CN211623505U

CN211623505U - Diesel engine turbocharger turbine housing cast with exhaust manifold

Info

Publication number: CN211623505U
Application number: CN202020144328.1U
Authority: CN
Inventors: 蒋玉秀; 李雪娇
Original assignee: Guangxi Industrial Vocational And Technical College
Current assignee: Guangxi Industrial Vocational And Technical College
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-10-02
Anticipated expiration: 2030-01-22

Abstract

The utility model discloses a turbine shell of a turbocharger of a diesel engine, which is cast with an exhaust manifold into a whole and is arranged at the exhaust outlet of the engine; comprises an exhaust manifold and a turbine shell which are cast integrally; the exhaust manifold comprises a main pipe and branch pipes; one end of the main pipe is divided into more than two branch pipes, each branch pipe is fixedly connected with the engine through a flange, and the other end of the main pipe is seamlessly communicated with the air inlet of the turbine shell. The utility model discloses a turbine shell casts with exhaust manifold as an organic whole, can realize diesel engine and turbo charger's optimization matching fast high-efficiently, reducible diesel engine exhaust flow loss, improvement turbo charger's overall efficiency to improve turbo supercharged diesel engine's dynamic nature, economic nature, reduce emission and noise.

Description

Diesel engine turbocharger turbine housing cast with exhaust manifold

Technical Field

The utility model belongs to the technical field of the turbocharging, concretely relates to cast diesel engine turbo charger turbine shell as an organic whole with exhaust manifold.

Background

A turbocharger is an air compressor driven by a structure composed of two coaxial impellers by using exhaust gas generated by the operation of an internal combustion engine. Both, similar to the supercharger function, can increase the air flow into the internal combustion engine or boiler, thereby increasing combustion efficiency. The turbocharger can increase the output power of an internal combustion engine or improve the fuel economy under the same output power by utilizing the heat and flow of exhaust gas in an automobile engine.

The turbine case casing and the engine exhaust pipe manifold of the turbocharger are important parts of an exhaust system of a diesel engine, the engine exhaust pipe manifold and the turbine case casing in the turbocharger work in a high-temperature and high-pressure environment, the exhaust temperature of the diesel engine can reach 800 ℃ at the highest temperature, so that the requirements on materials and strength of parts of the engine are high.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides an avoid gas leakage, not hard up and noise, simultaneously cast diesel engine turbo charger turbine shell as an organic whole with exhaust manifold.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

a turbocharger turbine housing for a diesel engine cast integrally with an exhaust manifold is mounted at an exhaust gas outlet of the engine; comprises an exhaust manifold and a turbine shell which are cast integrally; the exhaust manifold comprises a main pipe and branch pipes; one end of the main pipe is divided into more than two branch pipes, each branch pipe is fixedly connected with the engine through a flange, and the other end of the main pipe is seamlessly communicated with the air inlet of the turbine shell; a step I is arranged between the flange and the outer side surface of the port of the exhaust manifold; an exhaust manifold gasket I is mounted on the step I (namely the exhaust manifold gasket I is arranged between the flange and the engine and used for eliminating the precision error of the matching of the flange and the engine); a step II is arranged on the inner side surface of the port of the exhaust manifold; an exhaust manifold gasket II is arranged on the step II (namely the exhaust manifold gasket II is arranged between the step surface on the inner side of the exhaust manifold and the exhaust gas outlet of the engine and used for eliminating the matching error between the port of the exhaust manifold and the exhaust gas outlet of the engine and increasing the connection tightness of the port and the exhaust gas outlet of the engine); the port of the exhaust manifold is also provided with an arc head, and the middle of the arc head is provided with a groove; an exhaust manifold gasket is arranged in the groove (namely the exhaust manifold gasket is arranged between the groove surface at the front end of the exhaust manifold and the exhaust gas outlet of the engine, so that the degree of contact between the arc head and the exhaust gas outlet of the engine is increased, and the precision error of the arc head machining is eliminated); the interface of the engine is correspondingly matched with the interface of the exhaust manifold. Exhaust manifold gasket I, exhaust manifold gasket II and exhaust manifold packing ring all adopt stainless steel material, exhaust manifold gasket I, exhaust manifold gasket II and exhaust manifold packing ring can make its and exhaust manifold interface more fit under the extrusion state, and then compensate the machining precision error at the interface and the not enough that produce.

As a further technical improvement, the branch pipes are consistent in length, and the lower end of the main pipe is thinned. The branch pipes are consistent in length so as to reduce mutual interference of exhaust gases discharged by each cylinder, and the lower end of the main pipe is thinned so as to enable the collected exhaust gases to be better concentrated and enable the turbine to generate more power.

As a further technical improvement, a support frame is arranged in the middle of the exhaust manifold; the front end of the support frame clamps the middle part of the exhaust manifold through a bolt, and the tail end of the support frame is fixedly connected with the engine through a bolt. The rigidity of the whole turbine shell and the exhaust manifold cast into a whole is reduced, and a supporting frame needs to be added and fixed on an engine to ensure that the exhaust manifold can work for a long time, so that the vibration frequency of the whole engine is kept consistent.

The utility model discloses a theory of operation:

the exhaust manifold gasket I, the exhaust manifold gasket II and the exhaust manifold gasket are used for carrying out multilayer sealing on the exhaust gas at the joint of the exhaust manifold through which the exhaust gas exhausted by the cylinder body of the engine passes, the exhaust gas is converged into the main pipe through each branch pipe and is directly discharged into the turbine to enable the turbine to work, the turbine and the exhaust manifold are integrally cast without gaps, and no air leakage or noise occurs.

Compared with the prior art, the utility model has the advantages and beneficial effect as follows:

1. the utility model discloses a turbine shell cast as an organic whole with exhaust manifold, can realize diesel engine and turbo charger's optimization matching fast high-efficiently, reducible diesel engine exhaust flow loss, improve turbo charger's overall efficiency to improve turbo supercharged diesel engine's dynamic property, economic nature, reduce emission and noise.

2. The utility model discloses a multilayer of exhaust manifold gasket I, exhaust manifold gasket II and exhaust manifold packing ring is sealed, has reduced the diesel engine exhaust flow loss, has improved the stability of interface, makes its work efficiency uprise.

3. The utility model discloses simple structure, the practicality is strong.

Drawings

Fig. 1 is a schematic front structural view of the present invention.

Fig. 2 is a schematic side view of the present invention.

Fig. 3 is a schematic structural diagram of the exhaust manifold interface according to the present invention.

Fig. 4 is a schematic structural diagram of a prior art exhaust manifold fixedly connected with a turbine shell by bolts.

The attached drawings are as follows:

1-engine, 2-exhaust manifold, 3-turbine, 4-support frame, 21-flange, 22-step I, 23-exhaust manifold gasket II, 24-exhaust manifold gasket I, 25-arc head, and 26-exhaust manifold gasket.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example 1:

a turbocharger turbine housing of a diesel engine cast integrally with an exhaust manifold, which is installed at an exhaust gas outlet of an engine 1; comprises an exhaust manifold 2 and a turbine shell 3 which are integrally cast; the exhaust manifold 2 comprises a main pipe and branch pipes; one end of the main pipe is divided into more than two branch pipes, each branch pipe is fixedly connected with the engine 1 through a flange 21, and the other end of the main pipe is seamlessly communicated with an air inlet of the turbine shell 3;

a step I22 is arranged between the flange 21 and the outer side surface of the port of the exhaust manifold 2; an exhaust manifold gasket I24 is mounted on the step I22 (namely, the exhaust manifold gasket I24 is arranged between the flange 21 and the engine 1 and used for eliminating the precision error of the matching of the flange 21 and the engine 1); a step II is arranged on the inner side surface of the port of the exhaust manifold 2; an exhaust manifold gasket II 23 is arranged on the step II (namely the exhaust manifold gasket II 23 is arranged between the step surface on the inner side of the exhaust manifold 2 and the exhaust gas outlet of the engine 1 and is used for eliminating the matching error between the port of the exhaust manifold 2 and the exhaust gas outlet of the engine 1 and increasing the connection tightness of the exhaust manifold gasket II 23 and the exhaust gas outlet of the engine 1); the port of the exhaust manifold 2 is also provided with an arc head 25, and a groove is arranged in the middle of the arc head 25; an exhaust manifold gasket 26 is arranged in the groove (namely, the exhaust manifold gasket 26 is arranged between the groove surface at the front end of the exhaust manifold 2 and the exhaust gas outlet of the engine 1, so that the degree of contact between the arc head 25 and the exhaust gas outlet of the engine 1 is increased, and the machining precision error of the arc head 25 is eliminated); the interface of the engine 1 is correspondingly matched with the interface of the exhaust manifold 2. The exhaust manifold gasket I24, the exhaust manifold gasket II 23 and the exhaust manifold gasket 26 are all made of stainless steel, and the exhaust manifold gasket I24, the exhaust manifold gasket II 23 and the exhaust manifold gasket 26 can be matched with an interface of the exhaust manifold 2 in an extrusion state, so that the defect caused by machining precision errors at the interface is overcome.

Waste gas exhausted by the cylinder body of the engine 1 passes through the joint of the exhaust manifold 2, the exhaust manifold gasket I24, the exhaust manifold gasket II 23 and the exhaust manifold gasket 26 carry out multilayer sealing on the waste gas, then the waste gas is converged into the main pipe through each branch pipe and directly exhausted into the turbine to work, no gap exists between the turbine and the exhaust manifold 2, and no air leakage or noise occurs.

Example 2:

the difference from the embodiment 1 is that the branch pipes are uniform in length, and the lower ends of the main pipes are tapered. The branch pipes are consistent in length so as to reduce mutual interference of exhaust gases discharged by each cylinder, and the lower end of the main pipe is thinned so as to enable the collected exhaust gases to be better concentrated and enable the turbine to generate more power.

The middle part of the exhaust manifold 2 is provided with a support frame 4; the front end of the support frame clamps the middle part of the exhaust manifold 2 through a bolt, and the tail end of the support frame is fixedly connected with the engine 1 through a bolt. The rigidity of the whole turbine shell 3 and the exhaust manifold 2 cast into a whole is reduced, and in order to enable the exhaust manifold 2 to work for a long time, the supporting frame 4 needs to be added and fixed on the engine 1, so that the vibration frequency of the whole is kept consistent.

The working principle of this embodiment is the same as that of embodiment 1.

Claims

1. A turbocharger turbine housing for a diesel engine cast integrally with an exhaust manifold, which is mounted at an exhaust gas outlet of an engine (1); the method is characterized in that: comprises an exhaust manifold (2) and a turbine shell (3) which are integrally cast; the exhaust manifold (2) comprises a main pipe and branch pipes; one end of the main pipe is divided into more than two branch pipes, each branch pipe is fixedly connected with the engine (1) through a flange (21), and the other end of the main pipe is seamlessly communicated with an air inlet of the turbine shell (3);

a step I (22) is arranged between the flange (21) and the outer side surface of the port of the exhaust manifold (2); an exhaust manifold gasket I (24) is mounted on the step I (22); a step II is arranged on the inner side surface of the port of the exhaust manifold (2); an exhaust manifold gasket II (23) is arranged on the step II; an arc head (25) is further arranged at the port of the exhaust manifold (2), and a groove is formed in the middle of the arc head (25); an exhaust manifold gasket (26) is arranged in the groove; the interface of the engine (1) is correspondingly matched with the interface of the exhaust manifold (2).

2. A diesel turbocharger turbine housing cast in one piece with an exhaust manifold as claimed in claim 1, wherein: the branch pipes are consistent in length, and the lower ends of the main pipes are thinned.

3. A diesel turbocharger turbine housing cast in one piece with an exhaust manifold as claimed in claim 1, wherein: the middle part of the exhaust manifold (2) is provided with a support frame (4); the front end of the support frame clamps the middle part of the exhaust manifold (2) through a bolt, and the tail end of the support frame is fixedly connected with the engine (1) through a bolt.