160 results about "Cryopump" patented technology

A cold storage material according to an embodiment contains a rare earth aluminum oxide containing at least one rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, in which a Group 1 element is contained in an amount of 0.001 atom % or more and 10 atom % or less, and a maximum volumetric specific heat value in a temperature range of 2 K or more and 10 K or less is 0.5 J / (cm3·K) or more.

The invention discloses a multi-stage isolation high vacuum obtaining system of a neutral beam injection device and a control method, and relates to the field of nuclear fusion Tokamak vacuum pumping design. The low-temperature pump unit comprises a plug-in low-temperature pump in a neutral beam vacuum chamber, and the plug-in low-temperature pump is used for refrigerating and cooling liquid nitrogen and liquid helium to adsorb gas to realize vacuum pumping; the low-temperature pump preceding-stage air extractor unit comprises a molecular pump unit, a roots pump unit and a mechanical pump unit; an inlet of the molecular pump set is connected with the neutral beam vacuum chamber through a gate valve, and an outlet of the molecular pump set is connected with an inlet of the roots pump set through a forestage valve. An inlet of the roots pump set is connected with the neutral beam vacuum chamber through a preceding stage valve and a pre-pumping valve, and an outlet of the roots pump set is connected with the mechanical pump set through the preceding stage valve. By adopting a multi-stage vacuum shielding technology and a step-by-step start-stop strategy, step-by-step transition from low vacuum to high vacuum and from high vacuum to low vacuum can be efficiently, stably and reliably realized, and an air extractor unit and a vacuum environment are protected from being polluted.

The invention discloses a testing method and device of a low-temperature pump, electronic equipment and a storage medium, and relates to the technical field of vacuum technology and vacuum pump performance tests.The testing method of the low-temperature pump comprises the steps that the first pressure of a first inflation chamber is obtained, and an air distribution mode is determined based on the first pressure; after gas distribution is completed based on the gas distribution mode, an impact test is started to introduce gas into the cryogenic pump; and acquiring temperature test data of the cryogenic pump, and determining the validity of the current test based on the temperature test data. According to the testing method of the low-temperature pump, the gas distribution process is more accurate through multiple gas distribution modes, the validity of the test data is judged through the temperature test data of the impact test, and the transition capacity parameter of the low-temperature pump is subjected to process inspection depending on experience; the method is converted into a standardized metering process which is high in reliability, high in efficiency and reproducible.

This invention discloses a testing method, apparatus, electronic device, and storage medium for cryogenic pumps, relating to the technical fields of vacuum technology and vacuum pump performance testing. The testing method includes: acquiring a first pressure in a first filling chamber and determining a gas distribution mode based on the first pressure; after completing gas distribution based on the gas distribution mode, initiating an impact test to introduce gas into the cryogenic pump; acquiring temperature test data of the cryogenic pump and determining the validity of the current test based on the temperature test data. This invention's cryogenic pump testing method makes the gas distribution process more precise through multiple gas distribution modes, and determines the validity of the test data through the temperature test data from the impact test. This transforms the cryogenic pump's pass-through capacity parameter from an experience-dependent process check into a highly reliable, efficient, and reproducible standardized measurement process.

Aspects of the present disclosure describe systems, methods, and structures that implement compact UHV ion trap systems that can operate at temperatures higher than cryogenic temperatures. Ion trap systems according to the present disclosure are surface treated and sealed while held in a UHV environment, with different components joined via UHV seals, such as welded joints, compressible metal flanges, and UHV compatible welded joints. As a result, no cryogenic pumps are needed, thereby enabling a very small volume system.

A hydrogen fueling station includes a hydrogen supply header, a hydrogen pump cylinder, and a hydrogen piston, the hydrogen piston including a piston seal. The hydrogen pump cylinder is configured to receive hydrogen from the hydrogen supply header. The hydrogen piston, the piston seal, and the hydrogen pump cylinder define at least in part a variable working chamber. The hydrogen piston is configured to provide a stroke length of greater than 310 mm.

The present application belongs to the technical field of coal seam permeability improvement in underground coal mine drilling, and provides a coal seam permeability improvement device and method for low-permeability coal seam in underground coal mine by temperature-variable jet flow, which comprises a jet flow nozzle installed at the outlet of a high-pressure water pipe, the inlet of the high-pressure water pipe being connected with a high-pressure water pump, and the high-pressure water pump being connected with a rapid heater; the jet flow nozzle is further connected with a liquid nitrogen generator through a vacuum heat insulation pipe, the inlet end of the liquid nitrogen generator being connected with a nitrogen generator, the outlet end being connected with the inlet end of a liquid nitrogen storage tank, the outlet of the liquid nitrogen storage tank being connected with a liquid nitrogen tank group, the outlet end of the liquid nitrogen tank group being connected with a cryogenic pump, and the outlet of the cryogenic pump being connected with the jet flow nozzle through a vacuum heat insulation pipe; the device effectively increases the fissure size of the drilling, improves the coal seam permeability, and increases the gas production. Meanwhile, a liquid nitrogen production device is used to directly produce liquid nitrogen, which is low in cost and can be reused. The method is simple and easy to operate, can effectively solve the loss of liquid nitrogen in the transportation process, improve the effect of liquid nitrogen on the coal body, and improve the coal seam permeability improvement effect.

The application belongs to the technical field of cryogenic pumps, and particularly relates to a cryogenic pump regeneration heating system and a regeneration heating method. t The state of the cold plate is evaluated according to the condensation layer area and the condensation layer temperature of the cold plate to be treated of the cryogenic pump, and when the cold plate to be treated is in an abnormal state, a cold plate temperature adjustment value C The state of the cold plate is evaluated according to the condensation layer area and the condensation layer temperature of the cold plate to be treated of the cryogenic pump, and when the cold plate to be treated is in an abnormal state, a cold plate temperature adjustment value C The state of the cold plate is evaluated according to the condensation layer area and the condensation layer temperature of the cold plate to be treated of the cryogenic pump, and when the cold plate to be treated is in an abnormal state, a cold plate temperature adjustment value C

A hydrogen fueling station includes a cryogenic pump hydraulic system with two hydraulic cylinders including hydraulic pistons with piston seals separating low pressure portions of the hydraulic cylinders above the piston seals from high pressure portions of the hydraulic cylinders beneath the piston seals. At least one first hydraulic volume source is configured to selectively communicate fluid between the first high pressure portion and the second high pressure portion. A first controllable valve is configured to selectively place the first and second low pressure portion in fluid communication with at least one low-pressure line. A second controllable valve is configured to selectively place at least one second hydraulic volume source in fluid communication with the first high pressure portion. A third controllable valve is configured to selectively place the at least one second hydraulic volume source in fluid communication with the second high pressure portion.

The nitrogen purging device for the low-temperature pump comprises a supporting table, the supporting table is used for containing the low-temperature pump, a nitrogen supply device is arranged on the supporting table, the nitrogen supply device is connected with a gas pipe, the gas pipe is connected with a nitrogen purging ring, and the nitrogen purging ring is movably arranged at the mechanical seal part of the driving end of the low-temperature pump in a sleeving mode. The nitrogen purging ring is used for blowing nitrogen to the driving end mechanical seal part of the low-temperature pump, the supporting table is further provided with a swing mechanism, the swing mechanism is used for driving the nitrogen purging ring to rotate back and forth at the corresponding amplitude, and the low-temperature pump has the advantages that the purging sufficiency of the whole mechanical seal part of the low-temperature pump can be improved, and the freezing risk of the mechanical seal part of the low-temperature pump is reduced.

A piston pump suitable for pumping a fluid at very low temperature, for example hydrogen, is disclosed. The pump has a suction side and a compression side, the suction side comprising an inlet provided for the liquid and intended to connected a liquid supply reservoir external to the pump, a suction chamber for receiving the fluid and a first fluid degassing duct communicating with the suction chamber, the compression side comprising a pump cylinder carrying an assembly for compression and delivery of the liquid, said cylinder comprising a second chamber which communicates with the suction chamber and wherein the fluid at very low temperature circulates in order to cool the compression and delivery assembly.

The invention relates to a piston pump (1) for liquefied gases, such as hydrogen, comprising a degassing gas separation device (4) arranged between the suction chamber (2) and the degassing chamber (3), the separation device (4) comprising a main body (40) comprising at least one through-passage (41) connecting the suction chamber (2) and the degassing chamber (3), and a closing means (42) for closing the passage, the closing means (42) being configured to: - in a closed position (P0), close the passage when the degassing pressure is higher than the suction pressure; - in an open position (P1), open the through-passage (41) when the degassing pressure is lower than or equal to the suction pressure.

The utility model discloses a universal adjustable safe vaporization device for liquefied bulk gas, which belongs to the technical field of vaporization devices and comprises a liquid nitrogen storage tank, one end of the liquid nitrogen storage tank is fixedly connected with a first gas source switch device, and the other end of the liquid nitrogen storage tank is fixedly connected with a second gas source switch device. The end, away from the liquid nitrogen storage tank, of the first gas source switch device is fixedly connected with a second gas source switch device and a vaporizer pipeline, and the face, away from the first gas source switch device, of the vaporizer pipeline is fixedly connected with a detection pipeline used for main pipeline detection. The face, away from the first gas source switch device, of the second gas source switch device is fixedly connected with two sets of temperature safety control devices. The problems that in the process that liquefied gas is conveyed to the vaporizer through a low-temperature pump and the like, the speed and the temperature need to be strictly controlled to prevent overload of the vaporizer, and meanwhile the pressure and the temperature of output gas behind the vaporizer can cause a large amount of influences on used equipment are solved.

A hydrogen fueling station includes a cryogenic pump with a hydrogen piston at least partially positioned within a hydrogen pump cylinder. A variable volume working chamber is defined at least in part by the hydrogen piston, a seal extending around the piston, and an end portion of the hydrogen pump cylinder opposite the first end portion of the first hydrogen pump cylinder. The hydrogen pump cylinder is coupled with a coupler to a thermal decoupling cylinder. The seal provides hydrogen leakage at a first pressure in the variable volume working chamber to an area beneath the seal. A blow by seal mounted to the first coupler provides hydrogen leakage to the thermal decoupling cylinder. A relief valve provides hydrogen leakage out of the thermal decoupling cylinder. The first hydrogen pressure is greater than the second hydrogen pressure, and the second hydrogen pressure is greater than the third hydrogen pressure.

The utility model discloses a pressurized gasification verification pry, and relates to the technical field of hydrogen-oxygen pressurization. The liquid material storage bottle, the low-temperature pump, the air temperature type vaporizer, the water bath type vaporizer and the gaseous material storage tank are mounted on the base and are sequentially communicated through a conveying pipeline; the flame arrester is assembled at the tail end of the blow-down pipe, and the front end of the blow-down pipe is connected to a gas return port of the low-temperature pump, a conveying pipeline at the front end of the blow-down pipe, a conveying pipeline at the rear end of the water bath type vaporizer and a gaseous material storage tank; and the detection mechanism is used for detecting the pressure before and after pressurization of the low-temperature pump, the temperature before and after heating of the air temperature type vaporizer and the water bath type vaporizer and the pressure and temperature of the gaseous material storage tank. A detection mechanism is arranged to detect the pressure before and after pressurization of a low-temperature pump, the temperature before and after heating of a gasifier and the temperature and pressure in a gaseous material storage tank in the hydrogen-oxygen supply system so as to verify the principle of the high-pressure hydrogen / oxygen supply system.

The utility model discloses a regenerator, cryopump and refrigerator, including admission plug, regenerator casing, exhaust plug, said regenerator casing one end is fixedly connected with admission plug, the other end is detachably fixed with exhaust plug, admission plug, regenerator casing, exhaust plug fixed enclosure form the cavity, be equipped with internal packing. According to the utility model, through a detachable connection mode, the quantity, the weight, the type and the like of the filler in the regenerator can be simply adjusted, the regenerator does not need to be reprocessed, and the adjustment of the cooling capacity can be realized.

The application discloses a low-temperature pump with adjustable gas pumping speed, which comprises a pump body assembly, a control assembly and a field generator. The pump body assembly is provided with a pump cavity with a pumping opening. The control assembly is arranged in the pump cavity and comprises a field induction part and a throttling part connected to the field induction part, and the field induction part is connected to the pump body assembly. The field generator is arranged in the pump body assembly and used for emitting a control field to the field induction part. The control field can make the field induction part change shape, and the change of the shape of the field induction part can make the throttling part change position relative to the pump body assembly, so that the fluid flow rate flowing into the pump cavity can be changed. The low-temperature pump can change the fluid flow rate of the pump cavity through the field generator and the field induction part, and has a simple structure.

A system and method for high rate liquid hydrogen tank filling with minimal vapor losses is provided. The flexible, pump-based filling system can achieve high fill rate of liquid hydrogen in excess of 100 kg per minute and accommodate maximum delivery pressures. The present system and method further includes recovery and re- liquefaction of displaced and flash generated tank vapors. The liquid cryogen filling system comprises a holding tank 20 configured to store liquid cryogen; two or more cryogenic pumps 22, 24 disposed in series arrangement downstream of the holding tank, the two or more cryogenic pumps configured to pressurize a stream of liquid cryogen from the holding tank to form a pressurized liquid cryogen stream; a heat exchanger 25 configured to warm the stream of liquid cryogen via indirect heat exchange against a recycled gaseous cryogen stream to yield a liquid cryogen recycle stream; a target tank 30 disposed downstream of the heat exchanger and configured to receive the warmed, pressurized liquid cryogen stream; a recycle circuit 35 comprising a first conduit 36 configured to direct a saturated vapor cryogen stream from a headspace or overhead of the target tank to the heat exchanger as the recycled gaseous cryogen stream and a second conduit 38 configured to receive the liquid cryogen recycle stream from the heat exchanger; one or more valves 40 disposed in the recycle circuit downstream of the heat exchanger; and a recovery tank 45 disposed downstream of the one or more valves and configured to receive the liquid cryogen recycle stream; wherein a liquid cryogen stream from the recovery tank is recycled.

To provide a cold storage material having excellent specific heat characteristics.SOLUTION: A cold storage material of an embodiment includes: a SmNiGe3-type crystal phase; and holmium (Ho), erbium (Er), nickel (Ni), and silicon (Si) and / or germanium (Ge).SELECTED DRAWING: Figure 1

A cryopump assembly, including a centrifugal pump and an induction motor, specially configured for delivery of liquid hydrogen (LH2) from a cryogenic LH2 tank to various application scenarios, has a horizontal configuration and includes an offset discharge port to prevent the occurrence of gas blockage phenomena. A one-piece vacuum jacket housing may be employed to enclose various portions of the centrifugal pump and the induction motor to prevent heat loss, while another embodiment is to lubricate the bearings and cool the induction motor with LH2 flow through the induction motor. The centrifugal pump can be of a single-stage type or a multi-stage type, and each stage unit comprises an impeller and a guide vane connected with a guide vane shell. The pump shares one motor / pump shaft with the motor. Another embodiment is that the cryopump assembly is vertically submerged in a cryogenic LH2 tank, or vertically submerged in a sump vessel secured to the exterior or interior of the cryogenic LH2 tank.

This invention discloses a cryogenic pump for a fusion device and a fusion device. The cryogenic pump, relating to the field of fusion devices, includes: a cryogenic pump body defining an adsorption space, and a first medium inlet communicating with the adsorption space; a valve assembly disposed on the cryogenic pump body for opening or closing the first medium inlet; and at least one adsorption component, at least a portion of which is disposed within the adsorption space for adsorbing gas within the adsorption space, and which is detachably disposed on the cryogenic pump body. Therefore, by detachably disposing of the adsorption component on the cryogenic pump body, the adsorption component can be replaced individually, which helps reduce the maintenance cost of the cryogenic pump, thereby reducing the production cost of fusion energy and improving economic efficiency. Furthermore, when replacing a single adsorption component, the entire adsorption process can be continuously replaced.

Adapt the cryopump to the radiation environment. [Solution] The cryopump 10 comprises a cold head motor 16a, an inverter 32b located remotely from the cold head motor 16a and configured to output a PWM voltage capable of driving the cold head motor 16a at a determined operating frequency, and at least one converter 34 connected between the inverter 32b and the cold head motor 16a. The converter 34 is configured to receive a PWM voltage from the inverter 32b, convert the PWM voltage into a cold head motor drive voltage that drives the cold head motor 16a at a determined operating frequency, and output the cold head motor drive voltage to the cold head motor 16a. The cold head motor drive voltage has a waveform with reduced high-frequency components compared to the PWM voltage.

The application discloses a low-temperature liquid rocket engine immersion precooling system and method, and belongs to the technical field of liquid rocket engine precooling, which comprises a low-temperature propellant tank, a conveying pipeline, a low-temperature pump, a post-pump pipeline and low-temperature valves; the application only utilizes necessary heat exchange components of the engine to realize immersion precooling, and does not need to set a discharge valve, a discharge pipeline, a reflux pipeline and a reflux valve, so that the system structure is greatly simplified; the precooling process does not need propellant discharge, effectively reduces the propellant consumption, and improves the rocket carrying capacity; in combination with an overall layout of an inclined downward direction, a guide inner wall and an inclined upward design of the post-pump pipeline, a continuous exhaust passage is constructed, gas is ensured to smoothly float up, and the precooling efficiency is greatly improved; by limiting the relative relationship between the inclination degrees of the guide inner wall and the post-pump pipeline, the gas floating rate can be flexibly optimized according to different working conditions, the best balance between the exhaust efficiency and the flow stability is realized, and the system working condition adaptability and the precooling effect controllability are remarkably improved.

To provide a method for producing granulated particles for cold storage material particles, enabling a reduction in the production cost of the cold storage material particles.SOLUTION: A method for producing granulated particles for cold storage material particles according to an embodiment includes: mixing a raw material powder comprising a rare-earth oxysulfide containing at least one rare-earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu or a raw material powder comprising a rare-earth oxide containing at least one rare-earth element with a binder containing 0.01 wt.% or more to 40 wt.% or less of an organic substance to prepare a raw material mixture; and then granulating the raw material mixture by tumbling granulation, stirring granulation, extrusion, spraying, or press molding, wherein the granulated particles for cold storage material particles have a carbon level of 0.001 wt.% or more and 50 wt.% or less and a relative density of 10% or more and 50% or less.SELECTED DRAWING: Figure 1

The application relates to the field of nuclear fusion, and discloses a cryogenic distribution system of a fusion reactor cryogenic pump and a nuclear fusion device. The cryogenic distribution system of the fusion reactor cryogenic pump comprises a valve box, a cold shield, a cryogenic pump, a 4.5K helium supply pipeline, a 4.5K helium recovery pipeline, an 80K helium supply pipeline, an 80K helium recovery pipeline, a vacuum pump set, a vacuum pump and a vacuum gauge, and the cold shield is arranged on the valve box. The cryogenic pump has an adsorption plate cooling flow channel and a hot shield plate cooling flow channel. The 4.5K helium supply pipeline is connected with the inlet of the adsorption plate cooling flow channel. The 4.5K helium recovery pipeline is connected with the outlet of the adsorption plate cooling flow channel. The 80K helium supply pipeline is connected with the inlet of the hot shield plate cooling flow channel. The 80K helium recovery pipeline is connected with the outlet of the hot shield plate cooling flow channel. The vacuum pump set is arranged outside the valve box and is connected with the valve box. The application can effectively meet the medium demand of the full working condition operation of the cryogenic pump by arranging the helium source supply and recovery paths of multiple temperature levels, and ensures the reliability of the operation of the cryogenic pump.

The invention relates to a cryogenic fluid storage and distribution installation, for example of liquid hydrogen, comprising a cryogenic tank (11) buried underground, a liquid withdrawal circuit (20) connected to the tank (11) with a downstream end located above ground and intended to be connected to a user, the withdrawal circuit (20) comprising, disposed above ground, a cryogenic pump (2), the installation (1) comprising a vaporization gas recovery line (3) generated within the pump (2) having a downstream end connected to the tank (11), the vaporization gas recovery line (3) comprising at least one device (8, 9) for regulating the pressure and / or flow of the vaporization gas returned to the tank (11), the pressure and / or flow regulation device (8, 9) being configured to regulate the pressure within the tank (11) to a pressure level higher than the pressure at the inlet of the pump (2).Abbreviated figure: Fig. 1.

Provided is a cold storage material having high volumetric specific heat and high thermal conductivity. A cold storage material according to an embodiment of the present invention contains a rare earth aluminum oxide containing at least one rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, the cold storage material containing 0.001-10 at% of a group 1 element, and the balance of a rare earth aluminum oxide containing at least one rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. The maximum value of volumetric specific heat of the cold storage material in a temperature range of 2 K to 10 K is 0.5 J / (cm < 3 > K) or more.

Cold storage material particles according to one embodiment of the present invention contain: at least one first element that is selected from the group consisting of rare earth elements, silver (Ag) and copper (Cu); and a second element that is different from the first element and forms a polyvalent metal ion in an aqueous solution. With respect to the cold storage material particles, the atomic concentration of the second element is from 0.001% by atom to 60% by atom; and the maximum value of the volumetric specific heat at a temperature of 20 K or less is 0.3 J / cm3·K or more.

Equipment and methods for pumps used to cool liquid hydrogen or other cryogenic fluids can be configured to allow for rapid start-up, which also helps to minimize hydrogen loss. Some embodiments may utilize a leakage circuit configured and arranged to support cryogenic cooling operation of the pump, which can minimize hydrogen loss while allowing for significantly improved pump start-up time. Some embodiments may utilize at least one temperature sensor to monitor temperature, and an adjustable control valve that can facilitate the flow of fluid used to cool the pump.