480 results about "Feed pressure" patented technology

A method and apparatus for managing temperature and pressure of fuel in a fuel tank stored at or near its vapor pressure. In response to fuel feed pressure, a variable ratio of liquid fuel to fuel vapor is extracted from the fuel tank in order to regulate temperature and pressure of the fuel for the purpose of keeping the pressure lower in anticipation of refilling or to assist a vaporizer of the fuel system which is incompletely vaporizing the fuel.

The invention discloses iron-based amorphous alloy powder capable of forming an amorphous alloy coating, and a method for preparing an amorphous coating. The amorphous alloy powder is taken as a raw material, and a complete amorphous coating is prepared by a cold spray method. The alloy powder mainly comprises Fe, Cr and Mo, can contain one or more of Ni, Co, Mn, Si, Re, Al, Cu, Nb, Zr, Ti, C, B and other elements, wherein Fe, Cr and Mo account for over 70 atomic percent of the alloy. The component has a wide supercooled liquid region and high amorphous forming capacity, amorphous powder can be obtained by an atomization powdering technology. In the process of preparing the amorphous alloy coating by the cold spray method, an inert gas such as nitrogen, helium and the like or a mixed gas of the nitrogen and helium is taken as a powder feeding gas and a powder accelerating gas, the temperature T of the inert gas is less than 700DEG C, and the powder feeding pressure P is 1-6MPa. The coating has a great application prospect in the fields such as wear resistance, corrosion resistance, radiation protection and the like.

An engine ECU executes a program including the step of detecting an engine speed NE and an engine load, the step of determining whether fuel can be injected at normal feed pressure from an in-cylinder injector during idling, the step of detecting or estimating a fuel temperature T in a high-pressure delivery pipe, the step of stopping the high-pressure fuel pump and injecting fuel from the in-cylinder injector at the normal feed pressure when the fuel temperature T is not greater than T(0), the step of stopping the high-pressure fuel pump and injecting fuel at the pressure greater than the normal feed pressure when the fuel temperature T is greater than T(0) and not greater than T(1), and the step of driving the high-pressure fuel pump to inject the fuel at high pressure when the fuel temperature T is greater than T(1).

In a fuel supply apparatus for an internal combustion engine, fuel is delivered to a high pressure fuel pump driven by an internal combustion engine, using an electrically-operated low pressure fuel pump, and the fuel pressurized by the high pressure fuel pump is supplied to the internal combustion engine. The fuel supply apparatus includes a low pressure pump control portion that controls the low pressure fuel pump to avoid a discharge failure in the high pressure fuel pump due to insufficiency of a feed pressure at which the low pressure fuel pump delivers the fuel to the high pressure fuel pump. The low pressure pump control portion stops the low pressure fuel pump in a case where the discharge failure in the high pressure fuel pump is avoided even when the feed pressure is equal to a gauge pressure of 0.

A hand held stamp dispenser and applicator that feeds pressure sensitive stamps (self-sticking stamps on a backing tape) from a roll. The hand held stamp dispenser and applicator incrementally indexes each stamp by depressing and releasing a manually operated lever press pad. When the lever press pad is depressed three things occur with each press or squeeze that has effect on the dispensing and the application. First, a gear is rotated turning a mandrel to draw the stamp string through a feed channel, thereby, incrementally dispensing a stamp and automatically pealing off the backing tape and exposing the pressure sensitive adhesive. Second, prior to reaching the bottom of the press pad stop point, a latching pawl drops into a gear cog to prevent reversing of the gear and mandrel. Third, a brake pad coupled to the lever press pad bottoms out and presses on the stamp and backing tape in a feed channel locking the stamp string in place so that the stamp can be applied or taken without pulling on the roll of stamps.

A closed automatic fluid mixing apparatus and method for mixing two fluids while maintaining a feed pressure of the mixed fluid at a predetermined level are disclosed. The apparatus comprises a first fluid feed, a second fluid feed, a mixing valve, and a closed control system. The mixing valve is capable of mixing a first fluid received from the first fluid feed and a second fluid received from the second fluid feed to produce a mixed fluid. The closed control system is capable of controlling the mixing valve to determine the ratio of the first and second fluids in the mixed fluid while maintaining the pressure of the mixed fluid at a predetermined level. The method comprises feeding a first fluid and a second fluid to a mixing valve; mixing the first and second fluids therein; and controlling the mixing valve's actuation of to determine the ratio of the first and second fluids in a resultant mixed fluid while maintaining the pressure of the mixed fluid at a predetermined level.

The invention discloses a control method for a delayed coking furnace, comprising: measuring a steam injection quantity, a feeding quantity and a feeding pressure; judging whether the injection quantity has sudden increase abnormal working condition, according to the measured steam injection quantity, feeding quantity and feeding pressure; measuring the temperatures of a hearth and a tube wall, if the sudden increase abnormal working condition occurs; determining an objective fuel quantity, according to the hearth temperature, the feeding quantity and the tube wall temperature; and adjusting the fuel quantity of the delayed coking furnace to the objective fuel quantity. By a state feedback prediction control scheme of real states, the anti-interference ability is effectively improved. Directed at the process characteristic change caused by load change and coking, the variation of a working point is judged on line, model self-adaptation is carried out, and the rate of putting into operation is increased. Directed at great inverse response of an outlet temperature caused by sudden increase of steam injection quantity, expert control is performed based on heat balance calculation, which can effectively prevent the outlet temperature from exceeding, and improving the operation cycle of devices.

An mechanical power system is provided for providing torque without using a heat engine in virtually any non-aviation application where fossil-fuel engines have conventionally been used, by simply replacing the fossil-fuel burning engine with a rotary pneumatic motor of appropriate size for the application and feeding pressure-regulated compressed gas to the rotary pneumatic motor. The rotary pneumatic motor can be used virtually anywhere, and requires merely a supply of compressed gas to run it, preferably compressed nitrogen. Automotive, marine and electrical generating applications are easily adaptable, and auxiliary fossil-fuel engines can be added for emergencies where a supply of compressed gas has been exhausted. A screw-type compressor can be electrically powered to supply compressed gas to the pneumatic motor where tanks of compressed gas have been exhausted. Tanks of compressed gas are to be conveniently user replaceable.

A treatment method for biodiesel waste water is carried out by the following steps: arranging self-clearing gratings at water pipe network end points under production equipment, and pumping waste water flowing across the gratings into a multi-stage oil separator; pumping the waste water in the water layer of the oil separator into an electrolytic tank; pumping the waste water from which oil is separated and removed through electrolysis into a micro-electrolysis reaction tank to carry out micro-electrolysis treatment; pumping the micro-electrolyzed waste water into a Fenton system to carry out reaction; feeding the waste water treated by multiple steps into a biochemical system; removing SS from discharged water by efficient shallow gas flotation micro-flocculation; sequentially filtering the waste water purified by micro-flocculation by a sand filter, active carbon and an ultra-filtration system; pumping various sludge produced in the waste water treatment process into a sludge concentration tank. The method has the advantages that oil is fully separated from the waste water, and no impurities are left; massive COD and PH are removed, the water feeding pressure of the biochemical system is reduced, waste water toxicity is reduced, biodegradability is improved, waste water color and smell are removed, and the quality of finally discharged clear water reaches domestic first-grade emission standards.

A composite electrode adapted for use in a flow battery stack system has a carbon felt stratum forming a semi-porous reaction zone and a carbon foam stratum forming a porous flow path zone. The composite electrode is less compressible than prior art electrodes having similar conductivity and specific surface areas. Flow battery stack systems employing the composite electrode operate with lower feed pressures, experiences a lower pressure drops across the electrodes, and realize improved electrical resistivity. Alternative embodiments provide electrical conductive elements and a current collector disposed on a surface of the composite electrode.

The invention provides an ore grinding granularity online prediction system and method, and relates to the technical field of ore grinding. The ore grinding granularity real-time online prediction system receives ore feeding amount, grinder concentration, classifier overflow concentration, pump pool concentration and swirler ore feeding pressure which are output by an ore grinding loop control device; ore grinding granularity is online predicted; an ore grinding granularity optimal setting control device receives an ore grinding granularity prediction result and sends control signals of the new ore feeding amount, the new grinder concentration, the new classifier overflow concentration, the new pump pool concentration and the new swirler ore feeding pressure; the ore grinding loop control device conducts closed-loop control. Through the solution of an online ore grinding granularity prediction mechanism model, response speed of ore grinding granularity prediction is improved on the premise that calculation accuracy of the model is not reduced, and the real-time performance of prediction is improved. The ore grinding granularity online prediction system and method are used for online estimating ore grinding granularity indexes, and closed-loop control of the ore grinding granularity is achieved. The change of the ore grinding granularity in a period in future can be predicted according to fluctuation change of other production factors, and therefore real-time optimization of the ore grinding granularity is achieved.

An mechanical power system provides torque without using a heat engine where fossil-fuel engines have conventionally been used, by replacing the fossil-fuel burning engine with a rotary pneumatic motor and feeding pressure-regulated compressed gas to the rotary pneumatic motor. The rotary pneumatic motor can be used anywhere, and requires preferably compressed nitrogen in a non-liquid state. Automotive, marine and electrical generating applications are adaptable, and auxiliary power is available for emergencies where a supply of compressed gas has been exhausted. A screw-type compressor can be electrically powered to supply compressed gas to the pneumatic motor where tanks of compressed gas have been exhausted. An electrical generating power plant includes an array of solar panels for generating direct current (DC) and a DC/AC converter for converting the DC to alternating current (AC) and outputting a portion of the AC via a power plant output port to supply an AC load.

A testing chip that analyzes a specimen includes: a reagent storage section; a mixing and reaction flow channel to perform a series of operations to mix a specimen and aqueous reagent, make the specimen and reagent react with each other, and detect the reaction; and a liquid feed control section provided between an outlet flow channel of the reagent storage section and the inlet of the mixing and reaction flow channel. Herein, aqueous reagent, lipophilic liquid, and aqueous liquid having greater surface tension than that of the aqueous reagent are disposed in the reagent storage section in this order toward the outlet flow channel, the aqueous liquid being stored in contact with the liquid feed control section; and aqueous liquid passes the micro flow path of the liquid feed control section by applying a liquid feed pressure higher than or equal to a predetermined pressure to the reagent storage section.

The invention discloses a feeding pressure and pressing pressure linkage type pressure filter control method and a high-pressure pressure filter. The control method is characterized by comprising the following steps of: before feeding, applying a pressing pre-pressure to the pressure filter, so as to keep a sealing state of a filter board when a filter chamber of the pressure filter is empty; and starting feeding, so that a feeding pressure inside the filter chamber is continuously increased when a material is continuously filled into the filter chamber of the pressure filter, and the pressing pressure applied to the pressure filter is correspondingly increased according to a certain ratio. Compared with the prior art, the feeding pressure and pressing pressure linkage type pressure filter control method provided by the invention has the following advantages and effects of being simple to control and easy to realize; the feeding pressure of the pressure filter is greatly improved, so that the capability of separating filtrate by the material in the filter chamber is improved; and the control reaction is rapid, and the efficiency is high.

The invention relates to devices, systems, and methods for automatic feed adjustment during welding operations using a pressure measuring device and a welding wire knowledge database to adjust tension between at least one pair of wire feed rolls, at least one of which is a drive roll.

The invention discloses a sewage sludge reduction dewatering method which is based on a reduction dewaterer. The reduction dewaterer comprises at least one dewatering module, wherein each dewatering module comprises a two-way cylinder (1) and two symmetrically arranged dewatering units (2); each dewatering unit (2) comprises a dewatering shell (2.1), a supporting plate (2.2) and an extrusion plate (2.3); the supporting plate (2.2) is positioned on the outer side of the dewatering shell (2.1); the extrusion plate (2.3) is positioned on the inner side of the dewatering shell (2.1); the dewatering shell (2.1) is provided with a feed port (2.4); the two-way cylinder (1) is provided with two piston rods (1.1); and the two piston rods (1.1) are respectively connected with the extrusion plates (2.3) of the two dewatering units (2). The feed dewatering and extrusion dewatering are carried out at the same time, thereby enhancing the work efficiency. Meanwhile, the feed pressure is ingeniously used for dewatering in the extrusion dewatering process, thereby enhancing the power use effect.

A gas turbine engine component, especially an aerofoil-sectioned nozzle guide vane (NGV), having at least one internal cooling chamber for passage of cooling air, the chamber including leading edge portion and one inlet portion via which cooling air may enter the chamber from feed source, wherein the component includes a partitioning element, e.g. curved or scoop-shaped partitioning plate or wall, provided in the chamber inlet portion and defining within the inlet portion a sub-chamber adjacent the leading edge portion, and wherein partitioning element is configured so the cooling air velocity in the sub-chamber is less than the cooling air velocity in the remainder of inlet portion. The reduced velocity of the cooling air in the sub-chamber adjacent the leading edge serves to increase pressure therein, thereby maintaining desired backflow pressure margin between the feed pressure of the cooling air delivered to the showerhead holes and the gas-path from the combustor.

The invention relates to a printing head for melting a sedimentation-type rapid molding device. The printing head comprises a printing nozzle, a heater and a feeding device, wherein a discharge hole of the feeding device is communicated with a feed hole of the heater; the printing nozzle is mounted on a printing vehicle of a three-dimensional printing machine; the heater is mounted on a stander of the three-dimensional printing machine; the discharge hole of the heater is communicated with the feed hole of the printing nozzle through a hose, so that molding materials in a molten state in a heating melting chamber of the heater are conveyed into the printing nozzle through the high-temperature-resistant hose; a feeding pressure device is used for supplying feeding pressure to the heating melting chamber of the heater. By adopting the printing head, vibration of the printing nozzle of the printing head during printing is reduced and the quality of the printer is improved. Besides, the invention also provides the three-dimensional printing machine comprising the printing head.

A composite membrane comprising a discriminating layer and a porous support layer for the discriminating layer, CHARACTERISED IN THAT the discriminating layer comprises at least 60 wt % of oxyethylene groups and the porous support layer has a CO₂ gas flux of 5 to 150×10⁻⁵ m³ (STP)/m²·s·kPa at a feed pressure of 2.07 kPa. The membranes are particularly useful for purifying waste gas streams e.g. by removing greenhouse gases.