123 results about "Stirling cryocooler" patented technology

The invention discloses a low-vibration long-service-life rotary split type Stirling cryocooler, relates to the technical field of cryocoolers, and aims to solve the technical problems that reciprocating movement of a single compression piston has rotary inertia force, and a connecting rod in the single compression piston swings during movement, so that large vibration is generated. Comprising a compressor body and an expansion machine body which are arranged in a split mode. The motion states of the two compression pistons can be the same all the time through the symmetrical centering crank sliding block mechanisms which are completely equal in size and weight, then the momentum of the compressor is balanced, and finally reciprocating and rotating inertia force of the crank sliding block mechanisms is completely eliminated, and only extremely small vibration is generated. And a compressor is assisted to generate periodic pressure wave driving, and a gas spring is formed by using a dynamic seal, so that the discharger and the gas spring supported by the discharger form a forced vibration system, the formed damping force can generate a proper phase difference, and finally, an effective refrigeration effect is generated.

The invention provides an expansion machine air inlet structure for a Stirling cryocooler and the Stirling cryocooler. The air inlet structure comprises a pushing piston, and the pushing piston comprises a rod part and a plug part; a plug part of the pushing piston comprises a plurality of inclined round hole air passages, a plurality of first slit type air passages communicated with the inclined round hole air passages are arranged at one end, far away from a rod part, of the plug part, and the plurality of first slit type air passages are uniformly distributed around a central shaft of the pushing piston and are intersected at the central shaft of the pushing piston; the end face, away from the rod part, of the plug part is provided with a conical concave face at the intersection of the first slit type air channels. The pushing piston is connected with a hot end of a heat regenerator; the cold end of the heat regenerator is provided with a plurality of second slit type air channels, and the second slit type air channels are evenly distributed around the center axis of the heat regenerator and intersect at the center axis of the heat regenerator. The device is simple in structure and easy to machine; the laminar flow state of a working medium at the cold end and the hot end of the heat regenerator can be effectively enhanced, flow resistance and eddy current loss are reduced, and refrigerating efficiency is improved.

The utility model discloses a Stirling low-temperature liquefaction system which comprises a Stirling cryocooler unit, a liquid storage unit, a cooling water unit and a control unit. The Stirling cryocooler unit comprises a Stirling cryocooler and an internal combustion engine which are connected through a power transmission mechanism; the Stirling cryocooler comprises a condensation head used for liquefying gas, a cold end heat exchanger is arranged in the condensation head, and the cold end heat exchanger is a finned heat exchanger or a tubular heat exchanger. The cold end heat exchanger is directly connected with the liquid storage unit; a water cooler of the Stirling cryocooler is connected with an inlet and an outlet of the cooling water unit; the control unit is electrically connected with the internal combustion engine, the work transmission mechanism, the liquid storage unit and the cooling water unit. By means of the system, the liquefaction efficiency of the liquefaction system is improved, zero emission in the liquefaction process is achieved, meanwhile, the internal combustion engine drives the Stirling cryocooler to conduct gas liquefaction, the energy utilization efficiency is improved, and therefore the problem that a conventional liquefaction system depends on electric power is solved.

The utility model relates to the technical field of Stirling cryocoolers and discloses an integrated Stirling cryocooler which comprises a machine shell and a machine cover, the left side and the right side of the front end of the machine shell are each provided with a plurality of clamping grooves, the left side and the right side of the machine cover are each fixedly connected with a plurality of clamping blocks, and the left side and the right side of the rear end of each clamping block are each provided with a hole. A threaded rod is rotatably connected to the bottom end of the interior of the clamping block, a rotating block is fixedly connected to the front end of the threaded rod, a sliding block is slidably connected to the exterior of the threaded rod, sliding grooves are formed in the left side and the right side of the sliding block, clamping pieces are slidably connected to the inner walls of the sliding grooves, and a motor is fixedly connected to the bottom end of the interior of the machine shell. According to the utility model, the quick disassembly and assembly of the machine cover and the machine shell are realized, the outer part wrapping the cooling pipe is sealed, and cold frost generated after the outer part of the cooling pipe is used is scraped, so that the structural sealing performance of the machine shell is effectively improved.

The invention belongs to the technical field of refrigeration equipment, and particularly relates to a double-effect circulating Stirling cryocooler. According to the technology, a shell and coil windings are included, an annular piston cavity is formed in the shell, a plurality of piston rotors are arranged in the piston cavity, permanent magnets arranged on any two adjacent piston rotors repel each other, and the coil windings are evenly arranged on the outer side wall of the shell along the piston cavity. The piston rotor can be driven to move according to the specified sequence and direction by controlling the electrifying sequence of the coil windings. The noise generated when the Stirling cryocooler works is effectively reduced, the user experience is improved, the structure utilization rate is higher, and the working efficiency is higher.

A wearable garment, such as a vest, for providing thermal conditioning, for example cooling and / or heating, to a user. The vest may be used with cryogenic temperatures. Peltier devices, pre-charged nitrogen canisters, or miniature Stirling cryocoolers may be mounted and built into the wearable or externally carried or mounted thereto. A pump, such as a vacuum diaphragm pump, causes thermally conditioned air to flow through a series of porous regenerative tubing and / or porous panels to supply conditioned air to a user of the garment. The system may use a cryocooler having a pulsating cold finger. The cryo embodiments may supply −200° C. gas through the panels or tubing. Portable systems can be carried or attached, such as HVAC, refrigeration, heating or the like. Control systems may regulate the temperature and may be adjusted by a user, for example using an input pad or a mobile device.

The utility model relates to the field of linear Stirling cryocoolers, in particular to a mover assembly of a linear Stirling cryocooler, which comprises a framework, a plurality of magnetic steels distributed along the circumferential direction are arranged on the peripheral surface of the framework; the hoop is arranged on the outer surface of the magnetic steel in a sleeving manner and is used for fixing the magnetic steel on the framework; the framework gland is arranged at the end part of the framework and is used for tightly pressing the end surface of the magnetic steel; the compression piston has the beneficial effects that the gluing groove is formed in the matching surface of the compression piston and the magnetic steel framework, glue is coated in the gluing groove, laser welding is carried out after the glue is used for bonding, the connection strength of the compression piston and the magnetic steel framework is improved, meanwhile, the rectangular groove is formed in the outer wall of the trapezoidal magnetic steel, and the two semi-circular hoops are bonded in the groove, so that the compression piston and the magnetic steel framework are more stable. The magnetic steel sheets are connected into a whole through the two semicircular hoops, radial looseness of the magnetic steel sheets is prevented, and the magnetic steel sheets are bonded through glue after being axially pressed by the magnetic steel framework gland, so that axial looseness of the magnetic steel sheets is prevented.

The miniature rotary integral Stirling cryocooler comprises a crankcase, a compression piston assembly, a pushing piston assembly and a motor component, and the motor component comprises a motor stator assembly, a rotor spring assembly and a rotor protection sleeve; the compression piston assembly, the pushing piston assembly and the rotor spring assembly are all arranged in the crankcase, the motor stator assembly is arranged above the crankcase, and the crankcase and the rotor protection sleeve are pressed and fixed through a threaded clamping ring. The compression piston assembly is connected with the pushing piston assembly through a connecting rod, the compression piston assembly is connected with the rotor spring assembly through a connecting rod, and the motor stator assembly and the rotor spring assembly are isolated through a rotor protection sleeve. According to the embodiment of the invention, the radial size of the crankcase can be reduced through a sealing and pressing structure which replaces screw pressing and fixing through threaded clamping ring pressing and fixing, so that the height of the refrigerator is reduced, the weight of the refrigerator is reduced, and the miniaturized design of the rotary integral Stirling refrigerator is realized.

The rotor split type Stirling cryocooler comprises a compression rotor machine and an expansion rotor machine, the expansion rotor machine is located at the cold end, and the compression rotor machine is located at the hot end; the compression rotor machine is internally provided with a hot cavity with the volume changing periodically. The expansion rotor machine is internally provided with a cold chamber of which the volume is periodically changed; the difference between the phase angle of a rotor in the expansion rotor machine and the phase angle of a rotor in the compression rotor machine is 90 degrees; a hot cavity with the volume gradually reduced in the compression rotor machine is communicated with a cold cavity with the volume gradually increased in the expansion rotor machine through heat exchange equipment; the hot cavity with the gradually-increased volume in the compression rotor machine communicates with the cold cavity with the gradually-decreased volume in the expansion rotor machine through the heat exchange equipment, and when the hot cavity with the gradually-increased volume is in an expansion starting state, the cold cavity with the gradually-decreased volume communicated with the hot cavity is in a compression starting state. The cooling capacity loss caused by heat conduction of the cylinder body can be avoided.

The cold head structure of the Stirling cryocooler comprises an outer cylinder body, a cold end heat exchanger, a heat regenerator and a hot end heat exchanger are sequentially arranged on the inner wall of the outer cylinder body from the bottom to the opening portion, a porous metal pad is arranged at the bottom of the outer cylinder body, a medium can penetrate through the porous metal pad, and the porous metal pad is attached to the cold end heat exchanger. The middle of the cold-end heat exchanger, the middle of the heat regenerator and the middle of the hot-end heat exchanger are provided with installation openings used for containing air cylinder pipes, the cold-end heat exchanger and the hot-end heat exchanger each comprise a bent plate structure, a plurality of first fan-shaped ventilation holes and second fan-shaped ventilation holes are formed in the bent plate structures in an annular array mode, and the first fan-shaped ventilation holes and the second fan-shaped ventilation holes are arranged in a staggered mode. The corner end of the first fan-shaped vent hole faces outwards, the corner end of the second fan-shaped vent hole faces inwards, an external hot end radiator is arranged on the outer ring of the outer cylinder body, and the position of the hot end heat exchanger corresponds to that of the external hot end radiator. The refrigerator has the advantages of being high in refrigerating efficiency, convenient to produce and simple in structure.

The invention discloses a Stirling cold storage separation type phase change material transfer device. The Stirling cold storage separation type phase change material transfer device comprises a Stirling refrigerator, a constant-temperature phase change material transfer box and a connecting and fixing cold conduction assembly. The Stirling cryocooler comprises a cold head, and the connecting and fixing cold conduction assembly comprises a cold head clamp, a first cold conduction aluminum block, a second cold conduction aluminum block, a first magnet ring and a second magnet ring, the first cold conduction aluminum block is in contact connection with the transfer box inner container, and the second cold conduction aluminum block is connected with the cold head clamp. The Stirling cryocooler is detachably connected with the constant-temperature phase-change material transfer box through a first magnet ring surrounding the first cold conduction aluminum block and a second magnet ring surrounding the second cold conduction aluminum block, and the transfer box of the transfer device is connected with the Stirling cryocooler in a magnetic adsorption mode. And after efficient cold accumulation is achieved through the Stirling cryocooler, rapid separation from the transfer box can be achieved.

The application provides an integrated Stirling cryocooler, comprising: an eccentric shaft box, having a sealed cavity filled with a gas working medium; an eccentric shaft, rotatably arranged in the sealed cavity along an axial direction, having an eccentric section and a non-eccentric section; a stator assembly, arranged along the axial direction and fixed in the sealed cavity; a rotor assembly, arranged on the non-eccentric section along the axial direction and having an air gap along the axial direction with the stator assembly; a compression connecting rod assembly, arranged in the sealed cavity and connected to the eccentric section; and an expansion connecting rod assembly, arranged in the sealed cavity and connected to the eccentric section; wherein the stator assembly and the rotor assembly form an axial flux motor arranged along the axial direction to drive the eccentric shaft to rotate along the axial direction by the rotor assembly. In the integrated Stirling cryocooler, the axial flux motor is formed by the stator assembly and the rotor assembly along the axial direction of the eccentric shaft, so that the size along the axial direction can be reduced, and the overall structure is more compact.

The spherical hinge structure comprises a connecting assembly and a plugging assembly, the connecting assembly comprises a first connecting piece and a second connecting piece, the plugging assembly comprises a first plugging piece and a second plugging piece, and a sealing ring is arranged in an annular groove of the second connecting piece, so that the sealing ring is arranged in the annular groove of the second connecting piece; the matching sizes of the sealing ring, the groove and the inner wall of the cavity are controlled to form uniform and moderate compression amount, so that local stress concentration is avoided, and the surface friction loss of the sealing ring is greatly reduced. Moreover, a floating gap exists between the plugging assembly and the connecting assembly, so that the sealing ring can automatically adjust the position relation in the moving process, the sealing ring is prevented from bearing too large lateral force, a stable working environment is provided for the sealing ring, and it is ensured that the sealing ring can still maintain reliable sealing performance under the working condition of long-term reciprocating motion.

The utility model relates to the technical field of refrigeration equipment, and discloses a Stirling cryocooler based on a built-in vibration reduction structure, which comprises a Stirling cryocooler, the outer side of the Stirling cryocooler is fixedly connected with a plurality of fixing shells, the interiors of the fixing shells are fixedly connected with springs I, one end of each spring I is fixedly connected with a sliding block, and the other end of each spring I is fixedly connected with a damping device. A limiting plate is rotatably connected to the interior of the fixing shell, a driving plate is slidably connected to the interior of the fixing shell, a connecting plate is slidably connected to the bottom of a sliding block, a damping mechanism used for damping parts is fixedly connected to the interior of the Stirling cryocooler, and the damping mechanism comprises two fixing plates. According to the utility model, tools do not need to be found and used, the time for preparing the tools is saved, the operation can be quickly completed, the device is particularly suitable for time-urgent working scenes, such as emergency maintenance, quick equipment replacement and the like, and the working efficiency is greatly improved.

The invention belongs to the technical field of aircraft thermal management, and discloses a high-power hybrid power thermal management system. Comprising a Stirling engine, a high-temperature heat pipe loop, a medium-temperature heat source loop and a low-temperature heat source loop. The Stirling engine comprises a Stirling engine and a Stirling cryocooler which are oppositely arranged, and harmonic oscillators are adopted between the Stirling engine and the Stirling cryocooler for phase modulation. One end of the Stirling engine serves as a high-temperature end to be connected with the high-temperature heat source loop; a room temperature end between the two is connected with a medium-temperature heat source loop; a temperature difference is constructed in the Stirling engine through the high-temperature heat source loop and the medium-temperature heat source loop, external heat is absorbed through the Stirling engine to generate work, and therefore corresponding cooling capacity is generated in the low-temperature heat source loop of the Stirling cryocooler.

The utility model relates to a plate spring and a Stirling cryocooler, which comprise a base circle part provided with a base circle part mounting hole; one end of each cantilever is connected with the base circle part, and the other end of each cantilever freely extends around the vertical central axis of the base circle part in the same direction. The plate spring is light in weight and small in size, the radial rigidity can be effectively improved under the condition that the ratio of the maximum stress to the axial rigidity is not greatly changed, stress distribution is more uniform when the plate spring works, and stress concentration is effectively reduced.

The invention discloses an integral type free piston Stirling cryocooler device which comprises a discharger structure, a power piston structure and a vibration reduction assembly. The power piston structure comprises a power plate spring, a power bearing and a power piston which are sequentially arranged in the axial direction, and the power plate spring is fixedly connected with the power bearing; the discharger structure comprises a first piston, a discharging plate spring and a second piston which are sequentially arranged in the axial direction, and the discharging plate spring is connected with the first piston and the second piston through a first fastener, so that when the first piston and the second piston reciprocate under the action of air pressure difference, the discharging plate spring is connected with the first piston and the second piston. The discharge plate spring radially supports the first piston and the second piston; according to the device, a connecting rod mechanism in a conventional discharger structure is omitted, the movement damping of the discharger is greatly reduced, and meanwhile, hectowatt-level cooling capacity is provided within the temperature range from-196 DEG C to-80 DEG C.

The utility model relates to the technical field of biomedical treatment, and particularly discloses a programmed cooling instrument which comprises a sample cavity, a Stirling cryocooler, a thermoelectric refrigeration device, a heat exchange system and a control system. The sample cavity is located in the center of the top of the programmed cooling instrument and used for storing biological samples. The sample cavity performs graded refrigeration through double refrigeration sources of the thermoelectric refrigeration device and the Stirling cryocooler, smooth transition of the double refrigeration sources is achieved through the control system, and the functions of heat transfer and heat dissipation are achieved through the heat exchange system in the refrigeration process. The utility model aims to solve the problem that the performance of the existing single refrigeration source is limited in a wide temperature range. The method is mainly used for gradually cooling the biological sample in a specific temperature area according to a preset program.

The utility model relates to the technical field of Stirling cryocoolers, and solves the problems that the piston surface is abraded and the service life of a piston is shortened due to the fact that the piston is easy to generate mutual friction in the operating process of the piston in a cylinder. The self-adaptive high-wear-resistance small Stirling cryocooler compression assembly comprises an air cylinder, a piston is arranged in the air cylinder, a driving connecting rod is arranged in the piston, a driving bearing is arranged in the driving connecting rod, a through hole is formed in the surface of the driving connecting rod, and a joint assembly is arranged in a circular groove. The joint assembly comprises a cavity block, the surface of the cavity block is installed in the through hole, an inner ball is rotationally connected into the cavity block, the piston is made of ceramic, lubricating paint is attached to the outer surface of the piston, a driving shaft is inserted into one end of the driving bearing, one end of the driving shaft is inserted into a bearing inner ring of the driving bearing, and the other end of the driving shaft is inserted into a bearing outer ring of the driving bearing. And an inserting groove is formed in one side of the surface of the piston.

The expander assembly of the Stirling cryocooler comprises a cold finger provided with a cold finger air cylinder, a cold finger air cylinder, a cold finger air cylinder and an expander assembly, a shell of the regenerator is in clearance fit with the cold finger air cylinder; the base is connected with the cold finger, and a gas flowing cavity is formed in the base; the spring is respectively connected with the base and the regenerator shell; the expansion machine assembly further comprises a lining connected with the outer wall face of the regenerator shell. The hot end air cylinder is connected and matched with the cold finger air cylinder in a sleeved mode and connected with the inner wall face of the cold finger air cylinder, the hot end air cylinder is arranged outside the lining in a sleeved mode, and the hot end air cylinder and the lining are in clearance seal. According to the application, only the dynamic gap of the hot end cylinder and the lining needs to be sealed, and the gap between the whole regenerator shell and the whole cold finger cylinder does not need to meet the gap sealing requirement, so that the sealing length can be greatly reduced, and meanwhile, the universality between the cold finger cylinder and the regenerator is not influenced.

The invention relates to a Stirling cryocooler service life monitoring device and method, and relates to the technical field of Stirling cryocoolers. Comprising the steps that 1, the gas condition in a compressor in an initial state is monitored, and a pressure value curve a of gas total pressure and a partial pressure value curve b of working medium gas are obtained; the pressure value curve a and the pressure value curve b are the same curve A; 2, the gas condition in the compressor in the working state is monitored, and a pressure value curve a'of the gas total pressure and a pressure value curve b 'of the gas partial pressure of the working medium gas are obtained; and 3, comparing the pressure value curve a'in the step 2 with the pressure value curve b ', comparing with the pressure value curve A obtained in the step 1, and judging the leakage and pollution conditions of the working medium gas in the compressor. By comparing the pressure value curve of the total pressure of the gas with the pressure value curve of the partial pressure of the working medium gas, the performance condition of the Stirling cryocooler is monitored, and an operator can conveniently carry out targeted maintenance on the Stirling cryocooler.

The invention relates to the technical field of Stirling cryocooler structures, and discloses a gas bearing device and a Stirling cryocooler, the gas bearing device is applied to a piston system of the Stirling cryocooler, and the gas bearing device comprises a fixing part, a piston body and a piston rod. The fixed part is fixedly arranged in the Stirling cryocooler; a main cavity is formed in the piston body, communicates with a high-pressure working cavity in the Stirling cryocooler and is used for forming a high-pressure gas environment. A first gap is formed between the piston body and the fixing component, and the piston rod is sleeved in an inner hole of the piston body and forms a second gap with the inner hole. The main cavity is communicated with the two gaps through a plurality of auxiliary flow channels, so that high-pressure gas forms gas lubricating films in the two gaps, oil-free supporting of the piston system is achieved, meanwhile, the piston body and the piston rod are kept at the respective central axis positions through gas thrust, and therefore the movement precision and the operation stability are improved.

The utility model relates to a rotary Stirling cryocooler which comprises a base, a compression assembly, a pushing assembly, a motor rotor assembly and a motor stator assembly, the compression assembly, the pushing assembly and the motor stator assembly are all installed on the base, the motor stator assembly comprises a motor stator and a motor shell, and the motor stator and the motor shell are fixed. The motor rotor assembly comprises a motor rotor and a motor rotating shaft, the motor rotor and the motor rotating shaft are coaxially arranged and fixed, and the motor stator is arranged in the motor rotor. By adopting the design that the motor stator is internally arranged and the motor rotor is externally arranged, the strength and the stability of a shaft system are remarkably improved, a bearing with a higher specification can be selected, the dependence on a miniature bearing is reduced, the development difficulty of the refrigerating machine is reduced, and the overall performance and the long-term reliability of the refrigerating machine are further enhanced.

The utility model discloses a nitrogen liquefaction storage system for a horizontal Stirling cryocooler process, which relates to the field of nitrogen liquefaction storage and comprises a tank body, end covers are arranged on the left side and the right side of the tank body, the end covers and the tank body are welded seamlessly, three refrigeration pipelines are arranged at the top of the tank body, and a plurality of fixing frames are connected to the top of the tank body. A mounting frame is mounted on the fixing frame, and three sets of refrigerating machines are mounted in the mounting frame and connected with a refrigerating pipeline through flange plates. According to the utility model, the plurality of refrigerators are additionally arranged on the tank body, nitrogen separated from air is liquefied by utilizing the refrigerators during use, and liquefied liquid nitrogen is stored in the tank body, so that the liquid nitrogen which is just liquefied can be directly used, and the problem that the transportation cost is increased due to repeated transportation is avoided; and the tank body is formed by seamless welding, and the liquid nitrogen is directly compressed in the tank body, so that the sealing performance of the tank body on the liquid nitrogen is improved, and leakage is avoided.

The utility model discloses a nitrogen liquefaction storage system for a double-head Stirling cryocooler process, which relates to the field of nitrogen liquefaction storage and comprises a base, a liquid nitrogen tank is connected to the top of the base, an end cover is arranged at the top of the liquid nitrogen tank, the end cover and the liquid nitrogen tank are seamlessly welded, and two groups of mounting frames are connected to the top of the end cover. A refrigerating machine is mounted on each mounting frame, and a refrigerating pipeline is connected to the top of the end cover. Nitrogen separated from air is guided into the air inlet pipe and then enters the refrigerating pipeline through the air inlet pipe, the refrigerating machine communicated with the refrigerating pipeline is used for refrigerating the nitrogen, so that the nitrogen is liquefied to form liquid nitrogen, and the liquid nitrogen is guided into the liquid nitrogen tank and can be directly used after nitrogen making. In addition, the liquid nitrogen tank and the end cover are formed in a seamless welding mode, the liquid nitrogen is directly compressed in the liquid nitrogen tank, the sealing performance of the liquid nitrogen tank to the liquid nitrogen is improved, and leakage is avoided.

The invention discloses a high-power Stirling cryocooler for a refrigerator and the refrigerator. The high-power Stirling cryocooler comprises a shell assembly, an air cylinder assembly, a piston assembly and a linear motor, wherein the air cylinder assembly and the piston assembly are arranged in the shell assembly; the air cylinder assembly comprises an integrated air cylinder, the piston assembly comprises a power piston mechanism, and the power piston mechanism comprises a power piston; the linear motor sequentially comprises an inner magnet yoke, a magnet ring and an outer magnet yoke from inside to outside in the radial direction of the linear motor, the outer magnet yoke is provided with a concave portion facing the magnet ring, the concave portion is used for winding a coil, a magnet ring bearing frame is arranged at the lower end of the magnet ring, and the magnet ring bearing frame is connected with the power piston. The linear reciprocating motion of the magnetic ring drives the magnetic ring bearing frame to do linear reciprocating motion, and then the power piston is driven to do linear reciprocating motion in the integrated air cylinder. According to the refrigerator, collaborative optimization is conducted on the structure level and the control level, so that the overall efficiency is improved, vibration noise is reduced, and efficient operation within the wide working condition range is achieved.

The utility model relates to the technical field of blanking machines, in particular to a special grinding auxiliary material blanking machine for a Stirling cryocooler, which comprises a base, and a blanking table is mounted in the middle of the upper surface of the base. An auxiliary material blank is placed above the blanking male die, the air cylinder is started to work to drive the blanking female die to move downwards, so that the blanking male die and the blanking female die are closed, auxiliary materials are cut out, waste materials can be ejected into the waste material groove by the blanking male die, the annular sliding block is pushed to move upwards, at the moment, the spring is compressed, and the waste materials are discharged. The air cylinder is started to work to drive the blanking female die to move upwards, when the blanking female die is separated from the blanking male die, the spring can push the annular sliding block to move downwards so that auxiliary materials can be discharged, waste is collected through the waste groove, the waste is discharged through the spring and the annular sliding block, the cut waste cannot be accumulated in the die, and the blanking female die and the blanking male die are not prone to falling off. And the blanking precision in subsequent use is guaranteed, the phenomenon of die damage is avoided, and the practicability is higher.

The stepping type Stirling cryocooler comprises a shell, an installation cavity formed in the shell, a first piston and a second piston, the first piston and the second piston are located in the installation cavity, an electromagnetic pole set is fixedly installed in the installation cavity, and the electromagnetic pole set is provided with a plurality of coil windings arranged side by side in the axial direction of the shell. A piston cavity distributed in the axial direction of the electromagnetic pole set is formed in the center of the electromagnetic pole set, the first piston and the second piston are both arranged in the piston cavity, and the first piston and the second piston can be driven to move in the piston cavity according to the specified sequence and direction by controlling the power-on sequence of the coil winding. The Stirling cryocooler has the advantages that the internal rotor can be driven in a non-contact mode to move according to the specified sequence, and noise generated when the Stirling cryocooler works is effectively reduced.

The utility model relates to the technical field of biomedical equipment, and discloses a cooling instrument which comprises a cooling instrument shell, a top cover and a control panel, an opening is formed in the upper end of the cooling instrument shell, a Stirling cryocooler is arranged in the cooling instrument shell, a heat preservation frame is arranged at the opening in the upper end of the cooling instrument shell, and a containing frame is arranged in the heat preservation frame. An air inlet is formed in the upper end of the side wall of one side of the cooling instrument shell, and a dustproof assembly is arranged on the side wall of the cooling instrument shell and located at the air inlet. According to the cooling instrument, by arranging the filter screen, external dust and garbage can be effectively filtered, the two L-shaped clamping strips are pressed to be close to each other, when the ends of the L-shaped clamping strips are separated from the clamping grooves, and then the L-shaped clamping strips are pulled outwards, the filter screen can be effectively taken out, and the filter screen can be conveniently cleaned or replaced in time.

The invention discloses a rotary integrated Stirling cryocooler press sealing structure, which relates to the Stirling cryocooler technology, and comprises a press end cover (1), a first structural groove is formed in the sealing surface of the press end cover (1); the press end cover (1) and the crankcase (2) are connected and installed, the face, connected and installed with the press end cover (1), of the crankcase (2) is a sealing face, and the sealing face of the crankcase (2) is provided with a second structural groove; and the metal sealing wire (7) is arranged between the first structure groove and the second structure groove, and the metal sealing wire (7) extends and deforms under the action of pretightening force in the installation process of the press end cover (1) so as to achieve sealing. According to the sealing structure, the sealing reliability can be greatly improved, and the problem of sealing failure caused by bending deformation after the press end cover is fastened in an existing sealing structure is solved.