CN111305941A

CN111305941A - Engine tail gas energy recovery recycles device

Info

Publication number: CN111305941A
Application number: CN202010159143.2A
Authority: CN
Inventors: 崔国亮; 范礼; 丁万龙; 周海皎; 王伟
Original assignee: Japhl Powertrain Systems Co ltd
Current assignee: Japhl Powertrain Systems Co ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-06-19

Abstract

The invention provides an engine tail gas energy recycling device applied to the technical field of automobile engines, an exhaust turbine (3) is connected with a main shaft (5) of a compressor (4), an impeller (13) is arranged on the main shaft (5), the compressor (4) is respectively communicated with a high-pressure pipeline (6) and a low-pressure pipeline (7), a refrigerant is stored in the high-pressure pipeline (6), a cooling part comprises a condenser (8) and an evaporator (9), the high-pressure pipeline (6) is sequentially communicated with the condenser (8) and the evaporator (9), the low-pressure pipeline (7) is communicated with the evaporator (9), an evaporator air inlet (10) and an evaporator air outlet (11) are arranged on the evaporator (9), and the engine tail gas energy recycling device is disclosed by the invention, the exhaust heat energy of the engine is recovered, so that the reduction of the air inlet temperature of the engine is realized, and the aims of improving the efficiency of the engine and improving the emission are fulfilled.

Description

Engine tail gas energy recovery recycles device

Technical Field

The invention belongs to the technical field of automobile engines, and particularly relates to an engine tail gas energy recycling device for recycling and refrigerating by utilizing tail gas energy.

Background

In the working process of the engine, the compression ratio can be improved by reducing the air inlet temperature, the expansion working stroke is lengthened, and the compression ratio is improved. Under the condition of a given compression ratio, the antiknock characteristic can be improved by reducing the air inlet temperature, the ignition advance angle is increased, and the engine torque is improved. For the existing supercharged engine, the sucked air is supercharged through a supercharger, and the supercharged air is too high in temperature and directly enters the engine to be combusted, so that the combustion efficiency of the engine is influenced. Therefore, the intake air temperature needs to be cooled to a certain degree before entering the engine. In the existing intercooling system, engine intake air enters an intercooler after being turbocharged. And the intercooler adopts forced air cooling and water-cooling two kinds of modes, and cooling efficiency is not high to along with temperature and engine compartment temperature rise, cooling efficiency can descend, and the cooling effect also can worsen. For existing naturally aspirated engines, the intake system has no cooling means. The intake air temperature cannot be cooled. Data shows that the engine power is reduced by 3-5% when the inlet air temperature of the naturally aspirated engine rises by 10 ℃, because high-temperature air directly enters the engine, the density of the inlet air is reduced, the effective charging efficiency of the engine is reduced, the combustion temperature is easily overhigh, the detonation tendency is increased, and the ignition advance angle must be reduced to avoid damage to the engine. The reduction of the ignition advance angle leads to the reduction of the combustion pressure and temperature, which inevitably leads to the reduction of the combustion efficiency and causes larger energy loss. And further the power performance and the economic performance of the whole vehicle are poor. The disadvantages of the current scheme are: 1) after the supercharger type is cooled by the intercooler, the inlet air temperature is still high (about 50 ℃), and the cooling effect is poor along with the increase of the load of the engine; the temperature of admitting air can not be adjusted voluntarily, and the cooling effect of intercooler relies on water temperature and engine compartment temperature to cooling efficiency is lower. 2) There is no charge cooling system for naturally aspirated engines. 3) There is no more efficient use of exhaust energy. Thus, there are significant deficiencies in the prior art.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the defects of the prior art, the engine tail gas energy recycling device has a simple structure, changes the thinking, realizes the reduction of the air inlet temperature of the engine through the recovery of the engine exhaust energy, changes the combustion temperature, and further achieves the purposes of improving the efficiency of the engine and improving the emission.

To solve the technical problems, the invention adopts the technical scheme that:

the invention relates to an engine tail gas energy recycling device which comprises a turbine compressor part and a cooling part, wherein an engine exhaust pipe is communicated with an exhaust inlet on the turbine compressor part, an exhaust outlet is also arranged on the turbine compressor part, an exhaust turbine in the turbine compressor part is connected with a main shaft of the compressor, an impeller is arranged on the main shaft, the compressor is respectively communicated with a high-pressure pipeline and a low-pressure pipeline, a refrigerant is stored in the high-pressure pipeline, the cooling part comprises a condenser and an evaporator, the high-pressure pipeline is sequentially communicated with the condenser and the evaporator, the low-pressure pipeline is communicated with the evaporator, and an evaporator air inlet and an evaporator air outlet are arranged on the evaporator.

And an air outlet of an evaporator of the cooling part is communicated with an engine throttle valve and/or an air outlet of an automobile air conditioning system.

And an air inlet of an evaporator of the cooling component is communicated with an air filter.

The condenser is provided with a cooling fan, and a liquid storage dryer is arranged on a high-pressure pipeline between the condenser and the evaporator.

And a thermostatic expansion valve is arranged on a high-pressure pipeline between the liquid storage dryer and the evaporator of the cooling part.

One end of the low-pressure pipeline, which is close to the evaporator, is provided with a temperature sensing element, and the temperature sensing element is connected with the thermostatic expansion valve.

The main shaft pass through bearing I and bearing II and be connected with compressor housing, set up the lubricating oil passageway on the compressor housing, the lubricating oil passageway passes through I position of bearing and II positions of bearing, lubricating oil passageway one end is the lubricating oil entry, the lubricating oil passageway other end is the lubricating oil export.

The turbine compressor part comprises an exhaust turbine shell and a compressor shell, an exhaust inlet and an exhaust outlet are formed in the exhaust turbine shell, and a main shaft is installed in the compressor shell.

The engine tail gas energy recycling device further comprises an exhaust bypass valve, and the exhaust bypass valve is communicated with the high-pressure pipeline.

The engine tail gas energy recovery and reuse device further comprises a speed reducer, the speed reducer is arranged on the turbine compressor part and comprises a speed reducer shell and a speed reduction gear, the exhaust turbine is connected with the main shaft of the compressor through the speed reduction gear, and the speed reducer shell is communicated with the lubricating oil channel.

By adopting the technical scheme of the invention, the following beneficial effects can be obtained:

according to the engine tail gas energy recycling device, tail gas exhausted by a turbine compressor part enters a cooling part through an exhaust pipe, the tail gas pushes an exhaust turbine to rotate at a high speed, and the exhaust turbine is rigidly connected with an impeller through a main shaft of the compressor. An exhaust bypass valve is mounted on the exhaust turbine. The exhaust bypass valve can be directly connected with the high-pressure pipe, and the opening degree of the exhaust bypass valve is adjusted through the pressure of the high-pressure pipe. In the cooling system, a high-pressure pipeline and a low-pressure pipeline are respectively connected with the turbocompressor system. There is the refrigerant in the high-low pressure pipeline, and the refrigerant among the high-pressure line flows through the condenser, has cooling fan in the condenser, can dispel the heat to the refrigerant that flows through, and the refrigerant in the condenser takes place the phase transition after the temperature reduction, becomes liquid, can get rid of moisture and the impurity of the inside behind the receiver drier that flows through. The high-pressure liquid enters the evaporator after passing through the thermostatic expansion valve, the pressure in the pipeline is reduced at the moment, the liquid is changed into gas, and a large amount of heat can be absorbed at the moment, so that the temperature of the evaporator is reduced. A temperature sensing element is arranged at an outlet of a low-pressure pipeline at the evaporator end, and the temperature sensing element can control the opening and closing of the thermostatic expansion valve according to the change of temperature. The two ends of the evaporator are respectively connected with the back of the turbocharger and the front of the throttle valve, and the evaporator can greatly reduce the air inlet temperature of the engine. Low intake temperatures may alter combustion temperatures, thereby increasing engine efficiency and improving emissions. Therefore, the temperature of the inlet air of the engine is reduced at low temperature by recycling the tail gas, so that the working performance of the engine is improved. The engine tail gas energy recycling device is simple in structure, changes thought, achieves the purposes of reducing the intake temperature of the engine and changing the combustion temperature through engine exhaust heat energy recycling, and further achieves the purposes of improving the efficiency of the engine and improving the emission.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

FIG. 1 is a schematic structural diagram of an engine exhaust energy recycling device according to the present invention;

FIG. 2 is a schematic view of a portion of a turbocompressor component of the engine exhaust energy recovery and reuse apparatus according to the present invention;

FIG. 3 is a schematic view of a partial structure of a cooling component of the engine exhaust energy recycling device according to the present invention;

FIG. 4 is a schematic diagram of a prior art supercharged engine;

in the drawings, the reference numbers are respectively: 1. an exhaust gas inlet; 2. an exhaust outlet; 3. an exhaust turbine; 4. a compressor; 5. a main shaft; 6. a high pressure line; 7. a low pressure line; 8. a condenser; 9. an evaporator; 10. an evaporator air inlet; 11. an evaporator air outlet; 12. an engine throttle; 13. an impeller; 14. a cooling fan; 15. a liquid storage dryer; 16. a thermostatic expansion valve; 17. a temperature sensing element; 18. a bearing I; 19. a bearing II; 20. a lubricant inlet; 21. a lubricant outlet; 22. an exhaust bypass valve; 23. an exhaust bypass valve regulating valve; 24. a turbocompressor component; 25. a turbocompressor component; 26. a cooling member; 27. an engine; 28. an intercooler; 29. an engine exhaust manifold; 30. a turbocharger.

Detailed Description

The following detailed description of the embodiments of the present invention, such as the shapes and structures of the components, the mutual positions and connection relations among the components, the functions and operation principles of the components, will be made by referring to the accompanying drawings and the description of the embodiments:

as shown in fig. 1-fig. 3, the present invention is an engine exhaust energy recycling device, which includes a turbo compressor part 25 and a cooling part 26, an engine exhaust pipe is communicated with an exhaust inlet 1 on the turbo compressor part, an exhaust outlet 2 is further disposed on the turbo compressor part, an exhaust turbine 3 in the turbo compressor part is connected with a main shaft 5 of a compressor 4, an impeller 13 is disposed on the main shaft 5, the compressor 4 is respectively communicated with a high pressure pipeline 6 and a low pressure pipeline 7, a refrigerant is stored in the high pressure pipeline 6, the cooling part includes a condenser 8 and an evaporator 9, the high pressure pipeline 6 is sequentially communicated with the condenser 8 and the evaporator 9, the low pressure pipeline 7 is communicated with the evaporator 9, and the evaporator 9 is provided with an evaporator air inlet 10 and an evaporator air outlet 11. In the above structure, the exhaust gas discharged from the turbo compressor system (turbo compressor part) enters the compressor system (cooling part) through the exhaust pipe, the exhaust gas pushes the exhaust turbine 3 to rotate at a high speed, and the exhaust turbine 3 and the impeller 13 are rigidly connected through the main shaft 5 of the compressor. An exhaust bypass valve is mounted on the exhaust turbine. The exhaust bypass valve can be directly connected with the high-pressure pipe, and the opening degree of the exhaust bypass valve is adjusted through the pressure of the high-pressure pipe. In the cooling system, a high-pressure pipeline and a low-pressure pipeline are respectively connected with the turbocompressor system. There is the refrigerant in the high-low pressure pipeline, and the refrigerant among the high-pressure line flows through the condenser, has cooling fan in the condenser, can dispel the heat to the refrigerant that flows through, and the refrigerant in the condenser takes place the phase transition after the temperature reduction, becomes liquid, can get rid of moisture and the impurity of the inside behind the receiver drier that flows through. The high-pressure liquid enters the evaporator after passing through the thermostatic expansion valve, the pressure in the pipeline is reduced at the moment, the liquid is changed into gas, and a large amount of heat can be absorbed at the moment, so that the temperature of the evaporator is reduced. A temperature sensing element is arranged at an outlet of a low-pressure pipeline at the evaporator end, and the temperature sensing element can control the opening and closing of the thermostatic expansion valve according to the change of temperature. The two ends of the evaporator are respectively connected with the back of the turbocharger and the front of the throttle valve, and the evaporator can greatly reduce the air inlet temperature of the engine. Low intake temperatures may alter combustion temperatures, thereby increasing engine efficiency and improving emissions. The design idea of the invention is to realize the cooling of the engine intake air at low temperature by recycling the tail gas, thereby improving the working performance of the engine. The engine tail gas energy recycling device is simple in structure, changes thought, and achieves the purpose of reducing the intake temperature of the engine through the recovery of the engine exhaust heat energy, so that the combustion temperature is changed, and the purposes of improving the efficiency of the engine and improving the emission are achieved.

An evaporator air outlet 11 of an evaporator 9 of the cooling part is communicated with an engine throttle valve 12 and/or an air outlet of an automobile air conditioning system. In the structure, the air outlet 11 of the evaporator can be communicated with the engine throttle valve 12, the air outlet of the automobile air-conditioning system, and the engine throttle valve 12 and the air outlet of the automobile air-conditioning system. Thus, the cool air communicated to the engine throttle 12 can reduce the intake problem, achieve a reduction in the intake temperature of the engine, and thereby change the combustion temperature. And the air outlet communicated with the automobile air-conditioning system can directly replace a main air conditioner, thereby realizing the cooling effect of the air conditioner in the automobile and reducing the cost.

The evaporator air inlet 10 of the evaporator 9 of the cooling component is communicated with an air filter. With the above arrangement, the evaporator air intake 10 is used for engine intake air which is supplied for engine operation. After passing through the evaporator, the air is quickly cooled, so that the air entering the engine is low-temperature air, and the aims of improving the efficiency of the engine and improving the emission are finally fulfilled.

The condenser 8 is provided with a cooling fan 14, and a liquid storage dryer 15 is arranged on the high-pressure pipeline 6 between the condenser 8 and the evaporator 9. A thermostatic expansion valve 16 is arranged on the high-pressure pipeline 6 between the liquid storage drier 15 and the evaporator 9 of the cooling part. One end of the low-pressure pipeline 7, which is close to the evaporator 9, is provided with a temperature sensing element 17, and the temperature sensing element 17 is connected with the thermostatic expansion valve 16. In the cooling system, the high-pressure pipeline and the low-pressure pipeline are respectively connected with the turbocompressor system. There is the refrigerant in the high-low pressure pipeline, and the refrigerant among the high-pressure line flows through the condenser, has cooling fan in the condenser, can dispel the heat to the refrigerant that flows through, and the refrigerant in the condenser takes place the phase transition after the temperature reduction, becomes liquid, can get rid of moisture and the impurity of the inside behind the receiver drier that flows through. The high-pressure liquid enters the evaporator after passing through the thermostatic expansion valve, the pressure in the pipeline is reduced at the moment, the liquid is changed into gas, and a large amount of heat can be absorbed at the moment, so that the temperature of the evaporator is reduced. The temperature sensing element of the low-pressure pipeline at the evaporator end can control the opening and closing of the thermostatic expansion valve according to the change of temperature. The two ends of the evaporator are respectively connected with the back of the turbocharger and the front of the throttle valve, and the evaporator can greatly reduce the air inlet temperature of the engine.

The main shaft 5 is connected with a shell of the compressor 4 through a bearing I18 and a bearing II 19, a lubricating oil channel is arranged on the shell of the compressor 4, the lubricating oil channel passes through the bearing I18 and the bearing II 19, one end of the lubricating oil channel is a lubricating oil inlet 20, and the other end of the lubricating oil channel is a lubricating oil outlet 21. Above-mentioned structure installs bearing I18 and bearing II 19 at the main shaft both ends, and lubricating oil gets into from the lubricating oil entry, and inside flows, passes through the lubricating oil export outflow again. Thus, during high speed rotation of the main shaft 5, the lubricating oil cools and lubricates the bearings to prevent wear.

The turbine compressor part comprises an exhaust turbine shell and a compressor shell, wherein an exhaust inlet 1 and an exhaust outlet 2 are arranged on the exhaust turbine shell, and a main shaft 5 is arranged in the compressor shell.

The engine tail gas energy recycling device further comprises an exhaust bypass valve 22, and the exhaust bypass valve 22 is communicated with the high-pressure pipeline 6. In the above structure, the exhaust bypass valve is directly connected to the high-pressure pipe, and the opening of the exhaust bypass valve is adjusted by the pressure of the high-pressure pipe.

The engine tail gas energy recovery and reuse device further comprises a speed reducer, the speed reducer is arranged on the turbine compressor part and comprises a speed reducer shell and a speed reduction gear, the exhaust turbine 3 is connected with the main shaft 5 of the compressor 4 through the speed reduction gear, and the speed reducer shell is communicated with the lubricating oil channel. In the structure, the exhaust turbine and the compressor are not directly connected, and the middle part of the exhaust turbine is provided with the speed reducing mechanism. The reduction mechanism includes a reduction gear and a reduction gear case. The reducer casing is provided with a lubricating oil inlet for lubricating the reducer gear and the gear bearing.

On one hand, the engine tail gas energy recycling device can directly supply cold air formed by refrigeration of the cooling component to an air conditioning system in the vehicle and partially replace a main air conditioner, so that the starting use frequency of the air conditioner is reduced, and the energy-saving effect is achieved; on the other hand, the cold air generated by the cooling means may be used for cooling the intake air to lower the engine intake air temperature, thereby improving the engine thermal efficiency, particularly the engine efficiency at high temperatures. When the device works, the energy of the exhaust gas is utilized to drive the compressor in the cooling part. The engine air intake is cooled by using cold air, the automobile air-conditioning compressor can be independently used for refrigeration, and a refrigerant is supplied to the cooling part, or the exhaust turbine compression refrigeration and the main compressor (driven by engine accessories or electrically driven) work together, and the exhaust turbine refrigeration can be used for cooling the cockpit; the main compressor may be used with the exhaust turbine compressor for charge cooling during high engine torque output conditions to maximize engine torque. Therefore, the working performance of the engine is effectively improved.

The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, changes and equivalents of the embodiments of the invention, and its application to other applications without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an engine exhaust energy recuperation recycles device which characterized in that: the engine tail gas energy recycling device comprises a turbocompressor part and a cooling part, an engine exhaust pipe is communicated with an exhaust inlet (1) on the turbocompressor part, an exhaust outlet (2) is also arranged on the turbocompressor part, an exhaust turbine (3) in the turbocompressor part is connected with a main shaft (5) of a compressor (4), an impeller (13) is arranged on the main shaft (5), the compressor (4) is respectively communicated with a high-pressure pipeline (6) and a low-pressure pipeline (7), a refrigerant is stored in the high-pressure pipeline (6), the cooling part comprises a condenser (8) and an evaporator (9), the high-pressure pipeline (6) is sequentially communicated with the condenser (8), the evaporator (9) is communicated, the low-pressure pipeline (7) is communicated with the evaporator (9), and an evaporator air inlet (10) and an evaporator air outlet (11) are arranged on the evaporator (9).

2. The engine exhaust energy recovery and reuse apparatus according to claim 1, characterized in that: an evaporator air outlet (11) of an evaporator (9) of the cooling part is communicated with an engine throttle valve (12) and/or an air outlet of an automobile air conditioning system.

3. The engine exhaust energy recovery and reuse apparatus according to claim 1 or 2, characterized in that: an evaporator air inlet (10) of an evaporator (9) of the cooling component is communicated with an air filter.

4. The engine exhaust energy recovery and reuse apparatus according to claim 1 or 2, characterized in that: the condenser (8) is provided with a cooling fan (14), and a liquid storage dryer (15) is arranged on the high-pressure pipeline (6) between the condenser (8) and the evaporator (9).

5. The engine exhaust energy recovery and reuse apparatus according to claim 4, characterized in that: and a thermostatic expansion valve (16) is arranged on a high-pressure pipeline (6) between the liquid storage dryer (15) and the evaporator (9) of the cooling part.

6. The engine exhaust energy recovery and reuse apparatus according to claim 5, characterized in that: one end of the low-pressure pipeline (7) close to the evaporator (9) is provided with a temperature sensing element (17), and the temperature sensing element (17) is connected with the thermostatic expansion valve (16).

7. The engine exhaust energy recovery and reuse apparatus according to claim 1 or 2, characterized in that: the main shaft (5) is connected with a shell of the compressor (4) through a bearing I (18) and a bearing II (19), a lubricating oil channel is arranged on the shell of the compressor (4), the lubricating oil channel passes through the bearing I (18) and the bearing II (19), one end of the lubricating oil channel is a lubricating oil inlet (20), and the other end of the lubricating oil channel is a lubricating oil outlet (21).

8. The engine exhaust energy recovery and reuse apparatus according to claim 1 or 2, characterized in that: the turbine compressor part comprises an exhaust turbine shell and a compressor shell, an exhaust inlet (1) and an exhaust outlet (2) are arranged on the exhaust turbine shell, and a main shaft (5) is installed in the compressor shell.

9. The engine exhaust energy recovery and reuse apparatus according to claim 1 or 2, characterized in that: the engine tail gas energy recycling device further comprises an exhaust bypass valve (22), and the exhaust bypass valve (22) is communicated with the high-pressure pipeline (6).

10. The engine exhaust energy recovery and reuse apparatus according to claim 1 or 2, characterized in that: the engine tail gas energy recycling device further comprises a speed reducer, the speed reducer is arranged on the turbine compressor part and comprises a speed reducer shell and a reduction gear, the exhaust turbine (3) is connected with the main shaft (5) of the compressor (4) through the reduction gear, and the speed reducer shell is communicated with the lubricating oil channel.