34 results about "Main injector" patented technology

A combustor includes outer and inner liners joined together by a dome to define a combustion chamber. A row of air swirlers is mounted in the dome and includes corresponding main fuel injectors for producing corresponding fuel and air mixtures. Pilot fuel injectors fewer in number than the main injectors are mounted in the dome between corresponding ones of the swirlers. Staged fuel injection from the pilot and main injectors is used for starting the combustor during operation.

A steam jet refrigeration cycle system comprises a producer, an evaporator, a condenser, a circulation pump, a throttle valve and main and secondary injectors. The producer is used for producing the high-pressure refrigerant working steam. The main injector is used for jetting the low-pressure refrigerant steam coming from the evaporator and the secondary injector is used for jetting the low-pressure refrigerant steam coming from the main injector. The circulating pump outputs the high-pressure refrigerant liquid. The refrigerant liquid coming from one outlet of a diffuser returns to the producer and the refrigerant gas-liquid mixture coming from the other outlet enters to the condenser to condense. The produced refrigerant liquid is divided into two ways, one way is sent to the secondary injector by the circulating pump and the other enters to the evaporator through the throttle valve. The refrigeration is realized by evaporative heat-absorbing of the refrigerant in the evaporator.

A fuel system for a gas turbine engine, the gas turbine engine including a combustor having a pilot fuel injector and a main fuel injector, the fuel system including first and second variable flow fuel pumps configured to provide metered fuel flow to the pilot injector, and the main injector respectively; first and second variable speed electric motors configured to drive respective first and second fuel pumps; wherein each of the electric motors includes a polyphase motor including a stator having concentrated windings.

An injector of a two-headed combustion chamber of a turbomachine has a first feed tube which is connected to an annular injection piece for discharging primary fuel into the combustion chamber. It also has a second feed tube surrounding the first feed tube and connected to a cylindrical endpiece for discharging secondary fuel into said combustion chamber. This endpiece has an annular channel of diameter that is greater than the diameter of the second feed tube and that extends over its entire length. A third tube is provided that surrounds the second tube and that is connected to a tubular separation element which is inserted in the annular channel of the cylindrical endpiece so as to form two annular spaces in which a cooling fluid can flow over 360° all the way to the end of the injector.

The invention relates to a device for ventilating a high pressure turbine rotor which comprises a turbine disk and an upstream end plate. A first circuit for cooling blades delivers a first air flow via main injectors and holes formed in the end plate. A second cooling circuit delivers a second air flow through a discharge baffle situated downstream from the compressor, a fraction of this second flow serving to cool the upstream top face of the end plate through a second baffle situated beneath the main injectors. A branch connection is provided between the first circuit and the enclosure situated downstream from the second baffle and it delivers a third flow which is set into pre-rotation by additional injector means formed in the form of inclined bores.

Method and device (1) for supplying fuel to a combustion chamber that includes at least one main injector (3) and at least one pilot injector (2). The device includes a fuel tank (4), a line system (5) coupled from the fuel tank to the injectors (2, 3), a pump (6) for pumping fuel from the tank to the injectors, and a first regulator valve (7) for regulating the flow of fuel in a first line (8) in the system which is connected to the pilot injector (2). The device further includes a second regulator valve (9) for regulating the flow of fuel through a second line (10) in the system, which is connected to the pilot injector (2). The second regulator valve (9) is designed to regulate a substantially smaller flow than the first regulator valve (7).

The invention discloses a tail gas waste heat driving injection refrigeration system for a vehicle air conditioner for replacing a traditional steam compression refrigeration system for the vehicle air conditioner. The system consists of a tail gas heat exchanger, a generator, a main injector, an auxiliary injector, an evaporator, a condenser, a flash tank, an expansion valve, an electric three-way adjusting valve and an electromagnetic valve. The system has the following advantages: (1) the traditional steam compression refrigeration system for the vehicle air conditioner is replaced; and the performance reduction and the energy consumption rise of an engine caused by driving of a compressor are prevented; (2) the vehicle tail gas waste heat is reasonably used, and the exhaust temperature of tail gas is reduced, so that the activity of a catalyst in a catalytic converter is improved, and the environmental heat pollution and the harmful gas emission are reduced; (3) the system has no moving parts, needs no lubricating oil, is simple, and is reliable in work; and (4) the system uses water as a refrigerant, and totally has no harm to human bodies and environments.

A fuel supply device for an internal combustion engine including a throttle valve and an airbox is provided with a main injector disposed at a downstream side of the throttle valve, an auxiliary injector disposed at an upstream side of the throttle valve and in the airbox, and a delivery pipe disposed inside the airbox and adopted to supply and distribute a fuel to the auxiliary injector. The delivery pipe has both ends which are supported on two side walls of the airbox.

The invention discloses an automatic nucleic acid extracting device applicable to space. The device comprises a translation table, a stepping motor, a limiting switch, an injector set, a silicon rubber tube, a pressing pipe valve, electromagnets and a control circuit. The injector set is formed by fixedly connecting five 1 ml injectors for storing reagents needed by nucleic acid extraction; the injectors are fixed to the translation table, the translation table is driven by the stepping motor and can push and pull pistons of the injectors; the limiting switch is located at the end of the stroke of the pistons of the injectors and used for feeding back the position of the motor; the injectors are connected together through the silicon rubber tube, and the pressing pipe valve is used for controlling on-off of the silicon rubber tube; the two electromagnets are located at the two sides of the main injector for generating an oscillation magnetic field. The full-automatic extracting processfrom samples to purified nucleic acid inside a liquid closed system is achieved, no risk of aerosol contaminations is caused, the device can be used for automatically extracting nucleic acid of biological samples under the micro-gravity environment, and integration with a follow-up nucleic acid processing module is facilitated.

A method is described for the controlled purging of the fuel feeding system in the combustor of a gas turbine comprising at least one compressor (10), capable of compressing the air introduced into it through an inlet duct (12), at least one combustor (14), in which said compressed air is mixed and combusted with a gaseous fuel coming from a feeding duct (16), and at least one turbine (20), capable of transforming the energy of the combusted gas coming from said combustion chamber (14) into work energy which can be exploited for activating one or more operating machines (22). The combustor (14) is equipped with one or more burners (30), each equipped with at least one pilot injector (36) and one or more main injectors (38) for the adduction of the gaseous fuel inside the burner (30). The method comprises purging at least part of the main injectors (38) and relative manifolds (34) with a stream of gaseous fuel when the turbine is in diffusive flame functioning mode and purging the pilot injector (36) and relative manifold (32) with a stream of gaseous fuel when the turbine is in premixed flame functioning mode.

A fuel system for a turbine engine for improving efficiency in a fuel system where a major stage and secondary stage can be combined and held to a relatively constant fuel ratio while maintaining acceptable engine dynamics and NOx emissions is disclosed. The fuel system may be formed from a first premix injector assembly stage positioned upstream from a combustor basket, whereby the first premix injector assembly stage is a secondary injector system. The fuel system may be formed from a first primary injector assembly stage, which is a main injector system, positioned downstream from the first premix injector assembly stage. The first premix injector assembly stage and the first primary injector assembly stage may be coupled together such that the fuel system is capable of emitting fuel into a combustor of the turbine engine via the first premix injector assembly stage and the first primary injector assembly stage simultaneously.

The invention provides an ignition system and a vehicle for a methanol engine and relates to the field of methanol engines. The ignition system includes a main combustion chamber and a pre-combustionchamber, wherein an intake valve is arranged in the main combustion chamber, and the intake valve communicates with a main injector for injecting a lean mixture having a first predetermined concentration into the main combustion chamber; the pre-combustion chamber communicates with the main combustion chamber through a pre-combustion chamber nozzle, and a spark plug electrode and a pre-injection nozzle are arranged in the pre-combustion chamber; and the spark plug is arranged in a methanol pre-combustion chamber. Due to the high concentration of the rich mixture gas, the requirement for minimum ignition energy of the spark plug is reduced. By igniting the concentrated methanol mixture gas in the pre-combustion chamber, the concentrated mixed methanol flame is injected into the main combustion chamber, the lean mixture gas of methanol in the main combustion chamber is combusted, and the ignition energy is greatly increased. By using of the system, the combustion temperatures and enginethermal loads are reduced while engine NOX emission is reduced and engine thermal efficiency is improved.

The invention relates to a liquid medicine mixing sprayer which comprises injectors, a tee joint and a mixing spray head, wherein the front parts of the main injector and the auxiliary injector are connected with the mixing spray head through the tee joint, and the rear parts of core rods of the injectors are provided with a synchronizing pushing handle. A mixing cavity of the mixing sprayed head is internally provided with a spray core column, and the port of the spray core column is provided with an atomization sheet which is buckled on the spray core column. A growth factor product and coagulant are respectively stored in the main injector and the auxiliary injector, enter the mixing spray head according to the proportion, and are sprayed out by the atomization sheet. The invention is convenient for mixing the medicine, shortens the mixing time of the growth factor product and the coagulant, avoids the flocculation, and can make the liquid medicine be uniformly sprayed on wound in a vapourous state. The invention has simple structure, convenient operation and use, high working efficiency and good safety performance.

The invention belongs to the technical field of a chemical teaching tool, and particularly relates to a reaction integrated device for experiment. The reaction integrated device for experiment comprises a first injection device and a second injection device; the first injection device and the second injection device comprise main injectors, and first assistant injectors and second assistant injectors which are linked to the main injector; the first assistant injectors and second assistant injectors are connected through a U-shaped pipe. The experiment step is simplified and the preparation time before class is shortened; the injectors are used as generation and collection devices for preparing carbon dioxide, and the prepared carbon dioxide gas can be used immediately. The device can carryout the experiment of reaction between carbon dioxide and sodium hydroxide solution, and is composed of a part of components of 50 ml and 5 ml injectors and infusion apparatuses; the reaction integrated device is small and light, convenient to carry, simple in operation, strong in repeatability, and can be prepared to be a complete set device, and used for a long term.

The invention discloses a young bird automatic injection immunizing machine, which comprises a machine body, a machine cover and a control cabinet, wherein vaccine bottles are arranged on a vaccine bottle bracket which is arranged at one side of the machine body; the vaccine bottles and injectors are connected by virtue of infusion tubes; the injectors are arranged at the other side of the machine body; the injectors include a main injector and a subordinate injector; and the subordinate injector is connected to the main injector by connecting a rapid connecting tube to a tee valve. The invention also discloses a young bird automatic injection immunizing method. The young bird automatic injection immunizing method is high in efficiency of automatically injecting immune vaccines, namely 4000-6000 birds/h or above, which is about 5 times as much as that of manual vaccine injection; the immunizing machine is precise in immunizing dosage control and capable of saving the usage amount of vaccines; and meanwhile, the immunizing machine is operated by a single person, so that labor cost is saved.