SU885716A1

SU885716A1 - Method of controlling injection nozzle operation

Info

Publication number: SU885716A1
Application number: SU802877553A
Authority: SU
Inventors: Анатолий Артемович Томашев
Priority date: 1980-01-25
Filing date: 1980-01-25
Publication date: 1981-11-30

Description

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Шобретение относитс к теплоэнергетике и может быть использовано в автоматах и системах розжига газо-мазутных горелок котлоагрегатов .The invention relates to heat and power engineering and can be used in automatic machines and ignition systems for gas-oil burners of boiler units.

Известен способ управлени режимом работы форсунки, снабженной запальником, путем открыти клапана подачи топлива в форсунку по командному сигналу, характеризующему термическое состо ние запальника.There is a known method for controlling the operation mode of an injector equipped with a pilot by opening the fuel supply valve to the injector according to a command signal characterizing the thermal state of the pilot.

В качестве командного сигнала в известном способе используют сигнал о наличии факела запальника 1.As a command signal in a known method using the signal of the presence of the flare pilot 1.

Недостатком известного способа вл ютс сложность контрол факела. .The disadvantage of this method is the difficulty of controlling the torch. .

Цель изобретени - повышение надежности при использовании запальника электротермического типа, подключенного к цепи питани .The purpose of the invention is to increase reliability when using an electrothermal type igniter connected to a power circuit.

Поставленна цель достигаетс тем, что в цепи питани измер ют величину тока и после време1шой задержки используют ее в качестве командного сигнала, характеризующего термическое состо ние запальника.This goal is achieved by measuring the current in the power supply circuit and, after a time delay, using it as a command signal characterizing the thermal state of the igniter.

На фиг. 1 приведена схема управлени , реализующа предлагаемый способ; на фиг.2структурна схема устройства управлени форсункой.FIG. 1 shows a control circuit implementing the proposed method; 2 shows a structure diagram of an injector control device.

Схема управлени (фиг. 1) включает в себ силовой трансформатор (СТ), питающий электротермический запальник (ЗЭТ), включен1а ш в цепь вторичной обмотки этого трансформатора последовательно с трансформатором тока (ТТ), выход которого подключен к реле тока (РТ), контакт реле тока (РТ) включен в цепь запуска импульсного реле The control circuit (Fig. 1) includes a power transformer (ST) supplying an electrothermal ignitor (ETH), is connected to the secondary circuit of this transformer in series with a current transformer (CT), the output of which is connected to a current relay (PT), contact current relay (PT) is included in the trigger circuit of the pulse relay

10 времени (РВ), контакт которого, закрывающийс с вьщержкой времени, включен в схему дистанционного управлени электрифицированной мазутной задвижки параллельно цеп м дистанционного управлени (ДУ), открыts тие мазутной задвижки происходит при включении магнитного пускател (Mli-O), закрытие - при включении магнитного пускател (МП-3).10 times (PB), the contact of which, closing with a latch of time, is included in the remote control circuit of an electrified fuel oil valve parallel to the remote control circuits (DU), the opening of the fuel oil valve occurs when the magnetic starter is turned on (Mli-O), closing - when switched magnetic starter (MP-3).

Схема работает следующим образом.The scheme works as follows.

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Claims

The switch B applies the voltage to the transformer CT winding BH4Hjao and the flow begins to flow in its secondary winding: the input of the current turnips RT, which is set to the rated current value, through the ZET and, having activated, turns on1 the pulse relay of time RV, the contact RV switches on the magnetic starter MP-O, which starts the drive of the drive for opening the fuel oil th valve, after the start of the relay, the relay is disconnected, and the MP-O starter becomes self-powered before its end switch is turned off by the switch installed on the fuel oil valve. The control unit (Fig. 2) contains a power supply source 1 connected to an electrothermal ignitor 2 via a current magnitude indicator 3, which, in turn, is connected via a time delay element 4 to a fuel-oil injector control circuit 5, and the latter via a drive 6 controls fuel supply. 6.4 Thus, the proposed method improves the reliability of the nozzle. Claim Method The method of controlling the operation of an injector equipped with a pilot by opening the fuel supply valve to the injector according to a command signal characterizing the thermal state of the pilot, characterized in that, in order to improve reliability when using a pilot of an electrothermal type connected to the power supply circuit, the current is measured and, after a time delay, it is used as a command signal characterizing the thermal state of the igniter. Sources of information taken into account in the examination 1. Zhgulev G., In, Start and adjustment of power units, M., Energie, 1978, p. 111-113.