135results about How to "Reduce swirl" patented technology

A flow mixer and conditioner for use within a conduit conditions flowing media within the conduit to provide a swirl-free, symmetric, and reproducible velocity profile regardless of upstream flow distortions, disturbances, or anomalies. Tabs are cut from a single plate and bent or affixed to provide mixing and conditioning of the flowing media. Single tabs or tab pairs emanating from common vertices can be formed so that they diverge in, or against, the direction of flowing media. The flow conditioner requires as little as three pipe diameters downstream and upstream to mix and condition the flow stream allowing close placement to elbows, valves, tees, and other disturbances typically seen in industrial plants.

A flow conditioner for use within a conduit conditions flowing media within the conduit to provide a swirl-free, symmetric, and reproducible velocity profile regardless of upstream flow distortions, disturbances, or anomalies. Tabs are cut from a single plate and bent or affixed to provide conditioning of the flowing media. Single tabs or tab pairs emanating from common vertices can be formed so that they diverge in, or against, the direction of flowing media. The flow conditioner requires as little as three pipe diameters to condition the flow stream allowing close placement to elbows, valves, tees, and other disturbances typically seen in industrial plants.

A pump assembly and components therefor including an impeller which has flow inducer elements on an inner surface of a front shroud thereof, a flow directing device or strainer having passageways for delivering material to the impeller and at least one flow circulating passageway and a pump casing having an intake section with flow distribution vanes in the region of a feed opening adjacent the intake section.

A flow mixer and conditioner for use within a conduit conditions flowing media within the conduit to provide a swirl-free, symmetric, and reproducible velocity profile regardless of upstream flow distortions, disturbances, or anomalies. Tabs are cut from a single plate and bent or affixed to provide mixing and conditioning of the flowing media. Single tabs or tab pairs emanating from common vertices can be formed so that they diverge in, or against, the direction of flowing media. The flow conditioner requires as little as three pipe diameters downstream and upstream to mix and condition the flow stream allowing close placement to elbows, valves, tees, and other disturbances typically seen in industrial plants.

A system includes a gas turbine combustor, which includes a combustion liner disposed about a combustion region, a flow sleeve disposed about the combustion liner, an air passage between the combustion liner and the flow sleeve, and an airflow guide vane disposed in the air passage. The airflow guide vane includes an upstream vane portion and a downstream vane portion. The upstream vane portion is oriented at an angle from an axial axis of the gas turbine combustor. The downstream vane portion is aligned with the axial axis. The airflow guide vane is configured to remove a circumferential swirl of an airflow upstream of the airflow guide vane to straighten the airflow downstream of the airflow guide vane along the axial axis.

A filter housing includes an inlet for receiving an airflow, a cavity for receiving a filter and an airflow passage between the inlet and the cavity. At least one vane, positioned in the airflow passage, partitions the airflow passage into a plurality of ducts. The vanes lie adjacent to, or contact, the upstream surface of the filter such that each duct communicates with a separate portion of the upstream surface of the filter. The airflow passage extends in a direction which is inclined to the upstream surface of the filter. The vanes help to distribute the flow of air more evenly across the surface of the filter and also help to reduce acoustic emissions from the machine of which the filter housing forms a part.

Provided is a wind turbine blade realizing enhancement of performance by a winglet provided at a blade tip. The wind turbine blade includes the winglet formed by bending a tip side thereof toward a pressure side of the blade relative to an adjacent portion adjacent on a blade root side, and a CANT angle defined by a blade axial line of the winglet relative to a radial extrapolation line of a blade axial line of the adjacent portion is set to be 15° or more and 55° or less. The winglet includes a tip end located on a tip side thereof, having a substantially linear blade axial line, and a bent portion located on a base end side of the winglet and bent relative to the adjacent portion. This bent portion is bent gradually so as to satisfy the predetermined CANT angle.

The invention discloses a low-noise self-priming combined pump. According to the low-noise self-priming combined pump, diffusion guide vanes and a guide disc of a traditional self-priming jet pump are removed, a single-baffle-tongue single-outlet centrifugal vortex chamber or a multi-baffle-tongue multi-outlet centrifugal vortex chamber which is higher in hydraulic performance and efficiency is adopted, a single entry type runner is designed, centrifuged and accelerated fluid is reasonably guided into a distribution pumping chamber or a distribution tee joint, scraping among the guide vanes, the guide disc and a centrifugal impeller and strong impact of the high-speed fluid to the guide vanes and the guide disc are eliminated essentially, transitional flowing between the centrifugal vortex chamber and the distribution pumping chamber or the distribution tee joint is more smooth, and the flowing losses and flowing noise are lower. Through the reasonable arrangement of the single entry type runner, continuous supply of the working fluid at the inlet section of a spray nozzle can be guaranteed, so that negative pressure is maintained, and strong self-priming capacity is obtained. The traditional large-sized distribution pumping chamber can be replaced with the distribution tee joint, and thus the structure is more compact.

The invention relates to an impeller and volute chamber guide device in a double-suction centrifugal pump. The impeller and volute chamber guide device comprises a centrifugal pump volute casing, blades, impeller guide plates, volute chamber guide plates, a front cover plate, a rear cover plate and an impeller rotary shaft. The impeller front cover plate and the rear cover plate are fixed with the impeller guide plates between the adjacent blade working surfaces and the blade back surfaces so as to guide liquid flow which just enters the impeller; the impeller guide plates are welded between the front cover plate and the rear cover plate; an included angle between each of the tail parts of the guide plates and the outer diameter of the impeller is equal to the blade outlet angle. The volute chamber guide plates are distributed on the inner wall of the centrifugal pump volute casting at different angles along an Archimedes spiral line. According to the impeller and volute chamber guide device disclosed by the invention, the pump operation efficiency can be greatly improved.

The invention relates to a cooling fan which comprises a base and a rotor arranged on the base; an air inlet and an air outlet are respectively formed at the two sides along the axial direction of the cooling fan; the rotor comprises a wheel hub and a plurality of fan blades arranged at the periphery of the wheel hub; each fan blade comprises a windward side and a leeward side opposite to the windward side; the rotor also comprises a ring-shaped wall which is arranged at the periphery of the fan blades and connected with the outer ends of the fan blades; a through hole is formed between every two adjacent fan blades on the ring-shaped wall; and the through hole is close to the rotating direction of the rotor and is arranged on the leeward side of the fan blade positioned in the front.

The invention relates to a special material regulating angle valve for a high-pressure hydrogenation reaction. A valve seat is fixed on a valve body, a valve rod is spliced in the valve body in a sealing and sliding manner, a valve core is in integrated connection with the bottom end part of the valve rod, an auxiliary guide seat is mounted between the valve body and the valve seat, an anti-erosion sleeve is mounted on the auxiliary guide seat, one end of the anti-erosion sleeve is embedded into the auxiliary guide seat, the other end of the anti-erosion sleeve is embedded into the valve body, and the valve rod is spliced in the anti-erosion sleeve in a sliding manner. With the adoption of the special material regulating angle valve, the accumulation of a medium on an inner wall is prevented, the erosion of the high speed medium to internal pieces of the valve is reduced, the valve rod is not blocked by the granular medium, the service life of the valve rod is prolonged, and the stability and reliability of the auxiliary guide seat are ensured.

The invention relates to a high-efficiency silencing water surface or underwater driving technology. An air compressor / high pressure steam generator generates high pressure gas / steam, the gas outlet of the air compressor or high pressure steam generator is connected with a high pressure gas holder in parallel, the gas inlet of the air compressor or high pressure steam generator is connected with a low pressure gas holder / condenser in parallel, the high pressure gas holder is respectively connected with a boosting gas bag and an additional water ramjet subsystem, the low pressure gas holder / condenser is connected with the boosting gas bag, and the boosting gas bag is arranged in a guide pipe. The communication between a plurality of boosting gas bags and the high pressure gas holders or the low pressure gas holder / condenser is controlled to control expansion and contraction of the gas bags, the boosting gas bag is expanded to extrude the water in the guide pipe out, so as to generate athrust and drive a ship to move; the boosting gas bag contracts and the guide pipe is filled with water to be ready for jet flow at the next time; the direction of inlet outlet water in the guide pipe can be determined by controlling the open and close of water inlet outlet valves at the two ends of the guide pipe; and the process can be repeated to drive the ship to do various movements.

The invention provides a device for reducing navigation resistance on a ship with a moon pool. The ship with the moon pool comprises a hull and the moon pool. The moon pool penetrates the hull. The device comprises a first flow guide plate and a second flow guide plate. The first flow guide plate and the second flow guide plate are fittingly arranged at a bottom opening of the moon pool and are respectively hinged to the bottom opening of the moon pool, a plurality of wing-shaped components are arranged on the first flow guide plate and the second flow guide plate along the length direction of the ship at intervals and are penetratingly arranged on the first flow guide plate and the second flow guide plate, front edges and rear edges are arranged on the wing-shaped components, each front edge of the corresponding wing-shaped component has an arc-shaped section, the section of each rear edge of the corresponding wing-shaped component is in the shape of an acute angle, each front edge and the corresponding rear edge are respectively arranged at two ends of the corresponding wing-shaped component, and the front edges face the direction of a stem of the ship. According to the technical scheme, the device has the advantages that obvious flow guide effects can be realized, vortex due to sudden change of the geometric shape of the opening of the moon pool can be reduced, and separation of water flow at the bottom of the moon pool and sloshing of water in the moon pool can be suppressed; the water in the moon pool is basically static during navigation, and accordingly the purpose of reducing the navigation resistance can be achieved.

Flowmeters are disclosed herein that include one or more flow path features for improving the measurement accuracy or other aspects of the flowmeter. In some embodiments, the flowmeter includes a measurement section having a non-circular transverse cross-section in which one or more sensors for measuring flow are disposed. The non-circular measurement section can reduce distortion of ultrasonic waves, facilitate chordal measurements with flush-mounted transducers, and reduce the propagation distance between paired transducers. In some embodiments, the flowmeter includes a conditioning section with diametrically opposed longitudinal rib protrusions. The protrusions can reduce swirling flow, direct liquid components of a multi-phase flow towards the sidewalls of the flow path, and guide ballistic particles through the center of the flow path away from sensitive measurement devices.

Disclosed is a burner for particulate fuel, in particular made of biomass, with a primary tube and a core tube arranged in the primary tube. The primary tube and the core tube form a primary tube gap and the primary tube gap is configured to guide a flow of particulate fuel and gaseous combustion means from an inlet-side end to an outlet-side opening of the primary tube. In order to prevent the drawbacks occurring when using coarse-grain particles, preferably biomass, as a fuel for dust firing, or at least to reduce them without having to accept an increased outlay for equipment and / or additional energy losses, at least one device is provided for centring the flow within the primary tube in the region of the outlet-side end of the primary tube.

The invention discloses a vehicle-mounted laser PM2.5 sensor. The vehicle-mounted laser PM2.5 sensor comprises a shell, an air inlet and an air outlet are formed in the shell and are respectively located on the opposite two side walls of the shell, an air induction fan is arranged in the air outlet, an air induction interface is arranged in the air inlet, an air induction pipe connector is arranged on the air induction interface, an air exhaust interface is arranged in the air outlet, and an air exhaust pipe connector is arranged on the air exhaust interface. The air induction interface, the air exhaust interface and the internally arranged air induction fan are arranged, so that the air in or outside a vehicle is introduced into the inner part of the sensor, the concentration of dust in the air is then detected through laser, then the air is exhausted into or outside the vehicle through the fan, the air exhaust interface and an externally arranged air exhaust pipeline, air induction equipment is not additionally added, an external connection pipeline is adopted, and the vehicle-mounted laser PM2.5 sensor is not limited by the installation position, is good in airtightness, is notaffected by external air speed, and is strong in anti-jamming capability and high in detection accuracy, and the detection result is reliable.

Flowmeters are disclosed herein that include one or more flow path features for improving the measurement accuracy or other aspects of the flowmeter. In some embodiments, the flowmeter includes a measurement section having a non-circular transverse cross-section in which one or more sensors for measuring flow are disposed. The non-circular measurement section can reduce distortion of ultrasonic waves, facilitate chordal measurements with flush-mounted transducers, and reduce the propagation distance between paired transducers. In some embodiments, the flowmeter includes a conditioning section with diametrically opposed longitudinal rib protrusions. The protrusions can reduce swirling flow, direct liquid components of a multi-phase flow towards the sidewalls of the flow path, and guide ballistic particles through the center of the flow path away from sensitive measurement devices.

The present invention relates to an inhaler device for delivering a dose of medicament in dry powder form from a container to a patient in need thereof. The inhaler comprises a swirl chamber in which particles of the medicament entrained in an airflow swirl upon inhalation thereby breaking up the agglomerates into finest dispersed powder.

The invention relates to a novel pumping station water pump beam anti-vortex device and method, belonging to the technical fields of hydraulic engineering and municipal engineering. The novel pumping station water pump beam anti-vortex device comprises a water pump beam arranged in a water inlet tank. The novel pumping station water pump beam anti-vortex device is characterized in that the water pump beam is composed of a front water pump beam and a back water pump beam which are respectively arranged on both sides of a water outlet bent pipe in the water inlet tank; the front water pump beam is faced with the water inlet side of the water inlet tank; the upstream face of the front water pump beam is a streamlined section connected with double semicircular arcs; the upstream side of the front water pump beam is streamlined without rectangular edges; the cross section of the back water pump beam is a semicircular arc; and the side face of the back water pump beam adjacent to the water inlet tank is cambered. The novel water pump beam can effectively improve the flow state in the water inlet tank, reduces the occurrence of the reflux on the back wall of the water inlet tank and performs a flow regulation function. Meanwhile, the device can reduce the occurrence of the vortex around the water pump beam, thereby avoiding forming the vortex strip. The device and method are used for constructing and reconstructing a pumping station, can effectively enhance the operating efficiency of the pumping station, and improve the cavitation property of the pump unit.

The invention discloses a variable-working-condition gas boosting system and a boosting method thereof. The variable-working-condition gas boosting system includes a gas intake and exhaust pipeline, two high-pressure water and gas tanks, a pump unit pipeline, a water inlet and drainage pipeline and a spray circuit. The gas intake and exhaust pipeline is used for controlling gas intake and exhaustof the high-pressure water and gas tanks, the high-pressure water and gas tanks are used for gas boosting, and the pump unit pipeline is used for connecting the two high-pressure water and gas tanks to enable circuits of the high-pressure water and gas tanks to flow. The spray circuit is used for spray cooling in the high-pressure water and gas tanks. The variable-working-condition gas boosting system replaces a traditional supercharger by using the incompressibility and high heat capacity of water and the compressibility of air based on the principle of pumping compressed air, so that the problem of gas heating during the use of the traditional supercharger is solved, the loss of heat is reduced, and the irreversible loss in the compression process is reduced. Electric valves are controlled by using electrical signals such as a liquid level sensor, it is beneficial to optimize control, and system response is improved.

The invention provides a method for designing a multi-section mixed valve element of a regulating valve. The method comprises the steps: (1) obtaining the flow of the valve element under different opening and the flow area under the corresponding opening by calculation; (2) calculating the flow area needed by equal percentage flow characteristics under different opening; (3) obtaining circle diameters corresponding to all sections; (4) completing the outer contour of the multi-section mixed valve element; (5) determining the opening needing to be optimized; and (6) obtaining the improved valveelement structure. The method has the following advantages that the degree of change of the flow area formed between the profile of the multi-section mixed valve element and a valve hole has higher regulation precision relative to the gentle change of a flat valve element, and the regulating characteristic is close to the regulating characteristic of the equal percentage flow characteristics; theregulating valve with the multi-section mixed valve element is opened at different angles, gas flows through the profile of the multi-section mixed valve element, airflow is smooth, the formed vortexis less, and the energy utilization of exhaust gas of the downstream turbines of a two-stage supercharging system is advantageously improved.

Flowmeters are disclosed herein that include one or more flow path features for improving the measurement accuracy or other aspects of the flowmeter. A flowmeter can include an elongate body having a first end and a second end and a flow path extending between the first and second ends along a longitudinal axis. An ultrasonic transducer can be disposed in a measurement section of the flow path and configured to emit ultrasonic waves into a material flowing through the flow path. First and second protrusions can be formed in a conditioning section of the flow path upstream from the measurement section, the first and second protrusions extending radially inward from a sidewall of the flow path and being configured to reduce swirling flow through the measurement section.

The invention relates to a multi-functional liquid filling system, and is suitable for places where liquid materials need to be accurately filled. The multi-functional liquid filling system comprises a liquid pipeline system and a computer control system. The multi-functional liquid filling system is characterized in that the liquid pipeline system comprises a liquid storing tank, a standby liquid storing tank, a storing tank of a liquid transporting vehicle, a pump body, a filling device, a filling measurement pipeline, a liquid supplement measurement pipeline and a liquid drainage measurement pipeline. The multi-functional liquid filling system disclosed by the invention integrates a function of accurately filling of liquid, a function of self liquid supplement measurement of the liquid storing tank, and a function of self liquid drainage measurement of the liquid transporting vehicle.

The invention discloses a steam and water mixing heater which is a novel heating device for directly mixing steam and water (or other liquids) and belongs to the field of heat exchange. The steam and water mixing heater has the benefits a follows: a damping spring is additionally arranged between a laval nozzle and a casing, so that oscillation of the laval nozzle, which is generated when steam and cold water are mixed, can enable the oscillation of the casing to be reduced through buffering action of the damping spring; the central axis of a steam inlet is shifted a certain distance from the central axis of the laval nozzle, so that the steam is prevented from directly impacting the laval nozzle after entering; the steam generates swirlflow inside, so that oscillation to the equipment is reduced; and the swirling steam enters the laval nozzle through heating holes, so that the mixing of the steam and the cold water is strengthened, and further, the steam and the water can be uniformly mixed in a shorter time.

The invention discloses a re-improved L-shaped pitot tube for measuring flow velocity of fluid. According to the re-improved L-shaped pitot tube, the semispherical, semielliptical spherical or cone frustum-shaped section of the measuring head, which is used for measuring the total pressure, of the conventional L-shaped pitot tube is changed to be a section of small straight pipe, and a section of conical tube with a small taper angle or both a conical tube and an elliptic conical tube is / are connected between the small straight pipe and the small straight pipe of the pitot tube for transition. According to the invention, since the area of the measuring head is greatly reduced, and vortexes formed in front of the measuring opening can be reduced, so that the total pressure is measured more accurately, and higher flow velocity can be measured; since the measuring head becomes smaller, the conical tube with the small taper angle is adopted for transition, and fluid outside the tube is more stable, static pressure is measured more accurately; since the external diameter of the pitot tube is extremely small, and interference to the state of fluid in a measured tube is reduced, smaller air ducts can be measured, and the measurement range is enlarged.

A steam turbine is provided. The steam turbine includes a housing and a steam inlet configured to discharge a primary steam flow within the housing. A stator is coupled to the housing and a rotor is coupled to the housing and located within the stator. The rotor and the stator are configured to define a primary flow path there between and in flow communication with the primary steam flow. The steam turbine includes a seal assembly coupled to the housing. The seal assembly includes a packing head and a plurality of seals. The packing head is configured to define a cooling flow path in flow communication with the rotor and configured to discharge a cooling steam flow toward the rotor. An anti-swirl device is coupled to the seal assembly and located between the rotor and the packing head.

The invention discloses a stable combustion combustor based on pre-combustion chamber temperature control and an operation method thereof. A primary air rotational flow device of the stable combustioncombustor is arranged at an inlet of a pre-combustion chamber, so that a wind-powder mixture generates strong rotational flow before entering the pre-combustion chamber to be combusted, and the low-load stable-combustion performance of the combustor is ensured. A direct-current center air duct is arranged at an inlet of the pre-combustion chamber, and the phenomena of coking, burning loss and thelike of the pre-combustion chamber under high loads can be avoided by adjusting the opening degree of direct-current center air. Secondary air with adjustable rotational flow intensity is arranged onthe outer side of a cavity of the pre-combustion chamber, mixing of the secondary air and air powder flow in the pre-combustion chamber is delayed, generation of nitric oxide is reduced, and meanwhile the low-load stable combustion performance and the coking and burning loss prevention performance of the combustor can be improved in an auxiliary mode by adjusting the rotational flow intensity ofthe secondary air. The deep peak regulation capacity of a coal-fired boiler can be effectively improved, and the coal quality adaptability of a deep peak regulation unit is broadened.

The invention discloses a lateral inlet pump station model test rectification method. The method comprises the steps of 1: setting lateral inlet pump station forebay regulation measures; 2: building aphysical model according to a set scheme; 3: building a mathematic model according to the set scheme and performing calculation; 4: performing comparative analysis on a physical model calculation result and a mathematic model calculation result; and 5: comprehensively analyzing a scheme calculation result to obtain an optimal lateral pump station forebay regulation scheme. The improvement of a water inlet flow condition of a pump station can effectively improve the running performance of a water pump, reduce the sediment accumulation, improve the running reliability and economy of the pump station, reduce the cost and increase the benefits.

According to exemplary embodiments, a rotor off-take assembly is provided by positioning an angled hole or aperture in a stator assembly. This angled hole provides improved pressure recovery and utilizes higher dynamic pressure to drive the bleed air flow into the off-take cavity.