SU682245A1

SU682245A1 - System for counter-current washing of fuel filter

Info

Publication number: SU682245A1
Application number: SU782606554A
Authority: SU
Inventors: Юрий Львович Астанский; Владимир Анатольевич Романов
Original assignee: Предприятие П/Я А-7917
Priority date: 1978-04-26
Filing date: 1978-04-26
Publication date: 1979-08-30

Description

1one

Изобретение относитс к области двигателестроени и предназначено дл систем фильтрации топлива и масла.The invention relates to the field of engine-building and is intended for filtration systems for fuel and oil.

Известны системы промывки топливного фильтра противотоком, содержащие насос, фильтр, соединенный напорным трубопроводом с насосом, отводную магистраль загриоменного топлива из фильтра и установленный в ней запорный клапан .There are known systems for flushing the fuel filter with countercurrent, containing a pump, a filter connected by a pressure pipe to the pump, a discharge line of contaminated fuel from the filter and a shut-off valve installed in it.

Недостатком этих систем вл етс то, что нерационально используетс врем промывки , так как они не оборудованы средствами , учитывающими изменение в зкости и плотности примен емого в дизеле топлива .The disadvantage of these systems is that the washing time is inefficiently used, since they are not equipped with means that take into account the change in viscosity and density of the fuel used in the diesel engine.

Целью насто щего изобретени вл етс повышение эффективности путем регулировани времени иромывки в зависимости от в зкости топлива.The object of the present invention is to increase the efficiency by adjusting the washing time depending on the viscosity of the fuel.

Указанна цель достигаетс тем, что в отводной магистрали установлена мерна емкость с дроссел ми на входе и выходе и указателем уровн , снабженным дистанционной св зью с насосом и запорным клапаном , причем дроссель на входе в мерную емкость выполнена в виде цилиндрического канала, а дроссель на выходе - в виде плоской диафрагмы, и проходное сечение дроссел на входе в мерную емкость больше проходного сечени выходного дроссел .This goal is achieved by the fact that a standard tank is installed in a branch pipe with inlet and outlet throttles and a level indicator equipped with remote communication with a pump and a shut-off valve, the throttle at the inlet to the measuring tank made in the form of a cylindrical channel, and the throttle on the outlet - in the form of a flat diaphragm, and the throttle flow area at the entrance to the measuring capacity is larger than the flow area of the output throttle.

На чертеже представлена принудительна схема системы промывки топливногоThe drawing shows a forced diagram of the fuel flushing system.

фильтра.filter.

Система состоит из насоса 1, соединенного напорным трубопроводом 2 через обратный клапан 3 с фильтром 4, разделенным фильтрующей нерегородкой 5 на двеThe system consists of a pump 1, connected by a pressure pipe 2 through a check valve 3 with a filter 4, divided by filtering area 5 into two

полости, и отводной магистрали 6 с запорным клапаном 7. В отводной магистрали 6 за клапаном 7 размещена мерна емкость 8 с указателем уровн 9, имеющим дистанционную св зь с промывочным насосом 1 иcavity, and a discharge line 6 with a shut-off valve 7. In the discharge line 6 behind the valve 7 is placed a measuring tank 8 with a level indicator 9, which is remotely connected with the flushing pump 1 and

запорным клапаном 7. В отводной магистрали 6 на входе в емкость 8 установлен дроссель 10, а на выходе - дроссель 11. Кроме того, емкость 8 снабжена сливным отверстием 12. Дроссель 10 выполнен в виде цилиндрического канала, конструктивные параметры которого выполнены в соответствии со следующим соотношением:a shut-off valve 7. A choke 10 is installed at the inlet of the tank 8 in the discharge line 6, and a choke 11 is installed at the outlet. In addition, the tank 8 is provided with a drain hole 12. The choke 10 is designed as a cylindrical channel, the design parameters of which are made in accordance with the following ratio:

0,794.10, 0.794.10,

ПP

где d - диаметр цилиндрического канала, / - длина канала,where d is the diameter of the cylindrical channel, / is the length of the channel,

Claims

V is the kinematic connection of the fuel; p is the density of the fuel. DR - pressure drop in the channel Drossel. The throttle 11 is made in the form of a flat diaphragm, the flow area of which is selected with the following ratio: f ,. llYghfl where / 1 is the throttle cross section area 10, / 2 is the throttling cross section area 11, g is the acceleration of free fall, rt is the height of the head in the tank 8, corresponding to the difference of the level of the drain hole 12 and the level indicator 9. Such execution of throttles allows you to clearly determine the time required for high-quality washing of the filter. The time is determined by the following expression: Knd-P -0.5 (L1 / 2-nd 128-vpi where EI is the volume of the measuring capacitance 8, n is the number of cylindrical channels of Drossel 10, 1 is the flow rate through the hole in the thin wall. The system works as follows. When a filter clogging signal is received, the flushing pump 1 is turned on. At the same time, the valve 7 is commanded to open and the pump 1 is pumped fuel in the opposite direction to filtration through the filter 5 and the throttle 10 into the measuring tank 8. From the measuring tank 8 through the drain hole one 2 and the throttle And the fuel enters the drainage of the processing and separation of mechanical impurities, the throttle 10 provides laminar outflow of the fuel, and the throttle 11, made in the form of a flat diaphragm creates a turbulent flow of fuel. will be more than through the choke And, the flow through which does not depend on the viscosity of the fuel, due to the fact that the flow area of the droplets 10 is greater than the flow area of the droplets I. The filling time of the tank 8 to the level gauge 9 due to the difference in volume scab expiration chokes 10 and 11 and 5 10 15 20 25 30 35 40 45 50 55 is employed to filter the washing time duration. As can be seen from the expression, the washing time D varies in proportion to the change in the physical properties of the filtered liquid, viscosity and density. With an increase in the latter, which corresponds to a worse quality of fuel and, accordingly, to a greater clogging of the filter septum, the washing time automatically increases and vice versa with decreasing viscosity and density, the washing time decreases. When the tank 8 is filled to a fixed level indicator 9, having remote communication with the flushing pump 1 and the shut-off valve 7, a signal is given, the flushing pump is turned off, the valve 7 is closed and the system starts to operate in filtration mode. Thus, the flushing system of the fuel filter, by ensuring the dependence of the flushing time on the physical properties of the fuel, makes it possible to increase the efficiency of operation. 1. The flushing of the fuel filter with countercurrent comprising a pump, a filter connected by a pressure pipe to a pump, a discharge line of contaminated fuel from the filter and a shut-off valve installed therein, in order to increase efficiency by adjusting the flushing time depending on the viscosity of the fuel, a volumetric tank with throttles at the inlet and outlet and with a level indicator, fitted with a remote connection to the pump and the shut-off valve, is installed in the bypass line.

2. The system according to claim 1, wherein the choke at the entrance to the measuring tank is made in the form of a cylindrical channel, and the choke at the exit is in the form of a flat diaphragm.

3. The system of PP. 1, 2, characterized in that the flow area of the throttles at the entrance to the measuring capacity is larger than the flow area of the output throttle. Sources of information taken into account during the examination 1. Bolshakov V. F. and Ginzburg A. G. Ship's low-speed diesel engines. L., “Shipbuilding, 1971, p. 144, fig. 53.

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