CN105485043A - Draught fan hub for adjusting angle between blades in full-automatic mode along with change of environment temperature - Google Patents
Draught fan hub for adjusting angle between blades in full-automatic mode along with change of environment temperature Download PDFInfo
- Publication number
- CN105485043A CN105485043A CN201610066669.XA CN201610066669A CN105485043A CN 105485043 A CN105485043 A CN 105485043A CN 201610066669 A CN201610066669 A CN 201610066669A CN 105485043 A CN105485043 A CN 105485043A
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- China
- Prior art keywords
- hub
- storehouse
- connecting rod
- bearing
- ambient temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/303—Temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a draught fan hub for adjusting the angle between blades in a full-automatic mode along with the change of environment temperature. An integral bearing seat is disassembled into several units with the same structure, main parts are exposed, and the purposes that each unit can be independently mounted and dismounted and operating space is increased are achieved, a temperature control adjusting assembly adjusts the angle between the blades in real time by sensing the operating environment temperature of a draught fan based on the liquid thermal expansion and cold shrinkage principle, the working efficiency of the draught fan is improved, maintenance is avoided, no other auxiliary equipment is needed, energy consumption is reduced, mounting cost is low, no operating cost investment is needed, and the service life is long.
Description
Technical field
The present invention relates to fan blade hub technology field, be specifically related to a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle.
Background technique
One of critical piece of blower fan is impeller, and impeller is made up of wheel hub and the blade be fixed on wheel hub.Existing fan blade wheel hub, body seal is in a bearing support, although this mode compact structure, beautiful shape, installation, dismounting bother bothersome very much, and working efficiency is lower.And angle of fan leaves regulative mode is mainly divided into: manual tune, synchronization regulation, pneumatic automatic adjustment, totally three kinds, wherein manual tune and synchronization regulation need labor costs's long period to adjust, and blower fan must be out of service, lost labor, adjustment can waste energy again not in time.Pneumatic autohub is converted to pneumatic signal by the electronic signal of electronic sensor to pass to Pneumatic actuator, in real time angle of fan leaves is regulated, but problem be supplementary equipment and operating cost too high, the continual high-pressure air guarantee that provides is needed normally to run, and complex structure rate of fault is higher, so be never used widely.How to make fan blade wheel hub can not by the automatic adjusting vane angle of external equipment, can be easy to again to install, dismounting, be one of problem of current the sector research.
Summary of the invention
Technical problem to be solved by this invention is to provide one and is convenient to installation, maintenance, dismounting, automatically can regulate a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle of angle of fan leaves.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
With an axial fan hub for variation of ambient temperature full-automatic regulation blade angle, it is characterized in that: comprise fan blade temperature control angle demodulator assembly, hub unit, adjustable lever and blower fan main shaft; Described fan blade temperature control angle demodulator assembly is located at above hub unit, is connected with the adjustable lever be located in hub unit; Described adjustable lever bottom penetrates in blower fan main shaft, and lock onto blower fan main shaft; Described fan blade temperature control angle demodulator assembly changes the method driven wheel hub assembly synchronization regulation of volume with ambient temperature change according to built-in swelling liquid.
Further technological scheme is: described fan blade temperature control angle demodulator assembly comprises expanding liquid storehouse, perform bar and excess of stroke regulator, expanding liquid storehouse is divided airtight two-layer up and down, upper strata is provided with swelling liquid, being provided with airtight execution storehouse in lower floor is fixed on the sealing cover of lower end, through hole is provided with between upper strata, expanding liquid storehouse and execution storehouse, be provided with piston type execution bar in execution storehouse and become the formal lower slider of oil cylinder in execution storehouse, perform bar lower end and connect adjustable lever top, described excess of stroke regulator is located at upper end, expanding liquid storehouse and is communicated with it, be provided with one-way valve between the two, the modulating valve being provided with down piston type in described excess of stroke regulator is connected with excess of stroke regulator threaded upper ends, Returnning spring is provided with between upper-end surface in modulating valve and excess of stroke regulator, the excess of stroke return pipe with one-way valve is provided with between execution storehouse and excess of stroke regulator lower end side, described execution bar upper-end surface and modulating valve lower end surface are all identical with the cross section of respective place cavity.
Further technological scheme is: when described execution bar moves to lowest order, and excess of stroke return pipe communicates with the execution storehouse inner chamber performing bar upper end.
Further technological scheme is: outer ring, described execution bar upper end is provided with seal ring.
Further technological scheme is: described adjustable lever top is connected with execution bar lower end reverse thread.
Further technological scheme is: upper strata, described expanding liquid storehouse swelling liquid is silicone oil.
Further technological scheme is: described hub unit comprises the support plate be located on blower fan main shaft, is provided with hub seat below support plate, is provided with tapered sleeve in hub seat, and center, support plate upper-end surface is provided with guide holder; Described support plate upper-end surface is laid with 4-6 bearing unit, is provided with pitch change axes in bearing unit, and pitch change axes outboard end is provided with oar cover, and pitch change axes the other end connecting rod connects land, and land connects the lower end sealing cover of lower end, expanding liquid storehouse.
Further technological scheme is: described connecting rod comprises offset connecting rod, second connecting rod and third connecting rod, and offset connecting rod bolt connects second connecting rod, second connecting rod pinned connection third connecting rod, and third connecting rod connects land.
Further technological scheme is: described bearing unit comprises bearing support, bearing, bearing (ball) cover, and described bearing support is located on pallet, and bearing support is provided with bearing, and bearing two ends are provided with bearing (ball) cover, is provided with pitch change axes in described bearing.
Further technological scheme is: described adjustable lever lower end is provided with lower threaded cap, and lower threaded cap screws in adjustable lever and is tightened by bolts in blower fan main shaft, and the helical thread portion of adjustable lever is provided with locking nut.
The beneficial effect adopting technique scheme to produce is:
The present invention resolves into the unit of several same structure the bearing support of entirety, makes outside main parts size is exposed to, reaches each unit and can install alone, dismantle, increase the object of operating space, temperature control adjusting part, by perception fan operation ambient temperature, utilizes liquid rising-heat contracting-cold principle, real-time adjusting vane angle, thus reach raising blower fan working efficiency, non-maintaining, without other supplementary equipment, reduce energy consumption, installation cost is low, drops into, long service life without the need to operating cost.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is main TV structure schematic diagram of the present invention;
Fig. 2 is plan structure schematic diagram of the present invention;
Fig. 3 is B-B cross-sectional view in Fig. 2;
Fig. 4 be in Fig. 3 A to part-structure schematic diagram.
Wherein: 1-adjustable lever, 2-blower fan main shaft, threaded cap under 3-, 4-tapered sleeve, 5-hub seat, 6-support plate, 7-guide holder, 8-bearing support, 9-pitch change axes, 10-bearing, 11-bearing (ball) cover, 12-oar cover, 13-offset connecting rod, 14-second connecting rod, 15-third connecting rod, 16-land, 17-expanding liquid storehouse, 18-performs bar, 19-performs storehouse, 20-excess of stroke regulator, 21-modulating valve, 22-Returnning spring, 23-excess of stroke return pipe, 24-one-way valve, 25-lower end sealing cover, 26-locking nut.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
As Figure 1-3, a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle, comprises fan blade temperature control angle demodulator assembly, hub unit, adjustable lever 1 and blower fan main shaft 2; Described fan blade temperature control angle demodulator assembly is located at above hub unit, is connected with the adjustable lever 1 be located in hub unit; Described adjustable lever 1 bottom penetrates in blower fan main shaft 2, and lock onto blower fan main shaft 2; Described fan blade temperature control angle demodulator assembly changes the method driven wheel hub assembly synchronization regulation of volume with ambient temperature change according to built-in swelling liquid.
Preferred further: described fan blade temperature control angle demodulator assembly comprises expanding liquid storehouse 17, perform bar 18 and excess of stroke regulator 20, airtight two-layer up and down in 17 points, expanding liquid storehouse, upper strata is provided with swelling liquid, being provided with airtight execution storehouse 19 in lower floor is fixed on lower end sealing cover 25, through hole is provided with between upper strata, expanding liquid storehouse 17 and execution storehouse 19, perform in storehouse 19 and be provided with piston type execution bar 18 formal lower slider of one-tenth oil cylinder in execution storehouse 19, perform bar 18 lower end and connect adjustable lever 1 top, described excess of stroke regulator 20 is located at upper end, expanding liquid storehouse 17 and is communicated with it, be provided with one-way valve 24 between the two, the modulating valve 21 being provided with down piston type in described excess of stroke regulator 20 is connected with excess of stroke regulator 20 threaded upper ends, Returnning spring 22 is provided with between upper-end surface in modulating valve 21 and excess of stroke regulator 20, the excess of stroke return pipe 23 with one-way valve 24 is provided with between execution storehouse 19 and excess of stroke regulator 20 lower end side, described execution bar 18 upper-end surface and modulating valve 21 lower end surface are all identical with the cross section of respective place cavity.
Preferred further: described adjustable lever 1 top is connected with execution bar 18 lower end reverse thread.
Preferred further: described hub unit comprises the support plate 6 be located on blower fan main shaft 2, is provided with hub seat 5 below support plate 6, is provided with tapered sleeve 4 in hub seat 5, and center, support plate 6 upper-end surface is provided with guide holder 7; Described support plate 6 upper-end surface is laid with 4-6 bearing unit, is provided with pitch change axes 9 in bearing unit, and pitch change axes 9 outboard end is provided with oar cover 12, and pitch change axes 9 the other end connecting rod connects land 16, and land 16 connects the lower end sealing cover 25 of lower end, expanding liquid storehouse 17.
As shown in Figure 4, described connecting rod comprises offset connecting rod 13, second connecting rod 14 and third connecting rod 15, and offset connecting rod 13 bolt connects second connecting rod 14, and second connecting rod 14 pinned connection third connecting rod 15, third connecting rod 15 connects land 16.
Preferred further: described bearing unit comprises bearing support 8, bearing 10, bearing (ball) cover 11, and described bearing support 8 is located on pallet 6, and bearing support 8 is provided with bearing 10, and bearing 10 two ends are provided with bearing (ball) cover 11, is provided with pitch change axes 9 in described bearing 10.
Preferred further: described adjustable lever 1 lower end is provided with lower threaded cap 3, and lower threaded cap 3 screws in adjustable lever 1 and is tightened by bolts in blower fan main shaft 2, and the helical thread portion of adjustable lever 1 is provided with locking nut 26.
For temperature control adjusting part, when described execution bar 18 moves to lowest order, excess of stroke return pipe 23 communicates with execution storehouse 19 inner chamber performing bar 18 upper end, the volume that described execution bar 18 can vary with temperature according to swelling liquid and change moves up and down in execution storehouse 19, during to ensure temperature height, swelling liquid expands and can enter excess of stroke regulator 20, and upper strata, described expanding liquid storehouse 17 swelling liquid is silicone oil.Outer ring, described execution bar 18 upper end is provided with seal ring, becomes performing storehouse 19 one moves up and down the variable-volume obtained confined space by performing bar 18.
The perception of liquid variation of ambient temperature to external world in expanding liquid storehouse 17, moves up and down to execution bar 18, thus drives adjustable lever 1 to move, and regulates.When ambient temperature height, blower fan needs to provide raising air quantity with satisfied cooling demand, now in expanding liquid storehouse 17, liquid raises and volumetric expansion with ambient temperature, perform storehouse 19 to communicate with upper strata, expanding liquid storehouse 17, thus execution bar 18 moves down in promotion execution storehouse 19 thereupon, drive blower fan synchronization regulation wheel hub, blade angle increases thereupon, improves air quantity.Otherwise when ambient temperature reduces, perform bar 18 upwards rollback, angle of fan leaves reduces, and reduces energy consumption.When temperature constantly rises, when exceeding execution bar 18 regulation range, when execution bar 18 is forced into low level, expanding liquid enters excess of stroke return pipe 23, is temporarily stored in excess of stroke regulator 20.When temperature reduction, expanding liquid is got back in expanding liquid storehouse 17 under the effect of Returnning spring 22, can ensure blower fan oepration at full load in fixing high temperature range.
The design of one-way valve 24, flows to controlled after ensure that expansion of liquids, avoid unnecessary loss of liquid, ensures that execution architecture is normally back and forth run.The design of modulating valve 21, ensure that blower fan stroke and original state adjustable, ensure that controlling device can adapt to the working environment of various complexity and different temperature-control range.By turn modulating valve 21, the size of excess of stroke regulator 20 internal volume can be changed, when needs provide temperature controlling range, modulating valve 21 be screwed out, obtain larger allowance for expansion, otherwise modulating valve 21 is screwed in reduction temperature-control range and stroke.
The present invention resolves into the unit of several same structure the bearing support of entirety, makes outside main parts size is exposed to, reaches each unit and can install alone, dismantle, increase the object of operating space, temperature control adjusting part, by perception fan operation ambient temperature, utilizes liquid rising-heat contracting-cold principle, real-time adjusting vane angle, thus reach raising blower fan working efficiency, non-maintaining, without other supplementary equipment, reduce energy consumption, installation cost is low, drops into, long service life without the need to operating cost.
Claims (10)
1. with an axial fan hub for variation of ambient temperature full-automatic regulation blade angle, it is characterized in that: comprise fan blade temperature control angle demodulator assembly, hub unit, adjustable lever (1) and blower fan main shaft (2); Described fan blade temperature control angle demodulator assembly is located at above hub unit, is connected with the adjustable lever be located in hub unit (1); Described adjustable lever (1) bottom penetrates in blower fan main shaft (2), and lock onto blower fan main shaft (2); Described fan blade temperature control angle demodulator assembly changes the method driven wheel hub assembly synchronization regulation of volume with ambient temperature change according to built-in swelling liquid.
2. a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle according to claim 1, it is characterized in that: described fan blade temperature control angle demodulator assembly comprises expanding liquid storehouse (17), perform bar (18) and excess of stroke regulator (20), point airtight two-layer up and down in expanding liquid storehouse (17), upper strata is provided with swelling liquid, being provided with airtight execution storehouse (19) in lower floor is fixed on lower end sealing cover (25), through hole is provided with between (17) upper strata, expanding liquid storehouse and execution storehouse (19), perform in storehouse (19) and be provided with piston type execution bar (18) formal lower slider of one-tenth oil cylinder in execution storehouse (19), perform bar (18) lower end and connect adjustable lever (1) top, described excess of stroke regulator (20) is located at expanding liquid storehouse (17) upper end and is communicated with it, be provided with one-way valve (24) between the two, the modulating valve (21) being provided with down piston type in described excess of stroke regulator (20) is connected with excess of stroke regulator (20) threaded upper ends, Returnning spring (22) is provided with between modulating valve (21) and excess of stroke regulator (20) interior upper-end surface, the excess of stroke return pipe (23) with one-way valve (24) is provided with between execution storehouse (19) and excess of stroke regulator (20) lower end side, described execution bar (18) upper-end surface is all identical with the cross section of respective place cavity with modulating valve (21) lower end surface.
3. a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle according to claim 2, it is characterized in that: when described execution bar (18) moves to lowest order, excess of stroke return pipe (23) communicates with execution storehouse (19) inner chamber performing bar (18) upper end.
4. a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle according to claim 2, is characterized in that: described execution bar (18) outer ring, upper end is provided with seal ring.
5. a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle according to claim 2, is characterized in that: described adjustable lever (1) top is connected with execution bar (18) lower end reverse thread.
6., according to the arbitrary described a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle of claim 2 ~ 5, it is characterized in that: described expanding liquid storehouse (17) upper strata swelling liquid is silicone oil.
7. a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle according to claim 1 and 2, it is characterized in that: described hub unit comprises the support plate (6) be located on blower fan main shaft (2), support plate (6) below is provided with hub seat (5), be provided with tapered sleeve (4) in hub seat (5), support plate (6) center, upper-end surface is provided with guide holder (7); Described support plate (6) upper-end surface is laid with 4-6 bearing unit, pitch change axes (9) is provided with in bearing unit, pitch change axes (9) outboard end is provided with oar cover (12), pitch change axes (9) the other end connecting rod connects land (16), and land (16) connects the lower end sealing cover (25) of expanding liquid storehouse (17) lower end.
8. a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle according to claim 7, it is characterized in that: described connecting rod comprises offset connecting rod (13), second connecting rod (14) and third connecting rod (15), offset connecting rod (13) bolt connects second connecting rod (14), second connecting rod (14) pinned connection third connecting rod (15), third connecting rod (15) connects land (16).
9. a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle according to claim 7 or 8, it is characterized in that: described bearing unit comprises bearing support (8), bearing (10), bearing (ball) cover (11), described bearing support (8) is located on pallet (6), bearing support (8) is provided with bearing (10), bearing (10) two ends are provided with bearing (ball) cover (11), are provided with pitch change axes (9) in described bearing (10).
10. a kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle according to claim 1, it is characterized in that: described adjustable lever (1) lower end is provided with lower threaded cap (3), lower threaded cap (3) screws in adjustable lever (1) and is tightened by bolts in blower fan main shaft (2), and the helical thread portion of adjustable lever (1) is provided with locking nut (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610066669.XA CN105485043B (en) | 2016-02-01 | 2016-02-01 | A kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610066669.XA CN105485043B (en) | 2016-02-01 | 2016-02-01 | A kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105485043A true CN105485043A (en) | 2016-04-13 |
| CN105485043B CN105485043B (en) | 2017-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610066669.XA Expired - Fee Related CN105485043B (en) | 2016-02-01 | 2016-02-01 | A kind of axial fan hub with variation of ambient temperature full-automatic regulation blade angle |
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| Country | Link |
|---|---|
| CN (1) | CN105485043B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115021494A (en) * | 2022-05-25 | 2022-09-06 | 大庆市华禹石油机械制造有限公司 | Energy-saving AC asynchronous motor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2440519A (en) * | 1945-06-06 | 1948-04-27 | Mooney Edward | Motor fan blade control |
| DE960576C (en) * | 1953-12-08 | 1957-03-21 | Voith Gmbh J M | Fan or pump with delivery rate control influenced by the mean delivery temperature |
| JP2008163880A (en) * | 2006-12-28 | 2008-07-17 | Toyota Industries Corp | Centrifugal compressor |
| WO2013034656A1 (en) * | 2011-09-09 | 2013-03-14 | Nuovo Pignone S.P.A. | Actuator sealing system and method |
| CN103511083A (en) * | 2012-06-25 | 2014-01-15 | 通用电气公司 | Systems and methods to control flow in a rotor wheel |
| CN205383097U (en) * | 2016-02-01 | 2016-07-13 | 石家庄红叶风机有限公司 | Blower fan wheel hub along with full automatically regulated paddle angle of changes in ambient temperature |
-
2016
- 2016-02-01 CN CN201610066669.XA patent/CN105485043B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2440519A (en) * | 1945-06-06 | 1948-04-27 | Mooney Edward | Motor fan blade control |
| DE960576C (en) * | 1953-12-08 | 1957-03-21 | Voith Gmbh J M | Fan or pump with delivery rate control influenced by the mean delivery temperature |
| JP2008163880A (en) * | 2006-12-28 | 2008-07-17 | Toyota Industries Corp | Centrifugal compressor |
| WO2013034656A1 (en) * | 2011-09-09 | 2013-03-14 | Nuovo Pignone S.P.A. | Actuator sealing system and method |
| CN103511083A (en) * | 2012-06-25 | 2014-01-15 | 通用电气公司 | Systems and methods to control flow in a rotor wheel |
| CN205383097U (en) * | 2016-02-01 | 2016-07-13 | 石家庄红叶风机有限公司 | Blower fan wheel hub along with full automatically regulated paddle angle of changes in ambient temperature |
Non-Patent Citations (1)
| Title |
|---|
| 张建卓等: "自调角冷却风机叶片与驱动装置受力分析", 《机械设计与研究》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115021494A (en) * | 2022-05-25 | 2022-09-06 | 大庆市华禹石油机械制造有限公司 | Energy-saving AC asynchronous motor |
| CN115021494B (en) * | 2022-05-25 | 2022-11-25 | 大庆市华禹石油机械制造有限公司 | Energy-saving AC asynchronous motor |
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| Publication number | Publication date |
|---|---|
| CN105485043B (en) | 2017-07-28 |
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