Combined water-cooled bearing body structure of turbocharger

Abstract

The invention provides a combined water-cooled bearing body structure of a turbocharger. The combined water-cooled bearing body structure comprises a bearing body and a water-cooled jacket, the two are connected with each other through bolts to form a water-cooling cavity inside; the bearing body is provided with two water inlet and return ports; a water inlet and return blocking table is arranged in the water cooling cavity; and a sealing ring is arranged between the bearing body and the water-cooled jacket. According to the invention, the bearing body and the water-cooling cavity are separately processed, so that the technical problems of poor stress of a sand core, difficulty in mold drawing and the like during casting of the water-cooling cavity are effectively avoided, and the reliability of the bearing body structure is effectively improved.

Description

Technical Field

[0001] The invention belongs to the field of engines, and in particular relates to a combined water-cooled bearing body structure of a turbocharger. Background Art

[0002] Turbochargers play an important role in improving engine power performance. As the engine power density increases, the exhaust temperature of the engine also increases accordingly. In order to improve the adaptability of turbochargers in high temperature and harsh environments, the working temperature of the turbine end parts is generally improved by water cooling the bearing body of the turbocharger. Due to the complex structure of the bearing body, it needs to be processed by casting. Adding a water cooling structure poses a great challenge to casting, which can easily cause problems such as sand core deformation and difficulty in demolding. In addition, it is necessary to increase the casting process holes, making the component structure more complicated and increasing the failure rate. Therefore, it is of great significance to design a water-cooled bearing body with a simple structure and easy processing.

[0003] Since the supercharger is prone to oil coking and turbine end sealing ring failure when running at high temperature, many current bearing bodies are cooled by adding water cooling cavities to the bearing seat and turbine end to achieve lubrication and cooling of the sealing structure. Patents CN203640779 U, CN 218953388 U, CN 220227033 U, and CN116181480A all propose various forms of water-cooled bearing body structures, which mainly add water cooling cavities at the turbine end of the bearing body to achieve cooling of the turbine end bearing and sealing ring. Patent CN 204646334U proposes a water-cooled bearing body structure, which arranges the water cooling cavity by integral casting, and adds two casting process holes, which are blocked by plugs after processing. Patent CN 217783577U proposes a segmented aluminum water-cooled bearing body, which divides the bearing body into two sections, front and rear, and provides an annular water-cooling chamber at the middle bearing seat of the bearing body, which can achieve the goals of short development cycle, fast finished product delivery, low customization cost and light finished product quality.

[0004] In summary, cooling the supercharger by adding a water-cooling structure to the bearing body is a relatively mature technology, but the structure and form of the water-cooled bearing body are diverse, and most of the water-cooled bearing bodies need to be processed by one-piece casting, which leads to a series of problems such as great casting difficulty and low yield rate, and increases the failure rate of the finished product. Summary of the invention

[0005] In view of this, the present invention aims to propose a combined water-cooled bearing body structure for a turbocharger. By separately processing the bearing body and the water-cooling cavity, the process problems such as poor sand core force and difficulty in demolding during water-cooling cavity casting are effectively avoided, and the reliability of the bearing body structure is effectively improved.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A combined water-cooled bearing body structure for a turbocharger comprises a bearing body and a water-cooling jacket; the two are connected to each other by bolts, and a water-cooling cavity is formed inside;

[0008] The bearing body is provided with two water inlet and return interfaces;

[0009] The water cooling cavity is provided with a water inlet and return baffle;

[0010] A sealing ring is arranged between the bearing body and the water cooling jacket.

[0011] Furthermore, the water inlet and return baffle is arranged between the two water inlet and return interfaces.

[0012] Furthermore, the water cooling jacket is matched with the vortex end of the bearing, and the water cooling jacket is provided with a large round end and a small round end, the large round end is matched with the end surface of the bearing body; the small round end is matched with the circumferential surface of the vortex end of the bearing body.

[0013] Furthermore, the sealing ring includes an axial sealing ring and a radial sealing ring; the end surface of the bearing body is provided with a No. 1 sealing groove, the No. 1 sealing groove is provided with an axial sealing ring, and the large circular end surface of the water cooling jacket is connected to the bearing body through the axial sealing ring;

[0014] A No. 2 sealing groove is formed between the vortex end of the bearing body and the water cooling jacket; a radial sealing ring is arranged in the No. 2 sealing groove, and the small round end of the water cooling jacket cooperates with the vortex end of the bearing body through the radial sealing ring.

[0015] Furthermore, at the No. 2 sealing groove near the turbine end, an inclined groove is formed between the bearing body and the water-cooling jacket, and the inclined groove enables the cooling water of the water-cooling cavity to contact the radial sealing ring.

[0016] Compared with the prior art, the combined water-cooled bearing structure of a turbocharger described in the present invention has the following advantages:

[0017] (1) The present invention provides a combined water-cooled bearing body structure for a turbocharger, which adopts a method of separately processing the bearing body and the water-cooling sleeve, thereby avoiding process problems such as poor stress on the sand core of the water-cooling cavity and difficulty in demolding when the water-cooled bearing body is cast as a whole, and improving the casting yield.

[0018] (2) The combined water-cooled bearing structure of a turbocharger of the present invention can ensure good circulation of the cooling medium in the bearing body by arranging a water-conducting structure such as a baffle in the water-cooling chamber, thereby achieving a better heat dissipation effect.

[0019] (3) The present invention provides a combined water-cooled bearing body structure for a turbocharger. After the water-cooled bearing body adopts a combined structure, the water-cooling jacket can be machined to reduce the wall thickness of the water-cooling cavity. At the same time, the process hole structure required for integral casting is avoided, and the structure is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of an exploded structure of a combined water-cooled bearing body of a turbocharger according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the structure of a combined water-cooled bearing body of a turbocharger according to an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1. Bearing body; 2. Water cooling jacket; 3. Radial sealing ring; 4. Axial sealing ring; 5. Bolt; 6. Inclined groove; 7. Inlet and return water baffle; 8. Inlet and return water interface. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] A combined water-cooled bearing structure for a turbocharger, such as Figure 1 Figure 2 As shown, it includes a bearing body 1 and a water cooling jacket 2; the two are connected to each other by bolts 5, and a water cooling cavity is formed inside;

[0030] The bearing body 1 can be processed by casting, and the water cooling jacket 2 can be processed by machining. The bearing body 1 and the water cooling jacket 2 are matched with shaft hole clearance at the matching surface to ensure that the water cooling jacket 2 can be installed in the bearing body 1.

[0031] The bearing body 1 is provided with two water inlet and return interfaces 8;

[0032] The water-cooling cavity is provided with a water inlet and return baffle 7; preferably, the water inlet and return baffle 7 is arranged between two water inlet and return interfaces 8; to ensure that the cooling water circulates fully in the water-cooling cavity to achieve the best cooling effect;

[0033] A sealing ring is provided between the bearing body 1 and the water cooling jacket 2 .

[0034] Preferably, the water cooling jacket 2 is matched with the turbine end of the bearing, and the water cooling jacket 2 is provided with a large round end and a small round end, the end surface of the large round end is matched with the bearing body 1; the small round end is matched with the circumferential surface of the turbine end of the bearing body 1.

[0035] Preferably, the sealing ring includes an axial sealing ring 4 and a radial sealing ring 3; a No. 1 sealing groove is provided on the end face of the bearing body 1, and an axial sealing ring 4 is provided in the No. 1 sealing groove; the large circular end face of the water-cooling jacket 2 is connected to the bearing body 1 through the axial sealing ring 4; the sealing of the water-cooling cavity at the mating end face can be achieved.

[0036] A No. 2 sealing groove is formed between the vortex end of the bearing body 1 and the water-cooling jacket 2; a radial sealing ring 3 is provided in the No. 2 sealing groove, and the small round end of the water-cooling jacket 2 cooperates with the vortex end of the bearing body 1 through the radial sealing ring 3 to achieve sealing of the vortex end water-cooling cavity.

[0037] Preferably, at the No. 2 sealing groove near the turbine end, an inclined groove 6 is formed between the bearing body 1 and the water-cooling jacket 2 , and the inclined groove 6 enables the cooling water of the water-cooling cavity to contact the radial sealing ring 3 .

[0038] Since the turbine end temperature of the bearing body 1 is relatively high, in order to ensure that the radial sealing ring 3 does not deform at high temperatures, the bearing body 1 is provided with an inclined groove 6 at the radial sealing ring 3 to connect the water cooling cavity with the sealing groove. After the cooling water passes through the water cooling cavity, a small part of it flows to the sealing ring through the inclined groove 6 to achieve effective cooling of the radial sealing ring 3.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined water-cooled bearing structure for a turbocharger, characterized in that: It includes a bearing body and a water cooling jacket; the two are connected to each other by bolts, and a water cooling cavity is formed inside; The bearing body is provided with two water inlet and return interfaces; The water cooling cavity is provided with a water inlet and return baffle; A sealing ring is arranged between the bearing body and the water cooling jacket.

2. The combined water-cooled bearing structure of a turbocharger according to claim 1, characterized in that: The inlet and return water baffle is arranged between the two inlet and return water interfaces.

3. The combined water-cooled bearing structure of a turbocharger according to claim 1, characterized in that: The water cooling jacket is matched with the vortex end of the bearing. The water cooling jacket is provided with a large round end and a small round end. The large round end is matched with the end surface of the bearing body; the small round end is matched with the circumferential surface of the vortex end of the bearing body.

4. The combined water-cooled bearing structure of a turbocharger according to claim 3, characterized in that: The sealing ring includes an axial sealing ring and a radial sealing ring; the end surface of the bearing body is provided with a No. 1 sealing groove, the No. 1 sealing groove is provided with an axial sealing ring, and the large circular end surface of the water cooling jacket is connected to the bearing body through the axial sealing ring; A No. 2 sealing groove is formed between the vortex end of the bearing body and the water cooling jacket; a radial sealing ring is arranged in the No. 2 sealing groove, and the small round end of the water cooling jacket cooperates with the vortex end of the bearing body through the radial sealing ring.

5. The combined water-cooled bearing structure of a turbocharger according to claim 4, characterized in that: At the No. 2 sealing groove near the turbine end, an inclined groove is formed between the bearing body and the water cooling jacket, and the inclined groove enables the cooling water of the water cooling cavity to contact the radial sealing ring.

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