CN204992929U - Airflow generation device - Google Patents
Airflow generation device Download PDFInfo
- Publication number
- CN204992929U CN204992929U CN201520616242.3U CN201520616242U CN204992929U CN 204992929 U CN204992929 U CN 204992929U CN 201520616242 U CN201520616242 U CN 201520616242U CN 204992929 U CN204992929 U CN 204992929U
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- rotor
- motor
- air flow
- stator
- elastic component
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Abstract
The utility model provides an airflow generation device, including single phase motor, load coupling mechanism and impeller. The motor includes stator and permanent magnet rotor, load coupling mechanism includes the fixing base, the fixing base fixed connection arrive its synchronous revolution can be followed to the rotor of motor, fixed connection is to the connecting seat of impeller, the connecting seat has coupling portion, a connecting device, connecting device includes the elastic component, the both ends of elastic component are fixed respectively and are arrived fixing base and connecting seat, the elastic component encircles the drive shaft with coupling portion periphery, the internal diameter of elastic component is in thereby when being greater than the connecting seat rotational speed, the fixing base rotational speed reduces gradually to make coupling portion, fixing base coupling gradually are in the same place, and then make the rotational speed of connecting seat edges closer to or equals the rotational speed of fixing base. Implement the utility model discloses, can play cushioning effect, to avoid electrical starting failure for the great load of motor drive to prevent that the motor from damaging.
Description
[technical field]
The utility model relates to machine field, more specifically, relates to the air flow-producing device that a kind of monophase machine drives.
[background technology]
When motor drives the impeller operation of blower fan, water pump etc., if the starting load of blower fan water pump is too large, the moment that motor is starting easily causes starting unsuccessfully because not providing enough rotating torques, and therefore may damage motor.
When this motor adopts single-phase synchronous machine, more easily suffer above-mentioned problem.
Therefore, a kind of improved plan is needed badly.
[utility model content]
The purpose of this utility model is to provide a kind of air flow-producing device that can drive compared with heavy load.
For this reason, the utility model provides a kind of air flow-producing device, comprise monophase machine, load bindiny mechanism and impeller, it is characterized in that, described monophase machine comprise stator, can the p-m rotor that rotates of relative stator and position transducer for inductiopn rotor position, described load bindiny mechanism comprises holder, described holder be fixedly attached to described motor rotor and can with its synchronous rotary; Be fixedly attached to the Connection Block of impeller, described Connection Block has coupling part; Jockey, described jockey comprises elastic component, the two ends of described elastic component are respectively fixed to described holder and Connection Block, described elastic component is looped around described driving shaft and described coupling part periphery, the internal diameter of described elastic component reduce gradually when described holder rotating speed is greater than Connection Block rotating speed thus make described coupling part, holder is coupled gradually, and then the rotating speed of described Connection Block moved closer to or equals the rotating speed of described holder.
As a kind of preferred version, described monophase machine is single-phase permanent DC brushless motor or single-phase permanent-magnet synchronous motor.
As a kind of preferred version, also comprise the protective sleeve being installed to described elastic component periphery.
As a kind of preferred version, described elastic component is helical spring.
As a kind of preferred version, described monophase machine also comprises drive circuit, described stator comprises stator winding, described stator winding and an external ac power source are series between first, second node, described drive circuit comprises controllable bidirectional alternating-current switch and the AC-DC change-over circuit of described two-way exchange switch in parallel between first, second node described, described position transducer and ON-OFF control circuit, and when described controllable bidirectional alternating-current switch conducting, because first, second node described is shorted, no current flows through described AC-DC change-over circuit; Described ON-OFF control circuit is configured to the polarity information of rotor magnetic pole position information and the described external ac power source detected according to described position transducer, control described controllable bidirectional alternating-current switch to switch between conducting and cut-off state in a predefined manner, make described stator winding only drag described rotor along predetermined starting direction in the electric motor starting stage.
Described air flow-producing device can be that blower fan is if ventilating fan, smoke exhaust ventilator etc. or water pump are as draining pump for washing machine etc.
Implement the utility model, comparatively heavy load can be driven to play cushioning effect for motor, avoid electric motor starting failure, and prevent motor damage.
[accompanying drawing explanation]
Below in conjunction with Figure of description and embodiment, the utility model is described in further detail.
Fig. 1 is the assembling schematic diagram of the air flow-producing device that the utility model embodiment provides;
Figure 2 shows that the schematic diagram of the Connection Block of the load bindiny mechanism of air flow-producing device shown in Fig. 1;
Fig. 3 is the schematic diagram after the assembling of air flow-producing device shown in Fig. 1;
Fig. 4 to Fig. 6 shows the change of load bindiny mechanism in motor start-up procedure;
The assembling schematic diagram of the air flow-producing device that Fig. 7 provides for the utility model second embodiment;
The assembling schematic diagram of the air flow-producing device that Fig. 8 provides for the utility model the 3rd embodiment;
The assembling schematic diagram of the motor driving group air flow-producing device part that Fig. 9 provides for the utility model the 4th embodiment;
Figure 10 shows that a kind of impeller be applied in above-described embodiment;
Figure 11 shows that a kind of monophase machine be applied in above-described embodiment;
Figure 12 shows that the structured flowchart of the drive circuit being applied to the motor shown in Figure 11;
Figure 13 shows that the another kind of monophase machine be applied in above-described embodiment.
[embodiment]
With reference to figure 1, the load bindiny mechanism 50 that the air flow-producing device that the utility model first embodiment provides comprises monophase machine 30, impeller 40 and is connected between motor 30 and impeller 40, this motor 30 is operated by load bindiny mechanism 50 drives impeller 40.
Load bindiny mechanism 50 comprises driving shaft 51, holder 53, Connection Block 55 and jockey 59.Driving shaft 51 is connected to motor 30 driving by motor 30 rotor, and understandably, described driving shaft 51 can be the output shaft of motor itself or be connected to the external driving shaft of motor output shaft or rotor by shaft joint.In the present embodiment, holder 53 is fixedly attached to driving shaft 51 and can rotates with driving shaft 51, and understandably, holder 53 also can be fixedly attached to other positions of rotor.Connection Block 55 is fixedly attached to impeller 40.Jockey 59 is the frictional force also between control connection seat 55 and driving shaft 51 for connection fixing base 53 and Connection Block 55, dynamic load 40 can be with to rotate to make driving shaft 51 after rotating speed reaches certain value.In the present embodiment, described motor 30 is single-phase permanent-magnet synchronous motor or single-phase permanent DC brushless motor.
With reference to figure 2, some braces 57 that Connection Block 55 comprises annulus 56 and stretches out from annulus 56 side, brace 57 extends towards the direction of holder 53, there is between adjacent tabs gap 58, the existence in gap 58 allows brace 57 to curve inwardly, thus reduce the internal diameter in the space that this some connector 57 surrounds, preferably, the minimum diameter in the space that this some brace 57 surrounds is less than the external diameter of driving shaft 51.
With reference to figure 3, some braces 57 are looped around the periphery of driving shaft 51, and jockey 59 is nested in the periphery of brace 57.Jockey 59 comprises elastic component, is helical spring in the present embodiment, and helical spring two ends are respectively fixed to holder 53 and Connection Block 55, and helical spring is looped around the periphery of some braces 57.
Motor drive component enters the process of operating state (rotation) from inactive state, and the change of load bindiny mechanism is respectively as shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, and particularly, Fig. 3 illustrates the schematic diagram of motor drive component inactive state.When motor 30 drives driving shaft 51 to rotate, one end that jockey 59 is connected to holder 53 rotates thereupon, helical spring 59 is tightened gradually from one end of connection fixing base 53, thus brace 57 is shunk to the direction of driving shaft 51, some braces 57 shrink and make brace 57 contact with driving shaft 51 and have the frictional force increased gradually, along with brace 57 shrink more and more tighter, and the frictional force between driving shaft 51 can be increasing, when frictional force reaches enough large, Connection Block 55 rotates under the drive of this frictional force, thus load 40 is rotated together with Connection Block 55, as shown in Figure 4 and Figure 5.When the rotating speed of load 40 (or Connection Block 55) is identical with the rotating speed of driving shaft 51, jockey 59 will be stabilized in certain compressive state, as shown in Figure 6.
In order to increasing friction force, the inwall of brace 57 is curved surface and has coarse graininess projection, and in order to make brace 57 more easily restore to the original state when motor quits work, brace 57 has elasticity.
When being appreciated that this motor drive component becomes halted state from operating state (rotation), the change procedure of load bindiny mechanism will respectively as shown in Fig. 6, Fig. 5, Fig. 4 and Fig. 3.That is, when driving shaft 51 rotating speed declines or stops, load 40 can be rotated further under effect of inertia, cause relatively rotating between Connection Block 55 and holder 53, now, bolster 59 can unclamp gradually by Connection Block 55 end, and finally returns to state as shown in Figure 3.
With reference to figure 7, the difference of the motor drive component that the utility model second embodiment provides and the first embodiment is, adds the protective sleeve 61 being installed to jockey 59 periphery.When motor 30 gets back to out-of-work state from operating state, driving shaft stops operating gradually, load 40 together with Connection Block 55 because inertia can be rotated further, in this course, the elastic component of jockey 59 loosens from the state tightened, make brace 57 restore to the original state gradually thus depart from from driving shaft, no longer rotate by frictional force drives.If the inertia of load 40 is too large, elastic component is subject to excessive active force, causes the external diameter of elastic component also can continue to become large, easily causes damage to jockey 59.Therefore increase protective sleeve 61 to make it to fracture because of overtension with the subtend limiting elastic component external diameter.
When motor drives larger load, be not enough to be with dynamic load to solve electric motor starting initial stage output torque thus start failed problem, implementing the utility model can make load 40 relative drive shaft 51 skid at the electric motor starting initial stage, when motor output torque reaches certain value, motor is with dynamic load 40 to move by bindiny mechanism 50, thus makes motor more easily drive larger load and make self not damaged.And the motor drive component using the utility model to provide and load bindiny mechanism thereof, do not need the size increasing motor, thus decrease the power loss caused because of coil turn increase.
The assembling schematic diagram of the air flow-producing device that Fig. 8 provides for the utility model the 3rd embodiment.The difference of the present embodiment and previous embodiment is: eliminate Connection Block 55 in the present embodiment, and one end of helical spring 59 is connected to holder 53, and the other end is connected to load 40.When motor 30 works, driving shaft 51 drives holder 53 to rotate, one end that helical spring 59 is connected to holder 53 rotates thereupon, helical spring 59 is connected to one end of load 40, and owing to being subject to the resistance of load 40, geo-stationary is motionless, therefore helical spring 59 is reversed thus storage power, and now driving shaft 51 relative load 40 skids; When motor 30 work energy that certain hour makes helical spring 59 store be enough to overcome the resistance from load time, helical spring 59 will be with dynamic load 40 together with driving shaft 51 synchronous rotary.
The assembling schematic diagram of the air flow-producing device that Fig. 9 provides for the utility model the 4th embodiment.In the present embodiment, Connection Block 55 comprises coupling part 56 that is shaft-like or tubular, and coupling part 56 is separated and co-axially align with driving shaft 51.Elastic component 59 is helical spring, and helical spring is spirally around coupling part 56, driving shaft 51.The transformable tube connector 63 of internal diameter around coupling part 56 and driving shaft 51 and by elastic component 59 around, for lock ring coupling part 56 and driving shaft 51 when elastic component 59 internal diameter reduces.
In the present embodiment, the cross section of tube connector 63 is C shape, that is, pipe shaft has the seam 64 extended vertically so that tube connector 63 can under the effect of elastic component 59 lock ring coupling part 56 and driving shaft 51.Preferably, tube connector 63 has elasticity, can restore to the original state after elastic component 59 removes external force.
Figure 10 shows that a kind of impeller be applied in above-described embodiment, described impeller 40 is preferably one direction rotary blade, described one direction rotary blade comprises the arc flabellum 42 that some (clockwise direction or counter clockwise direction) in the same direction extends, adopt linear pattern flabellum relative to bidirectional rotary impeller, adopt flexure type flabellum can increase the efficiency of impeller.Certainly, described impeller 40 also can adopt linear pattern flabellum.
Figure 11 shows that a kind of single-phase permanent brushless motor 30 be applied in above-described embodiment, this motor is inner-rotor-type.Described motor 30 comprises stator 31 and rotor 32, stator 31 comprises by permeability magnetic material as the iron stator core 33 made and the winding 34 be set around on magnetic core 33, rotor 32 comprises rotating shaft 35 and permanent magnet poles 36, permanent magnet poles 36 outer surface is relative with stator core 33 and form air gap between, preferably, described air gap is basic uniform air gap, namely permanent magnet poles 36 outer surface is coaxial with the inner surface of stator core 33, the inner surface of stator core 33 establishes groove 37, groove 37 be arranged so that rotor 32 is parked in the position (namely the pole axis of p-m rotor offsets an angle relative to the pole axis of stator) of departing from dead point at the cold situation lower rotor part 32 of stator winding 34, preferably, groove 37 number is more than or equal to rotor magnetic pole number.Described motor also comprises position induction device 74 as Hall element, photoelectric sensor etc., and position induction device 74 is for the position of inductiopn rotor.
Figure 12 illustrates the structured flowchart of synchronous machine drives circuit of the present utility model.In drive circuit 70, stator winding 34 and AC power 71 are series between two node A, B.AC power 71 can be preferably mains ac power supply, has the fixed frequency of such as 50 hertz or 60 hertz, and current/voltage can be such as 110 volts, 220 volts, 230 volts etc.Controllable bidirectional alternating-current switch 72 is parallel between two node A, B with the stator winding 34 of connecting and AC power 71.Controllable bidirectional alternating-current switch 72 is preferably three terminal bidirectional thyristor (TRIAC), and two anode connects two node A and B respectively.Be appreciated that controllable bidirectional alternating-current switch 72 also can such as be realized by two thyristors of reverse parallel connection, and corresponding control circuit is set to control this two thyristors according to predetermined way.AC-DC change-over circuit 73 and switch 71 are parallel between two node A, B.Alternating current between two node A, B is converted to low-voltage DC by AC-DC change-over circuit 73.The low-voltage DC that position transducer 74 can be exported by AC-DC change-over circuit 73 is powered, and for detecting the position of magnetic pole of the p-m rotor 32 of synchronous machine 30, and exports corresponding signal.ON-OFF control circuit 75 is connected with AC-DC change-over circuit 73, position transducer 74 and controllable bidirectional alternating-current switch 72, be configured to the polarity information according to the rotor magnetic pole position information of position transducer 74 detection and the AC power 24 from AC-DC change-over circuit 73 acquisition, control controllable bidirectional alternating-current switch 71 to switch between conducting and cut-off state in a predefined manner, make stator winding 34 only drag rotor 32 along aforesaid fixing starting direction in the electric motor starting stage and rotate.In the utility model embodiment, when 72 conducting of controllable bidirectional alternating-current switch, two nodes A, B are shorted, and AC-DC change-over circuit 73 is no longer power consumption because no current flows through, therefore, it is possible to improve efficiency greatly.
Figure 13 shows that the motor 30 of the another kind of form be applied in above-described embodiment, this motor 30 is external-rotor-type, namely rotor is positioned at stator peripheral, non-uniform gap is formed between rotor permanent magnetic pole and stator core, preferably, symmetrical and its radial width reduces gradually from pole center toward two of magnetic pole circumference ends about the center line of this magnetic pole for the air gap at each magnetic pole place corresponding, form notch between the crown 312 of adjacent two stator tooths, described notch width is in the circumferential less than or equal to 5 times of the smallest radial width of described air gap.When rotor is positioned at initial position and stator winding no power, the intersection of adjacent two magnetic poles of the radially respective rotor of the crown 312 of stator tooth, like this, rotor can be positioned in the position of departing from dead point.
For the person of ordinary skill of the art, without departing from the concept of the premise utility, some distortion and improvement can also be made, also can be external-rotor-type if motor can be inner-rotor-type, air gap between rotor can evenly also can be non-homogeneous, the material of permanent magnet poles can be rare earth material also can be the other materials types such as ferrite, during employing internal rotor form, permanent magnet poles can be directly fixed to the rotating shaft of rotor, also can be that rotor magnetic core is first fixed to rotating shaft, permanent magnet poles is fixed to the outer surface of rotor magnetic core and magnetic pole surface-mount type again or inserts in rotor magnetic core that namely magnetic pole is built-in, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (12)
1. an air flow-producing device, comprises monophase machine, load bindiny mechanism and impeller, it is characterized in that, described monophase machine comprise stator, can relative stator rotate p-m rotor, described load bindiny mechanism comprises:
Holder (53), described holder be fixedly attached to described motor rotor and can with its synchronous rotary;
Jockey (50), described jockey comprises elastic component (59), the two ends of described elastic component are fixedly attached to described holder (53) and impeller (40) respectively, after motor starts along predetermined direction, when the energy that elastic component stores reaches certain value, dragging impeller rotates along this predetermined direction by the other end of elastic component.
2. air flow-producing device as claimed in claim 1, it is characterized in that, described load bindiny mechanism comprises and is connected to motor and the driving shaft (51) driven by rotor and be fixedly attached to the Connection Block (55) of impeller (40), described holder (53) is fixedly attached to driving shaft (51), described Connection Block has coupling part, described elastic component is looped around described driving shaft (51) and described coupling part periphery, the internal diameter of described elastic component reduces gradually when described holder (53) rotating speed is greater than Connection Block (55) rotating speed thus makes described coupling part, holder is coupled gradually, and then the rotating speed of described Connection Block is moved closer to or equals the rotating speed of described holder.
3. air flow-producing device as claimed in claim 1, it is characterized in that, described monophase machine is single-phase permanent DC brushless motor or single-phase permanent-magnet synchronous motor.
4. air flow-producing device as claimed in claim 1, is characterized in that, also comprise the protective sleeve being installed to described elastic component periphery.
5. air flow-producing device as claimed in claim 1, it is characterized in that, described elastic component is helical spring.
6. air flow-producing device as claimed in claim 1, it is characterized in that, described impeller is one direction rotary blade, comprises some arc flabellums extended in the same direction.
7. the air flow-producing device as described in any one of claim 1 to 6, it is characterized in that, described monophase machine also comprises drive circuit, described stator comprises stator winding, described stator winding and an external ac power source are series at first, between Section Point, described drive circuit comprises controllable bidirectional alternating-current switch, with described two-way exchange switch in parallel in described first, AC-DC change-over circuit between Section Point, position transducer and ON-OFF control circuit, described AC-DC change-over circuit when described controllable bidirectional alternating-current switch conducting due to described first, Section Point is shorted and no current flows through, described ON-OFF control circuit is configured to the polarity information of rotor magnetic pole position information and the described external ac power source detected according to described position transducer, control described controllable bidirectional alternating-current switch to switch between conducting and cut-off state in a predefined manner, make described stator winding only drag described rotor along predetermined starting direction in the electric motor starting stage.
8. air flow-producing device as claimed in claim 1, it is characterized in that, described rotor comprises some permanent magnet poles, described stator comprises stator core and is set around the winding on stator core, described stator core comprises some stator tooths, each stator tooth comprises the pole-face towards permanent-magnet pole, described pole-face and rotor coaxial.
9. air flow-producing device as claimed in claim 1, it is characterized in that, described motor is external-rotor-type, described rotor comprises some permanent magnet poles, described stator comprises stator core and is set around the winding on stator core, described stator core comprises some stator tooths for winding winding, when rotor is positioned at initial position, and the intersection of adjacent two magnetic poles of stator tooth respective rotor.
10. air flow-producing device as claimed in claim 9, it is characterized in that, non-homogeneous air gap is formed between described permanent magnet poles and stator core, the air gap at each magnetic pole place corresponding is symmetrical about the center line of this magnetic pole, and the radial width of the air gap at each magnetic pole place corresponding reduces gradually from pole center toward two of magnetic pole circumference ends.
11. air flow-producing devices as claimed in claim 1, it is characterized in that, described air flow-producing device is blower fan.
12. air flow-producing devices as claimed in claim 1, it is characterized in that, described air flow-producing device is water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520616242.3U CN204992929U (en) | 2015-08-14 | 2015-08-14 | Airflow generation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520616242.3U CN204992929U (en) | 2015-08-14 | 2015-08-14 | Airflow generation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204992929U true CN204992929U (en) | 2016-01-20 |
Family
ID=55127253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520616242.3U Expired - Fee Related CN204992929U (en) | 2015-08-14 | 2015-08-14 | Airflow generation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204992929U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3223391A1 (en) * | 2016-03-24 | 2017-09-27 | Johnson Electric S.A. | Cooling fan and air-cooled refrigerator comprising same |
| CN109672310A (en) * | 2019-02-01 | 2019-04-23 | 珠海市绿田机械有限公司 | Three-phase ac synchronous motor and electrical equipment |
-
2015
- 2015-08-14 CN CN201520616242.3U patent/CN204992929U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3223391A1 (en) * | 2016-03-24 | 2017-09-27 | Johnson Electric S.A. | Cooling fan and air-cooled refrigerator comprising same |
| CN107231062A (en) * | 2016-03-24 | 2017-10-03 | 德昌电机(深圳)有限公司 | The wind cooling refrigerator of cooling fan and the application cooling fan |
| CN109672310A (en) * | 2019-02-01 | 2019-04-23 | 珠海市绿田机械有限公司 | Three-phase ac synchronous motor and electrical equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20210814 |
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| CF01 | Termination of patent right due to non-payment of annual fee |