CN202391494U - Double-channel variable-section volute device with guide vane - Google Patents

Abstract

The utility model discloses a double-channel variable-section volute device with guide blades, which comprises a volute, and the volute is provided with a volute air inlet, a volute air outlet, a volute air intake channel and a volute pressure diffuser channel; the volute inlet flow channel is provided with a pneumatic partition, and the aerodynamic partition divides the volute inlet flow channel into the volute intake inner flow channel and the volute intake outer flow channel; the volute intake outer flow channel is located at the volute inlet The circumferential outer side of the air inner flow channel; the volute air intake outer flow channel and the volute air intake inner flow channel are respectively provided with vaneless nozzles near the volute diffuser channel; The ring is evenly equipped with several airfoil-shaped aerodynamic guide vanes. For the pulse booster system, the inner flow channel works in the low-speed area of the engine, which can make better use of the pulse energy. At high speed, the outer flow channel does not need to be divided into two flow channels. , enough energy can be obtained with one runner, which further simplifies the product structure and reduces the product weight.

Description

A double-channel variable-section volute device with guide vanes

technical field

The utility model relates to a dual-channel variable-section volute device, in particular to a dual-channel variable-section volute device with guide blades for improving supercharger efficiency, and belongs to the field of internal combustion engine supercharging.

Background technique

In recent years, with the increasingly stringent requirements of emission regulations, people's demand for turbochargers that take into account both high and low speed performance of the engine has become more and more intense. The dual-channel variable cross-section turbocharger that meets the performance requirements of the engine in the full range of operating conditions has become The focus of research on the internal combustion engine industry.

As shown in Figure 1, the patent CN200910016706.6 discloses a structure of a turbocharger double-layer channel variable-section turbine embodiment 1, including a volute 1, a volute diffuser channel 2, a power turbine 3, and the volute 1 The cavity is provided with a partition wall 4 for the volute inlet flow passage, and the partition wall 4 for the volute inlet flow passage divides the cavity of the volute 1 into the volute inlet outer flow passage 5 and the volute connected with the volute diffuser passage 2 The air intake inner flow channel 6, the volute air intake outer flow channel 5 is set on the outside of the volute air intake inner flow channel 6, the volute air intake inner flow channel 6 is a single flow channel, and the volute air intake outer flow channel 5 is provided with The flow passage ribs 7 and the volute intake flow passage partition wall 4 are integrally connected with the casing of the volute 1 through the flow passage ribs 7 . The volute air intake inner channel 6 is used in the full range of engine operating conditions, and the volute air intake outer channel 5 controls the opening and flow of the volute air intake outer channel 5 by adjusting the axial movement of the structure in the engine's medium and high speed range The area realizes the function of variable section turbine.

As shown in Figure 2, the patent CN200910016706.6 discloses a structure of embodiment 2 of a double-layer channel variable-section turbine of a turbocharger, including a volute 1, a volute diffuser channel 2, a power turbine 3, and the volute 1 The cavity is provided with a partition wall 4 for the volute inlet flow passage, and the partition wall 4 for the volute inlet flow passage divides the cavity of the volute 1 into the volute inlet outer flow passage 5 and the volute connected with the volute diffuser passage 2 The air intake inner flow channel 6 and the volute air intake outer flow channel 5 are set on the outside of the volute air intake inner flow channel 6. 4 is integrally connected with the casing of the volute 1 through the channel rib 7 . The volute air inlet inner flow channel is provided with a pulse inner flow channel rib 8, and the pulse inner flow channel rib 8 divides the volute air intake inner flow channel into a left pulse inner flow channel 9 and a right pulse inner flow channel 10 . The pulse channel makes full use of the energy of the exhaust system under the medium and low speed conditions of the engine. In the middle and high speed range of the engine, the opening and flow area of the volute inlet outer channel 5 are controlled by adjusting the axial movement of the structure, so as to realize the function of the variable-section turbine.

The above-mentioned patents have completed the development of double-layer volute inlet runners and pulse supercharged variable-section turbines for the needs of turbocharger variable-section turbines, effectively utilizing the exhaust energy of the engine, and taking into account the low-speed and high-speed conditions of the engine. boost demand. However, the designed structure: the runner ribs only play the role of fixed support connection, in addition, there will be a certain wall friction loss on the wall of the runner ribs, and it does not have the characteristics of improving the airflow characteristics.

Utility model content

The problem to be solved by the utility model is to provide a double-channel variable cross-section with guide vanes that reduces the wall friction loss caused by the flow channel ribs, and further improves the efficiency of the supercharger through the guide vanes on the intake air flow. Volute device.

In order to solve the above problems, the utility model adopts the following technical solutions:

A double-channel variable-section volute device with guide vanes, comprising a volute, the volute is provided with a volute air inlet, a volute air outlet, a volute inlet flow channel, and a volute diffusion channel;

The volute air intake passage is provided with a pneumatic partition, and the aerodynamic partition divides the volute intake passage into a volute intake inner passage and a volute intake outer passage;

The volute air intake outer flow channel is located on the circumferential outer side of the volute air intake inner flow channel;

The positions of the volute air intake outer flow channel and the volute air intake inner flow channel close to the volute diffuser channel are respectively provided with vaneless nozzles;

A plurality of airfoil-shaped aerodynamic guide vanes are evenly arranged in a circular shape near the vaneless nozzle in the air intake outer flow channel of the volute.

Below is the further improvement of the utility model to above-mentioned scheme:

One end of the guide vane is integrally casted and connected to the inner wall of the volute inlet outer flow channel, and the other end is integrally casted and connected to the inner wall of the aerodynamic partition on the side of the volute inlet outer flow channel.

The guide vane is fixed on the inlet outer flow channel of the volute through the casting process. On the one hand, it reduces the impact of the high-speed exhaust gas flow on the turbine impeller and prevents the turbine impeller from vibrating. On the other hand, by designing guide vanes fixed on the volute case, the aerodynamic baffle and the volute case are cast together to play the role of fixed connection.

Further improvement: the air inlet of the volute air inlet inner flow channel is connected with the volute air inlet, and the air inlet of the volute air inlet outer flow channel is connected with the air inlet of the volute air inlet inner flow channel .

Further improvement: a volute intake outer runner control room is provided between the volute inlet outer runner and the inlet of the volute inlet outer runner, and a matching The end cover of the volute inlet outer flow channel.

Further improvement: an air intake regulating valve is provided in the control room of the volute air intake outer flow channel, and a matching surface matching the intake air regulating valve is provided on the position corresponding to the air intake regulating valve on the pneumatic partition, and the air intake regulating valve Driven by the air intake adjustment control device, the valve is in an open and closed state, thereby realizing the working and non-working states of the volute air intake outer flow channel.

The space of the volute air intake outer channel control chamber limits the opening angle of the air intake regulating valve, thereby limiting the flow of exhaust gas entering the volute air intake outer channel.

The purpose of the design of the mating surface is to ensure that when the air intake regulating valve is in a closed state, the air intake regulating valve and the volute air intake outer flow channel are closely matched to prevent the engine from entering the volute air intake inner flow channel under low engine conditions. The air flow flows into the air intake outer channel of the volute, resulting in a decrease in the air intake efficiency.

Further improvement: in order to be suitable for a constant-pressure supercharging system, such as a four-cylinder engine, the inlet of the volute is a single inlet.

Another improvement: in order to be suitable for a pulse supercharging system, such as a six-cylinder engine, the air inlet of the volute can also be double air inlets: including an air inlet on the left side of the volute and an air inlet on the right side of the volute.

Further improvement: the volute air intake inner flow channel is provided with a pulse inner flow channel rib, and the pulse inner flow channel rib divides the volute air intake inner flow channel into a left pulse inner flow channel and a right pulse inner flow channel Runner;

The left pulse inner flow channel and the right pulse inner flow channel are respectively connected with the left air inlet of the volute and the right air inlet of the volute.

Further improvement: the cross-section of the ribs of the pulse inner flow channel is tapered, and the ribs of the pulse inner flow channel are integrally cast and connected with the pneumatic partition.

Further improvement: the air inlet of the left pulse inner flow passage and the air inlet of the right pulse inner flow passage communicate with the left air inlet of the volute and the right air inlet of the volute respectively;

The left air inlet of the volute air inlet outer flow passage and the right air inlet of the volute air inlet outer flow passage communicate with the air inlet of the left pulse inner flow passage and the air inlet of the right pulse inner flow passage respectively .

The utility model adopts the above-mentioned scheme, when the engine is in a low-speed working condition, the air intake regulating valve is in a closed state driven by the air intake regulating valve control device, and the outer flow channel of the air intake of the volute is closed and is in a non-working state. At this time, the exhaust gas flow discharged from the engine only flows through the inlet flow channel of the volute, thereby driving the turbine to do work.

When the engine is in medium and high-speed working conditions, the air intake regulating valve is in an open state driven by the air intake regulating valve control device, and the volute air intake outer flow channel is opened and is in a working state. At this time, the exhaust gas discharged from the engine is driven by the aerodynamic partition, respectively flows through the volute intake inner flow channel and the volute intake outer flow channel, and the airflow flowing through the volute inner flow channel drives the turbine to do work, and at this time The airflow flowing through the volute intake outer channel is induced by the uniformly distributed fixed guide vanes to drive the turbine to do work effectively at an appropriate airflow angle. The set guide vanes can induce the exhaust gas flow to enter the turbine uniformly and at a suitable air flow angle, reduce the impact loss of the high-speed intake air flow on the turbine impeller, improve the intake efficiency, and thus effectively improve the efficiency of the turbine.

By setting fixed and evenly distributed guide vanes at the vaneless nozzle position of the dual-channel volute inlet outer flow channel, for the pulse booster system, the inner flow channel works in the low-speed area of the engine, which can make better use of the pulse energy. , the outer flow channel can not be divided into two flow channels, and enough energy can be obtained by using one flow channel, which further simplifies the product structure and reduces the product weight.

To sum up, the volute structure in the utility model is basically the same as the conventional dual-channel turbocharger volute structure, which ensures that the connection with the engine exhaust pipeline remains unchanged, the structure is simple, the inheritance is good, the cost is low, It is easy and fast to realize engineering, and the air intake regulating device in the utility model has a simple structure, a control method is easy to realize, and the reliability is high.

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Description of drawings

Accompanying drawing 1 is the structural representation of turbocharger double-layer channel variable cross-section turbine embodiment 1 in the background technology;

Accompanying drawing 2 is the structural representation of turbocharger double-layer channel variable cross-section turbine embodiment 2 in the background technology;

Accompanying drawing 3 is the structural schematic diagram of the dual-channel variable-section volute with guide vanes in Embodiment 1 of the present utility model;

Accompanying drawing 4 is the axial sectional view of the dual-channel variable-section volute with guide vanes in Embodiment 1 of the utility model;

Accompanying drawing 5 is the radial sectional view of the dual-channel variable-section volute with guide vanes in Embodiment 1 of the present utility model;

Accompanying drawing 6 is the structural schematic diagram of the dual-channel variable-section volute with guide vanes in Embodiment 2 of the present utility model;

Accompanying drawing 7 is the axial sectional view of the dual-channel variable-section volute with guide vanes in Embodiment 2 of the present utility model.

In the figure: 1-volute; 2-volute diffuser channel; 3-power turbine; 4-volute inlet flow channel partition wall; 5-volute intake outer flow channel; 6-volute intake inner flow channel; 7-runner rib; 8-pulse inner runner rib; 9-left pulse inner runner; 10-right pulse inner runner; 11-volute inlet; 12-volute outlet; 13 --Pneumatic partition; 14-guide vane; 15-bladeless nozzle; 16-inner wall of volute inlet outer flow channel; 17-volute inlet outer flow channel inlet; 18-volute inlet outer flow channel control room ; 19-the end cover of the volute intake outer runner; 20-the intake regulating valve; 21-the mating surface; 22-the left air inlet of the volute inlet outer runner; 23-the right air inlet of the volute inlet outer runner ; 24-volute left air inlet; 25-volute right air inlet.

Detailed ways

Embodiment 1, as shown in Figure 3 and Figure 4, a double-channel variable-section volute device with guide vanes includes a volute 1, and the volute 1 is provided with a volute air inlet 11, a volute The air outlet 12, the volute inlet flow channel and the volute diffuser channel 2;

The volute air intake channel is provided with a pneumatic partition 13, and the aerodynamic partition 13 divides the volute air intake channel into the volute air intake inner channel 6 and the volute air intake outer channel 5;

The volute air intake outer flow channel 5 is located on the circumferential outer side of the volute air intake inner flow channel 6;

Vaneless nozzles 15 are respectively provided at the positions of the volute air intake outer flow channel 5 and the volute air intake inner flow channel 6 close to the volute diffuser passage 2;

A plurality of airfoil-shaped aerodynamic guide vanes 14 are evenly arranged in a circular shape near the vaneless nozzle 15 in the volute air intake outer flow channel 5 .

The volute air intake inner flow channel 6 is a single flow channel, and the volute air intake inner flow channel 6 works within the range of the engine's full working conditions.

The design of the aerodynamic partition 13 conforms to the principle of aerodynamics, and can well induce the flow of exhaust gas to enter the air inlet channel of the volute.

The design of the guide vanes 14 is to fully induce the speed of the exhaust gas flowing through the volute intake outer channel 5 to accelerate and flow into the turbine impeller at a suitable air flow angle under the middle and high working conditions of the engine, so as to reduce the impact of the exhaust gas flow on the turbine wheel. The impingement loss of the turbine impeller, thus improving the efficiency of the turbine intake. the

One end of the guide vane 14 is integrally casted and connected to the inner wall 16 of the volute air intake outer flow channel, and the other end is integrally cast connected to the inner wall of the aerodynamic partition 13 on the side of the volute air intake outer flow channel 5 .

The guide vane 14 is fixed on the volute intake outer flow channel 5 by casting process, on the one hand, it reduces the impact of the high-speed exhaust gas flow on the turbine impeller and prevents the turbine impeller from vibrating. On the other hand, by designing the guide vanes 14 fixed on the casing of the volute 1, the aerodynamic partition 13 and the casing of the volute 1 are cast together to play a role of fixed connection.

As shown in Figure 5, the air inlet of the volute air inlet inner flow passage 6 is connected with the volute air inlet 11, and the air inlet 17 of the volute air inlet outer flow passage is connected with the air inlet of the volute air inlet. The air inlets of the runners 6 are connected.

A volute air intake outer runner control chamber 18 is provided between the volute inlet outer runner 5 and the volute inlet outer runner inlet 17, and the volute inlet outer runner inlet 17 is provided with a matching The volute air inlet outer runner end cover 19 is used to realize the sealing effect on the air intake flow of the volute inlet outer runner 5 .

In order to ensure the effective operation of the volute air intake outer flow channel 5 under the medium and high working conditions of the engine, the air intake control valve 20 is arranged in the control chamber 18 of the volute air intake outer flow channel, and the air intake control valve 20 is connected with the air intake control valve on the aerodynamic partition 13. 20 is provided with a mating surface 21 that matches the air intake regulating valve 20, and the air intake regulating valve 20 is in an open and closed state driven by the air intake regulating control device, thereby realizing the volute air intake outer flow channel 5 working and non-working states.

The space of the control chamber 18 of the volute air intake outer channel limits the opening angle of the intake regulating valve 20 , thereby limiting the flow of exhaust gas entering the volute intake outer channel 5 .

The purpose of the design of the mating surface 21 is to ensure that when the intake regulating valve 20 is in a closed state, the intake regulating valve 20 is closely matched with the volute air intake outer flow channel 5 to prevent the intake air from entering the volute under low engine conditions. The airflow in the inner runner 6 flows into the outer inlet runner 5 of the volute, which reduces the intake efficiency.

In order to be suitable for a constant pressure supercharging system, such as a four-cylinder engine, the volute inlet 11 is designed as a single inlet.

Under the medium and high working conditions of the engine, driven by the air intake adjustment control device, the intake air adjustment valve 20 (the dotted line position) is in the open state. Flow through the volute inlet into the volute intake inner channel 6 and the volute intake outer channel 5, and the exhaust gas flows through the volute inlet inner channel 6 and the volute intake outer channel 5 to enter the turbine, thereby driving the turbine acting. Since the fixed and evenly distributed airfoil-type aerodynamic guide vanes 14 are arranged near the vaneless nozzle 15 on the volute air intake outer flow channel 5, the airflow flowing through the volute air intake outer flow channel 5 can be induced to enter the turbine evenly, Air flow blockage at the vaneless nozzle 15 is prevented, the impact loss of the exhaust gas flow at the vaneless nozzle 15 on the turbine is reduced, and the turbine air intake efficiency is improved.

Under the low engine working condition, driven by the air intake adjustment control device, the intake air adjustment valve 20 (the position of the solid line) is in the closed state. Only flow through the volute intake inner flow channel 6, because the working cross-sectional area of the volute intake flow channel is reduced, so the intake velocity of the volute exhaust gas flow is increased, thereby improving the turbine efficiency in low-speed conditions.

Embodiment 2, as shown in Figure 6, is suitable for pulse supercharging systems, such as six-cylinder engines, in the above-mentioned Embodiment 1, the volute inlet 11 can also be designed as a double inlet: including the left side of the volute Air inlet 24 and air inlet 25 on the right side of the volute.

As shown in Figure 7, the volute intake inner flow channel 6 is provided with a pulse inner flow channel rib 8, and the pulse inner flow channel rib 8 divides the volute intake inner flow channel 6 into the left pulse inner flow channel. Runner 9 and right pulse inner runner 10.

The left pulse inner flow channel 9 and the right pulse inner flow channel 10 are respectively connected with the left air inlet 24 of the volute and the right air inlet 25 of the volute.

The cross-section of the pulse internal flow channel rib 8 is tapered, and the pulse internal flow channel rib 8 is connected with the pneumatic partition 13 by casting.

The air inlet of the left pulse inner flow channel 9 and the air inlet of the right pulse inner flow channel 10 communicate with the air inlet 24 on the left side of the volute and the air inlet 25 on the right side of the volute respectively. The air inlet 22 on the left side of the shell air inlet outer flow channel and the right air inlet 23 on the outer air flow channel of the volute are respectively connected with the air inlet of the left pulse inner flow channel 9 and the air inlet of the right pulse inner flow channel 10 Pass.

Under the medium and high working conditions of the engine, for the pulse supercharging system, the outer flow channel does not need to be divided into two parts, and enough energy can be obtained by using one flow channel. Driven by the air intake adjustment control device, the intake air adjustment valve is in an open state. At this time, the volute air intake outer channel is in working state, the pulse air flow discharged by the engine flows through the volute air inlet into the volute air intake inner channel and the volute air intake outer channel, and the pulse flow flows through the volute air intake The inner runner and the outer runner of the volute intake enter the turbine, thereby driving the turbine to do work. Since the fixed and evenly distributed airfoil-type aerodynamic guide vanes are set near the vaneless nozzle in the outer flow channel of the volute, the airflow flowing through the outer flow channel of the volute can be well induced to flow in a suitable manner. The airflow angle enters the turbine impeller uniformly, preventing airflow blockage at the nozzle, reducing the impact loss of the impulsive flow at the nozzle of the volute to the turbine, thereby improving the efficiency of the turbine.

Under the low working condition of the engine, driven by the air intake adjustment control device, the air intake adjustment valve is in a closed state, at this time the outer flow channel of the volute air intake is in a non-working state, and the inner flow channel of the volute air intake is divided into two flow channels, Good pulse energy can be obtained, the pulse air flow discharged by the engine only flows through the left pulse inner flow channel and the right pulse inner flow channel, because the cross-sectional area of the volute inlet flow channel is reduced, so the intake of the volute exhaust gas flow is improved Gas velocity, thus improving the turbine efficiency at low speed conditions.

Claims (9)

1. Twin channel variable cross section spiral case device with guide vane comprises:

Spiral case (1) is provided with spiral case suction port (11), spiral case air outlet (12) and spiral case air inlet runner and spiral case diffusion passage (2) in the said spiral case (1);

Be provided with pneumatic barrier (13) in the said spiral case air inlet runner, said pneumatic barrier (13) is divided into spiral case air inlet inner flow passage (6) and spiral case air inlet outer flow passage (5) with the spiral case air inlet runner;

The week that said spiral case air inlet outer flow passage (5) is positioned at said spiral case air inlet inner flow passage (6) laterally;

Said spiral case air inlet outer flow passage (5) and spiral case air inlet inner flow passage (6) are respectively equipped with non-blade nozzle (15) near the position of spiral case diffusion passage (2);

It is characterized in that: locate evenly to be provided with ringwise some wing blade pneumatic type guide vanes (14) near non-blade nozzle (15) in the spiral case air inlet outer flow passage (5).

2. a kind of Twin channel variable cross section spiral case device according to claim 1 with guide vane; It is characterized in that: an end of said guide vane (14) is connected with spiral case air inlet outer flow passage inwall (16) integrally casting, and the other end is connected with the inwall integrally casting that pneumatic barrier (13) is positioned at spiral case air inlet outer flow passage (5) one sides.

3. a kind of Twin channel variable cross section spiral case device according to claim 1 and 2 with guide vane; It is characterized in that: the suction port of said spiral case air inlet inner flow passage (6) is connected with spiral case suction port (11), and said spiral case air inlet outer flow passage suction port (17) is connected with the suction port of spiral case air inlet inner flow passage (6).

4. a kind of Twin channel variable cross section spiral case device with guide vane according to claim 3 is characterized in that:

Be provided with spiral case air inlet outer flow passage control room (18) between said spiral case air inlet outer flow passage (5) and the spiral case air inlet outer flow passage suction port (17), spiral case air inlet outer flow passage suction port (17) locates to be provided with the spiral case air inlet outer flow passage end cap (19) that matches.

5. a kind of Twin channel variable cross section spiral case device according to claim 4 with guide vane; It is characterized in that: be provided with air inlet adjustment valve (20) in the said spiral case air inlet outer flow passage control room (18); Pneumatic barrier (13) is gone up and the corresponding position of air inlet adjustment valve (20) is provided with the fitting surface (21) that air inlet adjustment valve (20) is complementary, and said air inlet adjustment valve (20) is in the open and close state under the drive of air inlet adjustment control gear.

6. a kind of Twin channel variable cross section spiral case device with guide vane according to claim 5, it is characterized in that: said spiral case suction port (11) is single suction port.

7. a kind of Twin channel variable cross section spiral case device with guide vane according to claim 5 is characterized in that: said spiral case suction port (11) is two suction ports: comprise spiral case left side suction port (24) and spiral case right side suction port (25).

8. a kind of Twin channel variable cross section spiral case device with guide vane according to claim 7 is characterized in that:

Said spiral case air inlet inner flow passage (6) is provided with pulse inner flow passage floor (8), and said pulse inner flow passage floor (8) is divided into left side pulse inner flow passage (9) and right side pulse inner flow passage (10) with spiral case air inlet inner flow passage (6);

Said left side pulse inner flow passage (9) is connected with spiral case right side suction port (25) with spiral case left side suction port (24) respectively with right side pulse inner flow passage (10).

9. a kind of Twin channel variable cross section spiral case device according to claim 8 with guide vane; It is characterized in that: the cross section of said pulse inner flow passage floor (8) is gradual shrinkage, and said pulse inner flow passage floor (8) is connected with pneumatic barrier (13) integrally casting.

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