CN109869203A - A kind of mixed-flow volute - Google Patents
A kind of mixed-flow volute Download PDFInfo
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- CN109869203A CN109869203A CN201711252910.9A CN201711252910A CN109869203A CN 109869203 A CN109869203 A CN 109869203A CN 201711252910 A CN201711252910 A CN 201711252910A CN 109869203 A CN109869203 A CN 109869203A
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- flow
- mixed
- volute
- sidewall
- runner
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Abstract
The present invention relates to a kind of mixed-flow volutes, the mixed-flow volute includes the first side wall by being obliquely installed, the mixed-flow runner that second sidewall and arc bottom wall are constituted, angle between second sidewall and volute radial direction is 44 °, and the first side wall and second sidewall are symmetrical arranged, so that the section of mixed-flow runner is tapered, so that the side wall of runner is no longer vertically arranged, this special structure causes to generate barometric gradient variation at aditus laryngis, make the speed of turbine inlet circumferential direction, pressure, very big variation can occur for flow angle, and the outlet-inclined impeller vane angle of mixed flow volute is consistent with the inlet angle of turbine, energy loss very little during air-flow enters turbine, performance is improved.
Description
Technical field
The present invention relates to turbocharger apparatus technical field, especially a kind of mixed-flow volute.
Background technique
Turbocharger is to drive the turbine in turbine to rotate acting, turbine using the high-temp waste gas of engine discharge
Axis drives the impeller high speed rotation in coaxial connected compressor, and compressed air, is supplied to engine high pressure, height in eccentric fashion
Density air.To which we can spray more fuel oils to engine, reaches and improve engine power, torque and reduce discharge etc.
Purpose.
In turbocharger traditional structure, volute belongs to a part of lift pump mechanism, and main function is to form whirlpool
Take turns the cavity of work and to disengaging conductance to supports turbine shaft and turbine rotary components, and integrally fixed matrix.Traditional
Volute is mostly radial-flow type volute, and as depicted in figs. 1 and 2, the runner 11 of radial-flow type volute 1 is by the vertical side with axially vertical setting
Wall 12 and the sloped sidewall of arc-shaped transition 13 constitute narrow aditus laryngis；The presence of vertical sidewall 12, so that radial-flow type volute is in height
Throat location has a pressure jump when fast, and mutation is larger, i.e. the pressure loss of the radial-flow type volute at aditus laryngis is very big, and
And gas is easy to happen stagnation phenomenon in radial-flow type volute throat location, temperature increases, and causes energy loss serious.
Summary of the invention
A kind of the technical problem to be solved in the present invention is to provide structures mixed-flow volute that is simple, avoiding pressure jump.
In order to solve the above technical problems, mixed-flow volute provided by the invention, including by being obliquely installed the first side wall,
The mixed-flow runner that two side walls and arc bottom wall are constituted, the angle between the second sidewall and volute radial direction is 44 °, and first
Side wall and second sidewall are symmetrical arranged, so that the section of mixed-flow runner is tapered.
Further, arc-shaped transition section is arranged in the intersection of the first side wall, second sidewall and arc bottom wall.
Further, rectangular aperture is set at the aditus laryngis of mixed-flow runner, and the front end of the rectangular aperture is obliquely installed.
The technical effect of invention: mixed-flow volute of the invention, compared with the existing technology, mixed-flow runner is by symmetrical and incline
The first side wall that is tiltedly arranged, second sidewall are constituted, so that the side wall of runner is no longer vertically arranged, the section of runner is tapered, and
Angle between second sidewall and volute radial direction is 44 °, and this special structure causes to generate barometric gradient variation at aditus laryngis,
Make the speed, pressure, flow angle of turbine inlet circumferential direction that can occur very big variation, and the outlet-inclined impeller vane angle of mixed flow volute and turbine
Inlet angle it is consistent, energy loss very little during air-flow enters turbine, performance is improved.
Detailed description of the invention
Invention is further described in detail with reference to the accompanying drawings of the specification:
Fig. 1 is the schematic perspective view of the radial-flow type volute of the prior art；
Fig. 2 is the schematic diagram of the section structure of the radial-flow type volute flow passage of the prior art；
Fig. 3 is the contrast schematic diagram of mixed-flow volute flow passage and radial-flow type volute flow passage positional relationship of the invention；
Fig. 4 is the velocity profile cloud charts of the radial-flow type volute of the prior art；
Fig. 5 is the velocity profile cloud charts of mixed-flow volute of the invention.
In figure: volute 1, runner 11, vertical sidewall 12, sloped sidewall 13, mixed-flow runner 14, the first side wall 15, second
Side wall 16, arc bottom wall 17, arc-shaped transition section 18, rectangular aperture 19.
Specific embodiment
The mixed-flow volute of 1 the present embodiment of embodiment, including the first side wall 15,16 and of second sidewall by being obliquely installed
The mixed-flow runner 14 that arc bottom wall 17 is constituted, as shown in figure 3, the angle between second sidewall 16 and volute radial direction is 44 °, and
The first side wall 15 and second sidewall 16 are symmetrical arranged, so that the section of mixed-flow runner 14 is tapered；The first side wall 15, second side
The identical arc-shaped transition section 18 of structure is respectively set in wall 16 and the intersection of arc bottom wall 17；It is set at the aditus laryngis of mixed-flow runner 14
Rectangular aperture 19 is set, the front end of the rectangular aperture 19 is obliquely installed, and the slanted angle between rectangular aperture 19 and horizontal direction
It is 19 °.As a comparison, using cfdrc ANSYS CFX 14.5 to radial-flow type volute and mixed-flow volute into
Row steady numerical simulation obtains radial-flow type volute flow passage and mixed-flow volute flow passage velocity profile distribution map, respectively Fig. 4 and figure
5, by Fig. 4 and the comparison of two figure of Fig. 5 it is found that radial-flow type volute has two radial direction tumble flows, and the gas inside volute in aditus laryngis
Body flow direction is circumferential, so that flowing is very complicated at aditus laryngis, there are biggish flow losses.But at mixed-flow volute aditus laryngis
Radial tumble flow it is obviously much smaller, internal disturbance is few, and for aerodynamic loss with regard to small, efficiency is also just higher.In low-speed region, using two kinds
Turbine is always not much different to quiet efficiency after isostructural volute；In high-speed region, mixed-flow volute, the property of turbine are used
It can compare and be significantly improved using radial-flow type volute, and being continuously increased with speed, the increment of efficiency is more obvious, because
This on the whole, the performance of mixed flow volute is better than runoff volute.
Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and is not to of the invention
The restriction of embodiment.For those of ordinary skill in the art, it can also be made on the basis of the above description
Its various forms of variation or variation.There is no necessity and possibility to exhaust all the enbodiments.And these belong to this hair
Bright spiritual changes and variations that derived from are still in the protection scope of this invention.
Claims (3)
1. a kind of mixed-flow volute, which is characterized in that including the first side wall, second sidewall and the arc bottom wall structure by being obliquely installed
At runner, the angle between the second sidewall and volute radial direction is 44 °, and the first side wall and second sidewall are symmetrical arranged,
So that the section of mixed-flow runner is tapered.
2. mixed-flow volute according to claim 1, which is characterized in that the first side wall, second sidewall and arcuate bottom
Arc-shaped transition section is arranged in the intersection of wall.
3. mixed-flow volute according to claim 1 or 2, which is characterized in that rectangular aperture is set at the aditus laryngis of runner, it should
The front end of rectangular aperture is obliquely installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711252910.9A CN109869203A (en) | 2017-12-01 | 2017-12-01 | A kind of mixed-flow volute |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711252910.9A CN109869203A (en) | 2017-12-01 | 2017-12-01 | A kind of mixed-flow volute |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109869203A true CN109869203A (en) | 2019-06-11 |
Family
ID=66914076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711252910.9A Withdrawn CN109869203A (en) | 2017-12-01 | 2017-12-01 | A kind of mixed-flow volute |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109869203A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374924A (en) * | 2019-07-23 | 2019-10-25 | 江苏大学镇江流体工程装备技术研究院 | A kind of mixed-flow pump |
-
2017
- 2017-12-01 CN CN201711252910.9A patent/CN109869203A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374924A (en) * | 2019-07-23 | 2019-10-25 | 江苏大学镇江流体工程装备技术研究院 | A kind of mixed-flow pump |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190611 |
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| WW01 | Invention patent application withdrawn after publication |