Supercharger mounting disc for reducing VGT blade clearance

Abstract

The utility model relates to the technical field of supercharger mounting disc design, and discloses a supercharger mounting disc capable of reducing a VGT blade gap, which comprises a mounting disc and a rear cover gap reducing fixing assembly. According to the supercharger mounting disc capable of reducing the VGT blade clearance, the mounting disc and the rear cover are coated with a layer of material, and then the VGT blades are required to be in interference fit with the mounting disc and the rear cover in design. When the VGT starts to operate, the blades can scrape a coating material due to the fact that the blades interfere with the mounting disc and the rear cover, the coating material is soft, the blades can scrape a layer of material, the blades cannot be damaged, and the VGT continues to operate. According to the technology, the clearances between the VGT blades and the mounting disc and between the VGT blades and the rear cover can be reduced to be zero, the vortex end efficiency is improved, and through matched use of the positioning holes and the inserting rods, the mounting process is simplified, the assembling precision is improved, and the stability and the sealing performance of the structure are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of supercharger mounting plate design, in particular to a supercharger mounting plate for reducing a VGT blade clearance. Background Art

[0002] In the design of a variable geometry turbocharger (VGT), the gap between the VGT blades, mounting plate and rear cover is an important consideration. Due to machining tolerances, thermal expansion and contraction characteristics of materials, and uncertainties in the assembly process, a certain gap is usually reserved between these components. This design is mainly to prevent friction or collision between the VGT blades and the mounting plate or rear cover due to thermal expansion or mechanical stress during the operation of the turbocharger, thereby causing deformation or damage to the blades, thereby affecting the performance and life of the entire turbocharger.

[0003] However, the existence of this gap also brings a series of problems. First, the gap will reduce the efficiency of the turbine end because some gas may leak through the gap instead of being effectively compressed and sent to the engine. Secondly, the gap will affect the performance of the engine, especially under low-speed conditions, because the gas flow and pressure are low at this time, and the impact of the gap on efficiency is more significant. In addition, the gap may also lead to the aggravation of problems such as noise and vibration, further affecting the driving experience and ride comfort of the vehicle. Therefore, a supercharger mounting plate that reduces the VGT blade clearance is proposed to solve the above-mentioned problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a supercharger mounting plate for reducing the VGT blade clearance, which has the advantages of significantly reducing the clearance and optimizing the sealing performance, and solves the problem of reduced turbine end efficiency.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A supercharger mounting plate for reducing the gap between VGT blades, comprising a mounting plate and a rear cover gap reducing fixing assembly, wherein the middle part of the mounting plate is connected to an impeller plate, the impeller plate is provided with VGT blades on the outside, the mounting plate is fixed with bolts to the rear cover, and the gap reducing fixing assembly is provided on the side where the mounting plate and the rear cover are close to each other;

[0009] The gap reduction fixing component includes two layers of material and a sealing ring. The two layers of material are respectively arranged on the side where the mounting plate and the rear cover are close to each other and are located on the upper and lower sides of the VGT blade. The sealing ring is located between the mounting plate and the rear cover and is located on the outside of the VGT blade.

[0010] As a preferred technical solution of the utility model, an annular groove is provided inside the mounting plate and the rear cover, and a first bearing and a second bearing are respectively provided in the annular groove, and the top and bottom of the impeller plate are rotatably connected to the first bearing and the second bearing respectively.

[0011] As a preferred technical solution of the utility model, two layers of the material are respectively coated on the side of the mounting plate and the rear cover close to each other and are interference fit with the VGT blades, and the rotation direction of the VGT blades is clockwise.

[0012] As a preferred technical solution of the utility model, the mounting plate and the rear cover are close to each other on one side and are located outside the VGT blades, respectively, and a positioning hole and an insertion rod are provided. The insertion rod is inserted into the sealing ring and then inserted into the positioning hole.

[0013] As a preferred technical solution of the utility model, the mounting plate and the back cover are close to each other on one side and an insert block and a positioning groove are respectively provided on the outside of the positioning hole and the insertion rod. The positioning groove is in the shape of a circular runway and is inclined counterclockwise, and the insert block and the positioning groove are plugged in.

[0014] As a preferred technical solution of the utility model, the outside of the mounting plate and the rear cover are both provided with four circumferentially distributed fixing feet, and the middle of the fixing feet is threadedly connected with bolts.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a supercharger mounting plate for reducing the VGT blade clearance, which has the following beneficial effects:

[0017] The supercharger mounting plate that reduces the gap between the VGT blades is designed by coating a layer of material on the mounting plate and the rear cover, and then requiring an interference fit between the VGT blades and the mounting plate and the rear cover. When the VGT starts to run, the blades will interfere with the mounting plate and the rear cover, and the blades will scrape the coating material. Since this material is soft, the blades will scrape off a layer of material without being damaged and continue to run. At this time, the gap between the blades and the mounting plate and the rear cover is 0. This technology can reduce the gap between the VGT blades and the mounting plate and the rear cover to 0, improve the turbine end efficiency, and through the use of positioning holes and plug rods, it not only simplifies the installation process and improves the assembly accuracy, but also enhances the stability and sealing of the structure. In addition, the unique design of the positioning groove and the plug block further enhances the connection strength between the mounting plate and the rear cover, preventing loosening or falling off due to vibration or impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model at A;

[0020] Figure 3 It is a schematic diagram of the top structure of the rear cover of the utility model.

[0021] In the figure: 1. mounting plate; 101. positioning hole; 2. rear cover; 201. plug rod; 202. positioning groove; 3. impeller plate; 4. VGT blade; 5. first bearing; 6. second bearing; 7. material; 8. sealing ring; 9. fixing foot; 10. bolt. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] 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 direct connection, or an indirect connection 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 according to specific circumstances.

[0025] See also Figure 1-3 , a supercharger mounting plate for reducing the gap between VGT blades, comprising a mounting plate 1, a rear cover 2, a gap reducing fixing assembly, an impeller plate 3 connected to a central shaft of the mounting plate 1, a VGT blade 4 arranged outside the impeller plate 3, the mounting plate 1 and the rear cover 2 are fixed with bolts, and a gap reducing fixing assembly is arranged on one side of the mounting plate 1 and the rear cover 2 close to each other;

[0026] The gap reducing fixing component includes two layers of material 7 and a sealing ring 8. The two layers of material 7 are respectively arranged on the side where the mounting plate 1 and the rear cover 2 are close to each other and are located on the upper and lower sides of the VGT blade 4. The sealing ring 8 is located between the mounting plate 1 and the rear cover 2 and is located on the outer side of the VGT blade 4.

[0027] It should be noted that the material 7 can be made of thermoplastic elastomer TPE, which combines the elasticity of rubber and the processability of plastic. They can maintain stable performance in a wide temperature range and are suitable for the high temperature environment when the turbocharger is working. TPE materials also have good sealing properties, which helps to reduce gas leakage; they can also be high-temperature wear-resistant coatings, which usually have excellent wear resistance and heat resistance and can maintain long-term stability under high temperature and high load conditions. They can be coated on the inner surface of the mounting plate and the rear cover to reduce friction and clearance between the VGT blades.

[0028] In this embodiment, annular grooves are provided inside the mounting plate 1 and the rear cover 2, and the first bearing 5 and the second bearing 6 are provided in the annular grooves respectively. The top and the bottom of the impeller plate 3 are rotatably connected to the first bearing 5 and the second bearing 6 respectively.

[0029] In this embodiment, two layers of material 7 are respectively coated on the side of the mounting plate 1 and the rear cover 2 close to each other and are interference fit with the VGT blade 4. The rotation direction of the VGT blade 4 is clockwise.

[0030] In this embodiment, a positioning hole 101 and an insertion rod 201 are respectively provided on one side of the mounting plate 1 and the rear cover 2 close to each other and located outside the VGT blade 4 . The insertion rod 201 is inserted into the positioning hole 101 after being inserted into the sealing ring 8 .

[0031] It should be noted that the installation process is simplified and the assembly accuracy is improved by using the positioning hole 101 and the insertion rod 201 in the design. This design allows the installation plate 1 and the rear cover 2 to be quickly and accurately positioned and fixed together, thereby improving the stability and reliability of the entire supercharger. At the same time, the insertion of the insertion rod 201 and the positioning hole 101 can also enhance the sealing performance of the structure and prevent gas leakage and performance loss.

[0032] In this embodiment, the installation plate 1 and the back cover 2 are close to each other on one side and an insert block and a positioning groove 202 are respectively provided on the outside of the positioning hole 101 and the insertion rod 201. The positioning groove 202 is in the shape of a circular track and tilted counterclockwise, and the insert block and the positioning groove 202 are plugged in.

[0033] It should be noted that the positioning groove 202 and the plug block may also be other shapes that are convenient for plugging in. The counterclockwise inclination is opposite to the rotation direction of the VGT blade 4, thereby reducing the possibility of the VGT blade 4 being loosened when rotating.

[0034] In this embodiment, four circumferentially distributed fixing feet 9 are disposed on the outside of the mounting plate 1 and the rear cover 2 , and bolts 10 are threadedly connected to the middle of the fixing feet 9 .

[0035] Beneficial effects:

[0036] The supercharger mounting plate for reducing the VGT blade clearance is achieved by coating a layer of material 7 on the mounting plate 1 and the rear cover 2, and then requiring an interference fit between the VGT blade 4 and the mounting plate 1 and the rear cover 2 in terms of design. When the VGT starts to run, the blade will interfere with the mounting plate 1 and the rear cover 2, and the blade will scrape the coating material. Since this material is relatively soft, the blade will scrape off a layer of material without being damaged and will continue to run. At this time, the clearance between the blade and the mounting plate 1 and the rear cover 2 is 0. This technology can reduce the clearance between the VGT blade 4 and the mounting plate 1 and the rear cover 2 to 0, thereby improving the turbine end efficiency. In addition, the coordinated use of the positioning hole 101 and the insertion rod 201 not only simplifies the installation process and improves the assembly accuracy, but also enhances the stability and sealing of the structure. In addition, the unique design of the positioning groove 202 and the insertion block further enhances the connection strength between the mounting plate 1 and the rear cover 2, thereby preventing loosening or falling off due to vibration or impact.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A supercharger mounting plate for reducing the gap between VGT blades, comprising a mounting plate (1), a rear cover (2) and a gap reducing fixing assembly, wherein the mounting plate (1) is connected to an impeller plate (3) via a central shaft, and the impeller plate (3) is provided with VGT blades (4) outside, the mounting plate (1) and the rear cover (2) are fixed by bolts, and the gap reducing fixing assembly is provided on the side where the mounting plate (1) and the rear cover (2) are close to each other; Features: The gap reducing fixing component comprises two layers of material (7) and a sealing ring (8), wherein the two layers of material (7) are respectively arranged on one side where the mounting plate (1) and the rear cover (2) are close to each other and are located on the upper and lower sides of the VGT blade (4), and the sealing ring (8) is located between the mounting plate (1) and the rear cover (2) and is located on the outer side of the VGT blade (4).

2. A supercharger mounting plate for reducing VGT blade clearance according to claim 1, characterized in that: The mounting plate (1) and the rear cover (2) are both provided with an annular groove, and a first bearing (5) and a second bearing (6) are respectively provided in the annular groove, and the top and bottom of the impeller plate (3) are rotatably connected to the first bearing (5) and the second bearing (6) respectively.

3. A supercharger mounting plate for reducing VGT blade clearance according to claim 1, characterized in that: The two layers of the material (7) are respectively coated on the side of the mounting plate (1) and the rear cover (2) close to each other and are interference fit with the VGT blade (4). The rotation direction of the VGT blade (4) is clockwise.

4. A supercharger mounting plate for reducing VGT blade clearance according to claim 1, characterized in that: The mounting plate (1) and the rear cover (2) are provided with a positioning hole (101) and an insertion rod (201) respectively on one side close to each other and located outside the VGT blade (4); the insertion rod (201) is inserted into the sealing ring (8) and then into the positioning hole (101).

5. A supercharger mounting plate for reducing VGT blade clearance according to claim 4, characterized in that: The installation plate (1) and the rear cover (2) are close to each other on one side, and an insert block and a positioning groove (202) are respectively provided on the outside of the positioning hole (101) and the insertion rod (201); the positioning groove (202) is in the shape of a circular track and is inclined counterclockwise; the insert block and the positioning groove (202) are plugged into each other.

6. A supercharger mounting plate for reducing VGT blade clearance according to claim 5, characterized in that: The outside of the installation plate (1) and the rear cover (2) are both provided with four circumferentially distributed fixing feet (9), and the middle of the fixing feet (9) is threadedly connected with a bolt (10).

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