Novel turbocharger

Abstract

The utility model discloses a novel turbocharger which comprises a gas compressor volute, a bearing body and a turbine box. The left end and the right end of the bearing body are in sealed connection with the gas compressor volute and the turbine box correspondingly. Two full-floating bearings are arranged in the bearing body; a turbine rotating shaft is pivoted in the full-floating bearing; the upper part of the bearing body is provided with a bent oil inlet channel; an oil inlet formed in the lower end of the oil inlet channel communicates with a top opening in the left end of the lubricating oil way. An oil return cavity is formed in the lower part of a shell of the bearing body; an oil return hole is formed in the bottom of the oil return cavity; and a water cooling cavity is formed in the bearing body. The supercharger is provided with the oil return cavity and the water cooling cavity, the two ends of the water cooling cavity are connected with the water inlet and the water outlet, the internal space can be effectively utilized, the structure is more compact, the efficient heat dissipation effect can be achieved in the limited space, and the overall space of the supercharger is saved; according to the utility model, the problems of incompact structure, large volume and the like of the water-cooling row can be solved, and the effects of compact structure and small volume are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust gas turbochargers, in particular to a novel turbocharger. Background Art

[0002] At present, the requirements for the power performance of internal combustion engines are getting higher and higher, and the role of a supercharger is to provide a strong air pressure for the internal combustion engine, thereby improving the performance and power output of the engine.

[0003] For an exhaust gas turbocharger, it can increase the power of an internal combustion engine under the same displacement. By recovering the combustion exhaust gas of the internal combustion engine and utilizing the energy of the exhaust gas discharged from the internal combustion engine, it drives the turbine of the supercharger to do work, and then the turbine drives a coaxial centrifugal compressor to pre-compress the air entering the cylinder, increasing the air density, so that more fuel can be burned, and finally enabling the internal combustion engine to generate greater power.

[0004] Due to the characteristics of increasing the power of the engine, reducing fuel consumption, and reducing emissions, turbochargers are currently widely used as power auxiliary devices on engines. Structural compactness is of great significance in many industrial and technological fields. It can improve the efficiency of the system, reduce energy consumption, and help reduce the volume and weight of equipment. The lightweight and miniaturization of engines have become a new trend. For superchargers, greater integration is required, and it is essential to pursue the ultimate design of products.

[0005] However, the existing structural design of turbochargers is unreasonable, and effective heat dissipation cannot be achieved within a limited space, affecting the overall service life of the turbocharger.

[0006] In addition, the bearing housing of a turbocharger is an important component in the supercharger structure. While it supports the floating bearing, it provides a lubrication space for shafting components including the floating bearing, ensures the lubrication effect, and reduces the friction coefficient of the shafting components during movement. However, the existing structural design of the bearing housing is unreasonable, the assembly is inconvenient, and it requires more installation space, which is not conducive to the miniaturization of the supercharger.

[0007] Therefore, there is an urgent need to develop a technology that can solve the above technical problems. Summary of the Utility Model

[0008] The purpose of the utility model is to provide a novel turbocharger in view of the technical defects existing in the prior art.

[0009] To this end, the utility model provides a novel turbocharger, which includes: a compressor volute, a bearing housing, and a turbine housing;

[0010] The left and right ends of the bearing body are respectively and sealingly connected to the hollow compressor volute and the hollow turbine housing;

[0011] There are two full-floating bearings arranged at intervals from left to right inside the bearing body;

[0012] Inside the full-floating bearing, a laterally distributed turbine rotating shaft is pivotally connected;

[0013] On the radially outer wall of the left end of the turbine rotating shaft, a circumferentially distributed compressor impeller is arranged;

[0014] On the radially outer wall of the right end of the turbine rotating shaft, a circumferentially distributed turbine impeller is arranged;

[0015] On the upper part of the bearing body, a curved oil inlet passage is arranged;

[0016] The oil inlet at the lower end of the oil inlet passage is communicated with the top opening at the left end of the laterally distributed lubricating oil path;

[0017] The lubricating oil path is located inside the housing of the bearing body;

[0018] On the lower part of the housing of the bearing body, a hollow oil return cavity is arranged;

[0019] At the bottom of the oil return cavity, an oil return hole is arranged;

[0020] Inside the bearing body, a hollow water cooling cavity is arranged at intervals in the outer direction of the right full-floating bearing;

[0021] The oil inlet and the oil return hole are both located on the oil inlet and return flange at the bottom of the bearing body.

[0022] As can be seen from the technical solutions provided by the present utility model above, compared with the prior art, the present utility model provides a new type of turbocharger, which is scientifically designed, with an oil return cavity and a water cooling cavity arranged inside. The sealed water cooling cavity is connected to the water inlet and the water outlet at both ends, which can effectively utilize the internal space, and the structural design is more compact, and an efficient heat dissipation effect can be achieved in a limited space, saving the overall space of the turbocharger, and having great practical significance.

[0023] In addition, for the present utility model, it can solve the problems of the water cooling row being not compact in structure and large in volume, etc., and achieve the effects of being compact in structure and small in volume, which is beneficial to the miniaturization of the turbocharger, solve the problems of complex installation, unreasonable distribution, insufficient operation space for workers, etc., and achieve the effects of being compact in structure and reducing the occupied area.

[0024] In addition, compared with the prior art, the structure of the original intermediate body (i.e., the bearing body) is complex to clamp. By applying the technical solution of the present utility model, the assembly is convenient, the installation space of the entire intermediate body can be effectively reduced, the limitation of the system space layout can be solved, and the installability of the turbocharger can be improved.

[0025] In addition, for the supercharger of the present utility model, by arranging the oil inlet downward and the oil inlet passage around from the outside of the oil return cavity to the directly above, and integrating the oil inlet and return holes on the same flange, it can effectively save the external pipeline connection space of the supercharger, make the assembly convenient, and is suitable for a compact structure. At the same time, it has a certain oil storage and filtering function.

[0026] By applying the technical solution of the present utility model, the installation layout of the oil inlet and return pipelines can be effectively simplified, the internal space can be effectively utilized, thereby saving the overall space of the supercharger and realizing the miniaturization of the supercharger. To a certain extent, it reduces the entry of sundries or sediment into the lubrication system.

[0027] For the present utility model, it has carried out the integrated design of the oil inlet and return system, which has greatly improved the compactness and space layout, and at the same time greatly simplifies the installation, is beneficial to meeting the miniaturization requirements of special vehicles, and has great significance.

[0028] The turbocharger of the present utility model can integrate the oil inlet and return pipelines of the bearing body onto one flange, with a compact structure, can effectively utilize the overall space of the supercharger, and further save the external pipeline layout space of the supercharger, realizing the miniaturization of the supercharger. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The front view of a new type of turbocharger provided by the present utility model;

[0030] Figure 2 The bottom view of the bearing body of a new type of turbocharger provided by the present utility model;

[0031] Figure 3 The top view of the bearing body of a new type of turbocharger provided by the present utility model;

[0032] Figure 4 is the cross-sectional view along the Figure 1 indicated A-A line;

[0033] Figure 5 is the cross-sectional view along the Figure 3 indicated B-B line;

[0034] Figure 6 is the cross-sectional view along the Figure 5 indicated C-C line;

[0035] Figure 7 is the cross-sectional view along the Figure 5 indicated D-D line. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0037] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model.

[0038] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise clearly specifically defined.

[0040] See Figures 1 to 7 , the present utility model provides a new type of turbocharger, including: a compressor volute 10, a bearing housing 1, and a turbine housing 2;

[0041] The left and right ends of the bearing housing 1 are respectively hermetically connected to the hollow compressor volute 10 and the hollow turbine housing 2;

[0042] Two full-floating bearings 11 are arranged at intervals left and right in the bearing housing 1;

[0043] Inside the full-floating bearing 11 (specifically, the inner ring), a laterally distributed turbine rotating shaft 9 is pivotally connected (i.e., rotatably arranged);

[0044] On the left end radial outer wall of the turbine rotating shaft 9, there is a compressor impeller 8 arranged in a circumferential distribution.

[0045] On the right end radial outer wall of the turbine rotating shaft 9, there is a turbine impeller 3 arranged in a circumferential distribution.

[0046] On the upper part of the bearing body 1, there is an oil inlet channel 1-2 arranged in a curved distribution.

[0047] The oil inlet 1-6 at the lower end of the oil inlet channel 1-2 is connected to the top opening at the left end of the horizontally arranged lubricating oil path 1-4.

[0048] The lubricating oil path 1-4 is located inside the housing of the bearing body 1.

[0049] See also Figure 5 As shown, in the lower part of the housing of the bearing body 1, there is a hollow oil return cavity 1-5.

[0050] At the bottom of the oil return cavity 1-5, there is an oil return hole 1-9.

[0051] Inside the bearing body 1, in the outer direction of the fully floating bearing 11 on the right side, there is a hollow water cooling cavity 1-3 arranged at intervals.

[0052] In the present utility model, specifically in implementation, inside the bearing body 1, there are a horizontally arranged first fully floating bearing mounting hole 1-10 and a second fully floating bearing mounting hole 1-11.

[0053] The first fully floating bearing mounting hole 1-10 is located directly to the left of the second fully floating bearing mounting hole 1-11.

[0054] Inside the first fully floating bearing mounting hole 1-10 and the second fully floating bearing mounting hole 1-11, a fully floating bearing 11 is respectively installed, specifically including the fully floating bearing 11 at the compressor end on the left side and the fully floating bearing 11 at the turbine end on the right side.

[0055] Specifically in implementation, inside the bearing body 1, at the position between the first fully floating bearing mounting hole 1-10 and the second fully floating bearing mounting hole 1-11, there is a middle hole oil return hole 1-12.

[0056] The top of the oil return cavity 1-5 is connected to the first fully floating bearing mounting hole 1-10 and the second fully floating bearing mounting hole 1-11 respectively through the middle hole oil return hole 1-12.

[0057] Specifically in implementation, the oil return cavity 1-5 is located directly below the first fully floating bearing mounting hole 1-10 and the second fully floating bearing mounting hole 1-11.

[0058] In specific implementation, the left and right ends of the bottom of the lubricating oil circuit 1-4 are open, and are connected to the first full floating bearing mounting hole 1-10 and the second full floating bearing mounting hole 1-11 through an oil guide channel respectively;

[0059] In the present utility model, in specific implementation, the lubricating oil circuits 1-4 are horizontally distributed.

[0060] In the present utility model, in specific implementation, the oil inlet 1-6 and the oil return hole 1-9 are both located on the oil inlet and return flange 1-20 at the bottom of the bearing body 1;

[0061] It should be noted that, for the present invention, the oil inlet and return ports (including the oil inlet 1 - 6 and the oil return hole 1 - 9 ) of the bearing body 1 are located on the oil inlet and return flange 1 - 20 at the bottom of the bearing body 1 .

[0062] In specific implementation, the oil inlet 1-6 is connected to one end of the oil inlet pipe;

[0063] The other end of the oil inlet pipe is connected to the oil outlet of the existing engine lubricating oil system located outside;

[0064] Oil return hole 1-9, connected to one end of the oil return pipe;

[0065] The other end of the oil return pipe is connected to the existing engine oil pan located outside. It should be noted that the discharged lubricating oil returns to the engine oil pan through the oil return pipe, which can take away the heat generated when the bearing is working.

[0066] In a specific implementation, the cross-sectional shape of the oil return hole 1-9 is circular.

[0067] In the present utility model, the specific implementation is as follows: Figure 4 As shown, the oil inlet passages 1-2 are distributed around the front half of the bearing body 1 (ie, distributed around half a circle).

[0068] It should be noted that the oil inlet channel 1-2 goes around the oil chamber 1-5 half a circle from bottom to top, and then connects to the lubricating oil path 1-4.

[0069] In the present utility model, in a specific implementation, the oil inlet port at the upper end of the oil inlet channel 1-2 is connected to a threaded plug 1-1 (specifically, a threaded connection);

[0070] In the present invention, in a specific implementation, the cross-sectional shape of the middle (i.e., middle section) portion of the oil inlet channel 1-2 is semicircular or elliptical.

[0071] The cross-sectional shape of both end portions (i.e., the upper end portion and the lower end portion) of the oil inlet passage 1-2 is circular;

[0072] It should be noted that between the upper part and the lower part of the oil inlet passage 1-2, there is a middle section. The connection parts between the middle section and the upper part and the lower part (i.e., the circular cross-section part) adopt rounded corners for transition; the central scan line of the oil inlet passage 1-2 has a smooth transition to ensure the minimum wall thickness requirement with the inner wall of the oil cavity; the process hole (i.e., the oil injection port) above the oil inlet passage 1-2 is sealed by a threaded plug 1-1.

[0073] In the present utility model, in terms of specific implementation, refer to Figure 5 、 Figure 6 As shown, the first structural form of the water-cooling cavity 1-3 is as follows:

[0074] Inside the bearing body 1, radially outside the second fully floating bearing installation hole 1-11, a hollow water-cooling cavity 1-3 is provided, and the water-cooling cavity 1-3 is a cavity with a semi-circular ring shape in the longitudinal section;

[0075] In terms of specific implementation, the front and rear ends of the water-cooling cavity 1-3 are respectively connected to a water outlet 1-8 and a water inlet 1-7.

[0076] In terms of specific implementation, the second fully floating bearing installation hole 1-11 and the lubricating oil path 1-4 are both located in the inner direction of the water-cooling cavity 1-3.

[0077] In the present utility model, in terms of specific implementation, the second structural form of the water-cooling cavity 1-3 is as follows:

[0078] Inside the bearing body 1, radially outside the second fully floating bearing installation hole 1-11, two water-cooling cavities 1-3 are provided;

[0079] The two water-cooling cavities 1-3 are symmetrically distributed about the center;

[0080] One of the water-cooling cavities 1-3 is located directly in front of the other water-cooling cavity 1-3.

[0081] The two water-cooling cavities 1-3 are connected to each other.

[0082] In terms of specific implementation, the upper sides of the two water-cooling cavities 1-3 are connected to each other through an arc-shaped first connection channel;

[0083] The lower sides of the two water-cooling cavities 1-3 are connected to each other through an arc-shaped second connection channel.

[0084] In terms of specific implementation, the second fully floating bearing installation hole 1-11 is located between the two water-cooling cavities 1-3;

[0085] In terms of specific implementation, the lubricating oil path 1-4 is located between the two water-cooling cavities 1-3; therefore, the cooling water flowing through the water-cooling cavity 1-3 can timely and effectively cool the lubricating oil in the lubricating oil path.

[0086] In specific implementation, an outlet 1-8 is provided at the upper part of the front side of the bearing body 1;

[0087] The outlet 1-8 is communicated with the upper end of the water-cooling cavity 1-3 located at the front side;

[0088] At the lower part of the rear side of the housing 1, an inlet 1-7 is provided;

[0089] The inlet 1-7 is communicated with the lower end of the water-cooling cavity 1-3 located at the rear side;

[0090] In specific implementation, one end of the inlet pipe is connected to the inlet 1-7;

[0091] The other end of the inlet pipe is connected to the outlet of the external water circulation pipeline;

[0092] It should be noted that the circulating water in the water circulation pipeline has a certain temperature and pressure (a water pump is provided in the pipeline), which can take away the heat of the intermediate body (i.e., the bearing body) while prolonging the service life of the intermediate body (i.e., the bearing body).

[0093] In specific implementation, one end of the outlet pipe is connected to the outlet 1-8;

[0094] The other end of the outlet pipe is connected to the inlet of the external water circulation pipeline for drainage at this time.

[0095] It should be noted that for the water-cooling cavity 1-3 of the first structural form, its inlet 1-7 is also connected to the outlet of the external water circulation pipeline through an inlet pipe, and its outlet 1-8 is also connected to the inlet of the external water circulation pipeline through an outlet pipe.

[0096] In specific implementation, both the second full-floating bearing installation hole 111 and the lubricating oil path 1-4 are located in the inner direction of the water-cooling cavity 1-3.

[0097] In specific implementation, the front end of the water-cooling cavity 1-3 located at the front side is communicated with the outlet 1-8.

[0098] The rear end of the water-cooling cavity 1-3 located at the rear side is communicated with the inlet 1-7.

[0099] In the present utility model, in specific implementation, the cross-sectional shape of the oil injection port (i.e., the inlet) at the upper end of the oil inlet passage 1-2 of the bearing body 1 is circular;

[0100] In the present utility model, in specific implementation, the bottom of the oil return cavity 1-5 adopts a rounded corner transition.

[0101] In the present utility model, in specific implementation, a stepped hole 1-13 is provided in the transverse middle part of the turbine rotating shaft 9.

[0102] In the present utility model, in terms of specific implementation, the overall longitudinal cross-sectional shape of the oil return cavity 1-5 is a U shape with the opening facing downward.

[0103] In terms of specific implementation, the first fully floating bearing mounting hole 1-10 and the second fully floating bearing mounting hole 1-11 are located on the same horizontal central axis.

[0104] In the present utility model, in terms of specific implementation, the wall thickness of the bearing body 1 is 5 mm.

[0105] In the present utility model, it should be noted that the cross-sectional shape of the water-cooling cavity 1-3 above the lubricating oil path 1-4 can be adjusted according to the lubricating oil path 1-4 to ensure the minimum wall thickness requirements of the water-cooling cavity 1-3, the lubricating oil path 1-4, and the water inlet 1-7, which should be spaced apart from each other and maintain high strength.

[0106] In the present utility model, in terms of specific implementation, the oil return cavity 1-5 is located directly below the first fully floating bearing mounting hole 110 and the second fully floating bearing mounting hole 111, and the thickness requirements between the oil return cavity 1-5 and the outer wall of the housing of the water-cooling cavity 1-3 and the bearing body 1 should be spaced apart from each other and maintain high strength.

[0107] In the present utility model, in terms of specific implementation, the right side surface of the oil return cavity 1-5 is a stepped inclined surface.

[0108] In terms of specific implementation, the right side surface of the oil return cavity 1-5 is two inclined surfaces.

[0109] In the present utility model, in terms of specific implementation, a compression end seal structure is also provided between the compressor impeller 8 and the bearing body 1;

[0110] The compression end seal structure includes: a thrust bearing plate 4, an oil sealing cover 5, a shaft seal sleeve 6, an oil baffle 12, and a thrust spacer sleeve 7;

[0111] The shaft seal sleeve 6 is located on the left side of the thrust spacer sleeve 7;

[0112] The shaft seal sleeve 6 and the thrust spacer sleeve 7 are installed on the outer side of the left end of the turbine rotating shaft 9 in the radial direction;

[0113] The shaft seal sleeve 6 is located at the position between the compressor impeller 8 and the thrust spacer sleeve 7;

[0114] The oil sealing cover 5 and the oil baffle 12 are installed around the outer side of the radial periphery of the shaft seal sleeve 6;

[0115] The oil baffle 12 is located on the right side of the oil sealing cover 5.

[0116] It should be noted that the turbine rotating shaft 9 is supported by two floating bearings 11; a pressure end sealing structure is installed between the turbine rotating shaft 9 and the compressor impeller 8; the pressure end sealing structure is composed of a thrust bearing plate 4, an oil sealing cover 5, an oil baffle 12, a shaft seal sleeve 6 and a thrust spacer 7.

[0117] In summary, based on the above structural design, the temperature of the turbine rotating shaft sealing part in the turbocharger can be effectively reduced, the overall temperature of the intermediate body (i.e., the bearing body) can be reduced, and at the same time, the smooth return of the lubricating oil can be ensured.

[0118] It should be noted that the present utility model improves the structures of the water cooling cavity 1-3 and the oil return cavity 1-5. The lubricating oil has good fluidity, and the water cooling cavity has good cooling effect, avoiding uneven temperature distribution and reducing the temperature near the full floating bearing and the turbine end sealing ring (located on the turbine housing) installed in the intermediate body (i.e., the bearing body). The present utility model effectively ensures the working characteristics of the lubricating oil, that is, ensures the normal operation of the bearing system and improves the service life of the intermediate body.

[0119] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A new type of turbocharger, characterized in that, Comprising: A compressor volute (10), a bearing housing (1) and a turbine casing (2); The left and right ends of the bearing housing (1) are respectively and sealingly connected to the hollow compressor volute (10) and the hollow turbine casing (2); Two full-floating bearings (11) are arranged inside the bearing housing (1) at intervals in the left and right directions; Inside the full-floating bearing (11), a horizontally distributed turbine rotating shaft (9) is pivotally connected; On the outer wall of the left end of the turbine rotating shaft (9) in the radial direction, a circumferentially distributed compressor impeller (8) is arranged; On the outer wall of the right end of the turbine rotating shaft (9) in the radial direction, a circumferentially distributed turbine impeller (3) is arranged; On the upper part of the bearing housing (1), a bent oil inlet passage (1-2) is arranged; The oil inlet (1-6) at the lower end of the oil inlet passage (1-2) is communicated with the top opening at the left end of the horizontally distributed lubricating oil passage (1-4); The lubricating oil passage (1-4) is located inside the housing of the bearing housing (1); On the lower part of the housing of the bearing housing (1), a hollow oil return cavity (1-5) is arranged; At the bottom of the oil return cavity (1-5), an oil return hole (1-9) is arranged; Inside the bearing housing (1), a hollow water cooling cavity (1-3) is arranged at intervals in the outer direction of the right full-floating bearing (11); The oil inlet (1-6) and the oil return hole (1-9) are both located on the oil inlet and return flange (1-20) at the bottom of the bearing housing (1).

2. The novel turbocharger according to claim 1, wherein Inside the bearing housing (1), a horizontally distributed first full-floating bearing mounting hole (1-10) and a second full-floating bearing mounting hole (1-11) are arranged; The first full-floating bearing mounting hole (1-10) is located directly to the left of the second full-floating bearing mounting hole (1-11); Inside the first full-floating bearing mounting hole (1-10) and the second full-floating bearing mounting hole (1-11), a full-floating bearing (11) is respectively installed.

3. The novel turbocharger according to claim 2, characterized in that, Inside the bearing housing (1), at the position between the first full-floating bearing mounting hole (1-10) and the second full-floating bearing mounting hole (1-11), a middle hole oil return hole (1-12) is arranged; The top of the oil return cavity (1-5) is communicated with the first full-floating bearing mounting hole (1-10) and the second full-floating bearing mounting hole (1-11) respectively through the middle hole oil return hole (1-12); The oil return cavity (1-5) is located directly below the first full-floating bearing mounting hole (1-10) and the second full-floating bearing mounting hole (1-11).

4. The novel turbocharger according to claim 2, characterized in that, The bottom of the lubricating oil passage (1-4) has openings at the left and right ends, and is respectively communicated with the first full-floating bearing mounting hole (1-10) and the second full-floating bearing mounting hole (1-11) through a guiding oil passage; The first full-floating bearing mounting hole (1-10) and the second full-floating bearing mounting hole (1-11) are located on the same horizontal central axis.

5. The novel turbocharger according to any one of claims 1 to 4, characterized in that, The oil inlet (1-6) is connected to one end of an oil inlet pipe; The other end of the oil inlet pipe is communicated with the oil outlet of the engine lubricating oil system located outside; The oil return hole (1-9) is connected to one end of an oil return pipe; The other end of the oil return pipe is connected to the engine oil sump located outside.

6. The novel turbocharger according to any one of claims 1 to 5, characterized in that, The cross-sectional shape of the oil return hole (1-9) is circular; The oil injection port at the upper end of the oil inlet passage (1-2) is connected to a threaded plug (1-1).

7. The novel turbocharger according to claim 1, characterized in that, The overall longitudinal cross-sectional shape of the oil return cavity (1-5) is a U shape with the opening facing downwards; The right side surface of the oil return cavity (1-5) is a stepped inclined surface.

8. The novel turbocharger according to claim 1, characterized in that, The first structural form of the water cooling cavity (1-3) is as follows: Inside the bearing body (1), a hollow water cooling cavity (1-3) is provided radially outside the second fully floating bearing installation hole (1-11), and the water cooling cavity (1-3) is a cavity with a semi-circular ring-shaped longitudinal cross-section; The front and rear ends of the water cooling cavity (1-3) are respectively connected to a water outlet (1-8) and a water inlet (1-7).

9. The novel turbocharger according to claim 1, wherein The second structural form of the water cooling cavity (1-3) is as follows: Two water cooling cavities (1-3) are provided radially outside the second fully floating bearing installation hole (1-11) inside the bearing body (1); The two water cooling cavities (1-3) are symmetrically distributed about the center; One of the water cooling cavities (1-3) is located directly in front of the other water cooling cavity (1-3); The two water cooling cavities (1-3) are connected to each other.

10. The novel turbocharger according to any one of claims 1 to 9, characterized in that, A compression end seal structure is also provided between the compressor impeller (8) and the bearing body (1); The compression end seal structure includes: a thrust bearing plate (4), an oil sealing cover (5), a shaft seal sleeve (6), an oil baffle (12) and a thrust spacer sleeve (7); The shaft seal sleeve (6) is located on the left side of the thrust spacer sleeve (7); The shaft seal sleeve (6) and the thrust spacer sleeve (7) are installed radially outside the left end of the turbine rotating shaft (9); The shaft seal sleeve (6) is located between the compressor impeller (8) and the thrust spacer sleeve (7); The oil sealing cover (5) and the oil baffle (12) are installed around the outer circumference of the shaft seal sleeve (6); The oil baffle (12) is located on the right side of the oil sealing cover (5).

Images