CN105065328B - A kind of double flute for centrifugal compressor automatically adjusts casing processing unit - Google Patents
A kind of double flute for centrifugal compressor automatically adjusts casing processing unit Download PDFInfo
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- CN105065328B CN105065328B CN201510477023.6A CN201510477023A CN105065328B CN 105065328 B CN105065328 B CN 105065328B CN 201510477023 A CN201510477023 A CN 201510477023A CN 105065328 B CN105065328 B CN 105065328B
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Abstract
The invention provides a kind of double flute for centrifugal compressor to automatically adjust casing processing unit, including compressor casing, and the compressor casing porch sets a spiral case cavity volume；The compressor casing is provided with the preceding groove and pit that spiral case cavity volume leads to compressor internal cavity, and the preceding groove is being axially located the impeller edge close to impeller, and the pit is at the primary blades axially adjacent to impeller or splitterr vanes aditus laryngis；Setting one can be in the disk valve that compressor is free to move axially in the spiral case cavity volume, on the compressor casing front limit structure and rear position limiting structure are respectively equipped with the both sides of disk valve, between preceding groove and pit, the rear position limiting structure is arranged on behind pit the front limit structure setting.Relative to prior art, the present invention has the advantage that：Double flute hub is controlled using the valve that can automatically switch in the installation of compressor casing entrance, widens compressor operating flow range.
Description
Technical field
The invention belongs to turbo-charger technical field, is adjusted automatically more particularly, to a kind of double flute for centrifugal compressor
Save treated casing device.
Background technology
To coordinate the reciprocal course of work of internal combustion engine, turbocharger air compressor needs to work in wide range of flow.Cause
For when low engine speeds operate, compressor flow is smaller, causes high compressor pressure ratio, causes compressor that surge occurs
And then air inlet can not be provided for engine；When the high rotation speed operation of engine, compressor flow is big, but may result in compressor
Obstruction, compressor efficiency is caused to decline the air-flow that can not provide abundance for engine.
In the prior art, various ways widen compressor operating flow range, compressor casing processing is it
In a kind of simple and effective method.As shown in figure 1, manufacturing a spiral case cavity volume 5 in the porch of compressor casing 1, spiral case holds
Chamber 5 is in the air intake duct of compressor in itself, additionally to process the groove connection spiral case cavity volume and hub of a circumference.When calming the anger
Machine work is when closing on stall and surge, the stator edge entrapped air volume of impeller 9 and along rim clearance between impeller 9 and compressor casing 1
The gas of adverse current will squeeze through groove and cavity, into compressor inlet.These counter-current flows either flow back to impeller eye, or by
Discharge, this will largely improve compressor surge.
But when compressor work closes on blocked state, the fresh air of inlet duct or flexible pipe can by cavity and
Groove, directly it is inhaled into through impeller vane leading edge in impeller, this adds increased compressor blocking traffic, degree depends on groove and led relatively
Leaf leading edge is in axial location.
In order to improve compressor surge, the axial location of groove is needed close to impeller vane leading edge, if but increase compressor
Blocking traffic, groove are then needed away from impeller vane leading edge, and close to impeller vane piece aditus laryngis, or if impeller has splitterr vanes
And if splitterr vanes limitation compressor flow, groove will be further from impeller vane leading edge and close to impeller splitterr vanes aditus laryngis.
It can be seen that scheme as shown in Figure 1 can not meet to increase blocking traffic while improving surge, it is only capable of two functions two of compromise and selects
One.
The content of the invention
In view of this, the present invention is directed to propose a kind of double flute for centrifugal compressor automatically adjusts casing processing unit,
To widen compressor operating flow range.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of double flute for centrifugal compressor automatically adjusts casing processing unit, including compressor casing, the compressor
Shell porch sets a spiral case cavity volume, and spiral case cavity volume is in the air intake duct of compressor；The compressor casing holds provided with spiral case
Chamber leads to the preceding groove and pit of compressor internal cavity, and the preceding groove is being axially located the impeller edge close to impeller, after described
Groove is at the primary blades axially adjacent to impeller or splitterr vanes aditus laryngis；Setting one can be in compressorshaft to certainly in the spiral case cavity volume
By mobile disk valve, front limit structure and rear position limiting structure, institute are respectively equipped with the compressor casing on the both sides of disk valve
Front limit structure setting is stated between preceding groove and pit, the rear position limiting structure is arranged on behind pit；The disk valve exists
Between preceding groove and pit and spiral case cavity volume in the presence of barometric gradient, automatically adjust from front limit structure and rear position limiting structure
Between position.
Further, the front limit structure is the fixed seal ring being arranged on compressor casing.
Further, the rear position limiting structure is to the cavity volume step that spiral case cavity volume is raised on compressor casing.
Further, the disk valve is made up of light metal or heat resistant plastice.
Further, the disk valve is provided with some ledge structures in the one side in face of impeller trailing edge.
Further, measured on the basis of impeller leading edge, the distance of preceding groove and benchmark should be in 2.5%-4.5%D
Between, the distance of pit and benchmark should be between 6%-9%D, and wherein D is the diameter of impeller outlet or impeller trailing edge.
Further, the circumference expanded- angle of the notch of the preceding groove and pit is between 90-120 degree.
Further, the circumferential position of the preceding groove and pit to be in positive and negative 5 degree of the circumferential position for casing tongue of calming the anger
Center.
Relative to prior art, the present invention has the advantage that：
(1) present invention controls double flute hub using the valve that can automatically switch in the installation of compressor casing entrance, widens pressure
Mechanism of qi operating flow range；
(2) present invention is reasonable in design, easily realizes, low manufacture cost.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of described conventional treated casing；
Fig. 2 is configuration state figure of the treated casing in the case where blocking operating mode described in the embodiment of the present invention；
Fig. 3 is treated casing described in the embodiment of the present invention close to the configuration state figure under surging condition；
Fig. 4 is the front view of disk valve described in the embodiment of the present invention.
Description of reference numerals：
1- compressor casings, groove before 2-, 3- pits, 4- disk valves, 5- spiral case cavity volumes, 6- fixed seal rings, 7- cavity volume steps,
8- impeller leading edges, 9- impellers, 10- impeller trailing edges, 11- ledge structures.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of double flute for centrifugal compressor automatically adjusts casing processing unit, as shown in Figure 2,3, including compressor casing
1, the porch of compressor casing 1 sets a spiral case cavity volume 5, and spiral case cavity volume 5 is in the air intake duct of compressor；The compressor
Shell 1 is provided with the preceding groove 2 and pit 3 that spiral case cavity volume 5 leads to compressor internal cavity, the axial location of the preceding groove 2 and the groove of pit 3
Should be between the impeller leading edge 8 of impeller 9 and impeller trailing edge 10, preceding groove 2 described in the present embodiment is being axially located the leaf close to impeller 9
Take turns at leading edge 8, the pit 3 is at the primary blades axially adjacent to impeller 9 or splitterr vanes aditus laryngis；
Setting one can be on the disk valve 4 that compressor is free to move axially, the compressor casing 1 in the spiral case cavity volume 5
Front limit structure and rear position limiting structure are respectively equipped with the both sides of disk valve 4, the front limit structure setting is in preceding groove 2 and pit
Between 3, the rear position limiting structure is arranged on behind pit 3；The disk valve 4 preceding groove 2 and pit 3 and spiral case cavity volume 5 it
Between in the presence of barometric gradient, automatically adjust from the position between front limit structure and rear position limiting structure.
The front limit structure is the fixed seal ring 6 being arranged on compressor casing 1, and its external diameter is in the internal diameter of disk valve 4
Between 105%-110%.
Position limiting structure is to the cavity volume step 7 that spiral case cavity volume 5 is raised on compressor casing 1 after described.
The disk valve 4 is made up of light metal or heat resistant plastice, as shown in figure 4, it is in the one side in face of impeller trailing edge 10
Provided with some ledge structures 11, realize when disk valve 4 is in most rearward position, the part of spiral case cavity volume 5 behind disk valve 4 with
There is gas channel between impeller 9, air-flow passes through pit 3.
Being measured on the basis of impeller leading edge 8, the distance of preceding groove 2 and benchmark should be between 2.5%-4.5%D, this
Sample can make compressor play the effect of maximum under surging condition；The distance of pit 3 and benchmark should between 6%-9%D,
So that compressor plays the effect of maximum in the case where blocking operating mode, wherein D is the diameter of impeller outlet or impeller trailing edge 10.
If a diameter of D of impeller trailing edge 10, then the axial width of preceding groove 2 and pit 3 should be between 2.5%-4.5%D, this
Sample can ensure enough air-flows, and reduce tip leakage caused by fluting.
The circumference expanded- angle of the notch of the preceding groove 2 and pit 3 is between 90-120 degree, different from conventional treated casing
360 degree of structure, to ensure enough actual internal areas, and the blade tip leakage of impeller will not be increased and influence compressor effect
Rate.
The circumferential position of the preceding groove 2 and pit 3 should centered on the circumferential position for casing tongue of calming the anger, preferably with
Centered on calming the anger in positive and negative 5 degree of the circumferential position of casing tongue.
The operation principle of technical solution of the present invention is based on the pressure difference between compressor inlet and hub, and along the quiet of hub
Pressure distribution.When compressor works under peak efficiency, pressure difference very little, pit 3, which opens or closes, does not affect work, so dress
Putting to work, and also do not interfere with the performance of compressor.When compressor block and surging condition under when, compressor inlet and
Pressure difference will be produced between hub.Barometric gradient can drive disk valve 4 to move to open or close pit 3, in compressor inlet
Additional air-flow is produced between impeller.
In the case where blocking operating mode, as shown in Fig. 2 the barometric gradient between the entrance of compressor casing 1 and impeller 9 points to impeller,
Therefore, disk valve 4 is pulled to the position of cavity volume step 7 under pressure, and now pit 3 is opened, and the front portion of spiral case cavity volume 5 is led to
The entrance of compressor；Bypass flow passes through impeller leading edge 8, and a part enters impeller 9 by pit 3 from compressor inlet, therefore
Add gas mass flow during turbocharger obstruction.
During close to surging condition, as shown in figure 3, same barometric gradient now points to compressor inlet, due to pit 3
Static pressure is higher than spiral case cavity volume 5, and disk valve 4 can be promoted at fixed seal ring 6 to the left, between pit 3 and compressor inlet
Passage be closed, now enter compressor inlet back up through preceding groove 2 and spiral case cavity volume 5, therefore, now compressor surge gas
Stream reduces, and will not reduce the peak efficiency of booster (if back up through pit 3, the peak efficiency of compressor can drop
It is low).
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (8)
1. a kind of double flute for centrifugal compressor automatically adjusts casing processing unit, including compressor casing (1), the compressor
Shell (1) porch sets a spiral case cavity volume (5), and spiral case cavity volume (5) is in the air intake duct of compressor；It is characterized in that：It is described
Compressor casing (1) is provided with the preceding groove (2) and pit (3) that spiral case cavity volume (5) leads to compressor internal cavity, and the preceding groove (2) exists
It is axially located close to impeller leading edge (8) place of impeller (9), the pit (3) is in the primary blades axially adjacent to impeller (9) or shunting
At blade aditus laryngis；
Setting one can be in the disk valve (4) that compressor is free to move axially, the compressor casing (1) in the spiral case cavity volume (5)
On front limit structure and rear position limiting structure are respectively equipped with the both sides of disk valve (4), the front limit structure setting is in preceding groove (2)
Between pit (3), the rear position limiting structure is arranged on behind pit (3)；The disk valve (4) is in preceding groove (2) and pit
(3) between spiral case cavity volume (5) in the presence of barometric gradient, automatically adjust between front limit structure and rear position limiting structure
Position.
2. the double flute according to claim 1 for centrifugal compressor automatically adjusts casing processing unit, it is characterised in that：
The front limit structure is the fixed seal ring (6) being arranged on compressor casing (1).
3. the double flute according to claim 1 or 2 for centrifugal compressor automatically adjusts casing processing unit, its feature exists
In：Position limiting structure is to the cavity volume step (7) that spiral case cavity volume (5) is raised on compressor casing (1) after described.
4. the double flute according to claim 1 for centrifugal compressor automatically adjusts casing processing unit, it is characterised in that：
The disk valve (4) is made up of light metal or heat resistant plastice.
5. the double flute according to claim 1 for centrifugal compressor automatically adjusts casing processing unit, it is characterised in that：
The disk valve (4) is provided with some ledge structures (11) in the one side in face of impeller trailing edge (10).
6. the double flute according to claim 1 for centrifugal compressor automatically adjusts casing processing unit, it is characterised in that：
Measured on the basis of impeller leading edge (8), the distance of preceding groove (2) and benchmark should be between 2.5%-4.5%D, pit (3)
Distance with benchmark should be between 6%-9%D, and wherein D is the diameter of impeller outlet or impeller trailing edge (10).
7. the double flute according to claim 1 for centrifugal compressor automatically adjusts casing processing unit, it is characterised in that：
The circumference expanded- angle of the notch of the preceding groove (2) and pit (3) is between 90-120 degree.
8. the double flute according to claim 1 for centrifugal compressor automatically adjusts casing processing unit, it is characterised in that：
Centered on the circumferential position of the preceding groove (2) and pit (3) is in positive and negative 5 degree of the circumferential position for casing tongue of calming the anger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510477023.6A CN105065328B (en) | 2015-08-06 | 2015-08-06 | A kind of double flute for centrifugal compressor automatically adjusts casing processing unit |
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| CN201510477023.6A CN105065328B (en) | 2015-08-06 | 2015-08-06 | A kind of double flute for centrifugal compressor automatically adjusts casing processing unit |
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| CN105065328A CN105065328A (en) | 2015-11-18 |
| CN105065328B true CN105065328B (en) | 2017-11-14 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10570912B2 (en) | 2017-05-23 | 2020-02-25 | Ford Global Technologies, Llc | Slidable sleeve actuation system for a turbocharger compressor |
| CN107882773A (en) * | 2017-10-27 | 2018-04-06 | 合肥工业大学 | A kind of centrifugal compressor with airway tube and its turbocharger used |
| US11131312B2 (en) | 2017-12-05 | 2021-09-28 | Ford Global Technologies, Llc | Active casing treatment adapted with movable sleeve |
| US10851794B2 (en) | 2017-12-05 | 2020-12-01 | Ford Global Technologies, Llc | Active casing treatment adapted with movable sleeve |
| CN113175438A (en) * | 2021-03-16 | 2021-07-27 | 中国航发哈尔滨东安发动机有限公司 | Multi-channel compressor air-entraining circulating device of turboshaft engine and control method |
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| EP1233190B1 (en) * | 2001-02-20 | 2010-06-02 | MAN Diesel & Turbo SE | Centrifugal compressor |
| CN101749279A (en) * | 2010-02-09 | 2010-06-23 | 清华大学 | Centrifugal compressor asymmetric self-circulation treatment casing based on varied notching width |
| CN101761511A (en) * | 2010-02-09 | 2010-06-30 | 清华大学 | Asymmetric self-circulation processing machine box of centrifugal compressor with parabolic grooving widths |
| CN104019058A (en) * | 2014-06-27 | 2014-09-03 | 哈尔滨工程大学 | Gas-entraining recycling structure for cartridge receiver of centrifugal-type gas compressor with variable geometric dimension |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008208753A (en) * | 2007-02-26 | 2008-09-11 | Toyota Industries Corp | Centrifugal compressor |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1233190B1 (en) * | 2001-02-20 | 2010-06-02 | MAN Diesel & Turbo SE | Centrifugal compressor |
| CN101749279A (en) * | 2010-02-09 | 2010-06-23 | 清华大学 | Centrifugal compressor asymmetric self-circulation treatment casing based on varied notching width |
| CN101761511A (en) * | 2010-02-09 | 2010-06-30 | 清华大学 | Asymmetric self-circulation processing machine box of centrifugal compressor with parabolic grooving widths |
| CN104019058A (en) * | 2014-06-27 | 2014-09-03 | 哈尔滨工程大学 | Gas-entraining recycling structure for cartridge receiver of centrifugal-type gas compressor with variable geometric dimension |
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