143 results about "Expansion chamber" patented technology

An improved AR platform firearm includes modular brass deflectors and brass catches; sleeved takedown and pivot pinholes; a cam latch device for a secure upper / lower receiver connection; a two-piece upper receiver; a taper-fit barrel system; a barrel alignment system using a barrel alignment washer; a charging handle that positively engages with the bolt carrier; a charging handle retention system using a spring detent; a bolt carrier with rear wall to absorb shear force on the gas key or anvil; a leak-proof gas system using a straight gas tube, ferrule and threaded connection with the gas block; a gas block stop notch that mates with a gas block key; a gas block jam nut for holding the gas block in place; an interchangeable gas system; an expansion chamber; a handguard with adjustable weights; a handguard lock-up mechanism; a handguard extender; and a sloped Picatinny rail for extending scope utilization.

A valve unit for an anti-lock braking system has a valve body, a piston, and an elastic element acting on the piston. The valve body has an outlet port, an inlet port, a primary chamber communicating with the outlet port, an expansion chamber with an outflow passage establishing fluid communication between the primary chamber and the expansion chamber, and a bypass passage between the inlet port and the outlet port. The piston is movable in the primary chamber and has a longitudinal through cavity, a first transversal surface facing the outlet port, and a second transversal surface facing away from the outlet port. The first transversal surface has an area smaller than the area of the second transversal surface. The elastic element exerts an elastic force to move the piston away from the outlet port. The valve unit is activatable by pressure of a brake fluid in the primary chamber.

This invention relates to the field of magnetic bearing technology, solving the problem of magnetic levitation bearings being easily damaged by impurities and particulate matter. It proposes a magnetic bearing purification and protection system, including a magnetic levitation bearing installed in an expander. The magnetic levitation bearing is connected to a main shaft, which is fixedly connected to an impeller in the expansion chamber of the expander. An air chamber is provided around the expansion chamber, connected to it via an air inlet perpendicular to the impeller shaft. The air outlet direction of the expansion chamber is along the impeller shaft towards the outside of the expander. The impeller is equipped with a throttling orifice device to remove impurities from the magnetic levitation bearing. The inlet of the air chamber is connected to a filter purification device to remove impurities and particulate matter from the gas. This invention ensures the stable operation of the magnetic levitation bearing and the safe operation of the system.

The utility model provides a liquid expansion mandrel fixing device for processing a hard chromium plated ball, which belongs to the technical field of hard chromium plated ball processing, and comprises a mandrel main body, and the inner part of the mandrel main body is divided into cavities and is used for realizing uniform expansion; a filling hole is formed in one side of the core shaft main body and is used for filling a hydraulic medium into the core shaft main body; a sealing screw is arranged at an opening of the filling hole; an expansion chamber and a compression chamber are arranged in an inner cavity of the mandrel body, the compression chamber is arranged on one side of a center shaft of the mandrel body, and a linkage structure is arranged in the compression chamber and used for clamping a ball. The utility model provides a liquid expansion mandrel fixing device for processing a hard chromium plated ball, which can solve the problems that the clamping force is concentrated on a local area and a plating layer is easy to crush due to the single-cavity design of the existing liquid expansion mandrel.

A double membrane pump having a casing and a piston rod movably received in the casing, the casing having at least one inlet opening and at least one outlet opening, and a first membrane is arranged at one end of the piston rod and a second membrane is arranged at the other end of the piston rod. The first membrane is arranged in a first chamber of the double membrane pump and the second membrane is arranged in a second chamber. The membranes are designed to separate the chambers into a product chamber and an expansion chamber respectively. The pump has a drive device for bringing about a translational movement of the piston rod. The double membrane pump has a piston rod which is designed to perform a self-regulated, oscillating movement and thus enables simplified control of the membranes.

The invention discloses a denitration, desulfurization and noise elimination integrated purification system for a ship. The system comprises a cylindrical shell, and the interior of the cylindrical shell is divided into two cavities, namely a first expansion cavity and a second expansion cavity, by a perforated plate and a perforated pipe which are fixed to the cylindrical shell; the perforated pipe serves as an inner electrode, the cylindrical shell serves as a grounding electrode, an annular space among the perforated plate, the perforated pipe and the aluminum oxide ceramic serves as a discharge area, and the first expansion cavity and the second expansion cavity serve as an absorbent premixing and primary silencing unit and a plasma reaction and secondary silencing unit respectively. And a chemical absorption unit and a waste liquid collection unit are arranged at the downstream of the plasma reaction and secondary silencing unit in the tail gas flowing direction. According to the system, the two stages of expansion cavities and the tubular electrodes installed on the perforated plate form a composite noise elimination structure, and remarkable noise reduction is achieved. The device has the outstanding advantages of being compact in structure, light in weight, free of catalyst dependence, efficient in working in a wide temperature range and the like, and has a good reduction effect on harmful gas in low-temperature flue gas of a ship engine.

The present invention relates to a Stirling engine and provides a composite heat source Stirling engine heat collection system, comprising a heating cavity, a heating tube cluster, a combustion heating device and a flue gas outlet, wherein the heating tube cluster is surrounded by the heating cavity arranged outside the heating cavity, the outer wall of the heating cavity is a light-transmitting layer, a solar energy concentrating heat collection device is arranged outside the light-transmitting layer to concentrate sunlight and enable it to pass through the light-transmitting layer to heat the working fluid in the heating tube cluster, the heating cavity is provided with the combustion heating device and the flue gas outlet, the heating tube cluster is formed by arranging a number of heating tubes, the working fluid inlet of the heating tube cluster is connected to a regenerator, and the working fluid outlet of the heating tube cluster is connected to an expansion chamber. The composite heat source Stirling engine heating system of the present invention can enable the Stirling engine to work all day and night, making up for the unstable and discontinuous characteristics of solar energy and improving the reliability of the Stirling engine.

The utility model discloses a heat exchange system and a vehicle, and relates to the technical field of vehicles, the heat exchange system comprises an expansion box, the interior of the expansion box is provided with two mutually independent expansion cavities, one of the two expansion cavities is communicated with a first heat exchange loop, and the other of the two expansion cavities is connected with a second heat exchange loop; the driving pump is provided with two runners which are independent of each other, one of the two runners communicates with the first heat exchange loop so as to drive the heat exchange medium to flow in the first heat exchange loop, and the other runner communicates with the second heat exchange loop so as to drive the heat exchange medium to flow in the second heat exchange loop; and the other one of the two flow channels communicates with the second heat exchange loop so as to drive a heat exchange medium to flow in the second heat exchange loop. According to the technical scheme provided by the utility model, a traditional pure electric liquid cooling vehicle type cooling system is simplified.

The invention particularly relates to a flow dividing assembly and heating and ventilation equipment. The flow dividing assembly comprises a distributor and a second connecting pipe. The distributor is provided with an inflow hole, an expansion cavity and a plurality of flow dividing holes which are formed in sequence, and the inflow hole communicates with the flow dividing holes through the expansion cavity. And at least part of the second connecting pipe penetrates through the inflow hole and extends to the insertion section in the expansion cavity. In the direction from the inflow hole to the diversion hole, the first end of the insertion section is used for allowing a refrigerant to flow in, the second end of the insertion section is in a closed state and located in the expansion cavity, a plurality of outflow holes are formed in the circumferential direction of the insertion section, and the inflow holes are located in the expansion cavity and spaced from the second end of the insertion section. According to the flow dividing assembly, the blind pipe structure at the second end of the insertion section is used for mixing the backflow effect caused by flowing of gas and liquid refrigerants at the inlet, the effect of fully mixing the gas and liquid refrigerants is achieved, and the problems of bias flow caused by non-uniform distribution of the refrigerants in the inflow pipe and non-uniform mixing of the refrigerants in an old distributor are solved.

This invention discloses an ejection device with an adjustable expansion chamber volume, comprising: a base support, a launch tube, and an ejection controller. The launch tube is mounted on the base support, the expansion chamber is located at the rear of the launch tube, the directional device is located at the head of the launch tube, and the combat load is set inside the directional device. The expansion chamber contains a spring A, a movable base plate, and a limiting device. One end of spring A is connected to the inner bottom surface of the closed end of the expansion chamber, and the other end is connected to surface A of the movable base plate. The limiting device is used to limit the movable base plate. A cavity is formed between surface B of the movable base plate and the bottom surface of the combat load. The ejection controller controls the ejection power source to generate a working medium, which is released into the cavity to generate pressure, thereby ejecting the combat load. This invention can dynamically adjust the expansion chamber volume according to the expansion chamber pressure during the ejection process, reducing overload on the load, avoiding adverse effects on the electronic components of the load, and also reducing the recoil generated by the ejection, thus achieving miniaturization of the ejection device.

The invention discloses an impedance silencing device and a working method thereof.The device comprises a silencer barrel, an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are located at the two ends of the silencer barrel, the impedance silencing device is characterized by further comprising a silencing assembly and a flow guide mechanism, the silencing assembly and the flow guide mechanism are arranged in the silencer barrel, the inner diameter of the air inlet pipe is gradually increased in the airflow direction, and the outer diameter of the air outlet pipe is gradually increased in the airflow direction. The inner diameter of the air outlet pipe is gradually reduced in the airflow direction, and the air inlet pipe, the silencer barrel and the air outlet pipe form an expansion chamber structure. The silencing assembly comprises silencing plates which are fixedly arranged in the silencer barrel and divide an inner cavity of the silencer into a plurality of silencing channels connected in parallel. The flow guide mechanism comprises a flow guide cone arranged on the air inlet pipe, the flow guide cone is connected with a control assembly used for controlling the flow guide cone to move in the axial direction of the silencer barrel, the problem that the silencing performance and operation energy consumption of a fixed silencer cannot be considered at the same time under the variable working conditions is solved, and self-adaptive broadband efficient silencing and energy-saving operation are achieved.

The four-turbine double-exhaust-port diesel engine comprises a silencer body, a left air inlet cavity, a middle cavity and a right air outlet cavity are formed in the silencer body, the left air inlet cavity is provided with two air inlet pipes, the middle cavity is provided with two perforated pipes, and the right air outlet cavity is provided with two air outlet pipes; the two ends of the perforated pipe are connected with the left air inlet cavity and the right air outlet cavity respectively, and a first partition plate is arranged in the middle of the perforated pipe. The silencer is reasonable in structural design, and the flowing direction of gas in the silencer is the gas inlet pipe, the left side gas inlet cavity, the left side of the perforated pipe, the middle cavity, the right side of the perforated pipe, the right side gas outlet cavity and the gas outlet pipe in sequence. Noise reduction is carried out through an expansion cavity with the size larger than two times of the size of a single-inlet-single-outlet silencer, and the noise reduction effect is greatly improved.

The utility model discloses a steam jet pump, including the pump body and its inside chamber, the chamber inside is provided with mixing chamber, compression chamber, throat pipe and expansion chamber in proper order, and the communicating pipe is communicated with the chamber on the pump body, and the steam inlet and steam outlet of pump body and the communicating pipe are all set up a plurality of groups of through -hole for bolt to pass through on the one end away from the pump body, and the through -hole all is provided with fixed cylinder, and the fixed cylinder is provided with the locating cylinder, and the locating cylinder is provided with internal thread in, and the locating cylinder is located fixed cylinder outside one end and is equipped with gear, and the steam inlet and steam outlet and the communicating pipe each side to the pump body is provided with drive ring, and the drive ring inner wall is provided with the rack that is engaged with the gear, and the conventional pump body's each interface is all provided with a plurality of groups of bolt nut and is connected and is installed, and personnel one one is very troublesome to tighten and dismount, and it is not convenient when replacing maintenance, the utility model discloses can improve the dismounting efficiency of pump body butt joint.

The present invention provides a pre-separation system for an oil-gas separator and an oil-gas separator, belonging to the technical field of automotive parts. The system comprises a housing, an expansion chamber, an impact chamber, a climbing chamber, and a falling chamber arranged in sequence along the separation path of the oil-gas mixture, wherein the expansion chamber and the impact chamber are connected by a drainage channel, the impact chamber and the climbing chamber are arranged side by side, and the climbing chamber and the falling chamber are separated by a partition, so that the climbing chamber and the falling chamber are spliced ​​to form a U-shaped structure with the opening facing downward. The present invention achieves the environmental protection, emission, and safety requirements of the vehicle through reasonable layout, and the pre-separation system has a compact structural design, a higher oil-gas separation efficiency, and thus a higher oil recovery rate and a higher degree of waste gas reuse, which is more conducive to environmental protection and resource conservation.

The application discloses a kind of karst region adaptability modular expansion pile device and its construction method, belong to pile foundation engineering technical field, the device includes by a plurality of modular pile section splicing and is fixed by connecting piece and is formed pile body, expansion chamber, grouting system, valve control and pressure monitoring system and monitoring assembly are arranged in the pile body, the bottom end of pile body is fixed with bottom disc, and the bottom surface of bottom disc is provided with a plurality of drill bits, and the inner cavity of pile body is provided with mud filling pipeline along the axial direction.The grouting system includes the grouting pipeline arranged along the inside of pile body, and the grouting port is arranged in communication between the grouting pipeline and expansion chamber, and the switch valve is arranged on the grouting port branch, and the pressure monitoring unit is arranged on the grouting pipeline, and the monitoring assembly includes multidimensional sensor.The application can simplify construction process, reduce material consumption, improve the adaptability, reliability and safety and stability of pile foundation construction in karst region.

This utility model discloses a self-venting centrifugal pump for transporting lithium carbonate gas-liquid mixtures, relating to the field of fluid transport equipment technology. The aim is to achieve gas-liquid separation transport using a centrifugal pump, and the following technical solution is proposed: It includes a pump body, a first rotating shaft disposed within the pump body, a pump cover mounted on the rear side of the pump body, and a mechanical seal housing mounted on the rear side of the pump cover. An impeller is mounted on the first rotating shaft, and a second rotating shaft, coaxially arranged with the first rotating shaft, is disposed within the mechanical seal housing. A vacuum wheel is mounted on the second rotating shaft. An expansion chamber is formed at the bottom of the mechanical seal housing, and the expansion chamber is connected to the impeller chamber via the vacuum wheel chamber containing the vacuum wheel. This utility model provides an effective gas discharge path, allowing the centrifugal pump to focus on liquid transport, while the gas inside the centrifugal pump is discharged through the expansion chamber on the mechanical seal housing, thereby achieving gas-liquid separation transport in the centrifugal pump.

The invention discloses a fireproof air brake with a self-checking function, and relates to the technical field of fireproof air brakes. Comprising a brake frame, an opening and closing connecting rod assembly, a handle, an end cover, a flashboard assembly, a shaft cleaner and a limiting strip. When the fireproof air brake fails and cannot be closed actively, an expansion medium in an expansion cavity is used for absorbing heat in a fire disaster, the expansion medium expands and drives a push ring on a sliding rod to push a protection piece to move, and a rotary drum is unlocked; and the rotary drum drives the flashboard sheets on the rotary drum to turn over and close, so that automatic closing in a fault state is realized. After the rotary drum is unlocked, the conical head is further driven by the expansion medium to eject the self-locking block out of the self-locking sliding groove, the top of the self-locking block abuts against the inner wall of the rotary drum to generate friction, the more the expansion medium absorbs heat, the larger the thrust borne by the piston head is, the larger the abutting thrust of the self-locking block to the inner wall of the rotary drum is, and the larger the friction force between the top of the self-locking block and the inner wall of the rotary drum is. Therefore, self-locking of the rotating drum and the rotating shaft body is achieved, and the purposes of automatic closing and self-adaptive locking of the gate plate in case of failure are achieved.

This invention relates to a five-axis machining center for metal processing, belonging to the field of metal processing equipment, and aims to solve the problems of clamping force attenuation, vibration, and inconvenience in disassembling and assembling the milling head during high-speed milling in existing equipment. It includes a machine tool body, a milling spindle, and a milling head. The end of the milling spindle is equipped with a hydraulically clamped milling head fixing mechanism, comprising a closed hydraulic expansion chamber, multiple sets of tilting embedded centrifugal compensation cylinders, and a milling vibration reduction assembly. The locking bushing within the hydraulic expansion chamber can radially elastically deform to grip the milling head shank. The counterweight piston within the centrifugal compensation cylinder generates centrifugal force with the rotational speed, linking a hydraulic linkage circuit to achieve dynamic compensation of the clamping force. Simultaneously, the milling vibration reduction assembly absorbs energy through damping springs and dissipates vibration through energy-dissipating sliders. This invention balances high-speed clamping stability, vibration resistance, and automation adaptability, extending the life of equipment and tools, and improving the high-speed precision machining capability and automation level of the machining center.

The invention relates to the technical field of magnetic bearings, solves the problem that a magnetic bearing is easily damaged by impurities and particles, and provides a magnetic bearing purification protection system which comprises a magnetic bearing arranged on an expansion machine, the magnetic bearing is connected with a main shaft, and the main shaft is located in an expansion chamber of the expansion machine and fixedly connected with an impeller. The periphery of the expansion chamber is provided with an air cavity, the air cavity is connected with the expansion chamber through an air inlet channel, the air inlet channel is perpendicular to the axis of the impeller, the air outlet direction of the expansion chamber is from the axis of the impeller to the outer side of the expansion machine, and the impeller is provided with a throttling hole device for separating impurities from the magnetic suspension bearing. And an inlet of the air cavity is connected with a filtering and purifying device for removing impurities and particulate matters in the air. According to the invention, the stable operation of the magnetic suspension bearing and the safe operation of the system are ensured.

The invention relates to the field of switches with arc extinguishing or arc preventing devices, in particular to a self-energy arc extinguishing chamber and a circuit breaker. The self-energy arc extinguish chamber comprises an air compression chamber cylinder barrel internally provided with a partition plate, a moving contact is installed in the air compression chamber cylinder barrel in a sealed and sliding mode on the front side of the partition plate, the moving contact is connected with a transmission rod penetrating through the partition plate in a sealed and sliding mode, an exhaust port is formed in the transmission rod, and an expansion chamber is formed in the moving contact. An air compression chamber is formed between the partition plate and the moving contact in the air compression type cylinder barrel, an exhaust chamber is formed on the side, opposite to the air compression chamber, of the partition plate, a pressure release valve and an air supplementing valve are arranged on the partition plate, a check valve is arranged on the moving main contact, an air supplementing opening is formed in the cavity wall of the exhaust chamber, and an air guide channel is formed between the air supplementing opening and the air supplementing valve. Gas exhausted from the transmission rod is isolated through the gas guide channel. Therefore, the high-temperature decomposed gas and impurities can be prevented from being supplemented into the air compression chamber along with the insulating gas, so that the gas supplemented into the air compression chamber is relatively clean insulating gas, and the arc extinguishing effect of the arc extinguishing chamber is improved.

The utility model discloses an oil product storage tank convenient to adjust balance, which relates to the technical field of oil product storage and specifically comprises a tank body, a capacity expansion chamber is arranged at the top of the tank body, an inflatable air bag is fixedly connected in an inner cavity of the capacity expansion chamber, and the top of the inflatable air bag is connected with a breather valve through a first telescopic pipe. A lifting plate is movably connected into an inner cavity of the tank body, a pressure sensor, a temperature sensor, a one-way air inlet valve and a one-way exhaust valve are arranged at the bottom of the lifting plate, and the inner cavity of the tank body is connected with an inner cavity of the inflatable air bag through the one-way air inlet valve and the one-way exhaust valve. According to the oil product storage tank convenient to adjust balance, through the arrangement of a cooling structure, a heating structure and a heat preservation pad, when the oil product storage tank is used, an oil product and oil gas stored in the tank body can be actively heated or cooled, the temperature of the oil product and the temperature of the oil gas are adjusted and controlled, the temperature of the oil product is kept stable, breathing loss in the oil product storage process is reduced, and the service life of the oil product is prolonged. And oil-gas loss is reduced.

This utility model relates to the field of pipeline sealing technology, and in particular to an adjustable expansion sealing ring, aiming to solve the technical problem that existing sealing rings are prone to excessive expansion or deformation in unnecessary areas, leading to a decrease in sealing reliability. Specifically, it includes an inner ring and an outer ring arranged coaxially, with the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring fixedly connected. The inner ring has an annular support groove inside, and an annular support member is installed inside the support groove. The outer ring has multiple expansion chambers arranged equidistantly along the circumference of the outer ring, and each expansion chamber contains a water-swellable filler. This utility model, by providing multiple independent expansion chambers and corresponding water inlets within the outer ring, ensures that when local leakage occurs in the pipeline, only the filler near the leakage point expands through the water inlet, avoiding unnecessary deformation caused by traditional integral expansion structures and improving sealing reliability.

The present disclosure provides a virial coefficient measurement device based on the continuous expansion method. In the device, a gas source, multiple expansion chambers, and an exhaust unit are connected in series in sequence; the measurement module controls the exhaust unit to open all the stop valves at the beginning of the measurement to first evacuate the expansion chamber; then all the stop valves are closed, and starting from the expansion chamber closest to the gas source, a fixed amount of gas provided by the gas source is sequentially introduced into each expansion chamber by controlling the stop valve, so that each expansion chamber is gradually connected in the order of connection; each time a new expansion chamber is connected, the pressure gauge and the thermostat data are recorded. After completing the inflation of all the expansion chambers, a linear fit is performed using the recorded data, and the two coefficients of the fitting line are the two virial coefficients. The present invention can obtain the first virial coefficient and the second virial coefficient applicable to different gases in the static expansion method, ensuring the accurate calibration of the vacuum gauge by the static expansion method.

The utility model relates to air compressor technical field discloses a low noise air compressor, including compressor body, the top of compressor body is provided with compression pump chamber, and the top of compression pump chamber is connected with air inlet pipe and air outlet pipe, make the air form spiral guide flow before entering compression pump chamber through setting up spiral air deflector and the structure of closed column, relieve the screeching noise caused by the sudden inrush airflow, through setting up the combination structure of expansion chamber, gather together chamber and perforated pipe in the air outlet end in proper order, form the exhaust path of " expansion - contraction - expansion", effectively slow down the sound wave impact in the high pressure air sudden release process, simultaneously, the flexible bellows and perforated plate cooperation sound absorbing material are embedded in the exhaust passage, realize multistage noise reduction, the rubber sheet is clamped for buffering connection vibration in the air filter chamber and air inlet pipe junction, sets up the rubber connecting seat in the bottom, further absorbs the structural vibration in the compressor operation.

Apparatuses, kits, and methods for enhancing handling of a sample cylinder of liquified petroleum gas may include a housing, a first mounting station, and a second mounting station. The first mounting station may include a first mounting fixture connected to the housing and configured to attach to the sample cylinder, and the second mounting station may include a second mounting fixture connected to the housing and configured to attach to an expansion chamber. A first valve may provide fluid flow from the sample cylinder to a waste destination or fluid flow from a source of pressurized gas to the sample cylinder. A second valve may provide fluid flow from the sample cylinder to the expansion chamber and a third valve may provide fluid flow from the expansion chamber to a waste destination.

The present invention relates to a Flywheel Engine utilizing Flywheel with Peripheral Multiple Expanding Chambers, powered by Energies generation, each of which are used for accommodate one or more: Compressed Air, Hydrogen / generation, Water, Steam / generation, Energies Storage and Energies Supplies (CAHWSESES), creates combinations of Energies Supplies. When combining mixing of Pressurized Air and Water suppling Aeration water, integrated in hot Water / Solar Steam generation apparatuses, used for storing solar electricity or from grid electricity. moreover, combined with high pressure Air and Residual heat integrate Compressed Air with Residual Water, Hydrogen generation, using Solar PV electric and Solar Thermal energies. An innovative breakthrough technology, where the energies are channeled into peripheral expanding chambers, combined with fluid jets attached to a flywheel (CAHWS), and integrate with Electric Generator / Alternator, as well as mechanical energy output, which multiplying the energies that is exist / supplied today in the world market, defined as energies supplied from Energies Storage systems and generate various electricity and hot water generation system (e.g. about 2 times and more). Moreover, innovative Energies Storage and Energies Supplies with all mechanical systems have a lifespan of at least, 2 generations with the price lower than acid / salt batteries or lithium batteries or any other Energy storage Energy Supply, and this without the needs for chemical tanks.Innovations without the need for:1. Heat pumps for DHWS.2. Gas, Diesel, Mechanical combustion fossil Gasoline Engine and Electric diesel fuel generator.3. EV / Storage Lithium batteries.4. Mechanical elevations / lifting storage.As described above, currently available on the world market.

An inline muffler for use with a positive airway pressure (PAP) apparatus. The muffler may provide an expansion chamber with baffles that capture acoustic energy using, for instance, a disruptive gas flow path to effectively reduce downstream noise associated with a flow of pressurized gas produced by the PAP apparatus. In some embodiments, the muffler is constructed of two mostly identical halves with baffle segments being integrally formed therewith.

The application provides a silencing assembly and a scroll compressor. The silencing assembly comprises a cover, a cover fastening air inlet, and a silencing cavity constituting exhaust air; a side wall of the cover is provided with an exhaust port; at least an annular partition plate is arranged in the silencing cavity to cover the air inlet, the partition plate separates the silencing cavity into a first chamber and a second chamber which are isolated from each other; the first chamber is located at the inner side of the partition plate and is communicated with the exhaust port, and the second chamber is located at the outer side of the partition plate; the partition plate is provided with an opening which is communicated with the first chamber and the second chamber. The partition plate is arranged in the silencing cavity formed between the cover and the air inlet, a composite noise reduction structure combining resistive expansion chamber silencing and resistive interference silencing is formed, the airflow pulsation noise generated by the exhaust port of the static scroll when the compressor operates at various frequency bands can be weakened, and then the operating noise of the compressor is reduced, and the comfort is improved.

The application provides a reversing-coupled Stirling power system, a design method and an operation method, comprising two sets of Stirling power subsystems; a heat side channel and a cold side channel are arranged in a regenerative heat exchanger, the heat side channel is specially used for containing regenerative heat-releasing working medium, the cold side channel is specially used for containing regenerative heat-releasing working medium, the heat side channel and the cold side channel respectively form a stable temperature gradient therein, the pipeline life is improved, and the system safety is high; the Stirling power subsystem comprises a heater, a piston assembly and a cooler, a first end of the heater is connected with an expansion chamber, a first end of the cooler is connected with a compression chamber, through reversing switching, the two sets of Stirling power subsystems can switch the connection state with the heat side channel and the cold side channel, the two sets of Stirling power subsystems can use the same regenerative heat exchanger, and the heat side channel and the cold side channel therein can be efficiently switched to meet the demand of the Stirling power subsystem on the heat exchange area under different regenerative states.

The application provides an air circulating machine, which comprises an expander part, a compressor part, a fan part and a main shaft, the main shaft passes through the expander part, the compressor part and the fan part, a first radial bearing, a second radial bearing, a first thrust bearing and a second thrust bearing, a first air bleeding pipeline and an air inlet channel, one end of the first air bleeding pipeline can introduce gas from an expansion chamber of the expander part, the other end of the first air bleeding pipeline is communicated with one end of the air inlet channel, the other end of the air inlet channel is communicated with a first bearing cavity, a cooling channel is arranged in the main shaft, the cooling channel can guide the gas in the first bearing cavity to a second bearing cavity, and the gas after passing through the second radial bearing can be guided to a suction port of the compressor part. The application can effectively take away the friction heat of high-speed bearings, improve the stability of a high-speed rotating rotor system, recycle the discharged high-pressure gas flow, axially position the compressor part and improve the positioning precision.