CN106787394B - Air-air cooling box type variable frequency motor - Google Patents
Air-air cooling box type variable frequency motor Download PDFInfo
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- CN106787394B CN106787394B CN201611166500.8A CN201611166500A CN106787394B CN 106787394 B CN106787394 B CN 106787394B CN 201611166500 A CN201611166500 A CN 201611166500A CN 106787394 B CN106787394 B CN 106787394B
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- 238000001816 cooling Methods 0.000 title claims abstract description 205
- 238000009423 ventilation Methods 0.000 claims abstract description 45
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 35
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000007664 blowing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
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- 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
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
- H02K9/18—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses an air-air cooling type box-type variable frequency motor, which comprises a motor main body and an air-air cooler, wherein the motor main body comprises a machine seat, a rotating shaft, a stator iron core, a stator coil, a rotor iron core and an inner fan, a machine seat air inlet is formed above a non-shaft extending end of the machine seat, and a machine seat air outlet is formed above the inner fan; the air-to-air cooler is internally provided with an intermediate baffle plate which divides the air-to-air cooler into an A cooling cavity and a B cooling cavity which are axially arranged along a rotating shaft, wherein the A cooling cavity is communicated with the interior of the motor main body at an air inlet of the engine base, and the B cooling cavity is communicated with the interior of the motor main body at an air outlet of the engine base; the air-air cooler is internally and horizontally provided with a plurality of rows and a plurality of columns of cooling pipes in a penetrating way, and the cooling pipes are connected with an external forced ventilator; an air-air cooler is arranged above the cooling cavity A and is provided with an internal forced air device. The invention has the characteristics of good cooling effect, small vibration of the forced ventilation motor, high degree of universalization of parts and capability of reducing the production and manufacturing cost of the motor.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to an air-to-air cooling type box-type variable frequency motor.
Background
The main body of the air-air cooling type box-type variable frequency motor comprises a machine seat, an end cover, a bearing device, a rotating shaft, a stator core, a stator coil, a rotor core, an inner fan, a wind shield and the like. An air-air cooler is arranged above the motor main body, the air-air cooler, the motor base, the end cover, the bearing device, the rotating shaft and the like form a shell with high protection level, and air in the motor is sealed in the shell. The motor is not circulated with the outside air, so that dust and water in the motor is charged and the rotating part and the outside use environment are separated, the insulation strength of the charged part in the motor is prevented from being reduced, the rotating part is prevented from being worn, and the use reliability of the motor is improved. The dust-water separator is widely used in severe use occasions with more dust and water in the environment.
As shown in fig. 1, the heat dissipation of the air-to-air cooling type box-type variable frequency motor transfers the heat generated by the heating component in the motor shell to the air-to-air cooling pipe on the air-to-air cooler through the circulation flow of the air in the motor, so that the outside air is blown to flow in the cooling pipe through the externally installed forced ventilator, and the heat is dissipated into the outside environment, so that the motor is cooled.
When the air-to-air cooling box type variable frequency motor runs at low frequency, the rotating speed of the rotor is very low, and the inner fan of the rotor cannot generate enough inner air passage air quantity to cool the stator and the rotor in the motor, so that the temperature of the motor is easily increased. In order to ensure that the temperature rise of the motor is normal when the motor runs at high and low frequencies, a forced air motor with constant rotation speed is required to be added on an air-to-air cooler, a centrifugal fan is arranged on a motor shaft of the forced air motor, and the forced air effect of the centrifugal fan is utilized to generate enough air quantity of an inner air path to cool the stator and the rotor in the motor.
The internal air path structure of the air-air cooling box type variable frequency motor commonly used in the motor industry at present is a double-side symmetrical forced ventilation internal air path. The inner air path structure is characterized in that an inner fan is respectively arranged on rotating shafts at two ends of a motor rotor core, a corresponding wind shield is arranged on the top of an air-to-air cooler right above the motor stator core, a forced air motor and a fan are arranged on the top of the air-to-air cooler right above the motor rotor core, air for cooling the motor stator and the motor rotor in the middle of the motor is circulated above the air-to-air cooler through a cooling pipe row by virtue of the air pressing effect of the inner fans at the two ends of the motor rotor core and the suction effect of the forced air fan, and then part of air passes through the forced air fan and the cooling pipe rows at the two ends of the air-to-air cooler, so that the air cooled by the cooling pipe reenters the motor stator and the motor rotor. The internal air path distributes heat generated in the motor to the external environment through external air flowing in the cooling pipe in the circulation process, so that the motor is cooled.
At present, a box type non-variable frequency motor commonly used in the motor industry, such as a Y, YKS series motor, as shown in fig. 2 and 3, most of Y, YKS series motors are of a single-side inner air path structure, and a centrifugal inner fan is arranged at one end of a motor rotor core in the inner air path structure, so that the outer diameter of the centrifugal fan is larger than the inner diameter of a stator in order to obtain larger inner air path air quantity. When the motor rotor is installed, a section of the motor rotor, on which the inner fan is not installed, passes through the inner diameter of the stator, and two ends of the shaft are fixed on the motor end covers.
In the air-air cooling type box-type variable frequency motor in the prior art, the air path is designed into a bilateral symmetrical inner air path, so that a rotor can penetrate through the inner diameter of a stator during motor assembly, and the outer diameter of an inner fan arranged at two ends of a rotor core cannot be larger than the inner diameter of the stator. When the motor runs at low frequency, the outer diameter of the inner fan is small due to low rotation speed of the rotor, the wind pressure and the wind quantity of the inner fan are small, the fan capacity of the rotor cannot be fully utilized, and the cooling effect of the motor is poor.
In the prior art, the forced air cooling box type variable frequency motor at the top of the air-air cooler is simply arranged on a motor top plate, no additional supporting measures are taken, the supporting strength of the forced air motor is poor, the vibration of the forced air motor is large, the forced air motor is often damaged too early, and the use reliability of the whole air-air cooling box type variable frequency motor is low.
The air-air cooling box type variable frequency motor in the prior art has the defects that the mounting positions of stator and rotor cores in the motor are inconsistent due to the fact that an inner air path structure is different from that of a box type non-variable frequency motor, the structures of a rotating shaft, a fan, a wind shield, an inner fan, a machine seat and an air-air cooler are different, main parts of the motor with the same machine seat number are required to be redesigned and manufactured except for stator cores, rotor cores, end covers and bearing devices which can be universal to the box type non-variable frequency motor, the universalization degree of the parts is not high, mass production cannot be realized, labor productivity is reduced, and production and manufacturing cost is improved.
Disclosure of Invention
The invention aims to solve the defects of the existing air-air cooling box type variable frequency motor, and provides the air-air cooling box type variable frequency motor which has the advantages of good cooling effect, small vibration of a forced air motor, high degree of commonality of parts and low production and manufacturing cost.
In order to solve the technical problems, the invention adopts the following technical scheme: an air-air cooling box type variable frequency motor comprises a motor main body and an air-air cooler arranged above the motor main body, wherein the motor main body comprises a machine seat, a rotating shaft, a stator iron core, a stator coil, a rotor iron core and an inner fan,
a machine seat air inlet corresponding to the air-to-air cooler is arranged above the non-shaft extension end of the machine seat, an inner fan is arranged at one end of the shaft extension end of the rotating shaft, a machine seat air outlet corresponding to the air-to-air cooler is arranged at the machine seat above the inner fan, and a single-side inner air path is formed inside the motor main body;
the air-to-air cooler is internally provided with an intermediate baffle plate to divide the air-to-air cooler into two independent cooling cavities axially arranged along the rotating shaft, wherein the two cooling cavities are an A cooling cavity and a B cooling cavity respectively, the A cooling cavity is communicated with the interior of the motor main body at the air inlet of the engine base, and the B cooling cavity is communicated with the interior of the motor main body at the air outlet of the engine base; the air flow direction in the cooling cavity A is the air flow direction in the motor main body and the air flow direction in the air-to-air cooler, and the air flow direction in the cooling cavity B is the air flow direction in the air-to-air cooler and the motor main body;
a gap in the height direction is reserved between the upper end of the middle partition plate and the top of the air-air cooler;
a plurality of rows of cooling pipes are horizontally arranged in the air-air cooler in a penetrating way, and the cooling pipes penetrate through the middle partition plate; an air outlet channel of the external forced ventilator is connected with the cooling pipe;
the air-air cooler is arranged above the cooling cavity A, an internal forced air device is arranged above the cooling cavity A, the internal forced air device comprises an air isolation plate, the air isolation plate is arranged in the cooling cavity A and is positioned above the cooling pipe, a vent hole is formed in the air isolation plate, a space enclosed between the air isolation plate, the air-air cooler and the middle partition plate is an internal forced air space, a U-shaped air guide plate is arranged in the internal forced air space, the opening of the U-shaped air guide plate gradually increases and faces the cooling cavity B, an internal forced air fan is arranged inside the U-shaped air guide plate, and the internal forced air fan is in transmission connection with an internal forced air motor arranged outside the air-air cooler.
The air-to-air cooler comprises an outer cover consisting of a front end plate, a rear end plate, a bottom plate, a top plate and two side plates, wherein the front end plate corresponds to the shaft extension end of the machine base, the rear end plate corresponds to the non-shaft extension end of the machine base, the bottom plate and the top plate are respectively arranged at the bottom and the top of the air-to-air cooler, and the peripheries of the bottom plate and the top plate are respectively fixedly connected with the two side plates, the front end plate and the rear end plate;
the non-shaft extension end of the bottom plate is provided with a cooler air outlet corresponding to the air inlet of the machine base, and the shaft extension end of the bottom plate is provided with a cooler air inlet corresponding to the air outlet of the machine base.
The bottom plate of the air-air cooler is provided with a threaded hole corresponding to the unthreaded hole at the top of the machine base, and the air-air cooler is fixedly connected with the machine base through the bottom plate.
The cooling pipe is arranged along the axis direction parallel to the rotating shaft, and the external forced ventilator is arranged at the rear end plate of the air-to-air cooler.
The cooling pipe is arranged along the axis direction vertical to the rotating shaft, and the external forced ventilator is arranged at the side plate of the air-air cooler.
The arrangement mode of the internal forced air motor is as follows: a mounting hole is formed in the top plate above the cooling cavity A, a flange plate is fixedly arranged at the position, corresponding to the mounting hole, outside the top plate, of the inner forced ventilation motor, the inner forced ventilation motor is vertically arranged on the flange plate through a motor seat plate of the inner forced ventilation motor, and a main shaft of the inner forced ventilation motor penetrates through the mounting hole and is connected with an inner forced ventilation fan.
The inner sides of the two side plates are respectively and fixedly connected with a supporting plate, the supporting plates are positioned between the front end plate and the middle partition plate, and the connecting line of the two supporting plates is perpendicular to the axis of the rotating shaft and coincides with the circle center of the flange plate;
the height of the supporting plate is equal to the distance between the top plate and the bottom plate, the upper end and the lower end of the supporting plate are respectively fixedly connected with the top plate and the bottom plate,
the distance between the inner edges of the two support plates is larger than the inner diameter of the flange plate and smaller than the outer diameter of the flange plate;
the middle partition plate is welded with a support column above, the lower part of the support column is supported on the middle partition plate, the upper part of the support column is supported on the top plate, the vertical axis of the support column is positioned between the inner diameter and the outer diameter of the flange plate, and the flange plate is positioned on the edge of the outer diameter of the upper part of the front end plate and is flush with the outer end face of the front end plate.
The air vent of the air baffle plate is fixedly provided with a circular ring, the length of part of the circular ring is inserted into the air inlet of the internal forced ventilation fan, and the periphery of the air baffle plate is fixedly connected with the front end plate, the side plate and the middle partition plate respectively;
the height of the U-shaped air guide plate is equal to the distance between the top plate and the air separation plate, and two ends of the arc-shaped plate of the U-shaped air guide plate in the length direction are fixedly connected to the two side plates respectively;
the left end and the right end of the middle partition plate are fixedly connected with the two side plates, and the lower end of the middle partition plate is fixedly connected with the bottom plate.
The motor comprises a motor body, wherein a rotating shaft or a rotor core of the motor body is provided with an air channel for cooling a rotor, a stator core of the motor body is provided with an air channel for cooling a stator, and a wind shield is arranged between an inner fan and the stator core and between the inner fan and the rotor core.
The support plate for supporting the stator core is fixedly arranged in the machine base, and an axial ventilation opening is arranged at the support plate at the shaft extension end of the machine base.
The beneficial effects of the invention are as follows:
according to the air-air cooling box type variable frequency motor, the inner air passage of the motor main body is designed to be of a single-side inner air passage structure, the middle partition plate is arranged in the middle of the air-air cooler, the inner part of the air-air cooler is divided into two independent cooling cavities A, B which are axially arranged along the rotating shaft, and the inner forced ventilation motor and the inner forced ventilation fan are arranged above the cooling cavity A, so that a forced ventilation power element is added in the single-side inner air passage of the air-air cooler, and the air passage of the box type variable frequency motor main body and the air passage of the air-air cooler are connected in series to form the single-side forced ventilation inner air passage structure of the whole motor. The centrifugal inner fan with large outer diameter arranged on the rotating shaft can generate higher wind pressure when the motor operates, and can work in series with the wind pressure generated by the internal forced air fan of the air-air cooler, so that the circulating wind pressure of the inner wind path of the motor is improved, the wind quantity of the inner wind path is further improved, and the cooling effect of the motor is improved.
The upper end of the middle partition plate of the hollow air cooler and the top plate of the outer cover of the hollow air cooler are provided with gaps in the height direction, cooling air from the machine base firstly enters the cooling cavity A, then enters the cooling cavity B through the gaps above the middle partition plate, and then enters the machine base again to form a single-side circulating air path.
According to the air-air cooling box type variable frequency motor, the U-shaped air deflector is arranged on the periphery of the forced air fan above the A cooling cavity of the air-air cooler, and the opening of the U-shaped air deflector gradually becomes larger and faces the B cooling cavity of the air-air cooler. The U-shaped air deflector can guide the air flow generated by the internal forced ventilation fan to smoothly flow to the air outlet area, and can prevent the air flow from generating eddy loss at the corners of the air-to-air cooler and the welded support plates of the side plates of the air-to-air cooler, so that the ventilation efficiency of the fan can be improved, and the cooling effect can be improved.
The air-air cooling box type variable frequency motor has the advantages that the inner air path of the motor main body adopts a single-side inner air path structure, and the structure of the motor main body is the same as that of a box type non-variable frequency motor with the same base number, so that other main parts of the motor main body such as a base, an end cover, a bearing device, a rotating shaft, a stator iron core, a stator coil, a rotor iron core, an inner fan, a wind shield and the like can be used for the box type non-variable frequency motor with the same base number except for a stator coil, the universalization degree of the motor parts is high, batch production can be realized, labor productivity is improved, and the production and manufacturing cost of the motor is reduced.
The hollow air cooler fully utilizes the structural members of the hollow air cooler as the support of the internal forced air motor, so that the support strength can be obviously improved, and the vibration of the internal forced air motor can be reduced.
According to the air-air cooling box type variable frequency motor, the flange plate for installing the forced air motor seat plate is welded above the A cooling cavity of the air-air cooler, and the two support plates are welded below the flange plate through the inner sides of the outer cover side plates, so that the distance between the inner edges of the two support plates is larger than the inner diameter of the flange plate and smaller than the outer diameter of the flange plate, and the function of supporting the flange plate can be achieved; the vertical axis of support column is located between the internal diameter and the external diameter of ring flange, and the external diameter edge that the ring flange is located the end plate top is parallel and level with the outer terminal surface of end plate for air cooler intermediate head plate top welded support column and air cooler end plate all can play the effect that supports the ring flange and support, can improve the support strength of ring flange, avoid interior forced air motor vibration.
The cooling pipes in the air-air cooler of the air-air cooling box type variable frequency motor have two arrangement schemes: 1. the cooling pipe is arranged along the axis direction parallel to the rotating shaft, and the external forced ventilator is arranged at the rear end plate of the air-air cooler; 2. the cooling pipe is arranged along the axis direction perpendicular to the rotating shaft, the external forced ventilator is arranged at the side plate of the air-to-air cooler, and the two schemes can realize that the external air is pushed to pass through the inner hole of the cooling pipe by the external forced ventilator and take away the heat of the wall of the cooling pipe.
According to the air-air cooling box type variable frequency motor, the inner forced ventilation motor and the outer forced ventilation motor are respectively positioned at two ends of the air-air cooler, the interval distance is long, resonance of the inner forced ventilation motor and the outer forced ventilation motor can be avoided through damping action of structural members of the air-air cooler, and the operation reliability of the forced ventilation motor can be improved.
Drawings
Fig. 1 is a schematic diagram of a box-type variable frequency motor of the prior art;
FIG. 2 is a schematic diagram of a Y-series motor structure in a prior art box-type non-variable frequency motor;
FIG. 3 is a schematic diagram of the structure of a YKS series motor in a prior art box-type non-variable frequency motor;
FIG. 4 is a schematic diagram of the structure of the present invention;
fig. 5 is a cross-sectional view A-A of the schematic structure of fig. 4.
Detailed Description
Embodiment one:
as shown in fig. 4 to 5, the air-to-air cooling box type variable frequency motor of the present invention includes a motor main body 1 and an air-to-air cooler 2. The motor main body 1 comprises a machine base 1-1, an end cover 1-2, a bearing device 1-3, a rotating shaft 1-4, a stator core 1-5, a stator coil 1-6, a rotor core 1-7, an inner fan 1-8, a wind shield 1-9 and the like. An air-air cooler 2 is arranged above the motor main body, the air-air cooler 2, the motor base 1-1, the end cover 1-2, the bearing device 1-3, the rotating shaft 1-4 and the like form a totally-enclosed shell, and air in the motor is enclosed in the shell.
The support plate 1-1-1 for supporting the stator core is welded in the machine base.
The inner air path of the motor main body 1 is of a single-side inner air path structure. The air conditioner comprises a machine base 1-1, a machine base air inlet 1-2 corresponding to an air-air cooler, a motor rotating shaft 1-4 or a rotor iron core 1-7, an air channel for cooling a rotor, an air channel for cooling a stator, an axial ventilation opening 1-1-3, an inner fan 1-8, a wind shield 1-9, and a machine base air outlet 1-1-4 corresponding to the air-air cooler 2, wherein the machine base air inlet 1-1-2 corresponds to the air-air cooler, the air channel for cooling the rotor is arranged above a non-shaft extending end of the machine base 1-1, the machine base air inlet 1-1-4 corresponds to the air-air cooler is arranged above a supporting plate 1-1 of the shaft extending end of the machine base, the inner fan 1-8 is arranged at one end of the shaft extending end of the rotating shaft 1-4, and the wind shield 1-9 is arranged between the inner fan 1-8 and the stator iron core 1-5 and the rotor iron core 1-7.
The air-to-air cooler 2 of the motor comprises a cooling pipe 2-1, a front end plate 2-2, a rear end plate 2-3, a middle partition plate 2-4, a bottom plate 2-5, a top plate 2-6, a side plate 2-7, an inner forced air motor 2-8, a motor seat plate 2-9, a flange plate 2-10, an inner forced air fan 2-11, an air baffle plate 2-12, a circular ring 2-13, a supporting plate 2-14, a supporting column 2-15, a U-shaped air baffle plate 2-16, an outer forced air fan 2-17 and the like.
The motor air-air cooler 2 is internally provided with a plurality of rows and columns of cooling pipes 2-1 parallel to the axis of the rotating shaft 1-4, an intermediate baffle plate 2-4 is arranged in the middle of the air-air cooler 2, the cooling pipe rows penetrate through the baffle plate 2-4, and the outer walls at two ends of the cooling pipes 2-1 are fixed on the front end plate 2-2 and the rear end plate 2-3. The left and right ends of the middle partition plate 2-4 are welded with the two side plates 2-6-1 of the outer cover 2-6, and the lower end is welded with the bottom plate 2-5. The middle partition plate 2-4 divides the cooling cavity of the air-air cooler 2 into an A cooling cavity 2-18 and a B cooling cavity 2-19, wherein the A cooling cavity 2-18 is positioned above the fan 1-8 in the motor. The upper end of the middle partition plate 2-4 is provided with a gap in the height direction with the top plate 2-6.
A bottom plate 2-5 is welded below the air-to-air cooler 2, and the periphery of the bottom plate 2-5 is welded with two side plates 2-7, a front end plate 2-24 and a rear end plate 2-53 respectively. Threaded holes corresponding to the unthreaded holes in the top plate of the machine base are machined in the bottom plate 2-5. The air-to-air cooler 2 is connected with the machine base 1-1 through the bottom plate 2-5. The non-shaft extension end of the bottom plate 2-5 is provided with an air-to-air cooler air outlet 2-5-1 corresponding to the engine base air inlet 1-1-2, and the shaft extension end is provided with an air-to-air cooler air inlet 2-5-2 corresponding to the engine base air outlet 1-1-4.
The rear end plate 2-5 of the air-to-air cooler 2 is provided with an external forced ventilator 2-17 which pushes the outside air to pass through the inner hole of the cooling pipe 2-1 and takes away the heat of the inner wall of the cooling pipe 2-1.
The air cooler 2 is characterized in that an air baffle plate 2-12 is arranged above a cooling pipe 2-1 of an A cooling cavity 2-18 of the air cooler 2, a round hole is formed in the middle of the air baffle plate 2-12 and used as a vent hole, a round ring 2-13 is welded at the round hole, part of the length of the round ring 2-13 is inserted into an air inlet of an inner forced air fan 2-11, and the axes of the inner forced air motor 2-8 and the inner forced air fan 2-11 are overlapped with the center of the round hole in the middle of the air baffle plate 2-12. The periphery of the air baffle plate 2-12 is welded with the upper ends of the front end plate 2-4, the side plate 2-7 and the middle baffle plate 2-4 respectively.
A round hole is processed on the top plate 2-6 above the cooling cavity 2-18, and a flange plate 2-10 is welded. In order to improve the supporting strength of the flange plate 2-10 and avoid the vibration of the forced ventilation motor, the inner sides of the two side plates 2-6 are respectively welded with a supporting plate 2-14, and the supporting plates 2-14 are positioned between the front end plate 2-4 and the middle partition plate 2-44. The connecting line of the two support plates 2-14 is perpendicular to the axis of the rotating shaft 1-4 and coincides with the circle center of the flange plate 2-10. The height of the supporting plate 2-14 is equal to the distance between the top plate 2-6 and the bottom plate 2-5 of the air-to-air cooler, and the upper and lower ends are welded with the top plate 2-6 and the bottom plate 2-5 respectively. The distance between the inner edges of the two support plates 2-14 is larger than the inner diameter of the flange plate 2-10 and smaller than the outer diameter of the flange plate 2-10 so as to support the flange plate 2-10. The support column 2-15 is welded above the middle partition plate 2-44, the lower part of the support column 2-15 is supported on the middle partition plate 2-4, and the upper part is supported on the top plate 2-6-2. The vertical axis of the support post 2-15 is located between the inner and outer diameters of the flange 2-10. The outer diameter edge of the flange plate 2-10 above the front end plate 2-4 is flush with the outer end surface of the front end plate 2-4, so that the front end plate 2-4 can play a role in supporting the flange plate.
A U-shaped air deflector 2-16 is welded between the top plate 2-6 above the cooling cavity 2-18 and the air baffle 2-12, and the U-shaped air deflector 2-16 is positioned between the support plates 2-14. The height of the U-shaped air deflector 2-16 is equal to the distance between the top plate 2-6-2 and the air deflector 2-12, and the opening becomes gradually larger and faces the B cooling cavity 2-19 of the air-to-air cooler. Both ends of the U-shaped air deflector 2-16 arc plate in the length direction are welded on the air-to-air cooler side plates 2-7. After the internal forced air fan 2-11 is installed, the internal forced air fan 2-11 is positioned inside the U-shaped air deflector 2-16.
The internal forced ventilation motor 2-8, the motor seat board 2-9, the flange plate 2-10, the internal forced ventilation fan 2-11, the air baffle plate 2-12, the circular ring 2-13 and the U-shaped air baffle plate 2-16 form an internal forced ventilation device.
According to the air-air cooling box type variable frequency motor, an air-air cooler 2 is connected with a machine base 1-1 through a bottom plate 2-5. The air cooler 2, the motor base 1-1, the end cover 1-2, the bearing device 1-3, the rotating shaft 1-4 and the like form a totally-enclosed shell, and the air in the motor is enclosed in the shell. The internal forced air motor 2-8 is mounted on the motor seat plate 2-9, the internal forced air fan 2-11 is mounted on the shaft extension of the motor 2-8, and then the motor seat plate 2-9 and the flange plate 2-10 are fixed together.
When the motor runs, the rotating shaft 1-4 drives the inner fan 1-8 to rotate, and wind pressure is generated. The internal forced air motor 2-8 drives the fan 2-11 to rotate, and wind pressure is generated. The cooling air cooled by the air cooler 2 in the motor enters the machine base 1-1 through the machine base air inlet 1-1-2 arranged above the non-shaft extending end of the machine base 1-1, and enters the ventilating duct of the cooling rotor arranged on the motor rotating shaft 1-4 or the rotor core 1-7 and the ventilating duct of the cooling stator arranged on the stator core 1-5 after being blown through the non-shaft extending end of the stator coil 1-6, and then enters the air inlet of the inner fan 1-8 after being blown through the axial ventilating opening 1-1-3 arranged at the shaft extending end supporting plate 1-1-1 of the machine base 1-1. The cooling air with the blowing effect of the inner fan 1-8 and the outside diameter of the inner fan 1-8 enters the A cooling cavity 2-18 of the air-to-air cooler 2 and passes through the outer surface of the cooling pipe 2-1 in the cavity of the A cooling cavity 2-18 and enters the inner forced air fan 2-11 through a round hole in the middle of the air baffle plate 2-12, wherein the base air outlet 1-1-4 is arranged on the base above the inner fan 1-8 and the cooler air inlet 2-5-2 is formed in the bottom plate 2-5 of the air-to-air cooler 2. The cooling air with the blowing effect of the inner fan 2-11 and the outside diameter of the inner fan 2-11 is obtained, enters the B cooling cavity 2-19 of the air-to-air cooler 2 through the gap between the upper end of the middle partition plate 2-44 and the top plate 2-6 of the air-to-air cooler in the height direction through the air guiding effect of the U-shaped air guiding plate 2-16, passes through the outer surface of the cooling pipe 2-1 in the cavity of the B cooling cavity 2-19, and enters the base 1-1 through the base air inlet 1-1-2 arranged above the non-shaft extending end of the base 1-1 again to form a single-side forced ventilation internal circulation air path.
After the inside of the motor is cooled by the air-to-air cooler 2, cooling air enters the engine base 1-1 and contacts with all heating parts in the motor main body 1, so that all parts in the motor main body 1 are cooled, and meanwhile, the temperature of the cooling air gradually rises. The cooling air entering the air-to-air cooler 2 transfers heat to the cooling pipe 2-1 when passing through the outer surface of the cooling pipe 2-1 in the cavity of the cooling cavity A2-18 after entering the cooling cavity A2-18, and obtains primary cooling; the cooling air enters the cooling cavity B2-19, and then heat is transferred to the cooling pipe 2-1 again when passing through the outer surface of the cooling pipe 2-1 in the cooling cavity B2-19, and the cooling air is cooled for the second time, gradually reduces in temperature and enters the engine base 1-1 again. The rear end plate 2-5 of the air-to-air cooler 2 is provided with an external forced ventilator 2-17 which pushes the outside air to pass through the inner hole of the cooling pipe 2-1 and takes away the heat of the cooling pipe 2-1. The cooling air in the motor continuously transfers the heat in the motor main body 1 to the cooling pipe 2-1 in the forced circulation process of the inner fan and is continuously cooled, so that the temperature rise of each part in the motor main body 1 is kept in a reasonable range, and the safe and reliable operation of the motor is ensured.
Embodiment two:
the air-air cooling box type variable frequency motor comprises a motor main body 1 and an air-air cooler 2 arranged above the motor main body 1, wherein the motor main body 1 comprises a machine base 1-1, a rotating shaft 1-4, a stator iron core 1-5, a stator coil 1-6, a rotor iron core 1-7 and an inner fan 1-8, a machine base air inlet 1-1-2 corresponding to the air-air cooler 2 is arranged above a non-shaft extending end of the machine base 1-1, the inner fan 1-8 is arranged at one end of the rotating shaft 1-4, which is positioned at the shaft extending end, a machine base air outlet 1-1-4 corresponding to the air-air cooler 2 is arranged at the machine base 1-1 above the inner fan 1-8, an air channel for cooling a rotor is arranged on the rotating shaft 1-4 or the rotor iron core 1-7, an air channel for cooling a stator is arranged on the stator iron core 1-5, and a wind shield 1-9 is arranged between the inner fan 1-8 and the stator iron core 1-5 and the rotor iron core 1-7. The support plate 1-1-1 for supporting the stator core 1-5 is fixedly arranged in the machine base 1-1, and the axial ventilation opening 1-1-3 is arranged at the support plate 1-1-1 of the shaft extension end of the machine base 1-1.
A single-sided inner air passage is formed inside the motor body 1.
The air-to-air cooler 2 is internally provided with an intermediate baffle plate 2-4 which divides the air-to-air cooler 2 into two independent cooling cavities axially arranged along a rotating shaft, the two cooling cavities are an A cooling cavity 2-18 and a B cooling cavity 2-19, the A cooling cavity 2-18 is communicated with the interior of the motor main body 1 at the position of the air inlet 1-1-2 of the engine base, and the B cooling cavity 2-19 is communicated with the interior of the motor main body 1 at the position of the air outlet 1-1-4 of the engine base; the air flow direction in the cooling cavities 2-18A is the air flow direction in the motor main body 1 to the air-air cooler 2, and the air flow direction in the cooling cavities 2-19B is the air flow direction in the air-air cooler 2 to the inside of the motor main body 1.
The air-to-air cooler 2 comprises an outer cover consisting of a front end plate 2-2, a rear end plate 2-3, a bottom plate 2-5, a top plate 2-6 and two side plates 2-7, wherein the position of the front end plate 2-2 corresponds to the shaft extension end of the machine base 1-1, the position of the rear end plate 2-2 corresponds to the non-shaft extension end of the machine base 1-1, the bottom plate 2-5 and the top plate 2-6 are respectively arranged at the bottom and the top of the air-to-air cooler 2, and the peripheries of the bottom plate 2-5 and the top plate 2-6 are fixedly connected with the two side plates 2-7, the front end plate 2-2 and the rear end plate 2-3 respectively.
The non-shaft extension end of the bottom plate 2-5 is provided with a cooler air outlet 2-5-1 corresponding to the engine base air inlet 1-1-2, and the shaft extension end of the bottom plate 2-5 is provided with a cooler air inlet 2-5-2 corresponding to the engine base air outlet 1-1-4.
The bottom plate 2-5 of the air-air cooler 2 is provided with a threaded hole corresponding to the unthreaded hole at the top of the machine base 1-1, and the air-air cooler 2 is fixedly connected with the machine base through the bottom plate 2-5.
The left end and the right end of the middle clapboard 2-4 are fixedly connected with the two side plates 2-7, and the lower end of the middle clapboard 2-4 is fixedly connected with the bottom plate 2-5; a gap in the height direction is reserved between the upper end of the middle partition plate 2-4 and the top of the air-air cooler 2.
The upper end of an intermediate baffle plate 2-4 of the hollow air cooler 2 and a top plate 2-6 of an air cooler housing are provided with gaps in the height direction, cooling air from a machine base 1-1 firstly enters an A cooling cavity 2-18, then enters a B cooling cavity 2-19 through the gaps above the intermediate baffle plate 2-4, and then enters the machine base 1-1 again to form a single-side circulating air path.
The air-to-air cooler 2 is internally and horizontally provided with a plurality of rows and a plurality of columns of cooling pipes in a penetrating way, the cooling pipes of the cooling pipes are arranged along the axial direction perpendicular to the rotating shaft 1-4, the external forced ventilator 2-17 is arranged at the side plate 2-7 of the air-to-air cooler 2, and the air outlet channel of the external forced ventilator 2-17 is connected with the cooling pipes.
The air-air cooler 2 is arranged above the A cooling cavity 2-19 and is provided with an internal forced air device, the internal forced air device comprises an air baffle plate 2-12, the air baffle plate 2-12 is arranged above the A cooling cavity 2-18 and is positioned above a cooling pipe, the air baffle plate 2-12 is provided with an air vent, a space enclosed between the air baffle plate 2-12 and the air-air cooler 2 and an intermediate baffle plate 2-4 is an internal forced air space, the internal forced air space is provided with a U-shaped air baffle plate 2-16, the opening of the U-shaped air baffle plate 2-16 gradually increases and faces the B cooling cavity 2-19, the U-shaped air baffle plate 2-16 is internally provided with an internal forced air fan 2-11, and the internal forced air fan 2-11 is in transmission connection with an internal forced air motor 2-8 arranged outside the air-air cooler 2.
The vent hole of the air baffle plate 2-12 is fixedly provided with a circular ring 2-13, part of the circular ring 2-13 is inserted into the air inlet of the internal forced ventilation fan 2-11, and the periphery of the air baffle plate 2-12 is fixedly connected with the front end plate 2-2, the side plate 2-7 and the middle partition plate 2-4 respectively.
The height of the U-shaped air deflector 2-16 is equal to the distance between the top plate 2-6 and the air deflector 2-12, and two ends of the arc-shaped plate of the U-shaped air deflector 2-16 in the length direction are respectively fixedly connected to the two side plates 2-7.
The internal forced air motor 2-8 is arranged as follows: a mounting hole is formed in a top plate 2-6 above the cooling cavity 2-18, a flange plate 2-10 is fixedly arranged at a position, corresponding to the mounting hole, outside the top plate 2-6, an inner forced air motor 2-8 is vertically arranged on the flange plate 2-10 through a motor seat plate 2-9 of the inner forced air motor, and a main shaft of the inner forced air motor 2-8 penetrates through the mounting hole and is connected with an inner forced air fan 2-11.
The inner sides of the two side plates 2-7 are respectively and fixedly connected with a supporting plate 2-14, the supporting plates 2-14 are positioned between the front end plate 2-2 and the middle partition plate 2-4, and the connecting line of the two supporting plates 2-14 is perpendicular to the axis of the rotating shaft 1-4 and coincides with the circle center of the flange plate 2-10;
the height of the supporting plates 2-14 is equal to the distance between the top plate 2-6 and the bottom plate 2-5, the upper end and the lower end of the supporting plates 2-14 are fixedly connected with the top plate 2-6 and the bottom plate 2-5 respectively, and the distance between the inner edges of the two supporting plates 2-14 is larger than the inner diameter of the flange plate 2-10 and smaller than the outer diameter of the flange plate 2-10.
The support column 2-15 is welded above the middle partition plate 2-4, the lower part of the support column 2-15 is supported on the middle partition plate 2-4, the upper part of the support column 2-15 is supported on the top plate 2-6, the vertical axis of the support column 2-15 is positioned between the inner diameter and the outer diameter of the flange plate 2-10, and the flange plate 2-10 is positioned on the outer diameter edge above the front end plate 2-2 and is flush with the outer end face of the front end plate 2-2.
When the motor runs, the rotating shaft 1-4 drives the inner fan 1-8 to rotate, and wind pressure is generated. The internal forced air motor 2-8 drives the fan 2-11 to rotate, and wind pressure is generated. The cooling air cooled by the air cooler 2 in the motor enters the machine base 1-1 through the machine base air inlet 1-1-2 arranged above the non-shaft extending end of the machine base 1-1, and enters the ventilating duct of the cooling rotor arranged on the motor rotating shaft 1-4 or the rotor core 1-7 and the ventilating duct of the cooling stator arranged on the stator core 1-5 after being blown through the non-shaft extending end of the stator coil 1-6, and then enters the air inlet of the inner fan 1-8 after being blown through the axial ventilating opening 1-1-3 arranged at the shaft extending end supporting plate 1-1-1 of the machine base 1-1. The cooling air with the blowing effect of the inner fan 1-8 and the outside diameter of the inner fan 1-8 is obtained, enters the A cooling cavity 2-18 of the air-to-air cooler 2 through the base air outlet 1-1-4 arranged on the base above the inner fan 1-8 and the cooler air inlet 2-5-2 processed by the bottom plate 2-5 of the air-to-air cooler 2, passes through the outer surface of the cooling pipe in the cavity of the A cooling cavity 2-18, passes through the round hole in the middle of the air baffle plate 2-12, and enters the internal forced ventilation fan 2-11. The cooling air with the blowing effect of the inner fan 2-11 and the outside diameter of the inner fan 2-11 is obtained, enters the B cooling cavity 2-19 of the air-to-air cooler 2 through the gap between the upper end of the middle partition plate 2-44 and the top plate 2-6 of the air-to-air cooler in the height direction through the air guiding effect of the U-shaped air guiding plate 2-16, passes through the outer surface of the cooling pipe in the cavity 2-19 of the B cooling cavity, and enters the base 1-1 through the base air inlet 1-1-2 arranged above the non-shaft extending end of the base 1-1 again to form a single-side forced ventilation internal circulation air path.
After the inside of the motor is cooled by the air-to-air cooler 2, cooling air enters the engine base 1-1 and contacts with all heating parts in the motor main body 1, so that all parts in the motor main body 1 are cooled, and meanwhile, the temperature of the cooling air gradually rises. The cooling air entering the air-to-air cooler 2 transfers heat to the cooling pipes when passing through the outer surfaces of the cooling pipes in the cavities of the cooling cavities 2-18 after entering the cooling cavities 2-18A, and obtains primary cooling; the cooling air enters the cooling cavity B2-19, then the heat is transferred to the cooling pipe again when passing through the outer surface of the cooling pipe in the cooling cavity B2-19, and the cooling air is cooled for the second time, the temperature is gradually reduced, and the cooling air enters the engine base 1-1 again. The side plates 2-7 of the air-to-air cooler 2 are provided with external forced fans 2-17 which push the outside air through the inner holes of the cooling pipes and take away the heat of the cooling pipes. The cooling air in the motor continuously transfers the heat in the motor main body 1 to the cooling pipe in the forced circulation process of the inner fan, and is continuously cooled, so that the temperature rise of each part in the motor main body 1 is kept in a reasonable range, and the safe and reliable operation of the motor is ensured.
The difference between this embodiment and the first embodiment is that the cooling tube is disposed along the axis direction perpendicular to the rotating shaft 1-4, the outer walls of the two ends of the cooling tube are fixed on the side plates 2-7 of the air-air cooler housing, and the external forced ventilator 2-8 is installed at the side plates 2-7 of the air-air cooler housing, which also achieves the effect of pushing the outside air through the inner holes of the cooling tube and taking away the heat of the wall of the cooling tube.
According to the technical scheme of the first embodiment and the second embodiment, the inner air passage of the motor main body 1 is designed to be of a single-side inner air passage structure, the inner forced air motor 2-8 and the inner forced air fan 2-11 are arranged above the cooling cavity A2-18, and the forced air power element is added to the single-side inner air passage of the air-air cooler 2, so that the air passage of the box-type variable frequency motor main body and the air passage of the air-air cooler 2 are connected in series to form the single-side forced air inner air passage structure of the whole motor. The centrifugal inner fan 1-8 with large outer diameter arranged on the rotating shaft 1-4 can generate higher wind pressure when the motor operates, and can work in series with the wind pressure generated by the inner forced air fan 2-11 of the air-air cooler 4, so that the wind pressure of the circulation of the inner wind path of the motor is improved, the wind quantity of the inner wind path is further improved, and the cooling effect of the motor is improved.
The U-shaped air deflector 2-16 can guide the air flow generated by the internal forced ventilation fan 2-11 to smoothly flow to the air outlet area, and avoid vortex loss of the air flow at the corners of the air-air cooler 4 and the support plates 2-14 welded on the side plates of the air-air cooler 4, thereby improving the ventilation efficiency of the fan and the cooling effect.
The inner air path of the motor main body adopts a single-side inner air path structure, and the structure of the motor main body is the same as that of a box type non-variable frequency motor with the same base number, so that other main parts of the motor main body such as a base, an end cover, a bearing device, a rotating shaft, a stator core, a stator coil, a rotor core, an inner fan, a wind shield and the like can be used for the box type non-variable frequency motor with the same base number except for a stator coil, the universalization degree of the motor parts is high, batch production can be realized, the labor productivity is improved, and the production and the manufacturing cost of the motor are reduced.
The hollow air cooler 2 fully utilizes the structural members of the hollow air cooler as the support of the internal forced air motor 2-8, so that the support strength can be obviously improved, and the vibration of the internal forced air motor 2-8 can be reduced.
The support plate 2-14, the support column 2-15 and the front end plate 2-2 of the air-air cooler 2 can play a supporting role, can improve the supporting strength of the flange plate 2-10 and avoid the vibration of the internal forced ventilation motor 2-8.
In the invention, the inner forced ventilation motor 2-8 and the outer forced ventilation motor 2-11 are respectively positioned at two ends of the air-air cooler 2, the interval distance is longer, resonance of the inner forced ventilation motor and the outer forced ventilation motor can be avoided through the damping function of structural members of the air-air cooler, and the operation reliability of the forced ventilation motor can be improved.
The above embodiments are only for illustrating the technical solution of the present invention, and it should be understood by those skilled in the art that although the present invention has been described in detail with reference to the above embodiments: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, which is intended to be encompassed by the claims.
In the description of the present invention, it should be understood that the terms "top," "bottom," "front," "rear," "upper," "lower," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present invention.
Claims (6)
1. The utility model provides an air-to-air cooling formula variable frequency motor, includes motor body and installs the air-to-air cooler in motor body top, and motor body includes frame, pivot, stator core, stator coil, rotor core and interior fan, its characterized in that:
a machine seat air inlet corresponding to the air-to-air cooler is arranged above the non-shaft extension end of the machine seat, an inner fan is arranged at one end of the shaft extension end of the rotating shaft, a machine seat air outlet corresponding to the air-to-air cooler is arranged at the machine seat above the inner fan, and a single-side inner air path is formed inside the motor main body;
the air-to-air cooler is internally provided with an intermediate baffle plate to divide the air-to-air cooler into two independent cooling cavities axially arranged along the rotating shaft, wherein the two cooling cavities are an A cooling cavity and a B cooling cavity respectively, the A cooling cavity is communicated with the interior of the motor main body at the air inlet of the engine base, and the B cooling cavity is communicated with the interior of the motor main body at the air outlet of the engine base; the air flow direction in the cooling cavity A is the air flow direction in the motor main body and the air flow direction in the air-to-air cooler, and the air flow direction in the cooling cavity B is the air flow direction in the air-to-air cooler and the motor main body;
a gap in the height direction is reserved between the upper end of the middle partition plate and the top of the air-air cooler;
a plurality of rows of cooling pipes are horizontally arranged in the air-air cooler in a penetrating way, and the cooling pipes penetrate through the middle partition plate; an air outlet channel of the external forced ventilator is connected with the cooling pipe;
the air-air cooler is arranged above the cooling cavity A, an internal forced air device is arranged above the cooling cavity A, the internal forced air device comprises an air baffle plate, the air baffle plate is arranged in the cooling cavity A and is positioned above the cooling pipe, a vent hole is formed in the air baffle plate, a space enclosed between the air baffle plate, the air-air cooler and the middle partition plate is an internal forced air space, a U-shaped air deflector is arranged in the internal forced air space, the opening of the U-shaped air deflector is gradually enlarged and faces the cooling cavity B, an internal forced air fan is arranged in the U-shaped air deflector, and the internal forced air fan is in transmission connection with an internal forced air motor arranged outside the air-air cooler;
the arrangement mode of the internal forced air motor is as follows: a mounting hole is formed in the top plate above the cooling cavity A, a flange plate is fixedly arranged at the position, corresponding to the mounting hole, outside the top plate, of the inner forced ventilation motor, the inner forced ventilation motor is vertically arranged on the flange plate through a motor seat plate of the inner forced ventilation motor, and a main shaft of the inner forced ventilation motor penetrates through the mounting hole and is connected with an inner forced ventilation fan;
the inner sides of the two side plates are respectively and fixedly connected with a supporting plate, the supporting plates are positioned between the front end plate and the middle partition plate, and the connecting line of the two supporting plates is perpendicular to the axis of the rotating shaft and coincides with the circle center of the flange plate;
the height of the supporting plate is equal to the distance between the top plate and the bottom plate, the upper end and the lower end of the supporting plate are respectively fixedly connected with the top plate and the bottom plate,
the distance between the inner edges of the two support plates is larger than the inner diameter of the flange plate and smaller than the outer diameter of the flange plate;
the upper part of the middle partition plate is welded with a support column, the lower part of the support column is supported on the middle partition plate, the upper part of the support column is supported on the top plate, the vertical axis of the support column is positioned between the inner diameter and the outer diameter of the flange plate, and the flange plate is positioned on the edge of the outer diameter above the front end plate and is flush with the outer end surface of the front end plate;
the air vent of the air baffle plate is fixedly provided with a circular ring, the length of part of the circular ring is inserted into the air inlet of the internal forced ventilation fan, and the periphery of the air baffle plate is fixedly connected with the front end plate, the side plate and the middle partition plate respectively;
the height of the U-shaped air guide plate is equal to the distance between the top plate and the air separation plate, and two ends of the arc-shaped plate of the U-shaped air guide plate in the length direction are fixedly connected to the two side plates respectively;
the left end and the right end of the middle partition plate are fixedly connected with the two side plates, and the lower end of the middle partition plate is fixedly connected with the bottom plate;
the support plate for supporting the stator core is fixedly arranged in the machine base, and an axial ventilation opening is arranged at the support plate at the shaft extension end of the machine base.
2. The air-to-air cooled box-type variable frequency motor of claim 1, wherein: the air-to-air cooler comprises an outer cover consisting of a front end plate, a rear end plate, a bottom plate, a top plate and two side plates, wherein the front end plate corresponds to the shaft extension end of the machine base, the rear end plate corresponds to the non-shaft extension end of the machine base, the bottom plate and the top plate are respectively arranged at the bottom and the top of the air-to-air cooler, and the peripheries of the bottom plate and the top plate are respectively fixedly connected with the two side plates, the front end plate and the rear end plate;
the non-shaft extension end of the bottom plate is provided with a cooler air outlet corresponding to the air inlet of the machine base, and the shaft extension end of the bottom plate is provided with a cooler air inlet corresponding to the air outlet of the machine base.
3. The air-to-air cooled box-type variable frequency motor of claim 2, wherein: the bottom plate of the air-air cooler is provided with a threaded hole corresponding to the unthreaded hole at the top of the machine base, and the air-air cooler is fixedly connected with the machine base through the bottom plate.
4. The air-to-air cooled box-type variable frequency motor of claim 2, wherein: the cooling pipe is arranged along the axis direction parallel to the rotating shaft, and the external forced ventilator is arranged at the rear end plate of the air-to-air cooler.
5. The air-to-air cooled box-type variable frequency motor of claim 2, wherein: the cooling pipe is arranged along the axis direction vertical to the rotating shaft, and the external forced ventilator is arranged at the side plate of the air-air cooler.
6. The air-to-air cooled box-type variable frequency motor of claim 1, wherein: the motor comprises a motor body, wherein a rotating shaft or a rotor core of the motor body is provided with an air channel for cooling a rotor, a stator core of the motor body is provided with an air channel for cooling a stator, and a wind shield is arranged between an inner fan and the stator core and between the inner fan and the rotor core.
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| CN202111588U (en) * | 2011-07-05 | 2012-01-11 | 上海马拉松·革新电气有限公司 | Air to air cooled generator with coaxial fans |
| CN203984162U (en) * | 2014-05-02 | 2014-12-03 | 宁波市成大机械研究所 | Absolutely empty cold anticyclone high-efficiency electric motor |
| CN204517609U (en) * | 2015-03-30 | 2015-07-29 | 沈阳远大科技园有限公司 | Self-lubricating security enhanced high pressure threephase asynchronous machine |
| CN105356648A (en) * | 2015-12-03 | 2016-02-24 | 卧龙电气南阳防爆集团股份有限公司 | High-power, low-speed and positive-pressure type explosion-proof induction motor |
| CN105356668A (en) * | 2015-12-03 | 2016-02-24 | 卧龙电气南阳防爆集团股份有限公司 | Air-cooling and water-cooling alternately-cooled three-phase asynchronous motor |
| CN206302259U (en) * | 2016-12-16 | 2017-07-04 | 卧龙电气集团股份有限公司 | The absolutely empty box variable-frequency motor of cooling type |
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Address after: No. 1801, Dushan Avenue, Nanyang City, Henan Province Patentee after: WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GROUP Co.,Ltd. Country or region after: China Patentee after: WOLONG ELECTRIC GROUP Co.,Ltd. Address before: 312300 Economic Development Zone, Shangyu District, Shaoxing City, Zhejiang Province Patentee before: WOLONG ELECTRIC GROUP Co.,Ltd. Country or region before: China Patentee before: WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GROUP Co.,Ltd. Address after: 312300 Economic Development Zone, Shangyu District, Shaoxing City, Zhejiang Province Patentee after: WOLONG ELECTRIC GROUP Co.,Ltd. Country or region after: China Patentee after: WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GROUP Co.,Ltd. Address before: 312300 Economic Development Zone, Shangyu District, Shaoxing City, Zhejiang Province Patentee before: WOLONG ELECTRIC GROUP Co.,Ltd. Country or region before: China Patentee before: WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GROUP Co.,Ltd. |
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