CN201334957Y - Helical air inlet channel suitable for supercharger-type diesel with cylinder diameter of Phi 102mm - Google Patents

Abstract

The utility model discloses a spiral air inlet suitable for a turbocharged diesel engine with a cylinder diameter of Φ102 mm. The distance to the y-coordinate of the cylinder centerline is 7-9mm; the distance from the center of the spiral chamber to the y-coordinate of the cylinder centerline is 23-25mm; The distance from the centerline of the inlet end face to the abscissa x of the cylinder centerline is 29.5-31.5mm. The use of the above-mentioned three-dimensional spiral intake port can generate an airflow in the cylinder with a swirl ratio of 1.5 and a flow coefficient of 0.44, so that the air and fuel can be fully mixed.

Description

It is suitable for the spiral inlet port of the turbocharged diesel engine with a cylinder diameter of Ф102mm

technical field

The utility model relates to a spiral air inlet suitable for a turbocharged diesel engine with a cylinder diameter of Φ102mm.

Background technique

At present, the Euro III emission model with a φ102mm cylinder diameter is being developed. The inlet flow coefficient of the supercharged model is only 0.40, and the swirl ratio of 2.2 is too high, which is not suitable for the Euro III emission model.

Contents of the invention

The purpose of the utility model is to provide a helical air inlet suitable for a turbocharged diesel engine with a cylinder diameter of Φ102 mm, with a vortex ratio of 1.5 and a flow coefficient of 0.44.

The technical scheme that the utility model adopts is as follows:

It is suitable for the spiral inlet port of a supercharged diesel engine with a cylinder diameter of Φ102mm. The spiral inlet port is composed of an air passage inlet, a spiral chamber, and a spiral chamber outlet. The distance between the center of the spiral chamber and the y-coordinate of the cylinder centerline is 7 ～9mm, the distance from the center of the spiral chamber to the ordinate x of the cylinder centerline is 24～26mm; the distance from the end surface of the air passage inlet to the ordinate y coordinate of the cylinder centerline 103～107, the distance from the end surface of the air passage inlet to the abscissa x of the cylinder centerline It is 29.5-31.5mm. The spiral chamber is composed of tangent multi-section three-dimensional arcs R1, R2, R3, R4, R5, R6, R7, R8, R1 is 1-3mm, R2 is 19.8-20.7mm, R3 is 2-4mm , R4 is 17~19mm, R5 is 22~24mm, R6 is 32~36mm, R7 is 68~72mm, R8 is 118~122mm. The spiral chamber is provided with a conduit boss, the distance from the end surface of the conduit boss to the bottom surface of the cylinder head is 35-39 mm, and the distance from the center of the air passage inlet to the end surface of the air passage outlet is 48-52 mm. The outlet diameter of the spiral chamber is 40-41.5mm; the height of the airway inlet is 50-54mm, and the width of the airway inlet is 43-47mm.

The adoption of the above-mentioned three-dimensional spiral inlet can generate an air flow with a swirl ratio of 2.2 and a flow coefficient of 0.40, and the air and fuel are fully mixed.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of another direction of the utility model.

Fig. 3 is a three-dimensional structure diagram of the utility model.

Detailed ways

Referring to Figures 1, 2, and 3, the diesel engine is provided with a three-dimensional spiral inlet, and the diesel engine is also equipped with a cylinder 4. The spiral inlet is composed of an air passage inlet 1, a spiral chamber 2, and a spiral chamber outlet 3. The center of the spiral chamber 2 is The distance A to the vertical coordinate y of the centerline of the cylinder 4 is 7-9mm, the distance B from the center of the spiral chamber 2 to the vertical coordinate x of the cylinder 4 centerline is 23-25mm; The distance C is 103-107mm, the distance D from the end surface of the airway inlet 1 to the abscissa x of the centerline of the cylinder 4 is 29.5-31.5mm, and the spiral chamber 2 consists of tangent multi-section three-dimensional arcs R1, R2, R3, R4, R5, R6, R7, R8 are combined, R1 is 1~3mm, R2 is 19.8~20.7mm, R3 is 2~4mm, R4 is 17~19mm, R5 is 22~24mm, R6 is 32~36mm, R7 is 68~ 72mm, R8 is 118-122mm, the spiral chamber 2 is provided with a conduit boss 5, the distance E from the end surface of the conduit boss 5 to the bottom surface of the cylinder head is 35-39mm, and the distance from the center of the airway inlet 1 to the end surface of the spiral chamber outlet 3 F is 48-52mm, the diameter of the spiral chamber outlet 3 is 40-41.5mm; the height H of the airway inlet 1 is 50-54mm, and the width M of the airway inlet 1 is 43-47mm.

According to the design drawings of the air inlet, the male mold is made of wood, and then the test box blank is poured with resin, and the air passage performance is repaired after processing and assembling the valve seat and the valve. After repairing and testing, cast resin into a positive mold. Casting molds for intake ports can be made by precision casting with positive molds or scanned into three-dimensional graphics and then processed by CAM. Casting this spiral intake port in the cylinder head of a diesel engine reduces fuel consumption and smoke at the maximum torque point of the diesel engine after installation. . The spiral inlet is made of resin into a test box. On the premise of ensuring that its structural size meets the requirements of use, the position and size of the inlet of the spiral section are adjusted and modified on the test box, and the modified swirl ratio and flow rate are tested. coefficient. In view of the problem that the diesel engine needs a large flow, the flow coefficient is increased to 0.44, and the swirl ratio is adjusted to 1.5.

Claims (4)

1. be applicable to that cylinder diameter is the spiral inlet duct of Φ 102mm pressure-increasing machine diesel engine, it is characterized in that: described spiral inlet duct is by air flue import, volute, volute export mixes, the volute center is 7～9mm to the distance of cylinder centerline y coordinate y, and the volute center is 24～26mm to the distance of cylinder centerline abscissa x; The air flue inlet end face is to the distance 103～107 of cylinder centerline y coordinate y, and air flue inlet end face center line is 29.5～31.5mm to the distance of cylinder centerline abscissa x.

2. the cylinder diameter that is applicable to according to claim 1 is the spiral inlet duct of Φ 102mm pressure-increasing machine diesel engine, it is characterized in that: described volute is combined by the three-dimensional circular arc R 1 of tangent multistage, R2, R3, R4, R5, R6, R7, R8, R1 is 1～3mm, R2 is 19.8～20.7mm, and R3 is 2～4mm, and R4 is 17～19mm, R5 is 22～24mm, R6 is 32～36mm, and R7 is 68～72mm, and R8 is 148～152mm.

3. the cylinder diameter that is applicable to according to claim 1 is the spiral inlet duct of Φ 102mm pressure-increasing machine diesel engine, it is characterized in that: be provided with the conduit boss in the described volute, the end face of conduit boss is 35～39mm to the distance of cylinder head bottom surface, and air flue import center is to the distance 48～52mm of volute exit end face.

4. the cylinder diameter that is applicable to according to claim 1 is the spiral inlet duct of Φ 102mm pressure-increasing machine diesel engine, and it is characterized in that: described volute outlet diameter is 40～41.5mm; Described air flue inlet height is 50～54mm, and described air flue entrance width is 43～47mm.

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