CN201504163U - Variable-frequency speed regulating asynchronous motor - Google Patents
Variable-frequency speed regulating asynchronous motor Download PDFInfo
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- CN201504163U CN201504163U CN2009202174002U CN200920217400U CN201504163U CN 201504163 U CN201504163 U CN 201504163U CN 2009202174002 U CN2009202174002 U CN 2009202174002U CN 200920217400 U CN200920217400 U CN 200920217400U CN 201504163 U CN201504163 U CN 201504163U
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- motor
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- asynchronous motor
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Abstract
The utility model relates to an asynchronous motor used in an AC drive system for a large mine electrical shovel and used as a push driving motor, in particular to a novel variable-frequency speed regulating asynchronous motor. The utility model aims to solve the problems that the requirements to the technical parameters and the operating conditions of the AC-driven electrical shovel developed in China for the first time to the push driving asynchronous motor are higher, and meanwhile, the prior asynchronous motor cannot meet the requirement. The variable-frequency speed regulating asynchronous motor comprises a machine seat, a front end cover, a rear end cover, a stator and a rotor, wherein an air inlet is formed on the motor seat at the driving end of the motor, a forced draught cooling device is installed at the air inlet, and an air outlet is formed at the bottom of the machine seat at the non-driving end of the motor; a cylindrical roller bearing and an earthing brush are respectively arranged at the driving end of the motor, a horizontal double-bearing supporting structure for an insulated bearing is arranged at the non-driving end, a bearing cap with an oil chamber structure is arranged outside the bearing, the earthing brush is arranged on a rear outer bearing cap of the cylindrical roller bearing, and a speed measuring gear and a speed measuring sensor matched with the speed measuring gear are arranged at the shaft end at the non-driving end of the motor.
Description
Technical field
The utility model relates to asynchronous motor, particularly is used for the asynchronous motor of large-scale mine power shovel alternating-current actuating system as the pushing drive motors, is specially a kind of novel variable-frequency control asynchronous motor.
Background technology
20 cubic metres exchange the transmission power shovel and belong to the domestic great equipment of developing first, before this, this type of equips long-term dependence on import China, the domestic processing of having only minority enterprise can finish the part mechanical part, complete machine all is to be finished by overseas enterprise, the moving part of fax in the core technology becomes the restraining factors that restriction China develops this type of equipment by external directly control.For this reason, in order to solve the situation of the long-term dependence on import of restriction China's ten-million-ton scale glory-hole equipment, and effective safe and reliable, excavation advantage that performance is good, the equipment rate of attendance is high of interchange transmission power shovel of utilizing, under the situation that the fast-developing device requirement in fields such as the present iron and steel of China, coal increases, replace the direct current power shovel, exploit market rapidly, development and Design novel variable-frequency control asynchronous motor.
20 cubic metres of power shovel AC system are domestic did not produce, the pushing motor faces frequent starting and stopping and rotating in its excacation, requirements such as the technical parameter of motor, service conditions there is strict demand, existing asynchronous motor can't meet the demands, and determining rational structure and improving each link reliability of operation is the utility model technological difficulties to be solved.
Summary of the invention
The utility model is had relatively high expectations at the domestic interchange transmission power shovel of developing first drives asynchronous motor to pushing technical parameter, service conditions etc., simultaneously, the problem that existing asynchronous motor can't meet the demands provides a kind of novel variable-frequency control asynchronous motor.
The utility model is to adopt following technical scheme to realize: variable-frequency control asynchronous motor, stator that comprises support, front end housing, rear end cap, forms by stator core and stator winding and the rotor of forming by rotor core and rotor winding, on electric-motor drive terminal seat, offer air inlet, the forced ventilation cooling device is installed on the air inlet, sets out the air port in motor non-transmision end support bottom; Motor is that driving end is established cylinder roller bearing and added the ground connection brush, the horizontal-type biaxial that non-transmision end is established insulation bearing holds supporting construction, the bearing outside is provided with the bearing cap of accumulator structure, bearing cap comprises back outer bearing cover, back inside cap and preceding inside cap, preceding outer bearing cover, grounding brush is fixed on the back outer bearing cover of cylinder roller bearing, motor non-transmision end rotating shaft axle head is provided with measure speed gears, measure speed gears peripheral hardware gear cover is fixed with the velocity transducer that matches with measure speed gears on it.
In order to adapt to the driving requirement of large-scale power shovel, the degree of protection that motor requires is IP23, so this asynchronous motor adopts forced ventilation cooling structure, force cooling device by the air channel cooling air to be sent into motor interior from the air inlet on the electric-motor drive terminal seat, cooling air ventilation slot through between end to stator core back and support inner chamber cools off iron core and winding to stator end again; Simultaneously, flow through rotor core axial ventilation hole and air gap of another wind path cools off rotor, and wind path merges in non-transmision end and flows out from the exhaust vent of support bottom.Cooling air fully cools off stator core, rotor core, rotor winding, bearing etc., and another part heat is taken away by the natural heat dissipation of support and end cover surface.
The utility model has adopted the duplex bearing supporting construction, driving end adopts cylinder roller bearing to add the ground connection brush, non-transmision end adopts insulation bearing, in order to bear in the power shovel work because of Fraquent start and the positive and negative then shaft current that produces to the impact that bearing of motor causes, the bearing of avoiding occurring easily is around decreasing fault; The bearing cap at motor two ends has adopted special accumulator structure, and is provided with fuel loading system and bearing temperature sensor detecting device, user-friendly and maintenance, protection bearing of motor system safety reliability service.
Compared with prior art, the variable-frequency control asynchronous motor that the utility model provides has following beneficial effect: variable-frequency control asynchronous motor described in the utility model improves and has optimized ventilation cooling structure, bearings, prevents that the bearing cap at shaft current structure and motor two ends from having adopted special accumulator structure, it is rational in infrastructure, performance index are high, motor efficiency is high, power factor is high, temperature rise is low, electric property and reliable in mechanical performance, is particularly useful for exchanging in the power shovel of transmission driving asynchronous motor as pushing.
Description of drawings
Fig. 1 is the internal structure schematic diagram of variable-frequency control asynchronous motor described in the utility model.
Among the figure: 1-grounding brush, 2-rear end cap, 3-cylinder roller bearing, the 4-support, 5-stator core, 6-rotor core, the 7-stator winding, 8-insulation bearing, 9-front end housing, the 10-measure speed gears, 11-velocity transducer, outer bearing cover behind the 12-, inside cap behind the 13-, outer bearing cover before the inside cap before the 14-, 15-, the 16-gear cap.
Embodiment
Variable-frequency control asynchronous motor, stator that comprises support 4, front end housing 9, rear end cap 2, forms by stator core 5 and stator winding 7 and the rotor of forming by rotor core 6 and rotor winding, on electric-motor drive terminal seat 4, offer air inlet, the forced ventilation cooling device is installed on the air inlet, sets out the air port in motor non-transmision end support 4 bottoms; Motor is that driving end is established cylinder roller bearing 3 and added ground connection brush 1, the horizontal-type biaxial that non-transmision end is established insulation bearing 8 holds supporting construction, bearing 3,8 outsides are provided with the bearing cap of accumulator structure, bearing cap comprises back outer bearing cover 12, back inside cap 13 and preceding inside cap 14, preceding outer bearing cover 15, grounding brush 1 is fixed on the back outer bearing cover 12 of cylinder roller bearing 3, motor non-transmision end rotating shaft axle head is provided with measure speed gears 10, measure speed gears 10 peripheral hardware gear covers 16 are fixed with the velocity transducer 11 that matches with measure speed gears 10 on it.
In order to adapt to the driving requirement of large-scale power shovel, the degree of protection that motor requires is IP23, so this asynchronous motor adopts forced ventilation cooling structure, force cooling device by the air channel cooling air to be sent into motor interior from the air inlet on the electric-motor drive terminal seat 4, cooling air ventilation slot through between end to stator core 5 backs and support 4 inner chambers cools off iron core and winding to stator end again; Simultaneously, another wind path cools off rotor through rotor core 6 axial ventilation holes and air gap, and wind path merges in the exhaust vent outflow of non-transmision end from support 4 bottoms.Cooling air fully cools off stator core 5, rotor core 6, rotor winding 7, bearing etc., and another part heat discharges by the natural heat dissipation on support 4 and forward and backward end cap 9,2 surfaces.
The utility model has adopted the duplex bearing supporting construction, driving end adopts NU330 cylinder roller bearing 3, non-transmision end adopts NJ320 insulation bearing 8, in order to bearing in the power shovel work impact that bearing of motor is caused because of Fraquent start and shaft current positive and negative then that produce, with the bearing avoiding occurring easily around decreasing fault; Simultaneously, the low temperature grease that motor adopts XOM to produce, to adapt to-40 ℃ open-air surface mine working environment, the bearing cap at motor two ends has adopted special accumulator structure, and be provided with fuel loading system and bearing temperature sensor detecting device, user-friendly and safeguard protection bearing of motor system safety reliability service; Motor uses insulation bearing and the supporting use of grounding brush, to prevent the damage of shaft current to bearing.
Concrete, asynchronous motor is under the requirement of satisfying performance parameters such as voltage, power, efficient, power factor, its winding construction has determined electromagnetic structure, the conductor material of motor, selection, consumption and the serviceability of insulating material, thereby has determined manufacturing process, manufacturing cost and the dependability of motor.This motor is selected the moulding winding that used reliability high in design, the operating characteristic when a cover winding satisfies nominal operation characteristic and 1.5 times of overloads simultaneously, and require to have 1.3 times of overload capacity in the most abominable working point.Sliver, the welded rotor winding of end ring have been adopted in the utility model design, have improved the machine operation reliability, guarantee parameter of electric machine consistency.
At present, actual conditions in conjunction with locomotive traction motor insulating material application on the market, this variable-frequency control asynchronous motor is selected 200 class F insulation systems, its objective is to make interchange transmission power shovel have higher dependability and longer life-span, and performance exchanges the advantage of transmission than DC Transmission.Wherein, stator winding 7 has adopted the deposited lead of polyimide film, and film is produced by E.I.Du Pont Company.Winding inter-turn pad one deck insulating paper, to turn-to-turn insulation row reinforcement again, this is at a little less than the external motor turn-to-turn relative thin, the specific aim measure that easy over-heated fault is taked.Good electric property, few glue mica film band that heat-sinking capability is strong have been adopted in the coil outsourcing.Be provided with slot liner in the core slots, embed the damage that may occur in the deep trouth to guarantee coil.The iron core of motor and coil overall vacuum pressure dipping lacquer (VPI), rotary roasting is handled, and guarantees the insulation quality and the outward appearance of motor.
The basic fundamental parameter and the running environment condition of this variable-frequency control asynchronous motor (YJ13L4) are as follows:
1, basic fundamental parameter:
Duty is continuous
Number of phases three-phase
The rotor type squirrel-cage
Rated power 350kW
Rated voltage 690V
Rated speed 740r/min
Rated frequency 37.5Hz
Height of center 400mm
Efficient 95% under the rated power
Rated power factor 0.83
Winding connection method Y connection
Nominal torque＞2260Nm
200 grades of the classes of insulation
Degree of protection IP23
Motor should have the ability of working under the 500kW operating mode simultaneously, and at 500kW, the most abominable working point of 50Hz has 1.3 times of overload capacity.
2, working environment:
Motor should be able to normally move under following condition:
A. below the height above sea level 1000m;
B. the highest ambient air temperature in shelter from the sun is 40 ℃;
C. minimum ambient air temperature is-30 ℃;
D. field work suffers the invasion and attack of dust storm sleet;
The result of the test of variable-frequency control asynchronous motor (YJ13L4) and the utilization result of appraisal, the development that this type motor has been described is successful, reach or near the internal performance and the presentation quality level of developed country's like product, simultaneously it has effectively promoted the comprehensive localization process of national large-scale mine plant equipment.
Claims (3)
1. variable-frequency control asynchronous motor, stator that comprises support (4), front end housing (9), rear end cap (2), forms by stator core (5) and stator winding (7) and the rotor of forming by rotor core (6) and rotor winding, it is characterized in that: on electric-motor drive terminal seat (4), offer air inlet, the forced ventilation cooling device is installed on the air inlet, sets out the air port in motor non-transmision end support (4) bottom; Motor is that driving end is established cylinder roller bearing (3) and added ground connection brush (1), the horizontal-type biaxial that non-transmision end is established insulation bearing (8) holds supporting construction, bearing (3,8) outside is provided with the bearing cap of accumulator structure, bearing cap comprises back outer bearing cover (12), back inside cap (13) and preceding inside cap (14), preceding outer bearing cover (15), grounding brush (1) is fixed on the back outer bearing cover (12) of cylinder roller bearing (3), motor non-transmision end rotating shaft axle head is provided with measure speed gears (10), measure speed gears (10) peripheral hardware gear cover (16) is fixed with the velocity transducer (11) that matches with measure speed gears (10) on it.
2. variable-frequency control asynchronous motor as claimed in claim 1 is characterized in that: described stator winding (7) turn-to-turn is provided with insulating paper, and slot liner is set in the stator coring groove.
3. variable-frequency control asynchronous motor as claimed in claim 1 or 2 is characterized in that: described rotor winding adopts sliver, end ring Welding Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202174002U CN201504163U (en) | 2009-09-28 | 2009-09-28 | Variable-frequency speed regulating asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202174002U CN201504163U (en) | 2009-09-28 | 2009-09-28 | Variable-frequency speed regulating asynchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201504163U true CN201504163U (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202174002U Expired - Fee Related CN201504163U (en) | 2009-09-28 | 2009-09-28 | Variable-frequency speed regulating asynchronous motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102857053A (en) * | 2012-08-30 | 2013-01-02 | 永济新时速电机电器有限责任公司 | Variable frequency speed regulation asynchronous traction motor for AC (alternating-current) transmission mine dump truck |
| CN103475141A (en) * | 2013-10-11 | 2013-12-25 | 江阴美森电气有限公司 | Easily maintained variable frequency speed regulation asynchronous motor |
| CN104702051A (en) * | 2015-03-25 | 2015-06-10 | 永济新时速电机电器有限责任公司 | High-reliability speed measuring type double-way speed measuring structure of motor |
| CN106230193A (en) * | 2016-08-16 | 2016-12-14 | 中车永济电机有限公司 | Quarry tipper variable-frequency adjustable-speed asynchronous traction motor |
| CN110601415A (en) * | 2018-06-13 | 2019-12-20 | 中车永济电机有限公司 | Nine-phase variable-frequency speed regulation asynchronous motor for fracturing pump |
-
2009
- 2009-09-28 CN CN2009202174002U patent/CN201504163U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102857053A (en) * | 2012-08-30 | 2013-01-02 | 永济新时速电机电器有限责任公司 | Variable frequency speed regulation asynchronous traction motor for AC (alternating-current) transmission mine dump truck |
| CN103475141A (en) * | 2013-10-11 | 2013-12-25 | 江阴美森电气有限公司 | Easily maintained variable frequency speed regulation asynchronous motor |
| CN103475141B (en) * | 2013-10-11 | 2015-06-10 | 江阴美森电气有限公司 | Easily maintained variable frequency speed regulation asynchronous motor |
| CN104702051A (en) * | 2015-03-25 | 2015-06-10 | 永济新时速电机电器有限责任公司 | High-reliability speed measuring type double-way speed measuring structure of motor |
| CN106230193A (en) * | 2016-08-16 | 2016-12-14 | 中车永济电机有限公司 | Quarry tipper variable-frequency adjustable-speed asynchronous traction motor |
| CN110601415A (en) * | 2018-06-13 | 2019-12-20 | 中车永济电机有限公司 | Nine-phase variable-frequency speed regulation asynchronous motor for fracturing pump |
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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: 20100609 Termination date: 20140928 |
|
| EXPY | Termination of patent right or utility model |