Fuel heater

FIELD: machine building.

SUBSTANCE: electric fuel heater comprising body in form of the bolt with cavity in its rod, input and output holes, agitator, ceramic heating element, nickel-chromium spiral connected in series with the ceramic heating element, and casing. The internal cavity of the fuel heater body is made with spiral groove. The fuel agitator installed in the internal cavity of the body is in form of the bolt containing guide part and agitating element in form of the ellipse with spiral groove direct opposite to the spiral groove of the body.

EFFECT: higher efficiency of heat transfer.

1 dwg

 

The invention relates to the transport industry, in particular for preheating fuel systems fuel injection during operation of machine-tractor Park.

Known mixer diesel fuel (RF patent No. 2313000) [1], containing fixed inside the bottom of the tank outer tube with the inlet of the drainage line of heated fuel and installed within the outer tube inner tube with conical funnel for receiving the fuel from the tank connected to the intake fuel line. Conical funnel is arranged to move along the axis of the inner tube and provided with the connected cylindrical pipe. The surface of the conical funnel, the inner and outer pipes are covered with insulation and cavity heating fuel, formed between the outer pipe and insulation conical funnel placed thermal accumulators, electric heating coil and a circuit breaker with thermal (bi-metal) element. Electric heating coil and a circuit breaker connected to the constant current source and a switch. The rod is connected to a cylindrical pipe and a piston installed in the cylinder thermostat. Above the piston is installed spring in the intake pipe has a flexible wire waveguide, coupled with ultrasur the new generator, involved in working with reed switch and a permanent magnet attached to the piston thermostat

The disadvantage of this device is the design complexity and insufficient mixing process.

Known mixer mineral and vegetable compositions of motor fuel (RF patent No. 2377060) [2], comprising a housing with an input-output channels, conical working cavity, tapering to the output channel, liner, insert and mixing element, indicating the working cavity with the output channel of the housing. The insert has an axial inlet channel with a nozzle for supplying the plant composition in the cavity of the vortex chamber. On the inner surface of the liner is made of helical grooves with a number of turns from four to six. The input channel of the housing for feeding mineral composition is at an angle to the body. The axis of the input channel of the body coincides with the axis of the first coil winding grooves of the insert.

The disadvantage of this device is the lack of heating.

The closest analogue is self-regulating heater fuel (RF patent No. 2052150) [3], comprising a housing in the form of a hollow bolt, heater, made with nichrome spiral wound upon the body of the bolt with a certain step. Nichrome spiral, in turn, connected in series with a ceramic heating element (posit the rum). The heater is equipped with turbulization conical shape, is placed in the entrance hole.

The disadvantage of this device is the lack of effective mode of mixing during the heating throughout the design at high speed fuel supply.

The objective of the invention is to maintain a state of efficient mixing during the heating throughout the design at high speed fuel supply.

This object is achieved due to the fact that the heater fuel, comprising a housing made in the form of a bolt with a cavity in its terminal and input and output openings, turbolister, ceramic heating element, nichrome spiral, serially connected with a ceramic heating element, a casing mounted coaxially with the pivot bolt and rigidly connected with the latter, according to the invention, the internal cavity of the case is made with a spiral groove, and turbulization fuel located in the internal cavity of the housing made in the form of a bolt containing the guide part, and the turbulent element made in the form of an ellipse with a spiral groove, an oppositely directed relative to the helical grooves of the housing.

The essence of the proposed solution is illustrated by a drawing, which shows a device heater that is Liwa.

Fuel heater includes a casing 1, the casing 4 made in the form of a bolt with a cavity in its terminal and input and output holes communicated with the cavity and the fuel system, ceramic heating element 2 with a positive temperature coefficient of resistance (posistor) connected to a source of electric current contacts 5. On the outer surface of the housing 4 is wrapped around the coil 6 with a constant pitch. Nichrome coil 6 connected in series with the PTC resistors 2. Strip 3 teploizolirovat posistor 2 from the housing 4. The cover 10 serves to protect the PTC resistors 2 from mechanical damage and also acts as a heat insulating material. On the inner surface of the casing 4 is screw groove 9. Fitting fuel supply 7 is located at an angle to the housing 4. The axis of the channel fitting fuel 7 coincides with the axis of the first coil helical grooves 9 which results in a reduction of hydraulic resistance. In the inner cavity of the housing 4 has turbulator 8, consisting of the guide part and the actual turbulent element, which is made in the form of an ellipse with a spiral groove. A spiral groove 9 located in the internal cavity of the housing 4, are oppositely directed relative to the helical grooves of the turbulent element Century. Guide part And turbulize the RA can be performed with a cylindrical or conical surfaces, depending on the viscosity and rate of fuel supply, as well as the hydraulic resistance of the heater.

The turbulent element In the screw groove is designed for mixing of fuel flow, generated by passing the latter through the guide part And the turbulizer 8. The turbulent element In made in the form of an ellipse with a spiral groove on its surface, which allows to maintain turbulent motion of the fuel throughout the heater, in addition, it has a lower hydraulic resistance.

Because the heater is mounted in the fuel system of the engine during the period of high pressure, where the velocity of the fuel is very high, the efficiency of heat transfer process in our case is provided by the shape and location of the installation turbulizer.

Fuel heater works as follows. Through contacts 5 fuel heater electrically connected to the electrical system of the rolling vehicle and leave continuously. With the engine of fuel movement through the heater no. When the engine is running fuel with high speed, entering through the nozzle of the fuel falls on the guide part And the turbulizer 8, where it curls, washing the internal cavity of the housing 4, which is in turn heated nichrome coil 6 and is sent to the belisirma element C. Passing between the turbulent element and the inner cavity of the housing 4, the fuel is mixed, thus improving the heat exchange process. Due to the form and place of installation turbulizer 8 throughout the heater mixer is provided by turbulent motion of the fuel, which in turn improves the efficiency of heat transfer. During start-up and subsequent operation of the engine, the heat exchange in the heater increases and ceramic heating element 2 (posistor) over a long time is in the "open" state, the current in the circuit heaters maximum. While the main heating occurs from the work of nichrome helix 6, because its operating temperature of 400-500C. as the heating part of the heat is transferred to the body through the gasket 3 to the PTC resistors and the resistance in the circuit increases, resulting in lower current, and hence power of the heater.

Using the proposed design of the heater allows to increase the efficiency of heat transfer, which will be used as a diesel engine, and more viscous fuel.

Fuel heater, comprising a housing made in the form of a bolt with a cavity in its terminal and input and output openings, turbolister, ceramic heating element, nichrome spiral, serial is Ino connected with a ceramic heating element, casing installed coaxialline rod bolt and rigidly connected with the latter, characterized in that the inner cavity of the case is made with a spiral groove, and turbulization fuel located in the internal cavity of the housing made in the form of a bolt containing the guide part and the turbulent element made in the form of an ellipse with a spiral groove, an oppositely directed relative to the helical grooves of the housing.



 

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