CN217271008U - Compressor casing and turbo charger with low noise flow expands wide groove - Google Patents
Compressor casing and turbo charger with low noise flow expands wide groove Download PDFInfo
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- CN217271008U CN217271008U CN202220518942.9U CN202220518942U CN217271008U CN 217271008 U CN217271008 U CN 217271008U CN 202220518942 U CN202220518942 U CN 202220518942U CN 217271008 U CN217271008 U CN 217271008U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model discloses a compressor casing with low noise flow expands wide groove has solved prior art well flow and has widened the groove and only widen the design based on the flow of widening the compressor, and does not consider the problem of the aerodynamic noise that arouses from this, has flow and widens groove depth direction and extend to compressor casing outer wall, forms a high frequency amortization cavity, can subdue the beneficial effect of specific frequency's noise, and concrete scheme is as follows: the utility model provides a compressor casing with low noise flow expands wide groove, includes the impeller of compressor, is equipped with compressor casing inner wall in the compressor casing, the impeller of compressor sets up between compressor casing inner wall, enclose into annular gas flow passage between compressor casing inner wall and the compressor casing outer wall, the flow expands wide groove and runs through compressor casing inner wall and extend to on the compressor casing outer wall, the flow on the compressor casing inner wall expands wide groove and sets up at the big footpath transition point department of impeller of compressor.
Description
Technical Field
The utility model belongs to the technical field of engine turbocharging technique and specifically relates to a compressor casing and turbo charger with low noise flow expands wide groove.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The turbocharger is a device for supplying air to an air inlet channel of an internal combustion engine under the pressure exceeding atmospheric pressure, and is widely applied to power machinery, because a turbine works under high temperature and high rotating speed, no matter a thick blade is generally adopted to reduce the thermal deformation caused by high temperature and high speed, but the through-flow capacity of the turbine is limited, so that a flow broadening groove is arranged for workers to widen the flow range of a low air inlet flow area;
the flow widening groove in the prior art is only based on the flow widening design of the widening compressor, but the problem of aerodynamic noise caused by the flow widening groove is not considered, and the flow widening groove arranged at the edge of the pressure impeller can cause aerodynamic noise generated by disturbance of the pressure impeller on the surrounding air and reversely transmitted to the port of the compressor through the flow widening groove, so that the risk of the aerodynamic noise of the compressor is greatly increased;
in summary, the current flow widening slot can only realize the flow widening of the gas compressor, and does not have the effect of simultaneously suppressing high-frequency pneumatic noise, and the difference of the slotting position, the slotting width and the slotting angle of the flow widening slot can generate the vital influence on the pneumatic noise.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a compressor housing and turbo charger with low noise flow expands wide groove, not only can realize that the regional flow of compressor low flow widens, can reduce the aerodynamic noise that impeller disturbance ambient air produced simultaneously.
In order to achieve the above purpose, the present invention is realized by the following technical solution:
the utility model provides a compressor casing with low noise flow expands wide groove, includes the compressor wheel, is equipped with compressor casing inner wall in the compressor casing, the compressor wheel sets up between compressor casing inner wall, enclose into annular airflow channel between compressor casing inner wall and the compressor casing outer wall, the flow expands wide groove and runs through compressor casing inner wall and extend to on the compressor casing outer wall, the flow on the compressor casing inner wall expands wide groove setting at compressor wheel major diameter transition point department.
The compressor casing with the low-noise flow widening groove is characterized in that a guide ring is arranged above the annular airflow channel, one side of the guide ring is connected with the outer wall of the compressor casing, and the other side of the guide ring is located above the inner wall of the compressor casing by a set distance.
The compressor casing with the low-noise flow widening groove has the advantages that the annular gap is formed between the guide ring and the inner wall of the compressor casing.
A compressor casing having a low noise flow widening slot as described above, said compressor casing inner wall enclosing an air inlet cavity.
The compressor casing with the low-noise flow widening groove is obliquely arranged at a certain angle with the axial direction of the compressor casing.
A compressor case having a low noise flow widening slot as described above, said flow widening slot having an angle of 45 ° to 60 ° with the axial direction of said compressor case.
A compressor casing having a low noise flow widening slot as described above, said inlet cavity communicating with said annular gas flow passage through said annular gap.
A compressor case having a low noise flow widening slot as described above, said flow widening slot extending to a depth of said compressor case outer wall greater than one-half the width of said flow widening slot.
A compressor case as described above having a low noise flow widening slot extending to a depth of said compressor case outer wall less than three-thirds the width of said flow widening slot.
In a second aspect, the present invention provides a turbocharger comprising a compressor housing having a low noise flow widening slot as described above.
Above-mentioned the utility model has the advantages as follows:
1) the utility model discloses a set up the flow and expand the wide groove, under large-traffic operating mode, waste gas can expand the wide groove through the flow and flow out and press the impeller, has increased the through-flow capacity who presses the impeller, has also compromise the acting efficiency who presses the impeller simultaneously, can effectual promotion press the jam flow limit of impeller.
2) The utility model discloses a compressor casing with low noise flow expands wide groove opens the flow that has certain width and extends to the compressor outer wall through on the compressor inner wall and expands wide groove, and based on the detailed design of the characteristic of making an uproar that falls, widen groove one end setting at the big footpath transition point department of impeller with the flow, form a high frequency amortization cavity, realize the intercommunication of air current under certain condition, can subdue specific frequency's noise, the structural optimization design in special flow expands wide groove can effectual suppression booster compressor high frequency aerodynamic noise, neither increase cost, also influence compressor flow performance efficiency.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to constitute a limitation on the invention.
Fig. 1 is a schematic structural view of a compressor casing in the prior art.
Fig. 2 is a simplified schematic diagram of a compressor casing having a low noise flow widening slot according to one or more embodiments of the present invention.
Fig. 3 is a detailed structural schematic diagram of a compressor casing having a low noise flow widening slot in accordance with one or more embodiments of the present invention.
Fig. 4 is an enlarged view of a portion of the structure of fig. 3.
In the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the schematic is shown only schematically.
Wherein: 1. the compressor comprises a guide ring, 2. a compressor shell, 3. a flow widening groove, 4. a pressure impeller, 5. an inner wall of the compressor shell, 6. an outer wall of the compressor shell, 7. an annular airflow channel and 8. a large-diameter transition point of the pressure impeller.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
as described in the background of the invention, the flow widening grooves in the prior art are based only on the flow widening design of the widening compressor, and do not consider the problem of aerodynamic noise caused thereby.
Example one
The utility model discloses an among the typical embodiment, refer to fig. 1-4 and show, a compressor casing 2 with low noise flow expands wide groove, including compressor casing 4, be equipped with compressor casing inner wall 5 in the compressor casing 2, compressor casing 4 sets up between compressor casing inner wall 5, encloses into annular airflow channel 7 between compressor casing inner wall 5 and the compressor casing outer wall 6, and annular airflow channel 7's top sets up to water conservancy diversion ring 1, and one side that water conservancy diversion ring 1 is close to compressor casing outer wall 6 is connected with compressor casing outer wall 6, and the opposite side of keeping away from compressor casing outer wall 6 is located compressor casing inner wall 5 tops and sets for the distance.
Specifically, an annular gap is formed between the guide ring 1 and the inner wall 5 of the compressor shell, an air inlet cavity is enclosed in the inner wall 5 of the compressor shell, and the air inlet cavity is communicated with the annular airflow channel 7 through the annular gap.
It should be noted that the guide ring 1 is a circular ring structure designed and installed on the inner side of the outer wall 6 of the compressor casing at the inlet of the compressor casing 2, and is composed of guide vanes, so that compressed air is guided to a correct entry angle of the next stage, and the guide ring has a guiding effect on air;
the flow widening groove 3 penetrates through the inner wall 5 of the compressor shell and extends to the outer wall 6 of the compressor shell, specifically, the flow widening groove 3 on the inner wall 5 of the compressor shell faces the impeller chamber of the pressure impeller 4, the other end of the flow widening groove extends towards the outer wall 6 of the compressor shell, and the end point of the flow widening groove 3 on the inner wall 5 of the compressor shell is specifically arranged at the major diameter transition point 8 of the pressure impeller.
The flow widening groove 3 is a bypass flow channel which is arranged on the compressor shell and used for widening the flow boundary of a low-flow area of the compressor, and has the function of widening the flow.
The flow widening groove 3 is obliquely arranged at a certain angle with the axial direction of the compressor housing, specifically, the included angle beta between the flow widening groove 3 and the axial direction (air inlet direction) of the compressor housing 2 is 45-60 degrees, and the following relations are satisfied: beta is more than or equal to 45 degrees and less than or equal to 60 degrees
The angle between the flow widening slot 3 and the axial direction of the compressor casing 2 is 50 deg. in this embodiment.
As shown in fig. 3 and 4, the depth D4 of the flow widening groove 3 extending to the outer wall of the compressor casing is greater than one-half the width D2 of the flow widening groove, and the depth D4 of the flow widening groove 3 extending to the outer wall of the compressor casing is less than three-half the width of the flow widening groove 3, i.e. the relationship between the depth D4 of the portion of the flow widening groove 3 extending to the outer wall of the compressor casing and the width of the flow widening groove is satisfied: 0.5 × D2 < D4 < 1.5 × D2, in this example, D4 ═ D2.
It should be noted that the depth D4 at which the flow widening slot 3 extends to the compressor casing outer wall 6 is expressed as: the final radial distance from the inner side of the compressor casing outer wall 6 to the flow widening slot to the compressor casing outer wall 6; the width D2 of the flow widening slot is expressed as: the width of the flow widening slot in the air inlet direction of the compressor shell is the axial direction of the compressor shell.
In addition, the position of the flow widening slot 3 is indicated by the distance D1: the distance from the top end of the large diameter of the pressure impeller to the transition point of the large diameter of the pressure impeller in the air inlet direction (axial direction) of the compressor casing 2, wherein the transition point 8 of the large diameter of the pressure impeller is expressed as: at the point on the impeller where the diameter of the impeller begins to change over, the major diameter of the impeller is expressed as: the pressure impeller 4 transitions in diameter to the largest portion.
The position of the large-diameter transition point 8 of the impeller is represented by a distance D3 as: the distance from the large-diameter bottom end of the pressure impeller to the large-diameter transition point 8 of the pressure impeller in the air inlet direction (axial direction) of the compressor shell.
The relation formula that the position D1 of the flow widening groove 3 and the position D3 of the large-diameter transition point 8 of the impeller meet is as follows: d3/2 < D1 < D3, and the position D1 of the flow widening groove 3 in this embodiment is 3/4 × D3;
the width D2 of the flow widening groove 3 is determined by the small diameter phi 1 of the medium-pressure impeller and the large diameter phi 2 of the pressure impeller in the compressor casing 2, and the small diameter phi 1 of the pressure impeller is expressed as: the minimum diameter of the blades of the pressure impeller can also be expressed as the diameter of the blades of the pressure impeller 4 which is not changed excessively, and the major diameter phi 2 of the pressure impeller is expressed as follows: the compressor casing 2 has a transitional maximum diameter of the blades of the intermediate pressure impeller 4.
The width D2 of the flow widening groove 3 and the small diameter phi 1 and the large diameter phi 2 of the pressure impeller of the air compressor meet the following relation: 10 (Φ 1/Φ 2)2 ≦ D2 ≦ 15 (Φ 1/Φ 2)2, and in this example, D2 ≦ 12 (Φ 1/Φ 2) 2.
The design can better keep the high-frequency pneumatic noise, the high-frequency pneumatic noise is restrained through the flow channel design of the flow widening groove of the gas compressor, and the unreasonable grooving position, angle and depth can increase the transmission of the high-frequency pneumatic noise, so that the embodiment realizes that the flow widening groove not only has the flow widening effect on the premise of not influencing the flow widening, but also is designed to the outer wall of the gas compressor through the extension of the flow widening groove in the depth direction to form a high-frequency silencing cavity, and the noise with specific frequency can be reduced and the noise radiation can be reduced.
Example two
The utility model provides a turbocharger, it includes embodiment one the compressor casing that has low noise flow expands wide groove, through the big footpath transition point 8 departments of pressure impeller at compressor casing 2 offer the flow and expand wide groove structure, and special flow is widened groove structure optimization design and can be effectively restrained booster compressor high frequency aerodynamic noise, and the costneutrality does not influence compressor flow performance efficiency.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a compressor casing with low noise flow expands wide groove, its characterized in that, includes the pressure impeller, is equipped with compressor casing inner wall in the compressor casing, the pressure impeller sets up between compressor casing inner wall, enclose into annular gas flow channel between compressor casing inner wall and the compressor casing outer wall, the flow expands wide groove and runs through compressor casing inner wall and extend to on the compressor casing outer wall, the flow on the compressor casing inner wall expands wide groove setting at pressure impeller major diameter transition point department.
2. The compressor case with a low noise flow widening groove of claim 1, wherein a deflector ring is positioned above the annular gas flow passage, one side of the deflector ring being connected to the outer wall of the compressor case and the other side being positioned a set distance above the inner wall of the compressor case.
3. The compressor case having a low noise flow widening groove of claim 2, wherein an annular gap is formed between said deflector ring and an inner wall of said compressor case.
4. The compressor case having a low noise flow widening slot as recited in claim 3, wherein said compressor case inner wall encloses an air intake cavity.
5. A compressor case having a low noise flow widening slot as recited in claim 1, wherein said flow widening slot is angled at an angle to an axial direction of said compressor case.
6. The compressor case having a low noise flow widening slot as recited in claim 5, wherein an angle between said flow widening slot and an axial direction of said compressor case is 45 ° -60 °.
7. The compressor case having a low noise flow widening slot as recited in claim 4, wherein said inlet cavity communicates with said annular gas flow passage through said annular gap.
8. The compressor case having a low noise flow widening slot as recited in claim 1, wherein said flow widening slot extends to a depth of said compressor case outer wall greater than one-half the width of said flow widening slot.
9. The compressor case having a low noise flow widening slot of claim 8, wherein the depth to which the flow widening slot extends to the compressor case outer wall is less than three-thirds the width of the flow widening slot.
10. A turbocharger comprising a compressor housing having a low noise flow widening slot as recited in any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220518942.9U CN217271008U (en) | 2022-03-09 | 2022-03-09 | Compressor casing and turbo charger with low noise flow expands wide groove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220518942.9U CN217271008U (en) | 2022-03-09 | 2022-03-09 | Compressor casing and turbo charger with low noise flow expands wide groove |
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| CN217271008U true CN217271008U (en) | 2022-08-23 |
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| CN202220518942.9U Active CN217271008U (en) | 2022-03-09 | 2022-03-09 | Compressor casing and turbo charger with low noise flow expands wide groove |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117436210A (en) * | 2023-12-18 | 2024-01-23 | 潍柴动力股份有限公司 | Combined design method and device for widening flow grooves and impellers |
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2022
- 2022-03-09 CN CN202220518942.9U patent/CN217271008U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117436210A (en) * | 2023-12-18 | 2024-01-23 | 潍柴动力股份有限公司 | Combined design method and device for widening flow grooves and impellers |
| CN117436210B (en) * | 2023-12-18 | 2024-03-19 | 潍柴动力股份有限公司 | Combined design method and device for widening flow grooves and impellers |
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