WO2013104091A1

WO2013104091A1 - Segmented volute casing with guide vanes

Info

Publication number: WO2013104091A1
Application number: PCT/CN2012/000429
Authority: WO
Inventors: 王航; 王艳霞; 袁道军; 朱智富; 李永泰; 宋丽华
Original assignee: Wang Hang; Wang Yanxia; Yuan Daojun; Zhu Zhifu; Li Yongtai; Song Lihua
Priority date: 2012-01-11
Filing date: 2012-03-31
Publication date: 2013-07-18
Also published as: CN102562186B; US20140321992A1; CN102562186A

Abstract

Disclosed is a segmented volute casing with guide vanes, comprising a turbine volute casing (1); a volute intake flow path and a volute diffusion path (4) provided within the turbine volute casing (1); and a volute intake port (2) in communication with the volute intake flow path and a volute air outlet (3) in communication with the volute diffusion path (4) respectively provided on the turbine volute casing (1). A left pneumatic baffle (5) and a right pneumatic baffle (6) are provided within the volute intake flow path, wherein the left pneumatic baffle (5) and the right pneumatic baffle (6) separate the volute intake flow path into a volute left intake outer flow path (7), a volute intake inner flow path (8) and a volute right intake outer flow path (9). An intake adjustment and control device is provided respectively at the position where the volute left intake outer flow path (7) and the volute right intake outer flow path (9) are adjacent to the volute intake port (2). The segmented volute casing with guide vanes improves the boost ratio when the engine is working at high speed, and satisfies the boost requirements within the full operating range of the engine.

Description

Segmented volute with guide vanes

The present invention relates to a segmented volute, and more particularly to a segmented volute with guide vanes that can work independently and work together to meet the performance requirements of various operating conditions of the engine, and belongs to the field of internal combustion engines. Background technique:

In recent years, with the increasingly strict emission regulations, there is an increasing demand for superchargers that can balance the performance of the engine. The variable-section turbocharger can effectively control the exhaust pressure of the engine. The supercharger and the engine achieve good performance matching under various working conditions and become the focus of research and development. However, in practical applications, the low-speed torque of the engine using the variable-section supercharger is greatly improved. The problem is that the engine's intake and exhaust negative pressure difference is very high, and the pumping loss is too high, resulting in low-speed engine operating conditions. The fuel consumption is high. Patent CN101694166A discloses a two-layer flow passage variable-section turbine control device, which comprises a turbine casing, and two inner and outer intake runners are arranged in the turbine casing, and the valve adjusts the opening of the valve through a valve control mechanism under high operating conditions in the engine. The degree of intake air entering the outer flow passage of the volute intake air is adjusted to realize the function of variable cross section. However, the structure has a limited increase in the boost ratio under high-speed engine conditions.

Therefore, it is desirable to design a segmented volute with guide vanes with simple structure and high reliability to meet the performance requirements of the engine under full working conditions, improve the intake air volume of the engine under low speed conditions, and reduce the low speed hysteresis of the engine. Sexuality, and can effectively utilize the exhaust energy of the engine under high-speed engine conditions, increase the intake air volume of the engine and effectively increase the boost ratio. Summary of the invention:

The problem to be solved by the present invention is to provide a method for effectively solving the hysteresis of the supercharger when the engine is in a low speed condition, and to improve the supercharging ratio when the engine is in a high speed condition, in order to solve the limitation of the variable section supercharger. A segmented volute with guide vanes that meets the boost requirements of the full operating range of the engine.

In order to solve the above problems, the present invention adopts the following technical solutions:

A segmented volute with guide vanes, including a turbine volute; The turbine volute is provided with a volute inlet flow passage and a volute expansion passage, and the turbine volute is respectively provided with a volute air inlet communicating with the volute intake flow passage and communicating with the volute diffusion passage a volute air outlet; a left side pneumatic partition and a right side pneumatic partition are arranged in the volute inlet flow passage;

The Γ: the side pneumatic baffle and the right pneumatic baffle partition the volute inlet flow passage into the volute left intake air flow passage, the volute intake air flow passage and the volute right intake air flow passage;

An air intake adjustment control device is respectively disposed at a position of the outer ventilating outer flow passage on the left side of the volute and the outer air intake outer flow passage on the right side of the volute near the vent inlet of the volute.

The following is a further improvement of the above-mentioned solution by the present invention - the air intake adjusting control device includes an air intake adjusting valve respectively installed at an air inlet of the left outer air intake passage of the volute and the outer air flow passage of the right side of the volute, The intake adjustment valve drive is connected with an intake adjustment control actuator;

When the engine is in the low speed range, the two intake regulating valves are closed at the same time, that is, the left outer air intake passage of the volute and the outer helium outer flow passage of the volute are simultaneously closed; the volute helium inner flow passage is separately Working status

When the engine is in the medium speed condition range, the intake adjustment valve installed at the intake port of the intake air passage on the left side of the volute is closed, and the intake air flow passage on the left side of the volute is closed, and the intake air flow on the right side of the volute The inner passage of the passage and the volute intake air are in working condition;

When the engine is in the high-speed working range, the two intake regulating valves are simultaneously opened, and the inner flow passage of the volute casing, the outer flow passage of the left side of the volute and the outer flow passage of the right side of the volute are simultaneously in working state.

Advance improvement:

The air inlet of the inner flow passage of the volute air inlet communicates with the air inlet of the volute, and the air inlet of the left outer air inlet of the volute and the air inlet of the outer air flow of the right side of the volute respectively The air inlets of the inner air passage of the shell inlet are connected.

Further improvement: the left outer air intake flow passage of the volute and the right outer air intake outer flow passage of the volute are respectively located on both sides of the inner flow passage of the volute casing and are arranged side by side in parallel.

Another improvement: The left outer air intake outer flow passage of the volute and the right outer air intake outer flow passage of the volute are respectively located at two sides of the inner flow passage of the volute casing, and the cross section of the left outer air intake passage of the volute is curved, and the outer portion thereof The end extends to the outside of the inner flow passage of the volute intake.

Further improvement: the cross-sectional area of the outer air intake passage on the left side of the volute is larger than the cross-sectional area of the outer air flow passage on the right side of the volute.

Further improvement: In order to ensure that the designed cross-section of the flow channel meets the design requirements of the A/R value, the sum of the cross-sectional areas of the left outer air intake passage and the right outer air passage of the right side of the volute is a volute The cross-sectional area of the inner flow passage of the intake air is 0.3-1.1 times.

In-mesh improvement: a vane-free nozzle is respectively disposed at a position of the outer ventilating outer flow passage on the left side of the volute, the outer side outer flow passage of the volute casing, and the inner flow passage of the volute casing near the volute diffusing passage.

Further improvement: a plurality of airfoil-type pneumatic guide vanes are uniformly arranged in a ring shape near the vaneless nozzle in the left outer air inlet passage of the volute.

Further improvement: one end of the guiding vane is integrally casted and connected with the inner wall of the outer side of the outer side of the volute, and the other end is integrally casted with the inner wall of the left side of the outer side of the outer side of the volute.

In-mesh improvement: a left outer flow passage control chamber is provided between the left outer air intake outer flow passage of the volute and the air inlet of the left outer air intake passage of the volute; the outer right outer flow passage of the volute A right outer flow channel control chamber is arranged between the air inlets of the outer air intake passage on the right side of the volute.

Further improvement: The intake air regulating valve installed at the intake port of the intake air flow passage on the left side of the volute is located in the left outer flow passage control room;

The intake air regulating valve installed at the intake port of the intake air flow passage on the right side of the volute is located in the right outer flow passage control chamber.

Step-by-step improvement: The upper outer runner control chamber and the right outer runner control chamber are respectively provided with upper outer runner end caps to achieve sealing of the intake air flow and limit of the intake air regulating valve.

The invention adopts the above scheme, the inner flow passage of the volute casing is a normally open intake flow passage, and the outer air inlet outer passage of the volute and the right outer air passage of the volute are open under the control of the intake regulation control actuator or Closed When the engine is in the low speed condition range, the intake air regulating wide door is driven by the air intake adjusting control actuator, and the outer air inlet outer flow passage of the volute and the outer air inlet outer flow passage of the volute are simultaneously closed, at this time, All the exhaust gas discharged from the engine only flows through the inner flow passage of the volute casing. Since the cross-sectional area of the inner flow passage of the volute casing is relatively small, the intake flow rate of the turbine impeller can be effectively increased, and the available energy in the exhaust gas can be fully utilized to increase. Turbine output work at low engine speed, boosting boost pressure, meeting the need for higher boost pressure at low engine speeds, improving engine low speed performance and reducing emissions, while increasing engine acceleration responsiveness and reducing The effect of pressure hysteresis.

When the engine is in the medium speed condition range, the intake regulating valve of the outer air intake passage of the right side of the volute is fully opened by the air intake adjusting control actuator, thereby opening the outer air inlet passage of the right side of the volute. At this time, the inner flow passage of the volute inlet and the outer flow passage of the right side of the volute work together, and the cross-sectional area of the intake passage of the volute becomes larger, which can effectively satisfy the intake air amount entering the turbine impeller at the medium rotation speed of the engine, and improve the engine discharge. The utilization of exhaust gas energy meets the supercharging requirements of the engine at medium speed.

When the engine is in the high-speed working condition, the intake regulating valve is fully opened under the driving of the intake adjusting control actuator, thereby opening the left outer air inlet and the outer air inlet of the volute. At this time, the inner flow passage of the volute inlet, the outer flow passage of the left side of the volute and the outer flow passage of the right side of the volute are simultaneously in working state. The high-speed exhaust gas discharged from the engine enters the inner flow passage of the volute casing, the outer flow passage of the left side of the volute and the outer flow passage of the right side of the volute. The cross-sectional area of the snail inlet flow passage increases, and the volute Guide vanes are provided at the vaneless nozzle of the left intake air flow passage, which can effectively guide the intake air flow into the turbine impeller at a suitable air flow angle, thereby improving the turbine intake efficiency and thereby increasing the boost ratio.

The structure of the turbine volute of the invention is basically the same as that of the ordinary supercharger volute structure, the structure is simple, the inheritance is good, the cost is low, and the engineering is easy and fast, the structure of the air intake adjusting device in the structure is simple, and the control method is easy to realize. , high reliability. The invention will be further described below in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS:

1 is a schematic cross-sectional view showing a segmented volute with a guide vane in Embodiment 1 of the present invention; Figure 2 is a schematic cross-sectional view of a 0-180 degree flow path of a segmented volute with a guide vane according to Embodiment 1 of the present invention; Figure 3 is a flow guide vane with a guide vane according to Embodiment 1 of the present invention; FIG. 4 is a schematic cross-sectional structural view of a 0-180 degree flow path of a segmented volute with a guide vane according to Embodiment 2 of the present invention; FIG. 5 is a schematic view of the present invention. FIG. 6 is a sectional structural view of the segmented volute with guide vanes in the low speed condition of the engine; FIG. 6 is a sectional volute with guide vanes in the engine of the second embodiment of the present invention. FIG. 7 is a schematic cross-sectional structural view of a segmented volute with a guide vane in a high speed condition of the engine according to Embodiment 2 of the present invention; FIG. 1 : Turbine volute 2- volute vent; 3- volute outlet; 4- volute diffuser; 5 - left pneumatic diaphragm; 6-right pneumatic diaphragm; 7- volute left intake air passage; 8- volute inlet flow passage; 9- volute right intake air passage; 10-intake regulating valve; 11-left outer runner control room; 12-right side Road control chamber; 13- intake air regulating valve mating surface; 14- outflow track cover; no leaves the nozzle 15; 16- guide vane; 17- cochlear inner wall of the left outer channel. detailed description:

Embodiment 1, as shown in FIG. 1 and FIG. 2, a segmented volute with a guide vane, comprising: a turbine volute 1 having a volute inlet flow passage and a volute inside the turbine volute 1 a diffuser passage 4, wherein the turbine volute 1 is respectively provided with a volute air inlet 2 communicating with the volute inlet flow passage and a volute air outlet 3 communicating with the volute diffusing passage 4; The volute inlet flow passage is provided with a left side pneumatic partition 5 and a right side pneumatic partition 6;

The left side pneumatic partition 5 and the right side pneumatic partition 6 divide the volute inlet flow passage into a volute left intake air flow passage 7, a volute intake inner flow passage 8 and a volute right intake air flow passage 9;

An air intake adjustment control device is respectively disposed at a position near the left outer air intake passage 7 of the volute and the outer air intake outer flow passage 9 of the volute near the volute intake port 2.

The air intake adjusting control device includes an air intake adjusting valve 10 installed at an air inlet of the left outer air intake runner 7 and the right outer air intake runner 9 of the volute, and the air intake adjusting valve 10 is driven. Connected with an air intake control actuator;

When the engine is in the low speed range, the two intake regulating valves 10 are simultaneously closed, that is, the left outer air intake passage 7 of the volute and the outer right outer air passage 9 of the volute are simultaneously closed; the volute intake air flow Road 8 is working alone;

When the engine is in the medium speed condition range, the intake air regulating valve 10 installed at the intake port of the intake air flow passage 7 on the left side of the volute is closed, and the air intake outer flow passage 7 on the left side of the volute is closed, and the right side of the volute The intake outer flow passage 9 and the volute intake inner flow passage 8 are in an operating state;

When the engine is in the high speed working condition, the two intake air conditioning wide doors 10 are simultaneously opened, the volute air intake inner flow passage 8, the volute left air intake outer flow passage 7 and the volute right outer air intake outer flow passage 9 simultaneously Is working.

The left pneumatic diaphragm 5 and the right pneumatic diaphragm 6 are integrally coupled with the turbine volute 1; the volute air inlet 2 is a single air inlet, and the volute intake inner flow passage 8 is advanced. The air port is in communication with the volute air inlet 2, and the air inlet of the left outer air intake passage 7 of the volute and the outer air inlet outer flow passage 9 of the volute is respectively connected with the inner flow passage 8 of the volute air intake The air inlets are connected.

The cross-sectional area of the left intake air flow passage 7 on the left side of the volute is larger than the cross-sectional area of the outer air flow passage 9 on the right side of the volute.

In order to ensure that the flow path section of the il is in accordance with the design requirements of the A/R value, the sum of the cross-sectional areas of the left outer air intake runner 7 and the right outer air intake runner 9 of the volute is the inside of the volute intake air. The cross-sectional area of the flow path 8 is 0.3-1.1 times. The left outer air inlet passage 7 and the right outer air passage 9 of the volute are respectively located at two sides of the inner flow passage 8 of the volute, and the cross section of the outer air passage 7 on the left side of the volute is an arc. The outer end extends to the outer side of the inner flow passage 8 of the volute casing.

A vaneless nozzle 15 is disposed at a position of the outer ventilating outer flow passage 7 on the left side of the volute, the outer side outer flow passage 9 on the right side of the volute, and the inner flow passage 8 of the volute casing near the volute diffusing passage 4, respectively.

As shown in Fig. 2 and Fig. 3, in the high-speed engine condition, in order to make full use of the exhaust energy of the engine, the airflow flowing through the outer airflow passage on the left side of the volute enters the turbine impeller at a suitable airflow angle to improve the intake efficiency. A plurality of airfoil-type air guide vanes 16 are uniformly disposed annularly in the outer air flow passage 7 on the left side of the volute near the vaneless nozzle 15 .

One end of the guide vane) 6 is integrally casted with the inner wall 17 of the left outer air inlet of the volute, and the other end is integrally formed with the left side pneumatic partition 5 on the inner side of the outer side of the outer flow passage 7 on the left side of the volute. Cast connection.

a left outer flow passage control chamber 11 is disposed between the left outer air intake outer flow passage 7 of the volute and the air inlet of the left outer air intake outer flow passage 7 of the volute; the outer right outer air passage 9 and the volute of the volute A right outer flow passage control chamber 12 is provided between the intake ports of the intake air outer passage 9 on the right side of the casing.

The intake air regulating valves 10 are installed in the left outer flow path control chamber 11 and the right outer flow path control chamber 12, respectively.

The intake regulating valve 10 is respectively provided with an intake adjusting wide door fitting surface 13 at an intake port of the intake outer flow passage 7 on the left side of the volute and an intake U of the right outer intake passage 9 of the volute, thereby realizing The intake air regulates the sealing of the wide door.

The left outer flow passage control chamber 11 and the right outer flow passage control chamber 12 are respectively provided with an outer flow passage upper end cover 14 to achieve sealing of the intake air flow and restriction of the intake air regulating valve.

Embodiment 2 As shown in Fig. 4, in the above-described Embodiment 1, the left outer air intake passage 7 and the right outer air flow passage 9 of the volute may be arranged side by side in parallel.

As shown in FIG. 5, when the engine is in the low speed range, the intake adjusting valve 10 is simultaneously closed by the intake adjusting control actuator, that is, the left outer side of the volute and the outer side of the volute The intake air flow passage 9 is simultaneously closed, and at this time, all the exhaust gas discharged from the engine flows only through the volute intake inner flow passage 8, Since the cross-sectional area of the inner flow passage 8 of the volute casing is relatively small, the intake flow rate of the turbine impeller can be effectively increased, the available energy in the exhaust gas can be fully utilized, the turbine output work at the low speed condition of the engine can be increased, and the supercharging pressure can be increased. Meets the need for higher boost pressure at low engine speeds, improves engine low speed performance and reduces emissions, while increasing engine acceleration responsiveness and reducing the effects of boost hysteresis.

As shown in Fig. 6, when the engine is in the medium speed range, the intake regulating valve 10 of the left outer air inlet passage 7 of the volute is in the off state, and the outer air inlet runner 7 on the left side of the volute does not work. The intake regulating valve 10 of the right outer side air flow passage 9 of the volute is opened under the driving of the air intake adjusting control actuator, thereby opening the outer air inlet outer flow passage 9 of the volute, and at this time, the volute enters The gas inner flow passage 8 and the outer air intake outer flow passage 9 of the volute casing work together, and the cross-sectional area of the volute intake air passage passage becomes large, which can effectively satisfy the intake air flow rate entering the turbine impeller at a medium engine speed, and improve the utilization of the exhaust gas energy of the engine. Rate, to meet the supercharging requirements of the engine at medium speed.

As shown in FIG. 7, when the engine is in the high speed working condition range, the two intake air regulating valves 10 are simultaneously opened under the action of the intake air conditioning control actuator, thereby the outer air intake passage 7 on the left side of the volute. The outer flow passage 9 on the right side of the volute is opened. At this time, the inner flow passage 8 of the volute intake, the outer flow passage 7 of the left side of the volute, and the outer flow passage 9 of the right side of the volute are simultaneously in an operating state. The high-speed exhaust gas discharged from the engine enters the volute intake inner flow passage 8, the volute left outer intake outer flow passage 7 and the volute right outer intake outer flow passage 9, respectively, and the outer flow passage 7 on the left side of the volute The vaneless nozzle 16 is provided with a guide vane 16 which can effectively guide the intake air flow into the turbine impeller at a suitable air flow angle, thereby improving the turbine intake efficiency.

According to the above aspect of the invention, the inner flow passage of the volute casing is a constant intake air passage, and the outer air inlet outer passage of the volute and the right outer air passage of the spiral outer casing are under the control of the air intake adjustment control actuator. Open or closed state. By adjusting the intake cross-sectional area of the volute, it can meet the intake air volume of the volute inlet flow passage under different working conditions, realize the function of the variable-section turbine, and meet the supercharging demand under the full working condition of the engine. The volute structure design is based on the improvement of the traditional volute, the structure is simple, the inheritance is good, and the product is easy to be engineered.

Claims

Rights request

1. A segmented volute with guide vanes, comprising:

a turbine volute (1), wherein the turbine volute (1) is provided with a volute inlet flow passage and a volute expansion passage (4), and the turbine volute (1) is respectively provided with a volute intake flow a volute inlet (2) connected to the volute and a vent outlet (3) communicating with the volute diffuser passage (4);

It is characterized by:

The volute inlet flow passage is provided with a left side pneumatic partition (5) and a right side pneumatic partition (6);

The left pneumatic diaphragm (5) and the right pneumatic diaphragm (6) partition the volute intake flow passage into a volute left intake air flow passage (7), a volute intake inner flow passage (8) and The outer ventilating outer flow passage of the volute (9); the outer venting outer flow passage (7) of the volute and the outer venting outer flow passage (9) of the volute close to the volute inlet (2) respectively It has an air intake control device.

2. The segmented volute with a guide vane according to claim 1, wherein: said intake adjustment control device comprises an outer intake outer flow passage (7) and a volute right side respectively mounted on the left side of the volute An intake adjusting valve (10) at an intake port of the side intake outer flow passage (9), wherein the intake adjusting valve (10) is connected to an intake adjusting control actuator;

When the engine is in the low speed range, the two intake regulating valves (10) are simultaneously closed, that is, the left outer air intake passage (7) of the volute and the outer air inlet outer flow passage (9) of the volute are simultaneously closed; The inner flow passage (8) of the volute intake is in a working state alone;

When the engine is in the medium speed range, the intake adjustment valve (10) installed at the intake port of the intake outer flow passage (7) on the left side of the volute is closed, and the intake outer flow passage (7) on the left side of the volute is closed. State, the outer ventilating outer flow passage (9) of the volute and the inner flow passage (8) of the volute intake are in operation;

When the engine is in the high speed range, the two intake adjustment valves (10) are simultaneously opened, the volute intake inner flow passage (8), the volute left intake air passage (7) and the volute right intake. The outer flow path (9) is in working condition at the same time.

3. The segmented volute with a guide vane according to claim 2, wherein: An intake port of the volute intake inner flow passage (8) communicates with a volute intake port (2), and the volute left intake air passage (7) and the volute right intake The intake ports of the outer flow passage (9) are respectively connected to the intake ports of the inner flow passage (8) of the volute intake.

The segmented volute with a guide vane according to claim 3, wherein: the left outer air intake outer flow passage (7) and the outer side outer air intake outer flow passage (9) of the volute are respectively It is located on both sides of the inner flow passage (8) of the volute casing and arranged side by side in parallel.

The segmented volute with a guide vane according to claim 3, wherein: the left outer air intake outer flow passage (7) and the outer right outer air intake outer passage (9) of the volute are respectively Located on both sides of the inner flow passage (8) of the volute casing, the left outer air inlet passage (7) has an arc-shaped cross section, and the outer end extends to the inner flow passage (8) of the volute intake air. Outside.

The segmented volute with a guide vane according to claim 4 or 5, wherein: the cross-sectional area of the left outer air intake passage (7) of the volute is larger than the right side of the volute The cross-sectional area of the gas flow path (9).

The segmented volute with a guide vane according to claim 6, characterized in that - the left outer intake outer flow passage (7) of the volute and the right outer air intake outer passage (9) of the volute The sum of the cross-sectional areas is 0.3-1.1 times the cross-sectional area of the inner flow passage (8) of the volute intake.

The segmented volute with a guide vane according to claim 7, wherein: the left outer air inlet passage (7) of the volute, the outer air inlet outer flow passage (9) of the volute and The volute inlet inner flow passage (8) is provided with a vaneless nozzle (15) at a position close to the volute diffuser passage (1).

The segmented volute with a guide vane according to claim 8, wherein: the outer ventilating outer flow passage (7) of the volute is annularly arranged adjacent to the no-blade nozzle (15). There are several airfoil pneumatic guide vanes (16).

10. The segmented volute with a guide vane according to claim 9, characterized in that - one end of the guide vane (16) is integrally cast with the inner wall of the outer flow passage (17) of the left side of the volute Connected, the other end is connected to the left side pneumatic partition (5) on the left side of the outer side of the volute (7). ^

The segmented volute with a guide vane according to claim 10, characterized in that: the left outer air inlet outer flow passage (7) of the volute and the left outer air intake outer flow passage (7) of the volute A left outer flow channel control chamber (11) is disposed between the air inlets; and a right outer air intake outer flow passage (9) of the volute is disposed between the air inlet of the outer air intake outer flow passage (9) of the right side of the volute Right outer flow channel control room (12).

The segmented volute with a guide vane according to claim 11, characterized in that: an intake regulating valve (10) installed at an intake port of the intake outer flow passage (7) on the left side of the volute Located in the left outer flow channel control room (11);

The intake regulating valve (10) installed at the intake port of the intake outer flow passage (9) on the right side of the volute is located in the right outer flow path control chamber (12).

The segmented volute with a guide vane according to claim 12, wherein: the left outer flow channel control chamber (11) and the right outer flow channel control chamber (12) are respectively provided with an outflow Upper end cap

(14), to achieve the sealing of the intake air flow and the limit of the intake air regulating valve.