An air intake structure for improving the performance of a turbocharged engine compressor

Abstract

The utility model belongs to turbocharging intake technology field of gas engine, especially improve the air intake structure of turbocharged engine compressor performance, including air cleaner, one end of air cleaner is provided with air inlet elbow, air inlet elbow is provided with compressor away from air cleaner one end, be provided with air intake assembly between compressor and air inlet elbow, air intake assembly includes novel bellows and compressor connector pipe. The utility model carries out optimization to the flow field: the rectification grid structure can obviously restrain vortex, and the bellows with rectification grid pass through change compressor impeller import flow field to influence turbocharger compressor's performance, make compressor close to design point work and effectively improve the adiabatic efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of gas engine turbocharger intake technology, and particularly relates to an intake structure that improves the performance of turbocharger compressors. Background Technology

[0002] Most gas engines on the market currently use turbocharging for intake, primarily to increase the engine's intake air volume and thus its power. Due to space constraints, the existing turbocharger and air filter connection pipes typically have one or more non-planar bends (90° or more). This causes airflow deflection near the compressor impeller inlet, resulting in strong vortices and an uneven flow field at the compressor inlet. Consequently, the compressor's actual performance deviates from its design specifications, reducing adiabatic efficiency and leading to performance worse than predicted. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides an intake structure that can significantly improve the uniformity of the compressor inlet flow field and suppress eddies.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides an intake structure for improving the performance of a turbocharged engine compressor, including an air filter, an intake bend pipe provided at one end of the air filter, a compressor provided at the end of the intake bend pipe away from the air filter, and an intake assembly provided between the compressor and the intake bend pipe. The intake assembly includes a novel corrugated pipe fitting and a compressor connector.

[0005] Preferably, the novel corrugated pipe fitting includes a corrugated pipe body, connecting flanges on both sides of the corrugated pipe body, a flow guide pipe on the outer side of the middle part of the corrugated pipe body, and a flow rectifier grid inside the corrugated pipe body.

[0006] Preferably, the air filter, intake bend, new corrugated pipe fitting, compressor connector and compressor are all fixedly connected by bolts.

[0007] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. This utility model optimizes the flow field: the rectifier grid structure can significantly suppress eddies; 2. Efficiency Improvement: Engine tests show that the compressor outlet temperature decreases by approximately 14°C under full load conditions, and the adiabatic efficiency improves by nearly 7%. 3. Simple structure: No need to change the existing air intake pipe layout, the rectifier grille can be formed by thin plate stamping process, and the cost is controllable; 4. The bellows with a rectifier grille affects the performance of the turbocharger compressor by changing the flow field at the compressor impeller inlet, making the compressor work closer to the design point and effectively improving the insulation efficiency. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of an intake structure for improving the performance of a turbocharged engine compressor, provided in Example 1. Figure 2 for Figure 1 A magnified view of part I; Figure 3 This is a structural schematic diagram of the novel corrugated pipe fitting provided in Example 1; Figure 4 A structural schematic diagram of the novel corrugated pipe fitting provided in Example 1 (from another angle); Figure 5 A schematic diagram of the structure of the rectifier grille provided in Example 1; In the above figures: 1-Air filter, 2-Intake bend, 3-Bellboard with rectifier grille, 31-Flange, 32-Bellboard, 33-Guide pipe, 34-Rectifier grille, 4-Compressor connection pipe, 5-Compressor. Detailed Implementation

[0010] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0011] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0012] Example 1, as Figures 1-5 As shown, this utility model provides an intake structure for improving the performance of a turbocharged engine compressor, including an air filter, an intake bend pipe at one end of the air filter, a compressor at the end of the intake bend pipe away from the air filter, and an intake assembly between the compressor and the intake bend pipe. The intake assembly includes a novel corrugated pipe fitting and a compressor connector.

[0013] Preferably, the novel corrugated pipe fitting includes a corrugated pipe body, connecting flanges on both sides of the corrugated pipe body, a flow guide pipe on the outer side of the middle part of the corrugated pipe body, and a flow rectifier grid inside the corrugated pipe body.

[0014] Preferably, the air filter, intake bend, new corrugated pipe fitting, compressor connector and compressor are all fixedly connected by bolts.

[0015] The above components are further explained below.

[0016] The air filter 1 is the core component of the intake system. Its main function is to filter the air, protect the high-speed rotating compressor blades, and reduce engine wear.

[0017] The intake bend is made of steel plate and flange welded together.

[0018] A compressor inlet pipe 4 is installed at the compressor inlet of the turbocharger. It adopts a tapered structure (cross-sectional area reduced by 45%), and its length is approximately the compressor impeller inlet diameter. A bellows pipe 3 with a flow-rectifying grille is installed at the front end of the compressor inlet pipe 4. The bellows pipe 3 with the flow-rectifying grille is located at the end of the intake pipe at a distance of ≤1.5 times the compressor impeller inlet diameter from the compressor impeller inlet.

[0019] like Figure 3 As shown, the bellows 3 with a flow straightener grille is welded together by argon arc welding from flange 31, bellows 32, guide pipe 33, and flow straightener grille 34. Installed on the intake pipe, it compensates for thermal expansion and contraction displacement caused by compressor temperature changes and provides flexibility to compensate for installation deviations, making the entire intake system connection more reliable. The guide pipe 33 guides the airflow and reduces the turbulence effect of the bellows 32 on the airflow. The flow straightener grille 34 can be formed by sheet metal stamping. Four parallel / vertical flow straightener grilles 34 are first inserted together and then welded to the inner wall of the guide pipe 33, dividing the cross-section of the guide pipe 33 into nine channels of equal length.

[0020] The specific embodiments of this utility model are described in detail below.

[0021] Taking a 700kW gas engine as an example: 1. The compressor inlet of the turbocharger is equipped with compressor pipe 4, which adopts a tapered structure (cross-sectional area reduced by 45%), and its length is approximately the diameter of the compressor impeller inlet.

[0022] 2. The rectifier grille is located at the end of the intake duct, at a distance of ≤1.5 times the compressor impeller inlet diameter from the compressor impeller inlet; 3. The rectifier grille consists of four 1.5mm thick stainless steel plates, which divide the Φ200mm pipe diameter into nine equal-length channels; 4. The channel is 70mm long and extends along the airflow direction.

[0023] In a 700kW gas engine test, the installation of the bellows 3 with a rectifier grille significantly reduced the rotational motion of the airflow in the intake duct, resulting in fewer vortices within the duct. The compressor outlet temperature was reduced by approximately 14°C compared to the design without the rectifier grille, which is equivalent to an improvement of nearly 7% in compressor adiabatic efficiency, a significant improvement.

[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An intake structure for improving the performance of a turbocharged engine compressor, characterized in that, It includes an air filter, one end of which is provided with an air intake bend, and the end of the air intake bend away from the air filter is provided with an air compressor, and an air intake assembly is provided between the air compressor and the air intake bend. The intake assembly includes a novel corrugated pipe fitting and a compressor connector.

2. The intake structure for improving the compressor performance of a turbocharged engine according to claim 1, characterized in that, The novel corrugated pipe fitting includes a corrugated pipe body, connecting flanges on both sides of the corrugated pipe body, a flow guide pipe on the outer side of the middle part of the corrugated pipe body, and a flow rectifier grid inside the corrugated pipe body.

3. The intake structure for improving the compressor performance of a turbocharged engine according to claim 2, characterized in that, The air filter, intake bend, new corrugated pipe fittings, compressor connector and compressor are all fixedly connected by bolts.

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