67 results about "Turboexpander" patented technology

A cold energy recovery facility includes a liquid hydrogen tank configured to store liquid hydrogen a first circuit configured to circulate a first working medium, a second circuit configured to circulate a second working medium having a freezing point higher than the first working medium, a first turboexpander provided in the first circuit, the first turboexpander being configured to be driven by the first working medium in a gas state, a second turboexpander provided in the second circuit, the second turboexpander being configured to be driven by the second working medium in a gas state, a first heat exchanger configured to vaporize the liquid hydrogen from the liquid hydrogen tank by heat exchange with the first working medium, a second heat exchanger configured to vaporize the first working medium in a liquid state by heat exchange with the second working medium, and a third heat exchanger configured to vaporize the second working medium in a liquid state by heat exchange with a heat medium, wherein the first circuit and the first turboexpander form a part of a first thermodynamic cycle that uses the liquid hydrogen as a low-temperature heat source in the first heat exchanger, and the second circuit and the second turboexpander form a part of a second thermodynamic cycle that uses the first working medium as a low-temperature heat source in the second heat exchanger.

The invention relates to the technical field of impeller machinery, in particular to a turbo expander noise reduction supporting plate structure which comprises a supporting plate body, a tooth-shaped tail edge and sound absorption holes, the tooth-shaped tail edge is arranged on one side of the supporting plate body, the two ends of the supporting plate body are connected with the inner wall of an exhaust pipe and a flow guide cone respectively, and the supporting plate body is arranged close to an air inlet. The tooth-shaped tail edge is arranged close to the exhaust port; sound absorption holes are formed in the side face of the supporting plate body. Noise generated by an upstream turbine blade grid is absorbed through the sound absorption holes, an efficient through-flow structure is formed through the tooth-shaped tail edge, poor flow structures such as flow separation, falling vortex and wake loss are changed, and the aerodynamic noise of the turbine blade grid is restrained.

An aircraft propulsion system includes a cryogenic fuel system and a fuel flow path where a fuel flow is circulated from upstream in a direction downstream to a combustor of the core engine. A first heat exchanger inputs heat into the fuel flow downstream of the first heat exchanger is used to heat the fuel flow from the fuel storage tank and a second heat exchanger inputs thermal energy from a heat source into the fuel flow from the core engine downstream of the first heat exchanger. A turboexpander is configured to generate shaft power from expansion of the fuel flow exhausted downstream from at least one of the first heat exchanger and the second heat exchanger.

The invention relates to the technical field of low-temperature turbo-expanders, in particular to a low-temperature turbo-expander main machine and a complete machine system, and the low-temperature turbo-expander main machine is designed around a main shaft. The main shaft sequentially penetrates through and integrates the impeller assembly, the braking assembly, the lubricating assembly and the sealing assembly which are located at the two ends, and the braking assembly is matched with an external braking sleeve through bidirectional braking oil grooves formed in a braking section of the main shaft and opposite in rotating direction to form a hydraulic braking system. The lubricating assembly comprises a thrust bearing structure comprising a plurality of tilting pads and thrust tiles, and an oil retainer is integrated to form a closed lubricating cavity. According to the sealing assembly, a multi-stage sealing structure at least comprising two sealing sections is adopted at the two ends of the main shaft, and sealing gas is introduced into a sealing groove to effectively block leakage of an internal working medium. A nozzle part in the impeller assembly synchronously drives a plurality of rotatable blades through a linkage ring, and the end gaps of the blades are dynamically controlled through a pressing ring mechanism capable of axially moving.

The application discloses an axial force balancing mechanism and a turbo expander. The axial force balancing mechanism is used for balancing the axial force of a turbo expander. The axial force balancing mechanism comprises a casing, a main shaft rotatably connected with the casing, the main shaft having an expansion end and a pressurization end, the expansion end being provided with a working wheel, and the pressurization end being provided with a pressurization wheel; a shaft sleeve fixed to the main shaft, the inner shaft sleeve being provided with a shaft sleeve sawtooth; and a sealing device connected with the casing and corresponding to the inner shaft sleeve, the sealing device being provided with a sealing sawtooth; wherein the tooth shapes of the shaft sleeve sawtooth and the sealing sawtooth are staggered. The axial force balancing mechanism and the turbo expander can realize the balance adjustment of the axial force of the expander.

The application discloses a fuel cell air supply system based on a compression-expansion integrated machine and a control method. The system comprises a compressor, an air inlet of the compressor being used for connecting air; an air cooler, an air inlet of the air cooler being connected with an air outlet of the compressor, and an air outlet of the air cooler being connected with an air inlet of a fuel cell stack; and a turbo-expander, an air inlet of the turbo-expander being connected with an air outlet of the fuel cell stack. The compressor and the turbo-expander are coaxially and oppositely arranged, and are connected through a motor. A discharge valve is arranged on a connecting pipeline between the air outlet of the fuel cell stack and the air inlet of the turbo-expander, and the discharge valve can discharge exhaust gas discharged through the air outlet of the fuel cell stack. The application can guarantee the stability of the air supply system under low working conditions, and improve the variable working condition adaptability of the fuel cell air supply system based on the compression-expansion integrated machine.

The application discloses a gas-suspension low-temperature turbine expander, which comprises a main shaft, an expansion end diffuser, an expansion end impeller, a nozzle, an expansion end volute, an expansion end cover plate, a shell, an axial displacement fixing device I, a thrust disc I, an exhaust pipeline, a thrust disc II, an axial displacement fixing device II, a braking end cover plate, a connecting pipeline, a spiral refrigeration pipeline inlet, a spiral refrigeration channel, a spiral refrigeration pipeline outlet, a braking end volute, an electric adjusting device, a sealing device, a braking end inlet flow guide section, an adjustable filter screen, a fixed filter screen, a braking end impeller, a braking end diffuser, a heat dissipation fin, a labyrinth sealing exhaust passage, an electric eddy current sensor, an air inlet pipeline, a labyrinth seal, a water pump, a water inlet pipeline and a waterway connecting pipeline. Cold energy is generated at the expansion end, and the braking end closed loop adjusts the load to ensure safe operation. The gas-suspension bearing is full-movement, and effectively supports the stable operation of the rotor at an ultrahigh rotating speed. The device can be used as a core cold production device in the liquefaction, separation and refrigeration process of helium, hydrogen, nitrogen and air. The device has compact overall structure, high environmental adaptability and high reliability, and realizes the design goals of oil-free operation and economic efficiency.

A hydraulic or pneumatic actuator for a valve, in particular a trip valve which may be used to cut-off the fluid supplied to an expander when a fault occurs, e.g. when pressure drops under a predetermined pressure value. The innovative actuator has a movable plate having a first side associated to a spindle of the valve through a rod and a second side associated to a spring which is configured to move the movable plate. The actuator is provided with a testing system configured to measure the elastic force of the spring without closing partially or totally the valve, in order to check the correct condition of the spring.

The application relates to the technical field of low-temperature refrigeration, in particular to a low-temperature turboexpander. The low-temperature turboexpander comprises an integrated expansion volute, a fan volute connected with the expansion volute and a main machine arranged in the expansion volute, an end plate of the expansion volute and the fan volute is fixed to an external cold box, so that the expansion volute and the main machine are completely located in the cold box, the main machine comprises a main unit and a secondary unit which are integrally assembled and detachably connected with each other, the main unit is related to the shaft power grade of the turboexpander, and the secondary unit is related to the design requirement of the turboexpander. The technical scheme can effectively guarantee the assembly precision, reduce the heat leakage to the outside and improve the production efficiency.

A method for separating a mixed feed stream may include: compressing and cooling the mixed feed stream; separating the mixed feed stream into a first vapor stream and a first liquid stream; cooling the first vapor stream to form a cooled stream; separating the cooled stream into a second vapor stream and a second liquid stream; passing the second vapor stream through one or more heat exchangers to produce a warmed second vapor stream; reducing the pressure of the warm second vapor stream in the turboexpander, wherein work is extracted from the warm second vapor stream to form a second coolant stream; and using work from the turbo expander to drive a generator, a turbo compressor, or both.

The invention relates to the technical field of rotating speed sensors, in particular to a rotating speed sensor for a hydrogen turbo expander. The rotating speed sensor comprises a shell fixed on a shell of the hydrogen turbo expander, a through hole is formed in the end, extending into the shell, of the shell, and a reflective mark is arranged on a rotating shaft of the hydrogen turbo expander; the connecting assembly is fixed to the inner wall face of the shell, a light-transmitting piece is arranged at the position, close to the through hole, of the connecting assembly, and a sealing structure is arranged between the connecting assembly and the shell; and the sensor unit adopts a photoelectric rotating speed sensor, the sensor unit is detachably arranged in the connecting assembly, a probe of the sensor unit faces the light transmitting piece, and the probe is used for capturing the position of the reflective mark so as to measure the rotating speed of the rotating shaft. According to the technical scheme, the rotating speed of the hydrogen turbo expander can be safely and effectively measured.

The invention provides a nozzle structure, a control method, a control system and a turbo expander, the nozzle structure comprises an annular nozzle body and a plurality of blades arranged in the circumferential direction of the nozzle body, and a flow channel is formed between every two adjacent blades; the blade comprises a driving layer driven based on shape memory alloy, and the driving layer is connected with an external driving circuit. The external driving circuit sends a target driving electrical parameter control signal to the driving layer based on the target width of the throat part of the flow channel, the driving layer drives the blades to generate directional deformation under the driving of the target driving electrical parameter, and the throat part width of the flow channel is converted into the target width; wherein the target width is determined based on the flow parameter of the fluid flowing through the flow channel. Under the driving action of an external driving circuit, the blades can generate continuous flexible deformation, so that the width of the throat part of the flow channel reaches the target width, the dynamic adjustment of the throat part width is realized, the adjustment does not cause leakage, and the strict requirement of the high-parameter turbo expander on the variable working condition efficiency is met.

The invention discloses a movable integrated cooling device for an underground roadway. The movable integrated cooling device comprises an integrated control box, and a turbocharger, a water-cooling heat exchanger and a turbo expander are arranged in the integrated control box; a water cooling filter and an air filter are arranged outside the integrated control box body; the water-cooling filter is connected with the water-cooling heat exchanger through a water-cooling pipeline; the air filter is connected with an air inlet of the turbocharger through a normal-temperature air inlet pipeline; an exhaust pipe of the turbocharger is connected with an air inlet of the turbo expander through a heat exchange pipe of the water-cooling heat exchanger; a low-temperature air controller is arranged at an air outlet of the turbo expander; the turbocharger and the turbo expander share a coaxial magnetic suspension motor with double-side output; the main function is to replace a traditional air-conditioning system to solve the problem of heat damage to underground roadways. The device has the advantages of being small in size, convenient to move, free of a long-distance pipeline, free of a fan for conveying cooling capacity, and suitable for use and cooling.

1. The name of the design product: turbine expander brake circulator. 2. The use of the design product: turbine expander brake circulator is suitable for turbine expander brake side, which supports and guides gas for turbine expander brake side. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

A hydraulic or pneumatic actuator (100, 200) for a valve, in particular a trip valve which may be used to cut-off the fluid supplied to an expander when a fault occurs, e.g. when pressure drops under a predetermined pressure value. The innovative actuator has a movable plate (30) having a first side (31) associated to a spindle of the valve through a rod (21) and a second side (32) associated to a spring (40) which is configured to move the movable plate. The actuator is provided with a testing system (50) configured to measure the elastic force of the spring without closing partially or totally the valve, in order to check the correct condition of the spring.

The invention discloses an emergency air conditioning system and method for a power station electronic equipment room based on compressed air. The system comprises a cold storage and supply module, a vortex tube cold supply module and a turbo expander cold supply module. According to the system, compressed air in an air storage device of a power station is used as emergency energy, a multi-redundancy cold supply path is formed through four modes of cold energy pre-storage of a cold storage tank, vortex tube cooling, heating and power co-production, turbo expander cooling and power co-production and semiconductor refrigeration local temperature control, and global and local combined precise temperature control is achieved; in addition, a solution dehumidification unit and a membrane separation deoxidization unit are integrated, and the environment requirements of constant temperature, constant humidity, constant oxygen and micro-positive pressure are synchronously guaranteed by utilizing waste heat. The system realizes self-sufficiency and cascade efficient utilization of energy, has modular expansion and air pressure-based graded response capability, is beneficial to emergency environment guarantee between electronic equipment under the condition of power loss of the whole plant, and has the characteristics of high reliability, high energy efficiency, economical efficiency and the like.

The invention is entitled "Paraffin Dehydrogenation Process and Apparatus". A process for recovering hydrogen from a dehydrogenation reactor effluent is disclosed. A feed stream comprising hydrocarbons and hydrogen is passed to a dehydrogenation reactor maintained at dehydrogenation conditions to provide a dehydrogenation reactor effluent. The dehydrogenation reactor effluent is passed to a cold box separation unit to provide a liquid hydrocarbon product stream and a recycle hydrogen stream. A return portion of the recycle hydrogen stream is passed to a reactor effluent compressor. The subject discloses improved processes and apparatus that enable a paraffin dehydrogenation reactor to be operated at a reduced H2 / HC ratio without the need for an investment in a re-sized compressor or a re-sized turbo-expander or separator in the cold box.

The utility model discloses a natural gas turbine pressure reduction power generation system which solves the problem that energy is difficult to recycle efficiently in the natural gas pressure reduction process. A natural gas turbine pressure reduction power generation system comprises a turbo-expander, a gear box, an interstage heat exchanger, a regulating valve and a power generator, the turbo-expander comprises a high-pressure turbine part sleeve and a low-pressure turbine part sleeve, the gear box comprises a high-speed shaft and a low-speed shaft, the high-pressure turbine part sleeve and the low-pressure turbine part sleeve are connected to the two ends of the high-speed shaft of the gear box, and the interstage heat exchanger is connected with the regulating valve. The generator is connected to one end of a low-speed shaft of the gearbox, the adjusting valve is connected to the inlet end of the high-pressure turbine part sleeve, and the interstage heat exchanger is connected between an outlet of the high-pressure turbine part sleeve and an inlet of the low-pressure turbine part sleeve.

Turboexpander (100, 200, 300) for expanding high-pressure ratio gas, comprising: a plurality of hollow impellers (EXP (1); EXP (2);....EXP(J)) configured in multiple stages; and a tie rod to pass through each of the plurality of hollow impellers (EXP (1); EXP (2);.... EXP(J)), wherein the plurality of hollow impellers (EXP (1); EXP (2);.... EXP(J)) are stacked together and tightened through the tie rod disposed in a rotor (120, 220, 320); wherein the turboexpander (100, 200, 300) comprises a first radial bearing (130, 230, 330), and a second radial bearing (140, 240, 340).

A turboexpander with a turbine wheel coupled to drive a generator in response to a flow of incoming gas. A housing assembly of the turboexpander defines a sealed space, sealed from the incoming gas. The sealed space is in fluid communication with a surface of the turbine wheel such that pressure in the sealed space acts on the turbine wheel. A bypass passage communicates pressure between the sealed space and a space in communication with an outlet of the turbine wheel. The bypass passage includes an changeable flow area to control the communication of pressure between the sealed space and the outlet of the turbine wheel.

The invention relates to the technical field of turbo expanders, and discloses a turbo expander main shaft and impeller connecting structure and an assembling method thereof.The turbo expander main shaft and impeller connecting structure comprises an impeller and a main shaft, a shaft hole used for allowing the main shaft to be inserted is formed in the impeller, and the turbo expander main shaft and impeller connecting structure further comprises a positioning assembly used for positioning the impeller; a connecting groove is formed in the main shaft, and the positioning assembly comprises a positioning rod detachably connected into the connecting groove, a positioning seat slidably arranged on the outer wall of the positioning rod in a sleeving mode and a locking seat connected to the positioning rod in a threaded mode. A gap exists between the outer wall of the positioning rod and the inner wall of the connecting groove, the outer wall of the positioning rod is slidably sleeved with an abutting sleeve, and the abutting sleeve abuts against the inner wall of the connecting groove; when the impeller is heated to be detached from the main shaft, the positioning seat and the abutting sleeve are taken down, and then the locking seat abuts against the end of the main shaft. The impeller mounting structure has the effects of being high in impeller mounting precision and good in connection stability.

The invention discloses a low-temperature air high-speed centrifugal machine and a control method. The low-temperature air high-speed centrifugal machine comprises an air filter, a sensor I, a centrifugal compressor, a heat exchanger, a sensor II, a centrifugal cavity, a sample disc, a control panel, a temperature transmitter, a turbo expander, a water-cooling heat exchanger, an electric valve and a silencer. Wherein the air outlet end of the centrifugal compressor is divided into two branches through a flow dividing pipeline, the first branch is communicated with the atmospheric environment through an electric valve and a silencer, the second branch is in fluid communication with an air inlet of a heat exchanger, an air outlet of the heat exchanger is communicated with an air inlet of a turbo expander, the turbo expander is coaxially and fixedly connected with a sample disc, and the sample disc is in fluid communication with the air inlet of the turbo expander. The whole sample disc is located in the centrifugal cavity, airflow expanded and cooled by the turbo expander enters the centrifugal cavity, flows out from the other end after flowing through the internal space of the centrifugal cavity, enters the heat exchanger again for secondary heat exchange, and finally returns to an air inlet main path of the centrifugal compressor to form a closed airflow circulating system. The system collects multi-source signals such as temperature and rotating speed through a PID controller in a control panel, closed-loop dynamic regulation and control are implemented based on parameters preset by a user, and finally precise control over the centrifugal working condition is achieved. According to the centrifugal machine, the centrifugal machine can obtain a higher rotating speed and reach a lower temperature, the biological sample separation effect is improved, meanwhile, the biological sample is more effectively prevented from being denatured or inactivated due to temperature rise in the centrifugal process, and the sample inactivation rate is reduced to a large extent.

This invention discloses a turbine expander with a condensate droplet collection device that is synchronously adjustable with the nozzle. It includes a condensate droplet collection device located at the outer peripheral inlet of the turbine expander. Two condensate droplet collection mechanisms are respectively arranged on the end faces on both sides of the outer peripheral inlet of the turbine expander, and an adjustable nozzle and assembly are connected between the two condensate droplet collection mechanisms. Each condensate droplet collection mechanism includes a fixed disc assembly and a rotating disc assembly coaxially arranged on the end face, as well as an adjustable nozzle limiting assembly, an adjustable liquid collecting rib assembly, a synchronously rotating connecting rod assembly, a motor crank drive assembly, and a liquid collection and drainage assembly. This invention solves the problems of erosion damage caused by condensate droplets impacting the impeller in existing turbine expanders and the reduced expansion efficiency due to interference with the mainstream liquid collection structure in conventional turbine expanders. It efficiently captures condensate droplets generated by the adiabatic expansion of the working fluid between the nozzle and the impeller, reducing droplet entry into the impeller and reducing erosion damage caused by impeller impact.

The invention discloses a low-temperature compression test system and method. The test system comprises a centrifugal compressor skid-mounted device, a vacuum pump, a refrigeration cold box, a heat exchange cold box, a low-temperature compression chamber, a heat exchanger, a water cooling machine, a multi-type valve and a compression loop sensor. The centrifugal compressor skid-mounted device adopts a full-dynamic-pressure gas bearing centrifugal compressor; a low-temperature centrifugal compressor in the system adopts a direct-current or alternating-current controller; a low-temperature turbo expander in the system adopts pressurization braking or fan braking. The whole system is supported by a full-dynamic-pressure gas bearing, pure oil-free operation is achieved, and the size and the weight of the system are greatly reduced; the integration level of the system is improved by skid-mounted centrifugal compressors; the applicability of the system is improved by setting different braking modes; the temperature of inlet gas of the low-temperature centrifugal compressor can be further reduced through the arrangement of the multiple low-temperature turbine expanders; the setting of the vacuum mode and the heat preservation mode enables the low-temperature centrifugal compressor to operate within the inlet temperature range of-269 DEG C to 0 DEG C, and the power consumption of the system is greatly reduced.

The invention provides a control method of a fuel cell air supply system, electronic equipment and a storage medium, and belongs to the technical field of fuel cells. The fuel cell air supply system comprises an air compressor and a turbo expander, an outlet of the air compressor is in fluid communication with a cathode inlet of a fuel cell stack, and a cathode outlet of the fuel cell stack is in fluid communication with an inlet of the turbo expander. The control method comprises the following steps: acquiring a current running state value of a fuel cell stack, a current rotating speed of an air compressor and a current inlet opening degree of a turbo-expansion machine, and inputting the values into a reinforcement learning model to generate a rotating speed normalized value of the air compressor and an inlet opening degree normalized value of the turbo-expansion machine; and the current flow and the current pressure ratio of the air compressor are obtained, the surge line and the blocking line of the air compressor are combined, the rotating speed normalization value of the air compressor or the inlet opening normalization value of the turbo expander is determined, and the running state of the fuel cell air supply system is adjusted. The gas supply safety of the system can be improved, and the operation power consumption of the system is reduced.

An apparatus for using nitrogen within a closed loop cryogenic system is described. A cryochamber is provided that has a first nitrogen flow line with an inlet for connection to a nitrogen source and an outlet. At least one cryogenic cooling loop is provided that has a nitrogen inlet and a nitrogen outlet. The nitrogen inlet and outlet are in fluid communication with the first nitrogen flow line. The nitrogen inlet is positioned upstream of the nitrogen outlet. A heat exchanger is provided on the at least one cryogenic cooling loops through which the nitrogen passes. The heat exchanger has a fluid inlet and a fluid outlet. A turbo expander is in fluid communication with the outlet of the first nitrogen flow line and the nitrogen source. The turbo expander re-cools the nitrogen that passes through the first flow line and the at least one cryogenic cooling loop.

The utility model relates to mechanical equipment field and disclose a whole set of pry installation's turbine expander unit, including the chassis, be provided with expansion refrigeration system, braking system, lubricating oil system, cooling water system, instrument gas system and electrical control system on the chassis, and expansion refrigeration system and lubricating oil system are relatively arranged in the edge place of chassis close to two sides, and cooling water system is located one side of lubricating oil system, the expansion refrigeration system, braking system, lubricating oil system, cooling water system, instrument gas system and electrical control system of expansion unit supporting are all integrated in the space in the chassis range, realize the whole assembly of turbine expander unit in a pry installation block, complete detection, paint, pressure test, debugging, heat preservation, cold preservation and instrument electricity etc. all installation work in advance, just transport to the specified position, can immediately put into use, has saved user's a lot of time and manpower, has reduced the cost significantly, has improved the economy of equipment.