A heat-resistant scroll case based on a turbocharger

Abstract

The utility model relates to a kind of heat-resistant scroll case based on turbocharger, and the heat-resistant scroll case of turbocharger is cast with nodular cast iron, annular water channel (width 5-8mm) of ring around flow channel is equipped inside, four groups of water inlet and outlet holes are equipped, and the cooling mode of two groups is realized to realize lower inlet and outlet and staggered arrangement.The main body thickness of scroll case is 5-10mm, water inlet and outlet hole spacing is 10-20mm, and plug bolt sealing can be used when not using.The heat-resistant scroll case of the new type effectively reduces scroll case working temperature, surface temperature can be controlled to reduce about 300 DEG C than traditional scroll case under high load, significantly improve reliability and service life, there is no deformation, no crack under continuous working condition, while compared with the cost of replacing temperature-resistant cast steel material, the quality increase brought by new structure is more acceptable in market compared with medium and heavy truck;Processing efficiency, processing tool requirements and so on are better than cast steel material.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a heat-resistant vortex housing based on a turbocharger. Background Technology

[0002] With increasingly stringent engine emission standards, increasing power output while maintaining the same displacement leads to a significant increase in exhaust temperature. Especially in large-displacement heavy-duty trucks, exhaust temperature rises by approximately 200°C–350°C compared to normal operating conditions, exceeding the long-term temperature resistance limit of ordinary ductile iron turbine housing materials, posing a severe challenge to the service life and operational safety of turbochargers.

[0003] To address this issue, existing technologies include using high-temperature resistant materials (such as cast stainless steel) to replace ductile iron. However, these materials are expensive, difficult to process, and not conducive to controlling the overall cost of the machine, resulting in low market acceptance.

[0004] Therefore, there is an urgent need for a turbocharger volute structure that can effectively control the operating temperature of the volute without significantly increasing manufacturing costs, making it suitable for high-temperature exhaust environments. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a heat-resistant vortex housing based on a turbocharger. The vortex housing is made of ductile iron, and the interior of the vortex housing is provided with a water channel feature arranged around its flow channel. The water channel feature is an annular water channel surrounding the flow channel of the vortex housing. The annular water channel has four water inlet and outlet holes, namely a first water inlet and outlet hole, a second water inlet and outlet hole, a third water inlet and outlet hole, and a fourth water inlet and outlet hole. The first water inlet and outlet hole and the fourth water inlet and outlet hole form one group, and the second water inlet and outlet hole and the third water inlet and outlet hole form another group. In use, it follows the principle of bottom inlet and top outlet and staggered arrangement, that is, water enters through the first water inlet and outlet hole and exits through the fourth water inlet and outlet hole, or water enters through the second water inlet and outlet hole and exits through the third water inlet and outlet hole.

[0006] In one embodiment of this utility model, when a certain set of inlet and outlet water holes is not used, the empty inlet and outlet water holes are sealed by plug bolts.

[0007] In one embodiment of this utility model, the water channel feature is connected to the engine cooling system through inlet and outlet water pipes, and the cooling water is circulated by the engine water pump.

[0008] In one embodiment of this utility model, the annular water channel is arranged to completely surround the flow channel of the vortex shell, forming a covered cooling structure, wherein the main wall thickness of the vortex shell is 5-10mm, and the width of the annular water channel is 5-8mm.

[0009] In one embodiment of this utility model, the height distance between the center lines of the first water inlet / outlet and the fourth water inlet / outlet is 10-20mm, and the height distance between the center lines of the second water inlet / outlet and the third water inlet / outlet is 10-20mm.

[0010] Compared with the prior art, the above-mentioned technical solution of this utility model has the following advantages: The heat-resistant turbine housing described in this utility model effectively reduces the working temperature of the turbine housing. Under high load, the surface temperature can be controlled to be about 300°C lower than that of the traditional turbine housing, which significantly improves reliability and service life. There is no deformation or cracking under continuous working conditions. At the same time, compared with replacing the heat-resistant cast steel material, the cost increase is small. The increase in weight brought by the new structure is more acceptable to the market for medium and heavy-duty trucks. The processing efficiency and processing tool requirements are better than those of cast steel materials. Attached Figure Description

[0011] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0012] Figure 1 This is a schematic diagram of the heat-resistant volute housing based on a turbocharger according to this utility model;

[0013] Figure 2 This is a cross-sectional view of the annular water channel inside the heat-resistant vortex shell described in this utility model.

[0014] As shown in the figure, 1 is the first water inlet / outlet; 2 is the second water inlet / outlet; 3 is the third water inlet / outlet; and 4 is the fourth water inlet / outlet. Detailed Implementation

[0015] like Figure 1 As shown, this embodiment provides a heat-resistant turbine housing based on a turbocharger. The turbine housing is made of ductile iron, which has high structural strength and controllable cost. Its core improvement lies in the fact that an annular water channel for enveloping cooling is arranged inside the turbine housing around the gas flow channel.

[0016] The annular waterway has four water holes, which are marked as first water inlet 1, second water inlet 2, first water outlet 3 and second water outlet 4.

[0017] The water channel feature is connected to the engine's cooling system (such as radiator and water pump) through external pipes. The engine water pump drives the coolant to circulate continuously in the volute water channel, thereby carrying away a large amount of heat.

[0018] Figure 2 The cross-sectional structure of the annular waterway shown is Figure 1The heat-resistant vortex casing is obtained by symmetrical plane sectioning from a top-down view; in practical applications, different inlet and outlet water combinations can be selected according to the installation angle of the turbocharger on the engine. Following the principle of "bottom inlet, top outlet, staggered arrangement," the following can be selected:

[0019] Combination 1: Water enters through the first inlet hole 1 and exits through the second outlet hole 4; Combination 2: Water enters through the second inlet hole 2 and exits through the first outlet hole 3.

[0020] Furthermore, the two unused water holes are reliably sealed with plug bolts to ensure the airtightness of the cooling system.

[0021] In this embodiment, the heat-resistant turbine housing contains a coolant that flows in through a lower inlet hole. As the coolant flows through the entire channel surrounding the turbine housing, it effectively absorbs heat from the housing wall and finally flows out through a higher outlet hole, returning to the engine cooling system for heat dissipation. This cycle effectively reduces the operating temperature of the turbine housing by more than 300°C, allowing the relatively inexpensive ductile iron material to meet the requirements of high-temperature operation, while avoiding the economic burden of replacing it with a more expensive heat-resistant material.

[0022] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A heat-resistant turbine housing based on a turbocharger, said turbine housing being made of ductile iron, characterized in that: The vortex shell is provided with a water channel feature arranged around its flow channel. The water channel feature is an annular water channel surrounding the flow channel of the vortex shell. The annular water channel is provided with four water inlet and outlet holes, namely the first water inlet and outlet hole (1), the second water inlet and outlet hole (2), the third water inlet and outlet hole (3), and the fourth water inlet and outlet hole (4). The first water inlet and outlet hole (1) and the fourth water inlet and outlet hole (4) form one group, and the second water inlet and outlet hole (2) and the third water inlet and outlet hole (3) form another group. When in use, the principle of bottom inlet and top outlet and staggered arrangement is followed.

2. The heat-resistant vortex shell according to claim 1, characterized in that: When a set of inlet and outlet holes is not in use, the unused inlet and outlet holes are sealed with plug bolts.

3. The heat-resistant vortex shell according to claim 1, characterized in that: The water channel feature is connected to the engine cooling system through inlet and outlet water pipes, and the cooling water is circulated by the engine water pump.

4. The heat-resistant vortex shell according to claim 1, characterized in that: The annular water channel is arranged to completely surround the flow channel of the vortex shell, forming a covered cooling structure, wherein the main wall thickness of the vortex shell is 5-10mm and the width of the annular water channel is 5-8mm.

5. The heat-resistant vortex shell according to claim 1, characterized in that: The height distance between the center lines of the first water inlet / outlet hole (1) and the fourth water inlet / outlet hole (4) is 10-20mm, and the height distance between the center lines of the second water inlet / outlet hole (2) and the third water inlet / outlet hole (3) is 10-20mm.

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