CN106640692A - Centrifugal compressor with induction wheel - Google Patents
Centrifugal compressor with induction wheel Download PDFInfo
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- CN106640692A CN106640692A CN201510708980.5A CN201510708980A CN106640692A CN 106640692 A CN106640692 A CN 106640692A CN 201510708980 A CN201510708980 A CN 201510708980A CN 106640692 A CN106640692 A CN 106640692A
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- inducer
- impeller
- centrifugal compressor
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- extension
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Abstract
The invention discloses a centrifugal compressor with an induction wheel. The centrifugal compressor comprises an air inlet way, an extension section, an impeller, a main shaft and a compressor shell. The compressor shell is internally provided with a guide vane. The guide vane is located between the induction wheel and the impeller. The main shaft is provided with the impeller and the induction wheel. The induction wheel is arranged in the air inlet way. The impeller is arranged at an outlet of the guide vane. The impeller and the induction wheel synchronously rotate along with the main shaft so that gas can be sucked in and compressed. Providing the centrifugal compressor higher in efficiency and wider in flow range is the technical purpose; and according to the compressor, under the situation that the high enough pressure is provided, the wide flow range can be provided as well, and the requirements of more producers can be met.
Description
Technical field
The present invention relates to Compressor Manufacturing field, particularly a kind of centrifugal compressor with inducer.
Background technology
Centrifugal compressor is mainly made up of rotor and stator two parts, and its operation principle is that gas is with rotation when impeller rotates at a high speed, under the action of the centrifugal force, gas is thrown in diffuser below, and no-man's-land is formed at impeller, and at this moment extraneous live gas enters impeller.Due to the development of chemical industry, various large chemical plants, the foundation of oil plant, centrifugal compressor just becomes compression and conveys the critical machine of various gases in Chemical Manufacture, and occupies extremely important status.As the achievement of aerodynamics research makesCentrifugal compressorEfficiency improve constantly, and due to high pressure sealing, the processing of low discharge narrow leaf wheel,Multi-oil wedge bearingDeng succeeding in developing for key problem in technology, the range of application for making centrifugal compressor greatly extends, so that may replace reciprocating compressor in many occasions, and greatly expands range of application.It is used in various technological processes, for conveying air, various process gas or mixed gas, and improves its pressure, and it all uses widely in industries such as machinery, chemical industry, building, petrochemical industry.
At present most of centrifugal compressors suffer from good performance, but in the occasion of mesolow, it is higher to the traffic requirement of compressor, efficiency also requires that higher occasion, common centrifugal compressor just can not meet require that for user, in order that centrifugal compressor has broader flow, solve the problems, such as that the flow of centrifugal compressor is less than normal, one kind is needed to meet pressure, and the centrifugal compressor that energy flow is required now.
The content of the invention
For the problem that above-mentioned centrifugal compressor is present, the technical purpose of the present invention is to provide a kind of scope in hgher efficiency, flow more broad centrifugal compressor, in the case that this compressor can provide sufficiently high pressure, also can provide than larger range of flow, disclosure satisfy that the demand of more producers.
The present invention is achieved through the following technical solutions：
A kind of centrifugal compressor with inducer, include air intake duct, extension, impeller, main shaft and casing, it is characterized in that, stator is installed, the stator is located between inducer and impeller, and impeller and inducer are provided with the main shaft in the casing, the inducer is arranged in air intake duct, the impeller is arranged on the outlet of stator, the impeller and inducer with main shaft synchronous axial system, so as to suck gas and by gas compression.
Due to said structure, due to installing existing impeller on main shaft, while being also equipped with inducer, inducer is arranged in air intake duct, it is closest to the impeller of the air inlet of centrifugal compressor, with impeller with main axis, after rotation, inducer sucks gas to inducer, and gas is slightly pressurizeed, gas flows to stator through inducer, and stator changes the flow direction of gas, makes the gas direction that stream enters impeller be optimal.
A kind of centrifugal compressor with inducer, the air intake duct is provided with extension, and inducer is provided with the extension, and the inner wall shape of the extension is smooth cylindrical.
Due to said structure, centrifugal compressor is provided with extension, is used for installing inducer in this extension, and inducer rotates with main shaft and sucks gas, the inwall of extension is the helical blade that smooth cylindrical can conveniently install inducer, while making the resistance of reduction gas extension.
A kind of centrifugal compressor with inducer, the inducer is aial flow impeller, the rotation direction of the inducer is identical with the rotation direction of impeller, the helical angle of the inducer is 25 °～60 °, and the spiral number of turns of the inducer are 3 circles, a diameter of D of the impeller, a diameter of d=0.6D of the inducer, the maximum outside diameter of the inducer is 2mm with the radial spacing inside extension, and the thickness of the inducer is 1.2 times of the blade of impeller, and the number of blade of the inducer is 1.
Due to said structure, the gas flow of the aial flow impeller structure suction of inducer is big, suction gas stability of flow；The rotation direction of inducer is identical with the rotation direction of impeller so that the direction of the gas that inducer is discharged is consistent with the optimal import direction of impeller；The number of blade of impeller is 1, so that impeller is simple and reliable, it it is 25 °～60 ° by the helical angle of inducer, in this spiral angle range, the efficiency highest of inducer, the number of turns of the helical blade of inducer is preferably 3 circles, a diameter of 0.6D of inducer, makes the air inflow of compressor enough, and the excessive number of turns can cause the whole size of compressor to increase excessive, in order that the intensity of inducer fully meets, the thickness of inducer is set to 2 times of blade of impeller.
A kind of centrifugal compressor with inducer, the series of the impeller determines by the pressure at expulsion of centrifugal compressor, and the impeller is radial flow impeller, quantity >=1 of the impeller.
The series of the impeller is determined by the discharge total pressure of centrifugal compressor with single-stage pressure at expulsion, the discharge total pressure of the centrifugal compressor is P, the single-stage pressure at expulsion of the centrifugal compressor is P ＇, the quantity N=P/P ＇ of the impeller, quantity >=1 of the impeller, the impeller is radial flow impeller.
Due to said structure, the series of impeller is determined according to compressor air-discharging gross pressure and single-stage pressure at expulsion, and because the impeller main task after inducer is, to gas pressurized, therefore impeller to be set into radial flow impeller, impeller quantity is at least 1.
A kind of centrifugal compressor with inducer, the stator is arranged in casing and not with main axis, the stator changes the direction that inducer discharges gas.
Due to said structure, the stator of centrifugal compressor is arranged in casing, and stator is fixed relative to casing, and the effect of stator is to change the direction that inducer discharges gas so that the gas direction for entering into impeller is the airintake direction for being adapted to impeller.
The invention has the beneficial effects as follows:
1st, by being provided with inducer in the extension of air intake duct, inducer rotates and gas is sucked in a large number, so as to increased the air inflow of compressor, so that the air inflow that impeller compresses within the unit interval increases, the gas that compressor is discharged is set not only reach specified pressure, and its range of flow is broader, so as to improve efficiency.
2nd, by being provided with fixed stator between inducer and impeller, stator can make the gas that inducer is discharged, and enter impeller by the direction stream of design, so that the intake efficiency of impeller is higher with operating efficiency.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Mark in figure：1 is air intake duct, 1-1 is extension, 2 is impeller, 3 is inducer, 4 is main shaft, 5 is casing.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in detail.
A kind of centrifugal compressor with inducer as shown in Figure 1, including air intake duct 1, extension 1-1, impeller 2, inducer 3, main shaft 4, casing 5, stator 6 is installed in the casing 5, the stator 6 is located between inducer 3 and impeller 2, impeller 2 and inducer 3 are installed, the inducer 3 is arranged in air intake duct 1, and the impeller 2 is arranged on the outlet of stator 6 on the main shaft 4, the impeller 2 and inducer 3 with the synchronous axial system of main shaft 4, so as to suck gas and by gas compression；The air intake duct 1 is provided with extension 1-1, and inducer 3 is provided with the extension 1-1, and the inner wall shape of the extension 1-1 is cylindric, and the extension 1-1 being provided with air intake duct 1 is primarily used to install inducer 3；The inducer 3 is aial flow impeller, the rotation direction of the inducer 3 is identical with the rotation direction of impeller 2, the helical angle of the inducer 3 is 25 °～60 °, 40 ° are generally selected, the spiral number of turns of the inducer 3 are 3 circles, a diameter of D of the impeller 2, a diameter of 0.6D of the inducer 3, the maximum outside diameter of the inducer 3 is 2mm with the radial spacing inside extension 1-, and the thickness of the helical blade A of the inducer is 2 times of the blade of impeller 3, and the number of blade of the inducer 3 is 1；The series of the impeller 2 is determined by the discharge total pressure of centrifugal compressor with single-stage pressure at expulsion, the discharge total pressure of the centrifugal compressor is P, the single-stage pressure at expulsion of the centrifugal compressor is P ＇, the quantity N=P/P ＇ of the impeller 2, quantity >=1 of the impeller 2, the impeller 2 is radial flow impeller；The stator 6 is arranged in casing 5 and rotates not with main shaft 4, and the stator 6 can change the direction that inducer 3 discharges gas；The air intake duct 1 is provided with extension 1-1, and in the extension 1-1 inducer 3 is provided with.
Embodiment 1：
This centrifugal compressor compressed media is air, the discharge total pressure of centrifugal compressor is 1mpa, the single-stage pressure at expulsion of centrifugal compressor is 0.2pma, inducer 3 is 1 in this example, and the quantity of impeller 2 is 5, stator 1, the inducer 3 of this compressor, the material of impeller 2 are cast steel, surface polishing, is characterized in that cost is relatively low, intensity is big, blade profile is controllable, efficiency high, and the spiral angle of inducer 3 is 40 °
The spiral number of turns of inducer 3 are 3 circles, a diameter of D=200 of impeller 2, the diameter d=0.6D=120 of the inducer 3, radial spacing inside the maximum outside diameter of inducer 3 and extension 1-1 is 2mm, and the thickness of the helical blade A of the inducer is 1.2 times of the blade of impeller 3, the thickness 5mm of helical blade A, the vane thickness of impeller 3 is 6mm, and the number of blade of the inducer 3 is 1；Stator 6 does not rotate with main shaft, and its effect is the flow direction for changing gas so that be relatively beneficial to the air inlet of impeller 2, the thickness of the blade of stator 6 is as thin as possible so that the gas flow for passing through is maximized, and the vane thickness of this example stator 6 is 3mm, the flow inlet angle of stator is 25 °, and efflux angles is 15 °；The air inlet angle of attack of impeller 2 is 12 °, thus enables to very much the air inlet angle of impeller 2 preferably, efficiency high.
After the main shaft of centrifugal compressor is rotated by prime mover, inducer 3 is with impeller 2 with main axis suction and compressed gas.Gas flows into air intake duct 1 through the import of compressor, inducer 3 forms vacuum after rotating at a high speed in extension 1-1, the blade shape of inducer 3 is axial-flow type, compared to radial flow impeller, the air inflow of axial--flow blading is bigger, gas is set to accelerate to enter compressor, stator 6 is made through pressurization and the gas and changing flow direction for accelerating, so that entering into the flow direction and the permissible value that size is the design of impeller 2 of the gas of impeller 2, the quantity of impeller 2 can be increased and decreased as needed, radial flow impeller is mainly to gas pressurized, the combination of two kinds of impellers, so that compressor is in hgher efficiency, flow is bigger.
Claims (5)
1. a kind of centrifugal compressor with inducer, including air intake duct（1）, extension（1-1）, impeller（2）, main shaft（4）And casing（5）, it is characterised in that the casing（5）Stator is inside installed（6）, the stator（6）Positioned at inducer（3）With impeller（2）Between, the main shaft（4）On impeller is installed（2）And inducer（3）, the inducer（3）Installed in air intake duct（1）It is interior, the impeller（2）Installed in stator（6）Outlet after, the impeller（2）And inducer（3）With main shaft（4）Synchronous axial system.
2. the centrifugal compressor with inducer according to claim 1, is characterized in that, the air intake duct（1）It is provided with extension（1-1）, the extension（1-1）Inducer is inside installed（3）, the extension（1-1）Inner wall shape be smooth cylindrical.
3. the centrifugal compressor with inducer according to claim 2, is characterized in that, the inducer（3）For aial flow impeller, the inducer（3）Rotation direction and impeller（2）Rotation direction it is identical, the inducer（3）Helical angle be 25 °～60 °, the inducer（3）Spiral number of turns be 3 circle, the impeller（2）A diameter of D, the inducer（3）A diameter of d=0.6D, the inducer（3）Maximum outside diameter and extension（1-1）Internal radial spacing is 2mm, the inducer（3）Helical blade A thickness be impeller（3）1.2 times of blade, the inducer（3）The number of blade be 1.
4. the centrifugal compressor with inducer according to claim 3, is characterized in that, the impeller（2）Series determined that the discharge total pressure of the centrifugal compressor is P with single-stage pressure at expulsion by the discharge total pressure of centrifugal compressor, the single-stage pressure at expulsion of the centrifugal compressor is P ＇, the impeller（2）Quantity N=P/P ＇, the impeller（2）Quantity >=1, the impeller（2）For radial flow impeller.
5. the centrifugal compressor with inducer according to claim 4, is characterized in that, the stator（6）It is fixedly mounted on casing（5）It is interior and not with main shaft（4）Rotate, the stator（6）Change inducer（3）Discharge the direction of gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510708980.5A CN106640692A (en) | 2015-10-28 | 2015-10-28 | Centrifugal compressor with induction wheel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510708980.5A CN106640692A (en) | 2015-10-28 | 2015-10-28 | Centrifugal compressor with induction wheel |
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| CN106640692A true CN106640692A (en) | 2017-05-10 |
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| CN201510708980.5A Pending CN106640692A (en) | 2015-10-28 | 2015-10-28 | Centrifugal compressor with induction wheel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725481A (en) * | 2017-10-10 | 2018-02-23 | 山东大学 | A kind of structure and method for improving centrifugal vapor compressor compression ratio |
| CN114109910A (en) * | 2021-12-01 | 2022-03-01 | 广东泰极动力科技有限公司 | Self-suction centrifugal high-pressure fan |
-
2015
- 2015-10-28 CN CN201510708980.5A patent/CN106640692A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725481A (en) * | 2017-10-10 | 2018-02-23 | 山东大学 | A kind of structure and method for improving centrifugal vapor compressor compression ratio |
| CN107725481B (en) * | 2017-10-10 | 2024-05-17 | 山东大学 | Structure and method for improving compression ratio of centrifugal vapor compressor |
| CN114109910A (en) * | 2021-12-01 | 2022-03-01 | 广东泰极动力科技有限公司 | Self-suction centrifugal high-pressure fan |
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Application publication date: 20170510 |