CN219733477U - Nozzle ring positioning structure - Google Patents
Nozzle ring positioning structure Download PDFInfo
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- CN219733477U CN219733477U CN202320389364.8U CN202320389364U CN219733477U CN 219733477 U CN219733477 U CN 219733477U CN 202320389364 U CN202320389364 U CN 202320389364U CN 219733477 U CN219733477 U CN 219733477U
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- nozzle ring
- positioning
- assembly
- supercharger
- turbine
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- 125000006850 spacer group Chemical group 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Supercharger (AREA)
Abstract
The nozzle ring positioning structure comprises a nozzle ring assembly arranged in a supercharger, wherein the nozzle ring assembly comprises a nozzle ring, one side of the nozzle ring is provided with a blade, and the other side of the nozzle ring is provided with a toggle disc assembly; at least one spacer is arranged on one side of the nozzle ring, which faces the turbine shell, and the outer end of the spacer is in contact with or has a gap with the turbine shell or a structural part on the turbine shell; the nozzle ring and the shell of the supercharger are radially positioned through positioning pins. The utility model provides a nozzle ring positioning structure, which omits a nozzle ring rear cover, effectively reduces the quality of a nozzle ring assembly, has simple positioning structure and low cost, improves the overall stability, reduces the elastic force requirement of a heat shield, and prolongs the service life of the overall supercharger.
Description
Technical Field
The utility model belongs to the technical field of turbochargers, and particularly relates to a nozzle ring positioning structure in a turbocharger.
Background
The turbocharging technology is widely applied to automobiles, wherein the turbocharger utilizes energy such as heat energy, kinetic energy, pressure energy and the like in exhaust gas discharged by an engine during operation to push a turbine in a turbine box, the turbine drives a coaxial impeller to form a rotor assembly, and the impeller compresses air sent by an air filter pipeline to enable the air to enter a combustion chamber of the engine after being pressurized. Turbochargers generally consist of components such as turbines, engine components, compressors, and the like.
In the turbocharger, the turbocharger with the adjustable blade structure is called as a VNT (virtual machine table) supercharger, and in the VNT supercharger, a nozzle ring assembly is arranged and comprises a nozzle ring, rotatable blades, a poking assembly and the like, wherein the nozzle ring is required to complete axial positioning and radial positioning in the supercharger so as to ensure complete assembly and efficient operation of the supercharger. Therefore, the utility model further designs and improves the positioning structure of the nozzle ring in the supercharger.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the nozzle ring positioning structure, which omits the nozzle ring rear cover, effectively reduces the quality of the nozzle ring assembly, has simple positioning structure and low cost, improves the overall stability, reduces the elastic force requirement of the heat shield, and prolongs the service life of the overall supercharger.
The utility model is solved by the following technical scheme.
The nozzle ring positioning structure comprises a nozzle ring assembly arranged in a supercharger, wherein the nozzle ring assembly comprises a nozzle ring, one side of the nozzle ring is provided with a blade, and the other side of the nozzle ring is provided with a toggle disc assembly; at least one spacer is arranged on one side of the nozzle ring, which faces the turbine shell, and the outer end of the spacer is in contact with or has a gap with the turbine shell or a structural part on the turbine shell; the nozzle ring and the shell of the supercharger are radially positioned through positioning pins.
A rear cover is arranged in a traditional nozzle ring assembly, the nozzle ring is connected with the rear cover through a distance pin, and then the nozzle ring is installed between a turbine shell and a central shell, so that positioning is realized, but the whole mass is large, the rear cover is installed in a suspended mode, and the distance pin is stressed greatly and is easy to break and fall off. In view of this, in the structure of the present utility model, the rear cover is eliminated, the overall mass is reduced, and the spacing between the nozzle ring and the turbine housing is defined by the spacers, ensuring the normal rotation of the vanes, i.e., the axial positioning of the nozzle ring assembly is achieved by the spacers. Meanwhile, in the utility model, radial positioning is carried out through the positioning pin, and the nozzle ring is placed to radially move and rotate.
In a preferred embodiment, the locating pins are provided on the outer surface of the nozzle ring, and the locating pins are inserted into holes in the nozzle ring and turbine housing to effect location. Such as: corresponding matched holes are formed in the outer surface of the nozzle ring and the inner surface of the turbine shell, and two ends of the locating pin are inserted into the holes respectively to achieve locating and prevent radial movement and rotation of the nozzle ring. The positioning pins may be provided in plurality as needed.
In a preferred embodiment, the locating pins are provided on the inner surface of the nozzle ring, which locating pins are inserted into holes in the nozzle ring and center housing to effect location. Such as: corresponding matched holes are formed in the inner surface of the nozzle ring and the outer surface of the central shell, and two ends of the locating pin are inserted into the holes respectively to realize locating and prevent radial movement and rotation of the nozzle ring. The positioning pins may be provided in plurality as needed.
In a preferred embodiment, a gap or a partial gap is formed between the radially outer surface of the nozzle ring and the radially inner surface of the turbine housing, so that the inner cavity is communicated with the cavity in the turbine housing, and the influence of the pressure before vortex on the heat shield is reduced.
In a preferred embodiment, the nozzle ring is mounted on the central housing with its radially inner surface positioned, the inner side of the nozzle ring projecting inwardly with a baffle ring, a gap being provided between the baffle ring and the central housing, in which gap a heat shield is provided.
Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a nozzle ring location structure, the lid behind the nozzle ring has been cancelled, has effectively reduced the quality of nozzle ring subassembly, and location simple structure, with low costs has improved holistic stability, has reduced the elasticity demand of heat exchanger, has improved whole booster's life.
Drawings
Fig. 1 is a schematic diagram of a VNT supercharger in the present utility model.
Fig. 2 is a cross-sectional view of a VNT supercharger in the present utility model.
Fig. 3 is an enlarged view of area a in fig. 2.
Fig. 4 is an enlarged view of the area A1 in fig. 3.
Fig. 5 is a schematic diagram of a shafting assembly and a nozzle ring assembly in a VNT supercharger according to the present utility model.
Fig. 6 is a schematic diagram of a shafting assembly and a nozzle ring assembly in a VNT supercharger according to the present utility model.
Fig. 7 is a perspective view of a nozzle ring in one embodiment of the present utility model.
Description of the embodiments
The utility model is described in further detail below with reference to the drawings and the detailed description.
In the following embodiments, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, and the embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.
Referring to fig. 1 to 7, a VNT supercharger, a nozzle ring and a positioning structure thereof according to the present utility model are as follows.
The VNT supercharger comprises a turbine assembly, a compressor assembly 1 and a central shell 4 arranged between the turbine assembly and the compressor assembly; a nozzle ring assembly is arranged between the turbine assembly and the central housing 4, and is driven by a driving assembly 3; the nozzle ring assembly comprises a nozzle ring 5, one side of the nozzle ring 5 is provided with a blade 52, and the other side is provided with a poking disc assembly; the turbine assembly comprises a turbine 61 and a turbine housing 2, wherein at least one spacer 531 is arranged on the side of the nozzle ring 5 facing the turbine housing 2, and the outer end of the spacer 531 is in contact with or has a gap with the turbine housing 2 or a structural member on the turbine housing 2.
In the present utility model, radial positioning of the nozzle ring assembly is accomplished by locating pins, such as: the locating pins are provided on the outer surface of the nozzle ring 5, and the locating pins are inserted into holes on the nozzle ring 5 and the turbine housing 2 to achieve location. Such as: corresponding matched holes are formed in the outer surface of the nozzle ring 5 and the inner surface of the turbine housing 2, and two ends of the positioning pin are respectively inserted into the holes to realize positioning and prevent radial movement and rotation of the nozzle ring 5. The positioning pins may be provided in plurality as needed.
Or: the locating pins are provided on the inner surface of the nozzle ring 5, which are inserted into holes in the nozzle ring 5 and the center housing 4 to achieve positioning. Such as: corresponding matching holes are formed in the inner surface of the nozzle ring 5 and the outer surface of the central shell 4, and two ends of the positioning pin are respectively inserted into the holes to realize positioning, so that radial movement and rotation of the nozzle ring 5 are prevented. The positioning pins may be provided in plurality as needed.
In a specific embodiment, as shown in fig. 7, 599 is provided on the outer surface of the nozzle ring 5, and correspondingly, corresponding holes are provided on the inner surface of the turbine housing, and positioning is performed by inserting rod-shaped positioning pins into the holes.
As can be seen from the above structure, in the VNT supercharger according to the present utility model, the rear cover and the distance pins are omitted, the overall mass is reduced, the risk of breakage of the distance pins is avoided, and the distance between the nozzle ring 5 and the turbine housing 2 is defined by the spacers 531, so that the normal rotation of the vanes is ensured.
In addition, in the conventional VNT turbocharger, a rear cover is provided on the turbine housing, and an R-arc structure is designed on the rear cover. In the present utility model, after the rear cover is removed, the inner wall of the turbine housing 2 is an R-arc inner wall 21 matching with the outer contour of the turbine 61, specifically, the R-arc inner wall 21 is formed by the inner wall of the turbine housing 2 body or by a structural member attached to the turbine housing 2 body; the turbine housing 2 is assembled on the central housing 4, and a gap 51 or a partial gap is formed between the radial outer surface of the nozzle ring 5 and the radial inner surface of the turbine housing 2, so that the inner cavity is communicated with the cavity in the turbine housing 2, and the influence of the pressure before vortex on the heat shield is reduced. The structure can effectively control the consistency of the clearance between the turbine 61 and the turbine shell 2, when the high-temperature heat deformation is carried out, the R arc inner wall 21 is not influenced by the deformation of the nozzle ring as an uneven assembly component, the risk of turbine shell cleaning can be effectively reduced, the efficiency of the whole structure is higher, and the service life is long.
In one embodiment of the present utility model, the turbine housing 2 is provided with a mounting groove, the mounting groove is provided with a positioning disc 53, and the outer end of the spacer 531 contacts with the positioning disc 53 or has a gap to define a space, so as to ensure the normal rotation of the blade.
Furthermore, in the present utility model, the nozzle ring 5 is positionally mounted on the center housing 4 by the radially inner surface 5a thereof, and a baffle ring 58 is projected inward from the inside of the nozzle ring 5, and a gap is provided between the baffle ring 58 and the center housing 4, and a heat shield is provided in the gap. The heat shield is required to elastically support or position the nozzle ring assembly, and the structure in the utility model reduces the weight of the whole nozzle ring assembly after the rear cover is removed, so that the elastic force requirement of the heat shield for supporting or positioning the nozzle ring 5 is reduced. In the traditional structure, although the elasticity can be improved by increasing the deformation of the heat shield at normal temperature, the heat shield is arranged at the high temperature end, so that the heat attenuation is obvious, namely the elasticity can be reduced at high temperature and high temperature, the load force can be reduced, and the requirement on materials is high. In the utility model, the design of the nozzle ring assembly reduces the elastic force by reducing the weight, and finally reduces the requirement on the grade of the heat shield material, thereby reducing the cost.
Further, the heat shield includes a first heat shield 62 and a second heat shield 63, inner ends of the first heat shield 62 and the second heat shield 63 abut on a step on the center housing 4 or a side wall of the step, and outer ends of the first heat shield 62 and the second heat shield 63 are stacked together and abut on an inner surface 5b of the retainer ring 58. The assembly structure is stable, and the heat insulation effect is good. In one embodiment, the second heat shield 63 is an elastic member; the inner ends of the first and second heat shields 62, 63 respectively abut against two steps or the side walls of the corresponding steps on the center housing 4. The assembly structure is stable, the elastic support effect is good, and the nozzle ring can be effectively pressed.
In addition, in the present utility model, the dial assembly includes a dial 54, a shift fork 55, and a driving handle 7, the nozzle ring 5 is provided with a sinking groove 541, the dial 54 is disposed in the sinking groove 541, and is positioned accurately, and when the dial moves circumferentially, the center of the dial is offset slightly relative to the center of the nozzle ring, so that the rotation angle of each slot on the nozzle ring for controlling the driven shift fork is the same, the rotation angle of each blade is the same, so that the airflow angle of each blade entering the turbine in the circumferential direction of the turbine is the same, and the turbine efficiency is improved.
In one embodiment of the utility model, the radial inner surface of the nozzle ring is not contacted with the central shell 4, but is positioned through the heat shield, so that the heat transfer of the central shell 4 during assembly can be effectively reduced, the influence of high temperature on the viscosity of lubricating oil of the central shell 4 is reduced, the coking of engine oil is prevented, and the running stability of the rotor is improved. Of course, the contact positioning can also be performed by a short cylinder between the nozzle ring and the central housing 4, which radial positioning is more accurate, but the cylinder height is minimized in order to reduce heat transfer.
In the utility model, the heat shield can elastically deform, and can well absorb the deformation caused by engine vibration and high temperature of waste gas; in addition, in the shifting disc assembly, the driven shifting fork and the driven shifting fork shaft are two parts, so that the connection requirement of the driven shifting fork and the friction and abrasion resistance requirement of the driven shifting fork shaft can be independently met; the driving shifting fork and the driving shifting fork shaft are two parts, so that the connection requirement of the driving shifting fork and the friction and abrasion resistance requirement of the driving shifting fork shaft can be independently met.
In addition, the step shaft for controlling the rotation of the dial 54 passes through the central housing 4, the central housing 4 is provided with the bushing 77, if the bushing 77 is not used, the abrasion between the step shaft and the hole of the central housing 4 will be serious, and the abrasion of the step shaft movement can be reduced under the condition that the material of the central housing 4 is unchanged by improving the material grade of the bushing. At the same time, the bushing 77 is mounted on the central housing 4 by interference, and the material of the bushing 77 is selected to meet the requirement of synchronous deformation at high temperature with the central housing 4, so as to prevent the bushing from loosening. The inner bore of the bushing 77 may be provided with a sealing ring, and a C-shaped sealing ring is provided between the turbine housing 2 and the center housing 4 for reducing leakage of exhaust gas into the atmosphere, improving efficiency of the turbine end, and reducing environmental pollution.
It can be seen from the above description that the present utility model provides a VNT supercharger, and a nozzle ring positioning structure thereof, which eliminates a nozzle ring rear cover, effectively reduces the mass of a nozzle ring assembly, has a simple positioning structure and low cost, improves the overall stability, reduces the elastic requirement of a heat shield, and improves the service life of the overall supercharger.
The scope of the present utility model includes, but is not limited to, the above embodiments, and any alterations, modifications, and improvements made by those skilled in the art are intended to fall within the scope of the utility model.
Claims (5)
1. The nozzle ring positioning structure comprises a nozzle ring assembly arranged in a supercharger, and is characterized in that the nozzle ring assembly comprises a nozzle ring (5), one side of the nozzle ring (5) is provided with a blade (52), and the other side of the nozzle ring is provided with a poking disc assembly;
at least one spacer (531) is arranged on one side of the nozzle ring (5) facing the turbine housing (2), and the outer end of the spacer (531) is in contact with or has a gap with the turbine housing (2) or a structural member on the turbine housing (2);
the nozzle ring (5) and the shell of the supercharger are radially positioned through positioning pins.
2. A nozzle ring positioning structure according to claim 1, characterized in that the positioning pins are provided on the outer surface of the nozzle ring (5), which positioning pins are inserted into holes in the nozzle ring (5) and the turbine housing (2) for positioning.
3. A nozzle ring positioning structure according to claim 1, characterized in that the positioning pins are provided on the inner surface of the nozzle ring (5), which positioning pins are inserted into holes in the nozzle ring (5) and the center housing (4) for positioning.
4. A nozzle ring positioning structure according to claim 1, characterized in that the radially outer surface of the nozzle ring (5) and the radially inner surface of the turbine housing (2) have a gap (51) or a partial gap therebetween.
5. A nozzle ring positioning structure according to claim 1, characterized in that the nozzle ring (5) is mounted on the center housing (4) by its radially inner surface (5 a) in a positioning manner, that the inner side of the nozzle ring (5) is inwardly extended with a retainer ring (58), that a gap is provided between the retainer ring (58) and the center housing (4), and that a heat shield is provided in the gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320389364.8U CN219733477U (en) | 2023-03-06 | 2023-03-06 | Nozzle ring positioning structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320389364.8U CN219733477U (en) | 2023-03-06 | 2023-03-06 | Nozzle ring positioning structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219733477U true CN219733477U (en) | 2023-09-22 |
Family
ID=88028927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320389364.8U Active CN219733477U (en) | 2023-03-06 | 2023-03-06 | Nozzle ring positioning structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219733477U (en) |
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2023
- 2023-03-06 CN CN202320389364.8U patent/CN219733477U/en active Active
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