CN112343857A - Turbocharger and method of assembling a turbocharger - Google Patents

Turbocharger and method of assembling a turbocharger Download PDF

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Publication number
CN112343857A
CN112343857A CN201910725298.5A CN201910725298A CN112343857A CN 112343857 A CN112343857 A CN 112343857A CN 201910725298 A CN201910725298 A CN 201910725298A CN 112343857 A CN112343857 A CN 112343857A
Authority
CN
China
Prior art keywords
shaft
turbocharger
impeller
stop surface
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910725298.5A
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Chinese (zh)
Inventor
S·门泽尔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vitesco Technologies Holding China Co Ltd
Original Assignee
Vitesco Technologies Holding China Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vitesco Technologies Holding China Co Ltd filed Critical Vitesco Technologies Holding China Co Ltd
Priority to CN201910725298.5A priority Critical patent/CN112343857A/en
Publication of CN112343857A publication Critical patent/CN112343857A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/053—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)

Abstract

A turbocharger includes a center body provided with a center hole, a shaft disposed in the center hole, a pressure impeller fixed to the shaft on one side of the center body, and a turbine fixed to the shaft on the other side of the center body. The shaft is provided with a stop surface facing the impeller. The turbocharger comprises a welding part for fixing the impeller to the shaft, at least one part is arranged between the impeller and the stop surface, and pressing force is arranged between the part and the impeller and/or between the part and the stop surface. The turbocharger of the invention is convenient to assemble.

Description

Turbocharger and method of assembling a turbocharger
Technical Field
The present invention relates to a turbocharger and a method of assembling a turbocharger, in particular.
Background
A turbocharger is an air compressor that increases the intake air amount by compressing air. The inertia impulse force of the exhaust gas discharged by the engine is used for pushing the turbine to rotate, and the turbine drives the pressure impeller to rotate. The impeller is used for pumping air to pressurize the air to enter the cylinder. When the rotating speed of the engine is increased, the exhaust gas discharge speed and the rotating speed of the turbine are also increased synchronously, the impeller compresses more air to enter the cylinder, the pressure and the density of the air are increased, more fuel can be combusted, the fuel quantity is correspondingly increased and the rotating speed of the engine is adjusted,
because of the high rotational speed of the turbocharger, it is particularly important for the turbocharger to be able to ensure shaft balancing with high precision. In the prior art, the pressure impeller, the shaft, the gland and the bearing ring are made to rotate synchronously by fixing the pressure impeller to the shaft using a nut. This increases the cost of the turbocharger because the impeller needs to be secured to the shaft by the use of a nut.
Disclosure of Invention
It is an object of the present invention to provide a turbocharger that is easy to assemble and a method of assembling a turbocharger.
According to one aspect of the present invention, a turbocharger is provided that includes a central body provided with a central bore, a shaft disposed within the central bore, a pressure impeller secured to the shaft on one side of the central body, and a turbine secured to the shaft on the other side of the central body. The shaft is provided with a stop surface facing the impeller. The turbocharger comprises a welding part for fixing the impeller to the shaft, at least one part is arranged between the impeller and the stop surface, and pressing force is arranged between the part and the impeller and/or between the part and the stop surface.
Preferably, the interior of the shaft between the weld and the stop face is provided with a contraction force in the axial direction.
Preferably, the components are a sealing sleeve and a bearing ring, and the pressure impeller, the sealing sleeve, the bearing ring and the stop surface are pressed together.
Preferably, the shaft is provided with a constriction in front of the impeller.
Preferably, the turbocharger further comprises a compression spring arranged between the pressure wheel and the stop surface, said compression spring generating a pressing force between the component and the stop surface and/or between the component and the pressure wheel.
Preferably, the components are a sealing sleeve and a bearing ring, and the compression spring is arranged between the pressure impeller and the sealing sleeve or between the sealing sleeve and the bearing ring or between the bearing ring and the stop surface.
According to one aspect of the present invention, a method of assembling a turbocharger comprising a central body having a central bore, a shaft disposed within the central bore, a pressure impeller secured to the shaft on one side of the central body, and a turbine secured to the shaft on the other side of the central body is provided. The shaft is provided with a stop surface facing the impeller, the shaft includes a first end portion located at one side of the impeller, at least one member is provided between the impeller and the stop surface, and the member includes:
step 1, applying force to the first end part by using a stretching tool, and stretching the shaft outwards along the axial direction to a certain degree;
step 2, fixing the pressure impeller on the shaft in a welding mode;
and 3, separating the stretching tool from the first end part.
Preferably, the shaft is provided with a constriction between the impeller and the first end, at which constriction the shaft is broken or severed.
According to an aspect of the present invention, there is also provided a method of assembling a turbocharger comprising a central body provided with a central bore, a shaft disposed within the central bore, a pressure impeller fixed to the shaft on one side of the central body and a turbine fixed to the shaft on the other side of the central body, the shaft being provided with a stop face facing the pressure impeller, a gland and a bearing ring being provided between the pressure impeller and the stop face, the turbocharger further comprising a compression spring provided between the pressure impeller and the gland or between the gland and the bearing ring or between the bearing ring and the stop face, comprising:
step 1, pressing a pressure impeller towards a turbine direction by using a compression tool, wherein the compression spring is compressed to generate pressing force between a bearing ring and a stop surface and/or between a sealing sleeve and the pressure impeller and/or between the sealing sleeve and the bearing ring;
step 2, fixing the pressure impeller on the shaft in a welding mode;
and 3, loosening the compression tool and taking out the turbocharger.
Preferably, the impeller is provided with an accommodating hole, and the compression spring is arranged in the accommodating hole.
The turbocharger provided by the invention has the advantages that the pressure impeller is fixed on the shaft in a welding mode, so that the number of parts of the turbocharger is reduced, and the cost is reduced.
Drawings
Fig. 1 is a sectional view of a turbocharger in a first embodiment of the present invention.
Fig. 2 is a sectional view of a turbocharger in a second embodiment of the present invention.
Detailed Description
Referring to fig. 1 to 2, the present invention discloses a turbocharger 100 including a central body 31 provided with a central hole 311, a shaft 33 disposed in the central hole 311, a pressure impeller 35 fixed to the shaft 33 and located at one side of the central body 31, and a turbine 32 fixed to the shaft 33 and located at the other side of the central body 31. The shaft 33 is provided with a stop surface 332 facing the pressure wheel 35. The turbocharger 100 includes a weld 5 that secures the pressure wheel 35 to the shaft 33, at least one component disposed between the pressure wheel 35 and the stop surface 332, and a compressive force disposed between the component and the pressure wheel 35 and/or between the component and the stop surface 332. With this arrangement, the component and the shaft 33 can be made to rotate synchronously.
Fig. 1 shows a first embodiment of the invention, in which a shaft 33 is provided with a spacer 34, a radial bearing, a sealing sleeve 36, a bearing ring 37 and a thrust bearing 38. The shaft 33 includes a first end 333 on the side of the impeller 35. At least one member is disposed between the impeller 35 and the stop surface 332. In the present embodiment, the turbocharger 100 is assembled by the following method:
step 1, the first end 333 is forced outward in the axial direction using the stretching tool 2 to stretch the shaft 33 to some extent. The stretching degree is stretching according to actual needs. This stretching causes a contraction force in the axial direction to be generated in the interior of the shaft between the weld 5 and the stop surface 332.
Step 2, the impeller 35 is fixed to the shaft 33 by welding. Preferably, the welding can be performed by means of a laser generated by the laser device 1.
Step 3, the drawing tool 2 is separated from the first end 333. After the welding is completed, the drawing tool 2 can be removed from the shaft 33.
The shaft 33 is provided with a constriction 331 between the pressure impeller 35 and the first end 333, the shaft 33 being broken at the constriction 331. When the constricted portion 331 is provided, the constricted portion 331 may be provided on the shaft 33 as needed. Next, a constricted portion is machined into the shaft 33 by machining. After the welding of the pressing impeller 35 and the shaft 33 is completed, the shaft 33 is broken off from the constricted portion 331. The constricted portion 331 may be formed into a circular arc shape, a rectangular shape, an inverted triangular shape, or the like as needed.
The components are the sealing sleeve 36 and the bearing ring 37, and since the interior of the shaft between the weld 5 and the stop surface 332 has a contraction force in the axial direction, the pressure impeller 35, the sealing sleeve 36, the bearing ring 37 and the stop surface 332 can be pressed together, so that the pressure impeller 35, the sealing sleeve 36, the bearing ring 37 and the shaft 33 can rotate synchronously.
Fig. 2 shows a second embodiment of the present invention, and the turbocharger 100 includes a compression spring 4 provided between the pressure impeller 35 and the stop surface 332. The compression spring 4 causes a pressing force between the component and the stop surface 332 and/or between the component and the pressure wheel 35.
The components are a sealing sleeve 36 and a bearing ring 37, and the compression spring 4 is arranged between the pressure impeller 35 and the sealing sleeve 36 or between the sealing sleeve 36 and the bearing ring 37.
In the present embodiment, the turbocharger 100 may be assembled by:
in step 1, the pressing wheel 35 is pressed toward the turbine 32 by the compression tool 6, and the compression spring 4 is compressed to generate a pressing force between the component and the stop surface 332 or between the component and the pressing wheel 35. The compression tool 6 is a clamp tool that clamps the ends of the turbine 32 and the pressure impeller 35. Under the clamping of the compression tool 6, the compression spring 4 is compressed.
And 2, fixing the pressure impeller 35 on the shaft (33) by welding. Preferably, the welding can be performed by means of a laser generated by the laser device 1.
And 3, after welding is finished, loosening the compression tool 6 and taking out the turbocharger. Unlike the first embodiment, in the present embodiment, the shaft 33 does not need to be provided excessively long, and a tensile force in the axial direction is generated in the shaft between the welded portion 5 and the stopper surface 332.
The impeller 35 is provided with a receiving hole 351, and the compression spring 4 is placed in the receiving hole 351.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (10)

1. Turbocharger comprising an intermediate body (31) provided with a central bore (311), a shaft (33) arranged in the central bore (311), a pressure wheel (35) fixed to the shaft (33) on one side of the intermediate body (31) and a turbine wheel (32) fixed to the shaft (33) on the other side of the intermediate body (31), the shaft (33) being provided with a stop surface (332) facing the pressure wheel (35), characterized in that the turbocharger comprises a weld (5) fixing the pressure wheel (35) to the shaft (33), at least one part being provided between the pressure wheel (35) and the stop surface (332), a pressing force being provided between the part and the pressure wheel (35) and/or between the part and the stop surface (332).
2. A turbocharger according to claim 1, wherein the interior of the shaft between the weld (5) and the stop face (332) is provided with a contraction force in the axial direction.
3. A turbocharger according to claim 2, wherein the components are a sealing sleeve (36) and a bearing ring (37), the pressure impeller (35), sealing sleeve (36), bearing ring (37) and stop face (332) being pressed together.
4. A turbocharger according to claim 2, wherein the shaft (33) is provided with a constriction (331) located in front of the pressure wheel (35).
5. The turbocharger as claimed in claim 1, further comprising a compression spring (4) arranged between the pressure wheel (35) and the stop surface (332), the compression spring (4) generating a pressing force between the component and the stop surface (332) and/or between the component and the pressure wheel (35).
6. A turbocharger as claimed in claim 5, characterized in that the components are a sealing sleeve (36) and a bearing ring (37), the compression spring (4) being provided between the pressure impeller (35) and the sealing sleeve (36) or between the sealing sleeve (36) and the bearing ring (37) or between the bearing ring (37) and the stop surface (332).
7. A method of assembling a turbocharger comprising a central body (31) provided with a central bore (311), a shaft (33) disposed within the central bore (311), a pressure wheel (35) fixed to the shaft (33) on one side of the central body (31), and a turbine wheel (32) fixed to the shaft (33) on the other side of the central body (31), the shaft (33) being provided with a stop surface (332) facing the pressure wheel (35), the shaft (33) comprising a first end portion (333) on one side of the pressure wheel (35), at least one component being provided between the pressure wheel (35) and the stop surface (332), comprising:
step 1, applying force to a first end part (333) by using a stretching tool (2) to stretch a shaft (33) outwards along an axial direction to a certain degree;
step 2, fixing the pressure impeller (35) on the shaft (33) in a welding mode;
and 3, separating the stretching tool (2) from the first end part (333).
8. A method according to claim 7, wherein the shaft (33) is provided with a constriction (331) between the pressure impeller (35) and the first end portion (333), the shaft (33) being broken or severed at the constriction (331).
9. A method of assembling a turbocharger comprising a central body (31) provided with a central bore (311), a shaft (33) disposed within the central bore (311), a pressure impeller (35) fixed to the shaft (33) and located on one side of the central body (31), and a turbine (32) fixed to the shaft (33) and located on the other side of the central body (31), the shaft (33) being provided with a stop surface (332) facing the pressure impeller (35), a sealing sleeve (36) and a bearing ring (37) being provided between the pressure impeller (35) and the stop surface (332), the turbocharger further comprising a compression spring (4), the compression spring (4) being provided between the pressure impeller (35) and the sealing sleeve (36) or between the sealing sleeve (36) and the bearing ring (37) or between the bearing ring (37) and the stop surface (332), comprising:
step 1, a compression tool (6) is used for compressing a compression impeller (35) towards a turbine (32), and the compression spring (4) is compressed to generate compression force between a bearing ring (37) and a stop surface (332), and/or between a sealing sleeve (36) and the compression impeller (35), and/or between the sealing sleeve (36) and the bearing ring (37);
step 2, fixing the pressure impeller (35) on the shaft (33) in a welding mode;
and 3, loosening the compression tool (6) and taking out the turbocharger.
10. The method as claimed in claim 9, wherein the impeller (35) is provided with a receiving hole (351), and the compression spring (4) is disposed in the receiving hole (351).
CN201910725298.5A 2019-08-07 2019-08-07 Turbocharger and method of assembling a turbocharger Pending CN112343857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910725298.5A CN112343857A (en) 2019-08-07 2019-08-07 Turbocharger and method of assembling a turbocharger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910725298.5A CN112343857A (en) 2019-08-07 2019-08-07 Turbocharger and method of assembling a turbocharger

Publications (1)

Publication Number Publication Date
CN112343857A true CN112343857A (en) 2021-02-09

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Application Number Title Priority Date Filing Date
CN201910725298.5A Pending CN112343857A (en) 2019-08-07 2019-08-07 Turbocharger and method of assembling a turbocharger

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053261A (en) * 1974-12-04 1977-10-11 Mtu Motoren-Und Turbinen Union Munchen Gmbh Impeller for a high-speed turbomachine
US4705463A (en) * 1983-04-21 1987-11-10 The Garrett Corporation Compressor wheel assembly for turbochargers
CN101057078A (en) * 2004-11-13 2007-10-17 奥尔塞特工程有限公司 Compressor wheel
CN205422846U (en) * 2015-03-09 2016-08-03 卡特彼勒公司 Turbo charger and explosive motor
CN206338121U (en) * 2016-12-05 2017-07-18 成军 Radial-flow turbocharger
WO2018174103A1 (en) * 2017-03-22 2018-09-27 株式会社Ihi Rotating body, supercharger, and rotating body manufacturing method
JPWO2017203917A1 (en) * 2016-05-25 2019-03-14 株式会社Ihi Rotating body and turbocharger
EP3460252A1 (en) * 2017-09-25 2019-03-27 Garrett Transportation I Inc. Turbocharger compressor wheel assembly

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053261A (en) * 1974-12-04 1977-10-11 Mtu Motoren-Und Turbinen Union Munchen Gmbh Impeller for a high-speed turbomachine
US4705463A (en) * 1983-04-21 1987-11-10 The Garrett Corporation Compressor wheel assembly for turbochargers
CN101057078A (en) * 2004-11-13 2007-10-17 奥尔塞特工程有限公司 Compressor wheel
CN205422846U (en) * 2015-03-09 2016-08-03 卡特彼勒公司 Turbo charger and explosive motor
US20160265386A1 (en) * 2015-03-09 2016-09-15 Caterpillar Inc. Turbocharger with Low Carbon Steel Shaft
JPWO2017203917A1 (en) * 2016-05-25 2019-03-14 株式会社Ihi Rotating body and turbocharger
CN206338121U (en) * 2016-12-05 2017-07-18 成军 Radial-flow turbocharger
WO2018174103A1 (en) * 2017-03-22 2018-09-27 株式会社Ihi Rotating body, supercharger, and rotating body manufacturing method
EP3460252A1 (en) * 2017-09-25 2019-03-27 Garrett Transportation I Inc. Turbocharger compressor wheel assembly

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Application publication date: 20210209