CN103291433A - Triaxial synchronous type variable exhaust branch reducing rate system - Google Patents

Abstract

A three-axis synchronous exhaust branch pipe necking rate variable system in the technical field of mechanical design, including a volume chamber, an elastic component, a rotating body, a partition, a rotating shaft, a rotating plate and a chain, and the longitudinal section of the volume chamber is a ring shape, the longitudinal section of the rotating body is arc-shaped, one end of the third connecting shaft passes through the volume chamber and is embedded on the side wall of the volume chamber, and one end of the first rotation shaft passes through the first exhaust branch pipe and is embedded in the first on the side wall of the exhaust manifold. When the engine intake pipe pressure is high, the rotating body drives the rotating plate to rotate counterclockwise, the outlet area of the exhaust branch pipe is relatively large, and the engine pumping loss is small; when the engine intake pipe pressure is low, the rotating body drives the rotating plate clockwise Rotating, the outlet area of the exhaust branch pipe is relatively small, the pulse energy can be fully utilized, and the available energy before the turbine is more. The invention is reasonable in design and simple in structure, and is suitable for a turbocharging system with one turbine inlet and the turbine side-mounted.

Description

Three-axis Synchronous Exhaust Branch Pipe Shrinkage Variable System

technical field

The invention relates to a turbocharger system in the technical field of mechanical design, in particular to a three-axis synchronous exhaust branch pipe shrinkage variable system.

Background technique

With the development of society and the improvement of environmental protection requirements, the application of engine supercharging technology is becoming more and more extensive. Most of the engines with medium and high power adopt turbocharging technology to improve power and reduce fuel consumption. The two basic types of turbocharging systems are constant pressure supercharging system and pulse supercharging system. Constant pressure supercharging system, each cylinder shares an exhaust pipe with a large volume, the structure of the exhaust pipe system is relatively simple, the pressure in the exhaust pipe is basically kept constant, the pressure is only related to the load and speed of the engine, different cylinder numbers The supercharging system of the diesel engine can be designed uniformly. The constant pressure supercharging system has less pumping loss, higher turbine efficiency and better performance under high-speed conditions; however, it cannot fully utilize the exhaust pulse energy under low-speed conditions. Pulse supercharging system, according to the firing sequence of each cylinder, connects two cylinders or three cylinders that do not interfere with the exhaust with the same exhaust pipe. The diameter of the exhaust pipe system is small, and the exhaust pulse energy can be fully utilized , the low-speed working condition and the transient working condition have better performance; but in the high-speed working condition, the pumping loss is larger. It can be seen that if the volume of the exhaust pipe of an engine can change with the change of working conditions, the volume of the exhaust pipe will be enlarged under high-speed conditions, and the volume of the exhaust pipe will be reduced under low-speed conditions. ideal. On the premise that the volume of the exhaust pipe remains unchanged, by changing the outlet area of the exhaust branch pipe, it is also possible to achieve both high and low engine speed conditions. In the low-speed working condition, the outlet area of the exhaust branch pipe becomes smaller, and the available energy before the turbine is more; in the high-speed working condition, the outlet area of the exhaust branch pipe becomes larger, and the pumping loss is smaller, which is also ideal.

After searching the existing technical literature, it is found that Chinese patent number ZL201020532937.0, patent name: turbocharger device with variable exhaust pipe outlet area, this patent technology provides a device with continuously variable exhaust pipe outlet area , can better take into account the high and low speed conditions of the engine; but the change of the outlet area of the exhaust pipe is realized by the rotation of the rotary handle, which requires adding a special control mechanism to control the rotation of the rotary handle, so that Make the booster system structure more complicated.

Contents of the invention

The present invention aims at the deficiencies of the above-mentioned prior art, and provides a three-axis synchronous exhaust branch pipe shrinking rate variable system, so that the outlet area of the exhaust branch pipe can be adjusted by itself, and the high and low speed conditions of the engine can be better taken into account. Moreover, the structure is simple and does not require a special control mechanism.

The present invention is achieved through the following technical proposals, the present invention comprises a compressor intake pipe, a compressor, an engine intake pipe, an engine, a first exhaust branch pipe, a second exhaust branch pipe, an exhaust pipe, a turbine, and a turbine exhaust pipe , connecting shaft, connecting pipe, volume cavity, elastic component, rotating body, partition, third rotating shaft, first rotating shaft, first rotating plate, second rotating shaft, second rotating plate and chain, compressor access The gas ports are respectively connected with the air outlet of the compressor intake pipe and the air intake of the engine intake pipe, the engine air intake is connected with the exhaust port of the engine intake pipe, the air intake of the first exhaust branch pipe, the second row The air inlet of the air branch pipe is connected with the exhaust duct of the engine respectively, the air outlet of the first exhaust branch pipe and the air outlet of the second exhaust branch pipe are connected with the exhaust pipe, and the air inlet and outlet of the turbine are connected with the exhaust pipe respectively. The air outlet of the exhaust pipe of the turbine is connected to the air inlet of the turbine exhaust pipe. The compressor and the turbine are connected coaxially through the connecting shaft. The cross-section of the body is rectangular, the axis of the third connecting shaft coincides with the axis of the volume cavity, one end of the third connection shaft passes through the volume cavity and is embedded on the side wall of the volume cavity, and the partition plate is installed in the volume cavity and connected with the volume cavity. The inner wall surface of the volume chamber is consolidated into one body, the upper end surface of the partition is in sealing contact with the third connecting shaft, the rotating body is installed in the volume chamber and is in sealing contact with the inner wall surface of the volume chamber, and the rotating body is connected to the third connection shaft in the volume chamber The shaft is consolidated into one body, the left end surface of the partition is connected with the rotating body through elastic parts, one end of the connecting pipe is connected with the volume cavity on the right side of the partition, the other end of the connecting pipe is connected with the engine intake pipe, the first row The cross-section of the air branch pipe is rectangular, and one end of the first rotating shaft passes through the first exhaust branch pipe and is inlaid on the side wall of the first exhaust branch pipe. The first rotating plate is installed in the first exhaust branch pipe and The first rotation shaft in the exhaust branch pipe is consolidated into one body, the cross section of the second exhaust branch pipe is rectangular, and one end of the second rotation shaft passes through the second exhaust branch pipe and is inlaid on the side wall of the second exhaust branch pipe , the second rotating plate is installed in the second exhaust branch pipe and consolidated with the second rotating shaft in the second exhaust branch pipe, the other end of the third rotating shaft, the other end of the first rotating shaft, the second rotating The other end of the shaft is connected by a chain.

Further, in the present invention, the elastic component is a spring, and both the first rotating plate and the second rotating plate are flat plates.

In the working process of the present invention, the rotating body can rotate in the volume chamber, the rotating body is consolidated with the third rotating shaft, the first rotating shaft is consolidated with the first rotating plate, the second rotating shaft is connected with the second The rotating plates are fixed together; when the rotating body rotates, the chain drives the first rotating plate and the second rotating plate to rotate synchronously and in the same direction. When the pressure in the intake pipe of the engine is high, the pressure in the volume cavity on the right side of the partition is also high, and the rotating body drives the first rotating plate and the second rotating plate to rotate counterclockwise and compress the elastic parts, so that the first exhaust pipe , The shrinkage rate of the second exhaust branch pipe becomes larger, and the pumping loss of the engine is smaller; when the pressure in the engine intake pipe is low, the pressure in the volume cavity on the right side of the partition is also low, and the elastic effect of the elastic component Next, the rotating body drives the first rotating plate and the second rotating plate to rotate clockwise, so that the shrinkage ratio of the first exhaust pipe and the second exhaust branch pipe becomes smaller, the pulse energy can be fully utilized, and the available energy before the turbine is more .

Compared with the prior art, the present invention has the following beneficial effects: the present invention is reasonable in design and simple in structure, and is suitable for a turbocharging system with one turbine inlet and the turbine is placed on the side, which can take into account the high and low speed conditions of the engine, and It can make the supercharging system not need a special control mechanism for the outlet area of the exhaust branch pipe.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of A-A section among Fig. 1;

Fig. 3 is the structural representation of B-B section among Fig. 1;

Fig. 4 is the structural representation of C-C section among Fig. 1;

Fig. 5 is the structural representation of D-D section among Fig. 1;

Fig. 6 is the structural representation of chain connection among the present invention;

Among them: 1. Compressor intake pipe, 2. Compressor, 3. Engine intake pipe, 4. Engine, 5. First exhaust branch pipe, 6. Second exhaust branch pipe, 7. Exhaust pipe, 8. Turbine, 9. Turbine exhaust pipe, 10. Connecting shaft, 11. Connecting pipe, 12. Volume cavity, 13. Elastic component, 14. Rotating body, 15 Partition plate, 16. Third rotating shaft, 17. First rotating shaft, 18, the first rotating plate, 19, the second rotating shaft, 20, the second rotating plate, 21, the chain.

Detailed ways

The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is based on the technical solution of the present invention, and provides detailed implementation methods and specific operating procedures, but the scope of protection of the present invention is not limited to the following embodiments. .

Example

As shown in Figures 1 to 6, the present invention includes: a compressor intake pipe 1, a compressor 2, an engine intake pipe 3, an engine 4, a first exhaust branch pipe 5, a second exhaust branch pipe 6, and an exhaust pipe 7 , turbine 8, turbine exhaust pipe 9, connecting shaft 10, connecting pipe 11, volume cavity 12, elastic member 13, rotating body 14, partition 15, third rotating shaft 16, first rotating shaft 17, first rotating plate 18, the second rotating shaft 19, the second rotating plate 20 and the chain 21, the air inlet and outlet of the compressor 2 are respectively connected with the air outlet of the compressor air inlet pipe 1 and the air inlet of the engine air inlet pipe 3, and the air inlet of the engine 4 The port is connected with the exhaust port of the engine intake pipe 3, the air inlet of the first exhaust branch pipe 5, and the air inlet of the second exhaust branch pipe 6 are respectively connected with the exhaust passage of the engine 4, and the first exhaust branch pipe The gas outlet of 5 and the gas outlet of the second exhaust branch pipe 6 are all connected with exhaust pipe 7, and the air inlet and outlet of turbine 8 are connected with the gas outlet of exhaust pipe 7 and the air inlet of turbine exhaust pipe 9 respectively, The compressor 2 and the turbine 8 are connected coaxially through the connecting shaft 10, the longitudinal section of the volume chamber 12 is circular, the longitudinal section of the rotating body 14 is arc-shaped, and the cross sections of the volume chamber 12 and the rotating body 14 are rectangular. The axis of the third connection shaft 16 coincides with the axis of the volume chamber 12, and one end of the third connection shaft 16 passes through the volume chamber 12 and is embedded on the side wall of the volume chamber 12. The inner wall surface of the cavity 12 is consolidated into one body, the upper end surface of the partition plate 15 is in sealing contact with the third connecting shaft 16, the rotating body 14 is installed in the volume cavity 12 and is in sealing contact with the inner wall surface of the volume cavity 12, the rotating body 14 is in sealing contact with the volume cavity The third connecting shaft 16 in the chamber 12 is consolidated into one body, the left end surface of the partition 15 is connected with the rotating body 14 through the elastic member 13, and one end of the connecting pipe 11 communicates with the volume chamber 12 on the right side of the partition 15, and connects The other end of pipe 11 is connected with engine intake pipe 3, and the cross section of first exhaust branch pipe 5 is rectangular, and one end of first rotating shaft 17 passes through first exhaust branch pipe 5 and is embedded in the first exhaust branch pipe 5. On the side wall, the first rotating plate 18 is installed in the first exhaust branch pipe 5 and consolidated with the first rotating shaft 17 in the first exhaust branch pipe 5. The cross section of the second exhaust branch pipe 6 is rectangular. One end of the second rotating shaft 19 passes through the second exhaust branch pipe 6 and is embedded on the side wall of the second exhaust branch pipe 6. The second rotating plate 20 is installed in the second exhaust branch pipe 6 and connected with the second exhaust branch pipe. The second rotating shaft 19 in 6 is consolidated into one body, the other end of the third rotating shaft 16, the other end of the first rotating shaft 17, and the other end of the second rotating shaft 19 are connected by a chain 21, and the elastic member 13 is a spring , the first rotating plate 18 and the second rotating plate 20 are both flat plates.

During the working process of the present invention, the rotating body 14 can rotate in the volume cavity 12, the rotating body 14 is consolidated with the third rotating shaft 16, the first rotating shaft 17 is consolidated with the first rotating plate 18, and the second The two rotating shafts 19 and the second rotating plate 20 are fixed together; when the rotating body 14 rotates, the chain 21 drives the first rotating plate 18 and the second rotating plate 20 to rotate synchronously and in the same direction. When the pressure in the engine intake pipe 3 is high, the pressure in the volume cavity 12 on the right side of the partition 15 is also high, and the rotating body 14 drives the first rotating plate 18 and the second rotating plate 20 to rotate counterclockwise and compress the elastic member 13, Thereby the shrinkage rate of the first exhaust pipe 5 and the second exhaust branch pipe 6 becomes large, and the pumping loss of the engine 4 is small; The internal pressure of 12 is also low. Under the elastic action of the elastic member 13, the rotating body 14 drives the first rotating plate 18 and the second rotating plate 20 to rotate clockwise, so that the first exhaust pipe 5 and the second exhaust branch pipe 6 The shrinkage rate becomes smaller, the pulse energy can be fully utilized, and the available energy before the turbine 8 is more.

Claims (2)

1. A three-axis synchronous exhaust branch pipe shrinkage ratio variable system, including compressor intake pipe (1), compressor (2), engine intake pipe (3), engine (4), and first exhaust branch pipe (5), the second exhaust branch pipe (6), exhaust pipe (7), turbine (8), turbine exhaust pipe (9) and connecting shaft (10), the inlet and outlet of the compressor (2) are respectively connected with the compressor The air outlet of the engine intake pipe (1) is connected with the air intake of the engine intake pipe (3), the air intake of the engine (4) is connected with the exhaust port of the engine intake pipe (3), and the first exhaust branch pipe The air inlet of (5) and the air inlet of the second exhaust branch pipe (6) are respectively connected with the exhaust passage of the engine (4), and the air outlet of the first exhaust branch pipe (5) and the second exhaust branch pipe The air outlets of (6) are all connected with the exhaust pipe (7), and the air inlet and outlet of the turbine (8) are respectively connected with the air outlet of the exhaust pipe (7) and the air inlet of the turbine exhaust pipe (9), The compressor (2) and the turbine (8) are coaxially connected through the connecting shaft (10), and it is characterized in that it also includes a connecting pipe (11), a volume chamber (12), an elastic component (13), a rotating body (14), Partition plate (15), third rotating shaft (16), first rotating shaft (17), first rotating plate (18), second rotating shaft (19), second rotating plate (20) and chain (21) , the longitudinal section of the volume chamber (12) is circular, the longitudinal section of the rotating body (14) is arc-shaped, the cross sections of the volume chamber (12) and the rotating body (14) are both rectangular, and the third connecting shaft ( The axis of 16) coincides with the axis of the volume chamber (12), and one end of the third connecting shaft (16) passes through the volume chamber (12) and is inlaid on the side wall of the volume chamber (12), and the partition (15) is installed on The volume chamber (12) is integrated with the inner wall surface of the volume chamber (12), the upper end surface of the partition (15) is in sealing contact with the third connecting shaft (16), and the rotating body (14) is installed in the volume chamber ( 12) and is in sealing contact with the inner wall of the volume cavity (12), the rotating body (14) is consolidated with the third connecting shaft (16) in the volume cavity (12), and the left end surface of the partition (15) passes through The elastic part (13) is connected with the rotating body (14), one end of the connecting pipe (11) is connected with the volume chamber (12) on the right side of the partition (15), and the other end of the connecting pipe (11) is connected with the engine intake pipe (3) are connected, the cross section of the first exhaust branch pipe (5) is rectangular, and one end of the first rotating shaft (17) passes through the first exhaust branch pipe (5) and is embedded in the first exhaust branch pipe (5) On the side wall, the first rotating plate (18) is installed in the first exhaust branch pipe (5) and consolidated with the first rotating shaft (17) in the first exhaust branch pipe (5), the second row The cross section of the air branch pipe (6) is rectangular, and one end of the second rotating shaft (19) passes through the second exhaust branch pipe (6) and is inlaid on the side wall of the second exhaust branch pipe (6). The second rotating plate (20) Installed in the second exhaust branch pipe (6) and consolidated with the second rotation shaft (19) in the second exhaust branch pipe (6), the third rotation shaft (16) The other end, the other end of the first rotating shaft (17) and the other end of the second rotating shaft (19) are connected by a chain (21). 2. The three-axis synchronous exhaust branch pipe shrinkage variable system according to claim 1, characterized in that the elastic member (13) is a spring, the first rotating plate (18), the second rotating plate (20) All are flat.

Images