CN108183565A - Cooling tower fan DC brushless motor - Google Patents
Cooling tower fan DC brushless motor Download PDFInfo
- Publication number
- CN108183565A CN108183565A CN201810021032.8A CN201810021032A CN108183565A CN 108183565 A CN108183565 A CN 108183565A CN 201810021032 A CN201810021032 A CN 201810021032A CN 108183565 A CN108183565 A CN 108183565A
- Authority
- CN
- China
- Prior art keywords
- cooling tower
- fan
- end cover
- brushless motor
- bottom end
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1735—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at only one end of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a kind of cooling tower fan DC brushless motors, including housing, rotor and the stator being laminated by several iron cores, the iron core is integrally formed, it which is provided with several fan grooves, interval width size between two neighboring fan groove is more than 5% with the stator diameter dimension scale, less than 9%.It is an advantage of the invention that：Simple in structure, without speed change, overall weight is light, has higher operational efficiency and high performance-price ratio, and it is easy to safeguard, safe and reliable.It is an advantage of the invention that：Simple in structure, without speed change, overall weight is light, has higher operational efficiency and high performance-price ratio, and it is easy to safeguard, safe and reliable.This cooling tower fan DC brushless motor can set morning, noon, late three kinds of different rotating speeds according to the requirement of client, can also be according to the leaving water temperature of cooling tower, the rotating speed of adjust automatically motor.
Description
Technical field
The present invention relates to Heating,Ventilating and Air Conditioning technical field used for cooling tower, more particularly, to cooling tower fan brush DC electricity
Machine.
Background technology
At present, the cooling fan system of the heat dissipation equipment cooling tower of Heating,Ventilating and Air Conditioning cooling water system, as shown in fig. 1, is adopted
With ac motor 1 by way of 6 driving fan 5 of belt, wherein being vertically arranged reduction box 4 on stent 3, fan 5 is set
On reduction box 4, the shaft of alternating current generator 1 is mounted on downward on stent 3, and drives driving wheel 2, and driving wheel 2 passes through skin
Band 6 drives reduction box 4, and the purpose of the rotation of driving fan 5 is realized by reduction box 4.
Generally between 200-350r/min, the rotating speed of alternating current generator usually exists the fan service requirement rotating speed of cooling tower
Between 720-1440r/min, it is therefore desirable to it could be run by way of belt transmission deceleration using alternating current generator driving fan,
Reach requirement.So, it is necessary to which the necessary equipments such as driving wheel, reduction box are set, and overall weight is larger, the volume of occupancy
More, the structure of entire cooling tower will consider to meet the weight of motor and speed reducer structure and targetedly reinforced, so as to
Increase the cost of cooling tower.And since stress is big, running environment is in humid tropical condition, the service life of belt compared with
It is short, frequent maintenance and replacement are needed, transmission efficiency is not also high.If using gearbox speed reduction mechanism, weight of equipment is equally existed
The shortcomings that big and maintaining is frequent.
Alternating current generator can realize the adjusting of rotating speed by increasing frequency converter, but restricted with alternating current characteristic, pass
Efficiency of movement is not high, the high energy consumption of long-time service.And the energy consumption of DC brushless motor is small, transmission efficiency, but its rotating speed is relatively
Height can not realize that the slow-speed of revolution of 200-350r/min adjusts requirement by frequency conversion, use in cooling tower fan system by
Limitation.
Invention content
The object of the present invention is to provide a kind of cooling tower fan DC brushless motors, can realize that the slow-speed of revolution is run, and
With higher operational efficiency and cost performance, easy to maintain, service life is long.
The present invention technical solution be：A kind of cooling tower fan DC brushless motor, including housing, rotor and by
The stator that several iron cores are laminated, the iron core are integrally formed, and which is provided with several fan grooves, two neighboring sector
Interval width size between slot is more than 5% with the stator diameter dimension scale, less than 9%.
By setting the structure of stator core, the form parameter of fan groove is set, controls the interval between two fan grooves wide
Degree and stator diameter dimension scale range, so as to while the slow-speed of revolution is met, improve efficiency as far as possible, meet driving cooling tower
Large torque needed for fan, the requirement of the slow-speed of revolution.Stator core is integrally formed, simple in structure, loss is small, easy to process, and coiling is held
Easily.The different rotating speeds in the case of different weather can be preset using the cooling tower fan of DC brushless motor, it can also root
The rotating speed of DC brushless motor is adjusted according to the leaving water temperature of cooling tower.
The interval width size of adjacent fan groove and the stator diameter dimension scale are 7% on the silicon steel sheet.
Upper end cover and bottom end cover are equipped in the housing, upper end cover is equipped with perforation, and the bottom end of the rotor is arranged on down
On end cap, top passes through the perforation of upper end cover to extend to outside the housing, is arranged with outside the rotor at perforation stepped
Dust-proof water deflector cover.Stepped dust-proof water deflector cover is arranged outside rotor, can with, prevent the water droplet of drippage from entering inside motor,
Its waterproof ability is improved, motor is facilitated to be vertically installed at below fan.
Stair-stepping water collection device is arranged with outside the rotor in the dust-proof water deflector cover.It further improves at perforation
Waterproof effect.
Rotor bottom end housing at the bottom end cover is equipped with deep groove ball bearing.Deep groove ball bearing can support axial direction
Gravity, and ensure the stability of rotor rotation, meet vertically-mounted fan electromotor requirement.
Steel ball and spring leaf are equipped between at the top of the rotor bottom end and the bottom end cover, wherein spring leaf is arranged on described
On bottom end cover, steel ball is arranged between spring leaf and the rotor bottom face.In rotor bottom, spring leaf and steel ball are set, it can be with
The larger axial gravity of support complies fully with the requirement of bearing wind turbine and inverted ventilation effect stress, when steel ball can be fully by running
The impact force of generation is conducted to spring leaf, improves the stability of motor operation.
Wiring is equipped on the housing outside the bottom end cover and connects box.It is convenient that wiring is carried out in box, improve sealing
Performance, using safer under high humidity environment.
Housing at the upper end cover is externally provided with ring flange.Facilitate and be connected to housing on stent vertically.
It is an advantage of the invention that：Simple in structure, without speed change, overall weight is light, has higher operational efficiency and high property
Valency ratio, it is easy to safeguard, safe and reliable.This cooling tower fan DC brushless motor can be set according to the requirement of client
Morning, noon, late three kinds of different rotating speeds, can also be according to the leaving water temperature of cooling tower, the rotating speed of adjust automatically motor.
Description of the drawings
Structure diagram of the attached drawing 1 for cooling tower cooling fan system in the prior art；
Attached drawing 2 is the structure diagram of cooling tower cooling fan system in the embodiment of the present invention；
Attached drawing 3 is the structure diagram of stator iron plate in the embodiment of the present invention；
Attached drawing 4 is A portions enlarged drawing in Fig. 3；
Attached drawing 5 is the structure diagram of DC brushless motor in the embodiment of the present invention；
Attached drawing 6 is the partial structurtes enlarged drawing at DC brushless motor upper end cover in the embodiment of the present invention；
Attached drawing 7 is the partial structurtes enlarged drawing at DC brushless motor bottom end cover in the embodiment of the present invention；
1st, alternating current generator, 2, driving wheel, 3, stent, 4, reduction box, 5, fan, 6, belt, 7, direct current generator, 8, housing,
9th, stator, 10, iron core, 11, fan groove, 12, interval, 13, rotor, 14, upper end cover, 15, bottom end cover, 16, perforation, 17, dust-proof
Water deflector cover, 18, water collection device, 19, deep groove ball bearing, 20, steel ball, 21, spring leaf, 22, wiring connection box, 23, ring flange.
Specific embodiment
Embodiment：
It is a kind of cooling tower fan DC brushless motor refering to Fig. 2-7, wherein direct current generator 7 is fixed on stent 3 vertically
On, fan 5 is connected directly between on the rotor of direct current generator 7.Direct current generator 7 includes housing 8, rotor 13 and by several 10 layers of iron core
The folded stator 9 formed, iron core 10 are integrally formed, and which is provided with several fan grooves 11, refering to Fig. 3-4, ring on iron core 10
It is provided around 15 fan grooves 11, the 12 width dimensions L1 of interval between two neighboring fan groove 11 and 9 diameter dimension of stator
Ratio is more than 5%, less than 9%, is preferably in a proportion of 7%.Housing 8 at upper end cover 14 is externally provided with ring flange 23.In bottom end cover
Housing 8 outside 15 is equipped with wiring and connects box 22.
Refering to Fig. 6, upper end cover 14 and bottom end cover 15 are equipped in housing 8, upper end cover 14 is equipped with perforation 16, rotor 13
Bottom end is arranged on bottom end cover 15, and top passes through the perforation 16 of upper end cover 14 to extend to outside housing 8, the rotor 13 at perforation 16
It is arranged with stair-stepping dust-proof water deflector cover 17 outside.Stair-stepping water collection device is arranged with outside rotor 13 in dust-proof water deflector cover 17
18。
Refering to Fig. 7, the rotor bottom end housing at the bottom end cover is equipped with deep groove ball bearing.13 bottom end of rotor is under
End cap is equipped with steel ball 20 and spring leaf 21 between 15 top, and wherein spring leaf 21 is arranged on bottom end cover 15, and steel ball 20 is arranged on
Between 13 bottom face of spring leaf 21 and rotor.
The requirement of cooling tower fan driving motor is that low speed is high-power, and rotating speed is in 200-500rpm, and power is in 5-35KW.
The alternating current generator of fan driving is now generally used for if required up the powerful requirement of above-mentioned low speed, magnetic pole 6- need to be used
14P, slot number 24-90Z, the alternating current generator or use the device with reduction box, such drive that stator diameter is 260-500mm
Dynamic motor increases overall weight, increases the difficulty of installation and repair.Existing direct current brushless motor speed is usually above
500rpm, and power cannot meet the requirement of 5-35KW, and the stator core of high power DC brushless motor uses plug-in type
Or latticing formula, complicated although spillage of material can be reduced, loosely, installation difficulty increases, and fit precision is difficult to ensure that.
The rotating speed of the DC brushless motor of the embodiment of the present invention can preset morning, noon, three kinds of evening according to weather condition
Different rotating speeds, can also be according to the leaving water temperature of cooling tower, the rotating speed of adjust automatically motor.
In the embodiment of the present invention, the DC. brushless electric machine stator size of selection is as follows：
1st, 5-15KW, stator core size：Outer diameter 260mm, internal diameter 180mm；Slot number 15Z, magnetic pole 14P, copper factor
63.29%, efficiency 81.96-90.72%；
2nd, 20-35KW, stator core size：Outer diameter 368mm, internal diameter 260mm, slot number 18Z, magnetic pole 22P, copper factor
64.86%, efficiency 78.25-88.79%.
Illustrate the optimization of stator core and winding below by way of contrast test：
By taking 5KW motors as an example, rotating speed 200rpm is primary only to change a parameter, compares efficiency change：
1st, fan-shaped height Hs2:
By 24mm → 22mm, efficiency 81.96 → 81.73%；
By 24mm → 26mm, efficiency 81.96 → 81.66%.
2nd, width Bs2 in sector:
By 33.8mm → 31.8mm, efficiency 81.96 → 81.94%；
By 33.8mm → 35.8mm, efficiency 81.96 → 81.76%.
3rd, fan-shaped lower width Bs1:
By 24.7mm → 22.7mm, efficiency 81.96 → 81.94%.
By 24.7mm → 26.7mm, efficiency 81.96 → 81.50%.
4th, fan-shaped outlet Hs0:
By 2.8mm → 2.6mm, efficiency 81.96 → 81.89%；
By 2.8mm → 3.0mm, efficiency 81.96 → 81.86%.
5th, slot number Z:
By 15Z → 12Z, efficiency 81.96 → 80.47%；
By 15Z → 18Z, efficiency 81.96 → 4.04%.
It is the configuration weight comparison of cooling tower application alternating current generator and DC brushless motor below
From above comparison as can be seen that there was only the 20% of variable frequency ac drive weight using DC brushless motor transmission, this
Sample just significantly reduces weight, and cooling tower transmission mechanism is typically mounted on top position, therefore applies alternating current generator actuating unit
When, since the weight of each component is larger, so the hardware frame member support of sufficient intensity must be used, cooling tower can be increased in this way
Cost；And the material of hardware frame member can be accordingly reduced using DC brushless motor transmission mechanism, so as to reduce cooling
The cost of tower.
Above-listed detailed description is illustrating for one of present invention possible embodiments, which is not to limit
The scope of the claims of the present invention, all equivalence enforcements or change without departing from carried out by the present invention are intended to be limited solely by the scope of the claims of this case
In.
Claims (8)
1. a kind of cooling tower fan DC brushless motor, the stator and rotor being laminated including housing, by several iron cores,
It is characterized in that：The iron core is integrally formed, and which is provided with several fan grooves, and the interval between two neighboring fan groove is wide
It spends size and is more than 5% with the stator diameter dimension scale, less than 9%.
2. cooling tower fan DC brushless motor according to claim 1, it is characterised in that：It is adjacent on the silicon steel sheet
The interval width size of fan groove is 7% with the stator diameter dimension scale.
3. cooling tower fan DC brushless motor according to claim 1 or 2, it is characterised in that：It is set in the housing
There are upper end cover and bottom end cover, upper end cover is equipped with perforation, and the bottom end of the rotor is arranged on bottom end cover, and top passes through upper end cover
Perforation extend to outside the housing, stair-stepping dust-proof water deflector cover is arranged with outside the rotor at perforation.
4. cooling tower fan DC brushless motor according to claim 3, it is characterised in that：In the dust-proof water deflector cover
Stair-stepping water collection device is arranged with outside the interior rotor.
5. cooling tower fan DC brushless motor according to claim 1 or 2, it is characterised in that：In the bottom end cover
The rotor bottom end housing at place is equipped with deep groove ball bearing.
6. cooling tower fan DC brushless motor according to claim 5, it is characterised in that：The rotor bottom end and institute
Steel ball and spring leaf are equipped between stating at the top of bottom end cover, wherein spring leaf is arranged on the bottom end cover, and steel ball is arranged on spring
Between piece and the rotor bottom face.
7. cooling tower fan DC brushless motor according to claim 1 or 2, it is characterised in that：In the bottom end cover
The outer housing is equipped with wiring and connects box.
8. cooling tower fan DC brushless motor according to claim 1 or 2, it is characterised in that：In the upper end cover
The housing at place is externally provided with ring flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810021032.8A CN108183565A (en) | 2018-01-10 | 2018-01-10 | Cooling tower fan DC brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810021032.8A CN108183565A (en) | 2018-01-10 | 2018-01-10 | Cooling tower fan DC brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108183565A true CN108183565A (en) | 2018-06-19 |
Family
ID=62550098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810021032.8A Pending CN108183565A (en) | 2018-01-10 | 2018-01-10 | Cooling tower fan DC brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108183565A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5439618A (en) * | 1994-08-09 | 1995-08-08 | Trapasso; Michael A. | Turbine water atomizer |
| JPH07213032A (en) * | 1994-01-25 | 1995-08-11 | Hitachi Ltd | Alternator for vehicle |
| CN201355796Y (en) * | 2009-01-23 | 2009-12-02 | 东明机电（深圳）有限公司 | Brushless DC motor used for suction cleaners |
| RU2514967C1 (en) * | 2012-12-28 | 2014-05-10 | Олег Савельевич Кочетов | Ventilation cooling tower |
| CN208174379U (en) * | 2018-01-10 | 2018-11-30 | 谭仲禧 | Cooling tower fan DC brushless motor |
-
2018
- 2018-01-10 CN CN201810021032.8A patent/CN108183565A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07213032A (en) * | 1994-01-25 | 1995-08-11 | Hitachi Ltd | Alternator for vehicle |
| US5439618A (en) * | 1994-08-09 | 1995-08-08 | Trapasso; Michael A. | Turbine water atomizer |
| CN201355796Y (en) * | 2009-01-23 | 2009-12-02 | 东明机电（深圳）有限公司 | Brushless DC motor used for suction cleaners |
| RU2514967C1 (en) * | 2012-12-28 | 2014-05-10 | Олег Савельевич Кочетов | Ventilation cooling tower |
| CN208174379U (en) * | 2018-01-10 | 2018-11-30 | 谭仲禧 | Cooling tower fan DC brushless motor |
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