RU71382U1 - POWER UNIT WITH SEPARATED COMPRESSION-EXPANSION PROCESSES - Google Patents

Abstract

The proposal relates to mechanical engineering, namely to engine building and can be used to increase the efficiency of the conversion of thermochemical energy of combusted fuel into mechanical work. The proposed power plant with separate compression-expansion processes and exhaust gas energy recovery contains: an expansion machine 1, a crank mechanism 2, a piston 3, an exhaust valve 4, an intake valve 5, an exhaust manifold 6, a nozzle 7, a fuel tank 8, a fuel pipe 9 , Stirling engine 10, heater cavity 11, compressor 12, pipeline 13. receiver 14, turbine 15, supercharger drive shaft 16, centrifugal supercharger 17, air duct 18 and cooling jacket 19. Compared to the prototype, the proposed power plant with separate compression-expansion processes and the utilization of exhaust gas energy, it does not require the expenditures of the generated expansion machine power to organize the cooling process of its cylinder and hot parts, which allows us to increase the useful power by five percent or more. 1 s.p. f-ly, 1 Fig.

Description

The invention relates to mechanical engineering, namely to engine building and can be used to increase the efficiency of thermochemical energy of combusted fuel in mechanical work.

Known power plant (combined engine) "Orion" (Hooker RJ Orion-aGas-Generator Turbocompound Engine / Hooker SAE Tr 1957, P.293), which contains: a piston engine-generator of hot gases, a power gas turbine operating at the expense of hot energy gases, a centrifugal supercharger driven by a gas turbine and supplying air for combustion in the piston engine cylinders and for cooling them with air.

The disadvantage of this design is the cost of part of the thermochemical energy of the fuel to drive a centrifugal supercharger.

A known power plant with separate compression and expansion processes (see. Patent for utility model. RU No. 52938, Cl. F02B 5/02, publ. 2006). It includes: an expansion machine containing a crank mechanism, a piston, an exhaust and an intake valve, an exhaust pipe, a nozzle, a fuel tank, a fuel pipe, a cavity of a Stirling engine heater, a compressor, a pipe, and a receiver.

The disadvantage of this power plant is the need to cool the expansion machine to ensure that part of the generated effective power is expended and, as a result, the fuel consumption for the production of a unit of power is increased.

This engine design is the closest in technical essence and adopted as a prototype.

The technical result from the use of the invention is expressed in increasing the efficiency of converting the thermochemical energy of the burned fuel into mechanical work and, as a result, reducing fuel consumption for the production of a unit of power.

The technical result is achieved by the fact that in the proposed power plant with separate compression-expansion processes and the utilization of exhaust gas energy, the power generated by the turbine due to the kinetic energy of the exhaust gas is used to ensure the cooling process of the expansion machine.

The proposal is illustrated in the figure (figure 1), which shows a schematic diagram of a power plant with separate compression-expansion processes with the utilization of exhaust gas energy. It contains: an expansion machine 1, a crank mechanism 2, a piston 3, an exhaust valve 4, an intake valve 5, an exhaust valve a manifold 6, a nozzle 7, a fuel tank 8, a fuel pipe 9, a Stirling engine 10, a heater cavity 11, a compressor 12, a pipe 13, a receiver 14, a turbine 15, a shaft

a supercharger drive 16, a centrifugal supercharger 17, an air duct 18 and a cooling jacket 19.

The power plant operates with separate compression-expansion processes and the utilization of exhaust gas energy as follows.

After the completion of the next working cycle, the exhaust gases from the expansion machine 1 through the exhaust valve 4 through the exhaust pipe 6 enter the cavity 11 surrounding the heater of the Stirling engine 10. Having even higher kinetic energy, the exhaust gases exit the cavity of the heater 11 of the Stirling engine 10. Installed for the Stirling engine 10, the turbine 15 transmits rotational motion, through the drive shaft of the supercharger 16 to the centrifugal supercharger 17. The centrifugal supercharger 17 draws in atmospheric air and directs it first through the air duct 18 to the cooling jacket 19, where the cylinder of the expansion machine 1 is blown with cold air, which provides cooling of it and the hot parts of the expansion machine 1. The power generated by the Stirling engine 10 is used to compress the air in the compressor 12. Compressed air through the pipe 13 is supplied into the receiver 14, from where through the inlet valve 5 it enters the cylinder of the expansion machine 1 at the moment when the piston 3 begins to move from the top dead center to the bottom. At the same time, fuel is injected into the cylinder of the expansion machine 1 through the nozzle 7, which enters through the fuel line 9 from the fuel tank 8. The fuel entering the cylinder ignites and occurs

expansion of the combustion products, accompanied by the work of moving the piston 3. Through the crank mechanism 2, this work is transferred to the exit of the expansion machine 1 and can be useful.

Compared with the prototype, the proposed power plant with separate compression-expansion processes and exhaust gas energy recovery does not require the power generated by the expansion machine to organize the cooling process of its cylinder and hot parts, which allows us to increase the useful power by five percent or more (Automotive engines / Edited by M.S. Hovakh, Moscow: Mashinostroenie, 1977, p. 547) and, as a result, reduce fuel consumption for the production of a unit of power.

Claims (1)

A power plant with separate compression-expansion processes, including an expansion machine with a crank mechanism, a piston with exhaust and intake valves, with an exhaust manifold and nozzle, a fuel tank, a fuel pipe, a Stirling engine heater cavity, a compressor and a receiver connected by a pipeline, characterized in that it is additionally equipped with a turbine connected to a centrifugal supercharger through its drive shaft and an air duct connected to the cooling jacket of the expansion machine, and due to The net exhaust energy of the latter is driven by a turbine.