CN103410774A - Split type air guide impeller assembly of centrifugal compressor - Google Patents
Split type air guide impeller assembly of centrifugal compressor Download PDFInfo
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- CN103410774A CN103410774A CN2013103237283A CN201310323728A CN103410774A CN 103410774 A CN103410774 A CN 103410774A CN 2013103237283 A CN2013103237283 A CN 2013103237283A CN 201310323728 A CN201310323728 A CN 201310323728A CN 103410774 A CN103410774 A CN 103410774A
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Abstract
The invention discloses a split type air guide impeller assembly of a centrifugal compressor. At the present, an integrated air guide impeller is high in processing cost. The split type air guide impeller assembly comprises an air guide wheel, a wheel disc, a diversion cone and a high speed shaft, wherein the air guide wheel comprises an air guide wheel hub and a plurality of air guide wheel blades which are formed integrally, and the air guide wheel blades are curved surface sheet bodies; the wheel disc comprises a wheel disc hub and a plurality of wheel disc blades which are integrally formed; the diversion cone comprises a cone head, a diversion cone supporting shaft and a high speed shaft connecting shaft which are integrally formed and coaxially arranged; the high speed shaft comprises a high speed shaft installation shaft and a high speed shaft axial positioning shaft which are integrally formed and coaxially arranged; the air guide wheel and the wheel disc are connected through threads; the bottom of each air guide wheel blade of the air guide wheel is attached to the top of a corresponding wheel disc blade of the wheel disc; the diversion cone supporting shaft is arranged in a diversion cone supporting hole; the high speed shaft installation shaft is arranged in a high speed shaft installation hole; and the diversion cone and the high speed shaft are connected through high speed shaft connection threads. The split type air guide impeller assembly has the advantages of low processing cost, high accuracy and impeller strength and the like.
Description
Technical field
The invention belongs to field of mechanical technique, relate to centrifugal compressor, be specifically related to the split type impeller inducer assembly of a kind of centrifugal compressor.
Background technique
Centrifugal compressor uses the integrated type impeller inducer usually at present, and the method for manufacturing the integrated type impeller inducer has numerical control mill system and welding to manufacture two kinds.Numerical control mill system is on five number of coordinates control milling machines, to mill system by computer programming, and this processing method vane type line machining accuracy is high, reliable in quality, and impeller intensity is high, but five number of coordinates control milling machines are expensive, processing charges is high.Welding manufacture is first by the blade compression molding, one by one blade is welded on wheel disc, the shortcoming of this manufacture method is that the vane type line accuracy of manufacturing is low, is subjected to the impact of the factors such as compression molding, welding procedure and heat treatment again, quality is unstable, and impeller intensity is lower.
Usually impeller adopts conical surface to be connected or to be threaded with the Placement of axle.The conical surface mode that is connected is high to the requirement on machining accuracy of impeller conical surface and axle conical surface.The requirement on machining accuracy of thread connecting mode double thread is high.The precision of screw thread processing is high again, must gapped existence, when starting and docking process rotor reach critical speed of rotation vibration larger, between impeller and axle, may occur rotating, cause the dynamic balance accuracy variation.Before dispatching from the factory, centrifugal compressor must first carry out mechanical running-in test, and running-in test high speed rotor can not be with impeller operation, must remove carrying out dynamically balanced epitrochanterian two ends impeller, in order to keep dynamic balance accuracy, before dismounting, must carry out the groove mark that impeller and axle screw position, but owing between impeller and axle, having gap, after running-in, again load onto impeller and be tightened onto original groove position, dynamically balanced precision can not guarantee to reach original precision.
Summary of the invention
The objective of the invention is for the deficiencies in the prior art, provide a kind of centrifugal compressor split type impeller inducer assembly, have that processing cost is low, precision is high, the impeller intensity advantages of higher.
The present invention includes inducer, wheel disc, flow deflecting cone and high speed shaft.
Described inducer comprises integrated inducer wheel hub and a plurality of inducer blade.The inducer wheel hub is cylindrical shape, the cross section of cylinder inner cavity is the T font, the little part in aperture is the inducer mounting hole, the large part in aperture is inducer axially locating hole, the inducer mounting hole is opened on the end face of inducer wheel hub, inducer axially locating hole is opened on the bottom surface of inducer wheel hub, and the inwall of inducer mounting hole has been attacked internal thread.Described inducer blade is the curved surface lamellar body, and bi-side are the parabola that surface equation equates, the root of inducer blade is arranged on the outer wall of inducer wheel hub, and all inducer blades are along circumferentially being distributed on the inducer wheel hub.
Described wheel disc comprises integrated wheel disc wheel hub and a plurality of wheel disk blade, and the quantity of wheel disk blade equates with the quantity of inducer blade.The wheel disc wheel hub comprises coaxial setting, integrated inducer mounting portion and high speed shaft mounting portion.Described inducer mounting portion is cylindrical shape, its cross section is the T font, the part that external diameter is little is the inducer coupling shaft, the part that external diameter is large is inducer axially locating axle, inducer coupling shaft and inducer axially locating axle coaxially arrange, one-body molded, the outer wall of inducer coupling shaft has been attacked outside thread, and the length of inducer axially locating axle is less than the length in inducer axially locating hole; The top end face of inducer mounting portion offers the seal groove of ring, and the central shaft of inducer mounting portion is to offering the flow deflecting cone supported hole.
Described high speed shaft mounting portion integral body is the curved frustoconic shape of bus, offers vertically high speed shaft axial assist location hole and high speed shaft mounting hole.The high speed shaft mounting hole comprises three sections of coaxial setting, one end in first section high speed shaft mounting hole and the axial assist location of high speed shaft hole joins, the other end in the axial assist location of high speed shaft hole and an end of flow deflecting cone supported hole join, the other end of flow deflecting cone supported hole is opened on the end face of inducer mounting portion, and rear high speed shaft mounting hole is opened on the bottom surface of high speed shaft mounting portion; The aperture of rear high speed shaft mounting hole is greater than the aperture of first section high speed shaft mounting hole, and is less than the aperture of stage casing high speed shaft mounting hole, and the aperture in the axial assist location of high speed shaft hole is greater than the aperture of flow deflecting cone supported hole and the aperture of high speed shaft mounting hole; The madial wall of high speed shaft mounting hole offers the keyway of long strip vertically.
Described wheel disk blade integral body is the plane lamellar body, and root is arranged on the outer wall of high speed shaft mounting portion, and the top end face is plane, and with the coplanar setting of top end face of high speed shaft mounting portion, sidewall is the curved surface shape; All wheel disk blades are along circumferentially being distributed on the high speed shaft mounting portion.
Described flow deflecting cone comprises conehead, flow deflecting cone back shaft and the high speed shaft coupling shaft of one-body molded and coaxial setting, and the flow deflecting cone back shaft is arranged between conehead and high speed shaft coupling shaft; The top of conehead is the curved circular cone of bus, and bottom is cylindrical; On the circumferential surface of high speed shaft coupling shaft, be provided with the high speed shaft connecting thread.
Described high speed shaft comprises high speed shaft installation shaft and the high speed shaft axially locating axle of one-body molded and coaxial setting; The high speed shaft installation shaft comprises three sections of coaxial setting, and the external diameter of first section high speed shaft installation shaft, stage casing high speed shaft installation shaft, rear high speed shaft installation shaft equates with the aperture of first section high speed shaft mounting hole, stage casing high speed shaft mounting hole, rear high speed shaft mounting hole respectively; The sidewall of high speed shaft installation shaft is provided with rectangular groove vertically, and the top of high speed shaft installation shaft offers vertically flow deflecting cone tapped hole is installed.
The inducer coupling shaft of described wheel disc is arranged in the inducer mounting hole of inducer, and inducer and wheel disc are threaded connection; The inducer axially locating axle of wheel disc is arranged in the inducer axially locating hole of inducer, and the bottom end face of inducer is arranged on the end, top of the high speed shaft mounting portion of wheel disc wheel hub, and the top end face of inducer and the top end of wheel disc arrange in the face of neat; Each inducer blade bottom of described inducer fits with the corresponding wheel disk blade top of wheel disc.
Described flow deflecting cone back shaft is arranged in the flow deflecting cone supported hole, and the top end face of the bottom end face of conehead and inducer and the top end of wheel disc arrange in the face of neat, are provided with seal ring in the seal groove of inducer; Described high speed shaft installation shaft is arranged in the high speed shaft mounting hole, and the axle journal end of high speed shaft axially locating axle is arranged on the bottom end face place of wheel disc; The high speed shaft coupling shaft is arranged on flow deflecting cone and installs in tapped hole, and flow deflecting cone is connected by the high speed shaft connecting thread with high speed shaft; The split type impeller inducer of centrifugal compressor is realized axial restraint by the bottom end face of the conehead of flow deflecting cone and the axle journal end face of high speed shaft axially locating axle; The rectangular groove aligned in position of the keyway of wheel disc and high speed shaft, insert metallic bond, realizes the circumferentially spacing of wheel disc and high speed shaft.
Beneficial effect of the present invention:
1, inducer can machine on plain-milling machine, and the vane type line on wheel disc can adopt the pattern method to machine on plain-milling machine, and processing cost is low, precision is high, impeller intensity is high.
2, the Placement of high speed shaft and impeller inducer is interference fit, and high speed shaft connects and drive the impeller inducer rotation by key, is beneficial to the dismounting of impeller inducer; By flow deflecting cone and being connected of high speed shaft, realize the axially locating of impeller inducer.Therefore when rotor high-speed turns round,, there is not screw thread machining error phenomenon in the phenomenon that do not rotate between impeller inducer and high speed shaft yet and affects connection.
The accompanying drawing explanation
Fig. 1 is cross-sectional view of the present invention;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the plan view of inducer in the present invention;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is the sectional view of wheel disc in the present invention;
Fig. 6 is the side view of Fig. 5;
Fig. 7 is the structural representation of flow deflecting cone in the present invention;
Fig. 8 is the structural representation of high speed axle of the present invention;
Fig. 9 is the sectional view of Fig. 8.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As depicted in figs. 1 and 2, the split type impeller inducer assembly of a kind of centrifugal compressor comprises inducer 1, wheel disc 2, flow deflecting cone 3 and high speed shaft 4.
As shown in Figure 3 and Figure 4, inducer 1 comprises integrated inducer wheel hub 1-1 and 16 inducer blade 1-2.Inducer wheel hub 1-1 is cylindrical shape, the cross section of cylinder inner cavity is the T font, the little part in aperture is inducer mounting hole 1-3, the large part in aperture is inducer axially locating hole 1-4, inducer mounting hole 1-3 is opened on the end face of inducer wheel hub 1-1, inducer axially locating hole 1-4 is opened on the bottom surface of inducer wheel hub 1-1, and the inwall of inducer mounting hole 1-3 has been attacked internal thread.Inducer blade 1-2 is the curved surface lamellar body, and bi-side are the parabola that surface equation equates, the root of inducer blade 1-2 is arranged on the outer wall of inducer wheel hub 1-1, and all inducer blades are along circumferentially being distributed on inducer wheel hub 1-1.
As shown in Figure 5 and Figure 6, wheel disc 2 comprises integrated wheel disc wheel hub 2-1 and 16 wheel disk blade 2-2.Wheel disc wheel hub 2-1 comprises coaxial setting, integrated inducer mounting portion and high speed shaft mounting portion.The inducer mounting portion is cylindrical shape, its cross section is the T font, the part that external diameter is little is inducer coupling shaft 2-3, the part that external diameter is large is inducer axially locating axle 2-4, inducer coupling shaft 2-3 and inducer axially locating axle 2-4 coaxially arrange, one-body molded, the outer wall of inducer coupling shaft 2-3 has been attacked outside thread 2-5, and the length of inducer axially locating axle 2-4 is less than the length of inducer axially locating hole 1-4; The top end face of inducer mounting portion offers the seal groove 2-6 of ring, and the central shaft of inducer mounting portion is to offering flow deflecting cone supported hole 2-7.
High speed shaft mounting portion integral body is the curved frustoconic shape of bus, offers vertically the axial assist location of high speed shaft hole 2-8 and high speed shaft mounting hole 2-9.High speed shaft mounting hole 2-9 comprises three sections of coaxial setting, the end of first section high speed shaft mounting hole 2-9-1 and the axial assist location of high speed shaft hole 2-8 joins, the other end of the axial assist location of high speed shaft hole 2-8 and the end of flow deflecting cone supported hole 2-7 join, the other end of flow deflecting cone supported hole 2-7 is opened on the end face of inducer mounting portion, and rear high speed shaft mounting hole 2-9-3 is opened on the bottom surface of high speed shaft mounting portion; The aperture of rear high speed shaft mounting hole 2-9-3 is greater than the aperture of first section high speed shaft mounting hole 2-9-1, and be less than the aperture of stage casing high speed shaft mounting hole 2-9-2,2-8De aperture, the axial assist location of high speed shaft hole is greater than the aperture of flow deflecting cone supported hole 2-7 and the aperture of high speed shaft mounting hole 2-9; The madial wall of high speed shaft mounting hole 2-9 offers the keyway 2-10 of long strip vertically.
Wheel disk blade 2-2 integral body is the plane lamellar body, and root is arranged on the outer wall of high speed shaft mounting portion, and the top end face is plane, and with the coplanar setting of top end face of high speed shaft mounting portion, sidewall is the curved surface shape; All wheel disk blades are along circumferentially being distributed on the high speed shaft mounting portion.
As shown in Figure 7, flow deflecting cone 3 comprises conehead 3-1, flow deflecting cone back shaft 3-2 and the high speed shaft coupling shaft 3-3 of one-body molded and coaxial setting, and flow deflecting cone back shaft 3-2 is arranged between conehead 3-1 and high speed shaft coupling shaft 3-3; The top of conehead 3-1 is the curved circular cone of bus, and bottom is cylindrical; On the circumferential surface of high speed shaft coupling shaft 3-3, be provided with high speed shaft connecting thread 3-4.
As shown in Figure 8 and Figure 9, high speed shaft 4 comprises high speed shaft installation shaft 4-1 and the high speed shaft axially locating axle 4-2 of one-body molded and coaxial setting; High speed shaft installation shaft 4-1 comprises three sections of coaxial setting, and the external diameter of first section high speed shaft installation shaft 4-1-1, stage casing high speed shaft installation shaft 4-1-2, rear high speed shaft installation shaft 4-1-3 equates with the aperture of first section high speed shaft mounting hole 2-9-1, stage casing high speed shaft mounting hole 2-9-2, rear high speed shaft mounting hole 2-9-3 respectively; The sidewall of high speed shaft installation shaft 4-1 is provided with rectangular groove 4-3 vertically, and the top of high speed shaft installation shaft 4-1 offers vertically flow deflecting cone tapped hole 4-4 is installed.
As depicted in figs. 1 and 2, the inducer coupling shaft 2-3 of wheel disc is arranged in the inducer mounting hole 1-3 of inducer, and inducer 1 and wheel disc 2 are threaded connection; The inducer axially locating axle 2-4 of wheel disc is arranged in the inducer axially locating hole 1-4 of inducer, the bottom end face of inducer 1 is arranged on the end, top of the high speed shaft mounting portion of wheel disc wheel hub 2-1, and the top end face of inducer and the top end of wheel disc 2 arrange in the face of neat; Each inducer blade 1-2 bottom of inducer fits with the corresponding wheel disk blade 2-2 top of wheel disc.
Flow deflecting cone back shaft 3-2 is arranged in flow deflecting cone supported hole 2-7, and the top end face of the bottom end face of conehead 3-1 and inducer 1 and the top end of wheel disc 2 arrange in the face of neat, are provided with seal ring 5 in the seal groove 2-6 of inducer; High speed shaft installation shaft 4-1 is arranged in high speed shaft mounting hole 2-9, and the axle journal end of high speed shaft axially locating axle 4-2 is arranged on the bottom end face place of wheel disc 2; High speed shaft coupling shaft 3-3 is arranged on flow deflecting cone and installs in tapped hole 4-4, and flow deflecting cone 3 is connected by high speed shaft connecting thread 3-4 with high speed shaft 4; The split type impeller inducer of centrifugal compressor is realized axial restraint by the bottom end face of the conehead 3-1 of flow deflecting cone and the axle journal end face of high speed shaft axially locating axle 4-2; The rectangular groove 4-3 aligned in position of the keyway 2-10 of wheel disc 2 and high speed shaft 4, insert metallic bond 6, realizes the circumferentially spacing of wheel disc 2 and high speed shaft 4.
Claims (2)
1. the split type impeller inducer assembly of centrifugal compressor, comprise wind wheel, wheel disc, flow deflecting cone and high speed shaft, it is characterized in that:
Described inducer comprises integrated inducer wheel hub and a plurality of inducer blade; The inducer wheel hub is cylindrical shape, the cross section of cylinder inner cavity is the T font, the little part in aperture is the inducer mounting hole, the large part in aperture is inducer axially locating hole, the inducer mounting hole is opened on the end face of inducer wheel hub, inducer axially locating hole is opened on the bottom surface of inducer wheel hub, and the inwall of inducer mounting hole has been attacked internal thread; Described inducer blade is the curved surface lamellar body, and bi-side are the parabola that surface equation equates, the root of inducer blade is arranged on the outer wall of inducer wheel hub, and all inducer blades are along circumferentially being distributed on the inducer wheel hub;
Described wheel disc comprises integrated wheel disc wheel hub and a plurality of wheel disk blade, and the quantity of wheel disk blade equates with the quantity of inducer blade; The wheel disc wheel hub comprises coaxial setting, integrated inducer mounting portion and high speed shaft mounting portion; Described inducer mounting portion is cylindrical shape, its cross section is the T font, the part that external diameter is little is the inducer coupling shaft, the part that external diameter is large is inducer axially locating axle, inducer coupling shaft and inducer axially locating axle coaxially arrange, one-body molded, the outer wall of inducer coupling shaft has been attacked outside thread, and the length of inducer axially locating axle is less than the length in inducer axially locating hole; The top end face of inducer mounting portion offers the seal groove of ring, and the central shaft of inducer mounting portion is to offering the flow deflecting cone supported hole;
Described high speed shaft mounting portion integral body is the curved frustoconic shape of bus, offers vertically high speed shaft axial assist location hole and high speed shaft mounting hole; The high speed shaft mounting hole comprises three sections of coaxial setting, one end in first section high speed shaft mounting hole and the axial assist location of high speed shaft hole joins, the other end in the axial assist location of high speed shaft hole and an end of flow deflecting cone supported hole join, the other end of flow deflecting cone supported hole is opened on the end face of inducer mounting portion, and rear high speed shaft mounting hole is opened on the bottom surface of high speed shaft mounting portion; The aperture in the axial assist location of high speed shaft hole is greater than the aperture of flow deflecting cone supported hole and the aperture of high speed shaft mounting hole; The madial wall of high speed shaft mounting hole offers the keyway of long strip vertically;
Described wheel disk blade integral body is the plane lamellar body, and root is arranged on the outer wall of high speed shaft mounting portion, and the top end face is plane, and with the coplanar setting of top end face of high speed shaft mounting portion, sidewall is the curved surface shape; All wheel disk blades are along circumferentially being distributed on the high speed shaft mounting portion;
Described flow deflecting cone comprises conehead, flow deflecting cone back shaft and the high speed shaft coupling shaft of one-body molded and coaxial setting, and the flow deflecting cone back shaft is arranged between conehead and high speed shaft coupling shaft; The top of conehead is the curved circular cone of bus, and bottom is cylindrical; On the circumferential surface of high speed shaft coupling shaft, be provided with the high speed shaft connecting thread;
Described high speed shaft comprises high speed shaft installation shaft and the high speed shaft axially locating axle of one-body molded and coaxial setting; The high speed shaft installation shaft comprises three sections of coaxial setting, and the external diameter of first section high speed shaft installation shaft, stage casing high speed shaft installation shaft, rear high speed shaft installation shaft equates with the aperture of first section high speed shaft mounting hole, stage casing high speed shaft mounting hole, rear high speed shaft mounting hole respectively; The sidewall of high speed shaft installation shaft is provided with rectangular groove vertically, and the top of high speed shaft installation shaft offers vertically flow deflecting cone tapped hole is installed;
The inducer coupling shaft of described wheel disc is arranged in the inducer mounting hole of inducer, and inducer and wheel disc are threaded connection; The inducer axially locating axle of wheel disc is arranged in the inducer axially locating hole of inducer, and the bottom end face of inducer is arranged on the end, top of the high speed shaft mounting portion of wheel disc wheel hub, and the top end face of inducer and the top end of wheel disc arrange in the face of neat; Each inducer blade bottom of described inducer fits with the corresponding wheel disk blade top of wheel disc;
Described flow deflecting cone back shaft is arranged in the flow deflecting cone supported hole, and the top end face of the bottom end face of conehead and inducer and the top end of wheel disc arrange in the face of neat, are provided with seal ring in the seal groove of inducer; Described high speed shaft installation shaft is arranged in the high speed shaft mounting hole, and the axle journal end of high speed shaft axially locating axle is arranged on the bottom end face place of wheel disc; The high speed shaft coupling shaft is arranged on flow deflecting cone and installs in tapped hole, and flow deflecting cone is connected by the high speed shaft connecting thread with high speed shaft; The split type impeller inducer of centrifugal compressor is realized axial restraint by the bottom end face of the conehead of flow deflecting cone and the axle journal end face of high speed shaft axially locating axle; The rectangular groove aligned in position of the keyway of wheel disc and high speed shaft, insert metallic bond, realizes the circumferentially spacing of wheel disc and high speed shaft.
2. the split type impeller inducer assembly of a kind of centrifugal compressor according to claim 1, it is characterized in that: the aperture of described rear high speed shaft mounting hole is greater than the aperture of first section high speed shaft mounting hole, and is less than the aperture of stage casing high speed shaft mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310323728.3A CN103410774B (en) | 2013-07-26 | 2013-07-26 | Split type air guide impeller assembly of centrifugal compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310323728.3A CN103410774B (en) | 2013-07-26 | 2013-07-26 | Split type air guide impeller assembly of centrifugal compressor |
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| CN103410774A true CN103410774A (en) | 2013-11-27 |
| CN103410774B CN103410774B (en) | 2015-07-22 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782113A (en) * | 2016-05-04 | 2016-07-20 | 珠海格力电器股份有限公司 | Fan blade and air conditioner |
| CN110360131A (en) * | 2018-04-10 | 2019-10-22 | 南通大通宝富风机有限公司 | Vapour compression machine |
| CN111219361A (en) * | 2018-07-17 | 2020-06-02 | 赵浩浩 | Impeller structure for compressor or blower |
| CN112392548A (en) * | 2019-08-13 | 2021-02-23 | 江苏国富氢能技术装备有限公司 | Closed impeller for turbo expander |
| CN113265988A (en) * | 2021-05-27 | 2021-08-17 | 广东粤源工程咨询有限公司 | Porous hedging energy dissipation structure for hydraulic structure and implementation method |
| CN114087025A (en) * | 2021-11-18 | 2022-02-25 | 新乡航空工业(集团)有限公司 | Combined closed impeller with milling blades and impeller manufacturing method |
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| CN201747671U (en) * | 2010-05-19 | 2011-02-16 | 杭州振兴工业泵制造有限公司 | Impeller and shaft connection structure of turbine compressor |
| CN201934335U (en) * | 2010-12-29 | 2011-08-17 | 四川红华实业有限公司 | Stepless frequency conversion gas booster |
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2013
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| DE3104018A1 (en) * | 1980-02-08 | 1981-12-24 | Leonardo Arcugnano Vicenza Beltrame | Electrical compressor for acoustic warning apparatuses |
| CN2769561Y (en) * | 2004-12-29 | 2006-04-05 | 中国船舶重工集团公司第七一一研究所 | Single-stage high-speed centrifugal compressor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782113A (en) * | 2016-05-04 | 2016-07-20 | 珠海格力电器股份有限公司 | Fan blade and air conditioner |
| CN110360131A (en) * | 2018-04-10 | 2019-10-22 | 南通大通宝富风机有限公司 | Vapour compression machine |
| CN111219361A (en) * | 2018-07-17 | 2020-06-02 | 赵浩浩 | Impeller structure for compressor or blower |
| CN112392548A (en) * | 2019-08-13 | 2021-02-23 | 江苏国富氢能技术装备有限公司 | Closed impeller for turbo expander |
| CN112392548B (en) * | 2019-08-13 | 2024-05-07 | 江苏国富氢能技术装备股份有限公司 | Closed impeller for turbine expander |
| CN113265988A (en) * | 2021-05-27 | 2021-08-17 | 广东粤源工程咨询有限公司 | Porous hedging energy dissipation structure for hydraulic structure and implementation method |
| CN114087025A (en) * | 2021-11-18 | 2022-02-25 | 新乡航空工业(集团)有限公司 | Combined closed impeller with milling blades and impeller manufacturing method |
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| CN103410774B (en) | 2015-07-22 |
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