Vaned diffuser suitable for passenger car turbocharger

Abstract

The utility model relates to the technical field of turbochargers, and discloses a bladed diffuser suitable for a passenger car turbocharger, which comprises a supercharger shell 1, the top of the supercharger shell 1 is fixedly connected with a supercharger shell 2, the top of the supercharger shell 1 is rotatably connected with a back disc, and the back disc is rotatably connected with the supercharger shell 2. A plurality of crescent guide vanes are fixedly connected to the top of the back disc, a gas compressor impeller is fixedly connected to the top of the back disc, gas compressor vanes are fixedly connected to the outer portion of the gas compressor impeller, and the tops of the crescent guide vanes make contact with the bottom of the second supercharger shell. According to the air compressor turbocharger, the efficiency of the air compressor turbocharger is improved, then the efficiency of the turbocharger is improved by 3%-4%, the oil consumption of a passenger car engine is reduced by more than 10%, the power is improved by more than 5%, the air compressor turbocharger can be applied to the field of passenger car turbochargers if being popularized, and the air compressor turbocharger contributes to national energy conservation and emission reduction greatly.

Description

Technical Field

[0001] The utility model relates to the technical field of turbochargers, in particular to a vaned diffuser suitable for a turbocharger of a passenger car. Background Art

[0002] Currently, turbocharger compressors for passenger cars all use a vaneless diffuser structure. Vaneless diffuser compressors have the advantage of being simple to manufacture, but compared with vaned diffusers, their shortcomings such as poor pressure diffusion capacity and low efficiency are becoming increasingly apparent in applications.

[0003] The maximum efficiency of a vaned diffuser compressor with guide vanes is 3% to 4% higher than that of a vaneless diffuser, and it has a better improvement in noise and vibration. For a long time, the vaned diffuser structure of a turbocharger has only been used in large engine turbochargers such as ships and engineering machinery due to the immature manufacturing process and high cost.

[0004] However, with the development of passenger car technology, especially in the Chinese market, the requirements for engine fuel consumption, power performance, noise, etc. are getting higher and higher, and users are also pursuing a more extreme experience. How to improve engine power performance, reduce fuel consumption and noise, the role and status of turbochargers are becoming more and more prominent. The turbocharger rate of Chinese passenger car engines has increased from 3% in 2014 to nearly 30%, and the potential for improvement in efficiency and other aspects of traditional vaneless diffuser compressor turbochargers is already very limited. Because China's manufacturing industry has been in a period of rapid development in recent years, the production and manufacturing cost of diffusers with guide vanes is not much different from that of vaneless diffusers. Therefore, in view of the above shortcomings, a vaned diffuser suitable for passenger car turbochargers is proposed. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art and to propose a vaned diffuser suitable for a turbocharger of a passenger car, aiming to improve the problem that the potential for improvement in efficiency and other aspects of some compressor turbochargers of the prior art without vanes is already very limited.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A vaned diffuser suitable for a turbocharger of a passenger car, comprising a supercharger housing 1, the top of the supercharger housing 1 being fixedly connected to a supercharger housing 2, the top of the supercharger housing 1 being rotatably connected to a back plate, the top of the back plate being fixedly connected to a plurality of crescent-shaped guide vanes, the top of the back plate being fixedly connected to a compressor impeller, the outside of the compressor impeller being fixedly connected to compressor vanes, the top of the crescent-shaped guide vanes being in contact with the bottom of the supercharger housing 2;

[0008] As a further description of the above technical solution:

[0009] The exterior of the plurality of compressor blades is in contact with the interior of the second supercharger housing.

[0010] The utility model has the following beneficial effects:

[0011] In the utility model, the efficiency of the compressor turbocharger is improved through the action of the guide vanes, thereby increasing the efficiency of the turbocharger by 3%-4%, reducing the fuel consumption of the passenger car engine by more than 10%, and increasing the power by more than 5%. If it is popularized and used in the field of passenger car turbochargers, it will make a huge contribution to the country's energy conservation and emission reduction, because the reduction of the turbocharger noise effectively reduces the passenger car noise and increases the terminal experience of the passenger car users. At the same time, the reduction of noise is also beneficial to the physical and mental health of the vehicle passengers and users. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A three-dimensional diagram of a vaned diffuser suitable for a turbocharger of a passenger car proposed by the utility model;

[0013] Figure 2 A schematic diagram of the internal structure of a shell of a vaned diffuser suitable for a turbocharger of a passenger car proposed by the utility model;

[0014] Figure 3 The utility model is a schematic diagram of a back plate structure of a vaned diffuser suitable for a turbocharger of a passenger car.

[0015] Legend:

[0016] 1. Supercharger housing 1; 2. Supercharger housing 2; 3. Back plate; 4. Crescent guide vane; 5. Compressor impeller; 6. Compressor blades. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Reference Figures 1 to 3The utility model provides an embodiment: a vaned diffuser suitable for a turbocharger of a passenger car, including a turbocharger housing 1, which is the outer shell of the entire turbocharger, providing structural support and environmental sealing to ensure that the internal components can operate and be protected effectively. The top of the turbocharger housing 1 is fixedly connected to a turbocharger housing 2, which is fixedly connected to the top of the turbocharger housing 1 to provide further support and sealing. The top of the turbocharger housing 1 is rotatably connected to a back plate 3, which is located at the top of the turbocharger housing 1 and rotatably connected thereto. A plurality of crescent-shaped guide vanes 4 are fixed to the top of the back plate 3. The design of these vanes is similar to the crescent shape, and is intended to guide and optimize the gas flow entering the diffuser groove. The top of the back plate 3 is fixedly connected with a plurality of crescent-shaped guide vanes 4. The crescent-shaped guide vanes 4 are in contact with the bottom of the supercharger housing 2, which helps to improve the stability and fluid dynamics of the gas flow, thereby reducing energy loss and improving efficiency. The top of the back plate 3 is fixedly connected with a compressor impeller 5. The compressor impeller 5 is fixed to the top of the back plate 3. It is the compressor part of the turbocharger. It compresses the air through high-speed rotation to increase its pressure and density. The outside of the compressor impeller 5 is fixedly connected with compressor blades 6. The compressor blades 6 are fixed to the outside of the compressor impeller 5. Their design helps to effectively compress the air and guide it into the diffuser groove of the turbocharger. The top of the crescent-shaped guide vane 4 is in contact with the bottom of the supercharger housing 2.

[0019] Reference Figures 1 to 3 The outside of multiple compressor blades 6 are in contact with the inside of the supercharger housing 2, ensuring that the air sucked in from the compressor inlet can effectively flow to the expansion part of the supercharger after being compressed by the blades. When the exhaust gas discharged by the engine drives the turbine shaft to rotate, the gas enters the compressor impeller 5 through the through hole, driving it to rotate and realize air compression. The through hole is connected to the turbocharger, so that the turbocharger drives the compressor impeller 5 to rotate.

[0020] Working principle: When the turbocharger starts working, it drives the compressor impeller 5 to rotate, sucks in fresh air from the compressor inlet (impeller guide wheel part), and enters the diffuser groove after energy conversion by the compressor impeller 5. When working in the diffuser groove, the structure of the crescent-shaped guide vane 4 can effectively improve the flow condition of the gas in the diffuser groove, reduce turbulence, reduce friction loss, and improve diffusion. The final performance is that the pressure ratio and efficiency of the supercharger are greatly improved, and the supercharger noise is effectively reduced.

[0021] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vaned diffuser suitable for a turbocharger of a passenger car, comprising a turbocharger housing (1), characterized in that: The top of the supercharger housing one (1) is fixedly connected to the supercharger housing two (2), the top of the supercharger housing one (1) is rotatably connected to a back plate (3), the top of the back plate (3) is fixedly connected to a plurality of crescent-shaped guide vanes (4), the top of the back plate (3) is fixedly connected to a compressor impeller (5), the outside of the compressor impeller (5) is fixedly connected to compressor blades (6), and the top of the crescent-shaped guide vanes (4) is in contact with the bottom of the supercharger housing two (2).

2. The vaned diffuser suitable for a turbocharger of a passenger car according to claim 1, characterized in that: The exterior of the plurality of compressor blades (6) is in contact with the interior of the second supercharger housing (2).

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