Method for improving heat dissipation of vortex end of supercharger and middle shell structure
By adopting an inclined oil groove, an L-shaped cavity design, and an oil-throwing boss in the intermediate shell structure of the turbocharger, the problem of untimely heat dissipation at high temperatures at the turbine end is solved, achieving a faster heat dissipation effect and improving the reliability and durability of the turbocharger.
Patent Information
- Application Number
- CN202511417841.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2025-11-18
AI Technical Summary
In existing technologies, the turbocharger turbine end suffers from oil coking due to insufficient heat dissipation at high temperatures, leading to oil coking in the sealing ring and floating bearing.
The design incorporates inclined oil grooves and an L-shaped large cavity, combined with an oil-throwing boss structure. The high-speed rotation of the rotor shaft drives the oil to splash, thereby enhancing heat dissipation. By setting oil-throwing bosses on the rotor shaft, the oil splashes onto the inner wall of the oil cavity to carry away heat. The intermediate shell structure is improved to enhance heat dissipation efficiency.
It effectively reduces turbine end temperature, prevents oil coking, and improves the reliability and durability of the turbocharger, making it suitable for engines subjected to high-frequency loading, such as those used in power generation and construction machinery.
Smart Images
Figure CN120968864A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of engine, in particular to a method for improving heat dissipation of turbocharger turbine end and an intermediate shell structure. BACKGROUND
[0002] The turbocharger is a technology that compresses air before supplying it into the cylinder to increase air density and intake volume. The purpose is to increase charge volume, improve power, improve economy, and improve emissions.
[0003] At present, after the engine exhaust is burned in the cylinder, it is collected through the exhaust pipe, and the exhaust gas in the cylinder reaches the turbine end of the turbocharger. The gas temperature is about (750-800) DEG C. Due to the high temperature of the turbine end of the turbocharger, the sealing ring and the floating bearing of the turbine end are not timely due to the high temperature. Heat dissipation, and then the problem of oil coking occurs. SUMMARY
[0004] The technical problem to be solved by the present application is to solve the above-mentioned shortcomings of the prior art, provide a method for improving heat dissipation of turbocharger turbine end and an intermediate shell structure, effectively improve the heat dissipation capacity of the turbine end of the turbocharger, reduce the risk of oil coking, and have the characteristics of wide application range and strong practicality.
[0005] The technical scheme adopted by the present application is: an intermediate shell structure for improving heat dissipation of turbocharger turbine end, comprising a turbocharger intermediate shell body, a rotor shaft is arranged on the turbocharger intermediate shell body, a cooling cavity is arranged between the rotor shaft and the turbocharger intermediate shell body, an oil inlet channel is arranged in the turbocharger intermediate shell body above the rotor shaft, an inclined oil groove is arranged in communication with the lower end of the oil inlet channel, a oil distribution channel in communication with the cooling cavity is arranged at the bottom of the inclined oil groove, a first oil cavity in communication with the cooling cavity is arranged above the inclined oil groove, a sealing ring step is arranged on the rotor shaft, a plurality of sealing rings are arranged on the sealing ring step, and a oil throwing boss for throwing oil from the cooling cavity to the first oil cavity is arranged at the front end of the sealing ring step.
[0006] As a further improvement, a second oil cavity in communication with the cooling cavity is arranged in the turbocharger intermediate shell body below the rotor shaft, and a oil return port is arranged at the bottom of the second oil cavity.
[0007] Further, the first oil cavity is in the shape of "L", and the oil inlet of the first oil cavity is located above the oil throwing boss.
[0008] Further, the height of the oil throwing boss is 1 / 2-4 / 5 of the height difference between the rotor shaft and the sealing ring step.
[0009] Further, the inclination angle of the inclined oil groove is 3°-6°.
[0010] Furthermore, the rotor shaft is rotatably mounted on the intermediate housing of the turbocharger via a floating bearing, and the oil outlet of the oil distribution channel is arranged above the floating bearing.
[0011] A method for improving heat dissipation at the turbine end of a turbocharger, the specific operating steps of which are as follows:
[0012] S1: By setting the original main oil passage as an inclined oil groove, the wall thickness between the inclined oil groove and the turbocharger intermediate shell body is increased, providing sufficient space for setting the oil chamber.
[0013] S2: A first oil chamber is provided at the intermediate shell body of the turbocharger near the vortex end, and the first oil chamber is configured as an L-shaped large cavity;
[0014] S3: By setting an oil-throwing boss on the rotor shaft below the first oil chamber, the rotor shaft of the turbocharger rotates at high speed during operation, and the oil in the cooling chamber adheres to the shaft. Driven by the rotational kinetic energy of the rotor shaft, the oil adhering to the rotor shaft will splash everywhere. Through the design of the oil-throwing boss, the oil on the rotor shaft can be splashed onto the inner wall of the first oil chamber, thereby taking away some heat and accelerating the heat dissipation of the turbocharger intermediate shell body vortex end.
[0015] Beneficial effects
[0016] Compared with the prior art, the present invention has the following advantages:
[0017] This invention discloses an intermediate shell structure for improving turbocharger turbine end heat dissipation. By modifying the conventional horizontally arranged main oil passage into an inclined oil groove, the wall thickness between the inclined oil groove and the turbocharger intermediate shell body is increased. A first oil chamber is provided near the turbine end of the turbocharger intermediate shell body, and this first oil chamber is configured as a large L-shaped cavity. An oil-throwing boss is provided on the rotor shaft below the first oil chamber. During turbocharger operation, the rotor shaft rotates at high speed, and the oil in the cooling chamber adheres to the shaft. Driven by the kinetic energy of the rotor shaft's rotation, the oil adhering to the rotor shaft splashes in all directions. The oil-throwing boss design allows the oil on the rotor shaft to splash onto the inner wall of the first oil chamber, thereby carrying away some heat and accelerating the cooling of the turbocharger intermediate shell. The turbocharger features a vortex-end cooling system. This design allows for faster reduction of the temperature radiated outwards from the vortex end, even at high exhaust temperatures. This prevents oil coking in the vortex-end sealing ring and floating bearing due to insufficient heat dissipation. This turbocharger is better suited for engines used in power generation and construction machinery, which require high-performance engines with frequent transient loading and start-stop cycles. While traditional turbochargers use a horizontal main oil passage design, this innovative design, incorporating a slanted oil passage and an intermediate housing cavity, results in a larger vortex-end cavity. Furthermore, the high-speed rotation of the rotor shaft uses kinetic energy to propel lubricating oil to the surface of the first oil chamber, improving heat dissipation and significantly enhancing the turbocharger's reliability and durability. It is characterized by ease of use and wide applicability. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the main structure of the present invention;
[0019] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.
[0020] Wherein: 1-Turbocharger intermediate housing body, 2-Rotor shaft, 3-Oil inlet, 4-Inclined oil groove, 5-First oil chamber, 6-Oil inlet, 7-Oil slinger boss, 8-Sealing ring step, 9-Second oil chamber, 10-Cooling chamber, 11-Oil return port, 12-Floating bearing, 13-Sealing ring, 14-Divider oil passage. Detailed Implementation
[0021] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.
[0022] See Figures 1-2As shown, the present invention discloses an intermediate shell structure for improving turbocharger turbine end heat dissipation, comprising a turbocharger intermediate shell body 1, a rotor shaft 2 mounted on the turbocharger intermediate shell body 1, a cooling chamber 10 between the rotor shaft 2 and the turbocharger intermediate shell body 1, an oil inlet channel 3 located within the turbocharger intermediate shell body 1 above the rotor shaft 2, an inclined oil groove 4 connected to the lower end of the oil inlet channel 3, a branch oil channel 14 connected to the cooling chamber 10 at the bottom of the inclined oil groove 4, and a first oil chamber 5 connected to the cooling chamber 10 above the inclined oil groove 4. A sealing ring step 8 is provided on the shaft 2, and multiple sealing rings 13 are provided on the sealing ring step 8. The front end of the sealing ring step 8 is provided with an oil-throwing boss 7 for throwing the oil from the cooling chamber 10 to the first oil chamber 5. By setting the conventional horizontally arranged main oil passage into an inclined oil groove 4, the wall thickness between the inclined oil groove 4 and the turbocharger intermediate housing body 1 is increased. The first oil chamber 5 is set near the turbocharger intermediate housing body 1 at the turbine end, and the first oil chamber 5 is set into an L-shaped large cavity. By setting a sealing ring step 8 on the rotor shaft 2 below the first oil chamber 5, the sealing ring step 8 is provided with multiple sealing rings 13. With the oil-throwing boss 7 in place, the rotor shaft 2 rotates at high speed during turbocharger operation. The oil in the cooling chamber 10 adheres to the shaft. Driven by the kinetic energy of the rotor shaft 2's rotation, the oil adhering to the rotor shaft 2 will splash everywhere. Through the design of the oil-throwing boss 7, the oil on the rotor shaft 2 can be splashed onto the inner wall of the first oil chamber 5, thereby carrying away some heat and accelerating the heat dissipation of the turbocharger intermediate housing body volute. This turbocharger structure can reduce the temperature radiated outward from the volute more quickly when the exhaust temperature is very high, avoiding the problem of oil coking in the volute sealing ring 13 and floating bearing 12 due to insufficient heat dissipation at high temperatures. This turbocharger is better suited for engines with high requirements for transient loading and frequent start-stop in power generation and construction machinery. The traditional turbocharger main oil passage oil groove adopts a horizontal structure design. By improving the main oil passage into an inclined oil groove 4 and the innovative design of the intermediate housing cavity, the volute cavity is made larger. At the same time, the kinetic energy of the high-speed rotation of the rotor shaft 2 is used to throw the lubricating oil onto the surface of the first oil chamber 5, resulting in better heat dissipation and greatly improving the reliability and durability of the turbocharger.
[0023] Specifically, the turbocharger intermediate housing body 1 below the rotor shaft 2 is provided with a second oil chamber 9 that communicates with the cooling chamber 10. The bottom of the second oil chamber 9 is provided with an oil return port 11. Cooling oil flows from the cooling chamber 10 into the second oil chamber 9, absorbs heat in the second oil chamber 9, and is discharged from the oil return port 11, which plays a role in cooling the turbocharger intermediate housing body 1.
[0024] Preferably, the first oil chamber 5 is L-shaped, which can be set to the largest possible size in the limited space, so that the oil splashed onto the first oil chamber 5 can be fully cooled, resulting in better heat dissipation. The oil inlet 6 of the first oil chamber 5 is located above the oil-slinging protrusion 7, which makes it easier to splash more oil onto the first oil chamber 5.
[0025] Furthermore, the height of the oil-throwing boss 7 is 1 / 2 to 4 / 5 of the height difference between the rotor shaft 2 and the sealing ring step 8, ensuring that the oil-throwing boss 7 can effectively throw oil into the first oil chamber 5, thereby effectively improving the heat dissipation effect.
[0026] Furthermore, the inclined oil groove 4 has an inclination angle of 3° to 6°, which provides sufficient space for designing the first oil chamber 5.
[0027] Furthermore, the rotor shaft 2 is rotatably mounted on the turbocharger intermediate housing body 1 via the floating bearing 12. The oil outlet of the oil distribution channel 14 is arranged above the floating bearing 12, effectively dissipating heat from the floating bearing 12, ensuring its normal operation, and extending its service life.
[0028] A method for improving heat dissipation at the turbine end of a turbocharger, the specific operating steps of which are as follows:
[0029] S1: By setting the original main oil passage as an inclined oil groove 4, the wall thickness between the inclined oil groove 4 and the turbocharger intermediate shell body 1 is increased, providing sufficient space for setting the oil cavity.
[0030] S2: A first oil chamber 5 is provided at the intermediate shell body 1 of the turbocharger near the vortex end, and the first oil chamber 5 is configured as an L-shaped large cavity.
[0031] S3: By setting an oil-throwing boss 7 on the rotor shaft below the first oil chamber 5, the rotor shaft 2 of the turbocharger rotates at high speed during operation. The oil in the cooling chamber 10 adheres to the shaft. Driven by the rotational kinetic energy of the rotor shaft 2, the oil adhering to the rotor shaft 2 will splash everywhere. Through the design of the oil-throwing boss 7, the oil on the rotor shaft 2 can be splashed onto the inner wall of the first oil chamber 5, thereby taking away some heat, accelerating the heat dissipation of the turbocharger intermediate shell body 1 at the volute end, and reducing the coking of the sealing ring and the floating bearing near the volute end due to the inability to dissipate heat in time at high temperature.
[0032] In this embodiment, an intermediate shell structure for improving turbocharger turbine end heat dissipation is used. During operation, the turbocharger rotor shaft 2 rotates at high speed, and the oil in the cooling chamber 10 adheres to the shaft. Driven by the rotational kinetic energy of the rotor shaft 2, the oil adhering to the rotor shaft 2 splashes everywhere. Through the design of the oil-slinging boss 7, the oil on the rotor shaft 2 can be splashed onto the inner wall of the first oil chamber 5, thereby carrying away some heat and accelerating the turbine end heat dissipation of the turbocharger intermediate shell body. Turbochargers with this structure can reduce the temperature radiated outward from the turbine end more quickly when the exhaust temperature is very high, avoiding the problem of oil coking due to insufficient heat dissipation of the turbine end sealing ring 13 and floating bearing 12 at high temperatures. The method and intermediate shell structure for improving turbocharger turbine end heat dissipation of this invention effectively improve the turbocharger turbine end heat dissipation capacity, reduce the risk of oil coking, and has the characteristics of wide applicability and strong practicality.
[0033] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.
Claims
1. A turbocharger intermediate shell structure for improving turbocharger turbine end heat dissipation, comprising a turbocharger intermediate shell body (1), wherein a rotor shaft (2) is provided on the turbocharger intermediate shell body (1), and a cooling cavity (10) is provided between the rotor shaft (2) and the turbocharger intermediate shell body (1), characterized in that, An oil inlet channel (3) is provided in the intermediate housing body (1) of the turbocharger above the rotor shaft (2). The lower end of the oil inlet channel (3) is connected to an inclined oil groove (4). The bottom of the inclined oil groove (4) is provided with an oil distribution channel (14) connected to the cooling chamber (10). The upper part of the inclined oil groove (4) is provided with a first oil chamber (5) connected to the cooling chamber (10). A sealing ring step (8) is provided on the rotor shaft (2). A plurality of sealing rings (13) are provided on the sealing ring step (8). The front end of the sealing ring step (8) is provided with an oil-throwing boss (7) for throwing the oil from the cooling chamber (10) to the first oil chamber (5).
2. The intermediate shell structure for improving heat dissipation at the turbocharger turbine end according to claim 1, characterized in that, The turbocharger intermediate housing body (1) below the rotor shaft (2) is provided with a second oil chamber (9) that communicates with the cooling chamber (10), and the bottom of the second oil chamber (9) is provided with an oil return port (11).
3. The intermediate shell structure for improving heat dissipation at the turbocharger turbine end according to claim 1, characterized in that, The first oil chamber (5) is L-shaped, and the oil inlet (6) of the first oil chamber (5) is located above the oil-throwing protrusion (7).
4. The intermediate shell structure for improving heat dissipation at the turbocharger turbine end according to claim 3, characterized in that, The height of the oil-throwing boss (7) is 1 / 2 to 4 / 5 of the height difference between the rotor shaft (2) and the sealing ring step (8).
5. The intermediate shell structure for improving heat dissipation at the turbocharger turbine end according to claim 1, characterized in that, The inclined oil groove (4) has an inclination angle of 3° to 6°.
6. The intermediate shell structure for improving heat dissipation at the turbocharger turbine end according to claim 1, characterized in that, The rotor shaft (2) is rotatably mounted on the intermediate housing body (1) of the turbocharger via a floating bearing (12), and the oil outlet of the oil distribution channel (14) is arranged above the floating bearing (12).
7. A method for improving heat dissipation at the turbine end of a turbocharger, characterized in that, The specific steps are as follows: S1: By setting the original main oil passage into an inclined oil groove (4), the wall thickness between the inclined oil groove (4) and the turbocharger intermediate shell body (1) is increased, providing sufficient space for setting the oil cavity. S2: A first oil chamber (5) is provided at the turbocharger intermediate shell body (1) near the vortex end, and the first oil chamber (5) is configured as an L-shaped large cavity; S3: By setting an oil-throwing boss (7) on the rotor shaft below the first oil chamber (5), the rotor shaft (2) of the turbocharger rotates at high speed during operation. The oil in the cooling chamber (10) adheres to the shaft. Driven by the rotational kinetic energy of the rotor shaft (2), the oil adhering to the rotor shaft (2) will splash everywhere. Through the design of the oil-throwing boss (7), the oil on the rotor shaft (2) can be splashed onto the inner wall of the first oil chamber (5), thereby taking away some heat and accelerating the heat dissipation of the turbocharger intermediate shell body (1) vortex end.