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Switchable double-inlet asymmetric turbine volute

A turbine box, asymmetric technology, applied in the direction of machines/engines, internal combustion piston engines, mechanical equipment, etc., can solve the problems of high turbine speed and affecting the flow capacity of the turbine, and achieve the effect of widening the turbine flow range

Inactive Publication Date: 2014-02-05
CHINA NORTH ENGINE INST TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain reliability problems in this patent. Once the control mechanism fails, the movable cylindrical piston will be fixed in the closed position or the open position, causing the turbine speed to be too high or too low, affecting the flow capacity of the turbine

Method used

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  • Switchable double-inlet asymmetric turbine volute
  • Switchable double-inlet asymmetric turbine volute
  • Switchable double-inlet asymmetric turbine volute

Examples

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no. 2 example

[0027] A double-entry asymmetric turbine box with switching valves, including a double-channel turbine box inlet 1 with two branches, a first branch 2, a second branch 3 and an asymmetrical box 8, the box 8 is equipped with The first scroll 9 and the second scroll 10, wherein the first scroll 9 is smaller than the second scroll 10A / R; the first branch 2 is connected to the first scroll 9, and the second branch 3 is connected to the second scroll Road 10 is connected, and also includes switching valve 4 located in the inlet passage and the control mechanism of switching valve 4, which is characterized in that: the first scroll 9 is aligned with the hub of the turbine, and the second scroll 10 is aligned with the rim of the turbine.

[0028] The A / R ratio will affect the turbine flow and the smoothness of turbine work during the two-branch switching process. Preferably, the A / R ratios of the first scroll 9 and the second scroll 10 are both between 0.4 and 0.8.

no. 3 example

[0030] A double-entry asymmetric turbine box with switching valves, including a double-channel turbine box inlet 1 with two branches, a first branch 2, a second branch 3 and an asymmetrical box 8, the box 8 is equipped with The first scroll 9 and the second scroll 10, wherein the first scroll 9 is smaller than the A / R of the second scroll 10; the first branch 2 is connected to the first scroll 9, and the second branch 3 is connected to the second scroll 10. The two volutes 10 are connected, and also include a switching valve 4 located in the inlet passage and a control mechanism for the switching valve 4, and the feature is that the box body 8 is equipped with an air release valve 12 and an air release valve actuator 13.

[0031] The function of the purge valve 12 is to provide a bypass channel for the air flow when the control mechanism of the switching valve 4 fails, and can further increase the turbine flow.

[0032] When the switching valve is working normally, the bleed v...

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Abstract

The invention relates to a double-inlet asymmetric turbine volute provided with a switching valve. The asymmetric turbine volute comprises a double-channel turbine volute inlet (1) provided with two branches, a first branch (2), a second branch (3) and an asymmetric volute body (8), and is characterized in that the volute body (8) is provided with a first vortex path (9) and a second vortex path (10), wherein an A / R (area / radius) ratio of the first vortex path (9) is smaller than that of the second vortex path (10); the first branch (2) is connected with the first vortex path (9), and the second branch (3) is connected with the second vortex path (10); and the asymmetric turbine volute further comprises the switching valve (4) located on an inlet channel and a control mechanism of the switching valve (4). The swinging switching valve is mounted in the inlet section of the turbine volute for controlling inlet air flow of the double-inlet asymmetric turbine volute, and the turbine flowing range can be effectively enlarged.

Description

technical field [0001] The invention belongs to the technical field of turbochargers, and in particular relates to a variable geometry turbine (abbreviated as VGT) structure. Background technique [0002] In order to cooperate with the reciprocating working process of the internal combustion engine, the turbocharger turbine needs to work in a wide flow range. When the engine is running at low speed, the turbine flow rate is small, resulting in a low turbo expansion ratio, so that the turbine cannot provide effective power to drive the compressor. When the engine is running at high speed, the turbine flow is large, but it may cause the turbine to block, resulting in high engine back pressure. [0003] There are many ways in the prior art to widen the flow range of the turbine, such as using bleed valves, variable nozzles, etc. For a turbine with a bleed valve, when the expansion ratio is too high or the work of the turbine exceeds the demand, the turbine flow can be increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/12
CPCY02T10/144Y02T10/12
Inventor 邢卫东陈化王增全程江华庄丽
Owner CHINA NORTH ENGINE INST TIANJIN
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