Variable-runner turbocharger volute
A turbocharger and flow channel technology, which is applied in the field of variable flow channel turbocharger volutes, can solve the problems of increased casting cost, gas energy dissipation, complicated inner and outer volute flow channel structures, etc. The effect of high turbine efficiency, small flow loss and simple structure
Active Publication Date: 2018-03-06
CHINA FIRST AUTOMOBILE
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Problems solved by technology
When only the inner flow channel works, the cross-sectional area of the volute suddenly expands after the gas passes through part of the partition, resulting in separation, resulting in serious energy dissipation of the gas
In addition, the structure of the inner and outer volute flow channels is complex, which leads to increased casting costs
Method used
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Embodiment Construction
[0016] Such as figure 1 , 2 A variable channel turbocharger turbine assembly is shown, and the turbine assembly includes: a volute cavity 7, and the volute cavity 7 has a volute flow channel for collecting exhaust gas from the engine. The exhaust gas is sent into the inlet part of the impeller blade 4 through the spiral flow passage.
[0017] The volute cavity 7 is provided with a sliding partition, and the sliding partition includes a sliding plate 2 and a partition 3 connected in a "T" shape, wherein the sliding plate 2 slides relative to the volute 1 and forms a joint with the volute 1. Airtight seal. The partition 3 divides the flow channel into a first flow channel 10 and a second flow channel 11 .
[0018] The turbine blade 4 is fixed on the turbine hub 5, and there is a small gap between the turbine blade 4 and the wheel cover 6.
[0019] work process:
[0020] When the engine is working at low speed and heavy load, the compressor needs to provide more fresh air. ...
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The invention discloses a variable-runner turbocharger volute. The variable-runner turbocharger volute comprises a volute cavity. A volute runner for collecting exhaust from an engine is arranged on the volute cavity. The exhaust is conveyed into an inlet part of blades of an impeller through the volute runner. The variable-runner turbocharger volute is characterized in that a sliding partition islongitudinally arranged in the volute cavity in the flowing direction of the exhaust and used for partitioning the volute runner into a first runner body and a second runner body, wherein the sectional area of each of the first runner body and the second runner body is relatively changed. According to the variable-runner turbocharger volute, the slidable partition is arranged in the volute, the volute runner is divided into the two runner bodies, the flow of gas in the first runner body and the flow of gas in the second runner body are adjusted through the slidable partition, meanwhile the airflow angle of an outlet of the volute is adjusted. According to the variable-runner turbocharger volute, switching of a radial-flow turbine and a mixed-flow turbine is achieved by controlling the flow angle of gas at the volute outlet, so that the flowing loss is small, and the efficiency of the turbine is high. The variable-runner turbocharger volute is more suitable for optimizing the comprehensive performance of a supercharger and an engine under different working conditions of the engine.
Description
technical field [0001] The invention belongs to the technical field of exhaust gas turbocharging, in particular to a volute of a variable channel turbocharger. Background technique [0002] When the engine is running at low speed, medium and high load, the compressor needs to provide more fresh air. The energy required for the compressor comes from the turbine. Therefore, the turbine needs to be adjusted to the high efficiency area. In addition, when the engine is running at high speed, the exhaust energy of the turbocharger is more. In order to reduce the exhaust back pressure as much as possible and improve fuel efficiency, the turbocharger needs to be adjusted to the direction of large flow. To this end, it is necessary to design a variable channel turbocharger, so that the matching between the engine and the supercharger is more coordinated under different working conditions. [0003] The prior art mainly solves the above problems by setting turbine volutes with diffe...
Claims
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Login to View More IPC IPC(8): F01D25/24F01D17/10F02B37/22
CPCY02T10/12
Inventor 杨海涛周得广居钰生许汉君郭立新谢爱元
Owner CHINA FIRST AUTOMOBILE