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Exhaust gas bypass turbine machine with turbine end being provided with gas inlet mixing device

A turbine and exhaust gas technology, applied in the direction of mechanical equipment, engine components, machines/engines, etc., can solve the problems of turbine 11 impact, affecting turbine reliability, affecting customer driving comfort, etc., to reduce airflow impact and reduce BPF noise and casing thermal stress concentration, improving reliability and turbine efficiency

Inactive Publication Date: 2018-11-06
康跃科技(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When only one position of the throat is close to the turbine blades, periodic impacts will be generated on the turbine 11, and the blades of the turbine 11 are prone to high-cycle fatigue fracture, which affects the reliability of the turbine operation
In addition, periodic impacts are likely to generate noise due to airflow impact, which affects the driving comfort of customers

Method used

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  • Exhaust gas bypass turbine machine with turbine end being provided with gas inlet mixing device
  • Exhaust gas bypass turbine machine with turbine end being provided with gas inlet mixing device
  • Exhaust gas bypass turbine machine with turbine end being provided with gas inlet mixing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] like Figure 5 , Image 6 and Figure 7 Commonly shown, the wastegate turbine with a throat mixing device at the vortex end includes a turbine 11 and a turbine casing 12, and the turbine casing 12 is provided with a first throat 16, a second throat 18 and a vaneless nozzle 10 , and also includes a waste gas bypass passage communicated with the second throat 18, and a bypass purge valve 2 is provided between the second throat 18 and the waste gas bypass passage. The distribution radius of the first throat 16 and the second throat 18 is increased, and at the same time, the outer diameter of the vaneless nozzle 10 is increased, and the volume of the vaneless nozzle 10 is increased. Before the turbine exhaust gas enters the turbine 11, the gas is firstly mixed in the vaneless nozzle 10. Since the volume of the vaneless nozzle 10 increases, the space for mixing the exhaust gas increases, the effect of exhaust gas mixing is good, and the mixing is more uniform. The mixed e...

Embodiment 2

[0034] like Figure 8 and Figure 9 Commonly shown, the wastegate turbine with a throat mixing device at the vortex end includes a turbine 11 and a turbine casing 12, and the turbine casing 12 is provided with a first throat 16, a second throat 18 and a vaneless nozzle 10 , and also includes a waste gas bypass passage communicated with the second throat 18, and a bypass purge valve 2 is provided between the second throat 18 and the waste gas bypass passage. Adjust the distribution radius of the first throat 16 on the turbine shell 12, set the first throat 16 as a front throat, and the exhaust gas passing through the first throat 16 enters the vaneless nozzle earlier than the exhaust gas passing through the second throat 18 10. When the exhaust gas enters the first throat 16 of the turbine shell 12, on the one hand, it is mixed with the gas at the second throat 18 to reduce the impact of the exhaust gas on the blades of the turbine 11; 11 blades do work. Through the arrange...

Embodiment 3

[0036] like Figure 10 , Figure 11 and Figure 12 Commonly shown, the wastegate turbine with a throat mixing device at the vortex end includes a turbine 11 and a turbine casing 12, and the turbine casing 12 is provided with a first throat 16, a second throat 18 and a vaneless nozzle 10 , and also includes a waste gas bypass passage communicated with the second throat 18, and a bypass purge valve 2 is provided between the second throat 18 and the waste gas bypass passage. Adjust the distribution radius of the second throat 18 on the turbine casing 12 , the second throat 18 is a front throat, and the exhaust gas in the second throat 18 enters the vaneless nozzle 10 earlier than the exhaust gas in the first throat 16 .

[0037]When the exhaust gas enters the second throat 18 of the turbine housing 12, when the bypass bleed valve 2 is closed, the first throat 16 and the second throat 18 are arranged one after the other, so that the air flow flows through the vaneless nozzle. I...

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Abstract

The invention discloses an exhaust gas bypass turbine machine with the turbine end being provided with a throat gas inlet mixing device. The exhaust gas bypass turbine machine comprises a turbine anda turbine shell, and a first throat, a second throat and a non-blade nozzle are arranged on the turbine shell. Before entering the turbine, turbine exhaust gas is mixed in the non-blade nozzle firstlyand then enters the turbine to work, thus the exhaust gas entering the turbine is even, and simultaneous impact on blades of the turbine is reduced. According to the exhaust gas bypass turbine machine with the turbine end being provided with the throat gas inlet mixing device, by designing different gas inlet mixing schemes on the turbine machine, under the situation that the through-flow characteristic of the turbine machine is guaranteed, airflow impact to the turbine blades is reduced, the reliability of the turbine and the turbine shell and the turbine machine efficiency are improved, andBPF noise of the turbine and thermal stress concentration of the shell are further lowered.

Description

technical field [0001] The invention relates to a turbine used for a turbocharger, in particular to a waste gas bypass turbine with a throat inlet mixing device at the scroll end, belonging to the field of internal combustion engines. Background technique [0002] Engines for vehicles and construction machinery have high torque and wide speed range, requiring a large torque reserve coefficient. Especially in order to meet the national emission standards, engines for vehicles and construction machinery generally use wastegate turbochargers. [0003] In order to solve the problem of wide range of engine torque characteristics and high requirements for supercharger matching, wastegate turbocharger turbines are designed with low flow capacity at low speeds and large flow capacity at medium and high speeds, and use air flow ranges The wide compressor increases the boost pressure in the low-speed section and reduces the gas work loss of the pump in the medium-high speed section. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D9/02
CPCF01D9/02F05D2220/40
Inventor 李延昭邵同林李伟张金明刘永芳马敏
Owner 康跃科技(山东)有限公司
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