, application of emulsified liquid is avoided, and the cost is reduced; and on the other hand, water is adopted as the working medium, pollution can be avoided, and water does no harm to the environment.

The invention provides a reducing and sudden expansion type inner energy dissipater. The energy dissipater consists of a matrix and an overflow hole arranged in the matrix, wherein, the overflow hole is in a contractible cone frustum shape, the inlet of the overflow hole is bigger than the outlet of the overflow hole, the diameter of the inlet of the overflow hole is equal to the diameter D1 of a flood discharge hole, the diameter D2 of the outlet of the overflow hole is equal to 0.1D1-0.7D1, and the overflow hole and the matrix have the equal length of L0 which is equal to 0.4D1-2.5D1. The reducing and sudden expansion type inner energy dissipater can be applied to energy dissipation in the pressured flood discharge hole; when in use, at least one reducing and sudden expansion type inner energy dissipater is arranged in the pressured flood discharge hole; and in the case of at least two reducing and sudden expansion type inner energy dissipaters, the distance between two neighboring energy dissipaters is at least 2D1, wherein, D1 is the diameter of the flood discharge hole.

The invention relates to a circulator, comprising a housing and a transmission gear, wherein a circulation cavity is arranged in the housing; a transmission gear is mounted on the housing; a rotating wheel is arranged in the housing; the transmission gear and the rotating wheel are connected with each other, the circulating cavity is internally provided with a circulating cavity inlet and a circulating cavity outlet; the circulating cavity expands gradually from one end to the other end, and an isolator is arranged in the housing between the circulating cavity inlet and the circulating cavity outlet. The circulator makes full use of circular motion and fluid motion, can better convert torsion force into pressure or thrust force through fluid, and better convert pressure or thrust force into torsion force through fluid. Moreover, particle mixing is realized through eddy flow, and chemical reaction becomes more sufficient by utilizing eddy flow. The circulator can be used as water pumps, slurry pumps, sewage pumps, blower fans, compressors, spraying equipment, atomizers, reactors, water turbines, steam turbines, wind turbines, vacuum equipment, foam material production equipment, nanometer material equipment and the like. The circulator provided by the invention has the advantages of high efficiency, low abrasion, etc., can be used for manufacturing fire-new foam material, and can usher in material revolution.

The invention provides a power station energy storing and heating peak valley adjusting system. The system comprises a deoxidizing device, a deoxidizing water tank, a deoxidizing device water supply pipeline, a water tank water supply pipeline, a by-pass adjusting pipeline, a steam balancing pipeline and a steam supplementing pipeline. The deoxidizing device is located at a high position. The lower end of the deoxidizing device is connected with the deoxidizing device water supply pipeline which is used for supplying water to a boiler. The upper end of the deoxidizing device is connected withthe steam balancing pipeline. The steam balancing pipeline is connected with the deoxidizing water tank and the steam supplementing pipeline. The steam supplementing pipeline is connected to a heatingfemale pipe. The deoxidizing water tank is located at the low position. The deoxidizing water tank comprises a tank body. A gas input valve is arranged at the upper end of the tank body and is connected with the steam balancing pipeline. A water supply valve is arranged at the lower end of the tank body. A hot water pump is connected to the water supply valve. The system has the advantages of being stable in operation, high in heating ability, high in energy source utilization rate, safe and environmentally friendly.

The invention discloses a condenser steam jet vacuum system which comprises a condenser pipeline connected with a condenser, a steam ejector set formed by at least a steam ejector I and a steam ejector II, and a condenser set formed by at least a condenser I and a condenser II. Power steam inlets of the steam ejector I and the steam ejector II are connected into power steam. Steam is used as media of the steam ejector I, and supersonic jet is produced through a power nozzle, so a head cavity is vaccumized to extract steam-gas mixtures in the condensers, the steam-gas mixtures exported from the condensers are mixed with the power steam and then are ejected into the condenser I through the steam ejector I to be processed in a condensed mode and finally are sucked in by the steam ejector II to be reprocessed. The condenser steam jet vacuum system is simple in structure and low in transformation cost, and can thoroughly solve the problem of unit efficiency reduction brought by vacuum pump cavitation.

A fully formulated coolant for a heavy-duty engine adopts propylene glycol and ethylene glycol as basic liquids and compounds various composite additives including ethanol as an auxiliary, an inhibitor, an inhibition auxiliary, a rust inhibitor, deionized water and an antifoamer. The fully formulated coolant for the heavy-duty engine, disclosed by the invention, adopts an organic acid collaborative protection technique to solve the cavitation corrosion problem of a diesel engine cylinder so as to enhance protection capability, has excellent corrosion and rust resistance, storage stability, hard water resistance, cylinder cavitation corrosion protection and scale prevention, does not require a periodically compensated additive, has good thermostability and anti-foaming performance, is stable in form and outstanding in cooling effect, can prolong the service life, and can meet use requirements of a cooling system for a large-power and heavy-duty engine.

The invention discloses an air conditioner. The air conditioner comprises a compressor, a first heat exchanger, a coolant pump and a second heat exchanger, wherein the compressor, the first heat exchanger, the coolant pump and the second heat exchanger communicate with one another in sequence to form a coolant circulation loop; the air conditioner further comprises a flash evaporation bypass one-way valve; one end of the flash evaporation bypass one-way valve communicates with the outlet of the coolant pump; the other end of the flash evaporation bypass one-way valve communicates with the inlet of the first heat exchanger; when the flash evaporation bypass one-way valve is opened, the compressor is shut down; and the coolant pump, the flash evaporation bypass one-way valve and the first heat exchanger form an internal loop. The invention further discloses a control method of the air conditioner, and a computer readable storage medium. The air conditioner disclosed by the invention caneliminate the phenomenon of flash evaporation, caused by sudden reduction of the pressure of a coolant, of the air conditioner after the compressor is shut down and the coolant pump runs.

The invention relates to a heat energy circulating system of a coating production line, which comprises a heating water tank of a pre-treatment system of the coating production line and a drying box of a drying facility of the coating production line, wherein a stainless steel inner container and a combustor are fixed in a furnace body; the combustor is fixed to the lower part of the stainless steel inner container; an air outlet of a circulating calorifier is communicated with the furnace body; an atmosphere communicating vent opening into atmosphere directly is arranged at the top of the furnace body; a water outlet pipe and a return pipe are arranged on the stainless steel inner container; a hot-water circulating pump is arranged on the water outlet pipe; the water outlet pipe is communicated with hot-water inlets of the heating water tank of the pre-treatment system of the coating production line and the drying box of the drying facility of the coating production line; and hot-water outlets of the heating water tank of the pre-treatment system of the coating production line and the drying box of the drying facility of the coating production line are communicated with the return pipe. The heat energy circulating system has the advantages of completely eradicating the phenomenon of the negative pressure of a loop and a water outlet pipe and solving the problems of the cavitation of the water circulating pump and the water attack of the system along with good anti-explosion performance and convenient overhauling.

The embodiment of the invention provides a hydraulic system, an excavator and a control method, and relates to the engineering equipment technology field. The hydraulic system comprises a controller,a power pump, an electric control stop valve, an oil inlet pipe and an oil tank. The electric control stop valve is arranged on a pipeline of the power pump and the oil tank, the oil inlet pipe is connected with the power pump, hydraulic oil in the oil tank is pumped into the oil inlet pipe through the power pump, and the oil inlet pipe is used for being connected with a breaking hammer so as to supply oil to the breaking hammer. When maintenance is needed, the oil tank can be separated from the pipeline only through closing the electric control stop valve, the hydraulic oil of a whole machinedoes not need to be pumped, secondary pollution to the hydraulic oil in a maintenance process can be effectively avoided, and maintenance is more convenient and fast. The controller is electrically connected with the electric control stop valve and is used for controlling the electric control stop valve so that opening and closing of the electric control stop valve are intelligently controlled through the controller, and fool-proof and mistake-proof problems in a use process of a user are solved.

The invention relates to an oil cylinder core tube cavitation corrosion prevention system for a crane and the crane with the oil cylinder core tube cavitation corrosion prevention system. The oil cylinder core tube cavitation corrosion prevention system for the crane comprises a telescopic changeover valve, a cavitation corrosion prevention overflow valve, a first directional control valve, a second directional control valve, a primary oil cylinder and a secondary oil cylinder, wherein the cavitation corrosion prevention overflow valve comprises a first oil port and a second oil port, the first directional control valve comprises a first control oil port, a second control oil port, four working oil port and two working positions, the second directional control valve comprises four working oil ports and two working positions, the primary oil cylinder comprises a core tube cavity, a rod cavity and a rodless cavity, and the secondary oil cylinder comprises a rod cavity and a rodless cavity. According to the oil cylinder core tube cavitation corrosion prevention system for the crane, due to the facts that a core tube oil supplementation channel is added, and the flow of supplemented oil is reasonably matched, the core tube cavity can be kept to be in the constant pressure state all the time, and the problem that cavitation corrosion of the core tube cavity happens due to the fact that negative pressure exists in a core tube is effectively solved; in addition, the phenomenon that extension of a third arm, a fourth arm and a fifth arm delays can be avoided, and a shaking fault of a pipeline can be prevented from happening.

The invention relates to a liquid storage device for preventing pump cavitation of an ORC power generation system and a work method of the liquid storage device. The liquid storage device comprises a condenser. The condenser is divided into a working medium side runner and a cooling water runner. In the working medium flowing direction, the working medium side runner is connected with a system working medium side inlet and a working medium liquid storage tank through pipelines. The working medium liquid storage tank is sequentially connected with a working medium pump and a system working medium side outlet through pipelines. A working medium tank cooling pipeline is arranged in the working medium liquid storage tank. In the cooling water flowing direction, the inlet end of the working medium tank cooling pipeline is sequentially connected with a cooling water circulation pump and a system cooling water side inlet through pipelines, the outlet end of the working medium tank cooling pipeline is connected with the cooling water runner through a pipeline, and the cooling water runner is further connected with a system cooling water side outlet through a pipeline. According to the liquid storage device for preventing pump cavitation of the ORC power generation system and the work method of the liquid storage device, the heat exchange effect is changed by adjusting the flow of cooling water, the organic working medium temperature is controlled, NPSHa control is achieved, the organic working medium temperature is reduced through cooling water, increasing of NPSHa is guaranteed, and the problem of pump cavitation is solved.