Turbine shaft and mounting structure thereof

Abstract

The utility model discloses a turbine shaft and installation structure thereof, the turbine shaft comprises a shaft end, a step part, a first cylindrical section, a second cylindrical section, a third cylindrical section and a fourth cylindrical section which are arranged in sequence, the shaft end is provided with a turbine, the step part comprises a first groove body, a second groove body and a guide surface, the first groove body is arranged at the first end of the first cylindrical section, and the second groove body is arranged at the second end of the second cylindrical section. The second groove bodies are arranged on one side of the first groove body at intervals, the guide face is obliquely arranged at the second end of the first cylindrical section, the first end of the second cylindrical section is connected with the guide face, the first groove body is configured to be provided with a sealing ring, and the first end of the third cylindrical section is connected with the second end of the second cylindrical section. The first end of the fourth cylindrical section is connected with the second end of the third cylindrical section, and the impeller is installed on the third cylindrical section and the fourth cylindrical section. According to the turbine shaft, the shaft end, the step part, the first cylindrical section, the second cylindrical section, the third cylindrical section and the fourth cylindrical section are arranged and matched, so that the mounting stability of the turbine shaft is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of turbochargers, in particular to a turbine shaft and a mounting structure thereof. Background Art

[0002] Gasoline engines generate power through combustion of a combustible mixture of gasoline and air within the cylinder. The power and torque of an electronic fuel injection gasoline engine depend on the amount of air entering the cylinder. When the engine is already operating at its optimal performance, the only way to increase its output power is to compress more air into the cylinder to increase the amount of combustible mixture, thereby improving combustion and output power. A turbocharger is a control device that uses pressure to drive the pump impeller in the housing to rotate, thereby driving the turbine impeller in the intake plenum chamber to pressurize air into the cylinder, thereby increasing engine output power.

[0003] Among them, the turbine shaft is an important component of the turbocharger. It is a precision part that bears the rotation of 120,000 to 160,000 rpm and ultra-high temperature during operation. The turbine shaft needs to be equipped with a turbine, compressor impeller and supporting accessories. The existing turbine shaft has poor stability after installing the turbine, compressor impeller and supporting accessories, and is prone to loosening, which affects the service life of the turbine shaft. Utility Model Content

[0004] In order to solve the related technical problems, the utility model provides a turbine shaft and a mounting structure thereof, so as to solve the problem of poor stability after the turbine shaft is installed with a turbine, a compressor impeller and supporting accessories.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A turbine shaft comprises a shaft end, a stepped portion, a first cylindrical section, a second cylindrical section, a third cylindrical section, and a fourth cylindrical section, which are coaxially arranged in sequence, wherein:

[0007] The shaft end is provided with a turbine;

[0008] The stepped portion includes a first groove body, a second groove body, and a guide surface. The first groove body is opened at the first end of the first cylindrical section. The second groove body is spaced apart and arranged on one side of the first groove body. The guide surface is inclined and arranged at the second end of the first cylindrical section. The first cylindrical section is installed at the tail end of the intermediate body. The first groove body is configured to install a sealing ring.

[0009] The first end of the second cylindrical segment is connected to the guide surface, the diameter of the second cylindrical segment is smaller than the diameter of the first cylindrical segment, and the second cylindrical segment is configured to install a support accessory

[0010] The first end of the third cylindrical segment is connected to the second end of the second cylindrical segment, the diameter of the third cylindrical segment is smaller than the diameter of the second cylindrical segment, and a portion of the third cylindrical segment is configured to install a shaft seal.

[0011] The first end of the fourth cylindrical segment is connected to the second end of the third cylindrical segment. The diameter of the fourth cylindrical segment is smaller than the diameter of the third cylindrical segment. The impeller is mounted on the third cylindrical segment and the fourth cylindrical segment.

[0012] Optionally, the second end of the third cylindrical segment is provided with a chamfer.

[0013] Optionally, the second end of the fourth cylindrical segment is provided with a chamfer.

[0014] Optionally, the second end of the fourth cylindrical segment is further provided with a threaded segment, the threaded segment is configured to install a fastener, and the fastener is configured to fix the impeller.

[0015] A turbine shaft mounting structure comprises the above-mentioned turbine shaft.

[0016] Optionally, the turbine mounting structure further includes a compression casing, an intermediate body and a turbine casing, the shaft end is arranged in the turbine casing, the first cylindrical section, the stepped portion and the second cylindrical section are arranged in the intermediate body, and the third cylindrical section and the fourth cylindrical section are arranged in the compression casing.

[0017] Optionally, the threaded section is arranged in the compression shell.

[0018] The beneficial effects of the present invention are as follows: compared with the prior art, the turbine shaft provided by the present invention has the following beneficial effects:

[0019] 1. The installation stability of the turbine shaft is improved through the arrangement and coordination of the shaft end, the stepped portion, the first cylindrical section, the second cylindrical section, the third cylindrical section, and the fourth cylindrical section;

[0020] 2. The setting of the guide surface facilitates the installation of the turbine shaft and reduces installation wear;

[0021] 3. The chamfer setting facilitates the installation of the turbine shaft and improves the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, a brief introduction is given below to the background technology of the present invention and the drawings required for use in the description of 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 the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of a turbine shaft provided by an embodiment of the present utility model;

[0024] Figure 2 This is a schematic structural diagram of a stepped portion of a turbine shaft provided by an embodiment of the present utility model;

[0025] Figure 3 This is a schematic structural diagram of a turbine shaft mounting structure provided by an embodiment of the present utility model;

[0026] Figure 4 It is a cross-sectional schematic diagram of a turbine shaft mounting structure provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings.

[0028] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of the present invention. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly attached to the other component or there can be a central component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items.

[0029] Example

[0030] See also Figures 1 to 4 As shown, this embodiment provides a turbine shaft, which includes a shaft end 1, a stepped portion 2, a first cylindrical section 3, a second cylindrical section 4, a third cylindrical section 5 and a fourth cylindrical section 6, which are coaxially arranged in sequence, wherein:

[0031] The shaft end 1 is provided with a turbine 10.

[0032] The stepped portion 2 includes a first trough 20, a second trough 21 and a guide surface 22. The first trough 20 is provided at the first end of the first cylindrical section 3 opened by the first trough 20. The second trough 21 is spaced apart and arranged on one side of the first trough 20. The guide surface 22 is obliquely arranged at the second end of the first cylindrical section 3. The first cylindrical section 3 is mounted at the tail end of the intermediate body. The first trough 20 is configured to install a sealing ring.

[0033] The first end of the second cylindrical section 4 is connected to the guide surface 22. The diameter of the second cylindrical section 4 is smaller than the diameter of the first cylindrical section 3. The second cylindrical section 4 is configured to install a support accessory.

[0034] The first end of the third cylindrical segment 5 is connected to the second end of the second cylindrical segment 4. The diameter of the third cylindrical segment 5 is smaller than the diameter of the second cylindrical segment 4. A portion of the third cylindrical segment 5 is configured to install a shaft seal.

[0035] The first end of the fourth cylindrical segment 6 is connected to the second end of the third cylindrical segment 5 . The diameter of the fourth cylindrical segment 6 is smaller than the diameter of the third cylindrical segment 5 . The impeller is mounted on the third cylindrical segment 5 and the fourth cylindrical segment 6 .

[0036] Specifically, the second end of the third cylindrical segment 5 is provided with a chamfer.

[0037] Specifically, the second end of the fourth cylindrical segment 6 is provided with a chamfer.

[0038] Specifically, a threaded section 7 is further provided at the second end of the fourth cylindrical section 6 . The threaded section 7 is configured to install a fastener, and the fastener is configured to fix the impeller.

[0039] It can be seen that the installation stability of the turbine shaft is improved by the coordinated arrangement of the shaft end 1, the stepped portion 2, the first cylindrical segment 3, the second cylindrical segment 4, the third cylindrical segment 5, the fourth cylindrical segment 6 and the threaded segment 7.

[0040] A turbine shaft mounting structure comprises the above-mentioned turbine shaft.

[0041] As an embodiment, the turbine 10 mounting structure also includes a compressor shell 100, an intermediate body 101 and a turbine shell 102, the shaft end 1 is arranged in the turbine shell 102, the first cylindrical section 3, the stepped portion 2 and the second cylindrical section 4 are arranged in the intermediate body 101, and the third cylindrical section 5 and the fourth cylindrical section 6 are arranged in the compressor shell 100.

[0042] Specifically, the threaded section 7 is disposed in the compression shell 100 .

[0043] Specifically, a floating bearing 40 is provided between the second cylindrical section 4 and the intermediate body 101, a floating bearing baffle 41 is provided at the first end of the second cylindrical section 4, and an adjustment plate 42, a wire retaining ring 43 and a fixed sleeve 44 are sequentially provided at the second end of the second cylindrical section 4.

[0044] It can be seen that the turbine shaft is segmented and arranged in the compressor housing 100, the intermediate body 101 and the turbine housing 102, which reduces the impact of uneven wear and increases the service life of the turbine shaft.

[0045] In the embodiments disclosed in this utility model, the terms "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments disclosed in this utility model based on specific circumstances.

[0046] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A turbine shaft, characterized in that: The turbine shaft comprises a shaft end, a stepped portion, a first cylindrical section, a second cylindrical section, a third cylindrical section and a fourth cylindrical section which are coaxially arranged in sequence, wherein: The shaft end is provided with a turbine; The stepped portion includes a first groove body, a second groove body, and a guide surface. The first groove body is opened at the first end of the first cylindrical section. The second groove body is spaced apart and arranged on one side of the first groove body. The guide surface is inclined and arranged at the second end of the first cylindrical section. The first cylindrical section is installed at the tail end of the intermediate body. The first groove body is configured to install a sealing ring. The first end of the second cylindrical segment is connected to the guide surface, the diameter of the second cylindrical segment is smaller than the diameter of the first cylindrical segment, and the second cylindrical segment is configured to install a support accessory. The first end of the third cylindrical segment is connected to the second end of the second cylindrical segment, the diameter of the third cylindrical segment is smaller than the diameter of the second cylindrical segment, and a portion of the third cylindrical segment is configured to install a shaft seal. The first end of the fourth cylindrical segment is connected to the second end of the third cylindrical segment, the diameter of the fourth cylindrical segment is smaller than the diameter of the third cylindrical segment, and the impeller is mounted on the third cylindrical segment and the fourth cylindrical segment.

2. A turbine shaft according to claim 1, characterized in that: The second end of the third cylindrical segment is provided with a chamfer.

3. The turbine shaft according to claim 1, characterized in that: The second end of the fourth cylindrical segment is provided with a chamfer.

4. The turbine shaft according to claim 1, characterized in that: The second end of the fourth cylindrical segment is further provided with a threaded segment, and the threaded segment is configured to install a fastener, and the fastener is configured to fix the impeller.

5. A turbine shaft mounting structure, characterized in that: The turbine shaft mounting structure includes a turbine shaft as described in any one of claims 1 to 4.

6. The turbine shaft mounting structure according to claim 5, characterized in that: The turbine mounting structure also includes a compression shell, an intermediate body and a turbine shell, the shaft end is arranged in the turbine shell, the first cylindrical section, the stepped portion and the second cylindrical section are arranged in the intermediate body, and the third cylindrical section and the fourth cylindrical section are arranged in the compression shell.

7. The turbine shaft mounting structure according to claim 6, characterized in that: The threaded section is arranged in the compression shell.

Images