WO2016101189A1 - Piston-turbine compound engine - Google Patents

Abstract

Provided is a piston-turbine compound engine, comprising a piston-type main engine (10), a turbine engine (12), an air channel (18), a turbine working-medium channel (14), an afterburner device (16), a bypass channel (20), and an air flow control device (38); the afterburner device (16) is arranged on the turbine working-medium channel (14), and the afterburner device (16) heats the turbine working medium by means of combustion; the bypass channel (20) is connected between the outlet part of a compressor and the afterburner device (16); the air flow control device (38) is used for controlling the compressed air of the compressor to enter a cylinder of the main engine, or to be delivered to the afterburner device (16) via the bypass channel (20). The piston-turbine compound engine addresses the issue of uninterrupted operation of an engine unit.

Description

 Piston turbine compound engine Technical field

The present invention relates to a power unit, and more particularly to a piston turbine compound engine.

Background technique

In existing devices that utilize exhaust gas to provide power, the exhaust of the main engine drives the turbine to rotate to drive the load. When the main engine is not working for some reason, the exhaust power generation portion does not work, causing interruption of power. When such a power unit is used to generate electricity, power interruption is caused.

In addition, the engine may need to adjust its own power output depending on the load. Under some extreme operating conditions, such as the case of steep slopes, it may be necessary for the engine to instantaneously explode an output that is much greater than its rated power, thus requiring the engine to have a large power reserve.

technical problem

In view of this, a piston turbine composite engine is proposed to solve at least one of the aforementioned problems.

Technical solution

The utility model relates to a piston turbine compound engine, which comprises a piston main engine, a turbine engine, an air passage, a turbine working channel, a supplemental combustion device, a bypass passage and an air flow direction control device. The piston main engine includes a cylinder and intake and exhaust valves in fluid communication with the cylinder. The turbine engine includes a rotating shaft and a turbine and a compressor fixed to the rotating shaft. The turbine includes a turbine working fluid inlet portion, and the compressor includes a compressor outlet portion. The air passage is disposed between the compressor outlet portion and the cylinder intake valve for supplying compressed air of the compressor to the cylinder via the intake valve. The turbine working fluid passage is disposed between the turbine working fluid inlet portion and the cylinder outlet valve for supplying a working fluid to the turbine to drive the turbine rotation, wherein the turbine is Rotation will drive the compressor to rotate to compress the air. The supplemental combustion device is disposed on the turbine working fluid passage, and the supplementary combustion device heats the turbine working fluid in a combustion manner, and the supplementary combustion device includes an inlet of the supplementary combustion device. The bypass flow passage is connected between the compressor outlet portion and the inlet of the afterburning device. The air flow control device is configured to control the compressed air of the compressor to be input to the main engine cylinder or to the supplemental combustion device via the bypass flow passage.

In an embodiment, the main engine includes a main shaft, and the turbine rotating shaft is mechanically coupled to the main shaft such that rotation of the rotating shaft is coaxially outputted with the main shaft.

In an embodiment, the main engine is coupled to a generator for driving the generator to generate electricity, and the generator is coupled to a motor to power the electric machine.

In an embodiment, the turbine engine is coupled to a generator for driving the generator to generate electricity, and the generator is coupled to a motor to power the motor.

In an embodiment, the main engine is coupled to a first generator for driving the first generator to generate electricity, and the first generator is coupled to a motor to power the motor, the turbine engine and the first A second generator connection is used to drive the second generator to generate electricity, and a second generator is coupled to the motor to power the motor.

In an embodiment, the main engine is coupled to a first generator for driving the first generator to generate electricity, the first generator is coupled to a motor; and the turbine engine is coupled to a second generator for Driving the second generator to generate electricity, the second generator is connected to the motor; the piston turbine compound engine further includes a battery, and the battery and the first generator and the second generator are at least A connection is received to receive power from the connected generator, the battery being coupled to the electric machine, the first generator, the second generator, and the battery selectively powering the motor, either alone or in combination.

In an embodiment, the main engine is coaxially output with the turbine engine, and the first generator and the second generator are the same generator.

A piston turbine compound engine is also proposed herein, which includes a piston main engine, a turbine engine, a first passage, a supplemental combustion device, a second passage, and a third passage. The piston type main engine includes an intake valve and an exhaust valve. The turbine engine includes a turbine and a compressor, wherein rotation of the turbine causes the compressor to rotate. The first passage is in fluid communication with the exhaust valve and the turbine. The supplemental combustion device is disposed on the first passage to heat the working fluid to be worked on the turbine in a combustion manner. The second passage is in fluid communication between the compressor and the intake valve, the third passage is in fluid communication between the compressor and the afterburning device, and the compressed air of the compressor is selected Or input to the main engine through the second passage or to the afterburning device through the third passage. Wherein, when the compressed air of the compressor is input to the main engine through the second passage, the afterburning device warms the exhaust gas of the main engine in a combustion manner; when the compressor is compressed When the air is input to the afterburning device through the third passage, the supplemental combustion device warms the compressed air in a combustion manner.

Beneficial effect

In summary, the present invention provides a piston turbine compound engine that combines a turbine engine with a piston main engine. When operating simultaneously, the turbine engine increases the power reserve of the entire engine block. Moreover, when the main engine is not running, the turbine engine section can also be operated separately, solving the problem of uninterrupted operation of the engine block. At the same time, the battery can be added, and if necessary, the piston main engine, the turbine engine and the battery simultaneously drive the load, increasing the power reserve of the composite engine.

DRAWINGS

1 is a system schematic of one embodiment of a piston turbine compound engine.

2 is a system schematic of another embodiment of a piston turbine compound engine.

Embodiments of the invention

Before the embodiments are described in detail, it is understood that the invention is not limited to the details The invention may be embodied in other ways. Also, it will be understood that the phraseology and terminology used herein are for the purpose of description The words "including", "comprising", "having", and <RTIgt; </ RTI> <RTIgt; </ RTI> used herein are meant to include the items listed thereafter, their equivalents, and other additional items. In particular, when describing "a certain element", the invention does not limit the number of the elements to one, and may include a plurality.

This paper provides a piston turbine compound engine, which mainly includes a piston main engine, a turbine engine, a first passage, a supplemental combustion device, a second passage and a third passage. The piston main engine includes an intake valve and an exhaust valve. The turbine engine includes a turbine and a compressor, wherein the rotation of the turbine causes the compressor to rotate. The first passage is in fluid communication between the exhaust valve and the turbine. The afterburning device is disposed on the first passage to heat the working fluid to be worked on the turbine in a burning manner. The second passage is in fluid communication with the compressor and the intake valve, and the third passage is in fluid communication between the compressor and the supplemental combustion device. The compressed air of the compressor is selectively input to the main engine through the second passage or to the afterburning device through the third passage. Wherein, when the compressed air of the compressor is input to the main engine through the second passage, the afterburning device heats the exhaust gas of the main engine in a combustion manner. When the compressed air of the compressor is input to the afterburning device through the third passage, the supplemental combustion device warms the compressed air in a combustion manner. Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

1 is a system schematic of one embodiment of a piston turbine compound engine. As shown in FIG. 1, the piston turbine compound engine includes a piston main engine 10, a turbine engine 12, a first passage 14, a supplemental combustion device 16, a second passage 18, and a third passage 20.

The piston-type main engine 10 includes a cylinder 22 and an intake valve 24 and an exhaust valve 26 that are in fluid communication with the cylinder 22. Air enters the cylinder 22 from the intake valve 24, participates in combustion expansion, and is exhausted from the exhaust valve 26.

The turbine engine 12 includes a turbine shaft 28 and a turbine 30 and a compressor 32 that are fixed to the turbine shaft 28, wherein rotation of the turbine 30 causes the compressor 32 to rotate together through the shaft 28 to compress air. The turbine 30 includes a turbine working fluid inlet portion 34 through which the working fluid enters the turbine to drive the turbine 30 to rotate. The compressor 32 includes a compressor outlet portion 36, and the air is compressed by the compressor 32 and discharged through the compressor outlet portion 36.

The first passage 14 is disposed between the cylinder exhaust valve 26 and the turbine working inlet portion 34 for supplying the working fluid to the turbine 30 to drive the turbine 30 to rotate. Therefore, in some places in this article, the first channel can also be referred to as a turbine working channel.

The afterburning device 16 is disposed on the first passage or the turbine working fluid passage 14 to heat the working fluid to be worked on the turbine in a combustion manner. If the turbine working fluid is exhaust from the main engine 10, the afterburning device 16 further combusts the exhaust gas to form an exhaust gas combustion product. The exhaust gas combustion is then supplied to the turbine 30 via the turbine fluid passage 14 to drive the turbine 30 to rotate. In general, the working efficiency of the turbine has a lot to do with the temperature of the working fluid before the turbine. The higher the temperature, the higher the efficiency. For piston engines, the exhaust gas temperature is typically between 450 and 550 degrees, at which temperature turbine efficiency is generally low. By increasing the temperature of the exhaust gas by the afterburning device 16 in a combustion manner, the efficiency of the turbine 30 is greatly increased. In some embodiments, the afterburning exhaust gas temperature is between 600 and 850 degrees. That is to say, by investing less fuel in the afterburning device 16, a greatly improved turbine efficiency can be obtained.

The second passage 18 is disposed between the compressor outlet portion 36 and the cylinder intake valve 24 for supplying compressed air of the compressor 32 to the cylinder 22 via the intake valve 24. Therefore, in some places in this article, the second channel can also be referred to as an air channel.

The third passage 20 is disposed between the compressor outlet portion 36 and the afterburning device 16 for supplying the compressed air of the compressor 32 to the afterburning device 16. That is, the compressed air generated by the compressor 32 under the drive of the turbine 30 can be selectively input to the main engine 10 through the second passage or air passage 18 or to the afterburning device 16 through the third passage 20.

When the compressed air of the compressor 32 is input to the main engine 10, the compressed air is combusted with the fuel injected into the cylinder 22 (for example, diesel), and then exhausted from the exhaust valve 26, and the afterburning device 16 is burned. The method warms the exhaust of the main engine 10 through the exhaust valve 26, thereby utilizing the higher temperature exhaust to drive the turbine 30 to rotate.

When the compressed air of the compressor 32 is input to the afterburning device 16 through the third passage 20, since the main engine 10 has no air input, the main engine 10 does not operate, and thus the main engine 10 does not generate exhaust gas. Instead, the fuel in the afterburning device 16 is combusted with the compressed air supplied from the compressor 32 to warm the compressed air of the compressor 32 in a combustion manner, the combustion products of which drive the turbine 30 to rotate. In this case, the compressed air bypasses the main engine 10 and passes directly through the third passage 20 to the afterburning device 16, so in some places herein, the third passage 20 may also be referred to as a bypass passage. In the case of compressed air bypass, compressor 32, afterburner 16 and turbine 30 constitute a conventional gas turbine. In this case, the main engine 10 does not operate, such as during repair or failure. That is, with the above configuration, even if the main engine 10 is not in operation, the turbine engine 12 portion can operate normally, which is advantageous in some cases. For example, if the composite engine is used for power generation, the turbine engine 12 can be utilized to achieve uninterrupted power generation even when the main engine 10 is inoperable.

The flow of the compressed air described above is controlled by the flow of air to the control unit 38. In the illustrated embodiment, the air flow direction control device 38 is a control valve 38 disposed adjacent the compressor outlet portion 36, and the compressed air that controls the compressor 32 is input to the main engine cylinder 22 via the air passage 18 or bypassed. The passage 20 is sent to the afterburning device 16.

In the piston turbine compound engine shown in Fig. 1, the piston engine part and the turbine engine part can be powered by two motors or coaxial outputs. The piston engine section can be operated in conjunction with the turbine engine section or it can be operated solely by the turbine engine alone. In some embodiments, the composite engine of FIG. 1 can also be combined with a battery to form a hybrid engine, as described in detail below.

2 is a system schematic of another embodiment of a piston turbine compound engine. In the embodiment of Fig. 2, the engine portion is the same as the embodiment of Fig. 1. The main engine 10 drives the first generator 40 for power generation, and the turbine engine 12 drives the second generator 42 for power generation. The power generated by the first generator 40 and the second generator 42 may be pre-stored in the battery 44 as reserve power, and thus at least one of the first generator 40 and the second generator 42 is connected to the battery 44 to charge the battery.

The first generator 40, the second generator 42 and the battery 44 are connected to the motor 46 for supplying power to the motor 46. The motor 46 is, for example, a drive motor of an electric or hybrid vehicle. Depending on the operating conditions of the vehicle, the first generator 40, the second generator 42 and the battery 44 can selectively power the motor 46 either individually or in various combinations. The practice of the present invention increases the power reserve of the engine relative to the power provided by only the main engine 10.

For example, on a flat road, it may only be necessary for the main engine 10 to drive the power generated by the first generator 40 to drive the motor 46, so that the turbine engine 12 portion can now drive the second generator 42 to charge the battery 44. Not used to drive cars.

As another example, in the event of a slope or increased vehicle load, it is possible that the main engine 10 drives the electric power from the first electric generator 40 to drive the electric motor 46 while the turbine engine 12 drives the electric power from the second electric generator 42.

For another example, when a steeper break or a further increase in vehicle load is encountered, it is possible that the main engine 10 drives the electric power generated by the first electric generator 40, the turbine engine 12 drives the electric power generated by the second electric generator 42, and is pre-stored in the battery. The three powers in 44 simultaneously drive the motor 46.

As described above, the main engine 10 and the turbine engine 12 can be output coaxially. In the coaxial output scheme, the first generator 40 and the second generator 42 are actually the same generator and are driven by the power of the main engine 10 and the turbine engine 12 coaxially output.

In summary, the present invention provides a piston turbine compound engine that combines a turbine engine with a piston main engine. When operating simultaneously, the turbine engine increases the power reserve of the entire engine block. Moreover, when the main engine is not running, the turbine engine section can also be operated separately, solving the problem of uninterrupted operation of the engine block. At the same time, the battery can be added, and if necessary, the piston main engine, the turbine engine and the battery simultaneously drive the load, increasing the power reserve of the composite engine.

The concepts described herein may be embodied in other forms without departing from the spirit and scope. The specific embodiments disclosed are to be considered as illustrative and not restrictive. Therefore, the scope of the invention is to be determined by the appended claims Any changes which come within the meaning and range of the claims are intended to be within the scope of the claims.

Claims (10)

A piston turbine compound engine characterized in that it comprises: a piston type main engine including a cylinder and intake and exhaust valves in fluid communication with the cylinder; a turbine engine, the turbine engine including a rotating shaft and a turbine and a compressor fixed to the rotating shaft, the turbine including a turbine inlet portion, the compressor including a compressor outlet portion; An air passage disposed between the compressor outlet portion and the cylinder intake valve for supplying compressed air of the compressor to the cylinder via the intake valve; a turbine working fluid passage disposed between the turbine inlet portion and the cylinder exhaust valve for supplying a working fluid to the turbine to drive the turbine rotation, wherein The rotation of the turbine causes the compressor to rotate to compress air; a supplemental combustion device, the supplemental combustion device is disposed on the turbine working fluid passage, and the supplementary combustion device heats the turbine working fluid in a combustion manner; a bypass passage connected between the compressor outlet portion and the afterburning device; The air flows to the control device for controlling the compressed air of the compressor to be input to the main engine cylinder or to the afterburning device via the bypass passage. A piston turbine compound engine according to claim 1, wherein said main engine includes a main shaft, said turbine shaft being mechanically coupled to said main shaft such that rotation of said shaft is coaxial with said main shaft . A piston turbine compound engine according to claim 1 wherein said air flow direction control means comprises a control valve. A piston turbine compound engine according to claim 1 wherein said main engine is coupled to a generator for driving said generator to generate electricity, said generator being coupled to a motor for powering said motor. A piston turbine compound engine according to claim 1 wherein said turbine engine is coupled to a generator for driving said generator to generate electricity, said generator being coupled to a motor for powering said motor. A piston turbine compound engine according to claim 1, wherein said main engine is coupled to a first generator for driving said first generator to generate electricity, said first generator being coupled to said motor to be opposite The motor is powered, the turbine engine is coupled to a second generator for driving the second generator to generate electricity, and the second generator is coupled to the motor to power the motor. A piston turbine compound engine according to claim 1, wherein said main engine is coupled to a first generator for driving said first generator to generate electricity, said first generator being coupled to said electric machine; a turbine engine coupled to the second generator for driving the second generator to generate electricity, the second generator coupled to the electric machine; the piston turbine compound engine further including a battery, the battery and the first At least one of a generator and a second generator are coupled to receive power of the connected generator, the battery being coupled to the electric machine, the first generator, the second generator, and the battery being selectively separate or The motor is powered in combination. A piston turbine compound engine according to claim 7, wherein said main engine is coaxially outputted with said turbine engine, said first generator and said second generator being the same generator. A piston turbine compound engine characterized in that it comprises: a piston type main engine including an intake valve and an exhaust valve; a turbine engine, the turbine engine including a turbine and a compressor, wherein rotation of the turbine causes the compressor to rotate; a first passage, the first passage being in fluid communication with the exhaust valve and the turbine; a supplemental combustion device, the supplemental combustion device is disposed on the first passage, and heats a working fluid to be worked on the turbine in a combustion manner; a second passage, the second passage being in fluid communication with the compressor and the intake valve; a third passage, the third passage being in fluid communication between the compressor and the afterburning device, the compressed air of the compressor being selectively input to the main engine or through the second passage a third passage is input to the afterburning device, wherein when the compressed air of the compressor is input to the main engine through the second passage, the supplemental combustion device is in a combustion manner to the main engine The exhaust gas is warmed; when the compressed air of the compressor is input to the afterburning device through the third passage, the supplemental combustion device warms the compressed air in a combustion manner. A piston turbine compound engine according to claim 9, wherein said main engine is coupled to a first generator for driving said first generator to generate electricity, said first generator being coupled to said electric machine; a turbine engine coupled to the second generator for driving the second generator to generate electricity, the second generator coupled to the electric machine; the piston turbine compound engine further including a battery, the battery and the first At least one of a generator and a second generator are coupled to receive power of the connected generator, the battery being coupled to the electric machine, the first generator, the second generator, and the battery being selectively separate or The motor is powered in combination.