An electrically assisted turbocharger

Abstract

The present invention discloses an electrically assisted turbocharger, which comprises a motor, a compressor and a turbine, wherein the compressor is located between the motor and the turbine and one end of the compressor is connected to the motor and the other end is connected to the turbine; and a heat dissipation assembly, which comprises a heat dissipation element, a heat dissipation rod and a heat dissipation fin, wherein the heat dissipation element is connected to the motor, the heat dissipation rod is installed in the compressor, and the heat dissipation fin is installed between the compressor and the turbine. The present invention has good heat dissipation effect in practical application; the overall weight is relatively light; when in operation, the starting effect is faster than that of most products on the market; the service life is extended; the structure is easy to disassemble and is conducive to maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of turbochargers, in particular to an electrically assisted turbocharger. Background Art

[0002] A turbocharger is actually an air compressor that increases the air intake by compressing air. It uses the inertial force of the exhaust gas discharged by the engine to drive the turbine in the turbine chamber. The turbine in turn drives the coaxial impeller. The impeller presses the air sent from the air filter pipe to increase the pressure and enter the cylinder. When the engine speed increases, the exhaust gas discharge speed and the turbine speed also increase synchronously. The impeller compresses more air into the cylinder. The increased air pressure and density can burn more fuel. By increasing the fuel amount and adjusting the engine speed accordingly, the engine's output power can be increased.

[0003] In the prior art, since the electrically assisted turbocharger is usually connected to the compressor and the turbine, and the heat in the exhaust gas is very high, the heat of the exhaust gas heats the coaxially connected compressor and the turbine, which in turn causes a large amount of heat to be transferred to the compressor along the rotating shaft with good thermal conductivity, which in turn causes the temperature of the electric drive mechanism installed on the compressor to be too high, affecting the normal operation of the electric drive mechanism, and the existing electrically assisted turbocharger has a poor heat dissipation performance of the motor;

[0004] In the prior art, there is a technical solution that uses motor offset to solve the motor heat dissipation problem, but the motor offset will affect the overall coaxiality of the turbocharger. Therefore, an electrically assisted turbocharger that solves the above problem is needed. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the problems existing in the prior art, the present invention is proposed.

[0007] Therefore, the technical problem to be solved by the present invention is that in the prior art, since the electrically assisted turbocharger is usually connected to the compressor and the turbine, and the heat in the exhaust gas is very high, which leads to the temperature of the electric drive mechanism installed on the compressor being too high, affecting the normal operation of the electric drive mechanism. In the prior art, there is a technical solution that uses motor offset to solve the motor heat dissipation problem, but the motor offset will cause the overall coaxiality of the turbocharger to be affected.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: an electrically assisted turbocharger, comprising a motor, a compressor and a turbine, wherein the compressor is located between the motor and the turbine and one end of the compressor is connected to the motor and the other end is connected to the turbine; and a heat dissipation assembly, comprising a heat sink, a heat sink rod and a heat sink, wherein the heat sink is connected to the motor, the heat sink rod is installed in the compressor, and the heat sink is installed between the compressor and the turbine.

[0009] As a preferred embodiment of the electrically assisted turbocharger of the present invention, it further comprises an overrunning clutch, wherein the overrunning clutch is located between the motor and the compressor, the motor comprises a stator, a rotor, a casing and a rotor shaft, the rotor shaft is fixedly mounted in the casing, the rotor is sleeved on the rotor shaft, and the stator is sleeved on the rotor; one end of the overrunning clutch is fixedly connected to the rotor shaft, and the other end is connected to the compressor.

[0010] As a preferred embodiment of the electrically assisted turbocharger described in the present invention, the casing comprises a first sleeve and a second sleeve, the first sleeve is sleeved on the second sleeve, a vent is arranged between the first sleeve and the second sleeve, the vent is connected to the interior of the casing and the interior of the compressor; a baffle is arranged in the second sleeve, the diameter of the baffle is the same as the inner diameter of the second sleeve, and one end of the rotor shaft is vertically connected to the baffle.

[0011] As a preferred embodiment of the electrically assisted turbocharger of the present invention, it further comprises a circular shaft, the compressor comprises a compressor casing and a compressor impeller, the circular shaft is coaxially arranged with the rotor shaft, the overrunning clutch is located between the circular shaft and the rotor shaft, and one end of the overrunning clutch is connected to the rotor shaft, and the other end is connected to the circular shaft; the compressor impeller is located in the compressor casing, and the compressor impeller and the compressor casing are sleeved together on the circular shaft.

[0012] As a preferred solution of the electrically assisted turbocharger of the present invention, the circular shaft passes through the compressor and is connected to the turbine.

[0013] As a preferred solution of the electrically assisted turbocharger of the present invention, the heat sink is fixedly mounted on the baffle, and the heat sink rod and the heat sink are mounted on the circular shaft.

[0014] As a preferred embodiment of the electrically-assisted turbocharger of the present invention, the heat sink is located in the compressor housing and between the overrunning clutch and the compressor impeller, the heat sink is vertically connected to the circular shaft and distributed circumferentially on the circular shaft; the heat sink is nested on the circular shaft in a circular ring shape, and the heat sink is located between the compressor and the turbine.

[0015] As a preferred solution of the electrically assisted turbocharger of the present invention, the heat sink is composed of a plurality of concentrically arranged heat sink rings, and there are a plurality of heat sink fins, which are all sequentially nested on the circular shaft.

[0016] As a preferred solution of the electrically assisted turbocharger of the present invention, a spoiler is nested on the overrunning clutch.

[0017] As a preferred solution of the electrically assisted turbocharger of the present invention, the inner diameter of the spoiler is the same as the outer diameter of the overrunning clutch, and the spoiler is sleeved on the overrunning clutch.

[0018] Beneficial effects of the present invention: The beneficial effects of the present invention are as follows:

[0019]

[0020] Note: (1) A / R value: The smaller the A / R value, the higher the exhaust gas flow rate, the faster the turbocharger response in the low speed range, the lower the turbo lag, and the higher the turbocharger can achieve in the lower speed range.

[0021] (2) Boost value: Within a reasonable range, a larger boost value can generate greater power.

[0022] (3) Turbo lag: It refers to the time required for the valve to reach maximum opening and the boost pressure to reach maximum value. A smaller value means better responsiveness.

[0023] (4) Impeller clearance: The distance from the tip of the compressor impeller blade to the compressor casing. A smaller value can greatly improve the air filling efficiency.

[0024] (5) Turbocharger surface temperature: low temperature means high efficiency, long life and high reliability.

[0025] 1. Under the same working conditions, the surface temperature of the existing turbocharger is 387°C, and the surface temperature of the turbocharger is 282°C. Compared with the existing turbocharger, the surface temperature of the turbine is about 27% lower, and the cooling effect is significant.

[0026] 2. The weight of existing turbochargers is generally 7-20kg, and the weight of this turbocharger can be reduced by about 0.3kg.

[0027] 3. Due to the reduced weight, the turbine can start working earlier, the startup time is faster, and the operating efficiency is higher.

[0028] 4. Existing turbochargers The service life of existing turbochargers is generally 250,000 kilometers, and the main factor affecting its service life is temperature. From the first point, it can be seen that the turbocharger has an obvious cooling effect, so the service life can be further increased to about 300,000 kilometers.

[0029] 5. The motor of the existing electric-assisted turbocharger is generally placed between the turbine and the compressor, which makes disassembly, maintenance and repair difficult, and the motor is close to the high-temperature exhaust turbine, so the temperature is high. The motor of this turbocharger is located on the side of the turbine and the compressor, which is convenient for disassembly, maintenance and repair, and the temperature is low, which makes management and maintenance faster and more effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0031] Figure 1 FIG. 1 is an overall diagram of the supercharger in the first embodiment.

[0032] Figure 2 This is the motor installation diagram in the first embodiment.

[0033] Figure 3 Schematic diagram of the internal structure of the motor in the first embodiment.

[0034] Figure 4 It is the compressor structure diagram in the first embodiment.

[0035] Figure 5 It is an exploded view of the overall structure in the first and second embodiments.

[0036] Figure 6 This is an installation diagram of the heat dissipation ring and the heat dissipation rod in the second embodiment in the overall structure.

[0037] Figure 7 This is a diagram showing the installation of the heat sink rod and the heat sink in the overall structure in the second embodiment.

[0038] Figure 8 The overall structure cross-sectional view of the first and second embodiments

[0039] Fig. 9 The beneficial effect diagram of the present invention in the second embodiment is shown in FIG. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0043] Example 1

[0044] Reference Figures 1 to 5 8 is a first embodiment of the present invention, which provides an electrically assisted turbocharger, which includes a motor 101 , a compressor 102 and a turbine 103 .

[0045] The compressor 102 is located between the motor 101 and the turbine 103 , and one end of the compressor 102 is connected to the motor 101 , and the other end is connected to the turbine 103 .

[0046] The motor 101 includes a stator 101a, a rotor 101b, a casing 101c and a rotor shaft 101d. Specifically, the casing 101c includes a first sleeve 101c-1 and a second sleeve 101c-2, both of which are cylindrical. The first sleeve 101c-1 is sleeved on the second sleeve 101c-2 and fixedly connected. An annular protrusion A is provided on the inner wall of the first sleeve 101c-1, and the protrusion A is fixedly connected to the outer wall of the second sleeve 101c-2. There are at least two protrusions A, and three are provided in this embodiment. A certain distance is left between adjacent protrusions A. At the same time, a vent 101c-3 is provided between adjacent protrusions A, and the vent 101c-3 is connected to the inside of the casing 101c and the inside of the compressor 102.

[0047] Furthermore, the interior of the second sleeve 101c-2 is hollow, and both ends are connected through it. A circular baffle 101c-4 is arranged in the second sleeve 101c-2. The diameter of the baffle 101c-4 is the same as the inner diameter of the second sleeve 101c-2. The baffle 101c-4 is embedded in the port of the second sleeve 101c-2. The rotor shaft 101d is located in the second sleeve 101c-2 and one end is vertically connected to the baffle 101c-4. The rotor 101b is sleeved on the rotor shaft 101d, and the stator 101a is sleeved on the rotor 101b.

[0048] The compressor 102 includes a compressor casing 102a and a compressor impeller 102b, and specifically, also includes a circular shaft 105 and an overrunning clutch 104. The circular shaft 105 is coaxially arranged with the rotor shaft 101d, and the overrunning clutch 104 is located between the circular shaft 105 and the rotor shaft 101d to connect the two. One end of the rotor shaft 101d is connected to the baffle 101c-4, and the other end is connected to the overrunning clutch 104. The other end of the overrunning clutch 104 is connected to the circular shaft 105. The compressor impeller 102b is located in the compressor casing 102a, and both are concentrically sleeved on the circular shaft 105. One end of the compressor casing 102a is fixedly connected to the first sleeve 101c-1 in the casing 101c. The circular shaft 105 passes through the compressor 102 and is connected to the turbine 103.

[0049] Example 2

[0050] Reference Figures 5 to 9 , which is a second embodiment of the present invention. This embodiment is based on the previous embodiment and further includes a heat dissipation component 200.

[0051] Since the electrically assisted turbocharger is usually connected to a compressor and a turbine, the heat in the exhaust gas is very high. The heat of the exhaust gas heats the coaxially connected compressor and turbine, which in turn causes a large amount of heat to be transferred to the compressor along the rotating shaft with good thermal conductivity, thereby causing the temperature of the electric drive mechanism installed on the compressor to be too high, affecting the normal operation of the electric drive mechanism. Therefore, it is necessary to install a heat dissipation assembly 200, which includes a heat sink 201, a heat sink rod 202 and a heat sink 203.

[0052] Furthermore, the heat sink 201 is installed on the side of the baffle 101c-4 opposite to the rotor shaft, and the heat sink 201 is composed of a plurality of concentrically arranged heat sink rings 201a, thereby increasing the heat dissipation effect of the housing 101c.

[0053] Furthermore, a heat sink 202 is arranged inside the compressor casing 102a and between the overrunning clutch 104 and the compressor impeller 102b. The heat sink 202 is a cylindrical structure, vertically connected to the circular shaft 105, and evenly distributed circumferentially on the circular shaft 105. A spoiler 106 is arranged on the overrunning clutch 104. Specifically, the inner diameter of the spoiler 106 is the same as the outer diameter of the overrunning clutch 104, and the spoiler 106 is sleeved on the overrunning clutch 104.

[0054] When the rotor shaft 101d is driven by the turbine and the speed is too high, the rotor shaft 101d will not passively drive the rotor 101b to rotate under the action of the overrunning clutch 104, thereby reducing the resistance from the rotor 101b; when the vent 101c-3 takes in air, a turbulent flow is formed in the intake passage through the spoiler 106, so that a larger area can be contacted, thereby sweeping away the heat generated by the open-mounted stator 101a and rotor 101b and then discharging it from the casing 101c more effectively through the heat sink 202.

[0055] Furthermore, the heat sink 203 is arranged on the circular shaft 105 between the compressor 102 and the turbine 103, and the heat sink 203 is nested on the circular shaft 105 in a circular ring shape. There are also multiple heat sinks 203, which are nested on the circular shaft 105 in sequence; through the annular heat sink 203, the heat from the exhaust gas of the turbine 103 acting on the circular shaft 105 can be dissipated under the action of its annular structure.

[0056] Under the action of the heat dissipation component 200, the A / R value of the present invention is 3.6, which is 20% lower than 4.5 on the market, that is, the exhaust gas emission flow rate is higher, and the boost value is also relatively higher than 37.5% of the market product. Since the weight of the present invention is lighter, and the exhaust gas and heat emissions are better, after experiments, the turbo hysteresis of the present invention is 0.8s, which is 46.7% faster than 1.5s of the market product, and the impeller clearance is only 0.05mm. During use, after accurate testing, the surface temperature of the turbocharger is only 282°C. The low temperature makes the operation efficiency high, the service life long, and the reliability high. The specific comparison effect diagram is as follows Fig. 9 shown.

[0057] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0058] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0059] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An electrically assisted turbocharger, characterized in that: include, A motor (101), a compressor (102) and a turbine (103), wherein the compressor (102) is located between the motor (101) and the turbine (103), and one end of the compressor (102) is connected to the motor (101), and the other end is connected to the turbine (103); The motor (101) comprises a stator (101a), a rotor (101b), a casing (101c) and a rotor shaft (101d); the rotor shaft (101d) is fixedly mounted in the casing (101c); the rotor (101b) is sleeved on the rotor shaft (101d); and the stator (101a) is sleeved on the rotor (101b); An overrunning clutch (104), the overrunning clutch (104) being located between the motor (101) and the compressor (102), one end of the overrunning clutch (104) being fixedly connected to the rotor shaft (101d), and the other end of the overrunning clutch (104) being connected to the compressor (102); A circular shaft (105), the circular shaft (105) being coaxially arranged with the rotor shaft (101d), the overrunning clutch (104) being located between the circular shaft (105) and the rotor shaft (101d), and one end of the overrunning clutch (104) being connected to the rotor shaft (101d) and the other end being connected to the circular shaft (105); The compressor (102) comprises a compressor casing (102a) and a compressor impeller (102b), wherein the compressor impeller (102b) is located in the compressor casing (102a), and the compressor impeller (102b) and the compressor casing (102a) are sleeved together on the circular shaft (105); A heat dissipation assembly (200), comprising a heat dissipation element (201), a heat dissipation rod (202), and a heat dissipation fin (203), wherein the heat dissipation element (201) is connected to the motor (101), the heat dissipation rod (202) is installed in the compressor (102), and the heat dissipation fin (203) is installed between the compressor (102) and the turbine (103); The heat dissipation rod (202) is located in the compressor casing (102a) and between the overrunning clutch (104) and the compressor impeller (102b); the heat dissipation rod (202) is vertically connected to the circular shaft (105) and is distributed circumferentially on the circular shaft (105); The heat sink (203) is in a circular ring shape and is nested on the circular shaft (105), and the heat sink (203) is located between the compressor (102) and the turbine (103); The heat sink (201) is composed of a plurality of concentrically arranged heat sink rings (201a), and there are a plurality of heat sink fins (203), all of which are sequentially nested on the circular shaft (105); A spoiler (106) is nested on the overrunning clutch (104); the inner diameter of the spoiler (106) is the same as the outer diameter of the overrunning clutch (104); and the spoiler (106) is sleeved on the overrunning clutch (104).

2. The electrically assisted turbocharger according to claim 1, characterized in that: The casing (101c) comprises a first sleeve (101c-1) and a second sleeve (101c-2), the first sleeve (101c-1) being sleeved on the second sleeve (101c-2), a vent (101c-3) being arranged between the first sleeve (101c-1) and the second sleeve (101c-2), the vent (101c-3) being in communication with the interior of the casing (101c) and the interior of the compressor (102); A baffle (101c-4) is arranged inside the second sleeve (101c-2), the diameter of the baffle (101c-4) is the same as the inner diameter of the second sleeve (101c-2), and one end of the rotor shaft (101d) is vertically connected to the baffle (101c-4); The heat sink (201) is fixedly mounted on the baffle (101c-4).

3. The electrically assisted turbocharger according to claim 1, characterized in that The circular shaft (105) passes through the compressor (102) and is connected to the turbine (103).

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